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 715E0C76196 for ; Mon, 10 Apr 2023 11:12:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229827AbjDJLMe (ORCPT ); Mon, 10 Apr 2023 07:12:34 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229802AbjDJLMd (ORCPT ); Mon, 10 Apr 2023 07:12:33 -0400 Received: from mail-pl1-x62d.google.com (mail-pl1-x62d.google.com [IPv6:2607:f8b0:4864:20::62d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 22E5E271B for ; Mon, 10 Apr 2023 04:12:13 -0700 (PDT) Received: by mail-pl1-x62d.google.com with SMTP id ke16so4321810plb.6 for ; Mon, 10 Apr 2023 04:12:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1681125132; x=1683717132; h=references:in-reply-to:message-id:date:subject:cc:to:from:from:to :cc:subject:date:message-id:reply-to; bh=X8HDt9pilLfZFdgFlWR7TnW5MIKXzx+Vs8Epja89hO4=; b=VPEIcr47Y0xN09AtRS4mDhtNmMCGcW/aou2Xn6fmVrmyAWWWQVVYHcdyXR7/eCFsEs jX274ve8+41cqqdnmiJUuPB7QX3thoEGYcaNqhFrsGD7oSkgSI3pVZC9yIZ9cXLZcLv0 Jonq6mnfk8bmZL4rFmev7fpoL7nXVYzn0cK4U= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1681125132; x=1683717132; 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=X8HDt9pilLfZFdgFlWR7TnW5MIKXzx+Vs8Epja89hO4=; b=PhKgeA8lvM2KU8m63Kw3Vf1wNFAu5pogtu92EjLFflf8N0F0Ejdw/LWwfCABxrGal/ aHLQsuaI+wuPzVOVbSgyHnxkpPKlych4XFACaCbm0j6xHPF65FG3lV1+CmLV8EO87nK/ 4tYNrZQfQ79fttEOSjqyRm4DrfwhjSvPSTDJZOe+8jhysM8L38TYQmza1i92SkfK2dbo KM884KSl6a5uL4KAsnXNfZYzWc8bnqHIgelmI7kDrn9NA3nUGzJHMzL6dwdcnlrxQk5u BYRB7ftgVuz+2Zy4BgC/ER9AiAf0p2CqhedpLnnH7mfP5zzNFAJdRZE+UdyRLHlENfXI w0ZQ== X-Gm-Message-State: AAQBX9cYaj6Wd8CbrLMGThUBOgxYJBpPnV/Cu5fBR3OzAj2U402rMOp5 iSmAaCF5Rx/0ZaDC8J0m7xm+/g== X-Google-Smtp-Source: AKy350YsbPdxpfD8NDDH147d752UK+bTWaT0uQ/AgPvFkbTRInd/NkznPwf1RXS7++IKcFzXgHKNiw== X-Received: by 2002:a05:6a20:b2a6:b0:db:391a:5eff with SMTP id ei38-20020a056a20b2a600b000db391a5effmr11312704pzb.22.1681125132027; Mon, 10 Apr 2023 04:12:12 -0700 (PDT) Received: from dhcp-10-192-206-197.iig.avagotech.net.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id y10-20020aa7854a000000b005ded4825201sm7641875pfn.112.2023.04.10.04.12.08 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 10 Apr 2023 04:12:10 -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 for-next 1/6] RDMA/bnxt_re: Use the common mmap helper functions Date: Mon, 10 Apr 2023 04:11:50 -0700 Message-Id: <1681125115-7127-2-git-send-email-selvin.xavier@broadcom.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: <1681125115-7127-1-git-send-email-selvin.xavier@broadcom.com> References: <1681125115-7127-1-git-send-email-selvin.xavier@broadcom.com> Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000057eb2105f8f97276" Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org --00000000000057eb2105f8f97276 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 --- drivers/infiniband/hw/bnxt_re/ib_verbs.c | 110 ++++++++++++++++++++++++++---- 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, 115 insertions(+), 23 deletions(-) diff --git a/drivers/infiniband/hw/bnxt_re/ib_verbs.c b/drivers/infiniband/hw/bnxt_re/ib_verbs.c index e86afec..c9d134c 100644 --- a/drivers/infiniband/hw/bnxt_re/ib_verbs.c +++ b/drivers/infiniband/hw/bnxt_re/ib_verbs.c @@ -533,12 +533,42 @@ static int bnxt_re_create_fence_mr(struct bnxt_re_pd *pd) return rc; } +static struct rdma_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 = kzalloc(sizeof(*entry), GFP_KERNEL); + int ret; + + 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->rdma_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 +587,7 @@ 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; + int rc = 0; pd->rdev = rdev; if (bnxt_qplib_alloc_pd(&rdev->qplib_res.pd_tbl, &pd->qplib_pd)) { @@ -567,7 +597,7 @@ 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 +614,23 @@ 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)); + pd->pd_db_mmap = bnxt_re_mmap_entry_insert(ucntx, (u64)ucntx->dpi.umdbr, + BNXT_RE_MMAP_UC_DB, &resp.dbr); + + if (!pd->pd_db_mmap) { + ibdev_err(&rdev->ibdev, + "Failed to insert mmap entry\n"); + rc = -ENOMEM; + goto dbfail; + } + + 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; } } @@ -3994,6 +4035,13 @@ 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; + uctx->shpage_mmap = bnxt_re_mmap_entry_insert(uctx, 0, BNXT_RE_MMAP_SH_PAGE, NULL); + if (!uctx->shpage_mmap) { + ibdev_err(ibdev, "Failed to create mmap entry for shared page\n"); + rc = -ENOMEM; + goto cfail; + } + rc = ib_copy_to_udata(udata, &resp, min(udata->outlen, sizeof(resp))); if (rc) { ibdev_err(ibdev, "Failed to copy user context"); @@ -4017,6 +4065,8 @@ 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 +4086,57 @@ 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_user_mmap_entry *bnxt_entry; + struct rdma_user_mmap_entry *rdma_entry; struct bnxt_re_dev *rdev = uctx->rdev; + 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) { + ibdev_err(&rdev->ibdev, + "%s: No valid rdma_entry pgoffset = 0x%lx\n", + __func__, vma->vm_pgoff); 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 { + 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); + if (ret) + ibdev_err(&rdev->ibdev, "Failed to map shared page"); + break; + case BNXT_RE_MMAP_SH_PAGE: 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; + ret = -EAGAIN; } + break; + default: + ibdev_err(&rdev->ibdev, + "%s: invalid mmap flag = 0x%x\n", __func__, bnxt_entry->mmap_flag); + 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 --00000000000057eb2105f8f97276 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 VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS MyBQZXJzb25hbFNpZ24gMiBDQSAyMDIwMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA vbCmXCcsbZ/a0fRIQMBxp4gJnnyeneFYpEtNydrZZ+GeKSMdHiDgXD1UnRSIudKo+moQ6YlCOu4t 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