1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
4 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
5 */
6
7 #include <linux/kernel.h>
8 #include <linux/errno.h>
9 #include <linux/types.h>
10 #include <linux/pci.h>
11 #include <linux/netdevice.h>
12
13 #include "wq_enet_desc.h"
14 #include "rq_enet_desc.h"
15 #include "cq_enet_desc.h"
16 #include "vnic_resource.h"
17 #include "vnic_enet.h"
18 #include "vnic_dev.h"
19 #include "vnic_wq.h"
20 #include "vnic_rq.h"
21 #include "vnic_cq.h"
22 #include "vnic_intr.h"
23 #include "vnic_stats.h"
24 #include "vnic_nic.h"
25 #include "vnic_rss.h"
26 #include "enic_res.h"
27 #include "enic.h"
28
enic_get_vnic_config(struct enic * enic)29 int enic_get_vnic_config(struct enic *enic)
30 {
31 struct vnic_enet_config *c = &enic->config;
32 int err;
33
34 err = vnic_dev_get_mac_addr(enic->vdev, enic->mac_addr);
35 if (err) {
36 dev_err(enic_get_dev(enic),
37 "Error getting MAC addr, %d\n", err);
38 return err;
39 }
40
41 #define GET_CONFIG(m) \
42 do { \
43 err = vnic_dev_spec(enic->vdev, \
44 offsetof(struct vnic_enet_config, m), \
45 sizeof(c->m), &c->m); \
46 if (err) { \
47 dev_err(enic_get_dev(enic), \
48 "Error getting %s, %d\n", #m, err); \
49 return err; \
50 } \
51 } while (0)
52
53 GET_CONFIG(flags);
54 GET_CONFIG(wq_desc_count);
55 GET_CONFIG(rq_desc_count);
56 GET_CONFIG(mtu);
57 GET_CONFIG(intr_timer_type);
58 GET_CONFIG(intr_mode);
59 GET_CONFIG(intr_timer_usec);
60 GET_CONFIG(loop_tag);
61 GET_CONFIG(num_arfs);
62
63 c->wq_desc_count =
64 min_t(u32, ENIC_MAX_WQ_DESCS,
65 max_t(u32, ENIC_MIN_WQ_DESCS,
66 c->wq_desc_count));
67 c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
68
69 c->rq_desc_count =
70 min_t(u32, ENIC_MAX_RQ_DESCS,
71 max_t(u32, ENIC_MIN_RQ_DESCS,
72 c->rq_desc_count));
73 c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
74
75 if (c->mtu == 0)
76 c->mtu = 1500;
77 c->mtu = min_t(u16, ENIC_MAX_MTU,
78 max_t(u16, ENIC_MIN_MTU,
79 c->mtu));
80
81 c->intr_timer_usec = min_t(u32, c->intr_timer_usec,
82 vnic_dev_get_intr_coal_timer_max(enic->vdev));
83
84 dev_info(enic_get_dev(enic),
85 "vNIC MAC addr %pM wq/rq %d/%d mtu %d\n",
86 enic->mac_addr, c->wq_desc_count, c->rq_desc_count, c->mtu);
87
88 dev_info(enic_get_dev(enic), "vNIC csum tx/rx %s/%s "
89 "tso/lro %s/%s rss %s intr mode %s type %s timer %d usec "
90 "loopback tag 0x%04x\n",
91 ENIC_SETTING(enic, TXCSUM) ? "yes" : "no",
92 ENIC_SETTING(enic, RXCSUM) ? "yes" : "no",
93 ENIC_SETTING(enic, TSO) ? "yes" : "no",
94 ENIC_SETTING(enic, LRO) ? "yes" : "no",
95 ENIC_SETTING(enic, RSS) ? "yes" : "no",
96 c->intr_mode == VENET_INTR_MODE_INTX ? "INTx" :
97 c->intr_mode == VENET_INTR_MODE_MSI ? "MSI" :
98 c->intr_mode == VENET_INTR_MODE_ANY ? "any" :
99 "unknown",
100 c->intr_timer_type == VENET_INTR_TYPE_MIN ? "min" :
101 c->intr_timer_type == VENET_INTR_TYPE_IDLE ? "idle" :
102 "unknown",
103 c->intr_timer_usec,
104 c->loop_tag);
105
106 return 0;
107 }
108
enic_add_vlan(struct enic * enic,u16 vlanid)109 int enic_add_vlan(struct enic *enic, u16 vlanid)
110 {
111 u64 a0 = vlanid, a1 = 0;
112 int wait = 1000;
113 int err;
114
115 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
116 if (err)
117 dev_err(enic_get_dev(enic), "Can't add vlan id, %d\n", err);
118
119 return err;
120 }
121
enic_del_vlan(struct enic * enic,u16 vlanid)122 int enic_del_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_DEL, &a0, &a1, wait);
129 if (err)
130 dev_err(enic_get_dev(enic), "Can't delete vlan id, %d\n", err);
131
132 return err;
133 }
134
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)135 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
136 u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
137 u8 ig_vlan_strip_en)
138 {
139 enum vnic_devcmd_cmd cmd = CMD_NIC_CFG;
140 u64 a0, a1;
141 u32 nic_cfg;
142 int wait = 1000;
143
144 vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
145 rss_hash_type, rss_hash_bits, rss_base_cpu,
146 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
147
148 a0 = nic_cfg;
149 a1 = 0;
150
151 if (rss_hash_type & (NIC_CFG_RSS_HASH_TYPE_UDP_IPV4 |
152 NIC_CFG_RSS_HASH_TYPE_UDP_IPV6))
153 cmd = CMD_NIC_CFG_CHK;
154
155 return vnic_dev_cmd(enic->vdev, cmd, &a0, &a1, wait);
156 }
157
enic_set_rss_key(struct enic * enic,dma_addr_t key_pa,u64 len)158 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
159 {
160 u64 a0 = (u64)key_pa, a1 = len;
161 int wait = 1000;
162
163 return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
164 }
165
enic_set_rss_cpu(struct enic * enic,dma_addr_t cpu_pa,u64 len)166 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
167 {
168 u64 a0 = (u64)cpu_pa, a1 = len;
169 int wait = 1000;
170
171 return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
172 }
173
enic_free_vnic_resources(struct enic * enic)174 void enic_free_vnic_resources(struct enic *enic)
175 {
176 unsigned int i;
177
178 for (i = 0; i < enic->wq_count; i++)
179 vnic_wq_free(&enic->wq[i]);
180 for (i = 0; i < enic->rq_count; i++)
181 vnic_rq_free(&enic->rq[i]);
182 for (i = 0; i < enic->cq_count; i++)
183 vnic_cq_free(&enic->cq[i]);
184 for (i = 0; i < enic->intr_count; i++)
185 vnic_intr_free(&enic->intr[i]);
186 }
187
enic_get_res_counts(struct enic * enic)188 void enic_get_res_counts(struct enic *enic)
189 {
190 enic->wq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ);
191 enic->rq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ);
192 enic->cq_count = vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ);
193 enic->intr_count = vnic_dev_get_res_count(enic->vdev,
194 RES_TYPE_INTR_CTRL);
195
196 dev_info(enic_get_dev(enic),
197 "vNIC resources avail: wq %d rq %d cq %d intr %d\n",
198 enic->wq_count, enic->rq_count,
199 enic->cq_count, enic->intr_count);
200 }
201
enic_init_vnic_resources(struct enic * enic)202 void enic_init_vnic_resources(struct enic *enic)
203 {
204 enum vnic_dev_intr_mode intr_mode;
205 unsigned int mask_on_assertion;
206 unsigned int interrupt_offset;
207 unsigned int error_interrupt_enable;
208 unsigned int error_interrupt_offset;
209 unsigned int cq_index;
210 unsigned int i;
211
212 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
213
214 /* Init RQ/WQ resources.
215 *
216 * RQ[0 - n-1] point to CQ[0 - n-1]
217 * WQ[0 - m-1] point to CQ[n - n+m-1]
218 *
219 * Error interrupt is not enabled for MSI.
220 */
221
222 switch (intr_mode) {
223 case VNIC_DEV_INTR_MODE_INTX:
224 case VNIC_DEV_INTR_MODE_MSIX:
225 error_interrupt_enable = 1;
226 error_interrupt_offset = enic->intr_count - 2;
227 break;
228 default:
229 error_interrupt_enable = 0;
230 error_interrupt_offset = 0;
231 break;
232 }
233
234 for (i = 0; i < enic->rq_count; i++) {
235 cq_index = i;
236 vnic_rq_init(&enic->rq[i],
237 cq_index,
238 error_interrupt_enable,
239 error_interrupt_offset);
240 }
241
242 for (i = 0; i < enic->wq_count; i++) {
243 cq_index = enic->rq_count + i;
244 vnic_wq_init(&enic->wq[i],
245 cq_index,
246 error_interrupt_enable,
247 error_interrupt_offset);
248 }
249
250 /* Init CQ resources
251 *
252 * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
253 * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
254 */
255
256 for (i = 0; i < enic->cq_count; i++) {
257
258 switch (intr_mode) {
259 case VNIC_DEV_INTR_MODE_MSIX:
260 interrupt_offset = i;
261 break;
262 default:
263 interrupt_offset = 0;
264 break;
265 }
266
267 vnic_cq_init(&enic->cq[i],
268 0 /* flow_control_enable */,
269 1 /* color_enable */,
270 0 /* cq_head */,
271 0 /* cq_tail */,
272 1 /* cq_tail_color */,
273 1 /* interrupt_enable */,
274 1 /* cq_entry_enable */,
275 0 /* cq_message_enable */,
276 interrupt_offset,
277 0 /* cq_message_addr */);
278 }
279
280 /* Init INTR resources
281 *
282 * mask_on_assertion is not used for INTx due to the level-
283 * triggered nature of INTx
284 */
285
286 switch (intr_mode) {
287 case VNIC_DEV_INTR_MODE_MSI:
288 case VNIC_DEV_INTR_MODE_MSIX:
289 mask_on_assertion = 1;
290 break;
291 default:
292 mask_on_assertion = 0;
293 break;
294 }
295
296 for (i = 0; i < enic->intr_count; i++) {
297 vnic_intr_init(&enic->intr[i],
298 enic->config.intr_timer_usec,
299 enic->config.intr_timer_type,
300 mask_on_assertion);
301 }
302 }
303
enic_alloc_vnic_resources(struct enic * enic)304 int enic_alloc_vnic_resources(struct enic *enic)
305 {
306 enum vnic_dev_intr_mode intr_mode;
307 unsigned int i;
308 int err;
309
310 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
311
312 dev_info(enic_get_dev(enic), "vNIC resources used: "
313 "wq %d rq %d cq %d intr %d intr mode %s\n",
314 enic->wq_count, enic->rq_count,
315 enic->cq_count, enic->intr_count,
316 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
317 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
318 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
319 "unknown");
320
321 /* Allocate queue resources
322 */
323
324 for (i = 0; i < enic->wq_count; i++) {
325 err = vnic_wq_alloc(enic->vdev, &enic->wq[i], i,
326 enic->config.wq_desc_count,
327 sizeof(struct wq_enet_desc));
328 if (err)
329 goto err_out_cleanup;
330 }
331
332 for (i = 0; i < enic->rq_count; i++) {
333 err = vnic_rq_alloc(enic->vdev, &enic->rq[i], i,
334 enic->config.rq_desc_count,
335 sizeof(struct rq_enet_desc));
336 if (err)
337 goto err_out_cleanup;
338 }
339
340 for (i = 0; i < enic->cq_count; i++) {
341 if (i < enic->rq_count)
342 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
343 enic->config.rq_desc_count,
344 sizeof(struct cq_enet_rq_desc));
345 else
346 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
347 enic->config.wq_desc_count,
348 sizeof(struct cq_enet_wq_desc));
349 if (err)
350 goto err_out_cleanup;
351 }
352
353 for (i = 0; i < enic->intr_count; i++) {
354 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
355 if (err)
356 goto err_out_cleanup;
357 }
358
359 /* Hook remaining resource
360 */
361
362 enic->legacy_pba = vnic_dev_get_res(enic->vdev,
363 RES_TYPE_INTR_PBA_LEGACY, 0);
364 if (!enic->legacy_pba && intr_mode == VNIC_DEV_INTR_MODE_INTX) {
365 dev_err(enic_get_dev(enic),
366 "Failed to hook legacy pba resource\n");
367 err = -ENODEV;
368 goto err_out_cleanup;
369 }
370
371 return 0;
372
373 err_out_cleanup:
374 enic_free_vnic_resources(enic);
375
376 return err;
377 }
378