1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright 2018-2020 Broadcom.
4 */
5
6 #include <linux/delay.h>
7 #include <linux/dma-mapping.h>
8 #include <linux/firmware.h>
9 #include <linux/fs.h>
10 #include <linux/idr.h>
11 #include <linux/interrupt.h>
12 #include <linux/panic_notifier.h>
13 #include <linux/kref.h>
14 #include <linux/module.h>
15 #include <linux/mutex.h>
16 #include <linux/pci.h>
17 #include <linux/pci_regs.h>
18 #include <uapi/linux/misc/bcm_vk.h>
19
20 #include "bcm_vk.h"
21
22 #define PCI_DEVICE_ID_VALKYRIE 0x5e87
23 #define PCI_DEVICE_ID_VIPER 0x5e88
24
25 static DEFINE_IDA(bcm_vk_ida);
26
27 enum soc_idx {
28 VALKYRIE_A0 = 0,
29 VALKYRIE_B0,
30 VIPER,
31 VK_IDX_INVALID
32 };
33
34 enum img_idx {
35 IMG_PRI = 0,
36 IMG_SEC,
37 IMG_PER_TYPE_MAX
38 };
39
40 struct load_image_entry {
41 const u32 image_type;
42 const char *image_name[IMG_PER_TYPE_MAX];
43 };
44
45 #define NUM_BOOT_STAGES 2
46 /* default firmware images names */
47 static const struct load_image_entry image_tab[][NUM_BOOT_STAGES] = {
48 [VALKYRIE_A0] = {
49 {VK_IMAGE_TYPE_BOOT1, {"vk_a0-boot1.bin", "vk-boot1.bin"}},
50 {VK_IMAGE_TYPE_BOOT2, {"vk_a0-boot2.bin", "vk-boot2.bin"}}
51 },
52 [VALKYRIE_B0] = {
53 {VK_IMAGE_TYPE_BOOT1, {"vk_b0-boot1.bin", "vk-boot1.bin"}},
54 {VK_IMAGE_TYPE_BOOT2, {"vk_b0-boot2.bin", "vk-boot2.bin"}}
55 },
56
57 [VIPER] = {
58 {VK_IMAGE_TYPE_BOOT1, {"vp-boot1.bin", ""}},
59 {VK_IMAGE_TYPE_BOOT2, {"vp-boot2.bin", ""}}
60 },
61 };
62
63 /* Location of memory base addresses of interest in BAR1 */
64 /* Load Boot1 to start of ITCM */
65 #define BAR1_CODEPUSH_BASE_BOOT1 0x100000
66
67 /* Allow minimum 1s for Load Image timeout responses */
68 #define LOAD_IMAGE_TIMEOUT_MS (1 * MSEC_PER_SEC)
69
70 /* Image startup timeouts */
71 #define BOOT1_STARTUP_TIMEOUT_MS (5 * MSEC_PER_SEC)
72 #define BOOT2_STARTUP_TIMEOUT_MS (10 * MSEC_PER_SEC)
73
74 /* 1ms wait for checking the transfer complete status */
75 #define TXFR_COMPLETE_TIMEOUT_MS 1
76
77 /* MSIX usages */
78 #define VK_MSIX_MSGQ_MAX 3
79 #define VK_MSIX_NOTF_MAX 1
80 #define VK_MSIX_TTY_MAX BCM_VK_NUM_TTY
81 #define VK_MSIX_IRQ_MAX (VK_MSIX_MSGQ_MAX + VK_MSIX_NOTF_MAX + \
82 VK_MSIX_TTY_MAX)
83 #define VK_MSIX_IRQ_MIN_REQ (VK_MSIX_MSGQ_MAX + VK_MSIX_NOTF_MAX)
84
85 /* Number of bits set in DMA mask*/
86 #define BCM_VK_DMA_BITS 64
87
88 /* Ucode boot wait time */
89 #define BCM_VK_UCODE_BOOT_US (100 * USEC_PER_MSEC)
90 /* 50% margin */
91 #define BCM_VK_UCODE_BOOT_MAX_US ((BCM_VK_UCODE_BOOT_US * 3) >> 1)
92
93 /* deinit time for the card os after receiving doorbell */
94 #define BCM_VK_DEINIT_TIME_MS (2 * MSEC_PER_SEC)
95
96 /*
97 * module parameters
98 */
99 static bool auto_load = true;
100 module_param(auto_load, bool, 0444);
101 MODULE_PARM_DESC(auto_load,
102 "Load images automatically at PCIe probe time.\n");
103 static uint nr_scratch_pages = VK_BAR1_SCRATCH_DEF_NR_PAGES;
104 module_param(nr_scratch_pages, uint, 0444);
105 MODULE_PARM_DESC(nr_scratch_pages,
106 "Number of pre allocated DMAable coherent pages.\n");
107 static uint nr_ib_sgl_blk = BCM_VK_DEF_IB_SGL_BLK_LEN;
108 module_param(nr_ib_sgl_blk, uint, 0444);
109 MODULE_PARM_DESC(nr_ib_sgl_blk,
110 "Number of in-band msg blks for short SGL.\n");
111
112 /*
113 * alerts that could be generated from peer
114 */
115 const struct bcm_vk_entry bcm_vk_peer_err[BCM_VK_PEER_ERR_NUM] = {
116 {ERR_LOG_UECC, ERR_LOG_UECC, "uecc"},
117 {ERR_LOG_SSIM_BUSY, ERR_LOG_SSIM_BUSY, "ssim_busy"},
118 {ERR_LOG_AFBC_BUSY, ERR_LOG_AFBC_BUSY, "afbc_busy"},
119 {ERR_LOG_HIGH_TEMP_ERR, ERR_LOG_HIGH_TEMP_ERR, "high_temp"},
120 {ERR_LOG_WDOG_TIMEOUT, ERR_LOG_WDOG_TIMEOUT, "wdog_timeout"},
121 {ERR_LOG_SYS_FAULT, ERR_LOG_SYS_FAULT, "sys_fault"},
122 {ERR_LOG_RAMDUMP, ERR_LOG_RAMDUMP, "ramdump"},
123 {ERR_LOG_COP_WDOG_TIMEOUT, ERR_LOG_COP_WDOG_TIMEOUT,
124 "cop_wdog_timeout"},
125 {ERR_LOG_MEM_ALLOC_FAIL, ERR_LOG_MEM_ALLOC_FAIL, "malloc_fail warn"},
126 {ERR_LOG_LOW_TEMP_WARN, ERR_LOG_LOW_TEMP_WARN, "low_temp warn"},
127 {ERR_LOG_ECC, ERR_LOG_ECC, "ecc"},
128 {ERR_LOG_IPC_DWN, ERR_LOG_IPC_DWN, "ipc_down"},
129 };
130
131 /* alerts detected by the host */
132 const struct bcm_vk_entry bcm_vk_host_err[BCM_VK_HOST_ERR_NUM] = {
133 {ERR_LOG_HOST_PCIE_DWN, ERR_LOG_HOST_PCIE_DWN, "PCIe_down"},
134 {ERR_LOG_HOST_HB_FAIL, ERR_LOG_HOST_HB_FAIL, "hb_fail"},
135 {ERR_LOG_HOST_INTF_V_FAIL, ERR_LOG_HOST_INTF_V_FAIL, "intf_ver_fail"},
136 };
137
bcm_vk_notf_irqhandler(int irq,void * dev_id)138 irqreturn_t bcm_vk_notf_irqhandler(int irq, void *dev_id)
139 {
140 struct bcm_vk *vk = dev_id;
141
142 if (!bcm_vk_drv_access_ok(vk)) {
143 dev_err(&vk->pdev->dev,
144 "Interrupt %d received when msgq not inited\n", irq);
145 goto skip_schedule_work;
146 }
147
148 /* if notification is not pending, set bit and schedule work */
149 if (test_and_set_bit(BCM_VK_WQ_NOTF_PEND, vk->wq_offload) == 0)
150 queue_work(vk->wq_thread, &vk->wq_work);
151
152 skip_schedule_work:
153 return IRQ_HANDLED;
154 }
155
bcm_vk_intf_ver_chk(struct bcm_vk * vk)156 static int bcm_vk_intf_ver_chk(struct bcm_vk *vk)
157 {
158 struct device *dev = &vk->pdev->dev;
159 u32 reg;
160 u16 major, minor;
161 int ret = 0;
162
163 /* read interface register */
164 reg = vkread32(vk, BAR_0, BAR_INTF_VER);
165 major = (reg >> BAR_INTF_VER_MAJOR_SHIFT) & BAR_INTF_VER_MASK;
166 minor = reg & BAR_INTF_VER_MASK;
167
168 /*
169 * if major number is 0, it is pre-release and it would be allowed
170 * to continue, else, check versions accordingly
171 */
172 if (!major) {
173 dev_warn(dev, "Pre-release major.minor=%d.%d - drv %d.%d\n",
174 major, minor, SEMANTIC_MAJOR, SEMANTIC_MINOR);
175 } else if (major != SEMANTIC_MAJOR) {
176 dev_err(dev,
177 "Intf major.minor=%d.%d rejected - drv %d.%d\n",
178 major, minor, SEMANTIC_MAJOR, SEMANTIC_MINOR);
179 bcm_vk_set_host_alert(vk, ERR_LOG_HOST_INTF_V_FAIL);
180 ret = -EPFNOSUPPORT;
181 } else {
182 dev_dbg(dev,
183 "Intf major.minor=%d.%d passed - drv %d.%d\n",
184 major, minor, SEMANTIC_MAJOR, SEMANTIC_MINOR);
185 }
186 return ret;
187 }
188
bcm_vk_log_notf(struct bcm_vk * vk,struct bcm_vk_alert * alert,struct bcm_vk_entry const * entry_tab,const u32 table_size)189 static void bcm_vk_log_notf(struct bcm_vk *vk,
190 struct bcm_vk_alert *alert,
191 struct bcm_vk_entry const *entry_tab,
192 const u32 table_size)
193 {
194 u32 i;
195 u32 masked_val, latched_val;
196 struct bcm_vk_entry const *entry;
197 u32 reg;
198 u16 ecc_mem_err, uecc_mem_err;
199 struct device *dev = &vk->pdev->dev;
200
201 for (i = 0; i < table_size; i++) {
202 entry = &entry_tab[i];
203 masked_val = entry->mask & alert->notfs;
204 latched_val = entry->mask & alert->flags;
205
206 if (masked_val == ERR_LOG_UECC) {
207 /*
208 * if there is difference between stored cnt and it
209 * is greater than threshold, log it.
210 */
211 reg = vkread32(vk, BAR_0, BAR_CARD_ERR_MEM);
212 BCM_VK_EXTRACT_FIELD(uecc_mem_err, reg,
213 BCM_VK_MEM_ERR_FIELD_MASK,
214 BCM_VK_UECC_MEM_ERR_SHIFT);
215 if ((uecc_mem_err != vk->alert_cnts.uecc) &&
216 (uecc_mem_err >= BCM_VK_UECC_THRESHOLD))
217 dev_info(dev,
218 "ALERT! %s.%d uecc RAISED - ErrCnt %d\n",
219 DRV_MODULE_NAME, vk->devid,
220 uecc_mem_err);
221 vk->alert_cnts.uecc = uecc_mem_err;
222 } else if (masked_val == ERR_LOG_ECC) {
223 reg = vkread32(vk, BAR_0, BAR_CARD_ERR_MEM);
224 BCM_VK_EXTRACT_FIELD(ecc_mem_err, reg,
225 BCM_VK_MEM_ERR_FIELD_MASK,
226 BCM_VK_ECC_MEM_ERR_SHIFT);
227 if ((ecc_mem_err != vk->alert_cnts.ecc) &&
228 (ecc_mem_err >= BCM_VK_ECC_THRESHOLD))
229 dev_info(dev, "ALERT! %s.%d ecc RAISED - ErrCnt %d\n",
230 DRV_MODULE_NAME, vk->devid,
231 ecc_mem_err);
232 vk->alert_cnts.ecc = ecc_mem_err;
233 } else if (masked_val != latched_val) {
234 /* print a log as info */
235 dev_info(dev, "ALERT! %s.%d %s %s\n",
236 DRV_MODULE_NAME, vk->devid, entry->str,
237 masked_val ? "RAISED" : "CLEARED");
238 }
239 }
240 }
241
bcm_vk_dump_peer_log(struct bcm_vk * vk)242 static void bcm_vk_dump_peer_log(struct bcm_vk *vk)
243 {
244 struct bcm_vk_peer_log log;
245 struct bcm_vk_peer_log *log_info = &vk->peerlog_info;
246 char loc_buf[BCM_VK_PEER_LOG_LINE_MAX];
247 int cnt;
248 struct device *dev = &vk->pdev->dev;
249 unsigned int data_offset;
250
251 memcpy_fromio(&log, vk->bar[BAR_2] + vk->peerlog_off, sizeof(log));
252
253 dev_dbg(dev, "Peer PANIC: Size 0x%x(0x%x), [Rd Wr] = [%d %d]\n",
254 log.buf_size, log.mask, log.rd_idx, log.wr_idx);
255
256 if (!log_info->buf_size) {
257 dev_err(dev, "Peer log dump disabled - skipped!\n");
258 return;
259 }
260
261 /* perform range checking for rd/wr idx */
262 if ((log.rd_idx > log_info->mask) ||
263 (log.wr_idx > log_info->mask) ||
264 (log.buf_size != log_info->buf_size) ||
265 (log.mask != log_info->mask)) {
266 dev_err(dev,
267 "Corrupted Ptrs: Size 0x%x(0x%x) Mask 0x%x(0x%x) [Rd Wr] = [%d %d], skip log dump.\n",
268 log_info->buf_size, log.buf_size,
269 log_info->mask, log.mask,
270 log.rd_idx, log.wr_idx);
271 return;
272 }
273
274 cnt = 0;
275 data_offset = vk->peerlog_off + sizeof(struct bcm_vk_peer_log);
276 loc_buf[BCM_VK_PEER_LOG_LINE_MAX - 1] = '\0';
277 while (log.rd_idx != log.wr_idx) {
278 loc_buf[cnt] = vkread8(vk, BAR_2, data_offset + log.rd_idx);
279
280 if ((loc_buf[cnt] == '\0') ||
281 (cnt == (BCM_VK_PEER_LOG_LINE_MAX - 1))) {
282 dev_err(dev, "%s", loc_buf);
283 cnt = 0;
284 } else {
285 cnt++;
286 }
287 log.rd_idx = (log.rd_idx + 1) & log.mask;
288 }
289 /* update rd idx at the end */
290 vkwrite32(vk, log.rd_idx, BAR_2,
291 vk->peerlog_off + offsetof(struct bcm_vk_peer_log, rd_idx));
292 }
293
bcm_vk_handle_notf(struct bcm_vk * vk)294 void bcm_vk_handle_notf(struct bcm_vk *vk)
295 {
296 u32 reg;
297 struct bcm_vk_alert alert;
298 bool intf_down;
299 unsigned long flags;
300
301 /* handle peer alerts and then locally detected ones */
302 reg = vkread32(vk, BAR_0, BAR_CARD_ERR_LOG);
303 intf_down = BCM_VK_INTF_IS_DOWN(reg);
304 if (!intf_down) {
305 vk->peer_alert.notfs = reg;
306 bcm_vk_log_notf(vk, &vk->peer_alert, bcm_vk_peer_err,
307 ARRAY_SIZE(bcm_vk_peer_err));
308 vk->peer_alert.flags = vk->peer_alert.notfs;
309 } else {
310 /* turn off access */
311 bcm_vk_blk_drv_access(vk);
312 }
313
314 /* check and make copy of alert with lock and then free lock */
315 spin_lock_irqsave(&vk->host_alert_lock, flags);
316 if (intf_down)
317 vk->host_alert.notfs |= ERR_LOG_HOST_PCIE_DWN;
318
319 alert = vk->host_alert;
320 vk->host_alert.flags = vk->host_alert.notfs;
321 spin_unlock_irqrestore(&vk->host_alert_lock, flags);
322
323 /* call display with copy */
324 bcm_vk_log_notf(vk, &alert, bcm_vk_host_err,
325 ARRAY_SIZE(bcm_vk_host_err));
326
327 /*
328 * If it is a sys fault or heartbeat timeout, we would like extract
329 * log msg from the card so that we would know what is the last fault
330 */
331 if (!intf_down &&
332 ((vk->host_alert.flags & ERR_LOG_HOST_HB_FAIL) ||
333 (vk->peer_alert.flags & ERR_LOG_SYS_FAULT)))
334 bcm_vk_dump_peer_log(vk);
335 }
336
bcm_vk_wait(struct bcm_vk * vk,enum pci_barno bar,u64 offset,u32 mask,u32 value,unsigned long timeout_ms)337 static inline int bcm_vk_wait(struct bcm_vk *vk, enum pci_barno bar,
338 u64 offset, u32 mask, u32 value,
339 unsigned long timeout_ms)
340 {
341 struct device *dev = &vk->pdev->dev;
342 unsigned long start_time;
343 unsigned long timeout;
344 u32 rd_val, boot_status;
345
346 start_time = jiffies;
347 timeout = start_time + msecs_to_jiffies(timeout_ms);
348
349 do {
350 rd_val = vkread32(vk, bar, offset);
351 dev_dbg(dev, "BAR%d Offset=0x%llx: 0x%x\n",
352 bar, offset, rd_val);
353
354 /* check for any boot err condition */
355 boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS);
356 if (boot_status & BOOT_ERR_MASK) {
357 dev_err(dev, "Boot Err 0x%x, progress 0x%x after %d ms\n",
358 (boot_status & BOOT_ERR_MASK) >> BOOT_ERR_SHIFT,
359 boot_status & BOOT_PROG_MASK,
360 jiffies_to_msecs(jiffies - start_time));
361 return -EFAULT;
362 }
363
364 if (time_after(jiffies, timeout))
365 return -ETIMEDOUT;
366
367 cpu_relax();
368 cond_resched();
369 } while ((rd_val & mask) != value);
370
371 return 0;
372 }
373
bcm_vk_get_card_info(struct bcm_vk * vk)374 static void bcm_vk_get_card_info(struct bcm_vk *vk)
375 {
376 struct device *dev = &vk->pdev->dev;
377 u32 offset;
378 int i;
379 u8 *dst;
380 struct bcm_vk_card_info *info = &vk->card_info;
381
382 /* first read the offset from spare register */
383 offset = vkread32(vk, BAR_0, BAR_CARD_STATIC_INFO);
384 offset &= (pci_resource_len(vk->pdev, BAR_2 * 2) - 1);
385
386 /* based on the offset, read info to internal card info structure */
387 dst = (u8 *)info;
388 for (i = 0; i < sizeof(*info); i++)
389 *dst++ = vkread8(vk, BAR_2, offset++);
390
391 #define CARD_INFO_LOG_FMT "version : %x\n" \
392 "os_tag : %s\n" \
393 "cmpt_tag : %s\n" \
394 "cpu_freq : %d MHz\n" \
395 "cpu_scale : %d full, %d lowest\n" \
396 "ddr_freq : %d MHz\n" \
397 "ddr_size : %d MB\n" \
398 "video_freq: %d MHz\n"
399 dev_dbg(dev, CARD_INFO_LOG_FMT, info->version, info->os_tag,
400 info->cmpt_tag, info->cpu_freq_mhz, info->cpu_scale[0],
401 info->cpu_scale[MAX_OPP - 1], info->ddr_freq_mhz,
402 info->ddr_size_MB, info->video_core_freq_mhz);
403
404 /*
405 * get the peer log pointer, only need the offset, and get record
406 * of the log buffer information which would be used for checking
407 * before dump, in case the BAR2 memory has been corrupted.
408 */
409 vk->peerlog_off = offset;
410 memcpy_fromio(&vk->peerlog_info, vk->bar[BAR_2] + vk->peerlog_off,
411 sizeof(vk->peerlog_info));
412
413 /*
414 * Do a range checking and if out of bound, the record will be zeroed
415 * which guarantees that nothing would be dumped. In other words,
416 * peer dump is disabled.
417 */
418 if ((vk->peerlog_info.buf_size > BCM_VK_PEER_LOG_BUF_MAX) ||
419 (vk->peerlog_info.mask != (vk->peerlog_info.buf_size - 1)) ||
420 (vk->peerlog_info.rd_idx > vk->peerlog_info.mask) ||
421 (vk->peerlog_info.wr_idx > vk->peerlog_info.mask)) {
422 dev_err(dev, "Peer log disabled - range error: Size 0x%x(0x%x), [Rd Wr] = [%d %d]\n",
423 vk->peerlog_info.buf_size,
424 vk->peerlog_info.mask,
425 vk->peerlog_info.rd_idx,
426 vk->peerlog_info.wr_idx);
427 memset(&vk->peerlog_info, 0, sizeof(vk->peerlog_info));
428 } else {
429 dev_dbg(dev, "Peer log: Size 0x%x(0x%x), [Rd Wr] = [%d %d]\n",
430 vk->peerlog_info.buf_size,
431 vk->peerlog_info.mask,
432 vk->peerlog_info.rd_idx,
433 vk->peerlog_info.wr_idx);
434 }
435 }
436
bcm_vk_get_proc_mon_info(struct bcm_vk * vk)437 static void bcm_vk_get_proc_mon_info(struct bcm_vk *vk)
438 {
439 struct device *dev = &vk->pdev->dev;
440 struct bcm_vk_proc_mon_info *mon = &vk->proc_mon_info;
441 u32 num, entry_size, offset, buf_size;
442 u8 *dst;
443
444 /* calculate offset which is based on peerlog offset */
445 buf_size = vkread32(vk, BAR_2,
446 vk->peerlog_off
447 + offsetof(struct bcm_vk_peer_log, buf_size));
448 offset = vk->peerlog_off + sizeof(struct bcm_vk_peer_log)
449 + buf_size;
450
451 /* first read the num and entry size */
452 num = vkread32(vk, BAR_2, offset);
453 entry_size = vkread32(vk, BAR_2, offset + sizeof(num));
454
455 /* check for max allowed */
456 if (num > BCM_VK_PROC_MON_MAX) {
457 dev_err(dev, "Processing monitoring entry %d exceeds max %d\n",
458 num, BCM_VK_PROC_MON_MAX);
459 return;
460 }
461 mon->num = num;
462 mon->entry_size = entry_size;
463
464 vk->proc_mon_off = offset;
465
466 /* read it once that will capture those static info */
467 dst = (u8 *)&mon->entries[0];
468 offset += sizeof(num) + sizeof(entry_size);
469 memcpy_fromio(dst, vk->bar[BAR_2] + offset, num * entry_size);
470 }
471
bcm_vk_sync_card_info(struct bcm_vk * vk)472 static int bcm_vk_sync_card_info(struct bcm_vk *vk)
473 {
474 u32 rdy_marker = vkread32(vk, BAR_1, VK_BAR1_MSGQ_DEF_RDY);
475
476 /* check for marker, but allow diags mode to skip sync */
477 if (!bcm_vk_msgq_marker_valid(vk))
478 return (rdy_marker == VK_BAR1_DIAG_RDY_MARKER ? 0 : -EINVAL);
479
480 /*
481 * Write down scratch addr which is used for DMA. For
482 * signed part, BAR1 is accessible only after boot2 has come
483 * up
484 */
485 if (vk->tdma_addr) {
486 vkwrite32(vk, (u64)vk->tdma_addr >> 32, BAR_1,
487 VK_BAR1_SCRATCH_OFF_HI);
488 vkwrite32(vk, (u32)vk->tdma_addr, BAR_1,
489 VK_BAR1_SCRATCH_OFF_LO);
490 vkwrite32(vk, nr_scratch_pages * PAGE_SIZE, BAR_1,
491 VK_BAR1_SCRATCH_SZ_ADDR);
492 }
493
494 /* get static card info, only need to read once */
495 bcm_vk_get_card_info(vk);
496
497 /* get the proc mon info once */
498 bcm_vk_get_proc_mon_info(vk);
499
500 return 0;
501 }
502
bcm_vk_blk_drv_access(struct bcm_vk * vk)503 void bcm_vk_blk_drv_access(struct bcm_vk *vk)
504 {
505 int i;
506
507 /*
508 * kill all the apps except for the process that is resetting.
509 * If not called during reset, reset_pid will be 0, and all will be
510 * killed.
511 */
512 spin_lock(&vk->ctx_lock);
513
514 /* set msgq_inited to 0 so that all rd/wr will be blocked */
515 atomic_set(&vk->msgq_inited, 0);
516
517 for (i = 0; i < VK_PID_HT_SZ; i++) {
518 struct bcm_vk_ctx *ctx;
519
520 list_for_each_entry(ctx, &vk->pid_ht[i].head, node) {
521 if (ctx->pid != vk->reset_pid) {
522 dev_dbg(&vk->pdev->dev,
523 "Send kill signal to pid %d\n",
524 ctx->pid);
525 kill_pid(find_vpid(ctx->pid), SIGKILL, 1);
526 }
527 }
528 }
529 bcm_vk_tty_terminate_tty_user(vk);
530 spin_unlock(&vk->ctx_lock);
531 }
532
bcm_vk_buf_notify(struct bcm_vk * vk,void * bufp,dma_addr_t host_buf_addr,u32 buf_size)533 static void bcm_vk_buf_notify(struct bcm_vk *vk, void *bufp,
534 dma_addr_t host_buf_addr, u32 buf_size)
535 {
536 /* update the dma address to the card */
537 vkwrite32(vk, (u64)host_buf_addr >> 32, BAR_1,
538 VK_BAR1_DMA_BUF_OFF_HI);
539 vkwrite32(vk, (u32)host_buf_addr, BAR_1,
540 VK_BAR1_DMA_BUF_OFF_LO);
541 vkwrite32(vk, buf_size, BAR_1, VK_BAR1_DMA_BUF_SZ);
542 }
543
bcm_vk_load_image_by_type(struct bcm_vk * vk,u32 load_type,const char * filename)544 static int bcm_vk_load_image_by_type(struct bcm_vk *vk, u32 load_type,
545 const char *filename)
546 {
547 struct device *dev = &vk->pdev->dev;
548 const struct firmware *fw = NULL;
549 void *bufp = NULL;
550 size_t max_buf, offset;
551 int ret;
552 u64 offset_codepush;
553 u32 codepush;
554 u32 value;
555 dma_addr_t boot_dma_addr;
556 bool is_stdalone;
557
558 if (load_type == VK_IMAGE_TYPE_BOOT1) {
559 /*
560 * After POR, enable VK soft BOOTSRC so bootrom do not clear
561 * the pushed image (the TCM memories).
562 */
563 value = vkread32(vk, BAR_0, BAR_BOOTSRC_SELECT);
564 value |= BOOTSRC_SOFT_ENABLE;
565 vkwrite32(vk, value, BAR_0, BAR_BOOTSRC_SELECT);
566
567 codepush = CODEPUSH_BOOTSTART + CODEPUSH_BOOT1_ENTRY;
568 offset_codepush = BAR_CODEPUSH_SBL;
569
570 /* Write a 1 to request SRAM open bit */
571 vkwrite32(vk, CODEPUSH_BOOTSTART, BAR_0, offset_codepush);
572
573 /* Wait for VK to respond */
574 ret = bcm_vk_wait(vk, BAR_0, BAR_BOOT_STATUS, SRAM_OPEN,
575 SRAM_OPEN, LOAD_IMAGE_TIMEOUT_MS);
576 if (ret < 0) {
577 dev_err(dev, "boot1 wait SRAM err - ret(%d)\n", ret);
578 goto err_buf_out;
579 }
580
581 max_buf = SZ_256K;
582 bufp = dma_alloc_coherent(dev,
583 max_buf,
584 &boot_dma_addr, GFP_KERNEL);
585 if (!bufp) {
586 dev_err(dev, "Error allocating 0x%zx\n", max_buf);
587 ret = -ENOMEM;
588 goto err_buf_out;
589 }
590 } else if (load_type == VK_IMAGE_TYPE_BOOT2) {
591 codepush = CODEPUSH_BOOT2_ENTRY;
592 offset_codepush = BAR_CODEPUSH_SBI;
593
594 /* Wait for VK to respond */
595 ret = bcm_vk_wait(vk, BAR_0, BAR_BOOT_STATUS, DDR_OPEN,
596 DDR_OPEN, LOAD_IMAGE_TIMEOUT_MS);
597 if (ret < 0) {
598 dev_err(dev, "boot2 wait DDR open error - ret(%d)\n",
599 ret);
600 goto err_buf_out;
601 }
602
603 max_buf = SZ_4M;
604 bufp = dma_alloc_coherent(dev,
605 max_buf,
606 &boot_dma_addr, GFP_KERNEL);
607 if (!bufp) {
608 dev_err(dev, "Error allocating 0x%zx\n", max_buf);
609 ret = -ENOMEM;
610 goto err_buf_out;
611 }
612
613 bcm_vk_buf_notify(vk, bufp, boot_dma_addr, max_buf);
614 } else {
615 dev_err(dev, "Error invalid image type 0x%x\n", load_type);
616 ret = -EINVAL;
617 goto err_buf_out;
618 }
619
620 offset = 0;
621 ret = request_partial_firmware_into_buf(&fw, filename, dev,
622 bufp, max_buf, offset);
623 if (ret) {
624 dev_err(dev, "Error %d requesting firmware file: %s\n",
625 ret, filename);
626 goto err_firmware_out;
627 }
628 dev_dbg(dev, "size=0x%zx\n", fw->size);
629 if (load_type == VK_IMAGE_TYPE_BOOT1)
630 memcpy_toio(vk->bar[BAR_1] + BAR1_CODEPUSH_BASE_BOOT1,
631 bufp,
632 fw->size);
633
634 dev_dbg(dev, "Signaling 0x%x to 0x%llx\n", codepush, offset_codepush);
635 vkwrite32(vk, codepush, BAR_0, offset_codepush);
636
637 if (load_type == VK_IMAGE_TYPE_BOOT1) {
638 u32 boot_status;
639
640 /* wait until done */
641 ret = bcm_vk_wait(vk, BAR_0, BAR_BOOT_STATUS,
642 BOOT1_RUNNING,
643 BOOT1_RUNNING,
644 BOOT1_STARTUP_TIMEOUT_MS);
645
646 boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS);
647 is_stdalone = !BCM_VK_INTF_IS_DOWN(boot_status) &&
648 (boot_status & BOOT_STDALONE_RUNNING);
649 if (ret && !is_stdalone) {
650 dev_err(dev,
651 "Timeout %ld ms waiting for boot1 to come up - ret(%d)\n",
652 BOOT1_STARTUP_TIMEOUT_MS, ret);
653 goto err_firmware_out;
654 } else if (is_stdalone) {
655 u32 reg;
656
657 reg = vkread32(vk, BAR_0, BAR_BOOT1_STDALONE_PROGRESS);
658 if ((reg & BOOT1_STDALONE_PROGRESS_MASK) ==
659 BOOT1_STDALONE_SUCCESS) {
660 dev_info(dev, "Boot1 standalone success\n");
661 ret = 0;
662 } else {
663 dev_err(dev, "Timeout %ld ms - Boot1 standalone failure\n",
664 BOOT1_STARTUP_TIMEOUT_MS);
665 ret = -EINVAL;
666 goto err_firmware_out;
667 }
668 }
669 } else if (load_type == VK_IMAGE_TYPE_BOOT2) {
670 unsigned long timeout;
671
672 timeout = jiffies + msecs_to_jiffies(LOAD_IMAGE_TIMEOUT_MS);
673
674 /* To send more data to VK than max_buf allowed at a time */
675 do {
676 /*
677 * Check for ack from card. when Ack is received,
678 * it means all the data is received by card.
679 * Exit the loop after ack is received.
680 */
681 ret = bcm_vk_wait(vk, BAR_0, BAR_BOOT_STATUS,
682 FW_LOADER_ACK_RCVD_ALL_DATA,
683 FW_LOADER_ACK_RCVD_ALL_DATA,
684 TXFR_COMPLETE_TIMEOUT_MS);
685 if (ret == 0) {
686 dev_dbg(dev, "Exit boot2 download\n");
687 break;
688 } else if (ret == -EFAULT) {
689 dev_err(dev, "Error detected during ACK waiting");
690 goto err_firmware_out;
691 }
692
693 /* exit the loop, if there is no response from card */
694 if (time_after(jiffies, timeout)) {
695 dev_err(dev, "Error. No reply from card\n");
696 ret = -ETIMEDOUT;
697 goto err_firmware_out;
698 }
699
700 /* Wait for VK to open BAR space to copy new data */
701 ret = bcm_vk_wait(vk, BAR_0, offset_codepush,
702 codepush, 0,
703 TXFR_COMPLETE_TIMEOUT_MS);
704 if (ret == 0) {
705 offset += max_buf;
706 ret = request_partial_firmware_into_buf
707 (&fw,
708 filename,
709 dev, bufp,
710 max_buf,
711 offset);
712 if (ret) {
713 dev_err(dev,
714 "Error %d requesting firmware file: %s offset: 0x%zx\n",
715 ret, filename, offset);
716 goto err_firmware_out;
717 }
718 dev_dbg(dev, "size=0x%zx\n", fw->size);
719 dev_dbg(dev, "Signaling 0x%x to 0x%llx\n",
720 codepush, offset_codepush);
721 vkwrite32(vk, codepush, BAR_0, offset_codepush);
722 /* reload timeout after every codepush */
723 timeout = jiffies +
724 msecs_to_jiffies(LOAD_IMAGE_TIMEOUT_MS);
725 } else if (ret == -EFAULT) {
726 dev_err(dev, "Error detected waiting for transfer\n");
727 goto err_firmware_out;
728 }
729 } while (1);
730
731 /* wait for fw status bits to indicate app ready */
732 ret = bcm_vk_wait(vk, BAR_0, VK_BAR_FWSTS,
733 VK_FWSTS_READY,
734 VK_FWSTS_READY,
735 BOOT2_STARTUP_TIMEOUT_MS);
736 if (ret < 0) {
737 dev_err(dev, "Boot2 not ready - ret(%d)\n", ret);
738 goto err_firmware_out;
739 }
740
741 is_stdalone = vkread32(vk, BAR_0, BAR_BOOT_STATUS) &
742 BOOT_STDALONE_RUNNING;
743 if (!is_stdalone) {
744 ret = bcm_vk_intf_ver_chk(vk);
745 if (ret) {
746 dev_err(dev, "failure in intf version check\n");
747 goto err_firmware_out;
748 }
749
750 /*
751 * Next, initialize Message Q if we are loading boot2.
752 * Do a force sync
753 */
754 ret = bcm_vk_sync_msgq(vk, true);
755 if (ret) {
756 dev_err(dev, "Boot2 Error reading comm msg Q info\n");
757 ret = -EIO;
758 goto err_firmware_out;
759 }
760
761 /* sync & channel other info */
762 ret = bcm_vk_sync_card_info(vk);
763 if (ret) {
764 dev_err(dev, "Syncing Card Info failure\n");
765 goto err_firmware_out;
766 }
767 }
768 }
769
770 err_firmware_out:
771 release_firmware(fw);
772
773 err_buf_out:
774 if (bufp)
775 dma_free_coherent(dev, max_buf, bufp, boot_dma_addr);
776
777 return ret;
778 }
779
bcm_vk_next_boot_image(struct bcm_vk * vk)780 static u32 bcm_vk_next_boot_image(struct bcm_vk *vk)
781 {
782 u32 boot_status;
783 u32 fw_status;
784 u32 load_type = 0; /* default for unknown */
785
786 boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS);
787 fw_status = vkread32(vk, BAR_0, VK_BAR_FWSTS);
788
789 if (!BCM_VK_INTF_IS_DOWN(boot_status) && (boot_status & SRAM_OPEN))
790 load_type = VK_IMAGE_TYPE_BOOT1;
791 else if (boot_status == BOOT1_RUNNING)
792 load_type = VK_IMAGE_TYPE_BOOT2;
793
794 /* Log status so that we know different stages */
795 dev_info(&vk->pdev->dev,
796 "boot-status value for next image: 0x%x : fw-status 0x%x\n",
797 boot_status, fw_status);
798
799 return load_type;
800 }
801
get_soc_idx(struct bcm_vk * vk)802 static enum soc_idx get_soc_idx(struct bcm_vk *vk)
803 {
804 struct pci_dev *pdev = vk->pdev;
805 enum soc_idx idx = VK_IDX_INVALID;
806 u32 rev;
807 static enum soc_idx const vk_soc_tab[] = { VALKYRIE_A0, VALKYRIE_B0 };
808
809 switch (pdev->device) {
810 case PCI_DEVICE_ID_VALKYRIE:
811 /* get the chip id to decide sub-class */
812 rev = MAJOR_SOC_REV(vkread32(vk, BAR_0, BAR_CHIP_ID));
813 if (rev < ARRAY_SIZE(vk_soc_tab)) {
814 idx = vk_soc_tab[rev];
815 } else {
816 /* Default to A0 firmware for all other chip revs */
817 idx = VALKYRIE_A0;
818 dev_warn(&pdev->dev,
819 "Rev %d not in image lookup table, default to idx=%d\n",
820 rev, idx);
821 }
822 break;
823
824 case PCI_DEVICE_ID_VIPER:
825 idx = VIPER;
826 break;
827
828 default:
829 dev_err(&pdev->dev, "no images for 0x%x\n", pdev->device);
830 }
831 return idx;
832 }
833
get_load_fw_name(struct bcm_vk * vk,const struct load_image_entry * entry)834 static const char *get_load_fw_name(struct bcm_vk *vk,
835 const struct load_image_entry *entry)
836 {
837 const struct firmware *fw;
838 struct device *dev = &vk->pdev->dev;
839 int ret;
840 unsigned long dummy;
841 int i;
842
843 for (i = 0; i < IMG_PER_TYPE_MAX; i++) {
844 fw = NULL;
845 ret = request_partial_firmware_into_buf(&fw,
846 entry->image_name[i],
847 dev, &dummy,
848 sizeof(dummy),
849 0);
850 release_firmware(fw);
851 if (!ret)
852 return entry->image_name[i];
853 }
854 return NULL;
855 }
856
bcm_vk_auto_load_all_images(struct bcm_vk * vk)857 int bcm_vk_auto_load_all_images(struct bcm_vk *vk)
858 {
859 int i, ret = -1;
860 enum soc_idx idx;
861 struct device *dev = &vk->pdev->dev;
862 u32 curr_type;
863 const char *curr_name;
864
865 idx = get_soc_idx(vk);
866 if (idx == VK_IDX_INVALID)
867 goto auto_load_all_exit;
868
869 /* log a message to know the relative loading order */
870 dev_dbg(dev, "Load All for device %d\n", vk->devid);
871
872 for (i = 0; i < NUM_BOOT_STAGES; i++) {
873 curr_type = image_tab[idx][i].image_type;
874 if (bcm_vk_next_boot_image(vk) == curr_type) {
875 curr_name = get_load_fw_name(vk, &image_tab[idx][i]);
876 if (!curr_name) {
877 dev_err(dev, "No suitable firmware exists for type %d",
878 curr_type);
879 ret = -ENOENT;
880 goto auto_load_all_exit;
881 }
882 ret = bcm_vk_load_image_by_type(vk, curr_type,
883 curr_name);
884 dev_info(dev, "Auto load %s, ret %d\n",
885 curr_name, ret);
886
887 if (ret) {
888 dev_err(dev, "Error loading default %s\n",
889 curr_name);
890 goto auto_load_all_exit;
891 }
892 }
893 }
894
895 auto_load_all_exit:
896 return ret;
897 }
898
bcm_vk_trigger_autoload(struct bcm_vk * vk)899 static int bcm_vk_trigger_autoload(struct bcm_vk *vk)
900 {
901 if (test_and_set_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload) != 0)
902 return -EPERM;
903
904 set_bit(BCM_VK_WQ_DWNLD_AUTO, vk->wq_offload);
905 queue_work(vk->wq_thread, &vk->wq_work);
906
907 return 0;
908 }
909
910 /*
911 * deferred work queue for draining and auto download.
912 */
bcm_vk_wq_handler(struct work_struct * work)913 static void bcm_vk_wq_handler(struct work_struct *work)
914 {
915 struct bcm_vk *vk = container_of(work, struct bcm_vk, wq_work);
916 struct device *dev = &vk->pdev->dev;
917 s32 ret;
918
919 /* check wq offload bit map to perform various operations */
920 if (test_bit(BCM_VK_WQ_NOTF_PEND, vk->wq_offload)) {
921 /* clear bit right the way for notification */
922 clear_bit(BCM_VK_WQ_NOTF_PEND, vk->wq_offload);
923 bcm_vk_handle_notf(vk);
924 }
925 if (test_bit(BCM_VK_WQ_DWNLD_AUTO, vk->wq_offload)) {
926 bcm_vk_auto_load_all_images(vk);
927
928 /*
929 * at the end of operation, clear AUTO bit and pending
930 * bit
931 */
932 clear_bit(BCM_VK_WQ_DWNLD_AUTO, vk->wq_offload);
933 clear_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload);
934 }
935
936 /* next, try to drain */
937 ret = bcm_to_h_msg_dequeue(vk);
938
939 if (ret == 0)
940 dev_dbg(dev, "Spurious trigger for workqueue\n");
941 else if (ret < 0)
942 bcm_vk_blk_drv_access(vk);
943 }
944
bcm_vk_load_image(struct bcm_vk * vk,const struct vk_image __user * arg)945 static long bcm_vk_load_image(struct bcm_vk *vk,
946 const struct vk_image __user *arg)
947 {
948 struct device *dev = &vk->pdev->dev;
949 const char *image_name;
950 struct vk_image image;
951 u32 next_loadable;
952 enum soc_idx idx;
953 int image_idx;
954 int ret = -EPERM;
955
956 if (copy_from_user(&image, arg, sizeof(image)))
957 return -EACCES;
958
959 if ((image.type != VK_IMAGE_TYPE_BOOT1) &&
960 (image.type != VK_IMAGE_TYPE_BOOT2)) {
961 dev_err(dev, "invalid image.type %u\n", image.type);
962 return ret;
963 }
964
965 next_loadable = bcm_vk_next_boot_image(vk);
966 if (next_loadable != image.type) {
967 dev_err(dev, "Next expected image %u, Loading %u\n",
968 next_loadable, image.type);
969 return ret;
970 }
971
972 /*
973 * if something is pending download already. This could only happen
974 * for now when the driver is being loaded, or if someone has issued
975 * another download command in another shell.
976 */
977 if (test_and_set_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload) != 0) {
978 dev_err(dev, "Download operation already pending.\n");
979 return ret;
980 }
981
982 image_name = image.filename;
983 if (image_name[0] == '\0') {
984 /* Use default image name if NULL */
985 idx = get_soc_idx(vk);
986 if (idx == VK_IDX_INVALID)
987 goto err_idx;
988
989 /* Image idx starts with boot1 */
990 image_idx = image.type - VK_IMAGE_TYPE_BOOT1;
991 image_name = get_load_fw_name(vk, &image_tab[idx][image_idx]);
992 if (!image_name) {
993 dev_err(dev, "No suitable image found for type %d",
994 image.type);
995 ret = -ENOENT;
996 goto err_idx;
997 }
998 } else {
999 /* Ensure filename is NULL terminated */
1000 image.filename[sizeof(image.filename) - 1] = '\0';
1001 }
1002 ret = bcm_vk_load_image_by_type(vk, image.type, image_name);
1003 dev_info(dev, "Load %s, ret %d\n", image_name, ret);
1004 err_idx:
1005 clear_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload);
1006
1007 return ret;
1008 }
1009
bcm_vk_reset_successful(struct bcm_vk * vk)1010 static int bcm_vk_reset_successful(struct bcm_vk *vk)
1011 {
1012 struct device *dev = &vk->pdev->dev;
1013 u32 fw_status, reset_reason;
1014 int ret = -EAGAIN;
1015
1016 /*
1017 * Reset could be triggered when the card in several state:
1018 * i) in bootROM
1019 * ii) after boot1
1020 * iii) boot2 running
1021 *
1022 * i) & ii) - no status bits will be updated. If vkboot1
1023 * runs automatically after reset, it will update the reason
1024 * to be unknown reason
1025 * iii) - reboot reason match + deinit done.
1026 */
1027 fw_status = vkread32(vk, BAR_0, VK_BAR_FWSTS);
1028 /* immediate exit if interface goes down */
1029 if (BCM_VK_INTF_IS_DOWN(fw_status)) {
1030 dev_err(dev, "PCIe Intf Down!\n");
1031 goto reset_exit;
1032 }
1033
1034 reset_reason = (fw_status & VK_FWSTS_RESET_REASON_MASK);
1035 if ((reset_reason == VK_FWSTS_RESET_MBOX_DB) ||
1036 (reset_reason == VK_FWSTS_RESET_UNKNOWN))
1037 ret = 0;
1038
1039 /*
1040 * if some of the deinit bits are set, but done
1041 * bit is not, this is a failure if triggered while boot2 is running
1042 */
1043 if ((fw_status & VK_FWSTS_DEINIT_TRIGGERED) &&
1044 !(fw_status & VK_FWSTS_RESET_DONE))
1045 ret = -EAGAIN;
1046
1047 reset_exit:
1048 dev_dbg(dev, "FW status = 0x%x ret %d\n", fw_status, ret);
1049
1050 return ret;
1051 }
1052
bcm_to_v_reset_doorbell(struct bcm_vk * vk,u32 db_val)1053 static void bcm_to_v_reset_doorbell(struct bcm_vk *vk, u32 db_val)
1054 {
1055 vkwrite32(vk, db_val, BAR_0, VK_BAR0_RESET_DB_BASE);
1056 }
1057
bcm_vk_trigger_reset(struct bcm_vk * vk)1058 static int bcm_vk_trigger_reset(struct bcm_vk *vk)
1059 {
1060 u32 i;
1061 u32 value, boot_status;
1062 bool is_stdalone, is_boot2;
1063 static const u32 bar0_reg_clr_list[] = { BAR_OS_UPTIME,
1064 BAR_INTF_VER,
1065 BAR_CARD_VOLTAGE,
1066 BAR_CARD_TEMPERATURE,
1067 BAR_CARD_PWR_AND_THRE };
1068
1069 /* clean up before pressing the door bell */
1070 bcm_vk_drain_msg_on_reset(vk);
1071 vkwrite32(vk, 0, BAR_1, VK_BAR1_MSGQ_DEF_RDY);
1072 /* make tag '\0' terminated */
1073 vkwrite32(vk, 0, BAR_1, VK_BAR1_BOOT1_VER_TAG);
1074
1075 for (i = 0; i < VK_BAR1_DAUTH_MAX; i++) {
1076 vkwrite32(vk, 0, BAR_1, VK_BAR1_DAUTH_STORE_ADDR(i));
1077 vkwrite32(vk, 0, BAR_1, VK_BAR1_DAUTH_VALID_ADDR(i));
1078 }
1079 for (i = 0; i < VK_BAR1_SOTP_REVID_MAX; i++)
1080 vkwrite32(vk, 0, BAR_1, VK_BAR1_SOTP_REVID_ADDR(i));
1081
1082 memset(&vk->card_info, 0, sizeof(vk->card_info));
1083 memset(&vk->peerlog_info, 0, sizeof(vk->peerlog_info));
1084 memset(&vk->proc_mon_info, 0, sizeof(vk->proc_mon_info));
1085 memset(&vk->alert_cnts, 0, sizeof(vk->alert_cnts));
1086
1087 /*
1088 * When boot request fails, the CODE_PUSH_OFFSET stays persistent.
1089 * Allowing us to debug the failure. When we call reset,
1090 * we should clear CODE_PUSH_OFFSET so ROM does not execute
1091 * boot again (and fails again) and instead waits for a new
1092 * codepush. And, if previous boot has encountered error, need
1093 * to clear the entry values
1094 */
1095 boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS);
1096 if (boot_status & BOOT_ERR_MASK) {
1097 dev_info(&vk->pdev->dev,
1098 "Card in boot error 0x%x, clear CODEPUSH val\n",
1099 boot_status);
1100 value = 0;
1101 } else {
1102 value = vkread32(vk, BAR_0, BAR_CODEPUSH_SBL);
1103 value &= CODEPUSH_MASK;
1104 }
1105 vkwrite32(vk, value, BAR_0, BAR_CODEPUSH_SBL);
1106
1107 /* special reset handling */
1108 is_stdalone = boot_status & BOOT_STDALONE_RUNNING;
1109 is_boot2 = (boot_status & BOOT_STATE_MASK) == BOOT2_RUNNING;
1110 if (vk->peer_alert.flags & ERR_LOG_RAMDUMP) {
1111 /*
1112 * if card is in ramdump mode, it is hitting an error. Don't
1113 * reset the reboot reason as it will contain valid info that
1114 * is important - simply use special reset
1115 */
1116 vkwrite32(vk, VK_BAR0_RESET_RAMPDUMP, BAR_0, VK_BAR_FWSTS);
1117 return VK_BAR0_RESET_RAMPDUMP;
1118 } else if (is_stdalone && !is_boot2) {
1119 dev_info(&vk->pdev->dev, "Hard reset on Standalone mode");
1120 bcm_to_v_reset_doorbell(vk, VK_BAR0_RESET_DB_HARD);
1121 return VK_BAR0_RESET_DB_HARD;
1122 }
1123
1124 /* reset fw_status with proper reason, and press db */
1125 vkwrite32(vk, VK_FWSTS_RESET_MBOX_DB, BAR_0, VK_BAR_FWSTS);
1126 bcm_to_v_reset_doorbell(vk, VK_BAR0_RESET_DB_SOFT);
1127
1128 /* clear other necessary registers and alert records */
1129 for (i = 0; i < ARRAY_SIZE(bar0_reg_clr_list); i++)
1130 vkwrite32(vk, 0, BAR_0, bar0_reg_clr_list[i]);
1131 memset(&vk->host_alert, 0, sizeof(vk->host_alert));
1132 memset(&vk->peer_alert, 0, sizeof(vk->peer_alert));
1133 /* clear 4096 bits of bitmap */
1134 bitmap_clear(vk->bmap, 0, VK_MSG_ID_BITMAP_SIZE);
1135
1136 return 0;
1137 }
1138
bcm_vk_reset(struct bcm_vk * vk,struct vk_reset __user * arg)1139 static long bcm_vk_reset(struct bcm_vk *vk, struct vk_reset __user *arg)
1140 {
1141 struct device *dev = &vk->pdev->dev;
1142 struct vk_reset reset;
1143 int ret = 0;
1144 u32 ramdump_reset;
1145 int special_reset;
1146
1147 if (copy_from_user(&reset, arg, sizeof(struct vk_reset)))
1148 return -EFAULT;
1149
1150 /* check if any download is in-progress, if so return error */
1151 if (test_and_set_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload) != 0) {
1152 dev_err(dev, "Download operation pending - skip reset.\n");
1153 return -EPERM;
1154 }
1155
1156 ramdump_reset = vk->peer_alert.flags & ERR_LOG_RAMDUMP;
1157 dev_info(dev, "Issue Reset %s\n",
1158 ramdump_reset ? "in ramdump mode" : "");
1159
1160 /*
1161 * The following is the sequence of reset:
1162 * - send card level graceful shut down
1163 * - wait enough time for VK to handle its business, stopping DMA etc
1164 * - kill host apps
1165 * - Trigger interrupt with DB
1166 */
1167 bcm_vk_send_shutdown_msg(vk, VK_SHUTDOWN_GRACEFUL, 0, 0);
1168
1169 spin_lock(&vk->ctx_lock);
1170 if (!vk->reset_pid) {
1171 vk->reset_pid = task_pid_nr(current);
1172 } else {
1173 dev_err(dev, "Reset already launched by process pid %d\n",
1174 vk->reset_pid);
1175 ret = -EACCES;
1176 }
1177 spin_unlock(&vk->ctx_lock);
1178 if (ret)
1179 goto err_exit;
1180
1181 bcm_vk_blk_drv_access(vk);
1182 special_reset = bcm_vk_trigger_reset(vk);
1183
1184 /*
1185 * Wait enough time for card os to deinit
1186 * and populate the reset reason.
1187 */
1188 msleep(BCM_VK_DEINIT_TIME_MS);
1189
1190 if (special_reset) {
1191 /* if it is special ramdump reset, return the type to user */
1192 reset.arg2 = special_reset;
1193 if (copy_to_user(arg, &reset, sizeof(reset)))
1194 ret = -EFAULT;
1195 } else {
1196 ret = bcm_vk_reset_successful(vk);
1197 }
1198
1199 err_exit:
1200 clear_bit(BCM_VK_WQ_DWNLD_PEND, vk->wq_offload);
1201 return ret;
1202 }
1203
bcm_vk_mmap(struct file * file,struct vm_area_struct * vma)1204 static int bcm_vk_mmap(struct file *file, struct vm_area_struct *vma)
1205 {
1206 struct bcm_vk_ctx *ctx = file->private_data;
1207 struct bcm_vk *vk = container_of(ctx->miscdev, struct bcm_vk, miscdev);
1208 unsigned long pg_size;
1209
1210 /* only BAR2 is mmap possible, which is bar num 4 due to 64bit */
1211 #define VK_MMAPABLE_BAR 4
1212
1213 pg_size = ((pci_resource_len(vk->pdev, VK_MMAPABLE_BAR) - 1)
1214 >> PAGE_SHIFT) + 1;
1215 if (vma->vm_pgoff + vma_pages(vma) > pg_size)
1216 return -EINVAL;
1217
1218 vma->vm_pgoff += (pci_resource_start(vk->pdev, VK_MMAPABLE_BAR)
1219 >> PAGE_SHIFT);
1220 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
1221
1222 return io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff,
1223 vma->vm_end - vma->vm_start,
1224 vma->vm_page_prot);
1225 }
1226
bcm_vk_ioctl(struct file * file,unsigned int cmd,unsigned long arg)1227 static long bcm_vk_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1228 {
1229 long ret = -EINVAL;
1230 struct bcm_vk_ctx *ctx = file->private_data;
1231 struct bcm_vk *vk = container_of(ctx->miscdev, struct bcm_vk, miscdev);
1232 void __user *argp = (void __user *)arg;
1233
1234 dev_dbg(&vk->pdev->dev,
1235 "ioctl, cmd=0x%02x, arg=0x%02lx\n",
1236 cmd, arg);
1237
1238 mutex_lock(&vk->mutex);
1239
1240 switch (cmd) {
1241 case VK_IOCTL_LOAD_IMAGE:
1242 ret = bcm_vk_load_image(vk, argp);
1243 break;
1244
1245 case VK_IOCTL_RESET:
1246 ret = bcm_vk_reset(vk, argp);
1247 break;
1248
1249 default:
1250 break;
1251 }
1252
1253 mutex_unlock(&vk->mutex);
1254
1255 return ret;
1256 }
1257
1258 static const struct file_operations bcm_vk_fops = {
1259 .owner = THIS_MODULE,
1260 .open = bcm_vk_open,
1261 .read = bcm_vk_read,
1262 .write = bcm_vk_write,
1263 .poll = bcm_vk_poll,
1264 .release = bcm_vk_release,
1265 .mmap = bcm_vk_mmap,
1266 .unlocked_ioctl = bcm_vk_ioctl,
1267 };
1268
bcm_vk_on_panic(struct notifier_block * nb,unsigned long e,void * p)1269 static int bcm_vk_on_panic(struct notifier_block *nb,
1270 unsigned long e, void *p)
1271 {
1272 struct bcm_vk *vk = container_of(nb, struct bcm_vk, panic_nb);
1273
1274 bcm_to_v_reset_doorbell(vk, VK_BAR0_RESET_DB_HARD);
1275
1276 return 0;
1277 }
1278
bcm_vk_probe(struct pci_dev * pdev,const struct pci_device_id * ent)1279 static int bcm_vk_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
1280 {
1281 int err;
1282 int i;
1283 int id;
1284 int irq;
1285 char name[20];
1286 struct bcm_vk *vk;
1287 struct device *dev = &pdev->dev;
1288 struct miscdevice *misc_device;
1289 u32 boot_status;
1290
1291 /* allocate vk structure which is tied to kref for freeing */
1292 vk = kzalloc(sizeof(*vk), GFP_KERNEL);
1293 if (!vk)
1294 return -ENOMEM;
1295
1296 kref_init(&vk->kref);
1297 if (nr_ib_sgl_blk > BCM_VK_IB_SGL_BLK_MAX) {
1298 dev_warn(dev, "Inband SGL blk %d limited to max %d\n",
1299 nr_ib_sgl_blk, BCM_VK_IB_SGL_BLK_MAX);
1300 nr_ib_sgl_blk = BCM_VK_IB_SGL_BLK_MAX;
1301 }
1302 vk->ib_sgl_size = nr_ib_sgl_blk * VK_MSGQ_BLK_SIZE;
1303 mutex_init(&vk->mutex);
1304
1305 err = pci_enable_device(pdev);
1306 if (err) {
1307 dev_err(dev, "Cannot enable PCI device\n");
1308 goto err_free_exit;
1309 }
1310 vk->pdev = pci_dev_get(pdev);
1311
1312 err = pci_request_regions(pdev, DRV_MODULE_NAME);
1313 if (err) {
1314 dev_err(dev, "Cannot obtain PCI resources\n");
1315 goto err_disable_pdev;
1316 }
1317
1318 /* make sure DMA is good */
1319 err = dma_set_mask_and_coherent(&pdev->dev,
1320 DMA_BIT_MASK(BCM_VK_DMA_BITS));
1321 if (err) {
1322 dev_err(dev, "failed to set DMA mask\n");
1323 goto err_disable_pdev;
1324 }
1325
1326 /* The tdma is a scratch area for some DMA testings. */
1327 if (nr_scratch_pages) {
1328 vk->tdma_vaddr = dma_alloc_coherent
1329 (dev,
1330 nr_scratch_pages * PAGE_SIZE,
1331 &vk->tdma_addr, GFP_KERNEL);
1332 if (!vk->tdma_vaddr) {
1333 err = -ENOMEM;
1334 goto err_disable_pdev;
1335 }
1336 }
1337
1338 pci_set_master(pdev);
1339 pci_set_drvdata(pdev, vk);
1340
1341 irq = pci_alloc_irq_vectors(pdev,
1342 VK_MSIX_IRQ_MIN_REQ,
1343 VK_MSIX_IRQ_MAX,
1344 PCI_IRQ_MSI | PCI_IRQ_MSIX);
1345
1346 if (irq < VK_MSIX_IRQ_MIN_REQ) {
1347 dev_err(dev, "failed to get min %d MSIX interrupts, irq(%d)\n",
1348 VK_MSIX_IRQ_MIN_REQ, irq);
1349 err = (irq >= 0) ? -EINVAL : irq;
1350 goto err_disable_pdev;
1351 }
1352
1353 if (irq != VK_MSIX_IRQ_MAX)
1354 dev_warn(dev, "Number of IRQs %d allocated - requested(%d).\n",
1355 irq, VK_MSIX_IRQ_MAX);
1356
1357 for (i = 0; i < MAX_BAR; i++) {
1358 /* multiple by 2 for 64 bit BAR mapping */
1359 vk->bar[i] = pci_ioremap_bar(pdev, i * 2);
1360 if (!vk->bar[i]) {
1361 dev_err(dev, "failed to remap BAR%d\n", i);
1362 err = -ENOMEM;
1363 goto err_iounmap;
1364 }
1365 }
1366
1367 for (vk->num_irqs = 0;
1368 vk->num_irqs < VK_MSIX_MSGQ_MAX;
1369 vk->num_irqs++) {
1370 err = devm_request_irq(dev, pci_irq_vector(pdev, vk->num_irqs),
1371 bcm_vk_msgq_irqhandler,
1372 IRQF_SHARED, DRV_MODULE_NAME, vk);
1373 if (err) {
1374 dev_err(dev, "failed to request msgq IRQ %d for MSIX %d\n",
1375 pdev->irq + vk->num_irqs, vk->num_irqs + 1);
1376 goto err_irq;
1377 }
1378 }
1379 /* one irq for notification from VK */
1380 err = devm_request_irq(dev, pci_irq_vector(pdev, vk->num_irqs),
1381 bcm_vk_notf_irqhandler,
1382 IRQF_SHARED, DRV_MODULE_NAME, vk);
1383 if (err) {
1384 dev_err(dev, "failed to request notf IRQ %d for MSIX %d\n",
1385 pdev->irq + vk->num_irqs, vk->num_irqs + 1);
1386 goto err_irq;
1387 }
1388 vk->num_irqs++;
1389
1390 for (i = 0;
1391 (i < VK_MSIX_TTY_MAX) && (vk->num_irqs < irq);
1392 i++, vk->num_irqs++) {
1393 err = devm_request_irq(dev, pci_irq_vector(pdev, vk->num_irqs),
1394 bcm_vk_tty_irqhandler,
1395 IRQF_SHARED, DRV_MODULE_NAME, vk);
1396 if (err) {
1397 dev_err(dev, "failed request tty IRQ %d for MSIX %d\n",
1398 pdev->irq + vk->num_irqs, vk->num_irqs + 1);
1399 goto err_irq;
1400 }
1401 bcm_vk_tty_set_irq_enabled(vk, i);
1402 }
1403
1404 id = ida_alloc(&bcm_vk_ida, GFP_KERNEL);
1405 if (id < 0) {
1406 err = id;
1407 dev_err(dev, "unable to get id\n");
1408 goto err_irq;
1409 }
1410
1411 vk->devid = id;
1412 snprintf(name, sizeof(name), DRV_MODULE_NAME ".%d", id);
1413 misc_device = &vk->miscdev;
1414 misc_device->minor = MISC_DYNAMIC_MINOR;
1415 misc_device->name = kstrdup(name, GFP_KERNEL);
1416 if (!misc_device->name) {
1417 err = -ENOMEM;
1418 goto err_ida_remove;
1419 }
1420 misc_device->fops = &bcm_vk_fops,
1421
1422 err = misc_register(misc_device);
1423 if (err) {
1424 dev_err(dev, "failed to register device\n");
1425 goto err_kfree_name;
1426 }
1427
1428 INIT_WORK(&vk->wq_work, bcm_vk_wq_handler);
1429
1430 /* create dedicated workqueue */
1431 vk->wq_thread = create_singlethread_workqueue(name);
1432 if (!vk->wq_thread) {
1433 dev_err(dev, "Fail to create workqueue thread\n");
1434 err = -ENOMEM;
1435 goto err_misc_deregister;
1436 }
1437
1438 err = bcm_vk_msg_init(vk);
1439 if (err) {
1440 dev_err(dev, "failed to init msg queue info\n");
1441 goto err_destroy_workqueue;
1442 }
1443
1444 /* sync other info */
1445 bcm_vk_sync_card_info(vk);
1446
1447 /* register for panic notifier */
1448 vk->panic_nb.notifier_call = bcm_vk_on_panic;
1449 err = atomic_notifier_chain_register(&panic_notifier_list,
1450 &vk->panic_nb);
1451 if (err) {
1452 dev_err(dev, "Fail to register panic notifier\n");
1453 goto err_destroy_workqueue;
1454 }
1455
1456 snprintf(name, sizeof(name), KBUILD_MODNAME ".%d_ttyVK", id);
1457 err = bcm_vk_tty_init(vk, name);
1458 if (err)
1459 goto err_unregister_panic_notifier;
1460
1461 /*
1462 * lets trigger an auto download. We don't want to do it serially here
1463 * because at probing time, it is not supposed to block for a long time.
1464 */
1465 boot_status = vkread32(vk, BAR_0, BAR_BOOT_STATUS);
1466 if (auto_load) {
1467 if ((boot_status & BOOT_STATE_MASK) == BROM_RUNNING) {
1468 err = bcm_vk_trigger_autoload(vk);
1469 if (err)
1470 goto err_bcm_vk_tty_exit;
1471 } else {
1472 dev_err(dev,
1473 "Auto-load skipped - BROM not in proper state (0x%x)\n",
1474 boot_status);
1475 }
1476 }
1477
1478 /* enable hb */
1479 bcm_vk_hb_init(vk);
1480
1481 dev_dbg(dev, "BCM-VK:%u created\n", id);
1482
1483 return 0;
1484
1485 err_bcm_vk_tty_exit:
1486 bcm_vk_tty_exit(vk);
1487
1488 err_unregister_panic_notifier:
1489 atomic_notifier_chain_unregister(&panic_notifier_list,
1490 &vk->panic_nb);
1491
1492 err_destroy_workqueue:
1493 destroy_workqueue(vk->wq_thread);
1494
1495 err_misc_deregister:
1496 misc_deregister(misc_device);
1497
1498 err_kfree_name:
1499 kfree(misc_device->name);
1500 misc_device->name = NULL;
1501
1502 err_ida_remove:
1503 ida_free(&bcm_vk_ida, id);
1504
1505 err_irq:
1506 for (i = 0; i < vk->num_irqs; i++)
1507 devm_free_irq(dev, pci_irq_vector(pdev, i), vk);
1508
1509 pci_disable_msix(pdev);
1510 pci_disable_msi(pdev);
1511
1512 err_iounmap:
1513 for (i = 0; i < MAX_BAR; i++) {
1514 if (vk->bar[i])
1515 pci_iounmap(pdev, vk->bar[i]);
1516 }
1517 pci_release_regions(pdev);
1518
1519 err_disable_pdev:
1520 if (vk->tdma_vaddr)
1521 dma_free_coherent(&pdev->dev, nr_scratch_pages * PAGE_SIZE,
1522 vk->tdma_vaddr, vk->tdma_addr);
1523
1524 pci_free_irq_vectors(pdev);
1525 pci_disable_device(pdev);
1526 pci_dev_put(pdev);
1527
1528 err_free_exit:
1529 kfree(vk);
1530
1531 return err;
1532 }
1533
bcm_vk_release_data(struct kref * kref)1534 void bcm_vk_release_data(struct kref *kref)
1535 {
1536 struct bcm_vk *vk = container_of(kref, struct bcm_vk, kref);
1537 struct pci_dev *pdev = vk->pdev;
1538
1539 dev_dbg(&pdev->dev, "BCM-VK:%d release data 0x%p\n", vk->devid, vk);
1540 pci_dev_put(pdev);
1541 kfree(vk);
1542 }
1543
bcm_vk_remove(struct pci_dev * pdev)1544 static void bcm_vk_remove(struct pci_dev *pdev)
1545 {
1546 int i;
1547 struct bcm_vk *vk = pci_get_drvdata(pdev);
1548 struct miscdevice *misc_device = &vk->miscdev;
1549
1550 bcm_vk_hb_deinit(vk);
1551
1552 /*
1553 * Trigger a reset to card and wait enough time for UCODE to rerun,
1554 * which re-initialize the card into its default state.
1555 * This ensures when driver is re-enumerated it will start from
1556 * a completely clean state.
1557 */
1558 bcm_vk_trigger_reset(vk);
1559 usleep_range(BCM_VK_UCODE_BOOT_US, BCM_VK_UCODE_BOOT_MAX_US);
1560
1561 /* unregister panic notifier */
1562 atomic_notifier_chain_unregister(&panic_notifier_list,
1563 &vk->panic_nb);
1564
1565 bcm_vk_msg_remove(vk);
1566 bcm_vk_tty_exit(vk);
1567
1568 if (vk->tdma_vaddr)
1569 dma_free_coherent(&pdev->dev, nr_scratch_pages * PAGE_SIZE,
1570 vk->tdma_vaddr, vk->tdma_addr);
1571
1572 /* remove if name is set which means misc dev registered */
1573 if (misc_device->name) {
1574 misc_deregister(misc_device);
1575 kfree(misc_device->name);
1576 ida_free(&bcm_vk_ida, vk->devid);
1577 }
1578 for (i = 0; i < vk->num_irqs; i++)
1579 devm_free_irq(&pdev->dev, pci_irq_vector(pdev, i), vk);
1580
1581 pci_disable_msix(pdev);
1582 pci_disable_msi(pdev);
1583
1584 cancel_work_sync(&vk->wq_work);
1585 destroy_workqueue(vk->wq_thread);
1586 bcm_vk_tty_wq_exit(vk);
1587
1588 for (i = 0; i < MAX_BAR; i++) {
1589 if (vk->bar[i])
1590 pci_iounmap(pdev, vk->bar[i]);
1591 }
1592
1593 dev_dbg(&pdev->dev, "BCM-VK:%d released\n", vk->devid);
1594
1595 pci_release_regions(pdev);
1596 pci_free_irq_vectors(pdev);
1597 pci_disable_device(pdev);
1598
1599 kref_put(&vk->kref, bcm_vk_release_data);
1600 }
1601
bcm_vk_shutdown(struct pci_dev * pdev)1602 static void bcm_vk_shutdown(struct pci_dev *pdev)
1603 {
1604 struct bcm_vk *vk = pci_get_drvdata(pdev);
1605 u32 reg, boot_stat;
1606
1607 reg = vkread32(vk, BAR_0, BAR_BOOT_STATUS);
1608 boot_stat = reg & BOOT_STATE_MASK;
1609
1610 if (boot_stat == BOOT1_RUNNING) {
1611 /* simply trigger a reset interrupt to park it */
1612 bcm_vk_trigger_reset(vk);
1613 } else if (boot_stat == BROM_NOT_RUN) {
1614 int err;
1615 u16 lnksta;
1616
1617 /*
1618 * The boot status only reflects boot condition since last reset
1619 * As ucode will run only once to configure pcie, if multiple
1620 * resets happen, we lost track if ucode has run or not.
1621 * Here, read the current link speed and use that to
1622 * sync up the bootstatus properly so that on reboot-back-up,
1623 * it has the proper state to start with autoload
1624 */
1625 err = pcie_capability_read_word(pdev, PCI_EXP_LNKSTA, &lnksta);
1626 if (!err &&
1627 (lnksta & PCI_EXP_LNKSTA_CLS) != PCI_EXP_LNKSTA_CLS_2_5GB) {
1628 reg |= BROM_STATUS_COMPLETE;
1629 vkwrite32(vk, reg, BAR_0, BAR_BOOT_STATUS);
1630 }
1631 }
1632 }
1633
1634 static const struct pci_device_id bcm_vk_ids[] = {
1635 { PCI_DEVICE(PCI_VENDOR_ID_BROADCOM, PCI_DEVICE_ID_VALKYRIE), },
1636 { }
1637 };
1638 MODULE_DEVICE_TABLE(pci, bcm_vk_ids);
1639
1640 static struct pci_driver pci_driver = {
1641 .name = DRV_MODULE_NAME,
1642 .id_table = bcm_vk_ids,
1643 .probe = bcm_vk_probe,
1644 .remove = bcm_vk_remove,
1645 .shutdown = bcm_vk_shutdown,
1646 };
1647 module_pci_driver(pci_driver);
1648
1649 MODULE_DESCRIPTION("Broadcom VK Host Driver");
1650 MODULE_AUTHOR("Scott Branden <[email protected]>");
1651 MODULE_LICENSE("GPL v2");
1652 MODULE_VERSION("1.0");
1653