2 * Copyright (C) 2016 Nexell Co., Ltd.
3 * Author: SeongO, Park <ray@nexell.co.kr>
17 #include <sys/types.h>
19 #include <sys/ioctl.h>
20 #include <sys/mman.h> // PROT_READ/PROT_WRITE/MAP_SHARED/mmap/munmap
22 #include <nexell/nexell_drm.h>
23 #include <nx_video_alloc.h>
25 #include <libdrm/drm_fourcc.h>
26 #include <linux/videodev2.h>
27 #include <linux/videodev2_nxp_media.h>
29 #define DRM_DEVICE_NAME "/dev/dri/card0"
31 #define DRM_IOCTL_NR(n) _IOC_NR(n)
32 #define DRM_IOC_VOID _IOC_NONE
33 #define DRM_IOC_READ _IOC_READ
34 #define DRM_IOC_WRITE _IOC_WRITE
35 #define DRM_IOC_READWRITE _IOC_READ|_IOC_WRITE
36 #define DRM_IOC(dir, group, nr, size) _IOC(dir, group, nr, size)
39 drm_ioctl (int32_t drm_fd, uint32_t request, void *arg)
44 ret = ioctl (drm_fd, request, arg);
45 } while (ret == -1 && (errno == EINTR || errno == EAGAIN));
50 drm_command_write_read (int fd, uint32_t command_index,
51 void *data, uint32_t size)
55 request = DRM_IOC (DRM_IOC_READ | DRM_IOC_WRITE, DRM_IOCTL_BASE,
56 DRM_COMMAND_BASE + command_index, size);
57 if (drm_ioctl (fd, request, data))
66 alloc_gem (int drm_fd, int size, int flags)
68 struct nx_drm_gem_create arg = { 0, };
71 arg.size = (uint32_t) size;
74 ret = drm_command_write_read (drm_fd, DRM_NX_GEM_CREATE, &arg, sizeof (arg));
76 perror ("drm_command_write_read\n");
79 //printf("[DRM ALLOC] gem %d, size %d, flags 0x%x\n", arg.handle, size, flags);
85 free_gem (int drm_fd, int gem)
87 struct drm_gem_close arg = { 0, };
90 drm_ioctl (drm_fd, DRM_IOCTL_GEM_CLOSE, &arg);
97 gem_to_dmafd (int drm_fd, int gem_fd)
100 struct drm_prime_handle arg = { 0, };
103 arg.flags = O_CLOEXEC | O_RDWR;
104 ret = drm_ioctl (drm_fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &arg);
106 printf ("fail : get fd from gem:%d (DRM_IOCTL_PRIME_HANDLE_TO_FD)\n", ret);
113 get_flink_name (int fd, int gem)
115 struct drm_gem_flink arg = { 0, };
118 if (drm_ioctl (fd, DRM_IOCTL_GEM_FLINK, &arg)) {
119 printf ("fail : get flink from gem:%d (DRM_IOCTL_GEM_FLINK)\n", gem);
126 gem_from_flink (int fd, uint32_t flink_name)
128 struct drm_gem_open arg = { 0, };
129 /* struct nx_drm_gem_info info = { 0, }; */
131 arg.name = flink_name;
132 if (drm_ioctl (fd, DRM_IOCTL_GEM_OPEN, &arg)) {
133 printf ("fail : cannot open gem name=%d\n", flink_name);
141 // Nexell Private Video Memory Allocator for DRM
145 #define ALIGN(X,N) ( (X+N-1) & (~(N-1)) )
148 #define ALIGNED16(X) ALIGN(X,16)
151 // Nexell Private Memory Allocator
153 NX_AllocateMemory (int size, int align)
158 NX_MEMORY_INFO *pMem;
160 int drmFd = open (DRM_DEVICE_NAME, O_RDWR);
164 drmDropMaster (drmFd);
166 gemFd = alloc_gem (drmFd, size, flags);
170 dmaFd = gem_to_dmafd (drmFd, gemFd);
174 pMem = (NX_MEMORY_INFO *) calloc (1, sizeof (NX_MEMORY_INFO));
178 pMem->flink = get_flink_name (drmFd, gemFd);
185 free_gem (drmFd, gemFd);
193 NX_FreeMemory (NX_MEMORY_INFO * pMem)
197 munmap (pMem->pBuffer, pMem->size);
200 free_gem (pMem->drmFd, pMem->gemFd);
208 // Video Specific Allocator Wrapper
210 // Suport Format & Planes
212 // 1 Plane : I420, NV12
217 NX_AllocateVideoMemory (int width, int height, int32_t planes, uint32_t format,
220 int gemFd[NX_MAX_PLANES] = { 0, };
221 int dmaFd[NX_MAX_PLANES] = { 0, };
222 int32_t flags = 0, i = 0;
223 int32_t luStride, cStride;
224 int32_t luVStride, cVStride;
225 int32_t stride[NX_MAX_PLANES];
226 int32_t size[NX_MAX_PLANES];
227 uint32_t flink[NX_MAX_PLANES];
229 NX_VID_MEMORY_INFO *pVidMem;
231 int drmFd = open (DRM_DEVICE_NAME, O_RDWR);
235 drmDropMaster (drmFd);
238 luStride = ALIGN (width, 32);
239 luVStride = ALIGN (height, 16);
243 case DRM_FORMAT_YUV420:
244 case DRM_FORMAT_NV12:
245 case DRM_FORMAT_NV21:
246 case V4L2_PIX_FMT_YUV420M:
247 case V4L2_PIX_FMT_NV12M:
248 case V4L2_PIX_FMT_NV21M:
249 cStride = luStride / 2;
250 cVStride = ALIGN (height / 2, 16);
253 case DRM_FORMAT_YUV422:
254 case DRM_FORMAT_NV16:
255 case DRM_FORMAT_NV61:
256 case V4L2_PIX_FMT_YUV422M:
257 #if 0 // Disabled by DIGNSYS
258 case V4L2_PIX_FMT_NV16M:
259 case V4L2_PIX_FMT_NV61M:
261 cStride = luStride / 2;
262 cVStride = luVStride;
265 case DRM_FORMAT_YUV444:
266 //case DRM_FORMAT_NV24:
267 //case DRM_FORMAT_NV42:
268 case V4L2_PIX_FMT_YUV444M:
269 case V4L2_PIX_FMT_NV24M:
270 case V4L2_PIX_FMT_NV42M:
272 cVStride = luVStride;
275 case V4L2_PIX_FMT_GREY:
280 printf ("Unknown format type\n");
284 // Decide Memory Size
287 size[0] = luStride * luVStride + cStride * cVStride * 2;
288 stride[0] = luStride;
289 gemFd[0] = alloc_gem (drmFd, size[0], flags);
292 dmaFd[0] = gem_to_dmafd (drmFd, gemFd[0]);
295 flink[0] = get_flink_name (drmFd, gemFd[0]);
299 size[0] = luStride * luVStride;
300 stride[0] = luStride;
301 gemFd[0] = alloc_gem (drmFd, size[0], flags);
304 dmaFd[0] = gem_to_dmafd (drmFd, gemFd[0]);
307 flink[0] = get_flink_name (drmFd, gemFd[0]);
310 size[1] = cStride * cVStride * 2;
311 stride[1] = cStride * 2;
312 gemFd[1] = alloc_gem (drmFd, size[1], flags);
315 dmaFd[1] = gem_to_dmafd (drmFd, gemFd[1]);
318 flink[1] = get_flink_name (drmFd, gemFd[1]);
322 size[0] = luStride * luVStride;
323 stride[0] = luStride;
324 gemFd[0] = alloc_gem (drmFd, size[0], flags);
327 dmaFd[0] = gem_to_dmafd (drmFd, gemFd[0]);
330 flink[0] = get_flink_name (drmFd, gemFd[0]);
333 size[1] = cStride * cVStride;
335 gemFd[1] = alloc_gem (drmFd, size[1], flags);
338 dmaFd[1] = gem_to_dmafd (drmFd, gemFd[1]);
341 flink[1] = get_flink_name (drmFd, gemFd[1]);
344 size[2] = cStride * cVStride;
346 gemFd[2] = alloc_gem (drmFd, size[2], flags);
349 dmaFd[2] = gem_to_dmafd (drmFd, gemFd[2]);
352 flink[2] = get_flink_name (drmFd, gemFd[2]);
357 pVidMem = (NX_VID_MEMORY_INFO *) calloc (1, sizeof (NX_VID_MEMORY_INFO));
358 pVidMem->width = width;
359 pVidMem->height = height;
360 pVidMem->align = align;
361 pVidMem->planes = planes;
362 pVidMem->format = format;
363 pVidMem->drmFd = drmFd;
364 for (i = 0; i < planes; i++) {
365 pVidMem->dmaFd[i] = dmaFd[i];
366 pVidMem->gemFd[i] = gemFd[i];
367 pVidMem->size[i] = size[i];
368 pVidMem->stride[i] = stride[i];
369 pVidMem->flink[i] = flink[i];
374 for (i = 0; i < planes; i++) {
376 free_gem (drmFd, gemFd[i]);
389 NX_FreeVideoMemory (NX_VID_MEMORY_INFO * pMem)
393 for (i = 0; i < pMem->planes; i++) {
394 if (pMem->pBuffer[i]) {
395 munmap (pMem->pBuffer[i], pMem->size[i]);
397 free_gem (pMem->drmFd, pMem->gemFd[i]);
398 close (pMem->dmaFd[i]);
407 // Memory Mapping/Unmapping Memory
410 NX_MapMemory (NX_MEMORY_INFO * pMem)
421 mmap (0, pMem->size, PROT_READ | PROT_WRITE, MAP_SHARED, pMem->dmaFd, 0);
422 if (pBuf == MAP_FAILED) {
423 printf("Map failed : size %d, fd %d, error : %s\n", pMem->size, pMem->dmaFd, strerror(errno));
426 pMem->pBuffer = pBuf;
432 NX_UnmapMemory (NX_MEMORY_INFO * pMem)
440 if (0 != munmap (pMem->pBuffer, pMem->size))
443 pMem->pBuffer = NULL;
448 NX_MapVideoMemory (NX_VID_MEMORY_INFO * pMem)
456 for (i = 0; i < pMem->planes; i++) {
457 if (pMem->pBuffer[i])
461 mmap (0, pMem->size[i], PROT_READ | PROT_WRITE, MAP_SHARED,
463 if (pBuf == MAP_FAILED) {
467 pMem->pBuffer[i] = pBuf;
473 NX_UnmapVideoMemory (NX_VID_MEMORY_INFO * pMem)
478 for (i = 0; i < pMem->planes; i++) {
479 if (pMem->pBuffer[i]) {
480 munmap (pMem->pBuffer[i], pMem->size[i]);
488 NX_GetGEMHandles (int drmFd, NX_VID_MEMORY_INFO * pMem,
489 uint32_t handles[NX_MAX_PLANES])
492 memset (handles, 0, sizeof (uint32_t) * NX_MAX_PLANES);
494 for (i = 0; i < pMem->planes; i++) {
495 handles[i] = gem_from_flink (drmFd, pMem->flink[i]);
496 if (0 > (int) handles[i]) {
504 NX_GetGemHandle (int drmFd, NX_VID_MEMORY_INFO * pMem, int32_t plane)
506 if (plane >= NX_MAX_PLANES || plane < 0)
509 return gem_from_flink (drmFd, pMem->flink[plane]);