projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
libata: convert ata_pci_init_native_mode() users to new init model
[deliverable/linux.git] / drivers / ata / ahci.c
CommitLineData
1da177e4
LT		 1/*
2 * ahci.c - AHCI SATA support
3 *
af36d7f0
JG		 4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2004-2005 Red Hat, Inc.
9 *
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2, or (at your option)
14 * any later version.
15 *
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
20 *
21 * You should have received a copy of the GNU General Public License
22 * along with this program; see the file COPYING. If not, write to
23 * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
24 *
25 *
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
28 *
29 * AHCI hardware documentation:
1da177e4 30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
af36d7f0 31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
1da177e4
LT		 32 *
33 */
34
35#include <linux/kernel.h>
36#include <linux/module.h>
37#include <linux/pci.h>
38#include <linux/init.h>
39#include <linux/blkdev.h>
40#include <linux/delay.h>
41#include <linux/interrupt.h>
87507cfd 42#include <linux/dma-mapping.h>
a9524a76 43#include <linux/device.h>
1da177e4 44#include <scsi/scsi_host.h>
193515d5 45#include <scsi/scsi_cmnd.h>
1da177e4 46#include <linux/libata.h>
1da177e4
LT		 47
48#define DRV_NAME "ahci"
cb48cab7 49#define DRV_VERSION "2.1"
1da177e4
LT		 50
51
52enum {
53 AHCI_PCI_BAR = 5,
648a88be 54 AHCI_MAX_PORTS = 32,
1da177e4
LT		 55 AHCI_MAX_SG = 168, /* hardware max is 64K */
56 AHCI_DMA_BOUNDARY = 0xffffffff,
57 AHCI_USE_CLUSTERING = 0,
12fad3f9 58 AHCI_MAX_CMDS = 32,
dd410ff1 59 AHCI_CMD_SZ = 32,
12fad3f9 60 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
1da177e4 61 AHCI_RX_FIS_SZ = 256,
a0ea7328 62 AHCI_CMD_TBL_CDB = 0x40,
dd410ff1
TH		 63 AHCI_CMD_TBL_HDR_SZ = 0x80,
64 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
65 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
66 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
1da177e4
LT		 67 AHCI_RX_FIS_SZ,
68 AHCI_IRQ_ON_SG = (1 << 31),
69 AHCI_CMD_ATAPI = (1 << 5),
70 AHCI_CMD_WRITE = (1 << 6),
4b10e559 71 AHCI_CMD_PREFETCH = (1 << 7),
22b49985
TH		 72 AHCI_CMD_RESET = (1 << 8),
73 AHCI_CMD_CLR_BUSY = (1 << 10),
1da177e4
LT		 74
75 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
0291f95f 76 RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
78cd52d0 77 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
1da177e4
LT		 78
79 board_ahci = 0,
648a88be
TH		 80 board_ahci_pi = 1,
81 board_ahci_vt8251 = 2,
82 board_ahci_ign_iferr = 3,
55a61604 83 board_ahci_sb600 = 4,
1da177e4
LT		 84
85 /* global controller registers */
86 HOST_CAP = 0x00, /* host capabilities */
87 HOST_CTL = 0x04, /* global host control */
88 HOST_IRQ_STAT = 0x08, /* interrupt status */
89 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
90 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
91
92 /* HOST_CTL bits */
93 HOST_RESET = (1 << 0), /* reset controller; self-clear */
94 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
95 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
96
97 /* HOST_CAP bits */
0be0aa98 98 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
22b49985 99 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
0be0aa98 100 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
979db803 101 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
dd410ff1 102 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
1da177e4
LT		 103
104 /* registers for each SATA port */
105 PORT_LST_ADDR = 0x00, /* command list DMA addr */
106 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
107 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
108 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
109 PORT_IRQ_STAT = 0x10, /* interrupt status */
110 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
111 PORT_CMD = 0x18, /* port command */
112 PORT_TFDATA = 0x20, /* taskfile data */
113 PORT_SIG = 0x24, /* device TF signature */
114 PORT_CMD_ISSUE = 0x38, /* command issue */
115 PORT_SCR = 0x28, /* SATA phy register block */
116 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
117 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
118 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
119 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
120
121 /* PORT_IRQ_{STAT,MASK} bits */
122 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
123 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
124 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
125 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
126 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
127 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
128 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
129 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
130
131 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
132 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
133 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
134 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
135 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
136 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
137 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
138 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
139 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
140
78cd52d0
TH		 141 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
142 PORT_IRQ_IF_ERR |
143 PORT_IRQ_CONNECT |
4296971d 144 PORT_IRQ_PHYRDY |
78cd52d0
TH		 145 PORT_IRQ_UNK_FIS,
146 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
147 PORT_IRQ_TF_ERR |
148 PORT_IRQ_HBUS_DATA_ERR,
149 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
150 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
151 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
1da177e4
LT		 152
153 /* PORT_CMD bits */
02eaa666 154 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
1da177e4
LT		 155 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
156 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
157 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
22b49985 158 PORT_CMD_CLO = (1 << 3), /* Command list override */
1da177e4
LT		 159 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
160 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
161 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
162
0be0aa98 163 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
1da177e4
LT		 164 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
165 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
166 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
4b0060f4 167
bf2af2a2 168 /* ap->flags bits */
4aeb0e32
TH		 169 AHCI_FLAG_NO_NCQ = (1 << 24),
170 AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */
648a88be 171 AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */
55a61604 172 AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */
1da177e4
LT		 173};
174
175struct ahci_cmd_hdr {
176 u32 opts;
177 u32 status;
178 u32 tbl_addr;
179 u32 tbl_addr_hi;
180 u32 reserved[4];
181};
182
183struct ahci_sg {
184 u32 addr;
185 u32 addr_hi;
186 u32 reserved;
187 u32 flags_size;
188};
189
190struct ahci_host_priv {
d447df14
TH		 191 u32 cap; /* cap to use */
192 u32 port_map; /* port map to use */
193 u32 saved_cap; /* saved initial cap */
194 u32 saved_port_map; /* saved initial port_map */
1da177e4
LT		 195};
196
197struct ahci_port_priv {
198 struct ahci_cmd_hdr *cmd_slot;
199 dma_addr_t cmd_slot_dma;
200 void *cmd_tbl;
201 dma_addr_t cmd_tbl_dma;
1da177e4
LT		 202 void *rx_fis;
203 dma_addr_t rx_fis_dma;
0291f95f 204 /* for NCQ spurious interrupt analysis */
0291f95f
TH		 205 unsigned int ncq_saw_d2h:1;
206 unsigned int ncq_saw_dmas:1;
afb2d552 207 unsigned int ncq_saw_sdb:1;
1da177e4
LT		 208};
209
210static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
211static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
212static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
9a3d9eb0 213static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
7d12e780 214static irqreturn_t ahci_interrupt (int irq, void *dev_instance);
1da177e4 215static void ahci_irq_clear(struct ata_port *ap);
1da177e4
LT		 216static int ahci_port_start(struct ata_port *ap);
217static void ahci_port_stop(struct ata_port *ap);
1da177e4
LT		 218static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
219static void ahci_qc_prep(struct ata_queued_cmd *qc);
220static u8 ahci_check_status(struct ata_port *ap);
78cd52d0
TH		 221static void ahci_freeze(struct ata_port *ap);
222static void ahci_thaw(struct ata_port *ap);
223static void ahci_error_handler(struct ata_port *ap);
ad616ffb 224static void ahci_vt8251_error_handler(struct ata_port *ap);
78cd52d0 225static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
438ac6d5 226#ifdef CONFIG_PM
c1332875
TH		 227static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
228static int ahci_port_resume(struct ata_port *ap);
229static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
230static int ahci_pci_device_resume(struct pci_dev *pdev);
438ac6d5 231#endif
1da177e4 232
193515d5 233static struct scsi_host_template ahci_sht = {
1da177e4
LT		 234 .module = THIS_MODULE,
235 .name = DRV_NAME,
236 .ioctl = ata_scsi_ioctl,
237 .queuecommand = ata_scsi_queuecmd,
12fad3f9
TH		 238 .change_queue_depth = ata_scsi_change_queue_depth,
239 .can_queue = AHCI_MAX_CMDS - 1,
1da177e4
LT		 240 .this_id = ATA_SHT_THIS_ID,
241 .sg_tablesize = AHCI_MAX_SG,
1da177e4
LT		 242 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
243 .emulated = ATA_SHT_EMULATED,
244 .use_clustering = AHCI_USE_CLUSTERING,
245 .proc_name = DRV_NAME,
246 .dma_boundary = AHCI_DMA_BOUNDARY,
247 .slave_configure = ata_scsi_slave_config,
ccf68c34 248 .slave_destroy = ata_scsi_slave_destroy,
1da177e4 249 .bios_param = ata_std_bios_param,
438ac6d5 250#ifdef CONFIG_PM
c1332875
TH		 251 .suspend = ata_scsi_device_suspend,
252 .resume = ata_scsi_device_resume,
438ac6d5 253#endif
1da177e4
LT		 254};
255
057ace5e 256static const struct ata_port_operations ahci_ops = {
1da177e4
LT		 257 .port_disable = ata_port_disable,
258
259 .check_status = ahci_check_status,
260 .check_altstatus = ahci_check_status,
1da177e4
LT		 261 .dev_select = ata_noop_dev_select,
262
263 .tf_read = ahci_tf_read,
264
1da177e4
LT		 265 .qc_prep = ahci_qc_prep,
266 .qc_issue = ahci_qc_issue,
267
1da177e4
LT		 268 .irq_handler = ahci_interrupt,
269 .irq_clear = ahci_irq_clear,
246ce3b6
AI		 270 .irq_on = ata_dummy_irq_on,
271 .irq_ack = ata_dummy_irq_ack,
1da177e4
LT		 272
273 .scr_read = ahci_scr_read,
274 .scr_write = ahci_scr_write,
275
78cd52d0
TH		 276 .freeze = ahci_freeze,
277 .thaw = ahci_thaw,
278
279 .error_handler = ahci_error_handler,
280 .post_internal_cmd = ahci_post_internal_cmd,
281
438ac6d5 282#ifdef CONFIG_PM
c1332875
TH		 283 .port_suspend = ahci_port_suspend,
284 .port_resume = ahci_port_resume,
438ac6d5 285#endif
c1332875 286
1da177e4
LT		 287 .port_start = ahci_port_start,
288 .port_stop = ahci_port_stop,
1da177e4
LT		 289};
290
ad616ffb
TH		 291static const struct ata_port_operations ahci_vt8251_ops = {
292 .port_disable = ata_port_disable,
293
294 .check_status = ahci_check_status,
295 .check_altstatus = ahci_check_status,
296 .dev_select = ata_noop_dev_select,
297
298 .tf_read = ahci_tf_read,
299
300 .qc_prep = ahci_qc_prep,
301 .qc_issue = ahci_qc_issue,
302
303 .irq_handler = ahci_interrupt,
304 .irq_clear = ahci_irq_clear,
246ce3b6
AI		 305 .irq_on = ata_dummy_irq_on,
306 .irq_ack = ata_dummy_irq_ack,
ad616ffb
TH		 307
308 .scr_read = ahci_scr_read,
309 .scr_write = ahci_scr_write,
310
311 .freeze = ahci_freeze,
312 .thaw = ahci_thaw,
313
314 .error_handler = ahci_vt8251_error_handler,
315 .post_internal_cmd = ahci_post_internal_cmd,
316
438ac6d5 317#ifdef CONFIG_PM
ad616ffb
TH		 318 .port_suspend = ahci_port_suspend,
319 .port_resume = ahci_port_resume,
438ac6d5 320#endif
ad616ffb
TH		 321
322 .port_start = ahci_port_start,
323 .port_stop = ahci_port_stop,
324};
325
98ac62de 326static const struct ata_port_info ahci_port_info[] = {
1da177e4
LT		 327 /* board_ahci */
328 {
329 .sht = &ahci_sht,
cca3974e 330 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
4296971d
TH		 331 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
332 ATA_FLAG_SKIP_D2H_BSY,
7da79312 333 .pio_mask = 0x1f, /* pio0-4 */
1da177e4
LT		 334 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
335 .port_ops = &ahci_ops,
336 },
648a88be
TH		 337 /* board_ahci_pi */
338 {
339 .sht = &ahci_sht,
340 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
341 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
342 ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_HONOR_PI,
343 .pio_mask = 0x1f, /* pio0-4 */
344 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
345 .port_ops = &ahci_ops,
346 },
bf2af2a2
BJ		 347 /* board_ahci_vt8251 */
348 {
349 .sht = &ahci_sht,
cca3974e 350 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
bf2af2a2 351 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
ad616ffb
TH		 352 ATA_FLAG_SKIP_D2H_BSY |
353 ATA_FLAG_HRST_TO_RESUME | AHCI_FLAG_NO_NCQ,
bf2af2a2
BJ		 354 .pio_mask = 0x1f, /* pio0-4 */
355 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
ad616ffb 356 .port_ops = &ahci_vt8251_ops,
bf2af2a2 357 },
41669553
TH		 358 /* board_ahci_ign_iferr */
359 {
360 .sht = &ahci_sht,
361 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
362 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
363 ATA_FLAG_SKIP_D2H_BSY |
364 AHCI_FLAG_IGN_IRQ_IF_ERR,
365 .pio_mask = 0x1f, /* pio0-4 */
366 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
367 .port_ops = &ahci_ops,
368 },
55a61604
CH		 369 /* board_ahci_sb600 */
370 {
371 .sht = &ahci_sht,
372 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
373 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
374 ATA_FLAG_SKIP_D2H_BSY |
375 AHCI_FLAG_IGN_SERR_INTERNAL,
376 .pio_mask = 0x1f, /* pio0-4 */
377 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
378 .port_ops = &ahci_ops,
379 },
380
1da177e4
LT		 381};
382
3b7d697d 383static const struct pci_device_id ahci_pci_tbl[] = {
fe7fa31a 384 /* Intel */
54bb3a94
JG		 385 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
386 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
387 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
388 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
389 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
82490c09 390 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
54bb3a94
JG		 391 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
392 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
393 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
394 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
648a88be
TH		 395 { PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */
396 { PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */
397 { PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */
398 { PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */
399 { PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */
400 { PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */
401 { PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */
402 { PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */
403 { PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */
404 { PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */
405 { PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */
406 { PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */
407 { PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */
8af12cdb 408 { PCI_VDEVICE(INTEL, 0x292c), board_ahci_pi }, /* ICH9M */
648a88be
TH		 409 { PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */
410 { PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */
411 { PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */
fe7fa31a 412
e34bb370
TH		 413 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
414 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
415 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
fe7fa31a
JG		 416
417 /* ATI */
c65ec1c2 418 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
fe7fa31a
JG		 419
420 /* VIA */
54bb3a94 421 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
bf335542 422 { PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */
fe7fa31a
JG		 423
424 /* NVIDIA */
54bb3a94
JG		 425 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
426 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
427 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
428 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
6fbf5ba4
PC		 429 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
430 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
431 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
432 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
433 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
434 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
435 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
436 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
895663cd
PC		 437 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
438 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
439 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
440 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
441 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
442 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
443 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
444 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
fe7fa31a 445
95916edd 446 /* SiS */
54bb3a94
JG		 447 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
448 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
449 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
95916edd 450
415ae2b5
JG		 451 /* Generic, PCI class code for AHCI */
452 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
c9f89475 453 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
415ae2b5 454
1da177e4
LT		 455 { } /* terminate list */
456};
457
458
459static struct pci_driver ahci_pci_driver = {
460 .name = DRV_NAME,
461 .id_table = ahci_pci_tbl,
462 .probe = ahci_init_one,
24dc5f33 463 .remove = ata_pci_remove_one,
438ac6d5 464#ifdef CONFIG_PM
c1332875
TH		 465 .suspend = ahci_pci_device_suspend,
466 .resume = ahci_pci_device_resume,
438ac6d5 467#endif
1da177e4
LT		 468};
469
470
98fa4b60
TH		 471static inline int ahci_nr_ports(u32 cap)
472{
473 return (cap & 0x1f) + 1;
474}
475
0d5ff566
TH		 476static inline void __iomem *ahci_port_base(void __iomem *base,
477 unsigned int port)
1da177e4
LT		 478{
479 return base + 0x100 + (port * 0x80);
480}
481
d447df14
TH		 482/**
483 * ahci_save_initial_config - Save and fixup initial config values
484 * @probe_ent: probe_ent of target device
485 *
486 * Some registers containing configuration info might be setup by
487 * BIOS and might be cleared on reset. This function saves the
488 * initial values of those registers into @hpriv such that they
489 * can be restored after controller reset.
490 *
491 * If inconsistent, config values are fixed up by this function.
492 *
493 * LOCKING:
494 * None.
495 */
496static void ahci_save_initial_config(struct ata_probe_ent *probe_ent)
497{
498 struct ahci_host_priv *hpriv = probe_ent->private_data;
499 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
500 u32 cap, port_map;
17199b18 501 int i;
d447df14
TH		 502
503 /* Values prefixed with saved_ are written back to host after
504 * reset. Values without are used for driver operation.
505 */
506 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
507 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
508
509 /* fixup zero port_map */
510 if (!port_map) {
511 port_map = (1 << ahci_nr_ports(hpriv->cap)) - 1;
512 dev_printk(KERN_WARNING, probe_ent->dev,
513 "PORTS_IMPL is zero, forcing 0x%x\n", port_map);
514
515 /* write the fixed up value to the PI register */
516 hpriv->saved_port_map = port_map;
517 }
518
17199b18
TH		 519 /* cross check port_map and cap.n_ports */
520 if (probe_ent->port_flags & AHCI_FLAG_HONOR_PI) {
521 u32 tmp_port_map = port_map;
522 int n_ports = ahci_nr_ports(cap);
523
524 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
525 if (tmp_port_map & (1 << i)) {
526 n_ports--;
527 tmp_port_map &= ~(1 << i);
528 }
529 }
530
531 /* Whine if inconsistent. No need to update cap.
532 * port_map is used to determine number of ports.
533 */
534 if (n_ports || tmp_port_map)
535 dev_printk(KERN_WARNING, probe_ent->dev,
536 "nr_ports (%u) and implemented port map "
537 "(0x%x) don't match\n",
538 ahci_nr_ports(cap), port_map);
539 } else {
540 /* fabricate port_map from cap.nr_ports */
541 port_map = (1 << ahci_nr_ports(cap)) - 1;
542 }
543
d447df14
TH		 544 /* record values to use during operation */
545 hpriv->cap = cap;
546 hpriv->port_map = port_map;
547}
548
549/**
550 * ahci_restore_initial_config - Restore initial config
551 * @mmio: MMIO base for the host
552 * @hpriv: host private data
553 *
554 * Restore initial config stored by ahci_save_initial_config().
555 *
556 * LOCKING:
557 * None.
558 */
559static void ahci_restore_initial_config(void __iomem *mmio,
560 struct ahci_host_priv *hpriv)
561{
562 writel(hpriv->saved_cap, mmio + HOST_CAP);
563 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
564 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
565}
566
1da177e4
LT		 567static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
568{
569 unsigned int sc_reg;
570
571 switch (sc_reg_in) {
572 case SCR_STATUS: sc_reg = 0; break;
573 case SCR_CONTROL: sc_reg = 1; break;
574 case SCR_ERROR: sc_reg = 2; break;
575 case SCR_ACTIVE: sc_reg = 3; break;
576 default:
577 return 0xffffffffU;
578 }
579
0d5ff566 580 return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
1da177e4
LT		 581}
582
583
584static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
585 u32 val)
586{
587 unsigned int sc_reg;
588
589 switch (sc_reg_in) {
590 case SCR_STATUS: sc_reg = 0; break;
591 case SCR_CONTROL: sc_reg = 1; break;
592 case SCR_ERROR: sc_reg = 2; break;
593 case SCR_ACTIVE: sc_reg = 3; break;
594 default:
595 return;
596 }
597
0d5ff566 598 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
1da177e4
LT		 599}
600
9f592056 601static void ahci_start_engine(void __iomem *port_mmio)
7c76d1e8 602{
7c76d1e8
TH		 603 u32 tmp;
604
d8fcd116 605 /* start DMA */
9f592056 606 tmp = readl(port_mmio + PORT_CMD);
7c76d1e8
TH		 607 tmp |= PORT_CMD_START;
608 writel(tmp, port_mmio + PORT_CMD);
609 readl(port_mmio + PORT_CMD); /* flush */
610}
611
254950cd
TH		 612static int ahci_stop_engine(void __iomem *port_mmio)
613{
614 u32 tmp;
615
616 tmp = readl(port_mmio + PORT_CMD);
617
d8fcd116 618 /* check if the HBA is idle */
254950cd
TH		 619 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
620 return 0;
621
d8fcd116 622 /* setting HBA to idle */
254950cd
TH		 623 tmp &= ~PORT_CMD_START;
624 writel(tmp, port_mmio + PORT_CMD);
625
d8fcd116 626 /* wait for engine to stop. This could be as long as 500 msec */
254950cd
TH		 627 tmp = ata_wait_register(port_mmio + PORT_CMD,
628 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
d8fcd116 629 if (tmp & PORT_CMD_LIST_ON)
254950cd
TH		 630 return -EIO;
631
632 return 0;
633}
634
0be0aa98
TH		 635static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap,
636 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
637{
638 u32 tmp;
639
640 /* set FIS registers */
641 if (cap & HOST_CAP_64)
642 writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
643 writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
644
645 if (cap & HOST_CAP_64)
646 writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
647 writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
648
649 /* enable FIS reception */
650 tmp = readl(port_mmio + PORT_CMD);
651 tmp |= PORT_CMD_FIS_RX;
652 writel(tmp, port_mmio + PORT_CMD);
653
654 /* flush */
655 readl(port_mmio + PORT_CMD);
656}
657
658static int ahci_stop_fis_rx(void __iomem *port_mmio)
659{
660 u32 tmp;
661
662 /* disable FIS reception */
663 tmp = readl(port_mmio + PORT_CMD);
664 tmp &= ~PORT_CMD_FIS_RX;
665 writel(tmp, port_mmio + PORT_CMD);
666
667 /* wait for completion, spec says 500ms, give it 1000 */
668 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
669 PORT_CMD_FIS_ON, 10, 1000);
670 if (tmp & PORT_CMD_FIS_ON)
671 return -EBUSY;
672
673 return 0;
674}
675
676static void ahci_power_up(void __iomem *port_mmio, u32 cap)
677{
678 u32 cmd;
679
680 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
681
682 /* spin up device */
683 if (cap & HOST_CAP_SSS) {
684 cmd |= PORT_CMD_SPIN_UP;
685 writel(cmd, port_mmio + PORT_CMD);
686 }
687
688 /* wake up link */
689 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
690}
691
438ac6d5 692#ifdef CONFIG_PM
0be0aa98
TH		 693static void ahci_power_down(void __iomem *port_mmio, u32 cap)
694{
695 u32 cmd, scontrol;
696
07c53dac
TH		 697 if (!(cap & HOST_CAP_SSS))
698 return;
0be0aa98 699
07c53dac
TH		 700 /* put device into listen mode, first set PxSCTL.DET to 0 */
701 scontrol = readl(port_mmio + PORT_SCR_CTL);
702 scontrol &= ~0xf;
703 writel(scontrol, port_mmio + PORT_SCR_CTL);
0be0aa98 704
07c53dac
TH		 705 /* then set PxCMD.SUD to 0 */
706 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
707 cmd &= ~PORT_CMD_SPIN_UP;
708 writel(cmd, port_mmio + PORT_CMD);
0be0aa98 709}
438ac6d5 710#endif
0be0aa98
TH		 711
712static void ahci_init_port(void __iomem *port_mmio, u32 cap,
713 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
714{
0be0aa98
TH		 715 /* enable FIS reception */
716 ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma);
717
718 /* enable DMA */
719 ahci_start_engine(port_mmio);
720}
721
722static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg)
723{
724 int rc;
725
726 /* disable DMA */
727 rc = ahci_stop_engine(port_mmio);
728 if (rc) {
729 *emsg = "failed to stop engine";
730 return rc;
731 }
732
733 /* disable FIS reception */
734 rc = ahci_stop_fis_rx(port_mmio);
735 if (rc) {
736 *emsg = "failed stop FIS RX";
737 return rc;
738 }
739
0be0aa98
TH		 740 return 0;
741}
742
d447df14
TH		 743static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev,
744 struct ahci_host_priv *hpriv)
d91542c1 745{
d447df14 746 u32 tmp;
d91542c1
TH		 747
748 /* global controller reset */
749 tmp = readl(mmio + HOST_CTL);
750 if ((tmp & HOST_RESET) == 0) {
751 writel(tmp | HOST_RESET, mmio + HOST_CTL);
752 readl(mmio + HOST_CTL); /* flush */
753 }
754
755 /* reset must complete within 1 second, or
756 * the hardware should be considered fried.
757 */
758 ssleep(1);
759
760 tmp = readl(mmio + HOST_CTL);
761 if (tmp & HOST_RESET) {
762 dev_printk(KERN_ERR, &pdev->dev,
763 "controller reset failed (0x%x)\n", tmp);
764 return -EIO;
765 }
766
98fa4b60 767 /* turn on AHCI mode */
d91542c1
TH		 768 writel(HOST_AHCI_EN, mmio + HOST_CTL);
769 (void) readl(mmio + HOST_CTL); /* flush */
98fa4b60 770
d447df14
TH		 771 /* some registers might be cleared on reset. restore initial values */
772 ahci_restore_initial_config(mmio, hpriv);
d91542c1
TH		 773
774 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
775 u16 tmp16;
776
777 /* configure PCS */
778 pci_read_config_word(pdev, 0x92, &tmp16);
779 tmp16 |= 0xf;
780 pci_write_config_word(pdev, 0x92, tmp16);
781 }
782
783 return 0;
784}
785
786static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
648a88be
TH		 787 int n_ports, unsigned int port_flags,
788 struct ahci_host_priv *hpriv)
d91542c1
TH		 789{
790 int i, rc;
791 u32 tmp;
792
793 for (i = 0; i < n_ports; i++) {
794 void __iomem *port_mmio = ahci_port_base(mmio, i);
795 const char *emsg = NULL;
796
648a88be
TH		 797 if ((port_flags & AHCI_FLAG_HONOR_PI) &&
798 !(hpriv->port_map & (1 << i)))
d91542c1 799 continue;
d91542c1
TH		 800
801 /* make sure port is not active */
648a88be 802 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
d91542c1
TH		 803 if (rc)
804 dev_printk(KERN_WARNING, &pdev->dev,
805 "%s (%d)\n", emsg, rc);
806
807 /* clear SError */
808 tmp = readl(port_mmio + PORT_SCR_ERR);
809 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
810 writel(tmp, port_mmio + PORT_SCR_ERR);
811
f4b5cc87 812 /* clear port IRQ */
d91542c1
TH		 813 tmp = readl(port_mmio + PORT_IRQ_STAT);
814 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
815 if (tmp)
816 writel(tmp, port_mmio + PORT_IRQ_STAT);
817
818 writel(1 << i, mmio + HOST_IRQ_STAT);
d91542c1
TH		 819 }
820
821 tmp = readl(mmio + HOST_CTL);
822 VPRINTK("HOST_CTL 0x%x\n", tmp);
823 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
824 tmp = readl(mmio + HOST_CTL);
825 VPRINTK("HOST_CTL 0x%x\n", tmp);
826}
827
422b7595 828static unsigned int ahci_dev_classify(struct ata_port *ap)
1da177e4 829{
0d5ff566 830 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1da177e4 831 struct ata_taskfile tf;
422b7595
TH		 832 u32 tmp;
833
834 tmp = readl(port_mmio + PORT_SIG);
835 tf.lbah = (tmp >> 24) & 0xff;
836 tf.lbam = (tmp >> 16) & 0xff;
837 tf.lbal = (tmp >> 8) & 0xff;
838 tf.nsect = (tmp) & 0xff;
839
840 return ata_dev_classify(&tf);
841}
842
12fad3f9
TH		 843static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
844 u32 opts)
cc9278ed 845{
12fad3f9
TH		 846 dma_addr_t cmd_tbl_dma;
847
848 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
849
850 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
851 pp->cmd_slot[tag].status = 0;
852 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
853 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
cc9278ed
TH		 854}
855
bf2af2a2 856static int ahci_clo(struct ata_port *ap)
4658f79b 857{
0d5ff566 858 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
cca3974e 859 struct ahci_host_priv *hpriv = ap->host->private_data;
bf2af2a2
BJ		 860 u32 tmp;
861
862 if (!(hpriv->cap & HOST_CAP_CLO))
863 return -EOPNOTSUPP;
864
865 tmp = readl(port_mmio + PORT_CMD);
866 tmp |= PORT_CMD_CLO;
867 writel(tmp, port_mmio + PORT_CMD);
868
869 tmp = ata_wait_register(port_mmio + PORT_CMD,
870 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
871 if (tmp & PORT_CMD_CLO)
872 return -EIO;
873
874 return 0;
875}
876
877static int ahci_softreset(struct ata_port *ap, unsigned int *class)
878{
4658f79b 879 struct ahci_port_priv *pp = ap->private_data;
0d5ff566 880 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
4658f79b
TH		 881 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
882 const u32 cmd_fis_len = 5; /* five dwords */
883 const char *reason = NULL;
884 struct ata_taskfile tf;
75fe1806 885 u32 tmp;
4658f79b
TH		 886 u8 *fis;
887 int rc;
888
889 DPRINTK("ENTER\n");
890
81952c54 891 if (ata_port_offline(ap)) {
c2a65852
TH		 892 DPRINTK("PHY reports no device\n");
893 *class = ATA_DEV_NONE;
894 return 0;
895 }
896
4658f79b 897 /* prepare for SRST (AHCI-1.1 10.4.1) */
5457f219 898 rc = ahci_stop_engine(port_mmio);
4658f79b
TH		 899 if (rc) {
900 reason = "failed to stop engine";
901 goto fail_restart;
902 }
903
904 /* check BUSY/DRQ, perform Command List Override if necessary */
1244a19c 905 if (ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ)) {
bf2af2a2 906 rc = ahci_clo(ap);
4658f79b 907
bf2af2a2
BJ		 908 if (rc == -EOPNOTSUPP) {
909 reason = "port busy but CLO unavailable";
910 goto fail_restart;
911 } else if (rc) {
912 reason = "port busy but CLO failed";
4658f79b
TH		 913 goto fail_restart;
914 }
915 }
916
917 /* restart engine */
5457f219 918 ahci_start_engine(port_mmio);
4658f79b 919
3373efd8 920 ata_tf_init(ap->device, &tf);
4658f79b
TH		 921 fis = pp->cmd_tbl;
922
923 /* issue the first D2H Register FIS */
12fad3f9
TH		 924 ahci_fill_cmd_slot(pp, 0,
925 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
4658f79b
TH		 926
927 tf.ctl |= ATA_SRST;
928 ata_tf_to_fis(&tf, fis, 0);
929 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
930
931 writel(1, port_mmio + PORT_CMD_ISSUE);
4658f79b 932
75fe1806
TH		 933 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
934 if (tmp & 0x1) {
4658f79b
TH		 935 rc = -EIO;
936 reason = "1st FIS failed";
937 goto fail;
938 }
939
940 /* spec says at least 5us, but be generous and sleep for 1ms */
941 msleep(1);
942
943 /* issue the second D2H Register FIS */
12fad3f9 944 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
4658f79b
TH		 945
946 tf.ctl &= ~ATA_SRST;
947 ata_tf_to_fis(&tf, fis, 0);
948 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
949
950 writel(1, port_mmio + PORT_CMD_ISSUE);
951 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
952
953 /* spec mandates ">= 2ms" before checking status.
954 * We wait 150ms, because that was the magic delay used for
955 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
956 * between when the ATA command register is written, and then
957 * status is checked. Because waiting for "a while" before
958 * checking status is fine, post SRST, we perform this magic
959 * delay here as well.
960 */
961 msleep(150);
962
963 *class = ATA_DEV_NONE;
81952c54 964 if (ata_port_online(ap)) {
4658f79b
TH		 965 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
966 rc = -EIO;
967 reason = "device not ready";
968 goto fail;
969 }
970 *class = ahci_dev_classify(ap);
971 }
972
973 DPRINTK("EXIT, class=%u\n", *class);
974 return 0;
975
976 fail_restart:
5457f219 977 ahci_start_engine(port_mmio);
4658f79b 978 fail:
f15a1daf 979 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
4658f79b
TH		 980 return rc;
981}
982
2bf2cb26 983static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
422b7595 984{
4296971d
TH		 985 struct ahci_port_priv *pp = ap->private_data;
986 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
987 struct ata_taskfile tf;
0d5ff566 988 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
5457f219 989 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
4bd00f6a
TH		 990 int rc;
991
992 DPRINTK("ENTER\n");
1da177e4 993
5457f219 994 ahci_stop_engine(port_mmio);
4296971d
TH		 995
996 /* clear D2H reception area to properly wait for D2H FIS */
997 ata_tf_init(ap->device, &tf);
dfd7a3db 998 tf.command = 0x80;
4296971d
TH		 999 ata_tf_to_fis(&tf, d2h_fis, 0);
1000
2bf2cb26 1001 rc = sata_std_hardreset(ap, class);
4296971d 1002
5457f219 1003 ahci_start_engine(port_mmio);
1da177e4 1004
81952c54 1005 if (rc == 0 && ata_port_online(ap))
4bd00f6a
TH		 1006 *class = ahci_dev_classify(ap);
1007 if (*class == ATA_DEV_UNKNOWN)
1008 *class = ATA_DEV_NONE;
1da177e4 1009
4bd00f6a
TH		 1010 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1011 return rc;
1012}
1013
ad616ffb
TH		 1014static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class)
1015{
0d5ff566 1016 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
ad616ffb
TH		 1017 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1018 int rc;
1019
1020 DPRINTK("ENTER\n");
1021
1022 ahci_stop_engine(port_mmio);
1023
1024 rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context));
1025
1026 /* vt8251 needs SError cleared for the port to operate */
1027 ahci_scr_write(ap, SCR_ERROR, ahci_scr_read(ap, SCR_ERROR));
1028
1029 ahci_start_engine(port_mmio);
1030
1031 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1032
1033 /* vt8251 doesn't clear BSY on signature FIS reception,
1034 * request follow-up softreset.
1035 */
1036 return rc ?: -EAGAIN;
1037}
1038
4bd00f6a
TH		 1039static void ahci_postreset(struct ata_port *ap, unsigned int *class)
1040{
0d5ff566 1041 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
4bd00f6a
TH		 1042 u32 new_tmp, tmp;
1043
1044 ata_std_postreset(ap, class);
02eaa666
JG		 1045
1046 /* Make sure port's ATAPI bit is set appropriately */
1047 new_tmp = tmp = readl(port_mmio + PORT_CMD);
4bd00f6a 1048 if (*class == ATA_DEV_ATAPI)
02eaa666
JG		 1049 new_tmp |= PORT_CMD_ATAPI;
1050 else
1051 new_tmp &= ~PORT_CMD_ATAPI;
1052 if (new_tmp != tmp) {
1053 writel(new_tmp, port_mmio + PORT_CMD);
1054 readl(port_mmio + PORT_CMD); /* flush */
1055 }
1da177e4
LT		 1056}
1057
1058static u8 ahci_check_status(struct ata_port *ap)
1059{
0d5ff566 1060 void __iomem *mmio = ap->ioaddr.cmd_addr;
1da177e4
LT		 1061
1062 return readl(mmio + PORT_TFDATA) & 0xFF;
1063}
1064
1da177e4
LT		 1065static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
1066{
1067 struct ahci_port_priv *pp = ap->private_data;
1068 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1069
1070 ata_tf_from_fis(d2h_fis, tf);
1071}
1072
12fad3f9 1073static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1da177e4 1074{
cedc9a47
JG		 1075 struct scatterlist *sg;
1076 struct ahci_sg *ahci_sg;
828d09de 1077 unsigned int n_sg = 0;
1da177e4
LT		 1078
1079 VPRINTK("ENTER\n");
1080
1081 /*
1082 * Next, the S/G list.
1083 */
12fad3f9 1084 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
cedc9a47
JG		 1085 ata_for_each_sg(sg, qc) {
1086 dma_addr_t addr = sg_dma_address(sg);
1087 u32 sg_len = sg_dma_len(sg);
1088
1089 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1090 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1091 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
828d09de 1092
cedc9a47 1093 ahci_sg++;
828d09de 1094 n_sg++;
1da177e4 1095 }
828d09de
JG		 1096
1097 return n_sg;
1da177e4
LT		 1098}
1099
1100static void ahci_qc_prep(struct ata_queued_cmd *qc)
1101{
a0ea7328
JG		 1102 struct ata_port *ap = qc->ap;
1103 struct ahci_port_priv *pp = ap->private_data;
cc9278ed 1104 int is_atapi = is_atapi_taskfile(&qc->tf);
12fad3f9 1105 void *cmd_tbl;
1da177e4
LT		 1106 u32 opts;
1107 const u32 cmd_fis_len = 5; /* five dwords */
828d09de 1108 unsigned int n_elem;
1da177e4 1109
1da177e4
LT		 1110 /*
1111 * Fill in command table information. First, the header,
1112 * a SATA Register - Host to Device command FIS.
1113 */
12fad3f9
TH		 1114 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1115
1116 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
cc9278ed 1117 if (is_atapi) {
12fad3f9
TH		 1118 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1119 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
a0ea7328 1120 }
1da177e4 1121
cc9278ed
TH		 1122 n_elem = 0;
1123 if (qc->flags & ATA_QCFLAG_DMAMAP)
12fad3f9 1124 n_elem = ahci_fill_sg(qc, cmd_tbl);
1da177e4 1125
cc9278ed
TH		 1126 /*
1127 * Fill in command slot information.
1128 */
1129 opts = cmd_fis_len | n_elem << 16;
1130 if (qc->tf.flags & ATA_TFLAG_WRITE)
1131 opts |= AHCI_CMD_WRITE;
1132 if (is_atapi)
4b10e559 1133 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
828d09de 1134
12fad3f9 1135 ahci_fill_cmd_slot(pp, qc->tag, opts);
1da177e4
LT		 1136}
1137
78cd52d0 1138static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1da177e4 1139{
78cd52d0
TH		 1140 struct ahci_port_priv *pp = ap->private_data;
1141 struct ata_eh_info *ehi = &ap->eh_info;
1142 unsigned int err_mask = 0, action = 0;
1143 struct ata_queued_cmd *qc;
1144 u32 serror;
1da177e4 1145
78cd52d0 1146 ata_ehi_clear_desc(ehi);
1da177e4 1147
78cd52d0
TH		 1148 /* AHCI needs SError cleared; otherwise, it might lock up */
1149 serror = ahci_scr_read(ap, SCR_ERROR);
1150 ahci_scr_write(ap, SCR_ERROR, serror);
1da177e4 1151
78cd52d0
TH		 1152 /* analyze @irq_stat */
1153 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1154
41669553
TH		 1155 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1156 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1157 irq_stat &= ~PORT_IRQ_IF_ERR;
1158
55a61604 1159 if (irq_stat & PORT_IRQ_TF_ERR) {
78cd52d0 1160 err_mask |= AC_ERR_DEV;
55a61604
CH		 1161 if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
1162 serror &= ~SERR_INTERNAL;
1163 }
78cd52d0
TH		 1164
1165 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1166 err_mask |= AC_ERR_HOST_BUS;
1167 action |= ATA_EH_SOFTRESET;
1da177e4
LT		 1168 }
1169
78cd52d0
TH		 1170 if (irq_stat & PORT_IRQ_IF_ERR) {
1171 err_mask |= AC_ERR_ATA_BUS;
1172 action |= ATA_EH_SOFTRESET;
1173 ata_ehi_push_desc(ehi, ", interface fatal error");
1174 }
1da177e4 1175
78cd52d0 1176 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
4296971d 1177 ata_ehi_hotplugged(ehi);
78cd52d0
TH		 1178 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
1179 "connection status changed" : "PHY RDY changed");
1180 }
1181
1182 if (irq_stat & PORT_IRQ_UNK_FIS) {
1183 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1da177e4 1184
78cd52d0
TH		 1185 err_mask |= AC_ERR_HSM;
1186 action |= ATA_EH_SOFTRESET;
1187 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
1188 unk[0], unk[1], unk[2], unk[3]);
1189 }
1da177e4 1190
78cd52d0
TH		 1191 /* okay, let's hand over to EH */
1192 ehi->serror |= serror;
1193 ehi->action |= action;
b8f6153e 1194
1da177e4 1195 qc = ata_qc_from_tag(ap, ap->active_tag);
78cd52d0
TH		 1196 if (qc)
1197 qc->err_mask |= err_mask;
1198 else
1199 ehi->err_mask |= err_mask;
a72ec4ce 1200
78cd52d0
TH		 1201 if (irq_stat & PORT_IRQ_FREEZE)
1202 ata_port_freeze(ap);
1203 else
1204 ata_port_abort(ap);
1da177e4
LT		 1205}
1206
78cd52d0 1207static void ahci_host_intr(struct ata_port *ap)
1da177e4 1208{
0d5ff566 1209 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
ea6ba10b 1210 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
12fad3f9 1211 struct ata_eh_info *ehi = &ap->eh_info;
0291f95f 1212 struct ahci_port_priv *pp = ap->private_data;
12fad3f9 1213 u32 status, qc_active;
0291f95f 1214 int rc, known_irq = 0;
1da177e4
LT		 1215
1216 status = readl(port_mmio + PORT_IRQ_STAT);
1217 writel(status, port_mmio + PORT_IRQ_STAT);
1218
78cd52d0
TH		 1219 if (unlikely(status & PORT_IRQ_ERROR)) {
1220 ahci_error_intr(ap, status);
1221 return;
1da177e4
LT		 1222 }
1223
12fad3f9
TH		 1224 if (ap->sactive)
1225 qc_active = readl(port_mmio + PORT_SCR_ACT);
1226 else
1227 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1228
1229 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1230 if (rc > 0)
1231 return;
1232 if (rc < 0) {
1233 ehi->err_mask |= AC_ERR_HSM;
1234 ehi->action |= ATA_EH_SOFTRESET;
1235 ata_port_freeze(ap);
1236 return;
1da177e4
LT		 1237 }
1238
2a3917a8
TH		 1239 /* hmmm... a spurious interupt */
1240
0291f95f
TH		 1241 /* if !NCQ, ignore. No modern ATA device has broken HSM
1242 * implementation for non-NCQ commands.
1243 */
1244 if (!ap->sactive)
12fad3f9
TH		 1245 return;
1246
0291f95f
TH		 1247 if (status & PORT_IRQ_D2H_REG_FIS) {
1248 if (!pp->ncq_saw_d2h)
1249 ata_port_printk(ap, KERN_INFO,
1250 "D2H reg with I during NCQ, "
1251 "this message won't be printed again\n");
1252 pp->ncq_saw_d2h = 1;
1253 known_irq = 1;
1254 }
1255
1256 if (status & PORT_IRQ_DMAS_FIS) {
1257 if (!pp->ncq_saw_dmas)
1258 ata_port_printk(ap, KERN_INFO,
1259 "DMAS FIS during NCQ, "
1260 "this message won't be printed again\n");
1261 pp->ncq_saw_dmas = 1;
1262 known_irq = 1;
1263 }
1264
a2bbd0c9 1265 if (status & PORT_IRQ_SDB_FIS) {
04d4f7a1 1266 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
0291f95f 1267
afb2d552
TH		 1268 if (le32_to_cpu(f[1])) {
1269 /* SDB FIS containing spurious completions
1270 * might be dangerous, whine and fail commands
1271 * with HSM violation. EH will turn off NCQ
1272 * after several such failures.
1273 */
1274 ata_ehi_push_desc(ehi,
1275 "spurious completions during NCQ "
1276 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1277 readl(port_mmio + PORT_CMD_ISSUE),
1278 readl(port_mmio + PORT_SCR_ACT),
1279 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1280 ehi->err_mask |= AC_ERR_HSM;
1281 ehi->action |= ATA_EH_SOFTRESET;
1282 ata_port_freeze(ap);
1283 } else {
1284 if (!pp->ncq_saw_sdb)
1285 ata_port_printk(ap, KERN_INFO,
1286 "spurious SDB FIS %08x:%08x during NCQ, "
1287 "this message won't be printed again\n",
1288 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1289 pp->ncq_saw_sdb = 1;
1290 }
0291f95f
TH		 1291 known_irq = 1;
1292 }
2a3917a8 1293
0291f95f 1294 if (!known_irq)
78cd52d0 1295 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
0291f95f 1296 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
12fad3f9 1297 status, ap->active_tag, ap->sactive);
1da177e4
LT		 1298}
1299
1300static void ahci_irq_clear(struct ata_port *ap)
1301{
1302 /* TODO */
1303}
1304
7d12e780 1305static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1da177e4 1306{
cca3974e 1307 struct ata_host *host = dev_instance;
1da177e4
LT		 1308 struct ahci_host_priv *hpriv;
1309 unsigned int i, handled = 0;
ea6ba10b 1310 void __iomem *mmio;
1da177e4
LT		 1311 u32 irq_stat, irq_ack = 0;
1312
1313 VPRINTK("ENTER\n");
1314
cca3974e 1315 hpriv = host->private_data;
0d5ff566 1316 mmio = host->iomap[AHCI_PCI_BAR];
1da177e4
LT		 1317
1318 /* sigh. 0xffffffff is a valid return from h/w */
1319 irq_stat = readl(mmio + HOST_IRQ_STAT);
1320 irq_stat &= hpriv->port_map;
1321 if (!irq_stat)
1322 return IRQ_NONE;
1323
cca3974e 1324 spin_lock(&host->lock);
1da177e4 1325
cca3974e 1326 for (i = 0; i < host->n_ports; i++) {
1da177e4 1327 struct ata_port *ap;
1da177e4 1328
67846b30
JG		 1329 if (!(irq_stat & (1 << i)))
1330 continue;
1331
cca3974e 1332 ap = host->ports[i];
67846b30 1333 if (ap) {
78cd52d0 1334 ahci_host_intr(ap);
67846b30
JG		 1335 VPRINTK("port %u\n", i);
1336 } else {
1337 VPRINTK("port %u (no irq)\n", i);
6971ed1f 1338 if (ata_ratelimit())
cca3974e 1339 dev_printk(KERN_WARNING, host->dev,
a9524a76 1340 "interrupt on disabled port %u\n", i);
1da177e4 1341 }
67846b30
JG		 1342
1343 irq_ack |= (1 << i);
1da177e4
LT		 1344 }
1345
1346 if (irq_ack) {
1347 writel(irq_ack, mmio + HOST_IRQ_STAT);
1348 handled = 1;
1349 }
1350
cca3974e 1351 spin_unlock(&host->lock);
1da177e4
LT		 1352
1353 VPRINTK("EXIT\n");
1354
1355 return IRQ_RETVAL(handled);
1356}
1357
9a3d9eb0 1358static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1da177e4
LT		 1359{
1360 struct ata_port *ap = qc->ap;
0d5ff566 1361 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1da177e4 1362
12fad3f9
TH		 1363 if (qc->tf.protocol == ATA_PROT_NCQ)
1364 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1365 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1da177e4
LT		 1366 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1367
1368 return 0;
1369}
1370
78cd52d0
TH		 1371static void ahci_freeze(struct ata_port *ap)
1372{
0d5ff566 1373 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
78cd52d0
TH		 1374 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1375
1376 /* turn IRQ off */
1377 writel(0, port_mmio + PORT_IRQ_MASK);
1378}
1379
1380static void ahci_thaw(struct ata_port *ap)
1381{
0d5ff566 1382 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
78cd52d0
TH		 1383 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1384 u32 tmp;
1385
1386 /* clear IRQ */
1387 tmp = readl(port_mmio + PORT_IRQ_STAT);
1388 writel(tmp, port_mmio + PORT_IRQ_STAT);
a718728f 1389 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
78cd52d0
TH		 1390
1391 /* turn IRQ back on */
1392 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1393}
1394
1395static void ahci_error_handler(struct ata_port *ap)
1396{
0d5ff566 1397 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
5457f219 1398 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1399
b51e9e5d 1400 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
78cd52d0 1401 /* restart engine */
5457f219 1402 ahci_stop_engine(port_mmio);
1403 ahci_start_engine(port_mmio);
78cd52d0
TH		 1404 }
1405
1406 /* perform recovery */
4aeb0e32 1407 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
f5914a46 1408 ahci_postreset);
78cd52d0
TH		 1409}
1410
ad616ffb
TH		 1411static void ahci_vt8251_error_handler(struct ata_port *ap)
1412{
0d5ff566 1413 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
ad616ffb
TH		 1414 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1415
1416 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1417 /* restart engine */
1418 ahci_stop_engine(port_mmio);
1419 ahci_start_engine(port_mmio);
1420 }
1421
1422 /* perform recovery */
1423 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1424 ahci_postreset);
1425}
1426
78cd52d0
TH		 1427static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1428{
1429 struct ata_port *ap = qc->ap;
0d5ff566 1430 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
5457f219 1431 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
78cd52d0 1432
a51d644a 1433 if (qc->flags & ATA_QCFLAG_FAILED) {
78cd52d0 1434 /* make DMA engine forget about the failed command */
5457f219 1435 ahci_stop_engine(port_mmio);
1436 ahci_start_engine(port_mmio);
78cd52d0
TH		 1437 }
1438}
1439
438ac6d5 1440#ifdef CONFIG_PM
c1332875
TH		 1441static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1442{
cca3974e 1443 struct ahci_host_priv *hpriv = ap->host->private_data;
c1332875 1444 struct ahci_port_priv *pp = ap->private_data;
0d5ff566 1445 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
c1332875
TH		 1446 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1447 const char *emsg = NULL;
1448 int rc;
1449
1450 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
8e16f941
TH		 1451 if (rc == 0)
1452 ahci_power_down(port_mmio, hpriv->cap);
1453 else {
c1332875
TH		 1454 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1455 ahci_init_port(port_mmio, hpriv->cap,
1456 pp->cmd_slot_dma, pp->rx_fis_dma);
1457 }
1458
1459 return rc;
1460}
1461
1462static int ahci_port_resume(struct ata_port *ap)
1463{
1464 struct ahci_port_priv *pp = ap->private_data;
cca3974e 1465 struct ahci_host_priv *hpriv = ap->host->private_data;
0d5ff566 1466 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
c1332875
TH		 1467 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1468
8e16f941 1469 ahci_power_up(port_mmio, hpriv->cap);
c1332875
TH		 1470 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1471
1472 return 0;
1473}
1474
1475static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1476{
cca3974e 1477 struct ata_host *host = dev_get_drvdata(&pdev->dev);
0d5ff566 1478 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
c1332875
TH		 1479 u32 ctl;
1480
1481 if (mesg.event == PM_EVENT_SUSPEND) {
1482 /* AHCI spec rev1.1 section 8.3.3:
1483 * Software must disable interrupts prior to requesting a
1484 * transition of the HBA to D3 state.
1485 */
1486 ctl = readl(mmio + HOST_CTL);
1487 ctl &= ~HOST_IRQ_EN;
1488 writel(ctl, mmio + HOST_CTL);
1489 readl(mmio + HOST_CTL); /* flush */
1490 }
1491
1492 return ata_pci_device_suspend(pdev, mesg);
1493}
1494
1495static int ahci_pci_device_resume(struct pci_dev *pdev)
1496{
cca3974e
JG		 1497 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1498 struct ahci_host_priv *hpriv = host->private_data;
0d5ff566 1499 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
c1332875
TH		 1500 int rc;
1501
553c4aa6
TH		 1502 rc = ata_pci_device_do_resume(pdev);
1503 if (rc)
1504 return rc;
c1332875
TH		 1505
1506 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
d447df14 1507 rc = ahci_reset_controller(mmio, pdev, hpriv);
c1332875
TH		 1508 if (rc)
1509 return rc;
1510
648a88be
TH		 1511 ahci_init_controller(mmio, pdev, host->n_ports,
1512 host->ports[0]->flags, hpriv);
c1332875
TH		 1513 }
1514
cca3974e 1515 ata_host_resume(host);
c1332875
TH		 1516
1517 return 0;
1518}
438ac6d5 1519#endif
c1332875 1520
254950cd
TH		 1521static int ahci_port_start(struct ata_port *ap)
1522{
cca3974e
JG		 1523 struct device *dev = ap->host->dev;
1524 struct ahci_host_priv *hpriv = ap->host->private_data;
254950cd 1525 struct ahci_port_priv *pp;
0d5ff566 1526 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
254950cd
TH		 1527 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1528 void *mem;
1529 dma_addr_t mem_dma;
1530 int rc;
1531
24dc5f33 1532 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
254950cd
TH		 1533 if (!pp)
1534 return -ENOMEM;
254950cd
TH		 1535
1536 rc = ata_pad_alloc(ap, dev);
24dc5f33 1537 if (rc)
254950cd 1538 return rc;
254950cd 1539
24dc5f33
TH		 1540 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1541 GFP_KERNEL);
1542 if (!mem)
254950cd 1543 return -ENOMEM;
254950cd
TH		 1544 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1545
1546 /*
1547 * First item in chunk of DMA memory: 32-slot command table,
1548 * 32 bytes each in size
1549 */
1550 pp->cmd_slot = mem;
1551 pp->cmd_slot_dma = mem_dma;
1552
1553 mem += AHCI_CMD_SLOT_SZ;
1554 mem_dma += AHCI_CMD_SLOT_SZ;
1555
1556 /*
1557 * Second item: Received-FIS area
1558 */
1559 pp->rx_fis = mem;
1560 pp->rx_fis_dma = mem_dma;
1561
1562 mem += AHCI_RX_FIS_SZ;
1563 mem_dma += AHCI_RX_FIS_SZ;
1564
1565 /*
1566 * Third item: data area for storing a single command
1567 * and its scatter-gather table
1568 */
1569 pp->cmd_tbl = mem;
1570 pp->cmd_tbl_dma = mem_dma;
1571
1572 ap->private_data = pp;
1573
8e16f941
TH		 1574 /* power up port */
1575 ahci_power_up(port_mmio, hpriv->cap);
1576
0be0aa98
TH		 1577 /* initialize port */
1578 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
254950cd
TH		 1579
1580 return 0;
1581}
1582
1583static void ahci_port_stop(struct ata_port *ap)
1584{
cca3974e 1585 struct ahci_host_priv *hpriv = ap->host->private_data;
0d5ff566 1586 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
254950cd 1587 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
0be0aa98
TH		 1588 const char *emsg = NULL;
1589 int rc;
254950cd 1590
0be0aa98
TH		 1591 /* de-initialize port */
1592 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1593 if (rc)
1594 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
254950cd
TH		 1595}
1596
0d5ff566 1597static void ahci_setup_port(struct ata_ioports *port, void __iomem *base,
1da177e4
LT		 1598 unsigned int port_idx)
1599{
1600 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
0d5ff566 1601 base = ahci_port_base(base, port_idx);
1da177e4
LT		 1602 VPRINTK("base now==0x%lx\n", base);
1603
1604 port->cmd_addr = base;
1605 port->scr_addr = base + PORT_SCR;
1606
1607 VPRINTK("EXIT\n");
1608}
1609
1610static int ahci_host_init(struct ata_probe_ent *probe_ent)
1611{
1612 struct ahci_host_priv *hpriv = probe_ent->private_data;
1613 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
0d5ff566 1614 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
17199b18 1615 unsigned int i, using_dac;
1da177e4 1616 int rc;
1da177e4 1617
d447df14 1618 rc = ahci_reset_controller(mmio, pdev, hpriv);
d91542c1
TH		 1619 if (rc)
1620 return rc;
1da177e4 1621
17199b18
TH		 1622 probe_ent->n_ports = fls(hpriv->port_map);
1623 probe_ent->dummy_port_mask = ~hpriv->port_map;
1da177e4
LT		 1624
1625 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
17199b18 1626 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
1da177e4
LT		 1627
1628 using_dac = hpriv->cap & HOST_CAP_64;
1629 if (using_dac &&
1630 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1631 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1632 if (rc) {
1633 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1634 if (rc) {
a9524a76
JG		 1635 dev_printk(KERN_ERR, &pdev->dev,
1636 "64-bit DMA enable failed\n");
1da177e4
LT		 1637 return rc;
1638 }
1639 }
1da177e4
LT		 1640 } else {
1641 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1642 if (rc) {
a9524a76
JG		 1643 dev_printk(KERN_ERR, &pdev->dev,
1644 "32-bit DMA enable failed\n");
1da177e4
LT		 1645 return rc;
1646 }
1647 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1648 if (rc) {
a9524a76
JG		 1649 dev_printk(KERN_ERR, &pdev->dev,
1650 "32-bit consistent DMA enable failed\n");
1da177e4
LT		 1651 return rc;
1652 }
1653 }
1654
d91542c1 1655 for (i = 0; i < probe_ent->n_ports; i++)
0d5ff566 1656 ahci_setup_port(&probe_ent->port[i], mmio, i);
1da177e4 1657
648a88be
TH		 1658 ahci_init_controller(mmio, pdev, probe_ent->n_ports,
1659 probe_ent->port_flags, hpriv);
1da177e4
LT		 1660
1661 pci_set_master(pdev);
1662
1663 return 0;
1664}
1665
1da177e4
LT		 1666static void ahci_print_info(struct ata_probe_ent *probe_ent)
1667{
1668 struct ahci_host_priv *hpriv = probe_ent->private_data;
1669 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
0d5ff566 1670 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
1da177e4
LT		 1671 u32 vers, cap, impl, speed;
1672 const char *speed_s;
1673 u16 cc;
1674 const char *scc_s;
1675
1676 vers = readl(mmio + HOST_VERSION);
1677 cap = hpriv->cap;
1678 impl = hpriv->port_map;
1679
1680 speed = (cap >> 20) & 0xf;
1681 if (speed == 1)
1682 speed_s = "1.5";
1683 else if (speed == 2)
1684 speed_s = "3";
1685 else
1686 speed_s = "?";
1687
1688 pci_read_config_word(pdev, 0x0a, &cc);
c9f89475 1689 if (cc == PCI_CLASS_STORAGE_IDE)
1da177e4 1690 scc_s = "IDE";
c9f89475 1691 else if (cc == PCI_CLASS_STORAGE_SATA)
1da177e4 1692 scc_s = "SATA";
c9f89475 1693 else if (cc == PCI_CLASS_STORAGE_RAID)
1da177e4
LT		 1694 scc_s = "RAID";
1695 else
1696 scc_s = "unknown";
1697
a9524a76
JG		 1698 dev_printk(KERN_INFO, &pdev->dev,
1699 "AHCI %02x%02x.%02x%02x "
1da177e4
LT		 1700 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1701 ,
1da177e4
LT		 1702
1703 (vers >> 24) & 0xff,
1704 (vers >> 16) & 0xff,
1705 (vers >> 8) & 0xff,
1706 vers & 0xff,
1707
1708 ((cap >> 8) & 0x1f) + 1,
1709 (cap & 0x1f) + 1,
1710 speed_s,
1711 impl,
1712 scc_s);
1713
a9524a76
JG		 1714 dev_printk(KERN_INFO, &pdev->dev,
1715 "flags: "
1da177e4
LT		 1716 "%s%s%s%s%s%s"
1717 "%s%s%s%s%s%s%s\n"
1718 ,
1da177e4
LT		 1719
1720 cap & (1 << 31) ? "64bit " : "",
1721 cap & (1 << 30) ? "ncq " : "",
1722 cap & (1 << 28) ? "ilck " : "",
1723 cap & (1 << 27) ? "stag " : "",
1724 cap & (1 << 26) ? "pm " : "",
1725 cap & (1 << 25) ? "led " : "",
1726
1727 cap & (1 << 24) ? "clo " : "",
1728 cap & (1 << 19) ? "nz " : "",
1729 cap & (1 << 18) ? "only " : "",
1730 cap & (1 << 17) ? "pmp " : "",
1731 cap & (1 << 15) ? "pio " : "",
1732 cap & (1 << 14) ? "slum " : "",
1733 cap & (1 << 13) ? "part " : ""
1734 );
1735}
1736
24dc5f33 1737static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 1738{
1739 static int printed_version;
24dc5f33
TH		 1740 unsigned int board_idx = (unsigned int) ent->driver_data;
1741 struct device *dev = &pdev->dev;
1742 struct ata_probe_ent *probe_ent;
1da177e4 1743 struct ahci_host_priv *hpriv;
1da177e4
LT		 1744 int rc;
1745
1746 VPRINTK("ENTER\n");
1747
12fad3f9
TH		 1748 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1749
1da177e4 1750 if (!printed_version++)
a9524a76 1751 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1da177e4 1752
24dc5f33 1753 rc = pcim_enable_device(pdev);
1da177e4
LT		 1754 if (rc)
1755 return rc;
1756
0d5ff566
TH		 1757 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1758 if (rc == -EBUSY)
24dc5f33 1759 pcim_pin_device(pdev);
0d5ff566 1760 if (rc)
24dc5f33 1761 return rc;
1da177e4 1762
24dc5f33 1763 if (pci_enable_msi(pdev))
907f4678 1764 pci_intx(pdev, 1);
1da177e4 1765
24dc5f33
TH		 1766 probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
1767 if (probe_ent == NULL)
1768 return -ENOMEM;
1da177e4 1769
1da177e4
LT		 1770 probe_ent->dev = pci_dev_to_dev(pdev);
1771 INIT_LIST_HEAD(&probe_ent->node);
1772
24dc5f33
TH		 1773 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1774 if (!hpriv)
1775 return -ENOMEM;
1da177e4
LT		 1776
1777 probe_ent->sht = ahci_port_info[board_idx].sht;
cca3974e 1778 probe_ent->port_flags = ahci_port_info[board_idx].flags;
1da177e4
LT		 1779 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1780 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1781 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1782
1783 probe_ent->irq = pdev->irq;
1d6f359a 1784 probe_ent->irq_flags = IRQF_SHARED;
0d5ff566 1785 probe_ent->iomap = pcim_iomap_table(pdev);
1da177e4
LT		 1786 probe_ent->private_data = hpriv;
1787
1788 /* initialize adapter */
d447df14
TH		 1789 ahci_save_initial_config(probe_ent);
1790
1da177e4
LT		 1791 rc = ahci_host_init(probe_ent);
1792 if (rc)
24dc5f33 1793 return rc;
1da177e4 1794
cca3974e 1795 if (!(probe_ent->port_flags & AHCI_FLAG_NO_NCQ) &&
71f0737b 1796 (hpriv->cap & HOST_CAP_NCQ))
cca3974e 1797 probe_ent->port_flags |= ATA_FLAG_NCQ;
12fad3f9 1798
1da177e4
LT		 1799 ahci_print_info(probe_ent);
1800
24dc5f33
TH		 1801 if (!ata_device_add(probe_ent))
1802 return -ENODEV;
1da177e4 1803
24dc5f33 1804 devm_kfree(dev, probe_ent);
1da177e4 1805 return 0;
907f4678 1806}
1da177e4
LT		 1807
1808static int __init ahci_init(void)
1809{
b7887196 1810 return pci_register_driver(&ahci_pci_driver);
1da177e4
LT		 1811}
1812
1da177e4
LT		 1813static void __exit ahci_exit(void)
1814{
1815 pci_unregister_driver(&ahci_pci_driver);
1816}
1817
1818
1819MODULE_AUTHOR("Jeff Garzik");
1820MODULE_DESCRIPTION("AHCI SATA low-level driver");
1821MODULE_LICENSE("GPL");
1822MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
6885433c 1823MODULE_VERSION(DRV_VERSION);
1da177e4
LT		 1824
1825module_init(ahci_init);
1826module_exit(ahci_exit);
Linux kernel - Deliverables
This page took 0.275149 seconds and 5 git commands to generate.