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authorKristen Carlson Accardi <kristen.c.accardi@intel.com>2008-06-03 13:33:55 -0400
committerJeff Garzik <jgarzik@redhat.com>2008-07-14 15:59:33 -0400
commit18f7ba4c2f4be6b37d925931f04d6cc28d88d1ee (patch)
tree4f127510c378cba33e79d5fb71bd9fc14a28e1cb
parent87fbc5a060faf2394bee88a93519f9b9d434727c (diff)
libata/ahci: enclosure management support
Add Enclosure Management support to libata and ahci. Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@intel.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
-rw-r--r--drivers/ata/ahci.c321
-rw-r--r--drivers/ata/libata-scsi.c79
-rw-r--r--include/linux/libata.h21
3 files changed, 419 insertions, 2 deletions
diff --git a/drivers/ata/ahci.c b/drivers/ata/ahci.c
index 5e6468a7ca4b..65d4e968feb4 100644
--- a/drivers/ata/ahci.c
+++ b/drivers/ata/ahci.c
@@ -56,6 +56,12 @@ MODULE_PARM_DESC(skip_host_reset, "skip global host reset (0=don't skip, 1=skip)
56static int ahci_enable_alpm(struct ata_port *ap, 56static int ahci_enable_alpm(struct ata_port *ap,
57 enum link_pm policy); 57 enum link_pm policy);
58static void ahci_disable_alpm(struct ata_port *ap); 58static void ahci_disable_alpm(struct ata_port *ap);
59static ssize_t ahci_led_show(struct ata_port *ap, char *buf);
60static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
61 size_t size);
62static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
63 ssize_t size);
64#define MAX_SLOTS 8
59 65
60enum { 66enum {
61 AHCI_PCI_BAR = 5, 67 AHCI_PCI_BAR = 5,
@@ -98,6 +104,8 @@ enum {
98 HOST_IRQ_STAT = 0x08, /* interrupt status */ 104 HOST_IRQ_STAT = 0x08, /* interrupt status */
99 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */ 105 HOST_PORTS_IMPL = 0x0c, /* bitmap of implemented ports */
100 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */ 106 HOST_VERSION = 0x10, /* AHCI spec. version compliancy */
107 HOST_EM_LOC = 0x1c, /* Enclosure Management location */
108 HOST_EM_CTL = 0x20, /* Enclosure Management Control */
101 109
102 /* HOST_CTL bits */ 110 /* HOST_CTL bits */
103 HOST_RESET = (1 << 0), /* reset controller; self-clear */ 111 HOST_RESET = (1 << 0), /* reset controller; self-clear */
@@ -105,6 +113,7 @@ enum {
105 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */ 113 HOST_AHCI_EN = (1 << 31), /* AHCI enabled */
106 114
107 /* HOST_CAP bits */ 115 /* HOST_CAP bits */
116 HOST_CAP_EMS = (1 << 6), /* Enclosure Management support */
108 HOST_CAP_SSC = (1 << 14), /* Slumber capable */ 117 HOST_CAP_SSC = (1 << 14), /* Slumber capable */
109 HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */ 118 HOST_CAP_PMP = (1 << 17), /* Port Multiplier support */
110 HOST_CAP_CLO = (1 << 24), /* Command List Override support */ 119 HOST_CAP_CLO = (1 << 24), /* Command List Override support */
@@ -202,6 +211,11 @@ enum {
202 ATA_FLAG_IPM, 211 ATA_FLAG_IPM,
203 212
204 ICH_MAP = 0x90, /* ICH MAP register */ 213 ICH_MAP = 0x90, /* ICH MAP register */
214
215 /* em_ctl bits */
216 EM_CTL_RST = (1 << 9), /* Reset */
217 EM_CTL_TM = (1 << 8), /* Transmit Message */
218 EM_CTL_ALHD = (1 << 26), /* Activity LED */
205}; 219};
206 220
207struct ahci_cmd_hdr { 221struct ahci_cmd_hdr {
@@ -219,12 +233,21 @@ struct ahci_sg {
219 __le32 flags_size; 233 __le32 flags_size;
220}; 234};
221 235
236struct ahci_em_priv {
237 enum sw_activity blink_policy;
238 struct timer_list timer;
239 unsigned long saved_activity;
240 unsigned long activity;
241 unsigned long led_state;
242};
243
222struct ahci_host_priv { 244struct ahci_host_priv {
223 unsigned int flags; /* AHCI_HFLAG_* */ 245 unsigned int flags; /* AHCI_HFLAG_* */
224 u32 cap; /* cap to use */ 246 u32 cap; /* cap to use */
225 u32 port_map; /* port map to use */ 247 u32 port_map; /* port map to use */
226 u32 saved_cap; /* saved initial cap */ 248 u32 saved_cap; /* saved initial cap */
227 u32 saved_port_map; /* saved initial port_map */ 249 u32 saved_port_map; /* saved initial port_map */
250 u32 em_loc; /* enclosure management location */
228}; 251};
229 252
230struct ahci_port_priv { 253struct ahci_port_priv {
@@ -240,6 +263,8 @@ struct ahci_port_priv {
240 unsigned int ncq_saw_dmas:1; 263 unsigned int ncq_saw_dmas:1;
241 unsigned int ncq_saw_sdb:1; 264 unsigned int ncq_saw_sdb:1;
242 u32 intr_mask; /* interrupts to enable */ 265 u32 intr_mask; /* interrupts to enable */
266 struct ahci_em_priv em_priv[MAX_SLOTS];/* enclosure management info
267 * per PM slot */
243}; 268};
244 269
245static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val); 270static int ahci_scr_read(struct ata_port *ap, unsigned int sc_reg, u32 *val);
@@ -277,9 +302,20 @@ static int ahci_port_suspend(struct ata_port *ap, pm_message_t mesg);
277static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg); 302static int ahci_pci_device_suspend(struct pci_dev *pdev, pm_message_t mesg);
278static int ahci_pci_device_resume(struct pci_dev *pdev); 303static int ahci_pci_device_resume(struct pci_dev *pdev);
279#endif 304#endif
305static ssize_t ahci_activity_show(struct ata_device *dev, char *buf);
306static ssize_t ahci_activity_store(struct ata_device *dev,
307 enum sw_activity val);
308static void ahci_init_sw_activity(struct ata_link *link);
280 309
281static struct device_attribute *ahci_shost_attrs[] = { 310static struct device_attribute *ahci_shost_attrs[] = {
282 &dev_attr_link_power_management_policy, 311 &dev_attr_link_power_management_policy,
312 &dev_attr_em_message_type,
313 &dev_attr_em_message,
314 NULL
315};
316
317static struct device_attribute *ahci_sdev_attrs[] = {
318 &dev_attr_sw_activity,
283 NULL 319 NULL
284}; 320};
285 321
@@ -289,6 +325,7 @@ static struct scsi_host_template ahci_sht = {
289 .sg_tablesize = AHCI_MAX_SG, 325 .sg_tablesize = AHCI_MAX_SG,
290 .dma_boundary = AHCI_DMA_BOUNDARY, 326 .dma_boundary = AHCI_DMA_BOUNDARY,
291 .shost_attrs = ahci_shost_attrs, 327 .shost_attrs = ahci_shost_attrs,
328 .sdev_attrs = ahci_sdev_attrs,
292}; 329};
293 330
294static struct ata_port_operations ahci_ops = { 331static struct ata_port_operations ahci_ops = {
@@ -316,6 +353,10 @@ static struct ata_port_operations ahci_ops = {
316 353
317 .enable_pm = ahci_enable_alpm, 354 .enable_pm = ahci_enable_alpm,
318 .disable_pm = ahci_disable_alpm, 355 .disable_pm = ahci_disable_alpm,
356 .em_show = ahci_led_show,
357 .em_store = ahci_led_store,
358 .sw_activity_show = ahci_activity_show,
359 .sw_activity_store = ahci_activity_store,
319#ifdef CONFIG_PM 360#ifdef CONFIG_PM
320 .port_suspend = ahci_port_suspend, 361 .port_suspend = ahci_port_suspend,
321 .port_resume = ahci_port_resume, 362 .port_resume = ahci_port_resume,
@@ -561,6 +602,11 @@ static struct pci_driver ahci_pci_driver = {
561#endif 602#endif
562}; 603};
563 604
605static int ahci_em_messages = 1;
606module_param(ahci_em_messages, int, 0444);
607/* add other LED protocol types when they become supported */
608MODULE_PARM_DESC(ahci_em_messages,
609 "Set AHCI Enclosure Management Message type (0 = disabled, 1 = LED");
564 610
565static inline int ahci_nr_ports(u32 cap) 611static inline int ahci_nr_ports(u32 cap)
566{ 612{
@@ -1031,11 +1077,28 @@ static void ahci_power_down(struct ata_port *ap)
1031 1077
1032static void ahci_start_port(struct ata_port *ap) 1078static void ahci_start_port(struct ata_port *ap)
1033{ 1079{
1080 struct ahci_port_priv *pp = ap->private_data;
1081 struct ata_link *link;
1082 struct ahci_em_priv *emp;
1083
1034 /* enable FIS reception */ 1084 /* enable FIS reception */
1035 ahci_start_fis_rx(ap); 1085 ahci_start_fis_rx(ap);
1036 1086
1037 /* enable DMA */ 1087 /* enable DMA */
1038 ahci_start_engine(ap); 1088 ahci_start_engine(ap);
1089
1090 /* turn on LEDs */
1091 if (ap->flags & ATA_FLAG_EM) {
1092 ata_port_for_each_link(link, ap) {
1093 emp = &pp->em_priv[link->pmp];
1094 ahci_transmit_led_message(ap, emp->led_state, 4);
1095 }
1096 }
1097
1098 if (ap->flags & ATA_FLAG_SW_ACTIVITY)
1099 ata_port_for_each_link(link, ap)
1100 ahci_init_sw_activity(link);
1101
1039} 1102}
1040 1103
1041static int ahci_deinit_port(struct ata_port *ap, const char **emsg) 1104static int ahci_deinit_port(struct ata_port *ap, const char **emsg)
@@ -1116,6 +1179,230 @@ static int ahci_reset_controller(struct ata_host *host)
1116 return 0; 1179 return 0;
1117} 1180}
1118 1181
1182static void ahci_sw_activity(struct ata_link *link)
1183{
1184 struct ata_port *ap = link->ap;
1185 struct ahci_port_priv *pp = ap->private_data;
1186 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1187
1188 if (!(link->flags & ATA_LFLAG_SW_ACTIVITY))
1189 return;
1190
1191 emp->activity++;
1192 if (!timer_pending(&emp->timer))
1193 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(10));
1194}
1195
1196static void ahci_sw_activity_blink(unsigned long arg)
1197{
1198 struct ata_link *link = (struct ata_link *)arg;
1199 struct ata_port *ap = link->ap;
1200 struct ahci_port_priv *pp = ap->private_data;
1201 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1202 unsigned long led_message = emp->led_state;
1203 u32 activity_led_state;
1204
1205 led_message &= 0xffff0000;
1206 led_message |= ap->port_no | (link->pmp << 8);
1207
1208 /* check to see if we've had activity. If so,
1209 * toggle state of LED and reset timer. If not,
1210 * turn LED to desired idle state.
1211 */
1212 if (emp->saved_activity != emp->activity) {
1213 emp->saved_activity = emp->activity;
1214 /* get the current LED state */
1215 activity_led_state = led_message & 0x00010000;
1216
1217 if (activity_led_state)
1218 activity_led_state = 0;
1219 else
1220 activity_led_state = 1;
1221
1222 /* clear old state */
1223 led_message &= 0xfff8ffff;
1224
1225 /* toggle state */
1226 led_message |= (activity_led_state << 16);
1227 mod_timer(&emp->timer, jiffies + msecs_to_jiffies(100));
1228 } else {
1229 /* switch to idle */
1230 led_message &= 0xfff8ffff;
1231 if (emp->blink_policy == BLINK_OFF)
1232 led_message |= (1 << 16);
1233 }
1234 ahci_transmit_led_message(ap, led_message, 4);
1235}
1236
1237static void ahci_init_sw_activity(struct ata_link *link)
1238{
1239 struct ata_port *ap = link->ap;
1240 struct ahci_port_priv *pp = ap->private_data;
1241 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1242
1243 /* init activity stats, setup timer */
1244 emp->saved_activity = emp->activity = 0;
1245 setup_timer(&emp->timer, ahci_sw_activity_blink, (unsigned long)link);
1246
1247 /* check our blink policy and set flag for link if it's enabled */
1248 if (emp->blink_policy)
1249 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1250}
1251
1252static int ahci_reset_em(struct ata_host *host)
1253{
1254 void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
1255 u32 em_ctl;
1256
1257 em_ctl = readl(mmio + HOST_EM_CTL);
1258 if ((em_ctl & EM_CTL_TM) || (em_ctl & EM_CTL_RST))
1259 return -EINVAL;
1260
1261 writel(em_ctl | EM_CTL_RST, mmio + HOST_EM_CTL);
1262 return 0;
1263}
1264
1265static ssize_t ahci_transmit_led_message(struct ata_port *ap, u32 state,
1266 ssize_t size)
1267{
1268 struct ahci_host_priv *hpriv = ap->host->private_data;
1269 struct ahci_port_priv *pp = ap->private_data;
1270 void __iomem *mmio = ap->host->iomap[AHCI_PCI_BAR];
1271 u32 em_ctl;
1272 u32 message[] = {0, 0};
1273 unsigned int flags;
1274 int pmp;
1275 struct ahci_em_priv *emp;
1276
1277 /* get the slot number from the message */
1278 pmp = (state & 0x0000ff00) >> 8;
1279 if (pmp < MAX_SLOTS)
1280 emp = &pp->em_priv[pmp];
1281 else
1282 return -EINVAL;
1283
1284 spin_lock_irqsave(ap->lock, flags);
1285
1286 /*
1287 * if we are still busy transmitting a previous message,
1288 * do not allow
1289 */
1290 em_ctl = readl(mmio + HOST_EM_CTL);
1291 if (em_ctl & EM_CTL_TM) {
1292 spin_unlock_irqrestore(ap->lock, flags);
1293 return -EINVAL;
1294 }
1295
1296 /*
1297 * create message header - this is all zero except for
1298 * the message size, which is 4 bytes.
1299 */
1300 message[0] |= (4 << 8);
1301
1302 /* ignore 0:4 of byte zero, fill in port info yourself */
1303 message[1] = ((state & 0xfffffff0) | ap->port_no);
1304
1305 /* write message to EM_LOC */
1306 writel(message[0], mmio + hpriv->em_loc);
1307 writel(message[1], mmio + hpriv->em_loc+4);
1308
1309 /* save off new led state for port/slot */
1310 emp->led_state = message[1];
1311
1312 /*
1313 * tell hardware to transmit the message
1314 */
1315 writel(em_ctl | EM_CTL_TM, mmio + HOST_EM_CTL);
1316
1317 spin_unlock_irqrestore(ap->lock, flags);
1318 return size;
1319}
1320
1321static ssize_t ahci_led_show(struct ata_port *ap, char *buf)
1322{
1323 struct ahci_port_priv *pp = ap->private_data;
1324 struct ata_link *link;
1325 struct ahci_em_priv *emp;
1326 int rc = 0;
1327
1328 ata_port_for_each_link(link, ap) {
1329 emp = &pp->em_priv[link->pmp];
1330 rc += sprintf(buf, "%lx\n", emp->led_state);
1331 }
1332 return rc;
1333}
1334
1335static ssize_t ahci_led_store(struct ata_port *ap, const char *buf,
1336 size_t size)
1337{
1338 int state;
1339 int pmp;
1340 struct ahci_port_priv *pp = ap->private_data;
1341 struct ahci_em_priv *emp;
1342
1343 state = simple_strtoul(buf, NULL, 0);
1344
1345 /* get the slot number from the message */
1346 pmp = (state & 0x0000ff00) >> 8;
1347 if (pmp < MAX_SLOTS)
1348 emp = &pp->em_priv[pmp];
1349 else
1350 return -EINVAL;
1351
1352 /* mask off the activity bits if we are in sw_activity
1353 * mode, user should turn off sw_activity before setting
1354 * activity led through em_message
1355 */
1356 if (emp->blink_policy)
1357 state &= 0xfff8ffff;
1358
1359 return ahci_transmit_led_message(ap, state, size);
1360}
1361
1362static ssize_t ahci_activity_store(struct ata_device *dev, enum sw_activity val)
1363{
1364 struct ata_link *link = dev->link;
1365 struct ata_port *ap = link->ap;
1366 struct ahci_port_priv *pp = ap->private_data;
1367 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1368 u32 port_led_state = emp->led_state;
1369
1370 /* save the desired Activity LED behavior */
1371 if (val == OFF) {
1372 /* clear LFLAG */
1373 link->flags &= ~(ATA_LFLAG_SW_ACTIVITY);
1374
1375 /* set the LED to OFF */
1376 port_led_state &= 0xfff80000;
1377 port_led_state |= (ap->port_no | (link->pmp << 8));
1378 ahci_transmit_led_message(ap, port_led_state, 4);
1379 } else {
1380 link->flags |= ATA_LFLAG_SW_ACTIVITY;
1381 if (val == BLINK_OFF) {
1382 /* set LED to ON for idle */
1383 port_led_state &= 0xfff80000;
1384 port_led_state |= (ap->port_no | (link->pmp << 8));
1385 port_led_state |= 0x00010000; /* check this */
1386 ahci_transmit_led_message(ap, port_led_state, 4);
1387 }
1388 }
1389 emp->blink_policy = val;
1390 return 0;
1391}
1392
1393static ssize_t ahci_activity_show(struct ata_device *dev, char *buf)
1394{
1395 struct ata_link *link = dev->link;
1396 struct ata_port *ap = link->ap;
1397 struct ahci_port_priv *pp = ap->private_data;
1398 struct ahci_em_priv *emp = &pp->em_priv[link->pmp];
1399
1400 /* display the saved value of activity behavior for this
1401 * disk.
1402 */
1403 return sprintf(buf, "%d\n", emp->blink_policy);
1404}
1405
1119static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap, 1406static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
1120 int port_no, void __iomem *mmio, 1407 int port_no, void __iomem *mmio,
1121 void __iomem *port_mmio) 1408 void __iomem *port_mmio)
@@ -1848,6 +2135,8 @@ static unsigned int ahci_qc_issue(struct ata_queued_cmd *qc)
1848 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE); 2135 writel(1 << qc->tag, port_mmio + PORT_CMD_ISSUE);
1849 readl(port_mmio + PORT_CMD_ISSUE); /* flush */ 2136 readl(port_mmio + PORT_CMD_ISSUE); /* flush */
1850 2137
2138 ahci_sw_activity(qc->dev->link);
2139
1851 return 0; 2140 return 0;
1852} 2141}
1853 2142
@@ -2154,7 +2443,8 @@ static void ahci_print_info(struct ata_host *host)
2154 dev_printk(KERN_INFO, &pdev->dev, 2443 dev_printk(KERN_INFO, &pdev->dev,
2155 "flags: " 2444 "flags: "
2156 "%s%s%s%s%s%s%s" 2445 "%s%s%s%s%s%s%s"
2157 "%s%s%s%s%s%s%s\n" 2446 "%s%s%s%s%s%s%s"
2447 "%s\n"
2158 , 2448 ,
2159 2449
2160 cap & (1 << 31) ? "64bit " : "", 2450 cap & (1 << 31) ? "64bit " : "",
@@ -2171,7 +2461,8 @@ static void ahci_print_info(struct ata_host *host)
2171 cap & (1 << 17) ? "pmp " : "", 2461 cap & (1 << 17) ? "pmp " : "",
2172 cap & (1 << 15) ? "pio " : "", 2462 cap & (1 << 15) ? "pio " : "",
2173 cap & (1 << 14) ? "slum " : "", 2463 cap & (1 << 14) ? "slum " : "",
2174 cap & (1 << 13) ? "part " : "" 2464 cap & (1 << 13) ? "part " : "",
2465 cap & (1 << 6) ? "ems ": ""
2175 ); 2466 );
2176} 2467}
2177 2468
@@ -2291,6 +2582,24 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
2291 if (hpriv->cap & HOST_CAP_PMP) 2582 if (hpriv->cap & HOST_CAP_PMP)
2292 pi.flags |= ATA_FLAG_PMP; 2583 pi.flags |= ATA_FLAG_PMP;
2293 2584
2585 if (ahci_em_messages && (hpriv->cap & HOST_CAP_EMS)) {
2586 u8 messages;
2587 void __iomem *mmio = pcim_iomap_table(pdev)[AHCI_PCI_BAR];
2588 u32 em_loc = readl(mmio + HOST_EM_LOC);
2589 u32 em_ctl = readl(mmio + HOST_EM_CTL);
2590
2591 messages = (em_ctl & 0x000f0000) >> 16;
2592
2593 /* we only support LED message type right now */
2594 if ((messages & 0x01) && (ahci_em_messages == 1)) {
2595 /* store em_loc */
2596 hpriv->em_loc = ((em_loc >> 16) * 4);
2597 pi.flags |= ATA_FLAG_EM;
2598 if (!(em_ctl & EM_CTL_ALHD))
2599 pi.flags |= ATA_FLAG_SW_ACTIVITY;
2600 }
2601 }
2602
2294 /* CAP.NP sometimes indicate the index of the last enabled 2603 /* CAP.NP sometimes indicate the index of the last enabled
2295 * port, at other times, that of the last possible port, so 2604 * port, at other times, that of the last possible port, so
2296 * determining the maximum port number requires looking at 2605 * determining the maximum port number requires looking at
@@ -2304,6 +2613,9 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
2304 host->iomap = pcim_iomap_table(pdev); 2613 host->iomap = pcim_iomap_table(pdev);
2305 host->private_data = hpriv; 2614 host->private_data = hpriv;
2306 2615
2616 if (pi.flags & ATA_FLAG_EM)
2617 ahci_reset_em(host);
2618
2307 for (i = 0; i < host->n_ports; i++) { 2619 for (i = 0; i < host->n_ports; i++) {
2308 struct ata_port *ap = host->ports[i]; 2620 struct ata_port *ap = host->ports[i];
2309 2621
@@ -2314,6 +2626,11 @@ static int ahci_init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
2314 /* set initial link pm policy */ 2626 /* set initial link pm policy */
2315 ap->pm_policy = NOT_AVAILABLE; 2627 ap->pm_policy = NOT_AVAILABLE;
2316 2628
2629 /* set enclosure management message type */
2630 if (ap->flags & ATA_FLAG_EM)
2631 ap->em_message_type = ahci_em_messages;
2632
2633
2317 /* disabled/not-implemented port */ 2634 /* disabled/not-implemented port */
2318 if (!(hpriv->port_map & (1 << i))) 2635 if (!(hpriv->port_map & (1 << i)))
2319 ap->ops = &ata_dummy_port_ops; 2636 ap->ops = &ata_dummy_port_ops;
diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c
index 57a43649a461..b578b11caa7b 100644
--- a/drivers/ata/libata-scsi.c
+++ b/drivers/ata/libata-scsi.c
@@ -190,6 +190,85 @@ static void ata_scsi_set_sense(struct scsi_cmnd *cmd, u8 sk, u8 asc, u8 ascq)
190 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq); 190 scsi_build_sense_buffer(0, cmd->sense_buffer, sk, asc, ascq);
191} 191}
192 192
193static ssize_t
194ata_scsi_em_message_store(struct device *dev, struct device_attribute *attr,
195 const char *buf, size_t count)
196{
197 struct Scsi_Host *shost = class_to_shost(dev);
198 struct ata_port *ap = ata_shost_to_port(shost);
199 if (ap->ops->em_store && (ap->flags & ATA_FLAG_EM))
200 return ap->ops->em_store(ap, buf, count);
201 return -EINVAL;
202}
203
204static ssize_t
205ata_scsi_em_message_show(struct device *dev, struct device_attribute *attr,
206 char *buf)
207{
208 struct Scsi_Host *shost = class_to_shost(dev);
209 struct ata_port *ap = ata_shost_to_port(shost);
210
211 if (ap->ops->em_show && (ap->flags & ATA_FLAG_EM))
212 return ap->ops->em_show(ap, buf);
213 return -EINVAL;
214}
215DEVICE_ATTR(em_message, S_IRUGO | S_IWUGO,
216 ata_scsi_em_message_show, ata_scsi_em_message_store);
217EXPORT_SYMBOL_GPL(dev_attr_em_message);
218
219static ssize_t
220ata_scsi_em_message_type_show(struct device *dev, struct device_attribute *attr,
221 char *buf)
222{
223 struct Scsi_Host *shost = class_to_shost(dev);
224 struct ata_port *ap = ata_shost_to_port(shost);
225
226 return snprintf(buf, 23, "%d\n", ap->em_message_type);
227}
228DEVICE_ATTR(em_message_type, S_IRUGO,
229 ata_scsi_em_message_type_show, NULL);
230EXPORT_SYMBOL_GPL(dev_attr_em_message_type);
231
232static ssize_t
233ata_scsi_activity_show(struct device *dev, struct device_attribute *attr,
234 char *buf)
235{
236 struct scsi_device *sdev = to_scsi_device(dev);
237 struct ata_port *ap = ata_shost_to_port(sdev->host);
238 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
239
240 if (ap->ops->sw_activity_show && (ap->flags & ATA_FLAG_SW_ACTIVITY))
241 return ap->ops->sw_activity_show(atadev, buf);
242 return -EINVAL;
243}
244
245static ssize_t
246ata_scsi_activity_store(struct device *dev, struct device_attribute *attr,
247 const char *buf, size_t count)
248{
249 struct scsi_device *sdev = to_scsi_device(dev);
250 struct ata_port *ap = ata_shost_to_port(sdev->host);
251 struct ata_device *atadev = ata_scsi_find_dev(ap, sdev);
252 enum sw_activity val;
253 int rc;
254
255 if (ap->ops->sw_activity_store && (ap->flags & ATA_FLAG_SW_ACTIVITY)) {
256 val = simple_strtoul(buf, NULL, 0);
257 switch (val) {
258 case OFF: case BLINK_ON: case BLINK_OFF:
259 rc = ap->ops->sw_activity_store(atadev, val);
260 if (!rc)
261 return count;
262 else
263 return rc;
264 }
265 }
266 return -EINVAL;
267}
268DEVICE_ATTR(sw_activity, S_IWUGO | S_IRUGO, ata_scsi_activity_show,
269 ata_scsi_activity_store);
270EXPORT_SYMBOL_GPL(dev_attr_sw_activity);
271
193static void ata_scsi_invalid_field(struct scsi_cmnd *cmd, 272static void ata_scsi_invalid_field(struct scsi_cmnd *cmd,
194 void (*done)(struct scsi_cmnd *)) 273 void (*done)(struct scsi_cmnd *))
195{ 274{
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 035f8e1cd0ac..5b247b8a6b3b 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -169,6 +169,7 @@ enum {
169 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB, 169 ATA_LFLAG_ASSUME_CLASS = ATA_LFLAG_ASSUME_ATA | ATA_LFLAG_ASSUME_SEMB,
170 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */ 170 ATA_LFLAG_NO_RETRY = (1 << 5), /* don't retry this link */
171 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */ 171 ATA_LFLAG_DISABLED = (1 << 6), /* link is disabled */
172 ATA_LFLAG_SW_ACTIVITY = (1 << 7), /* keep activity stats */
172 173
173 /* struct ata_port flags */ 174 /* struct ata_port flags */
174 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */ 175 ATA_FLAG_SLAVE_POSS = (1 << 0), /* host supports slave dev */
@@ -191,6 +192,10 @@ enum {
191 ATA_FLAG_AN = (1 << 18), /* controller supports AN */ 192 ATA_FLAG_AN = (1 << 18), /* controller supports AN */
192 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */ 193 ATA_FLAG_PMP = (1 << 19), /* controller supports PMP */
193 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */ 194 ATA_FLAG_IPM = (1 << 20), /* driver can handle IPM */
195 ATA_FLAG_EM = (1 << 21), /* driver supports enclosure
196 * management */
197 ATA_FLAG_SW_ACTIVITY = (1 << 22), /* driver supports sw activity
198 * led */
194 199
195 /* The following flag belongs to ap->pflags but is kept in 200 /* The following flag belongs to ap->pflags but is kept in
196 * ap->flags because it's referenced in many LLDs and will be 201 * ap->flags because it's referenced in many LLDs and will be
@@ -446,6 +451,15 @@ enum link_pm {
446 MEDIUM_POWER, 451 MEDIUM_POWER,
447}; 452};
448extern struct device_attribute dev_attr_link_power_management_policy; 453extern struct device_attribute dev_attr_link_power_management_policy;
454extern struct device_attribute dev_attr_em_message_type;
455extern struct device_attribute dev_attr_em_message;
456extern struct device_attribute dev_attr_sw_activity;
457
458enum sw_activity {
459 OFF,
460 BLINK_ON,
461 BLINK_OFF,
462};
449 463
450#ifdef CONFIG_ATA_SFF 464#ifdef CONFIG_ATA_SFF
451struct ata_ioports { 465struct ata_ioports {
@@ -701,6 +715,7 @@ struct ata_port {
701 struct timer_list fastdrain_timer; 715 struct timer_list fastdrain_timer;
702 unsigned long fastdrain_cnt; 716 unsigned long fastdrain_cnt;
703 717
718 int em_message_type;
704 void *private_data; 719 void *private_data;
705 720
706#ifdef CONFIG_ATA_ACPI 721#ifdef CONFIG_ATA_ACPI
@@ -792,6 +807,12 @@ struct ata_port_operations {
792 u8 (*bmdma_status)(struct ata_port *ap); 807 u8 (*bmdma_status)(struct ata_port *ap);
793#endif /* CONFIG_ATA_SFF */ 808#endif /* CONFIG_ATA_SFF */
794 809
810 ssize_t (*em_show)(struct ata_port *ap, char *buf);
811 ssize_t (*em_store)(struct ata_port *ap, const char *message,
812 size_t size);
813 ssize_t (*sw_activity_show)(struct ata_device *dev, char *buf);
814 ssize_t (*sw_activity_store)(struct ata_device *dev,
815 enum sw_activity val);
795 /* 816 /*
796 * Obsolete 817 * Obsolete
797 */ 818 */