From patchwork Mon Mar 16 14:29:09 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Klaus Jensen X-Patchwork-Id: 1255628 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=irrelevant.dk 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 ozlabs.org (Postfix) with ESMTPS id 48h2TB25vnz9sPk for ; Tue, 17 Mar 2020 03:54:22 +1100 (AEDT) Received: from localhost ([::1]:42850 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jDt0O-0000Xm-65 for incoming@patchwork.ozlabs.org; Mon, 16 Mar 2020 12:54:20 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:54272) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jDqlK-0000TX-Lr for qemu-devel@nongnu.org; Mon, 16 Mar 2020 10:30:43 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jDqlD-0004dk-3e for qemu-devel@nongnu.org; Mon, 16 Mar 2020 10:30:38 -0400 Received: from charlie.dont.surf ([128.199.63.193]:48814) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jDql6-0001yU-VN; Mon, 16 Mar 2020 10:30:25 -0400 Received: from apples.local (80-62-117-52-mobile.dk.customer.tdc.net [80.62.117.52]) by charlie.dont.surf (Postfix) with ESMTPSA id 344A7BF967; Mon, 16 Mar 2020 14:29:47 +0000 (UTC) From: Klaus Jensen To: qemu-block@nongnu.org Subject: [PATCH v6 23/42] nvme: add mapping helpers Date: Mon, 16 Mar 2020 07:29:09 -0700 Message-Id: <20200316142928.153431-24-its@irrelevant.dk> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200316142928.153431-1-its@irrelevant.dk> References: <20200316142928.153431-1-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 , qemu-devel@nongnu.org, Max Reitz , Klaus Jensen , Keith Busch , Javier Gonzalez , Maxim Levitsky Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" From: Klaus Jensen Add nvme_map_addr, nvme_map_addr_cmb and nvme_addr_to_cmb helpers and use them in nvme_map_prp. This fixes a bug where in the case of a CMB transfer, the device would map to the buffer with a wrong length. Fixes: b2b2b67a00574 ("nvme: Add support for Read Data and Write Data in CMBs.") Signed-off-by: Klaus Jensen --- hw/block/nvme.c | 97 +++++++++++++++++++++++++++++++++++-------- hw/block/trace-events | 1 + 2 files changed, 81 insertions(+), 17 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index 08267e847671..187c816eb6ad 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -59,6 +59,11 @@ static void nvme_process_sq(void *opaque); +static inline void *nvme_addr_to_cmb(NvmeCtrl *n, hwaddr addr) +{ + return &n->cmbuf[addr - n->ctrl_mem.addr]; +} + static inline bool nvme_addr_is_cmb(NvmeCtrl *n, hwaddr addr) { hwaddr low = n->ctrl_mem.addr; @@ -70,7 +75,7 @@ static inline bool nvme_addr_is_cmb(NvmeCtrl *n, hwaddr addr) static void nvme_addr_read(NvmeCtrl *n, hwaddr addr, void *buf, int size) { if (n->bar.cmbsz && nvme_addr_is_cmb(n, addr)) { - memcpy(buf, (void *)&n->cmbuf[addr - n->ctrl_mem.addr], size); + memcpy(buf, nvme_addr_to_cmb(n, addr), size); return; } @@ -153,29 +158,79 @@ static void nvme_irq_deassert(NvmeCtrl *n, NvmeCQueue *cq) } } +static uint16_t nvme_map_addr_cmb(NvmeCtrl *n, QEMUIOVector *iov, hwaddr addr, + size_t len) +{ + if (!nvme_addr_is_cmb(n, addr) || !nvme_addr_is_cmb(n, addr + len)) { + return NVME_DATA_TRAS_ERROR; + } + + qemu_iovec_add(iov, nvme_addr_to_cmb(n, addr), len); + + return NVME_SUCCESS; +} + +static uint16_t nvme_map_addr(NvmeCtrl *n, QEMUSGList *qsg, QEMUIOVector *iov, + hwaddr addr, size_t len) +{ + if (nvme_addr_is_cmb(n, addr)) { + if (qsg && qsg->sg) { + return NVME_INVALID_USE_OF_CMB | NVME_DNR; + } + + assert(iov); + + if (!iov->iov) { + qemu_iovec_init(iov, 1); + } + + return nvme_map_addr_cmb(n, iov, addr, len); + } + + if (iov && iov->iov) { + return NVME_INVALID_USE_OF_CMB | NVME_DNR; + } + + assert(qsg); + + if (!qsg->sg) { + pci_dma_sglist_init(qsg, &n->parent_obj, 1); + } + + qemu_sglist_add(qsg, addr, len); + + return NVME_SUCCESS; +} + static uint16_t nvme_map_prp(QEMUSGList *qsg, QEMUIOVector *iov, uint64_t prp1, uint64_t prp2, uint32_t len, NvmeCtrl *n) { hwaddr trans_len = n->page_size - (prp1 % n->page_size); trans_len = MIN(len, trans_len); int num_prps = (len >> n->page_bits) + 1; + uint16_t status; if (unlikely(!prp1)) { trace_nvme_dev_err_invalid_prp(); return NVME_INVALID_FIELD | NVME_DNR; - } else if (n->bar.cmbsz && prp1 >= n->ctrl_mem.addr && - prp1 < n->ctrl_mem.addr + int128_get64(n->ctrl_mem.size)) { - qsg->nsg = 0; + } + + if (nvme_addr_is_cmb(n, prp1)) { qemu_iovec_init(iov, num_prps); - qemu_iovec_add(iov, (void *)&n->cmbuf[prp1 - n->ctrl_mem.addr], trans_len); } else { pci_dma_sglist_init(qsg, &n->parent_obj, num_prps); - qemu_sglist_add(qsg, prp1, trans_len); } + + status = nvme_map_addr(n, qsg, iov, prp1, trans_len); + if (status) { + goto unmap; + } + len -= trans_len; if (len) { if (unlikely(!prp2)) { trace_nvme_dev_err_invalid_prp2_missing(); + status = NVME_INVALID_FIELD | NVME_DNR; goto unmap; } if (len > n->page_size) { @@ -192,6 +247,7 @@ static uint16_t nvme_map_prp(QEMUSGList *qsg, QEMUIOVector *iov, uint64_t prp1, if (i == n->max_prp_ents - 1 && len > n->page_size) { if (unlikely(!prp_ent || prp_ent & (n->page_size - 1))) { trace_nvme_dev_err_invalid_prplist_ent(prp_ent); + status = NVME_INVALID_FIELD | NVME_DNR; goto unmap; } @@ -205,14 +261,14 @@ static uint16_t nvme_map_prp(QEMUSGList *qsg, QEMUIOVector *iov, uint64_t prp1, if (unlikely(!prp_ent || prp_ent & (n->page_size - 1))) { trace_nvme_dev_err_invalid_prplist_ent(prp_ent); + status = NVME_INVALID_FIELD | NVME_DNR; goto unmap; } trans_len = MIN(len, n->page_size); - if (qsg->nsg){ - qemu_sglist_add(qsg, prp_ent, trans_len); - } else { - qemu_iovec_add(iov, (void *)&n->cmbuf[prp_ent - n->ctrl_mem.addr], trans_len); + status = nvme_map_addr(n, qsg, iov, prp_ent, trans_len); + if (status) { + goto unmap; } len -= trans_len; i++; @@ -220,20 +276,27 @@ static uint16_t nvme_map_prp(QEMUSGList *qsg, QEMUIOVector *iov, uint64_t prp1, } else { if (unlikely(prp2 & (n->page_size - 1))) { trace_nvme_dev_err_invalid_prp2_align(prp2); + status = NVME_INVALID_FIELD | NVME_DNR; goto unmap; } - if (qsg->nsg) { - qemu_sglist_add(qsg, prp2, len); - } else { - qemu_iovec_add(iov, (void *)&n->cmbuf[prp2 - n->ctrl_mem.addr], trans_len); + status = nvme_map_addr(n, qsg, iov, prp2, len); + if (status) { + goto unmap; } } } return NVME_SUCCESS; - unmap: - qemu_sglist_destroy(qsg); - return NVME_INVALID_FIELD | NVME_DNR; +unmap: + if (iov && iov->iov) { + qemu_iovec_destroy(iov); + } + + if (qsg && qsg->sg) { + qemu_sglist_destroy(qsg); + } + + return status; } static uint16_t nvme_dma_write_prp(NvmeCtrl *n, uint8_t *ptr, uint32_t len, diff --git a/hw/block/trace-events b/hw/block/trace-events index 4cde0844ef64..adf11313f956 100644 --- a/hw/block/trace-events +++ b/hw/block/trace-events @@ -33,6 +33,7 @@ nvme_dev_irq_msix(uint32_t vector) "raising MSI-X IRQ vector %u" nvme_dev_irq_pin(void) "pulsing IRQ pin" nvme_dev_irq_masked(void) "IRQ is masked" nvme_dev_dma_read(uint64_t prp1, uint64_t prp2) "DMA read, prp1=0x%"PRIx64" prp2=0x%"PRIx64"" +nvme_dev_map_prp(uint16_t cid, uint8_t opc, uint64_t trans_len, uint32_t len, uint64_t prp1, uint64_t prp2, int num_prps) "cid %"PRIu16" opc 0x%"PRIx8" trans_len %"PRIu64" len %"PRIu32" prp1 0x%"PRIx64" prp2 0x%"PRIx64" num_prps %d" nvme_dev_rw(const char *verb, uint32_t blk_count, uint64_t byte_count, uint64_t lba) "%s %"PRIu32" blocks (%"PRIu64" bytes) from LBA %"PRIu64"" nvme_dev_create_sq(uint64_t addr, uint16_t sqid, uint16_t cqid, uint16_t qsize, uint16_t qflags) "create submission queue, addr=0x%"PRIx64", sqid=%"PRIu16", cqid=%"PRIu16", qsize=%"PRIu16", qflags=%"PRIu16"" nvme_dev_create_cq(uint64_t addr, uint16_t cqid, uint16_t vector, uint16_t size, uint16_t qflags, int ien) "create completion queue, addr=0x%"PRIx64", cqid=%"PRIu16", vector=%"PRIu16", qsize=%"PRIu16", qflags=%"PRIu16", ien=%d"