1 files changed, 46 insertions, 33 deletions

diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h
index 5cd1fa3b8464..a2e1f298b217 100644
--- a/drivers/nvme/host/nvme.h
+++ b/drivers/nvme/host/nvme.h
@@ -11,7 +11,6 @@
 #include <linux/pci.h>
 #include <linux/kref.h>
 #include <linux/blk-mq.h>
-#include <linux/lightnvm.h>
 #include <linux/sed-opal.h>
 #include <linux/fault-inject.h>
 #include <linux/rcupdate.h>
@@ -48,11 +47,6 @@ extern struct workqueue_struct *nvme_wq;
 extern struct workqueue_struct *nvme_reset_wq;
 extern struct workqueue_struct *nvme_delete_wq;
 
-enum {
-	NVME_NS_LBA		= 0,
-	NVME_NS_LIGHTNVM	= 1,
-};
-
 /*
  * List of workarounds for devices that required behavior not specified in
  * the standard.
@@ -93,11 +87,6 @@ enum nvme_quirks {
 	NVME_QUIRK_NO_DEEPEST_PS		= (1 << 5),
 
 	/*
-	 * Supports the LighNVM command set if indicated in vs[1].
-	 */
-	NVME_QUIRK_LIGHTNVM			= (1 << 6),
-
-	/*
 	 * Set MEDIUM priority on SQ creation
 	 */
 	NVME_QUIRK_MEDIUM_PRIO_SQ		= (1 << 7),
@@ -158,6 +147,7 @@ enum nvme_quirks {
 struct nvme_request {
 	struct nvme_command	*cmd;
 	union nvme_result	result;
+	u8			genctr;
 	u8			retries;
 	u8			flags;
 	u16			status;
@@ -449,7 +439,6 @@ struct nvme_ns {
 	u32 ana_grpid;
 #endif
 	struct list_head siblings;
-	struct nvm_dev *ndev;
 	struct kref kref;
 	struct nvme_ns_head *head;
 
@@ -497,6 +486,49 @@ struct nvme_ctrl_ops {
 	int (*get_address)(struct nvme_ctrl *ctrl, char *buf, int size);
 };
 
+/*
+ * nvme command_id is constructed as such:
+ * | xxxx | xxxxxxxxxxxx |
+ *   gen    request tag
+ */
+#define nvme_genctr_mask(gen)			(gen & 0xf)
+#define nvme_cid_install_genctr(gen)		(nvme_genctr_mask(gen) << 12)
+#define nvme_genctr_from_cid(cid)		((cid & 0xf000) >> 12)
+#define nvme_tag_from_cid(cid)			(cid & 0xfff)
+
+static inline u16 nvme_cid(struct request *rq)
+{
+	return nvme_cid_install_genctr(nvme_req(rq)->genctr) | rq->tag;
+}
+
+static inline struct request *nvme_find_rq(struct blk_mq_tags *tags,
+		u16 command_id)
+{
+	u8 genctr = nvme_genctr_from_cid(command_id);
+	u16 tag = nvme_tag_from_cid(command_id);
+	struct request *rq;
+
+	rq = blk_mq_tag_to_rq(tags, tag);
+	if (unlikely(!rq)) {
+		pr_err("could not locate request for tag %#x\n",
+			tag);
+		return NULL;
+	}
+	if (unlikely(nvme_genctr_mask(nvme_req(rq)->genctr) != genctr)) {
+		dev_err(nvme_req(rq)->ctrl->device,
+			"request %#x genctr mismatch (got %#x expected %#x)\n",
+			tag, genctr, nvme_genctr_mask(nvme_req(rq)->genctr));
+		return NULL;
+	}
+	return rq;
+}
+
+static inline struct request *nvme_cid_to_rq(struct blk_mq_tags *tags,
+                u16 command_id)
+{
+	return blk_mq_tag_to_rq(tags, nvme_tag_from_cid(command_id));
+}
+
 #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
 void nvme_fault_inject_init(struct nvme_fault_inject *fault_inj,
 			    const char *dev_name);
@@ -594,7 +626,8 @@ static inline void nvme_put_ctrl(struct nvme_ctrl *ctrl)
 
 static inline bool nvme_is_aen_req(u16 qid, __u16 command_id)
 {
-	return !qid && command_id >= NVME_AQ_BLK_MQ_DEPTH;
+	return !qid &&
+		nvme_tag_from_cid(command_id) >= NVME_AQ_BLK_MQ_DEPTH;
 }
 
 void nvme_complete_rq(struct request *req);
@@ -823,26 +856,6 @@ static inline int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf)
 }
 #endif
 
-#ifdef CONFIG_NVM
-int nvme_nvm_register(struct nvme_ns *ns, char *disk_name, int node);
-void nvme_nvm_unregister(struct nvme_ns *ns);
-extern const struct attribute_group nvme_nvm_attr_group;
-int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd, void __user *argp);
-#else
-static inline int nvme_nvm_register(struct nvme_ns *ns, char *disk_name,
-				    int node)
-{
-	return 0;
-}
-
-static inline void nvme_nvm_unregister(struct nvme_ns *ns) {};
-static inline int nvme_nvm_ioctl(struct nvme_ns *ns, unsigned int cmd,
-		void __user *argp)
-{
-	return -ENOTTY;
-}
-#endif /* CONFIG_NVM */
-
 static inline struct nvme_ns *nvme_get_ns_from_dev(struct device *dev)
 {
 	return dev_to_disk(dev)->private_data;