| Message ID | 20231215090813.15610-6-benjamin.gaignard@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add DELETE_BUF ioctl | expand |
On 15/12/2023 10:08, Benjamin Gaignard wrote: > Improve __vb2_queue_free() and __vb2_free_mem() to free > range of buffers and not only the last few buffers. > Intoduce starting index to be flexible on range and change the loops > according to this parameters. > > Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> > --- > .../media/common/videobuf2/videobuf2-core.c | 62 +++++++++---------- > 1 file changed, 30 insertions(+), 32 deletions(-) > > diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c > index 9509535a980c..67ce823a0196 100644 > --- a/drivers/media/common/videobuf2/videobuf2-core.c > +++ b/drivers/media/common/videobuf2/videobuf2-core.c > @@ -525,17 +525,16 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, > } > > /* > - * __vb2_free_mem() - release all video buffer memory for a given queue > + * __vb2_free_mem() - release video buffer memory for a given range of > + * buffers in a given queue > */ > -static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) > +static void __vb2_free_mem(struct vb2_queue *q, unsigned int start, unsigned int count) > { > - unsigned int buffer; > + unsigned int i; > struct vb2_buffer *vb; > - unsigned int q_num_buffers = vb2_get_num_buffers(q); > > - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; > - ++buffer) { > - vb = vb2_get_buffer(q, buffer); > + for (i = start; i < q->max_num_buffers && i < start + count; i++) { I think the i < q->max_num_buffers check should be dropped. 'start + count' should always be <= q->max_num_buffers. That's something that must be checked in a higher level function. > + vb = vb2_get_buffer(q, i); > if (!vb) > continue; > > @@ -550,35 +549,35 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) > } > > /* > - * __vb2_queue_free() - free buffers at the end of the queue - video memory and > + * __vb2_queue_free() - free @count buffers from @start index of the queue - video memory and > * related information, if no buffers are left return the queue to an > * uninitialized state. Might be called even if the queue has already been freed. > */ > -static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) > +static void __vb2_queue_free(struct vb2_queue *q, unsigned int start, unsigned int count) > { > - unsigned int buffer; > - unsigned int q_num_buffers = vb2_get_num_buffers(q); > + unsigned int i; > > lockdep_assert_held(&q->mmap_lock); > > /* 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 = vb2_get_buffer(q, buffer); > + for (i = start; i < q->max_num_buffers && i < start + count; i++) { Ditto, and also the various instances below. > + struct vb2_buffer *vb = vb2_get_buffer(q, i); > > - if (vb && vb->planes[0].mem_priv) > + if (!vb) > + continue;> + if (vb->planes[0].mem_priv) Why change this code? > call_void_vb_qop(vb, buf_cleanup, vb); > } > > /* Release video buffer memory */ > - __vb2_free_mem(q, buffers); > + __vb2_free_mem(q, start, count); > > #ifdef CONFIG_VIDEO_ADV_DEBUG > /* > * Check that all the calls were balanced during the life-time of this > * queue. If not then dump the counters to the kernel log. > */ > - if (q_num_buffers) { > + if (vb2_get_num_buffers(q)) { > bool unbalanced = q->cnt_start_streaming != q->cnt_stop_streaming || > q->cnt_prepare_streaming != q->cnt_unprepare_streaming || > q->cnt_wait_prepare != q->cnt_wait_finish; > @@ -604,8 +603,8 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) > q->cnt_stop_streaming = 0; > q->cnt_unprepare_streaming = 0; > } > - for (buffer = 0; buffer < vb2_get_num_buffers(q); buffer++) { > - struct vb2_buffer *vb = vb2_get_buffer(q, buffer); > + for (i = start; i < q->max_num_buffers && i < start + count; i++) { > + struct vb2_buffer *vb = vb2_get_buffer(q, i); > bool unbalanced; > > if (!vb) > @@ -622,7 +621,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) > > if (unbalanced) { > pr_info("unbalanced counters for queue %p, buffer %d:\n", > - q, buffer); > + q, i); > if (vb->cnt_buf_init != vb->cnt_buf_cleanup) > pr_info(" buf_init: %u buf_cleanup: %u\n", > vb->cnt_buf_init, vb->cnt_buf_cleanup); > @@ -656,9 +655,8 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) > #endif > > /* Free vb2 buffers */ > - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; > - ++buffer) { > - struct vb2_buffer *vb = vb2_get_buffer(q, buffer); > + for (i = start; i < q->max_num_buffers && i < start + count; i++) { > + struct vb2_buffer *vb = vb2_get_buffer(q, i); > > if (!vb) > continue; > @@ -698,7 +696,7 @@ EXPORT_SYMBOL(vb2_buffer_in_use); > static bool __buffers_in_use(struct vb2_queue *q) > { > unsigned int buffer; > - for (buffer = 0; buffer < vb2_get_num_buffers(q); ++buffer) { > + for (buffer = 0; buffer < q->max_num_buffers; ++buffer) { > struct vb2_buffer *vb = vb2_get_buffer(q, buffer); > > if (!vb) > @@ -858,7 +856,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, > * queued without ever calling STREAMON. > */ > __vb2_queue_cancel(q); > - __vb2_queue_free(q, q_num_bufs); > + __vb2_queue_free(q, 0, q->max_num_buffers); > mutex_unlock(&q->mmap_lock); > > /* > @@ -968,7 +966,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, > * from already queued buffers and it will reset q->memory to > * VB2_MEMORY_UNKNOWN. > */ > - __vb2_queue_free(q, allocated_buffers); > + __vb2_queue_free(q, first_index, allocated_buffers); > mutex_unlock(&q->mmap_lock); > return ret; > } > @@ -1008,7 +1006,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, > bool no_previous_buffers = !q_num_bufs; > int ret = 0; > > - if (q->num_buffers == q->max_num_buffers) { > + if (q_num_bufs == q->max_num_buffers) { > dprintk(q, 1, "maximum number of buffers already allocated\n"); > return -ENOBUFS; > } > @@ -1108,7 +1106,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, > * from already queued buffers and it will reset q->memory to > * VB2_MEMORY_UNKNOWN. > */ > - __vb2_queue_free(q, allocated_buffers); > + __vb2_queue_free(q, *first_index, allocated_buffers); > mutex_unlock(&q->mmap_lock); > return -ENOMEM; > } > @@ -1722,7 +1720,7 @@ static int vb2_start_streaming(struct vb2_queue *q) > * Forcefully reclaim buffers if the driver did not > * correctly return them to vb2. > */ > - for (i = 0; i < vb2_get_num_buffers(q); ++i) { > + for (i = 0; i < q->max_num_buffers; ++i) { > vb = vb2_get_buffer(q, i); > > if (!vb) > @@ -2128,7 +2126,7 @@ 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 < vb2_get_num_buffers(q); i++) { > + for (i = 0; i < q->max_num_buffers; i++) { > struct vb2_buffer *vb = vb2_get_buffer(q, i); > > if (!vb) > @@ -2172,7 +2170,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q) > * call to __fill_user_buffer() after buf_finish(). That order can't > * be changed, so we can't move the buf_finish() to __vb2_dqbuf(). > */ > - for (i = 0; i < vb2_get_num_buffers(q); i++) { > + for (i = 0; i < q->max_num_buffers; i++) { > struct vb2_buffer *vb; > struct media_request *req; > > @@ -2586,7 +2584,7 @@ void vb2_core_queue_release(struct vb2_queue *q) > __vb2_cleanup_fileio(q); > __vb2_queue_cancel(q); > mutex_lock(&q->mmap_lock); > - __vb2_queue_free(q, vb2_get_num_buffers(q)); > + __vb2_queue_free(q, 0, q->max_num_buffers); > kfree(q->bufs); > q->bufs = NULL; > bitmap_free(q->bufs_bitmap); Regards, Hans
diff --git a/drivers/media/common/videobuf2/videobuf2-core.c b/drivers/media/common/videobuf2/videobuf2-core.c index 9509535a980c..67ce823a0196 100644 --- a/drivers/media/common/videobuf2/videobuf2-core.c +++ b/drivers/media/common/videobuf2/videobuf2-core.c @@ -525,17 +525,16 @@ static int __vb2_queue_alloc(struct vb2_queue *q, enum vb2_memory memory, } /* - * __vb2_free_mem() - release all video buffer memory for a given queue + * __vb2_free_mem() - release video buffer memory for a given range of + * buffers in a given queue */ -static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) +static void __vb2_free_mem(struct vb2_queue *q, unsigned int start, unsigned int count) { - unsigned int buffer; + unsigned int i; struct vb2_buffer *vb; - unsigned int q_num_buffers = vb2_get_num_buffers(q); - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; - ++buffer) { - vb = vb2_get_buffer(q, buffer); + for (i = start; i < q->max_num_buffers && i < start + count; i++) { + vb = vb2_get_buffer(q, i); if (!vb) continue; @@ -550,35 +549,35 @@ static void __vb2_free_mem(struct vb2_queue *q, unsigned int buffers) } /* - * __vb2_queue_free() - free buffers at the end of the queue - video memory and + * __vb2_queue_free() - free @count buffers from @start index of the queue - video memory and * related information, if no buffers are left return the queue to an * uninitialized state. Might be called even if the queue has already been freed. */ -static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) +static void __vb2_queue_free(struct vb2_queue *q, unsigned int start, unsigned int count) { - unsigned int buffer; - unsigned int q_num_buffers = vb2_get_num_buffers(q); + unsigned int i; lockdep_assert_held(&q->mmap_lock); /* 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 = vb2_get_buffer(q, buffer); + for (i = start; i < q->max_num_buffers && i < start + count; i++) { + struct vb2_buffer *vb = vb2_get_buffer(q, i); - if (vb && vb->planes[0].mem_priv) + if (!vb) + continue; + if (vb->planes[0].mem_priv) call_void_vb_qop(vb, buf_cleanup, vb); } /* Release video buffer memory */ - __vb2_free_mem(q, buffers); + __vb2_free_mem(q, start, count); #ifdef CONFIG_VIDEO_ADV_DEBUG /* * Check that all the calls were balanced during the life-time of this * queue. If not then dump the counters to the kernel log. */ - if (q_num_buffers) { + if (vb2_get_num_buffers(q)) { bool unbalanced = q->cnt_start_streaming != q->cnt_stop_streaming || q->cnt_prepare_streaming != q->cnt_unprepare_streaming || q->cnt_wait_prepare != q->cnt_wait_finish; @@ -604,8 +603,8 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) q->cnt_stop_streaming = 0; q->cnt_unprepare_streaming = 0; } - for (buffer = 0; buffer < vb2_get_num_buffers(q); buffer++) { - struct vb2_buffer *vb = vb2_get_buffer(q, buffer); + for (i = start; i < q->max_num_buffers && i < start + count; i++) { + struct vb2_buffer *vb = vb2_get_buffer(q, i); bool unbalanced; if (!vb) @@ -622,7 +621,7 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) if (unbalanced) { pr_info("unbalanced counters for queue %p, buffer %d:\n", - q, buffer); + q, i); if (vb->cnt_buf_init != vb->cnt_buf_cleanup) pr_info(" buf_init: %u buf_cleanup: %u\n", vb->cnt_buf_init, vb->cnt_buf_cleanup); @@ -656,9 +655,8 @@ static void __vb2_queue_free(struct vb2_queue *q, unsigned int buffers) #endif /* Free vb2 buffers */ - for (buffer = q_num_buffers - buffers; buffer < q_num_buffers; - ++buffer) { - struct vb2_buffer *vb = vb2_get_buffer(q, buffer); + for (i = start; i < q->max_num_buffers && i < start + count; i++) { + struct vb2_buffer *vb = vb2_get_buffer(q, i); if (!vb) continue; @@ -698,7 +696,7 @@ EXPORT_SYMBOL(vb2_buffer_in_use); static bool __buffers_in_use(struct vb2_queue *q) { unsigned int buffer; - for (buffer = 0; buffer < vb2_get_num_buffers(q); ++buffer) { + for (buffer = 0; buffer < q->max_num_buffers; ++buffer) { struct vb2_buffer *vb = vb2_get_buffer(q, buffer); if (!vb) @@ -858,7 +856,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * queued without ever calling STREAMON. */ __vb2_queue_cancel(q); - __vb2_queue_free(q, q_num_bufs); + __vb2_queue_free(q, 0, q->max_num_buffers); mutex_unlock(&q->mmap_lock); /* @@ -968,7 +966,7 @@ int vb2_core_reqbufs(struct vb2_queue *q, enum vb2_memory memory, * from already queued buffers and it will reset q->memory to * VB2_MEMORY_UNKNOWN. */ - __vb2_queue_free(q, allocated_buffers); + __vb2_queue_free(q, first_index, allocated_buffers); mutex_unlock(&q->mmap_lock); return ret; } @@ -1008,7 +1006,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, bool no_previous_buffers = !q_num_bufs; int ret = 0; - if (q->num_buffers == q->max_num_buffers) { + if (q_num_bufs == q->max_num_buffers) { dprintk(q, 1, "maximum number of buffers already allocated\n"); return -ENOBUFS; } @@ -1108,7 +1106,7 @@ int vb2_core_create_bufs(struct vb2_queue *q, enum vb2_memory memory, * from already queued buffers and it will reset q->memory to * VB2_MEMORY_UNKNOWN. */ - __vb2_queue_free(q, allocated_buffers); + __vb2_queue_free(q, *first_index, allocated_buffers); mutex_unlock(&q->mmap_lock); return -ENOMEM; } @@ -1722,7 +1720,7 @@ static int vb2_start_streaming(struct vb2_queue *q) * Forcefully reclaim buffers if the driver did not * correctly return them to vb2. */ - for (i = 0; i < vb2_get_num_buffers(q); ++i) { + for (i = 0; i < q->max_num_buffers; ++i) { vb = vb2_get_buffer(q, i); if (!vb) @@ -2128,7 +2126,7 @@ 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 < vb2_get_num_buffers(q); i++) { + for (i = 0; i < q->max_num_buffers; i++) { struct vb2_buffer *vb = vb2_get_buffer(q, i); if (!vb) @@ -2172,7 +2170,7 @@ static void __vb2_queue_cancel(struct vb2_queue *q) * call to __fill_user_buffer() after buf_finish(). That order can't * be changed, so we can't move the buf_finish() to __vb2_dqbuf(). */ - for (i = 0; i < vb2_get_num_buffers(q); i++) { + for (i = 0; i < q->max_num_buffers; i++) { struct vb2_buffer *vb; struct media_request *req; @@ -2586,7 +2584,7 @@ void vb2_core_queue_release(struct vb2_queue *q) __vb2_cleanup_fileio(q); __vb2_queue_cancel(q); mutex_lock(&q->mmap_lock); - __vb2_queue_free(q, vb2_get_num_buffers(q)); + __vb2_queue_free(q, 0, q->max_num_buffers); kfree(q->bufs); q->bufs = NULL; bitmap_free(q->bufs_bitmap);
Improve __vb2_queue_free() and __vb2_free_mem() to free range of buffers and not only the last few buffers. Intoduce starting index to be flexible on range and change the loops according to this parameters. Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com> --- .../media/common/videobuf2/videobuf2-core.c | 62 +++++++++---------- 1 file changed, 30 insertions(+), 32 deletions(-)