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Linux/drivers/ata/sata_mv.c

  1 /*
  2  * sata_mv.c - Marvell SATA support
  3  *
  4  * Copyright 2008-2009: Marvell Corporation, all rights reserved.
  5  * Copyright 2005: EMC Corporation, all rights reserved.
  6  * Copyright 2005 Red Hat, Inc.  All rights reserved.
  7  *
  8  * Originally written by Brett Russ.
  9  * Extensive overhaul and enhancement by Mark Lord <mlord@pobox.com>.
 10  *
 11  * Please ALWAYS copy linux-ide@vger.kernel.org on emails.
 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 as published by
 15  * the Free Software Foundation; version 2 of the License.
 16  *
 17  * This program is distributed in the hope that it will be useful,
 18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 20  * GNU General Public License for more details.
 21  *
 22  * You should have received a copy of the GNU General Public License
 23  * along with this program; if not, write to the Free Software
 24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 25  *
 26  */
 27 
 28 /*
 29  * sata_mv TODO list:
 30  *
 31  * --> Develop a low-power-consumption strategy, and implement it.
 32  *
 33  * --> Add sysfs attributes for per-chip / per-HC IRQ coalescing thresholds.
 34  *
 35  * --> [Experiment, Marvell value added] Is it possible to use target
 36  *       mode to cross-connect two Linux boxes with Marvell cards?  If so,
 37  *       creating LibATA target mode support would be very interesting.
 38  *
 39  *       Target mode, for those without docs, is the ability to directly
 40  *       connect two SATA ports.
 41  */
 42 
 43 /*
 44  * 80x1-B2 errata PCI#11:
 45  *
 46  * Users of the 6041/6081 Rev.B2 chips (current is C0)
 47  * should be careful to insert those cards only onto PCI-X bus #0,
 48  * and only in device slots 0..7, not higher.  The chips may not
 49  * work correctly otherwise  (note: this is a pretty rare condition).
 50  */
 51 
 52 #include <linux/kernel.h>
 53 #include <linux/module.h>
 54 #include <linux/pci.h>
 55 #include <linux/init.h>
 56 #include <linux/blkdev.h>
 57 #include <linux/delay.h>
 58 #include <linux/interrupt.h>
 59 #include <linux/dmapool.h>
 60 #include <linux/dma-mapping.h>
 61 #include <linux/device.h>
 62 #include <linux/clk.h>
 63 #include <linux/phy/phy.h>
 64 #include <linux/platform_device.h>
 65 #include <linux/ata_platform.h>
 66 #include <linux/mbus.h>
 67 #include <linux/bitops.h>
 68 #include <linux/gfp.h>
 69 #include <linux/of.h>
 70 #include <linux/of_irq.h>
 71 #include <scsi/scsi_host.h>
 72 #include <scsi/scsi_cmnd.h>
 73 #include <scsi/scsi_device.h>
 74 #include <linux/libata.h>
 75 
 76 #define DRV_NAME        "sata_mv"
 77 #define DRV_VERSION     "1.28"
 78 
 79 /*
 80  * module options
 81  */
 82 
 83 #ifdef CONFIG_PCI
 84 static int msi;
 85 module_param(msi, int, S_IRUGO);
 86 MODULE_PARM_DESC(msi, "Enable use of PCI MSI (0=off, 1=on)");
 87 #endif
 88 
 89 static int irq_coalescing_io_count;
 90 module_param(irq_coalescing_io_count, int, S_IRUGO);
 91 MODULE_PARM_DESC(irq_coalescing_io_count,
 92                  "IRQ coalescing I/O count threshold (0..255)");
 93 
 94 static int irq_coalescing_usecs;
 95 module_param(irq_coalescing_usecs, int, S_IRUGO);
 96 MODULE_PARM_DESC(irq_coalescing_usecs,
 97                  "IRQ coalescing time threshold in usecs");
 98 
 99 enum {
100         /* BAR's are enumerated in terms of pci_resource_start() terms */
101         MV_PRIMARY_BAR          = 0,    /* offset 0x10: memory space */
102         MV_IO_BAR               = 2,    /* offset 0x18: IO space */
103         MV_MISC_BAR             = 3,    /* offset 0x1c: FLASH, NVRAM, SRAM */
104 
105         MV_MAJOR_REG_AREA_SZ    = 0x10000,      /* 64KB */
106         MV_MINOR_REG_AREA_SZ    = 0x2000,       /* 8KB */
107 
108         /* For use with both IRQ coalescing methods ("all ports" or "per-HC" */
109         COAL_CLOCKS_PER_USEC    = 150,          /* for calculating COAL_TIMEs */
110         MAX_COAL_TIME_THRESHOLD = ((1 << 24) - 1), /* internal clocks count */
111         MAX_COAL_IO_COUNT       = 255,          /* completed I/O count */
112 
113         MV_PCI_REG_BASE         = 0,
114 
115         /*
116          * Per-chip ("all ports") interrupt coalescing feature.
117          * This is only for GEN_II / GEN_IIE hardware.
118          *
119          * Coalescing defers the interrupt until either the IO_THRESHOLD
120          * (count of completed I/Os) is met, or the TIME_THRESHOLD is met.
121          */
122         COAL_REG_BASE           = 0x18000,
123         IRQ_COAL_CAUSE          = (COAL_REG_BASE + 0x08),
124         ALL_PORTS_COAL_IRQ      = (1 << 4),     /* all ports irq event */
125 
126         IRQ_COAL_IO_THRESHOLD   = (COAL_REG_BASE + 0xcc),
127         IRQ_COAL_TIME_THRESHOLD = (COAL_REG_BASE + 0xd0),
128 
129         /*
130          * Registers for the (unused here) transaction coalescing feature:
131          */
132         TRAN_COAL_CAUSE_LO      = (COAL_REG_BASE + 0x88),
133         TRAN_COAL_CAUSE_HI      = (COAL_REG_BASE + 0x8c),
134 
135         SATAHC0_REG_BASE        = 0x20000,
136         FLASH_CTL               = 0x1046c,
137         GPIO_PORT_CTL           = 0x104f0,
138         RESET_CFG               = 0x180d8,
139 
140         MV_PCI_REG_SZ           = MV_MAJOR_REG_AREA_SZ,
141         MV_SATAHC_REG_SZ        = MV_MAJOR_REG_AREA_SZ,
142         MV_SATAHC_ARBTR_REG_SZ  = MV_MINOR_REG_AREA_SZ,         /* arbiter */
143         MV_PORT_REG_SZ          = MV_MINOR_REG_AREA_SZ,
144 
145         MV_MAX_Q_DEPTH          = 32,
146         MV_MAX_Q_DEPTH_MASK     = MV_MAX_Q_DEPTH - 1,
147 
148         /* CRQB needs alignment on a 1KB boundary. Size == 1KB
149          * CRPB needs alignment on a 256B boundary. Size == 256B
150          * ePRD (SG) entries need alignment on a 16B boundary. Size == 16B
151          */
152         MV_CRQB_Q_SZ            = (32 * MV_MAX_Q_DEPTH),
153         MV_CRPB_Q_SZ            = (8 * MV_MAX_Q_DEPTH),
154         MV_MAX_SG_CT            = 256,
155         MV_SG_TBL_SZ            = (16 * MV_MAX_SG_CT),
156 
157         /* Determine hc from 0-7 port: hc = port >> MV_PORT_HC_SHIFT */
158         MV_PORT_HC_SHIFT        = 2,
159         MV_PORTS_PER_HC         = (1 << MV_PORT_HC_SHIFT), /* 4 */
160         /* Determine hc port from 0-7 port: hardport = port & MV_PORT_MASK */
161         MV_PORT_MASK            = (MV_PORTS_PER_HC - 1),   /* 3 */
162 
163         /* Host Flags */
164         MV_FLAG_DUAL_HC         = (1 << 30),  /* two SATA Host Controllers */
165 
166         MV_COMMON_FLAGS         = ATA_FLAG_SATA | ATA_FLAG_PIO_POLLING,
167 
168         MV_GEN_I_FLAGS          = MV_COMMON_FLAGS | ATA_FLAG_NO_ATAPI,
169 
170         MV_GEN_II_FLAGS         = MV_COMMON_FLAGS | ATA_FLAG_NCQ |
171                                   ATA_FLAG_PMP | ATA_FLAG_ACPI_SATA,
172 
173         MV_GEN_IIE_FLAGS        = MV_GEN_II_FLAGS | ATA_FLAG_AN,
174 
175         CRQB_FLAG_READ          = (1 << 0),
176         CRQB_TAG_SHIFT          = 1,
177         CRQB_IOID_SHIFT         = 6,    /* CRQB Gen-II/IIE IO Id shift */
178         CRQB_PMP_SHIFT          = 12,   /* CRQB Gen-II/IIE PMP shift */
179         CRQB_HOSTQ_SHIFT        = 17,   /* CRQB Gen-II/IIE HostQueTag shift */
180         CRQB_CMD_ADDR_SHIFT     = 8,
181         CRQB_CMD_CS             = (0x2 << 11),
182         CRQB_CMD_LAST           = (1 << 15),
183 
184         CRPB_FLAG_STATUS_SHIFT  = 8,
185         CRPB_IOID_SHIFT_6       = 5,    /* CRPB Gen-II IO Id shift */
186         CRPB_IOID_SHIFT_7       = 7,    /* CRPB Gen-IIE IO Id shift */
187 
188         EPRD_FLAG_END_OF_TBL    = (1 << 31),
189 
190         /* PCI interface registers */
191 
192         MV_PCI_COMMAND          = 0xc00,
193         MV_PCI_COMMAND_MWRCOM   = (1 << 4),     /* PCI Master Write Combining */
194         MV_PCI_COMMAND_MRDTRIG  = (1 << 7),     /* PCI Master Read Trigger */
195 
196         PCI_MAIN_CMD_STS        = 0xd30,
197         STOP_PCI_MASTER         = (1 << 2),
198         PCI_MASTER_EMPTY        = (1 << 3),
199         GLOB_SFT_RST            = (1 << 4),
200 
201         MV_PCI_MODE             = 0xd00,
202         MV_PCI_MODE_MASK        = 0x30,
203 
204         MV_PCI_EXP_ROM_BAR_CTL  = 0xd2c,
205         MV_PCI_DISC_TIMER       = 0xd04,
206         MV_PCI_MSI_TRIGGER      = 0xc38,
207         MV_PCI_SERR_MASK        = 0xc28,
208         MV_PCI_XBAR_TMOUT       = 0x1d04,
209         MV_PCI_ERR_LOW_ADDRESS  = 0x1d40,
210         MV_PCI_ERR_HIGH_ADDRESS = 0x1d44,
211         MV_PCI_ERR_ATTRIBUTE    = 0x1d48,
212         MV_PCI_ERR_COMMAND      = 0x1d50,
213 
214         PCI_IRQ_CAUSE           = 0x1d58,
215         PCI_IRQ_MASK            = 0x1d5c,
216         PCI_UNMASK_ALL_IRQS     = 0x7fffff,     /* bits 22-0 */
217 
218         PCIE_IRQ_CAUSE          = 0x1900,
219         PCIE_IRQ_MASK           = 0x1910,
220         PCIE_UNMASK_ALL_IRQS    = 0x40a,        /* assorted bits */
221 
222         /* Host Controller Main Interrupt Cause/Mask registers (1 per-chip) */
223         PCI_HC_MAIN_IRQ_CAUSE   = 0x1d60,
224         PCI_HC_MAIN_IRQ_MASK    = 0x1d64,
225         SOC_HC_MAIN_IRQ_CAUSE   = 0x20020,
226         SOC_HC_MAIN_IRQ_MASK    = 0x20024,
227         ERR_IRQ                 = (1 << 0),     /* shift by (2 * port #) */
228         DONE_IRQ                = (1 << 1),     /* shift by (2 * port #) */
229         HC0_IRQ_PEND            = 0x1ff,        /* bits 0-8 = HC0's ports */
230         HC_SHIFT                = 9,            /* bits 9-17 = HC1's ports */
231         DONE_IRQ_0_3            = 0x000000aa,   /* DONE_IRQ ports 0,1,2,3 */
232         DONE_IRQ_4_7            = (DONE_IRQ_0_3 << HC_SHIFT),  /* 4,5,6,7 */
233         PCI_ERR                 = (1 << 18),
234         TRAN_COAL_LO_DONE       = (1 << 19),    /* transaction coalescing */
235         TRAN_COAL_HI_DONE       = (1 << 20),    /* transaction coalescing */
236         PORTS_0_3_COAL_DONE     = (1 << 8),     /* HC0 IRQ coalescing */
237         PORTS_4_7_COAL_DONE     = (1 << 17),    /* HC1 IRQ coalescing */
238         ALL_PORTS_COAL_DONE     = (1 << 21),    /* GEN_II(E) IRQ coalescing */
239         GPIO_INT                = (1 << 22),
240         SELF_INT                = (1 << 23),
241         TWSI_INT                = (1 << 24),
242         HC_MAIN_RSVD            = (0x7f << 25), /* bits 31-25 */
243         HC_MAIN_RSVD_5          = (0x1fff << 19), /* bits 31-19 */
244         HC_MAIN_RSVD_SOC        = (0x3fffffb << 6),     /* bits 31-9, 7-6 */
245 
246         /* SATAHC registers */
247         HC_CFG                  = 0x00,
248 
249         HC_IRQ_CAUSE            = 0x14,
250         DMA_IRQ                 = (1 << 0),     /* shift by port # */
251         HC_COAL_IRQ             = (1 << 4),     /* IRQ coalescing */
252         DEV_IRQ                 = (1 << 8),     /* shift by port # */
253 
254         /*
255          * Per-HC (Host-Controller) interrupt coalescing feature.
256          * This is present on all chip generations.
257          *
258          * Coalescing defers the interrupt until either the IO_THRESHOLD
259          * (count of completed I/Os) is met, or the TIME_THRESHOLD is met.
260          */
261         HC_IRQ_COAL_IO_THRESHOLD        = 0x000c,
262         HC_IRQ_COAL_TIME_THRESHOLD      = 0x0010,
263 
264         SOC_LED_CTRL            = 0x2c,
265         SOC_LED_CTRL_BLINK      = (1 << 0),     /* Active LED blink */
266         SOC_LED_CTRL_ACT_PRESENCE = (1 << 2),   /* Multiplex dev presence */
267                                                 /*  with dev activity LED */
268 
269         /* Shadow block registers */
270         SHD_BLK                 = 0x100,
271         SHD_CTL_AST             = 0x20,         /* ofs from SHD_BLK */
272 
273         /* SATA registers */
274         SATA_STATUS             = 0x300,  /* ctrl, err regs follow status */
275         SATA_ACTIVE             = 0x350,
276         FIS_IRQ_CAUSE           = 0x364,
277         FIS_IRQ_CAUSE_AN        = (1 << 9),     /* async notification */
278 
279         LTMODE                  = 0x30c,        /* requires read-after-write */
280         LTMODE_BIT8             = (1 << 8),     /* unknown, but necessary */
281 
282         PHY_MODE2               = 0x330,
283         PHY_MODE3               = 0x310,
284 
285         PHY_MODE4               = 0x314,        /* requires read-after-write */
286         PHY_MODE4_CFG_MASK      = 0x00000003,   /* phy internal config field */
287         PHY_MODE4_CFG_VALUE     = 0x00000001,   /* phy internal config field */
288         PHY_MODE4_RSVD_ZEROS    = 0x5de3fffa,   /* Gen2e always write zeros */
289         PHY_MODE4_RSVD_ONES     = 0x00000005,   /* Gen2e always write ones */
290 
291         SATA_IFCTL              = 0x344,
292         SATA_TESTCTL            = 0x348,
293         SATA_IFSTAT             = 0x34c,
294         VENDOR_UNIQUE_FIS       = 0x35c,
295 
296         FISCFG                  = 0x360,
297         FISCFG_WAIT_DEV_ERR     = (1 << 8),     /* wait for host on DevErr */
298         FISCFG_SINGLE_SYNC      = (1 << 16),    /* SYNC on DMA activation */
299 
300         PHY_MODE9_GEN2          = 0x398,
301         PHY_MODE9_GEN1          = 0x39c,
302         PHYCFG_OFS              = 0x3a0,        /* only in 65n devices */
303 
304         MV5_PHY_MODE            = 0x74,
305         MV5_LTMODE              = 0x30,
306         MV5_PHY_CTL             = 0x0C,
307         SATA_IFCFG              = 0x050,
308         LP_PHY_CTL              = 0x058,
309         LP_PHY_CTL_PIN_PU_PLL   = (1 << 0),
310         LP_PHY_CTL_PIN_PU_RX    = (1 << 1),
311         LP_PHY_CTL_PIN_PU_TX    = (1 << 2),
312         LP_PHY_CTL_GEN_TX_3G    = (1 << 5),
313         LP_PHY_CTL_GEN_RX_3G    = (1 << 9),
314 
315         MV_M2_PREAMP_MASK       = 0x7e0,
316 
317         /* Port registers */
318         EDMA_CFG                = 0,
319         EDMA_CFG_Q_DEPTH        = 0x1f,         /* max device queue depth */
320         EDMA_CFG_NCQ            = (1 << 5),     /* for R/W FPDMA queued */
321         EDMA_CFG_NCQ_GO_ON_ERR  = (1 << 14),    /* continue on error */
322         EDMA_CFG_RD_BRST_EXT    = (1 << 11),    /* read burst 512B */
323         EDMA_CFG_WR_BUFF_LEN    = (1 << 13),    /* write buffer 512B */
324         EDMA_CFG_EDMA_FBS       = (1 << 16),    /* EDMA FIS-Based Switching */
325         EDMA_CFG_FBS            = (1 << 26),    /* FIS-Based Switching */
326 
327         EDMA_ERR_IRQ_CAUSE      = 0x8,
328         EDMA_ERR_IRQ_MASK       = 0xc,
329         EDMA_ERR_D_PAR          = (1 << 0),     /* UDMA data parity err */
330         EDMA_ERR_PRD_PAR        = (1 << 1),     /* UDMA PRD parity err */
331         EDMA_ERR_DEV            = (1 << 2),     /* device error */
332         EDMA_ERR_DEV_DCON       = (1 << 3),     /* device disconnect */
333         EDMA_ERR_DEV_CON        = (1 << 4),     /* device connected */
334         EDMA_ERR_SERR           = (1 << 5),     /* SError bits [WBDST] raised */
335         EDMA_ERR_SELF_DIS       = (1 << 7),     /* Gen II/IIE self-disable */
336         EDMA_ERR_SELF_DIS_5     = (1 << 8),     /* Gen I self-disable */
337         EDMA_ERR_BIST_ASYNC     = (1 << 8),     /* BIST FIS or Async Notify */
338         EDMA_ERR_TRANS_IRQ_7    = (1 << 8),     /* Gen IIE transprt layer irq */
339         EDMA_ERR_CRQB_PAR       = (1 << 9),     /* CRQB parity error */
340         EDMA_ERR_CRPB_PAR       = (1 << 10),    /* CRPB parity error */
341         EDMA_ERR_INTRL_PAR      = (1 << 11),    /* internal parity error */
342         EDMA_ERR_IORDY          = (1 << 12),    /* IORdy timeout */
343 
344         EDMA_ERR_LNK_CTRL_RX    = (0xf << 13),  /* link ctrl rx error */
345         EDMA_ERR_LNK_CTRL_RX_0  = (1 << 13),    /* transient: CRC err */
346         EDMA_ERR_LNK_CTRL_RX_1  = (1 << 14),    /* transient: FIFO err */
347         EDMA_ERR_LNK_CTRL_RX_2  = (1 << 15),    /* fatal: caught SYNC */
348         EDMA_ERR_LNK_CTRL_RX_3  = (1 << 16),    /* transient: FIS rx err */
349 
350         EDMA_ERR_LNK_DATA_RX    = (0xf << 17),  /* link data rx error */
351 
352         EDMA_ERR_LNK_CTRL_TX    = (0x1f << 21), /* link ctrl tx error */
353         EDMA_ERR_LNK_CTRL_TX_0  = (1 << 21),    /* transient: CRC err */
354         EDMA_ERR_LNK_CTRL_TX_1  = (1 << 22),    /* transient: FIFO err */
355         EDMA_ERR_LNK_CTRL_TX_2  = (1 << 23),    /* transient: caught SYNC */
356         EDMA_ERR_LNK_CTRL_TX_3  = (1 << 24),    /* transient: caught DMAT */
357         EDMA_ERR_LNK_CTRL_TX_4  = (1 << 25),    /* transient: FIS collision */
358 
359         EDMA_ERR_LNK_DATA_TX    = (0x1f << 26), /* link data tx error */
360 
361         EDMA_ERR_TRANS_PROTO    = (1 << 31),    /* transport protocol error */
362         EDMA_ERR_OVERRUN_5      = (1 << 5),
363         EDMA_ERR_UNDERRUN_5     = (1 << 6),
364 
365         EDMA_ERR_IRQ_TRANSIENT  = EDMA_ERR_LNK_CTRL_RX_0 |
366                                   EDMA_ERR_LNK_CTRL_RX_1 |
367                                   EDMA_ERR_LNK_CTRL_RX_3 |
368                                   EDMA_ERR_LNK_CTRL_TX,
369 
370         EDMA_EH_FREEZE          = EDMA_ERR_D_PAR |
371                                   EDMA_ERR_PRD_PAR |
372                                   EDMA_ERR_DEV_DCON |
373                                   EDMA_ERR_DEV_CON |
374                                   EDMA_ERR_SERR |
375                                   EDMA_ERR_SELF_DIS |
376                                   EDMA_ERR_CRQB_PAR |
377                                   EDMA_ERR_CRPB_PAR |
378                                   EDMA_ERR_INTRL_PAR |
379                                   EDMA_ERR_IORDY |
380                                   EDMA_ERR_LNK_CTRL_RX_2 |
381                                   EDMA_ERR_LNK_DATA_RX |
382                                   EDMA_ERR_LNK_DATA_TX |
383                                   EDMA_ERR_TRANS_PROTO,
384 
385         EDMA_EH_FREEZE_5        = EDMA_ERR_D_PAR |
386                                   EDMA_ERR_PRD_PAR |
387                                   EDMA_ERR_DEV_DCON |
388                                   EDMA_ERR_DEV_CON |
389                                   EDMA_ERR_OVERRUN_5 |
390                                   EDMA_ERR_UNDERRUN_5 |
391                                   EDMA_ERR_SELF_DIS_5 |
392                                   EDMA_ERR_CRQB_PAR |
393                                   EDMA_ERR_CRPB_PAR |
394                                   EDMA_ERR_INTRL_PAR |
395                                   EDMA_ERR_IORDY,
396 
397         EDMA_REQ_Q_BASE_HI      = 0x10,
398         EDMA_REQ_Q_IN_PTR       = 0x14,         /* also contains BASE_LO */
399 
400         EDMA_REQ_Q_OUT_PTR      = 0x18,
401         EDMA_REQ_Q_PTR_SHIFT    = 5,
402 
403         EDMA_RSP_Q_BASE_HI      = 0x1c,
404         EDMA_RSP_Q_IN_PTR       = 0x20,
405         EDMA_RSP_Q_OUT_PTR      = 0x24,         /* also contains BASE_LO */
406         EDMA_RSP_Q_PTR_SHIFT    = 3,
407 
408         EDMA_CMD                = 0x28,         /* EDMA command register */
409         EDMA_EN                 = (1 << 0),     /* enable EDMA */
410         EDMA_DS                 = (1 << 1),     /* disable EDMA; self-negated */
411         EDMA_RESET              = (1 << 2),     /* reset eng/trans/link/phy */
412 
413         EDMA_STATUS             = 0x30,         /* EDMA engine status */
414         EDMA_STATUS_CACHE_EMPTY = (1 << 6),     /* GenIIe command cache empty */
415         EDMA_STATUS_IDLE        = (1 << 7),     /* GenIIe EDMA enabled/idle */
416 
417         EDMA_IORDY_TMOUT        = 0x34,
418         EDMA_ARB_CFG            = 0x38,
419 
420         EDMA_HALTCOND           = 0x60,         /* GenIIe halt conditions */
421         EDMA_UNKNOWN_RSVD       = 0x6C,         /* GenIIe unknown/reserved */
422 
423         BMDMA_CMD               = 0x224,        /* bmdma command register */
424         BMDMA_STATUS            = 0x228,        /* bmdma status register */
425         BMDMA_PRD_LOW           = 0x22c,        /* bmdma PRD addr 31:0 */
426         BMDMA_PRD_HIGH          = 0x230,        /* bmdma PRD addr 63:32 */
427 
428         /* Host private flags (hp_flags) */
429         MV_HP_FLAG_MSI          = (1 << 0),
430         MV_HP_ERRATA_50XXB0     = (1 << 1),
431         MV_HP_ERRATA_50XXB2     = (1 << 2),
432         MV_HP_ERRATA_60X1B2     = (1 << 3),
433         MV_HP_ERRATA_60X1C0     = (1 << 4),
434         MV_HP_GEN_I             = (1 << 6),     /* Generation I: 50xx */
435         MV_HP_GEN_II            = (1 << 7),     /* Generation II: 60xx */
436         MV_HP_GEN_IIE           = (1 << 8),     /* Generation IIE: 6042/7042 */
437         MV_HP_PCIE              = (1 << 9),     /* PCIe bus/regs: 7042 */
438         MV_HP_CUT_THROUGH       = (1 << 10),    /* can use EDMA cut-through */
439         MV_HP_FLAG_SOC          = (1 << 11),    /* SystemOnChip, no PCI */
440         MV_HP_QUIRK_LED_BLINK_EN = (1 << 12),   /* is led blinking enabled? */
441         MV_HP_FIX_LP_PHY_CTL    = (1 << 13),    /* fix speed in LP_PHY_CTL ? */
442 
443         /* Port private flags (pp_flags) */
444         MV_PP_FLAG_EDMA_EN      = (1 << 0),     /* is EDMA engine enabled? */
445         MV_PP_FLAG_NCQ_EN       = (1 << 1),     /* is EDMA set up for NCQ? */
446         MV_PP_FLAG_FBS_EN       = (1 << 2),     /* is EDMA set up for FBS? */
447         MV_PP_FLAG_DELAYED_EH   = (1 << 3),     /* delayed dev err handling */
448         MV_PP_FLAG_FAKE_ATA_BUSY = (1 << 4),    /* ignore initial ATA_DRDY */
449 };
450 
451 #define IS_GEN_I(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_I)
452 #define IS_GEN_II(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_II)
453 #define IS_GEN_IIE(hpriv) ((hpriv)->hp_flags & MV_HP_GEN_IIE)
454 #define IS_PCIE(hpriv) ((hpriv)->hp_flags & MV_HP_PCIE)
455 #define IS_SOC(hpriv) ((hpriv)->hp_flags & MV_HP_FLAG_SOC)
456 
457 #define WINDOW_CTRL(i)          (0x20030 + ((i) << 4))
458 #define WINDOW_BASE(i)          (0x20034 + ((i) << 4))
459 
460 enum {
461         /* DMA boundary 0xffff is required by the s/g splitting
462          * we need on /length/ in mv_fill-sg().
463          */
464         MV_DMA_BOUNDARY         = 0xffffU,
465 
466         /* mask of register bits containing lower 32 bits
467          * of EDMA request queue DMA address
468          */
469         EDMA_REQ_Q_BASE_LO_MASK = 0xfffffc00U,
470 
471         /* ditto, for response queue */
472         EDMA_RSP_Q_BASE_LO_MASK = 0xffffff00U,
473 };
474 
475 enum chip_type {
476         chip_504x,
477         chip_508x,
478         chip_5080,
479         chip_604x,
480         chip_608x,
481         chip_6042,
482         chip_7042,
483         chip_soc,
484 };
485 
486 /* Command ReQuest Block: 32B */
487 struct mv_crqb {
488         __le32                  sg_addr;
489         __le32                  sg_addr_hi;
490         __le16                  ctrl_flags;
491         __le16                  ata_cmd[11];
492 };
493 
494 struct mv_crqb_iie {
495         __le32                  addr;
496         __le32                  addr_hi;
497         __le32                  flags;
498         __le32                  len;
499         __le32                  ata_cmd[4];
500 };
501 
502 /* Command ResPonse Block: 8B */
503 struct mv_crpb {
504         __le16                  id;
505         __le16                  flags;
506         __le32                  tmstmp;
507 };
508 
509 /* EDMA Physical Region Descriptor (ePRD); A.K.A. SG */
510 struct mv_sg {
511         __le32                  addr;
512         __le32                  flags_size;
513         __le32                  addr_hi;
514         __le32                  reserved;
515 };
516 
517 /*
518  * We keep a local cache of a few frequently accessed port
519  * registers here, to avoid having to read them (very slow)
520  * when switching between EDMA and non-EDMA modes.
521  */
522 struct mv_cached_regs {
523         u32                     fiscfg;
524         u32                     ltmode;
525         u32                     haltcond;
526         u32                     unknown_rsvd;
527 };
528 
529 struct mv_port_priv {
530         struct mv_crqb          *crqb;
531         dma_addr_t              crqb_dma;
532         struct mv_crpb          *crpb;
533         dma_addr_t              crpb_dma;
534         struct mv_sg            *sg_tbl[MV_MAX_Q_DEPTH];
535         dma_addr_t              sg_tbl_dma[MV_MAX_Q_DEPTH];
536 
537         unsigned int            req_idx;
538         unsigned int            resp_idx;
539 
540         u32                     pp_flags;
541         struct mv_cached_regs   cached;
542         unsigned int            delayed_eh_pmp_map;
543 };
544 
545 struct mv_port_signal {
546         u32                     amps;
547         u32                     pre;
548 };
549 
550 struct mv_host_priv {
551         u32                     hp_flags;
552         unsigned int            board_idx;
553         u32                     main_irq_mask;
554         struct mv_port_signal   signal[8];
555         const struct mv_hw_ops  *ops;
556         int                     n_ports;
557         void __iomem            *base;
558         void __iomem            *main_irq_cause_addr;
559         void __iomem            *main_irq_mask_addr;
560         u32                     irq_cause_offset;
561         u32                     irq_mask_offset;
562         u32                     unmask_all_irqs;
563 
564         /*
565          * Needed on some devices that require their clocks to be enabled.
566          * These are optional: if the platform device does not have any
567          * clocks, they won't be used.  Also, if the underlying hardware
568          * does not support the common clock framework (CONFIG_HAVE_CLK=n),
569          * all the clock operations become no-ops (see clk.h).
570          */
571         struct clk              *clk;
572         struct clk              **port_clks;
573         /*
574          * Some devices have a SATA PHY which can be enabled/disabled
575          * in order to save power. These are optional: if the platform
576          * devices does not have any phy, they won't be used.
577          */
578         struct phy              **port_phys;
579         /*
580          * These consistent DMA memory pools give us guaranteed
581          * alignment for hardware-accessed data structures,
582          * and less memory waste in accomplishing the alignment.
583          */
584         struct dma_pool         *crqb_pool;
585         struct dma_pool         *crpb_pool;
586         struct dma_pool         *sg_tbl_pool;
587 };
588 
589 struct mv_hw_ops {
590         void (*phy_errata)(struct mv_host_priv *hpriv, void __iomem *mmio,
591                            unsigned int port);
592         void (*enable_leds)(struct mv_host_priv *hpriv, void __iomem *mmio);
593         void (*read_preamp)(struct mv_host_priv *hpriv, int idx,
594                            void __iomem *mmio);
595         int (*reset_hc)(struct mv_host_priv *hpriv, void __iomem *mmio,
596                         unsigned int n_hc);
597         void (*reset_flash)(struct mv_host_priv *hpriv, void __iomem *mmio);
598         void (*reset_bus)(struct ata_host *host, void __iomem *mmio);
599 };
600 
601 static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val);
602 static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val);
603 static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val);
604 static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val);
605 static int mv_port_start(struct ata_port *ap);
606 static void mv_port_stop(struct ata_port *ap);
607 static int mv_qc_defer(struct ata_queued_cmd *qc);
608 static void mv_qc_prep(struct ata_queued_cmd *qc);
609 static void mv_qc_prep_iie(struct ata_queued_cmd *qc);
610 static unsigned int mv_qc_issue(struct ata_queued_cmd *qc);
611 static int mv_hardreset(struct ata_link *link, unsigned int *class,
612                         unsigned long deadline);
613 static void mv_eh_freeze(struct ata_port *ap);
614 static void mv_eh_thaw(struct ata_port *ap);
615 static void mv6_dev_config(struct ata_device *dev);
616 
617 static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
618                            unsigned int port);
619 static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio);
620 static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
621                            void __iomem *mmio);
622 static int mv5_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
623                         unsigned int n_hc);
624 static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
625 static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio);
626 
627 static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
628                            unsigned int port);
629 static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio);
630 static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
631                            void __iomem *mmio);
632 static int mv6_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
633                         unsigned int n_hc);
634 static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio);
635 static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
636                                       void __iomem *mmio);
637 static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
638                                       void __iomem *mmio);
639 static int mv_soc_reset_hc(struct mv_host_priv *hpriv,
640                                   void __iomem *mmio, unsigned int n_hc);
641 static void mv_soc_reset_flash(struct mv_host_priv *hpriv,
642                                       void __iomem *mmio);
643 static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio);
644 static void mv_soc_65n_phy_errata(struct mv_host_priv *hpriv,
645                                   void __iomem *mmio, unsigned int port);
646 static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio);
647 static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio,
648                              unsigned int port_no);
649 static int mv_stop_edma(struct ata_port *ap);
650 static int mv_stop_edma_engine(void __iomem *port_mmio);
651 static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma);
652 
653 static void mv_pmp_select(struct ata_port *ap, int pmp);
654 static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class,
655                                 unsigned long deadline);
656 static int  mv_softreset(struct ata_link *link, unsigned int *class,
657                                 unsigned long deadline);
658 static void mv_pmp_error_handler(struct ata_port *ap);
659 static void mv_process_crpb_entries(struct ata_port *ap,
660                                         struct mv_port_priv *pp);
661 
662 static void mv_sff_irq_clear(struct ata_port *ap);
663 static int mv_check_atapi_dma(struct ata_queued_cmd *qc);
664 static void mv_bmdma_setup(struct ata_queued_cmd *qc);
665 static void mv_bmdma_start(struct ata_queued_cmd *qc);
666 static void mv_bmdma_stop(struct ata_queued_cmd *qc);
667 static u8   mv_bmdma_status(struct ata_port *ap);
668 static u8 mv_sff_check_status(struct ata_port *ap);
669 
670 /* .sg_tablesize is (MV_MAX_SG_CT / 2) in the structures below
671  * because we have to allow room for worst case splitting of
672  * PRDs for 64K boundaries in mv_fill_sg().
673  */
674 #ifdef CONFIG_PCI
675 static struct scsi_host_template mv5_sht = {
676         ATA_BASE_SHT(DRV_NAME),
677         .sg_tablesize           = MV_MAX_SG_CT / 2,
678         .dma_boundary           = MV_DMA_BOUNDARY,
679 };
680 #endif
681 static struct scsi_host_template mv6_sht = {
682         ATA_NCQ_SHT(DRV_NAME),
683         .can_queue              = MV_MAX_Q_DEPTH - 1,
684         .sg_tablesize           = MV_MAX_SG_CT / 2,
685         .dma_boundary           = MV_DMA_BOUNDARY,
686 };
687 
688 static struct ata_port_operations mv5_ops = {
689         .inherits               = &ata_sff_port_ops,
690 
691         .lost_interrupt         = ATA_OP_NULL,
692 
693         .qc_defer               = mv_qc_defer,
694         .qc_prep                = mv_qc_prep,
695         .qc_issue               = mv_qc_issue,
696 
697         .freeze                 = mv_eh_freeze,
698         .thaw                   = mv_eh_thaw,
699         .hardreset              = mv_hardreset,
700 
701         .scr_read               = mv5_scr_read,
702         .scr_write              = mv5_scr_write,
703 
704         .port_start             = mv_port_start,
705         .port_stop              = mv_port_stop,
706 };
707 
708 static struct ata_port_operations mv6_ops = {
709         .inherits               = &ata_bmdma_port_ops,
710 
711         .lost_interrupt         = ATA_OP_NULL,
712 
713         .qc_defer               = mv_qc_defer,
714         .qc_prep                = mv_qc_prep,
715         .qc_issue               = mv_qc_issue,
716 
717         .dev_config             = mv6_dev_config,
718 
719         .freeze                 = mv_eh_freeze,
720         .thaw                   = mv_eh_thaw,
721         .hardreset              = mv_hardreset,
722         .softreset              = mv_softreset,
723         .pmp_hardreset          = mv_pmp_hardreset,
724         .pmp_softreset          = mv_softreset,
725         .error_handler          = mv_pmp_error_handler,
726 
727         .scr_read               = mv_scr_read,
728         .scr_write              = mv_scr_write,
729 
730         .sff_check_status       = mv_sff_check_status,
731         .sff_irq_clear          = mv_sff_irq_clear,
732         .check_atapi_dma        = mv_check_atapi_dma,
733         .bmdma_setup            = mv_bmdma_setup,
734         .bmdma_start            = mv_bmdma_start,
735         .bmdma_stop             = mv_bmdma_stop,
736         .bmdma_status           = mv_bmdma_status,
737 
738         .port_start             = mv_port_start,
739         .port_stop              = mv_port_stop,
740 };
741 
742 static struct ata_port_operations mv_iie_ops = {
743         .inherits               = &mv6_ops,
744         .dev_config             = ATA_OP_NULL,
745         .qc_prep                = mv_qc_prep_iie,
746 };
747 
748 static const struct ata_port_info mv_port_info[] = {
749         {  /* chip_504x */
750                 .flags          = MV_GEN_I_FLAGS,
751                 .pio_mask       = ATA_PIO4,
752                 .udma_mask      = ATA_UDMA6,
753                 .port_ops       = &mv5_ops,
754         },
755         {  /* chip_508x */
756                 .flags          = MV_GEN_I_FLAGS | MV_FLAG_DUAL_HC,
757                 .pio_mask       = ATA_PIO4,
758                 .udma_mask      = ATA_UDMA6,
759                 .port_ops       = &mv5_ops,
760         },
761         {  /* chip_5080 */
762                 .flags          = MV_GEN_I_FLAGS | MV_FLAG_DUAL_HC,
763                 .pio_mask       = ATA_PIO4,
764                 .udma_mask      = ATA_UDMA6,
765                 .port_ops       = &mv5_ops,
766         },
767         {  /* chip_604x */
768                 .flags          = MV_GEN_II_FLAGS,
769                 .pio_mask       = ATA_PIO4,
770                 .udma_mask      = ATA_UDMA6,
771                 .port_ops       = &mv6_ops,
772         },
773         {  /* chip_608x */
774                 .flags          = MV_GEN_II_FLAGS | MV_FLAG_DUAL_HC,
775                 .pio_mask       = ATA_PIO4,
776                 .udma_mask      = ATA_UDMA6,
777                 .port_ops       = &mv6_ops,
778         },
779         {  /* chip_6042 */
780                 .flags          = MV_GEN_IIE_FLAGS,
781                 .pio_mask       = ATA_PIO4,
782                 .udma_mask      = ATA_UDMA6,
783                 .port_ops       = &mv_iie_ops,
784         },
785         {  /* chip_7042 */
786                 .flags          = MV_GEN_IIE_FLAGS,
787                 .pio_mask       = ATA_PIO4,
788                 .udma_mask      = ATA_UDMA6,
789                 .port_ops       = &mv_iie_ops,
790         },
791         {  /* chip_soc */
792                 .flags          = MV_GEN_IIE_FLAGS,
793                 .pio_mask       = ATA_PIO4,
794                 .udma_mask      = ATA_UDMA6,
795                 .port_ops       = &mv_iie_ops,
796         },
797 };
798 
799 static const struct pci_device_id mv_pci_tbl[] = {
800         { PCI_VDEVICE(MARVELL, 0x5040), chip_504x },
801         { PCI_VDEVICE(MARVELL, 0x5041), chip_504x },
802         { PCI_VDEVICE(MARVELL, 0x5080), chip_5080 },
803         { PCI_VDEVICE(MARVELL, 0x5081), chip_508x },
804         /* RocketRAID 1720/174x have different identifiers */
805         { PCI_VDEVICE(TTI, 0x1720), chip_6042 },
806         { PCI_VDEVICE(TTI, 0x1740), chip_6042 },
807         { PCI_VDEVICE(TTI, 0x1742), chip_6042 },
808 
809         { PCI_VDEVICE(MARVELL, 0x6040), chip_604x },
810         { PCI_VDEVICE(MARVELL, 0x6041), chip_604x },
811         { PCI_VDEVICE(MARVELL, 0x6042), chip_6042 },
812         { PCI_VDEVICE(MARVELL, 0x6080), chip_608x },
813         { PCI_VDEVICE(MARVELL, 0x6081), chip_608x },
814 
815         { PCI_VDEVICE(ADAPTEC2, 0x0241), chip_604x },
816 
817         /* Adaptec 1430SA */
818         { PCI_VDEVICE(ADAPTEC2, 0x0243), chip_7042 },
819 
820         /* Marvell 7042 support */
821         { PCI_VDEVICE(MARVELL, 0x7042), chip_7042 },
822 
823         /* Highpoint RocketRAID PCIe series */
824         { PCI_VDEVICE(TTI, 0x2300), chip_7042 },
825         { PCI_VDEVICE(TTI, 0x2310), chip_7042 },
826 
827         { }                     /* terminate list */
828 };
829 
830 static const struct mv_hw_ops mv5xxx_ops = {
831         .phy_errata             = mv5_phy_errata,
832         .enable_leds            = mv5_enable_leds,
833         .read_preamp            = mv5_read_preamp,
834         .reset_hc               = mv5_reset_hc,
835         .reset_flash            = mv5_reset_flash,
836         .reset_bus              = mv5_reset_bus,
837 };
838 
839 static const struct mv_hw_ops mv6xxx_ops = {
840         .phy_errata             = mv6_phy_errata,
841         .enable_leds            = mv6_enable_leds,
842         .read_preamp            = mv6_read_preamp,
843         .reset_hc               = mv6_reset_hc,
844         .reset_flash            = mv6_reset_flash,
845         .reset_bus              = mv_reset_pci_bus,
846 };
847 
848 static const struct mv_hw_ops mv_soc_ops = {
849         .phy_errata             = mv6_phy_errata,
850         .enable_leds            = mv_soc_enable_leds,
851         .read_preamp            = mv_soc_read_preamp,
852         .reset_hc               = mv_soc_reset_hc,
853         .reset_flash            = mv_soc_reset_flash,
854         .reset_bus              = mv_soc_reset_bus,
855 };
856 
857 static const struct mv_hw_ops mv_soc_65n_ops = {
858         .phy_errata             = mv_soc_65n_phy_errata,
859         .enable_leds            = mv_soc_enable_leds,
860         .reset_hc               = mv_soc_reset_hc,
861         .reset_flash            = mv_soc_reset_flash,
862         .reset_bus              = mv_soc_reset_bus,
863 };
864 
865 /*
866  * Functions
867  */
868 
869 static inline void writelfl(unsigned long data, void __iomem *addr)
870 {
871         writel(data, addr);
872         (void) readl(addr);     /* flush to avoid PCI posted write */
873 }
874 
875 static inline unsigned int mv_hc_from_port(unsigned int port)
876 {
877         return port >> MV_PORT_HC_SHIFT;
878 }
879 
880 static inline unsigned int mv_hardport_from_port(unsigned int port)
881 {
882         return port & MV_PORT_MASK;
883 }
884 
885 /*
886  * Consolidate some rather tricky bit shift calculations.
887  * This is hot-path stuff, so not a function.
888  * Simple code, with two return values, so macro rather than inline.
889  *
890  * port is the sole input, in range 0..7.
891  * shift is one output, for use with main_irq_cause / main_irq_mask registers.
892  * hardport is the other output, in range 0..3.
893  *
894  * Note that port and hardport may be the same variable in some cases.
895  */
896 #define MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport)    \
897 {                                                               \
898         shift    = mv_hc_from_port(port) * HC_SHIFT;            \
899         hardport = mv_hardport_from_port(port);                 \
900         shift   += hardport * 2;                                \
901 }
902 
903 static inline void __iomem *mv_hc_base(void __iomem *base, unsigned int hc)
904 {
905         return (base + SATAHC0_REG_BASE + (hc * MV_SATAHC_REG_SZ));
906 }
907 
908 static inline void __iomem *mv_hc_base_from_port(void __iomem *base,
909                                                  unsigned int port)
910 {
911         return mv_hc_base(base, mv_hc_from_port(port));
912 }
913 
914 static inline void __iomem *mv_port_base(void __iomem *base, unsigned int port)
915 {
916         return  mv_hc_base_from_port(base, port) +
917                 MV_SATAHC_ARBTR_REG_SZ +
918                 (mv_hardport_from_port(port) * MV_PORT_REG_SZ);
919 }
920 
921 static void __iomem *mv5_phy_base(void __iomem *mmio, unsigned int port)
922 {
923         void __iomem *hc_mmio = mv_hc_base_from_port(mmio, port);
924         unsigned long ofs = (mv_hardport_from_port(port) + 1) * 0x100UL;
925 
926         return hc_mmio + ofs;
927 }
928 
929 static inline void __iomem *mv_host_base(struct ata_host *host)
930 {
931         struct mv_host_priv *hpriv = host->private_data;
932         return hpriv->base;
933 }
934 
935 static inline void __iomem *mv_ap_base(struct ata_port *ap)
936 {
937         return mv_port_base(mv_host_base(ap->host), ap->port_no);
938 }
939 
940 static inline int mv_get_hc_count(unsigned long port_flags)
941 {
942         return ((port_flags & MV_FLAG_DUAL_HC) ? 2 : 1);
943 }
944 
945 /**
946  *      mv_save_cached_regs - (re-)initialize cached port registers
947  *      @ap: the port whose registers we are caching
948  *
949  *      Initialize the local cache of port registers,
950  *      so that reading them over and over again can
951  *      be avoided on the hotter paths of this driver.
952  *      This saves a few microseconds each time we switch
953  *      to/from EDMA mode to perform (eg.) a drive cache flush.
954  */
955 static void mv_save_cached_regs(struct ata_port *ap)
956 {
957         void __iomem *port_mmio = mv_ap_base(ap);
958         struct mv_port_priv *pp = ap->private_data;
959 
960         pp->cached.fiscfg = readl(port_mmio + FISCFG);
961         pp->cached.ltmode = readl(port_mmio + LTMODE);
962         pp->cached.haltcond = readl(port_mmio + EDMA_HALTCOND);
963         pp->cached.unknown_rsvd = readl(port_mmio + EDMA_UNKNOWN_RSVD);
964 }
965 
966 /**
967  *      mv_write_cached_reg - write to a cached port register
968  *      @addr: hardware address of the register
969  *      @old: pointer to cached value of the register
970  *      @new: new value for the register
971  *
972  *      Write a new value to a cached register,
973  *      but only if the value is different from before.
974  */
975 static inline void mv_write_cached_reg(void __iomem *addr, u32 *old, u32 new)
976 {
977         if (new != *old) {
978                 unsigned long laddr;
979                 *old = new;
980                 /*
981                  * Workaround for 88SX60x1-B2 FEr SATA#13:
982                  * Read-after-write is needed to prevent generating 64-bit
983                  * write cycles on the PCI bus for SATA interface registers
984                  * at offsets ending in 0x4 or 0xc.
985                  *
986                  * Looks like a lot of fuss, but it avoids an unnecessary
987                  * +1 usec read-after-write delay for unaffected registers.
988                  */
989                 laddr = (unsigned long)addr & 0xffff;
990                 if (laddr >= 0x300 && laddr <= 0x33c) {
991                         laddr &= 0x000f;
992                         if (laddr == 0x4 || laddr == 0xc) {
993                                 writelfl(new, addr); /* read after write */
994                                 return;
995                         }
996                 }
997                 writel(new, addr); /* unaffected by the errata */
998         }
999 }
1000 
1001 static void mv_set_edma_ptrs(void __iomem *port_mmio,
1002                              struct mv_host_priv *hpriv,
1003                              struct mv_port_priv *pp)
1004 {
1005         u32 index;
1006 
1007         /*
1008          * initialize request queue
1009          */
1010         pp->req_idx &= MV_MAX_Q_DEPTH_MASK;     /* paranoia */
1011         index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT;
1012 
1013         WARN_ON(pp->crqb_dma & 0x3ff);
1014         writel((pp->crqb_dma >> 16) >> 16, port_mmio + EDMA_REQ_Q_BASE_HI);
1015         writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | index,
1016                  port_mmio + EDMA_REQ_Q_IN_PTR);
1017         writelfl(index, port_mmio + EDMA_REQ_Q_OUT_PTR);
1018 
1019         /*
1020          * initialize response queue
1021          */
1022         pp->resp_idx &= MV_MAX_Q_DEPTH_MASK;    /* paranoia */
1023         index = pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT;
1024 
1025         WARN_ON(pp->crpb_dma & 0xff);
1026         writel((pp->crpb_dma >> 16) >> 16, port_mmio + EDMA_RSP_Q_BASE_HI);
1027         writelfl(index, port_mmio + EDMA_RSP_Q_IN_PTR);
1028         writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) | index,
1029                  port_mmio + EDMA_RSP_Q_OUT_PTR);
1030 }
1031 
1032 static void mv_write_main_irq_mask(u32 mask, struct mv_host_priv *hpriv)
1033 {
1034         /*
1035          * When writing to the main_irq_mask in hardware,
1036          * we must ensure exclusivity between the interrupt coalescing bits
1037          * and the corresponding individual port DONE_IRQ bits.
1038          *
1039          * Note that this register is really an "IRQ enable" register,
1040          * not an "IRQ mask" register as Marvell's naming might suggest.
1041          */
1042         if (mask & (ALL_PORTS_COAL_DONE | PORTS_0_3_COAL_DONE))
1043                 mask &= ~DONE_IRQ_0_3;
1044         if (mask & (ALL_PORTS_COAL_DONE | PORTS_4_7_COAL_DONE))
1045                 mask &= ~DONE_IRQ_4_7;
1046         writelfl(mask, hpriv->main_irq_mask_addr);
1047 }
1048 
1049 static void mv_set_main_irq_mask(struct ata_host *host,
1050                                  u32 disable_bits, u32 enable_bits)
1051 {
1052         struct mv_host_priv *hpriv = host->private_data;
1053         u32 old_mask, new_mask;
1054 
1055         old_mask = hpriv->main_irq_mask;
1056         new_mask = (old_mask & ~disable_bits) | enable_bits;
1057         if (new_mask != old_mask) {
1058                 hpriv->main_irq_mask = new_mask;
1059                 mv_write_main_irq_mask(new_mask, hpriv);
1060         }
1061 }
1062 
1063 static void mv_enable_port_irqs(struct ata_port *ap,
1064                                      unsigned int port_bits)
1065 {
1066         unsigned int shift, hardport, port = ap->port_no;
1067         u32 disable_bits, enable_bits;
1068 
1069         MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport);
1070 
1071         disable_bits = (DONE_IRQ | ERR_IRQ) << shift;
1072         enable_bits  = port_bits << shift;
1073         mv_set_main_irq_mask(ap->host, disable_bits, enable_bits);
1074 }
1075 
1076 static void mv_clear_and_enable_port_irqs(struct ata_port *ap,
1077                                           void __iomem *port_mmio,
1078                                           unsigned int port_irqs)
1079 {
1080         struct mv_host_priv *hpriv = ap->host->private_data;
1081         int hardport = mv_hardport_from_port(ap->port_no);
1082         void __iomem *hc_mmio = mv_hc_base_from_port(
1083                                 mv_host_base(ap->host), ap->port_no);
1084         u32 hc_irq_cause;
1085 
1086         /* clear EDMA event indicators, if any */
1087         writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE);
1088 
1089         /* clear pending irq events */
1090         hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport);
1091         writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE);
1092 
1093         /* clear FIS IRQ Cause */
1094         if (IS_GEN_IIE(hpriv))
1095                 writelfl(0, port_mmio + FIS_IRQ_CAUSE);
1096 
1097         mv_enable_port_irqs(ap, port_irqs);
1098 }
1099 
1100 static void mv_set_irq_coalescing(struct ata_host *host,
1101                                   unsigned int count, unsigned int usecs)
1102 {
1103         struct mv_host_priv *hpriv = host->private_data;
1104         void __iomem *mmio = hpriv->base, *hc_mmio;
1105         u32 coal_enable = 0;
1106         unsigned long flags;
1107         unsigned int clks, is_dual_hc = hpriv->n_ports > MV_PORTS_PER_HC;
1108         const u32 coal_disable = PORTS_0_3_COAL_DONE | PORTS_4_7_COAL_DONE |
1109                                                         ALL_PORTS_COAL_DONE;
1110 
1111         /* Disable IRQ coalescing if either threshold is zero */
1112         if (!usecs || !count) {
1113                 clks = count = 0;
1114         } else {
1115                 /* Respect maximum limits of the hardware */
1116                 clks = usecs * COAL_CLOCKS_PER_USEC;
1117                 if (clks > MAX_COAL_TIME_THRESHOLD)
1118                         clks = MAX_COAL_TIME_THRESHOLD;
1119                 if (count > MAX_COAL_IO_COUNT)
1120                         count = MAX_COAL_IO_COUNT;
1121         }
1122 
1123         spin_lock_irqsave(&host->lock, flags);
1124         mv_set_main_irq_mask(host, coal_disable, 0);
1125 
1126         if (is_dual_hc && !IS_GEN_I(hpriv)) {
1127                 /*
1128                  * GEN_II/GEN_IIE with dual host controllers:
1129                  * one set of global thresholds for the entire chip.
1130                  */
1131                 writel(clks,  mmio + IRQ_COAL_TIME_THRESHOLD);
1132                 writel(count, mmio + IRQ_COAL_IO_THRESHOLD);
1133                 /* clear leftover coal IRQ bit */
1134                 writel(~ALL_PORTS_COAL_IRQ, mmio + IRQ_COAL_CAUSE);
1135                 if (count)
1136                         coal_enable = ALL_PORTS_COAL_DONE;
1137                 clks = count = 0; /* force clearing of regular regs below */
1138         }
1139 
1140         /*
1141          * All chips: independent thresholds for each HC on the chip.
1142          */
1143         hc_mmio = mv_hc_base_from_port(mmio, 0);
1144         writel(clks,  hc_mmio + HC_IRQ_COAL_TIME_THRESHOLD);
1145         writel(count, hc_mmio + HC_IRQ_COAL_IO_THRESHOLD);
1146         writel(~HC_COAL_IRQ, hc_mmio + HC_IRQ_CAUSE);
1147         if (count)
1148                 coal_enable |= PORTS_0_3_COAL_DONE;
1149         if (is_dual_hc) {
1150                 hc_mmio = mv_hc_base_from_port(mmio, MV_PORTS_PER_HC);
1151                 writel(clks,  hc_mmio + HC_IRQ_COAL_TIME_THRESHOLD);
1152                 writel(count, hc_mmio + HC_IRQ_COAL_IO_THRESHOLD);
1153                 writel(~HC_COAL_IRQ, hc_mmio + HC_IRQ_CAUSE);
1154                 if (count)
1155                         coal_enable |= PORTS_4_7_COAL_DONE;
1156         }
1157 
1158         mv_set_main_irq_mask(host, 0, coal_enable);
1159         spin_unlock_irqrestore(&host->lock, flags);
1160 }
1161 
1162 /**
1163  *      mv_start_edma - Enable eDMA engine
1164  *      @base: port base address
1165  *      @pp: port private data
1166  *
1167  *      Verify the local cache of the eDMA state is accurate with a
1168  *      WARN_ON.
1169  *
1170  *      LOCKING:
1171  *      Inherited from caller.
1172  */
1173 static void mv_start_edma(struct ata_port *ap, void __iomem *port_mmio,
1174                          struct mv_port_priv *pp, u8 protocol)
1175 {
1176         int want_ncq = (protocol == ATA_PROT_NCQ);
1177 
1178         if (pp->pp_flags & MV_PP_FLAG_EDMA_EN) {
1179                 int using_ncq = ((pp->pp_flags & MV_PP_FLAG_NCQ_EN) != 0);
1180                 if (want_ncq != using_ncq)
1181                         mv_stop_edma(ap);
1182         }
1183         if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN)) {
1184                 struct mv_host_priv *hpriv = ap->host->private_data;
1185 
1186                 mv_edma_cfg(ap, want_ncq, 1);
1187 
1188                 mv_set_edma_ptrs(port_mmio, hpriv, pp);
1189                 mv_clear_and_enable_port_irqs(ap, port_mmio, DONE_IRQ|ERR_IRQ);
1190 
1191                 writelfl(EDMA_EN, port_mmio + EDMA_CMD);
1192                 pp->pp_flags |= MV_PP_FLAG_EDMA_EN;
1193         }
1194 }
1195 
1196 static void mv_wait_for_edma_empty_idle(struct ata_port *ap)
1197 {
1198         void __iomem *port_mmio = mv_ap_base(ap);
1199         const u32 empty_idle = (EDMA_STATUS_CACHE_EMPTY | EDMA_STATUS_IDLE);
1200         const int per_loop = 5, timeout = (15 * 1000 / per_loop);
1201         int i;
1202 
1203         /*
1204          * Wait for the EDMA engine to finish transactions in progress.
1205          * No idea what a good "timeout" value might be, but measurements
1206          * indicate that it often requires hundreds of microseconds
1207          * with two drives in-use.  So we use the 15msec value above
1208          * as a rough guess at what even more drives might require.
1209          */
1210         for (i = 0; i < timeout; ++i) {
1211                 u32 edma_stat = readl(port_mmio + EDMA_STATUS);
1212                 if ((edma_stat & empty_idle) == empty_idle)
1213                         break;
1214                 udelay(per_loop);
1215         }
1216         /* ata_port_info(ap, "%s: %u+ usecs\n", __func__, i); */
1217 }
1218 
1219 /**
1220  *      mv_stop_edma_engine - Disable eDMA engine
1221  *      @port_mmio: io base address
1222  *
1223  *      LOCKING:
1224  *      Inherited from caller.
1225  */
1226 static int mv_stop_edma_engine(void __iomem *port_mmio)
1227 {
1228         int i;
1229 
1230         /* Disable eDMA.  The disable bit auto clears. */
1231         writelfl(EDMA_DS, port_mmio + EDMA_CMD);
1232 
1233         /* Wait for the chip to confirm eDMA is off. */
1234         for (i = 10000; i > 0; i--) {
1235                 u32 reg = readl(port_mmio + EDMA_CMD);
1236                 if (!(reg & EDMA_EN))
1237                         return 0;
1238                 udelay(10);
1239         }
1240         return -EIO;
1241 }
1242 
1243 static int mv_stop_edma(struct ata_port *ap)
1244 {
1245         void __iomem *port_mmio = mv_ap_base(ap);
1246         struct mv_port_priv *pp = ap->private_data;
1247         int err = 0;
1248 
1249         if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN))
1250                 return 0;
1251         pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
1252         mv_wait_for_edma_empty_idle(ap);
1253         if (mv_stop_edma_engine(port_mmio)) {
1254                 ata_port_err(ap, "Unable to stop eDMA\n");
1255                 err = -EIO;
1256         }
1257         mv_edma_cfg(ap, 0, 0);
1258         return err;
1259 }
1260 
1261 #ifdef ATA_DEBUG
1262 static void mv_dump_mem(void __iomem *start, unsigned bytes)
1263 {
1264         int b, w;
1265         for (b = 0; b < bytes; ) {
1266                 DPRINTK("%p: ", start + b);
1267                 for (w = 0; b < bytes && w < 4; w++) {
1268                         printk("%08x ", readl(start + b));
1269                         b += sizeof(u32);
1270                 }
1271                 printk("\n");
1272         }
1273 }
1274 #endif
1275 #if defined(ATA_DEBUG) || defined(CONFIG_PCI)
1276 static void mv_dump_pci_cfg(struct pci_dev *pdev, unsigned bytes)
1277 {
1278 #ifdef ATA_DEBUG
1279         int b, w;
1280         u32 dw;
1281         for (b = 0; b < bytes; ) {
1282                 DPRINTK("%02x: ", b);
1283                 for (w = 0; b < bytes && w < 4; w++) {
1284                         (void) pci_read_config_dword(pdev, b, &dw);
1285                         printk("%08x ", dw);
1286                         b += sizeof(u32);
1287                 }
1288                 printk("\n");
1289         }
1290 #endif
1291 }
1292 #endif
1293 static void mv_dump_all_regs(void __iomem *mmio_base, int port,
1294                              struct pci_dev *pdev)
1295 {
1296 #ifdef ATA_DEBUG
1297         void __iomem *hc_base = mv_hc_base(mmio_base,
1298                                            port >> MV_PORT_HC_SHIFT);
1299         void __iomem *port_base;
1300         int start_port, num_ports, p, start_hc, num_hcs, hc;
1301 
1302         if (0 > port) {
1303                 start_hc = start_port = 0;
1304                 num_ports = 8;          /* shld be benign for 4 port devs */
1305                 num_hcs = 2;
1306         } else {
1307                 start_hc = port >> MV_PORT_HC_SHIFT;
1308                 start_port = port;
1309                 num_ports = num_hcs = 1;
1310         }
1311         DPRINTK("All registers for port(s) %u-%u:\n", start_port,
1312                 num_ports > 1 ? num_ports - 1 : start_port);
1313 
1314         if (NULL != pdev) {
1315                 DPRINTK("PCI config space regs:\n");
1316                 mv_dump_pci_cfg(pdev, 0x68);
1317         }
1318         DPRINTK("PCI regs:\n");
1319         mv_dump_mem(mmio_base+0xc00, 0x3c);
1320         mv_dump_mem(mmio_base+0xd00, 0x34);
1321         mv_dump_mem(mmio_base+0xf00, 0x4);
1322         mv_dump_mem(mmio_base+0x1d00, 0x6c);
1323         for (hc = start_hc; hc < start_hc + num_hcs; hc++) {
1324                 hc_base = mv_hc_base(mmio_base, hc);
1325                 DPRINTK("HC regs (HC %i):\n", hc);
1326                 mv_dump_mem(hc_base, 0x1c);
1327         }
1328         for (p = start_port; p < start_port + num_ports; p++) {
1329                 port_base = mv_port_base(mmio_base, p);
1330                 DPRINTK("EDMA regs (port %i):\n", p);
1331                 mv_dump_mem(port_base, 0x54);
1332                 DPRINTK("SATA regs (port %i):\n", p);
1333                 mv_dump_mem(port_base+0x300, 0x60);
1334         }
1335 #endif
1336 }
1337 
1338 static unsigned int mv_scr_offset(unsigned int sc_reg_in)
1339 {
1340         unsigned int ofs;
1341 
1342         switch (sc_reg_in) {
1343         case SCR_STATUS:
1344         case SCR_CONTROL:
1345         case SCR_ERROR:
1346                 ofs = SATA_STATUS + (sc_reg_in * sizeof(u32));
1347                 break;
1348         case SCR_ACTIVE:
1349                 ofs = SATA_ACTIVE;   /* active is not with the others */
1350                 break;
1351         default:
1352                 ofs = 0xffffffffU;
1353                 break;
1354         }
1355         return ofs;
1356 }
1357 
1358 static int mv_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val)
1359 {
1360         unsigned int ofs = mv_scr_offset(sc_reg_in);
1361 
1362         if (ofs != 0xffffffffU) {
1363                 *val = readl(mv_ap_base(link->ap) + ofs);
1364                 return 0;
1365         } else
1366                 return -EINVAL;
1367 }
1368 
1369 static int mv_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val)
1370 {
1371         unsigned int ofs = mv_scr_offset(sc_reg_in);
1372 
1373         if (ofs != 0xffffffffU) {
1374                 void __iomem *addr = mv_ap_base(link->ap) + ofs;
1375                 struct mv_host_priv *hpriv = link->ap->host->private_data;
1376                 if (sc_reg_in == SCR_CONTROL) {
1377                         /*
1378                          * Workaround for 88SX60x1 FEr SATA#26:
1379                          *
1380                          * COMRESETs have to take care not to accidentally
1381                          * put the drive to sleep when writing SCR_CONTROL.
1382                          * Setting bits 12..15 prevents this problem.
1383                          *
1384                          * So if we see an outbound COMMRESET, set those bits.
1385                          * Ditto for the followup write that clears the reset.
1386                          *
1387                          * The proprietary driver does this for
1388                          * all chip versions, and so do we.
1389                          */
1390                         if ((val & 0xf) == 1 || (readl(addr) & 0xf) == 1)
1391                                 val |= 0xf000;
1392 
1393                         if (hpriv->hp_flags & MV_HP_FIX_LP_PHY_CTL) {
1394                                 void __iomem *lp_phy_addr =
1395                                         mv_ap_base(link->ap) + LP_PHY_CTL;
1396                                 /*
1397                                  * Set PHY speed according to SControl speed.
1398                                  */
1399                                 u32 lp_phy_val =
1400                                         LP_PHY_CTL_PIN_PU_PLL |
1401                                         LP_PHY_CTL_PIN_PU_RX  |
1402                                         LP_PHY_CTL_PIN_PU_TX;
1403 
1404                                 if ((val & 0xf0) != 0x10)
1405                                         lp_phy_val |=
1406                                                 LP_PHY_CTL_GEN_TX_3G |
1407                                                 LP_PHY_CTL_GEN_RX_3G;
1408 
1409                                 writelfl(lp_phy_val, lp_phy_addr);
1410                         }
1411                 }
1412                 writelfl(val, addr);
1413                 return 0;
1414         } else
1415                 return -EINVAL;
1416 }
1417 
1418 static void mv6_dev_config(struct ata_device *adev)
1419 {
1420         /*
1421          * Deal with Gen-II ("mv6") hardware quirks/restrictions:
1422          *
1423          * Gen-II does not support NCQ over a port multiplier
1424          *  (no FIS-based switching).
1425          */
1426         if (adev->flags & ATA_DFLAG_NCQ) {
1427                 if (sata_pmp_attached(adev->link->ap)) {
1428                         adev->flags &= ~ATA_DFLAG_NCQ;
1429                         ata_dev_info(adev,
1430                                 "NCQ disabled for command-based switching\n");
1431                 }
1432         }
1433 }
1434 
1435 static int mv_qc_defer(struct ata_queued_cmd *qc)
1436 {
1437         struct ata_link *link = qc->dev->link;
1438         struct ata_port *ap = link->ap;
1439         struct mv_port_priv *pp = ap->private_data;
1440 
1441         /*
1442          * Don't allow new commands if we're in a delayed EH state
1443          * for NCQ and/or FIS-based switching.
1444          */
1445         if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH)
1446                 return ATA_DEFER_PORT;
1447 
1448         /* PIO commands need exclusive link: no other commands [DMA or PIO]
1449          * can run concurrently.
1450          * set excl_link when we want to send a PIO command in DMA mode
1451          * or a non-NCQ command in NCQ mode.
1452          * When we receive a command from that link, and there are no
1453          * outstanding commands, mark a flag to clear excl_link and let
1454          * the command go through.
1455          */
1456         if (unlikely(ap->excl_link)) {
1457                 if (link == ap->excl_link) {
1458                         if (ap->nr_active_links)
1459                                 return ATA_DEFER_PORT;
1460                         qc->flags |= ATA_QCFLAG_CLEAR_EXCL;
1461                         return 0;
1462                 } else
1463                         return ATA_DEFER_PORT;
1464         }
1465 
1466         /*
1467          * If the port is completely idle, then allow the new qc.
1468          */
1469         if (ap->nr_active_links == 0)
1470                 return 0;
1471 
1472         /*
1473          * The port is operating in host queuing mode (EDMA) with NCQ
1474          * enabled, allow multiple NCQ commands.  EDMA also allows
1475          * queueing multiple DMA commands but libata core currently
1476          * doesn't allow it.
1477          */
1478         if ((pp->pp_flags & MV_PP_FLAG_EDMA_EN) &&
1479             (pp->pp_flags & MV_PP_FLAG_NCQ_EN)) {
1480                 if (ata_is_ncq(qc->tf.protocol))
1481                         return 0;
1482                 else {
1483                         ap->excl_link = link;
1484                         return ATA_DEFER_PORT;
1485                 }
1486         }
1487 
1488         return ATA_DEFER_PORT;
1489 }
1490 
1491 static void mv_config_fbs(struct ata_port *ap, int want_ncq, int want_fbs)
1492 {
1493         struct mv_port_priv *pp = ap->private_data;
1494         void __iomem *port_mmio;
1495 
1496         u32 fiscfg,   *old_fiscfg   = &pp->cached.fiscfg;
1497         u32 ltmode,   *old_ltmode   = &pp->cached.ltmode;
1498         u32 haltcond, *old_haltcond = &pp->cached.haltcond;
1499 
1500         ltmode   = *old_ltmode & ~LTMODE_BIT8;
1501         haltcond = *old_haltcond | EDMA_ERR_DEV;
1502 
1503         if (want_fbs) {
1504                 fiscfg = *old_fiscfg | FISCFG_SINGLE_SYNC;
1505                 ltmode = *old_ltmode | LTMODE_BIT8;
1506                 if (want_ncq)
1507                         haltcond &= ~EDMA_ERR_DEV;
1508                 else
1509                         fiscfg |=  FISCFG_WAIT_DEV_ERR;
1510         } else {
1511                 fiscfg = *old_fiscfg & ~(FISCFG_SINGLE_SYNC | FISCFG_WAIT_DEV_ERR);
1512         }
1513 
1514         port_mmio = mv_ap_base(ap);
1515         mv_write_cached_reg(port_mmio + FISCFG, old_fiscfg, fiscfg);
1516         mv_write_cached_reg(port_mmio + LTMODE, old_ltmode, ltmode);
1517         mv_write_cached_reg(port_mmio + EDMA_HALTCOND, old_haltcond, haltcond);
1518 }
1519 
1520 static void mv_60x1_errata_sata25(struct ata_port *ap, int want_ncq)
1521 {
1522         struct mv_host_priv *hpriv = ap->host->private_data;
1523         u32 old, new;
1524 
1525         /* workaround for 88SX60x1 FEr SATA#25 (part 1) */
1526         old = readl(hpriv->base + GPIO_PORT_CTL);
1527         if (want_ncq)
1528                 new = old | (1 << 22);
1529         else
1530                 new = old & ~(1 << 22);
1531         if (new != old)
1532                 writel(new, hpriv->base + GPIO_PORT_CTL);
1533 }
1534 
1535 /**
1536  *      mv_bmdma_enable - set a magic bit on GEN_IIE to allow bmdma
1537  *      @ap: Port being initialized
1538  *
1539  *      There are two DMA modes on these chips:  basic DMA, and EDMA.
1540  *
1541  *      Bit-0 of the "EDMA RESERVED" register enables/disables use
1542  *      of basic DMA on the GEN_IIE versions of the chips.
1543  *
1544  *      This bit survives EDMA resets, and must be set for basic DMA
1545  *      to function, and should be cleared when EDMA is active.
1546  */
1547 static void mv_bmdma_enable_iie(struct ata_port *ap, int enable_bmdma)
1548 {
1549         struct mv_port_priv *pp = ap->private_data;
1550         u32 new, *old = &pp->cached.unknown_rsvd;
1551 
1552         if (enable_bmdma)
1553                 new = *old | 1;
1554         else
1555                 new = *old & ~1;
1556         mv_write_cached_reg(mv_ap_base(ap) + EDMA_UNKNOWN_RSVD, old, new);
1557 }
1558 
1559 /*
1560  * SOC chips have an issue whereby the HDD LEDs don't always blink
1561  * during I/O when NCQ is enabled. Enabling a special "LED blink" mode
1562  * of the SOC takes care of it, generating a steady blink rate when
1563  * any drive on the chip is active.
1564  *
1565  * Unfortunately, the blink mode is a global hardware setting for the SOC,
1566  * so we must use it whenever at least one port on the SOC has NCQ enabled.
1567  *
1568  * We turn "LED blink" off when NCQ is not in use anywhere, because the normal
1569  * LED operation works then, and provides better (more accurate) feedback.
1570  *
1571  * Note that this code assumes that an SOC never has more than one HC onboard.
1572  */
1573 static void mv_soc_led_blink_enable(struct ata_port *ap)
1574 {
1575         struct ata_host *host = ap->host;
1576         struct mv_host_priv *hpriv = host->private_data;
1577         void __iomem *hc_mmio;
1578         u32 led_ctrl;
1579 
1580         if (hpriv->hp_flags & MV_HP_QUIRK_LED_BLINK_EN)
1581                 return;
1582         hpriv->hp_flags |= MV_HP_QUIRK_LED_BLINK_EN;
1583         hc_mmio = mv_hc_base_from_port(mv_host_base(host), ap->port_no);
1584         led_ctrl = readl(hc_mmio + SOC_LED_CTRL);
1585         writel(led_ctrl | SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL);
1586 }
1587 
1588 static void mv_soc_led_blink_disable(struct ata_port *ap)
1589 {
1590         struct ata_host *host = ap->host;
1591         struct mv_host_priv *hpriv = host->private_data;
1592         void __iomem *hc_mmio;
1593         u32 led_ctrl;
1594         unsigned int port;
1595 
1596         if (!(hpriv->hp_flags & MV_HP_QUIRK_LED_BLINK_EN))
1597                 return;
1598 
1599         /* disable led-blink only if no ports are using NCQ */
1600         for (port = 0; port < hpriv->n_ports; port++) {
1601                 struct ata_port *this_ap = host->ports[port];
1602                 struct mv_port_priv *pp = this_ap->private_data;
1603 
1604                 if (pp->pp_flags & MV_PP_FLAG_NCQ_EN)
1605                         return;
1606         }
1607 
1608         hpriv->hp_flags &= ~MV_HP_QUIRK_LED_BLINK_EN;
1609         hc_mmio = mv_hc_base_from_port(mv_host_base(host), ap->port_no);
1610         led_ctrl = readl(hc_mmio + SOC_LED_CTRL);
1611         writel(led_ctrl & ~SOC_LED_CTRL_BLINK, hc_mmio + SOC_LED_CTRL);
1612 }
1613 
1614 static void mv_edma_cfg(struct ata_port *ap, int want_ncq, int want_edma)
1615 {
1616         u32 cfg;
1617         struct mv_port_priv *pp    = ap->private_data;
1618         struct mv_host_priv *hpriv = ap->host->private_data;
1619         void __iomem *port_mmio    = mv_ap_base(ap);
1620 
1621         /* set up non-NCQ EDMA configuration */
1622         cfg = EDMA_CFG_Q_DEPTH;         /* always 0x1f for *all* chips */
1623         pp->pp_flags &=
1624           ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN | MV_PP_FLAG_FAKE_ATA_BUSY);
1625 
1626         if (IS_GEN_I(hpriv))
1627                 cfg |= (1 << 8);        /* enab config burst size mask */
1628 
1629         else if (IS_GEN_II(hpriv)) {
1630                 cfg |= EDMA_CFG_RD_BRST_EXT | EDMA_CFG_WR_BUFF_LEN;
1631                 mv_60x1_errata_sata25(ap, want_ncq);
1632 
1633         } else if (IS_GEN_IIE(hpriv)) {
1634                 int want_fbs = sata_pmp_attached(ap);
1635                 /*
1636                  * Possible future enhancement:
1637                  *
1638                  * The chip can use FBS with non-NCQ, if we allow it,
1639                  * But first we need to have the error handling in place
1640                  * for this mode (datasheet section 7.3.15.4.2.3).
1641                  * So disallow non-NCQ FBS for now.
1642                  */
1643                 want_fbs &= want_ncq;
1644 
1645                 mv_config_fbs(ap, want_ncq, want_fbs);
1646 
1647                 if (want_fbs) {
1648                         pp->pp_flags |= MV_PP_FLAG_FBS_EN;
1649                         cfg |= EDMA_CFG_EDMA_FBS; /* FIS-based switching */
1650                 }
1651 
1652                 cfg |= (1 << 23);       /* do not mask PM field in rx'd FIS */
1653                 if (want_edma) {
1654                         cfg |= (1 << 22); /* enab 4-entry host queue cache */
1655                         if (!IS_SOC(hpriv))
1656                                 cfg |= (1 << 18); /* enab early completion */
1657                 }
1658                 if (hpriv->hp_flags & MV_HP_CUT_THROUGH)
1659                         cfg |= (1 << 17); /* enab cut-thru (dis stor&forwrd) */
1660                 mv_bmdma_enable_iie(ap, !want_edma);
1661 
1662                 if (IS_SOC(hpriv)) {
1663                         if (want_ncq)
1664                                 mv_soc_led_blink_enable(ap);
1665                         else
1666                                 mv_soc_led_blink_disable(ap);
1667                 }
1668         }
1669 
1670         if (want_ncq) {
1671                 cfg |= EDMA_CFG_NCQ;
1672                 pp->pp_flags |=  MV_PP_FLAG_NCQ_EN;
1673         }
1674 
1675         writelfl(cfg, port_mmio + EDMA_CFG);
1676 }
1677 
1678 static void mv_port_free_dma_mem(struct ata_port *ap)
1679 {
1680         struct mv_host_priv *hpriv = ap->host->private_data;
1681         struct mv_port_priv *pp = ap->private_data;
1682         int tag;
1683 
1684         if (pp->crqb) {
1685                 dma_pool_free(hpriv->crqb_pool, pp->crqb, pp->crqb_dma);
1686                 pp->crqb = NULL;
1687         }
1688         if (pp->crpb) {
1689                 dma_pool_free(hpriv->crpb_pool, pp->crpb, pp->crpb_dma);
1690                 pp->crpb = NULL;
1691         }
1692         /*
1693          * For GEN_I, there's no NCQ, so we have only a single sg_tbl.
1694          * For later hardware, we have one unique sg_tbl per NCQ tag.
1695          */
1696         for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) {
1697                 if (pp->sg_tbl[tag]) {
1698                         if (tag == 0 || !IS_GEN_I(hpriv))
1699                                 dma_pool_free(hpriv->sg_tbl_pool,
1700                                               pp->sg_tbl[tag],
1701                                               pp->sg_tbl_dma[tag]);
1702                         pp->sg_tbl[tag] = NULL;
1703                 }
1704         }
1705 }
1706 
1707 /**
1708  *      mv_port_start - Port specific init/start routine.
1709  *      @ap: ATA channel to manipulate
1710  *
1711  *      Allocate and point to DMA memory, init port private memory,
1712  *      zero indices.
1713  *
1714  *      LOCKING:
1715  *      Inherited from caller.
1716  */
1717 static int mv_port_start(struct ata_port *ap)
1718 {
1719         struct device *dev = ap->host->dev;
1720         struct mv_host_priv *hpriv = ap->host->private_data;
1721         struct mv_port_priv *pp;
1722         unsigned long flags;
1723         int tag;
1724 
1725         pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1726         if (!pp)
1727                 return -ENOMEM;
1728         ap->private_data = pp;
1729 
1730         pp->crqb = dma_pool_zalloc(hpriv->crqb_pool, GFP_KERNEL, &pp->crqb_dma);
1731         if (!pp->crqb)
1732                 return -ENOMEM;
1733 
1734         pp->crpb = dma_pool_zalloc(hpriv->crpb_pool, GFP_KERNEL, &pp->crpb_dma);
1735         if (!pp->crpb)
1736                 goto out_port_free_dma_mem;
1737 
1738         /* 6041/6081 Rev. "C0" (and newer) are okay with async notify */
1739         if (hpriv->hp_flags & MV_HP_ERRATA_60X1C0)
1740                 ap->flags |= ATA_FLAG_AN;
1741         /*
1742          * For GEN_I, there's no NCQ, so we only allocate a single sg_tbl.
1743          * For later hardware, we need one unique sg_tbl per NCQ tag.
1744          */
1745         for (tag = 0; tag < MV_MAX_Q_DEPTH; ++tag) {
1746                 if (tag == 0 || !IS_GEN_I(hpriv)) {
1747                         pp->sg_tbl[tag] = dma_pool_alloc(hpriv->sg_tbl_pool,
1748                                               GFP_KERNEL, &pp->sg_tbl_dma[tag]);
1749                         if (!pp->sg_tbl[tag])
1750                                 goto out_port_free_dma_mem;
1751                 } else {
1752                         pp->sg_tbl[tag]     = pp->sg_tbl[0];
1753                         pp->sg_tbl_dma[tag] = pp->sg_tbl_dma[0];
1754                 }
1755         }
1756 
1757         spin_lock_irqsave(ap->lock, flags);
1758         mv_save_cached_regs(ap);
1759         mv_edma_cfg(ap, 0, 0);
1760         spin_unlock_irqrestore(ap->lock, flags);
1761 
1762         return 0;
1763 
1764 out_port_free_dma_mem:
1765         mv_port_free_dma_mem(ap);
1766         return -ENOMEM;
1767 }
1768 
1769 /**
1770  *      mv_port_stop - Port specific cleanup/stop routine.
1771  *      @ap: ATA channel to manipulate
1772  *
1773  *      Stop DMA, cleanup port memory.
1774  *
1775  *      LOCKING:
1776  *      This routine uses the host lock to protect the DMA stop.
1777  */
1778 static void mv_port_stop(struct ata_port *ap)
1779 {
1780         unsigned long flags;
1781 
1782         spin_lock_irqsave(ap->lock, flags);
1783         mv_stop_edma(ap);
1784         mv_enable_port_irqs(ap, 0);
1785         spin_unlock_irqrestore(ap->lock, flags);
1786         mv_port_free_dma_mem(ap);
1787 }
1788 
1789 /**
1790  *      mv_fill_sg - Fill out the Marvell ePRD (scatter gather) entries
1791  *      @qc: queued command whose SG list to source from
1792  *
1793  *      Populate the SG list and mark the last entry.
1794  *
1795  *      LOCKING:
1796  *      Inherited from caller.
1797  */
1798 static void mv_fill_sg(struct ata_queued_cmd *qc)
1799 {
1800         struct mv_port_priv *pp = qc->ap->private_data;
1801         struct scatterlist *sg;
1802         struct mv_sg *mv_sg, *last_sg = NULL;
1803         unsigned int si;
1804 
1805         mv_sg = pp->sg_tbl[qc->tag];
1806         for_each_sg(qc->sg, sg, qc->n_elem, si) {
1807                 dma_addr_t addr = sg_dma_address(sg);
1808                 u32 sg_len = sg_dma_len(sg);
1809 
1810                 while (sg_len) {
1811                         u32 offset = addr & 0xffff;
1812                         u32 len = sg_len;
1813 
1814                         if (offset + len > 0x10000)
1815                                 len = 0x10000 - offset;
1816 
1817                         mv_sg->addr = cpu_to_le32(addr & 0xffffffff);
1818                         mv_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1819                         mv_sg->flags_size = cpu_to_le32(len & 0xffff);
1820                         mv_sg->reserved = 0;
1821 
1822                         sg_len -= len;
1823                         addr += len;
1824 
1825                         last_sg = mv_sg;
1826                         mv_sg++;
1827                 }
1828         }
1829 
1830         if (likely(last_sg))
1831                 last_sg->flags_size |= cpu_to_le32(EPRD_FLAG_END_OF_TBL);
1832         mb(); /* ensure data structure is visible to the chipset */
1833 }
1834 
1835 static void mv_crqb_pack_cmd(__le16 *cmdw, u8 data, u8 addr, unsigned last)
1836 {
1837         u16 tmp = data | (addr << CRQB_CMD_ADDR_SHIFT) | CRQB_CMD_CS |
1838                 (last ? CRQB_CMD_LAST : 0);
1839         *cmdw = cpu_to_le16(tmp);
1840 }
1841 
1842 /**
1843  *      mv_sff_irq_clear - Clear hardware interrupt after DMA.
1844  *      @ap: Port associated with this ATA transaction.
1845  *
1846  *      We need this only for ATAPI bmdma transactions,
1847  *      as otherwise we experience spurious interrupts
1848  *      after libata-sff handles the bmdma interrupts.
1849  */
1850 static void mv_sff_irq_clear(struct ata_port *ap)
1851 {
1852         mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), ERR_IRQ);
1853 }
1854 
1855 /**
1856  *      mv_check_atapi_dma - Filter ATAPI cmds which are unsuitable for DMA.
1857  *      @qc: queued command to check for chipset/DMA compatibility.
1858  *
1859  *      The bmdma engines cannot handle speculative data sizes
1860  *      (bytecount under/over flow).  So only allow DMA for
1861  *      data transfer commands with known data sizes.
1862  *
1863  *      LOCKING:
1864  *      Inherited from caller.
1865  */
1866 static int mv_check_atapi_dma(struct ata_queued_cmd *qc)
1867 {
1868         struct scsi_cmnd *scmd = qc->scsicmd;
1869 
1870         if (scmd) {
1871                 switch (scmd->cmnd[0]) {
1872                 case READ_6:
1873                 case READ_10:
1874                 case READ_12:
1875                 case WRITE_6:
1876                 case WRITE_10:
1877                 case WRITE_12:
1878                 case GPCMD_READ_CD:
1879                 case GPCMD_SEND_DVD_STRUCTURE:
1880                 case GPCMD_SEND_CUE_SHEET:
1881                         return 0; /* DMA is safe */
1882                 }
1883         }
1884         return -EOPNOTSUPP; /* use PIO instead */
1885 }
1886 
1887 /**
1888  *      mv_bmdma_setup - Set up BMDMA transaction
1889  *      @qc: queued command to prepare DMA for.
1890  *
1891  *      LOCKING:
1892  *      Inherited from caller.
1893  */
1894 static void mv_bmdma_setup(struct ata_queued_cmd *qc)
1895 {
1896         struct ata_port *ap = qc->ap;
1897         void __iomem *port_mmio = mv_ap_base(ap);
1898         struct mv_port_priv *pp = ap->private_data;
1899 
1900         mv_fill_sg(qc);
1901 
1902         /* clear all DMA cmd bits */
1903         writel(0, port_mmio + BMDMA_CMD);
1904 
1905         /* load PRD table addr. */
1906         writel((pp->sg_tbl_dma[qc->tag] >> 16) >> 16,
1907                 port_mmio + BMDMA_PRD_HIGH);
1908         writelfl(pp->sg_tbl_dma[qc->tag],
1909                 port_mmio + BMDMA_PRD_LOW);
1910 
1911         /* issue r/w command */
1912         ap->ops->sff_exec_command(ap, &qc->tf);
1913 }
1914 
1915 /**
1916  *      mv_bmdma_start - Start a BMDMA transaction
1917  *      @qc: queued command to start DMA on.
1918  *
1919  *      LOCKING:
1920  *      Inherited from caller.
1921  */
1922 static void mv_bmdma_start(struct ata_queued_cmd *qc)
1923 {
1924         struct ata_port *ap = qc->ap;
1925         void __iomem *port_mmio = mv_ap_base(ap);
1926         unsigned int rw = (qc->tf.flags & ATA_TFLAG_WRITE);
1927         u32 cmd = (rw ? 0 : ATA_DMA_WR) | ATA_DMA_START;
1928 
1929         /* start host DMA transaction */
1930         writelfl(cmd, port_mmio + BMDMA_CMD);
1931 }
1932 
1933 /**
1934  *      mv_bmdma_stop - Stop BMDMA transfer
1935  *      @qc: queued command to stop DMA on.
1936  *
1937  *      Clears the ATA_DMA_START flag in the bmdma control register
1938  *
1939  *      LOCKING:
1940  *      Inherited from caller.
1941  */
1942 static void mv_bmdma_stop_ap(struct ata_port *ap)
1943 {
1944         void __iomem *port_mmio = mv_ap_base(ap);
1945         u32 cmd;
1946 
1947         /* clear start/stop bit */
1948         cmd = readl(port_mmio + BMDMA_CMD);
1949         if (cmd & ATA_DMA_START) {
1950                 cmd &= ~ATA_DMA_START;
1951                 writelfl(cmd, port_mmio + BMDMA_CMD);
1952 
1953                 /* one-PIO-cycle guaranteed wait, per spec, for HDMA1:0 transition */
1954                 ata_sff_dma_pause(ap);
1955         }
1956 }
1957 
1958 static void mv_bmdma_stop(struct ata_queued_cmd *qc)
1959 {
1960         mv_bmdma_stop_ap(qc->ap);
1961 }
1962 
1963 /**
1964  *      mv_bmdma_status - Read BMDMA status
1965  *      @ap: port for which to retrieve DMA status.
1966  *
1967  *      Read and return equivalent of the sff BMDMA status register.
1968  *
1969  *      LOCKING:
1970  *      Inherited from caller.
1971  */
1972 static u8 mv_bmdma_status(struct ata_port *ap)
1973 {
1974         void __iomem *port_mmio = mv_ap_base(ap);
1975         u32 reg, status;
1976 
1977         /*
1978          * Other bits are valid only if ATA_DMA_ACTIVE==0,
1979          * and the ATA_DMA_INTR bit doesn't exist.
1980          */
1981         reg = readl(port_mmio + BMDMA_STATUS);
1982         if (reg & ATA_DMA_ACTIVE)
1983                 status = ATA_DMA_ACTIVE;
1984         else if (reg & ATA_DMA_ERR)
1985                 status = (reg & ATA_DMA_ERR) | ATA_DMA_INTR;
1986         else {
1987                 /*
1988                  * Just because DMA_ACTIVE is 0 (DMA completed),
1989                  * this does _not_ mean the device is "done".
1990                  * So we should not yet be signalling ATA_DMA_INTR
1991                  * in some cases.  Eg. DSM/TRIM, and perhaps others.
1992                  */
1993                 mv_bmdma_stop_ap(ap);
1994                 if (ioread8(ap->ioaddr.altstatus_addr) & ATA_BUSY)
1995                         status = 0;
1996                 else
1997                         status = ATA_DMA_INTR;
1998         }
1999         return status;
2000 }
2001 
2002 static void mv_rw_multi_errata_sata24(struct ata_queued_cmd *qc)
2003 {
2004         struct ata_taskfile *tf = &qc->tf;
2005         /*
2006          * Workaround for 88SX60x1 FEr SATA#24.
2007          *
2008          * Chip may corrupt WRITEs if multi_count >= 4kB.
2009          * Note that READs are unaffected.
2010          *
2011          * It's not clear if this errata really means "4K bytes",
2012          * or if it always happens for multi_count > 7
2013          * regardless of device sector_size.
2014          *
2015          * So, for safety, any write with multi_count > 7
2016          * gets converted here into a regular PIO write instead:
2017          */
2018         if ((tf->flags & ATA_TFLAG_WRITE) && is_multi_taskfile(tf)) {
2019                 if (qc->dev->multi_count > 7) {
2020                         switch (tf->command) {
2021                         case ATA_CMD_WRITE_MULTI:
2022                                 tf->command = ATA_CMD_PIO_WRITE;
2023                                 break;
2024                         case ATA_CMD_WRITE_MULTI_FUA_EXT:
2025                                 tf->flags &= ~ATA_TFLAG_FUA; /* ugh */
2026                                 /* fall through */
2027                         case ATA_CMD_WRITE_MULTI_EXT:
2028                                 tf->command = ATA_CMD_PIO_WRITE_EXT;
2029                                 break;
2030                         }
2031                 }
2032         }
2033 }
2034 
2035 /**
2036  *      mv_qc_prep - Host specific command preparation.
2037  *      @qc: queued command to prepare
2038  *
2039  *      This routine simply redirects to the general purpose routine
2040  *      if command is not DMA.  Else, it handles prep of the CRQB
2041  *      (command request block), does some sanity checking, and calls
2042  *      the SG load routine.
2043  *
2044  *      LOCKING:
2045  *      Inherited from caller.
2046  */
2047 static void mv_qc_prep(struct ata_queued_cmd *qc)
2048 {
2049         struct ata_port *ap = qc->ap;
2050         struct mv_port_priv *pp = ap->private_data;
2051         __le16 *cw;
2052         struct ata_taskfile *tf = &qc->tf;
2053         u16 flags = 0;
2054         unsigned in_index;
2055 
2056         switch (tf->protocol) {
2057         case ATA_PROT_DMA:
2058                 if (tf->command == ATA_CMD_DSM)
2059                         return;
2060                 /* fall-thru */
2061         case ATA_PROT_NCQ:
2062                 break;  /* continue below */
2063         case ATA_PROT_PIO:
2064                 mv_rw_multi_errata_sata24(qc);
2065                 return;
2066         default:
2067                 return;
2068         }
2069 
2070         /* Fill in command request block
2071          */
2072         if (!(tf->flags & ATA_TFLAG_WRITE))
2073                 flags |= CRQB_FLAG_READ;
2074         WARN_ON(MV_MAX_Q_DEPTH <= qc->tag);
2075         flags |= qc->tag << CRQB_TAG_SHIFT;
2076         flags |= (qc->dev->link->pmp & 0xf) << CRQB_PMP_SHIFT;
2077 
2078         /* get current queue index from software */
2079         in_index = pp->req_idx;
2080 
2081         pp->crqb[in_index].sg_addr =
2082                 cpu_to_le32(pp->sg_tbl_dma[qc->tag] & 0xffffffff);
2083         pp->crqb[in_index].sg_addr_hi =
2084                 cpu_to_le32((pp->sg_tbl_dma[qc->tag] >> 16) >> 16);
2085         pp->crqb[in_index].ctrl_flags = cpu_to_le16(flags);
2086 
2087         cw = &pp->crqb[in_index].ata_cmd[0];
2088 
2089         /* Sadly, the CRQB cannot accommodate all registers--there are
2090          * only 11 bytes...so we must pick and choose required
2091          * registers based on the command.  So, we drop feature and
2092          * hob_feature for [RW] DMA commands, but they are needed for
2093          * NCQ.  NCQ will drop hob_nsect, which is not needed there
2094          * (nsect is used only for the tag; feat/hob_feat hold true nsect).
2095          */
2096         switch (tf->command) {
2097         case ATA_CMD_READ:
2098         case ATA_CMD_READ_EXT:
2099         case ATA_CMD_WRITE:
2100         case ATA_CMD_WRITE_EXT:
2101         case ATA_CMD_WRITE_FUA_EXT:
2102                 mv_crqb_pack_cmd(cw++, tf->hob_nsect, ATA_REG_NSECT, 0);
2103                 break;
2104         case ATA_CMD_FPDMA_READ:
2105         case ATA_CMD_FPDMA_WRITE:
2106                 mv_crqb_pack_cmd(cw++, tf->hob_feature, ATA_REG_FEATURE, 0);
2107                 mv_crqb_pack_cmd(cw++, tf->feature, ATA_REG_FEATURE, 0);
2108                 break;
2109         default:
2110                 /* The only other commands EDMA supports in non-queued and
2111                  * non-NCQ mode are: [RW] STREAM DMA and W DMA FUA EXT, none
2112                  * of which are defined/used by Linux.  If we get here, this
2113                  * driver needs work.
2114                  *
2115                  * FIXME: modify libata to give qc_prep a return value and
2116                  * return error here.
2117                  */
2118                 BUG_ON(tf->command);
2119                 break;
2120         }
2121         mv_crqb_pack_cmd(cw++, tf->nsect, ATA_REG_NSECT, 0);
2122         mv_crqb_pack_cmd(cw++, tf->hob_lbal, ATA_REG_LBAL, 0);
2123         mv_crqb_pack_cmd(cw++, tf->lbal, ATA_REG_LBAL, 0);
2124         mv_crqb_pack_cmd(cw++, tf->hob_lbam, ATA_REG_LBAM, 0);
2125         mv_crqb_pack_cmd(cw++, tf->lbam, ATA_REG_LBAM, 0);
2126         mv_crqb_pack_cmd(cw++, tf->hob_lbah, ATA_REG_LBAH, 0);
2127         mv_crqb_pack_cmd(cw++, tf->lbah, ATA_REG_LBAH, 0);
2128         mv_crqb_pack_cmd(cw++, tf->device, ATA_REG_DEVICE, 0);
2129         mv_crqb_pack_cmd(cw++, tf->command, ATA_REG_CMD, 1);    /* last */
2130 
2131         if (!(qc->flags & ATA_QCFLAG_DMAMAP))
2132                 return;
2133         mv_fill_sg(qc);
2134 }
2135 
2136 /**
2137  *      mv_qc_prep_iie - Host specific command preparation.
2138  *      @qc: queued command to prepare
2139  *
2140  *      This routine simply redirects to the general purpose routine
2141  *      if command is not DMA.  Else, it handles prep of the CRQB
2142  *      (command request block), does some sanity checking, and calls
2143  *      the SG load routine.
2144  *
2145  *      LOCKING:
2146  *      Inherited from caller.
2147  */
2148 static void mv_qc_prep_iie(struct ata_queued_cmd *qc)
2149 {
2150         struct ata_port *ap = qc->ap;
2151         struct mv_port_priv *pp = ap->private_data;
2152         struct mv_crqb_iie *crqb;
2153         struct ata_taskfile *tf = &qc->tf;
2154         unsigned in_index;
2155         u32 flags = 0;
2156 
2157         if ((tf->protocol != ATA_PROT_DMA) &&
2158             (tf->protocol != ATA_PROT_NCQ))
2159                 return;
2160         if (tf->command == ATA_CMD_DSM)
2161                 return;  /* use bmdma for this */
2162 
2163         /* Fill in Gen IIE command request block */
2164         if (!(tf->flags & ATA_TFLAG_WRITE))
2165                 flags |= CRQB_FLAG_READ;
2166 
2167         WARN_ON(MV_MAX_Q_DEPTH <= qc->tag);
2168         flags |= qc->tag << CRQB_TAG_SHIFT;
2169         flags |= qc->tag << CRQB_HOSTQ_SHIFT;
2170         flags |= (qc->dev->link->pmp & 0xf) << CRQB_PMP_SHIFT;
2171 
2172         /* get current queue index from software */
2173         in_index = pp->req_idx;
2174 
2175         crqb = (struct mv_crqb_iie *) &pp->crqb[in_index];
2176         crqb->addr = cpu_to_le32(pp->sg_tbl_dma[qc->tag] & 0xffffffff);
2177         crqb->addr_hi = cpu_to_le32((pp->sg_tbl_dma[qc->tag] >> 16) >> 16);
2178         crqb->flags = cpu_to_le32(flags);
2179 
2180         crqb->ata_cmd[0] = cpu_to_le32(
2181                         (tf->command << 16) |
2182                         (tf->feature << 24)
2183                 );
2184         crqb->ata_cmd[1] = cpu_to_le32(
2185                         (tf->lbal << 0) |
2186                         (tf->lbam << 8) |
2187                         (tf->lbah << 16) |
2188                         (tf->device << 24)
2189                 );
2190         crqb->ata_cmd[2] = cpu_to_le32(
2191                         (tf->hob_lbal << 0) |
2192                         (tf->hob_lbam << 8) |
2193                         (tf->hob_lbah << 16) |
2194                         (tf->hob_feature << 24)
2195                 );
2196         crqb->ata_cmd[3] = cpu_to_le32(
2197                         (tf->nsect << 0) |
2198                         (tf->hob_nsect << 8)
2199                 );
2200 
2201         if (!(qc->flags & ATA_QCFLAG_DMAMAP))
2202                 return;
2203         mv_fill_sg(qc);
2204 }
2205 
2206 /**
2207  *      mv_sff_check_status - fetch device status, if valid
2208  *      @ap: ATA port to fetch status from
2209  *
2210  *      When using command issue via mv_qc_issue_fis(),
2211  *      the initial ATA_BUSY state does not show up in the
2212  *      ATA status (shadow) register.  This can confuse libata!
2213  *
2214  *      So we have a hook here to fake ATA_BUSY for that situation,
2215  *      until the first time a BUSY, DRQ, or ERR bit is seen.
2216  *
2217  *      The rest of the time, it simply returns the ATA status register.
2218  */
2219 static u8 mv_sff_check_status(struct ata_port *ap)
2220 {
2221         u8 stat = ioread8(ap->ioaddr.status_addr);
2222         struct mv_port_priv *pp = ap->private_data;
2223 
2224         if (pp->pp_flags & MV_PP_FLAG_FAKE_ATA_BUSY) {
2225                 if (stat & (ATA_BUSY | ATA_DRQ | ATA_ERR))
2226                         pp->pp_flags &= ~MV_PP_FLAG_FAKE_ATA_BUSY;
2227                 else
2228                         stat = ATA_BUSY;
2229         }
2230         return stat;
2231 }
2232 
2233 /**
2234  *      mv_send_fis - Send a FIS, using the "Vendor-Unique FIS" register
2235  *      @fis: fis to be sent
2236  *      @nwords: number of 32-bit words in the fis
2237  */
2238 static unsigned int mv_send_fis(struct ata_port *ap, u32 *fis, int nwords)
2239 {
2240         void __iomem *port_mmio = mv_ap_base(ap);
2241         u32 ifctl, old_ifctl, ifstat;
2242         int i, timeout = 200, final_word = nwords - 1;
2243 
2244         /* Initiate FIS transmission mode */
2245         old_ifctl = readl(port_mmio + SATA_IFCTL);
2246         ifctl = 0x100 | (old_ifctl & 0xf);
2247         writelfl(ifctl, port_mmio + SATA_IFCTL);
2248 
2249         /* Send all words of the FIS except for the final word */
2250         for (i = 0; i < final_word; ++i)
2251                 writel(fis[i], port_mmio + VENDOR_UNIQUE_FIS);
2252 
2253         /* Flag end-of-transmission, and then send the final word */
2254         writelfl(ifctl | 0x200, port_mmio + SATA_IFCTL);
2255         writelfl(fis[final_word], port_mmio + VENDOR_UNIQUE_FIS);
2256 
2257         /*
2258          * Wait for FIS transmission to complete.
2259          * This typically takes just a single iteration.
2260          */
2261         do {
2262                 ifstat = readl(port_mmio + SATA_IFSTAT);
2263         } while (!(ifstat & 0x1000) && --timeout);
2264 
2265         /* Restore original port configuration */
2266         writelfl(old_ifctl, port_mmio + SATA_IFCTL);
2267 
2268         /* See if it worked */
2269         if ((ifstat & 0x3000) != 0x1000) {
2270                 ata_port_warn(ap, "%s transmission error, ifstat=%08x\n",
2271                               __func__, ifstat);
2272                 return AC_ERR_OTHER;
2273         }
2274         return 0;
2275 }
2276 
2277 /**
2278  *      mv_qc_issue_fis - Issue a command directly as a FIS
2279  *      @qc: queued command to start
2280  *
2281  *      Note that the ATA shadow registers are not updated
2282  *      after command issue, so the device will appear "READY"
2283  *      if polled, even while it is BUSY processing the command.
2284  *
2285  *      So we use a status hook to fake ATA_BUSY until the drive changes state.
2286  *
2287  *      Note: we don't get updated shadow regs on *completion*
2288  *      of non-data commands. So avoid sending them via this function,
2289  *      as they will appear to have completed immediately.
2290  *
2291  *      GEN_IIE has special registers that we could get the result tf from,
2292  *      but earlier chipsets do not.  For now, we ignore those registers.
2293  */
2294 static unsigned int mv_qc_issue_fis(struct ata_queued_cmd *qc)
2295 {
2296         struct ata_port *ap = qc->ap;
2297         struct mv_port_priv *pp = ap->private_data;
2298         struct ata_link *link = qc->dev->link;
2299         u32 fis[5];
2300         int err = 0;
2301 
2302         ata_tf_to_fis(&qc->tf, link->pmp, 1, (void *)fis);
2303         err = mv_send_fis(ap, fis, ARRAY_SIZE(fis));
2304         if (err)
2305                 return err;
2306 
2307         switch (qc->tf.protocol) {
2308         case ATAPI_PROT_PIO:
2309                 pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY;
2310                 /* fall through */
2311         case ATAPI_PROT_NODATA:
2312                 ap->hsm_task_state = HSM_ST_FIRST;
2313                 break;
2314         case ATA_PROT_PIO:
2315                 pp->pp_flags |= MV_PP_FLAG_FAKE_ATA_BUSY;
2316                 if (qc->tf.flags & ATA_TFLAG_WRITE)
2317                         ap->hsm_task_state = HSM_ST_FIRST;
2318                 else
2319                         ap->hsm_task_state = HSM_ST;
2320                 break;
2321         default:
2322                 ap->hsm_task_state = HSM_ST_LAST;
2323                 break;
2324         }
2325 
2326         if (qc->tf.flags & ATA_TFLAG_POLLING)
2327                 ata_sff_queue_pio_task(link, 0);
2328         return 0;
2329 }
2330 
2331 /**
2332  *      mv_qc_issue - Initiate a command to the host
2333  *      @qc: queued command to start
2334  *
2335  *      This routine simply redirects to the general purpose routine
2336  *      if command is not DMA.  Else, it sanity checks our local
2337  *      caches of the request producer/consumer indices then enables
2338  *      DMA and bumps the request producer index.
2339  *
2340  *      LOCKING:
2341  *      Inherited from caller.
2342  */
2343 static unsigned int mv_qc_issue(struct ata_queued_cmd *qc)
2344 {
2345         static int limit_warnings = 10;
2346         struct ata_port *ap = qc->ap;
2347         void __iomem *port_mmio = mv_ap_base(ap);
2348         struct mv_port_priv *pp = ap->private_data;
2349         u32 in_index;
2350         unsigned int port_irqs;
2351 
2352         pp->pp_flags &= ~MV_PP_FLAG_FAKE_ATA_BUSY; /* paranoia */
2353 
2354         switch (qc->tf.protocol) {
2355         case ATA_PROT_DMA:
2356                 if (qc->tf.command == ATA_CMD_DSM) {
2357                         if (!ap->ops->bmdma_setup)  /* no bmdma on GEN_I */
2358                                 return AC_ERR_OTHER;
2359                         break;  /* use bmdma for this */
2360                 }
2361                 /* fall thru */
2362         case ATA_PROT_NCQ:
2363                 mv_start_edma(ap, port_mmio, pp, qc->tf.protocol);
2364                 pp->req_idx = (pp->req_idx + 1) & MV_MAX_Q_DEPTH_MASK;
2365                 in_index = pp->req_idx << EDMA_REQ_Q_PTR_SHIFT;
2366 
2367                 /* Write the request in pointer to kick the EDMA to life */
2368                 writelfl((pp->crqb_dma & EDMA_REQ_Q_BASE_LO_MASK) | in_index,
2369                                         port_mmio + EDMA_REQ_Q_IN_PTR);
2370                 return 0;
2371 
2372         case ATA_PROT_PIO:
2373                 /*
2374                  * Errata SATA#16, SATA#24: warn if multiple DRQs expected.
2375                  *
2376                  * Someday, we might implement special polling workarounds
2377                  * for these, but it all seems rather unnecessary since we
2378                  * normally use only DMA for commands which transfer more
2379                  * than a single block of data.
2380                  *
2381                  * Much of the time, this could just work regardless.
2382                  * So for now, just log the incident, and allow the attempt.
2383                  */
2384                 if (limit_warnings > 0 && (qc->nbytes / qc->sect_size) > 1) {
2385                         --limit_warnings;
2386                         ata_link_warn(qc->dev->link, DRV_NAME
2387                                       ": attempting PIO w/multiple DRQ: "
2388                                       "this may fail due to h/w errata\n");
2389                 }
2390                 /* drop through */
2391         case ATA_PROT_NODATA:
2392         case ATAPI_PROT_PIO:
2393         case ATAPI_PROT_NODATA:
2394                 if (ap->flags & ATA_FLAG_PIO_POLLING)
2395                         qc->tf.flags |= ATA_TFLAG_POLLING;
2396                 break;
2397         }
2398 
2399         if (qc->tf.flags & ATA_TFLAG_POLLING)
2400                 port_irqs = ERR_IRQ;    /* mask device interrupt when polling */
2401         else
2402                 port_irqs = ERR_IRQ | DONE_IRQ; /* unmask all interrupts */
2403 
2404         /*
2405          * We're about to send a non-EDMA capable command to the
2406          * port.  Turn off EDMA so there won't be problems accessing
2407          * shadow block, etc registers.
2408          */
2409         mv_stop_edma(ap);
2410         mv_clear_and_enable_port_irqs(ap, mv_ap_base(ap), port_irqs);
2411         mv_pmp_select(ap, qc->dev->link->pmp);
2412 
2413         if (qc->tf.command == ATA_CMD_READ_LOG_EXT) {
2414                 struct mv_host_priv *hpriv = ap->host->private_data;
2415                 /*
2416                  * Workaround for 88SX60x1 FEr SATA#25 (part 2).
2417                  *
2418                  * After any NCQ error, the READ_LOG_EXT command
2419                  * from libata-eh *must* use mv_qc_issue_fis().
2420                  * Otherwise it might fail, due to chip errata.
2421                  *
2422                  * Rather than special-case it, we'll just *always*
2423                  * use this method here for READ_LOG_EXT, making for
2424                  * easier testing.
2425                  */
2426                 if (IS_GEN_II(hpriv))
2427                         return mv_qc_issue_fis(qc);
2428         }
2429         return ata_bmdma_qc_issue(qc);
2430 }
2431 
2432 static struct ata_queued_cmd *mv_get_active_qc(struct ata_port *ap)
2433 {
2434         struct mv_port_priv *pp = ap->private_data;
2435         struct ata_queued_cmd *qc;
2436 
2437         if (pp->pp_flags & MV_PP_FLAG_NCQ_EN)
2438                 return NULL;
2439         qc = ata_qc_from_tag(ap, ap->link.active_tag);
2440         if (qc && !(qc->tf.flags & ATA_TFLAG_POLLING))
2441                 return qc;
2442         return NULL;
2443 }
2444 
2445 static void mv_pmp_error_handler(struct ata_port *ap)
2446 {
2447         unsigned int pmp, pmp_map;
2448         struct mv_port_priv *pp = ap->private_data;
2449 
2450         if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH) {
2451                 /*
2452                  * Perform NCQ error analysis on failed PMPs
2453                  * before we freeze the port entirely.
2454                  *
2455                  * The failed PMPs are marked earlier by mv_pmp_eh_prep().
2456                  */
2457                 pmp_map = pp->delayed_eh_pmp_map;
2458                 pp->pp_flags &= ~MV_PP_FLAG_DELAYED_EH;
2459                 for (pmp = 0; pmp_map != 0; pmp++) {
2460                         unsigned int this_pmp = (1 << pmp);
2461                         if (pmp_map & this_pmp) {
2462                                 struct ata_link *link = &ap->pmp_link[pmp];
2463                                 pmp_map &= ~this_pmp;
2464                                 ata_eh_analyze_ncq_error(link);
2465                         }
2466                 }
2467                 ata_port_freeze(ap);
2468         }
2469         sata_pmp_error_handler(ap);
2470 }
2471 
2472 static unsigned int mv_get_err_pmp_map(struct ata_port *ap)
2473 {
2474         void __iomem *port_mmio = mv_ap_base(ap);
2475 
2476         return readl(port_mmio + SATA_TESTCTL) >> 16;
2477 }
2478 
2479 static void mv_pmp_eh_prep(struct ata_port *ap, unsigned int pmp_map)
2480 {
2481         struct ata_eh_info *ehi;
2482         unsigned int pmp;
2483 
2484         /*
2485          * Initialize EH info for PMPs which saw device errors
2486          */
2487         ehi = &ap->link.eh_info;
2488         for (pmp = 0; pmp_map != 0; pmp++) {
2489                 unsigned int this_pmp = (1 << pmp);
2490                 if (pmp_map & this_pmp) {
2491                         struct ata_link *link = &ap->pmp_link[pmp];
2492 
2493                         pmp_map &= ~this_pmp;
2494                         ehi = &link->eh_info;
2495                         ata_ehi_clear_desc(ehi);
2496                         ata_ehi_push_desc(ehi, "dev err");
2497                         ehi->err_mask |= AC_ERR_DEV;
2498                         ehi->action |= ATA_EH_RESET;
2499                         ata_link_abort(link);
2500                 }
2501         }
2502 }
2503 
2504 static int mv_req_q_empty(struct ata_port *ap)
2505 {
2506         void __iomem *port_mmio = mv_ap_base(ap);
2507         u32 in_ptr, out_ptr;
2508 
2509         in_ptr  = (readl(port_mmio + EDMA_REQ_Q_IN_PTR)
2510                         >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
2511         out_ptr = (readl(port_mmio + EDMA_REQ_Q_OUT_PTR)
2512                         >> EDMA_REQ_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
2513         return (in_ptr == out_ptr);     /* 1 == queue_is_empty */
2514 }
2515 
2516 static int mv_handle_fbs_ncq_dev_err(struct ata_port *ap)
2517 {
2518         struct mv_port_priv *pp = ap->private_data;
2519         int failed_links;
2520         unsigned int old_map, new_map;
2521 
2522         /*
2523          * Device error during FBS+NCQ operation:
2524          *
2525          * Set a port flag to prevent further I/O being enqueued.
2526          * Leave the EDMA running to drain outstanding commands from this port.
2527          * Perform the post-mortem/EH only when all responses are complete.
2528          * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.2).
2529          */
2530         if (!(pp->pp_flags & MV_PP_FLAG_DELAYED_EH)) {
2531                 pp->pp_flags |= MV_PP_FLAG_DELAYED_EH;
2532                 pp->delayed_eh_pmp_map = 0;
2533         }
2534         old_map = pp->delayed_eh_pmp_map;
2535         new_map = old_map | mv_get_err_pmp_map(ap);
2536 
2537         if (old_map != new_map) {
2538                 pp->delayed_eh_pmp_map = new_map;
2539                 mv_pmp_eh_prep(ap, new_map & ~old_map);
2540         }
2541         failed_links = hweight16(new_map);
2542 
2543         ata_port_info(ap,
2544                       "%s: pmp_map=%04x qc_map=%04x failed_links=%d nr_active_links=%d\n",
2545                       __func__, pp->delayed_eh_pmp_map,
2546                       ap->qc_active, failed_links,
2547                       ap->nr_active_links);
2548 
2549         if (ap->nr_active_links <= failed_links && mv_req_q_empty(ap)) {
2550                 mv_process_crpb_entries(ap, pp);
2551                 mv_stop_edma(ap);
2552                 mv_eh_freeze(ap);
2553                 ata_port_info(ap, "%s: done\n", __func__);
2554                 return 1;       /* handled */
2555         }
2556         ata_port_info(ap, "%s: waiting\n", __func__);
2557         return 1;       /* handled */
2558 }
2559 
2560 static int mv_handle_fbs_non_ncq_dev_err(struct ata_port *ap)
2561 {
2562         /*
2563          * Possible future enhancement:
2564          *
2565          * FBS+non-NCQ operation is not yet implemented.
2566          * See related notes in mv_edma_cfg().
2567          *
2568          * Device error during FBS+non-NCQ operation:
2569          *
2570          * We need to snapshot the shadow registers for each failed command.
2571          * Follow recovery sequence from 6042/7042 datasheet (7.3.15.4.2.3).
2572          */
2573         return 0;       /* not handled */
2574 }
2575 
2576 static int mv_handle_dev_err(struct ata_port *ap, u32 edma_err_cause)
2577 {
2578         struct mv_port_priv *pp = ap->private_data;
2579 
2580         if (!(pp->pp_flags & MV_PP_FLAG_EDMA_EN))
2581                 return 0;       /* EDMA was not active: not handled */
2582         if (!(pp->pp_flags & MV_PP_FLAG_FBS_EN))
2583                 return 0;       /* FBS was not active: not handled */
2584 
2585         if (!(edma_err_cause & EDMA_ERR_DEV))
2586                 return 0;       /* non DEV error: not handled */
2587         edma_err_cause &= ~EDMA_ERR_IRQ_TRANSIENT;
2588         if (edma_err_cause & ~(EDMA_ERR_DEV | EDMA_ERR_SELF_DIS))
2589                 return 0;       /* other problems: not handled */
2590 
2591         if (pp->pp_flags & MV_PP_FLAG_NCQ_EN) {
2592                 /*
2593                  * EDMA should NOT have self-disabled for this case.
2594                  * If it did, then something is wrong elsewhere,
2595                  * and we cannot handle it here.
2596                  */
2597                 if (edma_err_cause & EDMA_ERR_SELF_DIS) {
2598                         ata_port_warn(ap, "%s: err_cause=0x%x pp_flags=0x%x\n",
2599                                       __func__, edma_err_cause, pp->pp_flags);
2600                         return 0; /* not handled */
2601                 }
2602                 return mv_handle_fbs_ncq_dev_err(ap);
2603         } else {
2604                 /*
2605                  * EDMA should have self-disabled for this case.
2606                  * If it did not, then something is wrong elsewhere,
2607                  * and we cannot handle it here.
2608                  */
2609                 if (!(edma_err_cause & EDMA_ERR_SELF_DIS)) {
2610                         ata_port_warn(ap, "%s: err_cause=0x%x pp_flags=0x%x\n",
2611                                       __func__, edma_err_cause, pp->pp_flags);
2612                         return 0; /* not handled */
2613                 }
2614                 return mv_handle_fbs_non_ncq_dev_err(ap);
2615         }
2616         return 0;       /* not handled */
2617 }
2618 
2619 static void mv_unexpected_intr(struct ata_port *ap, int edma_was_enabled)
2620 {
2621         struct ata_eh_info *ehi = &ap->link.eh_info;
2622         char *when = "idle";
2623 
2624         ata_ehi_clear_desc(ehi);
2625         if (edma_was_enabled) {
2626                 when = "EDMA enabled";
2627         } else {
2628                 struct ata_queued_cmd *qc = ata_qc_from_tag(ap, ap->link.active_tag);
2629                 if (qc && (qc->tf.flags & ATA_TFLAG_POLLING))
2630                         when = "polling";
2631         }
2632         ata_ehi_push_desc(ehi, "unexpected device interrupt while %s", when);
2633         ehi->err_mask |= AC_ERR_OTHER;
2634         ehi->action   |= ATA_EH_RESET;
2635         ata_port_freeze(ap);
2636 }
2637 
2638 /**
2639  *      mv_err_intr - Handle error interrupts on the port
2640  *      @ap: ATA channel to manipulate
2641  *
2642  *      Most cases require a full reset of the chip's state machine,
2643  *      which also performs a COMRESET.
2644  *      Also, if the port disabled DMA, update our cached copy to match.
2645  *
2646  *      LOCKING:
2647  *      Inherited from caller.
2648  */
2649 static void mv_err_intr(struct ata_port *ap)
2650 {
2651         void __iomem *port_mmio = mv_ap_base(ap);
2652         u32 edma_err_cause, eh_freeze_mask, serr = 0;
2653         u32 fis_cause = 0;
2654         struct mv_port_priv *pp = ap->private_data;
2655         struct mv_host_priv *hpriv = ap->host->private_data;
2656         unsigned int action = 0, err_mask = 0;
2657         struct ata_eh_info *ehi = &ap->link.eh_info;
2658         struct ata_queued_cmd *qc;
2659         int abort = 0;
2660 
2661         /*
2662          * Read and clear the SError and err_cause bits.
2663          * For GenIIe, if EDMA_ERR_TRANS_IRQ_7 is set, we also must read/clear
2664          * the FIS_IRQ_CAUSE register before clearing edma_err_cause.
2665          */
2666         sata_scr_read(&ap->link, SCR_ERROR, &serr);
2667         sata_scr_write_flush(&ap->link, SCR_ERROR, serr);
2668 
2669         edma_err_cause = readl(port_mmio + EDMA_ERR_IRQ_CAUSE);
2670         if (IS_GEN_IIE(hpriv) && (edma_err_cause & EDMA_ERR_TRANS_IRQ_7)) {
2671                 fis_cause = readl(port_mmio + FIS_IRQ_CAUSE);
2672                 writelfl(~fis_cause, port_mmio + FIS_IRQ_CAUSE);
2673         }
2674         writelfl(~edma_err_cause, port_mmio + EDMA_ERR_IRQ_CAUSE);
2675 
2676         if (edma_err_cause & EDMA_ERR_DEV) {
2677                 /*
2678                  * Device errors during FIS-based switching operation
2679                  * require special handling.
2680                  */
2681                 if (mv_handle_dev_err(ap, edma_err_cause))
2682                         return;
2683         }
2684 
2685         qc = mv_get_active_qc(ap);
2686         ata_ehi_clear_desc(ehi);
2687         ata_ehi_push_desc(ehi, "edma_err_cause=%08x pp_flags=%08x",
2688                           edma_err_cause, pp->pp_flags);
2689 
2690         if (IS_GEN_IIE(hpriv) && (edma_err_cause & EDMA_ERR_TRANS_IRQ_7)) {
2691                 ata_ehi_push_desc(ehi, "fis_cause=%08x", fis_cause);
2692                 if (fis_cause & FIS_IRQ_CAUSE_AN) {
2693                         u32 ec = edma_err_cause &
2694                                ~(EDMA_ERR_TRANS_IRQ_7 | EDMA_ERR_IRQ_TRANSIENT);
2695                         sata_async_notification(ap);
2696                         if (!ec)
2697                                 return; /* Just an AN; no need for the nukes */
2698                         ata_ehi_push_desc(ehi, "SDB notify");
2699                 }
2700         }
2701         /*
2702          * All generations share these EDMA error cause bits:
2703          */
2704         if (edma_err_cause & EDMA_ERR_DEV) {
2705                 err_mask |= AC_ERR_DEV;
2706                 action |= ATA_EH_RESET;
2707                 ata_ehi_push_desc(ehi, "dev error");
2708         }
2709         if (edma_err_cause & (EDMA_ERR_D_PAR | EDMA_ERR_PRD_PAR |
2710                         EDMA_ERR_CRQB_PAR | EDMA_ERR_CRPB_PAR |
2711                         EDMA_ERR_INTRL_PAR)) {
2712                 err_mask |= AC_ERR_ATA_BUS;
2713                 action |= ATA_EH_RESET;
2714                 ata_ehi_push_desc(ehi, "parity error");
2715         }
2716         if (edma_err_cause & (EDMA_ERR_DEV_DCON | EDMA_ERR_DEV_CON)) {
2717                 ata_ehi_hotplugged(ehi);
2718                 ata_ehi_push_desc(ehi, edma_err_cause & EDMA_ERR_DEV_DCON ?
2719                         "dev disconnect" : "dev connect");
2720                 action |= ATA_EH_RESET;
2721         }
2722 
2723         /*
2724          * Gen-I has a different SELF_DIS bit,
2725          * different FREEZE bits, and no SERR bit:
2726          */
2727         if (IS_GEN_I(hpriv)) {
2728                 eh_freeze_mask = EDMA_EH_FREEZE_5;
2729                 if (edma_err_cause & EDMA_ERR_SELF_DIS_5) {
2730                         pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
2731                         ata_ehi_push_desc(ehi, "EDMA self-disable");
2732                 }
2733         } else {
2734                 eh_freeze_mask = EDMA_EH_FREEZE;
2735                 if (edma_err_cause & EDMA_ERR_SELF_DIS) {
2736                         pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
2737                         ata_ehi_push_desc(ehi, "EDMA self-disable");
2738                 }
2739                 if (edma_err_cause & EDMA_ERR_SERR) {
2740                         ata_ehi_push_desc(ehi, "SError=%08x", serr);
2741                         err_mask |= AC_ERR_ATA_BUS;
2742                         action |= ATA_EH_RESET;
2743                 }
2744         }
2745 
2746         if (!err_mask) {
2747                 err_mask = AC_ERR_OTHER;
2748                 action |= ATA_EH_RESET;
2749         }
2750 
2751         ehi->serror |= serr;
2752         ehi->action |= action;
2753 
2754         if (qc)
2755                 qc->err_mask |= err_mask;
2756         else
2757                 ehi->err_mask |= err_mask;
2758 
2759         if (err_mask == AC_ERR_DEV) {
2760                 /*
2761                  * Cannot do ata_port_freeze() here,
2762                  * because it would kill PIO access,
2763                  * which is needed for further diagnosis.
2764                  */
2765                 mv_eh_freeze(ap);
2766                 abort = 1;
2767         } else if (edma_err_cause & eh_freeze_mask) {
2768                 /*
2769                  * Note to self: ata_port_freeze() calls ata_port_abort()
2770                  */
2771                 ata_port_freeze(ap);
2772         } else {
2773                 abort = 1;
2774         }
2775 
2776         if (abort) {
2777                 if (qc)
2778                         ata_link_abort(qc->dev->link);
2779                 else
2780                         ata_port_abort(ap);
2781         }
2782 }
2783 
2784 static bool mv_process_crpb_response(struct ata_port *ap,
2785                 struct mv_crpb *response, unsigned int tag, int ncq_enabled)
2786 {
2787         u8 ata_status;
2788         u16 edma_status = le16_to_cpu(response->flags);
2789 
2790         /*
2791          * edma_status from a response queue entry:
2792          *   LSB is from EDMA_ERR_IRQ_CAUSE (non-NCQ only).
2793          *   MSB is saved ATA status from command completion.
2794          */
2795         if (!ncq_enabled) {
2796                 u8 err_cause = edma_status & 0xff & ~EDMA_ERR_DEV;
2797                 if (err_cause) {
2798                         /*
2799                          * Error will be seen/handled by
2800                          * mv_err_intr().  So do nothing at all here.
2801                          */
2802                         return false;
2803                 }
2804         }
2805         ata_status = edma_status >> CRPB_FLAG_STATUS_SHIFT;
2806         if (!ac_err_mask(ata_status))
2807                 return true;
2808         /* else: leave it for mv_err_intr() */
2809         return false;
2810 }
2811 
2812 static void mv_process_crpb_entries(struct ata_port *ap, struct mv_port_priv *pp)
2813 {
2814         void __iomem *port_mmio = mv_ap_base(ap);
2815         struct mv_host_priv *hpriv = ap->host->private_data;
2816         u32 in_index;
2817         bool work_done = false;
2818         u32 done_mask = 0;
2819         int ncq_enabled = (pp->pp_flags & MV_PP_FLAG_NCQ_EN);
2820 
2821         /* Get the hardware queue position index */
2822         in_index = (readl(port_mmio + EDMA_RSP_Q_IN_PTR)
2823                         >> EDMA_RSP_Q_PTR_SHIFT) & MV_MAX_Q_DEPTH_MASK;
2824 
2825         /* Process new responses from since the last time we looked */
2826         while (in_index != pp->resp_idx) {
2827                 unsigned int tag;
2828                 struct mv_crpb *response = &pp->crpb[pp->resp_idx];
2829 
2830                 pp->resp_idx = (pp->resp_idx + 1) & MV_MAX_Q_DEPTH_MASK;
2831 
2832                 if (IS_GEN_I(hpriv)) {
2833                         /* 50xx: no NCQ, only one command active at a time */
2834                         tag = ap->link.active_tag;
2835                 } else {
2836                         /* Gen II/IIE: get command tag from CRPB entry */
2837                         tag = le16_to_cpu(response->id) & 0x1f;
2838                 }
2839                 if (mv_process_crpb_response(ap, response, tag, ncq_enabled))
2840                         done_mask |= 1 << tag;
2841                 work_done = true;
2842         }
2843 
2844         if (work_done) {
2845                 ata_qc_complete_multiple(ap, ap->qc_active ^ done_mask);
2846 
2847                 /* Update the software queue position index in hardware */
2848                 writelfl((pp->crpb_dma & EDMA_RSP_Q_BASE_LO_MASK) |
2849                          (pp->resp_idx << EDMA_RSP_Q_PTR_SHIFT),
2850                          port_mmio + EDMA_RSP_Q_OUT_PTR);
2851         }
2852 }
2853 
2854 static void mv_port_intr(struct ata_port *ap, u32 port_cause)
2855 {
2856         struct mv_port_priv *pp;
2857         int edma_was_enabled;
2858 
2859         /*
2860          * Grab a snapshot of the EDMA_EN flag setting,
2861          * so that we have a consistent view for this port,
2862          * even if something we call of our routines changes it.
2863          */
2864         pp = ap->private_data;
2865         edma_was_enabled = (pp->pp_flags & MV_PP_FLAG_EDMA_EN);
2866         /*
2867          * Process completed CRPB response(s) before other events.
2868          */
2869         if (edma_was_enabled && (port_cause & DONE_IRQ)) {
2870                 mv_process_crpb_entries(ap, pp);
2871                 if (pp->pp_flags & MV_PP_FLAG_DELAYED_EH)
2872                         mv_handle_fbs_ncq_dev_err(ap);
2873         }
2874         /*
2875          * Handle chip-reported errors, or continue on to handle PIO.
2876          */
2877         if (unlikely(port_cause & ERR_IRQ)) {
2878                 mv_err_intr(ap);
2879         } else if (!edma_was_enabled) {
2880                 struct ata_queued_cmd *qc = mv_get_active_qc(ap);
2881                 if (qc)
2882                         ata_bmdma_port_intr(ap, qc);
2883                 else
2884                         mv_unexpected_intr(ap, edma_was_enabled);
2885         }
2886 }
2887 
2888 /**
2889  *      mv_host_intr - Handle all interrupts on the given host controller
2890  *      @host: host specific structure
2891  *      @main_irq_cause: Main interrupt cause register for the chip.
2892  *
2893  *      LOCKING:
2894  *      Inherited from caller.
2895  */
2896 static int mv_host_intr(struct ata_host *host, u32 main_irq_cause)
2897 {
2898         struct mv_host_priv *hpriv = host->private_data;
2899         void __iomem *mmio = hpriv->base, *hc_mmio;
2900         unsigned int handled = 0, port;
2901 
2902         /* If asserted, clear the "all ports" IRQ coalescing bit */
2903         if (main_irq_cause & ALL_PORTS_COAL_DONE)
2904                 writel(~ALL_PORTS_COAL_IRQ, mmio + IRQ_COAL_CAUSE);
2905 
2906         for (port = 0; port < hpriv->n_ports; port++) {
2907                 struct ata_port *ap = host->ports[port];
2908                 unsigned int p, shift, hardport, port_cause;
2909 
2910                 MV_PORT_TO_SHIFT_AND_HARDPORT(port, shift, hardport);
2911                 /*
2912                  * Each hc within the host has its own hc_irq_cause register,
2913                  * where the interrupting ports bits get ack'd.
2914                  */
2915                 if (hardport == 0) {    /* first port on this hc ? */
2916                         u32 hc_cause = (main_irq_cause >> shift) & HC0_IRQ_PEND;
2917                         u32 port_mask, ack_irqs;
2918                         /*
2919                          * Skip this entire hc if nothing pending for any ports
2920                          */
2921                         if (!hc_cause) {
2922                                 port += MV_PORTS_PER_HC - 1;
2923                                 continue;
2924                         }
2925                         /*
2926                          * We don't need/want to read the hc_irq_cause register,
2927                          * because doing so hurts performance, and
2928                          * main_irq_cause already gives us everything we need.
2929                          *
2930                          * But we do have to *write* to the hc_irq_cause to ack
2931                          * the ports that we are handling this time through.
2932                          *
2933                          * This requires that we create a bitmap for those
2934                          * ports which interrupted us, and use that bitmap
2935                          * to ack (only) those ports via hc_irq_cause.
2936                          */
2937                         ack_irqs = 0;
2938                         if (hc_cause & PORTS_0_3_COAL_DONE)
2939                                 ack_irqs = HC_COAL_IRQ;
2940                         for (p = 0; p < MV_PORTS_PER_HC; ++p) {
2941                                 if ((port + p) >= hpriv->n_ports)
2942                                         break;
2943                                 port_mask = (DONE_IRQ | ERR_IRQ) << (p * 2);
2944                                 if (hc_cause & port_mask)
2945                                         ack_irqs |= (DMA_IRQ | DEV_IRQ) << p;
2946                         }
2947                         hc_mmio = mv_hc_base_from_port(mmio, port);
2948                         writelfl(~ack_irqs, hc_mmio + HC_IRQ_CAUSE);
2949                         handled = 1;
2950                 }
2951                 /*
2952                  * Handle interrupts signalled for this port:
2953                  */
2954                 port_cause = (main_irq_cause >> shift) & (DONE_IRQ | ERR_IRQ);
2955                 if (port_cause)
2956                         mv_port_intr(ap, port_cause);
2957         }
2958         return handled;
2959 }
2960 
2961 static int mv_pci_error(struct ata_host *host, void __iomem *mmio)
2962 {
2963         struct mv_host_priv *hpriv = host->private_data;
2964         struct ata_port *ap;
2965         struct ata_queued_cmd *qc;
2966         struct ata_eh_info *ehi;
2967         unsigned int i, err_mask, printed = 0;
2968         u32 err_cause;
2969 
2970         err_cause = readl(mmio + hpriv->irq_cause_offset);
2971 
2972         dev_err(host->dev, "PCI ERROR; PCI IRQ cause=0x%08x\n", err_cause);
2973 
2974         DPRINTK("All regs @ PCI error\n");
2975         mv_dump_all_regs(mmio, -1, to_pci_dev(host->dev));
2976 
2977         writelfl(0, mmio + hpriv->irq_cause_offset);
2978 
2979         for (i = 0; i < host->n_ports; i++) {
2980                 ap = host->ports[i];
2981                 if (!ata_link_offline(&ap->link)) {
2982                         ehi = &ap->link.eh_info;
2983                         ata_ehi_clear_desc(ehi);
2984                         if (!printed++)
2985                                 ata_ehi_push_desc(ehi,
2986                                         "PCI err cause 0x%08x", err_cause);
2987                         err_mask = AC_ERR_HOST_BUS;
2988                         ehi->action = ATA_EH_RESET;
2989                         qc = ata_qc_from_tag(ap, ap->link.active_tag);
2990                         if (qc)
2991                                 qc->err_mask |= err_mask;
2992                         else
2993                                 ehi->err_mask |= err_mask;
2994 
2995                         ata_port_freeze(ap);
2996                 }
2997         }
2998         return 1;       /* handled */
2999 }
3000 
3001 /**
3002  *      mv_interrupt - Main interrupt event handler
3003  *      @irq: unused
3004  *      @dev_instance: private data; in this case the host structure
3005  *
3006  *      Read the read only register to determine if any host
3007  *      controllers have pending interrupts.  If so, call lower level
3008  *      routine to handle.  Also check for PCI errors which are only
3009  *      reported here.
3010  *
3011  *      LOCKING:
3012  *      This routine holds the host lock while processing pending
3013  *      interrupts.
3014  */
3015 static irqreturn_t mv_interrupt(int irq, void *dev_instance)
3016 {
3017         struct ata_host *host = dev_instance;
3018         struct mv_host_priv *hpriv = host->private_data;
3019         unsigned int handled = 0;
3020         int using_msi = hpriv->hp_flags & MV_HP_FLAG_MSI;
3021         u32 main_irq_cause, pending_irqs;
3022 
3023         spin_lock(&host->lock);
3024 
3025         /* for MSI:  block new interrupts while in here */
3026         if (using_msi)
3027                 mv_write_main_irq_mask(0, hpriv);
3028 
3029         main_irq_cause = readl(hpriv->main_irq_cause_addr);
3030         pending_irqs   = main_irq_cause & hpriv->main_irq_mask;
3031         /*
3032          * Deal with cases where we either have nothing pending, or have read
3033          * a bogus register value which can indicate HW removal or PCI fault.
3034          */
3035         if (pending_irqs && main_irq_cause != 0xffffffffU) {
3036                 if (unlikely((pending_irqs & PCI_ERR) && !IS_SOC(hpriv)))
3037                         handled = mv_pci_error(host, hpriv->base);
3038                 else
3039                         handled = mv_host_intr(host, pending_irqs);
3040         }
3041 
3042         /* for MSI: unmask; interrupt cause bits will retrigger now */
3043         if (using_msi)
3044                 mv_write_main_irq_mask(hpriv->main_irq_mask, hpriv);
3045 
3046         spin_unlock(&host->lock);
3047 
3048         return IRQ_RETVAL(handled);
3049 }
3050 
3051 static unsigned int mv5_scr_offset(unsigned int sc_reg_in)
3052 {
3053         unsigned int ofs;
3054 
3055         switch (sc_reg_in) {
3056         case SCR_STATUS:
3057         case SCR_ERROR:
3058         case SCR_CONTROL:
3059                 ofs = sc_reg_in * sizeof(u32);
3060                 break;
3061         default:
3062                 ofs = 0xffffffffU;
3063                 break;
3064         }
3065         return ofs;
3066 }
3067 
3068 static int mv5_scr_read(struct ata_link *link, unsigned int sc_reg_in, u32 *val)
3069 {
3070         struct mv_host_priv *hpriv = link->ap->host->private_data;
3071         void __iomem *mmio = hpriv->base;
3072         void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no);
3073         unsigned int ofs = mv5_scr_offset(sc_reg_in);
3074 
3075         if (ofs != 0xffffffffU) {
3076                 *val = readl(addr + ofs);
3077                 return 0;
3078         } else
3079                 return -EINVAL;
3080 }
3081 
3082 static int mv5_scr_write(struct ata_link *link, unsigned int sc_reg_in, u32 val)
3083 {
3084         struct mv_host_priv *hpriv = link->ap->host->private_data;
3085         void __iomem *mmio = hpriv->base;
3086         void __iomem *addr = mv5_phy_base(mmio, link->ap->port_no);
3087         unsigned int ofs = mv5_scr_offset(sc_reg_in);
3088 
3089         if (ofs != 0xffffffffU) {
3090                 writelfl(val, addr + ofs);
3091                 return 0;
3092         } else
3093                 return -EINVAL;
3094 }
3095 
3096 static void mv5_reset_bus(struct ata_host *host, void __iomem *mmio)
3097 {
3098         struct pci_dev *pdev = to_pci_dev(host->dev);
3099         int early_5080;
3100 
3101         early_5080 = (pdev->device == 0x5080) && (pdev->revision == 0);
3102 
3103         if (!early_5080) {
3104                 u32 tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
3105                 tmp |= (1 << 0);
3106                 writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL);
3107         }
3108 
3109         mv_reset_pci_bus(host, mmio);
3110 }
3111 
3112 static void mv5_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
3113 {
3114         writel(0x0fcfffff, mmio + FLASH_CTL);
3115 }
3116 
3117 static void mv5_read_preamp(struct mv_host_priv *hpriv, int idx,
3118                            void __iomem *mmio)
3119 {
3120         void __iomem *phy_mmio = mv5_phy_base(mmio, idx);
3121         u32 tmp;
3122 
3123         tmp = readl(phy_mmio + MV5_PHY_MODE);
3124 
3125         hpriv->signal[idx].pre = tmp & 0x1800;  /* bits 12:11 */
3126         hpriv->signal[idx].amps = tmp & 0xe0;   /* bits 7:5 */
3127 }
3128 
3129 static void mv5_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
3130 {
3131         u32 tmp;
3132 
3133         writel(0, mmio + GPIO_PORT_CTL);
3134 
3135         /* FIXME: handle MV_HP_ERRATA_50XXB2 errata */
3136 
3137         tmp = readl(mmio + MV_PCI_EXP_ROM_BAR_CTL);
3138         tmp |= ~(1 << 0);
3139         writel(tmp, mmio + MV_PCI_EXP_ROM_BAR_CTL);
3140 }
3141 
3142 static void mv5_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
3143                            unsigned int port)
3144 {
3145         void __iomem *phy_mmio = mv5_phy_base(mmio, port);
3146         const u32 mask = (1<<12) | (1<<11) | (1<<7) | (1<<6) | (1<<5);
3147         u32 tmp;
3148         int fix_apm_sq = (hpriv->hp_flags & MV_HP_ERRATA_50XXB0);
3149 
3150         if (fix_apm_sq) {
3151                 tmp = readl(phy_mmio + MV5_LTMODE);
3152                 tmp |= (1 << 19);
3153                 writel(tmp, phy_mmio + MV5_LTMODE);
3154 
3155                 tmp = readl(phy_mmio + MV5_PHY_CTL);
3156                 tmp &= ~0x3;
3157                 tmp |= 0x1;
3158                 writel(tmp, phy_mmio + MV5_PHY_CTL);
3159         }
3160 
3161         tmp = readl(phy_mmio + MV5_PHY_MODE);
3162         tmp &= ~mask;
3163         tmp |= hpriv->signal[port].pre;
3164         tmp |= hpriv->signal[port].amps;
3165         writel(tmp, phy_mmio + MV5_PHY_MODE);
3166 }
3167 
3168 
3169 #undef ZERO
3170 #define ZERO(reg) writel(0, port_mmio + (reg))
3171 static void mv5_reset_hc_port(struct mv_host_priv *hpriv, void __iomem *mmio,
3172                              unsigned int port)
3173 {
3174         void __iomem *port_mmio = mv_port_base(mmio, port);
3175 
3176         mv_reset_channel(hpriv, mmio, port);
3177 
3178         ZERO(0x028);    /* command */
3179         writel(0x11f, port_mmio + EDMA_CFG);
3180         ZERO(0x004);    /* timer */
3181         ZERO(0x008);    /* irq err cause */
3182         ZERO(0x00c);    /* irq err mask */
3183         ZERO(0x010);    /* rq bah */
3184         ZERO(0x014);    /* rq inp */
3185         ZERO(0x018);    /* rq outp */
3186         ZERO(0x01c);    /* respq bah */
3187         ZERO(0x024);    /* respq outp */
3188         ZERO(0x020);    /* respq inp */
3189         ZERO(0x02c);    /* test control */
3190         writel(0xbc, port_mmio + EDMA_IORDY_TMOUT);
3191 }
3192 #undef ZERO
3193 
3194 #define ZERO(reg) writel(0, hc_mmio + (reg))
3195 static void mv5_reset_one_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
3196                         unsigned int hc)
3197 {
3198         void __iomem *hc_mmio = mv_hc_base(mmio, hc);
3199         u32 tmp;
3200 
3201         ZERO(0x00c);
3202         ZERO(0x010);
3203         ZERO(0x014);
3204         ZERO(0x018);
3205 
3206         tmp = readl(hc_mmio + 0x20);
3207         tmp &= 0x1c1c1c1c;
3208         tmp |= 0x03030303;
3209         writel(tmp, hc_mmio + 0x20);
3210 }
3211 #undef ZERO
3212 
3213 static int mv5_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
3214                         unsigned int n_hc)
3215 {
3216         unsigned int hc, port;
3217 
3218         for (hc = 0; hc < n_hc; hc++) {
3219                 for (port = 0; port < MV_PORTS_PER_HC; port++)
3220                         mv5_reset_hc_port(hpriv, mmio,
3221                                           (hc * MV_PORTS_PER_HC) + port);
3222 
3223                 mv5_reset_one_hc(hpriv, mmio, hc);
3224         }
3225 
3226         return 0;
3227 }
3228 
3229 #undef ZERO
3230 #define ZERO(reg) writel(0, mmio + (reg))
3231 static void mv_reset_pci_bus(struct ata_host *host, void __iomem *mmio)
3232 {
3233         struct mv_host_priv *hpriv = host->private_data;
3234         u32 tmp;
3235 
3236         tmp = readl(mmio + MV_PCI_MODE);
3237         tmp &= 0xff00ffff;
3238         writel(tmp, mmio + MV_PCI_MODE);
3239 
3240         ZERO(MV_PCI_DISC_TIMER);
3241         ZERO(MV_PCI_MSI_TRIGGER);
3242         writel(0x000100ff, mmio + MV_PCI_XBAR_TMOUT);
3243         ZERO(MV_PCI_SERR_MASK);
3244         ZERO(hpriv->irq_cause_offset);
3245         ZERO(hpriv->irq_mask_offset);
3246         ZERO(MV_PCI_ERR_LOW_ADDRESS);
3247         ZERO(MV_PCI_ERR_HIGH_ADDRESS);
3248         ZERO(MV_PCI_ERR_ATTRIBUTE);
3249         ZERO(MV_PCI_ERR_COMMAND);
3250 }
3251 #undef ZERO
3252 
3253 static void mv6_reset_flash(struct mv_host_priv *hpriv, void __iomem *mmio)
3254 {
3255         u32 tmp;
3256 
3257         mv5_reset_flash(hpriv, mmio);
3258 
3259         tmp = readl(mmio + GPIO_PORT_CTL);
3260         tmp &= 0x3;
3261         tmp |= (1 << 5) | (1 << 6);
3262         writel(tmp, mmio + GPIO_PORT_CTL);
3263 }
3264 
3265 /**
3266  *      mv6_reset_hc - Perform the 6xxx global soft reset
3267  *      @mmio: base address of the HBA
3268  *
3269  *      This routine only applies to 6xxx parts.
3270  *
3271  *      LOCKING:
3272  *      Inherited from caller.
3273  */
3274 static int mv6_reset_hc(struct mv_host_priv *hpriv, void __iomem *mmio,
3275                         unsigned int n_hc)
3276 {
3277         void __iomem *reg = mmio + PCI_MAIN_CMD_STS;
3278         int i, rc = 0;
3279         u32 t;
3280 
3281         /* Following procedure defined in PCI "main command and status
3282          * register" table.
3283          */
3284         t = readl(reg);
3285         writel(t | STOP_PCI_MASTER, reg);
3286 
3287         for (i = 0; i < 1000; i++) {
3288                 udelay(1);
3289                 t = readl(reg);
3290                 if (PCI_MASTER_EMPTY & t)
3291                         break;
3292         }
3293         if (!(PCI_MASTER_EMPTY & t)) {
3294                 printk(KERN_ERR DRV_NAME ": PCI master won't flush\n");
3295                 rc = 1;
3296                 goto done;
3297         }
3298 
3299         /* set reset */
3300         i = 5;
3301         do {
3302                 writel(t | GLOB_SFT_RST, reg);
3303                 t = readl(reg);
3304                 udelay(1);
3305         } while (!(GLOB_SFT_RST & t) && (i-- > 0));
3306 
3307         if (!(GLOB_SFT_RST & t)) {
3308                 printk(KERN_ERR DRV_NAME ": can't set global reset\n");
3309                 rc = 1;
3310                 goto done;
3311         }
3312 
3313         /* clear reset and *reenable the PCI master* (not mentioned in spec) */
3314         i = 5;
3315         do {
3316                 writel(t & ~(GLOB_SFT_RST | STOP_PCI_MASTER), reg);
3317                 t = readl(reg);
3318                 udelay(1);
3319         } while ((GLOB_SFT_RST & t) && (i-- > 0));
3320 
3321         if (GLOB_SFT_RST & t) {
3322                 printk(KERN_ERR DRV_NAME ": can't clear global reset\n");
3323                 rc = 1;
3324         }
3325 done:
3326         return rc;
3327 }
3328 
3329 static void mv6_read_preamp(struct mv_host_priv *hpriv, int idx,
3330                            void __iomem *mmio)
3331 {
3332         void __iomem *port_mmio;
3333         u32 tmp;
3334 
3335         tmp = readl(mmio + RESET_CFG);
3336         if ((tmp & (1 << 0)) == 0) {
3337                 hpriv->signal[idx].amps = 0x7 << 8;
3338                 hpriv->signal[idx].pre = 0x1 << 5;
3339                 return;
3340         }
3341 
3342         port_mmio = mv_port_base(mmio, idx);
3343         tmp = readl(port_mmio + PHY_MODE2);
3344 
3345         hpriv->signal[idx].amps = tmp & 0x700;  /* bits 10:8 */
3346         hpriv->signal[idx].pre = tmp & 0xe0;    /* bits 7:5 */
3347 }
3348 
3349 static void mv6_enable_leds(struct mv_host_priv *hpriv, void __iomem *mmio)
3350 {
3351         writel(0x00000060, mmio + GPIO_PORT_CTL);
3352 }
3353 
3354 static void mv6_phy_errata(struct mv_host_priv *hpriv, void __iomem *mmio,
3355                            unsigned int port)
3356 {
3357         void __iomem *port_mmio = mv_port_base(mmio, port);
3358 
3359         u32 hp_flags = hpriv->hp_flags;
3360         int fix_phy_mode2 =
3361                 hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
3362         int fix_phy_mode4 =
3363                 hp_flags & (MV_HP_ERRATA_60X1B2 | MV_HP_ERRATA_60X1C0);
3364         u32 m2, m3;
3365 
3366         if (fix_phy_mode2) {
3367                 m2 = readl(port_mmio + PHY_MODE2);
3368                 m2 &= ~(1 << 16);
3369                 m2 |= (1 << 31);
3370                 writel(m2, port_mmio + PHY_MODE2);
3371 
3372                 udelay(200);
3373 
3374                 m2 = readl(port_mmio + PHY_MODE2);
3375                 m2 &= ~((1 << 16) | (1 << 31));
3376                 writel(m2, port_mmio + PHY_MODE2);
3377 
3378                 udelay(200);
3379         }
3380 
3381         /*
3382          * Gen-II/IIe PHY_MODE3 errata RM#2:
3383          * Achieves better receiver noise performance than the h/w default:
3384          */
3385         m3 = readl(port_mmio + PHY_MODE3);
3386         m3 = (m3 & 0x1f) | (0x5555601 << 5);
3387 
3388         /* Guideline 88F5182 (GL# SATA-S11) */
3389         if (IS_SOC(hpriv))
3390                 m3 &= ~0x1c;
3391 
3392         if (fix_phy_mode4) {
3393                 u32 m4 = readl(port_mmio + PHY_MODE4);
3394                 /*
3395                  * Enforce reserved-bit restrictions on GenIIe devices only.
3396                  * For earlier chipsets, force only the internal config field
3397                  *  (workaround for errata FEr SATA#10 part 1).
3398                  */
3399                 if (IS_GEN_IIE(hpriv))
3400                         m4 = (m4 & ~PHY_MODE4_RSVD_ZEROS) | PHY_MODE4_RSVD_ONES;
3401                 else
3402                         m4 = (m4 & ~PHY_MODE4_CFG_MASK) | PHY_MODE4_CFG_VALUE;
3403                 writel(m4, port_mmio + PHY_MODE4);
3404         }
3405         /*
3406          * Workaround for 60x1-B2 errata SATA#13:
3407          * Any write to PHY_MODE4 (above) may corrupt PHY_MODE3,
3408          * so we must always rewrite PHY_MODE3 after PHY_MODE4.
3409          * Or ensure we use writelfl() when writing PHY_MODE4.
3410          */
3411         writel(m3, port_mmio + PHY_MODE3);
3412 
3413         /* Revert values of pre-emphasis and signal amps to the saved ones */
3414         m2 = readl(port_mmio + PHY_MODE2);
3415 
3416         m2 &= ~MV_M2_PREAMP_MASK;
3417         m2 |= hpriv->signal[port].amps;
3418         m2 |= hpriv->signal[port].pre;
3419         m2 &= ~(1 << 16);
3420 
3421         /* according to mvSata 3.6.1, some IIE values are fixed */
3422         if (IS_GEN_IIE(hpriv)) {
3423                 m2 &= ~0xC30FF01F;
3424                 m2 |= 0x0000900F;
3425         }
3426 
3427         writel(m2, port_mmio + PHY_MODE2);
3428 }
3429 
3430 /* TODO: use the generic LED interface to configure the SATA Presence */
3431 /* & Acitivy LEDs on the board */
3432 static void mv_soc_enable_leds(struct mv_host_priv *hpriv,
3433                                       void __iomem *mmio)
3434 {
3435         return;
3436 }
3437 
3438 static void mv_soc_read_preamp(struct mv_host_priv *hpriv, int idx,
3439                            void __iomem *mmio)
3440 {
3441         void __iomem *port_mmio;
3442         u32 tmp;
3443 
3444         port_mmio = mv_port_base(mmio, idx);
3445         tmp = readl(port_mmio + PHY_MODE2);
3446 
3447         hpriv->signal[idx].amps = tmp & 0x700;  /* bits 10:8 */
3448         hpriv->signal[idx].pre = tmp & 0xe0;    /* bits 7:5 */
3449 }
3450 
3451 #undef ZERO
3452 #define ZERO(reg) writel(0, port_mmio + (reg))
3453 static void mv_soc_reset_hc_port(struct mv_host_priv *hpriv,
3454                                         void __iomem *mmio, unsigned int port)
3455 {
3456         void __iomem *port_mmio = mv_port_base(mmio, port);
3457 
3458         mv_reset_channel(hpriv, mmio, port);
3459 
3460         ZERO(0x028);            /* command */
3461         writel(0x101f, port_mmio + EDMA_CFG);
3462         ZERO(0x004);            /* timer */
3463         ZERO(0x008);            /* irq err cause */
3464         ZERO(0x00c);            /* irq err mask */
3465         ZERO(0x010);            /* rq bah */
3466         ZERO(0x014);            /* rq inp */
3467         ZERO(0x018);            /* rq outp */
3468         ZERO(0x01c);            /* respq bah */
3469         ZERO(0x024);            /* respq outp */
3470         ZERO(0x020);            /* respq inp */
3471         ZERO(0x02c);            /* test control */
3472         writel(0x800, port_mmio + EDMA_IORDY_TMOUT);
3473 }
3474 
3475 #undef ZERO
3476 
3477 #define ZERO(reg) writel(0, hc_mmio + (reg))
3478 static void mv_soc_reset_one_hc(struct mv_host_priv *hpriv,
3479                                        void __iomem *mmio)
3480 {
3481         void __iomem *hc_mmio = mv_hc_base(mmio, 0);
3482 
3483         ZERO(0x00c);
3484         ZERO(0x010);
3485         ZERO(0x014);
3486 
3487 }
3488 
3489 #undef ZERO
3490 
3491 static int mv_soc_reset_hc(struct mv_host_priv *hpriv,
3492                                   void __iomem *mmio, unsigned int n_hc)
3493 {
3494         unsigned int port;
3495 
3496         for (port = 0; port < hpriv->n_ports; port++)
3497                 mv_soc_reset_hc_port(hpriv, mmio, port);
3498 
3499         mv_soc_reset_one_hc(hpriv, mmio);
3500 
3501         return 0;
3502 }
3503 
3504 static void mv_soc_reset_flash(struct mv_host_priv *hpriv,
3505                                       void __iomem *mmio)
3506 {
3507         return;
3508 }
3509 
3510 static void mv_soc_reset_bus(struct ata_host *host, void __iomem *mmio)
3511 {
3512         return;
3513 }
3514 
3515 static void mv_soc_65n_phy_errata(struct mv_host_priv *hpriv,
3516                                   void __iomem *mmio, unsigned int port)
3517 {
3518         void __iomem *port_mmio = mv_port_base(mmio, port);
3519         u32     reg;
3520 
3521         reg = readl(port_mmio + PHY_MODE3);
3522         reg &= ~(0x3 << 27);    /* SELMUPF (bits 28:27) to 1 */
3523         reg |= (0x1 << 27);
3524         reg &= ~(0x3 << 29);    /* SELMUPI (bits 30:29) to 1 */
3525         reg |= (0x1 << 29);
3526         writel(reg, port_mmio + PHY_MODE3);
3527 
3528         reg = readl(port_mmio + PHY_MODE4);
3529         reg &= ~0x1;    /* SATU_OD8 (bit 0) to 0, reserved bit 16 must be set */
3530         reg |= (0x1 << 16);
3531         writel(reg, port_mmio + PHY_MODE4);
3532 
3533         reg = readl(port_mmio + PHY_MODE9_GEN2);
3534         reg &= ~0xf;    /* TXAMP[3:0] (bits 3:0) to 8 */
3535         reg |= 0x8;
3536         reg &= ~(0x1 << 14);    /* TXAMP[4] (bit 14) to 0 */
3537         writel(reg, port_mmio + PHY_MODE9_GEN2);
3538 
3539         reg = readl(port_mmio + PHY_MODE9_GEN1);
3540         reg &= ~0xf;    /* TXAMP[3:0] (bits 3:0) to 8 */
3541         reg |= 0x8;
3542         reg &= ~(0x1 << 14);    /* TXAMP[4] (bit 14) to 0 */
3543         writel(reg, port_mmio + PHY_MODE9_GEN1);
3544 }
3545 
3546 /**
3547  *      soc_is_65 - check if the soc is 65 nano device
3548  *
3549  *      Detect the type of the SoC, this is done by reading the PHYCFG_OFS
3550  *      register, this register should contain non-zero value and it exists only
3551  *      in the 65 nano devices, when reading it from older devices we get 0.
3552  */
3553 static bool soc_is_65n(struct mv_host_priv *hpriv)
3554 {
3555         void __iomem *port0_mmio = mv_port_base(hpriv->base, 0);
3556 
3557         if (readl(port0_mmio + PHYCFG_OFS))
3558                 return true;
3559         return false;
3560 }
3561 
3562 static void mv_setup_ifcfg(void __iomem *port_mmio, int want_gen2i)
3563 {
3564         u32 ifcfg = readl(port_mmio + SATA_IFCFG);
3565 
3566         ifcfg = (ifcfg & 0xf7f) | 0x9b1000;     /* from chip spec */
3567         if (want_gen2i)
3568                 ifcfg |= (1 << 7);              /* enable gen2i speed */
3569         writelfl(ifcfg, port_mmio + SATA_IFCFG);
3570 }
3571 
3572 static void mv_reset_channel(struct mv_host_priv *hpriv, void __iomem *mmio,
3573                              unsigned int port_no)
3574 {
3575         void __iomem *port_mmio = mv_port_base(mmio, port_no);
3576 
3577         /*
3578          * The datasheet warns against setting EDMA_RESET when EDMA is active
3579          * (but doesn't say what the problem might be).  So we first try
3580          * to disable the EDMA engine before doing the EDMA_RESET operation.
3581          */
3582         mv_stop_edma_engine(port_mmio);
3583         writelfl(EDMA_RESET, port_mmio + EDMA_CMD);
3584 
3585         if (!IS_GEN_I(hpriv)) {
3586                 /* Enable 3.0gb/s link speed: this survives EDMA_RESET */
3587                 mv_setup_ifcfg(port_mmio, 1);
3588         }
3589         /*
3590          * Strobing EDMA_RESET here causes a hard reset of the SATA transport,
3591          * link, and physical layers.  It resets all SATA interface registers
3592          * (except for SATA_IFCFG), and issues a COMRESET to the dev.
3593          */
3594         writelfl(EDMA_RESET, port_mmio + EDMA_CMD);
3595         udelay(25);     /* allow reset propagation */
3596         writelfl(0, port_mmio + EDMA_CMD);
3597 
3598         hpriv->ops->phy_errata(hpriv, mmio, port_no);
3599 
3600         if (IS_GEN_I(hpriv))
3601                 mdelay(1);
3602 }
3603 
3604 static void mv_pmp_select(struct ata_port *ap, int pmp)
3605 {
3606         if (sata_pmp_supported(ap)) {
3607                 void __iomem *port_mmio = mv_ap_base(ap);
3608                 u32 reg = readl(port_mmio + SATA_IFCTL);
3609                 int old = reg & 0xf;
3610 
3611                 if (old != pmp) {
3612                         reg = (reg & ~0xf) | pmp;
3613                         writelfl(reg, port_mmio + SATA_IFCTL);
3614                 }
3615         }
3616 }
3617 
3618 static int mv_pmp_hardreset(struct ata_link *link, unsigned int *class,
3619                                 unsigned long deadline)
3620 {
3621         mv_pmp_select(link->ap, sata_srst_pmp(link));
3622         return sata_std_hardreset(link, class, deadline);
3623 }
3624 
3625 static int mv_softreset(struct ata_link *link, unsigned int *class,
3626                                 unsigned long deadline)
3627 {
3628         mv_pmp_select(link->ap, sata_srst_pmp(link));
3629         return ata_sff_softreset(link, class, deadline);
3630 }
3631 
3632 static int mv_hardreset(struct ata_link *link, unsigned int *class,
3633                         unsigned long deadline)
3634 {
3635         struct ata_port *ap = link->ap;
3636         struct mv_host_priv *hpriv = ap->host->private_data;
3637         struct mv_port_priv *pp = ap->private_data;
3638         void __iomem *mmio = hpriv->base;
3639         int rc, attempts = 0, extra = 0;
3640         u32 sstatus;
3641         bool online;
3642 
3643         mv_reset_channel(hpriv, mmio, ap->port_no);
3644         pp->pp_flags &= ~MV_PP_FLAG_EDMA_EN;
3645         pp->pp_flags &=
3646           ~(MV_PP_FLAG_FBS_EN | MV_PP_FLAG_NCQ_EN | MV_PP_FLAG_FAKE_ATA_BUSY);
3647 
3648         /* Workaround for errata FEr SATA#10 (part 2) */
3649         do {
3650                 const unsigned long *timing =
3651                                 sata_ehc_deb_timing(&link->eh_context);
3652 
3653                 rc = sata_link_hardreset(link, timing, deadline + extra,
3654                                          &online, NULL);
3655                 rc = online ? -EAGAIN : rc;
3656                 if (rc)
3657                         return rc;
3658                 sata_scr_read(link, SCR_STATUS, &sstatus);
3659                 if (!IS_GEN_I(hpriv) && ++attempts >= 5 && sstatus == 0x121) {
3660                         /* Force 1.5gb/s link speed and try again */
3661                         mv_setup_ifcfg(mv_ap_base(ap), 0);
3662                         if (time_after(jiffies + HZ, deadline))
3663                                 extra = HZ; /* only extend it once, max */
3664                 }
3665         } while (sstatus != 0x0 && sstatus != 0x113 && sstatus != 0x123);
3666         mv_save_cached_regs(ap);
3667         mv_edma_cfg(ap, 0, 0);
3668 
3669         return rc;
3670 }
3671 
3672 static void mv_eh_freeze(struct ata_port *ap)
3673 {
3674         mv_stop_edma(ap);
3675         mv_enable_port_irqs(ap, 0);
3676 }
3677 
3678 static void mv_eh_thaw(struct ata_port *ap)
3679 {
3680         struct mv_host_priv *hpriv = ap->host->private_data;
3681         unsigned int port = ap->port_no;
3682         unsigned int hardport = mv_hardport_from_port(port);
3683         void __iomem *hc_mmio = mv_hc_base_from_port(hpriv->base, port);
3684         void __iomem *port_mmio = mv_ap_base(ap);
3685         u32 hc_irq_cause;
3686 
3687         /* clear EDMA errors on this port */
3688         writel(0, port_mmio + EDMA_ERR_IRQ_CAUSE);
3689 
3690         /* clear pending irq events */
3691         hc_irq_cause = ~((DEV_IRQ | DMA_IRQ) << hardport);
3692         writelfl(hc_irq_cause, hc_mmio + HC_IRQ_CAUSE);
3693 
3694         mv_enable_port_irqs(ap, ERR_IRQ);
3695 }
3696 
3697 /**
3698  *      mv_port_init - Perform some early initialization on a single port.
3699  *      @port: libata data structure storing shadow register addresses
3700  *      @port_mmio: base address of the port
3701  *
3702  *      Initialize shadow register mmio addresses, clear outstanding
3703  *      interrupts on the port, and unmask interrupts for the future
3704  *      start of the port.
3705  *
3706  *      LOCKING:
3707  *      Inherited from caller.
3708  */
3709 static void mv_port_init(struct ata_ioports *port,  void __iomem *port_mmio)
3710 {
3711         void __iomem *serr, *shd_base = port_mmio + SHD_BLK;
3712 
3713         /* PIO related setup
3714          */
3715         port->data_addr = shd_base + (sizeof(u32) * ATA_REG_DATA);
3716         port->error_addr =
3717                 port->feature_addr = shd_base + (sizeof(u32) * ATA_REG_ERR);
3718         port->nsect_addr = shd_base + (sizeof(u32) * ATA_REG_NSECT);
3719         port->lbal_addr = shd_base + (sizeof(u32) * ATA_REG_LBAL);
3720         port->lbam_addr = shd_base + (sizeof(u32) * ATA_REG_LBAM);
3721         port->lbah_addr = shd_base + (sizeof(u32) * ATA_REG_LBAH);
3722         port->device_addr = shd_base + (sizeof(u32) * ATA_REG_DEVICE);
3723         port->status_addr =
3724                 port->command_addr = shd_base + (sizeof(u32) * ATA_REG_STATUS);
3725         /* special case: control/altstatus doesn't have ATA_REG_ address */
3726         port->altstatus_addr = port->ctl_addr = shd_base + SHD_CTL_AST;
3727 
3728         /* Clear any currently outstanding port interrupt conditions */
3729         serr = port_mmio + mv_scr_offset(SCR_ERROR);
3730         writelfl(readl(serr), serr);
3731         writelfl(0, port_mmio + EDMA_ERR_IRQ_CAUSE);
3732 
3733         /* unmask all non-transient EDMA error interrupts */
3734         writelfl(~EDMA_ERR_IRQ_TRANSIENT, port_mmio + EDMA_ERR_IRQ_MASK);
3735 
3736         VPRINTK("EDMA cfg=0x%08x EDMA IRQ err cause/mask=0x%08x/0x%08x\n",
3737                 readl(port_mmio + EDMA_CFG),
3738                 readl(port_mmio + EDMA_ERR_IRQ_CAUSE),
3739                 readl(port_mmio + EDMA_ERR_IRQ_MASK));
3740 }
3741 
3742 static unsigned int mv_in_pcix_mode(struct ata_host *host)
3743 {
3744         struct mv_host_priv *hpriv = host->private_data;
3745         void __iomem *mmio = hpriv->base;
3746         u32 reg;
3747 
3748         if (IS_SOC(hpriv) || !IS_PCIE(hpriv))
3749                 return 0;       /* not PCI-X capable */
3750         reg = readl(mmio + MV_PCI_MODE);
3751         if ((reg & MV_PCI_MODE_MASK) == 0)
3752                 return 0;       /* conventional PCI mode */
3753         return 1;       /* chip is in PCI-X mode */
3754 }
3755 
3756 static int mv_pci_cut_through_okay(struct ata_host *host)
3757 {
3758         struct mv_host_priv *hpriv = host->private_data;
3759         void __iomem *mmio = hpriv->base;
3760         u32 reg;
3761 
3762         if (!mv_in_pcix_mode(host)) {
3763                 reg = readl(mmio + MV_PCI_COMMAND);
3764                 if (reg & MV_PCI_COMMAND_MRDTRIG)
3765                         return 0; /* not okay */
3766         }
3767         return 1; /* okay */
3768 }
3769 
3770 static void mv_60x1b2_errata_pci7(struct ata_host *host)
3771 {
3772         struct mv_host_priv *hpriv = host->private_data;
3773         void __iomem *mmio = hpriv->base;
3774 
3775         /* workaround for 60x1-B2 errata PCI#7 */
3776         if (mv_in_pcix_mode(host)) {
3777                 u32 reg = readl(mmio + MV_PCI_COMMAND);
3778                 writelfl(reg & ~MV_PCI_COMMAND_MWRCOM, mmio + MV_PCI_COMMAND);
3779         }
3780 }
3781 
3782 static int mv_chip_id(struct ata_host *host, unsigned int board_idx)
3783 {
3784         struct pci_dev *pdev = to_pci_dev(host->dev);
3785         struct mv_host_priv *hpriv = host->private_data;
3786         u32 hp_flags = hpriv->hp_flags;
3787 
3788         switch (board_idx) {
3789         case chip_5080:
3790                 hpriv->ops = &mv5xxx_ops;
3791                 hp_flags |= MV_HP_GEN_I;
3792 
3793                 switch (pdev->revision) {
3794                 case 0x1:
3795                         hp_flags |= MV_HP_ERRATA_50XXB0;
3796                         break;
3797                 case 0x3:
3798                         hp_flags |= MV_HP_ERRATA_50XXB2;
3799                         break;
3800                 default:
3801                         dev_warn(&pdev->dev,
3802                                  "Applying 50XXB2 workarounds to unknown rev\n");
3803                         hp_flags |= MV_HP_ERRATA_50XXB2;
3804                         break;
3805                 }
3806                 break;
3807 
3808         case chip_504x:
3809         case chip_508x:
3810                 hpriv->ops = &mv5xxx_ops;
3811                 hp_flags |= MV_HP_GEN_I;
3812 
3813                 switch (pdev->revision) {
3814                 case 0x0:
3815                         hp_flags |= MV_HP_ERRATA_50XXB0;
3816                         break;
3817                 case 0x3:
3818                         hp_flags |= MV_HP_ERRATA_50XXB2;
3819                         break;
3820                 default:
3821                         dev_warn(&pdev->dev,
3822                                  "Applying B2 workarounds to unknown rev\n");
3823                         hp_flags |= MV_HP_ERRATA_50XXB2;
3824                         break;
3825                 }
3826                 break;
3827 
3828         case chip_604x:
3829         case chip_608x:
3830                 hpriv->ops = &mv6xxx_ops;
3831                 hp_flags |= MV_HP_GEN_II;
3832 
3833                 switch (pdev->revision) {
3834                 case 0x7:
3835                         mv_60x1b2_errata_pci7(host);
3836                         hp_flags |= MV_HP_ERRATA_60X1B2;
3837                         break;
3838                 case 0x9:
3839                         hp_flags |= MV_HP_ERRATA_60X1C0;
3840                         break;
3841                 default:
3842                         dev_warn(&pdev->dev,
3843                                  "Applying B2 workarounds to unknown rev\n");
3844                         hp_flags |= MV_HP_ERRATA_60X1B2;
3845                         break;
3846                 }
3847                 break;
3848 
3849         case chip_7042:
3850                 hp_flags |= MV_HP_PCIE | MV_HP_CUT_THROUGH;
3851                 if (pdev->vendor == PCI_VENDOR_ID_TTI &&
3852                     (pdev->device == 0x2300 || pdev->device == 0x2310))
3853                 {
3854                         /*
3855                          * Highpoint RocketRAID PCIe 23xx series cards:
3856                          *
3857                          * Unconfigured drives are treated as "Legacy"
3858                          * by the BIOS, and it overwrites sector 8 with
3859                          * a "Lgcy" metadata block prior to Linux boot.
3860                          *
3861                          * Configured drives (RAID or JBOD) leave sector 8
3862                          * alone, but instead overwrite a high numbered
3863                          * sector for the RAID metadata.  This sector can
3864                          * be determined exactly, by truncating the physical
3865                          * drive capacity to a nice even GB value.
3866                          *
3867                          * RAID metadata is at: (dev->n_sectors & ~0xfffff)
3868                          *
3869                          * Warn the user, lest they think we're just buggy.
3870                          */
3871                         printk(KERN_WARNING DRV_NAME ": Highpoint RocketRAID"
3872                                 " BIOS CORRUPTS DATA on all attached drives,"
3873                                 " regardless of if/how they are configured."
3874                                 " BEWARE!\n");
3875                         printk(KERN_WARNING DRV_NAME ": For data safety, do not"
3876                                 " use sectors 8-9 on \"Legacy\" drives,"
3877                                 " and avoid the final two gigabytes on"
3878                                 " all RocketRAID BIOS initialized drives.\n");
3879                 }
3880                 /* drop through */
3881         case chip_6042:
3882                 hpriv->ops = &mv6xxx_ops;
3883                 hp_flags |= MV_HP_GEN_IIE;
3884                 if (board_idx == chip_6042 && mv_pci_cut_through_okay(host))
3885                         hp_flags |= MV_HP_CUT_THROUGH;
3886 
3887                 switch (pdev->revision) {
3888                 case 0x2: /* Rev.B0: the first/only public release */
3889                         hp_flags |= MV_HP_ERRATA_60X1C0;
3890                         break;
3891                 default:
3892                         dev_warn(&pdev->dev,
3893                                  "Applying 60X1C0 workarounds to unknown rev\n");
3894                         hp_flags |= MV_HP_ERRATA_60X1C0;
3895                         break;
3896                 }
3897                 break;
3898         case chip_soc:
3899                 if (soc_is_65n(hpriv))
3900                         hpriv->ops = &mv_soc_65n_ops;
3901                 else
3902                         hpriv->ops = &mv_soc_ops;
3903                 hp_flags |= MV_HP_FLAG_SOC | MV_HP_GEN_IIE |
3904                         MV_HP_ERRATA_60X1C0;
3905                 break;
3906 
3907         default:
3908                 dev_err(host->dev, "BUG: invalid board index %u\n", board_idx);
3909                 return 1;
3910         }
3911 
3912         hpriv->hp_flags = hp_flags;
3913         if (hp_flags & MV_HP_PCIE) {
3914                 hpriv->irq_cause_offset = PCIE_IRQ_CAUSE;
3915                 hpriv->irq_mask_offset  = PCIE_IRQ_MASK;
3916                 hpriv->unmask_all_irqs  = PCIE_UNMASK_ALL_IRQS;
3917         } else {
3918                 hpriv->irq_cause_offset = PCI_IRQ_CAUSE;
3919                 hpriv->irq_mask_offset  = PCI_IRQ_MASK;
3920                 hpriv->unmask_all_irqs  = PCI_UNMASK_ALL_IRQS;
3921         }
3922 
3923         return 0;
3924 }
3925 
3926 /**
3927  *      mv_init_host - Perform some early initialization of the host.
3928  *      @host: ATA host to initialize
3929  *
3930  *      If possible, do an early global reset of the host.  Then do
3931  *      our port init and clear/unmask all/relevant host interrupts.
3932  *
3933  *      LOCKING:
3934  *      Inherited from caller.
3935  */
3936 static int mv_init_host(struct ata_host *host)
3937 {
3938         int rc = 0, n_hc, port, hc;
3939         struct mv_host_priv *hpriv = host->private_data;
3940         void __iomem *mmio = hpriv->base;
3941 
3942         rc = mv_chip_id(host, hpriv->board_idx);
3943         if (rc)
3944                 goto done;
3945 
3946         if (IS_SOC(hpriv)) {
3947                 hpriv->main_irq_cause_addr = mmio + SOC_HC_MAIN_IRQ_CAUSE;
3948                 hpriv->main_irq_mask_addr  = mmio + SOC_HC_MAIN_IRQ_MASK;
3949         } else {
3950                 hpriv->main_irq_cause_addr = mmio + PCI_HC_MAIN_IRQ_CAUSE;
3951                 hpriv->main_irq_mask_addr  = mmio + PCI_HC_MAIN_IRQ_MASK;
3952         }
3953 
3954         /* initialize shadow irq mask with register's value */
3955         hpriv->main_irq_mask = readl(hpriv->main_irq_mask_addr);
3956 
3957         /* global interrupt mask: 0 == mask everything */
3958         mv_set_main_irq_mask(host, ~0, 0);
3959 
3960         n_hc = mv_get_hc_count(host->ports[0]->flags);
3961 
3962         for (port = 0; port < host->n_ports; port++)
3963                 if (hpriv->ops->read_preamp)
3964                         hpriv->ops->read_preamp(hpriv, port, mmio);
3965 
3966         rc = hpriv->ops->reset_hc(hpriv, mmio, n_hc);
3967         if (rc)
3968                 goto done;
3969 
3970         hpriv->ops->reset_flash(hpriv, mmio);
3971         hpriv->ops->reset_bus(host, mmio);
3972         hpriv->ops->enable_leds(hpriv, mmio);
3973 
3974         for (port = 0; port < host->n_ports; port++) {
3975                 struct ata_port *ap = host->ports[port];
3976                 void __iomem *port_mmio = mv_port_base(mmio, port);
3977 
3978                 mv_port_init(&ap->ioaddr, port_mmio);
3979         }
3980 
3981         for (hc = 0; hc < n_hc; hc++) {
3982                 void __iomem *hc_mmio = mv_hc_base(mmio, hc);
3983 
3984                 VPRINTK("HC%i: HC config=0x%08x HC IRQ cause "
3985                         "(before clear)=0x%08x\n", hc,
3986                         readl(hc_mmio + HC_CFG),
3987                         readl(hc_mmio + HC_IRQ_CAUSE));
3988 
3989                 /* Clear any currently outstanding hc interrupt conditions */
3990                 writelfl(0, hc_mmio + HC_IRQ_CAUSE);
3991         }
3992 
3993         if (!IS_SOC(hpriv)) {
3994                 /* Clear any currently outstanding host interrupt conditions */
3995                 writelfl(0, mmio + hpriv->irq_cause_offset);
3996 
3997                 /* and unmask interrupt generation for host regs */
3998                 writelfl(hpriv->unmask_all_irqs, mmio + hpriv->irq_mask_offset);
3999         }
4000 
4001         /*
4002          * enable only global host interrupts for now.
4003          * The per-port interrupts get done later as ports are set up.
4004          */
4005         mv_set_main_irq_mask(host, 0, PCI_ERR);
4006         mv_set_irq_coalescing(host, irq_coalescing_io_count,
4007                                     irq_coalescing_usecs);
4008 done:
4009         return rc;
4010 }
4011 
4012 static int mv_create_dma_pools(struct mv_host_priv *hpriv, struct device *dev)
4013 {
4014         hpriv->crqb_pool   = dmam_pool_create("crqb_q", dev, MV_CRQB_Q_SZ,
4015                                                              MV_CRQB_Q_SZ, 0);
4016         if (!hpriv->crqb_pool)
4017                 return -ENOMEM;
4018 
4019         hpriv->crpb_pool   = dmam_pool_create("crpb_q", dev, MV_CRPB_Q_SZ,
4020                                                              MV_CRPB_Q_SZ, 0);
4021         if (!hpriv->crpb_pool)
4022                 return -ENOMEM;
4023 
4024         hpriv->sg_tbl_pool = dmam_pool_create("sg_tbl", dev, MV_SG_TBL_SZ,
4025                                                              MV_SG_TBL_SZ, 0);
4026         if (!hpriv->sg_tbl_pool)
4027                 return -ENOMEM;
4028 
4029         return 0;
4030 }
4031 
4032 static void mv_conf_mbus_windows(struct mv_host_priv *hpriv,
4033                                  const struct mbus_dram_target_info *dram)
4034 {
4035         int i;
4036 
4037         for (i = 0; i < 4; i++) {
4038                 writel(0, hpriv->base + WINDOW_CTRL(i));
4039                 writel(0, hpriv->base + WINDOW_BASE(i));
4040         }
4041 
4042         for (i = 0; i < dram->num_cs; i++) {
4043                 const struct mbus_dram_window *cs = dram->cs + i;
4044 
4045                 writel(((cs->size - 1) & 0xffff0000) |
4046                         (cs->mbus_attr << 8) |
4047                         (dram->mbus_dram_target_id << 4) | 1,
4048                         hpriv->base + WINDOW_CTRL(i));
4049                 writel(cs->base, hpriv->base + WINDOW_BASE(i));
4050         }
4051 }
4052 
4053 /**
4054  *      mv_platform_probe - handle a positive probe of an soc Marvell
4055  *      host
4056  *      @pdev: platform device found
4057  *
4058  *      LOCKING:
4059  *      Inherited from caller.
4060  */
4061 static int mv_platform_probe(struct platform_device *pdev)
4062 {
4063         const struct mv_sata_platform_data *mv_platform_data;
4064         const struct mbus_dram_target_info *dram;
4065         const struct ata_port_info *ppi[] =
4066             { &mv_port_info[chip_soc], NULL };
4067         struct ata_host *host;
4068         struct mv_host_priv *hpriv;
4069         struct resource *res;
4070         int n_ports = 0, irq = 0;
4071         int rc;
4072         int port;
4073 
4074         ata_print_version_once(&pdev->dev, DRV_VERSION);
4075 
4076         /*
4077          * Simple resource validation ..
4078          */
4079         if (unlikely(pdev->num_resources != 2)) {
4080                 dev_err(&pdev->dev, "invalid number of resources\n");
4081                 return -EINVAL;
4082         }
4083 
4084         /*
4085          * Get the register base first
4086          */
4087         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
4088         if (res == NULL)
4089                 return -EINVAL;
4090 
4091         /* allocate host */
4092         if (pdev->dev.of_node) {
4093                 rc = of_property_read_u32(pdev->dev.of_node, "nr-ports",
4094                                            &n_ports);
4095                 if (rc) {
4096                         dev_err(&pdev->dev,
4097                                 "error parsing nr-ports property: %d\n", rc);
4098                         return rc;
4099                 }
4100 
4101                 if (n_ports <= 0) {
4102                         dev_err(&pdev->dev, "nr-ports must be positive: %d\n",
4103                                 n_ports);
4104                         return -EINVAL;
4105                 }
4106 
4107                 irq = irq_of_parse_and_map(pdev->dev.of_node, 0);
4108         } else {
4109                 mv_platform_data = dev_get_platdata(&pdev->dev);
4110                 n_ports = mv_platform_data->n_ports;
4111                 irq = platform_get_irq(pdev, 0);
4112         }
4113 
4114         host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
4115         hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
4116 
4117         if (!host || !hpriv)
4118                 return -ENOMEM;
4119         hpriv->port_clks = devm_kzalloc(&pdev->dev,
4120                                         sizeof(struct clk *) * n_ports,
4121                                         GFP_KERNEL);
4122         if (!hpriv->port_clks)
4123                 return -ENOMEM;
4124         hpriv->port_phys = devm_kzalloc(&pdev->dev,
4125                                         sizeof(struct phy *) * n_ports,
4126                                         GFP_KERNEL);
4127         if (!hpriv->port_phys)
4128                 return -ENOMEM;
4129         host->private_data = hpriv;
4130         hpriv->board_idx = chip_soc;
4131 
4132         host->iomap = NULL;
4133         hpriv->base = devm_ioremap(&pdev->dev, res->start,
4134                                    resource_size(res));
4135         if (!hpriv->base)
4136                 return -ENOMEM;
4137 
4138         hpriv->base -= SATAHC0_REG_BASE;
4139 
4140         hpriv->clk = clk_get(&pdev->dev, NULL);
4141         if (IS_ERR(hpriv->clk))
4142                 dev_notice(&pdev->dev, "cannot get optional clkdev\n");
4143         else
4144                 clk_prepare_enable(hpriv->clk);
4145 
4146         for (port = 0; port < n_ports; port++) {
4147                 char port_number[16];
4148                 sprintf(port_number, "%d", port);
4149                 hpriv->port_clks[port] = clk_get(&pdev->dev, port_number);
4150                 if (!IS_ERR(hpriv->port_clks[port]))
4151                         clk_prepare_enable(hpriv->port_clks[port]);
4152 
4153                 sprintf(port_number, "port%d", port);
4154                 hpriv->port_phys[port] = devm_phy_optional_get(&pdev->dev,
4155                                                                port_number);
4156                 if (IS_ERR(hpriv->port_phys[port])) {
4157                         rc = PTR_ERR(hpriv->port_phys[port]);
4158                         hpriv->port_phys[port] = NULL;
4159                         if (rc != -EPROBE_DEFER)
4160                                 dev_warn(&pdev->dev, "error getting phy %d", rc);
4161 
4162                         /* Cleanup only the initialized ports */
4163                         hpriv->n_ports = port;
4164                         goto err;
4165                 } else
4166                         phy_power_on(hpriv->port_phys[port]);
4167         }
4168 
4169         /* All the ports have been initialized */
4170         hpriv->n_ports = n_ports;
4171 
4172         /*
4173          * (Re-)program MBUS remapping windows if we are asked to.
4174          */
4175         dram = mv_mbus_dram_info();
4176         if (dram)
4177                 mv_conf_mbus_windows(hpriv, dram);
4178 
4179         rc = mv_create_dma_pools(hpriv, &pdev->dev);
4180         if (rc)
4181                 goto err;
4182 
4183         /*
4184          * To allow disk hotplug on Armada 370/XP SoCs, the PHY speed must be
4185          * updated in the LP_PHY_CTL register.
4186          */
4187         if (pdev->dev.of_node &&
4188                 of_device_is_compatible(pdev->dev.of_node,
4189                                         "marvell,armada-370-sata"))
4190                 hpriv->hp_flags |= MV_HP_FIX_LP_PHY_CTL;
4191 
4192         /* initialize adapter */
4193         rc = mv_init_host(host);
4194         if (rc)
4195                 goto err;
4196 
4197         dev_info(&pdev->dev, "slots %u ports %d\n",
4198                  (unsigned)MV_MAX_Q_DEPTH, host->n_ports);
4199 
4200         rc = ata_host_activate(host, irq, mv_interrupt, IRQF_SHARED, &mv6_sht);
4201         if (!rc)
4202                 return 0;
4203 
4204 err:
4205         if (!IS_ERR(hpriv->clk)) {
4206                 clk_disable_unprepare(hpriv->clk);
4207                 clk_put(hpriv->clk);
4208         }
4209         for (port = 0; port < hpriv->n_ports; port++) {
4210                 if (!IS_ERR(hpriv->port_clks[port])) {
4211                         clk_disable_unprepare(hpriv->port_clks[port]);
4212                         clk_put(hpriv->port_clks[port]);
4213                 }
4214                 phy_power_off(hpriv->port_phys[port]);
4215         }
4216 
4217         return rc;
4218 }
4219 
4220 /*
4221  *
4222  *      mv_platform_remove    -       unplug a platform interface
4223  *      @pdev: platform device
4224  *
4225  *      A platform bus SATA device has been unplugged. Perform the needed
4226  *      cleanup. Also called on module unload for any active devices.
4227  */
4228 static int mv_platform_remove(struct platform_device *pdev)
4229 {
4230         struct ata_host *host = platform_get_drvdata(pdev);
4231         struct mv_host_priv *hpriv = host->private_data;
4232         int port;
4233         ata_host_detach(host);
4234 
4235         if (!IS_ERR(hpriv->clk)) {
4236                 clk_disable_unprepare(hpriv->clk);
4237                 clk_put(hpriv->clk);
4238         }
4239         for (port = 0; port < host->n_ports; port++) {
4240                 if (!IS_ERR(hpriv->port_clks[port])) {
4241                         clk_disable_unprepare(hpriv->port_clks[port]);
4242                         clk_put(hpriv->port_clks[port]);
4243                 }
4244                 phy_power_off(hpriv->port_phys[port]);
4245         }
4246         return 0;
4247 }
4248 
4249 #ifdef CONFIG_PM_SLEEP
4250 static int mv_platform_suspend(struct platform_device *pdev, pm_message_t state)
4251 {
4252         struct ata_host *host = platform_get_drvdata(pdev);
4253         if (host)
4254                 return ata_host_suspend(host, state);
4255         else
4256                 return 0;
4257 }
4258 
4259 static int mv_platform_resume(struct platform_device *pdev)
4260 {
4261         struct ata_host *host = platform_get_drvdata(pdev);
4262         const struct mbus_dram_target_info *dram;
4263         int ret;
4264 
4265         if (host) {
4266                 struct mv_host_priv *hpriv = host->private_data;
4267 
4268                 /*
4269                  * (Re-)program MBUS remapping windows if we are asked to.
4270                  */
4271                 dram = mv_mbus_dram_info();
4272                 if (dram)
4273                         mv_conf_mbus_windows(hpriv, dram);
4274 
4275                 /* initialize adapter */
4276                 ret = mv_init_host(host);
4277                 if (ret) {
4278                         printk(KERN_ERR DRV_NAME ": Error during HW init\n");
4279                         return ret;
4280                 }
4281                 ata_host_resume(host);
4282         }
4283 
4284         return 0;
4285 }
4286 #else
4287 #define mv_platform_suspend NULL
4288 #define mv_platform_resume NULL
4289 #endif
4290 
4291 #ifdef CONFIG_OF
4292 static struct of_device_id mv_sata_dt_ids[] = {
4293         { .compatible = "marvell,armada-370-sata", },
4294         { .compatible = "marvell,orion-sata", },
4295         {},
4296 };
4297 MODULE_DEVICE_TABLE(of, mv_sata_dt_ids);
4298 #endif
4299 
4300 static struct platform_driver mv_platform_driver = {
4301         .probe          = mv_platform_probe,
4302         .remove         = mv_platform_remove,
4303         .suspend        = mv_platform_suspend,
4304         .resume         = mv_platform_resume,
4305         .driver         = {
4306                 .name = DRV_NAME,
4307                 .of_match_table = of_match_ptr(mv_sata_dt_ids),
4308         },
4309 };
4310 
4311 
4312 #ifdef CONFIG_PCI
4313 static int mv_pci_init_one(struct pci_dev *pdev,
4314                            const struct pci_device_id *ent);
4315 #ifdef CONFIG_PM_SLEEP
4316 static int mv_pci_device_resume(struct pci_dev *pdev);
4317 #endif
4318 
4319 
4320 static struct pci_driver mv_pci_driver = {
4321         .name                   = DRV_NAME,
4322         .id_table               = mv_pci_tbl,
4323         .probe                  = mv_pci_init_one,
4324         .remove                 = ata_pci_remove_one,
4325 #ifdef CONFIG_PM_SLEEP
4326         .suspend                = ata_pci_device_suspend,
4327         .resume                 = mv_pci_device_resume,
4328 #endif
4329 
4330 };
4331 
4332 /* move to PCI layer or libata core? */
4333 static int pci_go_64(struct pci_dev *pdev)
4334 {
4335         int rc;
4336 
4337         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
4338                 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
4339                 if (rc) {
4340                         rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
4341                         if (rc) {
4342                                 dev_err(&pdev->dev,
4343                                         "64-bit DMA enable failed\n");
4344                                 return rc;
4345                         }
4346                 }
4347         } else {
4348                 rc = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
4349                 if (rc) {
4350                         dev_err(&pdev->dev, "32-bit DMA enable failed\n");
4351                         return rc;
4352                 }
4353                 rc = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
4354                 if (rc) {
4355                         dev_err(&pdev->dev,
4356                                 "32-bit consistent DMA enable failed\n");
4357                         return rc;
4358                 }
4359         }
4360 
4361         return rc;
4362 }
4363 
4364 /**
4365  *      mv_print_info - Dump key info to kernel log for perusal.
4366  *      @host: ATA host to print info about
4367  *
4368  *      FIXME: complete this.
4369  *
4370  *      LOCKING:
4371  *      Inherited from caller.
4372  */
4373 static void mv_print_info(struct ata_host *host)
4374 {
4375         struct pci_dev *pdev = to_pci_dev(host->dev);
4376         struct mv_host_priv *hpriv = host->private_data;
4377         u8 scc;
4378         const char *scc_s, *gen;
4379 
4380         /* Use this to determine the HW stepping of the chip so we know
4381          * what errata to workaround
4382          */
4383         pci_read_config_byte(pdev, PCI_CLASS_DEVICE, &scc);
4384         if (scc == 0)
4385                 scc_s = "SCSI";
4386         else if (scc == 0x01)
4387                 scc_s = "RAID";
4388         else
4389                 scc_s = "?";
4390 
4391         if (IS_GEN_I(hpriv))
4392                 gen = "I";
4393         else if (IS_GEN_II(hpriv))
4394                 gen = "II";
4395         else if (IS_GEN_IIE(hpriv))
4396                 gen = "IIE";
4397         else
4398                 gen = "?";
4399 
4400         dev_info(&pdev->dev, "Gen-%s %u slots %u ports %s mode IRQ via %s\n",
4401                  gen, (unsigned)MV_MAX_Q_DEPTH, host->n_ports,
4402                  scc_s, (MV_HP_FLAG_MSI & hpriv->hp_flags) ? "MSI" : "INTx");
4403 }
4404 
4405 /**
4406  *      mv_pci_init_one - handle a positive probe of a PCI Marvell host
4407  *      @pdev: PCI device found
4408  *      @ent: PCI device ID entry for the matched host
4409  *
4410  *      LOCKING:
4411  *      Inherited from caller.
4412  */
4413 static int mv_pci_init_one(struct pci_dev *pdev,
4414                            const struct pci_device_id *ent)
4415 {
4416         unsigned int board_idx = (unsigned int)ent->driver_data;
4417         const struct ata_port_info *ppi[] = { &mv_port_info[board_idx], NULL };
4418         struct ata_host *host;
4419         struct mv_host_priv *hpriv;
4420         int n_ports, port, rc;
4421 
4422         ata_print_version_once(&pdev->dev, DRV_VERSION);
4423 
4424         /* allocate host */
4425         n_ports = mv_get_hc_count(ppi[0]->flags) * MV_PORTS_PER_HC;
4426 
4427         host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
4428         hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
4429         if (!host || !hpriv)
4430                 return -ENOMEM;
4431         host->private_data = hpriv;
4432         hpriv->n_ports = n_ports;
4433         hpriv->board_idx = board_idx;
4434 
4435         /* acquire resources */
4436         rc = pcim_enable_device(pdev);
4437         if (rc)
4438                 return rc;
4439 
4440         rc = pcim_iomap_regions(pdev, 1 << MV_PRIMARY_BAR, DRV_NAME);
4441         if (rc == -EBUSY)
4442                 pcim_pin_device(pdev);
4443         if (rc)
4444                 return rc;
4445         host->iomap = pcim_iomap_table(pdev);
4446         hpriv->base = host->iomap[MV_PRIMARY_BAR];
4447 
4448         rc = pci_go_64(pdev);
4449         if (rc)
4450                 return rc;
4451 
4452         rc = mv_create_dma_pools(hpriv, &pdev->dev);
4453         if (rc)
4454                 return rc;
4455 
4456         for (port = 0; port < host->n_ports; port++) {
4457                 struct ata_port *ap = host->ports[port];
4458                 void __iomem *port_mmio = mv_port_base(hpriv->base, port);
4459                 unsigned int offset = port_mmio - hpriv->base;
4460 
4461                 ata_port_pbar_desc(ap, MV_PRIMARY_BAR, -1, "mmio");
4462                 ata_port_pbar_desc(ap, MV_PRIMARY_BAR, offset, "port");
4463         }
4464 
4465         /* initialize adapter */
4466         rc = mv_init_host(host);
4467         if (rc)
4468                 return rc;
4469 
4470         /* Enable message-switched interrupts, if requested */
4471         if (msi && pci_enable_msi(pdev) == 0)
4472                 hpriv->hp_flags |= MV_HP_FLAG_MSI;
4473 
4474         mv_dump_pci_cfg(pdev, 0x68);
4475         mv_print_info(host);
4476 
4477         pci_set_master(pdev);
4478         pci_try_set_mwi(pdev);
4479         return ata_host_activate(host, pdev->irq, mv_interrupt, IRQF_SHARED,
4480                                  IS_GEN_I(hpriv) ? &mv5_sht : &mv6_sht);
4481 }
4482 
4483 #ifdef CONFIG_PM_SLEEP
4484 static int mv_pci_device_resume(struct pci_dev *pdev)
4485 {
4486         struct ata_host *host = pci_get_drvdata(pdev);
4487         int rc;
4488 
4489         rc = ata_pci_device_do_resume(pdev);
4490         if (rc)
4491                 return rc;
4492 
4493         /* initialize adapter */
4494         rc = mv_init_host(host);
4495         if (rc)
4496                 return rc;
4497 
4498         ata_host_resume(host);
4499 
4500         return 0;
4501 }
4502 #endif
4503 #endif
4504 
4505 static int __init mv_init(void)
4506 {
4507         int rc = -ENODEV;
4508 #ifdef CONFIG_PCI
4509         rc = pci_register_driver(&mv_pci_driver);
4510         if (rc < 0)
4511                 return rc;
4512 #endif
4513         rc = platform_driver_register(&mv_platform_driver);
4514 
4515 #ifdef CONFIG_PCI
4516         if (rc < 0)
4517                 pci_unregister_driver(&mv_pci_driver);
4518 #endif
4519         return rc;
4520 }
4521 
4522 static void __exit mv_exit(void)
4523 {
4524 #ifdef CONFIG_PCI
4525         pci_unregister_driver(&mv_pci_driver);
4526 #endif
4527         platform_driver_unregister(&mv_platform_driver);
4528 }
4529 
4530 MODULE_AUTHOR("Brett Russ");
4531 MODULE_DESCRIPTION("SCSI low-level driver for Marvell SATA controllers");
4532 MODULE_LICENSE("GPL");
4533 MODULE_DEVICE_TABLE(pci, mv_pci_tbl);
4534 MODULE_VERSION(DRV_VERSION);
4535 MODULE_ALIAS("platform:" DRV_NAME);
4536 
4537 module_init(mv_init);
4538 module_exit(mv_exit);
4539 

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