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 GET_CONFIG(num_arfs);
75
76 c->wq_desc_count =
77 min_t(u32, ENIC_MAX_WQ_DESCS,
78 max_t(u32, ENIC_MIN_WQ_DESCS,
79 c->wq_desc_count));
80 c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
81
82 c->rq_desc_count =
83 min_t(u32, ENIC_MAX_RQ_DESCS,
84 max_t(u32, ENIC_MIN_RQ_DESCS,
85 c->rq_desc_count));
86 c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
87
88 if (c->mtu == 0)
89 c->mtu = 1500;
90 c->mtu = min_t(u16, ENIC_MAX_MTU,
91 max_t(u16, ENIC_MIN_MTU,
92 c->mtu));
93
94 c->intr_timer_usec = min_t(u32, c->intr_timer_usec,
95 vnic_dev_get_intr_coal_timer_max(enic->vdev));
96
97 dev_info(enic_get_dev(enic),
98 "vNIC MAC addr %pM wq/rq %d/%d mtu %d\n",
99 enic->mac_addr, c->wq_desc_count, c->rq_desc_count, c->mtu);
100
101 dev_info(enic_get_dev(enic), "vNIC csum tx/rx %s/%s "
102 "tso/lro %s/%s rss %s intr mode %s type %s timer %d usec "
103 "loopback tag 0x%04x\n",
104 ENIC_SETTING(enic, TXCSUM) ? "yes" : "no",
105 ENIC_SETTING(enic, RXCSUM) ? "yes" : "no",
106 ENIC_SETTING(enic, TSO) ? "yes" : "no",
107 ENIC_SETTING(enic, LRO) ? "yes" : "no",
108 ENIC_SETTING(enic, RSS) ? "yes" : "no",
109 c->intr_mode == VENET_INTR_MODE_INTX ? "INTx" :
110 c->intr_mode == VENET_INTR_MODE_MSI ? "MSI" :
111 c->intr_mode == VENET_INTR_MODE_ANY ? "any" :
112 "unknown",
113 c->intr_timer_type == VENET_INTR_TYPE_MIN ? "min" :
114 c->intr_timer_type == VENET_INTR_TYPE_IDLE ? "idle" :
115 "unknown",
116 c->intr_timer_usec,
117 c->loop_tag);
118
119 return 0;
120 }
121
enic_add_vlan(struct enic * enic,u16 vlanid)122 int enic_add_vlan(struct enic *enic, u16 vlanid)
123 {
124 u64 a0 = vlanid, a1 = 0;
125 int wait = 1000;
126 int err;
127
128 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
129 if (err)
130 dev_err(enic_get_dev(enic), "Can't add vlan id, %d\n", err);
131
132 return err;
133 }
134
enic_del_vlan(struct enic * enic,u16 vlanid)135 int enic_del_vlan(struct enic *enic, u16 vlanid)
136 {
137 u64 a0 = vlanid, a1 = 0;
138 int wait = 1000;
139 int err;
140
141 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
142 if (err)
143 dev_err(enic_get_dev(enic), "Can't delete vlan id, %d\n", err);
144
145 return err;
146 }
147
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)148 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
149 u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
150 u8 ig_vlan_strip_en)
151 {
152 enum vnic_devcmd_cmd cmd = CMD_NIC_CFG;
153 u64 a0, a1;
154 u32 nic_cfg;
155 int wait = 1000;
156
157 vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
158 rss_hash_type, rss_hash_bits, rss_base_cpu,
159 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
160
161 a0 = nic_cfg;
162 a1 = 0;
163
164 if (rss_hash_type & (NIC_CFG_RSS_HASH_TYPE_UDP_IPV4 |
165 NIC_CFG_RSS_HASH_TYPE_UDP_IPV6))
166 cmd = CMD_NIC_CFG_CHK;
167
168 return vnic_dev_cmd(enic->vdev, cmd, &a0, &a1, wait);
169 }
170
enic_set_rss_key(struct enic * enic,dma_addr_t key_pa,u64 len)171 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
172 {
173 u64 a0 = (u64)key_pa, a1 = len;
174 int wait = 1000;
175
176 return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
177 }
178
enic_set_rss_cpu(struct enic * enic,dma_addr_t cpu_pa,u64 len)179 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
180 {
181 u64 a0 = (u64)cpu_pa, a1 = len;
182 int wait = 1000;
183
184 return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
185 }
186
enic_free_vnic_resources(struct enic * enic)187 void enic_free_vnic_resources(struct enic *enic)
188 {
189 unsigned int i;
190
191 for (i = 0; i < enic->wq_count; i++)
192 vnic_wq_free(&enic->wq[i]);
193 for (i = 0; i < enic->rq_count; i++)
194 vnic_rq_free(&enic->rq[i]);
195 for (i = 0; i < enic->cq_count; i++)
196 vnic_cq_free(&enic->cq[i]);
197 for (i = 0; i < enic->intr_count; i++)
198 vnic_intr_free(&enic->intr[i]);
199 }
200
enic_get_res_counts(struct enic * enic)201 void enic_get_res_counts(struct enic *enic)
202 {
203 enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
204 enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
205 enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
206 enic->intr_count = vnic_dev_get_res_count(enic->vdev,
207 RES_TYPE_INTR_CTRL);
208
209 dev_info(enic_get_dev(enic),
210 "vNIC resources avail: wq %d rq %d cq %d intr %d\n",
211 enic->wq_count, enic->rq_count,
212 enic->cq_count, enic->intr_count);
213 }
214
enic_init_vnic_resources(struct enic * enic)215 void enic_init_vnic_resources(struct enic *enic)
216 {
217 enum vnic_dev_intr_mode intr_mode;
218 unsigned int mask_on_assertion;
219 unsigned int interrupt_offset;
220 unsigned int error_interrupt_enable;
221 unsigned int error_interrupt_offset;
222 unsigned int cq_index;
223 unsigned int i;
224
225 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
226
227 /* Init RQ/WQ resources.
228 *
229 * RQ[0 - n-1] point to CQ[0 - n-1]
230 * WQ[0 - m-1] point to CQ[n - n+m-1]
231 *
232 * Error interrupt is not enabled for MSI.
233 */
234
235 switch (intr_mode) {
236 case VNIC_DEV_INTR_MODE_INTX:
237 case VNIC_DEV_INTR_MODE_MSIX:
238 error_interrupt_enable = 1;
239 error_interrupt_offset = enic->intr_count - 2;
240 break;
241 default:
242 error_interrupt_enable = 0;
243 error_interrupt_offset = 0;
244 break;
245 }
246
247 for (i = 0; i < enic->rq_count; i++) {
248 cq_index = i;
249 vnic_rq_init(&enic->rq[i],
250 cq_index,
251 error_interrupt_enable,
252 error_interrupt_offset);
253 }
254
255 for (i = 0; i < enic->wq_count; i++) {
256 cq_index = enic->rq_count + i;
257 vnic_wq_init(&enic->wq[i],
258 cq_index,
259 error_interrupt_enable,
260 error_interrupt_offset);
261 }
262
263 /* Init CQ resources
264 *
265 * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
266 * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
267 */
268
269 for (i = 0; i < enic->cq_count; i++) {
270
271 switch (intr_mode) {
272 case VNIC_DEV_INTR_MODE_MSIX:
273 interrupt_offset = i;
274 break;
275 default:
276 interrupt_offset = 0;
277 break;
278 }
279
280 vnic_cq_init(&enic->cq[i],
281 0 /* flow_control_enable */,
282 1 /* color_enable */,
283 0 /* cq_head */,
284 0 /* cq_tail */,
285 1 /* cq_tail_color */,
286 1 /* interrupt_enable */,
287 1 /* cq_entry_enable */,
288 0 /* cq_message_enable */,
289 interrupt_offset,
290 0 /* cq_message_addr */);
291 }
292
293 /* Init INTR resources
294 *
295 * mask_on_assertion is not used for INTx due to the level-
296 * triggered nature of INTx
297 */
298
299 switch (intr_mode) {
300 case VNIC_DEV_INTR_MODE_MSI:
301 case VNIC_DEV_INTR_MODE_MSIX:
302 mask_on_assertion = 1;
303 break;
304 default:
305 mask_on_assertion = 0;
306 break;
307 }
308
309 for (i = 0; i < enic->intr_count; i++) {
310 vnic_intr_init(&enic->intr[i],
311 enic->config.intr_timer_usec,
312 enic->config.intr_timer_type,
313 mask_on_assertion);
314 }
315 }
316
enic_alloc_vnic_resources(struct enic * enic)317 int enic_alloc_vnic_resources(struct enic *enic)
318 {
319 enum vnic_dev_intr_mode intr_mode;
320 unsigned int i;
321 int err;
322
323 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
324
325 dev_info(enic_get_dev(enic), "vNIC resources used: "
326 "wq %d rq %d cq %d intr %d intr mode %s\n",
327 enic->wq_count, enic->rq_count,
328 enic->cq_count, enic->intr_count,
329 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
330 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
331 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
332 "unknown");
333
334 /* Allocate queue resources
335 */
336
337 for (i = 0; i < enic->wq_count; i++) {
338 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
339 enic->config.wq_desc_count,
340 sizeof(struct wq_enet_desc));
341 if (err)
342 goto err_out_cleanup;
343 }
344
345 for (i = 0; i < enic->rq_count; i++) {
346 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
347 enic->config.rq_desc_count,
348 sizeof(struct rq_enet_desc));
349 if (err)
350 goto err_out_cleanup;
351 }
352
353 for (i = 0; i < enic->cq_count; i++) {
354 if (i < enic->rq_count)
355 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
356 enic->config.rq_desc_count,
357 sizeof(struct cq_enet_rq_desc));
358 else
359 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
360 enic->config.wq_desc_count,
361 sizeof(struct cq_enet_wq_desc));
362 if (err)
363 goto err_out_cleanup;
364 }
365
366 for (i = 0; i < enic->intr_count; i++) {
367 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
368 if (err)
369 goto err_out_cleanup;
370 }
371
372 /* Hook remaining resource
373 */
374
375 enic->legacy_pba = vnic_dev_get_res(enic->vdev,
376 RES_TYPE_INTR_PBA_LEGACY, 0);
377 if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
378 dev_err(enic_get_dev(enic),
379 "Failed to hook legacy pba resource\n");
380 err = -ENODEV;
381 goto err_out_cleanup;
382 }
383
384 return 0;
385
386 err_out_cleanup:
387 enic_free_vnic_resources(enic);
388
389 return err;
390 }
391