106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
|
// SPDX-License-Identifier: GPL-2.0-or-later
|
||
|
|
/*
|
||
|
|
* Driver for Broadcom MPI3 Storage Controllers
|
||
|
|
*
|
||
|
|
* Copyright (C) 2017-2022 Broadcom Inc.
|
||
|
|
* (mailto: mpi3mr-linuxdrv.pdl@broadcom.com)
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "mpi3mr.h"
|
||
|
|
#include <linux/bsg-lib.h>
|
||
|
|
|
||
|
|
/**
|
||
|
|
* mpi3mr_bsg_request - bsg request entry point
|
||
|
|
* @job: BSG job reference
|
||
|
|
*
|
||
|
|
* This is driver's entry point for bsg requests
|
||
|
|
*
|
||
|
|
* Return: 0 on success and proper error codes on failure
|
||
|
|
*/
|
||
|
|
static int mpi3mr_bsg_request(struct bsg_job *job)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* mpi3mr_bsg_exit - de-registration from bsg layer
|
||
|
|
*
|
||
|
|
* This will be called during driver unload and all
|
||
|
|
* bsg resources allocated during load will be freed.
|
||
|
|
*
|
||
|
|
* Return:Nothing
|
||
|
|
*/
|
||
|
|
void mpi3mr_bsg_exit(struct mpi3mr_ioc *mrioc)
|
||
|
|
{
|
||
|
|
if (!mrioc->bsg_queue)
|
||
|
|
return;
|
||
|
|
|
||
|
|
bsg_remove_queue(mrioc->bsg_queue);
|
||
|
|
mrioc->bsg_queue = NULL;
|
||
|
|
|
||
|
|
device_del(mrioc->bsg_dev);
|
||
|
|
put_device(mrioc->bsg_dev);
|
||
|
|
kfree(mrioc->bsg_dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* mpi3mr_bsg_node_release -release bsg device node
|
||
|
|
* @dev: bsg device node
|
||
|
|
*
|
||
|
|
* decrements bsg dev reference count
|
||
|
|
*
|
||
|
|
* Return:Nothing
|
||
|
|
*/
|
||
|
|
static void mpi3mr_bsg_node_release(struct device *dev)
|
||
|
|
{
|
||
|
|
put_device(dev);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* mpi3mr_bsg_init - registration with bsg layer
|
||
|
|
*
|
||
|
|
* This will be called during driver load and it will
|
||
|
|
* register driver with bsg layer
|
||
|
|
*
|
||
|
|
* Return:Nothing
|
||
|
|
*/
|
||
|
|
void mpi3mr_bsg_init(struct mpi3mr_ioc *mrioc)
|
||
|
|
{
|
||
|
|
mrioc->bsg_dev = kzalloc(sizeof(struct device), GFP_KERNEL);
|
||
|
|
if (!mrioc->bsg_dev) {
|
||
|
|
ioc_err(mrioc, "bsg device mem allocation failed\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
device_initialize(mrioc->bsg_dev);
|
||
|
|
dev_set_name(mrioc->bsg_dev, "mpi3mrctl%u", mrioc->id);
|
||
|
|
|
||
|
|
if (device_add(mrioc->bsg_dev)) {
|
||
|
|
ioc_err(mrioc, "%s: bsg device add failed\n",
|
||
|
|
dev_name(mrioc->bsg_dev));
|
||
|
|
goto err_device_add;
|
||
|
|
}
|
||
|
|
|
||
|
|
mrioc->bsg_dev->release = mpi3mr_bsg_node_release;
|
||
|
|
|
||
|
|
mrioc->bsg_queue = bsg_setup_queue(mrioc->bsg_dev, dev_name(mrioc->bsg_dev),
|
||
|
|
mpi3mr_bsg_request, NULL, 0);
|
||
|
|
if (!mrioc->bsg_queue) {
|
||
|
|
ioc_err(mrioc, "%s: bsg registration failed\n",
|
||
|
|
dev_name(mrioc->bsg_dev));
|
||
|
|
goto err_setup_queue;
|
||
|
|
}
|
||
|
|
|
||
|
|
blk_queue_max_segments(mrioc->bsg_queue, MPI3MR_MAX_APP_XFER_SEGMENTS);
|
||
|
|
blk_queue_max_hw_sectors(mrioc->bsg_queue, MPI3MR_MAX_APP_XFER_SECTORS);
|
||
|
|
|
||
|
|
return;
|
||
|
|
|
||
|
|
err_setup_queue:
|
||
|
|
device_del(mrioc->bsg_dev);
|
||
|
|
put_device(mrioc->bsg_dev);
|
||
|
|
err_device_add:
|
||
|
|
kfree(mrioc->bsg_dev);
|
||
|
|
}
|