| /linux/Documentation/core-api/ |
| H A D | circular-buffers.rst | 2 Circular Buffers
9 Linux provides a number of features that can be used to implement circular
25 (*) What is a circular buffer?
29 (*) Using memory barriers with circular buffers.
35 What is a circular buffer?
38 First of all, what is a circular buffer? A circular buffer is a buffer of
67 circular buffer would normally be a slow operation, requiring the use of a
71 Linux provides a set of macros for handling power-of-2 circular buffers. These
134 Using memory barriers with circular buffers
137 By using memory barriers in conjunction with circular buffers, you can avoid
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| /linux/drivers/gpu/drm/msm/disp/dpu1/ |
| H A D | dpu_hw_util.h | 101 * 0x4 update y circular filter LUT
102 * 0x8 update uv circular filter LUT
106 * @ y_rgb_cir_lut_idx: y circular filter LUT index
107 * @ uv_cir_lut_idx: uv circular filter LUT index
108 * @ y_rgb_sep_lut_idx: y circular filter LUT index
111 * @ cir_lut: pointer to circular filter LUT
254 * @y_rgb_cir_lut_idx: Y/RGB circular LUT index
255 * @uv_cir_lut_idx: UV circular LUT index
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| /linux/kernel/irq/ |
| H A D | timings.c | 40 * Currently, the interrupt timings are stored in a circular array
55 * where the interrupts are disabled and the circular buffer
59 * At this point, we read the circular buffer and we fill the irq
60 * related statistics structure. After this step, the circular array
130 * Store the index in a circular buffer
273 * Number of elements in the circular buffer: If it happens it was
277 * wrap. That could be done in a nicer way with the proper circular
407 * 'count' will depends if the circular buffer wrapped or not in __irq_timings_next_event()
416 * Copy the content of the circular buffer into another buffer in __irq_timings_next_event()
463 * circular array. in __irq_timings_store()
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| /linux/drivers/misc/mei/ |
| H A D | hw-me-regs.h | 147 /* H_CB_WW - Host Circular Buffer (CB) Write Window register */
151 /* ME_CB_RW - ME Circular Buffer Read Window register (read only) */
166 /* Host Circular Buffer Depth - maximum number of 32-bit entries in CB */
168 /* Host Circular Buffer Write Pointer */
170 /* Host Circular Buffer Read Pointer */
192 /* ME CB (Circular Buffer) Depth HRA (Host Read Access) - host read only
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| /linux/include/media/ |
| H A D | demux.h | 206 * Any TS packets that match the filter settings are copied to a circular
210 * addresses within the circular buffer, but other implementations are also
215 * the start of the first undelivered TS packet within a circular buffer.
217 * TS packets have crossed the last address of the circular buffer and
219 * parameter would contain an address within the circular buffer, while the
220 * @buffer2 parameter would contain the first address of the circular buffer.
233 * is possible that the circular buffer eventually fills up. If this happens,
260 * within the circular buffer of the demux driver.
265 * circular buffer.
286 * implementation should maintain a circular buffer for received sections.
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| /linux/drivers/md/dm-vdo/ |
| H A D | wait-queue.c | 27 * The waitq is empty, so form the initial circular list by self-linking the in vdo_waitq_enqueue_waiter()
57 * Both are non-empty. Splice the two circular lists together in vdo_waitq_transfer_all_waiters()
115 /* The waitq is circular, so the last entry links to the head of the waitq. */ in vdo_waitq_get_first_waiter()
168 * of the circular waitq. in vdo_waitq_dequeue_waiter()
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| H A D | wait-queue.h | 13 * A vdo_wait_queue is a circular singly linked list of entries waiting to be notified
14 * of a change in a condition. Keeping a circular list allows the vdo_wait_queue
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| /linux/drivers/misc/ibmasm/ |
| H A D | event.c | 23 * circular buffer.
38 * Store the event in the circular event buffer, wake up any sleeping
52 /* copy the event into the next slot in the circular buffer */ in ibmasm_receive_event()
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| /linux/include/rdma/ |
| H A D | rdmavt_cq.h | 21 * when reading indice of circular buffer that mmaped to user space.
27 * when writing indice of circular buffer that mmaped to user space.
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| /linux/drivers/net/wireless/intel/iwlegacy/ |
| H A D | 4965.h | 862 * up to 7 DMA channels (FIFOs). Each Tx queue is supported by a circular array
948 * TFD Circular Buffers Base (CBBC) addresses
951 * circular buffers (CBs/queues) containing Transmit Frame Descriptors (TFDs)
953 * bytes from one another. Each TFD circular buffer in DRAM must be 256-byte
979 * 1) Receive Buffer Descriptor (RBD) circular buffer (CB), typically with 256
989 * Driver sets physical address [35:8] of base of RBD circular buffer
994 * the RB's corresponding RBD within the circular buffer. Driver sets
1004 * enter pointers to these RBs into contiguous RBD circular buffer entries,
1010 * the circular buffer. This value should initially be 0 (before preparing any
1012 * wrap back to 0 at the end of the circular buffer (but don't wrap before
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| /linux/include/drm/ |
| H A D | drm_debugfs_crc.h | 54 * @head: head of circular queue
55 * @tail: tail of circular queue
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| /linux/Documentation/networking/ |
| H A D | packet_mmap.rst | 34 configurable circular buffer mapped in user space that can be used to either
68 setsockopt() ---> allocation of the circular buffer (ring)
97 See "Mapping and use of the circular buffer (ring)".
100 also the mapping of the circular buffer in the user process and
108 setsockopt() ---> allocation of the circular buffer (ring)
134 know the header size of frames used in the circular buffer.
212 circular buffer (ring) of unswappable memory.
248 account when choosing the frame_size. See "Mapping and use of the circular
403 Mapping and use of the circular buffer (ring)
407 mmap function. Even the circular buffer is compound of several physically
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| /linux/net/dccp/ccids/lib/ |
| H A D | packet_history.h | |
| /linux/net/dccp/ |
| H A D | ackvec.h | |
| /linux/drivers/media/platform/st/sti/delta/ |
| H A D | delta-mjpeg-fw.h | 146 * @circular_buffer_begin_addr_p: start address of fw circular buffer
147 * @circular_buffer_end_addr_p: end address of fw circular buffer
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| /linux/scripts/kconfig/tests/preprocess/circular_expansion/ |
| H A D | __init__.py | 3 Detect circular variable expansion.
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| /linux/include/linux/ |
| H A D | irqhandler.h | 6 * Interrupt flow handler typedefs are defined here to avoid circular
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| /linux/drivers/input/serio/ |
| H A D | ams_delta_serio.c | 14 * The resulting words are fetched by this driver from a circular buffer.
74 * Read data from the circular buffer, check it in ams_delta_serio_interrupt()
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| /linux/drivers/gpu/drm/i915/ |
| H A D | i915_perf_types.h | 257 * check for data in the circular OA buffer for notifying userspace
264 * sees data ready to read in the circular OA buffer.
393 * @read: Copy data from the circular OA buffer into a given userspace
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| /linux/drivers/net/wireless/marvell/mwifiex/ |
| H A D | 11n_rxreorder.c | 94 * circular buffer.
121 * We don't have a circular buffer, hence use rotation to simulate in mwifiex_11n_dispatch_pkt_until_start_win()
122 * circular buffer in mwifiex_11n_dispatch_pkt_until_start_win()
142 * circular buffer.
164 * We don't have a circular buffer, hence use rotation to simulate in mwifiex_11n_scan_and_dispatch()
165 * circular buffer in mwifiex_11n_scan_and_dispatch()
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| /linux/drivers/mtd/ |
| H A D | Kconfig | 172 This enables panic and oops messages to be logged to a circular
180 This enables panic and oops messages to be logged to a circular
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| /linux/drivers/platform/chrome/wilco_ec/ |
| H A D | event.c | 21 * circular buffer of size 64, so if there are no userspace consumers
69 /* Size of circular queue of events. */
88 * struct ec_event_queue - Circular queue for events.
173 * @events: Circular queue of EC events to be provided to userspace.
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| /linux/drivers/tty/ |
| H A D | ehv_bytechan.c | 40 /* The size of the transmit circular buffer. This must be a power of two. */
52 u8 buf[BUF_SIZE]; /* transmit circular buffer */
53 unsigned int head; /* circular buffer head */
54 unsigned int tail; /* circular buffer tail */
463 * the data first in a circular buffer, and then dequeue as much of that data
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| /linux/Documentation/userspace-api/media/dvb/ |
| H A D | dmx-set-buffer-size.rst | 34 This ioctl call is used to set the size of the circular buffer used for
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| /linux/drivers/staging/media/ipu3/ |
| H A D | ipu3-css-pool.h | 28 * struct imgu_css_pool - circular buffer pool definition
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