cf81529ce3
NVMe error log entries include status, so breaking this out into its own data structure allows it to be included in both the nvme_completion data structure as well as error log entry data structures. While here, expose nvme_completion_is_error(), and change all of the places that were explicitly looking at sc/sct bits to use this macro instead. Sponsored by: Intel Reviewed by: carl
205 lines
5.4 KiB
C
205 lines
5.4 KiB
C
/*-
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* Copyright (C) 2012 Intel Corporation
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/conf.h>
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#include <sys/proc.h>
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#include <sys/uio.h>
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#include "nvme_private.h"
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static void
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nvme_uio_done(void *arg, const struct nvme_completion *cpl)
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{
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struct mtx *mtx;
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struct uio *uio = arg;
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if (!nvme_completion_is_error(cpl))
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uio->uio_resid = 0;
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mtx = mtx_pool_find(mtxpool_sleep, arg);
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mtx_lock(mtx);
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wakeup(arg);
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mtx_unlock(mtx);
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}
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void
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nvme_payload_map_uio(void *arg, bus_dma_segment_t *seg, int nseg,
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bus_size_t mapsize, int error)
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{
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struct nvme_tracker *tr = arg;
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/*
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* Now that we know the actual size of the uio, divide it by the
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* sector size that we stored in cdw12.
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*/
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tr->req->cmd.cdw12 = (mapsize / tr->req->cmd.cdw12)-1;
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nvme_payload_map(arg, seg, nseg, error);
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}
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static int
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nvme_read_uio(struct nvme_namespace *ns, struct uio *uio)
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{
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struct nvme_request *req;
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struct nvme_command *cmd;
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uint64_t lba;
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req = nvme_allocate_request_uio(uio, nvme_uio_done, uio);
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if (req == NULL)
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return (ENOMEM);
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cmd = &req->cmd;
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cmd->opc = NVME_OPC_READ;
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cmd->nsid = ns->id;
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lba = uio->uio_offset / nvme_ns_get_sector_size(ns);
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*(uint64_t *)&cmd->cdw10 = lba;
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/*
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* Store the sector size in cdw12 (where the LBA count normally goes).
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* We'll adjust cdw12 in the map_uio callback based on the mapsize
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* parameter. This allows us to not have to store the namespace
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* in the request simply to get the sector size in the map_uio
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* callback.
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*/
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cmd->cdw12 = nvme_ns_get_sector_size(ns);
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nvme_ctrlr_submit_io_request(ns->ctrlr, req);
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return (0);
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}
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static int
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nvme_write_uio(struct nvme_namespace *ns, struct uio *uio)
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{
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struct nvme_request *req;
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struct nvme_command *cmd;
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uint64_t lba;
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req = nvme_allocate_request_uio(uio, nvme_uio_done, uio);
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if (req == NULL)
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return (ENOMEM);
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cmd = &req->cmd;
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cmd->opc = NVME_OPC_WRITE;
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cmd->nsid = ns->id;
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lba = uio->uio_offset / nvme_ns_get_sector_size(ns);
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*(uint64_t *)&cmd->cdw10 = lba;
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/*
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* Store the sector size in cdw12 (where the LBA count normally goes).
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* We'll adjust cdw12 in the map_uio callback based on the mapsize
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* parameter. This allows us to not have to store the namespace
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* in the request simply to get the sector size in the map_uio
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* callback.
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*/
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cmd->cdw12 = nvme_ns_get_sector_size(ns);
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nvme_ctrlr_submit_io_request(ns->ctrlr, req);
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return (0);
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}
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int
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nvme_ns_physio(struct cdev *dev, struct uio *uio, int ioflag)
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{
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struct uio uio_tmp;
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struct iovec uio_iov_tmp;
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struct nvme_namespace *ns;
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struct mtx *mtx;
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int i, nvme_err, physio_err = 0;
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#if __FreeBSD_version > 900017
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int ref;
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#endif
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PHOLD(curproc);
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ns = dev->si_drv1;
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mtx = mtx_pool_find(mtxpool_sleep, &uio_tmp);
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#if __FreeBSD_version > 900017
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dev_refthread(dev, &ref);
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#else
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dev_refthread(dev);
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#endif
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/*
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* NVM Express doesn't really support true SGLs. All SG elements
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* must be PAGE_SIZE, except for the first and last element.
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* Because of this, we need to break up each iovec into a separate
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* NVMe command - otherwise we could end up with sub-PAGE_SIZE
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* elements in the middle of an SGL which is not allowed.
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*/
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uio_tmp.uio_iov = &uio_iov_tmp;
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uio_tmp.uio_iovcnt = 1;
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uio_tmp.uio_offset = uio->uio_offset;
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uio_tmp.uio_segflg = uio->uio_segflg;
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uio_tmp.uio_rw = uio->uio_rw;
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uio_tmp.uio_td = uio->uio_td;
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for (i = 0; i < uio->uio_iovcnt; i++) {
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uio_iov_tmp.iov_base = uio->uio_iov[i].iov_base;
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uio_iov_tmp.iov_len = uio->uio_iov[i].iov_len;
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uio_tmp.uio_resid = uio_iov_tmp.iov_len;
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mtx_lock(mtx);
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if (uio->uio_rw == UIO_READ)
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nvme_err = nvme_read_uio(ns, &uio_tmp);
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else
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nvme_err = nvme_write_uio(ns, &uio_tmp);
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if (nvme_err == 0)
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msleep(&uio_tmp, mtx, PRIBIO, "nvme_physio", 0);
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mtx_unlock(mtx);
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if (uio_tmp.uio_resid == 0) {
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uio->uio_resid -= uio_iov_tmp.iov_len;
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uio->uio_offset += uio_iov_tmp.iov_len;
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} else {
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physio_err = EFAULT;
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break;
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}
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uio_tmp.uio_offset += uio_iov_tmp.iov_len;
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}
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#if __FreeBSD_version > 900017
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dev_relthread(dev, ref);
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#else
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dev_relthread(dev);
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#endif
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PRELE(curproc);
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return (physio_err);
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}
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