1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | /* |
3 | * Texas Instruments CPDMA Driver |
4 | * |
5 | * Copyright (C) 2010 Texas Instruments |
6 | * |
7 | */ |
8 | #ifndef __DAVINCI_CPDMA_H__ |
9 | #define __DAVINCI_CPDMA_H__ |
10 | |
11 | #define CPDMA_MAX_CHANNELS BITS_PER_LONG |
12 | |
13 | #define CPDMA_RX_SOURCE_PORT(__status__) ((__status__ >> 16) & 0x7) |
14 | |
15 | #define CPDMA_RX_VLAN_ENCAP BIT(19) |
16 | |
17 | #define CPDMA_EOI_RX_THRESH 0x0 |
18 | #define CPDMA_EOI_RX 0x1 |
19 | #define CPDMA_EOI_TX 0x2 |
20 | #define CPDMA_EOI_MISC 0x3 |
21 | |
22 | struct cpdma_params { |
23 | struct device *dev; |
24 | void __iomem *dmaregs; |
25 | void __iomem *txhdp, *rxhdp, *txcp, *rxcp; |
26 | void __iomem *rxthresh, *rxfree; |
27 | int num_chan; |
28 | bool has_soft_reset; |
29 | int min_packet_size; |
30 | dma_addr_t desc_mem_phys; |
31 | dma_addr_t desc_hw_addr; |
32 | int desc_mem_size; |
33 | int desc_align; |
34 | u32 bus_freq_mhz; |
35 | u32 descs_pool_size; |
36 | |
37 | /* |
38 | * Some instances of embedded cpdma controllers have extra control and |
39 | * status registers. The following flag enables access to these |
40 | * "extended" registers. |
41 | */ |
42 | bool has_ext_regs; |
43 | }; |
44 | |
45 | struct cpdma_chan_stats { |
46 | u32 head_enqueue; |
47 | u32 tail_enqueue; |
48 | u32 pad_enqueue; |
49 | u32 misqueued; |
50 | u32 desc_alloc_fail; |
51 | u32 pad_alloc_fail; |
52 | u32 runt_receive_buff; |
53 | u32 runt_transmit_buff; |
54 | u32 empty_dequeue; |
55 | u32 busy_dequeue; |
56 | u32 good_dequeue; |
57 | u32 requeue; |
58 | u32 teardown_dequeue; |
59 | }; |
60 | |
61 | struct cpdma_ctlr; |
62 | struct cpdma_chan; |
63 | |
64 | typedef void (*cpdma_handler_fn)(void *token, int len, int status); |
65 | |
66 | struct cpdma_ctlr *cpdma_ctlr_create(struct cpdma_params *params); |
67 | int cpdma_ctlr_destroy(struct cpdma_ctlr *ctlr); |
68 | int cpdma_ctlr_start(struct cpdma_ctlr *ctlr); |
69 | int cpdma_ctlr_stop(struct cpdma_ctlr *ctlr); |
70 | |
71 | struct cpdma_chan *cpdma_chan_create(struct cpdma_ctlr *ctlr, int chan_num, |
72 | cpdma_handler_fn handler, int rx_type); |
73 | int cpdma_chan_get_rx_buf_num(struct cpdma_chan *chan); |
74 | int cpdma_chan_destroy(struct cpdma_chan *chan); |
75 | int cpdma_chan_start(struct cpdma_chan *chan); |
76 | int cpdma_chan_stop(struct cpdma_chan *chan); |
77 | |
78 | int cpdma_chan_get_stats(struct cpdma_chan *chan, |
79 | struct cpdma_chan_stats *stats); |
80 | int cpdma_chan_submit_mapped(struct cpdma_chan *chan, void *token, |
81 | dma_addr_t data, int len, int directed); |
82 | int cpdma_chan_submit(struct cpdma_chan *chan, void *token, void *data, |
83 | int len, int directed); |
84 | int cpdma_chan_idle_submit_mapped(struct cpdma_chan *chan, void *token, |
85 | dma_addr_t data, int len, int directed); |
86 | int cpdma_chan_idle_submit(struct cpdma_chan *chan, void *token, void *data, |
87 | int len, int directed); |
88 | int cpdma_chan_process(struct cpdma_chan *chan, int quota); |
89 | |
90 | int cpdma_ctlr_int_ctrl(struct cpdma_ctlr *ctlr, bool enable); |
91 | void cpdma_ctlr_eoi(struct cpdma_ctlr *ctlr, u32 value); |
92 | int cpdma_chan_int_ctrl(struct cpdma_chan *chan, bool enable); |
93 | u32 cpdma_ctrl_rxchs_state(struct cpdma_ctlr *ctlr); |
94 | u32 cpdma_ctrl_txchs_state(struct cpdma_ctlr *ctlr); |
95 | bool cpdma_check_free_tx_desc(struct cpdma_chan *chan); |
96 | int cpdma_chan_set_weight(struct cpdma_chan *ch, int weight); |
97 | int cpdma_chan_set_rate(struct cpdma_chan *ch, u32 rate); |
98 | u32 cpdma_chan_get_rate(struct cpdma_chan *ch); |
99 | u32 cpdma_chan_get_min_rate(struct cpdma_ctlr *ctlr); |
100 | |
101 | enum cpdma_control { |
102 | CPDMA_TX_RLIM, /* read-write */ |
103 | CPDMA_CMD_IDLE, /* write-only */ |
104 | CPDMA_COPY_ERROR_FRAMES, /* read-write */ |
105 | CPDMA_RX_OFF_LEN_UPDATE, /* read-write */ |
106 | CPDMA_RX_OWNERSHIP_FLIP, /* read-write */ |
107 | CPDMA_TX_PRIO_FIXED, /* read-write */ |
108 | CPDMA_STAT_IDLE, /* read-only */ |
109 | CPDMA_STAT_TX_ERR_CHAN, /* read-only */ |
110 | CPDMA_STAT_TX_ERR_CODE, /* read-only */ |
111 | CPDMA_STAT_RX_ERR_CHAN, /* read-only */ |
112 | CPDMA_STAT_RX_ERR_CODE, /* read-only */ |
113 | CPDMA_RX_BUFFER_OFFSET, /* read-write */ |
114 | }; |
115 | |
116 | int cpdma_control_get(struct cpdma_ctlr *ctlr, int control); |
117 | int cpdma_control_set(struct cpdma_ctlr *ctlr, int control, int value); |
118 | int cpdma_get_num_rx_descs(struct cpdma_ctlr *ctlr); |
119 | int cpdma_set_num_rx_descs(struct cpdma_ctlr *ctlr, int num_rx_desc); |
120 | int cpdma_get_num_tx_descs(struct cpdma_ctlr *ctlr); |
121 | |
122 | #endif |
123 | |