NVMe: Add nvme-scsi.c

Translates SCSI commands in SG_IO ioctl to NVMe commands.
Uses the scsi-nvme translation spec from nvmexpress.org as reference.

Signed-off-by: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Matthew Wilcox <matthew.r.wilcox@intel.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index f1974cab60cf..aa575033dbe7 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -546,6 +546,8 @@ struct nvme_ns {
 
         int ns_id;
         int lba_shift;
+        u64 mode_select_num_blocks;
+        u32 mode_select_block_len;
 };
 
 /*
@@ -563,6 +565,39 @@ struct nvme_iod {
         dma_addr_t first_dma;
         struct scatterlist sg[0];
 };
+
+/**
+ * nvme_free_iod - frees an nvme_iod
+ * @dev: The device that the I/O was submitted to
+ * @iod: The memory to free
+ */
+void nvme_free_iod(struct nvme_dev *dev, struct nvme_iod *iod);
+
+int nvme_setup_prps(struct nvme_dev *dev, struct nvme_common_command *cmd,
+                        struct nvme_iod *iod, int total_len, gfp_t gfp);
+struct nvme_iod *nvme_map_user_pages(struct nvme_dev *dev, int write,
+                                unsigned long addr, unsigned length);
+void nvme_unmap_user_pages(struct nvme_dev *dev, int write,
+                        struct nvme_iod *iod);
+struct nvme_queue *get_nvmeq(struct nvme_dev *dev);
+void put_nvmeq(struct nvme_queue *nvmeq);
+int nvme_submit_sync_cmd(struct nvme_queue *nvmeq, struct nvme_command *cmd,
+                                                u32 *result, unsigned timeout);
+int nvme_submit_flush_data(struct nvme_queue *nvmeq, struct nvme_ns *ns);
+int nvme_submit_admin_cmd(struct nvme_dev *, struct nvme_command *,
+                                                        u32 *result);
+int nvme_identify(struct nvme_dev *, unsigned nsid, unsigned cns,
+                                                        dma_addr_t dma_addr);
+int nvme_get_features(struct nvme_dev *dev, unsigned fid, unsigned nsid,
+                        dma_addr_t dma_addr, u32 *result);
+int nvme_set_features(struct nvme_dev *dev, unsigned fid, unsigned dword11,
+                        dma_addr_t dma_addr, u32 *result);
+
+struct sg_io_hdr;
+
+int nvme_sg_io(struct nvme_ns *ns, struct sg_io_hdr __user *u_hdr);
+int nvme_sg_get_version_num(int __user *ip);
+
 #endif
 
 #endif /* _LINUX_NVME_H */