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23 Sep 2020 11:07:17 -0700 IronPort-SDR: t8oRNKQN0ZrL0xOHO7uF+/8S3y0OkAoL7EgyYsUvLqlJFWffN1ixPm8MYjm7h/I8v05EstUfCZ 6VWnp1MQKp/g== WDCIronportException: Internal Received: from unknown (HELO redsun50.ssa.fujisawa.hgst.com) ([10.149.66.24]) by uls-op-cesaip02.wdc.com with ESMTP; 23 Sep 2020 11:21:08 -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 v4 10/14] hw/block/nvme: Introduce max active and open zone limits Date: Thu, 24 Sep 2020 03:20:17 +0900 Message-Id: <20200923182021.3724-11-dmitry.fomichev@wdc.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200923182021.3724-1-dmitry.fomichev@wdc.com> References: <20200923182021.3724-1-dmitry.fomichev@wdc.com> MIME-Version: 1.0 Received-SPF: pass client-ip=68.232.143.124; envelope-from=prvs=5287de305=dmitry.fomichev@wdc.com; helo=esa2.hgst.iphmx.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/23 14:20:48 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" Added 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.c | 179 +++++++++++++++++++++++++++++++++++++++++++++++- hw/block/nvme.h | 4 ++ 2 files changed, 181 insertions(+), 2 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index 287984dd37..3f397a3ea7 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -176,6 +176,87 @@ static void nvme_remove_zone(NvmeCtrl *n, NvmeNamespace *ns, NvmeZoneList *zl, zone->prev = zone->next = 0; } +/* + * Take the first zone out from a list, return NULL if the list is empty. + */ +static NvmeZone *nvme_remove_zone_head(NvmeCtrl *n, NvmeNamespace *ns, + NvmeZoneList *zl) +{ + NvmeZone *zone = nvme_peek_zone_head(ns, zl); + + if (zone) { + --zl->size; + if (zl->size == 0) { + zl->head = NVME_ZONE_LIST_NIL; + zl->tail = NVME_ZONE_LIST_NIL; + } else { + zl->head = zone->next; + ns->zone_array[zl->head].prev = NVME_ZONE_LIST_NIL; + } + zone->prev = zone->next = 0; + } + + return 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(NvmeCtrl *n, NvmeNamespace *ns, + uint32_t act, uint32_t opn) +{ + if (n->params.max_active_zones != 0 && + ns->nr_active_zones + act > n->params.max_active_zones) { + trace_pci_nvme_err_insuff_active_res(n->params.max_active_zones); + return NVME_ZONE_TOO_MANY_ACTIVE | NVME_DNR; + } + if (n->params.max_open_zones != 0 && + ns->nr_open_zones + opn > n->params.max_open_zones) { + trace_pci_nvme_err_insuff_open_res(n->params.max_open_zones); + return NVME_ZONE_TOO_MANY_OPEN | NVME_DNR; + } + + return NVME_SUCCESS; +} + +static inline void nvme_aor_inc_open(NvmeCtrl *n, NvmeNamespace *ns) +{ + assert(ns->nr_open_zones >= 0); + if (n->params.max_open_zones) { + ns->nr_open_zones++; + assert(ns->nr_open_zones <= n->params.max_open_zones); + } +} + +static inline void nvme_aor_dec_open(NvmeCtrl *n, NvmeNamespace *ns) +{ + if (n->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(NvmeCtrl *n, NvmeNamespace *ns) +{ + assert(ns->nr_active_zones >= 0); + if (n->params.max_active_zones) { + ns->nr_active_zones++; + assert(ns->nr_active_zones <= n->params.max_active_zones); + } +} + +static inline void nvme_aor_dec_active(NvmeCtrl *n, NvmeNamespace *ns) +{ + if (n->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); +} + static void nvme_assign_zone_state(NvmeCtrl *n, NvmeNamespace *ns, NvmeZone *zone, uint8_t state) { @@ -790,6 +871,41 @@ static uint16_t nvme_check_zone_read(NvmeCtrl *n, NvmeZone *zone, uint64_t slba, return status; } +static void nvme_auto_transition_zone(NvmeCtrl *n, NvmeNamespace *ns, + bool implicit, bool adding_active) +{ + NvmeZone *zone; + + if (implicit && n->params.max_open_zones && + ns->nr_open_zones == n->params.max_open_zones) { + zone = nvme_remove_zone_head(n, ns, ns->imp_open_zones); + if (zone) { + /* + * Automatically close this implicitly open zone. + */ + nvme_aor_dec_open(n, ns); + nvme_assign_zone_state(n, ns, zone, NVME_ZONE_STATE_CLOSED); + } + } +} + +static uint16_t nvme_auto_open_zone(NvmeCtrl *n, 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(n, ns, true, true); + status = nvme_aor_check(n, ns, 1, 1); + } else if (zs == NVME_ZONE_STATE_CLOSED) { + nvme_auto_transition_zone(n, ns, true, false); + status = nvme_aor_check(n, ns, 0, 1); + } + + return status; +} + static inline uint32_t nvme_zone_idx(NvmeCtrl *n, uint64_t slba) { return n->zone_size_log2 > 0 ? slba >> n->zone_size_log2 : @@ -837,7 +953,11 @@ static bool nvme_finalize_zoned_write(NvmeCtrl *n, NvmeRequest *req, switch (zs) { case NVME_ZONE_STATE_IMPLICITLY_OPEN: case NVME_ZONE_STATE_EXPLICITLY_OPEN: + nvme_aor_dec_open(n, ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + nvme_aor_dec_active(n, ns); + /* fall through */ case NVME_ZONE_STATE_EMPTY: nvme_assign_zone_state(n, ns, zone, NVME_ZONE_STATE_FULL); /* fall through */ @@ -866,7 +986,10 @@ static uint64_t nvme_advance_zone_wp(NvmeCtrl *n, NvmeNamespace *ns, zs = nvme_get_zone_state(zone); switch (zs) { case NVME_ZONE_STATE_EMPTY: + nvme_aor_inc_active(n, ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + nvme_aor_inc_open(n, ns); nvme_assign_zone_state(n, ns, zone, NVME_ZONE_STATE_IMPLICITLY_OPEN); } @@ -958,6 +1081,11 @@ static uint16_t nvme_write_zeroes(NvmeCtrl *n, NvmeRequest *req) zone->w_ptr); return NVME_ZONE_INVALID_WRITE | NVME_DNR; } + + status = nvme_auto_open_zone(n, ns, zone); + if (status != NVME_SUCCESS) { + return status; + } } block_acct_start(blk_get_stats(n->conf.blk), &req->acct, 0, @@ -1033,6 +1161,12 @@ static uint16_t nvme_rw(NvmeCtrl *n, NvmeRequest *req, bool append) zone->w_ptr); return NVME_ZONE_INVALID_WRITE | NVME_DNR; } + + status = nvme_auto_open_zone(n, ns, zone); + if (status != NVME_SUCCESS) { + return status; + } + req->fill_ofs = -1LL; } else { status = nvme_check_zone_read(n, zone, slba, nlb, @@ -1129,9 +1263,27 @@ static uint16_t nvme_get_mgmt_zone_slba_idx(NvmeCtrl *n, NvmeNamespace *ns, static uint16_t nvme_open_zone(NvmeCtrl *n, NvmeNamespace *ns, NvmeZone *zone, uint8_t state) { + uint16_t status; + switch (state) { case NVME_ZONE_STATE_EMPTY: + nvme_auto_transition_zone(n, ns, false, true); + status = nvme_aor_check(n, ns, 1, 0); + if (status != NVME_SUCCESS) { + return status; + } + nvme_aor_inc_active(n, ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + status = nvme_aor_check(n, ns, 0, 1); + if (status != NVME_SUCCESS) { + if (state == NVME_ZONE_STATE_EMPTY) { + nvme_aor_dec_active(n, ns); + } + return status; + } + nvme_aor_inc_open(n, ns); + /* fall through */ case NVME_ZONE_STATE_IMPLICITLY_OPEN: nvme_assign_zone_state(n, ns, zone, NVME_ZONE_STATE_EXPLICITLY_OPEN); /* fall through */ @@ -1153,6 +1305,7 @@ static uint16_t nvme_close_zone(NvmeCtrl *n, NvmeNamespace *ns, switch (state) { case NVME_ZONE_STATE_EXPLICITLY_OPEN: case NVME_ZONE_STATE_IMPLICITLY_OPEN: + nvme_aor_dec_open(n, ns); nvme_assign_zone_state(n, ns, zone, NVME_ZONE_STATE_CLOSED); /* fall through */ case NVME_ZONE_STATE_CLOSED: @@ -1174,7 +1327,11 @@ static uint16_t nvme_finish_zone(NvmeCtrl *n, NvmeNamespace *ns, switch (state) { case NVME_ZONE_STATE_EXPLICITLY_OPEN: case NVME_ZONE_STATE_IMPLICITLY_OPEN: + nvme_aor_dec_open(n, ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + nvme_aor_dec_active(n, ns); + /* fall through */ case NVME_ZONE_STATE_EMPTY: zone->w_ptr = nvme_zone_wr_boundary(zone); nvme_assign_zone_state(n, ns, zone, NVME_ZONE_STATE_FULL); @@ -1199,7 +1356,11 @@ static uint16_t nvme_reset_zone(NvmeCtrl *n, NvmeNamespace *ns, switch (state) { case NVME_ZONE_STATE_EXPLICITLY_OPEN: case NVME_ZONE_STATE_IMPLICITLY_OPEN: + nvme_aor_dec_open(n, ns); + /* fall through */ case NVME_ZONE_STATE_CLOSED: + nvme_aor_dec_active(n, ns); + /* fall through */ case NVME_ZONE_STATE_FULL: zone->w_ptr = zone->d.zslba; zone->d.wp = zone->w_ptr; @@ -3262,6 +3423,18 @@ static void nvme_zoned_init_ctrl(NvmeCtrl *n, Error **errp) n->zasl_bs = n->params.zasl_kb * KiB; } + /* Make sure that the values of all Zoned Command Set properties are sane */ + if (n->params.max_open_zones > nz) { + warn_report("max_open_zones value %u exceeds the number of zones %u," + " adjusting", n->params.max_open_zones, nz); + n->params.max_open_zones = nz; + } + if (n->params.max_active_zones > nz) { + warn_report("max_active_zones value %u exceeds the number of zones %u," + " adjusting", n->params.max_active_zones, nz); + n->params.max_active_zones = nz; + } + return; } @@ -3279,8 +3452,8 @@ static int nvme_zoned_init_ns(NvmeCtrl *n, NvmeNamespace *ns, int lba_index, ns->id_ns_zoned = g_malloc0(sizeof(*ns->id_ns_zoned)); /* MAR/MOR are zeroes-based, 0xffffffff means no limit */ - ns->id_ns_zoned->mar = 0xffffffff; - ns->id_ns_zoned->mor = 0xffffffff; + ns->id_ns_zoned->mar = cpu_to_le32(n->params.max_active_zones - 1); + ns->id_ns_zoned->mor = cpu_to_le32(n->params.max_open_zones - 1); ns->id_ns_zoned->zoc = 0; ns->id_ns_zoned->ozcs = n->params.cross_zone_read ? 0x01 : 0x00; @@ -3676,6 +3849,8 @@ static Property nvme_props[] = { NVME_DEFAULT_ZONE_SIZE), DEFINE_PROP_UINT64("zone_capacity", NvmeCtrl, params.zone_capacity_mb, 0), DEFINE_PROP_UINT32("zone_append_size_limit", NvmeCtrl, params.zasl_kb, 0), + DEFINE_PROP_UINT32("max_active", NvmeCtrl, params.max_active_zones, 0), + DEFINE_PROP_UINT32("max_open", NvmeCtrl, params.max_open_zones, 0), DEFINE_PROP_BOOL("cross_zone_read", NvmeCtrl, params.cross_zone_read, true), DEFINE_PROP_UINT8("fill_pattern", NvmeCtrl, params.fill_pattern, 0), DEFINE_PROP_END_OF_LIST(), diff --git a/hw/block/nvme.h b/hw/block/nvme.h index d9f307f0ed..6efd566cb2 100644 --- a/hw/block/nvme.h +++ b/hw/block/nvme.h @@ -22,6 +22,8 @@ typedef struct NvmeParams { uint32_t zasl_kb; uint64_t zone_size_mb; uint64_t zone_capacity_mb; + uint32_t max_active_zones; + uint32_t max_open_zones; } NvmeParams; typedef struct NvmeAsyncEvent { @@ -103,6 +105,8 @@ typedef struct NvmeNamespace { NvmeZoneList *imp_open_zones; NvmeZoneList *closed_zones; NvmeZoneList *full_zones; + int32_t nr_open_zones; + int32_t nr_active_zones; } NvmeNamespace; static inline NvmeLBAF *nvme_ns_lbaf(NvmeNamespace *ns)