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scsi: mpt3sas: Added support for nvme encapsulated request message.

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* Mpt3sas driver uses the NVMe Encapsulated Request message to send an
  NVMe command to an NVMe device attached to the IOC.

* Normal I/O commands like reads and writes are passed to the
  controller as SCSI commands and the controller has the ability to
  translate the commands to NVMe equivalent.

* This encapsulated NVMe command is used by applications to send
  direct NVMe commands to NVMe drives.

Signed-off-by: Chaitra P B <chaitra.basappa@broadcom.com>
Signed-off-by: Suganath Prabu S <suganath-prabu.subramani@broadcom.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Suganath Prabu Subramani
2017-10-31 18:02:29 +05:30
committed by Martin K. Petersen
parent 016d5c35e2
commit aff39e6121
3 changed files with 342 additions and 7 deletions
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4
drivers/scsi/mpt3sas/mpt3sas_base.h
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@@ -1184,6 +1184,9 @@ struct MPT3SAS_ADAPTER {
MPT_BUILD_SG build_sg_mpi;
MPT_BUILD_ZERO_LEN_SGE build_zero_len_sge_mpi;
/* function ptr for NVMe PRP elements only */
NVME_BUILD_PRP build_nvme_prp;
/* event log */
u32 event_type[MPI2_EVENT_NOTIFY_EVENTMASK_WORDS];
u32 event_context;
@@ -1354,6 +1357,7 @@ struct MPT3SAS_ADAPTER {
PUT_SMID_IO_FP_HIP put_smid_fast_path;
PUT_SMID_IO_FP_HIP put_smid_hi_priority;
PUT_SMID_DEFAULT put_smid_default;
PUT_SMID_DEFAULT put_smid_nvme_encap;
};