1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2021 HiSilicon Limited
8 #include <rte_byteorder.h>
9 #include <rte_common.h>
11 #define BIT(x) (1ul << (x))
12 #define BITS_PER_LONG (__SIZEOF_LONG__ * 8)
13 #define GENMASK(h, l) \
14 (((~0UL) << (l)) & (~0UL >> (BITS_PER_LONG - 1 - (h))))
15 #define BF_SHF(x) (__builtin_ffsll(x) - 1)
16 #define FIELD_GET(mask, reg) \
17 ((typeof(mask))(((reg) & (mask)) >> BF_SHF(mask)))
19 #define lower_32_bits(x) ((uint32_t)(x))
20 #define upper_32_bits(x) ((uint32_t)(((x) >> 16) >> 16))
22 #define PCI_VENDOR_ID_HUAWEI 0x19e5
23 #define HISI_DMA_DEVICE_ID 0xA122
24 #define HISI_DMA_PCI_REVISION_ID_REG 0x08
25 #define HISI_DMA_REVISION_HIP08B 0x21
27 #define HISI_DMA_MAX_HW_QUEUES 4
28 #define HISI_DMA_MAX_DESC_NUM 8192
29 #define HISI_DMA_MIN_DESC_NUM 32
32 * The HIP08B(HiSilicon IP08) and later Chip(e.g. HiSilicon IP09) are DMA iEPs,
33 * they have the same pci device id but with different pci revision.
34 * Unfortunately, they have different register layouts, so the layout
35 * enumerations are defined.
38 HISI_DMA_REG_LAYOUT_INVALID = 0,
39 HISI_DMA_REG_LAYOUT_HIP08
43 * Hardware PCI bar register MAP:
48 * -------------- -> Queue base
54 * | Queue-1 | Queue region
64 * As described above, a single queue register is continuous and occupies the
65 * length of queue-region. The global offset for a single queue register is
67 * offset = queue-base + (queue-id * queue-region) + reg-offset-in-region.
69 * The first part of queue region is basically the same for HIP08 and later chip
70 * register layouts, therefore, HISI_QUEUE_* registers are defined for it.
72 #define HISI_DMA_QUEUE_SQ_BASE_L_REG 0x0
73 #define HISI_DMA_QUEUE_SQ_BASE_H_REG 0x4
74 #define HISI_DMA_QUEUE_SQ_DEPTH_REG 0x8
75 #define HISI_DMA_QUEUE_SQ_TAIL_REG 0xC
76 #define HISI_DMA_QUEUE_CQ_BASE_L_REG 0x10
77 #define HISI_DMA_QUEUE_CQ_BASE_H_REG 0x14
78 #define HISI_DMA_QUEUE_CQ_DEPTH_REG 0x18
79 #define HISI_DMA_QUEUE_CQ_HEAD_REG 0x1C
80 #define HISI_DMA_QUEUE_CTRL0_REG 0x20
81 #define HISI_DMA_QUEUE_CTRL0_EN_B 0
82 #define HISI_DMA_QUEUE_CTRL0_PAUSE_B 4
83 #define HISI_DMA_QUEUE_CTRL1_REG 0x24
84 #define HISI_DMA_QUEUE_CTRL1_RESET_B 0
85 #define HISI_DMA_QUEUE_FSM_REG 0x30
86 #define HISI_DMA_QUEUE_FSM_STS_M GENMASK(3, 0)
87 #define HISI_DMA_QUEUE_INT_STATUS_REG 0x40
88 #define HISI_DMA_QUEUE_ERR_INT_NUM0_REG 0x84
89 #define HISI_DMA_QUEUE_ERR_INT_NUM1_REG 0x88
90 #define HISI_DMA_QUEUE_ERR_INT_NUM2_REG 0x8C
91 #define HISI_DMA_QUEUE_REGION_SIZE 0x100
94 * HiSilicon IP08 DMA register and field define:
96 #define HISI_DMA_HIP08_QUEUE_BASE 0x0
97 #define HISI_DMA_HIP08_QUEUE_CTRL0_ERR_ABORT_B 2
98 #define HISI_DMA_HIP08_QUEUE_INT_MASK_REG 0x44
99 #define HISI_DMA_HIP08_QUEUE_INT_MASK_M GENMASK(14, 0)
100 #define HISI_DMA_HIP08_QUEUE_ERR_INT_NUM3_REG 0x90
101 #define HISI_DMA_HIP08_QUEUE_ERR_INT_NUM4_REG 0x94
102 #define HISI_DMA_HIP08_QUEUE_ERR_INT_NUM5_REG 0x98
103 #define HISI_DMA_HIP08_QUEUE_ERR_INT_NUM6_REG 0x48
104 #define HISI_DMA_HIP08_MODE_REG 0x217C
105 #define HISI_DMA_HIP08_MODE_SEL_B 0
106 #define HISI_DMA_HIP08_DUMP_START_REG 0x2000
107 #define HISI_DMA_HIP08_DUMP_END_REG 0x2280
110 * In fact, there are multiple states, but it need to pay attention to
111 * the following two states for the driver:
114 HISI_DMA_STATE_IDLE = 0,
119 * After scanning the CQ array, the CQ head register needs to be updated.
120 * Updating the register involves write memory barrier operations.
121 * Here use the following method to reduce WMB operations:
122 * a) malloc more CQEs, which correspond to the macro HISI_DMA_CQ_RESERVED.
123 * b) update the CQ head register after accumulated number of completed CQs
124 * is greater than or equal to HISI_DMA_CQ_RESERVED.
126 #define HISI_DMA_CQ_RESERVED 64
128 struct hisi_dma_sqe {
130 #define SQE_FENCE_FLAG BIT(10)
131 #define SQE_OPCODE_M2M 0x4
139 struct hisi_dma_cqe {
142 #define CQE_SQ_HEAD_MASK GENMASK(15, 0)
143 #define CQE_VALID_B BIT(48)
144 #define CQE_STATUS_MASK GENMASK(63, 49)
147 struct hisi_dma_dev {
148 struct hisi_dma_sqe *sqe;
149 volatile struct hisi_dma_cqe *cqe;
150 uint16_t *status; /* the completion status array of SQEs. */
152 volatile void *sq_tail_reg; /**< register address for doorbell. */
153 volatile void *cq_head_reg; /**< register address for answer CQ. */
155 uint16_t sq_depth_mask; /**< SQ depth - 1, the SQ depth is power of 2 */
156 uint16_t cq_depth; /* CQ depth */
158 uint16_t ridx; /**< ring index which will assign to the next request. */
159 /** ring index which returned by hisi_dmadev_completed APIs. */
163 * SQE array management fields:
165 * -----------------------------------------------------
166 * | SQE0 | SQE1 | SQE2 | ... | SQEx | ... | SQEn-1 |
167 * -----------------------------------------------------
170 * sq_head cq_sq_head sq_tail
172 * sq_head: index to the oldest completed request, this filed was
173 * updated by hisi_dmadev_completed* APIs.
174 * sq_tail: index of the next new request, this field was updated by
175 * hisi_dmadev_copy API.
176 * cq_sq_head: next index of index that has been completed by hardware,
177 * this filed was updated by hisi_dmadev_completed* APIs.
179 * [sq_head, cq_sq_head): the SQEs that hardware already completed.
180 * [cq_sq_head, sq_tail): the SQEs that hardware processing.
186 * The driver scans the CQE array, if the valid bit changes, the CQE is
188 * Note: One CQE is corresponding to one or several SQEs, e.g. app
189 * submits two copy requests, the hardware processes the two SQEs,
190 * but it may write back only one CQE and the CQE's sq_head field
191 * indicates the index of the second copy request in the SQE
194 uint16_t cq_head; /**< CQ index for next scans. */
195 /** accumulated number of completed CQs
196 * @see HISI_DMA_CQ_RESERVED
198 uint16_t cqs_completed;
199 uint8_t cqe_vld; /**< valid bit for CQE, will change for every round. */
206 * The following fields are not accessed in the I/O path, so they are
209 struct rte_dma_dev_data *data;
210 uint8_t revision; /**< PCI revision. */
211 uint8_t reg_layout; /**< hardware register layout. */
213 uint8_t queue_id; /**< hardware DMA queue index. */
214 const struct rte_memzone *iomz;
220 #endif /* HISI_DMADEV_H */