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freebsd-skq/usr.sbin/bhyve/pci_nvme.c

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- Add bhyve NVMe device emulation. The initial work on bhyve NVMe device emulation was done by the GSoC student Shunsuke Mie and was heavily modified in performan, functionality and guest support by Leon Dang. bhyve: -s <n>,nvme,devpath,maxq=#,qsz=#,ioslots=#,sectsz=#,ser=A-Z accepted devpath: /dev/blockdev /path/to/image ram=size_in_MiB Tested with guest OS: FreeBSD Head, Linux Fedora fc27, Ubuntu 18.04, OpenSuse 15.0, Windows Server 2016 Datacenter. Tested with all accepted device paths: Real nvme, zdev and also with ram. Tested on: AMD Ryzen Threadripper 1950X 16-Core Processor and Intel(R) Xeon(R) CPU E5-2609 v2 @ 2.50GHz. Tests at: https://people.freebsd.org/~araujo/bhyve_nvme/nvme.txt Submitted by: Shunsuke Mie <sux2mfgj_gmail.com>, Leon Dang <leon_digitalmsx.com> Reviewed by: chuck (early version), grehan Relnotes: Yes Sponsored by: iXsystems Inc. Differential Revision: https://reviews.freebsd.org/D14022
2018-07-05 03:33:58 +00:00
/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2017 Shunsuke Mie
* Copyright (c) 2018 Leon Dang
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* bhyve PCIe-NVMe device emulation.
*
* options:
* -s <n>,nvme,devpath,maxq=#,qsz=#,ioslots=#,sectsz=#,ser=A-Z
*
* accepted devpath:
* /dev/blockdev
* /path/to/image
* ram=size_in_MiB
*
* maxq = max number of queues
* qsz = max elements in each queue
* ioslots = max number of concurrent io requests
* sectsz = sector size (defaults to blockif sector size)
* ser = serial number (20-chars max)
*
*/
/* TODO:
- create async event for smart and log
- intr coalesce
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <assert.h>
#include <pthread.h>
#include <semaphore.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <machine/atomic.h>
#include <machine/vmm.h>
#include <vmmapi.h>
#include <dev/nvme/nvme.h>
#include "bhyverun.h"
#include "block_if.h"
#include "pci_emul.h"
static int nvme_debug = 0;
#define DPRINTF(params) if (nvme_debug) printf params
#define WPRINTF(params) printf params
/* defaults; can be overridden */
#define NVME_MSIX_BAR 4
#define NVME_IOSLOTS 8
#define NVME_QUEUES 16
#define NVME_MAX_QENTRIES 2048
#define NVME_PRP2_ITEMS (PAGE_SIZE/sizeof(uint64_t))
#define NVME_MAX_BLOCKIOVS 512
/* helpers */
#define NVME_DOORBELL_OFFSET offsetof(struct nvme_registers, doorbell)
enum nvme_controller_register_offsets {
NVME_CR_CAP_LOW = 0x00,
NVME_CR_CAP_HI = 0x04,
NVME_CR_VS = 0x08,
NVME_CR_INTMS = 0x0c,
NVME_CR_INTMC = 0x10,
NVME_CR_CC = 0x14,
NVME_CR_CSTS = 0x1c,
NVME_CR_NSSR = 0x20,
NVME_CR_AQA = 0x24,
NVME_CR_ASQ_LOW = 0x28,
NVME_CR_ASQ_HI = 0x2c,
NVME_CR_ACQ_LOW = 0x30,
NVME_CR_ACQ_HI = 0x34,
};
enum nvme_cmd_cdw11 {
NVME_CMD_CDW11_PC = 0x0001,
NVME_CMD_CDW11_IEN = 0x0002,
NVME_CMD_CDW11_IV = 0xFFFF0000,
};
#define NVME_CMD_GET_OPC(opc) \
((opc) >> NVME_CMD_OPC_SHIFT & NVME_CMD_OPC_MASK)
#define NVME_CQ_INTEN 0x01
#define NVME_CQ_INTCOAL 0x02
struct nvme_completion_queue {
struct nvme_completion *qbase;
uint32_t size;
uint16_t tail; /* nvme progress */
uint16_t head; /* guest progress */
uint16_t intr_vec;
uint32_t intr_en;
pthread_mutex_t mtx;
};
struct nvme_submission_queue {
struct nvme_command *qbase;
uint32_t size;
uint16_t head; /* nvme progress */
uint16_t tail; /* guest progress */
uint16_t cqid; /* completion queue id */
int busy; /* queue is being processed */
int qpriority;
};
enum nvme_storage_type {
NVME_STOR_BLOCKIF = 0,
NVME_STOR_RAM = 1,
};
struct pci_nvme_blockstore {
enum nvme_storage_type type;
void *ctx;
uint64_t size;
uint32_t sectsz;
uint32_t sectsz_bits;
};
struct pci_nvme_ioreq {
struct pci_nvme_softc *sc;
struct pci_nvme_ioreq *next;
struct nvme_submission_queue *nvme_sq;
uint16_t sqid;
/* command information */
uint16_t opc;
uint16_t cid;
uint32_t nsid;
uint64_t prev_gpaddr;
size_t prev_size;
/*
* lock if all iovs consumed (big IO);
* complete transaction before continuing
*/
pthread_mutex_t mtx;
pthread_cond_t cv;
struct blockif_req io_req;
/* pad to fit up to 512 page descriptors from guest IO request */
struct iovec iovpadding[NVME_MAX_BLOCKIOVS-BLOCKIF_IOV_MAX];
};
struct pci_nvme_softc {
struct pci_devinst *nsc_pi;
pthread_mutex_t mtx;
struct nvme_registers regs;
struct nvme_namespace_data nsdata;
struct nvme_controller_data ctrldata;
struct pci_nvme_blockstore nvstore;
uint16_t max_qentries; /* max entries per queue */
uint32_t max_queues;
uint32_t num_cqueues;
uint32_t num_squeues;
struct pci_nvme_ioreq *ioreqs;
struct pci_nvme_ioreq *ioreqs_free; /* free list of ioreqs */
uint32_t pending_ios;
uint32_t ioslots;
sem_t iosemlock;
/* status and guest memory mapped queues */
struct nvme_completion_queue *compl_queues;
struct nvme_submission_queue *submit_queues;
/* controller features */
uint32_t intr_coales_aggr_time; /* 0x08: uS to delay intr */
uint32_t intr_coales_aggr_thresh; /* 0x08: compl-Q entries */
uint32_t async_ev_config; /* 0x0B: async event config */
};
static void pci_nvme_io_partial(struct blockif_req *br, int err);
/* Controller Configuration utils */
#define NVME_CC_GET_EN(cc) \
((cc) >> NVME_CC_REG_EN_SHIFT & NVME_CC_REG_EN_MASK)
#define NVME_CC_GET_CSS(cc) \
((cc) >> NVME_CC_REG_CSS_SHIFT & NVME_CC_REG_CSS_MASK)
#define NVME_CC_GET_SHN(cc) \
((cc) >> NVME_CC_REG_SHN_SHIFT & NVME_CC_REG_SHN_MASK)
#define NVME_CC_GET_IOSQES(cc) \
((cc) >> NVME_CC_REG_IOSQES_SHIFT & NVME_CC_REG_IOSQES_MASK)
#define NVME_CC_GET_IOCQES(cc) \
((cc) >> NVME_CC_REG_IOCQES_SHIFT & NVME_CC_REG_IOCQES_MASK)
#define NVME_CC_WRITE_MASK \
((NVME_CC_REG_EN_MASK << NVME_CC_REG_EN_SHIFT) | \
(NVME_CC_REG_IOSQES_MASK << NVME_CC_REG_IOSQES_SHIFT) | \
(NVME_CC_REG_IOCQES_MASK << NVME_CC_REG_IOCQES_SHIFT))
#define NVME_CC_NEN_WRITE_MASK \
((NVME_CC_REG_CSS_MASK << NVME_CC_REG_CSS_SHIFT) | \
(NVME_CC_REG_MPS_MASK << NVME_CC_REG_MPS_SHIFT) | \
(NVME_CC_REG_AMS_MASK << NVME_CC_REG_AMS_SHIFT))
/* Controller Status utils */
#define NVME_CSTS_GET_RDY(sts) \
((sts) >> NVME_CSTS_REG_RDY_SHIFT & NVME_CSTS_REG_RDY_MASK)
#define NVME_CSTS_RDY (1 << NVME_CSTS_REG_RDY_SHIFT)
/* Completion Queue status word utils */
#define NVME_STATUS_P (1 << NVME_STATUS_P_SHIFT)
#define NVME_STATUS_MASK \
((NVME_STATUS_SCT_MASK << NVME_STATUS_SCT_SHIFT) |\
(NVME_STATUS_SC_MASK << NVME_STATUS_SC_SHIFT))
static __inline void
pci_nvme_status_tc(uint16_t *status, uint16_t type, uint16_t code)
{
*status &= ~NVME_STATUS_MASK;
*status |= (type & NVME_STATUS_SCT_MASK) << NVME_STATUS_SCT_SHIFT |
(code & NVME_STATUS_SC_MASK) << NVME_STATUS_SC_SHIFT;
}
static __inline void
pci_nvme_status_genc(uint16_t *status, uint16_t code)
{
pci_nvme_status_tc(status, NVME_SCT_GENERIC, code);
}
static __inline void
pci_nvme_toggle_phase(uint16_t *status, int prev)
{
if (prev)
*status &= ~NVME_STATUS_P;
else
*status |= NVME_STATUS_P;
}
static void
pci_nvme_init_ctrldata(struct pci_nvme_softc *sc)
{
struct nvme_controller_data *cd = &sc->ctrldata;
cd->vid = 0xFB5D;
cd->ssvid = 0x0000;
cd->mn[0] = 'b';
cd->mn[1] = 'h';
cd->mn[2] = 'y';
cd->mn[3] = 'v';
cd->mn[4] = 'e';
cd->mn[5] = '-';
cd->mn[6] = 'N';
cd->mn[7] = 'V';
cd->mn[8] = 'M';
cd->mn[9] = 'e';
cd->fr[0] = '1';
cd->fr[1] = '.';
cd->fr[2] = '0';
/* Num of submission commands that we can handle at a time (2^rab) */
cd->rab = 4;
/* FreeBSD OUI */
cd->ieee[0] = 0x58;
cd->ieee[1] = 0x9c;
cd->ieee[2] = 0xfc;
cd->mic = 0;
cd->mdts = 9; /* max data transfer size (2^mdts * CAP.MPSMIN) */
cd->ver = 0x00010300;
cd->oacs = 1 << NVME_CTRLR_DATA_OACS_FORMAT_SHIFT;
cd->acl = 2;
cd->aerl = 4;
cd->lpa = 0; /* TODO: support some simple things like SMART */
cd->elpe = 0; /* max error log page entries */
cd->npss = 1; /* number of power states support */
/* Warning Composite Temperature Threshold */
cd->wctemp = 0x0157;
cd->sqes = (6 << NVME_CTRLR_DATA_SQES_MAX_SHIFT) |
(6 << NVME_CTRLR_DATA_SQES_MIN_SHIFT);
cd->cqes = (4 << NVME_CTRLR_DATA_CQES_MAX_SHIFT) |
(4 << NVME_CTRLR_DATA_CQES_MIN_SHIFT);
cd->nn = 1; /* number of namespaces */
cd->fna = 0x03;
cd->power_state[0].mp = 10;
}
static void
pci_nvme_init_nsdata(struct pci_nvme_softc *sc)
{
struct nvme_namespace_data *nd;
nd = &sc->nsdata;
nd->nsze = sc->nvstore.size / sc->nvstore.sectsz;
nd->ncap = nd->nsze;
nd->nuse = nd->nsze;
/* Get LBA and backstore information from backing store */
nd->nlbaf = 1;
/* LBA data-sz = 2^lbads */
nd->lbaf[0] = sc->nvstore.sectsz_bits << NVME_NS_DATA_LBAF_LBADS_SHIFT;
nd->flbas = 0;
}
static void
pci_nvme_reset(struct pci_nvme_softc *sc)
{
DPRINTF(("%s\r\n", __func__));
sc->regs.cap_lo = (sc->max_qentries & NVME_CAP_LO_REG_MQES_MASK) |
(1 << NVME_CAP_LO_REG_CQR_SHIFT) |
(60 << NVME_CAP_LO_REG_TO_SHIFT);
sc->regs.cap_hi = 1 << NVME_CAP_HI_REG_CSS_NVM_SHIFT;
sc->regs.vs = 0x00010300; /* NVMe v1.3 */
sc->regs.cc = 0;
sc->regs.csts = 0;
if (sc->submit_queues != NULL) {
pthread_mutex_lock(&sc->mtx);
sc->num_cqueues = sc->num_squeues = sc->max_queues;
for (int i = 0; i <= sc->max_queues; i++) {
/*
* The Admin Submission Queue is at index 0.
* It must not be changed at reset otherwise the
* emulation will be out of sync with the guest.
*/
if (i != 0) {
sc->submit_queues[i].qbase = NULL;
sc->submit_queues[i].size = 0;
sc->submit_queues[i].cqid = 0;
sc->compl_queues[i].qbase = NULL;
sc->compl_queues[i].size = 0;
}
sc->submit_queues[i].tail = 0;
sc->submit_queues[i].head = 0;
sc->submit_queues[i].busy = 0;
sc->compl_queues[i].tail = 0;
sc->compl_queues[i].head = 0;
}
pthread_mutex_unlock(&sc->mtx);
} else
sc->submit_queues = calloc(sc->max_queues + 1,
sizeof(struct nvme_submission_queue));
if (sc->compl_queues == NULL) {
sc->compl_queues = calloc(sc->max_queues + 1,
sizeof(struct nvme_completion_queue));
for (int i = 0; i <= sc->num_cqueues; i++)
pthread_mutex_init(&sc->compl_queues[i].mtx, NULL);
}
}
static void
pci_nvme_init_controller(struct vmctx *ctx, struct pci_nvme_softc *sc)
{
uint16_t acqs, asqs;
DPRINTF(("%s\r\n", __func__));
asqs = (sc->regs.aqa & NVME_AQA_REG_ASQS_MASK) + 1;
sc->submit_queues[0].size = asqs;
sc->submit_queues[0].qbase = vm_map_gpa(ctx, sc->regs.asq,
sizeof(struct nvme_command) * asqs);
DPRINTF(("%s mapping Admin-SQ guest 0x%lx, host: %p\r\n",
__func__, sc->regs.asq, sc->submit_queues[0].qbase));
acqs = ((sc->regs.aqa >> NVME_AQA_REG_ACQS_SHIFT) &
NVME_AQA_REG_ACQS_MASK) + 1;
sc->compl_queues[0].size = acqs;
sc->compl_queues[0].qbase = vm_map_gpa(ctx, sc->regs.acq,
sizeof(struct nvme_completion) * acqs);
DPRINTF(("%s mapping Admin-CQ guest 0x%lx, host: %p\r\n",
__func__, sc->regs.acq, sc->compl_queues[0].qbase));
}
static int
nvme_opc_delete_io_sq(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
uint16_t qid = command->cdw10 & 0xffff;
DPRINTF(("%s DELETE_IO_SQ %u\r\n", __func__, qid));
if (qid == 0 || qid > sc->num_cqueues) {
WPRINTF(("%s NOT PERMITTED queue id %u / num_squeues %u\r\n",
__func__, qid, sc->num_squeues));
pci_nvme_status_tc(&compl->status, NVME_SCT_COMMAND_SPECIFIC,
NVME_SC_INVALID_QUEUE_IDENTIFIER);
return (1);
}
sc->submit_queues[qid].qbase = NULL;
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
return (1);
}
static int
nvme_opc_create_io_sq(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
if (command->cdw11 & NVME_CMD_CDW11_PC) {
uint16_t qid = command->cdw10 & 0xffff;
struct nvme_submission_queue *nsq;
if (qid > sc->num_squeues) {
WPRINTF(("%s queue index %u > num_squeues %u\r\n",
__func__, qid, sc->num_squeues));
pci_nvme_status_tc(&compl->status,
NVME_SCT_COMMAND_SPECIFIC,
NVME_SC_INVALID_QUEUE_IDENTIFIER);
return (1);
}
nsq = &sc->submit_queues[qid];
nsq->size = ((command->cdw10 >> 16) & 0xffff) + 1;
nsq->qbase = vm_map_gpa(sc->nsc_pi->pi_vmctx, command->prp1,
sizeof(struct nvme_command) * (size_t)nsq->size);
nsq->cqid = (command->cdw11 >> 16) & 0xffff;
nsq->qpriority = (command->cdw11 >> 1) & 0x03;
DPRINTF(("%s sq %u size %u gaddr %p cqid %u\r\n", __func__,
qid, nsq->size, nsq->qbase, nsq->cqid));
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
DPRINTF(("%s completed creating IOSQ qid %u\r\n",
__func__, qid));
} else {
/*
* Guest sent non-cont submission queue request.
* This setting is unsupported by this emulation.
*/
WPRINTF(("%s unsupported non-contig (list-based) "
"create i/o submission queue\r\n", __func__));
pci_nvme_status_genc(&compl->status, NVME_SC_INVALID_FIELD);
}
return (1);
}
static int
nvme_opc_delete_io_cq(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
uint16_t qid = command->cdw10 & 0xffff;
DPRINTF(("%s DELETE_IO_CQ %u\r\n", __func__, qid));
if (qid == 0 || qid > sc->num_cqueues) {
WPRINTF(("%s queue index %u / num_cqueues %u\r\n",
__func__, qid, sc->num_cqueues));
pci_nvme_status_tc(&compl->status, NVME_SCT_COMMAND_SPECIFIC,
NVME_SC_INVALID_QUEUE_IDENTIFIER);
return (1);
}
sc->compl_queues[qid].qbase = NULL;
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
return (1);
}
static int
nvme_opc_create_io_cq(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
if (command->cdw11 & NVME_CMD_CDW11_PC) {
uint16_t qid = command->cdw10 & 0xffff;
struct nvme_completion_queue *ncq;
if (qid > sc->num_cqueues) {
WPRINTF(("%s queue index %u > num_cqueues %u\r\n",
__func__, qid, sc->num_cqueues));
pci_nvme_status_tc(&compl->status,
NVME_SCT_COMMAND_SPECIFIC,
NVME_SC_INVALID_QUEUE_IDENTIFIER);
return (1);
}
ncq = &sc->compl_queues[qid];
ncq->intr_en = (command->cdw11 & NVME_CMD_CDW11_IEN) >> 1;
ncq->intr_vec = (command->cdw11 >> 16) & 0xffff;
ncq->size = ((command->cdw10 >> 16) & 0xffff) + 1;
ncq->qbase = vm_map_gpa(sc->nsc_pi->pi_vmctx,
command->prp1,
sizeof(struct nvme_command) * (size_t)ncq->size);
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
} else {
/*
* Non-contig completion queue unsupported.
*/
WPRINTF(("%s unsupported non-contig (list-based) "
"create i/o completion queue\r\n",
__func__));
/* 0x12 = Invalid Use of Controller Memory Buffer */
pci_nvme_status_genc(&compl->status, 0x12);
}
return (1);
}
static int
nvme_opc_get_log_page(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
uint32_t logsize = (1 + ((command->cdw10 >> 16) & 0xFFF)) * 2;
uint8_t logpage = command->cdw10 & 0xFF;
void *data;
DPRINTF(("%s log page %u len %u\r\n", __func__, logpage, logsize));
if (logpage >= 1 && logpage <= 3)
data = vm_map_gpa(sc->nsc_pi->pi_vmctx, command->prp1,
PAGE_SIZE);
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
switch (logpage) {
case 0x01: /* Error information */
memset(data, 0, logsize > PAGE_SIZE ? PAGE_SIZE : logsize);
break;
case 0x02: /* SMART/Health information */
/* TODO: present some smart info */
memset(data, 0, logsize > PAGE_SIZE ? PAGE_SIZE : logsize);
break;
case 0x03: /* Firmware slot information */
memset(data, 0, logsize > PAGE_SIZE ? PAGE_SIZE : logsize);
break;
default:
WPRINTF(("%s get log page %x command not supported\r\n",
__func__, logpage));
pci_nvme_status_tc(&compl->status, NVME_SCT_COMMAND_SPECIFIC,
NVME_SC_INVALID_LOG_PAGE);
}
return (1);
}
static int
nvme_opc_identify(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
void *dest;
DPRINTF(("%s identify 0x%x nsid 0x%x\r\n", __func__,
command->cdw10 & 0xFF, command->nsid));
switch (command->cdw10 & 0xFF) {
case 0x00: /* return Identify Namespace data structure */
dest = vm_map_gpa(sc->nsc_pi->pi_vmctx, command->prp1,
sizeof(sc->nsdata));
memcpy(dest, &sc->nsdata, sizeof(sc->nsdata));
break;
case 0x01: /* return Identify Controller data structure */
dest = vm_map_gpa(sc->nsc_pi->pi_vmctx, command->prp1,
sizeof(sc->ctrldata));
memcpy(dest, &sc->ctrldata, sizeof(sc->ctrldata));
break;
case 0x02: /* list of 1024 active NSIDs > CDW1.NSID */
dest = vm_map_gpa(sc->nsc_pi->pi_vmctx, command->prp1,
sizeof(uint32_t) * 1024);
((uint32_t *)dest)[0] = 1;
((uint32_t *)dest)[1] = 0;
break;
case 0x11:
pci_nvme_status_genc(&compl->status,
NVME_SC_INVALID_NAMESPACE_OR_FORMAT);
return (1);
case 0x03: /* list of NSID structures in CDW1.NSID, 4096 bytes */
case 0x10:
case 0x12:
case 0x13:
case 0x14:
case 0x15:
default:
DPRINTF(("%s unsupported identify command requested 0x%x\r\n",
__func__, command->cdw10 & 0xFF));
pci_nvme_status_genc(&compl->status, NVME_SC_INVALID_FIELD);
return (1);
}
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
return (1);
}
static int
nvme_opc_set_features(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
int feature = command->cdw10 & 0x0F;
uint32_t iv;
DPRINTF(("%s feature 0x%x\r\n", __func__, feature));
compl->cdw0 = 0;
switch (feature) {
case NVME_FEAT_ARBITRATION:
DPRINTF((" arbitration 0x%x\r\n", command->cdw11));
break;
case NVME_FEAT_POWER_MANAGEMENT:
DPRINTF((" power management 0x%x\r\n", command->cdw11));
break;
case NVME_FEAT_LBA_RANGE_TYPE:
DPRINTF((" lba range 0x%x\r\n", command->cdw11));
break;
case NVME_FEAT_TEMPERATURE_THRESHOLD:
DPRINTF((" temperature threshold 0x%x\r\n", command->cdw11));
break;
case NVME_FEAT_ERROR_RECOVERY:
DPRINTF((" error recovery 0x%x\r\n", command->cdw11));
break;
case NVME_FEAT_VOLATILE_WRITE_CACHE:
DPRINTF((" volatile write cache 0x%x\r\n", command->cdw11));
break;
case NVME_FEAT_NUMBER_OF_QUEUES:
sc->num_squeues = command->cdw11 & 0xFFFF;
sc->num_cqueues = (command->cdw11 >> 16) & 0xFFFF;
DPRINTF((" number of queues (submit %u, completion %u)\r\n",
sc->num_squeues, sc->num_cqueues));
if (sc->num_squeues == 0 || sc->num_squeues > sc->max_queues)
sc->num_squeues = sc->max_queues;
if (sc->num_cqueues == 0 || sc->num_cqueues > sc->max_queues)
sc->num_cqueues = sc->max_queues;
compl->cdw0 = (sc->num_squeues & 0xFFFF) |
((sc->num_cqueues & 0xFFFF) << 16);
break;
case NVME_FEAT_INTERRUPT_COALESCING:
DPRINTF((" interrupt coalescing 0x%x\r\n", command->cdw11));
/* in uS */
sc->intr_coales_aggr_time = ((command->cdw11 >> 8) & 0xFF)*100;
sc->intr_coales_aggr_thresh = command->cdw11 & 0xFF;
break;
case NVME_FEAT_INTERRUPT_VECTOR_CONFIGURATION:
iv = command->cdw11 & 0xFFFF;
DPRINTF((" interrupt vector configuration 0x%x\r\n",
command->cdw11));
for (uint32_t i = 0; i <= sc->num_cqueues; i++) {
if (sc->compl_queues[i].intr_vec == iv) {
if (command->cdw11 & (1 << 16))
sc->compl_queues[i].intr_en |=
NVME_CQ_INTCOAL;
else
sc->compl_queues[i].intr_en &=
~NVME_CQ_INTCOAL;
}
}
break;
case NVME_FEAT_WRITE_ATOMICITY:
DPRINTF((" write atomicity 0x%x\r\n", command->cdw11));
break;
case NVME_FEAT_ASYNC_EVENT_CONFIGURATION:
DPRINTF((" async event configuration 0x%x\r\n",
command->cdw11));
sc->async_ev_config = command->cdw11;
break;
case NVME_FEAT_SOFTWARE_PROGRESS_MARKER:
DPRINTF((" software progress marker 0x%x\r\n",
command->cdw11));
break;
case 0x0C:
DPRINTF((" autonomous power state transition 0x%x\r\n",
command->cdw11));
break;
default:
WPRINTF(("%s invalid feature\r\n", __func__));
pci_nvme_status_genc(&compl->status, NVME_SC_INVALID_FIELD);
return (1);
}
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
return (1);
}
static int
nvme_opc_get_features(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
int feature = command->cdw10 & 0x0F;
DPRINTF(("%s feature 0x%x\r\n", __func__, feature));
compl->cdw0 = 0;
switch (feature) {
case NVME_FEAT_ARBITRATION:
DPRINTF((" arbitration\r\n"));
break;
case NVME_FEAT_POWER_MANAGEMENT:
DPRINTF((" power management\r\n"));
break;
case NVME_FEAT_LBA_RANGE_TYPE:
DPRINTF((" lba range\r\n"));
break;
case NVME_FEAT_TEMPERATURE_THRESHOLD:
DPRINTF((" temperature threshold\r\n"));
switch ((command->cdw11 >> 20) & 0x3) {
case 0:
/* Over temp threshold */
compl->cdw0 = 0xFFFF;
break;
case 1:
/* Under temp threshold */
compl->cdw0 = 0;
break;
default:
WPRINTF((" invalid threshold type select\r\n"));
pci_nvme_status_genc(&compl->status,
NVME_SC_INVALID_FIELD);
return (1);
}
break;
case NVME_FEAT_ERROR_RECOVERY:
DPRINTF((" error recovery\r\n"));
break;
case NVME_FEAT_VOLATILE_WRITE_CACHE:
DPRINTF((" volatile write cache\r\n"));
break;
case NVME_FEAT_NUMBER_OF_QUEUES:
compl->cdw0 = 0;
if (sc->num_squeues == 0)
compl->cdw0 |= sc->max_queues & 0xFFFF;
else
compl->cdw0 |= sc->num_squeues & 0xFFFF;
if (sc->num_cqueues == 0)
compl->cdw0 |= (sc->max_queues & 0xFFFF) << 16;
else
compl->cdw0 |= (sc->num_cqueues & 0xFFFF) << 16;
DPRINTF((" number of queues (submit %u, completion %u)\r\n",
compl->cdw0 & 0xFFFF,
(compl->cdw0 >> 16) & 0xFFFF));
break;
case NVME_FEAT_INTERRUPT_COALESCING:
DPRINTF((" interrupt coalescing\r\n"));
break;
case NVME_FEAT_INTERRUPT_VECTOR_CONFIGURATION:
DPRINTF((" interrupt vector configuration\r\n"));
break;
case NVME_FEAT_WRITE_ATOMICITY:
DPRINTF((" write atomicity\r\n"));
break;
case NVME_FEAT_ASYNC_EVENT_CONFIGURATION:
DPRINTF((" async event configuration\r\n"));
sc->async_ev_config = command->cdw11;
break;
case NVME_FEAT_SOFTWARE_PROGRESS_MARKER:
DPRINTF((" software progress marker\r\n"));
break;
case 0x0C:
DPRINTF((" autonomous power state transition\r\n"));
break;
default:
WPRINTF(("%s invalid feature 0x%x\r\n", __func__, feature));
pci_nvme_status_genc(&compl->status, NVME_SC_INVALID_FIELD);
return (1);
}
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
return (1);
}
static int
nvme_opc_abort(struct pci_nvme_softc* sc, struct nvme_command* command,
struct nvme_completion* compl)
{
DPRINTF(("%s submission queue %u, command ID 0x%x\r\n", __func__,
command->cdw10 & 0xFFFF, (command->cdw10 >> 16) & 0xFFFF));
/* TODO: search for the command ID and abort it */
compl->cdw0 = 1;
pci_nvme_status_genc(&compl->status, NVME_SC_SUCCESS);
return (1);
}
static int
nvme_opc_async_event_req(struct pci_nvme_softc* sc,
struct nvme_command* command, struct nvme_completion* compl)
{
DPRINTF(("%s async event request 0x%x\r\n", __func__, command->cdw11));
/*
* TODO: raise events when they happen based on the Set Features cmd.
* These events happen async, so only set completion successful if
* there is an event reflective of the request to get event.
*/
pci_nvme_status_tc(&compl->status, NVME_SCT_COMMAND_SPECIFIC,
NVME_SC_ASYNC_EVENT_REQUEST_LIMIT_EXCEEDED);
return (0);
}
static void
pci_nvme_handle_admin_cmd(struct pci_nvme_softc* sc, uint64_t value)
{
struct nvme_completion compl;
struct nvme_command *cmd;
struct nvme_submission_queue *sq;
struct nvme_completion_queue *cq;
int do_intr = 0;
uint16_t sqhead;
DPRINTF(("%s index %u\r\n", __func__, (uint32_t)value));
sq = &sc->submit_queues[0];
sqhead = atomic_load_acq_short(&sq->head);
if (atomic_testandset_int(&sq->busy, 1)) {
DPRINTF(("%s SQ busy, head %u, tail %u\r\n",
__func__, sqhead, sq->tail));
return;
}
DPRINTF(("sqhead %u, tail %u\r\n", sqhead, sq->tail));
while (sqhead != atomic_load_acq_short(&sq->tail)) {
cmd = &(sq->qbase)[sqhead];
compl.status = 0;
switch (NVME_CMD_GET_OPC(cmd->opc_fuse)) {
case NVME_OPC_DELETE_IO_SQ:
DPRINTF(("%s command DELETE_IO_SQ\r\n", __func__));
do_intr |= nvme_opc_delete_io_sq(sc, cmd, &compl);
break;
case NVME_OPC_CREATE_IO_SQ:
DPRINTF(("%s command CREATE_IO_SQ\r\n", __func__));
do_intr |= nvme_opc_create_io_sq(sc, cmd, &compl);
break;
case NVME_OPC_DELETE_IO_CQ:
DPRINTF(("%s command DELETE_IO_CQ\r\n", __func__));
do_intr |= nvme_opc_delete_io_cq(sc, cmd, &compl);
break;
case NVME_OPC_CREATE_IO_CQ:
DPRINTF(("%s command CREATE_IO_CQ\r\n", __func__));
do_intr |= nvme_opc_create_io_cq(sc, cmd, &compl);
break;
case NVME_OPC_GET_LOG_PAGE:
DPRINTF(("%s command GET_LOG_PAGE\r\n", __func__));
do_intr |= nvme_opc_get_log_page(sc, cmd, &compl);
break;
case NVME_OPC_IDENTIFY:
DPRINTF(("%s command IDENTIFY\r\n", __func__));
do_intr |= nvme_opc_identify(sc, cmd, &compl);
break;
case NVME_OPC_ABORT:
DPRINTF(("%s command ABORT\r\n", __func__));
do_intr |= nvme_opc_abort(sc, cmd, &compl);
break;
case NVME_OPC_SET_FEATURES:
DPRINTF(("%s command SET_FEATURES\r\n", __func__));
do_intr |= nvme_opc_set_features(sc, cmd, &compl);
break;
case NVME_OPC_GET_FEATURES:
DPRINTF(("%s command GET_FEATURES\r\n", __func__));
do_intr |= nvme_opc_get_features(sc, cmd, &compl);
break;
case NVME_OPC_ASYNC_EVENT_REQUEST:
DPRINTF(("%s command ASYNC_EVENT_REQ\r\n", __func__));
/* XXX dont care, unhandled for now
do_intr |= nvme_opc_async_event_req(sc, cmd, &compl);
*/
break;
default:
WPRINTF(("0x%x command is not implemented\r\n",
NVME_CMD_GET_OPC(cmd->opc_fuse)));
}
/* for now skip async event generation */
if (NVME_CMD_GET_OPC(cmd->opc_fuse) !=
NVME_OPC_ASYNC_EVENT_REQUEST) {
struct nvme_completion *cp;
int phase;
cq = &sc->compl_queues[0];
cp = &(cq->qbase)[cq->tail];
cp->sqid = 0;
cp->sqhd = sqhead;
cp->cid = cmd->cid;
phase = NVME_STATUS_GET_P(cp->status);
cp->status = compl.status;
pci_nvme_toggle_phase(&cp->status, phase);
cq->tail = (cq->tail + 1) % cq->size;
}
sqhead = (sqhead + 1) % sq->size;
}
DPRINTF(("setting sqhead %u\r\n", sqhead));
atomic_store_short(&sq->head, sqhead);
atomic_store_int(&sq->busy, 0);
if (do_intr)
pci_generate_msix(sc->nsc_pi, 0);
}
static int
pci_nvme_append_iov_req(struct pci_nvme_softc *sc, struct pci_nvme_ioreq *req,
uint64_t gpaddr, size_t size, int do_write, uint64_t lba)
{
int iovidx;
if (req != NULL) {
/* concatenate contig block-iovs to minimize number of iovs */
if ((req->prev_gpaddr + req->prev_size) == gpaddr) {
iovidx = req->io_req.br_iovcnt - 1;
req->io_req.br_iov[iovidx].iov_base =
paddr_guest2host(req->sc->nsc_pi->pi_vmctx,
req->prev_gpaddr, size);
req->prev_size += size;
req->io_req.br_resid += size;
req->io_req.br_iov[iovidx].iov_len = req->prev_size;
} else {
pthread_mutex_lock(&req->mtx);
iovidx = req->io_req.br_iovcnt;
if (iovidx == NVME_MAX_BLOCKIOVS) {
int err = 0;
DPRINTF(("large I/O, doing partial req\r\n"));
iovidx = 0;
req->io_req.br_iovcnt = 0;
req->io_req.br_callback = pci_nvme_io_partial;
if (!do_write)
err = blockif_read(sc->nvstore.ctx,
&req->io_req);
else
err = blockif_write(sc->nvstore.ctx,
&req->io_req);
/* wait until req completes before cont */
if (err == 0)
pthread_cond_wait(&req->cv, &req->mtx);
}
if (iovidx == 0) {
req->io_req.br_offset = lba;
req->io_req.br_resid = 0;
req->io_req.br_param = req;
}
req->io_req.br_iov[iovidx].iov_base =
paddr_guest2host(req->sc->nsc_pi->pi_vmctx,
gpaddr, size);
req->io_req.br_iov[iovidx].iov_len = size;
req->prev_gpaddr = gpaddr;
req->prev_size = size;
req->io_req.br_resid += size;
req->io_req.br_iovcnt++;
pthread_mutex_unlock(&req->mtx);
}
} else {
/* RAM buffer: read/write directly */
void *p = sc->nvstore.ctx;
void *gptr;
if ((lba + size) > sc->nvstore.size) {
WPRINTF(("%s write would overflow RAM\r\n", __func__));
return (-1);
}
p = (void *)((uintptr_t)p + (uintptr_t)lba);
gptr = paddr_guest2host(sc->nsc_pi->pi_vmctx, gpaddr, size);
if (do_write)
memcpy(p, gptr, size);
else
memcpy(gptr, p, size);
}
return (0);
}
static void
pci_nvme_set_completion(struct pci_nvme_softc *sc,
struct nvme_submission_queue *sq, int sqid, uint16_t cid,
uint32_t cdw0, uint16_t status, int ignore_busy)
{
struct nvme_completion_queue *cq = &sc->compl_queues[sq->cqid];
struct nvme_completion *compl;
int do_intr = 0;
int phase;
DPRINTF(("%s sqid %d cqid %u cid %u status: 0x%x 0x%x\r\n",
__func__, sqid, sq->cqid, cid, NVME_STATUS_GET_SCT(status),
NVME_STATUS_GET_SC(status)));
pthread_mutex_lock(&cq->mtx);
assert(cq->qbase != NULL);
compl = &cq->qbase[cq->tail];
compl->sqhd = atomic_load_acq_short(&sq->head);
compl->sqid = sqid;
compl->cid = cid;
// toggle phase
phase = NVME_STATUS_GET_P(compl->status);
compl->status = status;
pci_nvme_toggle_phase(&compl->status, phase);
cq->tail = (cq->tail + 1) % cq->size;
if (cq->intr_en & NVME_CQ_INTEN)
do_intr = 1;
pthread_mutex_unlock(&cq->mtx);
if (ignore_busy || !atomic_load_acq_int(&sq->busy))
if (do_intr)
pci_generate_msix(sc->nsc_pi, cq->intr_vec);
}
static void
pci_nvme_release_ioreq(struct pci_nvme_softc *sc, struct pci_nvme_ioreq *req)
{
req->sc = NULL;
req->nvme_sq = NULL;
req->sqid = 0;
pthread_mutex_lock(&sc->mtx);
req->next = sc->ioreqs_free;
sc->ioreqs_free = req;
sc->pending_ios--;
/* when no more IO pending, can set to ready if device reset/enabled */
if (sc->pending_ios == 0 &&
NVME_CC_GET_EN(sc->regs.cc) && !(NVME_CSTS_GET_RDY(sc->regs.csts)))
sc->regs.csts |= NVME_CSTS_RDY;
pthread_mutex_unlock(&sc->mtx);
sem_post(&sc->iosemlock);
}
static struct pci_nvme_ioreq *
pci_nvme_get_ioreq(struct pci_nvme_softc *sc)
{
struct pci_nvme_ioreq *req = NULL;;
sem_wait(&sc->iosemlock);
pthread_mutex_lock(&sc->mtx);
req = sc->ioreqs_free;
assert(req != NULL);
sc->ioreqs_free = req->next;
req->next = NULL;
req->sc = sc;
sc->pending_ios++;
pthread_mutex_unlock(&sc->mtx);
req->io_req.br_iovcnt = 0;
req->io_req.br_offset = 0;
req->io_req.br_resid = 0;
req->io_req.br_param = req;
req->prev_gpaddr = 0;
req->prev_size = 0;
return req;
}
static void
pci_nvme_io_done(struct blockif_req *br, int err)
{
struct pci_nvme_ioreq *req = br->br_param;
struct nvme_submission_queue *sq = req->nvme_sq;
uint16_t code, status;
DPRINTF(("%s error %d %s\r\n", __func__, err, strerror(err)));
/* TODO return correct error */
if (err)
code = NVME_SC_DATA_TRANSFER_ERROR;
else
code = NVME_SC_SUCCESS;
code = err ? NVME_SC_DATA_TRANSFER_ERROR : NVME_SC_SUCCESS;
pci_nvme_status_genc(&status, code);
pci_nvme_set_completion(req->sc, sq, req->sqid, req->cid, 0, status, 0);
pci_nvme_release_ioreq(req->sc, req);
}
static void
pci_nvme_io_partial(struct blockif_req *br, int err)
{
struct pci_nvme_ioreq *req = br->br_param;
DPRINTF(("%s error %d %s\r\n", __func__, err, strerror(err)));
pthread_cond_signal(&req->cv);
}
static void
pci_nvme_handle_io_cmd(struct pci_nvme_softc* sc, uint16_t idx)
{
struct nvme_submission_queue *sq;
uint16_t status;
uint16_t sqhead;
int err;
/* handle all submissions up to sq->tail index */
sq = &sc->submit_queues[idx];
if (atomic_testandset_int(&sq->busy, 1)) {
DPRINTF(("%s sqid %u busy\r\n", __func__, idx));
return;
}
sqhead = atomic_load_acq_short(&sq->head);
DPRINTF(("nvme_handle_io qid %u head %u tail %u cmdlist %p\r\n",
idx, sqhead, sq->tail, sq->qbase));
while (sqhead != atomic_load_acq_short(&sq->tail)) {
struct nvme_command *cmd;
struct pci_nvme_ioreq *req = NULL;
uint64_t lba;
uint64_t nblocks, bytes, size, cpsz;
/* TODO: support scatter gather list handling */
cmd = &sq->qbase[sqhead];
sqhead = (sqhead + 1) % sq->size;
lba = ((uint64_t)cmd->cdw11 << 32) | cmd->cdw10;
if (NVME_CMD_GET_OPC(cmd->opc_fuse) == NVME_OPC_FLUSH) {
pci_nvme_status_genc(&status, NVME_SC_SUCCESS);
pci_nvme_set_completion(sc, sq, idx, cmd->cid, 0,
status, 1);
continue;
} else if (NVME_CMD_GET_OPC(cmd->opc_fuse) == 0x08) {
/* TODO: write zeroes */
WPRINTF(("%s write zeroes lba 0x%lx blocks %u\r\n",
__func__, lba, cmd->cdw12 & 0xFFFF));
pci_nvme_status_genc(&status, NVME_SC_SUCCESS);
pci_nvme_set_completion(sc, sq, idx, cmd->cid, 0,
status, 1);
continue;
}
nblocks = (cmd->cdw12 & 0xFFFF) + 1;
bytes = nblocks * sc->nvstore.sectsz;
if (sc->nvstore.type == NVME_STOR_BLOCKIF) {
req = pci_nvme_get_ioreq(sc);
req->nvme_sq = sq;
req->sqid = idx;
}
/*
* If data starts mid-page and flows into the next page, then
* increase page count
*/
DPRINTF(("[h%u:t%u:n%u] %s starting LBA 0x%lx blocks %lu "
"(%lu-bytes)\r\n",
sqhead==0 ? sq->size-1 : sqhead-1, sq->tail, sq->size,
NVME_CMD_GET_OPC(cmd->opc_fuse) == NVME_OPC_WRITE ?
"WRITE" : "READ",
lba, nblocks, bytes));
cmd->prp1 &= ~(0x03UL);
cmd->prp2 &= ~(0x03UL);
DPRINTF((" prp1 0x%lx prp2 0x%lx\r\n", cmd->prp1, cmd->prp2));
size = bytes;
lba *= sc->nvstore.sectsz;
cpsz = PAGE_SIZE - (cmd->prp1 % PAGE_SIZE);
if (cpsz > bytes)
cpsz = bytes;
if (req != NULL) {
req->io_req.br_offset = ((uint64_t)cmd->cdw11 << 32) |
cmd->cdw10;
req->opc = NVME_CMD_GET_OPC(cmd->opc_fuse);
req->cid = cmd->cid;
req->nsid = cmd->nsid;
}
err = pci_nvme_append_iov_req(sc, req, cmd->prp1, cpsz,
NVME_CMD_GET_OPC(cmd->opc_fuse) == NVME_OPC_WRITE, lba);
lba += cpsz;
size -= cpsz;
if (size == 0)
goto iodone;
if (size <= PAGE_SIZE) {
/* prp2 is second (and final) page in transfer */
err = pci_nvme_append_iov_req(sc, req, cmd->prp2,
size,
NVME_CMD_GET_OPC(cmd->opc_fuse) == NVME_OPC_WRITE,
lba);
} else {
uint64_t *prp_list;
int i;
/* prp2 is pointer to a physical region page list */
prp_list = paddr_guest2host(sc->nsc_pi->pi_vmctx,
cmd->prp2, PAGE_SIZE);
i = 0;
while (size != 0) {
cpsz = MIN(size, PAGE_SIZE);
/*
* Move to linked physical region page list
* in last item.
*/
if (i == (NVME_PRP2_ITEMS-1) &&
size > PAGE_SIZE) {
assert((prp_list[i] & (PAGE_SIZE-1)) == 0);
prp_list = paddr_guest2host(
sc->nsc_pi->pi_vmctx,
prp_list[i], PAGE_SIZE);
i = 0;
}
if (prp_list[i] == 0) {
WPRINTF(("PRP2[%d] = 0 !!!\r\n", i));
err = 1;
break;
}
err = pci_nvme_append_iov_req(sc, req,
prp_list[i], cpsz,
NVME_CMD_GET_OPC(cmd->opc_fuse) ==
NVME_OPC_WRITE, lba);
if (err)
break;
lba += cpsz;
size -= cpsz;
i++;
}
}
iodone:
if (sc->nvstore.type == NVME_STOR_RAM) {
uint16_t code, status;
code = err ? NVME_SC_LBA_OUT_OF_RANGE :
NVME_SC_SUCCESS;
pci_nvme_status_genc(&status, code);
pci_nvme_set_completion(sc, sq, idx, cmd->cid, 0,
status, 1);
continue;
}
if (err)
goto do_error;
req->io_req.br_callback = pci_nvme_io_done;
err = 0;
switch (NVME_CMD_GET_OPC(cmd->opc_fuse)) {
case NVME_OPC_READ:
err = blockif_read(sc->nvstore.ctx, &req->io_req);
break;
case NVME_OPC_WRITE:
err = blockif_write(sc->nvstore.ctx, &req->io_req);
break;
default:
WPRINTF(("%s unhandled io command 0x%x\r\n",
__func__, NVME_CMD_GET_OPC(cmd->opc_fuse)));
err = 1;
}
do_error:
if (err) {
uint16_t status;
pci_nvme_status_genc(&status,
NVME_SC_DATA_TRANSFER_ERROR);
pci_nvme_set_completion(sc, sq, idx, cmd->cid, 0,
status, 1);
pci_nvme_release_ioreq(sc, req);
}
}
atomic_store_short(&sq->head, sqhead);
atomic_store_int(&sq->busy, 0);
}
static void
pci_nvme_handle_doorbell(struct vmctx *ctx, struct pci_nvme_softc* sc,
uint64_t idx, int is_sq, uint64_t value)
{
DPRINTF(("nvme doorbell %lu, %s, val 0x%lx\r\n",
idx, is_sq ? "SQ" : "CQ", value & 0xFFFF));
if (is_sq) {
atomic_store_short(&sc->submit_queues[idx].tail,
(uint16_t)value);
if (idx == 0) {
pci_nvme_handle_admin_cmd(sc, value);
} else {
/* submission queue; handle new entries in SQ */
if (idx > sc->num_squeues) {
WPRINTF(("%s SQ index %lu overflow from "
"guest (max %u)\r\n",
__func__, idx, sc->num_squeues));
return;
}
pci_nvme_handle_io_cmd(sc, (uint16_t)idx);
}
} else {
if (idx > sc->num_cqueues) {
WPRINTF(("%s queue index %lu overflow from "
"guest (max %u)\r\n",
__func__, idx, sc->num_cqueues));
return;
}
sc->compl_queues[idx].head = (uint16_t)value;
}
}
static void
pci_nvme_bar0_reg_dumps(const char *func, uint64_t offset, int iswrite)
{
const char *s = iswrite ? "WRITE" : "READ";
switch (offset) {
case NVME_CR_CAP_LOW:
DPRINTF(("%s %s NVME_CR_CAP_LOW\r\n", func, s));
break;
case NVME_CR_CAP_HI:
DPRINTF(("%s %s NVME_CR_CAP_HI\r\n", func, s));
break;
case NVME_CR_VS:
DPRINTF(("%s %s NVME_CR_VS\r\n", func, s));
break;
case NVME_CR_INTMS:
DPRINTF(("%s %s NVME_CR_INTMS\r\n", func, s));
break;
case NVME_CR_INTMC:
DPRINTF(("%s %s NVME_CR_INTMC\r\n", func, s));
break;
case NVME_CR_CC:
DPRINTF(("%s %s NVME_CR_CC\r\n", func, s));
break;
case NVME_CR_CSTS:
DPRINTF(("%s %s NVME_CR_CSTS\r\n", func, s));
break;
case NVME_CR_NSSR:
DPRINTF(("%s %s NVME_CR_NSSR\r\n", func, s));
break;
case NVME_CR_AQA:
DPRINTF(("%s %s NVME_CR_AQA\r\n", func, s));
break;
case NVME_CR_ASQ_LOW:
DPRINTF(("%s %s NVME_CR_ASQ_LOW\r\n", func, s));
break;
case NVME_CR_ASQ_HI:
DPRINTF(("%s %s NVME_CR_ASQ_HI\r\n", func, s));
break;
case NVME_CR_ACQ_LOW:
DPRINTF(("%s %s NVME_CR_ACQ_LOW\r\n", func, s));
break;
case NVME_CR_ACQ_HI:
DPRINTF(("%s %s NVME_CR_ACQ_HI\r\n", func, s));
break;
default:
DPRINTF(("unknown nvme bar-0 offset 0x%lx\r\n", offset));
}
}
static void
pci_nvme_write_bar_0(struct vmctx *ctx, struct pci_nvme_softc* sc,
uint64_t offset, int size, uint64_t value)
{
uint32_t ccreg;
if (offset >= NVME_DOORBELL_OFFSET) {
uint64_t belloffset = offset - NVME_DOORBELL_OFFSET;
uint64_t idx = belloffset / 8; /* door bell size = 2*int */
int is_sq = (belloffset % 8) < 4;
if (belloffset > ((sc->max_queues+1) * 8 - 4)) {
WPRINTF(("guest attempted an overflow write offset "
"0x%lx, val 0x%lx in %s",
offset, value, __func__));
return;
}
pci_nvme_handle_doorbell(ctx, sc, idx, is_sq, value);
return;
}
DPRINTF(("nvme-write offset 0x%lx, size %d, value 0x%lx\r\n",
offset, size, value));
if (size != 4) {
WPRINTF(("guest wrote invalid size %d (offset 0x%lx, "
"val 0x%lx) to bar0 in %s",
size, offset, value, __func__));
/* TODO: shutdown device */
return;
}
pci_nvme_bar0_reg_dumps(__func__, offset, 1);
pthread_mutex_lock(&sc->mtx);
switch (offset) {
case NVME_CR_CAP_LOW:
case NVME_CR_CAP_HI:
/* readonly */
break;
case NVME_CR_VS:
/* readonly */
break;
case NVME_CR_INTMS:
/* MSI-X, so ignore */
break;
case NVME_CR_INTMC:
/* MSI-X, so ignore */
break;
case NVME_CR_CC:
ccreg = (uint32_t)value;
DPRINTF(("%s NVME_CR_CC en %x css %x shn %x iosqes %u "
"iocqes %u\r\n",
__func__,
NVME_CC_GET_EN(ccreg), NVME_CC_GET_CSS(ccreg),
NVME_CC_GET_SHN(ccreg), NVME_CC_GET_IOSQES(ccreg),
NVME_CC_GET_IOCQES(ccreg)));
if (NVME_CC_GET_SHN(ccreg)) {
/* perform shutdown - flush out data to backend */
sc->regs.csts &= ~(NVME_CSTS_REG_SHST_MASK <<
NVME_CSTS_REG_SHST_SHIFT);
sc->regs.csts |= NVME_SHST_COMPLETE <<
NVME_CSTS_REG_SHST_SHIFT;
}
if (NVME_CC_GET_EN(ccreg) != NVME_CC_GET_EN(sc->regs.cc)) {
if (NVME_CC_GET_EN(ccreg) == 0)
/* transition 1-> causes controller reset */
pci_nvme_reset(sc);
else
pci_nvme_init_controller(ctx, sc);
}
/* Insert the iocqes, iosqes and en bits from the write */
sc->regs.cc &= ~NVME_CC_WRITE_MASK;
sc->regs.cc |= ccreg & NVME_CC_WRITE_MASK;
if (NVME_CC_GET_EN(ccreg) == 0) {
/* Insert the ams, mps and css bit fields */
sc->regs.cc &= ~NVME_CC_NEN_WRITE_MASK;
sc->regs.cc |= ccreg & NVME_CC_NEN_WRITE_MASK;
sc->regs.csts &= ~NVME_CSTS_RDY;
} else if (sc->pending_ios == 0) {
sc->regs.csts |= NVME_CSTS_RDY;
}
break;
case NVME_CR_CSTS:
break;
case NVME_CR_NSSR:
/* ignore writes; don't support subsystem reset */
break;
case NVME_CR_AQA:
sc->regs.aqa = (uint32_t)value;
break;
case NVME_CR_ASQ_LOW:
sc->regs.asq = (sc->regs.asq & (0xFFFFFFFF00000000)) |
(0xFFFFF000 & value);
break;
case NVME_CR_ASQ_HI:
sc->regs.asq = (sc->regs.asq & (0x00000000FFFFFFFF)) |
(value << 32);
break;
case NVME_CR_ACQ_LOW:
sc->regs.acq = (sc->regs.acq & (0xFFFFFFFF00000000)) |
(0xFFFFF000 & value);
break;
case NVME_CR_ACQ_HI:
sc->regs.acq = (sc->regs.acq & (0x00000000FFFFFFFF)) |
(value << 32);
break;
default:
DPRINTF(("%s unknown offset 0x%lx, value 0x%lx size %d\r\n",
__func__, offset, value, size));
}
pthread_mutex_unlock(&sc->mtx);
}
static void
pci_nvme_write(struct vmctx *ctx, int vcpu, struct pci_devinst *pi,
int baridx, uint64_t offset, int size, uint64_t value)
{
struct pci_nvme_softc* sc = pi->pi_arg;
if (baridx == pci_msix_table_bar(pi) ||
baridx == pci_msix_pba_bar(pi)) {
DPRINTF(("nvme-write baridx %d, msix: off 0x%lx, size %d, "
" value 0x%lx\r\n", baridx, offset, size, value));
pci_emul_msix_twrite(pi, offset, size, value);
return;
}
switch (baridx) {
case 0:
pci_nvme_write_bar_0(ctx, sc, offset, size, value);
break;
default:
DPRINTF(("%s unknown baridx %d, val 0x%lx\r\n",
__func__, baridx, value));
}
}
static uint64_t pci_nvme_read_bar_0(struct pci_nvme_softc* sc,
uint64_t offset, int size)
{
uint64_t value;
pci_nvme_bar0_reg_dumps(__func__, offset, 0);
if (offset < NVME_DOORBELL_OFFSET) {
void *p = &(sc->regs);
pthread_mutex_lock(&sc->mtx);
memcpy(&value, (void *)((uintptr_t)p + offset), size);
pthread_mutex_unlock(&sc->mtx);
} else {
value = 0;
WPRINTF(("pci_nvme: read invalid offset %ld\r\n", offset));
}
switch (size) {
case 1:
value &= 0xFF;
break;
case 2:
value &= 0xFFFF;
break;
case 4:
value &= 0xFFFFFFFF;
break;
}
DPRINTF((" nvme-read offset 0x%lx, size %d -> value 0x%x\r\n",
offset, size, (uint32_t)value));
return (value);
}
static uint64_t
pci_nvme_read(struct vmctx *ctx, int vcpu, struct pci_devinst *pi, int baridx,
uint64_t offset, int size)
{
struct pci_nvme_softc* sc = pi->pi_arg;
if (baridx == pci_msix_table_bar(pi) ||
baridx == pci_msix_pba_bar(pi)) {
DPRINTF(("nvme-read bar: %d, msix: regoff 0x%lx, size %d\r\n",
baridx, offset, size));
return pci_emul_msix_tread(pi, offset, size);
}
switch (baridx) {
case 0:
return pci_nvme_read_bar_0(sc, offset, size);
default:
DPRINTF(("unknown bar %d, 0x%lx\r\n", baridx, offset));
}
return (0);
}
static int
pci_nvme_parse_opts(struct pci_nvme_softc *sc, char *opts)
{
char bident[sizeof("XX:X:X")];
char *uopt, *xopts, *config;
uint32_t sectsz;
int optidx;
sc->max_queues = NVME_QUEUES;
sc->max_qentries = NVME_MAX_QENTRIES;
sc->ioslots = NVME_IOSLOTS;
sc->num_squeues = sc->max_queues;
sc->num_cqueues = sc->max_queues;
sectsz = 0;
uopt = strdup(opts);
optidx = 0;
snprintf(sc->ctrldata.sn, sizeof(sc->ctrldata.sn),
"NVME-%d-%d", sc->nsc_pi->pi_slot, sc->nsc_pi->pi_func);
for (xopts = strtok(uopt, ",");
xopts != NULL;
xopts = strtok(NULL, ",")) {
if ((config = strchr(xopts, '=')) != NULL)
*config++ = '\0';
if (!strcmp("maxq", xopts)) {
sc->max_queues = atoi(config);
} else if (!strcmp("qsz", xopts)) {
sc->max_qentries = atoi(config);
} else if (!strcmp("ioslots", xopts)) {
sc->ioslots = atoi(config);
} else if (!strcmp("sectsz", xopts)) {
sectsz = atoi(config);
} else if (!strcmp("ser", xopts)) {
memset(sc->ctrldata.sn, 0, sizeof(sc->ctrldata.sn));
strncpy(sc->ctrldata.sn, config,
sizeof(sc->ctrldata.sn));
} else if (!strcmp("ram", xopts)) {
uint64_t sz = strtoull(&xopts[4], NULL, 10);
sc->nvstore.type = NVME_STOR_RAM;
sc->nvstore.size = sz * 1024 * 1024;
sc->nvstore.ctx = calloc(1, sc->nvstore.size);
sc->nvstore.sectsz = 4096;
sc->nvstore.sectsz_bits = 12;
if (sc->nvstore.ctx == NULL) {
perror("Unable to allocate RAM");
return (-1);
}
} else if (optidx == 0) {
snprintf(bident, sizeof(bident), "%d:%d",
sc->nsc_pi->pi_slot, sc->nsc_pi->pi_func);
sc->nvstore.ctx = blockif_open(xopts, bident);
if (sc->nvstore.ctx == NULL) {
perror("Could not open backing file");
return (-1);
}
sc->nvstore.type = NVME_STOR_BLOCKIF;
sc->nvstore.size = blockif_size(sc->nvstore.ctx);
} else {
fprintf(stderr, "Invalid option %s\n", xopts);
return (-1);
}
optidx++;
}
if (sc->nvstore.ctx == NULL || sc->nvstore.size == 0) {
fprintf(stderr, "backing store not specified\n");
return (-1);
}
if (sectsz == 512 || sectsz == 4096 || sectsz == 8192)
sc->nvstore.sectsz = sectsz;
else if (sc->nvstore.type != NVME_STOR_RAM)
sc->nvstore.sectsz = blockif_sectsz(sc->nvstore.ctx);
for (sc->nvstore.sectsz_bits = 9;
(1 << sc->nvstore.sectsz_bits) < sc->nvstore.sectsz;
sc->nvstore.sectsz_bits++)
;
if (sc->max_queues == 0) {
fprintf(stderr, "Invalid maxq option\n");
return (-1);
}
if (sc->max_qentries <= 0) {
fprintf(stderr, "Invalid qsz option\n");
return (-1);
}
if (sc->ioslots <= 0) {
fprintf(stderr, "Invalid ioslots option\n");
return (-1);
}
return (0);
}
static int
pci_nvme_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
{
struct pci_nvme_softc *sc;
uint32_t pci_membar_sz;
int error;
error = 0;
sc = calloc(1, sizeof(struct pci_nvme_softc));
pi->pi_arg = sc;
sc->nsc_pi = pi;
error = pci_nvme_parse_opts(sc, opts);
if (error < 0)
goto done;
else
error = 0;
sc->ioreqs = calloc(sc->ioslots, sizeof(struct pci_nvme_ioreq));
for (int i = 0; i < sc->ioslots; i++) {
if (i < (sc->ioslots-1))
sc->ioreqs[i].next = &sc->ioreqs[i+1];
pthread_mutex_init(&sc->ioreqs[i].mtx, NULL);
pthread_cond_init(&sc->ioreqs[i].cv, NULL);
}
sc->ioreqs_free = sc->ioreqs;
sc->intr_coales_aggr_thresh = 1;
pci_set_cfgdata16(pi, PCIR_DEVICE, 0x0A0A);
pci_set_cfgdata16(pi, PCIR_VENDOR, 0xFB5D);
pci_set_cfgdata8(pi, PCIR_CLASS, PCIC_STORAGE);
pci_set_cfgdata8(pi, PCIR_SUBCLASS, PCIS_STORAGE_NVM);
pci_set_cfgdata8(pi, PCIR_PROGIF,
PCIP_STORAGE_NVM_ENTERPRISE_NVMHCI_1_0);
/* allocate size of nvme registers + doorbell space for all queues */
pci_membar_sz = sizeof(struct nvme_registers) +
2*sizeof(uint32_t)*(sc->max_queues);
DPRINTF(("nvme membar size: %u\r\n", pci_membar_sz));
error = pci_emul_alloc_bar(pi, 0, PCIBAR_MEM64, pci_membar_sz);
if (error) {
WPRINTF(("%s pci alloc mem bar failed\r\n", __func__));
goto done;
}
error = pci_emul_add_msixcap(pi, sc->max_queues, NVME_MSIX_BAR);
if (error) {
WPRINTF(("%s pci add msixcap failed\r\n", __func__));
goto done;
}
pthread_mutex_init(&sc->mtx, NULL);
sem_init(&sc->iosemlock, 0, sc->ioslots);
pci_nvme_reset(sc);
pci_nvme_init_ctrldata(sc);
pci_nvme_init_nsdata(sc);
pci_lintr_request(pi);
done:
return (error);
}
struct pci_devemu pci_de_nvme = {
.pe_emu = "nvme",
.pe_init = pci_nvme_init,
.pe_barwrite = pci_nvme_write,
.pe_barread = pci_nvme_read
};
PCI_EMUL_SET(pci_de_nvme);
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