| /* |
| * Copyright (c) 2009-2010 Chelsio, Inc. All rights reserved. |
| * |
| * This software is available to you under a choice of one of two |
| * licenses. You may choose to be licensed under the terms of the GNU |
| * General Public License (GPL) Version 2, available from the file |
| * COPYING in the main directory of this source tree, or the |
| * OpenIB.org BSD license below: |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer. |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials |
| * provided with the distribution. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| #ifndef __T4_H__ |
| #define __T4_H__ |
| |
| #include "t4_hw.h" |
| #include "t4_regs.h" |
| #include "t4_msg.h" |
| #include "t4fw_ri_api.h" |
| |
| #define T4_MAX_NUM_PD 65536 |
| #define T4_MAX_MR_SIZE (~0ULL) |
| #define T4_PAGESIZE_MASK 0xffff000 /* 4KB-128MB */ |
| #define T4_STAG_UNSET 0xffffffff |
| #define T4_FW_MAJ 0 |
| #define PCIE_MA_SYNC_A 0x30b4 |
| |
| struct t4_status_page { |
| __be32 rsvd1; /* flit 0 - hw owns */ |
| __be16 rsvd2; |
| __be16 qid; |
| __be16 cidx; |
| __be16 pidx; |
| u8 qp_err; /* flit 1 - sw owns */ |
| u8 db_off; |
| u8 pad; |
| u16 host_wq_pidx; |
| u16 host_cidx; |
| u16 host_pidx; |
| }; |
| |
| #define T4_EQ_ENTRY_SIZE 64 |
| |
| #define T4_SQ_NUM_SLOTS 5 |
| #define T4_SQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_SQ_NUM_SLOTS) |
| #define T4_MAX_SEND_SGE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \ |
| sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge)) |
| #define T4_MAX_SEND_INLINE ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_send_wr) - \ |
| sizeof(struct fw_ri_immd))) |
| #define T4_MAX_WRITE_INLINE ((T4_SQ_NUM_BYTES - \ |
| sizeof(struct fw_ri_rdma_write_wr) - \ |
| sizeof(struct fw_ri_immd))) |
| #define T4_MAX_WRITE_SGE ((T4_SQ_NUM_BYTES - \ |
| sizeof(struct fw_ri_rdma_write_wr) - \ |
| sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge)) |
| #define T4_MAX_FR_IMMD ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_fr_nsmr_wr) - \ |
| sizeof(struct fw_ri_immd)) & ~31UL) |
| #define T4_MAX_FR_IMMD_DEPTH (T4_MAX_FR_IMMD / sizeof(u64)) |
| #define T4_MAX_FR_DSGL 1024 |
| #define T4_MAX_FR_DSGL_DEPTH (T4_MAX_FR_DSGL / sizeof(u64)) |
| |
| static inline int t4_max_fr_depth(int use_dsgl) |
| { |
| return use_dsgl ? T4_MAX_FR_DSGL_DEPTH : T4_MAX_FR_IMMD_DEPTH; |
| } |
| |
| #define T4_RQ_NUM_SLOTS 2 |
| #define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS) |
| #define T4_MAX_RECV_SGE 4 |
| |
| union t4_wr { |
| struct fw_ri_res_wr res; |
| struct fw_ri_wr ri; |
| struct fw_ri_rdma_write_wr write; |
| struct fw_ri_send_wr send; |
| struct fw_ri_rdma_read_wr read; |
| struct fw_ri_bind_mw_wr bind; |
| struct fw_ri_fr_nsmr_wr fr; |
| struct fw_ri_inv_lstag_wr inv; |
| struct t4_status_page status; |
| __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_SQ_NUM_SLOTS]; |
| }; |
| |
| union t4_recv_wr { |
| struct fw_ri_recv_wr recv; |
| struct t4_status_page status; |
| __be64 flits[T4_EQ_ENTRY_SIZE / sizeof(__be64) * T4_RQ_NUM_SLOTS]; |
| }; |
| |
| static inline void init_wr_hdr(union t4_wr *wqe, u16 wrid, |
| enum fw_wr_opcodes opcode, u8 flags, u8 len16) |
| { |
| wqe->send.opcode = (u8)opcode; |
| wqe->send.flags = flags; |
| wqe->send.wrid = wrid; |
| wqe->send.r1[0] = 0; |
| wqe->send.r1[1] = 0; |
| wqe->send.r1[2] = 0; |
| wqe->send.len16 = len16; |
| } |
| |
| /* CQE/AE status codes */ |
| #define T4_ERR_SUCCESS 0x0 |
| #define T4_ERR_STAG 0x1 /* STAG invalid: either the */ |
| /* STAG is offlimt, being 0, */ |
| /* or STAG_key mismatch */ |
| #define T4_ERR_PDID 0x2 /* PDID mismatch */ |
| #define T4_ERR_QPID 0x3 /* QPID mismatch */ |
| #define T4_ERR_ACCESS 0x4 /* Invalid access right */ |
| #define T4_ERR_WRAP 0x5 /* Wrap error */ |
| #define T4_ERR_BOUND 0x6 /* base and bounds voilation */ |
| #define T4_ERR_INVALIDATE_SHARED_MR 0x7 /* attempt to invalidate a */ |
| /* shared memory region */ |
| #define T4_ERR_INVALIDATE_MR_WITH_MW_BOUND 0x8 /* attempt to invalidate a */ |
| /* shared memory region */ |
| #define T4_ERR_ECC 0x9 /* ECC error detected */ |
| #define T4_ERR_ECC_PSTAG 0xA /* ECC error detected when */ |
| /* reading PSTAG for a MW */ |
| /* Invalidate */ |
| #define T4_ERR_PBL_ADDR_BOUND 0xB /* pbl addr out of bounds: */ |
| /* software error */ |
| #define T4_ERR_SWFLUSH 0xC /* SW FLUSHED */ |
| #define T4_ERR_CRC 0x10 /* CRC error */ |
| #define T4_ERR_MARKER 0x11 /* Marker error */ |
| #define T4_ERR_PDU_LEN_ERR 0x12 /* invalid PDU length */ |
| #define T4_ERR_OUT_OF_RQE 0x13 /* out of RQE */ |
| #define T4_ERR_DDP_VERSION 0x14 /* wrong DDP version */ |
| #define T4_ERR_RDMA_VERSION 0x15 /* wrong RDMA version */ |
| #define T4_ERR_OPCODE 0x16 /* invalid rdma opcode */ |
| #define T4_ERR_DDP_QUEUE_NUM 0x17 /* invalid ddp queue number */ |
| #define T4_ERR_MSN 0x18 /* MSN error */ |
| #define T4_ERR_TBIT 0x19 /* tag bit not set correctly */ |
| #define T4_ERR_MO 0x1A /* MO not 0 for TERMINATE */ |
| /* or READ_REQ */ |
| #define T4_ERR_MSN_GAP 0x1B |
| #define T4_ERR_MSN_RANGE 0x1C |
| #define T4_ERR_IRD_OVERFLOW 0x1D |
| #define T4_ERR_RQE_ADDR_BOUND 0x1E /* RQE addr out of bounds: */ |
| /* software error */ |
| #define T4_ERR_INTERNAL_ERR 0x1F /* internal error (opcode */ |
| /* mismatch) */ |
| /* |
| * CQE defs |
| */ |
| struct t4_cqe { |
| __be32 header; |
| __be32 len; |
| union { |
| struct { |
| __be32 stag; |
| __be32 msn; |
| } rcqe; |
| struct { |
| u32 nada1; |
| u16 nada2; |
| u16 cidx; |
| } scqe; |
| struct { |
| __be32 wrid_hi; |
| __be32 wrid_low; |
| } gen; |
| } u; |
| __be64 reserved; |
| __be64 bits_type_ts; |
| }; |
| |
| /* macros for flit 0 of the cqe */ |
| |
| #define CQE_QPID_S 12 |
| #define CQE_QPID_M 0xFFFFF |
| #define CQE_QPID_G(x) ((((x) >> CQE_QPID_S)) & CQE_QPID_M) |
| #define CQE_QPID_V(x) ((x)<<CQE_QPID_S) |
| |
| #define CQE_SWCQE_S 11 |
| #define CQE_SWCQE_M 0x1 |
| #define CQE_SWCQE_G(x) ((((x) >> CQE_SWCQE_S)) & CQE_SWCQE_M) |
| #define CQE_SWCQE_V(x) ((x)<<CQE_SWCQE_S) |
| |
| #define CQE_STATUS_S 5 |
| #define CQE_STATUS_M 0x1F |
| #define CQE_STATUS_G(x) ((((x) >> CQE_STATUS_S)) & CQE_STATUS_M) |
| #define CQE_STATUS_V(x) ((x)<<CQE_STATUS_S) |
| |
| #define CQE_TYPE_S 4 |
| #define CQE_TYPE_M 0x1 |
| #define CQE_TYPE_G(x) ((((x) >> CQE_TYPE_S)) & CQE_TYPE_M) |
| #define CQE_TYPE_V(x) ((x)<<CQE_TYPE_S) |
| |
| #define CQE_OPCODE_S 0 |
| #define CQE_OPCODE_M 0xF |
| #define CQE_OPCODE_G(x) ((((x) >> CQE_OPCODE_S)) & CQE_OPCODE_M) |
| #define CQE_OPCODE_V(x) ((x)<<CQE_OPCODE_S) |
| |
| #define SW_CQE(x) (CQE_SWCQE_G(be32_to_cpu((x)->header))) |
| #define CQE_QPID(x) (CQE_QPID_G(be32_to_cpu((x)->header))) |
| #define CQE_TYPE(x) (CQE_TYPE_G(be32_to_cpu((x)->header))) |
| #define SQ_TYPE(x) (CQE_TYPE((x))) |
| #define RQ_TYPE(x) (!CQE_TYPE((x))) |
| #define CQE_STATUS(x) (CQE_STATUS_G(be32_to_cpu((x)->header))) |
| #define CQE_OPCODE(x) (CQE_OPCODE_G(be32_to_cpu((x)->header))) |
| |
| #define CQE_SEND_OPCODE(x)( \ |
| (CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND) || \ |
| (CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE) || \ |
| (CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_INV) || \ |
| (CQE_OPCODE_G(be32_to_cpu((x)->header)) == FW_RI_SEND_WITH_SE_INV)) |
| |
| #define CQE_LEN(x) (be32_to_cpu((x)->len)) |
| |
| /* used for RQ completion processing */ |
| #define CQE_WRID_STAG(x) (be32_to_cpu((x)->u.rcqe.stag)) |
| #define CQE_WRID_MSN(x) (be32_to_cpu((x)->u.rcqe.msn)) |
| |
| /* used for SQ completion processing */ |
| #define CQE_WRID_SQ_IDX(x) ((x)->u.scqe.cidx) |
| |
| /* generic accessor macros */ |
| #define CQE_WRID_HI(x) (be32_to_cpu((x)->u.gen.wrid_hi)) |
| #define CQE_WRID_LOW(x) (be32_to_cpu((x)->u.gen.wrid_low)) |
| |
| /* macros for flit 3 of the cqe */ |
| #define CQE_GENBIT_S 63 |
| #define CQE_GENBIT_M 0x1 |
| #define CQE_GENBIT_G(x) (((x) >> CQE_GENBIT_S) & CQE_GENBIT_M) |
| #define CQE_GENBIT_V(x) ((x)<<CQE_GENBIT_S) |
| |
| #define CQE_OVFBIT_S 62 |
| #define CQE_OVFBIT_M 0x1 |
| #define CQE_OVFBIT_G(x) ((((x) >> CQE_OVFBIT_S)) & CQE_OVFBIT_M) |
| |
| #define CQE_IQTYPE_S 60 |
| #define CQE_IQTYPE_M 0x3 |
| #define CQE_IQTYPE_G(x) ((((x) >> CQE_IQTYPE_S)) & CQE_IQTYPE_M) |
| |
| #define CQE_TS_M 0x0fffffffffffffffULL |
| #define CQE_TS_G(x) ((x) & CQE_TS_M) |
| |
| #define CQE_OVFBIT(x) ((unsigned)CQE_OVFBIT_G(be64_to_cpu((x)->bits_type_ts))) |
| #define CQE_GENBIT(x) ((unsigned)CQE_GENBIT_G(be64_to_cpu((x)->bits_type_ts))) |
| #define CQE_TS(x) (CQE_TS_G(be64_to_cpu((x)->bits_type_ts))) |
| |
| struct t4_swsqe { |
| u64 wr_id; |
| struct t4_cqe cqe; |
| int read_len; |
| int opcode; |
| int complete; |
| int signaled; |
| u16 idx; |
| int flushed; |
| struct timespec host_ts; |
| u64 sge_ts; |
| }; |
| |
| static inline pgprot_t t4_pgprot_wc(pgprot_t prot) |
| { |
| #if defined(__i386__) || defined(__x86_64__) || defined(CONFIG_PPC64) |
| return pgprot_writecombine(prot); |
| #else |
| return pgprot_noncached(prot); |
| #endif |
| } |
| |
| enum { |
| T4_SQ_ONCHIP = (1<<0), |
| }; |
| |
| struct t4_sq { |
| union t4_wr *queue; |
| dma_addr_t dma_addr; |
| DEFINE_DMA_UNMAP_ADDR(mapping); |
| unsigned long phys_addr; |
| struct t4_swsqe *sw_sq; |
| struct t4_swsqe *oldest_read; |
| u64 __iomem *udb; |
| size_t memsize; |
| u32 qid; |
| u16 in_use; |
| u16 size; |
| u16 cidx; |
| u16 pidx; |
| u16 wq_pidx; |
| u16 wq_pidx_inc; |
| u16 flags; |
| short flush_cidx; |
| }; |
| |
| struct t4_swrqe { |
| u64 wr_id; |
| struct timespec host_ts; |
| u64 sge_ts; |
| }; |
| |
| struct t4_rq { |
| union t4_recv_wr *queue; |
| dma_addr_t dma_addr; |
| DEFINE_DMA_UNMAP_ADDR(mapping); |
| struct t4_swrqe *sw_rq; |
| u64 __iomem *udb; |
| size_t memsize; |
| u32 qid; |
| u32 msn; |
| u32 rqt_hwaddr; |
| u16 rqt_size; |
| u16 in_use; |
| u16 size; |
| u16 cidx; |
| u16 pidx; |
| u16 wq_pidx; |
| u16 wq_pidx_inc; |
| }; |
| |
| struct t4_wq { |
| struct t4_sq sq; |
| struct t4_rq rq; |
| void __iomem *db; |
| void __iomem *gts; |
| struct c4iw_rdev *rdev; |
| int flushed; |
| }; |
| |
| static inline int t4_rqes_posted(struct t4_wq *wq) |
| { |
| return wq->rq.in_use; |
| } |
| |
| static inline int t4_rq_empty(struct t4_wq *wq) |
| { |
| return wq->rq.in_use == 0; |
| } |
| |
| static inline int t4_rq_full(struct t4_wq *wq) |
| { |
| return wq->rq.in_use == (wq->rq.size - 1); |
| } |
| |
| static inline u32 t4_rq_avail(struct t4_wq *wq) |
| { |
| return wq->rq.size - 1 - wq->rq.in_use; |
| } |
| |
| static inline void t4_rq_produce(struct t4_wq *wq, u8 len16) |
| { |
| wq->rq.in_use++; |
| if (++wq->rq.pidx == wq->rq.size) |
| wq->rq.pidx = 0; |
| wq->rq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); |
| if (wq->rq.wq_pidx >= wq->rq.size * T4_RQ_NUM_SLOTS) |
| wq->rq.wq_pidx %= wq->rq.size * T4_RQ_NUM_SLOTS; |
| } |
| |
| static inline void t4_rq_consume(struct t4_wq *wq) |
| { |
| wq->rq.in_use--; |
| wq->rq.msn++; |
| if (++wq->rq.cidx == wq->rq.size) |
| wq->rq.cidx = 0; |
| } |
| |
| static inline u16 t4_rq_host_wq_pidx(struct t4_wq *wq) |
| { |
| return wq->rq.queue[wq->rq.size].status.host_wq_pidx; |
| } |
| |
| static inline u16 t4_rq_wq_size(struct t4_wq *wq) |
| { |
| return wq->rq.size * T4_RQ_NUM_SLOTS; |
| } |
| |
| static inline int t4_sq_onchip(struct t4_sq *sq) |
| { |
| return sq->flags & T4_SQ_ONCHIP; |
| } |
| |
| static inline int t4_sq_empty(struct t4_wq *wq) |
| { |
| return wq->sq.in_use == 0; |
| } |
| |
| static inline int t4_sq_full(struct t4_wq *wq) |
| { |
| return wq->sq.in_use == (wq->sq.size - 1); |
| } |
| |
| static inline u32 t4_sq_avail(struct t4_wq *wq) |
| { |
| return wq->sq.size - 1 - wq->sq.in_use; |
| } |
| |
| static inline void t4_sq_produce(struct t4_wq *wq, u8 len16) |
| { |
| wq->sq.in_use++; |
| if (++wq->sq.pidx == wq->sq.size) |
| wq->sq.pidx = 0; |
| wq->sq.wq_pidx += DIV_ROUND_UP(len16*16, T4_EQ_ENTRY_SIZE); |
| if (wq->sq.wq_pidx >= wq->sq.size * T4_SQ_NUM_SLOTS) |
| wq->sq.wq_pidx %= wq->sq.size * T4_SQ_NUM_SLOTS; |
| } |
| |
| static inline void t4_sq_consume(struct t4_wq *wq) |
| { |
| BUG_ON(wq->sq.in_use < 1); |
| if (wq->sq.cidx == wq->sq.flush_cidx) |
| wq->sq.flush_cidx = -1; |
| wq->sq.in_use--; |
| if (++wq->sq.cidx == wq->sq.size) |
| wq->sq.cidx = 0; |
| } |
| |
| static inline u16 t4_sq_host_wq_pidx(struct t4_wq *wq) |
| { |
| return wq->sq.queue[wq->sq.size].status.host_wq_pidx; |
| } |
| |
| static inline u16 t4_sq_wq_size(struct t4_wq *wq) |
| { |
| return wq->sq.size * T4_SQ_NUM_SLOTS; |
| } |
| |
| /* This function copies 64 byte coalesced work request to memory |
| * mapped BAR2 space. For coalesced WRs, the SGE fetches data |
| * from the FIFO instead of from Host. |
| */ |
| static inline void pio_copy(u64 __iomem *dst, u64 *src) |
| { |
| int count = 8; |
| |
| while (count) { |
| writeq(*src, dst); |
| src++; |
| dst++; |
| count--; |
| } |
| } |
| |
| static inline void t4_ring_sq_db(struct t4_wq *wq, u16 inc, u8 t5, |
| union t4_wr *wqe) |
| { |
| |
| /* Flush host queue memory writes. */ |
| wmb(); |
| if (t5) { |
| if (inc == 1 && wqe) { |
| PDBG("%s: WC wq->sq.pidx = %d\n", |
| __func__, wq->sq.pidx); |
| pio_copy(wq->sq.udb + 7, (void *)wqe); |
| } else { |
| PDBG("%s: DB wq->sq.pidx = %d\n", |
| __func__, wq->sq.pidx); |
| writel(PIDX_T5_V(inc), wq->sq.udb); |
| } |
| |
| /* Flush user doorbell area writes. */ |
| wmb(); |
| return; |
| } |
| writel(QID_V(wq->sq.qid) | PIDX_V(inc), wq->db); |
| } |
| |
| static inline void t4_ring_rq_db(struct t4_wq *wq, u16 inc, u8 t5, |
| union t4_recv_wr *wqe) |
| { |
| |
| /* Flush host queue memory writes. */ |
| wmb(); |
| if (t5) { |
| if (inc == 1 && wqe) { |
| PDBG("%s: WC wq->rq.pidx = %d\n", |
| __func__, wq->rq.pidx); |
| pio_copy(wq->rq.udb + 7, (void *)wqe); |
| } else { |
| PDBG("%s: DB wq->rq.pidx = %d\n", |
| __func__, wq->rq.pidx); |
| writel(PIDX_T5_V(inc), wq->rq.udb); |
| } |
| |
| /* Flush user doorbell area writes. */ |
| wmb(); |
| return; |
| } |
| writel(QID_V(wq->rq.qid) | PIDX_V(inc), wq->db); |
| } |
| |
| static inline int t4_wq_in_error(struct t4_wq *wq) |
| { |
| return wq->rq.queue[wq->rq.size].status.qp_err; |
| } |
| |
| static inline void t4_set_wq_in_error(struct t4_wq *wq) |
| { |
| wq->rq.queue[wq->rq.size].status.qp_err = 1; |
| } |
| |
| static inline void t4_disable_wq_db(struct t4_wq *wq) |
| { |
| wq->rq.queue[wq->rq.size].status.db_off = 1; |
| } |
| |
| static inline void t4_enable_wq_db(struct t4_wq *wq) |
| { |
| wq->rq.queue[wq->rq.size].status.db_off = 0; |
| } |
| |
| static inline int t4_wq_db_enabled(struct t4_wq *wq) |
| { |
| return !wq->rq.queue[wq->rq.size].status.db_off; |
| } |
| |
| enum t4_cq_flags { |
| CQ_ARMED = 1, |
| }; |
| |
| struct t4_cq { |
| struct t4_cqe *queue; |
| dma_addr_t dma_addr; |
| DEFINE_DMA_UNMAP_ADDR(mapping); |
| struct t4_cqe *sw_queue; |
| void __iomem *gts; |
| struct c4iw_rdev *rdev; |
| u64 ugts; |
| size_t memsize; |
| __be64 bits_type_ts; |
| u32 cqid; |
| int vector; |
| u16 size; /* including status page */ |
| u16 cidx; |
| u16 sw_pidx; |
| u16 sw_cidx; |
| u16 sw_in_use; |
| u16 cidx_inc; |
| u8 gen; |
| u8 error; |
| unsigned long flags; |
| }; |
| |
| static inline int t4_clear_cq_armed(struct t4_cq *cq) |
| { |
| return test_and_clear_bit(CQ_ARMED, &cq->flags); |
| } |
| |
| static inline int t4_arm_cq(struct t4_cq *cq, int se) |
| { |
| u32 val; |
| |
| set_bit(CQ_ARMED, &cq->flags); |
| while (cq->cidx_inc > CIDXINC_M) { |
| val = SEINTARM_V(0) | CIDXINC_V(CIDXINC_M) | TIMERREG_V(7) | |
| INGRESSQID_V(cq->cqid); |
| writel(val, cq->gts); |
| cq->cidx_inc -= CIDXINC_M; |
| } |
| val = SEINTARM_V(se) | CIDXINC_V(cq->cidx_inc) | TIMERREG_V(6) | |
| INGRESSQID_V(cq->cqid); |
| writel(val, cq->gts); |
| cq->cidx_inc = 0; |
| return 0; |
| } |
| |
| static inline void t4_swcq_produce(struct t4_cq *cq) |
| { |
| cq->sw_in_use++; |
| if (cq->sw_in_use == cq->size) { |
| PDBG("%s cxgb4 sw cq overflow cqid %u\n", __func__, cq->cqid); |
| cq->error = 1; |
| BUG_ON(1); |
| } |
| if (++cq->sw_pidx == cq->size) |
| cq->sw_pidx = 0; |
| } |
| |
| static inline void t4_swcq_consume(struct t4_cq *cq) |
| { |
| BUG_ON(cq->sw_in_use < 1); |
| cq->sw_in_use--; |
| if (++cq->sw_cidx == cq->size) |
| cq->sw_cidx = 0; |
| } |
| |
| static inline void t4_hwcq_consume(struct t4_cq *cq) |
| { |
| cq->bits_type_ts = cq->queue[cq->cidx].bits_type_ts; |
| if (++cq->cidx_inc == (cq->size >> 4) || cq->cidx_inc == CIDXINC_M) { |
| u32 val; |
| |
| val = SEINTARM_V(0) | CIDXINC_V(cq->cidx_inc) | TIMERREG_V(7) | |
| INGRESSQID_V(cq->cqid); |
| writel(val, cq->gts); |
| cq->cidx_inc = 0; |
| } |
| if (++cq->cidx == cq->size) { |
| cq->cidx = 0; |
| cq->gen ^= 1; |
| } |
| } |
| |
| static inline int t4_valid_cqe(struct t4_cq *cq, struct t4_cqe *cqe) |
| { |
| return (CQE_GENBIT(cqe) == cq->gen); |
| } |
| |
| static inline int t4_next_hw_cqe(struct t4_cq *cq, struct t4_cqe **cqe) |
| { |
| int ret; |
| u16 prev_cidx; |
| |
| if (cq->cidx == 0) |
| prev_cidx = cq->size - 1; |
| else |
| prev_cidx = cq->cidx - 1; |
| |
| if (cq->queue[prev_cidx].bits_type_ts != cq->bits_type_ts) { |
| ret = -EOVERFLOW; |
| cq->error = 1; |
| printk(KERN_ERR MOD "cq overflow cqid %u\n", cq->cqid); |
| BUG_ON(1); |
| } else if (t4_valid_cqe(cq, &cq->queue[cq->cidx])) { |
| |
| /* Ensure CQE is flushed to memory */ |
| rmb(); |
| *cqe = &cq->queue[cq->cidx]; |
| ret = 0; |
| } else |
| ret = -ENODATA; |
| return ret; |
| } |
| |
| static inline struct t4_cqe *t4_next_sw_cqe(struct t4_cq *cq) |
| { |
| if (cq->sw_in_use == cq->size) { |
| PDBG("%s cxgb4 sw cq overflow cqid %u\n", __func__, cq->cqid); |
| cq->error = 1; |
| BUG_ON(1); |
| return NULL; |
| } |
| if (cq->sw_in_use) |
| return &cq->sw_queue[cq->sw_cidx]; |
| return NULL; |
| } |
| |
| static inline int t4_next_cqe(struct t4_cq *cq, struct t4_cqe **cqe) |
| { |
| int ret = 0; |
| |
| if (cq->error) |
| ret = -ENODATA; |
| else if (cq->sw_in_use) |
| *cqe = &cq->sw_queue[cq->sw_cidx]; |
| else |
| ret = t4_next_hw_cqe(cq, cqe); |
| return ret; |
| } |
| |
| static inline int t4_cq_in_error(struct t4_cq *cq) |
| { |
| return ((struct t4_status_page *)&cq->queue[cq->size])->qp_err; |
| } |
| |
| static inline void t4_set_cq_in_error(struct t4_cq *cq) |
| { |
| ((struct t4_status_page *)&cq->queue[cq->size])->qp_err = 1; |
| } |
| #endif |
| |
| struct t4_dev_status_page { |
| u8 db_off; |
| }; |