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365cfa1e AV |
1 | /* |
2 | * libahci.c - Common AHCI SATA low-level routines | |
3 | * | |
8c3d3d4b | 4 | * Maintained by: Tejun Heo <tj@kernel.org> |
365cfa1e AV |
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> | |
fbaf666b | 36 | #include <linux/gfp.h> |
365cfa1e AV |
37 | #include <linux/module.h> |
38 | #include <linux/init.h> | |
39 | #include <linux/blkdev.h> | |
40 | #include <linux/delay.h> | |
41 | #include <linux/interrupt.h> | |
42 | #include <linux/dma-mapping.h> | |
43 | #include <linux/device.h> | |
44 | #include <scsi/scsi_host.h> | |
45 | #include <scsi/scsi_cmnd.h> | |
46 | #include <linux/libata.h> | |
47 | #include "ahci.h" | |
65fe1f0f | 48 | #include "libata.h" |
365cfa1e AV |
49 | |
50 | static int ahci_skip_host_reset; | |
51 | int ahci_ignore_sss; | |
52 | EXPORT_SYMBOL_GPL(ahci_ignore_sss); | |
53 | ||
54 | module_param_named(skip_host_reset, ahci_skip_host_reset, int, 0444); | |
55 | MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)"); | |
56 | ||
57 | module_param_named(ignore_sss, ahci_ignore_sss, int, 0444); | |
58 | MODULE_PARM_DESC(ignore_sss, "Ignore staggered spinup flag (0=don't ignore, 1=ignore)"); | |
59 | ||
6b7ae954 TH |
60 | static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, |
61 | unsigned hints); | |
365cfa1e AV |
62 | static ssize_t ahci_led_show(struct ata_port *ap, char *buf); |
63 | static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, | |
64 | size_t size); | |
65 | static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, | |
66 | ssize_t size); | |
67 | ||
68 | ||
69 | ||
70 | static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val); | |
71 | static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val); | |
72 | static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc); | |
73 | static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc); | |
74 | static int ahci_port_start(struct ata_port *ap); | |
75 | static void ahci_port_stop(struct ata_port *ap); | |
76 | static void ahci_qc_prep(struct ata_queued_cmd *qc); | |
77 | static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc); | |
78 | static void ahci_freeze(struct ata_port *ap); | |
79 | static void ahci_thaw(struct ata_port *ap); | |
65fe1f0f | 80 | static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep); |
365cfa1e AV |
81 | static void ahci_enable_fbs(struct ata_port *ap); |
82 | static void ahci_disable_fbs(struct ata_port *ap); | |
83 | static void ahci_pmp_attach(struct ata_port *ap); | |
84 | static void ahci_pmp_detach(struct ata_port *ap); | |
85 | static int ahci_softreset(struct ata_link *link, unsigned int *class, | |
86 | unsigned long deadline); | |
345347c5 YHC |
87 | static int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, |
88 | unsigned long deadline); | |
365cfa1e AV |
89 | static int ahci_hardreset(struct ata_link *link, unsigned int *class, |
90 | unsigned long deadline); | |
91 | static void ahci_postreset(struct ata_link *link, unsigned int *class); | |
365cfa1e | 92 | static void ahci_post_internal_cmd(struct ata_queued_cmd *qc); |
365cfa1e | 93 | static void ahci_dev_config(struct ata_device *dev); |
365cfa1e AV |
94 | #ifdef CONFIG_PM |
95 | static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg); | |
96 | #endif | |
97 | static ssize_t ahci_activity_show(struct ata_device *dev, char *buf); | |
98 | static ssize_t ahci_activity_store(struct ata_device *dev, | |
99 | enum sw_activity val); | |
100 | static void ahci_init_sw_activity(struct ata_link *link); | |
101 | ||
102 | static ssize_t ahci_show_host_caps(struct device *dev, | |
103 | struct device_attribute *attr, char *buf); | |
104 | static ssize_t ahci_show_host_cap2(struct device *dev, | |
105 | struct device_attribute *attr, char *buf); | |
106 | static ssize_t ahci_show_host_version(struct device *dev, | |
107 | struct device_attribute *attr, char *buf); | |
108 | static ssize_t ahci_show_port_cmd(struct device *dev, | |
109 | struct device_attribute *attr, char *buf); | |
c0623166 HZ |
110 | static ssize_t ahci_read_em_buffer(struct device *dev, |
111 | struct device_attribute *attr, char *buf); | |
112 | static ssize_t ahci_store_em_buffer(struct device *dev, | |
113 | struct device_attribute *attr, | |
114 | const char *buf, size_t size); | |
6e5fe5b1 HR |
115 | static ssize_t ahci_show_em_supported(struct device *dev, |
116 | struct device_attribute *attr, char *buf); | |
365cfa1e AV |
117 | |
118 | static DEVICE_ATTR(ahci_host_caps, S_IRUGO, ahci_show_host_caps, NULL); | |
119 | static DEVICE_ATTR(ahci_host_cap2, S_IRUGO, ahci_show_host_cap2, NULL); | |
120 | static DEVICE_ATTR(ahci_host_version, S_IRUGO, ahci_show_host_version, NULL); | |
121 | static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL); | |
c0623166 HZ |
122 | static DEVICE_ATTR(em_buffer, S_IWUSR | S_IRUGO, |
123 | ahci_read_em_buffer, ahci_store_em_buffer); | |
6e5fe5b1 | 124 | static DEVICE_ATTR(em_message_supported, S_IRUGO, ahci_show_em_supported, NULL); |
365cfa1e | 125 | |
fad16e7a | 126 | struct device_attribute *ahci_shost_attrs[] = { |
365cfa1e AV |
127 | &dev_attr_link_power_management_policy, |
128 | &dev_attr_em_message_type, | |
129 | &dev_attr_em_message, | |
130 | &dev_attr_ahci_host_caps, | |
131 | &dev_attr_ahci_host_cap2, | |
132 | &dev_attr_ahci_host_version, | |
133 | &dev_attr_ahci_port_cmd, | |
c0623166 | 134 | &dev_attr_em_buffer, |
6e5fe5b1 | 135 | &dev_attr_em_message_supported, |
365cfa1e AV |
136 | NULL |
137 | }; | |
fad16e7a | 138 | EXPORT_SYMBOL_GPL(ahci_shost_attrs); |
365cfa1e | 139 | |
fad16e7a | 140 | struct device_attribute *ahci_sdev_attrs[] = { |
365cfa1e AV |
141 | &dev_attr_sw_activity, |
142 | &dev_attr_unload_heads, | |
143 | NULL | |
144 | }; | |
fad16e7a | 145 | EXPORT_SYMBOL_GPL(ahci_sdev_attrs); |
365cfa1e AV |
146 | |
147 | struct ata_port_operations ahci_ops = { | |
148 | .inherits = &sata_pmp_port_ops, | |
149 | ||
150 | .qc_defer = ahci_pmp_qc_defer, | |
151 | .qc_prep = ahci_qc_prep, | |
152 | .qc_issue = ahci_qc_issue, | |
153 | .qc_fill_rtf = ahci_qc_fill_rtf, | |
154 | ||
155 | .freeze = ahci_freeze, | |
156 | .thaw = ahci_thaw, | |
157 | .softreset = ahci_softreset, | |
158 | .hardreset = ahci_hardreset, | |
159 | .postreset = ahci_postreset, | |
160 | .pmp_softreset = ahci_softreset, | |
161 | .error_handler = ahci_error_handler, | |
162 | .post_internal_cmd = ahci_post_internal_cmd, | |
163 | .dev_config = ahci_dev_config, | |
164 | ||
165 | .scr_read = ahci_scr_read, | |
166 | .scr_write = ahci_scr_write, | |
167 | .pmp_attach = ahci_pmp_attach, | |
168 | .pmp_detach = ahci_pmp_detach, | |
169 | ||
6b7ae954 | 170 | .set_lpm = ahci_set_lpm, |
365cfa1e AV |
171 | .em_show = ahci_led_show, |
172 | .em_store = ahci_led_store, | |
173 | .sw_activity_show = ahci_activity_show, | |
174 | .sw_activity_store = ahci_activity_store, | |
439d7a35 | 175 | .transmit_led_message = ahci_transmit_led_message, |
365cfa1e AV |
176 | #ifdef CONFIG_PM |
177 | .port_suspend = ahci_port_suspend, | |
178 | .port_resume = ahci_port_resume, | |
179 | #endif | |
180 | .port_start = ahci_port_start, | |
181 | .port_stop = ahci_port_stop, | |
182 | }; | |
183 | EXPORT_SYMBOL_GPL(ahci_ops); | |
184 | ||
345347c5 YHC |
185 | struct ata_port_operations ahci_pmp_retry_srst_ops = { |
186 | .inherits = &ahci_ops, | |
187 | .softreset = ahci_pmp_retry_softreset, | |
188 | }; | |
189 | EXPORT_SYMBOL_GPL(ahci_pmp_retry_srst_ops); | |
190 | ||
ed08d40c | 191 | static bool ahci_em_messages __read_mostly = true; |
365cfa1e | 192 | EXPORT_SYMBOL_GPL(ahci_em_messages); |
ed08d40c | 193 | module_param(ahci_em_messages, bool, 0444); |
365cfa1e AV |
194 | /* add other LED protocol types when they become supported */ |
195 | MODULE_PARM_DESC(ahci_em_messages, | |
008dbd61 | 196 | "AHCI Enclosure Management Message control (0 = off, 1 = on)"); |
365cfa1e | 197 | |
ed08d40c CL |
198 | /* device sleep idle timeout in ms */ |
199 | static int devslp_idle_timeout __read_mostly = 1000; | |
65fe1f0f SH |
200 | module_param(devslp_idle_timeout, int, 0644); |
201 | MODULE_PARM_DESC(devslp_idle_timeout, "device sleep idle timeout"); | |
202 | ||
365cfa1e AV |
203 | static void ahci_enable_ahci(void __iomem *mmio) |
204 | { | |
205 | int i; | |
206 | u32 tmp; | |
207 | ||
208 | /* turn on AHCI_EN */ | |
209 | tmp = readl(mmio + HOST_CTL); | |
210 | if (tmp & HOST_AHCI_EN) | |
211 | return; | |
212 | ||
213 | /* Some controllers need AHCI_EN to be written multiple times. | |
214 | * Try a few times before giving up. | |
215 | */ | |
216 | for (i = 0; i < 5; i++) { | |
217 | tmp |= HOST_AHCI_EN; | |
218 | writel(tmp, mmio + HOST_CTL); | |
219 | tmp = readl(mmio + HOST_CTL); /* flush && sanity check */ | |
220 | if (tmp & HOST_AHCI_EN) | |
221 | return; | |
222 | msleep(10); | |
223 | } | |
224 | ||
225 | WARN_ON(1); | |
226 | } | |
227 | ||
228 | static ssize_t ahci_show_host_caps(struct device *dev, | |
229 | struct device_attribute *attr, char *buf) | |
230 | { | |
231 | struct Scsi_Host *shost = class_to_shost(dev); | |
232 | struct ata_port *ap = ata_shost_to_port(shost); | |
233 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
234 | ||
235 | return sprintf(buf, "%x\n", hpriv->cap); | |
236 | } | |
237 | ||
238 | static ssize_t ahci_show_host_cap2(struct device *dev, | |
239 | struct device_attribute *attr, char *buf) | |
240 | { | |
241 | struct Scsi_Host *shost = class_to_shost(dev); | |
242 | struct ata_port *ap = ata_shost_to_port(shost); | |
243 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
244 | ||
245 | return sprintf(buf, "%x\n", hpriv->cap2); | |
246 | } | |
247 | ||
248 | static ssize_t ahci_show_host_version(struct device *dev, | |
249 | struct device_attribute *attr, char *buf) | |
250 | { | |
251 | struct Scsi_Host *shost = class_to_shost(dev); | |
252 | struct ata_port *ap = ata_shost_to_port(shost); | |
253 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
254 | void __iomem *mmio = hpriv->mmio; | |
255 | ||
256 | return sprintf(buf, "%x\n", readl(mmio + HOST_VERSION)); | |
257 | } | |
258 | ||
259 | static ssize_t ahci_show_port_cmd(struct device *dev, | |
260 | struct device_attribute *attr, char *buf) | |
261 | { | |
262 | struct Scsi_Host *shost = class_to_shost(dev); | |
263 | struct ata_port *ap = ata_shost_to_port(shost); | |
264 | void __iomem *port_mmio = ahci_port_base(ap); | |
265 | ||
266 | return sprintf(buf, "%x\n", readl(port_mmio + PORT_CMD)); | |
267 | } | |
268 | ||
c0623166 HZ |
269 | static ssize_t ahci_read_em_buffer(struct device *dev, |
270 | struct device_attribute *attr, char *buf) | |
271 | { | |
272 | struct Scsi_Host *shost = class_to_shost(dev); | |
273 | struct ata_port *ap = ata_shost_to_port(shost); | |
274 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
275 | void __iomem *mmio = hpriv->mmio; | |
276 | void __iomem *em_mmio = mmio + hpriv->em_loc; | |
277 | u32 em_ctl, msg; | |
278 | unsigned long flags; | |
279 | size_t count; | |
280 | int i; | |
281 | ||
282 | spin_lock_irqsave(ap->lock, flags); | |
283 | ||
284 | em_ctl = readl(mmio + HOST_EM_CTL); | |
285 | if (!(ap->flags & ATA_FLAG_EM) || em_ctl & EM_CTL_XMT || | |
286 | !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO)) { | |
287 | spin_unlock_irqrestore(ap->lock, flags); | |
288 | return -EINVAL; | |
289 | } | |
290 | ||
291 | if (!(em_ctl & EM_CTL_MR)) { | |
292 | spin_unlock_irqrestore(ap->lock, flags); | |
293 | return -EAGAIN; | |
294 | } | |
295 | ||
296 | if (!(em_ctl & EM_CTL_SMB)) | |
297 | em_mmio += hpriv->em_buf_sz; | |
298 | ||
299 | count = hpriv->em_buf_sz; | |
300 | ||
301 | /* the count should not be larger than PAGE_SIZE */ | |
302 | if (count > PAGE_SIZE) { | |
303 | if (printk_ratelimit()) | |
a9a79dfe JP |
304 | ata_port_warn(ap, |
305 | "EM read buffer size too large: " | |
306 | "buffer size %u, page size %lu\n", | |
307 | hpriv->em_buf_sz, PAGE_SIZE); | |
c0623166 HZ |
308 | count = PAGE_SIZE; |
309 | } | |
310 | ||
311 | for (i = 0; i < count; i += 4) { | |
312 | msg = readl(em_mmio + i); | |
313 | buf[i] = msg & 0xff; | |
314 | buf[i + 1] = (msg >> 8) & 0xff; | |
315 | buf[i + 2] = (msg >> 16) & 0xff; | |
316 | buf[i + 3] = (msg >> 24) & 0xff; | |
317 | } | |
318 | ||
319 | spin_unlock_irqrestore(ap->lock, flags); | |
320 | ||
321 | return i; | |
322 | } | |
323 | ||
324 | static ssize_t ahci_store_em_buffer(struct device *dev, | |
325 | struct device_attribute *attr, | |
326 | const char *buf, size_t size) | |
327 | { | |
328 | struct Scsi_Host *shost = class_to_shost(dev); | |
329 | struct ata_port *ap = ata_shost_to_port(shost); | |
330 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
331 | void __iomem *mmio = hpriv->mmio; | |
332 | void __iomem *em_mmio = mmio + hpriv->em_loc; | |
f9ce889b | 333 | const unsigned char *msg_buf = buf; |
c0623166 HZ |
334 | u32 em_ctl, msg; |
335 | unsigned long flags; | |
336 | int i; | |
337 | ||
338 | /* check size validity */ | |
339 | if (!(ap->flags & ATA_FLAG_EM) || | |
340 | !(hpriv->em_msg_type & EM_MSG_TYPE_SGPIO) || | |
341 | size % 4 || size > hpriv->em_buf_sz) | |
342 | return -EINVAL; | |
343 | ||
344 | spin_lock_irqsave(ap->lock, flags); | |
345 | ||
346 | em_ctl = readl(mmio + HOST_EM_CTL); | |
347 | if (em_ctl & EM_CTL_TM) { | |
348 | spin_unlock_irqrestore(ap->lock, flags); | |
349 | return -EBUSY; | |
350 | } | |
351 | ||
352 | for (i = 0; i < size; i += 4) { | |
f9ce889b HZ |
353 | msg = msg_buf[i] | msg_buf[i + 1] << 8 | |
354 | msg_buf[i + 2] << 16 | msg_buf[i + 3] << 24; | |
c0623166 HZ |
355 | writel(msg, em_mmio + i); |
356 | } | |
357 | ||
358 | writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); | |
359 | ||
360 | spin_unlock_irqrestore(ap->lock, flags); | |
361 | ||
362 | return size; | |
363 | } | |
364 | ||
6e5fe5b1 HR |
365 | static ssize_t ahci_show_em_supported(struct device *dev, |
366 | struct device_attribute *attr, char *buf) | |
367 | { | |
368 | struct Scsi_Host *shost = class_to_shost(dev); | |
369 | struct ata_port *ap = ata_shost_to_port(shost); | |
370 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
371 | void __iomem *mmio = hpriv->mmio; | |
372 | u32 em_ctl; | |
373 | ||
374 | em_ctl = readl(mmio + HOST_EM_CTL); | |
375 | ||
376 | return sprintf(buf, "%s%s%s%s\n", | |
377 | em_ctl & EM_CTL_LED ? "led " : "", | |
378 | em_ctl & EM_CTL_SAFTE ? "saf-te " : "", | |
379 | em_ctl & EM_CTL_SES ? "ses-2 " : "", | |
380 | em_ctl & EM_CTL_SGPIO ? "sgpio " : ""); | |
381 | } | |
382 | ||
365cfa1e AV |
383 | /** |
384 | * ahci_save_initial_config - Save and fixup initial config values | |
385 | * @dev: target AHCI device | |
386 | * @hpriv: host private area to store config values | |
387 | * @force_port_map: force port map to a specified value | |
388 | * @mask_port_map: mask out particular bits from port map | |
389 | * | |
390 | * Some registers containing configuration info might be setup by | |
391 | * BIOS and might be cleared on reset. This function saves the | |
392 | * initial values of those registers into @hpriv such that they | |
393 | * can be restored after controller reset. | |
394 | * | |
395 | * If inconsistent, config values are fixed up by this function. | |
396 | * | |
397 | * LOCKING: | |
398 | * None. | |
399 | */ | |
400 | void ahci_save_initial_config(struct device *dev, | |
401 | struct ahci_host_priv *hpriv, | |
402 | unsigned int force_port_map, | |
403 | unsigned int mask_port_map) | |
404 | { | |
405 | void __iomem *mmio = hpriv->mmio; | |
406 | u32 cap, cap2, vers, port_map; | |
407 | int i; | |
408 | ||
409 | /* make sure AHCI mode is enabled before accessing CAP */ | |
410 | ahci_enable_ahci(mmio); | |
411 | ||
412 | /* Values prefixed with saved_ are written back to host after | |
413 | * reset. Values without are used for driver operation. | |
414 | */ | |
415 | hpriv->saved_cap = cap = readl(mmio + HOST_CAP); | |
416 | hpriv->saved_port_map = port_map = readl(mmio + HOST_PORTS_IMPL); | |
417 | ||
418 | /* CAP2 register is only defined for AHCI 1.2 and later */ | |
419 | vers = readl(mmio + HOST_VERSION); | |
420 | if ((vers >> 16) > 1 || | |
421 | ((vers >> 16) == 1 && (vers & 0xFFFF) >= 0x200)) | |
422 | hpriv->saved_cap2 = cap2 = readl(mmio + HOST_CAP2); | |
423 | else | |
424 | hpriv->saved_cap2 = cap2 = 0; | |
425 | ||
426 | /* some chips have errata preventing 64bit use */ | |
427 | if ((cap & HOST_CAP_64) && (hpriv->flags & AHCI_HFLAG_32BIT_ONLY)) { | |
a44fec1f | 428 | dev_info(dev, "controller can't do 64bit DMA, forcing 32bit\n"); |
365cfa1e AV |
429 | cap &= ~HOST_CAP_64; |
430 | } | |
431 | ||
432 | if ((cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_NO_NCQ)) { | |
a44fec1f | 433 | dev_info(dev, "controller can't do NCQ, turning off CAP_NCQ\n"); |
365cfa1e AV |
434 | cap &= ~HOST_CAP_NCQ; |
435 | } | |
436 | ||
437 | if (!(cap & HOST_CAP_NCQ) && (hpriv->flags & AHCI_HFLAG_YES_NCQ)) { | |
a44fec1f | 438 | dev_info(dev, "controller can do NCQ, turning on CAP_NCQ\n"); |
365cfa1e AV |
439 | cap |= HOST_CAP_NCQ; |
440 | } | |
441 | ||
442 | if ((cap & HOST_CAP_PMP) && (hpriv->flags & AHCI_HFLAG_NO_PMP)) { | |
a44fec1f | 443 | dev_info(dev, "controller can't do PMP, turning off CAP_PMP\n"); |
365cfa1e AV |
444 | cap &= ~HOST_CAP_PMP; |
445 | } | |
446 | ||
447 | if ((cap & HOST_CAP_SNTF) && (hpriv->flags & AHCI_HFLAG_NO_SNTF)) { | |
a44fec1f JP |
448 | dev_info(dev, |
449 | "controller can't do SNTF, turning off CAP_SNTF\n"); | |
365cfa1e AV |
450 | cap &= ~HOST_CAP_SNTF; |
451 | } | |
452 | ||
5f173107 | 453 | if (!(cap & HOST_CAP_FBS) && (hpriv->flags & AHCI_HFLAG_YES_FBS)) { |
a44fec1f | 454 | dev_info(dev, "controller can do FBS, turning on CAP_FBS\n"); |
5f173107 TH |
455 | cap |= HOST_CAP_FBS; |
456 | } | |
457 | ||
365cfa1e | 458 | if (force_port_map && port_map != force_port_map) { |
a44fec1f JP |
459 | dev_info(dev, "forcing port_map 0x%x -> 0x%x\n", |
460 | port_map, force_port_map); | |
365cfa1e AV |
461 | port_map = force_port_map; |
462 | } | |
463 | ||
464 | if (mask_port_map) { | |
a44fec1f JP |
465 | dev_warn(dev, "masking port_map 0x%x -> 0x%x\n", |
466 | port_map, | |
467 | port_map & mask_port_map); | |
365cfa1e AV |
468 | port_map &= mask_port_map; |
469 | } | |
470 | ||
471 | /* cross check port_map and cap.n_ports */ | |
472 | if (port_map) { | |
473 | int map_ports = 0; | |
474 | ||
475 | for (i = 0; i < AHCI_MAX_PORTS; i++) | |
476 | if (port_map & (1 << i)) | |
477 | map_ports++; | |
478 | ||
479 | /* If PI has more ports than n_ports, whine, clear | |
480 | * port_map and let it be generated from n_ports. | |
481 | */ | |
482 | if (map_ports > ahci_nr_ports(cap)) { | |
a44fec1f JP |
483 | dev_warn(dev, |
484 | "implemented port map (0x%x) contains more ports than nr_ports (%u), using nr_ports\n", | |
485 | port_map, ahci_nr_ports(cap)); | |
365cfa1e AV |
486 | port_map = 0; |
487 | } | |
488 | } | |
489 | ||
490 | /* fabricate port_map from cap.nr_ports */ | |
491 | if (!port_map) { | |
492 | port_map = (1 << ahci_nr_ports(cap)) - 1; | |
a44fec1f | 493 | dev_warn(dev, "forcing PORTS_IMPL to 0x%x\n", port_map); |
365cfa1e AV |
494 | |
495 | /* write the fixed up value to the PI register */ | |
496 | hpriv->saved_port_map = port_map; | |
497 | } | |
498 | ||
499 | /* record values to use during operation */ | |
500 | hpriv->cap = cap; | |
501 | hpriv->cap2 = cap2; | |
502 | hpriv->port_map = port_map; | |
503 | } | |
504 | EXPORT_SYMBOL_GPL(ahci_save_initial_config); | |
505 | ||
506 | /** | |
507 | * ahci_restore_initial_config - Restore initial config | |
508 | * @host: target ATA host | |
509 | * | |
510 | * Restore initial config stored by ahci_save_initial_config(). | |
511 | * | |
512 | * LOCKING: | |
513 | * None. | |
514 | */ | |
515 | static void ahci_restore_initial_config(struct ata_host *host) | |
516 | { | |
517 | struct ahci_host_priv *hpriv = host->private_data; | |
518 | void __iomem *mmio = hpriv->mmio; | |
519 | ||
520 | writel(hpriv->saved_cap, mmio + HOST_CAP); | |
521 | if (hpriv->saved_cap2) | |
522 | writel(hpriv->saved_cap2, mmio + HOST_CAP2); | |
523 | writel(hpriv->saved_port_map, mmio + HOST_PORTS_IMPL); | |
524 | (void) readl(mmio + HOST_PORTS_IMPL); /* flush */ | |
525 | } | |
526 | ||
527 | static unsigned ahci_scr_offset(struct ata_port *ap, unsigned int sc_reg) | |
528 | { | |
529 | static const int offset[] = { | |
530 | [SCR_STATUS] = PORT_SCR_STAT, | |
531 | [SCR_CONTROL] = PORT_SCR_CTL, | |
532 | [SCR_ERROR] = PORT_SCR_ERR, | |
533 | [SCR_ACTIVE] = PORT_SCR_ACT, | |
534 | [SCR_NOTIFICATION] = PORT_SCR_NTF, | |
535 | }; | |
536 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
537 | ||
538 | if (sc_reg < ARRAY_SIZE(offset) && | |
539 | (sc_reg != SCR_NOTIFICATION || (hpriv->cap & HOST_CAP_SNTF))) | |
540 | return offset[sc_reg]; | |
541 | return 0; | |
542 | } | |
543 | ||
544 | static int ahci_scr_read(struct ata_link *link, unsigned int sc_reg, u32 *val) | |
545 | { | |
546 | void __iomem *port_mmio = ahci_port_base(link->ap); | |
547 | int offset = ahci_scr_offset(link->ap, sc_reg); | |
548 | ||
549 | if (offset) { | |
550 | *val = readl(port_mmio + offset); | |
551 | return 0; | |
552 | } | |
553 | return -EINVAL; | |
554 | } | |
555 | ||
556 | static int ahci_scr_write(struct ata_link *link, unsigned int sc_reg, u32 val) | |
557 | { | |
558 | void __iomem *port_mmio = ahci_port_base(link->ap); | |
559 | int offset = ahci_scr_offset(link->ap, sc_reg); | |
560 | ||
561 | if (offset) { | |
562 | writel(val, port_mmio + offset); | |
563 | return 0; | |
564 | } | |
565 | return -EINVAL; | |
566 | } | |
567 | ||
568 | void ahci_start_engine(struct ata_port *ap) | |
569 | { | |
570 | void __iomem *port_mmio = ahci_port_base(ap); | |
571 | u32 tmp; | |
572 | ||
573 | /* start DMA */ | |
574 | tmp = readl(port_mmio + PORT_CMD); | |
575 | tmp |= PORT_CMD_START; | |
576 | writel(tmp, port_mmio + PORT_CMD); | |
577 | readl(port_mmio + PORT_CMD); /* flush */ | |
578 | } | |
579 | EXPORT_SYMBOL_GPL(ahci_start_engine); | |
580 | ||
581 | int ahci_stop_engine(struct ata_port *ap) | |
582 | { | |
583 | void __iomem *port_mmio = ahci_port_base(ap); | |
584 | u32 tmp; | |
585 | ||
586 | tmp = readl(port_mmio + PORT_CMD); | |
587 | ||
588 | /* check if the HBA is idle */ | |
589 | if ((tmp & (PORT_CMD_START | PORT_CMD_LIST_ON)) == 0) | |
590 | return 0; | |
591 | ||
592 | /* setting HBA to idle */ | |
593 | tmp &= ~PORT_CMD_START; | |
594 | writel(tmp, port_mmio + PORT_CMD); | |
595 | ||
596 | /* wait for engine to stop. This could be as long as 500 msec */ | |
97750ceb | 597 | tmp = ata_wait_register(ap, port_mmio + PORT_CMD, |
365cfa1e AV |
598 | PORT_CMD_LIST_ON, PORT_CMD_LIST_ON, 1, 500); |
599 | if (tmp & PORT_CMD_LIST_ON) | |
600 | return -EIO; | |
601 | ||
602 | return 0; | |
603 | } | |
604 | EXPORT_SYMBOL_GPL(ahci_stop_engine); | |
605 | ||
606 | static void ahci_start_fis_rx(struct ata_port *ap) | |
607 | { | |
608 | void __iomem *port_mmio = ahci_port_base(ap); | |
609 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
610 | struct ahci_port_priv *pp = ap->private_data; | |
611 | u32 tmp; | |
612 | ||
613 | /* set FIS registers */ | |
614 | if (hpriv->cap & HOST_CAP_64) | |
615 | writel((pp->cmd_slot_dma >> 16) >> 16, | |
616 | port_mmio + PORT_LST_ADDR_HI); | |
617 | writel(pp->cmd_slot_dma & 0xffffffff, port_mmio + PORT_LST_ADDR); | |
618 | ||
619 | if (hpriv->cap & HOST_CAP_64) | |
620 | writel((pp->rx_fis_dma >> 16) >> 16, | |
621 | port_mmio + PORT_FIS_ADDR_HI); | |
622 | writel(pp->rx_fis_dma & 0xffffffff, port_mmio + PORT_FIS_ADDR); | |
623 | ||
624 | /* enable FIS reception */ | |
625 | tmp = readl(port_mmio + PORT_CMD); | |
626 | tmp |= PORT_CMD_FIS_RX; | |
627 | writel(tmp, port_mmio + PORT_CMD); | |
628 | ||
629 | /* flush */ | |
630 | readl(port_mmio + PORT_CMD); | |
631 | } | |
632 | ||
633 | static int ahci_stop_fis_rx(struct ata_port *ap) | |
634 | { | |
635 | void __iomem *port_mmio = ahci_port_base(ap); | |
636 | u32 tmp; | |
637 | ||
638 | /* disable FIS reception */ | |
639 | tmp = readl(port_mmio + PORT_CMD); | |
640 | tmp &= ~PORT_CMD_FIS_RX; | |
641 | writel(tmp, port_mmio + PORT_CMD); | |
642 | ||
643 | /* wait for completion, spec says 500ms, give it 1000 */ | |
97750ceb | 644 | tmp = ata_wait_register(ap, port_mmio + PORT_CMD, PORT_CMD_FIS_ON, |
365cfa1e AV |
645 | PORT_CMD_FIS_ON, 10, 1000); |
646 | if (tmp & PORT_CMD_FIS_ON) | |
647 | return -EBUSY; | |
648 | ||
649 | return 0; | |
650 | } | |
651 | ||
652 | static void ahci_power_up(struct ata_port *ap) | |
653 | { | |
654 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
655 | void __iomem *port_mmio = ahci_port_base(ap); | |
656 | u32 cmd; | |
657 | ||
658 | cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; | |
659 | ||
660 | /* spin up device */ | |
661 | if (hpriv->cap & HOST_CAP_SSS) { | |
662 | cmd |= PORT_CMD_SPIN_UP; | |
663 | writel(cmd, port_mmio + PORT_CMD); | |
664 | } | |
665 | ||
666 | /* wake up link */ | |
667 | writel(cmd | PORT_CMD_ICC_ACTIVE, port_mmio + PORT_CMD); | |
668 | } | |
669 | ||
6b7ae954 TH |
670 | static int ahci_set_lpm(struct ata_link *link, enum ata_lpm_policy policy, |
671 | unsigned int hints) | |
365cfa1e | 672 | { |
6b7ae954 | 673 | struct ata_port *ap = link->ap; |
365cfa1e | 674 | struct ahci_host_priv *hpriv = ap->host->private_data; |
365cfa1e | 675 | struct ahci_port_priv *pp = ap->private_data; |
365cfa1e | 676 | void __iomem *port_mmio = ahci_port_base(ap); |
365cfa1e | 677 | |
6b7ae954 | 678 | if (policy != ATA_LPM_MAX_POWER) { |
365cfa1e | 679 | /* |
6b7ae954 TH |
680 | * Disable interrupts on Phy Ready. This keeps us from |
681 | * getting woken up due to spurious phy ready | |
682 | * interrupts. | |
365cfa1e | 683 | */ |
6b7ae954 TH |
684 | pp->intr_mask &= ~PORT_IRQ_PHYRDY; |
685 | writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); | |
686 | ||
687 | sata_link_scr_lpm(link, policy, false); | |
365cfa1e AV |
688 | } |
689 | ||
6b7ae954 TH |
690 | if (hpriv->cap & HOST_CAP_ALPM) { |
691 | u32 cmd = readl(port_mmio + PORT_CMD); | |
365cfa1e | 692 | |
6b7ae954 TH |
693 | if (policy == ATA_LPM_MAX_POWER || !(hints & ATA_LPM_HIPM)) { |
694 | cmd &= ~(PORT_CMD_ASP | PORT_CMD_ALPE); | |
695 | cmd |= PORT_CMD_ICC_ACTIVE; | |
365cfa1e | 696 | |
6b7ae954 TH |
697 | writel(cmd, port_mmio + PORT_CMD); |
698 | readl(port_mmio + PORT_CMD); | |
365cfa1e | 699 | |
6b7ae954 | 700 | /* wait 10ms to be sure we've come out of LPM state */ |
97750ceb | 701 | ata_msleep(ap, 10); |
6b7ae954 TH |
702 | } else { |
703 | cmd |= PORT_CMD_ALPE; | |
704 | if (policy == ATA_LPM_MIN_POWER) | |
705 | cmd |= PORT_CMD_ASP; | |
365cfa1e | 706 | |
6b7ae954 TH |
707 | /* write out new cmd value */ |
708 | writel(cmd, port_mmio + PORT_CMD); | |
709 | } | |
710 | } | |
365cfa1e | 711 | |
65fe1f0f SH |
712 | /* set aggressive device sleep */ |
713 | if ((hpriv->cap2 & HOST_CAP2_SDS) && | |
714 | (hpriv->cap2 & HOST_CAP2_SADM) && | |
715 | (link->device->flags & ATA_DFLAG_DEVSLP)) { | |
716 | if (policy == ATA_LPM_MIN_POWER) | |
717 | ahci_set_aggressive_devslp(ap, true); | |
718 | else | |
719 | ahci_set_aggressive_devslp(ap, false); | |
720 | } | |
721 | ||
6b7ae954 TH |
722 | if (policy == ATA_LPM_MAX_POWER) { |
723 | sata_link_scr_lpm(link, policy, false); | |
724 | ||
725 | /* turn PHYRDY IRQ back on */ | |
726 | pp->intr_mask |= PORT_IRQ_PHYRDY; | |
727 | writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); | |
728 | } | |
365cfa1e | 729 | |
365cfa1e AV |
730 | return 0; |
731 | } | |
732 | ||
733 | #ifdef CONFIG_PM | |
734 | static void ahci_power_down(struct ata_port *ap) | |
735 | { | |
736 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
737 | void __iomem *port_mmio = ahci_port_base(ap); | |
738 | u32 cmd, scontrol; | |
739 | ||
740 | if (!(hpriv->cap & HOST_CAP_SSS)) | |
741 | return; | |
742 | ||
743 | /* put device into listen mode, first set PxSCTL.DET to 0 */ | |
744 | scontrol = readl(port_mmio + PORT_SCR_CTL); | |
745 | scontrol &= ~0xf; | |
746 | writel(scontrol, port_mmio + PORT_SCR_CTL); | |
747 | ||
748 | /* then set PxCMD.SUD to 0 */ | |
749 | cmd = readl(port_mmio + PORT_CMD) & ~PORT_CMD_ICC_MASK; | |
750 | cmd &= ~PORT_CMD_SPIN_UP; | |
751 | writel(cmd, port_mmio + PORT_CMD); | |
752 | } | |
753 | #endif | |
754 | ||
755 | static void ahci_start_port(struct ata_port *ap) | |
756 | { | |
66583c9f | 757 | struct ahci_host_priv *hpriv = ap->host->private_data; |
365cfa1e AV |
758 | struct ahci_port_priv *pp = ap->private_data; |
759 | struct ata_link *link; | |
760 | struct ahci_em_priv *emp; | |
761 | ssize_t rc; | |
762 | int i; | |
763 | ||
764 | /* enable FIS reception */ | |
765 | ahci_start_fis_rx(ap); | |
766 | ||
66583c9f BN |
767 | /* enable DMA */ |
768 | if (!(hpriv->flags & AHCI_HFLAG_DELAY_ENGINE)) | |
769 | ahci_start_engine(ap); | |
770 | ||
365cfa1e AV |
771 | /* turn on LEDs */ |
772 | if (ap->flags & ATA_FLAG_EM) { | |
773 | ata_for_each_link(link, ap, EDGE) { | |
774 | emp = &pp->em_priv[link->pmp]; | |
775 | ||
776 | /* EM Transmit bit maybe busy during init */ | |
777 | for (i = 0; i < EM_MAX_RETRY; i++) { | |
439d7a35 | 778 | rc = ap->ops->transmit_led_message(ap, |
365cfa1e AV |
779 | emp->led_state, |
780 | 4); | |
fa070ee6 LD |
781 | /* |
782 | * If busy, give a breather but do not | |
783 | * release EH ownership by using msleep() | |
784 | * instead of ata_msleep(). EM Transmit | |
785 | * bit is busy for the whole host and | |
786 | * releasing ownership will cause other | |
787 | * ports to fail the same way. | |
788 | */ | |
365cfa1e | 789 | if (rc == -EBUSY) |
fa070ee6 | 790 | msleep(1); |
365cfa1e AV |
791 | else |
792 | break; | |
793 | } | |
794 | } | |
795 | } | |
796 | ||
797 | if (ap->flags & ATA_FLAG_SW_ACTIVITY) | |
798 | ata_for_each_link(link, ap, EDGE) | |
799 | ahci_init_sw_activity(link); | |
800 | ||
801 | } | |
802 | ||
803 | static int ahci_deinit_port(struct ata_port *ap, const char **emsg) | |
804 | { | |
805 | int rc; | |
806 | ||
807 | /* disable DMA */ | |
808 | rc = ahci_stop_engine(ap); | |
809 | if (rc) { | |
810 | *emsg = "failed to stop engine"; | |
811 | return rc; | |
812 | } | |
813 | ||
814 | /* disable FIS reception */ | |
815 | rc = ahci_stop_fis_rx(ap); | |
816 | if (rc) { | |
817 | *emsg = "failed stop FIS RX"; | |
818 | return rc; | |
819 | } | |
820 | ||
821 | return 0; | |
822 | } | |
823 | ||
824 | int ahci_reset_controller(struct ata_host *host) | |
825 | { | |
826 | struct ahci_host_priv *hpriv = host->private_data; | |
827 | void __iomem *mmio = hpriv->mmio; | |
828 | u32 tmp; | |
829 | ||
830 | /* we must be in AHCI mode, before using anything | |
831 | * AHCI-specific, such as HOST_RESET. | |
832 | */ | |
833 | ahci_enable_ahci(mmio); | |
834 | ||
835 | /* global controller reset */ | |
836 | if (!ahci_skip_host_reset) { | |
837 | tmp = readl(mmio + HOST_CTL); | |
838 | if ((tmp & HOST_RESET) == 0) { | |
839 | writel(tmp | HOST_RESET, mmio + HOST_CTL); | |
840 | readl(mmio + HOST_CTL); /* flush */ | |
841 | } | |
842 | ||
843 | /* | |
844 | * to perform host reset, OS should set HOST_RESET | |
845 | * and poll until this bit is read to be "0". | |
846 | * reset must complete within 1 second, or | |
847 | * the hardware should be considered fried. | |
848 | */ | |
97750ceb | 849 | tmp = ata_wait_register(NULL, mmio + HOST_CTL, HOST_RESET, |
365cfa1e AV |
850 | HOST_RESET, 10, 1000); |
851 | ||
852 | if (tmp & HOST_RESET) { | |
a44fec1f JP |
853 | dev_err(host->dev, "controller reset failed (0x%x)\n", |
854 | tmp); | |
365cfa1e AV |
855 | return -EIO; |
856 | } | |
857 | ||
858 | /* turn on AHCI mode */ | |
859 | ahci_enable_ahci(mmio); | |
860 | ||
861 | /* Some registers might be cleared on reset. Restore | |
862 | * initial values. | |
863 | */ | |
864 | ahci_restore_initial_config(host); | |
865 | } else | |
a44fec1f | 866 | dev_info(host->dev, "skipping global host reset\n"); |
365cfa1e AV |
867 | |
868 | return 0; | |
869 | } | |
870 | EXPORT_SYMBOL_GPL(ahci_reset_controller); | |
871 | ||
872 | static void ahci_sw_activity(struct ata_link *link) | |
873 | { | |
874 | struct ata_port *ap = link->ap; | |
875 | struct ahci_port_priv *pp = ap->private_data; | |
876 | struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; | |
877 | ||
878 | if (!(link->flags & ATA_LFLAG_SW_ACTIVITY)) | |
879 | return; | |
880 | ||
881 | emp->activity++; | |
882 | if (!timer_pending(&emp->timer)) | |
883 | mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10)); | |
884 | } | |
885 | ||
886 | static void ahci_sw_activity_blink(unsigned long arg) | |
887 | { | |
888 | struct ata_link *link = (struct ata_link *)arg; | |
889 | struct ata_port *ap = link->ap; | |
890 | struct ahci_port_priv *pp = ap->private_data; | |
891 | struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; | |
892 | unsigned long led_message = emp->led_state; | |
893 | u32 activity_led_state; | |
894 | unsigned long flags; | |
895 | ||
896 | led_message &= EM_MSG_LED_VALUE; | |
897 | led_message |= ap->port_no | (link->pmp << 8); | |
898 | ||
899 | /* check to see if we've had activity. If so, | |
900 | * toggle state of LED and reset timer. If not, | |
901 | * turn LED to desired idle state. | |
902 | */ | |
903 | spin_lock_irqsave(ap->lock, flags); | |
904 | if (emp->saved_activity != emp->activity) { | |
905 | emp->saved_activity = emp->activity; | |
906 | /* get the current LED state */ | |
907 | activity_led_state = led_message & EM_MSG_LED_VALUE_ON; | |
908 | ||
909 | if (activity_led_state) | |
910 | activity_led_state = 0; | |
911 | else | |
912 | activity_led_state = 1; | |
913 | ||
914 | /* clear old state */ | |
915 | led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; | |
916 | ||
917 | /* toggle state */ | |
918 | led_message |= (activity_led_state << 16); | |
919 | mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100)); | |
920 | } else { | |
921 | /* switch to idle */ | |
922 | led_message &= ~EM_MSG_LED_VALUE_ACTIVITY; | |
923 | if (emp->blink_policy == BLINK_OFF) | |
924 | led_message |= (1 << 16); | |
925 | } | |
926 | spin_unlock_irqrestore(ap->lock, flags); | |
439d7a35 | 927 | ap->ops->transmit_led_message(ap, led_message, 4); |
365cfa1e AV |
928 | } |
929 | ||
930 | static void ahci_init_sw_activity(struct ata_link *link) | |
931 | { | |
932 | struct ata_port *ap = link->ap; | |
933 | struct ahci_port_priv *pp = ap->private_data; | |
934 | struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; | |
935 | ||
936 | /* init activity stats, setup timer */ | |
937 | emp->saved_activity = emp->activity = 0; | |
938 | setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link); | |
939 | ||
940 | /* check our blink policy and set flag for link if it's enabled */ | |
941 | if (emp->blink_policy) | |
942 | link->flags |= ATA_LFLAG_SW_ACTIVITY; | |
943 | } | |
944 | ||
945 | int ahci_reset_em(struct ata_host *host) | |
946 | { | |
947 | struct ahci_host_priv *hpriv = host->private_data; | |
948 | void __iomem *mmio = hpriv->mmio; | |
949 | u32 em_ctl; | |
950 | ||
951 | em_ctl = readl(mmio + HOST_EM_CTL); | |
952 | if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST)) | |
953 | return -EINVAL; | |
954 | ||
955 | writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL); | |
956 | return 0; | |
957 | } | |
958 | EXPORT_SYMBOL_GPL(ahci_reset_em); | |
959 | ||
960 | static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state, | |
961 | ssize_t size) | |
962 | { | |
963 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
964 | struct ahci_port_priv *pp = ap->private_data; | |
965 | void __iomem *mmio = hpriv->mmio; | |
966 | u32 em_ctl; | |
967 | u32 message[] = {0, 0}; | |
968 | unsigned long flags; | |
969 | int pmp; | |
970 | struct ahci_em_priv *emp; | |
971 | ||
972 | /* get the slot number from the message */ | |
973 | pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; | |
974 | if (pmp < EM_MAX_SLOTS) | |
975 | emp = &pp->em_priv[pmp]; | |
976 | else | |
977 | return -EINVAL; | |
978 | ||
979 | spin_lock_irqsave(ap->lock, flags); | |
980 | ||
981 | /* | |
982 | * if we are still busy transmitting a previous message, | |
983 | * do not allow | |
984 | */ | |
985 | em_ctl = readl(mmio + HOST_EM_CTL); | |
986 | if (em_ctl & EM_CTL_TM) { | |
987 | spin_unlock_irqrestore(ap->lock, flags); | |
988 | return -EBUSY; | |
989 | } | |
990 | ||
008dbd61 HZ |
991 | if (hpriv->em_msg_type & EM_MSG_TYPE_LED) { |
992 | /* | |
993 | * create message header - this is all zero except for | |
994 | * the message size, which is 4 bytes. | |
995 | */ | |
996 | message[0] |= (4 << 8); | |
365cfa1e | 997 | |
008dbd61 HZ |
998 | /* ignore 0:4 of byte zero, fill in port info yourself */ |
999 | message[1] = ((state & ~EM_MSG_LED_HBA_PORT) | ap->port_no); | |
365cfa1e | 1000 | |
008dbd61 HZ |
1001 | /* write message to EM_LOC */ |
1002 | writel(message[0], mmio + hpriv->em_loc); | |
1003 | writel(message[1], mmio + hpriv->em_loc+4); | |
1004 | ||
1005 | /* | |
1006 | * tell hardware to transmit the message | |
1007 | */ | |
1008 | writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL); | |
1009 | } | |
365cfa1e AV |
1010 | |
1011 | /* save off new led state for port/slot */ | |
1012 | emp->led_state = state; | |
1013 | ||
365cfa1e AV |
1014 | spin_unlock_irqrestore(ap->lock, flags); |
1015 | return size; | |
1016 | } | |
1017 | ||
1018 | static ssize_t ahci_led_show(struct ata_port *ap, char *buf) | |
1019 | { | |
1020 | struct ahci_port_priv *pp = ap->private_data; | |
1021 | struct ata_link *link; | |
1022 | struct ahci_em_priv *emp; | |
1023 | int rc = 0; | |
1024 | ||
1025 | ata_for_each_link(link, ap, EDGE) { | |
1026 | emp = &pp->em_priv[link->pmp]; | |
1027 | rc += sprintf(buf, "%lx\n", emp->led_state); | |
1028 | } | |
1029 | return rc; | |
1030 | } | |
1031 | ||
1032 | static ssize_t ahci_led_store(struct ata_port *ap, const char *buf, | |
1033 | size_t size) | |
1034 | { | |
1035 | int state; | |
1036 | int pmp; | |
1037 | struct ahci_port_priv *pp = ap->private_data; | |
1038 | struct ahci_em_priv *emp; | |
1039 | ||
1040 | state = simple_strtoul(buf, NULL, 0); | |
1041 | ||
1042 | /* get the slot number from the message */ | |
1043 | pmp = (state & EM_MSG_LED_PMP_SLOT) >> 8; | |
1044 | if (pmp < EM_MAX_SLOTS) | |
1045 | emp = &pp->em_priv[pmp]; | |
1046 | else | |
1047 | return -EINVAL; | |
1048 | ||
1049 | /* mask off the activity bits if we are in sw_activity | |
1050 | * mode, user should turn off sw_activity before setting | |
1051 | * activity led through em_message | |
1052 | */ | |
1053 | if (emp->blink_policy) | |
1054 | state &= ~EM_MSG_LED_VALUE_ACTIVITY; | |
1055 | ||
439d7a35 | 1056 | return ap->ops->transmit_led_message(ap, state, size); |
365cfa1e AV |
1057 | } |
1058 | ||
1059 | static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val) | |
1060 | { | |
1061 | struct ata_link *link = dev->link; | |
1062 | struct ata_port *ap = link->ap; | |
1063 | struct ahci_port_priv *pp = ap->private_data; | |
1064 | struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; | |
1065 | u32 port_led_state = emp->led_state; | |
1066 | ||
1067 | /* save the desired Activity LED behavior */ | |
1068 | if (val == OFF) { | |
1069 | /* clear LFLAG */ | |
1070 | link->flags &= ~(ATA_LFLAG_SW_ACTIVITY); | |
1071 | ||
1072 | /* set the LED to OFF */ | |
1073 | port_led_state &= EM_MSG_LED_VALUE_OFF; | |
1074 | port_led_state |= (ap->port_no | (link->pmp << 8)); | |
439d7a35 | 1075 | ap->ops->transmit_led_message(ap, port_led_state, 4); |
365cfa1e AV |
1076 | } else { |
1077 | link->flags |= ATA_LFLAG_SW_ACTIVITY; | |
1078 | if (val == BLINK_OFF) { | |
1079 | /* set LED to ON for idle */ | |
1080 | port_led_state &= EM_MSG_LED_VALUE_OFF; | |
1081 | port_led_state |= (ap->port_no | (link->pmp << 8)); | |
1082 | port_led_state |= EM_MSG_LED_VALUE_ON; /* check this */ | |
439d7a35 | 1083 | ap->ops->transmit_led_message(ap, port_led_state, 4); |
365cfa1e AV |
1084 | } |
1085 | } | |
1086 | emp->blink_policy = val; | |
1087 | return 0; | |
1088 | } | |
1089 | ||
1090 | static ssize_t ahci_activity_show(struct ata_device *dev, char *buf) | |
1091 | { | |
1092 | struct ata_link *link = dev->link; | |
1093 | struct ata_port *ap = link->ap; | |
1094 | struct ahci_port_priv *pp = ap->private_data; | |
1095 | struct ahci_em_priv *emp = &pp->em_priv[link->pmp]; | |
1096 | ||
1097 | /* display the saved value of activity behavior for this | |
1098 | * disk. | |
1099 | */ | |
1100 | return sprintf(buf, "%d\n", emp->blink_policy); | |
1101 | } | |
1102 | ||
1103 | static void ahci_port_init(struct device *dev, struct ata_port *ap, | |
1104 | int port_no, void __iomem *mmio, | |
1105 | void __iomem *port_mmio) | |
1106 | { | |
1107 | const char *emsg = NULL; | |
1108 | int rc; | |
1109 | u32 tmp; | |
1110 | ||
1111 | /* make sure port is not active */ | |
1112 | rc = ahci_deinit_port(ap, &emsg); | |
1113 | if (rc) | |
1114 | dev_warn(dev, "%s (%d)\n", emsg, rc); | |
1115 | ||
1116 | /* clear SError */ | |
1117 | tmp = readl(port_mmio + PORT_SCR_ERR); | |
1118 | VPRINTK("PORT_SCR_ERR 0x%x\n", tmp); | |
1119 | writel(tmp, port_mmio + PORT_SCR_ERR); | |
1120 | ||
1121 | /* clear port IRQ */ | |
1122 | tmp = readl(port_mmio + PORT_IRQ_STAT); | |
1123 | VPRINTK("PORT_IRQ_STAT 0x%x\n", tmp); | |
1124 | if (tmp) | |
1125 | writel(tmp, port_mmio + PORT_IRQ_STAT); | |
1126 | ||
1127 | writel(1 << port_no, mmio + HOST_IRQ_STAT); | |
1128 | } | |
1129 | ||
1130 | void ahci_init_controller(struct ata_host *host) | |
1131 | { | |
1132 | struct ahci_host_priv *hpriv = host->private_data; | |
1133 | void __iomem *mmio = hpriv->mmio; | |
1134 | int i; | |
1135 | void __iomem *port_mmio; | |
1136 | u32 tmp; | |
1137 | ||
1138 | for (i = 0; i < host->n_ports; i++) { | |
1139 | struct ata_port *ap = host->ports[i]; | |
1140 | ||
1141 | port_mmio = ahci_port_base(ap); | |
1142 | if (ata_port_is_dummy(ap)) | |
1143 | continue; | |
1144 | ||
1145 | ahci_port_init(host->dev, ap, i, mmio, port_mmio); | |
1146 | } | |
1147 | ||
1148 | tmp = readl(mmio + HOST_CTL); | |
1149 | VPRINTK("HOST_CTL 0x%x\n", tmp); | |
1150 | writel(tmp | HOST_IRQ_EN, mmio + HOST_CTL); | |
1151 | tmp = readl(mmio + HOST_CTL); | |
1152 | VPRINTK("HOST_CTL 0x%x\n", tmp); | |
1153 | } | |
1154 | EXPORT_SYMBOL_GPL(ahci_init_controller); | |
1155 | ||
1156 | static void ahci_dev_config(struct ata_device *dev) | |
1157 | { | |
1158 | struct ahci_host_priv *hpriv = dev->link->ap->host->private_data; | |
1159 | ||
1160 | if (hpriv->flags & AHCI_HFLAG_SECT255) { | |
1161 | dev->max_sectors = 255; | |
a9a79dfe JP |
1162 | ata_dev_info(dev, |
1163 | "SB600 AHCI: limiting to 255 sectors per cmd\n"); | |
365cfa1e AV |
1164 | } |
1165 | } | |
1166 | ||
bbb4ab43 | 1167 | unsigned int ahci_dev_classify(struct ata_port *ap) |
365cfa1e AV |
1168 | { |
1169 | void __iomem *port_mmio = ahci_port_base(ap); | |
1170 | struct ata_taskfile tf; | |
1171 | u32 tmp; | |
1172 | ||
1173 | tmp = readl(port_mmio + PORT_SIG); | |
1174 | tf.lbah = (tmp >> 24) & 0xff; | |
1175 | tf.lbam = (tmp >> 16) & 0xff; | |
1176 | tf.lbal = (tmp >> 8) & 0xff; | |
1177 | tf.nsect = (tmp) & 0xff; | |
1178 | ||
1179 | return ata_dev_classify(&tf); | |
1180 | } | |
bbb4ab43 | 1181 | EXPORT_SYMBOL_GPL(ahci_dev_classify); |
365cfa1e | 1182 | |
02cdfcf0 DM |
1183 | void ahci_fill_cmd_slot(struct ahci_port_priv *pp, unsigned int tag, |
1184 | u32 opts) | |
365cfa1e AV |
1185 | { |
1186 | dma_addr_t cmd_tbl_dma; | |
1187 | ||
1188 | cmd_tbl_dma = pp->cmd_tbl_dma + tag * AHCI_CMD_TBL_SZ; | |
1189 | ||
1190 | pp->cmd_slot[tag].opts = cpu_to_le32(opts); | |
1191 | pp->cmd_slot[tag].status = 0; | |
1192 | pp->cmd_slot[tag].tbl_addr = cpu_to_le32(cmd_tbl_dma & 0xffffffff); | |
1193 | pp->cmd_slot[tag].tbl_addr_hi = cpu_to_le32((cmd_tbl_dma >> 16) >> 16); | |
1194 | } | |
02cdfcf0 | 1195 | EXPORT_SYMBOL_GPL(ahci_fill_cmd_slot); |
365cfa1e AV |
1196 | |
1197 | int ahci_kick_engine(struct ata_port *ap) | |
1198 | { | |
1199 | void __iomem *port_mmio = ahci_port_base(ap); | |
1200 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
1201 | u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; | |
1202 | u32 tmp; | |
1203 | int busy, rc; | |
1204 | ||
1205 | /* stop engine */ | |
1206 | rc = ahci_stop_engine(ap); | |
1207 | if (rc) | |
1208 | goto out_restart; | |
1209 | ||
1210 | /* need to do CLO? | |
1211 | * always do CLO if PMP is attached (AHCI-1.3 9.2) | |
1212 | */ | |
1213 | busy = status & (ATA_BUSY | ATA_DRQ); | |
1214 | if (!busy && !sata_pmp_attached(ap)) { | |
1215 | rc = 0; | |
1216 | goto out_restart; | |
1217 | } | |
1218 | ||
1219 | if (!(hpriv->cap & HOST_CAP_CLO)) { | |
1220 | rc = -EOPNOTSUPP; | |
1221 | goto out_restart; | |
1222 | } | |
1223 | ||
1224 | /* perform CLO */ | |
1225 | tmp = readl(port_mmio + PORT_CMD); | |
1226 | tmp |= PORT_CMD_CLO; | |
1227 | writel(tmp, port_mmio + PORT_CMD); | |
1228 | ||
1229 | rc = 0; | |
97750ceb | 1230 | tmp = ata_wait_register(ap, port_mmio + PORT_CMD, |
365cfa1e AV |
1231 | PORT_CMD_CLO, PORT_CMD_CLO, 1, 500); |
1232 | if (tmp & PORT_CMD_CLO) | |
1233 | rc = -EIO; | |
1234 | ||
1235 | /* restart engine */ | |
1236 | out_restart: | |
1237 | ahci_start_engine(ap); | |
1238 | return rc; | |
1239 | } | |
1240 | EXPORT_SYMBOL_GPL(ahci_kick_engine); | |
1241 | ||
1242 | static int ahci_exec_polled_cmd(struct ata_port *ap, int pmp, | |
1243 | struct ata_taskfile *tf, int is_cmd, u16 flags, | |
1244 | unsigned long timeout_msec) | |
1245 | { | |
1246 | const u32 cmd_fis_len = 5; /* five dwords */ | |
1247 | struct ahci_port_priv *pp = ap->private_data; | |
1248 | void __iomem *port_mmio = ahci_port_base(ap); | |
1249 | u8 *fis = pp->cmd_tbl; | |
1250 | u32 tmp; | |
1251 | ||
1252 | /* prep the command */ | |
1253 | ata_tf_to_fis(tf, pmp, is_cmd, fis); | |
1254 | ahci_fill_cmd_slot(pp, 0, cmd_fis_len | flags | (pmp << 12)); | |
1255 | ||
1256 | /* issue & wait */ | |
1257 | writel(1, port_mmio + PORT_CMD_ISSUE); | |
1258 | ||
1259 | if (timeout_msec) { | |
97750ceb TH |
1260 | tmp = ata_wait_register(ap, port_mmio + PORT_CMD_ISSUE, |
1261 | 0x1, 0x1, 1, timeout_msec); | |
365cfa1e AV |
1262 | if (tmp & 0x1) { |
1263 | ahci_kick_engine(ap); | |
1264 | return -EBUSY; | |
1265 | } | |
1266 | } else | |
1267 | readl(port_mmio + PORT_CMD_ISSUE); /* flush */ | |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | int ahci_do_softreset(struct ata_link *link, unsigned int *class, | |
1273 | int pmp, unsigned long deadline, | |
1274 | int (*check_ready)(struct ata_link *link)) | |
1275 | { | |
1276 | struct ata_port *ap = link->ap; | |
1277 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
89dafa20 | 1278 | struct ahci_port_priv *pp = ap->private_data; |
365cfa1e AV |
1279 | const char *reason = NULL; |
1280 | unsigned long now, msecs; | |
1281 | struct ata_taskfile tf; | |
89dafa20 | 1282 | bool fbs_disabled = false; |
365cfa1e AV |
1283 | int rc; |
1284 | ||
1285 | DPRINTK("ENTER\n"); | |
1286 | ||
1287 | /* prepare for SRST (AHCI-1.1 10.4.1) */ | |
1288 | rc = ahci_kick_engine(ap); | |
1289 | if (rc && rc != -EOPNOTSUPP) | |
a9a79dfe | 1290 | ata_link_warn(link, "failed to reset engine (errno=%d)\n", rc); |
365cfa1e | 1291 | |
89dafa20 | 1292 | /* |
1293 | * According to AHCI-1.2 9.3.9: if FBS is enable, software shall | |
1294 | * clear PxFBS.EN to '0' prior to issuing software reset to devices | |
1295 | * that is attached to port multiplier. | |
1296 | */ | |
1297 | if (!ata_is_host_link(link) && pp->fbs_enabled) { | |
1298 | ahci_disable_fbs(ap); | |
1299 | fbs_disabled = true; | |
1300 | } | |
1301 | ||
365cfa1e AV |
1302 | ata_tf_init(link->device, &tf); |
1303 | ||
1304 | /* issue the first D2H Register FIS */ | |
1305 | msecs = 0; | |
1306 | now = jiffies; | |
f1f5a807 | 1307 | if (time_after(deadline, now)) |
365cfa1e AV |
1308 | msecs = jiffies_to_msecs(deadline - now); |
1309 | ||
1310 | tf.ctl |= ATA_SRST; | |
1311 | if (ahci_exec_polled_cmd(ap, pmp, &tf, 0, | |
1312 | AHCI_CMD_RESET | AHCI_CMD_CLR_BUSY, msecs)) { | |
1313 | rc = -EIO; | |
1314 | reason = "1st FIS failed"; | |
1315 | goto fail; | |
1316 | } | |
1317 | ||
1318 | /* spec says at least 5us, but be generous and sleep for 1ms */ | |
97750ceb | 1319 | ata_msleep(ap, 1); |
365cfa1e AV |
1320 | |
1321 | /* issue the second D2H Register FIS */ | |
1322 | tf.ctl &= ~ATA_SRST; | |
1323 | ahci_exec_polled_cmd(ap, pmp, &tf, 0, 0, 0); | |
1324 | ||
1325 | /* wait for link to become ready */ | |
1326 | rc = ata_wait_after_reset(link, deadline, check_ready); | |
1327 | if (rc == -EBUSY && hpriv->flags & AHCI_HFLAG_SRST_TOUT_IS_OFFLINE) { | |
1328 | /* | |
1329 | * Workaround for cases where link online status can't | |
1330 | * be trusted. Treat device readiness timeout as link | |
1331 | * offline. | |
1332 | */ | |
a9a79dfe | 1333 | ata_link_info(link, "device not ready, treating as offline\n"); |
365cfa1e AV |
1334 | *class = ATA_DEV_NONE; |
1335 | } else if (rc) { | |
1336 | /* link occupied, -ENODEV too is an error */ | |
1337 | reason = "device not ready"; | |
1338 | goto fail; | |
1339 | } else | |
1340 | *class = ahci_dev_classify(ap); | |
1341 | ||
89dafa20 | 1342 | /* re-enable FBS if disabled before */ |
1343 | if (fbs_disabled) | |
1344 | ahci_enable_fbs(ap); | |
1345 | ||
365cfa1e AV |
1346 | DPRINTK("EXIT, class=%u\n", *class); |
1347 | return 0; | |
1348 | ||
1349 | fail: | |
a9a79dfe | 1350 | ata_link_err(link, "softreset failed (%s)\n", reason); |
365cfa1e AV |
1351 | return rc; |
1352 | } | |
1353 | ||
1354 | int ahci_check_ready(struct ata_link *link) | |
1355 | { | |
1356 | void __iomem *port_mmio = ahci_port_base(link->ap); | |
1357 | u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; | |
1358 | ||
1359 | return ata_check_ready(status); | |
1360 | } | |
1361 | EXPORT_SYMBOL_GPL(ahci_check_ready); | |
1362 | ||
1363 | static int ahci_softreset(struct ata_link *link, unsigned int *class, | |
1364 | unsigned long deadline) | |
1365 | { | |
1366 | int pmp = sata_srst_pmp(link); | |
1367 | ||
1368 | DPRINTK("ENTER\n"); | |
1369 | ||
1370 | return ahci_do_softreset(link, class, pmp, deadline, ahci_check_ready); | |
1371 | } | |
1372 | EXPORT_SYMBOL_GPL(ahci_do_softreset); | |
1373 | ||
345347c5 YHC |
1374 | static int ahci_bad_pmp_check_ready(struct ata_link *link) |
1375 | { | |
1376 | void __iomem *port_mmio = ahci_port_base(link->ap); | |
1377 | u8 status = readl(port_mmio + PORT_TFDATA) & 0xFF; | |
1378 | u32 irq_status = readl(port_mmio + PORT_IRQ_STAT); | |
1379 | ||
1380 | /* | |
1381 | * There is no need to check TFDATA if BAD PMP is found due to HW bug, | |
1382 | * which can save timeout delay. | |
1383 | */ | |
1384 | if (irq_status & PORT_IRQ_BAD_PMP) | |
1385 | return -EIO; | |
1386 | ||
1387 | return ata_check_ready(status); | |
1388 | } | |
1389 | ||
1390 | int ahci_pmp_retry_softreset(struct ata_link *link, unsigned int *class, | |
1391 | unsigned long deadline) | |
1392 | { | |
1393 | struct ata_port *ap = link->ap; | |
1394 | void __iomem *port_mmio = ahci_port_base(ap); | |
1395 | int pmp = sata_srst_pmp(link); | |
1396 | int rc; | |
1397 | u32 irq_sts; | |
1398 | ||
1399 | DPRINTK("ENTER\n"); | |
1400 | ||
1401 | rc = ahci_do_softreset(link, class, pmp, deadline, | |
1402 | ahci_bad_pmp_check_ready); | |
1403 | ||
1404 | /* | |
1405 | * Soft reset fails with IPMS set when PMP is enabled but | |
1406 | * SATA HDD/ODD is connected to SATA port, do soft reset | |
1407 | * again to port 0. | |
1408 | */ | |
1409 | if (rc == -EIO) { | |
1410 | irq_sts = readl(port_mmio + PORT_IRQ_STAT); | |
1411 | if (irq_sts & PORT_IRQ_BAD_PMP) { | |
39f80acb | 1412 | ata_link_warn(link, |
345347c5 YHC |
1413 | "applying PMP SRST workaround " |
1414 | "and retrying\n"); | |
1415 | rc = ahci_do_softreset(link, class, 0, deadline, | |
1416 | ahci_check_ready); | |
1417 | } | |
1418 | } | |
1419 | ||
1420 | return rc; | |
1421 | } | |
1422 | ||
365cfa1e AV |
1423 | static int ahci_hardreset(struct ata_link *link, unsigned int *class, |
1424 | unsigned long deadline) | |
1425 | { | |
1426 | const unsigned long *timing = sata_ehc_deb_timing(&link->eh_context); | |
1427 | struct ata_port *ap = link->ap; | |
1428 | struct ahci_port_priv *pp = ap->private_data; | |
1429 | u8 *d2h_fis = pp->rx_fis + RX_FIS_D2H_REG; | |
1430 | struct ata_taskfile tf; | |
1431 | bool online; | |
1432 | int rc; | |
1433 | ||
1434 | DPRINTK("ENTER\n"); | |
1435 | ||
1436 | ahci_stop_engine(ap); | |
1437 | ||
1438 | /* clear D2H reception area to properly wait for D2H FIS */ | |
1439 | ata_tf_init(link->device, &tf); | |
9bbb1b0e | 1440 | tf.command = ATA_BUSY; |
365cfa1e AV |
1441 | ata_tf_to_fis(&tf, 0, 0, d2h_fis); |
1442 | ||
1443 | rc = sata_link_hardreset(link, timing, deadline, &online, | |
1444 | ahci_check_ready); | |
1445 | ||
1446 | ahci_start_engine(ap); | |
1447 | ||
1448 | if (online) | |
1449 | *class = ahci_dev_classify(ap); | |
1450 | ||
1451 | DPRINTK("EXIT, rc=%d, class=%u\n", rc, *class); | |
1452 | return rc; | |
1453 | } | |
1454 | ||
1455 | static void ahci_postreset(struct ata_link *link, unsigned int *class) | |
1456 | { | |
1457 | struct ata_port *ap = link->ap; | |
1458 | void __iomem *port_mmio = ahci_port_base(ap); | |
1459 | u32 new_tmp, tmp; | |
1460 | ||
1461 | ata_std_postreset(link, class); | |
1462 | ||
1463 | /* Make sure port's ATAPI bit is set appropriately */ | |
1464 | new_tmp = tmp = readl(port_mmio + PORT_CMD); | |
1465 | if (*class == ATA_DEV_ATAPI) | |
1466 | new_tmp |= PORT_CMD_ATAPI; | |
1467 | else | |
1468 | new_tmp &= ~PORT_CMD_ATAPI; | |
1469 | if (new_tmp != tmp) { | |
1470 | writel(new_tmp, port_mmio + PORT_CMD); | |
1471 | readl(port_mmio + PORT_CMD); /* flush */ | |
1472 | } | |
1473 | } | |
1474 | ||
1475 | static unsigned int ahci_fill_sg(struct ata_queued_cmd *qc, void *cmd_tbl) | |
1476 | { | |
1477 | struct scatterlist *sg; | |
1478 | struct ahci_sg *ahci_sg = cmd_tbl + AHCI_CMD_TBL_HDR_SZ; | |
1479 | unsigned int si; | |
1480 | ||
1481 | VPRINTK("ENTER\n"); | |
1482 | ||
1483 | /* | |
1484 | * Next, the S/G list. | |
1485 | */ | |
1486 | for_each_sg(qc->sg, sg, qc->n_elem, si) { | |
1487 | dma_addr_t addr = sg_dma_address(sg); | |
1488 | u32 sg_len = sg_dma_len(sg); | |
1489 | ||
1490 | ahci_sg[si].addr = cpu_to_le32(addr & 0xffffffff); | |
1491 | ahci_sg[si].addr_hi = cpu_to_le32((addr >> 16) >> 16); | |
1492 | ahci_sg[si].flags_size = cpu_to_le32(sg_len - 1); | |
1493 | } | |
1494 | ||
1495 | return si; | |
1496 | } | |
1497 | ||
1498 | static int ahci_pmp_qc_defer(struct ata_queued_cmd *qc) | |
1499 | { | |
1500 | struct ata_port *ap = qc->ap; | |
1501 | struct ahci_port_priv *pp = ap->private_data; | |
1502 | ||
1503 | if (!sata_pmp_attached(ap) || pp->fbs_enabled) | |
1504 | return ata_std_qc_defer(qc); | |
1505 | else | |
1506 | return sata_pmp_qc_defer_cmd_switch(qc); | |
1507 | } | |
1508 | ||
1509 | static void ahci_qc_prep(struct ata_queued_cmd *qc) | |
1510 | { | |
1511 | struct ata_port *ap = qc->ap; | |
1512 | struct ahci_port_priv *pp = ap->private_data; | |
1513 | int is_atapi = ata_is_atapi(qc->tf.protocol); | |
1514 | void *cmd_tbl; | |
1515 | u32 opts; | |
1516 | const u32 cmd_fis_len = 5; /* five dwords */ | |
1517 | unsigned int n_elem; | |
1518 | ||
1519 | /* | |
1520 | * Fill in command table information. First, the header, | |
1521 | * a SATA Register - Host to Device command FIS. | |
1522 | */ | |
1523 | cmd_tbl = pp->cmd_tbl + qc->tag * AHCI_CMD_TBL_SZ; | |
1524 | ||
1525 | ata_tf_to_fis(&qc->tf, qc->dev->link->pmp, 1, cmd_tbl); | |
1526 | if (is_atapi) { | |
1527 | memset(cmd_tbl + AHCI_CMD_TBL_CDB, 0, 32); | |
1528 | memcpy(cmd_tbl + AHCI_CMD_TBL_CDB, qc->cdb, qc->dev->cdb_len); | |
1529 | } | |
1530 | ||
1531 | n_elem = 0; | |
1532 | if (qc->flags & ATA_QCFLAG_DMAMAP) | |
1533 | n_elem = ahci_fill_sg(qc, cmd_tbl); | |
1534 | ||
1535 | /* | |
1536 | * Fill in command slot information. | |
1537 | */ | |
1538 | opts = cmd_fis_len | n_elem << 16 | (qc->dev->link->pmp << 12); | |
1539 | if (qc->tf.flags & ATA_TFLAG_WRITE) | |
1540 | opts |= AHCI_CMD_WRITE; | |
1541 | if (is_atapi) | |
1542 | opts |= AHCI_CMD_ATAPI | AHCI_CMD_PREFETCH; | |
1543 | ||
1544 | ahci_fill_cmd_slot(pp, qc->tag, opts); | |
1545 | } | |
1546 | ||
1547 | static void ahci_fbs_dec_intr(struct ata_port *ap) | |
1548 | { | |
1549 | struct ahci_port_priv *pp = ap->private_data; | |
1550 | void __iomem *port_mmio = ahci_port_base(ap); | |
1551 | u32 fbs = readl(port_mmio + PORT_FBS); | |
1552 | int retries = 3; | |
1553 | ||
1554 | DPRINTK("ENTER\n"); | |
1555 | BUG_ON(!pp->fbs_enabled); | |
1556 | ||
1557 | /* time to wait for DEC is not specified by AHCI spec, | |
1558 | * add a retry loop for safety. | |
1559 | */ | |
1560 | writel(fbs | PORT_FBS_DEC, port_mmio + PORT_FBS); | |
1561 | fbs = readl(port_mmio + PORT_FBS); | |
1562 | while ((fbs & PORT_FBS_DEC) && retries--) { | |
1563 | udelay(1); | |
1564 | fbs = readl(port_mmio + PORT_FBS); | |
1565 | } | |
1566 | ||
1567 | if (fbs & PORT_FBS_DEC) | |
a44fec1f | 1568 | dev_err(ap->host->dev, "failed to clear device error\n"); |
365cfa1e AV |
1569 | } |
1570 | ||
1571 | static void ahci_error_intr(struct ata_port *ap, u32 irq_stat) | |
1572 | { | |
1573 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
1574 | struct ahci_port_priv *pp = ap->private_data; | |
1575 | struct ata_eh_info *host_ehi = &ap->link.eh_info; | |
1576 | struct ata_link *link = NULL; | |
1577 | struct ata_queued_cmd *active_qc; | |
1578 | struct ata_eh_info *active_ehi; | |
1579 | bool fbs_need_dec = false; | |
1580 | u32 serror; | |
1581 | ||
1582 | /* determine active link with error */ | |
1583 | if (pp->fbs_enabled) { | |
1584 | void __iomem *port_mmio = ahci_port_base(ap); | |
1585 | u32 fbs = readl(port_mmio + PORT_FBS); | |
1586 | int pmp = fbs >> PORT_FBS_DWE_OFFSET; | |
1587 | ||
912b9ac6 | 1588 | if ((fbs & PORT_FBS_SDE) && (pmp < ap->nr_pmp_links)) { |
365cfa1e AV |
1589 | link = &ap->pmp_link[pmp]; |
1590 | fbs_need_dec = true; | |
1591 | } | |
1592 | ||
1593 | } else | |
1594 | ata_for_each_link(link, ap, EDGE) | |
1595 | if (ata_link_active(link)) | |
1596 | break; | |
1597 | ||
1598 | if (!link) | |
1599 | link = &ap->link; | |
1600 | ||
1601 | active_qc = ata_qc_from_tag(ap, link->active_tag); | |
1602 | active_ehi = &link->eh_info; | |
1603 | ||
1604 | /* record irq stat */ | |
1605 | ata_ehi_clear_desc(host_ehi); | |
1606 | ata_ehi_push_desc(host_ehi, "irq_stat 0x%08x", irq_stat); | |
1607 | ||
1608 | /* AHCI needs SError cleared; otherwise, it might lock up */ | |
1609 | ahci_scr_read(&ap->link, SCR_ERROR, &serror); | |
1610 | ahci_scr_write(&ap->link, SCR_ERROR, serror); | |
1611 | host_ehi->serror |= serror; | |
1612 | ||
1613 | /* some controllers set IRQ_IF_ERR on device errors, ignore it */ | |
1614 | if (hpriv->flags & AHCI_HFLAG_IGN_IRQ_IF_ERR) | |
1615 | irq_stat &= ~PORT_IRQ_IF_ERR; | |
1616 | ||
1617 | if (irq_stat & PORT_IRQ_TF_ERR) { | |
1618 | /* If qc is active, charge it; otherwise, the active | |
1619 | * link. There's no active qc on NCQ errors. It will | |
1620 | * be determined by EH by reading log page 10h. | |
1621 | */ | |
1622 | if (active_qc) | |
1623 | active_qc->err_mask |= AC_ERR_DEV; | |
1624 | else | |
1625 | active_ehi->err_mask |= AC_ERR_DEV; | |
1626 | ||
1627 | if (hpriv->flags & AHCI_HFLAG_IGN_SERR_INTERNAL) | |
1628 | host_ehi->serror &= ~SERR_INTERNAL; | |
1629 | } | |
1630 | ||
1631 | if (irq_stat & PORT_IRQ_UNK_FIS) { | |
1632 | u32 *unk = (u32 *)(pp->rx_fis + RX_FIS_UNK); | |
1633 | ||
1634 | active_ehi->err_mask |= AC_ERR_HSM; | |
1635 | active_ehi->action |= ATA_EH_RESET; | |
1636 | ata_ehi_push_desc(active_ehi, | |
1637 | "unknown FIS %08x %08x %08x %08x" , | |
1638 | unk[0], unk[1], unk[2], unk[3]); | |
1639 | } | |
1640 | ||
1641 | if (sata_pmp_attached(ap) && (irq_stat & PORT_IRQ_BAD_PMP)) { | |
1642 | active_ehi->err_mask |= AC_ERR_HSM; | |
1643 | active_ehi->action |= ATA_EH_RESET; | |
1644 | ata_ehi_push_desc(active_ehi, "incorrect PMP"); | |
1645 | } | |
1646 | ||
1647 | if (irq_stat & (PORT_IRQ_HBUS_ERR | PORT_IRQ_HBUS_DATA_ERR)) { | |
1648 | host_ehi->err_mask |= AC_ERR_HOST_BUS; | |
1649 | host_ehi->action |= ATA_EH_RESET; | |
1650 | ata_ehi_push_desc(host_ehi, "host bus error"); | |
1651 | } | |
1652 | ||
1653 | if (irq_stat & PORT_IRQ_IF_ERR) { | |
1654 | if (fbs_need_dec) | |
1655 | active_ehi->err_mask |= AC_ERR_DEV; | |
1656 | else { | |
1657 | host_ehi->err_mask |= AC_ERR_ATA_BUS; | |
1658 | host_ehi->action |= ATA_EH_RESET; | |
1659 | } | |
1660 | ||
1661 | ata_ehi_push_desc(host_ehi, "interface fatal error"); | |
1662 | } | |
1663 | ||
1664 | if (irq_stat & (PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY)) { | |
1665 | ata_ehi_hotplugged(host_ehi); | |
1666 | ata_ehi_push_desc(host_ehi, "%s", | |
1667 | irq_stat & PORT_IRQ_CONNECT ? | |
1668 | "connection status changed" : "PHY RDY changed"); | |
1669 | } | |
1670 | ||
1671 | /* okay, let's hand over to EH */ | |
1672 | ||
1673 | if (irq_stat & PORT_IRQ_FREEZE) | |
1674 | ata_port_freeze(ap); | |
1675 | else if (fbs_need_dec) { | |
1676 | ata_link_abort(link); | |
1677 | ahci_fbs_dec_intr(ap); | |
1678 | } else | |
1679 | ata_port_abort(ap); | |
1680 | } | |
1681 | ||
5ca72c4f AG |
1682 | static void ahci_handle_port_interrupt(struct ata_port *ap, |
1683 | void __iomem *port_mmio, u32 status) | |
365cfa1e | 1684 | { |
365cfa1e AV |
1685 | struct ata_eh_info *ehi = &ap->link.eh_info; |
1686 | struct ahci_port_priv *pp = ap->private_data; | |
1687 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
1688 | int resetting = !!(ap->pflags & ATA_PFLAG_RESETTING); | |
5ca72c4f | 1689 | u32 qc_active = 0; |
365cfa1e AV |
1690 | int rc; |
1691 | ||
365cfa1e AV |
1692 | /* ignore BAD_PMP while resetting */ |
1693 | if (unlikely(resetting)) | |
1694 | status &= ~PORT_IRQ_BAD_PMP; | |
1695 | ||
6b7ae954 TH |
1696 | /* if LPM is enabled, PHYRDY doesn't mean anything */ |
1697 | if (ap->link.lpm_policy > ATA_LPM_MAX_POWER) { | |
365cfa1e | 1698 | status &= ~PORT_IRQ_PHYRDY; |
6b7ae954 | 1699 | ahci_scr_write(&ap->link, SCR_ERROR, SERR_PHYRDY_CHG); |
365cfa1e AV |
1700 | } |
1701 | ||
1702 | if (unlikely(status & PORT_IRQ_ERROR)) { | |
1703 | ahci_error_intr(ap, status); | |
1704 | return; | |
1705 | } | |
1706 | ||
1707 | if (status & PORT_IRQ_SDB_FIS) { | |
1708 | /* If SNotification is available, leave notification | |
1709 | * handling to sata_async_notification(). If not, | |
1710 | * emulate it by snooping SDB FIS RX area. | |
1711 | * | |
1712 | * Snooping FIS RX area is probably cheaper than | |
1713 | * poking SNotification but some constrollers which | |
1714 | * implement SNotification, ICH9 for example, don't | |
1715 | * store AN SDB FIS into receive area. | |
1716 | */ | |
1717 | if (hpriv->cap & HOST_CAP_SNTF) | |
1718 | sata_async_notification(ap); | |
1719 | else { | |
1720 | /* If the 'N' bit in word 0 of the FIS is set, | |
1721 | * we just received asynchronous notification. | |
1722 | * Tell libata about it. | |
1723 | * | |
1724 | * Lack of SNotification should not appear in | |
1725 | * ahci 1.2, so the workaround is unnecessary | |
1726 | * when FBS is enabled. | |
1727 | */ | |
1728 | if (pp->fbs_enabled) | |
1729 | WARN_ON_ONCE(1); | |
1730 | else { | |
1731 | const __le32 *f = pp->rx_fis + RX_FIS_SDB; | |
1732 | u32 f0 = le32_to_cpu(f[0]); | |
1733 | if (f0 & (1 << 15)) | |
1734 | sata_async_notification(ap); | |
1735 | } | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | /* pp->active_link is not reliable once FBS is enabled, both | |
1740 | * PORT_SCR_ACT and PORT_CMD_ISSUE should be checked because | |
1741 | * NCQ and non-NCQ commands may be in flight at the same time. | |
1742 | */ | |
1743 | if (pp->fbs_enabled) { | |
1744 | if (ap->qc_active) { | |
1745 | qc_active = readl(port_mmio + PORT_SCR_ACT); | |
1746 | qc_active |= readl(port_mmio + PORT_CMD_ISSUE); | |
1747 | } | |
1748 | } else { | |
1749 | /* pp->active_link is valid iff any command is in flight */ | |
1750 | if (ap->qc_active && pp->active_link->sactive) | |
1751 | qc_active = readl(port_mmio + PORT_SCR_ACT); | |
1752 | else | |
1753 | qc_active = readl(port_mmio + PORT_CMD_ISSUE); | |
1754 | } | |
1755 | ||
1756 | ||
1757 | rc = ata_qc_complete_multiple(ap, qc_active); | |
1758 | ||
1759 | /* while resetting, invalid completions are expected */ | |
1760 | if (unlikely(rc < 0 && !resetting)) { | |
1761 | ehi->err_mask |= AC_ERR_HSM; | |
1762 | ehi->action |= ATA_EH_RESET; | |
1763 | ata_port_freeze(ap); | |
1764 | } | |
1765 | } | |
1766 | ||
5ca72c4f AG |
1767 | void ahci_port_intr(struct ata_port *ap) |
1768 | { | |
1769 | void __iomem *port_mmio = ahci_port_base(ap); | |
1770 | u32 status; | |
1771 | ||
1772 | status = readl(port_mmio + PORT_IRQ_STAT); | |
1773 | writel(status, port_mmio + PORT_IRQ_STAT); | |
1774 | ||
1775 | ahci_handle_port_interrupt(ap, port_mmio, status); | |
1776 | } | |
1777 | ||
1778 | irqreturn_t ahci_thread_fn(int irq, void *dev_instance) | |
1779 | { | |
1780 | struct ata_port *ap = dev_instance; | |
1781 | struct ahci_port_priv *pp = ap->private_data; | |
1782 | void __iomem *port_mmio = ahci_port_base(ap); | |
1783 | unsigned long flags; | |
1784 | u32 status; | |
1785 | ||
1786 | spin_lock_irqsave(&ap->host->lock, flags); | |
1787 | status = pp->intr_status; | |
1788 | if (status) | |
1789 | pp->intr_status = 0; | |
1790 | spin_unlock_irqrestore(&ap->host->lock, flags); | |
1791 | ||
1792 | spin_lock_bh(ap->lock); | |
1793 | ahci_handle_port_interrupt(ap, port_mmio, status); | |
1794 | spin_unlock_bh(ap->lock); | |
1795 | ||
1796 | return IRQ_HANDLED; | |
1797 | } | |
1798 | EXPORT_SYMBOL_GPL(ahci_thread_fn); | |
1799 | ||
1800 | void ahci_hw_port_interrupt(struct ata_port *ap) | |
1801 | { | |
1802 | void __iomem *port_mmio = ahci_port_base(ap); | |
1803 | struct ahci_port_priv *pp = ap->private_data; | |
1804 | u32 status; | |
1805 | ||
1806 | status = readl(port_mmio + PORT_IRQ_STAT); | |
1807 | writel(status, port_mmio + PORT_IRQ_STAT); | |
1808 | ||
1809 | pp->intr_status |= status; | |
1810 | } | |
1811 | ||
1812 | irqreturn_t ahci_hw_interrupt(int irq, void *dev_instance) | |
1813 | { | |
1814 | struct ata_port *ap_this = dev_instance; | |
1815 | struct ahci_port_priv *pp = ap_this->private_data; | |
1816 | struct ata_host *host = ap_this->host; | |
1817 | struct ahci_host_priv *hpriv = host->private_data; | |
1818 | void __iomem *mmio = hpriv->mmio; | |
1819 | unsigned int i; | |
1820 | u32 irq_stat, irq_masked; | |
1821 | ||
1822 | VPRINTK("ENTER\n"); | |
1823 | ||
1824 | spin_lock(&host->lock); | |
1825 | ||
1826 | irq_stat = readl(mmio + HOST_IRQ_STAT); | |
1827 | ||
1828 | if (!irq_stat) { | |
1829 | u32 status = pp->intr_status; | |
1830 | ||
1831 | spin_unlock(&host->lock); | |
1832 | ||
1833 | VPRINTK("EXIT\n"); | |
1834 | ||
1835 | return status ? IRQ_WAKE_THREAD : IRQ_NONE; | |
1836 | } | |
1837 | ||
1838 | irq_masked = irq_stat & hpriv->port_map; | |
1839 | ||
1840 | for (i = 0; i < host->n_ports; i++) { | |
1841 | struct ata_port *ap; | |
1842 | ||
1843 | if (!(irq_masked & (1 << i))) | |
1844 | continue; | |
1845 | ||
1846 | ap = host->ports[i]; | |
1847 | if (ap) { | |
1848 | ahci_hw_port_interrupt(ap); | |
1849 | VPRINTK("port %u\n", i); | |
1850 | } else { | |
1851 | VPRINTK("port %u (no irq)\n", i); | |
1852 | if (ata_ratelimit()) | |
1853 | dev_warn(host->dev, | |
1854 | "interrupt on disabled port %u\n", i); | |
1855 | } | |
1856 | } | |
1857 | ||
1858 | writel(irq_stat, mmio + HOST_IRQ_STAT); | |
1859 | ||
1860 | spin_unlock(&host->lock); | |
1861 | ||
1862 | VPRINTK("EXIT\n"); | |
1863 | ||
1864 | return IRQ_WAKE_THREAD; | |
1865 | } | |
1866 | EXPORT_SYMBOL_GPL(ahci_hw_interrupt); | |
1867 | ||
365cfa1e AV |
1868 | irqreturn_t ahci_interrupt(int irq, void *dev_instance) |
1869 | { | |
1870 | struct ata_host *host = dev_instance; | |
1871 | struct ahci_host_priv *hpriv; | |
1872 | unsigned int i, handled = 0; | |
1873 | void __iomem *mmio; | |
1874 | u32 irq_stat, irq_masked; | |
1875 | ||
1876 | VPRINTK("ENTER\n"); | |
1877 | ||
1878 | hpriv = host->private_data; | |
1879 | mmio = hpriv->mmio; | |
1880 | ||
1881 | /* sigh. 0xffffffff is a valid return from h/w */ | |
1882 | irq_stat = readl(mmio + HOST_IRQ_STAT); | |
1883 | if (!irq_stat) | |
1884 | return IRQ_NONE; | |
1885 | ||
1886 | irq_masked = irq_stat & hpriv->port_map; | |
1887 | ||
1888 | spin_lock(&host->lock); | |
1889 | ||
1890 | for (i = 0; i < host->n_ports; i++) { | |
1891 | struct ata_port *ap; | |
1892 | ||
1893 | if (!(irq_masked & (1 << i))) | |
1894 | continue; | |
1895 | ||
1896 | ap = host->ports[i]; | |
1897 | if (ap) { | |
1898 | ahci_port_intr(ap); | |
1899 | VPRINTK("port %u\n", i); | |
1900 | } else { | |
1901 | VPRINTK("port %u (no irq)\n", i); | |
1902 | if (ata_ratelimit()) | |
a44fec1f JP |
1903 | dev_warn(host->dev, |
1904 | "interrupt on disabled port %u\n", i); | |
365cfa1e AV |
1905 | } |
1906 | ||
1907 | handled = 1; | |
1908 | } | |
1909 | ||
1910 | /* HOST_IRQ_STAT behaves as level triggered latch meaning that | |
1911 | * it should be cleared after all the port events are cleared; | |
1912 | * otherwise, it will raise a spurious interrupt after each | |
1913 | * valid one. Please read section 10.6.2 of ahci 1.1 for more | |
1914 | * information. | |
1915 | * | |
1916 | * Also, use the unmasked value to clear interrupt as spurious | |
1917 | * pending event on a dummy port might cause screaming IRQ. | |
1918 | */ | |
1919 | writel(irq_stat, mmio + HOST_IRQ_STAT); | |
1920 | ||
1921 | spin_unlock(&host->lock); | |
1922 | ||
1923 | VPRINTK("EXIT\n"); | |
1924 | ||
1925 | return IRQ_RETVAL(handled); | |
1926 | } | |
1927 | EXPORT_SYMBOL_GPL(ahci_interrupt); | |
1928 | ||
1929 | static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc) | |
1930 | { | |
1931 | struct ata_port *ap = qc->ap; | |
1932 | void __iomem *port_mmio = ahci_port_base(ap); | |
1933 | struct ahci_port_priv *pp = ap->private_data; | |
1934 | ||
1935 | /* Keep track of the currently active link. It will be used | |
1936 | * in completion path to determine whether NCQ phase is in | |
1937 | * progress. | |
1938 | */ | |
1939 | pp->active_link = qc->dev->link; | |
1940 | ||
1941 | if (qc->tf.protocol == ATA_PROT_NCQ) | |
1942 | writel(1 << qc->tag, port_mmio + PORT_SCR_ACT); | |
1943 | ||
1944 | if (pp->fbs_enabled && pp->fbs_last_dev != qc->dev->link->pmp) { | |
1945 | u32 fbs = readl(port_mmio + PORT_FBS); | |
1946 | fbs &= ~(PORT_FBS_DEV_MASK | PORT_FBS_DEC); | |
1947 | fbs |= qc->dev->link->pmp << PORT_FBS_DEV_OFFSET; | |
1948 | writel(fbs, port_mmio + PORT_FBS); | |
1949 | pp->fbs_last_dev = qc->dev->link->pmp; | |
1950 | } | |
1951 | ||
1952 | writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE); | |
1953 | ||
1954 | ahci_sw_activity(qc->dev->link); | |
1955 | ||
1956 | return 0; | |
1957 | } | |
1958 | ||
1959 | static bool ahci_qc_fill_rtf(struct ata_queued_cmd *qc) | |
1960 | { | |
1961 | struct ahci_port_priv *pp = qc->ap->private_data; | |
6ad60195 | 1962 | u8 *rx_fis = pp->rx_fis; |
365cfa1e AV |
1963 | |
1964 | if (pp->fbs_enabled) | |
6ad60195 TH |
1965 | rx_fis += qc->dev->link->pmp * AHCI_RX_FIS_SZ; |
1966 | ||
1967 | /* | |
1968 | * After a successful execution of an ATA PIO data-in command, | |
1969 | * the device doesn't send D2H Reg FIS to update the TF and | |
1970 | * the host should take TF and E_Status from the preceding PIO | |
1971 | * Setup FIS. | |
1972 | */ | |
1973 | if (qc->tf.protocol == ATA_PROT_PIO && qc->dma_dir == DMA_FROM_DEVICE && | |
1974 | !(qc->flags & ATA_QCFLAG_FAILED)) { | |
1975 | ata_tf_from_fis(rx_fis + RX_FIS_PIO_SETUP, &qc->result_tf); | |
1976 | qc->result_tf.command = (rx_fis + RX_FIS_PIO_SETUP)[15]; | |
1977 | } else | |
1978 | ata_tf_from_fis(rx_fis + RX_FIS_D2H_REG, &qc->result_tf); | |
365cfa1e | 1979 | |
365cfa1e AV |
1980 | return true; |
1981 | } | |
1982 | ||
1983 | static void ahci_freeze(struct ata_port *ap) | |
1984 | { | |
1985 | void __iomem *port_mmio = ahci_port_base(ap); | |
1986 | ||
1987 | /* turn IRQ off */ | |
1988 | writel(0, port_mmio + PORT_IRQ_MASK); | |
1989 | } | |
1990 | ||
1991 | static void ahci_thaw(struct ata_port *ap) | |
1992 | { | |
1993 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
1994 | void __iomem *mmio = hpriv->mmio; | |
1995 | void __iomem *port_mmio = ahci_port_base(ap); | |
1996 | u32 tmp; | |
1997 | struct ahci_port_priv *pp = ap->private_data; | |
1998 | ||
1999 | /* clear IRQ */ | |
2000 | tmp = readl(port_mmio + PORT_IRQ_STAT); | |
2001 | writel(tmp, port_mmio + PORT_IRQ_STAT); | |
2002 | writel(1 << ap->port_no, mmio + HOST_IRQ_STAT); | |
2003 | ||
2004 | /* turn IRQ back on */ | |
2005 | writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); | |
2006 | } | |
2007 | ||
8b789d89 | 2008 | void ahci_error_handler(struct ata_port *ap) |
365cfa1e AV |
2009 | { |
2010 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) { | |
2011 | /* restart engine */ | |
2012 | ahci_stop_engine(ap); | |
2013 | ahci_start_engine(ap); | |
2014 | } | |
2015 | ||
2016 | sata_pmp_error_handler(ap); | |
0ee71952 TH |
2017 | |
2018 | if (!ata_dev_enabled(ap->link.device)) | |
2019 | ahci_stop_engine(ap); | |
365cfa1e | 2020 | } |
8b789d89 | 2021 | EXPORT_SYMBOL_GPL(ahci_error_handler); |
365cfa1e AV |
2022 | |
2023 | static void ahci_post_internal_cmd(struct ata_queued_cmd *qc) | |
2024 | { | |
2025 | struct ata_port *ap = qc->ap; | |
2026 | ||
2027 | /* make DMA engine forget about the failed command */ | |
2028 | if (qc->flags & ATA_QCFLAG_FAILED) | |
2029 | ahci_kick_engine(ap); | |
2030 | } | |
2031 | ||
65fe1f0f SH |
2032 | static void ahci_set_aggressive_devslp(struct ata_port *ap, bool sleep) |
2033 | { | |
2034 | void __iomem *port_mmio = ahci_port_base(ap); | |
2035 | struct ata_device *dev = ap->link.device; | |
2036 | u32 devslp, dm, dito, mdat, deto; | |
2037 | int rc; | |
2038 | unsigned int err_mask; | |
2039 | ||
2040 | devslp = readl(port_mmio + PORT_DEVSLP); | |
2041 | if (!(devslp & PORT_DEVSLP_DSP)) { | |
2042 | dev_err(ap->host->dev, "port does not support device sleep\n"); | |
2043 | return; | |
2044 | } | |
2045 | ||
2046 | /* disable device sleep */ | |
2047 | if (!sleep) { | |
2048 | if (devslp & PORT_DEVSLP_ADSE) { | |
2049 | writel(devslp & ~PORT_DEVSLP_ADSE, | |
2050 | port_mmio + PORT_DEVSLP); | |
2051 | err_mask = ata_dev_set_feature(dev, | |
2052 | SETFEATURES_SATA_DISABLE, | |
2053 | SATA_DEVSLP); | |
2054 | if (err_mask && err_mask != AC_ERR_DEV) | |
2055 | ata_dev_warn(dev, "failed to disable DEVSLP\n"); | |
2056 | } | |
2057 | return; | |
2058 | } | |
2059 | ||
2060 | /* device sleep was already enabled */ | |
2061 | if (devslp & PORT_DEVSLP_ADSE) | |
2062 | return; | |
2063 | ||
2064 | /* set DITO, MDAT, DETO and enable DevSlp, need to stop engine first */ | |
2065 | rc = ahci_stop_engine(ap); | |
2066 | if (rc) | |
2067 | return; | |
2068 | ||
2069 | dm = (devslp & PORT_DEVSLP_DM_MASK) >> PORT_DEVSLP_DM_OFFSET; | |
2070 | dito = devslp_idle_timeout / (dm + 1); | |
2071 | if (dito > 0x3ff) | |
2072 | dito = 0x3ff; | |
2073 | ||
2074 | /* Use the nominal value 10 ms if the read MDAT is zero, | |
2075 | * the nominal value of DETO is 20 ms. | |
2076 | */ | |
803739d2 | 2077 | if (dev->devslp_timing[ATA_LOG_DEVSLP_VALID] & |
65fe1f0f | 2078 | ATA_LOG_DEVSLP_VALID_MASK) { |
803739d2 | 2079 | mdat = dev->devslp_timing[ATA_LOG_DEVSLP_MDAT] & |
65fe1f0f SH |
2080 | ATA_LOG_DEVSLP_MDAT_MASK; |
2081 | if (!mdat) | |
2082 | mdat = 10; | |
803739d2 | 2083 | deto = dev->devslp_timing[ATA_LOG_DEVSLP_DETO]; |
65fe1f0f SH |
2084 | if (!deto) |
2085 | deto = 20; | |
2086 | } else { | |
2087 | mdat = 10; | |
2088 | deto = 20; | |
2089 | } | |
2090 | ||
2091 | devslp |= ((dito << PORT_DEVSLP_DITO_OFFSET) | | |
2092 | (mdat << PORT_DEVSLP_MDAT_OFFSET) | | |
2093 | (deto << PORT_DEVSLP_DETO_OFFSET) | | |
2094 | PORT_DEVSLP_ADSE); | |
2095 | writel(devslp, port_mmio + PORT_DEVSLP); | |
2096 | ||
2097 | ahci_start_engine(ap); | |
2098 | ||
2099 | /* enable device sleep feature for the drive */ | |
2100 | err_mask = ata_dev_set_feature(dev, | |
2101 | SETFEATURES_SATA_ENABLE, | |
2102 | SATA_DEVSLP); | |
2103 | if (err_mask && err_mask != AC_ERR_DEV) | |
2104 | ata_dev_warn(dev, "failed to enable DEVSLP\n"); | |
2105 | } | |
2106 | ||
365cfa1e AV |
2107 | static void ahci_enable_fbs(struct ata_port *ap) |
2108 | { | |
2109 | struct ahci_port_priv *pp = ap->private_data; | |
2110 | void __iomem *port_mmio = ahci_port_base(ap); | |
2111 | u32 fbs; | |
2112 | int rc; | |
2113 | ||
2114 | if (!pp->fbs_supported) | |
2115 | return; | |
2116 | ||
2117 | fbs = readl(port_mmio + PORT_FBS); | |
2118 | if (fbs & PORT_FBS_EN) { | |
2119 | pp->fbs_enabled = true; | |
2120 | pp->fbs_last_dev = -1; /* initialization */ | |
2121 | return; | |
2122 | } | |
2123 | ||
2124 | rc = ahci_stop_engine(ap); | |
2125 | if (rc) | |
2126 | return; | |
2127 | ||
2128 | writel(fbs | PORT_FBS_EN, port_mmio + PORT_FBS); | |
2129 | fbs = readl(port_mmio + PORT_FBS); | |
2130 | if (fbs & PORT_FBS_EN) { | |
a44fec1f | 2131 | dev_info(ap->host->dev, "FBS is enabled\n"); |
365cfa1e AV |
2132 | pp->fbs_enabled = true; |
2133 | pp->fbs_last_dev = -1; /* initialization */ | |
2134 | } else | |
a44fec1f | 2135 | dev_err(ap->host->dev, "Failed to enable FBS\n"); |
365cfa1e AV |
2136 | |
2137 | ahci_start_engine(ap); | |
2138 | } | |
2139 | ||
2140 | static void ahci_disable_fbs(struct ata_port *ap) | |
2141 | { | |
2142 | struct ahci_port_priv *pp = ap->private_data; | |
2143 | void __iomem *port_mmio = ahci_port_base(ap); | |
2144 | u32 fbs; | |
2145 | int rc; | |
2146 | ||
2147 | if (!pp->fbs_supported) | |
2148 | return; | |
2149 | ||
2150 | fbs = readl(port_mmio + PORT_FBS); | |
2151 | if ((fbs & PORT_FBS_EN) == 0) { | |
2152 | pp->fbs_enabled = false; | |
2153 | return; | |
2154 | } | |
2155 | ||
2156 | rc = ahci_stop_engine(ap); | |
2157 | if (rc) | |
2158 | return; | |
2159 | ||
2160 | writel(fbs & ~PORT_FBS_EN, port_mmio + PORT_FBS); | |
2161 | fbs = readl(port_mmio + PORT_FBS); | |
2162 | if (fbs & PORT_FBS_EN) | |
a44fec1f | 2163 | dev_err(ap->host->dev, "Failed to disable FBS\n"); |
365cfa1e | 2164 | else { |
a44fec1f | 2165 | dev_info(ap->host->dev, "FBS is disabled\n"); |
365cfa1e AV |
2166 | pp->fbs_enabled = false; |
2167 | } | |
2168 | ||
2169 | ahci_start_engine(ap); | |
2170 | } | |
2171 | ||
2172 | static void ahci_pmp_attach(struct ata_port *ap) | |
2173 | { | |
2174 | void __iomem *port_mmio = ahci_port_base(ap); | |
2175 | struct ahci_port_priv *pp = ap->private_data; | |
2176 | u32 cmd; | |
2177 | ||
2178 | cmd = readl(port_mmio + PORT_CMD); | |
2179 | cmd |= PORT_CMD_PMP; | |
2180 | writel(cmd, port_mmio + PORT_CMD); | |
2181 | ||
2182 | ahci_enable_fbs(ap); | |
2183 | ||
2184 | pp->intr_mask |= PORT_IRQ_BAD_PMP; | |
7b3a24c5 MB |
2185 | |
2186 | /* | |
2187 | * We must not change the port interrupt mask register if the | |
2188 | * port is marked frozen, the value in pp->intr_mask will be | |
2189 | * restored later when the port is thawed. | |
2190 | * | |
2191 | * Note that during initialization, the port is marked as | |
2192 | * frozen since the irq handler is not yet registered. | |
2193 | */ | |
2194 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
2195 | writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); | |
365cfa1e AV |
2196 | } |
2197 | ||
2198 | static void ahci_pmp_detach(struct ata_port *ap) | |
2199 | { | |
2200 | void __iomem *port_mmio = ahci_port_base(ap); | |
2201 | struct ahci_port_priv *pp = ap->private_data; | |
2202 | u32 cmd; | |
2203 | ||
2204 | ahci_disable_fbs(ap); | |
2205 | ||
2206 | cmd = readl(port_mmio + PORT_CMD); | |
2207 | cmd &= ~PORT_CMD_PMP; | |
2208 | writel(cmd, port_mmio + PORT_CMD); | |
2209 | ||
2210 | pp->intr_mask &= ~PORT_IRQ_BAD_PMP; | |
7b3a24c5 MB |
2211 | |
2212 | /* see comment above in ahci_pmp_attach() */ | |
2213 | if (!(ap->pflags & ATA_PFLAG_FROZEN)) | |
2214 | writel(pp->intr_mask, port_mmio + PORT_IRQ_MASK); | |
365cfa1e AV |
2215 | } |
2216 | ||
02cdfcf0 | 2217 | int ahci_port_resume(struct ata_port *ap) |
365cfa1e AV |
2218 | { |
2219 | ahci_power_up(ap); | |
2220 | ahci_start_port(ap); | |
2221 | ||
2222 | if (sata_pmp_attached(ap)) | |
2223 | ahci_pmp_attach(ap); | |
2224 | else | |
2225 | ahci_pmp_detach(ap); | |
2226 | ||
2227 | return 0; | |
2228 | } | |
02cdfcf0 | 2229 | EXPORT_SYMBOL_GPL(ahci_port_resume); |
365cfa1e AV |
2230 | |
2231 | #ifdef CONFIG_PM | |
2232 | static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg) | |
2233 | { | |
2234 | const char *emsg = NULL; | |
2235 | int rc; | |
2236 | ||
2237 | rc = ahci_deinit_port(ap, &emsg); | |
2238 | if (rc == 0) | |
2239 | ahci_power_down(ap); | |
2240 | else { | |
a9a79dfe | 2241 | ata_port_err(ap, "%s (%d)\n", emsg, rc); |
7faa33da | 2242 | ata_port_freeze(ap); |
365cfa1e AV |
2243 | } |
2244 | ||
2245 | return rc; | |
2246 | } | |
2247 | #endif | |
2248 | ||
2249 | static int ahci_port_start(struct ata_port *ap) | |
2250 | { | |
2251 | struct ahci_host_priv *hpriv = ap->host->private_data; | |
2252 | struct device *dev = ap->host->dev; | |
2253 | struct ahci_port_priv *pp; | |
2254 | void *mem; | |
2255 | dma_addr_t mem_dma; | |
2256 | size_t dma_sz, rx_fis_sz; | |
2257 | ||
2258 | pp = devm_kzalloc(dev, sizeof(*pp), GFP_KERNEL); | |
2259 | if (!pp) | |
2260 | return -ENOMEM; | |
2261 | ||
b29900e6 AG |
2262 | if (ap->host->n_ports > 1) { |
2263 | pp->irq_desc = devm_kzalloc(dev, 8, GFP_KERNEL); | |
2264 | if (!pp->irq_desc) { | |
2265 | devm_kfree(dev, pp); | |
2266 | return -ENOMEM; | |
2267 | } | |
2268 | snprintf(pp->irq_desc, 8, | |
2269 | "%s%d", dev_driver_string(dev), ap->port_no); | |
2270 | } | |
2271 | ||
365cfa1e AV |
2272 | /* check FBS capability */ |
2273 | if ((hpriv->cap & HOST_CAP_FBS) && sata_pmp_supported(ap)) { | |
2274 | void __iomem *port_mmio = ahci_port_base(ap); | |
2275 | u32 cmd = readl(port_mmio + PORT_CMD); | |
2276 | if (cmd & PORT_CMD_FBSCP) | |
2277 | pp->fbs_supported = true; | |
5f173107 | 2278 | else if (hpriv->flags & AHCI_HFLAG_YES_FBS) { |
a44fec1f JP |
2279 | dev_info(dev, "port %d can do FBS, forcing FBSCP\n", |
2280 | ap->port_no); | |
5f173107 TH |
2281 | pp->fbs_supported = true; |
2282 | } else | |
a44fec1f JP |
2283 | dev_warn(dev, "port %d is not capable of FBS\n", |
2284 | ap->port_no); | |
365cfa1e AV |
2285 | } |
2286 | ||
2287 | if (pp->fbs_supported) { | |
2288 | dma_sz = AHCI_PORT_PRIV_FBS_DMA_SZ; | |
2289 | rx_fis_sz = AHCI_RX_FIS_SZ * 16; | |
2290 | } else { | |
2291 | dma_sz = AHCI_PORT_PRIV_DMA_SZ; | |
2292 | rx_fis_sz = AHCI_RX_FIS_SZ; | |
2293 | } | |
2294 | ||
2295 | mem = dmam_alloc_coherent(dev, dma_sz, &mem_dma, GFP_KERNEL); | |
2296 | if (!mem) | |
2297 | return -ENOMEM; | |
2298 | memset(mem, 0, dma_sz); | |
2299 | ||
2300 | /* | |
2301 | * First item in chunk of DMA memory: 32-slot command table, | |
2302 | * 32 bytes each in size | |
2303 | */ | |
2304 | pp->cmd_slot = mem; | |
2305 | pp->cmd_slot_dma = mem_dma; | |
2306 | ||
2307 | mem += AHCI_CMD_SLOT_SZ; | |
2308 | mem_dma += AHCI_CMD_SLOT_SZ; | |
2309 | ||
2310 | /* | |
2311 | * Second item: Received-FIS area | |
2312 | */ | |
2313 | pp->rx_fis = mem; | |
2314 | pp->rx_fis_dma = mem_dma; | |
2315 | ||
2316 | mem += rx_fis_sz; | |
2317 | mem_dma += rx_fis_sz; | |
2318 | ||
2319 | /* | |
2320 | * Third item: data area for storing a single command | |
2321 | * and its scatter-gather table | |
2322 | */ | |
2323 | pp->cmd_tbl = mem; | |
2324 | pp->cmd_tbl_dma = mem_dma; | |
2325 | ||
2326 | /* | |
2327 | * Save off initial list of interrupts to be enabled. | |
2328 | * This could be changed later | |
2329 | */ | |
2330 | pp->intr_mask = DEF_PORT_IRQ; | |
2331 | ||
5ca72c4f AG |
2332 | /* |
2333 | * Switch to per-port locking in case each port has its own MSI vector. | |
2334 | */ | |
2335 | if ((hpriv->flags & AHCI_HFLAG_MULTI_MSI)) { | |
2336 | spin_lock_init(&pp->lock); | |
2337 | ap->lock = &pp->lock; | |
2338 | } | |
2339 | ||
365cfa1e AV |
2340 | ap->private_data = pp; |
2341 | ||
2342 | /* engage engines, captain */ | |
2343 | return ahci_port_resume(ap); | |
2344 | } | |
2345 | ||
2346 | static void ahci_port_stop(struct ata_port *ap) | |
2347 | { | |
2348 | const char *emsg = NULL; | |
2349 | int rc; | |
2350 | ||
2351 | /* de-initialize port */ | |
2352 | rc = ahci_deinit_port(ap, &emsg); | |
2353 | if (rc) | |
a9a79dfe | 2354 | ata_port_warn(ap, "%s (%d)\n", emsg, rc); |
365cfa1e AV |
2355 | } |
2356 | ||
2357 | void ahci_print_info(struct ata_host *host, const char *scc_s) | |
2358 | { | |
2359 | struct ahci_host_priv *hpriv = host->private_data; | |
2360 | void __iomem *mmio = hpriv->mmio; | |
2361 | u32 vers, cap, cap2, impl, speed; | |
2362 | const char *speed_s; | |
2363 | ||
2364 | vers = readl(mmio + HOST_VERSION); | |
2365 | cap = hpriv->cap; | |
2366 | cap2 = hpriv->cap2; | |
2367 | impl = hpriv->port_map; | |
2368 | ||
2369 | speed = (cap >> 20) & 0xf; | |
2370 | if (speed == 1) | |
2371 | speed_s = "1.5"; | |
2372 | else if (speed == 2) | |
2373 | speed_s = "3"; | |
2374 | else if (speed == 3) | |
2375 | speed_s = "6"; | |
2376 | else | |
2377 | speed_s = "?"; | |
2378 | ||
2379 | dev_info(host->dev, | |
2380 | "AHCI %02x%02x.%02x%02x " | |
2381 | "%u slots %u ports %s Gbps 0x%x impl %s mode\n" | |
2382 | , | |
2383 | ||
2384 | (vers >> 24) & 0xff, | |
2385 | (vers >> 16) & 0xff, | |
2386 | (vers >> 8) & 0xff, | |
2387 | vers & 0xff, | |
2388 | ||
2389 | ((cap >> 8) & 0x1f) + 1, | |
2390 | (cap & 0x1f) + 1, | |
2391 | speed_s, | |
2392 | impl, | |
2393 | scc_s); | |
2394 | ||
2395 | dev_info(host->dev, | |
2396 | "flags: " | |
2397 | "%s%s%s%s%s%s%s" | |
2398 | "%s%s%s%s%s%s%s" | |
65fe1f0f SH |
2399 | "%s%s%s%s%s%s%s" |
2400 | "%s%s\n" | |
365cfa1e AV |
2401 | , |
2402 | ||
2403 | cap & HOST_CAP_64 ? "64bit " : "", | |
2404 | cap & HOST_CAP_NCQ ? "ncq " : "", | |
2405 | cap & HOST_CAP_SNTF ? "sntf " : "", | |
2406 | cap & HOST_CAP_MPS ? "ilck " : "", | |
2407 | cap & HOST_CAP_SSS ? "stag " : "", | |
2408 | cap & HOST_CAP_ALPM ? "pm " : "", | |
2409 | cap & HOST_CAP_LED ? "led " : "", | |
2410 | cap & HOST_CAP_CLO ? "clo " : "", | |
2411 | cap & HOST_CAP_ONLY ? "only " : "", | |
2412 | cap & HOST_CAP_PMP ? "pmp " : "", | |
2413 | cap & HOST_CAP_FBS ? "fbs " : "", | |
2414 | cap & HOST_CAP_PIO_MULTI ? "pio " : "", | |
2415 | cap & HOST_CAP_SSC ? "slum " : "", | |
2416 | cap & HOST_CAP_PART ? "part " : "", | |
2417 | cap & HOST_CAP_CCC ? "ccc " : "", | |
2418 | cap & HOST_CAP_EMS ? "ems " : "", | |
2419 | cap & HOST_CAP_SXS ? "sxs " : "", | |
65fe1f0f SH |
2420 | cap2 & HOST_CAP2_DESO ? "deso " : "", |
2421 | cap2 & HOST_CAP2_SADM ? "sadm " : "", | |
2422 | cap2 & HOST_CAP2_SDS ? "sds " : "", | |
365cfa1e AV |
2423 | cap2 & HOST_CAP2_APST ? "apst " : "", |
2424 | cap2 & HOST_CAP2_NVMHCI ? "nvmp " : "", | |
2425 | cap2 & HOST_CAP2_BOH ? "boh " : "" | |
2426 | ); | |
2427 | } | |
2428 | EXPORT_SYMBOL_GPL(ahci_print_info); | |
2429 | ||
2430 | void ahci_set_em_messages(struct ahci_host_priv *hpriv, | |
2431 | struct ata_port_info *pi) | |
2432 | { | |
2433 | u8 messages; | |
2434 | void __iomem *mmio = hpriv->mmio; | |
2435 | u32 em_loc = readl(mmio + HOST_EM_LOC); | |
2436 | u32 em_ctl = readl(mmio + HOST_EM_CTL); | |
2437 | ||
2438 | if (!ahci_em_messages || !(hpriv->cap & HOST_CAP_EMS)) | |
2439 | return; | |
2440 | ||
2441 | messages = (em_ctl & EM_CTRL_MSG_TYPE) >> 16; | |
2442 | ||
008dbd61 | 2443 | if (messages) { |
365cfa1e AV |
2444 | /* store em_loc */ |
2445 | hpriv->em_loc = ((em_loc >> 16) * 4); | |
c0623166 | 2446 | hpriv->em_buf_sz = ((em_loc & 0xff) * 4); |
008dbd61 | 2447 | hpriv->em_msg_type = messages; |
365cfa1e AV |
2448 | pi->flags |= ATA_FLAG_EM; |
2449 | if (!(em_ctl & EM_CTL_ALHD)) | |
2450 | pi->flags |= ATA_FLAG_SW_ACTIVITY; | |
2451 | } | |
2452 | } | |
2453 | EXPORT_SYMBOL_GPL(ahci_set_em_messages); | |
2454 | ||
2455 | MODULE_AUTHOR("Jeff Garzik"); | |
2456 | MODULE_DESCRIPTION("Common AHCI SATA low-level routines"); | |
2457 | MODULE_LICENSE("GPL"); |