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toaruos/modules/ata.c

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Merge kernel
2018-03-16 15:56:19 +03:00
/* vim: tabstop=4 shiftwidth=4 noexpandtab
* This file is part of ToaruOS and is released under the terms
* of the NCSA / University of Illinois License - see LICENSE.md
Don't use my given name in copyright headers; update everything to 2018 because why not
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* Copyright (C) 2014-2018 K. Lange
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*
* ATA Disk Driver
*
* Provides raw block access to an (Parallel) ATA drive.
*/
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#include <kernel/system.h>
#include <kernel/logging.h>
#include <kernel/module.h>
#include <kernel/fs.h>
#include <kernel/printf.h>
#include <kernel/pci.h>
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/* TODO: Move this to mod/ata.h */
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#include <kernel/ata.h>
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Unify list, tree, hashmap implementations with userspace/kernel
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#include <toaru/list.h>
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static char ata_drive_char = 'a';
static int cdrom_number = 0;
static uint32_t ata_pci = 0x00000000;
static list_t * atapi_waiter;
static int atapi_in_progress = 0;
typedef union {
uint8_t command_bytes[12];
uint16_t command_words[6];
} atapi_command_t;
/* 8086:7010 */
static void find_ata_pci(uint32_t device, uint16_t vendorid, uint16_t deviceid, void * extra) {
if ((vendorid == 0x8086) && (deviceid == 0x7010 || deviceid == 0x7111)) {
*((uint32_t *)extra) = device;
}
}
typedef struct {
uintptr_t offset;
uint16_t bytes;
uint16_t last;
} prdt_t;
struct ata_device {
int io_base;
int control;
int slave;
int is_atapi;
ata_identify_t identity;
prdt_t * dma_prdt;
uintptr_t dma_prdt_phys;
uint8_t * dma_start;
uintptr_t dma_start_phys;
uint32_t bar4;
uint32_t atapi_lba;
uint32_t atapi_sector_size;
};
static struct ata_device ata_primary_master = {.io_base = 0x1F0, .control = 0x3F6, .slave = 0};
static struct ata_device ata_primary_slave = {.io_base = 0x1F0, .control = 0x3F6, .slave = 1};
static struct ata_device ata_secondary_master = {.io_base = 0x170, .control = 0x376, .slave = 0};
static struct ata_device ata_secondary_slave = {.io_base = 0x170, .control = 0x376, .slave = 1};
//static volatile uint8_t ata_lock = 0;
static spin_lock_t ata_lock = { 0 };
/* TODO support other sector sizes */
#define ATA_SECTOR_SIZE 512
static void ata_device_read_sector(struct ata_device * dev, uint32_t lba, uint8_t * buf);
static void ata_device_read_sector_atapi(struct ata_device * dev, uint32_t lba, uint8_t * buf);
static void ata_device_write_sector_retry(struct ata_device * dev, uint32_t lba, uint8_t * buf);
static uint32_t read_ata(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
static uint32_t write_ata(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer);
static void open_ata(fs_node_t *node, unsigned int flags);
static void close_ata(fs_node_t *node);
static uint64_t ata_max_offset(struct ata_device * dev) {
uint64_t sectors = dev->identity.sectors_48;
if (!sectors) {
/* Fall back to sectors_28 */
sectors = dev->identity.sectors_28;
}
return sectors * ATA_SECTOR_SIZE;
}
static uint64_t atapi_max_offset(struct ata_device * dev) {
uint64_t max_sector = dev->atapi_lba;
if (!max_sector) return 0;
return (max_sector + 1) * dev->atapi_sector_size;
}
static uint32_t read_ata(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
struct ata_device * dev = (struct ata_device *)node->device;
unsigned int start_block = offset / ATA_SECTOR_SIZE;
unsigned int end_block = (offset + size - 1) / ATA_SECTOR_SIZE;
unsigned int x_offset = 0;
if (offset > ata_max_offset(dev)) {
return 0;
}
if (offset + size > ata_max_offset(dev)) {
unsigned int i = ata_max_offset(dev) - offset;
size = i;
}
if (offset % ATA_SECTOR_SIZE) {
unsigned int prefix_size = (ATA_SECTOR_SIZE - (offset % ATA_SECTOR_SIZE));
char * tmp = malloc(ATA_SECTOR_SIZE);
ata_device_read_sector(dev, start_block, (uint8_t *)tmp);
memcpy(buffer, (void *)((uintptr_t)tmp + (offset % ATA_SECTOR_SIZE)), prefix_size);
free(tmp);
x_offset += prefix_size;
start_block++;
}
if ((offset + size) % ATA_SECTOR_SIZE && start_block <= end_block) {
unsigned int postfix_size = (offset + size) % ATA_SECTOR_SIZE;
char * tmp = malloc(ATA_SECTOR_SIZE);
ata_device_read_sector(dev, end_block, (uint8_t *)tmp);
memcpy((void *)((uintptr_t)buffer + size - postfix_size), tmp, postfix_size);
free(tmp);
end_block--;
}
while (start_block <= end_block) {
ata_device_read_sector(dev, start_block, (uint8_t *)((uintptr_t)buffer + x_offset));
x_offset += ATA_SECTOR_SIZE;
start_block++;
}
return size;
}
static uint32_t read_atapi(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
struct ata_device * dev = (struct ata_device *)node->device;
unsigned int start_block = offset / dev->atapi_sector_size;
unsigned int end_block = (offset + size - 1) / dev->atapi_sector_size;
unsigned int x_offset = 0;
if (offset > atapi_max_offset(dev)) {
return 0;
}
if (offset + size > atapi_max_offset(dev)) {
unsigned int i = atapi_max_offset(dev) - offset;
size = i;
}
if (offset % dev->atapi_sector_size) {
unsigned int prefix_size = (dev->atapi_sector_size - (offset % dev->atapi_sector_size));
char * tmp = malloc(dev->atapi_sector_size);
ata_device_read_sector_atapi(dev, start_block, (uint8_t *)tmp);
memcpy(buffer, (void *)((uintptr_t)tmp + (offset % dev->atapi_sector_size)), prefix_size);
free(tmp);
x_offset += prefix_size;
start_block++;
}
if ((offset + size) % dev->atapi_sector_size && start_block <= end_block) {
unsigned int postfix_size = (offset + size) % dev->atapi_sector_size;
char * tmp = malloc(dev->atapi_sector_size);
ata_device_read_sector_atapi(dev, end_block, (uint8_t *)tmp);
memcpy((void *)((uintptr_t)buffer + size - postfix_size), tmp, postfix_size);
free(tmp);
end_block--;
}
while (start_block <= end_block) {
ata_device_read_sector_atapi(dev, start_block, (uint8_t *)((uintptr_t)buffer + x_offset));
x_offset += dev->atapi_sector_size;
start_block++;
}
return size;
}
static uint32_t write_ata(fs_node_t *node, uint32_t offset, uint32_t size, uint8_t *buffer) {
struct ata_device * dev = (struct ata_device *)node->device;
unsigned int start_block = offset / ATA_SECTOR_SIZE;
unsigned int end_block = (offset + size - 1) / ATA_SECTOR_SIZE;
unsigned int x_offset = 0;
if (offset > ata_max_offset(dev)) {
return 0;
}
if (offset + size > ata_max_offset(dev)) {
unsigned int i = ata_max_offset(dev) - offset;
size = i;
}
if (offset % ATA_SECTOR_SIZE) {
unsigned int prefix_size = (ATA_SECTOR_SIZE - (offset % ATA_SECTOR_SIZE));
char * tmp = malloc(ATA_SECTOR_SIZE);
ata_device_read_sector(dev, start_block, (uint8_t *)tmp);
debug_print(NOTICE, "Writing first block");
memcpy((void *)((uintptr_t)tmp + (offset % ATA_SECTOR_SIZE)), buffer, prefix_size);
ata_device_write_sector_retry(dev, start_block, (uint8_t *)tmp);
free(tmp);
x_offset += prefix_size;
start_block++;
}
if ((offset + size) % ATA_SECTOR_SIZE && start_block <= end_block) {
unsigned int postfix_size = (offset + size) % ATA_SECTOR_SIZE;
char * tmp = malloc(ATA_SECTOR_SIZE);
ata_device_read_sector(dev, end_block, (uint8_t *)tmp);
debug_print(NOTICE, "Writing last block");
memcpy(tmp, (void *)((uintptr_t)buffer + size - postfix_size), postfix_size);
ata_device_write_sector_retry(dev, end_block, (uint8_t *)tmp);
free(tmp);
end_block--;
}
while (start_block <= end_block) {
ata_device_write_sector_retry(dev, start_block, (uint8_t *)((uintptr_t)buffer + x_offset));
x_offset += ATA_SECTOR_SIZE;
start_block++;
}
return size;
}
static void open_ata(fs_node_t * node, unsigned int flags) {
return;
}
static void close_ata(fs_node_t * node) {
return;
}
static fs_node_t * atapi_device_create(struct ata_device * device) {
fs_node_t * fnode = malloc(sizeof(fs_node_t));
memset(fnode, 0x00, sizeof(fs_node_t));
fnode->inode = 0;
sprintf(fnode->name, "cdrom%d", cdrom_number);
fnode->device = device;
fnode->uid = 0;
fnode->gid = 0;
fnode->mask = 0660;
fnode->length = atapi_max_offset(device);
fnode->flags = FS_BLOCKDEVICE;
fnode->read = read_atapi;
fnode->write = NULL; /* no write support */
fnode->open = open_ata;
fnode->close = close_ata;
fnode->readdir = NULL;
fnode->finddir = NULL;
fnode->ioctl = NULL; /* TODO, identify, etc? */
return fnode;
}
static fs_node_t * ata_device_create(struct ata_device * device) {
fs_node_t * fnode = malloc(sizeof(fs_node_t));
memset(fnode, 0x00, sizeof(fs_node_t));
fnode->inode = 0;
sprintf(fnode->name, "atadev%d", ata_drive_char - 'a');
fnode->device = device;
fnode->uid = 0;
fnode->gid = 0;
fnode->mask = 0660;
fnode->length = ata_max_offset(device); /* TODO */
fnode->flags = FS_BLOCKDEVICE;
fnode->read = read_ata;
fnode->write = write_ata;
fnode->open = open_ata;
fnode->close = close_ata;
fnode->readdir = NULL;
fnode->finddir = NULL;
fnode->ioctl = NULL; /* TODO, identify, etc? */
return fnode;
}
static void ata_io_wait(struct ata_device * dev) {
inportb(dev->io_base + ATA_REG_ALTSTATUS);
inportb(dev->io_base + ATA_REG_ALTSTATUS);
inportb(dev->io_base + ATA_REG_ALTSTATUS);
inportb(dev->io_base + ATA_REG_ALTSTATUS);
}
static int ata_status_wait(struct ata_device * dev, int timeout) {
int status;
if (timeout > 0) {
int i = 0;
while ((status = inportb(dev->io_base + ATA_REG_STATUS)) & ATA_SR_BSY && (i < timeout)) i++;
} else {
while ((status = inportb(dev->io_base + ATA_REG_STATUS)) & ATA_SR_BSY);
}
return status;
}
static int ata_wait(struct ata_device * dev, int advanced) {
uint8_t status = 0;
ata_io_wait(dev);
status = ata_status_wait(dev, -1);
if (advanced) {
status = inportb(dev->io_base + ATA_REG_STATUS);
if (status & ATA_SR_ERR) return 1;
if (status & ATA_SR_DF) return 1;
if (!(status & ATA_SR_DRQ)) return 1;
}
return 0;
}
static void ata_soft_reset(struct ata_device * dev) {
outportb(dev->control, 0x04);
ata_io_wait(dev);
outportb(dev->control, 0x00);
}
static int ata_irq_handler(struct regs *r) {
inportb(ata_primary_master.io_base + ATA_REG_STATUS);
if (atapi_in_progress) {
wakeup_queue(atapi_waiter);
}
irq_ack(14);
return 1;
}
static int ata_irq_handler_s(struct regs *r) {
inportb(ata_secondary_master.io_base + ATA_REG_STATUS);
if (atapi_in_progress) {
wakeup_queue(atapi_waiter);
}
irq_ack(15);
return 1;
}
static void ata_device_init(struct ata_device * dev) {
debug_print(NOTICE, "Initializing IDE device on bus %d", dev->io_base);
outportb(dev->io_base + 1, 1);
outportb(dev->control, 0);
outportb(dev->io_base + ATA_REG_HDDEVSEL, 0xA0 | dev->slave << 4);
ata_io_wait(dev);
outportb(dev->io_base + ATA_REG_COMMAND, ATA_CMD_IDENTIFY);
ata_io_wait(dev);
int status = inportb(dev->io_base + ATA_REG_COMMAND);
debug_print(INFO, "Device status: %d", status);
ata_wait(dev, 0);
uint16_t * buf = (uint16_t *)&dev->identity;
for (int i = 0; i < 256; ++i) {
buf[i] = inports(dev->io_base);
}
uint8_t * ptr = (uint8_t *)&dev->identity.model;
for (int i = 0; i < 39; i+=2) {
uint8_t tmp = ptr[i+1];
ptr[i+1] = ptr[i];
ptr[i] = tmp;
}
dev->is_atapi = 0;
debug_print(NOTICE, "Device Name: %s", dev->identity.model);
debug_print(NOTICE, "Sectors (48): %d", (uint32_t)dev->identity.sectors_48);
debug_print(NOTICE, "Sectors (24): %d", dev->identity.sectors_28);
debug_print(NOTICE, "Setting up DMA...");
dev->dma_prdt = (void *)kvmalloc_p(sizeof(prdt_t) * 1, &dev->dma_prdt_phys);
dev->dma_start = (void *)kvmalloc_p(4096, &dev->dma_start_phys);
debug_print(NOTICE, "Putting prdt at 0x%x (0x%x phys)", dev->dma_prdt, dev->dma_prdt_phys);
debug_print(NOTICE, "Putting prdt[0] at 0x%x (0x%x phys)", dev->dma_start, dev->dma_start_phys);
dev->dma_prdt[0].offset = dev->dma_start_phys;
dev->dma_prdt[0].bytes = 512;
dev->dma_prdt[0].last = 0x8000;
debug_print(NOTICE, "ATA PCI device ID: 0x%x", ata_pci);
uint16_t command_reg = pci_read_field(ata_pci, PCI_COMMAND, 4);
debug_print(NOTICE, "COMMAND register before: 0x%4x", command_reg);
if (command_reg & (1 << 2)) {
debug_print(NOTICE, "Bus mastering already enabled.");
} else {
command_reg |= (1 << 2); /* bit 2 */
debug_print(NOTICE, "Enabling bus mastering...");
pci_write_field(ata_pci, PCI_COMMAND, 4, command_reg);
command_reg = pci_read_field(ata_pci, PCI_COMMAND, 4);
debug_print(NOTICE, "COMMAND register after: 0x%4x", command_reg);
}
dev->bar4 = pci_read_field(ata_pci, PCI_BAR4, 4);
debug_print(NOTICE, "BAR4: 0x%x", dev->bar4);
if (dev->bar4 & 0x00000001) {
dev->bar4 = dev->bar4 & 0xFFFFFFFC;
} else {
debug_print(WARNING, "? ATA bus master registers are /usually/ I/O ports.\n");
return; /* No DMA because we're not sure what to do here */
}
#if 0
pci_write_field(ata_pci, PCI_INTERRUPT_LINE, 1, 0xFE);
if (pci_read_field(ata_pci, PCI_INTERRUPT_LINE, 1) == 0xFE) {
/* needs assignment */
pci_write_field(ata_pci, PCI_INTERRUPT_LINE, 1, 14);
}
#endif
}
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static int atapi_device_init(struct ata_device * dev) {
Merge kernel
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dev->is_atapi = 1;
outportb(dev->io_base + 1, 1);
outportb(dev->control, 0);
outportb(dev->io_base + ATA_REG_HDDEVSEL, 0xA0 | dev->slave << 4);
ata_io_wait(dev);
outportb(dev->io_base + ATA_REG_COMMAND, ATA_CMD_IDENTIFY_PACKET);
ata_io_wait(dev);
int status = inportb(dev->io_base + ATA_REG_COMMAND);
debug_print(INFO, "Device status: %d", status);
ata_wait(dev, 0);
uint16_t * buf = (uint16_t *)&dev->identity;
for (int i = 0; i < 256; ++i) {
buf[i] = inports(dev->io_base);
}
uint8_t * ptr = (uint8_t *)&dev->identity.model;
for (int i = 0; i < 39; i+=2) {
uint8_t tmp = ptr[i+1];
ptr[i+1] = ptr[i];
ptr[i] = tmp;
}
debug_print(NOTICE, "Device Name: %s", dev->identity.model);
/* Detect medium */
atapi_command_t command;
command.command_bytes[0] = 0x25;
command.command_bytes[1] = 0;
command.command_bytes[2] = 0;
command.command_bytes[3] = 0;
command.command_bytes[4] = 0;
command.command_bytes[5] = 0;
command.command_bytes[6] = 0;
command.command_bytes[7] = 0;
command.command_bytes[8] = 0; /* bit 0 = PMI (0, last sector) */
command.command_bytes[9] = 0; /* control */
command.command_bytes[10] = 0;
command.command_bytes[11] = 0;
uint16_t bus = dev->io_base;
outportb(bus + ATA_REG_FEATURES, 0x00);
outportb(bus + ATA_REG_LBA1, 0x08);
outportb(bus + ATA_REG_LBA2, 0x08);
outportb(bus + ATA_REG_COMMAND, ATA_CMD_PACKET);
/* poll */
while (1) {
uint8_t status = inportb(dev->io_base + ATA_REG_STATUS);
if ((status & ATA_SR_ERR)) goto atapi_error;
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRDY)) break;
}
for (int i = 0; i < 6; ++i) {
outports(bus, command.command_words[i]);
}
/* poll */
while (1) {
uint8_t status = inportb(dev->io_base + ATA_REG_STATUS);
if ((status & ATA_SR_ERR)) goto atapi_error_read;
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRDY)) break;
if ((status & ATA_SR_DRQ)) break;
}
uint16_t data[4];
for (int i = 0; i < 4; ++i) {
data[i] = inports(bus);
}
#define htonl(l) ( (((l) & 0xFF) << 24) | (((l) & 0xFF00) << 8) | (((l) & 0xFF0000) >> 8) | (((l) & 0xFF000000) >> 24))
uint32_t lba, blocks;;
memcpy(&lba, &data[0], sizeof(uint32_t));
lba = htonl(lba);
memcpy(&blocks, &data[2], sizeof(uint32_t));
blocks = htonl(blocks);
dev->atapi_lba = lba;
dev->atapi_sector_size = blocks;
Don't show /dev/cdrom0 if it's empty (for now)
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if (!lba) return 1;
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debug_print(WARNING, "Finished! LBA = %x; block length = %x", lba, blocks);
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return 0;
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atapi_error_read:
debug_print(ERROR, "ATAPI error; no medium?");
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return 1;
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atapi_error:
debug_print(ERROR, "ATAPI early error; unsure");
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return 1;
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}
static int ata_device_detect(struct ata_device * dev) {
ata_soft_reset(dev);
ata_io_wait(dev);
outportb(dev->io_base + ATA_REG_HDDEVSEL, 0xA0 | dev->slave << 4);
ata_io_wait(dev);
ata_status_wait(dev, 10000);
unsigned char cl = inportb(dev->io_base + ATA_REG_LBA1); /* CYL_LO */
unsigned char ch = inportb(dev->io_base + ATA_REG_LBA2); /* CYL_HI */
debug_print(NOTICE, "Device detected: 0x%2x 0x%2x", cl, ch);
if (cl == 0xFF && ch == 0xFF) {
/* Nothing here */
return 0;
}
if ((cl == 0x00 && ch == 0x00) ||
(cl == 0x3C && ch == 0xC3)) {
/* Parallel ATA device, or emulated SATA */
char devname[64];
sprintf((char *)&devname, "/dev/hd%c", ata_drive_char);
fs_node_t * node = ata_device_create(dev);
vfs_mount(devname, node);
ata_drive_char++;
ata_device_init(dev);
return 1;
} else if ((cl == 0x14 && ch == 0xEB) ||
(cl == 0x69 && ch == 0x96)) {
debug_print(WARNING, "Detected ATAPI device at io-base 0x%3x, control 0x%3x, slave %d", dev->io_base, dev->control, dev->slave);
char devname[64];
sprintf((char *)&devname, "/dev/cdrom%d", cdrom_number);
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if (atapi_device_init(dev)) {
return 0;
}
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fs_node_t * node = atapi_device_create(dev);
vfs_mount(devname, node);
cdrom_number++;
return 2;
}
/* TODO: ATAPI, SATA, SATAPI */
return 0;
}
static void ata_device_read_sector(struct ata_device * dev, uint32_t lba, uint8_t * buf) {
uint16_t bus = dev->io_base;
uint8_t slave = dev->slave;
if (dev->is_atapi) return;
spin_lock(ata_lock);
#if 0
int errors = 0;
try_again:
#endif
ata_wait(dev, 0);
/* Stop */
outportb(dev->bar4, 0x00);
/* Set the PRDT */
outportl(dev->bar4 + 0x04, dev->dma_prdt_phys);
/* Enable error, irq status */
outportb(dev->bar4 + 0x2, inportb(dev->bar4 + 0x02) | 0x04 | 0x02);
/* set read */
outportb(dev->bar4, 0x08);
IRQ_ON;
while (1) {
uint8_t status = inportb(dev->io_base + ATA_REG_STATUS);
if (!(status & ATA_SR_BSY)) break;
}
outportb(bus + ATA_REG_CONTROL, 0x00);
outportb(bus + ATA_REG_HDDEVSEL, 0xe0 | slave << 4 | (lba & 0x0f000000) >> 24);
ata_io_wait(dev);
outportb(bus + ATA_REG_FEATURES, 0x00);
outportb(bus + ATA_REG_SECCOUNT0, 1);
outportb(bus + ATA_REG_LBA0, (lba & 0x000000ff) >> 0);
outportb(bus + ATA_REG_LBA1, (lba & 0x0000ff00) >> 8);
outportb(bus + ATA_REG_LBA2, (lba & 0x00ff0000) >> 16);
//outportb(bus + ATA_REG_COMMAND, ATA_CMD_READ_PIO);
#if 1
while (1) {
uint8_t status = inportb(dev->io_base + ATA_REG_STATUS);
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRDY)) break;
}
#endif
outportb(bus + ATA_REG_COMMAND, ATA_CMD_READ_DMA);
ata_io_wait(dev);
outportb(dev->bar4, 0x08 | 0x01);
while (1) {
int status = inportb(dev->bar4 + 0x02);
int dstatus = inportb(dev->io_base + ATA_REG_STATUS);
if (!(status & 0x04)) {
continue;
}
if (!(dstatus & ATA_SR_BSY)) {
break;
}
}
IRQ_OFF;
#if 0
if (ata_wait(dev, 1)) {
debug_print(WARNING, "Error during ATA read of lba block %d", lba);
errors++;
if (errors > 4) {
debug_print(WARNING, "-- Too many errors trying to read this block. Bailing.");
spin_unlock(ata_lock);
return;
}
goto try_again;
}
#endif
/* Copy from DMA buffer to output buffer. */
memcpy(buf, dev->dma_start, 512);
/* Inform device we are done. */
outportb(dev->bar4 + 0x2, inportb(dev->bar4 + 0x02) | 0x04 | 0x02);
#if 0
int size = 256;
inportsm(bus,buf,size);
ata_wait(dev, 0);
outportb(bus + ATA_REG_CONTROL, 0x02);
#endif
spin_unlock(ata_lock);
}
static void ata_device_read_sector_atapi(struct ata_device * dev, uint32_t lba, uint8_t * buf) {
if (!dev->is_atapi) return;
uint16_t bus = dev->io_base;
spin_lock(ata_lock);
outportb(dev->io_base + ATA_REG_HDDEVSEL, 0xA0 | dev->slave << 4);
ata_io_wait(dev);
outportb(bus + ATA_REG_FEATURES, 0x00);
outportb(bus + ATA_REG_LBA1, dev->atapi_sector_size & 0xFF);
outportb(bus + ATA_REG_LBA2, dev->atapi_sector_size >> 8);
outportb(bus + ATA_REG_COMMAND, ATA_CMD_PACKET);
/* poll */
while (1) {
uint8_t status = inportb(dev->io_base + ATA_REG_STATUS);
if ((status & ATA_SR_ERR)) goto atapi_error_on_read_setup;
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRQ)) break;
}
atapi_in_progress = 1;
atapi_command_t command;
command.command_bytes[0] = 0xA8;
command.command_bytes[1] = 0;
command.command_bytes[2] = (lba >> 0x18) & 0xFF;
command.command_bytes[3] = (lba >> 0x10) & 0xFF;
command.command_bytes[4] = (lba >> 0x08) & 0xFF;
command.command_bytes[5] = (lba >> 0x00) & 0xFF;
command.command_bytes[6] = 0;
command.command_bytes[7] = 0;
command.command_bytes[8] = 0; /* bit 0 = PMI (0, last sector) */
command.command_bytes[9] = 1; /* control */
command.command_bytes[10] = 0;
command.command_bytes[11] = 0;
for (int i = 0; i < 6; ++i) {
outports(bus, command.command_words[i]);
}
/* Wait */
sleep_on(atapi_waiter);
atapi_in_progress = 0;
while (1) {
uint8_t status = inportb(dev->io_base + ATA_REG_STATUS);
if ((status & ATA_SR_ERR)) goto atapi_error_on_read_setup;
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRQ)) break;
}
uint16_t size_to_read = inportb(bus + ATA_REG_LBA2) << 8;
size_to_read = size_to_read | inportb(bus + ATA_REG_LBA1);
inportsm(bus,buf,size_to_read/2);
while (1) {
uint8_t status = inportb(dev->io_base + ATA_REG_STATUS);
if ((status & ATA_SR_ERR)) goto atapi_error_on_read_setup;
if (!(status & ATA_SR_BSY) && (status & ATA_SR_DRDY)) break;
}
atapi_error_on_read_setup:
spin_unlock(ata_lock);
}
static void ata_device_write_sector(struct ata_device * dev, uint32_t lba, uint8_t * buf) {
uint16_t bus = dev->io_base;
uint8_t slave = dev->slave;
spin_lock(ata_lock);
outportb(bus + ATA_REG_CONTROL, 0x02);
ata_wait(dev, 0);
outportb(bus + ATA_REG_HDDEVSEL, 0xe0 | slave << 4 | (lba & 0x0f000000) >> 24);
ata_wait(dev, 0);
outportb(bus + ATA_REG_FEATURES, 0x00);
outportb(bus + ATA_REG_SECCOUNT0, 0x01);
outportb(bus + ATA_REG_LBA0, (lba & 0x000000ff) >> 0);
outportb(bus + ATA_REG_LBA1, (lba & 0x0000ff00) >> 8);
outportb(bus + ATA_REG_LBA2, (lba & 0x00ff0000) >> 16);
outportb(bus + ATA_REG_COMMAND, ATA_CMD_WRITE_PIO);
ata_wait(dev, 0);
int size = ATA_SECTOR_SIZE / 2;
outportsm(bus,buf,size);
outportb(bus + 0x07, ATA_CMD_CACHE_FLUSH);
ata_wait(dev, 0);
spin_unlock(ata_lock);
}
static int buffer_compare(uint32_t * ptr1, uint32_t * ptr2, size_t size) {
assert(!(size % 4));
size_t i = 0;
while (i < size) {
if (*ptr1 != *ptr2) return 1;
ptr1++;
ptr2++;
i += sizeof(uint32_t);
}
return 0;
}
static void ata_device_write_sector_retry(struct ata_device * dev, uint32_t lba, uint8_t * buf) {
uint8_t * read_buf = malloc(ATA_SECTOR_SIZE);
do {
ata_device_write_sector(dev, lba, buf);
ata_device_read_sector(dev, lba, read_buf);
} while (buffer_compare((uint32_t *)buf, (uint32_t *)read_buf, ATA_SECTOR_SIZE));
free(read_buf);
}
static int ata_initialize(void) {
/* Detect drives and mount them */
/* Locate ATA device via PCI */
pci_scan(&find_ata_pci, -1, &ata_pci);
IRQ stuff
2018-07-21 10:02:39 +03:00
irq_install_handler(14, ata_irq_handler, "ide master");
irq_install_handler(15, ata_irq_handler_s, "ide slave");
Merge kernel
2018-03-16 15:56:19 +03:00
atapi_waiter = list_create();
ata_device_detect(&ata_primary_master);
ata_device_detect(&ata_primary_slave);
ata_device_detect(&ata_secondary_master);
ata_device_detect(&ata_secondary_slave);
return 0;
}
static int ata_finalize(void) {
return 0;
}
MODULE_DEF(ata, ata_initialize, ata_finalize);
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