static int callCompute_Linux()
{
Mx_Compute *compute = NULL;
int drmFd = 0;
struct omap_device *dev = NULL;
struct omap_bo *compute_bo = NULL;
struct omap_bo *inBuf_bo = NULL;
struct omap_bo *outBuf_bo = NULL;
uint32_t * inBufPtr = NULL;
uint32_t * outBufPtr = NULL;
int status = 0;
int size;
uint32_t val;
int i;
int32_t ret;
/* On Linux, use omapdrm driver to get a Tiler buffer for shared memory */
drmFd = drmOpen("omapdrm", NULL);
if (drmFd < 0) {
fprintf(stderr, "could not open omapdrm device: %d: %s\n",
errno, strerror(errno));
return 1;
}
dev = omap_device_new(drmFd);
if (!dev) {
fprintf(stderr, "could not get device from fd\n");
goto leave;
}
/* allocate a compute structure in shared memory and get a pointer */
compute_bo = omap_bo_new(dev, sizeof(Mx_Compute), OMAP_BO_CACHED);
if (compute_bo) {
compute = (Mx_Compute *)omap_bo_map(compute_bo);
}
else {
fprintf(stderr, "failed to allocate omap_bo\n");
}
if (compute == NULL) {
fprintf(stderr, "failed to map omap_bo to user space\n");
goto leave;
}
/* initialize compute structure */
compute->coef = 0x80400000;
compute->key = 0xABA0;
compute->size = 0x1000;
compute->inBuf = NULL;
compute->outBuf = NULL;
/* allocate an input buffer in shared memory */
size = compute->size * sizeof(uint32_t);
inBuf_bo = omap_bo_new(dev, size, OMAP_BO_CACHED);
if (inBuf_bo) {
inBufPtr = (uint32_t *)omap_bo_map(inBuf_bo);
}
else {
fprintf(stderr, "failed to allocate inBuf_bo\n");
}
if (inBufPtr == NULL) {
printf("mmrpc_test: Error: inBufPtr == NULL\n");
status = -1;
goto leave;
}
/* fill input buffer with seed value */
for (i = 0; i < compute->size; i++) {
inBufPtr[i] = 0x2010;
}
/* allocate an output buffer in shared memory */
outBuf_bo = omap_bo_new(dev, size, OMAP_BO_CACHED);
if (outBuf_bo) {
outBufPtr = (uint32_t *)omap_bo_map(outBuf_bo);
}
else {
fprintf(stderr, "failed to allocate outBuf_bo handle\n");
}
if (outBufPtr == NULL) {
printf("mmrpc_test: Error: outBufPtr == NULL\n");
status = -1;
goto leave;
}
/* clear output buffer */
for (i = 0; i < compute->size; i++) {
outBufPtr[i] = 0;
}
compute->inBuf = (uint32_t *)inBufPtr;
compute->outBuf = (uint32_t *)outBufPtr;
/* print some debug info */
printf("mmrpc_test: calling Mx_compute(0x%x)\n", (unsigned int)compute);
printf("mmrpc_test: compute->coef=0x%x\n", compute->coef);
printf("mmrpc_test: compute->key=0x%x\n", compute->key);
printf("mmrpc_test: compute->size=0x%x\n", compute->size);
printf("mmrpc_test: compute->inBuf=0x%x\n", (unsigned int)compute->inBuf);
printf("mmrpc_test: compute->outBuf=0x%x\n", (unsigned int)compute->outBuf);
/* process the buffer */
ret = Mx_compute_Linux(compute, omap_bo_dmabuf(compute_bo),
omap_bo_dmabuf(inBuf_bo),
omap_bo_dmabuf(outBuf_bo));
if (ret < 0) {
status = -1;
printf("mmrpc_test: Error: Mx_Compute() failed\n");
goto leave;
}
printf("mmrpc_test: after Mx_compute(0x%x)\n", (unsigned int)compute);
printf("mmrpc_test: compute->coef=0x%x\n", compute->coef);
printf("mmrpc_test: compute->key=0x%x\n", compute->key);
printf("mmrpc_test: compute->size=0x%x\n", compute->size);
printf("mmrpc_test: compute->inBuf=0x%x\n", (unsigned int)compute->inBuf);
printf("mmrpc_test: compute->outBuf=0x%x\n", (unsigned int)compute->outBuf);
printf("mmrpc_test: compute->inBuf[0]=0x%x\n",
(unsigned int)compute->inBuf[0]);
printf("mmrpc_test: compute->outBuf[0]=0x%x\n",
(unsigned int)compute->outBuf[0]);
/* check the output buffer */
for (i = 0; i < compute->size; i++) {
val = outBufPtr[i] | compute->coef;
if (outBufPtr[i] != val) {
status = -1;
printf("mmrpc_test: Error: incorrect outBuf\n");
break;
}
}
leave:
if (outBuf_bo) {
omap_bo_del(outBuf_bo);
}
if (inBuf_bo) {
omap_bo_del(inBuf_bo);
}
if (compute_bo) {
omap_bo_del(compute_bo);
}
if (dev) {
omap_device_del(dev);
}
if (drmFd) {
close(drmFd);
}
return (status);
}
/* get buffer info */
static int get_buffer_info(struct omap_bo *bo)
{
struct drm_omap_gem_info req = {
.handle = bo->handle,
};
int ret = drmCommandWriteRead(bo->dev->fd, DRM_OMAP_GEM_INFO,
&req, sizeof(req));
if (ret) {
return ret;
}
/* really all we need for now is mmap offset */
bo->offset = req.offset;
bo->size = req.size;
return 0;
}
/* import a buffer object from DRI2 name */
drm_public struct omap_bo *
omap_bo_from_name(struct omap_device *dev, uint32_t name)
{
struct omap_bo *bo = NULL;
struct drm_gem_open req = {
.name = name,
};
pthread_mutex_lock(&table_lock);
if (drmIoctl(dev->fd, DRM_IOCTL_GEM_OPEN, &req)) {
goto fail;
}
bo = lookup_bo(dev, req.handle);
if (!bo) {
bo = bo_from_handle(dev, req.handle);
bo->name = name;
}
pthread_mutex_unlock(&table_lock);
return bo;
fail:
pthread_mutex_unlock(&table_lock);
free(bo);
return NULL;
}
/* import a buffer from dmabuf fd, does not take ownership of the
* fd so caller should close() the fd when it is otherwise done
* with it (even if it is still using the 'struct omap_bo *')
*/
drm_public struct omap_bo *
omap_bo_from_dmabuf(struct omap_device *dev, int fd)
{
struct omap_bo *bo = NULL;
struct drm_prime_handle req = {
.fd = fd,
};
int ret;
pthread_mutex_lock(&table_lock);
ret = drmIoctl(dev->fd, DRM_IOCTL_PRIME_FD_TO_HANDLE, &req);
if (ret) {
goto fail;
}
bo = lookup_bo(dev, req.handle);
if (!bo) {
bo = bo_from_handle(dev, req.handle);
}
pthread_mutex_unlock(&table_lock);
return bo;
fail:
pthread_mutex_unlock(&table_lock);
free(bo);
return NULL;
}
/* destroy a buffer object */
drm_public void omap_bo_del(struct omap_bo *bo)
{
if (!bo) {
return;
}
if (!atomic_dec_and_test(&bo->refcnt))
return;
if (bo->map) {
munmap(bo->map, bo->size);
}
if (bo->fd >= 0) {
close(bo->fd);
}
if (bo->handle) {
struct drm_gem_close req = {
.handle = bo->handle,
};
pthread_mutex_lock(&table_lock);
drmHashDelete(bo->dev->handle_table, bo->handle);
drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_CLOSE, &req);
pthread_mutex_unlock(&table_lock);
}
omap_device_del(bo->dev);
free(bo);
}
/* get the global flink/DRI2 buffer name */
drm_public int omap_bo_get_name(struct omap_bo *bo, uint32_t *name)
{
if (!bo->name) {
struct drm_gem_flink req = {
.handle = bo->handle,
};
int ret;
ret = drmIoctl(bo->dev->fd, DRM_IOCTL_GEM_FLINK, &req);
if (ret) {
return ret;
}
bo->name = req.name;
}
*name = bo->name;
return 0;
}
drm_public uint32_t omap_bo_handle(struct omap_bo *bo)
{
return bo->handle;
}
/* caller owns the dmabuf fd that is returned and is responsible
* to close() it when done
*/
drm_public int omap_bo_dmabuf(struct omap_bo *bo)
{
if (bo->fd < 0) {
struct drm_prime_handle req = {
.handle = bo->handle,
.flags = DRM_CLOEXEC,
};
int ret;
ret = drmIoctl(bo->dev->fd, DRM_IOCTL_PRIME_HANDLE_TO_FD, &req);
if (ret) {
return ret;
}
bo->fd = req.fd;
}
return dup(bo->fd);
}
drm_public uint32_t omap_bo_size(struct omap_bo *bo)
{
if (!bo->size) {
get_buffer_info(bo);
}
return bo->size;
}
drm_public void *omap_bo_map(struct omap_bo *bo)
{
if (!bo->map) {
if (!bo->offset) {
get_buffer_info(bo);
}
bo->map = mmap(0, bo->size, PROT_READ | PROT_WRITE,
MAP_SHARED, bo->dev->fd, bo->offset);
if (bo->map == MAP_FAILED) {
bo->map = NULL;
}
}
return bo->map;
}
drm_public int omap_bo_cpu_prep(struct omap_bo *bo, enum omap_gem_op op)
{
struct drm_omap_gem_cpu_prep req = {
.handle = bo->handle,
.op = op,
};
return drmCommandWrite(bo->dev->fd,
DRM_OMAP_GEM_CPU_PREP, &req, sizeof(req));
}
drm_public int omap_bo_cpu_fini(struct omap_bo *bo, enum omap_gem_op op)
{
struct drm_omap_gem_cpu_fini req = {
.handle = bo->handle,
.op = op,
.nregions = 0,
};
return drmCommandWrite(bo->dev->fd,
DRM_OMAP_GEM_CPU_FINI, &req, sizeof(req));
}