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mac80211: fix race in TX aggregation
[linux-2.6/mini2440.git] / drivers / ata / ahci.c
bloba603bbf9b1b706caf37a15b94eb8b6ecb4a3e8dc
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 /* Enclosure Management Control */
53 #define EM_CTRL_MSG_TYPE 0x000f0000
54
55 /* Enclosure Management LED Message Type */
56 #define EM_MSG_LED_HBA_PORT 0x0000000f
57 #define EM_MSG_LED_PMP_SLOT 0x0000ff00
58 #define EM_MSG_LED_VALUE 0xffff0000
59 #define EM_MSG_LED_VALUE_ACTIVITY 0x00070000
60 #define EM_MSG_LED_VALUE_OFF 0xfff80000
61 #define EM_MSG_LED_VALUE_ON 0x00010000
62
63 static int ahci_skip_host_reset;
64 static int ahci_ignore_sss;
65
66 module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444);
67 MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)");
68
69 module_param_named(ignore_sss, ahci_ignore_sss, int, 0444);
70 MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)");
71
72 static int ahci_enable_alpm(struct ata_port *ap,
73 enum link_pm policy);
74 static void ahci_disable_alpm(struct ata_port *ap);
75 static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
76 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
77 size_t size);
78 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
79 ssize_t size);
80 #define MAX_SLOTS 8
81
82 enum {
83 AHCI_PCI_BAR = 5,
84 AHCI_MAX_PORTS = 32,
85 AHCI_MAX_SG = 168, /* hardware max is 64K */
86 AHCI_DMA_BOUNDARY = 0xffffffff,
87 AHCI_MAX_CMDS = 32,
88 AHCI_CMD_SZ = 32,
89 AHCI_CMD_SLOT_SZ = AHCI_MAX_CMDS * AHCI_CMD_SZ,
90 AHCI_RX_FIS_SZ = 256,
91 AHCI_CMD_TBL_CDB = 0x40,
92 AHCI_CMD_TBL_HDR_SZ = 0x80,
93 AHCI_CMD_TBL_SZ = AHCI_CMD_TBL_HDR_SZ + (AHCI_MAX_SG * 16),
94 AHCI_CMD_TBL_AR_SZ = AHCI_CMD_TBL_SZ * AHCI_MAX_CMDS,
95 AHCI_PORT_PRIV_DMA_SZ = AHCI_CMD_SLOT_SZ + AHCI_CMD_TBL_AR_SZ +
96 AHCI_RX_FIS_SZ,
97 AHCI_IRQ_ON_SG = (1 << 31),
98 AHCI_CMD_ATAPI = (1 << 5),
99 AHCI_CMD_WRITE = (1 << 6),
100 AHCI_CMD_PREFETCH = (1 << 7),
101 AHCI_CMD_RESET = (1 << 8),
102 AHCI_CMD_CLR_BUSY = (1 << 10),
103
104 RX_FIS_D2H_REG = 0x40, /* offset of D2H Register FIS data */
105 RX_FIS_SDB = 0x58, /* offset of SDB FIS data */
106 RX_FIS_UNK = 0x60, /* offset of Unknown FIS data */
107
108 board_ahci = 0,
109 board_ahci_vt8251 = 1,
110 board_ahci_ign_iferr = 2,
111 board_ahci_sb600 = 3,
112 board_ahci_mv = 4,
113 board_ahci_sb700 = 5, /* for SB700 and SB800 */
114 board_ahci_mcp65 = 6,
115 board_ahci_nopmp = 7,
116
117 /* global controller registers */
118 HOST_CAP = 0x00, /* host capabilities */
119 HOST_CTL = 0x04, /* global host control */
120 HOST_IRQ_STAT = 0x08, /* interrupt status */
121 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
122 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
123 HOST_EM_LOC = 0x1c, /* Enclosure Management location */
124 HOST_EM_CTL = 0x20, /* Enclosure Management Control */
125
126 /* HOST_CTL bits */
127 HOST_RESET = (1 << 0), /* reset controller; self-clear */
128 HOST_IRQ_EN = (1 << 1), /* global IRQ enable */
129 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
130
131 /* HOST_CAP bits */
132 HOST_CAP_EMS = (1 << 6), /* Enclosure Management support */
133 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
134 HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
135 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
136 HOST_CAP_ALPM = (1 << 26), /* Aggressive Link PM support */
137 HOST_CAP_SSS = (1 << 27), /* Staggered Spin-up */
138 HOST_CAP_SNTF = (1 << 29), /* SNotification register */
139 HOST_CAP_NCQ = (1 << 30), /* Native Command Queueing */
140 HOST_CAP_64 = (1 << 31), /* PCI DAC (64-bit DMA) support */
141
142 /* registers for each SATA port */
143 PORT_LST_ADDR = 0x00, /* command list DMA addr */
144 PORT_LST_ADDR_HI = 0x04, /* command list DMA addr hi */
145 PORT_FIS_ADDR = 0x08, /* FIS rx buf addr */
146 PORT_FIS_ADDR_HI = 0x0c, /* FIS rx buf addr hi */
147 PORT_IRQ_STAT = 0x10, /* interrupt status */
148 PORT_IRQ_MASK = 0x14, /* interrupt enable/disable mask */
149 PORT_CMD = 0x18, /* port command */
150 PORT_TFDATA = 0x20, /* taskfile data */
151 PORT_SIG = 0x24, /* device TF signature */
152 PORT_CMD_ISSUE = 0x38, /* command issue */
153 PORT_SCR_STAT = 0x28, /* SATA phy register: SStatus */
154 PORT_SCR_CTL = 0x2c, /* SATA phy register: SControl */
155 PORT_SCR_ERR = 0x30, /* SATA phy register: SError */
156 PORT_SCR_ACT = 0x34, /* SATA phy register: SActive */
157 PORT_SCR_NTF = 0x3c, /* SATA phy register: SNotification */
158
159 /* PORT_IRQ_{STAT,MASK} bits */
160 PORT_IRQ_COLD_PRES = (1 << 31), /* cold presence detect */
161 PORT_IRQ_TF_ERR = (1 << 30), /* task file error */
162 PORT_IRQ_HBUS_ERR = (1 << 29), /* host bus fatal error */
163 PORT_IRQ_HBUS_DATA_ERR = (1 << 28), /* host bus data error */
164 PORT_IRQ_IF_ERR = (1 << 27), /* interface fatal error */
165 PORT_IRQ_IF_NONFATAL = (1 << 26), /* interface non-fatal error */
166 PORT_IRQ_OVERFLOW = (1 << 24), /* xfer exhausted available S/G */
167 PORT_IRQ_BAD_PMP = (1 << 23), /* incorrect port multiplier */
168
169 PORT_IRQ_PHYRDY = (1 << 22), /* PhyRdy changed */
170 PORT_IRQ_DEV_ILCK = (1 << 7), /* device interlock */
171 PORT_IRQ_CONNECT = (1 << 6), /* port connect change status */
172 PORT_IRQ_SG_DONE = (1 << 5), /* descriptor processed */
173 PORT_IRQ_UNK_FIS = (1 << 4), /* unknown FIS rx'd */
174 PORT_IRQ_SDB_FIS = (1 << 3), /* Set Device Bits FIS rx'd */
175 PORT_IRQ_DMAS_FIS = (1 << 2), /* DMA Setup FIS rx'd */
176 PORT_IRQ_PIOS_FIS = (1 << 1), /* PIO Setup FIS rx'd */
177 PORT_IRQ_D2H_REG_FIS = (1 << 0), /* D2H Register FIS rx'd */
178
179 PORT_IRQ_FREEZE = PORT_IRQ_HBUS_ERR |
180 PORT_IRQ_IF_ERR |
181 PORT_IRQ_CONNECT |
182 PORT_IRQ_PHYRDY |
183 PORT_IRQ_UNK_FIS |
184 PORT_IRQ_BAD_PMP,
185 PORT_IRQ_ERROR = PORT_IRQ_FREEZE |
186 PORT_IRQ_TF_ERR |
187 PORT_IRQ_HBUS_DATA_ERR,
188 DEF_PORT_IRQ = PORT_IRQ_ERROR | PORT_IRQ_SG_DONE |
189 PORT_IRQ_SDB_FIS | PORT_IRQ_DMAS_FIS |
190 PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS,
191
192 /* PORT_CMD bits */
193 PORT_CMD_ASP = (1 << 27), /* Aggressive Slumber/Partial */
194 PORT_CMD_ALPE = (1 << 26), /* Aggressive Link PM enable */
195 PORT_CMD_ATAPI = (1 << 24), /* Device is ATAPI */
196 PORT_CMD_PMP = (1 << 17), /* PMP attached */
197 PORT_CMD_LIST_ON = (1 << 15), /* cmd list DMA engine running */
198 PORT_CMD_FIS_ON = (1 << 14), /* FIS DMA engine running */
199 PORT_CMD_FIS_RX = (1 << 4), /* Enable FIS receive DMA engine */
200 PORT_CMD_CLO = (1 << 3), /* Command list override */
201 PORT_CMD_POWER_ON = (1 << 2), /* Power up device */
202 PORT_CMD_SPIN_UP = (1 << 1), /* Spin up device */
203 PORT_CMD_START = (1 << 0), /* Enable port DMA engine */
204
205 PORT_CMD_ICC_MASK = (0xf << 28), /* i/f ICC state mask */
206 PORT_CMD_ICC_ACTIVE = (0x1 << 28), /* Put i/f in active state */
207 PORT_CMD_ICC_PARTIAL = (0x2 << 28), /* Put i/f in partial state */
208 PORT_CMD_ICC_SLUMBER = (0x6 << 28), /* Put i/f in slumber state */
209
210 /* hpriv->flags bits */
211 AHCI_HFLAG_NO_NCQ = (1 << 0),
212 AHCI_HFLAG_IGN_IRQ_IF_ERR = (1 << 1), /* ignore IRQ_IF_ERR */
213 AHCI_HFLAG_IGN_SERR_INTERNAL = (1 << 2), /* ignore SERR_INTERNAL */
214 AHCI_HFLAG_32BIT_ONLY = (1 << 3), /* force 32bit */
215 AHCI_HFLAG_MV_PATA = (1 << 4), /* PATA port */
216 AHCI_HFLAG_NO_MSI = (1 << 5), /* no PCI MSI */
217 AHCI_HFLAG_NO_PMP = (1 << 6), /* no PMP */
218 AHCI_HFLAG_NO_HOTPLUG = (1 << 7), /* ignore PxSERR.DIAG.N */
219 AHCI_HFLAG_SECT255 = (1 << 8), /* max 255 sectors */
220 AHCI_HFLAG_YES_NCQ = (1 << 9), /* force NCQ cap on */
221
222 /* ap->flags bits */
223
224 AHCI_FLAG_COMMON = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
225 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA |
226 ATA_FLAG_ACPI_SATA | ATA_FLAG_AN |
227 ATA_FLAG_IPM,
228
229 ICH_MAP = 0x90, /* ICH MAP register */
230
231 /* em_ctl bits */
232 EM_CTL_RST = (1 << 9), /* Reset */
233 EM_CTL_TM = (1 << 8), /* Transmit Message */
234 EM_CTL_ALHD = (1 << 26), /* Activity LED */
235 };
236
237 struct ahci_cmd_hdr {
238 __le32 opts;
239 __le32 status;
240 __le32 tbl_addr;
241 __le32 tbl_addr_hi;
242 __le32 reserved[4];
243 };
244
245 struct ahci_sg {
246 __le32 addr;
247 __le32 addr_hi;
248 __le32 reserved;
249 __le32 flags_size;
250 };
251
252 struct ahci_em_priv {
253 enum sw_activity blink_policy;
254 struct timer_list timer;
255 unsigned long saved_activity;
256 unsigned long activity;
257 unsigned long led_state;
258 };
259
260 struct ahci_host_priv {
261 unsigned int flags; /* AHCI_HFLAG_* */
262 u32 cap; /* cap to use */
263 u32 port_map; /* port map to use */
264 u32 saved_cap; /* saved initial cap */
265 u32 saved_port_map; /* saved initial port_map */
266 u32 em_loc; /* enclosure management location */
267 };
268
269 struct ahci_port_priv {
270 struct ata_link *active_link;
271 struct ahci_cmd_hdr *cmd_slot;
272 dma_addr_t cmd_slot_dma;
273 void *cmd_tbl;
274 dma_addr_t cmd_tbl_dma;
275 void *rx_fis;
276 dma_addr_t rx_fis_dma;
277 /* for NCQ spurious interrupt analysis */
278 unsigned int ncq_saw_d2h:1;
279 unsigned int ncq_saw_dmas:1;
280 unsigned int ncq_saw_sdb:1;
281 u32 intr_mask; /* interrupts to enable */
282 struct ahci_em_priv em_priv[MAX_SLOTS];/* enclosure management info
283 * per PM slot */
284 };
285
286 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val);
287 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val);
288 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent);
289 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc);
290 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc);
291 static int ahci_port_start(struct ata_port *ap);
292 static void ahci_port_stop(struct ata_port *ap);
293 static void ahci_qc_prep(struct ata_queued_cmd *qc);
294 static void ahci_freeze(struct ata_port *ap);
295 static void ahci_thaw(struct ata_port *ap);
296 static void ahci_pmp_attach(struct ata_port *ap);
297 static void ahci_pmp_detach(struct ata_port *ap);
298 static int ahci_softreset(struct ata_link *link, unsigned int *class,
299 unsigned long deadline);
300 static int ahci_sb600_softreset(struct ata_link *link, unsigned int *class,
301 unsigned long deadline);
302 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
303 unsigned long deadline);
304 static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
305 unsigned long deadline);
306 static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
307 unsigned long deadline);
308 static void ahci_postreset(struct ata_link *link, unsigned int *class);
309 static void ahci_error_handler(struct ata_port *ap);
310 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc);
311 static int ahci_port_resume(struct ata_port *ap);
312 static void ahci_dev_config(struct ata_device *dev);
313 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl);
314 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
315 u32 opts);
316 #ifdef CONFIG_PM
317 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
318 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
319 static int ahci_pci_device_resume(struct pci_dev *pdev);
320 #endif
321 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
322 static ssize_t ahci_activity_store(struct ata_device *dev,
323 enum sw_activity val);
324 static void ahci_init_sw_activity(struct ata_link *link);
325
326 static struct device_attribute *ahci_shost_attrs[] = {
327 &dev_attr_link_power_management_policy,
328 &dev_attr_em_message_type,
329 &dev_attr_em_message,
330 NULL
331 };
332
333 static struct device_attribute *ahci_sdev_attrs[] = {
334 &dev_attr_sw_activity,
335 &dev_attr_unload_heads,
336 NULL
337 };
338
339 static struct scsi_host_template ahci_sht = {
340 ATA_NCQ_SHT(DRV_NAME),
341 .can_queue = AHCI_MAX_CMDS - 1,
342 .sg_tablesize = AHCI_MAX_SG,
343 .dma_boundary = AHCI_DMA_BOUNDARY,
344 .shost_attrs = ahci_shost_attrs,
345 .sdev_attrs = ahci_sdev_attrs,
346 };
347
348 static struct ata_port_operations ahci_ops = {
349 .inherits = &sata_pmp_port_ops,
350
351 .qc_defer = sata_pmp_qc_defer_cmd_switch,
352 .qc_prep = ahci_qc_prep,
353 .qc_issue = ahci_qc_issue,
354 .qc_fill_rtf = ahci_qc_fill_rtf,
355
356 .freeze = ahci_freeze,
357 .thaw = ahci_thaw,
358 .softreset = ahci_softreset,
359 .hardreset = ahci_hardreset,
360 .postreset = ahci_postreset,
361 .pmp_softreset = ahci_softreset,
362 .error_handler = ahci_error_handler,
363 .post_internal_cmd = ahci_post_internal_cmd,
364 .dev_config = ahci_dev_config,
365
366 .scr_read = ahci_scr_read,
367 .scr_write = ahci_scr_write,
368 .pmp_attach = ahci_pmp_attach,
369 .pmp_detach = ahci_pmp_detach,
370
371 .enable_pm = ahci_enable_alpm,
372 .disable_pm = ahci_disable_alpm,
373 .em_show = ahci_led_show,
374 .em_store = ahci_led_store,
375 .sw_activity_show = ahci_activity_show,
376 .sw_activity_store = ahci_activity_store,
377 #ifdef CONFIG_PM
378 .port_suspend = ahci_port_suspend,
379 .port_resume = ahci_port_resume,
380 #endif
381 .port_start = ahci_port_start,
382 .port_stop = ahci_port_stop,
383 };
384
385 static struct ata_port_operations ahci_vt8251_ops = {
386 .inherits = &ahci_ops,
387 .hardreset = ahci_vt8251_hardreset,
388 };
389
390 static struct ata_port_operations ahci_p5wdh_ops = {
391 .inherits = &ahci_ops,
392 .hardreset = ahci_p5wdh_hardreset,
393 };
394
395 static struct ata_port_operations ahci_sb600_ops = {
396 .inherits = &ahci_ops,
397 .softreset = ahci_sb600_softreset,
398 .pmp_softreset = ahci_sb600_softreset,
399 };
400
401 #define AHCI_HFLAGS(flags) .private_data = (void *)(flags)
402
403 static const struct ata_port_info ahci_port_info[] = {
404 /* board_ahci */
405 {
406 .flags = AHCI_FLAG_COMMON,
407 .pio_mask = 0x1f, /* pio0-4 */
408 .udma_mask = ATA_UDMA6,
409 .port_ops = &ahci_ops,
410 },
411 /* board_ahci_vt8251 */
412 {
413 AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_PMP),
414 .flags = AHCI_FLAG_COMMON,
415 .pio_mask = 0x1f, /* pio0-4 */
416 .udma_mask = ATA_UDMA6,
417 .port_ops = &ahci_vt8251_ops,
418 },
419 /* board_ahci_ign_iferr */
420 {
421 AHCI_HFLAGS (AHCI_HFLAG_IGN_IRQ_IF_ERR),
422 .flags = AHCI_FLAG_COMMON,
423 .pio_mask = 0x1f, /* pio0-4 */
424 .udma_mask = ATA_UDMA6,
425 .port_ops = &ahci_ops,
426 },
427 /* board_ahci_sb600 */
428 {
429 AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL |
430 AHCI_HFLAG_32BIT_ONLY | AHCI_HFLAG_NO_MSI |
431 AHCI_HFLAG_SECT255),
432 .flags = AHCI_FLAG_COMMON,
433 .pio_mask = 0x1f, /* pio0-4 */
434 .udma_mask = ATA_UDMA6,
435 .port_ops = &ahci_sb600_ops,
436 },
437 /* board_ahci_mv */
438 {
439 AHCI_HFLAGS (AHCI_HFLAG_NO_NCQ | AHCI_HFLAG_NO_MSI |
440 AHCI_HFLAG_MV_PATA | AHCI_HFLAG_NO_PMP),
441 .flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
442 ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
443 .pio_mask = 0x1f, /* pio0-4 */
444 .udma_mask = ATA_UDMA6,
445 .port_ops = &ahci_ops,
446 },
447 /* board_ahci_sb700, for SB700 and SB800 */
448 {
449 AHCI_HFLAGS (AHCI_HFLAG_IGN_SERR_INTERNAL),
450 .flags = AHCI_FLAG_COMMON,
451 .pio_mask = 0x1f, /* pio0-4 */
452 .udma_mask = ATA_UDMA6,
453 .port_ops = &ahci_sb600_ops,
454 },
455 /* board_ahci_mcp65 */
456 {
457 AHCI_HFLAGS (AHCI_HFLAG_YES_NCQ),
458 .flags = AHCI_FLAG_COMMON,
459 .pio_mask = 0x1f, /* pio0-4 */
460 .udma_mask = ATA_UDMA6,
461 .port_ops = &ahci_ops,
462 },
463 /* board_ahci_nopmp */
464 {
465 AHCI_HFLAGS (AHCI_HFLAG_NO_PMP),
466 .flags = AHCI_FLAG_COMMON,
467 .pio_mask = 0x1f, /* pio0-4 */
468 .udma_mask = ATA_UDMA6,
469 .port_ops = &ahci_ops,
470 },
471 };
472
473 static const struct pci_device_id ahci_pci_tbl[] = {
474 /* Intel */
475 { PCI_VDEVICE(INTEL, 0x2652), board_ahci }, /* ICH6 */
476 { PCI_VDEVICE(INTEL, 0x2653), board_ahci }, /* ICH6M */
477 { PCI_VDEVICE(INTEL, 0x27c1), board_ahci }, /* ICH7 */
478 { PCI_VDEVICE(INTEL, 0x27c5), board_ahci }, /* ICH7M */
479 { PCI_VDEVICE(INTEL, 0x27c3), board_ahci }, /* ICH7R */
480 { PCI_VDEVICE(AL, 0x5288), board_ahci_ign_iferr }, /* ULi M5288 */
481 { PCI_VDEVICE(INTEL, 0x2681), board_ahci }, /* ESB2 */
482 { PCI_VDEVICE(INTEL, 0x2682), board_ahci }, /* ESB2 */
483 { PCI_VDEVICE(INTEL, 0x2683), board_ahci }, /* ESB2 */
484 { PCI_VDEVICE(INTEL, 0x27c6), board_ahci }, /* ICH7-M DH */
485 { PCI_VDEVICE(INTEL, 0x2821), board_ahci }, /* ICH8 */
486 { PCI_VDEVICE(INTEL, 0x2822), board_ahci }, /* ICH8 */
487 { PCI_VDEVICE(INTEL, 0x2824), board_ahci }, /* ICH8 */
488 { PCI_VDEVICE(INTEL, 0x2829), board_ahci }, /* ICH8M */
489 { PCI_VDEVICE(INTEL, 0x282a), board_ahci }, /* ICH8M */
490 { PCI_VDEVICE(INTEL, 0x2922), board_ahci }, /* ICH9 */
491 { PCI_VDEVICE(INTEL, 0x2923), board_ahci }, /* ICH9 */
492 { PCI_VDEVICE(INTEL, 0x2924), board_ahci }, /* ICH9 */
493 { PCI_VDEVICE(INTEL, 0x2925), board_ahci }, /* ICH9 */
494 { PCI_VDEVICE(INTEL, 0x2927), board_ahci }, /* ICH9 */
495 { PCI_VDEVICE(INTEL, 0x2929), board_ahci }, /* ICH9M */
496 { PCI_VDEVICE(INTEL, 0x292a), board_ahci }, /* ICH9M */
497 { PCI_VDEVICE(INTEL, 0x292b), board_ahci }, /* ICH9M */
498 { PCI_VDEVICE(INTEL, 0x292c), board_ahci }, /* ICH9M */
499 { PCI_VDEVICE(INTEL, 0x292f), board_ahci }, /* ICH9M */
500 { PCI_VDEVICE(INTEL, 0x294d), board_ahci }, /* ICH9 */
501 { PCI_VDEVICE(INTEL, 0x294e), board_ahci }, /* ICH9M */
502 { PCI_VDEVICE(INTEL, 0x502a), board_ahci }, /* Tolapai */
503 { PCI_VDEVICE(INTEL, 0x502b), board_ahci }, /* Tolapai */
504 { PCI_VDEVICE(INTEL, 0x3a05), board_ahci }, /* ICH10 */
505 { PCI_VDEVICE(INTEL, 0x3a25), board_ahci }, /* ICH10 */
506 { PCI_VDEVICE(INTEL, 0x3b24), board_ahci }, /* PCH RAID */
507 { PCI_VDEVICE(INTEL, 0x3b25), board_ahci }, /* PCH RAID */
508 { PCI_VDEVICE(INTEL, 0x3b2b), board_ahci }, /* PCH RAID */
509 { PCI_VDEVICE(INTEL, 0x3b2c), board_ahci }, /* PCH RAID */
510
511 /* JMicron 360/1/3/5/6, match class to avoid IDE function */
512 { PCI_VENDOR_ID_JMICRON, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
513 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci_ign_iferr },
514
515 /* ATI */
516 { PCI_VDEVICE(ATI, 0x4380), board_ahci_sb600 }, /* ATI SB600 */
517 { PCI_VDEVICE(ATI, 0x4390), board_ahci_sb700 }, /* ATI SB700/800 */
518 { PCI_VDEVICE(ATI, 0x4391), board_ahci_sb700 }, /* ATI SB700/800 */
519 { PCI_VDEVICE(ATI, 0x4392), board_ahci_sb700 }, /* ATI SB700/800 */
520 { PCI_VDEVICE(ATI, 0x4393), board_ahci_sb700 }, /* ATI SB700/800 */
521 { PCI_VDEVICE(ATI, 0x4394), board_ahci_sb700 }, /* ATI SB700/800 */
522 { PCI_VDEVICE(ATI, 0x4395), board_ahci_sb700 }, /* ATI SB700/800 */
523
524 /* VIA */
525 { PCI_VDEVICE(VIA, 0x3349), board_ahci_vt8251 }, /* VIA VT8251 */
526 { PCI_VDEVICE(VIA, 0x6287), board_ahci_vt8251 }, /* VIA VT8251 */
527
528 /* NVIDIA */
529 { PCI_VDEVICE(NVIDIA, 0x044c), board_ahci_mcp65 }, /* MCP65 */
530 { PCI_VDEVICE(NVIDIA, 0x044d), board_ahci_mcp65 }, /* MCP65 */
531 { PCI_VDEVICE(NVIDIA, 0x044e), board_ahci_mcp65 }, /* MCP65 */
532 { PCI_VDEVICE(NVIDIA, 0x044f), board_ahci_mcp65 }, /* MCP65 */
533 { PCI_VDEVICE(NVIDIA, 0x045c), board_ahci_mcp65 }, /* MCP65 */
534 { PCI_VDEVICE(NVIDIA, 0x045d), board_ahci_mcp65 }, /* MCP65 */
535 { PCI_VDEVICE(NVIDIA, 0x045e), board_ahci_mcp65 }, /* MCP65 */
536 { PCI_VDEVICE(NVIDIA, 0x045f), board_ahci_mcp65 }, /* MCP65 */
537 { PCI_VDEVICE(NVIDIA, 0x0550), board_ahci }, /* MCP67 */
538 { PCI_VDEVICE(NVIDIA, 0x0551), board_ahci }, /* MCP67 */
539 { PCI_VDEVICE(NVIDIA, 0x0552), board_ahci }, /* MCP67 */
540 { PCI_VDEVICE(NVIDIA, 0x0553), board_ahci }, /* MCP67 */
541 { PCI_VDEVICE(NVIDIA, 0x0554), board_ahci }, /* MCP67 */
542 { PCI_VDEVICE(NVIDIA, 0x0555), board_ahci }, /* MCP67 */
543 { PCI_VDEVICE(NVIDIA, 0x0556), board_ahci }, /* MCP67 */
544 { PCI_VDEVICE(NVIDIA, 0x0557), board_ahci }, /* MCP67 */
545 { PCI_VDEVICE(NVIDIA, 0x0558), board_ahci }, /* MCP67 */
546 { PCI_VDEVICE(NVIDIA, 0x0559), board_ahci }, /* MCP67 */
547 { PCI_VDEVICE(NVIDIA, 0x055a), board_ahci }, /* MCP67 */
548 { PCI_VDEVICE(NVIDIA, 0x055b), board_ahci }, /* MCP67 */
549 { PCI_VDEVICE(NVIDIA, 0x07f0), board_ahci }, /* MCP73 */
550 { PCI_VDEVICE(NVIDIA, 0x07f1), board_ahci }, /* MCP73 */
551 { PCI_VDEVICE(NVIDIA, 0x07f2), board_ahci }, /* MCP73 */
552 { PCI_VDEVICE(NVIDIA, 0x07f3), board_ahci }, /* MCP73 */
553 { PCI_VDEVICE(NVIDIA, 0x07f4), board_ahci }, /* MCP73 */
554 { PCI_VDEVICE(NVIDIA, 0x07f5), board_ahci }, /* MCP73 */
555 { PCI_VDEVICE(NVIDIA, 0x07f6), board_ahci }, /* MCP73 */
556 { PCI_VDEVICE(NVIDIA, 0x07f7), board_ahci }, /* MCP73 */
557 { PCI_VDEVICE(NVIDIA, 0x07f8), board_ahci }, /* MCP73 */
558 { PCI_VDEVICE(NVIDIA, 0x07f9), board_ahci }, /* MCP73 */
559 { PCI_VDEVICE(NVIDIA, 0x07fa), board_ahci }, /* MCP73 */
560 { PCI_VDEVICE(NVIDIA, 0x07fb), board_ahci }, /* MCP73 */
561 { PCI_VDEVICE(NVIDIA, 0x0ad0), board_ahci }, /* MCP77 */
562 { PCI_VDEVICE(NVIDIA, 0x0ad1), board_ahci }, /* MCP77 */
563 { PCI_VDEVICE(NVIDIA, 0x0ad2), board_ahci }, /* MCP77 */
564 { PCI_VDEVICE(NVIDIA, 0x0ad3), board_ahci }, /* MCP77 */
565 { PCI_VDEVICE(NVIDIA, 0x0ad4), board_ahci }, /* MCP77 */
566 { PCI_VDEVICE(NVIDIA, 0x0ad5), board_ahci }, /* MCP77 */
567 { PCI_VDEVICE(NVIDIA, 0x0ad6), board_ahci }, /* MCP77 */
568 { PCI_VDEVICE(NVIDIA, 0x0ad7), board_ahci }, /* MCP77 */
569 { PCI_VDEVICE(NVIDIA, 0x0ad8), board_ahci }, /* MCP77 */
570 { PCI_VDEVICE(NVIDIA, 0x0ad9), board_ahci }, /* MCP77 */
571 { PCI_VDEVICE(NVIDIA, 0x0ada), board_ahci }, /* MCP77 */
572 { PCI_VDEVICE(NVIDIA, 0x0adb), board_ahci }, /* MCP77 */
573 { PCI_VDEVICE(NVIDIA, 0x0ab4), board_ahci }, /* MCP79 */
574 { PCI_VDEVICE(NVIDIA, 0x0ab5), board_ahci }, /* MCP79 */
575 { PCI_VDEVICE(NVIDIA, 0x0ab6), board_ahci }, /* MCP79 */
576 { PCI_VDEVICE(NVIDIA, 0x0ab7), board_ahci }, /* MCP79 */
577 { PCI_VDEVICE(NVIDIA, 0x0ab8), board_ahci }, /* MCP79 */
578 { PCI_VDEVICE(NVIDIA, 0x0ab9), board_ahci }, /* MCP79 */
579 { PCI_VDEVICE(NVIDIA, 0x0aba), board_ahci }, /* MCP79 */
580 { PCI_VDEVICE(NVIDIA, 0x0abb), board_ahci }, /* MCP79 */
581 { PCI_VDEVICE(NVIDIA, 0x0abc), board_ahci }, /* MCP79 */
582 { PCI_VDEVICE(NVIDIA, 0x0abd), board_ahci }, /* MCP79 */
583 { PCI_VDEVICE(NVIDIA, 0x0abe), board_ahci }, /* MCP79 */
584 { PCI_VDEVICE(NVIDIA, 0x0abf), board_ahci }, /* MCP79 */
585 { PCI_VDEVICE(NVIDIA, 0x0bc8), board_ahci }, /* MCP7B */
586 { PCI_VDEVICE(NVIDIA, 0x0bc9), board_ahci }, /* MCP7B */
587 { PCI_VDEVICE(NVIDIA, 0x0bca), board_ahci }, /* MCP7B */
588 { PCI_VDEVICE(NVIDIA, 0x0bcb), board_ahci }, /* MCP7B */
589 { PCI_VDEVICE(NVIDIA, 0x0bcc), board_ahci }, /* MCP7B */
590 { PCI_VDEVICE(NVIDIA, 0x0bcd), board_ahci }, /* MCP7B */
591 { PCI_VDEVICE(NVIDIA, 0x0bce), board_ahci }, /* MCP7B */
592 { PCI_VDEVICE(NVIDIA, 0x0bcf), board_ahci }, /* MCP7B */
593 { PCI_VDEVICE(NVIDIA, 0x0bc4), board_ahci }, /* MCP7B */
594 { PCI_VDEVICE(NVIDIA, 0x0bc5), board_ahci }, /* MCP7B */
595 { PCI_VDEVICE(NVIDIA, 0x0bc6), board_ahci }, /* MCP7B */
596 { PCI_VDEVICE(NVIDIA, 0x0bc7), board_ahci }, /* MCP7B */
597
598 /* SiS */
599 { PCI_VDEVICE(SI, 0x1184), board_ahci }, /* SiS 966 */
600 { PCI_VDEVICE(SI, 0x1185), board_ahci }, /* SiS 968 */
601 { PCI_VDEVICE(SI, 0x0186), board_ahci }, /* SiS 968 */
602
603 /* Marvell */
604 { PCI_VDEVICE(MARVELL, 0x6145), board_ahci_mv }, /* 6145 */
605 { PCI_VDEVICE(MARVELL, 0x6121), board_ahci_mv }, /* 6121 */
606
607 /* Promise */
608 { PCI_VDEVICE(PROMISE, 0x3f20), board_ahci }, /* PDC42819 */
609
610 /* Generic, PCI class code for AHCI */
611 { PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
612 PCI_CLASS_STORAGE_SATA_AHCI, 0xffffff, board_ahci },
613
614 { } /* terminate list */
615 };
616
617
618 static struct pci_driver ahci_pci_driver = {
619 .name = DRV_NAME,
620 .id_table = ahci_pci_tbl,
621 .probe = ahci_init_one,
622 .remove = ata_pci_remove_one,
623 #ifdef CONFIG_PM
624 .suspend = ahci_pci_device_suspend,
625 .resume = ahci_pci_device_resume,
626 #endif
627 };
628
629 static int ahci_em_messages = 1;
630 module_param(ahci_em_messages, int, 0444);
631 /* add other LED protocol types when they become supported */
632 MODULE_PARM_DESC(ahci_em_messages,
633 "Set AHCI Enclosure Management Message type (0 = disabled, 1 = LED");
634
635 #if defined(CONFIG_PATA_MARVELL) || defined(CONFIG_PATA_MARVELL_MODULE)
636 static int marvell_enable;
637 #else
638 static int marvell_enable = 1;
639 #endif
640 module_param(marvell_enable, int, 0644);
641 MODULE_PARM_DESC(marvell_enable, "Marvell SATA via AHCI (1 = enabled)");
642
643
644 static inline int ahci_nr_ports(u32 cap)
645 {
646 return (cap & 0x1f) + 1;
647 }
648
649 static inline void __iomem *__ahci_port_base(struct ata_host *host,
650 unsigned int port_no)
651 {
652 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
653
654 return mmio + 0x100 + (port_no * 0x80);
655 }
656
657 static inline void __iomem *ahci_port_base(struct ata_port *ap)
658 {
659 return __ahci_port_base(ap->host, ap->port_no);
660 }
661
662 static void ahci_enable_ahci(void __iomem *mmio)
663 {
664 int i;
665 u32 tmp;
666
667 /* turn on AHCI_EN */
668 tmp = readl(mmio + HOST_CTL);
669 if (tmp & HOST_AHCI_EN)
670 return;
671
672 /* Some controllers need AHCI_EN to be written multiple times.
673 * Try a few times before giving up.
674 */
675 for (i = 0; i < 5; i++) {
676 tmp |= HOST_AHCI_EN;
677 writel(tmp, mmio + HOST_CTL);
678 tmp = readl(mmio + HOST_CTL); /* flush && sanity check */
679 if (tmp & HOST_AHCI_EN)
680 return;
681 msleep(10);
682 }
683
684 WARN_ON(1);
685 }
686
687 /**
688 * ahci_save_initial_config - Save and fixup initial config values
689 * @pdev: target PCI device
690 * @hpriv: host private area to store config values
691 *
692 * Some registers containing configuration info might be setup by
693 * BIOS and might be cleared on reset. This function saves the
694 * initial values of those registers into @hpriv such that they
695 * can be restored after controller reset.
696 *
697 * If inconsistent, config values are fixed up by this function.
698 *
699 * LOCKING:
700 * None.
701 */
702 static void ahci_save_initial_config(struct pci_dev *pdev,
703 struct ahci_host_priv *hpriv)
704 {
705 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
706 u32 cap, port_map;
707 int i;
708 int mv;
709
710 /* make sure AHCI mode is enabled before accessing CAP */
711 ahci_enable_ahci(mmio);
712
713 /* Values prefixed with saved_ are written back to host after
714 * reset. Values without are used for driver operation.
715 */
716 hpriv->saved_cap = cap = readl(mmio + HOST_CAP);
717 hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL);
718
719 /* some chips have errata preventing 64bit use */
720 if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) {
721 dev_printk(KERN_INFO, &pdev->dev,
722 "controller can't do 64bit DMA, forcing 32bit\n");
723 cap &= ~HOST_CAP_64;
724 }
725
726 if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) {
727 dev_printk(KERN_INFO, &pdev->dev,
728 "controller can't do NCQ, turning off CAP_NCQ\n");
729 cap &= ~HOST_CAP_NCQ;
730 }
731
732 if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) {
733 dev_printk(KERN_INFO, &pdev->dev,
734 "controller can do NCQ, turning on CAP_NCQ\n");
735 cap |= HOST_CAP_NCQ;
736 }
737
738 if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) {
739 dev_printk(KERN_INFO, &pdev->dev,
740 "controller can't do PMP, turning off CAP_PMP\n");
741 cap &= ~HOST_CAP_PMP;
742 }
743
744 if (pdev->vendor == PCI_VENDOR_ID_JMICRON && pdev->device == 0x2361 &&
745 port_map != 1) {
746 dev_printk(KERN_INFO, &pdev->dev,
747 "JMB361 has only one port, port_map 0x%x -> 0x%x\n",
748 port_map, 1);
749 port_map = 1;
750 }
751
752 /*
753 * Temporary Marvell 6145 hack: PATA port presence
754 * is asserted through the standard AHCI port
755 * presence register, as bit 4 (counting from 0)
756 */
757 if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
758 if (pdev->device == 0x6121)
759 mv = 0x3;
760 else
761 mv = 0xf;
762 dev_printk(KERN_ERR, &pdev->dev,
763 "MV_AHCI HACK: port_map %x -> %x\n",
764 port_map,
765 port_map & mv);
766 dev_printk(KERN_ERR, &pdev->dev,
767 "Disabling your PATA port. Use the boot option 'ahci.marvell_enable=0' to avoid this.\n");
768
769 port_map &= mv;
770 }
771
772 /* cross check port_map and cap.n_ports */
773 if (port_map) {
774 int map_ports = 0;
775
776 for (i = 0; i < AHCI_MAX_PORTS; i++)
777 if (port_map & (1 << i))
778 map_ports++;
779
780 /* If PI has more ports than n_ports, whine, clear
781 * port_map and let it be generated from n_ports.
782 */
783 if (map_ports > ahci_nr_ports(cap)) {
784 dev_printk(KERN_WARNING, &pdev->dev,
785 "implemented port map (0x%x) contains more "
786 "ports than nr_ports (%u), using nr_ports\n",
787 port_map, ahci_nr_ports(cap));
788 port_map = 0;
789 }
790 }
791
792 /* fabricate port_map from cap.nr_ports */
793 if (!port_map) {
794 port_map = (1 << ahci_nr_ports(cap)) - 1;
795 dev_printk(KERN_WARNING, &pdev->dev,
796 "forcing PORTS_IMPL to 0x%x\n", port_map);
797
798 /* write the fixed up value to the PI register */
799 hpriv->saved_port_map = port_map;
800 }
801
802 /* record values to use during operation */
803 hpriv->cap = cap;
804 hpriv->port_map = port_map;
805 }
806
807 /**
808 * ahci_restore_initial_config - Restore initial config
809 * @host: target ATA host
810 *
811 * Restore initial config stored by ahci_save_initial_config().
812 *
813 * LOCKING:
814 * None.
815 */
816 static void ahci_restore_initial_config(struct ata_host *host)
817 {
818 struct ahci_host_priv *hpriv = host->private_data;
819 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
820
821 writel(hpriv->saved_cap, mmio + HOST_CAP);
822 writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL);
823 (void) readl(mmio + HOST_PORTS_IMPL); /* flush */
824 }
825
826 static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg)
827 {
828 static const int offset[] = {
829 [SCR_STATUS] = PORT_SCR_STAT,
830 [SCR_CONTROL] = PORT_SCR_CTL,
831 [SCR_ERROR] = PORT_SCR_ERR,
832 [SCR_ACTIVE] = PORT_SCR_ACT,
833 [SCR_NOTIFICATION] = PORT_SCR_NTF,
834 };
835 struct ahci_host_priv *hpriv = ap->host->private_data;
836
837 if (sc_reg < ARRAY_SIZE(offset) &&
838 (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF)))
839 return offset[sc_reg];
840 return 0;
841 }
842
843 static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val)
844 {
845 void __iomem *port_mmio = ahci_port_base(link->ap);
846 int offset = ahci_scr_offset(link->ap, sc_reg);
847
848 if (offset) {
849 *val = readl(port_mmio + offset);
850 return 0;
851 }
852 return -EINVAL;
853 }
854
855 static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val)
856 {
857 void __iomem *port_mmio = ahci_port_base(link->ap);
858 int offset = ahci_scr_offset(link->ap, sc_reg);
859
860 if (offset) {
861 writel(val, port_mmio + offset);
862 return 0;
863 }
864 return -EINVAL;
865 }
866
867 static void ahci_start_engine(struct ata_port *ap)
868 {
869 void __iomem *port_mmio = ahci_port_base(ap);
870 u32 tmp;
871
872 /* start DMA */
873 tmp = readl(port_mmio + PORT_CMD);
874 tmp |= PORT_CMD_START;
875 writel(tmp, port_mmio + PORT_CMD);
876 readl(port_mmio + PORT_CMD); /* flush */
877 }
878
879 static int ahci_stop_engine(struct ata_port *ap)
880 {
881 void __iomem *port_mmio = ahci_port_base(ap);
882 u32 tmp;
883
884 tmp = readl(port_mmio + PORT_CMD);
885
886 /* check if the HBA is idle */
887 if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0)
888 return 0;
889
890 /* setting HBA to idle */
891 tmp &= ~PORT_CMD_START;
892 writel(tmp, port_mmio + PORT_CMD);
893
894 /* wait for engine to stop. This could be as long as 500 msec */
895 tmp = ata_wait_register(port_mmio + PORT_CMD,
896 PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500);
897 if (tmp & PORT_CMD_LIST_ON)
898 return -EIO;
899
900 return 0;
901 }
902
903 static void ahci_start_fis_rx(struct ata_port *ap)
904 {
905 void __iomem *port_mmio = ahci_port_base(ap);
906 struct ahci_host_priv *hpriv = ap->host->private_data;
907 struct ahci_port_priv *pp = ap->private_data;
908 u32 tmp;
909
910 /* set FIS registers */
911 if (hpriv->cap & HOST_CAP_64)
912 writel((pp->cmd_slot_dma >> 16) >> 16,
913 port_mmio + PORT_LST_ADDR_HI);
914 writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR);
915
916 if (hpriv->cap & HOST_CAP_64)
917 writel((pp->rx_fis_dma >> 16) >> 16,
918 port_mmio + PORT_FIS_ADDR_HI);
919 writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR);
920
921 /* enable FIS reception */
922 tmp = readl(port_mmio + PORT_CMD);
923 tmp |= PORT_CMD_FIS_RX;
924 writel(tmp, port_mmio + PORT_CMD);
925
926 /* flush */
927 readl(port_mmio + PORT_CMD);
928 }
929
930 static int ahci_stop_fis_rx(struct ata_port *ap)
931 {
932 void __iomem *port_mmio = ahci_port_base(ap);
933 u32 tmp;
934
935 /* disable FIS reception */
936 tmp = readl(port_mmio + PORT_CMD);
937 tmp &= ~PORT_CMD_FIS_RX;
938 writel(tmp, port_mmio + PORT_CMD);
939
940 /* wait for completion, spec says 500ms, give it 1000 */
941 tmp = ata_wait_register(port_mmio + PORT_CMD, PORT_CMD_FIS_ON,
942 PORT_CMD_FIS_ON, 10, 1000);
943 if (tmp & PORT_CMD_FIS_ON)
944 return -EBUSY;
945
946 return 0;
947 }
948
949 static void ahci_power_up(struct ata_port *ap)
950 {
951 struct ahci_host_priv *hpriv = ap->host->private_data;
952 void __iomem *port_mmio = ahci_port_base(ap);
953 u32 cmd;
954
955 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
956
957 /* spin up device */
958 if (hpriv->cap & HOST_CAP_SSS) {
959 cmd |= PORT_CMD_SPIN_UP;
960 writel(cmd, port_mmio + PORT_CMD);
961 }
962
963 /* wake up link */
964 writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD);
965 }
966
967 static void ahci_disable_alpm(struct ata_port *ap)
968 {
969 struct ahci_host_priv *hpriv = ap->host->private_data;
970 void __iomem *port_mmio = ahci_port_base(ap);
971 u32 cmd;
972 struct ahci_port_priv *pp = ap->private_data;
973
974 /* IPM bits should be disabled by libata-core */
975 /* get the existing command bits */
976 cmd = readl(port_mmio + PORT_CMD);
977
978 /* disable ALPM and ASP */
979 cmd &= ~PORT_CMD_ASP;
980 cmd &= ~PORT_CMD_ALPE;
981
982 /* force the interface back to active */
983 cmd |= PORT_CMD_ICC_ACTIVE;
984
985 /* write out new cmd value */
986 writel(cmd, port_mmio + PORT_CMD);
987 cmd = readl(port_mmio + PORT_CMD);
988
989 /* wait 10ms to be sure we've come out of any low power state */
990 msleep(10);
991
992 /* clear out any PhyRdy stuff from interrupt status */
993 writel(PORT_IRQ_PHYRDY, port_mmio + PORT_IRQ_STAT);
994
995 /* go ahead and clean out PhyRdy Change from Serror too */
996 ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18)));
997
998 /*
999 * Clear flag to indicate that we should ignore all PhyRdy
1000 * state changes
1001 */
1002 hpriv->flags &= ~AHCI_HFLAG_NO_HOTPLUG;
1003
1004 /*
1005 * Enable interrupts on Phy Ready.
1006 */
1007 pp->intr_mask |= PORT_IRQ_PHYRDY;
1008 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1009
1010 /*
1011 * don't change the link pm policy - we can be called
1012 * just to turn of link pm temporarily
1013 */
1014 }
1015
1016 static int ahci_enable_alpm(struct ata_port *ap,
1017 enum link_pm policy)
1018 {
1019 struct ahci_host_priv *hpriv = ap->host->private_data;
1020 void __iomem *port_mmio = ahci_port_base(ap);
1021 u32 cmd;
1022 struct ahci_port_priv *pp = ap->private_data;
1023 u32 asp;
1024
1025 /* Make sure the host is capable of link power management */
1026 if (!(hpriv->cap & HOST_CAP_ALPM))
1027 return -EINVAL;
1028
1029 switch (policy) {
1030 case MAX_PERFORMANCE:
1031 case NOT_AVAILABLE:
1032 /*
1033 * if we came here with NOT_AVAILABLE,
1034 * it just means this is the first time we
1035 * have tried to enable - default to max performance,
1036 * and let the user go to lower power modes on request.
1037 */
1038 ahci_disable_alpm(ap);
1039 return 0;
1040 case MIN_POWER:
1041 /* configure HBA to enter SLUMBER */
1042 asp = PORT_CMD_ASP;
1043 break;
1044 case MEDIUM_POWER:
1045 /* configure HBA to enter PARTIAL */
1046 asp = 0;
1047 break;
1048 default:
1049 return -EINVAL;
1050 }
1051
1052 /*
1053 * Disable interrupts on Phy Ready. This keeps us from
1054 * getting woken up due to spurious phy ready interrupts
1055 * TBD - Hot plug should be done via polling now, is
1056 * that even supported?
1057 */
1058 pp->intr_mask &= ~PORT_IRQ_PHYRDY;
1059 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
1060
1061 /*
1062 * Set a flag to indicate that we should ignore all PhyRdy
1063 * state changes since these can happen now whenever we
1064 * change link state
1065 */
1066 hpriv->flags |= AHCI_HFLAG_NO_HOTPLUG;
1067
1068 /* get the existing command bits */
1069 cmd = readl(port_mmio + PORT_CMD);
1070
1071 /*
1072 * Set ASP based on Policy
1073 */
1074 cmd |= asp;
1075
1076 /*
1077 * Setting this bit will instruct the HBA to aggressively
1078 * enter a lower power link state when it's appropriate and
1079 * based on the value set above for ASP
1080 */
1081 cmd |= PORT_CMD_ALPE;
1082
1083 /* write out new cmd value */
1084 writel(cmd, port_mmio + PORT_CMD);
1085 cmd = readl(port_mmio + PORT_CMD);
1086
1087 /* IPM bits should be set by libata-core */
1088 return 0;
1089 }
1090
1091 #ifdef CONFIG_PM
1092 static void ahci_power_down(struct ata_port *ap)
1093 {
1094 struct ahci_host_priv *hpriv = ap->host->private_data;
1095 void __iomem *port_mmio = ahci_port_base(ap);
1096 u32 cmd, scontrol;
1097
1098 if (!(hpriv->cap & HOST_CAP_SSS))
1099 return;
1100
1101 /* put device into listen mode, first set PxSCTL.DET to 0 */
1102 scontrol = readl(port_mmio + PORT_SCR_CTL);
1103 scontrol &= ~0xf;
1104 writel(scontrol, port_mmio + PORT_SCR_CTL);
1105
1106 /* then set PxCMD.SUD to 0 */
1107 cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK;
1108 cmd &= ~PORT_CMD_SPIN_UP;
1109 writel(cmd, port_mmio + PORT_CMD);
1110 }
1111 #endif
1112
1113 static void ahci_start_port(struct ata_port *ap)
1114 {
1115 struct ahci_port_priv *pp = ap->private_data;
1116 struct ata_link *link;
1117 struct ahci_em_priv *emp;
1118
1119 /* enable FIS reception */
1120 ahci_start_fis_rx(ap);
1121
1122 /* enable DMA */
1123 ahci_start_engine(ap);
1124
1125 /* turn on LEDs */
1126 if (ap->flags & ATA_FLAG_EM) {
1127 ata_for_each_link(link, ap, EDGE) {
1128 emp = &pp->em_priv[link->pmp];
1129 ahci_transmit_led_message(ap, emp->led_state, 4);
1130 }
1131 }
1132
1133 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
1134 ata_for_each_link(link, ap, EDGE)
1135 ahci_init_sw_activity(link);
1136
1137 }
1138
1139 static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
1140 {
1141 int rc;
1142
1143 /* disable DMA */
1144 rc = ahci_stop_engine(ap);
1145 if (rc) {
1146 *emsg = "failed to stop engine";
1147 return rc;
1148 }
1149
1150 /* disable FIS reception */
1151 rc = ahci_stop_fis_rx(ap);
1152 if (rc) {
1153 *emsg = "failed stop FIS RX";
1154 return rc;
1155 }
1156
1157 return 0;
1158 }
1159
1160 static int ahci_reset_controller(struct ata_host *host)
1161 {
1162 struct pci_dev *pdev = to_pci_dev(host->dev);
1163 struct ahci_host_priv *hpriv = host->private_data;
1164 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1165 u32 tmp;
1166
1167 /* we must be in AHCI mode, before using anything
1168 * AHCI-specific, such as HOST_RESET.
1169 */
1170 ahci_enable_ahci(mmio);
1171
1172 /* global controller reset */
1173 if (!ahci_skip_host_reset) {
1174 tmp = readl(mmio + HOST_CTL);
1175 if ((tmp & HOST_RESET) == 0) {
1176 writel(tmp | HOST_RESET, mmio + HOST_CTL);
1177 readl(mmio + HOST_CTL); /* flush */
1178 }
1179
1180 /*
1181 * to perform host reset, OS should set HOST_RESET
1182 * and poll until this bit is read to be "0".
1183 * reset must complete within 1 second, or
1184 * the hardware should be considered fried.
1185 */
1186 tmp = ata_wait_register(mmio + HOST_CTL, HOST_RESET,
1187 HOST_RESET, 10, 1000);
1188
1189 if (tmp & HOST_RESET) {
1190 dev_printk(KERN_ERR, host->dev,
1191 "controller reset failed (0x%x)\n", tmp);
1192 return -EIO;
1193 }
1194
1195 /* turn on AHCI mode */
1196 ahci_enable_ahci(mmio);
1197
1198 /* Some registers might be cleared on reset. Restore
1199 * initial values.
1200 */
1201 ahci_restore_initial_config(host);
1202 } else
1203 dev_printk(KERN_INFO, host->dev,
1204 "skipping global host reset\n");
1205
1206 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
1207 u16 tmp16;
1208
1209 /* configure PCS */
1210 pci_read_config_word(pdev, 0x92, &tmp16);
1211 if ((tmp16 & hpriv->port_map) != hpriv->port_map) {
1212 tmp16 |= hpriv->port_map;
1213 pci_write_config_word(pdev, 0x92, tmp16);
1214 }
1215 }
1216
1217 return 0;
1218 }
1219
1220 static void ahci_sw_activity(struct ata_link *link)
1221 {
1222 struct ata_port *ap = link->ap;
1223 struct ahci_port_priv *pp = ap->private_data;
1224 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1225
1226 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
1227 return;
1228
1229 emp->activity++;
1230 if (!timer_pending(&emp->timer))
1231 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
1232 }
1233
1234 static void ahci_sw_activity_blink(unsigned long arg)
1235 {
1236 struct ata_link *link = (struct ata_link *)arg;
1237 struct ata_port *ap = link->ap;
1238 struct ahci_port_priv *pp = ap->private_data;
1239 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1240 unsigned long led_message = emp->led_state;
1241 u32 activity_led_state;
1242 unsigned long flags;
1243
1244 led_message &= EM_MSG_LED_VALUE;
1245 led_message |= ap->port_no | (link->pmp << 8);
1246
1247 /* check to see if we've had activity. If so,
1248 * toggle state of LED and reset timer. If not,
1249 * turn LED to desired idle state.
1250 */
1251 spin_lock_irqsave(ap->lock, flags);
1252 if (emp->saved_activity != emp->activity) {
1253 emp->saved_activity = emp->activity;
1254 /* get the current LED state */
1255 activity_led_state = led_message & EM_MSG_LED_VALUE_ON;
1256
1257 if (activity_led_state)
1258 activity_led_state = 0;
1259 else
1260 activity_led_state = 1;
1261
1262 /* clear old state */
1263 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1264
1265 /* toggle state */
1266 led_message |= (activity_led_state << 16);
1267 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
1268 } else {
1269 /* switch to idle */
1270 led_message &= ~EM_MSG_LED_VALUE_ACTIVITY;
1271 if (emp->blink_policy == BLINK_OFF)
1272 led_message |= (1 << 16);
1273 }
1274 spin_unlock_irqrestore(ap->lock, flags);
1275 ahci_transmit_led_message(ap, led_message, 4);
1276 }
1277
1278 static void ahci_init_sw_activity(struct ata_link *link)
1279 {
1280 struct ata_port *ap = link->ap;
1281 struct ahci_port_priv *pp = ap->private_data;
1282 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1283
1284 /* init activity stats, setup timer */
1285 emp->saved_activity = emp->activity = 0;
1286 setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link);
1287
1288 /* check our blink policy and set flag for link if it's enabled */
1289 if (emp->blink_policy)
1290 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1291 }
1292
1293 static int ahci_reset_em(struct ata_host *host)
1294 {
1295 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1296 u32 em_ctl;
1297
1298 em_ctl = readl(mmio + HOST_EM_CTL);
1299 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
1300 return -EINVAL;
1301
1302 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
1303 return 0;
1304 }
1305
1306 static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
1307 ssize_t size)
1308 {
1309 struct ahci_host_priv *hpriv = ap->host->private_data;
1310 struct ahci_port_priv *pp = ap->private_data;
1311 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1312 u32 em_ctl;
1313 u32 message[] = {0, 0};
1314 unsigned long flags;
1315 int pmp;
1316 struct ahci_em_priv *emp;
1317
1318 /* get the slot number from the message */
1319 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1320 if (pmp < MAX_SLOTS)
1321 emp = &pp->em_priv[pmp];
1322 else
1323 return -EINVAL;
1324
1325 spin_lock_irqsave(ap->lock, flags);
1326
1327 /*
1328 * if we are still busy transmitting a previous message,
1329 * do not allow
1330 */
1331 em_ctl = readl(mmio + HOST_EM_CTL);
1332 if (em_ctl & EM_CTL_TM) {
1333 spin_unlock_irqrestore(ap->lock, flags);
1334 return -EINVAL;
1335 }
1336
1337 /*
1338 * create message header - this is all zero except for
1339 * the message size, which is 4 bytes.
1340 */
1341 message[0] |= (4 << 8);
1342
1343 /* ignore 0:4 of byte zero, fill in port info yourself */
1344 message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no);
1345
1346 /* write message to EM_LOC */
1347 writel(message[0], mmio + hpriv->em_loc);
1348 writel(message[1], mmio + hpriv->em_loc+4);
1349
1350 /* save off new led state for port/slot */
1351 emp->led_state = message[1];
1352
1353 /*
1354 * tell hardware to transmit the message
1355 */
1356 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
1357
1358 spin_unlock_irqrestore(ap->lock, flags);
1359 return size;
1360 }
1361
1362 static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
1363 {
1364 struct ahci_port_priv *pp = ap->private_data;
1365 struct ata_link *link;
1366 struct ahci_em_priv *emp;
1367 int rc = 0;
1368
1369 ata_for_each_link(link, ap, EDGE) {
1370 emp = &pp->em_priv[link->pmp];
1371 rc += sprintf(buf, "%lx\n", emp->led_state);
1372 }
1373 return rc;
1374 }
1375
1376 static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
1377 size_t size)
1378 {
1379 int state;
1380 int pmp;
1381 struct ahci_port_priv *pp = ap->private_data;
1382 struct ahci_em_priv *emp;
1383
1384 state = simple_strtoul(buf, NULL, 0);
1385
1386 /* get the slot number from the message */
1387 pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8;
1388 if (pmp < MAX_SLOTS)
1389 emp = &pp->em_priv[pmp];
1390 else
1391 return -EINVAL;
1392
1393 /* mask off the activity bits if we are in sw_activity
1394 * mode, user should turn off sw_activity before setting
1395 * activity led through em_message
1396 */
1397 if (emp->blink_policy)
1398 state &= ~EM_MSG_LED_VALUE_ACTIVITY;
1399
1400 return ahci_transmit_led_message(ap, state, size);
1401 }
1402
1403 static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1404 {
1405 struct ata_link *link = dev->link;
1406 struct ata_port *ap = link->ap;
1407 struct ahci_port_priv *pp = ap->private_data;
1408 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1409 u32 port_led_state = emp->led_state;
1410
1411 /* save the desired Activity LED behavior */
1412 if (val == OFF) {
1413 /* clear LFLAG */
1414 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1415
1416 /* set the LED to OFF */
1417 port_led_state &= EM_MSG_LED_VALUE_OFF;
1418 port_led_state |= (ap->port_no | (link->pmp << 8));
1419 ahci_transmit_led_message(ap, port_led_state, 4);
1420 } else {
1421 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1422 if (val == BLINK_OFF) {
1423 /* set LED to ON for idle */
1424 port_led_state &= EM_MSG_LED_VALUE_OFF;
1425 port_led_state |= (ap->port_no | (link->pmp << 8));
1426 port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */
1427 ahci_transmit_led_message(ap, port_led_state, 4);
1428 }
1429 }
1430 emp->blink_policy = val;
1431 return 0;
1432 }
1433
1434 static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1435 {
1436 struct ata_link *link = dev->link;
1437 struct ata_port *ap = link->ap;
1438 struct ahci_port_priv *pp = ap->private_data;
1439 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1440
1441 /* display the saved value of activity behavior for this
1442 * disk.
1443 */
1444 return sprintf(buf, "%d\n", emp->blink_policy);
1445 }
1446
1447 static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
1448 int port_no, void __iomem *mmio,
1449 void __iomem *port_mmio)
1450 {
1451 const char *emsg = NULL;
1452 int rc;
1453 u32 tmp;
1454
1455 /* make sure port is not active */
1456 rc = ahci_deinit_port(ap, &emsg);
1457 if (rc)
1458 dev_printk(KERN_WARNING, &pdev->dev,
1459 "%s (%d)\n", emsg, rc);
1460
1461 /* clear SError */
1462 tmp = readl(port_mmio + PORT_SCR_ERR);
1463 VPRINTK("PORT_SCR_ERR 0x%x\n", tmp);
1464 writel(tmp, port_mmio + PORT_SCR_ERR);
1465
1466 /* clear port IRQ */
1467 tmp = readl(port_mmio + PORT_IRQ_STAT);
1468 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1469 if (tmp)
1470 writel(tmp, port_mmio + PORT_IRQ_STAT);
1471
1472 writel(1 << port_no, mmio + HOST_IRQ_STAT);
1473 }
1474
1475 static void ahci_init_controller(struct ata_host *host)
1476 {
1477 struct ahci_host_priv *hpriv = host->private_data;
1478 struct pci_dev *pdev = to_pci_dev(host->dev);
1479 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1480 int i;
1481 void __iomem *port_mmio;
1482 u32 tmp;
1483 int mv;
1484
1485 if (hpriv->flags & AHCI_HFLAG_MV_PATA) {
1486 if (pdev->device == 0x6121)
1487 mv = 2;
1488 else
1489 mv = 4;
1490 port_mmio = __ahci_port_base(host, mv);
1491
1492 writel(0, port_mmio + PORT_IRQ_MASK);
1493
1494 /* clear port IRQ */
1495 tmp = readl(port_mmio + PORT_IRQ_STAT);
1496 VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp);
1497 if (tmp)
1498 writel(tmp, port_mmio + PORT_IRQ_STAT);
1499 }
1500
1501 for (i = 0; i < host->n_ports; i++) {
1502 struct ata_port *ap = host->ports[i];
1503
1504 port_mmio = ahci_port_base(ap);
1505 if (ata_port_is_dummy(ap))
1506 continue;
1507
1508 ahci_port_init(pdev, ap, i, mmio, port_mmio);
1509 }
1510
1511 tmp = readl(mmio + HOST_CTL);
1512 VPRINTK("HOST_CTL 0x%x\n", tmp);
1513 writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL);
1514 tmp = readl(mmio + HOST_CTL);
1515 VPRINTK("HOST_CTL 0x%x\n", tmp);
1516 }
1517
1518 static void ahci_dev_config(struct ata_device *dev)
1519 {
1520 struct ahci_host_priv *hpriv = dev->link->ap->host->private_data;
1521
1522 if (hpriv->flags & AHCI_HFLAG_SECT255) {
1523 dev->max_sectors = 255;
1524 ata_dev_printk(dev, KERN_INFO,
1525 "SB600 AHCI: limiting to 255 sectors per cmd\n");
1526 }
1527 }
1528
1529 static unsigned int ahci_dev_classify(struct ata_port *ap)
1530 {
1531 void __iomem *port_mmio = ahci_port_base(ap);
1532 struct ata_taskfile tf;
1533 u32 tmp;
1534
1535 tmp = readl(port_mmio + PORT_SIG);
1536 tf.lbah = (tmp >> 24) & 0xff;
1537 tf.lbam = (tmp >> 16) & 0xff;
1538 tf.lbal = (tmp >> 8) & 0xff;
1539 tf.nsect = (tmp) & 0xff;
1540
1541 return ata_dev_classify(&tf);
1542 }
1543
1544 static void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag,
1545 u32 opts)
1546 {
1547 dma_addr_t cmd_tbl_dma;
1548
1549 cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ;
1550
1551 pp->cmd_slot[tag].opts = cpu_to_le32(opts);
1552 pp->cmd_slot[tag].status = 0;
1553 pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff);
1554 pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16);
1555 }
1556
1557 static int ahci_kick_engine(struct ata_port *ap, int force_restart)
1558 {
1559 void __iomem *port_mmio = ahci_port_base(ap);
1560 struct ahci_host_priv *hpriv = ap->host->private_data;
1561 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1562 u32 tmp;
1563 int busy, rc;
1564
1565 /* do we need to kick the port? */
1566 busy = status & (ATA_BUSY | ATA_DRQ);
1567 if (!busy && !force_restart)
1568 return 0;
1569
1570 /* stop engine */
1571 rc = ahci_stop_engine(ap);
1572 if (rc)
1573 goto out_restart;
1574
1575 /* need to do CLO? */
1576 if (!busy) {
1577 rc = 0;
1578 goto out_restart;
1579 }
1580
1581 if (!(hpriv->cap & HOST_CAP_CLO)) {
1582 rc = -EOPNOTSUPP;
1583 goto out_restart;
1584 }
1585
1586 /* perform CLO */
1587 tmp = readl(port_mmio + PORT_CMD);
1588 tmp |= PORT_CMD_CLO;
1589 writel(tmp, port_mmio + PORT_CMD);
1590
1591 rc = 0;
1592 tmp = ata_wait_register(port_mmio + PORT_CMD,
1593 PORT_CMD_CLO, PORT_CMD_CLO, 1, 500);
1594 if (tmp & PORT_CMD_CLO)
1595 rc = -EIO;
1596
1597 /* restart engine */
1598 out_restart:
1599 ahci_start_engine(ap);
1600 return rc;
1601 }
1602
1603 static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp,
1604 struct ata_taskfile *tf, int is_cmd, u16 flags,
1605 unsigned long timeout_msec)
1606 {
1607 const u32 cmd_fis_len = 5; /* five dwords */
1608 struct ahci_port_priv *pp = ap->private_data;
1609 void __iomem *port_mmio = ahci_port_base(ap);
1610 u8 *fis = pp->cmd_tbl;
1611 u32 tmp;
1612
1613 /* prep the command */
1614 ata_tf_to_fis(tf, pmp, is_cmd, fis);
1615 ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12));
1616
1617 /* issue & wait */
1618 writel(1, port_mmio + PORT_CMD_ISSUE);
1619
1620 if (timeout_msec) {
1621 tmp = ata_wait_register(port_mmio + PORT_CMD_ISSUE, 0x1, 0x1,
1622 1, timeout_msec);
1623 if (tmp & 0x1) {
1624 ahci_kick_engine(ap, 1);
1625 return -EBUSY;
1626 }
1627 } else
1628 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1629
1630 return 0;
1631 }
1632
1633 static int ahci_do_softreset(struct ata_link *link, unsigned int *class,
1634 int pmp, unsigned long deadline,
1635 int (*check_ready)(struct ata_link *link))
1636 {
1637 struct ata_port *ap = link->ap;
1638 const char *reason = NULL;
1639 unsigned long now, msecs;
1640 struct ata_taskfile tf;
1641 int rc;
1642
1643 DPRINTK("ENTER\n");
1644
1645 /* prepare for SRST (AHCI-1.1 10.4.1) */
1646 rc = ahci_kick_engine(ap, 1);
1647 if (rc && rc != -EOPNOTSUPP)
1648 ata_link_printk(link, KERN_WARNING,
1649 "failed to reset engine (errno=%d)\n", rc);
1650
1651 ata_tf_init(link->device, &tf);
1652
1653 /* issue the first D2H Register FIS */
1654 msecs = 0;
1655 now = jiffies;
1656 if (time_after(now, deadline))
1657 msecs = jiffies_to_msecs(deadline - now);
1658
1659 tf.ctl |= ATA_SRST;
1660 if (ahci_exec_polled_cmd(ap, pmp, &tf, 0,
1661 AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) {
1662 rc = -EIO;
1663 reason = "1st FIS failed";
1664 goto fail;
1665 }
1666
1667 /* spec says at least 5us, but be generous and sleep for 1ms */
1668 msleep(1);
1669
1670 /* issue the second D2H Register FIS */
1671 tf.ctl &= ~ATA_SRST;
1672 ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0);
1673
1674 /* wait for link to become ready */
1675 rc = ata_wait_after_reset(link, deadline, check_ready);
1676 /* link occupied, -ENODEV too is an error */
1677 if (rc) {
1678 reason = "device not ready";
1679 goto fail;
1680 }
1681 *class = ahci_dev_classify(ap);
1682
1683 DPRINTK("EXIT, class=%u\n", *class);
1684 return 0;
1685
1686 fail:
1687 ata_link_printk(link, KERN_ERR, "softreset failed (%s)\n", reason);
1688 return rc;
1689 }
1690
1691 static int ahci_check_ready(struct ata_link *link)
1692 {
1693 void __iomem *port_mmio = ahci_port_base(link->ap);
1694 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1695
1696 return ata_check_ready(status);
1697 }
1698
1699 static int ahci_softreset(struct ata_link *link, unsigned int *class,
1700 unsigned long deadline)
1701 {
1702 int pmp = sata_srst_pmp(link);
1703
1704 DPRINTK("ENTER\n");
1705
1706 return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready);
1707 }
1708
1709 static int ahci_sb600_check_ready(struct ata_link *link)
1710 {
1711 void __iomem *port_mmio = ahci_port_base(link->ap);
1712 u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF;
1713 u32 irq_status = readl(port_mmio + PORT_IRQ_STAT);
1714
1715 /*
1716 * There is no need to check TFDATA if BAD PMP is found due to HW bug,
1717 * which can save timeout delay.
1718 */
1719 if (irq_status & PORT_IRQ_BAD_PMP)
1720 return -EIO;
1721
1722 return ata_check_ready(status);
1723 }
1724
1725 static int ahci_sb600_softreset(struct ata_link *link, unsigned int *class,
1726 unsigned long deadline)
1727 {
1728 struct ata_port *ap = link->ap;
1729 void __iomem *port_mmio = ahci_port_base(ap);
1730 int pmp = sata_srst_pmp(link);
1731 int rc;
1732 u32 irq_sts;
1733
1734 DPRINTK("ENTER\n");
1735
1736 rc = ahci_do_softreset(link, class, pmp, deadline,
1737 ahci_sb600_check_ready);
1738
1739 /*
1740 * Soft reset fails on some ATI chips with IPMS set when PMP
1741 * is enabled but SATA HDD/ODD is connected to SATA port,
1742 * do soft reset again to port 0.
1743 */
1744 if (rc == -EIO) {
1745 irq_sts = readl(port_mmio + PORT_IRQ_STAT);
1746 if (irq_sts & PORT_IRQ_BAD_PMP) {
1747 ata_link_printk(link, KERN_WARNING,
1748 "failed due to HW bug, retry pmp=0\n");
1749 rc = ahci_do_softreset(link, class, 0, deadline,
1750 ahci_check_ready);
1751 }
1752 }
1753
1754 return rc;
1755 }
1756
1757 static int ahci_hardreset(struct ata_link *link, unsigned int *class,
1758 unsigned long deadline)
1759 {
1760 const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context);
1761 struct ata_port *ap = link->ap;
1762 struct ahci_port_priv *pp = ap->private_data;
1763 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1764 struct ata_taskfile tf;
1765 bool online;
1766 int rc;
1767
1768 DPRINTK("ENTER\n");
1769
1770 ahci_stop_engine(ap);
1771
1772 /* clear D2H reception area to properly wait for D2H FIS */
1773 ata_tf_init(link->device, &tf);
1774 tf.command = 0x80;
1775 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1776
1777 rc = sata_link_hardreset(link, timing, deadline, &online,
1778 ahci_check_ready);
1779
1780 ahci_start_engine(ap);
1781
1782 if (online)
1783 *class = ahci_dev_classify(ap);
1784
1785 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1786 return rc;
1787 }
1788
1789 static int ahci_vt8251_hardreset(struct ata_link *link, unsigned int *class,
1790 unsigned long deadline)
1791 {
1792 struct ata_port *ap = link->ap;
1793 bool online;
1794 int rc;
1795
1796 DPRINTK("ENTER\n");
1797
1798 ahci_stop_engine(ap);
1799
1800 rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
1801 deadline, &online, NULL);
1802
1803 ahci_start_engine(ap);
1804
1805 DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class);
1806
1807 /* vt8251 doesn't clear BSY on signature FIS reception,
1808 * request follow-up softreset.
1809 */
1810 return online ? -EAGAIN : rc;
1811 }
1812
1813 static int ahci_p5wdh_hardreset(struct ata_link *link, unsigned int *class,
1814 unsigned long deadline)
1815 {
1816 struct ata_port *ap = link->ap;
1817 struct ahci_port_priv *pp = ap->private_data;
1818 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
1819 struct ata_taskfile tf;
1820 bool online;
1821 int rc;
1822
1823 ahci_stop_engine(ap);
1824
1825 /* clear D2H reception area to properly wait for D2H FIS */
1826 ata_tf_init(link->device, &tf);
1827 tf.command = 0x80;
1828 ata_tf_to_fis(&tf, 0, 0, d2h_fis);
1829
1830 rc = sata_link_hardreset(link, sata_ehc_deb_timing(&link->eh_context),
1831 deadline, &online, NULL);
1832
1833 ahci_start_engine(ap);
1834
1835 /* The pseudo configuration device on SIMG4726 attached to
1836 * ASUS P5W-DH Deluxe doesn't send signature FIS after
1837 * hardreset if no device is attached to the first downstream
1838 * port && the pseudo device locks up on SRST w/ PMP==0. To
1839 * work around this, wait for !BSY only briefly. If BSY isn't
1840 * cleared, perform CLO and proceed to IDENTIFY (achieved by
1841 * ATA_LFLAG_NO_SRST and ATA_LFLAG_ASSUME_ATA).
1842 *
1843 * Wait for two seconds. Devices attached to downstream port
1844 * which can't process the following IDENTIFY after this will
1845 * have to be reset again. For most cases, this should
1846 * suffice while making probing snappish enough.
1847 */
1848 if (online) {
1849 rc = ata_wait_after_reset(link, jiffies + 2 * HZ,
1850 ahci_check_ready);
1851 if (rc)
1852 ahci_kick_engine(ap, 0);
1853 }
1854 return rc;
1855 }
1856
1857 static void ahci_postreset(struct ata_link *link, unsigned int *class)
1858 {
1859 struct ata_port *ap = link->ap;
1860 void __iomem *port_mmio = ahci_port_base(ap);
1861 u32 new_tmp, tmp;
1862
1863 ata_std_postreset(link, class);
1864
1865 /* Make sure port's ATAPI bit is set appropriately */
1866 new_tmp = tmp = readl(port_mmio + PORT_CMD);
1867 if (*class == ATA_DEV_ATAPI)
1868 new_tmp |= PORT_CMD_ATAPI;
1869 else
1870 new_tmp &= ~PORT_CMD_ATAPI;
1871 if (new_tmp != tmp) {
1872 writel(new_tmp, port_mmio + PORT_CMD);
1873 readl(port_mmio + PORT_CMD); /* flush */
1874 }
1875 }
1876
1877 static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl)
1878 {
1879 struct scatterlist *sg;
1880 struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ;
1881 unsigned int si;
1882
1883 VPRINTK("ENTER\n");
1884
1885 /*
1886 * Next, the S/G list.
1887 */
1888 for_each_sg(qc->sg, sg, qc->n_elem, si) {
1889 dma_addr_t addr = sg_dma_address(sg);
1890 u32 sg_len = sg_dma_len(sg);
1891
1892 ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff);
1893 ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16);
1894 ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1);
1895 }
1896
1897 return si;
1898 }
1899
1900 static void ahci_qc_prep(struct ata_queued_cmd *qc)
1901 {
1902 struct ata_port *ap = qc->ap;
1903 struct ahci_port_priv *pp = ap->private_data;
1904 int is_atapi = ata_is_atapi(qc->tf.protocol);
1905 void *cmd_tbl;
1906 u32 opts;
1907 const u32 cmd_fis_len = 5; /* five dwords */
1908 unsigned int n_elem;
1909
1910 /*
1911 * Fill in command table information. First, the header,
1912 * a SATA Register - Host to Device command FIS.
1913 */
1914 cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ;
1915
1916 ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl);
1917 if (is_atapi) {
1918 memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32);
1919 memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len);
1920 }
1921
1922 n_elem = 0;
1923 if (qc->flags & ATA_QCFLAG_DMAMAP)
1924 n_elem = ahci_fill_sg(qc, cmd_tbl);
1925
1926 /*
1927 * Fill in command slot information.
1928 */
1929 opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12);
1930 if (qc->tf.flags & ATA_TFLAG_WRITE)
1931 opts |= AHCI_CMD_WRITE;
1932 if (is_atapi)
1933 opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH;
1934
1935 ahci_fill_cmd_slot(pp, qc->tag, opts);
1936 }
1937
1938 static void ahci_error_intr(struct ata_port *ap, u32 irq_stat)
1939 {
1940 struct ahci_host_priv *hpriv = ap->host->private_data;
1941 struct ahci_port_priv *pp = ap->private_data;
1942 struct ata_eh_info *host_ehi = &ap->link.eh_info;
1943 struct ata_link *link = NULL;
1944 struct ata_queued_cmd *active_qc;
1945 struct ata_eh_info *active_ehi;
1946 u32 serror;
1947
1948 /* determine active link */
1949 ata_for_each_link(link, ap, EDGE)
1950 if (ata_link_active(link))
1951 break;
1952 if (!link)
1953 link = &ap->link;
1954
1955 active_qc = ata_qc_from_tag(ap, link->active_tag);
1956 active_ehi = &link->eh_info;
1957
1958 /* record irq stat */
1959 ata_ehi_clear_desc(host_ehi);
1960 ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat);
1961
1962 /* AHCI needs SError cleared; otherwise, it might lock up */
1963 ahci_scr_read(&ap->link, SCR_ERROR, &serror);
1964 ahci_scr_write(&ap->link, SCR_ERROR, serror);
1965 host_ehi->serror |= serror;
1966
1967 /* some controllers set IRQ_IF_ERR on device errors, ignore it */
1968 if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR)
1969 irq_stat &= ~PORT_IRQ_IF_ERR;
1970
1971 if (irq_stat & PORT_IRQ_TF_ERR) {
1972 /* If qc is active, charge it; otherwise, the active
1973 * link. There's no active qc on NCQ errors. It will
1974 * be determined by EH by reading log page 10h.
1975 */
1976 if (active_qc)
1977 active_qc->err_mask |= AC_ERR_DEV;
1978 else
1979 active_ehi->err_mask |= AC_ERR_DEV;
1980
1981 if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL)
1982 host_ehi->serror &= ~SERR_INTERNAL;
1983 }
1984
1985 if (irq_stat & PORT_IRQ_UNK_FIS) {
1986 u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK);
1987
1988 active_ehi->err_mask |= AC_ERR_HSM;
1989 active_ehi->action |= ATA_EH_RESET;
1990 ata_ehi_push_desc(active_ehi,
1991 "unknown FIS %08x %08x %08x %08x" ,
1992 unk[0], unk[1], unk[2], unk[3]);
1993 }
1994
1995 if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) {
1996 active_ehi->err_mask |= AC_ERR_HSM;
1997 active_ehi->action |= ATA_EH_RESET;
1998 ata_ehi_push_desc(active_ehi, "incorrect PMP");
1999 }
2000
2001 if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) {
2002 host_ehi->err_mask |= AC_ERR_HOST_BUS;
2003 host_ehi->action |= ATA_EH_RESET;
2004 ata_ehi_push_desc(host_ehi, "host bus error");
2005 }
2006
2007 if (irq_stat & PORT_IRQ_IF_ERR) {
2008 host_ehi->err_mask |= AC_ERR_ATA_BUS;
2009 host_ehi->action |= ATA_EH_RESET;
2010 ata_ehi_push_desc(host_ehi, "interface fatal error");
2011 }
2012
2013 if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) {
2014 ata_ehi_hotplugged(host_ehi);
2015 ata_ehi_push_desc(host_ehi, "%s",
2016 irq_stat & PORT_IRQ_CONNECT ?
2017 "connection status changed" : "PHY RDY changed");
2018 }
2019
2020 /* okay, let's hand over to EH */
2021
2022 if (irq_stat & PORT_IRQ_FREEZE)
2023 ata_port_freeze(ap);
2024 else
2025 ata_port_abort(ap);
2026 }
2027
2028 static void ahci_port_intr(struct ata_port *ap)
2029 {
2030 void __iomem *port_mmio = ahci_port_base(ap);
2031 struct ata_eh_info *ehi = &ap->link.eh_info;
2032 struct ahci_port_priv *pp = ap->private_data;
2033 struct ahci_host_priv *hpriv = ap->host->private_data;
2034 int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING);
2035 u32 status, qc_active;
2036 int rc;
2037
2038 status = readl(port_mmio + PORT_IRQ_STAT);
2039 writel(status, port_mmio + PORT_IRQ_STAT);
2040
2041 /* ignore BAD_PMP while resetting */
2042 if (unlikely(resetting))
2043 status &= ~PORT_IRQ_BAD_PMP;
2044
2045 /* If we are getting PhyRdy, this is
2046 * just a power state change, we should
2047 * clear out this, plus the PhyRdy/Comm
2048 * Wake bits from Serror
2049 */
2050 if ((hpriv->flags & AHCI_HFLAG_NO_HOTPLUG) &&
2051 (status & PORT_IRQ_PHYRDY)) {
2052 status &= ~PORT_IRQ_PHYRDY;
2053 ahci_scr_write(&ap->link, SCR_ERROR, ((1 << 16) | (1 << 18)));
2054 }
2055
2056 if (unlikely(status & PORT_IRQ_ERROR)) {
2057 ahci_error_intr(ap, status);
2058 return;
2059 }
2060
2061 if (status & PORT_IRQ_SDB_FIS) {
2062 /* If SNotification is available, leave notification
2063 * handling to sata_async_notification(). If not,
2064 * emulate it by snooping SDB FIS RX area.
2065 *
2066 * Snooping FIS RX area is probably cheaper than
2067 * poking SNotification but some constrollers which
2068 * implement SNotification, ICH9 for example, don't
2069 * store AN SDB FIS into receive area.
2070 */
2071 if (hpriv->cap & HOST_CAP_SNTF)
2072 sata_async_notification(ap);
2073 else {
2074 /* If the 'N' bit in word 0 of the FIS is set,
2075 * we just received asynchronous notification.
2076 * Tell libata about it.
2077 */
2078 const __le32 *f = pp->rx_fis + RX_FIS_SDB;
2079 u32 f0 = le32_to_cpu(f[0]);
2080
2081 if (f0 & (1 << 15))
2082 sata_async_notification(ap);
2083 }
2084 }
2085
2086 /* pp->active_link is valid iff any command is in flight */
2087 if (ap->qc_active && pp->active_link->sactive)
2088 qc_active = readl(port_mmio + PORT_SCR_ACT);
2089 else
2090 qc_active = readl(port_mmio + PORT_CMD_ISSUE);
2091
2092 rc = ata_qc_complete_multiple(ap, qc_active);
2093
2094 /* while resetting, invalid completions are expected */
2095 if (unlikely(rc < 0 && !resetting)) {
2096 ehi->err_mask |= AC_ERR_HSM;
2097 ehi->action |= ATA_EH_RESET;
2098 ata_port_freeze(ap);
2099 }
2100 }
2101
2102 static irqreturn_t ahci_interrupt(int irq, void *dev_instance)
2103 {
2104 struct ata_host *host = dev_instance;
2105 struct ahci_host_priv *hpriv;
2106 unsigned int i, handled = 0;
2107 void __iomem *mmio;
2108 u32 irq_stat, irq_masked;
2109
2110 VPRINTK("ENTER\n");
2111
2112 hpriv = host->private_data;
2113 mmio = host->iomap[AHCI_PCI_BAR];
2114
2115 /* sigh. 0xffffffff is a valid return from h/w */
2116 irq_stat = readl(mmio + HOST_IRQ_STAT);
2117 if (!irq_stat)
2118 return IRQ_NONE;
2119
2120 irq_masked = irq_stat & hpriv->port_map;
2121
2122 spin_lock(&host->lock);
2123
2124 for (i = 0; i < host->n_ports; i++) {
2125 struct ata_port *ap;
2126
2127 if (!(irq_masked & (1 << i)))
2128 continue;
2129
2130 ap = host->ports[i];
2131 if (ap) {
2132 ahci_port_intr(ap);
2133 VPRINTK("port %u\n", i);
2134 } else {
2135 VPRINTK("port %u (no irq)\n", i);
2136 if (ata_ratelimit())
2137 dev_printk(KERN_WARNING, host->dev,
2138 "interrupt on disabled port %u\n", i);
2139 }
2140
2141 handled = 1;
2142 }
2143
2144 /* HOST_IRQ_STAT behaves as level triggered latch meaning that
2145 * it should be cleared after all the port events are cleared;
2146 * otherwise, it will raise a spurious interrupt after each
2147 * valid one. Please read section 10.6.2 of ahci 1.1 for more
2148 * information.
2149 *
2150 * Also, use the unmasked value to clear interrupt as spurious
2151 * pending event on a dummy port might cause screaming IRQ.
2152 */
2153 writel(irq_stat, mmio + HOST_IRQ_STAT);
2154
2155 spin_unlock(&host->lock);
2156
2157 VPRINTK("EXIT\n");
2158
2159 return IRQ_RETVAL(handled);
2160 }
2161
2162 static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
2163 {
2164 struct ata_port *ap = qc->ap;
2165 void __iomem *port_mmio = ahci_port_base(ap);
2166 struct ahci_port_priv *pp = ap->private_data;
2167
2168 /* Keep track of the currently active link. It will be used
2169 * in completion path to determine whether NCQ phase is in
2170 * progress.
2171 */
2172 pp->active_link = qc->dev->link;
2173
2174 if (qc->tf.protocol == ATA_PROT_NCQ)
2175 writel(1 << qc->tag, port_mmio + PORT_SCR_ACT);
2176 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
2177
2178 ahci_sw_activity(qc->dev->link);
2179
2180 return 0;
2181 }
2182
2183 static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc)
2184 {
2185 struct ahci_port_priv *pp = qc->ap->private_data;
2186 u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG;
2187
2188 ata_tf_from_fis(d2h_fis, &qc->result_tf);
2189 return true;
2190 }
2191
2192 static void ahci_freeze(struct ata_port *ap)
2193 {
2194 void __iomem *port_mmio = ahci_port_base(ap);
2195
2196 /* turn IRQ off */
2197 writel(0, port_mmio + PORT_IRQ_MASK);
2198 }
2199
2200 static void ahci_thaw(struct ata_port *ap)
2201 {
2202 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
2203 void __iomem *port_mmio = ahci_port_base(ap);
2204 u32 tmp;
2205 struct ahci_port_priv *pp = ap->private_data;
2206
2207 /* clear IRQ */
2208 tmp = readl(port_mmio + PORT_IRQ_STAT);
2209 writel(tmp, port_mmio + PORT_IRQ_STAT);
2210 writel(1 << ap->port_no, mmio + HOST_IRQ_STAT);
2211
2212 /* turn IRQ back on */
2213 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2214 }
2215
2216 static void ahci_error_handler(struct ata_port *ap)
2217 {
2218 if (!(ap->pflags & ATA_PFLAG_FROZEN)) {
2219 /* restart engine */
2220 ahci_stop_engine(ap);
2221 ahci_start_engine(ap);
2222 }
2223
2224 sata_pmp_error_handler(ap);
2225 }
2226
2227 static void ahci_post_internal_cmd(struct ata_queued_cmd *qc)
2228 {
2229 struct ata_port *ap = qc->ap;
2230
2231 /* make DMA engine forget about the failed command */
2232 if (qc->flags & ATA_QCFLAG_FAILED)
2233 ahci_kick_engine(ap, 1);
2234 }
2235
2236 static void ahci_pmp_attach(struct ata_port *ap)
2237 {
2238 void __iomem *port_mmio = ahci_port_base(ap);
2239 struct ahci_port_priv *pp = ap->private_data;
2240 u32 cmd;
2241
2242 cmd = readl(port_mmio + PORT_CMD);
2243 cmd |= PORT_CMD_PMP;
2244 writel(cmd, port_mmio + PORT_CMD);
2245
2246 pp->intr_mask |= PORT_IRQ_BAD_PMP;
2247 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2248 }
2249
2250 static void ahci_pmp_detach(struct ata_port *ap)
2251 {
2252 void __iomem *port_mmio = ahci_port_base(ap);
2253 struct ahci_port_priv *pp = ap->private_data;
2254 u32 cmd;
2255
2256 cmd = readl(port_mmio + PORT_CMD);
2257 cmd &= ~PORT_CMD_PMP;
2258 writel(cmd, port_mmio + PORT_CMD);
2259
2260 pp->intr_mask &= ~PORT_IRQ_BAD_PMP;
2261 writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK);
2262 }
2263
2264 static int ahci_port_resume(struct ata_port *ap)
2265 {
2266 ahci_power_up(ap);
2267 ahci_start_port(ap);
2268
2269 if (sata_pmp_attached(ap))
2270 ahci_pmp_attach(ap);
2271 else
2272 ahci_pmp_detach(ap);
2273
2274 return 0;
2275 }
2276
2277 #ifdef CONFIG_PM
2278 static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg)
2279 {
2280 const char *emsg = NULL;
2281 int rc;
2282
2283 rc = ahci_deinit_port(ap, &emsg);
2284 if (rc == 0)
2285 ahci_power_down(ap);
2286 else {
2287 ata_port_printk(ap, KERN_ERR, "%s (%d)\n", emsg, rc);
2288 ahci_start_port(ap);
2289 }
2290
2291 return rc;
2292 }
2293
2294 static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg)
2295 {
2296 struct ata_host *host = dev_get_drvdata(&pdev->dev);
2297 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
2298 u32 ctl;
2299
2300 if (mesg.event & PM_EVENT_SLEEP) {
2301 /* AHCI spec rev1.1 section 8.3.3:
2302 * Software must disable interrupts prior to requesting a
2303 * transition of the HBA to D3 state.
2304 */
2305 ctl = readl(mmio + HOST_CTL);
2306 ctl &= ~HOST_IRQ_EN;
2307 writel(ctl, mmio + HOST_CTL);
2308 readl(mmio + HOST_CTL); /* flush */
2309 }
2310
2311 return ata_pci_device_suspend(pdev, mesg);
2312 }
2313
2314 static int ahci_pci_device_resume(struct pci_dev *pdev)
2315 {
2316 struct ata_host *host = dev_get_drvdata(&pdev->dev);
2317 int rc;
2318
2319 rc = ata_pci_device_do_resume(pdev);
2320 if (rc)
2321 return rc;
2322
2323 if (pdev->dev.power.power_state.event == PM_EVENT_SUSPEND) {
2324 rc = ahci_reset_controller(host);
2325 if (rc)
2326 return rc;
2327
2328 ahci_init_controller(host);
2329 }
2330
2331 ata_host_resume(host);
2332
2333 return 0;
2334 }
2335 #endif
2336
2337 static int ahci_port_start(struct ata_port *ap)
2338 {
2339 struct device *dev = ap->host->dev;
2340 struct ahci_port_priv *pp;
2341 void *mem;
2342 dma_addr_t mem_dma;
2343
2344 pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL);
2345 if (!pp)
2346 return -ENOMEM;
2347
2348 mem = dmam_alloc_coherent(dev, AHCI_PORT_PRIV_DMA_SZ, &mem_dma,
2349 GFP_KERNEL);
2350 if (!mem)
2351 return -ENOMEM;
2352 memset(mem, 0, AHCI_PORT_PRIV_DMA_SZ);
2353
2354 /*
2355 * First item in chunk of DMA memory: 32-slot command table,
2356 * 32 bytes each in size
2357 */
2358 pp->cmd_slot = mem;
2359 pp->cmd_slot_dma = mem_dma;
2360
2361 mem += AHCI_CMD_SLOT_SZ;
2362 mem_dma += AHCI_CMD_SLOT_SZ;
2363
2364 /*
2365 * Second item: Received-FIS area
2366 */
2367 pp->rx_fis = mem;
2368 pp->rx_fis_dma = mem_dma;
2369
2370 mem += AHCI_RX_FIS_SZ;
2371 mem_dma += AHCI_RX_FIS_SZ;
2372
2373 /*
2374 * Third item: data area for storing a single command
2375 * and its scatter-gather table
2376 */
2377 pp->cmd_tbl = mem;
2378 pp->cmd_tbl_dma = mem_dma;
2379
2380 /*
2381 * Save off initial list of interrupts to be enabled.
2382 * This could be changed later
2383 */
2384 pp->intr_mask = DEF_PORT_IRQ;
2385
2386 ap->private_data = pp;
2387
2388 /* engage engines, captain */
2389 return ahci_port_resume(ap);
2390 }
2391
2392 static void ahci_port_stop(struct ata_port *ap)
2393 {
2394 const char *emsg = NULL;
2395 int rc;
2396
2397 /* de-initialize port */
2398 rc = ahci_deinit_port(ap, &emsg);
2399 if (rc)
2400 ata_port_printk(ap, KERN_WARNING, "%s (%d)\n", emsg, rc);
2401 }
2402
2403 static int ahci_configure_dma_masks(struct pci_dev *pdev, int using_dac)
2404 {
2405 int rc;
2406
2407 if (using_dac &&
2408 !pci_set_dma_mask(pdev, DMA_64BIT_MASK)) {
2409 rc = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
2410 if (rc) {
2411 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
2412 if (rc) {
2413 dev_printk(KERN_ERR, &pdev->dev,
2414 "64-bit DMA enable failed\n");
2415 return rc;
2416 }
2417 }
2418 } else {
2419 rc = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
2420 if (rc) {
2421 dev_printk(KERN_ERR, &pdev->dev,
2422 "32-bit DMA enable failed\n");
2423 return rc;
2424 }
2425 rc = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
2426 if (rc) {
2427 dev_printk(KERN_ERR, &pdev->dev,
2428 "32-bit consistent DMA enable failed\n");
2429 return rc;
2430 }
2431 }
2432 return 0;
2433 }
2434
2435 static void ahci_print_info(struct ata_host *host)
2436 {
2437 struct ahci_host_priv *hpriv = host->private_data;
2438 struct pci_dev *pdev = to_pci_dev(host->dev);
2439 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
2440 u32 vers, cap, impl, speed;
2441 const char *speed_s;
2442 u16 cc;
2443 const char *scc_s;
2444
2445 vers = readl(mmio + HOST_VERSION);
2446 cap = hpriv->cap;
2447 impl = hpriv->port_map;
2448
2449 speed = (cap >> 20) & 0xf;
2450 if (speed == 1)
2451 speed_s = "1.5";
2452 else if (speed == 2)
2453 speed_s = "3";
2454 else if (speed == 3)
2455 speed_s = "6";
2456 else
2457 speed_s = "?";
2458
2459 pci_read_config_word(pdev, 0x0a, &cc);
2460 if (cc == PCI_CLASS_STORAGE_IDE)
2461 scc_s = "IDE";
2462 else if (cc == PCI_CLASS_STORAGE_SATA)
2463 scc_s = "SATA";
2464 else if (cc == PCI_CLASS_STORAGE_RAID)
2465 scc_s = "RAID";
2466 else
2467 scc_s = "unknown";
2468
2469 dev_printk(KERN_INFO, &pdev->dev,
2470 "AHCI %02x%02x.%02x%02x "
2471 "%u slots %u ports %s Gbps 0x%x impl %s mode\n"
2472 ,
2473
2474 (vers >> 24) & 0xff,
2475 (vers >> 16) & 0xff,
2476 (vers >> 8) & 0xff,
2477 vers & 0xff,
2478
2479 ((cap >> 8) & 0x1f) + 1,
2480 (cap & 0x1f) + 1,
2481 speed_s,
2482 impl,
2483 scc_s);
2484
2485 dev_printk(KERN_INFO, &pdev->dev,
2486 "flags: "
2487 "%s%s%s%s%s%s%s"
2488 "%s%s%s%s%s%s%s"
2489 "%s\n"
2490 ,
2491
2492 cap & (1 << 31) ? "64bit " : "",
2493 cap & (1 << 30) ? "ncq " : "",
2494 cap & (1 << 29) ? "sntf " : "",
2495 cap & (1 << 28) ? "ilck " : "",
2496 cap & (1 << 27) ? "stag " : "",
2497 cap & (1 << 26) ? "pm " : "",
2498 cap & (1 << 25) ? "led " : "",
2499
2500 cap & (1 << 24) ? "clo " : "",
2501 cap & (1 << 19) ? "nz " : "",
2502 cap & (1 << 18) ? "only " : "",
2503 cap & (1 << 17) ? "pmp " : "",
2504 cap & (1 << 15) ? "pio " : "",
2505 cap & (1 << 14) ? "slum " : "",
2506 cap & (1 << 13) ? "part " : "",
2507 cap & (1 << 6) ? "ems ": ""
2508 );
2509 }
2510
2511 /* On ASUS P5W DH Deluxe, the second port of PCI device 00:1f.2 is
2512 * hardwired to on-board SIMG 4726. The chipset is ICH8 and doesn't
2513 * support PMP and the 4726 either directly exports the device
2514 * attached to the first downstream port or acts as a hardware storage
2515 * controller and emulate a single ATA device (can be RAID 0/1 or some
2516 * other configuration).
2517 *
2518 * When there's no device attached to the first downstream port of the
2519 * 4726, "Config Disk" appears, which is a pseudo ATA device to
2520 * configure the 4726. However, ATA emulation of the device is very
2521 * lame. It doesn't send signature D2H Reg FIS after the initial
2522 * hardreset, pukes on SRST w/ PMP==0 and has bunch of other issues.
2523 *
2524 * The following function works around the problem by always using
2525 * hardreset on the port and not depending on receiving signature FIS
2526 * afterward. If signature FIS isn't received soon, ATA class is
2527 * assumed without follow-up softreset.
2528 */
2529 static void ahci_p5wdh_workaround(struct ata_host *host)
2530 {
2531 static struct dmi_system_id sysids[] = {
2532 {
2533 .ident = "P5W DH Deluxe",
2534 .matches = {
2535 DMI_MATCH(DMI_SYS_VENDOR,
2536 "ASUSTEK COMPUTER INC"),
2537 DMI_MATCH(DMI_PRODUCT_NAME, "P5W DH Deluxe"),
2538 },
2539 },
2540 { }
2541 };
2542 struct pci_dev *pdev = to_pci_dev(host->dev);
2543
2544 if (pdev->bus->number == 0 && pdev->devfn == PCI_DEVFN(0x1f, 2) &&
2545 dmi_check_system(sysids)) {
2546 struct ata_port *ap = host->ports[1];
2547
2548 dev_printk(KERN_INFO, &pdev->dev, "enabling ASUS P5W DH "
2549 "Deluxe on-board SIMG4726 workaround\n");
2550
2551 ap->ops = &ahci_p5wdh_ops;
2552 ap->link.flags |= ATA_LFLAG_NO_SRST | ATA_LFLAG_ASSUME_ATA;
2553 }
2554 }
2555
2556 static bool ahci_broken_system_poweroff(struct pci_dev *pdev)
2557 {
2558 static const struct dmi_system_id broken_systems[] = {
2559 {
2560 .ident = "HP Compaq nx6310",
2561 .matches = {
2562 DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
2563 DMI_MATCH(DMI_PRODUCT_NAME, "HP Compaq nx6310"),
2564 },
2565 /* PCI slot number of the controller */
2566 .driver_data = (void *)0x1FUL,
2567 },
2568
2569 { } /* terminate list */
2570 };
2571 const struct dmi_system_id *dmi = dmi_first_match(broken_systems);
2572
2573 if (dmi) {
2574 unsigned long slot = (unsigned long)dmi->driver_data;
2575 /* apply the quirk only to on-board controllers */
2576 return slot == PCI_SLOT(pdev->devfn);
2577 }
2578
2579 return false;
2580 }
2581
2582 static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
2583 {
2584 static int printed_version;
2585 unsigned int board_id = ent->driver_data;
2586 struct ata_port_info pi = ahci_port_info[board_id];
2587 const struct ata_port_info *ppi[] = { &pi, NULL };
2588 struct device *dev = &pdev->dev;
2589 struct ahci_host_priv *hpriv;
2590 struct ata_host *host;
2591 int n_ports, i, rc;
2592
2593 VPRINTK("ENTER\n");
2594
2595 WARN_ON(ATA_MAX_QUEUE > AHCI_MAX_CMDS);
2596
2597 if (!printed_version++)
2598 dev_printk(KERN_DEBUG, &pdev->dev, "version " DRV_VERSION "\n");
2599
2600 /* The AHCI driver can only drive the SATA ports, the PATA driver
2601 can drive them all so if both drivers are selected make sure
2602 AHCI stays out of the way */
2603 if (pdev->vendor == PCI_VENDOR_ID_MARVELL && !marvell_enable)
2604 return -ENODEV;
2605
2606 /* acquire resources */
2607 rc = pcim_enable_device(pdev);
2608 if (rc)
2609 return rc;
2610
2611 /* AHCI controllers often implement SFF compatible interface.
2612 * Grab all PCI BARs just in case.
2613 */
2614 rc = pcim_iomap_regions_request_all(pdev, 1 << AHCI_PCI_BAR, DRV_NAME);
2615 if (rc == -EBUSY)
2616 pcim_pin_device(pdev);
2617 if (rc)
2618 return rc;
2619
2620 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
2621 (pdev->device == 0x2652 || pdev->device == 0x2653)) {
2622 u8 map;
2623
2624 /* ICH6s share the same PCI ID for both piix and ahci
2625 * modes. Enabling ahci mode while MAP indicates
2626 * combined mode is a bad idea. Yield to ata_piix.
2627 */
2628 pci_read_config_byte(pdev, ICH_MAP, &map);
2629 if (map & 0x3) {
2630 dev_printk(KERN_INFO, &pdev->dev, "controller is in "
2631 "combined mode, can't enable AHCI mode\n");
2632 return -ENODEV;
2633 }
2634 }
2635
2636 hpriv = devm_kzalloc(dev, sizeof(*hpriv), GFP_KERNEL);
2637 if (!hpriv)
2638 return -ENOMEM;
2639 hpriv->flags |= (unsigned long)pi.private_data;
2640
2641 /* MCP65 revision A1 and A2 can't do MSI */
2642 if (board_id == board_ahci_mcp65 &&
2643 (pdev->revision == 0xa1 || pdev->revision == 0xa2))
2644 hpriv->flags |= AHCI_HFLAG_NO_MSI;
2645
2646 /* SB800 does NOT need the workaround to ignore SERR_INTERNAL */
2647 if (board_id == board_ahci_sb700 && pdev->revision >= 0x40)
2648 hpriv->flags &= ~AHCI_HFLAG_IGN_SERR_INTERNAL;
2649
2650 if ((hpriv->flags & AHCI_HFLAG_NO_MSI) || pci_enable_msi(pdev))
2651 pci_intx(pdev, 1);
2652
2653 /* save initial config */
2654 ahci_save_initial_config(pdev, hpriv);
2655
2656 /* prepare host */
2657 if (hpriv->cap & HOST_CAP_NCQ)
2658 pi.flags |= ATA_FLAG_NCQ;
2659
2660 if (hpriv->cap & HOST_CAP_PMP)
2661 pi.flags |= ATA_FLAG_PMP;
2662
2663 if (ahci_em_messages && (hpriv->cap & HOST_CAP_EMS)) {
2664 u8 messages;
2665 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
2666 u32 em_loc = readl(mmio + HOST_EM_LOC);
2667 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2668
2669 messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16;
2670
2671 /* we only support LED message type right now */
2672 if ((messages & 0x01) && (ahci_em_messages == 1)) {
2673 /* store em_loc */
2674 hpriv->em_loc = ((em_loc >> 16) * 4);
2675 pi.flags |= ATA_FLAG_EM;
2676 if (!(em_ctl & EM_CTL_ALHD))
2677 pi.flags |= ATA_FLAG_SW_ACTIVITY;
2678 }
2679 }
2680
2681 if (ahci_broken_system_poweroff(pdev)) {
2682 pi.flags |= ATA_FLAG_NO_POWEROFF_SPINDOWN;
2683 dev_info(&pdev->dev,
2684 "quirky BIOS, skipping spindown on poweroff\n");
2685 }
2686
2687 /* CAP.NP sometimes indicate the index of the last enabled
2688 * port, at other times, that of the last possible port, so
2689 * determining the maximum port number requires looking at
2690 * both CAP.NP and port_map.
2691 */
2692 n_ports = max(ahci_nr_ports(hpriv->cap), fls(hpriv->port_map));
2693
2694 host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
2695 if (!host)
2696 return -ENOMEM;
2697 host->iomap = pcim_iomap_table(pdev);
2698 host->private_data = hpriv;
2699
2700 if (!(hpriv->cap & HOST_CAP_SSS) || ahci_ignore_sss)
2701 host->flags |= ATA_HOST_PARALLEL_SCAN;
2702 else
2703 printk(KERN_INFO "ahci: SSS flag set, parallel bus scan disabled\n");
2704
2705 if (pi.flags & ATA_FLAG_EM)
2706 ahci_reset_em(host);
2707
2708 for (i = 0; i < host->n_ports; i++) {
2709 struct ata_port *ap = host->ports[i];
2710
2711 ata_port_pbar_desc(ap, AHCI_PCI_BAR, -1, "abar");
2712 ata_port_pbar_desc(ap, AHCI_PCI_BAR,
2713 0x100 + ap->port_no * 0x80, "port");
2714
2715 /* set initial link pm policy */
2716 ap->pm_policy = NOT_AVAILABLE;
2717
2718 /* set enclosure management message type */
2719 if (ap->flags & ATA_FLAG_EM)
2720 ap->em_message_type = ahci_em_messages;
2721
2722
2723 /* disabled/not-implemented port */
2724 if (!(hpriv->port_map & (1 << i)))
2725 ap->ops = &ata_dummy_port_ops;
2726 }
2727
2728 /* apply workaround for ASUS P5W DH Deluxe mainboard */
2729 ahci_p5wdh_workaround(host);
2730
2731 /* initialize adapter */
2732 rc = ahci_configure_dma_masks(pdev, hpriv->cap & HOST_CAP_64);
2733 if (rc)
2734 return rc;
2735
2736 rc = ahci_reset_controller(host);
2737 if (rc)
2738 return rc;
2739
2740 ahci_init_controller(host);
2741 ahci_print_info(host);
2742
2743 pci_set_master(pdev);
2744 return ata_host_activate(host, pdev->irq, ahci_interrupt, IRQF_SHARED,
2745 &ahci_sht);
2746 }
2747
2748 static int __init ahci_init(void)
2749 {
2750 return pci_register_driver(&ahci_pci_driver);
2751 }
2752
2753 static void __exit ahci_exit(void)
2754 {
2755 pci_unregister_driver(&ahci_pci_driver);
2756 }
2757
2758
2759 MODULE_AUTHOR("Jeff Garzik");
2760 MODULE_DESCRIPTION("AHCI SATA low-level driver");
2761 MODULE_LICENSE("GPL");
2762 MODULE_DEVICE_TABLE(pci, ahci_pci_tbl);
2763 MODULE_VERSION(DRV_VERSION);
2764
2765 module_init(ahci_init);
2766 module_exit(ahci_exit);
Support for the Chinese Samsung S3C2440 based development boards