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drivers/block/umem.c
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/* * 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 is released to the public under the terms of the * GNU GENERAL PUBLIC LICENSE version 2 * See the file COPYING for details. * * 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. */ |
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#undef DEBUG /* #define DEBUG if you want debugging info (pr_debug) */ |
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#include <linux/fs.h> #include <linux/bio.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/mman.h> #include <linux/ioctl.h> #include <linux/module.h> #include <linux/init.h> #include <linux/interrupt.h> |
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#include <linux/timer.h> #include <linux/pci.h> #include <linux/slab.h> |
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#include <linux/dma-mapping.h> |
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#include <linux/fcntl.h> /* O_ACCMODE */ #include <linux/hdreg.h> /* HDIO_GETGEO */ |
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#include "umem.h" |
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#include <asm/uaccess.h> #include <asm/io.h> |
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#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 */ |
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#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" |
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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 { |
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struct pci_dev *dev; |
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unsigned char __iomem *csr_remap; |
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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; |
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int current_idx; sector_t current_sector; |
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struct request_queue *queue; |
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struct mm_page { dma_addr_t page_dma; struct mm_dma_desc *desc; int cnt, headcnt; struct bio *bio, **biotail; |
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int idx; |
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} 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 block_device_operations mm_fops; static struct timer_list battery_timer; |
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static int num_cards; |
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static struct gendisk *mm_gendisk[MM_MAXCARDS]; static void check_batteries(struct cardinfo *card); |
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static int get_userbit(struct cardinfo *card, int bit) { unsigned char led; led = readb(card->csr_remap + MEMCTRLCMD_LEDCTRL); return led & bit; } |
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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; } |
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/* * 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 |
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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(" "); } } #endif |
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static void dump_dmastat(struct cardinfo *card, unsigned int dmastat) { |
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dev_printk(KERN_DEBUG, &card->dev->dev, "DMAstat - "); |
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if (dmastat & DMASCR_ANY_ERR) |
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printk(KERN_CONT "ANY_ERR "); |
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if (dmastat & DMASCR_MBE_ERR) |
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printk(KERN_CONT "MBE_ERR "); |
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if (dmastat & DMASCR_PARITY_ERR_REP) |
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printk(KERN_CONT "PARITY_ERR_REP "); |
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if (dmastat & DMASCR_PARITY_ERR_DET) |
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printk(KERN_CONT "PARITY_ERR_DET "); |
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if (dmastat & DMASCR_SYSTEM_ERR_SIG) |
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printk(KERN_CONT "SYSTEM_ERR_SIG "); |
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if (dmastat & DMASCR_TARGET_ABT) |
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printk(KERN_CONT "TARGET_ABT "); |
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if (dmastat & DMASCR_MASTER_ABT) |
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printk(KERN_CONT "MASTER_ABT "); |
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if (dmastat & DMASCR_CHAIN_COMPLETE) |
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printk(KERN_CONT "CHAIN_COMPLETE "); |
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if (dmastat & DMASCR_DMA_COMPLETE) |
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printk(KERN_CONT "DMA_COMPLETE "); |
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printk(" "); } /* * 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, or * when mm_unplug_device is called via the unplug_io_fn. * * 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]; |
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pr_debug("start_io: %d %d->%d ", card->Active, page->headcnt, page->cnt - 1); |
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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; |
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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); |
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offset = ((char *)desc) - ((char *)page->desc); writel(cpu_to_le32((page->page_dma+offset) & 0xffffffff), |
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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) { |
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/* if No page is Active, and Ready is |
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* 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; |
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page->biotail = &page->bio; |
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} |
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static void mm_unplug_device(struct request_queue *q) |
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{ struct cardinfo *card = q->queuedata; unsigned long flags; spin_lock_irqsave(&card->lock, flags); if (blk_remove_plug(q)) activate(card); spin_unlock_irqrestore(&card->lock, flags); } |
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/* |
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* 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; |
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struct bio_vec *vec; int idx; |
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int rw; int len; bio = card->currentbio; if (!bio && card->bio) { card->currentbio = card->bio; |
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card->current_idx = card->bio->bi_idx; card->current_sector = card->bio->bi_sector; |
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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; |
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idx = card->current_idx; |
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rw = bio_rw(bio); if (card->mm_pages[card->Ready].cnt >= DESC_PER_PAGE) return 0; |
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vec = bio_iovec_idx(bio, idx); len = vec->bv_len; dma_handle = pci_map_page(card->dev, vec->bv_page, vec->bv_offset, |
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len, |
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(rw == READ) ? |
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PCI_DMA_FROMDEVICE : PCI_DMA_TODEVICE); p = &card->mm_pages[card->Ready]; desc = &p->desc[p->cnt]; p->cnt++; |
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if (p->bio == NULL) p->idx = idx; |
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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); |
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desc->local_addr = cpu_to_le64(card->current_sector << 9); |
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desc->transfer_size = cpu_to_le32(len); |
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offset = (((char *)&desc->sem_control_bits) - ((char *)p->desc)); |
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desc->sem_addr = cpu_to_le64((u64)(p->page_dma+offset)); desc->zero1 = desc->zero2 = 0; |
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offset = (((char *)(desc+1)) - ((char *)p->desc)); |
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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 (rw == WRITE) desc->control_bits |= cpu_to_le32(DMASCR_TRANSFER_READ); desc->sem_control_bits = desc->control_bits; |
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card->current_sector += (len >> 9); idx++; card->current_idx = idx; if (idx >= bio->bi_vcnt) |
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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 |
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* dma must have hit an error on that descriptor, so use dma_status * instead and assume that all following descriptors must be re-tried. |
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*/ struct mm_page *page; |
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struct bio *return_bio = NULL; |
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struct cardinfo *card = (struct cardinfo *)data; unsigned int dma_status = card->dma_status; spin_lock_bh(&card->lock); if (card->Active < 0) goto out_unlock; page = &card->mm_pages[card->Active]; |
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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); |
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int last = 0; |
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int idx; if (!(control & DMASCR_DMA_COMPLETE)) { control = dma_status; |
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last = 1; |
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} page->headcnt++; |
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idx = page->idx; page->idx++; if (page->idx >= bio->bi_vcnt) { |
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page->bio = bio->bi_next; |
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if (page->bio) page->idx = page->bio->bi_idx; |
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} |
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pci_unmap_page(card->dev, desc->data_dma_handle, |
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bio_iovec_idx(bio, idx)->bv_len, (control & DMASCR_TRANSFER_READ) ? |
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PCI_DMA_TODEVICE : PCI_DMA_FROMDEVICE); if (control & DMASCR_HARD_ERROR) { /* error */ clear_bit(BIO_UPTODATE, &bio->bi_flags); |
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dev_printk(KERN_WARNING, &card->dev->dev, "I/O error on sector %d/%d ", le32_to_cpu(desc->local_addr)>>9, le32_to_cpu(desc->transfer_size)); |
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dump_dmastat(card, control); } else if (test_bit(BIO_RW, &bio->bi_rw) && |
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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) { |
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dev_printk(KERN_INFO, &card->dev->dev, "memory now initialised "); |
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set_userbit(card, MEMORY_INITIALIZED, 1); } } if (bio != page->bio) { bio->bi_next = return_bio; return_bio = bio; } |
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if (last) break; |
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} 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 */ |
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pr_debug("do some more "); |
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mm_start_io(card); } out_unlock: spin_unlock_bh(&card->lock); |
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while (return_bio) { |
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struct bio *bio = return_bio; return_bio = bio->bi_next; bio->bi_next = NULL; |
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bio_endio(bio, 0); |
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} } |
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static int mm_make_request(struct request_queue *q, struct bio *bio) |
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{ struct cardinfo *card = q->queuedata; |
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pr_debug("mm_make_request %llu %u ", (unsigned long long)bio->bi_sector, bio->bi_size); |
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spin_lock_irq(&card->lock); *card->biotail = bio; bio->bi_next = NULL; card->biotail = &bio->bi_next; blk_plug_device(q); spin_unlock_irq(&card->lock); return 0; } |
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static irqreturn_t mm_interrupt(int irq, void *__card) |
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{ 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; |
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} |
1da177e4c Linux-2.6.12-rc2 |
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/* clear COMPLETION interrupts */ if (card->flags & UM_FLAG_NO_BYTE_STATUS) writel(cpu_to_le32(DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE), |
458cf5e9b Cleanup umem driv... |
553 |
card->csr_remap + DMA_STATUS_CTRL); |
1da177e4c Linux-2.6.12-rc2 |
554 555 |
else writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16, |
458cf5e9b Cleanup umem driv... |
556 |
card->csr_remap + DMA_STATUS_CTRL + 2); |
4e953a216 drivers/block/ume... |
557 |
|
1da177e4c Linux-2.6.12-rc2 |
558 559 560 561 562 563 564 |
/* 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); |
458cf5e9b Cleanup umem driv... |
565 566 567 568 569 570 |
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)); |
1da177e4c Linux-2.6.12-rc2 |
571 572 573 574 575 576 577 578 579 |
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) |
4e0af881a drivers/block/ume... |
580 581 582 583 |
dev_printk(KERN_ERR, &card->dev->dev, "Memory access error detected (err count %d) ", count); |
1da177e4c Linux-2.6.12-rc2 |
584 |
if (stat & 0x02) |
4e0af881a drivers/block/ume... |
585 586 587 |
dev_printk(KERN_ERR, &card->dev->dev, "Multi-bit EDC error "); |
1da177e4c Linux-2.6.12-rc2 |
588 |
|
4e0af881a drivers/block/ume... |
589 590 591 592 593 594 595 596 |
dev_printk(KERN_ERR, &card->dev->dev, "Fault Address 0x%02x%08x, Fault Data 0x%08x%08x ", addr_log2, addr_log1, data_log2, data_log1); dev_printk(KERN_ERR, &card->dev->dev, "Fault Check 0x%02x, Fault Syndrome 0x%02x ", check, syndrome); |
1da177e4c Linux-2.6.12-rc2 |
597 598 599 600 601 |
writeb(0, card->csr_remap + ERROR_COUNT); } if (dma_status & DMASCR_PARITY_ERR_REP) { |
4e0af881a drivers/block/ume... |
602 603 604 |
dev_printk(KERN_ERR, &card->dev->dev, "PARITY ERROR REPORTED "); |
1da177e4c Linux-2.6.12-rc2 |
605 606 607 608 609 |
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) { |
4e0af881a drivers/block/ume... |
610 611 612 |
dev_printk(KERN_ERR, &card->dev->dev, "PARITY ERROR DETECTED "); |
1da177e4c Linux-2.6.12-rc2 |
613 614 615 616 617 |
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) { |
4e0af881a drivers/block/ume... |
618 619 |
dev_printk(KERN_ERR, &card->dev->dev, "SYSTEM ERROR "); |
1da177e4c Linux-2.6.12-rc2 |
620 621 622 623 624 |
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) { |
4e0af881a drivers/block/ume... |
625 626 |
dev_printk(KERN_ERR, &card->dev->dev, "TARGET ABORT "); |
1da177e4c Linux-2.6.12-rc2 |
627 628 629 630 631 |
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) { |
4e0af881a drivers/block/ume... |
632 633 |
dev_printk(KERN_ERR, &card->dev->dev, "MASTER ABORT "); |
1da177e4c Linux-2.6.12-rc2 |
634 635 636 637 638 639 640 641 642 |
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); |
4e953a216 drivers/block/ume... |
643 |
return IRQ_HANDLED; |
1da177e4c Linux-2.6.12-rc2 |
644 |
} |
458cf5e9b Cleanup umem driv... |
645 |
|
1da177e4c Linux-2.6.12-rc2 |
646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 |
/* * 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); |
1da177e4c Linux-2.6.12-rc2 |
665 666 667 668 669 670 671 |
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) { |
4e0af881a drivers/block/ume... |
672 673 674 |
dev_printk(KERN_ERR, &card->dev->dev, "Battery %d now good ", battery + 1); |
1da177e4c Linux-2.6.12-rc2 |
675 676 |
card->battery[battery].warned = 0; } else |
4e0af881a drivers/block/ume... |
677 678 679 |
dev_printk(KERN_ERR, &card->dev->dev, "Battery %d now FAILED ", battery + 1); |
1da177e4c Linux-2.6.12-rc2 |
680 681 682 683 684 685 |
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))) { |
4e0af881a drivers/block/ume... |
686 687 688 |
dev_printk(KERN_ERR, &card->dev->dev, "Battery %d still FAILED after 5 hours ", battery + 1); |
1da177e4c Linux-2.6.12-rc2 |
689 690 691 692 693 694 695 |
card->battery[battery].warned = 1; return 1; } return 0; } |
458cf5e9b Cleanup umem driv... |
696 |
|
1da177e4c Linux-2.6.12-rc2 |
697 698 699 700 701 702 703 704 705 706 707 |
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) |
4e0af881a drivers/block/ume... |
708 709 710 |
dev_printk(KERN_DEBUG, &card->dev->dev, "checking battery status, 1 = %s, 2 = %s ", |
1da177e4c Linux-2.6.12-rc2 |
711 712 713 714 715 716 717 718 719 720 721 722 723 |
(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(unsigned long ptr) { int i; |
4e953a216 drivers/block/ume... |
724 |
for (i = 0; i < num_cards; i++) |
1da177e4c Linux-2.6.12-rc2 |
725 726 727 728 729 730 731 732 733 734 735 736 |
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(); } |
458cf5e9b Cleanup umem driv... |
737 |
|
1da177e4c Linux-2.6.12-rc2 |
738 739 740 741 742 743 744 |
static void init_battery_timer(void) { init_timer(&battery_timer); battery_timer.function = check_all_batteries; battery_timer.expires = jiffies + (HZ * 60); add_timer(&battery_timer); } |
458cf5e9b Cleanup umem driv... |
745 |
|
1da177e4c Linux-2.6.12-rc2 |
746 747 748 749 |
static void del_battery_timer(void) { del_timer(&battery_timer); } |
458cf5e9b Cleanup umem driv... |
750 |
|
1da177e4c Linux-2.6.12-rc2 |
751 752 753 754 755 756 757 758 759 760 761 762 763 764 |
/* * 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; } |
a885c8c43 [PATCH] Add block... |
765 766 |
static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4c Linux-2.6.12-rc2 |
767 |
{ |
a885c8c43 [PATCH] Add block... |
768 769 |
struct cardinfo *card = bdev->bd_disk->private_data; int size = card->mm_size * (1024 / MM_HARDSECT); |
1da177e4c Linux-2.6.12-rc2 |
770 |
|
a885c8c43 [PATCH] Add block... |
771 772 773 774 775 776 777 778 779 |
/* * 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; |
1da177e4c Linux-2.6.12-rc2 |
780 |
} |
a885c8c43 [PATCH] Add block... |
781 |
|
1da177e4c Linux-2.6.12-rc2 |
782 |
/* |
458cf5e9b Cleanup umem driv... |
783 784 |
* Future support for removable devices */ |
1da177e4c Linux-2.6.12-rc2 |
785 786 787 788 789 |
static int mm_check_change(struct gendisk *disk) { /* struct cardinfo *dev = disk->private_data; */ return 0; } |
458cf5e9b Cleanup umem driv... |
790 |
|
1da177e4c Linux-2.6.12-rc2 |
791 792 |
static struct block_device_operations mm_fops = { .owner = THIS_MODULE, |
a885c8c43 [PATCH] Add block... |
793 |
.getgeo = mm_getgeo, |
458cf5e9b Cleanup umem driv... |
794 |
.revalidate_disk = mm_revalidate, |
1da177e4c Linux-2.6.12-rc2 |
795 796 |
.media_changed = mm_check_change, }; |
458cf5e9b Cleanup umem driv... |
797 798 799 |
static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4c Linux-2.6.12-rc2 |
800 801 802 803 804 805 |
{ int ret = -ENODEV; struct cardinfo *card = &cards[num_cards]; unsigned char mem_present; unsigned char batt_status; unsigned int saved_bar, data; |
ee4a7b687 drivers/block/ume... |
806 807 |
unsigned long csr_base; unsigned long csr_len; |
1da177e4c Linux-2.6.12-rc2 |
808 |
int magic_number; |
4e0af881a drivers/block/ume... |
809 810 811 812 813 |
static int printed_version; if (!printed_version++) printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC " "); |
1da177e4c Linux-2.6.12-rc2 |
814 |
|
ee4a7b687 drivers/block/ume... |
815 816 817 |
ret = pci_enable_device(dev); if (ret) return ret; |
1da177e4c Linux-2.6.12-rc2 |
818 819 820 821 822 |
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8); pci_set_master(dev); card->dev = dev; |
1da177e4c Linux-2.6.12-rc2 |
823 |
|
ee4a7b687 drivers/block/ume... |
824 825 826 827 |
csr_base = pci_resource_start(dev, 0); csr_len = pci_resource_len(dev, 0); if (!csr_base || !csr_len) return -ENODEV; |
1da177e4c Linux-2.6.12-rc2 |
828 |
|
4e0af881a drivers/block/ume... |
829 |
dev_printk(KERN_INFO, &dev->dev, |
458cf5e9b Cleanup umem driv... |
830 831 |
"Micro Memory(tm) controller found (PCI Mem Module (Battery Backup)) "); |
1da177e4c Linux-2.6.12-rc2 |
832 |
|
910638ae7 [PATCH] Replace 0... |
833 834 |
if (pci_set_dma_mask(dev, DMA_64BIT_MASK) && pci_set_dma_mask(dev, DMA_32BIT_MASK)) { |
4e0af881a drivers/block/ume... |
835 836 |
dev_printk(KERN_WARNING, &dev->dev, "NO suitable DMA found "); |
1da177e4c Linux-2.6.12-rc2 |
837 838 |
return -ENOMEM; } |
ee4a7b687 drivers/block/ume... |
839 840 841 |
ret = pci_request_regions(dev, DRIVER_NAME); if (ret) { |
4e0af881a drivers/block/ume... |
842 843 844 |
dev_printk(KERN_ERR, &card->dev->dev, "Unable to request memory region "); |
1da177e4c Linux-2.6.12-rc2 |
845 846 |
goto failed_req_csr; } |
ee4a7b687 drivers/block/ume... |
847 |
card->csr_remap = ioremap_nocache(csr_base, csr_len); |
1da177e4c Linux-2.6.12-rc2 |
848 |
if (!card->csr_remap) { |
4e0af881a drivers/block/ume... |
849 850 851 |
dev_printk(KERN_ERR, &card->dev->dev, "Unable to remap memory region "); |
1da177e4c Linux-2.6.12-rc2 |
852 853 854 855 |
ret = -ENOMEM; goto failed_remap_csr; } |
4e0af881a drivers/block/ume... |
856 857 858 |
dev_printk(KERN_INFO, &card->dev->dev, "CSR 0x%08lx -> 0x%p (0x%lx) ", |
ee4a7b687 drivers/block/ume... |
859 |
csr_base, card->csr_remap, csr_len); |
1da177e4c Linux-2.6.12-rc2 |
860 |
|
458cf5e9b Cleanup umem driv... |
861 |
switch (card->dev->device) { |
1da177e4c Linux-2.6.12-rc2 |
862 863 864 865 866 867 868 869 870 871 872 |
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: |
458cf5e9b Cleanup umem driv... |
873 874 |
card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT; |
1da177e4c Linux-2.6.12-rc2 |
875 876 877 878 879 880 881 882 883 |
magic_number = 0x99; break; default: magic_number = 0x100; break; } if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) { |
4e0af881a drivers/block/ume... |
884 885 |
dev_printk(KERN_ERR, &card->dev->dev, "Magic number invalid "); |
1da177e4c Linux-2.6.12-rc2 |
886 887 888 889 890 |
ret = -ENOMEM; goto failed_magic; } card->mm_pages[0].desc = pci_alloc_consistent(card->dev, |
458cf5e9b Cleanup umem driv... |
891 892 |
PAGE_SIZE * 2, &card->mm_pages[0].page_dma); |
1da177e4c Linux-2.6.12-rc2 |
893 |
card->mm_pages[1].desc = pci_alloc_consistent(card->dev, |
458cf5e9b Cleanup umem driv... |
894 895 |
PAGE_SIZE * 2, &card->mm_pages[1].page_dma); |
1da177e4c Linux-2.6.12-rc2 |
896 897 |
if (card->mm_pages[0].desc == NULL || card->mm_pages[1].desc == NULL) { |
4e0af881a drivers/block/ume... |
898 899 |
dev_printk(KERN_ERR, &card->dev->dev, "alloc failed "); |
1da177e4c Linux-2.6.12-rc2 |
900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 |
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; card->queue = blk_alloc_queue(GFP_KERNEL); if (!card->queue) goto failed_alloc; blk_queue_make_request(card->queue, mm_make_request); card->queue->queuedata = card; card->queue->unplug_fn = mm_unplug_device; tasklet_init(&card->tasklet, process_page, (unsigned long)card); card->check_batteries = 0; |
4e953a216 drivers/block/ume... |
920 |
|
1da177e4c Linux-2.6.12-rc2 |
921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 |
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; |
4e953a216 drivers/block/ume... |
952 |
if (card->flags & UM_FLAG_NO_BATT) |
4e0af881a drivers/block/ume... |
953 954 955 |
dev_printk(KERN_INFO, &card->dev->dev, "Size %d KB ", card->mm_size); |
1da177e4c Linux-2.6.12-rc2 |
956 |
else { |
4e0af881a drivers/block/ume... |
957 958 959 960 |
dev_printk(KERN_INFO, &card->dev->dev, "Size %d KB, Battery 1 %s (%s), Battery 2 %s (%s) ", card->mm_size, |
458cf5e9b Cleanup umem driv... |
961 |
batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled", |
1da177e4c Linux-2.6.12-rc2 |
962 |
card->battery[0].good ? "OK" : "FAILURE", |
458cf5e9b Cleanup umem driv... |
963 |
batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled", |
1da177e4c Linux-2.6.12-rc2 |
964 965 966 967 968 969 970 971 972 973 974 975 976 |
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; |
458cf5e9b Cleanup umem driv... |
977 978 |
if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, DRIVER_NAME, card)) { |
4e0af881a drivers/block/ume... |
979 980 981 |
dev_printk(KERN_ERR, &card->dev->dev, "Unable to allocate IRQ "); |
1da177e4c Linux-2.6.12-rc2 |
982 |
ret = -ENODEV; |
1da177e4c Linux-2.6.12-rc2 |
983 984 |
goto failed_req_irq; } |
4e0af881a drivers/block/ume... |
985 |
dev_printk(KERN_INFO, &card->dev->dev, |
ee4a7b687 drivers/block/ume... |
986 987 |
"Window size %d bytes, IRQ %d ", data, dev->irq); |
1da177e4c Linux-2.6.12-rc2 |
988 |
|
458cf5e9b Cleanup umem driv... |
989 |
spin_lock_init(&card->lock); |
1da177e4c Linux-2.6.12-rc2 |
990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 |
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)) { |
4e0af881a drivers/block/ume... |
1007 |
dev_printk(KERN_INFO, &card->dev->dev, |
458cf5e9b Cleanup umem driv... |
1008 1009 |
"memory NOT initialized. Consider over-writing whole device. "); |
1da177e4c Linux-2.6.12-rc2 |
1010 1011 |
card->init_size = 0; } else { |
4e0af881a drivers/block/ume... |
1012 1013 1014 |
dev_printk(KERN_INFO, &card->dev->dev, "memory already initialized "); |
1da177e4c Linux-2.6.12-rc2 |
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 |
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) pci_free_consistent(card->dev, PAGE_SIZE*2, card->mm_pages[0].desc, card->mm_pages[0].page_dma); if (card->mm_pages[1].desc) pci_free_consistent(card->dev, PAGE_SIZE*2, card->mm_pages[1].desc, card->mm_pages[1].page_dma); failed_magic: |
1da177e4c Linux-2.6.12-rc2 |
1034 1035 |
iounmap(card->csr_remap); failed_remap_csr: |
ee4a7b687 drivers/block/ume... |
1036 |
pci_release_regions(dev); |
1da177e4c Linux-2.6.12-rc2 |
1037 1038 1039 1040 |
failed_req_csr: return ret; } |
458cf5e9b Cleanup umem driv... |
1041 |
|
1da177e4c Linux-2.6.12-rc2 |
1042 1043 1044 1045 1046 |
static void mm_pci_remove(struct pci_dev *dev) { struct cardinfo *card = pci_get_drvdata(dev); tasklet_kill(&card->tasklet); |
ee4a7b687 drivers/block/ume... |
1047 |
free_irq(dev->irq, card); |
1da177e4c Linux-2.6.12-rc2 |
1048 |
iounmap(card->csr_remap); |
1da177e4c Linux-2.6.12-rc2 |
1049 1050 1051 1052 1053 1054 1055 1056 1057 |
if (card->mm_pages[0].desc) pci_free_consistent(card->dev, PAGE_SIZE*2, card->mm_pages[0].desc, card->mm_pages[0].page_dma); if (card->mm_pages[1].desc) pci_free_consistent(card->dev, PAGE_SIZE*2, card->mm_pages[1].desc, card->mm_pages[1].page_dma); |
1312f40e1 [PATCH] regulariz... |
1058 |
blk_cleanup_queue(card->queue); |
ee4a7b687 drivers/block/ume... |
1059 1060 1061 |
pci_release_regions(dev); pci_disable_device(dev); |
1da177e4c Linux-2.6.12-rc2 |
1062 |
} |
5874c18b1 umem: Fix match o... |
1063 |
static const struct pci_device_id mm_pci_ids[] = { |
458cf5e9b Cleanup umem driv... |
1064 1065 1066 |
{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)}, |
5874c18b1 umem: Fix match o... |
1067 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1068 1069 |
.vendor = 0x8086, .device = 0xB555, |
458cf5e9b Cleanup umem driv... |
1070 1071 1072 1073 |
.subvendor = 0x1332, .subdevice = 0x5460, .class = 0x050000, .class_mask = 0, |
5874c18b1 umem: Fix match o... |
1074 |
}, { /* end: all zeroes */ } |
1da177e4c Linux-2.6.12-rc2 |
1075 1076 1077 1078 1079 |
}; MODULE_DEVICE_TABLE(pci, mm_pci_ids); static struct pci_driver mm_pci_driver = { |
ee4a7b687 drivers/block/ume... |
1080 1081 1082 1083 |
.name = DRIVER_NAME, .id_table = mm_pci_ids, .probe = mm_pci_probe, .remove = mm_pci_remove, |
1da177e4c Linux-2.6.12-rc2 |
1084 |
}; |
ee4a7b687 drivers/block/ume... |
1085 |
|
1da177e4c Linux-2.6.12-rc2 |
1086 1087 1088 1089 |
static int __init mm_init(void) { int retval, i; int err; |
9bfab8cec [PATCH] drivers/b... |
1090 |
retval = pci_register_driver(&mm_pci_driver); |
1da177e4c Linux-2.6.12-rc2 |
1091 1092 |
if (retval) return -ENOMEM; |
cb3503ca5 drivers/block/ume... |
1093 |
err = major_nr = register_blkdev(0, DRIVER_NAME); |
5a243e0e9 [PATCH] Fix failu... |
1094 1095 |
if (err < 0) { pci_unregister_driver(&mm_pci_driver); |
1da177e4c Linux-2.6.12-rc2 |
1096 |
return -EIO; |
5a243e0e9 [PATCH] Fix failu... |
1097 |
} |
1da177e4c Linux-2.6.12-rc2 |
1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 |
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); |
1da177e4c Linux-2.6.12-rc2 |
1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 |
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(); |
4e0af881a drivers/block/ume... |
1119 1120 |
printk(KERN_INFO "MM: desc_per_page = %ld ", DESC_PER_PAGE); |
1da177e4c Linux-2.6.12-rc2 |
1121 1122 1123 1124 1125 |
/* printk("mm_init: Done. 10-19-01 9:00 "); */ return 0; out: |
5a243e0e9 [PATCH] Fix failu... |
1126 |
pci_unregister_driver(&mm_pci_driver); |
cb3503ca5 drivers/block/ume... |
1127 |
unregister_blkdev(major_nr, DRIVER_NAME); |
1da177e4c Linux-2.6.12-rc2 |
1128 1129 1130 1131 |
while (i--) put_disk(mm_gendisk[i]); return -ENOMEM; } |
458cf5e9b Cleanup umem driv... |
1132 |
|
1da177e4c Linux-2.6.12-rc2 |
1133 1134 1135 1136 1137 |
static void __exit mm_cleanup(void) { int i; del_battery_timer(); |
458cf5e9b Cleanup umem driv... |
1138 |
for (i = 0; i < num_cards ; i++) { |
1da177e4c Linux-2.6.12-rc2 |
1139 1140 1141 1142 1143 |
del_gendisk(mm_gendisk[i]); put_disk(mm_gendisk[i]); } pci_unregister_driver(&mm_pci_driver); |
cb3503ca5 drivers/block/ume... |
1144 |
unregister_blkdev(major_nr, DRIVER_NAME); |
1da177e4c Linux-2.6.12-rc2 |
1145 1146 1147 1148 1149 1150 1151 1152 |
} module_init(mm_init); module_exit(mm_cleanup); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); |