On 22 January 2017 at 18:48, Emil Velikov <emil.l.velikov@xxxxxxxxx> wrote:
> All one needs is to establish if dev->fd is the flink (primary/card)
> node, rather than use DRM_IOCTL_GET_CLIENT to query the auth status.
>
> The latter is [somewhat] deprecated and incorrect. We need to know [and
> store] the primary node FD, since we're going to use it [at a later
> stage] for buffer import/export sharing.
>
> Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Emil Velikov <emil.l.velikov@xxxxxxxxx>
> ---
> Again not 100% sure but things look quite fishy as-is... The
> conditionals might be off.
>
> Note: original code [and this one] do not consider if flink_fd is
> already set, thus as we dup we'll leak it.
> ---
> amdgpu/amdgpu_device.c | 43 ++-----------------------------------------
> 1 file changed, 2 insertions(+), 41 deletions(-)
>
> diff --git a/amdgpu/amdgpu_device.c b/amdgpu/amdgpu_device.c
> index f4ede031..6f04d936 100644
> --- a/amdgpu/amdgpu_device.c
> +++ b/amdgpu/amdgpu_device.c
> @@ -101,34 +101,6 @@ static int fd_compare(void *key1, void *key2)
> return result;
> }
>
> -/**
> -* Get the authenticated form fd,
> -*
> -* \param fd - \c [in] File descriptor for AMD GPU device
> -* \param auth - \c [out] Pointer to output the fd is authenticated or not
> -* A render node fd, output auth = 0
> -* A legacy fd, get the authenticated for compatibility root
> -*
> -* \return 0 on success\n
> -* >0 - AMD specific error code\n
> -* <0 - Negative POSIX Error code
> -*/
> -static int amdgpu_get_auth(int fd, int *auth)
> -{
> - int r = 0;
> - drm_client_t client = {};
> -
> - if (drmGetNodeTypeFromFd(fd) == DRM_NODE_RENDER)
> - *auth = 0;
> - else {
> - client.idx = 0;
> - r = drmIoctl(fd, DRM_IOCTL_GET_CLIENT, &client);
> - if (!r)
> - *auth = client.auth;
> - }
> - return r;
> -}
> -
> static void amdgpu_device_free_internal(amdgpu_device_handle dev)
> {
> amdgpu_vamgr_deinit(dev->vamgr);
> @@ -175,8 +147,6 @@ int amdgpu_device_initialize(int fd,
> struct amdgpu_device *dev;
> drmVersionPtr version;
> int r;
> - int flag_auth = 0;
> - int flag_authexist=0;
> uint32_t accel_working = 0;
> uint64_t start, max;
>
> @@ -185,19 +155,10 @@ int amdgpu_device_initialize(int fd,
> pthread_mutex_lock(&fd_mutex);
> if (!fd_tab)
> fd_tab = util_hash_table_create(fd_hash, fd_compare);
> - r = amdgpu_get_auth(fd, &flag_auth);
> - if (r) {
> - pthread_mutex_unlock(&fd_mutex);
> - return r;
> - }
> dev = util_hash_table_get(fd_tab, UINT_TO_PTR(fd));
> if (dev) {
> - r = amdgpu_get_auth(dev->fd, &flag_authexist);
> - if (r) {
> - pthread_mutex_unlock(&fd_mutex);
> - return r;
> - }
> - if ((flag_auth) && (!flag_authexist)) {
> + if (drmGetNodeTypeFromFd(fd) == DRM_NODE_RENDER &&
> + drmGetNodeTypeFromFd(dev->fd) == DRM_NODE_PRIMARY) {
> dev->flink_fd = dup(fd);
> }
> *major_version = dev->major_version;
> --
Seems like this and 1/3 has fallen through the cracks. Note that 2/3
is wrong, as pointed by Nicolai.
Can we get these moving in some shape or form - I have another ~20
patch series that builds on top ;-)
Thanks
Emil
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