Version:  2.0.40 2.2.26 2.4.37 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4

Linux/drivers/scsi/arcmsr/arcmsr_hba.c

  1 /*
  2 *******************************************************************************
  3 **        O.S   : Linux
  4 **   FILE NAME  : arcmsr_hba.c
  5 **        BY    : Nick Cheng, C.L. Huang
  6 **   Description: SCSI RAID Device Driver for Areca RAID Controller
  7 *******************************************************************************
  8 ** Copyright (C) 2002 - 2014, Areca Technology Corporation All rights reserved
  9 **
 10 **     Web site: www.areca.com.tw
 11 **       E-mail: support@areca.com.tw
 12 **
 13 ** This program is free software; you can redistribute it and/or modify
 14 ** it under the terms of the GNU General Public License version 2 as
 15 ** published by the Free Software Foundation.
 16 ** This program is distributed in the hope that it will be useful,
 17 ** but WITHOUT ANY WARRANTY; without even the implied warranty of
 18 ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 19 ** GNU General Public License for more details.
 20 *******************************************************************************
 21 ** Redistribution and use in source and binary forms, with or without
 22 ** modification, are permitted provided that the following conditions
 23 ** are met:
 24 ** 1. Redistributions of source code must retain the above copyright
 25 **    notice, this list of conditions and the following disclaimer.
 26 ** 2. Redistributions in binary form must reproduce the above copyright
 27 **    notice, this list of conditions and the following disclaimer in the
 28 **    documentation and/or other materials provided with the distribution.
 29 ** 3. The name of the author may not be used to endorse or promote products
 30 **    derived from this software without specific prior written permission.
 31 **
 32 ** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 33 ** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 34 ** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 35 ** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 36 ** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES(INCLUDING,BUT
 37 ** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 38 ** DATA, OR PROFITS; OR BUSINESS INTERRUPTION)HOWEVER CAUSED AND ON ANY
 39 ** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 40 ** (INCLUDING NEGLIGENCE OR OTHERWISE)ARISING IN ANY WAY OUT OF THE USE OF
 41 ** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 42 *******************************************************************************
 43 ** For history of changes, see Documentation/scsi/ChangeLog.arcmsr
 44 **     Firmware Specification, see Documentation/scsi/arcmsr_spec.txt
 45 *******************************************************************************
 46 */
 47 #include <linux/module.h>
 48 #include <linux/reboot.h>
 49 #include <linux/spinlock.h>
 50 #include <linux/pci_ids.h>
 51 #include <linux/interrupt.h>
 52 #include <linux/moduleparam.h>
 53 #include <linux/errno.h>
 54 #include <linux/types.h>
 55 #include <linux/delay.h>
 56 #include <linux/dma-mapping.h>
 57 #include <linux/timer.h>
 58 #include <linux/slab.h>
 59 #include <linux/pci.h>
 60 #include <linux/aer.h>
 61 #include <linux/circ_buf.h>
 62 #include <asm/dma.h>
 63 #include <asm/io.h>
 64 #include <asm/uaccess.h>
 65 #include <scsi/scsi_host.h>
 66 #include <scsi/scsi.h>
 67 #include <scsi/scsi_cmnd.h>
 68 #include <scsi/scsi_tcq.h>
 69 #include <scsi/scsi_device.h>
 70 #include <scsi/scsi_transport.h>
 71 #include <scsi/scsicam.h>
 72 #include "arcmsr.h"
 73 MODULE_AUTHOR("Nick Cheng, C.L. Huang <support@areca.com.tw>");
 74 MODULE_DESCRIPTION("Areca ARC11xx/12xx/16xx/188x SAS/SATA RAID Controller Driver");
 75 MODULE_LICENSE("Dual BSD/GPL");
 76 MODULE_VERSION(ARCMSR_DRIVER_VERSION);
 77 
 78 #define ARCMSR_SLEEPTIME        10
 79 #define ARCMSR_RETRYCOUNT       12
 80 
 81 static wait_queue_head_t wait_q;
 82 static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
 83                                         struct scsi_cmnd *cmd);
 84 static int arcmsr_iop_confirm(struct AdapterControlBlock *acb);
 85 static int arcmsr_abort(struct scsi_cmnd *);
 86 static int arcmsr_bus_reset(struct scsi_cmnd *);
 87 static int arcmsr_bios_param(struct scsi_device *sdev,
 88                 struct block_device *bdev, sector_t capacity, int *info);
 89 static int arcmsr_queue_command(struct Scsi_Host *h, struct scsi_cmnd *cmd);
 90 static int arcmsr_probe(struct pci_dev *pdev,
 91                                 const struct pci_device_id *id);
 92 static int arcmsr_suspend(struct pci_dev *pdev, pm_message_t state);
 93 static int arcmsr_resume(struct pci_dev *pdev);
 94 static void arcmsr_remove(struct pci_dev *pdev);
 95 static void arcmsr_shutdown(struct pci_dev *pdev);
 96 static void arcmsr_iop_init(struct AdapterControlBlock *acb);
 97 static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb);
 98 static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb);
 99 static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb,
100         u32 intmask_org);
101 static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb);
102 static void arcmsr_hbaA_flush_cache(struct AdapterControlBlock *acb);
103 static void arcmsr_hbaB_flush_cache(struct AdapterControlBlock *acb);
104 static void arcmsr_request_device_map(unsigned long pacb);
105 static void arcmsr_hbaA_request_device_map(struct AdapterControlBlock *acb);
106 static void arcmsr_hbaB_request_device_map(struct AdapterControlBlock *acb);
107 static void arcmsr_hbaC_request_device_map(struct AdapterControlBlock *acb);
108 static void arcmsr_message_isr_bh_fn(struct work_struct *work);
109 static bool arcmsr_get_firmware_spec(struct AdapterControlBlock *acb);
110 static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb);
111 static void arcmsr_hbaC_message_isr(struct AdapterControlBlock *pACB);
112 static void arcmsr_hbaD_message_isr(struct AdapterControlBlock *acb);
113 static void arcmsr_hardware_reset(struct AdapterControlBlock *acb);
114 static const char *arcmsr_info(struct Scsi_Host *);
115 static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb);
116 static void arcmsr_free_irq(struct pci_dev *, struct AdapterControlBlock *);
117 static int arcmsr_adjust_disk_queue_depth(struct scsi_device *sdev, int queue_depth)
118 {
119         if (queue_depth > ARCMSR_MAX_CMD_PERLUN)
120                 queue_depth = ARCMSR_MAX_CMD_PERLUN;
121         return scsi_change_queue_depth(sdev, queue_depth);
122 }
123 
124 static struct scsi_host_template arcmsr_scsi_host_template = {
125         .module                 = THIS_MODULE,
126         .name                   = "Areca SAS/SATA RAID driver",
127         .info                   = arcmsr_info,
128         .queuecommand           = arcmsr_queue_command,
129         .eh_abort_handler               = arcmsr_abort,
130         .eh_bus_reset_handler   = arcmsr_bus_reset,
131         .bios_param             = arcmsr_bios_param,
132         .change_queue_depth     = arcmsr_adjust_disk_queue_depth,
133         .can_queue              = ARCMSR_MAX_OUTSTANDING_CMD,
134         .this_id                        = ARCMSR_SCSI_INITIATOR_ID,
135         .sg_tablesize                   = ARCMSR_DEFAULT_SG_ENTRIES, 
136         .max_sectors                    = ARCMSR_MAX_XFER_SECTORS_C, 
137         .cmd_per_lun            = ARCMSR_MAX_CMD_PERLUN,
138         .use_clustering         = ENABLE_CLUSTERING,
139         .shost_attrs            = arcmsr_host_attrs,
140         .no_write_same          = 1,
141 };
142 
143 static struct pci_device_id arcmsr_device_id_table[] = {
144         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1110),
145                 .driver_data = ACB_ADAPTER_TYPE_A},
146         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1120),
147                 .driver_data = ACB_ADAPTER_TYPE_A},
148         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1130),
149                 .driver_data = ACB_ADAPTER_TYPE_A},
150         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1160),
151                 .driver_data = ACB_ADAPTER_TYPE_A},
152         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1170),
153                 .driver_data = ACB_ADAPTER_TYPE_A},
154         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1200),
155                 .driver_data = ACB_ADAPTER_TYPE_B},
156         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1201),
157                 .driver_data = ACB_ADAPTER_TYPE_B},
158         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1202),
159                 .driver_data = ACB_ADAPTER_TYPE_B},
160         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1210),
161                 .driver_data = ACB_ADAPTER_TYPE_A},
162         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1214),
163                 .driver_data = ACB_ADAPTER_TYPE_D},
164         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1220),
165                 .driver_data = ACB_ADAPTER_TYPE_A},
166         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1230),
167                 .driver_data = ACB_ADAPTER_TYPE_A},
168         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1260),
169                 .driver_data = ACB_ADAPTER_TYPE_A},
170         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1270),
171                 .driver_data = ACB_ADAPTER_TYPE_A},
172         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1280),
173                 .driver_data = ACB_ADAPTER_TYPE_A},
174         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1380),
175                 .driver_data = ACB_ADAPTER_TYPE_A},
176         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1381),
177                 .driver_data = ACB_ADAPTER_TYPE_A},
178         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1680),
179                 .driver_data = ACB_ADAPTER_TYPE_A},
180         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1681),
181                 .driver_data = ACB_ADAPTER_TYPE_A},
182         {PCI_DEVICE(PCI_VENDOR_ID_ARECA, PCI_DEVICE_ID_ARECA_1880),
183                 .driver_data = ACB_ADAPTER_TYPE_C},
184         {0, 0}, /* Terminating entry */
185 };
186 MODULE_DEVICE_TABLE(pci, arcmsr_device_id_table);
187 
188 static struct pci_driver arcmsr_pci_driver = {
189         .name                   = "arcmsr",
190         .id_table                       = arcmsr_device_id_table,
191         .probe                  = arcmsr_probe,
192         .remove                 = arcmsr_remove,
193         .suspend                = arcmsr_suspend,
194         .resume                 = arcmsr_resume,
195         .shutdown               = arcmsr_shutdown,
196 };
197 /*
198 ****************************************************************************
199 ****************************************************************************
200 */
201 
202 static void arcmsr_free_mu(struct AdapterControlBlock *acb)
203 {
204         switch (acb->adapter_type) {
205         case ACB_ADAPTER_TYPE_B:
206         case ACB_ADAPTER_TYPE_D: {
207                 dma_free_coherent(&acb->pdev->dev, acb->roundup_ccbsize,
208                         acb->dma_coherent2, acb->dma_coherent_handle2);
209                 break;
210         }
211         }
212 }
213 
214 static bool arcmsr_remap_pciregion(struct AdapterControlBlock *acb)
215 {
216         struct pci_dev *pdev = acb->pdev;
217         switch (acb->adapter_type){
218         case ACB_ADAPTER_TYPE_A:{
219                 acb->pmuA = ioremap(pci_resource_start(pdev,0), pci_resource_len(pdev,0));
220                 if (!acb->pmuA) {
221                         printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
222                         return false;
223                 }
224                 break;
225         }
226         case ACB_ADAPTER_TYPE_B:{
227                 void __iomem *mem_base0, *mem_base1;
228                 mem_base0 = ioremap(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
229                 if (!mem_base0) {
230                         printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
231                         return false;
232                 }
233                 mem_base1 = ioremap(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
234                 if (!mem_base1) {
235                         iounmap(mem_base0);
236                         printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
237                         return false;
238                 }
239                 acb->mem_base0 = mem_base0;
240                 acb->mem_base1 = mem_base1;
241                 break;
242         }
243         case ACB_ADAPTER_TYPE_C:{
244                 acb->pmuC = ioremap_nocache(pci_resource_start(pdev, 1), pci_resource_len(pdev, 1));
245                 if (!acb->pmuC) {
246                         printk(KERN_NOTICE "arcmsr%d: memory mapping region fail \n", acb->host->host_no);
247                         return false;
248                 }
249                 if (readl(&acb->pmuC->outbound_doorbell) & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
250                         writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR, &acb->pmuC->outbound_doorbell_clear);/*clear interrupt*/
251                         return true;
252                 }
253                 break;
254         }
255         case ACB_ADAPTER_TYPE_D: {
256                 void __iomem *mem_base0;
257                 unsigned long addr, range, flags;
258 
259                 addr = (unsigned long)pci_resource_start(pdev, 0);
260                 range = pci_resource_len(pdev, 0);
261                 flags = pci_resource_flags(pdev, 0);
262                 mem_base0 = ioremap(addr, range);
263                 if (!mem_base0) {
264                         pr_notice("arcmsr%d: memory mapping region fail\n",
265                                 acb->host->host_no);
266                         return false;
267                 }
268                 acb->mem_base0 = mem_base0;
269                 break;
270                 }
271         }
272         return true;
273 }
274 
275 static void arcmsr_unmap_pciregion(struct AdapterControlBlock *acb)
276 {
277         switch (acb->adapter_type) {
278         case ACB_ADAPTER_TYPE_A:{
279                 iounmap(acb->pmuA);
280         }
281         break;
282         case ACB_ADAPTER_TYPE_B:{
283                 iounmap(acb->mem_base0);
284                 iounmap(acb->mem_base1);
285         }
286 
287         break;
288         case ACB_ADAPTER_TYPE_C:{
289                 iounmap(acb->pmuC);
290         }
291         break;
292         case ACB_ADAPTER_TYPE_D:
293                 iounmap(acb->mem_base0);
294                 break;
295         }
296 }
297 
298 static irqreturn_t arcmsr_do_interrupt(int irq, void *dev_id)
299 {
300         irqreturn_t handle_state;
301         struct AdapterControlBlock *acb = dev_id;
302 
303         handle_state = arcmsr_interrupt(acb);
304         return handle_state;
305 }
306 
307 static int arcmsr_bios_param(struct scsi_device *sdev,
308                 struct block_device *bdev, sector_t capacity, int *geom)
309 {
310         int ret, heads, sectors, cylinders, total_capacity;
311         unsigned char *buffer;/* return copy of block device's partition table */
312 
313         buffer = scsi_bios_ptable(bdev);
314         if (buffer) {
315                 ret = scsi_partsize(buffer, capacity, &geom[2], &geom[0], &geom[1]);
316                 kfree(buffer);
317                 if (ret != -1)
318                         return ret;
319         }
320         total_capacity = capacity;
321         heads = 64;
322         sectors = 32;
323         cylinders = total_capacity / (heads * sectors);
324         if (cylinders > 1024) {
325                 heads = 255;
326                 sectors = 63;
327                 cylinders = total_capacity / (heads * sectors);
328         }
329         geom[0] = heads;
330         geom[1] = sectors;
331         geom[2] = cylinders;
332         return 0;
333 }
334 
335 static uint8_t arcmsr_hbaA_wait_msgint_ready(struct AdapterControlBlock *acb)
336 {
337         struct MessageUnit_A __iomem *reg = acb->pmuA;
338         int i;
339 
340         for (i = 0; i < 2000; i++) {
341                 if (readl(&reg->outbound_intstatus) &
342                                 ARCMSR_MU_OUTBOUND_MESSAGE0_INT) {
343                         writel(ARCMSR_MU_OUTBOUND_MESSAGE0_INT,
344                                 &reg->outbound_intstatus);
345                         return true;
346                 }
347                 msleep(10);
348         } /* max 20 seconds */
349 
350         return false;
351 }
352 
353 static uint8_t arcmsr_hbaB_wait_msgint_ready(struct AdapterControlBlock *acb)
354 {
355         struct MessageUnit_B *reg = acb->pmuB;
356         int i;
357 
358         for (i = 0; i < 2000; i++) {
359                 if (readl(reg->iop2drv_doorbell)
360                         & ARCMSR_IOP2DRV_MESSAGE_CMD_DONE) {
361                         writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN,
362                                         reg->iop2drv_doorbell);
363                         writel(ARCMSR_DRV2IOP_END_OF_INTERRUPT,
364                                         reg->drv2iop_doorbell);
365                         return true;
366                 }
367                 msleep(10);
368         } /* max 20 seconds */
369 
370         return false;
371 }
372 
373 static uint8_t arcmsr_hbaC_wait_msgint_ready(struct AdapterControlBlock *pACB)
374 {
375         struct MessageUnit_C __iomem *phbcmu = pACB->pmuC;
376         int i;
377 
378         for (i = 0; i < 2000; i++) {
379                 if (readl(&phbcmu->outbound_doorbell)
380                                 & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
381                         writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR,
382                                 &phbcmu->outbound_doorbell_clear); /*clear interrupt*/
383                         return true;
384                 }
385                 msleep(10);
386         } /* max 20 seconds */
387 
388         return false;
389 }
390 
391 static bool arcmsr_hbaD_wait_msgint_ready(struct AdapterControlBlock *pACB)
392 {
393         struct MessageUnit_D *reg = pACB->pmuD;
394         int i;
395 
396         for (i = 0; i < 2000; i++) {
397                 if (readl(reg->outbound_doorbell)
398                         & ARCMSR_ARC1214_IOP2DRV_MESSAGE_CMD_DONE) {
399                         writel(ARCMSR_ARC1214_IOP2DRV_MESSAGE_CMD_DONE,
400                                 reg->outbound_doorbell);
401                         return true;
402                 }
403                 msleep(10);
404         } /* max 20 seconds */
405         return false;
406 }
407 
408 static void arcmsr_hbaA_flush_cache(struct AdapterControlBlock *acb)
409 {
410         struct MessageUnit_A __iomem *reg = acb->pmuA;
411         int retry_count = 30;
412         writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
413         do {
414                 if (arcmsr_hbaA_wait_msgint_ready(acb))
415                         break;
416                 else {
417                         retry_count--;
418                         printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
419                         timeout, retry count down = %d \n", acb->host->host_no, retry_count);
420                 }
421         } while (retry_count != 0);
422 }
423 
424 static void arcmsr_hbaB_flush_cache(struct AdapterControlBlock *acb)
425 {
426         struct MessageUnit_B *reg = acb->pmuB;
427         int retry_count = 30;
428         writel(ARCMSR_MESSAGE_FLUSH_CACHE, reg->drv2iop_doorbell);
429         do {
430                 if (arcmsr_hbaB_wait_msgint_ready(acb))
431                         break;
432                 else {
433                         retry_count--;
434                         printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
435                         timeout,retry count down = %d \n", acb->host->host_no, retry_count);
436                 }
437         } while (retry_count != 0);
438 }
439 
440 static void arcmsr_hbaC_flush_cache(struct AdapterControlBlock *pACB)
441 {
442         struct MessageUnit_C __iomem *reg = pACB->pmuC;
443         int retry_count = 30;/* enlarge wait flush adapter cache time: 10 minute */
444         writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, &reg->inbound_msgaddr0);
445         writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
446         do {
447                 if (arcmsr_hbaC_wait_msgint_ready(pACB)) {
448                         break;
449                 } else {
450                         retry_count--;
451                         printk(KERN_NOTICE "arcmsr%d: wait 'flush adapter cache' \
452                         timeout,retry count down = %d \n", pACB->host->host_no, retry_count);
453                 }
454         } while (retry_count != 0);
455         return;
456 }
457 
458 static void arcmsr_hbaD_flush_cache(struct AdapterControlBlock *pACB)
459 {
460         int retry_count = 15;
461         struct MessageUnit_D *reg = pACB->pmuD;
462 
463         writel(ARCMSR_INBOUND_MESG0_FLUSH_CACHE, reg->inbound_msgaddr0);
464         do {
465                 if (arcmsr_hbaD_wait_msgint_ready(pACB))
466                         break;
467 
468                 retry_count--;
469                 pr_notice("arcmsr%d: wait 'flush adapter "
470                         "cache' timeout, retry count down = %d\n",
471                         pACB->host->host_no, retry_count);
472         } while (retry_count != 0);
473 }
474 
475 static void arcmsr_flush_adapter_cache(struct AdapterControlBlock *acb)
476 {
477         switch (acb->adapter_type) {
478 
479         case ACB_ADAPTER_TYPE_A: {
480                 arcmsr_hbaA_flush_cache(acb);
481                 }
482                 break;
483 
484         case ACB_ADAPTER_TYPE_B: {
485                 arcmsr_hbaB_flush_cache(acb);
486                 }
487                 break;
488         case ACB_ADAPTER_TYPE_C: {
489                 arcmsr_hbaC_flush_cache(acb);
490                 }
491                 break;
492         case ACB_ADAPTER_TYPE_D:
493                 arcmsr_hbaD_flush_cache(acb);
494                 break;
495         }
496 }
497 
498 static int arcmsr_alloc_ccb_pool(struct AdapterControlBlock *acb)
499 {
500         struct pci_dev *pdev = acb->pdev;
501         void *dma_coherent;
502         dma_addr_t dma_coherent_handle;
503         struct CommandControlBlock *ccb_tmp;
504         int i = 0, j = 0;
505         dma_addr_t cdb_phyaddr;
506         unsigned long roundup_ccbsize;
507         unsigned long max_xfer_len;
508         unsigned long max_sg_entrys;
509         uint32_t  firm_config_version;
510 
511         for (i = 0; i < ARCMSR_MAX_TARGETID; i++)
512                 for (j = 0; j < ARCMSR_MAX_TARGETLUN; j++)
513                         acb->devstate[i][j] = ARECA_RAID_GONE;
514 
515         max_xfer_len = ARCMSR_MAX_XFER_LEN;
516         max_sg_entrys = ARCMSR_DEFAULT_SG_ENTRIES;
517         firm_config_version = acb->firm_cfg_version;
518         if((firm_config_version & 0xFF) >= 3){
519                 max_xfer_len = (ARCMSR_CDB_SG_PAGE_LENGTH << ((firm_config_version >> 8) & 0xFF)) * 1024;/* max 4M byte */
520                 max_sg_entrys = (max_xfer_len/4096);
521         }
522         acb->host->max_sectors = max_xfer_len/512;
523         acb->host->sg_tablesize = max_sg_entrys;
524         roundup_ccbsize = roundup(sizeof(struct CommandControlBlock) + (max_sg_entrys - 1) * sizeof(struct SG64ENTRY), 32);
525         acb->uncache_size = roundup_ccbsize * ARCMSR_MAX_FREECCB_NUM;
526         dma_coherent = dma_alloc_coherent(&pdev->dev, acb->uncache_size, &dma_coherent_handle, GFP_KERNEL);
527         if(!dma_coherent){
528                 printk(KERN_NOTICE "arcmsr%d: dma_alloc_coherent got error\n", acb->host->host_no);
529                 return -ENOMEM;
530         }
531         acb->dma_coherent = dma_coherent;
532         acb->dma_coherent_handle = dma_coherent_handle;
533         memset(dma_coherent, 0, acb->uncache_size);
534         ccb_tmp = dma_coherent;
535         acb->vir2phy_offset = (unsigned long)dma_coherent - (unsigned long)dma_coherent_handle;
536         for(i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++){
537                 cdb_phyaddr = dma_coherent_handle + offsetof(struct CommandControlBlock, arcmsr_cdb);
538                 switch (acb->adapter_type) {
539                 case ACB_ADAPTER_TYPE_A:
540                 case ACB_ADAPTER_TYPE_B:
541                         ccb_tmp->cdb_phyaddr = cdb_phyaddr >> 5;
542                         break;
543                 case ACB_ADAPTER_TYPE_C:
544                 case ACB_ADAPTER_TYPE_D:
545                         ccb_tmp->cdb_phyaddr = cdb_phyaddr;
546                         break;
547                 }
548                 acb->pccb_pool[i] = ccb_tmp;
549                 ccb_tmp->acb = acb;
550                 INIT_LIST_HEAD(&ccb_tmp->list);
551                 list_add_tail(&ccb_tmp->list, &acb->ccb_free_list);
552                 ccb_tmp = (struct CommandControlBlock *)((unsigned long)ccb_tmp + roundup_ccbsize);
553                 dma_coherent_handle = dma_coherent_handle + roundup_ccbsize;
554         }
555         return 0;
556 }
557 
558 static void arcmsr_message_isr_bh_fn(struct work_struct *work) 
559 {
560         struct AdapterControlBlock *acb = container_of(work,
561                 struct AdapterControlBlock, arcmsr_do_message_isr_bh);
562         char *acb_dev_map = (char *)acb->device_map;
563         uint32_t __iomem *signature = NULL;
564         char __iomem *devicemap = NULL;
565         int target, lun;
566         struct scsi_device *psdev;
567         char diff, temp;
568 
569         switch (acb->adapter_type) {
570         case ACB_ADAPTER_TYPE_A: {
571                 struct MessageUnit_A __iomem *reg  = acb->pmuA;
572 
573                 signature = (uint32_t __iomem *)(&reg->message_rwbuffer[0]);
574                 devicemap = (char __iomem *)(&reg->message_rwbuffer[21]);
575                 break;
576         }
577         case ACB_ADAPTER_TYPE_B: {
578                 struct MessageUnit_B *reg  = acb->pmuB;
579 
580                 signature = (uint32_t __iomem *)(&reg->message_rwbuffer[0]);
581                 devicemap = (char __iomem *)(&reg->message_rwbuffer[21]);
582                 break;
583         }
584         case ACB_ADAPTER_TYPE_C: {
585                 struct MessageUnit_C __iomem *reg  = acb->pmuC;
586 
587                 signature = (uint32_t __iomem *)(&reg->msgcode_rwbuffer[0]);
588                 devicemap = (char __iomem *)(&reg->msgcode_rwbuffer[21]);
589                 break;
590         }
591         case ACB_ADAPTER_TYPE_D: {
592                 struct MessageUnit_D *reg  = acb->pmuD;
593 
594                 signature = (uint32_t __iomem *)(&reg->msgcode_rwbuffer[0]);
595                 devicemap = (char __iomem *)(&reg->msgcode_rwbuffer[21]);
596                 break;
597         }
598         }
599         atomic_inc(&acb->rq_map_token);
600         if (readl(signature) != ARCMSR_SIGNATURE_GET_CONFIG)
601                 return;
602         for (target = 0; target < ARCMSR_MAX_TARGETID - 1;
603                 target++) {
604                 temp = readb(devicemap);
605                 diff = (*acb_dev_map) ^ temp;
606                 if (diff != 0) {
607                         *acb_dev_map = temp;
608                         for (lun = 0; lun < ARCMSR_MAX_TARGETLUN;
609                                 lun++) {
610                                 if ((diff & 0x01) == 1 &&
611                                         (temp & 0x01) == 1) {
612                                         scsi_add_device(acb->host,
613                                                 0, target, lun);
614                                 } else if ((diff & 0x01) == 1
615                                         && (temp & 0x01) == 0) {
616                                         psdev = scsi_device_lookup(acb->host,
617                                                 0, target, lun);
618                                         if (psdev != NULL) {
619                                                 scsi_remove_device(psdev);
620                                                 scsi_device_put(psdev);
621                                         }
622                                 }
623                                 temp >>= 1;
624                                 diff >>= 1;
625                         }
626                 }
627                 devicemap++;
628                 acb_dev_map++;
629         }
630 }
631 
632 static int
633 arcmsr_request_irq(struct pci_dev *pdev, struct AdapterControlBlock *acb)
634 {
635         int     i, j, r;
636         struct msix_entry entries[ARCMST_NUM_MSIX_VECTORS];
637 
638         for (i = 0; i < ARCMST_NUM_MSIX_VECTORS; i++)
639                 entries[i].entry = i;
640         r = pci_enable_msix_range(pdev, entries, 1, ARCMST_NUM_MSIX_VECTORS);
641         if (r < 0)
642                 goto msi_int;
643         acb->msix_vector_count = r;
644         for (i = 0; i < r; i++) {
645                 if (request_irq(entries[i].vector,
646                         arcmsr_do_interrupt, 0, "arcmsr", acb)) {
647                         pr_warn("arcmsr%d: request_irq =%d failed!\n",
648                                 acb->host->host_no, entries[i].vector);
649                         for (j = 0 ; j < i ; j++)
650                                 free_irq(entries[j].vector, acb);
651                         pci_disable_msix(pdev);
652                         goto msi_int;
653                 }
654                 acb->entries[i] = entries[i];
655         }
656         acb->acb_flags |= ACB_F_MSIX_ENABLED;
657         pr_info("arcmsr%d: msi-x enabled\n", acb->host->host_no);
658         return SUCCESS;
659 msi_int:
660         if (pci_enable_msi_exact(pdev, 1) < 0)
661                 goto legacy_int;
662         if (request_irq(pdev->irq, arcmsr_do_interrupt,
663                 IRQF_SHARED, "arcmsr", acb)) {
664                 pr_warn("arcmsr%d: request_irq =%d failed!\n",
665                         acb->host->host_no, pdev->irq);
666                 pci_disable_msi(pdev);
667                 goto legacy_int;
668         }
669         acb->acb_flags |= ACB_F_MSI_ENABLED;
670         pr_info("arcmsr%d: msi enabled\n", acb->host->host_no);
671         return SUCCESS;
672 legacy_int:
673         if (request_irq(pdev->irq, arcmsr_do_interrupt,
674                 IRQF_SHARED, "arcmsr", acb)) {
675                 pr_warn("arcmsr%d: request_irq = %d failed!\n",
676                         acb->host->host_no, pdev->irq);
677                 return FAILED;
678         }
679         return SUCCESS;
680 }
681 
682 static int arcmsr_probe(struct pci_dev *pdev, const struct pci_device_id *id)
683 {
684         struct Scsi_Host *host;
685         struct AdapterControlBlock *acb;
686         uint8_t bus,dev_fun;
687         int error;
688         error = pci_enable_device(pdev);
689         if(error){
690                 return -ENODEV;
691         }
692         host = scsi_host_alloc(&arcmsr_scsi_host_template, sizeof(struct AdapterControlBlock));
693         if(!host){
694                 goto pci_disable_dev;
695         }
696         error = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
697         if(error){
698                 error = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
699                 if(error){
700                         printk(KERN_WARNING
701                                "scsi%d: No suitable DMA mask available\n",
702                                host->host_no);
703                         goto scsi_host_release;
704                 }
705         }
706         init_waitqueue_head(&wait_q);
707         bus = pdev->bus->number;
708         dev_fun = pdev->devfn;
709         acb = (struct AdapterControlBlock *) host->hostdata;
710         memset(acb,0,sizeof(struct AdapterControlBlock));
711         acb->pdev = pdev;
712         acb->host = host;
713         host->max_lun = ARCMSR_MAX_TARGETLUN;
714         host->max_id = ARCMSR_MAX_TARGETID;             /*16:8*/
715         host->max_cmd_len = 16;                         /*this is issue of 64bit LBA ,over 2T byte*/
716         host->can_queue = ARCMSR_MAX_OUTSTANDING_CMD;
717         host->cmd_per_lun = ARCMSR_MAX_CMD_PERLUN;          
718         host->this_id = ARCMSR_SCSI_INITIATOR_ID;
719         host->unique_id = (bus << 8) | dev_fun;
720         pci_set_drvdata(pdev, host);
721         pci_set_master(pdev);
722         error = pci_request_regions(pdev, "arcmsr");
723         if(error){
724                 goto scsi_host_release;
725         }
726         spin_lock_init(&acb->eh_lock);
727         spin_lock_init(&acb->ccblist_lock);
728         spin_lock_init(&acb->postq_lock);
729         spin_lock_init(&acb->doneq_lock);
730         spin_lock_init(&acb->rqbuffer_lock);
731         spin_lock_init(&acb->wqbuffer_lock);
732         acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
733                         ACB_F_MESSAGE_RQBUFFER_CLEARED |
734                         ACB_F_MESSAGE_WQBUFFER_READED);
735         acb->acb_flags &= ~ACB_F_SCSISTOPADAPTER;
736         INIT_LIST_HEAD(&acb->ccb_free_list);
737         acb->adapter_type = id->driver_data;
738         error = arcmsr_remap_pciregion(acb);
739         if(!error){
740                 goto pci_release_regs;
741         }
742         error = arcmsr_get_firmware_spec(acb);
743         if(!error){
744                 goto unmap_pci_region;
745         }
746         error = arcmsr_alloc_ccb_pool(acb);
747         if(error){
748                 goto free_hbb_mu;
749         }
750         error = scsi_add_host(host, &pdev->dev);
751         if(error){
752                 goto free_ccb_pool;
753         }
754         if (arcmsr_request_irq(pdev, acb) == FAILED)
755                 goto scsi_host_remove;
756         arcmsr_iop_init(acb);
757         INIT_WORK(&acb->arcmsr_do_message_isr_bh, arcmsr_message_isr_bh_fn);
758         atomic_set(&acb->rq_map_token, 16);
759         atomic_set(&acb->ante_token_value, 16);
760         acb->fw_flag = FW_NORMAL;
761         init_timer(&acb->eternal_timer);
762         acb->eternal_timer.expires = jiffies + msecs_to_jiffies(6 * HZ);
763         acb->eternal_timer.data = (unsigned long) acb;
764         acb->eternal_timer.function = &arcmsr_request_device_map;
765         add_timer(&acb->eternal_timer);
766         if(arcmsr_alloc_sysfs_attr(acb))
767                 goto out_free_sysfs;
768         scsi_scan_host(host);
769         return 0;
770 out_free_sysfs:
771         del_timer_sync(&acb->eternal_timer);
772         flush_work(&acb->arcmsr_do_message_isr_bh);
773         arcmsr_stop_adapter_bgrb(acb);
774         arcmsr_flush_adapter_cache(acb);
775         arcmsr_free_irq(pdev, acb);
776 scsi_host_remove:
777         scsi_remove_host(host);
778 free_ccb_pool:
779         arcmsr_free_ccb_pool(acb);
780 free_hbb_mu:
781         arcmsr_free_mu(acb);
782 unmap_pci_region:
783         arcmsr_unmap_pciregion(acb);
784 pci_release_regs:
785         pci_release_regions(pdev);
786 scsi_host_release:
787         scsi_host_put(host);
788 pci_disable_dev:
789         pci_disable_device(pdev);
790         return -ENODEV;
791 }
792 
793 static void arcmsr_free_irq(struct pci_dev *pdev,
794                 struct AdapterControlBlock *acb)
795 {
796         int i;
797 
798         if (acb->acb_flags & ACB_F_MSI_ENABLED) {
799                 free_irq(pdev->irq, acb);
800                 pci_disable_msi(pdev);
801         } else if (acb->acb_flags & ACB_F_MSIX_ENABLED) {
802                 for (i = 0; i < acb->msix_vector_count; i++)
803                         free_irq(acb->entries[i].vector, acb);
804                 pci_disable_msix(pdev);
805         } else
806                 free_irq(pdev->irq, acb);
807 }
808 
809 static int arcmsr_suspend(struct pci_dev *pdev, pm_message_t state)
810 {
811         uint32_t intmask_org;
812         struct Scsi_Host *host = pci_get_drvdata(pdev);
813         struct AdapterControlBlock *acb =
814                 (struct AdapterControlBlock *)host->hostdata;
815 
816         intmask_org = arcmsr_disable_outbound_ints(acb);
817         arcmsr_free_irq(pdev, acb);
818         del_timer_sync(&acb->eternal_timer);
819         flush_work(&acb->arcmsr_do_message_isr_bh);
820         arcmsr_stop_adapter_bgrb(acb);
821         arcmsr_flush_adapter_cache(acb);
822         pci_set_drvdata(pdev, host);
823         pci_save_state(pdev);
824         pci_disable_device(pdev);
825         pci_set_power_state(pdev, pci_choose_state(pdev, state));
826         return 0;
827 }
828 
829 static int arcmsr_resume(struct pci_dev *pdev)
830 {
831         int error;
832         struct Scsi_Host *host = pci_get_drvdata(pdev);
833         struct AdapterControlBlock *acb =
834                 (struct AdapterControlBlock *)host->hostdata;
835 
836         pci_set_power_state(pdev, PCI_D0);
837         pci_enable_wake(pdev, PCI_D0, 0);
838         pci_restore_state(pdev);
839         if (pci_enable_device(pdev)) {
840                 pr_warn("%s: pci_enable_device error\n", __func__);
841                 return -ENODEV;
842         }
843         error = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
844         if (error) {
845                 error = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
846                 if (error) {
847                         pr_warn("scsi%d: No suitable DMA mask available\n",
848                                host->host_no);
849                         goto controller_unregister;
850                 }
851         }
852         pci_set_master(pdev);
853         if (arcmsr_request_irq(pdev, acb) == FAILED)
854                 goto controller_stop;
855         arcmsr_iop_init(acb);
856         INIT_WORK(&acb->arcmsr_do_message_isr_bh, arcmsr_message_isr_bh_fn);
857         atomic_set(&acb->rq_map_token, 16);
858         atomic_set(&acb->ante_token_value, 16);
859         acb->fw_flag = FW_NORMAL;
860         init_timer(&acb->eternal_timer);
861         acb->eternal_timer.expires = jiffies + msecs_to_jiffies(6 * HZ);
862         acb->eternal_timer.data = (unsigned long) acb;
863         acb->eternal_timer.function = &arcmsr_request_device_map;
864         add_timer(&acb->eternal_timer);
865         return 0;
866 controller_stop:
867         arcmsr_stop_adapter_bgrb(acb);
868         arcmsr_flush_adapter_cache(acb);
869 controller_unregister:
870         scsi_remove_host(host);
871         arcmsr_free_ccb_pool(acb);
872         arcmsr_unmap_pciregion(acb);
873         pci_release_regions(pdev);
874         scsi_host_put(host);
875         pci_disable_device(pdev);
876         return -ENODEV;
877 }
878 
879 static uint8_t arcmsr_hbaA_abort_allcmd(struct AdapterControlBlock *acb)
880 {
881         struct MessageUnit_A __iomem *reg = acb->pmuA;
882         writel(ARCMSR_INBOUND_MESG0_ABORT_CMD, &reg->inbound_msgaddr0);
883         if (!arcmsr_hbaA_wait_msgint_ready(acb)) {
884                 printk(KERN_NOTICE
885                         "arcmsr%d: wait 'abort all outstanding command' timeout\n"
886                         , acb->host->host_no);
887                 return false;
888         }
889         return true;
890 }
891 
892 static uint8_t arcmsr_hbaB_abort_allcmd(struct AdapterControlBlock *acb)
893 {
894         struct MessageUnit_B *reg = acb->pmuB;
895 
896         writel(ARCMSR_MESSAGE_ABORT_CMD, reg->drv2iop_doorbell);
897         if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
898                 printk(KERN_NOTICE
899                         "arcmsr%d: wait 'abort all outstanding command' timeout\n"
900                         , acb->host->host_no);
901                 return false;
902         }
903         return true;
904 }
905 static uint8_t arcmsr_hbaC_abort_allcmd(struct AdapterControlBlock *pACB)
906 {
907         struct MessageUnit_C __iomem *reg = pACB->pmuC;
908         writel(ARCMSR_INBOUND_MESG0_ABORT_CMD, &reg->inbound_msgaddr0);
909         writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
910         if (!arcmsr_hbaC_wait_msgint_ready(pACB)) {
911                 printk(KERN_NOTICE
912                         "arcmsr%d: wait 'abort all outstanding command' timeout\n"
913                         , pACB->host->host_no);
914                 return false;
915         }
916         return true;
917 }
918 
919 static uint8_t arcmsr_hbaD_abort_allcmd(struct AdapterControlBlock *pACB)
920 {
921         struct MessageUnit_D *reg = pACB->pmuD;
922 
923         writel(ARCMSR_INBOUND_MESG0_ABORT_CMD, reg->inbound_msgaddr0);
924         if (!arcmsr_hbaD_wait_msgint_ready(pACB)) {
925                 pr_notice("arcmsr%d: wait 'abort all outstanding "
926                         "command' timeout\n", pACB->host->host_no);
927                 return false;
928         }
929         return true;
930 }
931 
932 static uint8_t arcmsr_abort_allcmd(struct AdapterControlBlock *acb)
933 {
934         uint8_t rtnval = 0;
935         switch (acb->adapter_type) {
936         case ACB_ADAPTER_TYPE_A: {
937                 rtnval = arcmsr_hbaA_abort_allcmd(acb);
938                 }
939                 break;
940 
941         case ACB_ADAPTER_TYPE_B: {
942                 rtnval = arcmsr_hbaB_abort_allcmd(acb);
943                 }
944                 break;
945 
946         case ACB_ADAPTER_TYPE_C: {
947                 rtnval = arcmsr_hbaC_abort_allcmd(acb);
948                 }
949                 break;
950 
951         case ACB_ADAPTER_TYPE_D:
952                 rtnval = arcmsr_hbaD_abort_allcmd(acb);
953                 break;
954         }
955         return rtnval;
956 }
957 
958 static void arcmsr_pci_unmap_dma(struct CommandControlBlock *ccb)
959 {
960         struct scsi_cmnd *pcmd = ccb->pcmd;
961 
962         scsi_dma_unmap(pcmd);
963 }
964 
965 static void arcmsr_ccb_complete(struct CommandControlBlock *ccb)
966 {
967         struct AdapterControlBlock *acb = ccb->acb;
968         struct scsi_cmnd *pcmd = ccb->pcmd;
969         unsigned long flags;
970         atomic_dec(&acb->ccboutstandingcount);
971         arcmsr_pci_unmap_dma(ccb);
972         ccb->startdone = ARCMSR_CCB_DONE;
973         spin_lock_irqsave(&acb->ccblist_lock, flags);
974         list_add_tail(&ccb->list, &acb->ccb_free_list);
975         spin_unlock_irqrestore(&acb->ccblist_lock, flags);
976         pcmd->scsi_done(pcmd);
977 }
978 
979 static void arcmsr_report_sense_info(struct CommandControlBlock *ccb)
980 {
981 
982         struct scsi_cmnd *pcmd = ccb->pcmd;
983         struct SENSE_DATA *sensebuffer = (struct SENSE_DATA *)pcmd->sense_buffer;
984         pcmd->result = DID_OK << 16;
985         if (sensebuffer) {
986                 int sense_data_length =
987                         sizeof(struct SENSE_DATA) < SCSI_SENSE_BUFFERSIZE
988                         ? sizeof(struct SENSE_DATA) : SCSI_SENSE_BUFFERSIZE;
989                 memset(sensebuffer, 0, SCSI_SENSE_BUFFERSIZE);
990                 memcpy(sensebuffer, ccb->arcmsr_cdb.SenseData, sense_data_length);
991                 sensebuffer->ErrorCode = SCSI_SENSE_CURRENT_ERRORS;
992                 sensebuffer->Valid = 1;
993         }
994 }
995 
996 static u32 arcmsr_disable_outbound_ints(struct AdapterControlBlock *acb)
997 {
998         u32 orig_mask = 0;
999         switch (acb->adapter_type) {    
1000         case ACB_ADAPTER_TYPE_A : {
1001                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1002                 orig_mask = readl(&reg->outbound_intmask);
1003                 writel(orig_mask|ARCMSR_MU_OUTBOUND_ALL_INTMASKENABLE, \
1004                                                 &reg->outbound_intmask);
1005                 }
1006                 break;
1007         case ACB_ADAPTER_TYPE_B : {
1008                 struct MessageUnit_B *reg = acb->pmuB;
1009                 orig_mask = readl(reg->iop2drv_doorbell_mask);
1010                 writel(0, reg->iop2drv_doorbell_mask);
1011                 }
1012                 break;
1013         case ACB_ADAPTER_TYPE_C:{
1014                 struct MessageUnit_C __iomem *reg = acb->pmuC;
1015                 /* disable all outbound interrupt */
1016                 orig_mask = readl(&reg->host_int_mask); /* disable outbound message0 int */
1017                 writel(orig_mask|ARCMSR_HBCMU_ALL_INTMASKENABLE, &reg->host_int_mask);
1018                 }
1019                 break;
1020         case ACB_ADAPTER_TYPE_D: {
1021                 struct MessageUnit_D *reg = acb->pmuD;
1022                 /* disable all outbound interrupt */
1023                 writel(ARCMSR_ARC1214_ALL_INT_DISABLE, reg->pcief0_int_enable);
1024                 }
1025                 break;
1026         }
1027         return orig_mask;
1028 }
1029 
1030 static void arcmsr_report_ccb_state(struct AdapterControlBlock *acb, 
1031                         struct CommandControlBlock *ccb, bool error)
1032 {
1033         uint8_t id, lun;
1034         id = ccb->pcmd->device->id;
1035         lun = ccb->pcmd->device->lun;
1036         if (!error) {
1037                 if (acb->devstate[id][lun] == ARECA_RAID_GONE)
1038                         acb->devstate[id][lun] = ARECA_RAID_GOOD;
1039                 ccb->pcmd->result = DID_OK << 16;
1040                 arcmsr_ccb_complete(ccb);
1041         }else{
1042                 switch (ccb->arcmsr_cdb.DeviceStatus) {
1043                 case ARCMSR_DEV_SELECT_TIMEOUT: {
1044                         acb->devstate[id][lun] = ARECA_RAID_GONE;
1045                         ccb->pcmd->result = DID_NO_CONNECT << 16;
1046                         arcmsr_ccb_complete(ccb);
1047                         }
1048                         break;
1049 
1050                 case ARCMSR_DEV_ABORTED:
1051 
1052                 case ARCMSR_DEV_INIT_FAIL: {
1053                         acb->devstate[id][lun] = ARECA_RAID_GONE;
1054                         ccb->pcmd->result = DID_BAD_TARGET << 16;
1055                         arcmsr_ccb_complete(ccb);
1056                         }
1057                         break;
1058 
1059                 case ARCMSR_DEV_CHECK_CONDITION: {
1060                         acb->devstate[id][lun] = ARECA_RAID_GOOD;
1061                         arcmsr_report_sense_info(ccb);
1062                         arcmsr_ccb_complete(ccb);
1063                         }
1064                         break;
1065 
1066                 default:
1067                         printk(KERN_NOTICE
1068                                 "arcmsr%d: scsi id = %d lun = %d isr get command error done, \
1069                                 but got unknown DeviceStatus = 0x%x \n"
1070                                 , acb->host->host_no
1071                                 , id
1072                                 , lun
1073                                 , ccb->arcmsr_cdb.DeviceStatus);
1074                                 acb->devstate[id][lun] = ARECA_RAID_GONE;
1075                                 ccb->pcmd->result = DID_NO_CONNECT << 16;
1076                                 arcmsr_ccb_complete(ccb);
1077                         break;
1078                 }
1079         }
1080 }
1081 
1082 static void arcmsr_drain_donequeue(struct AdapterControlBlock *acb, struct CommandControlBlock *pCCB, bool error)
1083 {
1084         int id, lun;
1085         if ((pCCB->acb != acb) || (pCCB->startdone != ARCMSR_CCB_START)) {
1086                 if (pCCB->startdone == ARCMSR_CCB_ABORTED) {
1087                         struct scsi_cmnd *abortcmd = pCCB->pcmd;
1088                         if (abortcmd) {
1089                                 id = abortcmd->device->id;
1090                                 lun = abortcmd->device->lun;                            
1091                                 abortcmd->result |= DID_ABORT << 16;
1092                                 arcmsr_ccb_complete(pCCB);
1093                                 printk(KERN_NOTICE "arcmsr%d: pCCB ='0x%p' isr got aborted command \n",
1094                                 acb->host->host_no, pCCB);
1095                         }
1096                         return;
1097                 }
1098                 printk(KERN_NOTICE "arcmsr%d: isr get an illegal ccb command \
1099                                 done acb = '0x%p'"
1100                                 "ccb = '0x%p' ccbacb = '0x%p' startdone = 0x%x"
1101                                 " ccboutstandingcount = %d \n"
1102                                 , acb->host->host_no
1103                                 , acb
1104                                 , pCCB
1105                                 , pCCB->acb
1106                                 , pCCB->startdone
1107                                 , atomic_read(&acb->ccboutstandingcount));
1108                   return;
1109         }
1110         arcmsr_report_ccb_state(acb, pCCB, error);
1111 }
1112 
1113 static void arcmsr_done4abort_postqueue(struct AdapterControlBlock *acb)
1114 {
1115         int i = 0;
1116         uint32_t flag_ccb, ccb_cdb_phy;
1117         struct ARCMSR_CDB *pARCMSR_CDB;
1118         bool error;
1119         struct CommandControlBlock *pCCB;
1120         switch (acb->adapter_type) {
1121 
1122         case ACB_ADAPTER_TYPE_A: {
1123                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1124                 uint32_t outbound_intstatus;
1125                 outbound_intstatus = readl(&reg->outbound_intstatus) &
1126                                         acb->outbound_int_enable;
1127                 /*clear and abort all outbound posted Q*/
1128                 writel(outbound_intstatus, &reg->outbound_intstatus);/*clear interrupt*/
1129                 while(((flag_ccb = readl(&reg->outbound_queueport)) != 0xFFFFFFFF)
1130                                 && (i++ < ARCMSR_MAX_OUTSTANDING_CMD)) {
1131                         pARCMSR_CDB = (struct ARCMSR_CDB *)(acb->vir2phy_offset + (flag_ccb << 5));/*frame must be 32 bytes aligned*/
1132                         pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
1133                         error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
1134                         arcmsr_drain_donequeue(acb, pCCB, error);
1135                 }
1136                 }
1137                 break;
1138 
1139         case ACB_ADAPTER_TYPE_B: {
1140                 struct MessageUnit_B *reg = acb->pmuB;
1141                 /*clear all outbound posted Q*/
1142                 writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell); /* clear doorbell interrupt */
1143                 for (i = 0; i < ARCMSR_MAX_HBB_POSTQUEUE; i++) {
1144                         flag_ccb = reg->done_qbuffer[i];
1145                         if (flag_ccb != 0) {
1146                                 reg->done_qbuffer[i] = 0;
1147                                 pARCMSR_CDB = (struct ARCMSR_CDB *)(acb->vir2phy_offset+(flag_ccb << 5));/*frame must be 32 bytes aligned*/
1148                                 pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
1149                                 error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
1150                                 arcmsr_drain_donequeue(acb, pCCB, error);
1151                         }
1152                         reg->post_qbuffer[i] = 0;
1153                 }
1154                 reg->doneq_index = 0;
1155                 reg->postq_index = 0;
1156                 }
1157                 break;
1158         case ACB_ADAPTER_TYPE_C: {
1159                 struct MessageUnit_C __iomem *reg = acb->pmuC;
1160                 while ((readl(&reg->host_int_status) & ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR) && (i++ < ARCMSR_MAX_OUTSTANDING_CMD)) {
1161                         /*need to do*/
1162                         flag_ccb = readl(&reg->outbound_queueport_low);
1163                         ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);
1164                         pARCMSR_CDB = (struct  ARCMSR_CDB *)(acb->vir2phy_offset+ccb_cdb_phy);/*frame must be 32 bytes aligned*/
1165                         pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
1166                         error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1) ? true : false;
1167                         arcmsr_drain_donequeue(acb, pCCB, error);
1168                 }
1169                 }
1170                 break;
1171         case ACB_ADAPTER_TYPE_D: {
1172                 struct MessageUnit_D  *pmu = acb->pmuD;
1173                 uint32_t outbound_write_pointer;
1174                 uint32_t doneq_index, index_stripped, addressLow, residual, toggle;
1175                 unsigned long flags;
1176 
1177                 residual = atomic_read(&acb->ccboutstandingcount);
1178                 for (i = 0; i < residual; i++) {
1179                         spin_lock_irqsave(&acb->doneq_lock, flags);
1180                         outbound_write_pointer =
1181                                 pmu->done_qbuffer[0].addressLow + 1;
1182                         doneq_index = pmu->doneq_index;
1183                         if ((doneq_index & 0xFFF) !=
1184                                 (outbound_write_pointer & 0xFFF)) {
1185                                 toggle = doneq_index & 0x4000;
1186                                 index_stripped = (doneq_index & 0xFFF) + 1;
1187                                 index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
1188                                 pmu->doneq_index = index_stripped ? (index_stripped | toggle) :
1189                                         ((toggle ^ 0x4000) + 1);
1190                                 doneq_index = pmu->doneq_index;
1191                                 spin_unlock_irqrestore(&acb->doneq_lock, flags);
1192                                 addressLow = pmu->done_qbuffer[doneq_index &
1193                                         0xFFF].addressLow;
1194                                 ccb_cdb_phy = (addressLow & 0xFFFFFFF0);
1195                                 pARCMSR_CDB = (struct  ARCMSR_CDB *)
1196                                         (acb->vir2phy_offset + ccb_cdb_phy);
1197                                 pCCB = container_of(pARCMSR_CDB,
1198                                         struct CommandControlBlock, arcmsr_cdb);
1199                                 error = (addressLow &
1200                                         ARCMSR_CCBREPLY_FLAG_ERROR_MODE1) ?
1201                                         true : false;
1202                                 arcmsr_drain_donequeue(acb, pCCB, error);
1203                                 writel(doneq_index,
1204                                         pmu->outboundlist_read_pointer);
1205                         } else {
1206                                 spin_unlock_irqrestore(&acb->doneq_lock, flags);
1207                                 mdelay(10);
1208                         }
1209                 }
1210                 pmu->postq_index = 0;
1211                 pmu->doneq_index = 0x40FF;
1212                 }
1213                 break;
1214         }
1215 }
1216 
1217 static void arcmsr_remove(struct pci_dev *pdev)
1218 {
1219         struct Scsi_Host *host = pci_get_drvdata(pdev);
1220         struct AdapterControlBlock *acb =
1221                 (struct AdapterControlBlock *) host->hostdata;
1222         int poll_count = 0;
1223         arcmsr_free_sysfs_attr(acb);
1224         scsi_remove_host(host);
1225         flush_work(&acb->arcmsr_do_message_isr_bh);
1226         del_timer_sync(&acb->eternal_timer);
1227         arcmsr_disable_outbound_ints(acb);
1228         arcmsr_stop_adapter_bgrb(acb);
1229         arcmsr_flush_adapter_cache(acb);        
1230         acb->acb_flags |= ACB_F_SCSISTOPADAPTER;
1231         acb->acb_flags &= ~ACB_F_IOP_INITED;
1232 
1233         for (poll_count = 0; poll_count < ARCMSR_MAX_OUTSTANDING_CMD; poll_count++){
1234                 if (!atomic_read(&acb->ccboutstandingcount))
1235                         break;
1236                 arcmsr_interrupt(acb);/* FIXME: need spinlock */
1237                 msleep(25);
1238         }
1239 
1240         if (atomic_read(&acb->ccboutstandingcount)) {
1241                 int i;
1242 
1243                 arcmsr_abort_allcmd(acb);
1244                 arcmsr_done4abort_postqueue(acb);
1245                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
1246                         struct CommandControlBlock *ccb = acb->pccb_pool[i];
1247                         if (ccb->startdone == ARCMSR_CCB_START) {
1248                                 ccb->startdone = ARCMSR_CCB_ABORTED;
1249                                 ccb->pcmd->result = DID_ABORT << 16;
1250                                 arcmsr_ccb_complete(ccb);
1251                         }
1252                 }
1253         }
1254         arcmsr_free_irq(pdev, acb);
1255         arcmsr_free_ccb_pool(acb);
1256         arcmsr_free_mu(acb);
1257         arcmsr_unmap_pciregion(acb);
1258         pci_release_regions(pdev);
1259         scsi_host_put(host);
1260         pci_disable_device(pdev);
1261 }
1262 
1263 static void arcmsr_shutdown(struct pci_dev *pdev)
1264 {
1265         struct Scsi_Host *host = pci_get_drvdata(pdev);
1266         struct AdapterControlBlock *acb =
1267                 (struct AdapterControlBlock *)host->hostdata;
1268         del_timer_sync(&acb->eternal_timer);
1269         arcmsr_disable_outbound_ints(acb);
1270         arcmsr_free_irq(pdev, acb);
1271         flush_work(&acb->arcmsr_do_message_isr_bh);
1272         arcmsr_stop_adapter_bgrb(acb);
1273         arcmsr_flush_adapter_cache(acb);
1274 }
1275 
1276 static int arcmsr_module_init(void)
1277 {
1278         int error = 0;
1279         error = pci_register_driver(&arcmsr_pci_driver);
1280         return error;
1281 }
1282 
1283 static void arcmsr_module_exit(void)
1284 {
1285         pci_unregister_driver(&arcmsr_pci_driver);
1286 }
1287 module_init(arcmsr_module_init);
1288 module_exit(arcmsr_module_exit);
1289 
1290 static void arcmsr_enable_outbound_ints(struct AdapterControlBlock *acb,
1291                                                 u32 intmask_org)
1292 {
1293         u32 mask;
1294         switch (acb->adapter_type) {
1295 
1296         case ACB_ADAPTER_TYPE_A: {
1297                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1298                 mask = intmask_org & ~(ARCMSR_MU_OUTBOUND_POSTQUEUE_INTMASKENABLE |
1299                              ARCMSR_MU_OUTBOUND_DOORBELL_INTMASKENABLE|
1300                              ARCMSR_MU_OUTBOUND_MESSAGE0_INTMASKENABLE);
1301                 writel(mask, &reg->outbound_intmask);
1302                 acb->outbound_int_enable = ~(intmask_org & mask) & 0x000000ff;
1303                 }
1304                 break;
1305 
1306         case ACB_ADAPTER_TYPE_B: {
1307                 struct MessageUnit_B *reg = acb->pmuB;
1308                 mask = intmask_org | (ARCMSR_IOP2DRV_DATA_WRITE_OK |
1309                         ARCMSR_IOP2DRV_DATA_READ_OK |
1310                         ARCMSR_IOP2DRV_CDB_DONE |
1311                         ARCMSR_IOP2DRV_MESSAGE_CMD_DONE);
1312                 writel(mask, reg->iop2drv_doorbell_mask);
1313                 acb->outbound_int_enable = (intmask_org | mask) & 0x0000000f;
1314                 }
1315                 break;
1316         case ACB_ADAPTER_TYPE_C: {
1317                 struct MessageUnit_C __iomem *reg = acb->pmuC;
1318                 mask = ~(ARCMSR_HBCMU_UTILITY_A_ISR_MASK | ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR_MASK|ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR_MASK);
1319                 writel(intmask_org & mask, &reg->host_int_mask);
1320                 acb->outbound_int_enable = ~(intmask_org & mask) & 0x0000000f;
1321                 }
1322                 break;
1323         case ACB_ADAPTER_TYPE_D: {
1324                 struct MessageUnit_D *reg = acb->pmuD;
1325 
1326                 mask = ARCMSR_ARC1214_ALL_INT_ENABLE;
1327                 writel(intmask_org | mask, reg->pcief0_int_enable);
1328                 break;
1329                 }
1330         }
1331 }
1332 
1333 static int arcmsr_build_ccb(struct AdapterControlBlock *acb,
1334         struct CommandControlBlock *ccb, struct scsi_cmnd *pcmd)
1335 {
1336         struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
1337         int8_t *psge = (int8_t *)&arcmsr_cdb->u;
1338         __le32 address_lo, address_hi;
1339         int arccdbsize = 0x30;
1340         __le32 length = 0;
1341         int i;
1342         struct scatterlist *sg;
1343         int nseg;
1344         ccb->pcmd = pcmd;
1345         memset(arcmsr_cdb, 0, sizeof(struct ARCMSR_CDB));
1346         arcmsr_cdb->TargetID = pcmd->device->id;
1347         arcmsr_cdb->LUN = pcmd->device->lun;
1348         arcmsr_cdb->Function = 1;
1349         arcmsr_cdb->msgContext = 0;
1350         memcpy(arcmsr_cdb->Cdb, pcmd->cmnd, pcmd->cmd_len);
1351 
1352         nseg = scsi_dma_map(pcmd);
1353         if (unlikely(nseg > acb->host->sg_tablesize || nseg < 0))
1354                 return FAILED;
1355         scsi_for_each_sg(pcmd, sg, nseg, i) {
1356                 /* Get the physical address of the current data pointer */
1357                 length = cpu_to_le32(sg_dma_len(sg));
1358                 address_lo = cpu_to_le32(dma_addr_lo32(sg_dma_address(sg)));
1359                 address_hi = cpu_to_le32(dma_addr_hi32(sg_dma_address(sg)));
1360                 if (address_hi == 0) {
1361                         struct SG32ENTRY *pdma_sg = (struct SG32ENTRY *)psge;
1362 
1363                         pdma_sg->address = address_lo;
1364                         pdma_sg->length = length;
1365                         psge += sizeof (struct SG32ENTRY);
1366                         arccdbsize += sizeof (struct SG32ENTRY);
1367                 } else {
1368                         struct SG64ENTRY *pdma_sg = (struct SG64ENTRY *)psge;
1369 
1370                         pdma_sg->addresshigh = address_hi;
1371                         pdma_sg->address = address_lo;
1372                         pdma_sg->length = length|cpu_to_le32(IS_SG64_ADDR);
1373                         psge += sizeof (struct SG64ENTRY);
1374                         arccdbsize += sizeof (struct SG64ENTRY);
1375                 }
1376         }
1377         arcmsr_cdb->sgcount = (uint8_t)nseg;
1378         arcmsr_cdb->DataLength = scsi_bufflen(pcmd);
1379         arcmsr_cdb->msgPages = arccdbsize/0x100 + (arccdbsize % 0x100 ? 1 : 0);
1380         if ( arccdbsize > 256)
1381                 arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_SGL_BSIZE;
1382         if (pcmd->sc_data_direction == DMA_TO_DEVICE)
1383                 arcmsr_cdb->Flags |= ARCMSR_CDB_FLAG_WRITE;
1384         ccb->arc_cdb_size = arccdbsize;
1385         return SUCCESS;
1386 }
1387 
1388 static void arcmsr_post_ccb(struct AdapterControlBlock *acb, struct CommandControlBlock *ccb)
1389 {
1390         uint32_t cdb_phyaddr = ccb->cdb_phyaddr;
1391         struct ARCMSR_CDB *arcmsr_cdb = (struct ARCMSR_CDB *)&ccb->arcmsr_cdb;
1392         atomic_inc(&acb->ccboutstandingcount);
1393         ccb->startdone = ARCMSR_CCB_START;
1394         switch (acb->adapter_type) {
1395         case ACB_ADAPTER_TYPE_A: {
1396                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1397 
1398                 if (arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE)
1399                         writel(cdb_phyaddr | ARCMSR_CCBPOST_FLAG_SGL_BSIZE,
1400                         &reg->inbound_queueport);
1401                 else
1402                         writel(cdb_phyaddr, &reg->inbound_queueport);
1403                 break;
1404         }
1405 
1406         case ACB_ADAPTER_TYPE_B: {
1407                 struct MessageUnit_B *reg = acb->pmuB;
1408                 uint32_t ending_index, index = reg->postq_index;
1409 
1410                 ending_index = ((index + 1) % ARCMSR_MAX_HBB_POSTQUEUE);
1411                 reg->post_qbuffer[ending_index] = 0;
1412                 if (arcmsr_cdb->Flags & ARCMSR_CDB_FLAG_SGL_BSIZE) {
1413                         reg->post_qbuffer[index] =
1414                                 cdb_phyaddr | ARCMSR_CCBPOST_FLAG_SGL_BSIZE;
1415                 } else {
1416                         reg->post_qbuffer[index] = cdb_phyaddr;
1417                 }
1418                 index++;
1419                 index %= ARCMSR_MAX_HBB_POSTQUEUE;/*if last index number set it to 0 */
1420                 reg->postq_index = index;
1421                 writel(ARCMSR_DRV2IOP_CDB_POSTED, reg->drv2iop_doorbell);
1422                 }
1423                 break;
1424         case ACB_ADAPTER_TYPE_C: {
1425                 struct MessageUnit_C __iomem *phbcmu = acb->pmuC;
1426                 uint32_t ccb_post_stamp, arc_cdb_size;
1427 
1428                 arc_cdb_size = (ccb->arc_cdb_size > 0x300) ? 0x300 : ccb->arc_cdb_size;
1429                 ccb_post_stamp = (cdb_phyaddr | ((arc_cdb_size - 1) >> 6) | 1);
1430                 if (acb->cdb_phyaddr_hi32) {
1431                         writel(acb->cdb_phyaddr_hi32, &phbcmu->inbound_queueport_high);
1432                         writel(ccb_post_stamp, &phbcmu->inbound_queueport_low);
1433                 } else {
1434                         writel(ccb_post_stamp, &phbcmu->inbound_queueport_low);
1435                 }
1436                 }
1437                 break;
1438         case ACB_ADAPTER_TYPE_D: {
1439                 struct MessageUnit_D  *pmu = acb->pmuD;
1440                 u16 index_stripped;
1441                 u16 postq_index, toggle;
1442                 unsigned long flags;
1443                 struct InBound_SRB *pinbound_srb;
1444 
1445                 spin_lock_irqsave(&acb->postq_lock, flags);
1446                 postq_index = pmu->postq_index;
1447                 pinbound_srb = (struct InBound_SRB *)&(pmu->post_qbuffer[postq_index & 0xFF]);
1448                 pinbound_srb->addressHigh = dma_addr_hi32(cdb_phyaddr);
1449                 pinbound_srb->addressLow = dma_addr_lo32(cdb_phyaddr);
1450                 pinbound_srb->length = ccb->arc_cdb_size >> 2;
1451                 arcmsr_cdb->msgContext = dma_addr_lo32(cdb_phyaddr);
1452                 toggle = postq_index & 0x4000;
1453                 index_stripped = postq_index + 1;
1454                 index_stripped &= (ARCMSR_MAX_ARC1214_POSTQUEUE - 1);
1455                 pmu->postq_index = index_stripped ? (index_stripped | toggle) :
1456                         (toggle ^ 0x4000);
1457                 writel(postq_index, pmu->inboundlist_write_pointer);
1458                 spin_unlock_irqrestore(&acb->postq_lock, flags);
1459                 break;
1460                 }
1461         }
1462 }
1463 
1464 static void arcmsr_hbaA_stop_bgrb(struct AdapterControlBlock *acb)
1465 {
1466         struct MessageUnit_A __iomem *reg = acb->pmuA;
1467         acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
1468         writel(ARCMSR_INBOUND_MESG0_STOP_BGRB, &reg->inbound_msgaddr0);
1469         if (!arcmsr_hbaA_wait_msgint_ready(acb)) {
1470                 printk(KERN_NOTICE
1471                         "arcmsr%d: wait 'stop adapter background rebulid' timeout\n"
1472                         , acb->host->host_no);
1473         }
1474 }
1475 
1476 static void arcmsr_hbaB_stop_bgrb(struct AdapterControlBlock *acb)
1477 {
1478         struct MessageUnit_B *reg = acb->pmuB;
1479         acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
1480         writel(ARCMSR_MESSAGE_STOP_BGRB, reg->drv2iop_doorbell);
1481 
1482         if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
1483                 printk(KERN_NOTICE
1484                         "arcmsr%d: wait 'stop adapter background rebulid' timeout\n"
1485                         , acb->host->host_no);
1486         }
1487 }
1488 
1489 static void arcmsr_hbaC_stop_bgrb(struct AdapterControlBlock *pACB)
1490 {
1491         struct MessageUnit_C __iomem *reg = pACB->pmuC;
1492         pACB->acb_flags &= ~ACB_F_MSG_START_BGRB;
1493         writel(ARCMSR_INBOUND_MESG0_STOP_BGRB, &reg->inbound_msgaddr0);
1494         writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
1495         if (!arcmsr_hbaC_wait_msgint_ready(pACB)) {
1496                 printk(KERN_NOTICE
1497                         "arcmsr%d: wait 'stop adapter background rebulid' timeout\n"
1498                         , pACB->host->host_no);
1499         }
1500         return;
1501 }
1502 
1503 static void arcmsr_hbaD_stop_bgrb(struct AdapterControlBlock *pACB)
1504 {
1505         struct MessageUnit_D *reg = pACB->pmuD;
1506 
1507         pACB->acb_flags &= ~ACB_F_MSG_START_BGRB;
1508         writel(ARCMSR_INBOUND_MESG0_STOP_BGRB, reg->inbound_msgaddr0);
1509         if (!arcmsr_hbaD_wait_msgint_ready(pACB))
1510                 pr_notice("arcmsr%d: wait 'stop adapter background rebulid' "
1511                         "timeout\n", pACB->host->host_no);
1512 }
1513 
1514 static void arcmsr_stop_adapter_bgrb(struct AdapterControlBlock *acb)
1515 {
1516         switch (acb->adapter_type) {
1517         case ACB_ADAPTER_TYPE_A: {
1518                 arcmsr_hbaA_stop_bgrb(acb);
1519                 }
1520                 break;
1521 
1522         case ACB_ADAPTER_TYPE_B: {
1523                 arcmsr_hbaB_stop_bgrb(acb);
1524                 }
1525                 break;
1526         case ACB_ADAPTER_TYPE_C: {
1527                 arcmsr_hbaC_stop_bgrb(acb);
1528                 }
1529                 break;
1530         case ACB_ADAPTER_TYPE_D:
1531                 arcmsr_hbaD_stop_bgrb(acb);
1532                 break;
1533         }
1534 }
1535 
1536 static void arcmsr_free_ccb_pool(struct AdapterControlBlock *acb)
1537 {
1538         dma_free_coherent(&acb->pdev->dev, acb->uncache_size, acb->dma_coherent, acb->dma_coherent_handle);
1539 }
1540 
1541 static void arcmsr_iop_message_read(struct AdapterControlBlock *acb)
1542 {
1543         switch (acb->adapter_type) {
1544         case ACB_ADAPTER_TYPE_A: {
1545                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1546                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
1547                 }
1548                 break;
1549 
1550         case ACB_ADAPTER_TYPE_B: {
1551                 struct MessageUnit_B *reg = acb->pmuB;
1552                 writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell);
1553                 }
1554                 break;
1555         case ACB_ADAPTER_TYPE_C: {
1556                 struct MessageUnit_C __iomem *reg = acb->pmuC;
1557 
1558                 writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, &reg->inbound_doorbell);
1559                 }
1560                 break;
1561         case ACB_ADAPTER_TYPE_D: {
1562                 struct MessageUnit_D *reg = acb->pmuD;
1563                 writel(ARCMSR_ARC1214_DRV2IOP_DATA_OUT_READ,
1564                         reg->inbound_doorbell);
1565                 }
1566                 break;
1567         }
1568 }
1569 
1570 static void arcmsr_iop_message_wrote(struct AdapterControlBlock *acb)
1571 {
1572         switch (acb->adapter_type) {
1573         case ACB_ADAPTER_TYPE_A: {
1574                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1575                 /*
1576                 ** push inbound doorbell tell iop, driver data write ok
1577                 ** and wait reply on next hwinterrupt for next Qbuffer post
1578                 */
1579                 writel(ARCMSR_INBOUND_DRIVER_DATA_WRITE_OK, &reg->inbound_doorbell);
1580                 }
1581                 break;
1582 
1583         case ACB_ADAPTER_TYPE_B: {
1584                 struct MessageUnit_B *reg = acb->pmuB;
1585                 /*
1586                 ** push inbound doorbell tell iop, driver data write ok
1587                 ** and wait reply on next hwinterrupt for next Qbuffer post
1588                 */
1589                 writel(ARCMSR_DRV2IOP_DATA_WRITE_OK, reg->drv2iop_doorbell);
1590                 }
1591                 break;
1592         case ACB_ADAPTER_TYPE_C: {
1593                 struct MessageUnit_C __iomem *reg = acb->pmuC;
1594                 /*
1595                 ** push inbound doorbell tell iop, driver data write ok
1596                 ** and wait reply on next hwinterrupt for next Qbuffer post
1597                 */
1598                 writel(ARCMSR_HBCMU_DRV2IOP_DATA_WRITE_OK, &reg->inbound_doorbell);
1599                 }
1600                 break;
1601         case ACB_ADAPTER_TYPE_D: {
1602                 struct MessageUnit_D *reg = acb->pmuD;
1603                 writel(ARCMSR_ARC1214_DRV2IOP_DATA_IN_READY,
1604                         reg->inbound_doorbell);
1605                 }
1606                 break;
1607         }
1608 }
1609 
1610 struct QBUFFER __iomem *arcmsr_get_iop_rqbuffer(struct AdapterControlBlock *acb)
1611 {
1612         struct QBUFFER __iomem *qbuffer = NULL;
1613         switch (acb->adapter_type) {
1614 
1615         case ACB_ADAPTER_TYPE_A: {
1616                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1617                 qbuffer = (struct QBUFFER __iomem *)&reg->message_rbuffer;
1618                 }
1619                 break;
1620 
1621         case ACB_ADAPTER_TYPE_B: {
1622                 struct MessageUnit_B *reg = acb->pmuB;
1623                 qbuffer = (struct QBUFFER __iomem *)reg->message_rbuffer;
1624                 }
1625                 break;
1626         case ACB_ADAPTER_TYPE_C: {
1627                 struct MessageUnit_C __iomem *phbcmu = acb->pmuC;
1628                 qbuffer = (struct QBUFFER __iomem *)&phbcmu->message_rbuffer;
1629                 }
1630                 break;
1631         case ACB_ADAPTER_TYPE_D: {
1632                 struct MessageUnit_D *reg = acb->pmuD;
1633                 qbuffer = (struct QBUFFER __iomem *)reg->message_rbuffer;
1634                 }
1635                 break;
1636         }
1637         return qbuffer;
1638 }
1639 
1640 static struct QBUFFER __iomem *arcmsr_get_iop_wqbuffer(struct AdapterControlBlock *acb)
1641 {
1642         struct QBUFFER __iomem *pqbuffer = NULL;
1643         switch (acb->adapter_type) {
1644 
1645         case ACB_ADAPTER_TYPE_A: {
1646                 struct MessageUnit_A __iomem *reg = acb->pmuA;
1647                 pqbuffer = (struct QBUFFER __iomem *) &reg->message_wbuffer;
1648                 }
1649                 break;
1650 
1651         case ACB_ADAPTER_TYPE_B: {
1652                 struct MessageUnit_B  *reg = acb->pmuB;
1653                 pqbuffer = (struct QBUFFER __iomem *)reg->message_wbuffer;
1654                 }
1655                 break;
1656         case ACB_ADAPTER_TYPE_C: {
1657                 struct MessageUnit_C __iomem *reg = acb->pmuC;
1658                 pqbuffer = (struct QBUFFER __iomem *)&reg->message_wbuffer;
1659                 }
1660                 break;
1661         case ACB_ADAPTER_TYPE_D: {
1662                 struct MessageUnit_D *reg = acb->pmuD;
1663                 pqbuffer = (struct QBUFFER __iomem *)reg->message_wbuffer;
1664                 }
1665                 break;
1666         }
1667         return pqbuffer;
1668 }
1669 
1670 static uint32_t
1671 arcmsr_Read_iop_rqbuffer_in_DWORD(struct AdapterControlBlock *acb,
1672                 struct QBUFFER __iomem *prbuffer)
1673 {
1674         uint8_t *pQbuffer;
1675         uint8_t *buf1 = NULL;
1676         uint32_t __iomem *iop_data;
1677         uint32_t iop_len, data_len, *buf2 = NULL;
1678 
1679         iop_data = (uint32_t __iomem *)prbuffer->data;
1680         iop_len = readl(&prbuffer->data_len);
1681         if (iop_len > 0) {
1682                 buf1 = kmalloc(128, GFP_ATOMIC);
1683                 buf2 = (uint32_t *)buf1;
1684                 if (buf1 == NULL)
1685                         return 0;
1686                 data_len = iop_len;
1687                 while (data_len >= 4) {
1688                         *buf2++ = readl(iop_data);
1689                         iop_data++;
1690                         data_len -= 4;
1691                 }
1692                 if (data_len)
1693                         *buf2 = readl(iop_data);
1694                 buf2 = (uint32_t *)buf1;
1695         }
1696         while (iop_len > 0) {
1697                 pQbuffer = &acb->rqbuffer[acb->rqbuf_putIndex];
1698                 *pQbuffer = *buf1;
1699                 acb->rqbuf_putIndex++;
1700                 /* if last, index number set it to 0 */
1701                 acb->rqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
1702                 buf1++;
1703                 iop_len--;
1704         }
1705         kfree(buf2);
1706         /* let IOP know data has been read */
1707         arcmsr_iop_message_read(acb);
1708         return 1;
1709 }
1710 
1711 uint32_t
1712 arcmsr_Read_iop_rqbuffer_data(struct AdapterControlBlock *acb,
1713         struct QBUFFER __iomem *prbuffer) {
1714 
1715         uint8_t *pQbuffer;
1716         uint8_t __iomem *iop_data;
1717         uint32_t iop_len;
1718 
1719         if (acb->adapter_type & (ACB_ADAPTER_TYPE_C | ACB_ADAPTER_TYPE_D))
1720                 return arcmsr_Read_iop_rqbuffer_in_DWORD(acb, prbuffer);
1721         iop_data = (uint8_t __iomem *)prbuffer->data;
1722         iop_len = readl(&prbuffer->data_len);
1723         while (iop_len > 0) {
1724                 pQbuffer = &acb->rqbuffer[acb->rqbuf_putIndex];
1725                 *pQbuffer = readb(iop_data);
1726                 acb->rqbuf_putIndex++;
1727                 acb->rqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
1728                 iop_data++;
1729                 iop_len--;
1730         }
1731         arcmsr_iop_message_read(acb);
1732         return 1;
1733 }
1734 
1735 static void arcmsr_iop2drv_data_wrote_handle(struct AdapterControlBlock *acb)
1736 {
1737         unsigned long flags;
1738         struct QBUFFER __iomem  *prbuffer;
1739         int32_t buf_empty_len;
1740 
1741         spin_lock_irqsave(&acb->rqbuffer_lock, flags);
1742         prbuffer = arcmsr_get_iop_rqbuffer(acb);
1743         buf_empty_len = (acb->rqbuf_putIndex - acb->rqbuf_getIndex - 1) &
1744                 (ARCMSR_MAX_QBUFFER - 1);
1745         if (buf_empty_len >= readl(&prbuffer->data_len)) {
1746                 if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
1747                         acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
1748         } else
1749                 acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
1750         spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
1751 }
1752 
1753 static void arcmsr_write_ioctldata2iop_in_DWORD(struct AdapterControlBlock *acb)
1754 {
1755         uint8_t *pQbuffer;
1756         struct QBUFFER __iomem *pwbuffer;
1757         uint8_t *buf1 = NULL;
1758         uint32_t __iomem *iop_data;
1759         uint32_t allxfer_len = 0, data_len, *buf2 = NULL, data;
1760 
1761         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
1762                 buf1 = kmalloc(128, GFP_ATOMIC);
1763                 buf2 = (uint32_t *)buf1;
1764                 if (buf1 == NULL)
1765                         return;
1766 
1767                 acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
1768                 pwbuffer = arcmsr_get_iop_wqbuffer(acb);
1769                 iop_data = (uint32_t __iomem *)pwbuffer->data;
1770                 while ((acb->wqbuf_getIndex != acb->wqbuf_putIndex)
1771                         && (allxfer_len < 124)) {
1772                         pQbuffer = &acb->wqbuffer[acb->wqbuf_getIndex];
1773                         *buf1 = *pQbuffer;
1774                         acb->wqbuf_getIndex++;
1775                         acb->wqbuf_getIndex %= ARCMSR_MAX_QBUFFER;
1776                         buf1++;
1777                         allxfer_len++;
1778                 }
1779                 data_len = allxfer_len;
1780                 buf1 = (uint8_t *)buf2;
1781                 while (data_len >= 4) {
1782                         data = *buf2++;
1783                         writel(data, iop_data);
1784                         iop_data++;
1785                         data_len -= 4;
1786                 }
1787                 if (data_len) {
1788                         data = *buf2;
1789                         writel(data, iop_data);
1790                 }
1791                 writel(allxfer_len, &pwbuffer->data_len);
1792                 kfree(buf1);
1793                 arcmsr_iop_message_wrote(acb);
1794         }
1795 }
1796 
1797 void
1798 arcmsr_write_ioctldata2iop(struct AdapterControlBlock *acb)
1799 {
1800         uint8_t *pQbuffer;
1801         struct QBUFFER __iomem *pwbuffer;
1802         uint8_t __iomem *iop_data;
1803         int32_t allxfer_len = 0;
1804 
1805         if (acb->adapter_type & (ACB_ADAPTER_TYPE_C | ACB_ADAPTER_TYPE_D)) {
1806                 arcmsr_write_ioctldata2iop_in_DWORD(acb);
1807                 return;
1808         }
1809         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_READED) {
1810                 acb->acb_flags &= (~ACB_F_MESSAGE_WQBUFFER_READED);
1811                 pwbuffer = arcmsr_get_iop_wqbuffer(acb);
1812                 iop_data = (uint8_t __iomem *)pwbuffer->data;
1813                 while ((acb->wqbuf_getIndex != acb->wqbuf_putIndex)
1814                         && (allxfer_len < 124)) {
1815                         pQbuffer = &acb->wqbuffer[acb->wqbuf_getIndex];
1816                         writeb(*pQbuffer, iop_data);
1817                         acb->wqbuf_getIndex++;
1818                         acb->wqbuf_getIndex %= ARCMSR_MAX_QBUFFER;
1819                         iop_data++;
1820                         allxfer_len++;
1821                 }
1822                 writel(allxfer_len, &pwbuffer->data_len);
1823                 arcmsr_iop_message_wrote(acb);
1824         }
1825 }
1826 
1827 static void arcmsr_iop2drv_data_read_handle(struct AdapterControlBlock *acb)
1828 {
1829         unsigned long flags;
1830 
1831         spin_lock_irqsave(&acb->wqbuffer_lock, flags);
1832         acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_READED;
1833         if (acb->wqbuf_getIndex != acb->wqbuf_putIndex)
1834                 arcmsr_write_ioctldata2iop(acb);
1835         if (acb->wqbuf_getIndex == acb->wqbuf_putIndex)
1836                 acb->acb_flags |= ACB_F_MESSAGE_WQBUFFER_CLEARED;
1837         spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
1838 }
1839 
1840 static void arcmsr_hbaA_doorbell_isr(struct AdapterControlBlock *acb)
1841 {
1842         uint32_t outbound_doorbell;
1843         struct MessageUnit_A __iomem *reg = acb->pmuA;
1844         outbound_doorbell = readl(&reg->outbound_doorbell);
1845         do {
1846                 writel(outbound_doorbell, &reg->outbound_doorbell);
1847                 if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_WRITE_OK)
1848                         arcmsr_iop2drv_data_wrote_handle(acb);
1849                 if (outbound_doorbell & ARCMSR_OUTBOUND_IOP331_DATA_READ_OK)
1850                         arcmsr_iop2drv_data_read_handle(acb);
1851                 outbound_doorbell = readl(&reg->outbound_doorbell);
1852         } while (outbound_doorbell & (ARCMSR_OUTBOUND_IOP331_DATA_WRITE_OK
1853                 | ARCMSR_OUTBOUND_IOP331_DATA_READ_OK));
1854 }
1855 static void arcmsr_hbaC_doorbell_isr(struct AdapterControlBlock *pACB)
1856 {
1857         uint32_t outbound_doorbell;
1858         struct MessageUnit_C __iomem *reg = pACB->pmuC;
1859         /*
1860         *******************************************************************
1861         **  Maybe here we need to check wrqbuffer_lock is lock or not
1862         **  DOORBELL: din! don!
1863         **  check if there are any mail need to pack from firmware
1864         *******************************************************************
1865         */
1866         outbound_doorbell = readl(&reg->outbound_doorbell);
1867         do {
1868                 writel(outbound_doorbell, &reg->outbound_doorbell_clear);
1869                 readl(&reg->outbound_doorbell_clear);
1870                 if (outbound_doorbell & ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_OK)
1871                         arcmsr_iop2drv_data_wrote_handle(pACB);
1872                 if (outbound_doorbell & ARCMSR_HBCMU_IOP2DRV_DATA_READ_OK)
1873                         arcmsr_iop2drv_data_read_handle(pACB);
1874                 if (outbound_doorbell & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE)
1875                         arcmsr_hbaC_message_isr(pACB);
1876                 outbound_doorbell = readl(&reg->outbound_doorbell);
1877         } while (outbound_doorbell & (ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_OK
1878                 | ARCMSR_HBCMU_IOP2DRV_DATA_READ_OK
1879                 | ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE));
1880 }
1881 
1882 static void arcmsr_hbaD_doorbell_isr(struct AdapterControlBlock *pACB)
1883 {
1884         uint32_t outbound_doorbell;
1885         struct MessageUnit_D  *pmu = pACB->pmuD;
1886 
1887         outbound_doorbell = readl(pmu->outbound_doorbell);
1888         do {
1889                 writel(outbound_doorbell, pmu->outbound_doorbell);
1890                 if (outbound_doorbell & ARCMSR_ARC1214_IOP2DRV_MESSAGE_CMD_DONE)
1891                         arcmsr_hbaD_message_isr(pACB);
1892                 if (outbound_doorbell & ARCMSR_ARC1214_IOP2DRV_DATA_WRITE_OK)
1893                         arcmsr_iop2drv_data_wrote_handle(pACB);
1894                 if (outbound_doorbell & ARCMSR_ARC1214_IOP2DRV_DATA_READ_OK)
1895                         arcmsr_iop2drv_data_read_handle(pACB);
1896                 outbound_doorbell = readl(pmu->outbound_doorbell);
1897         } while (outbound_doorbell & (ARCMSR_ARC1214_IOP2DRV_DATA_WRITE_OK
1898                 | ARCMSR_ARC1214_IOP2DRV_DATA_READ_OK
1899                 | ARCMSR_ARC1214_IOP2DRV_MESSAGE_CMD_DONE));
1900 }
1901 
1902 static void arcmsr_hbaA_postqueue_isr(struct AdapterControlBlock *acb)
1903 {
1904         uint32_t flag_ccb;
1905         struct MessageUnit_A __iomem *reg = acb->pmuA;
1906         struct ARCMSR_CDB *pARCMSR_CDB;
1907         struct CommandControlBlock *pCCB;
1908         bool error;
1909         while ((flag_ccb = readl(&reg->outbound_queueport)) != 0xFFFFFFFF) {
1910                 pARCMSR_CDB = (struct ARCMSR_CDB *)(acb->vir2phy_offset + (flag_ccb << 5));/*frame must be 32 bytes aligned*/
1911                 pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
1912                 error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
1913                 arcmsr_drain_donequeue(acb, pCCB, error);
1914         }
1915 }
1916 static void arcmsr_hbaB_postqueue_isr(struct AdapterControlBlock *acb)
1917 {
1918         uint32_t index;
1919         uint32_t flag_ccb;
1920         struct MessageUnit_B *reg = acb->pmuB;
1921         struct ARCMSR_CDB *pARCMSR_CDB;
1922         struct CommandControlBlock *pCCB;
1923         bool error;
1924         index = reg->doneq_index;
1925         while ((flag_ccb = reg->done_qbuffer[index]) != 0) {
1926                 reg->done_qbuffer[index] = 0;
1927                 pARCMSR_CDB = (struct ARCMSR_CDB *)(acb->vir2phy_offset+(flag_ccb << 5));/*frame must be 32 bytes aligned*/
1928                 pCCB = container_of(pARCMSR_CDB, struct CommandControlBlock, arcmsr_cdb);
1929                 error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
1930                 arcmsr_drain_donequeue(acb, pCCB, error);
1931                 index++;
1932                 index %= ARCMSR_MAX_HBB_POSTQUEUE;
1933                 reg->doneq_index = index;
1934         }
1935 }
1936 
1937 static void arcmsr_hbaC_postqueue_isr(struct AdapterControlBlock *acb)
1938 {
1939         struct MessageUnit_C __iomem *phbcmu;
1940         struct ARCMSR_CDB *arcmsr_cdb;
1941         struct CommandControlBlock *ccb;
1942         uint32_t flag_ccb, ccb_cdb_phy, throttling = 0;
1943         int error;
1944 
1945         phbcmu = acb->pmuC;
1946         /* areca cdb command done */
1947         /* Use correct offset and size for syncing */
1948 
1949         while ((flag_ccb = readl(&phbcmu->outbound_queueport_low)) !=
1950                         0xFFFFFFFF) {
1951                 ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);
1952                 arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset
1953                         + ccb_cdb_phy);
1954                 ccb = container_of(arcmsr_cdb, struct CommandControlBlock,
1955                         arcmsr_cdb);
1956                 error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1)
1957                         ? true : false;
1958                 /* check if command done with no error */
1959                 arcmsr_drain_donequeue(acb, ccb, error);
1960                 throttling++;
1961                 if (throttling == ARCMSR_HBC_ISR_THROTTLING_LEVEL) {
1962                         writel(ARCMSR_HBCMU_DRV2IOP_POSTQUEUE_THROTTLING,
1963                                 &phbcmu->inbound_doorbell);
1964                         throttling = 0;
1965                 }
1966         }
1967 }
1968 
1969 static void arcmsr_hbaD_postqueue_isr(struct AdapterControlBlock *acb)
1970 {
1971         u32 outbound_write_pointer, doneq_index, index_stripped, toggle;
1972         uint32_t addressLow, ccb_cdb_phy;
1973         int error;
1974         struct MessageUnit_D  *pmu;
1975         struct ARCMSR_CDB *arcmsr_cdb;
1976         struct CommandControlBlock *ccb;
1977         unsigned long flags;
1978 
1979         spin_lock_irqsave(&acb->doneq_lock, flags);
1980         pmu = acb->pmuD;
1981         outbound_write_pointer = pmu->done_qbuffer[0].addressLow + 1;
1982         doneq_index = pmu->doneq_index;
1983         if ((doneq_index & 0xFFF) != (outbound_write_pointer & 0xFFF)) {
1984                 do {
1985                         toggle = doneq_index & 0x4000;
1986                         index_stripped = (doneq_index & 0xFFF) + 1;
1987                         index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
1988                         pmu->doneq_index = index_stripped ? (index_stripped | toggle) :
1989                                 ((toggle ^ 0x4000) + 1);
1990                         doneq_index = pmu->doneq_index;
1991                         addressLow = pmu->done_qbuffer[doneq_index &
1992                                 0xFFF].addressLow;
1993                         ccb_cdb_phy = (addressLow & 0xFFFFFFF0);
1994                         arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset
1995                                 + ccb_cdb_phy);
1996                         ccb = container_of(arcmsr_cdb,
1997                                 struct CommandControlBlock, arcmsr_cdb);
1998                         error = (addressLow & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1)
1999                                 ? true : false;
2000                         arcmsr_drain_donequeue(acb, ccb, error);
2001                         writel(doneq_index, pmu->outboundlist_read_pointer);
2002                 } while ((doneq_index & 0xFFF) !=
2003                         (outbound_write_pointer & 0xFFF));
2004         }
2005         writel(ARCMSR_ARC1214_OUTBOUND_LIST_INTERRUPT_CLEAR,
2006                 pmu->outboundlist_interrupt_cause);
2007         readl(pmu->outboundlist_interrupt_cause);
2008         spin_unlock_irqrestore(&acb->doneq_lock, flags);
2009 }
2010 
2011 /*
2012 **********************************************************************************
2013 ** Handle a message interrupt
2014 **
2015 ** The only message interrupt we expect is in response to a query for the current adapter config.  
2016 ** We want this in order to compare the drivemap so that we can detect newly-attached drives.
2017 **********************************************************************************
2018 */
2019 static void arcmsr_hbaA_message_isr(struct AdapterControlBlock *acb)
2020 {
2021         struct MessageUnit_A __iomem *reg  = acb->pmuA;
2022         /*clear interrupt and message state*/
2023         writel(ARCMSR_MU_OUTBOUND_MESSAGE0_INT, &reg->outbound_intstatus);
2024         schedule_work(&acb->arcmsr_do_message_isr_bh);
2025 }
2026 static void arcmsr_hbaB_message_isr(struct AdapterControlBlock *acb)
2027 {
2028         struct MessageUnit_B *reg  = acb->pmuB;
2029 
2030         /*clear interrupt and message state*/
2031         writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
2032         schedule_work(&acb->arcmsr_do_message_isr_bh);
2033 }
2034 /*
2035 **********************************************************************************
2036 ** Handle a message interrupt
2037 **
2038 ** The only message interrupt we expect is in response to a query for the
2039 ** current adapter config.
2040 ** We want this in order to compare the drivemap so that we can detect newly-attached drives.
2041 **********************************************************************************
2042 */
2043 static void arcmsr_hbaC_message_isr(struct AdapterControlBlock *acb)
2044 {
2045         struct MessageUnit_C __iomem *reg  = acb->pmuC;
2046         /*clear interrupt and message state*/
2047         writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR, &reg->outbound_doorbell_clear);
2048         schedule_work(&acb->arcmsr_do_message_isr_bh);
2049 }
2050 
2051 static void arcmsr_hbaD_message_isr(struct AdapterControlBlock *acb)
2052 {
2053         struct MessageUnit_D *reg  = acb->pmuD;
2054 
2055         writel(ARCMSR_ARC1214_IOP2DRV_MESSAGE_CMD_DONE, reg->outbound_doorbell);
2056         readl(reg->outbound_doorbell);
2057         schedule_work(&acb->arcmsr_do_message_isr_bh);
2058 }
2059 
2060 static int arcmsr_hbaA_handle_isr(struct AdapterControlBlock *acb)
2061 {
2062         uint32_t outbound_intstatus;
2063         struct MessageUnit_A __iomem *reg = acb->pmuA;
2064         outbound_intstatus = readl(&reg->outbound_intstatus) &
2065                 acb->outbound_int_enable;
2066         if (!(outbound_intstatus & ARCMSR_MU_OUTBOUND_HANDLE_INT))
2067                 return IRQ_NONE;
2068         do {
2069                 writel(outbound_intstatus, &reg->outbound_intstatus);
2070                 if (outbound_intstatus & ARCMSR_MU_OUTBOUND_DOORBELL_INT)
2071                         arcmsr_hbaA_doorbell_isr(acb);
2072                 if (outbound_intstatus & ARCMSR_MU_OUTBOUND_POSTQUEUE_INT)
2073                         arcmsr_hbaA_postqueue_isr(acb);
2074                 if (outbound_intstatus & ARCMSR_MU_OUTBOUND_MESSAGE0_INT)
2075                         arcmsr_hbaA_message_isr(acb);
2076                 outbound_intstatus = readl(&reg->outbound_intstatus) &
2077                         acb->outbound_int_enable;
2078         } while (outbound_intstatus & (ARCMSR_MU_OUTBOUND_DOORBELL_INT
2079                 | ARCMSR_MU_OUTBOUND_POSTQUEUE_INT
2080                 | ARCMSR_MU_OUTBOUND_MESSAGE0_INT));
2081         return IRQ_HANDLED;
2082 }
2083 
2084 static int arcmsr_hbaB_handle_isr(struct AdapterControlBlock *acb)
2085 {
2086         uint32_t outbound_doorbell;
2087         struct MessageUnit_B *reg = acb->pmuB;
2088         outbound_doorbell = readl(reg->iop2drv_doorbell) &
2089                                 acb->outbound_int_enable;
2090         if (!outbound_doorbell)
2091                 return IRQ_NONE;
2092         do {
2093                 writel(~outbound_doorbell, reg->iop2drv_doorbell);
2094                 writel(ARCMSR_DRV2IOP_END_OF_INTERRUPT, reg->drv2iop_doorbell);
2095                 if (outbound_doorbell & ARCMSR_IOP2DRV_DATA_WRITE_OK)
2096                         arcmsr_iop2drv_data_wrote_handle(acb);
2097                 if (outbound_doorbell & ARCMSR_IOP2DRV_DATA_READ_OK)
2098                         arcmsr_iop2drv_data_read_handle(acb);
2099                 if (outbound_doorbell & ARCMSR_IOP2DRV_CDB_DONE)
2100                         arcmsr_hbaB_postqueue_isr(acb);
2101                 if (outbound_doorbell & ARCMSR_IOP2DRV_MESSAGE_CMD_DONE)
2102                         arcmsr_hbaB_message_isr(acb);
2103                 outbound_doorbell = readl(reg->iop2drv_doorbell) &
2104                         acb->outbound_int_enable;
2105         } while (outbound_doorbell & (ARCMSR_IOP2DRV_DATA_WRITE_OK
2106                 | ARCMSR_IOP2DRV_DATA_READ_OK
2107                 | ARCMSR_IOP2DRV_CDB_DONE
2108                 | ARCMSR_IOP2DRV_MESSAGE_CMD_DONE));
2109         return IRQ_HANDLED;
2110 }
2111 
2112 static int arcmsr_hbaC_handle_isr(struct AdapterControlBlock *pACB)
2113 {
2114         uint32_t host_interrupt_status;
2115         struct MessageUnit_C __iomem *phbcmu = pACB->pmuC;
2116         /*
2117         *********************************************
2118         **   check outbound intstatus
2119         *********************************************
2120         */
2121         host_interrupt_status = readl(&phbcmu->host_int_status) &
2122                 (ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR |
2123                 ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR);
2124         if (!host_interrupt_status)
2125                 return IRQ_NONE;
2126         do {
2127                 if (host_interrupt_status & ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR)
2128                         arcmsr_hbaC_doorbell_isr(pACB);
2129                 /* MU post queue interrupts*/
2130                 if (host_interrupt_status & ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR)
2131                         arcmsr_hbaC_postqueue_isr(pACB);
2132                 host_interrupt_status = readl(&phbcmu->host_int_status);
2133         } while (host_interrupt_status & (ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR |
2134                 ARCMSR_HBCMU_OUTBOUND_DOORBELL_ISR));
2135         return IRQ_HANDLED;
2136 }
2137 
2138 static irqreturn_t arcmsr_hbaD_handle_isr(struct AdapterControlBlock *pACB)
2139 {
2140         u32 host_interrupt_status;
2141         struct MessageUnit_D  *pmu = pACB->pmuD;
2142 
2143         host_interrupt_status = readl(pmu->host_int_status) &
2144                 (ARCMSR_ARC1214_OUTBOUND_POSTQUEUE_ISR |
2145                 ARCMSR_ARC1214_OUTBOUND_DOORBELL_ISR);
2146         if (!host_interrupt_status)
2147                 return IRQ_NONE;
2148         do {
2149                 /* MU post queue interrupts*/
2150                 if (host_interrupt_status &
2151                         ARCMSR_ARC1214_OUTBOUND_POSTQUEUE_ISR)
2152                         arcmsr_hbaD_postqueue_isr(pACB);
2153                 if (host_interrupt_status &
2154                         ARCMSR_ARC1214_OUTBOUND_DOORBELL_ISR)
2155                         arcmsr_hbaD_doorbell_isr(pACB);
2156                 host_interrupt_status = readl(pmu->host_int_status);
2157         } while (host_interrupt_status &
2158                 (ARCMSR_ARC1214_OUTBOUND_POSTQUEUE_ISR |
2159                 ARCMSR_ARC1214_OUTBOUND_DOORBELL_ISR));
2160         return IRQ_HANDLED;
2161 }
2162 
2163 static irqreturn_t arcmsr_interrupt(struct AdapterControlBlock *acb)
2164 {
2165         switch (acb->adapter_type) {
2166         case ACB_ADAPTER_TYPE_A:
2167                 return arcmsr_hbaA_handle_isr(acb);
2168                 break;
2169         case ACB_ADAPTER_TYPE_B:
2170                 return arcmsr_hbaB_handle_isr(acb);
2171                 break;
2172         case ACB_ADAPTER_TYPE_C:
2173                 return arcmsr_hbaC_handle_isr(acb);
2174         case ACB_ADAPTER_TYPE_D:
2175                 return arcmsr_hbaD_handle_isr(acb);
2176         default:
2177                 return IRQ_NONE;
2178         }
2179 }
2180 
2181 static void arcmsr_iop_parking(struct AdapterControlBlock *acb)
2182 {
2183         if (acb) {
2184                 /* stop adapter background rebuild */
2185                 if (acb->acb_flags & ACB_F_MSG_START_BGRB) {
2186                         uint32_t intmask_org;
2187                         acb->acb_flags &= ~ACB_F_MSG_START_BGRB;
2188                         intmask_org = arcmsr_disable_outbound_ints(acb);
2189                         arcmsr_stop_adapter_bgrb(acb);
2190                         arcmsr_flush_adapter_cache(acb);
2191                         arcmsr_enable_outbound_ints(acb, intmask_org);
2192                 }
2193         }
2194 }
2195 
2196 
2197 void arcmsr_clear_iop2drv_rqueue_buffer(struct AdapterControlBlock *acb)
2198 {
2199         uint32_t        i;
2200 
2201         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
2202                 for (i = 0; i < 15; i++) {
2203                         if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
2204                                 acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
2205                                 acb->rqbuf_getIndex = 0;
2206                                 acb->rqbuf_putIndex = 0;
2207                                 arcmsr_iop_message_read(acb);
2208                                 mdelay(30);
2209                         } else if (acb->rqbuf_getIndex !=
2210                                    acb->rqbuf_putIndex) {
2211                                 acb->rqbuf_getIndex = 0;
2212                                 acb->rqbuf_putIndex = 0;
2213                                 mdelay(30);
2214                         } else
2215                                 break;
2216                 }
2217         }
2218 }
2219 
2220 static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
2221                 struct scsi_cmnd *cmd)
2222 {
2223         char *buffer;
2224         unsigned short use_sg;
2225         int retvalue = 0, transfer_len = 0;
2226         unsigned long flags;
2227         struct CMD_MESSAGE_FIELD *pcmdmessagefld;
2228         uint32_t controlcode = (uint32_t)cmd->cmnd[5] << 24 |
2229                 (uint32_t)cmd->cmnd[6] << 16 |
2230                 (uint32_t)cmd->cmnd[7] << 8 |
2231                 (uint32_t)cmd->cmnd[8];
2232         struct scatterlist *sg;
2233 
2234         use_sg = scsi_sg_count(cmd);
2235         sg = scsi_sglist(cmd);
2236         buffer = kmap_atomic(sg_page(sg)) + sg->offset;
2237         if (use_sg > 1) {
2238                 retvalue = ARCMSR_MESSAGE_FAIL;
2239                 goto message_out;
2240         }
2241         transfer_len += sg->length;
2242         if (transfer_len > sizeof(struct CMD_MESSAGE_FIELD)) {
2243                 retvalue = ARCMSR_MESSAGE_FAIL;
2244                 pr_info("%s: ARCMSR_MESSAGE_FAIL!\n", __func__);
2245                 goto message_out;
2246         }
2247         pcmdmessagefld = (struct CMD_MESSAGE_FIELD *)buffer;
2248         switch (controlcode) {
2249         case ARCMSR_MESSAGE_READ_RQBUFFER: {
2250                 unsigned char *ver_addr;
2251                 uint8_t *ptmpQbuffer;
2252                 uint32_t allxfer_len = 0;
2253                 ver_addr = kmalloc(ARCMSR_API_DATA_BUFLEN, GFP_ATOMIC);
2254                 if (!ver_addr) {
2255                         retvalue = ARCMSR_MESSAGE_FAIL;
2256                         pr_info("%s: memory not enough!\n", __func__);
2257                         goto message_out;
2258                 }
2259                 ptmpQbuffer = ver_addr;
2260                 spin_lock_irqsave(&acb->rqbuffer_lock, flags);
2261                 if (acb->rqbuf_getIndex != acb->rqbuf_putIndex) {
2262                         unsigned int tail = acb->rqbuf_getIndex;
2263                         unsigned int head = acb->rqbuf_putIndex;
2264                         unsigned int cnt_to_end = CIRC_CNT_TO_END(head, tail, ARCMSR_MAX_QBUFFER);
2265 
2266                         allxfer_len = CIRC_CNT(head, tail, ARCMSR_MAX_QBUFFER);
2267                         if (allxfer_len > ARCMSR_API_DATA_BUFLEN)
2268                                 allxfer_len = ARCMSR_API_DATA_BUFLEN;
2269 
2270                         if (allxfer_len <= cnt_to_end)
2271                                 memcpy(ptmpQbuffer, acb->rqbuffer + tail, allxfer_len);
2272                         else {
2273                                 memcpy(ptmpQbuffer, acb->rqbuffer + tail, cnt_to_end);
2274                                 memcpy(ptmpQbuffer + cnt_to_end, acb->rqbuffer, allxfer_len - cnt_to_end);
2275                         }
2276                         acb->rqbuf_getIndex = (acb->rqbuf_getIndex + allxfer_len) % ARCMSR_MAX_QBUFFER;
2277                 }
2278                 memcpy(pcmdmessagefld->messagedatabuffer, ver_addr,
2279                         allxfer_len);
2280                 if (acb->acb_flags & ACB_F_IOPDATA_OVERFLOW) {
2281                         struct QBUFFER __iomem *prbuffer;
2282                         acb->acb_flags &= ~ACB_F_IOPDATA_OVERFLOW;
2283                         prbuffer = arcmsr_get_iop_rqbuffer(acb);
2284                         if (arcmsr_Read_iop_rqbuffer_data(acb, prbuffer) == 0)
2285                                 acb->acb_flags |= ACB_F_IOPDATA_OVERFLOW;
2286                 }
2287                 spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
2288                 kfree(ver_addr);
2289                 pcmdmessagefld->cmdmessage.Length = allxfer_len;
2290                 if (acb->fw_flag == FW_DEADLOCK)
2291                         pcmdmessagefld->cmdmessage.ReturnCode =
2292                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2293                 else
2294                         pcmdmessagefld->cmdmessage.ReturnCode =
2295                                 ARCMSR_MESSAGE_RETURNCODE_OK;
2296                 break;
2297         }
2298         case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
2299                 unsigned char *ver_addr;
2300                 int32_t user_len, cnt2end;
2301                 uint8_t *pQbuffer, *ptmpuserbuffer;
2302                 ver_addr = kmalloc(ARCMSR_API_DATA_BUFLEN, GFP_ATOMIC);
2303                 if (!ver_addr) {
2304                         retvalue = ARCMSR_MESSAGE_FAIL;
2305                         goto message_out;
2306                 }
2307                 ptmpuserbuffer = ver_addr;
2308                 user_len = pcmdmessagefld->cmdmessage.Length;
2309                 memcpy(ptmpuserbuffer,
2310                         pcmdmessagefld->messagedatabuffer, user_len);
2311                 spin_lock_irqsave(&acb->wqbuffer_lock, flags);
2312                 if (acb->wqbuf_putIndex != acb->wqbuf_getIndex) {
2313                         struct SENSE_DATA *sensebuffer =
2314                                 (struct SENSE_DATA *)cmd->sense_buffer;
2315                         arcmsr_write_ioctldata2iop(acb);
2316                         /* has error report sensedata */
2317                         sensebuffer->ErrorCode = SCSI_SENSE_CURRENT_ERRORS;
2318                         sensebuffer->SenseKey = ILLEGAL_REQUEST;
2319                         sensebuffer->AdditionalSenseLength = 0x0A;
2320                         sensebuffer->AdditionalSenseCode = 0x20;
2321                         sensebuffer->Valid = 1;
2322                         retvalue = ARCMSR_MESSAGE_FAIL;
2323                 } else {
2324                         pQbuffer = &acb->wqbuffer[acb->wqbuf_putIndex];
2325                         cnt2end = ARCMSR_MAX_QBUFFER - acb->wqbuf_putIndex;
2326                         if (user_len > cnt2end) {
2327                                 memcpy(pQbuffer, ptmpuserbuffer, cnt2end);
2328                                 ptmpuserbuffer += cnt2end;
2329                                 user_len -= cnt2end;
2330                                 acb->wqbuf_putIndex = 0;
2331                                 pQbuffer = acb->wqbuffer;
2332                         }
2333                         memcpy(pQbuffer, ptmpuserbuffer, user_len);
2334                         acb->wqbuf_putIndex += user_len;
2335                         acb->wqbuf_putIndex %= ARCMSR_MAX_QBUFFER;
2336                         if (acb->acb_flags & ACB_F_MESSAGE_WQBUFFER_CLEARED) {
2337                                 acb->acb_flags &=
2338                                                 ~ACB_F_MESSAGE_WQBUFFER_CLEARED;
2339                                 arcmsr_write_ioctldata2iop(acb);
2340                         }
2341                 }
2342                 spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
2343                 kfree(ver_addr);
2344                 if (acb->fw_flag == FW_DEADLOCK)
2345                         pcmdmessagefld->cmdmessage.ReturnCode =
2346                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2347                 else
2348                         pcmdmessagefld->cmdmessage.ReturnCode =
2349                                 ARCMSR_MESSAGE_RETURNCODE_OK;
2350                 break;
2351         }
2352         case ARCMSR_MESSAGE_CLEAR_RQBUFFER: {
2353                 uint8_t *pQbuffer = acb->rqbuffer;
2354 
2355                 arcmsr_clear_iop2drv_rqueue_buffer(acb);
2356                 spin_lock_irqsave(&acb->rqbuffer_lock, flags);
2357                 acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
2358                 acb->rqbuf_getIndex = 0;
2359                 acb->rqbuf_putIndex = 0;
2360                 memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
2361                 spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
2362                 if (acb->fw_flag == FW_DEADLOCK)
2363                         pcmdmessagefld->cmdmessage.ReturnCode =
2364                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2365                 else
2366                         pcmdmessagefld->cmdmessage.ReturnCode =
2367                                 ARCMSR_MESSAGE_RETURNCODE_OK;
2368                 break;
2369         }
2370         case ARCMSR_MESSAGE_CLEAR_WQBUFFER: {
2371                 uint8_t *pQbuffer = acb->wqbuffer;
2372                 spin_lock_irqsave(&acb->wqbuffer_lock, flags);
2373                 acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
2374                         ACB_F_MESSAGE_WQBUFFER_READED);
2375                 acb->wqbuf_getIndex = 0;
2376                 acb->wqbuf_putIndex = 0;
2377                 memset(pQbuffer, 0, ARCMSR_MAX_QBUFFER);
2378                 spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
2379                 if (acb->fw_flag == FW_DEADLOCK)
2380                         pcmdmessagefld->cmdmessage.ReturnCode =
2381                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2382                 else
2383                         pcmdmessagefld->cmdmessage.ReturnCode =
2384                                 ARCMSR_MESSAGE_RETURNCODE_OK;
2385                 break;
2386         }
2387         case ARCMSR_MESSAGE_CLEAR_ALLQBUFFER: {
2388                 uint8_t *pQbuffer;
2389                 arcmsr_clear_iop2drv_rqueue_buffer(acb);
2390                 spin_lock_irqsave(&acb->rqbuffer_lock, flags);
2391                 acb->acb_flags |= ACB_F_MESSAGE_RQBUFFER_CLEARED;
2392                 acb->rqbuf_getIndex = 0;
2393                 acb->rqbuf_putIndex = 0;
2394                 pQbuffer = acb->rqbuffer;
2395                 memset(pQbuffer, 0, sizeof(struct QBUFFER));
2396                 spin_unlock_irqrestore(&acb->rqbuffer_lock, flags);
2397                 spin_lock_irqsave(&acb->wqbuffer_lock, flags);
2398                 acb->acb_flags |= (ACB_F_MESSAGE_WQBUFFER_CLEARED |
2399                         ACB_F_MESSAGE_WQBUFFER_READED);
2400                 acb->wqbuf_getIndex = 0;
2401                 acb->wqbuf_putIndex = 0;
2402                 pQbuffer = acb->wqbuffer;
2403                 memset(pQbuffer, 0, sizeof(struct QBUFFER));
2404                 spin_unlock_irqrestore(&acb->wqbuffer_lock, flags);
2405                 if (acb->fw_flag == FW_DEADLOCK)
2406                         pcmdmessagefld->cmdmessage.ReturnCode =
2407                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2408                 else
2409                         pcmdmessagefld->cmdmessage.ReturnCode =
2410                                 ARCMSR_MESSAGE_RETURNCODE_OK;
2411                 break;
2412         }
2413         case ARCMSR_MESSAGE_RETURN_CODE_3F: {
2414                 if (acb->fw_flag == FW_DEADLOCK)
2415                         pcmdmessagefld->cmdmessage.ReturnCode =
2416                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2417                 else
2418                         pcmdmessagefld->cmdmessage.ReturnCode =
2419                                 ARCMSR_MESSAGE_RETURNCODE_3F;
2420                 break;
2421         }
2422         case ARCMSR_MESSAGE_SAY_HELLO: {
2423                 int8_t *hello_string = "Hello! I am ARCMSR";
2424                 if (acb->fw_flag == FW_DEADLOCK)
2425                         pcmdmessagefld->cmdmessage.ReturnCode =
2426                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2427                 else
2428                         pcmdmessagefld->cmdmessage.ReturnCode =
2429                                 ARCMSR_MESSAGE_RETURNCODE_OK;
2430                 memcpy(pcmdmessagefld->messagedatabuffer,
2431                         hello_string, (int16_t)strlen(hello_string));
2432                 break;
2433         }
2434         case ARCMSR_MESSAGE_SAY_GOODBYE: {
2435                 if (acb->fw_flag == FW_DEADLOCK)
2436                         pcmdmessagefld->cmdmessage.ReturnCode =
2437                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2438                 else
2439                         pcmdmessagefld->cmdmessage.ReturnCode =
2440                                 ARCMSR_MESSAGE_RETURNCODE_OK;
2441                 arcmsr_iop_parking(acb);
2442                 break;
2443         }
2444         case ARCMSR_MESSAGE_FLUSH_ADAPTER_CACHE: {
2445                 if (acb->fw_flag == FW_DEADLOCK)
2446                         pcmdmessagefld->cmdmessage.ReturnCode =
2447                                 ARCMSR_MESSAGE_RETURNCODE_BUS_HANG_ON;
2448                 else
2449                         pcmdmessagefld->cmdmessage.ReturnCode =
2450                                 ARCMSR_MESSAGE_RETURNCODE_OK;
2451                 arcmsr_flush_adapter_cache(acb);
2452                 break;
2453         }
2454         default:
2455                 retvalue = ARCMSR_MESSAGE_FAIL;
2456                 pr_info("%s: unknown controlcode!\n", __func__);
2457         }
2458 message_out:
2459         if (use_sg) {
2460                 struct scatterlist *sg = scsi_sglist(cmd);
2461                 kunmap_atomic(buffer - sg->offset);
2462         }
2463         return retvalue;
2464 }
2465 
2466 static struct CommandControlBlock *arcmsr_get_freeccb(struct AdapterControlBlock *acb)
2467 {
2468         struct list_head *head = &acb->ccb_free_list;
2469         struct CommandControlBlock *ccb = NULL;
2470         unsigned long flags;
2471         spin_lock_irqsave(&acb->ccblist_lock, flags);
2472         if (!list_empty(head)) {
2473                 ccb = list_entry(head->next, struct CommandControlBlock, list);
2474                 list_del_init(&ccb->list);
2475         }else{
2476                 spin_unlock_irqrestore(&acb->ccblist_lock, flags);
2477                 return NULL;
2478         }
2479         spin_unlock_irqrestore(&acb->ccblist_lock, flags);
2480         return ccb;
2481 }
2482 
2483 static void arcmsr_handle_virtual_command(struct AdapterControlBlock *acb,
2484                 struct scsi_cmnd *cmd)
2485 {
2486         switch (cmd->cmnd[0]) {
2487         case INQUIRY: {
2488                 unsigned char inqdata[36];
2489                 char *buffer;
2490                 struct scatterlist *sg;
2491 
2492                 if (cmd->device->lun) {
2493                         cmd->result = (DID_TIME_OUT << 16);
2494                         cmd->scsi_done(cmd);
2495                         return;
2496                 }
2497                 inqdata[0] = TYPE_PROCESSOR;
2498                 /* Periph Qualifier & Periph Dev Type */
2499                 inqdata[1] = 0;
2500                 /* rem media bit & Dev Type Modifier */
2501                 inqdata[2] = 0;
2502                 /* ISO, ECMA, & ANSI versions */
2503                 inqdata[4] = 31;
2504                 /* length of additional data */
2505                 strncpy(&inqdata[8], "Areca   ", 8);
2506                 /* Vendor Identification */
2507                 strncpy(&inqdata[16], "RAID controller ", 16);
2508                 /* Product Identification */
2509                 strncpy(&inqdata[32], "R001", 4); /* Product Revision */
2510 
2511                 sg = scsi_sglist(cmd);
2512                 buffer = kmap_atomic(sg_page(sg)) + sg->offset;
2513 
2514                 memcpy(buffer, inqdata, sizeof(inqdata));
2515                 sg = scsi_sglist(cmd);
2516                 kunmap_atomic(buffer - sg->offset);
2517 
2518                 cmd->scsi_done(cmd);
2519         }
2520         break;
2521         case WRITE_BUFFER:
2522         case READ_BUFFER: {
2523                 if (arcmsr_iop_message_xfer(acb, cmd))
2524                         cmd->result = (DID_ERROR << 16);
2525                 cmd->scsi_done(cmd);
2526         }
2527         break;
2528         default:
2529                 cmd->scsi_done(cmd);
2530         }
2531 }
2532 
2533 static int arcmsr_queue_command_lck(struct scsi_cmnd *cmd,
2534         void (* done)(struct scsi_cmnd *))
2535 {
2536         struct Scsi_Host *host = cmd->device->host;
2537         struct AdapterControlBlock *acb = (struct AdapterControlBlock *) host->hostdata;
2538         struct CommandControlBlock *ccb;
2539         int target = cmd->device->id;
2540         int lun = cmd->device->lun;
2541         uint8_t scsicmd = cmd->cmnd[0];
2542         cmd->scsi_done = done;
2543         cmd->host_scribble = NULL;
2544         cmd->result = 0;
2545         if ((scsicmd == SYNCHRONIZE_CACHE) ||(scsicmd == SEND_DIAGNOSTIC)){
2546                 if(acb->devstate[target][lun] == ARECA_RAID_GONE) {
2547                         cmd->result = (DID_NO_CONNECT << 16);
2548                 }
2549                 cmd->scsi_done(cmd);
2550                 return 0;
2551         }
2552         if (target == 16) {
2553                 /* virtual device for iop message transfer */
2554                 arcmsr_handle_virtual_command(acb, cmd);
2555                 return 0;
2556         }
2557         ccb = arcmsr_get_freeccb(acb);
2558         if (!ccb)
2559                 return SCSI_MLQUEUE_HOST_BUSY;
2560         if (arcmsr_build_ccb( acb, ccb, cmd ) == FAILED) {
2561                 cmd->result = (DID_ERROR << 16) | (RESERVATION_CONFLICT << 1);
2562                 cmd->scsi_done(cmd);
2563                 return 0;
2564         }
2565         arcmsr_post_ccb(acb, ccb);
2566         return 0;
2567 }
2568 
2569 static DEF_SCSI_QCMD(arcmsr_queue_command)
2570 
2571 static bool arcmsr_hbaA_get_config(struct AdapterControlBlock *acb)
2572 {
2573         struct MessageUnit_A __iomem *reg = acb->pmuA;
2574         char *acb_firm_model = acb->firm_model;
2575         char *acb_firm_version = acb->firm_version;
2576         char *acb_device_map = acb->device_map;
2577         char __iomem *iop_firm_model = (char __iomem *)(&reg->message_rwbuffer[15]);
2578         char __iomem *iop_firm_version = (char __iomem *)(&reg->message_rwbuffer[17]);
2579         char __iomem *iop_device_map = (char __iomem *)(&reg->message_rwbuffer[21]);
2580         int count;
2581         writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
2582         if (!arcmsr_hbaA_wait_msgint_ready(acb)) {
2583                 printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
2584                         miscellaneous data' timeout \n", acb->host->host_no);
2585                 return false;
2586         }
2587         count = 8;
2588         while (count){
2589                 *acb_firm_model = readb(iop_firm_model);
2590                 acb_firm_model++;
2591                 iop_firm_model++;
2592                 count--;
2593         }
2594 
2595         count = 16;
2596         while (count){
2597                 *acb_firm_version = readb(iop_firm_version);
2598                 acb_firm_version++;
2599                 iop_firm_version++;
2600                 count--;
2601         }
2602 
2603         count=16;
2604         while(count){
2605                 *acb_device_map = readb(iop_device_map);
2606                 acb_device_map++;
2607                 iop_device_map++;
2608                 count--;
2609         }
2610         pr_notice("Areca RAID Controller%d: Model %s, F/W %s\n",
2611                 acb->host->host_no,
2612                 acb->firm_model,
2613                 acb->firm_version);
2614         acb->signature = readl(&reg->message_rwbuffer[0]);
2615         acb->firm_request_len = readl(&reg->message_rwbuffer[1]);
2616         acb->firm_numbers_queue = readl(&reg->message_rwbuffer[2]);
2617         acb->firm_sdram_size = readl(&reg->message_rwbuffer[3]);
2618         acb->firm_hd_channels = readl(&reg->message_rwbuffer[4]);
2619         acb->firm_cfg_version = readl(&reg->message_rwbuffer[25]);  /*firm_cfg_version,25,100-103*/
2620         return true;
2621 }
2622 static bool arcmsr_hbaB_get_config(struct AdapterControlBlock *acb)
2623 {
2624         struct MessageUnit_B *reg = acb->pmuB;
2625         struct pci_dev *pdev = acb->pdev;
2626         void *dma_coherent;
2627         dma_addr_t dma_coherent_handle;
2628         char *acb_firm_model = acb->firm_model;
2629         char *acb_firm_version = acb->firm_version;
2630         char *acb_device_map = acb->device_map;
2631         char __iomem *iop_firm_model;
2632         /*firm_model,15,60-67*/
2633         char __iomem *iop_firm_version;
2634         /*firm_version,17,68-83*/
2635         char __iomem *iop_device_map;
2636         /*firm_version,21,84-99*/
2637         int count;
2638 
2639         acb->roundup_ccbsize = roundup(sizeof(struct MessageUnit_B), 32);
2640         dma_coherent = dma_alloc_coherent(&pdev->dev, acb->roundup_ccbsize,
2641                         &dma_coherent_handle, GFP_KERNEL);
2642         if (!dma_coherent){
2643                 printk(KERN_NOTICE
2644                         "arcmsr%d: dma_alloc_coherent got error for hbb mu\n",
2645                         acb->host->host_no);
2646                 return false;
2647         }
2648         acb->dma_coherent_handle2 = dma_coherent_handle;
2649         acb->dma_coherent2 = dma_coherent;
2650         reg = (struct MessageUnit_B *)dma_coherent;
2651         acb->pmuB = reg;
2652         reg->drv2iop_doorbell= (uint32_t __iomem *)((unsigned long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL);
2653         reg->drv2iop_doorbell_mask = (uint32_t __iomem *)((unsigned long)acb->mem_base0 + ARCMSR_DRV2IOP_DOORBELL_MASK);
2654         reg->iop2drv_doorbell = (uint32_t __iomem *)((unsigned long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL);
2655         reg->iop2drv_doorbell_mask = (uint32_t __iomem *)((unsigned long)acb->mem_base0 + ARCMSR_IOP2DRV_DOORBELL_MASK);
2656         reg->message_wbuffer = (uint32_t __iomem *)((unsigned long)acb->mem_base1 + ARCMSR_MESSAGE_WBUFFER);
2657         reg->message_rbuffer =  (uint32_t __iomem *)((unsigned long)acb->mem_base1 + ARCMSR_MESSAGE_RBUFFER);
2658         reg->message_rwbuffer = (uint32_t __iomem *)((unsigned long)acb->mem_base1 + ARCMSR_MESSAGE_RWBUFFER);
2659         iop_firm_model = (char __iomem *)(&reg->message_rwbuffer[15]);  /*firm_model,15,60-67*/
2660         iop_firm_version = (char __iomem *)(&reg->message_rwbuffer[17]);        /*firm_version,17,68-83*/
2661         iop_device_map = (char __iomem *)(&reg->message_rwbuffer[21]);  /*firm_version,21,84-99*/
2662 
2663         writel(ARCMSR_MESSAGE_GET_CONFIG, reg->drv2iop_doorbell);
2664         if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
2665                 printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
2666                         miscellaneous data' timeout \n", acb->host->host_no);
2667                 return false;
2668         }
2669         count = 8;
2670         while (count){
2671                 *acb_firm_model = readb(iop_firm_model);
2672                 acb_firm_model++;
2673                 iop_firm_model++;
2674                 count--;
2675         }
2676         count = 16;
2677         while (count){
2678                 *acb_firm_version = readb(iop_firm_version);
2679                 acb_firm_version++;
2680                 iop_firm_version++;
2681                 count--;
2682         }
2683 
2684         count = 16;
2685         while(count){
2686                 *acb_device_map = readb(iop_device_map);
2687                 acb_device_map++;
2688                 iop_device_map++;
2689                 count--;
2690         }
2691         
2692         pr_notice("Areca RAID Controller%d: Model %s, F/W %s\n",
2693                 acb->host->host_no,
2694                 acb->firm_model,
2695                 acb->firm_version);
2696 
2697         acb->signature = readl(&reg->message_rwbuffer[1]);
2698         /*firm_signature,1,00-03*/
2699         acb->firm_request_len = readl(&reg->message_rwbuffer[2]);
2700         /*firm_request_len,1,04-07*/
2701         acb->firm_numbers_queue = readl(&reg->message_rwbuffer[3]);
2702         /*firm_numbers_queue,2,08-11*/
2703         acb->firm_sdram_size = readl(&reg->message_rwbuffer[4]);
2704         /*firm_sdram_size,3,12-15*/
2705         acb->firm_hd_channels = readl(&reg->message_rwbuffer[5]);
2706         /*firm_ide_channels,4,16-19*/
2707         acb->firm_cfg_version = readl(&reg->message_rwbuffer[25]);  /*firm_cfg_version,25,100-103*/
2708         /*firm_ide_channels,4,16-19*/
2709         return true;
2710 }
2711 
2712 static bool arcmsr_hbaC_get_config(struct AdapterControlBlock *pACB)
2713 {
2714         uint32_t intmask_org, Index, firmware_state = 0;
2715         struct MessageUnit_C __iomem *reg = pACB->pmuC;
2716         char *acb_firm_model = pACB->firm_model;
2717         char *acb_firm_version = pACB->firm_version;
2718         char __iomem *iop_firm_model = (char __iomem *)(&reg->msgcode_rwbuffer[15]);    /*firm_model,15,60-67*/
2719         char __iomem *iop_firm_version = (char __iomem *)(&reg->msgcode_rwbuffer[17]);  /*firm_version,17,68-83*/
2720         int count;
2721         /* disable all outbound interrupt */
2722         intmask_org = readl(&reg->host_int_mask); /* disable outbound message0 int */
2723         writel(intmask_org|ARCMSR_HBCMU_ALL_INTMASKENABLE, &reg->host_int_mask);
2724         /* wait firmware ready */
2725         do {
2726                 firmware_state = readl(&reg->outbound_msgaddr1);
2727         } while ((firmware_state & ARCMSR_HBCMU_MESSAGE_FIRMWARE_OK) == 0);
2728         /* post "get config" instruction */
2729         writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
2730         writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
2731         /* wait message ready */
2732         for (Index = 0; Index < 2000; Index++) {
2733                 if (readl(&reg->outbound_doorbell) & ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE) {
2734                         writel(ARCMSR_HBCMU_IOP2DRV_MESSAGE_CMD_DONE_DOORBELL_CLEAR, &reg->outbound_doorbell_clear);/*clear interrupt*/
2735                         break;
2736                 }
2737                 udelay(10);
2738         } /*max 1 seconds*/
2739         if (Index >= 2000) {
2740                 printk(KERN_NOTICE "arcmsr%d: wait 'get adapter firmware \
2741                         miscellaneous data' timeout \n", pACB->host->host_no);
2742                 return false;
2743         }
2744         count = 8;
2745         while (count) {
2746                 *acb_firm_model = readb(iop_firm_model);
2747                 acb_firm_model++;
2748                 iop_firm_model++;
2749                 count--;
2750         }
2751         count = 16;
2752         while (count) {
2753                 *acb_firm_version = readb(iop_firm_version);
2754                 acb_firm_version++;
2755                 iop_firm_version++;
2756                 count--;
2757         }
2758         pr_notice("Areca RAID Controller%d: Model %s, F/W %s\n",
2759                 pACB->host->host_no,
2760                 pACB->firm_model,
2761                 pACB->firm_version);
2762         pACB->firm_request_len = readl(&reg->msgcode_rwbuffer[1]);   /*firm_request_len,1,04-07*/
2763         pACB->firm_numbers_queue = readl(&reg->msgcode_rwbuffer[2]); /*firm_numbers_queue,2,08-11*/
2764         pACB->firm_sdram_size = readl(&reg->msgcode_rwbuffer[3]);    /*firm_sdram_size,3,12-15*/
2765         pACB->firm_hd_channels = readl(&reg->msgcode_rwbuffer[4]);  /*firm_ide_channels,4,16-19*/
2766         pACB->firm_cfg_version = readl(&reg->msgcode_rwbuffer[25]);  /*firm_cfg_version,25,100-103*/
2767         /*all interrupt service will be enable at arcmsr_iop_init*/
2768         return true;
2769 }
2770 
2771 static bool arcmsr_hbaD_get_config(struct AdapterControlBlock *acb)
2772 {
2773         char *acb_firm_model = acb->firm_model;
2774         char *acb_firm_version = acb->firm_version;
2775         char *acb_device_map = acb->device_map;
2776         char __iomem *iop_firm_model;
2777         char __iomem *iop_firm_version;
2778         char __iomem *iop_device_map;
2779         u32 count;
2780         struct MessageUnit_D *reg;
2781         void *dma_coherent2;
2782         dma_addr_t dma_coherent_handle2;
2783         struct pci_dev *pdev = acb->pdev;
2784 
2785         acb->roundup_ccbsize = roundup(sizeof(struct MessageUnit_D), 32);
2786         dma_coherent2 = dma_alloc_coherent(&pdev->dev, acb->roundup_ccbsize,
2787                 &dma_coherent_handle2, GFP_KERNEL);
2788         if (!dma_coherent2) {
2789                 pr_notice("DMA allocation failed...\n");
2790                 return false;
2791         }
2792         memset(dma_coherent2, 0, acb->roundup_ccbsize);
2793         acb->dma_coherent_handle2 = dma_coherent_handle2;
2794         acb->dma_coherent2 = dma_coherent2;
2795         reg = (struct MessageUnit_D *)dma_coherent2;
2796         acb->pmuD = reg;
2797         reg->chip_id = acb->mem_base0 + ARCMSR_ARC1214_CHIP_ID;
2798         reg->cpu_mem_config = acb->mem_base0 +
2799                 ARCMSR_ARC1214_CPU_MEMORY_CONFIGURATION;
2800         reg->i2o_host_interrupt_mask = acb->mem_base0 +
2801                 ARCMSR_ARC1214_I2_HOST_INTERRUPT_MASK;
2802         reg->sample_at_reset = acb->mem_base0 + ARCMSR_ARC1214_SAMPLE_RESET;
2803         reg->reset_request = acb->mem_base0 + ARCMSR_ARC1214_RESET_REQUEST;
2804         reg->host_int_status = acb->mem_base0 +
2805                 ARCMSR_ARC1214_MAIN_INTERRUPT_STATUS;
2806         reg->pcief0_int_enable = acb->mem_base0 +
2807                 ARCMSR_ARC1214_PCIE_F0_INTERRUPT_ENABLE;
2808         reg->inbound_msgaddr0 = acb->mem_base0 +
2809                 ARCMSR_ARC1214_INBOUND_MESSAGE0;
2810         reg->inbound_msgaddr1 = acb->mem_base0 +
2811                 ARCMSR_ARC1214_INBOUND_MESSAGE1;
2812         reg->outbound_msgaddr0 = acb->mem_base0 +
2813                 ARCMSR_ARC1214_OUTBOUND_MESSAGE0;
2814         reg->outbound_msgaddr1 = acb->mem_base0 +
2815                 ARCMSR_ARC1214_OUTBOUND_MESSAGE1;
2816         reg->inbound_doorbell = acb->mem_base0 +
2817                 ARCMSR_ARC1214_INBOUND_DOORBELL;
2818         reg->outbound_doorbell = acb->mem_base0 +
2819                 ARCMSR_ARC1214_OUTBOUND_DOORBELL;
2820         reg->outbound_doorbell_enable = acb->mem_base0 +
2821                 ARCMSR_ARC1214_OUTBOUND_DOORBELL_ENABLE;
2822         reg->inboundlist_base_low = acb->mem_base0 +
2823                 ARCMSR_ARC1214_INBOUND_LIST_BASE_LOW;
2824         reg->inboundlist_base_high = acb->mem_base0 +
2825                 ARCMSR_ARC1214_INBOUND_LIST_BASE_HIGH;
2826         reg->inboundlist_write_pointer = acb->mem_base0 +
2827                 ARCMSR_ARC1214_INBOUND_LIST_WRITE_POINTER;
2828         reg->outboundlist_base_low = acb->mem_base0 +
2829                 ARCMSR_ARC1214_OUTBOUND_LIST_BASE_LOW;
2830         reg->outboundlist_base_high = acb->mem_base0 +
2831                 ARCMSR_ARC1214_OUTBOUND_LIST_BASE_HIGH;
2832         reg->outboundlist_copy_pointer = acb->mem_base0 +
2833                 ARCMSR_ARC1214_OUTBOUND_LIST_COPY_POINTER;
2834         reg->outboundlist_read_pointer = acb->mem_base0 +
2835                 ARCMSR_ARC1214_OUTBOUND_LIST_READ_POINTER;
2836         reg->outboundlist_interrupt_cause = acb->mem_base0 +
2837                 ARCMSR_ARC1214_OUTBOUND_INTERRUPT_CAUSE;
2838         reg->outboundlist_interrupt_enable = acb->mem_base0 +
2839                 ARCMSR_ARC1214_OUTBOUND_INTERRUPT_ENABLE;
2840         reg->message_wbuffer = acb->mem_base0 + ARCMSR_ARC1214_MESSAGE_WBUFFER;
2841         reg->message_rbuffer = acb->mem_base0 + ARCMSR_ARC1214_MESSAGE_RBUFFER;
2842         reg->msgcode_rwbuffer = acb->mem_base0 +
2843                 ARCMSR_ARC1214_MESSAGE_RWBUFFER;
2844         iop_firm_model = (char __iomem *)(&reg->msgcode_rwbuffer[15]);
2845         iop_firm_version = (char __iomem *)(&reg->msgcode_rwbuffer[17]);
2846         iop_device_map = (char __iomem *)(&reg->msgcode_rwbuffer[21]);
2847         if (readl(acb->pmuD->outbound_doorbell) &
2848                 ARCMSR_ARC1214_IOP2DRV_MESSAGE_CMD_DONE) {
2849                 writel(ARCMSR_ARC1214_IOP2DRV_MESSAGE_CMD_DONE,
2850                         acb->pmuD->outbound_doorbell);/*clear interrupt*/
2851         }
2852         /* post "get config" instruction */
2853         writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, reg->inbound_msgaddr0);
2854         /* wait message ready */
2855         if (!arcmsr_hbaD_wait_msgint_ready(acb)) {
2856                 pr_notice("arcmsr%d: wait get adapter firmware "
2857                         "miscellaneous data timeout\n", acb->host->host_no);
2858                 dma_free_coherent(&acb->pdev->dev, acb->roundup_ccbsize,
2859                         acb->dma_coherent2, acb->dma_coherent_handle2);
2860                 return false;
2861         }
2862         count = 8;
2863         while (count) {
2864                 *acb_firm_model = readb(iop_firm_model);
2865                 acb_firm_model++;
2866                 iop_firm_model++;
2867                 count--;
2868         }
2869         count = 16;
2870         while (count) {
2871                 *acb_firm_version = readb(iop_firm_version);
2872                 acb_firm_version++;
2873                 iop_firm_version++;
2874                 count--;
2875         }
2876         count = 16;
2877         while (count) {
2878                 *acb_device_map = readb(iop_device_map);
2879                 acb_device_map++;
2880                 iop_device_map++;
2881                 count--;
2882         }
2883         acb->signature = readl(&reg->msgcode_rwbuffer[1]);
2884         /*firm_signature,1,00-03*/
2885         acb->firm_request_len = readl(&reg->msgcode_rwbuffer[2]);
2886         /*firm_request_len,1,04-07*/
2887         acb->firm_numbers_queue = readl(&reg->msgcode_rwbuffer[3]);
2888         /*firm_numbers_queue,2,08-11*/
2889         acb->firm_sdram_size = readl(&reg->msgcode_rwbuffer[4]);
2890         /*firm_sdram_size,3,12-15*/
2891         acb->firm_hd_channels = readl(&reg->msgcode_rwbuffer[5]);
2892         /*firm_hd_channels,4,16-19*/
2893         acb->firm_cfg_version = readl(&reg->msgcode_rwbuffer[25]);
2894         pr_notice("Areca RAID Controller%d: Model %s, F/W %s\n",
2895                 acb->host->host_no,
2896                 acb->firm_model,
2897                 acb->firm_version);
2898         return true;
2899 }
2900 
2901 static bool arcmsr_get_firmware_spec(struct AdapterControlBlock *acb)
2902 {
2903         bool rtn = false;
2904 
2905         switch (acb->adapter_type) {
2906         case ACB_ADAPTER_TYPE_A:
2907                 rtn = arcmsr_hbaA_get_config(acb);
2908                 break;
2909         case ACB_ADAPTER_TYPE_B:
2910                 rtn = arcmsr_hbaB_get_config(acb);
2911                 break;
2912         case ACB_ADAPTER_TYPE_C:
2913                 rtn = arcmsr_hbaC_get_config(acb);
2914                 break;
2915         case ACB_ADAPTER_TYPE_D:
2916                 rtn = arcmsr_hbaD_get_config(acb);
2917                 break;
2918         default:
2919                 break;
2920         }
2921         if (acb->firm_numbers_queue > ARCMSR_MAX_OUTSTANDING_CMD)
2922                 acb->maxOutstanding = ARCMSR_MAX_OUTSTANDING_CMD;
2923         else
2924                 acb->maxOutstanding = acb->firm_numbers_queue - 1;
2925         acb->host->can_queue = acb->maxOutstanding;
2926         return rtn;
2927 }
2928 
2929 static int arcmsr_hbaA_polling_ccbdone(struct AdapterControlBlock *acb,
2930         struct CommandControlBlock *poll_ccb)
2931 {
2932         struct MessageUnit_A __iomem *reg = acb->pmuA;
2933         struct CommandControlBlock *ccb;
2934         struct ARCMSR_CDB *arcmsr_cdb;
2935         uint32_t flag_ccb, outbound_intstatus, poll_ccb_done = 0, poll_count = 0;
2936         int rtn;
2937         bool error;
2938         polling_hba_ccb_retry:
2939         poll_count++;
2940         outbound_intstatus = readl(&reg->outbound_intstatus) & acb->outbound_int_enable;
2941         writel(outbound_intstatus, &reg->outbound_intstatus);/*clear interrupt*/
2942         while (1) {
2943                 if ((flag_ccb = readl(&reg->outbound_queueport)) == 0xFFFFFFFF) {
2944                         if (poll_ccb_done){
2945                                 rtn = SUCCESS;
2946                                 break;
2947                         }else {
2948                                 msleep(25);
2949                                 if (poll_count > 100){
2950                                         rtn = FAILED;
2951                                         break;
2952                                 }
2953                                 goto polling_hba_ccb_retry;
2954                         }
2955                 }
2956                 arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset + (flag_ccb << 5));
2957                 ccb = container_of(arcmsr_cdb, struct CommandControlBlock, arcmsr_cdb);
2958                 poll_ccb_done |= (ccb == poll_ccb) ? 1 : 0;
2959                 if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
2960                         if ((ccb->startdone == ARCMSR_CCB_ABORTED) || (ccb == poll_ccb)) {
2961                                 printk(KERN_NOTICE "arcmsr%d: scsi id = %d lun = %d ccb = '0x%p'"
2962                                         " poll command abort successfully \n"
2963                                         , acb->host->host_no
2964                                         , ccb->pcmd->device->id
2965                                         , (u32)ccb->pcmd->device->lun
2966                                         , ccb);
2967                                 ccb->pcmd->result = DID_ABORT << 16;
2968                                 arcmsr_ccb_complete(ccb);
2969                                 continue;
2970                         }
2971                         printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
2972                                 " command done ccb = '0x%p'"
2973                                 "ccboutstandingcount = %d \n"
2974                                 , acb->host->host_no
2975                                 , ccb
2976                                 , atomic_read(&acb->ccboutstandingcount));
2977                         continue;
2978                 }
2979                 error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
2980                 arcmsr_report_ccb_state(acb, ccb, error);
2981         }
2982         return rtn;
2983 }
2984 
2985 static int arcmsr_hbaB_polling_ccbdone(struct AdapterControlBlock *acb,
2986                                         struct CommandControlBlock *poll_ccb)
2987 {
2988         struct MessageUnit_B *reg = acb->pmuB;
2989         struct ARCMSR_CDB *arcmsr_cdb;
2990         struct CommandControlBlock *ccb;
2991         uint32_t flag_ccb, poll_ccb_done = 0, poll_count = 0;
2992         int index, rtn;
2993         bool error;
2994         polling_hbb_ccb_retry:
2995 
2996         poll_count++;
2997         /* clear doorbell interrupt */
2998         writel(ARCMSR_DOORBELL_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
2999         while(1){
3000                 index = reg->doneq_index;
3001                 flag_ccb = reg->done_qbuffer[index];
3002                 if (flag_ccb == 0) {
3003                         if (poll_ccb_done){
3004                                 rtn = SUCCESS;
3005                                 break;
3006                         }else {
3007                                 msleep(25);
3008                                 if (poll_count > 100){
3009                                         rtn = FAILED;
3010                                         break;
3011                                 }
3012                                 goto polling_hbb_ccb_retry;
3013                         }
3014                 }
3015                 reg->done_qbuffer[index] = 0;
3016                 index++;
3017                 /*if last index number set it to 0 */
3018                 index %= ARCMSR_MAX_HBB_POSTQUEUE;
3019                 reg->doneq_index = index;
3020                 /* check if command done with no error*/
3021                 arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset + (flag_ccb << 5));
3022                 ccb = container_of(arcmsr_cdb, struct CommandControlBlock, arcmsr_cdb);
3023                 poll_ccb_done |= (ccb == poll_ccb) ? 1 : 0;
3024                 if ((ccb->acb != acb) || (ccb->startdone != ARCMSR_CCB_START)) {
3025                         if ((ccb->startdone == ARCMSR_CCB_ABORTED) || (ccb == poll_ccb)) {
3026                                 printk(KERN_NOTICE "arcmsr%d: scsi id = %d lun = %d ccb = '0x%p'"
3027                                         " poll command abort successfully \n"
3028                                         ,acb->host->host_no
3029                                         ,ccb->pcmd->device->id
3030                                         ,(u32)ccb->pcmd->device->lun
3031                                         ,ccb);
3032                                 ccb->pcmd->result = DID_ABORT << 16;
3033                                 arcmsr_ccb_complete(ccb);
3034                                 continue;
3035                         }
3036                         printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
3037                                 " command done ccb = '0x%p'"
3038                                 "ccboutstandingcount = %d \n"
3039                                 , acb->host->host_no
3040                                 , ccb
3041                                 , atomic_read(&acb->ccboutstandingcount));
3042                         continue;
3043                 } 
3044                 error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE0) ? true : false;
3045                 arcmsr_report_ccb_state(acb, ccb, error);
3046         }
3047         return rtn;
3048 }
3049 
3050 static int arcmsr_hbaC_polling_ccbdone(struct AdapterControlBlock *acb,
3051                 struct CommandControlBlock *poll_ccb)
3052 {
3053         struct MessageUnit_C __iomem *reg = acb->pmuC;
3054         uint32_t flag_ccb, ccb_cdb_phy;
3055         struct ARCMSR_CDB *arcmsr_cdb;
3056         bool error;
3057         struct CommandControlBlock *pCCB;
3058         uint32_t poll_ccb_done = 0, poll_count = 0;
3059         int rtn;
3060 polling_hbc_ccb_retry:
3061         poll_count++;
3062         while (1) {
3063                 if ((readl(&reg->host_int_status) & ARCMSR_HBCMU_OUTBOUND_POSTQUEUE_ISR) == 0) {
3064                         if (poll_ccb_done) {
3065                                 rtn = SUCCESS;
3066                                 break;
3067                         } else {
3068                                 msleep(25);
3069                                 if (poll_count > 100) {
3070                                         rtn = FAILED;
3071                                         break;
3072                                 }
3073                                 goto polling_hbc_ccb_retry;
3074                         }
3075                 }
3076                 flag_ccb = readl(&reg->outbound_queueport_low);
3077                 ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);
3078                 arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset + ccb_cdb_phy);/*frame must be 32 bytes aligned*/
3079                 pCCB = container_of(arcmsr_cdb, struct CommandControlBlock, arcmsr_cdb);
3080                 poll_ccb_done |= (pCCB == poll_ccb) ? 1 : 0;
3081                 /* check ifcommand done with no error*/
3082                 if ((pCCB->acb != acb) || (pCCB->startdone != ARCMSR_CCB_START)) {
3083                         if (pCCB->startdone == ARCMSR_CCB_ABORTED) {
3084                                 printk(KERN_NOTICE "arcmsr%d: scsi id = %d lun = %d ccb = '0x%p'"
3085                                         " poll command abort successfully \n"
3086                                         , acb->host->host_no
3087                                         , pCCB->pcmd->device->id
3088                                         , (u32)pCCB->pcmd->device->lun
3089                                         , pCCB);
3090                                         pCCB->pcmd->result = DID_ABORT << 16;
3091                                         arcmsr_ccb_complete(pCCB);
3092                                 continue;
3093                         }
3094                         printk(KERN_NOTICE "arcmsr%d: polling get an illegal ccb"
3095                                 " command done ccb = '0x%p'"
3096                                 "ccboutstandingcount = %d \n"
3097                                 , acb->host->host_no
3098                                 , pCCB
3099                                 , atomic_read(&acb->ccboutstandingcount));
3100                         continue;
3101                 }
3102                 error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1) ? true : false;
3103                 arcmsr_report_ccb_state(acb, pCCB, error);
3104         }
3105         return rtn;
3106 }
3107 
3108 static int arcmsr_hbaD_polling_ccbdone(struct AdapterControlBlock *acb,
3109                                 struct CommandControlBlock *poll_ccb)
3110 {
3111         bool error;
3112         uint32_t poll_ccb_done = 0, poll_count = 0, flag_ccb, ccb_cdb_phy;
3113         int rtn, doneq_index, index_stripped, outbound_write_pointer, toggle;
3114         unsigned long flags;
3115         struct ARCMSR_CDB *arcmsr_cdb;
3116         struct CommandControlBlock *pCCB;
3117         struct MessageUnit_D *pmu = acb->pmuD;
3118 
3119 polling_hbaD_ccb_retry:
3120         poll_count++;
3121         while (1) {
3122                 spin_lock_irqsave(&acb->doneq_lock, flags);
3123                 outbound_write_pointer = pmu->done_qbuffer[0].addressLow + 1;
3124                 doneq_index = pmu->doneq_index;
3125                 if ((outbound_write_pointer & 0xFFF) == (doneq_index & 0xFFF)) {
3126                         spin_unlock_irqrestore(&acb->doneq_lock, flags);
3127                         if (poll_ccb_done) {
3128                                 rtn = SUCCESS;
3129                                 break;
3130                         } else {
3131                                 msleep(25);
3132                                 if (poll_count > 40) {
3133                                         rtn = FAILED;
3134                                         break;
3135                                 }
3136                                 goto polling_hbaD_ccb_retry;
3137                         }
3138                 }
3139                 toggle = doneq_index & 0x4000;
3140                 index_stripped = (doneq_index & 0xFFF) + 1;
3141                 index_stripped %= ARCMSR_MAX_ARC1214_DONEQUEUE;
3142                 pmu->doneq_index = index_stripped ? (index_stripped | toggle) :
3143                                 ((toggle ^ 0x4000) + 1);
3144                 doneq_index = pmu->doneq_index;
3145                 spin_unlock_irqrestore(&acb->doneq_lock, flags);
3146                 flag_ccb = pmu->done_qbuffer[doneq_index & 0xFFF].addressLow;
3147                 ccb_cdb_phy = (flag_ccb & 0xFFFFFFF0);
3148                 arcmsr_cdb = (struct ARCMSR_CDB *)(acb->vir2phy_offset +
3149                         ccb_cdb_phy);
3150                 pCCB = container_of(arcmsr_cdb, struct CommandControlBlock,
3151                         arcmsr_cdb);
3152                 poll_ccb_done |= (pCCB == poll_ccb) ? 1 : 0;
3153                 if ((pCCB->acb != acb) ||
3154                         (pCCB->startdone != ARCMSR_CCB_START)) {
3155                         if (pCCB->startdone == ARCMSR_CCB_ABORTED) {
3156                                 pr_notice("arcmsr%d: scsi id = %d "
3157                                         "lun = %d ccb = '0x%p' poll command "
3158                                         "abort successfully\n"
3159                                         , acb->host->host_no
3160                                         , pCCB->pcmd->device->id
3161                                         , (u32)pCCB->pcmd->device->lun
3162                                         , pCCB);
3163                                 pCCB->pcmd->result = DID_ABORT << 16;
3164                                 arcmsr_ccb_complete(pCCB);
3165                                 continue;
3166                         }
3167                         pr_notice("arcmsr%d: polling an illegal "
3168                                 "ccb command done ccb = '0x%p' "
3169                                 "ccboutstandingcount = %d\n"
3170                                 , acb->host->host_no
3171                                 , pCCB
3172                                 , atomic_read(&acb->ccboutstandingcount));
3173                         continue;
3174                 }
3175                 error = (flag_ccb & ARCMSR_CCBREPLY_FLAG_ERROR_MODE1)
3176                         ? true : false;
3177                 arcmsr_report_ccb_state(acb, pCCB, error);
3178         }
3179         return rtn;
3180 }
3181 
3182 static int arcmsr_polling_ccbdone(struct AdapterControlBlock *acb,
3183                                         struct CommandControlBlock *poll_ccb)
3184 {
3185         int rtn = 0;
3186         switch (acb->adapter_type) {
3187 
3188         case ACB_ADAPTER_TYPE_A: {
3189                 rtn = arcmsr_hbaA_polling_ccbdone(acb, poll_ccb);
3190                 }
3191                 break;
3192 
3193         case ACB_ADAPTER_TYPE_B: {
3194                 rtn = arcmsr_hbaB_polling_ccbdone(acb, poll_ccb);
3195                 }
3196                 break;
3197         case ACB_ADAPTER_TYPE_C: {
3198                 rtn = arcmsr_hbaC_polling_ccbdone(acb, poll_ccb);
3199                 }
3200                 break;
3201         case ACB_ADAPTER_TYPE_D:
3202                 rtn = arcmsr_hbaD_polling_ccbdone(acb, poll_ccb);
3203                 break;
3204         }
3205         return rtn;
3206 }
3207 
3208 static int arcmsr_iop_confirm(struct AdapterControlBlock *acb)
3209 {
3210         uint32_t cdb_phyaddr, cdb_phyaddr_hi32;
3211         dma_addr_t dma_coherent_handle;
3212 
3213         /*
3214         ********************************************************************
3215         ** here we need to tell iop 331 our freeccb.HighPart
3216         ** if freeccb.HighPart is not zero
3217         ********************************************************************
3218         */
3219         switch (acb->adapter_type) {
3220         case ACB_ADAPTER_TYPE_B:
3221         case ACB_ADAPTER_TYPE_D:
3222                 dma_coherent_handle = acb->dma_coherent_handle2;
3223                 break;
3224         default:
3225                 dma_coherent_handle = acb->dma_coherent_handle;
3226                 break;
3227         }
3228         cdb_phyaddr = lower_32_bits(dma_coherent_handle);
3229         cdb_phyaddr_hi32 = upper_32_bits(dma_coherent_handle);
3230         acb->cdb_phyaddr_hi32 = cdb_phyaddr_hi32;
3231         /*
3232         ***********************************************************************
3233         **    if adapter type B, set window of "post command Q"
3234         ***********************************************************************
3235         */
3236         switch (acb->adapter_type) {
3237 
3238         case ACB_ADAPTER_TYPE_A: {
3239                 if (cdb_phyaddr_hi32 != 0) {
3240                         struct MessageUnit_A __iomem *reg = acb->pmuA;
3241                         writel(ARCMSR_SIGNATURE_SET_CONFIG, \
3242                                                 &reg->message_rwbuffer[0]);
3243                         writel(cdb_phyaddr_hi32, &reg->message_rwbuffer[1]);
3244                         writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, \
3245                                                         &reg->inbound_msgaddr0);
3246                         if (!arcmsr_hbaA_wait_msgint_ready(acb)) {
3247                                 printk(KERN_NOTICE "arcmsr%d: ""set ccb high \
3248                                 part physical address timeout\n",
3249                                 acb->host->host_no);
3250                                 return 1;
3251                         }
3252                 }
3253                 }
3254                 break;
3255 
3256         case ACB_ADAPTER_TYPE_B: {
3257                 uint32_t __iomem *rwbuffer;
3258 
3259                 struct MessageUnit_B *reg = acb->pmuB;
3260                 reg->postq_index = 0;
3261                 reg->doneq_index = 0;
3262                 writel(ARCMSR_MESSAGE_SET_POST_WINDOW, reg->drv2iop_doorbell);
3263                 if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
3264                         printk(KERN_NOTICE "arcmsr%d: cannot set driver mode\n", \
3265                                 acb->host->host_no);
3266                         return 1;
3267                 }
3268                 rwbuffer = reg->message_rwbuffer;
3269                 /* driver "set config" signature */
3270                 writel(ARCMSR_SIGNATURE_SET_CONFIG, rwbuffer++);
3271                 /* normal should be zero */
3272                 writel(cdb_phyaddr_hi32, rwbuffer++);
3273                 /* postQ size (256 + 8)*4        */
3274                 writel(cdb_phyaddr, rwbuffer++);
3275                 /* doneQ size (256 + 8)*4        */
3276                 writel(cdb_phyaddr + 1056, rwbuffer++);
3277                 /* ccb maxQ size must be --> [(256 + 8)*4]*/
3278                 writel(1056, rwbuffer);
3279 
3280                 writel(ARCMSR_MESSAGE_SET_CONFIG, reg->drv2iop_doorbell);
3281                 if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
3282                         printk(KERN_NOTICE "arcmsr%d: 'set command Q window' \
3283                         timeout \n",acb->host->host_no);
3284                         return 1;
3285                 }
3286                 writel(ARCMSR_MESSAGE_START_DRIVER_MODE, reg->drv2iop_doorbell);
3287                 if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
3288                         pr_err("arcmsr%d: can't set driver mode.\n",
3289                                 acb->host->host_no);
3290                         return 1;
3291                 }
3292                 }
3293                 break;
3294         case ACB_ADAPTER_TYPE_C: {
3295                 if (cdb_phyaddr_hi32 != 0) {
3296                         struct MessageUnit_C __iomem *reg = acb->pmuC;
3297 
3298                         printk(KERN_NOTICE "arcmsr%d: cdb_phyaddr_hi32=0x%x\n",
3299                                         acb->adapter_index, cdb_phyaddr_hi32);
3300                         writel(ARCMSR_SIGNATURE_SET_CONFIG, &reg->msgcode_rwbuffer[0]);
3301                         writel(cdb_phyaddr_hi32, &reg->msgcode_rwbuffer[1]);
3302                         writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, &reg->inbound_msgaddr0);
3303                         writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
3304                         if (!arcmsr_hbaC_wait_msgint_ready(acb)) {
3305                                 printk(KERN_NOTICE "arcmsr%d: 'set command Q window' \
3306                                 timeout \n", acb->host->host_no);
3307                                 return 1;
3308                         }
3309                 }
3310                 }
3311                 break;
3312         case ACB_ADAPTER_TYPE_D: {
3313                 uint32_t __iomem *rwbuffer;
3314                 struct MessageUnit_D *reg = acb->pmuD;
3315                 reg->postq_index = 0;
3316                 reg->doneq_index = 0;
3317                 rwbuffer = reg->msgcode_rwbuffer;
3318                 writel(ARCMSR_SIGNATURE_SET_CONFIG, rwbuffer++);
3319                 writel(cdb_phyaddr_hi32, rwbuffer++);
3320                 writel(cdb_phyaddr, rwbuffer++);
3321                 writel(cdb_phyaddr + (ARCMSR_MAX_ARC1214_POSTQUEUE *
3322                         sizeof(struct InBound_SRB)), rwbuffer++);
3323                 writel(0x100, rwbuffer);
3324                 writel(ARCMSR_INBOUND_MESG0_SET_CONFIG, reg->inbound_msgaddr0);
3325                 if (!arcmsr_hbaD_wait_msgint_ready(acb)) {
3326                         pr_notice("arcmsr%d: 'set command Q window' timeout\n",
3327                                 acb->host->host_no);
3328                         return 1;
3329                 }
3330                 }
3331                 break;
3332         }
3333         return 0;
3334 }
3335 
3336 static void arcmsr_wait_firmware_ready(struct AdapterControlBlock *acb)
3337 {
3338         uint32_t firmware_state = 0;
3339         switch (acb->adapter_type) {
3340 
3341         case ACB_ADAPTER_TYPE_A: {
3342                 struct MessageUnit_A __iomem *reg = acb->pmuA;
3343                 do {
3344                         firmware_state = readl(&reg->outbound_msgaddr1);
3345                 } while ((firmware_state & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK) == 0);
3346                 }
3347                 break;
3348 
3349         case ACB_ADAPTER_TYPE_B: {
3350                 struct MessageUnit_B *reg = acb->pmuB;
3351                 do {
3352                         firmware_state = readl(reg->iop2drv_doorbell);
3353                 } while ((firmware_state & ARCMSR_MESSAGE_FIRMWARE_OK) == 0);
3354                 writel(ARCMSR_DRV2IOP_END_OF_INTERRUPT, reg->drv2iop_doorbell);
3355                 }
3356                 break;
3357         case ACB_ADAPTER_TYPE_C: {
3358                 struct MessageUnit_C __iomem *reg = acb->pmuC;
3359                 do {
3360                         firmware_state = readl(&reg->outbound_msgaddr1);
3361                 } while ((firmware_state & ARCMSR_HBCMU_MESSAGE_FIRMWARE_OK) == 0);
3362                 }
3363                 break;
3364         case ACB_ADAPTER_TYPE_D: {
3365                 struct MessageUnit_D *reg = acb->pmuD;
3366                 do {
3367                         firmware_state = readl(reg->outbound_msgaddr1);
3368                 } while ((firmware_state &
3369                         ARCMSR_ARC1214_MESSAGE_FIRMWARE_OK) == 0);
3370                 }
3371                 break;
3372         }
3373 }
3374 
3375 static void arcmsr_hbaA_request_device_map(struct AdapterControlBlock *acb)
3376 {
3377         struct MessageUnit_A __iomem *reg = acb->pmuA;
3378         if (unlikely(atomic_read(&acb->rq_map_token) == 0) || ((acb->acb_flags & ACB_F_BUS_RESET) != 0 ) || ((acb->acb_flags & ACB_F_ABORT) != 0 )){
3379                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3380                 return;
3381         } else {
3382                 acb->fw_flag = FW_NORMAL;
3383                 if (atomic_read(&acb->ante_token_value) == atomic_read(&acb->rq_map_token)){
3384                         atomic_set(&acb->rq_map_token, 16);
3385                 }
3386                 atomic_set(&acb->ante_token_value, atomic_read(&acb->rq_map_token));
3387                 if (atomic_dec_and_test(&acb->rq_map_token)) {
3388                         mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3389                         return;
3390                 }
3391                 writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
3392                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3393         }
3394         return;
3395 }
3396 
3397 static void arcmsr_hbaB_request_device_map(struct AdapterControlBlock *acb)
3398 {
3399         struct MessageUnit_B *reg = acb->pmuB;
3400         if (unlikely(atomic_read(&acb->rq_map_token) == 0) || ((acb->acb_flags & ACB_F_BUS_RESET) != 0 ) || ((acb->acb_flags & ACB_F_ABORT) != 0 )){
3401                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3402                 return;
3403         } else {
3404                 acb->fw_flag = FW_NORMAL;
3405                 if (atomic_read(&acb->ante_token_value) == atomic_read(&acb->rq_map_token)) {
3406                         atomic_set(&acb->rq_map_token, 16);
3407                 }
3408                 atomic_set(&acb->ante_token_value, atomic_read(&acb->rq_map_token));
3409                 if (atomic_dec_and_test(&acb->rq_map_token)) {
3410                         mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3411                         return;
3412                 }
3413                 writel(ARCMSR_MESSAGE_GET_CONFIG, reg->drv2iop_doorbell);
3414                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3415         }
3416         return;
3417 }
3418 
3419 static void arcmsr_hbaC_request_device_map(struct AdapterControlBlock *acb)
3420 {
3421         struct MessageUnit_C __iomem *reg = acb->pmuC;
3422         if (unlikely(atomic_read(&acb->rq_map_token) == 0) || ((acb->acb_flags & ACB_F_BUS_RESET) != 0) || ((acb->acb_flags & ACB_F_ABORT) != 0)) {
3423                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3424                 return;
3425         } else {
3426                 acb->fw_flag = FW_NORMAL;
3427                 if (atomic_read(&acb->ante_token_value) == atomic_read(&acb->rq_map_token)) {
3428                         atomic_set(&acb->rq_map_token, 16);
3429                 }
3430                 atomic_set(&acb->ante_token_value, atomic_read(&acb->rq_map_token));
3431                 if (atomic_dec_and_test(&acb->rq_map_token)) {
3432                         mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3433                         return;
3434                 }
3435                 writel(ARCMSR_INBOUND_MESG0_GET_CONFIG, &reg->inbound_msgaddr0);
3436                 writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &reg->inbound_doorbell);
3437                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3438         }
3439         return;
3440 }
3441 
3442 static void arcmsr_hbaD_request_device_map(struct AdapterControlBlock *acb)
3443 {
3444         struct MessageUnit_D *reg = acb->pmuD;
3445 
3446         if (unlikely(atomic_read(&acb->rq_map_token) == 0) ||
3447                 ((acb->acb_flags & ACB_F_BUS_RESET) != 0) ||
3448                 ((acb->acb_flags & ACB_F_ABORT) != 0)) {
3449                 mod_timer(&acb->eternal_timer,
3450                         jiffies + msecs_to_jiffies(6 * HZ));
3451         } else {
3452                 acb->fw_flag = FW_NORMAL;
3453                 if (atomic_read(&acb->ante_token_value) ==
3454                         atomic_read(&acb->rq_map_token)) {
3455                         atomic_set(&acb->rq_map_token, 16);
3456                 }
3457                 atomic_set(&acb->ante_token_value,
3458                         atomic_read(&acb->rq_map_token));
3459                 if (atomic_dec_and_test(&acb->rq_map_token)) {
3460                         mod_timer(&acb->eternal_timer, jiffies +
3461                                 msecs_to_jiffies(6 * HZ));
3462                         return;
3463                 }
3464                 writel(ARCMSR_INBOUND_MESG0_GET_CONFIG,
3465                         reg->inbound_msgaddr0);
3466                 mod_timer(&acb->eternal_timer, jiffies +
3467                         msecs_to_jiffies(6 * HZ));
3468         }
3469 }
3470 
3471 static void arcmsr_request_device_map(unsigned long pacb)
3472 {
3473         struct AdapterControlBlock *acb = (struct AdapterControlBlock *)pacb;
3474         switch (acb->adapter_type) {
3475                 case ACB_ADAPTER_TYPE_A: {
3476                         arcmsr_hbaA_request_device_map(acb);
3477                 }
3478                 break;
3479                 case ACB_ADAPTER_TYPE_B: {
3480                         arcmsr_hbaB_request_device_map(acb);
3481                 }
3482                 break;
3483                 case ACB_ADAPTER_TYPE_C: {
3484                         arcmsr_hbaC_request_device_map(acb);
3485                 }
3486                 break;
3487                 case ACB_ADAPTER_TYPE_D:
3488                         arcmsr_hbaD_request_device_map(acb);
3489                 break;
3490         }
3491 }
3492 
3493 static void arcmsr_hbaA_start_bgrb(struct AdapterControlBlock *acb)
3494 {
3495         struct MessageUnit_A __iomem *reg = acb->pmuA;
3496         acb->acb_flags |= ACB_F_MSG_START_BGRB;
3497         writel(ARCMSR_INBOUND_MESG0_START_BGRB, &reg->inbound_msgaddr0);
3498         if (!arcmsr_hbaA_wait_msgint_ready(acb)) {
3499                 printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
3500                                 rebulid' timeout \n", acb->host->host_no);
3501         }
3502 }
3503 
3504 static void arcmsr_hbaB_start_bgrb(struct AdapterControlBlock *acb)
3505 {
3506         struct MessageUnit_B *reg = acb->pmuB;
3507         acb->acb_flags |= ACB_F_MSG_START_BGRB;
3508         writel(ARCMSR_MESSAGE_START_BGRB, reg->drv2iop_doorbell);
3509         if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
3510                 printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
3511                                 rebulid' timeout \n",acb->host->host_no);
3512         }
3513 }
3514 
3515 static void arcmsr_hbaC_start_bgrb(struct AdapterControlBlock *pACB)
3516 {
3517         struct MessageUnit_C __iomem *phbcmu = pACB->pmuC;
3518         pACB->acb_flags |= ACB_F_MSG_START_BGRB;
3519         writel(ARCMSR_INBOUND_MESG0_START_BGRB, &phbcmu->inbound_msgaddr0);
3520         writel(ARCMSR_HBCMU_DRV2IOP_MESSAGE_CMD_DONE, &phbcmu->inbound_doorbell);
3521         if (!arcmsr_hbaC_wait_msgint_ready(pACB)) {
3522                 printk(KERN_NOTICE "arcmsr%d: wait 'start adapter background \
3523                                 rebulid' timeout \n", pACB->host->host_no);
3524         }
3525         return;
3526 }
3527 
3528 static void arcmsr_hbaD_start_bgrb(struct AdapterControlBlock *pACB)
3529 {
3530         struct MessageUnit_D *pmu = pACB->pmuD;
3531 
3532         pACB->acb_flags |= ACB_F_MSG_START_BGRB;
3533         writel(ARCMSR_INBOUND_MESG0_START_BGRB, pmu->inbound_msgaddr0);
3534         if (!arcmsr_hbaD_wait_msgint_ready(pACB)) {
3535                 pr_notice("arcmsr%d: wait 'start adapter "
3536                         "background rebulid' timeout\n", pACB->host->host_no);
3537         }
3538 }
3539 
3540 static void arcmsr_start_adapter_bgrb(struct AdapterControlBlock *acb)
3541 {
3542         switch (acb->adapter_type) {
3543         case ACB_ADAPTER_TYPE_A:
3544                 arcmsr_hbaA_start_bgrb(acb);
3545                 break;
3546         case ACB_ADAPTER_TYPE_B:
3547                 arcmsr_hbaB_start_bgrb(acb);
3548                 break;
3549         case ACB_ADAPTER_TYPE_C:
3550                 arcmsr_hbaC_start_bgrb(acb);
3551                 break;
3552         case ACB_ADAPTER_TYPE_D:
3553                 arcmsr_hbaD_start_bgrb(acb);
3554                 break;
3555         }
3556 }
3557 
3558 static void arcmsr_clear_doorbell_queue_buffer(struct AdapterControlBlock *acb)
3559 {
3560         switch (acb->adapter_type) {
3561         case ACB_ADAPTER_TYPE_A: {
3562                 struct MessageUnit_A __iomem *reg = acb->pmuA;
3563                 uint32_t outbound_doorbell;
3564                 /* empty doorbell Qbuffer if door bell ringed */
3565                 outbound_doorbell = readl(&reg->outbound_doorbell);
3566                 /*clear doorbell interrupt */
3567                 writel(outbound_doorbell, &reg->outbound_doorbell);
3568                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
3569                 }
3570                 break;
3571 
3572         case ACB_ADAPTER_TYPE_B: {
3573                 struct MessageUnit_B *reg = acb->pmuB;
3574                 /*clear interrupt and message state*/
3575                 writel(ARCMSR_MESSAGE_INT_CLEAR_PATTERN, reg->iop2drv_doorbell);
3576                 writel(ARCMSR_DRV2IOP_DATA_READ_OK, reg->drv2iop_doorbell);
3577                 /* let IOP know data has been read */
3578                 }
3579                 break;
3580         case ACB_ADAPTER_TYPE_C: {
3581                 struct MessageUnit_C __iomem *reg = acb->pmuC;
3582                 uint32_t outbound_doorbell, i;
3583                 /* empty doorbell Qbuffer if door bell ringed */
3584                 outbound_doorbell = readl(&reg->outbound_doorbell);
3585                 writel(outbound_doorbell, &reg->outbound_doorbell_clear);
3586                 writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK, &reg->inbound_doorbell);
3587                 for (i = 0; i < 200; i++) {
3588                         msleep(20);
3589                         outbound_doorbell = readl(&reg->outbound_doorbell);
3590                         if (outbound_doorbell &
3591                                 ARCMSR_HBCMU_IOP2DRV_DATA_WRITE_OK) {
3592                                 writel(outbound_doorbell,
3593                                         &reg->outbound_doorbell_clear);
3594                                 writel(ARCMSR_HBCMU_DRV2IOP_DATA_READ_OK,
3595                                         &reg->inbound_doorbell);
3596                         } else
3597                                 break;
3598                 }
3599                 }
3600                 break;
3601         case ACB_ADAPTER_TYPE_D: {
3602                 struct MessageUnit_D *reg = acb->pmuD;
3603                 uint32_t outbound_doorbell, i;
3604                 /* empty doorbell Qbuffer if door bell ringed */
3605                 outbound_doorbell = readl(reg->outbound_doorbell);
3606                 writel(outbound_doorbell, reg->outbound_doorbell);
3607                 writel(ARCMSR_ARC1214_DRV2IOP_DATA_OUT_READ,
3608                         reg->inbound_doorbell);
3609                 for (i = 0; i < 200; i++) {
3610                         msleep(20);
3611                         outbound_doorbell = readl(reg->outbound_doorbell);
3612                         if (outbound_doorbell &
3613                                 ARCMSR_ARC1214_IOP2DRV_DATA_WRITE_OK) {
3614                                 writel(outbound_doorbell,
3615                                         reg->outbound_doorbell);
3616                                 writel(ARCMSR_ARC1214_DRV2IOP_DATA_OUT_READ,
3617                                         reg->inbound_doorbell);
3618                         } else
3619                                 break;
3620                 }
3621                 }
3622                 break;
3623         }
3624 }
3625 
3626 static void arcmsr_enable_eoi_mode(struct AdapterControlBlock *acb)
3627 {
3628         switch (acb->adapter_type) {
3629         case ACB_ADAPTER_TYPE_A:
3630                 return;
3631         case ACB_ADAPTER_TYPE_B:
3632                 {
3633                         struct MessageUnit_B *reg = acb->pmuB;
3634                         writel(ARCMSR_MESSAGE_ACTIVE_EOI_MODE, reg->drv2iop_doorbell);
3635                         if (!arcmsr_hbaB_wait_msgint_ready(acb)) {
3636                                 printk(KERN_NOTICE "ARCMSR IOP enables EOI_MODE TIMEOUT");
3637                                 return;
3638                         }
3639                 }
3640                 break;
3641         case ACB_ADAPTER_TYPE_C:
3642                 return;
3643         }
3644         return;
3645 }
3646 
3647 static void arcmsr_hardware_reset(struct AdapterControlBlock *acb)
3648 {
3649         uint8_t value[64];
3650         int i, count = 0;
3651         struct MessageUnit_A __iomem *pmuA = acb->pmuA;
3652         struct MessageUnit_C __iomem *pmuC = acb->pmuC;
3653         struct MessageUnit_D *pmuD = acb->pmuD;
3654 
3655         /* backup pci config data */
3656         printk(KERN_NOTICE "arcmsr%d: executing hw bus reset .....\n", acb->host->host_no);
3657         for (i = 0; i < 64; i++) {
3658                 pci_read_config_byte(acb->pdev, i, &value[i]);
3659         }
3660         /* hardware reset signal */
3661         if ((acb->dev_id == 0x1680)) {
3662                 writel(ARCMSR_ARC1680_BUS_RESET, &pmuA->reserved1[0]);
3663         } else if ((acb->dev_id == 0x1880)) {
3664                 do {
3665                         count++;
3666                         writel(0xF, &pmuC->write_sequence);
3667                         writel(0x4, &pmuC->write_sequence);
3668                         writel(0xB, &pmuC->write_sequence);
3669                         writel(0x2, &pmuC->write_sequence);
3670                         writel(0x7, &pmuC->write_sequence);
3671                         writel(0xD, &pmuC->write_sequence);
3672                 } while (((readl(&pmuC->host_diagnostic) & ARCMSR_ARC1880_DiagWrite_ENABLE) == 0) && (count < 5));
3673                 writel(ARCMSR_ARC1880_RESET_ADAPTER, &pmuC->host_diagnostic);
3674         } else if ((acb->dev_id == 0x1214)) {
3675                 writel(0x20, pmuD->reset_request);
3676         } else {
3677                 pci_write_config_byte(acb->pdev, 0x84, 0x20);
3678         }
3679         msleep(2000);
3680         /* write back pci config data */
3681         for (i = 0; i < 64; i++) {
3682                 pci_write_config_byte(acb->pdev, i, value[i]);
3683         }
3684         msleep(1000);
3685         return;
3686 }
3687 static void arcmsr_iop_init(struct AdapterControlBlock *acb)
3688 {
3689         uint32_t intmask_org;
3690         /* disable all outbound interrupt */
3691         intmask_org = arcmsr_disable_outbound_ints(acb);
3692         arcmsr_wait_firmware_ready(acb);
3693         arcmsr_iop_confirm(acb);
3694         /*start background rebuild*/
3695         arcmsr_start_adapter_bgrb(acb);
3696         /* empty doorbell Qbuffer if door bell ringed */
3697         arcmsr_clear_doorbell_queue_buffer(acb);
3698         arcmsr_enable_eoi_mode(acb);
3699         /* enable outbound Post Queue,outbound doorbell Interrupt */
3700         arcmsr_enable_outbound_ints(acb, intmask_org);
3701         acb->acb_flags |= ACB_F_IOP_INITED;
3702 }
3703 
3704 static uint8_t arcmsr_iop_reset(struct AdapterControlBlock *acb)
3705 {
3706         struct CommandControlBlock *ccb;
3707         uint32_t intmask_org;
3708         uint8_t rtnval = 0x00;
3709         int i = 0;
3710         unsigned long flags;
3711 
3712         if (atomic_read(&acb->ccboutstandingcount) != 0) {
3713                 /* disable all outbound interrupt */
3714                 intmask_org = arcmsr_disable_outbound_ints(acb);
3715                 /* talk to iop 331 outstanding command aborted */
3716                 rtnval = arcmsr_abort_allcmd(acb);
3717                 /* clear all outbound posted Q */
3718                 arcmsr_done4abort_postqueue(acb);
3719                 for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
3720                         ccb = acb->pccb_pool[i];
3721                         if (ccb->startdone == ARCMSR_CCB_START) {
3722                                 scsi_dma_unmap(ccb->pcmd);
3723                                 ccb->startdone = ARCMSR_CCB_DONE;
3724                                 ccb->ccb_flags = 0;
3725                                 spin_lock_irqsave(&acb->ccblist_lock, flags);
3726                                 list_add_tail(&ccb->list, &acb->ccb_free_list);
3727                                 spin_unlock_irqrestore(&acb->ccblist_lock, flags);
3728                         }
3729                 }
3730                 atomic_set(&acb->ccboutstandingcount, 0);
3731                 /* enable all outbound interrupt */
3732                 arcmsr_enable_outbound_ints(acb, intmask_org);
3733                 return rtnval;
3734         }
3735         return rtnval;
3736 }
3737 
3738 static int arcmsr_bus_reset(struct scsi_cmnd *cmd)
3739 {
3740         struct AdapterControlBlock *acb;
3741         uint32_t intmask_org, outbound_doorbell;
3742         int retry_count = 0;
3743         int rtn = FAILED;
3744         acb = (struct AdapterControlBlock *) cmd->device->host->hostdata;
3745         printk(KERN_ERR "arcmsr: executing bus reset eh.....num_resets = %d, num_aborts = %d \n", acb->num_resets, acb->num_aborts);
3746         acb->num_resets++;
3747 
3748         switch(acb->adapter_type){
3749                 case ACB_ADAPTER_TYPE_A:{
3750                         if (acb->acb_flags & ACB_F_BUS_RESET){
3751                                 long timeout;
3752                                 printk(KERN_ERR "arcmsr: there is an  bus reset eh proceeding.......\n");
3753                                 timeout = wait_event_timeout(wait_q, (acb->acb_flags & ACB_F_BUS_RESET) == 0, 220*HZ);
3754                                 if (timeout) {
3755                                         return SUCCESS;
3756                                 }
3757                         }
3758                         acb->acb_flags |= ACB_F_BUS_RESET;
3759                         if (!arcmsr_iop_reset(acb)) {
3760                                 struct MessageUnit_A __iomem *reg;
3761                                 reg = acb->pmuA;
3762                                 arcmsr_hardware_reset(acb);
3763                                 acb->acb_flags &= ~ACB_F_IOP_INITED;
3764 sleep_again:
3765                                 ssleep(ARCMSR_SLEEPTIME);
3766                                 if ((readl(&reg->outbound_msgaddr1) & ARCMSR_OUTBOUND_MESG1_FIRMWARE_OK) == 0) {
3767                                         printk(KERN_ERR "arcmsr%d: waiting for hw bus reset return, retry=%d\n", acb->host->host_no, retry_count);
3768                                         if (retry_count > ARCMSR_RETRYCOUNT) {
3769                                                 acb->fw_flag = FW_DEADLOCK;
3770                                                 printk(KERN_ERR "arcmsr%d: waiting for hw bus reset return, RETRY TERMINATED!!\n", acb->host->host_no);
3771                                                 return FAILED;
3772                                         }
3773                                         retry_count++;
3774                                         goto sleep_again;
3775                                 }
3776                                 acb->acb_flags |= ACB_F_IOP_INITED;
3777                                 /* disable all outbound interrupt */
3778                                 intmask_org = arcmsr_disable_outbound_ints(acb);
3779                                 arcmsr_get_firmware_spec(acb);
3780                                 arcmsr_start_adapter_bgrb(acb);
3781                                 /* clear Qbuffer if door bell ringed */
3782                                 outbound_doorbell = readl(&reg->outbound_doorbell);
3783                                 writel(outbound_doorbell, &reg->outbound_doorbell); /*clear interrupt */
3784                                 writel(ARCMSR_INBOUND_DRIVER_DATA_READ_OK, &reg->inbound_doorbell);
3785                                 /* enable outbound Post Queue,outbound doorbell Interrupt */
3786                                 arcmsr_enable_outbound_ints(acb, intmask_org);
3787                                 atomic_set(&acb->rq_map_token, 16);
3788                                 atomic_set(&acb->ante_token_value, 16);
3789                                 acb->fw_flag = FW_NORMAL;
3790                                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3791                                 acb->acb_flags &= ~ACB_F_BUS_RESET;
3792                                 rtn = SUCCESS;
3793                                 printk(KERN_ERR "arcmsr: scsi  bus reset eh returns with success\n");
3794                         } else {
3795                                 acb->acb_flags &= ~ACB_F_BUS_RESET;
3796                                 atomic_set(&acb->rq_map_token, 16);
3797                                 atomic_set(&acb->ante_token_value, 16);
3798                                 acb->fw_flag = FW_NORMAL;
3799                                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6*HZ));
3800                                 rtn = SUCCESS;
3801                         }
3802                         break;
3803                 }
3804                 case ACB_ADAPTER_TYPE_B:{
3805                         acb->acb_flags |= ACB_F_BUS_RESET;
3806                         if (!arcmsr_iop_reset(acb)) {
3807                                 acb->acb_flags &= ~ACB_F_BUS_RESET;
3808                                 rtn = FAILED;
3809                         } else {
3810                                 acb->acb_flags &= ~ACB_F_BUS_RESET;
3811                                 atomic_set(&acb->rq_map_token, 16);
3812                                 atomic_set(&acb->ante_token_value, 16);
3813                                 acb->fw_flag = FW_NORMAL;
3814                                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3815                                 rtn = SUCCESS;
3816                         }
3817                         break;
3818                 }
3819                 case ACB_ADAPTER_TYPE_C:{
3820                         if (acb->acb_flags & ACB_F_BUS_RESET) {
3821                                 long timeout;
3822                                 printk(KERN_ERR "arcmsr: there is an bus reset eh proceeding.......\n");
3823                                 timeout = wait_event_timeout(wait_q, (acb->acb_flags & ACB_F_BUS_RESET) == 0, 220*HZ);
3824                                 if (timeout) {
3825                                         return SUCCESS;
3826                                 }
3827                         }
3828                         acb->acb_flags |= ACB_F_BUS_RESET;
3829                         if (!arcmsr_iop_reset(acb)) {
3830                                 struct MessageUnit_C __iomem *reg;
3831                                 reg = acb->pmuC;
3832                                 arcmsr_hardware_reset(acb);
3833                                 acb->acb_flags &= ~ACB_F_IOP_INITED;
3834 sleep:
3835                                 ssleep(ARCMSR_SLEEPTIME);
3836                                 if ((readl(&reg->host_diagnostic) & 0x04) != 0) {
3837                                         printk(KERN_ERR "arcmsr%d: waiting for hw bus reset return, retry=%d\n", acb->host->host_no, retry_count);
3838                                         if (retry_count > ARCMSR_RETRYCOUNT) {
3839                                                 acb->fw_flag = FW_DEADLOCK;
3840                                                 printk(KERN_ERR "arcmsr%d: waiting for hw bus reset return, RETRY TERMINATED!!\n", acb->host->host_no);
3841                                                 return FAILED;
3842                                         }
3843                                         retry_count++;
3844                                         goto sleep;
3845                                 }
3846                                 acb->acb_flags |= ACB_F_IOP_INITED;
3847                                 /* disable all outbound interrupt */
3848                                 intmask_org = arcmsr_disable_outbound_ints(acb);
3849                                 arcmsr_get_firmware_spec(acb);
3850                                 arcmsr_start_adapter_bgrb(acb);
3851                                 /* clear Qbuffer if door bell ringed */
3852                                 arcmsr_clear_doorbell_queue_buffer(acb);
3853                                 /* enable outbound Post Queue,outbound doorbell Interrupt */
3854                                 arcmsr_enable_outbound_ints(acb, intmask_org);
3855                                 atomic_set(&acb->rq_map_token, 16);
3856                                 atomic_set(&acb->ante_token_value, 16);
3857                                 acb->fw_flag = FW_NORMAL;
3858                                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6 * HZ));
3859                                 acb->acb_flags &= ~ACB_F_BUS_RESET;
3860                                 rtn = SUCCESS;
3861                                 printk(KERN_ERR "arcmsr: scsi bus reset eh returns with success\n");
3862                         } else {
3863                                 acb->acb_flags &= ~ACB_F_BUS_RESET;
3864                                 atomic_set(&acb->rq_map_token, 16);
3865                                 atomic_set(&acb->ante_token_value, 16);
3866                                 acb->fw_flag = FW_NORMAL;
3867                                 mod_timer(&acb->eternal_timer, jiffies + msecs_to_jiffies(6*HZ));
3868                                 rtn = SUCCESS;
3869                         }
3870                         break;
3871                 }
3872                 case ACB_ADAPTER_TYPE_D: {
3873                         if (acb->acb_flags & ACB_F_BUS_RESET) {
3874                                 long timeout;
3875                                 pr_notice("arcmsr: there is an bus reset"
3876                                         " eh proceeding.......\n");
3877                                 timeout = wait_event_timeout(wait_q, (acb->acb_flags
3878                                         & ACB_F_BUS_RESET) == 0, 220 * HZ);
3879                                 if (timeout)
3880                                         return SUCCESS;
3881                         }
3882                         acb->acb_flags |= ACB_F_BUS_RESET;
3883                         if (!arcmsr_iop_reset(acb)) {
3884                                 struct MessageUnit_D *reg;
3885                                 reg = acb->pmuD;
3886                                 arcmsr_hardware_reset(acb);
3887                                 acb->acb_flags &= ~ACB_F_IOP_INITED;
3888                         nap:
3889                                 ssleep(ARCMSR_SLEEPTIME);
3890                                 if ((readl(reg->sample_at_reset) & 0x80) != 0) {
3891                                         pr_err("arcmsr%d: waiting for "
3892                                                 "hw bus reset return, retry=%d\n",
3893                                                 acb->host->host_no, retry_count);
3894                                         if (retry_count > ARCMSR_RETRYCOUNT) {
3895                                                 acb->fw_flag = FW_DEADLOCK;
3896                                                 pr_err("arcmsr%d: waiting for hw bus"
3897                                                         " reset return, "
3898                                                         "RETRY TERMINATED!!\n",
3899                                                         acb->host->host_no);
3900                                                 return FAILED;
3901                                         }
3902                                         retry_count++;
3903                                         goto nap;
3904                                 }
3905                                 acb->acb_flags |= ACB_F_IOP_INITED;
3906                                 /* disable all outbound interrupt */
3907                                 intmask_org = arcmsr_disable_outbound_ints(acb);
3908                                 arcmsr_get_firmware_spec(acb);
3909                                 arcmsr_start_adapter_bgrb(acb);
3910                                 arcmsr_clear_doorbell_queue_buffer(acb);
3911                                 arcmsr_enable_outbound_ints(acb, intmask_org);
3912                                 atomic_set(&acb->rq_map_token, 16);
3913                                 atomic_set(&acb->ante_token_value, 16);
3914                                 acb->fw_flag = FW_NORMAL;
3915                                 mod_timer(&acb->eternal_timer,
3916                                         jiffies + msecs_to_jiffies(6 * HZ));
3917                                 acb->acb_flags &= ~ACB_F_BUS_RESET;
3918                                 rtn = SUCCESS;
3919                                 pr_err("arcmsr: scsi bus reset "
3920                                         "eh returns with success\n");
3921                         } else {
3922                                 acb->acb_flags &= ~ACB_F_BUS_RESET;
3923                                 atomic_set(&acb->rq_map_token, 16);
3924                                 atomic_set(&acb->ante_token_value, 16);
3925                                 acb->fw_flag = FW_NORMAL;
3926                                 mod_timer(&acb->eternal_timer,
3927                                         jiffies + msecs_to_jiffies(6 * HZ));
3928                                 rtn = SUCCESS;
3929                         }
3930                         break;
3931                 }
3932         }
3933         return rtn;
3934 }
3935 
3936 static int arcmsr_abort_one_cmd(struct AdapterControlBlock *acb,
3937                 struct CommandControlBlock *ccb)
3938 {
3939         int rtn;
3940         rtn = arcmsr_polling_ccbdone(acb, ccb);
3941         return rtn;
3942 }
3943 
3944 static int arcmsr_abort(struct scsi_cmnd *cmd)
3945 {
3946         struct AdapterControlBlock *acb =
3947                 (struct AdapterControlBlock *)cmd->device->host->hostdata;
3948         int i = 0;
3949         int rtn = FAILED;
3950         uint32_t intmask_org;
3951 
3952         printk(KERN_NOTICE
3953                 "arcmsr%d: abort device command of scsi id = %d lun = %d\n",
3954                 acb->host->host_no, cmd->device->id, (u32)cmd->device->lun);
3955         acb->acb_flags |= ACB_F_ABORT;
3956         acb->num_aborts++;
3957         /*
3958         ************************************************
3959         ** the all interrupt service routine is locked
3960         ** we need to handle it as soon as possible and exit
3961         ************************************************
3962         */
3963         if (!atomic_read(&acb->ccboutstandingcount)) {
3964                 acb->acb_flags &= ~ACB_F_ABORT;
3965                 return rtn;
3966         }
3967 
3968         intmask_org = arcmsr_disable_outbound_ints(acb);
3969         for (i = 0; i < ARCMSR_MAX_FREECCB_NUM; i++) {
3970                 struct CommandControlBlock *ccb = acb->pccb_pool[i];
3971                 if (ccb->startdone == ARCMSR_CCB_START && ccb->pcmd == cmd) {
3972                         ccb->startdone = ARCMSR_CCB_ABORTED;
3973                         rtn = arcmsr_abort_one_cmd(acb, ccb);
3974                         break;
3975                 }
3976         }
3977         acb->acb_flags &= ~ACB_F_ABORT;
3978         arcmsr_enable_outbound_ints(acb, intmask_org);
3979         return rtn;
3980 }
3981 
3982 static const char *arcmsr_info(struct Scsi_Host *host)
3983 {
3984         struct AdapterControlBlock *acb =
3985                 (struct AdapterControlBlock *) host->hostdata;
3986         static char buf[256];
3987         char *type;
3988         int raid6 = 1;
3989         switch (acb->pdev->device) {
3990         case PCI_DEVICE_ID_ARECA_1110:
3991         case PCI_DEVICE_ID_ARECA_1200:
3992         case PCI_DEVICE_ID_ARECA_1202:
3993         case PCI_DEVICE_ID_ARECA_1210:
3994                 raid6 = 0;
3995                 /*FALLTHRU*/
3996         case PCI_DEVICE_ID_ARECA_1120:
3997         case PCI_DEVICE_ID_ARECA_1130:
3998         case PCI_DEVICE_ID_ARECA_1160:
3999         case PCI_DEVICE_ID_ARECA_1170:
4000         case PCI_DEVICE_ID_ARECA_1201:
4001         case PCI_DEVICE_ID_ARECA_1220:
4002         case PCI_DEVICE_ID_ARECA_1230:
4003         case PCI_DEVICE_ID_ARECA_1260:
4004         case PCI_DEVICE_ID_ARECA_1270:
4005         case PCI_DEVICE_ID_ARECA_1280:
4006                 type = "SATA";
4007                 break;
4008         case PCI_DEVICE_ID_ARECA_1214:
4009         case PCI_DEVICE_ID_ARECA_1380:
4010         case PCI_DEVICE_ID_ARECA_1381:
4011         case PCI_DEVICE_ID_ARECA_1680:
4012         case PCI_DEVICE_ID_ARECA_1681:
4013         case PCI_DEVICE_ID_ARECA_1880:
4014                 type = "SAS/SATA";
4015                 break;
4016         default:
4017                 type = "unknown";
4018                 raid6 = 0;
4019                 break;
4020         }
4021         sprintf(buf, "Areca %s RAID Controller %s\narcmsr version %s\n",
4022                 type, raid6 ? "(RAID6 capable)" : "", ARCMSR_DRIVER_VERSION);
4023         return buf;
4024 }
4025 

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