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88523a61 SB |
1 | /* |
2 | * Driver for the Micron P320 SSD | |
3 | * Copyright (C) 2011 Micron Technology, Inc. | |
4 | * | |
5 | * Portions of this code were derived from works subjected to the | |
6 | * following copyright: | |
7 | * Copyright (C) 2009 Integrated Device Technology, Inc. | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | */ | |
20 | ||
21 | #include <linux/pci.h> | |
22 | #include <linux/interrupt.h> | |
23 | #include <linux/ata.h> | |
24 | #include <linux/delay.h> | |
25 | #include <linux/hdreg.h> | |
26 | #include <linux/uaccess.h> | |
27 | #include <linux/random.h> | |
28 | #include <linux/smp.h> | |
29 | #include <linux/compat.h> | |
30 | #include <linux/fs.h> | |
0e838c62 | 31 | #include <linux/module.h> |
88523a61 SB |
32 | #include <linux/genhd.h> |
33 | #include <linux/blkdev.h> | |
34 | #include <linux/bio.h> | |
35 | #include <linux/dma-mapping.h> | |
36 | #include <linux/idr.h> | |
60ec0eec | 37 | #include <linux/kthread.h> |
88523a61 | 38 | #include <../drivers/ata/ahci.h> |
45038367 | 39 | #include <linux/export.h> |
88523a61 SB |
40 | #include "mtip32xx.h" |
41 | ||
42 | #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32) | |
43 | #define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16)) | |
44 | #define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS) | |
45 | #define HW_PORT_PRIV_DMA_SZ \ | |
46 | (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ) | |
47 | ||
45038367 | 48 | #define HOST_CAP_NZDMA (1 << 19) |
88523a61 SB |
49 | #define HOST_HSORG 0xFC |
50 | #define HSORG_DISABLE_SLOTGRP_INTR (1<<24) | |
51 | #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16) | |
52 | #define HSORG_HWREV 0xFF00 | |
53 | #define HSORG_STYLE 0x8 | |
54 | #define HSORG_SLOTGROUPS 0x7 | |
55 | ||
56 | #define PORT_COMMAND_ISSUE 0x38 | |
57 | #define PORT_SDBV 0x7C | |
58 | ||
59 | #define PORT_OFFSET 0x100 | |
60 | #define PORT_MEM_SIZE 0x80 | |
61 | ||
62 | #define PORT_IRQ_ERR \ | |
63 | (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \ | |
64 | PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \ | |
65 | PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \ | |
66 | PORT_IRQ_OVERFLOW) | |
67 | #define PORT_IRQ_LEGACY \ | |
68 | (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS) | |
69 | #define PORT_IRQ_HANDLED \ | |
70 | (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \ | |
71 | PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \ | |
72 | PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY) | |
73 | #define DEF_PORT_IRQ \ | |
74 | (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS) | |
75 | ||
76 | /* product numbers */ | |
77 | #define MTIP_PRODUCT_UNKNOWN 0x00 | |
78 | #define MTIP_PRODUCT_ASICFPGA 0x11 | |
79 | ||
80 | /* Device instance number, incremented each time a device is probed. */ | |
81 | static int instance; | |
82 | ||
83 | /* | |
84 | * Global variable used to hold the major block device number | |
85 | * allocated in mtip_init(). | |
86 | */ | |
3ff147d3 | 87 | static int mtip_major; |
88523a61 SB |
88 | |
89 | static DEFINE_SPINLOCK(rssd_index_lock); | |
90 | static DEFINE_IDA(rssd_index_ida); | |
91 | ||
62ee8c13 AT |
92 | static int mtip_block_initialize(struct driver_data *dd); |
93 | ||
16d02c04 | 94 | #ifdef CONFIG_COMPAT |
88523a61 SB |
95 | struct mtip_compat_ide_task_request_s { |
96 | __u8 io_ports[8]; | |
97 | __u8 hob_ports[8]; | |
98 | ide_reg_valid_t out_flags; | |
99 | ide_reg_valid_t in_flags; | |
100 | int data_phase; | |
101 | int req_cmd; | |
102 | compat_ulong_t out_size; | |
103 | compat_ulong_t in_size; | |
104 | }; | |
16d02c04 | 105 | #endif |
88523a61 | 106 | |
6316668f JA |
107 | /* |
108 | * This function check_for_surprise_removal is called | |
109 | * while card is removed from the system and it will | |
110 | * read the vendor id from the configration space | |
111 | * | |
112 | * @pdev Pointer to the pci_dev structure. | |
113 | * | |
114 | * return value | |
115 | * true if device removed, else false | |
116 | */ | |
117 | static bool mtip_check_surprise_removal(struct pci_dev *pdev) | |
118 | { | |
119 | u16 vendor_id = 0; | |
120 | ||
121 | /* Read the vendorID from the configuration space */ | |
122 | pci_read_config_word(pdev, 0x00, &vendor_id); | |
123 | if (vendor_id == 0xFFFF) | |
124 | return true; /* device removed */ | |
125 | ||
126 | return false; /* device present */ | |
127 | } | |
128 | ||
129 | /* | |
130 | * This function is called for clean the pending command in the | |
131 | * command slot during the surprise removal of device and return | |
132 | * error to the upper layer. | |
133 | * | |
134 | * @dd Pointer to the DRIVER_DATA structure. | |
135 | * | |
136 | * return value | |
137 | * None | |
138 | */ | |
139 | static void mtip_command_cleanup(struct driver_data *dd) | |
140 | { | |
141 | int group = 0, commandslot = 0, commandindex = 0; | |
142 | struct mtip_cmd *command; | |
143 | struct mtip_port *port = dd->port; | |
45038367 AT |
144 | static int in_progress; |
145 | ||
146 | if (in_progress) | |
147 | return; | |
148 | ||
149 | in_progress = 1; | |
6316668f JA |
150 | |
151 | for (group = 0; group < 4; group++) { | |
152 | for (commandslot = 0; commandslot < 32; commandslot++) { | |
153 | if (!(port->allocated[group] & (1 << commandslot))) | |
154 | continue; | |
155 | ||
156 | commandindex = group << 5 | commandslot; | |
157 | command = &port->commands[commandindex]; | |
158 | ||
159 | if (atomic_read(&command->active) | |
160 | && (command->async_callback)) { | |
161 | command->async_callback(command->async_data, | |
162 | -ENODEV); | |
163 | command->async_callback = NULL; | |
164 | command->async_data = NULL; | |
165 | } | |
166 | ||
167 | dma_unmap_sg(&port->dd->pdev->dev, | |
168 | command->sg, | |
169 | command->scatter_ents, | |
170 | command->direction); | |
171 | } | |
172 | } | |
173 | ||
174 | up(&port->cmd_slot); | |
175 | ||
8a857a88 | 176 | set_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag); |
45038367 | 177 | in_progress = 0; |
6316668f JA |
178 | } |
179 | ||
88523a61 SB |
180 | /* |
181 | * Obtain an empty command slot. | |
182 | * | |
183 | * This function needs to be reentrant since it could be called | |
184 | * at the same time on multiple CPUs. The allocation of the | |
185 | * command slot must be atomic. | |
186 | * | |
187 | * @port Pointer to the port data structure. | |
188 | * | |
189 | * return value | |
190 | * >= 0 Index of command slot obtained. | |
191 | * -1 No command slots available. | |
192 | */ | |
193 | static int get_slot(struct mtip_port *port) | |
194 | { | |
195 | int slot, i; | |
196 | unsigned int num_command_slots = port->dd->slot_groups * 32; | |
197 | ||
198 | /* | |
199 | * Try 10 times, because there is a small race here. | |
200 | * that's ok, because it's still cheaper than a lock. | |
201 | * | |
202 | * Race: Since this section is not protected by lock, same bit | |
203 | * could be chosen by different process contexts running in | |
204 | * different processor. So instead of costly lock, we are going | |
205 | * with loop. | |
206 | */ | |
207 | for (i = 0; i < 10; i++) { | |
208 | slot = find_next_zero_bit(port->allocated, | |
209 | num_command_slots, 1); | |
210 | if ((slot < num_command_slots) && | |
211 | (!test_and_set_bit(slot, port->allocated))) | |
212 | return slot; | |
213 | } | |
214 | dev_warn(&port->dd->pdev->dev, "Failed to get a tag.\n"); | |
215 | ||
216 | if (mtip_check_surprise_removal(port->dd->pdev)) { | |
217 | /* Device not present, clean outstanding commands */ | |
218 | mtip_command_cleanup(port->dd); | |
219 | } | |
220 | return -1; | |
221 | } | |
222 | ||
223 | /* | |
224 | * Release a command slot. | |
225 | * | |
226 | * @port Pointer to the port data structure. | |
227 | * @tag Tag of command to release | |
228 | * | |
229 | * return value | |
230 | * None | |
231 | */ | |
232 | static inline void release_slot(struct mtip_port *port, int tag) | |
233 | { | |
234 | smp_mb__before_clear_bit(); | |
235 | clear_bit(tag, port->allocated); | |
236 | smp_mb__after_clear_bit(); | |
237 | } | |
238 | ||
239 | /* | |
6316668f | 240 | * Reset the HBA (without sleeping) |
88523a61 | 241 | * |
6316668f JA |
242 | * Just like hba_reset, except does not call sleep, so can be |
243 | * run from interrupt/tasklet context. | |
88523a61 | 244 | * |
6316668f | 245 | * @dd Pointer to the driver data structure. |
88523a61 SB |
246 | * |
247 | * return value | |
6316668f JA |
248 | * 0 The reset was successful. |
249 | * -1 The HBA Reset bit did not clear. | |
88523a61 | 250 | */ |
6316668f | 251 | static int hba_reset_nosleep(struct driver_data *dd) |
88523a61 | 252 | { |
6316668f | 253 | unsigned long timeout; |
88523a61 | 254 | |
6316668f JA |
255 | /* Chip quirk: quiesce any chip function */ |
256 | mdelay(10); | |
88523a61 | 257 | |
6316668f JA |
258 | /* Set the reset bit */ |
259 | writel(HOST_RESET, dd->mmio + HOST_CTL); | |
88523a61 | 260 | |
6316668f JA |
261 | /* Flush */ |
262 | readl(dd->mmio + HOST_CTL); | |
88523a61 | 263 | |
6316668f JA |
264 | /* |
265 | * Wait 10ms then spin for up to 1 second | |
266 | * waiting for reset acknowledgement | |
267 | */ | |
268 | timeout = jiffies + msecs_to_jiffies(1000); | |
269 | mdelay(10); | |
270 | while ((readl(dd->mmio + HOST_CTL) & HOST_RESET) | |
271 | && time_before(jiffies, timeout)) | |
272 | mdelay(1); | |
88523a61 | 273 | |
8a857a88 | 274 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) |
45038367 AT |
275 | return -1; |
276 | ||
6316668f JA |
277 | if (readl(dd->mmio + HOST_CTL) & HOST_RESET) |
278 | return -1; | |
88523a61 | 279 | |
6316668f | 280 | return 0; |
88523a61 SB |
281 | } |
282 | ||
283 | /* | |
6316668f | 284 | * Issue a command to the hardware. |
88523a61 | 285 | * |
6316668f JA |
286 | * Set the appropriate bit in the s_active and Command Issue hardware |
287 | * registers, causing hardware command processing to begin. | |
88523a61 | 288 | * |
6316668f JA |
289 | * @port Pointer to the port structure. |
290 | * @tag The tag of the command to be issued. | |
88523a61 SB |
291 | * |
292 | * return value | |
6316668f | 293 | * None |
88523a61 | 294 | */ |
6316668f | 295 | static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag) |
88523a61 | 296 | { |
6316668f | 297 | unsigned long flags = 0; |
88523a61 | 298 | |
6316668f | 299 | atomic_set(&port->commands[tag].active, 1); |
88523a61 | 300 | |
6316668f | 301 | spin_lock_irqsave(&port->cmd_issue_lock, flags); |
88523a61 | 302 | |
6316668f JA |
303 | writel((1 << MTIP_TAG_BIT(tag)), |
304 | port->s_active[MTIP_TAG_INDEX(tag)]); | |
305 | writel((1 << MTIP_TAG_BIT(tag)), | |
306 | port->cmd_issue[MTIP_TAG_INDEX(tag)]); | |
88523a61 | 307 | |
6316668f | 308 | spin_unlock_irqrestore(&port->cmd_issue_lock, flags); |
dad40f16 AT |
309 | |
310 | /* Set the command's timeout value.*/ | |
311 | port->commands[tag].comp_time = jiffies + msecs_to_jiffies( | |
312 | MTIP_NCQ_COMMAND_TIMEOUT_MS); | |
88523a61 SB |
313 | } |
314 | ||
315 | /* | |
316 | * Enable/disable the reception of FIS | |
317 | * | |
318 | * @port Pointer to the port data structure | |
319 | * @enable 1 to enable, 0 to disable | |
320 | * | |
321 | * return value | |
322 | * Previous state: 1 enabled, 0 disabled | |
323 | */ | |
324 | static int mtip_enable_fis(struct mtip_port *port, int enable) | |
325 | { | |
326 | u32 tmp; | |
327 | ||
328 | /* enable FIS reception */ | |
329 | tmp = readl(port->mmio + PORT_CMD); | |
330 | if (enable) | |
331 | writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD); | |
332 | else | |
333 | writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD); | |
334 | ||
335 | /* Flush */ | |
336 | readl(port->mmio + PORT_CMD); | |
337 | ||
338 | return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX)); | |
339 | } | |
340 | ||
341 | /* | |
342 | * Enable/disable the DMA engine | |
343 | * | |
344 | * @port Pointer to the port data structure | |
345 | * @enable 1 to enable, 0 to disable | |
346 | * | |
347 | * return value | |
348 | * Previous state: 1 enabled, 0 disabled. | |
349 | */ | |
350 | static int mtip_enable_engine(struct mtip_port *port, int enable) | |
351 | { | |
352 | u32 tmp; | |
353 | ||
354 | /* enable FIS reception */ | |
355 | tmp = readl(port->mmio + PORT_CMD); | |
356 | if (enable) | |
357 | writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD); | |
358 | else | |
359 | writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD); | |
360 | ||
361 | readl(port->mmio + PORT_CMD); | |
362 | return (((tmp & PORT_CMD_START) == PORT_CMD_START)); | |
363 | } | |
364 | ||
365 | /* | |
366 | * Enables the port DMA engine and FIS reception. | |
367 | * | |
368 | * return value | |
369 | * None | |
370 | */ | |
371 | static inline void mtip_start_port(struct mtip_port *port) | |
372 | { | |
373 | /* Enable FIS reception */ | |
374 | mtip_enable_fis(port, 1); | |
375 | ||
376 | /* Enable the DMA engine */ | |
377 | mtip_enable_engine(port, 1); | |
378 | } | |
379 | ||
380 | /* | |
381 | * Deinitialize a port by disabling port interrupts, the DMA engine, | |
382 | * and FIS reception. | |
383 | * | |
384 | * @port Pointer to the port structure | |
385 | * | |
386 | * return value | |
387 | * None | |
388 | */ | |
389 | static inline void mtip_deinit_port(struct mtip_port *port) | |
390 | { | |
391 | /* Disable interrupts on this port */ | |
392 | writel(0, port->mmio + PORT_IRQ_MASK); | |
393 | ||
394 | /* Disable the DMA engine */ | |
395 | mtip_enable_engine(port, 0); | |
396 | ||
397 | /* Disable FIS reception */ | |
398 | mtip_enable_fis(port, 0); | |
399 | } | |
400 | ||
401 | /* | |
402 | * Initialize a port. | |
403 | * | |
404 | * This function deinitializes the port by calling mtip_deinit_port() and | |
405 | * then initializes it by setting the command header and RX FIS addresses, | |
406 | * clearing the SError register and any pending port interrupts before | |
407 | * re-enabling the default set of port interrupts. | |
408 | * | |
409 | * @port Pointer to the port structure. | |
410 | * | |
411 | * return value | |
412 | * None | |
413 | */ | |
414 | static void mtip_init_port(struct mtip_port *port) | |
415 | { | |
416 | int i; | |
417 | mtip_deinit_port(port); | |
418 | ||
419 | /* Program the command list base and FIS base addresses */ | |
420 | if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) { | |
421 | writel((port->command_list_dma >> 16) >> 16, | |
422 | port->mmio + PORT_LST_ADDR_HI); | |
423 | writel((port->rxfis_dma >> 16) >> 16, | |
424 | port->mmio + PORT_FIS_ADDR_HI); | |
425 | } | |
426 | ||
60ec0eec | 427 | writel(port->command_list_dma & 0xFFFFFFFF, |
88523a61 | 428 | port->mmio + PORT_LST_ADDR); |
60ec0eec | 429 | writel(port->rxfis_dma & 0xFFFFFFFF, port->mmio + PORT_FIS_ADDR); |
88523a61 SB |
430 | |
431 | /* Clear SError */ | |
432 | writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR); | |
433 | ||
6316668f JA |
434 | /* reset the completed registers.*/ |
435 | for (i = 0; i < port->dd->slot_groups; i++) | |
436 | writel(0xFFFFFFFF, port->completed[i]); | |
88523a61 | 437 | |
6316668f | 438 | /* Clear any pending interrupts for this port */ |
c74b0f58 AT |
439 | writel(readl(port->dd->mmio + PORT_IRQ_STAT), |
440 | port->dd->mmio + PORT_IRQ_STAT); | |
88523a61 | 441 | |
22be2e6e AT |
442 | /* Clear any pending interrupts on the HBA. */ |
443 | writel(readl(port->dd->mmio + HOST_IRQ_STAT), | |
444 | port->dd->mmio + HOST_IRQ_STAT); | |
445 | ||
6316668f JA |
446 | /* Enable port interrupts */ |
447 | writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK); | |
88523a61 SB |
448 | } |
449 | ||
450 | /* | |
451 | * Restart a port | |
452 | * | |
453 | * @port Pointer to the port data structure. | |
454 | * | |
455 | * return value | |
456 | * None | |
457 | */ | |
6316668f | 458 | static void mtip_restart_port(struct mtip_port *port) |
88523a61 SB |
459 | { |
460 | unsigned long timeout; | |
461 | ||
462 | /* Disable the DMA engine */ | |
463 | mtip_enable_engine(port, 0); | |
464 | ||
465 | /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */ | |
466 | timeout = jiffies + msecs_to_jiffies(500); | |
467 | while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) | |
468 | && time_before(jiffies, timeout)) | |
469 | ; | |
470 | ||
8a857a88 | 471 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
45038367 AT |
472 | return; |
473 | ||
88523a61 SB |
474 | /* |
475 | * Chip quirk: escalate to hba reset if | |
476 | * PxCMD.CR not clear after 500 ms | |
477 | */ | |
478 | if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) { | |
479 | dev_warn(&port->dd->pdev->dev, | |
480 | "PxCMD.CR not clear, escalating reset\n"); | |
481 | ||
482 | if (hba_reset_nosleep(port->dd)) | |
483 | dev_err(&port->dd->pdev->dev, | |
484 | "HBA reset escalation failed.\n"); | |
485 | ||
486 | /* 30 ms delay before com reset to quiesce chip */ | |
487 | mdelay(30); | |
488 | } | |
489 | ||
490 | dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n"); | |
491 | ||
492 | /* Set PxSCTL.DET */ | |
493 | writel(readl(port->mmio + PORT_SCR_CTL) | | |
494 | 1, port->mmio + PORT_SCR_CTL); | |
495 | readl(port->mmio + PORT_SCR_CTL); | |
496 | ||
497 | /* Wait 1 ms to quiesce chip function */ | |
498 | timeout = jiffies + msecs_to_jiffies(1); | |
499 | while (time_before(jiffies, timeout)) | |
500 | ; | |
501 | ||
8a857a88 | 502 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
45038367 AT |
503 | return; |
504 | ||
88523a61 SB |
505 | /* Clear PxSCTL.DET */ |
506 | writel(readl(port->mmio + PORT_SCR_CTL) & ~1, | |
507 | port->mmio + PORT_SCR_CTL); | |
508 | readl(port->mmio + PORT_SCR_CTL); | |
509 | ||
510 | /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */ | |
511 | timeout = jiffies + msecs_to_jiffies(500); | |
512 | while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) | |
513 | && time_before(jiffies, timeout)) | |
514 | ; | |
515 | ||
8a857a88 | 516 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
45038367 AT |
517 | return; |
518 | ||
88523a61 SB |
519 | if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) |
520 | dev_warn(&port->dd->pdev->dev, | |
521 | "COM reset failed\n"); | |
522 | ||
22be2e6e AT |
523 | mtip_init_port(port); |
524 | mtip_start_port(port); | |
88523a61 | 525 | |
88523a61 SB |
526 | } |
527 | ||
95fea2f1 AT |
528 | /* |
529 | * Helper function for tag logging | |
530 | */ | |
531 | static void print_tags(struct driver_data *dd, | |
532 | char *msg, | |
533 | unsigned long *tagbits, | |
534 | int cnt) | |
535 | { | |
536 | unsigned char tagmap[128]; | |
537 | int group, tagmap_len = 0; | |
538 | ||
539 | memset(tagmap, 0, sizeof(tagmap)); | |
540 | for (group = SLOTBITS_IN_LONGS; group > 0; group--) | |
541 | tagmap_len = sprintf(tagmap + tagmap_len, "%016lX ", | |
542 | tagbits[group-1]); | |
543 | dev_warn(&dd->pdev->dev, | |
544 | "%d command(s) %s: tagmap [%s]", cnt, msg, tagmap); | |
545 | } | |
546 | ||
6316668f JA |
547 | /* |
548 | * Called periodically to see if any read/write commands are | |
549 | * taking too long to complete. | |
550 | * | |
551 | * @data Pointer to the PORT data structure. | |
552 | * | |
553 | * return value | |
554 | * None | |
555 | */ | |
556 | static void mtip_timeout_function(unsigned long int data) | |
557 | { | |
558 | struct mtip_port *port = (struct mtip_port *) data; | |
559 | struct host_to_dev_fis *fis; | |
560 | struct mtip_cmd *command; | |
561 | int tag, cmdto_cnt = 0; | |
562 | unsigned int bit, group; | |
563 | unsigned int num_command_slots = port->dd->slot_groups * 32; | |
95fea2f1 | 564 | unsigned long to, tagaccum[SLOTBITS_IN_LONGS]; |
6316668f JA |
565 | |
566 | if (unlikely(!port)) | |
567 | return; | |
568 | ||
8a857a88 | 569 | if (test_bit(MTIP_DDF_RESUME_BIT, &port->dd->dd_flag)) { |
6316668f JA |
570 | mod_timer(&port->cmd_timer, |
571 | jiffies + msecs_to_jiffies(30000)); | |
572 | return; | |
573 | } | |
95fea2f1 AT |
574 | /* clear the tag accumulator */ |
575 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); | |
6316668f JA |
576 | |
577 | for (tag = 0; tag < num_command_slots; tag++) { | |
578 | /* | |
579 | * Skip internal command slot as it has | |
580 | * its own timeout mechanism | |
581 | */ | |
582 | if (tag == MTIP_TAG_INTERNAL) | |
583 | continue; | |
584 | ||
585 | if (atomic_read(&port->commands[tag].active) && | |
586 | (time_after(jiffies, port->commands[tag].comp_time))) { | |
587 | group = tag >> 5; | |
60ec0eec | 588 | bit = tag & 0x1F; |
6316668f JA |
589 | |
590 | command = &port->commands[tag]; | |
591 | fis = (struct host_to_dev_fis *) command->command; | |
592 | ||
95fea2f1 | 593 | set_bit(tag, tagaccum); |
6316668f JA |
594 | cmdto_cnt++; |
595 | if (cmdto_cnt == 1) | |
8a857a88 | 596 | set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
6316668f JA |
597 | |
598 | /* | |
599 | * Clear the completed bit. This should prevent | |
600 | * any interrupt handlers from trying to retire | |
601 | * the command. | |
602 | */ | |
603 | writel(1 << bit, port->completed[group]); | |
604 | ||
605 | /* Call the async completion callback. */ | |
606 | if (likely(command->async_callback)) | |
607 | command->async_callback(command->async_data, | |
608 | -EIO); | |
609 | command->async_callback = NULL; | |
610 | command->comp_func = NULL; | |
611 | ||
612 | /* Unmap the DMA scatter list entries */ | |
613 | dma_unmap_sg(&port->dd->pdev->dev, | |
614 | command->sg, | |
615 | command->scatter_ents, | |
616 | command->direction); | |
617 | ||
618 | /* | |
619 | * Clear the allocated bit and active tag for the | |
620 | * command. | |
621 | */ | |
622 | atomic_set(&port->commands[tag].active, 0); | |
623 | release_slot(port, tag); | |
624 | ||
625 | up(&port->cmd_slot); | |
626 | } | |
627 | } | |
628 | ||
c74b0f58 | 629 | if (cmdto_cnt && !test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) { |
95fea2f1 AT |
630 | print_tags(port->dd, "timed out", tagaccum, cmdto_cnt); |
631 | ||
6316668f | 632 | mtip_restart_port(port); |
8a857a88 | 633 | clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
60ec0eec | 634 | wake_up_interruptible(&port->svc_wait); |
6316668f JA |
635 | } |
636 | ||
c74b0f58 AT |
637 | if (port->ic_pause_timer) { |
638 | to = port->ic_pause_timer + msecs_to_jiffies(1000); | |
639 | if (time_after(jiffies, to)) { | |
640 | if (!test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags)) { | |
641 | port->ic_pause_timer = 0; | |
642 | clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); | |
643 | clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); | |
644 | clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); | |
645 | wake_up_interruptible(&port->svc_wait); | |
646 | } | |
647 | ||
648 | ||
649 | } | |
650 | } | |
651 | ||
6316668f JA |
652 | /* Restart the timer */ |
653 | mod_timer(&port->cmd_timer, | |
654 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); | |
655 | } | |
656 | ||
657 | /* | |
658 | * IO completion function. | |
659 | * | |
660 | * This completion function is called by the driver ISR when a | |
661 | * command that was issued by the kernel completes. It first calls the | |
662 | * asynchronous completion function which normally calls back into the block | |
663 | * layer passing the asynchronous callback data, then unmaps the | |
664 | * scatter list associated with the completed command, and finally | |
665 | * clears the allocated bit associated with the completed command. | |
666 | * | |
667 | * @port Pointer to the port data structure. | |
668 | * @tag Tag of the command. | |
669 | * @data Pointer to driver_data. | |
670 | * @status Completion status. | |
671 | * | |
672 | * return value | |
673 | * None | |
674 | */ | |
675 | static void mtip_async_complete(struct mtip_port *port, | |
676 | int tag, | |
677 | void *data, | |
678 | int status) | |
679 | { | |
680 | struct mtip_cmd *command; | |
681 | struct driver_data *dd = data; | |
682 | int cb_status = status ? -EIO : 0; | |
683 | ||
684 | if (unlikely(!dd) || unlikely(!port)) | |
685 | return; | |
686 | ||
687 | command = &port->commands[tag]; | |
688 | ||
689 | if (unlikely(status == PORT_IRQ_TF_ERR)) { | |
690 | dev_warn(&port->dd->pdev->dev, | |
691 | "Command tag %d failed due to TFE\n", tag); | |
692 | } | |
693 | ||
694 | /* Upper layer callback */ | |
695 | if (likely(command->async_callback)) | |
696 | command->async_callback(command->async_data, cb_status); | |
697 | ||
698 | command->async_callback = NULL; | |
699 | command->comp_func = NULL; | |
700 | ||
701 | /* Unmap the DMA scatter list entries */ | |
702 | dma_unmap_sg(&dd->pdev->dev, | |
703 | command->sg, | |
704 | command->scatter_ents, | |
705 | command->direction); | |
706 | ||
707 | /* Clear the allocated and active bits for the command */ | |
708 | atomic_set(&port->commands[tag].active, 0); | |
709 | release_slot(port, tag); | |
710 | ||
711 | up(&port->cmd_slot); | |
712 | } | |
713 | ||
714 | /* | |
715 | * Internal command completion callback function. | |
716 | * | |
717 | * This function is normally called by the driver ISR when an internal | |
718 | * command completed. This function signals the command completion by | |
719 | * calling complete(). | |
720 | * | |
721 | * @port Pointer to the port data structure. | |
722 | * @tag Tag of the command that has completed. | |
723 | * @data Pointer to a completion structure. | |
724 | * @status Completion status. | |
725 | * | |
726 | * return value | |
727 | * None | |
728 | */ | |
729 | static void mtip_completion(struct mtip_port *port, | |
730 | int tag, | |
731 | void *data, | |
732 | int status) | |
733 | { | |
734 | struct mtip_cmd *command = &port->commands[tag]; | |
735 | struct completion *waiting = data; | |
736 | if (unlikely(status == PORT_IRQ_TF_ERR)) | |
737 | dev_warn(&port->dd->pdev->dev, | |
738 | "Internal command %d completed with TFE\n", tag); | |
739 | ||
740 | command->async_callback = NULL; | |
741 | command->comp_func = NULL; | |
742 | ||
743 | complete(waiting); | |
744 | } | |
745 | ||
8182b495 AT |
746 | static void mtip_null_completion(struct mtip_port *port, |
747 | int tag, | |
748 | void *data, | |
749 | int status) | |
750 | { | |
751 | return; | |
752 | } | |
753 | ||
f6587217 AT |
754 | static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer, |
755 | dma_addr_t buffer_dma, unsigned int sectors); | |
756 | static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id, | |
757 | struct smart_attr *attrib); | |
88523a61 SB |
758 | /* |
759 | * Handle an error. | |
760 | * | |
761 | * @dd Pointer to the DRIVER_DATA structure. | |
762 | * | |
763 | * return value | |
764 | * None | |
765 | */ | |
766 | static void mtip_handle_tfe(struct driver_data *dd) | |
767 | { | |
f6587217 | 768 | int group, tag, bit, reissue, rv; |
88523a61 | 769 | struct mtip_port *port; |
f6587217 | 770 | struct mtip_cmd *cmd; |
88523a61 SB |
771 | u32 completed; |
772 | struct host_to_dev_fis *fis; | |
773 | unsigned long tagaccum[SLOTBITS_IN_LONGS]; | |
95fea2f1 | 774 | unsigned int cmd_cnt = 0; |
f6587217 AT |
775 | unsigned char *buf; |
776 | char *fail_reason = NULL; | |
777 | int fail_all_ncq_write = 0, fail_all_ncq_cmds = 0; | |
88523a61 SB |
778 | |
779 | dev_warn(&dd->pdev->dev, "Taskfile error\n"); | |
780 | ||
781 | port = dd->port; | |
782 | ||
783 | /* Stop the timer to prevent command timeouts. */ | |
784 | del_timer(&port->cmd_timer); | |
785 | ||
95fea2f1 AT |
786 | /* clear the tag accumulator */ |
787 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); | |
788 | ||
88523a61 | 789 | /* Set eh_active */ |
8a857a88 | 790 | set_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
88523a61 SB |
791 | |
792 | /* Loop through all the groups */ | |
793 | for (group = 0; group < dd->slot_groups; group++) { | |
794 | completed = readl(port->completed[group]); | |
795 | ||
796 | /* clear completed status register in the hardware.*/ | |
797 | writel(completed, port->completed[group]); | |
798 | ||
88523a61 SB |
799 | /* Process successfully completed commands */ |
800 | for (bit = 0; bit < 32 && completed; bit++) { | |
801 | if (!(completed & (1<<bit))) | |
802 | continue; | |
803 | tag = (group << 5) + bit; | |
804 | ||
805 | /* Skip the internal command slot */ | |
806 | if (tag == MTIP_TAG_INTERNAL) | |
807 | continue; | |
808 | ||
f6587217 AT |
809 | cmd = &port->commands[tag]; |
810 | if (likely(cmd->comp_func)) { | |
88523a61 | 811 | set_bit(tag, tagaccum); |
95fea2f1 | 812 | cmd_cnt++; |
f6587217 AT |
813 | atomic_set(&cmd->active, 0); |
814 | cmd->comp_func(port, | |
88523a61 | 815 | tag, |
f6587217 | 816 | cmd->comp_data, |
88523a61 SB |
817 | 0); |
818 | } else { | |
819 | dev_err(&port->dd->pdev->dev, | |
820 | "Missing completion func for tag %d", | |
821 | tag); | |
822 | if (mtip_check_surprise_removal(dd->pdev)) { | |
823 | mtip_command_cleanup(dd); | |
824 | /* don't proceed further */ | |
825 | return; | |
826 | } | |
827 | } | |
828 | } | |
829 | } | |
95fea2f1 AT |
830 | |
831 | print_tags(dd, "completed (TFE)", tagaccum, cmd_cnt); | |
88523a61 SB |
832 | |
833 | /* Restart the port */ | |
834 | mdelay(20); | |
835 | mtip_restart_port(port); | |
836 | ||
f6587217 AT |
837 | /* Trying to determine the cause of the error */ |
838 | rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, | |
839 | dd->port->log_buf, | |
840 | dd->port->log_buf_dma, 1); | |
841 | if (rv) { | |
842 | dev_warn(&dd->pdev->dev, | |
843 | "Error in READ LOG EXT (10h) command\n"); | |
844 | /* non-critical error, don't fail the load */ | |
845 | } else { | |
846 | buf = (unsigned char *)dd->port->log_buf; | |
847 | if (buf[259] & 0x1) { | |
848 | dev_info(&dd->pdev->dev, | |
849 | "Write protect bit is set.\n"); | |
8a857a88 | 850 | set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); |
f6587217 AT |
851 | fail_all_ncq_write = 1; |
852 | fail_reason = "write protect"; | |
853 | } | |
854 | if (buf[288] == 0xF7) { | |
855 | dev_info(&dd->pdev->dev, | |
856 | "Exceeded Tmax, drive in thermal shutdown.\n"); | |
8a857a88 | 857 | set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); |
f6587217 AT |
858 | fail_all_ncq_cmds = 1; |
859 | fail_reason = "thermal shutdown"; | |
860 | } | |
861 | if (buf[288] == 0xBF) { | |
862 | dev_info(&dd->pdev->dev, | |
863 | "Drive indicates rebuild has failed.\n"); | |
864 | fail_all_ncq_cmds = 1; | |
865 | fail_reason = "rebuild failed"; | |
866 | } | |
867 | } | |
868 | ||
88523a61 SB |
869 | /* clear the tag accumulator */ |
870 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); | |
871 | ||
872 | /* Loop through all the groups */ | |
873 | for (group = 0; group < dd->slot_groups; group++) { | |
874 | for (bit = 0; bit < 32; bit++) { | |
875 | reissue = 1; | |
876 | tag = (group << 5) + bit; | |
f6587217 | 877 | cmd = &port->commands[tag]; |
88523a61 SB |
878 | |
879 | /* If the active bit is set re-issue the command */ | |
f6587217 | 880 | if (atomic_read(&cmd->active) == 0) |
88523a61 SB |
881 | continue; |
882 | ||
f6587217 | 883 | fis = (struct host_to_dev_fis *)cmd->command; |
88523a61 SB |
884 | |
885 | /* Should re-issue? */ | |
886 | if (tag == MTIP_TAG_INTERNAL || | |
887 | fis->command == ATA_CMD_SET_FEATURES) | |
888 | reissue = 0; | |
f6587217 AT |
889 | else { |
890 | if (fail_all_ncq_cmds || | |
891 | (fail_all_ncq_write && | |
892 | fis->command == ATA_CMD_FPDMA_WRITE)) { | |
893 | dev_warn(&dd->pdev->dev, | |
894 | " Fail: %s w/tag %d [%s].\n", | |
895 | fis->command == ATA_CMD_FPDMA_WRITE ? | |
896 | "write" : "read", | |
897 | tag, | |
898 | fail_reason != NULL ? | |
899 | fail_reason : "unknown"); | |
900 | atomic_set(&cmd->active, 0); | |
901 | if (cmd->comp_func) { | |
902 | cmd->comp_func(port, tag, | |
903 | cmd->comp_data, | |
904 | -ENODATA); | |
905 | } | |
906 | continue; | |
907 | } | |
908 | } | |
88523a61 SB |
909 | |
910 | /* | |
911 | * First check if this command has | |
912 | * exceeded its retries. | |
913 | */ | |
f6587217 | 914 | if (reissue && (cmd->retries-- > 0)) { |
88523a61 SB |
915 | |
916 | set_bit(tag, tagaccum); | |
917 | ||
88523a61 SB |
918 | /* Re-issue the command. */ |
919 | mtip_issue_ncq_command(port, tag); | |
920 | ||
921 | continue; | |
922 | } | |
923 | ||
924 | /* Retire a command that will not be reissued */ | |
925 | dev_warn(&port->dd->pdev->dev, | |
926 | "retiring tag %d\n", tag); | |
f6587217 | 927 | atomic_set(&cmd->active, 0); |
88523a61 | 928 | |
f6587217 AT |
929 | if (cmd->comp_func) |
930 | cmd->comp_func( | |
88523a61 SB |
931 | port, |
932 | tag, | |
f6587217 | 933 | cmd->comp_data, |
88523a61 SB |
934 | PORT_IRQ_TF_ERR); |
935 | else | |
936 | dev_warn(&port->dd->pdev->dev, | |
937 | "Bad completion for tag %d\n", | |
938 | tag); | |
939 | } | |
940 | } | |
95fea2f1 | 941 | print_tags(dd, "reissued (TFE)", tagaccum, cmd_cnt); |
88523a61 | 942 | |
60ec0eec | 943 | /* clear eh_active */ |
8a857a88 | 944 | clear_bit(MTIP_PF_EH_ACTIVE_BIT, &port->flags); |
60ec0eec | 945 | wake_up_interruptible(&port->svc_wait); |
88523a61 SB |
946 | |
947 | mod_timer(&port->cmd_timer, | |
948 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); | |
949 | } | |
950 | ||
951 | /* | |
952 | * Handle a set device bits interrupt | |
953 | */ | |
954 | static inline void mtip_process_sdbf(struct driver_data *dd) | |
955 | { | |
956 | struct mtip_port *port = dd->port; | |
957 | int group, tag, bit; | |
958 | u32 completed; | |
959 | struct mtip_cmd *command; | |
960 | ||
961 | /* walk all bits in all slot groups */ | |
962 | for (group = 0; group < dd->slot_groups; group++) { | |
963 | completed = readl(port->completed[group]); | |
964 | ||
965 | /* clear completed status register in the hardware.*/ | |
966 | writel(completed, port->completed[group]); | |
967 | ||
968 | /* Process completed commands. */ | |
969 | for (bit = 0; | |
970 | (bit < 32) && completed; | |
971 | bit++, completed >>= 1) { | |
972 | if (completed & 0x01) { | |
973 | tag = (group << 5) | bit; | |
974 | ||
975 | /* skip internal command slot. */ | |
976 | if (unlikely(tag == MTIP_TAG_INTERNAL)) | |
977 | continue; | |
978 | ||
979 | command = &port->commands[tag]; | |
88523a61 SB |
980 | /* make internal callback */ |
981 | if (likely(command->comp_func)) { | |
982 | command->comp_func( | |
983 | port, | |
984 | tag, | |
985 | command->comp_data, | |
986 | 0); | |
987 | } else { | |
988 | dev_warn(&dd->pdev->dev, | |
989 | "Null completion " | |
990 | "for tag %d", | |
991 | tag); | |
992 | ||
993 | if (mtip_check_surprise_removal( | |
994 | dd->pdev)) { | |
995 | mtip_command_cleanup(dd); | |
996 | return; | |
997 | } | |
998 | } | |
999 | } | |
1000 | } | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | /* | |
1005 | * Process legacy pio and d2h interrupts | |
1006 | */ | |
1007 | static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat) | |
1008 | { | |
1009 | struct mtip_port *port = dd->port; | |
1010 | struct mtip_cmd *cmd = &port->commands[MTIP_TAG_INTERNAL]; | |
1011 | ||
8a857a88 | 1012 | if (test_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags) && |
60ec0eec | 1013 | (cmd != NULL) && !(readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
88523a61 SB |
1014 | & (1 << MTIP_TAG_INTERNAL))) { |
1015 | if (cmd->comp_func) { | |
1016 | cmd->comp_func(port, | |
1017 | MTIP_TAG_INTERNAL, | |
1018 | cmd->comp_data, | |
1019 | 0); | |
1020 | return; | |
1021 | } | |
1022 | } | |
1023 | ||
88523a61 SB |
1024 | return; |
1025 | } | |
1026 | ||
1027 | /* | |
1028 | * Demux and handle errors | |
1029 | */ | |
1030 | static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat) | |
1031 | { | |
1032 | if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) | |
1033 | mtip_handle_tfe(dd); | |
1034 | ||
1035 | if (unlikely(port_stat & PORT_IRQ_CONNECT)) { | |
1036 | dev_warn(&dd->pdev->dev, | |
1037 | "Clearing PxSERR.DIAG.x\n"); | |
1038 | writel((1 << 26), dd->port->mmio + PORT_SCR_ERR); | |
1039 | } | |
1040 | ||
1041 | if (unlikely(port_stat & PORT_IRQ_PHYRDY)) { | |
1042 | dev_warn(&dd->pdev->dev, | |
1043 | "Clearing PxSERR.DIAG.n\n"); | |
1044 | writel((1 << 16), dd->port->mmio + PORT_SCR_ERR); | |
1045 | } | |
1046 | ||
1047 | if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) { | |
1048 | dev_warn(&dd->pdev->dev, | |
1049 | "Port stat errors %x unhandled\n", | |
1050 | (port_stat & ~PORT_IRQ_HANDLED)); | |
1051 | } | |
1052 | } | |
1053 | ||
1054 | static inline irqreturn_t mtip_handle_irq(struct driver_data *data) | |
1055 | { | |
1056 | struct driver_data *dd = (struct driver_data *) data; | |
1057 | struct mtip_port *port = dd->port; | |
1058 | u32 hba_stat, port_stat; | |
1059 | int rv = IRQ_NONE; | |
1060 | ||
1061 | hba_stat = readl(dd->mmio + HOST_IRQ_STAT); | |
1062 | if (hba_stat) { | |
1063 | rv = IRQ_HANDLED; | |
1064 | ||
1065 | /* Acknowledge the interrupt status on the port.*/ | |
1066 | port_stat = readl(port->mmio + PORT_IRQ_STAT); | |
1067 | writel(port_stat, port->mmio + PORT_IRQ_STAT); | |
1068 | ||
1069 | /* Demux port status */ | |
1070 | if (likely(port_stat & PORT_IRQ_SDB_FIS)) | |
1071 | mtip_process_sdbf(dd); | |
1072 | ||
1073 | if (unlikely(port_stat & PORT_IRQ_ERR)) { | |
1074 | if (unlikely(mtip_check_surprise_removal(dd->pdev))) { | |
1075 | mtip_command_cleanup(dd); | |
1076 | /* don't proceed further */ | |
1077 | return IRQ_HANDLED; | |
1078 | } | |
8a857a88 | 1079 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
45038367 AT |
1080 | &dd->dd_flag)) |
1081 | return rv; | |
88523a61 SB |
1082 | |
1083 | mtip_process_errors(dd, port_stat & PORT_IRQ_ERR); | |
1084 | } | |
1085 | ||
1086 | if (unlikely(port_stat & PORT_IRQ_LEGACY)) | |
1087 | mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY); | |
1088 | } | |
1089 | ||
1090 | /* acknowledge interrupt */ | |
1091 | writel(hba_stat, dd->mmio + HOST_IRQ_STAT); | |
1092 | ||
1093 | return rv; | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * Wrapper for mtip_handle_irq | |
1098 | * (ignores return code) | |
1099 | */ | |
1100 | static void mtip_tasklet(unsigned long data) | |
1101 | { | |
1102 | mtip_handle_irq((struct driver_data *) data); | |
1103 | } | |
1104 | ||
1105 | /* | |
1106 | * HBA interrupt subroutine. | |
1107 | * | |
1108 | * @irq IRQ number. | |
1109 | * @instance Pointer to the driver data structure. | |
1110 | * | |
1111 | * return value | |
1112 | * IRQ_HANDLED A HBA interrupt was pending and handled. | |
1113 | * IRQ_NONE This interrupt was not for the HBA. | |
1114 | */ | |
1115 | static irqreturn_t mtip_irq_handler(int irq, void *instance) | |
1116 | { | |
1117 | struct driver_data *dd = instance; | |
1118 | tasklet_schedule(&dd->tasklet); | |
1119 | return IRQ_HANDLED; | |
1120 | } | |
1121 | ||
1122 | static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag) | |
1123 | { | |
1124 | atomic_set(&port->commands[tag].active, 1); | |
1125 | writel(1 << MTIP_TAG_BIT(tag), | |
1126 | port->cmd_issue[MTIP_TAG_INDEX(tag)]); | |
1127 | } | |
1128 | ||
c74b0f58 AT |
1129 | static bool mtip_pause_ncq(struct mtip_port *port, |
1130 | struct host_to_dev_fis *fis) | |
1131 | { | |
1132 | struct host_to_dev_fis *reply; | |
1133 | unsigned long task_file_data; | |
1134 | ||
1135 | reply = port->rxfis + RX_FIS_D2H_REG; | |
1136 | task_file_data = readl(port->mmio+PORT_TFDATA); | |
1137 | ||
1138 | if ((task_file_data & 1) || (fis->command == ATA_CMD_SEC_ERASE_UNIT)) | |
1139 | return false; | |
1140 | ||
1141 | if (fis->command == ATA_CMD_SEC_ERASE_PREP) { | |
1142 | set_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); | |
1143 | port->ic_pause_timer = jiffies; | |
1144 | return true; | |
1145 | } else if ((fis->command == ATA_CMD_DOWNLOAD_MICRO) && | |
1146 | (fis->features == 0x03)) { | |
1147 | set_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); | |
1148 | port->ic_pause_timer = jiffies; | |
1149 | return true; | |
1150 | } else if ((fis->command == ATA_CMD_SEC_ERASE_UNIT) || | |
1151 | ((fis->command == 0xFC) && | |
1152 | (fis->features == 0x27 || fis->features == 0x72 || | |
1153 | fis->features == 0x62 || fis->features == 0x26))) { | |
1154 | /* Com reset after secure erase or lowlevel format */ | |
1155 | mtip_restart_port(port); | |
1156 | return false; | |
1157 | } | |
1158 | ||
1159 | return false; | |
1160 | } | |
1161 | ||
88523a61 SB |
1162 | /* |
1163 | * Wait for port to quiesce | |
1164 | * | |
1165 | * @port Pointer to port data structure | |
1166 | * @timeout Max duration to wait (ms) | |
1167 | * | |
1168 | * return value | |
1169 | * 0 Success | |
1170 | * -EBUSY Commands still active | |
1171 | */ | |
1172 | static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) | |
1173 | { | |
1174 | unsigned long to; | |
3e54a3d1 DC |
1175 | unsigned int n; |
1176 | unsigned int active = 1; | |
88523a61 SB |
1177 | |
1178 | to = jiffies + msecs_to_jiffies(timeout); | |
1179 | do { | |
8a857a88 AT |
1180 | if (test_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags) && |
1181 | test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { | |
60ec0eec AT |
1182 | msleep(20); |
1183 | continue; /* svc thd is actively issuing commands */ | |
1184 | } | |
8a857a88 | 1185 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
45038367 | 1186 | return -EFAULT; |
88523a61 SB |
1187 | /* |
1188 | * Ignore s_active bit 0 of array element 0. | |
1189 | * This bit will always be set | |
1190 | */ | |
60ec0eec | 1191 | active = readl(port->s_active[0]) & 0xFFFFFFFE; |
88523a61 SB |
1192 | for (n = 1; n < port->dd->slot_groups; n++) |
1193 | active |= readl(port->s_active[n]); | |
1194 | ||
1195 | if (!active) | |
1196 | break; | |
1197 | ||
1198 | msleep(20); | |
1199 | } while (time_before(jiffies, to)); | |
1200 | ||
1201 | return active ? -EBUSY : 0; | |
1202 | } | |
1203 | ||
1204 | /* | |
1205 | * Execute an internal command and wait for the completion. | |
1206 | * | |
1207 | * @port Pointer to the port data structure. | |
1208 | * @fis Pointer to the FIS that describes the command. | |
60ec0eec | 1209 | * @fis_len Length in WORDS of the FIS. |
88523a61 | 1210 | * @buffer DMA accessible for command data. |
60ec0eec | 1211 | * @buf_len Length, in bytes, of the data buffer. |
88523a61 SB |
1212 | * @opts Command header options, excluding the FIS length |
1213 | * and the number of PRD entries. | |
1214 | * @timeout Time in ms to wait for the command to complete. | |
1215 | * | |
1216 | * return value | |
1217 | * 0 Command completed successfully. | |
1218 | * -EFAULT The buffer address is not correctly aligned. | |
1219 | * -EBUSY Internal command or other IO in progress. | |
1220 | * -EAGAIN Time out waiting for command to complete. | |
1221 | */ | |
1222 | static int mtip_exec_internal_command(struct mtip_port *port, | |
8182b495 | 1223 | struct host_to_dev_fis *fis, |
60ec0eec | 1224 | int fis_len, |
88523a61 | 1225 | dma_addr_t buffer, |
60ec0eec | 1226 | int buf_len, |
88523a61 SB |
1227 | u32 opts, |
1228 | gfp_t atomic, | |
1229 | unsigned long timeout) | |
1230 | { | |
1231 | struct mtip_cmd_sg *command_sg; | |
1232 | DECLARE_COMPLETION_ONSTACK(wait); | |
c74b0f58 | 1233 | int rv = 0, ready2go = 1; |
88523a61 | 1234 | struct mtip_cmd *int_cmd = &port->commands[MTIP_TAG_INTERNAL]; |
c74b0f58 | 1235 | unsigned long to; |
88523a61 SB |
1236 | |
1237 | /* Make sure the buffer is 8 byte aligned. This is asic specific. */ | |
1238 | if (buffer & 0x00000007) { | |
1239 | dev_err(&port->dd->pdev->dev, | |
1240 | "SG buffer is not 8 byte aligned\n"); | |
1241 | return -EFAULT; | |
1242 | } | |
1243 | ||
c74b0f58 AT |
1244 | to = jiffies + msecs_to_jiffies(timeout); |
1245 | do { | |
1246 | ready2go = !test_and_set_bit(MTIP_TAG_INTERNAL, | |
1247 | port->allocated); | |
1248 | if (ready2go) | |
1249 | break; | |
1250 | mdelay(100); | |
1251 | } while (time_before(jiffies, to)); | |
1252 | if (!ready2go) { | |
88523a61 | 1253 | dev_warn(&port->dd->pdev->dev, |
c74b0f58 | 1254 | "Internal cmd active. new cmd [%02X]\n", fis->command); |
88523a61 SB |
1255 | return -EBUSY; |
1256 | } | |
8a857a88 | 1257 | set_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
c74b0f58 AT |
1258 | port->ic_pause_timer = 0; |
1259 | ||
1260 | if (fis->command == ATA_CMD_SEC_ERASE_UNIT) | |
1261 | clear_bit(MTIP_PF_SE_ACTIVE_BIT, &port->flags); | |
1262 | else if (fis->command == ATA_CMD_DOWNLOAD_MICRO) | |
1263 | clear_bit(MTIP_PF_DM_ACTIVE_BIT, &port->flags); | |
88523a61 SB |
1264 | |
1265 | if (atomic == GFP_KERNEL) { | |
8182b495 AT |
1266 | if (fis->command != ATA_CMD_STANDBYNOW1) { |
1267 | /* wait for io to complete if non atomic */ | |
1268 | if (mtip_quiesce_io(port, 5000) < 0) { | |
1269 | dev_warn(&port->dd->pdev->dev, | |
1270 | "Failed to quiesce IO\n"); | |
1271 | release_slot(port, MTIP_TAG_INTERNAL); | |
8a857a88 | 1272 | clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
8182b495 AT |
1273 | wake_up_interruptible(&port->svc_wait); |
1274 | return -EBUSY; | |
1275 | } | |
88523a61 SB |
1276 | } |
1277 | ||
1278 | /* Set the completion function and data for the command. */ | |
1279 | int_cmd->comp_data = &wait; | |
1280 | int_cmd->comp_func = mtip_completion; | |
1281 | ||
1282 | } else { | |
1283 | /* Clear completion - we're going to poll */ | |
1284 | int_cmd->comp_data = NULL; | |
8182b495 | 1285 | int_cmd->comp_func = mtip_null_completion; |
88523a61 SB |
1286 | } |
1287 | ||
1288 | /* Copy the command to the command table */ | |
60ec0eec | 1289 | memcpy(int_cmd->command, fis, fis_len*4); |
88523a61 SB |
1290 | |
1291 | /* Populate the SG list */ | |
1292 | int_cmd->command_header->opts = | |
60ec0eec AT |
1293 | __force_bit2int cpu_to_le32(opts | fis_len); |
1294 | if (buf_len) { | |
88523a61 SB |
1295 | command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ; |
1296 | ||
60ec0eec AT |
1297 | command_sg->info = |
1298 | __force_bit2int cpu_to_le32((buf_len-1) & 0x3FFFFF); | |
1299 | command_sg->dba = | |
1300 | __force_bit2int cpu_to_le32(buffer & 0xFFFFFFFF); | |
1301 | command_sg->dba_upper = | |
1302 | __force_bit2int cpu_to_le32((buffer >> 16) >> 16); | |
88523a61 | 1303 | |
60ec0eec AT |
1304 | int_cmd->command_header->opts |= |
1305 | __force_bit2int cpu_to_le32((1 << 16)); | |
88523a61 SB |
1306 | } |
1307 | ||
1308 | /* Populate the command header */ | |
1309 | int_cmd->command_header->byte_count = 0; | |
1310 | ||
1311 | /* Issue the command to the hardware */ | |
1312 | mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL); | |
1313 | ||
1314 | /* Poll if atomic, wait_for_completion otherwise */ | |
1315 | if (atomic == GFP_KERNEL) { | |
1316 | /* Wait for the command to complete or timeout. */ | |
1317 | if (wait_for_completion_timeout( | |
1318 | &wait, | |
1319 | msecs_to_jiffies(timeout)) == 0) { | |
1320 | dev_err(&port->dd->pdev->dev, | |
60ec0eec AT |
1321 | "Internal command did not complete [%d] " |
1322 | "within timeout of %lu ms\n", | |
1323 | atomic, timeout); | |
45038367 | 1324 | if (mtip_check_surprise_removal(port->dd->pdev) || |
8a857a88 | 1325 | test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
45038367 AT |
1326 | &port->dd->dd_flag)) { |
1327 | rv = -ENXIO; | |
1328 | goto exec_ic_exit; | |
1329 | } | |
88523a61 SB |
1330 | rv = -EAGAIN; |
1331 | } | |
1332 | ||
1333 | if (readl(port->cmd_issue[MTIP_TAG_INTERNAL]) | |
1334 | & (1 << MTIP_TAG_INTERNAL)) { | |
1335 | dev_warn(&port->dd->pdev->dev, | |
1336 | "Retiring internal command but CI is 1.\n"); | |
8a857a88 | 1337 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
45038367 AT |
1338 | &port->dd->dd_flag)) { |
1339 | hba_reset_nosleep(port->dd); | |
1340 | rv = -ENXIO; | |
1341 | } else { | |
1342 | mtip_restart_port(port); | |
1343 | rv = -EAGAIN; | |
1344 | } | |
1345 | goto exec_ic_exit; | |
88523a61 SB |
1346 | } |
1347 | ||
1348 | } else { | |
1349 | /* Spin for <timeout> checking if command still outstanding */ | |
1350 | timeout = jiffies + msecs_to_jiffies(timeout); | |
8182b495 AT |
1351 | while ((readl(port->cmd_issue[MTIP_TAG_INTERNAL]) |
1352 | & (1 << MTIP_TAG_INTERNAL)) | |
1353 | && time_before(jiffies, timeout)) { | |
1354 | if (mtip_check_surprise_removal(port->dd->pdev)) { | |
1355 | rv = -ENXIO; | |
1356 | goto exec_ic_exit; | |
1357 | } | |
1358 | if ((fis->command != ATA_CMD_STANDBYNOW1) && | |
8a857a88 | 1359 | test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
45038367 AT |
1360 | &port->dd->dd_flag)) { |
1361 | rv = -ENXIO; | |
1362 | goto exec_ic_exit; | |
1363 | } | |
1364 | } | |
88523a61 SB |
1365 | |
1366 | if (readl(port->cmd_issue[MTIP_TAG_INTERNAL]) | |
1367 | & (1 << MTIP_TAG_INTERNAL)) { | |
1368 | dev_err(&port->dd->pdev->dev, | |
8182b495 | 1369 | "Internal command did not complete [atomic]\n"); |
88523a61 | 1370 | rv = -EAGAIN; |
8a857a88 | 1371 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
45038367 AT |
1372 | &port->dd->dd_flag)) { |
1373 | hba_reset_nosleep(port->dd); | |
1374 | rv = -ENXIO; | |
1375 | } else { | |
1376 | mtip_restart_port(port); | |
1377 | rv = -EAGAIN; | |
1378 | } | |
88523a61 SB |
1379 | } |
1380 | } | |
45038367 | 1381 | exec_ic_exit: |
88523a61 SB |
1382 | /* Clear the allocated and active bits for the internal command. */ |
1383 | atomic_set(&int_cmd->active, 0); | |
1384 | release_slot(port, MTIP_TAG_INTERNAL); | |
c74b0f58 AT |
1385 | if (rv >= 0 && mtip_pause_ncq(port, fis)) { |
1386 | /* NCQ paused */ | |
1387 | return rv; | |
1388 | } | |
8a857a88 | 1389 | clear_bit(MTIP_PF_IC_ACTIVE_BIT, &port->flags); |
60ec0eec | 1390 | wake_up_interruptible(&port->svc_wait); |
88523a61 SB |
1391 | |
1392 | return rv; | |
1393 | } | |
1394 | ||
1395 | /* | |
1396 | * Byte-swap ATA ID strings. | |
1397 | * | |
1398 | * ATA identify data contains strings in byte-swapped 16-bit words. | |
1399 | * They must be swapped (on all architectures) to be usable as C strings. | |
1400 | * This function swaps bytes in-place. | |
1401 | * | |
1402 | * @buf The buffer location of the string | |
1403 | * @len The number of bytes to swap | |
1404 | * | |
1405 | * return value | |
1406 | * None | |
1407 | */ | |
1408 | static inline void ata_swap_string(u16 *buf, unsigned int len) | |
1409 | { | |
1410 | int i; | |
1411 | for (i = 0; i < (len/2); i++) | |
1412 | be16_to_cpus(&buf[i]); | |
1413 | } | |
1414 | ||
1415 | /* | |
1416 | * Request the device identity information. | |
1417 | * | |
1418 | * If a user space buffer is not specified, i.e. is NULL, the | |
1419 | * identify information is still read from the drive and placed | |
1420 | * into the identify data buffer (@e port->identify) in the | |
1421 | * port data structure. | |
1422 | * When the identify buffer contains valid identify information @e | |
1423 | * port->identify_valid is non-zero. | |
1424 | * | |
1425 | * @port Pointer to the port structure. | |
1426 | * @user_buffer A user space buffer where the identify data should be | |
1427 | * copied. | |
1428 | * | |
1429 | * return value | |
1430 | * 0 Command completed successfully. | |
1431 | * -EFAULT An error occurred while coping data to the user buffer. | |
1432 | * -1 Command failed. | |
1433 | */ | |
1434 | static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer) | |
1435 | { | |
1436 | int rv = 0; | |
1437 | struct host_to_dev_fis fis; | |
1438 | ||
8a857a88 | 1439 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &port->dd->dd_flag)) |
45038367 AT |
1440 | return -EFAULT; |
1441 | ||
88523a61 SB |
1442 | /* Build the FIS. */ |
1443 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1444 | fis.type = 0x27; | |
1445 | fis.opts = 1 << 7; | |
1446 | fis.command = ATA_CMD_ID_ATA; | |
1447 | ||
1448 | /* Set the identify information as invalid. */ | |
1449 | port->identify_valid = 0; | |
1450 | ||
1451 | /* Clear the identify information. */ | |
1452 | memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS); | |
1453 | ||
1454 | /* Execute the command. */ | |
1455 | if (mtip_exec_internal_command(port, | |
1456 | &fis, | |
1457 | 5, | |
1458 | port->identify_dma, | |
1459 | sizeof(u16) * ATA_ID_WORDS, | |
1460 | 0, | |
1461 | GFP_KERNEL, | |
1462 | MTIP_INTERNAL_COMMAND_TIMEOUT_MS) | |
1463 | < 0) { | |
1464 | rv = -1; | |
1465 | goto out; | |
1466 | } | |
1467 | ||
1468 | /* | |
1469 | * Perform any necessary byte-swapping. Yes, the kernel does in fact | |
1470 | * perform field-sensitive swapping on the string fields. | |
1471 | * See the kernel use of ata_id_string() for proof of this. | |
1472 | */ | |
1473 | #ifdef __LITTLE_ENDIAN | |
1474 | ata_swap_string(port->identify + 27, 40); /* model string*/ | |
1475 | ata_swap_string(port->identify + 23, 8); /* firmware string*/ | |
1476 | ata_swap_string(port->identify + 10, 20); /* serial# string*/ | |
1477 | #else | |
1478 | { | |
1479 | int i; | |
1480 | for (i = 0; i < ATA_ID_WORDS; i++) | |
1481 | port->identify[i] = le16_to_cpu(port->identify[i]); | |
1482 | } | |
1483 | #endif | |
1484 | ||
1485 | /* Set the identify buffer as valid. */ | |
1486 | port->identify_valid = 1; | |
1487 | ||
1488 | if (user_buffer) { | |
1489 | if (copy_to_user( | |
1490 | user_buffer, | |
1491 | port->identify, | |
1492 | ATA_ID_WORDS * sizeof(u16))) { | |
1493 | rv = -EFAULT; | |
1494 | goto out; | |
1495 | } | |
1496 | } | |
1497 | ||
1498 | out: | |
88523a61 SB |
1499 | return rv; |
1500 | } | |
1501 | ||
1502 | /* | |
1503 | * Issue a standby immediate command to the device. | |
1504 | * | |
1505 | * @port Pointer to the port structure. | |
1506 | * | |
1507 | * return value | |
1508 | * 0 Command was executed successfully. | |
1509 | * -1 An error occurred while executing the command. | |
1510 | */ | |
1511 | static int mtip_standby_immediate(struct mtip_port *port) | |
1512 | { | |
1513 | int rv; | |
1514 | struct host_to_dev_fis fis; | |
f6587217 | 1515 | unsigned long start; |
88523a61 | 1516 | |
88523a61 SB |
1517 | /* Build the FIS. */ |
1518 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1519 | fis.type = 0x27; | |
1520 | fis.opts = 1 << 7; | |
1521 | fis.command = ATA_CMD_STANDBYNOW1; | |
1522 | ||
f6587217 | 1523 | start = jiffies; |
88523a61 SB |
1524 | rv = mtip_exec_internal_command(port, |
1525 | &fis, | |
1526 | 5, | |
1527 | 0, | |
1528 | 0, | |
1529 | 0, | |
f6587217 AT |
1530 | GFP_ATOMIC, |
1531 | 15000); | |
1532 | dbg_printk(MTIP_DRV_NAME "Time taken to complete standby cmd: %d ms\n", | |
1533 | jiffies_to_msecs(jiffies - start)); | |
1534 | if (rv) | |
1535 | dev_warn(&port->dd->pdev->dev, | |
1536 | "STANDBY IMMEDIATE command failed.\n"); | |
1537 | ||
1538 | return rv; | |
1539 | } | |
1540 | ||
1541 | /* | |
1542 | * Issue a READ LOG EXT command to the device. | |
1543 | * | |
1544 | * @port pointer to the port structure. | |
1545 | * @page page number to fetch | |
1546 | * @buffer pointer to buffer | |
1547 | * @buffer_dma dma address corresponding to @buffer | |
1548 | * @sectors page length to fetch, in sectors | |
1549 | * | |
1550 | * return value | |
1551 | * @rv return value from mtip_exec_internal_command() | |
1552 | */ | |
1553 | static int mtip_read_log_page(struct mtip_port *port, u8 page, u16 *buffer, | |
1554 | dma_addr_t buffer_dma, unsigned int sectors) | |
1555 | { | |
1556 | struct host_to_dev_fis fis; | |
1557 | ||
1558 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1559 | fis.type = 0x27; | |
1560 | fis.opts = 1 << 7; | |
1561 | fis.command = ATA_CMD_READ_LOG_EXT; | |
1562 | fis.sect_count = sectors & 0xFF; | |
1563 | fis.sect_cnt_ex = (sectors >> 8) & 0xFF; | |
1564 | fis.lba_low = page; | |
1565 | fis.lba_mid = 0; | |
1566 | fis.device = ATA_DEVICE_OBS; | |
1567 | ||
1568 | memset(buffer, 0, sectors * ATA_SECT_SIZE); | |
1569 | ||
1570 | return mtip_exec_internal_command(port, | |
1571 | &fis, | |
1572 | 5, | |
1573 | buffer_dma, | |
1574 | sectors * ATA_SECT_SIZE, | |
1575 | 0, | |
1576 | GFP_ATOMIC, | |
1577 | MTIP_INTERNAL_COMMAND_TIMEOUT_MS); | |
1578 | } | |
1579 | ||
1580 | /* | |
1581 | * Issue a SMART READ DATA command to the device. | |
1582 | * | |
1583 | * @port pointer to the port structure. | |
1584 | * @buffer pointer to buffer | |
1585 | * @buffer_dma dma address corresponding to @buffer | |
1586 | * | |
1587 | * return value | |
1588 | * @rv return value from mtip_exec_internal_command() | |
1589 | */ | |
1590 | static int mtip_get_smart_data(struct mtip_port *port, u8 *buffer, | |
1591 | dma_addr_t buffer_dma) | |
1592 | { | |
1593 | struct host_to_dev_fis fis; | |
1594 | ||
1595 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1596 | fis.type = 0x27; | |
1597 | fis.opts = 1 << 7; | |
1598 | fis.command = ATA_CMD_SMART; | |
1599 | fis.features = 0xD0; | |
1600 | fis.sect_count = 1; | |
1601 | fis.lba_mid = 0x4F; | |
1602 | fis.lba_hi = 0xC2; | |
1603 | fis.device = ATA_DEVICE_OBS; | |
1604 | ||
1605 | return mtip_exec_internal_command(port, | |
1606 | &fis, | |
1607 | 5, | |
1608 | buffer_dma, | |
1609 | ATA_SECT_SIZE, | |
1610 | 0, | |
1611 | GFP_ATOMIC, | |
88523a61 | 1612 | 15000); |
f6587217 AT |
1613 | } |
1614 | ||
1615 | /* | |
1616 | * Get the value of a smart attribute | |
1617 | * | |
1618 | * @port pointer to the port structure | |
1619 | * @id attribute number | |
1620 | * @attrib pointer to return attrib information corresponding to @id | |
1621 | * | |
1622 | * return value | |
1623 | * -EINVAL NULL buffer passed or unsupported attribute @id. | |
1624 | * -EPERM Identify data not valid, SMART not supported or not enabled | |
1625 | */ | |
1626 | static int mtip_get_smart_attr(struct mtip_port *port, unsigned int id, | |
1627 | struct smart_attr *attrib) | |
1628 | { | |
1629 | int rv, i; | |
1630 | struct smart_attr *pattr; | |
1631 | ||
1632 | if (!attrib) | |
1633 | return -EINVAL; | |
1634 | ||
1635 | if (!port->identify_valid) { | |
1636 | dev_warn(&port->dd->pdev->dev, "IDENTIFY DATA not valid\n"); | |
1637 | return -EPERM; | |
1638 | } | |
1639 | if (!(port->identify[82] & 0x1)) { | |
1640 | dev_warn(&port->dd->pdev->dev, "SMART not supported\n"); | |
1641 | return -EPERM; | |
1642 | } | |
1643 | if (!(port->identify[85] & 0x1)) { | |
1644 | dev_warn(&port->dd->pdev->dev, "SMART not enabled\n"); | |
1645 | return -EPERM; | |
1646 | } | |
1647 | ||
1648 | memset(port->smart_buf, 0, ATA_SECT_SIZE); | |
1649 | rv = mtip_get_smart_data(port, port->smart_buf, port->smart_buf_dma); | |
1650 | if (rv) { | |
1651 | dev_warn(&port->dd->pdev->dev, "Failed to ge SMART data\n"); | |
1652 | return rv; | |
1653 | } | |
1654 | ||
1655 | pattr = (struct smart_attr *)(port->smart_buf + 2); | |
1656 | for (i = 0; i < 29; i++, pattr++) | |
1657 | if (pattr->attr_id == id) { | |
1658 | memcpy(attrib, pattr, sizeof(struct smart_attr)); | |
1659 | break; | |
1660 | } | |
1661 | ||
1662 | if (i == 29) { | |
1663 | dev_warn(&port->dd->pdev->dev, | |
1664 | "Query for invalid SMART attribute ID\n"); | |
1665 | rv = -EINVAL; | |
1666 | } | |
88523a61 | 1667 | |
88523a61 SB |
1668 | return rv; |
1669 | } | |
1670 | ||
1671 | /* | |
1672 | * Get the drive capacity. | |
1673 | * | |
1674 | * @dd Pointer to the device data structure. | |
1675 | * @sectors Pointer to the variable that will receive the sector count. | |
1676 | * | |
1677 | * return value | |
1678 | * 1 Capacity was returned successfully. | |
1679 | * 0 The identify information is invalid. | |
1680 | */ | |
6316668f | 1681 | static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors) |
88523a61 SB |
1682 | { |
1683 | struct mtip_port *port = dd->port; | |
1684 | u64 total, raw0, raw1, raw2, raw3; | |
1685 | raw0 = port->identify[100]; | |
1686 | raw1 = port->identify[101]; | |
1687 | raw2 = port->identify[102]; | |
1688 | raw3 = port->identify[103]; | |
1689 | total = raw0 | raw1<<16 | raw2<<32 | raw3<<48; | |
1690 | *sectors = total; | |
1691 | return (bool) !!port->identify_valid; | |
1692 | } | |
1693 | ||
1694 | /* | |
1695 | * Reset the HBA. | |
1696 | * | |
1697 | * Resets the HBA by setting the HBA Reset bit in the Global | |
1698 | * HBA Control register. After setting the HBA Reset bit the | |
1699 | * function waits for 1 second before reading the HBA Reset | |
1700 | * bit to make sure it has cleared. If HBA Reset is not clear | |
1701 | * an error is returned. Cannot be used in non-blockable | |
1702 | * context. | |
1703 | * | |
1704 | * @dd Pointer to the driver data structure. | |
1705 | * | |
1706 | * return value | |
1707 | * 0 The reset was successful. | |
1708 | * -1 The HBA Reset bit did not clear. | |
1709 | */ | |
1710 | static int mtip_hba_reset(struct driver_data *dd) | |
1711 | { | |
1712 | mtip_deinit_port(dd->port); | |
1713 | ||
1714 | /* Set the reset bit */ | |
1715 | writel(HOST_RESET, dd->mmio + HOST_CTL); | |
1716 | ||
1717 | /* Flush */ | |
1718 | readl(dd->mmio + HOST_CTL); | |
1719 | ||
1720 | /* Wait for reset to clear */ | |
1721 | ssleep(1); | |
1722 | ||
1723 | /* Check the bit has cleared */ | |
1724 | if (readl(dd->mmio + HOST_CTL) & HOST_RESET) { | |
1725 | dev_err(&dd->pdev->dev, | |
1726 | "Reset bit did not clear.\n"); | |
1727 | return -1; | |
1728 | } | |
1729 | ||
1730 | return 0; | |
1731 | } | |
1732 | ||
1733 | /* | |
1734 | * Display the identify command data. | |
1735 | * | |
1736 | * @port Pointer to the port data structure. | |
1737 | * | |
1738 | * return value | |
1739 | * None | |
1740 | */ | |
1741 | static void mtip_dump_identify(struct mtip_port *port) | |
1742 | { | |
1743 | sector_t sectors; | |
1744 | unsigned short revid; | |
1745 | char cbuf[42]; | |
1746 | ||
1747 | if (!port->identify_valid) | |
1748 | return; | |
1749 | ||
1750 | strlcpy(cbuf, (char *)(port->identify+10), 21); | |
1751 | dev_info(&port->dd->pdev->dev, | |
1752 | "Serial No.: %s\n", cbuf); | |
1753 | ||
1754 | strlcpy(cbuf, (char *)(port->identify+23), 9); | |
1755 | dev_info(&port->dd->pdev->dev, | |
1756 | "Firmware Ver.: %s\n", cbuf); | |
1757 | ||
1758 | strlcpy(cbuf, (char *)(port->identify+27), 41); | |
1759 | dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf); | |
1760 | ||
1761 | if (mtip_hw_get_capacity(port->dd, §ors)) | |
1762 | dev_info(&port->dd->pdev->dev, | |
1763 | "Capacity: %llu sectors (%llu MB)\n", | |
1764 | (u64)sectors, | |
1765 | ((u64)sectors) * ATA_SECT_SIZE >> 20); | |
1766 | ||
1767 | pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid); | |
60ec0eec | 1768 | switch (revid & 0xFF) { |
88523a61 SB |
1769 | case 0x1: |
1770 | strlcpy(cbuf, "A0", 3); | |
1771 | break; | |
1772 | case 0x3: | |
1773 | strlcpy(cbuf, "A2", 3); | |
1774 | break; | |
1775 | default: | |
1776 | strlcpy(cbuf, "?", 2); | |
1777 | break; | |
1778 | } | |
1779 | dev_info(&port->dd->pdev->dev, | |
1780 | "Card Type: %s\n", cbuf); | |
1781 | } | |
1782 | ||
1783 | /* | |
1784 | * Map the commands scatter list into the command table. | |
1785 | * | |
1786 | * @command Pointer to the command. | |
1787 | * @nents Number of scatter list entries. | |
1788 | * | |
1789 | * return value | |
1790 | * None | |
1791 | */ | |
1792 | static inline void fill_command_sg(struct driver_data *dd, | |
1793 | struct mtip_cmd *command, | |
1794 | int nents) | |
1795 | { | |
1796 | int n; | |
1797 | unsigned int dma_len; | |
1798 | struct mtip_cmd_sg *command_sg; | |
1799 | struct scatterlist *sg = command->sg; | |
1800 | ||
1801 | command_sg = command->command + AHCI_CMD_TBL_HDR_SZ; | |
1802 | ||
1803 | for (n = 0; n < nents; n++) { | |
1804 | dma_len = sg_dma_len(sg); | |
1805 | if (dma_len > 0x400000) | |
1806 | dev_err(&dd->pdev->dev, | |
1807 | "DMA segment length truncated\n"); | |
60ec0eec AT |
1808 | command_sg->info = __force_bit2int |
1809 | cpu_to_le32((dma_len-1) & 0x3FFFFF); | |
1810 | command_sg->dba = __force_bit2int | |
1811 | cpu_to_le32(sg_dma_address(sg)); | |
1812 | command_sg->dba_upper = __force_bit2int | |
1813 | cpu_to_le32((sg_dma_address(sg) >> 16) >> 16); | |
88523a61 SB |
1814 | command_sg++; |
1815 | sg++; | |
1816 | } | |
1817 | } | |
1818 | ||
1819 | /* | |
1820 | * @brief Execute a drive command. | |
1821 | * | |
1822 | * return value 0 The command completed successfully. | |
1823 | * return value -1 An error occurred while executing the command. | |
1824 | */ | |
6316668f | 1825 | static int exec_drive_task(struct mtip_port *port, u8 *command) |
88523a61 SB |
1826 | { |
1827 | struct host_to_dev_fis fis; | |
1828 | struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG); | |
1829 | ||
88523a61 SB |
1830 | /* Build the FIS. */ |
1831 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1832 | fis.type = 0x27; | |
1833 | fis.opts = 1 << 7; | |
1834 | fis.command = command[0]; | |
1835 | fis.features = command[1]; | |
1836 | fis.sect_count = command[2]; | |
1837 | fis.sector = command[3]; | |
1838 | fis.cyl_low = command[4]; | |
1839 | fis.cyl_hi = command[5]; | |
1840 | fis.device = command[6] & ~0x10; /* Clear the dev bit*/ | |
1841 | ||
c74b0f58 | 1842 | dbg_printk(MTIP_DRV_NAME " %s: User Command: cmd %x, feat %x, nsect %x, sect %x, lcyl %x, hcyl %x, sel %x\n", |
88523a61 SB |
1843 | __func__, |
1844 | command[0], | |
1845 | command[1], | |
1846 | command[2], | |
1847 | command[3], | |
1848 | command[4], | |
1849 | command[5], | |
1850 | command[6]); | |
1851 | ||
1852 | /* Execute the command. */ | |
1853 | if (mtip_exec_internal_command(port, | |
1854 | &fis, | |
1855 | 5, | |
1856 | 0, | |
1857 | 0, | |
1858 | 0, | |
1859 | GFP_KERNEL, | |
1860 | MTIP_IOCTL_COMMAND_TIMEOUT_MS) < 0) { | |
88523a61 SB |
1861 | return -1; |
1862 | } | |
1863 | ||
1864 | command[0] = reply->command; /* Status*/ | |
1865 | command[1] = reply->features; /* Error*/ | |
1866 | command[4] = reply->cyl_low; | |
1867 | command[5] = reply->cyl_hi; | |
1868 | ||
c74b0f58 | 1869 | dbg_printk(MTIP_DRV_NAME " %s: Completion Status: stat %x, err %x , cyl_lo %x cyl_hi %x\n", |
88523a61 SB |
1870 | __func__, |
1871 | command[0], | |
1872 | command[1], | |
1873 | command[4], | |
1874 | command[5]); | |
1875 | ||
88523a61 SB |
1876 | return 0; |
1877 | } | |
1878 | ||
1879 | /* | |
1880 | * @brief Execute a drive command. | |
1881 | * | |
1882 | * @param port Pointer to the port data structure. | |
1883 | * @param command Pointer to the user specified command parameters. | |
1884 | * @param user_buffer Pointer to the user space buffer where read sector | |
1885 | * data should be copied. | |
1886 | * | |
1887 | * return value 0 The command completed successfully. | |
1888 | * return value -EFAULT An error occurred while copying the completion | |
1889 | * data to the user space buffer. | |
1890 | * return value -1 An error occurred while executing the command. | |
1891 | */ | |
6316668f JA |
1892 | static int exec_drive_command(struct mtip_port *port, u8 *command, |
1893 | void __user *user_buffer) | |
88523a61 SB |
1894 | { |
1895 | struct host_to_dev_fis fis; | |
1896 | struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG); | |
1897 | ||
88523a61 SB |
1898 | /* Build the FIS. */ |
1899 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1900 | fis.type = 0x27; | |
1901 | fis.opts = 1 << 7; | |
1902 | fis.command = command[0]; | |
1903 | fis.features = command[2]; | |
1904 | fis.sect_count = command[3]; | |
1905 | if (fis.command == ATA_CMD_SMART) { | |
1906 | fis.sector = command[1]; | |
60ec0eec AT |
1907 | fis.cyl_low = 0x4F; |
1908 | fis.cyl_hi = 0xC2; | |
88523a61 SB |
1909 | } |
1910 | ||
1911 | dbg_printk(MTIP_DRV_NAME | |
c74b0f58 | 1912 | " %s: User Command: cmd %x, sect %x, " |
88523a61 SB |
1913 | "feat %x, sectcnt %x\n", |
1914 | __func__, | |
1915 | command[0], | |
1916 | command[1], | |
1917 | command[2], | |
1918 | command[3]); | |
1919 | ||
1920 | memset(port->sector_buffer, 0x00, ATA_SECT_SIZE); | |
1921 | ||
1922 | /* Execute the command. */ | |
1923 | if (mtip_exec_internal_command(port, | |
1924 | &fis, | |
1925 | 5, | |
1926 | port->sector_buffer_dma, | |
1927 | (command[3] != 0) ? ATA_SECT_SIZE : 0, | |
1928 | 0, | |
1929 | GFP_KERNEL, | |
1930 | MTIP_IOCTL_COMMAND_TIMEOUT_MS) | |
1931 | < 0) { | |
88523a61 SB |
1932 | return -1; |
1933 | } | |
1934 | ||
1935 | /* Collect the completion status. */ | |
1936 | command[0] = reply->command; /* Status*/ | |
1937 | command[1] = reply->features; /* Error*/ | |
1938 | command[2] = command[3]; | |
1939 | ||
1940 | dbg_printk(MTIP_DRV_NAME | |
c74b0f58 | 1941 | " %s: Completion Status: stat %x, " |
88523a61 SB |
1942 | "err %x, cmd %x\n", |
1943 | __func__, | |
1944 | command[0], | |
1945 | command[1], | |
1946 | command[2]); | |
1947 | ||
1948 | if (user_buffer && command[3]) { | |
1949 | if (copy_to_user(user_buffer, | |
1950 | port->sector_buffer, | |
1951 | ATA_SECT_SIZE * command[3])) { | |
88523a61 SB |
1952 | return -EFAULT; |
1953 | } | |
1954 | } | |
1955 | ||
88523a61 SB |
1956 | return 0; |
1957 | } | |
1958 | ||
1959 | /* | |
1960 | * Indicates whether a command has a single sector payload. | |
1961 | * | |
1962 | * @command passed to the device to perform the certain event. | |
1963 | * @features passed to the device to perform the certain event. | |
1964 | * | |
1965 | * return value | |
1966 | * 1 command is one that always has a single sector payload, | |
1967 | * regardless of the value in the Sector Count field. | |
1968 | * 0 otherwise | |
1969 | * | |
1970 | */ | |
1971 | static unsigned int implicit_sector(unsigned char command, | |
1972 | unsigned char features) | |
1973 | { | |
1974 | unsigned int rv = 0; | |
1975 | ||
1976 | /* list of commands that have an implicit sector count of 1 */ | |
1977 | switch (command) { | |
60ec0eec AT |
1978 | case ATA_CMD_SEC_SET_PASS: |
1979 | case ATA_CMD_SEC_UNLOCK: | |
1980 | case ATA_CMD_SEC_ERASE_PREP: | |
1981 | case ATA_CMD_SEC_ERASE_UNIT: | |
1982 | case ATA_CMD_SEC_FREEZE_LOCK: | |
1983 | case ATA_CMD_SEC_DISABLE_PASS: | |
1984 | case ATA_CMD_PMP_READ: | |
1985 | case ATA_CMD_PMP_WRITE: | |
88523a61 SB |
1986 | rv = 1; |
1987 | break; | |
60ec0eec AT |
1988 | case ATA_CMD_SET_MAX: |
1989 | if (features == ATA_SET_MAX_UNLOCK) | |
88523a61 SB |
1990 | rv = 1; |
1991 | break; | |
60ec0eec AT |
1992 | case ATA_CMD_SMART: |
1993 | if ((features == ATA_SMART_READ_VALUES) || | |
1994 | (features == ATA_SMART_READ_THRESHOLDS)) | |
88523a61 SB |
1995 | rv = 1; |
1996 | break; | |
60ec0eec AT |
1997 | case ATA_CMD_CONF_OVERLAY: |
1998 | if ((features == ATA_DCO_IDENTIFY) || | |
1999 | (features == ATA_DCO_SET)) | |
88523a61 SB |
2000 | rv = 1; |
2001 | break; | |
2002 | } | |
2003 | return rv; | |
2004 | } | |
2005 | ||
2006 | /* | |
2007 | * Executes a taskfile | |
2008 | * See ide_taskfile_ioctl() for derivation | |
2009 | */ | |
2010 | static int exec_drive_taskfile(struct driver_data *dd, | |
ef0f1587 JA |
2011 | void __user *buf, |
2012 | ide_task_request_t *req_task, | |
2013 | int outtotal) | |
88523a61 SB |
2014 | { |
2015 | struct host_to_dev_fis fis; | |
2016 | struct host_to_dev_fis *reply; | |
88523a61 SB |
2017 | u8 *outbuf = NULL; |
2018 | u8 *inbuf = NULL; | |
16d02c04 JA |
2019 | dma_addr_t outbuf_dma = 0; |
2020 | dma_addr_t inbuf_dma = 0; | |
2021 | dma_addr_t dma_buffer = 0; | |
88523a61 | 2022 | int err = 0; |
88523a61 SB |
2023 | unsigned int taskin = 0; |
2024 | unsigned int taskout = 0; | |
2025 | u8 nsect = 0; | |
88523a61 SB |
2026 | unsigned int timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS; |
2027 | unsigned int force_single_sector; | |
2028 | unsigned int transfer_size; | |
2029 | unsigned long task_file_data; | |
ef0f1587 | 2030 | int intotal = outtotal + req_task->out_size; |
88523a61 SB |
2031 | |
2032 | taskout = req_task->out_size; | |
2033 | taskin = req_task->in_size; | |
2034 | /* 130560 = 512 * 0xFF*/ | |
2035 | if (taskin > 130560 || taskout > 130560) { | |
2036 | err = -EINVAL; | |
2037 | goto abort; | |
2038 | } | |
2039 | ||
2040 | if (taskout) { | |
2041 | outbuf = kzalloc(taskout, GFP_KERNEL); | |
2042 | if (outbuf == NULL) { | |
2043 | err = -ENOMEM; | |
2044 | goto abort; | |
2045 | } | |
2046 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { | |
2047 | err = -EFAULT; | |
2048 | goto abort; | |
2049 | } | |
2050 | outbuf_dma = pci_map_single(dd->pdev, | |
2051 | outbuf, | |
2052 | taskout, | |
2053 | DMA_TO_DEVICE); | |
16d02c04 | 2054 | if (outbuf_dma == 0) { |
88523a61 SB |
2055 | err = -ENOMEM; |
2056 | goto abort; | |
2057 | } | |
2058 | dma_buffer = outbuf_dma; | |
2059 | } | |
2060 | ||
2061 | if (taskin) { | |
2062 | inbuf = kzalloc(taskin, GFP_KERNEL); | |
2063 | if (inbuf == NULL) { | |
2064 | err = -ENOMEM; | |
2065 | goto abort; | |
2066 | } | |
2067 | ||
2068 | if (copy_from_user(inbuf, buf + intotal, taskin)) { | |
2069 | err = -EFAULT; | |
2070 | goto abort; | |
2071 | } | |
2072 | inbuf_dma = pci_map_single(dd->pdev, | |
2073 | inbuf, | |
2074 | taskin, DMA_FROM_DEVICE); | |
16d02c04 | 2075 | if (inbuf_dma == 0) { |
88523a61 SB |
2076 | err = -ENOMEM; |
2077 | goto abort; | |
2078 | } | |
2079 | dma_buffer = inbuf_dma; | |
2080 | } | |
2081 | ||
2082 | /* only supports PIO and non-data commands from this ioctl. */ | |
2083 | switch (req_task->data_phase) { | |
2084 | case TASKFILE_OUT: | |
2085 | nsect = taskout / ATA_SECT_SIZE; | |
2086 | reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); | |
2087 | break; | |
2088 | case TASKFILE_IN: | |
2089 | reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); | |
2090 | break; | |
2091 | case TASKFILE_NO_DATA: | |
2092 | reply = (dd->port->rxfis + RX_FIS_D2H_REG); | |
2093 | break; | |
2094 | default: | |
2095 | err = -EINVAL; | |
2096 | goto abort; | |
2097 | } | |
2098 | ||
88523a61 SB |
2099 | /* Build the FIS. */ |
2100 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
2101 | ||
2102 | fis.type = 0x27; | |
2103 | fis.opts = 1 << 7; | |
2104 | fis.command = req_task->io_ports[7]; | |
2105 | fis.features = req_task->io_ports[1]; | |
2106 | fis.sect_count = req_task->io_ports[2]; | |
2107 | fis.lba_low = req_task->io_ports[3]; | |
2108 | fis.lba_mid = req_task->io_ports[4]; | |
2109 | fis.lba_hi = req_task->io_ports[5]; | |
2110 | /* Clear the dev bit*/ | |
2111 | fis.device = req_task->io_ports[6] & ~0x10; | |
2112 | ||
2113 | if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) { | |
2114 | req_task->in_flags.all = | |
2115 | IDE_TASKFILE_STD_IN_FLAGS | | |
2116 | (IDE_HOB_STD_IN_FLAGS << 8); | |
2117 | fis.lba_low_ex = req_task->hob_ports[3]; | |
2118 | fis.lba_mid_ex = req_task->hob_ports[4]; | |
2119 | fis.lba_hi_ex = req_task->hob_ports[5]; | |
2120 | fis.features_ex = req_task->hob_ports[1]; | |
2121 | fis.sect_cnt_ex = req_task->hob_ports[2]; | |
2122 | ||
2123 | } else { | |
2124 | req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; | |
2125 | } | |
2126 | ||
2127 | force_single_sector = implicit_sector(fis.command, fis.features); | |
2128 | ||
2129 | if ((taskin || taskout) && (!fis.sect_count)) { | |
2130 | if (nsect) | |
2131 | fis.sect_count = nsect; | |
2132 | else { | |
2133 | if (!force_single_sector) { | |
2134 | dev_warn(&dd->pdev->dev, | |
2135 | "data movement but " | |
2136 | "sect_count is 0\n"); | |
88523a61 SB |
2137 | err = -EINVAL; |
2138 | goto abort; | |
2139 | } | |
2140 | } | |
2141 | } | |
2142 | ||
2143 | dbg_printk(MTIP_DRV_NAME | |
c74b0f58 | 2144 | " %s: cmd %x, feat %x, nsect %x," |
88523a61 SB |
2145 | " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x," |
2146 | " head/dev %x\n", | |
c74b0f58 | 2147 | __func__, |
88523a61 SB |
2148 | fis.command, |
2149 | fis.features, | |
2150 | fis.sect_count, | |
2151 | fis.lba_low, | |
2152 | fis.lba_mid, | |
2153 | fis.lba_hi, | |
2154 | fis.device); | |
2155 | ||
2156 | switch (fis.command) { | |
60ec0eec | 2157 | case ATA_CMD_DOWNLOAD_MICRO: |
c74b0f58 AT |
2158 | /* Change timeout for Download Microcode to 2 minutes */ |
2159 | timeout = 120000; | |
88523a61 | 2160 | break; |
60ec0eec AT |
2161 | case ATA_CMD_SEC_ERASE_UNIT: |
2162 | /* Change timeout for Security Erase Unit to 4 minutes.*/ | |
88523a61 SB |
2163 | timeout = 240000; |
2164 | break; | |
60ec0eec AT |
2165 | case ATA_CMD_STANDBYNOW1: |
2166 | /* Change timeout for standby immediate to 10 seconds.*/ | |
88523a61 SB |
2167 | timeout = 10000; |
2168 | break; | |
60ec0eec AT |
2169 | case 0xF7: |
2170 | case 0xFA: | |
2171 | /* Change timeout for vendor unique command to 10 secs */ | |
88523a61 SB |
2172 | timeout = 10000; |
2173 | break; | |
60ec0eec | 2174 | case ATA_CMD_SMART: |
c74b0f58 AT |
2175 | /* Change timeout for vendor unique command to 15 secs */ |
2176 | timeout = 15000; | |
88523a61 SB |
2177 | break; |
2178 | default: | |
2179 | timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS; | |
2180 | break; | |
2181 | } | |
2182 | ||
2183 | /* Determine the correct transfer size.*/ | |
2184 | if (force_single_sector) | |
2185 | transfer_size = ATA_SECT_SIZE; | |
2186 | else | |
2187 | transfer_size = ATA_SECT_SIZE * fis.sect_count; | |
2188 | ||
2189 | /* Execute the command.*/ | |
2190 | if (mtip_exec_internal_command(dd->port, | |
2191 | &fis, | |
2192 | 5, | |
2193 | dma_buffer, | |
2194 | transfer_size, | |
2195 | 0, | |
2196 | GFP_KERNEL, | |
2197 | timeout) < 0) { | |
88523a61 SB |
2198 | err = -EIO; |
2199 | goto abort; | |
2200 | } | |
2201 | ||
2202 | task_file_data = readl(dd->port->mmio+PORT_TFDATA); | |
2203 | ||
2204 | if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) { | |
2205 | reply = dd->port->rxfis + RX_FIS_PIO_SETUP; | |
2206 | req_task->io_ports[7] = reply->control; | |
2207 | } else { | |
2208 | reply = dd->port->rxfis + RX_FIS_D2H_REG; | |
2209 | req_task->io_ports[7] = reply->command; | |
2210 | } | |
2211 | ||
2212 | /* reclaim the DMA buffers.*/ | |
2213 | if (inbuf_dma) | |
2214 | pci_unmap_single(dd->pdev, inbuf_dma, | |
2215 | taskin, DMA_FROM_DEVICE); | |
2216 | if (outbuf_dma) | |
2217 | pci_unmap_single(dd->pdev, outbuf_dma, | |
2218 | taskout, DMA_TO_DEVICE); | |
16d02c04 JA |
2219 | inbuf_dma = 0; |
2220 | outbuf_dma = 0; | |
88523a61 SB |
2221 | |
2222 | /* return the ATA registers to the caller.*/ | |
2223 | req_task->io_ports[1] = reply->features; | |
2224 | req_task->io_ports[2] = reply->sect_count; | |
2225 | req_task->io_ports[3] = reply->lba_low; | |
2226 | req_task->io_ports[4] = reply->lba_mid; | |
2227 | req_task->io_ports[5] = reply->lba_hi; | |
2228 | req_task->io_ports[6] = reply->device; | |
2229 | ||
2230 | if (req_task->out_flags.all & 1) { | |
2231 | ||
2232 | req_task->hob_ports[3] = reply->lba_low_ex; | |
2233 | req_task->hob_ports[4] = reply->lba_mid_ex; | |
2234 | req_task->hob_ports[5] = reply->lba_hi_ex; | |
2235 | req_task->hob_ports[1] = reply->features_ex; | |
2236 | req_task->hob_ports[2] = reply->sect_cnt_ex; | |
2237 | } | |
88523a61 | 2238 | dbg_printk(MTIP_DRV_NAME |
c74b0f58 | 2239 | " %s: Completion: stat %x," |
88523a61 SB |
2240 | "err %x, sect_cnt %x, lbalo %x," |
2241 | "lbamid %x, lbahi %x, dev %x\n", | |
2242 | __func__, | |
2243 | req_task->io_ports[7], | |
2244 | req_task->io_ports[1], | |
2245 | req_task->io_ports[2], | |
2246 | req_task->io_ports[3], | |
2247 | req_task->io_ports[4], | |
2248 | req_task->io_ports[5], | |
2249 | req_task->io_ports[6]); | |
2250 | ||
88523a61 SB |
2251 | if (taskout) { |
2252 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { | |
2253 | err = -EFAULT; | |
2254 | goto abort; | |
2255 | } | |
2256 | } | |
2257 | if (taskin) { | |
2258 | if (copy_to_user(buf + intotal, inbuf, taskin)) { | |
2259 | err = -EFAULT; | |
2260 | goto abort; | |
2261 | } | |
2262 | } | |
2263 | abort: | |
2264 | if (inbuf_dma) | |
2265 | pci_unmap_single(dd->pdev, inbuf_dma, | |
2266 | taskin, DMA_FROM_DEVICE); | |
2267 | if (outbuf_dma) | |
2268 | pci_unmap_single(dd->pdev, outbuf_dma, | |
2269 | taskout, DMA_TO_DEVICE); | |
88523a61 SB |
2270 | kfree(outbuf); |
2271 | kfree(inbuf); | |
2272 | ||
2273 | return err; | |
2274 | } | |
2275 | ||
2276 | /* | |
2277 | * Handle IOCTL calls from the Block Layer. | |
2278 | * | |
2279 | * This function is called by the Block Layer when it receives an IOCTL | |
2280 | * command that it does not understand. If the IOCTL command is not supported | |
2281 | * this function returns -ENOTTY. | |
2282 | * | |
2283 | * @dd Pointer to the driver data structure. | |
2284 | * @cmd IOCTL command passed from the Block Layer. | |
2285 | * @arg IOCTL argument passed from the Block Layer. | |
2286 | * | |
2287 | * return value | |
2288 | * 0 The IOCTL completed successfully. | |
2289 | * -ENOTTY The specified command is not supported. | |
2290 | * -EFAULT An error occurred copying data to a user space buffer. | |
2291 | * -EIO An error occurred while executing the command. | |
2292 | */ | |
ef0f1587 JA |
2293 | static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd, |
2294 | unsigned long arg) | |
88523a61 SB |
2295 | { |
2296 | switch (cmd) { | |
2297 | case HDIO_GET_IDENTITY: | |
2298 | if (mtip_get_identify(dd->port, (void __user *) arg) < 0) { | |
2299 | dev_warn(&dd->pdev->dev, | |
2300 | "Unable to read identity\n"); | |
2301 | return -EIO; | |
2302 | } | |
2303 | ||
2304 | break; | |
2305 | case HDIO_DRIVE_CMD: | |
2306 | { | |
2307 | u8 drive_command[4]; | |
2308 | ||
2309 | /* Copy the user command info to our buffer. */ | |
2310 | if (copy_from_user(drive_command, | |
2311 | (void __user *) arg, | |
2312 | sizeof(drive_command))) | |
2313 | return -EFAULT; | |
2314 | ||
2315 | /* Execute the drive command. */ | |
2316 | if (exec_drive_command(dd->port, | |
2317 | drive_command, | |
2318 | (void __user *) (arg+4))) | |
2319 | return -EIO; | |
2320 | ||
2321 | /* Copy the status back to the users buffer. */ | |
2322 | if (copy_to_user((void __user *) arg, | |
2323 | drive_command, | |
2324 | sizeof(drive_command))) | |
2325 | return -EFAULT; | |
2326 | ||
2327 | break; | |
2328 | } | |
2329 | case HDIO_DRIVE_TASK: | |
2330 | { | |
2331 | u8 drive_command[7]; | |
2332 | ||
2333 | /* Copy the user command info to our buffer. */ | |
2334 | if (copy_from_user(drive_command, | |
2335 | (void __user *) arg, | |
2336 | sizeof(drive_command))) | |
2337 | return -EFAULT; | |
2338 | ||
2339 | /* Execute the drive command. */ | |
2340 | if (exec_drive_task(dd->port, drive_command)) | |
2341 | return -EIO; | |
2342 | ||
2343 | /* Copy the status back to the users buffer. */ | |
2344 | if (copy_to_user((void __user *) arg, | |
2345 | drive_command, | |
2346 | sizeof(drive_command))) | |
2347 | return -EFAULT; | |
2348 | ||
2349 | break; | |
2350 | } | |
ef0f1587 JA |
2351 | case HDIO_DRIVE_TASKFILE: { |
2352 | ide_task_request_t req_task; | |
2353 | int ret, outtotal; | |
2354 | ||
2355 | if (copy_from_user(&req_task, (void __user *) arg, | |
2356 | sizeof(req_task))) | |
2357 | return -EFAULT; | |
2358 | ||
2359 | outtotal = sizeof(req_task); | |
2360 | ||
2361 | ret = exec_drive_taskfile(dd, (void __user *) arg, | |
2362 | &req_task, outtotal); | |
2363 | ||
60ec0eec AT |
2364 | if (copy_to_user((void __user *) arg, &req_task, |
2365 | sizeof(req_task))) | |
ef0f1587 JA |
2366 | return -EFAULT; |
2367 | ||
2368 | return ret; | |
2369 | } | |
88523a61 SB |
2370 | |
2371 | default: | |
2372 | return -EINVAL; | |
2373 | } | |
2374 | return 0; | |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * Submit an IO to the hw | |
2379 | * | |
2380 | * This function is called by the block layer to issue an io | |
2381 | * to the device. Upon completion, the callback function will | |
2382 | * be called with the data parameter passed as the callback data. | |
2383 | * | |
2384 | * @dd Pointer to the driver data structure. | |
2385 | * @start First sector to read. | |
2386 | * @nsect Number of sectors to read. | |
2387 | * @nents Number of entries in scatter list for the read command. | |
2388 | * @tag The tag of this read command. | |
2389 | * @callback Pointer to the function that should be called | |
2390 | * when the read completes. | |
2391 | * @data Callback data passed to the callback function | |
2392 | * when the read completes. | |
88523a61 SB |
2393 | * @dir Direction (read or write) |
2394 | * | |
2395 | * return value | |
2396 | * None | |
2397 | */ | |
6316668f JA |
2398 | static void mtip_hw_submit_io(struct driver_data *dd, sector_t start, |
2399 | int nsect, int nents, int tag, void *callback, | |
4e8670e2 | 2400 | void *data, int dir) |
88523a61 SB |
2401 | { |
2402 | struct host_to_dev_fis *fis; | |
2403 | struct mtip_port *port = dd->port; | |
2404 | struct mtip_cmd *command = &port->commands[tag]; | |
45038367 | 2405 | int dma_dir = (dir == READ) ? DMA_FROM_DEVICE : DMA_TO_DEVICE; |
88523a61 SB |
2406 | |
2407 | /* Map the scatter list for DMA access */ | |
45038367 | 2408 | nents = dma_map_sg(&dd->pdev->dev, command->sg, nents, dma_dir); |
88523a61 SB |
2409 | |
2410 | command->scatter_ents = nents; | |
2411 | ||
2412 | /* | |
2413 | * The number of retries for this command before it is | |
2414 | * reported as a failure to the upper layers. | |
2415 | */ | |
2416 | command->retries = MTIP_MAX_RETRIES; | |
2417 | ||
2418 | /* Fill out fis */ | |
2419 | fis = command->command; | |
2420 | fis->type = 0x27; | |
2421 | fis->opts = 1 << 7; | |
2422 | fis->command = | |
2423 | (dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE); | |
60ec0eec AT |
2424 | *((unsigned int *) &fis->lba_low) = (start & 0xFFFFFF); |
2425 | *((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xFFFFFF); | |
88523a61 | 2426 | fis->device = 1 << 6; |
60ec0eec AT |
2427 | fis->features = nsect & 0xFF; |
2428 | fis->features_ex = (nsect >> 8) & 0xFF; | |
88523a61 SB |
2429 | fis->sect_count = ((tag << 3) | (tag >> 5)); |
2430 | fis->sect_cnt_ex = 0; | |
2431 | fis->control = 0; | |
2432 | fis->res2 = 0; | |
2433 | fis->res3 = 0; | |
2434 | fill_command_sg(dd, command, nents); | |
2435 | ||
2436 | /* Populate the command header */ | |
60ec0eec AT |
2437 | command->command_header->opts = |
2438 | __force_bit2int cpu_to_le32( | |
2439 | (nents << 16) | 5 | AHCI_CMD_PREFETCH); | |
88523a61 SB |
2440 | command->command_header->byte_count = 0; |
2441 | ||
2442 | /* | |
2443 | * Set the completion function and data for the command | |
2444 | * within this layer. | |
2445 | */ | |
2446 | command->comp_data = dd; | |
2447 | command->comp_func = mtip_async_complete; | |
45038367 | 2448 | command->direction = dma_dir; |
88523a61 SB |
2449 | |
2450 | /* | |
2451 | * Set the completion function and data for the command passed | |
2452 | * from the upper layer. | |
2453 | */ | |
2454 | command->async_data = data; | |
2455 | command->async_callback = callback; | |
2456 | ||
2457 | /* | |
60ec0eec AT |
2458 | * To prevent this command from being issued |
2459 | * if an internal command is in progress or error handling is active. | |
88523a61 | 2460 | */ |
c74b0f58 | 2461 | if (port->flags & MTIP_PF_PAUSE_IO) { |
60ec0eec | 2462 | set_bit(tag, port->cmds_to_issue); |
8a857a88 | 2463 | set_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); |
60ec0eec AT |
2464 | return; |
2465 | } | |
88523a61 SB |
2466 | |
2467 | /* Issue the command to the hardware */ | |
2468 | mtip_issue_ncq_command(port, tag); | |
2469 | ||
dad40f16 | 2470 | return; |
88523a61 SB |
2471 | } |
2472 | ||
2473 | /* | |
2474 | * Release a command slot. | |
2475 | * | |
2476 | * @dd Pointer to the driver data structure. | |
2477 | * @tag Slot tag | |
2478 | * | |
2479 | * return value | |
2480 | * None | |
2481 | */ | |
6316668f | 2482 | static void mtip_hw_release_scatterlist(struct driver_data *dd, int tag) |
88523a61 SB |
2483 | { |
2484 | release_slot(dd->port, tag); | |
2485 | } | |
2486 | ||
2487 | /* | |
2488 | * Obtain a command slot and return its associated scatter list. | |
2489 | * | |
2490 | * @dd Pointer to the driver data structure. | |
2491 | * @tag Pointer to an int that will receive the allocated command | |
2492 | * slot tag. | |
2493 | * | |
2494 | * return value | |
2495 | * Pointer to the scatter list for the allocated command slot | |
2496 | * or NULL if no command slots are available. | |
2497 | */ | |
6316668f JA |
2498 | static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd, |
2499 | int *tag) | |
88523a61 SB |
2500 | { |
2501 | /* | |
2502 | * It is possible that, even with this semaphore, a thread | |
2503 | * may think that no command slots are available. Therefore, we | |
2504 | * need to make an attempt to get_slot(). | |
2505 | */ | |
2506 | down(&dd->port->cmd_slot); | |
2507 | *tag = get_slot(dd->port); | |
2508 | ||
8a857a88 | 2509 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) { |
45038367 AT |
2510 | up(&dd->port->cmd_slot); |
2511 | return NULL; | |
2512 | } | |
88523a61 SB |
2513 | if (unlikely(*tag < 0)) |
2514 | return NULL; | |
2515 | ||
2516 | return dd->port->commands[*tag].sg; | |
2517 | } | |
2518 | ||
2519 | /* | |
2520 | * Sysfs register/status dump. | |
2521 | * | |
2522 | * @dev Pointer to the device structure, passed by the kernrel. | |
2523 | * @attr Pointer to the device_attribute structure passed by the kernel. | |
2524 | * @buf Pointer to the char buffer that will receive the stats info. | |
2525 | * | |
2526 | * return value | |
2527 | * The size, in bytes, of the data copied into buf. | |
2528 | */ | |
45038367 | 2529 | static ssize_t mtip_hw_show_registers(struct device *dev, |
88523a61 SB |
2530 | struct device_attribute *attr, |
2531 | char *buf) | |
2532 | { | |
2533 | u32 group_allocated; | |
2534 | struct driver_data *dd = dev_to_disk(dev)->private_data; | |
2535 | int size = 0; | |
2536 | int n; | |
2537 | ||
f6587217 | 2538 | size += sprintf(&buf[size], "S ACTive:\n"); |
88523a61 SB |
2539 | |
2540 | for (n = 0; n < dd->slot_groups; n++) | |
2541 | size += sprintf(&buf[size], "0x%08x\n", | |
2542 | readl(dd->port->s_active[n])); | |
2543 | ||
2544 | size += sprintf(&buf[size], "Command Issue:\n"); | |
2545 | ||
2546 | for (n = 0; n < dd->slot_groups; n++) | |
2547 | size += sprintf(&buf[size], "0x%08x\n", | |
2548 | readl(dd->port->cmd_issue[n])); | |
2549 | ||
2550 | size += sprintf(&buf[size], "Allocated:\n"); | |
2551 | ||
2552 | for (n = 0; n < dd->slot_groups; n++) { | |
2553 | if (sizeof(long) > sizeof(u32)) | |
2554 | group_allocated = | |
2555 | dd->port->allocated[n/2] >> (32*(n&1)); | |
2556 | else | |
2557 | group_allocated = dd->port->allocated[n]; | |
2558 | size += sprintf(&buf[size], "0x%08x\n", | |
2559 | group_allocated); | |
2560 | } | |
2561 | ||
f6587217 | 2562 | size += sprintf(&buf[size], "Completed:\n"); |
88523a61 SB |
2563 | |
2564 | for (n = 0; n < dd->slot_groups; n++) | |
2565 | size += sprintf(&buf[size], "0x%08x\n", | |
2566 | readl(dd->port->completed[n])); | |
2567 | ||
f6587217 | 2568 | size += sprintf(&buf[size], "PORT IRQ STAT : 0x%08x\n", |
88523a61 | 2569 | readl(dd->port->mmio + PORT_IRQ_STAT)); |
f6587217 | 2570 | size += sprintf(&buf[size], "HOST IRQ STAT : 0x%08x\n", |
88523a61 SB |
2571 | readl(dd->mmio + HOST_IRQ_STAT)); |
2572 | ||
2573 | return size; | |
2574 | } | |
f6587217 AT |
2575 | |
2576 | static ssize_t mtip_hw_show_status(struct device *dev, | |
2577 | struct device_attribute *attr, | |
2578 | char *buf) | |
2579 | { | |
2580 | struct driver_data *dd = dev_to_disk(dev)->private_data; | |
2581 | int size = 0; | |
2582 | ||
8a857a88 | 2583 | if (test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag)) |
f6587217 | 2584 | size += sprintf(buf, "%s", "thermal_shutdown\n"); |
8a857a88 | 2585 | else if (test_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag)) |
f6587217 AT |
2586 | size += sprintf(buf, "%s", "write_protect\n"); |
2587 | else | |
2588 | size += sprintf(buf, "%s", "online\n"); | |
2589 | ||
2590 | return size; | |
2591 | } | |
2592 | ||
45038367 | 2593 | static DEVICE_ATTR(registers, S_IRUGO, mtip_hw_show_registers, NULL); |
f6587217 | 2594 | static DEVICE_ATTR(status, S_IRUGO, mtip_hw_show_status, NULL); |
88523a61 SB |
2595 | |
2596 | /* | |
2597 | * Create the sysfs related attributes. | |
2598 | * | |
2599 | * @dd Pointer to the driver data structure. | |
2600 | * @kobj Pointer to the kobj for the block device. | |
2601 | * | |
2602 | * return value | |
2603 | * 0 Operation completed successfully. | |
2604 | * -EINVAL Invalid parameter. | |
2605 | */ | |
6316668f | 2606 | static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj) |
88523a61 SB |
2607 | { |
2608 | if (!kobj || !dd) | |
2609 | return -EINVAL; | |
2610 | ||
2611 | if (sysfs_create_file(kobj, &dev_attr_registers.attr)) | |
2612 | dev_warn(&dd->pdev->dev, | |
f6587217 AT |
2613 | "Error creating 'registers' sysfs entry\n"); |
2614 | if (sysfs_create_file(kobj, &dev_attr_status.attr)) | |
2615 | dev_warn(&dd->pdev->dev, | |
2616 | "Error creating 'status' sysfs entry\n"); | |
88523a61 SB |
2617 | return 0; |
2618 | } | |
2619 | ||
2620 | /* | |
2621 | * Remove the sysfs related attributes. | |
2622 | * | |
2623 | * @dd Pointer to the driver data structure. | |
2624 | * @kobj Pointer to the kobj for the block device. | |
2625 | * | |
2626 | * return value | |
2627 | * 0 Operation completed successfully. | |
2628 | * -EINVAL Invalid parameter. | |
2629 | */ | |
6316668f | 2630 | static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj) |
88523a61 SB |
2631 | { |
2632 | if (!kobj || !dd) | |
2633 | return -EINVAL; | |
2634 | ||
2635 | sysfs_remove_file(kobj, &dev_attr_registers.attr); | |
f6587217 | 2636 | sysfs_remove_file(kobj, &dev_attr_status.attr); |
88523a61 SB |
2637 | |
2638 | return 0; | |
2639 | } | |
2640 | ||
2641 | /* | |
2642 | * Perform any init/resume time hardware setup | |
2643 | * | |
2644 | * @dd Pointer to the driver data structure. | |
2645 | * | |
2646 | * return value | |
2647 | * None | |
2648 | */ | |
2649 | static inline void hba_setup(struct driver_data *dd) | |
2650 | { | |
2651 | u32 hwdata; | |
2652 | hwdata = readl(dd->mmio + HOST_HSORG); | |
2653 | ||
2654 | /* interrupt bug workaround: use only 1 IS bit.*/ | |
2655 | writel(hwdata | | |
2656 | HSORG_DISABLE_SLOTGRP_INTR | | |
2657 | HSORG_DISABLE_SLOTGRP_PXIS, | |
2658 | dd->mmio + HOST_HSORG); | |
2659 | } | |
2660 | ||
2661 | /* | |
2662 | * Detect the details of the product, and store anything needed | |
2663 | * into the driver data structure. This includes product type and | |
2664 | * version and number of slot groups. | |
2665 | * | |
2666 | * @dd Pointer to the driver data structure. | |
2667 | * | |
2668 | * return value | |
2669 | * None | |
2670 | */ | |
2671 | static void mtip_detect_product(struct driver_data *dd) | |
2672 | { | |
2673 | u32 hwdata; | |
2674 | unsigned int rev, slotgroups; | |
2675 | ||
2676 | /* | |
2677 | * HBA base + 0xFC [15:0] - vendor-specific hardware interface | |
2678 | * info register: | |
2679 | * [15:8] hardware/software interface rev# | |
2680 | * [ 3] asic-style interface | |
2681 | * [ 2:0] number of slot groups, minus 1 (only valid for asic-style). | |
2682 | */ | |
2683 | hwdata = readl(dd->mmio + HOST_HSORG); | |
2684 | ||
2685 | dd->product_type = MTIP_PRODUCT_UNKNOWN; | |
2686 | dd->slot_groups = 1; | |
2687 | ||
2688 | if (hwdata & 0x8) { | |
2689 | dd->product_type = MTIP_PRODUCT_ASICFPGA; | |
2690 | rev = (hwdata & HSORG_HWREV) >> 8; | |
2691 | slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1; | |
2692 | dev_info(&dd->pdev->dev, | |
2693 | "ASIC-FPGA design, HS rev 0x%x, " | |
2694 | "%i slot groups [%i slots]\n", | |
2695 | rev, | |
2696 | slotgroups, | |
2697 | slotgroups * 32); | |
2698 | ||
2699 | if (slotgroups > MTIP_MAX_SLOT_GROUPS) { | |
2700 | dev_warn(&dd->pdev->dev, | |
2701 | "Warning: driver only supports " | |
2702 | "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS); | |
2703 | slotgroups = MTIP_MAX_SLOT_GROUPS; | |
2704 | } | |
2705 | dd->slot_groups = slotgroups; | |
2706 | return; | |
2707 | } | |
2708 | ||
2709 | dev_warn(&dd->pdev->dev, "Unrecognized product id\n"); | |
2710 | } | |
2711 | ||
2712 | /* | |
2713 | * Blocking wait for FTL rebuild to complete | |
2714 | * | |
2715 | * @dd Pointer to the DRIVER_DATA structure. | |
2716 | * | |
2717 | * return value | |
2718 | * 0 FTL rebuild completed successfully | |
2719 | * -EFAULT FTL rebuild error/timeout/interruption | |
2720 | */ | |
2721 | static int mtip_ftl_rebuild_poll(struct driver_data *dd) | |
2722 | { | |
2723 | unsigned long timeout, cnt = 0, start; | |
2724 | ||
2725 | dev_warn(&dd->pdev->dev, | |
2726 | "FTL rebuild in progress. Polling for completion.\n"); | |
2727 | ||
2728 | start = jiffies; | |
88523a61 SB |
2729 | timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS); |
2730 | ||
2731 | do { | |
8a857a88 | 2732 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
45038367 AT |
2733 | &dd->dd_flag))) |
2734 | return -EFAULT; | |
88523a61 SB |
2735 | if (mtip_check_surprise_removal(dd->pdev)) |
2736 | return -EFAULT; | |
60ec0eec | 2737 | |
88523a61 SB |
2738 | if (mtip_get_identify(dd->port, NULL) < 0) |
2739 | return -EFAULT; | |
2740 | ||
2741 | if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == | |
2742 | MTIP_FTL_REBUILD_MAGIC) { | |
2743 | ssleep(1); | |
2744 | /* Print message every 3 minutes */ | |
2745 | if (cnt++ >= 180) { | |
2746 | dev_warn(&dd->pdev->dev, | |
2747 | "FTL rebuild in progress (%d secs).\n", | |
2748 | jiffies_to_msecs(jiffies - start) / 1000); | |
2749 | cnt = 0; | |
2750 | } | |
2751 | } else { | |
2752 | dev_warn(&dd->pdev->dev, | |
2753 | "FTL rebuild complete (%d secs).\n", | |
2754 | jiffies_to_msecs(jiffies - start) / 1000); | |
62ee8c13 | 2755 | mtip_block_initialize(dd); |
45038367 | 2756 | return 0; |
88523a61 SB |
2757 | } |
2758 | ssleep(10); | |
2759 | } while (time_before(jiffies, timeout)); | |
2760 | ||
2761 | /* Check for timeout */ | |
45038367 | 2762 | dev_err(&dd->pdev->dev, |
88523a61 SB |
2763 | "Timed out waiting for FTL rebuild to complete (%d secs).\n", |
2764 | jiffies_to_msecs(jiffies - start) / 1000); | |
45038367 | 2765 | return -EFAULT; |
88523a61 SB |
2766 | } |
2767 | ||
60ec0eec AT |
2768 | /* |
2769 | * service thread to issue queued commands | |
2770 | * | |
2771 | * @data Pointer to the driver data structure. | |
2772 | * | |
2773 | * return value | |
2774 | * 0 | |
2775 | */ | |
2776 | ||
2777 | static int mtip_service_thread(void *data) | |
2778 | { | |
2779 | struct driver_data *dd = (struct driver_data *)data; | |
2780 | unsigned long slot, slot_start, slot_wrap; | |
2781 | unsigned int num_cmd_slots = dd->slot_groups * 32; | |
2782 | struct mtip_port *port = dd->port; | |
2783 | ||
2784 | while (1) { | |
2785 | /* | |
2786 | * the condition is to check neither an internal command is | |
2787 | * is in progress nor error handling is active | |
2788 | */ | |
2789 | wait_event_interruptible(port->svc_wait, (port->flags) && | |
c74b0f58 | 2790 | !(port->flags & MTIP_PF_PAUSE_IO)); |
60ec0eec AT |
2791 | |
2792 | if (kthread_should_stop()) | |
2793 | break; | |
2794 | ||
8a857a88 | 2795 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, |
45038367 AT |
2796 | &dd->dd_flag))) |
2797 | break; | |
c74b0f58 | 2798 | |
8a857a88 AT |
2799 | set_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); |
2800 | if (test_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags)) { | |
60ec0eec AT |
2801 | slot = 1; |
2802 | /* used to restrict the loop to one iteration */ | |
2803 | slot_start = num_cmd_slots; | |
2804 | slot_wrap = 0; | |
2805 | while (1) { | |
2806 | slot = find_next_bit(port->cmds_to_issue, | |
2807 | num_cmd_slots, slot); | |
2808 | if (slot_wrap == 1) { | |
2809 | if ((slot_start >= slot) || | |
2810 | (slot >= num_cmd_slots)) | |
2811 | break; | |
2812 | } | |
2813 | if (unlikely(slot_start == num_cmd_slots)) | |
2814 | slot_start = slot; | |
2815 | ||
2816 | if (unlikely(slot == num_cmd_slots)) { | |
2817 | slot = 1; | |
2818 | slot_wrap = 1; | |
2819 | continue; | |
2820 | } | |
2821 | ||
2822 | /* Issue the command to the hardware */ | |
2823 | mtip_issue_ncq_command(port, slot); | |
2824 | ||
60ec0eec AT |
2825 | clear_bit(slot, port->cmds_to_issue); |
2826 | } | |
2827 | ||
8a857a88 AT |
2828 | clear_bit(MTIP_PF_ISSUE_CMDS_BIT, &port->flags); |
2829 | } else if (test_bit(MTIP_PF_REBUILD_BIT, &port->flags)) { | |
8182b495 | 2830 | if (!mtip_ftl_rebuild_poll(dd)) |
8a857a88 | 2831 | set_bit(MTIP_DDF_REBUILD_FAILED_BIT, |
8182b495 | 2832 | &dd->dd_flag); |
8a857a88 | 2833 | clear_bit(MTIP_PF_REBUILD_BIT, &port->flags); |
60ec0eec | 2834 | } |
8a857a88 | 2835 | clear_bit(MTIP_PF_SVC_THD_ACTIVE_BIT, &port->flags); |
62ee8c13 | 2836 | |
c74b0f58 | 2837 | if (test_bit(MTIP_PF_SVC_THD_STOP_BIT, &port->flags)) |
62ee8c13 | 2838 | break; |
60ec0eec AT |
2839 | } |
2840 | return 0; | |
2841 | } | |
2842 | ||
88523a61 SB |
2843 | /* |
2844 | * Called once for each card. | |
2845 | * | |
2846 | * @dd Pointer to the driver data structure. | |
2847 | * | |
2848 | * return value | |
2849 | * 0 on success, else an error code. | |
2850 | */ | |
6316668f | 2851 | static int mtip_hw_init(struct driver_data *dd) |
88523a61 SB |
2852 | { |
2853 | int i; | |
2854 | int rv; | |
2855 | unsigned int num_command_slots; | |
45038367 | 2856 | unsigned long timeout, timetaken; |
f6587217 AT |
2857 | unsigned char *buf; |
2858 | struct smart_attr attr242; | |
88523a61 SB |
2859 | |
2860 | dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR]; | |
2861 | ||
2862 | mtip_detect_product(dd); | |
2863 | if (dd->product_type == MTIP_PRODUCT_UNKNOWN) { | |
2864 | rv = -EIO; | |
2865 | goto out1; | |
2866 | } | |
2867 | num_command_slots = dd->slot_groups * 32; | |
2868 | ||
2869 | hba_setup(dd); | |
2870 | ||
88523a61 SB |
2871 | tasklet_init(&dd->tasklet, mtip_tasklet, (unsigned long)dd); |
2872 | ||
2873 | dd->port = kzalloc(sizeof(struct mtip_port), GFP_KERNEL); | |
2874 | if (!dd->port) { | |
2875 | dev_err(&dd->pdev->dev, | |
2876 | "Memory allocation: port structure\n"); | |
2877 | return -ENOMEM; | |
2878 | } | |
2879 | ||
2880 | /* Counting semaphore to track command slot usage */ | |
2881 | sema_init(&dd->port->cmd_slot, num_command_slots - 1); | |
2882 | ||
2883 | /* Spinlock to prevent concurrent issue */ | |
2884 | spin_lock_init(&dd->port->cmd_issue_lock); | |
2885 | ||
2886 | /* Set the port mmio base address. */ | |
2887 | dd->port->mmio = dd->mmio + PORT_OFFSET; | |
2888 | dd->port->dd = dd; | |
2889 | ||
2890 | /* Allocate memory for the command list. */ | |
2891 | dd->port->command_list = | |
2892 | dmam_alloc_coherent(&dd->pdev->dev, | |
f6587217 | 2893 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
88523a61 SB |
2894 | &dd->port->command_list_dma, |
2895 | GFP_KERNEL); | |
2896 | if (!dd->port->command_list) { | |
2897 | dev_err(&dd->pdev->dev, | |
2898 | "Memory allocation: command list\n"); | |
2899 | rv = -ENOMEM; | |
2900 | goto out1; | |
2901 | } | |
2902 | ||
2903 | /* Clear the memory we have allocated. */ | |
2904 | memset(dd->port->command_list, | |
2905 | 0, | |
f6587217 | 2906 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4)); |
88523a61 SB |
2907 | |
2908 | /* Setup the addresse of the RX FIS. */ | |
2909 | dd->port->rxfis = dd->port->command_list + HW_CMD_SLOT_SZ; | |
2910 | dd->port->rxfis_dma = dd->port->command_list_dma + HW_CMD_SLOT_SZ; | |
2911 | ||
2912 | /* Setup the address of the command tables. */ | |
2913 | dd->port->command_table = dd->port->rxfis + AHCI_RX_FIS_SZ; | |
2914 | dd->port->command_tbl_dma = dd->port->rxfis_dma + AHCI_RX_FIS_SZ; | |
2915 | ||
2916 | /* Setup the address of the identify data. */ | |
2917 | dd->port->identify = dd->port->command_table + | |
2918 | HW_CMD_TBL_AR_SZ; | |
2919 | dd->port->identify_dma = dd->port->command_tbl_dma + | |
2920 | HW_CMD_TBL_AR_SZ; | |
2921 | ||
f6587217 | 2922 | /* Setup the address of the sector buffer - for some non-ncq cmds */ |
88523a61 SB |
2923 | dd->port->sector_buffer = (void *) dd->port->identify + ATA_SECT_SIZE; |
2924 | dd->port->sector_buffer_dma = dd->port->identify_dma + ATA_SECT_SIZE; | |
2925 | ||
f6587217 AT |
2926 | /* Setup the address of the log buf - for read log command */ |
2927 | dd->port->log_buf = (void *)dd->port->sector_buffer + ATA_SECT_SIZE; | |
2928 | dd->port->log_buf_dma = dd->port->sector_buffer_dma + ATA_SECT_SIZE; | |
2929 | ||
2930 | /* Setup the address of the smart buf - for smart read data command */ | |
2931 | dd->port->smart_buf = (void *)dd->port->log_buf + ATA_SECT_SIZE; | |
2932 | dd->port->smart_buf_dma = dd->port->log_buf_dma + ATA_SECT_SIZE; | |
2933 | ||
2934 | ||
88523a61 SB |
2935 | /* Point the command headers at the command tables. */ |
2936 | for (i = 0; i < num_command_slots; i++) { | |
2937 | dd->port->commands[i].command_header = | |
2938 | dd->port->command_list + | |
2939 | (sizeof(struct mtip_cmd_hdr) * i); | |
2940 | dd->port->commands[i].command_header_dma = | |
2941 | dd->port->command_list_dma + | |
2942 | (sizeof(struct mtip_cmd_hdr) * i); | |
2943 | ||
2944 | dd->port->commands[i].command = | |
2945 | dd->port->command_table + (HW_CMD_TBL_SZ * i); | |
2946 | dd->port->commands[i].command_dma = | |
2947 | dd->port->command_tbl_dma + (HW_CMD_TBL_SZ * i); | |
2948 | ||
2949 | if (readl(dd->mmio + HOST_CAP) & HOST_CAP_64) | |
2950 | dd->port->commands[i].command_header->ctbau = | |
60ec0eec | 2951 | __force_bit2int cpu_to_le32( |
88523a61 | 2952 | (dd->port->commands[i].command_dma >> 16) >> 16); |
60ec0eec AT |
2953 | dd->port->commands[i].command_header->ctba = |
2954 | __force_bit2int cpu_to_le32( | |
2955 | dd->port->commands[i].command_dma & 0xFFFFFFFF); | |
88523a61 SB |
2956 | |
2957 | /* | |
2958 | * If this is not done, a bug is reported by the stock | |
2959 | * FC11 i386. Due to the fact that it has lots of kernel | |
2960 | * debugging enabled. | |
2961 | */ | |
2962 | sg_init_table(dd->port->commands[i].sg, MTIP_MAX_SG); | |
2963 | ||
2964 | /* Mark all commands as currently inactive.*/ | |
2965 | atomic_set(&dd->port->commands[i].active, 0); | |
2966 | } | |
2967 | ||
2968 | /* Setup the pointers to the extended s_active and CI registers. */ | |
2969 | for (i = 0; i < dd->slot_groups; i++) { | |
2970 | dd->port->s_active[i] = | |
2971 | dd->port->mmio + i*0x80 + PORT_SCR_ACT; | |
2972 | dd->port->cmd_issue[i] = | |
2973 | dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE; | |
2974 | dd->port->completed[i] = | |
2975 | dd->port->mmio + i*0x80 + PORT_SDBV; | |
2976 | } | |
2977 | ||
45038367 AT |
2978 | timetaken = jiffies; |
2979 | timeout = jiffies + msecs_to_jiffies(30000); | |
2980 | while (((readl(dd->port->mmio + PORT_SCR_STAT) & 0x0F) != 0x03) && | |
2981 | time_before(jiffies, timeout)) { | |
2982 | mdelay(100); | |
2983 | } | |
2984 | if (unlikely(mtip_check_surprise_removal(dd->pdev))) { | |
2985 | timetaken = jiffies - timetaken; | |
2986 | dev_warn(&dd->pdev->dev, | |
2987 | "Surprise removal detected at %u ms\n", | |
2988 | jiffies_to_msecs(timetaken)); | |
2989 | rv = -ENODEV; | |
2990 | goto out2 ; | |
2991 | } | |
8a857a88 | 2992 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) { |
45038367 AT |
2993 | timetaken = jiffies - timetaken; |
2994 | dev_warn(&dd->pdev->dev, | |
2995 | "Removal detected at %u ms\n", | |
2996 | jiffies_to_msecs(timetaken)); | |
2997 | rv = -EFAULT; | |
88523a61 SB |
2998 | goto out2; |
2999 | } | |
3000 | ||
45038367 AT |
3001 | /* Conditionally reset the HBA. */ |
3002 | if (!(readl(dd->mmio + HOST_CAP) & HOST_CAP_NZDMA)) { | |
3003 | if (mtip_hba_reset(dd) < 0) { | |
3004 | dev_err(&dd->pdev->dev, | |
3005 | "Card did not reset within timeout\n"); | |
3006 | rv = -EIO; | |
3007 | goto out2; | |
3008 | } | |
3009 | } else { | |
3010 | /* Clear any pending interrupts on the HBA */ | |
3011 | writel(readl(dd->mmio + HOST_IRQ_STAT), | |
3012 | dd->mmio + HOST_IRQ_STAT); | |
3013 | } | |
3014 | ||
88523a61 SB |
3015 | mtip_init_port(dd->port); |
3016 | mtip_start_port(dd->port); | |
3017 | ||
3018 | /* Setup the ISR and enable interrupts. */ | |
3019 | rv = devm_request_irq(&dd->pdev->dev, | |
3020 | dd->pdev->irq, | |
3021 | mtip_irq_handler, | |
3022 | IRQF_SHARED, | |
3023 | dev_driver_string(&dd->pdev->dev), | |
3024 | dd); | |
3025 | ||
3026 | if (rv) { | |
3027 | dev_err(&dd->pdev->dev, | |
3028 | "Unable to allocate IRQ %d\n", dd->pdev->irq); | |
3029 | goto out2; | |
3030 | } | |
3031 | ||
3032 | /* Enable interrupts on the HBA. */ | |
3033 | writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, | |
3034 | dd->mmio + HOST_CTL); | |
3035 | ||
3036 | init_timer(&dd->port->cmd_timer); | |
60ec0eec AT |
3037 | init_waitqueue_head(&dd->port->svc_wait); |
3038 | ||
88523a61 SB |
3039 | dd->port->cmd_timer.data = (unsigned long int) dd->port; |
3040 | dd->port->cmd_timer.function = mtip_timeout_function; | |
3041 | mod_timer(&dd->port->cmd_timer, | |
3042 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); | |
3043 | ||
45038367 | 3044 | |
8a857a88 | 3045 | if (test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag)) { |
45038367 AT |
3046 | rv = -EFAULT; |
3047 | goto out3; | |
3048 | } | |
3049 | ||
88523a61 SB |
3050 | if (mtip_get_identify(dd->port, NULL) < 0) { |
3051 | rv = -EFAULT; | |
3052 | goto out3; | |
3053 | } | |
88523a61 SB |
3054 | |
3055 | if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == | |
3056 | MTIP_FTL_REBUILD_MAGIC) { | |
8a857a88 | 3057 | set_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags); |
62ee8c13 | 3058 | return MTIP_FTL_REBUILD_MAGIC; |
88523a61 | 3059 | } |
62ee8c13 | 3060 | mtip_dump_identify(dd->port); |
f6587217 AT |
3061 | |
3062 | /* check write protect, over temp and rebuild statuses */ | |
3063 | rv = mtip_read_log_page(dd->port, ATA_LOG_SATA_NCQ, | |
3064 | dd->port->log_buf, | |
3065 | dd->port->log_buf_dma, 1); | |
3066 | if (rv) { | |
3067 | dev_warn(&dd->pdev->dev, | |
3068 | "Error in READ LOG EXT (10h) command\n"); | |
3069 | /* non-critical error, don't fail the load */ | |
3070 | } else { | |
3071 | buf = (unsigned char *)dd->port->log_buf; | |
3072 | if (buf[259] & 0x1) { | |
3073 | dev_info(&dd->pdev->dev, | |
3074 | "Write protect bit is set.\n"); | |
8a857a88 | 3075 | set_bit(MTIP_DDF_WRITE_PROTECT_BIT, &dd->dd_flag); |
f6587217 AT |
3076 | } |
3077 | if (buf[288] == 0xF7) { | |
3078 | dev_info(&dd->pdev->dev, | |
3079 | "Exceeded Tmax, drive in thermal shutdown.\n"); | |
8a857a88 | 3080 | set_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag); |
f6587217 AT |
3081 | } |
3082 | if (buf[288] == 0xBF) { | |
3083 | dev_info(&dd->pdev->dev, | |
3084 | "Drive indicates rebuild has failed.\n"); | |
3085 | /* TODO */ | |
3086 | } | |
3087 | } | |
3088 | ||
3089 | /* get write protect progess */ | |
3090 | memset(&attr242, 0, sizeof(struct smart_attr)); | |
3091 | if (mtip_get_smart_attr(dd->port, 242, &attr242)) | |
3092 | dev_warn(&dd->pdev->dev, | |
3093 | "Unable to check write protect progress\n"); | |
3094 | else | |
3095 | dev_info(&dd->pdev->dev, | |
3096 | "Write protect progress: %d%% (%d blocks)\n", | |
3097 | attr242.cur, attr242.data); | |
88523a61 SB |
3098 | return rv; |
3099 | ||
3100 | out3: | |
3101 | del_timer_sync(&dd->port->cmd_timer); | |
3102 | ||
3103 | /* Disable interrupts on the HBA. */ | |
3104 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, | |
3105 | dd->mmio + HOST_CTL); | |
3106 | ||
3107 | /*Release the IRQ. */ | |
3108 | devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd); | |
3109 | ||
3110 | out2: | |
3111 | mtip_deinit_port(dd->port); | |
3112 | ||
3113 | /* Free the command/command header memory. */ | |
3114 | dmam_free_coherent(&dd->pdev->dev, | |
f6587217 | 3115 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
88523a61 SB |
3116 | dd->port->command_list, |
3117 | dd->port->command_list_dma); | |
3118 | out1: | |
3119 | /* Free the memory allocated for the for structure. */ | |
3120 | kfree(dd->port); | |
3121 | ||
3122 | return rv; | |
3123 | } | |
3124 | ||
3125 | /* | |
3126 | * Called to deinitialize an interface. | |
3127 | * | |
3128 | * @dd Pointer to the driver data structure. | |
3129 | * | |
3130 | * return value | |
3131 | * 0 | |
3132 | */ | |
6316668f | 3133 | static int mtip_hw_exit(struct driver_data *dd) |
88523a61 SB |
3134 | { |
3135 | /* | |
3136 | * Send standby immediate (E0h) to the drive so that it | |
3137 | * saves its state. | |
3138 | */ | |
8a857a88 | 3139 | if (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) { |
88523a61 | 3140 | |
8a857a88 | 3141 | if (!test_bit(MTIP_PF_REBUILD_BIT, &dd->port->flags)) |
45038367 AT |
3142 | if (mtip_standby_immediate(dd->port)) |
3143 | dev_warn(&dd->pdev->dev, | |
3144 | "STANDBY IMMEDIATE failed\n"); | |
88523a61 SB |
3145 | |
3146 | /* de-initialize the port. */ | |
3147 | mtip_deinit_port(dd->port); | |
3148 | ||
3149 | /* Disable interrupts on the HBA. */ | |
3150 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, | |
3151 | dd->mmio + HOST_CTL); | |
3152 | } | |
3153 | ||
3154 | del_timer_sync(&dd->port->cmd_timer); | |
3155 | ||
88523a61 SB |
3156 | /* Release the IRQ. */ |
3157 | devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd); | |
3158 | ||
60ec0eec AT |
3159 | /* Stop the bottom half tasklet. */ |
3160 | tasklet_kill(&dd->tasklet); | |
3161 | ||
88523a61 SB |
3162 | /* Free the command/command header memory. */ |
3163 | dmam_free_coherent(&dd->pdev->dev, | |
f6587217 | 3164 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 4), |
88523a61 SB |
3165 | dd->port->command_list, |
3166 | dd->port->command_list_dma); | |
3167 | /* Free the memory allocated for the for structure. */ | |
3168 | kfree(dd->port); | |
3169 | ||
3170 | return 0; | |
3171 | } | |
3172 | ||
3173 | /* | |
3174 | * Issue a Standby Immediate command to the device. | |
3175 | * | |
3176 | * This function is called by the Block Layer just before the | |
3177 | * system powers off during a shutdown. | |
3178 | * | |
3179 | * @dd Pointer to the driver data structure. | |
3180 | * | |
3181 | * return value | |
3182 | * 0 | |
3183 | */ | |
6316668f | 3184 | static int mtip_hw_shutdown(struct driver_data *dd) |
88523a61 SB |
3185 | { |
3186 | /* | |
3187 | * Send standby immediate (E0h) to the drive so that it | |
3188 | * saves its state. | |
3189 | */ | |
3190 | mtip_standby_immediate(dd->port); | |
3191 | ||
3192 | return 0; | |
3193 | } | |
3194 | ||
3195 | /* | |
3196 | * Suspend function | |
3197 | * | |
3198 | * This function is called by the Block Layer just before the | |
3199 | * system hibernates. | |
3200 | * | |
3201 | * @dd Pointer to the driver data structure. | |
3202 | * | |
3203 | * return value | |
3204 | * 0 Suspend was successful | |
3205 | * -EFAULT Suspend was not successful | |
3206 | */ | |
6316668f | 3207 | static int mtip_hw_suspend(struct driver_data *dd) |
88523a61 SB |
3208 | { |
3209 | /* | |
3210 | * Send standby immediate (E0h) to the drive | |
3211 | * so that it saves its state. | |
3212 | */ | |
3213 | if (mtip_standby_immediate(dd->port) != 0) { | |
3214 | dev_err(&dd->pdev->dev, | |
3215 | "Failed standby-immediate command\n"); | |
3216 | return -EFAULT; | |
3217 | } | |
3218 | ||
3219 | /* Disable interrupts on the HBA.*/ | |
3220 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, | |
3221 | dd->mmio + HOST_CTL); | |
3222 | mtip_deinit_port(dd->port); | |
3223 | ||
3224 | return 0; | |
3225 | } | |
3226 | ||
3227 | /* | |
3228 | * Resume function | |
3229 | * | |
3230 | * This function is called by the Block Layer as the | |
3231 | * system resumes. | |
3232 | * | |
3233 | * @dd Pointer to the driver data structure. | |
3234 | * | |
3235 | * return value | |
3236 | * 0 Resume was successful | |
3237 | * -EFAULT Resume was not successful | |
3238 | */ | |
6316668f | 3239 | static int mtip_hw_resume(struct driver_data *dd) |
88523a61 SB |
3240 | { |
3241 | /* Perform any needed hardware setup steps */ | |
3242 | hba_setup(dd); | |
3243 | ||
3244 | /* Reset the HBA */ | |
3245 | if (mtip_hba_reset(dd) != 0) { | |
3246 | dev_err(&dd->pdev->dev, | |
3247 | "Unable to reset the HBA\n"); | |
3248 | return -EFAULT; | |
3249 | } | |
3250 | ||
3251 | /* | |
3252 | * Enable the port, DMA engine, and FIS reception specific | |
3253 | * h/w in controller. | |
3254 | */ | |
3255 | mtip_init_port(dd->port); | |
3256 | mtip_start_port(dd->port); | |
3257 | ||
3258 | /* Enable interrupts on the HBA.*/ | |
3259 | writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, | |
3260 | dd->mmio + HOST_CTL); | |
3261 | ||
3262 | return 0; | |
3263 | } | |
3264 | ||
88523a61 SB |
3265 | /* |
3266 | * Helper function for reusing disk name | |
3267 | * upon hot insertion. | |
3268 | */ | |
3269 | static int rssd_disk_name_format(char *prefix, | |
3270 | int index, | |
3271 | char *buf, | |
3272 | int buflen) | |
3273 | { | |
3274 | const int base = 'z' - 'a' + 1; | |
3275 | char *begin = buf + strlen(prefix); | |
3276 | char *end = buf + buflen; | |
3277 | char *p; | |
3278 | int unit; | |
3279 | ||
3280 | p = end - 1; | |
3281 | *p = '\0'; | |
3282 | unit = base; | |
3283 | do { | |
3284 | if (p == begin) | |
3285 | return -EINVAL; | |
3286 | *--p = 'a' + (index % unit); | |
3287 | index = (index / unit) - 1; | |
3288 | } while (index >= 0); | |
3289 | ||
3290 | memmove(begin, p, end - p); | |
3291 | memcpy(buf, prefix, strlen(prefix)); | |
3292 | ||
3293 | return 0; | |
3294 | } | |
3295 | ||
3296 | /* | |
3297 | * Block layer IOCTL handler. | |
3298 | * | |
3299 | * @dev Pointer to the block_device structure. | |
3300 | * @mode ignored | |
3301 | * @cmd IOCTL command passed from the user application. | |
3302 | * @arg Argument passed from the user application. | |
3303 | * | |
3304 | * return value | |
3305 | * 0 IOCTL completed successfully. | |
3306 | * -ENOTTY IOCTL not supported or invalid driver data | |
3307 | * structure pointer. | |
3308 | */ | |
3309 | static int mtip_block_ioctl(struct block_device *dev, | |
3310 | fmode_t mode, | |
3311 | unsigned cmd, | |
3312 | unsigned long arg) | |
3313 | { | |
3314 | struct driver_data *dd = dev->bd_disk->private_data; | |
3315 | ||
3316 | if (!capable(CAP_SYS_ADMIN)) | |
3317 | return -EACCES; | |
3318 | ||
3319 | if (!dd) | |
3320 | return -ENOTTY; | |
3321 | ||
8a857a88 | 3322 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) |
45038367 AT |
3323 | return -ENOTTY; |
3324 | ||
88523a61 SB |
3325 | switch (cmd) { |
3326 | case BLKFLSBUF: | |
60ec0eec | 3327 | return -ENOTTY; |
88523a61 | 3328 | default: |
ef0f1587 | 3329 | return mtip_hw_ioctl(dd, cmd, arg); |
88523a61 SB |
3330 | } |
3331 | } | |
3332 | ||
16d02c04 | 3333 | #ifdef CONFIG_COMPAT |
88523a61 SB |
3334 | /* |
3335 | * Block layer compat IOCTL handler. | |
3336 | * | |
3337 | * @dev Pointer to the block_device structure. | |
3338 | * @mode ignored | |
3339 | * @cmd IOCTL command passed from the user application. | |
3340 | * @arg Argument passed from the user application. | |
3341 | * | |
3342 | * return value | |
3343 | * 0 IOCTL completed successfully. | |
3344 | * -ENOTTY IOCTL not supported or invalid driver data | |
3345 | * structure pointer. | |
3346 | */ | |
3347 | static int mtip_block_compat_ioctl(struct block_device *dev, | |
3348 | fmode_t mode, | |
3349 | unsigned cmd, | |
3350 | unsigned long arg) | |
3351 | { | |
3352 | struct driver_data *dd = dev->bd_disk->private_data; | |
3353 | ||
3354 | if (!capable(CAP_SYS_ADMIN)) | |
3355 | return -EACCES; | |
3356 | ||
3357 | if (!dd) | |
3358 | return -ENOTTY; | |
3359 | ||
8a857a88 | 3360 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag))) |
45038367 AT |
3361 | return -ENOTTY; |
3362 | ||
88523a61 SB |
3363 | switch (cmd) { |
3364 | case BLKFLSBUF: | |
60ec0eec | 3365 | return -ENOTTY; |
ef0f1587 | 3366 | case HDIO_DRIVE_TASKFILE: { |
60ec0eec | 3367 | struct mtip_compat_ide_task_request_s __user *compat_req_task; |
ef0f1587 JA |
3368 | ide_task_request_t req_task; |
3369 | int compat_tasksize, outtotal, ret; | |
3370 | ||
60ec0eec AT |
3371 | compat_tasksize = |
3372 | sizeof(struct mtip_compat_ide_task_request_s); | |
ef0f1587 JA |
3373 | |
3374 | compat_req_task = | |
3375 | (struct mtip_compat_ide_task_request_s __user *) arg; | |
3376 | ||
3377 | if (copy_from_user(&req_task, (void __user *) arg, | |
60ec0eec | 3378 | compat_tasksize - (2 * sizeof(compat_long_t)))) |
ef0f1587 JA |
3379 | return -EFAULT; |
3380 | ||
3381 | if (get_user(req_task.out_size, &compat_req_task->out_size)) | |
3382 | return -EFAULT; | |
3383 | ||
3384 | if (get_user(req_task.in_size, &compat_req_task->in_size)) | |
3385 | return -EFAULT; | |
3386 | ||
3387 | outtotal = sizeof(struct mtip_compat_ide_task_request_s); | |
3388 | ||
3389 | ret = exec_drive_taskfile(dd, (void __user *) arg, | |
3390 | &req_task, outtotal); | |
3391 | ||
3392 | if (copy_to_user((void __user *) arg, &req_task, | |
3393 | compat_tasksize - | |
3394 | (2 * sizeof(compat_long_t)))) | |
3395 | return -EFAULT; | |
3396 | ||
3397 | if (put_user(req_task.out_size, &compat_req_task->out_size)) | |
3398 | return -EFAULT; | |
3399 | ||
3400 | if (put_user(req_task.in_size, &compat_req_task->in_size)) | |
3401 | return -EFAULT; | |
3402 | ||
3403 | return ret; | |
3404 | } | |
88523a61 | 3405 | default: |
ef0f1587 | 3406 | return mtip_hw_ioctl(dd, cmd, arg); |
88523a61 SB |
3407 | } |
3408 | } | |
16d02c04 | 3409 | #endif |
88523a61 SB |
3410 | |
3411 | /* | |
3412 | * Obtain the geometry of the device. | |
3413 | * | |
3414 | * You may think that this function is obsolete, but some applications, | |
3415 | * fdisk for example still used CHS values. This function describes the | |
3416 | * device as having 224 heads and 56 sectors per cylinder. These values are | |
3417 | * chosen so that each cylinder is aligned on a 4KB boundary. Since a | |
3418 | * partition is described in terms of a start and end cylinder this means | |
3419 | * that each partition is also 4KB aligned. Non-aligned partitions adversely | |
3420 | * affects performance. | |
3421 | * | |
3422 | * @dev Pointer to the block_device strucutre. | |
3423 | * @geo Pointer to a hd_geometry structure. | |
3424 | * | |
3425 | * return value | |
3426 | * 0 Operation completed successfully. | |
3427 | * -ENOTTY An error occurred while reading the drive capacity. | |
3428 | */ | |
3429 | static int mtip_block_getgeo(struct block_device *dev, | |
3430 | struct hd_geometry *geo) | |
3431 | { | |
3432 | struct driver_data *dd = dev->bd_disk->private_data; | |
3433 | sector_t capacity; | |
3434 | ||
3435 | if (!dd) | |
3436 | return -ENOTTY; | |
3437 | ||
3438 | if (!(mtip_hw_get_capacity(dd, &capacity))) { | |
3439 | dev_warn(&dd->pdev->dev, | |
3440 | "Could not get drive capacity.\n"); | |
3441 | return -ENOTTY; | |
3442 | } | |
3443 | ||
3444 | geo->heads = 224; | |
3445 | geo->sectors = 56; | |
60ec0eec | 3446 | sector_div(capacity, (geo->heads * geo->sectors)); |
88523a61 | 3447 | geo->cylinders = capacity; |
88523a61 SB |
3448 | return 0; |
3449 | } | |
3450 | ||
3451 | /* | |
3452 | * Block device operation function. | |
3453 | * | |
3454 | * This structure contains pointers to the functions required by the block | |
3455 | * layer. | |
3456 | */ | |
3457 | static const struct block_device_operations mtip_block_ops = { | |
3458 | .ioctl = mtip_block_ioctl, | |
16d02c04 | 3459 | #ifdef CONFIG_COMPAT |
88523a61 | 3460 | .compat_ioctl = mtip_block_compat_ioctl, |
16d02c04 | 3461 | #endif |
88523a61 SB |
3462 | .getgeo = mtip_block_getgeo, |
3463 | .owner = THIS_MODULE | |
3464 | }; | |
3465 | ||
3466 | /* | |
3467 | * Block layer make request function. | |
3468 | * | |
3469 | * This function is called by the kernel to process a BIO for | |
3470 | * the P320 device. | |
3471 | * | |
3472 | * @queue Pointer to the request queue. Unused other than to obtain | |
3473 | * the driver data structure. | |
3474 | * @bio Pointer to the BIO. | |
3475 | * | |
88523a61 | 3476 | */ |
a71f483d | 3477 | static void mtip_make_request(struct request_queue *queue, struct bio *bio) |
88523a61 SB |
3478 | { |
3479 | struct driver_data *dd = queue->queuedata; | |
3480 | struct scatterlist *sg; | |
3481 | struct bio_vec *bvec; | |
3482 | int nents = 0; | |
3483 | int tag = 0; | |
3484 | ||
c74b0f58 AT |
3485 | if (unlikely(dd->dd_flag & MTIP_DDF_STOP_IO)) { |
3486 | if (unlikely(test_bit(MTIP_DDF_REMOVE_PENDING_BIT, | |
3487 | &dd->dd_flag))) { | |
3488 | bio_endio(bio, -ENXIO); | |
3489 | return; | |
3490 | } | |
3491 | if (unlikely(test_bit(MTIP_DDF_OVER_TEMP_BIT, &dd->dd_flag))) { | |
3492 | bio_endio(bio, -ENODATA); | |
3493 | return; | |
3494 | } | |
3495 | if (unlikely(test_bit(MTIP_DDF_WRITE_PROTECT_BIT, | |
3496 | &dd->dd_flag) && | |
3497 | bio_data_dir(bio))) { | |
3498 | bio_endio(bio, -ENODATA); | |
3499 | return; | |
3500 | } | |
45038367 AT |
3501 | } |
3502 | ||
88523a61 SB |
3503 | if (unlikely(!bio_has_data(bio))) { |
3504 | blk_queue_flush(queue, 0); | |
3505 | bio_endio(bio, 0); | |
a71f483d | 3506 | return; |
88523a61 SB |
3507 | } |
3508 | ||
88523a61 SB |
3509 | sg = mtip_hw_get_scatterlist(dd, &tag); |
3510 | if (likely(sg != NULL)) { | |
3511 | blk_queue_bounce(queue, &bio); | |
3512 | ||
3513 | if (unlikely((bio)->bi_vcnt > MTIP_MAX_SG)) { | |
3514 | dev_warn(&dd->pdev->dev, | |
45038367 | 3515 | "Maximum number of SGL entries exceeded\n"); |
88523a61 SB |
3516 | bio_io_error(bio); |
3517 | mtip_hw_release_scatterlist(dd, tag); | |
a71f483d | 3518 | return; |
88523a61 SB |
3519 | } |
3520 | ||
3521 | /* Create the scatter list for this bio. */ | |
3522 | bio_for_each_segment(bvec, bio, nents) { | |
3523 | sg_set_page(&sg[nents], | |
3524 | bvec->bv_page, | |
3525 | bvec->bv_len, | |
3526 | bvec->bv_offset); | |
3527 | } | |
3528 | ||
3529 | /* Issue the read/write. */ | |
3530 | mtip_hw_submit_io(dd, | |
3531 | bio->bi_sector, | |
3532 | bio_sectors(bio), | |
3533 | nents, | |
3534 | tag, | |
3535 | bio_endio, | |
3536 | bio, | |
88523a61 | 3537 | bio_data_dir(bio)); |
a71f483d | 3538 | } else |
88523a61 | 3539 | bio_io_error(bio); |
88523a61 SB |
3540 | } |
3541 | ||
3542 | /* | |
3543 | * Block layer initialization function. | |
3544 | * | |
3545 | * This function is called once by the PCI layer for each P320 | |
3546 | * device that is connected to the system. | |
3547 | * | |
3548 | * @dd Pointer to the driver data structure. | |
3549 | * | |
3550 | * return value | |
3551 | * 0 on success else an error code. | |
3552 | */ | |
6316668f | 3553 | static int mtip_block_initialize(struct driver_data *dd) |
88523a61 | 3554 | { |
62ee8c13 | 3555 | int rv = 0, wait_for_rebuild = 0; |
88523a61 SB |
3556 | sector_t capacity; |
3557 | unsigned int index = 0; | |
3558 | struct kobject *kobj; | |
60ec0eec | 3559 | unsigned char thd_name[16]; |
88523a61 | 3560 | |
62ee8c13 AT |
3561 | if (dd->disk) |
3562 | goto skip_create_disk; /* hw init done, before rebuild */ | |
3563 | ||
88523a61 | 3564 | /* Initialize the protocol layer. */ |
62ee8c13 AT |
3565 | wait_for_rebuild = mtip_hw_init(dd); |
3566 | if (wait_for_rebuild < 0) { | |
88523a61 SB |
3567 | dev_err(&dd->pdev->dev, |
3568 | "Protocol layer initialization failed\n"); | |
3569 | rv = -EINVAL; | |
3570 | goto protocol_init_error; | |
3571 | } | |
3572 | ||
88523a61 SB |
3573 | dd->disk = alloc_disk(MTIP_MAX_MINORS); |
3574 | if (dd->disk == NULL) { | |
3575 | dev_err(&dd->pdev->dev, | |
3576 | "Unable to allocate gendisk structure\n"); | |
3577 | rv = -EINVAL; | |
3578 | goto alloc_disk_error; | |
3579 | } | |
3580 | ||
3581 | /* Generate the disk name, implemented same as in sd.c */ | |
3582 | do { | |
3583 | if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL)) | |
3584 | goto ida_get_error; | |
3585 | ||
3586 | spin_lock(&rssd_index_lock); | |
3587 | rv = ida_get_new(&rssd_index_ida, &index); | |
3588 | spin_unlock(&rssd_index_lock); | |
3589 | } while (rv == -EAGAIN); | |
3590 | ||
3591 | if (rv) | |
3592 | goto ida_get_error; | |
3593 | ||
3594 | rv = rssd_disk_name_format("rssd", | |
3595 | index, | |
3596 | dd->disk->disk_name, | |
3597 | DISK_NAME_LEN); | |
3598 | if (rv) | |
3599 | goto disk_index_error; | |
3600 | ||
3601 | dd->disk->driverfs_dev = &dd->pdev->dev; | |
3602 | dd->disk->major = dd->major; | |
3603 | dd->disk->first_minor = dd->instance * MTIP_MAX_MINORS; | |
3604 | dd->disk->fops = &mtip_block_ops; | |
88523a61 | 3605 | dd->disk->private_data = dd; |
88523a61 SB |
3606 | dd->index = index; |
3607 | ||
62ee8c13 AT |
3608 | /* |
3609 | * if rebuild pending, start the service thread, and delay the block | |
3610 | * queue creation and add_disk() | |
3611 | */ | |
3612 | if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) | |
3613 | goto start_service_thread; | |
3614 | ||
3615 | skip_create_disk: | |
3616 | /* Allocate the request queue. */ | |
3617 | dd->queue = blk_alloc_queue(GFP_KERNEL); | |
3618 | if (dd->queue == NULL) { | |
3619 | dev_err(&dd->pdev->dev, | |
3620 | "Unable to allocate request queue\n"); | |
3621 | rv = -ENOMEM; | |
3622 | goto block_queue_alloc_init_error; | |
3623 | } | |
3624 | ||
3625 | /* Attach our request function to the request queue. */ | |
3626 | blk_queue_make_request(dd->queue, mtip_make_request); | |
3627 | ||
3628 | dd->disk->queue = dd->queue; | |
3629 | dd->queue->queuedata = dd; | |
3630 | ||
3631 | /* Set device limits. */ | |
3632 | set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags); | |
3633 | blk_queue_max_segments(dd->queue, MTIP_MAX_SG); | |
3634 | blk_queue_physical_block_size(dd->queue, 4096); | |
3635 | blk_queue_io_min(dd->queue, 4096); | |
4e8670e2 AT |
3636 | /* |
3637 | * write back cache is not supported in the device. FUA depends on | |
3638 | * write back cache support, hence setting flush support to zero. | |
3639 | */ | |
62ee8c13 AT |
3640 | blk_queue_flush(dd->queue, 0); |
3641 | ||
88523a61 SB |
3642 | /* Set the capacity of the device in 512 byte sectors. */ |
3643 | if (!(mtip_hw_get_capacity(dd, &capacity))) { | |
3644 | dev_warn(&dd->pdev->dev, | |
3645 | "Could not read drive capacity\n"); | |
3646 | rv = -EIO; | |
3647 | goto read_capacity_error; | |
3648 | } | |
3649 | set_capacity(dd->disk, capacity); | |
3650 | ||
3651 | /* Enable the block device and add it to /dev */ | |
3652 | add_disk(dd->disk); | |
3653 | ||
3654 | /* | |
3655 | * Now that the disk is active, initialize any sysfs attributes | |
3656 | * managed by the protocol layer. | |
3657 | */ | |
3658 | kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); | |
3659 | if (kobj) { | |
3660 | mtip_hw_sysfs_init(dd, kobj); | |
3661 | kobject_put(kobj); | |
3662 | } | |
3663 | ||
45038367 | 3664 | if (dd->mtip_svc_handler) { |
8a857a88 | 3665 | set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); |
62ee8c13 | 3666 | return rv; /* service thread created for handling rebuild */ |
45038367 | 3667 | } |
62ee8c13 AT |
3668 | |
3669 | start_service_thread: | |
60ec0eec AT |
3670 | sprintf(thd_name, "mtip_svc_thd_%02d", index); |
3671 | ||
3672 | dd->mtip_svc_handler = kthread_run(mtip_service_thread, | |
3673 | dd, thd_name); | |
3674 | ||
3675 | if (IS_ERR(dd->mtip_svc_handler)) { | |
c74b0f58 | 3676 | dev_err(&dd->pdev->dev, "service thread failed to start\n"); |
60ec0eec AT |
3677 | dd->mtip_svc_handler = NULL; |
3678 | rv = -EFAULT; | |
62ee8c13 | 3679 | goto kthread_run_error; |
60ec0eec AT |
3680 | } |
3681 | ||
45038367 AT |
3682 | if (wait_for_rebuild == MTIP_FTL_REBUILD_MAGIC) |
3683 | rv = wait_for_rebuild; | |
3684 | ||
88523a61 SB |
3685 | return rv; |
3686 | ||
62ee8c13 AT |
3687 | kthread_run_error: |
3688 | /* Delete our gendisk. This also removes the device from /dev */ | |
88523a61 SB |
3689 | del_gendisk(dd->disk); |
3690 | ||
62ee8c13 AT |
3691 | read_capacity_error: |
3692 | blk_cleanup_queue(dd->queue); | |
3693 | ||
3694 | block_queue_alloc_init_error: | |
88523a61 SB |
3695 | disk_index_error: |
3696 | spin_lock(&rssd_index_lock); | |
3697 | ida_remove(&rssd_index_ida, index); | |
3698 | spin_unlock(&rssd_index_lock); | |
3699 | ||
3700 | ida_get_error: | |
3701 | put_disk(dd->disk); | |
3702 | ||
3703 | alloc_disk_error: | |
62ee8c13 | 3704 | mtip_hw_exit(dd); /* De-initialize the protocol layer. */ |
88523a61 SB |
3705 | |
3706 | protocol_init_error: | |
3707 | return rv; | |
3708 | } | |
3709 | ||
3710 | /* | |
3711 | * Block layer deinitialization function. | |
3712 | * | |
3713 | * Called by the PCI layer as each P320 device is removed. | |
3714 | * | |
3715 | * @dd Pointer to the driver data structure. | |
3716 | * | |
3717 | * return value | |
3718 | * 0 | |
3719 | */ | |
6316668f | 3720 | static int mtip_block_remove(struct driver_data *dd) |
88523a61 SB |
3721 | { |
3722 | struct kobject *kobj; | |
60ec0eec AT |
3723 | |
3724 | if (dd->mtip_svc_handler) { | |
c74b0f58 | 3725 | set_bit(MTIP_PF_SVC_THD_STOP_BIT, &dd->port->flags); |
60ec0eec AT |
3726 | wake_up_interruptible(&dd->port->svc_wait); |
3727 | kthread_stop(dd->mtip_svc_handler); | |
3728 | } | |
3729 | ||
f6587217 | 3730 | /* Clean up the sysfs attributes, if created */ |
8a857a88 | 3731 | if (test_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag)) { |
45038367 AT |
3732 | kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); |
3733 | if (kobj) { | |
3734 | mtip_hw_sysfs_exit(dd, kobj); | |
3735 | kobject_put(kobj); | |
3736 | } | |
88523a61 SB |
3737 | } |
3738 | ||
3739 | /* | |
3740 | * Delete our gendisk structure. This also removes the device | |
3741 | * from /dev | |
3742 | */ | |
3743 | del_gendisk(dd->disk); | |
8182b495 AT |
3744 | |
3745 | spin_lock(&rssd_index_lock); | |
3746 | ida_remove(&rssd_index_ida, dd->index); | |
3747 | spin_unlock(&rssd_index_lock); | |
3748 | ||
88523a61 SB |
3749 | blk_cleanup_queue(dd->queue); |
3750 | dd->disk = NULL; | |
3751 | dd->queue = NULL; | |
3752 | ||
3753 | /* De-initialize the protocol layer. */ | |
3754 | mtip_hw_exit(dd); | |
3755 | ||
3756 | return 0; | |
3757 | } | |
3758 | ||
3759 | /* | |
3760 | * Function called by the PCI layer when just before the | |
3761 | * machine shuts down. | |
3762 | * | |
3763 | * If a protocol layer shutdown function is present it will be called | |
3764 | * by this function. | |
3765 | * | |
3766 | * @dd Pointer to the driver data structure. | |
3767 | * | |
3768 | * return value | |
3769 | * 0 | |
3770 | */ | |
6316668f | 3771 | static int mtip_block_shutdown(struct driver_data *dd) |
88523a61 SB |
3772 | { |
3773 | dev_info(&dd->pdev->dev, | |
3774 | "Shutting down %s ...\n", dd->disk->disk_name); | |
3775 | ||
3776 | /* Delete our gendisk structure, and cleanup the blk queue. */ | |
3777 | del_gendisk(dd->disk); | |
8182b495 AT |
3778 | |
3779 | spin_lock(&rssd_index_lock); | |
3780 | ida_remove(&rssd_index_ida, dd->index); | |
3781 | spin_unlock(&rssd_index_lock); | |
3782 | ||
88523a61 SB |
3783 | blk_cleanup_queue(dd->queue); |
3784 | dd->disk = NULL; | |
3785 | dd->queue = NULL; | |
3786 | ||
3787 | mtip_hw_shutdown(dd); | |
3788 | return 0; | |
3789 | } | |
3790 | ||
6316668f | 3791 | static int mtip_block_suspend(struct driver_data *dd) |
88523a61 SB |
3792 | { |
3793 | dev_info(&dd->pdev->dev, | |
3794 | "Suspending %s ...\n", dd->disk->disk_name); | |
3795 | mtip_hw_suspend(dd); | |
3796 | return 0; | |
3797 | } | |
3798 | ||
6316668f | 3799 | static int mtip_block_resume(struct driver_data *dd) |
88523a61 SB |
3800 | { |
3801 | dev_info(&dd->pdev->dev, "Resuming %s ...\n", | |
3802 | dd->disk->disk_name); | |
3803 | mtip_hw_resume(dd); | |
3804 | return 0; | |
3805 | } | |
3806 | ||
3807 | /* | |
3808 | * Called for each supported PCI device detected. | |
3809 | * | |
3810 | * This function allocates the private data structure, enables the | |
3811 | * PCI device and then calls the block layer initialization function. | |
3812 | * | |
3813 | * return value | |
3814 | * 0 on success else an error code. | |
3815 | */ | |
3816 | static int mtip_pci_probe(struct pci_dev *pdev, | |
3817 | const struct pci_device_id *ent) | |
3818 | { | |
3819 | int rv = 0; | |
3820 | struct driver_data *dd = NULL; | |
3821 | ||
3822 | /* Allocate memory for this devices private data. */ | |
3823 | dd = kzalloc(sizeof(struct driver_data), GFP_KERNEL); | |
3824 | if (dd == NULL) { | |
3825 | dev_err(&pdev->dev, | |
3826 | "Unable to allocate memory for driver data\n"); | |
3827 | return -ENOMEM; | |
3828 | } | |
3829 | ||
88523a61 SB |
3830 | /* Attach the private data to this PCI device. */ |
3831 | pci_set_drvdata(pdev, dd); | |
3832 | ||
3833 | rv = pcim_enable_device(pdev); | |
3834 | if (rv < 0) { | |
3835 | dev_err(&pdev->dev, "Unable to enable device\n"); | |
3836 | goto iomap_err; | |
3837 | } | |
3838 | ||
3839 | /* Map BAR5 to memory. */ | |
3840 | rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME); | |
3841 | if (rv < 0) { | |
3842 | dev_err(&pdev->dev, "Unable to map regions\n"); | |
3843 | goto iomap_err; | |
3844 | } | |
3845 | ||
3846 | if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { | |
3847 | rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); | |
3848 | ||
3849 | if (rv) { | |
3850 | rv = pci_set_consistent_dma_mask(pdev, | |
3851 | DMA_BIT_MASK(32)); | |
3852 | if (rv) { | |
3853 | dev_warn(&pdev->dev, | |
3854 | "64-bit DMA enable failed\n"); | |
3855 | goto setmask_err; | |
3856 | } | |
3857 | } | |
3858 | } | |
3859 | ||
3860 | pci_set_master(pdev); | |
3861 | ||
3862 | if (pci_enable_msi(pdev)) { | |
3863 | dev_warn(&pdev->dev, | |
3864 | "Unable to enable MSI interrupt.\n"); | |
3865 | goto block_initialize_err; | |
3866 | } | |
3867 | ||
3868 | /* Copy the info we may need later into the private data structure. */ | |
3869 | dd->major = mtip_major; | |
88523a61 SB |
3870 | dd->instance = instance; |
3871 | dd->pdev = pdev; | |
3872 | ||
3873 | /* Initialize the block layer. */ | |
3874 | rv = mtip_block_initialize(dd); | |
3875 | if (rv < 0) { | |
3876 | dev_err(&pdev->dev, | |
3877 | "Unable to initialize block layer\n"); | |
3878 | goto block_initialize_err; | |
3879 | } | |
3880 | ||
3881 | /* | |
3882 | * Increment the instance count so that each device has a unique | |
3883 | * instance number. | |
3884 | */ | |
3885 | instance++; | |
45038367 | 3886 | if (rv != MTIP_FTL_REBUILD_MAGIC) |
8a857a88 | 3887 | set_bit(MTIP_DDF_INIT_DONE_BIT, &dd->dd_flag); |
88523a61 SB |
3888 | goto done; |
3889 | ||
3890 | block_initialize_err: | |
3891 | pci_disable_msi(pdev); | |
3892 | ||
3893 | setmask_err: | |
3894 | pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); | |
3895 | ||
3896 | iomap_err: | |
3897 | kfree(dd); | |
3898 | pci_set_drvdata(pdev, NULL); | |
3899 | return rv; | |
3900 | done: | |
88523a61 SB |
3901 | return rv; |
3902 | } | |
3903 | ||
3904 | /* | |
3905 | * Called for each probed device when the device is removed or the | |
3906 | * driver is unloaded. | |
3907 | * | |
3908 | * return value | |
3909 | * None | |
3910 | */ | |
3911 | static void mtip_pci_remove(struct pci_dev *pdev) | |
3912 | { | |
3913 | struct driver_data *dd = pci_get_drvdata(pdev); | |
3914 | int counter = 0; | |
3915 | ||
8a857a88 | 3916 | set_bit(MTIP_DDF_REMOVE_PENDING_BIT, &dd->dd_flag); |
45038367 | 3917 | |
88523a61 | 3918 | if (mtip_check_surprise_removal(pdev)) { |
8a857a88 | 3919 | while (!test_bit(MTIP_DDF_CLEANUP_BIT, &dd->dd_flag)) { |
88523a61 SB |
3920 | counter++; |
3921 | msleep(20); | |
3922 | if (counter == 10) { | |
3923 | /* Cleanup the outstanding commands */ | |
3924 | mtip_command_cleanup(dd); | |
3925 | break; | |
3926 | } | |
3927 | } | |
3928 | } | |
88523a61 SB |
3929 | |
3930 | /* Clean up the block layer. */ | |
3931 | mtip_block_remove(dd); | |
3932 | ||
3933 | pci_disable_msi(pdev); | |
3934 | ||
3935 | kfree(dd); | |
3936 | pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); | |
3937 | } | |
3938 | ||
3939 | /* | |
3940 | * Called for each probed device when the device is suspended. | |
3941 | * | |
3942 | * return value | |
3943 | * 0 Success | |
3944 | * <0 Error | |
3945 | */ | |
3946 | static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) | |
3947 | { | |
3948 | int rv = 0; | |
3949 | struct driver_data *dd = pci_get_drvdata(pdev); | |
3950 | ||
3951 | if (!dd) { | |
3952 | dev_err(&pdev->dev, | |
3953 | "Driver private datastructure is NULL\n"); | |
3954 | return -EFAULT; | |
3955 | } | |
3956 | ||
8a857a88 | 3957 | set_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); |
88523a61 SB |
3958 | |
3959 | /* Disable ports & interrupts then send standby immediate */ | |
3960 | rv = mtip_block_suspend(dd); | |
3961 | if (rv < 0) { | |
3962 | dev_err(&pdev->dev, | |
3963 | "Failed to suspend controller\n"); | |
3964 | return rv; | |
3965 | } | |
3966 | ||
3967 | /* | |
3968 | * Save the pci config space to pdev structure & | |
3969 | * disable the device | |
3970 | */ | |
3971 | pci_save_state(pdev); | |
3972 | pci_disable_device(pdev); | |
3973 | ||
3974 | /* Move to Low power state*/ | |
3975 | pci_set_power_state(pdev, PCI_D3hot); | |
3976 | ||
3977 | return rv; | |
3978 | } | |
3979 | ||
3980 | /* | |
3981 | * Called for each probed device when the device is resumed. | |
3982 | * | |
3983 | * return value | |
3984 | * 0 Success | |
3985 | * <0 Error | |
3986 | */ | |
3987 | static int mtip_pci_resume(struct pci_dev *pdev) | |
3988 | { | |
3989 | int rv = 0; | |
3990 | struct driver_data *dd; | |
3991 | ||
3992 | dd = pci_get_drvdata(pdev); | |
3993 | if (!dd) { | |
3994 | dev_err(&pdev->dev, | |
3995 | "Driver private datastructure is NULL\n"); | |
3996 | return -EFAULT; | |
3997 | } | |
3998 | ||
3999 | /* Move the device to active State */ | |
4000 | pci_set_power_state(pdev, PCI_D0); | |
4001 | ||
4002 | /* Restore PCI configuration space */ | |
4003 | pci_restore_state(pdev); | |
4004 | ||
4005 | /* Enable the PCI device*/ | |
4006 | rv = pcim_enable_device(pdev); | |
4007 | if (rv < 0) { | |
4008 | dev_err(&pdev->dev, | |
4009 | "Failed to enable card during resume\n"); | |
4010 | goto err; | |
4011 | } | |
4012 | pci_set_master(pdev); | |
4013 | ||
4014 | /* | |
4015 | * Calls hbaReset, initPort, & startPort function | |
4016 | * then enables interrupts | |
4017 | */ | |
4018 | rv = mtip_block_resume(dd); | |
4019 | if (rv < 0) | |
4020 | dev_err(&pdev->dev, "Unable to resume\n"); | |
4021 | ||
4022 | err: | |
8a857a88 | 4023 | clear_bit(MTIP_DDF_RESUME_BIT, &dd->dd_flag); |
88523a61 SB |
4024 | |
4025 | return rv; | |
4026 | } | |
4027 | ||
4028 | /* | |
4029 | * Shutdown routine | |
4030 | * | |
4031 | * return value | |
4032 | * None | |
4033 | */ | |
4034 | static void mtip_pci_shutdown(struct pci_dev *pdev) | |
4035 | { | |
4036 | struct driver_data *dd = pci_get_drvdata(pdev); | |
4037 | if (dd) | |
4038 | mtip_block_shutdown(dd); | |
4039 | } | |
4040 | ||
88523a61 SB |
4041 | /* Table of device ids supported by this driver. */ |
4042 | static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl) = { | |
4043 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320_DEVICE_ID) }, | |
4044 | { 0 } | |
4045 | }; | |
4046 | ||
4047 | /* Structure that describes the PCI driver functions. */ | |
3ff147d3 | 4048 | static struct pci_driver mtip_pci_driver = { |
88523a61 SB |
4049 | .name = MTIP_DRV_NAME, |
4050 | .id_table = mtip_pci_tbl, | |
4051 | .probe = mtip_pci_probe, | |
4052 | .remove = mtip_pci_remove, | |
4053 | .suspend = mtip_pci_suspend, | |
4054 | .resume = mtip_pci_resume, | |
4055 | .shutdown = mtip_pci_shutdown, | |
4056 | }; | |
4057 | ||
4058 | MODULE_DEVICE_TABLE(pci, mtip_pci_tbl); | |
4059 | ||
4060 | /* | |
4061 | * Module initialization function. | |
4062 | * | |
4063 | * Called once when the module is loaded. This function allocates a major | |
4064 | * block device number to the Cyclone devices and registers the PCI layer | |
4065 | * of the driver. | |
4066 | * | |
4067 | * Return value | |
4068 | * 0 on success else error code. | |
4069 | */ | |
4070 | static int __init mtip_init(void) | |
4071 | { | |
6d27f09a RS |
4072 | int error; |
4073 | ||
88523a61 SB |
4074 | printk(KERN_INFO MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n"); |
4075 | ||
4076 | /* Allocate a major block device number to use with this driver. */ | |
6d27f09a RS |
4077 | error = register_blkdev(0, MTIP_DRV_NAME); |
4078 | if (error <= 0) { | |
88523a61 | 4079 | printk(KERN_ERR "Unable to register block device (%d)\n", |
6d27f09a | 4080 | error); |
88523a61 SB |
4081 | return -EBUSY; |
4082 | } | |
6d27f09a | 4083 | mtip_major = error; |
88523a61 SB |
4084 | |
4085 | /* Register our PCI operations. */ | |
6d27f09a RS |
4086 | error = pci_register_driver(&mtip_pci_driver); |
4087 | if (error) | |
4088 | unregister_blkdev(mtip_major, MTIP_DRV_NAME); | |
4089 | ||
4090 | return error; | |
88523a61 SB |
4091 | } |
4092 | ||
4093 | /* | |
4094 | * Module de-initialization function. | |
4095 | * | |
4096 | * Called once when the module is unloaded. This function deallocates | |
4097 | * the major block device number allocated by mtip_init() and | |
4098 | * unregisters the PCI layer of the driver. | |
4099 | * | |
4100 | * Return value | |
4101 | * none | |
4102 | */ | |
4103 | static void __exit mtip_exit(void) | |
4104 | { | |
4105 | /* Release the allocated major block device number. */ | |
4106 | unregister_blkdev(mtip_major, MTIP_DRV_NAME); | |
4107 | ||
4108 | /* Unregister the PCI driver. */ | |
4109 | pci_unregister_driver(&mtip_pci_driver); | |
4110 | } | |
4111 | ||
4112 | MODULE_AUTHOR("Micron Technology, Inc"); | |
4113 | MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver"); | |
4114 | MODULE_LICENSE("GPL"); | |
4115 | MODULE_VERSION(MTIP_DRV_VERSION); | |
4116 | ||
4117 | module_init(mtip_init); | |
4118 | module_exit(mtip_exit); |