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18 Oct 2020 19:03:22 -0700 IronPort-SDR: 5uS793SbGhehkBZVYXnBpf5l/oQrJhdI3MSJkvI4+ZedfZuowlAYU7P4oCdgA+f+PtCLU/YMXt 3h+3Bh0pPHnTIR7kW3HbdFVgbYBq5x5ffZeWwlseOE349ci+l7cVDvQTrKRCPGDHpyUE5pIpN+ kSC0vz90edamH/GN8MwMmnbkcWWTRe+Qzrd5hnT2rlvJJNs0LutwT93RhsEuuY68/Reus6G+fR Ln1oCiYlGTmsC8WQgzGmj7+w93xOoZQCGuWzy0GCq4M9XDvyVya9h8LcKnps0lelkqfm0duGlr B0Q= WDCIronportException: Internal Received: from unknown (HELO redsun50.ssa.fujisawa.hgst.com) ([10.149.66.24]) by uls-op-cesaip02.wdc.com with ESMTP; 18 Oct 2020 19:17:44 -0700 From: Dmitry Fomichev To: Keith Busch , Klaus Jensen , Kevin Wolf , =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= , Maxim Levitsky , Fam Zheng Subject: [PATCH v7 06/11] hw/block/nvme: Introduce max active and open zone limits Date: Mon, 19 Oct 2020 11:17:21 +0900 Message-Id: <20201019021726.12048-7-dmitry.fomichev@wdc.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20201019021726.12048-1-dmitry.fomichev@wdc.com> References: <20201019021726.12048-1-dmitry.fomichev@wdc.com> MIME-Version: 1.0 Received-SPF: pass client-ip=216.71.154.42; envelope-from=prvs=5541069a6=dmitry.fomichev@wdc.com; helo=esa4.hgst.iphmx.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/10/18 22:17:33 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+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Add two module properties, "max_active" and "max_open" to control the maximum number of zones that can be active or open. Once these variables are set to non-default values, these limits are checked during I/O and Too Many Active or Too Many Open command status is returned if they are exceeded. Signed-off-by: Hans Holmberg Signed-off-by: Dmitry Fomichev --- hw/block/nvme-ns.c | 28 ++++++++++++- hw/block/nvme-ns.h | 41 +++++++++++++++++++ hw/block/nvme.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 166 insertions(+), 2 deletions(-) diff --git a/hw/block/nvme-ns.c b/hw/block/nvme-ns.c index fedfad595c..8d9e11eef2 100644 --- a/hw/block/nvme-ns.c +++ b/hw/block/nvme-ns.c @@ -118,6 +118,20 @@ static int nvme_calc_zone_geometry(NvmeNamespace *ns, Error **errp) ns->zone_size_log2 = 63 - clz64(ns->zone_size); } + /* Make sure that the values of all ZNS properties are sane */ + if (ns->params.max_open_zones > nz) { + error_setg(errp, + "max_open_zones value %u exceeds the number of zones %u", + ns->params.max_open_zones, nz); + return -1; + } + if (ns->params.max_active_zones > nz) { + error_setg(errp, + "max_active_zones value %u exceeds the number of zones %u", + ns->params.max_active_zones, nz); + return -1; + } + return 0; } @@ -172,8 +186,8 @@ static int nvme_zoned_init_ns(NvmeCtrl *n, NvmeNamespace *ns, int lba_index, id_ns_z = g_malloc0(sizeof(NvmeIdNsZoned)); /* MAR/MOR are zeroes-based, 0xffffffff means no limit */ - id_ns_z->mar = 0xffffffff; - id_ns_z->mor = 0xffffffff; + id_ns_z->mar = cpu_to_le32(ns->params.max_active_zones - 1); + id_ns_z->mor = cpu_to_le32(ns->params.max_open_zones - 1); id_ns_z->zoc = 0; id_ns_z->ozcs = ns->params.cross_zone_read ? 0x01 : 0x00; @@ -199,6 +213,9 @@ static void nvme_zoned_clear_ns(NvmeNamespace *ns) uint32_t set_state; int i; + ns->nr_active_zones = 0; + ns->nr_open_zones = 0; + zone = ns->zone_array; for (i = 0; i < ns->num_zones; i++, zone++) { switch (nvme_get_zone_state(zone)) { @@ -209,6 +226,7 @@ static void nvme_zoned_clear_ns(NvmeNamespace *ns) QTAILQ_REMOVE(&ns->exp_open_zones, zone, entry); break; case NVME_ZONE_STATE_CLOSED: + nvme_aor_inc_active(ns); /* fall through */ default: continue; @@ -216,6 +234,9 @@ static void nvme_zoned_clear_ns(NvmeNamespace *ns) if (zone->d.wp == zone->d.zslba) { set_state = NVME_ZONE_STATE_EMPTY; + } else if (ns->params.max_active_zones == 0 || + ns->nr_active_zones < ns->params.max_active_zones) { + set_state = NVME_ZONE_STATE_CLOSED; } else { set_state = NVME_ZONE_STATE_CLOSED; } @@ -224,6 +245,7 @@ static void nvme_zoned_clear_ns(NvmeNamespace *ns) case NVME_ZONE_STATE_CLOSED: trace_pci_nvme_clear_ns_close(nvme_get_zone_state(zone), zone->d.zslba); + nvme_aor_inc_active(ns); QTAILQ_INSERT_TAIL(&ns->closed_zones, zone, entry); break; case NVME_ZONE_STATE_EMPTY: @@ -326,6 +348,8 @@ static Property nvme_ns_props[] = { DEFINE_PROP_SIZE("zone_capacity", NvmeNamespace, params.zone_cap_bs, 0), DEFINE_PROP_BOOL("cross_zone_read", NvmeNamespace, params.cross_zone_read, false), + DEFINE_PROP_UINT32("max_active", NvmeNamespace, params.max_active_zones, 0), + DEFINE_PROP_UINT32("max_open", NvmeNamespace, params.max_open_zones, 0), DEFINE_PROP_END_OF_LIST(), }; diff --git a/hw/block/nvme-ns.h b/hw/block/nvme-ns.h index 170cbb8cdc..b0633d0def 100644 --- a/hw/block/nvme-ns.h +++ b/hw/block/nvme-ns.h @@ -34,6 +34,8 @@ typedef struct NvmeNamespaceParams { bool cross_zone_read; uint64_t zone_size_bs; uint64_t zone_cap_bs; + uint32_t max_active_zones; + uint32_t max_open_zones; } NvmeNamespaceParams; typedef struct NvmeNamespace { @@ -56,6 +58,8 @@ typedef struct NvmeNamespace { uint64_t zone_capacity; uint64_t zone_array_size; uint32_t zone_size_log2; + int32_t nr_open_zones; + int32_t nr_active_zones; NvmeNamespaceParams params; } NvmeNamespace; @@ -123,6 +127,43 @@ static inline bool nvme_wp_is_valid(NvmeZone *zone) st != NVME_ZONE_STATE_OFFLINE; } +static inline void nvme_aor_inc_open(NvmeNamespace *ns) +{ + assert(ns->nr_open_zones >= 0); + if (ns->params.max_open_zones) { + ns->nr_open_zones++; + assert(ns->nr_open_zones <= ns->params.max_open_zones); + } +} + +static inline void nvme_aor_dec_open(NvmeNamespace *ns) +{ + if (ns->params.max_open_zones) { + assert(ns->nr_open_zones > 0); + ns->nr_open_zones--; + } + assert(ns->nr_open_zones >= 0); +} + +static inline void nvme_aor_inc_active(NvmeNamespace *ns) +{ + assert(ns->nr_active_zones >= 0); + if (ns->params.max_active_zones) { + ns->nr_active_zones++; + assert(ns->nr_active_zones <= ns->params.max_active_zones); + } +} + +static inline void nvme_aor_dec_active(NvmeNamespace *ns) +{ + if (ns->params.max_active_zones) { + assert(ns->nr_active_zones > 0); + ns->nr_active_zones--; + assert(ns->nr_active_zones >= ns->nr_open_zones); + } + assert(ns->nr_active_zones >= 0); +} + int nvme_ns_setup(NvmeCtrl *n, NvmeNamespace *ns, Error **errp); void nvme_ns_drain(NvmeNamespace *ns); void nvme_ns_flush(NvmeNamespace *ns); diff --git a/hw/block/nvme.c b/hw/block/nvme.c index 34d0d0250d..b3cdfccdfb 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -199,6 +199,26 @@ static void nvme_assign_zone_state(NvmeNamespace *ns, NvmeZone *zone, } } +/* + * Check if we can open a zone without exceeding open/active limits. + * AOR stands for "Active and Open Resources" (see TP 4053 section 2.5). + */ +static int nvme_aor_check(NvmeNamespace *ns, uint32_t act, uint32_t opn) +{ + if (ns->params.max_active_zones != 0 && + ns->nr_active_zones + act > ns->params.max_active_zones) { + trace_pci_nvme_err_insuff_active_res(ns->params.max_active_zones); + return NVME_ZONE_TOO_MANY_ACTIVE | NVME_DNR; + } + if (ns->params.max_open_zones != 0 && + ns->nr_open_zones + opn > ns->params.max_open_zones) { + trace_pci_nvme_err_insuff_open_res(ns->params.max_open_zones); + return NVME_ZONE_TOO_MANY_OPEN | NVME_DNR; + } + + return NVME_SUCCESS; +} + static bool nvme_addr_is_cmb(NvmeCtrl *n, hwaddr addr) { hwaddr low = n->ctrl_mem.addr; @@ -1207,6 +1227,41 @@ static uint16_t nvme_check_zone_read(NvmeNamespace *ns, NvmeZone *zone, return status; } +static void nvme_auto_transition_zone(NvmeNamespace *ns, bool implicit, + bool adding_active) +{ + NvmeZone *zone; + + if (implicit && ns->params.max_open_zones && + ns->nr_open_zones == ns->params.max_open_zones) { + zone = QTAILQ_FIRST(&ns->imp_open_zones); + if (zone) { + /* + * Automatically close this implicitly open zone. + */ + QTAILQ_REMOVE(&ns->imp_open_zones, zone, entry); + nvme_aor_dec_open(ns); + nvme_assign_zone_state(ns, zone, NVME_ZONE_STATE_CLOSED); + } + } +} + +static uint16_t nvme_auto_open_zone(NvmeNamespace *ns, NvmeZone *zone) +{ + uint16_t status = NVME_SUCCESS; + uint8_t zs = nvme_get_zone_state(zone); + + if (zs == NVME_ZONE_STATE_EMPTY) { + nvme_auto_transition_zone(ns, true, true); + status = nvme_aor_check(ns, 1, 1); + } else if (zs == NVME_ZONE_STATE_CLOSED) { + nvme_auto_transition_zone(ns, true, false); + status = nvme_aor_check(ns, 0, 1); + } + + return status; +} + static bool nvme_finalize_zoned_write(NvmeNamespace *ns, NvmeRequest *req, bool failed) { @@ -1243,7 +1298,11 @@ static bool nvme_finalize_zoned_write(NvmeNamespace *ns, NvmeRequest *req, switch (nvme_get_zone_state(zone)) { case NVME_ZONE_STATE_IMPLICITLY_OPEN: case NVME_ZONE_STATE_EXPLICITLY_OPEN: + nvme_aor_dec_open(ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + nvme_aor_dec_active(ns); + /* fall through */ case NVME_ZONE_STATE_EMPTY: nvme_assign_zone_state(ns, zone, NVME_ZONE_STATE_FULL); /* fall through */ @@ -1272,7 +1331,10 @@ static uint64_t nvme_advance_zone_wp(NvmeNamespace *ns, NvmeZone *zone, zs = nvme_get_zone_state(zone); switch (zs) { case NVME_ZONE_STATE_EMPTY: + nvme_aor_inc_active(ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + nvme_aor_inc_open(ns); nvme_assign_zone_state(ns, zone, NVME_ZONE_STATE_IMPLICITLY_OPEN); } } @@ -1378,6 +1440,11 @@ static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req) goto invalid; } + status = nvme_auto_open_zone(ns, zone); + if (status != NVME_SUCCESS) { + goto invalid; + } + req->cqe.result64 = nvme_advance_zone_wp(ns, zone, nlb); } @@ -1436,6 +1503,11 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req, bool append) slba = zone->w_ptr; } + status = nvme_auto_open_zone(ns, zone); + if (status != NVME_SUCCESS) { + goto invalid; + } + req->cqe.result64 = nvme_advance_zone_wp(ns, zone, nlb); } else { status = nvme_check_zone_read(ns, zone, slba, nlb, &rfc); @@ -1537,9 +1609,27 @@ static uint16_t nvme_get_mgmt_zone_slba_idx(NvmeNamespace *ns, NvmeCmd *c, static uint16_t nvme_open_zone(NvmeNamespace *ns, NvmeZone *zone, uint8_t state) { + uint16_t status; + switch (state) { case NVME_ZONE_STATE_EMPTY: + nvme_auto_transition_zone(ns, false, true); + status = nvme_aor_check(ns, 1, 0); + if (status != NVME_SUCCESS) { + return status; + } + nvme_aor_inc_active(ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + status = nvme_aor_check(ns, 0, 1); + if (status != NVME_SUCCESS) { + if (state == NVME_ZONE_STATE_EMPTY) { + nvme_aor_dec_active(ns); + } + return status; + } + nvme_aor_inc_open(ns); + /* fall through */ case NVME_ZONE_STATE_IMPLICITLY_OPEN: nvme_assign_zone_state(ns, zone, NVME_ZONE_STATE_EXPLICITLY_OPEN); /* fall through */ @@ -1561,6 +1651,7 @@ static uint16_t nvme_close_zone(NvmeNamespace *ns, NvmeZone *zone, switch (state) { case NVME_ZONE_STATE_EXPLICITLY_OPEN: case NVME_ZONE_STATE_IMPLICITLY_OPEN: + nvme_aor_dec_open(ns); nvme_assign_zone_state(ns, zone, NVME_ZONE_STATE_CLOSED); /* fall through */ case NVME_ZONE_STATE_CLOSED: @@ -1582,7 +1673,11 @@ static uint16_t nvme_finish_zone(NvmeNamespace *ns, NvmeZone *zone, switch (state) { case NVME_ZONE_STATE_EXPLICITLY_OPEN: case NVME_ZONE_STATE_IMPLICITLY_OPEN: + nvme_aor_dec_open(ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + nvme_aor_dec_active(ns); + /* fall through */ case NVME_ZONE_STATE_EMPTY: zone->w_ptr = nvme_zone_wr_boundary(zone); zone->d.wp = zone->w_ptr; @@ -1608,7 +1703,11 @@ static uint16_t nvme_reset_zone(NvmeNamespace *ns, NvmeZone *zone, switch (state) { case NVME_ZONE_STATE_EXPLICITLY_OPEN: case NVME_ZONE_STATE_IMPLICITLY_OPEN: + nvme_aor_dec_open(ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + nvme_aor_dec_active(ns); + /* fall through */ case NVME_ZONE_STATE_FULL: zone->w_ptr = zone->d.zslba; zone->d.wp = zone->w_ptr;