diff options
Diffstat (limited to 'drivers/nvme/nvme.h')
| -rw-r--r-- | drivers/nvme/nvme.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/drivers/nvme/nvme.h b/drivers/nvme/nvme.h index 8e9ae3c7f6..bc6b79f8dd 100644 --- a/drivers/nvme/nvme.h +++ b/drivers/nvme/nvme.h @@ -596,6 +596,7 @@ enum { /* Represents an NVM Express device. Each nvme_dev is a PCI function. */ struct nvme_dev { + struct udevice *udev; struct list_head node; struct nvme_queue **queues; u32 __iomem *dbs; @@ -622,6 +623,33 @@ struct nvme_dev { u32 nn; }; +/* Admin queue and a single I/O queue. */ +enum nvme_queue_id { + NVME_ADMIN_Q, + NVME_IO_Q, + NVME_Q_NUM, +}; + +/* + * An NVM Express queue. Each device has at least two (one for admin + * commands and one for I/O commands). + */ +struct nvme_queue { + struct nvme_dev *dev; + struct nvme_command *sq_cmds; + struct nvme_completion *cqes; + u32 __iomem *q_db; + u16 q_depth; + s16 cq_vector; + u16 sq_head; + u16 sq_tail; + u16 cq_head; + u16 qid; + u8 cq_phase; + u8 cqe_seen; + unsigned long cmdid_data[]; +}; + /* * An NVM Express namespace is equivalent to a SCSI LUN. * Each namespace is operated as an independent "device". @@ -636,6 +664,33 @@ struct nvme_ns { u8 flbas; }; +struct nvme_ops { + /** + * setup_queue - Controller-specific NVM Express queue setup. + * + * @nvmeq: NVM Express queue + * Return: 0 if OK, -ve on error + */ + int (*setup_queue)(struct nvme_queue *nvmeq); + /** + * submit_cmd - Controller-specific NVM Express command submission. + * + * If this function pointer is set to NULL, normal command + * submission is performed according to the NVM Express spec. + * + * @nvmeq: NVM Express queue + * @cmd: NVM Express command + */ + void (*submit_cmd)(struct nvme_queue *nvmeq, struct nvme_command *cmd); + /** + * complete_cmd - Controller-specific NVM Express command completion + * + * @nvmeq: NVM Express queue + * @cmd: NVM Express command + */ + void (*complete_cmd)(struct nvme_queue *nvmeq, struct nvme_command *cmd); +}; + int nvme_init(struct udevice *udev); #endif /* __DRIVER_NVME_H__ */ |