From: Krishna Gudipati Date: Mon, 13 Jun 2011 22:39:36 +0000 (-0700) Subject: [SCSI] bfa: Introduced generic address len pair to represent DMA memory chunk. X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=85ce928dbb87585042e7dfebe513f724eadebd5e;p=mv-sheeva.git [SCSI] bfa: Introduced generic address len pair to represent DMA memory chunk. - Avoid the use of hardware defined structure bfi_sge_s for DMA requests in host. - Defined a generic address len pair to represent a DMA memory chunk (bfi_alen_s). Signed-off-by: Krishna Gudipati Signed-off-by: James Bottomley --- diff --git a/drivers/scsi/bfa/bfa_ioc.h b/drivers/scsi/bfa/bfa_ioc.h index c85182a704f..62318d24f85 100644 --- a/drivers/scsi/bfa/bfa_ioc.h +++ b/drivers/scsi/bfa/bfa_ioc.h @@ -112,18 +112,6 @@ struct bfa_dma_s { #define BFI_SMEM_CB_SIZE 0x200000U /* ! 2MB for crossbow */ #define BFI_SMEM_CT_SIZE 0x280000U /* ! 2.5MB for catapult */ - -#define bfa_dma_addr_set(dma_addr, pa) \ - __bfa_dma_addr_set(&dma_addr, (u64)pa) - -static inline void -__bfa_dma_addr_set(union bfi_addr_u *dma_addr, u64 pa) -{ - dma_addr->a32.addr_lo = (__be32) pa; - dma_addr->a32.addr_hi = (__be32) (pa >> 32); -} - - #define bfa_dma_be_addr_set(dma_addr, pa) \ __bfa_dma_be_addr_set(&dma_addr, (u64)pa) static inline void @@ -133,6 +121,16 @@ __bfa_dma_be_addr_set(union bfi_addr_u *dma_addr, u64 pa) dma_addr->a32.addr_hi = cpu_to_be32(pa >> 32); } +#define bfa_alen_set(__alen, __len, __pa) \ + __bfa_alen_set(__alen, __len, (u64)__pa) + +static inline void +__bfa_alen_set(struct bfi_alen_s *alen, u32 len, u64 pa) +{ + alen->al_len = cpu_to_be32(len); + bfa_dma_be_addr_set(alen->al_addr, pa); +} + struct bfa_ioc_regs_s { void __iomem *hfn_mbox_cmd; void __iomem *hfn_mbox; diff --git a/drivers/scsi/bfa/bfa_svc.c b/drivers/scsi/bfa/bfa_svc.c index 16d9a5f61c1..d1674c6058e 100644 --- a/drivers/scsi/bfa/bfa_svc.c +++ b/drivers/scsi/bfa/bfa_svc.c @@ -749,23 +749,6 @@ hal_fcxp_send_comp(struct bfa_s *bfa, struct bfi_fcxp_send_rsp_s *fcxp_rsp) } } -static void -hal_fcxp_set_local_sges(struct bfi_sge_s *sge, u32 reqlen, u64 req_pa) -{ - union bfi_addr_u sga_zero = { {0} }; - - sge->sg_len = reqlen; - sge->flags = BFI_SGE_DATA_LAST; - bfa_dma_addr_set(sge[0].sga, req_pa); - bfa_sge_to_be(sge); - sge++; - - sge->sga = sga_zero; - sge->sg_len = reqlen; - sge->flags = BFI_SGE_PGDLEN; - bfa_sge_to_be(sge); -} - static void hal_fcxp_tx_plog(struct bfa_s *bfa, u32 reqlen, struct bfa_fcxp_s *fcxp, struct fchs_s *fchs) @@ -873,18 +856,16 @@ bfa_fcxp_queue(struct bfa_fcxp_s *fcxp, struct bfi_fcxp_send_req_s *send_req) * setup req sgles */ if (fcxp->use_ireqbuf == 1) { - hal_fcxp_set_local_sges(send_req->req_sge, reqi->req_tot_len, + bfa_alen_set(&send_req->req_alen, reqi->req_tot_len, BFA_FCXP_REQ_PLD_PA(fcxp)); } else { if (fcxp->nreq_sgles > 0) { WARN_ON(fcxp->nreq_sgles != 1); - hal_fcxp_set_local_sges(send_req->req_sge, - reqi->req_tot_len, - fcxp->req_sga_cbfn(fcxp->caller, - 0)); + bfa_alen_set(&send_req->req_alen, reqi->req_tot_len, + fcxp->req_sga_cbfn(fcxp->caller, 0)); } else { WARN_ON(reqi->req_tot_len != 0); - hal_fcxp_set_local_sges(send_req->rsp_sge, 0, 0); + bfa_alen_set(&send_req->rsp_alen, 0, 0); } } @@ -894,19 +875,17 @@ bfa_fcxp_queue(struct bfa_fcxp_s *fcxp, struct bfi_fcxp_send_req_s *send_req) if (fcxp->use_irspbuf == 1) { WARN_ON(rspi->rsp_maxlen > BFA_FCXP_MAX_LBUF_SZ); - hal_fcxp_set_local_sges(send_req->rsp_sge, rspi->rsp_maxlen, + bfa_alen_set(&send_req->rsp_alen, rspi->rsp_maxlen, BFA_FCXP_RSP_PLD_PA(fcxp)); - } else { if (fcxp->nrsp_sgles > 0) { WARN_ON(fcxp->nrsp_sgles != 1); - hal_fcxp_set_local_sges(send_req->rsp_sge, - rspi->rsp_maxlen, - fcxp->rsp_sga_cbfn(fcxp->caller, - 0)); + bfa_alen_set(&send_req->rsp_alen, rspi->rsp_maxlen, + fcxp->rsp_sga_cbfn(fcxp->caller, 0)); + } else { WARN_ON(rspi->rsp_maxlen != 0); - hal_fcxp_set_local_sges(send_req->rsp_sge, 0, 0); + bfa_alen_set(&send_req->rsp_alen, 0, 0); } } @@ -4801,8 +4780,6 @@ static void claim_uf_post_msgs(struct bfa_uf_mod_s *ufm, struct bfa_meminfo_s *mi) { struct bfi_uf_buf_post_s *uf_bp_msg; - struct bfi_sge_s *sge; - union bfi_addr_u sga_zero = { {0} }; u16 i; u16 buf_len; @@ -4818,17 +4795,7 @@ claim_uf_post_msgs(struct bfa_uf_mod_s *ufm, struct bfa_meminfo_s *mi) uf_bp_msg->buf_len = cpu_to_be16(buf_len); bfi_h2i_set(uf_bp_msg->mh, BFI_MC_UF, BFI_UF_H2I_BUF_POST, bfa_lpuid(ufm->bfa)); - - sge = uf_bp_msg->sge; - sge[0].sg_len = buf_len; - sge[0].flags = BFI_SGE_DATA_LAST; - bfa_dma_addr_set(sge[0].sga, ufm_pbs_pa(ufm, i)); - bfa_sge_to_be(sge); - - sge[1].sg_len = buf_len; - sge[1].flags = BFI_SGE_PGDLEN; - sge[1].sga = sga_zero; - bfa_sge_to_be(&sge[1]); + bfa_alen_set(&uf_bp_msg->alen, buf_len, ufm_pbs_pa(ufm, i)); } /* diff --git a/drivers/scsi/bfa/bfi.h b/drivers/scsi/bfa/bfi.h index 72b69a0c3b5..6ef1ba50ecf 100644 --- a/drivers/scsi/bfa/bfi.h +++ b/drivers/scsi/bfa/bfi.h @@ -101,7 +101,7 @@ union bfi_addr_u { }; /* - * Scatter Gather Element + * Scatter Gather Element used for fast-path IO requests */ struct bfi_sge_s { #ifdef __BIG_ENDIAN @@ -116,6 +116,14 @@ struct bfi_sge_s { union bfi_addr_u sga; }; +/** + * Generic DMA addr-len pair. + */ +struct bfi_alen_s { + union bfi_addr_u al_addr; /* DMA addr of buffer */ + u32 al_len; /* length of buffer */ +}; + /* * Scatter Gather Page */ diff --git a/drivers/scsi/bfa/bfi_ms.h b/drivers/scsi/bfa/bfi_ms.h index 19e888a5755..a29d905fe8c 100644 --- a/drivers/scsi/bfa/bfi_ms.h +++ b/drivers/scsi/bfa/bfi_ms.h @@ -297,8 +297,8 @@ struct bfi_fcxp_send_req_s { struct fchs_s fchs; /* request FC header structure */ __be32 req_len; /* request payload length */ __be32 rsp_maxlen; /* max response length expected */ - struct bfi_sge_s req_sge[BFA_FCXP_MAX_SGES]; /* request buf */ - struct bfi_sge_s rsp_sge[BFA_FCXP_MAX_SGES]; /* response buf */ + struct bfi_alen_s req_alen; /* request buffer */ + struct bfi_alen_s rsp_alen; /* response buffer */ }; /* @@ -328,7 +328,7 @@ struct bfi_uf_buf_post_s { struct bfi_mhdr_s mh; /* Common msg header */ u16 buf_tag; /* buffer tag */ __be16 buf_len; /* total buffer length */ - struct bfi_sge_s sge[BFA_UF_MAX_SGES]; /* buffer DMA SGEs */ + struct bfi_alen_s alen; /* buffer address/len pair */ }; struct bfi_uf_frm_rcvd_s {