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/linux-5.10/Documentation/driver-api/dmaengine/
Dprovider.rst21 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
[all …]
Dpxa_dma.rst9 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
[all …]
Dclient.rst91 setting the DMA_PREP_REPEAT transfer flag.
93 A non-NULL return of this transfer API represents a "descriptor" for
178 after their transfer completion callback has run for the descriptor.
179 If no completion callback has been defined for the transfer, then the
181 In other words: if the aim is to read back metadata after the transfer is
209 3. submit the transfer
216 3. submit the transfer
217 4. when the transfer is completed, the metadata should be available in the
230 5. submit the transfer
235 2. submit the transfer
[all …]
/linux-5.10/drivers/net/ethernet/qualcomm/
Dqca_7k.c48 struct spi_transfer transfer[2]; in qcaspi_read_register() local
52 memset(transfer, 0, sizeof(transfer)); in qcaspi_read_register()
59 transfer[0].tx_buf = &tx_data; in qcaspi_read_register()
60 transfer[0].len = QCASPI_CMD_LEN; in qcaspi_read_register()
61 transfer[1].rx_buf = &rx_data; in qcaspi_read_register()
62 transfer[1].len = QCASPI_CMD_LEN; in qcaspi_read_register()
64 spi_message_add_tail(&transfer[0], &msg); in qcaspi_read_register()
70 spi_message_add_tail(&transfer[1], &msg); in qcaspi_read_register()
88 struct spi_transfer transfer[2]; in __qcaspi_write_register() local
92 memset(&transfer, 0, sizeof(transfer)); in __qcaspi_write_register()
[all …]
Dqca_spi.c109 struct spi_transfer transfer[2]; in qcaspi_write_burst() local
112 memset(&transfer, 0, sizeof(transfer)); in qcaspi_write_burst()
116 transfer[0].tx_buf = &cmd; in qcaspi_write_burst()
117 transfer[0].len = QCASPI_CMD_LEN; in qcaspi_write_burst()
118 transfer[1].tx_buf = src; in qcaspi_write_burst()
119 transfer[1].len = len; in qcaspi_write_burst()
121 spi_message_add_tail(&transfer[0], &msg); in qcaspi_write_burst()
122 spi_message_add_tail(&transfer[1], &msg); in qcaspi_write_burst()
137 struct spi_transfer transfer; in qcaspi_write_legacy() local
140 memset(&transfer, 0, sizeof(transfer)); in qcaspi_write_legacy()
[all …]
/linux-5.10/drivers/mtd/devices/
Dmchp23k256.c64 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()
[all …]
/linux-5.10/drivers/staging/kpc2000/
Dkpc2000_spi.c140 unsigned int eo : 1; /* End of Transfer */
205 kp_spi_txrx_pio(struct spi_device *spidev, struct spi_transfer *transfer) in kp_spi_txrx_pio() argument
208 unsigned int count = transfer->len; in kp_spi_txrx_pio()
213 u8 *rx = transfer->rx_buf; in kp_spi_txrx_pio()
214 const u8 *tx = transfer->tx_buf; in kp_spi_txrx_pio()
292 struct spi_transfer *transfer; in kp_spi_transfer_one_message() local
308 list_for_each_entry(transfer, &m->transfers, transfer_list) { in kp_spi_transfer_one_message()
309 const void *tx_buf = transfer->tx_buf; in kp_spi_transfer_one_message()
310 void *rx_buf = transfer->rx_buf; in kp_spi_transfer_one_message()
311 unsigned int len = transfer->len; in kp_spi_transfer_one_message()
[all …]
/linux-5.10/Documentation/mhi/
Dmhi.rst58 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
[all …]
/linux-5.10/drivers/staging/greybus/tools/
DREADME.loopback27 size - payload size of the transfer.
35 3 - transfer
79 -t must be one of the test names - sink, transfer or ping
102 * Run a 1000 transfers of a 100 byte packet. Each transfer is started only
148 * Run a transfer test 10 iterations of size 100 bytes on all available devices
149 #/loopback_test -t transfer -i 10 -s 100
150 …1970-1-1 0:10:7,transfer,1-4.17,100,10,0,443,509,471.700012,66,1963,2256,2124.600098,293,102776,11…
151 …1970-1-1 0:10:7,transfer,1-5.17,100,10,0,399,542,463.399994,143,1845,2505,2175.800049,660,92568,12…
155 #/loopback_test -t transfer -i 10 -s 100 -a
156 …1970-1-1 0:10:35,transfer,1-4.17,100,10,0,448,580,494.100006,132,1722,2230,2039.400024,508,103936,…
[all …]
/linux-5.10/sound/core/
Disadma.c19 * 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()
/linux-5.10/drivers/spi/
Dspi-stm32.c229 * @can_dma: routine to determine if the transfer is eligible for DMA use
230 * @transfer_one_dma_start: routine to start transfer a single spi_transfer
240 * @has_startbit: boolean to know if start bit is used to start transfer
280 * @cur_xferlen: current transfer length in bytes
281 * @cur_usedma: boolean to know if dma is used in current transfer
286 * @dma_tx: dma channel for TX transfer
287 * @dma_rx: dma channel for RX transfer
335 /* SPI data transfer is enabled but spi_ker_ck is idle.
481 /* data_packet should not exceed transfer length */ in stm32h7_spi_prepare_fthlv()
716 * complete the transfer from an hardware point of view.
[all …]
Dspi-fsi.c266 struct spi_transfer *transfer) in fsi_spi_sequence_transfer() argument
273 u8 len = min(transfer->len, 8U); in fsi_spi_sequence_transfer()
274 u8 rem = transfer->len % len; in fsi_spi_sequence_transfer()
277 loops = transfer->len / len; in fsi_spi_sequence_transfer()
279 if (transfer->tx_buf) { in fsi_spi_sequence_transfer()
285 } else if (transfer->rx_buf) { in fsi_spi_sequence_transfer()
317 if (transfer->rx_buf) in fsi_spi_sequence_transfer()
337 struct spi_transfer *transfer) in fsi_spi_transfer_data() argument
343 if (transfer->tx_buf) { in fsi_spi_transfer_data()
347 const u8 *tx = transfer->tx_buf; in fsi_spi_transfer_data()
[all …]
Dspi-cadence.c109 * @tx_bytes: Number of bytes left to transfer
235 * @transfer: Pointer to the spi_transfer structure which provides
236 * information about next transfer setup parameters
241 * is lower than the requested frequency (maximum lower) for the transfer. If
247 struct spi_transfer *transfer) in cdns_spi_config_clock_freq() argument
258 if (xspi->speed_hz != transfer->speed_hz) { in cdns_spi_config_clock_freq()
262 (frequency / (2 << baud_rate_val)) > transfer->speed_hz) in cdns_spi_config_clock_freq()
274 * cdns_spi_setup_transfer - Configure SPI controller for specified transfer
276 * @transfer: Pointer to the spi_transfer structure which provides
277 * information about next transfer setup parameters
[all …]
Dspi-mpc52xx.c79 /* Details of current transfer (length, and buffer pointers) */
81 struct spi_transfer *transfer; /* current transfer */ member
107 * Start a new transfer. This is called both by the idle state
108 * for the first transfer in a message, and by the wait state when the
109 * previous transfer in a message is complete.
113 ms->rx_buf = ms->transfer->rx_buf; in mpc52xx_spi_start_transfer()
114 ms->tx_buf = ms->transfer->tx_buf; in mpc52xx_spi_start_transfer()
115 ms->len = ms->transfer->len; in mpc52xx_spi_start_transfer()
120 ms->cs_change = ms->transfer->cs_change; in mpc52xx_spi_start_transfer()
139 * No transfers are in progress; if another transfer is pending then retrieve
[all …]
/linux-5.10/drivers/net/wireless/ralink/rt2x00/
Drt2x00crypto.c152 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()
206 memmove(skb->data + transfer, in rt2x00crypto_rx_insert_iv()
207 skb->data + transfer + iv_len + align, in rt2x00crypto_rx_insert_iv()
209 transfer += header_length; in rt2x00crypto_rx_insert_iv()
213 memcpy(skb->data + transfer, rxdesc->iv, iv_len); in rt2x00crypto_rx_insert_iv()
214 transfer += iv_len; in rt2x00crypto_rx_insert_iv()
221 memmove(skb->data + transfer, in rt2x00crypto_rx_insert_iv()
[all …]
/linux-5.10/Documentation/userspace-api/media/v4l/
Dcolorspaces-details.rst14 PAL and by SDTV in general. The default transfer function is
49 The transfer function defined for SMPTE 170M is the same as the one
60 Inverse Transfer function:
96 general. The default transfer function is ``V4L2_XFER_FUNC_709``. The
129 Transfer function. Normally L is in the range [0…1], but for the
140 Inverse Transfer function:
217 and computer graphics. The default transfer function is
256 Transfer function. Note that negative values for L are only used by the
267 Inverse Transfer function:
299 graphics that use the opRGB colorspace. The default transfer function is
[all …]
Dcolorspaces-defs.rst9 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).
[all …]
/linux-5.10/include/linux/spi/
Dspi.h50 * transfer bytes histogramm
116 * The spi_transfer.speed_hz can override this for each transfer.
122 * each word in a transfer (by specifying SPI_LSB_FIRST).
128 * The spi_transfer.bits_per_word can override this for each transfer.
146 * words of a transfer
335 * supported. If set, the SPI core will reject any transfer with an
338 * @min_speed_hz: Lowest supported transfer speed
339 * @max_speed_hz: Highest supported transfer speed
342 * @max_transfer_size: function that returns the max transfer size for
358 * @transfer: adds a message to the controller's transfer queue.
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/linux-5.10/drivers/usb/dwc2/
Dhcd.h77 * @xfer_buf: Pointer to current transfer buffer position
81 * @xfer_len: Total number of bytes to transfer
83 * @start_pkt_count: Packet count at start of transfer
84 * @xfer_started: True if the transfer has been started
103 * assigned to the current transfer (not counting PINGs)
105 * @ntd: Number of transfer descriptors for the transfer
108 * @qh: QH for the transfer being processed by this channel
115 * host mode. It contains the data items needed to transfer packets to an
242 * struct dwc2_hs_transfer_time - Info about a transfer on the high speed bus.
249 * @duration_us: How long this transfer goes.
[all …]
/linux-5.10/Documentation/devicetree/bindings/dma/
Dst,stm32-mdma.yaml24 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
/linux-5.10/drivers/scsi/
Ddc395x.h288 #define SCSIXFERDONE 0x0800 /* SCSI SCSI transfer done */
289 #define SCSIXFERCNT_2_ZERO 0x0100 /* SCSI SCSI transfer count to zero */
311 #define DO_CLRFIFO 0x0004 /* Clear SCSI transfer FIFO */
357 /* transfer. */
363 /* are used to transfer data */
368 /* are used to transfer data */
371 /* 02-00 0 PERIOD[2:0]/ Synchronous SCSI Transfer Rate. */
373 /* the Synchronous SCSI Transfer */
419 #define TRM_S1040_SCSI_COUNTER 0x88 /* SCSI Transfer Counter 24bits(R/W) */
451 #define SCMD_FIFO_OUT 0xC0 /* SCSI FIFO transfer out */
[all …]
/linux-5.10/drivers/usb/image/
Dmicrotek.c78 * 20000515 Put transfer context and URB in mts_desc (john)
187 MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
188 …status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)t…
204 struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
363 static void mts_transfer_cleanup( struct urb *transfer );
364 static void mts_do_sg(struct urb * transfer);
367 void mts_int_submit_urb (struct urb* transfer, in mts_int_submit_urb() argument
374 /* Holding transfer->context->lock! */ in mts_int_submit_urb()
380 usb_fill_bulk_urb(transfer, in mts_int_submit_urb()
389 res = usb_submit_urb( transfer, GFP_ATOMIC ); in mts_int_submit_urb()
[all …]
/linux-5.10/drivers/dma/
Dcoh901318.h29 * @src_addr: transfer source address
30 * @dst_addr: transfer destination address
88 * @size: transfer size
101 * coh901318_lli_fill_single() - Prepares the lli:s for dma single transfer
104 * @buf: transfer buffer
105 * @size: transfer size
109 * @dir: direction of transfer (to or from device)
120 * coh901318_lli_fill_single() - Prepares the lli:s for dma scatter list transfer
129 * @dir: direction of transfer (to or from device)
/linux-5.10/arch/sh/drivers/pci/
Dpci-sh4.h59 #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. */
[all …]
/linux-5.10/include/linux/
Datmel_pdc.h24 #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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