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-rw-r--r--drivers/nvme/host/core.c151
-rw-r--r--drivers/nvme/host/nvme.h4
-rw-r--r--include/linux/nvme.h48
3 files changed, 199 insertions, 4 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index aee37b73231d..5c50f53e32f3 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -65,6 +65,10 @@ static bool force_apst;
module_param(force_apst, bool, 0644);
MODULE_PARM_DESC(force_apst, "allow APST for newly enumerated devices even if quirked off");
+static bool streams;
+module_param(streams, bool, 0644);
+MODULE_PARM_DESC(streams, "turn on support for Streams write directives");
+
struct workqueue_struct *nvme_wq;
EXPORT_SYMBOL_GPL(nvme_wq);
@@ -297,6 +301,105 @@ struct request *nvme_alloc_request(struct request_queue *q,
}
EXPORT_SYMBOL_GPL(nvme_alloc_request);
+static int nvme_toggle_streams(struct nvme_ctrl *ctrl, bool enable)
+{
+ struct nvme_command c;
+
+ memset(&c, 0, sizeof(c));
+
+ c.directive.opcode = nvme_admin_directive_send;
+ c.directive.nsid = cpu_to_le32(0xffffffff);
+ c.directive.doper = NVME_DIR_SND_ID_OP_ENABLE;
+ c.directive.dtype = NVME_DIR_IDENTIFY;
+ c.directive.tdtype = NVME_DIR_STREAMS;
+ c.directive.endir = enable ? NVME_DIR_ENDIR : 0;
+
+ return nvme_submit_sync_cmd(ctrl->admin_q, &c, NULL, 0);
+}
+
+static int nvme_disable_streams(struct nvme_ctrl *ctrl)
+{
+ return nvme_toggle_streams(ctrl, false);
+}
+
+static int nvme_enable_streams(struct nvme_ctrl *ctrl)
+{
+ return nvme_toggle_streams(ctrl, true);
+}
+
+static int nvme_get_stream_params(struct nvme_ctrl *ctrl,
+ struct streams_directive_params *s, u32 nsid)
+{
+ struct nvme_command c;
+
+ memset(&c, 0, sizeof(c));
+ memset(s, 0, sizeof(*s));
+
+ c.directive.opcode = nvme_admin_directive_recv;
+ c.directive.nsid = cpu_to_le32(nsid);
+ c.directive.numd = sizeof(*s);
+ c.directive.doper = NVME_DIR_RCV_ST_OP_PARAM;
+ c.directive.dtype = NVME_DIR_STREAMS;
+
+ return nvme_submit_sync_cmd(ctrl->admin_q, &c, s, sizeof(*s));
+}
+
+static int nvme_configure_directives(struct nvme_ctrl *ctrl)
+{
+ struct streams_directive_params s;
+ int ret;
+
+ if (!(ctrl->oacs & NVME_CTRL_OACS_DIRECTIVES))
+ return 0;
+ if (!streams)
+ return 0;
+
+ ret = nvme_enable_streams(ctrl);
+ if (ret)
+ return ret;
+
+ ret = nvme_get_stream_params(ctrl, &s, 0xffffffff);
+ if (ret)
+ return ret;
+
+ ctrl->nssa = le16_to_cpu(s.nssa);
+ if (ctrl->nssa < BLK_MAX_WRITE_HINTS - 1) {
+ dev_info(ctrl->device, "too few streams (%u) available\n",
+ ctrl->nssa);
+ nvme_disable_streams(ctrl);
+ return 0;
+ }
+
+ ctrl->nr_streams = min_t(unsigned, ctrl->nssa, BLK_MAX_WRITE_HINTS - 1);
+ dev_info(ctrl->device, "Using %u streams\n", ctrl->nr_streams);
+ return 0;
+}
+
+/*
+ * Check if 'req' has a write hint associated with it. If it does, assign
+ * a valid namespace stream to the write.
+ */
+static void nvme_assign_write_stream(struct nvme_ctrl *ctrl,
+ struct request *req, u16 *control,
+ u32 *dsmgmt)
+{
+ enum rw_hint streamid = req->write_hint;
+
+ if (streamid == WRITE_LIFE_NOT_SET || streamid == WRITE_LIFE_NONE)
+ streamid = 0;
+ else {
+ streamid--;
+ if (WARN_ON_ONCE(streamid > ctrl->nr_streams))
+ return;
+
+ *control |= NVME_RW_DTYPE_STREAMS;
+ *dsmgmt |= streamid << 16;
+ }
+
+ if (streamid < ARRAY_SIZE(req->q->write_hints))
+ req->q->write_hints[streamid] += blk_rq_bytes(req) >> 9;
+}
+
static inline void nvme_setup_flush(struct nvme_ns *ns,
struct nvme_command *cmnd)
{
@@ -348,6 +451,7 @@ static blk_status_t nvme_setup_discard(struct nvme_ns *ns, struct request *req,
static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
struct request *req, struct nvme_command *cmnd)
{
+ struct nvme_ctrl *ctrl = ns->ctrl;
u16 control = 0;
u32 dsmgmt = 0;
@@ -375,6 +479,9 @@ static inline blk_status_t nvme_setup_rw(struct nvme_ns *ns,
cmnd->rw.slba = cpu_to_le64(nvme_block_nr(ns, blk_rq_pos(req)));
cmnd->rw.length = cpu_to_le16((blk_rq_bytes(req) >> ns->lba_shift) - 1);
+ if (req_op(req) == REQ_OP_WRITE && ctrl->nr_streams)
+ nvme_assign_write_stream(ctrl, req, &control, &dsmgmt);
+
if (ns->ms) {
switch (ns->pi_type) {
case NVME_NS_DPS_PI_TYPE3:
@@ -1094,8 +1201,15 @@ static void nvme_config_discard(struct nvme_ns *ns)
BUILD_BUG_ON(PAGE_SIZE / sizeof(struct nvme_dsm_range) <
NVME_DSM_MAX_RANGES);
- ns->queue->limits.discard_alignment = logical_block_size;
- ns->queue->limits.discard_granularity = logical_block_size;
+ if (ctrl->nr_streams && ns->sws && ns->sgs) {
+ unsigned int sz = logical_block_size * ns->sws * ns->sgs;
+
+ ns->queue->limits.discard_alignment = sz;
+ ns->queue->limits.discard_granularity = sz;
+ } else {
+ ns->queue->limits.discard_alignment = logical_block_size;
+ ns->queue->limits.discard_granularity = logical_block_size;
+ }
blk_queue_max_discard_sectors(ns->queue, UINT_MAX);
blk_queue_max_discard_segments(ns->queue, NVME_DSM_MAX_RANGES);
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, ns->queue);
@@ -1135,6 +1249,7 @@ static int nvme_revalidate_ns(struct nvme_ns *ns, struct nvme_id_ns **id)
static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
{
struct nvme_ns *ns = disk->private_data;
+ struct nvme_ctrl *ctrl = ns->ctrl;
u16 bs;
/*
@@ -1149,7 +1264,7 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
blk_mq_freeze_queue(disk->queue);
- if (ns->ctrl->ops->flags & NVME_F_METADATA_SUPPORTED)
+ if (ctrl->ops->flags & NVME_F_METADATA_SUPPORTED)
nvme_prep_integrity(disk, id, bs);
blk_queue_logical_block_size(ns->queue, bs);
if (ns->noiob)
@@ -1161,7 +1276,7 @@ static void __nvme_revalidate_disk(struct gendisk *disk, struct nvme_id_ns *id)
else
set_capacity(disk, le64_to_cpup(&id->nsze) << (ns->lba_shift - 9));
- if (ns->ctrl->oncs & NVME_CTRL_ONCS_DSM)
+ if (ctrl->oncs & NVME_CTRL_ONCS_DSM)
nvme_config_discard(ns);
blk_mq_unfreeze_queue(disk->queue);
}
@@ -1766,6 +1881,7 @@ int nvme_init_identify(struct nvme_ctrl *ctrl)
dev_pm_qos_hide_latency_tolerance(ctrl->device);
nvme_configure_apst(ctrl);
+ nvme_configure_directives(ctrl);
ctrl->identified = true;
@@ -2158,6 +2274,32 @@ static struct nvme_ns *nvme_find_get_ns(struct nvme_ctrl *ctrl, unsigned nsid)
return ret;
}
+static int nvme_setup_streams_ns(struct nvme_ctrl *ctrl, struct nvme_ns *ns)
+{
+ struct streams_directive_params s;
+ int ret;
+
+ if (!ctrl->nr_streams)
+ return 0;
+
+ ret = nvme_get_stream_params(ctrl, &s, ns->ns_id);
+ if (ret)
+ return ret;
+
+ ns->sws = le32_to_cpu(s.sws);
+ ns->sgs = le16_to_cpu(s.sgs);
+
+ if (ns->sws) {
+ unsigned int bs = 1 << ns->lba_shift;
+
+ blk_queue_io_min(ns->queue, bs * ns->sws);
+ if (ns->sgs)
+ blk_queue_io_opt(ns->queue, bs * ns->sws * ns->sgs);
+ }
+
+ return 0;
+}
+
static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
{
struct nvme_ns *ns;
@@ -2187,6 +2329,7 @@ static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
blk_queue_logical_block_size(ns->queue, 1 << ns->lba_shift);
nvme_set_queue_limits(ctrl, ns->queue);
+ nvme_setup_streams_ns(ctrl, ns);
sprintf(disk_name, "nvme%dn%d", ctrl->instance, ns->instance);
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index ec8c7363934d..f616835afc4c 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -147,6 +147,8 @@ struct nvme_ctrl {
u16 oncs;
u16 vid;
u16 oacs;
+ u16 nssa;
+ u16 nr_streams;
atomic_t abort_limit;
u8 event_limit;
u8 vwc;
@@ -199,6 +201,8 @@ struct nvme_ns {
unsigned ns_id;
int lba_shift;
u16 ms;
+ u16 sgs;
+ u32 sws;
bool ext;
u8 pi_type;
unsigned long flags;
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 291587a0743f..f516a975bb21 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -253,6 +253,7 @@ enum {
NVME_CTRL_ONCS_WRITE_ZEROES = 1 << 3,
NVME_CTRL_VWC_PRESENT = 1 << 0,
NVME_CTRL_OACS_SEC_SUPP = 1 << 0,
+ NVME_CTRL_OACS_DIRECTIVES = 1 << 5,
NVME_CTRL_OACS_DBBUF_SUPP = 1 << 7,
};
@@ -304,6 +305,19 @@ enum {
};
enum {
+ NVME_DIR_IDENTIFY = 0x00,
+ NVME_DIR_STREAMS = 0x01,
+ NVME_DIR_SND_ID_OP_ENABLE = 0x01,
+ NVME_DIR_SND_ST_OP_REL_ID = 0x01,
+ NVME_DIR_SND_ST_OP_REL_RSC = 0x02,
+ NVME_DIR_RCV_ID_OP_PARAM = 0x01,
+ NVME_DIR_RCV_ST_OP_PARAM = 0x01,
+ NVME_DIR_RCV_ST_OP_STATUS = 0x02,
+ NVME_DIR_RCV_ST_OP_RESOURCE = 0x03,
+ NVME_DIR_ENDIR = 0x01,
+};
+
+enum {
NVME_NS_FEAT_THIN = 1 << 0,
NVME_NS_FLBAS_LBA_MASK = 0xf,
NVME_NS_FLBAS_META_EXT = 0x10,
@@ -560,6 +574,7 @@ enum {
NVME_RW_PRINFO_PRCHK_APP = 1 << 11,
NVME_RW_PRINFO_PRCHK_GUARD = 1 << 12,
NVME_RW_PRINFO_PRACT = 1 << 13,
+ NVME_RW_DTYPE_STREAMS = 1 << 4,
};
struct nvme_dsm_cmd {
@@ -634,6 +649,8 @@ enum nvme_admin_opcode {
nvme_admin_download_fw = 0x11,
nvme_admin_ns_attach = 0x15,
nvme_admin_keep_alive = 0x18,
+ nvme_admin_directive_send = 0x19,
+ nvme_admin_directive_recv = 0x1a,
nvme_admin_dbbuf = 0x7C,
nvme_admin_format_nvm = 0x80,
nvme_admin_security_send = 0x81,
@@ -797,6 +814,24 @@ struct nvme_get_log_page_command {
__u32 rsvd14[2];
};
+struct nvme_directive_cmd {
+ __u8 opcode;
+ __u8 flags;
+ __u16 command_id;
+ __le32 nsid;
+ __u64 rsvd2[2];
+ union nvme_data_ptr dptr;
+ __le32 numd;
+ __u8 doper;
+ __u8 dtype;
+ __le16 dspec;
+ __u8 endir;
+ __u8 tdtype;
+ __u16 rsvd15;
+
+ __u32 rsvd16[3];
+};
+
/*
* Fabrics subcommands.
*/
@@ -927,6 +962,18 @@ struct nvme_dbbuf {
__u32 rsvd12[6];
};
+struct streams_directive_params {
+ __u16 msl;
+ __u16 nssa;
+ __u16 nsso;
+ __u8 rsvd[10];
+ __u32 sws;
+ __u16 sgs;
+ __u16 nsa;
+ __u16 nso;
+ __u8 rsvd2[6];
+};
+
struct nvme_command {
union {
struct nvme_common_command common;
@@ -947,6 +994,7 @@ struct nvme_command {
struct nvmf_property_set_command prop_set;
struct nvmf_property_get_command prop_get;
struct nvme_dbbuf dbbuf;
+ struct nvme_directive_cmd directive;
};
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-08-25 14:42:23 +0000