/** * enum dma_transaction_type - DMA transaction types/indexes * * Note: The DMA_ASYNC_TX capability is not to be set by drivers. It is * automatically set as dma devices are registered.
*/ enum dma_transaction_type {
DMA_MEMCPY,
DMA_XOR,
DMA_PQ,
DMA_XOR_VAL,
DMA_PQ_VAL,
DMA_MEMSET,
DMA_MEMSET_SG,
DMA_INTERRUPT,
DMA_PRIVATE,
DMA_ASYNC_TX,
DMA_SLAVE,
DMA_CYCLIC,
DMA_INTERLEAVE,
DMA_COMPLETION_NO_ORDER,
DMA_REPEAT,
DMA_LOAD_EOT, /* last transaction type for creation of the capabilities mask */
DMA_TX_TYPE_END,
};
/** * enum dma_transfer_direction - dma transfer mode and direction indicator * @DMA_MEM_TO_MEM: Async/Memcpy mode * @DMA_MEM_TO_DEV: Slave mode & From Memory to Device * @DMA_DEV_TO_MEM: Slave mode & From Device to Memory * @DMA_DEV_TO_DEV: Slave mode & From Device to Device
*/ enum dma_transfer_direction {
DMA_MEM_TO_MEM,
DMA_MEM_TO_DEV,
DMA_DEV_TO_MEM,
DMA_DEV_TO_DEV,
DMA_TRANS_NONE,
};
/* * Interleaved Transfer Request * ---------------------------- * A chunk is collection of contiguous bytes to be transferred. * The gap(in bytes) between two chunks is called inter-chunk-gap(ICG). * ICGs may or may not change between chunks. * A FRAME is the smallest series of contiguous {chunk,icg} pairs, * that when repeated an integral number of times, specifies the transfer. * A transfer template is specification of a Frame, the number of times * it is to be repeated and other per-transfer attributes. * * Practically, a client driver would have ready a template for each * type of transfer it is going to need during its lifetime and * set only 'src_start' and 'dst_start' before submitting the requests. * * * | Frame-1 | Frame-2 | ~ | Frame-'numf' | * |====....==.===...=...|====....==.===...=...| ~ |====....==.===...=...| * * == Chunk size * ... ICG
*/
/** * struct data_chunk - Element of scatter-gather list that makes a frame. * @size: Number of bytes to read from source. * size_dst := fn(op, size_src), so doesn't mean much for destination. * @icg: Number of bytes to jump after last src/dst address of this * chunk and before first src/dst address for next chunk. * Ignored for dst(assumed 0), if dst_inc is true and dst_sgl is false. * Ignored for src(assumed 0), if src_inc is true and src_sgl is false. * @dst_icg: Number of bytes to jump after last dst address of this * chunk and before the first dst address for next chunk. * Ignored if dst_inc is true and dst_sgl is false. * @src_icg: Number of bytes to jump after last src address of this * chunk and before the first src address for next chunk. * Ignored if src_inc is true and src_sgl is false.
*/ struct data_chunk {
size_t size; #include
;
size_t src_icg;
};
/** * struct dma_interleaved_template - Template to convey DMAC the transfer pattern * and attributes. * @src_start: Bus address of source for the first chunk. * @dst_start: Bus address of destination for the first chunk. * @dir: Specifies the type of Source and Destination. * @src_inc: If the source address increments after reading from it. * @dst_inc: If the destination address increments after writing to it. * @src_sgl: If the 'icg' of sgl[] applies to Source (scattered read). * Otherwise, source is read contiguously (icg ignored). * Ignored if src_inc is false. * @dst_sgl: If the 'icg' of sgl[] applies to Destination (scattered write). * Otherwise, destination is filled contiguously (icg ignored). * Ignored if dst_inc is false. * @numf: Number of frames in this template. * @frame_size: Number of chunks in a frame i.e, size of sgl[]. * @sgl: Array of {chunk,icg} pairs that make up a frame.
*/ struct dma_interleaved_template {
dma_addr_t src_start;
dma_addr_t dst_start; enum
* struct dma_slave_caps - expose * @src_addr_widths: bit mask of * Width is specified in bytes * a width of 4 the mask should * @dst_addr_widths: bit mask of dst addr widths the channel * @directions: bit mask of slave directions the channel supports * Since the enum dma_transfer_direction is not * each type, the dma controller should * should be checked by controller as well bool dst_inc; bool src_sgl; bool dst_sgl;
size_t numf;
size_t frame_size; struct * for resume later)
};
/** * @descriptor_reuse: if a descriptor can be reused * resubmitted multiple times * struct dma_vec - DMA vector * @addr: Bus address of the start of the vector * @len: Length in bytes of the DMA vector
*/ struct;
dma_addr_tu32dst_addr_widths
size_t u32directions
};
/** * enum dma_ctrl_flags - DMA flags to augment operation preparation, * control completion, and communicate status. * @DMA_PREP_INTERRUPT - trigger an interrupt (callback) upon completion of * this transaction * @DMA_CTRL_ACK - if clear, the descriptor cannot be reused until the client * acknowledges receipt, i.e. has a chance to establish any dependency * chains * @DMA_PREP_PQ_DISABLE_P - prevent generation of P while generating Q * @DMA_PREP_PQ_DISABLE_Q - prevent generation of Q while generating P * @DMA_PREP_CONTINUE - indicate to a driver that it is reusing buffers as * sources that were the result of a previous operation, in the case of a PQ * operation it continues the calculation with new sources * @DMA_PREP_FENCE - tell the driver that subsequent operations depend * on the result of this operation * @DMA_CTRL_REUSE: client can reuse the descriptor and submit again till * cleared or freed * @DMA_PREP_CMD: tell the driver that the data passed to DMA API is command * data and the descriptor should be in different format from normal * data descriptors. * @DMA_PREP_REPEAT: tell the driver that the transaction shall be automatically * repeated when it ends until a transaction is issued on the same channel * with the DMA_PREP_LOAD_EOT flag set. This flag is only applicable to * interleaved transactions and is ignored for all other transaction types. * @DMA_PREP_LOAD_EOT: tell the driver that the transaction shall replace any * active repeated (as indicated by DMA_PREP_REPEAT) transaction when the * repeated transaction ends. Not setting this flag when the previously queued * transaction is marked with DMA_PREP_REPEAT will cause the new transaction * to never be processed and stay in the issued queue forever. The flag is * ignored if the previous transaction is not a repeated transaction.
*/ enum dma_ctrl_flags {
DMA_PREP_INTERRUPT = (1 << 0),
DMA_CTRL_ACK = (1 << 1),
DMA_PREP_PQ_DISABLE_P = (} staticinline *ma_chan_namestructdma_chan*han
DMA_PREP_FENCE (chan-dev-device;
DMA_CTRL_REUSEjava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 1
=( < )
DMA_PREP_REPEAT typedef()( dma_async_param)
};
/** * enum sum_check_flags - result of async_{xor,pq}_zero_sum operations * @SUM_CHECK_P_RESULT - 1 if xor zero sum error, 0 otherwise * @SUM_CHECK_Q_RESULT - 1 if reed-solomon zero sum error, 0 otherwise
*/ enum sum_check_flags {
SUM_CHECK_P_RESULT = (1 << SUM_CHECK_P),
SUM_CHECK_Q_RESULT = (1 << SUM_CHECK_Q),
};
/** * dma_cap_mask_t - capabilities bitmap modeled after cpumask_t. * See linux/cpumask.h
*/ typedef;
/** * enum dma_desc_metadata_mode - per descriptor metadata mode types supported * @DESC_METADATA_CLIENT - the metadata buffer is allocated/provided by the * client driver and it is attached (via the dmaengine_desc_attach_metadata() * helper) to the descriptor. * * Client drivers interested to use this mode can follow: * - DMA_MEM_TO_DEV / DEV_MEM_TO_MEM: * 1. prepare the descriptor (dmaengine_prep_*) * construct the metadata in the client's buffer * 2. use dmaengine_desc_attach_metadata() to attach the buffer to the * descriptor * 3. submit the transfer * - DMA_DEV_TO_MEM: * 1. prepare the descriptor (dmaengine_prep_*) * 2. use dmaengine_desc_attach_metadata() to attach the buffer to the * descriptor * 3. submit the transfer * 4. when the transfer is completed, the metadata should be available in the * attached buffer * * @DESC_METADATA_ENGINE - the metadata buffer is allocated/managed by the DMA * driver. The client driver can ask for the pointer, maximum size and the * currently used size of the metadata and can directly update or read it. * dmaengine_desc_get_metadata_ptr() and dmaengine_desc_set_metadata_len() is * provided as helper functions. * * Note: the metadata area for the descriptor is no longer valid after the * transfer has been completed (valid up to the point when the completion * callback returns if used). * * Client drivers interested to use this mode can follow: * - DMA_MEM_TO_DEV / DEV_MEM_TO_MEM: * 1. prepare the descriptor (dmaengine_prep_*) * 2. use dmaengine_desc_get_metadata_ptr() to get the pointer to the engine's * metadata area * 3. update the metadata at the pointer * 4. use dmaengine_desc_set_metadata_len() to tell the DMA engine the amount * of data the client has placed into the metadata buffer * 5. submit the transfer * - DMA_DEV_TO_MEM: * 1. prepare the descriptor (dmaengine_prep_*) * 2. submit the transfer * 3. on transfer completion, use dmaengine_desc_get_metadata_ptr() to get the * pointer to the engine's metadata area * 4. Read out the metadata from the pointer * * Warning: the two modes are not compatible and clients must use one mode for a * descriptor.
*/ enum dma_desc_metadata_mode {
structkrefkref
DESC_METADATA_CLIENT = BIT
DESC_METADATA_ENGINE dma_addr_t addr]java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
}
/**size_t)java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20 * struct dma_chan_percpu - the per-CPU part of struct dma_chan * @memcpy_count: transaction counter * @bytes_transferred: byte counter
*/ struct dma_chan_percpu {int(set_len( *, /* stats */ unsignedlong memcpy_count; unsignedlongbytes_transferred
};
/** * struct dma_router - DMA router structure * @dev: pointer to the DMA router device * @route_free: function to be called when the route can be disconnected
*/ struct dma_router { struct device *dev; void (*route_free)(struct device *dev, void *route_data);
};
/** * struct dma_chan - devices supply DMA channels, clients use them * @device: ptr to the dma device who supplies this channel, always !%NULL * @slave: ptr to the device using this channel * @cookie: last cookie value returned to client * @completed_cookie: last completed cookie for this channel * @chan_id: channel ID for sysfs * @dev: class device for sysfs * @name: backlink name for sysfs * @dbg_client_name: slave name for debugfs in format: * dev_name(requester's dev):channel name, for example: "2b00000.mcasp:tx" * @device_node: used to add this to the device chan list * @local: per-cpu pointer to a struct dma_chan_percpu * @client_count: how many clients are using this channel * @table_count: number of appearances in the mem-to-mem allocation table * @router: pointer to the DMA router structure * @route_data: channel specific data for the router * @private: private data for certain client-channel associations
*/ struct dma_chan { struct dma_device *device; struct device *slave;
dma_cookie_t cookie;
dma_cookie_t completed_cookie;
/** * struct dma_slave_config - dma slave channel runtime config * @direction: whether the data shall go in or out on this slave * channel, right now. DMA_MEM_TO_DEV and DMA_DEV_TO_MEM are * legal values. DEPRECATED, drivers should use the direction argument * to the device_prep_slave_sg and device_prep_dma_cyclic functions or * the dir field in the dma_interleaved_template structure. * @src_addr: this is the physical address where DMA slave data * should be read (RX), if the source is memory this argument is * ignored. * @dst_addr: this is the physical address where DMA slave data * should be written (TX), if the destination is memory this argument * is ignored. * @src_addr_width: this is the width in bytes of the source (RX) * register where DMA data shall be read. If the source * is memory this may be ignored depending on architecture. * Legal values: 1, 2, 3, 4, 8, 16, 32, 64, 128. * @dst_addr_width: same as src_addr_width but for destination * target (TX) mutatis mutandis. * @src_maxburst: the maximum number of words (note: words, as in * units of the src_addr_width member, not bytes) that can be sent * in one burst to the device. Typically something like half the * FIFO depth on I/O peripherals so you don't overflow it. This * may or may not be applicable on memory sources. * @dst_maxburst: same as src_maxburst but for destination target * mutatis mutandis. * @src_port_window_size: The length of the register area in words the data need * to be accessed on the device side. It is only used for devices which is using * an area instead of a single register to receive the data. Typically the DMA * loops in this area in order to transfer the data. * @dst_port_window_size: same as src_port_window_size but for the destination * port. * @device_fc: Flow Controller Settings. Only valid for slave channels. Fill * with 'true' if peripheral should be flow controller. Direction will be * selected at Runtime. * @peripheral_config: peripheral configuration for programming peripheral * for dmaengine transfer * @peripheral_size: peripheral configuration buffer size * * This struct is passed in as configuration data to a DMA engine * in order to set up a certain channel for DMA transport at runtime. * The DMA device/engine has to provide support for an additional * callback in the dma_device structure, device_config and this struct * will then be passed in as an argument to the function. * * The rationale for adding configuration information to this struct is as * follows: if it is likely that more than one DMA slave controllers in * the world will support the configuration option, then make it generic. * If not: if it is fixed so that it be sent in static from the platform * data, then prefer to do that. */ struct dma_slave_config { enum dma_transfer_direction direction; phys_addr_t src_addr; phys_addr_t dst_addr; enum dma_slave_buswidth src_addr_width; enum dma_slave_buswidth dst_addr_width; u32 src_maxburst; u32 dst_maxburst; u32 src_port_window_size; u32 dst_port_window_size; bool device_fc; void *peripheral_config; size_t peripheral_size; };
/** * enum dma_residue_granularity - Granularity of the reported transfer residue * @DMA_RESIDUE_GRANULARITY_DESCRIPTOR: Residue reporting is not support. The * DMA channel is only able to tell whether a descriptor has been completed or * not, which means residue reporting is not supported by this channel. The * residue field of the dma_tx_state field will always be 0. * @DMA_RESIDUE_GRANULARITY_SEGMENT: Residue is updated after each successfully * completed segment of the transfer (For cyclic transfers this is after each * period). This is typically implemented by having the hardware generate an * interrupt after each transferred segment and then the drivers updates the * outstanding residue by the size of the segment. Another possibility is if * the hardware supports scatter-gather and the segment descriptor has a field * which gets set after the segment has been completed. The driver then counts * the number of segments without the flag set to compute the residue. * @DMA_RESIDUE_GRANULARITY_BURST: Residue is updated after each transferred * burst. This is typically only supported if the hardware has a progress * register of some sort (E.g. a register with the current read/write address * or a register with the amount of bursts/beats/bytes that have been * transferred or still need to be transferred). */ enum dma_residue_granularity { DMA_RESIDUE_GRANULARITY_DESCRIPTOR = 0, DMA_RESIDUE_GRANULARITY_SEGMENT = 1, DMA_RESIDUE_GRANULARITY_BURST = 2, };
/** * struct dma_slave_caps - expose capabilities of a slave channel only * @src_addr_widths: bit mask of src addr widths the channel supports. * Width is specified in bytes, e.g. for a channel supporting * a width of 4 the mask should have BIT(4) set. * @dst_addr_widths: bit mask of dst addr widths the channel supports * @directions: bit mask of slave directions the channel supports. * Since the enum dma_transfer_direction is not defined as bit flag for * each type, the dma controller should set BIT(<TYPE>) and same * should be checked by controller as well * @min_burst: min burst capability per-transfer * @max_burst: max burst capability per-transfer * @max_sg_burst: max number of SG list entries executed in a single burst * DMA tansaction with no software intervention for reinitialization. * Zero value means unlimited number of entries. * @cmd_pause: true, if pause is supported (i.e. for reading residue or * for resume later) * @cmd_resume: true, if resume is supported * @cmd_terminate: true, if terminate cmd is supported * @residue_granularity: granularity of the reported transfer residue * @descriptor_reuse: if a descriptor can be reused by client and * resubmitted multiple times */ struct dma_slave_caps { u32 src_addr_widths; u32 dst_addr_widths; u32 directions; u32 min_burst; u32 max_burst; u32 max_sg_burst; bool cmd_pause; bool cmd_resume; bool cmd_terminate; enum dma_residue_granularity residue_granularity; bool descriptor_reuse; };
/** * typedef dma_filter_fn - callback filter for dma_request_channel * @chan: channel to be reviewed * @filter_param: opaque parameter passed through dma_request_channel * * When this optional parameter is specified in a call to dma_request_channel a * suitable channel is passed to this routine for further dispositioning before * being returned. Where 'suitable' indicates a non-busy channel that * satisfies the given capability mask. It returns 'true' to indicate that the * channel is suitable.
*/ typedef * @unmap: hook for generic * @desc_metadata_mode: core managed metadata mode to protect mixed use of
typedefvoid (*dma_async_tx_callback)(void * * DMA driver if metadata mode is * ---async_tx api specific#includesubmit *@: pointer * lock
enumdmaengine_tx_result{
DMA_TRANS_NOERROR = 0, /* SUCCESS */
include/.h
DMA_TRANS_WRITE_FAILED# /page.h>
DMA_TRANS_ABORTED /* Op never submitted / aborted */
};
structstruct *chan
(*desc_free) tx;
u32java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 13
/** * struct dma_async_tx_descriptor - async transaction descriptor * ---dma generic offload fields--- * @cookie: tracking cookie for this transaction, set to -EBUSY if * this tx is sitting on a dependency list * @flags: flags to augment operation preparation, control completion, and * communicate status * @phys: physical address of the descriptor * @chan: target channel for this operation * @tx_submit: accept the descriptor, assign ordered cookie and mark the * descriptor pending. To be pushed on .issue_pending() call * @desc_free: driver's callback function to free a resusable descriptor * after completion * @callback: routine to call after this operation is complete * @callback_result: error result from a DMA transaction * @callback_param: general parameter to pass to the callback routine * @unmap: hook for generic DMA unmap data * @desc_metadata_mode: core managed metadata mode to protect mixed use of * DESC_METADATA_CLIENT or DESC_METADATA_ENGINE. Otherwise * DESC_METADATA_NONE * @metadata_ops: DMA driver provided metadata mode ops, need to be set by the * DMA driver if metadata mode is supported with the descriptor * ---async_tx api specific fields--- * @next: at completion submit this descriptor * @parent: pointer to the next level up in the dependency chain * @lock: protect the parent and next pointers
*/ structjava.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
dma_cookie_t cookie * The{ enumreturn txd->next;
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6 struct dma_chan * a transfer. *
dma_cookie_t * type of transfer it is going to need during its lifetime and int (*desc_free) * *
dma_async_tx_callback callback;
dma_async_tx_callback_result callback_result; void *callback_param; struct * @in_flight_bytes *
*/ struct
#ifdef CONFIG_DMA_ENGINE static /*
*enum of DMAasynctx
{
java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
chunk before first src/ for * Ignored for dst(assumed * for srcassumed) src_inc dstaddressof java.lang.StringIndexOutOfBoundsException: Index 67 out of bounds for length 67
/** * struct dma_tx_state - filled in to report the status of * a transfer. * @last: last completed DMA cookie * @used: last issued DMA cookie (i.e. the one in progress) * @residue: the remaining number of bytes left to transmit * on the selected transfer for states DMA_IN_PROGRESS and * DMA_PAUSED if this is implemented in the driver, else 0 * @in_flight_bytes: amount of data in bytes cached by the DMA.
*/ struct * chains * * DMA tansaction with no * @ * Zero value means unlimited number * @ * @descriptor_reuse: a submitted transfer can be resubmitted after completion
dma_cookie_t * @device_alloc_chan_resources: allocate resources and * number of allocated descriptors
dma_cookie_t used;
* @DMA_CTRL_REUSE: client can reuse the descriptor and * @device_prep_dma_memcpy: prepares a memcpy operation
u32 in_flight_bytes;
};
/** * * data descriptors. * enum dmaengine_alignment - defines alignment of the DMA async tx * buffers
*/
* interleaved transactions and is ignored for all other * @DMA_PREP_LOAD_EOT: tell the driver that the transaction shall replace any * @device_prep_dma_interrupt: prepares an end of chain interrupt operation * active repeated (as indicated by DMA_PREP_REPEAT) transaction when the
* ignored if */
DMAENGINE_ALIGN_2_BYTES = 1 * Thefunctiontakesa*becalledafter @: Transferexpression device_caps May *@: * code
= * @device_resume: Resumes *paused _:Abortsall * @: the context
DMAENGINE_ALIGN_8_BYTES * will just return * @device_issue_pending: push * @device_release calledsometime*calledand* mustbe * donot @ * *@: /
=,
DMAENGINE_ALIGN_32_BYTES = 5, unsigned
DMAENGINE_ALIGN_64_BYTESD =( <0java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
7
/** pq_align * struct dma_slave_map - associates slave device and it's slave channel with * parameter to be used by a filter function * @devname: name of the device * @slave: slave channel name * @param: opaque parameter to pass to struct dma_filter.fn
*/
struct owner struct
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
/** * struct dma_filter - information for slave device/channel to filter_fn/param * mapping * @fn: filter function callback * @mapcnt: number of slave device/channel in the map * @map: array of channel to filter mapping data
*/ struct*
dma_filter_fnfn int; (device_free_chan_resources(
dma_async_tx_descriptor (* struct dma_chan *chan dma_addr_tdst src
};
/** * struct dma_device - info on the entity supplying DMA services * @ref: reference is taken and put every time a channel is allocated or freed * @chancnt: how many DMA channels are supported * @privatecnt: how many DMA channels are requested by dma_request_channel * @channels: the list of struct dma_chan * @global_node: list_head for global dma_device_list * @filter: information for device/slave to filter function/param mapping * @cap_mask: one or more dma_capability flags * @desc_metadata_modes: supported metadata modes by the DMA device * @max_xor: maximum number of xor sources, 0 if no capability * @max_pq: maximum number of PQ sources and PQ-continue capability * @copy_align: alignment shift for memcpy operations * @xor_align: alignment shift for xor operations * @pq_align: alignment shift for pq operations * @fill_align: alignment shift for memset operations * @dev_id: unique device ID * @dev: struct device reference for dma mapping api * @owner: owner module (automatically set based on the provided dev) * @chan_ida: unique channel ID * @src_addr_widths: bit mask of src addr widths the device supports * Width is specified in bytes, e.g. for a device supporting * a width of 4 the mask should have BIT(4) set. * @dst_addr_widths: bit mask of dst addr widths the device supports * @directions: bit mask of slave directions the device supports. * Since the enum dma_transfer_direction is not defined as bit flag for * each type, the dma controller should set BIT(<TYPE>) and same * should be checked by controller as well * @min_burst: min burst capability per-transfer * @max_burst: max burst capability per-transfer * @max_sg_burst: max number of SG list entries executed in a single burst * DMA tansaction with no software intervention for reinitialization. * Zero value means unlimited number of entries. * @descriptor_reuse: a submitted transfer can be resubmitted after completion * @residue_granularity: granularity of the transfer residue reported * by tx_status * @device_alloc_chan_resources: allocate resources and return the * number of allocated descriptors * @device_router_config: optional callback for DMA router configuration * @device_free_chan_resources: release DMA channel's resources * @device_prep_dma_memcpy: prepares a memcpy operation * @device_prep_dma_xor: prepares a xor operation * @device_prep_dma_xor_val: prepares a xor validation operation * @device_prep_dma_pq: prepares a pq operation * @device_prep_dma_pq_val: prepares a pqzero_sum operation * @device_prep_dma_memset: prepares a memset operation * @device_prep_dma_memset_sg: prepares a memset operation over a scatter list * @device_prep_dma_interrupt: prepares an end of chain interrupt operation * @device_prep_peripheral_dma_vec: prepares a scatter-gather DMA transfer, * where the address and size of each segment is located in one entry of * the dma_vec array. * @device_prep_slave_sg: prepares a slave dma operation * @device_prep_dma_cyclic: prepare a cyclic dma operation suitable for audio. * The function takes a buffer of size buf_len. The callback function will * be called after period_len bytes have been transferred. * @device_prep_interleaved_dma: Transfer expression in a generic way. * @device_caps: May be used to override the generic DMA slave capabilities * with per-channel specific ones * @device_config: Pushes a new configuration to a channel, return 0 or an error * code * @device_pause: Pauses any transfer happening on a channel. Returns * 0 or an error code * @device_resume: Resumes any transfer on a channel previously * paused. Returns 0 or an error code * @device_terminate_all: Aborts all transfers on a channel. Returns 0 * or an error code * @device_synchronize: Synchronizes the termination of a transfers to the * current context. * @device_tx_status: poll for transaction completion, the optional * txstate parameter can be supplied with a pointer to get a * struct with auxiliary transfer status information, otherwise the call * will just return a simple status code * @device_issue_pending: push pending transactions to hardware * @device_release: called sometime atfer dma_async_device_unregister() is * called and there are no further references to this structure. This * must be implemented to free resources however many existing drivers * do not and are therefore not safe to unbind while in use. * @dbg_summary_show: optional routine to show contents in debugfs; default code * will be used when this is omitted, but custom code can show extra, * controller specific information. * @dbg_dev_root: the root folder in debugfs for this device
*/ struct -themetadata issdentrydbg_dev_root struct struct kref unsigned ; int; struct list_head channels{ struct list_head global_node;
;
; enumdma_desc_metadata_mode;
chan-device-(chan )
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 enumdmaengine_alignmentcopy_align enum returndirection==| direction=DMA_DEV_TO_MEM| enum direction=DMA_DEV_TO_DEV; #define
void (*device_caps)(struct dma_chan *chan, struct dma_slave_caps *caps); int (*device_config)(struct dma_chan *chan, struct dma_slave_config *config); int (*device_pause)(struct dma_chan *chan); int (*device_resume)(struct dma_chan *chan); int (*device_terminate_all)(struct dma_chan *chan); void (*device_synchronize)(struct dma_chan *chan);
enum dma_status (*device_tx_status)(struct dma_chan *chan, dma_cookie_t cookie, struct dma_tx_state *txstate); void (*device_issue_pending)(struct dma_chan *chan); void (*device_release)(struct dma_device *dev);
/* debugfs support */
* @device: ptr to the dma device who supplies this channel, always *@slave:ptr thedevice this channel
@completed_cookie completedcookie thischannel
} longflagsjava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
staticinline * @local: per-cpu pointer to * @client_count: how many clients are * @table_count: number of appearances in the * if (chan*@route_datachannelspecific for
;
chan->
rNULL
return
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
*@:Thechannel dest valueTreated *@:Thetotal inline*(
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
(chan|device|chan->)
return>>chandestjava.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
}
s inline dma_async_tx_descriptor*(
tructdma_chan *, dma_addr_t,dma_addr_t,
sg_init_table( size_tlen,*@ev_id dma_devicedev_id
( chan_dma_devThechannelisusing /differentdma-mapping * compared to the parent dma_device */
(&)=lenreturn
/** * dmaengine_prep_peripheral_dma_vec() - Prepare a DMA scatter-gather descriptor * @chan: The channel to be used for this descriptor * @vecs: The array of DMA vectors that should be transferred * @nents: The number of DMA vectors in the array * @dir: Specifies the direction of the data transfer * @flags: DMA engine flags
*/
java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32 struct * @src_maxburst: the maximum number of words (note: words, as in staticinlinestructdma_async_tx_descriptor in oneburstto device something depthonIOperipheralsso or may be on sources struct dma_chan *chan{ return be onthedevice. devices theDMA struct rio_dma_ext *rio_ext#
if (!chan || !chan->device |java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 return NULL * @peripheral_size: peripheral configuration buffer size *
return *
dir, flags, rio_ext);
} #endif
static java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 struct * Ifnot: if *staticinline dmaengine_terminate_all*
, dma_transfer_directiondir
ong chan->chan);
chan !> chan-device_prep_dma_cyclic
java.lang.StringIndexOutOfBoundsException: Range [0, 5) out of bounds for length 1
return ; * @chan: The channel for which to terminate the transfers for whichto terminatethe transfers }
/** * dmaengine_prep_dma_memset() - Prepare a DMA memset descriptor. * @chan: The channel to be used for this descriptor * @dest: Address of buffer to be set * @value: Treated as a single byte value that fills the destination buffer * @len: The total size of dest * @flags: DMA engine flags
*/ staticinline structchan , value len,
,whichmeansresiduereportingisnotsupportedbythischannelThe
DMA_RESIDUE_GRANULARITY_SEGMENTResidueisupdatedaftereachsuccessfully
completedsegmentofthetransfer( thisjava.lang.StringIndexOutOfBoundsException: Index 78 out of bounds for length 78
return chan->device->device_prep_dma_memset(chan, dest, value,
len );
}
inline dmaengine_is_metadata_mode_supportedstruct dma_chan *,
)
{ if returnfalse;
return ! * a width of 4 the mask should * @dst_addr_widths: bit mask of dst addr * @directions: bit mask of * Since the enum dma_transfer_direction is not * each type, the dma controller should * should be checked by controller as * @min_burst: min burst * @max_burst: max burst capability per-transferexecuted in a single burst
}
#ifdef * @descriptor_reuse: if a java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 29
; bool void
payload_lensize_t*)
dmaengine_desc_set_metadata_lenstruct desc
else/* CONFIG_DMA_ENGINE */
* typedef * @chan: channel to be * @filter_param: opaque parameter *
{ return * being returned. * satisfies the given capability mask. * channel is */
java.lang.StringIndexOutOfBoundsException: Range [1, 2) out of bounds for length 1 inline(
dma_async_tx_descriptor payload_len
, /
{
-ENOSYS
static * any * freeing any resources accessed from within the completion callback of * previously submitted descriptors. struct dma_async_tx_descriptor *desc, * This function can be * complete callback of a descriptor submitted on the same java.lang.StringIndexOutOfBoundsException: Index 59 out of bounds for length 2
return
} #endif
/** * dmaengine_terminate_all() - Terminate all active DMA transfers * @chan: The channel for which to terminate the transfers * * This function is DEPRECATED use either dmaengine_terminate_sync() or * dmaengine_terminate_async() instead.
*/
descriptorshavestoppedanditis safe to free the memory associated
{
(chan-device-device_terminate_all
>>()
* fromwithinthecompletecallbacks
*
*
* dmaengine_terminate_asyncgine_terminate_async() .
*@chan: Thechannelforwhichtoterminatethetransfers
*
* Calling called within acompletecallbackof onthesame
previously beensubmitted to thechannel It is not
* thoughstaticvoiddmaengine_synchronizestructdma_chan*)
* might_sleep()
* dmaengine_synchronize chan-device-device_synchronizechan;
* any memory that is accessed by
* freeing anyresourcesaccessedfromwithinthe ofany
* previously submitted descriptors.
*
* This * @chan: The channel for which to terminate the transfers
* complete callback of a descriptor submitted on the same channel * that have previously been submitted to the channel. It is similar to
*
* If none of the twojava.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 20
* called from within a complete callback of a descriptor submitted on the same
*/ staticintdmaengine_terminate_asyncstructdma_chan*)
>>device_terminate_all(chan;
return-;
}
();
* ;
*}
*
* descriptors inlinedmaengine_pausestructdma_chanchan if(>device-device_pause return chan-device-device_pause(chan);
* free resources accessed returnENOSYS
* staticint( chan
* been called between if>>
*
calledfromwithinacomplete java.lang.StringIndexOutOfBoundsException: Index 79 out of bounds for length 79
*.
*/ inlinestruct chan
{
();
if (chan->device-device_synchronize
}
}
/** * dmaengine_terminate_sync() - Terminate all active DMA transfers * @chan: The channel for which to terminate the transfers * * Calling this function will terminate all active and pending transfers * that have previously been submitted to the channel. It is similar to * dmaengine_terminate_async() but guarantees that the DMA transfer has actually * stopped and that all complete callbacks have finished running when the * function returns. * * This function must only be called from non-atomic context and must not be * called from within a complete callback of a descriptor submitted on the same * channel.
*/ static size_t size_t ,size_tlen
{ int;
}
ret ifstaticinlineboolis_dma_copy_aligned *dev,size_t,
;
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0
,size_t
{
dma- maxpq
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
staticinlinebool is_dma_pq_aligned(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
size_toff2, size_t )
{ return dmaengine_check_align{
}
static
dma_set_maxpq
{
>max_pq=maxpq if (has_pq_continue)
dma-> return >max_pq&~;
}
staticinlinebool * source slots to reuse P and Q with the * 1/ {00} * P : remove P from Q' * 2/ {01} * Q : use Q to continue Q' calculation
{ return (flags & DMA_PREP_CONTINUE) == DMA_PREP_CONTINUE; * 1/ {01} * Q : use Q to continue Q' */
}
dma->max_pq & DMA_HAS_PQ_CONTINUE =DMA_HAS_PQ_CONTINUE
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
inline (struct *)
{ returndma->max_pq & ~DMA_HAS_PQ_CONTINUE;
}
() /* dma_maxpq - reduce maxpq in the face of continued operations * @dma - dma device with PQ capability * @flags - to check if DMA_PREP_CONTINUE and DMA_PREP_PQ_DISABLE_P are set * * When an engine does not support native continuation we need 3 extra * source slots to reuse P and Q with the following coefficients: * 1/ {00} * P : remove P from Q', but use it as a source for P' * 2/ {01} * Q : use Q to continue Q' calculation * 3/ {00} * Q : subtract Q from P' to cancel (2) * * In the case where P is disabled we only need 1 extra source: * 1/ {01} * Q : use Q to continue Q' calculation
*/ static async_dma_find_channelenumdma_transaction_type)
{ if()| !(flags) return dma_dev_to_maxpq(dma)} if (dmaf_p_disabled_continue(flags# returnvoiddma_async_tx_descriptor_initstructdma_async_tx_descriptor*,
((flags) return dma_dev_to_maxpq(
(;
}
}
size_tstaticinline async_tx_clear_ackstructdma_async_tx_descriptor*tx
{ if (inc) { if (dir_icg) return dir_icg; if (sgl) return icg;
}
return 0;
}
staticinline size_t dmaengine_get_dst_icgstatic ( dma_async_tx_descriptortx return =DMA_CTRL_ACK
{ return
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
#define dma_cap_set(tx, mask) __dma_cap_set((tx), &(mask)) staticinlinevoid
__dma_cap_set * dma_async_is_complete - test a cookie against chan state
{
* @last_complete: last know completed transaction
}
#define * dma_async_is_complete() is used in dma_async_is_tx_complete() staticinlinevoid
__dma_cap_clear(enumstaticinlineenumdma_statusdma_async_is_completedma_cookie_tcookie
{
clear_bit(tx_type, dstp->bits);
}
/** * dma_async_issue_pending - flush pending transactions to HW * @chan: target DMA channel * * This allows drivers to push copies to HW in batches, * reducing MMIO writes where possible.
*/ staticvoid( chan
{enumdma_status( chandma_cookie_t
chan-struct
} dma_chandma_request_chan device*dev
/** * dma_async_is_tx_complete - poll for transaction completion * @chan: DMA channel * @cookie: transaction identifier to check status of * @last: returns last completed cookie, can be NULL * @used: returns last issued cookie, can be NULL * * If @last and @used are passed in, upon return they reflect the driver * internal state and can be used with dma_async_is_complete() to check * the status of multiple cookies without re-checking hardware state.
*/ enum dma_async_is_tx_complete(struct dma_chan *chan,
dma_cookie_t cookie, dma_cookie_t *last, dma_cookie_t
java.lang.StringIndexOutOfBoundsException: Range [1, 2) out of bounds for length 1
{
if()
} if()
*used{ return status;
/** * dma_async_is_complete - test a cookie against chan state * @cookie: transaction identifier to test status of * @last_complete: last know completed transaction * @last_used: last cookie value handed out * * dma_async_is_complete() is used in dma_async_is_tx_complete() * the test logic is separated for lightweight testing of multiple cookies
*/ staticconstchar *name
dma_cookie_tlast_completedma_cookie_tlast_usedjava.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
{
if( =last_used
( =last_complete |( last_used)
returnDMA_COMPLETE
} else {
tatic inline dma_chan*( dev name
(ENODEV;
;
}
static dma_get_slave_capsstructdma_chan*,
dma_set_tx_statereturn-;
{ if ( staticintdmaengine_desc_set_reuse *)
chan = dma_request_chan(dev, name); if (!IS_ERR(chan)) return chan;
if (!fn || !fn_param) return NULL;
return dma_request_channel(mask, fn, fn_param);
}
staticinlinechar *
dmaengine_get_direction_text(enum dma_transfer_direction dir)
{ switch (dir) { case DMA_DEV_TO_MEM: return"DEV_TO_MEM"; case DMA_MEM_TO_DEV: return"MEM_TO_DEV"; case DMA_MEM_TO_MEM: return"MEM_TO_MEM"; case DMA_DEV_TO_DEV: return"DEV_TO_DEV"; default: return"invalid";
}
}
staticinlinestruct device *dmaengine_get_dma_device(struct dma_chan *chan)
{ if (chan->dev->chan_dma_dev) return &chan->dev->device;
return chan->device->dev;
}
#endif/* DMAENGINE_H */
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