| Message ID | 20230321102855.346732-2-benjamin.gaignard@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add DELETE_BUF ioctl | expand |
Hi Benjamin,
I love your patch! Yet something to improve:
[auto build test ERROR on media-tree/master]
[also build test ERROR on linus/master v6.3-rc3 next-20230321]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Benjamin-Gaignard/media-videobuf2-Access-vb2_queue-bufs-array-through-helper-functions/20230321-183154
base: git://linuxtv.org/media_tree.git master
patch link: https://lore.kernel.org/r/20230321102855.346732-2-benjamin.gaignard%40collabora.com
patch subject: [PATCH v2 1/8] media: videobuf2: Access vb2_queue bufs array through helper functions
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20230322/202303220154.ioaH1XLM-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/625d46c1c1fe8e3229a780134d21bcd4a017cfdd
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Benjamin-Gaignard/media-videobuf2-Access-vb2_queue-bufs-array-through-helper-functions/20230321-183154
git checkout 625d46c1c1fe8e3229a780134d21bcd4a017cfdd
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 olddefconfig
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/staging/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303220154.ioaH1XLM-lkp@intel.com/
All errors (new ones prefixed by >>):
drivers/staging/media/atomisp/pci/atomisp_ioctl.c: In function 'atomisp_dqbuf_wrapper':
>> drivers/staging/media/atomisp/pci/atomisp_ioctl.c:1098:33: error: incompatible type for argument 1 of 'vb2_get_buffer'
1098 | vb = vb2_get_buffer(pipe->vb_queue, buf->index);
| ~~~~^~~~~~~~~~
| |
| struct vb2_queue
In file included from include/media/videobuf2-v4l2.h:16,
from drivers/staging/media/atomisp//pci/ia_css_frame_public.h:23,
from drivers/staging/media/atomisp/pci/sh_css_legacy.h:22,
from drivers/staging/media/atomisp/pci/atomisp_internal.h:34,
from drivers/staging/media/atomisp/pci/atomisp_cmd.h:30,
from drivers/staging/media/atomisp/pci/atomisp_ioctl.c:27:
include/media/videobuf2-core.h:1239:67: note: expected 'struct vb2_queue *' but argument is of type 'struct vb2_queue'
1239 | static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q,
| ~~~~~~~~~~~~~~~~~~^
vim +/vb2_get_buffer +1098 drivers/staging/media/atomisp/pci/atomisp_ioctl.c
1083
1084 static int atomisp_dqbuf_wrapper(struct file *file, void *fh, struct v4l2_buffer *buf)
1085 {
1086 struct video_device *vdev = video_devdata(file);
1087 struct atomisp_video_pipe *pipe = atomisp_to_video_pipe(vdev);
1088 struct atomisp_sub_device *asd = pipe->asd;
1089 struct atomisp_device *isp = video_get_drvdata(vdev);
1090 struct ia_css_frame *frame;
1091 struct vb2_buffer *vb;
1092 int ret;
1093
1094 ret = vb2_ioctl_dqbuf(file, fh, buf);
1095 if (ret)
1096 return ret;
1097
> 1098 vb = vb2_get_buffer(pipe->vb_queue, buf->index);
1099 frame = vb_to_frame(vb);
1100
1101 buf->reserved = asd->frame_status[buf->index];
1102
1103 /*
1104 * Hack:
1105 * Currently frame_status in the enum type which takes no more lower
1106 * 8 bit.
1107 * use bit[31:16] for exp_id as it is only in the range of 1~255
1108 */
1109 buf->reserved &= 0x0000ffff;
1110 if (!(buf->flags & V4L2_BUF_FLAG_ERROR))
1111 buf->reserved |= frame->exp_id;
1112 buf->reserved2 = pipe->frame_config_id[buf->index];
1113
1114 dev_dbg(isp->dev,
1115 "dqbuf buffer %d (%s) for asd%d with exp_id %d, isp_config_id %d\n",
1116 buf->index, vdev->name, asd->index, buf->reserved >> 16,
1117 buf->reserved2);
1118 return 0;
1119 }
1120
Hi Benjamin, On Tue, Mar 21, 2023 at 11:28:48AM +0100, 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. > > Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> > --- > .../media/common/videobuf2/videobuf2-core.c | 84 +++++++++++-------- > .../media/common/videobuf2/videobuf2-v4l2.c | 17 ++-- > drivers/media/platform/amphion/vpu_dbg.c | 4 +- > .../platform/mediatek/jpeg/mtk_jpeg_core.c | 2 +- > .../vcodec/vdec/vdec_vp9_req_lat_if.c | 2 +- > drivers/media/test-drivers/visl/visl-dec.c | 16 ++-- > .../staging/media/atomisp/pci/atomisp_ioctl.c | 2 +- > include/media/videobuf2-core.h | 26 ++++++ > 8 files changed, 101 insertions(+), 52 deletions(-) > Sorry for being late with review and thanks a lot for working on this. This is a quite a long overdue functionality. [snip] > @@ -2679,7 +2689,13 @@ 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; Out of curiosity, is there any reason for specifically chosing -EBUSY here? It shouldn't be possible for this to happen, but since we're dealing with a pointer here, a NULL check is a good thing. I guess that makes -EBUSY as good as any other code here. I see some other similar places in the code, with a comment "This shouldn't happen" and a dprinkt(). Maybe it would be good to add those here too? > + goto err_reqbufs; > + } > + > + if (vb->num_planes != 1) { > ret = -EBUSY; > goto err_reqbufs; > } > @@ -2688,12 +2704,14 @@ 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); > + > + 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 +2839,15 @@ 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); > > /* > * 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) { > @@ -2872,7 +2890,7 @@ 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); > > /* > * Check if this is the last buffer to read. > @@ -2899,7 +2917,7 @@ 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(vb2_get_buffer(q, index), 0); > fileio->q_count += 1; > /* > * If we are queuing up buffers for the first time, then > @@ -2970,7 +2988,7 @@ 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++); > prequeue--; > } else { > call_void_qop(q, wait_finish, q); > @@ -2979,7 +2997,7 @@ 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 1f5d235a8441..01b2bb957239 100644 > --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c > +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c > @@ -383,7 +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) { > + if (!vb2_get_buffer(q, b->index)) { > /* Should never happen */ > dprintk(q, 1, "%s: buffer is NULL\n", opname); > return -EINVAL; > @@ -394,7 +394,7 @@ 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 +628,14 @@ 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->copied_timestamp && > + vb2->timestamp == timestamp) > + return vb2; > + } > return NULL; > } > EXPORT_SYMBOL_GPL(vb2_find_buffer); > @@ -664,7 +667,7 @@ 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); > 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 44b830ae01d8..8a423c1f6b55 100644 > --- a/drivers/media/platform/amphion/vpu_dbg.c > +++ b/drivers/media/platform/amphion/vpu_dbg.c > @@ -133,7 +133,7 @@ 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_buffer *vb = vb2_get_buffer(vq, i); > struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); > > if (vb->state == VB2_BUF_STATE_DEQUEUED) > @@ -148,7 +148,7 @@ 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_buffer *vb = vb2_get_buffer(vq, i); > struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); > > if (vb->state == VB2_BUF_STATE_DEQUEUED) > diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c > index 969516a940ba..0be07f691d9a 100644 > --- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c > +++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c > @@ -603,7 +603,7 @@ 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); > 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/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c > index cbb6728b8a40..f5958b6d834a 100644 > --- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c > +++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c > @@ -1701,7 +1701,7 @@ 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/test-drivers/visl/visl-dec.c b/drivers/media/test-drivers/visl/visl-dec.c > index 318d675e5668..328016b456ba 100644 > --- a/drivers/media/test-drivers/visl/visl-dec.c > +++ b/drivers/media/test-drivers/visl/visl-dec.c > @@ -290,13 +290,14 @@ 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 = vb2_get_buffer(out_q, i); > + char *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 +343,14 @@ 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 = vb2_get_buffer(cap_q, i); > + char *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 d1314bdbf7d5..c7778860f3d4 100644 > --- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c > +++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c > @@ -1095,7 +1095,7 @@ 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]; > diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h > index 4b6a9d2ea372..5b1e3d801546 100644 > --- a/include/media/videobuf2-core.h > +++ b/include/media/videobuf2-core.h > @@ -1244,6 +1244,32 @@ static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q, > return NULL; > } > > +/** > + * 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. > + */ > +static inline bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb) Could we make index an argument to this function and actually assign it to vb->index if the operation succeeds? Similarly, could we assign q to vb->vb2_queue in this function as well? I have plans to make the vb2_buffer struct represent a buffer, rather than an entry in the queue, because the memory can actually outlive the queue, e.g. when REQBUFS(0) happens, but an exported DMA-buf still references the buffer. Currently the DMA-buf object is tied to the allocator-private struct, but that one has a pointer to a vb2_buffer, which becomes invalid in such scenario with current implementation. > +{ > + if (vb->index < VB2_MAX_FRAME) { > + q->bufs[vb->index] = vb; > + 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 inline void vb2_queue_remove_buffer(struct vb2_queue *q, struct vb2_buffer *vb) > +{ > + if (vb->index < VB2_MAX_FRAME) > + q->bufs[vb->index] = NULL; Here we could also NULLify vb->vb2_queue. Right now I think the struct would be just kfree()d instantly after returning to the caller, but with the design I mentioned above, it could still stay there until the last reference goes away. Best regards, Tomasz
Le 18/05/2023 à 12:37, Tomasz Figa a écrit : > Hi Benjamin, > > On Tue, Mar 21, 2023 at 11:28:48AM +0100, 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. >> >> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> >> --- >> .../media/common/videobuf2/videobuf2-core.c | 84 +++++++++++-------- >> .../media/common/videobuf2/videobuf2-v4l2.c | 17 ++-- >> drivers/media/platform/amphion/vpu_dbg.c | 4 +- >> .../platform/mediatek/jpeg/mtk_jpeg_core.c | 2 +- >> .../vcodec/vdec/vdec_vp9_req_lat_if.c | 2 +- >> drivers/media/test-drivers/visl/visl-dec.c | 16 ++-- >> .../staging/media/atomisp/pci/atomisp_ioctl.c | 2 +- >> include/media/videobuf2-core.h | 26 ++++++ >> 8 files changed, 101 insertions(+), 52 deletions(-) >> > Sorry for being late with review and thanks a lot for working on this. > This is a quite a long overdue functionality. > > [snip] > >> @@ -2679,7 +2689,13 @@ 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; > Out of curiosity, is there any reason for specifically chosing -EBUSY here? > > It shouldn't be possible for this to happen, but since we're > dealing with a pointer here, a NULL check is a good thing. I guess that makes > -EBUSY as good as any other code here. I have used -EBUSY to be aligned with the other errors case of this function. In the following patches I introduce DELETE_BUF ioctl and deleting a buffer from the array could create case where vb is NULL. > > I see some other similar places in the code, with a comment "This shouldn't > happen" and a dprinkt(). Maybe it would be good to add those here too? I'm working on that in v3 of this series. > >> + goto err_reqbufs; >> + } >> + >> + if (vb->num_planes != 1) { >> ret = -EBUSY; >> goto err_reqbufs; >> } >> @@ -2688,12 +2704,14 @@ 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); >> + >> + 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 +2839,15 @@ 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); >> >> /* >> * 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) { >> @@ -2872,7 +2890,7 @@ 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); >> >> /* >> * Check if this is the last buffer to read. >> @@ -2899,7 +2917,7 @@ 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(vb2_get_buffer(q, index), 0); >> fileio->q_count += 1; >> /* >> * If we are queuing up buffers for the first time, then >> @@ -2970,7 +2988,7 @@ 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++); >> prequeue--; >> } else { >> call_void_qop(q, wait_finish, q); >> @@ -2979,7 +2997,7 @@ 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 1f5d235a8441..01b2bb957239 100644 >> --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c >> +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c >> @@ -383,7 +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) { >> + if (!vb2_get_buffer(q, b->index)) { >> /* Should never happen */ >> dprintk(q, 1, "%s: buffer is NULL\n", opname); >> return -EINVAL; >> @@ -394,7 +394,7 @@ 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 +628,14 @@ 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->copied_timestamp && >> + vb2->timestamp == timestamp) >> + return vb2; >> + } >> return NULL; >> } >> EXPORT_SYMBOL_GPL(vb2_find_buffer); >> @@ -664,7 +667,7 @@ 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); >> 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 44b830ae01d8..8a423c1f6b55 100644 >> --- a/drivers/media/platform/amphion/vpu_dbg.c >> +++ b/drivers/media/platform/amphion/vpu_dbg.c >> @@ -133,7 +133,7 @@ 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_buffer *vb = vb2_get_buffer(vq, i); >> struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); >> >> if (vb->state == VB2_BUF_STATE_DEQUEUED) >> @@ -148,7 +148,7 @@ 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_buffer *vb = vb2_get_buffer(vq, i); >> struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); >> >> if (vb->state == VB2_BUF_STATE_DEQUEUED) >> diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c >> index 969516a940ba..0be07f691d9a 100644 >> --- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c >> +++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c >> @@ -603,7 +603,7 @@ 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); >> 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/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c >> index cbb6728b8a40..f5958b6d834a 100644 >> --- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c >> +++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c >> @@ -1701,7 +1701,7 @@ 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/test-drivers/visl/visl-dec.c b/drivers/media/test-drivers/visl/visl-dec.c >> index 318d675e5668..328016b456ba 100644 >> --- a/drivers/media/test-drivers/visl/visl-dec.c >> +++ b/drivers/media/test-drivers/visl/visl-dec.c >> @@ -290,13 +290,14 @@ 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 = vb2_get_buffer(out_q, i); >> + char *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 +343,14 @@ 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 = vb2_get_buffer(cap_q, i); >> + char *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 d1314bdbf7d5..c7778860f3d4 100644 >> --- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c >> +++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c >> @@ -1095,7 +1095,7 @@ 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]; >> diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h >> index 4b6a9d2ea372..5b1e3d801546 100644 >> --- a/include/media/videobuf2-core.h >> +++ b/include/media/videobuf2-core.h >> @@ -1244,6 +1244,32 @@ static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q, >> return NULL; >> } >> >> +/** >> + * 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. >> + */ >> +static inline bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb) > Could we make index an argument to this function and actually assign it to > vb->index if the operation succeeds? > Similarly, could we assign q to vb->vb2_queue in this function as well? > > I have plans to make the vb2_buffer struct represent a buffer, rather than > an entry in the queue, because the memory can actually outlive the queue, > e.g. when REQBUFS(0) happens, but an exported DMA-buf still references the > buffer. Currently the DMA-buf object is tied to the allocator-private > struct, but that one has a pointer to a vb2_buffer, which becomes invalid > in such scenario with current implementation. I will do that in v3. > >> +{ >> + if (vb->index < VB2_MAX_FRAME) { >> + q->bufs[vb->index] = vb; >> + 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 inline void vb2_queue_remove_buffer(struct vb2_queue *q, struct vb2_buffer *vb) >> +{ >> + if (vb->index < VB2_MAX_FRAME) >> + q->bufs[vb->index] = NULL; > Here we could also NULLify vb->vb2_queue. Right now I think the struct > would be just kfree()d instantly after returning to the caller, but with > the design I mentioned above, it could still stay there until the last > reference goes away. Same I will do that in v3. Thanks for your feedback. Benjamin > > Best regards, > Tomasz >
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index cf6727d9c81f..79e90e338846 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -359,7 +359,7 @@ static void __setup_offsets(struct vb2_buffer *vb) unsigned long off = 0; if (vb->index) { - struct vb2_buffer *prev = q->bufs[vb->index - 1]; + struct vb2_buffer *prev = vb2_get_buffer(q, vb->index - 1); struct vb2_plane *p = &prev->planes[prev->num_planes - 1]; off = PAGE_ALIGN(p->m.offset + p->length); @@ -437,7 +437,11 @@ 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)) { + 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) { @@ -445,7 +449,7 @@ 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; } @@ -460,7 +464,7 @@ 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; } @@ -483,7 +487,7 @@ 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; @@ -511,7 +515,7 @@ 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); @@ -551,7 +555,7 @@ 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]; + struct vb2_buffer *vb = vb2_get_buffer(q, 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 || @@ -591,8 +595,10 @@ 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); + + vb2_queue_remove_buffer(q, vb); + kfree(vb); } q->num_buffers -= buffers; @@ -628,7 +634,7 @@ 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])) + if (vb2_buffer_in_use(q, vb2_get_buffer(q, buffer))) return true; } return false; @@ -636,7 +642,7 @@ 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); + call_void_bufop(q, fill_user_buffer, vb2_get_buffer(q, index), pb); } EXPORT_SYMBOL_GPL(vb2_core_querybuf); @@ -1547,7 +1553,7 @@ 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->state != VB2_BUF_STATE_DEQUEUED) { dprintk(q, 1, "invalid buffer state %s\n", vb2_state_name(vb->state)); @@ -1618,7 +1624,7 @@ 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->state == VB2_BUF_STATE_ACTIVE) vb2_buffer_done(vb, VB2_BUF_STATE_QUEUED); } @@ -1646,7 +1652,7 @@ 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 (!req && vb->state != VB2_BUF_STATE_IN_REQUEST && q->requires_requests) { @@ -2022,12 +2028,15 @@ 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->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)); } @@ -2061,7 +2070,7 @@ 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 vb2_buffer *vb = vb2_get_buffer(q, i); struct media_request *req = vb->req_obj.req; /* @@ -2215,7 +2224,7 @@ static int __find_plane_by_offset(struct vb2_queue *q, unsigned long off, * return its buffer and plane numbers. */ for (buffer = 0; buffer < q->num_buffers; ++buffer) { - vb = q->bufs[buffer]; + vb = vb2_get_buffer(q, buffer); for (plane = 0; plane < vb->num_planes; ++plane) { if (vb->planes[plane].m.offset == off) { @@ -2262,7 +2271,7 @@ 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 (plane >= vb->num_planes) { dprintk(q, 1, "buffer plane out of range\n"); @@ -2339,7 +2348,7 @@ 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); /* * MMAP requires page_aligned buffers. @@ -2396,7 +2405,7 @@ unsigned long vb2_get_unmapped_area(struct vb2_queue *q, if (ret) goto unlock; - vb = q->bufs[buffer]; + vb = vb2_get_buffer(q, buffer); vaddr = vb2_plane_vaddr(vb, plane); mutex_unlock(&q->mmap_lock); @@ -2625,6 +2634,7 @@ 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 +2689,13 @@ 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 +2704,14 @@ 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); + + 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 +2839,15 @@ 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); /* * 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) { @@ -2872,7 +2890,7 @@ 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); /* * Check if this is the last buffer to read. @@ -2899,7 +2917,7 @@ 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(vb2_get_buffer(q, index), 0); fileio->q_count += 1; /* * If we are queuing up buffers for the first time, then @@ -2970,7 +2988,7 @@ 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++); prequeue--; } else { call_void_qop(q, wait_finish, q); @@ -2979,7 +2997,7 @@ 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 1f5d235a8441..01b2bb957239 100644 --- a/drivers/media/common/videobuf2/videobuf2-v4l2.c +++ b/drivers/media/common/videobuf2/videobuf2-v4l2.c @@ -383,7 +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) { + if (!vb2_get_buffer(q, b->index)) { /* Should never happen */ dprintk(q, 1, "%s: buffer is NULL\n", opname); return -EINVAL; @@ -394,7 +394,7 @@ 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 +628,14 @@ 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->copied_timestamp && + vb2->timestamp == timestamp) + return vb2; + } return NULL; } EXPORT_SYMBOL_GPL(vb2_find_buffer); @@ -664,7 +667,7 @@ 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); 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 44b830ae01d8..8a423c1f6b55 100644 --- a/drivers/media/platform/amphion/vpu_dbg.c +++ b/drivers/media/platform/amphion/vpu_dbg.c @@ -133,7 +133,7 @@ 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_buffer *vb = vb2_get_buffer(vq, i); struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); if (vb->state == VB2_BUF_STATE_DEQUEUED) @@ -148,7 +148,7 @@ 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_buffer *vb = vb2_get_buffer(vq, i); struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); if (vb->state == VB2_BUF_STATE_DEQUEUED) diff --git a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c index 969516a940ba..0be07f691d9a 100644 --- a/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c +++ b/drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c @@ -603,7 +603,7 @@ 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); 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/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c index cbb6728b8a40..f5958b6d834a 100644 --- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c +++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c @@ -1701,7 +1701,7 @@ 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/test-drivers/visl/visl-dec.c b/drivers/media/test-drivers/visl/visl-dec.c index 318d675e5668..328016b456ba 100644 --- a/drivers/media/test-drivers/visl/visl-dec.c +++ b/drivers/media/test-drivers/visl/visl-dec.c @@ -290,13 +290,14 @@ 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 = vb2_get_buffer(out_q, i); + char *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 +343,14 @@ 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 = vb2_get_buffer(cap_q, i); + char *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 d1314bdbf7d5..c7778860f3d4 100644 --- a/drivers/staging/media/atomisp/pci/atomisp_ioctl.c +++ b/drivers/staging/media/atomisp/pci/atomisp_ioctl.c @@ -1095,7 +1095,7 @@ 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]; diff --git a/include/media/videobuf2-core.h b/include/media/videobuf2-core.h index 4b6a9d2ea372..5b1e3d801546 100644 --- a/include/media/videobuf2-core.h +++ b/include/media/videobuf2-core.h @@ -1244,6 +1244,32 @@ static inline struct vb2_buffer *vb2_get_buffer(struct vb2_queue *q, return NULL; } +/** + * 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. + */ +static inline bool vb2_queue_add_buffer(struct vb2_queue *q, struct vb2_buffer *vb) +{ + if (vb->index < VB2_MAX_FRAME) { + q->bufs[vb->index] = vb; + 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 inline void vb2_queue_remove_buffer(struct vb2_queue *q, struct vb2_buffer *vb) +{ + if (vb->index < VB2_MAX_FRAME) + q->bufs[vb->index] = NULL; +} + /* * The following functions are not part of the vb2 core API, but are useful * functions for videobuf2-*.
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. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> --- .../media/common/videobuf2/videobuf2-core.c | 84 +++++++++++-------- .../media/common/videobuf2/videobuf2-v4l2.c | 17 ++-- drivers/media/platform/amphion/vpu_dbg.c | 4 +- .../platform/mediatek/jpeg/mtk_jpeg_core.c | 2 +- .../vcodec/vdec/vdec_vp9_req_lat_if.c | 2 +- drivers/media/test-drivers/visl/visl-dec.c | 16 ++-- .../staging/media/atomisp/pci/atomisp_ioctl.c | 2 +- include/media/videobuf2-core.h | 26 ++++++ 8 files changed, 101 insertions(+), 52 deletions(-)