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-rw-r--r--drivers/nvme/host/core.c192
-rw-r--r--drivers/nvme/host/nvme.h3
2 files changed, 103 insertions, 92 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 2818c17e92ed..ab040eef83e7 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -928,6 +928,106 @@ out:
return ERR_PTR(ret);
}
+static u32 nvme_known_admin_effects(u8 opcode)
+{
+ switch (opcode) {
+ case nvme_admin_format_nvm:
+ return NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC |
+ NVME_CMD_EFFECTS_CSE_MASK;
+ case nvme_admin_sanitize_nvm:
+ return NVME_CMD_EFFECTS_CSE_MASK;
+ default:
+ break;
+ }
+ return 0;
+}
+
+u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns, u8 opcode)
+{
+ u32 effects = 0;
+
+ if (ns) {
+ if (ns->head->effects)
+ effects = le32_to_cpu(ns->head->effects->iocs[opcode]);
+ if (effects & ~(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC))
+ dev_warn(ctrl->device,
+ "IO command:%02x has unhandled effects:%08x\n",
+ opcode, effects);
+ return 0;
+ }
+
+ if (ctrl->effects)
+ effects = le32_to_cpu(ctrl->effects->acs[opcode]);
+ effects |= nvme_known_admin_effects(opcode);
+
+ return effects;
+}
+EXPORT_SYMBOL_NS_GPL(nvme_command_effects, NVME_TARGET_PASSTHRU);
+
+static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
+ u8 opcode)
+{
+ u32 effects = nvme_command_effects(ctrl, ns, opcode);
+
+ /*
+ * For simplicity, IO to all namespaces is quiesced even if the command
+ * effects say only one namespace is affected.
+ */
+ if (effects & (NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK)) {
+ mutex_lock(&ctrl->scan_lock);
+ mutex_lock(&ctrl->subsys->lock);
+ nvme_mpath_start_freeze(ctrl->subsys);
+ nvme_mpath_wait_freeze(ctrl->subsys);
+ nvme_start_freeze(ctrl);
+ nvme_wait_freeze(ctrl);
+ }
+ return effects;
+}
+
+static void nvme_update_formats(struct nvme_ctrl *ctrl, u32 *effects)
+{
+ struct nvme_ns *ns;
+
+ down_read(&ctrl->namespaces_rwsem);
+ list_for_each_entry(ns, &ctrl->namespaces, list)
+ if (_nvme_revalidate_disk(ns->disk))
+ nvme_set_queue_dying(ns);
+ else if (blk_queue_is_zoned(ns->disk->queue)) {
+ /*
+ * IO commands are required to fully revalidate a zoned
+ * device. Force the command effects to trigger rescan
+ * work so report zones can run in a context with
+ * unfrozen IO queues.
+ */
+ *effects |= NVME_CMD_EFFECTS_NCC;
+ }
+ up_read(&ctrl->namespaces_rwsem);
+}
+
+static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects)
+{
+ /*
+ * Revalidate LBA changes prior to unfreezing. This is necessary to
+ * prevent memory corruption if a logical block size was changed by
+ * this command.
+ */
+ if (effects & NVME_CMD_EFFECTS_LBCC)
+ nvme_update_formats(ctrl, &effects);
+ if (effects & (NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK)) {
+ nvme_unfreeze(ctrl);
+ nvme_mpath_unfreeze(ctrl->subsys);
+ mutex_unlock(&ctrl->subsys->lock);
+ nvme_remove_invalid_namespaces(ctrl, NVME_NSID_ALL);
+ mutex_unlock(&ctrl->scan_lock);
+ }
+ if (effects & NVME_CMD_EFFECTS_CCC)
+ nvme_init_identify(ctrl);
+ if (effects & (NVME_CMD_EFFECTS_NIC | NVME_CMD_EFFECTS_NCC)) {
+ nvme_queue_scan(ctrl);
+ flush_work(&ctrl->scan_work);
+ }
+}
+
static int nvme_submit_user_cmd(struct request_queue *q,
struct nvme_command *cmd, void __user *ubuffer,
unsigned bufflen, void __user *meta_buffer, unsigned meta_len,
@@ -1394,98 +1494,6 @@ static int nvme_submit_io(struct nvme_ns *ns, struct nvme_user_io __user *uio)
metadata, meta_len, lower_32_bits(io.slba), NULL, 0);
}
-static u32 nvme_known_admin_effects(u8 opcode)
-{
- switch (opcode) {
- case nvme_admin_format_nvm:
- return NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC |
- NVME_CMD_EFFECTS_CSE_MASK;
- case nvme_admin_sanitize_nvm:
- return NVME_CMD_EFFECTS_CSE_MASK;
- default:
- break;
- }
- return 0;
-}
-
-static u32 nvme_passthru_start(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
- u8 opcode)
-{
- u32 effects = 0;
-
- if (ns) {
- if (ns->head->effects)
- effects = le32_to_cpu(ns->head->effects->iocs[opcode]);
- if (effects & ~(NVME_CMD_EFFECTS_CSUPP | NVME_CMD_EFFECTS_LBCC))
- dev_warn(ctrl->device,
- "IO command:%02x has unhandled effects:%08x\n",
- opcode, effects);
- return 0;
- }
-
- if (ctrl->effects)
- effects = le32_to_cpu(ctrl->effects->acs[opcode]);
- effects |= nvme_known_admin_effects(opcode);
-
- /*
- * For simplicity, IO to all namespaces is quiesced even if the command
- * effects say only one namespace is affected.
- */
- if (effects & (NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK)) {
- mutex_lock(&ctrl->scan_lock);
- mutex_lock(&ctrl->subsys->lock);
- nvme_mpath_start_freeze(ctrl->subsys);
- nvme_mpath_wait_freeze(ctrl->subsys);
- nvme_start_freeze(ctrl);
- nvme_wait_freeze(ctrl);
- }
- return effects;
-}
-
-static void nvme_update_formats(struct nvme_ctrl *ctrl, u32 *effects)
-{
- struct nvme_ns *ns;
-
- down_read(&ctrl->namespaces_rwsem);
- list_for_each_entry(ns, &ctrl->namespaces, list)
- if (_nvme_revalidate_disk(ns->disk))
- nvme_set_queue_dying(ns);
- else if (blk_queue_is_zoned(ns->disk->queue)) {
- /*
- * IO commands are required to fully revalidate a zoned
- * device. Force the command effects to trigger rescan
- * work so report zones can run in a context with
- * unfrozen IO queues.
- */
- *effects |= NVME_CMD_EFFECTS_NCC;
- }
- up_read(&ctrl->namespaces_rwsem);
-}
-
-static void nvme_passthru_end(struct nvme_ctrl *ctrl, u32 effects)
-{
- /*
- * Revalidate LBA changes prior to unfreezing. This is necessary to
- * prevent memory corruption if a logical block size was changed by
- * this command.
- */
- if (effects & NVME_CMD_EFFECTS_LBCC)
- nvme_update_formats(ctrl, &effects);
- if (effects & (NVME_CMD_EFFECTS_LBCC | NVME_CMD_EFFECTS_CSE_MASK)) {
- nvme_unfreeze(ctrl);
- nvme_mpath_unfreeze(ctrl->subsys);
- mutex_unlock(&ctrl->subsys->lock);
- nvme_remove_invalid_namespaces(ctrl, NVME_NSID_ALL);
- mutex_unlock(&ctrl->scan_lock);
- }
- if (effects & NVME_CMD_EFFECTS_CCC)
- nvme_init_identify(ctrl);
- if (effects & (NVME_CMD_EFFECTS_NIC | NVME_CMD_EFFECTS_NCC)) {
- nvme_queue_scan(ctrl);
- flush_work(&ctrl->scan_work);
- }
-}
-
static int nvme_user_cmd(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
struct nvme_passthru_cmd __user *ucmd)
{
diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 1609267a1f0e..25063f041f8d 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -790,4 +790,7 @@ void nvme_hwmon_init(struct nvme_ctrl *ctrl);
static inline void nvme_hwmon_init(struct nvme_ctrl *ctrl) { }
#endif
+u32 nvme_command_effects(struct nvme_ctrl *ctrl, struct nvme_ns *ns,
+ u8 opcode);
+
#endif /* _NVME_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 00:01:15 +0000