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_SNTF = (1 << 29), /* SNotification register */
103 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
104 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
106 /* registers for each SATA port */
107 PORT_LST_ADDR = 0x00, /* command list DMA addr */
108 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
109 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
110 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
111 PORT_IRQ_STAT = 0x10, /* interrupt status */
112 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
113 PORT_CMD = 0x18, /* port command */
114 PORT_TFDATA = 0x20, /* taskfile data */
115 PORT_SIG = 0x24, /* device TF signature */
116 PORT_CMD_ISSUE = 0x38, /* command issue */
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 */
121 PORT_SCR_NTF = 0x3c, /* SATA phy register: SNotification */
123 /* PORT_IRQ_{STAT,MASK} bits */
124 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
125 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
126 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
127 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
128 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
129 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
130 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
131 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
133 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
134 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
135 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
136 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
137 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
138 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
139 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
140 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
141 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
143 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
148 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
150 PORT_IRQ_HBUS_DATA_ERR,
151 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
152 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
153 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
156 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
157 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
158 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
159 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
160 PORT_CMD_CLO = (1 << 3), /* Command list override */
161 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
162 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
163 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
165 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
166 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
167 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
168 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
171 AHCI_FLAG_NO_NCQ = (1 << 24),
172 AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */
173 AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */
174 AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */
175 AHCI_FLAG_32BIT_ONLY = (1 << 28), /* force 32bit */
176 AHCI_FLAG_MV_PATA = (1 << 29), /* PATA port */
177 AHCI_FLAG_NO_MSI = (1 << 30), /* no PCI MSI */
178 AHCI_FLAG_NO_HOTPLUG = (1 << 31), /* ignore PxSERR.DIAG.N */
180 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
181 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
183 AHCI_LFLAG_COMMON = ATA_LFLAG_SKIP_D2H_BSY,
186 struct ahci_cmd_hdr {
201 struct ahci_host_priv {
202 u32 cap; /* cap to use */
203 u32 port_map; /* port map to use */
204 u32 saved_cap; /* saved initial cap */
205 u32 saved_port_map; /* saved initial port_map */
208 struct ahci_port_priv {
209 struct ahci_cmd_hdr *cmd_slot;
210 dma_addr_t cmd_slot_dma;
212 dma_addr_t cmd_tbl_dma;
214 dma_addr_t rx_fis_dma;
215 /* for NCQ spurious interrupt analysis */
216 unsigned int ncq_saw_d2h:1;
217 unsigned int ncq_saw_dmas:1;
218 unsigned int ncq_saw_sdb:1;
219 u32 intr_mask; /* interrupts to enable */
222 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
223 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
224 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
225 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
226 static void ahci_irq_clear(struct ata_port *ap);
227 static int ahci_port_start(struct ata_port *ap);
228 static void ahci_port_stop(struct ata_port *ap);
229 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
230 static void ahci_qc_prep(struct ata_queued_cmd *qc);
231 static u8 ahci_check_status(struct ata_port *ap);
232 static void ahci_freeze(struct ata_port *ap);
233 static void ahci_thaw(struct ata_port *ap);
234 static void ahci_error_handler(struct ata_port *ap);
235 static void ahci_vt8251_error_handler(struct ata_port *ap);
236 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
237 static int ahci_port_resume(struct ata_port *ap);
238 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl);
239 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
242 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
243 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
244 static int ahci_pci_device_resume(struct pci_dev *pdev);
247 static struct scsi_host_template ahci_sht = {
248 .module = THIS_MODULE,
250 .ioctl = ata_scsi_ioctl,
251 .queuecommand = ata_scsi_queuecmd,
252 .change_queue_depth = ata_scsi_change_queue_depth,
253 .can_queue = AHCI_MAX_CMDS - 1,
254 .this_id = ATA_SHT_THIS_ID,
255 .sg_tablesize = AHCI_MAX_SG,
256 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
257 .emulated = ATA_SHT_EMULATED,
258 .use_clustering = AHCI_USE_CLUSTERING,
259 .proc_name = DRV_NAME,
260 .dma_boundary = AHCI_DMA_BOUNDARY,
261 .slave_configure = ata_scsi_slave_config,
262 .slave_destroy = ata_scsi_slave_destroy,
263 .bios_param = ata_std_bios_param,
266 static const struct ata_port_operations ahci_ops = {
267 .check_status = ahci_check_status,
268 .check_altstatus = ahci_check_status,
269 .dev_select = ata_noop_dev_select,
271 .tf_read = ahci_tf_read,
273 .qc_prep = ahci_qc_prep,
274 .qc_issue = ahci_qc_issue,
276 .irq_clear = ahci_irq_clear,
278 .scr_read = ahci_scr_read,
279 .scr_write = ahci_scr_write,
281 .freeze = ahci_freeze,
284 .error_handler = ahci_error_handler,
285 .post_internal_cmd = ahci_post_internal_cmd,
288 .port_suspend = ahci_port_suspend,
289 .port_resume = ahci_port_resume,
292 .port_start = ahci_port_start,
293 .port_stop = ahci_port_stop,
296 static const struct ata_port_operations ahci_vt8251_ops = {
297 .check_status = ahci_check_status,
298 .check_altstatus = ahci_check_status,
299 .dev_select = ata_noop_dev_select,
301 .tf_read = ahci_tf_read,
303 .qc_prep = ahci_qc_prep,
304 .qc_issue = ahci_qc_issue,
306 .irq_clear = ahci_irq_clear,
308 .scr_read = ahci_scr_read,
309 .scr_write = ahci_scr_write,
311 .freeze = ahci_freeze,
314 .error_handler = ahci_vt8251_error_handler,
315 .post_internal_cmd = ahci_post_internal_cmd,
318 .port_suspend = ahci_port_suspend,
319 .port_resume = ahci_port_resume,
322 .port_start = ahci_port_start,
323 .port_stop = ahci_port_stop,
326 static const struct ata_port_info ahci_port_info[] = {
329 .flags = AHCI_FLAG_COMMON,
330 .link_flags = AHCI_LFLAG_COMMON,
331 .pio_mask = 0x1f, /* pio0-4 */
332 .udma_mask = ATA_UDMA6,
333 .port_ops = &ahci_ops,
337 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_HONOR_PI,
338 .link_flags = AHCI_LFLAG_COMMON,
339 .pio_mask = 0x1f, /* pio0-4 */
340 .udma_mask = ATA_UDMA6,
341 .port_ops = &ahci_ops,
343 /* board_ahci_vt8251 */
345 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_NO_NCQ,
346 .link_flags = AHCI_LFLAG_COMMON | ATA_LFLAG_HRST_TO_RESUME,
347 .pio_mask = 0x1f, /* pio0-4 */
348 .udma_mask = ATA_UDMA6,
349 .port_ops = &ahci_vt8251_ops,
351 /* board_ahci_ign_iferr */
353 .flags = AHCI_FLAG_COMMON | AHCI_FLAG_IGN_IRQ_IF_ERR,
354 .link_flags = AHCI_LFLAG_COMMON,
355 .pio_mask = 0x1f, /* pio0-4 */
356 .udma_mask = ATA_UDMA6,
357 .port_ops = &ahci_ops,
359 /* board_ahci_sb600 */
361 .flags = AHCI_FLAG_COMMON |
362 AHCI_FLAG_IGN_SERR_INTERNAL |
363 AHCI_FLAG_32BIT_ONLY,
364 .link_flags = AHCI_LFLAG_COMMON,
365 .pio_mask = 0x1f, /* pio0-4 */
366 .udma_mask = ATA_UDMA6,
367 .port_ops = &ahci_ops,
372 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
373 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
374 AHCI_FLAG_HONOR_PI | AHCI_FLAG_NO_NCQ |
375 AHCI_FLAG_NO_MSI | AHCI_FLAG_MV_PATA,
376 .link_flags = AHCI_LFLAG_COMMON,
377 .pio_mask = 0x1f, /* pio0-4 */
378 .udma_mask = ATA_UDMA6,
379 .port_ops = &ahci_ops,
383 static const struct pci_device_id ahci_pci_tbl[] = {
385 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
386 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
387 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
388 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
389 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
390 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
391 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
392 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
393 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
394 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
395 { PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */
396 { PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */
397 { PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */
398 { PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */
399 { PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */
400 { PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */
401 { PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */
402 { PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */
403 { PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */
404 { PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */
405 { PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */
406 { PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */
407 { PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */
408 { PCI_VDEVICE(INTEL, 0x292c), board_ahci_pi }, /* ICH9M */
409 { PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */
410 { PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */
411 { PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */
413 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
414 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
415 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
418 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
419 { PCI_VDEVICE(ATI, 0x4390), board_ahci_sb600 }, /* ATI SB700/800 */
420 { PCI_VDEVICE(ATI, 0x4391), board_ahci_sb600 }, /* ATI SB700/800 */
421 { PCI_VDEVICE(ATI, 0x4392), board_ahci_sb600 }, /* ATI SB700/800 */
422 { PCI_VDEVICE(ATI, 0x4393), board_ahci_sb600 }, /* ATI SB700/800 */
423 { PCI_VDEVICE(ATI, 0x4394), board_ahci_sb600 }, /* ATI SB700/800 */
424 { PCI_VDEVICE(ATI, 0x4395), board_ahci_sb600 }, /* ATI SB700/800 */
427 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
428 { PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */
431 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
432 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
433 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
434 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
435 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
436 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
437 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
438 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
439 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
440 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
441 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
442 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
443 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
444 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
445 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
446 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
447 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
448 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
449 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
450 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
451 { PCI_VDEVICE(NVIDIA, 0x07f0), board_ahci }, /* MCP73 */
452 { PCI_VDEVICE(NVIDIA, 0x07f1), board_ahci }, /* MCP73 */
453 { PCI_VDEVICE(NVIDIA, 0x07f2), board_ahci }, /* MCP73 */
454 { PCI_VDEVICE(NVIDIA, 0x07f3), board_ahci }, /* MCP73 */
455 { PCI_VDEVICE(NVIDIA, 0x07f4), board_ahci }, /* MCP73 */
456 { PCI_VDEVICE(NVIDIA, 0x07f5), board_ahci }, /* MCP73 */
457 { PCI_VDEVICE(NVIDIA, 0x07f6), board_ahci }, /* MCP73 */
458 { PCI_VDEVICE(NVIDIA, 0x07f7), board_ahci }, /* MCP73 */
459 { PCI_VDEVICE(NVIDIA, 0x07f8), board_ahci }, /* MCP73 */
460 { PCI_VDEVICE(NVIDIA, 0x07f9), board_ahci }, /* MCP73 */
461 { PCI_VDEVICE(NVIDIA, 0x07fa), board_ahci }, /* MCP73 */
462 { PCI_VDEVICE(NVIDIA, 0x07fb), board_ahci }, /* MCP73 */
463 { PCI_VDEVICE(NVIDIA, 0x0ad0), board_ahci }, /* MCP77 */
464 { PCI_VDEVICE(NVIDIA, 0x0ad1), board_ahci }, /* MCP77 */
465 { PCI_VDEVICE(NVIDIA, 0x0ad2), board_ahci }, /* MCP77 */
466 { PCI_VDEVICE(NVIDIA, 0x0ad3), board_ahci }, /* MCP77 */
467 { PCI_VDEVICE(NVIDIA, 0x0ad4), board_ahci }, /* MCP77 */
468 { PCI_VDEVICE(NVIDIA, 0x0ad5), board_ahci }, /* MCP77 */
469 { PCI_VDEVICE(NVIDIA, 0x0ad6), board_ahci }, /* MCP77 */
470 { PCI_VDEVICE(NVIDIA, 0x0ad7), board_ahci }, /* MCP77 */
471 { PCI_VDEVICE(NVIDIA, 0x0ad8), board_ahci }, /* MCP77 */
472 { PCI_VDEVICE(NVIDIA, 0x0ad9), board_ahci }, /* MCP77 */
473 { PCI_VDEVICE(NVIDIA, 0x0ada), board_ahci }, /* MCP77 */
474 { PCI_VDEVICE(NVIDIA, 0x0adb), board_ahci }, /* MCP77 */
477 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
478 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
479 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
482 { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
484 /* Generic, PCI class code for AHCI */
485 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
486 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
488 { } /* terminate list */
492 static struct pci_driver ahci_pci_driver = {
494 .id_table = ahci_pci_tbl,
495 .probe = ahci_init_one,
496 .remove = ata_pci_remove_one,
498 .suspend = ahci_pci_device_suspend,
499 .resume = ahci_pci_device_resume,
504 static inline int ahci_nr_ports(u32 cap)
506 return (cap & 0x1f) + 1;
509 static inline void __iomem *__ahci_port_base(struct ata_host *host,
510 unsigned int port_no)
512 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
514 return mmio + 0x100 + (port_no * 0x80);
517 static inline void __iomem *ahci_port_base(struct ata_port *ap)
519 return __ahci_port_base(ap->host, ap->port_no);
523 * ahci_save_initial_config - Save and fixup initial config values
524 * @pdev: target PCI device
525 * @pi: associated ATA port info
526 * @hpriv: host private area to store config values
528 * Some registers containing configuration info might be setup by
529 * BIOS and might be cleared on reset. This function saves the
530 * initial values of those registers into @hpriv such that they
531 * can be restored after controller reset.
533 * If inconsistent, config values are fixed up by this function.
538 static void ahci_save_initial_config(struct pci_dev *pdev,
539 const struct ata_port_info *pi,
540 struct ahci_host_priv *hpriv)
542 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
546 /* Values prefixed with saved_ are written back to host after
547 * reset. Values without are used for driver operation.
549 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
550 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
552 /* some chips have errata preventing 64bit use */
553 if ((cap & HOST_CAP_64) && (pi->flags & AHCI_FLAG_32BIT_ONLY)) {
554 dev_printk(KERN_INFO, &pdev->dev,
555 "controller can't do 64bit DMA, forcing 32bit\n");
559 if ((cap & HOST_CAP_NCQ) && (pi->flags & AHCI_FLAG_NO_NCQ)) {
560 dev_printk(KERN_INFO, &pdev->dev,
561 "controller can't do NCQ, turning off CAP_NCQ\n");
562 cap &= ~HOST_CAP_NCQ;
565 /* fixup zero port_map */
567 port_map = (1 << ahci_nr_ports(cap)) - 1;
568 dev_printk(KERN_WARNING, &pdev->dev,
569 "PORTS_IMPL is zero, forcing 0x%x\n", port_map);
571 /* write the fixed up value to the PI register */
572 hpriv->saved_port_map = port_map;
576 * Temporary Marvell 6145 hack: PATA port presence
577 * is asserted through the standard AHCI port
578 * presence register, as bit 4 (counting from 0)
580 if (pi->flags & AHCI_FLAG_MV_PATA) {
581 dev_printk(KERN_ERR, &pdev->dev,
582 "MV_AHCI HACK: port_map %x -> %x\n",
584 hpriv->port_map & 0xf);
589 /* cross check port_map and cap.n_ports */
590 if (pi->flags & AHCI_FLAG_HONOR_PI) {
591 u32 tmp_port_map = port_map;
592 int n_ports = ahci_nr_ports(cap);
594 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
595 if (tmp_port_map & (1 << i)) {
597 tmp_port_map &= ~(1 << i);
601 /* Whine if inconsistent. No need to update cap.
602 * port_map is used to determine number of ports.
604 if (n_ports || tmp_port_map)
605 dev_printk(KERN_WARNING, &pdev->dev,
606 "nr_ports (%u) and implemented port map "
607 "(0x%x) don't match\n",
608 ahci_nr_ports(cap), port_map);
610 /* fabricate port_map from cap.nr_ports */
611 port_map = (1 << ahci_nr_ports(cap)) - 1;
614 /* record values to use during operation */
616 hpriv->port_map = port_map;
620 * ahci_restore_initial_config - Restore initial config
621 * @host: target ATA host
623 * Restore initial config stored by ahci_save_initial_config().
628 static void ahci_restore_initial_config(struct ata_host *host)
630 struct ahci_host_priv *hpriv = host->private_data;
631 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
633 writel(hpriv->saved_cap, mmio + HOST_CAP);
634 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
635 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
638 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
640 static const int offset[] = {
641 [SCR_STATUS] = PORT_SCR_STAT,
642 [SCR_CONTROL] = PORT_SCR_CTL,
643 [SCR_ERROR] = PORT_SCR_ERR,
644 [SCR_ACTIVE] = PORT_SCR_ACT,
645 [SCR_NOTIFICATION] = PORT_SCR_NTF,
647 struct ahci_host_priv *hpriv = ap->host->private_data;
649 if (sc_reg < ARRAY_SIZE(offset) &&
650 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
651 return offset[sc_reg];
655 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
657 void __iomem *port_mmio = ahci_port_base(ap);
658 int offset = ahci_scr_offset(ap, sc_reg);
661 *val = readl(port_mmio + offset);
667 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
669 void __iomem *port_mmio = ahci_port_base(ap);
670 int offset = ahci_scr_offset(ap, sc_reg);
673 writel(val, port_mmio + offset);
679 static void ahci_start_engine(struct ata_port *ap)
681 void __iomem *port_mmio = ahci_port_base(ap);
685 tmp = readl(port_mmio + PORT_CMD);
686 tmp |= PORT_CMD_START;
687 writel(tmp, port_mmio + PORT_CMD);
688 readl(port_mmio + PORT_CMD); /* flush */
691 static int ahci_stop_engine(struct ata_port *ap)
693 void __iomem *port_mmio = ahci_port_base(ap);
696 tmp = readl(port_mmio + PORT_CMD);
698 /* check if the HBA is idle */
699 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
702 /* setting HBA to idle */
703 tmp &= ~PORT_CMD_START;
704 writel(tmp, port_mmio + PORT_CMD);
706 /* wait for engine to stop. This could be as long as 500 msec */
707 tmp = ata_wait_register(port_mmio + PORT_CMD,
708 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
709 if (tmp & PORT_CMD_LIST_ON)
715 static void ahci_start_fis_rx(struct ata_port *ap)
717 void __iomem *port_mmio = ahci_port_base(ap);
718 struct ahci_host_priv *hpriv = ap->host->private_data;
719 struct ahci_port_priv *pp = ap->private_data;
722 /* set FIS registers */
723 if (hpriv->cap & HOST_CAP_64)
724 writel((pp->cmd_slot_dma >> 16) >> 16,
725 port_mmio + PORT_LST_ADDR_HI);
726 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
728 if (hpriv->cap & HOST_CAP_64)
729 writel((pp->rx_fis_dma >> 16) >> 16,
730 port_mmio + PORT_FIS_ADDR_HI);
731 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
733 /* enable FIS reception */
734 tmp = readl(port_mmio + PORT_CMD);
735 tmp |= PORT_CMD_FIS_RX;
736 writel(tmp, port_mmio + PORT_CMD);
739 readl(port_mmio + PORT_CMD);
742 static int ahci_stop_fis_rx(struct ata_port *ap)
744 void __iomem *port_mmio = ahci_port_base(ap);
747 /* disable FIS reception */
748 tmp = readl(port_mmio + PORT_CMD);
749 tmp &= ~PORT_CMD_FIS_RX;
750 writel(tmp, port_mmio + PORT_CMD);
752 /* wait for completion, spec says 500ms, give it 1000 */
753 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
754 PORT_CMD_FIS_ON, 10, 1000);
755 if (tmp & PORT_CMD_FIS_ON)
761 static void ahci_power_up(struct ata_port *ap)
763 struct ahci_host_priv *hpriv = ap->host->private_data;
764 void __iomem *port_mmio = ahci_port_base(ap);
767 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
770 if (hpriv->cap & HOST_CAP_SSS) {
771 cmd |= PORT_CMD_SPIN_UP;
772 writel(cmd, port_mmio + PORT_CMD);
776 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
780 static void ahci_power_down(struct ata_port *ap)
782 struct ahci_host_priv *hpriv = ap->host->private_data;
783 void __iomem *port_mmio = ahci_port_base(ap);
786 if (!(hpriv->cap & HOST_CAP_SSS))
789 /* put device into listen mode, first set PxSCTL.DET to 0 */
790 scontrol = readl(port_mmio + PORT_SCR_CTL);
792 writel(scontrol, port_mmio + PORT_SCR_CTL);
794 /* then set PxCMD.SUD to 0 */
795 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
796 cmd &= ~PORT_CMD_SPIN_UP;
797 writel(cmd, port_mmio + PORT_CMD);
801 static void ahci_start_port(struct ata_port *ap)
803 /* enable FIS reception */
804 ahci_start_fis_rx(ap);
807 ahci_start_engine(ap);
810 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
815 rc = ahci_stop_engine(ap);
817 *emsg = "failed to stop engine";
821 /* disable FIS reception */
822 rc = ahci_stop_fis_rx(ap);
824 *emsg = "failed stop FIS RX";
831 static int ahci_reset_controller(struct ata_host *host)
833 struct pci_dev *pdev = to_pci_dev(host->dev);
834 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
837 /* global controller reset */
838 tmp = readl(mmio + HOST_CTL);
839 if ((tmp & HOST_RESET) == 0) {
840 writel(tmp | HOST_RESET, mmio + HOST_CTL);
841 readl(mmio + HOST_CTL); /* flush */
844 /* reset must complete within 1 second, or
845 * the hardware should be considered fried.
849 tmp = readl(mmio + HOST_CTL);
850 if (tmp & HOST_RESET) {
851 dev_printk(KERN_ERR, host->dev,
852 "controller reset failed (0x%x)\n", tmp);
856 /* turn on AHCI mode */
857 writel(HOST_AHCI_EN, mmio + HOST_CTL);
858 (void) readl(mmio + HOST_CTL); /* flush */
860 /* some registers might be cleared on reset. restore initial values */
861 ahci_restore_initial_config(host);
863 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
867 pci_read_config_word(pdev, 0x92, &tmp16);
869 pci_write_config_word(pdev, 0x92, tmp16);
875 static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
876 int port_no, void __iomem *mmio,
877 void __iomem *port_mmio)
879 const char *emsg = NULL;
883 /* make sure port is not active */
884 rc = ahci_deinit_port(ap, &emsg);
886 dev_printk(KERN_WARNING, &pdev->dev,
887 "%s (%d)\n", emsg, rc);
890 tmp = readl(port_mmio + PORT_SCR_ERR);
891 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
892 writel(tmp, port_mmio + PORT_SCR_ERR);
895 tmp = readl(port_mmio + PORT_IRQ_STAT);
896 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
898 writel(tmp, port_mmio + PORT_IRQ_STAT);
900 writel(1 << port_no, mmio + HOST_IRQ_STAT);
903 static void ahci_init_controller(struct ata_host *host)
905 struct pci_dev *pdev = to_pci_dev(host->dev);
906 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
908 void __iomem *port_mmio;
911 if (host->ports[0]->flags & AHCI_FLAG_MV_PATA) {
912 port_mmio = __ahci_port_base(host, 4);
914 writel(0, port_mmio + PORT_IRQ_MASK);
917 tmp = readl(port_mmio + PORT_IRQ_STAT);
918 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
920 writel(tmp, port_mmio + PORT_IRQ_STAT);
923 for (i = 0; i < host->n_ports; i++) {
924 struct ata_port *ap = host->ports[i];
926 port_mmio = ahci_port_base(ap);
927 if (ata_port_is_dummy(ap))
930 ahci_port_init(pdev, ap, i, mmio, port_mmio);
933 tmp = readl(mmio + HOST_CTL);
934 VPRINTK("HOST_CTL 0x%x\n", tmp);
935 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
936 tmp = readl(mmio + HOST_CTL);
937 VPRINTK("HOST_CTL 0x%x\n", tmp);
940 static unsigned int ahci_dev_classify(struct ata_port *ap)
942 void __iomem *port_mmio = ahci_port_base(ap);
943 struct ata_taskfile tf;
946 tmp = readl(port_mmio + PORT_SIG);
947 tf.lbah = (tmp >> 24) & 0xff;
948 tf.lbam = (tmp >> 16) & 0xff;
949 tf.lbal = (tmp >> 8) & 0xff;
950 tf.nsect = (tmp) & 0xff;
952 return ata_dev_classify(&tf);
955 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
958 dma_addr_t cmd_tbl_dma;
960 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
962 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
963 pp->cmd_slot[tag].status = 0;
964 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
965 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
968 static int ahci_kick_engine(struct ata_port *ap, int force_restart)
970 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
971 struct ahci_host_priv *hpriv = ap->host->private_data;
975 /* do we need to kick the port? */
976 busy = ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ);
977 if (!busy && !force_restart)
981 rc = ahci_stop_engine(ap);
985 /* need to do CLO? */
991 if (!(hpriv->cap & HOST_CAP_CLO)) {
997 tmp = readl(port_mmio + PORT_CMD);
999 writel(tmp, port_mmio + PORT_CMD);
1002 tmp = ata_wait_register(port_mmio + PORT_CMD,
1003 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1004 if (tmp & PORT_CMD_CLO)
1007 /* restart engine */
1009 ahci_start_engine(ap);
1013 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1014 struct ata_taskfile *tf, int is_cmd, u16 flags,
1015 unsigned long timeout_msec)
1017 const u32 cmd_fis_len = 5; /* five dwords */
1018 struct ahci_port_priv *pp = ap->private_data;
1019 void __iomem *port_mmio = ahci_port_base(ap);
1020 u8 *fis = pp->cmd_tbl;
1023 /* prep the command */
1024 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1025 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1028 writel(1, port_mmio + PORT_CMD_ISSUE);
1031 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
1034 ahci_kick_engine(ap, 1);
1038 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1043 static int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1044 int pmp, unsigned long deadline)
1046 struct ata_port *ap = link->ap;
1047 const char *reason = NULL;
1048 unsigned long now, msecs;
1049 struct ata_taskfile tf;
1054 if (ata_link_offline(link)) {
1055 DPRINTK("PHY reports no device\n");
1056 *class = ATA_DEV_NONE;
1060 /* prepare for SRST (AHCI-1.1 10.4.1) */
1061 rc = ahci_kick_engine(ap, 1);
1063 ata_link_printk(link, KERN_WARNING,
1064 "failed to reset engine (errno=%d)", rc);
1066 ata_tf_init(link->device, &tf);
1068 /* issue the first D2H Register FIS */
1071 if (time_after(now, deadline))
1072 msecs = jiffies_to_msecs(deadline - now);
1075 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1076 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1078 reason = "1st FIS failed";
1082 /* spec says at least 5us, but be generous and sleep for 1ms */
1085 /* issue the second D2H Register FIS */
1086 tf.ctl &= ~ATA_SRST;
1087 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1089 /* spec mandates ">= 2ms" before checking status.
1090 * We wait 150ms, because that was the magic delay used for
1091 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
1092 * between when the ATA command register is written, and then
1093 * status is checked. Because waiting for "a while" before
1094 * checking status is fine, post SRST, we perform this magic
1095 * delay here as well.
1099 rc = ata_wait_ready(ap, deadline);
1100 /* link occupied, -ENODEV too is an error */
1102 reason = "device not ready";
1105 *class = ahci_dev_classify(ap);
1107 DPRINTK("EXIT, class=%u\n", *class);
1111 ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
1115 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1116 unsigned long deadline)
1118 return ahci_do_softreset(link, class, 0, deadline);
1121 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1122 unsigned long deadline)
1124 struct ata_port *ap = link->ap;
1125 struct ahci_port_priv *pp = ap->private_data;
1126 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1127 struct ata_taskfile tf;
1132 ahci_stop_engine(ap);
1134 /* clear D2H reception area to properly wait for D2H FIS */
1135 ata_tf_init(link->device, &tf);
1137 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1139 rc = sata_std_hardreset(link, class, deadline);
1141 ahci_start_engine(ap);
1143 if (rc == 0 && ata_link_online(link))
1144 *class = ahci_dev_classify(ap);
1145 if (*class == ATA_DEV_UNKNOWN)
1146 *class = ATA_DEV_NONE;
1148 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1152 static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
1153 unsigned long deadline)
1155 struct ata_port *ap = link->ap;
1161 ahci_stop_engine(ap);
1163 rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
1166 /* vt8251 needs SError cleared for the port to operate */
1167 ahci_scr_read(ap, SCR_ERROR, &serror);
1168 ahci_scr_write(ap, SCR_ERROR, serror);
1170 ahci_start_engine(ap);
1172 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1174 /* vt8251 doesn't clear BSY on signature FIS reception,
1175 * request follow-up softreset.
1177 return rc ?: -EAGAIN;
1180 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1182 struct ata_port *ap = link->ap;
1183 void __iomem *port_mmio = ahci_port_base(ap);
1186 ata_std_postreset(link, class);
1188 /* Make sure port's ATAPI bit is set appropriately */
1189 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1190 if (*class == ATA_DEV_ATAPI)
1191 new_tmp |= PORT_CMD_ATAPI;
1193 new_tmp &= ~PORT_CMD_ATAPI;
1194 if (new_tmp != tmp) {
1195 writel(new_tmp, port_mmio + PORT_CMD);
1196 readl(port_mmio + PORT_CMD); /* flush */
1200 static u8 ahci_check_status(struct ata_port *ap)
1202 void __iomem *mmio = ap->ioaddr.cmd_addr;
1204 return readl(mmio + PORT_TFDATA) & 0xFF;
1207 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
1209 struct ahci_port_priv *pp = ap->private_data;
1210 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1212 ata_tf_from_fis(d2h_fis, tf);
1215 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1217 struct scatterlist *sg;
1218 struct ahci_sg *ahci_sg;
1219 unsigned int n_sg = 0;
1224 * Next, the S/G list.
1226 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1227 ata_for_each_sg(sg, qc) {
1228 dma_addr_t addr = sg_dma_address(sg);
1229 u32 sg_len = sg_dma_len(sg);
1231 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1232 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1233 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
1242 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1244 struct ata_port *ap = qc->ap;
1245 struct ahci_port_priv *pp = ap->private_data;
1246 int is_atapi = is_atapi_taskfile(&qc->tf);
1249 const u32 cmd_fis_len = 5; /* five dwords */
1250 unsigned int n_elem;
1253 * Fill in command table information. First, the header,
1254 * a SATA Register - Host to Device command FIS.
1256 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1258 ata_tf_to_fis(&qc->tf, 0, 1, cmd_tbl);
1260 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1261 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1265 if (qc->flags & ATA_QCFLAG_DMAMAP)
1266 n_elem = ahci_fill_sg(qc, cmd_tbl);
1269 * Fill in command slot information.
1271 opts = cmd_fis_len | n_elem << 16;
1272 if (qc->tf.flags & ATA_TFLAG_WRITE)
1273 opts |= AHCI_CMD_WRITE;
1275 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1277 ahci_fill_cmd_slot(pp, qc->tag, opts);
1280 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1282 struct ahci_port_priv *pp = ap->private_data;
1283 struct ata_eh_info *ehi = &ap->link.eh_info;
1284 unsigned int err_mask = 0, action = 0;
1285 struct ata_queued_cmd *qc;
1288 ata_ehi_clear_desc(ehi);
1290 /* AHCI needs SError cleared; otherwise, it might lock up */
1291 ahci_scr_read(ap, SCR_ERROR, &serror);
1292 ahci_scr_write(ap, SCR_ERROR, serror);
1294 /* analyze @irq_stat */
1295 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1297 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1298 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1299 irq_stat &= ~PORT_IRQ_IF_ERR;
1301 if (irq_stat & PORT_IRQ_TF_ERR) {
1302 err_mask |= AC_ERR_DEV;
1303 if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
1304 serror &= ~SERR_INTERNAL;
1307 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1308 err_mask |= AC_ERR_HOST_BUS;
1309 action |= ATA_EH_SOFTRESET;
1312 if (irq_stat & PORT_IRQ_IF_ERR) {
1313 err_mask |= AC_ERR_ATA_BUS;
1314 action |= ATA_EH_SOFTRESET;
1315 ata_ehi_push_desc(ehi, "interface fatal error");
1318 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1319 ata_ehi_hotplugged(ehi);
1320 ata_ehi_push_desc(ehi, "%s", irq_stat & PORT_IRQ_CONNECT ?
1321 "connection status changed" : "PHY RDY changed");
1324 if (irq_stat & PORT_IRQ_UNK_FIS) {
1325 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1327 err_mask |= AC_ERR_HSM;
1328 action |= ATA_EH_SOFTRESET;
1329 ata_ehi_push_desc(ehi, "unknown FIS %08x %08x %08x %08x",
1330 unk[0], unk[1], unk[2], unk[3]);
1333 /* okay, let's hand over to EH */
1334 ehi->serror |= serror;
1335 ehi->action |= action;
1337 qc = ata_qc_from_tag(ap, ap->link.active_tag);
1339 qc->err_mask |= err_mask;
1341 ehi->err_mask |= err_mask;
1343 if (irq_stat & PORT_IRQ_FREEZE)
1344 ata_port_freeze(ap);
1349 static void ahci_port_intr(struct ata_port *ap)
1351 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1352 struct ata_eh_info *ehi = &ap->link.eh_info;
1353 struct ahci_port_priv *pp = ap->private_data;
1354 u32 status, qc_active;
1355 int rc, known_irq = 0;
1357 status = readl(port_mmio + PORT_IRQ_STAT);
1358 writel(status, port_mmio + PORT_IRQ_STAT);
1360 if (unlikely(status & PORT_IRQ_ERROR)) {
1361 ahci_error_intr(ap, status);
1365 if (status & PORT_IRQ_SDB_FIS) {
1367 * if this is an ATAPI device with AN turned on,
1368 * then we should interrogate the device to
1369 * determine the cause of the interrupt
1371 * for AN - this we should check the SDB FIS
1372 * and find the I and N bits set
1374 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1375 u32 f0 = le32_to_cpu(f[0]);
1377 /* check the 'N' bit in word 0 of the FIS */
1378 if (f0 & (1 << 15)) {
1379 int port_addr = ((f0 & 0x00000f00) >> 8);
1380 struct ata_device *adev;
1381 if (port_addr < ATA_MAX_DEVICES) {
1382 adev = &ap->link.device[port_addr];
1383 if (adev->flags & ATA_DFLAG_AN)
1384 ata_scsi_media_change_notify(adev);
1389 if (ap->link.sactive)
1390 qc_active = readl(port_mmio + PORT_SCR_ACT);
1392 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1394 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1398 ehi->err_mask |= AC_ERR_HSM;
1399 ehi->action |= ATA_EH_SOFTRESET;
1400 ata_port_freeze(ap);
1404 /* hmmm... a spurious interupt */
1406 /* if !NCQ, ignore. No modern ATA device has broken HSM
1407 * implementation for non-NCQ commands.
1409 if (!ap->link.sactive)
1412 if (status & PORT_IRQ_D2H_REG_FIS) {
1413 if (!pp->ncq_saw_d2h)
1414 ata_port_printk(ap, KERN_INFO,
1415 "D2H reg with I during NCQ, "
1416 "this message won't be printed again\n");
1417 pp->ncq_saw_d2h = 1;
1421 if (status & PORT_IRQ_DMAS_FIS) {
1422 if (!pp->ncq_saw_dmas)
1423 ata_port_printk(ap, KERN_INFO,
1424 "DMAS FIS during NCQ, "
1425 "this message won't be printed again\n");
1426 pp->ncq_saw_dmas = 1;
1430 if (status & PORT_IRQ_SDB_FIS) {
1431 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1433 if (le32_to_cpu(f[1])) {
1434 /* SDB FIS containing spurious completions
1435 * might be dangerous, whine and fail commands
1436 * with HSM violation. EH will turn off NCQ
1437 * after several such failures.
1439 ata_ehi_push_desc(ehi,
1440 "spurious completions during NCQ "
1441 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1442 readl(port_mmio + PORT_CMD_ISSUE),
1443 readl(port_mmio + PORT_SCR_ACT),
1444 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1445 ehi->err_mask |= AC_ERR_HSM;
1446 ehi->action |= ATA_EH_SOFTRESET;
1447 ata_port_freeze(ap);
1449 if (!pp->ncq_saw_sdb)
1450 ata_port_printk(ap, KERN_INFO,
1451 "spurious SDB FIS %08x:%08x during NCQ, "
1452 "this message won't be printed again\n",
1453 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1454 pp->ncq_saw_sdb = 1;
1460 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1461 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1462 status, ap->link.active_tag, ap->link.sactive);
1465 static void ahci_irq_clear(struct ata_port *ap)
1470 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1472 struct ata_host *host = dev_instance;
1473 struct ahci_host_priv *hpriv;
1474 unsigned int i, handled = 0;
1476 u32 irq_stat, irq_ack = 0;
1480 hpriv = host->private_data;
1481 mmio = host->iomap[AHCI_PCI_BAR];
1483 /* sigh. 0xffffffff is a valid return from h/w */
1484 irq_stat = readl(mmio + HOST_IRQ_STAT);
1485 irq_stat &= hpriv->port_map;
1489 spin_lock(&host->lock);
1491 for (i = 0; i < host->n_ports; i++) {
1492 struct ata_port *ap;
1494 if (!(irq_stat & (1 << i)))
1497 ap = host->ports[i];
1500 VPRINTK("port %u\n", i);
1502 VPRINTK("port %u (no irq)\n", i);
1503 if (ata_ratelimit())
1504 dev_printk(KERN_WARNING, host->dev,
1505 "interrupt on disabled port %u\n", i);
1508 irq_ack |= (1 << i);
1512 writel(irq_ack, mmio + HOST_IRQ_STAT);
1516 spin_unlock(&host->lock);
1520 return IRQ_RETVAL(handled);
1523 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1525 struct ata_port *ap = qc->ap;
1526 void __iomem *port_mmio = ahci_port_base(ap);
1528 if (qc->tf.protocol == ATA_PROT_NCQ)
1529 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1530 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1531 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1536 static void ahci_freeze(struct ata_port *ap)
1538 void __iomem *port_mmio = ahci_port_base(ap);
1541 writel(0, port_mmio + PORT_IRQ_MASK);
1544 static void ahci_thaw(struct ata_port *ap)
1546 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1547 void __iomem *port_mmio = ahci_port_base(ap);
1549 struct ahci_port_priv *pp = ap->private_data;
1552 tmp = readl(port_mmio + PORT_IRQ_STAT);
1553 writel(tmp, port_mmio + PORT_IRQ_STAT);
1554 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1556 /* turn IRQ back on */
1557 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1560 static void ahci_error_handler(struct ata_port *ap)
1562 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1563 /* restart engine */
1564 ahci_stop_engine(ap);
1565 ahci_start_engine(ap);
1568 /* perform recovery */
1569 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
1573 static void ahci_vt8251_error_handler(struct ata_port *ap)
1575 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1576 /* restart engine */
1577 ahci_stop_engine(ap);
1578 ahci_start_engine(ap);
1581 /* perform recovery */
1582 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1586 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1588 struct ata_port *ap = qc->ap;
1590 /* make DMA engine forget about the failed command */
1591 if (qc->flags & ATA_QCFLAG_FAILED)
1592 ahci_kick_engine(ap, 1);
1595 static int ahci_port_resume(struct ata_port *ap)
1598 ahci_start_port(ap);
1604 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1606 const char *emsg = NULL;
1609 rc = ahci_deinit_port(ap, &emsg);
1611 ahci_power_down(ap);
1613 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1614 ahci_start_port(ap);
1620 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1622 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1623 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1626 if (mesg.event == PM_EVENT_SUSPEND) {
1627 /* AHCI spec rev1.1 section 8.3.3:
1628 * Software must disable interrupts prior to requesting a
1629 * transition of the HBA to D3 state.
1631 ctl = readl(mmio + HOST_CTL);
1632 ctl &= ~HOST_IRQ_EN;
1633 writel(ctl, mmio + HOST_CTL);
1634 readl(mmio + HOST_CTL); /* flush */
1637 return ata_pci_device_suspend(pdev, mesg);
1640 static int ahci_pci_device_resume(struct pci_dev *pdev)
1642 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1645 rc = ata_pci_device_do_resume(pdev);
1649 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1650 rc = ahci_reset_controller(host);
1654 ahci_init_controller(host);
1657 ata_host_resume(host);
1663 static int ahci_port_start(struct ata_port *ap)
1665 struct device *dev = ap->host->dev;
1666 struct ahci_port_priv *pp;
1671 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1675 rc = ata_pad_alloc(ap, dev);
1679 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1683 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1686 * First item in chunk of DMA memory: 32-slot command table,
1687 * 32 bytes each in size
1690 pp->cmd_slot_dma = mem_dma;
1692 mem += AHCI_CMD_SLOT_SZ;
1693 mem_dma += AHCI_CMD_SLOT_SZ;
1696 * Second item: Received-FIS area
1699 pp->rx_fis_dma = mem_dma;
1701 mem += AHCI_RX_FIS_SZ;
1702 mem_dma += AHCI_RX_FIS_SZ;
1705 * Third item: data area for storing a single command
1706 * and its scatter-gather table
1709 pp->cmd_tbl_dma = mem_dma;
1712 * Save off initial list of interrupts to be enabled.
1713 * This could be changed later
1715 pp->intr_mask = DEF_PORT_IRQ;
1717 ap->private_data = pp;
1719 /* engage engines, captain */
1720 return ahci_port_resume(ap);
1723 static void ahci_port_stop(struct ata_port *ap)
1725 const char *emsg = NULL;
1728 /* de-initialize port */
1729 rc = ahci_deinit_port(ap, &emsg);
1731 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1734 static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
1739 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1740 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1742 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1744 dev_printk(KERN_ERR, &pdev->dev,
1745 "64-bit DMA enable failed\n");
1750 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1752 dev_printk(KERN_ERR, &pdev->dev,
1753 "32-bit DMA enable failed\n");
1756 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1758 dev_printk(KERN_ERR, &pdev->dev,
1759 "32-bit consistent DMA enable failed\n");
1766 static void ahci_print_info(struct ata_host *host)
1768 struct ahci_host_priv *hpriv = host->private_data;
1769 struct pci_dev *pdev = to_pci_dev(host->dev);
1770 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1771 u32 vers, cap, impl, speed;
1772 const char *speed_s;
1776 vers = readl(mmio + HOST_VERSION);
1778 impl = hpriv->port_map;
1780 speed = (cap >> 20) & 0xf;
1783 else if (speed == 2)
1788 pci_read_config_word(pdev, 0x0a, &cc);
1789 if (cc == PCI_CLASS_STORAGE_IDE)
1791 else if (cc == PCI_CLASS_STORAGE_SATA)
1793 else if (cc == PCI_CLASS_STORAGE_RAID)
1798 dev_printk(KERN_INFO, &pdev->dev,
1799 "AHCI %02x%02x.%02x%02x "
1800 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1803 (vers >> 24) & 0xff,
1804 (vers >> 16) & 0xff,
1808 ((cap >> 8) & 0x1f) + 1,
1814 dev_printk(KERN_INFO, &pdev->dev,
1820 cap & (1 << 31) ? "64bit " : "",
1821 cap & (1 << 30) ? "ncq " : "",
1822 cap & (1 << 29) ? "sntf " : "",
1823 cap & (1 << 28) ? "ilck " : "",
1824 cap & (1 << 27) ? "stag " : "",
1825 cap & (1 << 26) ? "pm " : "",
1826 cap & (1 << 25) ? "led " : "",
1828 cap & (1 << 24) ? "clo " : "",
1829 cap & (1 << 19) ? "nz " : "",
1830 cap & (1 << 18) ? "only " : "",
1831 cap & (1 << 17) ? "pmp " : "",
1832 cap & (1 << 15) ? "pio " : "",
1833 cap & (1 << 14) ? "slum " : "",
1834 cap & (1 << 13) ? "part " : ""
1838 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1840 static int printed_version;
1841 struct ata_port_info pi = ahci_port_info[ent->driver_data];
1842 const struct ata_port_info *ppi[] = { &pi, NULL };
1843 struct device *dev = &pdev->dev;
1844 struct ahci_host_priv *hpriv;
1845 struct ata_host *host;
1850 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1852 if (!printed_version++)
1853 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1855 /* acquire resources */
1856 rc = pcim_enable_device(pdev);
1860 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1862 pcim_pin_device(pdev);
1866 if ((pi.flags & AHCI_FLAG_NO_MSI) || pci_enable_msi(pdev))
1869 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1873 /* save initial config */
1874 ahci_save_initial_config(pdev, &pi, hpriv);
1877 if (hpriv->cap & HOST_CAP_NCQ)
1878 pi.flags |= ATA_FLAG_NCQ;
1880 host = ata_host_alloc_pinfo(&pdev->dev, ppi, fls(hpriv->port_map));
1883 host->iomap = pcim_iomap_table(pdev);
1884 host->private_data = hpriv;
1886 for (i = 0; i < host->n_ports; i++) {
1887 struct ata_port *ap = host->ports[i];
1888 void __iomem *port_mmio = ahci_port_base(ap);
1890 ata_port_pbar_desc(ap, AHCI_PCI_BAR, -1, "abar");
1891 ata_port_pbar_desc(ap, AHCI_PCI_BAR,
1892 0x100 + ap->port_no * 0x80, "port");
1894 /* standard SATA port setup */
1895 if (hpriv->port_map & (1 << i))
1896 ap->ioaddr.cmd_addr = port_mmio;
1898 /* disabled/not-implemented port */
1900 ap->ops = &ata_dummy_port_ops;
1903 /* initialize adapter */
1904 rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
1908 rc = ahci_reset_controller(host);
1912 ahci_init_controller(host);
1913 ahci_print_info(host);
1915 pci_set_master(pdev);
1916 return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
1920 static int __init ahci_init(void)
1922 return pci_register_driver(&ahci_pci_driver);
1925 static void __exit ahci_exit(void)
1927 pci_unregister_driver(&ahci_pci_driver);
1931 MODULE_AUTHOR("Jeff Garzik");
1932 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1933 MODULE_LICENSE("GPL");
1934 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1935 MODULE_VERSION(DRV_VERSION);
1937 module_init(ahci_init);
1938 module_exit(ahci_exit);