This source file includes following definitions.
- vnic_wq_get_ctrl
- vnic_wq_alloc_ring
- vnic_wq_alloc_bufs
- svnic_wq_free
- vnic_wq_devcmd2_alloc
- svnic_wq_alloc
- vnic_wq_init_start
- svnic_wq_init
- svnic_wq_error_status
- svnic_wq_enable
- svnic_wq_disable
- svnic_wq_clean
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18 #include <linux/errno.h>
19 #include <linux/types.h>
20 #include <linux/pci.h>
21 #include <linux/delay.h>
22 #include <linux/slab.h>
23 #include "vnic_dev.h"
24 #include "vnic_wq.h"
25
26 static inline int vnic_wq_get_ctrl(struct vnic_dev *vdev, struct vnic_wq *wq,
27 unsigned int index, enum vnic_res_type res_type)
28 {
29 wq->ctrl = svnic_dev_get_res(vdev, res_type, index);
30 if (!wq->ctrl)
31 return -EINVAL;
32
33 return 0;
34 }
35
36 static inline int vnic_wq_alloc_ring(struct vnic_dev *vdev, struct vnic_wq *wq,
37 unsigned int index, unsigned int desc_count, unsigned int desc_size)
38 {
39 return svnic_dev_alloc_desc_ring(vdev, &wq->ring, desc_count,
40 desc_size);
41 }
42
43 static int vnic_wq_alloc_bufs(struct vnic_wq *wq)
44 {
45 struct vnic_wq_buf *buf;
46 unsigned int i, j, count = wq->ring.desc_count;
47 unsigned int blks = VNIC_WQ_BUF_BLKS_NEEDED(count);
48
49 for (i = 0; i < blks; i++) {
50 wq->bufs[i] = kzalloc(VNIC_WQ_BUF_BLK_SZ, GFP_ATOMIC);
51 if (!wq->bufs[i]) {
52 pr_err("Failed to alloc wq_bufs\n");
53
54 return -ENOMEM;
55 }
56 }
57
58 for (i = 0; i < blks; i++) {
59 buf = wq->bufs[i];
60 for (j = 0; j < VNIC_WQ_BUF_DFLT_BLK_ENTRIES; j++) {
61 buf->index = i * VNIC_WQ_BUF_DFLT_BLK_ENTRIES + j;
62 buf->desc = (u8 *)wq->ring.descs +
63 wq->ring.desc_size * buf->index;
64 if (buf->index + 1 == count) {
65 buf->next = wq->bufs[0];
66 break;
67 } else if (j + 1 == VNIC_WQ_BUF_DFLT_BLK_ENTRIES) {
68 buf->next = wq->bufs[i + 1];
69 } else {
70 buf->next = buf + 1;
71 buf++;
72 }
73 }
74 }
75
76 wq->to_use = wq->to_clean = wq->bufs[0];
77
78 return 0;
79 }
80
81 void svnic_wq_free(struct vnic_wq *wq)
82 {
83 struct vnic_dev *vdev;
84 unsigned int i;
85
86 vdev = wq->vdev;
87
88 svnic_dev_free_desc_ring(vdev, &wq->ring);
89
90 for (i = 0; i < VNIC_WQ_BUF_BLKS_MAX; i++) {
91 kfree(wq->bufs[i]);
92 wq->bufs[i] = NULL;
93 }
94
95 wq->ctrl = NULL;
96
97 }
98
99 int vnic_wq_devcmd2_alloc(struct vnic_dev *vdev, struct vnic_wq *wq,
100 unsigned int desc_count, unsigned int desc_size)
101 {
102 int err;
103
104 wq->index = 0;
105 wq->vdev = vdev;
106
107 err = vnic_wq_get_ctrl(vdev, wq, 0, RES_TYPE_DEVCMD2);
108 if (err) {
109 pr_err("Failed to get devcmd2 resource\n");
110
111 return err;
112 }
113
114 svnic_wq_disable(wq);
115
116 err = vnic_wq_alloc_ring(vdev, wq, 0, desc_count, desc_size);
117 if (err)
118 return err;
119
120 return 0;
121 }
122
123 int svnic_wq_alloc(struct vnic_dev *vdev, struct vnic_wq *wq,
124 unsigned int index, unsigned int desc_count, unsigned int desc_size)
125 {
126 int err;
127
128 wq->index = index;
129 wq->vdev = vdev;
130
131 err = vnic_wq_get_ctrl(vdev, wq, index, RES_TYPE_WQ);
132 if (err) {
133 pr_err("Failed to hook WQ[%d] resource\n", index);
134
135 return err;
136 }
137
138 svnic_wq_disable(wq);
139
140 err = vnic_wq_alloc_ring(vdev, wq, index, desc_count, desc_size);
141 if (err)
142 return err;
143
144 err = vnic_wq_alloc_bufs(wq);
145 if (err) {
146 svnic_wq_free(wq);
147
148 return err;
149 }
150
151 return 0;
152 }
153
154 void vnic_wq_init_start(struct vnic_wq *wq, unsigned int cq_index,
155 unsigned int fetch_index, unsigned int posted_index,
156 unsigned int error_interrupt_enable,
157 unsigned int error_interrupt_offset)
158 {
159 u64 paddr;
160 unsigned int count = wq->ring.desc_count;
161
162 paddr = (u64)wq->ring.base_addr | VNIC_PADDR_TARGET;
163 writeq(paddr, &wq->ctrl->ring_base);
164 iowrite32(count, &wq->ctrl->ring_size);
165 iowrite32(fetch_index, &wq->ctrl->fetch_index);
166 iowrite32(posted_index, &wq->ctrl->posted_index);
167 iowrite32(cq_index, &wq->ctrl->cq_index);
168 iowrite32(error_interrupt_enable, &wq->ctrl->error_interrupt_enable);
169 iowrite32(error_interrupt_offset, &wq->ctrl->error_interrupt_offset);
170 iowrite32(0, &wq->ctrl->error_status);
171
172 wq->to_use = wq->to_clean =
173 &wq->bufs[fetch_index / VNIC_WQ_BUF_BLK_ENTRIES(count)]
174 [fetch_index % VNIC_WQ_BUF_BLK_ENTRIES(count)];
175 }
176
177 void svnic_wq_init(struct vnic_wq *wq, unsigned int cq_index,
178 unsigned int error_interrupt_enable,
179 unsigned int error_interrupt_offset)
180 {
181 vnic_wq_init_start(wq, cq_index, 0, 0, error_interrupt_enable,
182 error_interrupt_offset);
183 }
184
185 unsigned int svnic_wq_error_status(struct vnic_wq *wq)
186 {
187 return ioread32(&wq->ctrl->error_status);
188 }
189
190 void svnic_wq_enable(struct vnic_wq *wq)
191 {
192 iowrite32(1, &wq->ctrl->enable);
193 }
194
195 int svnic_wq_disable(struct vnic_wq *wq)
196 {
197 unsigned int wait;
198
199 iowrite32(0, &wq->ctrl->enable);
200
201
202 for (wait = 0; wait < 100; wait++) {
203 if (!(ioread32(&wq->ctrl->running)))
204 return 0;
205 udelay(1);
206 }
207
208 pr_err("Failed to disable WQ[%d]\n", wq->index);
209
210 return -ETIMEDOUT;
211 }
212
213 void svnic_wq_clean(struct vnic_wq *wq,
214 void (*buf_clean)(struct vnic_wq *wq, struct vnic_wq_buf *buf))
215 {
216 struct vnic_wq_buf *buf;
217
218 BUG_ON(ioread32(&wq->ctrl->enable));
219
220 buf = wq->to_clean;
221
222 while (svnic_wq_desc_used(wq) > 0) {
223
224 (*buf_clean)(wq, buf);
225
226 buf = wq->to_clean = buf->next;
227 wq->ring.desc_avail++;
228 }
229
230 wq->to_use = wq->to_clean = wq->bufs[0];
231
232 iowrite32(0, &wq->ctrl->fetch_index);
233 iowrite32(0, &wq->ctrl->posted_index);
234 iowrite32(0, &wq->ctrl->error_status);
235
236 svnic_dev_clear_desc_ring(&wq->ring);
237 }