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scsi: cxlflash: Introduce OCXL backend 

Add initial infrastructure to support a new cxlflash transport, OCXL.

Claim a dependency on OCXL and add a new file, ocxl_hw.c, which will host the
backend routines that are specific to OCXL.

Signed-off-by: Uma Krishnan <ukrishn@linux.vnet.ibm.com>
Acked-by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Uma Krishnan 2018-03-26 11:30:51 -05:00 committed by Martin K. Petersen
parent fb77e52804
commit 76ebe01fce
4 changed files with 25 additions and 2 deletions
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2
drivers/scsi/cxlflash/Kconfig
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@ -4,7 +4,7 @@
config CXLFLASH
tristate "Support for IBM CAPI Flash"
depends on PCI && SCSI && CXL && EEH
depends on PCI && SCSI && CXL && OCXL && EEH
select IRQ_POLL
default m
help

2
drivers/scsi/cxlflash/Makefile
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@ -1,2 +1,2 @@
obj-$(CONFIG_CXLFLASH) += cxlflash.o
cxlflash-y += main.o superpipe.o lunmgt.o vlun.o cxl_hw.o
cxlflash-y += main.o superpipe.o lunmgt.o vlun.o cxl_hw.o ocxl_hw.o

1
drivers/scsi/cxlflash/backend.h
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@ -13,6 +13,7 @@
*/
extern const struct cxlflash_backend_ops cxlflash_cxl_ops;
extern const struct cxlflash_backend_ops cxlflash_ocxl_ops;
struct cxlflash_backend_ops {
struct module *module;

22
drivers/scsi/cxlflash/ocxl_hw.c Normal file
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@ -0,0 +1,22 @@
/*
* CXL Flash Device Driver
*
* Written by: Matthew R. Ochs <mrochs@linux.vnet.ibm.com>, IBM Corporation
* Uma Krishnan <ukrishn@linux.vnet.ibm.com>, IBM Corporation
*
* Copyright (C) 2018 IBM Corporation
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include <misc/ocxl.h>
#include "backend.h"
/* Backend ops to ocxlflash services */
const struct cxlflash_backend_ops cxlflash_ocxl_ops = {
.module = THIS_MODULE,
};