diff options
Diffstat (limited to 'drivers/net/ethernet/fungible/funcore/fun_queue.h')
| -rw-r--r-- | drivers/net/ethernet/fungible/funcore/fun_queue.h | 175 |
1 files changed, 175 insertions, 0 deletions
diff --git a/drivers/net/ethernet/fungible/funcore/fun_queue.h b/drivers/net/ethernet/fungible/funcore/fun_queue.h new file mode 100644 index 000000000000..7fb53d0ae8b0 --- /dev/null +++ b/drivers/net/ethernet/fungible/funcore/fun_queue.h @@ -0,0 +1,175 @@ +/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */ + +#ifndef _FUN_QEUEUE_H +#define _FUN_QEUEUE_H + +#include <linux/interrupt.h> +#include <linux/io.h> + +struct device; +struct fun_dev; +struct fun_queue; +struct fun_cqe_info; +struct fun_rsp_common; + +typedef void (*cq_callback_t)(struct fun_queue *funq, void *data, void *msg, + const struct fun_cqe_info *info); + +struct fun_rq_info { + dma_addr_t dma; + struct page *page; +}; + +/* A queue group consisting of an SQ, a CQ, and an optional RQ. */ +struct fun_queue { + struct fun_dev *fdev; + spinlock_t sq_lock; + + dma_addr_t cq_dma_addr; + dma_addr_t sq_dma_addr; + dma_addr_t rq_dma_addr; + + u32 __iomem *cq_db; + u32 __iomem *sq_db; + u32 __iomem *rq_db; + + void *cqes; + void *sq_cmds; + struct fun_eprq_rqbuf *rqes; + struct fun_rq_info *rq_info; + + u32 cqid; + u32 sqid; + u32 rqid; + + u32 cq_depth; + u32 sq_depth; + u32 rq_depth; + + u16 cq_head; + u16 sq_tail; + u16 rq_tail; + + u8 cqe_size_log2; + u8 sqe_size_log2; + + u16 cqe_info_offset; + + u16 rq_buf_idx; + int rq_buf_offset; + u16 num_rqe_to_fill; + + u8 cq_intcoal_usec; + u8 cq_intcoal_nentries; + u8 sq_intcoal_usec; + u8 sq_intcoal_nentries; + + u16 cq_flags; + u16 sq_flags; + u16 rq_flags; + + /* SQ head writeback */ + u16 sq_comp; + + volatile __be64 *sq_head; + + cq_callback_t cq_cb; + void *cb_data; + + irq_handler_t irq_handler; + void *irq_data; + s16 cq_vector; + u8 cq_phase; + + /* I/O q index */ + u16 qid; + + char irqname[24]; +}; + +static inline void *fun_sqe_at(const struct fun_queue *funq, unsigned int pos) +{ + return funq->sq_cmds + (pos << funq->sqe_size_log2); +} + +static inline void funq_sq_post_tail(struct fun_queue *funq, u16 tail) +{ + if (++tail == funq->sq_depth) + tail = 0; + funq->sq_tail = tail; + writel(tail, funq->sq_db); +} + +static inline struct fun_cqe_info *funq_cqe_info(const struct fun_queue *funq, + void *cqe) +{ + return cqe + funq->cqe_info_offset; +} + +static inline void funq_rq_post(struct fun_queue *funq) +{ + writel(funq->rq_tail, funq->rq_db); +} + +struct fun_queue_alloc_req { + u8 cqe_size_log2; + u8 sqe_size_log2; + + u16 cq_flags; + u16 sq_flags; + u16 rq_flags; + + u32 cq_depth; + u32 sq_depth; + u32 rq_depth; + + u8 cq_intcoal_usec; + u8 cq_intcoal_nentries; + u8 sq_intcoal_usec; + u8 sq_intcoal_nentries; +}; + +int fun_sq_create(struct fun_dev *fdev, u16 flags, u32 sqid, u32 cqid, + u8 sqe_size_log2, u32 sq_depth, dma_addr_t dma_addr, + u8 coal_nentries, u8 coal_usec, u32 irq_num, + u32 scan_start_id, u32 scan_end_id, + u32 rq_buf_size_log2, u32 *sqidp, u32 __iomem **dbp); +int fun_cq_create(struct fun_dev *fdev, u16 flags, u32 cqid, u32 rqid, + u8 cqe_size_log2, u32 cq_depth, dma_addr_t dma_addr, + u16 headroom, u16 tailroom, u8 coal_nentries, u8 coal_usec, + u32 irq_num, u32 scan_start_id, u32 scan_end_id, + u32 *cqidp, u32 __iomem **dbp); +void *fun_alloc_ring_mem(struct device *dma_dev, size_t depth, + size_t hw_desc_sz, size_t sw_desc_size, bool wb, + int numa_node, dma_addr_t *dma_addr, void **sw_va, + volatile __be64 **wb_va); +void fun_free_ring_mem(struct device *dma_dev, size_t depth, size_t hw_desc_sz, + bool wb, void *hw_va, dma_addr_t dma_addr, void *sw_va); + +#define fun_destroy_sq(fdev, sqid) \ + fun_res_destroy((fdev), FUN_ADMIN_OP_EPSQ, 0, (sqid)) +#define fun_destroy_cq(fdev, cqid) \ + fun_res_destroy((fdev), FUN_ADMIN_OP_EPCQ, 0, (cqid)) + +struct fun_queue *fun_alloc_queue(struct fun_dev *fdev, int qid, + const struct fun_queue_alloc_req *req); +void fun_free_queue(struct fun_queue *funq); + +static inline void fun_set_cq_callback(struct fun_queue *funq, cq_callback_t cb, + void *cb_data) +{ + funq->cq_cb = cb; + funq->cb_data = cb_data; +} + +int fun_create_rq(struct fun_queue *funq); +int fun_create_queue(struct fun_queue *funq); + +void fun_free_irq(struct fun_queue *funq); +int fun_request_irq(struct fun_queue *funq, const char *devname, + irq_handler_t handler, void *data); + +unsigned int __fun_process_cq(struct fun_queue *funq, unsigned int max); +unsigned int fun_process_cq(struct fun_queue *funq, unsigned int max); + +#endif /* _FUN_QEUEUE_H */ |