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sata_promise: fix error decode regression
[linux-block.git] / drivers / ata / ahci.c
CommitLineData
1da177e4
LT		 1/*
2 * ahci.c - AHCI SATA support
3 *
af36d7f0
JG		 4 * Maintained by: Jeff Garzik <jgarzik@pobox.com>
5 * Please ALWAYS copy linux-ide@vger.kernel.org
6 * on emails.
7 *
8 * Copyright 2004-2005 Red Hat, Inc.
9 *
10 *
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)
14 * any later version.
15 *
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.
20 *
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.
24 *
25 *
26 * libata documentation is available via 'make {ps|pdf}docs',
27 * as Documentation/DocBook/libata.*
28 *
29 * AHCI hardware documentation:
1da177e4 30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
af36d7f0 31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
1da177e4
LT		 32 *
33 */
34
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>
87507cfd 42#include <linux/dma-mapping.h>
a9524a76 43#include <linux/device.h>
1da177e4 44#include <scsi/scsi_host.h>
193515d5 45#include <scsi/scsi_cmnd.h>
1da177e4 46#include <linux/libata.h>
1da177e4
LT		 47
48#define DRV_NAME "ahci"
cb48cab7 49#define DRV_VERSION "2.1"
1da177e4
LT		 50
51
52enum {
53 AHCI_PCI_BAR = 5,
648a88be 54 AHCI_MAX_PORTS = 32,
1da177e4
LT		 55 AHCI_MAX_SG = 168, /* hardware max is 64K */
56 AHCI_DMA_BOUNDARY = 0xffffffff,
57 AHCI_USE_CLUSTERING = 0,
12fad3f9 58 AHCI_MAX_CMDS = 32,
dd410ff1 59 AHCI_CMD_SZ = 32,
12fad3f9 60 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
1da177e4 61 AHCI_RX_FIS_SZ = 256,
a0ea7328 62 AHCI_CMD_TBL_CDB = 0x40,
dd410ff1
TH		 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 +
1da177e4
LT		 67 AHCI_RX_FIS_SZ,
68 AHCI_IRQ_ON_SG = (1 << 31),
69 AHCI_CMD_ATAPI = (1 << 5),
70 AHCI_CMD_WRITE = (1 << 6),
4b10e559 71 AHCI_CMD_PREFETCH = (1 << 7),
22b49985
TH		 72 AHCI_CMD_RESET = (1 << 8),
73 AHCI_CMD_CLR_BUSY = (1 << 10),
1da177e4
LT		 74
75 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
0291f95f 76 RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
78cd52d0 77 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
1da177e4
LT		 78
79 board_ahci = 0,
648a88be
TH		 80 board_ahci_pi = 1,
81 board_ahci_vt8251 = 2,
82 board_ahci_ign_iferr = 3,
55a61604 83 board_ahci_sb600 = 4,
1da177e4
LT		 84
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 */
91
92 /* HOST_CTL bits */
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 */
96
97 /* HOST_CAP bits */
0be0aa98 98 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
22b49985 99 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
0be0aa98 100 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
979db803 101 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
dd410ff1 102 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
1da177e4
LT		 103
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 */
120
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 */
130
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 */
140
78cd52d0
TH		 141 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
142 PORT_IRQ_IF_ERR |
143 PORT_IRQ_CONNECT |
4296971d 144 PORT_IRQ_PHYRDY |
78cd52d0
TH		 145 PORT_IRQ_UNK_FIS,
146 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
147 PORT_IRQ_TF_ERR |
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,
1da177e4
LT		 152
153 /* PORT_CMD bits */
02eaa666 154 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
1da177e4
LT		 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 */
22b49985 158 PORT_CMD_CLO = (1 << 3), /* Command list override */
1da177e4
LT		 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 */
162
0be0aa98 163 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
1da177e4
LT		 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 */
4b0060f4 167
bf2af2a2 168 /* ap->flags bits */
4aeb0e32
TH		 169 AHCI_FLAG_NO_NCQ = (1 << 24),
170 AHCI_FLAG_IGN_IRQ_IF_ERR = (1 << 25), /* ignore IRQ_IF_ERR */
648a88be 171 AHCI_FLAG_HONOR_PI = (1 << 26), /* honor PORTS_IMPL */
55a61604 172 AHCI_FLAG_IGN_SERR_INTERNAL = (1 << 27), /* ignore SERR_INTERNAL */
1da177e4
LT		 173};
174
175struct ahci_cmd_hdr {
176 u32 opts;
177 u32 status;
178 u32 tbl_addr;
179 u32 tbl_addr_hi;
180 u32 reserved[4];
181};
182
183struct ahci_sg {
184 u32 addr;
185 u32 addr_hi;
186 u32 reserved;
187 u32 flags_size;
188};
189
190struct ahci_host_priv {
1da177e4
LT		 191 u32 cap; /* cache of HOST_CAP register */
192 u32 port_map; /* cache of HOST_PORTS_IMPL reg */
193};
194
195struct ahci_port_priv {
196 struct ahci_cmd_hdr *cmd_slot;
197 dma_addr_t cmd_slot_dma;
198 void *cmd_tbl;
199 dma_addr_t cmd_tbl_dma;
1da177e4
LT		 200 void *rx_fis;
201 dma_addr_t rx_fis_dma;
0291f95f 202 /* for NCQ spurious interrupt analysis */
0291f95f
TH		 203 unsigned int ncq_saw_d2h:1;
204 unsigned int ncq_saw_dmas:1;
afb2d552 205 unsigned int ncq_saw_sdb:1;
1da177e4
LT		 206};
207
208static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg);
209static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg, u32 val);
210static int ahci_init_one (struct pci_dev *pdev, const struct pci_device_id *ent);
9a3d9eb0 211static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
7d12e780 212static irqreturn_t ahci_interrupt (int irq, void *dev_instance);
1da177e4 213static void ahci_irq_clear(struct ata_port *ap);
1da177e4
LT		 214static int ahci_port_start(struct ata_port *ap);
215static void ahci_port_stop(struct ata_port *ap);
1da177e4
LT		 216static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf);
217static void ahci_qc_prep(struct ata_queued_cmd *qc);
218static u8 ahci_check_status(struct ata_port *ap);
78cd52d0
TH		 219static void ahci_freeze(struct ata_port *ap);
220static void ahci_thaw(struct ata_port *ap);
221static void ahci_error_handler(struct ata_port *ap);
ad616ffb 222static void ahci_vt8251_error_handler(struct ata_port *ap);
78cd52d0 223static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
438ac6d5 224#ifdef CONFIG_PM
c1332875
TH		 225static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
226static int ahci_port_resume(struct ata_port *ap);
227static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
228static int ahci_pci_device_resume(struct pci_dev *pdev);
438ac6d5 229#endif
1da177e4 230
193515d5 231static struct scsi_host_template ahci_sht = {
1da177e4
LT		 232 .module = THIS_MODULE,
233 .name = DRV_NAME,
234 .ioctl = ata_scsi_ioctl,
235 .queuecommand = ata_scsi_queuecmd,
12fad3f9
TH		 236 .change_queue_depth = ata_scsi_change_queue_depth,
237 .can_queue = AHCI_MAX_CMDS - 1,
1da177e4
LT		 238 .this_id = ATA_SHT_THIS_ID,
239 .sg_tablesize = AHCI_MAX_SG,
1da177e4
LT		 240 .cmd_per_lun = ATA_SHT_CMD_PER_LUN,
241 .emulated = ATA_SHT_EMULATED,
242 .use_clustering = AHCI_USE_CLUSTERING,
243 .proc_name = DRV_NAME,
244 .dma_boundary = AHCI_DMA_BOUNDARY,
245 .slave_configure = ata_scsi_slave_config,
ccf68c34 246 .slave_destroy = ata_scsi_slave_destroy,
1da177e4 247 .bios_param = ata_std_bios_param,
438ac6d5 248#ifdef CONFIG_PM
c1332875
TH		 249 .suspend = ata_scsi_device_suspend,
250 .resume = ata_scsi_device_resume,
438ac6d5 251#endif
1da177e4
LT		 252};
253
057ace5e 254static const struct ata_port_operations ahci_ops = {
1da177e4
LT		 255 .port_disable = ata_port_disable,
256
257 .check_status = ahci_check_status,
258 .check_altstatus = ahci_check_status,
1da177e4
LT		 259 .dev_select = ata_noop_dev_select,
260
261 .tf_read = ahci_tf_read,
262
1da177e4
LT		 263 .qc_prep = ahci_qc_prep,
264 .qc_issue = ahci_qc_issue,
265
1da177e4
LT		 266 .irq_handler = ahci_interrupt,
267 .irq_clear = ahci_irq_clear,
246ce3b6
AI		 268 .irq_on = ata_dummy_irq_on,
269 .irq_ack = ata_dummy_irq_ack,
1da177e4
LT		 270
271 .scr_read = ahci_scr_read,
272 .scr_write = ahci_scr_write,
273
78cd52d0
TH		 274 .freeze = ahci_freeze,
275 .thaw = ahci_thaw,
276
277 .error_handler = ahci_error_handler,
278 .post_internal_cmd = ahci_post_internal_cmd,
279
438ac6d5 280#ifdef CONFIG_PM
c1332875
TH		 281 .port_suspend = ahci_port_suspend,
282 .port_resume = ahci_port_resume,
438ac6d5 283#endif
c1332875 284
1da177e4
LT		 285 .port_start = ahci_port_start,
286 .port_stop = ahci_port_stop,
1da177e4
LT		 287};
288
ad616ffb
TH		 289static const struct ata_port_operations ahci_vt8251_ops = {
290 .port_disable = ata_port_disable,
291
292 .check_status = ahci_check_status,
293 .check_altstatus = ahci_check_status,
294 .dev_select = ata_noop_dev_select,
295
296 .tf_read = ahci_tf_read,
297
298 .qc_prep = ahci_qc_prep,
299 .qc_issue = ahci_qc_issue,
300
301 .irq_handler = ahci_interrupt,
302 .irq_clear = ahci_irq_clear,
246ce3b6
AI		 303 .irq_on = ata_dummy_irq_on,
304 .irq_ack = ata_dummy_irq_ack,
ad616ffb
TH		 305
306 .scr_read = ahci_scr_read,
307 .scr_write = ahci_scr_write,
308
309 .freeze = ahci_freeze,
310 .thaw = ahci_thaw,
311
312 .error_handler = ahci_vt8251_error_handler,
313 .post_internal_cmd = ahci_post_internal_cmd,
314
438ac6d5 315#ifdef CONFIG_PM
ad616ffb
TH		 316 .port_suspend = ahci_port_suspend,
317 .port_resume = ahci_port_resume,
438ac6d5 318#endif
ad616ffb
TH		 319
320 .port_start = ahci_port_start,
321 .port_stop = ahci_port_stop,
322};
323
98ac62de 324static const struct ata_port_info ahci_port_info[] = {
1da177e4
LT		 325 /* board_ahci */
326 {
327 .sht = &ahci_sht,
cca3974e 328 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
4296971d
TH		 329 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
330 ATA_FLAG_SKIP_D2H_BSY,
7da79312 331 .pio_mask = 0x1f, /* pio0-4 */
1da177e4
LT		 332 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
333 .port_ops = &ahci_ops,
334 },
648a88be
TH		 335 /* board_ahci_pi */
336 {
337 .sht = &ahci_sht,
338 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
339 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
340 ATA_FLAG_SKIP_D2H_BSY | AHCI_FLAG_HONOR_PI,
341 .pio_mask = 0x1f, /* pio0-4 */
342 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
343 .port_ops = &ahci_ops,
344 },
bf2af2a2
BJ		 345 /* board_ahci_vt8251 */
346 {
347 .sht = &ahci_sht,
cca3974e 348 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
bf2af2a2 349 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
ad616ffb
TH		 350 ATA_FLAG_SKIP_D2H_BSY |
351 ATA_FLAG_HRST_TO_RESUME | AHCI_FLAG_NO_NCQ,
bf2af2a2
BJ		 352 .pio_mask = 0x1f, /* pio0-4 */
353 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
ad616ffb 354 .port_ops = &ahci_vt8251_ops,
bf2af2a2 355 },
41669553
TH		 356 /* board_ahci_ign_iferr */
357 {
358 .sht = &ahci_sht,
359 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
360 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
361 ATA_FLAG_SKIP_D2H_BSY |
362 AHCI_FLAG_IGN_IRQ_IF_ERR,
363 .pio_mask = 0x1f, /* pio0-4 */
364 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
365 .port_ops = &ahci_ops,
366 },
55a61604
CH		 367 /* board_ahci_sb600 */
368 {
369 .sht = &ahci_sht,
370 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
371 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
372 ATA_FLAG_SKIP_D2H_BSY |
373 AHCI_FLAG_IGN_SERR_INTERNAL,
374 .pio_mask = 0x1f, /* pio0-4 */
375 .udma_mask = 0x7f, /* udma0-6 ; FIXME */
376 .port_ops = &ahci_ops,
377 },
378
1da177e4
LT		 379};
380
3b7d697d 381static const struct pci_device_id ahci_pci_tbl[] = {
fe7fa31a 382 /* Intel */
54bb3a94
JG		 383 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
384 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
385 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
386 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
387 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
82490c09 388 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
54bb3a94
JG		 389 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
390 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
391 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
392 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
648a88be
TH		 393 { PCI_VDEVICE(INTEL, 0x2821), board_ahci_pi }, /* ICH8 */
394 { PCI_VDEVICE(INTEL, 0x2822), board_ahci_pi }, /* ICH8 */
395 { PCI_VDEVICE(INTEL, 0x2824), board_ahci_pi }, /* ICH8 */
396 { PCI_VDEVICE(INTEL, 0x2829), board_ahci_pi }, /* ICH8M */
397 { PCI_VDEVICE(INTEL, 0x282a), board_ahci_pi }, /* ICH8M */
398 { PCI_VDEVICE(INTEL, 0x2922), board_ahci_pi }, /* ICH9 */
399 { PCI_VDEVICE(INTEL, 0x2923), board_ahci_pi }, /* ICH9 */
400 { PCI_VDEVICE(INTEL, 0x2924), board_ahci_pi }, /* ICH9 */
401 { PCI_VDEVICE(INTEL, 0x2925), board_ahci_pi }, /* ICH9 */
402 { PCI_VDEVICE(INTEL, 0x2927), board_ahci_pi }, /* ICH9 */
403 { PCI_VDEVICE(INTEL, 0x2929), board_ahci_pi }, /* ICH9M */
404 { PCI_VDEVICE(INTEL, 0x292a), board_ahci_pi }, /* ICH9M */
405 { PCI_VDEVICE(INTEL, 0x292b), board_ahci_pi }, /* ICH9M */
8af12cdb 406 { PCI_VDEVICE(INTEL, 0x292c), board_ahci_pi }, /* ICH9M */
648a88be
TH		 407 { PCI_VDEVICE(INTEL, 0x292f), board_ahci_pi }, /* ICH9M */
408 { PCI_VDEVICE(INTEL, 0x294d), board_ahci_pi }, /* ICH9 */
409 { PCI_VDEVICE(INTEL, 0x294e), board_ahci_pi }, /* ICH9M */
fe7fa31a 410
e34bb370
TH		 411 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
412 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
413 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
fe7fa31a
JG		 414
415 /* ATI */
55a61604 416 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 non-raid */
54bb3a94 417 { PCI_VDEVICE(ATI, 0x4381), board_ahci }, /* ATI SB600 raid */
fe7fa31a
JG		 418
419 /* VIA */
54bb3a94 420 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
fe7fa31a
JG		 421
422 /* NVIDIA */
54bb3a94
JG		 423 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
424 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
425 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
426 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
6fbf5ba4
PC		 427 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
428 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
429 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
430 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
431 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
432 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
433 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
434 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
895663cd
PC		 435 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
436 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
437 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
438 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
439 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
440 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
441 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
442 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
fe7fa31a 443
95916edd 444 /* SiS */
54bb3a94
JG		 445 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
446 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
447 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
95916edd 448
415ae2b5
JG		 449 /* Generic, PCI class code for AHCI */
450 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
c9f89475 451 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
415ae2b5 452
1da177e4
LT		 453 { } /* terminate list */
454};
455
456
457static struct pci_driver ahci_pci_driver = {
458 .name = DRV_NAME,
459 .id_table = ahci_pci_tbl,
460 .probe = ahci_init_one,
24dc5f33 461 .remove = ata_pci_remove_one,
438ac6d5 462#ifdef CONFIG_PM
c1332875
TH		 463 .suspend = ahci_pci_device_suspend,
464 .resume = ahci_pci_device_resume,
438ac6d5 465#endif
1da177e4
LT		 466};
467
468
98fa4b60
TH		 469static inline int ahci_nr_ports(u32 cap)
470{
471 return (cap & 0x1f) + 1;
472}
473
0d5ff566
TH		 474static inline void __iomem *ahci_port_base(void __iomem *base,
475 unsigned int port)
1da177e4
LT		 476{
477 return base + 0x100 + (port * 0x80);
478}
479
1da177e4
LT		 480static u32 ahci_scr_read (struct ata_port *ap, unsigned int sc_reg_in)
481{
482 unsigned int sc_reg;
483
484 switch (sc_reg_in) {
485 case SCR_STATUS: sc_reg = 0; break;
486 case SCR_CONTROL: sc_reg = 1; break;
487 case SCR_ERROR: sc_reg = 2; break;
488 case SCR_ACTIVE: sc_reg = 3; break;
489 default:
490 return 0xffffffffU;
491 }
492
0d5ff566 493 return readl(ap->ioaddr.scr_addr + (sc_reg * 4));
1da177e4
LT		 494}
495
496
497static void ahci_scr_write (struct ata_port *ap, unsigned int sc_reg_in,
498 u32 val)
499{
500 unsigned int sc_reg;
501
502 switch (sc_reg_in) {
503 case SCR_STATUS: sc_reg = 0; break;
504 case SCR_CONTROL: sc_reg = 1; break;
505 case SCR_ERROR: sc_reg = 2; break;
506 case SCR_ACTIVE: sc_reg = 3; break;
507 default:
508 return;
509 }
510
0d5ff566 511 writel(val, ap->ioaddr.scr_addr + (sc_reg * 4));
1da177e4
LT		 512}
513
9f592056 514static void ahci_start_engine(void __iomem *port_mmio)
7c76d1e8 515{
7c76d1e8
TH		 516 u32 tmp;
517
d8fcd116 518 /* start DMA */
9f592056 519 tmp = readl(port_mmio + PORT_CMD);
7c76d1e8
TH		 520 tmp |= PORT_CMD_START;
521 writel(tmp, port_mmio + PORT_CMD);
522 readl(port_mmio + PORT_CMD); /* flush */
523}
524
254950cd
TH		 525static int ahci_stop_engine(void __iomem *port_mmio)
526{
527 u32 tmp;
528
529 tmp = readl(port_mmio + PORT_CMD);
530
d8fcd116 531 /* check if the HBA is idle */
254950cd
TH		 532 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
533 return 0;
534
d8fcd116 535 /* setting HBA to idle */
254950cd
TH		 536 tmp &= ~PORT_CMD_START;
537 writel(tmp, port_mmio + PORT_CMD);
538
d8fcd116 539 /* wait for engine to stop. This could be as long as 500 msec */
254950cd
TH		 540 tmp = ata_wait_register(port_mmio + PORT_CMD,
541 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
d8fcd116 542 if (tmp & PORT_CMD_LIST_ON)
254950cd
TH		 543 return -EIO;
544
545 return 0;
546}
547
0be0aa98
TH		 548static void ahci_start_fis_rx(void __iomem *port_mmio, u32 cap,
549 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
550{
551 u32 tmp;
552
553 /* set FIS registers */
554 if (cap & HOST_CAP_64)
555 writel((cmd_slot_dma >> 16) >> 16, port_mmio + PORT_LST_ADDR_HI);
556 writel(cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
557
558 if (cap & HOST_CAP_64)
559 writel((rx_fis_dma >> 16) >> 16, port_mmio + PORT_FIS_ADDR_HI);
560 writel(rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
561
562 /* enable FIS reception */
563 tmp = readl(port_mmio + PORT_CMD);
564 tmp |= PORT_CMD_FIS_RX;
565 writel(tmp, port_mmio + PORT_CMD);
566
567 /* flush */
568 readl(port_mmio + PORT_CMD);
569}
570
571static int ahci_stop_fis_rx(void __iomem *port_mmio)
572{
573 u32 tmp;
574
575 /* disable FIS reception */
576 tmp = readl(port_mmio + PORT_CMD);
577 tmp &= ~PORT_CMD_FIS_RX;
578 writel(tmp, port_mmio + PORT_CMD);
579
580 /* wait for completion, spec says 500ms, give it 1000 */
581 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
582 PORT_CMD_FIS_ON, 10, 1000);
583 if (tmp & PORT_CMD_FIS_ON)
584 return -EBUSY;
585
586 return 0;
587}
588
589static void ahci_power_up(void __iomem *port_mmio, u32 cap)
590{
591 u32 cmd;
592
593 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
594
595 /* spin up device */
596 if (cap & HOST_CAP_SSS) {
597 cmd |= PORT_CMD_SPIN_UP;
598 writel(cmd, port_mmio + PORT_CMD);
599 }
600
601 /* wake up link */
602 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
603}
604
438ac6d5 605#ifdef CONFIG_PM
0be0aa98
TH		 606static void ahci_power_down(void __iomem *port_mmio, u32 cap)
607{
608 u32 cmd, scontrol;
609
07c53dac
TH		 610 if (!(cap & HOST_CAP_SSS))
611 return;
0be0aa98 612
07c53dac
TH		 613 /* put device into listen mode, first set PxSCTL.DET to 0 */
614 scontrol = readl(port_mmio + PORT_SCR_CTL);
615 scontrol &= ~0xf;
616 writel(scontrol, port_mmio + PORT_SCR_CTL);
0be0aa98 617
07c53dac
TH		 618 /* then set PxCMD.SUD to 0 */
619 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
620 cmd &= ~PORT_CMD_SPIN_UP;
621 writel(cmd, port_mmio + PORT_CMD);
0be0aa98 622}
438ac6d5 623#endif
0be0aa98
TH		 624
625static void ahci_init_port(void __iomem *port_mmio, u32 cap,
626 dma_addr_t cmd_slot_dma, dma_addr_t rx_fis_dma)
627{
0be0aa98
TH		 628 /* enable FIS reception */
629 ahci_start_fis_rx(port_mmio, cap, cmd_slot_dma, rx_fis_dma);
630
631 /* enable DMA */
632 ahci_start_engine(port_mmio);
633}
634
635static int ahci_deinit_port(void __iomem *port_mmio, u32 cap, const char **emsg)
636{
637 int rc;
638
639 /* disable DMA */
640 rc = ahci_stop_engine(port_mmio);
641 if (rc) {
642 *emsg = "failed to stop engine";
643 return rc;
644 }
645
646 /* disable FIS reception */
647 rc = ahci_stop_fis_rx(port_mmio);
648 if (rc) {
649 *emsg = "failed stop FIS RX";
650 return rc;
651 }
652
0be0aa98
TH		 653 return 0;
654}
655
d91542c1
TH		 656static int ahci_reset_controller(void __iomem *mmio, struct pci_dev *pdev)
657{
98fa4b60 658 u32 cap_save, impl_save, tmp;
d91542c1
TH		 659
660 cap_save = readl(mmio + HOST_CAP);
98fa4b60 661 impl_save = readl(mmio + HOST_PORTS_IMPL);
d91542c1
TH		 662
663 /* global controller reset */
664 tmp = readl(mmio + HOST_CTL);
665 if ((tmp & HOST_RESET) == 0) {
666 writel(tmp | HOST_RESET, mmio + HOST_CTL);
667 readl(mmio + HOST_CTL); /* flush */
668 }
669
670 /* reset must complete within 1 second, or
671 * the hardware should be considered fried.
672 */
673 ssleep(1);
674
675 tmp = readl(mmio + HOST_CTL);
676 if (tmp & HOST_RESET) {
677 dev_printk(KERN_ERR, &pdev->dev,
678 "controller reset failed (0x%x)\n", tmp);
679 return -EIO;
680 }
681
98fa4b60 682 /* turn on AHCI mode */
d91542c1
TH		 683 writel(HOST_AHCI_EN, mmio + HOST_CTL);
684 (void) readl(mmio + HOST_CTL); /* flush */
98fa4b60
TH		 685
686 /* These write-once registers are normally cleared on reset.
687 * Restore BIOS values... which we HOPE were present before
688 * reset.
689 */
690 if (!impl_save) {
691 impl_save = (1 << ahci_nr_ports(cap_save)) - 1;
692 dev_printk(KERN_WARNING, &pdev->dev,
693 "PORTS_IMPL is zero, forcing 0x%x\n", impl_save);
694 }
d91542c1 695 writel(cap_save, mmio + HOST_CAP);
98fa4b60 696 writel(impl_save, mmio + HOST_PORTS_IMPL);
d91542c1
TH		 697 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
698
699 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
700 u16 tmp16;
701
702 /* configure PCS */
703 pci_read_config_word(pdev, 0x92, &tmp16);
704 tmp16 |= 0xf;
705 pci_write_config_word(pdev, 0x92, tmp16);
706 }
707
708 return 0;
709}
710
711static void ahci_init_controller(void __iomem *mmio, struct pci_dev *pdev,
648a88be
TH		 712 int n_ports, unsigned int port_flags,
713 struct ahci_host_priv *hpriv)
d91542c1
TH		 714{
715 int i, rc;
716 u32 tmp;
717
718 for (i = 0; i < n_ports; i++) {
719 void __iomem *port_mmio = ahci_port_base(mmio, i);
720 const char *emsg = NULL;
721
648a88be
TH		 722 if ((port_flags & AHCI_FLAG_HONOR_PI) &&
723 !(hpriv->port_map & (1 << i)))
d91542c1 724 continue;
d91542c1
TH		 725
726 /* make sure port is not active */
648a88be 727 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
d91542c1
TH		 728 if (rc)
729 dev_printk(KERN_WARNING, &pdev->dev,
730 "%s (%d)\n", emsg, rc);
731
732 /* clear SError */
733 tmp = readl(port_mmio + PORT_SCR_ERR);
734 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
735 writel(tmp, port_mmio + PORT_SCR_ERR);
736
f4b5cc87 737 /* clear port IRQ */
d91542c1
TH		 738 tmp = readl(port_mmio + PORT_IRQ_STAT);
739 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
740 if (tmp)
741 writel(tmp, port_mmio + PORT_IRQ_STAT);
742
743 writel(1 << i, mmio + HOST_IRQ_STAT);
d91542c1
TH		 744 }
745
746 tmp = readl(mmio + HOST_CTL);
747 VPRINTK("HOST_CTL 0x%x\n", tmp);
748 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
749 tmp = readl(mmio + HOST_CTL);
750 VPRINTK("HOST_CTL 0x%x\n", tmp);
751}
752
422b7595 753static unsigned int ahci_dev_classify(struct ata_port *ap)
1da177e4 754{
0d5ff566 755 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1da177e4 756 struct ata_taskfile tf;
422b7595
TH		 757 u32 tmp;
758
759 tmp = readl(port_mmio + PORT_SIG);
760 tf.lbah = (tmp >> 24) & 0xff;
761 tf.lbam = (tmp >> 16) & 0xff;
762 tf.lbal = (tmp >> 8) & 0xff;
763 tf.nsect = (tmp) & 0xff;
764
765 return ata_dev_classify(&tf);
766}
767
12fad3f9
TH		 768static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
769 u32 opts)
cc9278ed 770{
12fad3f9
TH		 771 dma_addr_t cmd_tbl_dma;
772
773 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
774
775 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
776 pp->cmd_slot[tag].status = 0;
777 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
778 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
cc9278ed
TH		 779}
780
bf2af2a2 781static int ahci_clo(struct ata_port *ap)
4658f79b 782{
0d5ff566 783 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
cca3974e 784 struct ahci_host_priv *hpriv = ap->host->private_data;
bf2af2a2
BJ		 785 u32 tmp;
786
787 if (!(hpriv->cap & HOST_CAP_CLO))
788 return -EOPNOTSUPP;
789
790 tmp = readl(port_mmio + PORT_CMD);
791 tmp |= PORT_CMD_CLO;
792 writel(tmp, port_mmio + PORT_CMD);
793
794 tmp = ata_wait_register(port_mmio + PORT_CMD,
795 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
796 if (tmp & PORT_CMD_CLO)
797 return -EIO;
798
799 return 0;
800}
801
802static int ahci_softreset(struct ata_port *ap, unsigned int *class)
803{
4658f79b 804 struct ahci_port_priv *pp = ap->private_data;
0d5ff566 805 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
4658f79b
TH		 806 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
807 const u32 cmd_fis_len = 5; /* five dwords */
808 const char *reason = NULL;
809 struct ata_taskfile tf;
75fe1806 810 u32 tmp;
4658f79b
TH		 811 u8 *fis;
812 int rc;
813
814 DPRINTK("ENTER\n");
815
81952c54 816 if (ata_port_offline(ap)) {
c2a65852
TH		 817 DPRINTK("PHY reports no device\n");
818 *class = ATA_DEV_NONE;
819 return 0;
820 }
821
4658f79b 822 /* prepare for SRST (AHCI-1.1 10.4.1) */
5457f219 823 rc = ahci_stop_engine(port_mmio);
4658f79b
TH		 824 if (rc) {
825 reason = "failed to stop engine";
826 goto fail_restart;
827 }
828
829 /* check BUSY/DRQ, perform Command List Override if necessary */
1244a19c 830 if (ahci_check_status(ap) & (ATA_BUSY | ATA_DRQ)) {
bf2af2a2 831 rc = ahci_clo(ap);
4658f79b 832
bf2af2a2
BJ		 833 if (rc == -EOPNOTSUPP) {
834 reason = "port busy but CLO unavailable";
835 goto fail_restart;
836 } else if (rc) {
837 reason = "port busy but CLO failed";
4658f79b
TH		 838 goto fail_restart;
839 }
840 }
841
842 /* restart engine */
5457f219 843 ahci_start_engine(port_mmio);
4658f79b 844
3373efd8 845 ata_tf_init(ap->device, &tf);
4658f79b
TH		 846 fis = pp->cmd_tbl;
847
848 /* issue the first D2H Register FIS */
12fad3f9
TH		 849 ahci_fill_cmd_slot(pp, 0,
850 cmd_fis_len | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY);
4658f79b
TH		 851
852 tf.ctl |= ATA_SRST;
853 ata_tf_to_fis(&tf, fis, 0);
854 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
855
856 writel(1, port_mmio + PORT_CMD_ISSUE);
4658f79b 857
75fe1806
TH		 858 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1, 1, 500);
859 if (tmp & 0x1) {
4658f79b
TH		 860 rc = -EIO;
861 reason = "1st FIS failed";
862 goto fail;
863 }
864
865 /* spec says at least 5us, but be generous and sleep for 1ms */
866 msleep(1);
867
868 /* issue the second D2H Register FIS */
12fad3f9 869 ahci_fill_cmd_slot(pp, 0, cmd_fis_len);
4658f79b
TH		 870
871 tf.ctl &= ~ATA_SRST;
872 ata_tf_to_fis(&tf, fis, 0);
873 fis[1] &= ~(1 << 7); /* turn off Command FIS bit */
874
875 writel(1, port_mmio + PORT_CMD_ISSUE);
876 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
877
878 /* spec mandates ">= 2ms" before checking status.
879 * We wait 150ms, because that was the magic delay used for
880 * ATAPI devices in Hale Landis's ATADRVR, for the period of time
881 * between when the ATA command register is written, and then
882 * status is checked. Because waiting for "a while" before
883 * checking status is fine, post SRST, we perform this magic
884 * delay here as well.
885 */
886 msleep(150);
887
888 *class = ATA_DEV_NONE;
81952c54 889 if (ata_port_online(ap)) {
4658f79b
TH		 890 if (ata_busy_sleep(ap, ATA_TMOUT_BOOT_QUICK, ATA_TMOUT_BOOT)) {
891 rc = -EIO;
892 reason = "device not ready";
893 goto fail;
894 }
895 *class = ahci_dev_classify(ap);
896 }
897
898 DPRINTK("EXIT, class=%u\n", *class);
899 return 0;
900
901 fail_restart:
5457f219 902 ahci_start_engine(port_mmio);
4658f79b 903 fail:
f15a1daf 904 ata_port_printk(ap, KERN_ERR, "softreset failed (%s)\n", reason);
4658f79b
TH		 905 return rc;
906}
907
2bf2cb26 908static int ahci_hardreset(struct ata_port *ap, unsigned int *class)
422b7595 909{
4296971d
TH		 910 struct ahci_port_priv *pp = ap->private_data;
911 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
912 struct ata_taskfile tf;
0d5ff566 913 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
5457f219 914 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
4bd00f6a
TH		 915 int rc;
916
917 DPRINTK("ENTER\n");
1da177e4 918
5457f219 919 ahci_stop_engine(port_mmio);
4296971d
TH		 920
921 /* clear D2H reception area to properly wait for D2H FIS */
922 ata_tf_init(ap->device, &tf);
dfd7a3db 923 tf.command = 0x80;
4296971d
TH		 924 ata_tf_to_fis(&tf, d2h_fis, 0);
925
2bf2cb26 926 rc = sata_std_hardreset(ap, class);
4296971d 927
5457f219 928 ahci_start_engine(port_mmio);
1da177e4 929
81952c54 930 if (rc == 0 && ata_port_online(ap))
4bd00f6a
TH		 931 *class = ahci_dev_classify(ap);
932 if (*class == ATA_DEV_UNKNOWN)
933 *class = ATA_DEV_NONE;
1da177e4 934
4bd00f6a
TH		 935 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
936 return rc;
937}
938
ad616ffb
TH		 939static int ahci_vt8251_hardreset(struct ata_port *ap, unsigned int *class)
940{
0d5ff566 941 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
ad616ffb
TH		 942 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
943 int rc;
944
945 DPRINTK("ENTER\n");
946
947 ahci_stop_engine(port_mmio);
948
949 rc = sata_port_hardreset(ap, sata_ehc_deb_timing(&ap->eh_context));
950
951 /* vt8251 needs SError cleared for the port to operate */
952 ahci_scr_write(ap, SCR_ERROR, ahci_scr_read(ap, SCR_ERROR));
953
954 ahci_start_engine(port_mmio);
955
956 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
957
958 /* vt8251 doesn't clear BSY on signature FIS reception,
959 * request follow-up softreset.
960 */
961 return rc ?: -EAGAIN;
962}
963
4bd00f6a
TH		 964static void ahci_postreset(struct ata_port *ap, unsigned int *class)
965{
0d5ff566 966 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
4bd00f6a
TH		 967 u32 new_tmp, tmp;
968
969 ata_std_postreset(ap, class);
02eaa666
JG		 970
971 /* Make sure port's ATAPI bit is set appropriately */
972 new_tmp = tmp = readl(port_mmio + PORT_CMD);
4bd00f6a 973 if (*class == ATA_DEV_ATAPI)
02eaa666
JG		 974 new_tmp |= PORT_CMD_ATAPI;
975 else
976 new_tmp &= ~PORT_CMD_ATAPI;
977 if (new_tmp != tmp) {
978 writel(new_tmp, port_mmio + PORT_CMD);
979 readl(port_mmio + PORT_CMD); /* flush */
980 }
1da177e4
LT		 981}
982
983static u8 ahci_check_status(struct ata_port *ap)
984{
0d5ff566 985 void __iomem *mmio = ap->ioaddr.cmd_addr;
1da177e4
LT		 986
987 return readl(mmio + PORT_TFDATA) & 0xFF;
988}
989
1da177e4
LT		 990static void ahci_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
991{
992 struct ahci_port_priv *pp = ap->private_data;
993 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
994
995 ata_tf_from_fis(d2h_fis, tf);
996}
997
12fad3f9 998static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1da177e4 999{
cedc9a47
JG		 1000 struct scatterlist *sg;
1001 struct ahci_sg *ahci_sg;
828d09de 1002 unsigned int n_sg = 0;
1da177e4
LT		 1003
1004 VPRINTK("ENTER\n");
1005
1006 /*
1007 * Next, the S/G list.
1008 */
12fad3f9 1009 ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
cedc9a47
JG		 1010 ata_for_each_sg(sg, qc) {
1011 dma_addr_t addr = sg_dma_address(sg);
1012 u32 sg_len = sg_dma_len(sg);
1013
1014 ahci_sg->addr = cpu_to_le32(addr & 0xffffffff);
1015 ahci_sg->addr_hi = cpu_to_le32((addr >> 16) >> 16);
1016 ahci_sg->flags_size = cpu_to_le32(sg_len - 1);
828d09de 1017
cedc9a47 1018 ahci_sg++;
828d09de 1019 n_sg++;
1da177e4 1020 }
828d09de
JG		 1021
1022 return n_sg;
1da177e4
LT		 1023}
1024
1025static void ahci_qc_prep(struct ata_queued_cmd *qc)
1026{
a0ea7328
JG		 1027 struct ata_port *ap = qc->ap;
1028 struct ahci_port_priv *pp = ap->private_data;
cc9278ed 1029 int is_atapi = is_atapi_taskfile(&qc->tf);
12fad3f9 1030 void *cmd_tbl;
1da177e4
LT		 1031 u32 opts;
1032 const u32 cmd_fis_len = 5; /* five dwords */
828d09de 1033 unsigned int n_elem;
1da177e4 1034
1da177e4
LT		 1035 /*
1036 * Fill in command table information. First, the header,
1037 * a SATA Register - Host to Device command FIS.
1038 */
12fad3f9
TH		 1039 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1040
1041 ata_tf_to_fis(&qc->tf, cmd_tbl, 0);
cc9278ed 1042 if (is_atapi) {
12fad3f9
TH		 1043 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1044 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
a0ea7328 1045 }
1da177e4 1046
cc9278ed
TH		 1047 n_elem = 0;
1048 if (qc->flags & ATA_QCFLAG_DMAMAP)
12fad3f9 1049 n_elem = ahci_fill_sg(qc, cmd_tbl);
1da177e4 1050
cc9278ed
TH		 1051 /*
1052 * Fill in command slot information.
1053 */
1054 opts = cmd_fis_len | n_elem << 16;
1055 if (qc->tf.flags & ATA_TFLAG_WRITE)
1056 opts |= AHCI_CMD_WRITE;
1057 if (is_atapi)
4b10e559 1058 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
828d09de 1059
12fad3f9 1060 ahci_fill_cmd_slot(pp, qc->tag, opts);
1da177e4
LT		 1061}
1062
78cd52d0 1063static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1da177e4 1064{
78cd52d0
TH		 1065 struct ahci_port_priv *pp = ap->private_data;
1066 struct ata_eh_info *ehi = &ap->eh_info;
1067 unsigned int err_mask = 0, action = 0;
1068 struct ata_queued_cmd *qc;
1069 u32 serror;
1da177e4 1070
78cd52d0 1071 ata_ehi_clear_desc(ehi);
1da177e4 1072
78cd52d0
TH		 1073 /* AHCI needs SError cleared; otherwise, it might lock up */
1074 serror = ahci_scr_read(ap, SCR_ERROR);
1075 ahci_scr_write(ap, SCR_ERROR, serror);
1da177e4 1076
78cd52d0
TH		 1077 /* analyze @irq_stat */
1078 ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
1079
41669553
TH		 1080 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1081 if (ap->flags & AHCI_FLAG_IGN_IRQ_IF_ERR)
1082 irq_stat &= ~PORT_IRQ_IF_ERR;
1083
55a61604 1084 if (irq_stat & PORT_IRQ_TF_ERR) {
78cd52d0 1085 err_mask |= AC_ERR_DEV;
55a61604
CH		 1086 if (ap->flags & AHCI_FLAG_IGN_SERR_INTERNAL)
1087 serror &= ~SERR_INTERNAL;
1088 }
78cd52d0
TH		 1089
1090 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1091 err_mask |= AC_ERR_HOST_BUS;
1092 action |= ATA_EH_SOFTRESET;
1da177e4
LT		 1093 }
1094
78cd52d0
TH		 1095 if (irq_stat & PORT_IRQ_IF_ERR) {
1096 err_mask |= AC_ERR_ATA_BUS;
1097 action |= ATA_EH_SOFTRESET;
1098 ata_ehi_push_desc(ehi, ", interface fatal error");
1099 }
1da177e4 1100
78cd52d0 1101 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
4296971d 1102 ata_ehi_hotplugged(ehi);
78cd52d0
TH		 1103 ata_ehi_push_desc(ehi, ", %s", irq_stat & PORT_IRQ_CONNECT ?
1104 "connection status changed" : "PHY RDY changed");
1105 }
1106
1107 if (irq_stat & PORT_IRQ_UNK_FIS) {
1108 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1da177e4 1109
78cd52d0
TH		 1110 err_mask |= AC_ERR_HSM;
1111 action |= ATA_EH_SOFTRESET;
1112 ata_ehi_push_desc(ehi, ", unknown FIS %08x %08x %08x %08x",
1113 unk[0], unk[1], unk[2], unk[3]);
1114 }
1da177e4 1115
78cd52d0
TH		 1116 /* okay, let's hand over to EH */
1117 ehi->serror |= serror;
1118 ehi->action |= action;
b8f6153e 1119
1da177e4 1120 qc = ata_qc_from_tag(ap, ap->active_tag);
78cd52d0
TH		 1121 if (qc)
1122 qc->err_mask |= err_mask;
1123 else
1124 ehi->err_mask |= err_mask;
a72ec4ce 1125
78cd52d0
TH		 1126 if (irq_stat & PORT_IRQ_FREEZE)
1127 ata_port_freeze(ap);
1128 else
1129 ata_port_abort(ap);
1da177e4
LT		 1130}
1131
78cd52d0 1132static void ahci_host_intr(struct ata_port *ap)
1da177e4 1133{
0d5ff566 1134 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
ea6ba10b 1135 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
12fad3f9 1136 struct ata_eh_info *ehi = &ap->eh_info;
0291f95f 1137 struct ahci_port_priv *pp = ap->private_data;
12fad3f9 1138 u32 status, qc_active;
0291f95f 1139 int rc, known_irq = 0;
1da177e4
LT		 1140
1141 status = readl(port_mmio + PORT_IRQ_STAT);
1142 writel(status, port_mmio + PORT_IRQ_STAT);
1143
78cd52d0
TH		 1144 if (unlikely(status & PORT_IRQ_ERROR)) {
1145 ahci_error_intr(ap, status);
1146 return;
1da177e4
LT		 1147 }
1148
12fad3f9
TH		 1149 if (ap->sactive)
1150 qc_active = readl(port_mmio + PORT_SCR_ACT);
1151 else
1152 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1153
1154 rc = ata_qc_complete_multiple(ap, qc_active, NULL);
1155 if (rc > 0)
1156 return;
1157 if (rc < 0) {
1158 ehi->err_mask |= AC_ERR_HSM;
1159 ehi->action |= ATA_EH_SOFTRESET;
1160 ata_port_freeze(ap);
1161 return;
1da177e4
LT		 1162 }
1163
2a3917a8
TH		 1164 /* hmmm... a spurious interupt */
1165
0291f95f
TH		 1166 /* if !NCQ, ignore. No modern ATA device has broken HSM
1167 * implementation for non-NCQ commands.
1168 */
1169 if (!ap->sactive)
12fad3f9
TH		 1170 return;
1171
0291f95f
TH		 1172 if (status & PORT_IRQ_D2H_REG_FIS) {
1173 if (!pp->ncq_saw_d2h)
1174 ata_port_printk(ap, KERN_INFO,
1175 "D2H reg with I during NCQ, "
1176 "this message won't be printed again\n");
1177 pp->ncq_saw_d2h = 1;
1178 known_irq = 1;
1179 }
1180
1181 if (status & PORT_IRQ_DMAS_FIS) {
1182 if (!pp->ncq_saw_dmas)
1183 ata_port_printk(ap, KERN_INFO,
1184 "DMAS FIS during NCQ, "
1185 "this message won't be printed again\n");
1186 pp->ncq_saw_dmas = 1;
1187 known_irq = 1;
1188 }
1189
a2bbd0c9 1190 if (status & PORT_IRQ_SDB_FIS) {
04d4f7a1 1191 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
0291f95f 1192
afb2d552
TH		 1193 if (le32_to_cpu(f[1])) {
1194 /* SDB FIS containing spurious completions
1195 * might be dangerous, whine and fail commands
1196 * with HSM violation. EH will turn off NCQ
1197 * after several such failures.
1198 */
1199 ata_ehi_push_desc(ehi,
1200 "spurious completions during NCQ "
1201 "issue=0x%x SAct=0x%x FIS=%08x:%08x",
1202 readl(port_mmio + PORT_CMD_ISSUE),
1203 readl(port_mmio + PORT_SCR_ACT),
1204 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1205 ehi->err_mask |= AC_ERR_HSM;
1206 ehi->action |= ATA_EH_SOFTRESET;
1207 ata_port_freeze(ap);
1208 } else {
1209 if (!pp->ncq_saw_sdb)
1210 ata_port_printk(ap, KERN_INFO,
1211 "spurious SDB FIS %08x:%08x during NCQ, "
1212 "this message won't be printed again\n",
1213 le32_to_cpu(f[0]), le32_to_cpu(f[1]));
1214 pp->ncq_saw_sdb = 1;
1215 }
0291f95f
TH		 1216 known_irq = 1;
1217 }
2a3917a8 1218
0291f95f 1219 if (!known_irq)
78cd52d0 1220 ata_port_printk(ap, KERN_INFO, "spurious interrupt "
0291f95f 1221 "(irq_stat 0x%x active_tag 0x%x sactive 0x%x)\n",
12fad3f9 1222 status, ap->active_tag, ap->sactive);
1da177e4
LT		 1223}
1224
1225static void ahci_irq_clear(struct ata_port *ap)
1226{
1227 /* TODO */
1228}
1229
7d12e780 1230static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1da177e4 1231{
cca3974e 1232 struct ata_host *host = dev_instance;
1da177e4
LT		 1233 struct ahci_host_priv *hpriv;
1234 unsigned int i, handled = 0;
ea6ba10b 1235 void __iomem *mmio;
1da177e4
LT		 1236 u32 irq_stat, irq_ack = 0;
1237
1238 VPRINTK("ENTER\n");
1239
cca3974e 1240 hpriv = host->private_data;
0d5ff566 1241 mmio = host->iomap[AHCI_PCI_BAR];
1da177e4
LT		 1242
1243 /* sigh. 0xffffffff is a valid return from h/w */
1244 irq_stat = readl(mmio + HOST_IRQ_STAT);
1245 irq_stat &= hpriv->port_map;
1246 if (!irq_stat)
1247 return IRQ_NONE;
1248
cca3974e 1249 spin_lock(&host->lock);
1da177e4 1250
cca3974e 1251 for (i = 0; i < host->n_ports; i++) {
1da177e4 1252 struct ata_port *ap;
1da177e4 1253
67846b30
JG		 1254 if (!(irq_stat & (1 << i)))
1255 continue;
1256
cca3974e 1257 ap = host->ports[i];
67846b30 1258 if (ap) {
78cd52d0 1259 ahci_host_intr(ap);
67846b30
JG		 1260 VPRINTK("port %u\n", i);
1261 } else {
1262 VPRINTK("port %u (no irq)\n", i);
6971ed1f 1263 if (ata_ratelimit())
cca3974e 1264 dev_printk(KERN_WARNING, host->dev,
a9524a76 1265 "interrupt on disabled port %u\n", i);
1da177e4 1266 }
67846b30
JG		 1267
1268 irq_ack |= (1 << i);
1da177e4
LT		 1269 }
1270
1271 if (irq_ack) {
1272 writel(irq_ack, mmio + HOST_IRQ_STAT);
1273 handled = 1;
1274 }
1275
cca3974e 1276 spin_unlock(&host->lock);
1da177e4
LT		 1277
1278 VPRINTK("EXIT\n");
1279
1280 return IRQ_RETVAL(handled);
1281}
1282
9a3d9eb0 1283static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1da177e4
LT		 1284{
1285 struct ata_port *ap = qc->ap;
0d5ff566 1286 void __iomem *port_mmio = ap->ioaddr.cmd_addr;
1da177e4 1287
12fad3f9
TH		 1288 if (qc->tf.protocol == ATA_PROT_NCQ)
1289 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1290 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1da177e4
LT		 1291 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1292
1293 return 0;
1294}
1295
78cd52d0
TH		 1296static void ahci_freeze(struct ata_port *ap)
1297{
0d5ff566 1298 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
78cd52d0
TH		 1299 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1300
1301 /* turn IRQ off */
1302 writel(0, port_mmio + PORT_IRQ_MASK);
1303}
1304
1305static void ahci_thaw(struct ata_port *ap)
1306{
0d5ff566 1307 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
78cd52d0
TH		 1308 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1309 u32 tmp;
1310
1311 /* clear IRQ */
1312 tmp = readl(port_mmio + PORT_IRQ_STAT);
1313 writel(tmp, port_mmio + PORT_IRQ_STAT);
a718728f 1314 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
78cd52d0
TH		 1315
1316 /* turn IRQ back on */
1317 writel(DEF_PORT_IRQ, port_mmio + PORT_IRQ_MASK);
1318}
1319
1320static void ahci_error_handler(struct ata_port *ap)
1321{
0d5ff566 1322 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
5457f219 1323 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1324
b51e9e5d 1325 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
78cd52d0 1326 /* restart engine */
5457f219 1327 ahci_stop_engine(port_mmio);
1328 ahci_start_engine(port_mmio);
78cd52d0
TH		 1329 }
1330
1331 /* perform recovery */
4aeb0e32 1332 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_hardreset,
f5914a46 1333 ahci_postreset);
78cd52d0
TH		 1334}
1335
ad616ffb
TH		 1336static void ahci_vt8251_error_handler(struct ata_port *ap)
1337{
0d5ff566 1338 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
ad616ffb
TH		 1339 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1340
1341 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1342 /* restart engine */
1343 ahci_stop_engine(port_mmio);
1344 ahci_start_engine(port_mmio);
1345 }
1346
1347 /* perform recovery */
1348 ata_do_eh(ap, ata_std_prereset, ahci_softreset, ahci_vt8251_hardreset,
1349 ahci_postreset);
1350}
1351
78cd52d0
TH		 1352static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1353{
1354 struct ata_port *ap = qc->ap;
0d5ff566 1355 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
5457f219 1356 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
78cd52d0
TH		 1357
1358 if (qc->flags & ATA_QCFLAG_FAILED)
1359 qc->err_mask |= AC_ERR_OTHER;
1360
1361 if (qc->err_mask) {
1362 /* make DMA engine forget about the failed command */
5457f219 1363 ahci_stop_engine(port_mmio);
1364 ahci_start_engine(port_mmio);
78cd52d0
TH		 1365 }
1366}
1367
438ac6d5 1368#ifdef CONFIG_PM
c1332875
TH		 1369static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1370{
cca3974e 1371 struct ahci_host_priv *hpriv = ap->host->private_data;
c1332875 1372 struct ahci_port_priv *pp = ap->private_data;
0d5ff566 1373 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
c1332875
TH		 1374 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1375 const char *emsg = NULL;
1376 int rc;
1377
1378 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
8e16f941
TH		 1379 if (rc == 0)
1380 ahci_power_down(port_mmio, hpriv->cap);
1381 else {
c1332875
TH		 1382 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1383 ahci_init_port(port_mmio, hpriv->cap,
1384 pp->cmd_slot_dma, pp->rx_fis_dma);
1385 }
1386
1387 return rc;
1388}
1389
1390static int ahci_port_resume(struct ata_port *ap)
1391{
1392 struct ahci_port_priv *pp = ap->private_data;
cca3974e 1393 struct ahci_host_priv *hpriv = ap->host->private_data;
0d5ff566 1394 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
c1332875
TH		 1395 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1396
8e16f941 1397 ahci_power_up(port_mmio, hpriv->cap);
c1332875
TH		 1398 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
1399
1400 return 0;
1401}
1402
1403static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1404{
cca3974e 1405 struct ata_host *host = dev_get_drvdata(&pdev->dev);
0d5ff566 1406 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
c1332875
TH		 1407 u32 ctl;
1408
1409 if (mesg.event == PM_EVENT_SUSPEND) {
1410 /* AHCI spec rev1.1 section 8.3.3:
1411 * Software must disable interrupts prior to requesting a
1412 * transition of the HBA to D3 state.
1413 */
1414 ctl = readl(mmio + HOST_CTL);
1415 ctl &= ~HOST_IRQ_EN;
1416 writel(ctl, mmio + HOST_CTL);
1417 readl(mmio + HOST_CTL); /* flush */
1418 }
1419
1420 return ata_pci_device_suspend(pdev, mesg);
1421}
1422
1423static int ahci_pci_device_resume(struct pci_dev *pdev)
1424{
cca3974e
JG		 1425 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1426 struct ahci_host_priv *hpriv = host->private_data;
0d5ff566 1427 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
c1332875
TH		 1428 int rc;
1429
553c4aa6
TH		 1430 rc = ata_pci_device_do_resume(pdev);
1431 if (rc)
1432 return rc;
c1332875
TH		 1433
1434 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1435 rc = ahci_reset_controller(mmio, pdev);
1436 if (rc)
1437 return rc;
1438
648a88be
TH		 1439 ahci_init_controller(mmio, pdev, host->n_ports,
1440 host->ports[0]->flags, hpriv);
c1332875
TH		 1441 }
1442
cca3974e 1443 ata_host_resume(host);
c1332875
TH		 1444
1445 return 0;
1446}
438ac6d5 1447#endif
c1332875 1448
254950cd
TH		 1449static int ahci_port_start(struct ata_port *ap)
1450{
cca3974e
JG		 1451 struct device *dev = ap->host->dev;
1452 struct ahci_host_priv *hpriv = ap->host->private_data;
254950cd 1453 struct ahci_port_priv *pp;
0d5ff566 1454 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
254950cd
TH		 1455 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
1456 void *mem;
1457 dma_addr_t mem_dma;
1458 int rc;
1459
24dc5f33 1460 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
254950cd
TH		 1461 if (!pp)
1462 return -ENOMEM;
254950cd
TH		 1463
1464 rc = ata_pad_alloc(ap, dev);
24dc5f33 1465 if (rc)
254950cd 1466 return rc;
254950cd 1467
24dc5f33
TH		 1468 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1469 GFP_KERNEL);
1470 if (!mem)
254950cd 1471 return -ENOMEM;
254950cd
TH		 1472 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1473
1474 /*
1475 * First item in chunk of DMA memory: 32-slot command table,
1476 * 32 bytes each in size
1477 */
1478 pp->cmd_slot = mem;
1479 pp->cmd_slot_dma = mem_dma;
1480
1481 mem += AHCI_CMD_SLOT_SZ;
1482 mem_dma += AHCI_CMD_SLOT_SZ;
1483
1484 /*
1485 * Second item: Received-FIS area
1486 */
1487 pp->rx_fis = mem;
1488 pp->rx_fis_dma = mem_dma;
1489
1490 mem += AHCI_RX_FIS_SZ;
1491 mem_dma += AHCI_RX_FIS_SZ;
1492
1493 /*
1494 * Third item: data area for storing a single command
1495 * and its scatter-gather table
1496 */
1497 pp->cmd_tbl = mem;
1498 pp->cmd_tbl_dma = mem_dma;
1499
1500 ap->private_data = pp;
1501
8e16f941
TH		 1502 /* power up port */
1503 ahci_power_up(port_mmio, hpriv->cap);
1504
0be0aa98
TH		 1505 /* initialize port */
1506 ahci_init_port(port_mmio, hpriv->cap, pp->cmd_slot_dma, pp->rx_fis_dma);
254950cd
TH		 1507
1508 return 0;
1509}
1510
1511static void ahci_port_stop(struct ata_port *ap)
1512{
cca3974e 1513 struct ahci_host_priv *hpriv = ap->host->private_data;
0d5ff566 1514 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
254950cd 1515 void __iomem *port_mmio = ahci_port_base(mmio, ap->port_no);
0be0aa98
TH		 1516 const char *emsg = NULL;
1517 int rc;
254950cd 1518
0be0aa98
TH		 1519 /* de-initialize port */
1520 rc = ahci_deinit_port(port_mmio, hpriv->cap, &emsg);
1521 if (rc)
1522 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
254950cd
TH		 1523}
1524
0d5ff566 1525static void ahci_setup_port(struct ata_ioports *port, void __iomem *base,
1da177e4
LT		 1526 unsigned int port_idx)
1527{
1528 VPRINTK("ENTER, base==0x%lx, port_idx %u\n", base, port_idx);
0d5ff566 1529 base = ahci_port_base(base, port_idx);
1da177e4
LT		 1530 VPRINTK("base now==0x%lx\n", base);
1531
1532 port->cmd_addr = base;
1533 port->scr_addr = base + PORT_SCR;
1534
1535 VPRINTK("EXIT\n");
1536}
1537
1538static int ahci_host_init(struct ata_probe_ent *probe_ent)
1539{
1540 struct ahci_host_priv *hpriv = probe_ent->private_data;
1541 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
0d5ff566 1542 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
648a88be 1543 unsigned int i, cap_n_ports, using_dac;
1da177e4 1544 int rc;
1da177e4 1545
d91542c1
TH		 1546 rc = ahci_reset_controller(mmio, pdev);
1547 if (rc)
1548 return rc;
1da177e4
LT		 1549
1550 hpriv->cap = readl(mmio + HOST_CAP);
1551 hpriv->port_map = readl(mmio + HOST_PORTS_IMPL);
648a88be 1552 cap_n_ports = ahci_nr_ports(hpriv->cap);
1da177e4
LT		 1553
1554 VPRINTK("cap 0x%x port_map 0x%x n_ports %d\n",
648a88be
TH		 1555 hpriv->cap, hpriv->port_map, cap_n_ports);
1556
1557 if (probe_ent->port_flags & AHCI_FLAG_HONOR_PI) {
1558 unsigned int n_ports = cap_n_ports;
1559 u32 port_map = hpriv->port_map;
1560 int max_port = 0;
1561
1562 for (i = 0; i < AHCI_MAX_PORTS && n_ports; i++) {
1563 if (port_map & (1 << i)) {
1564 n_ports--;
1565 port_map &= ~(1 << i);
1566 max_port = i;
1567 } else
1568 probe_ent->dummy_port_mask |= 1 << i;
1569 }
1570
1571 if (n_ports || port_map)
1572 dev_printk(KERN_WARNING, &pdev->dev,
1573 "nr_ports (%u) and implemented port map "
1574 "(0x%x) don't match\n",
1575 cap_n_ports, hpriv->port_map);
1576
1577 probe_ent->n_ports = max_port + 1;
1578 } else
1579 probe_ent->n_ports = cap_n_ports;
1da177e4
LT		 1580
1581 using_dac = hpriv->cap & HOST_CAP_64;
1582 if (using_dac &&
1583 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1584 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1585 if (rc) {
1586 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1587 if (rc) {
a9524a76
JG		 1588 dev_printk(KERN_ERR, &pdev->dev,
1589 "64-bit DMA enable failed\n");
1da177e4
LT		 1590 return rc;
1591 }
1592 }
1da177e4
LT		 1593 } else {
1594 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1595 if (rc) {
a9524a76
JG		 1596 dev_printk(KERN_ERR, &pdev->dev,
1597 "32-bit DMA enable failed\n");
1da177e4
LT		 1598 return rc;
1599 }
1600 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1601 if (rc) {
a9524a76
JG		 1602 dev_printk(KERN_ERR, &pdev->dev,
1603 "32-bit consistent DMA enable failed\n");
1da177e4
LT		 1604 return rc;
1605 }
1606 }
1607
d91542c1 1608 for (i = 0; i < probe_ent->n_ports; i++)
0d5ff566 1609 ahci_setup_port(&probe_ent->port[i], mmio, i);
1da177e4 1610
648a88be
TH		 1611 ahci_init_controller(mmio, pdev, probe_ent->n_ports,
1612 probe_ent->port_flags, hpriv);
1da177e4
LT		 1613
1614 pci_set_master(pdev);
1615
1616 return 0;
1617}
1618
1da177e4
LT		 1619static void ahci_print_info(struct ata_probe_ent *probe_ent)
1620{
1621 struct ahci_host_priv *hpriv = probe_ent->private_data;
1622 struct pci_dev *pdev = to_pci_dev(probe_ent->dev);
0d5ff566 1623 void __iomem *mmio = probe_ent->iomap[AHCI_PCI_BAR];
1da177e4
LT		 1624 u32 vers, cap, impl, speed;
1625 const char *speed_s;
1626 u16 cc;
1627 const char *scc_s;
1628
1629 vers = readl(mmio + HOST_VERSION);
1630 cap = hpriv->cap;
1631 impl = hpriv->port_map;
1632
1633 speed = (cap >> 20) & 0xf;
1634 if (speed == 1)
1635 speed_s = "1.5";
1636 else if (speed == 2)
1637 speed_s = "3";
1638 else
1639 speed_s = "?";
1640
1641 pci_read_config_word(pdev, 0x0a, &cc);
c9f89475 1642 if (cc == PCI_CLASS_STORAGE_IDE)
1da177e4 1643 scc_s = "IDE";
c9f89475 1644 else if (cc == PCI_CLASS_STORAGE_SATA)
1da177e4 1645 scc_s = "SATA";
c9f89475 1646 else if (cc == PCI_CLASS_STORAGE_RAID)
1da177e4
LT		 1647 scc_s = "RAID";
1648 else
1649 scc_s = "unknown";
1650
a9524a76
JG		 1651 dev_printk(KERN_INFO, &pdev->dev,
1652 "AHCI %02x%02x.%02x%02x "
1da177e4
LT		 1653 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
1654 ,
1da177e4
LT		 1655
1656 (vers >> 24) & 0xff,
1657 (vers >> 16) & 0xff,
1658 (vers >> 8) & 0xff,
1659 vers & 0xff,
1660
1661 ((cap >> 8) & 0x1f) + 1,
1662 (cap & 0x1f) + 1,
1663 speed_s,
1664 impl,
1665 scc_s);
1666
a9524a76
JG		 1667 dev_printk(KERN_INFO, &pdev->dev,
1668 "flags: "
1da177e4
LT		 1669 "%s%s%s%s%s%s"
1670 "%s%s%s%s%s%s%s\n"
1671 ,
1da177e4
LT		 1672
1673 cap & (1 << 31) ? "64bit " : "",
1674 cap & (1 << 30) ? "ncq " : "",
1675 cap & (1 << 28) ? "ilck " : "",
1676 cap & (1 << 27) ? "stag " : "",
1677 cap & (1 << 26) ? "pm " : "",
1678 cap & (1 << 25) ? "led " : "",
1679
1680 cap & (1 << 24) ? "clo " : "",
1681 cap & (1 << 19) ? "nz " : "",
1682 cap & (1 << 18) ? "only " : "",
1683 cap & (1 << 17) ? "pmp " : "",
1684 cap & (1 << 15) ? "pio " : "",
1685 cap & (1 << 14) ? "slum " : "",
1686 cap & (1 << 13) ? "part " : ""
1687 );
1688}
1689
24dc5f33 1690static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
1da177e4
LT		 1691{
1692 static int printed_version;
24dc5f33
TH		 1693 unsigned int board_idx = (unsigned int) ent->driver_data;
1694 struct device *dev = &pdev->dev;
1695 struct ata_probe_ent *probe_ent;
1da177e4 1696 struct ahci_host_priv *hpriv;
1da177e4
LT		 1697 int rc;
1698
1699 VPRINTK("ENTER\n");
1700
12fad3f9
TH		 1701 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
1702
1da177e4 1703 if (!printed_version++)
a9524a76 1704 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
1da177e4 1705
24dc5f33 1706 rc = pcim_enable_device(pdev);
1da177e4
LT		 1707 if (rc)
1708 return rc;
1709
0d5ff566
TH		 1710 rc = pcim_iomap_regions(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
1711 if (rc == -EBUSY)
24dc5f33 1712 pcim_pin_device(pdev);
0d5ff566 1713 if (rc)
24dc5f33 1714 return rc;
1da177e4 1715
24dc5f33 1716 if (pci_enable_msi(pdev))
907f4678 1717 pci_intx(pdev, 1);
1da177e4 1718
24dc5f33
TH		 1719 probe_ent = devm_kzalloc(dev, sizeof(*probe_ent), GFP_KERNEL);
1720 if (probe_ent == NULL)
1721 return -ENOMEM;
1da177e4 1722
1da177e4
LT		 1723 probe_ent->dev = pci_dev_to_dev(pdev);
1724 INIT_LIST_HEAD(&probe_ent->node);
1725
24dc5f33
TH		 1726 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
1727 if (!hpriv)
1728 return -ENOMEM;
1da177e4
LT		 1729
1730 probe_ent->sht = ahci_port_info[board_idx].sht;
cca3974e 1731 probe_ent->port_flags = ahci_port_info[board_idx].flags;
1da177e4
LT		 1732 probe_ent->pio_mask = ahci_port_info[board_idx].pio_mask;
1733 probe_ent->udma_mask = ahci_port_info[board_idx].udma_mask;
1734 probe_ent->port_ops = ahci_port_info[board_idx].port_ops;
1735
1736 probe_ent->irq = pdev->irq;
1d6f359a 1737 probe_ent->irq_flags = IRQF_SHARED;
0d5ff566 1738 probe_ent->iomap = pcim_iomap_table(pdev);
1da177e4
LT		 1739 probe_ent->private_data = hpriv;
1740
1741 /* initialize adapter */
1742 rc = ahci_host_init(probe_ent);
1743 if (rc)
24dc5f33 1744 return rc;
1da177e4 1745
cca3974e 1746 if (!(probe_ent->port_flags & AHCI_FLAG_NO_NCQ) &&
71f0737b 1747 (hpriv->cap & HOST_CAP_NCQ))
cca3974e 1748 probe_ent->port_flags |= ATA_FLAG_NCQ;
12fad3f9 1749
1da177e4
LT		 1750 ahci_print_info(probe_ent);
1751
24dc5f33
TH		 1752 if (!ata_device_add(probe_ent))
1753 return -ENODEV;
1da177e4 1754
24dc5f33 1755 devm_kfree(dev, probe_ent);
1da177e4 1756 return 0;
907f4678 1757}
1da177e4
LT		 1758
1759static int __init ahci_init(void)
1760{
b7887196 1761 return pci_register_driver(&ahci_pci_driver);
1da177e4
LT		 1762}
1763
1da177e4
LT		 1764static void __exit ahci_exit(void)
1765{
1766 pci_unregister_driver(&ahci_pci_driver);
1767}
1768
1769
1770MODULE_AUTHOR("Jeff Garzik");
1771MODULE_DESCRIPTION("AHCI SATA low-level driver");
1772MODULE_LICENSE("GPL");
1773MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
6885433c 1774MODULE_VERSION(DRV_VERSION);
1da177e4
LT		 1775
1776module_init(ahci_init);
1777module_exit(ahci_exit);
Linux 6.x block layer and io_uring tree(s)