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IronPort-SDR: rCDzD1GnvzHPrfumH5Uq32+5RJB7Th5XFRXJ9hXcyZtTCEQBx1dpD2RIgZp3JGUCklkZNKFqZz 7FkN6tp0S7/Oc78RPg1C13in/m15N+LzPjlL7hfSS+0zTtGy87kibVWMZ/jdK2aQWO8R/R5y8x pIw6b6Lj+MYl2AngbGU3CZAjEsKdTqs4xF3J2nQLOt6Yy/7xQBhPuUiyjk7sjzrkpkogVzMzh/ G4ZSvRNWwsKisIWBL+sutsQoYznwfm82rsMMlgC0buUn4v290nCytTcov4dxoFZQkUd5yTZgTj qYo= X-IronPort-AV: E=Sophos;i="5.77,431,1596470400"; d="scan'208";a="155748062" IronPort-SDR: h33n1UKrBygRz6UxHlGdnyY2zUrssGUQjE0xmWhCDw4UagXAWuXJBdYAH2/FPUtbSgfVO+u7ck i8tPxUyf1kFlgBJvMldhjUq6k3ekPDLQUDHJmejVTDoOyTvUsld/fvsHwdm95Lulf1H/5odkFx E9GBOU+ZeQVqK7TN3OjB93WAUyHiCJELxCD3VVXMf3fHL9SogJ5XFJK0eizIxdx2A4t2e3OdAc EQKd70tkKg5RXOMac2VQCzL7BOFbaerI305NwOmNHYha2PNI1fFiv3LPWyd3WEbq7SGED1awTy CwM2LwWt6Mpp15orMz4E3m2l IronPort-SDR: u2u6bu9W8JsAG5ATL3QlCcKHG0ymvOGinX6Lk8J5xF0zH/FCZBpTeB+kQm1TjfOwhQR4T28BBh fUx3WwJ4t1rd5zak1SOTnxcu0pbh04nfYwEY4PAmV3MYTpjfnXrP1T1kdYB1nKrPxSWxpDfd4+ /5EEt6uA8uC317uCyXFiLV7hGKq1iybQiOy+zlZn5VIuOA+vconsrXC28NaUBn2nmtfQv//Tcm xd03QL74YPYTUcIlB//WUe83Zxb0jFPUSCruT4LocWfEFpGc1ZDV0ksngFmh55V+8GbClk0WNi ec0= WDCIronportException: Internal From: Dmitry Fomichev To: Keith Busch , Klaus Jensen , Kevin Wolf , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Maxim Levitsky , Fam Zheng Subject: [PATCH v8 03/11] hw/block/nvme: Separate read and write handlers Date: Fri, 30 Oct 2020 11:32:34 +0900 Message-Id: <20201030023242.5204-4-dmitry.fomichev@wdc.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20201030023242.5204-1-dmitry.fomichev@wdc.com> References: <20201030023242.5204-1-dmitry.fomichev@wdc.com> MIME-Version: 1.0 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=216.71.153.141; envelope-from=prvs=56530b5a8=dmitry.fomichev@wdc.com; helo=esa3.hgst.iphmx.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/29 22:32:49 X-ACL-Warn: Detected OS = FreeBSD 9.x or newer [fuzzy] X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no 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: Niklas Cassel , Damien Le Moal , qemu-block@nongnu.org, Dmitry Fomichev , qemu-devel@nongnu.org, Alistair Francis , Matias Bjorling Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" With ZNS support in place, the majority of code in nvme_rw() has become read- or write-specific. Move these parts to two separate handlers, nvme_read() and nvme_write() to make the code more readable and to remove multiple is_write checks that so far existed in the i/o path. This is a refactoring patch, no change in functionality. Signed-off-by: Dmitry Fomichev Reviewed-by: Niklas Cassel Acked-by: Klaus Jensen --- hw/block/nvme.c | 91 ++++++++++++++++++++++++++++++------------- hw/block/trace-events | 3 +- 2 files changed, 67 insertions(+), 27 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index 1ec8ccb3e6..3023774484 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -963,6 +963,54 @@ static uint16_t nvme_flush(NvmeCtrl *n, NvmeRequest *r= eq) return NVME_NO_COMPLETE; } =20 +static uint16_t nvme_read(NvmeCtrl *n, NvmeRequest *req) +{ + NvmeRwCmd *rw =3D (NvmeRwCmd *)&req->cmd; + NvmeNamespace *ns =3D req->ns; + uint64_t slba =3D le64_to_cpu(rw->slba); + uint32_t nlb =3D (uint32_t)le16_to_cpu(rw->nlb) + 1; + uint64_t data_size =3D nvme_l2b(ns, nlb); + uint64_t data_offset; + BlockBackend *blk =3D ns->blkconf.blk; + uint16_t status; + + trace_pci_nvme_read(nvme_cid(req), nvme_nsid(ns), nlb, data_size, slba= ); + + status =3D nvme_check_mdts(n, data_size); + if (status) { + trace_pci_nvme_err_mdts(nvme_cid(req), data_size); + goto invalid; + } + + status =3D nvme_check_bounds(n, ns, slba, nlb); + if (status) { + trace_pci_nvme_err_invalid_lba_range(slba, nlb, ns->id_ns.nsze); + goto invalid; + } + + status =3D nvme_map_dptr(n, data_size, req); + if (status) { + goto invalid; + } + + data_offset =3D nvme_l2b(ns, slba); + + block_acct_start(blk_get_stats(blk), &req->acct, data_size, + BLOCK_ACCT_READ); + if (req->qsg.sg) { + req->aiocb =3D dma_blk_read(blk, &req->qsg, data_offset, + BDRV_SECTOR_SIZE, nvme_rw_cb, req); + } else { + req->aiocb =3D blk_aio_preadv(blk, data_offset, &req->iov, 0, + nvme_rw_cb, req); + } + return NVME_NO_COMPLETE; + +invalid: + block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_READ); + return status | NVME_DNR; +} + static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req) { NvmeRwCmd *rw =3D (NvmeRwCmd *)&req->cmd; @@ -988,22 +1036,19 @@ static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeR= equest *req) return NVME_NO_COMPLETE; } =20 -static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req) +static uint16_t nvme_write(NvmeCtrl *n, NvmeRequest *req) { NvmeRwCmd *rw =3D (NvmeRwCmd *)&req->cmd; NvmeNamespace *ns =3D req->ns; - uint32_t nlb =3D (uint32_t)le16_to_cpu(rw->nlb) + 1; uint64_t slba =3D le64_to_cpu(rw->slba); - + uint32_t nlb =3D (uint32_t)le16_to_cpu(rw->nlb) + 1; uint64_t data_size =3D nvme_l2b(ns, nlb); - uint64_t data_offset =3D nvme_l2b(ns, slba); - enum BlockAcctType acct =3D req->cmd.opcode =3D=3D NVME_CMD_WRITE ? - BLOCK_ACCT_WRITE : BLOCK_ACCT_READ; + uint64_t data_offset; BlockBackend *blk =3D ns->blkconf.blk; uint16_t status; =20 - trace_pci_nvme_rw(nvme_cid(req), nvme_io_opc_str(rw->opcode), - nvme_nsid(ns), nlb, data_size, slba); + trace_pci_nvme_write(nvme_cid(req), nvme_io_opc_str(rw->opcode), + nvme_nsid(ns), nlb, data_size, slba); =20 status =3D nvme_check_mdts(n, data_size); if (status) { @@ -1022,29 +1067,22 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *r= eq) goto invalid; } =20 - block_acct_start(blk_get_stats(blk), &req->acct, data_size, acct); + data_offset =3D nvme_l2b(ns, slba); + + block_acct_start(blk_get_stats(blk), &req->acct, data_size, + BLOCK_ACCT_WRITE); if (req->qsg.sg) { - if (acct =3D=3D BLOCK_ACCT_WRITE) { - req->aiocb =3D dma_blk_write(blk, &req->qsg, data_offset, - BDRV_SECTOR_SIZE, nvme_rw_cb, req); - } else { - req->aiocb =3D dma_blk_read(blk, &req->qsg, data_offset, - BDRV_SECTOR_SIZE, nvme_rw_cb, req); - } + req->aiocb =3D dma_blk_write(blk, &req->qsg, data_offset, + BDRV_SECTOR_SIZE, nvme_rw_cb, req); } else { - if (acct =3D=3D BLOCK_ACCT_WRITE) { - req->aiocb =3D blk_aio_pwritev(blk, data_offset, &req->iov, 0, - nvme_rw_cb, req); - } else { - req->aiocb =3D blk_aio_preadv(blk, data_offset, &req->iov, 0, - nvme_rw_cb, req); - } + req->aiocb =3D blk_aio_pwritev(blk, data_offset, &req->iov, 0, + nvme_rw_cb, req); } return NVME_NO_COMPLETE; =20 invalid: - block_acct_invalid(blk_get_stats(ns->blkconf.blk), acct); - return status; + block_acct_invalid(blk_get_stats(blk), BLOCK_ACCT_WRITE); + return status | NVME_DNR; } =20 static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest *req) @@ -1074,8 +1112,9 @@ static uint16_t nvme_io_cmd(NvmeCtrl *n, NvmeRequest = *req) case NVME_CMD_WRITE_ZEROES: return nvme_write_zeroes(n, req); case NVME_CMD_WRITE: + return nvme_write(n, req); case NVME_CMD_READ: - return nvme_rw(n, req); + return nvme_read(n, req); default: assert(false); } diff --git a/hw/block/trace-events b/hw/block/trace-events index 3ea6c29926..d81b1891d8 100644 --- a/hw/block/trace-events +++ b/hw/block/trace-events @@ -40,7 +40,8 @@ pci_nvme_map_prp(uint64_t trans_len, uint32_t len, uint64= _t prp1, uint64_t prp2, pci_nvme_map_sgl(uint16_t cid, uint8_t typ, uint64_t len) "cid %"PRIu16" t= ype 0x%"PRIx8" len %"PRIu64"" pci_nvme_io_cmd(uint16_t cid, uint32_t nsid, uint16_t sqid, uint8_t opcode= , const char *opname) "cid %"PRIu16" nsid %"PRIu32" sqid %"PRIu16" opc 0x%"= PRIx8" opname '%s'" pci_nvme_admin_cmd(uint16_t cid, uint16_t sqid, uint8_t opcode, const char= *opname) "cid %"PRIu16" sqid %"PRIu16" opc 0x%"PRIx8" opname '%s'" -pci_nvme_rw(uint16_t cid, const char *verb, uint32_t nsid, uint32_t nlb, u= int64_t count, uint64_t lba) "cid %"PRIu16" opname '%s' nsid %"PRIu32" nlb = %"PRIu32" count %"PRIu64" lba 0x%"PRIx64"" +pci_nvme_read(uint16_t cid, uint32_t nsid, uint32_t nlb, uint64_t count, u= int64_t lba) "cid %"PRIu16" nsid %"PRIu32" nlb %"PRIu32" count %"PRIu64" lb= a 0x%"PRIx64"" +pci_nvme_write(uint16_t cid, const char *verb, uint32_t nsid, uint32_t nlb= , uint64_t count, uint64_t lba) "cid %"PRIu16" opname '%s' nsid %"PRIu32" n= lb %"PRIu32" count %"PRIu64" lba 0x%"PRIx64"" pci_nvme_rw_cb(uint16_t cid, const char *blkname) "cid %"PRIu16" blk '%s'" pci_nvme_write_zeroes(uint16_t cid, uint32_t nsid, uint64_t slba, uint32_t= nlb) "cid %"PRIu16" nsid %"PRIu32" slba %"PRIu64" nlb %"PRIu32"" pci_nvme_create_sq(uint64_t addr, uint16_t sqid, uint16_t cqid, uint16_t q= size, uint16_t qflags) "create submission queue, addr=3D0x%"PRIx64", sqid= =3D%"PRIu16", cqid=3D%"PRIu16", qsize=3D%"PRIu16", qflags=3D%"PRIu16"" --=20 2.21.0