Exemple #1
0
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);
}
Exemple #2
0
/* 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));
}