2 * ahci.c - AHCI SATA support
4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
8 * Copyright 2004-2005 Red Hat, Inc.
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)
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.
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.
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
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
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>
48 #define DRV_NAME "ahci"
49 #define DRV_VERSION "2.3"
55 AHCI_MAX_SG = 168, /* hardware max is 64K */
56 AHCI_DMA_BOUNDARY = 0xffffffff,
57 AHCI_USE_CLUSTERING = 1,
60 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
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 +
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),
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 */
81 board_ahci_vt8251 = 2,
82 board_ahci_ign_iferr = 3,
86 /* global controller registers */
87 HOST_CAP = 0x00, /* host capabilities */
88 HOST_CTL = 0x04, /* global host control */
89 HOST_IRQ_STAT = 0x08, /* interrupt status */
90 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
91 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
94 HOST_RESET = (1 << 0), /* reset controller; self-clear */
95 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
96 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
99 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
100 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
101 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
102 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
103 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
105 /* registers for each SATA port */
106 PORT_LST_ADDR = 0x00, /* command list DMA addr */
107 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
108 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
109 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
110 PORT_IRQ_STAT = 0x10, /* interrupt status */
111 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
112 PORT_CMD = 0x18, /* port command */
113 PORT_TFDATA = 0x20, /* taskfile data */
114 PORT_SIG = 0x24, /* device TF signature */
115 PORT_CMD_ISSUE = 0x38, /* command issue */
116 PORT_SCR = 0x28, /* SATA phy register block */
117 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
118 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
119 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
120 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
122 /* PORT_IRQ_{STAT,MASK} bits */
123 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
124 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
125 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
126 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
127 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
128 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
129 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
130 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
132 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
133 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
134 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
135 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
136 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
137 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
138 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
139 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
140 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
142 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
147 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
149 PORT_IRQ_HBUS_DATA_ERR,
150 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
151 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
152 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
155 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
156 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
157 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
158 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
159 PORT_CMD_CLO = (1 << 3), /* Command list override */
160 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
161 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
162 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
164 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
165 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
166 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
167 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
170 AHCI_FLAG_NO_NCQ = (1 << 24),
171 AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */
172 AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */
173 AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */
174 AHCI_FLAG_32BIT_ONLY = (1 << 28), /* force 32bit */
175 AHCI_FLAG_MV_PATA = (1 << 29), /* PATA port */
176 AHCI_FLAG_NO_MSI = (1 << 30), /* no PCI MSI */
178 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
179 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
180 ATA_FLAG_SKIP_D2H_BSY |
184 struct ahci_cmd_hdr {
199 struct ahci_host_priv {
200 u32 cap; /* cap to use */
201 u32 port_map; /* port map to use */
202 u32 saved_cap; /* saved initial cap */
203 u32 saved_port_map; /* saved initial port_map */
206 struct ahci_port_priv {
207 struct ahci_cmd_hdr *cmd_slot;
208 dma_addr_t cmd_slot_dma;
210 dma_addr_t cmd_tbl_dma;
212 dma_addr_t rx_fis_dma;
213 /* for NCQ spurious interrupt analysis */
214 unsigned int ncq_saw_d2h:1;
215 unsigned int ncq_saw_dmas:1;
216 unsigned int ncq_saw_sdb:1;
219 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
220 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
221 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
222 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
223 static void ahci_irq_clear(struct ata_port *ap);
224 static int ahci_port_start(struct ata_port *ap);
225 static void ahci_port_stop(struct ata_port *ap);
226 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
227 static void ahci_qc_prep(struct ata_queued_cmd *qc);
228 static u8 ahci_check_status(struct ata_port *ap);
229 static void ahci_freeze(struct ata_port *ap);
230 static void ahci_thaw(struct ata_port *ap);
231 static void ahci_error_handler(struct ata_port *ap);
232 static void ahci_vt8251_error_handler(struct ata_port *ap);
233 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
234 static int ahci_port_resume(struct ata_port *ap);
235 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl);
236 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
239 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
240 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
241 static int ahci_pci_device_resume(struct pci_dev *pdev);
244 static struct scsi_host_template ahci_sht = {
245 .module = THIS_MODULE,
247 .ioctl = ata_scsi_ioctl,
248 .queuecommand = ata_scsi_queuecmd,
249 .change_queue_depth = ata_scsi_change_queue_depth,
250 .can_queue = AHCI_MAX_CMDS - 1,
251 .this_id = ATA_SHT_THIS_ID,
252 .sg_tablesize = AHCI_MAX_SG,
253 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
254 .emulated = ATA_SHT_EMULATED,
255 .use_clustering = AHCI_USE_CLUSTERING,
256 .proc_name = DRV_NAME,
257 .dma_boundary = AHCI_DMA_BOUNDARY,
258 .slave_configure = ata_scsi_slave_config,
259 .slave_destroy = ata_scsi_slave_destroy,
260 .bios_param = ata_std_bios_param,
263 static const struct ata_port_operations ahci_ops = {
264 .port_disable = ata_port_disable,
266 .check_status = ahci_check_status,
267 .check_altstatus = ahci_check_status,
268 .dev_select = ata_noop_dev_select,
270 .tf_read = ahci_tf_read,
272 .qc_prep = ahci_qc_prep,
273 .qc_issue = ahci_qc_issue,
275 .irq_clear = ahci_irq_clear,
276 .irq_on = ata_dummy_irq_on,
277 .irq_ack = ata_dummy_irq_ack,
279 .scr_read = ahci_scr_read,
280 .scr_write = ahci_scr_write,
282 .freeze = ahci_freeze,
285 .error_handler = ahci_error_handler,
286 .post_internal_cmd = ahci_post_internal_cmd,
289 .port_suspend = ahci_port_suspend,
290 .port_resume = ahci_port_resume,
293 .port_start = ahci_port_start,
294 .port_stop = ahci_port_stop,
297 static const struct ata_port_operations ahci_vt8251_ops = {
298 .port_disable = ata_port_disable,
300 .check_status = ahci_check_status,
301 .check_altstatus = ahci_check_status,
302 .dev_select = ata_noop_dev_select,
304 .tf_read = ahci_tf_read,
306 .qc_prep = ahci_qc_prep,
307 .qc_issue = ahci_qc_issue,
309 .irq_clear = ahci_irq_clear,
310 .irq_on = ata_dummy_irq_on,
311 .irq_ack = ata_dummy_irq_ack,
313 .scr_read = ahci_scr_read,
314 .scr_write = ahci_scr_write,
316 .freeze = ahci_freeze,
319 .error_handler = ahci_vt8251_error_handler,
320 .post_internal_cmd = ahci_post_internal_cmd,
323 .port_suspend = ahci_port_suspend,
324 .port_resume = ahci_port_resume,
327 .port_start = ahci_port_start,
328 .port_stop = ahci_port_stop,
331 static const struct ata_port_info ahci_port_info[] = {
334 .flags = AHCI_FLAG_COMMON,
335 .pio_mask = 0x1f, /* pio0-4 */
336 .udma_mask = ATA_UDMA6,
337 .port_ops = &ahci_ops,
341 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_HONOR_PI,
342 .pio_mask = 0x1f, /* pio0-4 */
343 .udma_mask = ATA_UDMA6,
344 .port_ops = &ahci_ops,
346 /* board_ahci_vt8251 */
348 .flags = AHCI_FLAG_COMMON | ATA_FLAG_HRST_TO_RESUME |
350 .pio_mask = 0x1f, /* pio0-4 */
351 .udma_mask = ATA_UDMA6,
352 .port_ops = &ahci_vt8251_ops,
354 /* board_ahci_ign_iferr */
356 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_IGN_IRQ_IF_ERR,
357 .pio_mask = 0x1f, /* pio0-4 */
358 .udma_mask = ATA_UDMA6,
359 .port_ops = &ahci_ops,
361 /* board_ahci_sb600 */
363 .flags = AHCI_FLAG_COMMON |
364 AHCI_FLAG_IGN_SERR_INTERNAL |
365 AHCI_FLAG_32BIT_ONLY,
366 .pio_mask = 0x1f, /* pio0-4 */
367 .udma_mask = ATA_UDMA6,
368 .port_ops = &ahci_ops,
373 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
374 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
375 ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_HONOR_PI |
376 AHCI_FLAG_NO_NCQ | AHCI_FLAG_NO_MSI |
378 .pio_mask = 0x1f, /* pio0-4 */
379 .udma_mask = ATA_UDMA6,
380 .port_ops = &ahci_ops,
384 static const struct pci_device_id ahci_pci_tbl[] = {
386 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
387 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
388 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
389 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
390 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
391 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
392 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
393 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
394 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
395 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
396 { PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */
397 { PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */
398 { PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */
399 { PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */
400 { PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */
401 { PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */
402 { PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */
403 { PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */
404 { PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */
405 { PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */
406 { PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */
407 { PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */
408 { PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */
409 { PCI_VDEVICE(INTEL, 0x292c), board_ahci_pi }, /* ICH9M */
410 { PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */
411 { PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */
412 { PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */
414 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
415 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
416 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
419 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
420 { PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700 */
423 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
424 { PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */
427 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
428 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
429 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
430 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
431 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
432 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
433 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
434 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
435 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
436 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
437 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
438 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
439 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
440 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
441 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
442 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
443 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
444 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
445 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
446 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
447 { PCI_VDEVICE(NVIDIA, 0x07f0), board_ahci }, /* MCP73 */
448 { PCI_VDEVICE(NVIDIA, 0x07f1), board_ahci }, /* MCP73 */
449 { PCI_VDEVICE(NVIDIA, 0x07f2), board_ahci }, /* MCP73 */
450 { PCI_VDEVICE(NVIDIA, 0x07f3), board_ahci }, /* MCP73 */
451 { PCI_VDEVICE(NVIDIA, 0x07f4), board_ahci }, /* MCP73 */
452 { PCI_VDEVICE(NVIDIA, 0x07f5), board_ahci }, /* MCP73 */
453 { PCI_VDEVICE(NVIDIA, 0x07f6), board_ahci }, /* MCP73 */
454 { PCI_VDEVICE(NVIDIA, 0x07f7), board_ahci }, /* MCP73 */
455 { PCI_VDEVICE(NVIDIA, 0x07f8), board_ahci }, /* MCP73 */
456 { PCI_VDEVICE(NVIDIA, 0x07f9), board_ahci }, /* MCP73 */
457 { PCI_VDEVICE(NVIDIA, 0x07fa), board_ahci }, /* MCP73 */
458 { PCI_VDEVICE(NVIDIA, 0x07fb), board_ahci }, /* MCP73 */
459 { PCI_VDEVICE(NVIDIA, 0x0ad0), board_ahci }, /* MCP77 */
460 { PCI_VDEVICE(NVIDIA, 0x0ad1), board_ahci }, /* MCP77 */
461 { PCI_VDEVICE(NVIDIA, 0x0ad2), board_ahci }, /* MCP77 */
462 { PCI_VDEVICE(NVIDIA, 0x0ad3), board_ahci }, /* MCP77 */
463 { PCI_VDEVICE(NVIDIA, 0x0ad4), board_ahci }, /* MCP77 */
464 { PCI_VDEVICE(NVIDIA, 0x0ad5), board_ahci }, /* MCP77 */
465 { PCI_VDEVICE(NVIDIA, 0x0ad6), board_ahci }, /* MCP77 */
466 { PCI_VDEVICE(NVIDIA, 0x0ad7), board_ahci }, /* MCP77 */
467 { PCI_VDEVICE(NVIDIA, 0x0ad8), board_ahci }, /* MCP77 */
468 { PCI_VDEVICE(NVIDIA, 0x0ad9), board_ahci }, /* MCP77 */
469 { PCI_VDEVICE(NVIDIA, 0x0ada), board_ahci }, /* MCP77 */
470 { PCI_VDEVICE(NVIDIA, 0x0adb), board_ahci }, /* MCP77 */
473 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
474 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
475 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
478 { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
480 /* Generic, PCI class code for AHCI */
481 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
482 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
484 { } /* terminate list */
488 static struct pci_driver ahci_pci_driver = {
490 .id_table = ahci_pci_tbl,
491 .probe = ahci_init_one,
492 .remove = ata_pci_remove_one,
494 .suspend = ahci_pci_device_suspend,
495 .resume = ahci_pci_device_resume,
500 static inline int ahci_nr_ports(u32 cap)
502 return (cap & 0x1f) + 1;
505 static inline void __iomem *__ahci_port_base(struct ata_host *host,
506 unsigned int port_no)
508 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
510 return mmio + 0x100 + (port_no * 0x80);
513 static inline void __iomem *ahci_port_base(struct ata_port *ap)
515 return __ahci_port_base(ap->host, ap->port_no);
519 * ahci_save_initial_config - Save and fixup initial config values
520 * @pdev: target PCI device
521 * @pi: associated ATA port info
522 * @hpriv: host private area to store config values
524 * Some registers containing configuration info might be setup by
525 * BIOS and might be cleared on reset. This function saves the
526 * initial values of those registers into @hpriv such that they
527 * can be restored after controller reset.
529 * If inconsistent, config values are fixed up by this function.
534 static void ahci_save_initial_config(struct pci_dev *pdev,
535 const struct ata_port_info *pi,
536 struct ahci_host_priv *hpriv)
538 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
542 /* Values prefixed with saved_ are written back to host after
543 * reset. Values without are used for driver operation.
545 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
546 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
548 /* some chips have errata preventing 64bit use */
549 if ((cap & HOST_CAP_64) && (pi->flags & AHCI_FLAG_32BIT_ONLY)) {
550 dev_printk(KERN_INFO, &pdev->dev,
551 "controller can't do 64bit DMA, forcing 32bit\n");
555 if ((cap & HOST_CAP_NCQ) && (pi->flags & AHCI_FLAG_NO_NCQ)) {
556 dev_printk(KERN_INFO, &pdev->dev,
557 "controller can't do NCQ, turning off CAP_NCQ\n");
558 cap &= ~HOST_CAP_NCQ;
561 /* fixup zero port_map */
563 port_map = (1 << ahci_nr_ports(cap)) - 1;
564 dev_printk(KERN_WARNING, &pdev->dev,
565 "PORTS_IMPL is zero, forcing 0x%x\n", port_map);
567 /* write the fixed up value to the PI register */
568 hpriv->saved_port_map = port_map;
572 * Temporary Marvell 6145 hack: PATA port presence
573 * is asserted through the standard AHCI port
574 * presence register, as bit 4 (counting from 0)
576 if (pi->flags & AHCI_FLAG_MV_PATA) {
577 dev_printk(KERN_ERR, &pdev->dev,
578 "MV_AHCI HACK: port_map %x -> %x\n",
580 hpriv->port_map & 0xf);
585 /* cross check port_map and cap.n_ports */
586 if (pi->flags & AHCI_FLAG_HONOR_PI) {
587 u32 tmp_port_map = port_map;
588 int n_ports = ahci_nr_ports(cap);
590 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
591 if (tmp_port_map & (1 << i)) {
593 tmp_port_map &= ~(1 << i);
597 /* Whine if inconsistent. No need to update cap.
598 * port_map is used to determine number of ports.
600 if (n_ports || tmp_port_map)
601 dev_printk(KERN_WARNING, &pdev->dev,
602 "nr_ports (%u) and implemented port map "
603 "(0x%x) don't match\n",
604 ahci_nr_ports(cap), port_map);
606 /* fabricate port_map from cap.nr_ports */
607 port_map = (1 << ahci_nr_ports(cap)) - 1;
610 /* record values to use during operation */
612 hpriv->port_map = port_map;
616 * ahci_restore_initial_config - Restore initial config
617 * @host: target ATA host
619 * Restore initial config stored by ahci_save_initial_config().
624 static void ahci_restore_initial_config(struct ata_host *host)
626 struct ahci_host_priv *hpriv = host->private_data;
627 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
629 writel(hpriv->saved_cap, mmio + HOST_CAP);
630 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
631 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
634 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg_in, u32 *val)
639 case SCR_STATUS: sc_reg = 0; break;
640 case SCR_CONTROL: sc_reg = 1; break;
641 case SCR_ERROR: sc_reg = 2; break;
642 case SCR_ACTIVE: sc_reg = 3; break;
647 *val = readl(ap->ioaddr.scr_addr + (sc_reg * 4));
652 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg_in, u32 val)
657 case SCR_STATUS: sc_reg = 0; break;
658 case SCR_CONTROL: sc_reg = 1; break;
659 case SCR_ERROR: sc_reg = 2; break;
660 case SCR_ACTIVE: sc_reg = 3; break;
665 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
669 static void ahci_start_engine(struct ata_port *ap)
671 void __iomem *port_mmio = ahci_port_base(ap);
675 tmp = readl(port_mmio + PORT_CMD);
676 tmp |= PORT_CMD_START;
677 writel(tmp, port_mmio + PORT_CMD);
678 readl(port_mmio + PORT_CMD); /* flush */
681 static int ahci_stop_engine(struct ata_port *ap)
683 void __iomem *port_mmio = ahci_port_base(ap);
686 tmp = readl(port_mmio + PORT_CMD);
688 /* check if the HBA is idle */
689 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
692 /* setting HBA to idle */
693 tmp &= ~PORT_CMD_START;
694 writel(tmp, port_mmio + PORT_CMD);
696 /* wait for engine to stop. This could be as long as 500 msec */
697 tmp = ata_wait_register(port_mmio + PORT_CMD,
698 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
699 if (tmp & PORT_CMD_LIST_ON)
705 static void ahci_start_fis_rx(struct ata_port *ap)
707 void __iomem *port_mmio = ahci_port_base(ap);
708 struct ahci_host_priv *hpriv = ap->host->private_data;
709 struct ahci_port_priv *pp = ap->private_data;
712 /* set FIS registers */
713 if (hpriv->cap & HOST_CAP_64)
714 writel((pp->cmd_slot_dma >> 16) >> 16,
715 port_mmio + PORT_LST_ADDR_HI);
716 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
718 if (hpriv->cap & HOST_CAP_64)
719 writel((pp->rx_fis_dma >> 16) >> 16,
720 port_mmio + PORT_FIS_ADDR_HI);
721 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
723 /* enable FIS reception */
724 tmp = readl(port_mmio + PORT_CMD);
725 tmp |= PORT_CMD_FIS_RX;
726 writel(tmp, port_mmio + PORT_CMD);
729 readl(port_mmio + PORT_CMD);
732 static int ahci_stop_fis_rx(struct ata_port *ap)
734 void __iomem *port_mmio = ahci_port_base(ap);
737 /* disable FIS reception */
738 tmp = readl(port_mmio + PORT_CMD);
739 tmp &= ~PORT_CMD_FIS_RX;
740 writel(tmp, port_mmio + PORT_CMD);
742 /* wait for completion, spec says 500ms, give it 1000 */
743 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
744 PORT_CMD_FIS_ON, 10, 1000);
745 if (tmp & PORT_CMD_FIS_ON)
751 static void ahci_power_up(struct ata_port *ap)
753 struct ahci_host_priv *hpriv = ap->host->private_data;
754 void __iomem *port_mmio = ahci_port_base(ap);
757 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
760 if (hpriv->cap & HOST_CAP_SSS) {
761 cmd |= PORT_CMD_SPIN_UP;
762 writel(cmd, port_mmio + PORT_CMD);
766 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
770 static void ahci_power_down(struct ata_port *ap)
772 struct ahci_host_priv *hpriv = ap->host->private_data;
773 void __iomem *port_mmio = ahci_port_base(ap);
776 if (!(hpriv->cap & HOST_CAP_SSS))
779 /* put device into listen mode, first set PxSCTL.DET to 0 */
780 scontrol = readl(port_mmio + PORT_SCR_CTL);
782 writel(scontrol, port_mmio + PORT_SCR_CTL);
784 /* then set PxCMD.SUD to 0 */
785 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
786 cmd &= ~PORT_CMD_SPIN_UP;
787 writel(cmd, port_mmio + PORT_CMD);
791 static void ahci_start_port(struct ata_port *ap)
793 /* enable FIS reception */
794 ahci_start_fis_rx(ap);
797 ahci_start_engine(ap);
800 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
805 rc = ahci_stop_engine(ap);
807 *emsg = "failed to stop engine";
811 /* disable FIS reception */
812 rc = ahci_stop_fis_rx(ap);
814 *emsg = "failed stop FIS RX";
821 static int ahci_reset_controller(struct ata_host *host)
823 struct pci_dev *pdev = to_pci_dev(host->dev);
824 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
827 /* global controller reset */
828 tmp = readl(mmio + HOST_CTL);
829 if ((tmp & HOST_RESET) == 0) {
830 writel(tmp | HOST_RESET, mmio + HOST_CTL);
831 readl(mmio + HOST_CTL); /* flush */
834 /* reset must complete within 1 second, or
835 * the hardware should be considered fried.
839 tmp = readl(mmio + HOST_CTL);
840 if (tmp & HOST_RESET) {
841 dev_printk(KERN_ERR, host->dev,
842 "controller reset failed (0x%x)\n", tmp);
846 /* turn on AHCI mode */
847 writel(HOST_AHCI_EN, mmio + HOST_CTL);
848 (void) readl(mmio + HOST_CTL); /* flush */
850 /* some registers might be cleared on reset. restore initial values */
851 ahci_restore_initial_config(host);
853 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
857 pci_read_config_word(pdev, 0x92, &tmp16);
859 pci_write_config_word(pdev, 0x92, tmp16);
865 static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
866 int port_no, void __iomem *mmio,
867 void __iomem *port_mmio)
869 const char *emsg = NULL;
873 /* make sure port is not active */
874 rc = ahci_deinit_port(ap, &emsg);
876 dev_printk(KERN_WARNING, &pdev->dev,
877 "%s (%d)\n", emsg, rc);
880 tmp = readl(port_mmio + PORT_SCR_ERR);
881 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
882 writel(tmp, port_mmio + PORT_SCR_ERR);
885 tmp = readl(port_mmio + PORT_IRQ_STAT);
886 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
888 writel(tmp, port_mmio + PORT_IRQ_STAT);
890 writel(1 << port_no, mmio + HOST_IRQ_STAT);
893 static void ahci_init_controller(struct ata_host *host)
895 struct pci_dev *pdev = to_pci_dev(host->dev);
896 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
898 void __iomem *port_mmio;
901 if (host->ports[0]->flags & AHCI_FLAG_MV_PATA) {
902 port_mmio = __ahci_port_base(host, 4);
904 writel(0, port_mmio + PORT_IRQ_MASK);
907 tmp = readl(port_mmio + PORT_IRQ_STAT);
908 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
910 writel(tmp, port_mmio + PORT_IRQ_STAT);
913 for (i = 0; i < host->n_ports; i++) {
914 struct ata_port *ap = host->ports[i];
916 port_mmio = ahci_port_base(ap);
917 if (ata_port_is_dummy(ap))
920 ahci_port_init(pdev, ap, i, mmio, port_mmio);
923 tmp = readl(mmio + HOST_CTL);
924 VPRINTK("HOST_CTL 0x%x\n", tmp);
925 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
926 tmp = readl(mmio + HOST_CTL);
927 VPRINTK("HOST_CTL 0x%x\n", tmp);
930 static unsigned int ahci_dev_classify(struct ata_port *ap)
932 void __iomem *port_mmio = ahci_port_base(ap);
933 struct ata_taskfile tf;
936 tmp = readl(port_mmio + PORT_SIG);
937 tf.lbah = (tmp >> 24) & 0xff;
938 tf.lbam = (tmp >> 16) & 0xff;
939 tf.lbal = (tmp >> 8) & 0xff;
940 tf.nsect = (tmp) & 0xff;
942 return ata_dev_classify(&tf);
945 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
948 dma_addr_t cmd_tbl_dma;
950 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
952 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
953 pp->cmd_slot[tag].status = 0;
954 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
955 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
958 static int ahci_kick_engine(struct ata_port *ap, int force_restart)
960 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
961 struct ahci_host_priv *hpriv = ap->host->private_data;
965 /* do we need to kick the port? */
966 busy = ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ);
967 if (!busy && !force_restart)
971 rc = ahci_stop_engine(ap);
975 /* need to do CLO? */
981 if (!(hpriv->cap & HOST_CAP_CLO)) {
987 tmp = readl(port_mmio + PORT_CMD);
989 writel(tmp, port_mmio + PORT_CMD);
992 tmp = ata_wait_register(port_mmio + PORT_CMD,
993 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
994 if (tmp & PORT_CMD_CLO)
999 ahci_start_engine(ap);
1003 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1004 struct ata_taskfile *tf, int is_cmd, u16 flags,
1005 unsigned long timeout_msec)
1007 const u32 cmd_fis_len = 5; /* five dwords */
1008 struct ahci_port_priv *pp = ap->private_data;
1009 void __iomem *port_mmio = ahci_port_base(ap);
1010 u8 *fis = pp->cmd_tbl;
1013 /* prep the command */
1014 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1015 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1018 writel(1, port_mmio + PORT_CMD_ISSUE);
1021 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
1024 ahci_kick_engine(ap, 1);
1028 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1033 static int ahci_do_softreset(struct ata_port *ap, unsigned int *class,
1034 int pmp, unsigned long deadline)
1036 const char *reason = NULL;
1037 unsigned long now, msecs;
1038 struct ata_taskfile tf;
1043 if (ata_port_offline(ap)) {
1044 DPRINTK("PHY reports no device\n");
1045 *class = ATA_DEV_NONE;
1049 /* prepare for SRST (AHCI-1.1 10.4.1) */
1050 rc = ahci_kick_engine(ap, 1);
1052 ata_port_printk(ap, KERN_WARNING,
1053 "failed to reset engine (errno=%d)", rc);
1055 ata_tf_init(ap->device, &tf);
1057 /* issue the first D2H Register FIS */
1060 if (time_after(now, deadline))
1061 msecs = jiffies_to_msecs(deadline - now);
1064 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1065 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1067 reason = "1st FIS failed";
1071 /* spec says at least 5us, but be generous and sleep for 1ms */
1074 /* issue the second D2H Register FIS */
1075 tf.ctl &= ~ATA_SRST;
1076 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1078 /* spec mandates ">= 2ms" before checking status.
1079 * We wait 150ms, because that was the magic delay used for
1080 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
1081 * between when the ATA command register is written, and then
1082 * status is checked. Because waiting for "a while" before
1083 * checking status is fine, post SRST, we perform this magic
1084 * delay here as well.
1088 rc = ata_wait_ready(ap, deadline);
1089 /* link occupied, -ENODEV too is an error */
1091 reason = "device not ready";
1094 *class = ahci_dev_classify(ap);
1096 DPRINTK("EXIT, class=%u\n", *class);
1100 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
1104 static int ahci_softreset(struct ata_port *ap, unsigned int *class,
1105 unsigned long deadline)
1107 return ahci_do_softreset(ap, class, 0, deadline);
1110 static int ahci_hardreset(struct ata_port *ap, unsigned int *class,
1111 unsigned long deadline)
1113 struct ahci_port_priv *pp = ap->private_data;
1114 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1115 struct ata_taskfile tf;
1120 ahci_stop_engine(ap);
1122 /* clear D2H reception area to properly wait for D2H FIS */
1123 ata_tf_init(ap->device, &tf);
1125 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1127 rc = sata_std_hardreset(ap, class, deadline);
1129 ahci_start_engine(ap);
1131 if (rc == 0 && ata_port_online(ap))
1132 *class = ahci_dev_classify(ap);
1133 if (*class == ATA_DEV_UNKNOWN)
1134 *class = ATA_DEV_NONE;
1136 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1140 static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class,
1141 unsigned long deadline)
1148 ahci_stop_engine(ap);
1150 rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context),
1153 /* vt8251 needs SError cleared for the port to operate */
1154 ahci_scr_read(ap, SCR_ERROR, &serror);
1155 ahci_scr_write(ap, SCR_ERROR, serror);
1157 ahci_start_engine(ap);
1159 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1161 /* vt8251 doesn't clear BSY on signature FIS reception,
1162 * request follow-up softreset.
1164 return rc ?: -EAGAIN;
1167 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
1169 void __iomem *port_mmio = ahci_port_base(ap);
1172 ata_std_postreset(ap, class);
1174 /* Make sure port's ATAPI bit is set appropriately */
1175 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1176 if (*class == ATA_DEV_ATAPI)
1177 new_tmp |= PORT_CMD_ATAPI;
1179 new_tmp &= ~PORT_CMD_ATAPI;
1180 if (new_tmp != tmp) {
1181 writel(new_tmp, port_mmio + PORT_CMD);
1182 readl(port_mmio + PORT_CMD); /* flush */
1186 static u8 ahci_check_status(struct ata_port *ap)
1188 void __iomem *mmio = ap->ioaddr.cmd_addr;
1190 return readl(mmio + PORT_TFDATA) & 0xFF;
1193 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
1195 struct ahci_port_priv *pp = ap->private_data;
1196 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1198 ata_tf_from_fis(d2h_fis, tf);
1201 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1203 struct scatterlist *sg;
1204 struct ahci_sg *ahci_sg;
1205 unsigned int n_sg = 0;
1210 * Next, the S/G list.
1212 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1213 ata_for_each_sg(sg, qc) {
1214 dma_addr_t addr = sg_dma_address(sg);
1215 u32 sg_len = sg_dma_len(sg);
1217 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1218 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1219 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
1228 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1230 struct ata_port *ap = qc->ap;
1231 struct ahci_port_priv *pp = ap->private_data;
1232 int is_atapi = is_atapi_taskfile(&qc->tf);
1235 const u32 cmd_fis_len = 5; /* five dwords */
1236 unsigned int n_elem;
1239 * Fill in command table information. First, the header,
1240 * a SATA Register - Host to Device command FIS.
1242 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1244 ata_tf_to_fis(&qc->tf, 0, 1, cmd_tbl);
1246 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1247 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1251 if (qc->flags & ATA_QCFLAG_DMAMAP)
1252 n_elem = ahci_fill_sg(qc, cmd_tbl);
1255 * Fill in command slot information.
1257 opts = cmd_fis_len | n_elem << 16;
1258 if (qc->tf.flags & ATA_TFLAG_WRITE)
1259 opts |= AHCI_CMD_WRITE;
1261 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1263 ahci_fill_cmd_slot(pp, qc->tag, opts);
1266 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1268 struct ahci_port_priv *pp = ap->private_data;
1269 struct ata_eh_info *ehi = &ap->eh_info;
1270 unsigned int err_mask = 0, action = 0;
1271 struct ata_queued_cmd *qc;
1274 ata_ehi_clear_desc(ehi);
1276 /* AHCI needs SError cleared; otherwise, it might lock up */
1277 ahci_scr_read(ap, SCR_ERROR, &serror);
1278 ahci_scr_write(ap, SCR_ERROR, serror);
1280 /* analyze @irq_stat */
1281 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1283 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1284 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1285 irq_stat &= ~PORT_IRQ_IF_ERR;
1287 if (irq_stat & PORT_IRQ_TF_ERR) {
1288 err_mask |= AC_ERR_DEV;
1289 if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
1290 serror &= ~SERR_INTERNAL;
1293 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1294 err_mask |= AC_ERR_HOST_BUS;
1295 action |= ATA_EH_SOFTRESET;
1298 if (irq_stat & PORT_IRQ_IF_ERR) {
1299 err_mask |= AC_ERR_ATA_BUS;
1300 action |= ATA_EH_SOFTRESET;
1301 ata_ehi_push_desc(ehi, "interface fatal error");
1304 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1305 ata_ehi_hotplugged(ehi);
1306 ata_ehi_push_desc(ehi, "%s", irq_stat & PORT_IRQ_CONNECT ?
1307 "connection status changed" : "PHY RDY changed");
1310 if (irq_stat & PORT_IRQ_UNK_FIS) {
1311 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1313 err_mask |= AC_ERR_HSM;
1314 action |= ATA_EH_SOFTRESET;
1315 ata_ehi_push_desc(ehi, "unknown FIS %08x %08x %08x %08x",
1316 unk[0], unk[1], unk[2], unk[3]);
1319 /* okay, let's hand over to EH */
1320 ehi->serror |= serror;
1321 ehi->action |= action;
1323 qc = ata_qc_from_tag(ap, ap->active_tag);
1325 qc->err_mask |= err_mask;
1327 ehi->err_mask |= err_mask;
1329 if (irq_stat & PORT_IRQ_FREEZE)
1330 ata_port_freeze(ap);
1335 static void ahci_port_intr(struct ata_port *ap)
1337 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1338 struct ata_eh_info *ehi = &ap->eh_info;
1339 struct ahci_port_priv *pp = ap->private_data;
1340 u32 status, qc_active;
1341 int rc, known_irq = 0;
1343 status = readl(port_mmio + PORT_IRQ_STAT);
1344 writel(status, port_mmio + PORT_IRQ_STAT);
1346 if (unlikely(status & PORT_IRQ_ERROR)) {
1347 ahci_error_intr(ap, status);
1352 qc_active = readl(port_mmio + PORT_SCR_ACT);
1354 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1356 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1360 ehi->err_mask |= AC_ERR_HSM;
1361 ehi->action |= ATA_EH_SOFTRESET;
1362 ata_port_freeze(ap);
1366 /* hmmm... a spurious interupt */
1368 /* if !NCQ, ignore. No modern ATA device has broken HSM
1369 * implementation for non-NCQ commands.
1374 if (status & PORT_IRQ_D2H_REG_FIS) {
1375 if (!pp->ncq_saw_d2h)
1376 ata_port_printk(ap, KERN_INFO,
1377 "D2H reg with I during NCQ, "
1378 "this message won't be printed again\n");
1379 pp->ncq_saw_d2h = 1;
1383 if (status & PORT_IRQ_DMAS_FIS) {
1384 if (!pp->ncq_saw_dmas)
1385 ata_port_printk(ap, KERN_INFO,
1386 "DMAS FIS during NCQ, "
1387 "this message won't be printed again\n");
1388 pp->ncq_saw_dmas = 1;
1392 if (status & PORT_IRQ_SDB_FIS) {
1393 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1395 if (le32_to_cpu(f[1])) {
1396 /* SDB FIS containing spurious completions
1397 * might be dangerous, whine and fail commands
1398 * with HSM violation. EH will turn off NCQ
1399 * after several such failures.
1401 ata_ehi_push_desc(ehi,
1402 "spurious completions during NCQ "
1403 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1404 readl(port_mmio + PORT_CMD_ISSUE),
1405 readl(port_mmio + PORT_SCR_ACT),
1406 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1407 ehi->err_mask |= AC_ERR_HSM;
1408 ehi->action |= ATA_EH_SOFTRESET;
1409 ata_port_freeze(ap);
1411 if (!pp->ncq_saw_sdb)
1412 ata_port_printk(ap, KERN_INFO,
1413 "spurious SDB FIS %08x:%08x during NCQ, "
1414 "this message won't be printed again\n",
1415 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1416 pp->ncq_saw_sdb = 1;
1422 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1423 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1424 status, ap->active_tag, ap->sactive);
1427 static void ahci_irq_clear(struct ata_port *ap)
1432 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1434 struct ata_host *host = dev_instance;
1435 struct ahci_host_priv *hpriv;
1436 unsigned int i, handled = 0;
1438 u32 irq_stat, irq_ack = 0;
1442 hpriv = host->private_data;
1443 mmio = host->iomap[AHCI_PCI_BAR];
1445 /* sigh. 0xffffffff is a valid return from h/w */
1446 irq_stat = readl(mmio + HOST_IRQ_STAT);
1447 irq_stat &= hpriv->port_map;
1451 spin_lock(&host->lock);
1453 for (i = 0; i < host->n_ports; i++) {
1454 struct ata_port *ap;
1456 if (!(irq_stat & (1 << i)))
1459 ap = host->ports[i];
1462 VPRINTK("port %u\n", i);
1464 VPRINTK("port %u (no irq)\n", i);
1465 if (ata_ratelimit())
1466 dev_printk(KERN_WARNING, host->dev,
1467 "interrupt on disabled port %u\n", i);
1470 irq_ack |= (1 << i);
1474 writel(irq_ack, mmio + HOST_IRQ_STAT);
1478 spin_unlock(&host->lock);
1482 return IRQ_RETVAL(handled);
1485 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1487 struct ata_port *ap = qc->ap;
1488 void __iomem *port_mmio = ahci_port_base(ap);
1490 if (qc->tf.protocol == ATA_PROT_NCQ)
1491 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1492 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1493 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1498 static void ahci_freeze(struct ata_port *ap)
1500 void __iomem *port_mmio = ahci_port_base(ap);
1503 writel(0, port_mmio + PORT_IRQ_MASK);
1506 static void ahci_thaw(struct ata_port *ap)
1508 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1509 void __iomem *port_mmio = ahci_port_base(ap);
1513 tmp = readl(port_mmio + PORT_IRQ_STAT);
1514 writel(tmp, port_mmio + PORT_IRQ_STAT);
1515 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1517 /* turn IRQ back on */
1518 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1521 static void ahci_error_handler(struct ata_port *ap)
1523 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1524 /* restart engine */
1525 ahci_stop_engine(ap);
1526 ahci_start_engine(ap);
1529 /* perform recovery */
1530 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
1534 static void ahci_vt8251_error_handler(struct ata_port *ap)
1536 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1537 /* restart engine */
1538 ahci_stop_engine(ap);
1539 ahci_start_engine(ap);
1542 /* perform recovery */
1543 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1547 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1549 struct ata_port *ap = qc->ap;
1551 /* make DMA engine forget about the failed command */
1552 if (qc->flags & ATA_QCFLAG_FAILED)
1553 ahci_kick_engine(ap, 1);
1556 static int ahci_port_resume(struct ata_port *ap)
1559 ahci_start_port(ap);
1565 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1567 const char *emsg = NULL;
1570 rc = ahci_deinit_port(ap, &emsg);
1572 ahci_power_down(ap);
1574 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1575 ahci_start_port(ap);
1581 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1583 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1584 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1587 if (mesg.event == PM_EVENT_SUSPEND) {
1588 /* AHCI spec rev1.1 section 8.3.3:
1589 * Software must disable interrupts prior to requesting a
1590 * transition of the HBA to D3 state.
1592 ctl = readl(mmio + HOST_CTL);
1593 ctl &= ~HOST_IRQ_EN;
1594 writel(ctl, mmio + HOST_CTL);
1595 readl(mmio + HOST_CTL); /* flush */
1598 return ata_pci_device_suspend(pdev, mesg);
1601 static int ahci_pci_device_resume(struct pci_dev *pdev)
1603 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1606 rc = ata_pci_device_do_resume(pdev);
1610 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1611 rc = ahci_reset_controller(host);
1615 ahci_init_controller(host);
1618 ata_host_resume(host);
1624 static int ahci_port_start(struct ata_port *ap)
1626 struct device *dev = ap->host->dev;
1627 struct ahci_port_priv *pp;
1632 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1636 rc = ata_pad_alloc(ap, dev);
1640 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1644 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1647 * First item in chunk of DMA memory: 32-slot command table,
1648 * 32 bytes each in size
1651 pp->cmd_slot_dma = mem_dma;
1653 mem += AHCI_CMD_SLOT_SZ;
1654 mem_dma += AHCI_CMD_SLOT_SZ;
1657 * Second item: Received-FIS area
1660 pp->rx_fis_dma = mem_dma;
1662 mem += AHCI_RX_FIS_SZ;
1663 mem_dma += AHCI_RX_FIS_SZ;
1666 * Third item: data area for storing a single command
1667 * and its scatter-gather table
1670 pp->cmd_tbl_dma = mem_dma;
1672 ap->private_data = pp;
1674 /* engage engines, captain */
1675 return ahci_port_resume(ap);
1678 static void ahci_port_stop(struct ata_port *ap)
1680 const char *emsg = NULL;
1683 /* de-initialize port */
1684 rc = ahci_deinit_port(ap, &emsg);
1686 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1689 static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
1694 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1695 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1697 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1699 dev_printk(KERN_ERR, &pdev->dev,
1700 "64-bit DMA enable failed\n");
1705 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1707 dev_printk(KERN_ERR, &pdev->dev,
1708 "32-bit DMA enable failed\n");
1711 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1713 dev_printk(KERN_ERR, &pdev->dev,
1714 "32-bit consistent DMA enable failed\n");
1721 static void ahci_print_info(struct ata_host *host)
1723 struct ahci_host_priv *hpriv = host->private_data;
1724 struct pci_dev *pdev = to_pci_dev(host->dev);
1725 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1726 u32 vers, cap, impl, speed;
1727 const char *speed_s;
1731 vers = readl(mmio + HOST_VERSION);
1733 impl = hpriv->port_map;
1735 speed = (cap >> 20) & 0xf;
1738 else if (speed == 2)
1743 pci_read_config_word(pdev, 0x0a, &cc);
1744 if (cc == PCI_CLASS_STORAGE_IDE)
1746 else if (cc == PCI_CLASS_STORAGE_SATA)
1748 else if (cc == PCI_CLASS_STORAGE_RAID)
1753 dev_printk(KERN_INFO, &pdev->dev,
1754 "AHCI %02x%02x.%02x%02x "
1755 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1758 (vers >> 24) & 0xff,
1759 (vers >> 16) & 0xff,
1763 ((cap >> 8) & 0x1f) + 1,
1769 dev_printk(KERN_INFO, &pdev->dev,
1775 cap & (1 << 31) ? "64bit " : "",
1776 cap & (1 << 30) ? "ncq " : "",
1777 cap & (1 << 28) ? "ilck " : "",
1778 cap & (1 << 27) ? "stag " : "",
1779 cap & (1 << 26) ? "pm " : "",
1780 cap & (1 << 25) ? "led " : "",
1782 cap & (1 << 24) ? "clo " : "",
1783 cap & (1 << 19) ? "nz " : "",
1784 cap & (1 << 18) ? "only " : "",
1785 cap & (1 << 17) ? "pmp " : "",
1786 cap & (1 << 15) ? "pio " : "",
1787 cap & (1 << 14) ? "slum " : "",
1788 cap & (1 << 13) ? "part " : ""
1792 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1794 static int printed_version;
1795 struct ata_port_info pi = ahci_port_info[ent->driver_data];
1796 const struct ata_port_info *ppi[] = { &pi, NULL };
1797 struct device *dev = &pdev->dev;
1798 struct ahci_host_priv *hpriv;
1799 struct ata_host *host;
1804 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1806 if (!printed_version++)
1807 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1809 /* acquire resources */
1810 rc = pcim_enable_device(pdev);
1814 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1816 pcim_pin_device(pdev);
1820 if ((pi.flags & AHCI_FLAG_NO_MSI) || pci_enable_msi(pdev))
1823 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1827 /* save initial config */
1828 ahci_save_initial_config(pdev, &pi, hpriv);
1831 if (hpriv->cap & HOST_CAP_NCQ)
1832 pi.flags |= ATA_FLAG_NCQ;
1834 host = ata_host_alloc_pinfo(&pdev->dev, ppi, fls(hpriv->port_map));
1837 host->iomap = pcim_iomap_table(pdev);
1838 host->private_data = hpriv;
1840 for (i = 0; i < host->n_ports; i++) {
1841 struct ata_port *ap = host->ports[i];
1842 void __iomem *port_mmio = ahci_port_base(ap);
1844 /* standard SATA port setup */
1845 if (hpriv->port_map & (1 << i)) {
1846 ap->ioaddr.cmd_addr = port_mmio;
1847 ap->ioaddr.scr_addr = port_mmio + PORT_SCR;
1850 /* disabled/not-implemented port */
1852 ap->ops = &ata_dummy_port_ops;
1855 /* initialize adapter */
1856 rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
1860 rc = ahci_reset_controller(host);
1864 ahci_init_controller(host);
1865 ahci_print_info(host);
1867 pci_set_master(pdev);
1868 return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
1872 static int __init ahci_init(void)
1874 return pci_register_driver(&ahci_pci_driver);
1877 static void __exit ahci_exit(void)
1879 pci_unregister_driver(&ahci_pci_driver);
1883 MODULE_AUTHOR("Jeff Garzik");
1884 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1885 MODULE_LICENSE("GPL");
1886 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1887 MODULE_VERSION(DRV_VERSION);
1889 module_init(ahci_init);
1890 module_exit(ahci_exit);