| /linux/Documentation/driver-api/dmaengine/ |
| H A D | provider.rst | 21 will want to start a transfer, it will assert a DMA request (DRQ) by
25 parameter: the transfer size. At each clock cycle, it would transfer a
26 byte of data from one buffer to another, until the transfer size has
31 cycle. For example, we may want to transfer as much data as the
36 parameter called the transfer width.
44 transfer into smaller sub-transfers.
59 transfer, and whenever the transfer is started, the controller will go
73 transfer width and the transfer size.
118 should contain a bitmask of the supported source transfer width
121 should contain a bitmask of the supported destination transfer width
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| H A D | pxa_dma.rst | 9 A driver submitting a transfer and issuing it should be granted the transfer
11 This implies that the queuing doesn't wait for the previous transfer end,
13 triggered by the end of the transfer.
14 A transfer which is submitted and issued on a phy doesn't wait for a phy to
17 a new transfer.
20 Any issued transfer with DMA_PREP_INTERRUPT should trigger a callback call.
27 multimedia case, such as video capture, if a transfer is submitted and then
28 a check of the DMA channel reports a "stopped channel", the transfer should
44 assigned on the fly when the transfer is issued.
46 b) Transfer anatomy for a scatter-gather transfer
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| H A D | client.rst | 95 setting the DMA_PREP_REPEAT transfer flag.
97 A non-NULL return of this transfer API represents a "descriptor" for
189 after their transfer completion callback has run for the descriptor.
190 If no completion callback has been defined for the transfer, then the
192 In other words: if the aim is to read back metadata after the transfer is
220 3. submit the transfer
227 3. submit the transfer
228 4. when the transfer is completed, the metadata should be available in the
241 5. submit the transfer
246 2. submit the transfer
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| /linux/drivers/net/ethernet/qualcomm/ |
| H A D | qca_7k.c | 33 struct spi_transfer transfer[2]; in qcaspi_read_register() local
37 memset(transfer, 0, sizeof(transfer)); in qcaspi_read_register()
44 transfer[0].tx_buf = &tx_data; in qcaspi_read_register()
45 transfer[0].len = QCASPI_CMD_LEN; in qcaspi_read_register()
46 transfer[1].rx_buf = &rx_data; in qcaspi_read_register()
47 transfer[1].len = QCASPI_CMD_LEN; in qcaspi_read_register()
49 spi_message_add_tail(&transfer[0], &msg); in qcaspi_read_register()
55 spi_message_add_tail(&transfer[1], &msg); in qcaspi_read_register()
73 struct spi_transfer transfer[2]; in __qcaspi_write_register() local
77 memset(&transfer, 0, sizeof(transfer)); in __qcaspi_write_register()
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| H A D | qca_spi.c | 98 struct spi_transfer transfer[2]; in qcaspi_write_burst() local
101 memset(&transfer, 0, sizeof(transfer)); in qcaspi_write_burst()
105 transfer[0].tx_buf = &cmd; in qcaspi_write_burst()
106 transfer[0].len = QCASPI_CMD_LEN; in qcaspi_write_burst()
107 transfer[1].tx_buf = src; in qcaspi_write_burst()
108 transfer[1].len = len; in qcaspi_write_burst()
110 spi_message_add_tail(&transfer[0], &msg); in qcaspi_write_burst()
111 spi_message_add_tail(&transfer[1], &msg); in qcaspi_write_burst()
126 struct spi_transfer transfer; in qcaspi_write_legacy() local
129 memset(&transfer, 0, sizeof(transfer)); in qcaspi_write_legacy()
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| /linux/include/linux/spi/ |
| H A D | sh_msiof.h | 28 #define SIMDR1_TRMD BIT(31) /* Transfer Mode (1 = Master mode) */
40 #define SITMDR1_PCON BIT(30) /* Transfer Signal Connection */
80 #define SIFCTR_TFWM_64 0U /* Transfer Request when 64 empty stages */
81 #define SIFCTR_TFWM_32 1U /* Transfer Request when 32 empty stages */
82 #define SIFCTR_TFWM_24 2U /* Transfer Request when 24 empty stages */
83 #define SIFCTR_TFWM_16 3U /* Transfer Request when 16 empty stages */
84 #define SIFCTR_TFWM_12 4U /* Transfer Request when 12 empty stages */
85 #define SIFCTR_TFWM_8 5U /* Transfer Request when 8 empty stages */
86 #define SIFCTR_TFWM_4 6U /* Transfer Request when 4 empty stages */
87 #define SIFCTR_TFWM_1 7U /* Transfer Request when 1 empty stage */
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| H A D | spi.h | 64 * transfer bytes histogram
138 * The spi_transfer.speed_hz can override this for each transfer.
144 * The spi_transfer.bits_per_word can override this for each transfer.
150 * each word in a transfer (by specifying SPI_LSB_FIRST).
165 * words of a transfer
409 * supported. If set, the SPI core will reject any transfer with an
412 * @min_speed_hz: Lowest supported transfer speed
413 * @max_speed_hz: Highest supported transfer speed
418 * @max_transfer_size: function that returns the max transfer size for
435 * @transfer
681 int (*transfer)(struct spi_device *spi, global() member
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| /linux/drivers/mtd/devices/ |
| H A D | mchp23k256.c | 64 struct spi_transfer transfer[2] = {}; in mchp23k256_write() local
76 transfer[0].tx_buf = command; in mchp23k256_write()
77 transfer[0].len = cmd_len; in mchp23k256_write()
78 spi_message_add_tail(&transfer[0], &message); in mchp23k256_write()
80 transfer[1].tx_buf = buf; in mchp23k256_write()
81 transfer[1].len = len; in mchp23k256_write()
82 spi_message_add_tail(&transfer[1], &message); in mchp23k256_write()
103 struct spi_transfer transfer[2] = {}; in mchp23k256_read() local
112 memset(&transfer, 0, sizeof(transfer)); in mchp23k256_read()
116 transfer[0].tx_buf = command; in mchp23k256_read()
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| /linux/Documentation/mhi/ |
| H A D | mhi.rst | 58 Transfer rings: Used by the host to schedule work items for a channel. The
59 transfer rings are organized as a circular queue of Transfer Descriptors (TD).
81 Two unidirectional channels with their associated transfer rings form a
85 transfer ring.
87 Transfer rings
91 Transfer Descriptors (TD). TDs are managed through transfer rings, which are
93 memory. TDs consist of one or more ring elements (or transfer blocks)::
101 Below is the basic usage of transfer rings:
103 * Host allocates memory for transfer ring.
118 data transfer completion status, command completion status, and state changes
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| /linux/drivers/net/wireless/ralink/rt2x00/ |
| H A D | rt2x00crypto.c | 152 unsigned int transfer = 0; in rt2x00crypto_rx_insert_iv() local
194 memmove(skb->data + transfer, in rt2x00crypto_rx_insert_iv()
195 skb->data + transfer + (iv_len - align), in rt2x00crypto_rx_insert_iv()
197 transfer += header_length; in rt2x00crypto_rx_insert_iv()
203 memmove(skb->data + transfer, in rt2x00crypto_rx_insert_iv()
204 skb->data + transfer + iv_len + align, in rt2x00crypto_rx_insert_iv()
206 transfer += header_length; in rt2x00crypto_rx_insert_iv()
210 memcpy(skb->data + transfer, rxdesc->iv, iv_len); in rt2x00crypto_rx_insert_iv()
211 transfer += iv_len; in rt2x00crypto_rx_insert_iv()
218 memmove(skb->data + transfer, in rt2x00crypto_rx_insert_iv()
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| /linux/drivers/spi/ |
| H A D | spi-mpc52xx.c | 84 /* Details of current transfer (length, and buffer pointers) */
86 struct spi_transfer *transfer; /* current transfer */ member
113 * Start a new transfer. This is called both by the idle state
114 * for the first transfer in a message, and by the wait state when the
115 * previous transfer in a message is complete.
119 ms->rx_buf = ms->transfer->rx_buf; in mpc52xx_spi_start_transfer()
120 ms->tx_buf = ms->transfer->tx_buf; in mpc52xx_spi_start_transfer()
121 ms->len = ms->transfer->len; in mpc52xx_spi_start_transfer()
126 ms->cs_change = ms->transfer->cs_change; in mpc52xx_spi_start_transfer()
145 * No transfers are in progress; if another transfer is pending then retrieve
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| H A D | spi-cadence.c | 110 * @tx_bytes: Number of bytes left to transfer
245 * @transfer: Pointer to the spi_transfer structure which provides
246 * information about next transfer setup parameters
251 * is lower than the requested frequency (maximum lower) for the transfer. If
257 struct spi_transfer *transfer) in cdns_spi_config_clock_freq() argument
268 if (xspi->speed_hz != transfer->speed_hz) { in cdns_spi_config_clock_freq()
272 (frequency / (2 << baud_rate_val)) > transfer->speed_hz) in cdns_spi_config_clock_freq()
284 * cdns_spi_setup_transfer - Configure SPI controller for specified transfer
286 * @transfer: Pointer to the spi_transfer structure which provides
287 * information about next transfer setup parameters
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| H A D | spi-stm32.c | 264 * @transfer_one_dma_start: routine to start transfer a single spi_transfer
315 * @t_size_max: maximum number of data of one transfer
323 * @cur_xferlen: current transfer length in bytes
324 * @cur_usedma: boolean to know if dma is used in current transfer
329 * @dma_tx: dma channel for TX transfer
330 * @dma_rx: dma channel for RX transfer
334 * @sram_rx_buf_size: size of SRAM buffer for RX transfer
335 * @sram_rx_buf: SRAM buffer for RX transfer
336 * @sram_dma_rx_buf: SRAM buffer physical address for RX transfer
337 * @mdma_rx: MDMA channel for RX transfer
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| /linux/Documentation/userspace-api/media/v4l/ |
| H A D | colorspaces-details.rst | 14 PAL and by SDTV in general. The default transfer function is
45 The transfer function defined for SMPTE 170M is the same as the one
56 Inverse Transfer function:
92 general. The default transfer function is ``V4L2_XFER_FUNC_709``. The
121 Transfer function. Normally L is in the range [0…1], but for the
132 Inverse Transfer function:
209 and computer graphics. The default transfer function is
244 Transfer function. Note that negative values for L are only used by the
255 Inverse Transfer function:
287 graphics that use the opRGB colorspace. The default transfer function is
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| H A D | colorspaces-defs.rst | 9 which defines the chromaticities, the default transfer function, the
11 is the transfer function identifier (enum
13 transfer functions. The third is the Y'CbCr encoding identifier (enum
80 .. flat-table:: V4L2 Transfer Function
87 - Use the default transfer function as defined by the colorspace.
89 - Use the Rec. 709 transfer function.
91 - Use the sRGB transfer function.
93 - Use the opRGB transfer function.
95 - Use the SMPTE 240M transfer function.
97 - Do not use a transfer function (i.e. use linear RGB values).
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| /linux/sound/core/ |
| H A D | isadma.c | 19 * snd_dma_program - program an ISA DMA transfer
22 * @size: the DMA transfer size
23 * @mode: the DMA transfer mode, DMA_MODE_XXX
25 * Programs an ISA DMA transfer for the given buffer.
46 * snd_dma_disable - stop the ISA DMA transfer
49 * Stops the ISA DMA transfer.
63 * snd_dma_pointer - return the current pointer to DMA transfer buffer in bytes
65 * @size: the dma transfer size
67 * Return: The current pointer in DMA transfer buffer in bytes.
92 …pr_err("ALSA: pointer (0x%x) for DMA #%ld is greater than transfer size (0x%x)\n", result, dma, si… in snd_dma_pointer()
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| /linux/Documentation/arch/arm/stm32/ |
| H A D | stm32-dma-mdma-chaining.rst | 30 without the ability to generate convenient burst transfer ensuring the best
54 the STM32 DMA transfer.
58 channel is null. The channel transfer complete of the last node is the end of
59 transfer, unless first and last nodes are linked to each other, in such a
60 case, the linked-list loops on to create a circular MDMA transfer.
64 resources and bus congestion. Transfer Complete signal of STM32 DMA channel
65 can triggers STM32 MDMA transfer. STM32 MDMA can clear the request generated
73 | channels | channels | Transfer | request |
133 * the address of the STM32 DMA register to clear the Transfer Complete
135 * the mask of the Transfer Complete interrupt flag of the STM32 DMA channel.
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| /linux/drivers/usb/dwc2/ |
| H A D | hcd.h | 48 * @xfer_buf: Pointer to current transfer buffer position
52 * @xfer_len: Total number of bytes to transfer
54 * @start_pkt_count: Packet count at start of transfer
55 * @xfer_started: True if the transfer has been started
74 * assigned to the current transfer (not counting PINGs)
76 * @ntd: Number of transfer descriptors for the transfer
79 * @qh: QH for the transfer being processed by this channel
86 * host mode. It contains the data items needed to transfer packets to an
213 * struct dwc2_hs_transfer_time - Info about a transfer on the high speed bus.
220 * @duration_us: How long this transfer goes.
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| /linux/drivers/scsi/ |
| H A D | dc395x.h | 250 #define SCSIXFERDONE 0x0800 /* SCSI SCSI transfer done */
251 #define SCSIXFERCNT_2_ZERO 0x0100 /* SCSI SCSI transfer count to zero */
273 #define DO_CLRFIFO 0x0004 /* Clear SCSI transfer FIFO */
319 /* transfer. */
325 /* are used to transfer data */
330 /* are used to transfer data */
333 /* 02-00 0 PERIOD[2:0]/ Synchronous SCSI Transfer Rate. */
335 /* the Synchronous SCSI Transfer */
381 #define TRM_S1040_SCSI_COUNTER 0x88 /* SCSI Transfer Counter 24bits(R/W) */
413 #define SCMD_FIFO_OUT 0xC0 /* SCSI FIFO transfer out */
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| /linux/drivers/usb/image/ |
| H A D | microtek.c | 78 * 20000515 Put transfer context and URB in mts_desc (john)
191 MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
192 …status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)t…
208 struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
361 static void mts_transfer_cleanup( struct urb *transfer );
362 static void mts_do_sg(struct urb * transfer);
365 void mts_int_submit_urb (struct urb* transfer, in mts_int_submit_urb() argument
372 /* Holding transfer->context->lock! */ in mts_int_submit_urb()
378 usb_fill_bulk_urb(transfer, in mts_int_submit_urb()
387 res = usb_submit_urb( transfer, GFP_ATOMIC ); in mts_int_submit_urb()
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| /linux/Documentation/devicetree/bindings/dma/stm32/ |
| H A D | st,stm32-mdma.yaml | 24 0x2: Source address pointer is incremented after each data transfer
25 0x3: Source address pointer is decremented after each data transfer
28 0x2: Destination address pointer is incremented after each data transfer
29 0x3: Destination address pointer is decremented after each data transfer
40 -bit 25-18: The number of bytes to be transferred in a single transfer
43 0x00: Each MDMA request triggers a buffer transfer (max 128 bytes)
44 0x1: Each MDMA request triggers a block transfer (max 64K bytes)
45 0x2: Each MDMA request triggers a repeated block transfer
46 0x3: Each MDMA request triggers a linked list transfer
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| /linux/drivers/i3c/master/mipi-i3c-hci/ |
| H A D | xfer_mode_rate.h | 7 * Transfer Mode/Rate Table definitions as found in extended capability
16 * Master Transfer Mode Table Fixed Indexes.
29 * Transfer Mode Table Entry Bits Definitions
38 * Master Data Transfer Rate Selector Values.
44 * Data Transfer Rate Table. Indicated are typical rates. The actual
45 * rates may vary slightly and are also specified in the Data Transfer
67 * Master Data Transfer Rate Table Mode ID values.
73 * Master Data Transfer Rate Table Entry Bits Definitions
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| /linux/arch/sh/drivers/pci/ |
| H A D | pci-sh4.h | 59 #define SH4_PCICLR_MDMA0 0x40000000 /* DMA0 Transfer Error */
60 #define SH4_PCICLR_MDMA1 0x20000000 /* DMA1 Transfer Error */
61 #define SH4_PCICLR_MDMA2 0x10000000 /* DMA2 Transfer Error */
62 #define SH4_PCICLR_MDMA3 0x08000000 /* DMA3 Transfer Error */
63 #define SH4_PCICLR_TGT 0x04000000 /* Target Transfer Error */
80 #define SH4_PCIDMABT 0x140 /* DMA Transfer Arb. Register */
82 #define SH4_PCIDPA0 0x180 /* DMA0 Transfer Addr. */
84 #define SH4_PCIDTC0 0x188 /* DMA0 Transfer Cnt. */
93 #define SH4_PCIDCR_DIR 0x00000004 /* DMA Transfer Direction */
96 #define SH4_PCIDPA1 0x190 /* DMA1 Transfer Addr. */
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| /linux/include/linux/ |
| H A D | atmel_pdc.h | 24 #define ATMEL_PDC_PTCR 0x120 /* Transfer Control Register */
25 #define ATMEL_PDC_RXTEN (1 << 0) /* Receiver Transfer Enable */
26 #define ATMEL_PDC_RXTDIS (1 << 1) /* Receiver Transfer Disable */
27 #define ATMEL_PDC_TXTEN (1 << 8) /* Transmitter Transfer Enable */
28 #define ATMEL_PDC_TXTDIS (1 << 9) /* Transmitter Transfer Disable */
30 #define ATMEL_PDC_PTSR 0x124 /* Transfer Status Register */
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| /linux/drivers/mmc/core/ |
| H A D | sdio_io.c | 147 * data transfer use the optimal (least) number of commands.
187 * Calculate the maximum byte mode transfer size
220 * sdio_align_size - pads a transfer size to a more optimal value
222 * @sz: original transfer size
249 * If we can still do this with just a byte transfer, then in sdio_align_size()
257 * Check if the transfer is already block aligned in sdio_align_size()
313 /* Split an arbitrarily sized data transfer into several
325 /* Do the bulk of the transfer using block mode (if supported). */ in sdio_io_rw_ext_helper()
327 /* Blocks per command is limited by host count, host transfer in sdio_io_rw_ext_helper()
374 * @err_ret: optional status value from transfer
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