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video: tegra: host: pin with specific permission

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[1] Facilitate pinning of buffer with user requested access
    permission
[2] This feature allows to restrict access to buffers shared
    with the device.

Jira DLA-2502

Change-Id: I175ad10922480689de57eb832040a7d59b29b9bd
Signed-off-by: Arvind M <am@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2209415
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Ken Adams <kadams@nvidia.com>
Reviewed-by: Prashant Gaikwad <pgaikwad@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Arvind M
2019-09-30 14:25:34 +05:30
committed by Laxman Dewangan
parent 9343525fd1
commit 31a4285b17
2 changed files with 21 additions and 6 deletions
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12
drivers/video/tegra/host/nvdla/nvdla_ioctl.c
View File

@@ -167,7 +167,7 @@ fail_to_send_fence:
static int nvdla_pin(struct nvdla_private *priv, void *arg)
{
u32 handles[MAX_NVDLA_PIN_BUFFERS];
struct nvdla_mem_share_handle handles[MAX_NVDLA_PIN_BUFFERS];
struct dma_buf *dmabufs[MAX_NVDLA_PIN_BUFFERS];
int err = 0;
int i = 0;
@@ -194,14 +194,14 @@ static int nvdla_pin(struct nvdla_private *priv, void *arg)
nvdla_dbg_info(pdev, "num of buffers [%d]", count);
if (copy_from_user(handles, (void __user *)buf_list->buffers,
(count * sizeof(u32)))) {
(count * sizeof(struct nvdla_mem_share_handle)))) {
err = -EFAULT;
goto nvdla_buffer_cpy_err;
}
/* get the dmabuf pointer from the fd handle */
for (i = 0; i < count; i++) {
dmabufs[i] = dma_buf_get(handles[i]);
dmabufs[i] = dma_buf_get(handles[i].share_id);
if (IS_ERR_OR_NULL(dmabufs[i])) {
err = -EFAULT;
goto fail_to_get_dma_buf;
@@ -222,7 +222,7 @@ fail_to_get_val_arg:
static int nvdla_unpin(struct nvdla_private *priv, void *arg)
{
u32 handles[MAX_NVDLA_PIN_BUFFERS];
struct nvdla_mem_share_handle handles[MAX_NVDLA_PIN_BUFFERS];
struct dma_buf *dmabufs[MAX_NVDLA_PIN_BUFFERS];
int err = 0;
int i = 0;
@@ -249,14 +249,14 @@ static int nvdla_unpin(struct nvdla_private *priv, void *arg)
nvdla_dbg_info(pdev, "num of buffers [%d]", count);
if (copy_from_user(handles, (void __user *)buf_list->buffers,
(count * sizeof(u32)))) {
(count * sizeof(struct nvdla_mem_share_handle)))) {
err = -EFAULT;
goto nvdla_buffer_cpy_err;
}
/* get the dmabuf pointer and clean valid ones */
for (i = 0; i < count; i++) {
dmabufs[i] = dma_buf_get(handles[i]);
dmabufs[i] = dma_buf_get(handles[i].share_id);
if (IS_ERR_OR_NULL(dmabufs[i]))
continue;
}

15
include/uapi/linux/nvhost_nvdla_ioctl.h
View File

@@ -52,6 +52,21 @@ struct nvdla_ping_args {
__u32 out_response;
};
/**
* struct nvdla_mem_share_handle structure for sharing memory identifier
* and its properties
*
* @share_id identifier of handle to be shared
* @offset offset within the shared memory
* @access_flags access with which memory is intended to be shared
* @reserved reserved for future use
**/
struct nvdla_mem_share_handle {
__u32 share_id;
__u32 offset;
__u32 access_flags;
__u32 reserved;
};
/**
* struct nvdla_pin_unpin_args strcture args for buffer pin/unpin