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/sched.h>
43 #include <linux/dma-mapping.h>
44 #include <linux/device.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_cmnd.h>
47 #include <linux/libata.h>
49 #define DRV_NAME "ahci"
50 #define DRV_VERSION "2.0"
56 AHCI_MAX_SG
= 168, /* hardware max is 64K */
57 AHCI_DMA_BOUNDARY
= 0xffffffff,
58 AHCI_USE_CLUSTERING
= 0,
61 AHCI_CMD_SLOT_SZ
= AHCI_MAX_CMDS
* AHCI_CMD_SZ
,
63 AHCI_CMD_TBL_CDB
= 0x40,
64 AHCI_CMD_TBL_HDR_SZ
= 0x80,
65 AHCI_CMD_TBL_SZ
= AHCI_CMD_TBL_HDR_SZ
+ (AHCI_MAX_SG
* 16),
66 AHCI_CMD_TBL_AR_SZ
= AHCI_CMD_TBL_SZ
* AHCI_MAX_CMDS
,
67 AHCI_PORT_PRIV_DMA_SZ
= AHCI_CMD_SLOT_SZ
+ AHCI_CMD_TBL_AR_SZ
+
69 AHCI_IRQ_ON_SG
= (1 << 31),
70 AHCI_CMD_ATAPI
= (1 << 5),
71 AHCI_CMD_WRITE
= (1 << 6),
72 AHCI_CMD_PREFETCH
= (1 << 7),
73 AHCI_CMD_RESET
= (1 << 8),
74 AHCI_CMD_CLR_BUSY
= (1 << 10),
76 RX_FIS_D2H_REG
= 0x40, /* offset of D2H Register FIS data */
77 RX_FIS_SDB
= 0x58, /* offset of SDB FIS data */
78 RX_FIS_UNK
= 0x60, /* offset of Unknown FIS data */
82 board_ahci_vt8251
= 2,
83 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 */
174 struct ahci_cmd_hdr
{
189 struct ahci_host_priv
{
190 u32 cap
; /* cache of HOST_CAP register */
191 u32 port_map
; /* cache of HOST_PORTS_IMPL reg */
194 struct ahci_port_priv
{
195 struct ahci_cmd_hdr
*cmd_slot
;
196 dma_addr_t cmd_slot_dma
;
198 dma_addr_t cmd_tbl_dma
;
200 dma_addr_t rx_fis_dma
;
201 /* for NCQ spurious interrupt analysis */
202 int ncq_saw_spurious_sdb_cnt
;
203 unsigned int ncq_saw_d2h
:1;
204 unsigned int ncq_saw_dmas
:1;
207 static u32
ahci_scr_read (struct ata_port
*ap
, unsigned int sc_reg
);
208 static void ahci_scr_write (struct ata_port
*ap
, unsigned int sc_reg
, u32 val
);
209 static int ahci_init_one (struct pci_dev
*pdev
, const struct pci_device_id
*ent
);
210 static unsigned int ahci_qc_issue(struct ata_queued_cmd
*qc
);
211 static irqreturn_t
ahci_interrupt (int irq
, void *dev_instance
);
212 static void ahci_irq_clear(struct ata_port
*ap
);
213 static int ahci_port_start(struct ata_port
*ap
);
214 static void ahci_port_stop(struct ata_port
*ap
);
215 static void ahci_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
);
216 static void ahci_qc_prep(struct ata_queued_cmd
*qc
);
217 static u8
ahci_check_status(struct ata_port
*ap
);
218 static void ahci_freeze(struct ata_port
*ap
);
219 static void ahci_thaw(struct ata_port
*ap
);
220 static void ahci_error_handler(struct ata_port
*ap
);
221 static void ahci_vt8251_error_handler(struct ata_port
*ap
);
222 static void ahci_post_internal_cmd(struct ata_queued_cmd
*qc
);
223 static int ahci_port_suspend(struct ata_port
*ap
, pm_message_t mesg
);
224 static int ahci_port_resume(struct ata_port
*ap
);
225 static int ahci_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
);
226 static int ahci_pci_device_resume(struct pci_dev
*pdev
);
228 static struct scsi_host_template ahci_sht
= {
229 .module
= THIS_MODULE
,
231 .ioctl
= ata_scsi_ioctl
,
232 .queuecommand
= ata_scsi_queuecmd
,
233 .change_queue_depth
= ata_scsi_change_queue_depth
,
234 .can_queue
= AHCI_MAX_CMDS
- 1,
235 .this_id
= ATA_SHT_THIS_ID
,
236 .sg_tablesize
= AHCI_MAX_SG
,
237 .cmd_per_lun
= ATA_SHT_CMD_PER_LUN
,
238 .emulated
= ATA_SHT_EMULATED
,
239 .use_clustering
= AHCI_USE_CLUSTERING
,
240 .proc_name
= DRV_NAME
,
241 .dma_boundary
= AHCI_DMA_BOUNDARY
,
242 .slave_configure
= ata_scsi_slave_config
,
243 .slave_destroy
= ata_scsi_slave_destroy
,
244 .bios_param
= ata_std_bios_param
,
245 .suspend
= ata_scsi_device_suspend
,
246 .resume
= ata_scsi_device_resume
,
249 static const struct ata_port_operations ahci_ops
= {
250 .port_disable
= ata_port_disable
,
252 .check_status
= ahci_check_status
,
253 .check_altstatus
= ahci_check_status
,
254 .dev_select
= ata_noop_dev_select
,
256 .tf_read
= ahci_tf_read
,
258 .qc_prep
= ahci_qc_prep
,
259 .qc_issue
= ahci_qc_issue
,
261 .irq_handler
= ahci_interrupt
,
262 .irq_clear
= ahci_irq_clear
,
264 .scr_read
= ahci_scr_read
,
265 .scr_write
= ahci_scr_write
,
267 .freeze
= ahci_freeze
,
270 .error_handler
= ahci_error_handler
,
271 .post_internal_cmd
= ahci_post_internal_cmd
,
273 .port_suspend
= ahci_port_suspend
,
274 .port_resume
= ahci_port_resume
,
276 .port_start
= ahci_port_start
,
277 .port_stop
= ahci_port_stop
,
280 static const struct ata_port_operations ahci_vt8251_ops
= {
281 .port_disable
= ata_port_disable
,
283 .check_status
= ahci_check_status
,
284 .check_altstatus
= ahci_check_status
,
285 .dev_select
= ata_noop_dev_select
,
287 .tf_read
= ahci_tf_read
,
289 .qc_prep
= ahci_qc_prep
,
290 .qc_issue
= ahci_qc_issue
,
292 .irq_handler
= ahci_interrupt
,
293 .irq_clear
= ahci_irq_clear
,
295 .scr_read
= ahci_scr_read
,
296 .scr_write
= ahci_scr_write
,
298 .freeze
= ahci_freeze
,
301 .error_handler
= ahci_vt8251_error_handler
,
302 .post_internal_cmd
= ahci_post_internal_cmd
,
304 .port_suspend
= ahci_port_suspend
,
305 .port_resume
= ahci_port_resume
,
307 .port_start
= ahci_port_start
,
308 .port_stop
= ahci_port_stop
,
311 static const struct ata_port_info ahci_port_info
[] = {
315 .flags
= ATA_FLAG_SATA
| ATA_FLAG_NO_LEGACY
|
316 ATA_FLAG_MMIO
| ATA_FLAG_PIO_DMA
|
317 ATA_FLAG_SKIP_D2H_BSY
,
318 .pio_mask
= 0x1f, /* pio0-4 */
319 .udma_mask
= 0x7f, /* udma0-6 ; FIXME */
320 .port_ops
= &ahci_ops
,
325 .flags
= ATA_FLAG_SATA
| ATA_FLAG_NO_LEGACY
|
326 ATA_FLAG_MMIO
| ATA_FLAG_PIO_DMA
|
327 ATA_FLAG_SKIP_D2H_BSY
| AHCI_FLAG_HONOR_PI
,
328 .pio_mask
= 0x1f, /* pio0-4 */
329 .udma_mask
= 0x7f, /* udma0-6 ; FIXME */
330 .port_ops
= &ahci_ops
,
332 /* board_ahci_vt8251 */
335 .flags
= ATA_FLAG_SATA
| ATA_FLAG_NO_LEGACY
|
336 ATA_FLAG_MMIO
| ATA_FLAG_PIO_DMA
|
337 ATA_FLAG_SKIP_D2H_BSY
|
338 ATA_FLAG_HRST_TO_RESUME
| AHCI_FLAG_NO_NCQ
,
339 .pio_mask
= 0x1f, /* pio0-4 */
340 .udma_mask
= 0x7f, /* udma0-6 ; FIXME */
341 .port_ops
= &ahci_vt8251_ops
,
343 /* board_ahci_ign_iferr */
346 .flags
= ATA_FLAG_SATA
| ATA_FLAG_NO_LEGACY
|
347 ATA_FLAG_MMIO
| ATA_FLAG_PIO_DMA
|
348 ATA_FLAG_SKIP_D2H_BSY
|
349 AHCI_FLAG_IGN_IRQ_IF_ERR
,
350 .pio_mask
= 0x1f, /* pio0-4 */
351 .udma_mask
= 0x7f, /* udma0-6 ; FIXME */
352 .port_ops
= &ahci_ops
,
356 static const struct pci_device_id ahci_pci_tbl
[] = {
358 { PCI_VDEVICE(INTEL
, 0x2652), board_ahci
}, /* ICH6 */
359 { PCI_VDEVICE(INTEL
, 0x2653), board_ahci
}, /* ICH6M */
360 { PCI_VDEVICE(INTEL
, 0x27c1), board_ahci
}, /* ICH7 */
361 { PCI_VDEVICE(INTEL
, 0x27c5), board_ahci
}, /* ICH7M */
362 { PCI_VDEVICE(INTEL
, 0x27c3), board_ahci
}, /* ICH7R */
363 { PCI_VDEVICE(AL
, 0x5288), board_ahci_ign_iferr
}, /* ULi M5288 */
364 { PCI_VDEVICE(INTEL
, 0x2681), board_ahci
}, /* ESB2 */
365 { PCI_VDEVICE(INTEL
, 0x2682), board_ahci
}, /* ESB2 */
366 { PCI_VDEVICE(INTEL
, 0x2683), board_ahci
}, /* ESB2 */
367 { PCI_VDEVICE(INTEL
, 0x27c6), board_ahci
}, /* ICH7-M DH */
368 { PCI_VDEVICE(INTEL
, 0x2821), board_ahci_pi
}, /* ICH8 */
369 { PCI_VDEVICE(INTEL
, 0x2822), board_ahci_pi
}, /* ICH8 */
370 { PCI_VDEVICE(INTEL
, 0x2824), board_ahci_pi
}, /* ICH8 */
371 { PCI_VDEVICE(INTEL
, 0x2829), board_ahci_pi
}, /* ICH8M */
372 { PCI_VDEVICE(INTEL
, 0x282a), board_ahci_pi
}, /* ICH8M */
373 { PCI_VDEVICE(INTEL
, 0x2922), board_ahci_pi
}, /* ICH9 */
374 { PCI_VDEVICE(INTEL
, 0x2923), board_ahci_pi
}, /* ICH9 */
375 { PCI_VDEVICE(INTEL
, 0x2924), board_ahci_pi
}, /* ICH9 */
376 { PCI_VDEVICE(INTEL
, 0x2925), board_ahci_pi
}, /* ICH9 */
377 { PCI_VDEVICE(INTEL
, 0x2927), board_ahci_pi
}, /* ICH9 */
378 { PCI_VDEVICE(INTEL
, 0x2929), board_ahci_pi
}, /* ICH9M */
379 { PCI_VDEVICE(INTEL
, 0x292a), board_ahci_pi
}, /* ICH9M */
380 { PCI_VDEVICE(INTEL
, 0x292b), board_ahci_pi
}, /* ICH9M */
381 { PCI_VDEVICE(INTEL
, 0x292f), board_ahci_pi
}, /* ICH9M */
382 { PCI_VDEVICE(INTEL
, 0x294d), board_ahci_pi
}, /* ICH9 */
383 { PCI_VDEVICE(INTEL
, 0x294e), board_ahci_pi
}, /* ICH9M */
386 { PCI_VDEVICE(JMICRON
, 0x2360), board_ahci_ign_iferr
}, /* JMB360 */
387 { PCI_VDEVICE(JMICRON
, 0x2361), board_ahci_ign_iferr
}, /* JMB361 */
388 { PCI_VDEVICE(JMICRON
, 0x2363), board_ahci_ign_iferr
}, /* JMB363 */
389 { PCI_VDEVICE(JMICRON
, 0x2365), board_ahci_ign_iferr
}, /* JMB365 */
390 { PCI_VDEVICE(JMICRON
, 0x2366), board_ahci_ign_iferr
}, /* JMB366 */
393 { PCI_VDEVICE(ATI
, 0x4380), board_ahci
}, /* ATI SB600 non-raid */
394 { PCI_VDEVICE(ATI
, 0x4381), board_ahci
}, /* ATI SB600 raid */
397 { PCI_VDEVICE(VIA
, 0x3349), board_ahci_vt8251
}, /* VIA VT8251 */
400 { PCI_VDEVICE(NVIDIA
, 0x044c), board_ahci
}, /* MCP65 */
401 { PCI_VDEVICE(NVIDIA
, 0x044d), board_ahci
}, /* MCP65 */
402 { PCI_VDEVICE(NVIDIA
, 0x044e), board_ahci
}, /* MCP65 */
403 { PCI_VDEVICE(NVIDIA
, 0x044f), board_ahci
}, /* MCP65 */
404 { PCI_VDEVICE(NVIDIA
, 0x045c), board_ahci
}, /* MCP65 */
405 { PCI_VDEVICE(NVIDIA
, 0x045d), board_ahci
}, /* MCP65 */
406 { PCI_VDEVICE(NVIDIA
, 0x045e), board_ahci
}, /* MCP65 */
407 { PCI_VDEVICE(NVIDIA
, 0x045f), board_ahci
}, /* MCP65 */
408 { PCI_VDEVICE(NVIDIA
, 0x0550), board_ahci
}, /* MCP67 */
409 { PCI_VDEVICE(NVIDIA
, 0x0551), board_ahci
}, /* MCP67 */
410 { PCI_VDEVICE(NVIDIA
, 0x0552), board_ahci
}, /* MCP67 */
411 { PCI_VDEVICE(NVIDIA
, 0x0553), board_ahci
}, /* MCP67 */
412 { PCI_VDEVICE(NVIDIA
, 0x0554), board_ahci
}, /* MCP67 */
413 { PCI_VDEVICE(NVIDIA
, 0x0555), board_ahci
}, /* MCP67 */
414 { PCI_VDEVICE(NVIDIA
, 0x0556), board_ahci
}, /* MCP67 */
415 { PCI_VDEVICE(NVIDIA
, 0x0557), board_ahci
}, /* MCP67 */
416 { PCI_VDEVICE(NVIDIA
, 0x0558), board_ahci
}, /* MCP67 */
417 { PCI_VDEVICE(NVIDIA
, 0x0559), board_ahci
}, /* MCP67 */
418 { PCI_VDEVICE(NVIDIA
, 0x055a), board_ahci
}, /* MCP67 */
419 { PCI_VDEVICE(NVIDIA
, 0x055b), board_ahci
}, /* MCP67 */
422 { PCI_VDEVICE(SI
, 0x1184), board_ahci
}, /* SiS 966 */
423 { PCI_VDEVICE(SI
, 0x1185), board_ahci
}, /* SiS 966 */
424 { PCI_VDEVICE(SI
, 0x0186), board_ahci
}, /* SiS 968 */
426 /* Generic, PCI class code for AHCI */
427 { PCI_ANY_ID
, PCI_ANY_ID
, PCI_ANY_ID
, PCI_ANY_ID
,
428 PCI_CLASS_STORAGE_SATA_AHCI
, 0xffffff, board_ahci
},
430 { } /* terminate list */
434 static struct pci_driver ahci_pci_driver
= {
436 .id_table
= ahci_pci_tbl
,
437 .probe
= ahci_init_one
,
438 .remove
= ata_pci_remove_one
,
439 .suspend
= ahci_pci_device_suspend
,
440 .resume
= ahci_pci_device_resume
,
444 static inline int ahci_nr_ports(u32 cap
)
446 return (cap
& 0x1f) + 1;
449 static inline void __iomem
*ahci_port_base(void __iomem
*base
,
452 return base
+ 0x100 + (port
* 0x80);
455 static u32
ahci_scr_read (struct ata_port
*ap
, unsigned int sc_reg_in
)
460 case SCR_STATUS
: sc_reg
= 0; break;
461 case SCR_CONTROL
: sc_reg
= 1; break;
462 case SCR_ERROR
: sc_reg
= 2; break;
463 case SCR_ACTIVE
: sc_reg
= 3; break;
468 return readl(ap
->ioaddr
.scr_addr
+ (sc_reg
* 4));
472 static void ahci_scr_write (struct ata_port
*ap
, unsigned int sc_reg_in
,
478 case SCR_STATUS
: sc_reg
= 0; break;
479 case SCR_CONTROL
: sc_reg
= 1; break;
480 case SCR_ERROR
: sc_reg
= 2; break;
481 case SCR_ACTIVE
: sc_reg
= 3; break;
486 writel(val
, ap
->ioaddr
.scr_addr
+ (sc_reg
* 4));
489 static void ahci_start_engine(void __iomem
*port_mmio
)
494 tmp
= readl(port_mmio
+ PORT_CMD
);
495 tmp
|= PORT_CMD_START
;
496 writel(tmp
, port_mmio
+ PORT_CMD
);
497 readl(port_mmio
+ PORT_CMD
); /* flush */
500 static int ahci_stop_engine(void __iomem
*port_mmio
)
504 tmp
= readl(port_mmio
+ PORT_CMD
);
506 /* check if the HBA is idle */
507 if ((tmp
& (PORT_CMD_START
| PORT_CMD_LIST_ON
)) == 0)
510 /* setting HBA to idle */
511 tmp
&= ~PORT_CMD_START
;
512 writel(tmp
, port_mmio
+ PORT_CMD
);
514 /* wait for engine to stop. This could be as long as 500 msec */
515 tmp
= ata_wait_register(port_mmio
+ PORT_CMD
,
516 PORT_CMD_LIST_ON
, PORT_CMD_LIST_ON
, 1, 500);
517 if (tmp
& PORT_CMD_LIST_ON
)
523 static void ahci_start_fis_rx(void __iomem
*port_mmio
, u32 cap
,
524 dma_addr_t cmd_slot_dma
, dma_addr_t rx_fis_dma
)
528 /* set FIS registers */
529 if (cap
& HOST_CAP_64
)
530 writel((cmd_slot_dma
>> 16) >> 16, port_mmio
+ PORT_LST_ADDR_HI
);
531 writel(cmd_slot_dma
& 0xffffffff, port_mmio
+ PORT_LST_ADDR
);
533 if (cap
& HOST_CAP_64
)
534 writel((rx_fis_dma
>> 16) >> 16, port_mmio
+ PORT_FIS_ADDR_HI
);
535 writel(rx_fis_dma
& 0xffffffff, port_mmio
+ PORT_FIS_ADDR
);
537 /* enable FIS reception */
538 tmp
= readl(port_mmio
+ PORT_CMD
);
539 tmp
|= PORT_CMD_FIS_RX
;
540 writel(tmp
, port_mmio
+ PORT_CMD
);
543 readl(port_mmio
+ PORT_CMD
);
546 static int ahci_stop_fis_rx(void __iomem
*port_mmio
)
550 /* disable FIS reception */
551 tmp
= readl(port_mmio
+ PORT_CMD
);
552 tmp
&= ~PORT_CMD_FIS_RX
;
553 writel(tmp
, port_mmio
+ PORT_CMD
);
555 /* wait for completion, spec says 500ms, give it 1000 */
556 tmp
= ata_wait_register(port_mmio
+ PORT_CMD
, PORT_CMD_FIS_ON
,
557 PORT_CMD_FIS_ON
, 10, 1000);
558 if (tmp
& PORT_CMD_FIS_ON
)
564 static void ahci_power_up(void __iomem
*port_mmio
, u32 cap
)
568 cmd
= readl(port_mmio
+ PORT_CMD
) & ~PORT_CMD_ICC_MASK
;
571 if (cap
& HOST_CAP_SSS
) {
572 cmd
|= PORT_CMD_SPIN_UP
;
573 writel(cmd
, port_mmio
+ PORT_CMD
);
577 writel(cmd
| PORT_CMD_ICC_ACTIVE
, port_mmio
+ PORT_CMD
);
580 static void ahci_power_down(void __iomem
*port_mmio
, u32 cap
)
584 if (!(cap
& HOST_CAP_SSS
))
587 /* put device into listen mode, first set PxSCTL.DET to 0 */
588 scontrol
= readl(port_mmio
+ PORT_SCR_CTL
);
590 writel(scontrol
, port_mmio
+ PORT_SCR_CTL
);
592 /* then set PxCMD.SUD to 0 */
593 cmd
= readl(port_mmio
+ PORT_CMD
) & ~PORT_CMD_ICC_MASK
;
594 cmd
&= ~PORT_CMD_SPIN_UP
;
595 writel(cmd
, port_mmio
+ PORT_CMD
);
598 static void ahci_init_port(void __iomem
*port_mmio
, u32 cap
,
599 dma_addr_t cmd_slot_dma
, dma_addr_t rx_fis_dma
)
601 /* enable FIS reception */
602 ahci_start_fis_rx(port_mmio
, cap
, cmd_slot_dma
, rx_fis_dma
);
605 ahci_start_engine(port_mmio
);
608 static int ahci_deinit_port(void __iomem
*port_mmio
, u32 cap
, const char **emsg
)
613 rc
= ahci_stop_engine(port_mmio
);
615 *emsg
= "failed to stop engine";
619 /* disable FIS reception */
620 rc
= ahci_stop_fis_rx(port_mmio
);
622 *emsg
= "failed stop FIS RX";
629 static int ahci_reset_controller(void __iomem
*mmio
, struct pci_dev
*pdev
)
631 u32 cap_save
, impl_save
, tmp
;
633 cap_save
= readl(mmio
+ HOST_CAP
);
634 impl_save
= readl(mmio
+ HOST_PORTS_IMPL
);
636 /* global controller reset */
637 tmp
= readl(mmio
+ HOST_CTL
);
638 if ((tmp
& HOST_RESET
) == 0) {
639 writel(tmp
| HOST_RESET
, mmio
+ HOST_CTL
);
640 readl(mmio
+ HOST_CTL
); /* flush */
643 /* reset must complete within 1 second, or
644 * the hardware should be considered fried.
648 tmp
= readl(mmio
+ HOST_CTL
);
649 if (tmp
& HOST_RESET
) {
650 dev_printk(KERN_ERR
, &pdev
->dev
,
651 "controller reset failed (0x%x)\n", tmp
);
655 /* turn on AHCI mode */
656 writel(HOST_AHCI_EN
, mmio
+ HOST_CTL
);
657 (void) readl(mmio
+ HOST_CTL
); /* flush */
659 /* These write-once registers are normally cleared on reset.
660 * Restore BIOS values... which we HOPE were present before
664 impl_save
= (1 << ahci_nr_ports(cap_save
)) - 1;
665 dev_printk(KERN_WARNING
, &pdev
->dev
,
666 "PORTS_IMPL is zero, forcing 0x%x\n", impl_save
);
668 writel(cap_save
, mmio
+ HOST_CAP
);
669 writel(impl_save
, mmio
+ HOST_PORTS_IMPL
);
670 (void) readl(mmio
+ HOST_PORTS_IMPL
); /* flush */
672 if (pdev
->vendor
== PCI_VENDOR_ID_INTEL
) {
676 pci_read_config_word(pdev
, 0x92, &tmp16
);
678 pci_write_config_word(pdev
, 0x92, tmp16
);
684 static void ahci_init_controller(void __iomem
*mmio
, struct pci_dev
*pdev
,
685 int n_ports
, unsigned int port_flags
,
686 struct ahci_host_priv
*hpriv
)
691 for (i
= 0; i
< n_ports
; i
++) {
692 void __iomem
*port_mmio
= ahci_port_base(mmio
, i
);
693 const char *emsg
= NULL
;
695 if ((port_flags
& AHCI_FLAG_HONOR_PI
) &&
696 !(hpriv
->port_map
& (1 << i
)))
699 /* make sure port is not active */
700 rc
= ahci_deinit_port(port_mmio
, hpriv
->cap
, &emsg
);
702 dev_printk(KERN_WARNING
, &pdev
->dev
,
703 "%s (%d)\n", emsg
, rc
);
706 tmp
= readl(port_mmio
+ PORT_SCR_ERR
);
707 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp
);
708 writel(tmp
, port_mmio
+ PORT_SCR_ERR
);
711 tmp
= readl(port_mmio
+ PORT_IRQ_STAT
);
712 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp
);
714 writel(tmp
, port_mmio
+ PORT_IRQ_STAT
);
716 writel(1 << i
, mmio
+ HOST_IRQ_STAT
);
719 tmp
= readl(mmio
+ HOST_CTL
);
720 VPRINTK("HOST_CTL 0x%x\n", tmp
);
721 writel(tmp
| HOST_IRQ_EN
, mmio
+ HOST_CTL
);
722 tmp
= readl(mmio
+ HOST_CTL
);
723 VPRINTK("HOST_CTL 0x%x\n", tmp
);
726 static unsigned int ahci_dev_classify(struct ata_port
*ap
)
728 void __iomem
*port_mmio
= ap
->ioaddr
.cmd_addr
;
729 struct ata_taskfile tf
;
732 tmp
= readl(port_mmio
+ PORT_SIG
);
733 tf
.lbah
= (tmp
>> 24) & 0xff;
734 tf
.lbam
= (tmp
>> 16) & 0xff;
735 tf
.lbal
= (tmp
>> 8) & 0xff;
736 tf
.nsect
= (tmp
) & 0xff;
738 return ata_dev_classify(&tf
);
741 static void ahci_fill_cmd_slot(struct ahci_port_priv
*pp
, unsigned int tag
,
744 dma_addr_t cmd_tbl_dma
;
746 cmd_tbl_dma
= pp
->cmd_tbl_dma
+ tag
* AHCI_CMD_TBL_SZ
;
748 pp
->cmd_slot
[tag
].opts
= cpu_to_le32(opts
);
749 pp
->cmd_slot
[tag
].status
= 0;
750 pp
->cmd_slot
[tag
].tbl_addr
= cpu_to_le32(cmd_tbl_dma
& 0xffffffff);
751 pp
->cmd_slot
[tag
].tbl_addr_hi
= cpu_to_le32((cmd_tbl_dma
>> 16) >> 16);
754 static int ahci_clo(struct ata_port
*ap
)
756 void __iomem
*port_mmio
= ap
->ioaddr
.cmd_addr
;
757 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
760 if (!(hpriv
->cap
& HOST_CAP_CLO
))
763 tmp
= readl(port_mmio
+ PORT_CMD
);
765 writel(tmp
, port_mmio
+ PORT_CMD
);
767 tmp
= ata_wait_register(port_mmio
+ PORT_CMD
,
768 PORT_CMD_CLO
, PORT_CMD_CLO
, 1, 500);
769 if (tmp
& PORT_CMD_CLO
)
775 static int ahci_softreset(struct ata_port
*ap
, unsigned int *class)
777 struct ahci_port_priv
*pp
= ap
->private_data
;
778 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
779 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
780 const u32 cmd_fis_len
= 5; /* five dwords */
781 const char *reason
= NULL
;
782 struct ata_taskfile tf
;
789 if (ata_port_offline(ap
)) {
790 DPRINTK("PHY reports no device\n");
791 *class = ATA_DEV_NONE
;
795 /* prepare for SRST (AHCI-1.1 10.4.1) */
796 rc
= ahci_stop_engine(port_mmio
);
798 reason
= "failed to stop engine";
802 /* check BUSY/DRQ, perform Command List Override if necessary */
803 if (ahci_check_status(ap
) & (ATA_BUSY
| ATA_DRQ
)) {
806 if (rc
== -EOPNOTSUPP
) {
807 reason
= "port busy but CLO unavailable";
810 reason
= "port busy but CLO failed";
816 ahci_start_engine(port_mmio
);
818 ata_tf_init(ap
->device
, &tf
);
821 /* issue the first D2H Register FIS */
822 ahci_fill_cmd_slot(pp
, 0,
823 cmd_fis_len
| AHCI_CMD_RESET
| AHCI_CMD_CLR_BUSY
);
826 ata_tf_to_fis(&tf
, fis
, 0);
827 fis
[1] &= ~(1 << 7); /* turn off Command FIS bit */
829 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
831 tmp
= ata_wait_register(port_mmio
+ PORT_CMD_ISSUE
, 0x1, 0x1, 1, 500);
834 reason
= "1st FIS failed";
838 /* spec says at least 5us, but be generous and sleep for 1ms */
841 /* issue the second D2H Register FIS */
842 ahci_fill_cmd_slot(pp
, 0, cmd_fis_len
);
845 ata_tf_to_fis(&tf
, fis
, 0);
846 fis
[1] &= ~(1 << 7); /* turn off Command FIS bit */
848 writel(1, port_mmio
+ PORT_CMD_ISSUE
);
849 readl(port_mmio
+ PORT_CMD_ISSUE
); /* flush */
851 /* spec mandates ">= 2ms" before checking status.
852 * We wait 150ms, because that was the magic delay used for
853 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
854 * between when the ATA command register is written, and then
855 * status is checked. Because waiting for "a while" before
856 * checking status is fine, post SRST, we perform this magic
857 * delay here as well.
861 *class = ATA_DEV_NONE
;
862 if (ata_port_online(ap
)) {
863 if (ata_busy_sleep(ap
, ATA_TMOUT_BOOT_QUICK
, ATA_TMOUT_BOOT
)) {
865 reason
= "device not ready";
868 *class = ahci_dev_classify(ap
);
871 DPRINTK("EXIT, class=%u\n", *class);
875 ahci_start_engine(port_mmio
);
877 ata_port_printk(ap
, KERN_ERR
, "softreset failed (%s)\n", reason
);
881 static int ahci_hardreset(struct ata_port
*ap
, unsigned int *class)
883 struct ahci_port_priv
*pp
= ap
->private_data
;
884 u8
*d2h_fis
= pp
->rx_fis
+ RX_FIS_D2H_REG
;
885 struct ata_taskfile tf
;
886 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
887 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
892 ahci_stop_engine(port_mmio
);
894 /* clear D2H reception area to properly wait for D2H FIS */
895 ata_tf_init(ap
->device
, &tf
);
897 ata_tf_to_fis(&tf
, d2h_fis
, 0);
899 rc
= sata_std_hardreset(ap
, class);
901 ahci_start_engine(port_mmio
);
903 if (rc
== 0 && ata_port_online(ap
))
904 *class = ahci_dev_classify(ap
);
905 if (*class == ATA_DEV_UNKNOWN
)
906 *class = ATA_DEV_NONE
;
908 DPRINTK("EXIT, rc=%d, class=%u\n", rc
, *class);
912 static int ahci_vt8251_hardreset(struct ata_port
*ap
, unsigned int *class)
914 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
915 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
920 ahci_stop_engine(port_mmio
);
922 rc
= sata_port_hardreset(ap
, sata_ehc_deb_timing(&ap
->eh_context
));
924 /* vt8251 needs SError cleared for the port to operate */
925 ahci_scr_write(ap
, SCR_ERROR
, ahci_scr_read(ap
, SCR_ERROR
));
927 ahci_start_engine(port_mmio
);
929 DPRINTK("EXIT, rc=%d, class=%u\n", rc
, *class);
931 /* vt8251 doesn't clear BSY on signature FIS reception,
932 * request follow-up softreset.
934 return rc
?: -EAGAIN
;
937 static void ahci_postreset(struct ata_port
*ap
, unsigned int *class)
939 void __iomem
*port_mmio
= ap
->ioaddr
.cmd_addr
;
942 ata_std_postreset(ap
, class);
944 /* Make sure port's ATAPI bit is set appropriately */
945 new_tmp
= tmp
= readl(port_mmio
+ PORT_CMD
);
946 if (*class == ATA_DEV_ATAPI
)
947 new_tmp
|= PORT_CMD_ATAPI
;
949 new_tmp
&= ~PORT_CMD_ATAPI
;
950 if (new_tmp
!= tmp
) {
951 writel(new_tmp
, port_mmio
+ PORT_CMD
);
952 readl(port_mmio
+ PORT_CMD
); /* flush */
956 static u8
ahci_check_status(struct ata_port
*ap
)
958 void __iomem
*mmio
= ap
->ioaddr
.cmd_addr
;
960 return readl(mmio
+ PORT_TFDATA
) & 0xFF;
963 static void ahci_tf_read(struct ata_port
*ap
, struct ata_taskfile
*tf
)
965 struct ahci_port_priv
*pp
= ap
->private_data
;
966 u8
*d2h_fis
= pp
->rx_fis
+ RX_FIS_D2H_REG
;
968 ata_tf_from_fis(d2h_fis
, tf
);
971 static unsigned int ahci_fill_sg(struct ata_queued_cmd
*qc
, void *cmd_tbl
)
973 struct scatterlist
*sg
;
974 struct ahci_sg
*ahci_sg
;
975 unsigned int n_sg
= 0;
980 * Next, the S/G list.
982 ahci_sg
= cmd_tbl
+ AHCI_CMD_TBL_HDR_SZ
;
983 ata_for_each_sg(sg
, qc
) {
984 dma_addr_t addr
= sg_dma_address(sg
);
985 u32 sg_len
= sg_dma_len(sg
);
987 ahci_sg
->addr
= cpu_to_le32(addr
& 0xffffffff);
988 ahci_sg
->addr_hi
= cpu_to_le32((addr
>> 16) >> 16);
989 ahci_sg
->flags_size
= cpu_to_le32(sg_len
- 1);
998 static void ahci_qc_prep(struct ata_queued_cmd
*qc
)
1000 struct ata_port
*ap
= qc
->ap
;
1001 struct ahci_port_priv
*pp
= ap
->private_data
;
1002 int is_atapi
= is_atapi_taskfile(&qc
->tf
);
1005 const u32 cmd_fis_len
= 5; /* five dwords */
1006 unsigned int n_elem
;
1009 * Fill in command table information. First, the header,
1010 * a SATA Register - Host to Device command FIS.
1012 cmd_tbl
= pp
->cmd_tbl
+ qc
->tag
* AHCI_CMD_TBL_SZ
;
1014 ata_tf_to_fis(&qc
->tf
, cmd_tbl
, 0);
1016 memset(cmd_tbl
+ AHCI_CMD_TBL_CDB
, 0, 32);
1017 memcpy(cmd_tbl
+ AHCI_CMD_TBL_CDB
, qc
->cdb
, qc
->dev
->cdb_len
);
1021 if (qc
->flags
& ATA_QCFLAG_DMAMAP
)
1022 n_elem
= ahci_fill_sg(qc
, cmd_tbl
);
1025 * Fill in command slot information.
1027 opts
= cmd_fis_len
| n_elem
<< 16;
1028 if (qc
->tf
.flags
& ATA_TFLAG_WRITE
)
1029 opts
|= AHCI_CMD_WRITE
;
1031 opts
|= AHCI_CMD_ATAPI
| AHCI_CMD_PREFETCH
;
1033 ahci_fill_cmd_slot(pp
, qc
->tag
, opts
);
1036 static void ahci_error_intr(struct ata_port
*ap
, u32 irq_stat
)
1038 struct ahci_port_priv
*pp
= ap
->private_data
;
1039 struct ata_eh_info
*ehi
= &ap
->eh_info
;
1040 unsigned int err_mask
= 0, action
= 0;
1041 struct ata_queued_cmd
*qc
;
1044 ata_ehi_clear_desc(ehi
);
1046 /* AHCI needs SError cleared; otherwise, it might lock up */
1047 serror
= ahci_scr_read(ap
, SCR_ERROR
);
1048 ahci_scr_write(ap
, SCR_ERROR
, serror
);
1050 /* analyze @irq_stat */
1051 ata_ehi_push_desc(ehi
, "irq_stat 0x%08x", irq_stat
);
1053 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1054 if (ap
->flags
& AHCI_FLAG_IGN_IRQ_IF_ERR
)
1055 irq_stat
&= ~PORT_IRQ_IF_ERR
;
1057 if (irq_stat
& PORT_IRQ_TF_ERR
)
1058 err_mask
|= AC_ERR_DEV
;
1060 if (irq_stat
& (PORT_IRQ_HBUS_ERR
| PORT_IRQ_HBUS_DATA_ERR
)) {
1061 err_mask
|= AC_ERR_HOST_BUS
;
1062 action
|= ATA_EH_SOFTRESET
;
1065 if (irq_stat
& PORT_IRQ_IF_ERR
) {
1066 err_mask
|= AC_ERR_ATA_BUS
;
1067 action
|= ATA_EH_SOFTRESET
;
1068 ata_ehi_push_desc(ehi
, ", interface fatal error");
1071 if (irq_stat
& (PORT_IRQ_CONNECT
| PORT_IRQ_PHYRDY
)) {
1072 ata_ehi_hotplugged(ehi
);
1073 ata_ehi_push_desc(ehi
, ", %s", irq_stat
& PORT_IRQ_CONNECT
?
1074 "connection status changed" : "PHY RDY changed");
1077 if (irq_stat
& PORT_IRQ_UNK_FIS
) {
1078 u32
*unk
= (u32
*)(pp
->rx_fis
+ RX_FIS_UNK
);
1080 err_mask
|= AC_ERR_HSM
;
1081 action
|= ATA_EH_SOFTRESET
;
1082 ata_ehi_push_desc(ehi
, ", unknown FIS %08x %08x %08x %08x",
1083 unk
[0], unk
[1], unk
[2], unk
[3]);
1086 /* okay, let's hand over to EH */
1087 ehi
->serror
|= serror
;
1088 ehi
->action
|= action
;
1090 qc
= ata_qc_from_tag(ap
, ap
->active_tag
);
1092 qc
->err_mask
|= err_mask
;
1094 ehi
->err_mask
|= err_mask
;
1096 if (irq_stat
& PORT_IRQ_FREEZE
)
1097 ata_port_freeze(ap
);
1102 static void ahci_host_intr(struct ata_port
*ap
)
1104 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1105 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1106 struct ata_eh_info
*ehi
= &ap
->eh_info
;
1107 struct ahci_port_priv
*pp
= ap
->private_data
;
1108 u32 status
, qc_active
;
1109 int rc
, known_irq
= 0;
1111 status
= readl(port_mmio
+ PORT_IRQ_STAT
);
1112 writel(status
, port_mmio
+ PORT_IRQ_STAT
);
1114 if (unlikely(status
& PORT_IRQ_ERROR
)) {
1115 ahci_error_intr(ap
, status
);
1120 qc_active
= readl(port_mmio
+ PORT_SCR_ACT
);
1122 qc_active
= readl(port_mmio
+ PORT_CMD_ISSUE
);
1124 rc
= ata_qc_complete_multiple(ap
, qc_active
, NULL
);
1128 ehi
->err_mask
|= AC_ERR_HSM
;
1129 ehi
->action
|= ATA_EH_SOFTRESET
;
1130 ata_port_freeze(ap
);
1134 /* hmmm... a spurious interupt */
1136 /* if !NCQ, ignore. No modern ATA device has broken HSM
1137 * implementation for non-NCQ commands.
1142 if (status
& PORT_IRQ_D2H_REG_FIS
) {
1143 if (!pp
->ncq_saw_d2h
)
1144 ata_port_printk(ap
, KERN_INFO
,
1145 "D2H reg with I during NCQ, "
1146 "this message won't be printed again\n");
1147 pp
->ncq_saw_d2h
= 1;
1151 if (status
& PORT_IRQ_DMAS_FIS
) {
1152 if (!pp
->ncq_saw_dmas
)
1153 ata_port_printk(ap
, KERN_INFO
,
1154 "DMAS FIS during NCQ, "
1155 "this message won't be printed again\n");
1156 pp
->ncq_saw_dmas
= 1;
1160 if (status
& PORT_IRQ_SDB_FIS
&&
1161 pp
->ncq_saw_spurious_sdb_cnt
< 10) {
1162 /* SDB FIS containing spurious completions might be
1163 * dangerous, we need to know more about them. Print
1166 const __le32
*f
= pp
->rx_fis
+ RX_FIS_SDB
;
1168 ata_port_printk(ap
, KERN_INFO
, "Spurious SDB FIS during NCQ "
1169 "issue=0x%x SAct=0x%x FIS=%08x:%08x%s\n",
1170 readl(port_mmio
+ PORT_CMD_ISSUE
),
1171 readl(port_mmio
+ PORT_SCR_ACT
),
1172 le32_to_cpu(f
[0]), le32_to_cpu(f
[1]),
1173 pp
->ncq_saw_spurious_sdb_cnt
< 10 ?
1174 "" : ", shutting up");
1176 pp
->ncq_saw_spurious_sdb_cnt
++;
1181 ata_port_printk(ap
, KERN_INFO
, "spurious interrupt "
1182 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
1183 status
, ap
->active_tag
, ap
->sactive
);
1186 static void ahci_irq_clear(struct ata_port
*ap
)
1191 static irqreturn_t
ahci_interrupt(int irq
, void *dev_instance
)
1193 struct ata_host
*host
= dev_instance
;
1194 struct ahci_host_priv
*hpriv
;
1195 unsigned int i
, handled
= 0;
1197 u32 irq_stat
, irq_ack
= 0;
1201 hpriv
= host
->private_data
;
1202 mmio
= host
->iomap
[AHCI_PCI_BAR
];
1204 /* sigh. 0xffffffff is a valid return from h/w */
1205 irq_stat
= readl(mmio
+ HOST_IRQ_STAT
);
1206 irq_stat
&= hpriv
->port_map
;
1210 spin_lock(&host
->lock
);
1212 for (i
= 0; i
< host
->n_ports
; i
++) {
1213 struct ata_port
*ap
;
1215 if (!(irq_stat
& (1 << i
)))
1218 ap
= host
->ports
[i
];
1221 VPRINTK("port %u\n", i
);
1223 VPRINTK("port %u (no irq)\n", i
);
1224 if (ata_ratelimit())
1225 dev_printk(KERN_WARNING
, host
->dev
,
1226 "interrupt on disabled port %u\n", i
);
1229 irq_ack
|= (1 << i
);
1233 writel(irq_ack
, mmio
+ HOST_IRQ_STAT
);
1237 spin_unlock(&host
->lock
);
1241 return IRQ_RETVAL(handled
);
1244 static unsigned int ahci_qc_issue(struct ata_queued_cmd
*qc
)
1246 struct ata_port
*ap
= qc
->ap
;
1247 void __iomem
*port_mmio
= ap
->ioaddr
.cmd_addr
;
1249 if (qc
->tf
.protocol
== ATA_PROT_NCQ
)
1250 writel(1 << qc
->tag
, port_mmio
+ PORT_SCR_ACT
);
1251 writel(1 << qc
->tag
, port_mmio
+ PORT_CMD_ISSUE
);
1252 readl(port_mmio
+ PORT_CMD_ISSUE
); /* flush */
1257 static void ahci_freeze(struct ata_port
*ap
)
1259 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1260 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1263 writel(0, port_mmio
+ PORT_IRQ_MASK
);
1266 static void ahci_thaw(struct ata_port
*ap
)
1268 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1269 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1273 tmp
= readl(port_mmio
+ PORT_IRQ_STAT
);
1274 writel(tmp
, port_mmio
+ PORT_IRQ_STAT
);
1275 writel(1 << ap
->port_no
, mmio
+ HOST_IRQ_STAT
);
1277 /* turn IRQ back on */
1278 writel(DEF_PORT_IRQ
, port_mmio
+ PORT_IRQ_MASK
);
1281 static void ahci_error_handler(struct ata_port
*ap
)
1283 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1284 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1286 if (!(ap
->pflags
& ATA_PFLAG_FROZEN
)) {
1287 /* restart engine */
1288 ahci_stop_engine(port_mmio
);
1289 ahci_start_engine(port_mmio
);
1292 /* perform recovery */
1293 ata_do_eh(ap
, ata_std_prereset
, ahci_softreset
, ahci_hardreset
,
1297 static void ahci_vt8251_error_handler(struct ata_port
*ap
)
1299 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1300 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1302 if (!(ap
->pflags
& ATA_PFLAG_FROZEN
)) {
1303 /* restart engine */
1304 ahci_stop_engine(port_mmio
);
1305 ahci_start_engine(port_mmio
);
1308 /* perform recovery */
1309 ata_do_eh(ap
, ata_std_prereset
, ahci_softreset
, ahci_vt8251_hardreset
,
1313 static void ahci_post_internal_cmd(struct ata_queued_cmd
*qc
)
1315 struct ata_port
*ap
= qc
->ap
;
1316 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1317 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1319 if (qc
->flags
& ATA_QCFLAG_FAILED
)
1320 qc
->err_mask
|= AC_ERR_OTHER
;
1323 /* make DMA engine forget about the failed command */
1324 ahci_stop_engine(port_mmio
);
1325 ahci_start_engine(port_mmio
);
1329 static int ahci_port_suspend(struct ata_port
*ap
, pm_message_t mesg
)
1331 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
1332 struct ahci_port_priv
*pp
= ap
->private_data
;
1333 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1334 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1335 const char *emsg
= NULL
;
1338 rc
= ahci_deinit_port(port_mmio
, hpriv
->cap
, &emsg
);
1340 ahci_power_down(port_mmio
, hpriv
->cap
);
1342 ata_port_printk(ap
, KERN_ERR
, "%s (%d)\n", emsg
, rc
);
1343 ahci_init_port(port_mmio
, hpriv
->cap
,
1344 pp
->cmd_slot_dma
, pp
->rx_fis_dma
);
1350 static int ahci_port_resume(struct ata_port
*ap
)
1352 struct ahci_port_priv
*pp
= ap
->private_data
;
1353 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
1354 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1355 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1357 ahci_power_up(port_mmio
, hpriv
->cap
);
1358 ahci_init_port(port_mmio
, hpriv
->cap
, pp
->cmd_slot_dma
, pp
->rx_fis_dma
);
1363 static int ahci_pci_device_suspend(struct pci_dev
*pdev
, pm_message_t mesg
)
1365 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
1366 void __iomem
*mmio
= host
->iomap
[AHCI_PCI_BAR
];
1369 if (mesg
.event
== PM_EVENT_SUSPEND
) {
1370 /* AHCI spec rev1.1 section 8.3.3:
1371 * Software must disable interrupts prior to requesting a
1372 * transition of the HBA to D3 state.
1374 ctl
= readl(mmio
+ HOST_CTL
);
1375 ctl
&= ~HOST_IRQ_EN
;
1376 writel(ctl
, mmio
+ HOST_CTL
);
1377 readl(mmio
+ HOST_CTL
); /* flush */
1380 return ata_pci_device_suspend(pdev
, mesg
);
1383 static int ahci_pci_device_resume(struct pci_dev
*pdev
)
1385 struct ata_host
*host
= dev_get_drvdata(&pdev
->dev
);
1386 struct ahci_host_priv
*hpriv
= host
->private_data
;
1387 void __iomem
*mmio
= host
->iomap
[AHCI_PCI_BAR
];
1390 rc
= ata_pci_device_do_resume(pdev
);
1394 if (pdev
->dev
.power
.power_state
.event
== PM_EVENT_SUSPEND
) {
1395 rc
= ahci_reset_controller(mmio
, pdev
);
1399 ahci_init_controller(mmio
, pdev
, host
->n_ports
,
1400 host
->ports
[0]->flags
, hpriv
);
1403 ata_host_resume(host
);
1408 static int ahci_port_start(struct ata_port
*ap
)
1410 struct device
*dev
= ap
->host
->dev
;
1411 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
1412 struct ahci_port_priv
*pp
;
1413 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1414 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1419 pp
= devm_kzalloc(dev
, sizeof(*pp
), GFP_KERNEL
);
1423 rc
= ata_pad_alloc(ap
, dev
);
1427 mem
= dmam_alloc_coherent(dev
, AHCI_PORT_PRIV_DMA_SZ
, &mem_dma
,
1431 memset(mem
, 0, AHCI_PORT_PRIV_DMA_SZ
);
1434 * First item in chunk of DMA memory: 32-slot command table,
1435 * 32 bytes each in size
1438 pp
->cmd_slot_dma
= mem_dma
;
1440 mem
+= AHCI_CMD_SLOT_SZ
;
1441 mem_dma
+= AHCI_CMD_SLOT_SZ
;
1444 * Second item: Received-FIS area
1447 pp
->rx_fis_dma
= mem_dma
;
1449 mem
+= AHCI_RX_FIS_SZ
;
1450 mem_dma
+= AHCI_RX_FIS_SZ
;
1453 * Third item: data area for storing a single command
1454 * and its scatter-gather table
1457 pp
->cmd_tbl_dma
= mem_dma
;
1459 ap
->private_data
= pp
;
1462 ahci_power_up(port_mmio
, hpriv
->cap
);
1464 /* initialize port */
1465 ahci_init_port(port_mmio
, hpriv
->cap
, pp
->cmd_slot_dma
, pp
->rx_fis_dma
);
1470 static void ahci_port_stop(struct ata_port
*ap
)
1472 struct ahci_host_priv
*hpriv
= ap
->host
->private_data
;
1473 void __iomem
*mmio
= ap
->host
->iomap
[AHCI_PCI_BAR
];
1474 void __iomem
*port_mmio
= ahci_port_base(mmio
, ap
->port_no
);
1475 const char *emsg
= NULL
;
1478 /* de-initialize port */
1479 rc
= ahci_deinit_port(port_mmio
, hpriv
->cap
, &emsg
);
1481 ata_port_printk(ap
, KERN_WARNING
, "%s (%d)\n", emsg
, rc
);
1484 static void ahci_setup_port(struct ata_ioports
*port
, void __iomem
*base
,
1485 unsigned int port_idx
)
1487 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base
, port_idx
);
1488 base
= ahci_port_base(base
, port_idx
);
1489 VPRINTK("base now==0x%lx\n", base
);
1491 port
->cmd_addr
= base
;
1492 port
->scr_addr
= base
+ PORT_SCR
;
1497 static int ahci_host_init(struct ata_probe_ent
*probe_ent
)
1499 struct ahci_host_priv
*hpriv
= probe_ent
->private_data
;
1500 struct pci_dev
*pdev
= to_pci_dev(probe_ent
->dev
);
1501 void __iomem
*mmio
= probe_ent
->iomap
[AHCI_PCI_BAR
];
1502 unsigned int i
, cap_n_ports
, using_dac
;
1505 rc
= ahci_reset_controller(mmio
, pdev
);
1509 hpriv
->cap
= readl(mmio
+ HOST_CAP
);
1510 hpriv
->port_map
= readl(mmio
+ HOST_PORTS_IMPL
);
1511 cap_n_ports
= ahci_nr_ports(hpriv
->cap
);
1513 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
1514 hpriv
->cap
, hpriv
->port_map
, cap_n_ports
);
1516 if (probe_ent
->port_flags
& AHCI_FLAG_HONOR_PI
) {
1517 unsigned int n_ports
= cap_n_ports
;
1518 u32 port_map
= hpriv
->port_map
;
1521 for (i
= 0; i
< AHCI_MAX_PORTS
&& n_ports
; i
++) {
1522 if (port_map
& (1 << i
)) {
1524 port_map
&= ~(1 << i
);
1527 probe_ent
->dummy_port_mask
|= 1 << i
;
1530 if (n_ports
|| port_map
)
1531 dev_printk(KERN_WARNING
, &pdev
->dev
,
1532 "nr_ports (%u) and implemented port map "
1533 "(0x%x) don't match\n",
1534 cap_n_ports
, hpriv
->port_map
);
1536 probe_ent
->n_ports
= max_port
+ 1;
1538 probe_ent
->n_ports
= cap_n_ports
;
1540 using_dac
= hpriv
->cap
& HOST_CAP_64
;
1542 !pci_set_dma_mask(pdev
, DMA_64BIT_MASK
)) {
1543 rc
= pci_set_consistent_dma_mask(pdev
, DMA_64BIT_MASK
);
1545 rc
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
);
1547 dev_printk(KERN_ERR
, &pdev
->dev
,
1548 "64-bit DMA enable failed\n");
1553 rc
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
);
1555 dev_printk(KERN_ERR
, &pdev
->dev
,
1556 "32-bit DMA enable failed\n");
1559 rc
= pci_set_consistent_dma_mask(pdev
, DMA_32BIT_MASK
);
1561 dev_printk(KERN_ERR
, &pdev
->dev
,
1562 "32-bit consistent DMA enable failed\n");
1567 for (i
= 0; i
< probe_ent
->n_ports
; i
++)
1568 ahci_setup_port(&probe_ent
->port
[i
], mmio
, i
);
1570 ahci_init_controller(mmio
, pdev
, probe_ent
->n_ports
,
1571 probe_ent
->port_flags
, hpriv
);
1573 pci_set_master(pdev
);
1578 static void ahci_print_info(struct ata_probe_ent
*probe_ent
)
1580 struct ahci_host_priv
*hpriv
= probe_ent
->private_data
;
1581 struct pci_dev
*pdev
= to_pci_dev(probe_ent
->dev
);
1582 void __iomem
*mmio
= probe_ent
->iomap
[AHCI_PCI_BAR
];
1583 u32 vers
, cap
, impl
, speed
;
1584 const char *speed_s
;
1588 vers
= readl(mmio
+ HOST_VERSION
);
1590 impl
= hpriv
->port_map
;
1592 speed
= (cap
>> 20) & 0xf;
1595 else if (speed
== 2)
1600 pci_read_config_word(pdev
, 0x0a, &cc
);
1601 if (cc
== PCI_CLASS_STORAGE_IDE
)
1603 else if (cc
== PCI_CLASS_STORAGE_SATA
)
1605 else if (cc
== PCI_CLASS_STORAGE_RAID
)
1610 dev_printk(KERN_INFO
, &pdev
->dev
,
1611 "AHCI %02x%02x.%02x%02x "
1612 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1615 (vers
>> 24) & 0xff,
1616 (vers
>> 16) & 0xff,
1620 ((cap
>> 8) & 0x1f) + 1,
1626 dev_printk(KERN_INFO
, &pdev
->dev
,
1632 cap
& (1 << 31) ? "64bit " : "",
1633 cap
& (1 << 30) ? "ncq " : "",
1634 cap
& (1 << 28) ? "ilck " : "",
1635 cap
& (1 << 27) ? "stag " : "",
1636 cap
& (1 << 26) ? "pm " : "",
1637 cap
& (1 << 25) ? "led " : "",
1639 cap
& (1 << 24) ? "clo " : "",
1640 cap
& (1 << 19) ? "nz " : "",
1641 cap
& (1 << 18) ? "only " : "",
1642 cap
& (1 << 17) ? "pmp " : "",
1643 cap
& (1 << 15) ? "pio " : "",
1644 cap
& (1 << 14) ? "slum " : "",
1645 cap
& (1 << 13) ? "part " : ""
1649 static int ahci_init_one(struct pci_dev
*pdev
, const struct pci_device_id
*ent
)
1651 static int printed_version
;
1652 unsigned int board_idx
= (unsigned int) ent
->driver_data
;
1653 struct device
*dev
= &pdev
->dev
;
1654 struct ata_probe_ent
*probe_ent
;
1655 struct ahci_host_priv
*hpriv
;
1660 WARN_ON(ATA_MAX_QUEUE
> AHCI_MAX_CMDS
);
1662 if (!printed_version
++)
1663 dev_printk(KERN_DEBUG
, &pdev
->dev
, "version " DRV_VERSION
"\n");
1665 if (pdev
->vendor
== PCI_VENDOR_ID_JMICRON
) {
1666 /* Function 1 is the PATA controller except on the 368, where
1667 we are not AHCI anyway */
1668 if (PCI_FUNC(pdev
->devfn
))
1672 rc
= pcim_enable_device(pdev
);
1676 rc
= pcim_iomap_regions(pdev
, 1 << AHCI_PCI_BAR
, DRV_NAME
);
1678 pcim_pin_device(pdev
);
1682 if (pci_enable_msi(pdev
))
1685 probe_ent
= devm_kzalloc(dev
, sizeof(*probe_ent
), GFP_KERNEL
);
1686 if (probe_ent
== NULL
)
1689 probe_ent
->dev
= pci_dev_to_dev(pdev
);
1690 INIT_LIST_HEAD(&probe_ent
->node
);
1692 hpriv
= devm_kzalloc(dev
, sizeof(*hpriv
), GFP_KERNEL
);
1696 probe_ent
->sht
= ahci_port_info
[board_idx
].sht
;
1697 probe_ent
->port_flags
= ahci_port_info
[board_idx
].flags
;
1698 probe_ent
->pio_mask
= ahci_port_info
[board_idx
].pio_mask
;
1699 probe_ent
->udma_mask
= ahci_port_info
[board_idx
].udma_mask
;
1700 probe_ent
->port_ops
= ahci_port_info
[board_idx
].port_ops
;
1702 probe_ent
->irq
= pdev
->irq
;
1703 probe_ent
->irq_flags
= IRQF_SHARED
;
1704 probe_ent
->iomap
= pcim_iomap_table(pdev
);
1705 probe_ent
->private_data
= hpriv
;
1707 /* initialize adapter */
1708 rc
= ahci_host_init(probe_ent
);
1712 if (!(probe_ent
->port_flags
& AHCI_FLAG_NO_NCQ
) &&
1713 (hpriv
->cap
& HOST_CAP_NCQ
))
1714 probe_ent
->port_flags
|= ATA_FLAG_NCQ
;
1716 ahci_print_info(probe_ent
);
1718 if (!ata_device_add(probe_ent
))
1721 devm_kfree(dev
, probe_ent
);
1725 static int __init
ahci_init(void)
1727 return pci_register_driver(&ahci_pci_driver
);
1730 static void __exit
ahci_exit(void)
1732 pci_unregister_driver(&ahci_pci_driver
);
1736 MODULE_AUTHOR("Jeff Garzik");
1737 MODULE_DESCRIPTION("AHCI SATA low-level driver");
1738 MODULE_LICENSE("GPL");
1739 MODULE_DEVICE_TABLE(pci
, ahci_pci_tbl
);
1740 MODULE_VERSION(DRV_VERSION
);
1742 module_init(ahci_init
);
1743 module_exit(ahci_exit
);