diff options
Diffstat (limited to 'include/net/mana/hw_channel.h')
| -rw-r--r-- | include/net/mana/hw_channel.h | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/include/net/mana/hw_channel.h b/include/net/mana/hw_channel.h new file mode 100644 index 000000000000..6a757a6e2732 --- /dev/null +++ b/include/net/mana/hw_channel.h @@ -0,0 +1,195 @@ +/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ +/* Copyright (c) 2021, Microsoft Corporation. */ + +#ifndef _HW_CHANNEL_H +#define _HW_CHANNEL_H + +#define DEFAULT_LOG2_THROTTLING_FOR_ERROR_EQ 4 + +#define HW_CHANNEL_MAX_REQUEST_SIZE 0x1000 +#define HW_CHANNEL_MAX_RESPONSE_SIZE 0x1000 + +#define HW_CHANNEL_VF_BOOTSTRAP_QUEUE_DEPTH 1 + +#define HWC_INIT_DATA_CQID 1 +#define HWC_INIT_DATA_RQID 2 +#define HWC_INIT_DATA_SQID 3 +#define HWC_INIT_DATA_QUEUE_DEPTH 4 +#define HWC_INIT_DATA_MAX_REQUEST 5 +#define HWC_INIT_DATA_MAX_RESPONSE 6 +#define HWC_INIT_DATA_MAX_NUM_CQS 7 +#define HWC_INIT_DATA_PDID 8 +#define HWC_INIT_DATA_GPA_MKEY 9 +#define HWC_INIT_DATA_PF_DEST_RQ_ID 10 +#define HWC_INIT_DATA_PF_DEST_CQ_ID 11 + +/* Structures labeled with "HW DATA" are exchanged with the hardware. All of + * them are naturally aligned and hence don't need __packed. + */ + +union hwc_init_eq_id_db { + u32 as_uint32; + + struct { + u32 eq_id : 16; + u32 doorbell : 16; + }; +}; /* HW DATA */ + +union hwc_init_type_data { + u32 as_uint32; + + struct { + u32 value : 24; + u32 type : 8; + }; +}; /* HW DATA */ + +struct hwc_rx_oob { + u32 type : 6; + u32 eom : 1; + u32 som : 1; + u32 vendor_err : 8; + u32 reserved1 : 16; + + u32 src_virt_wq : 24; + u32 src_vfid : 8; + + u32 reserved2; + + union { + u32 wqe_addr_low; + u32 wqe_offset; + }; + + u32 wqe_addr_high; + + u32 client_data_unit : 14; + u32 reserved3 : 18; + + u32 tx_oob_data_size; + + u32 chunk_offset : 21; + u32 reserved4 : 11; +}; /* HW DATA */ + +struct hwc_tx_oob { + u32 reserved1; + + u32 reserved2; + + u32 vrq_id : 24; + u32 dest_vfid : 8; + + u32 vrcq_id : 24; + u32 reserved3 : 8; + + u32 vscq_id : 24; + u32 loopback : 1; + u32 lso_override: 1; + u32 dest_pf : 1; + u32 reserved4 : 5; + + u32 vsq_id : 24; + u32 reserved5 : 8; +}; /* HW DATA */ + +struct hwc_work_request { + void *buf_va; + void *buf_sge_addr; + u32 buf_len; + u32 msg_size; + + struct gdma_wqe_request wqe_req; + struct hwc_tx_oob tx_oob; + + struct gdma_sge sge; +}; + +/* hwc_dma_buf represents the array of in-flight WQEs. + * mem_info as know as the GDMA mapped memory is partitioned and used by + * in-flight WQEs. + * The number of WQEs is determined by the number of in-flight messages. + */ +struct hwc_dma_buf { + struct gdma_mem_info mem_info; + + u32 gpa_mkey; + + u32 num_reqs; + struct hwc_work_request reqs[]; +}; + +typedef void hwc_rx_event_handler_t(void *ctx, u32 gdma_rxq_id, + const struct hwc_rx_oob *rx_oob); + +typedef void hwc_tx_event_handler_t(void *ctx, u32 gdma_txq_id, + const struct hwc_rx_oob *rx_oob); + +struct hwc_cq { + struct hw_channel_context *hwc; + + struct gdma_queue *gdma_cq; + struct gdma_queue *gdma_eq; + struct gdma_comp *comp_buf; + u16 queue_depth; + + hwc_rx_event_handler_t *rx_event_handler; + void *rx_event_ctx; + + hwc_tx_event_handler_t *tx_event_handler; + void *tx_event_ctx; +}; + +struct hwc_wq { + struct hw_channel_context *hwc; + + struct gdma_queue *gdma_wq; + struct hwc_dma_buf *msg_buf; + u16 queue_depth; + + struct hwc_cq *hwc_cq; +}; + +struct hwc_caller_ctx { + struct completion comp_event; + void *output_buf; + u32 output_buflen; + + u32 error; /* Linux error code */ + u32 status_code; +}; + +struct hw_channel_context { + struct gdma_dev *gdma_dev; + struct device *dev; + + u16 num_inflight_msg; + u32 max_req_msg_size; + + u16 hwc_init_q_depth_max; + u32 hwc_init_max_req_msg_size; + u32 hwc_init_max_resp_msg_size; + + struct completion hwc_init_eqe_comp; + + struct hwc_wq *rxq; + struct hwc_wq *txq; + struct hwc_cq *cq; + + struct semaphore sema; + struct gdma_resource inflight_msg_res; + + u32 pf_dest_vrq_id; + u32 pf_dest_vrcq_id; + + struct hwc_caller_ctx *caller_ctx; +}; + +int mana_hwc_create_channel(struct gdma_context *gc); +void mana_hwc_destroy_channel(struct gdma_context *gc); + +int mana_hwc_send_request(struct hw_channel_context *hwc, u32 req_len, + const void *req, u32 resp_len, void *resp); + +#endif /* _HW_CHANNEL_H */ |