block: remove the rsxx driver

This driver was for rare and shortlived high end enterprise hardware
and hasn't been maintained since 2014, which also means it never got
converted to use blk-mq.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 0 insertions, 306 deletions

diff --git a/drivers/block/rsxx/dev.c b/drivers/block/rsxx/dev.c
deleted file mode 100644
index dd33f1bdf3b8..000000000000
--- a/drivers/block/rsxx/dev.c
+++ /dev/null
@@ -1,306 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
-* Filename: dev.c
-*
-* Authors: Joshua Morris <josh.h.morris@us.ibm.com>
-*	Philip Kelleher <pjk1939@linux.vnet.ibm.com>
-*
-* (C) Copyright 2013 IBM Corporation
-*/
-
-#include <linux/kernel.h>
-#include <linux/interrupt.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-
-#include <linux/hdreg.h>
-#include <linux/genhd.h>
-#include <linux/blkdev.h>
-#include <linux/bio.h>
-
-#include <linux/fs.h>
-
-#include "rsxx_priv.h"
-
-static unsigned int blkdev_minors = 64;
-module_param(blkdev_minors, uint, 0444);
-MODULE_PARM_DESC(blkdev_minors, "Number of minors(partitions)");
-
-/*
- * For now I'm making this tweakable in case any applications hit this limit.
- * If you see a "bio too big" error in the log you will need to raise this
- * value.
- */
-static unsigned int blkdev_max_hw_sectors = 1024;
-module_param(blkdev_max_hw_sectors, uint, 0444);
-MODULE_PARM_DESC(blkdev_max_hw_sectors, "Max hw sectors for a single BIO");
-
-static unsigned int enable_blkdev = 1;
-module_param(enable_blkdev , uint, 0444);
-MODULE_PARM_DESC(enable_blkdev, "Enable block device interfaces");
-
-
-struct rsxx_bio_meta {
-	struct bio	*bio;
-	atomic_t	pending_dmas;
-	atomic_t	error;
-	unsigned long	start_time;
-};
-
-static struct kmem_cache *bio_meta_pool;
-
-static void rsxx_submit_bio(struct bio *bio);
-
-/*----------------- Block Device Operations -----------------*/
-static int rsxx_blkdev_ioctl(struct block_device *bdev,
-				 fmode_t mode,
-				 unsigned int cmd,
-				 unsigned long arg)
-{
-	struct rsxx_cardinfo *card = bdev->bd_disk->private_data;
-
-	switch (cmd) {
-	case RSXX_GETREG:
-		return rsxx_reg_access(card, (void __user *)arg, 1);
-	case RSXX_SETREG:
-		return rsxx_reg_access(card, (void __user *)arg, 0);
-	}
-
-	return -ENOTTY;
-}
-
-static int rsxx_getgeo(struct block_device *bdev, struct hd_geometry *geo)
-{
-	struct rsxx_cardinfo *card = bdev->bd_disk->private_data;
-	u64 blocks = card->size8 >> 9;
-
-	/*
-	 * get geometry: Fake it. I haven't found any drivers that set
-	 * geo->start, so we won't either.
-	 */
-	if (card->size8) {
-		geo->heads = 64;
-		geo->sectors = 16;
-		do_div(blocks, (geo->heads * geo->sectors));
-		geo->cylinders = blocks;
-	} else {
-		geo->heads = 0;
-		geo->sectors = 0;
-		geo->cylinders = 0;
-	}
-	return 0;
-}
-
-static const struct block_device_operations rsxx_fops = {
-	.owner		= THIS_MODULE,
-	.submit_bio	= rsxx_submit_bio,
-	.getgeo		= rsxx_getgeo,
-	.ioctl		= rsxx_blkdev_ioctl,
-};
-
-static void bio_dma_done_cb(struct rsxx_cardinfo *card,
-			    void *cb_data,
-			    unsigned int error)
-{
-	struct rsxx_bio_meta *meta = cb_data;
-
-	if (error)
-		atomic_set(&meta->error, 1);
-
-	if (atomic_dec_and_test(&meta->pending_dmas)) {
-		if (!card->eeh_state && card->gendisk)
-			bio_end_io_acct(meta->bio, meta->start_time);
-
-		if (atomic_read(&meta->error))
-			bio_io_error(meta->bio);
-		else
-			bio_endio(meta->bio);
-		kmem_cache_free(bio_meta_pool, meta);
-	}
-}
-
-static void rsxx_submit_bio(struct bio *bio)
-{
-	struct rsxx_cardinfo *card = bio->bi_bdev->bd_disk->private_data;
-	struct rsxx_bio_meta *bio_meta;
-	blk_status_t st = BLK_STS_IOERR;
-
-	blk_queue_split(&bio);
-
-	might_sleep();
-
-	if (!card)
-		goto req_err;
-
-	if (bio_end_sector(bio) > get_capacity(card->gendisk))
-		goto req_err;
-
-	if (unlikely(card->halt))
-		goto req_err;
-
-	if (unlikely(card->dma_fault))
-		goto req_err;
-
-	if (bio->bi_iter.bi_size == 0) {
-		dev_err(CARD_TO_DEV(card), "size zero BIO!\n");
-		goto req_err;
-	}
-
-	bio_meta = kmem_cache_alloc(bio_meta_pool, GFP_KERNEL);
-	if (!bio_meta) {
-		st = BLK_STS_RESOURCE;
-		goto req_err;
-	}
-
-	bio_meta->bio = bio;
-	atomic_set(&bio_meta->error, 0);
-	atomic_set(&bio_meta->pending_dmas, 0);
-
-	if (!unlikely(card->halt))
-		bio_meta->start_time = bio_start_io_acct(bio);
-
-	dev_dbg(CARD_TO_DEV(card), "BIO[%c]: meta: %p addr8: x%llx size: %d\n",
-		 bio_data_dir(bio) ? 'W' : 'R', bio_meta,
-		 (u64)bio->bi_iter.bi_sector << 9, bio->bi_iter.bi_size);
-
-	st = rsxx_dma_queue_bio(card, bio, &bio_meta->pending_dmas,
-				    bio_dma_done_cb, bio_meta);
-	if (st)
-		goto queue_err;
-
-	return;
-
-queue_err:
-	kmem_cache_free(bio_meta_pool, bio_meta);
-req_err:
-	if (st)
-		bio->bi_status = st;
-	bio_endio(bio);
-}
-
-/*----------------- Device Setup -------------------*/
-static bool rsxx_discard_supported(struct rsxx_cardinfo *card)
-{
-	unsigned char pci_rev;
-
-	pci_read_config_byte(card->dev, PCI_REVISION_ID, &pci_rev);
-
-	return (pci_rev >= RSXX_DISCARD_SUPPORT);
-}
-
-int rsxx_attach_dev(struct rsxx_cardinfo *card)
-{
-	int err = 0;
-
-	mutex_lock(&card->dev_lock);
-
-	/* The block device requires the stripe size from the config. */
-	if (enable_blkdev) {
-		if (card->config_valid)
-			set_capacity(card->gendisk, card->size8 >> 9);
-		else
-			set_capacity(card->gendisk, 0);
-		err = device_add_disk(CARD_TO_DEV(card), card->gendisk, NULL);
-		if (err == 0)
-			card->bdev_attached = 1;
-	}
-
-	mutex_unlock(&card->dev_lock);
-
-	if (err)
-		blk_cleanup_disk(card->gendisk);
-
-	return err;
-}
-
-void rsxx_detach_dev(struct rsxx_cardinfo *card)
-{
-	mutex_lock(&card->dev_lock);
-
-	if (card->bdev_attached) {
-		del_gendisk(card->gendisk);
-		card->bdev_attached = 0;
-	}
-
-	mutex_unlock(&card->dev_lock);
-}
-
-int rsxx_setup_dev(struct rsxx_cardinfo *card)
-{
-	unsigned short blk_size;
-
-	mutex_init(&card->dev_lock);
-
-	if (!enable_blkdev)
-		return 0;
-
-	card->major = register_blkdev(0, DRIVER_NAME);
-	if (card->major < 0) {
-		dev_err(CARD_TO_DEV(card), "Failed to get major number\n");
-		return -ENOMEM;
-	}
-
-	card->gendisk = blk_alloc_disk(blkdev_minors);
-	if (!card->gendisk) {
-		dev_err(CARD_TO_DEV(card), "Failed disk alloc\n");
-		unregister_blkdev(card->major, DRIVER_NAME);
-		return -ENOMEM;
-	}
-
-	if (card->config_valid) {
-		blk_size = card->config.data.block_size;
-		blk_queue_dma_alignment(card->gendisk->queue, blk_size - 1);
-		blk_queue_logical_block_size(card->gendisk->queue, blk_size);
-	}
-
-	blk_queue_max_hw_sectors(card->gendisk->queue, blkdev_max_hw_sectors);
-	blk_queue_physical_block_size(card->gendisk->queue, RSXX_HW_BLK_SIZE);
-
-	blk_queue_flag_set(QUEUE_FLAG_NONROT, card->gendisk->queue);
-	blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, card->gendisk->queue);
-	if (rsxx_discard_supported(card)) {
-		blk_queue_flag_set(QUEUE_FLAG_DISCARD, card->gendisk->queue);
-		blk_queue_max_discard_sectors(card->gendisk->queue,
-						RSXX_HW_BLK_SIZE >> 9);
-		card->gendisk->queue->limits.discard_granularity =
-			RSXX_HW_BLK_SIZE;
-		card->gendisk->queue->limits.discard_alignment =
-			RSXX_HW_BLK_SIZE;
-	}
-
-	snprintf(card->gendisk->disk_name, sizeof(card->gendisk->disk_name),
-		 "rsxx%d", card->disk_id);
-	card->gendisk->major = card->major;
-	card->gendisk->minors = blkdev_minors;
-	card->gendisk->fops = &rsxx_fops;
-	card->gendisk->private_data = card;
-
-	return 0;
-}
-
-void rsxx_destroy_dev(struct rsxx_cardinfo *card)
-{
-	if (!enable_blkdev)
-		return;
-
-	blk_cleanup_disk(card->gendisk);
-	card->gendisk = NULL;
-	unregister_blkdev(card->major, DRIVER_NAME);
-}
-
-int rsxx_dev_init(void)
-{
-	bio_meta_pool = KMEM_CACHE(rsxx_bio_meta, SLAB_HWCACHE_ALIGN);
-	if (!bio_meta_pool)
-		return -ENOMEM;
-
-	return 0;
-}
-
-void rsxx_dev_cleanup(void)
-{
-	kmem_cache_destroy(bio_meta_pool);
-}
-
-