1 /* -*- mode: C; c-file-style: "k&r"; tab-width 4; indent-tabs-mode: t; -*- */
2
3 /*
4 * Copyright (C) 2013 Rob Clark <robclark@freedesktop.org>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
23 * SOFTWARE.
24 *
25 * Authors:
26 * Rob Clark <robclark@freedesktop.org>
27 */
28
29 #ifdef HAVE_CONFIG_H
30 # include <config.h>
31 #endif
32
33 #include <assert.h>
34
35 #include "freedreno_ringbuffer.h"
36 #include "kgsl_priv.h"
37
38
39 /* because kgsl tries to validate the gpuaddr on kernel side in ISSUEIBCMDS,
40 * we can't use normal gem bo's for ringbuffer.. someday the kernel part
41 * needs to be reworked into a single sane drm driver :-/
42 */
43 struct kgsl_rb_bo {
44 struct kgsl_pipe *pipe;
45 void *hostptr;
46 uint32_t gpuaddr;
47 uint32_t size;
48 };
49
50 struct kgsl_ringbuffer {
51 struct fd_ringbuffer base;
52 struct kgsl_rb_bo *bo;
53 };
54
to_kgsl_ringbuffer(struct fd_ringbuffer * x)55 static inline struct kgsl_ringbuffer * to_kgsl_ringbuffer(struct fd_ringbuffer *x)
56 {
57 return (struct kgsl_ringbuffer *)x;
58 }
59
kgsl_rb_bo_del(struct kgsl_rb_bo * bo)60 static void kgsl_rb_bo_del(struct kgsl_rb_bo *bo)
61 {
62 struct kgsl_sharedmem_free req = {
63 .gpuaddr = bo->gpuaddr,
64 };
65 int ret;
66
67 drm_munmap(bo->hostptr, bo->size);
68
69 ret = ioctl(bo->pipe->fd, IOCTL_KGSL_SHAREDMEM_FREE, &req);
70 if (ret) {
71 ERROR_MSG("sharedmem free failed: %s", strerror(errno));
72 }
73
74 free(bo);
75 }
76
kgsl_rb_bo_new(struct kgsl_pipe * pipe,uint32_t size)77 static struct kgsl_rb_bo * kgsl_rb_bo_new(struct kgsl_pipe *pipe, uint32_t size)
78 {
79 struct kgsl_rb_bo *bo;
80 struct kgsl_gpumem_alloc req = {
81 .size = ALIGN(size, 4096),
82 .flags = KGSL_MEMFLAGS_GPUREADONLY,
83 };
84 int ret;
85
86 bo = calloc(1, sizeof(*bo));
87 if (!bo) {
88 ERROR_MSG("allocation failed");
89 return NULL;
90 }
91 ret = ioctl(pipe->fd, IOCTL_KGSL_GPUMEM_ALLOC, &req);
92 if (ret) {
93 ERROR_MSG("gpumem allocation failed: %s", strerror(errno));
94 goto fail;
95 }
96
97 bo->pipe = pipe;
98 bo->gpuaddr = req.gpuaddr;
99 bo->size = size;
100 bo->hostptr = drm_mmap(NULL, size, PROT_WRITE|PROT_READ,
101 MAP_SHARED, pipe->fd, req.gpuaddr);
102
103 return bo;
104 fail:
105 if (bo)
106 kgsl_rb_bo_del(bo);
107 return NULL;
108 }
109
kgsl_ringbuffer_hostptr(struct fd_ringbuffer * ring)110 static void * kgsl_ringbuffer_hostptr(struct fd_ringbuffer *ring)
111 {
112 struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring);
113 return kgsl_ring->bo->hostptr;
114 }
115
kgsl_ringbuffer_flush(struct fd_ringbuffer * ring,uint32_t * last_start)116 static int kgsl_ringbuffer_flush(struct fd_ringbuffer *ring, uint32_t *last_start)
117 {
118 struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring);
119 struct kgsl_pipe *kgsl_pipe = to_kgsl_pipe(ring->pipe);
120 uint32_t offset = (uint8_t *)last_start - (uint8_t *)ring->start;
121 struct kgsl_ibdesc ibdesc = {
122 .gpuaddr = kgsl_ring->bo->gpuaddr + offset,
123 .hostptr = last_start,
124 .sizedwords = ring->cur - last_start,
125 };
126 struct kgsl_ringbuffer_issueibcmds req = {
127 .drawctxt_id = kgsl_pipe->drawctxt_id,
128 .ibdesc_addr = (unsigned long)&ibdesc,
129 .numibs = 1,
130 .flags = KGSL_CONTEXT_SUBMIT_IB_LIST,
131 };
132 int ret;
133
134 kgsl_pipe_pre_submit(kgsl_pipe);
135
136 /* z180_cmdstream_issueibcmds() is made of fail: */
137 if (ring->pipe->id == FD_PIPE_2D) {
138 /* fix up size field in last cmd packet */
139 uint32_t last_size = (uint32_t)(ring->cur - last_start);
140 /* 5 is length of first packet, 2 for the two 7f000000's */
141 last_start[2] = last_size - (5 + 2);
142 ibdesc.gpuaddr = kgsl_ring->bo->gpuaddr;
143 ibdesc.hostptr = kgsl_ring->bo->hostptr;
144 ibdesc.sizedwords = 0x145;
145 req.timestamp = (uint32_t)kgsl_ring->bo->hostptr;
146 }
147
148 do {
149 ret = ioctl(kgsl_pipe->fd, IOCTL_KGSL_RINGBUFFER_ISSUEIBCMDS, &req);
150 } while ((ret == -1) && ((errno == EINTR) || (errno == EAGAIN)));
151 if (ret)
152 ERROR_MSG("issueibcmds failed! %d (%s)", ret, strerror(errno));
153
154 ring->last_timestamp = req.timestamp;
155 ring->last_start = ring->cur;
156
157 kgsl_pipe_post_submit(kgsl_pipe, req.timestamp);
158
159 return ret;
160 }
161
kgsl_ringbuffer_emit_reloc(struct fd_ringbuffer * ring,const struct fd_reloc * r)162 static void kgsl_ringbuffer_emit_reloc(struct fd_ringbuffer *ring,
163 const struct fd_reloc *r)
164 {
165 struct kgsl_bo *kgsl_bo = to_kgsl_bo(r->bo);
166 uint32_t addr = kgsl_bo_gpuaddr(kgsl_bo, r->offset);
167 assert(addr);
168 if (r->shift < 0)
169 addr >>= -r->shift;
170 else
171 addr <<= r->shift;
172 (*ring->cur++) = addr | r->or;
173 kgsl_pipe_add_submit(to_kgsl_pipe(ring->pipe), kgsl_bo);
174 }
175
kgsl_ringbuffer_emit_reloc_ring(struct fd_ringbuffer * ring,struct fd_ringmarker * target,struct fd_ringmarker * end)176 static void kgsl_ringbuffer_emit_reloc_ring(struct fd_ringbuffer *ring,
177 struct fd_ringmarker *target, struct fd_ringmarker *end)
178 {
179 struct kgsl_ringbuffer *target_ring = to_kgsl_ringbuffer(target->ring);
180 (*ring->cur++) = target_ring->bo->gpuaddr +
181 (uint8_t *)target->cur - (uint8_t *)target->ring->start;
182 }
183
kgsl_ringbuffer_destroy(struct fd_ringbuffer * ring)184 static void kgsl_ringbuffer_destroy(struct fd_ringbuffer *ring)
185 {
186 struct kgsl_ringbuffer *kgsl_ring = to_kgsl_ringbuffer(ring);
187 if (ring->last_timestamp)
188 fd_pipe_wait(ring->pipe, ring->last_timestamp);
189 if (kgsl_ring->bo)
190 kgsl_rb_bo_del(kgsl_ring->bo);
191 free(kgsl_ring);
192 }
193
194 static const struct fd_ringbuffer_funcs funcs = {
195 .hostptr = kgsl_ringbuffer_hostptr,
196 .flush = kgsl_ringbuffer_flush,
197 .emit_reloc = kgsl_ringbuffer_emit_reloc,
198 .emit_reloc_ring = kgsl_ringbuffer_emit_reloc_ring,
199 .destroy = kgsl_ringbuffer_destroy,
200 };
201
kgsl_ringbuffer_new(struct fd_pipe * pipe,uint32_t size)202 drm_private struct fd_ringbuffer * kgsl_ringbuffer_new(struct fd_pipe *pipe,
203 uint32_t size)
204 {
205 struct kgsl_ringbuffer *kgsl_ring;
206 struct fd_ringbuffer *ring = NULL;
207
208 kgsl_ring = calloc(1, sizeof(*kgsl_ring));
209 if (!kgsl_ring) {
210 ERROR_MSG("allocation failed");
211 goto fail;
212 }
213
214 ring = &kgsl_ring->base;
215 ring->funcs = &funcs;
216
217 kgsl_ring->bo = kgsl_rb_bo_new(to_kgsl_pipe(pipe), size);
218 if (!kgsl_ring->bo) {
219 ERROR_MSG("ringbuffer allocation failed");
220 goto fail;
221 }
222
223 return ring;
224 fail:
225 if (ring)
226 fd_ringbuffer_del(ring);
227 return NULL;
228 }
229