+++ /dev/null
-// 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");
projects / linux-2.6-microblaze.git / commitdiff