diff options
| author | Vishal Verma <vishal.l.verma@intel.com> | 2013-03-04 18:40:57 -0700 |
|---|---|---|
| committer | Matthew Wilcox <matthew.r.wilcox@intel.com> | 2013-03-27 07:05:42 -0400 |
| commit | 13c3b0fcc8e33ba49f252378f6e7290b146042af (patch) | |
| tree | 8f9e649baaa3d33c2788a46e1cd6f8ae43942315 /include/linux/nvme.h | |
| parent | 729dd1bd802acb973eec9c73ccb87d3143c13937 (diff) | |
NVMe: Move structures & definitions to header file
nvme-scsi.c uses several data structures and definitions that were
previously private to nvme-core.c. Move the definitions to nvme.h,
protected by __KERNEL__.
Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>
Diffstat (limited to 'include/linux/nvme.h')
| -rw-r--r-- | include/linux/nvme.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/include/linux/nvme.h b/include/linux/nvme.h index bde44c1fd213..6f899add14ab 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -493,4 +493,64 @@ struct nvme_admin_cmd { #define NVME_IOCTL_ADMIN_CMD _IOWR('N', 0x41, struct nvme_admin_cmd) #define NVME_IOCTL_SUBMIT_IO _IOW('N', 0x42, struct nvme_user_io) +#ifdef __KERNEL__ +#include <linux/pci.h> + +#define NVME_IO_TIMEOUT (5 * HZ) + +/* + * Represents an NVM Express device. Each nvme_dev is a PCI function. + */ +struct nvme_dev { + struct list_head node; + struct nvme_queue **queues; + u32 __iomem *dbs; + struct pci_dev *pci_dev; + struct dma_pool *prp_page_pool; + struct dma_pool *prp_small_pool; + int instance; + int queue_count; + int db_stride; + u32 ctrl_config; + struct msix_entry *entry; + struct nvme_bar __iomem *bar; + struct list_head namespaces; + char serial[20]; + char model[40]; + char firmware_rev[8]; + u32 max_hw_sectors; + u16 oncs; +}; + +/* + * An NVM Express namespace is equivalent to a SCSI LUN + */ +struct nvme_ns { + struct list_head list; + + struct nvme_dev *dev; + struct request_queue *queue; + struct gendisk *disk; + + int ns_id; + int lba_shift; +}; + +/* + * The nvme_iod describes the data in an I/O, including the list of PRP + * entries. You can't see it in this data structure because C doesn't let + * me express that. Use nvme_alloc_iod to ensure there's enough space + * allocated to store the PRP list. + */ +struct nvme_iod { + void *private; /* For the use of the submitter of the I/O */ + int npages; /* In the PRP list. 0 means small pool in use */ + int offset; /* Of PRP list */ + int nents; /* Used in scatterlist */ + int length; /* Of data, in bytes */ + dma_addr_t first_dma; + struct scatterlist sg[0]; +}; +#endif + #endif /* _LINUX_NVME_H */ |