Remove useless checks for NULL before freeing
[mesa.git] / src / gallium / drivers / r300 / r300_screen_buffer.c
1 /*
2 * Copyright 2010 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * on the rights to use, copy, modify, merge, publish, distribute, sub
8 * license, and/or sell copies of the Software, and to permit persons to whom
9 * the Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
21 * USE OR OTHER DEALINGS IN THE SOFTWARE.
22 *
23 * Authors: Dave Airlie
24 */
25
26 #include <stdio.h>
27
28 #include "util/u_inlines.h"
29 #include "util/u_memory.h"
30 #include "util/u_upload_mgr.h"
31 #include "util/u_math.h"
32
33 #include "r300_screen_buffer.h"
34
35 void r300_upload_index_buffer(struct r300_context *r300,
36 struct pipe_resource **index_buffer,
37 unsigned index_size, unsigned *start,
38 unsigned count, const uint8_t *ptr)
39 {
40 unsigned index_offset;
41
42 *index_buffer = NULL;
43
44 u_upload_data(r300->uploader,
45 0, count * index_size,
46 ptr + (*start * index_size),
47 &index_offset,
48 index_buffer);
49
50 *start = index_offset / index_size;
51 }
52
53 static void r300_buffer_destroy(struct pipe_screen *screen,
54 struct pipe_resource *buf)
55 {
56 struct r300_resource *rbuf = r300_resource(buf);
57
58 FREE(rbuf->malloced_buffer);
59
60 if (rbuf->buf)
61 pb_reference(&rbuf->buf, NULL);
62
63 FREE(rbuf);
64 }
65
66 static struct pipe_transfer*
67 r300_buffer_get_transfer(struct pipe_context *context,
68 struct pipe_resource *resource,
69 unsigned level,
70 unsigned usage,
71 const struct pipe_box *box)
72 {
73 struct r300_context *r300 = r300_context(context);
74 struct pipe_transfer *transfer =
75 util_slab_alloc(&r300->pool_transfers);
76
77 transfer->resource = resource;
78 transfer->level = level;
79 transfer->usage = usage;
80 transfer->box = *box;
81 transfer->stride = 0;
82 transfer->layer_stride = 0;
83 transfer->data = NULL;
84
85 /* Note strides are zero, this is ok for buffers, but not for
86 * textures 2d & higher at least.
87 */
88 return transfer;
89 }
90
91 static void r300_buffer_transfer_destroy(struct pipe_context *pipe,
92 struct pipe_transfer *transfer)
93 {
94 struct r300_context *r300 = r300_context(pipe);
95 util_slab_free(&r300->pool_transfers, transfer);
96 }
97
98 static void *
99 r300_buffer_transfer_map( struct pipe_context *pipe,
100 struct pipe_transfer *transfer )
101 {
102 struct r300_context *r300 = r300_context(pipe);
103 struct r300_screen *r300screen = r300_screen(pipe->screen);
104 struct radeon_winsys *rws = r300screen->rws;
105 struct r300_resource *rbuf = r300_resource(transfer->resource);
106 uint8_t *map;
107 enum pipe_transfer_usage usage;
108
109 if (rbuf->malloced_buffer)
110 return (uint8_t *) rbuf->malloced_buffer + transfer->box.x;
111
112 /* Buffers are never used for write, therefore mapping for read can be
113 * unsynchronized. */
114 usage = transfer->usage;
115 if (!(usage & PIPE_TRANSFER_WRITE)) {
116 usage |= PIPE_TRANSFER_UNSYNCHRONIZED;
117 }
118
119 map = rws->buffer_map(rbuf->cs_buf, r300->cs, usage);
120
121 if (map == NULL)
122 return NULL;
123
124 return map + transfer->box.x;
125 }
126
127 static void r300_buffer_transfer_unmap( struct pipe_context *pipe,
128 struct pipe_transfer *transfer )
129 {
130 /* no-op */
131 }
132
133 static const struct u_resource_vtbl r300_buffer_vtbl =
134 {
135 NULL, /* get_handle */
136 r300_buffer_destroy, /* resource_destroy */
137 r300_buffer_get_transfer, /* get_transfer */
138 r300_buffer_transfer_destroy, /* transfer_destroy */
139 r300_buffer_transfer_map, /* transfer_map */
140 NULL, /* transfer_flush_region */
141 r300_buffer_transfer_unmap, /* transfer_unmap */
142 NULL /* transfer_inline_write */
143 };
144
145 struct pipe_resource *r300_buffer_create(struct pipe_screen *screen,
146 const struct pipe_resource *templ)
147 {
148 struct r300_screen *r300screen = r300_screen(screen);
149 struct r300_resource *rbuf;
150 unsigned alignment = 16;
151
152 rbuf = MALLOC_STRUCT(r300_resource);
153
154 rbuf->b.b = *templ;
155 rbuf->b.vtbl = &r300_buffer_vtbl;
156 pipe_reference_init(&rbuf->b.b.reference, 1);
157 rbuf->b.b.screen = screen;
158 rbuf->domain = RADEON_DOMAIN_GTT;
159 rbuf->buf = NULL;
160 rbuf->malloced_buffer = NULL;
161
162 /* Alloc constant buffers and SWTCL buffers in RAM. */
163 if (templ->bind & PIPE_BIND_CONSTANT_BUFFER ||
164 (!r300screen->caps.has_tcl &&
165 (templ->bind & (PIPE_BIND_VERTEX_BUFFER | PIPE_BIND_INDEX_BUFFER)))) {
166 rbuf->malloced_buffer = MALLOC(templ->width0);
167 return &rbuf->b.b;
168 }
169
170 rbuf->buf =
171 r300screen->rws->buffer_create(r300screen->rws,
172 rbuf->b.b.width0, alignment,
173 rbuf->b.b.bind, rbuf->domain);
174 if (!rbuf->buf) {
175 FREE(rbuf);
176 return NULL;
177 }
178
179 rbuf->cs_buf =
180 r300screen->rws->buffer_get_cs_handle(rbuf->buf);
181
182 return &rbuf->b.b;
183 }