2 * Copyright (c) 2013, Cisco Systems, Inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/errno.h>
34 #include <linux/pci.h>
37 #include "vnic_resource.h"
38 #include "usnic_log.h"
39 #include "usnic_vnic.h"
42 struct vnic_dev *vdev;
43 struct vnic_dev_bar bar[PCI_NUM_RESOURCES];
44 struct usnic_vnic_res_chunk chunks[USNIC_VNIC_RES_TYPE_MAX];
48 static enum vnic_res_type _to_vnic_res_type(enum usnic_vnic_res_type res_type)
50 #define DEFINE_USNIC_VNIC_RES_AT(usnic_vnic_res_t, vnic_res_type, desc, val) \
52 #define DEFINE_USNIC_VNIC_RES(usnic_vnic_res_t, vnic_res_type, desc) \
54 static enum vnic_res_type usnic_vnic_type_2_vnic_type[] = {
55 USNIC_VNIC_RES_TYPES};
56 #undef DEFINE_USNIC_VNIC_RES
57 #undef DEFINE_USNIC_VNIC_RES_AT
59 if (res_type >= USNIC_VNIC_RES_TYPE_MAX)
62 return usnic_vnic_type_2_vnic_type[res_type];
65 const char *usnic_vnic_res_type_to_str(enum usnic_vnic_res_type res_type)
67 #define DEFINE_USNIC_VNIC_RES_AT(usnic_vnic_res_t, vnic_res_type, desc, val) \
69 #define DEFINE_USNIC_VNIC_RES(usnic_vnic_res_t, vnic_res_type, desc) \
71 static const char * const usnic_vnic_res_type_desc[] = {
72 USNIC_VNIC_RES_TYPES};
73 #undef DEFINE_USNIC_VNIC_RES
74 #undef DEFINE_USNIC_VNIC_RES_AT
76 if (res_type >= USNIC_VNIC_RES_TYPE_MAX)
79 return usnic_vnic_res_type_desc[res_type];
83 const char *usnic_vnic_pci_name(struct usnic_vnic *vnic)
85 return pci_name(usnic_vnic_get_pdev(vnic));
88 int usnic_vnic_dump(struct usnic_vnic *vnic, char *buf,
91 int (*printtitle)(void *, char*, int),
92 int (*printcols)(char *, int),
93 int (*printrow)(void *, char *, int))
95 struct usnic_vnic_res_chunk *chunk;
96 struct usnic_vnic_res *res;
97 struct vnic_dev_bar *bar0;
101 bar0 = usnic_vnic_get_bar(vnic, 0);
102 offset += scnprintf(buf + offset, buf_sz - offset,
103 "VF:%hu BAR0 bus_addr=%pa vaddr=0x%p size=%ld ",
104 usnic_vnic_get_index(vnic),
106 bar0->vaddr, bar0->len);
108 offset += printtitle(hdr_obj, buf + offset, buf_sz - offset);
109 offset += scnprintf(buf + offset, buf_sz - offset, "\n");
110 offset += scnprintf(buf + offset, buf_sz - offset,
111 "|RES\t|CTRL_PIN\t\t|IN_USE\t");
113 offset += printcols(buf + offset, buf_sz - offset);
114 offset += scnprintf(buf + offset, buf_sz - offset, "\n");
116 spin_lock(&vnic->res_lock);
117 for (i = 0; i < ARRAY_SIZE(vnic->chunks); i++) {
118 chunk = &vnic->chunks[i];
119 for (j = 0; j < chunk->cnt; j++) {
121 offset += scnprintf(buf + offset, buf_sz - offset,
122 "|%s[%u]\t|0x%p\t|%u\t",
123 usnic_vnic_res_type_to_str(res->type),
124 res->vnic_idx, res->ctrl, !!res->owner);
126 offset += printrow(res->owner, buf + offset,
129 offset += scnprintf(buf + offset, buf_sz - offset,
133 spin_unlock(&vnic->res_lock);
137 void usnic_vnic_res_spec_update(struct usnic_vnic_res_spec *spec,
138 enum usnic_vnic_res_type trgt_type,
143 for (i = 0; i < USNIC_VNIC_RES_TYPE_MAX; i++) {
144 if (spec->resources[i].type == trgt_type) {
145 spec->resources[i].cnt = cnt;
153 int usnic_vnic_res_spec_satisfied(const struct usnic_vnic_res_spec *min_spec,
154 struct usnic_vnic_res_spec *res_spec)
158 for (i = 0; i < USNIC_VNIC_RES_TYPE_MAX; i++) {
161 for (j = 0; j < USNIC_VNIC_RES_TYPE_MAX; j++) {
162 if (res_spec->resources[i].type !=
163 min_spec->resources[i].type)
166 if (min_spec->resources[i].cnt >
167 res_spec->resources[i].cnt)
178 int usnic_vnic_spec_dump(char *buf, int buf_sz,
179 struct usnic_vnic_res_spec *res_spec)
181 enum usnic_vnic_res_type res_type;
186 for (i = 0; i < USNIC_VNIC_RES_TYPE_MAX; i++) {
187 res_type = res_spec->resources[i].type;
188 res_cnt = res_spec->resources[i].cnt;
189 offset += scnprintf(buf + offset, buf_sz - offset,
191 usnic_vnic_res_type_to_str(res_type),
198 int usnic_vnic_check_room(struct usnic_vnic *vnic,
199 struct usnic_vnic_res_spec *res_spec)
202 enum usnic_vnic_res_type res_type;
205 for (i = 0; i < USNIC_VNIC_RES_TYPE_MAX; i++) {
206 res_type = res_spec->resources[i].type;
207 res_cnt = res_spec->resources[i].cnt;
209 if (res_type == USNIC_VNIC_RES_TYPE_EOL)
212 if (res_cnt > usnic_vnic_res_free_cnt(vnic, res_type))
219 int usnic_vnic_res_cnt(struct usnic_vnic *vnic,
220 enum usnic_vnic_res_type type)
222 return vnic->chunks[type].cnt;
225 int usnic_vnic_res_free_cnt(struct usnic_vnic *vnic,
226 enum usnic_vnic_res_type type)
228 return vnic->chunks[type].free_cnt;
231 struct usnic_vnic_res_chunk *
232 usnic_vnic_get_resources(struct usnic_vnic *vnic, enum usnic_vnic_res_type type,
233 int cnt, void *owner)
235 struct usnic_vnic_res_chunk *src, *ret;
236 struct usnic_vnic_res *res;
239 if (usnic_vnic_res_free_cnt(vnic, type) < cnt || cnt < 0 || !owner)
240 return ERR_PTR(-EINVAL);
242 ret = kzalloc(sizeof(*ret), GFP_ATOMIC);
244 return ERR_PTR(-ENOMEM);
247 ret->res = kcalloc(cnt, sizeof(*(ret->res)), GFP_ATOMIC);
250 return ERR_PTR(-ENOMEM);
253 spin_lock(&vnic->res_lock);
254 src = &vnic->chunks[type];
255 for (i = 0; i < src->cnt && ret->cnt < cnt; i++) {
260 ret->res[ret->cnt++] = res;
264 spin_unlock(&vnic->res_lock);
268 WARN_ON(ret->cnt != cnt);
273 void usnic_vnic_put_resources(struct usnic_vnic_res_chunk *chunk)
276 struct usnic_vnic_res *res;
278 struct usnic_vnic *vnic = chunk->vnic;
280 if (chunk->cnt > 0) {
281 spin_lock(&vnic->res_lock);
282 while ((i = --chunk->cnt) >= 0) {
284 chunk->res[i] = NULL;
286 vnic->chunks[res->type].free_cnt++;
288 spin_unlock(&vnic->res_lock);
295 u16 usnic_vnic_get_index(struct usnic_vnic *vnic)
297 return usnic_vnic_get_pdev(vnic)->devfn - 1;
300 static int usnic_vnic_alloc_res_chunk(struct usnic_vnic *vnic,
301 enum usnic_vnic_res_type type,
302 struct usnic_vnic_res_chunk *chunk)
305 struct usnic_vnic_res *res;
307 cnt = vnic_dev_get_res_count(vnic->vdev, _to_vnic_res_type(type));
309 usnic_err("Wrong res count with cnt %d\n", cnt);
313 chunk->cnt = chunk->free_cnt = cnt;
314 chunk->res = kcalloc(cnt, sizeof(*(chunk->res)), GFP_KERNEL);
318 for (i = 0; i < cnt; i++) {
319 res = kzalloc(sizeof(*res), GFP_KERNEL);
327 res->ctrl = vnic_dev_get_res(vnic->vdev,
328 _to_vnic_res_type(type), i);
335 for (i--; i >= 0; i--)
336 kfree(chunk->res[i]);
341 static void usnic_vnic_free_res_chunk(struct usnic_vnic_res_chunk *chunk)
344 for (i = 0; i < chunk->cnt; i++)
345 kfree(chunk->res[i]);
349 static int usnic_vnic_discover_resources(struct pci_dev *pdev,
350 struct usnic_vnic *vnic)
352 enum usnic_vnic_res_type res_type;
356 for (i = 0; i < ARRAY_SIZE(vnic->bar); i++) {
357 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
359 vnic->bar[i].len = pci_resource_len(pdev, i);
360 vnic->bar[i].vaddr = pci_iomap(pdev, i, vnic->bar[i].len);
361 if (!vnic->bar[i].vaddr) {
362 usnic_err("Cannot memory-map BAR %d, aborting\n",
367 vnic->bar[i].bus_addr = pci_resource_start(pdev, i);
370 vnic->vdev = vnic_dev_register(NULL, pdev, pdev, vnic->bar,
371 ARRAY_SIZE(vnic->bar));
373 usnic_err("Failed to register device %s\n",
379 for (res_type = USNIC_VNIC_RES_TYPE_EOL + 1;
380 res_type < USNIC_VNIC_RES_TYPE_MAX; res_type++) {
381 err = usnic_vnic_alloc_res_chunk(vnic, res_type,
382 &vnic->chunks[res_type]);
384 goto out_clean_chunks;
390 for (res_type--; res_type > USNIC_VNIC_RES_TYPE_EOL; res_type--)
391 usnic_vnic_free_res_chunk(&vnic->chunks[res_type]);
392 vnic_dev_unregister(vnic->vdev);
394 for (i = 0; i < ARRAY_SIZE(vnic->bar); i++) {
395 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
397 if (!vnic->bar[i].vaddr)
400 iounmap(vnic->bar[i].vaddr);
406 struct pci_dev *usnic_vnic_get_pdev(struct usnic_vnic *vnic)
408 return vnic_dev_get_pdev(vnic->vdev);
411 struct vnic_dev_bar *usnic_vnic_get_bar(struct usnic_vnic *vnic,
414 return (bar_num < ARRAY_SIZE(vnic->bar)) ? &vnic->bar[bar_num] : NULL;
417 static void usnic_vnic_release_resources(struct usnic_vnic *vnic)
420 struct pci_dev *pdev;
421 enum usnic_vnic_res_type res_type;
423 pdev = usnic_vnic_get_pdev(vnic);
425 for (res_type = USNIC_VNIC_RES_TYPE_EOL + 1;
426 res_type < USNIC_VNIC_RES_TYPE_MAX; res_type++)
427 usnic_vnic_free_res_chunk(&vnic->chunks[res_type]);
429 vnic_dev_unregister(vnic->vdev);
431 for (i = 0; i < ARRAY_SIZE(vnic->bar); i++) {
432 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
434 iounmap(vnic->bar[i].vaddr);
438 struct usnic_vnic *usnic_vnic_alloc(struct pci_dev *pdev)
440 struct usnic_vnic *vnic;
443 if (!pci_is_enabled(pdev)) {
444 usnic_err("PCI dev %s is disabled\n", pci_name(pdev));
445 return ERR_PTR(-EINVAL);
448 vnic = kzalloc(sizeof(*vnic), GFP_KERNEL);
450 return ERR_PTR(-ENOMEM);
452 spin_lock_init(&vnic->res_lock);
454 err = usnic_vnic_discover_resources(pdev, vnic);
456 usnic_err("Failed to discover %s resources with err %d\n",
457 pci_name(pdev), err);
461 usnic_dbg("Allocated vnic for %s\n", usnic_vnic_pci_name(vnic));
471 void usnic_vnic_free(struct usnic_vnic *vnic)
473 usnic_vnic_release_resources(vnic);