| Message ID | 20230824092133.39510-3-benjamin.gaignard@collabora.com |
|---|---|
| State | New |
| Headers | show |
| Series | Add DELETE_BUF ioctl | expand |
Le 30/08/2023 à 15:23, Hans Verkuil a écrit : > On 24/08/2023 11:21, Benjamin Gaignard wrote: >> The first step before changing how vb2 buffers are stored into queue >> is to avoid direct access to bufs arrays. >> >> This patch adds 2 helpers functions to add and remove vb2 buffers >> from a queue. With these 2 and vb2_get_buffer(), bufs field of >> struct vb2_queue becomes like a private member of the structure. >> >> After each call to vb2_get_buffer() we need to be sure that we get >> a valid pointer so check the return value of all of them. >> >> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> >> >> # Conflicts: >> # drivers/media/common/videobuf2/videobuf2-core.c >> --- >> .../media/common/videobuf2/videobuf2-core.c | 203 ++++++++++++++---- >> .../media/common/videobuf2/videobuf2-v4l2.c | 28 ++- >> drivers/media/platform/amphion/vpu_dbg.c | 22 +- >> .../platform/mediatek/jpeg/mtk_jpeg_core.c | 6 +- >> .../vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 2 +- >> drivers/media/platform/st/sti/hva/hva-v4l2.c | 4 + >> drivers/media/test-drivers/visl/visl-dec.c | 28 ++- >> .../staging/media/atomisp/pci/atomisp_ioctl.c | 2 +- >> 8 files changed, 230 insertions(+), 65 deletions(-) >> >> diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c >> index e06905533ef4..8aa13591b782 100644 >> --- a/drivers/media/common/videobuf2/videobuf2-core.c >> +++ b/drivers/media/common/videobuf2/videobuf2-core.c >> @@ -403,6 +403,37 @@ static void init_buffer_cache_hints(struct vb2_queue *q, struct vb2_buffer *vb) >> vb->skip_cache_sync_on_finish = 1; >> } >> >> +/** >> + * vb2_queue_add_buffer() - add a buffer to a queue >> + * @q: pointer to &struct vb2_queue with videobuf2 queue. >> + * @vb: pointer to &struct vb2_buffer to be added to the queue. >> + * @index: index where add vb2_buffer in the queue >> + */ >> +static bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb, int index) >> +{ >> + if (index < VB2_MAX_FRAME && !q->bufs[index]) { >> + q->bufs[index] = vb; >> + vb->index = index; >> + vb->vb2_queue = q; >> + return true; >> + } >> + >> + return false; >> +} >> + >> +/** >> + * vb2_queue_remove_buffer() - remove a buffer from a queue >> + * @q: pointer to &struct vb2_queue with videobuf2 queue. >> + * @vb: pointer to &struct vb2_buffer to be removed from the queue. >> + */ >> +static void vb2_queue_remove_buffer(struct vb2_queue *q, struct vb2_buffer *vb) >> +{ >> + if (vb->index < VB2_MAX_FRAME) { >> + q->bufs[vb->index] = NULL; >> + vb->vb2_queue = NULL; >> + } >> +} >> + >> /* >> * __vb2_queue_alloc() - allocate vb2 buffer structures and (for MMAP type) >> * video buffer memory for all buffers/planes on the queue and initializes the >> @@ -431,9 +462,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, >> } >> >> vb->state = VB2_BUF_STATE_DEQUEUED; >> - vb->vb2_queue = q; >> vb->num_planes = num_planes; >> - vb->index = q->num_buffers + buffer; >> vb->type = q->type; >> vb->memory = memory; >> init_buffer_cache_hints(q, vb); >> @@ -443,7 +472,11 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, >> } >> call_void_bufop(q, init_buffer, vb); >> >> - q->bufs[vb->index] = vb; >> + if (!vb2_queue_add_buffer(q, vb, q->num_buffers + buffer)) { >> + dprintk(q, 1, "failed adding buffer %d to queue\n", buffer); >> + kfree(vb); >> + break; >> + } >> >> /* Allocate video buffer memory for the MMAP type */ >> if (memory == VB2_MEMORY_MMAP) { >> @@ -451,7 +484,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, >> if (ret) { >> dprintk(q, 1, "failed allocating memory for buffer %d\n", >> buffer); >> - q->bufs[vb->index] = NULL; >> + vb2_queue_remove_buffer(q, vb); >> kfree(vb); >> break; >> } >> @@ -466,7 +499,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, >> dprintk(q, 1, "buffer %d %p initialization failed\n", >> buffer, vb); >> __vb2_buf_mem_free(vb); >> - q->bufs[vb->index] = NULL; >> + vb2_queue_remove_buffer(q, vb); >> kfree(vb); >> break; >> } >> @@ -489,7 +522,7 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) >> >> for (buffer = q->num_buffers - buffers; buffer < q->num_buffers; >> ++buffer) { >> - vb = q->bufs[buffer]; >> + vb = vb2_get_buffer(q, buffer); >> if (!vb) >> continue; >> >> @@ -517,7 +550,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) >> /* Call driver-provided cleanup function for each buffer, if provided */ >> for (buffer = q->num_buffers - buffers; buffer < q->num_buffers; >> ++buffer) { >> - struct vb2_buffer *vb = q->bufs[buffer]; >> + struct vb2_buffer *vb = vb2_get_buffer(q, buffer); >> >> if (vb && vb->planes[0].mem_priv) >> call_void_vb_qop(vb, buf_cleanup, vb); >> @@ -557,15 +590,20 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) >> q->cnt_unprepare_streaming = 0; >> } >> for (buffer = 0; buffer < q->num_buffers; ++buffer) { >> - struct vb2_buffer *vb = q->bufs[buffer]; >> - bool unbalanced = vb->cnt_mem_alloc != vb->cnt_mem_put || >> - vb->cnt_mem_prepare != vb->cnt_mem_finish || >> - vb->cnt_mem_get_userptr != vb->cnt_mem_put_userptr || >> - vb->cnt_mem_attach_dmabuf != vb->cnt_mem_detach_dmabuf || >> - vb->cnt_mem_map_dmabuf != vb->cnt_mem_unmap_dmabuf || >> - vb->cnt_buf_queue != vb->cnt_buf_done || >> - vb->cnt_buf_prepare != vb->cnt_buf_finish || >> - vb->cnt_buf_init != vb->cnt_buf_cleanup; >> + struct vb2_buffer *vb = vb2_get_buffer(q, buffer); >> + bool unbalanced; >> + >> + if (!vb) >> + continue; >> + >> + unbalanced = vb->cnt_mem_alloc != vb->cnt_mem_put || >> + vb->cnt_mem_prepare != vb->cnt_mem_finish || >> + vb->cnt_mem_get_userptr != vb->cnt_mem_put_userptr || >> + vb->cnt_mem_attach_dmabuf != vb->cnt_mem_detach_dmabuf || >> + vb->cnt_mem_map_dmabuf != vb->cnt_mem_unmap_dmabuf || >> + vb->cnt_buf_queue != vb->cnt_buf_done || >> + vb->cnt_buf_prepare != vb->cnt_buf_finish || >> + vb->cnt_buf_init != vb->cnt_buf_cleanup; >> >> if (unbalanced || debug) { > I think we should drop the '|| debug' part. It is already annoying today to see these > messages when the debug parameter is > 0, and now the number of buffers is still > fairly small. But if we allow a lot more buffers, then this will really spam the > kernel log. > > I think this should be dropped, and we only report unbalanced buffers. > > And another optimization is to only report the unbalanced counters. Right now > it reports all counters, but it is again too much spamming of the kernel log. > > I think this change can be done as a separate patch before this patch. > That way it can be picked up separately from the other changes in this series. > >> pr_info(" counters for queue %p, buffer %d:%s\n", >> @@ -597,8 +635,13 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) >> /* Free vb2 buffers */ >> for (buffer = q->num_buffers - buffers; buffer < q->num_buffers; >> ++buffer) { >> - kfree(q->bufs[buffer]); >> - q->bufs[buffer] = NULL; >> + struct vb2_buffer *vb = vb2_get_buffer(q, buffer); >> + >> + if (!vb) >> + continue; >> + >> + vb2_queue_remove_buffer(q, vb); >> + kfree(vb); >> } >> >> q->num_buffers -= buffers; >> @@ -634,7 +677,12 @@ static bool __buffers_in_use(struct vb2_queue *q) >> { >> unsigned int buffer; >> for (buffer = 0; buffer < q->num_buffers; ++buffer) { >> - if (vb2_buffer_in_use(q, q->bufs[buffer])) >> + struct vb2_buffer *vb = vb2_get_buffer(q, buffer); >> + >> + if (!vb) >> + continue; >> + >> + if (vb2_buffer_in_use(q, vb)) >> return true; >> } >> return false; >> @@ -642,7 +690,10 @@ static bool __buffers_in_use(struct vb2_queue *q) >> >> void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb) >> { >> - call_void_bufop(q, fill_user_buffer, q->bufs[index], pb); >> + struct vb2_buffer *vb = vb2_get_buffer(q, index); >> + >> + if (vb) >> + call_void_bufop(q, fill_user_buffer, vb, pb); > I think that rather than passing the index (that then has to be verified) > it is better to pass the vb2_buffer pointer directly and leave it up to > the caller to do the index verification. That will be be in v6 > > Another option is to drop this function altogether and let the called > call the fill_user_buffer function. Either works for me. > >> } >> EXPORT_SYMBOL_GPL(vb2_core_querybuf); >> >> @@ -1553,7 +1604,13 @@ int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb) > Here too it is better to pass the vb2_buffer pointer instead of an index. > > This function assumes that the index is valid, so the called actually does the > validation. Passing the vb pointer instead of the index makes more sense > in this new situation. > > This is also true for two other core functions: vb2_core_qbuf and vb2_core_expbuf. > >> struct vb2_buffer *vb; >> int ret; >> >> - vb = q->bufs[index]; >> + vb = vb2_get_buffer(q, index); >> + >> + if (!vb) { >> + dprintk(q, 1, "can't find the requested buffer\n"); >> + return -EINVAL; >> + } > Changing that avoids having to add this check, so it simplifies the code. > > I think that this change can be done in a separate patch before this one. > > It makes sense to apply that regardless of the remainder of this series. > >> + >> if (vb->state != VB2_BUF_STATE_DEQUEUED) { >> dprintk(q, 1, "invalid buffer state %s\n", >> vb2_state_name(vb->state)); >> @@ -1624,7 +1681,11 @@ static int vb2_start_streaming(struct vb2_queue *q) >> * correctly return them to vb2. >> */ >> for (i = 0; i < q->num_buffers; ++i) { >> - vb = q->bufs[i]; >> + vb = vb2_get_buffer(q, i); >> + >> + if (!vb) >> + continue; >> + >> if (vb->state == VB2_BUF_STATE_ACTIVE) >> vb2_buffer_done(vb, VB2_BUF_STATE_QUEUED); >> } >> @@ -1652,7 +1713,12 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb, >> return -EIO; >> } >> >> - vb = q->bufs[index]; >> + vb = vb2_get_buffer(q, index); >> + >> + if (!vb) { >> + dprintk(q, 1, "can't find the requested buffer\n"); >> + return -EINVAL; >> + } >> >> if (!req && vb->state != VB2_BUF_STATE_IN_REQUEST && >> q->requires_requests) { >> @@ -2028,12 +2094,18 @@ static void __vb2_queue_cancel(struct vb2_queue *q) >> * to vb2 in stop_streaming(). >> */ >> if (WARN_ON(atomic_read(&q->owned_by_drv_count))) { >> - for (i = 0; i < q->num_buffers; ++i) >> - if (q->bufs[i]->state == VB2_BUF_STATE_ACTIVE) { >> + for (i = 0; i < q->num_buffers; ++i) { >> + struct vb2_buffer *vb = vb2_get_buffer(q, i); >> + >> + if (!vb) >> + continue; >> + >> + if (vb->state == VB2_BUF_STATE_ACTIVE) { >> pr_warn("driver bug: stop_streaming operation is leaving buf %p in active state\n", >> - q->bufs[i]); >> - vb2_buffer_done(q->bufs[i], VB2_BUF_STATE_ERROR); >> + vb); >> + vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); >> } >> + } >> /* Must be zero now */ >> WARN_ON(atomic_read(&q->owned_by_drv_count)); >> } >> @@ -2067,9 +2139,14 @@ static void __vb2_queue_cancel(struct vb2_queue *q) >> * be changed, so we can't move the buf_finish() to __vb2_dqbuf(). >> */ >> for (i = 0; i < q->num_buffers; ++i) { >> - struct vb2_buffer *vb = q->bufs[i]; >> - struct media_request *req = vb->req_obj.req; >> + struct vb2_buffer *vb; >> + struct media_request *req; >> + >> + vb = vb2_get_buffer(q, i); >> + if (!vb) >> + continue; >> >> + req = vb->req_obj.req; >> /* >> * If a request is associated with this buffer, then >> * call buf_request_cancel() to give the driver to complete() >> @@ -2219,7 +2296,10 @@ static int __find_plane_by_offset(struct vb2_queue *q, unsigned long off, >> buffer = (off >> (PLANE_INDEX_SHIFT + PAGE_SHIFT)) & MAX_BUFFERS; >> plane = (off >> PAGE_SHIFT) & PLANE_INDEX_MASK; >> >> - vb = q->bufs[buffer]; >> + vb = vb2_get_buffer(q, buffer); >> + if (!vb) >> + return -EINVAL; >> + >> if (vb->planes[plane].m.offset == off) { >> *_buffer = buffer; >> *_plane = plane; >> @@ -2262,7 +2342,12 @@ int vb2_core_expbuf(struct vb2_queue *q, int *fd, unsigned int type, >> return -EINVAL; >> } >> >> - vb = q->bufs[index]; >> + vb = vb2_get_buffer(q, index); >> + >> + if (!vb) { >> + dprintk(q, 1, "can't find the requested buffer\n"); >> + return -EINVAL; >> + } >> >> if (plane >= vb->num_planes) { >> dprintk(q, 1, "buffer plane out of range\n"); >> @@ -2339,7 +2424,13 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma) >> if (ret) >> goto unlock; >> >> - vb = q->bufs[buffer]; >> + vb = vb2_get_buffer(q, buffer); >> + >> + if (!vb) { >> + dprintk(q, 1, "can't find the requested buffer\n"); >> + ret = -EINVAL; >> + goto unlock; >> + } >> >> /* >> * MMAP requires page_aligned buffers. >> @@ -2396,7 +2487,12 @@ unsigned long vb2_get_unmapped_area(struct vb2_queue *q, >> if (ret) >> goto unlock; >> >> - vb = q->bufs[buffer]; >> + vb = vb2_get_buffer(q, buffer); >> + if (!vb) { >> + dprintk(q, 1, "can't find the requested buffer\n"); >> + ret = -EINVAL; >> + goto unlock; >> + } >> >> vaddr = vb2_plane_vaddr(vb, plane); >> mutex_unlock(&q->mmap_lock); >> @@ -2625,6 +2721,7 @@ struct vb2_fileio_data { >> static int __vb2_init_fileio(struct vb2_queue *q, int read) >> { >> struct vb2_fileio_data *fileio; >> + struct vb2_buffer *vb; >> int i, ret; >> unsigned int count = 0; >> >> @@ -2679,7 +2776,13 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) >> * Check if plane_count is correct >> * (multiplane buffers are not supported). >> */ >> - if (q->bufs[0]->num_planes != 1) { >> + vb = vb2_get_buffer(q, 0); >> + if (!vb) { >> + ret = -EBUSY; >> + goto err_reqbufs; >> + } > This cannot happen. These fileio helper functions implement the read() support > and all the buffer allocation happens here. Userspace can never add or delete > buffers later, so there will never be holes. It is safe to assume that > vb2_get_buffer(q, i) will always return a valid vb pointer for i in the range > of 0 - q->num_buffers-1. > > Perhaps add a comment to that effect, but otherwise you can drop the checks. I will reuse your words and put that in v6 > >> + >> + if (vb->num_planes != 1) { >> ret = -EBUSY; >> goto err_reqbufs; >> } >> @@ -2688,12 +2791,17 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) >> * Get kernel address of each buffer. >> */ >> for (i = 0; i < q->num_buffers; i++) { >> - fileio->bufs[i].vaddr = vb2_plane_vaddr(q->bufs[i], 0); >> + vb = vb2_get_buffer(q, i); >> + >> + if (!vb) >> + continue; >> + >> + fileio->bufs[i].vaddr = vb2_plane_vaddr(vb, 0); >> if (fileio->bufs[i].vaddr == NULL) { >> ret = -EINVAL; >> goto err_reqbufs; >> } >> - fileio->bufs[i].size = vb2_plane_size(q->bufs[i], 0); >> + fileio->bufs[i].size = vb2_plane_size(vb, 0); >> } >> >> /* >> @@ -2821,15 +2929,18 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ >> >> fileio->cur_index = index; >> buf = &fileio->bufs[index]; >> - b = q->bufs[index]; >> + b = vb2_get_buffer(q, index); >> + >> + if (!b) >> + return -EINVAL; >> >> /* >> * Get number of bytes filled by the driver >> */ >> buf->pos = 0; >> buf->queued = 0; >> - buf->size = read ? vb2_get_plane_payload(q->bufs[index], 0) >> - : vb2_plane_size(q->bufs[index], 0); >> + buf->size = read ? vb2_get_plane_payload(b, 0) >> + : vb2_plane_size(b, 0); >> /* Compensate for data_offset on read in the multiplanar case. */ >> if (is_multiplanar && read && >> b->planes[0].data_offset < buf->size) { >> @@ -2872,8 +2983,12 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ >> * Queue next buffer if required. >> */ >> if (buf->pos == buf->size || (!read && fileio->write_immediately)) { >> - struct vb2_buffer *b = q->bufs[index]; >> + struct vb2_buffer *b = vb2_get_buffer(q, index); >> >> + if (!b) { >> + dprintk(q, 1, "can't find the requested buffer\n"); >> + return -EINVAL; >> + } >> /* >> * Check if this is the last buffer to read. >> */ >> @@ -2899,7 +3014,7 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ >> */ >> buf->pos = 0; >> buf->queued = 1; >> - buf->size = vb2_plane_size(q->bufs[index], 0); >> + buf->size = vb2_plane_size(b, 0); >> fileio->q_count += 1; >> /* >> * If we are queuing up buffers for the first time, then >> @@ -2970,7 +3085,9 @@ static int vb2_thread(void *data) >> * Call vb2_dqbuf to get buffer back. >> */ >> if (prequeue) { >> - vb = q->bufs[index++]; >> + vb = vb2_get_buffer(q, index++); >> + if (!vb) >> + continue; >> prequeue--; >> } else { >> call_void_qop(q, wait_finish, q); >> @@ -2979,7 +3096,7 @@ static int vb2_thread(void *data) >> call_void_qop(q, wait_prepare, q); >> dprintk(q, 5, "file io: vb2_dqbuf result: %d\n", ret); >> if (!ret) >> - vb = q->bufs[index]; >> + vb = vb2_get_buffer(q, index); >> } >> if (ret || threadio->stop) >> break; >> diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c >> index c7a54d82a55e..724135d41f7f 100644 >> --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c >> +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c >> @@ -383,8 +383,7 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *md >> return -EINVAL; >> } >> >> - if (q->bufs[b->index] == NULL) { >> - /* Should never happen */ >> + if (!vb2_get_buffer(q, b->index)) { >> dprintk(q, 1, "%s: buffer is NULL\n", opname); > How about: > > dprintk(q, 1, "%s: buffer %u was deleted\n", opname, b->index); > > although perhaps that change is more appropriate in patch 09/10? > > Regardless, once it is possible to delete buffers, then this message should be > adjusted accordingly. I will update the same in the patch introducing DELETE_BUFS > >> return -EINVAL; >> } >> @@ -394,7 +393,7 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *md >> return -EINVAL; >> } >> >> - vb = q->bufs[b->index]; >> + vb = vb2_get_buffer(q, b->index); > This can be moved up to the 'if (!vb2_get_buffer(q, b->index)) {' check above. > That avoids calling vb2_get_buffer twice. ok > >> vbuf = to_vb2_v4l2_buffer(vb); >> ret = __verify_planes_array(vb, b); >> if (ret) >> @@ -628,11 +627,18 @@ static const struct vb2_buf_ops v4l2_buf_ops = { >> struct vb2_buffer *vb2_find_buffer(struct vb2_queue *q, u64 timestamp) >> { >> unsigned int i; >> + struct vb2_buffer *vb2; >> >> - for (i = 0; i < q->num_buffers; i++) >> - if (q->bufs[i]->copied_timestamp && >> - q->bufs[i]->timestamp == timestamp) >> - return vb2_get_buffer(q, i); > Perhaps add a comment here that this loop doesn't scale if there > is a really large number of buffers and something more efficient > will have to be found in that case. You will have it in v6 > >> + for (i = 0; i < q->num_buffers; i++) { >> + vb2 = vb2_get_buffer(q, i); >> + >> + if (!vb2) >> + continue; >> + >> + if (vb2->copied_timestamp && >> + vb2->timestamp == timestamp) >> + return vb2; >> + } >> return NULL; >> } >> EXPORT_SYMBOL_GPL(vb2_find_buffer); >> @@ -664,7 +670,13 @@ int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b) >> dprintk(q, 1, "buffer index out of range\n"); >> return -EINVAL; >> } >> - vb = q->bufs[b->index]; >> + vb = vb2_get_buffer(q, b->index); >> + >> + if (!vb) { >> + dprintk(q, 1, "can't find the requested buffer\n"); >> + return -EINVAL; >> + } >> + >> ret = __verify_planes_array(vb, b); >> if (!ret) >> vb2_core_querybuf(q, b->index, b); >> diff --git a/drivers/media/platform/amphion/vpu_dbg.c b/drivers/media/platform/amphion/vpu_dbg.c >> index 982c2c777484..a462d6fe4ea9 100644 >> --- a/drivers/media/platform/amphion/vpu_dbg.c >> +++ b/drivers/media/platform/amphion/vpu_dbg.c >> @@ -140,11 +140,18 @@ static int vpu_dbg_instance(struct seq_file *s, void *data) >> >> vq = v4l2_m2m_get_src_vq(inst->fh.m2m_ctx); >> for (i = 0; i < vq->num_buffers; i++) { >> - struct vb2_buffer *vb = vq->bufs[i]; >> - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); >> + struct vb2_buffer *vb; >> + struct vb2_v4l2_buffer *vbuf; >> + >> + vb = vb2_get_buffer(vq, i); >> + if (!vb) >> + continue; >> >> if (vb->state == VB2_BUF_STATE_DEQUEUED) >> continue; >> + >> + vbuf = to_vb2_v4l2_buffer(vb); >> + >> num = scnprintf(str, sizeof(str), >> "output [%2d] state = %10s, %8s\n", >> i, vb2_stat_name[vb->state], >> @@ -155,11 +162,18 @@ static int vpu_dbg_instance(struct seq_file *s, void *data) >> >> vq = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx); >> for (i = 0; i < vq->num_buffers; i++) { >> - struct vb2_buffer *vb = vq->bufs[i]; >> - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); >> + struct vb2_buffer *vb; >> + struct vb2_v4l2_buffer *vbuf; >> + >> + vb = vb2_get_buffer(vq, i); >> + if (!vb) >> + continue; >> >> if (vb->state == VB2_BUF_STATE_DEQUEUED) >> continue; >> + >> + vbuf = to_vb2_v4l2_buffer(vb); >> + >> num = scnprintf(str, sizeof(str), >> "capture[%2d] state = %10s, %8s\n", >> i, vb2_stat_name[vb->state], > This can be a separate patch, right? It doesn't depend on any core changes. > > And this can also be applied before this patch. > >> diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c >> index 621038aab116..62910a1b8a98 100644 >> --- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c >> +++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c >> @@ -603,7 +603,11 @@ static int mtk_jpeg_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) >> return -EINVAL; >> } >> >> - vb = vq->bufs[buf->index]; >> + vb = vb2_get_buffer(vq, buf->index); >> + if (!vb) { >> + dev_err(ctx->jpeg->dev, "buffer not found\n"); >> + return -EINVAL; >> + } >> jpeg_src_buf = mtk_jpeg_vb2_to_srcbuf(vb); >> jpeg_src_buf->bs_size = buf->m.planes[0].bytesused; >> > Ditto. > >> diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c >> index e393e3e668f8..3d2ae0e1b5b6 100644 >> --- a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c >> +++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c >> @@ -1696,7 +1696,7 @@ static int vdec_vp9_slice_setup_core_buffer(struct vdec_vp9_slice_instance *inst >> >> /* update internal buffer's width/height */ >> for (i = 0; i < vq->num_buffers; i++) { >> - if (vb == vq->bufs[i]) { >> + if (vb == vb2_get_buffer(vq, i)) { >> instance->dpb[i].width = w; >> instance->dpb[i].height = h; >> break; > Ditto. > >> diff --git a/drivers/media/platform/st/sti/hva/hva-v4l2.c b/drivers/media/platform/st/sti/hva/hva-v4l2.c >> index 3a848ca32a0e..326be09bdb55 100644 >> --- a/drivers/media/platform/st/sti/hva/hva-v4l2.c >> +++ b/drivers/media/platform/st/sti/hva/hva-v4l2.c >> @@ -577,6 +577,10 @@ static int hva_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) >> } >> >> vb2_buf = vb2_get_buffer(vq, buf->index); >> + if (!vb2_buf) { >> + dev_dbg(dev, "%s buffer index %d not found\n", ctx->name, buf->index); >> + return -EINVAL; >> + } >> stream = to_hva_stream(to_vb2_v4l2_buffer(vb2_buf)); >> stream->bytesused = buf->bytesused; >> } > Ditto. > >> diff --git a/drivers/media/test-drivers/visl/visl-dec.c b/drivers/media/test-drivers/visl/visl-dec.c >> index 318d675e5668..ba20ea998d19 100644 >> --- a/drivers/media/test-drivers/visl/visl-dec.c >> +++ b/drivers/media/test-drivers/visl/visl-dec.c >> @@ -290,13 +290,20 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run) >> for (i = 0; i < out_q->num_buffers; i++) { >> char entry[] = "index: %u, state: %s, request_fd: %d, "; >> u32 old_len = len; >> - char *q_status = visl_get_vb2_state(out_q->bufs[i]->state); >> + struct vb2_buffer *vb2; >> + char *q_status; >> + >> + vb2 = vb2_get_buffer(out_q, i); >> + if (!vb2) >> + continue; >> + >> + q_status = visl_get_vb2_state(vb2->state); >> >> len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len, >> entry, i, q_status, >> - to_vb2_v4l2_buffer(out_q->bufs[i])->request_fd); >> + to_vb2_v4l2_buffer(vb2)->request_fd); >> >> - len += visl_fill_bytesused(to_vb2_v4l2_buffer(out_q->bufs[i]), >> + len += visl_fill_bytesused(to_vb2_v4l2_buffer(vb2), >> &buf[len], >> TPG_STR_BUF_SZ - len); >> >> @@ -342,13 +349,20 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run) >> len = 0; >> for (i = 0; i < cap_q->num_buffers; i++) { >> u32 old_len = len; >> - char *q_status = visl_get_vb2_state(cap_q->bufs[i]->state); >> + struct vb2_buffer *vb2; >> + char *q_status; >> + >> + vb2 = vb2_get_buffer(cap_q, i); >> + if (!vb2) >> + continue; >> + >> + q_status = visl_get_vb2_state(vb2->state); >> >> len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len, >> "index: %u, status: %s, timestamp: %llu, is_held: %d", >> - cap_q->bufs[i]->index, q_status, >> - cap_q->bufs[i]->timestamp, >> - to_vb2_v4l2_buffer(cap_q->bufs[i])->is_held); >> + vb2->index, q_status, >> + vb2->timestamp, >> + to_vb2_v4l2_buffer(vb2)->is_held); >> >> tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, &buf[old_len]); >> frame_dprintk(ctx->dev, run->dst->sequence, "%s", &buf[old_len]); > Ditto. > >> diff --git a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c >> index d2174156573a..4b65c69fa60d 100644 >> --- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c >> +++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c >> @@ -1061,7 +1061,7 @@ static int atomisp_dqbuf_wrapper(struct file *file, void *fh, struct v4l2_buffer >> if (ret) >> return ret; >> >> - vb = pipe->vb_queue.bufs[buf->index]; >> + vb = vb2_get_buffer(&pipe->vb_queue, buf->index); >> frame = vb_to_frame(vb); >> >> buf->reserved = asd->frame_status[buf->index]; > Ditto. > > Background: I think it is really useful to merge a lot of the groundwork early > on, where possible. It simplifies the remainder of the patch series. > > Regards, > > Hans >
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index e06905533ef4..8aa13591b782 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -403,6 +403,37 @@ static void init_buffer_cache_hints(struct vb2_queue *q, struct vb2_buffer *vb) vb->skip_cache_sync_on_finish = 1; } +/** + * vb2_queue_add_buffer() - add a buffer to a queue + * @q: pointer to &struct vb2_queue with videobuf2 queue. + * @vb: pointer to &struct vb2_buffer to be added to the queue. + * @index: index where add vb2_buffer in the queue + */ +static bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb, int index) +{ + if (index < VB2_MAX_FRAME && !q->bufs[index]) { + q->bufs[index] = vb; + vb->index = index; + vb->vb2_queue = q; + return true; + } + + return false; +} + +/** + * vb2_queue_remove_buffer() - remove a buffer from a queue + * @q: pointer to &struct vb2_queue with videobuf2 queue. + * @vb: pointer to &struct vb2_buffer to be removed from the queue. + */ +static void vb2_queue_remove_buffer(struct vb2_queue *q, struct vb2_buffer *vb) +{ + if (vb->index < VB2_MAX_FRAME) { + q->bufs[vb->index] = NULL; + vb->vb2_queue = NULL; + } +} + /* * __vb2_queue_alloc() - allocate vb2 buffer structures and (for MMAP type) * video buffer memory for all buffers/planes on the queue and initializes the @@ -431,9 +462,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, } vb->state = VB2_BUF_STATE_DEQUEUED; - vb->vb2_queue = q; vb->num_planes = num_planes; - vb->index = q->num_buffers + buffer; vb->type = q->type; vb->memory = memory; init_buffer_cache_hints(q, vb); @@ -443,7 +472,11 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, } call_void_bufop(q, init_buffer, vb); - q->bufs[vb->index] = vb; + if (!vb2_queue_add_buffer(q, vb, q->num_buffers + buffer)) { + dprintk(q, 1, "failed adding buffer %d to queue\n", buffer); + kfree(vb); + break; + } /* Allocate video buffer memory for the MMAP type */ if (memory == VB2_MEMORY_MMAP) { @@ -451,7 +484,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, if (ret) { dprintk(q, 1, "failed allocating memory for buffer %d\n", buffer); - q->bufs[vb->index] = NULL; + vb2_queue_remove_buffer(q, vb); kfree(vb); break; } @@ -466,7 +499,7 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, dprintk(q, 1, "buffer %d %p initialization failed\n", buffer, vb); __vb2_buf_mem_free(vb); - q->bufs[vb->index] = NULL; + vb2_queue_remove_buffer(q, vb); kfree(vb); break; } @@ -489,7 +522,7 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) for (buffer = q->num_buffers - buffers; buffer < q->num_buffers; ++buffer) { - vb = q->bufs[buffer]; + vb = vb2_get_buffer(q, buffer); if (!vb) continue; @@ -517,7 +550,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) /* Call driver-provided cleanup function for each buffer, if provided */ for (buffer = q->num_buffers - buffers; buffer < q->num_buffers; ++buffer) { - struct vb2_buffer *vb = q->bufs[buffer]; + struct vb2_buffer *vb = vb2_get_buffer(q, buffer); if (vb && vb->planes[0].mem_priv) call_void_vb_qop(vb, buf_cleanup, vb); @@ -557,15 +590,20 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) q->cnt_unprepare_streaming = 0; } for (buffer = 0; buffer < q->num_buffers; ++buffer) { - struct vb2_buffer *vb = q->bufs[buffer]; - bool unbalanced = vb->cnt_mem_alloc != vb->cnt_mem_put || - vb->cnt_mem_prepare != vb->cnt_mem_finish || - vb->cnt_mem_get_userptr != vb->cnt_mem_put_userptr || - vb->cnt_mem_attach_dmabuf != vb->cnt_mem_detach_dmabuf || - vb->cnt_mem_map_dmabuf != vb->cnt_mem_unmap_dmabuf || - vb->cnt_buf_queue != vb->cnt_buf_done || - vb->cnt_buf_prepare != vb->cnt_buf_finish || - vb->cnt_buf_init != vb->cnt_buf_cleanup; + struct vb2_buffer *vb = vb2_get_buffer(q, buffer); + bool unbalanced; + + if (!vb) + continue; + + unbalanced = vb->cnt_mem_alloc != vb->cnt_mem_put || + vb->cnt_mem_prepare != vb->cnt_mem_finish || + vb->cnt_mem_get_userptr != vb->cnt_mem_put_userptr || + vb->cnt_mem_attach_dmabuf != vb->cnt_mem_detach_dmabuf || + vb->cnt_mem_map_dmabuf != vb->cnt_mem_unmap_dmabuf || + vb->cnt_buf_queue != vb->cnt_buf_done || + vb->cnt_buf_prepare != vb->cnt_buf_finish || + vb->cnt_buf_init != vb->cnt_buf_cleanup; if (unbalanced || debug) { pr_info(" counters for queue %p, buffer %d:%s\n", @@ -597,8 +635,13 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) /* Free vb2 buffers */ for (buffer = q->num_buffers - buffers; buffer < q->num_buffers; ++buffer) { - kfree(q->bufs[buffer]); - q->bufs[buffer] = NULL; + struct vb2_buffer *vb = vb2_get_buffer(q, buffer); + + if (!vb) + continue; + + vb2_queue_remove_buffer(q, vb); + kfree(vb); } q->num_buffers -= buffers; @@ -634,7 +677,12 @@ static bool __buffers_in_use(struct vb2_queue *q) { unsigned int buffer; for (buffer = 0; buffer < q->num_buffers; ++buffer) { - if (vb2_buffer_in_use(q, q->bufs[buffer])) + struct vb2_buffer *vb = vb2_get_buffer(q, buffer); + + if (!vb) + continue; + + if (vb2_buffer_in_use(q, vb)) return true; } return false; @@ -642,7 +690,10 @@ static bool __buffers_in_use(struct vb2_queue *q) void vb2_core_querybuf(struct vb2_queue *q, unsigned int index, void *pb) { - call_void_bufop(q, fill_user_buffer, q->bufs[index], pb); + struct vb2_buffer *vb = vb2_get_buffer(q, index); + + if (vb) + call_void_bufop(q, fill_user_buffer, vb, pb); } EXPORT_SYMBOL_GPL(vb2_core_querybuf); @@ -1553,7 +1604,13 @@ int vb2_core_prepare_buf(struct vb2_queue *q, unsigned int index, void *pb) struct vb2_buffer *vb; int ret; - vb = q->bufs[index]; + vb = vb2_get_buffer(q, index); + + if (!vb) { + dprintk(q, 1, "can't find the requested buffer\n"); + return -EINVAL; + } + if (vb->state != VB2_BUF_STATE_DEQUEUED) { dprintk(q, 1, "invalid buffer state %s\n", vb2_state_name(vb->state)); @@ -1624,7 +1681,11 @@ static int vb2_start_streaming(struct vb2_queue *q) * correctly return them to vb2. */ for (i = 0; i < q->num_buffers; ++i) { - vb = q->bufs[i]; + vb = vb2_get_buffer(q, i); + + if (!vb) + continue; + if (vb->state == VB2_BUF_STATE_ACTIVE) vb2_buffer_done(vb, VB2_BUF_STATE_QUEUED); } @@ -1652,7 +1713,12 @@ int vb2_core_qbuf(struct vb2_queue *q, unsigned int index, void *pb, return -EIO; } - vb = q->bufs[index]; + vb = vb2_get_buffer(q, index); + + if (!vb) { + dprintk(q, 1, "can't find the requested buffer\n"); + return -EINVAL; + } if (!req && vb->state != VB2_BUF_STATE_IN_REQUEST && q->requires_requests) { @@ -2028,12 +2094,18 @@ static void __vb2_queue_cancel(struct vb2_queue *q) * to vb2 in stop_streaming(). */ if (WARN_ON(atomic_read(&q->owned_by_drv_count))) { - for (i = 0; i < q->num_buffers; ++i) - if (q->bufs[i]->state == VB2_BUF_STATE_ACTIVE) { + for (i = 0; i < q->num_buffers; ++i) { + struct vb2_buffer *vb = vb2_get_buffer(q, i); + + if (!vb) + continue; + + if (vb->state == VB2_BUF_STATE_ACTIVE) { pr_warn("driver bug: stop_streaming operation is leaving buf %p in active state\n", - q->bufs[i]); - vb2_buffer_done(q->bufs[i], VB2_BUF_STATE_ERROR); + vb); + vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); } + } /* Must be zero now */ WARN_ON(atomic_read(&q->owned_by_drv_count)); } @@ -2067,9 +2139,14 @@ static void __vb2_queue_cancel(struct vb2_queue *q) * be changed, so we can't move the buf_finish() to __vb2_dqbuf(). */ for (i = 0; i < q->num_buffers; ++i) { - struct vb2_buffer *vb = q->bufs[i]; - struct media_request *req = vb->req_obj.req; + struct vb2_buffer *vb; + struct media_request *req; + + vb = vb2_get_buffer(q, i); + if (!vb) + continue; + req = vb->req_obj.req; /* * If a request is associated with this buffer, then * call buf_request_cancel() to give the driver to complete() @@ -2219,7 +2296,10 @@ static int __find_plane_by_offset(struct vb2_queue *q, unsigned long off, buffer = (off >> (PLANE_INDEX_SHIFT + PAGE_SHIFT)) & MAX_BUFFERS; plane = (off >> PAGE_SHIFT) & PLANE_INDEX_MASK; - vb = q->bufs[buffer]; + vb = vb2_get_buffer(q, buffer); + if (!vb) + return -EINVAL; + if (vb->planes[plane].m.offset == off) { *_buffer = buffer; *_plane = plane; @@ -2262,7 +2342,12 @@ int vb2_core_expbuf(struct vb2_queue *q, int *fd, unsigned int type, return -EINVAL; } - vb = q->bufs[index]; + vb = vb2_get_buffer(q, index); + + if (!vb) { + dprintk(q, 1, "can't find the requested buffer\n"); + return -EINVAL; + } if (plane >= vb->num_planes) { dprintk(q, 1, "buffer plane out of range\n"); @@ -2339,7 +2424,13 @@ int vb2_mmap(struct vb2_queue *q, struct vm_area_struct *vma) if (ret) goto unlock; - vb = q->bufs[buffer]; + vb = vb2_get_buffer(q, buffer); + + if (!vb) { + dprintk(q, 1, "can't find the requested buffer\n"); + ret = -EINVAL; + goto unlock; + } /* * MMAP requires page_aligned buffers. @@ -2396,7 +2487,12 @@ unsigned long vb2_get_unmapped_area(struct vb2_queue *q, if (ret) goto unlock; - vb = q->bufs[buffer]; + vb = vb2_get_buffer(q, buffer); + if (!vb) { + dprintk(q, 1, "can't find the requested buffer\n"); + ret = -EINVAL; + goto unlock; + } vaddr = vb2_plane_vaddr(vb, plane); mutex_unlock(&q->mmap_lock); @@ -2625,6 +2721,7 @@ struct vb2_fileio_data { static int __vb2_init_fileio(struct vb2_queue *q, int read) { struct vb2_fileio_data *fileio; + struct vb2_buffer *vb; int i, ret; unsigned int count = 0; @@ -2679,7 +2776,13 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) * Check if plane_count is correct * (multiplane buffers are not supported). */ - if (q->bufs[0]->num_planes != 1) { + vb = vb2_get_buffer(q, 0); + if (!vb) { + ret = -EBUSY; + goto err_reqbufs; + } + + if (vb->num_planes != 1) { ret = -EBUSY; goto err_reqbufs; } @@ -2688,12 +2791,17 @@ static int __vb2_init_fileio(struct vb2_queue *q, int read) * Get kernel address of each buffer. */ for (i = 0; i < q->num_buffers; i++) { - fileio->bufs[i].vaddr = vb2_plane_vaddr(q->bufs[i], 0); + vb = vb2_get_buffer(q, i); + + if (!vb) + continue; + + fileio->bufs[i].vaddr = vb2_plane_vaddr(vb, 0); if (fileio->bufs[i].vaddr == NULL) { ret = -EINVAL; goto err_reqbufs; } - fileio->bufs[i].size = vb2_plane_size(q->bufs[i], 0); + fileio->bufs[i].size = vb2_plane_size(vb, 0); } /* @@ -2821,15 +2929,18 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ fileio->cur_index = index; buf = &fileio->bufs[index]; - b = q->bufs[index]; + b = vb2_get_buffer(q, index); + + if (!b) + return -EINVAL; /* * Get number of bytes filled by the driver */ buf->pos = 0; buf->queued = 0; - buf->size = read ? vb2_get_plane_payload(q->bufs[index], 0) - : vb2_plane_size(q->bufs[index], 0); + buf->size = read ? vb2_get_plane_payload(b, 0) + : vb2_plane_size(b, 0); /* Compensate for data_offset on read in the multiplanar case. */ if (is_multiplanar && read && b->planes[0].data_offset < buf->size) { @@ -2872,8 +2983,12 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ * Queue next buffer if required. */ if (buf->pos == buf->size || (!read && fileio->write_immediately)) { - struct vb2_buffer *b = q->bufs[index]; + struct vb2_buffer *b = vb2_get_buffer(q, index); + if (!b) { + dprintk(q, 1, "can't find the requested buffer\n"); + return -EINVAL; + } /* * Check if this is the last buffer to read. */ @@ -2899,7 +3014,7 @@ static size_t __vb2_perform_fileio(struct vb2_queue *q, char __user *data, size_ */ buf->pos = 0; buf->queued = 1; - buf->size = vb2_plane_size(q->bufs[index], 0); + buf->size = vb2_plane_size(b, 0); fileio->q_count += 1; /* * If we are queuing up buffers for the first time, then @@ -2970,7 +3085,9 @@ static int vb2_thread(void *data) * Call vb2_dqbuf to get buffer back. */ if (prequeue) { - vb = q->bufs[index++]; + vb = vb2_get_buffer(q, index++); + if (!vb) + continue; prequeue--; } else { call_void_qop(q, wait_finish, q); @@ -2979,7 +3096,7 @@ static int vb2_thread(void *data) call_void_qop(q, wait_prepare, q); dprintk(q, 5, "file io: vb2_dqbuf result: %d\n", ret); if (!ret) - vb = q->bufs[index]; + vb = vb2_get_buffer(q, index); } if (ret || threadio->stop) break; diff --git a/drivers/media/common/videobuf2/videobuf2-v4l2.c b/drivers/media/common/videobuf2/videobuf2-v4l2.c index c7a54d82a55e..724135d41f7f 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -383,8 +383,7 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *md return -EINVAL; } - if (q->bufs[b->index] == NULL) { - /* Should never happen */ + if (!vb2_get_buffer(q, b->index)) { dprintk(q, 1, "%s: buffer is NULL\n", opname); return -EINVAL; } @@ -394,7 +393,7 @@ static int vb2_queue_or_prepare_buf(struct vb2_queue *q, struct media_device *md return -EINVAL; } - vb = q->bufs[b->index]; + vb = vb2_get_buffer(q, b->index); vbuf = to_vb2_v4l2_buffer(vb); ret = __verify_planes_array(vb, b); if (ret) @@ -628,11 +627,18 @@ static const struct vb2_buf_ops v4l2_buf_ops = { struct vb2_buffer *vb2_find_buffer(struct vb2_queue *q, u64 timestamp) { unsigned int i; + struct vb2_buffer *vb2; - for (i = 0; i < q->num_buffers; i++) - if (q->bufs[i]->copied_timestamp && - q->bufs[i]->timestamp == timestamp) - return vb2_get_buffer(q, i); + for (i = 0; i < q->num_buffers; i++) { + vb2 = vb2_get_buffer(q, i); + + if (!vb2) + continue; + + if (vb2->copied_timestamp && + vb2->timestamp == timestamp) + return vb2; + } return NULL; } EXPORT_SYMBOL_GPL(vb2_find_buffer); @@ -664,7 +670,13 @@ int vb2_querybuf(struct vb2_queue *q, struct v4l2_buffer *b) dprintk(q, 1, "buffer index out of range\n"); return -EINVAL; } - vb = q->bufs[b->index]; + vb = vb2_get_buffer(q, b->index); + + if (!vb) { + dprintk(q, 1, "can't find the requested buffer\n"); + return -EINVAL; + } + ret = __verify_planes_array(vb, b); if (!ret) vb2_core_querybuf(q, b->index, b); diff --git a/drivers/media/platform/amphion/vpu_dbg.c b/drivers/media/platform/amphion/vpu_dbg.c index 982c2c777484..a462d6fe4ea9 100644 --- a/drivers/media/platform/amphion/vpu_dbg.c +++ b/drivers/media/platform/amphion/vpu_dbg.c @@ -140,11 +140,18 @@ static int vpu_dbg_instance(struct seq_file *s, void *data) vq = v4l2_m2m_get_src_vq(inst->fh.m2m_ctx); for (i = 0; i < vq->num_buffers; i++) { - struct vb2_buffer *vb = vq->bufs[i]; - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct vb2_buffer *vb; + struct vb2_v4l2_buffer *vbuf; + + vb = vb2_get_buffer(vq, i); + if (!vb) + continue; if (vb->state == VB2_BUF_STATE_DEQUEUED) continue; + + vbuf = to_vb2_v4l2_buffer(vb); + num = scnprintf(str, sizeof(str), "output [%2d] state = %10s, %8s\n", i, vb2_stat_name[vb->state], @@ -155,11 +162,18 @@ static int vpu_dbg_instance(struct seq_file *s, void *data) vq = v4l2_m2m_get_dst_vq(inst->fh.m2m_ctx); for (i = 0; i < vq->num_buffers; i++) { - struct vb2_buffer *vb = vq->bufs[i]; - struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct vb2_buffer *vb; + struct vb2_v4l2_buffer *vbuf; + + vb = vb2_get_buffer(vq, i); + if (!vb) + continue; if (vb->state == VB2_BUF_STATE_DEQUEUED) continue; + + vbuf = to_vb2_v4l2_buffer(vb); + num = scnprintf(str, sizeof(str), "capture[%2d] state = %10s, %8s\n", i, vb2_stat_name[vb->state], diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c index 621038aab116..62910a1b8a98 100644 --- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c +++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c @@ -603,7 +603,11 @@ static int mtk_jpeg_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) return -EINVAL; } - vb = vq->bufs[buf->index]; + vb = vb2_get_buffer(vq, buf->index); + if (!vb) { + dev_err(ctx->jpeg->dev, "buffer not found\n"); + return -EINVAL; + } jpeg_src_buf = mtk_jpeg_vb2_to_srcbuf(vb); jpeg_src_buf->bs_size = buf->m.planes[0].bytesused; diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c index e393e3e668f8..3d2ae0e1b5b6 100644 --- a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c +++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c @@ -1696,7 +1696,7 @@ static int vdec_vp9_slice_setup_core_buffer(struct vdec_vp9_slice_instance *inst /* update internal buffer's width/height */ for (i = 0; i < vq->num_buffers; i++) { - if (vb == vq->bufs[i]) { + if (vb == vb2_get_buffer(vq, i)) { instance->dpb[i].width = w; instance->dpb[i].height = h; break; diff --git a/drivers/media/platform/st/sti/hva/hva-v4l2.c b/drivers/media/platform/st/sti/hva/hva-v4l2.c index 3a848ca32a0e..326be09bdb55 100644 --- a/drivers/media/platform/st/sti/hva/hva-v4l2.c +++ b/drivers/media/platform/st/sti/hva/hva-v4l2.c @@ -577,6 +577,10 @@ static int hva_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf) } vb2_buf = vb2_get_buffer(vq, buf->index); + if (!vb2_buf) { + dev_dbg(dev, "%s buffer index %d not found\n", ctx->name, buf->index); + return -EINVAL; + } stream = to_hva_stream(to_vb2_v4l2_buffer(vb2_buf)); stream->bytesused = buf->bytesused; } diff --git a/drivers/media/test-drivers/visl/visl-dec.c b/drivers/media/test-drivers/visl/visl-dec.c index 318d675e5668..ba20ea998d19 100644 --- a/drivers/media/test-drivers/visl/visl-dec.c +++ b/drivers/media/test-drivers/visl/visl-dec.c @@ -290,13 +290,20 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run) for (i = 0; i < out_q->num_buffers; i++) { char entry[] = "index: %u, state: %s, request_fd: %d, "; u32 old_len = len; - char *q_status = visl_get_vb2_state(out_q->bufs[i]->state); + struct vb2_buffer *vb2; + char *q_status; + + vb2 = vb2_get_buffer(out_q, i); + if (!vb2) + continue; + + q_status = visl_get_vb2_state(vb2->state); len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len, entry, i, q_status, - to_vb2_v4l2_buffer(out_q->bufs[i])->request_fd); + to_vb2_v4l2_buffer(vb2)->request_fd); - len += visl_fill_bytesused(to_vb2_v4l2_buffer(out_q->bufs[i]), + len += visl_fill_bytesused(to_vb2_v4l2_buffer(vb2), &buf[len], TPG_STR_BUF_SZ - len); @@ -342,13 +349,20 @@ static void visl_tpg_fill(struct visl_ctx *ctx, struct visl_run *run) len = 0; for (i = 0; i < cap_q->num_buffers; i++) { u32 old_len = len; - char *q_status = visl_get_vb2_state(cap_q->bufs[i]->state); + struct vb2_buffer *vb2; + char *q_status; + + vb2 = vb2_get_buffer(cap_q, i); + if (!vb2) + continue; + + q_status = visl_get_vb2_state(vb2->state); len += scnprintf(&buf[len], TPG_STR_BUF_SZ - len, "index: %u, status: %s, timestamp: %llu, is_held: %d", - cap_q->bufs[i]->index, q_status, - cap_q->bufs[i]->timestamp, - to_vb2_v4l2_buffer(cap_q->bufs[i])->is_held); + vb2->index, q_status, + vb2->timestamp, + to_vb2_v4l2_buffer(vb2)->is_held); tpg_gen_text(&ctx->tpg, basep, line++ * line_height, 16, &buf[old_len]); frame_dprintk(ctx->dev, run->dst->sequence, "%s", &buf[old_len]); diff --git a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c index d2174156573a..4b65c69fa60d 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c +++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c @@ -1061,7 +1061,7 @@ static int atomisp_dqbuf_wrapper(struct file *file, void *fh, struct v4l2_buffer if (ret) return ret; - vb = pipe->vb_queue.bufs[buf->index]; + vb = vb2_get_buffer(&pipe->vb_queue, buf->index); frame = vb_to_frame(vb); buf->reserved = asd->frame_status[buf->index];
The first step before changing how vb2 buffers are stored into queue is to avoid direct access to bufs arrays. This patch adds 2 helpers functions to add and remove vb2 buffers from a queue. With these 2 and vb2_get_buffer(), bufs field of struct vb2_queue becomes like a private member of the structure. After each call to vb2_get_buffer() we need to be sure that we get a valid pointer so check the return value of all of them. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> # Conflicts: # drivers/media/common/videobuf2/videobuf2-core.c --- .../media/common/videobuf2/videobuf2-core.c | 203 ++++++++++++++---- .../media/common/videobuf2/videobuf2-v4l2.c | 28 ++- drivers/media/platform/amphion/vpu_dbg.c | 22 +- .../platform/mediatek/jpeg/mtk_jpeg_core.c | 6 +- .../vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 2 +- drivers/media/platform/st/sti/hva/hva-v4l2.c | 4 + drivers/media/test-drivers/visl/visl-dec.c | 28 ++- .../staging/media/atomisp/pci/atomisp_ioctl.c | 2 +- 8 files changed, 230 insertions(+), 65 deletions(-)