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c8806b6c NM |
1 | /* |
2 | * Copyright 2014 Cisco Systems, Inc. All rights reserved. | |
3 | * | |
4 | * This program is free software; you may redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; version 2 of the License. | |
7 | * | |
8 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, | |
9 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF | |
10 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND | |
11 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS | |
12 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | |
13 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
14 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
15 | * SOFTWARE. | |
16 | */ | |
17 | ||
18 | #include <linux/kernel.h> | |
19 | #include <linux/errno.h> | |
20 | #include <linux/types.h> | |
21 | #include <linux/pci.h> | |
22 | #include <linux/delay.h> | |
23 | #include <linux/if_ether.h> | |
24 | #include <linux/slab.h> | |
25 | #include "vnic_resource.h" | |
26 | #include "vnic_devcmd.h" | |
27 | #include "vnic_dev.h" | |
28 | #include "vnic_stats.h" | |
29 | #include "vnic_wq.h" | |
30 | ||
31 | #define VNIC_DVCMD_TMO 10000 /* Devcmd Timeout value */ | |
32 | #define VNIC_NOTIFY_INTR_MASK 0x0000ffff00000000ULL | |
33 | ||
34 | struct devcmd2_controller { | |
35 | struct vnic_wq_ctrl __iomem *wq_ctrl; | |
36 | struct vnic_dev_ring results_ring; | |
37 | struct vnic_wq wq; | |
38 | struct vnic_devcmd2 *cmd_ring; | |
39 | struct devcmd2_result *result; | |
40 | u16 next_result; | |
41 | u16 result_size; | |
42 | int color; | |
43 | }; | |
44 | ||
45 | struct vnic_res { | |
46 | void __iomem *vaddr; | |
47 | unsigned int count; | |
48 | }; | |
49 | ||
50 | struct vnic_dev { | |
51 | void *priv; | |
52 | struct pci_dev *pdev; | |
53 | struct vnic_res res[RES_TYPE_MAX]; | |
54 | enum vnic_dev_intr_mode intr_mode; | |
55 | struct vnic_devcmd __iomem *devcmd; | |
56 | struct vnic_devcmd_notify *notify; | |
57 | struct vnic_devcmd_notify notify_copy; | |
58 | dma_addr_t notify_pa; | |
59 | u32 *linkstatus; | |
60 | dma_addr_t linkstatus_pa; | |
61 | struct vnic_stats *stats; | |
62 | dma_addr_t stats_pa; | |
63 | struct vnic_devcmd_fw_info *fw_info; | |
64 | dma_addr_t fw_info_pa; | |
65 | u64 args[VNIC_DEVCMD_NARGS]; | |
66 | struct devcmd2_controller *devcmd2; | |
67 | ||
68 | int (*devcmd_rtn)(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, | |
69 | int wait); | |
70 | }; | |
71 | ||
72 | #define VNIC_MAX_RES_HDR_SIZE \ | |
73 | (sizeof(struct vnic_resource_header) + \ | |
74 | sizeof(struct vnic_resource) * RES_TYPE_MAX) | |
75 | #define VNIC_RES_STRIDE 128 | |
76 | ||
77 | void *svnic_dev_priv(struct vnic_dev *vdev) | |
78 | { | |
79 | return vdev->priv; | |
80 | } | |
81 | ||
82 | static int vnic_dev_discover_res(struct vnic_dev *vdev, | |
83 | struct vnic_dev_bar *bar, unsigned int num_bars) | |
84 | { | |
85 | struct vnic_resource_header __iomem *rh; | |
86 | struct vnic_resource __iomem *r; | |
87 | u8 type; | |
88 | ||
89 | if (num_bars == 0) | |
90 | return -EINVAL; | |
91 | ||
92 | if (bar->len < VNIC_MAX_RES_HDR_SIZE) { | |
93 | pr_err("vNIC BAR0 res hdr length error\n"); | |
94 | ||
95 | return -EINVAL; | |
96 | } | |
97 | ||
98 | rh = bar->vaddr; | |
99 | if (!rh) { | |
100 | pr_err("vNIC BAR0 res hdr not mem-mapped\n"); | |
101 | ||
102 | return -EINVAL; | |
103 | } | |
104 | ||
105 | if (ioread32(&rh->magic) != VNIC_RES_MAGIC || | |
106 | ioread32(&rh->version) != VNIC_RES_VERSION) { | |
107 | pr_err("vNIC BAR0 res magic/version error exp (%lx/%lx) curr (%x/%x)\n", | |
108 | VNIC_RES_MAGIC, VNIC_RES_VERSION, | |
109 | ioread32(&rh->magic), ioread32(&rh->version)); | |
110 | ||
111 | return -EINVAL; | |
112 | } | |
113 | ||
114 | r = (struct vnic_resource __iomem *)(rh + 1); | |
115 | ||
116 | while ((type = ioread8(&r->type)) != RES_TYPE_EOL) { | |
117 | ||
118 | u8 bar_num = ioread8(&r->bar); | |
119 | u32 bar_offset = ioread32(&r->bar_offset); | |
120 | u32 count = ioread32(&r->count); | |
121 | u32 len; | |
122 | ||
123 | r++; | |
124 | ||
125 | if (bar_num >= num_bars) | |
126 | continue; | |
127 | ||
128 | if (!bar[bar_num].len || !bar[bar_num].vaddr) | |
129 | continue; | |
130 | ||
131 | switch (type) { | |
132 | case RES_TYPE_WQ: | |
133 | case RES_TYPE_RQ: | |
134 | case RES_TYPE_CQ: | |
135 | case RES_TYPE_INTR_CTRL: | |
136 | /* each count is stride bytes long */ | |
137 | len = count * VNIC_RES_STRIDE; | |
138 | if (len + bar_offset > bar->len) { | |
139 | pr_err("vNIC BAR0 resource %d out-of-bounds, offset 0x%x + size 0x%x > bar len 0x%lx\n", | |
140 | type, bar_offset, | |
141 | len, | |
142 | bar->len); | |
143 | ||
144 | return -EINVAL; | |
145 | } | |
146 | break; | |
147 | ||
148 | case RES_TYPE_INTR_PBA_LEGACY: | |
149 | case RES_TYPE_DEVCMD: | |
150 | case RES_TYPE_DEVCMD2: | |
151 | len = count; | |
152 | break; | |
153 | ||
154 | default: | |
155 | continue; | |
156 | } | |
157 | ||
158 | vdev->res[type].count = count; | |
159 | vdev->res[type].vaddr = (char __iomem *)bar->vaddr + bar_offset; | |
160 | } | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | unsigned int svnic_dev_get_res_count(struct vnic_dev *vdev, | |
166 | enum vnic_res_type type) | |
167 | { | |
168 | return vdev->res[type].count; | |
169 | } | |
170 | ||
171 | void __iomem *svnic_dev_get_res(struct vnic_dev *vdev, enum vnic_res_type type, | |
172 | unsigned int index) | |
173 | { | |
174 | if (!vdev->res[type].vaddr) | |
175 | return NULL; | |
176 | ||
177 | switch (type) { | |
178 | case RES_TYPE_WQ: | |
179 | case RES_TYPE_RQ: | |
180 | case RES_TYPE_CQ: | |
181 | case RES_TYPE_INTR_CTRL: | |
182 | return (char __iomem *)vdev->res[type].vaddr + | |
183 | index * VNIC_RES_STRIDE; | |
184 | ||
185 | default: | |
186 | return (char __iomem *)vdev->res[type].vaddr; | |
187 | } | |
188 | } | |
189 | ||
190 | unsigned int svnic_dev_desc_ring_size(struct vnic_dev_ring *ring, | |
191 | unsigned int desc_count, | |
192 | unsigned int desc_size) | |
193 | { | |
194 | /* The base address of the desc rings must be 512 byte aligned. | |
195 | * Descriptor count is aligned to groups of 32 descriptors. A | |
196 | * count of 0 means the maximum 4096 descriptors. Descriptor | |
197 | * size is aligned to 16 bytes. | |
198 | */ | |
199 | ||
200 | unsigned int count_align = 32; | |
201 | unsigned int desc_align = 16; | |
202 | ||
203 | ring->base_align = 512; | |
204 | ||
205 | if (desc_count == 0) | |
206 | desc_count = 4096; | |
207 | ||
208 | ring->desc_count = ALIGN(desc_count, count_align); | |
209 | ||
210 | ring->desc_size = ALIGN(desc_size, desc_align); | |
211 | ||
212 | ring->size = ring->desc_count * ring->desc_size; | |
213 | ring->size_unaligned = ring->size + ring->base_align; | |
214 | ||
215 | return ring->size_unaligned; | |
216 | } | |
217 | ||
218 | void svnic_dev_clear_desc_ring(struct vnic_dev_ring *ring) | |
219 | { | |
220 | memset(ring->descs, 0, ring->size); | |
221 | } | |
222 | ||
223 | int svnic_dev_alloc_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring, | |
224 | unsigned int desc_count, unsigned int desc_size) | |
225 | { | |
226 | svnic_dev_desc_ring_size(ring, desc_count, desc_size); | |
227 | ||
228 | ring->descs_unaligned = pci_alloc_consistent(vdev->pdev, | |
229 | ring->size_unaligned, | |
230 | &ring->base_addr_unaligned); | |
231 | ||
232 | if (!ring->descs_unaligned) { | |
233 | pr_err("Failed to allocate ring (size=%d), aborting\n", | |
234 | (int)ring->size); | |
235 | ||
236 | return -ENOMEM; | |
237 | } | |
238 | ||
239 | ring->base_addr = ALIGN(ring->base_addr_unaligned, | |
240 | ring->base_align); | |
241 | ring->descs = (u8 *)ring->descs_unaligned + | |
242 | (ring->base_addr - ring->base_addr_unaligned); | |
243 | ||
244 | svnic_dev_clear_desc_ring(ring); | |
245 | ||
246 | ring->desc_avail = ring->desc_count - 1; | |
247 | ||
248 | return 0; | |
249 | } | |
250 | ||
251 | void svnic_dev_free_desc_ring(struct vnic_dev *vdev, struct vnic_dev_ring *ring) | |
252 | { | |
253 | if (ring->descs) { | |
254 | pci_free_consistent(vdev->pdev, | |
255 | ring->size_unaligned, | |
256 | ring->descs_unaligned, | |
257 | ring->base_addr_unaligned); | |
258 | ring->descs = NULL; | |
259 | } | |
260 | } | |
261 | ||
262 | static int _svnic_dev_cmd2(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, | |
263 | int wait) | |
264 | { | |
265 | struct devcmd2_controller *dc2c = vdev->devcmd2; | |
266 | struct devcmd2_result *result = dc2c->result + dc2c->next_result; | |
267 | unsigned int i; | |
268 | int delay; | |
269 | int err; | |
270 | u32 posted; | |
271 | u32 new_posted; | |
272 | ||
273 | posted = ioread32(&dc2c->wq_ctrl->posted_index); | |
274 | ||
275 | if (posted == 0xFFFFFFFF) { /* check for hardware gone */ | |
276 | /* Hardware surprise removal: return error */ | |
277 | return -ENODEV; | |
278 | } | |
279 | ||
280 | new_posted = (posted + 1) % DEVCMD2_RING_SIZE; | |
281 | dc2c->cmd_ring[posted].cmd = cmd; | |
282 | dc2c->cmd_ring[posted].flags = 0; | |
283 | ||
284 | if ((_CMD_FLAGS(cmd) & _CMD_FLAGS_NOWAIT)) | |
285 | dc2c->cmd_ring[posted].flags |= DEVCMD2_FNORESULT; | |
286 | ||
287 | if (_CMD_DIR(cmd) & _CMD_DIR_WRITE) { | |
288 | for (i = 0; i < VNIC_DEVCMD_NARGS; i++) | |
289 | dc2c->cmd_ring[posted].args[i] = vdev->args[i]; | |
290 | } | |
291 | /* Adding write memory barrier prevents compiler and/or CPU | |
292 | * reordering, thus avoiding descriptor posting before | |
293 | * descriptor is initialized. Otherwise, hardware can read | |
294 | * stale descriptor fields. | |
295 | */ | |
296 | wmb(); | |
297 | iowrite32(new_posted, &dc2c->wq_ctrl->posted_index); | |
298 | ||
299 | if (dc2c->cmd_ring[posted].flags & DEVCMD2_FNORESULT) | |
300 | return 0; | |
301 | ||
302 | for (delay = 0; delay < wait; delay++) { | |
303 | udelay(100); | |
304 | if (result->color == dc2c->color) { | |
305 | dc2c->next_result++; | |
306 | if (dc2c->next_result == dc2c->result_size) { | |
307 | dc2c->next_result = 0; | |
308 | dc2c->color = dc2c->color ? 0 : 1; | |
309 | } | |
310 | if (result->error) { | |
311 | err = (int) result->error; | |
312 | if (err != ERR_ECMDUNKNOWN || | |
313 | cmd != CMD_CAPABILITY) | |
314 | pr_err("Error %d devcmd %d\n", | |
315 | err, _CMD_N(cmd)); | |
316 | ||
317 | return err; | |
318 | } | |
319 | if (_CMD_DIR(cmd) & _CMD_DIR_READ) { | |
320 | /* | |
321 | * Adding the rmb() prevents the compiler | |
322 | * and/or CPU from reordering the reads which | |
323 | * would potentially result in reading stale | |
324 | * values. | |
325 | */ | |
326 | rmb(); | |
327 | for (i = 0; i < VNIC_DEVCMD_NARGS; i++) | |
328 | vdev->args[i] = result->results[i]; | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | } | |
334 | ||
335 | pr_err("Timed out devcmd %d\n", _CMD_N(cmd)); | |
336 | ||
337 | return -ETIMEDOUT; | |
338 | } | |
339 | ||
340 | static int svnic_dev_init_devcmd2(struct vnic_dev *vdev) | |
341 | { | |
342 | struct devcmd2_controller *dc2c = NULL; | |
343 | unsigned int fetch_idx; | |
344 | int ret; | |
345 | void __iomem *p; | |
346 | ||
347 | if (vdev->devcmd2) | |
348 | return 0; | |
349 | ||
350 | p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); | |
351 | if (!p) | |
352 | return -ENODEV; | |
353 | ||
354 | dc2c = kzalloc(sizeof(*dc2c), GFP_ATOMIC); | |
355 | if (!dc2c) | |
356 | return -ENOMEM; | |
357 | ||
358 | vdev->devcmd2 = dc2c; | |
359 | ||
360 | dc2c->color = 1; | |
361 | dc2c->result_size = DEVCMD2_RING_SIZE; | |
362 | ||
363 | ret = vnic_wq_devcmd2_alloc(vdev, | |
364 | &dc2c->wq, | |
365 | DEVCMD2_RING_SIZE, | |
366 | DEVCMD2_DESC_SIZE); | |
367 | if (ret) | |
368 | goto err_free_devcmd2; | |
369 | ||
370 | fetch_idx = ioread32(&dc2c->wq.ctrl->fetch_index); | |
371 | if (fetch_idx == 0xFFFFFFFF) { /* check for hardware gone */ | |
372 | /* Hardware surprise removal: reset fetch_index */ | |
373 | fetch_idx = 0; | |
374 | } | |
375 | ||
376 | /* | |
377 | * Don't change fetch_index ever and | |
378 | * set posted_index same as fetch_index | |
379 | * when setting up the WQ for devcmd2. | |
380 | */ | |
381 | vnic_wq_init_start(&dc2c->wq, 0, fetch_idx, fetch_idx, 0, 0); | |
382 | svnic_wq_enable(&dc2c->wq); | |
383 | ret = svnic_dev_alloc_desc_ring(vdev, | |
384 | &dc2c->results_ring, | |
385 | DEVCMD2_RING_SIZE, | |
386 | DEVCMD2_DESC_SIZE); | |
387 | if (ret) | |
388 | goto err_free_wq; | |
389 | ||
390 | dc2c->result = (struct devcmd2_result *) dc2c->results_ring.descs; | |
391 | dc2c->cmd_ring = (struct vnic_devcmd2 *) dc2c->wq.ring.descs; | |
392 | dc2c->wq_ctrl = dc2c->wq.ctrl; | |
393 | vdev->args[0] = (u64) dc2c->results_ring.base_addr | VNIC_PADDR_TARGET; | |
394 | vdev->args[1] = DEVCMD2_RING_SIZE; | |
395 | ||
396 | ret = _svnic_dev_cmd2(vdev, CMD_INITIALIZE_DEVCMD2, VNIC_DVCMD_TMO); | |
397 | if (ret < 0) | |
398 | goto err_free_desc_ring; | |
399 | ||
400 | vdev->devcmd_rtn = &_svnic_dev_cmd2; | |
401 | pr_info("DEVCMD2 Initialized.\n"); | |
402 | ||
403 | return ret; | |
404 | ||
405 | err_free_desc_ring: | |
406 | svnic_dev_free_desc_ring(vdev, &dc2c->results_ring); | |
407 | ||
408 | err_free_wq: | |
409 | svnic_wq_disable(&dc2c->wq); | |
410 | svnic_wq_free(&dc2c->wq); | |
411 | ||
412 | err_free_devcmd2: | |
413 | kfree(dc2c); | |
414 | vdev->devcmd2 = NULL; | |
415 | ||
416 | return ret; | |
417 | } /* end of svnic_dev_init_devcmd2 */ | |
418 | ||
419 | static void vnic_dev_deinit_devcmd2(struct vnic_dev *vdev) | |
420 | { | |
421 | struct devcmd2_controller *dc2c = vdev->devcmd2; | |
422 | ||
423 | vdev->devcmd2 = NULL; | |
424 | vdev->devcmd_rtn = NULL; | |
425 | ||
426 | svnic_dev_free_desc_ring(vdev, &dc2c->results_ring); | |
427 | svnic_wq_disable(&dc2c->wq); | |
428 | svnic_wq_free(&dc2c->wq); | |
429 | kfree(dc2c); | |
430 | } | |
431 | ||
432 | int svnic_dev_cmd(struct vnic_dev *vdev, enum vnic_devcmd_cmd cmd, | |
433 | u64 *a0, u64 *a1, int wait) | |
434 | { | |
435 | int err; | |
436 | ||
437 | memset(vdev->args, 0, sizeof(vdev->args)); | |
438 | vdev->args[0] = *a0; | |
439 | vdev->args[1] = *a1; | |
440 | ||
441 | err = (*vdev->devcmd_rtn)(vdev, cmd, wait); | |
442 | ||
443 | *a0 = vdev->args[0]; | |
444 | *a1 = vdev->args[1]; | |
445 | ||
446 | return err; | |
447 | } | |
448 | ||
449 | int svnic_dev_fw_info(struct vnic_dev *vdev, | |
450 | struct vnic_devcmd_fw_info **fw_info) | |
451 | { | |
452 | u64 a0, a1 = 0; | |
453 | int wait = VNIC_DVCMD_TMO; | |
454 | int err = 0; | |
455 | ||
456 | if (!vdev->fw_info) { | |
457 | vdev->fw_info = pci_alloc_consistent(vdev->pdev, | |
458 | sizeof(struct vnic_devcmd_fw_info), | |
459 | &vdev->fw_info_pa); | |
460 | if (!vdev->fw_info) | |
461 | return -ENOMEM; | |
462 | ||
463 | a0 = vdev->fw_info_pa; | |
464 | ||
465 | /* only get fw_info once and cache it */ | |
466 | err = svnic_dev_cmd(vdev, CMD_MCPU_FW_INFO, &a0, &a1, wait); | |
467 | } | |
468 | ||
469 | *fw_info = vdev->fw_info; | |
470 | ||
471 | return err; | |
472 | } | |
473 | ||
474 | int svnic_dev_spec(struct vnic_dev *vdev, unsigned int offset, | |
475 | unsigned int size, void *value) | |
476 | { | |
477 | u64 a0, a1; | |
478 | int wait = VNIC_DVCMD_TMO; | |
479 | int err; | |
480 | ||
481 | a0 = offset; | |
482 | a1 = size; | |
483 | ||
484 | err = svnic_dev_cmd(vdev, CMD_DEV_SPEC, &a0, &a1, wait); | |
485 | ||
486 | switch (size) { | |
487 | case 1: | |
488 | *(u8 *)value = (u8)a0; | |
489 | break; | |
490 | case 2: | |
491 | *(u16 *)value = (u16)a0; | |
492 | break; | |
493 | case 4: | |
494 | *(u32 *)value = (u32)a0; | |
495 | break; | |
496 | case 8: | |
497 | *(u64 *)value = a0; | |
498 | break; | |
499 | default: | |
500 | BUG(); | |
501 | break; | |
502 | } | |
503 | ||
504 | return err; | |
505 | } | |
506 | ||
507 | int svnic_dev_stats_clear(struct vnic_dev *vdev) | |
508 | { | |
509 | u64 a0 = 0, a1 = 0; | |
510 | int wait = VNIC_DVCMD_TMO; | |
511 | ||
512 | return svnic_dev_cmd(vdev, CMD_STATS_CLEAR, &a0, &a1, wait); | |
513 | } | |
514 | ||
515 | int svnic_dev_stats_dump(struct vnic_dev *vdev, struct vnic_stats **stats) | |
516 | { | |
517 | u64 a0, a1; | |
518 | int wait = VNIC_DVCMD_TMO; | |
519 | ||
520 | if (!vdev->stats) { | |
521 | vdev->stats = pci_alloc_consistent(vdev->pdev, | |
522 | sizeof(struct vnic_stats), &vdev->stats_pa); | |
523 | if (!vdev->stats) | |
524 | return -ENOMEM; | |
525 | } | |
526 | ||
527 | *stats = vdev->stats; | |
528 | a0 = vdev->stats_pa; | |
529 | a1 = sizeof(struct vnic_stats); | |
530 | ||
531 | return svnic_dev_cmd(vdev, CMD_STATS_DUMP, &a0, &a1, wait); | |
532 | } | |
533 | ||
534 | int svnic_dev_close(struct vnic_dev *vdev) | |
535 | { | |
536 | u64 a0 = 0, a1 = 0; | |
537 | int wait = VNIC_DVCMD_TMO; | |
538 | ||
539 | return svnic_dev_cmd(vdev, CMD_CLOSE, &a0, &a1, wait); | |
540 | } | |
541 | ||
542 | int svnic_dev_enable_wait(struct vnic_dev *vdev) | |
543 | { | |
544 | u64 a0 = 0, a1 = 0; | |
545 | int wait = VNIC_DVCMD_TMO; | |
546 | int err = 0; | |
547 | ||
548 | err = svnic_dev_cmd(vdev, CMD_ENABLE_WAIT, &a0, &a1, wait); | |
549 | if (err == ERR_ECMDUNKNOWN) | |
550 | return svnic_dev_cmd(vdev, CMD_ENABLE, &a0, &a1, wait); | |
551 | ||
552 | return err; | |
553 | } | |
554 | ||
555 | int svnic_dev_disable(struct vnic_dev *vdev) | |
556 | { | |
557 | u64 a0 = 0, a1 = 0; | |
558 | int wait = VNIC_DVCMD_TMO; | |
559 | ||
560 | return svnic_dev_cmd(vdev, CMD_DISABLE, &a0, &a1, wait); | |
561 | } | |
562 | ||
563 | int svnic_dev_open(struct vnic_dev *vdev, int arg) | |
564 | { | |
565 | u64 a0 = (u32)arg, a1 = 0; | |
566 | int wait = VNIC_DVCMD_TMO; | |
567 | ||
568 | return svnic_dev_cmd(vdev, CMD_OPEN, &a0, &a1, wait); | |
569 | } | |
570 | ||
571 | int svnic_dev_open_done(struct vnic_dev *vdev, int *done) | |
572 | { | |
573 | u64 a0 = 0, a1 = 0; | |
574 | int wait = VNIC_DVCMD_TMO; | |
575 | int err; | |
576 | ||
577 | *done = 0; | |
578 | ||
579 | err = svnic_dev_cmd(vdev, CMD_OPEN_STATUS, &a0, &a1, wait); | |
580 | if (err) | |
581 | return err; | |
582 | ||
583 | *done = (a0 == 0); | |
584 | ||
585 | return 0; | |
586 | } | |
587 | ||
588 | int svnic_dev_notify_set(struct vnic_dev *vdev, u16 intr) | |
589 | { | |
590 | u64 a0, a1; | |
591 | int wait = VNIC_DVCMD_TMO; | |
592 | ||
593 | if (!vdev->notify) { | |
594 | vdev->notify = pci_alloc_consistent(vdev->pdev, | |
595 | sizeof(struct vnic_devcmd_notify), | |
596 | &vdev->notify_pa); | |
597 | if (!vdev->notify) | |
598 | return -ENOMEM; | |
599 | } | |
600 | ||
601 | a0 = vdev->notify_pa; | |
602 | a1 = ((u64)intr << 32) & VNIC_NOTIFY_INTR_MASK; | |
603 | a1 += sizeof(struct vnic_devcmd_notify); | |
604 | ||
605 | return svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); | |
606 | } | |
607 | ||
608 | void svnic_dev_notify_unset(struct vnic_dev *vdev) | |
609 | { | |
610 | u64 a0, a1; | |
611 | int wait = VNIC_DVCMD_TMO; | |
612 | ||
613 | a0 = 0; /* paddr = 0 to unset notify buffer */ | |
614 | a1 = VNIC_NOTIFY_INTR_MASK; /* intr num = -1 to unreg for intr */ | |
615 | a1 += sizeof(struct vnic_devcmd_notify); | |
616 | ||
617 | svnic_dev_cmd(vdev, CMD_NOTIFY, &a0, &a1, wait); | |
618 | } | |
619 | ||
620 | static int vnic_dev_notify_ready(struct vnic_dev *vdev) | |
621 | { | |
622 | u32 *words; | |
623 | unsigned int nwords = sizeof(struct vnic_devcmd_notify) / 4; | |
624 | unsigned int i; | |
625 | u32 csum; | |
626 | ||
627 | if (!vdev->notify) | |
628 | return 0; | |
629 | ||
630 | do { | |
631 | csum = 0; | |
632 | memcpy(&vdev->notify_copy, vdev->notify, | |
633 | sizeof(struct vnic_devcmd_notify)); | |
634 | words = (u32 *)&vdev->notify_copy; | |
635 | for (i = 1; i < nwords; i++) | |
636 | csum += words[i]; | |
637 | } while (csum != words[0]); | |
638 | ||
639 | return 1; | |
640 | } | |
641 | ||
642 | int svnic_dev_init(struct vnic_dev *vdev, int arg) | |
643 | { | |
644 | u64 a0 = (u32)arg, a1 = 0; | |
645 | int wait = VNIC_DVCMD_TMO; | |
646 | ||
647 | return svnic_dev_cmd(vdev, CMD_INIT, &a0, &a1, wait); | |
648 | } | |
649 | ||
650 | int svnic_dev_link_status(struct vnic_dev *vdev) | |
651 | { | |
652 | if (vdev->linkstatus) | |
653 | return *vdev->linkstatus; | |
654 | ||
655 | if (!vnic_dev_notify_ready(vdev)) | |
656 | return 0; | |
657 | ||
658 | return vdev->notify_copy.link_state; | |
659 | } | |
660 | ||
661 | u32 svnic_dev_link_down_cnt(struct vnic_dev *vdev) | |
662 | { | |
663 | if (!vnic_dev_notify_ready(vdev)) | |
664 | return 0; | |
665 | ||
666 | return vdev->notify_copy.link_down_cnt; | |
667 | } | |
668 | ||
669 | void svnic_dev_set_intr_mode(struct vnic_dev *vdev, | |
670 | enum vnic_dev_intr_mode intr_mode) | |
671 | { | |
672 | vdev->intr_mode = intr_mode; | |
673 | } | |
674 | ||
675 | enum vnic_dev_intr_mode svnic_dev_get_intr_mode(struct vnic_dev *vdev) | |
676 | { | |
677 | return vdev->intr_mode; | |
678 | } | |
679 | ||
680 | void svnic_dev_unregister(struct vnic_dev *vdev) | |
681 | { | |
682 | if (vdev) { | |
683 | if (vdev->notify) | |
684 | pci_free_consistent(vdev->pdev, | |
685 | sizeof(struct vnic_devcmd_notify), | |
686 | vdev->notify, | |
687 | vdev->notify_pa); | |
688 | if (vdev->linkstatus) | |
689 | pci_free_consistent(vdev->pdev, | |
690 | sizeof(u32), | |
691 | vdev->linkstatus, | |
692 | vdev->linkstatus_pa); | |
693 | if (vdev->stats) | |
694 | pci_free_consistent(vdev->pdev, | |
695 | sizeof(struct vnic_stats), | |
696 | vdev->stats, vdev->stats_pa); | |
697 | if (vdev->fw_info) | |
698 | pci_free_consistent(vdev->pdev, | |
699 | sizeof(struct vnic_devcmd_fw_info), | |
700 | vdev->fw_info, vdev->fw_info_pa); | |
701 | if (vdev->devcmd2) | |
702 | vnic_dev_deinit_devcmd2(vdev); | |
703 | kfree(vdev); | |
704 | } | |
705 | } | |
706 | ||
707 | struct vnic_dev *svnic_dev_alloc_discover(struct vnic_dev *vdev, | |
708 | void *priv, | |
709 | struct pci_dev *pdev, | |
710 | struct vnic_dev_bar *bar, | |
711 | unsigned int num_bars) | |
712 | { | |
713 | if (!vdev) { | |
714 | vdev = kzalloc(sizeof(struct vnic_dev), GFP_ATOMIC); | |
715 | if (!vdev) | |
716 | return NULL; | |
717 | } | |
718 | ||
719 | vdev->priv = priv; | |
720 | vdev->pdev = pdev; | |
721 | ||
722 | if (vnic_dev_discover_res(vdev, bar, num_bars)) | |
723 | goto err_out; | |
724 | ||
725 | return vdev; | |
726 | ||
727 | err_out: | |
728 | svnic_dev_unregister(vdev); | |
729 | ||
730 | return NULL; | |
731 | } /* end of svnic_dev_alloc_discover */ | |
732 | ||
733 | /* | |
734 | * fallback option is left to keep the interface common for other vnics. | |
735 | */ | |
736 | int svnic_dev_cmd_init(struct vnic_dev *vdev, int fallback) | |
737 | { | |
738 | int err = -ENODEV; | |
739 | void __iomem *p; | |
740 | ||
741 | p = svnic_dev_get_res(vdev, RES_TYPE_DEVCMD2, 0); | |
742 | if (p) | |
743 | err = svnic_dev_init_devcmd2(vdev); | |
744 | else | |
745 | pr_err("DEVCMD2 resource not found.\n"); | |
746 | ||
747 | return err; | |
748 | } /* end of svnic_dev_cmd_init */ |