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Diffstat (limited to 'xen/drivers/ide/ide-dma.c')
| -rw-r--r-- | xen/drivers/ide/ide-dma.c | 897 |
1 files changed, 0 insertions, 897 deletions
diff --git a/xen/drivers/ide/ide-dma.c b/xen/drivers/ide/ide-dma.c deleted file mode 100644 index 80fe970284..0000000000 --- a/xen/drivers/ide/ide-dma.c +++ /dev/null @@ -1,897 +0,0 @@ -/* - * linux/drivers/ide/ide-dma.c Version 4.10 June 9, 2000 - * - * Copyright (c) 1999-2000 Andre Hedrick <andre@linux-ide.org> - * May be copied or modified under the terms of the GNU General Public License - */ - -/* - * Special Thanks to Mark for his Six years of work. - * - * Copyright (c) 1995-1998 Mark Lord - * May be copied or modified under the terms of the GNU General Public License - */ - -/* - * This module provides support for the bus-master IDE DMA functions - * of various PCI chipsets, including the Intel PIIX (i82371FB for - * the 430 FX chipset), the PIIX3 (i82371SB for the 430 HX/VX and - * 440 chipsets), and the PIIX4 (i82371AB for the 430 TX chipset) - * ("PIIX" stands for "PCI ISA IDE Xcellerator"). - * - * Pretty much the same code works for other IDE PCI bus-mastering chipsets. - * - * DMA is supported for all IDE devices (disk drives, cdroms, tapes, floppies). - * - * By default, DMA support is prepared for use, but is currently enabled only - * for drives which already have DMA enabled (UltraDMA or mode 2 multi/single), - * or which are recognized as "good" (see table below). Drives with only mode0 - * or mode1 (multi/single) DMA should also work with this chipset/driver - * (eg. MC2112A) but are not enabled by default. - * - * Use "hdparm -i" to view modes supported by a given drive. - * - * The hdparm-3.5 (or later) utility can be used for manually enabling/disabling - * DMA support, but must be (re-)compiled against this kernel version or later. - * - * To enable DMA, use "hdparm -d1 /dev/hd?" on a per-drive basis after booting. - * If problems arise, ide.c will disable DMA operation after a few retries. - * This error recovery mechanism works and has been extremely well exercised. - * - * IDE drives, depending on their vintage, may support several different modes - * of DMA operation. The boot-time modes are indicated with a "*" in - * the "hdparm -i" listing, and can be changed with *knowledgeable* use of - * the "hdparm -X" feature. There is seldom a need to do this, as drives - * normally power-up with their "best" PIO/DMA modes enabled. - * - * Testing has been done with a rather extensive number of drives, - * with Quantum & Western Digital models generally outperforming the pack, - * and Fujitsu & Conner (and some Seagate which are really Conner) drives - * showing more lackluster throughput. - * - * Keep an eye on /var/adm/messages for "DMA disabled" messages. - * - * Some people have reported trouble with Intel Zappa motherboards. - * This can be fixed by upgrading the AMI BIOS to version 1.00.04.BS0, - * available from ftp://ftp.intel.com/pub/bios/10004bs0.exe - * (thanks to Glen Morrell <glen@spin.Stanford.edu> for researching this). - * - * Thanks to "Christopher J. Reimer" <reimer@doe.carleton.ca> for - * fixing the problem with the BIOS on some Acer motherboards. - * - * Thanks to "Benoit Poulot-Cazajous" <poulot@chorus.fr> for testing - * "TX" chipset compatibility and for providing patches for the "TX" chipset. - * - * Thanks to Christian Brunner <chb@muc.de> for taking a good first crack - * at generic DMA -- his patches were referred to when preparing this code. - * - * Most importantly, thanks to Robert Bringman <rob@mars.trion.com> - * for supplying a Promise UDMA board & WD UDMA drive for this work! - * - * And, yes, Intel Zappa boards really *do* use both PIIX IDE ports. - * - * check_drive_lists(ide_drive_t *drive, int good_bad) - * - * ATA-66/100 and recovery functions, I forgot the rest...... - * SELECT_READ_WRITE(hwif,drive,func) for active tuning based on IO direction. - * - */ - -#include <xen/config.h> -#include <xen/types.h> -#include <xen/lib.h> -#include <xen/timer.h> -#include <xen/mm.h> -#include <xen/interrupt.h> -#include <xen/pci.h> -#include <xen/init.h> -#include <xen/ide.h> - -#include <asm/byteorder.h> -#include <asm/io.h> -#include <asm/irq.h> - -/* - * Long lost data from 2.0.34 that is now in 2.0.39 - * - * This was used in ./drivers/block/triton.c to do DMA Base address setup - * when PnP failed. Oh the things we forget. I believe this was part - * of SFF-8038i that has been withdrawn from public access... :-(( - */ -#define DEFAULT_BMIBA 0xe800 /* in case BIOS did not init it */ -#define DEFAULT_BMCRBA 0xcc00 /* VIA's default value */ -#define DEFAULT_BMALIBA 0xd400 /* ALI's default value */ - -extern char *ide_dmafunc_verbose(ide_dma_action_t dmafunc); - -#ifdef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS - -struct drive_list_entry { - char * id_model; - char * id_firmware; -}; - -struct drive_list_entry drive_whitelist [] = { - - { "Micropolis 2112A" , "ALL" }, - { "CONNER CTMA 4000" , "ALL" }, - { "CONNER CTT8000-A" , "ALL" }, - { "ST34342A" , "ALL" }, - { 0 , 0 } -}; - -struct drive_list_entry drive_blacklist [] = { - - { "WDC AC11000H" , "ALL" }, - { "WDC AC22100H" , "ALL" }, - { "WDC AC31000H" , "ALL" }, - { "WDC AC32500H" , "ALL" }, - { "WDC AC33100H" , "ALL" }, - { "WDC AC31600H" , "ALL" }, - { "WDC AC32100H" , "24.09P07" }, - { "WDC AC23200L" , "21.10N21" }, - { "Compaq CRD-8241B" , "ALL" }, - { "CRD-8400B" , "ALL" }, - { "CRD-8480B", "ALL" }, - { "CRD-8480C", "ALL" }, - { "CRD-8482B", "ALL" }, - { "CRD-84" , "ALL" }, - { "SanDisk SDP3B" , "ALL" }, - { "SanDisk SDP3B-64" , "ALL" }, - { "SANYO CD-ROM CRD" , "ALL" }, - { "HITACHI CDR-8" , "ALL" }, - { "HITACHI CDR-8335" , "ALL" }, - { "HITACHI CDR-8435" , "ALL" }, - { "Toshiba CD-ROM XM-6202B" , "ALL" }, - { "CD-532E-A" , "ALL" }, - { "E-IDE CD-ROM CR-840", "ALL" }, - { "CD-ROM Drive/F5A", "ALL" }, - { "RICOH CD-R/RW MP7083A", "ALL" }, - { "WPI CDD-820", "ALL" }, - { "SAMSUNG CD-ROM SC-148C", "ALL" }, - { "SAMSUNG CD-ROM SC-148F", "ALL" }, - { "SAMSUNG CD-ROM SC", "ALL" }, - { "SanDisk SDP3B-64" , "ALL" }, - { "SAMSUNG CD-ROM SN-124", "ALL" }, - { "PLEXTOR CD-R PX-W8432T", "ALL" }, - { "ATAPI CD-ROM DRIVE 40X MAXIMUM", "ALL" }, - { "_NEC DV5800A", "ALL" }, - { 0 , 0 } - -}; - -int in_drive_list(struct hd_driveid *id, struct drive_list_entry * drive_table) -{ - for ( ; drive_table->id_model ; drive_table++) - if ((!strcmp(drive_table->id_model, id->model)) && - ((!strstr(drive_table->id_firmware, id->fw_rev)) || - (!strcmp(drive_table->id_firmware, "ALL")))) - return 1; - return 0; -} - -#else /* !CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */ - -/* - * good_dma_drives() lists the model names (from "hdparm -i") - * of drives which do not support mode2 DMA but which are - * known to work fine with this interface under Linux. - */ -const char *good_dma_drives[] = {"Micropolis 2112A", - "CONNER CTMA 4000", - "CONNER CTT8000-A", - "ST34342A", /* for Sun Ultra */ - NULL}; - -/* - * bad_dma_drives() lists the model names (from "hdparm -i") - * of drives which supposedly support (U)DMA but which are - * known to corrupt data with this interface under Linux. - * - * This is an empirical list. Its generated from bug reports. That means - * while it reflects actual problem distributions it doesn't answer whether - * the drive or the controller, or cabling, or software, or some combination - * thereof is the fault. If you don't happen to agree with the kernel's - * opinion of your drive - use hdparm to turn DMA on. - */ -const char *bad_dma_drives[] = {"WDC AC11000H", - "WDC AC22100H", - "WDC AC32100H", - "WDC AC32500H", - "WDC AC33100H", - "WDC AC31600H", - NULL}; - -#endif /* CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */ - -/* - * Our Physical Region Descriptor (PRD) table should be large enough - * to handle the biggest I/O request we are likely to see. Since requests - * can have no more than 256 sectors, and since the typical blocksize is - * two or more sectors, we could get by with a limit of 128 entries here for - * the usual worst case. Most requests seem to include some contiguous blocks, - * further reducing the number of table entries required. - * - * The driver reverts to PIO mode for individual requests that exceed - * this limit (possible with 512 byte blocksizes, eg. MSDOS f/s), so handling - * 100% of all crazy scenarios here is not necessary. - * - * As it turns out though, we must allocate a full 4KB page for this, - * so the two PRD tables (ide0 & ide1) will each get half of that, - * allowing each to have about 256 entries (8 bytes each) from this. - */ -#define PRD_BYTES 8 -#define PRD_ENTRIES (PAGE_SIZE / (2 * PRD_BYTES)) - -/* - * dma_intr() is the handler for disk read/write DMA interrupts - */ -ide_startstop_t ide_dma_intr (ide_drive_t *drive) -{ - int i; - byte stat, dma_stat; - - dma_stat = HWIF(drive)->dmaproc(ide_dma_end, drive); - stat = GET_STAT(); /* get drive status */ - if (OK_STAT(stat,DRIVE_READY,drive->bad_wstat|DRQ_STAT)) { - if (!dma_stat) { - struct request *rq = HWGROUP(drive)->rq; - rq = HWGROUP(drive)->rq; - for (i = rq->nr_sectors; i > 0;) { - i -= rq->current_nr_sectors; - ide_end_request(1, HWGROUP(drive)); - } - return ide_stopped; - } - printk("%s: dma_intr: bad DMA status (dma_stat=%x)\n", - drive->name, dma_stat); - } - return ide_error(drive, "dma_intr", stat); -} - -static int ide_build_sglist (ide_hwif_t *hwif, struct request *rq) -{ - struct buffer_head *bh; - struct scatterlist *sg = hwif->sg_table; - unsigned long lastdataend = ~0UL; - int nents = 0; - - if (hwif->sg_dma_active) - BUG(); - - if (rq->cmd == READ) - hwif->sg_dma_direction = PCI_DMA_FROMDEVICE; - else - hwif->sg_dma_direction = PCI_DMA_TODEVICE; - - bh = rq->bh; - do { - struct scatterlist *sge; - - /* - * continue segment from before? - */ - if (virt_to_phys(bh->b_data) == lastdataend) { - sg[nents - 1].length += bh->b_size; - lastdataend += bh->b_size; - continue; - } - - /* - * start new segment - */ - if (nents >= PRD_ENTRIES) - return 0; - - sge = &sg[nents]; - memset(sge, 0, sizeof(*sge)); - sge->address = bh->b_data; - sge->length = bh->b_size; - lastdataend = virt_to_phys(bh->b_data) + bh->b_size; - nents++; - } while ((bh = bh->b_reqnext) != NULL); - - return pci_map_sg(hwif->pci_dev, sg, nents, hwif->sg_dma_direction); -} - -static int ide_raw_build_sglist (ide_hwif_t *hwif, struct request *rq) -{ - struct scatterlist *sg = hwif->sg_table; - int nents = 0; - ide_task_t *args = rq->special; - unsigned char *virt_addr = rq->buffer; - int sector_count = rq->nr_sectors; - -// if ((args->tfRegister[IDE_COMMAND_OFFSET] == WIN_WRITEDMA) || -// (args->tfRegister[IDE_COMMAND_OFFSET] == WIN_WRITEDMA_EXT)) - if (args->command_type == IDE_DRIVE_TASK_RAW_WRITE) - hwif->sg_dma_direction = PCI_DMA_TODEVICE; - else - hwif->sg_dma_direction = PCI_DMA_FROMDEVICE; - - if (sector_count > 128) { - memset(&sg[nents], 0, sizeof(*sg)); - sg[nents].address = virt_addr; - sg[nents].length = 128 * SECTOR_SIZE; - nents++; - virt_addr = virt_addr + (128 * SECTOR_SIZE); - sector_count -= 128; - } - memset(&sg[nents], 0, sizeof(*sg)); - sg[nents].address = virt_addr; - sg[nents].length = sector_count * SECTOR_SIZE; - nents++; - - return pci_map_sg(hwif->pci_dev, sg, nents, hwif->sg_dma_direction); -} - -/* - * ide_build_dmatable() prepares a dma request. - * Returns 0 if all went okay, returns 1 otherwise. - * May also be invoked from trm290.c - */ -int ide_build_dmatable (ide_drive_t *drive, ide_dma_action_t func) -{ - unsigned int *table = HWIF(drive)->dmatable_cpu; -#ifdef CONFIG_BLK_DEV_TRM290 - unsigned int is_trm290_chipset = (HWIF(drive)->chipset == ide_trm290); -#else - const int is_trm290_chipset = 0; -#endif - unsigned int count = 0; - int i; - struct scatterlist *sg; - - if (HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASKFILE) - HWIF(drive)->sg_nents = i = ide_raw_build_sglist(HWIF(drive), HWGROUP(drive)->rq); - else - HWIF(drive)->sg_nents = i = ide_build_sglist(HWIF(drive), HWGROUP(drive)->rq); - - if (!i) - return 0; - - sg = HWIF(drive)->sg_table; - while (i) { - u32 cur_addr; - u32 cur_len; - - cur_addr = sg_dma_address(sg); - cur_len = sg_dma_len(sg); - - /* - * Fill in the dma table, without crossing any 64kB boundaries. - * Most hardware requires 16-bit alignment of all blocks, - * but the trm290 requires 32-bit alignment. - */ - - while (cur_len) { - u32 xcount, bcount = 0x10000 - (cur_addr & 0xffff); - - if (count++ >= PRD_ENTRIES) - BUG(); - - if (bcount > cur_len) - bcount = cur_len; - *table++ = cpu_to_le32(cur_addr); - xcount = bcount & 0xffff; - if (is_trm290_chipset) - xcount = ((xcount >> 2) - 1) << 16; - if (xcount == 0x0000) { - /* - * Most chipsets correctly interpret a length - * of 0x0000 as 64KB, but at least one - * (e.g. CS5530) misinterprets it as zero (!). - * So here we break the 64KB entry into two - * 32KB entries instead. - */ - if (count++ >= PRD_ENTRIES) - goto use_pio_instead; - - *table++ = cpu_to_le32(0x8000); - *table++ = cpu_to_le32(cur_addr + 0x8000); - xcount = 0x8000; - } - *table++ = cpu_to_le32(xcount); - cur_addr += bcount; - cur_len -= bcount; - } - - sg++; - i--; - } - - if (count) { - if (!is_trm290_chipset) - *--table |= cpu_to_le32(0x80000000); - return count; - } - printk("%s: empty DMA table?\n", drive->name); -use_pio_instead: - pci_unmap_sg(HWIF(drive)->pci_dev, - HWIF(drive)->sg_table, - HWIF(drive)->sg_nents, - HWIF(drive)->sg_dma_direction); - HWIF(drive)->sg_dma_active = 0; - return 0; /* revert to PIO for this request */ -} - -/* Teardown mappings after DMA has completed. */ -void ide_destroy_dmatable (ide_drive_t *drive) -{ - struct pci_dev *dev = HWIF(drive)->pci_dev; - struct scatterlist *sg = HWIF(drive)->sg_table; - int nents = HWIF(drive)->sg_nents; - - pci_unmap_sg(dev, sg, nents, HWIF(drive)->sg_dma_direction); - HWIF(drive)->sg_dma_active = 0; -} - -/* - * For both Blacklisted and Whitelisted drives. - * This is setup to be called as an extern for future support - * to other special driver code. - */ -int check_drive_lists (ide_drive_t *drive, int good_bad) -{ - struct hd_driveid *id = drive->id; - -#ifdef CONFIG_IDEDMA_NEW_DRIVE_LISTINGS - if (good_bad) { - return in_drive_list(id, drive_whitelist); - } else { - int blacklist = in_drive_list(id, drive_blacklist); - if (blacklist) - printk("%s: Disabling (U)DMA for %s\n", drive->name, id->model); - return(blacklist); - } -#else /* !CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */ - const char **list; - - if (good_bad) { - /* Consult the list of known "good" drives */ - list = good_dma_drives; - while (*list) { - if (!strcmp(*list++,id->model)) - return 1; - } - } else { - /* Consult the list of known "bad" drives */ - list = bad_dma_drives; - while (*list) { - if (!strcmp(*list++,id->model)) { - printk("%s: Disabling (U)DMA for %s\n", - drive->name, id->model); - return 1; - } - } - } -#endif /* CONFIG_IDEDMA_NEW_DRIVE_LISTINGS */ - return 0; -} - -int report_drive_dmaing (ide_drive_t *drive) -{ - struct hd_driveid *id = drive->id; - - if ((id->field_valid & 4) && (eighty_ninty_three(drive)) && - (id->dma_ultra & (id->dma_ultra >> 14) & 3)) { - if ((id->dma_ultra >> 15) & 1) { - printk(", UDMA(mode 7)"); /* UDMA BIOS-enabled! */ - } else { - printk(", UDMA(133)"); /* UDMA BIOS-enabled! */ - } - } else if ((id->field_valid & 4) && (eighty_ninty_three(drive)) && - (id->dma_ultra & (id->dma_ultra >> 11) & 7)) { - if ((id->dma_ultra >> 13) & 1) { - printk(", UDMA(100)"); /* UDMA BIOS-enabled! */ - } else if ((id->dma_ultra >> 12) & 1) { - printk(", UDMA(66)"); /* UDMA BIOS-enabled! */ - } else { - printk(", UDMA(44)"); /* UDMA BIOS-enabled! */ - } - } else if ((id->field_valid & 4) && - (id->dma_ultra & (id->dma_ultra >> 8) & 7)) { - if ((id->dma_ultra >> 10) & 1) { - printk(", UDMA(33)"); /* UDMA BIOS-enabled! */ - } else if ((id->dma_ultra >> 9) & 1) { - printk(", UDMA(25)"); /* UDMA BIOS-enabled! */ - } else { - printk(", UDMA(16)"); /* UDMA BIOS-enabled! */ - } - } else if (id->field_valid & 4) { - printk(", (U)DMA"); /* Can be BIOS-enabled! */ - } else { - printk(", DMA"); - } - return 1; -} - -static int config_drive_for_dma (ide_drive_t *drive) -{ - int config_allows_dma = 1; - struct hd_driveid *id = drive->id; - ide_hwif_t *hwif = HWIF(drive); - -#ifdef CONFIG_IDEDMA_ONLYDISK - if (drive->media != ide_disk) - config_allows_dma = 0; -#endif - - if (id && (id->capability & 1) && hwif->autodma && config_allows_dma) { - /* Consult the list of known "bad" drives */ - if (ide_dmaproc(ide_dma_bad_drive, drive)) - return hwif->dmaproc(ide_dma_off, drive); - - /* Enable DMA on any drive that has UltraDMA (mode 6/7/?) enabled */ - if ((id->field_valid & 4) && (eighty_ninty_three(drive))) - if ((id->dma_ultra & (id->dma_ultra >> 14) & 2)) - return hwif->dmaproc(ide_dma_on, drive); - /* Enable DMA on any drive that has UltraDMA (mode 3/4/5) enabled */ - if ((id->field_valid & 4) && (eighty_ninty_three(drive))) - if ((id->dma_ultra & (id->dma_ultra >> 11) & 7)) - return hwif->dmaproc(ide_dma_on, drive); - /* Enable DMA on any drive that has UltraDMA (mode 0/1/2) enabled */ - if (id->field_valid & 4) /* UltraDMA */ - if ((id->dma_ultra & (id->dma_ultra >> 8) & 7)) - return hwif->dmaproc(ide_dma_on, drive); - /* Enable DMA on any drive that has mode2 DMA (multi or single) enabled */ - if (id->field_valid & 2) /* regular DMA */ - if ((id->dma_mword & 0x404) == 0x404 || (id->dma_1word & 0x404) == 0x404) - return hwif->dmaproc(ide_dma_on, drive); - /* Consult the list of known "good" drives */ - if (ide_dmaproc(ide_dma_good_drive, drive)) - return hwif->dmaproc(ide_dma_on, drive); - } - return hwif->dmaproc(ide_dma_off_quietly, drive); -} - -#ifndef CONFIG_BLK_DEV_IDEDMA_TIMEOUT -/* - * 1 dmaing, 2 error, 4 intr - */ -static int dma_timer_expiry (ide_drive_t *drive) -{ - byte dma_stat = inb(HWIF(drive)->dma_base+2); - -#ifdef DEBUG - printk("%s: dma_timer_expiry: dma status == 0x%02x\n", drive->name, dma_stat); -#endif /* DEBUG */ - -#if 0 - HWGROUP(drive)->expiry = NULL; /* one free ride for now */ -#endif - - if (dma_stat & 2) { /* ERROR */ - byte stat = GET_STAT(); - return ide_error(drive, "dma_timer_expiry", stat); - } - if (dma_stat & 1) /* DMAing */ - return WAIT_CMD; - return 0; -} -#else /* CONFIG_BLK_DEV_IDEDMA_TIMEOUT */ -static ide_startstop_t ide_dma_timeout_revovery (ide_drive_t *drive) -{ - ide_hwgroup_t *hwgroup = HWGROUP(drive); - ide_hwif_t *hwif = HWIF(drive); - int enable_dma = drive->using_dma; - unsigned long flags; - ide_startstop_t startstop; - - spin_lock_irqsave(&io_request_lock, flags); - hwgroup->handler = NULL; - del_timer(&hwgroup->timer); - spin_unlock_irqrestore(&io_request_lock, flags); - - drive->waiting_for_dma = 0; - - startstop = ide_do_reset(drive); - - if ((enable_dma) && !(drive->using_dma)) - (void) hwif->dmaproc(ide_dma_on, drive); - - return startstop; -} -#endif /* CONFIG_BLK_DEV_IDEDMA_TIMEOUT */ - -#if 0 -static inline void ide_toggle_bounce(ide_drive_t *drive, int on) -{ - dma64_addr_t addr = BLK_BOUNCE_HIGH; - - if (HWIF(drive)->no_highio || HWIF(drive)->pci_dev == NULL) - return; - - if (on && drive->media == ide_disk) { - if (!PCI_DMA_BUS_IS_PHYS) - addr = BLK_BOUNCE_ANY; - else - addr = HWIF(drive)->pci_dev->dma_mask; - } - - blk_queue_bounce_limit(&drive->queue, addr); -} -#endif - -/* - * ide_dmaproc() initiates/aborts DMA read/write operations on a drive. - * - * The caller is assumed to have selected the drive and programmed the drive's - * sector address using CHS or LBA. All that remains is to prepare for DMA - * and then issue the actual read/write DMA/PIO command to the drive. - * - * For ATAPI devices, we just prepare for DMA and return. The caller should - * then issue the packet command to the drive and call us again with - * ide_dma_begin afterwards. - * - * Returns 0 if all went well. - * Returns 1 if DMA read/write could not be started, in which case - * the caller should revert to PIO for the current request. - * May also be invoked from trm290.c - */ -int ide_dmaproc (ide_dma_action_t func, ide_drive_t *drive) -{ -// ide_hwgroup_t *hwgroup = HWGROUP(drive); - ide_hwif_t *hwif = HWIF(drive); - unsigned long dma_base = hwif->dma_base; - byte unit = (drive->select.b.unit & 0x01); - unsigned int count, reading = 0/*, set_high = 1*/; - byte dma_stat; - - switch (func) { - case ide_dma_off: - printk("%s: DMA disabled\n", drive->name); - case ide_dma_off_quietly: - /*set_high = 0;*/ - outb(inb(dma_base+2) & ~(1<<(5+unit)), dma_base+2); - case ide_dma_on: - drive->using_dma = (func == ide_dma_on); - if (drive->using_dma) - outb(inb(dma_base+2)|(1<<(5+unit)), dma_base+2); - /*ide_toggle_bounce(drive, set_high);*/ - return 0; - case ide_dma_check: - return config_drive_for_dma (drive); - case ide_dma_read: - reading = 1 << 3; - case ide_dma_write: - SELECT_READ_WRITE(hwif,drive,func); - if (!(count = ide_build_dmatable(drive, func))) - return 1; /* try PIO instead of DMA */ - outl(hwif->dmatable_dma, dma_base + 4); /* PRD table */ - outb(reading, dma_base); /* specify r/w */ - outb(inb(dma_base+2)|6, dma_base+2); /* clear INTR & ERROR flags */ - drive->waiting_for_dma = 1; - if (drive->media != ide_disk) - return 0; -#ifdef CONFIG_BLK_DEV_IDEDMA_TIMEOUT - ide_set_handler(drive, &ide_dma_intr, 2*WAIT_CMD, NULL); /* issue cmd to drive */ -#else /* !CONFIG_BLK_DEV_IDEDMA_TIMEOUT */ - ide_set_handler(drive, &ide_dma_intr, WAIT_CMD, dma_timer_expiry); /* issue cmd to drive */ -#endif /* CONFIG_BLK_DEV_IDEDMA_TIMEOUT */ - if ((HWGROUP(drive)->rq->cmd == IDE_DRIVE_TASKFILE) && - (drive->addressing == 1)) { - ide_task_t *args = HWGROUP(drive)->rq->special; - OUT_BYTE(args->tfRegister[IDE_COMMAND_OFFSET], IDE_COMMAND_REG); - } else if (drive->addressing) { - OUT_BYTE(reading ? WIN_READDMA_EXT : WIN_WRITEDMA_EXT, IDE_COMMAND_REG); - } else { - OUT_BYTE(reading ? WIN_READDMA : WIN_WRITEDMA, IDE_COMMAND_REG); - } - return HWIF(drive)->dmaproc(ide_dma_begin, drive); - case ide_dma_begin: - /* Note that this is done *after* the cmd has - * been issued to the drive, as per the BM-IDE spec. - * The Promise Ultra33 doesn't work correctly when - * we do this part before issuing the drive cmd. - */ - outb(inb(dma_base)|1, dma_base); /* start DMA */ - return 0; - case ide_dma_end: /* returns 1 on error, 0 otherwise */ - drive->waiting_for_dma = 0; - outb(inb(dma_base)&~1, dma_base); /* stop DMA */ - dma_stat = inb(dma_base+2); /* get DMA status */ - outb(dma_stat|6, dma_base+2); /* clear the INTR & ERROR bits */ - ide_destroy_dmatable(drive); /* purge DMA mappings */ - return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0; /* verify good DMA status */ - case ide_dma_test_irq: /* returns 1 if dma irq issued, 0 otherwise */ - dma_stat = inb(dma_base+2); -#if 0 /* do not set unless you know what you are doing */ - if (dma_stat & 4) { - byte stat = GET_STAT(); - outb(dma_base+2, dma_stat & 0xE4); - } -#endif - return (dma_stat & 4) == 4; /* return 1 if INTR asserted */ - case ide_dma_bad_drive: - case ide_dma_good_drive: - return check_drive_lists(drive, (func == ide_dma_good_drive)); - case ide_dma_verbose: - return report_drive_dmaing(drive); - case ide_dma_timeout: - // FIXME: Many IDE chipsets do not permit command file register access - // FIXME: while the bus-master function is still active. - // FIXME: To prevent deadlock with those chipsets, we must be extremely - // FIXME: careful here (and in ide_intr() as well) to NOT access any - // FIXME: registers from the 0x1Fx/0x17x sets before terminating the - // FIXME: bus-master operation via the bus-master control reg. - // FIXME: Otherwise, chipset deadlock will occur, and some systems will - // FIXME: lock up completely!! -#ifdef CONFIG_BLK_DEV_IDEDMA_TIMEOUT - /* - * Have to issue an abort and requeue the request - * DMA engine got turned off by a goofy ASIC, and - * we have to clean up the mess, and here is as good - * as any. Do it globally for all chipsets. - */ - outb(0x00, dma_base); /* stop DMA */ - dma_stat = inb(dma_base+2); /* get DMA status */ - outb(dma_stat|6, dma_base+2); /* clear the INTR & ERROR bits */ - printk("%s: %s: Lets do it again!" \ - "stat = 0x%02x, dma_stat = 0x%02x\n", - drive->name, ide_dmafunc_verbose(func), - GET_STAT(), dma_stat); - - if (dma_stat & 0xF0) - return ide_dma_timeout_revovery(drive); - - printk("%s: %s: (restart_request) Lets do it again!" \ - "stat = 0x%02x, dma_stat = 0x%02x\n", - drive->name, ide_dmafunc_verbose(func), - GET_STAT(), dma_stat); - - return restart_request(drive); // BUG: return types do not match!! -//#else -// return HWGROUP(drive)->handler(drive); -#endif /* CONFIG_BLK_DEV_IDEDMA_TIMEOUT */ - case ide_dma_retune: - case ide_dma_lostirq: - printk("ide_dmaproc: chipset supported %s func only: %d\n", ide_dmafunc_verbose(func), func); - return 1; - default: - printk("ide_dmaproc: unsupported %s func: %d\n", ide_dmafunc_verbose(func), func); - return 1; - } -} - -/* - * Needed for allowing full modular support of ide-driver - */ -int ide_release_dma (ide_hwif_t *hwif) -{ - if (hwif->dmatable_cpu) { - pci_free_consistent(hwif->pci_dev, - PRD_ENTRIES * PRD_BYTES, - hwif->dmatable_cpu, - hwif->dmatable_dma); - hwif->dmatable_cpu = NULL; - } - if (hwif->sg_table) { - kfree(hwif->sg_table); - hwif->sg_table = NULL; - } - if ((hwif->dma_extra) && (hwif->channel == 0)) - release_region((hwif->dma_base + 16), hwif->dma_extra); - release_region(hwif->dma_base, 8); - return 1; -} - -/* - * This can be called for a dynamically installed interface. Don't __init it - */ - -void ide_setup_dma (ide_hwif_t *hwif, unsigned long dma_base, unsigned int num_ports) -{ - printk(" %s: BM-DMA at 0x%04lx-0x%04lx", hwif->name, dma_base, dma_base + num_ports - 1); - if (check_region(dma_base, num_ports)) { - printk(" -- ERROR, PORT ADDRESSES ALREADY IN USE\n"); - return; - } - request_region(dma_base, num_ports, hwif->name); - hwif->dma_base = dma_base; - hwif->dmatable_cpu = pci_alloc_consistent(hwif->pci_dev, - PRD_ENTRIES * PRD_BYTES, - &hwif->dmatable_dma); - if (hwif->dmatable_cpu == NULL) - goto dma_alloc_failure; - - hwif->sg_table = kmalloc(sizeof(struct scatterlist) * PRD_ENTRIES, - GFP_KERNEL); - if (hwif->sg_table == NULL) { - pci_free_consistent(hwif->pci_dev, PRD_ENTRIES * PRD_BYTES, - hwif->dmatable_cpu, hwif->dmatable_dma); - goto dma_alloc_failure; - } - - hwif->dmaproc = &ide_dmaproc; - - if (hwif->chipset != ide_trm290) { - byte dma_stat = inb(dma_base+2); - printk(", BIOS settings: %s:%s, %s:%s", - hwif->drives[0].name, (dma_stat & 0x20) ? "DMA" : "pio", - hwif->drives[1].name, (dma_stat & 0x40) ? "DMA" : "pio"); - } - printk("\n"); - return; - -dma_alloc_failure: - printk(" -- ERROR, UNABLE TO ALLOCATE DMA TABLES\n"); -} - -/* - * Fetch the DMA Bus-Master-I/O-Base-Address (BMIBA) from PCI space: - */ -unsigned long __init ide_get_or_set_dma_base (ide_hwif_t *hwif, int extra, const char *name) -{ - unsigned long dma_base = 0; - struct pci_dev *dev = hwif->pci_dev; - -#ifdef CONFIG_BLK_DEV_IDEDMA_FORCED - int second_chance = 0; - -second_chance_to_dma: -#endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */ - - if (hwif->mate && hwif->mate->dma_base) { - dma_base = hwif->mate->dma_base - (hwif->channel ? 0 : 8); - } else { - dma_base = pci_resource_start(dev, 4); - if (!dma_base) { - printk("%s: dma_base is invalid (0x%04lx)\n", name, dma_base); - dma_base = 0; - } - } - -#ifdef CONFIG_BLK_DEV_IDEDMA_FORCED - if ((!dma_base) && (!second_chance)) { - unsigned long set_bmiba = 0; - second_chance++; - switch(dev->vendor) { - case PCI_VENDOR_ID_AL: - set_bmiba = DEFAULT_BMALIBA; break; - case PCI_VENDOR_ID_VIA: - set_bmiba = DEFAULT_BMCRBA; break; - case PCI_VENDOR_ID_INTEL: - set_bmiba = DEFAULT_BMIBA; break; - default: - return dma_base; - } - pci_write_config_dword(dev, 0x20, set_bmiba|1); - goto second_chance_to_dma; - } -#endif /* CONFIG_BLK_DEV_IDEDMA_FORCED */ - - if (dma_base) { - if (extra) /* PDC20246, PDC20262, HPT343, & HPT366 */ - request_region(dma_base+16, extra, name); - dma_base += hwif->channel ? 8 : 0; - hwif->dma_extra = extra; - - switch(dev->device) { - case PCI_DEVICE_ID_AL_M5219: - case PCI_DEVICE_ID_AMD_VIPER_7409: - case PCI_DEVICE_ID_CMD_643: - outb(inb(dma_base+2) & 0x60, dma_base+2); - if (inb(dma_base+2) & 0x80) { - printk("%s: simplex device: DMA forced\n", name); - } - break; - default: - /* - * If the device claims "simplex" DMA, - * this means only one of the two interfaces - * can be trusted with DMA at any point in time. - * So we should enable DMA only on one of the - * two interfaces. - */ - if ((inb(dma_base+2) & 0x80)) { /* simplex device? */ - if ((!hwif->drives[0].present && !hwif->drives[1].present) || - (hwif->mate && hwif->mate->dma_base)) { - printk("%s: simplex device: DMA disabled\n", name); - dma_base = 0; - } - } - } - } - return dma_base; -} |