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libata: move link onlineness check out of softreset methods
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / ata / ahci.c
blob739ba3f222e851407cd97dcc2ed52ac509e32edc
1 /*
2 * ahci.c - AHCI SATA support
3 *
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:
30 * http://www.intel.com/technology/serialata/pdf/rev1_0.pdf
31 * http://www.intel.com/technology/serialata/pdf/rev1_1.pdf
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>
42 #include <linux/dma-mapping.h>
43 #include <linux/device.h>
44 #include <linux/dmi.h>
45 #include <scsi/scsi_host.h>
46 #include <scsi/scsi_cmnd.h>
47 #include <linux/libata.h>
48
49 #define DRV_NAME "ahci"
50 #define DRV_VERSION "3.0"
51
52 static int ahci_skip_host_reset;
53 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444);
54 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)");
55
56 static int ahci_enable_alpm(struct ata_port *ap,
57 enum link_pm policy);
58 static void ahci_disable_alpm(struct ata_port *ap);
59
60 enum {
61 AHCI_PCI_BAR = 5,
62 AHCI_MAX_PORTS = 32,
63 AHCI_MAX_SG = 168, /* hardware max is 64K */
64 AHCI_DMA_BOUNDARY = 0xffffffff,
65 AHCI_MAX_CMDS = 32,
66 AHCI_CMD_SZ = 32,
67 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
68 AHCI_RX_FIS_SZ = 256,
69 AHCI_CMD_TBL_CDB = 0x40,
70 AHCI_CMD_TBL_HDR_SZ = 0x80,
71 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
72 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
73 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
74 AHCI_RX_FIS_SZ,
75 AHCI_IRQ_ON_SG = (1 << 31),
76 AHCI_CMD_ATAPI = (1 << 5),
77 AHCI_CMD_WRITE = (1 << 6),
78 AHCI_CMD_PREFETCH = (1 << 7),
79 AHCI_CMD_RESET = (1 << 8),
80 AHCI_CMD_CLR_BUSY = (1 << 10),
81
82 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
83 RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
84 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
85
86 board_ahci = 0,
87 board_ahci_vt8251 = 1,
88 board_ahci_ign_iferr = 2,
89 board_ahci_sb600 = 3,
90 board_ahci_mv = 4,
91 board_ahci_sb700 = 5,
92
93 /* global controller registers */
94 HOST_CAP = 0x00, /* host capabilities */
95 HOST_CTL = 0x04, /* global host control */
96 HOST_IRQ_STAT = 0x08, /* interrupt status */
97 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
98 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
99
100 /* HOST_CTL bits */
101 HOST_RESET = (1 << 0), /* reset controller; self-clear */
102 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
103 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
104
105 /* HOST_CAP bits */
106 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
107 HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
108 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
109 HOST_CAP_ALPM = (1 << 26), /* Aggressive Link PM support */
110 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
111 HOST_CAP_SNTF = (1 << 29), /* SNotification register */
112 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
113 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
114
115 /* registers for each SATA port */
116 PORT_LST_ADDR = 0x00, /* command list DMA addr */
117 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
118 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
119 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
120 PORT_IRQ_STAT = 0x10, /* interrupt status */
121 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
122 PORT_CMD = 0x18, /* port command */
123 PORT_TFDATA = 0x20, /* taskfile data */
124 PORT_SIG = 0x24, /* device TF signature */
125 PORT_CMD_ISSUE = 0x38, /* command issue */
126 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
127 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
128 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
129 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
130 PORT_SCR_NTF = 0x3c, /* SATA phy register: SNotification */
131
132 /* PORT_IRQ_{STAT,MASK} bits */
133 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
134 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
135 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
136 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
137 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
138 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
139 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
140 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
141
142 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
143 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
144 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
145 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
146 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
147 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
148 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
149 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
150 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
151
152 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
153 PORT_IRQ_IF_ERR |
154 PORT_IRQ_CONNECT |
155 PORT_IRQ_PHYRDY |
156 PORT_IRQ_UNK_FIS |
157 PORT_IRQ_BAD_PMP,
158 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
159 PORT_IRQ_TF_ERR |
160 PORT_IRQ_HBUS_DATA_ERR,
161 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
162 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
163 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
164
165 /* PORT_CMD bits */
166 PORT_CMD_ASP = (1 << 27), /* Aggressive Slumber/Partial */
167 PORT_CMD_ALPE = (1 << 26), /* Aggressive Link PM enable */
168 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
169 PORT_CMD_PMP = (1 << 17), /* PMP attached */
170 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
171 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
172 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
173 PORT_CMD_CLO = (1 << 3), /* Command list override */
174 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
175 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
176 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
177
178 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
179 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
180 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
181 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
182
183 /* hpriv->flags bits */
184 AHCI_HFLAG_NO_NCQ = (1 << 0),
185 AHCI_HFLAG_IGN_IRQ_IF_ERR = (1 << 1), /* ignore IRQ_IF_ERR */
186 AHCI_HFLAG_IGN_SERR_INTERNAL = (1 << 2), /* ignore SERR_INTERNAL */
187 AHCI_HFLAG_32BIT_ONLY = (1 << 3), /* force 32bit */
188 AHCI_HFLAG_MV_PATA = (1 << 4), /* PATA port */
189 AHCI_HFLAG_NO_MSI = (1 << 5), /* no PCI MSI */
190 AHCI_HFLAG_NO_PMP = (1 << 6), /* no PMP */
191 AHCI_HFLAG_NO_HOTPLUG = (1 << 7), /* ignore PxSERR.DIAG.N */
192 AHCI_HFLAG_SECT255 = (1 << 8), /* max 255 sectors */
193
194 /* ap->flags bits */
195
196 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
197 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
198 ATA_FLAG_ACPI_SATA | ATA_FLAG_AN |
199 ATA_FLAG_IPM,
200
201 ICH_MAP = 0x90, /* ICH MAP register */
202 };
203
204 struct ahci_cmd_hdr {
205 __le32 opts;
206 __le32 status;
207 __le32 tbl_addr;
208 __le32 tbl_addr_hi;
209 __le32 reserved[4];
210 };
211
212 struct ahci_sg {
213 __le32 addr;
214 __le32 addr_hi;
215 __le32 reserved;
216 __le32 flags_size;
217 };
218
219 struct ahci_host_priv {
220 unsigned int flags; /* AHCI_HFLAG_* */
221 u32 cap; /* cap to use */
222 u32 port_map; /* port map to use */
223 u32 saved_cap; /* saved initial cap */
224 u32 saved_port_map; /* saved initial port_map */
225 };
226
227 struct ahci_port_priv {
228 struct ata_link *active_link;
229 struct ahci_cmd_hdr *cmd_slot;
230 dma_addr_t cmd_slot_dma;
231 void *cmd_tbl;
232 dma_addr_t cmd_tbl_dma;
233 void *rx_fis;
234 dma_addr_t rx_fis_dma;
235 /* for NCQ spurious interrupt analysis */
236 unsigned int ncq_saw_d2h:1;
237 unsigned int ncq_saw_dmas:1;
238 unsigned int ncq_saw_sdb:1;
239 u32 intr_mask; /* interrupts to enable */
240 };
241
242 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
243 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val);
244 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
245 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
246 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
247 static int ahci_port_start(struct ata_port *ap);
248 static void ahci_port_stop(struct ata_port *ap);
249 static void ahci_qc_prep(struct ata_queued_cmd *qc);
250 static void ahci_freeze(struct ata_port *ap);
251 static void ahci_thaw(struct ata_port *ap);
252 static void ahci_pmp_attach(struct ata_port *ap);
253 static void ahci_pmp_detach(struct ata_port *ap);
254 static int ahci_softreset(struct ata_link *link, unsigned int *class,
255 unsigned long deadline);
256 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
257 unsigned long deadline);
258 static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
259 unsigned long deadline);
260 static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
261 unsigned long deadline);
262 static void ahci_postreset(struct ata_link *link, unsigned int *class);
263 static void ahci_error_handler(struct ata_port *ap);
264 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
265 static int ahci_port_resume(struct ata_port *ap);
266 static void ahci_dev_config(struct ata_device *dev);
267 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl);
268 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
269 u32 opts);
270 #ifdef CONFIG_PM
271 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
272 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
273 static int ahci_pci_device_resume(struct pci_dev *pdev);
274 #endif
275
276 static struct class_device_attribute *ahci_shost_attrs[] = {
277 &class_device_attr_link_power_management_policy,
278 NULL
279 };
280
281 static struct scsi_host_template ahci_sht = {
282 ATA_NCQ_SHT(DRV_NAME),
283 .can_queue = AHCI_MAX_CMDS - 1,
284 .sg_tablesize = AHCI_MAX_SG,
285 .dma_boundary = AHCI_DMA_BOUNDARY,
286 .shost_attrs = ahci_shost_attrs,
287 };
288
289 static struct ata_port_operations ahci_ops = {
290 .inherits = &sata_pmp_port_ops,
291
292 .qc_defer = sata_pmp_qc_defer_cmd_switch,
293 .qc_prep = ahci_qc_prep,
294 .qc_issue = ahci_qc_issue,
295 .qc_fill_rtf = ahci_qc_fill_rtf,
296
297 .freeze = ahci_freeze,
298 .thaw = ahci_thaw,
299 .softreset = ahci_softreset,
300 .hardreset = ahci_hardreset,
301 .postreset = ahci_postreset,
302 .pmp_softreset = ahci_softreset,
303 .error_handler = ahci_error_handler,
304 .post_internal_cmd = ahci_post_internal_cmd,
305 .dev_config = ahci_dev_config,
306
307 .scr_read = ahci_scr_read,
308 .scr_write = ahci_scr_write,
309 .pmp_attach = ahci_pmp_attach,
310 .pmp_detach = ahci_pmp_detach,
311
312 .enable_pm = ahci_enable_alpm,
313 .disable_pm = ahci_disable_alpm,
314 #ifdef CONFIG_PM
315 .port_suspend = ahci_port_suspend,
316 .port_resume = ahci_port_resume,
317 #endif
318 .port_start = ahci_port_start,
319 .port_stop = ahci_port_stop,
320 };
321
322 static struct ata_port_operations ahci_vt8251_ops = {
323 .inherits = &ahci_ops,
324 .hardreset = ahci_vt8251_hardreset,
325 };
326
327 static struct ata_port_operations ahci_p5wdh_ops = {
328 .inherits = &ahci_ops,
329 .hardreset = ahci_p5wdh_hardreset,
330 };
331
332 #define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
333
334 static const struct ata_port_info ahci_port_info[] = {
335 /* board_ahci */
336 {
337 .flags = AHCI_FLAG_COMMON,
338 .pio_mask = 0x1f, /* pio0-4 */
339 .udma_mask = ATA_UDMA6,
340 .port_ops = &ahci_ops,
341 },
342 /* board_ahci_vt8251 */
343 {
344 AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_PMP),
345 .flags = AHCI_FLAG_COMMON,
346 .pio_mask = 0x1f, /* pio0-4 */
347 .udma_mask = ATA_UDMA6,
348 .port_ops = &ahci_vt8251_ops,
349 },
350 /* board_ahci_ign_iferr */
351 {
352 AHCI_HFLAGS (AHCI_HFLAG_IGN_IRQ_IF_ERR),
353 .flags = AHCI_FLAG_COMMON,
354 .pio_mask = 0x1f, /* pio0-4 */
355 .udma_mask = ATA_UDMA6,
356 .port_ops = &ahci_ops,
357 },
358 /* board_ahci_sb600 */
359 {
360 AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
361 AHCI_HFLAG_32BIT_ONLY |
362 AHCI_HFLAG_SECT255 | AHCI_HFLAG_NO_PMP),
363 .flags = AHCI_FLAG_COMMON,
364 .pio_mask = 0x1f, /* pio0-4 */
365 .udma_mask = ATA_UDMA6,
366 .port_ops = &ahci_ops,
367 },
368 /* board_ahci_mv */
369 {
370 AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_MSI |
371 AHCI_HFLAG_MV_PATA),
372 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
373 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
374 .pio_mask = 0x1f, /* pio0-4 */
375 .udma_mask = ATA_UDMA6,
376 .port_ops = &ahci_ops,
377 },
378 /* board_ahci_sb700 */
379 {
380 AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
381 AHCI_HFLAG_NO_PMP),
382 .flags = AHCI_FLAG_COMMON,
383 .pio_mask = 0x1f, /* pio0-4 */
384 .udma_mask = ATA_UDMA6,
385 .port_ops = &ahci_ops,
386 },
387 };
388
389 static const struct pci_device_id ahci_pci_tbl[] = {
390 /* Intel */
391 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
392 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
393 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
394 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
395 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
396 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
397 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
398 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
399 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
400 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
401 { PCI_VDEVICE(INTEL, 0x2821), board_ahci }, /* ICH8 */
402 { PCI_VDEVICE(INTEL, 0x2822), board_ahci }, /* ICH8 */
403 { PCI_VDEVICE(INTEL, 0x2824), board_ahci }, /* ICH8 */
404 { PCI_VDEVICE(INTEL, 0x2829), board_ahci }, /* ICH8M */
405 { PCI_VDEVICE(INTEL, 0x282a), board_ahci }, /* ICH8M */
406 { PCI_VDEVICE(INTEL, 0x2922), board_ahci }, /* ICH9 */
407 { PCI_VDEVICE(INTEL, 0x2923), board_ahci }, /* ICH9 */
408 { PCI_VDEVICE(INTEL, 0x2924), board_ahci }, /* ICH9 */
409 { PCI_VDEVICE(INTEL, 0x2925), board_ahci }, /* ICH9 */
410 { PCI_VDEVICE(INTEL, 0x2927), board_ahci }, /* ICH9 */
411 { PCI_VDEVICE(INTEL, 0x2929), board_ahci }, /* ICH9M */
412 { PCI_VDEVICE(INTEL, 0x292a), board_ahci }, /* ICH9M */
413 { PCI_VDEVICE(INTEL, 0x292b), board_ahci }, /* ICH9M */
414 { PCI_VDEVICE(INTEL, 0x292c), board_ahci }, /* ICH9M */
415 { PCI_VDEVICE(INTEL, 0x292f), board_ahci }, /* ICH9M */
416 { PCI_VDEVICE(INTEL, 0x294d), board_ahci }, /* ICH9 */
417 { PCI_VDEVICE(INTEL, 0x294e), board_ahci }, /* ICH9M */
418 { PCI_VDEVICE(INTEL, 0x502a), board_ahci }, /* Tolapai */
419 { PCI_VDEVICE(INTEL, 0x502b), board_ahci }, /* Tolapai */
420 { PCI_VDEVICE(INTEL, 0x3a05), board_ahci }, /* ICH10 */
421 { PCI_VDEVICE(INTEL, 0x3a25), board_ahci }, /* ICH10 */
422
423 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
424 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
425 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
426
427 /* ATI */
428 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
429 { PCI_VDEVICE(ATI, 0x4390), board_ahci_sb700 }, /* ATI SB700/800 */
430 { PCI_VDEVICE(ATI, 0x4391), board_ahci_sb700 }, /* ATI SB700/800 */
431 { PCI_VDEVICE(ATI, 0x4392), board_ahci_sb700 }, /* ATI SB700/800 */
432 { PCI_VDEVICE(ATI, 0x4393), board_ahci_sb700 }, /* ATI SB700/800 */
433 { PCI_VDEVICE(ATI, 0x4394), board_ahci_sb700 }, /* ATI SB700/800 */
434 { PCI_VDEVICE(ATI, 0x4395), board_ahci_sb700 }, /* ATI SB700/800 */
435
436 /* VIA */
437 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
438 { PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */
439
440 /* NVIDIA */
441 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci }, /* MCP65 */
442 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci }, /* MCP65 */
443 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci }, /* MCP65 */
444 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci }, /* MCP65 */
445 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci }, /* MCP65 */
446 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci }, /* MCP65 */
447 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci }, /* MCP65 */
448 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci }, /* MCP65 */
449 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
450 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
451 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
452 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
453 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
454 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
455 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
456 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
457 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
458 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
459 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
460 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
461 { PCI_VDEVICE(NVIDIA, 0x07f0), board_ahci }, /* MCP73 */
462 { PCI_VDEVICE(NVIDIA, 0x07f1), board_ahci }, /* MCP73 */
463 { PCI_VDEVICE(NVIDIA, 0x07f2), board_ahci }, /* MCP73 */
464 { PCI_VDEVICE(NVIDIA, 0x07f3), board_ahci }, /* MCP73 */
465 { PCI_VDEVICE(NVIDIA, 0x07f4), board_ahci }, /* MCP73 */
466 { PCI_VDEVICE(NVIDIA, 0x07f5), board_ahci }, /* MCP73 */
467 { PCI_VDEVICE(NVIDIA, 0x07f6), board_ahci }, /* MCP73 */
468 { PCI_VDEVICE(NVIDIA, 0x07f7), board_ahci }, /* MCP73 */
469 { PCI_VDEVICE(NVIDIA, 0x07f8), board_ahci }, /* MCP73 */
470 { PCI_VDEVICE(NVIDIA, 0x07f9), board_ahci }, /* MCP73 */
471 { PCI_VDEVICE(NVIDIA, 0x07fa), board_ahci }, /* MCP73 */
472 { PCI_VDEVICE(NVIDIA, 0x07fb), board_ahci }, /* MCP73 */
473 { PCI_VDEVICE(NVIDIA, 0x0ad0), board_ahci }, /* MCP77 */
474 { PCI_VDEVICE(NVIDIA, 0x0ad1), board_ahci }, /* MCP77 */
475 { PCI_VDEVICE(NVIDIA, 0x0ad2), board_ahci }, /* MCP77 */
476 { PCI_VDEVICE(NVIDIA, 0x0ad3), board_ahci }, /* MCP77 */
477 { PCI_VDEVICE(NVIDIA, 0x0ad4), board_ahci }, /* MCP77 */
478 { PCI_VDEVICE(NVIDIA, 0x0ad5), board_ahci }, /* MCP77 */
479 { PCI_VDEVICE(NVIDIA, 0x0ad6), board_ahci }, /* MCP77 */
480 { PCI_VDEVICE(NVIDIA, 0x0ad7), board_ahci }, /* MCP77 */
481 { PCI_VDEVICE(NVIDIA, 0x0ad8), board_ahci }, /* MCP77 */
482 { PCI_VDEVICE(NVIDIA, 0x0ad9), board_ahci }, /* MCP77 */
483 { PCI_VDEVICE(NVIDIA, 0x0ada), board_ahci }, /* MCP77 */
484 { PCI_VDEVICE(NVIDIA, 0x0adb), board_ahci }, /* MCP77 */
485 { PCI_VDEVICE(NVIDIA, 0x0ab4), board_ahci }, /* MCP79 */
486 { PCI_VDEVICE(NVIDIA, 0x0ab5), board_ahci }, /* MCP79 */
487 { PCI_VDEVICE(NVIDIA, 0x0ab6), board_ahci }, /* MCP79 */
488 { PCI_VDEVICE(NVIDIA, 0x0ab7), board_ahci }, /* MCP79 */
489 { PCI_VDEVICE(NVIDIA, 0x0ab8), board_ahci }, /* MCP79 */
490 { PCI_VDEVICE(NVIDIA, 0x0ab9), board_ahci }, /* MCP79 */
491 { PCI_VDEVICE(NVIDIA, 0x0aba), board_ahci }, /* MCP79 */
492 { PCI_VDEVICE(NVIDIA, 0x0abb), board_ahci }, /* MCP79 */
493 { PCI_VDEVICE(NVIDIA, 0x0abc), board_ahci }, /* MCP79 */
494 { PCI_VDEVICE(NVIDIA, 0x0abd), board_ahci }, /* MCP79 */
495 { PCI_VDEVICE(NVIDIA, 0x0abe), board_ahci }, /* MCP79 */
496 { PCI_VDEVICE(NVIDIA, 0x0abf), board_ahci }, /* MCP79 */
497 { PCI_VDEVICE(NVIDIA, 0x0bc8), board_ahci }, /* MCP7B */
498 { PCI_VDEVICE(NVIDIA, 0x0bc9), board_ahci }, /* MCP7B */
499 { PCI_VDEVICE(NVIDIA, 0x0bca), board_ahci }, /* MCP7B */
500 { PCI_VDEVICE(NVIDIA, 0x0bcb), board_ahci }, /* MCP7B */
501 { PCI_VDEVICE(NVIDIA, 0x0bcc), board_ahci }, /* MCP7B */
502 { PCI_VDEVICE(NVIDIA, 0x0bcd), board_ahci }, /* MCP7B */
503 { PCI_VDEVICE(NVIDIA, 0x0bce), board_ahci }, /* MCP7B */
504 { PCI_VDEVICE(NVIDIA, 0x0bcf), board_ahci }, /* MCP7B */
505 { PCI_VDEVICE(NVIDIA, 0x0bd0), board_ahci }, /* MCP7B */
506 { PCI_VDEVICE(NVIDIA, 0x0bd1), board_ahci }, /* MCP7B */
507 { PCI_VDEVICE(NVIDIA, 0x0bd2), board_ahci }, /* MCP7B */
508 { PCI_VDEVICE(NVIDIA, 0x0bd3), board_ahci }, /* MCP7B */
509
510 /* SiS */
511 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
512 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 966 */
513 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
514
515 /* Marvell */
516 { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
517 { PCI_VDEVICE(MARVELL, 0x6121), board_ahci_mv }, /* 6121 */
518
519 /* Generic, PCI class code for AHCI */
520 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
521 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
522
523 { } /* terminate list */
524 };
525
526
527 static struct pci_driver ahci_pci_driver = {
528 .name = DRV_NAME,
529 .id_table = ahci_pci_tbl,
530 .probe = ahci_init_one,
531 .remove = ata_pci_remove_one,
532 #ifdef CONFIG_PM
533 .suspend = ahci_pci_device_suspend,
534 .resume = ahci_pci_device_resume,
535 #endif
536 };
537
538
539 static inline int ahci_nr_ports(u32 cap)
540 {
541 return (cap & 0x1f) + 1;
542 }
543
544 static inline void __iomem *__ahci_port_base(struct ata_host *host,
545 unsigned int port_no)
546 {
547 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
548
549 return mmio + 0x100 + (port_no * 0x80);
550 }
551
552 static inline void __iomem *ahci_port_base(struct ata_port *ap)
553 {
554 return __ahci_port_base(ap->host, ap->port_no);
555 }
556
557 static void ahci_enable_ahci(void __iomem *mmio)
558 {
559 u32 tmp;
560
561 /* turn on AHCI_EN */
562 tmp = readl(mmio + HOST_CTL);
563 if (!(tmp & HOST_AHCI_EN)) {
564 tmp |= HOST_AHCI_EN;
565 writel(tmp, mmio + HOST_CTL);
566 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
567 WARN_ON(!(tmp & HOST_AHCI_EN));
568 }
569 }
570
571 /**
572 * ahci_save_initial_config - Save and fixup initial config values
573 * @pdev: target PCI device
574 * @hpriv: host private area to store config values
575 *
576 * Some registers containing configuration info might be setup by
577 * BIOS and might be cleared on reset. This function saves the
578 * initial values of those registers into @hpriv such that they
579 * can be restored after controller reset.
580 *
581 * If inconsistent, config values are fixed up by this function.
582 *
583 * LOCKING:
584 * None.
585 */
586 static void ahci_save_initial_config(struct pci_dev *pdev,
587 struct ahci_host_priv *hpriv)
588 {
589 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
590 u32 cap, port_map;
591 int i;
592 int mv;
593
594 /* make sure AHCI mode is enabled before accessing CAP */
595 ahci_enable_ahci(mmio);
596
597 /* Values prefixed with saved_ are written back to host after
598 * reset. Values without are used for driver operation.
599 */
600 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
601 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
602
603 /* some chips have errata preventing 64bit use */
604 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
605 dev_printk(KERN_INFO, &pdev->dev,
606 "controller can't do 64bit DMA, forcing 32bit\n");
607 cap &= ~HOST_CAP_64;
608 }
609
610 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
611 dev_printk(KERN_INFO, &pdev->dev,
612 "controller can't do NCQ, turning off CAP_NCQ\n");
613 cap &= ~HOST_CAP_NCQ;
614 }
615
616 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
617 dev_printk(KERN_INFO, &pdev->dev,
618 "controller can't do PMP, turning off CAP_PMP\n");
619 cap &= ~HOST_CAP_PMP;
620 }
621
622 /*
623 * Temporary Marvell 6145 hack: PATA port presence
624 * is asserted through the standard AHCI port
625 * presence register, as bit 4 (counting from 0)
626 */
627 if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
628 if (pdev->device == 0x6121)
629 mv = 0x3;
630 else
631 mv = 0xf;
632 dev_printk(KERN_ERR, &pdev->dev,
633 "MV_AHCI HACK: port_map %x -> %x\n",
634 port_map,
635 port_map & mv);
636
637 port_map &= mv;
638 }
639
640 /* cross check port_map and cap.n_ports */
641 if (port_map) {
642 int map_ports = 0;
643
644 for (i = 0; i < AHCI_MAX_PORTS; i++)
645 if (port_map & (1 << i))
646 map_ports++;
647
648 /* If PI has more ports than n_ports, whine, clear
649 * port_map and let it be generated from n_ports.
650 */
651 if (map_ports > ahci_nr_ports(cap)) {
652 dev_printk(KERN_WARNING, &pdev->dev,
653 "implemented port map (0x%x) contains more "
654 "ports than nr_ports (%u), using nr_ports\n",
655 port_map, ahci_nr_ports(cap));
656 port_map = 0;
657 }
658 }
659
660 /* fabricate port_map from cap.nr_ports */
661 if (!port_map) {
662 port_map = (1 << ahci_nr_ports(cap)) - 1;
663 dev_printk(KERN_WARNING, &pdev->dev,
664 "forcing PORTS_IMPL to 0x%x\n", port_map);
665
666 /* write the fixed up value to the PI register */
667 hpriv->saved_port_map = port_map;
668 }
669
670 /* record values to use during operation */
671 hpriv->cap = cap;
672 hpriv->port_map = port_map;
673 }
674
675 /**
676 * ahci_restore_initial_config - Restore initial config
677 * @host: target ATA host
678 *
679 * Restore initial config stored by ahci_save_initial_config().
680 *
681 * LOCKING:
682 * None.
683 */
684 static void ahci_restore_initial_config(struct ata_host *host)
685 {
686 struct ahci_host_priv *hpriv = host->private_data;
687 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
688
689 writel(hpriv->saved_cap, mmio + HOST_CAP);
690 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
691 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
692 }
693
694 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
695 {
696 static const int offset[] = {
697 [SCR_STATUS] = PORT_SCR_STAT,
698 [SCR_CONTROL] = PORT_SCR_CTL,
699 [SCR_ERROR] = PORT_SCR_ERR,
700 [SCR_ACTIVE] = PORT_SCR_ACT,
701 [SCR_NOTIFICATION] = PORT_SCR_NTF,
702 };
703 struct ahci_host_priv *hpriv = ap->host->private_data;
704
705 if (sc_reg < ARRAY_SIZE(offset) &&
706 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
707 return offset[sc_reg];
708 return 0;
709 }
710
711 static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val)
712 {
713 void __iomem *port_mmio = ahci_port_base(ap);
714 int offset = ahci_scr_offset(ap, sc_reg);
715
716 if (offset) {
717 *val = readl(port_mmio + offset);
718 return 0;
719 }
720 return -EINVAL;
721 }
722
723 static int ahci_scr_write(struct ata_port *ap, unsigned int sc_reg, u32 val)
724 {
725 void __iomem *port_mmio = ahci_port_base(ap);
726 int offset = ahci_scr_offset(ap, sc_reg);
727
728 if (offset) {
729 writel(val, port_mmio + offset);
730 return 0;
731 }
732 return -EINVAL;
733 }
734
735 static void ahci_start_engine(struct ata_port *ap)
736 {
737 void __iomem *port_mmio = ahci_port_base(ap);
738 u32 tmp;
739
740 /* start DMA */
741 tmp = readl(port_mmio + PORT_CMD);
742 tmp |= PORT_CMD_START;
743 writel(tmp, port_mmio + PORT_CMD);
744 readl(port_mmio + PORT_CMD); /* flush */
745 }
746
747 static int ahci_stop_engine(struct ata_port *ap)
748 {
749 void __iomem *port_mmio = ahci_port_base(ap);
750 u32 tmp;
751
752 tmp = readl(port_mmio + PORT_CMD);
753
754 /* check if the HBA is idle */
755 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
756 return 0;
757
758 /* setting HBA to idle */
759 tmp &= ~PORT_CMD_START;
760 writel(tmp, port_mmio + PORT_CMD);
761
762 /* wait for engine to stop. This could be as long as 500 msec */
763 tmp = ata_wait_register(port_mmio + PORT_CMD,
764 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
765 if (tmp & PORT_CMD_LIST_ON)
766 return -EIO;
767
768 return 0;
769 }
770
771 static void ahci_start_fis_rx(struct ata_port *ap)
772 {
773 void __iomem *port_mmio = ahci_port_base(ap);
774 struct ahci_host_priv *hpriv = ap->host->private_data;
775 struct ahci_port_priv *pp = ap->private_data;
776 u32 tmp;
777
778 /* set FIS registers */
779 if (hpriv->cap & HOST_CAP_64)
780 writel((pp->cmd_slot_dma >> 16) >> 16,
781 port_mmio + PORT_LST_ADDR_HI);
782 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
783
784 if (hpriv->cap & HOST_CAP_64)
785 writel((pp->rx_fis_dma >> 16) >> 16,
786 port_mmio + PORT_FIS_ADDR_HI);
787 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
788
789 /* enable FIS reception */
790 tmp = readl(port_mmio + PORT_CMD);
791 tmp |= PORT_CMD_FIS_RX;
792 writel(tmp, port_mmio + PORT_CMD);
793
794 /* flush */
795 readl(port_mmio + PORT_CMD);
796 }
797
798 static int ahci_stop_fis_rx(struct ata_port *ap)
799 {
800 void __iomem *port_mmio = ahci_port_base(ap);
801 u32 tmp;
802
803 /* disable FIS reception */
804 tmp = readl(port_mmio + PORT_CMD);
805 tmp &= ~PORT_CMD_FIS_RX;
806 writel(tmp, port_mmio + PORT_CMD);
807
808 /* wait for completion, spec says 500ms, give it 1000 */
809 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
810 PORT_CMD_FIS_ON, 10, 1000);
811 if (tmp & PORT_CMD_FIS_ON)
812 return -EBUSY;
813
814 return 0;
815 }
816
817 static void ahci_power_up(struct ata_port *ap)
818 {
819 struct ahci_host_priv *hpriv = ap->host->private_data;
820 void __iomem *port_mmio = ahci_port_base(ap);
821 u32 cmd;
822
823 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
824
825 /* spin up device */
826 if (hpriv->cap & HOST_CAP_SSS) {
827 cmd |= PORT_CMD_SPIN_UP;
828 writel(cmd, port_mmio + PORT_CMD);
829 }
830
831 /* wake up link */
832 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
833 }
834
835 static void ahci_disable_alpm(struct ata_port *ap)
836 {
837 struct ahci_host_priv *hpriv = ap->host->private_data;
838 void __iomem *port_mmio = ahci_port_base(ap);
839 u32 cmd;
840 struct ahci_port_priv *pp = ap->private_data;
841
842 /* IPM bits should be disabled by libata-core */
843 /* get the existing command bits */
844 cmd = readl(port_mmio + PORT_CMD);
845
846 /* disable ALPM and ASP */
847 cmd &= ~PORT_CMD_ASP;
848 cmd &= ~PORT_CMD_ALPE;
849
850 /* force the interface back to active */
851 cmd |= PORT_CMD_ICC_ACTIVE;
852
853 /* write out new cmd value */
854 writel(cmd, port_mmio + PORT_CMD);
855 cmd = readl(port_mmio + PORT_CMD);
856
857 /* wait 10ms to be sure we've come out of any low power state */
858 msleep(10);
859
860 /* clear out any PhyRdy stuff from interrupt status */
861 writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT);
862
863 /* go ahead and clean out PhyRdy Change from Serror too */
864 ahci_scr_write(ap, SCR_ERROR, ((1 << 16) | (1 << 18)));
865
866 /*
867 * Clear flag to indicate that we should ignore all PhyRdy
868 * state changes
869 */
870 hpriv->flags &= ~AHCI_HFLAG_NO_HOTPLUG;
871
872 /*
873 * Enable interrupts on Phy Ready.
874 */
875 pp->intr_mask |= PORT_IRQ_PHYRDY;
876 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
877
878 /*
879 * don't change the link pm policy - we can be called
880 * just to turn of link pm temporarily
881 */
882 }
883
884 static int ahci_enable_alpm(struct ata_port *ap,
885 enum link_pm policy)
886 {
887 struct ahci_host_priv *hpriv = ap->host->private_data;
888 void __iomem *port_mmio = ahci_port_base(ap);
889 u32 cmd;
890 struct ahci_port_priv *pp = ap->private_data;
891 u32 asp;
892
893 /* Make sure the host is capable of link power management */
894 if (!(hpriv->cap & HOST_CAP_ALPM))
895 return -EINVAL;
896
897 switch (policy) {
898 case MAX_PERFORMANCE:
899 case NOT_AVAILABLE:
900 /*
901 * if we came here with NOT_AVAILABLE,
902 * it just means this is the first time we
903 * have tried to enable - default to max performance,
904 * and let the user go to lower power modes on request.
905 */
906 ahci_disable_alpm(ap);
907 return 0;
908 case MIN_POWER:
909 /* configure HBA to enter SLUMBER */
910 asp = PORT_CMD_ASP;
911 break;
912 case MEDIUM_POWER:
913 /* configure HBA to enter PARTIAL */
914 asp = 0;
915 break;
916 default:
917 return -EINVAL;
918 }
919
920 /*
921 * Disable interrupts on Phy Ready. This keeps us from
922 * getting woken up due to spurious phy ready interrupts
923 * TBD - Hot plug should be done via polling now, is
924 * that even supported?
925 */
926 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
927 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
928
929 /*
930 * Set a flag to indicate that we should ignore all PhyRdy
931 * state changes since these can happen now whenever we
932 * change link state
933 */
934 hpriv->flags |= AHCI_HFLAG_NO_HOTPLUG;
935
936 /* get the existing command bits */
937 cmd = readl(port_mmio + PORT_CMD);
938
939 /*
940 * Set ASP based on Policy
941 */
942 cmd |= asp;
943
944 /*
945 * Setting this bit will instruct the HBA to aggressively
946 * enter a lower power link state when it's appropriate and
947 * based on the value set above for ASP
948 */
949 cmd |= PORT_CMD_ALPE;
950
951 /* write out new cmd value */
952 writel(cmd, port_mmio + PORT_CMD);
953 cmd = readl(port_mmio + PORT_CMD);
954
955 /* IPM bits should be set by libata-core */
956 return 0;
957 }
958
959 #ifdef CONFIG_PM
960 static void ahci_power_down(struct ata_port *ap)
961 {
962 struct ahci_host_priv *hpriv = ap->host->private_data;
963 void __iomem *port_mmio = ahci_port_base(ap);
964 u32 cmd, scontrol;
965
966 if (!(hpriv->cap & HOST_CAP_SSS))
967 return;
968
969 /* put device into listen mode, first set PxSCTL.DET to 0 */
970 scontrol = readl(port_mmio + PORT_SCR_CTL);
971 scontrol &= ~0xf;
972 writel(scontrol, port_mmio + PORT_SCR_CTL);
973
974 /* then set PxCMD.SUD to 0 */
975 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
976 cmd &= ~PORT_CMD_SPIN_UP;
977 writel(cmd, port_mmio + PORT_CMD);
978 }
979 #endif
980
981 static void ahci_start_port(struct ata_port *ap)
982 {
983 /* enable FIS reception */
984 ahci_start_fis_rx(ap);
985
986 /* enable DMA */
987 ahci_start_engine(ap);
988 }
989
990 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
991 {
992 int rc;
993
994 /* disable DMA */
995 rc = ahci_stop_engine(ap);
996 if (rc) {
997 *emsg = "failed to stop engine";
998 return rc;
999 }
1000
1001 /* disable FIS reception */
1002 rc = ahci_stop_fis_rx(ap);
1003 if (rc) {
1004 *emsg = "failed stop FIS RX";
1005 return rc;
1006 }
1007
1008 return 0;
1009 }
1010
1011 static int ahci_reset_controller(struct ata_host *host)
1012 {
1013 struct pci_dev *pdev = to_pci_dev(host->dev);
1014 struct ahci_host_priv *hpriv = host->private_data;
1015 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1016 u32 tmp;
1017
1018 /* we must be in AHCI mode, before using anything
1019 * AHCI-specific, such as HOST_RESET.
1020 */
1021 ahci_enable_ahci(mmio);
1022
1023 /* global controller reset */
1024 if (!ahci_skip_host_reset) {
1025 tmp = readl(mmio + HOST_CTL);
1026 if ((tmp & HOST_RESET) == 0) {
1027 writel(tmp | HOST_RESET, mmio + HOST_CTL);
1028 readl(mmio + HOST_CTL); /* flush */
1029 }
1030
1031 /* reset must complete within 1 second, or
1032 * the hardware should be considered fried.
1033 */
1034 ssleep(1);
1035
1036 tmp = readl(mmio + HOST_CTL);
1037 if (tmp & HOST_RESET) {
1038 dev_printk(KERN_ERR, host->dev,
1039 "controller reset failed (0x%x)\n", tmp);
1040 return -EIO;
1041 }
1042
1043 /* turn on AHCI mode */
1044 ahci_enable_ahci(mmio);
1045
1046 /* Some registers might be cleared on reset. Restore
1047 * initial values.
1048 */
1049 ahci_restore_initial_config(host);
1050 } else
1051 dev_printk(KERN_INFO, host->dev,
1052 "skipping global host reset\n");
1053
1054 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
1055 u16 tmp16;
1056
1057 /* configure PCS */
1058 pci_read_config_word(pdev, 0x92, &tmp16);
1059 if ((tmp16 & hpriv->port_map) != hpriv->port_map) {
1060 tmp16 |= hpriv->port_map;
1061 pci_write_config_word(pdev, 0x92, tmp16);
1062 }
1063 }
1064
1065 return 0;
1066 }
1067
1068 static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
1069 int port_no, void __iomem *mmio,
1070 void __iomem *port_mmio)
1071 {
1072 const char *emsg = NULL;
1073 int rc;
1074 u32 tmp;
1075
1076 /* make sure port is not active */
1077 rc = ahci_deinit_port(ap, &emsg);
1078 if (rc)
1079 dev_printk(KERN_WARNING, &pdev->dev,
1080 "%s (%d)\n", emsg, rc);
1081
1082 /* clear SError */
1083 tmp = readl(port_mmio + PORT_SCR_ERR);
1084 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1085 writel(tmp, port_mmio + PORT_SCR_ERR);
1086
1087 /* clear port IRQ */
1088 tmp = readl(port_mmio + PORT_IRQ_STAT);
1089 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1090 if (tmp)
1091 writel(tmp, port_mmio + PORT_IRQ_STAT);
1092
1093 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1094 }
1095
1096 static void ahci_init_controller(struct ata_host *host)
1097 {
1098 struct ahci_host_priv *hpriv = host->private_data;
1099 struct pci_dev *pdev = to_pci_dev(host->dev);
1100 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1101 int i;
1102 void __iomem *port_mmio;
1103 u32 tmp;
1104 int mv;
1105
1106 if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
1107 if (pdev->device == 0x6121)
1108 mv = 2;
1109 else
1110 mv = 4;
1111 port_mmio = __ahci_port_base(host, mv);
1112
1113 writel(0, port_mmio + PORT_IRQ_MASK);
1114
1115 /* clear port IRQ */
1116 tmp = readl(port_mmio + PORT_IRQ_STAT);
1117 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1118 if (tmp)
1119 writel(tmp, port_mmio + PORT_IRQ_STAT);
1120 }
1121
1122 for (i = 0; i < host->n_ports; i++) {
1123 struct ata_port *ap = host->ports[i];
1124
1125 port_mmio = ahci_port_base(ap);
1126 if (ata_port_is_dummy(ap))
1127 continue;
1128
1129 ahci_port_init(pdev, ap, i, mmio, port_mmio);
1130 }
1131
1132 tmp = readl(mmio + HOST_CTL);
1133 VPRINTK("HOST_CTL 0x%x\n", tmp);
1134 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1135 tmp = readl(mmio + HOST_CTL);
1136 VPRINTK("HOST_CTL 0x%x\n", tmp);
1137 }
1138
1139 static void ahci_dev_config(struct ata_device *dev)
1140 {
1141 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1142
1143 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1144 dev->max_sectors = 255;
1145 ata_dev_printk(dev, KERN_INFO,
1146 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1147 }
1148 }
1149
1150 static unsigned int ahci_dev_classify(struct ata_port *ap)
1151 {
1152 void __iomem *port_mmio = ahci_port_base(ap);
1153 struct ata_taskfile tf;
1154 u32 tmp;
1155
1156 tmp = readl(port_mmio + PORT_SIG);
1157 tf.lbah = (tmp >> 24) & 0xff;
1158 tf.lbam = (tmp >> 16) & 0xff;
1159 tf.lbal = (tmp >> 8) & 0xff;
1160 tf.nsect = (tmp) & 0xff;
1161
1162 return ata_dev_classify(&tf);
1163 }
1164
1165 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1166 u32 opts)
1167 {
1168 dma_addr_t cmd_tbl_dma;
1169
1170 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1171
1172 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1173 pp->cmd_slot[tag].status = 0;
1174 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1175 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1176 }
1177
1178 static int ahci_kick_engine(struct ata_port *ap, int force_restart)
1179 {
1180 void __iomem *port_mmio = ahci_port_base(ap);
1181 struct ahci_host_priv *hpriv = ap->host->private_data;
1182 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1183 u32 tmp;
1184 int busy, rc;
1185
1186 /* do we need to kick the port? */
1187 busy = status & (ATA_BUSY | ATA_DRQ);
1188 if (!busy && !force_restart)
1189 return 0;
1190
1191 /* stop engine */
1192 rc = ahci_stop_engine(ap);
1193 if (rc)
1194 goto out_restart;
1195
1196 /* need to do CLO? */
1197 if (!busy) {
1198 rc = 0;
1199 goto out_restart;
1200 }
1201
1202 if (!(hpriv->cap & HOST_CAP_CLO)) {
1203 rc = -EOPNOTSUPP;
1204 goto out_restart;
1205 }
1206
1207 /* perform CLO */
1208 tmp = readl(port_mmio + PORT_CMD);
1209 tmp |= PORT_CMD_CLO;
1210 writel(tmp, port_mmio + PORT_CMD);
1211
1212 rc = 0;
1213 tmp = ata_wait_register(port_mmio + PORT_CMD,
1214 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1215 if (tmp & PORT_CMD_CLO)
1216 rc = -EIO;
1217
1218 /* restart engine */
1219 out_restart:
1220 ahci_start_engine(ap);
1221 return rc;
1222 }
1223
1224 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1225 struct ata_taskfile *tf, int is_cmd, u16 flags,
1226 unsigned long timeout_msec)
1227 {
1228 const u32 cmd_fis_len = 5; /* five dwords */
1229 struct ahci_port_priv *pp = ap->private_data;
1230 void __iomem *port_mmio = ahci_port_base(ap);
1231 u8 *fis = pp->cmd_tbl;
1232 u32 tmp;
1233
1234 /* prep the command */
1235 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1236 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1237
1238 /* issue & wait */
1239 writel(1, port_mmio + PORT_CMD_ISSUE);
1240
1241 if (timeout_msec) {
1242 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
1243 1, timeout_msec);
1244 if (tmp & 0x1) {
1245 ahci_kick_engine(ap, 1);
1246 return -EBUSY;
1247 }
1248 } else
1249 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1250
1251 return 0;
1252 }
1253
1254 static int ahci_check_ready(struct ata_link *link)
1255 {
1256 void __iomem *port_mmio = ahci_port_base(link->ap);
1257 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1258
1259 if (!(status & ATA_BUSY))
1260 return 1;
1261 return 0;
1262 }
1263
1264 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1265 unsigned long deadline)
1266 {
1267 struct ata_port *ap = link->ap;
1268 int pmp = sata_srst_pmp(link);
1269 const char *reason = NULL;
1270 unsigned long now, msecs;
1271 struct ata_taskfile tf;
1272 int rc;
1273
1274 DPRINTK("ENTER\n");
1275
1276 /* prepare for SRST (AHCI-1.1 10.4.1) */
1277 rc = ahci_kick_engine(ap, 1);
1278 if (rc && rc != -EOPNOTSUPP)
1279 ata_link_printk(link, KERN_WARNING,
1280 "failed to reset engine (errno=%d)\n", rc);
1281
1282 ata_tf_init(link->device, &tf);
1283
1284 /* issue the first D2H Register FIS */
1285 msecs = 0;
1286 now = jiffies;
1287 if (time_after(now, deadline))
1288 msecs = jiffies_to_msecs(deadline - now);
1289
1290 tf.ctl |= ATA_SRST;
1291 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1292 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1293 rc = -EIO;
1294 reason = "1st FIS failed";
1295 goto fail;
1296 }
1297
1298 /* spec says at least 5us, but be generous and sleep for 1ms */
1299 msleep(1);
1300
1301 /* issue the second D2H Register FIS */
1302 tf.ctl &= ~ATA_SRST;
1303 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1304
1305 /* wait for link to become ready */
1306 rc = ata_wait_after_reset(link, deadline, ahci_check_ready);
1307 /* link occupied, -ENODEV too is an error */
1308 if (rc) {
1309 reason = "device not ready";
1310 goto fail;
1311 }
1312 *class = ahci_dev_classify(ap);
1313
1314 DPRINTK("EXIT, class=%u\n", *class);
1315 return 0;
1316
1317 fail:
1318 ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
1319 return rc;
1320 }
1321
1322 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1323 unsigned long deadline)
1324 {
1325 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1326 struct ata_port *ap = link->ap;
1327 struct ahci_port_priv *pp = ap->private_data;
1328 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1329 struct ata_taskfile tf;
1330 bool online;
1331 int rc;
1332
1333 DPRINTK("ENTER\n");
1334
1335 ahci_stop_engine(ap);
1336
1337 /* clear D2H reception area to properly wait for D2H FIS */
1338 ata_tf_init(link->device, &tf);
1339 tf.command = 0x80;
1340 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1341
1342 rc = sata_link_hardreset(link, timing, deadline, &online,
1343 ahci_check_ready);
1344
1345 ahci_start_engine(ap);
1346
1347 if (online)
1348 *class = ahci_dev_classify(ap);
1349
1350 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1351 return rc;
1352 }
1353
1354 static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
1355 unsigned long deadline)
1356 {
1357 struct ata_port *ap = link->ap;
1358 bool online;
1359 int rc;
1360
1361 DPRINTK("ENTER\n");
1362
1363 ahci_stop_engine(ap);
1364
1365 rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
1366 deadline, &online, NULL);
1367
1368 ahci_start_engine(ap);
1369
1370 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1371
1372 /* vt8251 doesn't clear BSY on signature FIS reception,
1373 * request follow-up softreset.
1374 */
1375 return online ? -EAGAIN : rc;
1376 }
1377
1378 static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
1379 unsigned long deadline)
1380 {
1381 struct ata_port *ap = link->ap;
1382 struct ahci_port_priv *pp = ap->private_data;
1383 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1384 struct ata_taskfile tf;
1385 bool online;
1386 int rc;
1387
1388 ahci_stop_engine(ap);
1389
1390 /* clear D2H reception area to properly wait for D2H FIS */
1391 ata_tf_init(link->device, &tf);
1392 tf.command = 0x80;
1393 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1394
1395 rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
1396 deadline, &online, NULL);
1397
1398 ahci_start_engine(ap);
1399
1400 /* The pseudo configuration device on SIMG4726 attached to
1401 * ASUS P5W-DH Deluxe doesn't send signature FIS after
1402 * hardreset if no device is attached to the first downstream
1403 * port && the pseudo device locks up on SRST w/ PMP==0. To
1404 * work around this, wait for !BSY only briefly. If BSY isn't
1405 * cleared, perform CLO and proceed to IDENTIFY (achieved by
1406 * ATA_LFLAG_NO_SRST and ATA_LFLAG_ASSUME_ATA).
1407 *
1408 * Wait for two seconds. Devices attached to downstream port
1409 * which can't process the following IDENTIFY after this will
1410 * have to be reset again. For most cases, this should
1411 * suffice while making probing snappish enough.
1412 */
1413 if (online) {
1414 rc = ata_wait_after_reset(link, jiffies + 2 * HZ,
1415 ahci_check_ready);
1416 if (rc)
1417 ahci_kick_engine(ap, 0);
1418 }
1419 return rc;
1420 }
1421
1422 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1423 {
1424 struct ata_port *ap = link->ap;
1425 void __iomem *port_mmio = ahci_port_base(ap);
1426 u32 new_tmp, tmp;
1427
1428 ata_std_postreset(link, class);
1429
1430 /* Make sure port's ATAPI bit is set appropriately */
1431 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1432 if (*class == ATA_DEV_ATAPI)
1433 new_tmp |= PORT_CMD_ATAPI;
1434 else
1435 new_tmp &= ~PORT_CMD_ATAPI;
1436 if (new_tmp != tmp) {
1437 writel(new_tmp, port_mmio + PORT_CMD);
1438 readl(port_mmio + PORT_CMD); /* flush */
1439 }
1440 }
1441
1442 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1443 {
1444 struct scatterlist *sg;
1445 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1446 unsigned int si;
1447
1448 VPRINTK("ENTER\n");
1449
1450 /*
1451 * Next, the S/G list.
1452 */
1453 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1454 dma_addr_t addr = sg_dma_address(sg);
1455 u32 sg_len = sg_dma_len(sg);
1456
1457 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1458 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1459 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1460 }
1461
1462 return si;
1463 }
1464
1465 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1466 {
1467 struct ata_port *ap = qc->ap;
1468 struct ahci_port_priv *pp = ap->private_data;
1469 int is_atapi = ata_is_atapi(qc->tf.protocol);
1470 void *cmd_tbl;
1471 u32 opts;
1472 const u32 cmd_fis_len = 5; /* five dwords */
1473 unsigned int n_elem;
1474
1475 /*
1476 * Fill in command table information. First, the header,
1477 * a SATA Register - Host to Device command FIS.
1478 */
1479 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1480
1481 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1482 if (is_atapi) {
1483 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1484 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1485 }
1486
1487 n_elem = 0;
1488 if (qc->flags & ATA_QCFLAG_DMAMAP)
1489 n_elem = ahci_fill_sg(qc, cmd_tbl);
1490
1491 /*
1492 * Fill in command slot information.
1493 */
1494 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1495 if (qc->tf.flags & ATA_TFLAG_WRITE)
1496 opts |= AHCI_CMD_WRITE;
1497 if (is_atapi)
1498 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1499
1500 ahci_fill_cmd_slot(pp, qc->tag, opts);
1501 }
1502
1503 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1504 {
1505 struct ahci_host_priv *hpriv = ap->host->private_data;
1506 struct ahci_port_priv *pp = ap->private_data;
1507 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1508 struct ata_link *link = NULL;
1509 struct ata_queued_cmd *active_qc;
1510 struct ata_eh_info *active_ehi;
1511 u32 serror;
1512
1513 /* determine active link */
1514 ata_port_for_each_link(link, ap)
1515 if (ata_link_active(link))
1516 break;
1517 if (!link)
1518 link = &ap->link;
1519
1520 active_qc = ata_qc_from_tag(ap, link->active_tag);
1521 active_ehi = &link->eh_info;
1522
1523 /* record irq stat */
1524 ata_ehi_clear_desc(host_ehi);
1525 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1526
1527 /* AHCI needs SError cleared; otherwise, it might lock up */
1528 ahci_scr_read(ap, SCR_ERROR, &serror);
1529 ahci_scr_write(ap, SCR_ERROR, serror);
1530 host_ehi->serror |= serror;
1531
1532 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1533 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1534 irq_stat &= ~PORT_IRQ_IF_ERR;
1535
1536 if (irq_stat & PORT_IRQ_TF_ERR) {
1537 /* If qc is active, charge it; otherwise, the active
1538 * link. There's no active qc on NCQ errors. It will
1539 * be determined by EH by reading log page 10h.
1540 */
1541 if (active_qc)
1542 active_qc->err_mask |= AC_ERR_DEV;
1543 else
1544 active_ehi->err_mask |= AC_ERR_DEV;
1545
1546 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1547 host_ehi->serror &= ~SERR_INTERNAL;
1548 }
1549
1550 if (irq_stat & PORT_IRQ_UNK_FIS) {
1551 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1552
1553 active_ehi->err_mask |= AC_ERR_HSM;
1554 active_ehi->action |= ATA_EH_RESET;
1555 ata_ehi_push_desc(active_ehi,
1556 "unknown FIS %08x %08x %08x %08x" ,
1557 unk[0], unk[1], unk[2], unk[3]);
1558 }
1559
1560 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1561 active_ehi->err_mask |= AC_ERR_HSM;
1562 active_ehi->action |= ATA_EH_RESET;
1563 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1564 }
1565
1566 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
1567 host_ehi->err_mask |= AC_ERR_HOST_BUS;
1568 host_ehi->action |= ATA_EH_RESET;
1569 ata_ehi_push_desc(host_ehi, "host bus error");
1570 }
1571
1572 if (irq_stat & PORT_IRQ_IF_ERR) {
1573 host_ehi->err_mask |= AC_ERR_ATA_BUS;
1574 host_ehi->action |= ATA_EH_RESET;
1575 ata_ehi_push_desc(host_ehi, "interface fatal error");
1576 }
1577
1578 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
1579 ata_ehi_hotplugged(host_ehi);
1580 ata_ehi_push_desc(host_ehi, "%s",
1581 irq_stat & PORT_IRQ_CONNECT ?
1582 "connection status changed" : "PHY RDY changed");
1583 }
1584
1585 /* okay, let's hand over to EH */
1586
1587 if (irq_stat & PORT_IRQ_FREEZE)
1588 ata_port_freeze(ap);
1589 else
1590 ata_port_abort(ap);
1591 }
1592
1593 static void ahci_port_intr(struct ata_port *ap)
1594 {
1595 void __iomem *port_mmio = ahci_port_base(ap);
1596 struct ata_eh_info *ehi = &ap->link.eh_info;
1597 struct ahci_port_priv *pp = ap->private_data;
1598 struct ahci_host_priv *hpriv = ap->host->private_data;
1599 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
1600 u32 status, qc_active;
1601 int rc;
1602
1603 status = readl(port_mmio + PORT_IRQ_STAT);
1604 writel(status, port_mmio + PORT_IRQ_STAT);
1605
1606 /* ignore BAD_PMP while resetting */
1607 if (unlikely(resetting))
1608 status &= ~PORT_IRQ_BAD_PMP;
1609
1610 /* If we are getting PhyRdy, this is
1611 * just a power state change, we should
1612 * clear out this, plus the PhyRdy/Comm
1613 * Wake bits from Serror
1614 */
1615 if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) &&
1616 (status & PORT_IRQ_PHYRDY)) {
1617 status &= ~PORT_IRQ_PHYRDY;
1618 ahci_scr_write(ap, SCR_ERROR, ((1 << 16) | (1 << 18)));
1619 }
1620
1621 if (unlikely(status & PORT_IRQ_ERROR)) {
1622 ahci_error_intr(ap, status);
1623 return;
1624 }
1625
1626 if (status & PORT_IRQ_SDB_FIS) {
1627 /* If SNotification is available, leave notification
1628 * handling to sata_async_notification(). If not,
1629 * emulate it by snooping SDB FIS RX area.
1630 *
1631 * Snooping FIS RX area is probably cheaper than
1632 * poking SNotification but some constrollers which
1633 * implement SNotification, ICH9 for example, don't
1634 * store AN SDB FIS into receive area.
1635 */
1636 if (hpriv->cap & HOST_CAP_SNTF)
1637 sata_async_notification(ap);
1638 else {
1639 /* If the 'N' bit in word 0 of the FIS is set,
1640 * we just received asynchronous notification.
1641 * Tell libata about it.
1642 */
1643 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
1644 u32 f0 = le32_to_cpu(f[0]);
1645
1646 if (f0 & (1 << 15))
1647 sata_async_notification(ap);
1648 }
1649 }
1650
1651 /* pp->active_link is valid iff any command is in flight */
1652 if (ap->qc_active && pp->active_link->sactive)
1653 qc_active = readl(port_mmio + PORT_SCR_ACT);
1654 else
1655 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
1656
1657 rc = ata_qc_complete_multiple(ap, qc_active);
1658
1659 /* while resetting, invalid completions are expected */
1660 if (unlikely(rc < 0 && !resetting)) {
1661 ehi->err_mask |= AC_ERR_HSM;
1662 ehi->action |= ATA_EH_RESET;
1663 ata_port_freeze(ap);
1664 }
1665 }
1666
1667 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
1668 {
1669 struct ata_host *host = dev_instance;
1670 struct ahci_host_priv *hpriv;
1671 unsigned int i, handled = 0;
1672 void __iomem *mmio;
1673 u32 irq_stat, irq_ack = 0;
1674
1675 VPRINTK("ENTER\n");
1676
1677 hpriv = host->private_data;
1678 mmio = host->iomap[AHCI_PCI_BAR];
1679
1680 /* sigh. 0xffffffff is a valid return from h/w */
1681 irq_stat = readl(mmio + HOST_IRQ_STAT);
1682 irq_stat &= hpriv->port_map;
1683 if (!irq_stat)
1684 return IRQ_NONE;
1685
1686 spin_lock(&host->lock);
1687
1688 for (i = 0; i < host->n_ports; i++) {
1689 struct ata_port *ap;
1690
1691 if (!(irq_stat & (1 << i)))
1692 continue;
1693
1694 ap = host->ports[i];
1695 if (ap) {
1696 ahci_port_intr(ap);
1697 VPRINTK("port %u\n", i);
1698 } else {
1699 VPRINTK("port %u (no irq)\n", i);
1700 if (ata_ratelimit())
1701 dev_printk(KERN_WARNING, host->dev,
1702 "interrupt on disabled port %u\n", i);
1703 }
1704
1705 irq_ack |= (1 << i);
1706 }
1707
1708 if (irq_ack) {
1709 writel(irq_ack, mmio + HOST_IRQ_STAT);
1710 handled = 1;
1711 }
1712
1713 spin_unlock(&host->lock);
1714
1715 VPRINTK("EXIT\n");
1716
1717 return IRQ_RETVAL(handled);
1718 }
1719
1720 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1721 {
1722 struct ata_port *ap = qc->ap;
1723 void __iomem *port_mmio = ahci_port_base(ap);
1724 struct ahci_port_priv *pp = ap->private_data;
1725
1726 /* Keep track of the currently active link. It will be used
1727 * in completion path to determine whether NCQ phase is in
1728 * progress.
1729 */
1730 pp->active_link = qc->dev->link;
1731
1732 if (qc->tf.protocol == ATA_PROT_NCQ)
1733 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
1734 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1735 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1736
1737 return 0;
1738 }
1739
1740 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
1741 {
1742 struct ahci_port_priv *pp = qc->ap->private_data;
1743 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1744
1745 ata_tf_from_fis(d2h_fis, &qc->result_tf);
1746 return true;
1747 }
1748
1749 static void ahci_freeze(struct ata_port *ap)
1750 {
1751 void __iomem *port_mmio = ahci_port_base(ap);
1752
1753 /* turn IRQ off */
1754 writel(0, port_mmio + PORT_IRQ_MASK);
1755 }
1756
1757 static void ahci_thaw(struct ata_port *ap)
1758 {
1759 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1760 void __iomem *port_mmio = ahci_port_base(ap);
1761 u32 tmp;
1762 struct ahci_port_priv *pp = ap->private_data;
1763
1764 /* clear IRQ */
1765 tmp = readl(port_mmio + PORT_IRQ_STAT);
1766 writel(tmp, port_mmio + PORT_IRQ_STAT);
1767 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
1768
1769 /* turn IRQ back on */
1770 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1771 }
1772
1773 static void ahci_error_handler(struct ata_port *ap)
1774 {
1775 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
1776 /* restart engine */
1777 ahci_stop_engine(ap);
1778 ahci_start_engine(ap);
1779 }
1780
1781 sata_pmp_error_handler(ap);
1782 }
1783
1784 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
1785 {
1786 struct ata_port *ap = qc->ap;
1787
1788 /* make DMA engine forget about the failed command */
1789 if (qc->flags & ATA_QCFLAG_FAILED)
1790 ahci_kick_engine(ap, 1);
1791 }
1792
1793 static void ahci_pmp_attach(struct ata_port *ap)
1794 {
1795 void __iomem *port_mmio = ahci_port_base(ap);
1796 struct ahci_port_priv *pp = ap->private_data;
1797 u32 cmd;
1798
1799 cmd = readl(port_mmio + PORT_CMD);
1800 cmd |= PORT_CMD_PMP;
1801 writel(cmd, port_mmio + PORT_CMD);
1802
1803 pp->intr_mask |= PORT_IRQ_BAD_PMP;
1804 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1805 }
1806
1807 static void ahci_pmp_detach(struct ata_port *ap)
1808 {
1809 void __iomem *port_mmio = ahci_port_base(ap);
1810 struct ahci_port_priv *pp = ap->private_data;
1811 u32 cmd;
1812
1813 cmd = readl(port_mmio + PORT_CMD);
1814 cmd &= ~PORT_CMD_PMP;
1815 writel(cmd, port_mmio + PORT_CMD);
1816
1817 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
1818 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1819 }
1820
1821 static int ahci_port_resume(struct ata_port *ap)
1822 {
1823 ahci_power_up(ap);
1824 ahci_start_port(ap);
1825
1826 if (sata_pmp_attached(ap))
1827 ahci_pmp_attach(ap);
1828 else
1829 ahci_pmp_detach(ap);
1830
1831 return 0;
1832 }
1833
1834 #ifdef CONFIG_PM
1835 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
1836 {
1837 const char *emsg = NULL;
1838 int rc;
1839
1840 rc = ahci_deinit_port(ap, &emsg);
1841 if (rc == 0)
1842 ahci_power_down(ap);
1843 else {
1844 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
1845 ahci_start_port(ap);
1846 }
1847
1848 return rc;
1849 }
1850
1851 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
1852 {
1853 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1854 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1855 u32 ctl;
1856
1857 if (mesg.event & PM_EVENT_SLEEP) {
1858 /* AHCI spec rev1.1 section 8.3.3:
1859 * Software must disable interrupts prior to requesting a
1860 * transition of the HBA to D3 state.
1861 */
1862 ctl = readl(mmio + HOST_CTL);
1863 ctl &= ~HOST_IRQ_EN;
1864 writel(ctl, mmio + HOST_CTL);
1865 readl(mmio + HOST_CTL); /* flush */
1866 }
1867
1868 return ata_pci_device_suspend(pdev, mesg);
1869 }
1870
1871 static int ahci_pci_device_resume(struct pci_dev *pdev)
1872 {
1873 struct ata_host *host = dev_get_drvdata(&pdev->dev);
1874 int rc;
1875
1876 rc = ata_pci_device_do_resume(pdev);
1877 if (rc)
1878 return rc;
1879
1880 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
1881 rc = ahci_reset_controller(host);
1882 if (rc)
1883 return rc;
1884
1885 ahci_init_controller(host);
1886 }
1887
1888 ata_host_resume(host);
1889
1890 return 0;
1891 }
1892 #endif
1893
1894 static int ahci_port_start(struct ata_port *ap)
1895 {
1896 struct device *dev = ap->host->dev;
1897 struct ahci_port_priv *pp;
1898 void *mem;
1899 dma_addr_t mem_dma;
1900
1901 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
1902 if (!pp)
1903 return -ENOMEM;
1904
1905 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
1906 GFP_KERNEL);
1907 if (!mem)
1908 return -ENOMEM;
1909 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
1910
1911 /*
1912 * First item in chunk of DMA memory: 32-slot command table,
1913 * 32 bytes each in size
1914 */
1915 pp->cmd_slot = mem;
1916 pp->cmd_slot_dma = mem_dma;
1917
1918 mem += AHCI_CMD_SLOT_SZ;
1919 mem_dma += AHCI_CMD_SLOT_SZ;
1920
1921 /*
1922 * Second item: Received-FIS area
1923 */
1924 pp->rx_fis = mem;
1925 pp->rx_fis_dma = mem_dma;
1926
1927 mem += AHCI_RX_FIS_SZ;
1928 mem_dma += AHCI_RX_FIS_SZ;
1929
1930 /*
1931 * Third item: data area for storing a single command
1932 * and its scatter-gather table
1933 */
1934 pp->cmd_tbl = mem;
1935 pp->cmd_tbl_dma = mem_dma;
1936
1937 /*
1938 * Save off initial list of interrupts to be enabled.
1939 * This could be changed later
1940 */
1941 pp->intr_mask = DEF_PORT_IRQ;
1942
1943 ap->private_data = pp;
1944
1945 /* engage engines, captain */
1946 return ahci_port_resume(ap);
1947 }
1948
1949 static void ahci_port_stop(struct ata_port *ap)
1950 {
1951 const char *emsg = NULL;
1952 int rc;
1953
1954 /* de-initialize port */
1955 rc = ahci_deinit_port(ap, &emsg);
1956 if (rc)
1957 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
1958 }
1959
1960 static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
1961 {
1962 int rc;
1963
1964 if (using_dac &&
1965 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
1966 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
1967 if (rc) {
1968 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1969 if (rc) {
1970 dev_printk(KERN_ERR, &pdev->dev,
1971 "64-bit DMA enable failed\n");
1972 return rc;
1973 }
1974 }
1975 } else {
1976 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
1977 if (rc) {
1978 dev_printk(KERN_ERR, &pdev->dev,
1979 "32-bit DMA enable failed\n");
1980 return rc;
1981 }
1982 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
1983 if (rc) {
1984 dev_printk(KERN_ERR, &pdev->dev,
1985 "32-bit consistent DMA enable failed\n");
1986 return rc;
1987 }
1988 }
1989 return 0;
1990 }
1991
1992 static void ahci_print_info(struct ata_host *host)
1993 {
1994 struct ahci_host_priv *hpriv = host->private_data;
1995 struct pci_dev *pdev = to_pci_dev(host->dev);
1996 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1997 u32 vers, cap, impl, speed;
1998 const char *speed_s;
1999 u16 cc;
2000 const char *scc_s;
2001
2002 vers = readl(mmio + HOST_VERSION);
2003 cap = hpriv->cap;
2004 impl = hpriv->port_map;
2005
2006 speed = (cap >> 20) & 0xf;
2007 if (speed == 1)
2008 speed_s = "1.5";
2009 else if (speed == 2)
2010 speed_s = "3";
2011 else
2012 speed_s = "?";
2013
2014 pci_read_config_word(pdev, 0x0a, &cc);
2015 if (cc == PCI_CLASS_STORAGE_IDE)
2016 scc_s = "IDE";
2017 else if (cc == PCI_CLASS_STORAGE_SATA)
2018 scc_s = "SATA";
2019 else if (cc == PCI_CLASS_STORAGE_RAID)
2020 scc_s = "RAID";
2021 else
2022 scc_s = "unknown";
2023
2024 dev_printk(KERN_INFO, &pdev->dev,
2025 "AHCI %02x%02x.%02x%02x "
2026 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2027 ,
2028
2029 (vers >> 24) & 0xff,
2030 (vers >> 16) & 0xff,
2031 (vers >> 8) & 0xff,
2032 vers & 0xff,
2033
2034 ((cap >> 8) & 0x1f) + 1,
2035 (cap & 0x1f) + 1,
2036 speed_s,
2037 impl,
2038 scc_s);
2039
2040 dev_printk(KERN_INFO, &pdev->dev,
2041 "flags: "
2042 "%s%s%s%s%s%s%s"
2043 "%s%s%s%s%s%s%s\n"
2044 ,
2045
2046 cap & (1 << 31) ? "64bit " : "",
2047 cap & (1 << 30) ? "ncq " : "",
2048 cap & (1 << 29) ? "sntf " : "",
2049 cap & (1 << 28) ? "ilck " : "",
2050 cap & (1 << 27) ? "stag " : "",
2051 cap & (1 << 26) ? "pm " : "",
2052 cap & (1 << 25) ? "led " : "",
2053
2054 cap & (1 << 24) ? "clo " : "",
2055 cap & (1 << 19) ? "nz " : "",
2056 cap & (1 << 18) ? "only " : "",
2057 cap & (1 << 17) ? "pmp " : "",
2058 cap & (1 << 15) ? "pio " : "",
2059 cap & (1 << 14) ? "slum " : "",
2060 cap & (1 << 13) ? "part " : ""
2061 );
2062 }
2063
2064 /* On ASUS P5W DH Deluxe, the second port of PCI device 00:1f.2 is
2065 * hardwired to on-board SIMG 4726. The chipset is ICH8 and doesn't
2066 * support PMP and the 4726 either directly exports the device
2067 * attached to the first downstream port or acts as a hardware storage
2068 * controller and emulate a single ATA device (can be RAID 0/1 or some
2069 * other configuration).
2070 *
2071 * When there's no device attached to the first downstream port of the
2072 * 4726, "Config Disk" appears, which is a pseudo ATA device to
2073 * configure the 4726. However, ATA emulation of the device is very
2074 * lame. It doesn't send signature D2H Reg FIS after the initial
2075 * hardreset, pukes on SRST w/ PMP==0 and has bunch of other issues.
2076 *
2077 * The following function works around the problem by always using
2078 * hardreset on the port and not depending on receiving signature FIS
2079 * afterward. If signature FIS isn't received soon, ATA class is
2080 * assumed without follow-up softreset.
2081 */
2082 static void ahci_p5wdh_workaround(struct ata_host *host)
2083 {
2084 static struct dmi_system_id sysids[] = {
2085 {
2086 .ident = "P5W DH Deluxe",
2087 .matches = {
2088 DMI_MATCH(DMI_SYS_VENDOR,
2089 "ASUSTEK COMPUTER INC"),
2090 DMI_MATCH(DMI_PRODUCT_NAME, "P5W DH Deluxe"),
2091 },
2092 },
2093 { }
2094 };
2095 struct pci_dev *pdev = to_pci_dev(host->dev);
2096
2097 if (pdev->bus->number == 0 && pdev->devfn == PCI_DEVFN(0x1f, 2) &&
2098 dmi_check_system(sysids)) {
2099 struct ata_port *ap = host->ports[1];
2100
2101 dev_printk(KERN_INFO, &pdev->dev, "enabling ASUS P5W DH "
2102 "Deluxe on-board SIMG4726 workaround\n");
2103
2104 ap->ops = &ahci_p5wdh_ops;
2105 ap->link.flags |= ATA_LFLAG_NO_SRST | ATA_LFLAG_ASSUME_ATA;
2106 }
2107 }
2108
2109 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
2110 {
2111 static int printed_version;
2112 struct ata_port_info pi = ahci_port_info[ent->driver_data];
2113 const struct ata_port_info *ppi[] = { &pi, NULL };
2114 struct device *dev = &pdev->dev;
2115 struct ahci_host_priv *hpriv;
2116 struct ata_host *host;
2117 int n_ports, i, rc;
2118
2119 VPRINTK("ENTER\n");
2120
2121 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
2122
2123 if (!printed_version++)
2124 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
2125
2126 /* acquire resources */
2127 rc = pcim_enable_device(pdev);
2128 if (rc)
2129 return rc;
2130
2131 /* AHCI controllers often implement SFF compatible interface.
2132 * Grab all PCI BARs just in case.
2133 */
2134 rc = pcim_iomap_regions_request_all(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
2135 if (rc == -EBUSY)
2136 pcim_pin_device(pdev);
2137 if (rc)
2138 return rc;
2139
2140 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
2141 (pdev->device == 0x2652 || pdev->device == 0x2653)) {
2142 u8 map;
2143
2144 /* ICH6s share the same PCI ID for both piix and ahci
2145 * modes. Enabling ahci mode while MAP indicates
2146 * combined mode is a bad idea. Yield to ata_piix.
2147 */
2148 pci_read_config_byte(pdev, ICH_MAP, &map);
2149 if (map & 0x3) {
2150 dev_printk(KERN_INFO, &pdev->dev, "controller is in "
2151 "combined mode, can't enable AHCI mode\n");
2152 return -ENODEV;
2153 }
2154 }
2155
2156 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
2157 if (!hpriv)
2158 return -ENOMEM;
2159 hpriv->flags |= (unsigned long)pi.private_data;
2160
2161 if ((hpriv->flags & AHCI_HFLAG_NO_MSI) || pci_enable_msi(pdev))
2162 pci_intx(pdev, 1);
2163
2164 /* save initial config */
2165 ahci_save_initial_config(pdev, hpriv);
2166
2167 /* prepare host */
2168 if (hpriv->cap & HOST_CAP_NCQ)
2169 pi.flags |= ATA_FLAG_NCQ;
2170
2171 if (hpriv->cap & HOST_CAP_PMP)
2172 pi.flags |= ATA_FLAG_PMP;
2173
2174 /* CAP.NP sometimes indicate the index of the last enabled
2175 * port, at other times, that of the last possible port, so
2176 * determining the maximum port number requires looking at
2177 * both CAP.NP and port_map.
2178 */
2179 n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
2180
2181 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
2182 if (!host)
2183 return -ENOMEM;
2184 host->iomap = pcim_iomap_table(pdev);
2185 host->private_data = hpriv;
2186
2187 for (i = 0; i < host->n_ports; i++) {
2188 struct ata_port *ap = host->ports[i];
2189
2190 ata_port_pbar_desc(ap, AHCI_PCI_BAR, -1, "abar");
2191 ata_port_pbar_desc(ap, AHCI_PCI_BAR,
2192 0x100 + ap->port_no * 0x80, "port");
2193
2194 /* set initial link pm policy */
2195 ap->pm_policy = NOT_AVAILABLE;
2196
2197 /* disabled/not-implemented port */
2198 if (!(hpriv->port_map & (1 << i)))
2199 ap->ops = &ata_dummy_port_ops;
2200 }
2201
2202 /* apply workaround for ASUS P5W DH Deluxe mainboard */
2203 ahci_p5wdh_workaround(host);
2204
2205 /* initialize adapter */
2206 rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
2207 if (rc)
2208 return rc;
2209
2210 rc = ahci_reset_controller(host);
2211 if (rc)
2212 return rc;
2213
2214 ahci_init_controller(host);
2215 ahci_print_info(host);
2216
2217 pci_set_master(pdev);
2218 return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
2219 &ahci_sht);
2220 }
2221
2222 static int __init ahci_init(void)
2223 {
2224 return pci_register_driver(&ahci_pci_driver);
2225 }
2226
2227 static void __exit ahci_exit(void)
2228 {
2229 pci_unregister_driver(&ahci_pci_driver);
2230 }
2231
2232
2233 MODULE_AUTHOR("Jeff Garzik");
2234 MODULE_DESCRIPTION("AHCI SATA low-level driver");
2235 MODULE_LICENSE("GPL");
2236 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
2237 MODULE_VERSION(DRV_VERSION);
2238
2239 module_init(ahci_init);
2240 module_exit(ahci_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree