From nobody Mon Feb 9 16:19:31 2026 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org ARC-Seal: i=1; a=rsa-sha256; t=1588657939; cv=none; d=zohomail.com; s=zohoarc; b=AhXc9/nQ0HXsSMKQPVTrwiY/9CZXHvcCWKkYO9/WX/5mVuoHbWSpKj1unmKy+HyEJQSVihXnyaIPzq6MS3dt/5mHlzyjvhNpZKEcOxrTbZWPeKQDrtFJfSL3KLpZ0g3pAdqyQZZWM6bXrY1UV6BSYHFWMEqFfJ0GRkZ0lmTlY+s= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1588657939; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; bh=WFhVXYnHroxWvDmAFmA+JCgFrxJwuSE5d5Q+bGRdNeg=; b=G3wOlstkk6F1xdWEFBOQVwrZ+2eL307U1RGLaNeeaMbxX5jyQC4MdD117axPohKSBEI45lMkPvK4Gm2s4mZamjXVt5c4UjWCf0T7V1n1fWJCibHXL3PXvP6cgB76BBUIK8LFOvdIpPExhzo8OtkJKqS52vJkMlKUZo5uhx+jE/I= ARC-Authentication-Results: i=1; mx.zohomail.com; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1588657939115615.6586554568627; Mon, 4 May 2020 22:52:19 -0700 (PDT) Received: from localhost ([::1]:38928 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jVqV7-0004I5-Rw for importer@patchew.org; Tue, 05 May 2020 01:52:17 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:53590) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jVqSA-0007Bz-N7; Tue, 05 May 2020 01:49:14 -0400 Received: from charlie.dont.surf ([128.199.63.193]:56350) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1jVqS7-0005GH-Ac; Tue, 05 May 2020 01:49:14 -0400 Received: from apples.local (80-167-98-190-cable.dk.customer.tdc.net [80.167.98.190]) by charlie.dont.surf (Postfix) with ESMTPSA id 9C275BFBB9; Tue, 5 May 2020 05:49:06 +0000 (UTC) From: Klaus Jensen To: qemu-block@nongnu.org Subject: [PATCH v5 07/18] nvme: add max_ioqpairs device parameter Date: Tue, 5 May 2020 07:48:29 +0200 Message-Id: <20200505054840.186586-8-its@irrelevant.dk> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200505054840.186586-1-its@irrelevant.dk> References: <20200505054840.186586-1-its@irrelevant.dk> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=128.199.63.193; envelope-from=its@irrelevant.dk; helo=charlie.dont.surf X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/05 00:31:35 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kevin Wolf , Beata Michalska , Klaus Jensen , qemu-devel@nongnu.org, Max Reitz , Klaus Jensen , Keith Busch , Javier Gonzalez , Maxim Levitsky , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" From: Klaus Jensen The num_queues device paramater has a slightly confusing meaning because it accounts for the admin queue pair which is not really optional. Secondly, it is really a maximum value of queues allowed. Add a new max_ioqpairs parameter that only accounts for I/O queue pairs, but keep num_queues for compatibility. Signed-off-by: Klaus Jensen Reviewed-by: Maxim Levitsky Reviewed-by: Philippe Mathieu-Daud=C3=A9 Reviewed-by: Keith Busch --- hw/block/nvme.c | 51 ++++++++++++++++++++++++++++++------------------- hw/block/nvme.h | 3 ++- 2 files changed, 33 insertions(+), 21 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index 623a88be93dc..3875a5f3dcbf 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -20,7 +20,7 @@ * -device nvme,drive=3D,serial=3D,id=3D, \ * cmb_size_mb=3D, \ * [pmrdev=3D,] \ - * num_queues=3D + * max_ioqpairs=3D * * Note cmb_size_mb denotes size of CMB in MB. CMB is assumed to be at * offset 0 in BAR2 and supports only WDS, RDS and SQS for now. @@ -36,6 +36,7 @@ =20 #include "qemu/osdep.h" #include "qemu/units.h" +#include "qemu/error-report.h" #include "hw/block/block.h" #include "hw/pci/msix.h" #include "hw/pci/pci.h" @@ -86,12 +87,12 @@ static void nvme_addr_read(NvmeCtrl *n, hwaddr addr, vo= id *buf, int size) =20 static int nvme_check_sqid(NvmeCtrl *n, uint16_t sqid) { - return sqid < n->params.num_queues && n->sq[sqid] !=3D NULL ? 0 : -1; + return sqid < n->params.max_ioqpairs + 1 && n->sq[sqid] !=3D NULL ? 0 = : -1; } =20 static int nvme_check_cqid(NvmeCtrl *n, uint16_t cqid) { - return cqid < n->params.num_queues && n->cq[cqid] !=3D NULL ? 0 : -1; + return cqid < n->params.max_ioqpairs + 1 && n->cq[cqid] !=3D NULL ? 0 = : -1; } =20 static void nvme_inc_cq_tail(NvmeCQueue *cq) @@ -653,7 +654,7 @@ static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cm= d) trace_pci_nvme_err_invalid_create_cq_addr(prp1); return NVME_INVALID_FIELD | NVME_DNR; } - if (unlikely(vector > n->params.num_queues)) { + if (unlikely(vector > n->params.max_ioqpairs + 1)) { trace_pci_nvme_err_invalid_create_cq_vector(vector); return NVME_INVALID_IRQ_VECTOR | NVME_DNR; } @@ -805,8 +806,8 @@ static uint16_t nvme_get_feature(NvmeCtrl *n, NvmeCmd *= cmd, NvmeRequest *req) trace_pci_nvme_getfeat_vwcache(result ? "enabled" : "disabled"); break; case NVME_NUMBER_OF_QUEUES: - result =3D cpu_to_le32((n->params.num_queues - 2) | - ((n->params.num_queues - 2) << 16)); + result =3D cpu_to_le32((n->params.max_ioqpairs - 1) | + ((n->params.max_ioqpairs - 1) << 16)); trace_pci_nvme_getfeat_numq(result); break; case NVME_TIMESTAMP: @@ -850,10 +851,10 @@ static uint16_t nvme_set_feature(NvmeCtrl *n, NvmeCmd= *cmd, NvmeRequest *req) case NVME_NUMBER_OF_QUEUES: trace_pci_nvme_setfeat_numq((dw11 & 0xFFFF) + 1, ((dw11 >> 16) & 0xFFFF) + 1, - n->params.num_queues - 1, - n->params.num_queues - 1); - req->cqe.result =3D cpu_to_le32((n->params.num_queues - 2) | - ((n->params.num_queues - 2) << 16)); + n->params.max_ioqpairs, + n->params.max_ioqpairs); + req->cqe.result =3D cpu_to_le32((n->params.max_ioqpairs - 1) | + ((n->params.max_ioqpairs - 1) << 16)= ); break; case NVME_TIMESTAMP: return nvme_set_feature_timestamp(n, cmd); @@ -924,12 +925,12 @@ static void nvme_clear_ctrl(NvmeCtrl *n) =20 blk_drain(n->conf.blk); =20 - for (i =3D 0; i < n->params.num_queues; i++) { + for (i =3D 0; i < n->params.max_ioqpairs + 1; i++) { if (n->sq[i] !=3D NULL) { nvme_free_sq(n->sq[i], n); } } - for (i =3D 0; i < n->params.num_queues; i++) { + for (i =3D 0; i < n->params.max_ioqpairs + 1; i++) { if (n->cq[i] !=3D NULL) { nvme_free_cq(n->cq[i], n); } @@ -1360,8 +1361,17 @@ static void nvme_realize(PCIDevice *pci_dev, Error *= *errp) int64_t bs_size; uint8_t *pci_conf; =20 - if (!n->params.num_queues) { - error_setg(errp, "num_queues can't be zero"); + if (n->params.num_queues) { + warn_report("num_queues is deprecated; please use max_ioqpairs " + "instead"); + + n->params.max_ioqpairs =3D n->params.num_queues - 1; + } + + if (n->params.max_ioqpairs < 1 || + n->params.max_ioqpairs > PCI_MSIX_FLAGS_QSIZE) { + error_setg(errp, "max_ioqpairs must be between 1 and %d", + PCI_MSIX_FLAGS_QSIZE); return; } =20 @@ -1411,21 +1421,21 @@ static void nvme_realize(PCIDevice *pci_dev, Error = **errp) =20 n->num_namespaces =3D 1; =20 - /* num_queues is really number of pairs, so each has two doorbells */ + /* add one to max_ioqpairs to account for the admin queue pair */ n->reg_size =3D pow2ceil(NVME_REG_SIZE + - 2 * n->params.num_queues * NVME_DB_SIZE); + 2 * (n->params.max_ioqpairs + 1) * NVME_DB_SIZE= ); n->ns_size =3D bs_size / (uint64_t)n->num_namespaces; =20 n->namespaces =3D g_new0(NvmeNamespace, n->num_namespaces); - n->sq =3D g_new0(NvmeSQueue *, n->params.num_queues); - n->cq =3D g_new0(NvmeCQueue *, n->params.num_queues); + n->sq =3D g_new0(NvmeSQueue *, n->params.max_ioqpairs + 1); + n->cq =3D g_new0(NvmeCQueue *, n->params.max_ioqpairs + 1); =20 memory_region_init_io(&n->iomem, OBJECT(n), &nvme_mmio_ops, n, "nvme", n->reg_size); pci_register_bar(pci_dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64, &n->iomem); - msix_init_exclusive_bar(pci_dev, n->params.num_queues, 4, NULL); + msix_init_exclusive_bar(pci_dev, n->params.max_ioqpairs + 1, 4, NULL); =20 id->vid =3D cpu_to_le16(pci_get_word(pci_conf + PCI_VENDOR_ID)); id->ssvid =3D cpu_to_le16(pci_get_word(pci_conf + PCI_SUBSYSTEM_VENDOR= _ID)); @@ -1571,7 +1581,8 @@ static Property nvme_props[] =3D { HostMemoryBackend *), DEFINE_PROP_STRING("serial", NvmeCtrl, params.serial), DEFINE_PROP_UINT32("cmb_size_mb", NvmeCtrl, params.cmb_size_mb, 0), - DEFINE_PROP_UINT32("num_queues", NvmeCtrl, params.num_queues, 64), + DEFINE_PROP_UINT32("num_queues", NvmeCtrl, params.num_queues, 0), + DEFINE_PROP_UINT32("max_ioqpairs", NvmeCtrl, params.max_ioqpairs, 64), DEFINE_PROP_END_OF_LIST(), }; =20 diff --git a/hw/block/nvme.h b/hw/block/nvme.h index 9df244c93c02..c4e3edfebe0b 100644 --- a/hw/block/nvme.h +++ b/hw/block/nvme.h @@ -5,7 +5,8 @@ =20 typedef struct NvmeParams { char *serial; - uint32_t num_queues; + uint32_t num_queues; /* deprecated since 5.1 */ + uint32_t max_ioqpairs; uint32_t cmb_size_mb; } NvmeParams; =20 --=20 2.26.2