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Diffstat (limited to 'drivers/block/rsxx/dev.c')
-rw-r--r--drivers/block/rsxx/dev.c306
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);
-}
-
-
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-24 19:27:49 +0300