Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16

Linux/drivers/scsi/qlogicpti.c

  1 /* qlogicpti.c: Performance Technologies QlogicISP sbus card driver.
  2  *
  3  * Copyright (C) 1996, 2006, 2008 David S. Miller (davem@davemloft.net)
  4  *
  5  * A lot of this driver was directly stolen from Erik H. Moe's PCI
  6  * Qlogic ISP driver.  Mucho kudos to him for this code.
  7  *
  8  * An even bigger kudos to John Grana at Performance Technologies
  9  * for providing me with the hardware to write this driver, you rule
 10  * John you really do.
 11  *
 12  * May, 2, 1997: Added support for QLGC,isp --jj
 13  */
 14 
 15 #include <linux/kernel.h>
 16 #include <linux/delay.h>
 17 #include <linux/types.h>
 18 #include <linux/string.h>
 19 #include <linux/gfp.h>
 20 #include <linux/blkdev.h>
 21 #include <linux/proc_fs.h>
 22 #include <linux/stat.h>
 23 #include <linux/init.h>
 24 #include <linux/spinlock.h>
 25 #include <linux/interrupt.h>
 26 #include <linux/module.h>
 27 #include <linux/jiffies.h>
 28 #include <linux/dma-mapping.h>
 29 #include <linux/of.h>
 30 #include <linux/of_device.h>
 31 #include <linux/firmware.h>
 32 
 33 #include <asm/byteorder.h>
 34 
 35 #include "qlogicpti.h"
 36 
 37 #include <asm/dma.h>
 38 #include <asm/ptrace.h>
 39 #include <asm/pgtable.h>
 40 #include <asm/oplib.h>
 41 #include <asm/io.h>
 42 #include <asm/irq.h>
 43 
 44 #include <scsi/scsi.h>
 45 #include <scsi/scsi_cmnd.h>
 46 #include <scsi/scsi_device.h>
 47 #include <scsi/scsi_eh.h>
 48 #include <scsi/scsi_tcq.h>
 49 #include <scsi/scsi_host.h>
 50 
 51 #define MAX_TARGETS     16
 52 #define MAX_LUNS        8       /* 32 for 1.31 F/W */
 53 
 54 #define DEFAULT_LOOP_COUNT      10000
 55 
 56 static struct qlogicpti *qptichain = NULL;
 57 static DEFINE_SPINLOCK(qptichain_lock);
 58 
 59 #define PACKB(a, b)                     (((a)<<4)|(b))
 60 
 61 static const u_char mbox_param[] = {
 62         PACKB(1, 1),    /* MBOX_NO_OP */
 63         PACKB(5, 5),    /* MBOX_LOAD_RAM */
 64         PACKB(2, 0),    /* MBOX_EXEC_FIRMWARE */
 65         PACKB(5, 5),    /* MBOX_DUMP_RAM */
 66         PACKB(3, 3),    /* MBOX_WRITE_RAM_WORD */
 67         PACKB(2, 3),    /* MBOX_READ_RAM_WORD */
 68         PACKB(6, 6),    /* MBOX_MAILBOX_REG_TEST */
 69         PACKB(2, 3),    /* MBOX_VERIFY_CHECKSUM */
 70         PACKB(1, 3),    /* MBOX_ABOUT_FIRMWARE */
 71         PACKB(0, 0),    /* 0x0009 */
 72         PACKB(0, 0),    /* 0x000a */
 73         PACKB(0, 0),    /* 0x000b */
 74         PACKB(0, 0),    /* 0x000c */
 75         PACKB(0, 0),    /* 0x000d */
 76         PACKB(1, 2),    /* MBOX_CHECK_FIRMWARE */
 77         PACKB(0, 0),    /* 0x000f */
 78         PACKB(5, 5),    /* MBOX_INIT_REQ_QUEUE */
 79         PACKB(6, 6),    /* MBOX_INIT_RES_QUEUE */
 80         PACKB(4, 4),    /* MBOX_EXECUTE_IOCB */
 81         PACKB(2, 2),    /* MBOX_WAKE_UP */
 82         PACKB(1, 6),    /* MBOX_STOP_FIRMWARE */
 83         PACKB(4, 4),    /* MBOX_ABORT */
 84         PACKB(2, 2),    /* MBOX_ABORT_DEVICE */
 85         PACKB(3, 3),    /* MBOX_ABORT_TARGET */
 86         PACKB(2, 2),    /* MBOX_BUS_RESET */
 87         PACKB(2, 3),    /* MBOX_STOP_QUEUE */
 88         PACKB(2, 3),    /* MBOX_START_QUEUE */
 89         PACKB(2, 3),    /* MBOX_SINGLE_STEP_QUEUE */
 90         PACKB(2, 3),    /* MBOX_ABORT_QUEUE */
 91         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_STATUS */
 92         PACKB(0, 0),    /* 0x001e */
 93         PACKB(1, 3),    /* MBOX_GET_FIRMWARE_STATUS */
 94         PACKB(1, 2),    /* MBOX_GET_INIT_SCSI_ID */
 95         PACKB(1, 2),    /* MBOX_GET_SELECT_TIMEOUT */
 96         PACKB(1, 3),    /* MBOX_GET_RETRY_COUNT */
 97         PACKB(1, 2),    /* MBOX_GET_TAG_AGE_LIMIT */
 98         PACKB(1, 2),    /* MBOX_GET_CLOCK_RATE */
 99         PACKB(1, 2),    /* MBOX_GET_ACT_NEG_STATE */
100         PACKB(1, 2),    /* MBOX_GET_ASYNC_DATA_SETUP_TIME */
101         PACKB(1, 3),    /* MBOX_GET_SBUS_PARAMS */
102         PACKB(2, 4),    /* MBOX_GET_TARGET_PARAMS */
103         PACKB(2, 4),    /* MBOX_GET_DEV_QUEUE_PARAMS */
104         PACKB(0, 0),    /* 0x002a */
105         PACKB(0, 0),    /* 0x002b */
106         PACKB(0, 0),    /* 0x002c */
107         PACKB(0, 0),    /* 0x002d */
108         PACKB(0, 0),    /* 0x002e */
109         PACKB(0, 0),    /* 0x002f */
110         PACKB(2, 2),    /* MBOX_SET_INIT_SCSI_ID */
111         PACKB(2, 2),    /* MBOX_SET_SELECT_TIMEOUT */
112         PACKB(3, 3),    /* MBOX_SET_RETRY_COUNT */
113         PACKB(2, 2),    /* MBOX_SET_TAG_AGE_LIMIT */
114         PACKB(2, 2),    /* MBOX_SET_CLOCK_RATE */
115         PACKB(2, 2),    /* MBOX_SET_ACTIVE_NEG_STATE */
116         PACKB(2, 2),    /* MBOX_SET_ASYNC_DATA_SETUP_TIME */
117         PACKB(3, 3),    /* MBOX_SET_SBUS_CONTROL_PARAMS */
118         PACKB(4, 4),    /* MBOX_SET_TARGET_PARAMS */
119         PACKB(4, 4),    /* MBOX_SET_DEV_QUEUE_PARAMS */
120         PACKB(0, 0),    /* 0x003a */
121         PACKB(0, 0),    /* 0x003b */
122         PACKB(0, 0),    /* 0x003c */
123         PACKB(0, 0),    /* 0x003d */
124         PACKB(0, 0),    /* 0x003e */
125         PACKB(0, 0),    /* 0x003f */
126         PACKB(0, 0),    /* 0x0040 */
127         PACKB(0, 0),    /* 0x0041 */
128         PACKB(0, 0)     /* 0x0042 */
129 };
130 
131 #define MAX_MBOX_COMMAND        ARRAY_SIZE(mbox_param)
132 
133 /* queue length's _must_ be power of two: */
134 #define QUEUE_DEPTH(in, out, ql)        ((in - out) & (ql))
135 #define REQ_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out,                 \
136                                                     QLOGICPTI_REQ_QUEUE_LEN)
137 #define RES_QUEUE_DEPTH(in, out)        QUEUE_DEPTH(in, out, RES_QUEUE_LEN)
138 
139 static inline void qlogicpti_enable_irqs(struct qlogicpti *qpti)
140 {
141         sbus_writew(SBUS_CTRL_ERIRQ | SBUS_CTRL_GENAB,
142                     qpti->qregs + SBUS_CTRL);
143 }
144 
145 static inline void qlogicpti_disable_irqs(struct qlogicpti *qpti)
146 {
147         sbus_writew(0, qpti->qregs + SBUS_CTRL);
148 }
149 
150 static inline void set_sbus_cfg1(struct qlogicpti *qpti)
151 {
152         u16 val;
153         u8 bursts = qpti->bursts;
154 
155 #if 0   /* It appears that at least PTI cards do not support
156          * 64-byte bursts and that setting the B64 bit actually
157          * is a nop and the chip ends up using the smallest burst
158          * size. -DaveM
159          */
160         if (sbus_can_burst64() && (bursts & DMA_BURST64)) {
161                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B64);
162         } else
163 #endif
164         if (bursts & DMA_BURST32) {
165                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B32);
166         } else if (bursts & DMA_BURST16) {
167                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B16);
168         } else if (bursts & DMA_BURST8) {
169                 val = (SBUS_CFG1_BENAB | SBUS_CFG1_B8);
170         } else {
171                 val = 0; /* No sbus bursts for you... */
172         }
173         sbus_writew(val, qpti->qregs + SBUS_CFG1);
174 }
175 
176 static int qlogicpti_mbox_command(struct qlogicpti *qpti, u_short param[], int force)
177 {
178         int loop_count;
179         u16 tmp;
180 
181         if (mbox_param[param[0]] == 0)
182                 return 1;
183 
184         /* Set SBUS semaphore. */
185         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
186         tmp |= SBUS_SEMAPHORE_LCK;
187         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
188 
189         /* Wait for host IRQ bit to clear. */
190         loop_count = DEFAULT_LOOP_COUNT;
191         while (--loop_count && (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_HIRQ)) {
192                 barrier();
193                 cpu_relax();
194         }
195         if (!loop_count)
196                 printk(KERN_EMERG "qlogicpti%d: mbox_command loop timeout #1\n",
197                        qpti->qpti_id);
198 
199         /* Write mailbox command registers. */
200         switch (mbox_param[param[0]] >> 4) {
201         case 6: sbus_writew(param[5], qpti->qregs + MBOX5);
202         case 5: sbus_writew(param[4], qpti->qregs + MBOX4);
203         case 4: sbus_writew(param[3], qpti->qregs + MBOX3);
204         case 3: sbus_writew(param[2], qpti->qregs + MBOX2);
205         case 2: sbus_writew(param[1], qpti->qregs + MBOX1);
206         case 1: sbus_writew(param[0], qpti->qregs + MBOX0);
207         }
208 
209         /* Clear RISC interrupt. */
210         tmp = sbus_readw(qpti->qregs + HCCTRL);
211         tmp |= HCCTRL_CRIRQ;
212         sbus_writew(tmp, qpti->qregs + HCCTRL);
213 
214         /* Clear SBUS semaphore. */
215         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
216 
217         /* Set HOST interrupt. */
218         tmp = sbus_readw(qpti->qregs + HCCTRL);
219         tmp |= HCCTRL_SHIRQ;
220         sbus_writew(tmp, qpti->qregs + HCCTRL);
221 
222         /* Wait for HOST interrupt clears. */
223         loop_count = DEFAULT_LOOP_COUNT;
224         while (--loop_count &&
225                (sbus_readw(qpti->qregs + HCCTRL) & HCCTRL_CRIRQ))
226                 udelay(20);
227         if (!loop_count)
228                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #2\n",
229                        qpti->qpti_id, param[0]);
230 
231         /* Wait for SBUS semaphore to get set. */
232         loop_count = DEFAULT_LOOP_COUNT;
233         while (--loop_count &&
234                !(sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK)) {
235                 udelay(20);
236 
237                 /* Workaround for some buggy chips. */
238                 if (sbus_readw(qpti->qregs + MBOX0) & 0x4000)
239                         break;
240         }
241         if (!loop_count)
242                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #3\n",
243                        qpti->qpti_id, param[0]);
244 
245         /* Wait for MBOX busy condition to go away. */
246         loop_count = DEFAULT_LOOP_COUNT;
247         while (--loop_count && (sbus_readw(qpti->qregs + MBOX0) == 0x04))
248                 udelay(20);
249         if (!loop_count)
250                 printk(KERN_EMERG "qlogicpti%d: mbox_command[%04x] loop timeout #4\n",
251                        qpti->qpti_id, param[0]);
252 
253         /* Read back output parameters. */
254         switch (mbox_param[param[0]] & 0xf) {
255         case 6: param[5] = sbus_readw(qpti->qregs + MBOX5);
256         case 5: param[4] = sbus_readw(qpti->qregs + MBOX4);
257         case 4: param[3] = sbus_readw(qpti->qregs + MBOX3);
258         case 3: param[2] = sbus_readw(qpti->qregs + MBOX2);
259         case 2: param[1] = sbus_readw(qpti->qregs + MBOX1);
260         case 1: param[0] = sbus_readw(qpti->qregs + MBOX0);
261         }
262 
263         /* Clear RISC interrupt. */
264         tmp = sbus_readw(qpti->qregs + HCCTRL);
265         tmp |= HCCTRL_CRIRQ;
266         sbus_writew(tmp, qpti->qregs + HCCTRL);
267 
268         /* Release SBUS semaphore. */
269         tmp = sbus_readw(qpti->qregs + SBUS_SEMAPHORE);
270         tmp &= ~(SBUS_SEMAPHORE_LCK);
271         sbus_writew(tmp, qpti->qregs + SBUS_SEMAPHORE);
272 
273         /* We're done. */
274         return 0;
275 }
276 
277 static inline void qlogicpti_set_hostdev_defaults(struct qlogicpti *qpti)
278 {
279         int i;
280 
281         qpti->host_param.initiator_scsi_id = qpti->scsi_id;
282         qpti->host_param.bus_reset_delay = 3;
283         qpti->host_param.retry_count = 0;
284         qpti->host_param.retry_delay = 5;
285         qpti->host_param.async_data_setup_time = 3;
286         qpti->host_param.req_ack_active_negation = 1;
287         qpti->host_param.data_line_active_negation = 1;
288         qpti->host_param.data_dma_burst_enable = 1;
289         qpti->host_param.command_dma_burst_enable = 1;
290         qpti->host_param.tag_aging = 8;
291         qpti->host_param.selection_timeout = 250;
292         qpti->host_param.max_queue_depth = 256;
293 
294         for(i = 0; i < MAX_TARGETS; i++) {
295                 /*
296                  * disconnect, parity, arq, reneg on reset, and, oddly enough
297                  * tags...the midlayer's notion of tagged support has to match
298                  * our device settings, and since we base whether we enable a
299                  * tag on a  per-cmnd basis upon what the midlayer sez, we
300                  * actually enable the capability here.
301                  */
302                 qpti->dev_param[i].device_flags = 0xcd;
303                 qpti->dev_param[i].execution_throttle = 16;
304                 if (qpti->ultra) {
305                         qpti->dev_param[i].synchronous_period = 12;
306                         qpti->dev_param[i].synchronous_offset = 8;
307                 } else {
308                         qpti->dev_param[i].synchronous_period = 25;
309                         qpti->dev_param[i].synchronous_offset = 12;
310                 }
311                 qpti->dev_param[i].device_enable = 1;
312         }
313 }
314 
315 static int qlogicpti_reset_hardware(struct Scsi_Host *host)
316 {
317         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
318         u_short param[6];
319         unsigned short risc_code_addr;
320         int loop_count, i;
321         unsigned long flags;
322 
323         risc_code_addr = 0x1000;        /* all load addresses are at 0x1000 */
324 
325         spin_lock_irqsave(host->host_lock, flags);
326 
327         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
328 
329         /* Only reset the scsi bus if it is not free. */
330         if (sbus_readw(qpti->qregs + CPU_PCTRL) & CPU_PCTRL_BSY) {
331                 sbus_writew(CPU_ORIDE_RMOD, qpti->qregs + CPU_ORIDE);
332                 sbus_writew(CPU_CMD_BRESET, qpti->qregs + CPU_CMD);
333                 udelay(400);
334         }
335 
336         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
337         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
338         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
339 
340         loop_count = DEFAULT_LOOP_COUNT;
341         while (--loop_count && ((sbus_readw(qpti->qregs + MBOX0) & 0xff) == 0x04))
342                 udelay(20);
343         if (!loop_count)
344                 printk(KERN_EMERG "qlogicpti%d: reset_hardware loop timeout\n",
345                        qpti->qpti_id);
346 
347         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
348         set_sbus_cfg1(qpti);
349         qlogicpti_enable_irqs(qpti);
350 
351         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
352                 qpti->ultra = 1;
353                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
354                             qpti->qregs + RISC_MTREG);
355         } else {
356                 qpti->ultra = 0;
357                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
358                             qpti->qregs + RISC_MTREG);
359         }
360 
361         /* reset adapter and per-device default values. */
362         /* do it after finding out whether we're ultra mode capable */
363         qlogicpti_set_hostdev_defaults(qpti);
364 
365         /* Release the RISC processor. */
366         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
367 
368         /* Get RISC to start executing the firmware code. */
369         param[0] = MBOX_EXEC_FIRMWARE;
370         param[1] = risc_code_addr;
371         if (qlogicpti_mbox_command(qpti, param, 1)) {
372                 printk(KERN_EMERG "qlogicpti%d: Cannot execute ISP firmware.\n",
373                        qpti->qpti_id);
374                 spin_unlock_irqrestore(host->host_lock, flags);
375                 return 1;
376         }
377 
378         /* Set initiator scsi ID. */
379         param[0] = MBOX_SET_INIT_SCSI_ID;
380         param[1] = qpti->host_param.initiator_scsi_id;
381         if (qlogicpti_mbox_command(qpti, param, 1) ||
382            (param[0] != MBOX_COMMAND_COMPLETE)) {
383                 printk(KERN_EMERG "qlogicpti%d: Cannot set initiator SCSI ID.\n",
384                        qpti->qpti_id);
385                 spin_unlock_irqrestore(host->host_lock, flags);
386                 return 1;
387         }
388 
389         /* Initialize state of the queues, both hw and sw. */
390         qpti->req_in_ptr = qpti->res_out_ptr = 0;
391 
392         param[0] = MBOX_INIT_RES_QUEUE;
393         param[1] = RES_QUEUE_LEN + 1;
394         param[2] = (u_short) (qpti->res_dvma >> 16);
395         param[3] = (u_short) (qpti->res_dvma & 0xffff);
396         param[4] = param[5] = 0;
397         if (qlogicpti_mbox_command(qpti, param, 1)) {
398                 printk(KERN_EMERG "qlogicpti%d: Cannot init response queue.\n",
399                        qpti->qpti_id);
400                 spin_unlock_irqrestore(host->host_lock, flags);
401                 return 1;
402         }
403 
404         param[0] = MBOX_INIT_REQ_QUEUE;
405         param[1] = QLOGICPTI_REQ_QUEUE_LEN + 1;
406         param[2] = (u_short) (qpti->req_dvma >> 16);
407         param[3] = (u_short) (qpti->req_dvma & 0xffff);
408         param[4] = param[5] = 0;
409         if (qlogicpti_mbox_command(qpti, param, 1)) {
410                 printk(KERN_EMERG "qlogicpti%d: Cannot init request queue.\n",
411                        qpti->qpti_id);
412                 spin_unlock_irqrestore(host->host_lock, flags);
413                 return 1;
414         }
415 
416         param[0] = MBOX_SET_RETRY_COUNT;
417         param[1] = qpti->host_param.retry_count;
418         param[2] = qpti->host_param.retry_delay;
419         qlogicpti_mbox_command(qpti, param, 0);
420 
421         param[0] = MBOX_SET_TAG_AGE_LIMIT;
422         param[1] = qpti->host_param.tag_aging;
423         qlogicpti_mbox_command(qpti, param, 0);
424 
425         for (i = 0; i < MAX_TARGETS; i++) {
426                 param[0] = MBOX_GET_DEV_QUEUE_PARAMS;
427                 param[1] = (i << 8);
428                 qlogicpti_mbox_command(qpti, param, 0);
429         }
430 
431         param[0] = MBOX_GET_FIRMWARE_STATUS;
432         qlogicpti_mbox_command(qpti, param, 0);
433 
434         param[0] = MBOX_SET_SELECT_TIMEOUT;
435         param[1] = qpti->host_param.selection_timeout;
436         qlogicpti_mbox_command(qpti, param, 0);
437 
438         for (i = 0; i < MAX_TARGETS; i++) {
439                 param[0] = MBOX_SET_TARGET_PARAMS;
440                 param[1] = (i << 8);
441                 param[2] = (qpti->dev_param[i].device_flags << 8);
442                 /*
443                  * Since we're now loading 1.31 f/w, force narrow/async.
444                  */
445                 param[2] |= 0xc0;
446                 param[3] = 0;   /* no offset, we do not have sync mode yet */
447                 qlogicpti_mbox_command(qpti, param, 0);
448         }
449 
450         /*
451          * Always (sigh) do an initial bus reset (kicks f/w).
452          */
453         param[0] = MBOX_BUS_RESET;
454         param[1] = qpti->host_param.bus_reset_delay;
455         qlogicpti_mbox_command(qpti, param, 0);
456         qpti->send_marker = 1;
457 
458         spin_unlock_irqrestore(host->host_lock, flags);
459         return 0;
460 }
461 
462 #define PTI_RESET_LIMIT 400
463 
464 static int qlogicpti_load_firmware(struct qlogicpti *qpti)
465 {
466         const struct firmware *fw;
467         const char fwname[] = "qlogic/isp1000.bin";
468         const __le16 *fw_data;
469         struct Scsi_Host *host = qpti->qhost;
470         unsigned short csum = 0;
471         unsigned short param[6];
472         unsigned short risc_code_addr, risc_code_length;
473         int err;
474         unsigned long flags;
475         int i, timeout;
476 
477         err = request_firmware(&fw, fwname, &qpti->op->dev);
478         if (err) {
479                 printk(KERN_ERR "Failed to load image \"%s\" err %d\n",
480                        fwname, err);
481                 return err;
482         }
483         if (fw->size % 2) {
484                 printk(KERN_ERR "Bogus length %zu in image \"%s\"\n",
485                        fw->size, fwname);
486                 err = -EINVAL;
487                 goto outfirm;
488         }
489         fw_data = (const __le16 *)&fw->data[0];
490         risc_code_addr = 0x1000;        /* all f/w modules load at 0x1000 */
491         risc_code_length = fw->size / 2;
492 
493         spin_lock_irqsave(host->host_lock, flags);
494 
495         /* Verify the checksum twice, one before loading it, and once
496          * afterwards via the mailbox commands.
497          */
498         for (i = 0; i < risc_code_length; i++)
499                 csum += __le16_to_cpu(fw_data[i]);
500         if (csum) {
501                 printk(KERN_EMERG "qlogicpti%d: Aieee, firmware checksum failed!",
502                        qpti->qpti_id);
503                 err = 1;
504                 goto out;
505         }               
506         sbus_writew(SBUS_CTRL_RESET, qpti->qregs + SBUS_CTRL);
507         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + CMD_DMA_CTRL);
508         sbus_writew((DMA_CTRL_CCLEAR | DMA_CTRL_CIRQ), qpti->qregs + DATA_DMA_CTRL);
509         timeout = PTI_RESET_LIMIT;
510         while (--timeout && (sbus_readw(qpti->qregs + SBUS_CTRL) & SBUS_CTRL_RESET))
511                 udelay(20);
512         if (!timeout) {
513                 printk(KERN_EMERG "qlogicpti%d: Cannot reset the ISP.", qpti->qpti_id);
514                 err = 1;
515                 goto out;
516         }
517 
518         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
519         mdelay(1);
520 
521         sbus_writew((SBUS_CTRL_GENAB | SBUS_CTRL_ERIRQ), qpti->qregs + SBUS_CTRL);
522         set_sbus_cfg1(qpti);
523         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
524 
525         if (sbus_readw(qpti->qregs + RISC_PSR) & RISC_PSR_ULTRA) {
526                 qpti->ultra = 1;
527                 sbus_writew((RISC_MTREG_P0ULTRA | RISC_MTREG_P1ULTRA),
528                             qpti->qregs + RISC_MTREG);
529         } else {
530                 qpti->ultra = 0;
531                 sbus_writew((RISC_MTREG_P0DFLT | RISC_MTREG_P1DFLT),
532                             qpti->qregs + RISC_MTREG);
533         }
534 
535         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
536 
537         /* Pin lines are only stable while RISC is paused. */
538         sbus_writew(HCCTRL_PAUSE, qpti->qregs + HCCTRL);
539         if (sbus_readw(qpti->qregs + CPU_PDIFF) & CPU_PDIFF_MODE)
540                 qpti->differential = 1;
541         else
542                 qpti->differential = 0;
543         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
544 
545         /* This shouldn't be necessary- we've reset things so we should be
546            running from the ROM now.. */
547 
548         param[0] = MBOX_STOP_FIRMWARE;
549         param[1] = param[2] = param[3] = param[4] = param[5] = 0;
550         if (qlogicpti_mbox_command(qpti, param, 1)) {
551                 printk(KERN_EMERG "qlogicpti%d: Cannot stop firmware for reload.\n",
552                        qpti->qpti_id);
553                 err = 1;
554                 goto out;
555         }               
556 
557         /* Load it up.. */
558         for (i = 0; i < risc_code_length; i++) {
559                 param[0] = MBOX_WRITE_RAM_WORD;
560                 param[1] = risc_code_addr + i;
561                 param[2] = __le16_to_cpu(fw_data[i]);
562                 if (qlogicpti_mbox_command(qpti, param, 1) ||
563                     param[0] != MBOX_COMMAND_COMPLETE) {
564                         printk("qlogicpti%d: Firmware dload failed, I'm bolixed!\n",
565                                qpti->qpti_id);
566                         err = 1;
567                         goto out;
568                 }
569         }
570 
571         /* Reset the ISP again. */
572         sbus_writew(HCCTRL_RESET, qpti->qregs + HCCTRL);
573         mdelay(1);
574 
575         qlogicpti_enable_irqs(qpti);
576         sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
577         sbus_writew(HCCTRL_REL, qpti->qregs + HCCTRL);
578 
579         /* Ask ISP to verify the checksum of the new code. */
580         param[0] = MBOX_VERIFY_CHECKSUM;
581         param[1] = risc_code_addr;
582         if (qlogicpti_mbox_command(qpti, param, 1) ||
583             (param[0] != MBOX_COMMAND_COMPLETE)) {
584                 printk(KERN_EMERG "qlogicpti%d: New firmware csum failure!\n",
585                        qpti->qpti_id);
586                 err = 1;
587                 goto out;
588         }
589 
590         /* Start using newly downloaded firmware. */
591         param[0] = MBOX_EXEC_FIRMWARE;
592         param[1] = risc_code_addr;
593         qlogicpti_mbox_command(qpti, param, 1);
594 
595         param[0] = MBOX_ABOUT_FIRMWARE;
596         if (qlogicpti_mbox_command(qpti, param, 1) ||
597             (param[0] != MBOX_COMMAND_COMPLETE)) {
598                 printk(KERN_EMERG "qlogicpti%d: AboutFirmware cmd fails.\n",
599                        qpti->qpti_id);
600                 err = 1;
601                 goto out;
602         }
603 
604         /* Snag the major and minor revisions from the result. */
605         qpti->fware_majrev = param[1];
606         qpti->fware_minrev = param[2];
607         qpti->fware_micrev = param[3];
608 
609         /* Set the clock rate */
610         param[0] = MBOX_SET_CLOCK_RATE;
611         param[1] = qpti->clock;
612         if (qlogicpti_mbox_command(qpti, param, 1) ||
613             (param[0] != MBOX_COMMAND_COMPLETE)) {
614                 printk(KERN_EMERG "qlogicpti%d: could not set clock rate.\n",
615                        qpti->qpti_id);
616                 err = 1;
617                 goto out;
618         }
619 
620         if (qpti->is_pti != 0) {
621                 /* Load scsi initiator ID and interrupt level into sbus static ram. */
622                 param[0] = MBOX_WRITE_RAM_WORD;
623                 param[1] = 0xff80;
624                 param[2] = (unsigned short) qpti->scsi_id;
625                 qlogicpti_mbox_command(qpti, param, 1);
626 
627                 param[0] = MBOX_WRITE_RAM_WORD;
628                 param[1] = 0xff00;
629                 param[2] = (unsigned short) 3;
630                 qlogicpti_mbox_command(qpti, param, 1);
631         }
632 
633 out:
634         spin_unlock_irqrestore(host->host_lock, flags);
635 outfirm:
636         release_firmware(fw);
637         return err;
638 }
639 
640 static int qlogicpti_verify_tmon(struct qlogicpti *qpti)
641 {
642         int curstat = sbus_readb(qpti->sreg);
643 
644         curstat &= 0xf0;
645         if (!(curstat & SREG_FUSE) && (qpti->swsreg & SREG_FUSE))
646                 printk("qlogicpti%d: Fuse returned to normal state.\n", qpti->qpti_id);
647         if (!(curstat & SREG_TPOWER) && (qpti->swsreg & SREG_TPOWER))
648                 printk("qlogicpti%d: termpwr back to normal state.\n", qpti->qpti_id);
649         if (curstat != qpti->swsreg) {
650                 int error = 0;
651                 if (curstat & SREG_FUSE) {
652                         error++;
653                         printk("qlogicpti%d: Fuse is open!\n", qpti->qpti_id);
654                 }
655                 if (curstat & SREG_TPOWER) {
656                         error++;
657                         printk("qlogicpti%d: termpwr failure\n", qpti->qpti_id);
658                 }
659                 if (qpti->differential &&
660                     (curstat & SREG_DSENSE) != SREG_DSENSE) {
661                         error++;
662                         printk("qlogicpti%d: You have a single ended device on a "
663                                "differential bus!  Please fix!\n", qpti->qpti_id);
664                 }
665                 qpti->swsreg = curstat;
666                 return error;
667         }
668         return 0;
669 }
670 
671 static irqreturn_t qpti_intr(int irq, void *dev_id);
672 
673 static void qpti_chain_add(struct qlogicpti *qpti)
674 {
675         spin_lock_irq(&qptichain_lock);
676         if (qptichain != NULL) {
677                 struct qlogicpti *qlink = qptichain;
678 
679                 while(qlink->next)
680                         qlink = qlink->next;
681                 qlink->next = qpti;
682         } else {
683                 qptichain = qpti;
684         }
685         qpti->next = NULL;
686         spin_unlock_irq(&qptichain_lock);
687 }
688 
689 static void qpti_chain_del(struct qlogicpti *qpti)
690 {
691         spin_lock_irq(&qptichain_lock);
692         if (qptichain == qpti) {
693                 qptichain = qpti->next;
694         } else {
695                 struct qlogicpti *qlink = qptichain;
696                 while(qlink->next != qpti)
697                         qlink = qlink->next;
698                 qlink->next = qpti->next;
699         }
700         qpti->next = NULL;
701         spin_unlock_irq(&qptichain_lock);
702 }
703 
704 static int qpti_map_regs(struct qlogicpti *qpti)
705 {
706         struct platform_device *op = qpti->op;
707 
708         qpti->qregs = of_ioremap(&op->resource[0], 0,
709                                  resource_size(&op->resource[0]),
710                                  "PTI Qlogic/ISP");
711         if (!qpti->qregs) {
712                 printk("PTI: Qlogic/ISP registers are unmappable\n");
713                 return -1;
714         }
715         if (qpti->is_pti) {
716                 qpti->sreg = of_ioremap(&op->resource[0], (16 * 4096),
717                                         sizeof(unsigned char),
718                                         "PTI Qlogic/ISP statreg");
719                 if (!qpti->sreg) {
720                         printk("PTI: Qlogic/ISP status register is unmappable\n");
721                         return -1;
722                 }
723         }
724         return 0;
725 }
726 
727 static int qpti_register_irq(struct qlogicpti *qpti)
728 {
729         struct platform_device *op = qpti->op;
730 
731         qpti->qhost->irq = qpti->irq = op->archdata.irqs[0];
732 
733         /* We used to try various overly-clever things to
734          * reduce the interrupt processing overhead on
735          * sun4c/sun4m when multiple PTI's shared the
736          * same IRQ.  It was too complex and messy to
737          * sanely maintain.
738          */
739         if (request_irq(qpti->irq, qpti_intr,
740                         IRQF_SHARED, "QlogicPTI", qpti))
741                 goto fail;
742 
743         printk("qlogicpti%d: IRQ %d ", qpti->qpti_id, qpti->irq);
744 
745         return 0;
746 
747 fail:
748         printk("qlogicpti%d: Cannot acquire irq line\n", qpti->qpti_id);
749         return -1;
750 }
751 
752 static void qpti_get_scsi_id(struct qlogicpti *qpti)
753 {
754         struct platform_device *op = qpti->op;
755         struct device_node *dp;
756 
757         dp = op->dev.of_node;
758 
759         qpti->scsi_id = of_getintprop_default(dp, "initiator-id", -1);
760         if (qpti->scsi_id == -1)
761                 qpti->scsi_id = of_getintprop_default(dp, "scsi-initiator-id",
762                                                       -1);
763         if (qpti->scsi_id == -1)
764                 qpti->scsi_id =
765                         of_getintprop_default(dp->parent,
766                                               "scsi-initiator-id", 7);
767         qpti->qhost->this_id = qpti->scsi_id;
768         qpti->qhost->max_sectors = 64;
769 
770         printk("SCSI ID %d ", qpti->scsi_id);
771 }
772 
773 static void qpti_get_bursts(struct qlogicpti *qpti)
774 {
775         struct platform_device *op = qpti->op;
776         u8 bursts, bmask;
777 
778         bursts = of_getintprop_default(op->dev.of_node, "burst-sizes", 0xff);
779         bmask = of_getintprop_default(op->dev.of_node->parent, "burst-sizes", 0xff);
780         if (bmask != 0xff)
781                 bursts &= bmask;
782         if (bursts == 0xff ||
783             (bursts & DMA_BURST16) == 0 ||
784             (bursts & DMA_BURST32) == 0)
785                 bursts = (DMA_BURST32 - 1);
786 
787         qpti->bursts = bursts;
788 }
789 
790 static void qpti_get_clock(struct qlogicpti *qpti)
791 {
792         unsigned int cfreq;
793 
794         /* Check for what the clock input to this card is.
795          * Default to 40Mhz.
796          */
797         cfreq = prom_getintdefault(qpti->prom_node,"clock-frequency",40000000);
798         qpti->clock = (cfreq + 500000)/1000000;
799         if (qpti->clock == 0) /* bullshit */
800                 qpti->clock = 40;
801 }
802 
803 /* The request and response queues must each be aligned
804  * on a page boundary.
805  */
806 static int qpti_map_queues(struct qlogicpti *qpti)
807 {
808         struct platform_device *op = qpti->op;
809 
810 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
811         qpti->res_cpu = dma_alloc_coherent(&op->dev,
812                                            QSIZE(RES_QUEUE_LEN),
813                                            &qpti->res_dvma, GFP_ATOMIC);
814         if (qpti->res_cpu == NULL ||
815             qpti->res_dvma == 0) {
816                 printk("QPTI: Cannot map response queue.\n");
817                 return -1;
818         }
819 
820         qpti->req_cpu = dma_alloc_coherent(&op->dev,
821                                            QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
822                                            &qpti->req_dvma, GFP_ATOMIC);
823         if (qpti->req_cpu == NULL ||
824             qpti->req_dvma == 0) {
825                 dma_free_coherent(&op->dev, QSIZE(RES_QUEUE_LEN),
826                                   qpti->res_cpu, qpti->res_dvma);
827                 printk("QPTI: Cannot map request queue.\n");
828                 return -1;
829         }
830         memset(qpti->res_cpu, 0, QSIZE(RES_QUEUE_LEN));
831         memset(qpti->req_cpu, 0, QSIZE(QLOGICPTI_REQ_QUEUE_LEN));
832         return 0;
833 }
834 
835 const char *qlogicpti_info(struct Scsi_Host *host)
836 {
837         static char buf[80];
838         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
839 
840         sprintf(buf, "PTI Qlogic,ISP SBUS SCSI irq %d regs at %p",
841                 qpti->qhost->irq, qpti->qregs);
842         return buf;
843 }
844 
845 /* I am a certified frobtronicist. */
846 static inline void marker_frob(struct Command_Entry *cmd)
847 {
848         struct Marker_Entry *marker = (struct Marker_Entry *) cmd;
849 
850         memset(marker, 0, sizeof(struct Marker_Entry));
851         marker->hdr.entry_cnt = 1;
852         marker->hdr.entry_type = ENTRY_MARKER;
853         marker->modifier = SYNC_ALL;
854         marker->rsvd = 0;
855 }
856 
857 static inline void cmd_frob(struct Command_Entry *cmd, struct scsi_cmnd *Cmnd,
858                             struct qlogicpti *qpti)
859 {
860         memset(cmd, 0, sizeof(struct Command_Entry));
861         cmd->hdr.entry_cnt = 1;
862         cmd->hdr.entry_type = ENTRY_COMMAND;
863         cmd->target_id = Cmnd->device->id;
864         cmd->target_lun = Cmnd->device->lun;
865         cmd->cdb_length = Cmnd->cmd_len;
866         cmd->control_flags = 0;
867         if (Cmnd->device->tagged_supported) {
868                 if (qpti->cmd_count[Cmnd->device->id] == 0)
869                         qpti->tag_ages[Cmnd->device->id] = jiffies;
870                 if (time_after(jiffies, qpti->tag_ages[Cmnd->device->id] + (5*HZ))) {
871                         cmd->control_flags = CFLAG_ORDERED_TAG;
872                         qpti->tag_ages[Cmnd->device->id] = jiffies;
873                 } else
874                         cmd->control_flags = CFLAG_SIMPLE_TAG;
875         }
876         if ((Cmnd->cmnd[0] == WRITE_6) ||
877             (Cmnd->cmnd[0] == WRITE_10) ||
878             (Cmnd->cmnd[0] == WRITE_12))
879                 cmd->control_flags |= CFLAG_WRITE;
880         else
881                 cmd->control_flags |= CFLAG_READ;
882         cmd->time_out = Cmnd->request->timeout/HZ;
883         memcpy(cmd->cdb, Cmnd->cmnd, Cmnd->cmd_len);
884 }
885 
886 /* Do it to it baby. */
887 static inline int load_cmd(struct scsi_cmnd *Cmnd, struct Command_Entry *cmd,
888                            struct qlogicpti *qpti, u_int in_ptr, u_int out_ptr)
889 {
890         struct dataseg *ds;
891         struct scatterlist *sg, *s;
892         int i, n;
893 
894         if (scsi_bufflen(Cmnd)) {
895                 int sg_count;
896 
897                 sg = scsi_sglist(Cmnd);
898                 sg_count = dma_map_sg(&qpti->op->dev, sg,
899                                       scsi_sg_count(Cmnd),
900                                       Cmnd->sc_data_direction);
901 
902                 ds = cmd->dataseg;
903                 cmd->segment_cnt = sg_count;
904 
905                 /* Fill in first four sg entries: */
906                 n = sg_count;
907                 if (n > 4)
908                         n = 4;
909                 for_each_sg(sg, s, n, i) {
910                         ds[i].d_base = sg_dma_address(s);
911                         ds[i].d_count = sg_dma_len(s);
912                 }
913                 sg_count -= 4;
914                 sg = s;
915                 while (sg_count > 0) {
916                         struct Continuation_Entry *cont;
917 
918                         ++cmd->hdr.entry_cnt;
919                         cont = (struct Continuation_Entry *) &qpti->req_cpu[in_ptr];
920                         in_ptr = NEXT_REQ_PTR(in_ptr);
921                         if (in_ptr == out_ptr)
922                                 return -1;
923 
924                         cont->hdr.entry_type = ENTRY_CONTINUATION;
925                         cont->hdr.entry_cnt = 0;
926                         cont->hdr.sys_def_1 = 0;
927                         cont->hdr.flags = 0;
928                         cont->reserved = 0;
929                         ds = cont->dataseg;
930                         n = sg_count;
931                         if (n > 7)
932                                 n = 7;
933                         for_each_sg(sg, s, n, i) {
934                                 ds[i].d_base = sg_dma_address(s);
935                                 ds[i].d_count = sg_dma_len(s);
936                         }
937                         sg_count -= n;
938                         sg = s;
939                 }
940         } else {
941                 cmd->dataseg[0].d_base = 0;
942                 cmd->dataseg[0].d_count = 0;
943                 cmd->segment_cnt = 1; /* Shouldn't this be 0? */
944         }
945 
946         /* Committed, record Scsi_Cmd so we can find it later. */
947         cmd->handle = in_ptr;
948         qpti->cmd_slots[in_ptr] = Cmnd;
949 
950         qpti->cmd_count[Cmnd->device->id]++;
951         sbus_writew(in_ptr, qpti->qregs + MBOX4);
952         qpti->req_in_ptr = in_ptr;
953 
954         return in_ptr;
955 }
956 
957 static inline void update_can_queue(struct Scsi_Host *host, u_int in_ptr, u_int out_ptr)
958 {
959         /* Temporary workaround until bug is found and fixed (one bug has been found
960            already, but fixing it makes things even worse) -jj */
961         int num_free = QLOGICPTI_REQ_QUEUE_LEN - REQ_QUEUE_DEPTH(in_ptr, out_ptr) - 64;
962         host->can_queue = host->host_busy + num_free;
963         host->sg_tablesize = QLOGICPTI_MAX_SG(num_free);
964 }
965 
966 static int qlogicpti_slave_configure(struct scsi_device *sdev)
967 {
968         struct qlogicpti *qpti = shost_priv(sdev->host);
969         int tgt = sdev->id;
970         u_short param[6];
971 
972         /* tags handled in midlayer */
973         /* enable sync mode? */
974         if (sdev->sdtr) {
975                 qpti->dev_param[tgt].device_flags |= 0x10;
976         } else {
977                 qpti->dev_param[tgt].synchronous_offset = 0;
978                 qpti->dev_param[tgt].synchronous_period = 0;
979         }
980         /* are we wide capable? */
981         if (sdev->wdtr)
982                 qpti->dev_param[tgt].device_flags |= 0x20;
983 
984         param[0] = MBOX_SET_TARGET_PARAMS;
985         param[1] = (tgt << 8);
986         param[2] = (qpti->dev_param[tgt].device_flags << 8);
987         if (qpti->dev_param[tgt].device_flags & 0x10) {
988                 param[3] = (qpti->dev_param[tgt].synchronous_offset << 8) |
989                         qpti->dev_param[tgt].synchronous_period;
990         } else {
991                 param[3] = 0;
992         }
993         qlogicpti_mbox_command(qpti, param, 0);
994         return 0;
995 }
996 
997 /*
998  * The middle SCSI layer ensures that queuecommand never gets invoked
999  * concurrently with itself or the interrupt handler (though the
1000  * interrupt handler may call this routine as part of
1001  * request-completion handling).
1002  *
1003  * "This code must fly." -davem
1004  */
1005 static int qlogicpti_queuecommand_lck(struct scsi_cmnd *Cmnd, void (*done)(struct scsi_cmnd *))
1006 {
1007         struct Scsi_Host *host = Cmnd->device->host;
1008         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1009         struct Command_Entry *cmd;
1010         u_int out_ptr;
1011         int in_ptr;
1012 
1013         Cmnd->scsi_done = done;
1014 
1015         in_ptr = qpti->req_in_ptr;
1016         cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1017         out_ptr = sbus_readw(qpti->qregs + MBOX4);
1018         in_ptr = NEXT_REQ_PTR(in_ptr);
1019         if (in_ptr == out_ptr)
1020                 goto toss_command;
1021 
1022         if (qpti->send_marker) {
1023                 marker_frob(cmd);
1024                 qpti->send_marker = 0;
1025                 if (NEXT_REQ_PTR(in_ptr) == out_ptr) {
1026                         sbus_writew(in_ptr, qpti->qregs + MBOX4);
1027                         qpti->req_in_ptr = in_ptr;
1028                         goto toss_command;
1029                 }
1030                 cmd = (struct Command_Entry *) &qpti->req_cpu[in_ptr];
1031                 in_ptr = NEXT_REQ_PTR(in_ptr);
1032         }
1033         cmd_frob(cmd, Cmnd, qpti);
1034         if ((in_ptr = load_cmd(Cmnd, cmd, qpti, in_ptr, out_ptr)) == -1)
1035                 goto toss_command;
1036 
1037         update_can_queue(host, in_ptr, out_ptr);
1038 
1039         return 0;
1040 
1041 toss_command:
1042         printk(KERN_EMERG "qlogicpti%d: request queue overflow\n",
1043                qpti->qpti_id);
1044 
1045         /* Unfortunately, unless you use the new EH code, which
1046          * we don't, the midlayer will ignore the return value,
1047          * which is insane.  We pick up the pieces like this.
1048          */
1049         Cmnd->result = DID_BUS_BUSY;
1050         done(Cmnd);
1051         return 1;
1052 }
1053 
1054 static DEF_SCSI_QCMD(qlogicpti_queuecommand)
1055 
1056 static int qlogicpti_return_status(struct Status_Entry *sts, int id)
1057 {
1058         int host_status = DID_ERROR;
1059 
1060         switch (sts->completion_status) {
1061               case CS_COMPLETE:
1062                 host_status = DID_OK;
1063                 break;
1064               case CS_INCOMPLETE:
1065                 if (!(sts->state_flags & SF_GOT_BUS))
1066                         host_status = DID_NO_CONNECT;
1067                 else if (!(sts->state_flags & SF_GOT_TARGET))
1068                         host_status = DID_BAD_TARGET;
1069                 else if (!(sts->state_flags & SF_SENT_CDB))
1070                         host_status = DID_ERROR;
1071                 else if (!(sts->state_flags & SF_TRANSFERRED_DATA))
1072                         host_status = DID_ERROR;
1073                 else if (!(sts->state_flags & SF_GOT_STATUS))
1074                         host_status = DID_ERROR;
1075                 else if (!(sts->state_flags & SF_GOT_SENSE))
1076                         host_status = DID_ERROR;
1077                 break;
1078               case CS_DMA_ERROR:
1079               case CS_TRANSPORT_ERROR:
1080                 host_status = DID_ERROR;
1081                 break;
1082               case CS_RESET_OCCURRED:
1083               case CS_BUS_RESET:
1084                 host_status = DID_RESET;
1085                 break;
1086               case CS_ABORTED:
1087                 host_status = DID_ABORT;
1088                 break;
1089               case CS_TIMEOUT:
1090                 host_status = DID_TIME_OUT;
1091                 break;
1092               case CS_DATA_OVERRUN:
1093               case CS_COMMAND_OVERRUN:
1094               case CS_STATUS_OVERRUN:
1095               case CS_BAD_MESSAGE:
1096               case CS_NO_MESSAGE_OUT:
1097               case CS_EXT_ID_FAILED:
1098               case CS_IDE_MSG_FAILED:
1099               case CS_ABORT_MSG_FAILED:
1100               case CS_NOP_MSG_FAILED:
1101               case CS_PARITY_ERROR_MSG_FAILED:
1102               case CS_DEVICE_RESET_MSG_FAILED:
1103               case CS_ID_MSG_FAILED:
1104               case CS_UNEXP_BUS_FREE:
1105                 host_status = DID_ERROR;
1106                 break;
1107               case CS_DATA_UNDERRUN:
1108                 host_status = DID_OK;
1109                 break;
1110               default:
1111                 printk(KERN_EMERG "qlogicpti%d: unknown completion status 0x%04x\n",
1112                        id, sts->completion_status);
1113                 host_status = DID_ERROR;
1114                 break;
1115         }
1116 
1117         return (sts->scsi_status & STATUS_MASK) | (host_status << 16);
1118 }
1119 
1120 static struct scsi_cmnd *qlogicpti_intr_handler(struct qlogicpti *qpti)
1121 {
1122         struct scsi_cmnd *Cmnd, *done_queue = NULL;
1123         struct Status_Entry *sts;
1124         u_int in_ptr, out_ptr;
1125 
1126         if (!(sbus_readw(qpti->qregs + SBUS_STAT) & SBUS_STAT_RINT))
1127                 return NULL;
1128                 
1129         in_ptr = sbus_readw(qpti->qregs + MBOX5);
1130         sbus_writew(HCCTRL_CRIRQ, qpti->qregs + HCCTRL);
1131         if (sbus_readw(qpti->qregs + SBUS_SEMAPHORE) & SBUS_SEMAPHORE_LCK) {
1132                 switch (sbus_readw(qpti->qregs + MBOX0)) {
1133                 case ASYNC_SCSI_BUS_RESET:
1134                 case EXECUTION_TIMEOUT_RESET:
1135                         qpti->send_marker = 1;
1136                         break;
1137                 case INVALID_COMMAND:
1138                 case HOST_INTERFACE_ERROR:
1139                 case COMMAND_ERROR:
1140                 case COMMAND_PARAM_ERROR:
1141                         break;
1142                 };
1143                 sbus_writew(0, qpti->qregs + SBUS_SEMAPHORE);
1144         }
1145 
1146         /* This looks like a network driver! */
1147         out_ptr = qpti->res_out_ptr;
1148         while (out_ptr != in_ptr) {
1149                 u_int cmd_slot;
1150 
1151                 sts = (struct Status_Entry *) &qpti->res_cpu[out_ptr];
1152                 out_ptr = NEXT_RES_PTR(out_ptr);
1153 
1154                 /* We store an index in the handle, not the pointer in
1155                  * some form.  This avoids problems due to the fact
1156                  * that the handle provided is only 32-bits. -DaveM
1157                  */
1158                 cmd_slot = sts->handle;
1159                 Cmnd = qpti->cmd_slots[cmd_slot];
1160                 qpti->cmd_slots[cmd_slot] = NULL;
1161 
1162                 if (sts->completion_status == CS_RESET_OCCURRED ||
1163                     sts->completion_status == CS_ABORTED ||
1164                     (sts->status_flags & STF_BUS_RESET))
1165                         qpti->send_marker = 1;
1166 
1167                 if (sts->state_flags & SF_GOT_SENSE)
1168                         memcpy(Cmnd->sense_buffer, sts->req_sense_data,
1169                                SCSI_SENSE_BUFFERSIZE);
1170 
1171                 if (sts->hdr.entry_type == ENTRY_STATUS)
1172                         Cmnd->result =
1173                             qlogicpti_return_status(sts, qpti->qpti_id);
1174                 else
1175                         Cmnd->result = DID_ERROR << 16;
1176 
1177                 if (scsi_bufflen(Cmnd))
1178                         dma_unmap_sg(&qpti->op->dev,
1179                                      scsi_sglist(Cmnd), scsi_sg_count(Cmnd),
1180                                      Cmnd->sc_data_direction);
1181 
1182                 qpti->cmd_count[Cmnd->device->id]--;
1183                 sbus_writew(out_ptr, qpti->qregs + MBOX5);
1184                 Cmnd->host_scribble = (unsigned char *) done_queue;
1185                 done_queue = Cmnd;
1186         }
1187         qpti->res_out_ptr = out_ptr;
1188 
1189         return done_queue;
1190 }
1191 
1192 static irqreturn_t qpti_intr(int irq, void *dev_id)
1193 {
1194         struct qlogicpti *qpti = dev_id;
1195         unsigned long flags;
1196         struct scsi_cmnd *dq;
1197 
1198         spin_lock_irqsave(qpti->qhost->host_lock, flags);
1199         dq = qlogicpti_intr_handler(qpti);
1200 
1201         if (dq != NULL) {
1202                 do {
1203                         struct scsi_cmnd *next;
1204 
1205                         next = (struct scsi_cmnd *) dq->host_scribble;
1206                         dq->scsi_done(dq);
1207                         dq = next;
1208                 } while (dq != NULL);
1209         }
1210         spin_unlock_irqrestore(qpti->qhost->host_lock, flags);
1211 
1212         return IRQ_HANDLED;
1213 }
1214 
1215 static int qlogicpti_abort(struct scsi_cmnd *Cmnd)
1216 {
1217         u_short param[6];
1218         struct Scsi_Host *host = Cmnd->device->host;
1219         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1220         int return_status = SUCCESS;
1221         u32 cmd_cookie;
1222         int i;
1223 
1224         printk(KERN_WARNING "qlogicpti%d: Aborting cmd for tgt[%d] lun[%d]\n",
1225                qpti->qpti_id, (int)Cmnd->device->id, (int)Cmnd->device->lun);
1226 
1227         qlogicpti_disable_irqs(qpti);
1228 
1229         /* Find the 32-bit cookie we gave to the firmware for
1230          * this command.
1231          */
1232         for (i = 0; i < QLOGICPTI_REQ_QUEUE_LEN + 1; i++)
1233                 if (qpti->cmd_slots[i] == Cmnd)
1234                         break;
1235         cmd_cookie = i;
1236 
1237         param[0] = MBOX_ABORT;
1238         param[1] = (((u_short) Cmnd->device->id) << 8) | Cmnd->device->lun;
1239         param[2] = cmd_cookie >> 16;
1240         param[3] = cmd_cookie & 0xffff;
1241         if (qlogicpti_mbox_command(qpti, param, 0) ||
1242             (param[0] != MBOX_COMMAND_COMPLETE)) {
1243                 printk(KERN_EMERG "qlogicpti%d: scsi abort failure: %x\n",
1244                        qpti->qpti_id, param[0]);
1245                 return_status = FAILED;
1246         }
1247 
1248         qlogicpti_enable_irqs(qpti);
1249 
1250         return return_status;
1251 }
1252 
1253 static int qlogicpti_reset(struct scsi_cmnd *Cmnd)
1254 {
1255         u_short param[6];
1256         struct Scsi_Host *host = Cmnd->device->host;
1257         struct qlogicpti *qpti = (struct qlogicpti *) host->hostdata;
1258         int return_status = SUCCESS;
1259 
1260         printk(KERN_WARNING "qlogicpti%d: Resetting SCSI bus!\n",
1261                qpti->qpti_id);
1262 
1263         qlogicpti_disable_irqs(qpti);
1264 
1265         param[0] = MBOX_BUS_RESET;
1266         param[1] = qpti->host_param.bus_reset_delay;
1267         if (qlogicpti_mbox_command(qpti, param, 0) ||
1268            (param[0] != MBOX_COMMAND_COMPLETE)) {
1269                 printk(KERN_EMERG "qlogicisp%d: scsi bus reset failure: %x\n",
1270                        qpti->qpti_id, param[0]);
1271                 return_status = FAILED;
1272         }
1273 
1274         qlogicpti_enable_irqs(qpti);
1275 
1276         return return_status;
1277 }
1278 
1279 static struct scsi_host_template qpti_template = {
1280         .module                 = THIS_MODULE,
1281         .name                   = "qlogicpti",
1282         .info                   = qlogicpti_info,
1283         .queuecommand           = qlogicpti_queuecommand,
1284         .slave_configure        = qlogicpti_slave_configure,
1285         .eh_abort_handler       = qlogicpti_abort,
1286         .eh_bus_reset_handler   = qlogicpti_reset,
1287         .can_queue              = QLOGICPTI_REQ_QUEUE_LEN,
1288         .this_id                = 7,
1289         .sg_tablesize           = QLOGICPTI_MAX_SG(QLOGICPTI_REQ_QUEUE_LEN),
1290         .cmd_per_lun            = 1,
1291         .use_clustering         = ENABLE_CLUSTERING,
1292 };
1293 
1294 static const struct of_device_id qpti_match[];
1295 static int qpti_sbus_probe(struct platform_device *op)
1296 {
1297         struct device_node *dp = op->dev.of_node;
1298         struct Scsi_Host *host;
1299         struct qlogicpti *qpti;
1300         static int nqptis;
1301         const char *fcode;
1302 
1303         /* Sometimes Antares cards come up not completely
1304          * setup, and we get a report of a zero IRQ.
1305          */
1306         if (op->archdata.irqs[0] == 0)
1307                 return -ENODEV;
1308 
1309         host = scsi_host_alloc(&qpti_template, sizeof(struct qlogicpti));
1310         if (!host)
1311                 return -ENOMEM;
1312 
1313         qpti = shost_priv(host);
1314 
1315         host->max_id = MAX_TARGETS;
1316         qpti->qhost = host;
1317         qpti->op = op;
1318         qpti->qpti_id = nqptis;
1319         strcpy(qpti->prom_name, op->dev.of_node->name);
1320         qpti->is_pti = strcmp(qpti->prom_name, "QLGC,isp");
1321 
1322         if (qpti_map_regs(qpti) < 0)
1323                 goto fail_unlink;
1324 
1325         if (qpti_register_irq(qpti) < 0)
1326                 goto fail_unmap_regs;
1327 
1328         qpti_get_scsi_id(qpti);
1329         qpti_get_bursts(qpti);
1330         qpti_get_clock(qpti);
1331 
1332         /* Clear out scsi_cmnd array. */
1333         memset(qpti->cmd_slots, 0, sizeof(qpti->cmd_slots));
1334 
1335         if (qpti_map_queues(qpti) < 0)
1336                 goto fail_free_irq;
1337 
1338         /* Load the firmware. */
1339         if (qlogicpti_load_firmware(qpti))
1340                 goto fail_unmap_queues;
1341         if (qpti->is_pti) {
1342                 /* Check the PTI status reg. */
1343                 if (qlogicpti_verify_tmon(qpti))
1344                         goto fail_unmap_queues;
1345         }
1346 
1347         /* Reset the ISP and init res/req queues. */
1348         if (qlogicpti_reset_hardware(host))
1349                 goto fail_unmap_queues;
1350 
1351         printk("(Firmware v%d.%d.%d)", qpti->fware_majrev,
1352                qpti->fware_minrev, qpti->fware_micrev);
1353 
1354         fcode = of_get_property(dp, "isp-fcode", NULL);
1355         if (fcode && fcode[0])
1356                 printk("(FCode %s)", fcode);
1357         if (of_find_property(dp, "differential", NULL) != NULL)
1358                 qpti->differential = 1;
1359                         
1360         printk("\nqlogicpti%d: [%s Wide, using %s interface]\n",
1361                 qpti->qpti_id,
1362                 (qpti->ultra ? "Ultra" : "Fast"),
1363                 (qpti->differential ? "differential" : "single ended"));
1364 
1365         if (scsi_add_host(host, &op->dev)) {
1366                 printk("qlogicpti%d: Failed scsi_add_host\n", qpti->qpti_id);
1367                 goto fail_unmap_queues;
1368         }
1369 
1370         dev_set_drvdata(&op->dev, qpti);
1371 
1372         qpti_chain_add(qpti);
1373 
1374         scsi_scan_host(host);
1375         nqptis++;
1376 
1377         return 0;
1378 
1379 fail_unmap_queues:
1380 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1381         dma_free_coherent(&op->dev,
1382                           QSIZE(RES_QUEUE_LEN),
1383                           qpti->res_cpu, qpti->res_dvma);
1384         dma_free_coherent(&op->dev,
1385                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1386                           qpti->req_cpu, qpti->req_dvma);
1387 #undef QSIZE
1388 
1389 fail_unmap_regs:
1390         of_iounmap(&op->resource[0], qpti->qregs,
1391                    resource_size(&op->resource[0]));
1392         if (qpti->is_pti)
1393                 of_iounmap(&op->resource[0], qpti->sreg,
1394                            sizeof(unsigned char));
1395 
1396 fail_free_irq:
1397         free_irq(qpti->irq, qpti);
1398 
1399 fail_unlink:
1400         scsi_host_put(host);
1401 
1402         return -ENODEV;
1403 }
1404 
1405 static int qpti_sbus_remove(struct platform_device *op)
1406 {
1407         struct qlogicpti *qpti = dev_get_drvdata(&op->dev);
1408 
1409         qpti_chain_del(qpti);
1410 
1411         scsi_remove_host(qpti->qhost);
1412 
1413         /* Shut up the card. */
1414         sbus_writew(0, qpti->qregs + SBUS_CTRL);
1415 
1416         /* Free IRQ handler and unmap Qlogic,ISP and PTI status regs. */
1417         free_irq(qpti->irq, qpti);
1418 
1419 #define QSIZE(entries)  (((entries) + 1) * QUEUE_ENTRY_LEN)
1420         dma_free_coherent(&op->dev,
1421                           QSIZE(RES_QUEUE_LEN),
1422                           qpti->res_cpu, qpti->res_dvma);
1423         dma_free_coherent(&op->dev,
1424                           QSIZE(QLOGICPTI_REQ_QUEUE_LEN),
1425                           qpti->req_cpu, qpti->req_dvma);
1426 #undef QSIZE
1427 
1428         of_iounmap(&op->resource[0], qpti->qregs,
1429                    resource_size(&op->resource[0]));
1430         if (qpti->is_pti)
1431                 of_iounmap(&op->resource[0], qpti->sreg, sizeof(unsigned char));
1432 
1433         scsi_host_put(qpti->qhost);
1434 
1435         return 0;
1436 }
1437 
1438 static const struct of_device_id qpti_match[] = {
1439         {
1440                 .name = "ptisp",
1441         },
1442         {
1443                 .name = "PTI,ptisp",
1444         },
1445         {
1446                 .name = "QLGC,isp",
1447         },
1448         {
1449                 .name = "SUNW,isp",
1450         },
1451         {},
1452 };
1453 MODULE_DEVICE_TABLE(of, qpti_match);
1454 
1455 static struct platform_driver qpti_sbus_driver = {
1456         .driver = {
1457                 .name = "qpti",
1458                 .owner = THIS_MODULE,
1459                 .of_match_table = qpti_match,
1460         },
1461         .probe          = qpti_sbus_probe,
1462         .remove         = qpti_sbus_remove,
1463 };
1464 
1465 static int __init qpti_init(void)
1466 {
1467         return platform_driver_register(&qpti_sbus_driver);
1468 }
1469 
1470 static void __exit qpti_exit(void)
1471 {
1472         platform_driver_unregister(&qpti_sbus_driver);
1473 }
1474 
1475 MODULE_DESCRIPTION("QlogicISP SBUS driver");
1476 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
1477 MODULE_LICENSE("GPL");
1478 MODULE_VERSION("2.1");
1479 MODULE_FIRMWARE("qlogic/isp1000.bin");
1480 
1481 module_init(qpti_init);
1482 module_exit(qpti_exit);
1483 

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