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drivers/block/umem.c
29.5 KB
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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> |
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#include <linux/gfp.h> |
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#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> |
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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]; |
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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. |
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* Otherwise the Ready page is only activated when it becomes full. |
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* * 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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/* |
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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); |
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} else if ((bio->bi_rw & REQ_WRITE) && |
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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 void 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; |
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spin_unlock_irq(&card->lock); |
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return; |
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} |
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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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534 |
} |
1da177e4c Linux-2.6.12-rc2 |
535 536 537 538 |
/* 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... |
539 |
card->csr_remap + DMA_STATUS_CTRL); |
1da177e4c Linux-2.6.12-rc2 |
540 541 |
else writeb((DMASCR_DMA_COMPLETE|DMASCR_CHAIN_COMPLETE) >> 16, |
458cf5e9b Cleanup umem driv... |
542 |
card->csr_remap + DMA_STATUS_CTRL + 2); |
4e953a216 drivers/block/ume... |
543 |
|
1da177e4c Linux-2.6.12-rc2 |
544 545 546 547 548 549 550 |
/* 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... |
551 552 553 554 555 556 |
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 |
557 558 559 560 561 562 563 564 565 |
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... |
566 567 568 569 |
dev_printk(KERN_ERR, &card->dev->dev, "Memory access error detected (err count %d) ", count); |
1da177e4c Linux-2.6.12-rc2 |
570 |
if (stat & 0x02) |
4e0af881a drivers/block/ume... |
571 572 573 |
dev_printk(KERN_ERR, &card->dev->dev, "Multi-bit EDC error "); |
1da177e4c Linux-2.6.12-rc2 |
574 |
|
4e0af881a drivers/block/ume... |
575 576 577 578 579 580 581 582 |
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 |
583 584 585 586 587 |
writeb(0, card->csr_remap + ERROR_COUNT); } if (dma_status & DMASCR_PARITY_ERR_REP) { |
4e0af881a drivers/block/ume... |
588 589 590 |
dev_printk(KERN_ERR, &card->dev->dev, "PARITY ERROR REPORTED "); |
1da177e4c Linux-2.6.12-rc2 |
591 592 593 594 595 |
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... |
596 597 598 |
dev_printk(KERN_ERR, &card->dev->dev, "PARITY ERROR DETECTED "); |
1da177e4c Linux-2.6.12-rc2 |
599 600 601 602 603 |
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... |
604 605 |
dev_printk(KERN_ERR, &card->dev->dev, "SYSTEM ERROR "); |
1da177e4c Linux-2.6.12-rc2 |
606 607 608 609 610 |
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... |
611 612 |
dev_printk(KERN_ERR, &card->dev->dev, "TARGET ABORT "); |
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_MASTER_ABT) { |
4e0af881a drivers/block/ume... |
618 619 |
dev_printk(KERN_ERR, &card->dev->dev, "MASTER ABORT "); |
1da177e4c Linux-2.6.12-rc2 |
620 621 622 623 624 625 626 627 628 |
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... |
629 |
return IRQ_HANDLED; |
1da177e4c Linux-2.6.12-rc2 |
630 |
} |
458cf5e9b Cleanup umem driv... |
631 |
|
1da177e4c Linux-2.6.12-rc2 |
632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 |
/* * 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 |
651 652 653 654 655 656 657 |
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... |
658 659 660 |
dev_printk(KERN_ERR, &card->dev->dev, "Battery %d now good ", battery + 1); |
1da177e4c Linux-2.6.12-rc2 |
661 662 |
card->battery[battery].warned = 0; } else |
4e0af881a drivers/block/ume... |
663 664 665 |
dev_printk(KERN_ERR, &card->dev->dev, "Battery %d now FAILED ", battery + 1); |
1da177e4c Linux-2.6.12-rc2 |
666 667 668 669 670 671 |
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... |
672 673 674 |
dev_printk(KERN_ERR, &card->dev->dev, "Battery %d still FAILED after 5 hours ", battery + 1); |
1da177e4c Linux-2.6.12-rc2 |
675 676 677 678 679 680 681 |
card->battery[battery].warned = 1; return 1; } return 0; } |
458cf5e9b Cleanup umem driv... |
682 |
|
1da177e4c Linux-2.6.12-rc2 |
683 684 685 686 687 688 689 690 691 692 693 |
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... |
694 695 696 |
dev_printk(KERN_DEBUG, &card->dev->dev, "checking battery status, 1 = %s, 2 = %s ", |
1da177e4c Linux-2.6.12-rc2 |
697 698 699 700 701 702 703 704 705 706 707 708 709 |
(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... |
710 |
for (i = 0; i < num_cards; i++) |
1da177e4c Linux-2.6.12-rc2 |
711 712 713 714 715 716 717 718 719 720 721 722 |
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... |
723 |
|
1da177e4c Linux-2.6.12-rc2 |
724 725 726 727 728 729 730 |
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... |
731 |
|
1da177e4c Linux-2.6.12-rc2 |
732 733 734 735 |
static void del_battery_timer(void) { del_timer(&battery_timer); } |
458cf5e9b Cleanup umem driv... |
736 |
|
1da177e4c Linux-2.6.12-rc2 |
737 738 739 740 741 742 743 744 745 746 747 748 749 750 |
/* * 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... |
751 752 |
static int mm_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
1da177e4c Linux-2.6.12-rc2 |
753 |
{ |
a885c8c43 [PATCH] Add block... |
754 755 |
struct cardinfo *card = bdev->bd_disk->private_data; int size = card->mm_size * (1024 / MM_HARDSECT); |
1da177e4c Linux-2.6.12-rc2 |
756 |
|
a885c8c43 [PATCH] Add block... |
757 758 759 760 761 762 763 764 765 |
/* * 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 |
766 |
} |
a885c8c43 [PATCH] Add block... |
767 |
|
83d5cde47 const: make block... |
768 |
static const struct block_device_operations mm_fops = { |
1da177e4c Linux-2.6.12-rc2 |
769 |
.owner = THIS_MODULE, |
a885c8c43 [PATCH] Add block... |
770 |
.getgeo = mm_getgeo, |
458cf5e9b Cleanup umem driv... |
771 |
.revalidate_disk = mm_revalidate, |
1da177e4c Linux-2.6.12-rc2 |
772 |
}; |
458cf5e9b Cleanup umem driv... |
773 774 775 |
static int __devinit mm_pci_probe(struct pci_dev *dev, const struct pci_device_id *id) |
1da177e4c Linux-2.6.12-rc2 |
776 777 778 779 780 781 |
{ 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... |
782 783 |
unsigned long csr_base; unsigned long csr_len; |
1da177e4c Linux-2.6.12-rc2 |
784 |
int magic_number; |
4e0af881a drivers/block/ume... |
785 786 787 788 789 |
static int printed_version; if (!printed_version++) printk(KERN_INFO DRIVER_VERSION " : " DRIVER_DESC " "); |
1da177e4c Linux-2.6.12-rc2 |
790 |
|
ee4a7b687 drivers/block/ume... |
791 792 793 |
ret = pci_enable_device(dev); if (ret) return ret; |
1da177e4c Linux-2.6.12-rc2 |
794 795 796 797 798 |
pci_write_config_byte(dev, PCI_LATENCY_TIMER, 0xF8); pci_set_master(dev); card->dev = dev; |
1da177e4c Linux-2.6.12-rc2 |
799 |
|
ee4a7b687 drivers/block/ume... |
800 801 802 803 |
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 |
804 |
|
4e0af881a drivers/block/ume... |
805 |
dev_printk(KERN_INFO, &dev->dev, |
458cf5e9b Cleanup umem driv... |
806 807 |
"Micro Memory(tm) controller found (PCI Mem Module (Battery Backup)) "); |
1da177e4c Linux-2.6.12-rc2 |
808 |
|
6a35528a8 dma-mapping: repl... |
809 |
if (pci_set_dma_mask(dev, DMA_BIT_MASK(64)) && |
284901a90 dma-mapping: repl... |
810 |
pci_set_dma_mask(dev, DMA_BIT_MASK(32))) { |
4e0af881a drivers/block/ume... |
811 812 |
dev_printk(KERN_WARNING, &dev->dev, "NO suitable DMA found "); |
1da177e4c Linux-2.6.12-rc2 |
813 814 |
return -ENOMEM; } |
ee4a7b687 drivers/block/ume... |
815 816 817 |
ret = pci_request_regions(dev, DRIVER_NAME); if (ret) { |
4e0af881a drivers/block/ume... |
818 819 820 |
dev_printk(KERN_ERR, &card->dev->dev, "Unable to request memory region "); |
1da177e4c Linux-2.6.12-rc2 |
821 822 |
goto failed_req_csr; } |
ee4a7b687 drivers/block/ume... |
823 |
card->csr_remap = ioremap_nocache(csr_base, csr_len); |
1da177e4c Linux-2.6.12-rc2 |
824 |
if (!card->csr_remap) { |
4e0af881a drivers/block/ume... |
825 826 827 |
dev_printk(KERN_ERR, &card->dev->dev, "Unable to remap memory region "); |
1da177e4c Linux-2.6.12-rc2 |
828 829 830 831 |
ret = -ENOMEM; goto failed_remap_csr; } |
4e0af881a drivers/block/ume... |
832 833 834 |
dev_printk(KERN_INFO, &card->dev->dev, "CSR 0x%08lx -> 0x%p (0x%lx) ", |
ee4a7b687 drivers/block/ume... |
835 |
csr_base, card->csr_remap, csr_len); |
1da177e4c Linux-2.6.12-rc2 |
836 |
|
458cf5e9b Cleanup umem driv... |
837 |
switch (card->dev->device) { |
1da177e4c Linux-2.6.12-rc2 |
838 839 840 841 842 843 844 845 846 847 848 |
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... |
849 850 |
card->flags |= UM_FLAG_NO_BYTE_STATUS | UM_FLAG_NO_BATTREG | UM_FLAG_NO_BATT; |
1da177e4c Linux-2.6.12-rc2 |
851 852 853 854 855 856 857 858 859 |
magic_number = 0x99; break; default: magic_number = 0x100; break; } if (readb(card->csr_remap + MEMCTRLSTATUS_MAGIC) != magic_number) { |
4e0af881a drivers/block/ume... |
860 861 |
dev_printk(KERN_ERR, &card->dev->dev, "Magic number invalid "); |
1da177e4c Linux-2.6.12-rc2 |
862 863 864 865 866 |
ret = -ENOMEM; goto failed_magic; } card->mm_pages[0].desc = pci_alloc_consistent(card->dev, |
458cf5e9b Cleanup umem driv... |
867 868 |
PAGE_SIZE * 2, &card->mm_pages[0].page_dma); |
1da177e4c Linux-2.6.12-rc2 |
869 |
card->mm_pages[1].desc = pci_alloc_consistent(card->dev, |
458cf5e9b Cleanup umem driv... |
870 871 |
PAGE_SIZE * 2, &card->mm_pages[1].page_dma); |
1da177e4c Linux-2.6.12-rc2 |
872 873 |
if (card->mm_pages[0].desc == NULL || card->mm_pages[1].desc == NULL) { |
4e0af881a drivers/block/ume... |
874 875 |
dev_printk(KERN_ERR, &card->dev->dev, "alloc failed "); |
1da177e4c Linux-2.6.12-rc2 |
876 877 878 879 880 881 882 883 884 885 886 887 888 889 |
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); |
f3c737de8 umem: fix request... |
890 |
card->queue->queue_lock = &card->lock; |
1da177e4c Linux-2.6.12-rc2 |
891 |
card->queue->queuedata = card; |
1da177e4c Linux-2.6.12-rc2 |
892 893 894 895 |
tasklet_init(&card->tasklet, process_page, (unsigned long)card); card->check_batteries = 0; |
4e953a216 drivers/block/ume... |
896 |
|
1da177e4c Linux-2.6.12-rc2 |
897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 |
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... |
928 |
if (card->flags & UM_FLAG_NO_BATT) |
4e0af881a drivers/block/ume... |
929 930 931 |
dev_printk(KERN_INFO, &card->dev->dev, "Size %d KB ", card->mm_size); |
1da177e4c Linux-2.6.12-rc2 |
932 |
else { |
4e0af881a drivers/block/ume... |
933 934 935 936 |
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... |
937 |
batt_status & BATTERY_1_DISABLED ? "Disabled" : "Enabled", |
1da177e4c Linux-2.6.12-rc2 |
938 |
card->battery[0].good ? "OK" : "FAILURE", |
458cf5e9b Cleanup umem driv... |
939 |
batt_status & BATTERY_2_DISABLED ? "Disabled" : "Enabled", |
1da177e4c Linux-2.6.12-rc2 |
940 941 942 943 944 945 946 947 948 949 950 951 952 |
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... |
953 954 |
if (request_irq(dev->irq, mm_interrupt, IRQF_SHARED, DRIVER_NAME, card)) { |
4e0af881a drivers/block/ume... |
955 956 957 |
dev_printk(KERN_ERR, &card->dev->dev, "Unable to allocate IRQ "); |
1da177e4c Linux-2.6.12-rc2 |
958 |
ret = -ENODEV; |
1da177e4c Linux-2.6.12-rc2 |
959 960 |
goto failed_req_irq; } |
4e0af881a drivers/block/ume... |
961 |
dev_printk(KERN_INFO, &card->dev->dev, |
ee4a7b687 drivers/block/ume... |
962 963 |
"Window size %d bytes, IRQ %d ", data, dev->irq); |
1da177e4c Linux-2.6.12-rc2 |
964 |
|
458cf5e9b Cleanup umem driv... |
965 |
spin_lock_init(&card->lock); |
1da177e4c Linux-2.6.12-rc2 |
966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 |
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... |
983 |
dev_printk(KERN_INFO, &card->dev->dev, |
458cf5e9b Cleanup umem driv... |
984 985 |
"memory NOT initialized. Consider over-writing whole device. "); |
1da177e4c Linux-2.6.12-rc2 |
986 987 |
card->init_size = 0; } else { |
4e0af881a drivers/block/ume... |
988 989 990 |
dev_printk(KERN_INFO, &card->dev->dev, "memory already initialized "); |
1da177e4c Linux-2.6.12-rc2 |
991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 |
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 |
1010 1011 |
iounmap(card->csr_remap); failed_remap_csr: |
ee4a7b687 drivers/block/ume... |
1012 |
pci_release_regions(dev); |
1da177e4c Linux-2.6.12-rc2 |
1013 1014 1015 1016 |
failed_req_csr: return ret; } |
458cf5e9b Cleanup umem driv... |
1017 |
|
1da177e4c Linux-2.6.12-rc2 |
1018 1019 1020 1021 1022 |
static void mm_pci_remove(struct pci_dev *dev) { struct cardinfo *card = pci_get_drvdata(dev); tasklet_kill(&card->tasklet); |
ee4a7b687 drivers/block/ume... |
1023 |
free_irq(dev->irq, card); |
1da177e4c Linux-2.6.12-rc2 |
1024 |
iounmap(card->csr_remap); |
1da177e4c Linux-2.6.12-rc2 |
1025 1026 1027 1028 1029 1030 1031 1032 1033 |
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... |
1034 |
blk_cleanup_queue(card->queue); |
ee4a7b687 drivers/block/ume... |
1035 1036 1037 |
pci_release_regions(dev); pci_disable_device(dev); |
1da177e4c Linux-2.6.12-rc2 |
1038 |
} |
5874c18b1 umem: Fix match o... |
1039 |
static const struct pci_device_id mm_pci_ids[] = { |
458cf5e9b Cleanup umem driv... |
1040 1041 1042 |
{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... |
1043 |
{ |
1da177e4c Linux-2.6.12-rc2 |
1044 1045 |
.vendor = 0x8086, .device = 0xB555, |
458cf5e9b Cleanup umem driv... |
1046 1047 1048 1049 |
.subvendor = 0x1332, .subdevice = 0x5460, .class = 0x050000, .class_mask = 0, |
5874c18b1 umem: Fix match o... |
1050 |
}, { /* end: all zeroes */ } |
1da177e4c Linux-2.6.12-rc2 |
1051 1052 1053 1054 1055 |
}; MODULE_DEVICE_TABLE(pci, mm_pci_ids); static struct pci_driver mm_pci_driver = { |
ee4a7b687 drivers/block/ume... |
1056 1057 1058 1059 |
.name = DRIVER_NAME, .id_table = mm_pci_ids, .probe = mm_pci_probe, .remove = mm_pci_remove, |
1da177e4c Linux-2.6.12-rc2 |
1060 |
}; |
ee4a7b687 drivers/block/ume... |
1061 |
|
1da177e4c Linux-2.6.12-rc2 |
1062 1063 1064 1065 |
static int __init mm_init(void) { int retval, i; int err; |
9bfab8cec [PATCH] drivers/b... |
1066 |
retval = pci_register_driver(&mm_pci_driver); |
1da177e4c Linux-2.6.12-rc2 |
1067 1068 |
if (retval) return -ENOMEM; |
cb3503ca5 drivers/block/ume... |
1069 |
err = major_nr = register_blkdev(0, DRIVER_NAME); |
5a243e0e9 [PATCH] Fix failu... |
1070 1071 |
if (err < 0) { pci_unregister_driver(&mm_pci_driver); |
1da177e4c Linux-2.6.12-rc2 |
1072 |
return -EIO; |
5a243e0e9 [PATCH] Fix failu... |
1073 |
} |
1da177e4c Linux-2.6.12-rc2 |
1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 |
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 |
1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 |
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... |
1095 1096 |
printk(KERN_INFO "MM: desc_per_page = %ld ", DESC_PER_PAGE); |
1da177e4c Linux-2.6.12-rc2 |
1097 1098 1099 1100 1101 |
/* printk("mm_init: Done. 10-19-01 9:00 "); */ return 0; out: |
5a243e0e9 [PATCH] Fix failu... |
1102 |
pci_unregister_driver(&mm_pci_driver); |
cb3503ca5 drivers/block/ume... |
1103 |
unregister_blkdev(major_nr, DRIVER_NAME); |
1da177e4c Linux-2.6.12-rc2 |
1104 1105 1106 1107 |
while (i--) put_disk(mm_gendisk[i]); return -ENOMEM; } |
458cf5e9b Cleanup umem driv... |
1108 |
|
1da177e4c Linux-2.6.12-rc2 |
1109 1110 1111 1112 1113 |
static void __exit mm_cleanup(void) { int i; del_battery_timer(); |
458cf5e9b Cleanup umem driv... |
1114 |
for (i = 0; i < num_cards ; i++) { |
1da177e4c Linux-2.6.12-rc2 |
1115 1116 1117 1118 1119 |
del_gendisk(mm_gendisk[i]); put_disk(mm_gendisk[i]); } pci_unregister_driver(&mm_pci_driver); |
cb3503ca5 drivers/block/ume... |
1120 |
unregister_blkdev(major_nr, DRIVER_NAME); |
1da177e4c Linux-2.6.12-rc2 |
1121 1122 1123 1124 1125 1126 1127 1128 |
} module_init(mm_init); module_exit(mm_cleanup); MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); |