| /Linux-v4.19/drivers/media/platform/vivid/ |
| D | vivid-vid-common.c | 41 .buffers = 1,
50 .buffers = 1,
58 .buffers = 1,
66 .buffers = 1,
74 .buffers = 1,
82 .buffers = 1,
90 .buffers = 1,
98 .buffers = 1,
106 .buffers = 1,
114 .buffers = 1,
[all …]
|
| /Linux-v4.19/lib/xz/ |
| D | xz_dec_test.c | 52 static struct xz_buf buffers = { variable
75 buffers.in_pos = 0; in xz_dec_test_open()
76 buffers.in_size = 0; in xz_dec_test_open()
77 buffers.out_pos = 0; in xz_dec_test_open()
120 while ((remaining > 0 || buffers.out_pos == buffers.out_size) in xz_dec_test_write()
122 if (buffers.in_pos == buffers.in_size) { in xz_dec_test_write()
123 buffers.in_pos = 0; in xz_dec_test_write()
124 buffers.in_size = min(remaining, sizeof(buffer_in)); in xz_dec_test_write()
125 if (copy_from_user(buffer_in, buf, buffers.in_size)) in xz_dec_test_write()
128 buf += buffers.in_size; in xz_dec_test_write()
[all …]
|
| /Linux-v4.19/Documentation/media/uapi/v4l/ |
| D | mmap.rst | 17 Streaming is an I/O method where only pointers to buffers are exchanged
19 mapping is primarily intended to map buffers in device memory into the
23 drivers support streaming as well, allocating buffers in DMA-able main
26 A driver can support many sets of buffers. Each set is identified by a
31 To allocate device buffers applications call the
33 of buffers and buffer type, for example ``V4L2_BUF_TYPE_VIDEO_CAPTURE``.
34 This ioctl can also be used to change the number of buffers or to free
35 the allocated memory, provided none of the buffers are still mapped.
37 Before applications can access the buffers they must map them into their
39 location of the buffers in device memory can be determined with the
[all …]
|
| D | capture.c.rst | 51 struct buffer *buffers;
91 if (-1 == read(fd, buffers[0].start, buffers[0].length)) {
106 process_image(buffers[0].start, buffers[0].length);
132 process_image(buffers[buf.index].start, buf.bytesused);
160 if (buf.m.userptr == (unsigned long)buffers[i].start
161 && buf.length == buffers[i].length)
268 buf.m.userptr = (unsigned long)buffers[i].start;
269 buf.length = buffers[i].length;
287 free(buffers[0].start);
292 if (-1 == munmap(buffers[i].start, buffers[i].length))
[all …]
|
| D | vidioc-reqbufs.rst | 36 Memory mapped buffers are located in device memory and must be allocated
38 space. User buffers are allocated by applications themselves, and this
40 to setup some internal structures. Similarly, DMABUF buffers are
45 To allocate device buffers applications initialize all fields of the
48 the desired number of buffers, ``memory`` must be set to the requested
51 allocate the requested number of buffers and it stores the actual number
54 number is also possible when the driver requires more buffers to
56 buffers, one displayed and one filled by the application.
62 buffers, however this cannot succeed when any buffers are still mapped.
63 A ``count`` value of zero frees all buffers, after aborting or finishing
[all …]
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| D | userp.rst | 25 No buffers (planes) are allocated beforehand, consequently they are not
26 indexed and cannot be queried like mapped buffers with the
50 :ref:`VIDIOC_QBUF <VIDIOC_QBUF>` ioctl. Although buffers are commonly
59 Filled or displayed buffers are dequeued with the
65 Applications must take care not to free buffers without dequeuing. For
66 once, the buffers remain locked until further, wasting physical memory.
72 buffers, to start capturing and enter the read loop. Here the
75 and enqueue buffers, when enough buffers are stacked up output is
77 buffers it must wait until an empty buffer can be dequeued and reused.
79 more buffers can be dequeued. By default :ref:`VIDIOC_DQBUF
[all …]
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| D | vidioc-create-bufs.rst | 12 VIDIOC_CREATE_BUFS - Create buffers for Memory Mapped or User Pointer or DMA Buffer I/O
35 This ioctl is used to create buffers for :ref:`memory mapped <mmap>`
39 over buffers is required. This ioctl can be called multiple times to
40 create buffers of different sizes.
42 To allocate the device buffers applications must initialize the relevant
44 ``count`` field must be set to the number of requested buffers, the
48 The ``format`` field specifies the image format that the buffers must be
55 sizes (for multi-planar formats) will be used for the allocated buffers.
59 The buffers created by this ioctl will have as minimum size the size
69 will attempt to allocate up to the requested number of buffers and store
[all …]
|
| D | dmabuf.rst | 9 The DMABUF framework provides a generic method for sharing buffers
18 exporting V4L2 buffers as DMABUF file descriptors.
24 importing DMA buffers through DMABUF file descriptors is supported is
28 This I/O method is dedicated to sharing DMA buffers between different
31 application. Next, these buffers are exported to the application as file
63 buffers, every plane can be associated with a different DMABUF
64 descriptor. Although buffers are commonly cycled, applications can pass
121 Captured or displayed buffers are dequeued with the
129 buffers, to start capturing and enter the read loop. Here the
132 and enqueue buffers, when enough buffers are stacked up output is
[all …]
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| D | vidioc-streamon.rst | 42 Capture hardware is disabled and no input buffers are filled (if there
43 are any empty buffers in the incoming queue) until ``VIDIOC_STREAMON``
51 If ``VIDIOC_STREAMON`` fails then any already queued buffers will remain
55 in progress, unlocks any user pointer buffers locked in physical memory,
56 and it removes all buffers from the incoming and outgoing queues. That
63 If buffers have been queued with :ref:`VIDIOC_QBUF` and
65 ``VIDIOC_STREAMON``, then those queued buffers will also be removed from
77 but ``VIDIOC_STREAMOFF`` will return queued buffers to their starting
96 The buffer ``type`` is not supported, or no buffers have been
|
| D | v4l2grab.c.rst | 67 struct buffer *buffers;
96 buffers = calloc(req.count, sizeof(*buffers));
106 buffers[n_buffers].length = buf.length;
107 buffers[n_buffers].start = v4l2_mmap(NULL, buf.length,
111 if (MAP_FAILED == buffers[n_buffers].start) {
156 fwrite(buffers[buf.index].start, buf.bytesused, 1, fout);
165 v4l2_munmap(buffers[i].start, buffers[i].length);
|
| /Linux-v4.19/drivers/staging/media/zoran/ |
| D | zoran_driver.c | 192 fh->buffers.buffer_size = v4l_bufsize; in map_mode_raw()
193 fh->buffers.num_buffers = v4l_nbufs; in map_mode_raw()
198 fh->buffers.buffer_size = jpg_bufsize; in map_mode_jpg()
199 fh->buffers.num_buffers = jpg_nbufs; in map_mode_jpg()
218 for (i = 0; i < fh->buffers.num_buffers; i++) { in v4l_fbuffer_alloc()
219 if (fh->buffers.buffer[i].v4l.fbuffer) in v4l_fbuffer_alloc()
226 mem = kmalloc(fh->buffers.buffer_size, in v4l_fbuffer_alloc()
236 fh->buffers.buffer[i].v4l.fbuffer = mem; in v4l_fbuffer_alloc()
237 fh->buffers.buffer[i].v4l.fbuffer_phys = virt_to_phys(mem); in v4l_fbuffer_alloc()
238 fh->buffers.buffer[i].v4l.fbuffer_bus = virt_to_bus(mem); in v4l_fbuffer_alloc()
[all …]
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| /Linux-v4.19/drivers/android/ |
| D | binder_alloc_selftest.c | 124 struct binder_buffer *buffers[], in binder_selftest_alloc_buf() argument
130 buffers[i] = binder_alloc_new_buf(alloc, sizes[i], 0, 0, 0); in binder_selftest_alloc_buf()
131 if (IS_ERR(buffers[i]) || in binder_selftest_alloc_buf()
132 !check_buffer_pages_allocated(alloc, buffers[i], in binder_selftest_alloc_buf()
141 struct binder_buffer *buffers[], in binder_selftest_free_buf() argument
147 binder_alloc_free_buf(alloc, buffers[seq[i]]); in binder_selftest_free_buf()
187 struct binder_buffer *buffers[BUFFER_NUM]; in binder_selftest_alloc_free() local
189 binder_selftest_alloc_buf(alloc, buffers, sizes, seq); in binder_selftest_alloc_free()
190 binder_selftest_free_buf(alloc, buffers, sizes, seq, end); in binder_selftest_alloc_free()
193 binder_selftest_alloc_buf(alloc, buffers, sizes, seq); in binder_selftest_alloc_free()
[all …]
|
| /Linux-v4.19/drivers/iio/buffer/ |
| D | industrialio-hw-consumer.c | 23 struct list_head buffers; member
58 list_for_each_entry(buf, &hwc->buffers, head) { in iio_hw_consumer_get_buffer()
72 list_add_tail(&buf->head, &hwc->buffers); in iio_hw_consumer_get_buffer()
94 INIT_LIST_HEAD(&hwc->buffers); in iio_hw_consumer_alloc()
116 list_for_each_entry(buf, &hwc->buffers, head) in iio_hw_consumer_alloc()
134 list_for_each_entry_safe(buf, n, &hwc->buffers, head) in iio_hw_consumer_free()
217 list_for_each_entry(buf, &hwc->buffers, head) { in iio_hw_consumer_enable()
226 list_for_each_entry_continue_reverse(buf, &hwc->buffers, head) in iio_hw_consumer_enable()
240 list_for_each_entry(buf, &hwc->buffers, head) in iio_hw_consumer_disable()
|
| /Linux-v4.19/Documentation/media/uapi/dvb/ |
| D | dmx-reqbufs.rst | 36 Memory mapped buffers are located in device memory and must be allocated
38 space. User buffers are allocated by applications themselves, and this
40 to setup some internal structures. Similarly, DMABUF buffers are
45 To allocate device buffers applications initialize all fields of the
47 to the desired number of buffers, and ``size`` to the size of each
51 attempt to allocate the requested number of buffers and it stores the actual
53 number is also possible when the driver requires more buffers to
61 buffers, however this cannot succeed when any buffers are still mapped.
62 A ``count`` value of zero frees all buffers, after aborting or finishing
|
| /Linux-v4.19/drivers/media/pci/ivtv/ |
| D | ivtv-queue.c | 47 q->buffers = 0; in ivtv_queue_init()
65 q->buffers++; in ivtv_enqueue()
80 q->buffers--; in ivtv_dequeue()
94 from->buffers--; in ivtv_queue_move_buf()
100 to->buffers++; in ivtv_queue_move_buf()
155 steal->buffers--; in ivtv_queue_move()
159 from->buffers++; in ivtv_queue_move()
196 int SGsize = sizeof(struct ivtv_sg_host_element) * s->buffers; in ivtv_stream_alloc()
199 if (s->buffers == 0) in ivtv_stream_alloc()
204 s->name, s->buffers, s->buf_size, s->buffers * s->buf_size / 1024); in ivtv_stream_alloc()
[all …]
|
| /Linux-v4.19/drivers/scsi/isci/ |
| D | unsolicited_frame_control.c | 110 uf = &uf_control->buffers.array[i]; in sci_unsolicited_frame_control_construct()
136 *frame_header = &uf_control->buffers.array[frame_index].header->data; in sci_unsolicited_frame_control_get_header()
149 *frame_buffer = uf_control->buffers.array[frame_index].buffer; in sci_unsolicited_frame_control_get_buffer()
184 uf_control->buffers.array[frame_index].state = UNSOLICITED_FRAME_RELEASED; in sci_unsolicited_frame_control_release_frame()
198 while (uf_control->buffers.array[frame_get].state == UNSOLICITED_FRAME_RELEASED) { in sci_unsolicited_frame_control_release_frame()
199 uf_control->buffers.array[frame_get].state = UNSOLICITED_FRAME_EMPTY; in sci_unsolicited_frame_control_release_frame()
|
| /Linux-v4.19/Documentation/media/v4l-drivers/ |
| D | cafe_ccic.rst | 35 buffers until the time comes to transfer data. If this option is set,
36 then worst-case-sized buffers will be allocated at module load time.
40 - dma_buf_size: The size of DMA buffers to allocate. Note that this
41 option is only consulted for load-time allocation; when buffers are
46 buffers. Normally, the driver tries to use three buffers; on faster
49 - min_buffers: The minimum number of streaming I/O buffers that the driver
54 - max_buffers: The maximum number of streaming I/O buffers; default is
|
| /Linux-v4.19/Documentation/media/kapi/ |
| D | v4l2-videobuf.rst | 19 and user space. It handles the allocation and management of buffers for
32 Not all video devices use the same kind of buffers. In fact, there are (at
36 address spaces. (Almost) all user-space buffers are like this, but it
37 makes great sense to allocate kernel-space buffers this way as well when
43 contiguous; buffers allocated with vmalloc(), in other words. These
44 buffers are just as hard to use for DMA operations, but they can be
46 buffers are convenient.
52 Videobuf can work with all three types of buffers, but the driver author
55 [It's worth noting that there's a fourth kind of buffer: "overlay" buffers
59 benefits merit the use of this technique. Overlay buffers can be handled
[all …]
|
| /Linux-v4.19/lib/reed_solomon/ |
| D | decode_rs.c | 31 uint16_t *lambda = rsc->buffers + RS_DECODE_LAMBDA * (nroots + 1);
32 uint16_t *syn = rsc->buffers + RS_DECODE_SYN * (nroots + 1);
33 uint16_t *b = rsc->buffers + RS_DECODE_B * (nroots + 1);
34 uint16_t *t = rsc->buffers + RS_DECODE_T * (nroots + 1);
35 uint16_t *omega = rsc->buffers + RS_DECODE_OMEGA * (nroots + 1);
36 uint16_t *root = rsc->buffers + RS_DECODE_ROOT * (nroots + 1);
37 uint16_t *reg = rsc->buffers + RS_DECODE_REG * (nroots + 1);
38 uint16_t *loc = rsc->buffers + RS_DECODE_LOC * (nroots + 1);
|
| /Linux-v4.19/fs/ |
| D | splice.c | 200 while (pipe->nrbufs < pipe->buffers) { in splice_to_pipe()
201 int newbuf = (pipe->curbuf + pipe->nrbufs) & (pipe->buffers - 1); in splice_to_pipe()
237 } else if (pipe->nrbufs == pipe->buffers) { in add_to_pipe()
240 int newbuf = (pipe->curbuf + pipe->nrbufs) & (pipe->buffers - 1); in add_to_pipe()
256 unsigned int buffers = READ_ONCE(pipe->buffers); in splice_grow_spd() local
258 spd->nr_pages_max = buffers; in splice_grow_spd()
259 if (buffers <= PIPE_DEF_BUFFERS) in splice_grow_spd()
262 spd->pages = kmalloc_array(buffers, sizeof(struct page *), GFP_KERNEL); in splice_grow_spd()
263 spd->partial = kmalloc_array(buffers, sizeof(struct partial_page), in splice_grow_spd()
380 if (pipe->nrbufs == pipe->buffers) in default_file_splice_read()
[all …]
|
| D | pipe.c | 298 curbuf = (curbuf + 1) & (pipe->buffers - 1); in pipe_read()
378 (pipe->buffers - 1); in pipe_write()
409 if (bufs < pipe->buffers) { in pipe_write()
410 int newbuf = (pipe->curbuf + bufs) & (pipe->buffers-1); in pipe_write()
453 if (bufs < pipe->buffers) in pipe_write()
502 buf = (buf+1) & (pipe->buffers - 1); in pipe_ioctl()
532 mask |= (nrbufs < pipe->buffers) ? EPOLLOUT | EPOLLWRNORM : 0; in pipe_poll()
656 pipe->buffers = pipe_bufs; in alloc_pipe_info()
674 (void) account_pipe_buffers(pipe->user, pipe->buffers, 0); in free_pipe_info()
676 for (i = 0; i < pipe->buffers; i++) { in free_pipe_info()
[all …]
|
| /Linux-v4.19/kernel/trace/ |
| D | ring_buffer.c | 514 struct ring_buffer_per_cpu **buffers; member
578 cpu_buffer = buffer->buffers[cpu]; in ring_buffer_wait()
675 cpu_buffer = buffer->buffers[cpu]; in ring_buffer_poll_wait()
1385 buffer->buffers = kzalloc(ALIGN(bsize, cache_line_size()), in __ring_buffer_alloc()
1387 if (!buffer->buffers) in __ring_buffer_alloc()
1392 buffer->buffers[cpu] = rb_allocate_cpu_buffer(buffer, nr_pages, cpu); in __ring_buffer_alloc()
1393 if (!buffer->buffers[cpu]) in __ring_buffer_alloc()
1406 if (buffer->buffers[cpu]) in __ring_buffer_alloc()
1407 rb_free_cpu_buffer(buffer->buffers[cpu]); in __ring_buffer_alloc()
1409 kfree(buffer->buffers); in __ring_buffer_alloc()
[all …]
|
| /Linux-v4.19/Documentation/filesystems/ |
| D | relay.txt | 9 as a set of per-cpu kernel buffers ('channel buffers'), each
11 clients write into the channel buffers using efficient write
16 are associated with the channel buffers using the API described below.
18 The format of the data logged into the channel buffers is completely
33 sub-buffers. Messages are written to the first sub-buffer until it is
35 the next (if available). Messages are never split across sub-buffers.
57 read sub-buffers; thus in cases where read(2) is being used to drain
58 the channel buffers, special-purpose communication between kernel and
93 allowing both to convey the state of buffers (full, empty, amount of
95 consumes the read sub-buffers; thus in cases where read(2) is being
[all …]
|
| /Linux-v4.19/drivers/media/usb/pvrusb2/ |
| D | pvrusb2-io.c | 59 struct pvr2_buffer **buffers; member
315 memcpy(nb, sp->buffers, in pvr2_stream_buffer_count()
317 kfree(sp->buffers); in pvr2_stream_buffer_count()
319 sp->buffers = nb; in pvr2_stream_buffer_count()
331 sp->buffers[sp->buffer_total_count] = bp; in pvr2_stream_buffer_count()
338 bp = sp->buffers[sp->buffer_total_count - 1]; in pvr2_stream_buffer_count()
340 sp->buffers[sp->buffer_total_count - 1] = NULL; in pvr2_stream_buffer_count()
348 nb = kmemdup(sp->buffers, scnt * sizeof(*nb), in pvr2_stream_buffer_count()
352 kfree(sp->buffers); in pvr2_stream_buffer_count()
353 sp->buffers = nb; in pvr2_stream_buffer_count()
[all …]
|
| /Linux-v4.19/drivers/crypto/ccree/ |
| D | cc_hash.h | 38 u8 buffers[2][CC_MAX_HASH_BLCK_SIZE] ____cacheline_aligned; member
66 return state->buffers[state->buff_index]; in cc_hash_buf()
76 return state->buffers[state->buff_index ^ 1]; in cc_next_buf()
|
