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 "2.0"
55 AHCI_MAX_SG = 168, /* hardware max is 64K */
56 AHCI_DMA_BOUNDARY = 0xffffffff,
57 AHCI_USE_CLUSTERING = 0,
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,
84 /* global controller registers */
85 HOST_CAP = 0x00, /* host capabilities */
86 HOST_CTL = 0x04, /* global host control */
87 HOST_IRQ_STAT = 0x08, /* interrupt status */
88 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
89 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
92 HOST_RESET = (1 << 0), /* reset controller; self-clear */
93 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
94 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
97 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
98 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
99 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
100 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
101 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
103 /* registers for each SATA port */
104 PORT_LST_ADDR = 0x00, /* command list DMA addr */
105 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
106 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
107 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
108 PORT_IRQ_STAT = 0x10, /* interrupt status */
109 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
110 PORT_CMD = 0x18, /* port command */
111 PORT_TFDATA = 0x20, /* taskfile data */
112 PORT_SIG = 0x24, /* device TF signature */
113 PORT_CMD_ISSUE = 0x38, /* command issue */
114 PORT_SCR = 0x28, /* SATA phy register block */
115 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
116 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
117 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
118 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
120 /* PORT_IRQ_{STAT,MASK} bits */
121 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
122 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
123 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
124 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
125 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
126 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
127 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
128 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
130 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
131 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
132 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
133 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
134 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
135 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
136 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
137 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
138 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
140 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
145 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
147 PORT_IRQ_HBUS_DATA_ERR,
148 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
149 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
150 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
153 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
154 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
155 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
156 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
157 PORT_CMD_CLO = (1 << 3), /* Command list override */
158 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
159 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
160 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
162 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
163 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
164 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
165 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
168 AHCI_FLAG_NO_NCQ = (1 << 24),
169 AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */
170 AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */
173 struct ahci_cmd_hdr {
188 struct ahci_host_priv {
189 u32 cap; /* cache of HOST_CAP register */
190 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
193 struct ahci_port_priv {
194 struct ahci_cmd_hdr *cmd_slot;
195 dma_addr_t cmd_slot_dma;
197 dma_addr_t cmd_tbl_dma;
199 dma_addr_t rx_fis_dma;
200 /* for NCQ spurious interrupt analysis */
201 int ncq_saw_spurious_sdb_cnt;
202 unsigned int ncq_saw_d2h:1;
203 unsigned int ncq_saw_dmas:1;
206 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
207 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
208 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
209 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
210 static irqreturn_t ahci_interrupt (int irq, void *dev_instance);
211 static void ahci_irq_clear(struct ata_port *ap);
212 static int ahci_port_start(struct ata_port *ap);
213 static void ahci_port_stop(struct ata_port *ap);
214 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
215 static void ahci_qc_prep(struct ata_queued_cmd *qc);
216 static u8 ahci_check_status(struct ata_port *ap);
217 static void ahci_freeze(struct ata_port *ap);
218 static void ahci_thaw(struct ata_port *ap);
219 static void ahci_error_handler(struct ata_port *ap);
220 static void ahci_vt8251_error_handler(struct ata_port *ap);
221 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
222 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
223 static int ahci_port_resume(struct ata_port *ap);
224 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
225 static int ahci_pci_device_resume(struct pci_dev *pdev);
227 static struct scsi_host_template ahci_sht = {
228 .module = THIS_MODULE,
230 .ioctl = ata_scsi_ioctl,
231 .queuecommand = ata_scsi_queuecmd,
232 .change_queue_depth = ata_scsi_change_queue_depth,
233 .can_queue = AHCI_MAX_CMDS - 1,
234 .this_id = ATA_SHT_THIS_ID,
235 .sg_tablesize = AHCI_MAX_SG,
236 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
237 .emulated = ATA_SHT_EMULATED,
238 .use_clustering = AHCI_USE_CLUSTERING,
239 .proc_name = DRV_NAME,
240 .dma_boundary = AHCI_DMA_BOUNDARY,
241 .slave_configure = ata_scsi_slave_config,
242 .slave_destroy = ata_scsi_slave_destroy,
243 .bios_param = ata_std_bios_param,
244 .suspend = ata_scsi_device_suspend,
245 .resume = ata_scsi_device_resume,
248 static const struct ata_port_operations ahci_ops = {
249 .port_disable = ata_port_disable,
251 .check_status = ahci_check_status,
252 .check_altstatus = ahci_check_status,
253 .dev_select = ata_noop_dev_select,
255 .tf_read = ahci_tf_read,
257 .qc_prep = ahci_qc_prep,
258 .qc_issue = ahci_qc_issue,
260 .irq_handler = ahci_interrupt,
261 .irq_clear = ahci_irq_clear,
262 .irq_on = ata_dummy_irq_on,
263 .irq_ack = ata_dummy_irq_ack,
265 .scr_read = ahci_scr_read,
266 .scr_write = ahci_scr_write,
268 .freeze = ahci_freeze,
271 .error_handler = ahci_error_handler,
272 .post_internal_cmd = ahci_post_internal_cmd,
274 .port_suspend = ahci_port_suspend,
275 .port_resume = ahci_port_resume,
277 .port_start = ahci_port_start,
278 .port_stop = ahci_port_stop,
281 static const struct ata_port_operations ahci_vt8251_ops = {
282 .port_disable = ata_port_disable,
284 .check_status = ahci_check_status,
285 .check_altstatus = ahci_check_status,
286 .dev_select = ata_noop_dev_select,
288 .tf_read = ahci_tf_read,
290 .qc_prep = ahci_qc_prep,
291 .qc_issue = ahci_qc_issue,
293 .irq_handler = ahci_interrupt,
294 .irq_clear = ahci_irq_clear,
295 .irq_on = ata_dummy_irq_on,
296 .irq_ack = ata_dummy_irq_ack,
298 .scr_read = ahci_scr_read,
299 .scr_write = ahci_scr_write,
301 .freeze = ahci_freeze,
304 .error_handler = ahci_vt8251_error_handler,
305 .post_internal_cmd = ahci_post_internal_cmd,
307 .port_suspend = ahci_port_suspend,
308 .port_resume = ahci_port_resume,
310 .port_start = ahci_port_start,
311 .port_stop = ahci_port_stop,
314 static const struct ata_port_info ahci_port_info[] = {
318 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
319 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
320 ATA_FLAG_SKIP_D2H_BSY,
321 .pio_mask = 0x1f, /* pio0-4 */
322 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
323 .port_ops = &ahci_ops,
328 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
329 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
330 ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_HONOR_PI,
331 .pio_mask = 0x1f, /* pio0-4 */
332 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
333 .port_ops = &ahci_ops,
335 /* board_ahci_vt8251 */
338 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
339 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
340 ATA_FLAG_SKIP_D2H_BSY |
341 ATA_FLAG_HRST_TO_RESUME | AHCI_FLAG_NO_NCQ,
342 .pio_mask = 0x1f, /* pio0-4 */
343 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
344 .port_ops = &ahci_vt8251_ops,
346 /* board_ahci_ign_iferr */
349 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
350 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
351 ATA_FLAG_SKIP_D2H_BSY |
352 AHCI_FLAG_IGN_IRQ_IF_ERR,
353 .pio_mask = 0x1f, /* pio0-4 */
354 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
355 .port_ops = &ahci_ops,
359 static const struct pci_device_id ahci_pci_tbl[] = {
361 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
362 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
363 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
364 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
365 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
366 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
367 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
368 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
369 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
370 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
371 { PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */
372 { PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */
373 { PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */
374 { PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */
375 { PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */
376 { PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */
377 { PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */
378 { PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */
379 { PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */
380 { PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */
381 { PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */
382 { PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */
383 { PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */
384 { PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */
385 { PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */
386 { PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */
389 { PCI_VDEVICE(JMICRON, 0x2360), board_ahci_ign_iferr }, /* JMB360 */
390 { PCI_VDEVICE(JMICRON, 0x2361), board_ahci_ign_iferr }, /* JMB361 */
391 { PCI_VDEVICE(JMICRON, 0x2363), board_ahci_ign_iferr }, /* JMB363 */
392 { PCI_VDEVICE(JMICRON, 0x2365), board_ahci_ign_iferr }, /* JMB365 */
393 { PCI_VDEVICE(JMICRON, 0x2366), board_ahci_ign_iferr }, /* JMB366 */
396 { PCI_VDEVICE(ATI, 0x4380), board_ahci }, /* ATI SB600 non-raid */
397 { PCI_VDEVICE(ATI, 0x4381), board_ahci }, /* ATI SB600 raid */
400 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
403 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
404 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
405 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
406 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
407 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
408 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
409 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
410 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
411 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
412 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
413 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
414 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
415 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
416 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
417 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
418 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
419 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
420 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
421 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
422 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
425 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
426 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
427 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
429 /* Generic, PCI class code for AHCI */
430 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
431 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
433 { } /* terminate list */
437 static struct pci_driver ahci_pci_driver = {
439 .id_table = ahci_pci_tbl,
440 .probe = ahci_init_one,
441 .remove = ata_pci_remove_one,
442 .suspend = ahci_pci_device_suspend,
443 .resume = ahci_pci_device_resume,
447 static inline int ahci_nr_ports(u32 cap)
449 return (cap & 0x1f) + 1;
452 static inline void __iomem *ahci_port_base(void __iomem *base,
455 return base + 0x100 + (port * 0x80);
458 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
463 case SCR_STATUS: sc_reg = 0; break;
464 case SCR_CONTROL: sc_reg = 1; break;
465 case SCR_ERROR: sc_reg = 2; break;
466 case SCR_ACTIVE: sc_reg = 3; break;
471 return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
475 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
481 case SCR_STATUS: sc_reg = 0; break;
482 case SCR_CONTROL: sc_reg = 1; break;
483 case SCR_ERROR: sc_reg = 2; break;
484 case SCR_ACTIVE: sc_reg = 3; break;
489 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
492 static void ahci_start_engine(void __iomem *port_mmio)
497 tmp = readl(port_mmio + PORT_CMD);
498 tmp |= PORT_CMD_START;
499 writel(tmp, port_mmio + PORT_CMD);
500 readl(port_mmio + PORT_CMD); /* flush */
503 static int ahci_stop_engine(void __iomem *port_mmio)
507 tmp = readl(port_mmio + PORT_CMD);
509 /* check if the HBA is idle */
510 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
513 /* setting HBA to idle */
514 tmp &= ~PORT_CMD_START;
515 writel(tmp, port_mmio + PORT_CMD);
517 /* wait for engine to stop. This could be as long as 500 msec */
518 tmp = ata_wait_register(port_mmio + PORT_CMD,
519 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
520 if (tmp & PORT_CMD_LIST_ON)
526 static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap,
527 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
531 /* set FIS registers */
532 if (cap & HOST_CAP_64)
533 writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
534 writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
536 if (cap & HOST_CAP_64)
537 writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
538 writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
540 /* enable FIS reception */
541 tmp = readl(port_mmio + PORT_CMD);
542 tmp |= PORT_CMD_FIS_RX;
543 writel(tmp, port_mmio + PORT_CMD);
546 readl(port_mmio + PORT_CMD);
549 static int ahci_stop_fis_rx(void __iomem *port_mmio)
553 /* disable FIS reception */
554 tmp = readl(port_mmio + PORT_CMD);
555 tmp &= ~PORT_CMD_FIS_RX;
556 writel(tmp, port_mmio + PORT_CMD);
558 /* wait for completion, spec says 500ms, give it 1000 */
559 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
560 PORT_CMD_FIS_ON, 10, 1000);
561 if (tmp & PORT_CMD_FIS_ON)
567 static void ahci_power_up(void __iomem *port_mmio, u32 cap)
571 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
574 if (cap & HOST_CAP_SSS) {
575 cmd |= PORT_CMD_SPIN_UP;
576 writel(cmd, port_mmio + PORT_CMD);
580 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
583 static void ahci_power_down(void __iomem *port_mmio, u32 cap)
587 if (!(cap & HOST_CAP_SSS))
590 /* put device into listen mode, first set PxSCTL.DET to 0 */
591 scontrol = readl(port_mmio + PORT_SCR_CTL);
593 writel(scontrol, port_mmio + PORT_SCR_CTL);
595 /* then set PxCMD.SUD to 0 */
596 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
597 cmd &= ~PORT_CMD_SPIN_UP;
598 writel(cmd, port_mmio + PORT_CMD);
601 static void ahci_init_port(void __iomem *port_mmio, u32 cap,
602 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
604 /* enable FIS reception */
605 ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma);
608 ahci_start_engine(port_mmio);
611 static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg)
616 rc = ahci_stop_engine(port_mmio);
618 *emsg = "failed to stop engine";
622 /* disable FIS reception */
623 rc = ahci_stop_fis_rx(port_mmio);
625 *emsg = "failed stop FIS RX";
632 static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev)
634 u32 cap_save, impl_save, tmp;
636 cap_save = readl(mmio + HOST_CAP);
637 impl_save = readl(mmio + HOST_PORTS_IMPL);
639 /* global controller reset */
640 tmp = readl(mmio + HOST_CTL);
641 if ((tmp & HOST_RESET) == 0) {
642 writel(tmp | HOST_RESET, mmio + HOST_CTL);
643 readl(mmio + HOST_CTL); /* flush */
646 /* reset must complete within 1 second, or
647 * the hardware should be considered fried.
651 tmp = readl(mmio + HOST_CTL);
652 if (tmp & HOST_RESET) {
653 dev_printk(KERN_ERR, &pdev->dev,
654 "controller reset failed (0x%x)\n", tmp);
658 /* turn on AHCI mode */
659 writel(HOST_AHCI_EN, mmio + HOST_CTL);
660 (void) readl(mmio + HOST_CTL); /* flush */
662 /* These write-once registers are normally cleared on reset.
663 * Restore BIOS values... which we HOPE were present before
667 impl_save = (1 << ahci_nr_ports(cap_save)) - 1;
668 dev_printk(KERN_WARNING, &pdev->dev,
669 "PORTS_IMPL is zero, forcing 0x%x\n", impl_save);
671 writel(cap_save, mmio + HOST_CAP);
672 writel(impl_save, mmio + HOST_PORTS_IMPL);
673 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
675 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
679 pci_read_config_word(pdev, 0x92, &tmp16);
681 pci_write_config_word(pdev, 0x92, tmp16);
687 static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
688 int n_ports, unsigned int port_flags,
689 struct ahci_host_priv *hpriv)
694 for (i = 0; i < n_ports; i++) {
695 void __iomem *port_mmio = ahci_port_base(mmio, i);
696 const char *emsg = NULL;
698 if ((port_flags & AHCI_FLAG_HONOR_PI) &&
699 !(hpriv->port_map & (1 << i)))
702 /* make sure port is not active */
703 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
705 dev_printk(KERN_WARNING, &pdev->dev,
706 "%s (%d)\n", emsg, rc);
709 tmp = readl(port_mmio + PORT_SCR_ERR);
710 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
711 writel(tmp, port_mmio + PORT_SCR_ERR);
714 tmp = readl(port_mmio + PORT_IRQ_STAT);
715 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
717 writel(tmp, port_mmio + PORT_IRQ_STAT);
719 writel(1 << i, mmio + HOST_IRQ_STAT);
722 tmp = readl(mmio + HOST_CTL);
723 VPRINTK("HOST_CTL 0x%x\n", tmp);
724 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
725 tmp = readl(mmio + HOST_CTL);
726 VPRINTK("HOST_CTL 0x%x\n", tmp);
729 static unsigned int ahci_dev_classify(struct ata_port *ap)
731 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
732 struct ata_taskfile tf;
735 tmp = readl(port_mmio + PORT_SIG);
736 tf.lbah = (tmp >> 24) & 0xff;
737 tf.lbam = (tmp >> 16) & 0xff;
738 tf.lbal = (tmp >> 8) & 0xff;
739 tf.nsect = (tmp) & 0xff;
741 return ata_dev_classify(&tf);
744 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
747 dma_addr_t cmd_tbl_dma;
749 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
751 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
752 pp->cmd_slot[tag].status = 0;
753 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
754 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
757 static int ahci_clo(struct ata_port *ap)
759 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
760 struct ahci_host_priv *hpriv = ap->host->private_data;
763 if (!(hpriv->cap & HOST_CAP_CLO))
766 tmp = readl(port_mmio + PORT_CMD);
768 writel(tmp, port_mmio + PORT_CMD);
770 tmp = ata_wait_register(port_mmio + PORT_CMD,
771 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
772 if (tmp & PORT_CMD_CLO)
778 static int ahci_softreset(struct ata_port *ap, unsigned int *class)
780 struct ahci_port_priv *pp = ap->private_data;
781 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
782 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
783 const u32 cmd_fis_len = 5; /* five dwords */
784 const char *reason = NULL;
785 struct ata_taskfile tf;
792 if (ata_port_offline(ap)) {
793 DPRINTK("PHY reports no device\n");
794 *class = ATA_DEV_NONE;
798 /* prepare for SRST (AHCI-1.1 10.4.1) */
799 rc = ahci_stop_engine(port_mmio);
801 reason = "failed to stop engine";
805 /* check BUSY/DRQ, perform Command List Override if necessary */
806 if (ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ)) {
809 if (rc == -EOPNOTSUPP) {
810 reason = "port busy but CLO unavailable";
813 reason = "port busy but CLO failed";
819 ahci_start_engine(port_mmio);
821 ata_tf_init(ap->device, &tf);
824 /* issue the first D2H Register FIS */
825 ahci_fill_cmd_slot(pp, 0,
826 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
829 ata_tf_to_fis(&tf, fis, 0);
830 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
832 writel(1, port_mmio + PORT_CMD_ISSUE);
834 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
837 reason = "1st FIS failed";
841 /* spec says at least 5us, but be generous and sleep for 1ms */
844 /* issue the second D2H Register FIS */
845 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
848 ata_tf_to_fis(&tf, fis, 0);
849 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
851 writel(1, port_mmio + PORT_CMD_ISSUE);
852 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
854 /* spec mandates ">= 2ms" before checking status.
855 * We wait 150ms, because that was the magic delay used for
856 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
857 * between when the ATA command register is written, and then
858 * status is checked. Because waiting for "a while" before
859 * checking status is fine, post SRST, we perform this magic
860 * delay here as well.
864 *class = ATA_DEV_NONE;
865 if (ata_port_online(ap)) {
866 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
868 reason = "device not ready";
871 *class = ahci_dev_classify(ap);
874 DPRINTK("EXIT, class=%u\n", *class);
878 ahci_start_engine(port_mmio);
880 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
884 static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
886 struct ahci_port_priv *pp = ap->private_data;
887 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
888 struct ata_taskfile tf;
889 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
890 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
895 ahci_stop_engine(port_mmio);
897 /* clear D2H reception area to properly wait for D2H FIS */
898 ata_tf_init(ap->device, &tf);
900 ata_tf_to_fis(&tf, d2h_fis, 0);
902 rc = sata_std_hardreset(ap, class);
904 ahci_start_engine(port_mmio);
906 if (rc == 0 && ata_port_online(ap))
907 *class = ahci_dev_classify(ap);
908 if (*class == ATA_DEV_UNKNOWN)
909 *class = ATA_DEV_NONE;
911 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
915 static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class)
917 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
918 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
923 ahci_stop_engine(port_mmio);
925 rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context));
927 /* vt8251 needs SError cleared for the port to operate */
928 ahci_scr_write(ap, SCR_ERROR, ahci_scr_read(ap, SCR_ERROR));
930 ahci_start_engine(port_mmio);
932 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
934 /* vt8251 doesn't clear BSY on signature FIS reception,
935 * request follow-up softreset.
937 return rc ?: -EAGAIN;
940 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
942 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
945 ata_std_postreset(ap, class);
947 /* Make sure port's ATAPI bit is set appropriately */
948 new_tmp = tmp = readl(port_mmio + PORT_CMD);
949 if (*class == ATA_DEV_ATAPI)
950 new_tmp |= PORT_CMD_ATAPI;
952 new_tmp &= ~PORT_CMD_ATAPI;
953 if (new_tmp != tmp) {
954 writel(new_tmp, port_mmio + PORT_CMD);
955 readl(port_mmio + PORT_CMD); /* flush */
959 static u8 ahci_check_status(struct ata_port *ap)
961 void __iomem *mmio = ap->ioaddr.cmd_addr;
963 return readl(mmio + PORT_TFDATA) & 0xFF;
966 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
968 struct ahci_port_priv *pp = ap->private_data;
969 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
971 ata_tf_from_fis(d2h_fis, tf);
974 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
976 struct scatterlist *sg;
977 struct ahci_sg *ahci_sg;
978 unsigned int n_sg = 0;
983 * Next, the S/G list.
985 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
986 ata_for_each_sg(sg, qc) {
987 dma_addr_t addr = sg_dma_address(sg);
988 u32 sg_len = sg_dma_len(sg);
990 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
991 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
992 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
1001 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1003 struct ata_port *ap = qc->ap;
1004 struct ahci_port_priv *pp = ap->private_data;
1005 int is_atapi = is_atapi_taskfile(&qc->tf);
1008 const u32 cmd_fis_len = 5; /* five dwords */
1009 unsigned int n_elem;
1012 * Fill in command table information. First, the header,
1013 * a SATA Register - Host to Device command FIS.
1015 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1017 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
1019 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1020 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1024 if (qc->flags & ATA_QCFLAG_DMAMAP)
1025 n_elem = ahci_fill_sg(qc, cmd_tbl);
1028 * Fill in command slot information.
1030 opts = cmd_fis_len | n_elem << 16;
1031 if (qc->tf.flags & ATA_TFLAG_WRITE)
1032 opts |= AHCI_CMD_WRITE;
1034 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1036 ahci_fill_cmd_slot(pp, qc->tag, opts);
1039 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1041 struct ahci_port_priv *pp = ap->private_data;
1042 struct ata_eh_info *ehi = &ap->eh_info;
1043 unsigned int err_mask = 0, action = 0;
1044 struct ata_queued_cmd *qc;
1047 ata_ehi_clear_desc(ehi);
1049 /* AHCI needs SError cleared; otherwise, it might lock up */
1050 serror = ahci_scr_read(ap, SCR_ERROR);
1051 ahci_scr_write(ap, SCR_ERROR, serror);
1053 /* analyze @irq_stat */
1054 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1056 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1057 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1058 irq_stat &= ~PORT_IRQ_IF_ERR;
1060 if (irq_stat & PORT_IRQ_TF_ERR)
1061 err_mask |= AC_ERR_DEV;
1063 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1064 err_mask |= AC_ERR_HOST_BUS;
1065 action |= ATA_EH_SOFTRESET;
1068 if (irq_stat & PORT_IRQ_IF_ERR) {
1069 err_mask |= AC_ERR_ATA_BUS;
1070 action |= ATA_EH_SOFTRESET;
1071 ata_ehi_push_desc(ehi, ", interface fatal error");
1074 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1075 ata_ehi_hotplugged(ehi);
1076 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
1077 "connection status changed" : "PHY RDY changed");
1080 if (irq_stat & PORT_IRQ_UNK_FIS) {
1081 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1083 err_mask |= AC_ERR_HSM;
1084 action |= ATA_EH_SOFTRESET;
1085 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
1086 unk[0], unk[1], unk[2], unk[3]);
1089 /* okay, let's hand over to EH */
1090 ehi->serror |= serror;
1091 ehi->action |= action;
1093 qc = ata_qc_from_tag(ap, ap->active_tag);
1095 qc->err_mask |= err_mask;
1097 ehi->err_mask |= err_mask;
1099 if (irq_stat & PORT_IRQ_FREEZE)
1100 ata_port_freeze(ap);
1105 static void ahci_host_intr(struct ata_port *ap)
1107 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1108 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1109 struct ata_eh_info *ehi = &ap->eh_info;
1110 struct ahci_port_priv *pp = ap->private_data;
1111 u32 status, qc_active;
1112 int rc, known_irq = 0;
1114 status = readl(port_mmio + PORT_IRQ_STAT);
1115 writel(status, port_mmio + PORT_IRQ_STAT);
1117 if (unlikely(status & PORT_IRQ_ERROR)) {
1118 ahci_error_intr(ap, status);
1123 qc_active = readl(port_mmio + PORT_SCR_ACT);
1125 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1127 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1131 ehi->err_mask |= AC_ERR_HSM;
1132 ehi->action |= ATA_EH_SOFTRESET;
1133 ata_port_freeze(ap);
1137 /* hmmm... a spurious interupt */
1139 /* if !NCQ, ignore. No modern ATA device has broken HSM
1140 * implementation for non-NCQ commands.
1145 if (status & PORT_IRQ_D2H_REG_FIS) {
1146 if (!pp->ncq_saw_d2h)
1147 ata_port_printk(ap, KERN_INFO,
1148 "D2H reg with I during NCQ, "
1149 "this message won't be printed again\n");
1150 pp->ncq_saw_d2h = 1;
1154 if (status & PORT_IRQ_DMAS_FIS) {
1155 if (!pp->ncq_saw_dmas)
1156 ata_port_printk(ap, KERN_INFO,
1157 "DMAS FIS during NCQ, "
1158 "this message won't be printed again\n");
1159 pp->ncq_saw_dmas = 1;
1163 if (status & PORT_IRQ_SDB_FIS &&
1164 pp->ncq_saw_spurious_sdb_cnt < 10) {
1165 /* SDB FIS containing spurious completions might be
1166 * dangerous, we need to know more about them. Print
1169 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1171 ata_port_printk(ap, KERN_INFO, "Spurious SDB FIS during NCQ "
1172 "issue=0x%x SAct=0x%x FIS=%08x:%08x%s\n",
1173 readl(port_mmio + PORT_CMD_ISSUE),
1174 readl(port_mmio + PORT_SCR_ACT),
1175 le32_to_cpu(f[0]), le32_to_cpu(f[1]),
1176 pp->ncq_saw_spurious_sdb_cnt < 10 ?
1177 "" : ", shutting up");
1179 pp->ncq_saw_spurious_sdb_cnt++;
1184 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1185 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1186 status, ap->active_tag, ap->sactive);
1189 static void ahci_irq_clear(struct ata_port *ap)
1194 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1196 struct ata_host *host = dev_instance;
1197 struct ahci_host_priv *hpriv;
1198 unsigned int i, handled = 0;
1200 u32 irq_stat, irq_ack = 0;
1204 hpriv = host->private_data;
1205 mmio = host->iomap[AHCI_PCI_BAR];
1207 /* sigh. 0xffffffff is a valid return from h/w */
1208 irq_stat = readl(mmio + HOST_IRQ_STAT);
1209 irq_stat &= hpriv->port_map;
1213 spin_lock(&host->lock);
1215 for (i = 0; i < host->n_ports; i++) {
1216 struct ata_port *ap;
1218 if (!(irq_stat & (1 << i)))
1221 ap = host->ports[i];
1224 VPRINTK("port %u\n", i);
1226 VPRINTK("port %u (no irq)\n", i);
1227 if (ata_ratelimit())
1228 dev_printk(KERN_WARNING, host->dev,
1229 "interrupt on disabled port %u\n", i);
1232 irq_ack |= (1 << i);
1236 writel(irq_ack, mmio + HOST_IRQ_STAT);
1240 spin_unlock(&host->lock);
1244 return IRQ_RETVAL(handled);
1247 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1249 struct ata_port *ap = qc->ap;
1250 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1252 if (qc->tf.protocol == ATA_PROT_NCQ)
1253 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1254 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1255 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1260 static void ahci_freeze(struct ata_port *ap)
1262 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1263 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1266 writel(0, port_mmio + PORT_IRQ_MASK);
1269 static void ahci_thaw(struct ata_port *ap)
1271 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1272 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1276 tmp = readl(port_mmio + PORT_IRQ_STAT);
1277 writel(tmp, port_mmio + PORT_IRQ_STAT);
1278 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1280 /* turn IRQ back on */
1281 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1284 static void ahci_error_handler(struct ata_port *ap)
1286 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1287 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1289 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1290 /* restart engine */
1291 ahci_stop_engine(port_mmio);
1292 ahci_start_engine(port_mmio);
1295 /* perform recovery */
1296 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
1300 static void ahci_vt8251_error_handler(struct ata_port *ap)
1302 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1303 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1305 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1306 /* restart engine */
1307 ahci_stop_engine(port_mmio);
1308 ahci_start_engine(port_mmio);
1311 /* perform recovery */
1312 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1316 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1318 struct ata_port *ap = qc->ap;
1319 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1320 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1322 if (qc->flags & ATA_QCFLAG_FAILED)
1323 qc->err_mask |= AC_ERR_OTHER;
1326 /* make DMA engine forget about the failed command */
1327 ahci_stop_engine(port_mmio);
1328 ahci_start_engine(port_mmio);
1332 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1334 struct ahci_host_priv *hpriv = ap->host->private_data;
1335 struct ahci_port_priv *pp = ap->private_data;
1336 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1337 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1338 const char *emsg = NULL;
1341 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1343 ahci_power_down(port_mmio, hpriv->cap);
1345 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1346 ahci_init_port(port_mmio, hpriv->cap,
1347 pp->cmd_slot_dma, pp->rx_fis_dma);
1353 static int ahci_port_resume(struct ata_port *ap)
1355 struct ahci_port_priv *pp = ap->private_data;
1356 struct ahci_host_priv *hpriv = ap->host->private_data;
1357 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1358 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1360 ahci_power_up(port_mmio, hpriv->cap);
1361 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1366 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1368 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1369 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1372 if (mesg.event == PM_EVENT_SUSPEND) {
1373 /* AHCI spec rev1.1 section 8.3.3:
1374 * Software must disable interrupts prior to requesting a
1375 * transition of the HBA to D3 state.
1377 ctl = readl(mmio + HOST_CTL);
1378 ctl &= ~HOST_IRQ_EN;
1379 writel(ctl, mmio + HOST_CTL);
1380 readl(mmio + HOST_CTL); /* flush */
1383 return ata_pci_device_suspend(pdev, mesg);
1386 static int ahci_pci_device_resume(struct pci_dev *pdev)
1388 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1389 struct ahci_host_priv *hpriv = host->private_data;
1390 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1393 rc = ata_pci_device_do_resume(pdev);
1397 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1398 rc = ahci_reset_controller(mmio, pdev);
1402 ahci_init_controller(mmio, pdev, host->n_ports,
1403 host->ports[0]->flags, hpriv);
1406 ata_host_resume(host);
1411 static int ahci_port_start(struct ata_port *ap)
1413 struct device *dev = ap->host->dev;
1414 struct ahci_host_priv *hpriv = ap->host->private_data;
1415 struct ahci_port_priv *pp;
1416 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1417 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1422 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1426 rc = ata_pad_alloc(ap, dev);
1430 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1434 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1437 * First item in chunk of DMA memory: 32-slot command table,
1438 * 32 bytes each in size
1441 pp->cmd_slot_dma = mem_dma;
1443 mem += AHCI_CMD_SLOT_SZ;
1444 mem_dma += AHCI_CMD_SLOT_SZ;
1447 * Second item: Received-FIS area
1450 pp->rx_fis_dma = mem_dma;
1452 mem += AHCI_RX_FIS_SZ;
1453 mem_dma += AHCI_RX_FIS_SZ;
1456 * Third item: data area for storing a single command
1457 * and its scatter-gather table
1460 pp->cmd_tbl_dma = mem_dma;
1462 ap->private_data = pp;
1465 ahci_power_up(port_mmio, hpriv->cap);
1467 /* initialize port */
1468 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1473 static void ahci_port_stop(struct ata_port *ap)
1475 struct ahci_host_priv *hpriv = ap->host->private_data;
1476 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1477 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1478 const char *emsg = NULL;
1481 /* de-initialize port */
1482 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1484 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1487 static void ahci_setup_port(struct ata_ioports *port, void __iomem *base,
1488 unsigned int port_idx)
1490 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
1491 base = ahci_port_base(base, port_idx);
1492 VPRINTK("base now==0x%lx\n", base);
1494 port->cmd_addr = base;
1495 port->scr_addr = base + PORT_SCR;
1500 static int ahci_host_init(struct ata_probe_ent *probe_ent)
1502 struct ahci_host_priv *hpriv = probe_ent->private_data;
1503 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1504 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
1505 unsigned int i, cap_n_ports, using_dac;
1508 rc = ahci_reset_controller(mmio, pdev);
1512 hpriv->cap = readl(mmio + HOST_CAP);
1513 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
1514 cap_n_ports = ahci_nr_ports(hpriv->cap);
1516 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1517 hpriv->cap, hpriv->port_map, cap_n_ports);
1519 if (probe_ent->port_flags & AHCI_FLAG_HONOR_PI) {
1520 unsigned int n_ports = cap_n_ports;
1521 u32 port_map = hpriv->port_map;
1524 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
1525 if (port_map & (1 << i)) {
1527 port_map &= ~(1 << i);
1530 probe_ent->dummy_port_mask |= 1 << i;
1533 if (n_ports || port_map)
1534 dev_printk(KERN_WARNING, &pdev->dev,
1535 "nr_ports (%u) and implemented port map "
1536 "(0x%x) don't match\n",
1537 cap_n_ports, hpriv->port_map);
1539 probe_ent->n_ports = max_port + 1;
1541 probe_ent->n_ports = cap_n_ports;
1543 using_dac = hpriv->cap & HOST_CAP_64;
1545 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1546 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1548 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1550 dev_printk(KERN_ERR, &pdev->dev,
1551 "64-bit DMA enable failed\n");
1556 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1558 dev_printk(KERN_ERR, &pdev->dev,
1559 "32-bit DMA enable failed\n");
1562 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1564 dev_printk(KERN_ERR, &pdev->dev,
1565 "32-bit consistent DMA enable failed\n");
1570 for (i = 0; i < probe_ent->n_ports; i++)
1571 ahci_setup_port(&probe_ent->port[i], mmio, i);
1573 ahci_init_controller(mmio, pdev, probe_ent->n_ports,
1574 probe_ent->port_flags, hpriv);
1576 pci_set_master(pdev);
1581 static void ahci_print_info(struct ata_probe_ent *probe_ent)
1583 struct ahci_host_priv *hpriv = probe_ent->private_data;
1584 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1585 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
1586 u32 vers, cap, impl, speed;
1587 const char *speed_s;
1591 vers = readl(mmio + HOST_VERSION);
1593 impl = hpriv->port_map;
1595 speed = (cap >> 20) & 0xf;
1598 else if (speed == 2)
1603 pci_read_config_word(pdev, 0x0a, &cc);
1604 if (cc == PCI_CLASS_STORAGE_IDE)
1606 else if (cc == PCI_CLASS_STORAGE_SATA)
1608 else if (cc == PCI_CLASS_STORAGE_RAID)
1613 dev_printk(KERN_INFO, &pdev->dev,
1614 "AHCI %02x%02x.%02x%02x "
1615 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1618 (vers >> 24) & 0xff,
1619 (vers >> 16) & 0xff,
1623 ((cap >> 8) & 0x1f) + 1,
1629 dev_printk(KERN_INFO, &pdev->dev,
1635 cap & (1 << 31) ? "64bit " : "",
1636 cap & (1 << 30) ? "ncq " : "",
1637 cap & (1 << 28) ? "ilck " : "",
1638 cap & (1 << 27) ? "stag " : "",
1639 cap & (1 << 26) ? "pm " : "",
1640 cap & (1 << 25) ? "led " : "",
1642 cap & (1 << 24) ? "clo " : "",
1643 cap & (1 << 19) ? "nz " : "",
1644 cap & (1 << 18) ? "only " : "",
1645 cap & (1 << 17) ? "pmp " : "",
1646 cap & (1 << 15) ? "pio " : "",
1647 cap & (1 << 14) ? "slum " : "",
1648 cap & (1 << 13) ? "part " : ""
1652 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1654 static int printed_version;
1655 unsigned int board_idx = (unsigned int) ent->driver_data;
1656 struct device *dev = &pdev->dev;
1657 struct ata_probe_ent *probe_ent;
1658 struct ahci_host_priv *hpriv;
1663 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1665 if (!printed_version++)
1666 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1668 if (pdev->vendor == PCI_VENDOR_ID_JMICRON) {
1669 /* Function 1 is the PATA controller except on the 368, where
1670 we are not AHCI anyway */
1671 if (PCI_FUNC(pdev->devfn))
1675 rc = pcim_enable_device(pdev);
1679 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1681 pcim_pin_device(pdev);
1685 if (pci_enable_msi(pdev))
1688 probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
1689 if (probe_ent == NULL)
1692 probe_ent->dev = pci_dev_to_dev(pdev);
1693 INIT_LIST_HEAD(&probe_ent->node);
1695 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1699 probe_ent->sht = ahci_port_info[board_idx].sht;
1700 probe_ent->port_flags = ahci_port_info[board_idx].flags;
1701 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1702 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1703 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1705 probe_ent->irq = pdev->irq;
1706 probe_ent->irq_flags = IRQF_SHARED;
1707 probe_ent->iomap = pcim_iomap_table(pdev);
1708 probe_ent->private_data = hpriv;
1710 /* initialize adapter */
1711 rc = ahci_host_init(probe_ent);
1715 if (!(probe_ent->port_flags & AHCI_FLAG_NO_NCQ) &&
1716 (hpriv->cap & HOST_CAP_NCQ))
1717 probe_ent->port_flags |= ATA_FLAG_NCQ;
1719 ahci_print_info(probe_ent);
1721 if (!ata_device_add(probe_ent))
1724 devm_kfree(dev, probe_ent);
1728 static int __init ahci_init(void)
1730 return pci_register_driver(&ahci_pci_driver);
1733 static void __exit ahci_exit(void)
1735 pci_unregister_driver(&ahci_pci_driver);
1739 MODULE_AUTHOR("Jeff Garzik");
1740 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1741 MODULE_LICENSE("GPL");
1742 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1743 MODULE_VERSION(DRV_VERSION);
1745 module_init(ahci_init);
1746 module_exit(ahci_exit);