1 /*
2 * Copyright © 2014 Broadcom
3 * Copyright © 208 Alyssa Rosenzweig
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
22 * IN THE SOFTWARE.
23 */
24
25 #include <errno.h>
26 #include <fcntl.h>
27 #include <unistd.h>
28
29 #include "util/format/u_format.h"
30 #include "util/os_file.h"
31 #include "util/u_math.h"
32 #include "util/u_memory.h"
33 #include "util/u_screen.h"
34
35 #include "drm-uapi/drm.h"
36 #include "panfrost/pan_public.h"
37 #include "renderonly/renderonly.h"
38 #include "panfrost_drm_public.h"
39 #include "xf86drm.h"
40
41 struct renderonly_scanout *
panfrost_create_kms_dumb_buffer_for_resource(struct pipe_resource * rsc,struct renderonly * ro,struct winsys_handle * out_handle)42 panfrost_create_kms_dumb_buffer_for_resource(struct pipe_resource *rsc,
43 struct renderonly *ro,
44 struct winsys_handle *out_handle)
45 {
46 /* Find the smallest width alignment that gives us a 64byte aligned stride */
47 unsigned blk_sz = util_format_get_blocksize(rsc->format);
48 struct renderonly_scanout *scanout = NULL;
49
50 assert(blk_sz);
51
52 unsigned align_w = 1;
53 for (unsigned i = 1; i <= blk_sz; i++) {
54 if (!((64 * i) % blk_sz)) {
55 align_w = (64 * i) / blk_sz;
56 break;
57 }
58 }
59
60 struct drm_mode_create_dumb create_dumb = {
61 .width = ALIGN_NPOT(rsc->width0, align_w),
62 .height = rsc->height0,
63 .bpp = util_format_get_blocksizebits(rsc->format),
64 };
65 struct drm_mode_destroy_dumb destroy_dumb = {0};
66
67 /* create dumb buffer at scanout GPU */
68 int err = drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_CREATE_DUMB, &create_dumb);
69 if (err < 0) {
70 fprintf(stderr, "DRM_IOCTL_MODE_CREATE_DUMB failed: %s\n",
71 strerror(errno));
72 return NULL;
73 }
74
75 if (create_dumb.pitch % 64)
76 goto free_dumb;
77
78 simple_mtx_lock(&ro->bo_map_lock);
79 scanout = util_sparse_array_get(&ro->bo_map, create_dumb.handle);
80 simple_mtx_unlock(&ro->bo_map_lock);
81
82 if (!scanout)
83 goto free_dumb;
84
85 scanout->handle = create_dumb.handle;
86 scanout->stride = create_dumb.pitch;
87
88 assert(p_atomic_read(&scanout->refcnt) == 0);
89 p_atomic_set(&scanout->refcnt, 1);
90
91 if (!out_handle)
92 return scanout;
93
94 /* fill in winsys handle */
95 memset(out_handle, 0, sizeof(*out_handle));
96 out_handle->type = WINSYS_HANDLE_TYPE_FD;
97 out_handle->stride = create_dumb.pitch;
98
99 err = drmPrimeHandleToFD(ro->kms_fd, create_dumb.handle, O_CLOEXEC,
100 (int *)&out_handle->handle);
101 if (err < 0) {
102 fprintf(stderr, "failed to export dumb buffer: %s\n", strerror(errno));
103 goto free_dumb;
104 }
105
106 return scanout;
107
108 free_dumb:
109 /* If an error occured, make sure we reset the scanout object before
110 * leaving.
111 */
112 if (scanout)
113 memset(scanout, 0, sizeof(*scanout));
114
115 destroy_dumb.handle = create_dumb.handle;
116 drmIoctl(ro->kms_fd, DRM_IOCTL_MODE_DESTROY_DUMB, &destroy_dumb);
117
118 return NULL;
119 }
120
121 struct pipe_screen *
panfrost_drm_screen_create(int fd,const struct pipe_screen_config * config)122 panfrost_drm_screen_create(int fd, const struct pipe_screen_config *config)
123 {
124 return u_pipe_screen_lookup_or_create(os_dupfd_cloexec(fd), config, NULL,
125 panfrost_create_screen);
126 }
127
128 struct pipe_screen *
panfrost_drm_screen_create_renderonly(int fd,struct renderonly * ro,const struct pipe_screen_config * config)129 panfrost_drm_screen_create_renderonly(int fd, struct renderonly *ro,
130 const struct pipe_screen_config *config)
131 {
132 return u_pipe_screen_lookup_or_create(os_dupfd_cloexec(fd), config, ro,
133 panfrost_create_screen);
134 }
135