drivers/net/ethernet/ti/davinci_cpdma.h
Source file repositories/reference/linux-study-clean/drivers/net/ethernet/ti/davinci_cpdma.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/net/ethernet/ti/davinci_cpdma.h- Extension
.h- Size
- 3946 bytes
- Lines
- 123
- Domain
- Driver Families
- Bucket
- drivers/net
- Inferred role
- Driver Families: implementation source
- Status
- source implementation candidate
Why This File Exists
Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
struct cpdma_paramsstruct cpdma_chan_statsstruct cpdma_ctlrstruct cpdma_chanenum cpdma_control
Annotated Snippet
struct cpdma_params {
struct device *dev;
void __iomem *dmaregs;
void __iomem *txhdp, *rxhdp, *txcp, *rxcp;
void __iomem *rxthresh, *rxfree;
int num_chan;
bool has_soft_reset;
int min_packet_size;
dma_addr_t desc_mem_phys;
dma_addr_t desc_hw_addr;
int desc_mem_size;
int desc_align;
u32 bus_freq_mhz;
u32 descs_pool_size;
/*
* Some instances of embedded cpdma controllers have extra control and
* status registers. The following flag enables access to these
* "extended" registers.
*/
bool has_ext_regs;
};
struct cpdma_chan_stats {
u32 head_enqueue;
u32 tail_enqueue;
u32 pad_enqueue;
u32 misqueued;
u32 desc_alloc_fail;
u32 pad_alloc_fail;
u32 runt_receive_buff;
u32 runt_transmit_buff;
u32 empty_dequeue;
u32 busy_dequeue;
u32 good_dequeue;
u32 requeue;
u32 teardown_dequeue;
};
struct cpdma_ctlr;
struct cpdma_chan;
typedef void (*cpdma_handler_fn)(void *token, int len, int status);
struct cpdma_ctlr *cpdma_ctlr_create(struct cpdma_params *params);
int cpdma_ctlr_destroy(struct cpdma_ctlr *ctlr);
int cpdma_ctlr_start(struct cpdma_ctlr *ctlr);
int cpdma_ctlr_stop(struct cpdma_ctlr *ctlr);
struct cpdma_chan *cpdma_chan_create(struct cpdma_ctlr *ctlr, int chan_num,
cpdma_handler_fn handler, int rx_type);
int cpdma_chan_get_rx_buf_num(struct cpdma_chan *chan);
int cpdma_chan_destroy(struct cpdma_chan *chan);
int cpdma_chan_start(struct cpdma_chan *chan);
int cpdma_chan_stop(struct cpdma_chan *chan);
int cpdma_chan_get_stats(struct cpdma_chan *chan,
struct cpdma_chan_stats *stats);
int cpdma_chan_submit_mapped(struct cpdma_chan *chan, void *token,
dma_addr_t data, int len, int directed);
int cpdma_chan_submit(struct cpdma_chan *chan, void *token, void *data,
int len, int directed);
int cpdma_chan_idle_submit_mapped(struct cpdma_chan *chan, void *token,
dma_addr_t data, int len, int directed);
int cpdma_chan_idle_submit(struct cpdma_chan *chan, void *token, void *data,
int len, int directed);
int cpdma_chan_process(struct cpdma_chan *chan, int quota);
int cpdma_ctlr_int_ctrl(struct cpdma_ctlr *ctlr, bool enable);
void cpdma_ctlr_eoi(struct cpdma_ctlr *ctlr, u32 value);
int cpdma_chan_int_ctrl(struct cpdma_chan *chan, bool enable);
u32 cpdma_ctrl_rxchs_state(struct cpdma_ctlr *ctlr);
u32 cpdma_ctrl_txchs_state(struct cpdma_ctlr *ctlr);
bool cpdma_check_free_tx_desc(struct cpdma_chan *chan);
int cpdma_chan_set_weight(struct cpdma_chan *ch, int weight);
int cpdma_chan_set_rate(struct cpdma_chan *ch, u32 rate);
u32 cpdma_chan_get_rate(struct cpdma_chan *ch);
u32 cpdma_chan_get_min_rate(struct cpdma_ctlr *ctlr);
enum cpdma_control {
CPDMA_TX_RLIM, /* read-write */
CPDMA_CMD_IDLE, /* write-only */
CPDMA_COPY_ERROR_FRAMES, /* read-write */
CPDMA_RX_OFF_LEN_UPDATE, /* read-write */
CPDMA_RX_OWNERSHIP_FLIP, /* read-write */
CPDMA_TX_PRIO_FIXED, /* read-write */
CPDMA_STAT_IDLE, /* read-only */
CPDMA_STAT_TX_ERR_CHAN, /* read-only */
CPDMA_STAT_TX_ERR_CODE, /* read-only */
CPDMA_STAT_RX_ERR_CHAN, /* read-only */
Annotation
- Detected declarations: `struct cpdma_params`, `struct cpdma_chan_stats`, `struct cpdma_ctlr`, `struct cpdma_chan`, `enum cpdma_control`.
- Atlas domain: Driver Families / drivers/net.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.