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From: Davidlohr Bueso <dave@stgolabs.net>
To: axboe@kernel.dk
Cc: dave@stgolabs.net, dbueso@suse.de, hch@infradead.org,
	linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] drivers/block: Goodbye BLK_DEV_UMEM
Date: Tue, 23 Mar 2021 12:07:10 -0700
Message-ID: <20210323190710.101888-1-dave@stgolabs.net> (raw)
In-Reply-To: <0d26434e-36e2-58f2-16b4-ef0fa4292c6e@kernel.dk>

This removes the driver on the premise that it has been unused for a long
time. This is a better approach compared to changing untestable code nobody
cares about in the first place. Similarly, the umem.com website now shows a
mere Godaddy parking add.

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
---
 arch/mips/configs/malta_defconfig       |    1 -
 arch/mips/configs/malta_kvm_defconfig   |    1 -
 arch/mips/configs/maltaup_xpa_defconfig |    1 -
 drivers/block/Kconfig                   |   17 -
 drivers/block/Makefile                  |    1 -
 drivers/block/umem.c                    | 1130 -----------------------
 drivers/block/umem.h                    |  132 ---
 7 files changed, 1283 deletions(-)
 delete mode 100644 drivers/block/umem.c
 delete mode 100644 drivers/block/umem.h

diff --git a/arch/mips/configs/malta_defconfig b/arch/mips/configs/malta_defconfig
index 211bd3d6e6cb..9cb2cf2595e0 100644
--- a/arch/mips/configs/malta_defconfig
+++ b/arch/mips/configs/malta_defconfig
@@ -227,7 +227,6 @@ CONFIG_MTD_PHYSMAP_OF=y
 CONFIG_MTD_UBI=m
 CONFIG_MTD_UBI_GLUEBI=m
 CONFIG_BLK_DEV_FD=m
-CONFIG_BLK_DEV_UMEM=m
 CONFIG_BLK_DEV_LOOP=m
 CONFIG_BLK_DEV_CRYPTOLOOP=m
 CONFIG_BLK_DEV_NBD=m
diff --git a/arch/mips/configs/malta_kvm_defconfig b/arch/mips/configs/malta_kvm_defconfig
index 62b1969b4f55..ab8d1df0f255 100644
--- a/arch/mips/configs/malta_kvm_defconfig
+++ b/arch/mips/configs/malta_kvm_defconfig
@@ -232,7 +232,6 @@ CONFIG_MTD_PHYSMAP_OF=y
 CONFIG_MTD_UBI=m
 CONFIG_MTD_UBI_GLUEBI=m
 CONFIG_BLK_DEV_FD=m
-CONFIG_BLK_DEV_UMEM=m
 CONFIG_BLK_DEV_LOOP=m
 CONFIG_BLK_DEV_CRYPTOLOOP=m
 CONFIG_BLK_DEV_NBD=m
diff --git a/arch/mips/configs/maltaup_xpa_defconfig b/arch/mips/configs/maltaup_xpa_defconfig
index 636311d67a53..c93e5a39c215 100644
--- a/arch/mips/configs/maltaup_xpa_defconfig
+++ b/arch/mips/configs/maltaup_xpa_defconfig
@@ -230,7 +230,6 @@ CONFIG_MTD_PHYSMAP_OF=y
 CONFIG_MTD_UBI=m
 CONFIG_MTD_UBI_GLUEBI=m
 CONFIG_BLK_DEV_FD=m
-CONFIG_BLK_DEV_UMEM=m
 CONFIG_BLK_DEV_LOOP=m
 CONFIG_BLK_DEV_CRYPTOLOOP=m
 CONFIG_BLK_DEV_NBD=m
diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig
index fd236158f32d..56e7b8450120 100644
--- a/drivers/block/Kconfig
+++ b/drivers/block/Kconfig
@@ -121,23 +121,6 @@ source "drivers/block/mtip32xx/Kconfig"
 
 source "drivers/block/zram/Kconfig"
 
-config BLK_DEV_UMEM
-	tristate "Micro Memory MM5415 Battery Backed RAM support"
-	depends on PCI
-	help
-	  Saying Y here will include support for the MM5415 family of
-	  battery backed (Non-volatile) RAM cards.
-	  <http://www.umem.com/>
-
-	  The cards appear as block devices that can be partitioned into
-	  as many as 15 partitions.
-
-	  To compile this driver as a module, choose M here: the
-	  module will be called umem.
-
-	  The umem driver has not yet been allocated a MAJOR number, so
-	  one is chosen dynamically.
-
 config BLK_DEV_UBD
 	bool "Virtual block device"
 	depends on UML
diff --git a/drivers/block/Makefile b/drivers/block/Makefile
index e3e3f1c79a82..9878eb3dbfd5 100644
--- a/drivers/block/Makefile
+++ b/drivers/block/Makefile
@@ -24,7 +24,6 @@ obj-$(CONFIG_XILINX_SYSACE)	+= xsysace.o
 obj-$(CONFIG_CDROM_PKTCDVD)	+= pktcdvd.o
 obj-$(CONFIG_SUNVDC)		+= sunvdc.o
 
-obj-$(CONFIG_BLK_DEV_UMEM)	+= umem.o
 obj-$(CONFIG_BLK_DEV_NBD)	+= nbd.o
 obj-$(CONFIG_BLK_DEV_CRYPTOLOOP) += cryptoloop.o
 obj-$(CONFIG_VIRTIO_BLK)	+= virtio_blk.o
diff --git a/drivers/block/umem.c b/drivers/block/umem.c
deleted file mode 100644
index 664280f23bee..000000000000
--- a/drivers/block/umem.c
+++ /dev/null
@@ -1,1130 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * mm.c - Micro Memory(tm) PCI memory board block device driver - v2.3
- *
- * (C) 2001 San Mehat <nettwerk@valinux.com>
- * (C) 2001 Johannes Erdfelt <jerdfelt@valinux.com>
- * (C) 2001 NeilBrown <neilb@cse.unsw.edu.au>
- *
- * This driver for the Micro Memory PCI Memory Module with Battery Backup
- * is Copyright Micro Memory Inc 2001-2002.  All rights reserved.
- *
- * This driver provides a standard block device interface for Micro Memory(tm)
- * PCI based RAM boards.
- * 10/05/01: Phap Nguyen - Rebuilt the driver
- * 10/22/01: Phap Nguyen - v2.1 Added disk partitioning
- * 29oct2001:NeilBrown   - Use make_request_fn instead of request_fn
- *                       - use stand disk partitioning (so fdisk works).
- * 08nov2001:NeilBrown	 - change driver name from "mm" to "umem"
- *			 - incorporate into main kernel
- * 08apr2002:NeilBrown   - Move some of interrupt handle to tasklet
- *			 - use spin_lock_bh instead of _irq
- *			 - Never block on make_request.  queue
- *			   bh's instead.
- *			 - unregister umem from devfs at mod unload
- *			 - Change version to 2.3
- * 07Nov2001:Phap Nguyen - Select pci read command: 06, 12, 15 (Decimal)
- * 07Jan2002: P. Nguyen  - Used PCI Memory Write & Invalidate for DMA
- * 15May2002:NeilBrown   - convert to bio for 2.5
- * 17May2002:NeilBrown   - remove init_mem initialisation.  Instead detect
- *			 - a sequence of writes that cover the card, and
- *			 - set initialised bit then.
- */
-
-#undef DEBUG	/* #define DEBUG if you want debugging info (pr_debug) */
-#include <linux/fs.h>
-#include <linux/bio.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/gfp.h>
-#include <linux/ioctl.h>
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/interrupt.h>
-#include <linux/timer.h>
-#include <linux/pci.h>
-#include <linux/dma-mapping.h>
-
-#include <linux/fcntl.h>        /* O_ACCMODE */
-#include <linux/hdreg.h>  /* HDIO_GETGEO */
-
-#include "umem.h"
-
-#include <linux/uaccess.h>
-#include <asm/io.h>
-
-#define MM_MAXCARDS 4
-#define MM_RAHEAD 2      /* two sectors */
-#define MM_BLKSIZE 1024  /* 1k blocks */
-#define MM_HARDSECT 512  /* 512-byte hardware sectors */
-#define MM_SHIFT 6       /* max 64 partitions on 4 cards  */
-
-/*
- * Version Information
- */
-
-#define DRIVER_NAME	"umem"
-#define DRIVER_VERSION	"v2.3"
-#define DRIVER_AUTHOR	"San Mehat, Johannes Erdfelt, NeilBrown"
-#define DRIVER_DESC	"Micro Memory(tm) PCI memory board block driver"
-
-static int debug;
-/* #define HW_TRACE(x)     writeb(x,cards[0].csr_remap + MEMCTRLSTATUS_MAGIC) */
-#define HW_TRACE(x)
-
-#define DEBUG_LED_ON_TRANSFER	0x01
-#define DEBUG_BATTERY_POLLING	0x02
-
-module_param(debug, int, 0644);
-MODULE_PARM_DESC(debug, "Debug bitmask");
-
-static int pci_read_cmd = 0x0C;		/* Read Multiple */
-module_param(pci_read_cmd, int, 0);
-MODULE_PARM_DESC(pci_read_cmd, "PCI read command");
-
-static int pci_write_cmd = 0x0F;	/* Write and Invalidate */
-module_param(pci_write_cmd, int, 0);
-MODULE_PARM_DESC(pci_write_cmd, "PCI write command");
-
-static int pci_cmds;
-
-static int major_nr;
-
-#include <linux/blkdev.h>
-#include <linux/blkpg.h>
-
-struct cardinfo {
-	struct pci_dev	*dev;
-
-	unsigned char	__iomem *csr_remap;
-	unsigned int	mm_size;  /* size in kbytes */
-
-	unsigned int	init_size; /* initial segment, in sectors,
-				    * that we know to
-				    * have been written
-				    */
-	struct bio	*bio, *currentbio, **biotail;
-	struct bvec_iter current_iter;
-
-	struct request_queue *queue;
-
-	struct mm_page {
-		dma_addr_t		page_dma;
-		struct mm_dma_desc	*desc;
-		int	 		cnt, headcnt;
-		struct bio		*bio, **biotail;
-		struct bvec_iter	iter;
-	} mm_pages[2];
-#define DESC_PER_PAGE ((PAGE_SIZE*2)/sizeof(struct mm_dma_desc))
-
-	int  Active, Ready;
-
-	struct tasklet_struct	tasklet;
-	unsigned int dma_status;
-
-	struct {
-		int		good;
-		int		warned;
-		unsigned long	last_change;
-	} battery[2];
-
-	spinlock_t 	lock;
-	int		check_batteries;
-
-	int		flags;
-};
-
-static struct cardinfo cards[MM_MAXCARDS];
-static struct timer_list battery_timer;
-
-static int num_cards;
-
-static struct gendisk *mm_gendisk[MM_MAXCARDS];
-
-static void check_batteries(struct cardinfo *card);
-
-static int get_userbit(struct cardinfo *card, int bit)
-{
-	unsigned char led;
-
-	led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
-	return led & bit;
-}
-
-static int set_userbit(struct cardinfo *card, int bit, unsigned char state)
-{
-	unsigned char led;
-
-	led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
-	if (state)
-		led |= bit;
-	else
-		led &= ~bit;
-	writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL);
-
-	return 0;
-}
-
-/*
- * NOTE: For the power LED, use the LED_POWER_* macros since they differ
- */
-static void set_led(struct cardinfo *card, int shift, unsigned char state)
-{
-	unsigned char led;
-
-	led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL);
-	if (state == LED_FLIP)
-		led ^= (1<<shift);
-	else {
-		led &= ~(0x03 << shift);
-		led |= (state << shift);
-	}
-	writeb(led, card->csr_remap + MEMCTRLCMD_LEDCTRL);
-
-}
-
-#ifdef MM_DIAG
-static void dump_regs(struct cardinfo *card)
-{
-	unsigned char *p;
-	int i, i1;
-
-	p = card->csr_remap;
-	for (i = 0; i < 8; i++) {
-		printk(KERN_DEBUG "%p   ", p);
-
-		for (i1 = 0; i1 < 16; i1++)
-			printk("%02x ", *p++);
-
-		printk("\n");
-	}
-}
-#endif
-
-static void dump_dmastat(struct cardinfo *card, unsigned int dmastat)
-{
-	dev_printk(KERN_DEBUG, &card->dev->dev, "DMAstat - ");
-	if (dmastat & DMASCR_ANY_ERR)
-		printk(KERN_CONT "ANY_ERR ");
-	if (dmastat & DMASCR_MBE_ERR)
-		printk(KERN_CONT "MBE_ERR ");
-	if (dmastat & DMASCR_PARITY_ERR_REP)
-		printk(KERN_CONT "PARITY_ERR_REP ");
-	if (dmastat & DMASCR_PARITY_ERR_DET)
-		printk(KERN_CONT "PARITY_ERR_DET ");
-	if (dmastat & DMASCR_SYSTEM_ERR_SIG)
-		printk(KERN_CONT "SYSTEM_ERR_SIG ");
-	if (dmastat & DMASCR_TARGET_ABT)
-		printk(KERN_CONT "TARGET_ABT ");
-	if (dmastat & DMASCR_MASTER_ABT)
-		printk(KERN_CONT "MASTER_ABT ");
-	if (dmastat & DMASCR_CHAIN_COMPLETE)
-		printk(KERN_CONT "CHAIN_COMPLETE ");
-	if (dmastat & DMASCR_DMA_COMPLETE)
-		printk(KERN_CONT "DMA_COMPLETE ");
-	printk("\n");
-}
-
-/*
- * Theory of request handling
- *
- * Each bio is assigned to one mm_dma_desc - which may not be enough FIXME
- * We have two pages of mm_dma_desc, holding about 64 descriptors
- * each.  These are allocated at init time.
- * One page is "Ready" and is either full, or can have request added.
- * The other page might be "Active", which DMA is happening on it.
- *
- * Whenever IO on the active page completes, the Ready page is activated
- * and the ex-Active page is clean out and made Ready.
- * Otherwise the Ready page is only activated when it becomes full.
- *
- * If a request arrives while both pages a full, it is queued, and b_rdev is
- * overloaded to record whether it was a read or a write.
- *
- * The interrupt handler only polls the device to clear the interrupt.
- * The processing of the result is done in a tasklet.
- */
-
-static void mm_start_io(struct cardinfo *card)
-{
-	/* we have the lock, we know there is
-	 * no IO active, and we know that card->Active
-	 * is set
-	 */
-	struct mm_dma_desc *desc;
-	struct mm_page *page;
-	int offset;
-
-	/* make the last descriptor end the chain */
-	page = &card->mm_pages[card->Active];
-	pr_debug("start_io: %d %d->%d\n",
-		card->Active, page->headcnt, page->cnt - 1);
-	desc = &page->desc[page->cnt-1];
-
-	desc->control_bits |= cpu_to_le32(DMASCR_CHAIN_COMP_EN);
-	desc->control_bits &= ~cpu_to_le32(DMASCR_CHAIN_EN);
-	desc->sem_control_bits = desc->control_bits;
-
-
-	if (debug & DEBUG_LED_ON_TRANSFER)
-		set_led(card, LED_REMOVE, LED_ON);
-
-	desc = &page->desc[page->headcnt];
-	writel(0, card->csr_remap + DMA_PCI_ADDR);
-	writel(0, card->csr_remap + DMA_PCI_ADDR + 4);
-
-	writel(0, card->csr_remap + DMA_LOCAL_ADDR);
-	writel(0, card->csr_remap + DMA_LOCAL_ADDR + 4);
-
-	writel(0, card->csr_remap + DMA_TRANSFER_SIZE);
-	writel(0, card->csr_remap + DMA_TRANSFER_SIZE + 4);
-
-	writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR);
-	writel(0, card->csr_remap + DMA_SEMAPHORE_ADDR + 4);
-
-	offset = ((char *)desc) - ((char *)page->desc);
-	writel(cpu_to_le32((page->page_dma+offset) & 0xffffffff),
-	       card->csr_remap + DMA_DESCRIPTOR_ADDR);
-	/* Force the value to u64 before shifting otherwise >> 32 is undefined C
-	 * and on some ports will do nothing ! */
-	writel(cpu_to_le32(((u64)page->page_dma)>>32),
-	       card->csr_remap + DMA_DESCRIPTOR_ADDR + 4);
-
-	/* Go, go, go */
-	writel(cpu_to_le32(DMASCR_GO | DMASCR_CHAIN_EN | pci_cmds),
-	       card->csr_remap + DMA_STATUS_CTRL);
-}
-
-static int add_bio(struct cardinfo *card);
-
-static void activate(struct cardinfo *card)
-{
-	/* if No page is Active, and Ready is
-	 * not empty, then switch Ready page
-	 * to active and start IO.
-	 * Then add any bh's that are available to Ready
-	 */
-
-	do {
-		while (add_bio(card))
-			;
-
-		if (card->Active == -1 &&
-		    card->mm_pages[card->Ready].cnt > 0) {
-			card->Active = card->Ready;
-			card->Ready = 1-card->Ready;
-			mm_start_io(card);
-		}
-
-	} while (card->Active == -1 && add_bio(card));
-}
-
-static inline void reset_page(struct mm_page *page)
-{
-	page->cnt = 0;
-	page->headcnt = 0;
-	page->bio = NULL;
-	page->biotail = &page->bio;
-}
-
-/*
- * If there is room on Ready page, take
- * one bh off list and add it.
- * return 1 if there was room, else 0.
- */
-static int add_bio(struct cardinfo *card)
-{
-	struct mm_page *p;
-	struct mm_dma_desc *desc;
-	dma_addr_t dma_handle;
-	int offset;
-	struct bio *bio;
-	struct bio_vec vec;
-
-	bio = card->currentbio;
-	if (!bio && card->bio) {
-		card->currentbio = card->bio;
-		card->current_iter = card->bio->bi_iter;
-		card->bio = card->bio->bi_next;
-		if (card->bio == NULL)
-			card->biotail = &card->bio;
-		card->currentbio->bi_next = NULL;
-		return 1;
-	}
-	if (!bio)
-		return 0;
-
-	if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE)
-		return 0;
-
-	vec = bio_iter_iovec(bio, card->current_iter);
-
-	dma_handle = dma_map_page(&card->dev->dev,
-				  vec.bv_page,
-				  vec.bv_offset,
-				  vec.bv_len,
-				  bio_op(bio) == REQ_OP_READ ?
-				  DMA_FROM_DEVICE : DMA_TO_DEVICE);
-
-	p = &card->mm_pages[card->Ready];
-	desc = &p->desc[p->cnt];
-	p->cnt++;
-	if (p->bio == NULL)
-		p->iter = card->current_iter;
-	if ((p->biotail) != &bio->bi_next) {
-		*(p->biotail) = bio;
-		p->biotail = &(bio->bi_next);
-		bio->bi_next = NULL;
-	}
-
-	desc->data_dma_handle = dma_handle;
-
-	desc->pci_addr = cpu_to_le64((u64)desc->data_dma_handle);
-	desc->local_addr = cpu_to_le64(card->current_iter.bi_sector << 9);
-	desc->transfer_size = cpu_to_le32(vec.bv_len);
-	offset = (((char *)&desc->sem_control_bits) - ((char *)p->desc));
-	desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset));
-	desc->zero1 = desc->zero2 = 0;
-	offset = (((char *)(desc+1)) - ((char *)p->desc));
-	desc->next_desc_addr = cpu_to_le64(p->page_dma+offset);
-	desc->control_bits = cpu_to_le32(DMASCR_GO|DMASCR_ERR_INT_EN|
-					 DMASCR_PARITY_INT_EN|
-					 DMASCR_CHAIN_EN |
-					 DMASCR_SEM_EN |
-					 pci_cmds);
-	if (bio_op(bio) == REQ_OP_WRITE)
-		desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ);
-	desc->sem_control_bits = desc->control_bits;
-
-
-	bio_advance_iter(bio, &card->current_iter, vec.bv_len);
-	if (!card->current_iter.bi_size)
-		card->currentbio = NULL;
-
-	return 1;
-}
-
-static void process_page(unsigned long data)
-{
-	/* check if any of the requests in the page are DMA_COMPLETE,
-	 * and deal with them appropriately.
-	 * If we find a descriptor without DMA_COMPLETE in the semaphore, then
-	 * dma must have hit an error on that descriptor, so use dma_status
-	 * instead and assume that all following descriptors must be re-tried.
-	 */
-	struct mm_page *page;
-	struct bio *return_bio = NULL;
-	struct cardinfo *card = (struct cardinfo *)data;
-	unsigned int dma_status = card->dma_status;
-
-	spin_lock(&card->lock);
-	if (card->Active < 0)
-		goto out_unlock;
-	page = &card->mm_pages[card->Active];
-
-	while (page->headcnt < page->cnt) {
-		struct bio *bio = page->bio;
-		struct mm_dma_desc *desc = &page->desc[page->headcnt];
-		int control = le32_to_cpu(desc->sem_control_bits);
-		int last = 0;
-		struct bio_vec vec;
-
-		if (!(control & DMASCR_DMA_COMPLETE)) {
-			control = dma_status;
-			last = 1;
-		}
-
-		page->headcnt++;
-		vec = bio_iter_iovec(bio, page->iter);
-		bio_advance_iter(bio, &page->iter, vec.bv_len);
-
-		if (!page->iter.bi_size) {
-			page->bio = bio->bi_next;
-			if (page->bio)
-				page->iter = page->bio->bi_iter;
-		}
-
-		dma_unmap_page(&card->dev->dev, desc->data_dma_handle,
-			       vec.bv_len,
-				 (control & DMASCR_TRANSFER_READ) ?
-				DMA_TO_DEVICE : DMA_FROM_DEVICE);
-		if (control & DMASCR_HARD_ERROR) {
-			/* error */
-			bio->bi_status = BLK_STS_IOERR;
-			dev_printk(KERN_WARNING, &card->dev->dev,
-				"I/O error on sector %d/%d\n",
-				le32_to_cpu(desc->local_addr)>>9,
-				le32_to_cpu(desc->transfer_size));
-			dump_dmastat(card, control);
-		} else if (op_is_write(bio_op(bio)) &&
-			   le32_to_cpu(desc->local_addr) >> 9 ==
-				card->init_size) {
-			card->init_size += le32_to_cpu(desc->transfer_size) >> 9;
-			if (card->init_size >> 1 >= card->mm_size) {
-				dev_printk(KERN_INFO, &card->dev->dev,
-					"memory now initialised\n");
-				set_userbit(card, MEMORY_INITIALIZED, 1);
-			}
-		}
-		if (bio != page->bio) {
-			bio->bi_next = return_bio;
-			return_bio = bio;
-		}
-
-		if (last)
-			break;
-	}
-
-	if (debug & DEBUG_LED_ON_TRANSFER)
-		set_led(card, LED_REMOVE, LED_OFF);
-
-	if (card->check_batteries) {
-		card->check_batteries = 0;
-		check_batteries(card);
-	}
-	if (page->headcnt >= page->cnt) {
-		reset_page(page);
-		card->Active = -1;
-		activate(card);
-	} else {
-		/* haven't finished with this one yet */
-		pr_debug("do some more\n");
-		mm_start_io(card);
-	}
- out_unlock:
-	spin_unlock(&card->lock);
-
-	while (return_bio) {
-		struct bio *bio = return_bio;
-
-		return_bio = bio->bi_next;
-		bio->bi_next = NULL;
-		bio_endio(bio);
-	}
-}
-
-static void mm_unplug(struct blk_plug_cb *cb, bool from_schedule)
-{
-	struct cardinfo *card = cb->data;
-
-	spin_lock_irq(&card->lock);
-	activate(card);
-	spin_unlock_irq(&card->lock);
-	kfree(cb);
-}
-
-static int mm_check_plugged(struct cardinfo *card)
-{
-	return !!blk_check_plugged(mm_unplug, card, sizeof(struct blk_plug_cb));
-}
-
-static blk_qc_t mm_submit_bio(struct bio *bio)
-{
-	struct cardinfo *card = bio->bi_bdev->bd_disk->private_data;
-
-	pr_debug("mm_make_request %llu %u\n",
-		 (unsigned long long)bio->bi_iter.bi_sector,
-		 bio->bi_iter.bi_size);
-
-	blk_queue_split(&bio);
-
-	spin_lock_irq(&card->lock);
-	*card->biotail = bio;
-	bio->bi_next = NULL;
-	card->biotail = &bio->bi_next;
-	if (op_is_sync(bio->bi_opf) || !mm_check_plugged(card))
-		activate(card);
-	spin_unlock_irq(&card->lock);
-
-	return BLK_QC_T_NONE;
-}
-
-static irqreturn_t mm_interrupt(int irq, void *__card)
-{
-	struct cardinfo *card = (struct cardinfo *) __card;
-	unsigned int dma_status;
-	unsigned short cfg_status;
-
-HW_TRACE(0x30);
-
-	dma_status = le32_to_cpu(readl(card->csr_remap + DMA_STATUS_CTRL));
-
-	if (!(dma_status & (DMASCR_ERROR_MASK | DMASCR_CHAIN_COMPLETE))) {
-		/* interrupt wasn't for me ... */
-		return IRQ_NONE;
-	}
-
-	/* clear COMPLETION interrupts */
-	if (card->flags & UM_FLAG_NO_BYTE_STATUS)
-		writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE),
-		       card->csr_remap + DMA_STATUS_CTRL);
-	else
-		writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16,
-		       card->csr_remap + DMA_STATUS_CTRL + 2);
-
-	/* log errors and clear interrupt status */
-	if (dma_status & DMASCR_ANY_ERR) {
-		unsigned int	data_log1, data_log2;
-		unsigned int	addr_log1, addr_log2;
-		unsigned char	stat, count, syndrome, check;
-
-		stat = readb(card->csr_remap + MEMCTRLCMD_ERRSTATUS);
-
-		data_log1 = le32_to_cpu(readl(card->csr_remap +
-						ERROR_DATA_LOG));
-		data_log2 = le32_to_cpu(readl(card->csr_remap +
-						ERROR_DATA_LOG + 4));
-		addr_log1 = le32_to_cpu(readl(card->csr_remap +
-						ERROR_ADDR_LOG));
-		addr_log2 = readb(card->csr_remap + ERROR_ADDR_LOG + 4);
-
-		count = readb(card->csr_remap + ERROR_COUNT);
-		syndrome = readb(card->csr_remap + ERROR_SYNDROME);
-		check = readb(card->csr_remap + ERROR_CHECK);
-
-		dump_dmastat(card, dma_status);
-
-		if (stat & 0x01)
-			dev_printk(KERN_ERR, &card->dev->dev,
-				"Memory access error detected (err count %d)\n",
-				count);
-		if (stat & 0x02)
-			dev_printk(KERN_ERR, &card->dev->dev,
-				"Multi-bit EDC error\n");
-
-		dev_printk(KERN_ERR, &card->dev->dev,
-			"Fault Address 0x%02x%08x, Fault Data 0x%08x%08x\n",
-			addr_log2, addr_log1, data_log2, data_log1);
-		dev_printk(KERN_ERR, &card->dev->dev,
-			"Fault Check 0x%02x, Fault Syndrome 0x%02x\n",
-			check, syndrome);
-
-		writeb(0, card->csr_remap + ERROR_COUNT);
-	}
-
-	if (dma_status & DMASCR_PARITY_ERR_REP) {
-		dev_printk(KERN_ERR, &card->dev->dev,
-			"PARITY ERROR REPORTED\n");
-		pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
-		pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
-	}
-
-	if (dma_status & DMASCR_PARITY_ERR_DET) {
-		dev_printk(KERN_ERR, &card->dev->dev,
-			"PARITY ERROR DETECTED\n");
-		pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
-		pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
-	}
-
-	if (dma_status & DMASCR_SYSTEM_ERR_SIG) {
-		dev_printk(KERN_ERR, &card->dev->dev, "SYSTEM ERROR\n");
-		pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
-		pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
-	}
-
-	if (dma_status & DMASCR_TARGET_ABT) {
-		dev_printk(KERN_ERR, &card->dev->dev, "TARGET ABORT\n");
-		pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
-		pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
-	}
-
-	if (dma_status & DMASCR_MASTER_ABT) {
-		dev_printk(KERN_ERR, &card->dev->dev, "MASTER ABORT\n");
-		pci_read_config_word(card->dev, PCI_STATUS, &cfg_status);
-		pci_write_config_word(card->dev, PCI_STATUS, cfg_status);
-	}
-
-	/* and process the DMA descriptors */
-	card->dma_status = dma_status;
-	tasklet_schedule(&card->tasklet);
-
-HW_TRACE(0x36);
-
-	return IRQ_HANDLED;
-}
-
-/*
- * If both batteries are good, no LED
- * If either battery has been warned, solid LED
- * If both batteries are bad, flash the LED quickly
- * If either battery is bad, flash the LED semi quickly
- */
-static void set_fault_to_battery_status(struct cardinfo *card)
-{
-	if (card->battery[0].good && card->battery[1].good)
-		set_led(card, LED_FAULT, LED_OFF);
-	else if (card->battery[0].warned || card->battery[1].warned)
-		set_led(card, LED_FAULT, LED_ON);
-	else if (!card->battery[0].good && !card->battery[1].good)
-		set_led(card, LED_FAULT, LED_FLASH_7_0);
-	else
-		set_led(card, LED_FAULT, LED_FLASH_3_5);
-}
-
-static void init_battery_timer(void);
-
-static int check_battery(struct cardinfo *card, int battery, int status)
-{
-	if (status != card->battery[battery].good) {
-		card->battery[battery].good = !card->battery[battery].good;
-		card->battery[battery].last_change = jiffies;
-
-		if (card->battery[battery].good) {
-			dev_printk(KERN_ERR, &card->dev->dev,
-				"Battery %d now good\n", battery + 1);
-			card->battery[battery].warned = 0;
-		} else
-			dev_printk(KERN_ERR, &card->dev->dev,
-				"Battery %d now FAILED\n", battery + 1);
-
-		return 1;
-	} else if (!card->battery[battery].good &&
-		   !card->battery[battery].warned &&
-		   time_after_eq(jiffies, card->battery[battery].last_change +
-				 (HZ * 60 * 60 * 5))) {
-		dev_printk(KERN_ERR, &card->dev->dev,
-			"Battery %d still FAILED after 5 hours\n", battery + 1);
-		card->battery[battery].warned = 1;
-
-		return 1;
-	}
-
-	return 0;
-}
-
-static void check_batteries(struct cardinfo *card)
-{
-	/* NOTE: this must *never* be called while the card
-	 * is doing (bus-to-card) DMA, or you will need the
-	 * reset switch
-	 */
-	unsigned char status;
-	int ret1, ret2;
-
-	status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
-	if (debug & DEBUG_BATTERY_POLLING)
-		dev_printk(KERN_DEBUG, &card->dev->dev,
-			"checking battery status, 1 = %s, 2 = %s\n",
-		       (status & BATTERY_1_FAILURE) ? "FAILURE" : "OK",
-		       (status & BATTERY_2_FAILURE) ? "FAILURE" : "OK");
-
-	ret1 = check_battery(card, 0, !(status & BATTERY_1_FAILURE));
-	ret2 = check_battery(card, 1, !(status & BATTERY_2_FAILURE));
-
-	if (ret1 || ret2)
-		set_fault_to_battery_status(card);
-}
-
-static void check_all_batteries(struct timer_list *unused)
-{
-	int i;
-
-	for (i = 0; i < num_cards; i++)
-		if (!(cards[i].flags & UM_FLAG_NO_BATT)) {
-			struct cardinfo *card = &cards[i];
-			spin_lock_bh(&card->lock);
-			if (card->Active >= 0)
-				card->check_batteries = 1;
-			else
-				check_batteries(card);
-			spin_unlock_bh(&card->lock);
-		}
-
-	init_battery_timer();
-}
-
-static void init_battery_timer(void)
-{
-	timer_setup(&battery_timer, check_all_batteries, 0);
-	battery_timer.expires = jiffies + (HZ * 60);
-	add_timer(&battery_timer);
-}
-
-static void del_battery_timer(void)
-{
-	del_timer(&battery_timer);
-}
-
-/*
- * Note no locks taken out here.  In a worst case scenario, we could drop
- * a chunk of system memory.  But that should never happen, since validation
- * happens at open or mount time, when locks are held.
- *
- *	That's crap, since doing that while some partitions are opened
- * or mounted will give you really nasty results.
- */
-static int mm_revalidate(struct gendisk *disk)
-{
-	struct cardinfo *card = disk->private_data;
-	set_capacity(disk, card->mm_size << 1);
-	return 0;
-}
-
-static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo)
-{
-	struct cardinfo *card = bdev->bd_disk->private_data;
-	int size = card->mm_size * (1024 / MM_HARDSECT);
-
-	/*
-	 * get geometry: we have to fake one...  trim the size to a
-	 * multiple of 2048 (1M): tell we have 32 sectors, 64 heads,
-	 * whatever cylinders.
-	 */
-	geo->heads     = 64;
-	geo->sectors   = 32;
-	geo->cylinders = size / (geo->heads * geo->sectors);
-	return 0;
-}
-
-static const struct block_device_operations mm_fops = {
-	.owner		= THIS_MODULE,
-	.submit_bio	= mm_submit_bio,
-	.getgeo		= mm_getgeo,
-	.revalidate_disk = mm_revalidate,
-};
-
-static int mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
-{
-	int ret;
-	struct cardinfo *card = &cards[num_cards];
-	unsigned char	mem_present;
-	unsigned char	batt_status;
-	unsigned int	saved_bar, data;
-	unsigned long	csr_base;
-	unsigned long	csr_len;
-	int		magic_number;
-	static int	printed_version;
-
-	if (!printed_version++)
-		printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC "\n");
-
-	ret = pci_enable_device(dev);
-	if (ret)
-		return ret;
-
-	pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8);
-	pci_set_master(dev);
-
-	card->dev         = dev;
-
-	csr_base = pci_resource_start(dev, 0);
-	csr_len  = pci_resource_len(dev, 0);
-	if (!csr_base || !csr_len)
-		return -ENODEV;
-
-	dev_printk(KERN_INFO, &dev->dev,
-	  "Micro Memory(tm) controller found (PCI Mem Module (Battery Backup))\n");
-
-	if (dma_set_mask(&dev->dev, DMA_BIT_MASK(64)) &&
-	    dma_set_mask(&dev->dev, DMA_BIT_MASK(32))) {
-		dev_printk(KERN_WARNING, &dev->dev, "NO suitable DMA found\n");
-		return  -ENOMEM;
-	}
-
-	ret = pci_request_regions(dev, DRIVER_NAME);
-	if (ret) {
-		dev_printk(KERN_ERR, &card->dev->dev,
-			"Unable to request memory region\n");
-		goto failed_req_csr;
-	}
-
-	card->csr_remap = ioremap(csr_base, csr_len);
-	if (!card->csr_remap) {
-		dev_printk(KERN_ERR, &card->dev->dev,
-			"Unable to remap memory region\n");
-		ret = -ENOMEM;
-
-		goto failed_remap_csr;
-	}
-
-	dev_printk(KERN_INFO, &card->dev->dev,
-		"CSR 0x%08lx -> 0x%p (0x%lx)\n",
-	       csr_base, card->csr_remap, csr_len);
-
-	switch (card->dev->device) {
-	case 0x5415:
-		card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG;
-		magic_number = 0x59;
-		break;
-
-	case 0x5425:
-		card->flags |= UM_FLAG_NO_BYTE_STATUS;
-		magic_number = 0x5C;
-		break;
-
-	case 0x6155:
-		card->flags |= UM_FLAG_NO_BYTE_STATUS |
-				UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT;
-		magic_number = 0x99;
-		break;
-
-	default:
-		magic_number = 0x100;
-		break;
-	}
-
-	if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) {
-		dev_printk(KERN_ERR, &card->dev->dev, "Magic number invalid\n");
-		ret = -ENOMEM;
-		goto failed_magic;
-	}
-
-	card->mm_pages[0].desc = dma_alloc_coherent(&card->dev->dev,
-			PAGE_SIZE * 2, &card->mm_pages[0].page_dma, GFP_KERNEL);
-	card->mm_pages[1].desc = dma_alloc_coherent(&card->dev->dev,
-			PAGE_SIZE * 2, &card->mm_pages[1].page_dma, GFP_KERNEL);
-	if (card->mm_pages[0].desc == NULL ||
-	    card->mm_pages[1].desc == NULL) {
-		dev_printk(KERN_ERR, &card->dev->dev, "alloc failed\n");
-		ret = -ENOMEM;
-		goto failed_alloc;
-	}
-	reset_page(&card->mm_pages[0]);
-	reset_page(&card->mm_pages[1]);
-	card->Ready = 0;	/* page 0 is ready */
-	card->Active = -1;	/* no page is active */
-	card->bio = NULL;
-	card->biotail = &card->bio;
-	spin_lock_init(&card->lock);
-
-	card->queue = blk_alloc_queue(NUMA_NO_NODE);
-	if (!card->queue) {
-		ret = -ENOMEM;
-		goto failed_alloc;
-	}
-
-	tasklet_init(&card->tasklet, process_page, (unsigned long)card);
-
-	card->check_batteries = 0;
-
-	mem_present = readb(card->csr_remap + MEMCTRLSTATUS_MEMORY);
-	switch (mem_present) {
-	case MEM_128_MB:
-		card->mm_size = 1024 * 128;
-		break;
-	case MEM_256_MB:
-		card->mm_size = 1024 * 256;
-		break;
-	case MEM_512_MB:
-		card->mm_size = 1024 * 512;
-		break;
-	case MEM_1_GB:
-		card->mm_size = 1024 * 1024;
-		break;
-	case MEM_2_GB:
-		card->mm_size = 1024 * 2048;
-		break;
-	default:
-		card->mm_size = 0;
-		break;
-	}
-
-	/* Clear the LED's we control */
-	set_led(card, LED_REMOVE, LED_OFF);
-	set_led(card, LED_FAULT, LED_OFF);
-
-	batt_status = readb(card->csr_remap + MEMCTRLSTATUS_BATTERY);
-
-	card->battery[0].good = !(batt_status & BATTERY_1_FAILURE);
-	card->battery[1].good = !(batt_status & BATTERY_2_FAILURE);
-	card->battery[0].last_change = card->battery[1].last_change = jiffies;
-
-	if (card->flags & UM_FLAG_NO_BATT)
-		dev_printk(KERN_INFO, &card->dev->dev,
-			"Size %d KB\n", card->mm_size);
-	else {
-		dev_printk(KERN_INFO, &card->dev->dev,
-			"Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s)\n",
-		       card->mm_size,
-		       batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled",
-		       card->battery[0].good ? "OK" : "FAILURE",
-		       batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled",
-		       card->battery[1].good ? "OK" : "FAILURE");
-
-		set_fault_to_battery_status(card);
-	}
-
-	pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &saved_bar);
-	data = 0xffffffff;
-	pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, data);
-	pci_read_config_dword(dev, PCI_BASE_ADDRESS_1, &data);
-	pci_write_config_dword(dev, PCI_BASE_ADDRESS_1, saved_bar);
-	data &= 0xfffffff0;
-	data = ~data;
-	data += 1;
-
-	if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, DRIVER_NAME,
-			card)) {
-		dev_printk(KERN_ERR, &card->dev->dev,
-			"Unable to allocate IRQ\n");
-		ret = -ENODEV;
-		goto failed_req_irq;
-	}
-
-	dev_printk(KERN_INFO, &card->dev->dev,
-		"Window size %d bytes, IRQ %d\n", data, dev->irq);
-
-	pci_set_drvdata(dev, card);
-
-	if (pci_write_cmd != 0x0F) 	/* If not Memory Write & Invalidate */
-		pci_write_cmd = 0x07;	/* then Memory Write command */
-
-	if (pci_write_cmd & 0x08) { /* use Memory Write and Invalidate */
-		unsigned short cfg_command;
-		pci_read_config_word(dev, PCI_COMMAND, &cfg_command);
-		cfg_command |= 0x10; /* Memory Write & Invalidate Enable */
-		pci_write_config_word(dev, PCI_COMMAND, cfg_command);
-	}
-	pci_cmds = (pci_read_cmd << 28) | (pci_write_cmd << 24);
-
-	num_cards++;
-
-	if (!get_userbit(card, MEMORY_INITIALIZED)) {
-		dev_printk(KERN_INFO, &card->dev->dev,
-		  "memory NOT initialized. Consider over-writing whole device.\n");
-		card->init_size = 0;
-	} else {
-		dev_printk(KERN_INFO, &card->dev->dev,
-			"memory already initialized\n");
-		card->init_size = card->mm_size;
-	}
-
-	/* Enable ECC */
-	writeb(EDC_STORE_CORRECT, card->csr_remap + MEMCTRLCMD_ERRCTRL);
-
-	return 0;
-
- failed_req_irq:
- failed_alloc:
-	if (card->mm_pages[0].desc)
-		dma_free_coherent(&card->dev->dev, PAGE_SIZE * 2,
-				  card->mm_pages[0].desc,
-				  card->mm_pages[0].page_dma);
-	if (card->mm_pages[1].desc)
-		dma_free_coherent(&card->dev->dev, PAGE_SIZE * 2,
-				  card->mm_pages[1].desc,
-				  card->mm_pages[1].page_dma);
- failed_magic:
-	iounmap(card->csr_remap);
- failed_remap_csr:
-	pci_release_regions(dev);
- failed_req_csr:
-
-	return ret;
-}
-
-static void mm_pci_remove(struct pci_dev *dev)
-{
-	struct cardinfo *card = pci_get_drvdata(dev);
-
-	tasklet_kill(&card->tasklet);
-	free_irq(dev->irq, card);
-	iounmap(card->csr_remap);
-
-	if (card->mm_pages[0].desc)
-		dma_free_coherent(&card->dev->dev, PAGE_SIZE * 2,
-				    card->mm_pages[0].desc,
-				    card->mm_pages[0].page_dma);
-	if (card->mm_pages[1].desc)
-		dma_free_coherent(&card->dev->dev, PAGE_SIZE * 2,
-				    card->mm_pages[1].desc,
-				    card->mm_pages[1].page_dma);
-	blk_cleanup_queue(card->queue);
-
-	pci_release_regions(dev);
-	pci_disable_device(dev);
-}
-
-static const struct pci_device_id mm_pci_ids[] = {
-    {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY, PCI_DEVICE_ID_MICRO_MEMORY_5415CN)},
-    {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY, PCI_DEVICE_ID_MICRO_MEMORY_5425CN)},
-    {PCI_DEVICE(PCI_VENDOR_ID_MICRO_MEMORY, PCI_DEVICE_ID_MICRO_MEMORY_6155)},
-    {
-	.vendor	=	0x8086,
-	.device	=	0xB555,
-	.subvendor =	0x1332,
-	.subdevice =	0x5460,
-	.class =	0x050000,
-	.class_mask =	0,
-    }, { /* end: all zeroes */ }
-};
-
-MODULE_DEVICE_TABLE(pci, mm_pci_ids);
-
-static struct pci_driver mm_pci_driver = {
-	.name		= DRIVER_NAME,
-	.id_table	= mm_pci_ids,
-	.probe		= mm_pci_probe,
-	.remove		= mm_pci_remove,
-};
-
-static int __init mm_init(void)
-{
-	int retval, i;
-	int err;
-
-	retval = pci_register_driver(&mm_pci_driver);
-	if (retval)
-		return -ENOMEM;
-
-	err = major_nr = register_blkdev(0, DRIVER_NAME);
-	if (err < 0) {
-		pci_unregister_driver(&mm_pci_driver);
-		return -EIO;
-	}
-
-	for (i = 0; i < num_cards; i++) {
-		mm_gendisk[i] = alloc_disk(1 << MM_SHIFT);
-		if (!mm_gendisk[i])
-			goto out;
-	}
-
-	for (i = 0; i < num_cards; i++) {
-		struct gendisk *disk = mm_gendisk[i];
-		sprintf(disk->disk_name, "umem%c", 'a'+i);
-		spin_lock_init(&cards[i].lock);
-		disk->major = major_nr;
-		disk->first_minor  = i << MM_SHIFT;
-		disk->fops = &mm_fops;
-		disk->private_data = &cards[i];
-		disk->queue = cards[i].queue;
-		set_capacity(disk, cards[i].mm_size << 1);
-		add_disk(disk);
-	}
-
-	init_battery_timer();
-	printk(KERN_INFO "MM: desc_per_page = %ld\n", DESC_PER_PAGE);
-/* printk("mm_init: Done. 10-19-01 9:00\n"); */
-	return 0;
-
-out:
-	pci_unregister_driver(&mm_pci_driver);
-	unregister_blkdev(major_nr, DRIVER_NAME);
-	while (i--)
-		put_disk(mm_gendisk[i]);
-	return -ENOMEM;
-}
-
-static void __exit mm_cleanup(void)
-{
-	int i;
-
-	del_battery_timer();
-
-	for (i = 0; i < num_cards ; i++) {
-		del_gendisk(mm_gendisk[i]);
-		put_disk(mm_gendisk[i]);
-	}
-
-	pci_unregister_driver(&mm_pci_driver);
-
-	unregister_blkdev(major_nr, DRIVER_NAME);
-}
-
-module_init(mm_init);
-module_exit(mm_cleanup);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
diff --git a/drivers/block/umem.h b/drivers/block/umem.h
deleted file mode 100644
index 58384978ff05..000000000000
--- a/drivers/block/umem.h
+++ /dev/null
@@ -1,132 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-/*
- * This file contains defines for the
- *   Micro Memory MM5415
- * family PCI Memory Module with Battery Backup.
- *
- * Copyright Micro Memory INC 2001.  All rights reserved.
- */
-
-#ifndef _DRIVERS_BLOCK_MM_H
-#define _DRIVERS_BLOCK_MM_H
-
-
-#define IRQ_TIMEOUT (1 * HZ)
-
-/* CSR register definition */
-#define MEMCTRLSTATUS_MAGIC	0x00
-#define  MM_MAGIC_VALUE		(unsigned char)0x59
-
-#define MEMCTRLSTATUS_BATTERY	0x04
-#define  BATTERY_1_DISABLED	0x01
-#define  BATTERY_1_FAILURE	0x02
-#define  BATTERY_2_DISABLED	0x04
-#define  BATTERY_2_FAILURE	0x08
-
-#define MEMCTRLSTATUS_MEMORY	0x07
-#define  MEM_128_MB		0xfe
-#define  MEM_256_MB		0xfc
-#define  MEM_512_MB		0xf8
-#define  MEM_1_GB		0xf0
-#define  MEM_2_GB		0xe0
-
-#define MEMCTRLCMD_LEDCTRL	0x08
-#define  LED_REMOVE		2
-#define  LED_FAULT		4
-#define  LED_POWER		6
-#define	 LED_FLIP		255
-#define  LED_OFF		0x00
-#define  LED_ON			0x01
-#define  LED_FLASH_3_5		0x02
-#define  LED_FLASH_7_0		0x03
-#define  LED_POWER_ON		0x00
-#define  LED_POWER_OFF		0x01
-#define  USER_BIT1		0x01
-#define  USER_BIT2		0x02
-
-#define MEMORY_INITIALIZED	USER_BIT1
-
-#define MEMCTRLCMD_ERRCTRL	0x0C
-#define  EDC_NONE_DEFAULT	0x00
-#define  EDC_NONE		0x01
-#define  EDC_STORE_READ		0x02
-#define  EDC_STORE_CORRECT	0x03
-
-#define MEMCTRLCMD_ERRCNT	0x0D
-#define MEMCTRLCMD_ERRSTATUS	0x0E
-
-#define ERROR_DATA_LOG		0x20
-#define ERROR_ADDR_LOG		0x28
-#define ERROR_COUNT		0x3D
-#define ERROR_SYNDROME		0x3E
-#define ERROR_CHECK		0x3F
-
-#define DMA_PCI_ADDR		0x40
-#define DMA_LOCAL_ADDR		0x48
-#define DMA_TRANSFER_SIZE	0x50
-#define DMA_DESCRIPTOR_ADDR	0x58
-#define DMA_SEMAPHORE_ADDR	0x60
-#define DMA_STATUS_CTRL		0x68
-#define  DMASCR_GO		0x00001
-#define  DMASCR_TRANSFER_READ	0x00002
-#define  DMASCR_CHAIN_EN	0x00004
-#define  DMASCR_SEM_EN		0x00010
-#define  DMASCR_DMA_COMP_EN	0x00020
-#define  DMASCR_CHAIN_COMP_EN	0x00040
-#define  DMASCR_ERR_INT_EN	0x00080
-#define  DMASCR_PARITY_INT_EN	0x00100
-#define  DMASCR_ANY_ERR		0x00800
-#define  DMASCR_MBE_ERR		0x01000
-#define  DMASCR_PARITY_ERR_REP	0x02000
-#define  DMASCR_PARITY_ERR_DET	0x04000
-#define  DMASCR_SYSTEM_ERR_SIG	0x08000
-#define  DMASCR_TARGET_ABT	0x10000
-#define  DMASCR_MASTER_ABT	0x20000
-#define  DMASCR_DMA_COMPLETE	0x40000
-#define  DMASCR_CHAIN_COMPLETE	0x80000
-
-/*
-3.SOME PCs HAVE HOST BRIDGES WHICH APPARENTLY DO NOT CORRECTLY HANDLE
-READ-LINE (0xE) OR READ-MULTIPLE (0xC) PCI COMMAND CODES DURING DMA
-TRANSFERS. IN OTHER SYSTEMS THESE COMMAND CODES WILL CAUSE THE HOST BRIDGE
-TO ALLOW LONGER BURSTS DURING DMA READ OPERATIONS. THE UPPER FOUR BITS
-(31..28) OF THE DMA CSR HAVE BEEN MADE PROGRAMMABLE, SO THAT EITHER A 0x6,
-AN 0xE OR A 0xC CAN BE WRITTEN TO THEM TO SET THE COMMAND CODE USED DURING
-DMA READ OPERATIONS.
-*/
-#define        DMASCR_READ   0x60000000
-#define        DMASCR_READLINE   0xE0000000
-#define        DMASCR_READMULTI   0xC0000000
-
-
-#define DMASCR_ERROR_MASK	(DMASCR_MASTER_ABT | DMASCR_TARGET_ABT | DMASCR_SYSTEM_ERR_SIG | DMASCR_PARITY_ERR_DET | DMASCR_MBE_ERR | DMASCR_ANY_ERR)
-#define DMASCR_HARD_ERROR	(DMASCR_MASTER_ABT | DMASCR_TARGET_ABT | DMASCR_SYSTEM_ERR_SIG | DMASCR_PARITY_ERR_DET | DMASCR_MBE_ERR)
-
-#define WINDOWMAP_WINNUM	0x7B
-
-#define DMA_READ_FROM_HOST 0
-#define DMA_WRITE_TO_HOST 1
-
-struct mm_dma_desc {
-	__le64	pci_addr;
-	__le64	local_addr;
-	__le32	transfer_size;
-	u32	zero1;
-	__le64	next_desc_addr;
-	__le64	sem_addr;
-	__le32	control_bits;
-	u32	zero2;
-
-	dma_addr_t data_dma_handle;
-
-	/* Copy of the bits */
-	__le64	sem_control_bits;
-} __attribute__((aligned(8)));
-
-/* bits for card->flags */
-#define UM_FLAG_DMA_IN_REGS		1
-#define UM_FLAG_NO_BYTE_STATUS		2
-#define UM_FLAG_NO_BATTREG		4
-#define	UM_FLAG_NO_BATT			8
-#endif
-- 
2.26.2


  parent reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-23  0:48 [PATCH] block/umem: convert tasklet to threaded irq Davidlohr Bueso
2021-03-23 17:24 ` Christoph Hellwig
2021-03-23 17:27   ` Jens Axboe
2021-03-23 17:55     ` Davidlohr Bueso
2021-03-23 19:07     ` Davidlohr Bueso [this message]
2021-03-23 19:16       ` [PATCH] drivers/block: Goodbye BLK_DEV_UMEM Davidlohr Bueso
2021-03-23 21:17         ` NeilBrown
2021-03-24 12:58       ` Jens Axboe

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