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 */
421 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
424 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
425 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
426 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
427 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
428 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
429 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
430 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
431 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
432 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
433 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
434 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
435 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
436 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
437 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
438 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
439 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
440 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
441 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
442 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
443 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
446 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
447 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
448 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
450 /* Generic, PCI class code for AHCI */
451 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
452 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
454 { } /* terminate list */
458 static struct pci_driver ahci_pci_driver = {
460 .id_table = ahci_pci_tbl,
461 .probe = ahci_init_one,
462 .remove = ata_pci_remove_one,
464 .suspend = ahci_pci_device_suspend,
465 .resume = ahci_pci_device_resume,
470 static inline int ahci_nr_ports(u32 cap)
472 return (cap & 0x1f) + 1;
475 static inline void __iomem *ahci_port_base(void __iomem *base,
478 return base + 0x100 + (port * 0x80);
482 * ahci_save_initial_config - Save and fixup initial config values
483 * @probe_ent: probe_ent of target device
485 * Some registers containing configuration info might be setup by
486 * BIOS and might be cleared on reset. This function saves the
487 * initial values of those registers into @hpriv such that they
488 * can be restored after controller reset.
490 * If inconsistent, config values are fixed up by this function.
495 static void ahci_save_initial_config(struct ata_probe_ent *probe_ent)
497 struct ahci_host_priv *hpriv = probe_ent->private_data;
498 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 /* cross check port_map and cap.n_ports */
519 if (probe_ent->port_flags & AHCI_FLAG_HONOR_PI) {
520 u32 tmp_port_map = port_map;
521 int n_ports = ahci_nr_ports(cap);
523 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
524 if (tmp_port_map & (1 << i)) {
526 tmp_port_map &= ~(1 << i);
530 /* Whine if inconsistent. No need to update cap.
531 * port_map is used to determine number of ports.
533 if (n_ports || tmp_port_map)
534 dev_printk(KERN_WARNING, probe_ent->dev,
535 "nr_ports (%u) and implemented port map "
536 "(0x%x) don't match\n",
537 ahci_nr_ports(cap), port_map);
539 /* fabricate port_map from cap.nr_ports */
540 port_map = (1 << ahci_nr_ports(cap)) - 1;
543 /* record values to use during operation */
545 hpriv->port_map = port_map;
549 * ahci_restore_initial_config - Restore initial config
550 * @mmio: MMIO base for the host
551 * @hpriv: host private data
553 * Restore initial config stored by ahci_save_initial_config().
558 static void ahci_restore_initial_config(void __iomem *mmio,
559 struct ahci_host_priv *hpriv)
561 writel(hpriv->saved_cap, mmio + HOST_CAP);
562 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
563 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
566 static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
571 case SCR_STATUS: sc_reg = 0; break;
572 case SCR_CONTROL: sc_reg = 1; break;
573 case SCR_ERROR: sc_reg = 2; break;
574 case SCR_ACTIVE: sc_reg = 3; break;
579 return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
583 static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
589 case SCR_STATUS: sc_reg = 0; break;
590 case SCR_CONTROL: sc_reg = 1; break;
591 case SCR_ERROR: sc_reg = 2; break;
592 case SCR_ACTIVE: sc_reg = 3; break;
597 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
600 static void ahci_start_engine(void __iomem *port_mmio)
605 tmp = readl(port_mmio + PORT_CMD);
606 tmp |= PORT_CMD_START;
607 writel(tmp, port_mmio + PORT_CMD);
608 readl(port_mmio + PORT_CMD); /* flush */
611 static int ahci_stop_engine(void __iomem *port_mmio)
615 tmp = readl(port_mmio + PORT_CMD);
617 /* check if the HBA is idle */
618 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
621 /* setting HBA to idle */
622 tmp &= ~PORT_CMD_START;
623 writel(tmp, port_mmio + PORT_CMD);
625 /* wait for engine to stop. This could be as long as 500 msec */
626 tmp = ata_wait_register(port_mmio + PORT_CMD,
627 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
628 if (tmp & PORT_CMD_LIST_ON)
634 static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap,
635 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
639 /* set FIS registers */
640 if (cap & HOST_CAP_64)
641 writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
642 writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
644 if (cap & HOST_CAP_64)
645 writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
646 writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
648 /* enable FIS reception */
649 tmp = readl(port_mmio + PORT_CMD);
650 tmp |= PORT_CMD_FIS_RX;
651 writel(tmp, port_mmio + PORT_CMD);
654 readl(port_mmio + PORT_CMD);
657 static int ahci_stop_fis_rx(void __iomem *port_mmio)
661 /* disable FIS reception */
662 tmp = readl(port_mmio + PORT_CMD);
663 tmp &= ~PORT_CMD_FIS_RX;
664 writel(tmp, port_mmio + PORT_CMD);
666 /* wait for completion, spec says 500ms, give it 1000 */
667 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
668 PORT_CMD_FIS_ON, 10, 1000);
669 if (tmp & PORT_CMD_FIS_ON)
675 static void ahci_power_up(void __iomem *port_mmio, u32 cap)
679 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
682 if (cap & HOST_CAP_SSS) {
683 cmd |= PORT_CMD_SPIN_UP;
684 writel(cmd, port_mmio + PORT_CMD);
688 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
692 static void ahci_power_down(void __iomem *port_mmio, u32 cap)
696 if (!(cap & HOST_CAP_SSS))
699 /* put device into listen mode, first set PxSCTL.DET to 0 */
700 scontrol = readl(port_mmio + PORT_SCR_CTL);
702 writel(scontrol, port_mmio + PORT_SCR_CTL);
704 /* then set PxCMD.SUD to 0 */
705 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
706 cmd &= ~PORT_CMD_SPIN_UP;
707 writel(cmd, port_mmio + PORT_CMD);
711 static void ahci_init_port(void __iomem *port_mmio, u32 cap,
712 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
714 /* enable FIS reception */
715 ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma);
718 ahci_start_engine(port_mmio);
721 static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg)
726 rc = ahci_stop_engine(port_mmio);
728 *emsg = "failed to stop engine";
732 /* disable FIS reception */
733 rc = ahci_stop_fis_rx(port_mmio);
735 *emsg = "failed stop FIS RX";
742 static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev,
743 struct ahci_host_priv *hpriv)
747 /* global controller reset */
748 tmp = readl(mmio + HOST_CTL);
749 if ((tmp & HOST_RESET) == 0) {
750 writel(tmp | HOST_RESET, mmio + HOST_CTL);
751 readl(mmio + HOST_CTL); /* flush */
754 /* reset must complete within 1 second, or
755 * the hardware should be considered fried.
759 tmp = readl(mmio + HOST_CTL);
760 if (tmp & HOST_RESET) {
761 dev_printk(KERN_ERR, &pdev->dev,
762 "controller reset failed (0x%x)\n", tmp);
766 /* turn on AHCI mode */
767 writel(HOST_AHCI_EN, mmio + HOST_CTL);
768 (void) readl(mmio + HOST_CTL); /* flush */
770 /* some registers might be cleared on reset. restore initial values */
771 ahci_restore_initial_config(mmio, hpriv);
773 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
777 pci_read_config_word(pdev, 0x92, &tmp16);
779 pci_write_config_word(pdev, 0x92, tmp16);
785 static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
786 int n_ports, unsigned int port_flags,
787 struct ahci_host_priv *hpriv)
792 for (i = 0; i < n_ports; i++) {
793 void __iomem *port_mmio = ahci_port_base(mmio, i);
794 const char *emsg = NULL;
796 if ((port_flags & AHCI_FLAG_HONOR_PI) &&
797 !(hpriv->port_map & (1 << i)))
800 /* make sure port is not active */
801 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
803 dev_printk(KERN_WARNING, &pdev->dev,
804 "%s (%d)\n", emsg, rc);
807 tmp = readl(port_mmio + PORT_SCR_ERR);
808 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
809 writel(tmp, port_mmio + PORT_SCR_ERR);
812 tmp = readl(port_mmio + PORT_IRQ_STAT);
813 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
815 writel(tmp, port_mmio + PORT_IRQ_STAT);
817 writel(1 << i, mmio + HOST_IRQ_STAT);
820 tmp = readl(mmio + HOST_CTL);
821 VPRINTK("HOST_CTL 0x%x\n", tmp);
822 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
823 tmp = readl(mmio + HOST_CTL);
824 VPRINTK("HOST_CTL 0x%x\n", tmp);
827 static unsigned int ahci_dev_classify(struct ata_port *ap)
829 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
830 struct ata_taskfile tf;
833 tmp = readl(port_mmio + PORT_SIG);
834 tf.lbah = (tmp >> 24) & 0xff;
835 tf.lbam = (tmp >> 16) & 0xff;
836 tf.lbal = (tmp >> 8) & 0xff;
837 tf.nsect = (tmp) & 0xff;
839 return ata_dev_classify(&tf);
842 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
845 dma_addr_t cmd_tbl_dma;
847 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
849 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
850 pp->cmd_slot[tag].status = 0;
851 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
852 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
855 static int ahci_clo(struct ata_port *ap)
857 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
858 struct ahci_host_priv *hpriv = ap->host->private_data;
861 if (!(hpriv->cap & HOST_CAP_CLO))
864 tmp = readl(port_mmio + PORT_CMD);
866 writel(tmp, port_mmio + PORT_CMD);
868 tmp = ata_wait_register(port_mmio + PORT_CMD,
869 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
870 if (tmp & PORT_CMD_CLO)
876 static int ahci_softreset(struct ata_port *ap, unsigned int *class)
878 struct ahci_port_priv *pp = ap->private_data;
879 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
880 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
881 const u32 cmd_fis_len = 5; /* five dwords */
882 const char *reason = NULL;
883 struct ata_taskfile tf;
890 if (ata_port_offline(ap)) {
891 DPRINTK("PHY reports no device\n");
892 *class = ATA_DEV_NONE;
896 /* prepare for SRST (AHCI-1.1 10.4.1) */
897 rc = ahci_stop_engine(port_mmio);
899 reason = "failed to stop engine";
903 /* check BUSY/DRQ, perform Command List Override if necessary */
904 if (ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ)) {
907 if (rc == -EOPNOTSUPP) {
908 reason = "port busy but CLO unavailable";
911 reason = "port busy but CLO failed";
917 ahci_start_engine(port_mmio);
919 ata_tf_init(ap->device, &tf);
922 /* issue the first D2H Register FIS */
923 ahci_fill_cmd_slot(pp, 0,
924 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
927 ata_tf_to_fis(&tf, fis, 0);
928 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
930 writel(1, port_mmio + PORT_CMD_ISSUE);
932 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
935 reason = "1st FIS failed";
939 /* spec says at least 5us, but be generous and sleep for 1ms */
942 /* issue the second D2H Register FIS */
943 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
946 ata_tf_to_fis(&tf, fis, 0);
947 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
949 writel(1, port_mmio + PORT_CMD_ISSUE);
950 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
952 /* spec mandates ">= 2ms" before checking status.
953 * We wait 150ms, because that was the magic delay used for
954 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
955 * between when the ATA command register is written, and then
956 * status is checked. Because waiting for "a while" before
957 * checking status is fine, post SRST, we perform this magic
958 * delay here as well.
962 *class = ATA_DEV_NONE;
963 if (ata_port_online(ap)) {
964 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
966 reason = "device not ready";
969 *class = ahci_dev_classify(ap);
972 DPRINTK("EXIT, class=%u\n", *class);
976 ahci_start_engine(port_mmio);
978 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
982 static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
984 struct ahci_port_priv *pp = ap->private_data;
985 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
986 struct ata_taskfile tf;
987 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
988 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
993 ahci_stop_engine(port_mmio);
995 /* clear D2H reception area to properly wait for D2H FIS */
996 ata_tf_init(ap->device, &tf);
998 ata_tf_to_fis(&tf, d2h_fis, 0);
1000 rc = sata_std_hardreset(ap, class);
1002 ahci_start_engine(port_mmio);
1004 if (rc == 0 && ata_port_online(ap))
1005 *class = ahci_dev_classify(ap);
1006 if (*class == ATA_DEV_UNKNOWN)
1007 *class = ATA_DEV_NONE;
1009 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1013 static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class)
1015 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1016 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1021 ahci_stop_engine(port_mmio);
1023 rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context));
1025 /* vt8251 needs SError cleared for the port to operate */
1026 ahci_scr_write(ap, SCR_ERROR, ahci_scr_read(ap, SCR_ERROR));
1028 ahci_start_engine(port_mmio);
1030 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1032 /* vt8251 doesn't clear BSY on signature FIS reception,
1033 * request follow-up softreset.
1035 return rc ?: -EAGAIN;
1038 static void ahci_postreset(struct ata_port *ap, unsigned int *class)
1040 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1043 ata_std_postreset(ap, class);
1045 /* Make sure port's ATAPI bit is set appropriately */
1046 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1047 if (*class == ATA_DEV_ATAPI)
1048 new_tmp |= PORT_CMD_ATAPI;
1050 new_tmp &= ~PORT_CMD_ATAPI;
1051 if (new_tmp != tmp) {
1052 writel(new_tmp, port_mmio + PORT_CMD);
1053 readl(port_mmio + PORT_CMD); /* flush */
1057 static u8 ahci_check_status(struct ata_port *ap)
1059 void __iomem *mmio = ap->ioaddr.cmd_addr;
1061 return readl(mmio + PORT_TFDATA) & 0xFF;
1064 static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
1066 struct ahci_port_priv *pp = ap->private_data;
1067 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1069 ata_tf_from_fis(d2h_fis, tf);
1072 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1074 struct scatterlist *sg;
1075 struct ahci_sg *ahci_sg;
1076 unsigned int n_sg = 0;
1081 * Next, the S/G list.
1083 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1084 ata_for_each_sg(sg, qc) {
1085 dma_addr_t addr = sg_dma_address(sg);
1086 u32 sg_len = sg_dma_len(sg);
1088 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1089 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1090 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
1099 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1101 struct ata_port *ap = qc->ap;
1102 struct ahci_port_priv *pp = ap->private_data;
1103 int is_atapi = is_atapi_taskfile(&qc->tf);
1106 const u32 cmd_fis_len = 5; /* five dwords */
1107 unsigned int n_elem;
1110 * Fill in command table information. First, the header,
1111 * a SATA Register - Host to Device command FIS.
1113 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1115 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
1117 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1118 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1122 if (qc->flags & ATA_QCFLAG_DMAMAP)
1123 n_elem = ahci_fill_sg(qc, cmd_tbl);
1126 * Fill in command slot information.
1128 opts = cmd_fis_len | n_elem << 16;
1129 if (qc->tf.flags & ATA_TFLAG_WRITE)
1130 opts |= AHCI_CMD_WRITE;
1132 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1134 ahci_fill_cmd_slot(pp, qc->tag, opts);
1137 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1139 struct ahci_port_priv *pp = ap->private_data;
1140 struct ata_eh_info *ehi = &ap->eh_info;
1141 unsigned int err_mask = 0, action = 0;
1142 struct ata_queued_cmd *qc;
1145 ata_ehi_clear_desc(ehi);
1147 /* AHCI needs SError cleared; otherwise, it might lock up */
1148 serror = ahci_scr_read(ap, SCR_ERROR);
1149 ahci_scr_write(ap, SCR_ERROR, serror);
1151 /* analyze @irq_stat */
1152 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1154 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1155 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1156 irq_stat &= ~PORT_IRQ_IF_ERR;
1158 if (irq_stat & PORT_IRQ_TF_ERR) {
1159 err_mask |= AC_ERR_DEV;
1160 if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
1161 serror &= ~SERR_INTERNAL;
1164 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1165 err_mask |= AC_ERR_HOST_BUS;
1166 action |= ATA_EH_SOFTRESET;
1169 if (irq_stat & PORT_IRQ_IF_ERR) {
1170 err_mask |= AC_ERR_ATA_BUS;
1171 action |= ATA_EH_SOFTRESET;
1172 ata_ehi_push_desc(ehi, ", interface fatal error");
1175 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1176 ata_ehi_hotplugged(ehi);
1177 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
1178 "connection status changed" : "PHY RDY changed");
1181 if (irq_stat & PORT_IRQ_UNK_FIS) {
1182 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1184 err_mask |= AC_ERR_HSM;
1185 action |= ATA_EH_SOFTRESET;
1186 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
1187 unk[0], unk[1], unk[2], unk[3]);
1190 /* okay, let's hand over to EH */
1191 ehi->serror |= serror;
1192 ehi->action |= action;
1194 qc = ata_qc_from_tag(ap, ap->active_tag);
1196 qc->err_mask |= err_mask;
1198 ehi->err_mask |= err_mask;
1200 if (irq_stat & PORT_IRQ_FREEZE)
1201 ata_port_freeze(ap);
1206 static void ahci_host_intr(struct ata_port *ap)
1208 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1209 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1210 struct ata_eh_info *ehi = &ap->eh_info;
1211 struct ahci_port_priv *pp = ap->private_data;
1212 u32 status, qc_active;
1213 int rc, known_irq = 0;
1215 status = readl(port_mmio + PORT_IRQ_STAT);
1216 writel(status, port_mmio + PORT_IRQ_STAT);
1218 if (unlikely(status & PORT_IRQ_ERROR)) {
1219 ahci_error_intr(ap, status);
1224 qc_active = readl(port_mmio + PORT_SCR_ACT);
1226 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1228 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1232 ehi->err_mask |= AC_ERR_HSM;
1233 ehi->action |= ATA_EH_SOFTRESET;
1234 ata_port_freeze(ap);
1238 /* hmmm... a spurious interupt */
1240 /* if !NCQ, ignore. No modern ATA device has broken HSM
1241 * implementation for non-NCQ commands.
1246 if (status & PORT_IRQ_D2H_REG_FIS) {
1247 if (!pp->ncq_saw_d2h)
1248 ata_port_printk(ap, KERN_INFO,
1249 "D2H reg with I during NCQ, "
1250 "this message won't be printed again\n");
1251 pp->ncq_saw_d2h = 1;
1255 if (status & PORT_IRQ_DMAS_FIS) {
1256 if (!pp->ncq_saw_dmas)
1257 ata_port_printk(ap, KERN_INFO,
1258 "DMAS FIS during NCQ, "
1259 "this message won't be printed again\n");
1260 pp->ncq_saw_dmas = 1;
1264 if (status & PORT_IRQ_SDB_FIS) {
1265 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1267 if (le32_to_cpu(f[1])) {
1268 /* SDB FIS containing spurious completions
1269 * might be dangerous, whine and fail commands
1270 * with HSM violation. EH will turn off NCQ
1271 * after several such failures.
1273 ata_ehi_push_desc(ehi,
1274 "spurious completions during NCQ "
1275 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1276 readl(port_mmio + PORT_CMD_ISSUE),
1277 readl(port_mmio + PORT_SCR_ACT),
1278 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1279 ehi->err_mask |= AC_ERR_HSM;
1280 ehi->action |= ATA_EH_SOFTRESET;
1281 ata_port_freeze(ap);
1283 if (!pp->ncq_saw_sdb)
1284 ata_port_printk(ap, KERN_INFO,
1285 "spurious SDB FIS %08x:%08x during NCQ, "
1286 "this message won't be printed again\n",
1287 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1288 pp->ncq_saw_sdb = 1;
1294 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
1295 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1296 status, ap->active_tag, ap->sactive);
1299 static void ahci_irq_clear(struct ata_port *ap)
1304 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1306 struct ata_host *host = dev_instance;
1307 struct ahci_host_priv *hpriv;
1308 unsigned int i, handled = 0;
1310 u32 irq_stat, irq_ack = 0;
1314 hpriv = host->private_data;
1315 mmio = host->iomap[AHCI_PCI_BAR];
1317 /* sigh. 0xffffffff is a valid return from h/w */
1318 irq_stat = readl(mmio + HOST_IRQ_STAT);
1319 irq_stat &= hpriv->port_map;
1323 spin_lock(&host->lock);
1325 for (i = 0; i < host->n_ports; i++) {
1326 struct ata_port *ap;
1328 if (!(irq_stat & (1 << i)))
1331 ap = host->ports[i];
1334 VPRINTK("port %u\n", i);
1336 VPRINTK("port %u (no irq)\n", i);
1337 if (ata_ratelimit())
1338 dev_printk(KERN_WARNING, host->dev,
1339 "interrupt on disabled port %u\n", i);
1342 irq_ack |= (1 << i);
1346 writel(irq_ack, mmio + HOST_IRQ_STAT);
1350 spin_unlock(&host->lock);
1354 return IRQ_RETVAL(handled);
1357 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1359 struct ata_port *ap = qc->ap;
1360 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1362 if (qc->tf.protocol == ATA_PROT_NCQ)
1363 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1364 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1365 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1370 static void ahci_freeze(struct ata_port *ap)
1372 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1373 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1376 writel(0, port_mmio + PORT_IRQ_MASK);
1379 static void ahci_thaw(struct ata_port *ap)
1381 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1382 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1386 tmp = readl(port_mmio + PORT_IRQ_STAT);
1387 writel(tmp, port_mmio + PORT_IRQ_STAT);
1388 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1390 /* turn IRQ back on */
1391 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1394 static void ahci_error_handler(struct ata_port *ap)
1396 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1397 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1399 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1400 /* restart engine */
1401 ahci_stop_engine(port_mmio);
1402 ahci_start_engine(port_mmio);
1405 /* perform recovery */
1406 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
1410 static void ahci_vt8251_error_handler(struct ata_port *ap)
1412 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1413 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1415 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1416 /* restart engine */
1417 ahci_stop_engine(port_mmio);
1418 ahci_start_engine(port_mmio);
1421 /* perform recovery */
1422 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1426 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1428 struct ata_port *ap = qc->ap;
1429 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1430 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1432 if (qc->flags & ATA_QCFLAG_FAILED) {
1433 /* make DMA engine forget about the failed command */
1434 ahci_stop_engine(port_mmio);
1435 ahci_start_engine(port_mmio);
1440 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1442 struct ahci_host_priv *hpriv = ap->host->private_data;
1443 struct ahci_port_priv *pp = ap->private_data;
1444 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1445 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1446 const char *emsg = NULL;
1449 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1451 ahci_power_down(port_mmio, hpriv->cap);
1453 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1454 ahci_init_port(port_mmio, hpriv->cap,
1455 pp->cmd_slot_dma, pp->rx_fis_dma);
1461 static int ahci_port_resume(struct ata_port *ap)
1463 struct ahci_port_priv *pp = ap->private_data;
1464 struct ahci_host_priv *hpriv = ap->host->private_data;
1465 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1466 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1468 ahci_power_up(port_mmio, hpriv->cap);
1469 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1474 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1476 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1477 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1480 if (mesg.event == PM_EVENT_SUSPEND) {
1481 /* AHCI spec rev1.1 section 8.3.3:
1482 * Software must disable interrupts prior to requesting a
1483 * transition of the HBA to D3 state.
1485 ctl = readl(mmio + HOST_CTL);
1486 ctl &= ~HOST_IRQ_EN;
1487 writel(ctl, mmio + HOST_CTL);
1488 readl(mmio + HOST_CTL); /* flush */
1491 return ata_pci_device_suspend(pdev, mesg);
1494 static int ahci_pci_device_resume(struct pci_dev *pdev)
1496 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1497 struct ahci_host_priv *hpriv = host->private_data;
1498 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1501 rc = ata_pci_device_do_resume(pdev);
1505 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1506 rc = ahci_reset_controller(mmio, pdev, hpriv);
1510 ahci_init_controller(mmio, pdev, host->n_ports,
1511 host->ports[0]->flags, hpriv);
1514 ata_host_resume(host);
1520 static int ahci_port_start(struct ata_port *ap)
1522 struct device *dev = ap->host->dev;
1523 struct ahci_host_priv *hpriv = ap->host->private_data;
1524 struct ahci_port_priv *pp;
1525 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1526 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1531 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1535 rc = ata_pad_alloc(ap, dev);
1539 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1543 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1546 * First item in chunk of DMA memory: 32-slot command table,
1547 * 32 bytes each in size
1550 pp->cmd_slot_dma = mem_dma;
1552 mem += AHCI_CMD_SLOT_SZ;
1553 mem_dma += AHCI_CMD_SLOT_SZ;
1556 * Second item: Received-FIS area
1559 pp->rx_fis_dma = mem_dma;
1561 mem += AHCI_RX_FIS_SZ;
1562 mem_dma += AHCI_RX_FIS_SZ;
1565 * Third item: data area for storing a single command
1566 * and its scatter-gather table
1569 pp->cmd_tbl_dma = mem_dma;
1571 ap->private_data = pp;
1574 ahci_power_up(port_mmio, hpriv->cap);
1576 /* initialize port */
1577 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1582 static void ahci_port_stop(struct ata_port *ap)
1584 struct ahci_host_priv *hpriv = ap->host->private_data;
1585 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1586 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1587 const char *emsg = NULL;
1590 /* de-initialize port */
1591 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1593 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1596 static void ahci_setup_port(struct ata_ioports *port, void __iomem *base,
1597 unsigned int port_idx)
1599 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
1600 base = ahci_port_base(base, port_idx);
1601 VPRINTK("base now==0x%lx\n", base);
1603 port->cmd_addr = base;
1604 port->scr_addr = base + PORT_SCR;
1609 static int ahci_host_init(struct ata_probe_ent *probe_ent)
1611 struct ahci_host_priv *hpriv = probe_ent->private_data;
1612 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1613 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
1614 unsigned int i, using_dac;
1617 rc = ahci_reset_controller(mmio, pdev, hpriv);
1621 probe_ent->n_ports = fls(hpriv->port_map);
1622 probe_ent->dummy_port_mask = ~hpriv->port_map;
1624 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1625 hpriv->cap, hpriv->port_map, probe_ent->n_ports);
1627 using_dac = hpriv->cap & HOST_CAP_64;
1629 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1630 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1632 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1634 dev_printk(KERN_ERR, &pdev->dev,
1635 "64-bit DMA enable failed\n");
1640 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1642 dev_printk(KERN_ERR, &pdev->dev,
1643 "32-bit DMA enable failed\n");
1646 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1648 dev_printk(KERN_ERR, &pdev->dev,
1649 "32-bit consistent DMA enable failed\n");
1654 for (i = 0; i < probe_ent->n_ports; i++)
1655 ahci_setup_port(&probe_ent->port[i], mmio, i);
1657 ahci_init_controller(mmio, pdev, probe_ent->n_ports,
1658 probe_ent->port_flags, hpriv);
1660 pci_set_master(pdev);
1665 static void ahci_print_info(struct ata_probe_ent *probe_ent)
1667 struct ahci_host_priv *hpriv = probe_ent->private_data;
1668 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
1669 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
1670 u32 vers, cap, impl, speed;
1671 const char *speed_s;
1675 vers = readl(mmio + HOST_VERSION);
1677 impl = hpriv->port_map;
1679 speed = (cap >> 20) & 0xf;
1682 else if (speed == 2)
1687 pci_read_config_word(pdev, 0x0a, &cc);
1688 if (cc == PCI_CLASS_STORAGE_IDE)
1690 else if (cc == PCI_CLASS_STORAGE_SATA)
1692 else if (cc == PCI_CLASS_STORAGE_RAID)
1697 dev_printk(KERN_INFO, &pdev->dev,
1698 "AHCI %02x%02x.%02x%02x "
1699 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1702 (vers >> 24) & 0xff,
1703 (vers >> 16) & 0xff,
1707 ((cap >> 8) & 0x1f) + 1,
1713 dev_printk(KERN_INFO, &pdev->dev,
1719 cap & (1 << 31) ? "64bit " : "",
1720 cap & (1 << 30) ? "ncq " : "",
1721 cap & (1 << 28) ? "ilck " : "",
1722 cap & (1 << 27) ? "stag " : "",
1723 cap & (1 << 26) ? "pm " : "",
1724 cap & (1 << 25) ? "led " : "",
1726 cap & (1 << 24) ? "clo " : "",
1727 cap & (1 << 19) ? "nz " : "",
1728 cap & (1 << 18) ? "only " : "",
1729 cap & (1 << 17) ? "pmp " : "",
1730 cap & (1 << 15) ? "pio " : "",
1731 cap & (1 << 14) ? "slum " : "",
1732 cap & (1 << 13) ? "part " : ""
1736 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1738 static int printed_version;
1739 unsigned int board_idx = (unsigned int) ent->driver_data;
1740 struct device *dev = &pdev->dev;
1741 struct ata_probe_ent *probe_ent;
1742 struct ahci_host_priv *hpriv;
1747 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1749 if (!printed_version++)
1750 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1752 rc = pcim_enable_device(pdev);
1756 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1758 pcim_pin_device(pdev);
1762 if (pci_enable_msi(pdev))
1765 probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
1766 if (probe_ent == NULL)
1769 probe_ent->dev = pci_dev_to_dev(pdev);
1770 INIT_LIST_HEAD(&probe_ent->node);
1772 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1776 probe_ent->sht = ahci_port_info[board_idx].sht;
1777 probe_ent->port_flags = ahci_port_info[board_idx].flags;
1778 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1779 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1780 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1782 probe_ent->irq = pdev->irq;
1783 probe_ent->irq_flags = IRQF_SHARED;
1784 probe_ent->iomap = pcim_iomap_table(pdev);
1785 probe_ent->private_data = hpriv;
1787 /* initialize adapter */
1788 ahci_save_initial_config(probe_ent);
1790 rc = ahci_host_init(probe_ent);
1794 if (!(probe_ent->port_flags & AHCI_FLAG_NO_NCQ) &&
1795 (hpriv->cap & HOST_CAP_NCQ))
1796 probe_ent->port_flags |= ATA_FLAG_NCQ;
1798 ahci_print_info(probe_ent);
1800 if (!ata_device_add(probe_ent))
1803 devm_kfree(dev, probe_ent);
1807 static int __init ahci_init(void)
1809 return pci_register_driver(&ahci_pci_driver);
1812 static void __exit ahci_exit(void)
1814 pci_unregister_driver(&ahci_pci_driver);
1818 MODULE_AUTHOR("Jeff Garzik");
1819 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1820 MODULE_LICENSE("GPL");
1821 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
1822 MODULE_VERSION(DRV_VERSION);
1824 module_init(ahci_init);
1825 module_exit(ahci_exit);