From a3f12da0e99a8d17118ee9e18a1f760a0d427b26 Mon Sep 17 00:00:00 2001 From: Steve Wise Date: Tue, 26 Sep 2017 13:07:26 -0700 Subject: [PATCH] iw_cxgb4: allocate wait object for each memory object Remove the local stack allocated c4iw_wr_wait object in preparation for correctly handling timeouts. Also refactored some code to simplify it and make errpath unwinding more readable. Signed-off-by: Steve Wise Signed-off-by: Doug Ledford --- drivers/infiniband/hw/cxgb4/iw_cxgb4.h | 2 + drivers/infiniband/hw/cxgb4/mem.c | 228 +++++++++++++++---------- 2 files changed, 141 insertions(+), 89 deletions(-) diff --git a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h index 433e78e5f25b..0fabe82f7b6d 100644 --- a/drivers/infiniband/hw/cxgb4/iw_cxgb4.h +++ b/drivers/infiniband/hw/cxgb4/iw_cxgb4.h @@ -394,6 +394,7 @@ struct c4iw_mr { dma_addr_t mpl_addr; u32 max_mpl_len; u32 mpl_len; + struct c4iw_wr_wait *wr_waitp; }; static inline struct c4iw_mr *to_c4iw_mr(struct ib_mr *ibmr) @@ -407,6 +408,7 @@ struct c4iw_mw { struct sk_buff *dereg_skb; u64 kva; struct tpt_attributes attr; + struct c4iw_wr_wait *wr_waitp; }; static inline struct c4iw_mw *to_c4iw_mw(struct ib_mw *ibmw) diff --git a/drivers/infiniband/hw/cxgb4/mem.c b/drivers/infiniband/hw/cxgb4/mem.c index eeadc69ad4be..b2523b213c86 100644 --- a/drivers/infiniband/hw/cxgb4/mem.c +++ b/drivers/infiniband/hw/cxgb4/mem.c @@ -60,18 +60,18 @@ static int mr_exceeds_hw_limits(struct c4iw_dev *dev, u64 length) static int _c4iw_write_mem_dma_aligned(struct c4iw_rdev *rdev, u32 addr, u32 len, dma_addr_t data, - int wait, struct sk_buff *skb) + struct sk_buff *skb, + struct c4iw_wr_wait *wr_waitp) { struct ulp_mem_io *req; struct ulptx_sgl *sgl; u8 wr_len; int ret = 0; - struct c4iw_wr_wait wr_wait; addr &= 0x7FFFFFF; - if (wait) - c4iw_init_wr_wait(&wr_wait); + if (wr_waitp) + c4iw_init_wr_wait(wr_waitp); wr_len = roundup(sizeof(*req) + sizeof(*sgl), 16); if (!skb) { @@ -84,8 +84,8 @@ static int _c4iw_write_mem_dma_aligned(struct c4iw_rdev *rdev, u32 addr, req = __skb_put_zero(skb, wr_len); INIT_ULPTX_WR(req, wr_len, 0, 0); req->wr.wr_hi = cpu_to_be32(FW_WR_OP_V(FW_ULPTX_WR) | - (wait ? FW_WR_COMPL_F : 0)); - req->wr.wr_lo = wait ? (__force __be64)(unsigned long) &wr_wait : 0L; + (wr_waitp ? FW_WR_COMPL_F : 0)); + req->wr.wr_lo = wr_waitp ? (__force __be64)(unsigned long)wr_waitp : 0L; req->wr.wr_mid = cpu_to_be32(FW_WR_LEN16_V(DIV_ROUND_UP(wr_len, 16))); req->cmd = cpu_to_be32(ULPTX_CMD_V(ULP_TX_MEM_WRITE) | T5_ULP_MEMIO_ORDER_V(1) | @@ -103,19 +103,19 @@ static int _c4iw_write_mem_dma_aligned(struct c4iw_rdev *rdev, u32 addr, ret = c4iw_ofld_send(rdev, skb); if (ret) return ret; - if (wait) - ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, 0, __func__); + if (wr_waitp) + ret = c4iw_wait_for_reply(rdev, wr_waitp, 0, 0, __func__); return ret; } static int _c4iw_write_mem_inline(struct c4iw_rdev *rdev, u32 addr, u32 len, - void *data, struct sk_buff *skb) + void *data, struct sk_buff *skb, + struct c4iw_wr_wait *wr_waitp) { struct ulp_mem_io *req; struct ulptx_idata *sc; u8 wr_len, *to_dp, *from_dp; int copy_len, num_wqe, i, ret = 0; - struct c4iw_wr_wait wr_wait; __be32 cmd = cpu_to_be32(ULPTX_CMD_V(ULP_TX_MEM_WRITE)); if (is_t4(rdev->lldi.adapter_type)) @@ -126,7 +126,7 @@ static int _c4iw_write_mem_inline(struct c4iw_rdev *rdev, u32 addr, u32 len, addr &= 0x7FFFFFF; pr_debug("addr 0x%x len %u\n", addr, len); num_wqe = DIV_ROUND_UP(len, C4IW_MAX_INLINE_SIZE); - c4iw_init_wr_wait(&wr_wait); + c4iw_init_wr_wait(wr_waitp); for (i = 0; i < num_wqe; i++) { copy_len = len > C4IW_MAX_INLINE_SIZE ? C4IW_MAX_INLINE_SIZE : @@ -147,7 +147,7 @@ static int _c4iw_write_mem_inline(struct c4iw_rdev *rdev, u32 addr, u32 len, if (i == (num_wqe-1)) { req->wr.wr_hi = cpu_to_be32(FW_WR_OP_V(FW_ULPTX_WR) | FW_WR_COMPL_F); - req->wr.wr_lo = (__force __be64)(unsigned long)&wr_wait; + req->wr.wr_lo = (__force __be64)(unsigned long)wr_waitp; } else req->wr.wr_hi = cpu_to_be32(FW_WR_OP_V(FW_ULPTX_WR)); req->wr.wr_mid = cpu_to_be32( @@ -180,12 +180,13 @@ static int _c4iw_write_mem_inline(struct c4iw_rdev *rdev, u32 addr, u32 len, len -= C4IW_MAX_INLINE_SIZE; } - ret = c4iw_wait_for_reply(rdev, &wr_wait, 0, 0, __func__); + ret = c4iw_wait_for_reply(rdev, wr_waitp, 0, 0, __func__); return ret; } static int _c4iw_write_mem_dma(struct c4iw_rdev *rdev, u32 addr, u32 len, - void *data, struct sk_buff *skb) + void *data, struct sk_buff *skb, + struct c4iw_wr_wait *wr_waitp) { u32 remain = len; u32 dmalen; @@ -208,7 +209,7 @@ static int _c4iw_write_mem_dma(struct c4iw_rdev *rdev, u32 addr, u32 len, dmalen = T4_ULPTX_MAX_DMA; remain -= dmalen; ret = _c4iw_write_mem_dma_aligned(rdev, addr, dmalen, daddr, - !remain, skb); + skb, remain ? NULL : wr_waitp); if (ret) goto out; addr += dmalen >> 5; @@ -216,7 +217,8 @@ static int _c4iw_write_mem_dma(struct c4iw_rdev *rdev, u32 addr, u32 len, daddr += dmalen; } if (remain) - ret = _c4iw_write_mem_inline(rdev, addr, remain, data, skb); + ret = _c4iw_write_mem_inline(rdev, addr, remain, data, skb, + wr_waitp); out: dma_unmap_single(&rdev->lldi.pdev->dev, save, len, DMA_TO_DEVICE); return ret; @@ -227,23 +229,33 @@ out: * If data is NULL, clear len byte of memory to zero. */ static int write_adapter_mem(struct c4iw_rdev *rdev, u32 addr, u32 len, - void *data, struct sk_buff *skb) + void *data, struct sk_buff *skb, + struct c4iw_wr_wait *wr_waitp) { - if (rdev->lldi.ulptx_memwrite_dsgl && use_dsgl) { - if (len > inline_threshold) { - if (_c4iw_write_mem_dma(rdev, addr, len, data, skb)) { - pr_warn_ratelimited("%s: dma map failure (non fatal)\n", - pci_name(rdev->lldi.pdev)); - return _c4iw_write_mem_inline(rdev, addr, len, - data, skb); - } else { - return 0; - } - } else - return _c4iw_write_mem_inline(rdev, addr, - len, data, skb); - } else - return _c4iw_write_mem_inline(rdev, addr, len, data, skb); + int ret; + + if (!rdev->lldi.ulptx_memwrite_dsgl || !use_dsgl) { + ret = _c4iw_write_mem_inline(rdev, addr, len, data, skb, + wr_waitp); + goto out; + } + + if (len <= inline_threshold) { + ret = _c4iw_write_mem_inline(rdev, addr, len, data, skb, + wr_waitp); + goto out; + } + + ret = _c4iw_write_mem_dma(rdev, addr, len, data, skb, wr_waitp); + if (ret) { + pr_warn_ratelimited("%s: dma map failure (non fatal)\n", + pci_name(rdev->lldi.pdev)); + ret = _c4iw_write_mem_inline(rdev, addr, len, data, skb, + wr_waitp); + } +out: + return ret; + } /* @@ -257,7 +269,7 @@ static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry, enum fw_ri_stag_type type, enum fw_ri_mem_perms perm, int bind_enabled, u32 zbva, u64 to, u64 len, u8 page_size, u32 pbl_size, u32 pbl_addr, - struct sk_buff *skb) + struct sk_buff *skb, struct c4iw_wr_wait *wr_waitp) { int err; struct fw_ri_tpte tpt; @@ -311,7 +323,7 @@ static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry, } err = write_adapter_mem(rdev, stag_idx + (rdev->lldi.vr->stag.start >> 5), - sizeof(tpt), &tpt, skb); + sizeof(tpt), &tpt, skb, wr_waitp); if (reset_tpt_entry) { c4iw_put_resource(&rdev->resource.tpt_table, stag_idx); @@ -323,7 +335,7 @@ static int write_tpt_entry(struct c4iw_rdev *rdev, u32 reset_tpt_entry, } static int write_pbl(struct c4iw_rdev *rdev, __be64 *pbl, - u32 pbl_addr, u32 pbl_size) + u32 pbl_addr, u32 pbl_size, struct c4iw_wr_wait *wr_waitp) { int err; @@ -331,37 +343,42 @@ static int write_pbl(struct c4iw_rdev *rdev, __be64 *pbl, pbl_addr, rdev->lldi.vr->pbl.start, pbl_size); - err = write_adapter_mem(rdev, pbl_addr >> 5, pbl_size << 3, pbl, NULL); + err = write_adapter_mem(rdev, pbl_addr >> 5, pbl_size << 3, pbl, NULL, + wr_waitp); return err; } static int dereg_mem(struct c4iw_rdev *rdev, u32 stag, u32 pbl_size, - u32 pbl_addr, struct sk_buff *skb) + u32 pbl_addr, struct sk_buff *skb, + struct c4iw_wr_wait *wr_waitp) { return write_tpt_entry(rdev, 1, &stag, 0, 0, 0, 0, 0, 0, 0UL, 0, 0, - pbl_size, pbl_addr, skb); + pbl_size, pbl_addr, skb, wr_waitp); } -static int allocate_window(struct c4iw_rdev *rdev, u32 * stag, u32 pdid) +static int allocate_window(struct c4iw_rdev *rdev, u32 *stag, u32 pdid, + struct c4iw_wr_wait *wr_waitp) { *stag = T4_STAG_UNSET; return write_tpt_entry(rdev, 0, stag, 0, pdid, FW_RI_STAG_MW, 0, 0, 0, - 0UL, 0, 0, 0, 0, NULL); + 0UL, 0, 0, 0, 0, NULL, wr_waitp); } static int deallocate_window(struct c4iw_rdev *rdev, u32 stag, - struct sk_buff *skb) + struct sk_buff *skb, + struct c4iw_wr_wait *wr_waitp) { return write_tpt_entry(rdev, 1, &stag, 0, 0, 0, 0, 0, 0, 0UL, 0, 0, 0, - 0, skb); + 0, skb, wr_waitp); } static int allocate_stag(struct c4iw_rdev *rdev, u32 *stag, u32 pdid, - u32 pbl_size, u32 pbl_addr) + u32 pbl_size, u32 pbl_addr, + struct c4iw_wr_wait *wr_waitp) { *stag = T4_STAG_UNSET; return write_tpt_entry(rdev, 0, stag, 0, pdid, FW_RI_STAG_NSMR, 0, 0, 0, - 0UL, 0, 0, pbl_size, pbl_addr, NULL); + 0UL, 0, 0, pbl_size, pbl_addr, NULL, wr_waitp); } static int finish_mem_reg(struct c4iw_mr *mhp, u32 stag) @@ -388,14 +405,15 @@ static int register_mem(struct c4iw_dev *rhp, struct c4iw_pd *php, mhp->attr.mw_bind_enable, mhp->attr.zbva, mhp->attr.va_fbo, mhp->attr.len ? mhp->attr.len : -1, shift - 12, - mhp->attr.pbl_size, mhp->attr.pbl_addr, NULL); + mhp->attr.pbl_size, mhp->attr.pbl_addr, NULL, + mhp->wr_waitp); if (ret) return ret; ret = finish_mem_reg(mhp, stag); if (ret) { dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size, - mhp->attr.pbl_addr, mhp->dereg_skb); + mhp->attr.pbl_addr, mhp->dereg_skb, mhp->wr_waitp); mhp->dereg_skb = NULL; } return ret; @@ -429,11 +447,17 @@ struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc) mhp = kzalloc(sizeof(*mhp), GFP_KERNEL); if (!mhp) return ERR_PTR(-ENOMEM); + mhp->wr_waitp = kzalloc(sizeof(*mhp->wr_waitp), GFP_KERNEL); + if (!mhp->wr_waitp) { + ret = -ENOMEM; + goto err_free_mhp; + } + c4iw_init_wr_wait(mhp->wr_waitp); mhp->dereg_skb = alloc_skb(SGE_MAX_WR_LEN, GFP_KERNEL); if (!mhp->dereg_skb) { ret = -ENOMEM; - goto err0; + goto err_free_wr_wait; } mhp->rhp = rhp; @@ -449,20 +473,22 @@ struct ib_mr *c4iw_get_dma_mr(struct ib_pd *pd, int acc) ret = write_tpt_entry(&rhp->rdev, 0, &stag, 1, php->pdid, FW_RI_STAG_NSMR, mhp->attr.perms, mhp->attr.mw_bind_enable, 0, 0, ~0ULL, 0, 0, 0, - NULL); + NULL, mhp->wr_waitp); if (ret) - goto err1; + goto err_free_skb; ret = finish_mem_reg(mhp, stag); if (ret) - goto err2; + goto err_dereg_mem; return &mhp->ibmr; -err2: +err_dereg_mem: dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size, - mhp->attr.pbl_addr, mhp->dereg_skb); -err1: + mhp->attr.pbl_addr, mhp->dereg_skb, mhp->wr_waitp); +err_free_wr_wait: + kfree(mhp->wr_waitp); +err_free_skb: kfree_skb(mhp->dereg_skb); -err0: +err_free_mhp: kfree(mhp); return ERR_PTR(ret); } @@ -473,7 +499,7 @@ struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, __be64 *pages; int shift, n, len; int i, k, entry; - int err = 0; + int err = -ENOMEM; struct scatterlist *sg; struct c4iw_dev *rhp; struct c4iw_pd *php; @@ -496,34 +522,31 @@ struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, mhp = kzalloc(sizeof(*mhp), GFP_KERNEL); if (!mhp) return ERR_PTR(-ENOMEM); + mhp->wr_waitp = kzalloc(sizeof(*mhp->wr_waitp), GFP_KERNEL); + if (!mhp->wr_waitp) + goto err_free_mhp; mhp->dereg_skb = alloc_skb(SGE_MAX_WR_LEN, GFP_KERNEL); - if (!mhp->dereg_skb) { - kfree(mhp); - return ERR_PTR(-ENOMEM); - } + if (!mhp->dereg_skb) + goto err_free_wr_wait; mhp->rhp = rhp; mhp->umem = ib_umem_get(pd->uobject->context, start, length, acc, 0); - if (IS_ERR(mhp->umem)) { - err = PTR_ERR(mhp->umem); - kfree_skb(mhp->dereg_skb); - kfree(mhp); - return ERR_PTR(err); - } + if (IS_ERR(mhp->umem)) + goto err_free_skb; shift = mhp->umem->page_shift; n = mhp->umem->nmap; err = alloc_pbl(mhp, n); if (err) - goto err; + goto err_umem_release; pages = (__be64 *) __get_free_page(GFP_KERNEL); if (!pages) { err = -ENOMEM; - goto err_pbl; + goto err_pbl_free; } i = n = 0; @@ -536,7 +559,8 @@ struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, if (i == PAGE_SIZE / sizeof *pages) { err = write_pbl(&mhp->rhp->rdev, pages, - mhp->attr.pbl_addr + (n << 3), i); + mhp->attr.pbl_addr + (n << 3), i, + mhp->wr_waitp); if (err) goto pbl_done; n += i; @@ -547,12 +571,13 @@ struct ib_mr *c4iw_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, if (i) err = write_pbl(&mhp->rhp->rdev, pages, - mhp->attr.pbl_addr + (n << 3), i); + mhp->attr.pbl_addr + (n << 3), i, + mhp->wr_waitp); pbl_done: free_page((unsigned long) pages); if (err) - goto err_pbl; + goto err_pbl_free; mhp->attr.pdid = php->pdid; mhp->attr.zbva = 0; @@ -563,17 +588,20 @@ pbl_done: err = register_mem(rhp, php, mhp, shift); if (err) - goto err_pbl; + goto err_pbl_free; return &mhp->ibmr; -err_pbl: +err_pbl_free: c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr, mhp->attr.pbl_size << 3); - -err: +err_umem_release: ib_umem_release(mhp->umem); +err_free_skb: kfree_skb(mhp->dereg_skb); +err_free_wr_wait: + kfree(mhp->wr_waitp); +err_free_mhp: kfree(mhp); return ERR_PTR(err); } @@ -597,13 +625,19 @@ struct ib_mw *c4iw_alloc_mw(struct ib_pd *pd, enum ib_mw_type type, if (!mhp) return ERR_PTR(-ENOMEM); + mhp->wr_waitp = kzalloc(sizeof(*mhp->wr_waitp), GFP_KERNEL); + if (!mhp->wr_waitp) { + ret = -ENOMEM; + goto free_mhp; + } + mhp->dereg_skb = alloc_skb(SGE_MAX_WR_LEN, GFP_KERNEL); if (!mhp->dereg_skb) { ret = -ENOMEM; - goto free_mhp; + goto free_wr_wait; } - ret = allocate_window(&rhp->rdev, &stag, php->pdid); + ret = allocate_window(&rhp->rdev, &stag, php->pdid, mhp->wr_waitp); if (ret) goto free_skb; mhp->rhp = rhp; @@ -620,9 +654,12 @@ struct ib_mw *c4iw_alloc_mw(struct ib_pd *pd, enum ib_mw_type type, return &(mhp->ibmw); dealloc_win: - deallocate_window(&rhp->rdev, mhp->attr.stag, mhp->dereg_skb); + deallocate_window(&rhp->rdev, mhp->attr.stag, mhp->dereg_skb, + mhp->wr_waitp); free_skb: kfree_skb(mhp->dereg_skb); +free_wr_wait: + kfree(mhp->wr_waitp); free_mhp: kfree(mhp); return ERR_PTR(ret); @@ -638,8 +675,10 @@ int c4iw_dealloc_mw(struct ib_mw *mw) rhp = mhp->rhp; mmid = (mw->rkey) >> 8; remove_handle(rhp, &rhp->mmidr, mmid); - deallocate_window(&rhp->rdev, mhp->attr.stag, mhp->dereg_skb); + deallocate_window(&rhp->rdev, mhp->attr.stag, mhp->dereg_skb, + mhp->wr_waitp); kfree_skb(mhp->dereg_skb); + kfree(mhp->wr_waitp); kfree(mhp); pr_debug("ib_mw %p mmid 0x%x ptr %p\n", mw, mmid, mhp); return 0; @@ -671,23 +710,31 @@ struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd, goto err; } + mhp->wr_waitp = kzalloc(sizeof(*mhp->wr_waitp), GFP_KERNEL); + if (!mhp->wr_waitp) { + ret = -ENOMEM; + goto err_free_mhp; + } + c4iw_init_wr_wait(mhp->wr_waitp); + mhp->mpl = dma_alloc_coherent(&rhp->rdev.lldi.pdev->dev, length, &mhp->mpl_addr, GFP_KERNEL); if (!mhp->mpl) { ret = -ENOMEM; - goto err_mpl; + goto err_free_wr_wait; } mhp->max_mpl_len = length; mhp->rhp = rhp; ret = alloc_pbl(mhp, max_num_sg); if (ret) - goto err1; + goto err_free_dma; mhp->attr.pbl_size = max_num_sg; ret = allocate_stag(&rhp->rdev, &stag, php->pdid, - mhp->attr.pbl_size, mhp->attr.pbl_addr); + mhp->attr.pbl_size, mhp->attr.pbl_addr, + mhp->wr_waitp); if (ret) - goto err2; + goto err_free_pbl; mhp->attr.pdid = php->pdid; mhp->attr.type = FW_RI_STAG_NSMR; mhp->attr.stag = stag; @@ -696,21 +743,23 @@ struct ib_mr *c4iw_alloc_mr(struct ib_pd *pd, mhp->ibmr.rkey = mhp->ibmr.lkey = stag; if (insert_handle(rhp, &rhp->mmidr, mhp, mmid)) { ret = -ENOMEM; - goto err3; + goto err_dereg; } pr_debug("mmid 0x%x mhp %p stag 0x%x\n", mmid, mhp, stag); return &(mhp->ibmr); -err3: +err_dereg: dereg_mem(&rhp->rdev, stag, mhp->attr.pbl_size, - mhp->attr.pbl_addr, mhp->dereg_skb); -err2: + mhp->attr.pbl_addr, mhp->dereg_skb, mhp->wr_waitp); +err_free_pbl: c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr, mhp->attr.pbl_size << 3); -err1: +err_free_dma: dma_free_coherent(&mhp->rhp->rdev.lldi.pdev->dev, mhp->max_mpl_len, mhp->mpl, mhp->mpl_addr); -err_mpl: +err_free_wr_wait: + kfree(mhp->wr_waitp); +err_free_mhp: kfree(mhp); err: return ERR_PTR(ret); @@ -754,7 +803,7 @@ int c4iw_dereg_mr(struct ib_mr *ib_mr) dma_free_coherent(&mhp->rhp->rdev.lldi.pdev->dev, mhp->max_mpl_len, mhp->mpl, mhp->mpl_addr); dereg_mem(&rhp->rdev, mhp->attr.stag, mhp->attr.pbl_size, - mhp->attr.pbl_addr, mhp->dereg_skb); + mhp->attr.pbl_addr, mhp->dereg_skb, mhp->wr_waitp); if (mhp->attr.pbl_size) c4iw_pblpool_free(&mhp->rhp->rdev, mhp->attr.pbl_addr, mhp->attr.pbl_size << 3); @@ -763,6 +812,7 @@ int c4iw_dereg_mr(struct ib_mr *ib_mr) if (mhp->umem) ib_umem_release(mhp->umem); pr_debug("mmid 0x%x ptr %p\n", mmid, mhp); + kfree(mhp->wr_waitp); kfree(mhp); return 0; } -- 2.30.2