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revert-mm-fix-blkdev-size-calculation-in-generic_write_checks
[linux-2.6/linux-trees-mm.git] / drivers / ata / ahci.c
blobed9b407e42d4ec3f7112a4b763b217085511e5d1
1 /*
2 * ahci.c - AHCI SATA support
3 *
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:
30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
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>
42 #include <linux/dma-mapping.h>
43 #include <linux/device.h>
44 #include <linux/dmi.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_cmnd.h>
47 #include <linux/libata.h>
48
49 #define DRV_NAME "ahci"
50 #define DRV_VERSION "3.0"
51
52 static int ahci_enable_alpm(struct ata_port *ap,
53 enum link_pm policy);
54 static void ahci_disable_alpm(struct ata_port *ap);
55
56 enum {
57 AHCI_PCI_BAR = 5,
58 AHCI_MAX_PORTS = 32,
59 AHCI_MAX_SG = 168, /* hardware max is 64K */
60 AHCI_DMA_BOUNDARY = 0xffffffff,
61 AHCI_USE_CLUSTERING = 1,
62 AHCI_MAX_CMDS = 32,
63 AHCI_CMD_SZ = 32,
64 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
65 AHCI_RX_FIS_SZ = 256,
66 AHCI_CMD_TBL_CDB = 0x40,
67 AHCI_CMD_TBL_HDR_SZ = 0x80,
68 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
69 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
70 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
71 AHCI_RX_FIS_SZ,
72 AHCI_IRQ_ON_SG = (1 << 31),
73 AHCI_CMD_ATAPI = (1 << 5),
74 AHCI_CMD_WRITE = (1 << 6),
75 AHCI_CMD_PREFETCH = (1 << 7),
76 AHCI_CMD_RESET = (1 << 8),
77 AHCI_CMD_CLR_BUSY = (1 << 10),
78
79 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
80 RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
81 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
82
83 board_ahci = 0,
84 board_ahci_vt8251 = 1,
85 board_ahci_ign_iferr = 2,
86 board_ahci_sb600 = 3,
87 board_ahci_mv = 4,
88
89 /* global controller registers */
90 HOST_CAP = 0x00, /* host capabilities */
91 HOST_CTL = 0x04, /* global host control */
92 HOST_IRQ_STAT = 0x08, /* interrupt status */
93 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
94 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
95
96 /* HOST_CTL bits */
97 HOST_RESET = (1 << 0), /* reset controller; self-clear */
98 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
99 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
100
101 /* HOST_CAP bits */
102 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
103 HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
104 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
105 HOST_CAP_ALPM = (1 << 26), /* Aggressive Link PM support */
106 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
107 HOST_CAP_SNTF = (1 << 29), /* SNotification register */
108 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
109 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
110
111 /* registers for each SATA port */
112 PORT_LST_ADDR = 0x00, /* command list DMA addr */
113 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
114 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
115 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
116 PORT_IRQ_STAT = 0x10, /* interrupt status */
117 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
118 PORT_CMD = 0x18, /* port command */
119 PORT_TFDATA = 0x20, /* taskfile data */
120 PORT_SIG = 0x24, /* device TF signature */
121 PORT_CMD_ISSUE = 0x38, /* command issue */
122 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
123 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
124 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
125 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
126 PORT_SCR_NTF = 0x3c, /* SATA phy register: SNotification */
127
128 /* PORT_IRQ_{STAT,MASK} bits */
129 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
130 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
131 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
132 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
133 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
134 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
135 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
136 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
137
138 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
139 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
140 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
141 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
142 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
143 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
144 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
145 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
146 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
147
148 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
149 PORT_IRQ_IF_ERR |
150 PORT_IRQ_CONNECT |
151 PORT_IRQ_PHYRDY |
152 PORT_IRQ_UNK_FIS |
153 PORT_IRQ_BAD_PMP,
154 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
155 PORT_IRQ_TF_ERR |
156 PORT_IRQ_HBUS_DATA_ERR,
157 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
158 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
159 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
160
161 /* PORT_CMD bits */
162 PORT_CMD_ASP = (1 << 27), /* Aggressive Slumber/Partial */
163 PORT_CMD_ALPE = (1 << 26), /* Aggressive Link PM enable */
164 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
165 PORT_CMD_PMP = (1 << 17), /* PMP attached */
166 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
167 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
168 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
169 PORT_CMD_CLO = (1 << 3), /* Command list override */
170 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
171 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
172 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
173
174 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
175 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
176 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
177 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
178
179 /* hpriv->flags bits */
180 AHCI_HFLAG_NO_NCQ = (1 << 0),
181 AHCI_HFLAG_IGN_IRQ_IF_ERR = (1 << 1), /* ignore IRQ_IF_ERR */
182 AHCI_HFLAG_IGN_SERR_INTERNAL = (1 << 2), /* ignore SERR_INTERNAL */
183 AHCI_HFLAG_32BIT_ONLY = (1 << 3), /* force 32bit */
184 AHCI_HFLAG_MV_PATA = (1 << 4), /* PATA port */
185 AHCI_HFLAG_NO_MSI = (1 << 5), /* no PCI MSI */
186 AHCI_HFLAG_NO_PMP = (1 << 6), /* no PMP */
187 AHCI_HFLAG_NO_HOTPLUG = (1 << 7), /* ignore PxSERR.DIAG.N */
188
189 /* ap->flags bits */
190
191 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
192 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
193 ATA_FLAG_ACPI_SATA | ATA_FLAG_AN |
194 ATA_FLAG_IPM,
195 AHCI_LFLAG_COMMON = ATA_LFLAG_SKIP_D2H_BSY,
196 };
197
198 struct ahci_cmd_hdr {
199 u32 opts;
200 u32 status;
201 u32 tbl_addr;
202 u32 tbl_addr_hi;
203 u32 reserved[4];
204 };
205
206 struct ahci_sg {
207 u32 addr;
208 u32 addr_hi;
209 u32 reserved;
210 u32 flags_size;
211 };
212
213 struct ahci_host_priv {
214 unsigned int flags; /* AHCI_HFLAG_* */
215 u32 cap; /* cap to use */
216 u32 port_map; /* port map to use */
217 u32 saved_cap; /* saved initial cap */
218 u32 saved_port_map; /* saved initial port_map */
219 };
220
221 struct ahci_port_priv {
222 struct ata_link *active_link;
223 struct ahci_cmd_hdr *cmd_slot;
224 dma_addr_t cmd_slot_dma;
225 void *cmd_tbl;
226 dma_addr_t cmd_tbl_dma;
227 void *rx_fis;
228 dma_addr_t rx_fis_dma;
229 /* for NCQ spurious interrupt analysis */
230 unsigned int ncq_saw_d2h:1;
231 unsigned int ncq_saw_dmas:1;
232 unsigned int ncq_saw_sdb:1;
233 u32 intr_mask; /* interrupts to enable */
234 };
235
236 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
237 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
238 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
239 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
240 static void ahci_irq_clear(struct ata_port *ap);
241 static int ahci_port_start(struct ata_port *ap);
242 static void ahci_port_stop(struct ata_port *ap);
243 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
244 static void ahci_qc_prep(struct ata_queued_cmd *qc);
245 static u8 ahci_check_status(struct ata_port *ap);
246 static void ahci_freeze(struct ata_port *ap);
247 static void ahci_thaw(struct ata_port *ap);
248 static void ahci_pmp_attach(struct ata_port *ap);
249 static void ahci_pmp_detach(struct ata_port *ap);
250 static void ahci_error_handler(struct ata_port *ap);
251 static void ahci_vt8251_error_handler(struct ata_port *ap);
252 static void ahci_p5wdh_error_handler(struct ata_port *ap);
253 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
254 static int ahci_port_resume(struct ata_port *ap);
255 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl);
256 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
257 u32 opts);
258 #ifdef CONFIG_PM
259 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
260 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
261 static int ahci_pci_device_resume(struct pci_dev *pdev);
262 #endif
263
264 static struct class_device_attribute *ahci_shost_attrs[] = {
265 &class_device_attr_link_power_management_policy,
266 NULL
267 };
268
269 static struct scsi_host_template ahci_sht = {
270 .module = THIS_MODULE,
271 .name = DRV_NAME,
272 .ioctl = ata_scsi_ioctl,
273 .queuecommand = ata_scsi_queuecmd,
274 .change_queue_depth = ata_scsi_change_queue_depth,
275 .can_queue = AHCI_MAX_CMDS - 1,
276 .this_id = ATA_SHT_THIS_ID,
277 .sg_tablesize = AHCI_MAX_SG,
278 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
279 .emulated = ATA_SHT_EMULATED,
280 .use_clustering = AHCI_USE_CLUSTERING,
281 .proc_name = DRV_NAME,
282 .dma_boundary = AHCI_DMA_BOUNDARY,
283 .slave_configure = ata_scsi_slave_config,
284 .slave_destroy = ata_scsi_slave_destroy,
285 .bios_param = ata_std_bios_param,
286 .shost_attrs = ahci_shost_attrs,
287 };
288
289 static const struct ata_port_operations ahci_ops = {
290 .check_status = ahci_check_status,
291 .check_altstatus = ahci_check_status,
292 .dev_select = ata_noop_dev_select,
293
294 .tf_read = ahci_tf_read,
295
296 .qc_defer = sata_pmp_qc_defer_cmd_switch,
297 .qc_prep = ahci_qc_prep,
298 .qc_issue = ahci_qc_issue,
299
300 .irq_clear = ahci_irq_clear,
301
302 .scr_read = ahci_scr_read,
303 .scr_write = ahci_scr_write,
304
305 .freeze = ahci_freeze,
306 .thaw = ahci_thaw,
307
308 .error_handler = ahci_error_handler,
309 .post_internal_cmd = ahci_post_internal_cmd,
310
311 .pmp_attach = ahci_pmp_attach,
312 .pmp_detach = ahci_pmp_detach,
313
314 #ifdef CONFIG_PM
315 .port_suspend = ahci_port_suspend,
316 .port_resume = ahci_port_resume,
317 #endif
318 .enable_pm = ahci_enable_alpm,
319 .disable_pm = ahci_disable_alpm,
320
321 .port_start = ahci_port_start,
322 .port_stop = ahci_port_stop,
323 };
324
325 static const struct ata_port_operations ahci_vt8251_ops = {
326 .check_status = ahci_check_status,
327 .check_altstatus = ahci_check_status,
328 .dev_select = ata_noop_dev_select,
329
330 .tf_read = ahci_tf_read,
331
332 .qc_defer = sata_pmp_qc_defer_cmd_switch,
333 .qc_prep = ahci_qc_prep,
334 .qc_issue = ahci_qc_issue,
335
336 .irq_clear = ahci_irq_clear,
337
338 .scr_read = ahci_scr_read,
339 .scr_write = ahci_scr_write,
340
341 .freeze = ahci_freeze,
342 .thaw = ahci_thaw,
343
344 .error_handler = ahci_vt8251_error_handler,
345 .post_internal_cmd = ahci_post_internal_cmd,
346
347 .pmp_attach = ahci_pmp_attach,
348 .pmp_detach = ahci_pmp_detach,
349
350 #ifdef CONFIG_PM
351 .port_suspend = ahci_port_suspend,
352 .port_resume = ahci_port_resume,
353 #endif
354
355 .port_start = ahci_port_start,
356 .port_stop = ahci_port_stop,
357 };
358
359 static const struct ata_port_operations ahci_p5wdh_ops = {
360 .check_status = ahci_check_status,
361 .check_altstatus = ahci_check_status,
362 .dev_select = ata_noop_dev_select,
363
364 .tf_read = ahci_tf_read,
365
366 .qc_defer = sata_pmp_qc_defer_cmd_switch,
367 .qc_prep = ahci_qc_prep,
368 .qc_issue = ahci_qc_issue,
369
370 .irq_clear = ahci_irq_clear,
371
372 .scr_read = ahci_scr_read,
373 .scr_write = ahci_scr_write,
374
375 .freeze = ahci_freeze,
376 .thaw = ahci_thaw,
377
378 .error_handler = ahci_p5wdh_error_handler,
379 .post_internal_cmd = ahci_post_internal_cmd,
380
381 .pmp_attach = ahci_pmp_attach,
382 .pmp_detach = ahci_pmp_detach,
383
384 #ifdef CONFIG_PM
385 .port_suspend = ahci_port_suspend,
386 .port_resume = ahci_port_resume,
387 #endif
388
389 .port_start = ahci_port_start,
390 .port_stop = ahci_port_stop,
391 };
392
393 #define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
394
395 static const struct ata_port_info ahci_port_info[] = {
396 /* board_ahci */
397 {
398 .flags = AHCI_FLAG_COMMON,
399 .link_flags = AHCI_LFLAG_COMMON,
400 .pio_mask = 0x1f, /* pio0-4 */
401 .udma_mask = ATA_UDMA6,
402 .port_ops = &ahci_ops,
403 },
404 /* board_ahci_vt8251 */
405 {
406 AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_PMP),
407 .flags = AHCI_FLAG_COMMON,
408 .link_flags = AHCI_LFLAG_COMMON | ATA_LFLAG_HRST_TO_RESUME,
409 .pio_mask = 0x1f, /* pio0-4 */
410 .udma_mask = ATA_UDMA6,
411 .port_ops = &ahci_vt8251_ops,
412 },
413 /* board_ahci_ign_iferr */
414 {
415 AHCI_HFLAGS (AHCI_HFLAG_IGN_IRQ_IF_ERR),
416 .flags = AHCI_FLAG_COMMON,
417 .link_flags = AHCI_LFLAG_COMMON,
418 .pio_mask = 0x1f, /* pio0-4 */
419 .udma_mask = ATA_UDMA6,
420 .port_ops = &ahci_ops,
421 },
422 /* board_ahci_sb600 */
423 {
424 AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
425 AHCI_HFLAG_32BIT_ONLY | AHCI_HFLAG_NO_PMP),
426 .flags = AHCI_FLAG_COMMON,
427 .link_flags = AHCI_LFLAG_COMMON,
428 .pio_mask = 0x1f, /* pio0-4 */
429 .udma_mask = ATA_UDMA6,
430 .port_ops = &ahci_ops,
431 },
432 /* board_ahci_mv */
433 {
434 AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_MSI |
435 AHCI_HFLAG_MV_PATA),
436 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
437 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
438 .link_flags = AHCI_LFLAG_COMMON,
439 .pio_mask = 0x1f, /* pio0-4 */
440 .udma_mask = ATA_UDMA6,
441 .port_ops = &ahci_ops,
442 },
443 };
444
445 static const struct pci_device_id ahci_pci_tbl[] = {
446 /* Intel */
447 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
448 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
449 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
450 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
451 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
452 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
453 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
454 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
455 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
456 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
457 { PCI_VDEVICE(INTEL, 0x2821), board_ahci }, /* ICH8 */
458 { PCI_VDEVICE(INTEL, 0x2822), board_ahci }, /* ICH8 */
459 { PCI_VDEVICE(INTEL, 0x2824), board_ahci }, /* ICH8 */
460 { PCI_VDEVICE(INTEL, 0x2829), board_ahci }, /* ICH8M */
461 { PCI_VDEVICE(INTEL, 0x282a), board_ahci }, /* ICH8M */
462 { PCI_VDEVICE(INTEL, 0x2922), board_ahci }, /* ICH9 */
463 { PCI_VDEVICE(INTEL, 0x2923), board_ahci }, /* ICH9 */
464 { PCI_VDEVICE(INTEL, 0x2924), board_ahci }, /* ICH9 */
465 { PCI_VDEVICE(INTEL, 0x2925), board_ahci }, /* ICH9 */
466 { PCI_VDEVICE(INTEL, 0x2927), board_ahci }, /* ICH9 */
467 { PCI_VDEVICE(INTEL, 0x2929), board_ahci }, /* ICH9M */
468 { PCI_VDEVICE(INTEL, 0x292a), board_ahci }, /* ICH9M */
469 { PCI_VDEVICE(INTEL, 0x292b), board_ahci }, /* ICH9M */
470 { PCI_VDEVICE(INTEL, 0x292c), board_ahci }, /* ICH9M */
471 { PCI_VDEVICE(INTEL, 0x292f), board_ahci }, /* ICH9M */
472 { PCI_VDEVICE(INTEL, 0x294d), board_ahci }, /* ICH9 */
473 { PCI_VDEVICE(INTEL, 0x294e), board_ahci }, /* ICH9M */
474 { PCI_VDEVICE(INTEL, 0x502a), board_ahci }, /* Tolapai */
475 { PCI_VDEVICE(INTEL, 0x502b), board_ahci }, /* Tolapai */
476
477 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
478 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
479 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
480
481 /* ATI */
482 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
483 { PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700/800 */
484 { PCI_VDEVICE(ATI, 0x4391), board_ahci_sb600 }, /* ATI SB700/800 */
485 { PCI_VDEVICE(ATI, 0x4392), board_ahci_sb600 }, /* ATI SB700/800 */
486 { PCI_VDEVICE(ATI, 0x4393), board_ahci_sb600 }, /* ATI SB700/800 */
487 { PCI_VDEVICE(ATI, 0x4394), board_ahci_sb600 }, /* ATI SB700/800 */
488 { PCI_VDEVICE(ATI, 0x4395), board_ahci_sb600 }, /* ATI SB700/800 */
489
490 /* VIA */
491 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
492 { PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */
493
494 /* NVIDIA */
495 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
496 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
497 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
498 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
499 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
500 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
501 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
502 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
503 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
504 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
505 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
506 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
507 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
508 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
509 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
510 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
511 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
512 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
513 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
514 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
515 { PCI_VDEVICE(NVIDIA, 0x07f0), board_ahci }, /* MCP73 */
516 { PCI_VDEVICE(NVIDIA, 0x07f1), board_ahci }, /* MCP73 */
517 { PCI_VDEVICE(NVIDIA, 0x07f2), board_ahci }, /* MCP73 */
518 { PCI_VDEVICE(NVIDIA, 0x07f3), board_ahci }, /* MCP73 */
519 { PCI_VDEVICE(NVIDIA, 0x07f4), board_ahci }, /* MCP73 */
520 { PCI_VDEVICE(NVIDIA, 0x07f5), board_ahci }, /* MCP73 */
521 { PCI_VDEVICE(NVIDIA, 0x07f6), board_ahci }, /* MCP73 */
522 { PCI_VDEVICE(NVIDIA, 0x07f7), board_ahci }, /* MCP73 */
523 { PCI_VDEVICE(NVIDIA, 0x07f8), board_ahci }, /* MCP73 */
524 { PCI_VDEVICE(NVIDIA, 0x07f9), board_ahci }, /* MCP73 */
525 { PCI_VDEVICE(NVIDIA, 0x07fa), board_ahci }, /* MCP73 */
526 { PCI_VDEVICE(NVIDIA, 0x07fb), board_ahci }, /* MCP73 */
527 { PCI_VDEVICE(NVIDIA, 0x0ad0), board_ahci }, /* MCP77 */
528 { PCI_VDEVICE(NVIDIA, 0x0ad1), board_ahci }, /* MCP77 */
529 { PCI_VDEVICE(NVIDIA, 0x0ad2), board_ahci }, /* MCP77 */
530 { PCI_VDEVICE(NVIDIA, 0x0ad3), board_ahci }, /* MCP77 */
531 { PCI_VDEVICE(NVIDIA, 0x0ad4), board_ahci }, /* MCP77 */
532 { PCI_VDEVICE(NVIDIA, 0x0ad5), board_ahci }, /* MCP77 */
533 { PCI_VDEVICE(NVIDIA, 0x0ad6), board_ahci }, /* MCP77 */
534 { PCI_VDEVICE(NVIDIA, 0x0ad7), board_ahci }, /* MCP77 */
535 { PCI_VDEVICE(NVIDIA, 0x0ad8), board_ahci }, /* MCP77 */
536 { PCI_VDEVICE(NVIDIA, 0x0ad9), board_ahci }, /* MCP77 */
537 { PCI_VDEVICE(NVIDIA, 0x0ada), board_ahci }, /* MCP77 */
538 { PCI_VDEVICE(NVIDIA, 0x0adb), board_ahci }, /* MCP77 */
539 { PCI_VDEVICE(NVIDIA, 0x0ab8), board_ahci }, /* MCP79 */
540 { PCI_VDEVICE(NVIDIA, 0x0ab9), board_ahci }, /* MCP79 */
541 { PCI_VDEVICE(NVIDIA, 0x0aba), board_ahci }, /* MCP79 */
542 { PCI_VDEVICE(NVIDIA, 0x0abb), board_ahci }, /* MCP79 */
543 { PCI_VDEVICE(NVIDIA, 0x0abc), board_ahci }, /* MCP79 */
544 { PCI_VDEVICE(NVIDIA, 0x0abd), board_ahci }, /* MCP79 */
545 { PCI_VDEVICE(NVIDIA, 0x0abe), board_ahci }, /* MCP79 */
546 { PCI_VDEVICE(NVIDIA, 0x0abf), board_ahci }, /* MCP79 */
547
548 /* SiS */
549 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
550 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
551 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
552
553 /* Marvell */
554 { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
555
556 /* Generic, PCI class code for AHCI */
557 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
558 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
559
560 { } /* terminate list */
561 };
562
563
564 static struct pci_driver ahci_pci_driver = {
565 .name = DRV_NAME,
566 .id_table = ahci_pci_tbl,
567 .probe = ahci_init_one,
568 .remove = ata_pci_remove_one,
569 #ifdef CONFIG_PM
570 .suspend = ahci_pci_device_suspend,
571 .resume = ahci_pci_device_resume,
572 #endif
573 };
574
575
576 static inline int ahci_nr_ports(u32 cap)
577 {
578 return (cap & 0x1f) + 1;
579 }
580
581 static inline void __iomem *__ahci_port_base(struct ata_host *host,
582 unsigned int port_no)
583 {
584 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
585
586 return mmio + 0x100 + (port_no * 0x80);
587 }
588
589 static inline void __iomem *ahci_port_base(struct ata_port *ap)
590 {
591 return __ahci_port_base(ap->host, ap->port_no);
592 }
593
594 /**
595 * ahci_save_initial_config - Save and fixup initial config values
596 * @pdev: target PCI device
597 * @hpriv: host private area to store config values
598 *
599 * Some registers containing configuration info might be setup by
600 * BIOS and might be cleared on reset. This function saves the
601 * initial values of those registers into @hpriv such that they
602 * can be restored after controller reset.
603 *
604 * If inconsistent, config values are fixed up by this function.
605 *
606 * LOCKING:
607 * None.
608 */
609 static void ahci_save_initial_config(struct pci_dev *pdev,
610 struct ahci_host_priv *hpriv)
611 {
612 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
613 u32 cap, port_map;
614 int i;
615
616 /* Values prefixed with saved_ are written back to host after
617 * reset. Values without are used for driver operation.
618 */
619 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
620 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
621
622 /* some chips have errata preventing 64bit use */
623 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
624 dev_printk(KERN_INFO, &pdev->dev,
625 "controller can't do 64bit DMA, forcing 32bit\n");
626 cap &= ~HOST_CAP_64;
627 }
628
629 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
630 dev_printk(KERN_INFO, &pdev->dev,
631 "controller can't do NCQ, turning off CAP_NCQ\n");
632 cap &= ~HOST_CAP_NCQ;
633 }
634
635 if ((cap && HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
636 dev_printk(KERN_INFO, &pdev->dev,
637 "controller can't do PMP, turning off CAP_PMP\n");
638 cap &= ~HOST_CAP_PMP;
639 }
640
641 /*
642 * Temporary Marvell 6145 hack: PATA port presence
643 * is asserted through the standard AHCI port
644 * presence register, as bit 4 (counting from 0)
645 */
646 if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
647 dev_printk(KERN_ERR, &pdev->dev,
648 "MV_AHCI HACK: port_map %x -> %x\n",
649 hpriv->port_map,
650 hpriv->port_map & 0xf);
651
652 port_map &= 0xf;
653 }
654
655 /* cross check port_map and cap.n_ports */
656 if (port_map) {
657 u32 tmp_port_map = port_map;
658 int n_ports = ahci_nr_ports(cap);
659
660 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
661 if (tmp_port_map & (1 << i)) {
662 n_ports--;
663 tmp_port_map &= ~(1 << i);
664 }
665 }
666
667 /* If n_ports and port_map are inconsistent, whine and
668 * clear port_map and let it be generated from n_ports.
669 */
670 if (n_ports || tmp_port_map) {
671 dev_printk(KERN_WARNING, &pdev->dev,
672 "nr_ports (%u) and implemented port map "
673 "(0x%x) don't match, using nr_ports\n",
674 ahci_nr_ports(cap), port_map);
675 port_map = 0;
676 }
677 }
678
679 /* fabricate port_map from cap.nr_ports */
680 if (!port_map) {
681 port_map = (1 << ahci_nr_ports(cap)) - 1;
682 dev_printk(KERN_WARNING, &pdev->dev,
683 "forcing PORTS_IMPL to 0x%x\n", port_map);
684
685 /* write the fixed up value to the PI register */
686 hpriv->saved_port_map = port_map;
687 }
688
689 /* record values to use during operation */
690 hpriv->cap = cap;
691 hpriv->port_map = port_map;
692 }
693
694 /**
695 * ahci_restore_initial_config - Restore initial config
696 * @host: target ATA host
697 *
698 * Restore initial config stored by ahci_save_initial_config().
699 *
700 * LOCKING:
701 * None.
702 */
703 static void ahci_restore_initial_config(struct ata_host *host)
704 {
705 struct ahci_host_priv *hpriv = host->private_data;
706 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
707
708 writel(hpriv->saved_cap, mmio + HOST_CAP);
709 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
710 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
711 }
712
713 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
714 {
715 static const int offset[] = {
716 [SCR_STATUS] = PORT_SCR_STAT,
717 [SCR_CONTROL] = PORT_SCR_CTL,
718 [SCR_ERROR] = PORT_SCR_ERR,
719 [SCR_ACTIVE] = PORT_SCR_ACT,
720 [SCR_NOTIFICATION] = PORT_SCR_NTF,
721 };
722 struct ahci_host_priv *hpriv = ap->host->private_data;
723
724 if (sc_reg < ARRAY_SIZE(offset) &&
725 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
726 return offset[sc_reg];
727 return 0;
728 }
729
730 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
731 {
732 void __iomem *port_mmio = ahci_port_base(ap);
733 int offset = ahci_scr_offset(ap, sc_reg);
734
735 if (offset) {
736 *val = readl(port_mmio + offset);
737 return 0;
738 }
739 return -EINVAL;
740 }
741
742 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
743 {
744 void __iomem *port_mmio = ahci_port_base(ap);
745 int offset = ahci_scr_offset(ap, sc_reg);
746
747 if (offset) {
748 writel(val, port_mmio + offset);
749 return 0;
750 }
751 return -EINVAL;
752 }
753
754 static void ahci_start_engine(struct ata_port *ap)
755 {
756 void __iomem *port_mmio = ahci_port_base(ap);
757 u32 tmp;
758
759 /* start DMA */
760 tmp = readl(port_mmio + PORT_CMD);
761 tmp |= PORT_CMD_START;
762 writel(tmp, port_mmio + PORT_CMD);
763 readl(port_mmio + PORT_CMD); /* flush */
764 }
765
766 static int ahci_stop_engine(struct ata_port *ap)
767 {
768 void __iomem *port_mmio = ahci_port_base(ap);
769 u32 tmp;
770
771 tmp = readl(port_mmio + PORT_CMD);
772
773 /* check if the HBA is idle */
774 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
775 return 0;
776
777 /* setting HBA to idle */
778 tmp &= ~PORT_CMD_START;
779 writel(tmp, port_mmio + PORT_CMD);
780
781 /* wait for engine to stop. This could be as long as 500 msec */
782 tmp = ata_wait_register(port_mmio + PORT_CMD,
783 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
784 if (tmp & PORT_CMD_LIST_ON)
785 return -EIO;
786
787 return 0;
788 }
789
790 static void ahci_start_fis_rx(struct ata_port *ap)
791 {
792 void __iomem *port_mmio = ahci_port_base(ap);
793 struct ahci_host_priv *hpriv = ap->host->private_data;
794 struct ahci_port_priv *pp = ap->private_data;
795 u32 tmp;
796
797 /* set FIS registers */
798 if (hpriv->cap & HOST_CAP_64)
799 writel((pp->cmd_slot_dma >> 16) >> 16,
800 port_mmio + PORT_LST_ADDR_HI);
801 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
802
803 if (hpriv->cap & HOST_CAP_64)
804 writel((pp->rx_fis_dma >> 16) >> 16,
805 port_mmio + PORT_FIS_ADDR_HI);
806 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
807
808 /* enable FIS reception */
809 tmp = readl(port_mmio + PORT_CMD);
810 tmp |= PORT_CMD_FIS_RX;
811 writel(tmp, port_mmio + PORT_CMD);
812
813 /* flush */
814 readl(port_mmio + PORT_CMD);
815 }
816
817 static int ahci_stop_fis_rx(struct ata_port *ap)
818 {
819 void __iomem *port_mmio = ahci_port_base(ap);
820 u32 tmp;
821
822 /* disable FIS reception */
823 tmp = readl(port_mmio + PORT_CMD);
824 tmp &= ~PORT_CMD_FIS_RX;
825 writel(tmp, port_mmio + PORT_CMD);
826
827 /* wait for completion, spec says 500ms, give it 1000 */
828 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
829 PORT_CMD_FIS_ON, 10, 1000);
830 if (tmp & PORT_CMD_FIS_ON)
831 return -EBUSY;
832
833 return 0;
834 }
835
836 static void ahci_power_up(struct ata_port *ap)
837 {
838 struct ahci_host_priv *hpriv = ap->host->private_data;
839 void __iomem *port_mmio = ahci_port_base(ap);
840 u32 cmd;
841
842 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
843
844 /* spin up device */
845 if (hpriv->cap & HOST_CAP_SSS) {
846 cmd |= PORT_CMD_SPIN_UP;
847 writel(cmd, port_mmio + PORT_CMD);
848 }
849
850 /* wake up link */
851 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
852 }
853
854 static void ahci_disable_alpm(struct ata_port *ap)
855 {
856 struct ahci_host_priv *hpriv = ap->host->private_data;
857 void __iomem *port_mmio = ahci_port_base(ap);
858 u32 cmd;
859 struct ahci_port_priv *pp = ap->private_data;
860
861 /* IPM bits should be disabled by libata-core */
862 /* get the existing command bits */
863 cmd = readl(port_mmio + PORT_CMD);
864
865 /* disable ALPM and ASP */
866 cmd &= ~PORT_CMD_ASP;
867 cmd &= ~PORT_CMD_ALPE;
868
869 /* force the interface back to active */
870 cmd |= PORT_CMD_ICC_ACTIVE;
871
872 /* write out new cmd value */
873 writel(cmd, port_mmio + PORT_CMD);
874 cmd = readl(port_mmio + PORT_CMD);
875
876 /* wait 10ms to be sure we've come out of any low power state */
877 msleep(10);
878
879 /* clear out any PhyRdy stuff from interrupt status */
880 writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT);
881
882 /* go ahead and clean out PhyRdy Change from Serror too */
883 ahci_scr_write(ap, SCR_ERROR, ((1 << 16) | (1 << 18)));
884
885 /*
886 * Clear flag to indicate that we should ignore all PhyRdy
887 * state changes
888 */
889 hpriv->flags &= ~AHCI_HFLAG_NO_HOTPLUG;
890
891 /*
892 * Enable interrupts on Phy Ready.
893 */
894 pp->intr_mask |= PORT_IRQ_PHYRDY;
895 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
896
897 /*
898 * don't change the link pm policy - we can be called
899 * just to turn of link pm temporarily
900 */
901 }
902
903 static int ahci_enable_alpm(struct ata_port *ap,
904 enum link_pm policy)
905 {
906 struct ahci_host_priv *hpriv = ap->host->private_data;
907 void __iomem *port_mmio = ahci_port_base(ap);
908 u32 cmd;
909 struct ahci_port_priv *pp = ap->private_data;
910 u32 asp;
911
912 /* Make sure the host is capable of link power management */
913 if (!(hpriv->cap & HOST_CAP_ALPM))
914 return -EINVAL;
915
916 switch (policy) {
917 case MAX_PERFORMANCE:
918 case NOT_AVAILABLE:
919 /*
920 * if we came here with NOT_AVAILABLE,
921 * it just means this is the first time we
922 * have tried to enable - default to max performance,
923 * and let the user go to lower power modes on request.
924 */
925 ahci_disable_alpm(ap);
926 return 0;
927 case MIN_POWER:
928 /* configure HBA to enter SLUMBER */
929 asp = PORT_CMD_ASP;
930 break;
931 case MEDIUM_POWER:
932 /* configure HBA to enter PARTIAL */
933 asp = 0;
934 break;
935 default:
936 return -EINVAL;
937 }
938
939 /*
940 * Disable interrupts on Phy Ready. This keeps us from
941 * getting woken up due to spurious phy ready interrupts
942 * TBD - Hot plug should be done via polling now, is
943 * that even supported?
944 */
945 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
946 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
947
948 /*
949 * Set a flag to indicate that we should ignore all PhyRdy
950 * state changes since these can happen now whenever we
951 * change link state
952 */
953 hpriv->flags |= AHCI_HFLAG_NO_HOTPLUG;
954
955 /* get the existing command bits */
956 cmd = readl(port_mmio + PORT_CMD);
957
958 /*
959 * Set ASP based on Policy
960 */
961 cmd |= asp;
962
963 /*
964 * Setting this bit will instruct the HBA to aggressively
965 * enter a lower power link state when it's appropriate and
966 * based on the value set above for ASP
967 */
968 cmd |= PORT_CMD_ALPE;
969
970 /* write out new cmd value */
971 writel(cmd, port_mmio + PORT_CMD);
972 cmd = readl(port_mmio + PORT_CMD);
973
974 /* IPM bits should be set by libata-core */
975 return 0;
976 }
977
978 #ifdef CONFIG_PM
979 static void ahci_power_down(struct ata_port *ap)
980 {
981 struct ahci_host_priv *hpriv = ap->host->private_data;
982 void __iomem *port_mmio = ahci_port_base(ap);
983 u32 cmd, scontrol;
984
985 if (!(hpriv->cap & HOST_CAP_SSS))
986 return;
987
988 /* put device into listen mode, first set PxSCTL.DET to 0 */
989 scontrol = readl(port_mmio + PORT_SCR_CTL);
990 scontrol &= ~0xf;
991 writel(scontrol, port_mmio + PORT_SCR_CTL);
992
993 /* then set PxCMD.SUD to 0 */
994 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
995 cmd &= ~PORT_CMD_SPIN_UP;
996 writel(cmd, port_mmio + PORT_CMD);
997 }
998 #endif
999
1000 static void ahci_start_port(struct ata_port *ap)
1001 {
1002 /* enable FIS reception */
1003 ahci_start_fis_rx(ap);
1004
1005 /* enable DMA */
1006 ahci_start_engine(ap);
1007 }
1008
1009 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
1010 {
1011 int rc;
1012
1013 /* disable DMA */
1014 rc = ahci_stop_engine(ap);
1015 if (rc) {
1016 *emsg = "failed to stop engine";
1017 return rc;
1018 }
1019
1020 /* disable FIS reception */
1021 rc = ahci_stop_fis_rx(ap);
1022 if (rc) {
1023 *emsg = "failed stop FIS RX";
1024 return rc;
1025 }
1026
1027 return 0;
1028 }
1029
1030 static int ahci_reset_controller(struct ata_host *host)
1031 {
1032 struct pci_dev *pdev = to_pci_dev(host->dev);
1033 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1034 u32 tmp;
1035
1036 /* we must be in AHCI mode, before using anything
1037 * AHCI-specific, such as HOST_RESET.
1038 */
1039 tmp = readl(mmio + HOST_CTL);
1040 if (!(tmp & HOST_AHCI_EN)) {
1041 tmp |= HOST_AHCI_EN;
1042 writel(tmp, mmio + HOST_CTL);
1043 }
1044
1045 /* global controller reset */
1046 if ((tmp & HOST_RESET) == 0) {
1047 writel(tmp | HOST_RESET, mmio + HOST_CTL);
1048 readl(mmio + HOST_CTL); /* flush */
1049 }
1050
1051 /* reset must complete within 1 second, or
1052 * the hardware should be considered fried.
1053 */
1054 ssleep(1);
1055
1056 tmp = readl(mmio + HOST_CTL);
1057 if (tmp & HOST_RESET) {
1058 dev_printk(KERN_ERR, host->dev,
1059 "controller reset failed (0x%x)\n", tmp);
1060 return -EIO;
1061 }
1062
1063 /* turn on AHCI mode */
1064 writel(HOST_AHCI_EN, mmio + HOST_CTL);
1065 (void) readl(mmio + HOST_CTL); /* flush */
1066
1067 /* some registers might be cleared on reset. restore initial values */
1068 ahci_restore_initial_config(host);
1069
1070 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
1071 u16 tmp16;
1072
1073 /* configure PCS */
1074 pci_read_config_word(pdev, 0x92, &tmp16);
1075 tmp16 |= 0xf;
1076 pci_write_config_word(pdev, 0x92, tmp16);
1077 }
1078
1079 return 0;
1080 }
1081
1082 static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
1083 int port_no, void __iomem *mmio,
1084 void __iomem *port_mmio)
1085 {
1086 const char *emsg = NULL;
1087 int rc;
1088 u32 tmp;
1089
1090 /* make sure port is not active */
1091 rc = ahci_deinit_port(ap, &emsg);
1092 if (rc)
1093 dev_printk(KERN_WARNING, &pdev->dev,
1094 "%s (%d)\n", emsg, rc);
1095
1096 /* clear SError */
1097 tmp = readl(port_mmio + PORT_SCR_ERR);
1098 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1099 writel(tmp, port_mmio + PORT_SCR_ERR);
1100
1101 /* clear port IRQ */
1102 tmp = readl(port_mmio + PORT_IRQ_STAT);
1103 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1104 if (tmp)
1105 writel(tmp, port_mmio + PORT_IRQ_STAT);
1106
1107 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1108 }
1109
1110 static void ahci_init_controller(struct ata_host *host)
1111 {
1112 struct ahci_host_priv *hpriv = host->private_data;
1113 struct pci_dev *pdev = to_pci_dev(host->dev);
1114 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1115 int i;
1116 void __iomem *port_mmio;
1117 u32 tmp;
1118
1119 if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
1120 port_mmio = __ahci_port_base(host, 4);
1121
1122 writel(0, port_mmio + PORT_IRQ_MASK);
1123
1124 /* clear port IRQ */
1125 tmp = readl(port_mmio + PORT_IRQ_STAT);
1126 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1127 if (tmp)
1128 writel(tmp, port_mmio + PORT_IRQ_STAT);
1129 }
1130
1131 for (i = 0; i < host->n_ports; i++) {
1132 struct ata_port *ap = host->ports[i];
1133
1134 port_mmio = ahci_port_base(ap);
1135 if (ata_port_is_dummy(ap))
1136 continue;
1137
1138 ahci_port_init(pdev, ap, i, mmio, port_mmio);
1139 }
1140
1141 tmp = readl(mmio + HOST_CTL);
1142 VPRINTK("HOST_CTL 0x%x\n", tmp);
1143 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1144 tmp = readl(mmio + HOST_CTL);
1145 VPRINTK("HOST_CTL 0x%x\n", tmp);
1146 }
1147
1148 static unsigned int ahci_dev_classify(struct ata_port *ap)
1149 {
1150 void __iomem *port_mmio = ahci_port_base(ap);
1151 struct ata_taskfile tf;
1152 u32 tmp;
1153
1154 tmp = readl(port_mmio + PORT_SIG);
1155 tf.lbah = (tmp >> 24) & 0xff;
1156 tf.lbam = (tmp >> 16) & 0xff;
1157 tf.lbal = (tmp >> 8) & 0xff;
1158 tf.nsect = (tmp) & 0xff;
1159
1160 return ata_dev_classify(&tf);
1161 }
1162
1163 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1164 u32 opts)
1165 {
1166 dma_addr_t cmd_tbl_dma;
1167
1168 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1169
1170 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1171 pp->cmd_slot[tag].status = 0;
1172 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1173 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1174 }
1175
1176 static int ahci_kick_engine(struct ata_port *ap, int force_restart)
1177 {
1178 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1179 struct ahci_host_priv *hpriv = ap->host->private_data;
1180 u32 tmp;
1181 int busy, rc;
1182
1183 /* do we need to kick the port? */
1184 busy = ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ);
1185 if (!busy && !force_restart)
1186 return 0;
1187
1188 /* stop engine */
1189 rc = ahci_stop_engine(ap);
1190 if (rc)
1191 goto out_restart;
1192
1193 /* need to do CLO? */
1194 if (!busy) {
1195 rc = 0;
1196 goto out_restart;
1197 }
1198
1199 if (!(hpriv->cap & HOST_CAP_CLO)) {
1200 rc = -EOPNOTSUPP;
1201 goto out_restart;
1202 }
1203
1204 /* perform CLO */
1205 tmp = readl(port_mmio + PORT_CMD);
1206 tmp |= PORT_CMD_CLO;
1207 writel(tmp, port_mmio + PORT_CMD);
1208
1209 rc = 0;
1210 tmp = ata_wait_register(port_mmio + PORT_CMD,
1211 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1212 if (tmp & PORT_CMD_CLO)
1213 rc = -EIO;
1214
1215 /* restart engine */
1216 out_restart:
1217 ahci_start_engine(ap);
1218 return rc;
1219 }
1220
1221 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1222 struct ata_taskfile *tf, int is_cmd, u16 flags,
1223 unsigned long timeout_msec)
1224 {
1225 const u32 cmd_fis_len = 5; /* five dwords */
1226 struct ahci_port_priv *pp = ap->private_data;
1227 void __iomem *port_mmio = ahci_port_base(ap);
1228 u8 *fis = pp->cmd_tbl;
1229 u32 tmp;
1230
1231 /* prep the command */
1232 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1233 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1234
1235 /* issue & wait */
1236 writel(1, port_mmio + PORT_CMD_ISSUE);
1237
1238 if (timeout_msec) {
1239 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
1240 1, timeout_msec);
1241 if (tmp & 0x1) {
1242 ahci_kick_engine(ap, 1);
1243 return -EBUSY;
1244 }
1245 } else
1246 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1247
1248 return 0;
1249 }
1250
1251 static int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1252 int pmp, unsigned long deadline)
1253 {
1254 struct ata_port *ap = link->ap;
1255 const char *reason = NULL;
1256 unsigned long now, msecs;
1257 struct ata_taskfile tf;
1258 int rc;
1259
1260 DPRINTK("ENTER\n");
1261
1262 if (ata_link_offline(link)) {
1263 DPRINTK("PHY reports no device\n");
1264 *class = ATA_DEV_NONE;
1265 return 0;
1266 }
1267
1268 /* prepare for SRST (AHCI-1.1 10.4.1) */
1269 rc = ahci_kick_engine(ap, 1);
1270 if (rc)
1271 ata_link_printk(link, KERN_WARNING,
1272 "failed to reset engine (errno=%d)", rc);
1273
1274 ata_tf_init(link->device, &tf);
1275
1276 /* issue the first D2H Register FIS */
1277 msecs = 0;
1278 now = jiffies;
1279 if (time_after(now, deadline))
1280 msecs = jiffies_to_msecs(deadline - now);
1281
1282 tf.ctl |= ATA_SRST;
1283 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1284 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1285 rc = -EIO;
1286 reason = "1st FIS failed";
1287 goto fail;
1288 }
1289
1290 /* spec says at least 5us, but be generous and sleep for 1ms */
1291 msleep(1);
1292
1293 /* issue the second D2H Register FIS */
1294 tf.ctl &= ~ATA_SRST;
1295 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1296
1297 /* wait a while before checking status */
1298 ata_wait_after_reset(ap, deadline);
1299
1300 rc = ata_wait_ready(ap, deadline);
1301 /* link occupied, -ENODEV too is an error */
1302 if (rc) {
1303 reason = "device not ready";
1304 goto fail;
1305 }
1306 *class = ahci_dev_classify(ap);
1307
1308 DPRINTK("EXIT, class=%u\n", *class);
1309 return 0;
1310
1311 fail:
1312 ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
1313 return rc;
1314 }
1315
1316 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1317 unsigned long deadline)
1318 {
1319 int pmp = 0;
1320
1321 if (link->ap->flags & ATA_FLAG_PMP)
1322 pmp = SATA_PMP_CTRL_PORT;
1323
1324 return ahci_do_softreset(link, class, pmp, deadline);
1325 }
1326
1327 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1328 unsigned long deadline)
1329 {
1330 struct ata_port *ap = link->ap;
1331 struct ahci_port_priv *pp = ap->private_data;
1332 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1333 struct ata_taskfile tf;
1334 int rc;
1335
1336 DPRINTK("ENTER\n");
1337
1338 ahci_stop_engine(ap);
1339
1340 /* clear D2H reception area to properly wait for D2H FIS */
1341 ata_tf_init(link->device, &tf);
1342 tf.command = 0x80;
1343 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1344
1345 rc = sata_std_hardreset(link, class, deadline);
1346
1347 ahci_start_engine(ap);
1348
1349 if (rc == 0 && ata_link_online(link))
1350 *class = ahci_dev_classify(ap);
1351 if (rc != -EAGAIN && *class == ATA_DEV_UNKNOWN)
1352 *class = ATA_DEV_NONE;
1353
1354 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1355 return rc;
1356 }
1357
1358 static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
1359 unsigned long deadline)
1360 {
1361 struct ata_port *ap = link->ap;
1362 u32 serror;
1363 int rc;
1364
1365 DPRINTK("ENTER\n");
1366
1367 ahci_stop_engine(ap);
1368
1369 rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
1370 deadline);
1371
1372 /* vt8251 needs SError cleared for the port to operate */
1373 ahci_scr_read(ap, SCR_ERROR, &serror);
1374 ahci_scr_write(ap, SCR_ERROR, serror);
1375
1376 ahci_start_engine(ap);
1377
1378 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1379
1380 /* vt8251 doesn't clear BSY on signature FIS reception,
1381 * request follow-up softreset.
1382 */
1383 return rc ?: -EAGAIN;
1384 }
1385
1386 static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
1387 unsigned long deadline)
1388 {
1389 struct ata_port *ap = link->ap;
1390 struct ahci_port_priv *pp = ap->private_data;
1391 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1392 struct ata_taskfile tf;
1393 int rc;
1394
1395 ahci_stop_engine(ap);
1396
1397 /* clear D2H reception area to properly wait for D2H FIS */
1398 ata_tf_init(link->device, &tf);
1399 tf.command = 0x80;
1400 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1401
1402 rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
1403 deadline);
1404
1405 ahci_start_engine(ap);
1406
1407 if (rc || ata_link_offline(link))
1408 return rc;
1409
1410 /* spec mandates ">= 2ms" before checking status */
1411 msleep(150);
1412
1413 /* The pseudo configuration device on SIMG4726 attached to
1414 * ASUS P5W-DH Deluxe doesn't send signature FIS after
1415 * hardreset if no device is attached to the first downstream
1416 * port && the pseudo device locks up on SRST w/ PMP==0. To
1417 * work around this, wait for !BSY only briefly. If BSY isn't
1418 * cleared, perform CLO and proceed to IDENTIFY (achieved by
1419 * ATA_LFLAG_NO_SRST and ATA_LFLAG_ASSUME_ATA).
1420 *
1421 * Wait for two seconds. Devices attached to downstream port
1422 * which can't process the following IDENTIFY after this will
1423 * have to be reset again. For most cases, this should
1424 * suffice while making probing snappish enough.
1425 */
1426 rc = ata_wait_ready(ap, jiffies + 2 * HZ);
1427 if (rc)
1428 ahci_kick_engine(ap, 0);
1429
1430 return 0;
1431 }
1432
1433 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1434 {
1435 struct ata_port *ap = link->ap;
1436 void __iomem *port_mmio = ahci_port_base(ap);
1437 u32 new_tmp, tmp;
1438
1439 ata_std_postreset(link, class);
1440
1441 /* Make sure port's ATAPI bit is set appropriately */
1442 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1443 if (*class == ATA_DEV_ATAPI)
1444 new_tmp |= PORT_CMD_ATAPI;
1445 else
1446 new_tmp &= ~PORT_CMD_ATAPI;
1447 if (new_tmp != tmp) {
1448 writel(new_tmp, port_mmio + PORT_CMD);
1449 readl(port_mmio + PORT_CMD); /* flush */
1450 }
1451 }
1452
1453 static int ahci_pmp_softreset(struct ata_link *link, unsigned int *class,
1454 unsigned long deadline)
1455 {
1456 return ahci_do_softreset(link, class, link->pmp, deadline);
1457 }
1458
1459 static u8 ahci_check_status(struct ata_port *ap)
1460 {
1461 void __iomem *mmio = ap->ioaddr.cmd_addr;
1462
1463 return readl(mmio + PORT_TFDATA) & 0xFF;
1464 }
1465
1466 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
1467 {
1468 struct ahci_port_priv *pp = ap->private_data;
1469 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1470
1471 ata_tf_from_fis(d2h_fis, tf);
1472 }
1473
1474 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1475 {
1476 struct scatterlist *sg;
1477 struct ahci_sg *ahci_sg;
1478 unsigned int n_sg = 0;
1479
1480 VPRINTK("ENTER\n");
1481
1482 /*
1483 * Next, the S/G list.
1484 */
1485 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1486 ata_for_each_sg(sg, qc) {
1487 dma_addr_t addr = sg_dma_address(sg);
1488 u32 sg_len = sg_dma_len(sg);
1489
1490 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1491 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1492 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
1493
1494 ahci_sg++;
1495 n_sg++;
1496 }
1497
1498 return n_sg;
1499 }
1500
1501 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1502 {
1503 struct ata_port *ap = qc->ap;
1504 struct ahci_port_priv *pp = ap->private_data;
1505 int is_atapi = is_atapi_taskfile(&qc->tf);
1506 void *cmd_tbl;
1507 u32 opts;
1508 const u32 cmd_fis_len = 5; /* five dwords */
1509 unsigned int n_elem;
1510
1511 /*
1512 * Fill in command table information. First, the header,
1513 * a SATA Register - Host to Device command FIS.
1514 */
1515 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1516
1517 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1518 if (is_atapi) {
1519 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1520 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1521 }
1522
1523 n_elem = 0;
1524 if (qc->flags & ATA_QCFLAG_DMAMAP)
1525 n_elem = ahci_fill_sg(qc, cmd_tbl);
1526
1527 /*
1528 * Fill in command slot information.
1529 */
1530 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1531 if (qc->tf.flags & ATA_TFLAG_WRITE)
1532 opts |= AHCI_CMD_WRITE;
1533 if (is_atapi)
1534 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1535
1536 ahci_fill_cmd_slot(pp, qc->tag, opts);
1537 }
1538
1539 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1540 {
1541 struct ahci_host_priv *hpriv = ap->host->private_data;
1542 struct ahci_port_priv *pp = ap->private_data;
1543 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1544 struct ata_link *link = NULL;
1545 struct ata_queued_cmd *active_qc;
1546 struct ata_eh_info *active_ehi;
1547 u32 serror;
1548
1549 /* determine active link */
1550 ata_port_for_each_link(link, ap)
1551 if (ata_link_active(link))
1552 break;
1553 if (!link)
1554 link = &ap->link;
1555
1556 active_qc = ata_qc_from_tag(ap, link->active_tag);
1557 active_ehi = &link->eh_info;
1558
1559 /* record irq stat */
1560 ata_ehi_clear_desc(host_ehi);
1561 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1562
1563 /* AHCI needs SError cleared; otherwise, it might lock up */
1564 ahci_scr_read(ap, SCR_ERROR, &serror);
1565 ahci_scr_write(ap, SCR_ERROR, serror);
1566 host_ehi->serror |= serror;
1567
1568 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1569 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1570 irq_stat &= ~PORT_IRQ_IF_ERR;
1571
1572 if (irq_stat & PORT_IRQ_TF_ERR) {
1573 /* If qc is active, charge it; otherwise, the active
1574 * link. There's no active qc on NCQ errors. It will
1575 * be determined by EH by reading log page 10h.
1576 */
1577 if (active_qc)
1578 active_qc->err_mask |= AC_ERR_DEV;
1579 else
1580 active_ehi->err_mask |= AC_ERR_DEV;
1581
1582 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1583 host_ehi->serror &= ~SERR_INTERNAL;
1584 }
1585
1586 if (irq_stat & PORT_IRQ_UNK_FIS) {
1587 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1588
1589 active_ehi->err_mask |= AC_ERR_HSM;
1590 active_ehi->action |= ATA_EH_SOFTRESET;
1591 ata_ehi_push_desc(active_ehi,
1592 "unknown FIS %08x %08x %08x %08x" ,
1593 unk[0], unk[1], unk[2], unk[3]);
1594 }
1595
1596 if (ap->nr_pmp_links && (irq_stat & PORT_IRQ_BAD_PMP)) {
1597 active_ehi->err_mask |= AC_ERR_HSM;
1598 active_ehi->action |= ATA_EH_SOFTRESET;
1599 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1600 }
1601
1602 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1603 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1604 host_ehi->action |= ATA_EH_SOFTRESET;
1605 ata_ehi_push_desc(host_ehi, "host bus error");
1606 }
1607
1608 if (irq_stat & PORT_IRQ_IF_ERR) {
1609 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1610 host_ehi->action |= ATA_EH_SOFTRESET;
1611 ata_ehi_push_desc(host_ehi, "interface fatal error");
1612 }
1613
1614 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1615 ata_ehi_hotplugged(host_ehi);
1616 ata_ehi_push_desc(host_ehi, "%s",
1617 irq_stat & PORT_IRQ_CONNECT ?
1618 "connection status changed" : "PHY RDY changed");
1619 }
1620
1621 /* okay, let's hand over to EH */
1622
1623 if (irq_stat & PORT_IRQ_FREEZE)
1624 ata_port_freeze(ap);
1625 else
1626 ata_port_abort(ap);
1627 }
1628
1629 static void ahci_port_intr(struct ata_port *ap)
1630 {
1631 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1632 struct ata_eh_info *ehi = &ap->link.eh_info;
1633 struct ahci_port_priv *pp = ap->private_data;
1634 struct ahci_host_priv *hpriv = ap->host->private_data;
1635 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1636 u32 status, qc_active;
1637 int rc, known_irq = 0;
1638
1639 status = readl(port_mmio + PORT_IRQ_STAT);
1640 writel(status, port_mmio + PORT_IRQ_STAT);
1641
1642 /* ignore BAD_PMP while resetting */
1643 if (unlikely(resetting))
1644 status &= ~PORT_IRQ_BAD_PMP;
1645
1646 /* If we are getting PhyRdy, this is
1647 * just a power state change, we should
1648 * clear out this, plus the PhyRdy/Comm
1649 * Wake bits from Serror
1650 */
1651 if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) &&
1652 (status & PORT_IRQ_PHYRDY)) {
1653 status &= ~PORT_IRQ_PHYRDY;
1654 ahci_scr_write(ap, SCR_ERROR, ((1 << 16) | (1 << 18)));
1655 }
1656
1657 if (unlikely(status & PORT_IRQ_ERROR)) {
1658 ahci_error_intr(ap, status);
1659 return;
1660 }
1661
1662 if (status & PORT_IRQ_SDB_FIS) {
1663 /* If SNotification is available, leave notification
1664 * handling to sata_async_notification(). If not,
1665 * emulate it by snooping SDB FIS RX area.
1666 *
1667 * Snooping FIS RX area is probably cheaper than
1668 * poking SNotification but some constrollers which
1669 * implement SNotification, ICH9 for example, don't
1670 * store AN SDB FIS into receive area.
1671 */
1672 if (hpriv->cap & HOST_CAP_SNTF)
1673 sata_async_notification(ap);
1674 else {
1675 /* If the 'N' bit in word 0 of the FIS is set,
1676 * we just received asynchronous notification.
1677 * Tell libata about it.
1678 */
1679 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1680 u32 f0 = le32_to_cpu(f[0]);
1681
1682 if (f0 & (1 << 15))
1683 sata_async_notification(ap);
1684 }
1685 }
1686
1687 /* pp->active_link is valid iff any command is in flight */
1688 if (ap->qc_active && pp->active_link->sactive)
1689 qc_active = readl(port_mmio + PORT_SCR_ACT);
1690 else
1691 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1692
1693 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1694
1695 /* If resetting, spurious or invalid completions are expected,
1696 * return unconditionally.
1697 */
1698 if (resetting)
1699 return;
1700
1701 if (rc > 0)
1702 return;
1703 if (rc < 0) {
1704 ehi->err_mask |= AC_ERR_HSM;
1705 ehi->action |= ATA_EH_SOFTRESET;
1706 ata_port_freeze(ap);
1707 return;
1708 }
1709
1710 /* hmmm... a spurious interrupt */
1711
1712 /* if !NCQ, ignore. No modern ATA device has broken HSM
1713 * implementation for non-NCQ commands.
1714 */
1715 if (!ap->link.sactive)
1716 return;
1717
1718 if (status & PORT_IRQ_D2H_REG_FIS) {
1719 if (!pp->ncq_saw_d2h)
1720 ata_port_printk(ap, KERN_INFO,
1721 "D2H reg with I during NCQ, "
1722 "this message won't be printed again\n");
1723 pp->ncq_saw_d2h = 1;
1724 known_irq = 1;
1725 }
1726
1727 if (status & PORT_IRQ_DMAS_FIS) {
1728 if (!pp->ncq_saw_dmas)
1729 ata_port_printk(ap, KERN_INFO,
1730 "DMAS FIS during NCQ, "
1731 "this message won't be printed again\n");
1732 pp->ncq_saw_dmas = 1;
1733 known_irq = 1;
1734 }
1735
1736 if (status & PORT_IRQ_SDB_FIS) {
1737 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1738
1739 if (le32_to_cpu(f[1])) {
1740 /* SDB FIS containing spurious completions
1741 * might be dangerous, whine and fail commands
1742 * with HSM violation. EH will turn off NCQ
1743 * after several such failures.
1744 */
1745 ata_ehi_push_desc(ehi,
1746 "spurious completions during NCQ "
1747 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1748 readl(port_mmio + PORT_CMD_ISSUE),
1749 readl(port_mmio + PORT_SCR_ACT),
1750 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1751 ehi->err_mask |= AC_ERR_HSM;
1752 ehi->action |= ATA_EH_SOFTRESET;
1753 ata_port_freeze(ap);
1754 } else {
1755 if (!pp->ncq_saw_sdb)
1756 ata_port_printk(ap, KERN_INFO,
1757 "spurious SDB FIS %08x:%08x during NCQ, "
1758 "this message won't be printed again\n",
1759 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1760 pp->ncq_saw_sdb = 1;
1761 }
1762 known_irq = 1;
1763 }
1764
1765 if (!known_irq)
1766 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1767 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1768 status, ap->link.active_tag, ap->link.sactive);
1769 }
1770
1771 static void ahci_irq_clear(struct ata_port *ap)
1772 {
1773 /* TODO */
1774 }
1775
1776 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1777 {
1778 struct ata_host *host = dev_instance;
1779 struct ahci_host_priv *hpriv;
1780 unsigned int i, handled = 0;
1781 void __iomem *mmio;
1782 u32 irq_stat, irq_ack = 0;
1783
1784 VPRINTK("ENTER\n");
1785
1786 hpriv = host->private_data;
1787 mmio = host->iomap[AHCI_PCI_BAR];
1788
1789 /* sigh. 0xffffffff is a valid return from h/w */
1790 irq_stat = readl(mmio + HOST_IRQ_STAT);
1791 irq_stat &= hpriv->port_map;
1792 if (!irq_stat)
1793 return IRQ_NONE;
1794
1795 spin_lock(&host->lock);
1796
1797 for (i = 0; i < host->n_ports; i++) {
1798 struct ata_port *ap;
1799
1800 if (!(irq_stat & (1 << i)))
1801 continue;
1802
1803 ap = host->ports[i];
1804 if (ap) {
1805 ahci_port_intr(ap);
1806 VPRINTK("port %u\n", i);
1807 } else {
1808 VPRINTK("port %u (no irq)\n", i);
1809 if (ata_ratelimit())
1810 dev_printk(KERN_WARNING, host->dev,
1811 "interrupt on disabled port %u\n", i);
1812 }
1813
1814 irq_ack |= (1 << i);
1815 }
1816
1817 if (irq_ack) {
1818 writel(irq_ack, mmio + HOST_IRQ_STAT);
1819 handled = 1;
1820 }
1821
1822 spin_unlock(&host->lock);
1823
1824 VPRINTK("EXIT\n");
1825
1826 return IRQ_RETVAL(handled);
1827 }
1828
1829 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1830 {
1831 struct ata_port *ap = qc->ap;
1832 void __iomem *port_mmio = ahci_port_base(ap);
1833 struct ahci_port_priv *pp = ap->private_data;
1834
1835 /* Keep track of the currently active link. It will be used
1836 * in completion path to determine whether NCQ phase is in
1837 * progress.
1838 */
1839 pp->active_link = qc->dev->link;
1840
1841 if (qc->tf.protocol == ATA_PROT_NCQ)
1842 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1843 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1844 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1845
1846 return 0;
1847 }
1848
1849 static void ahci_freeze(struct ata_port *ap)
1850 {
1851 void __iomem *port_mmio = ahci_port_base(ap);
1852
1853 /* turn IRQ off */
1854 writel(0, port_mmio + PORT_IRQ_MASK);
1855 }
1856
1857 static void ahci_thaw(struct ata_port *ap)
1858 {
1859 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1860 void __iomem *port_mmio = ahci_port_base(ap);
1861 u32 tmp;
1862 struct ahci_port_priv *pp = ap->private_data;
1863
1864 /* clear IRQ */
1865 tmp = readl(port_mmio + PORT_IRQ_STAT);
1866 writel(tmp, port_mmio + PORT_IRQ_STAT);
1867 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1868
1869 /* turn IRQ back on */
1870 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1871 }
1872
1873 static void ahci_error_handler(struct ata_port *ap)
1874 {
1875 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1876 /* restart engine */
1877 ahci_stop_engine(ap);
1878 ahci_start_engine(ap);
1879 }
1880
1881 /* perform recovery */
1882 sata_pmp_do_eh(ap, ata_std_prereset, ahci_softreset,
1883 ahci_hardreset, ahci_postreset,
1884 sata_pmp_std_prereset, ahci_pmp_softreset,
1885 sata_pmp_std_hardreset, sata_pmp_std_postreset);
1886 }
1887
1888 static void ahci_vt8251_error_handler(struct ata_port *ap)
1889 {
1890 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1891 /* restart engine */
1892 ahci_stop_engine(ap);
1893 ahci_start_engine(ap);
1894 }
1895
1896 /* perform recovery */
1897 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1898 ahci_postreset);
1899 }
1900
1901 static void ahci_p5wdh_error_handler(struct ata_port *ap)
1902 {
1903 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1904 /* restart engine */
1905 ahci_stop_engine(ap);
1906 ahci_start_engine(ap);
1907 }
1908
1909 /* perform recovery */
1910 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_p5wdh_hardreset,
1911 ahci_postreset);
1912 }
1913
1914 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1915 {
1916 struct ata_port *ap = qc->ap;
1917
1918 /* make DMA engine forget about the failed command */
1919 if (qc->flags & ATA_QCFLAG_FAILED)
1920 ahci_kick_engine(ap, 1);
1921 }
1922
1923 static void ahci_pmp_attach(struct ata_port *ap)
1924 {
1925 void __iomem *port_mmio = ahci_port_base(ap);
1926 struct ahci_port_priv *pp = ap->private_data;
1927 u32 cmd;
1928
1929 cmd = readl(port_mmio + PORT_CMD);
1930 cmd |= PORT_CMD_PMP;
1931 writel(cmd, port_mmio + PORT_CMD);
1932
1933 pp->intr_mask |= PORT_IRQ_BAD_PMP;
1934 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1935 }
1936
1937 static void ahci_pmp_detach(struct ata_port *ap)
1938 {
1939 void __iomem *port_mmio = ahci_port_base(ap);
1940 struct ahci_port_priv *pp = ap->private_data;
1941 u32 cmd;
1942
1943 cmd = readl(port_mmio + PORT_CMD);
1944 cmd &= ~PORT_CMD_PMP;
1945 writel(cmd, port_mmio + PORT_CMD);
1946
1947 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
1948 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1949 }
1950
1951 static int ahci_port_resume(struct ata_port *ap)
1952 {
1953 ahci_power_up(ap);
1954 ahci_start_port(ap);
1955
1956 if (ap->nr_pmp_links)
1957 ahci_pmp_attach(ap);
1958 else
1959 ahci_pmp_detach(ap);
1960
1961 return 0;
1962 }
1963
1964 #ifdef CONFIG_PM
1965 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1966 {
1967 const char *emsg = NULL;
1968 int rc;
1969
1970 rc = ahci_deinit_port(ap, &emsg);
1971 if (rc == 0)
1972 ahci_power_down(ap);
1973 else {
1974 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1975 ahci_start_port(ap);
1976 }
1977
1978 return rc;
1979 }
1980
1981 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1982 {
1983 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1984 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1985 u32 ctl;
1986
1987 if (mesg.event == PM_EVENT_SUSPEND) {
1988 /* AHCI spec rev1.1 section 8.3.3:
1989 * Software must disable interrupts prior to requesting a
1990 * transition of the HBA to D3 state.
1991 */
1992 ctl = readl(mmio + HOST_CTL);
1993 ctl &= ~HOST_IRQ_EN;
1994 writel(ctl, mmio + HOST_CTL);
1995 readl(mmio + HOST_CTL); /* flush */
1996 }
1997
1998 return ata_pci_device_suspend(pdev, mesg);
1999 }
2000
2001 static int ahci_pci_device_resume(struct pci_dev *pdev)
2002 {
2003 struct ata_host *host = dev_get_drvdata(&pdev->dev);
2004 int rc;
2005
2006 rc = ata_pci_device_do_resume(pdev);
2007 if (rc)
2008 return rc;
2009
2010 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
2011 rc = ahci_reset_controller(host);
2012 if (rc)
2013 return rc;
2014
2015 ahci_init_controller(host);
2016 }
2017
2018 ata_host_resume(host);
2019
2020 return 0;
2021 }
2022 #endif
2023
2024 static int ahci_port_start(struct ata_port *ap)
2025 {
2026 struct device *dev = ap->host->dev;
2027 struct ahci_port_priv *pp;
2028 void *mem;
2029 dma_addr_t mem_dma;
2030 int rc;
2031
2032 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
2033 if (!pp)
2034 return -ENOMEM;
2035
2036 rc = ata_pad_alloc(ap, dev);
2037 if (rc)
2038 return rc;
2039
2040 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
2041 GFP_KERNEL);
2042 if (!mem)
2043 return -ENOMEM;
2044 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
2045
2046 /*
2047 * First item in chunk of DMA memory: 32-slot command table,
2048 * 32 bytes each in size
2049 */
2050 pp->cmd_slot = mem;
2051 pp->cmd_slot_dma = mem_dma;
2052
2053 mem += AHCI_CMD_SLOT_SZ;
2054 mem_dma += AHCI_CMD_SLOT_SZ;
2055
2056 /*
2057 * Second item: Received-FIS area
2058 */
2059 pp->rx_fis = mem;
2060 pp->rx_fis_dma = mem_dma;
2061
2062 mem += AHCI_RX_FIS_SZ;
2063 mem_dma += AHCI_RX_FIS_SZ;
2064
2065 /*
2066 * Third item: data area for storing a single command
2067 * and its scatter-gather table
2068 */
2069 pp->cmd_tbl = mem;
2070 pp->cmd_tbl_dma = mem_dma;
2071
2072 /*
2073 * Save off initial list of interrupts to be enabled.
2074 * This could be changed later
2075 */
2076 pp->intr_mask = DEF_PORT_IRQ;
2077
2078 ap->private_data = pp;
2079
2080 /* engage engines, captain */
2081 return ahci_port_resume(ap);
2082 }
2083
2084 static void ahci_port_stop(struct ata_port *ap)
2085 {
2086 const char *emsg = NULL;
2087 int rc;
2088
2089 /* de-initialize port */
2090 rc = ahci_deinit_port(ap, &emsg);
2091 if (rc)
2092 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
2093 }
2094
2095 static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
2096 {
2097 int rc;
2098
2099 if (using_dac &&
2100 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
2101 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
2102 if (rc) {
2103 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
2104 if (rc) {
2105 dev_printk(KERN_ERR, &pdev->dev,
2106 "64-bit DMA enable failed\n");
2107 return rc;
2108 }
2109 }
2110 } else {
2111 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2112 if (rc) {
2113 dev_printk(KERN_ERR, &pdev->dev,
2114 "32-bit DMA enable failed\n");
2115 return rc;
2116 }
2117 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
2118 if (rc) {
2119 dev_printk(KERN_ERR, &pdev->dev,
2120 "32-bit consistent DMA enable failed\n");
2121 return rc;
2122 }
2123 }
2124 return 0;
2125 }
2126
2127 static void ahci_print_info(struct ata_host *host)
2128 {
2129 struct ahci_host_priv *hpriv = host->private_data;
2130 struct pci_dev *pdev = to_pci_dev(host->dev);
2131 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
2132 u32 vers, cap, impl, speed;
2133 const char *speed_s;
2134 u16 cc;
2135 const char *scc_s;
2136
2137 vers = readl(mmio + HOST_VERSION);
2138 cap = hpriv->cap;
2139 impl = hpriv->port_map;
2140
2141 speed = (cap >> 20) & 0xf;
2142 if (speed == 1)
2143 speed_s = "1.5";
2144 else if (speed == 2)
2145 speed_s = "3";
2146 else
2147 speed_s = "?";
2148
2149 pci_read_config_word(pdev, 0x0a, &cc);
2150 if (cc == PCI_CLASS_STORAGE_IDE)
2151 scc_s = "IDE";
2152 else if (cc == PCI_CLASS_STORAGE_SATA)
2153 scc_s = "SATA";
2154 else if (cc == PCI_CLASS_STORAGE_RAID)
2155 scc_s = "RAID";
2156 else
2157 scc_s = "unknown";
2158
2159 dev_printk(KERN_INFO, &pdev->dev,
2160 "AHCI %02x%02x.%02x%02x "
2161 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2162 ,
2163
2164 (vers >> 24) & 0xff,
2165 (vers >> 16) & 0xff,
2166 (vers >> 8) & 0xff,
2167 vers & 0xff,
2168
2169 ((cap >> 8) & 0x1f) + 1,
2170 (cap & 0x1f) + 1,
2171 speed_s,
2172 impl,
2173 scc_s);
2174
2175 dev_printk(KERN_INFO, &pdev->dev,
2176 "flags: "
2177 "%s%s%s%s%s%s%s"
2178 "%s%s%s%s%s%s%s\n"
2179 ,
2180
2181 cap & (1 << 31) ? "64bit " : "",
2182 cap & (1 << 30) ? "ncq " : "",
2183 cap & (1 << 29) ? "sntf " : "",
2184 cap & (1 << 28) ? "ilck " : "",
2185 cap & (1 << 27) ? "stag " : "",
2186 cap & (1 << 26) ? "pm " : "",
2187 cap & (1 << 25) ? "led " : "",
2188
2189 cap & (1 << 24) ? "clo " : "",
2190 cap & (1 << 19) ? "nz " : "",
2191 cap & (1 << 18) ? "only " : "",
2192 cap & (1 << 17) ? "pmp " : "",
2193 cap & (1 << 15) ? "pio " : "",
2194 cap & (1 << 14) ? "slum " : "",
2195 cap & (1 << 13) ? "part " : ""
2196 );
2197 }
2198
2199 /* On ASUS P5W DH Deluxe, the second port of PCI device 00:1f.2 is
2200 * hardwired to on-board SIMG 4726. The chipset is ICH8 and doesn't
2201 * support PMP and the 4726 either directly exports the device
2202 * attached to the first downstream port or acts as a hardware storage
2203 * controller and emulate a single ATA device (can be RAID 0/1 or some
2204 * other configuration).
2205 *
2206 * When there's no device attached to the first downstream port of the
2207 * 4726, "Config Disk" appears, which is a pseudo ATA device to
2208 * configure the 4726. However, ATA emulation of the device is very
2209 * lame. It doesn't send signature D2H Reg FIS after the initial
2210 * hardreset, pukes on SRST w/ PMP==0 and has bunch of other issues.
2211 *
2212 * The following function works around the problem by always using
2213 * hardreset on the port and not depending on receiving signature FIS
2214 * afterward. If signature FIS isn't received soon, ATA class is
2215 * assumed without follow-up softreset.
2216 */
2217 static void ahci_p5wdh_workaround(struct ata_host *host)
2218 {
2219 static struct dmi_system_id sysids[] = {
2220 {
2221 .ident = "P5W DH Deluxe",
2222 .matches = {
2223 DMI_MATCH(DMI_SYS_VENDOR,
2224 "ASUSTEK COMPUTER INC"),
2225 DMI_MATCH(DMI_PRODUCT_NAME, "P5W DH Deluxe"),
2226 },
2227 },
2228 { }
2229 };
2230 struct pci_dev *pdev = to_pci_dev(host->dev);
2231
2232 if (pdev->bus->number == 0 && pdev->devfn == PCI_DEVFN(0x1f, 2) &&
2233 dmi_check_system(sysids)) {
2234 struct ata_port *ap = host->ports[1];
2235
2236 dev_printk(KERN_INFO, &pdev->dev, "enabling ASUS P5W DH "
2237 "Deluxe on-board SIMG4726 workaround\n");
2238
2239 ap->ops = &ahci_p5wdh_ops;
2240 ap->link.flags |= ATA_LFLAG_NO_SRST | ATA_LFLAG_ASSUME_ATA;
2241 }
2242 }
2243
2244 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
2245 {
2246 static int printed_version;
2247 struct ata_port_info pi = ahci_port_info[ent->driver_data];
2248 const struct ata_port_info *ppi[] = { &pi, NULL };
2249 struct device *dev = &pdev->dev;
2250 struct ahci_host_priv *hpriv;
2251 struct ata_host *host;
2252 int i, rc;
2253
2254 VPRINTK("ENTER\n");
2255
2256 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
2257
2258 if (!printed_version++)
2259 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
2260
2261 /* acquire resources */
2262 rc = pcim_enable_device(pdev);
2263 if (rc)
2264 return rc;
2265
2266 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
2267 if (rc == -EBUSY)
2268 pcim_pin_device(pdev);
2269 if (rc)
2270 return rc;
2271
2272 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
2273 if (!hpriv)
2274 return -ENOMEM;
2275 hpriv->flags |= (unsigned long)pi.private_data;
2276
2277 if ((hpriv->flags & AHCI_HFLAG_NO_MSI) || pci_enable_msi(pdev))
2278 pci_intx(pdev, 1);
2279
2280 /* save initial config */
2281 ahci_save_initial_config(pdev, hpriv);
2282
2283 /* prepare host */
2284 if (hpriv->cap & HOST_CAP_NCQ)
2285 pi.flags |= ATA_FLAG_NCQ;
2286
2287 if (hpriv->cap & HOST_CAP_PMP)
2288 pi.flags |= ATA_FLAG_PMP;
2289
2290 host = ata_host_alloc_pinfo(&pdev->dev, ppi, fls(hpriv->port_map));
2291 if (!host)
2292 return -ENOMEM;
2293 host->iomap = pcim_iomap_table(pdev);
2294 host->private_data = hpriv;
2295
2296 for (i = 0; i < host->n_ports; i++) {
2297 struct ata_port *ap = host->ports[i];
2298 void __iomem *port_mmio = ahci_port_base(ap);
2299
2300 ata_port_pbar_desc(ap, AHCI_PCI_BAR, -1, "abar");
2301 ata_port_pbar_desc(ap, AHCI_PCI_BAR,
2302 0x100 + ap->port_no * 0x80, "port");
2303
2304 /* set initial link pm policy */
2305 ap->pm_policy = NOT_AVAILABLE;
2306
2307 /* standard SATA port setup */
2308 if (hpriv->port_map & (1 << i))
2309 ap->ioaddr.cmd_addr = port_mmio;
2310
2311 /* disabled/not-implemented port */
2312 else
2313 ap->ops = &ata_dummy_port_ops;
2314 }
2315
2316 /* apply workaround for ASUS P5W DH Deluxe mainboard */
2317 ahci_p5wdh_workaround(host);
2318
2319 /* initialize adapter */
2320 rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
2321 if (rc)
2322 return rc;
2323
2324 rc = ahci_reset_controller(host);
2325 if (rc)
2326 return rc;
2327
2328 ahci_init_controller(host);
2329 ahci_print_info(host);
2330
2331 pci_set_master(pdev);
2332 return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
2333 &ahci_sht);
2334 }
2335
2336 static int __init ahci_init(void)
2337 {
2338 return pci_register_driver(&ahci_pci_driver);
2339 }
2340
2341 static void __exit ahci_exit(void)
2342 {
2343 pci_unregister_driver(&ahci_pci_driver);
2344 }
2345
2346
2347 MODULE_AUTHOR("Jeff Garzik");
2348 MODULE_DESCRIPTION("AHCI SATA low-level driver");
2349 MODULE_LICENSE("GPL");
2350 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
2351 MODULE_VERSION(DRV_VERSION);
2352
2353 module_init(ahci_init);
2354 module_exit(ahci_exit);
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