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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> | |
37 | #include <../drivers/ata/ahci.h> | |
38 | #include "mtip32xx.h" | |
39 | ||
40 | #define HW_CMD_SLOT_SZ (MTIP_MAX_COMMAND_SLOTS * 32) | |
41 | #define HW_CMD_TBL_SZ (AHCI_CMD_TBL_HDR_SZ + (MTIP_MAX_SG * 16)) | |
42 | #define HW_CMD_TBL_AR_SZ (HW_CMD_TBL_SZ * MTIP_MAX_COMMAND_SLOTS) | |
43 | #define HW_PORT_PRIV_DMA_SZ \ | |
44 | (HW_CMD_SLOT_SZ + HW_CMD_TBL_AR_SZ + AHCI_RX_FIS_SZ) | |
45 | ||
46 | #define HOST_HSORG 0xFC | |
47 | #define HSORG_DISABLE_SLOTGRP_INTR (1<<24) | |
48 | #define HSORG_DISABLE_SLOTGRP_PXIS (1<<16) | |
49 | #define HSORG_HWREV 0xFF00 | |
50 | #define HSORG_STYLE 0x8 | |
51 | #define HSORG_SLOTGROUPS 0x7 | |
52 | ||
53 | #define PORT_COMMAND_ISSUE 0x38 | |
54 | #define PORT_SDBV 0x7C | |
55 | ||
56 | #define PORT_OFFSET 0x100 | |
57 | #define PORT_MEM_SIZE 0x80 | |
58 | ||
59 | #define PORT_IRQ_ERR \ | |
60 | (PORT_IRQ_HBUS_ERR | PORT_IRQ_IF_ERR | PORT_IRQ_CONNECT | \ | |
61 | PORT_IRQ_PHYRDY | PORT_IRQ_UNK_FIS | PORT_IRQ_BAD_PMP | \ | |
62 | PORT_IRQ_TF_ERR | PORT_IRQ_HBUS_DATA_ERR | PORT_IRQ_IF_NONFATAL | \ | |
63 | PORT_IRQ_OVERFLOW) | |
64 | #define PORT_IRQ_LEGACY \ | |
65 | (PORT_IRQ_PIOS_FIS | PORT_IRQ_D2H_REG_FIS) | |
66 | #define PORT_IRQ_HANDLED \ | |
67 | (PORT_IRQ_SDB_FIS | PORT_IRQ_LEGACY | \ | |
68 | PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR | \ | |
69 | PORT_IRQ_CONNECT | PORT_IRQ_PHYRDY) | |
70 | #define DEF_PORT_IRQ \ | |
71 | (PORT_IRQ_ERR | PORT_IRQ_LEGACY | PORT_IRQ_SDB_FIS) | |
72 | ||
73 | /* product numbers */ | |
74 | #define MTIP_PRODUCT_UNKNOWN 0x00 | |
75 | #define MTIP_PRODUCT_ASICFPGA 0x11 | |
76 | ||
77 | /* Device instance number, incremented each time a device is probed. */ | |
78 | static int instance; | |
79 | ||
80 | /* | |
81 | * Global variable used to hold the major block device number | |
82 | * allocated in mtip_init(). | |
83 | */ | |
3ff147d3 | 84 | static int mtip_major; |
88523a61 SB |
85 | |
86 | static DEFINE_SPINLOCK(rssd_index_lock); | |
87 | static DEFINE_IDA(rssd_index_ida); | |
88 | ||
16d02c04 | 89 | #ifdef CONFIG_COMPAT |
88523a61 SB |
90 | struct mtip_compat_ide_task_request_s { |
91 | __u8 io_ports[8]; | |
92 | __u8 hob_ports[8]; | |
93 | ide_reg_valid_t out_flags; | |
94 | ide_reg_valid_t in_flags; | |
95 | int data_phase; | |
96 | int req_cmd; | |
97 | compat_ulong_t out_size; | |
98 | compat_ulong_t in_size; | |
99 | }; | |
16d02c04 | 100 | #endif |
88523a61 SB |
101 | |
102 | static int mtip_exec_internal_command(struct mtip_port *port, | |
103 | void *fis, | |
104 | int fisLen, | |
105 | dma_addr_t buffer, | |
106 | int bufLen, | |
107 | u32 opts, | |
108 | gfp_t atomic, | |
109 | unsigned long timeout); | |
110 | ||
6316668f JA |
111 | /* |
112 | * This function check_for_surprise_removal is called | |
113 | * while card is removed from the system and it will | |
114 | * read the vendor id from the configration space | |
115 | * | |
116 | * @pdev Pointer to the pci_dev structure. | |
117 | * | |
118 | * return value | |
119 | * true if device removed, else false | |
120 | */ | |
121 | static bool mtip_check_surprise_removal(struct pci_dev *pdev) | |
122 | { | |
123 | u16 vendor_id = 0; | |
124 | ||
125 | /* Read the vendorID from the configuration space */ | |
126 | pci_read_config_word(pdev, 0x00, &vendor_id); | |
127 | if (vendor_id == 0xFFFF) | |
128 | return true; /* device removed */ | |
129 | ||
130 | return false; /* device present */ | |
131 | } | |
132 | ||
133 | /* | |
134 | * This function is called for clean the pending command in the | |
135 | * command slot during the surprise removal of device and return | |
136 | * error to the upper layer. | |
137 | * | |
138 | * @dd Pointer to the DRIVER_DATA structure. | |
139 | * | |
140 | * return value | |
141 | * None | |
142 | */ | |
143 | static void mtip_command_cleanup(struct driver_data *dd) | |
144 | { | |
145 | int group = 0, commandslot = 0, commandindex = 0; | |
146 | struct mtip_cmd *command; | |
147 | struct mtip_port *port = dd->port; | |
148 | ||
149 | for (group = 0; group < 4; group++) { | |
150 | for (commandslot = 0; commandslot < 32; commandslot++) { | |
151 | if (!(port->allocated[group] & (1 << commandslot))) | |
152 | continue; | |
153 | ||
154 | commandindex = group << 5 | commandslot; | |
155 | command = &port->commands[commandindex]; | |
156 | ||
157 | if (atomic_read(&command->active) | |
158 | && (command->async_callback)) { | |
159 | command->async_callback(command->async_data, | |
160 | -ENODEV); | |
161 | command->async_callback = NULL; | |
162 | command->async_data = NULL; | |
163 | } | |
164 | ||
165 | dma_unmap_sg(&port->dd->pdev->dev, | |
166 | command->sg, | |
167 | command->scatter_ents, | |
168 | command->direction); | |
169 | } | |
170 | } | |
171 | ||
172 | up(&port->cmd_slot); | |
173 | ||
174 | atomic_set(&dd->drv_cleanup_done, true); | |
175 | } | |
176 | ||
88523a61 SB |
177 | /* |
178 | * Obtain an empty command slot. | |
179 | * | |
180 | * This function needs to be reentrant since it could be called | |
181 | * at the same time on multiple CPUs. The allocation of the | |
182 | * command slot must be atomic. | |
183 | * | |
184 | * @port Pointer to the port data structure. | |
185 | * | |
186 | * return value | |
187 | * >= 0 Index of command slot obtained. | |
188 | * -1 No command slots available. | |
189 | */ | |
190 | static int get_slot(struct mtip_port *port) | |
191 | { | |
192 | int slot, i; | |
193 | unsigned int num_command_slots = port->dd->slot_groups * 32; | |
194 | ||
195 | /* | |
196 | * Try 10 times, because there is a small race here. | |
197 | * that's ok, because it's still cheaper than a lock. | |
198 | * | |
199 | * Race: Since this section is not protected by lock, same bit | |
200 | * could be chosen by different process contexts running in | |
201 | * different processor. So instead of costly lock, we are going | |
202 | * with loop. | |
203 | */ | |
204 | for (i = 0; i < 10; i++) { | |
205 | slot = find_next_zero_bit(port->allocated, | |
206 | num_command_slots, 1); | |
207 | if ((slot < num_command_slots) && | |
208 | (!test_and_set_bit(slot, port->allocated))) | |
209 | return slot; | |
210 | } | |
211 | dev_warn(&port->dd->pdev->dev, "Failed to get a tag.\n"); | |
212 | ||
213 | if (mtip_check_surprise_removal(port->dd->pdev)) { | |
214 | /* Device not present, clean outstanding commands */ | |
215 | mtip_command_cleanup(port->dd); | |
216 | } | |
217 | return -1; | |
218 | } | |
219 | ||
220 | /* | |
221 | * Release a command slot. | |
222 | * | |
223 | * @port Pointer to the port data structure. | |
224 | * @tag Tag of command to release | |
225 | * | |
226 | * return value | |
227 | * None | |
228 | */ | |
229 | static inline void release_slot(struct mtip_port *port, int tag) | |
230 | { | |
231 | smp_mb__before_clear_bit(); | |
232 | clear_bit(tag, port->allocated); | |
233 | smp_mb__after_clear_bit(); | |
234 | } | |
235 | ||
236 | /* | |
6316668f | 237 | * Reset the HBA (without sleeping) |
88523a61 | 238 | * |
6316668f JA |
239 | * Just like hba_reset, except does not call sleep, so can be |
240 | * run from interrupt/tasklet context. | |
88523a61 | 241 | * |
6316668f | 242 | * @dd Pointer to the driver data structure. |
88523a61 SB |
243 | * |
244 | * return value | |
6316668f JA |
245 | * 0 The reset was successful. |
246 | * -1 The HBA Reset bit did not clear. | |
88523a61 | 247 | */ |
6316668f | 248 | static int hba_reset_nosleep(struct driver_data *dd) |
88523a61 | 249 | { |
6316668f | 250 | unsigned long timeout; |
88523a61 | 251 | |
6316668f JA |
252 | /* Chip quirk: quiesce any chip function */ |
253 | mdelay(10); | |
88523a61 | 254 | |
6316668f JA |
255 | /* Set the reset bit */ |
256 | writel(HOST_RESET, dd->mmio + HOST_CTL); | |
88523a61 | 257 | |
6316668f JA |
258 | /* Flush */ |
259 | readl(dd->mmio + HOST_CTL); | |
88523a61 | 260 | |
6316668f JA |
261 | /* |
262 | * Wait 10ms then spin for up to 1 second | |
263 | * waiting for reset acknowledgement | |
264 | */ | |
265 | timeout = jiffies + msecs_to_jiffies(1000); | |
266 | mdelay(10); | |
267 | while ((readl(dd->mmio + HOST_CTL) & HOST_RESET) | |
268 | && time_before(jiffies, timeout)) | |
269 | mdelay(1); | |
88523a61 | 270 | |
6316668f JA |
271 | if (readl(dd->mmio + HOST_CTL) & HOST_RESET) |
272 | return -1; | |
88523a61 | 273 | |
6316668f | 274 | return 0; |
88523a61 SB |
275 | } |
276 | ||
277 | /* | |
6316668f | 278 | * Issue a command to the hardware. |
88523a61 | 279 | * |
6316668f JA |
280 | * Set the appropriate bit in the s_active and Command Issue hardware |
281 | * registers, causing hardware command processing to begin. | |
88523a61 | 282 | * |
6316668f JA |
283 | * @port Pointer to the port structure. |
284 | * @tag The tag of the command to be issued. | |
88523a61 SB |
285 | * |
286 | * return value | |
6316668f | 287 | * None |
88523a61 | 288 | */ |
6316668f | 289 | static inline void mtip_issue_ncq_command(struct mtip_port *port, int tag) |
88523a61 | 290 | { |
6316668f | 291 | unsigned long flags = 0; |
88523a61 | 292 | |
6316668f | 293 | atomic_set(&port->commands[tag].active, 1); |
88523a61 | 294 | |
6316668f | 295 | spin_lock_irqsave(&port->cmd_issue_lock, flags); |
88523a61 | 296 | |
6316668f JA |
297 | writel((1 << MTIP_TAG_BIT(tag)), |
298 | port->s_active[MTIP_TAG_INDEX(tag)]); | |
299 | writel((1 << MTIP_TAG_BIT(tag)), | |
300 | port->cmd_issue[MTIP_TAG_INDEX(tag)]); | |
88523a61 | 301 | |
6316668f | 302 | spin_unlock_irqrestore(&port->cmd_issue_lock, flags); |
88523a61 SB |
303 | } |
304 | ||
305 | /* | |
306 | * Enable/disable the reception of FIS | |
307 | * | |
308 | * @port Pointer to the port data structure | |
309 | * @enable 1 to enable, 0 to disable | |
310 | * | |
311 | * return value | |
312 | * Previous state: 1 enabled, 0 disabled | |
313 | */ | |
314 | static int mtip_enable_fis(struct mtip_port *port, int enable) | |
315 | { | |
316 | u32 tmp; | |
317 | ||
318 | /* enable FIS reception */ | |
319 | tmp = readl(port->mmio + PORT_CMD); | |
320 | if (enable) | |
321 | writel(tmp | PORT_CMD_FIS_RX, port->mmio + PORT_CMD); | |
322 | else | |
323 | writel(tmp & ~PORT_CMD_FIS_RX, port->mmio + PORT_CMD); | |
324 | ||
325 | /* Flush */ | |
326 | readl(port->mmio + PORT_CMD); | |
327 | ||
328 | return (((tmp & PORT_CMD_FIS_RX) == PORT_CMD_FIS_RX)); | |
329 | } | |
330 | ||
331 | /* | |
332 | * Enable/disable the DMA engine | |
333 | * | |
334 | * @port Pointer to the port data structure | |
335 | * @enable 1 to enable, 0 to disable | |
336 | * | |
337 | * return value | |
338 | * Previous state: 1 enabled, 0 disabled. | |
339 | */ | |
340 | static int mtip_enable_engine(struct mtip_port *port, int enable) | |
341 | { | |
342 | u32 tmp; | |
343 | ||
344 | /* enable FIS reception */ | |
345 | tmp = readl(port->mmio + PORT_CMD); | |
346 | if (enable) | |
347 | writel(tmp | PORT_CMD_START, port->mmio + PORT_CMD); | |
348 | else | |
349 | writel(tmp & ~PORT_CMD_START, port->mmio + PORT_CMD); | |
350 | ||
351 | readl(port->mmio + PORT_CMD); | |
352 | return (((tmp & PORT_CMD_START) == PORT_CMD_START)); | |
353 | } | |
354 | ||
355 | /* | |
356 | * Enables the port DMA engine and FIS reception. | |
357 | * | |
358 | * return value | |
359 | * None | |
360 | */ | |
361 | static inline void mtip_start_port(struct mtip_port *port) | |
362 | { | |
363 | /* Enable FIS reception */ | |
364 | mtip_enable_fis(port, 1); | |
365 | ||
366 | /* Enable the DMA engine */ | |
367 | mtip_enable_engine(port, 1); | |
368 | } | |
369 | ||
370 | /* | |
371 | * Deinitialize a port by disabling port interrupts, the DMA engine, | |
372 | * and FIS reception. | |
373 | * | |
374 | * @port Pointer to the port structure | |
375 | * | |
376 | * return value | |
377 | * None | |
378 | */ | |
379 | static inline void mtip_deinit_port(struct mtip_port *port) | |
380 | { | |
381 | /* Disable interrupts on this port */ | |
382 | writel(0, port->mmio + PORT_IRQ_MASK); | |
383 | ||
384 | /* Disable the DMA engine */ | |
385 | mtip_enable_engine(port, 0); | |
386 | ||
387 | /* Disable FIS reception */ | |
388 | mtip_enable_fis(port, 0); | |
389 | } | |
390 | ||
391 | /* | |
392 | * Initialize a port. | |
393 | * | |
394 | * This function deinitializes the port by calling mtip_deinit_port() and | |
395 | * then initializes it by setting the command header and RX FIS addresses, | |
396 | * clearing the SError register and any pending port interrupts before | |
397 | * re-enabling the default set of port interrupts. | |
398 | * | |
399 | * @port Pointer to the port structure. | |
400 | * | |
401 | * return value | |
402 | * None | |
403 | */ | |
404 | static void mtip_init_port(struct mtip_port *port) | |
405 | { | |
406 | int i; | |
407 | mtip_deinit_port(port); | |
408 | ||
409 | /* Program the command list base and FIS base addresses */ | |
410 | if (readl(port->dd->mmio + HOST_CAP) & HOST_CAP_64) { | |
411 | writel((port->command_list_dma >> 16) >> 16, | |
412 | port->mmio + PORT_LST_ADDR_HI); | |
413 | writel((port->rxfis_dma >> 16) >> 16, | |
414 | port->mmio + PORT_FIS_ADDR_HI); | |
415 | } | |
416 | ||
417 | writel(port->command_list_dma & 0xffffffff, | |
418 | port->mmio + PORT_LST_ADDR); | |
419 | writel(port->rxfis_dma & 0xffffffff, port->mmio + PORT_FIS_ADDR); | |
420 | ||
421 | /* Clear SError */ | |
422 | writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR); | |
423 | ||
6316668f JA |
424 | /* reset the completed registers.*/ |
425 | for (i = 0; i < port->dd->slot_groups; i++) | |
426 | writel(0xFFFFFFFF, port->completed[i]); | |
88523a61 | 427 | |
6316668f JA |
428 | /* Clear any pending interrupts for this port */ |
429 | writel(readl(port->mmio + PORT_IRQ_STAT), port->mmio + PORT_IRQ_STAT); | |
88523a61 | 430 | |
6316668f JA |
431 | /* Enable port interrupts */ |
432 | writel(DEF_PORT_IRQ, port->mmio + PORT_IRQ_MASK); | |
88523a61 SB |
433 | } |
434 | ||
435 | /* | |
436 | * Restart a port | |
437 | * | |
438 | * @port Pointer to the port data structure. | |
439 | * | |
440 | * return value | |
441 | * None | |
442 | */ | |
6316668f | 443 | static void mtip_restart_port(struct mtip_port *port) |
88523a61 SB |
444 | { |
445 | unsigned long timeout; | |
446 | ||
447 | /* Disable the DMA engine */ | |
448 | mtip_enable_engine(port, 0); | |
449 | ||
450 | /* Chip quirk: wait up to 500ms for PxCMD.CR == 0 */ | |
451 | timeout = jiffies + msecs_to_jiffies(500); | |
452 | while ((readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) | |
453 | && time_before(jiffies, timeout)) | |
454 | ; | |
455 | ||
456 | /* | |
457 | * Chip quirk: escalate to hba reset if | |
458 | * PxCMD.CR not clear after 500 ms | |
459 | */ | |
460 | if (readl(port->mmio + PORT_CMD) & PORT_CMD_LIST_ON) { | |
461 | dev_warn(&port->dd->pdev->dev, | |
462 | "PxCMD.CR not clear, escalating reset\n"); | |
463 | ||
464 | if (hba_reset_nosleep(port->dd)) | |
465 | dev_err(&port->dd->pdev->dev, | |
466 | "HBA reset escalation failed.\n"); | |
467 | ||
468 | /* 30 ms delay before com reset to quiesce chip */ | |
469 | mdelay(30); | |
470 | } | |
471 | ||
472 | dev_warn(&port->dd->pdev->dev, "Issuing COM reset\n"); | |
473 | ||
474 | /* Set PxSCTL.DET */ | |
475 | writel(readl(port->mmio + PORT_SCR_CTL) | | |
476 | 1, port->mmio + PORT_SCR_CTL); | |
477 | readl(port->mmio + PORT_SCR_CTL); | |
478 | ||
479 | /* Wait 1 ms to quiesce chip function */ | |
480 | timeout = jiffies + msecs_to_jiffies(1); | |
481 | while (time_before(jiffies, timeout)) | |
482 | ; | |
483 | ||
484 | /* Clear PxSCTL.DET */ | |
485 | writel(readl(port->mmio + PORT_SCR_CTL) & ~1, | |
486 | port->mmio + PORT_SCR_CTL); | |
487 | readl(port->mmio + PORT_SCR_CTL); | |
488 | ||
489 | /* Wait 500 ms for bit 0 of PORT_SCR_STS to be set */ | |
490 | timeout = jiffies + msecs_to_jiffies(500); | |
491 | while (((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) | |
492 | && time_before(jiffies, timeout)) | |
493 | ; | |
494 | ||
495 | if ((readl(port->mmio + PORT_SCR_STAT) & 0x01) == 0) | |
496 | dev_warn(&port->dd->pdev->dev, | |
497 | "COM reset failed\n"); | |
498 | ||
499 | /* Clear SError, the PxSERR.DIAG.x should be set so clear it */ | |
500 | writel(readl(port->mmio + PORT_SCR_ERR), port->mmio + PORT_SCR_ERR); | |
501 | ||
502 | /* Enable the DMA engine */ | |
503 | mtip_enable_engine(port, 1); | |
504 | } | |
505 | ||
6316668f JA |
506 | /* |
507 | * Called periodically to see if any read/write commands are | |
508 | * taking too long to complete. | |
509 | * | |
510 | * @data Pointer to the PORT data structure. | |
511 | * | |
512 | * return value | |
513 | * None | |
514 | */ | |
515 | static void mtip_timeout_function(unsigned long int data) | |
516 | { | |
517 | struct mtip_port *port = (struct mtip_port *) data; | |
518 | struct host_to_dev_fis *fis; | |
519 | struct mtip_cmd *command; | |
520 | int tag, cmdto_cnt = 0; | |
521 | unsigned int bit, group; | |
522 | unsigned int num_command_slots = port->dd->slot_groups * 32; | |
523 | ||
524 | if (unlikely(!port)) | |
525 | return; | |
526 | ||
527 | if (atomic_read(&port->dd->resumeflag) == true) { | |
528 | mod_timer(&port->cmd_timer, | |
529 | jiffies + msecs_to_jiffies(30000)); | |
530 | return; | |
531 | } | |
532 | ||
533 | for (tag = 0; tag < num_command_slots; tag++) { | |
534 | /* | |
535 | * Skip internal command slot as it has | |
536 | * its own timeout mechanism | |
537 | */ | |
538 | if (tag == MTIP_TAG_INTERNAL) | |
539 | continue; | |
540 | ||
541 | if (atomic_read(&port->commands[tag].active) && | |
542 | (time_after(jiffies, port->commands[tag].comp_time))) { | |
543 | group = tag >> 5; | |
544 | bit = tag & 0x1f; | |
545 | ||
546 | command = &port->commands[tag]; | |
547 | fis = (struct host_to_dev_fis *) command->command; | |
548 | ||
549 | dev_warn(&port->dd->pdev->dev, | |
550 | "Timeout for command tag %d\n", tag); | |
551 | ||
552 | cmdto_cnt++; | |
553 | if (cmdto_cnt == 1) | |
554 | atomic_inc(&port->dd->eh_active); | |
555 | ||
556 | /* | |
557 | * Clear the completed bit. This should prevent | |
558 | * any interrupt handlers from trying to retire | |
559 | * the command. | |
560 | */ | |
561 | writel(1 << bit, port->completed[group]); | |
562 | ||
563 | /* Call the async completion callback. */ | |
564 | if (likely(command->async_callback)) | |
565 | command->async_callback(command->async_data, | |
566 | -EIO); | |
567 | command->async_callback = NULL; | |
568 | command->comp_func = NULL; | |
569 | ||
570 | /* Unmap the DMA scatter list entries */ | |
571 | dma_unmap_sg(&port->dd->pdev->dev, | |
572 | command->sg, | |
573 | command->scatter_ents, | |
574 | command->direction); | |
575 | ||
576 | /* | |
577 | * Clear the allocated bit and active tag for the | |
578 | * command. | |
579 | */ | |
580 | atomic_set(&port->commands[tag].active, 0); | |
581 | release_slot(port, tag); | |
582 | ||
583 | up(&port->cmd_slot); | |
584 | } | |
585 | } | |
586 | ||
587 | if (cmdto_cnt) { | |
588 | dev_warn(&port->dd->pdev->dev, | |
589 | "%d commands timed out: restarting port", | |
590 | cmdto_cnt); | |
591 | mtip_restart_port(port); | |
592 | atomic_dec(&port->dd->eh_active); | |
593 | } | |
594 | ||
595 | /* Restart the timer */ | |
596 | mod_timer(&port->cmd_timer, | |
597 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); | |
598 | } | |
599 | ||
600 | /* | |
601 | * IO completion function. | |
602 | * | |
603 | * This completion function is called by the driver ISR when a | |
604 | * command that was issued by the kernel completes. It first calls the | |
605 | * asynchronous completion function which normally calls back into the block | |
606 | * layer passing the asynchronous callback data, then unmaps the | |
607 | * scatter list associated with the completed command, and finally | |
608 | * clears the allocated bit associated with the completed command. | |
609 | * | |
610 | * @port Pointer to the port data structure. | |
611 | * @tag Tag of the command. | |
612 | * @data Pointer to driver_data. | |
613 | * @status Completion status. | |
614 | * | |
615 | * return value | |
616 | * None | |
617 | */ | |
618 | static void mtip_async_complete(struct mtip_port *port, | |
619 | int tag, | |
620 | void *data, | |
621 | int status) | |
622 | { | |
623 | struct mtip_cmd *command; | |
624 | struct driver_data *dd = data; | |
625 | int cb_status = status ? -EIO : 0; | |
626 | ||
627 | if (unlikely(!dd) || unlikely(!port)) | |
628 | return; | |
629 | ||
630 | command = &port->commands[tag]; | |
631 | ||
632 | if (unlikely(status == PORT_IRQ_TF_ERR)) { | |
633 | dev_warn(&port->dd->pdev->dev, | |
634 | "Command tag %d failed due to TFE\n", tag); | |
635 | } | |
636 | ||
637 | /* Upper layer callback */ | |
638 | if (likely(command->async_callback)) | |
639 | command->async_callback(command->async_data, cb_status); | |
640 | ||
641 | command->async_callback = NULL; | |
642 | command->comp_func = NULL; | |
643 | ||
644 | /* Unmap the DMA scatter list entries */ | |
645 | dma_unmap_sg(&dd->pdev->dev, | |
646 | command->sg, | |
647 | command->scatter_ents, | |
648 | command->direction); | |
649 | ||
650 | /* Clear the allocated and active bits for the command */ | |
651 | atomic_set(&port->commands[tag].active, 0); | |
652 | release_slot(port, tag); | |
653 | ||
654 | up(&port->cmd_slot); | |
655 | } | |
656 | ||
657 | /* | |
658 | * Internal command completion callback function. | |
659 | * | |
660 | * This function is normally called by the driver ISR when an internal | |
661 | * command completed. This function signals the command completion by | |
662 | * calling complete(). | |
663 | * | |
664 | * @port Pointer to the port data structure. | |
665 | * @tag Tag of the command that has completed. | |
666 | * @data Pointer to a completion structure. | |
667 | * @status Completion status. | |
668 | * | |
669 | * return value | |
670 | * None | |
671 | */ | |
672 | static void mtip_completion(struct mtip_port *port, | |
673 | int tag, | |
674 | void *data, | |
675 | int status) | |
676 | { | |
677 | struct mtip_cmd *command = &port->commands[tag]; | |
678 | struct completion *waiting = data; | |
679 | if (unlikely(status == PORT_IRQ_TF_ERR)) | |
680 | dev_warn(&port->dd->pdev->dev, | |
681 | "Internal command %d completed with TFE\n", tag); | |
682 | ||
683 | command->async_callback = NULL; | |
684 | command->comp_func = NULL; | |
685 | ||
686 | complete(waiting); | |
687 | } | |
688 | ||
88523a61 SB |
689 | /* |
690 | * Helper function for tag logging | |
691 | */ | |
692 | static void print_tags(struct driver_data *dd, | |
693 | char *msg, | |
694 | unsigned long *tagbits) | |
695 | { | |
696 | unsigned int tag, count = 0; | |
697 | ||
698 | for (tag = 0; tag < (dd->slot_groups) * 32; tag++) { | |
699 | if (test_bit(tag, tagbits)) | |
700 | count++; | |
701 | } | |
702 | if (count) | |
703 | dev_info(&dd->pdev->dev, "%s [%i tags]\n", msg, count); | |
704 | } | |
705 | ||
706 | /* | |
707 | * Handle an error. | |
708 | * | |
709 | * @dd Pointer to the DRIVER_DATA structure. | |
710 | * | |
711 | * return value | |
712 | * None | |
713 | */ | |
714 | static void mtip_handle_tfe(struct driver_data *dd) | |
715 | { | |
716 | int group, tag, bit, reissue; | |
717 | struct mtip_port *port; | |
718 | struct mtip_cmd *command; | |
719 | u32 completed; | |
720 | struct host_to_dev_fis *fis; | |
721 | unsigned long tagaccum[SLOTBITS_IN_LONGS]; | |
722 | ||
723 | dev_warn(&dd->pdev->dev, "Taskfile error\n"); | |
724 | ||
725 | port = dd->port; | |
726 | ||
727 | /* Stop the timer to prevent command timeouts. */ | |
728 | del_timer(&port->cmd_timer); | |
729 | ||
730 | /* Set eh_active */ | |
731 | atomic_inc(&dd->eh_active); | |
732 | ||
733 | /* Loop through all the groups */ | |
734 | for (group = 0; group < dd->slot_groups; group++) { | |
735 | completed = readl(port->completed[group]); | |
736 | ||
737 | /* clear completed status register in the hardware.*/ | |
738 | writel(completed, port->completed[group]); | |
739 | ||
740 | /* clear the tag accumulator */ | |
741 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); | |
742 | ||
743 | /* Process successfully completed commands */ | |
744 | for (bit = 0; bit < 32 && completed; bit++) { | |
745 | if (!(completed & (1<<bit))) | |
746 | continue; | |
747 | tag = (group << 5) + bit; | |
748 | ||
749 | /* Skip the internal command slot */ | |
750 | if (tag == MTIP_TAG_INTERNAL) | |
751 | continue; | |
752 | ||
753 | command = &port->commands[tag]; | |
754 | if (likely(command->comp_func)) { | |
755 | set_bit(tag, tagaccum); | |
756 | atomic_set(&port->commands[tag].active, 0); | |
757 | command->comp_func(port, | |
758 | tag, | |
759 | command->comp_data, | |
760 | 0); | |
761 | } else { | |
762 | dev_err(&port->dd->pdev->dev, | |
763 | "Missing completion func for tag %d", | |
764 | tag); | |
765 | if (mtip_check_surprise_removal(dd->pdev)) { | |
766 | mtip_command_cleanup(dd); | |
767 | /* don't proceed further */ | |
768 | return; | |
769 | } | |
770 | } | |
771 | } | |
772 | } | |
773 | print_tags(dd, "TFE tags completed:", tagaccum); | |
774 | ||
775 | /* Restart the port */ | |
776 | mdelay(20); | |
777 | mtip_restart_port(port); | |
778 | ||
779 | /* clear the tag accumulator */ | |
780 | memset(tagaccum, 0, SLOTBITS_IN_LONGS * sizeof(long)); | |
781 | ||
782 | /* Loop through all the groups */ | |
783 | for (group = 0; group < dd->slot_groups; group++) { | |
784 | for (bit = 0; bit < 32; bit++) { | |
785 | reissue = 1; | |
786 | tag = (group << 5) + bit; | |
787 | ||
788 | /* If the active bit is set re-issue the command */ | |
789 | if (atomic_read(&port->commands[tag].active) == 0) | |
790 | continue; | |
791 | ||
792 | fis = (struct host_to_dev_fis *) | |
793 | port->commands[tag].command; | |
794 | ||
795 | /* Should re-issue? */ | |
796 | if (tag == MTIP_TAG_INTERNAL || | |
797 | fis->command == ATA_CMD_SET_FEATURES) | |
798 | reissue = 0; | |
799 | ||
800 | /* | |
801 | * First check if this command has | |
802 | * exceeded its retries. | |
803 | */ | |
804 | if (reissue && | |
805 | (port->commands[tag].retries-- > 0)) { | |
806 | ||
807 | set_bit(tag, tagaccum); | |
808 | ||
809 | /* Update the timeout value. */ | |
810 | port->commands[tag].comp_time = | |
811 | jiffies + msecs_to_jiffies( | |
812 | MTIP_NCQ_COMMAND_TIMEOUT_MS); | |
813 | /* Re-issue the command. */ | |
814 | mtip_issue_ncq_command(port, tag); | |
815 | ||
816 | continue; | |
817 | } | |
818 | ||
819 | /* Retire a command that will not be reissued */ | |
820 | dev_warn(&port->dd->pdev->dev, | |
821 | "retiring tag %d\n", tag); | |
822 | atomic_set(&port->commands[tag].active, 0); | |
823 | ||
824 | if (port->commands[tag].comp_func) | |
825 | port->commands[tag].comp_func( | |
826 | port, | |
827 | tag, | |
828 | port->commands[tag].comp_data, | |
829 | PORT_IRQ_TF_ERR); | |
830 | else | |
831 | dev_warn(&port->dd->pdev->dev, | |
832 | "Bad completion for tag %d\n", | |
833 | tag); | |
834 | } | |
835 | } | |
836 | print_tags(dd, "TFE tags reissued:", tagaccum); | |
837 | ||
838 | /* Decrement eh_active */ | |
839 | atomic_dec(&dd->eh_active); | |
840 | ||
841 | mod_timer(&port->cmd_timer, | |
842 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); | |
843 | } | |
844 | ||
845 | /* | |
846 | * Handle a set device bits interrupt | |
847 | */ | |
848 | static inline void mtip_process_sdbf(struct driver_data *dd) | |
849 | { | |
850 | struct mtip_port *port = dd->port; | |
851 | int group, tag, bit; | |
852 | u32 completed; | |
853 | struct mtip_cmd *command; | |
854 | ||
855 | /* walk all bits in all slot groups */ | |
856 | for (group = 0; group < dd->slot_groups; group++) { | |
857 | completed = readl(port->completed[group]); | |
858 | ||
859 | /* clear completed status register in the hardware.*/ | |
860 | writel(completed, port->completed[group]); | |
861 | ||
862 | /* Process completed commands. */ | |
863 | for (bit = 0; | |
864 | (bit < 32) && completed; | |
865 | bit++, completed >>= 1) { | |
866 | if (completed & 0x01) { | |
867 | tag = (group << 5) | bit; | |
868 | ||
869 | /* skip internal command slot. */ | |
870 | if (unlikely(tag == MTIP_TAG_INTERNAL)) | |
871 | continue; | |
872 | ||
873 | command = &port->commands[tag]; | |
874 | ||
875 | /* make internal callback */ | |
876 | if (likely(command->comp_func)) { | |
877 | command->comp_func( | |
878 | port, | |
879 | tag, | |
880 | command->comp_data, | |
881 | 0); | |
882 | } else { | |
883 | dev_warn(&dd->pdev->dev, | |
884 | "Null completion " | |
885 | "for tag %d", | |
886 | tag); | |
887 | ||
888 | if (mtip_check_surprise_removal( | |
889 | dd->pdev)) { | |
890 | mtip_command_cleanup(dd); | |
891 | return; | |
892 | } | |
893 | } | |
894 | } | |
895 | } | |
896 | } | |
897 | } | |
898 | ||
899 | /* | |
900 | * Process legacy pio and d2h interrupts | |
901 | */ | |
902 | static inline void mtip_process_legacy(struct driver_data *dd, u32 port_stat) | |
903 | { | |
904 | struct mtip_port *port = dd->port; | |
905 | struct mtip_cmd *cmd = &port->commands[MTIP_TAG_INTERNAL]; | |
906 | ||
907 | if (port->internal_cmd_in_progress && | |
908 | cmd != NULL && | |
909 | !(readl(port->cmd_issue[MTIP_TAG_INTERNAL]) | |
910 | & (1 << MTIP_TAG_INTERNAL))) { | |
911 | if (cmd->comp_func) { | |
912 | cmd->comp_func(port, | |
913 | MTIP_TAG_INTERNAL, | |
914 | cmd->comp_data, | |
915 | 0); | |
916 | return; | |
917 | } | |
918 | } | |
919 | ||
920 | dev_warn(&dd->pdev->dev, "IRQ status 0x%x ignored.\n", port_stat); | |
921 | ||
922 | return; | |
923 | } | |
924 | ||
925 | /* | |
926 | * Demux and handle errors | |
927 | */ | |
928 | static inline void mtip_process_errors(struct driver_data *dd, u32 port_stat) | |
929 | { | |
930 | if (likely(port_stat & (PORT_IRQ_TF_ERR | PORT_IRQ_IF_ERR))) | |
931 | mtip_handle_tfe(dd); | |
932 | ||
933 | if (unlikely(port_stat & PORT_IRQ_CONNECT)) { | |
934 | dev_warn(&dd->pdev->dev, | |
935 | "Clearing PxSERR.DIAG.x\n"); | |
936 | writel((1 << 26), dd->port->mmio + PORT_SCR_ERR); | |
937 | } | |
938 | ||
939 | if (unlikely(port_stat & PORT_IRQ_PHYRDY)) { | |
940 | dev_warn(&dd->pdev->dev, | |
941 | "Clearing PxSERR.DIAG.n\n"); | |
942 | writel((1 << 16), dd->port->mmio + PORT_SCR_ERR); | |
943 | } | |
944 | ||
945 | if (unlikely(port_stat & ~PORT_IRQ_HANDLED)) { | |
946 | dev_warn(&dd->pdev->dev, | |
947 | "Port stat errors %x unhandled\n", | |
948 | (port_stat & ~PORT_IRQ_HANDLED)); | |
949 | } | |
950 | } | |
951 | ||
952 | static inline irqreturn_t mtip_handle_irq(struct driver_data *data) | |
953 | { | |
954 | struct driver_data *dd = (struct driver_data *) data; | |
955 | struct mtip_port *port = dd->port; | |
956 | u32 hba_stat, port_stat; | |
957 | int rv = IRQ_NONE; | |
958 | ||
959 | hba_stat = readl(dd->mmio + HOST_IRQ_STAT); | |
960 | if (hba_stat) { | |
961 | rv = IRQ_HANDLED; | |
962 | ||
963 | /* Acknowledge the interrupt status on the port.*/ | |
964 | port_stat = readl(port->mmio + PORT_IRQ_STAT); | |
965 | writel(port_stat, port->mmio + PORT_IRQ_STAT); | |
966 | ||
967 | /* Demux port status */ | |
968 | if (likely(port_stat & PORT_IRQ_SDB_FIS)) | |
969 | mtip_process_sdbf(dd); | |
970 | ||
971 | if (unlikely(port_stat & PORT_IRQ_ERR)) { | |
972 | if (unlikely(mtip_check_surprise_removal(dd->pdev))) { | |
973 | mtip_command_cleanup(dd); | |
974 | /* don't proceed further */ | |
975 | return IRQ_HANDLED; | |
976 | } | |
977 | ||
978 | mtip_process_errors(dd, port_stat & PORT_IRQ_ERR); | |
979 | } | |
980 | ||
981 | if (unlikely(port_stat & PORT_IRQ_LEGACY)) | |
982 | mtip_process_legacy(dd, port_stat & PORT_IRQ_LEGACY); | |
983 | } | |
984 | ||
985 | /* acknowledge interrupt */ | |
986 | writel(hba_stat, dd->mmio + HOST_IRQ_STAT); | |
987 | ||
988 | return rv; | |
989 | } | |
990 | ||
991 | /* | |
992 | * Wrapper for mtip_handle_irq | |
993 | * (ignores return code) | |
994 | */ | |
995 | static void mtip_tasklet(unsigned long data) | |
996 | { | |
997 | mtip_handle_irq((struct driver_data *) data); | |
998 | } | |
999 | ||
1000 | /* | |
1001 | * HBA interrupt subroutine. | |
1002 | * | |
1003 | * @irq IRQ number. | |
1004 | * @instance Pointer to the driver data structure. | |
1005 | * | |
1006 | * return value | |
1007 | * IRQ_HANDLED A HBA interrupt was pending and handled. | |
1008 | * IRQ_NONE This interrupt was not for the HBA. | |
1009 | */ | |
1010 | static irqreturn_t mtip_irq_handler(int irq, void *instance) | |
1011 | { | |
1012 | struct driver_data *dd = instance; | |
1013 | tasklet_schedule(&dd->tasklet); | |
1014 | return IRQ_HANDLED; | |
1015 | } | |
1016 | ||
1017 | static void mtip_issue_non_ncq_command(struct mtip_port *port, int tag) | |
1018 | { | |
1019 | atomic_set(&port->commands[tag].active, 1); | |
1020 | writel(1 << MTIP_TAG_BIT(tag), | |
1021 | port->cmd_issue[MTIP_TAG_INDEX(tag)]); | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | * Wait for port to quiesce | |
1026 | * | |
1027 | * @port Pointer to port data structure | |
1028 | * @timeout Max duration to wait (ms) | |
1029 | * | |
1030 | * return value | |
1031 | * 0 Success | |
1032 | * -EBUSY Commands still active | |
1033 | */ | |
1034 | static int mtip_quiesce_io(struct mtip_port *port, unsigned long timeout) | |
1035 | { | |
1036 | unsigned long to; | |
1037 | unsigned int n, active; | |
1038 | ||
1039 | to = jiffies + msecs_to_jiffies(timeout); | |
1040 | do { | |
1041 | /* | |
1042 | * Ignore s_active bit 0 of array element 0. | |
1043 | * This bit will always be set | |
1044 | */ | |
1045 | active = readl(port->s_active[0]) & 0xfffffffe; | |
1046 | for (n = 1; n < port->dd->slot_groups; n++) | |
1047 | active |= readl(port->s_active[n]); | |
1048 | ||
1049 | if (!active) | |
1050 | break; | |
1051 | ||
1052 | msleep(20); | |
1053 | } while (time_before(jiffies, to)); | |
1054 | ||
1055 | return active ? -EBUSY : 0; | |
1056 | } | |
1057 | ||
1058 | /* | |
1059 | * Execute an internal command and wait for the completion. | |
1060 | * | |
1061 | * @port Pointer to the port data structure. | |
1062 | * @fis Pointer to the FIS that describes the command. | |
1063 | * @fisLen Length in WORDS of the FIS. | |
1064 | * @buffer DMA accessible for command data. | |
1065 | * @bufLen Length, in bytes, of the data buffer. | |
1066 | * @opts Command header options, excluding the FIS length | |
1067 | * and the number of PRD entries. | |
1068 | * @timeout Time in ms to wait for the command to complete. | |
1069 | * | |
1070 | * return value | |
1071 | * 0 Command completed successfully. | |
1072 | * -EFAULT The buffer address is not correctly aligned. | |
1073 | * -EBUSY Internal command or other IO in progress. | |
1074 | * -EAGAIN Time out waiting for command to complete. | |
1075 | */ | |
1076 | static int mtip_exec_internal_command(struct mtip_port *port, | |
1077 | void *fis, | |
1078 | int fisLen, | |
1079 | dma_addr_t buffer, | |
1080 | int bufLen, | |
1081 | u32 opts, | |
1082 | gfp_t atomic, | |
1083 | unsigned long timeout) | |
1084 | { | |
1085 | struct mtip_cmd_sg *command_sg; | |
1086 | DECLARE_COMPLETION_ONSTACK(wait); | |
1087 | int rv = 0; | |
1088 | struct mtip_cmd *int_cmd = &port->commands[MTIP_TAG_INTERNAL]; | |
1089 | ||
1090 | /* Make sure the buffer is 8 byte aligned. This is asic specific. */ | |
1091 | if (buffer & 0x00000007) { | |
1092 | dev_err(&port->dd->pdev->dev, | |
1093 | "SG buffer is not 8 byte aligned\n"); | |
1094 | return -EFAULT; | |
1095 | } | |
1096 | ||
1097 | /* Only one internal command should be running at a time */ | |
1098 | if (test_and_set_bit(MTIP_TAG_INTERNAL, port->allocated)) { | |
1099 | dev_warn(&port->dd->pdev->dev, | |
1100 | "Internal command already active\n"); | |
1101 | return -EBUSY; | |
1102 | } | |
1103 | port->internal_cmd_in_progress = 1; | |
1104 | ||
1105 | if (atomic == GFP_KERNEL) { | |
1106 | /* wait for io to complete if non atomic */ | |
1107 | if (mtip_quiesce_io(port, 5000) < 0) { | |
1108 | dev_warn(&port->dd->pdev->dev, | |
1109 | "Failed to quiesce IO\n"); | |
1110 | release_slot(port, MTIP_TAG_INTERNAL); | |
1111 | port->internal_cmd_in_progress = 0; | |
1112 | return -EBUSY; | |
1113 | } | |
1114 | ||
1115 | /* Set the completion function and data for the command. */ | |
1116 | int_cmd->comp_data = &wait; | |
1117 | int_cmd->comp_func = mtip_completion; | |
1118 | ||
1119 | } else { | |
1120 | /* Clear completion - we're going to poll */ | |
1121 | int_cmd->comp_data = NULL; | |
1122 | int_cmd->comp_func = NULL; | |
1123 | } | |
1124 | ||
1125 | /* Copy the command to the command table */ | |
1126 | memcpy(int_cmd->command, fis, fisLen*4); | |
1127 | ||
1128 | /* Populate the SG list */ | |
1129 | int_cmd->command_header->opts = | |
1130 | cpu_to_le32(opts | fisLen); | |
1131 | if (bufLen) { | |
1132 | command_sg = int_cmd->command + AHCI_CMD_TBL_HDR_SZ; | |
1133 | ||
1134 | command_sg->info = cpu_to_le32((bufLen-1) & 0x3fffff); | |
1135 | command_sg->dba = cpu_to_le32(buffer & 0xffffffff); | |
1136 | command_sg->dba_upper = cpu_to_le32((buffer >> 16) >> 16); | |
1137 | ||
1138 | int_cmd->command_header->opts |= cpu_to_le32((1 << 16)); | |
1139 | } | |
1140 | ||
1141 | /* Populate the command header */ | |
1142 | int_cmd->command_header->byte_count = 0; | |
1143 | ||
1144 | /* Issue the command to the hardware */ | |
1145 | mtip_issue_non_ncq_command(port, MTIP_TAG_INTERNAL); | |
1146 | ||
1147 | /* Poll if atomic, wait_for_completion otherwise */ | |
1148 | if (atomic == GFP_KERNEL) { | |
1149 | /* Wait for the command to complete or timeout. */ | |
1150 | if (wait_for_completion_timeout( | |
1151 | &wait, | |
1152 | msecs_to_jiffies(timeout)) == 0) { | |
1153 | dev_err(&port->dd->pdev->dev, | |
1154 | "Internal command did not complete [%d]\n", | |
1155 | atomic); | |
1156 | rv = -EAGAIN; | |
1157 | } | |
1158 | ||
1159 | if (readl(port->cmd_issue[MTIP_TAG_INTERNAL]) | |
1160 | & (1 << MTIP_TAG_INTERNAL)) { | |
1161 | dev_warn(&port->dd->pdev->dev, | |
1162 | "Retiring internal command but CI is 1.\n"); | |
1163 | } | |
1164 | ||
1165 | } else { | |
1166 | /* Spin for <timeout> checking if command still outstanding */ | |
1167 | timeout = jiffies + msecs_to_jiffies(timeout); | |
1168 | ||
1169 | while ((readl( | |
1170 | port->cmd_issue[MTIP_TAG_INTERNAL]) | |
1171 | & (1 << MTIP_TAG_INTERNAL)) | |
1172 | && time_before(jiffies, timeout)) | |
1173 | ; | |
1174 | ||
1175 | if (readl(port->cmd_issue[MTIP_TAG_INTERNAL]) | |
1176 | & (1 << MTIP_TAG_INTERNAL)) { | |
1177 | dev_err(&port->dd->pdev->dev, | |
1178 | "Internal command did not complete [%d]\n", | |
1179 | atomic); | |
1180 | rv = -EAGAIN; | |
1181 | } | |
1182 | } | |
1183 | ||
1184 | /* Clear the allocated and active bits for the internal command. */ | |
1185 | atomic_set(&int_cmd->active, 0); | |
1186 | release_slot(port, MTIP_TAG_INTERNAL); | |
1187 | port->internal_cmd_in_progress = 0; | |
1188 | ||
1189 | return rv; | |
1190 | } | |
1191 | ||
1192 | /* | |
1193 | * Byte-swap ATA ID strings. | |
1194 | * | |
1195 | * ATA identify data contains strings in byte-swapped 16-bit words. | |
1196 | * They must be swapped (on all architectures) to be usable as C strings. | |
1197 | * This function swaps bytes in-place. | |
1198 | * | |
1199 | * @buf The buffer location of the string | |
1200 | * @len The number of bytes to swap | |
1201 | * | |
1202 | * return value | |
1203 | * None | |
1204 | */ | |
1205 | static inline void ata_swap_string(u16 *buf, unsigned int len) | |
1206 | { | |
1207 | int i; | |
1208 | for (i = 0; i < (len/2); i++) | |
1209 | be16_to_cpus(&buf[i]); | |
1210 | } | |
1211 | ||
1212 | /* | |
1213 | * Request the device identity information. | |
1214 | * | |
1215 | * If a user space buffer is not specified, i.e. is NULL, the | |
1216 | * identify information is still read from the drive and placed | |
1217 | * into the identify data buffer (@e port->identify) in the | |
1218 | * port data structure. | |
1219 | * When the identify buffer contains valid identify information @e | |
1220 | * port->identify_valid is non-zero. | |
1221 | * | |
1222 | * @port Pointer to the port structure. | |
1223 | * @user_buffer A user space buffer where the identify data should be | |
1224 | * copied. | |
1225 | * | |
1226 | * return value | |
1227 | * 0 Command completed successfully. | |
1228 | * -EFAULT An error occurred while coping data to the user buffer. | |
1229 | * -1 Command failed. | |
1230 | */ | |
1231 | static int mtip_get_identify(struct mtip_port *port, void __user *user_buffer) | |
1232 | { | |
1233 | int rv = 0; | |
1234 | struct host_to_dev_fis fis; | |
1235 | ||
1236 | down_write(&port->dd->internal_sem); | |
1237 | ||
1238 | /* Build the FIS. */ | |
1239 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1240 | fis.type = 0x27; | |
1241 | fis.opts = 1 << 7; | |
1242 | fis.command = ATA_CMD_ID_ATA; | |
1243 | ||
1244 | /* Set the identify information as invalid. */ | |
1245 | port->identify_valid = 0; | |
1246 | ||
1247 | /* Clear the identify information. */ | |
1248 | memset(port->identify, 0, sizeof(u16) * ATA_ID_WORDS); | |
1249 | ||
1250 | /* Execute the command. */ | |
1251 | if (mtip_exec_internal_command(port, | |
1252 | &fis, | |
1253 | 5, | |
1254 | port->identify_dma, | |
1255 | sizeof(u16) * ATA_ID_WORDS, | |
1256 | 0, | |
1257 | GFP_KERNEL, | |
1258 | MTIP_INTERNAL_COMMAND_TIMEOUT_MS) | |
1259 | < 0) { | |
1260 | rv = -1; | |
1261 | goto out; | |
1262 | } | |
1263 | ||
1264 | /* | |
1265 | * Perform any necessary byte-swapping. Yes, the kernel does in fact | |
1266 | * perform field-sensitive swapping on the string fields. | |
1267 | * See the kernel use of ata_id_string() for proof of this. | |
1268 | */ | |
1269 | #ifdef __LITTLE_ENDIAN | |
1270 | ata_swap_string(port->identify + 27, 40); /* model string*/ | |
1271 | ata_swap_string(port->identify + 23, 8); /* firmware string*/ | |
1272 | ata_swap_string(port->identify + 10, 20); /* serial# string*/ | |
1273 | #else | |
1274 | { | |
1275 | int i; | |
1276 | for (i = 0; i < ATA_ID_WORDS; i++) | |
1277 | port->identify[i] = le16_to_cpu(port->identify[i]); | |
1278 | } | |
1279 | #endif | |
1280 | ||
1281 | /* Set the identify buffer as valid. */ | |
1282 | port->identify_valid = 1; | |
1283 | ||
1284 | if (user_buffer) { | |
1285 | if (copy_to_user( | |
1286 | user_buffer, | |
1287 | port->identify, | |
1288 | ATA_ID_WORDS * sizeof(u16))) { | |
1289 | rv = -EFAULT; | |
1290 | goto out; | |
1291 | } | |
1292 | } | |
1293 | ||
1294 | out: | |
1295 | up_write(&port->dd->internal_sem); | |
1296 | return rv; | |
1297 | } | |
1298 | ||
1299 | /* | |
1300 | * Issue a standby immediate command to the device. | |
1301 | * | |
1302 | * @port Pointer to the port structure. | |
1303 | * | |
1304 | * return value | |
1305 | * 0 Command was executed successfully. | |
1306 | * -1 An error occurred while executing the command. | |
1307 | */ | |
1308 | static int mtip_standby_immediate(struct mtip_port *port) | |
1309 | { | |
1310 | int rv; | |
1311 | struct host_to_dev_fis fis; | |
1312 | ||
1313 | down_write(&port->dd->internal_sem); | |
1314 | ||
1315 | /* Build the FIS. */ | |
1316 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1317 | fis.type = 0x27; | |
1318 | fis.opts = 1 << 7; | |
1319 | fis.command = ATA_CMD_STANDBYNOW1; | |
1320 | ||
1321 | /* Execute the command. Use a 15-second timeout for large drives. */ | |
1322 | rv = mtip_exec_internal_command(port, | |
1323 | &fis, | |
1324 | 5, | |
1325 | 0, | |
1326 | 0, | |
1327 | 0, | |
1328 | GFP_KERNEL, | |
1329 | 15000); | |
1330 | ||
1331 | up_write(&port->dd->internal_sem); | |
1332 | ||
1333 | return rv; | |
1334 | } | |
1335 | ||
1336 | /* | |
1337 | * Get the drive capacity. | |
1338 | * | |
1339 | * @dd Pointer to the device data structure. | |
1340 | * @sectors Pointer to the variable that will receive the sector count. | |
1341 | * | |
1342 | * return value | |
1343 | * 1 Capacity was returned successfully. | |
1344 | * 0 The identify information is invalid. | |
1345 | */ | |
6316668f | 1346 | static bool mtip_hw_get_capacity(struct driver_data *dd, sector_t *sectors) |
88523a61 SB |
1347 | { |
1348 | struct mtip_port *port = dd->port; | |
1349 | u64 total, raw0, raw1, raw2, raw3; | |
1350 | raw0 = port->identify[100]; | |
1351 | raw1 = port->identify[101]; | |
1352 | raw2 = port->identify[102]; | |
1353 | raw3 = port->identify[103]; | |
1354 | total = raw0 | raw1<<16 | raw2<<32 | raw3<<48; | |
1355 | *sectors = total; | |
1356 | return (bool) !!port->identify_valid; | |
1357 | } | |
1358 | ||
1359 | /* | |
1360 | * Reset the HBA. | |
1361 | * | |
1362 | * Resets the HBA by setting the HBA Reset bit in the Global | |
1363 | * HBA Control register. After setting the HBA Reset bit the | |
1364 | * function waits for 1 second before reading the HBA Reset | |
1365 | * bit to make sure it has cleared. If HBA Reset is not clear | |
1366 | * an error is returned. Cannot be used in non-blockable | |
1367 | * context. | |
1368 | * | |
1369 | * @dd Pointer to the driver data structure. | |
1370 | * | |
1371 | * return value | |
1372 | * 0 The reset was successful. | |
1373 | * -1 The HBA Reset bit did not clear. | |
1374 | */ | |
1375 | static int mtip_hba_reset(struct driver_data *dd) | |
1376 | { | |
1377 | mtip_deinit_port(dd->port); | |
1378 | ||
1379 | /* Set the reset bit */ | |
1380 | writel(HOST_RESET, dd->mmio + HOST_CTL); | |
1381 | ||
1382 | /* Flush */ | |
1383 | readl(dd->mmio + HOST_CTL); | |
1384 | ||
1385 | /* Wait for reset to clear */ | |
1386 | ssleep(1); | |
1387 | ||
1388 | /* Check the bit has cleared */ | |
1389 | if (readl(dd->mmio + HOST_CTL) & HOST_RESET) { | |
1390 | dev_err(&dd->pdev->dev, | |
1391 | "Reset bit did not clear.\n"); | |
1392 | return -1; | |
1393 | } | |
1394 | ||
1395 | return 0; | |
1396 | } | |
1397 | ||
1398 | /* | |
1399 | * Display the identify command data. | |
1400 | * | |
1401 | * @port Pointer to the port data structure. | |
1402 | * | |
1403 | * return value | |
1404 | * None | |
1405 | */ | |
1406 | static void mtip_dump_identify(struct mtip_port *port) | |
1407 | { | |
1408 | sector_t sectors; | |
1409 | unsigned short revid; | |
1410 | char cbuf[42]; | |
1411 | ||
1412 | if (!port->identify_valid) | |
1413 | return; | |
1414 | ||
1415 | strlcpy(cbuf, (char *)(port->identify+10), 21); | |
1416 | dev_info(&port->dd->pdev->dev, | |
1417 | "Serial No.: %s\n", cbuf); | |
1418 | ||
1419 | strlcpy(cbuf, (char *)(port->identify+23), 9); | |
1420 | dev_info(&port->dd->pdev->dev, | |
1421 | "Firmware Ver.: %s\n", cbuf); | |
1422 | ||
1423 | strlcpy(cbuf, (char *)(port->identify+27), 41); | |
1424 | dev_info(&port->dd->pdev->dev, "Model: %s\n", cbuf); | |
1425 | ||
1426 | if (mtip_hw_get_capacity(port->dd, §ors)) | |
1427 | dev_info(&port->dd->pdev->dev, | |
1428 | "Capacity: %llu sectors (%llu MB)\n", | |
1429 | (u64)sectors, | |
1430 | ((u64)sectors) * ATA_SECT_SIZE >> 20); | |
1431 | ||
1432 | pci_read_config_word(port->dd->pdev, PCI_REVISION_ID, &revid); | |
1433 | switch (revid & 0xff) { | |
1434 | case 0x1: | |
1435 | strlcpy(cbuf, "A0", 3); | |
1436 | break; | |
1437 | case 0x3: | |
1438 | strlcpy(cbuf, "A2", 3); | |
1439 | break; | |
1440 | default: | |
1441 | strlcpy(cbuf, "?", 2); | |
1442 | break; | |
1443 | } | |
1444 | dev_info(&port->dd->pdev->dev, | |
1445 | "Card Type: %s\n", cbuf); | |
1446 | } | |
1447 | ||
1448 | /* | |
1449 | * Map the commands scatter list into the command table. | |
1450 | * | |
1451 | * @command Pointer to the command. | |
1452 | * @nents Number of scatter list entries. | |
1453 | * | |
1454 | * return value | |
1455 | * None | |
1456 | */ | |
1457 | static inline void fill_command_sg(struct driver_data *dd, | |
1458 | struct mtip_cmd *command, | |
1459 | int nents) | |
1460 | { | |
1461 | int n; | |
1462 | unsigned int dma_len; | |
1463 | struct mtip_cmd_sg *command_sg; | |
1464 | struct scatterlist *sg = command->sg; | |
1465 | ||
1466 | command_sg = command->command + AHCI_CMD_TBL_HDR_SZ; | |
1467 | ||
1468 | for (n = 0; n < nents; n++) { | |
1469 | dma_len = sg_dma_len(sg); | |
1470 | if (dma_len > 0x400000) | |
1471 | dev_err(&dd->pdev->dev, | |
1472 | "DMA segment length truncated\n"); | |
1473 | command_sg->info = cpu_to_le32((dma_len-1) & 0x3fffff); | |
1474 | #if (BITS_PER_LONG == 64) | |
1475 | *((unsigned long *) &command_sg->dba) = | |
1476 | cpu_to_le64(sg_dma_address(sg)); | |
1477 | #else | |
1478 | command_sg->dba = cpu_to_le32(sg_dma_address(sg)); | |
1479 | command_sg->dba_upper = | |
1480 | cpu_to_le32((sg_dma_address(sg) >> 16) >> 16); | |
1481 | #endif | |
1482 | command_sg++; | |
1483 | sg++; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | /* | |
1488 | * @brief Execute a drive command. | |
1489 | * | |
1490 | * return value 0 The command completed successfully. | |
1491 | * return value -1 An error occurred while executing the command. | |
1492 | */ | |
6316668f | 1493 | static int exec_drive_task(struct mtip_port *port, u8 *command) |
88523a61 SB |
1494 | { |
1495 | struct host_to_dev_fis fis; | |
1496 | struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG); | |
1497 | ||
1498 | /* Lock the internal command semaphore. */ | |
1499 | down_write(&port->dd->internal_sem); | |
1500 | ||
1501 | /* Build the FIS. */ | |
1502 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1503 | fis.type = 0x27; | |
1504 | fis.opts = 1 << 7; | |
1505 | fis.command = command[0]; | |
1506 | fis.features = command[1]; | |
1507 | fis.sect_count = command[2]; | |
1508 | fis.sector = command[3]; | |
1509 | fis.cyl_low = command[4]; | |
1510 | fis.cyl_hi = command[5]; | |
1511 | fis.device = command[6] & ~0x10; /* Clear the dev bit*/ | |
1512 | ||
1513 | ||
1514 | dbg_printk(MTIP_DRV_NAME "%s: User Command: cmd %x, feat %x, " | |
1515 | "nsect %x, sect %x, lcyl %x, " | |
1516 | "hcyl %x, sel %x\n", | |
1517 | __func__, | |
1518 | command[0], | |
1519 | command[1], | |
1520 | command[2], | |
1521 | command[3], | |
1522 | command[4], | |
1523 | command[5], | |
1524 | command[6]); | |
1525 | ||
1526 | /* Execute the command. */ | |
1527 | if (mtip_exec_internal_command(port, | |
1528 | &fis, | |
1529 | 5, | |
1530 | 0, | |
1531 | 0, | |
1532 | 0, | |
1533 | GFP_KERNEL, | |
1534 | MTIP_IOCTL_COMMAND_TIMEOUT_MS) < 0) { | |
1535 | up_write(&port->dd->internal_sem); | |
1536 | return -1; | |
1537 | } | |
1538 | ||
1539 | command[0] = reply->command; /* Status*/ | |
1540 | command[1] = reply->features; /* Error*/ | |
1541 | command[4] = reply->cyl_low; | |
1542 | command[5] = reply->cyl_hi; | |
1543 | ||
1544 | dbg_printk(MTIP_DRV_NAME "%s: Completion Status: stat %x, " | |
1545 | "err %x , cyl_lo %x cyl_hi %x\n", | |
1546 | __func__, | |
1547 | command[0], | |
1548 | command[1], | |
1549 | command[4], | |
1550 | command[5]); | |
1551 | ||
1552 | up_write(&port->dd->internal_sem); | |
1553 | return 0; | |
1554 | } | |
1555 | ||
1556 | /* | |
1557 | * @brief Execute a drive command. | |
1558 | * | |
1559 | * @param port Pointer to the port data structure. | |
1560 | * @param command Pointer to the user specified command parameters. | |
1561 | * @param user_buffer Pointer to the user space buffer where read sector | |
1562 | * data should be copied. | |
1563 | * | |
1564 | * return value 0 The command completed successfully. | |
1565 | * return value -EFAULT An error occurred while copying the completion | |
1566 | * data to the user space buffer. | |
1567 | * return value -1 An error occurred while executing the command. | |
1568 | */ | |
6316668f JA |
1569 | static int exec_drive_command(struct mtip_port *port, u8 *command, |
1570 | void __user *user_buffer) | |
88523a61 SB |
1571 | { |
1572 | struct host_to_dev_fis fis; | |
1573 | struct host_to_dev_fis *reply = (port->rxfis + RX_FIS_D2H_REG); | |
1574 | ||
1575 | /* Lock the internal command semaphore. */ | |
1576 | down_write(&port->dd->internal_sem); | |
1577 | ||
1578 | /* Build the FIS. */ | |
1579 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1580 | fis.type = 0x27; | |
1581 | fis.opts = 1 << 7; | |
1582 | fis.command = command[0]; | |
1583 | fis.features = command[2]; | |
1584 | fis.sect_count = command[3]; | |
1585 | if (fis.command == ATA_CMD_SMART) { | |
1586 | fis.sector = command[1]; | |
1587 | fis.cyl_low = 0x4f; | |
1588 | fis.cyl_hi = 0xc2; | |
1589 | } | |
1590 | ||
1591 | dbg_printk(MTIP_DRV_NAME | |
1592 | "%s: User Command: cmd %x, sect %x, " | |
1593 | "feat %x, sectcnt %x\n", | |
1594 | __func__, | |
1595 | command[0], | |
1596 | command[1], | |
1597 | command[2], | |
1598 | command[3]); | |
1599 | ||
1600 | memset(port->sector_buffer, 0x00, ATA_SECT_SIZE); | |
1601 | ||
1602 | /* Execute the command. */ | |
1603 | if (mtip_exec_internal_command(port, | |
1604 | &fis, | |
1605 | 5, | |
1606 | port->sector_buffer_dma, | |
1607 | (command[3] != 0) ? ATA_SECT_SIZE : 0, | |
1608 | 0, | |
1609 | GFP_KERNEL, | |
1610 | MTIP_IOCTL_COMMAND_TIMEOUT_MS) | |
1611 | < 0) { | |
1612 | up_write(&port->dd->internal_sem); | |
1613 | return -1; | |
1614 | } | |
1615 | ||
1616 | /* Collect the completion status. */ | |
1617 | command[0] = reply->command; /* Status*/ | |
1618 | command[1] = reply->features; /* Error*/ | |
1619 | command[2] = command[3]; | |
1620 | ||
1621 | dbg_printk(MTIP_DRV_NAME | |
1622 | "%s: Completion Status: stat %x, " | |
1623 | "err %x, cmd %x\n", | |
1624 | __func__, | |
1625 | command[0], | |
1626 | command[1], | |
1627 | command[2]); | |
1628 | ||
1629 | if (user_buffer && command[3]) { | |
1630 | if (copy_to_user(user_buffer, | |
1631 | port->sector_buffer, | |
1632 | ATA_SECT_SIZE * command[3])) { | |
1633 | up_write(&port->dd->internal_sem); | |
1634 | return -EFAULT; | |
1635 | } | |
1636 | } | |
1637 | ||
1638 | up_write(&port->dd->internal_sem); | |
1639 | return 0; | |
1640 | } | |
1641 | ||
1642 | /* | |
1643 | * Indicates whether a command has a single sector payload. | |
1644 | * | |
1645 | * @command passed to the device to perform the certain event. | |
1646 | * @features passed to the device to perform the certain event. | |
1647 | * | |
1648 | * return value | |
1649 | * 1 command is one that always has a single sector payload, | |
1650 | * regardless of the value in the Sector Count field. | |
1651 | * 0 otherwise | |
1652 | * | |
1653 | */ | |
1654 | static unsigned int implicit_sector(unsigned char command, | |
1655 | unsigned char features) | |
1656 | { | |
1657 | unsigned int rv = 0; | |
1658 | ||
1659 | /* list of commands that have an implicit sector count of 1 */ | |
1660 | switch (command) { | |
1661 | case 0xF1: | |
1662 | case 0xF2: | |
1663 | case 0xF3: | |
1664 | case 0xF4: | |
1665 | case 0xF5: | |
1666 | case 0xF6: | |
1667 | case 0xE4: | |
1668 | case 0xE8: | |
1669 | rv = 1; | |
1670 | break; | |
1671 | case 0xF9: | |
1672 | if (features == 0x03) | |
1673 | rv = 1; | |
1674 | break; | |
1675 | case 0xB0: | |
1676 | if ((features == 0xD0) || (features == 0xD1)) | |
1677 | rv = 1; | |
1678 | break; | |
1679 | case 0xB1: | |
1680 | if ((features == 0xC2) || (features == 0xC3)) | |
1681 | rv = 1; | |
1682 | break; | |
1683 | } | |
1684 | return rv; | |
1685 | } | |
1686 | ||
1687 | /* | |
1688 | * Executes a taskfile | |
1689 | * See ide_taskfile_ioctl() for derivation | |
1690 | */ | |
1691 | static int exec_drive_taskfile(struct driver_data *dd, | |
ef0f1587 JA |
1692 | void __user *buf, |
1693 | ide_task_request_t *req_task, | |
1694 | int outtotal) | |
88523a61 SB |
1695 | { |
1696 | struct host_to_dev_fis fis; | |
1697 | struct host_to_dev_fis *reply; | |
88523a61 SB |
1698 | u8 *outbuf = NULL; |
1699 | u8 *inbuf = NULL; | |
16d02c04 JA |
1700 | dma_addr_t outbuf_dma = 0; |
1701 | dma_addr_t inbuf_dma = 0; | |
1702 | dma_addr_t dma_buffer = 0; | |
88523a61 | 1703 | int err = 0; |
88523a61 SB |
1704 | unsigned int taskin = 0; |
1705 | unsigned int taskout = 0; | |
1706 | u8 nsect = 0; | |
88523a61 SB |
1707 | unsigned int timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS; |
1708 | unsigned int force_single_sector; | |
1709 | unsigned int transfer_size; | |
1710 | unsigned long task_file_data; | |
ef0f1587 | 1711 | int intotal = outtotal + req_task->out_size; |
88523a61 SB |
1712 | |
1713 | taskout = req_task->out_size; | |
1714 | taskin = req_task->in_size; | |
1715 | /* 130560 = 512 * 0xFF*/ | |
1716 | if (taskin > 130560 || taskout > 130560) { | |
1717 | err = -EINVAL; | |
1718 | goto abort; | |
1719 | } | |
1720 | ||
1721 | if (taskout) { | |
1722 | outbuf = kzalloc(taskout, GFP_KERNEL); | |
1723 | if (outbuf == NULL) { | |
1724 | err = -ENOMEM; | |
1725 | goto abort; | |
1726 | } | |
1727 | if (copy_from_user(outbuf, buf + outtotal, taskout)) { | |
1728 | err = -EFAULT; | |
1729 | goto abort; | |
1730 | } | |
1731 | outbuf_dma = pci_map_single(dd->pdev, | |
1732 | outbuf, | |
1733 | taskout, | |
1734 | DMA_TO_DEVICE); | |
16d02c04 | 1735 | if (outbuf_dma == 0) { |
88523a61 SB |
1736 | err = -ENOMEM; |
1737 | goto abort; | |
1738 | } | |
1739 | dma_buffer = outbuf_dma; | |
1740 | } | |
1741 | ||
1742 | if (taskin) { | |
1743 | inbuf = kzalloc(taskin, GFP_KERNEL); | |
1744 | if (inbuf == NULL) { | |
1745 | err = -ENOMEM; | |
1746 | goto abort; | |
1747 | } | |
1748 | ||
1749 | if (copy_from_user(inbuf, buf + intotal, taskin)) { | |
1750 | err = -EFAULT; | |
1751 | goto abort; | |
1752 | } | |
1753 | inbuf_dma = pci_map_single(dd->pdev, | |
1754 | inbuf, | |
1755 | taskin, DMA_FROM_DEVICE); | |
16d02c04 | 1756 | if (inbuf_dma == 0) { |
88523a61 SB |
1757 | err = -ENOMEM; |
1758 | goto abort; | |
1759 | } | |
1760 | dma_buffer = inbuf_dma; | |
1761 | } | |
1762 | ||
1763 | /* only supports PIO and non-data commands from this ioctl. */ | |
1764 | switch (req_task->data_phase) { | |
1765 | case TASKFILE_OUT: | |
1766 | nsect = taskout / ATA_SECT_SIZE; | |
1767 | reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); | |
1768 | break; | |
1769 | case TASKFILE_IN: | |
1770 | reply = (dd->port->rxfis + RX_FIS_PIO_SETUP); | |
1771 | break; | |
1772 | case TASKFILE_NO_DATA: | |
1773 | reply = (dd->port->rxfis + RX_FIS_D2H_REG); | |
1774 | break; | |
1775 | default: | |
1776 | err = -EINVAL; | |
1777 | goto abort; | |
1778 | } | |
1779 | ||
1780 | /* Lock the internal command semaphore. */ | |
1781 | down_write(&dd->internal_sem); | |
1782 | ||
1783 | /* Build the FIS. */ | |
1784 | memset(&fis, 0, sizeof(struct host_to_dev_fis)); | |
1785 | ||
1786 | fis.type = 0x27; | |
1787 | fis.opts = 1 << 7; | |
1788 | fis.command = req_task->io_ports[7]; | |
1789 | fis.features = req_task->io_ports[1]; | |
1790 | fis.sect_count = req_task->io_ports[2]; | |
1791 | fis.lba_low = req_task->io_ports[3]; | |
1792 | fis.lba_mid = req_task->io_ports[4]; | |
1793 | fis.lba_hi = req_task->io_ports[5]; | |
1794 | /* Clear the dev bit*/ | |
1795 | fis.device = req_task->io_ports[6] & ~0x10; | |
1796 | ||
1797 | if ((req_task->in_flags.all == 0) && (req_task->out_flags.all & 1)) { | |
1798 | req_task->in_flags.all = | |
1799 | IDE_TASKFILE_STD_IN_FLAGS | | |
1800 | (IDE_HOB_STD_IN_FLAGS << 8); | |
1801 | fis.lba_low_ex = req_task->hob_ports[3]; | |
1802 | fis.lba_mid_ex = req_task->hob_ports[4]; | |
1803 | fis.lba_hi_ex = req_task->hob_ports[5]; | |
1804 | fis.features_ex = req_task->hob_ports[1]; | |
1805 | fis.sect_cnt_ex = req_task->hob_ports[2]; | |
1806 | ||
1807 | } else { | |
1808 | req_task->in_flags.all = IDE_TASKFILE_STD_IN_FLAGS; | |
1809 | } | |
1810 | ||
1811 | force_single_sector = implicit_sector(fis.command, fis.features); | |
1812 | ||
1813 | if ((taskin || taskout) && (!fis.sect_count)) { | |
1814 | if (nsect) | |
1815 | fis.sect_count = nsect; | |
1816 | else { | |
1817 | if (!force_single_sector) { | |
1818 | dev_warn(&dd->pdev->dev, | |
1819 | "data movement but " | |
1820 | "sect_count is 0\n"); | |
1821 | up_write(&dd->internal_sem); | |
1822 | err = -EINVAL; | |
1823 | goto abort; | |
1824 | } | |
1825 | } | |
1826 | } | |
1827 | ||
1828 | dbg_printk(MTIP_DRV_NAME | |
1829 | "taskfile: cmd %x, feat %x, nsect %x," | |
1830 | " sect/lbal %x, lcyl/lbam %x, hcyl/lbah %x," | |
1831 | " head/dev %x\n", | |
1832 | fis.command, | |
1833 | fis.features, | |
1834 | fis.sect_count, | |
1835 | fis.lba_low, | |
1836 | fis.lba_mid, | |
1837 | fis.lba_hi, | |
1838 | fis.device); | |
1839 | ||
1840 | switch (fis.command) { | |
1841 | case 0x92: /* Change timeout for Download Microcode to 60 seconds.*/ | |
1842 | timeout = 60000; | |
1843 | break; | |
1844 | case 0xf4: /* Change timeout for Security Erase Unit to 4 minutes.*/ | |
1845 | timeout = 240000; | |
1846 | break; | |
1847 | case 0xe0: /* Change timeout for standby immediate to 10 seconds.*/ | |
1848 | timeout = 10000; | |
1849 | break; | |
1850 | case 0xf7: /* Change timeout for vendor unique command to 10 secs */ | |
1851 | timeout = 10000; | |
1852 | break; | |
1853 | case 0xfa: /* Change timeout for vendor unique command to 10 secs */ | |
1854 | timeout = 10000; | |
1855 | break; | |
1856 | default: | |
1857 | timeout = MTIP_IOCTL_COMMAND_TIMEOUT_MS; | |
1858 | break; | |
1859 | } | |
1860 | ||
1861 | /* Determine the correct transfer size.*/ | |
1862 | if (force_single_sector) | |
1863 | transfer_size = ATA_SECT_SIZE; | |
1864 | else | |
1865 | transfer_size = ATA_SECT_SIZE * fis.sect_count; | |
1866 | ||
1867 | /* Execute the command.*/ | |
1868 | if (mtip_exec_internal_command(dd->port, | |
1869 | &fis, | |
1870 | 5, | |
1871 | dma_buffer, | |
1872 | transfer_size, | |
1873 | 0, | |
1874 | GFP_KERNEL, | |
1875 | timeout) < 0) { | |
1876 | up_write(&dd->internal_sem); | |
1877 | err = -EIO; | |
1878 | goto abort; | |
1879 | } | |
1880 | ||
1881 | task_file_data = readl(dd->port->mmio+PORT_TFDATA); | |
1882 | ||
1883 | if ((req_task->data_phase == TASKFILE_IN) && !(task_file_data & 1)) { | |
1884 | reply = dd->port->rxfis + RX_FIS_PIO_SETUP; | |
1885 | req_task->io_ports[7] = reply->control; | |
1886 | } else { | |
1887 | reply = dd->port->rxfis + RX_FIS_D2H_REG; | |
1888 | req_task->io_ports[7] = reply->command; | |
1889 | } | |
1890 | ||
1891 | /* reclaim the DMA buffers.*/ | |
1892 | if (inbuf_dma) | |
1893 | pci_unmap_single(dd->pdev, inbuf_dma, | |
1894 | taskin, DMA_FROM_DEVICE); | |
1895 | if (outbuf_dma) | |
1896 | pci_unmap_single(dd->pdev, outbuf_dma, | |
1897 | taskout, DMA_TO_DEVICE); | |
16d02c04 JA |
1898 | inbuf_dma = 0; |
1899 | outbuf_dma = 0; | |
88523a61 SB |
1900 | |
1901 | /* return the ATA registers to the caller.*/ | |
1902 | req_task->io_ports[1] = reply->features; | |
1903 | req_task->io_ports[2] = reply->sect_count; | |
1904 | req_task->io_ports[3] = reply->lba_low; | |
1905 | req_task->io_ports[4] = reply->lba_mid; | |
1906 | req_task->io_ports[5] = reply->lba_hi; | |
1907 | req_task->io_ports[6] = reply->device; | |
1908 | ||
1909 | if (req_task->out_flags.all & 1) { | |
1910 | ||
1911 | req_task->hob_ports[3] = reply->lba_low_ex; | |
1912 | req_task->hob_ports[4] = reply->lba_mid_ex; | |
1913 | req_task->hob_ports[5] = reply->lba_hi_ex; | |
1914 | req_task->hob_ports[1] = reply->features_ex; | |
1915 | req_task->hob_ports[2] = reply->sect_cnt_ex; | |
1916 | } | |
1917 | ||
1918 | /* Com rest after secure erase or lowlevel format */ | |
1919 | if (((fis.command == 0xF4) || | |
1920 | ((fis.command == 0xFC) && | |
1921 | (fis.features == 0x27 || fis.features == 0x72 || | |
1922 | fis.features == 0x62 || fis.features == 0x26))) && | |
1923 | !(reply->command & 1)) { | |
1924 | mtip_restart_port(dd->port); | |
1925 | } | |
1926 | ||
1927 | dbg_printk(MTIP_DRV_NAME | |
1928 | "%s: Completion: stat %x," | |
1929 | "err %x, sect_cnt %x, lbalo %x," | |
1930 | "lbamid %x, lbahi %x, dev %x\n", | |
1931 | __func__, | |
1932 | req_task->io_ports[7], | |
1933 | req_task->io_ports[1], | |
1934 | req_task->io_ports[2], | |
1935 | req_task->io_ports[3], | |
1936 | req_task->io_ports[4], | |
1937 | req_task->io_ports[5], | |
1938 | req_task->io_ports[6]); | |
1939 | ||
1940 | up_write(&dd->internal_sem); | |
1941 | ||
88523a61 SB |
1942 | if (taskout) { |
1943 | if (copy_to_user(buf + outtotal, outbuf, taskout)) { | |
1944 | err = -EFAULT; | |
1945 | goto abort; | |
1946 | } | |
1947 | } | |
1948 | if (taskin) { | |
1949 | if (copy_to_user(buf + intotal, inbuf, taskin)) { | |
1950 | err = -EFAULT; | |
1951 | goto abort; | |
1952 | } | |
1953 | } | |
1954 | abort: | |
1955 | if (inbuf_dma) | |
1956 | pci_unmap_single(dd->pdev, inbuf_dma, | |
1957 | taskin, DMA_FROM_DEVICE); | |
1958 | if (outbuf_dma) | |
1959 | pci_unmap_single(dd->pdev, outbuf_dma, | |
1960 | taskout, DMA_TO_DEVICE); | |
88523a61 SB |
1961 | kfree(outbuf); |
1962 | kfree(inbuf); | |
1963 | ||
1964 | return err; | |
1965 | } | |
1966 | ||
1967 | /* | |
1968 | * Handle IOCTL calls from the Block Layer. | |
1969 | * | |
1970 | * This function is called by the Block Layer when it receives an IOCTL | |
1971 | * command that it does not understand. If the IOCTL command is not supported | |
1972 | * this function returns -ENOTTY. | |
1973 | * | |
1974 | * @dd Pointer to the driver data structure. | |
1975 | * @cmd IOCTL command passed from the Block Layer. | |
1976 | * @arg IOCTL argument passed from the Block Layer. | |
1977 | * | |
1978 | * return value | |
1979 | * 0 The IOCTL completed successfully. | |
1980 | * -ENOTTY The specified command is not supported. | |
1981 | * -EFAULT An error occurred copying data to a user space buffer. | |
1982 | * -EIO An error occurred while executing the command. | |
1983 | */ | |
ef0f1587 JA |
1984 | static int mtip_hw_ioctl(struct driver_data *dd, unsigned int cmd, |
1985 | unsigned long arg) | |
88523a61 SB |
1986 | { |
1987 | switch (cmd) { | |
1988 | case HDIO_GET_IDENTITY: | |
1989 | if (mtip_get_identify(dd->port, (void __user *) arg) < 0) { | |
1990 | dev_warn(&dd->pdev->dev, | |
1991 | "Unable to read identity\n"); | |
1992 | return -EIO; | |
1993 | } | |
1994 | ||
1995 | break; | |
1996 | case HDIO_DRIVE_CMD: | |
1997 | { | |
1998 | u8 drive_command[4]; | |
1999 | ||
2000 | /* Copy the user command info to our buffer. */ | |
2001 | if (copy_from_user(drive_command, | |
2002 | (void __user *) arg, | |
2003 | sizeof(drive_command))) | |
2004 | return -EFAULT; | |
2005 | ||
2006 | /* Execute the drive command. */ | |
2007 | if (exec_drive_command(dd->port, | |
2008 | drive_command, | |
2009 | (void __user *) (arg+4))) | |
2010 | return -EIO; | |
2011 | ||
2012 | /* Copy the status back to the users buffer. */ | |
2013 | if (copy_to_user((void __user *) arg, | |
2014 | drive_command, | |
2015 | sizeof(drive_command))) | |
2016 | return -EFAULT; | |
2017 | ||
2018 | break; | |
2019 | } | |
2020 | case HDIO_DRIVE_TASK: | |
2021 | { | |
2022 | u8 drive_command[7]; | |
2023 | ||
2024 | /* Copy the user command info to our buffer. */ | |
2025 | if (copy_from_user(drive_command, | |
2026 | (void __user *) arg, | |
2027 | sizeof(drive_command))) | |
2028 | return -EFAULT; | |
2029 | ||
2030 | /* Execute the drive command. */ | |
2031 | if (exec_drive_task(dd->port, drive_command)) | |
2032 | return -EIO; | |
2033 | ||
2034 | /* Copy the status back to the users buffer. */ | |
2035 | if (copy_to_user((void __user *) arg, | |
2036 | drive_command, | |
2037 | sizeof(drive_command))) | |
2038 | return -EFAULT; | |
2039 | ||
2040 | break; | |
2041 | } | |
ef0f1587 JA |
2042 | case HDIO_DRIVE_TASKFILE: { |
2043 | ide_task_request_t req_task; | |
2044 | int ret, outtotal; | |
2045 | ||
2046 | if (copy_from_user(&req_task, (void __user *) arg, | |
2047 | sizeof(req_task))) | |
2048 | return -EFAULT; | |
2049 | ||
2050 | outtotal = sizeof(req_task); | |
2051 | ||
2052 | ret = exec_drive_taskfile(dd, (void __user *) arg, | |
2053 | &req_task, outtotal); | |
2054 | ||
2055 | if (copy_to_user((void __user *) arg, &req_task, sizeof(req_task))) | |
2056 | return -EFAULT; | |
2057 | ||
2058 | return ret; | |
2059 | } | |
88523a61 SB |
2060 | |
2061 | default: | |
2062 | return -EINVAL; | |
2063 | } | |
2064 | return 0; | |
2065 | } | |
2066 | ||
2067 | /* | |
2068 | * Submit an IO to the hw | |
2069 | * | |
2070 | * This function is called by the block layer to issue an io | |
2071 | * to the device. Upon completion, the callback function will | |
2072 | * be called with the data parameter passed as the callback data. | |
2073 | * | |
2074 | * @dd Pointer to the driver data structure. | |
2075 | * @start First sector to read. | |
2076 | * @nsect Number of sectors to read. | |
2077 | * @nents Number of entries in scatter list for the read command. | |
2078 | * @tag The tag of this read command. | |
2079 | * @callback Pointer to the function that should be called | |
2080 | * when the read completes. | |
2081 | * @data Callback data passed to the callback function | |
2082 | * when the read completes. | |
2083 | * @barrier If non-zero, this command must be completed before | |
2084 | * issuing any other commands. | |
2085 | * @dir Direction (read or write) | |
2086 | * | |
2087 | * return value | |
2088 | * None | |
2089 | */ | |
6316668f JA |
2090 | static void mtip_hw_submit_io(struct driver_data *dd, sector_t start, |
2091 | int nsect, int nents, int tag, void *callback, | |
2092 | void *data, int barrier, int dir) | |
88523a61 SB |
2093 | { |
2094 | struct host_to_dev_fis *fis; | |
2095 | struct mtip_port *port = dd->port; | |
2096 | struct mtip_cmd *command = &port->commands[tag]; | |
2097 | ||
2098 | /* Map the scatter list for DMA access */ | |
2099 | if (dir == READ) | |
2100 | nents = dma_map_sg(&dd->pdev->dev, command->sg, | |
2101 | nents, DMA_FROM_DEVICE); | |
2102 | else | |
2103 | nents = dma_map_sg(&dd->pdev->dev, command->sg, | |
2104 | nents, DMA_TO_DEVICE); | |
2105 | ||
2106 | command->scatter_ents = nents; | |
2107 | ||
2108 | /* | |
2109 | * The number of retries for this command before it is | |
2110 | * reported as a failure to the upper layers. | |
2111 | */ | |
2112 | command->retries = MTIP_MAX_RETRIES; | |
2113 | ||
2114 | /* Fill out fis */ | |
2115 | fis = command->command; | |
2116 | fis->type = 0x27; | |
2117 | fis->opts = 1 << 7; | |
2118 | fis->command = | |
2119 | (dir == READ ? ATA_CMD_FPDMA_READ : ATA_CMD_FPDMA_WRITE); | |
2120 | *((unsigned int *) &fis->lba_low) = (start & 0xffffff); | |
2121 | *((unsigned int *) &fis->lba_low_ex) = ((start >> 24) & 0xffffff); | |
2122 | fis->device = 1 << 6; | |
2123 | if (barrier) | |
2124 | fis->device |= FUA_BIT; | |
2125 | fis->features = nsect & 0xff; | |
2126 | fis->features_ex = (nsect >> 8) & 0xff; | |
2127 | fis->sect_count = ((tag << 3) | (tag >> 5)); | |
2128 | fis->sect_cnt_ex = 0; | |
2129 | fis->control = 0; | |
2130 | fis->res2 = 0; | |
2131 | fis->res3 = 0; | |
2132 | fill_command_sg(dd, command, nents); | |
2133 | ||
2134 | /* Populate the command header */ | |
2135 | command->command_header->opts = cpu_to_le32( | |
2136 | (nents << 16) | 5 | AHCI_CMD_PREFETCH); | |
2137 | command->command_header->byte_count = 0; | |
2138 | ||
2139 | /* | |
2140 | * Set the completion function and data for the command | |
2141 | * within this layer. | |
2142 | */ | |
2143 | command->comp_data = dd; | |
2144 | command->comp_func = mtip_async_complete; | |
2145 | command->direction = (dir == READ ? DMA_FROM_DEVICE : DMA_TO_DEVICE); | |
2146 | ||
2147 | /* | |
2148 | * Set the completion function and data for the command passed | |
2149 | * from the upper layer. | |
2150 | */ | |
2151 | command->async_data = data; | |
2152 | command->async_callback = callback; | |
2153 | ||
2154 | /* | |
2155 | * Lock used to prevent this command from being issued | |
2156 | * if an internal command is in progress. | |
2157 | */ | |
2158 | down_read(&port->dd->internal_sem); | |
2159 | ||
2160 | /* Issue the command to the hardware */ | |
2161 | mtip_issue_ncq_command(port, tag); | |
2162 | ||
2163 | /* Set the command's timeout value.*/ | |
2164 | port->commands[tag].comp_time = jiffies + msecs_to_jiffies( | |
2165 | MTIP_NCQ_COMMAND_TIMEOUT_MS); | |
2166 | ||
2167 | up_read(&port->dd->internal_sem); | |
2168 | } | |
2169 | ||
2170 | /* | |
2171 | * Release a command slot. | |
2172 | * | |
2173 | * @dd Pointer to the driver data structure. | |
2174 | * @tag Slot tag | |
2175 | * | |
2176 | * return value | |
2177 | * None | |
2178 | */ | |
6316668f | 2179 | static void mtip_hw_release_scatterlist(struct driver_data *dd, int tag) |
88523a61 SB |
2180 | { |
2181 | release_slot(dd->port, tag); | |
2182 | } | |
2183 | ||
2184 | /* | |
2185 | * Obtain a command slot and return its associated scatter list. | |
2186 | * | |
2187 | * @dd Pointer to the driver data structure. | |
2188 | * @tag Pointer to an int that will receive the allocated command | |
2189 | * slot tag. | |
2190 | * | |
2191 | * return value | |
2192 | * Pointer to the scatter list for the allocated command slot | |
2193 | * or NULL if no command slots are available. | |
2194 | */ | |
6316668f JA |
2195 | static struct scatterlist *mtip_hw_get_scatterlist(struct driver_data *dd, |
2196 | int *tag) | |
88523a61 SB |
2197 | { |
2198 | /* | |
2199 | * It is possible that, even with this semaphore, a thread | |
2200 | * may think that no command slots are available. Therefore, we | |
2201 | * need to make an attempt to get_slot(). | |
2202 | */ | |
2203 | down(&dd->port->cmd_slot); | |
2204 | *tag = get_slot(dd->port); | |
2205 | ||
2206 | if (unlikely(*tag < 0)) | |
2207 | return NULL; | |
2208 | ||
2209 | return dd->port->commands[*tag].sg; | |
2210 | } | |
2211 | ||
2212 | /* | |
2213 | * Sysfs register/status dump. | |
2214 | * | |
2215 | * @dev Pointer to the device structure, passed by the kernrel. | |
2216 | * @attr Pointer to the device_attribute structure passed by the kernel. | |
2217 | * @buf Pointer to the char buffer that will receive the stats info. | |
2218 | * | |
2219 | * return value | |
2220 | * The size, in bytes, of the data copied into buf. | |
2221 | */ | |
2222 | static ssize_t hw_show_registers(struct device *dev, | |
2223 | struct device_attribute *attr, | |
2224 | char *buf) | |
2225 | { | |
2226 | u32 group_allocated; | |
2227 | struct driver_data *dd = dev_to_disk(dev)->private_data; | |
2228 | int size = 0; | |
2229 | int n; | |
2230 | ||
2231 | size += sprintf(&buf[size], "%s:\ns_active:\n", __func__); | |
2232 | ||
2233 | for (n = 0; n < dd->slot_groups; n++) | |
2234 | size += sprintf(&buf[size], "0x%08x\n", | |
2235 | readl(dd->port->s_active[n])); | |
2236 | ||
2237 | size += sprintf(&buf[size], "Command Issue:\n"); | |
2238 | ||
2239 | for (n = 0; n < dd->slot_groups; n++) | |
2240 | size += sprintf(&buf[size], "0x%08x\n", | |
2241 | readl(dd->port->cmd_issue[n])); | |
2242 | ||
2243 | size += sprintf(&buf[size], "Allocated:\n"); | |
2244 | ||
2245 | for (n = 0; n < dd->slot_groups; n++) { | |
2246 | if (sizeof(long) > sizeof(u32)) | |
2247 | group_allocated = | |
2248 | dd->port->allocated[n/2] >> (32*(n&1)); | |
2249 | else | |
2250 | group_allocated = dd->port->allocated[n]; | |
2251 | size += sprintf(&buf[size], "0x%08x\n", | |
2252 | group_allocated); | |
2253 | } | |
2254 | ||
2255 | size += sprintf(&buf[size], "completed:\n"); | |
2256 | ||
2257 | for (n = 0; n < dd->slot_groups; n++) | |
2258 | size += sprintf(&buf[size], "0x%08x\n", | |
2259 | readl(dd->port->completed[n])); | |
2260 | ||
2261 | size += sprintf(&buf[size], "PORT_IRQ_STAT 0x%08x\n", | |
2262 | readl(dd->port->mmio + PORT_IRQ_STAT)); | |
2263 | size += sprintf(&buf[size], "HOST_IRQ_STAT 0x%08x\n", | |
2264 | readl(dd->mmio + HOST_IRQ_STAT)); | |
2265 | ||
2266 | return size; | |
2267 | } | |
2268 | static DEVICE_ATTR(registers, S_IRUGO, hw_show_registers, NULL); | |
2269 | ||
2270 | /* | |
2271 | * Create the sysfs related attributes. | |
2272 | * | |
2273 | * @dd Pointer to the driver data structure. | |
2274 | * @kobj Pointer to the kobj for the block device. | |
2275 | * | |
2276 | * return value | |
2277 | * 0 Operation completed successfully. | |
2278 | * -EINVAL Invalid parameter. | |
2279 | */ | |
6316668f | 2280 | static int mtip_hw_sysfs_init(struct driver_data *dd, struct kobject *kobj) |
88523a61 SB |
2281 | { |
2282 | if (!kobj || !dd) | |
2283 | return -EINVAL; | |
2284 | ||
2285 | if (sysfs_create_file(kobj, &dev_attr_registers.attr)) | |
2286 | dev_warn(&dd->pdev->dev, | |
2287 | "Error creating registers sysfs entry\n"); | |
2288 | return 0; | |
2289 | } | |
2290 | ||
2291 | /* | |
2292 | * Remove the sysfs related attributes. | |
2293 | * | |
2294 | * @dd Pointer to the driver data structure. | |
2295 | * @kobj Pointer to the kobj for the block device. | |
2296 | * | |
2297 | * return value | |
2298 | * 0 Operation completed successfully. | |
2299 | * -EINVAL Invalid parameter. | |
2300 | */ | |
6316668f | 2301 | static int mtip_hw_sysfs_exit(struct driver_data *dd, struct kobject *kobj) |
88523a61 SB |
2302 | { |
2303 | if (!kobj || !dd) | |
2304 | return -EINVAL; | |
2305 | ||
2306 | sysfs_remove_file(kobj, &dev_attr_registers.attr); | |
2307 | ||
2308 | return 0; | |
2309 | } | |
2310 | ||
2311 | /* | |
2312 | * Perform any init/resume time hardware setup | |
2313 | * | |
2314 | * @dd Pointer to the driver data structure. | |
2315 | * | |
2316 | * return value | |
2317 | * None | |
2318 | */ | |
2319 | static inline void hba_setup(struct driver_data *dd) | |
2320 | { | |
2321 | u32 hwdata; | |
2322 | hwdata = readl(dd->mmio + HOST_HSORG); | |
2323 | ||
2324 | /* interrupt bug workaround: use only 1 IS bit.*/ | |
2325 | writel(hwdata | | |
2326 | HSORG_DISABLE_SLOTGRP_INTR | | |
2327 | HSORG_DISABLE_SLOTGRP_PXIS, | |
2328 | dd->mmio + HOST_HSORG); | |
2329 | } | |
2330 | ||
2331 | /* | |
2332 | * Detect the details of the product, and store anything needed | |
2333 | * into the driver data structure. This includes product type and | |
2334 | * version and number of slot groups. | |
2335 | * | |
2336 | * @dd Pointer to the driver data structure. | |
2337 | * | |
2338 | * return value | |
2339 | * None | |
2340 | */ | |
2341 | static void mtip_detect_product(struct driver_data *dd) | |
2342 | { | |
2343 | u32 hwdata; | |
2344 | unsigned int rev, slotgroups; | |
2345 | ||
2346 | /* | |
2347 | * HBA base + 0xFC [15:0] - vendor-specific hardware interface | |
2348 | * info register: | |
2349 | * [15:8] hardware/software interface rev# | |
2350 | * [ 3] asic-style interface | |
2351 | * [ 2:0] number of slot groups, minus 1 (only valid for asic-style). | |
2352 | */ | |
2353 | hwdata = readl(dd->mmio + HOST_HSORG); | |
2354 | ||
2355 | dd->product_type = MTIP_PRODUCT_UNKNOWN; | |
2356 | dd->slot_groups = 1; | |
2357 | ||
2358 | if (hwdata & 0x8) { | |
2359 | dd->product_type = MTIP_PRODUCT_ASICFPGA; | |
2360 | rev = (hwdata & HSORG_HWREV) >> 8; | |
2361 | slotgroups = (hwdata & HSORG_SLOTGROUPS) + 1; | |
2362 | dev_info(&dd->pdev->dev, | |
2363 | "ASIC-FPGA design, HS rev 0x%x, " | |
2364 | "%i slot groups [%i slots]\n", | |
2365 | rev, | |
2366 | slotgroups, | |
2367 | slotgroups * 32); | |
2368 | ||
2369 | if (slotgroups > MTIP_MAX_SLOT_GROUPS) { | |
2370 | dev_warn(&dd->pdev->dev, | |
2371 | "Warning: driver only supports " | |
2372 | "%i slot groups.\n", MTIP_MAX_SLOT_GROUPS); | |
2373 | slotgroups = MTIP_MAX_SLOT_GROUPS; | |
2374 | } | |
2375 | dd->slot_groups = slotgroups; | |
2376 | return; | |
2377 | } | |
2378 | ||
2379 | dev_warn(&dd->pdev->dev, "Unrecognized product id\n"); | |
2380 | } | |
2381 | ||
2382 | /* | |
2383 | * Blocking wait for FTL rebuild to complete | |
2384 | * | |
2385 | * @dd Pointer to the DRIVER_DATA structure. | |
2386 | * | |
2387 | * return value | |
2388 | * 0 FTL rebuild completed successfully | |
2389 | * -EFAULT FTL rebuild error/timeout/interruption | |
2390 | */ | |
2391 | static int mtip_ftl_rebuild_poll(struct driver_data *dd) | |
2392 | { | |
2393 | unsigned long timeout, cnt = 0, start; | |
2394 | ||
2395 | dev_warn(&dd->pdev->dev, | |
2396 | "FTL rebuild in progress. Polling for completion.\n"); | |
2397 | ||
2398 | start = jiffies; | |
2399 | dd->ftlrebuildflag = 1; | |
2400 | timeout = jiffies + msecs_to_jiffies(MTIP_FTL_REBUILD_TIMEOUT_MS); | |
2401 | ||
2402 | do { | |
2403 | #ifdef CONFIG_HOTPLUG | |
2404 | if (mtip_check_surprise_removal(dd->pdev)) | |
2405 | return -EFAULT; | |
2406 | #endif | |
2407 | if (mtip_get_identify(dd->port, NULL) < 0) | |
2408 | return -EFAULT; | |
2409 | ||
2410 | if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == | |
2411 | MTIP_FTL_REBUILD_MAGIC) { | |
2412 | ssleep(1); | |
2413 | /* Print message every 3 minutes */ | |
2414 | if (cnt++ >= 180) { | |
2415 | dev_warn(&dd->pdev->dev, | |
2416 | "FTL rebuild in progress (%d secs).\n", | |
2417 | jiffies_to_msecs(jiffies - start) / 1000); | |
2418 | cnt = 0; | |
2419 | } | |
2420 | } else { | |
2421 | dev_warn(&dd->pdev->dev, | |
2422 | "FTL rebuild complete (%d secs).\n", | |
2423 | jiffies_to_msecs(jiffies - start) / 1000); | |
2424 | dd->ftlrebuildflag = 0; | |
2425 | break; | |
2426 | } | |
2427 | ssleep(10); | |
2428 | } while (time_before(jiffies, timeout)); | |
2429 | ||
2430 | /* Check for timeout */ | |
2431 | if (dd->ftlrebuildflag) { | |
2432 | dev_err(&dd->pdev->dev, | |
2433 | "Timed out waiting for FTL rebuild to complete (%d secs).\n", | |
2434 | jiffies_to_msecs(jiffies - start) / 1000); | |
2435 | return -EFAULT; | |
2436 | } | |
2437 | ||
2438 | return 0; | |
2439 | } | |
2440 | ||
2441 | /* | |
2442 | * Called once for each card. | |
2443 | * | |
2444 | * @dd Pointer to the driver data structure. | |
2445 | * | |
2446 | * return value | |
2447 | * 0 on success, else an error code. | |
2448 | */ | |
6316668f | 2449 | static int mtip_hw_init(struct driver_data *dd) |
88523a61 SB |
2450 | { |
2451 | int i; | |
2452 | int rv; | |
2453 | unsigned int num_command_slots; | |
2454 | ||
2455 | dd->mmio = pcim_iomap_table(dd->pdev)[MTIP_ABAR]; | |
2456 | ||
2457 | mtip_detect_product(dd); | |
2458 | if (dd->product_type == MTIP_PRODUCT_UNKNOWN) { | |
2459 | rv = -EIO; | |
2460 | goto out1; | |
2461 | } | |
2462 | num_command_slots = dd->slot_groups * 32; | |
2463 | ||
2464 | hba_setup(dd); | |
2465 | ||
2466 | /* | |
2467 | * Initialize the internal semaphore | |
2468 | * Use a rw semaphore to enable prioritization of | |
2469 | * mgmnt ioctl traffic during heavy IO load | |
2470 | */ | |
2471 | init_rwsem(&dd->internal_sem); | |
2472 | ||
2473 | tasklet_init(&dd->tasklet, mtip_tasklet, (unsigned long)dd); | |
2474 | ||
2475 | dd->port = kzalloc(sizeof(struct mtip_port), GFP_KERNEL); | |
2476 | if (!dd->port) { | |
2477 | dev_err(&dd->pdev->dev, | |
2478 | "Memory allocation: port structure\n"); | |
2479 | return -ENOMEM; | |
2480 | } | |
2481 | ||
2482 | /* Counting semaphore to track command slot usage */ | |
2483 | sema_init(&dd->port->cmd_slot, num_command_slots - 1); | |
2484 | ||
2485 | /* Spinlock to prevent concurrent issue */ | |
2486 | spin_lock_init(&dd->port->cmd_issue_lock); | |
2487 | ||
2488 | /* Set the port mmio base address. */ | |
2489 | dd->port->mmio = dd->mmio + PORT_OFFSET; | |
2490 | dd->port->dd = dd; | |
2491 | ||
2492 | /* Allocate memory for the command list. */ | |
2493 | dd->port->command_list = | |
2494 | dmam_alloc_coherent(&dd->pdev->dev, | |
2495 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 2), | |
2496 | &dd->port->command_list_dma, | |
2497 | GFP_KERNEL); | |
2498 | if (!dd->port->command_list) { | |
2499 | dev_err(&dd->pdev->dev, | |
2500 | "Memory allocation: command list\n"); | |
2501 | rv = -ENOMEM; | |
2502 | goto out1; | |
2503 | } | |
2504 | ||
2505 | /* Clear the memory we have allocated. */ | |
2506 | memset(dd->port->command_list, | |
2507 | 0, | |
2508 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 2)); | |
2509 | ||
2510 | /* Setup the addresse of the RX FIS. */ | |
2511 | dd->port->rxfis = dd->port->command_list + HW_CMD_SLOT_SZ; | |
2512 | dd->port->rxfis_dma = dd->port->command_list_dma + HW_CMD_SLOT_SZ; | |
2513 | ||
2514 | /* Setup the address of the command tables. */ | |
2515 | dd->port->command_table = dd->port->rxfis + AHCI_RX_FIS_SZ; | |
2516 | dd->port->command_tbl_dma = dd->port->rxfis_dma + AHCI_RX_FIS_SZ; | |
2517 | ||
2518 | /* Setup the address of the identify data. */ | |
2519 | dd->port->identify = dd->port->command_table + | |
2520 | HW_CMD_TBL_AR_SZ; | |
2521 | dd->port->identify_dma = dd->port->command_tbl_dma + | |
2522 | HW_CMD_TBL_AR_SZ; | |
2523 | ||
2524 | /* Setup the address of the sector buffer. */ | |
2525 | dd->port->sector_buffer = (void *) dd->port->identify + ATA_SECT_SIZE; | |
2526 | dd->port->sector_buffer_dma = dd->port->identify_dma + ATA_SECT_SIZE; | |
2527 | ||
2528 | /* Point the command headers at the command tables. */ | |
2529 | for (i = 0; i < num_command_slots; i++) { | |
2530 | dd->port->commands[i].command_header = | |
2531 | dd->port->command_list + | |
2532 | (sizeof(struct mtip_cmd_hdr) * i); | |
2533 | dd->port->commands[i].command_header_dma = | |
2534 | dd->port->command_list_dma + | |
2535 | (sizeof(struct mtip_cmd_hdr) * i); | |
2536 | ||
2537 | dd->port->commands[i].command = | |
2538 | dd->port->command_table + (HW_CMD_TBL_SZ * i); | |
2539 | dd->port->commands[i].command_dma = | |
2540 | dd->port->command_tbl_dma + (HW_CMD_TBL_SZ * i); | |
2541 | ||
2542 | if (readl(dd->mmio + HOST_CAP) & HOST_CAP_64) | |
2543 | dd->port->commands[i].command_header->ctbau = | |
2544 | cpu_to_le32( | |
2545 | (dd->port->commands[i].command_dma >> 16) >> 16); | |
2546 | dd->port->commands[i].command_header->ctba = cpu_to_le32( | |
2547 | dd->port->commands[i].command_dma & 0xffffffff); | |
2548 | ||
2549 | /* | |
2550 | * If this is not done, a bug is reported by the stock | |
2551 | * FC11 i386. Due to the fact that it has lots of kernel | |
2552 | * debugging enabled. | |
2553 | */ | |
2554 | sg_init_table(dd->port->commands[i].sg, MTIP_MAX_SG); | |
2555 | ||
2556 | /* Mark all commands as currently inactive.*/ | |
2557 | atomic_set(&dd->port->commands[i].active, 0); | |
2558 | } | |
2559 | ||
2560 | /* Setup the pointers to the extended s_active and CI registers. */ | |
2561 | for (i = 0; i < dd->slot_groups; i++) { | |
2562 | dd->port->s_active[i] = | |
2563 | dd->port->mmio + i*0x80 + PORT_SCR_ACT; | |
2564 | dd->port->cmd_issue[i] = | |
2565 | dd->port->mmio + i*0x80 + PORT_COMMAND_ISSUE; | |
2566 | dd->port->completed[i] = | |
2567 | dd->port->mmio + i*0x80 + PORT_SDBV; | |
2568 | } | |
2569 | ||
2570 | /* Reset the HBA. */ | |
2571 | if (mtip_hba_reset(dd) < 0) { | |
2572 | dev_err(&dd->pdev->dev, | |
2573 | "Card did not reset within timeout\n"); | |
2574 | rv = -EIO; | |
2575 | goto out2; | |
2576 | } | |
2577 | ||
2578 | mtip_init_port(dd->port); | |
2579 | mtip_start_port(dd->port); | |
2580 | ||
2581 | /* Setup the ISR and enable interrupts. */ | |
2582 | rv = devm_request_irq(&dd->pdev->dev, | |
2583 | dd->pdev->irq, | |
2584 | mtip_irq_handler, | |
2585 | IRQF_SHARED, | |
2586 | dev_driver_string(&dd->pdev->dev), | |
2587 | dd); | |
2588 | ||
2589 | if (rv) { | |
2590 | dev_err(&dd->pdev->dev, | |
2591 | "Unable to allocate IRQ %d\n", dd->pdev->irq); | |
2592 | goto out2; | |
2593 | } | |
2594 | ||
2595 | /* Enable interrupts on the HBA. */ | |
2596 | writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, | |
2597 | dd->mmio + HOST_CTL); | |
2598 | ||
2599 | init_timer(&dd->port->cmd_timer); | |
2600 | dd->port->cmd_timer.data = (unsigned long int) dd->port; | |
2601 | dd->port->cmd_timer.function = mtip_timeout_function; | |
2602 | mod_timer(&dd->port->cmd_timer, | |
2603 | jiffies + msecs_to_jiffies(MTIP_TIMEOUT_CHECK_PERIOD)); | |
2604 | ||
2605 | if (mtip_get_identify(dd->port, NULL) < 0) { | |
2606 | rv = -EFAULT; | |
2607 | goto out3; | |
2608 | } | |
2609 | mtip_dump_identify(dd->port); | |
2610 | ||
2611 | if (*(dd->port->identify + MTIP_FTL_REBUILD_OFFSET) == | |
2612 | MTIP_FTL_REBUILD_MAGIC) { | |
2613 | return mtip_ftl_rebuild_poll(dd); | |
2614 | } | |
2615 | return rv; | |
2616 | ||
2617 | out3: | |
2618 | del_timer_sync(&dd->port->cmd_timer); | |
2619 | ||
2620 | /* Disable interrupts on the HBA. */ | |
2621 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, | |
2622 | dd->mmio + HOST_CTL); | |
2623 | ||
2624 | /*Release the IRQ. */ | |
2625 | devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd); | |
2626 | ||
2627 | out2: | |
2628 | mtip_deinit_port(dd->port); | |
2629 | ||
2630 | /* Free the command/command header memory. */ | |
2631 | dmam_free_coherent(&dd->pdev->dev, | |
2632 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 2), | |
2633 | dd->port->command_list, | |
2634 | dd->port->command_list_dma); | |
2635 | out1: | |
2636 | /* Free the memory allocated for the for structure. */ | |
2637 | kfree(dd->port); | |
2638 | ||
2639 | return rv; | |
2640 | } | |
2641 | ||
2642 | /* | |
2643 | * Called to deinitialize an interface. | |
2644 | * | |
2645 | * @dd Pointer to the driver data structure. | |
2646 | * | |
2647 | * return value | |
2648 | * 0 | |
2649 | */ | |
6316668f | 2650 | static int mtip_hw_exit(struct driver_data *dd) |
88523a61 SB |
2651 | { |
2652 | /* | |
2653 | * Send standby immediate (E0h) to the drive so that it | |
2654 | * saves its state. | |
2655 | */ | |
2656 | if (atomic_read(&dd->drv_cleanup_done) != true) { | |
2657 | ||
2658 | mtip_standby_immediate(dd->port); | |
2659 | ||
2660 | /* de-initialize the port. */ | |
2661 | mtip_deinit_port(dd->port); | |
2662 | ||
2663 | /* Disable interrupts on the HBA. */ | |
2664 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, | |
2665 | dd->mmio + HOST_CTL); | |
2666 | } | |
2667 | ||
2668 | del_timer_sync(&dd->port->cmd_timer); | |
2669 | ||
2670 | /* Stop the bottom half tasklet. */ | |
2671 | tasklet_kill(&dd->tasklet); | |
2672 | ||
2673 | /* Release the IRQ. */ | |
2674 | devm_free_irq(&dd->pdev->dev, dd->pdev->irq, dd); | |
2675 | ||
2676 | /* Free the command/command header memory. */ | |
2677 | dmam_free_coherent(&dd->pdev->dev, | |
2678 | HW_PORT_PRIV_DMA_SZ + (ATA_SECT_SIZE * 2), | |
2679 | dd->port->command_list, | |
2680 | dd->port->command_list_dma); | |
2681 | /* Free the memory allocated for the for structure. */ | |
2682 | kfree(dd->port); | |
2683 | ||
2684 | return 0; | |
2685 | } | |
2686 | ||
2687 | /* | |
2688 | * Issue a Standby Immediate command to the device. | |
2689 | * | |
2690 | * This function is called by the Block Layer just before the | |
2691 | * system powers off during a shutdown. | |
2692 | * | |
2693 | * @dd Pointer to the driver data structure. | |
2694 | * | |
2695 | * return value | |
2696 | * 0 | |
2697 | */ | |
6316668f | 2698 | static int mtip_hw_shutdown(struct driver_data *dd) |
88523a61 SB |
2699 | { |
2700 | /* | |
2701 | * Send standby immediate (E0h) to the drive so that it | |
2702 | * saves its state. | |
2703 | */ | |
2704 | mtip_standby_immediate(dd->port); | |
2705 | ||
2706 | return 0; | |
2707 | } | |
2708 | ||
2709 | /* | |
2710 | * Suspend function | |
2711 | * | |
2712 | * This function is called by the Block Layer just before the | |
2713 | * system hibernates. | |
2714 | * | |
2715 | * @dd Pointer to the driver data structure. | |
2716 | * | |
2717 | * return value | |
2718 | * 0 Suspend was successful | |
2719 | * -EFAULT Suspend was not successful | |
2720 | */ | |
6316668f | 2721 | static int mtip_hw_suspend(struct driver_data *dd) |
88523a61 SB |
2722 | { |
2723 | /* | |
2724 | * Send standby immediate (E0h) to the drive | |
2725 | * so that it saves its state. | |
2726 | */ | |
2727 | if (mtip_standby_immediate(dd->port) != 0) { | |
2728 | dev_err(&dd->pdev->dev, | |
2729 | "Failed standby-immediate command\n"); | |
2730 | return -EFAULT; | |
2731 | } | |
2732 | ||
2733 | /* Disable interrupts on the HBA.*/ | |
2734 | writel(readl(dd->mmio + HOST_CTL) & ~HOST_IRQ_EN, | |
2735 | dd->mmio + HOST_CTL); | |
2736 | mtip_deinit_port(dd->port); | |
2737 | ||
2738 | return 0; | |
2739 | } | |
2740 | ||
2741 | /* | |
2742 | * Resume function | |
2743 | * | |
2744 | * This function is called by the Block Layer as the | |
2745 | * system resumes. | |
2746 | * | |
2747 | * @dd Pointer to the driver data structure. | |
2748 | * | |
2749 | * return value | |
2750 | * 0 Resume was successful | |
2751 | * -EFAULT Resume was not successful | |
2752 | */ | |
6316668f | 2753 | static int mtip_hw_resume(struct driver_data *dd) |
88523a61 SB |
2754 | { |
2755 | /* Perform any needed hardware setup steps */ | |
2756 | hba_setup(dd); | |
2757 | ||
2758 | /* Reset the HBA */ | |
2759 | if (mtip_hba_reset(dd) != 0) { | |
2760 | dev_err(&dd->pdev->dev, | |
2761 | "Unable to reset the HBA\n"); | |
2762 | return -EFAULT; | |
2763 | } | |
2764 | ||
2765 | /* | |
2766 | * Enable the port, DMA engine, and FIS reception specific | |
2767 | * h/w in controller. | |
2768 | */ | |
2769 | mtip_init_port(dd->port); | |
2770 | mtip_start_port(dd->port); | |
2771 | ||
2772 | /* Enable interrupts on the HBA.*/ | |
2773 | writel(readl(dd->mmio + HOST_CTL) | HOST_IRQ_EN, | |
2774 | dd->mmio + HOST_CTL); | |
2775 | ||
2776 | return 0; | |
2777 | } | |
2778 | ||
88523a61 SB |
2779 | /* |
2780 | * Helper function for reusing disk name | |
2781 | * upon hot insertion. | |
2782 | */ | |
2783 | static int rssd_disk_name_format(char *prefix, | |
2784 | int index, | |
2785 | char *buf, | |
2786 | int buflen) | |
2787 | { | |
2788 | const int base = 'z' - 'a' + 1; | |
2789 | char *begin = buf + strlen(prefix); | |
2790 | char *end = buf + buflen; | |
2791 | char *p; | |
2792 | int unit; | |
2793 | ||
2794 | p = end - 1; | |
2795 | *p = '\0'; | |
2796 | unit = base; | |
2797 | do { | |
2798 | if (p == begin) | |
2799 | return -EINVAL; | |
2800 | *--p = 'a' + (index % unit); | |
2801 | index = (index / unit) - 1; | |
2802 | } while (index >= 0); | |
2803 | ||
2804 | memmove(begin, p, end - p); | |
2805 | memcpy(buf, prefix, strlen(prefix)); | |
2806 | ||
2807 | return 0; | |
2808 | } | |
2809 | ||
2810 | /* | |
2811 | * Block layer IOCTL handler. | |
2812 | * | |
2813 | * @dev Pointer to the block_device structure. | |
2814 | * @mode ignored | |
2815 | * @cmd IOCTL command passed from the user application. | |
2816 | * @arg Argument passed from the user application. | |
2817 | * | |
2818 | * return value | |
2819 | * 0 IOCTL completed successfully. | |
2820 | * -ENOTTY IOCTL not supported or invalid driver data | |
2821 | * structure pointer. | |
2822 | */ | |
2823 | static int mtip_block_ioctl(struct block_device *dev, | |
2824 | fmode_t mode, | |
2825 | unsigned cmd, | |
2826 | unsigned long arg) | |
2827 | { | |
2828 | struct driver_data *dd = dev->bd_disk->private_data; | |
2829 | ||
2830 | if (!capable(CAP_SYS_ADMIN)) | |
2831 | return -EACCES; | |
2832 | ||
2833 | if (!dd) | |
2834 | return -ENOTTY; | |
2835 | ||
2836 | switch (cmd) { | |
2837 | case BLKFLSBUF: | |
2838 | return 0; | |
2839 | default: | |
ef0f1587 | 2840 | return mtip_hw_ioctl(dd, cmd, arg); |
88523a61 SB |
2841 | } |
2842 | } | |
2843 | ||
16d02c04 | 2844 | #ifdef CONFIG_COMPAT |
88523a61 SB |
2845 | /* |
2846 | * Block layer compat IOCTL handler. | |
2847 | * | |
2848 | * @dev Pointer to the block_device structure. | |
2849 | * @mode ignored | |
2850 | * @cmd IOCTL command passed from the user application. | |
2851 | * @arg Argument passed from the user application. | |
2852 | * | |
2853 | * return value | |
2854 | * 0 IOCTL completed successfully. | |
2855 | * -ENOTTY IOCTL not supported or invalid driver data | |
2856 | * structure pointer. | |
2857 | */ | |
2858 | static int mtip_block_compat_ioctl(struct block_device *dev, | |
2859 | fmode_t mode, | |
2860 | unsigned cmd, | |
2861 | unsigned long arg) | |
2862 | { | |
2863 | struct driver_data *dd = dev->bd_disk->private_data; | |
2864 | ||
2865 | if (!capable(CAP_SYS_ADMIN)) | |
2866 | return -EACCES; | |
2867 | ||
2868 | if (!dd) | |
2869 | return -ENOTTY; | |
2870 | ||
2871 | switch (cmd) { | |
2872 | case BLKFLSBUF: | |
2873 | return 0; | |
ef0f1587 JA |
2874 | case HDIO_DRIVE_TASKFILE: { |
2875 | struct mtip_compat_ide_task_request_s *compat_req_task; | |
2876 | ide_task_request_t req_task; | |
2877 | int compat_tasksize, outtotal, ret; | |
2878 | ||
2879 | compat_tasksize = sizeof(struct mtip_compat_ide_task_request_s); | |
2880 | ||
2881 | compat_req_task = | |
2882 | (struct mtip_compat_ide_task_request_s __user *) arg; | |
2883 | ||
2884 | if (copy_from_user(&req_task, (void __user *) arg, | |
2885 | compat_tasksize - (2 * sizeof(compat_long_t)))) | |
2886 | return -EFAULT; | |
2887 | ||
2888 | if (get_user(req_task.out_size, &compat_req_task->out_size)) | |
2889 | return -EFAULT; | |
2890 | ||
2891 | if (get_user(req_task.in_size, &compat_req_task->in_size)) | |
2892 | return -EFAULT; | |
2893 | ||
2894 | outtotal = sizeof(struct mtip_compat_ide_task_request_s); | |
2895 | ||
2896 | ret = exec_drive_taskfile(dd, (void __user *) arg, | |
2897 | &req_task, outtotal); | |
2898 | ||
2899 | if (copy_to_user((void __user *) arg, &req_task, | |
2900 | compat_tasksize - | |
2901 | (2 * sizeof(compat_long_t)))) | |
2902 | return -EFAULT; | |
2903 | ||
2904 | if (put_user(req_task.out_size, &compat_req_task->out_size)) | |
2905 | return -EFAULT; | |
2906 | ||
2907 | if (put_user(req_task.in_size, &compat_req_task->in_size)) | |
2908 | return -EFAULT; | |
2909 | ||
2910 | return ret; | |
2911 | } | |
88523a61 | 2912 | default: |
ef0f1587 | 2913 | return mtip_hw_ioctl(dd, cmd, arg); |
88523a61 SB |
2914 | } |
2915 | } | |
16d02c04 | 2916 | #endif |
88523a61 SB |
2917 | |
2918 | /* | |
2919 | * Obtain the geometry of the device. | |
2920 | * | |
2921 | * You may think that this function is obsolete, but some applications, | |
2922 | * fdisk for example still used CHS values. This function describes the | |
2923 | * device as having 224 heads and 56 sectors per cylinder. These values are | |
2924 | * chosen so that each cylinder is aligned on a 4KB boundary. Since a | |
2925 | * partition is described in terms of a start and end cylinder this means | |
2926 | * that each partition is also 4KB aligned. Non-aligned partitions adversely | |
2927 | * affects performance. | |
2928 | * | |
2929 | * @dev Pointer to the block_device strucutre. | |
2930 | * @geo Pointer to a hd_geometry structure. | |
2931 | * | |
2932 | * return value | |
2933 | * 0 Operation completed successfully. | |
2934 | * -ENOTTY An error occurred while reading the drive capacity. | |
2935 | */ | |
2936 | static int mtip_block_getgeo(struct block_device *dev, | |
2937 | struct hd_geometry *geo) | |
2938 | { | |
2939 | struct driver_data *dd = dev->bd_disk->private_data; | |
2940 | sector_t capacity; | |
2941 | ||
2942 | if (!dd) | |
2943 | return -ENOTTY; | |
2944 | ||
2945 | if (!(mtip_hw_get_capacity(dd, &capacity))) { | |
2946 | dev_warn(&dd->pdev->dev, | |
2947 | "Could not get drive capacity.\n"); | |
2948 | return -ENOTTY; | |
2949 | } | |
2950 | ||
2951 | geo->heads = 224; | |
2952 | geo->sectors = 56; | |
2953 | #if BITS_PER_LONG == 64 | |
2954 | geo->cylinders = capacity / (geo->heads * geo->sectors); | |
2955 | #else | |
2956 | do_div(capacity, (geo->heads * geo->sectors)); | |
2957 | geo->cylinders = capacity; | |
2958 | #endif | |
2959 | return 0; | |
2960 | } | |
2961 | ||
2962 | /* | |
2963 | * Block device operation function. | |
2964 | * | |
2965 | * This structure contains pointers to the functions required by the block | |
2966 | * layer. | |
2967 | */ | |
2968 | static const struct block_device_operations mtip_block_ops = { | |
2969 | .ioctl = mtip_block_ioctl, | |
16d02c04 | 2970 | #ifdef CONFIG_COMPAT |
88523a61 | 2971 | .compat_ioctl = mtip_block_compat_ioctl, |
16d02c04 | 2972 | #endif |
88523a61 SB |
2973 | .getgeo = mtip_block_getgeo, |
2974 | .owner = THIS_MODULE | |
2975 | }; | |
2976 | ||
2977 | /* | |
2978 | * Block layer make request function. | |
2979 | * | |
2980 | * This function is called by the kernel to process a BIO for | |
2981 | * the P320 device. | |
2982 | * | |
2983 | * @queue Pointer to the request queue. Unused other than to obtain | |
2984 | * the driver data structure. | |
2985 | * @bio Pointer to the BIO. | |
2986 | * | |
88523a61 | 2987 | */ |
a71f483d | 2988 | static void mtip_make_request(struct request_queue *queue, struct bio *bio) |
88523a61 SB |
2989 | { |
2990 | struct driver_data *dd = queue->queuedata; | |
2991 | struct scatterlist *sg; | |
2992 | struct bio_vec *bvec; | |
2993 | int nents = 0; | |
2994 | int tag = 0; | |
2995 | ||
2996 | if (unlikely(!bio_has_data(bio))) { | |
2997 | blk_queue_flush(queue, 0); | |
2998 | bio_endio(bio, 0); | |
a71f483d | 2999 | return; |
88523a61 SB |
3000 | } |
3001 | ||
3002 | if (unlikely(atomic_read(&dd->eh_active))) { | |
3003 | bio_endio(bio, -EBUSY); | |
a71f483d | 3004 | return; |
88523a61 SB |
3005 | } |
3006 | ||
3007 | sg = mtip_hw_get_scatterlist(dd, &tag); | |
3008 | if (likely(sg != NULL)) { | |
3009 | blk_queue_bounce(queue, &bio); | |
3010 | ||
3011 | if (unlikely((bio)->bi_vcnt > MTIP_MAX_SG)) { | |
3012 | dev_warn(&dd->pdev->dev, | |
3013 | "Maximum number of SGL entries exceeded"); | |
3014 | bio_io_error(bio); | |
3015 | mtip_hw_release_scatterlist(dd, tag); | |
a71f483d | 3016 | return; |
88523a61 SB |
3017 | } |
3018 | ||
3019 | /* Create the scatter list for this bio. */ | |
3020 | bio_for_each_segment(bvec, bio, nents) { | |
3021 | sg_set_page(&sg[nents], | |
3022 | bvec->bv_page, | |
3023 | bvec->bv_len, | |
3024 | bvec->bv_offset); | |
3025 | } | |
3026 | ||
3027 | /* Issue the read/write. */ | |
3028 | mtip_hw_submit_io(dd, | |
3029 | bio->bi_sector, | |
3030 | bio_sectors(bio), | |
3031 | nents, | |
3032 | tag, | |
3033 | bio_endio, | |
3034 | bio, | |
3035 | bio->bi_rw & REQ_FLUSH, | |
3036 | bio_data_dir(bio)); | |
a71f483d | 3037 | } else |
88523a61 | 3038 | bio_io_error(bio); |
88523a61 SB |
3039 | } |
3040 | ||
3041 | /* | |
3042 | * Block layer initialization function. | |
3043 | * | |
3044 | * This function is called once by the PCI layer for each P320 | |
3045 | * device that is connected to the system. | |
3046 | * | |
3047 | * @dd Pointer to the driver data structure. | |
3048 | * | |
3049 | * return value | |
3050 | * 0 on success else an error code. | |
3051 | */ | |
6316668f | 3052 | static int mtip_block_initialize(struct driver_data *dd) |
88523a61 SB |
3053 | { |
3054 | int rv = 0; | |
3055 | sector_t capacity; | |
3056 | unsigned int index = 0; | |
3057 | struct kobject *kobj; | |
3058 | ||
3059 | /* Initialize the protocol layer. */ | |
3060 | rv = mtip_hw_init(dd); | |
3061 | if (rv < 0) { | |
3062 | dev_err(&dd->pdev->dev, | |
3063 | "Protocol layer initialization failed\n"); | |
3064 | rv = -EINVAL; | |
3065 | goto protocol_init_error; | |
3066 | } | |
3067 | ||
3068 | /* Allocate the request queue. */ | |
3069 | dd->queue = blk_alloc_queue(GFP_KERNEL); | |
3070 | if (dd->queue == NULL) { | |
3071 | dev_err(&dd->pdev->dev, | |
3072 | "Unable to allocate request queue\n"); | |
3073 | rv = -ENOMEM; | |
3074 | goto block_queue_alloc_init_error; | |
3075 | } | |
3076 | ||
3077 | /* Attach our request function to the request queue. */ | |
3078 | blk_queue_make_request(dd->queue, mtip_make_request); | |
3079 | ||
3080 | /* Set device limits. */ | |
3081 | set_bit(QUEUE_FLAG_NONROT, &dd->queue->queue_flags); | |
3082 | blk_queue_max_segments(dd->queue, MTIP_MAX_SG); | |
3083 | blk_queue_physical_block_size(dd->queue, 4096); | |
3084 | blk_queue_io_min(dd->queue, 4096); | |
3085 | ||
3086 | dd->disk = alloc_disk(MTIP_MAX_MINORS); | |
3087 | if (dd->disk == NULL) { | |
3088 | dev_err(&dd->pdev->dev, | |
3089 | "Unable to allocate gendisk structure\n"); | |
3090 | rv = -EINVAL; | |
3091 | goto alloc_disk_error; | |
3092 | } | |
3093 | ||
3094 | /* Generate the disk name, implemented same as in sd.c */ | |
3095 | do { | |
3096 | if (!ida_pre_get(&rssd_index_ida, GFP_KERNEL)) | |
3097 | goto ida_get_error; | |
3098 | ||
3099 | spin_lock(&rssd_index_lock); | |
3100 | rv = ida_get_new(&rssd_index_ida, &index); | |
3101 | spin_unlock(&rssd_index_lock); | |
3102 | } while (rv == -EAGAIN); | |
3103 | ||
3104 | if (rv) | |
3105 | goto ida_get_error; | |
3106 | ||
3107 | rv = rssd_disk_name_format("rssd", | |
3108 | index, | |
3109 | dd->disk->disk_name, | |
3110 | DISK_NAME_LEN); | |
3111 | if (rv) | |
3112 | goto disk_index_error; | |
3113 | ||
3114 | dd->disk->driverfs_dev = &dd->pdev->dev; | |
3115 | dd->disk->major = dd->major; | |
3116 | dd->disk->first_minor = dd->instance * MTIP_MAX_MINORS; | |
3117 | dd->disk->fops = &mtip_block_ops; | |
3118 | dd->disk->queue = dd->queue; | |
3119 | dd->disk->private_data = dd; | |
3120 | dd->queue->queuedata = dd; | |
3121 | dd->index = index; | |
3122 | ||
3123 | /* Set the capacity of the device in 512 byte sectors. */ | |
3124 | if (!(mtip_hw_get_capacity(dd, &capacity))) { | |
3125 | dev_warn(&dd->pdev->dev, | |
3126 | "Could not read drive capacity\n"); | |
3127 | rv = -EIO; | |
3128 | goto read_capacity_error; | |
3129 | } | |
3130 | set_capacity(dd->disk, capacity); | |
3131 | ||
3132 | /* Enable the block device and add it to /dev */ | |
3133 | add_disk(dd->disk); | |
3134 | ||
3135 | /* | |
3136 | * Now that the disk is active, initialize any sysfs attributes | |
3137 | * managed by the protocol layer. | |
3138 | */ | |
3139 | kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); | |
3140 | if (kobj) { | |
3141 | mtip_hw_sysfs_init(dd, kobj); | |
3142 | kobject_put(kobj); | |
3143 | } | |
3144 | ||
3145 | return rv; | |
3146 | ||
3147 | read_capacity_error: | |
3148 | /* | |
3149 | * Delete our gendisk structure. This also removes the device | |
3150 | * from /dev | |
3151 | */ | |
3152 | del_gendisk(dd->disk); | |
3153 | ||
3154 | disk_index_error: | |
3155 | spin_lock(&rssd_index_lock); | |
3156 | ida_remove(&rssd_index_ida, index); | |
3157 | spin_unlock(&rssd_index_lock); | |
3158 | ||
3159 | ida_get_error: | |
3160 | put_disk(dd->disk); | |
3161 | ||
3162 | alloc_disk_error: | |
3163 | blk_cleanup_queue(dd->queue); | |
3164 | ||
3165 | block_queue_alloc_init_error: | |
3166 | /* De-initialize the protocol layer. */ | |
3167 | mtip_hw_exit(dd); | |
3168 | ||
3169 | protocol_init_error: | |
3170 | return rv; | |
3171 | } | |
3172 | ||
3173 | /* | |
3174 | * Block layer deinitialization function. | |
3175 | * | |
3176 | * Called by the PCI layer as each P320 device is removed. | |
3177 | * | |
3178 | * @dd Pointer to the driver data structure. | |
3179 | * | |
3180 | * return value | |
3181 | * 0 | |
3182 | */ | |
6316668f | 3183 | static int mtip_block_remove(struct driver_data *dd) |
88523a61 SB |
3184 | { |
3185 | struct kobject *kobj; | |
3186 | /* Clean up the sysfs attributes managed by the protocol layer. */ | |
3187 | kobj = kobject_get(&disk_to_dev(dd->disk)->kobj); | |
3188 | if (kobj) { | |
3189 | mtip_hw_sysfs_exit(dd, kobj); | |
3190 | kobject_put(kobj); | |
3191 | } | |
3192 | ||
3193 | /* | |
3194 | * Delete our gendisk structure. This also removes the device | |
3195 | * from /dev | |
3196 | */ | |
3197 | del_gendisk(dd->disk); | |
3198 | blk_cleanup_queue(dd->queue); | |
3199 | dd->disk = NULL; | |
3200 | dd->queue = NULL; | |
3201 | ||
3202 | /* De-initialize the protocol layer. */ | |
3203 | mtip_hw_exit(dd); | |
3204 | ||
3205 | return 0; | |
3206 | } | |
3207 | ||
3208 | /* | |
3209 | * Function called by the PCI layer when just before the | |
3210 | * machine shuts down. | |
3211 | * | |
3212 | * If a protocol layer shutdown function is present it will be called | |
3213 | * by this function. | |
3214 | * | |
3215 | * @dd Pointer to the driver data structure. | |
3216 | * | |
3217 | * return value | |
3218 | * 0 | |
3219 | */ | |
6316668f | 3220 | static int mtip_block_shutdown(struct driver_data *dd) |
88523a61 SB |
3221 | { |
3222 | dev_info(&dd->pdev->dev, | |
3223 | "Shutting down %s ...\n", dd->disk->disk_name); | |
3224 | ||
3225 | /* Delete our gendisk structure, and cleanup the blk queue. */ | |
3226 | del_gendisk(dd->disk); | |
3227 | blk_cleanup_queue(dd->queue); | |
3228 | dd->disk = NULL; | |
3229 | dd->queue = NULL; | |
3230 | ||
3231 | mtip_hw_shutdown(dd); | |
3232 | return 0; | |
3233 | } | |
3234 | ||
6316668f | 3235 | static int mtip_block_suspend(struct driver_data *dd) |
88523a61 SB |
3236 | { |
3237 | dev_info(&dd->pdev->dev, | |
3238 | "Suspending %s ...\n", dd->disk->disk_name); | |
3239 | mtip_hw_suspend(dd); | |
3240 | return 0; | |
3241 | } | |
3242 | ||
6316668f | 3243 | static int mtip_block_resume(struct driver_data *dd) |
88523a61 SB |
3244 | { |
3245 | dev_info(&dd->pdev->dev, "Resuming %s ...\n", | |
3246 | dd->disk->disk_name); | |
3247 | mtip_hw_resume(dd); | |
3248 | return 0; | |
3249 | } | |
3250 | ||
3251 | /* | |
3252 | * Called for each supported PCI device detected. | |
3253 | * | |
3254 | * This function allocates the private data structure, enables the | |
3255 | * PCI device and then calls the block layer initialization function. | |
3256 | * | |
3257 | * return value | |
3258 | * 0 on success else an error code. | |
3259 | */ | |
3260 | static int mtip_pci_probe(struct pci_dev *pdev, | |
3261 | const struct pci_device_id *ent) | |
3262 | { | |
3263 | int rv = 0; | |
3264 | struct driver_data *dd = NULL; | |
3265 | ||
3266 | /* Allocate memory for this devices private data. */ | |
3267 | dd = kzalloc(sizeof(struct driver_data), GFP_KERNEL); | |
3268 | if (dd == NULL) { | |
3269 | dev_err(&pdev->dev, | |
3270 | "Unable to allocate memory for driver data\n"); | |
3271 | return -ENOMEM; | |
3272 | } | |
3273 | ||
3274 | /* Set the atomic variable as 1 in case of SRSI */ | |
3275 | atomic_set(&dd->drv_cleanup_done, true); | |
3276 | ||
3277 | atomic_set(&dd->resumeflag, false); | |
3278 | atomic_set(&dd->eh_active, 0); | |
3279 | ||
3280 | /* Attach the private data to this PCI device. */ | |
3281 | pci_set_drvdata(pdev, dd); | |
3282 | ||
3283 | rv = pcim_enable_device(pdev); | |
3284 | if (rv < 0) { | |
3285 | dev_err(&pdev->dev, "Unable to enable device\n"); | |
3286 | goto iomap_err; | |
3287 | } | |
3288 | ||
3289 | /* Map BAR5 to memory. */ | |
3290 | rv = pcim_iomap_regions(pdev, 1 << MTIP_ABAR, MTIP_DRV_NAME); | |
3291 | if (rv < 0) { | |
3292 | dev_err(&pdev->dev, "Unable to map regions\n"); | |
3293 | goto iomap_err; | |
3294 | } | |
3295 | ||
3296 | if (!pci_set_dma_mask(pdev, DMA_BIT_MASK(64))) { | |
3297 | rv = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); | |
3298 | ||
3299 | if (rv) { | |
3300 | rv = pci_set_consistent_dma_mask(pdev, | |
3301 | DMA_BIT_MASK(32)); | |
3302 | if (rv) { | |
3303 | dev_warn(&pdev->dev, | |
3304 | "64-bit DMA enable failed\n"); | |
3305 | goto setmask_err; | |
3306 | } | |
3307 | } | |
3308 | } | |
3309 | ||
3310 | pci_set_master(pdev); | |
3311 | ||
3312 | if (pci_enable_msi(pdev)) { | |
3313 | dev_warn(&pdev->dev, | |
3314 | "Unable to enable MSI interrupt.\n"); | |
3315 | goto block_initialize_err; | |
3316 | } | |
3317 | ||
3318 | /* Copy the info we may need later into the private data structure. */ | |
3319 | dd->major = mtip_major; | |
3320 | dd->protocol = ent->driver_data; | |
3321 | dd->instance = instance; | |
3322 | dd->pdev = pdev; | |
3323 | ||
3324 | /* Initialize the block layer. */ | |
3325 | rv = mtip_block_initialize(dd); | |
3326 | if (rv < 0) { | |
3327 | dev_err(&pdev->dev, | |
3328 | "Unable to initialize block layer\n"); | |
3329 | goto block_initialize_err; | |
3330 | } | |
3331 | ||
3332 | /* | |
3333 | * Increment the instance count so that each device has a unique | |
3334 | * instance number. | |
3335 | */ | |
3336 | instance++; | |
3337 | ||
3338 | goto done; | |
3339 | ||
3340 | block_initialize_err: | |
3341 | pci_disable_msi(pdev); | |
3342 | ||
3343 | setmask_err: | |
3344 | pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); | |
3345 | ||
3346 | iomap_err: | |
3347 | kfree(dd); | |
3348 | pci_set_drvdata(pdev, NULL); | |
3349 | return rv; | |
3350 | done: | |
3351 | /* Set the atomic variable as 0 in case of SRSI */ | |
3352 | atomic_set(&dd->drv_cleanup_done, true); | |
3353 | ||
3354 | return rv; | |
3355 | } | |
3356 | ||
3357 | /* | |
3358 | * Called for each probed device when the device is removed or the | |
3359 | * driver is unloaded. | |
3360 | * | |
3361 | * return value | |
3362 | * None | |
3363 | */ | |
3364 | static void mtip_pci_remove(struct pci_dev *pdev) | |
3365 | { | |
3366 | struct driver_data *dd = pci_get_drvdata(pdev); | |
3367 | int counter = 0; | |
3368 | ||
3369 | if (mtip_check_surprise_removal(pdev)) { | |
3370 | while (atomic_read(&dd->drv_cleanup_done) == false) { | |
3371 | counter++; | |
3372 | msleep(20); | |
3373 | if (counter == 10) { | |
3374 | /* Cleanup the outstanding commands */ | |
3375 | mtip_command_cleanup(dd); | |
3376 | break; | |
3377 | } | |
3378 | } | |
3379 | } | |
3380 | /* Set the atomic variable as 1 in case of SRSI */ | |
3381 | atomic_set(&dd->drv_cleanup_done, true); | |
3382 | ||
3383 | /* Clean up the block layer. */ | |
3384 | mtip_block_remove(dd); | |
3385 | ||
3386 | pci_disable_msi(pdev); | |
3387 | ||
3388 | kfree(dd); | |
3389 | pcim_iounmap_regions(pdev, 1 << MTIP_ABAR); | |
3390 | } | |
3391 | ||
3392 | /* | |
3393 | * Called for each probed device when the device is suspended. | |
3394 | * | |
3395 | * return value | |
3396 | * 0 Success | |
3397 | * <0 Error | |
3398 | */ | |
3399 | static int mtip_pci_suspend(struct pci_dev *pdev, pm_message_t mesg) | |
3400 | { | |
3401 | int rv = 0; | |
3402 | struct driver_data *dd = pci_get_drvdata(pdev); | |
3403 | ||
3404 | if (!dd) { | |
3405 | dev_err(&pdev->dev, | |
3406 | "Driver private datastructure is NULL\n"); | |
3407 | return -EFAULT; | |
3408 | } | |
3409 | ||
3410 | atomic_set(&dd->resumeflag, true); | |
3411 | ||
3412 | /* Disable ports & interrupts then send standby immediate */ | |
3413 | rv = mtip_block_suspend(dd); | |
3414 | if (rv < 0) { | |
3415 | dev_err(&pdev->dev, | |
3416 | "Failed to suspend controller\n"); | |
3417 | return rv; | |
3418 | } | |
3419 | ||
3420 | /* | |
3421 | * Save the pci config space to pdev structure & | |
3422 | * disable the device | |
3423 | */ | |
3424 | pci_save_state(pdev); | |
3425 | pci_disable_device(pdev); | |
3426 | ||
3427 | /* Move to Low power state*/ | |
3428 | pci_set_power_state(pdev, PCI_D3hot); | |
3429 | ||
3430 | return rv; | |
3431 | } | |
3432 | ||
3433 | /* | |
3434 | * Called for each probed device when the device is resumed. | |
3435 | * | |
3436 | * return value | |
3437 | * 0 Success | |
3438 | * <0 Error | |
3439 | */ | |
3440 | static int mtip_pci_resume(struct pci_dev *pdev) | |
3441 | { | |
3442 | int rv = 0; | |
3443 | struct driver_data *dd; | |
3444 | ||
3445 | dd = pci_get_drvdata(pdev); | |
3446 | if (!dd) { | |
3447 | dev_err(&pdev->dev, | |
3448 | "Driver private datastructure is NULL\n"); | |
3449 | return -EFAULT; | |
3450 | } | |
3451 | ||
3452 | /* Move the device to active State */ | |
3453 | pci_set_power_state(pdev, PCI_D0); | |
3454 | ||
3455 | /* Restore PCI configuration space */ | |
3456 | pci_restore_state(pdev); | |
3457 | ||
3458 | /* Enable the PCI device*/ | |
3459 | rv = pcim_enable_device(pdev); | |
3460 | if (rv < 0) { | |
3461 | dev_err(&pdev->dev, | |
3462 | "Failed to enable card during resume\n"); | |
3463 | goto err; | |
3464 | } | |
3465 | pci_set_master(pdev); | |
3466 | ||
3467 | /* | |
3468 | * Calls hbaReset, initPort, & startPort function | |
3469 | * then enables interrupts | |
3470 | */ | |
3471 | rv = mtip_block_resume(dd); | |
3472 | if (rv < 0) | |
3473 | dev_err(&pdev->dev, "Unable to resume\n"); | |
3474 | ||
3475 | err: | |
3476 | atomic_set(&dd->resumeflag, false); | |
3477 | ||
3478 | return rv; | |
3479 | } | |
3480 | ||
3481 | /* | |
3482 | * Shutdown routine | |
3483 | * | |
3484 | * return value | |
3485 | * None | |
3486 | */ | |
3487 | static void mtip_pci_shutdown(struct pci_dev *pdev) | |
3488 | { | |
3489 | struct driver_data *dd = pci_get_drvdata(pdev); | |
3490 | if (dd) | |
3491 | mtip_block_shutdown(dd); | |
3492 | } | |
3493 | ||
88523a61 SB |
3494 | /* Table of device ids supported by this driver. */ |
3495 | static DEFINE_PCI_DEVICE_TABLE(mtip_pci_tbl) = { | |
3496 | { PCI_DEVICE(PCI_VENDOR_ID_MICRON, P320_DEVICE_ID) }, | |
3497 | { 0 } | |
3498 | }; | |
3499 | ||
3500 | /* Structure that describes the PCI driver functions. */ | |
3ff147d3 | 3501 | static struct pci_driver mtip_pci_driver = { |
88523a61 SB |
3502 | .name = MTIP_DRV_NAME, |
3503 | .id_table = mtip_pci_tbl, | |
3504 | .probe = mtip_pci_probe, | |
3505 | .remove = mtip_pci_remove, | |
3506 | .suspend = mtip_pci_suspend, | |
3507 | .resume = mtip_pci_resume, | |
3508 | .shutdown = mtip_pci_shutdown, | |
3509 | }; | |
3510 | ||
3511 | MODULE_DEVICE_TABLE(pci, mtip_pci_tbl); | |
3512 | ||
3513 | /* | |
3514 | * Module initialization function. | |
3515 | * | |
3516 | * Called once when the module is loaded. This function allocates a major | |
3517 | * block device number to the Cyclone devices and registers the PCI layer | |
3518 | * of the driver. | |
3519 | * | |
3520 | * Return value | |
3521 | * 0 on success else error code. | |
3522 | */ | |
3523 | static int __init mtip_init(void) | |
3524 | { | |
3525 | printk(KERN_INFO MTIP_DRV_NAME " Version " MTIP_DRV_VERSION "\n"); | |
3526 | ||
3527 | /* Allocate a major block device number to use with this driver. */ | |
3528 | mtip_major = register_blkdev(0, MTIP_DRV_NAME); | |
3529 | if (mtip_major < 0) { | |
3530 | printk(KERN_ERR "Unable to register block device (%d)\n", | |
3531 | mtip_major); | |
3532 | return -EBUSY; | |
3533 | } | |
3534 | ||
3535 | /* Register our PCI operations. */ | |
3536 | return pci_register_driver(&mtip_pci_driver); | |
3537 | } | |
3538 | ||
3539 | /* | |
3540 | * Module de-initialization function. | |
3541 | * | |
3542 | * Called once when the module is unloaded. This function deallocates | |
3543 | * the major block device number allocated by mtip_init() and | |
3544 | * unregisters the PCI layer of the driver. | |
3545 | * | |
3546 | * Return value | |
3547 | * none | |
3548 | */ | |
3549 | static void __exit mtip_exit(void) | |
3550 | { | |
3551 | /* Release the allocated major block device number. */ | |
3552 | unregister_blkdev(mtip_major, MTIP_DRV_NAME); | |
3553 | ||
3554 | /* Unregister the PCI driver. */ | |
3555 | pci_unregister_driver(&mtip_pci_driver); | |
3556 | } | |
3557 | ||
3558 | MODULE_AUTHOR("Micron Technology, Inc"); | |
3559 | MODULE_DESCRIPTION("Micron RealSSD PCIe Block Driver"); | |
3560 | MODULE_LICENSE("GPL"); | |
3561 | MODULE_VERSION(MTIP_DRV_VERSION); | |
3562 | ||
3563 | module_init(mtip_init); | |
3564 | module_exit(mtip_exit); |