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ff7b0479 SB |
1 | /* |
2 | * Copyright (C) 2007, 2008, Marvell International Ltd. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
11 | * for more details. | |
ff7b0479 SB |
12 | */ |
13 | ||
14 | #ifndef MV_XOR_H | |
15 | #define MV_XOR_H | |
16 | ||
17 | #include <linux/types.h> | |
18 | #include <linux/io.h> | |
19 | #include <linux/dmaengine.h> | |
20 | #include <linux/interrupt.h> | |
21 | ||
b503fa01 | 22 | #define MV_XOR_POOL_SIZE PAGE_SIZE |
ff7b0479 SB |
23 | #define MV_XOR_SLOT_SIZE 64 |
24 | #define MV_XOR_THRESHOLD 1 | |
60d151f3 | 25 | #define MV_XOR_MAX_CHANNELS 2 |
ff7b0479 | 26 | |
22843545 LA |
27 | #define MV_XOR_MIN_BYTE_COUNT SZ_128 |
28 | #define MV_XOR_MAX_BYTE_COUNT (SZ_16M - 1) | |
29 | ||
e03bc654 | 30 | /* Values for the XOR_CONFIG register */ |
ff7b0479 SB |
31 | #define XOR_OPERATION_MODE_XOR 0 |
32 | #define XOR_OPERATION_MODE_MEMCPY 2 | |
e03bc654 | 33 | #define XOR_DESCRIPTOR_SWAP BIT(14) |
ff7b0479 | 34 | |
0e7488ed EG |
35 | #define XOR_DESC_DMA_OWNED BIT(31) |
36 | #define XOR_DESC_EOD_INT_EN BIT(31) | |
37 | ||
82a1402e EG |
38 | #define XOR_CURR_DESC(chan) (chan->mmr_high_base + 0x10 + (chan->idx * 4)) |
39 | #define XOR_NEXT_DESC(chan) (chan->mmr_high_base + 0x00 + (chan->idx * 4)) | |
40 | #define XOR_BYTE_COUNT(chan) (chan->mmr_high_base + 0x20 + (chan->idx * 4)) | |
41 | #define XOR_DEST_POINTER(chan) (chan->mmr_high_base + 0xB0 + (chan->idx * 4)) | |
42 | #define XOR_BLOCK_SIZE(chan) (chan->mmr_high_base + 0xC0 + (chan->idx * 4)) | |
43 | #define XOR_INIT_VALUE_LOW(chan) (chan->mmr_high_base + 0xE0) | |
44 | #define XOR_INIT_VALUE_HIGH(chan) (chan->mmr_high_base + 0xE4) | |
ff7b0479 SB |
45 | |
46 | #define XOR_CONFIG(chan) (chan->mmr_base + 0x10 + (chan->idx * 4)) | |
47 | #define XOR_ACTIVATION(chan) (chan->mmr_base + 0x20 + (chan->idx * 4)) | |
48 | #define XOR_INTR_CAUSE(chan) (chan->mmr_base + 0x30) | |
49 | #define XOR_INTR_MASK(chan) (chan->mmr_base + 0x40) | |
50 | #define XOR_ERROR_CAUSE(chan) (chan->mmr_base + 0x50) | |
51 | #define XOR_ERROR_ADDR(chan) (chan->mmr_base + 0x60) | |
0e7488ed EG |
52 | |
53 | #define XOR_INT_END_OF_DESC BIT(0) | |
54 | #define XOR_INT_END_OF_CHAIN BIT(1) | |
55 | #define XOR_INT_STOPPED BIT(2) | |
56 | #define XOR_INT_PAUSED BIT(3) | |
57 | #define XOR_INT_ERR_DECODE BIT(4) | |
58 | #define XOR_INT_ERR_RDPROT BIT(5) | |
59 | #define XOR_INT_ERR_WRPROT BIT(6) | |
60 | #define XOR_INT_ERR_OWN BIT(7) | |
61 | #define XOR_INT_ERR_PAR BIT(8) | |
62 | #define XOR_INT_ERR_MBUS BIT(9) | |
63 | ||
64 | #define XOR_INTR_ERRORS (XOR_INT_ERR_DECODE | XOR_INT_ERR_RDPROT | \ | |
65 | XOR_INT_ERR_WRPROT | XOR_INT_ERR_OWN | \ | |
66 | XOR_INT_ERR_PAR | XOR_INT_ERR_MBUS) | |
67 | ||
ba87d137 | 68 | #define XOR_INTR_MASK_VALUE (XOR_INT_END_OF_DESC | XOR_INT_END_OF_CHAIN | \ |
0e7488ed | 69 | XOR_INT_STOPPED | XOR_INTR_ERRORS) |
ff7b0479 | 70 | |
82a1402e EG |
71 | #define WINDOW_BASE(w) (0x50 + ((w) << 2)) |
72 | #define WINDOW_SIZE(w) (0x70 + ((w) << 2)) | |
73 | #define WINDOW_REMAP_HIGH(w) (0x90 + ((w) << 2)) | |
74 | #define WINDOW_BAR_ENABLE(chan) (0x40 + ((chan) << 2)) | |
75 | #define WINDOW_OVERRIDE_CTRL(chan) (0xA0 + ((chan) << 2)) | |
ff7b0479 | 76 | |
297eedba | 77 | struct mv_xor_device { |
60d151f3 TP |
78 | void __iomem *xor_base; |
79 | void __iomem *xor_high_base; | |
80 | struct clk *clk; | |
1ef48a26 | 81 | struct mv_xor_chan *channels[MV_XOR_MAX_CHANNELS]; |
ff7b0479 SB |
82 | }; |
83 | ||
84 | /** | |
85 | * struct mv_xor_chan - internal representation of a XOR channel | |
86 | * @pending: allows batching of hardware operations | |
ff7b0479 SB |
87 | * @lock: serializes enqueue/dequeue operations to the descriptors pool |
88 | * @mmr_base: memory mapped register base | |
89 | * @idx: the index of the xor channel | |
90 | * @chain: device chain view of the descriptors | |
91 | * @completed_slots: slots completed by HW but still need to be acked | |
92 | * @device: parent device | |
93 | * @common: common dmaengine channel object members | |
94 | * @last_used: place holder for allocation to continue from where it left off | |
95 | * @all_slots: complete domain of slots usable by the channel | |
96 | * @slots_allocated: records the actual size of the descriptor slot pool | |
97 | * @irq_tasklet: bottom half where mv_xor_slot_cleanup runs | |
98 | */ | |
99 | struct mv_xor_chan { | |
100 | int pending; | |
ff7b0479 SB |
101 | spinlock_t lock; /* protects the descriptor slot pool */ |
102 | void __iomem *mmr_base; | |
82a1402e | 103 | void __iomem *mmr_high_base; |
ff7b0479 | 104 | unsigned int idx; |
88eb92cb | 105 | int irq; |
ff7b0479 SB |
106 | enum dma_transaction_type current_type; |
107 | struct list_head chain; | |
108 | struct list_head completed_slots; | |
1ef48a26 TP |
109 | dma_addr_t dma_desc_pool; |
110 | void *dma_desc_pool_virt; | |
111 | size_t pool_size; | |
112 | struct dma_device dmadev; | |
98817b99 | 113 | struct dma_chan dmachan; |
ff7b0479 SB |
114 | struct mv_xor_desc_slot *last_used; |
115 | struct list_head all_slots; | |
116 | int slots_allocated; | |
117 | struct tasklet_struct irq_tasklet; | |
22843545 LA |
118 | char dummy_src[MV_XOR_MIN_BYTE_COUNT]; |
119 | char dummy_dst[MV_XOR_MIN_BYTE_COUNT]; | |
120 | dma_addr_t dummy_src_addr, dummy_dst_addr; | |
ff7b0479 SB |
121 | }; |
122 | ||
123 | /** | |
124 | * struct mv_xor_desc_slot - software descriptor | |
125 | * @slot_node: node on the mv_xor_chan.all_slots list | |
126 | * @chain_node: node on the mv_xor_chan.chain list | |
127 | * @completed_node: node on the mv_xor_chan.completed_slots list | |
128 | * @hw_desc: virtual address of the hardware descriptor chain | |
129 | * @phys: hardware address of the hardware descriptor chain | |
dfc97661 | 130 | * @slot_used: slot in use or not |
ff7b0479 | 131 | * @idx: pool index |
64203b67 | 132 | * @tx_list: list of slots that make up a multi-descriptor transaction |
ff7b0479 | 133 | * @async_tx: support for the async_tx api |
ff7b0479 SB |
134 | */ |
135 | struct mv_xor_desc_slot { | |
136 | struct list_head slot_node; | |
137 | struct list_head chain_node; | |
138 | struct list_head completed_node; | |
139 | enum dma_transaction_type type; | |
140 | void *hw_desc; | |
dfc97661 | 141 | u16 slot_used; |
ff7b0479 | 142 | u16 idx; |
ff7b0479 | 143 | struct dma_async_tx_descriptor async_tx; |
ff7b0479 SB |
144 | }; |
145 | ||
e03bc654 TP |
146 | /* |
147 | * This structure describes XOR descriptor size 64bytes. The | |
148 | * mv_phy_src_idx() macro must be used when indexing the values of the | |
149 | * phy_src_addr[] array. This is due to the fact that the 'descriptor | |
150 | * swap' feature, used on big endian systems, swaps descriptors data | |
151 | * within blocks of 8 bytes. So two consecutive values of the | |
152 | * phy_src_addr[] array are actually swapped in big-endian, which | |
153 | * explains the different mv_phy_src_idx() implementation. | |
154 | */ | |
155 | #if defined(__LITTLE_ENDIAN) | |
ff7b0479 SB |
156 | struct mv_xor_desc { |
157 | u32 status; /* descriptor execution status */ | |
158 | u32 crc32_result; /* result of CRC-32 calculation */ | |
159 | u32 desc_command; /* type of operation to be carried out */ | |
160 | u32 phy_next_desc; /* next descriptor address pointer */ | |
161 | u32 byte_count; /* size of src/dst blocks in bytes */ | |
162 | u32 phy_dest_addr; /* destination block address */ | |
163 | u32 phy_src_addr[8]; /* source block addresses */ | |
164 | u32 reserved0; | |
165 | u32 reserved1; | |
166 | }; | |
e03bc654 TP |
167 | #define mv_phy_src_idx(src_idx) (src_idx) |
168 | #else | |
169 | struct mv_xor_desc { | |
170 | u32 crc32_result; /* result of CRC-32 calculation */ | |
171 | u32 status; /* descriptor execution status */ | |
172 | u32 phy_next_desc; /* next descriptor address pointer */ | |
173 | u32 desc_command; /* type of operation to be carried out */ | |
174 | u32 phy_dest_addr; /* destination block address */ | |
175 | u32 byte_count; /* size of src/dst blocks in bytes */ | |
176 | u32 phy_src_addr[8]; /* source block addresses */ | |
177 | u32 reserved1; | |
178 | u32 reserved0; | |
179 | }; | |
180 | #define mv_phy_src_idx(src_idx) (src_idx ^ 1) | |
181 | #endif | |
ff7b0479 SB |
182 | |
183 | #define to_mv_sw_desc(addr_hw_desc) \ | |
184 | container_of(addr_hw_desc, struct mv_xor_desc_slot, hw_desc) | |
185 | ||
186 | #define mv_hw_desc_slot_idx(hw_desc, idx) \ | |
187 | ((void *)(((unsigned long)hw_desc) + ((idx) << 5))) | |
188 | ||
ff7b0479 | 189 | #endif |