From patchwork Wed Apr 15 13:01:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Klaus Jensen X-Patchwork-Id: 284295 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 71E13C2BB55 for ; Wed, 15 Apr 2020 13:08:35 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 420022076D for ; Wed, 15 Apr 2020 13:08:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 420022076D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=irrelevant.dk Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:49728 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jOhmM-0007zw-BZ for qemu-devel@archiver.kernel.org; Wed, 15 Apr 2020 09:08:34 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:33728) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jOhgV-0007Fo-JL for qemu-devel@nongnu.org; Wed, 15 Apr 2020 09:02:33 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jOhgT-0004MS-TJ for qemu-devel@nongnu.org; Wed, 15 Apr 2020 09:02:31 -0400 Received: from charlie.dont.surf ([128.199.63.193]:48574) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jOhgN-000476-Rm; Wed, 15 Apr 2020 09:02:24 -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 9D0AABFD2F; Wed, 15 Apr 2020 13:02:22 +0000 (UTC) From: Klaus Jensen To: qemu-block@nongnu.org Subject: [PATCH v2 07/16] nvme: add max_ioqpairs device parameter Date: Wed, 15 Apr 2020 15:01:50 +0200 Message-Id: <20200415130159.611361-8-its@irrelevant.dk> X-Mailer: git-send-email 2.26.0 In-Reply-To: <20200415130159.611361-1-its@irrelevant.dk> References: <20200415130159.611361-1-its@irrelevant.dk> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 128.199.63.193 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_Mathieu-Daud?= =?utf-8?b?w6k=?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.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-Daudé --- hw/block/nvme.c | 48 +++++++++++++++++++++++++++++------------------- hw/block/nvme.h | 6 ++++-- 2 files changed, 33 insertions(+), 21 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index d026985f62d0..8092c1b46eb1 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -19,7 +19,7 @@ * -drive file=,if=none,id= * -device nvme,drive=,serial=,id=, \ * cmb_size_mb=, \ - * num_queues= + * max_ioqpairs= * * 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. @@ -27,6 +27,7 @@ #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" @@ -75,12 +76,12 @@ static void nvme_addr_read(NvmeCtrl *n, hwaddr addr, void *buf, int size) static int nvme_check_sqid(NvmeCtrl *n, uint16_t sqid) { - return sqid < n->params.num_queues && n->sq[sqid] != NULL ? 0 : -1; + return sqid < n->params.max_ioqpairs + 1 && n->sq[sqid] != NULL ? 0 : -1; } static int nvme_check_cqid(NvmeCtrl *n, uint16_t cqid) { - return cqid < n->params.num_queues && n->cq[cqid] != NULL ? 0 : -1; + return cqid < n->params.max_ioqpairs + 1 && n->cq[cqid] != NULL ? 0 : -1; } static void nvme_inc_cq_tail(NvmeCQueue *cq) @@ -642,7 +643,7 @@ static uint16_t nvme_create_cq(NvmeCtrl *n, NvmeCmd *cmd) 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; } @@ -794,8 +795,8 @@ 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 = cpu_to_le32((n->params.num_queues - 2) | - ((n->params.num_queues - 2) << 16)); + result = cpu_to_le32((n->params.max_ioqpairs - 1) | + ((n->params.max_ioqpairs - 1) << 16)); trace_pci_nvme_getfeat_numq(result); break; case NVME_TIMESTAMP: @@ -839,10 +840,10 @@ 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 = 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 = 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); @@ -913,12 +914,12 @@ static void nvme_clear_ctrl(NvmeCtrl *n) blk_drain(n->conf.blk); - for (i = 0; i < n->params.num_queues; i++) { + for (i = 0; i < n->params.max_ioqpairs + 1; i++) { if (n->sq[i] != NULL) { nvme_free_sq(n->sq[i], n); } } - for (i = 0; i < n->params.num_queues; i++) { + for (i = 0; i < n->params.max_ioqpairs + 1; i++) { if (n->cq[i] != NULL) { nvme_free_cq(n->cq[i], n); } @@ -1319,8 +1320,17 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp) int64_t bs_size; uint8_t *pci_conf; - 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 = 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; } @@ -1353,21 +1363,21 @@ static void nvme_realize(PCIDevice *pci_dev, Error **errp) n->num_namespaces = 1; - /* 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 = pow2ceil(NVME_REG_SIZE + - 2 * n->params.num_queues * NVME_DB_SIZE); + 2 * (n->params.max_ioqpairs + 1) * NVME_DB_SIZE); n->ns_size = bs_size / (uint64_t)n->num_namespaces; n->namespaces = g_new0(NvmeNamespace, n->num_namespaces); - n->sq = g_new0(NvmeSQueue *, n->params.num_queues); - n->cq = g_new0(NvmeCQueue *, n->params.num_queues); + n->sq = g_new0(NvmeSQueue *, n->params.max_ioqpairs + 1); + n->cq = g_new0(NvmeCQueue *, n->params.max_ioqpairs + 1); 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); id->vid = cpu_to_le16(pci_get_word(pci_conf + PCI_VENDOR_ID)); id->ssvid = cpu_to_le16(pci_get_word(pci_conf + PCI_SUBSYSTEM_VENDOR_ID)); diff --git a/hw/block/nvme.h b/hw/block/nvme.h index 9957c4a200e2..1617787af2e9 100644 --- a/hw/block/nvme.h +++ b/hw/block/nvme.h @@ -6,11 +6,13 @@ #define DEFINE_NVME_PROPERTIES(_state, _props) \ DEFINE_PROP_STRING("serial", _state, _props.serial), \ DEFINE_PROP_UINT32("cmb_size_mb", _state, _props.cmb_size_mb, 0), \ - DEFINE_PROP_UINT32("num_queues", _state, _props.num_queues, 64) + DEFINE_PROP_UINT32("num_queues", _state, _props.num_queues, 0), \ + DEFINE_PROP_UINT32("max_ioqpairs", _state, _props.max_ioqpairs, 64) 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;