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 "2.1"
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,
85 /* global controller registers */
86 HOST_CAP = 0x00, /* host capabilities */
87 HOST_CTL = 0x04, /* global host control */
88 HOST_IRQ_STAT = 0x08, /* interrupt status */
89 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
90 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
93 HOST_RESET = (1 << 0), /* reset controller; self-clear */
94 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
95 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
98 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
99 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
100 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
101 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
102 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
104 /* registers for each SATA port */
105 PORT_LST_ADDR = 0x00, /* command list DMA addr */
106 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
107 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
108 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
109 PORT_IRQ_STAT = 0x10, /* interrupt status */
110 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
111 PORT_CMD = 0x18, /* port command */
112 PORT_TFDATA = 0x20, /* taskfile data */
113 PORT_SIG = 0x24, /* device TF signature */
114 PORT_CMD_ISSUE = 0x38, /* command issue */
115 PORT_SCR = 0x28, /* SATA phy register block */
116 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
117 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
118 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
119 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
121 /* PORT_IRQ_{STAT,MASK} bits */
122 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
123 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
124 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
125 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
126 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
127 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
128 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
129 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
131 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
132 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
133 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
134 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
135 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
136 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
137 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
138 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
139 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
141 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
146 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
148 PORT_IRQ_HBUS_DATA_ERR,
149 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
150 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
151 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
154 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
155 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
156 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
157 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
158 PORT_CMD_CLO = (1 << 3), /* Command list override */
159 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
160 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
161 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
163 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
164 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
165 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
166 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
169 AHCI_FLAG_NO_NCQ = (1 << 24),
170 AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */
171 AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */
172 AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */
175 struct ahci_cmd_hdr {
190 struct ahci_host_priv {
191 u32 cap; /* cap to use */
192 u32 port_map; /* port map to use */
193 u32 saved_cap; /* saved initial cap */
194 u32 saved_port_map; /* saved initial port_map */
197 struct ahci_port_priv {
198 struct ahci_cmd_hdr *cmd_slot;
199 dma_addr_t cmd_slot_dma;
201 dma_addr_t cmd_tbl_dma;
203 dma_addr_t rx_fis_dma;
204 /* for NCQ spurious interrupt analysis */
205 unsigned int ncq_saw_d2h:1;
206 unsigned int ncq_saw_dmas:1;
207 unsigned int ncq_saw_sdb:1;
210 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
211 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
212 static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
213 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
214 static irqreturn_t ahci_interrupt (int irq, void *dev_instance);
215 static void ahci_irq_clear(struct ata_port *ap);
216 static int ahci_port_start(struct ata_port *ap);
217 static void ahci_port_stop(struct ata_port *ap);
218 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
219 static void ahci_qc_prep(struct ata_queued_cmd *qc);
220 static u8 ahci_check_status(struct ata_port *ap);
221 static void ahci_freeze(struct ata_port *ap);
222 static void ahci_thaw(struct ata_port *ap);
223 static void ahci_error_handler(struct ata_port *ap);
224 static void ahci_vt8251_error_handler(struct ata_port *ap);
225 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
227 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
228 static int ahci_port_resume(struct ata_port *ap);
229 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
230 static int ahci_pci_device_resume(struct pci_dev *pdev);
233 static struct scsi_host_template ahci_sht = {
234 .module = THIS_MODULE,
236 .ioctl = ata_scsi_ioctl,
237 .queuecommand = ata_scsi_queuecmd,
238 .change_queue_depth = ata_scsi_change_queue_depth,
239 .can_queue = AHCI_MAX_CMDS - 1,
240 .this_id = ATA_SHT_THIS_ID,
241 .sg_tablesize = AHCI_MAX_SG,
242 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
243 .emulated = ATA_SHT_EMULATED,
244 .use_clustering = AHCI_USE_CLUSTERING,
245 .proc_name = DRV_NAME,
246 .dma_boundary = AHCI_DMA_BOUNDARY,
247 .slave_configure = ata_scsi_slave_config,
248 .slave_destroy = ata_scsi_slave_destroy,
249 .bios_param = ata_std_bios_param,
251 .suspend = ata_scsi_device_suspend,
252 .resume = ata_scsi_device_resume,
256 static const struct ata_port_operations ahci_ops = {
257 .port_disable = ata_port_disable,
259 .check_status = ahci_check_status,
260 .check_altstatus = ahci_check_status,
261 .dev_select = ata_noop_dev_select,
263 .tf_read = ahci_tf_read,
265 .qc_prep = ahci_qc_prep,
266 .qc_issue = ahci_qc_issue,
268 .irq_handler = ahci_interrupt,
269 .irq_clear = ahci_irq_clear,
270 .irq_on = ata_dummy_irq_on,
271 .irq_ack = ata_dummy_irq_ack,
273 .scr_read = ahci_scr_read,
274 .scr_write = ahci_scr_write,
276 .freeze = ahci_freeze,
279 .error_handler = ahci_error_handler,
280 .post_internal_cmd = ahci_post_internal_cmd,
283 .port_suspend = ahci_port_suspend,
284 .port_resume = ahci_port_resume,
287 .port_start = ahci_port_start,
288 .port_stop = ahci_port_stop,
291 static const struct ata_port_operations ahci_vt8251_ops = {
292 .port_disable = ata_port_disable,
294 .check_status = ahci_check_status,
295 .check_altstatus = ahci_check_status,
296 .dev_select = ata_noop_dev_select,
298 .tf_read = ahci_tf_read,
300 .qc_prep = ahci_qc_prep,
301 .qc_issue = ahci_qc_issue,
303 .irq_handler = ahci_interrupt,
304 .irq_clear = ahci_irq_clear,
305 .irq_on = ata_dummy_irq_on,
306 .irq_ack = ata_dummy_irq_ack,
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[] = {
330 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
331 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
332 ATA_FLAG_SKIP_D2H_BSY,
333 .pio_mask = 0x1f, /* pio0-4 */
334 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
335 .port_ops = &ahci_ops,
340 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
341 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
342 ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_HONOR_PI,
343 .pio_mask = 0x1f, /* pio0-4 */
344 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
345 .port_ops = &ahci_ops,
347 /* board_ahci_vt8251 */
350 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
351 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
352 ATA_FLAG_SKIP_D2H_BSY |
353 ATA_FLAG_HRST_TO_RESUME | AHCI_FLAG_NO_NCQ,
354 .pio_mask = 0x1f, /* pio0-4 */
355 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
356 .port_ops = &ahci_vt8251_ops,
358 /* board_ahci_ign_iferr */
361 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
362 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
363 ATA_FLAG_SKIP_D2H_BSY |
364 AHCI_FLAG_IGN_IRQ_IF_ERR,
365 .pio_mask = 0x1f, /* pio0-4 */
366 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
367 .port_ops = &ahci_ops,
369 /* board_ahci_sb600 */
372 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
373 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
374 ATA_FLAG_SKIP_D2H_BSY |
375 AHCI_FLAG_IGN_SERR_INTERNAL,
376 .pio_mask = 0x1f, /* pio0-4 */
377 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
378 .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 non-raid */
419 { PCI_VDEVICE(ATI, 0x4381), board_ahci }, /* ATI SB600 raid */
422 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
425 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
426 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
427 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
428 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
429 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
430 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
431 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
432 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
433 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
434 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
435 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
436 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
437 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
438 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
439 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
440 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
441 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
442 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
443 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
444 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
447 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
448 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
449 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
451 /* Generic, PCI class code for AHCI */
452 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
453 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
455 { } /* terminate list */
459 static struct pci_driver ahci_pci_driver = {
461 .id_table = ahci_pci_tbl,
462 .probe = ahci_init_one,
463 .remove = ata_pci_remove_one,
465 .suspend = ahci_pci_device_suspend,
466 .resume = ahci_pci_device_resume,
471 static inline int ahci_nr_ports(u32 cap)
473 return (cap & 0x1f) + 1;
476 static inline void __iomem *ahci_port_base(void __iomem *base,
479 return base + 0x100 + (port * 0x80);
483 * ahci_save_initial_config - Save and fixup initial config values
484 * @probe_ent: probe_ent of target device
486 * Some registers containing configuration info might be setup by
487 * BIOS and might be cleared on reset. This function saves the
488 * initial values of those registers into @hpriv such that they
489 * can be restored after controller reset.
491 * If inconsistent, config values are fixed up by this function.
496 static void ahci_save_initial_config(struct ata_probe_ent *probe_ent)
498 struct ahci_host_priv *hpriv = probe_ent->private_data;
499 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
502 /* Values prefixed with saved_ are written back to host after
503 * reset. Values without are used for driver operation.
505 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
506 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
508 /* fixup zero port_map */
510 port_map = (1 << ahci_nr_ports(hpriv->cap)) - 1;
511 dev_printk(KERN_WARNING, probe_ent->dev,
512 "PORTS_IMPL is zero, forcing 0x%x\n", port_map);
514 /* write the fixed up value to the PI register */
515 hpriv->saved_port_map = port_map;
518 /* record values to use during operation */
520 hpriv->port_map = port_map;
524 * ahci_restore_initial_config - Restore initial config
525 * @mmio: MMIO base for the host
526 * @hpriv: host private data
528 * Restore initial config stored by ahci_save_initial_config().
533 static void ahci_restore_initial_config(void __iomem *mmio,
534 struct ahci_host_priv *hpriv)
536 writel(hpriv->saved_cap, mmio + HOST_CAP);
537 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
538 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
541 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
546 case SCR_STATUS: sc_reg = 0; break;
547 case SCR_CONTROL: sc_reg = 1; break;
548 case SCR_ERROR: sc_reg = 2; break;
549 case SCR_ACTIVE: sc_reg = 3; break;
554 return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
558 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
564 case SCR_STATUS: sc_reg = 0; break;
565 case SCR_CONTROL: sc_reg = 1; break;
566 case SCR_ERROR: sc_reg = 2; break;
567 case SCR_ACTIVE: sc_reg = 3; break;
572 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
575 static void ahci_start_engine(void __iomem *port_mmio)
580 tmp = readl(port_mmio + PORT_CMD);
581 tmp |= PORT_CMD_START;
582 writel(tmp, port_mmio + PORT_CMD);
583 readl(port_mmio + PORT_CMD); /* flush */
586 static int ahci_stop_engine(void __iomem *port_mmio)
590 tmp = readl(port_mmio + PORT_CMD);
592 /* check if the HBA is idle */
593 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
596 /* setting HBA to idle */
597 tmp &= ~PORT_CMD_START;
598 writel(tmp, port_mmio + PORT_CMD);
600 /* wait for engine to stop. This could be as long as 500 msec */
601 tmp = ata_wait_register(port_mmio + PORT_CMD,
602 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
603 if (tmp & PORT_CMD_LIST_ON)
609 static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap,
610 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
614 /* set FIS registers */
615 if (cap & HOST_CAP_64)
616 writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
617 writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
619 if (cap & HOST_CAP_64)
620 writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
621 writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
623 /* enable FIS reception */
624 tmp = readl(port_mmio + PORT_CMD);
625 tmp |= PORT_CMD_FIS_RX;
626 writel(tmp, port_mmio + PORT_CMD);
629 readl(port_mmio + PORT_CMD);
632 static int ahci_stop_fis_rx(void __iomem *port_mmio)
636 /* disable FIS reception */
637 tmp = readl(port_mmio + PORT_CMD);
638 tmp &= ~PORT_CMD_FIS_RX;
639 writel(tmp, port_mmio + PORT_CMD);
641 /* wait for completion, spec says 500ms, give it 1000 */
642 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
643 PORT_CMD_FIS_ON, 10, 1000);
644 if (tmp & PORT_CMD_FIS_ON)
650 static void ahci_power_up(void __iomem *port_mmio, u32 cap)
654 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
657 if (cap & HOST_CAP_SSS) {
658 cmd |= PORT_CMD_SPIN_UP;
659 writel(cmd, port_mmio + PORT_CMD);
663 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
667 static void ahci_power_down(void __iomem *port_mmio, u32 cap)
671 if (!(cap & HOST_CAP_SSS))
674 /* put device into listen mode, first set PxSCTL.DET to 0 */
675 scontrol = readl(port_mmio + PORT_SCR_CTL);
677 writel(scontrol, port_mmio + PORT_SCR_CTL);
679 /* then set PxCMD.SUD to 0 */
680 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
681 cmd &= ~PORT_CMD_SPIN_UP;
682 writel(cmd, port_mmio + PORT_CMD);
686 static void ahci_init_port(void __iomem *port_mmio, u32 cap,
687 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
689 /* enable FIS reception */
690 ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma);
693 ahci_start_engine(port_mmio);
696 static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg)
701 rc = ahci_stop_engine(port_mmio);
703 *emsg = "failed to stop engine";
707 /* disable FIS reception */
708 rc = ahci_stop_fis_rx(port_mmio);
710 *emsg = "failed stop FIS RX";
717 static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev,
718 struct ahci_host_priv *hpriv)
722 /* global controller reset */
723 tmp = readl(mmio + HOST_CTL);
724 if ((tmp & HOST_RESET) == 0) {
725 writel(tmp | HOST_RESET, mmio + HOST_CTL);
726 readl(mmio + HOST_CTL); /* flush */
729 /* reset must complete within 1 second, or
730 * the hardware should be considered fried.
734 tmp = readl(mmio + HOST_CTL);
735 if (tmp & HOST_RESET) {
736 dev_printk(KERN_ERR, &pdev->dev,
737 "controller reset failed (0x%x)\n", tmp);
741 /* turn on AHCI mode */
742 writel(HOST_AHCI_EN, mmio + HOST_CTL);
743 (void) readl(mmio + HOST_CTL); /* flush */
745 /* some registers might be cleared on reset. restore initial values */
746 ahci_restore_initial_config(mmio, hpriv);
748 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
752 pci_read_config_word(pdev, 0x92, &tmp16);
754 pci_write_config_word(pdev, 0x92, tmp16);
760 static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
761 int n_ports, unsigned int port_flags,
762 struct ahci_host_priv *hpriv)
767 for (i = 0; i < n_ports; i++) {
768 void __iomem *port_mmio = ahci_port_base(mmio, i);
769 const char *emsg = NULL;
771 if ((port_flags & AHCI_FLAG_HONOR_PI) &&
772 !(hpriv->port_map & (1 << i)))
775 /* make sure port is not active */
776 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
778 dev_printk(KERN_WARNING, &pdev->dev,
779 "%s (%d)\n", emsg, rc);
782 tmp = readl(port_mmio + PORT_SCR_ERR);
783 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
784 writel(tmp, port_mmio + PORT_SCR_ERR);
787 tmp = readl(port_mmio + PORT_IRQ_STAT);
788 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
790 writel(tmp, port_mmio + PORT_IRQ_STAT);
792 writel(1 << i, mmio + HOST_IRQ_STAT);
795 tmp = readl(mmio + HOST_CTL);
796 VPRINTK("HOST_CTL 0x%x\n", tmp);
797 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
798 tmp = readl(mmio + HOST_CTL);
799 VPRINTK("HOST_CTL 0x%x\n", tmp);
802 static unsigned int ahci_dev_classify(struct ata_port *ap)
804 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
805 struct ata_taskfile tf;
808 tmp = readl(port_mmio + PORT_SIG);
809 tf.lbah = (tmp >> 24) & 0xff;
810 tf.lbam = (tmp >> 16) & 0xff;
811 tf.lbal = (tmp >> 8) & 0xff;
812 tf.nsect = (tmp) & 0xff;
814 return ata_dev_classify(&tf);
817 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
820 dma_addr_t cmd_tbl_dma;
822 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
824 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
825 pp->cmd_slot[tag].status = 0;
826 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
827 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
830 static int ahci_clo(struct ata_port *ap)
832 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
833 struct ahci_host_priv *hpriv = ap->host->private_data;
836 if (!(hpriv->cap & HOST_CAP_CLO))
839 tmp = readl(port_mmio + PORT_CMD);
841 writel(tmp, port_mmio + PORT_CMD);
843 tmp = ata_wait_register(port_mmio + PORT_CMD,
844 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
845 if (tmp & PORT_CMD_CLO)
851 static int ahci_softreset(struct ata_port *ap, unsigned int *class)
853 struct ahci_port_priv *pp = ap->private_data;
854 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
855 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
856 const u32 cmd_fis_len = 5; /* five dwords */
857 const char *reason = NULL;
858 struct ata_taskfile tf;
865 if (ata_port_offline(ap)) {
866 DPRINTK("PHY reports no device\n");
867 *class = ATA_DEV_NONE;
871 /* prepare for SRST (AHCI-1.1 10.4.1) */
872 rc = ahci_stop_engine(port_mmio);
874 reason = "failed to stop engine";
878 /* check BUSY/DRQ, perform Command List Override if necessary */
879 if (ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ)) {
882 if (rc == -EOPNOTSUPP) {
883 reason = "port busy but CLO unavailable";
886 reason = "port busy but CLO failed";
892 ahci_start_engine(port_mmio);
894 ata_tf_init(ap->device, &tf);
897 /* issue the first D2H Register FIS */
898 ahci_fill_cmd_slot(pp, 0,
899 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
902 ata_tf_to_fis(&tf, fis, 0);
903 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
905 writel(1, port_mmio + PORT_CMD_ISSUE);
907 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
910 reason = "1st FIS failed";
914 /* spec says at least 5us, but be generous and sleep for 1ms */
917 /* issue the second D2H Register FIS */
918 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
921 ata_tf_to_fis(&tf, fis, 0);
922 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
924 writel(1, port_mmio + PORT_CMD_ISSUE);
925 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
927 /* spec mandates ">= 2ms" before checking status.
928 * We wait 150ms, because that was the magic delay used for
929 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
930 * between when the ATA command register is written, and then
931 * status is checked. Because waiting for "a while" before
932 * checking status is fine, post SRST, we perform this magic
933 * delay here as well.
937 *class = ATA_DEV_NONE;
938 if (ata_port_online(ap)) {
939 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
941 reason = "device not ready";
944 *class = ahci_dev_classify(ap);
947 DPRINTK("EXIT, class=%u\n", *class);
951 ahci_start_engine(port_mmio);
953 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
957 static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
959 struct ahci_port_priv *pp = ap->private_data;
960 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
961 struct ata_taskfile tf;
962 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
963 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
968 ahci_stop_engine(port_mmio);
970 /* clear D2H reception area to properly wait for D2H FIS */
971 ata_tf_init(ap->device, &tf);
973 ata_tf_to_fis(&tf, d2h_fis, 0);
975 rc = sata_std_hardreset(ap, class);
977 ahci_start_engine(port_mmio);
979 if (rc == 0 && ata_port_online(ap))
980 *class = ahci_dev_classify(ap);
981 if (*class == ATA_DEV_UNKNOWN)
982 *class = ATA_DEV_NONE;
984 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
988 static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class)
990 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
991 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
996 ahci_stop_engine(port_mmio);
998 rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context));
1000 /* vt8251 needs SError cleared for the port to operate */
1001 ahci_scr_write(ap, SCR_ERROR, ahci_scr_read(ap, SCR_ERROR));
1003 ahci_start_engine(port_mmio);
1005 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1007 /* vt8251 doesn't clear BSY on signature FIS reception,
1008 * request follow-up softreset.
1010 return rc ?: -EAGAIN;
1013 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
1015 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1018 ata_std_postreset(ap, class);
1020 /* Make sure port's ATAPI bit is set appropriately */
1021 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1022 if (*class == ATA_DEV_ATAPI)
1023 new_tmp |= PORT_CMD_ATAPI;
1025 new_tmp &= ~PORT_CMD_ATAPI;
1026 if (new_tmp != tmp) {
1027 writel(new_tmp, port_mmio + PORT_CMD);
1028 readl(port_mmio + PORT_CMD); /* flush */
1032 static u8 ahci_check_status(struct ata_port *ap)
1034 void __iomem *mmio = ap->ioaddr.cmd_addr;
1036 return readl(mmio + PORT_TFDATA) & 0xFF;
1039 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
1041 struct ahci_port_priv *pp = ap->private_data;
1042 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1044 ata_tf_from_fis(d2h_fis, tf);
1047 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1049 struct scatterlist *sg;
1050 struct ahci_sg *ahci_sg;
1051 unsigned int n_sg = 0;
1056 * Next, the S/G list.
1058 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1059 ata_for_each_sg(sg, qc) {
1060 dma_addr_t addr = sg_dma_address(sg);
1061 u32 sg_len = sg_dma_len(sg);
1063 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1064 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1065 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
1074 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1076 struct ata_port *ap = qc->ap;
1077 struct ahci_port_priv *pp = ap->private_data;
1078 int is_atapi = is_atapi_taskfile(&qc->tf);
1081 const u32 cmd_fis_len = 5; /* five dwords */
1082 unsigned int n_elem;
1085 * Fill in command table information. First, the header,
1086 * a SATA Register - Host to Device command FIS.
1088 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1090 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
1092 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1093 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1097 if (qc->flags & ATA_QCFLAG_DMAMAP)
1098 n_elem = ahci_fill_sg(qc, cmd_tbl);
1101 * Fill in command slot information.
1103 opts = cmd_fis_len | n_elem << 16;
1104 if (qc->tf.flags & ATA_TFLAG_WRITE)
1105 opts |= AHCI_CMD_WRITE;
1107 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1109 ahci_fill_cmd_slot(pp, qc->tag, opts);
1112 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1114 struct ahci_port_priv *pp = ap->private_data;
1115 struct ata_eh_info *ehi = &ap->eh_info;
1116 unsigned int err_mask = 0, action = 0;
1117 struct ata_queued_cmd *qc;
1120 ata_ehi_clear_desc(ehi);
1122 /* AHCI needs SError cleared; otherwise, it might lock up */
1123 serror = ahci_scr_read(ap, SCR_ERROR);
1124 ahci_scr_write(ap, SCR_ERROR, serror);
1126 /* analyze @irq_stat */
1127 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1129 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1130 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1131 irq_stat &= ~PORT_IRQ_IF_ERR;
1133 if (irq_stat & PORT_IRQ_TF_ERR) {
1134 err_mask |= AC_ERR_DEV;
1135 if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
1136 serror &= ~SERR_INTERNAL;
1139 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1140 err_mask |= AC_ERR_HOST_BUS;
1141 action |= ATA_EH_SOFTRESET;
1144 if (irq_stat & PORT_IRQ_IF_ERR) {
1145 err_mask |= AC_ERR_ATA_BUS;
1146 action |= ATA_EH_SOFTRESET;
1147 ata_ehi_push_desc(ehi, ", interface fatal error");
1150 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1151 ata_ehi_hotplugged(ehi);
1152 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
1153 "connection status changed" : "PHY RDY changed");
1156 if (irq_stat & PORT_IRQ_UNK_FIS) {
1157 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1159 err_mask |= AC_ERR_HSM;
1160 action |= ATA_EH_SOFTRESET;
1161 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
1162 unk[0], unk[1], unk[2], unk[3]);
1165 /* okay, let's hand over to EH */
1166 ehi->serror |= serror;
1167 ehi->action |= action;
1169 qc = ata_qc_from_tag(ap, ap->active_tag);
1171 qc->err_mask |= err_mask;
1173 ehi->err_mask |= err_mask;
1175 if (irq_stat & PORT_IRQ_FREEZE)
1176 ata_port_freeze(ap);
1181 static void ahci_host_intr(struct ata_port *ap)
1183 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1184 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1185 struct ata_eh_info *ehi = &ap->eh_info;
1186 struct ahci_port_priv *pp = ap->private_data;
1187 u32 status, qc_active;
1188 int rc, known_irq = 0;
1190 status = readl(port_mmio + PORT_IRQ_STAT);
1191 writel(status, port_mmio + PORT_IRQ_STAT);
1193 if (unlikely(status & PORT_IRQ_ERROR)) {
1194 ahci_error_intr(ap, status);
1199 qc_active = readl(port_mmio + PORT_SCR_ACT);
1201 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1203 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1207 ehi->err_mask |= AC_ERR_HSM;
1208 ehi->action |= ATA_EH_SOFTRESET;
1209 ata_port_freeze(ap);
1213 /* hmmm... a spurious interupt */
1215 /* if !NCQ, ignore. No modern ATA device has broken HSM
1216 * implementation for non-NCQ commands.
1221 if (status & PORT_IRQ_D2H_REG_FIS) {
1222 if (!pp->ncq_saw_d2h)
1223 ata_port_printk(ap, KERN_INFO,
1224 "D2H reg with I during NCQ, "
1225 "this message won't be printed again\n");
1226 pp->ncq_saw_d2h = 1;
1230 if (status & PORT_IRQ_DMAS_FIS) {
1231 if (!pp->ncq_saw_dmas)
1232 ata_port_printk(ap, KERN_INFO,
1233 "DMAS FIS during NCQ, "
1234 "this message won't be printed again\n");
1235 pp->ncq_saw_dmas = 1;
1239 if (status & PORT_IRQ_SDB_FIS) {
1240 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1242 if (le32_to_cpu(f[1])) {
1243 /* SDB FIS containing spurious completions
1244 * might be dangerous, whine and fail commands
1245 * with HSM violation. EH will turn off NCQ
1246 * after several such failures.
1248 ata_ehi_push_desc(ehi,
1249 "spurious completions during NCQ "
1250 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1251 readl(port_mmio + PORT_CMD_ISSUE),
1252 readl(port_mmio + PORT_SCR_ACT),
1253 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1254 ehi->err_mask |= AC_ERR_HSM;
1255 ehi->action |= ATA_EH_SOFTRESET;
1256 ata_port_freeze(ap);
1258 if (!pp->ncq_saw_sdb)
1259 ata_port_printk(ap, KERN_INFO,
1260 "spurious SDB FIS %08x:%08x during NCQ, "
1261 "this message won't be printed again\n",
1262 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1263 pp->ncq_saw_sdb = 1;
1269 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1270 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1271 status, ap->active_tag, ap->sactive);
1274 static void ahci_irq_clear(struct ata_port *ap)
1279 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1281 struct ata_host *host = dev_instance;
1282 struct ahci_host_priv *hpriv;
1283 unsigned int i, handled = 0;
1285 u32 irq_stat, irq_ack = 0;
1289 hpriv = host->private_data;
1290 mmio = host->iomap[AHCI_PCI_BAR];
1292 /* sigh. 0xffffffff is a valid return from h/w */
1293 irq_stat = readl(mmio + HOST_IRQ_STAT);
1294 irq_stat &= hpriv->port_map;
1298 spin_lock(&host->lock);
1300 for (i = 0; i < host->n_ports; i++) {
1301 struct ata_port *ap;
1303 if (!(irq_stat & (1 << i)))
1306 ap = host->ports[i];
1309 VPRINTK("port %u\n", i);
1311 VPRINTK("port %u (no irq)\n", i);
1312 if (ata_ratelimit())
1313 dev_printk(KERN_WARNING, host->dev,
1314 "interrupt on disabled port %u\n", i);
1317 irq_ack |= (1 << i);
1321 writel(irq_ack, mmio + HOST_IRQ_STAT);
1325 spin_unlock(&host->lock);
1329 return IRQ_RETVAL(handled);
1332 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1334 struct ata_port *ap = qc->ap;
1335 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1337 if (qc->tf.protocol == ATA_PROT_NCQ)
1338 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1339 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1340 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1345 static void ahci_freeze(struct ata_port *ap)
1347 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1348 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1351 writel(0, port_mmio + PORT_IRQ_MASK);
1354 static void ahci_thaw(struct ata_port *ap)
1356 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1357 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1361 tmp = readl(port_mmio + PORT_IRQ_STAT);
1362 writel(tmp, port_mmio + PORT_IRQ_STAT);
1363 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1365 /* turn IRQ back on */
1366 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1369 static void ahci_error_handler(struct ata_port *ap)
1371 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1372 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1374 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1375 /* restart engine */
1376 ahci_stop_engine(port_mmio);
1377 ahci_start_engine(port_mmio);
1380 /* perform recovery */
1381 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
1385 static void ahci_vt8251_error_handler(struct ata_port *ap)
1387 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1388 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1390 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1391 /* restart engine */
1392 ahci_stop_engine(port_mmio);
1393 ahci_start_engine(port_mmio);
1396 /* perform recovery */
1397 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1401 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1403 struct ata_port *ap = qc->ap;
1404 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1405 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1407 if (qc->flags & ATA_QCFLAG_FAILED)
1408 qc->err_mask |= AC_ERR_OTHER;
1411 /* make DMA engine forget about the failed command */
1412 ahci_stop_engine(port_mmio);
1413 ahci_start_engine(port_mmio);
1418 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1420 struct ahci_host_priv *hpriv = ap->host->private_data;
1421 struct ahci_port_priv *pp = ap->private_data;
1422 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1423 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1424 const char *emsg = NULL;
1427 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1429 ahci_power_down(port_mmio, hpriv->cap);
1431 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1432 ahci_init_port(port_mmio, hpriv->cap,
1433 pp->cmd_slot_dma, pp->rx_fis_dma);
1439 static int ahci_port_resume(struct ata_port *ap)
1441 struct ahci_port_priv *pp = ap->private_data;
1442 struct ahci_host_priv *hpriv = ap->host->private_data;
1443 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1444 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1446 ahci_power_up(port_mmio, hpriv->cap);
1447 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1452 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1454 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1455 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1458 if (mesg.event == PM_EVENT_SUSPEND) {
1459 /* AHCI spec rev1.1 section 8.3.3:
1460 * Software must disable interrupts prior to requesting a
1461 * transition of the HBA to D3 state.
1463 ctl = readl(mmio + HOST_CTL);
1464 ctl &= ~HOST_IRQ_EN;
1465 writel(ctl, mmio + HOST_CTL);
1466 readl(mmio + HOST_CTL); /* flush */
1469 return ata_pci_device_suspend(pdev, mesg);
1472 static int ahci_pci_device_resume(struct pci_dev *pdev)
1474 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1475 struct ahci_host_priv *hpriv = host->private_data;
1476 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1479 rc = ata_pci_device_do_resume(pdev);
1483 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1484 rc = ahci_reset_controller(mmio, pdev, hpriv);
1488 ahci_init_controller(mmio, pdev, host->n_ports,
1489 host->ports[0]->flags, hpriv);
1492 ata_host_resume(host);
1498 static int ahci_port_start(struct ata_port *ap)
1500 struct device *dev = ap->host->dev;
1501 struct ahci_host_priv *hpriv = ap->host->private_data;
1502 struct ahci_port_priv *pp;
1503 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1504 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1509 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1513 rc = ata_pad_alloc(ap, dev);
1517 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1521 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1524 * First item in chunk of DMA memory: 32-slot command table,
1525 * 32 bytes each in size
1528 pp->cmd_slot_dma = mem_dma;
1530 mem += AHCI_CMD_SLOT_SZ;
1531 mem_dma += AHCI_CMD_SLOT_SZ;
1534 * Second item: Received-FIS area
1537 pp->rx_fis_dma = mem_dma;
1539 mem += AHCI_RX_FIS_SZ;
1540 mem_dma += AHCI_RX_FIS_SZ;
1543 * Third item: data area for storing a single command
1544 * and its scatter-gather table
1547 pp->cmd_tbl_dma = mem_dma;
1549 ap->private_data = pp;
1552 ahci_power_up(port_mmio, hpriv->cap);
1554 /* initialize port */
1555 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1560 static void ahci_port_stop(struct ata_port *ap)
1562 struct ahci_host_priv *hpriv = ap->host->private_data;
1563 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1564 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1565 const char *emsg = NULL;
1568 /* de-initialize port */
1569 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1571 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1574 static void ahci_setup_port(struct ata_ioports *port, void __iomem *base,
1575 unsigned int port_idx)
1577 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
1578 base = ahci_port_base(base, port_idx);
1579 VPRINTK("base now==0x%lx\n", base);
1581 port->cmd_addr = base;
1582 port->scr_addr = base + PORT_SCR;
1587 static int ahci_host_init(struct ata_probe_ent *probe_ent)
1589 struct ahci_host_priv *hpriv = probe_ent->private_data;
1590 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1591 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
1592 unsigned int i, cap_n_ports, using_dac;
1595 rc = ahci_reset_controller(mmio, pdev, hpriv);
1599 cap_n_ports = ahci_nr_ports(hpriv->cap);
1601 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1602 hpriv->cap, hpriv->port_map, cap_n_ports);
1604 if (probe_ent->port_flags & AHCI_FLAG_HONOR_PI) {
1605 unsigned int n_ports = cap_n_ports;
1606 u32 port_map = hpriv->port_map;
1609 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
1610 if (port_map & (1 << i)) {
1612 port_map &= ~(1 << i);
1615 probe_ent->dummy_port_mask |= 1 << i;
1618 if (n_ports || port_map)
1619 dev_printk(KERN_WARNING, &pdev->dev,
1620 "nr_ports (%u) and implemented port map "
1621 "(0x%x) don't match\n",
1622 cap_n_ports, hpriv->port_map);
1624 probe_ent->n_ports = max_port + 1;
1626 probe_ent->n_ports = cap_n_ports;
1628 using_dac = hpriv->cap & HOST_CAP_64;
1630 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1631 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1633 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1635 dev_printk(KERN_ERR, &pdev->dev,
1636 "64-bit DMA enable failed\n");
1641 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1643 dev_printk(KERN_ERR, &pdev->dev,
1644 "32-bit DMA enable failed\n");
1647 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1649 dev_printk(KERN_ERR, &pdev->dev,
1650 "32-bit consistent DMA enable failed\n");
1655 for (i = 0; i < probe_ent->n_ports; i++)
1656 ahci_setup_port(&probe_ent->port[i], mmio, i);
1658 ahci_init_controller(mmio, pdev, probe_ent->n_ports,
1659 probe_ent->port_flags, hpriv);
1661 pci_set_master(pdev);
1666 static void ahci_print_info(struct ata_probe_ent *probe_ent)
1668 struct ahci_host_priv *hpriv = probe_ent->private_data;
1669 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1670 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
1671 u32 vers, cap, impl, speed;
1672 const char *speed_s;
1676 vers = readl(mmio + HOST_VERSION);
1678 impl = hpriv->port_map;
1680 speed = (cap >> 20) & 0xf;
1683 else if (speed == 2)
1688 pci_read_config_word(pdev, 0x0a, &cc);
1689 if (cc == PCI_CLASS_STORAGE_IDE)
1691 else if (cc == PCI_CLASS_STORAGE_SATA)
1693 else if (cc == PCI_CLASS_STORAGE_RAID)
1698 dev_printk(KERN_INFO, &pdev->dev,
1699 "AHCI %02x%02x.%02x%02x "
1700 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1703 (vers >> 24) & 0xff,
1704 (vers >> 16) & 0xff,
1708 ((cap >> 8) & 0x1f) + 1,
1714 dev_printk(KERN_INFO, &pdev->dev,
1720 cap & (1 << 31) ? "64bit " : "",
1721 cap & (1 << 30) ? "ncq " : "",
1722 cap & (1 << 28) ? "ilck " : "",
1723 cap & (1 << 27) ? "stag " : "",
1724 cap & (1 << 26) ? "pm " : "",
1725 cap & (1 << 25) ? "led " : "",
1727 cap & (1 << 24) ? "clo " : "",
1728 cap & (1 << 19) ? "nz " : "",
1729 cap & (1 << 18) ? "only " : "",
1730 cap & (1 << 17) ? "pmp " : "",
1731 cap & (1 << 15) ? "pio " : "",
1732 cap & (1 << 14) ? "slum " : "",
1733 cap & (1 << 13) ? "part " : ""
1737 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1739 static int printed_version;
1740 unsigned int board_idx = (unsigned int) ent->driver_data;
1741 struct device *dev = &pdev->dev;
1742 struct ata_probe_ent *probe_ent;
1743 struct ahci_host_priv *hpriv;
1748 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1750 if (!printed_version++)
1751 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1753 rc = pcim_enable_device(pdev);
1757 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1759 pcim_pin_device(pdev);
1763 if (pci_enable_msi(pdev))
1766 probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
1767 if (probe_ent == NULL)
1770 probe_ent->dev = pci_dev_to_dev(pdev);
1771 INIT_LIST_HEAD(&probe_ent->node);
1773 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1777 probe_ent->sht = ahci_port_info[board_idx].sht;
1778 probe_ent->port_flags = ahci_port_info[board_idx].flags;
1779 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1780 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1781 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1783 probe_ent->irq = pdev->irq;
1784 probe_ent->irq_flags = IRQF_SHARED;
1785 probe_ent->iomap = pcim_iomap_table(pdev);
1786 probe_ent->private_data = hpriv;
1788 /* initialize adapter */
1789 ahci_save_initial_config(probe_ent);
1791 rc = ahci_host_init(probe_ent);
1795 if (!(probe_ent->port_flags & AHCI_FLAG_NO_NCQ) &&
1796 (hpriv->cap & HOST_CAP_NCQ))
1797 probe_ent->port_flags |= ATA_FLAG_NCQ;
1799 ahci_print_info(probe_ent);
1801 if (!ata_device_add(probe_ent))
1804 devm_kfree(dev, probe_ent);
1808 static int __init ahci_init(void)
1810 return pci_register_driver(&ahci_pci_driver);
1813 static void __exit ahci_exit(void)
1815 pci_unregister_driver(&ahci_pci_driver);
1819 MODULE_AUTHOR("Jeff Garzik");
1820 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1821 MODULE_LICENSE("GPL");
1822 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1823 MODULE_VERSION(DRV_VERSION);
1825 module_init(ahci_init);
1826 module_exit(ahci_exit);