1 /*
2 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
4 *
5 * This program is free software; you may redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; version 2 of the License.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
10 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
11 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
12 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
13 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
14 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
15 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
16 * SOFTWARE.
17 *
18 */
19
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/types.h>
23 #include <linux/pci.h>
24 #include <linux/netdevice.h>
25
26 #include "wq_enet_desc.h"
27 #include "rq_enet_desc.h"
28 #include "cq_enet_desc.h"
29 #include "vnic_resource.h"
30 #include "vnic_enet.h"
31 #include "vnic_dev.h"
32 #include "vnic_wq.h"
33 #include "vnic_rq.h"
34 #include "vnic_cq.h"
35 #include "vnic_intr.h"
36 #include "vnic_stats.h"
37 #include "vnic_nic.h"
38 #include "vnic_rss.h"
39 #include "enic_res.h"
40 #include "enic.h"
41
enic_get_vnic_config(struct enic * enic)42 int enic_get_vnic_config(struct enic *enic)
43 {
44 struct vnic_enet_config *c = &enic->config;
45 int err;
46
47 err = vnic_dev_get_mac_addr(enic->vdev, enic->mac_addr);
48 if (err) {
49 dev_err(enic_get_dev(enic),
50 "Error getting MAC addr, %d\n", err);
51 return err;
52 }
53
54 #define GET_CONFIG(m) \
55 do { \
56 err = vnic_dev_spec(enic->vdev, \
57 offsetof(struct vnic_enet_config, m), \
58 sizeof(c->m), &c->m); \
59 if (err) { \
60 dev_err(enic_get_dev(enic), \
61 "Error getting %s, %d\n", #m, err); \
62 return err; \
63 } \
64 } while (0)
65
66 GET_CONFIG(flags);
67 GET_CONFIG(wq_desc_count);
68 GET_CONFIG(rq_desc_count);
69 GET_CONFIG(mtu);
70 GET_CONFIG(intr_timer_type);
71 GET_CONFIG(intr_mode);
72 GET_CONFIG(intr_timer_usec);
73 GET_CONFIG(loop_tag);
74
75 c->wq_desc_count =
76 min_t(u32, ENIC_MAX_WQ_DESCS,
77 max_t(u32, ENIC_MIN_WQ_DESCS,
78 c->wq_desc_count));
79 c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
80
81 c->rq_desc_count =
82 min_t(u32, ENIC_MAX_RQ_DESCS,
83 max_t(u32, ENIC_MIN_RQ_DESCS,
84 c->rq_desc_count));
85 c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
86
87 if (c->mtu == 0)
88 c->mtu = 1500;
89 c->mtu = min_t(u16, ENIC_MAX_MTU,
90 max_t(u16, ENIC_MIN_MTU,
91 c->mtu));
92
93 c->intr_timer_usec = min_t(u32, c->intr_timer_usec,
94 vnic_dev_get_intr_coal_timer_max(enic->vdev));
95
96 dev_info(enic_get_dev(enic),
97 "vNIC MAC addr %pM wq/rq %d/%d mtu %d\n",
98 enic->mac_addr, c->wq_desc_count, c->rq_desc_count, c->mtu);
99
100 dev_info(enic_get_dev(enic), "vNIC csum tx/rx %s/%s "
101 "tso/lro %s/%s rss %s intr mode %s type %s timer %d usec "
102 "loopback tag 0x%04x\n",
103 ENIC_SETTING(enic, TXCSUM) ? "yes" : "no",
104 ENIC_SETTING(enic, RXCSUM) ? "yes" : "no",
105 ENIC_SETTING(enic, TSO) ? "yes" : "no",
106 ENIC_SETTING(enic, LRO) ? "yes" : "no",
107 ENIC_SETTING(enic, RSS) ? "yes" : "no",
108 c->intr_mode == VENET_INTR_MODE_INTX ? "INTx" :
109 c->intr_mode == VENET_INTR_MODE_MSI ? "MSI" :
110 c->intr_mode == VENET_INTR_MODE_ANY ? "any" :
111 "unknown",
112 c->intr_timer_type == VENET_INTR_TYPE_MIN ? "min" :
113 c->intr_timer_type == VENET_INTR_TYPE_IDLE ? "idle" :
114 "unknown",
115 c->intr_timer_usec,
116 c->loop_tag);
117
118 return 0;
119 }
120
enic_add_vlan(struct enic * enic,u16 vlanid)121 int enic_add_vlan(struct enic *enic, u16 vlanid)
122 {
123 u64 a0 = vlanid, a1 = 0;
124 int wait = 1000;
125 int err;
126
127 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
128 if (err)
129 dev_err(enic_get_dev(enic), "Can't add vlan id, %d\n", err);
130
131 return err;
132 }
133
enic_del_vlan(struct enic * enic,u16 vlanid)134 int enic_del_vlan(struct enic *enic, u16 vlanid)
135 {
136 u64 a0 = vlanid, a1 = 0;
137 int wait = 1000;
138 int err;
139
140 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
141 if (err)
142 dev_err(enic_get_dev(enic), "Can't delete vlan id, %d\n", err);
143
144 return err;
145 }
146
enic_set_nic_cfg(struct enic * enic,u8 rss_default_cpu,u8 rss_hash_type,u8 rss_hash_bits,u8 rss_base_cpu,u8 rss_enable,u8 tso_ipid_split_en,u8 ig_vlan_strip_en)147 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
148 u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
149 u8 ig_vlan_strip_en)
150 {
151 u64 a0, a1;
152 u32 nic_cfg;
153 int wait = 1000;
154
155 vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
156 rss_hash_type, rss_hash_bits, rss_base_cpu,
157 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
158
159 a0 = nic_cfg;
160 a1 = 0;
161
162 return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
163 }
164
enic_set_rss_key(struct enic * enic,dma_addr_t key_pa,u64 len)165 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
166 {
167 u64 a0 = (u64)key_pa, a1 = len;
168 int wait = 1000;
169
170 return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
171 }
172
enic_set_rss_cpu(struct enic * enic,dma_addr_t cpu_pa,u64 len)173 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
174 {
175 u64 a0 = (u64)cpu_pa, a1 = len;
176 int wait = 1000;
177
178 return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
179 }
180
enic_free_vnic_resources(struct enic * enic)181 void enic_free_vnic_resources(struct enic *enic)
182 {
183 unsigned int i;
184
185 for (i = 0; i < enic->wq_count; i++)
186 vnic_wq_free(&enic->wq[i]);
187 for (i = 0; i < enic->rq_count; i++)
188 vnic_rq_free(&enic->rq[i]);
189 for (i = 0; i < enic->cq_count; i++)
190 vnic_cq_free(&enic->cq[i]);
191 for (i = 0; i < enic->intr_count; i++)
192 vnic_intr_free(&enic->intr[i]);
193 }
194
enic_get_res_counts(struct enic * enic)195 void enic_get_res_counts(struct enic *enic)
196 {
197 enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
198 enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
199 enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
200 enic->intr_count = vnic_dev_get_res_count(enic->vdev,
201 RES_TYPE_INTR_CTRL);
202
203 dev_info(enic_get_dev(enic),
204 "vNIC resources avail: wq %d rq %d cq %d intr %d\n",
205 enic->wq_count, enic->rq_count,
206 enic->cq_count, enic->intr_count);
207 }
208
enic_init_vnic_resources(struct enic * enic)209 void enic_init_vnic_resources(struct enic *enic)
210 {
211 enum vnic_dev_intr_mode intr_mode;
212 unsigned int mask_on_assertion;
213 unsigned int interrupt_offset;
214 unsigned int error_interrupt_enable;
215 unsigned int error_interrupt_offset;
216 unsigned int cq_index;
217 unsigned int i;
218
219 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
220
221 /* Init RQ/WQ resources.
222 *
223 * RQ[0 - n-1] point to CQ[0 - n-1]
224 * WQ[0 - m-1] point to CQ[n - n+m-1]
225 *
226 * Error interrupt is not enabled for MSI.
227 */
228
229 switch (intr_mode) {
230 case VNIC_DEV_INTR_MODE_INTX:
231 case VNIC_DEV_INTR_MODE_MSIX:
232 error_interrupt_enable = 1;
233 error_interrupt_offset = enic->intr_count - 2;
234 break;
235 default:
236 error_interrupt_enable = 0;
237 error_interrupt_offset = 0;
238 break;
239 }
240
241 for (i = 0; i < enic->rq_count; i++) {
242 cq_index = i;
243 vnic_rq_init(&enic->rq[i],
244 cq_index,
245 error_interrupt_enable,
246 error_interrupt_offset);
247 }
248
249 for (i = 0; i < enic->wq_count; i++) {
250 cq_index = enic->rq_count + i;
251 vnic_wq_init(&enic->wq[i],
252 cq_index,
253 error_interrupt_enable,
254 error_interrupt_offset);
255 }
256
257 /* Init CQ resources
258 *
259 * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
260 * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
261 */
262
263 for (i = 0; i < enic->cq_count; i++) {
264
265 switch (intr_mode) {
266 case VNIC_DEV_INTR_MODE_MSIX:
267 interrupt_offset = i;
268 break;
269 default:
270 interrupt_offset = 0;
271 break;
272 }
273
274 vnic_cq_init(&enic->cq[i],
275 0 /* flow_control_enable */,
276 1 /* color_enable */,
277 0 /* cq_head */,
278 0 /* cq_tail */,
279 1 /* cq_tail_color */,
280 1 /* interrupt_enable */,
281 1 /* cq_entry_enable */,
282 0 /* cq_message_enable */,
283 interrupt_offset,
284 0 /* cq_message_addr */);
285 }
286
287 /* Init INTR resources
288 *
289 * mask_on_assertion is not used for INTx due to the level-
290 * triggered nature of INTx
291 */
292
293 switch (intr_mode) {
294 case VNIC_DEV_INTR_MODE_MSI:
295 case VNIC_DEV_INTR_MODE_MSIX:
296 mask_on_assertion = 1;
297 break;
298 default:
299 mask_on_assertion = 0;
300 break;
301 }
302
303 for (i = 0; i < enic->intr_count; i++) {
304 vnic_intr_init(&enic->intr[i],
305 enic->config.intr_timer_usec,
306 enic->config.intr_timer_type,
307 mask_on_assertion);
308 }
309 }
310
enic_alloc_vnic_resources(struct enic * enic)311 int enic_alloc_vnic_resources(struct enic *enic)
312 {
313 enum vnic_dev_intr_mode intr_mode;
314 unsigned int i;
315 int err;
316
317 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
318
319 dev_info(enic_get_dev(enic), "vNIC resources used: "
320 "wq %d rq %d cq %d intr %d intr mode %s\n",
321 enic->wq_count, enic->rq_count,
322 enic->cq_count, enic->intr_count,
323 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
324 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
325 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
326 "unknown");
327
328 /* Allocate queue resources
329 */
330
331 for (i = 0; i < enic->wq_count; i++) {
332 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
333 enic->config.wq_desc_count,
334 sizeof(struct wq_enet_desc));
335 if (err)
336 goto err_out_cleanup;
337 }
338
339 for (i = 0; i < enic->rq_count; i++) {
340 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
341 enic->config.rq_desc_count,
342 sizeof(struct rq_enet_desc));
343 if (err)
344 goto err_out_cleanup;
345 }
346
347 for (i = 0; i < enic->cq_count; i++) {
348 if (i < enic->rq_count)
349 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
350 enic->config.rq_desc_count,
351 sizeof(struct cq_enet_rq_desc));
352 else
353 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
354 enic->config.wq_desc_count,
355 sizeof(struct cq_enet_wq_desc));
356 if (err)
357 goto err_out_cleanup;
358 }
359
360 for (i = 0; i < enic->intr_count; i++) {
361 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
362 if (err)
363 goto err_out_cleanup;
364 }
365
366 /* Hook remaining resource
367 */
368
369 enic->legacy_pba = vnic_dev_get_res(enic->vdev,
370 RES_TYPE_INTR_PBA_LEGACY, 0);
371 if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
372 dev_err(enic_get_dev(enic),
373 "Failed to hook legacy pba resource\n");
374 err = -ENODEV;
375 goto err_out_cleanup;
376 }
377
378 return 0;
379
380 err_out_cleanup:
381 enic_free_vnic_resources(enic);
382
383 return err;
384 }
385