diff options
Diffstat (limited to 'hw/nvme/dif.c')
| -rw-r--r-- | hw/nvme/dif.c | 300 |
1 files changed, 251 insertions, 49 deletions
diff --git a/hw/nvme/dif.c b/hw/nvme/dif.c index 5dbd18b2a4..62d885f83e 100644 --- a/hw/nvme/dif.c +++ b/hw/nvme/dif.c @@ -13,13 +13,16 @@ #include "sysemu/block-backend.h" #include "nvme.h" +#include "dif.h" #include "trace.h" uint16_t nvme_check_prinfo(NvmeNamespace *ns, uint8_t prinfo, uint64_t slba, - uint32_t reftag) + uint64_t reftag) { + uint64_t mask = ns->pif ? 0xffffffffffff : 0xffffffff; + if ((NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) == NVME_ID_NS_DPS_TYPE_1) && - (prinfo & NVME_PRINFO_PRCHK_REF) && (slba & 0xffffffff) != reftag) { + (prinfo & NVME_PRINFO_PRCHK_REF) && (slba & mask) != reftag) { return NVME_INVALID_PROT_INFO | NVME_DNR; } @@ -27,43 +30,58 @@ uint16_t nvme_check_prinfo(NvmeNamespace *ns, uint8_t prinfo, uint64_t slba, } /* from Linux kernel (crypto/crct10dif_common.c) */ -static uint16_t crc_t10dif(uint16_t crc, const unsigned char *buffer, - size_t len) +static uint16_t crc16_t10dif(uint16_t crc, const unsigned char *buffer, + size_t len) { unsigned int i; for (i = 0; i < len; i++) { - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; + crc = (crc << 8) ^ crc16_t10dif_table[((crc >> 8) ^ buffer[i]) & 0xff]; } return crc; } -void nvme_dif_pract_generate_dif(NvmeNamespace *ns, uint8_t *buf, size_t len, - uint8_t *mbuf, size_t mlen, uint16_t apptag, - uint32_t *reftag) +/* from Linux kernel (lib/crc64.c) */ +static uint64_t crc64_nvme(uint64_t crc, const unsigned char *buffer, + size_t len) +{ + size_t i; + + for (i = 0; i < len; i++) { + crc = (crc >> 8) ^ crc64_nvme_table[(crc & 0xff) ^ buffer[i]]; + } + + return crc ^ (uint64_t)~0; +} + +static void nvme_dif_pract_generate_dif_crc16(NvmeNamespace *ns, uint8_t *buf, + size_t len, uint8_t *mbuf, + size_t mlen, uint16_t apptag, + uint64_t *reftag) { uint8_t *end = buf + len; int16_t pil = 0; if (!(ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT)) { - pil = ns->lbaf.ms - sizeof(NvmeDifTuple); + pil = ns->lbaf.ms - nvme_pi_tuple_size(ns); } - trace_pci_nvme_dif_pract_generate_dif(len, ns->lbasz, ns->lbasz + pil, - apptag, *reftag); + trace_pci_nvme_dif_pract_generate_dif_crc16(len, ns->lbasz, + ns->lbasz + pil, apptag, + *reftag); for (; buf < end; buf += ns->lbasz, mbuf += ns->lbaf.ms) { NvmeDifTuple *dif = (NvmeDifTuple *)(mbuf + pil); - uint16_t crc = crc_t10dif(0x0, buf, ns->lbasz); + uint16_t crc = crc16_t10dif(0x0, buf, ns->lbasz); if (pil) { - crc = crc_t10dif(crc, mbuf, pil); + crc = crc16_t10dif(crc, mbuf, pil); } - dif->guard = cpu_to_be16(crc); - dif->apptag = cpu_to_be16(apptag); - dif->reftag = cpu_to_be32(*reftag); + dif->g16.guard = cpu_to_be16(crc); + dif->g16.apptag = cpu_to_be16(apptag); + dif->g16.reftag = cpu_to_be32(*reftag); if (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) != NVME_ID_NS_DPS_TYPE_3) { (*reftag)++; @@ -71,57 +89,114 @@ void nvme_dif_pract_generate_dif(NvmeNamespace *ns, uint8_t *buf, size_t len, } } -static uint16_t nvme_dif_prchk(NvmeNamespace *ns, NvmeDifTuple *dif, - uint8_t *buf, uint8_t *mbuf, size_t pil, - uint8_t prinfo, uint16_t apptag, - uint16_t appmask, uint32_t reftag) +static void nvme_dif_pract_generate_dif_crc64(NvmeNamespace *ns, uint8_t *buf, + size_t len, uint8_t *mbuf, + size_t mlen, uint16_t apptag, + uint64_t *reftag) +{ + uint8_t *end = buf + len; + int16_t pil = 0; + + if (!(ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT)) { + pil = ns->lbaf.ms - 16; + } + + trace_pci_nvme_dif_pract_generate_dif_crc64(len, ns->lbasz, + ns->lbasz + pil, apptag, + *reftag); + + for (; buf < end; buf += ns->lbasz, mbuf += ns->lbaf.ms) { + NvmeDifTuple *dif = (NvmeDifTuple *)(mbuf + pil); + uint64_t crc = crc64_nvme(~0ULL, buf, ns->lbasz); + + if (pil) { + crc = crc64_nvme(crc, mbuf, pil); + } + + dif->g64.guard = cpu_to_be64(crc); + dif->g64.apptag = cpu_to_be16(apptag); + + dif->g64.sr[0] = *reftag >> 40; + dif->g64.sr[1] = *reftag >> 32; + dif->g64.sr[2] = *reftag >> 24; + dif->g64.sr[3] = *reftag >> 16; + dif->g64.sr[4] = *reftag >> 8; + dif->g64.sr[5] = *reftag; + + if (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) != NVME_ID_NS_DPS_TYPE_3) { + (*reftag)++; + } + } +} + +void nvme_dif_pract_generate_dif(NvmeNamespace *ns, uint8_t *buf, size_t len, + uint8_t *mbuf, size_t mlen, uint16_t apptag, + uint64_t *reftag) +{ + switch (ns->pif) { + case NVME_PI_GUARD_16: + return nvme_dif_pract_generate_dif_crc16(ns, buf, len, mbuf, mlen, + apptag, reftag); + case NVME_PI_GUARD_64: + return nvme_dif_pract_generate_dif_crc64(ns, buf, len, mbuf, mlen, + apptag, reftag); + } + + abort(); +} + +static uint16_t nvme_dif_prchk_crc16(NvmeNamespace *ns, NvmeDifTuple *dif, + uint8_t *buf, uint8_t *mbuf, size_t pil, + uint8_t prinfo, uint16_t apptag, + uint16_t appmask, uint64_t reftag) { switch (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps)) { case NVME_ID_NS_DPS_TYPE_3: - if (be32_to_cpu(dif->reftag) != 0xffffffff) { + if (be32_to_cpu(dif->g16.reftag) != 0xffffffff) { break; } /* fallthrough */ case NVME_ID_NS_DPS_TYPE_1: case NVME_ID_NS_DPS_TYPE_2: - if (be16_to_cpu(dif->apptag) != 0xffff) { + if (be16_to_cpu(dif->g16.apptag) != 0xffff) { break; } - trace_pci_nvme_dif_prchk_disabled(be16_to_cpu(dif->apptag), - be32_to_cpu(dif->reftag)); + trace_pci_nvme_dif_prchk_disabled_crc16(be16_to_cpu(dif->g16.apptag), + be32_to_cpu(dif->g16.reftag)); return NVME_SUCCESS; } if (prinfo & NVME_PRINFO_PRCHK_GUARD) { - uint16_t crc = crc_t10dif(0x0, buf, ns->lbasz); + uint16_t crc = crc16_t10dif(0x0, buf, ns->lbasz); if (pil) { - crc = crc_t10dif(crc, mbuf, pil); + crc = crc16_t10dif(crc, mbuf, pil); } - trace_pci_nvme_dif_prchk_guard(be16_to_cpu(dif->guard), crc); + trace_pci_nvme_dif_prchk_guard_crc16(be16_to_cpu(dif->g16.guard), crc); - if (be16_to_cpu(dif->guard) != crc) { + if (be16_to_cpu(dif->g16.guard) != crc) { return NVME_E2E_GUARD_ERROR; } } if (prinfo & NVME_PRINFO_PRCHK_APP) { - trace_pci_nvme_dif_prchk_apptag(be16_to_cpu(dif->apptag), apptag, + trace_pci_nvme_dif_prchk_apptag(be16_to_cpu(dif->g16.apptag), apptag, appmask); - if ((be16_to_cpu(dif->apptag) & appmask) != (apptag & appmask)) { + if ((be16_to_cpu(dif->g16.apptag) & appmask) != (apptag & appmask)) { return NVME_E2E_APP_ERROR; } } if (prinfo & NVME_PRINFO_PRCHK_REF) { - trace_pci_nvme_dif_prchk_reftag(be32_to_cpu(dif->reftag), reftag); + trace_pci_nvme_dif_prchk_reftag_crc16(be32_to_cpu(dif->g16.reftag), + reftag); - if (be32_to_cpu(dif->reftag) != reftag) { + if (be32_to_cpu(dif->g16.reftag) != reftag) { return NVME_E2E_REF_ERROR; } } @@ -129,12 +204,96 @@ static uint16_t nvme_dif_prchk(NvmeNamespace *ns, NvmeDifTuple *dif, return NVME_SUCCESS; } +static uint16_t nvme_dif_prchk_crc64(NvmeNamespace *ns, NvmeDifTuple *dif, + uint8_t *buf, uint8_t *mbuf, size_t pil, + uint8_t prinfo, uint16_t apptag, + uint16_t appmask, uint64_t reftag) +{ + uint64_t r = 0; + + r |= (uint64_t)dif->g64.sr[0] << 40; + r |= (uint64_t)dif->g64.sr[1] << 32; + r |= (uint64_t)dif->g64.sr[2] << 24; + r |= (uint64_t)dif->g64.sr[3] << 16; + r |= (uint64_t)dif->g64.sr[4] << 8; + r |= (uint64_t)dif->g64.sr[5]; + + switch (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps)) { + case NVME_ID_NS_DPS_TYPE_3: + if (r != 0xffffffffffff) { + break; + } + + /* fallthrough */ + case NVME_ID_NS_DPS_TYPE_1: + case NVME_ID_NS_DPS_TYPE_2: + if (be16_to_cpu(dif->g64.apptag) != 0xffff) { + break; + } + + trace_pci_nvme_dif_prchk_disabled_crc64(be16_to_cpu(dif->g16.apptag), + r); + + return NVME_SUCCESS; + } + + if (prinfo & NVME_PRINFO_PRCHK_GUARD) { + uint64_t crc = crc64_nvme(~0ULL, buf, ns->lbasz); + + if (pil) { + crc = crc64_nvme(crc, mbuf, pil); + } + + trace_pci_nvme_dif_prchk_guard_crc64(be64_to_cpu(dif->g64.guard), crc); + + if (be64_to_cpu(dif->g64.guard) != crc) { + return NVME_E2E_GUARD_ERROR; + } + } + + if (prinfo & NVME_PRINFO_PRCHK_APP) { + trace_pci_nvme_dif_prchk_apptag(be16_to_cpu(dif->g64.apptag), apptag, + appmask); + + if ((be16_to_cpu(dif->g64.apptag) & appmask) != (apptag & appmask)) { + return NVME_E2E_APP_ERROR; + } + } + + if (prinfo & NVME_PRINFO_PRCHK_REF) { + trace_pci_nvme_dif_prchk_reftag_crc64(r, reftag); + + if (r != reftag) { + return NVME_E2E_REF_ERROR; + } + } + + return NVME_SUCCESS; +} + +static uint16_t nvme_dif_prchk(NvmeNamespace *ns, NvmeDifTuple *dif, + uint8_t *buf, uint8_t *mbuf, size_t pil, + uint8_t prinfo, uint16_t apptag, + uint16_t appmask, uint64_t reftag) +{ + switch (ns->pif) { + case NVME_PI_GUARD_16: + return nvme_dif_prchk_crc16(ns, dif, buf, mbuf, pil, prinfo, apptag, + appmask, reftag); + case NVME_PI_GUARD_64: + return nvme_dif_prchk_crc64(ns, dif, buf, mbuf, pil, prinfo, apptag, + appmask, reftag); + } + + abort(); +} + uint16_t nvme_dif_check(NvmeNamespace *ns, uint8_t *buf, size_t len, uint8_t *mbuf, size_t mlen, uint8_t prinfo, uint64_t slba, uint16_t apptag, - uint16_t appmask, uint32_t *reftag) + uint16_t appmask, uint64_t *reftag) { - uint8_t *end = buf + len; + uint8_t *bufp, *end = buf + len; int16_t pil = 0; uint16_t status; @@ -144,18 +303,34 @@ uint16_t nvme_dif_check(NvmeNamespace *ns, uint8_t *buf, size_t len, } if (!(ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT)) { - pil = ns->lbaf.ms - sizeof(NvmeDifTuple); + pil = ns->lbaf.ms - nvme_pi_tuple_size(ns); } trace_pci_nvme_dif_check(prinfo, ns->lbasz + pil); - for (; buf < end; buf += ns->lbasz, mbuf += ns->lbaf.ms) { + for (bufp = buf; bufp < end; bufp += ns->lbasz, mbuf += ns->lbaf.ms) { NvmeDifTuple *dif = (NvmeDifTuple *)(mbuf + pil); - - status = nvme_dif_prchk(ns, dif, buf, mbuf, pil, prinfo, apptag, + status = nvme_dif_prchk(ns, dif, bufp, mbuf, pil, prinfo, apptag, appmask, *reftag); if (status) { - return status; + /* + * The first block of a 'raw' image is always allocated, so we + * cannot reliably know if the block is all zeroes or not. For + * CRC16 this works fine because the T10 CRC16 is 0x0 for all + * zeroes, but the Rocksoft CRC64 is not. Thus, if a guard error is + * detected for the first block, check if it is zeroed and manually + * set the protection information to all ones to disable protection + * information checking. + */ + if (status == NVME_E2E_GUARD_ERROR && slba == 0x0 && bufp == buf) { + g_autofree uint8_t *zeroes = g_malloc0(ns->lbasz); + + if (memcmp(bufp, zeroes, ns->lbasz) == 0) { + memset(mbuf + pil, 0xff, nvme_pi_tuple_size(ns)); + } + } else { + return status; + } } if (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps) != NVME_ID_NS_DPS_TYPE_3) { @@ -183,7 +358,7 @@ uint16_t nvme_dif_mangle_mdata(NvmeNamespace *ns, uint8_t *mbuf, size_t mlen, if (!(ns->id_ns.dps & NVME_ID_NS_DPS_FIRST_EIGHT)) { - pil = ns->lbaf.ms - sizeof(NvmeDifTuple); + pil = ns->lbaf.ms - nvme_pi_tuple_size(ns); } do { @@ -209,7 +384,7 @@ uint16_t nvme_dif_mangle_mdata(NvmeNamespace *ns, uint8_t *mbuf, size_t mlen, end = mbufp + mlen; for (; mbufp < end; mbufp += ns->lbaf.ms) { - memset(mbufp + pil, 0xff, sizeof(NvmeDifTuple)); + memset(mbufp + pil, 0xff, nvme_pi_tuple_size(ns)); } } @@ -251,9 +426,12 @@ static void nvme_dif_rw_check_cb(void *opaque, int ret) uint8_t prinfo = NVME_RW_PRINFO(le16_to_cpu(rw->control)); uint16_t apptag = le16_to_cpu(rw->apptag); uint16_t appmask = le16_to_cpu(rw->appmask); - uint32_t reftag = le32_to_cpu(rw->reftag); + uint64_t reftag = le32_to_cpu(rw->reftag); + uint64_t cdw3 = le32_to_cpu(rw->cdw3); uint16_t status; + reftag |= cdw3 << 32; + trace_pci_nvme_dif_rw_check_cb(nvme_cid(req), prinfo, apptag, appmask, reftag); @@ -283,7 +461,7 @@ static void nvme_dif_rw_check_cb(void *opaque, int ret) goto out; } - if (prinfo & NVME_PRINFO_PRACT && ns->lbaf.ms == 8) { + if (prinfo & NVME_PRINFO_PRACT && ns->lbaf.ms == nvme_pi_tuple_size(ns)) { goto out; } @@ -367,11 +545,14 @@ uint16_t nvme_dif_rw(NvmeCtrl *n, NvmeRequest *req) uint8_t prinfo = NVME_RW_PRINFO(le16_to_cpu(rw->control)); uint16_t apptag = le16_to_cpu(rw->apptag); uint16_t appmask = le16_to_cpu(rw->appmask); - uint32_t reftag = le32_to_cpu(rw->reftag); + uint64_t reftag = le32_to_cpu(rw->reftag); + uint64_t cdw3 = le32_to_cpu(rw->cdw3); bool pract = !!(prinfo & NVME_PRINFO_PRACT); NvmeBounceContext *ctx; uint16_t status; + reftag |= cdw3 << 32; + trace_pci_nvme_dif_rw(pract, prinfo); ctx = g_new0(NvmeBounceContext, 1); @@ -387,7 +568,7 @@ uint16_t nvme_dif_rw(NvmeCtrl *n, NvmeRequest *req) if (pract) { uint8_t *mbuf, *end; - int16_t pil = ns->lbaf.ms - sizeof(NvmeDifTuple); + int16_t pil = ns->lbaf.ms - nvme_pi_tuple_size(ns); status = nvme_check_prinfo(ns, prinfo, slba, reftag); if (status) { @@ -411,8 +592,29 @@ uint16_t nvme_dif_rw(NvmeCtrl *n, NvmeRequest *req) for (; mbuf < end; mbuf += ns->lbaf.ms) { NvmeDifTuple *dif = (NvmeDifTuple *)(mbuf + pil); - dif->apptag = cpu_to_be16(apptag); - dif->reftag = cpu_to_be32(reftag); + switch (ns->pif) { + case NVME_PI_GUARD_16: + dif->g16.apptag = cpu_to_be16(apptag); + dif->g16.reftag = cpu_to_be32(reftag); + + break; + + case NVME_PI_GUARD_64: + dif->g64.guard = cpu_to_be64(0x6482d367eb22b64e); + dif->g64.apptag = cpu_to_be16(apptag); + + dif->g64.sr[0] = reftag >> 40; + dif->g64.sr[1] = reftag >> 32; + dif->g64.sr[2] = reftag >> 24; + dif->g64.sr[3] = reftag >> 16; + dif->g64.sr[4] = reftag >> 8; + dif->g64.sr[5] = reftag; + + break; + + default: + abort(); + } switch (NVME_ID_NS_DPS_TYPE(ns->id_ns.dps)) { case NVME_ID_NS_DPS_TYPE_1: @@ -427,7 +629,7 @@ uint16_t nvme_dif_rw(NvmeCtrl *n, NvmeRequest *req) return NVME_NO_COMPLETE; } - if (nvme_ns_ext(ns) && !(pract && ns->lbaf.ms == 8)) { + if (nvme_ns_ext(ns) && !(pract && ns->lbaf.ms == nvme_pi_tuple_size(ns))) { mapped_len += mlen; } @@ -461,7 +663,7 @@ uint16_t nvme_dif_rw(NvmeCtrl *n, NvmeRequest *req) qemu_iovec_init(&ctx->mdata.iov, 1); qemu_iovec_add(&ctx->mdata.iov, ctx->mdata.bounce, mlen); - if (!(pract && ns->lbaf.ms == 8)) { + if (!(pract && ns->lbaf.ms == nvme_pi_tuple_size(ns))) { status = nvme_bounce_mdata(n, ctx->mdata.bounce, ctx->mdata.iov.size, NVME_TX_DIRECTION_TO_DEVICE, req); if (status) { |