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libata: add deadline support to prereset and reset methods
[deliverable/linux.git] / drivers / ata / ahci.c
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 <scsi/scsi_host.h>
45 #include <scsi/scsi_cmnd.h>
46 #include <linux/libata.h>
47
48 #define DRV_NAME "ahci"
49 #define DRV_VERSION "2.1"
50
51
52 enum {
53 AHCI_PCI_BAR = 5,
54 AHCI_MAX_PORTS = 32,
55 AHCI_MAX_SG = 168, /* hardware max is 64K */
56 AHCI_DMA_BOUNDARY = 0xffffffff,
57 AHCI_USE_CLUSTERING = 0,
58 AHCI_MAX_CMDS = 32,
59 AHCI_CMD_SZ = 32,
60 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
61 AHCI_RX_FIS_SZ = 256,
62 AHCI_CMD_TBL_CDB = 0x40,
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 +
67 AHCI_RX_FIS_SZ,
68 AHCI_IRQ_ON_SG = (1 << 31),
69 AHCI_CMD_ATAPI = (1 << 5),
70 AHCI_CMD_WRITE = (1 << 6),
71 AHCI_CMD_PREFETCH = (1 << 7),
72 AHCI_CMD_RESET = (1 << 8),
73 AHCI_CMD_CLR_BUSY = (1 << 10),
74
75 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
76 RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
77 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
78
79 board_ahci = 0,
80 board_ahci_pi = 1,
81 board_ahci_vt8251 = 2,
82 board_ahci_ign_iferr = 3,
83 board_ahci_sb600 = 4,
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 */
98 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
99 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
100 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
101 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
102 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
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
141 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
142 PORT_IRQ_IF_ERR |
143 PORT_IRQ_CONNECT |
144 PORT_IRQ_PHYRDY |
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,
152
153 /* PORT_CMD bits */
154 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
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 */
158 PORT_CMD_CLO = (1 << 3), /* Command list override */
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
163 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
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 */
167
168 /* ap->flags bits */
169 AHCI_FLAG_NO_NCQ = (1 << 24),
170 AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */
171 AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */
172 AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */
173
174 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
175 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
176 ATA_FLAG_SKIP_D2H_BSY,
177 };
178
179 struct ahci_cmd_hdr {
180 u32 opts;
181 u32 status;
182 u32 tbl_addr;
183 u32 tbl_addr_hi;
184 u32 reserved[4];
185 };
186
187 struct ahci_sg {
188 u32 addr;
189 u32 addr_hi;
190 u32 reserved;
191 u32 flags_size;
192 };
193
194 struct ahci_host_priv {
195 u32 cap; /* cap to use */
196 u32 port_map; /* port map to use */
197 u32 saved_cap; /* saved initial cap */
198 u32 saved_port_map; /* saved initial port_map */
199 };
200
201 struct ahci_port_priv {
202 struct ahci_cmd_hdr *cmd_slot;
203 dma_addr_t cmd_slot_dma;
204 void *cmd_tbl;
205 dma_addr_t cmd_tbl_dma;
206 void *rx_fis;
207 dma_addr_t rx_fis_dma;
208 /* for NCQ spurious interrupt analysis */
209 unsigned int ncq_saw_d2h:1;
210 unsigned int ncq_saw_dmas:1;
211 unsigned int ncq_saw_sdb:1;
212 };
213
214 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
215 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
216 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
217 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
218 static void ahci_irq_clear(struct ata_port *ap);
219 static int ahci_port_start(struct ata_port *ap);
220 static void ahci_port_stop(struct ata_port *ap);
221 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
222 static void ahci_qc_prep(struct ata_queued_cmd *qc);
223 static u8 ahci_check_status(struct ata_port *ap);
224 static void ahci_freeze(struct ata_port *ap);
225 static void ahci_thaw(struct ata_port *ap);
226 static void ahci_error_handler(struct ata_port *ap);
227 static void ahci_vt8251_error_handler(struct ata_port *ap);
228 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
229 #ifdef CONFIG_PM
230 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
231 static int ahci_port_resume(struct ata_port *ap);
232 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
233 static int ahci_pci_device_resume(struct pci_dev *pdev);
234 #endif
235
236 static struct scsi_host_template ahci_sht = {
237 .module = THIS_MODULE,
238 .name = DRV_NAME,
239 .ioctl = ata_scsi_ioctl,
240 .queuecommand = ata_scsi_queuecmd,
241 .change_queue_depth = ata_scsi_change_queue_depth,
242 .can_queue = AHCI_MAX_CMDS - 1,
243 .this_id = ATA_SHT_THIS_ID,
244 .sg_tablesize = AHCI_MAX_SG,
245 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
246 .emulated = ATA_SHT_EMULATED,
247 .use_clustering = AHCI_USE_CLUSTERING,
248 .proc_name = DRV_NAME,
249 .dma_boundary = AHCI_DMA_BOUNDARY,
250 .slave_configure = ata_scsi_slave_config,
251 .slave_destroy = ata_scsi_slave_destroy,
252 .bios_param = ata_std_bios_param,
253 #ifdef CONFIG_PM
254 .suspend = ata_scsi_device_suspend,
255 .resume = ata_scsi_device_resume,
256 #endif
257 };
258
259 static const struct ata_port_operations ahci_ops = {
260 .port_disable = ata_port_disable,
261
262 .check_status = ahci_check_status,
263 .check_altstatus = ahci_check_status,
264 .dev_select = ata_noop_dev_select,
265
266 .tf_read = ahci_tf_read,
267
268 .qc_prep = ahci_qc_prep,
269 .qc_issue = ahci_qc_issue,
270
271 .irq_clear = ahci_irq_clear,
272 .irq_on = ata_dummy_irq_on,
273 .irq_ack = ata_dummy_irq_ack,
274
275 .scr_read = ahci_scr_read,
276 .scr_write = ahci_scr_write,
277
278 .freeze = ahci_freeze,
279 .thaw = ahci_thaw,
280
281 .error_handler = ahci_error_handler,
282 .post_internal_cmd = ahci_post_internal_cmd,
283
284 #ifdef CONFIG_PM
285 .port_suspend = ahci_port_suspend,
286 .port_resume = ahci_port_resume,
287 #endif
288
289 .port_start = ahci_port_start,
290 .port_stop = ahci_port_stop,
291 };
292
293 static const struct ata_port_operations ahci_vt8251_ops = {
294 .port_disable = ata_port_disable,
295
296 .check_status = ahci_check_status,
297 .check_altstatus = ahci_check_status,
298 .dev_select = ata_noop_dev_select,
299
300 .tf_read = ahci_tf_read,
301
302 .qc_prep = ahci_qc_prep,
303 .qc_issue = ahci_qc_issue,
304
305 .irq_clear = ahci_irq_clear,
306 .irq_on = ata_dummy_irq_on,
307 .irq_ack = ata_dummy_irq_ack,
308
309 .scr_read = ahci_scr_read,
310 .scr_write = ahci_scr_write,
311
312 .freeze = ahci_freeze,
313 .thaw = ahci_thaw,
314
315 .error_handler = ahci_vt8251_error_handler,
316 .post_internal_cmd = ahci_post_internal_cmd,
317
318 #ifdef CONFIG_PM
319 .port_suspend = ahci_port_suspend,
320 .port_resume = ahci_port_resume,
321 #endif
322
323 .port_start = ahci_port_start,
324 .port_stop = ahci_port_stop,
325 };
326
327 static const struct ata_port_info ahci_port_info[] = {
328 /* board_ahci */
329 {
330 .flags = AHCI_FLAG_COMMON,
331 .pio_mask = 0x1f, /* pio0-4 */
332 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
333 .port_ops = &ahci_ops,
334 },
335 /* board_ahci_pi */
336 {
337 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_HONOR_PI,
338 .pio_mask = 0x1f, /* pio0-4 */
339 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
340 .port_ops = &ahci_ops,
341 },
342 /* board_ahci_vt8251 */
343 {
344 .flags = AHCI_FLAG_COMMON | ATA_FLAG_HRST_TO_RESUME |
345 AHCI_FLAG_NO_NCQ,
346 .pio_mask = 0x1f, /* pio0-4 */
347 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
348 .port_ops = &ahci_vt8251_ops,
349 },
350 /* board_ahci_ign_iferr */
351 {
352 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_IGN_IRQ_IF_ERR,
353 .pio_mask = 0x1f, /* pio0-4 */
354 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
355 .port_ops = &ahci_ops,
356 },
357 /* board_ahci_sb600 */
358 {
359 .flags = AHCI_FLAG_COMMON |
360 AHCI_FLAG_IGN_SERR_INTERNAL,
361 .pio_mask = 0x1f, /* pio0-4 */
362 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
363 .port_ops = &ahci_ops,
364 },
365 };
366
367 static const struct pci_device_id ahci_pci_tbl[] = {
368 /* Intel */
369 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
370 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
371 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
372 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
373 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
374 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
375 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
376 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
377 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
378 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
379 { PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */
380 { PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */
381 { PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */
382 { PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */
383 { PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */
384 { PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */
385 { PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */
386 { PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */
387 { PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */
388 { PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */
389 { PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */
390 { PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */
391 { PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */
392 { PCI_VDEVICE(INTEL, 0x292c), board_ahci_pi }, /* ICH9M */
393 { PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */
394 { PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */
395 { PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */
396
397 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
398 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
399 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
400
401 /* ATI */
402 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
403
404 /* VIA */
405 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
406 { PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */
407
408 /* NVIDIA */
409 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
410 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
411 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
412 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
413 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
414 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
415 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
416 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
417 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
418 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
419 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
420 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
421 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
422 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
423 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
424 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
425 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
426 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
427 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
428 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
429
430 /* SiS */
431 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
432 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
433 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
434
435 /* Generic, PCI class code for AHCI */
436 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
437 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
438
439 { } /* terminate list */
440 };
441
442
443 static struct pci_driver ahci_pci_driver = {
444 .name = DRV_NAME,
445 .id_table = ahci_pci_tbl,
446 .probe = ahci_init_one,
447 .remove = ata_pci_remove_one,
448 #ifdef CONFIG_PM
449 .suspend = ahci_pci_device_suspend,
450 .resume = ahci_pci_device_resume,
451 #endif
452 };
453
454
455 static inline int ahci_nr_ports(u32 cap)
456 {
457 return (cap & 0x1f) + 1;
458 }
459
460 static inline void __iomem *ahci_port_base(struct ata_port *ap)
461 {
462 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
463
464 return mmio + 0x100 + (ap->port_no * 0x80);
465 }
466
467 /**
468 * ahci_save_initial_config - Save and fixup initial config values
469 * @pdev: target PCI device
470 * @pi: associated ATA port info
471 * @hpriv: host private area to store config values
472 *
473 * Some registers containing configuration info might be setup by
474 * BIOS and might be cleared on reset. This function saves the
475 * initial values of those registers into @hpriv such that they
476 * can be restored after controller reset.
477 *
478 * If inconsistent, config values are fixed up by this function.
479 *
480 * LOCKING:
481 * None.
482 */
483 static void ahci_save_initial_config(struct pci_dev *pdev,
484 const struct ata_port_info *pi,
485 struct ahci_host_priv *hpriv)
486 {
487 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
488 u32 cap, port_map;
489 int i;
490
491 /* Values prefixed with saved_ are written back to host after
492 * reset. Values without are used for driver operation.
493 */
494 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
495 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
496
497 /* fixup zero port_map */
498 if (!port_map) {
499 port_map = (1 << ahci_nr_ports(hpriv->cap)) - 1;
500 dev_printk(KERN_WARNING, &pdev->dev,
501 "PORTS_IMPL is zero, forcing 0x%x\n", port_map);
502
503 /* write the fixed up value to the PI register */
504 hpriv->saved_port_map = port_map;
505 }
506
507 /* cross check port_map and cap.n_ports */
508 if (pi->flags & AHCI_FLAG_HONOR_PI) {
509 u32 tmp_port_map = port_map;
510 int n_ports = ahci_nr_ports(cap);
511
512 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
513 if (tmp_port_map & (1 << i)) {
514 n_ports--;
515 tmp_port_map &= ~(1 << i);
516 }
517 }
518
519 /* Whine if inconsistent. No need to update cap.
520 * port_map is used to determine number of ports.
521 */
522 if (n_ports || tmp_port_map)
523 dev_printk(KERN_WARNING, &pdev->dev,
524 "nr_ports (%u) and implemented port map "
525 "(0x%x) don't match\n",
526 ahci_nr_ports(cap), port_map);
527 } else {
528 /* fabricate port_map from cap.nr_ports */
529 port_map = (1 << ahci_nr_ports(cap)) - 1;
530 }
531
532 /* record values to use during operation */
533 hpriv->cap = cap;
534 hpriv->port_map = port_map;
535 }
536
537 /**
538 * ahci_restore_initial_config - Restore initial config
539 * @host: target ATA host
540 *
541 * Restore initial config stored by ahci_save_initial_config().
542 *
543 * LOCKING:
544 * None.
545 */
546 static void ahci_restore_initial_config(struct ata_host *host)
547 {
548 struct ahci_host_priv *hpriv = host->private_data;
549 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
550
551 writel(hpriv->saved_cap, mmio + HOST_CAP);
552 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
553 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
554 }
555
556 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
557 {
558 unsigned int sc_reg;
559
560 switch (sc_reg_in) {
561 case SCR_STATUS: sc_reg = 0; break;
562 case SCR_CONTROL: sc_reg = 1; break;
563 case SCR_ERROR: sc_reg = 2; break;
564 case SCR_ACTIVE: sc_reg = 3; break;
565 default:
566 return 0xffffffffU;
567 }
568
569 return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
570 }
571
572
573 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
574 u32 val)
575 {
576 unsigned int sc_reg;
577
578 switch (sc_reg_in) {
579 case SCR_STATUS: sc_reg = 0; break;
580 case SCR_CONTROL: sc_reg = 1; break;
581 case SCR_ERROR: sc_reg = 2; break;
582 case SCR_ACTIVE: sc_reg = 3; break;
583 default:
584 return;
585 }
586
587 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
588 }
589
590 static void ahci_start_engine(struct ata_port *ap)
591 {
592 void __iomem *port_mmio = ahci_port_base(ap);
593 u32 tmp;
594
595 /* start DMA */
596 tmp = readl(port_mmio + PORT_CMD);
597 tmp |= PORT_CMD_START;
598 writel(tmp, port_mmio + PORT_CMD);
599 readl(port_mmio + PORT_CMD); /* flush */
600 }
601
602 static int ahci_stop_engine(struct ata_port *ap)
603 {
604 void __iomem *port_mmio = ahci_port_base(ap);
605 u32 tmp;
606
607 tmp = readl(port_mmio + PORT_CMD);
608
609 /* check if the HBA is idle */
610 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
611 return 0;
612
613 /* setting HBA to idle */
614 tmp &= ~PORT_CMD_START;
615 writel(tmp, port_mmio + PORT_CMD);
616
617 /* wait for engine to stop. This could be as long as 500 msec */
618 tmp = ata_wait_register(port_mmio + PORT_CMD,
619 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
620 if (tmp & PORT_CMD_LIST_ON)
621 return -EIO;
622
623 return 0;
624 }
625
626 static void ahci_start_fis_rx(struct ata_port *ap)
627 {
628 void __iomem *port_mmio = ahci_port_base(ap);
629 struct ahci_host_priv *hpriv = ap->host->private_data;
630 struct ahci_port_priv *pp = ap->private_data;
631 u32 tmp;
632
633 /* set FIS registers */
634 if (hpriv->cap & HOST_CAP_64)
635 writel((pp->cmd_slot_dma >> 16) >> 16,
636 port_mmio + PORT_LST_ADDR_HI);
637 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
638
639 if (hpriv->cap & HOST_CAP_64)
640 writel((pp->rx_fis_dma >> 16) >> 16,
641 port_mmio + PORT_FIS_ADDR_HI);
642 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
643
644 /* enable FIS reception */
645 tmp = readl(port_mmio + PORT_CMD);
646 tmp |= PORT_CMD_FIS_RX;
647 writel(tmp, port_mmio + PORT_CMD);
648
649 /* flush */
650 readl(port_mmio + PORT_CMD);
651 }
652
653 static int ahci_stop_fis_rx(struct ata_port *ap)
654 {
655 void __iomem *port_mmio = ahci_port_base(ap);
656 u32 tmp;
657
658 /* disable FIS reception */
659 tmp = readl(port_mmio + PORT_CMD);
660 tmp &= ~PORT_CMD_FIS_RX;
661 writel(tmp, port_mmio + PORT_CMD);
662
663 /* wait for completion, spec says 500ms, give it 1000 */
664 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
665 PORT_CMD_FIS_ON, 10, 1000);
666 if (tmp & PORT_CMD_FIS_ON)
667 return -EBUSY;
668
669 return 0;
670 }
671
672 static void ahci_power_up(struct ata_port *ap)
673 {
674 struct ahci_host_priv *hpriv = ap->host->private_data;
675 void __iomem *port_mmio = ahci_port_base(ap);
676 u32 cmd;
677
678 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
679
680 /* spin up device */
681 if (hpriv->cap & HOST_CAP_SSS) {
682 cmd |= PORT_CMD_SPIN_UP;
683 writel(cmd, port_mmio + PORT_CMD);
684 }
685
686 /* wake up link */
687 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
688 }
689
690 #ifdef CONFIG_PM
691 static void ahci_power_down(struct ata_port *ap)
692 {
693 struct ahci_host_priv *hpriv = ap->host->private_data;
694 void __iomem *port_mmio = ahci_port_base(ap);
695 u32 cmd, scontrol;
696
697 if (!(hpriv->cap & HOST_CAP_SSS))
698 return;
699
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);
704
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);
709 }
710 #endif
711
712 static void ahci_init_port(struct ata_port *ap)
713 {
714 /* enable FIS reception */
715 ahci_start_fis_rx(ap);
716
717 /* enable DMA */
718 ahci_start_engine(ap);
719 }
720
721 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
722 {
723 int rc;
724
725 /* disable DMA */
726 rc = ahci_stop_engine(ap);
727 if (rc) {
728 *emsg = "failed to stop engine";
729 return rc;
730 }
731
732 /* disable FIS reception */
733 rc = ahci_stop_fis_rx(ap);
734 if (rc) {
735 *emsg = "failed stop FIS RX";
736 return rc;
737 }
738
739 return 0;
740 }
741
742 static int ahci_reset_controller(struct ata_host *host)
743 {
744 struct pci_dev *pdev = to_pci_dev(host->dev);
745 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
746 u32 tmp;
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, host->dev,
763 "controller reset failed (0x%x)\n", tmp);
764 return -EIO;
765 }
766
767 /* turn on AHCI mode */
768 writel(HOST_AHCI_EN, mmio + HOST_CTL);
769 (void) readl(mmio + HOST_CTL); /* flush */
770
771 /* some registers might be cleared on reset. restore initial values */
772 ahci_restore_initial_config(host);
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
786 static void ahci_init_controller(struct ata_host *host)
787 {
788 struct pci_dev *pdev = to_pci_dev(host->dev);
789 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
790 int i, rc;
791 u32 tmp;
792
793 for (i = 0; i < host->n_ports; i++) {
794 struct ata_port *ap = host->ports[i];
795 void __iomem *port_mmio = ahci_port_base(ap);
796 const char *emsg = NULL;
797
798 if (ata_port_is_dummy(ap))
799 continue;
800
801 /* make sure port is not active */
802 rc = ahci_deinit_port(ap, &emsg);
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
812 /* clear port IRQ */
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);
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
828 static unsigned int ahci_dev_classify(struct ata_port *ap)
829 {
830 void __iomem *port_mmio = ahci_port_base(ap);
831 struct ata_taskfile tf;
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
843 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
844 u32 opts)
845 {
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);
854 }
855
856 static int ahci_clo(struct ata_port *ap)
857 {
858 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
859 struct ahci_host_priv *hpriv = ap->host->private_data;
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
877 static int ahci_softreset(struct ata_port *ap, unsigned int *class,
878 unsigned long deadline)
879 {
880 struct ahci_port_priv *pp = ap->private_data;
881 void __iomem *port_mmio = ahci_port_base(ap);
882 const u32 cmd_fis_len = 5; /* five dwords */
883 const char *reason = NULL;
884 struct ata_taskfile tf;
885 u32 tmp;
886 u8 *fis;
887 int rc;
888
889 DPRINTK("ENTER\n");
890
891 if (ata_port_offline(ap)) {
892 DPRINTK("PHY reports no device\n");
893 *class = ATA_DEV_NONE;
894 return 0;
895 }
896
897 /* prepare for SRST (AHCI-1.1 10.4.1) */
898 rc = ahci_stop_engine(ap);
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 */
905 if (ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ)) {
906 rc = ahci_clo(ap);
907
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";
913 goto fail_restart;
914 }
915 }
916
917 /* restart engine */
918 ahci_start_engine(ap);
919
920 ata_tf_init(ap->device, &tf);
921 fis = pp->cmd_tbl;
922
923 /* issue the first D2H Register FIS */
924 ahci_fill_cmd_slot(pp, 0,
925 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
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);
932
933 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
934 if (tmp & 0x1) {
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 */
944 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
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;
964 if (ata_port_online(ap)) {
965 rc = ata_wait_ready(ap, deadline);
966 if (rc && rc != -ENODEV) {
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:
977 ahci_start_engine(ap);
978 fail:
979 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
980 return rc;
981 }
982
983 static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
984 unsigned long deadline)
985 {
986 struct ahci_port_priv *pp = ap->private_data;
987 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
988 struct ata_taskfile tf;
989 int rc;
990
991 DPRINTK("ENTER\n");
992
993 ahci_stop_engine(ap);
994
995 /* clear D2H reception area to properly wait for D2H FIS */
996 ata_tf_init(ap->device, &tf);
997 tf.command = 0x80;
998 ata_tf_to_fis(&tf, d2h_fis, 0);
999
1000 rc = sata_std_hardreset(ap, class, deadline);
1001
1002 ahci_start_engine(ap);
1003
1004 if (rc == 0 && ata_port_online(ap))
1005 *class = ahci_dev_classify(ap);
1006 if (*class == ATA_DEV_UNKNOWN)
1007 *class = ATA_DEV_NONE;
1008
1009 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1010 return rc;
1011 }
1012
1013 static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
1014 unsigned long deadline)
1015 {
1016 int rc;
1017
1018 DPRINTK("ENTER\n");
1019
1020 ahci_stop_engine(ap);
1021
1022 rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context),
1023 deadline);
1024
1025 /* vt8251 needs SError cleared for the port to operate */
1026 ahci_scr_write(ap, SCR_ERROR, ahci_scr_read(ap, SCR_ERROR));
1027
1028 ahci_start_engine(ap);
1029
1030 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1031
1032 /* vt8251 doesn't clear BSY on signature FIS reception,
1033 * request follow-up softreset.
1034 */
1035 return rc ?: -EAGAIN;
1036 }
1037
1038 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
1039 {
1040 void __iomem *port_mmio = ahci_port_base(ap);
1041 u32 new_tmp, tmp;
1042
1043 ata_std_postreset(ap, class);
1044
1045 /* Make sure port's ATAPI bit is set appropriately */
1046 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1047 if (*class == ATA_DEV_ATAPI)
1048 new_tmp |= PORT_CMD_ATAPI;
1049 else
1050 new_tmp &= ~PORT_CMD_ATAPI;
1051 if (new_tmp != tmp) {
1052 writel(new_tmp, port_mmio + PORT_CMD);
1053 readl(port_mmio + PORT_CMD); /* flush */
1054 }
1055 }
1056
1057 static u8 ahci_check_status(struct ata_port *ap)
1058 {
1059 void __iomem *mmio = ap->ioaddr.cmd_addr;
1060
1061 return readl(mmio + PORT_TFDATA) & 0xFF;
1062 }
1063
1064 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
1065 {
1066 struct ahci_port_priv *pp = ap->private_data;
1067 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1068
1069 ata_tf_from_fis(d2h_fis, tf);
1070 }
1071
1072 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1073 {
1074 struct scatterlist *sg;
1075 struct ahci_sg *ahci_sg;
1076 unsigned int n_sg = 0;
1077
1078 VPRINTK("ENTER\n");
1079
1080 /*
1081 * Next, the S/G list.
1082 */
1083 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1084 ata_for_each_sg(sg, qc) {
1085 dma_addr_t addr = sg_dma_address(sg);
1086 u32 sg_len = sg_dma_len(sg);
1087
1088 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1089 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1090 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
1091
1092 ahci_sg++;
1093 n_sg++;
1094 }
1095
1096 return n_sg;
1097 }
1098
1099 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1100 {
1101 struct ata_port *ap = qc->ap;
1102 struct ahci_port_priv *pp = ap->private_data;
1103 int is_atapi = is_atapi_taskfile(&qc->tf);
1104 void *cmd_tbl;
1105 u32 opts;
1106 const u32 cmd_fis_len = 5; /* five dwords */
1107 unsigned int n_elem;
1108
1109 /*
1110 * Fill in command table information. First, the header,
1111 * a SATA Register - Host to Device command FIS.
1112 */
1113 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1114
1115 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
1116 if (is_atapi) {
1117 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1118 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1119 }
1120
1121 n_elem = 0;
1122 if (qc->flags & ATA_QCFLAG_DMAMAP)
1123 n_elem = ahci_fill_sg(qc, cmd_tbl);
1124
1125 /*
1126 * Fill in command slot information.
1127 */
1128 opts = cmd_fis_len | n_elem << 16;
1129 if (qc->tf.flags & ATA_TFLAG_WRITE)
1130 opts |= AHCI_CMD_WRITE;
1131 if (is_atapi)
1132 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1133
1134 ahci_fill_cmd_slot(pp, qc->tag, opts);
1135 }
1136
1137 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1138 {
1139 struct ahci_port_priv *pp = ap->private_data;
1140 struct ata_eh_info *ehi = &ap->eh_info;
1141 unsigned int err_mask = 0, action = 0;
1142 struct ata_queued_cmd *qc;
1143 u32 serror;
1144
1145 ata_ehi_clear_desc(ehi);
1146
1147 /* AHCI needs SError cleared; otherwise, it might lock up */
1148 serror = ahci_scr_read(ap, SCR_ERROR);
1149 ahci_scr_write(ap, SCR_ERROR, serror);
1150
1151 /* analyze @irq_stat */
1152 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1153
1154 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1155 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1156 irq_stat &= ~PORT_IRQ_IF_ERR;
1157
1158 if (irq_stat & PORT_IRQ_TF_ERR) {
1159 err_mask |= AC_ERR_DEV;
1160 if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
1161 serror &= ~SERR_INTERNAL;
1162 }
1163
1164 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1165 err_mask |= AC_ERR_HOST_BUS;
1166 action |= ATA_EH_SOFTRESET;
1167 }
1168
1169 if (irq_stat & PORT_IRQ_IF_ERR) {
1170 err_mask |= AC_ERR_ATA_BUS;
1171 action |= ATA_EH_SOFTRESET;
1172 ata_ehi_push_desc(ehi, ", interface fatal error");
1173 }
1174
1175 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1176 ata_ehi_hotplugged(ehi);
1177 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
1178 "connection status changed" : "PHY RDY changed");
1179 }
1180
1181 if (irq_stat & PORT_IRQ_UNK_FIS) {
1182 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1183
1184 err_mask |= AC_ERR_HSM;
1185 action |= ATA_EH_SOFTRESET;
1186 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
1187 unk[0], unk[1], unk[2], unk[3]);
1188 }
1189
1190 /* okay, let's hand over to EH */
1191 ehi->serror |= serror;
1192 ehi->action |= action;
1193
1194 qc = ata_qc_from_tag(ap, ap->active_tag);
1195 if (qc)
1196 qc->err_mask |= err_mask;
1197 else
1198 ehi->err_mask |= err_mask;
1199
1200 if (irq_stat & PORT_IRQ_FREEZE)
1201 ata_port_freeze(ap);
1202 else
1203 ata_port_abort(ap);
1204 }
1205
1206 static void ahci_host_intr(struct ata_port *ap)
1207 {
1208 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1209 struct ata_eh_info *ehi = &ap->eh_info;
1210 struct ahci_port_priv *pp = ap->private_data;
1211 u32 status, qc_active;
1212 int rc, known_irq = 0;
1213
1214 status = readl(port_mmio + PORT_IRQ_STAT);
1215 writel(status, port_mmio + PORT_IRQ_STAT);
1216
1217 if (unlikely(status & PORT_IRQ_ERROR)) {
1218 ahci_error_intr(ap, status);
1219 return;
1220 }
1221
1222 if (ap->sactive)
1223 qc_active = readl(port_mmio + PORT_SCR_ACT);
1224 else
1225 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1226
1227 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1228 if (rc > 0)
1229 return;
1230 if (rc < 0) {
1231 ehi->err_mask |= AC_ERR_HSM;
1232 ehi->action |= ATA_EH_SOFTRESET;
1233 ata_port_freeze(ap);
1234 return;
1235 }
1236
1237 /* hmmm... a spurious interupt */
1238
1239 /* if !NCQ, ignore. No modern ATA device has broken HSM
1240 * implementation for non-NCQ commands.
1241 */
1242 if (!ap->sactive)
1243 return;
1244
1245 if (status & PORT_IRQ_D2H_REG_FIS) {
1246 if (!pp->ncq_saw_d2h)
1247 ata_port_printk(ap, KERN_INFO,
1248 "D2H reg with I during NCQ, "
1249 "this message won't be printed again\n");
1250 pp->ncq_saw_d2h = 1;
1251 known_irq = 1;
1252 }
1253
1254 if (status & PORT_IRQ_DMAS_FIS) {
1255 if (!pp->ncq_saw_dmas)
1256 ata_port_printk(ap, KERN_INFO,
1257 "DMAS FIS during NCQ, "
1258 "this message won't be printed again\n");
1259 pp->ncq_saw_dmas = 1;
1260 known_irq = 1;
1261 }
1262
1263 if (status & PORT_IRQ_SDB_FIS) {
1264 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1265
1266 if (le32_to_cpu(f[1])) {
1267 /* SDB FIS containing spurious completions
1268 * might be dangerous, whine and fail commands
1269 * with HSM violation. EH will turn off NCQ
1270 * after several such failures.
1271 */
1272 ata_ehi_push_desc(ehi,
1273 "spurious completions during NCQ "
1274 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1275 readl(port_mmio + PORT_CMD_ISSUE),
1276 readl(port_mmio + PORT_SCR_ACT),
1277 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1278 ehi->err_mask |= AC_ERR_HSM;
1279 ehi->action |= ATA_EH_SOFTRESET;
1280 ata_port_freeze(ap);
1281 } else {
1282 if (!pp->ncq_saw_sdb)
1283 ata_port_printk(ap, KERN_INFO,
1284 "spurious SDB FIS %08x:%08x during NCQ, "
1285 "this message won't be printed again\n",
1286 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1287 pp->ncq_saw_sdb = 1;
1288 }
1289 known_irq = 1;
1290 }
1291
1292 if (!known_irq)
1293 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1294 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1295 status, ap->active_tag, ap->sactive);
1296 }
1297
1298 static void ahci_irq_clear(struct ata_port *ap)
1299 {
1300 /* TODO */
1301 }
1302
1303 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1304 {
1305 struct ata_host *host = dev_instance;
1306 struct ahci_host_priv *hpriv;
1307 unsigned int i, handled = 0;
1308 void __iomem *mmio;
1309 u32 irq_stat, irq_ack = 0;
1310
1311 VPRINTK("ENTER\n");
1312
1313 hpriv = host->private_data;
1314 mmio = host->iomap[AHCI_PCI_BAR];
1315
1316 /* sigh. 0xffffffff is a valid return from h/w */
1317 irq_stat = readl(mmio + HOST_IRQ_STAT);
1318 irq_stat &= hpriv->port_map;
1319 if (!irq_stat)
1320 return IRQ_NONE;
1321
1322 spin_lock(&host->lock);
1323
1324 for (i = 0; i < host->n_ports; i++) {
1325 struct ata_port *ap;
1326
1327 if (!(irq_stat & (1 << i)))
1328 continue;
1329
1330 ap = host->ports[i];
1331 if (ap) {
1332 ahci_host_intr(ap);
1333 VPRINTK("port %u\n", i);
1334 } else {
1335 VPRINTK("port %u (no irq)\n", i);
1336 if (ata_ratelimit())
1337 dev_printk(KERN_WARNING, host->dev,
1338 "interrupt on disabled port %u\n", i);
1339 }
1340
1341 irq_ack |= (1 << i);
1342 }
1343
1344 if (irq_ack) {
1345 writel(irq_ack, mmio + HOST_IRQ_STAT);
1346 handled = 1;
1347 }
1348
1349 spin_unlock(&host->lock);
1350
1351 VPRINTK("EXIT\n");
1352
1353 return IRQ_RETVAL(handled);
1354 }
1355
1356 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1357 {
1358 struct ata_port *ap = qc->ap;
1359 void __iomem *port_mmio = ahci_port_base(ap);
1360
1361 if (qc->tf.protocol == ATA_PROT_NCQ)
1362 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1363 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1364 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1365
1366 return 0;
1367 }
1368
1369 static void ahci_freeze(struct ata_port *ap)
1370 {
1371 void __iomem *port_mmio = ahci_port_base(ap);
1372
1373 /* turn IRQ off */
1374 writel(0, port_mmio + PORT_IRQ_MASK);
1375 }
1376
1377 static void ahci_thaw(struct ata_port *ap)
1378 {
1379 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1380 void __iomem *port_mmio = ahci_port_base(ap);
1381 u32 tmp;
1382
1383 /* clear IRQ */
1384 tmp = readl(port_mmio + PORT_IRQ_STAT);
1385 writel(tmp, port_mmio + PORT_IRQ_STAT);
1386 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1387
1388 /* turn IRQ back on */
1389 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1390 }
1391
1392 static void ahci_error_handler(struct ata_port *ap)
1393 {
1394 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1395 /* restart engine */
1396 ahci_stop_engine(ap);
1397 ahci_start_engine(ap);
1398 }
1399
1400 /* perform recovery */
1401 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
1402 ahci_postreset);
1403 }
1404
1405 static void ahci_vt8251_error_handler(struct ata_port *ap)
1406 {
1407 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1408 /* restart engine */
1409 ahci_stop_engine(ap);
1410 ahci_start_engine(ap);
1411 }
1412
1413 /* perform recovery */
1414 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1415 ahci_postreset);
1416 }
1417
1418 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1419 {
1420 struct ata_port *ap = qc->ap;
1421
1422 if (qc->flags & ATA_QCFLAG_FAILED) {
1423 /* make DMA engine forget about the failed command */
1424 ahci_stop_engine(ap);
1425 ahci_start_engine(ap);
1426 }
1427 }
1428
1429 #ifdef CONFIG_PM
1430 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1431 {
1432 const char *emsg = NULL;
1433 int rc;
1434
1435 rc = ahci_deinit_port(ap, &emsg);
1436 if (rc == 0)
1437 ahci_power_down(ap);
1438 else {
1439 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1440 ahci_init_port(ap);
1441 }
1442
1443 return rc;
1444 }
1445
1446 static int ahci_port_resume(struct ata_port *ap)
1447 {
1448 ahci_power_up(ap);
1449 ahci_init_port(ap);
1450
1451 return 0;
1452 }
1453
1454 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1455 {
1456 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1457 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1458 u32 ctl;
1459
1460 if (mesg.event == PM_EVENT_SUSPEND) {
1461 /* AHCI spec rev1.1 section 8.3.3:
1462 * Software must disable interrupts prior to requesting a
1463 * transition of the HBA to D3 state.
1464 */
1465 ctl = readl(mmio + HOST_CTL);
1466 ctl &= ~HOST_IRQ_EN;
1467 writel(ctl, mmio + HOST_CTL);
1468 readl(mmio + HOST_CTL); /* flush */
1469 }
1470
1471 return ata_pci_device_suspend(pdev, mesg);
1472 }
1473
1474 static int ahci_pci_device_resume(struct pci_dev *pdev)
1475 {
1476 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1477 int rc;
1478
1479 rc = ata_pci_device_do_resume(pdev);
1480 if (rc)
1481 return rc;
1482
1483 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1484 rc = ahci_reset_controller(host);
1485 if (rc)
1486 return rc;
1487
1488 ahci_init_controller(host);
1489 }
1490
1491 ata_host_resume(host);
1492
1493 return 0;
1494 }
1495 #endif
1496
1497 static int ahci_port_start(struct ata_port *ap)
1498 {
1499 struct device *dev = ap->host->dev;
1500 struct ahci_port_priv *pp;
1501 void *mem;
1502 dma_addr_t mem_dma;
1503 int rc;
1504
1505 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1506 if (!pp)
1507 return -ENOMEM;
1508
1509 rc = ata_pad_alloc(ap, dev);
1510 if (rc)
1511 return rc;
1512
1513 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1514 GFP_KERNEL);
1515 if (!mem)
1516 return -ENOMEM;
1517 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1518
1519 /*
1520 * First item in chunk of DMA memory: 32-slot command table,
1521 * 32 bytes each in size
1522 */
1523 pp->cmd_slot = mem;
1524 pp->cmd_slot_dma = mem_dma;
1525
1526 mem += AHCI_CMD_SLOT_SZ;
1527 mem_dma += AHCI_CMD_SLOT_SZ;
1528
1529 /*
1530 * Second item: Received-FIS area
1531 */
1532 pp->rx_fis = mem;
1533 pp->rx_fis_dma = mem_dma;
1534
1535 mem += AHCI_RX_FIS_SZ;
1536 mem_dma += AHCI_RX_FIS_SZ;
1537
1538 /*
1539 * Third item: data area for storing a single command
1540 * and its scatter-gather table
1541 */
1542 pp->cmd_tbl = mem;
1543 pp->cmd_tbl_dma = mem_dma;
1544
1545 ap->private_data = pp;
1546
1547 /* power up port */
1548 ahci_power_up(ap);
1549
1550 /* initialize port */
1551 ahci_init_port(ap);
1552
1553 return 0;
1554 }
1555
1556 static void ahci_port_stop(struct ata_port *ap)
1557 {
1558 const char *emsg = NULL;
1559 int rc;
1560
1561 /* de-initialize port */
1562 rc = ahci_deinit_port(ap, &emsg);
1563 if (rc)
1564 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1565 }
1566
1567 static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
1568 {
1569 int rc;
1570
1571 if (using_dac &&
1572 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1573 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1574 if (rc) {
1575 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1576 if (rc) {
1577 dev_printk(KERN_ERR, &pdev->dev,
1578 "64-bit DMA enable failed\n");
1579 return rc;
1580 }
1581 }
1582 } else {
1583 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1584 if (rc) {
1585 dev_printk(KERN_ERR, &pdev->dev,
1586 "32-bit DMA enable failed\n");
1587 return rc;
1588 }
1589 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1590 if (rc) {
1591 dev_printk(KERN_ERR, &pdev->dev,
1592 "32-bit consistent DMA enable failed\n");
1593 return rc;
1594 }
1595 }
1596 return 0;
1597 }
1598
1599 static void ahci_print_info(struct ata_host *host)
1600 {
1601 struct ahci_host_priv *hpriv = host->private_data;
1602 struct pci_dev *pdev = to_pci_dev(host->dev);
1603 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1604 u32 vers, cap, impl, speed;
1605 const char *speed_s;
1606 u16 cc;
1607 const char *scc_s;
1608
1609 vers = readl(mmio + HOST_VERSION);
1610 cap = hpriv->cap;
1611 impl = hpriv->port_map;
1612
1613 speed = (cap >> 20) & 0xf;
1614 if (speed == 1)
1615 speed_s = "1.5";
1616 else if (speed == 2)
1617 speed_s = "3";
1618 else
1619 speed_s = "?";
1620
1621 pci_read_config_word(pdev, 0x0a, &cc);
1622 if (cc == PCI_CLASS_STORAGE_IDE)
1623 scc_s = "IDE";
1624 else if (cc == PCI_CLASS_STORAGE_SATA)
1625 scc_s = "SATA";
1626 else if (cc == PCI_CLASS_STORAGE_RAID)
1627 scc_s = "RAID";
1628 else
1629 scc_s = "unknown";
1630
1631 dev_printk(KERN_INFO, &pdev->dev,
1632 "AHCI %02x%02x.%02x%02x "
1633 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1634 ,
1635
1636 (vers >> 24) & 0xff,
1637 (vers >> 16) & 0xff,
1638 (vers >> 8) & 0xff,
1639 vers & 0xff,
1640
1641 ((cap >> 8) & 0x1f) + 1,
1642 (cap & 0x1f) + 1,
1643 speed_s,
1644 impl,
1645 scc_s);
1646
1647 dev_printk(KERN_INFO, &pdev->dev,
1648 "flags: "
1649 "%s%s%s%s%s%s"
1650 "%s%s%s%s%s%s%s\n"
1651 ,
1652
1653 cap & (1 << 31) ? "64bit " : "",
1654 cap & (1 << 30) ? "ncq " : "",
1655 cap & (1 << 28) ? "ilck " : "",
1656 cap & (1 << 27) ? "stag " : "",
1657 cap & (1 << 26) ? "pm " : "",
1658 cap & (1 << 25) ? "led " : "",
1659
1660 cap & (1 << 24) ? "clo " : "",
1661 cap & (1 << 19) ? "nz " : "",
1662 cap & (1 << 18) ? "only " : "",
1663 cap & (1 << 17) ? "pmp " : "",
1664 cap & (1 << 15) ? "pio " : "",
1665 cap & (1 << 14) ? "slum " : "",
1666 cap & (1 << 13) ? "part " : ""
1667 );
1668 }
1669
1670 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1671 {
1672 static int printed_version;
1673 struct ata_port_info pi = ahci_port_info[ent->driver_data];
1674 const struct ata_port_info *ppi[] = { &pi, NULL };
1675 struct device *dev = &pdev->dev;
1676 struct ahci_host_priv *hpriv;
1677 struct ata_host *host;
1678 int i, rc;
1679
1680 VPRINTK("ENTER\n");
1681
1682 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1683
1684 if (!printed_version++)
1685 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1686
1687 /* acquire resources */
1688 rc = pcim_enable_device(pdev);
1689 if (rc)
1690 return rc;
1691
1692 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1693 if (rc == -EBUSY)
1694 pcim_pin_device(pdev);
1695 if (rc)
1696 return rc;
1697
1698 if (pci_enable_msi(pdev))
1699 pci_intx(pdev, 1);
1700
1701 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1702 if (!hpriv)
1703 return -ENOMEM;
1704
1705 /* save initial config */
1706 ahci_save_initial_config(pdev, &pi, hpriv);
1707
1708 /* prepare host */
1709 if (!(pi.flags & AHCI_FLAG_NO_NCQ) && (hpriv->cap & HOST_CAP_NCQ))
1710 pi.flags |= ATA_FLAG_NCQ;
1711
1712 host = ata_host_alloc_pinfo(&pdev->dev, ppi, fls(hpriv->port_map));
1713 if (!host)
1714 return -ENOMEM;
1715 host->iomap = pcim_iomap_table(pdev);
1716 host->private_data = hpriv;
1717
1718 for (i = 0; i < host->n_ports; i++) {
1719 if (hpriv->port_map & (1 << i)) {
1720 struct ata_port *ap = host->ports[i];
1721 void __iomem *port_mmio = ahci_port_base(ap);
1722
1723 ap->ioaddr.cmd_addr = port_mmio;
1724 ap->ioaddr.scr_addr = port_mmio + PORT_SCR;
1725 } else
1726 host->ports[i]->ops = &ata_dummy_port_ops;
1727 }
1728
1729 /* initialize adapter */
1730 rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
1731 if (rc)
1732 return rc;
1733
1734 rc = ahci_reset_controller(host);
1735 if (rc)
1736 return rc;
1737
1738 ahci_init_controller(host);
1739 ahci_print_info(host);
1740
1741 pci_set_master(pdev);
1742 return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
1743 &ahci_sht);
1744 }
1745
1746 static int __init ahci_init(void)
1747 {
1748 return pci_register_driver(&ahci_pci_driver);
1749 }
1750
1751 static void __exit ahci_exit(void)
1752 {
1753 pci_unregister_driver(&ahci_pci_driver);
1754 }
1755
1756
1757 MODULE_AUTHOR("Jeff Garzik");
1758 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1759 MODULE_LICENSE("GPL");
1760 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1761 MODULE_VERSION(DRV_VERSION);
1762
1763 module_init(ahci_init);
1764 module_exit(ahci_exit);
Linux kernel - Deliverables
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