From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A8601C77B61 for ; Tue, 25 Apr 2023 19:30:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235130AbjDYTaQ (ORCPT ); Tue, 25 Apr 2023 15:30:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50466 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235476AbjDYTaP (ORCPT ); Tue, 25 Apr 2023 15:30:15 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D9AE4A8 for ; Tue, 25 Apr 2023 12:30:13 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id d9443c01a7336-1a50cb65c92so49863825ad.0 for ; Tue, 25 Apr 2023 12:30:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1682451013; x=1685043013; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=MIOSba0dh/vA3e4O80T4yoeKqc4cE3dHusiPqmMcrgg=; b=bGoosNQhBxjYHHFBBvs/jjxERK5rh/ZD1tginZrY37/dw+OayYCnPtIrgR6zPJ2AW/ 4uLNtPdKClQ3dhXyBdRpcN6sg6Lp2AZKE4uxW0+B92010vMBOT1U0mX+5LDXMkgsDCAk J2VC8h3Y2yIMTsKwhiO8voiPeV04HEVp943JQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1682451013; x=1685043013; h=references:in-reply-to:message-id:date:subject:cc:to:from :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=MIOSba0dh/vA3e4O80T4yoeKqc4cE3dHusiPqmMcrgg=; b=W0tAR5o1wwT2VpYKKwAA1V/E7pqTYrUzNoudzn+TKLbbok5/g5nPRupatI1D715Cwi K9tqkqe5IUQzGjaOSJbiLWHjID76nvU0fzt6meO5dK1dERwlT/dtLI3wcmNdF8Q1o1f5 QHjxZLQPIRoU+uc+f4JSDFMTde5fpmQHCSKsDyW73NICUAGrKR1aJadtGAloYXyRVMAv v7pq1G8OAAzoVIv91jbXul0aGaxIj/ISET4MXy/FOqLxD8ShrZOn9SkWdnLqPNXqc3sQ kDDExdAksyZJ8UOhWphibiORZHINv8lulln9SVVixmXFKGtxge2YBH5wkt2QZYYXF0WL ETzA== X-Gm-Message-State: AAQBX9cS4sf4L5hBBfad/cYXeKTvVmtdiB+WZ0YPsShvyzIozXTIJc/a vooMenyxc1WVJkI/aXJJ7bWCgA== X-Google-Smtp-Source: AKy350awy5Mhhk8mhlsv/WGanQ3umuyo2R7rMM5MrguU80uyGUrXdq19vcXvtF0cv7hKJGsz/0uybw== X-Received: by 2002:a17:902:ce81:b0:1a6:983d:a1ec with SMTP id f1-20020a170902ce8100b001a6983da1ecmr23694704plg.26.1682451013158; Tue, 25 Apr 2023 12:30:13 -0700 (PDT) Received: from dhcp-10-192-206-197.iig.avagotech.net.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id w3-20020a170902c78300b001a64ed4621csm8618217pla.182.2023.04.25.12.30.10 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Tue, 25 Apr 2023 12:30:12 -0700 (PDT) From: Selvin Xavier To: jgg@ziepe.ca, leon@kernel.org Cc: linux-rdma@vger.kernel.org, andrew.gospodarek@broadcom.com, Selvin Xavier Subject: [PATCH v2 for-next 1/6] RDMA/bnxt_re: Use the common mmap helper functions Date: Tue, 25 Apr 2023 12:29:48 -0700 Message-Id: <1682450993-17711-2-git-send-email-selvin.xavier@broadcom.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1682450993-17711-1-git-send-email-selvin.xavier@broadcom.com> References: <1682450993-17711-1-git-send-email-selvin.xavier@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000049d5505fa2e2729" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org --000000000000049d5505fa2e2729 Replace the mmap handling function with common code in IB core. Create rdma_user_mmap_entry for each mmap resource and add to the ib_core mmap list. Add mmap_free verb support. Also, use rdma_user_mmap_io while mapping Doorbell pages. Signed-off-by: Selvin Xavier --- v1 -> v2: - Remove the usage of remap_pfn_range during the mmap of a kernel page. Use vm_insert_page for the kernel page. - Split the definition and allocation of bnxt_re_user_mmap_entry drivers/infiniband/hw/bnxt_re/ib_verbs.c | 113 ++++++++++++++++++++++++------ drivers/infiniband/hw/bnxt_re/ib_verbs.h | 15 ++++ drivers/infiniband/hw/bnxt_re/main.c | 1 + drivers/infiniband/hw/bnxt_re/qplib_fp.c | 10 +-- drivers/infiniband/hw/bnxt_re/qplib_res.c | 2 +- 5 files changed, 110 insertions(+), 31 deletions(-) diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c index e86afec..2434174 100644 --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c @@ -533,12 +533,43 @@ static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd) return rc; } +static struct bnxt_re_user_mmap_entry* +bnxt_re_mmap_entry_insert(struct bnxt_re_ucontext *uctx, u64 mem_offset, + enum bnxt_re_mmap_flag mmap_flag, u64 *offset) +{ + struct bnxt_re_user_mmap_entry *entry; + int ret; + + entry = kzalloc(sizeof(*entry), GFP_KERNEL); + if (!entry) + return NULL; + + entry->mem_offset = mem_offset; + entry->mmap_flag = mmap_flag; + + ret = rdma_user_mmap_entry_insert(&uctx->ib_uctx, + &entry->rdma_entry, PAGE_SIZE); + if (ret) { + kfree(entry); + return NULL; + } + if (offset) + *offset = rdma_user_mmap_get_offset(&entry->rdma_entry); + + return entry; +} + /* Protection Domains */ int bnxt_re_dealloc_pd(struct ib_pd *ib_pd, struct ib_udata *udata) { struct bnxt_re_pd *pd = container_of(ib_pd, struct bnxt_re_pd, ib_pd); struct bnxt_re_dev *rdev = pd->rdev; + if (udata) { + rdma_user_mmap_entry_remove(pd->pd_db_mmap); + pd->pd_db_mmap = NULL; + } + bnxt_re_destroy_fence_mr(pd); if (pd->qplib_pd.id) { @@ -557,7 +588,8 @@ int bnxt_re_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) struct bnxt_re_ucontext *ucntx = rdma_udata_to_drv_context( udata, struct bnxt_re_ucontext, ib_uctx); struct bnxt_re_pd *pd = container_of(ibpd, struct bnxt_re_pd, ib_pd); - int rc; + struct bnxt_re_user_mmap_entry *entry = NULL; + int rc = 0; pd->rdev = rdev; if (bnxt_qplib_alloc_pd(&rdev->qplib_res.pd_tbl, &pd->qplib_pd)) { @@ -567,7 +599,7 @@ int bnxt_re_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) } if (udata) { - struct bnxt_re_pd_resp resp; + struct bnxt_re_pd_resp resp = {}; if (!ucntx->dpi.dbr) { /* Allocate DPI in alloc_pd to avoid failing of @@ -584,12 +616,21 @@ int bnxt_re_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) resp.pdid = pd->qplib_pd.id; /* Still allow mapping this DBR to the new user PD. */ resp.dpi = ucntx->dpi.dpi; - resp.dbr = (u64)ucntx->dpi.umdbr; - rc = ib_copy_to_udata(udata, &resp, sizeof(resp)); + entry = bnxt_re_mmap_entry_insert(ucntx, (u64)ucntx->dpi.umdbr, + BNXT_RE_MMAP_UC_DB, &resp.dbr); + + if (!entry) { + rc = -ENOMEM; + goto dbfail; + } + + pd->pd_db_mmap = &entry->rdma_entry; + + rc = ib_copy_to_udata(udata, &resp, min(sizeof(resp), udata->outlen)); if (rc) { - ibdev_err(&rdev->ibdev, - "Failed to copy user response\n"); + rdma_user_mmap_entry_remove(pd->pd_db_mmap); + rc = -EFAULT; goto dbfail; } } @@ -3956,6 +3997,7 @@ int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata) container_of(ctx, struct bnxt_re_ucontext, ib_uctx); struct bnxt_re_dev *rdev = to_bnxt_re_dev(ibdev, ibdev); struct bnxt_qplib_dev_attr *dev_attr = &rdev->dev_attr; + struct bnxt_re_user_mmap_entry *entry; struct bnxt_re_uctx_resp resp = {}; u32 chip_met_rev_num = 0; int rc; @@ -3994,6 +4036,13 @@ int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata) resp.comp_mask |= BNXT_RE_UCNTX_CMASK_HAVE_MODE; resp.mode = rdev->chip_ctx->modes.wqe_mode; + entry = bnxt_re_mmap_entry_insert(uctx, 0, BNXT_RE_MMAP_SH_PAGE, NULL); + if (!entry) { + rc = -ENOMEM; + goto cfail; + } + uctx->shpage_mmap = &entry->rdma_entry; + rc = ib_copy_to_udata(udata, &resp, min(udata->outlen, sizeof(resp))); if (rc) { ibdev_err(ibdev, "Failed to copy user context"); @@ -4017,6 +4066,8 @@ void bnxt_re_dealloc_ucontext(struct ib_ucontext *ib_uctx) struct bnxt_re_dev *rdev = uctx->rdev; + rdma_user_mmap_entry_remove(uctx->shpage_mmap); + uctx->shpage_mmap = NULL; if (uctx->shpg) free_page((unsigned long)uctx->shpg); @@ -4036,27 +4087,43 @@ int bnxt_re_mmap(struct ib_ucontext *ib_uctx, struct vm_area_struct *vma) struct bnxt_re_ucontext *uctx = container_of(ib_uctx, struct bnxt_re_ucontext, ib_uctx); - struct bnxt_re_dev *rdev = uctx->rdev; + struct bnxt_re_user_mmap_entry *bnxt_entry; + struct rdma_user_mmap_entry *rdma_entry; + int ret = 0; u64 pfn; - if (vma->vm_end - vma->vm_start != PAGE_SIZE) + rdma_entry = rdma_user_mmap_entry_get(&uctx->ib_uctx, vma); + if (!rdma_entry) return -EINVAL; - if (vma->vm_pgoff) { - vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); - if (io_remap_pfn_range(vma, vma->vm_start, vma->vm_pgoff, - PAGE_SIZE, vma->vm_page_prot)) { - ibdev_err(&rdev->ibdev, "Failed to map DPI"); - return -EAGAIN; - } - } else { - pfn = virt_to_phys(uctx->shpg) >> PAGE_SHIFT; - if (remap_pfn_range(vma, vma->vm_start, - pfn, PAGE_SIZE, vma->vm_page_prot)) { - ibdev_err(&rdev->ibdev, "Failed to map shared page"); - return -EAGAIN; - } + bnxt_entry = container_of(rdma_entry, struct bnxt_re_user_mmap_entry, + rdma_entry); + + switch (bnxt_entry->mmap_flag) { + case BNXT_RE_MMAP_UC_DB: + pfn = bnxt_entry->mem_offset >> PAGE_SHIFT; + ret = rdma_user_mmap_io(ib_uctx, vma, pfn, PAGE_SIZE, + pgprot_noncached(vma->vm_page_prot), + rdma_entry); + break; + case BNXT_RE_MMAP_SH_PAGE: + ret = vm_insert_page(vma, vma->vm_start, virt_to_page(uctx->shpg)); + break; + default: + ret = -EINVAL; + break; } - return 0; + rdma_user_mmap_entry_put(rdma_entry); + return ret; +} + +void bnxt_re_mmap_free(struct rdma_user_mmap_entry *rdma_entry) +{ + struct bnxt_re_user_mmap_entry *bnxt_entry; + + bnxt_entry = container_of(rdma_entry, struct bnxt_re_user_mmap_entry, + rdma_entry); + + kfree(bnxt_entry); } diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.h b/drivers/infiniband/hw/bnxt_re/ib_verbs.h index 31f7e34..dcd31ae 100644 --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.h +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.h @@ -60,6 +60,7 @@ struct bnxt_re_pd { struct bnxt_re_dev *rdev; struct bnxt_qplib_pd qplib_pd; struct bnxt_re_fence_data fence; + struct rdma_user_mmap_entry *pd_db_mmap; }; struct bnxt_re_ah { @@ -136,6 +137,18 @@ struct bnxt_re_ucontext { struct bnxt_qplib_dpi dpi; void *shpg; spinlock_t sh_lock; /* protect shpg */ + struct rdma_user_mmap_entry *shpage_mmap; +}; + +enum bnxt_re_mmap_flag { + BNXT_RE_MMAP_SH_PAGE, + BNXT_RE_MMAP_UC_DB, +}; + +struct bnxt_re_user_mmap_entry { + struct rdma_user_mmap_entry rdma_entry; + u64 mem_offset; + u8 mmap_flag; }; static inline u16 bnxt_re_get_swqe_size(int nsge) @@ -213,6 +226,8 @@ struct ib_mr *bnxt_re_reg_user_mr(struct ib_pd *pd, u64 start, u64 length, int bnxt_re_alloc_ucontext(struct ib_ucontext *ctx, struct ib_udata *udata); void bnxt_re_dealloc_ucontext(struct ib_ucontext *context); int bnxt_re_mmap(struct ib_ucontext *context, struct vm_area_struct *vma); +void bnxt_re_mmap_free(struct rdma_user_mmap_entry *rdma_entry); + unsigned long bnxt_re_lock_cqs(struct bnxt_re_qp *qp); void bnxt_re_unlock_cqs(struct bnxt_re_qp *qp, unsigned long flags); diff --git a/drivers/infiniband/hw/bnxt_re/main.c b/drivers/infiniband/hw/bnxt_re/main.c index b9e2f89..1d361eb 100644 --- a/drivers/infiniband/hw/bnxt_re/main.c +++ b/drivers/infiniband/hw/bnxt_re/main.c @@ -539,6 +539,7 @@ static const struct ib_device_ops bnxt_re_dev_ops = { .get_port_immutable = bnxt_re_get_port_immutable, .map_mr_sg = bnxt_re_map_mr_sg, .mmap = bnxt_re_mmap, + .mmap_free = bnxt_re_mmap_free, .modify_qp = bnxt_re_modify_qp, .modify_srq = bnxt_re_modify_srq, .poll_cq = bnxt_re_poll_cq, diff --git a/drivers/infiniband/hw/bnxt_re/qplib_fp.c b/drivers/infiniband/hw/bnxt_re/qplib_fp.c index f139d4c..ade858f 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_fp.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_fp.c @@ -471,7 +471,6 @@ static int bnxt_qplib_map_nq_db(struct bnxt_qplib_nq *nq, u32 reg_offt) resource_size_t reg_base; struct bnxt_qplib_nq_db *nq_db; struct pci_dev *pdev; - int rc = 0; pdev = nq->pdev; nq_db = &nq->nq_db; @@ -481,8 +480,7 @@ static int bnxt_qplib_map_nq_db(struct bnxt_qplib_nq *nq, u32 reg_offt) if (!nq_db->reg.bar_base) { dev_err(&pdev->dev, "QPLIB: NQ BAR region %d resc start is 0!", nq_db->reg.bar_id); - rc = -ENOMEM; - goto fail; + return -ENOMEM; } reg_base = nq_db->reg.bar_base + reg_offt; @@ -492,15 +490,13 @@ static int bnxt_qplib_map_nq_db(struct bnxt_qplib_nq *nq, u32 reg_offt) if (!nq_db->reg.bar_reg) { dev_err(&pdev->dev, "QPLIB: NQ BAR region %d mapping failed", nq_db->reg.bar_id); - rc = -ENOMEM; - goto fail; + return -ENOMEM; } nq_db->dbinfo.db = nq_db->reg.bar_reg; nq_db->dbinfo.hwq = &nq->hwq; nq_db->dbinfo.xid = nq->ring_id; -fail: - return rc; + return 0; } int bnxt_qplib_enable_nq(struct pci_dev *pdev, struct bnxt_qplib_nq *nq, diff --git a/drivers/infiniband/hw/bnxt_re/qplib_res.c b/drivers/infiniband/hw/bnxt_re/qplib_res.c index 126d4f2..920ab87 100644 --- a/drivers/infiniband/hw/bnxt_re/qplib_res.c +++ b/drivers/infiniband/hw/bnxt_re/qplib_res.c @@ -813,7 +813,7 @@ static int bnxt_qplib_alloc_dpi_tbl(struct bnxt_qplib_res *res, return 0; unmap_io: - pci_iounmap(res->pdev, dpit->dbr_bar_reg_iomem); + iounmap(dpit->dbr_bar_reg_iomem); dpit->dbr_bar_reg_iomem = NULL; return -ENOMEM; } -- 2.5.5 --000000000000049d5505fa2e2729 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQfAYJKoZIhvcNAQcCoIIQbTCCEGkCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3TMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD 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