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Commit 3427f2b2 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Jens Axboe
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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: default avatarChristoph Hellwig <hch@lst.de>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent ac6f6548
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MAINTAINERS
View file @ 3427f2b2
......@@ -7425,12 +7425,6 @@ F: Documentation/firmware_class/
F: drivers/base/firmware_loader/
F: include/linux/firmware.h
FLASH ADAPTER DRIVER (IBM Flash Adapter 900GB Full Height PCI Flash Card)
M: Joshua Morris <josh.h.morris@us.ibm.com>
M: Philip Kelleher <pjk1939@linux.ibm.com>
S: Maintained
F: drivers/block/rsxx/
FLEXTIMER FTM-QUADDEC DRIVER
M: Patrick Havelange <patrick.havelange@essensium.com>
L: linux-iio@vger.kernel.org
......
drivers/block/Kconfig
View file @ 3427f2b2
......@@ -392,17 +392,6 @@ config BLK_DEV_RBD
If unsure, say N.
config BLK_DEV_RSXX
tristate "IBM Flash Adapter 900GB Full Height PCIe Device Driver"
depends on PCI
select CRC32
help
Device driver for IBM's high speed PCIe SSD
storage device: Flash Adapter 900GB Full Height.
To compile this driver as a module, choose M here: the
module will be called rsxx.
source "drivers/block/rnbd/Kconfig"
endif # BLK_DEV
drivers/block/Makefile
View file @ 3427f2b2
......@@ -34,7 +34,6 @@ obj-$(CONFIG_BLK_DEV_DRBD) += drbd/
obj-$(CONFIG_BLK_DEV_RBD) += rbd.o
obj-$(CONFIG_BLK_DEV_PCIESSD_MTIP32XX) += mtip32xx/
obj-$(CONFIG_BLK_DEV_RSXX) += rsxx/
obj-$(CONFIG_ZRAM) += zram/
obj-$(CONFIG_BLK_DEV_RNBD) += rnbd/
......
drivers/block/rsxx/Makefile deleted 100644 → 0
View file @ ac6f6548
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_BLK_DEV_RSXX) += rsxx.o
rsxx-objs := config.o core.o cregs.o dev.o dma.o
drivers/block/rsxx/config.c deleted 100644 → 0
View file @ ac6f6548
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Filename: config.c
*
* Authors: Joshua Morris <josh.h.morris@us.ibm.com>
* Philip Kelleher <pjk1939@linux.vnet.ibm.com>
*
* (C) Copyright 2013 IBM Corporation
*/
#include <linux/types.h>
#include <linux/crc32.h>
#include <linux/swab.h>
#include "rsxx_priv.h"
#include "rsxx_cfg.h"
static void initialize_config(struct rsxx_card_cfg *cfg)
{
cfg->hdr.version = RSXX_CFG_VERSION;
cfg->data.block_size = RSXX_HW_BLK_SIZE;
cfg->data.stripe_size = RSXX_HW_BLK_SIZE;
cfg->data.vendor_id = RSXX_VENDOR_ID_IBM;
cfg->data.cache_order = (-1);
cfg->data.intr_coal.mode = RSXX_INTR_COAL_DISABLED;
cfg->data.intr_coal.count = 0;
cfg->data.intr_coal.latency = 0;
}
static u32 config_data_crc32(struct rsxx_card_cfg *cfg)
{
/*
* Return the compliment of the CRC to ensure compatibility
* (i.e. this is how early rsxx drivers did it.)
*/
return ~crc32(~0, &cfg->data, sizeof(cfg->data));
}
/*----------------- Config Byte Swap Functions -------------------*/
static void config_hdr_be_to_cpu(struct card_cfg_hdr *hdr)
{
hdr->version = be32_to_cpu((__force __be32) hdr->version);
hdr->crc = be32_to_cpu((__force __be32) hdr->crc);
}
static void config_hdr_cpu_to_be(struct card_cfg_hdr *hdr)
{
hdr->version = (__force u32) cpu_to_be32(hdr->version);
hdr->crc = (__force u32) cpu_to_be32(hdr->crc);
}
static void config_data_swab(struct rsxx_card_cfg *cfg)
{
u32 *data = (u32 *) &cfg->data;
int i;
for (i = 0; i < (sizeof(cfg->data) / 4); i++)
data[i] = swab32(data[i]);
}
static void config_data_le_to_cpu(struct rsxx_card_cfg *cfg)
{
u32 *data = (u32 *) &cfg->data;
int i;
for (i = 0; i < (sizeof(cfg->data) / 4); i++)
data[i] = le32_to_cpu((__force __le32) data[i]);
}
static void config_data_cpu_to_le(struct rsxx_card_cfg *cfg)
{
u32 *data = (u32 *) &cfg->data;
int i;
for (i = 0; i < (sizeof(cfg->data) / 4); i++)
data[i] = (__force u32) cpu_to_le32(data[i]);
}
/*----------------- Config Operations ------------------*/
static int rsxx_save_config(struct rsxx_cardinfo *card)
{
struct rsxx_card_cfg cfg;
int st;
memcpy(&cfg, &card->config, sizeof(cfg));
if (unlikely(cfg.hdr.version != RSXX_CFG_VERSION)) {
dev_err(CARD_TO_DEV(card),
"Cannot save config with invalid version %d\n",
cfg.hdr.version);
return -EINVAL;
}
/* Convert data to little endian for the CRC calculation. */
config_data_cpu_to_le(&cfg);
cfg.hdr.crc = config_data_crc32(&cfg);
/*
* Swap the data from little endian to big endian so it can be
* stored.
*/
config_data_swab(&cfg);
config_hdr_cpu_to_be(&cfg.hdr);
st = rsxx_creg_write(card, CREG_ADD_CONFIG, sizeof(cfg), &cfg, 1);
if (st)
return st;
return 0;
}
int rsxx_load_config(struct rsxx_cardinfo *card)
{
int st;
u32 crc;
st = rsxx_creg_read(card, CREG_ADD_CONFIG, sizeof(card->config),
&card->config, 1);
if (st) {
dev_err(CARD_TO_DEV(card),
"Failed reading card config.\n");
return st;
}
config_hdr_be_to_cpu(&card->config.hdr);
if (card->config.hdr.version == RSXX_CFG_VERSION) {
/*
* We calculate the CRC with the data in little endian, because
* early drivers did not take big endian CPUs into account.
* The data is always stored in big endian, so we need to byte
* swap it before calculating the CRC.
*/
config_data_swab(&card->config);
/* Check the CRC */
crc = config_data_crc32(&card->config);
if (crc != card->config.hdr.crc) {
dev_err(CARD_TO_DEV(card),
"Config corruption detected!\n");
dev_info(CARD_TO_DEV(card),
"CRC (sb x%08x is x%08x)\n",
card->config.hdr.crc, crc);
return -EIO;
}
/* Convert the data to CPU byteorder */
config_data_le_to_cpu(&card->config);
} else if (card->config.hdr.version != 0) {
dev_err(CARD_TO_DEV(card),
"Invalid config version %d.\n",
card->config.hdr.version);
/*
* Config version changes require special handling from the
* user
*/
return -EINVAL;
} else {
dev_info(CARD_TO_DEV(card),
"Initializing card configuration.\n");
initialize_config(&card->config);
st = rsxx_save_config(card);
if (st)
return st;
}
card->config_valid = 1;
dev_dbg(CARD_TO_DEV(card), "version: x%08x\n",
card->config.hdr.version);
dev_dbg(CARD_TO_DEV(card), "crc: x%08x\n",
card->config.hdr.crc);
dev_dbg(CARD_TO_DEV(card), "block_size: x%08x\n",
card->config.data.block_size);
dev_dbg(CARD_TO_DEV(card), "stripe_size: x%08x\n",
card->config.data.stripe_size);
dev_dbg(CARD_TO_DEV(card), "vendor_id: x%08x\n",
card->config.data.vendor_id);
dev_dbg(CARD_TO_DEV(card), "cache_order: x%08x\n",
card->config.data.cache_order);
dev_dbg(CARD_TO_DEV(card), "mode: x%08x\n",
card->config.data.intr_coal.mode);
dev_dbg(CARD_TO_DEV(card), "count: x%08x\n",
card->config.data.intr_coal.count);
dev_dbg(CARD_TO_DEV(card), "latency: x%08x\n",
card->config.data.intr_coal.latency);
return 0;
}
drivers/block/rsxx/core.c deleted 100644 → 0
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drivers/block/rsxx/cregs.c deleted 100644 → 0
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This diff is collapsed.
drivers/block/rsxx/dev.c deleted 100644 → 0
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// 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);
}
drivers/block/rsxx/dma.c deleted 100644 → 0
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drivers/block/rsxx/rsxx.h deleted 100644 → 0
View file @ ac6f6548
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Filename: rsxx.h
*
* Authors: Joshua Morris <josh.h.morris@us.ibm.com>
* Philip Kelleher <pjk1939@linux.vnet.ibm.com>
*
* (C) Copyright 2013 IBM Corporation
*/
#ifndef __RSXX_H__
#define __RSXX_H__
/*----------------- IOCTL Definitions -------------------*/
#define RSXX_MAX_DATA 8
struct rsxx_reg_access {
__u32 addr;
__u32 cnt;
__u32 stat;
__u32 stream;
__u32 data[RSXX_MAX_DATA];
};
#define RSXX_MAX_REG_CNT (RSXX_MAX_DATA * (sizeof(__u32)))
#define RSXX_IOC_MAGIC 'r'
#define RSXX_GETREG _IOWR(RSXX_IOC_MAGIC, 0x20, struct rsxx_reg_access)
#define RSXX_SETREG _IOWR(RSXX_IOC_MAGIC, 0x21, struct rsxx_reg_access)
#endif /* __RSXX_H_ */
drivers/block/rsxx/rsxx_cfg.h deleted 100644 → 0
View file @ ac6f6548
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Filename: rsXX_cfg.h
*
* Authors: Joshua Morris <josh.h.morris@us.ibm.com>
* Philip Kelleher <pjk1939@linux.vnet.ibm.com>
*
* (C) Copyright 2013 IBM Corporation
*/
#ifndef __RSXX_CFG_H__
#define __RSXX_CFG_H__
/* NOTE: Config values will be saved in network byte order (i.e. Big endian) */
#include <linux/types.h>
/*
* The card config version must match the driver's expected version. If it does
* not, the DMA interfaces will not be attached and the user will need to
* initialize/upgrade the card configuration using the card config utility.
*/
#define RSXX_CFG_VERSION 4
struct card_cfg_hdr {
__u32 version;
__u32 crc;
};
struct card_cfg_data {
__u32 block_size;
__u32 stripe_size;
__u32 vendor_id;
__u32 cache_order;
struct {
__u32 mode; /* Disabled, manual, auto-tune... */
__u32 count; /* Number of intr to coalesce */
__u32 latency;/* Max wait time (in ns) */
} intr_coal;
};
struct rsxx_card_cfg {
struct card_cfg_hdr hdr;
struct card_cfg_data data;
};
/* Vendor ID Values */
#define RSXX_VENDOR_ID_IBM 0
#define RSXX_VENDOR_ID_DSI 1
#define RSXX_VENDOR_COUNT 2
/* Interrupt Coalescing Values */
#define RSXX_INTR_COAL_DISABLED 0
#define RSXX_INTR_COAL_EXPLICIT 1
#define RSXX_INTR_COAL_AUTO_TUNE 2
#endif /* __RSXX_CFG_H__ */
drivers/block/rsxx/rsxx_priv.h deleted 100644 → 0
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