2 * Copyright 2008 Cisco Systems, Inc. All rights reserved.
3 * Copyright 2007 Nuova Systems, Inc. All rights reserved.
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.
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
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>
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"
35 #include "vnic_intr.h"
36 #include "vnic_stats.h"
42 int enic_get_vnic_config(struct enic *enic)
44 struct vnic_enet_config *c = &enic->config;
47 err = vnic_dev_mac_addr(enic->vdev, enic->mac_addr);
49 printk(KERN_ERR PFX "Error getting MAC addr, %d\n", err);
53 #define GET_CONFIG(m) \
55 err = vnic_dev_spec(enic->vdev, \
56 offsetof(struct vnic_enet_config, m), \
57 sizeof(c->m), &c->m); \
60 "Error getting %s, %d\n", #m, err); \
66 GET_CONFIG(wq_desc_count);
67 GET_CONFIG(rq_desc_count);
69 GET_CONFIG(intr_timer_type);
70 GET_CONFIG(intr_mode);
71 GET_CONFIG(intr_timer_usec);
74 min_t(u32, ENIC_MAX_WQ_DESCS,
75 max_t(u32, ENIC_MIN_WQ_DESCS,
77 c->wq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
80 min_t(u32, ENIC_MAX_RQ_DESCS,
81 max_t(u32, ENIC_MIN_RQ_DESCS,
83 c->rq_desc_count &= 0xffffffe0; /* must be aligned to groups of 32 */
87 c->mtu = min_t(u16, ENIC_MAX_MTU,
88 max_t(u16, ENIC_MIN_MTU,
91 c->intr_timer_usec = min_t(u32,
92 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
95 printk(KERN_INFO PFX "vNIC MAC addr %pM wq/rq %d/%d\n",
96 enic->mac_addr, c->wq_desc_count, c->rq_desc_count);
97 printk(KERN_INFO PFX "vNIC mtu %d csum tx/rx %d/%d tso/lro %d/%d "
98 "intr timer %d usec\n",
99 c->mtu, ENIC_SETTING(enic, TXCSUM),
100 ENIC_SETTING(enic, RXCSUM), ENIC_SETTING(enic, TSO),
101 ENIC_SETTING(enic, LRO), c->intr_timer_usec);
106 int enic_add_vlan(struct enic *enic, u16 vlanid)
108 u64 a0 = vlanid, a1 = 0;
112 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_ADD, &a0, &a1, wait);
114 printk(KERN_ERR PFX "Can't add vlan id, %d\n", err);
119 int enic_del_vlan(struct enic *enic, u16 vlanid)
121 u64 a0 = vlanid, a1 = 0;
125 err = vnic_dev_cmd(enic->vdev, CMD_VLAN_DEL, &a0, &a1, wait);
127 printk(KERN_ERR PFX "Can't delete vlan id, %d\n", err);
132 int enic_set_nic_cfg(struct enic *enic, u8 rss_default_cpu, u8 rss_hash_type,
133 u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable, u8 tso_ipid_split_en,
140 vnic_set_nic_cfg(&nic_cfg, rss_default_cpu,
141 rss_hash_type, rss_hash_bits, rss_base_cpu,
142 rss_enable, tso_ipid_split_en, ig_vlan_strip_en);
147 return vnic_dev_cmd(enic->vdev, CMD_NIC_CFG, &a0, &a1, wait);
150 int enic_set_rss_key(struct enic *enic, dma_addr_t key_pa, u64 len)
152 u64 a0 = (u64)key_pa, a1 = len;
155 return vnic_dev_cmd(enic->vdev, CMD_RSS_KEY, &a0, &a1, wait);
158 int enic_set_rss_cpu(struct enic *enic, dma_addr_t cpu_pa, u64 len)
160 u64 a0 = (u64)cpu_pa, a1 = len;
163 return vnic_dev_cmd(enic->vdev, CMD_RSS_CPU, &a0, &a1, wait);
166 void enic_free_vnic_resources(struct enic *enic)
170 for (i = 0; i < enic->wq_count; i++)
171 vnic_wq_free(&enic->wq[i]);
172 for (i = 0; i < enic->rq_count; i++)
173 vnic_rq_free(&enic->rq[i]);
174 for (i = 0; i < enic->cq_count; i++)
175 vnic_cq_free(&enic->cq[i]);
176 for (i = 0; i < enic->intr_count; i++)
177 vnic_intr_free(&enic->intr[i]);
180 void enic_get_res_counts(struct enic *enic)
182 enic->wq_count = min_t(int,
183 vnic_dev_get_res_count(enic->vdev, RES_TYPE_WQ),
185 enic->rq_count = min_t(int,
186 vnic_dev_get_res_count(enic->vdev, RES_TYPE_RQ),
188 enic->cq_count = min_t(int,
189 vnic_dev_get_res_count(enic->vdev, RES_TYPE_CQ),
191 enic->intr_count = min_t(int,
192 vnic_dev_get_res_count(enic->vdev, RES_TYPE_INTR_CTRL),
195 printk(KERN_INFO PFX "vNIC resources avail: "
196 "wq %d rq %d cq %d intr %d\n",
197 enic->wq_count, enic->rq_count,
198 enic->cq_count, enic->intr_count);
201 void enic_init_vnic_resources(struct enic *enic)
203 enum vnic_dev_intr_mode intr_mode;
204 unsigned int mask_on_assertion;
205 unsigned int interrupt_offset;
206 unsigned int error_interrupt_enable;
207 unsigned int error_interrupt_offset;
208 unsigned int cq_index;
211 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
213 /* Init RQ/WQ resources.
215 * RQ[0 - n-1] point to CQ[0 - n-1]
216 * WQ[0 - m-1] point to CQ[n - n+m-1]
218 * Error interrupt is not enabled for MSI.
222 case VNIC_DEV_INTR_MODE_INTX:
223 case VNIC_DEV_INTR_MODE_MSIX:
224 error_interrupt_enable = 1;
225 error_interrupt_offset = enic->intr_count - 2;
228 error_interrupt_enable = 0;
229 error_interrupt_offset = 0;
233 for (i = 0; i < enic->rq_count; i++) {
235 vnic_rq_init(&enic->rq[i],
237 error_interrupt_enable,
238 error_interrupt_offset);
241 for (i = 0; i < enic->wq_count; i++) {
242 cq_index = enic->rq_count + i;
243 vnic_wq_init(&enic->wq[i],
245 error_interrupt_enable,
246 error_interrupt_offset);
251 * CQ[0 - n+m-1] point to INTR[0] for INTx, MSI
252 * CQ[0 - n+m-1] point to INTR[0 - n+m-1] for MSI-X
255 for (i = 0; i < enic->cq_count; i++) {
258 case VNIC_DEV_INTR_MODE_MSIX:
259 interrupt_offset = i;
262 interrupt_offset = 0;
266 vnic_cq_init(&enic->cq[i],
267 0 /* flow_control_enable */,
268 1 /* color_enable */,
271 1 /* cq_tail_color */,
272 1 /* interrupt_enable */,
273 1 /* cq_entry_enable */,
274 0 /* cq_message_enable */,
276 0 /* cq_message_addr */);
279 /* Init INTR resources
281 * mask_on_assertion is not used for INTx due to the level-
282 * triggered nature of INTx
286 case VNIC_DEV_INTR_MODE_MSI:
287 case VNIC_DEV_INTR_MODE_MSIX:
288 mask_on_assertion = 1;
291 mask_on_assertion = 0;
295 for (i = 0; i < enic->intr_count; i++) {
296 vnic_intr_init(&enic->intr[i],
297 INTR_COALESCE_USEC_TO_HW(enic->config.intr_timer_usec),
298 enic->config.intr_timer_type,
303 int enic_alloc_vnic_resources(struct enic *enic)
305 enum vnic_dev_intr_mode intr_mode;
309 intr_mode = vnic_dev_get_intr_mode(enic->vdev);
311 printk(KERN_INFO PFX "vNIC resources used: "
312 "wq %d rq %d cq %d intr %d intr mode %s\n",
313 enic->wq_count, enic->rq_count,
314 enic->cq_count, enic->intr_count,
315 intr_mode == VNIC_DEV_INTR_MODE_INTX ? "legacy PCI INTx" :
316 intr_mode == VNIC_DEV_INTR_MODE_MSI ? "MSI" :
317 intr_mode == VNIC_DEV_INTR_MODE_MSIX ? "MSI-X" :
321 /* Allocate queue resources
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));
329 goto err_out_cleanup;
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));
337 goto err_out_cleanup;
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));
346 err = vnic_cq_alloc(enic->vdev, &enic->cq[i], i,
347 enic->config.wq_desc_count,
348 sizeof(struct cq_enet_wq_desc));
350 goto err_out_cleanup;
353 for (i = 0; i < enic->intr_count; i++) {
354 err = vnic_intr_alloc(enic->vdev, &enic->intr[i], i);
356 goto err_out_cleanup;
359 /* Hook remaining resource
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 printk(KERN_ERR PFX "Failed to hook legacy pba resource\n");
367 goto err_out_cleanup;
373 enic_free_vnic_resources(enic);