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
];
503 /* Values prefixed with saved_ are written back to host after
504 * reset. Values without are used for driver operation.
506 hpriv
->saved_cap
= cap
= readl(mmio
+ HOST_CAP
);
507 hpriv
->saved_port_map
= port_map
= readl(mmio
+ HOST_PORTS_IMPL
);
509 /* fixup zero port_map */
511 port_map
= (1 << ahci_nr_ports(hpriv
->cap
)) - 1;
512 dev_printk(KERN_WARNING
, probe_ent
->dev
,
513 "PORTS_IMPL is zero, forcing 0x%x\n", port_map
);
515 /* write the fixed up value to the PI register */
516 hpriv
->saved_port_map
= port_map
;
519 /* cross check port_map and cap.n_ports */
520 if (probe_ent
->port_flags
& AHCI_FLAG_HONOR_PI
) {
521 u32 tmp_port_map
= port_map
;
522 int n_ports
= ahci_nr_ports(cap
);
524 for (i
= 0; i
< AHCI_MAX_PORTS
&& n_ports
; i
++) {
525 if (tmp_port_map
& (1 << i
)) {
527 tmp_port_map
&= ~(1 << i
);
531 /* Whine if inconsistent. No need to update cap.
532 * port_map is used to determine number of ports.
534 if (n_ports
|| tmp_port_map
)
535 dev_printk(KERN_WARNING
, probe_ent
->dev
,
536 "nr_ports (%u) and implemented port map "
537 "(0x%x) don't match\n",
538 ahci_nr_ports(cap
), port_map
);
540 /* fabricate port_map from cap.nr_ports */
541 port_map
= (1 << ahci_nr_ports(cap
)) - 1;
544 /* record values to use during operation */
546 hpriv
->port_map
= port_map
;
550 * ahci_restore_initial_config - Restore initial config
551 * @mmio: MMIO base for the host
552 * @hpriv: host private data
554 * Restore initial config stored by ahci_save_initial_config().
559 static void ahci_restore_initial_config(void __iomem
*mmio
,
560 struct ahci_host_priv
*hpriv
)
562 writel(hpriv
->saved_cap
, mmio
+ HOST_CAP
);
563 writel(hpriv
->saved_port_map
, mmio
+ HOST_PORTS_IMPL
);
564 (void) readl(mmio
+ HOST_PORTS_IMPL
); /* flush */
567 static u32
ahci_scr_read (struct ata_port
*ap
, unsigned int sc_reg_in
)
572 case SCR_STATUS
: sc_reg
= 0; break;
573 case SCR_CONTROL
: sc_reg
= 1; break;
574 case SCR_ERROR
: sc_reg
= 2; break;
575 case SCR_ACTIVE
: sc_reg
= 3; break;
580 return readl(ap
->ioaddr
.scr_addr
+ (sc_reg
* 4));
584 static void ahci_scr_write (struct ata_port
*ap
, unsigned int sc_reg_in
,
590 case SCR_STATUS
: sc_reg
= 0; break;
591 case SCR_CONTROL
: sc_reg
= 1; break;
592 case SCR_ERROR
: sc_reg
= 2; break;
593 case SCR_ACTIVE
: sc_reg
= 3; break;
598 writel(val
, ap
->ioaddr
.scr_addr
+ (sc_reg
* 4));
601 static void ahci_start_engine(void __iomem
*port_mmio
)
606 tmp
= readl(port_mmio
+ PORT_CMD
);
607 tmp
|= PORT_CMD_START
;
608 writel(tmp
, port_mmio
+ PORT_CMD
);
609 readl(port_mmio
+ PORT_CMD
); /* flush */
612 static int ahci_stop_engine(void __iomem
*port_mmio
)
616 tmp
= readl(port_mmio
+ PORT_CMD
);
618 /* check if the HBA is idle */
619 if ((tmp
& (PORT_CMD_START
| PORT_CMD_LIST_ON
)) == 0)
622 /* setting HBA to idle */
623 tmp
&= ~PORT_CMD_START
;
624 writel(tmp
, port_mmio
+ PORT_CMD
);
626 /* wait for engine to stop. This could be as long as 500 msec */
627 tmp
= ata_wait_register(port_mmio
+ PORT_CMD
,
628 PORT_CMD_LIST_ON
, PORT_CMD_LIST_ON
, 1, 500);
629 if (tmp
& PORT_CMD_LIST_ON
)
635 static void ahci_start_fis_rx(void __iomem
*port_mmio
, u32 cap
,
636 dma_addr_t cmd_slot_dma
, dma_addr_t rx_fis_dma
)
640 /* set FIS registers */
641 if (cap
& HOST_CAP_64
)
642 writel((cmd_slot_dma
>> 16) >> 16, port_mmio
+ PORT_LST_ADDR_HI
);
643 writel(cmd_slot_dma
& 0xffffffff, port_mmio
+ PORT_LST_ADDR
);
645 if (cap
& HOST_CAP_64
)
646 writel((rx_fis_dma
>> 16) >> 16, port_mmio
+ PORT_FIS_ADDR_HI
);
647 writel(rx_fis_dma
& 0xffffffff, port_mmio
+ PORT_FIS_ADDR
);
649 /* enable FIS reception */
650 tmp
= readl(port_mmio
+ PORT_CMD
);
651 tmp
|= PORT_CMD_FIS_RX
;
652 writel(tmp
, port_mmio
+ PORT_CMD
);
655 readl(port_mmio
+ PORT_CMD
);
658 static int ahci_stop_fis_rx(void __iomem
*port_mmio
)
662 /* disable FIS reception */
663 tmp
= readl(port_mmio
+ PORT_CMD
);
664 tmp
&= ~PORT_CMD_FIS_RX
;
665 writel(tmp
, port_mmio
+ PORT_CMD
);
667 /* wait for completion, spec says 500ms, give it 1000 */
668 tmp
= ata_wait_register(port_mmio
+ PORT_CMD
, PORT_CMD_FIS_ON
,
669 PORT_CMD_FIS_ON
, 10, 1000);
670 if (tmp
& PORT_CMD_FIS_ON
)
676 static void ahci_power_up(void __iomem
*port_mmio
, u32 cap
)
680 cmd
= readl(port_mmio
+ PORT_CMD
) & ~PORT_CMD_ICC_MASK
;
683 if (cap
& HOST_CAP_SSS
) {
684 cmd
|= PORT_CMD_SPIN_UP
;
685 writel(cmd
, port_mmio
+ PORT_CMD
);
689 writel(cmd
| PORT_CMD_ICC_ACTIVE
, port_mmio
+ PORT_CMD
);
693 static void ahci_power_down(void __iomem
*port_mmio
, u32 cap
)
697 if (!(cap
& HOST_CAP_SSS
))
700 /* put device into listen mode, first set PxSCTL.DET to 0 */
701 scontrol
= readl(port_mmio
+ PORT_SCR_CTL
);
703 writel(scontrol
, port_mmio
+ PORT_SCR_CTL
);
705 /* then set PxCMD.SUD to 0 */
706 cmd
= readl(port_mmio
+ PORT_CMD
) & ~PORT_CMD_ICC_MASK
;
707 cmd
&= ~PORT_CMD_SPIN_UP
;
708 writel(cmd
, port_mmio
+ PORT_CMD
);
712 static void ahci_init_port(void __iomem
*port_mmio
, u32 cap
,
713 dma_addr_t cmd_slot_dma
, dma_addr_t rx_fis_dma
)
715 /* enable FIS reception */
716 ahci_start_fis_rx(port_mmio
, cap
, cmd_slot_dma
, rx_fis_dma
);
719 ahci_start_engine(port_mmio
);
722 static int ahci_deinit_port(void __iomem
*port_mmio
, u32 cap
, const char **emsg
)
727 rc
= ahci_stop_engine(port_mmio
);
729 *emsg
= "failed to stop engine";
733 /* disable FIS reception */
734 rc
= ahci_stop_fis_rx(port_mmio
);
736 *emsg
= "failed stop FIS RX";
743 static int ahci_reset_controller(void __iomem
*mmio
, struct pci_dev
*pdev
,
744 struct ahci_host_priv
*hpriv
)
748 /* global controller reset */
749 tmp
= readl(mmio
+ HOST_CTL
);
750 if ((tmp
& HOST_RESET
) == 0) {
751 writel(tmp
| HOST_RESET
, mmio
+ HOST_CTL
);
752 readl(mmio
+ HOST_CTL
); /* flush */
755 /* reset must complete within 1 second, or
756 * the hardware should be considered fried.
760 tmp
= readl(mmio
+ HOST_CTL
);
761 if (tmp
& HOST_RESET
) {
762 dev_printk(KERN_ERR
, &pdev
->dev
,
763 "controller reset failed (0x%x)\n", tmp
);
767 /* turn on AHCI mode */
768 writel(HOST_AHCI_EN
, mmio
+ HOST_CTL
);
769 (void) readl(mmio
+ HOST_CTL
); /* flush */
771 /* some registers might be cleared on reset. restore initial values */
772 ahci_restore_initial_config(mmio
, hpriv
);
774 if (pdev
->vendor
== PCI_VENDOR_ID_INTEL
) {
778 pci_read_config_word(pdev
, 0x92, &tmp16
);
780 pci_write_config_word(pdev
, 0x92, tmp16
);
786 static void ahci_init_controller(void __iomem
*mmio
, struct pci_dev
*pdev
,
787 int n_ports
, unsigned int port_flags
,
788 struct ahci_host_priv
*hpriv
)
793 for (i
= 0; i
< n_ports
; i
++) {
794 void __iomem
*port_mmio
= ahci_port_base(mmio
, i
);
795 const char *emsg
= NULL
;
797 if ((port_flags
& AHCI_FLAG_HONOR_PI
) &&
798 !(hpriv
->port_map
& (1 << i
)))
801 /* make sure port is not active */
802 rc
= ahci_deinit_port(port_mmio
, hpriv
->cap
, &emsg
);
804 dev_printk(KERN_WARNING
, &pdev
->dev
,
805 "%s (%d)\n", emsg
, rc
);
808 tmp
= readl(port_mmio
+ PORT_SCR_ERR
);
809 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp
);
810 writel(tmp
, port_mmio
+ PORT_SCR_ERR
);
813 tmp
= readl(port_mmio
+ PORT_IRQ_STAT
);
814 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp
);
816 writel(tmp
, port_mmio
+ PORT_IRQ_STAT
);
818 writel(1 << i
, mmio
+ HOST_IRQ_STAT
);
821 tmp
= readl(mmio
+ HOST_CTL
);
822 VPRINTK("HOST_CTL 0x%x\n", tmp
);
823 writel(tmp
| HOST_IRQ_EN
, mmio
+ HOST_CTL
);
824 tmp
= readl(mmio
+ HOST_CTL
);
825 VPRINTK("HOST_CTL 0x%x\n", tmp
);
828 static unsigned int ahci_dev_classify(struct ata_port
*ap
)
830 void __iomem
*port_mmio
= ap
->ioaddr
.cmd_addr
;
831 struct ata_taskfile tf
;
834 tmp
= readl(port_mmio
+ PORT_SIG
);
835 tf
.lbah
= (tmp
>> 24) & 0xff;
836 tf
.lbam
= (tmp
>> 16) & 0xff;
837 tf
.lbal
= (tmp
>> 8) & 0xff;
838 tf
.nsect
= (tmp
) & 0xff;
840 return ata_dev_classify(&tf
);
843 static void ahci_fill_cmd_slot(struct ahci_port_priv
*pp
, unsigned int tag
,
846 dma_addr_t cmd_tbl_dma
;
848 cmd_tbl_dma
= pp
->cmd_tbl_dma
+ tag
* AHCI_CMD_TBL_SZ
;
850 pp
->cmd_slot
[tag
].opts
= cpu_to_le32(opts
);
851 pp
->cmd_slot
[tag
].status
= 0;
852 pp
->cmd_slot
[tag
].tbl_addr
= cpu_to_le32(cmd_tbl_dma
& 0xffffffff);
853 pp
->cmd_slot
[tag
].tbl_addr_hi
= cpu_to_le32((cmd_tbl_dma
>> 16) >> 16);
856 static int ahci_clo(struct ata_port
*ap
)
858 void __iomem
*port_mmio
= ap
->ioaddr
.cmd_addr
;
859 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
862 if (!(hpriv
->cap
& HOST_CAP_CLO
))
865 tmp
= readl(port_mmio
+ PORT_CMD
);
867 writel(tmp
, port_mmio
+ PORT_CMD
);
869 tmp
= ata_wait_register(port_mmio
+ PORT_CMD
,
870 PORT_CMD_CLO
, PORT_CMD_CLO
, 1, 500);
871 if (tmp
& PORT_CMD_CLO
)
877 static int ahci_softreset(struct ata_port
*ap
, unsigned int *class)
879 struct ahci_port_priv
*pp
= ap
->private_data
;
880 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
881 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
882 const u32 cmd_fis_len
= 5; /* five dwords */
883 const char *reason
= NULL
;
884 struct ata_taskfile tf
;
891 if (ata_port_offline(ap
)) {
892 DPRINTK("PHY reports no device\n");
893 *class = ATA_DEV_NONE
;
897 /* prepare for SRST (AHCI-1.1 10.4.1) */
898 rc
= ahci_stop_engine(port_mmio
);
900 reason
= "failed to stop engine";
904 /* check BUSY/DRQ, perform Command List Override if necessary */
905 if (ahci_check_status(ap
) & (ATA_BUSY
| ATA_DRQ
)) {
908 if (rc
== -EOPNOTSUPP
) {
909 reason
= "port busy but CLO unavailable";
912 reason
= "port busy but CLO failed";
918 ahci_start_engine(port_mmio
);
920 ata_tf_init(ap
->device
, &tf
);
923 /* issue the first D2H Register FIS */
924 ahci_fill_cmd_slot(pp
, 0,
925 cmd_fis_len
| AHCI_CMD_RESET
| AHCI_CMD_CLR_BUSY
);
928 ata_tf_to_fis(&tf
, fis
, 0);
929 fis
[1] &= ~(1 << 7); /* turn off Command FIS bit */
931 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
933 tmp
= ata_wait_register(port_mmio
+ PORT_CMD_ISSUE
, 0x1, 0x1, 1, 500);
936 reason
= "1st FIS failed";
940 /* spec says at least 5us, but be generous and sleep for 1ms */
943 /* issue the second D2H Register FIS */
944 ahci_fill_cmd_slot(pp
, 0, cmd_fis_len
);
947 ata_tf_to_fis(&tf
, fis
, 0);
948 fis
[1] &= ~(1 << 7); /* turn off Command FIS bit */
950 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
951 readl(port_mmio
+ PORT_CMD_ISSUE
); /* flush */
953 /* spec mandates ">= 2ms" before checking status.
954 * We wait 150ms, because that was the magic delay used for
955 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
956 * between when the ATA command register is written, and then
957 * status is checked. Because waiting for "a while" before
958 * checking status is fine, post SRST, we perform this magic
959 * delay here as well.
963 *class = ATA_DEV_NONE
;
964 if (ata_port_online(ap
)) {
965 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
967 reason
= "device not ready";
970 *class = ahci_dev_classify(ap
);
973 DPRINTK("EXIT, class=%u\n", *class);
977 ahci_start_engine(port_mmio
);
979 ata_port_printk(ap
, KERN_ERR
, "softreset failed (%s)\n", reason
);
983 static int ahci_hardreset(struct ata_port
*ap
, unsigned int *class)
985 struct ahci_port_priv
*pp
= ap
->private_data
;
986 u8
*d2h_fis
= pp
->rx_fis
+ RX_FIS_D2H_REG
;
987 struct ata_taskfile tf
;
988 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
989 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
994 ahci_stop_engine(port_mmio
);
996 /* clear D2H reception area to properly wait for D2H FIS */
997 ata_tf_init(ap
->device
, &tf
);
999 ata_tf_to_fis(&tf
, d2h_fis
, 0);
1001 rc
= sata_std_hardreset(ap
, class);
1003 ahci_start_engine(port_mmio
);
1005 if (rc
== 0 && ata_port_online(ap
))
1006 *class = ahci_dev_classify(ap
);
1007 if (*class == ATA_DEV_UNKNOWN
)
1008 *class = ATA_DEV_NONE
;
1010 DPRINTK("EXIT, rc=%d, class=%u\n", rc
, *class);
1014 static int ahci_vt8251_hardreset(struct ata_port
*ap
, unsigned int *class)
1016 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1017 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1022 ahci_stop_engine(port_mmio
);
1024 rc
= sata_port_hardreset(ap
, sata_ehc_deb_timing(&ap
->eh_context
));
1026 /* vt8251 needs SError cleared for the port to operate */
1027 ahci_scr_write(ap
, SCR_ERROR
, ahci_scr_read(ap
, SCR_ERROR
));
1029 ahci_start_engine(port_mmio
);
1031 DPRINTK("EXIT, rc=%d, class=%u\n", rc
, *class);
1033 /* vt8251 doesn't clear BSY on signature FIS reception,
1034 * request follow-up softreset.
1036 return rc
?: -EAGAIN
;
1039 static void ahci_postreset(struct ata_port
*ap
, unsigned int *class)
1041 void __iomem
*port_mmio
= ap
->ioaddr
.cmd_addr
;
1044 ata_std_postreset(ap
, class);
1046 /* Make sure port's ATAPI bit is set appropriately */
1047 new_tmp
= tmp
= readl(port_mmio
+ PORT_CMD
);
1048 if (*class == ATA_DEV_ATAPI
)
1049 new_tmp
|= PORT_CMD_ATAPI
;
1051 new_tmp
&= ~PORT_CMD_ATAPI
;
1052 if (new_tmp
!= tmp
) {
1053 writel(new_tmp
, port_mmio
+ PORT_CMD
);
1054 readl(port_mmio
+ PORT_CMD
); /* flush */
1058 static u8
ahci_check_status(struct ata_port
*ap
)
1060 void __iomem
*mmio
= ap
->ioaddr
.cmd_addr
;
1062 return readl(mmio
+ PORT_TFDATA
) & 0xFF;
1065 static void ahci_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
)
1067 struct ahci_port_priv
*pp
= ap
->private_data
;
1068 u8
*d2h_fis
= pp
->rx_fis
+ RX_FIS_D2H_REG
;
1070 ata_tf_from_fis(d2h_fis
, tf
);
1073 static unsigned int ahci_fill_sg(struct ata_queued_cmd
*qc
, void *cmd_tbl
)
1075 struct scatterlist
*sg
;
1076 struct ahci_sg
*ahci_sg
;
1077 unsigned int n_sg
= 0;
1082 * Next, the S/G list.
1084 ahci_sg
= cmd_tbl
+ AHCI_CMD_TBL_HDR_SZ
;
1085 ata_for_each_sg(sg
, qc
) {
1086 dma_addr_t addr
= sg_dma_address(sg
);
1087 u32 sg_len
= sg_dma_len(sg
);
1089 ahci_sg
->addr
= cpu_to_le32(addr
& 0xffffffff);
1090 ahci_sg
->addr_hi
= cpu_to_le32((addr
>> 16) >> 16);
1091 ahci_sg
->flags_size
= cpu_to_le32(sg_len
- 1);
1100 static void ahci_qc_prep(struct ata_queued_cmd
*qc
)
1102 struct ata_port
*ap
= qc
->ap
;
1103 struct ahci_port_priv
*pp
= ap
->private_data
;
1104 int is_atapi
= is_atapi_taskfile(&qc
->tf
);
1107 const u32 cmd_fis_len
= 5; /* five dwords */
1108 unsigned int n_elem
;
1111 * Fill in command table information. First, the header,
1112 * a SATA Register - Host to Device command FIS.
1114 cmd_tbl
= pp
->cmd_tbl
+ qc
->tag
* AHCI_CMD_TBL_SZ
;
1116 ata_tf_to_fis(&qc
->tf
, cmd_tbl
, 0);
1118 memset(cmd_tbl
+ AHCI_CMD_TBL_CDB
, 0, 32);
1119 memcpy(cmd_tbl
+ AHCI_CMD_TBL_CDB
, qc
->cdb
, qc
->dev
->cdb_len
);
1123 if (qc
->flags
& ATA_QCFLAG_DMAMAP
)
1124 n_elem
= ahci_fill_sg(qc
, cmd_tbl
);
1127 * Fill in command slot information.
1129 opts
= cmd_fis_len
| n_elem
<< 16;
1130 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
1131 opts
|= AHCI_CMD_WRITE
;
1133 opts
|= AHCI_CMD_ATAPI
| AHCI_CMD_PREFETCH
;
1135 ahci_fill_cmd_slot(pp
, qc
->tag
, opts
);
1138 static void ahci_error_intr(struct ata_port
*ap
, u32 irq_stat
)
1140 struct ahci_port_priv
*pp
= ap
->private_data
;
1141 struct ata_eh_info
*ehi
= &ap
->eh_info
;
1142 unsigned int err_mask
= 0, action
= 0;
1143 struct ata_queued_cmd
*qc
;
1146 ata_ehi_clear_desc(ehi
);
1148 /* AHCI needs SError cleared; otherwise, it might lock up */
1149 serror
= ahci_scr_read(ap
, SCR_ERROR
);
1150 ahci_scr_write(ap
, SCR_ERROR
, serror
);
1152 /* analyze @irq_stat */
1153 ata_ehi_push_desc(ehi
, "irq_stat 0x%08x", irq_stat
);
1155 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1156 if (ap
->flags
& AHCI_FLAG_IGN_IRQ_IF_ERR
)
1157 irq_stat
&= ~PORT_IRQ_IF_ERR
;
1159 if (irq_stat
& PORT_IRQ_TF_ERR
) {
1160 err_mask
|= AC_ERR_DEV
;
1161 if (ap
->flags
& AHCI_FLAG_IGN_SERR_INTERNAL
)
1162 serror
&= ~SERR_INTERNAL
;
1165 if (irq_stat
& (PORT_IRQ_HBUS_ERR
| PORT_IRQ_HBUS_DATA_ERR
)) {
1166 err_mask
|= AC_ERR_HOST_BUS
;
1167 action
|= ATA_EH_SOFTRESET
;
1170 if (irq_stat
& PORT_IRQ_IF_ERR
) {
1171 err_mask
|= AC_ERR_ATA_BUS
;
1172 action
|= ATA_EH_SOFTRESET
;
1173 ata_ehi_push_desc(ehi
, ", interface fatal error");
1176 if (irq_stat
& (PORT_IRQ_CONNECT
| PORT_IRQ_PHYRDY
)) {
1177 ata_ehi_hotplugged(ehi
);
1178 ata_ehi_push_desc(ehi
, ", %s", irq_stat
& PORT_IRQ_CONNECT
?
1179 "connection status changed" : "PHY RDY changed");
1182 if (irq_stat
& PORT_IRQ_UNK_FIS
) {
1183 u32
*unk
= (u32
*)(pp
->rx_fis
+ RX_FIS_UNK
);
1185 err_mask
|= AC_ERR_HSM
;
1186 action
|= ATA_EH_SOFTRESET
;
1187 ata_ehi_push_desc(ehi
, ", unknown FIS %08x %08x %08x %08x",
1188 unk
[0], unk
[1], unk
[2], unk
[3]);
1191 /* okay, let's hand over to EH */
1192 ehi
->serror
|= serror
;
1193 ehi
->action
|= action
;
1195 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
1197 qc
->err_mask
|= err_mask
;
1199 ehi
->err_mask
|= err_mask
;
1201 if (irq_stat
& PORT_IRQ_FREEZE
)
1202 ata_port_freeze(ap
);
1207 static void ahci_host_intr(struct ata_port
*ap
)
1209 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1210 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1211 struct ata_eh_info
*ehi
= &ap
->eh_info
;
1212 struct ahci_port_priv
*pp
= ap
->private_data
;
1213 u32 status
, qc_active
;
1214 int rc
, known_irq
= 0;
1216 status
= readl(port_mmio
+ PORT_IRQ_STAT
);
1217 writel(status
, port_mmio
+ PORT_IRQ_STAT
);
1219 if (unlikely(status
& PORT_IRQ_ERROR
)) {
1220 ahci_error_intr(ap
, status
);
1225 qc_active
= readl(port_mmio
+ PORT_SCR_ACT
);
1227 qc_active
= readl(port_mmio
+ PORT_CMD_ISSUE
);
1229 rc
= ata_qc_complete_multiple(ap
, qc_active
, NULL
);
1233 ehi
->err_mask
|= AC_ERR_HSM
;
1234 ehi
->action
|= ATA_EH_SOFTRESET
;
1235 ata_port_freeze(ap
);
1239 /* hmmm... a spurious interupt */
1241 /* if !NCQ, ignore. No modern ATA device has broken HSM
1242 * implementation for non-NCQ commands.
1247 if (status
& PORT_IRQ_D2H_REG_FIS
) {
1248 if (!pp
->ncq_saw_d2h
)
1249 ata_port_printk(ap
, KERN_INFO
,
1250 "D2H reg with I during NCQ, "
1251 "this message won't be printed again\n");
1252 pp
->ncq_saw_d2h
= 1;
1256 if (status
& PORT_IRQ_DMAS_FIS
) {
1257 if (!pp
->ncq_saw_dmas
)
1258 ata_port_printk(ap
, KERN_INFO
,
1259 "DMAS FIS during NCQ, "
1260 "this message won't be printed again\n");
1261 pp
->ncq_saw_dmas
= 1;
1265 if (status
& PORT_IRQ_SDB_FIS
) {
1266 const __le32
*f
= pp
->rx_fis
+ RX_FIS_SDB
;
1268 if (le32_to_cpu(f
[1])) {
1269 /* SDB FIS containing spurious completions
1270 * might be dangerous, whine and fail commands
1271 * with HSM violation. EH will turn off NCQ
1272 * after several such failures.
1274 ata_ehi_push_desc(ehi
,
1275 "spurious completions during NCQ "
1276 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1277 readl(port_mmio
+ PORT_CMD_ISSUE
),
1278 readl(port_mmio
+ PORT_SCR_ACT
),
1279 le32_to_cpu(f
[0]), le32_to_cpu(f
[1]));
1280 ehi
->err_mask
|= AC_ERR_HSM
;
1281 ehi
->action
|= ATA_EH_SOFTRESET
;
1282 ata_port_freeze(ap
);
1284 if (!pp
->ncq_saw_sdb
)
1285 ata_port_printk(ap
, KERN_INFO
,
1286 "spurious SDB FIS %08x:%08x during NCQ, "
1287 "this message won't be printed again\n",
1288 le32_to_cpu(f
[0]), le32_to_cpu(f
[1]));
1289 pp
->ncq_saw_sdb
= 1;
1295 ata_port_printk(ap
, KERN_INFO
, "spurious interrupt "
1296 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1297 status
, ap
->active_tag
, ap
->sactive
);
1300 static void ahci_irq_clear(struct ata_port
*ap
)
1305 static irqreturn_t
ahci_interrupt(int irq
, void *dev_instance
)
1307 struct ata_host
*host
= dev_instance
;
1308 struct ahci_host_priv
*hpriv
;
1309 unsigned int i
, handled
= 0;
1311 u32 irq_stat
, irq_ack
= 0;
1315 hpriv
= host
->private_data
;
1316 mmio
= host
->iomap
[AHCI_PCI_BAR
];
1318 /* sigh. 0xffffffff is a valid return from h/w */
1319 irq_stat
= readl(mmio
+ HOST_IRQ_STAT
);
1320 irq_stat
&= hpriv
->port_map
;
1324 spin_lock(&host
->lock
);
1326 for (i
= 0; i
< host
->n_ports
; i
++) {
1327 struct ata_port
*ap
;
1329 if (!(irq_stat
& (1 << i
)))
1332 ap
= host
->ports
[i
];
1335 VPRINTK("port %u\n", i
);
1337 VPRINTK("port %u (no irq)\n", i
);
1338 if (ata_ratelimit())
1339 dev_printk(KERN_WARNING
, host
->dev
,
1340 "interrupt on disabled port %u\n", i
);
1343 irq_ack
|= (1 << i
);
1347 writel(irq_ack
, mmio
+ HOST_IRQ_STAT
);
1351 spin_unlock(&host
->lock
);
1355 return IRQ_RETVAL(handled
);
1358 static unsigned int ahci_qc_issue(struct ata_queued_cmd
*qc
)
1360 struct ata_port
*ap
= qc
->ap
;
1361 void __iomem
*port_mmio
= ap
->ioaddr
.cmd_addr
;
1363 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
1364 writel(1 << qc
->tag
, port_mmio
+ PORT_SCR_ACT
);
1365 writel(1 << qc
->tag
, port_mmio
+ PORT_CMD_ISSUE
);
1366 readl(port_mmio
+ PORT_CMD_ISSUE
); /* flush */
1371 static void ahci_freeze(struct ata_port
*ap
)
1373 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1374 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1377 writel(0, port_mmio
+ PORT_IRQ_MASK
);
1380 static void ahci_thaw(struct ata_port
*ap
)
1382 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1383 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1387 tmp
= readl(port_mmio
+ PORT_IRQ_STAT
);
1388 writel(tmp
, port_mmio
+ PORT_IRQ_STAT
);
1389 writel(1 << ap
->port_no
, mmio
+ HOST_IRQ_STAT
);
1391 /* turn IRQ back on */
1392 writel(DEF_PORT_IRQ
, port_mmio
+ PORT_IRQ_MASK
);
1395 static void ahci_error_handler(struct ata_port
*ap
)
1397 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1398 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1400 if (!(ap
->pflags
& ATA_PFLAG_FROZEN
)) {
1401 /* restart engine */
1402 ahci_stop_engine(port_mmio
);
1403 ahci_start_engine(port_mmio
);
1406 /* perform recovery */
1407 ata_do_eh(ap
, ata_std_prereset
, ahci_softreset
, ahci_hardreset
,
1411 static void ahci_vt8251_error_handler(struct ata_port
*ap
)
1413 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1414 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1416 if (!(ap
->pflags
& ATA_PFLAG_FROZEN
)) {
1417 /* restart engine */
1418 ahci_stop_engine(port_mmio
);
1419 ahci_start_engine(port_mmio
);
1422 /* perform recovery */
1423 ata_do_eh(ap
, ata_std_prereset
, ahci_softreset
, ahci_vt8251_hardreset
,
1427 static void ahci_post_internal_cmd(struct ata_queued_cmd
*qc
)
1429 struct ata_port
*ap
= qc
->ap
;
1430 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1431 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1433 if (qc
->flags
& ATA_QCFLAG_FAILED
) {
1434 /* make DMA engine forget about the failed command */
1435 ahci_stop_engine(port_mmio
);
1436 ahci_start_engine(port_mmio
);
1441 static int ahci_port_suspend(struct ata_port
*ap
, pm_message_t mesg
)
1443 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
1444 struct ahci_port_priv
*pp
= ap
->private_data
;
1445 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1446 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1447 const char *emsg
= NULL
;
1450 rc
= ahci_deinit_port(port_mmio
, hpriv
->cap
, &emsg
);
1452 ahci_power_down(port_mmio
, hpriv
->cap
);
1454 ata_port_printk(ap
, KERN_ERR
, "%s (%d)\n", emsg
, rc
);
1455 ahci_init_port(port_mmio
, hpriv
->cap
,
1456 pp
->cmd_slot_dma
, pp
->rx_fis_dma
);
1462 static int ahci_port_resume(struct ata_port
*ap
)
1464 struct ahci_port_priv
*pp
= ap
->private_data
;
1465 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
1466 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1467 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1469 ahci_power_up(port_mmio
, hpriv
->cap
);
1470 ahci_init_port(port_mmio
, hpriv
->cap
, pp
->cmd_slot_dma
, pp
->rx_fis_dma
);
1475 static int ahci_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
1477 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
1478 void __iomem
*mmio
= host
->iomap
[AHCI_PCI_BAR
];
1481 if (mesg
.event
== PM_EVENT_SUSPEND
) {
1482 /* AHCI spec rev1.1 section 8.3.3:
1483 * Software must disable interrupts prior to requesting a
1484 * transition of the HBA to D3 state.
1486 ctl
= readl(mmio
+ HOST_CTL
);
1487 ctl
&= ~HOST_IRQ_EN
;
1488 writel(ctl
, mmio
+ HOST_CTL
);
1489 readl(mmio
+ HOST_CTL
); /* flush */
1492 return ata_pci_device_suspend(pdev
, mesg
);
1495 static int ahci_pci_device_resume(struct pci_dev
*pdev
)
1497 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
1498 struct ahci_host_priv
*hpriv
= host
->private_data
;
1499 void __iomem
*mmio
= host
->iomap
[AHCI_PCI_BAR
];
1502 rc
= ata_pci_device_do_resume(pdev
);
1506 if (pdev
->dev
.power
.power_state
.event
== PM_EVENT_SUSPEND
) {
1507 rc
= ahci_reset_controller(mmio
, pdev
, hpriv
);
1511 ahci_init_controller(mmio
, pdev
, host
->n_ports
,
1512 host
->ports
[0]->flags
, hpriv
);
1515 ata_host_resume(host
);
1521 static int ahci_port_start(struct ata_port
*ap
)
1523 struct device
*dev
= ap
->host
->dev
;
1524 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
1525 struct ahci_port_priv
*pp
;
1526 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1527 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1532 pp
= devm_kzalloc(dev
, sizeof(*pp
), GFP_KERNEL
);
1536 rc
= ata_pad_alloc(ap
, dev
);
1540 mem
= dmam_alloc_coherent(dev
, AHCI_PORT_PRIV_DMA_SZ
, &mem_dma
,
1544 memset(mem
, 0, AHCI_PORT_PRIV_DMA_SZ
);
1547 * First item in chunk of DMA memory: 32-slot command table,
1548 * 32 bytes each in size
1551 pp
->cmd_slot_dma
= mem_dma
;
1553 mem
+= AHCI_CMD_SLOT_SZ
;
1554 mem_dma
+= AHCI_CMD_SLOT_SZ
;
1557 * Second item: Received-FIS area
1560 pp
->rx_fis_dma
= mem_dma
;
1562 mem
+= AHCI_RX_FIS_SZ
;
1563 mem_dma
+= AHCI_RX_FIS_SZ
;
1566 * Third item: data area for storing a single command
1567 * and its scatter-gather table
1570 pp
->cmd_tbl_dma
= mem_dma
;
1572 ap
->private_data
= pp
;
1575 ahci_power_up(port_mmio
, hpriv
->cap
);
1577 /* initialize port */
1578 ahci_init_port(port_mmio
, hpriv
->cap
, pp
->cmd_slot_dma
, pp
->rx_fis_dma
);
1583 static void ahci_port_stop(struct ata_port
*ap
)
1585 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
1586 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1587 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1588 const char *emsg
= NULL
;
1591 /* de-initialize port */
1592 rc
= ahci_deinit_port(port_mmio
, hpriv
->cap
, &emsg
);
1594 ata_port_printk(ap
, KERN_WARNING
, "%s (%d)\n", emsg
, rc
);
1597 static void ahci_setup_port(struct ata_ioports
*port
, void __iomem
*base
,
1598 unsigned int port_idx
)
1600 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base
, port_idx
);
1601 base
= ahci_port_base(base
, port_idx
);
1602 VPRINTK("base now==0x%lx\n", base
);
1604 port
->cmd_addr
= base
;
1605 port
->scr_addr
= base
+ PORT_SCR
;
1610 static int ahci_host_init(struct ata_probe_ent
*probe_ent
)
1612 struct ahci_host_priv
*hpriv
= probe_ent
->private_data
;
1613 struct pci_dev
*pdev
= to_pci_dev(probe_ent
->dev
);
1614 void __iomem
*mmio
= probe_ent
->iomap
[AHCI_PCI_BAR
];
1615 unsigned int i
, using_dac
;
1618 rc
= ahci_reset_controller(mmio
, pdev
, hpriv
);
1622 probe_ent
->n_ports
= fls(hpriv
->port_map
);
1623 probe_ent
->dummy_port_mask
= ~hpriv
->port_map
;
1625 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1626 hpriv
->cap
, hpriv
->port_map
, probe_ent
->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
);