460 lines
11 KiB
C
460 lines
11 KiB
C
#include <amd64/apic.h>
|
|
#include <amd64/intr_defs.h>
|
|
#include <amd64/io.h>
|
|
#include <device/device.h>
|
|
#include <device/idedrv.h>
|
|
#include <device/partitions.h>
|
|
#include <devices.h>
|
|
#include <irq/irq.h>
|
|
#include <libk/list.h>
|
|
#include <libk/std.h>
|
|
#include <libk/string.h>
|
|
#include <mm/malloc.h>
|
|
#include <proc/proc.h>
|
|
#include <proc/reschedule.h>
|
|
#include <status.h>
|
|
#include <sys/debug.h>
|
|
|
|
#define IDE_REG_DATA 0x00
|
|
#define IDE_REG_ERROR 0x01
|
|
#define IDE_REG_SECCOUNT 0x02
|
|
#define IDE_REG_LBA0 0x03
|
|
#define IDE_REG_LBA1 0x04
|
|
#define IDE_REG_LBA2 0x05
|
|
#define IDE_REG_DRIVE 0x06
|
|
#define IDE_REG_STATUS 0x07
|
|
#define IDE_REG_CMD 0x07
|
|
|
|
#define IDE_BSY 0x80
|
|
#define IDE_DRDY 0x40
|
|
#define IDE_DF 0x20
|
|
#define IDE_ERR 0x01
|
|
#define IDE_DRQ 0x08
|
|
|
|
#define IDE_CMD_READ28 0x20
|
|
#define IDE_CMD_WRITE28 0x30
|
|
#define IDE_CMD_READ48 0x24
|
|
#define IDE_CMD_WRITE48 0x34
|
|
#define IDE_CMD_FLUSH48 0xEA
|
|
#define IDE_CMD_FLUSH28 0xE7
|
|
#define IDE_CMD_IDENTIFY 0xEC
|
|
|
|
#define IDE_READ 1
|
|
#define IDE_WRITE 2
|
|
|
|
static bool ide_wait (uint16_t io, uint32_t timeout, bool drq, bool errcheck) {
|
|
uint32_t i = 0;
|
|
uint8_t status;
|
|
|
|
while (1) {
|
|
status = inb (io + IDE_REG_STATUS);
|
|
|
|
if (!(status & IDE_BSY))
|
|
break;
|
|
|
|
if (++i >= timeout)
|
|
return false;
|
|
}
|
|
|
|
if (errcheck && (status & (IDE_ERR | IDE_DF)))
|
|
return false;
|
|
|
|
if (!drq)
|
|
return true;
|
|
|
|
i = 0;
|
|
|
|
while (1) {
|
|
status = inb (io + IDE_REG_STATUS);
|
|
|
|
if (status & (IDE_ERR | IDE_DF))
|
|
return false;
|
|
|
|
if (status & IDE_DRQ)
|
|
return true;
|
|
|
|
if (++i >= timeout)
|
|
return false;
|
|
}
|
|
}
|
|
|
|
#pragma clang optimize off
|
|
static void ide_delay (uint16_t ctrl) {
|
|
inb (ctrl);
|
|
inb (ctrl);
|
|
inb (ctrl);
|
|
inb (ctrl);
|
|
}
|
|
#pragma clang optimize on
|
|
|
|
static void ide_irq (void* arg, void* regs, bool user, struct reschedule_ctx* rctx) {
|
|
uint64_t fd, fp;
|
|
|
|
struct idedrv* idedrv = arg;
|
|
DEBUG ("1\n");
|
|
|
|
spin_lock (&idedrv->device->lock, &fd);
|
|
|
|
struct idedrv_request* req = idedrv->current_req;
|
|
DEBUG ("2\n");
|
|
|
|
if (req == NULL) {
|
|
(void)inb (idedrv->io + IDE_REG_STATUS);
|
|
spin_unlock (&idedrv->device->lock, fd);
|
|
return;
|
|
}
|
|
DEBUG ("3\n");
|
|
|
|
uint8_t status = inb (idedrv->io + IDE_REG_STATUS);
|
|
|
|
if ((status & (IDE_ERR | IDE_DF))) {
|
|
atomic_store (&req->done, 1);
|
|
idedrv->current_req = NULL;
|
|
spin_unlock (&idedrv->device->lock, fd);
|
|
return;
|
|
}
|
|
DEBUG ("4\n");
|
|
|
|
if ((status & IDE_DRQ) && (req->sector_done_count < req->sector_count)) {
|
|
uint16_t* p = req->buffer + (req->sector_done_count * (idedrv->sector_size / 2));
|
|
|
|
if (req->type == IDE_READ)
|
|
insw (idedrv->io + IDE_REG_DATA, p, idedrv->sector_size / 2);
|
|
else
|
|
outsw (idedrv->io + IDE_REG_DATA, p, idedrv->sector_size / 2);
|
|
|
|
req->sector_done_count++;
|
|
DEBUG ("4\n");
|
|
}
|
|
|
|
if ((req->sector_done_count >= req->sector_count)) {
|
|
atomic_store (&req->done, 1);
|
|
idedrv->current_req = NULL;
|
|
}
|
|
DEBUG ("6\n");
|
|
|
|
spin_unlock (&idedrv->device->lock, fd);
|
|
DEBUG ("7\n");
|
|
}
|
|
|
|
void ide_probe (uint16_t io, uint16_t ctrl, uint8_t devno, struct ide_probe* probe) {
|
|
probe->flags = 0;
|
|
probe->sector_count = 0;
|
|
probe->sector_size = 0;
|
|
|
|
uint16_t identify_buffer[256];
|
|
|
|
uint8_t status = inb (io + IDE_REG_STATUS);
|
|
|
|
if (status == 0xFF)
|
|
return;
|
|
|
|
outb (io + IDE_REG_DRIVE, 0xA0 | (devno << 4));
|
|
ide_delay (ctrl);
|
|
|
|
outb (io + IDE_REG_SECCOUNT, 0);
|
|
outb (io + IDE_REG_LBA0, 0);
|
|
outb (io + IDE_REG_LBA1, 0);
|
|
outb (io + IDE_REG_LBA2, 0);
|
|
|
|
outb (io + IDE_REG_CMD, IDE_CMD_IDENTIFY);
|
|
|
|
status = inb (io + IDE_REG_STATUS);
|
|
|
|
if (status == 0)
|
|
return;
|
|
|
|
if (!ide_wait (io, 100000, true, true)) {
|
|
return;
|
|
}
|
|
|
|
insw (io + IDE_REG_DATA, identify_buffer, 256);
|
|
|
|
probe->flags |= IDE_PROBE_AVAIL;
|
|
|
|
if ((identify_buffer[106] & 0xC000) == 0x4000) {
|
|
if (identify_buffer[106] & (1 << 12)) {
|
|
uint32_t words_per_sector =
|
|
(uint32_t)identify_buffer[117] | ((uint32_t)identify_buffer[118] << 16);
|
|
probe->sector_size = (size_t)words_per_sector * 2;
|
|
}
|
|
}
|
|
|
|
if ((identify_buffer[83] & (1 << 10)) != 0)
|
|
probe->flags |= IDE_PROBE_LBA48;
|
|
|
|
if ((probe->flags & IDE_PROBE_LBA48)) {
|
|
probe->sector_count =
|
|
(size_t)((uint64_t)identify_buffer[100] | ((uint64_t)identify_buffer[101] << 16) |
|
|
((uint64_t)identify_buffer[102] << 32) | ((uint64_t)identify_buffer[103] << 48));
|
|
} else {
|
|
probe->sector_count =
|
|
(size_t)((uint64_t)identify_buffer[60] | ((uint64_t)identify_buffer[61] << 16));
|
|
}
|
|
|
|
probe->io = io;
|
|
probe->ctrl = ctrl;
|
|
probe->devno = devno;
|
|
|
|
if (probe->sector_size == 0)
|
|
probe->sector_size = 512;
|
|
}
|
|
|
|
static void ide_prepare (struct idedrv* idedrv, size_t sector, uint16_t sector_count,
|
|
bool irq_enable) {
|
|
uint8_t ctrl = inb (idedrv->ctrl);
|
|
if (irq_enable)
|
|
ctrl &= ~0x02;
|
|
else
|
|
ctrl |= 0x02;
|
|
outb (idedrv->ctrl, ctrl);
|
|
|
|
if (idedrv->lba48) {
|
|
outb (idedrv->io + IDE_REG_DRIVE, 0x40 | (idedrv->devno << 4));
|
|
ide_delay (idedrv->ctrl);
|
|
|
|
ide_wait (idedrv->io, 100000, false, false);
|
|
|
|
outb (idedrv->io + IDE_REG_SECCOUNT, (sector_count >> 8) & 0xFF);
|
|
outb (idedrv->io + IDE_REG_LBA0, (sector >> 24) & 0xFF);
|
|
outb (idedrv->io + IDE_REG_LBA1, (sector >> 32) & 0xFF);
|
|
outb (idedrv->io + IDE_REG_LBA2, (sector >> 40) & 0xFF);
|
|
|
|
outb (idedrv->io + IDE_REG_SECCOUNT, sector_count & 0xFF);
|
|
outb (idedrv->io + IDE_REG_LBA0, sector & 0xFF);
|
|
outb (idedrv->io + IDE_REG_LBA1, (sector >> 8) & 0xFF);
|
|
outb (idedrv->io + IDE_REG_LBA2, (sector >> 16) & 0xFF);
|
|
} else {
|
|
outb (idedrv->io + IDE_REG_DRIVE, 0xE0 | (idedrv->devno << 4) | ((sector >> 24) & 0x0F));
|
|
ide_delay (idedrv->ctrl);
|
|
|
|
ide_wait (idedrv->io, 100000, false, false);
|
|
|
|
uint8_t count = (sector_count == 256) ? 0 : (uint8_t)sector_count;
|
|
outb (idedrv->io + IDE_REG_SECCOUNT, count);
|
|
outb (idedrv->io + IDE_REG_LBA0, sector & 0xFF);
|
|
outb (idedrv->io + IDE_REG_LBA1, (sector >> 8) & 0xFF);
|
|
outb (idedrv->io + IDE_REG_LBA2, (sector >> 16) & 0xFF);
|
|
}
|
|
}
|
|
|
|
bool idedrv_init (struct device* device, void* arg, struct proc* proc,
|
|
struct reschedule_ctx* rctx) {
|
|
(void)proc, (void)rctx;
|
|
|
|
struct idedrv_init* init = arg;
|
|
|
|
struct idedrv* idedrv = malloc (sizeof (*idedrv));
|
|
|
|
if (idedrv == NULL)
|
|
return false;
|
|
|
|
idedrv->device = device;
|
|
idedrv->lba48 = init->lba48;
|
|
idedrv->sector_count = init->sector_count;
|
|
idedrv->sector_size = init->sector_size;
|
|
idedrv->io = init->io;
|
|
idedrv->ctrl = init->ctrl;
|
|
idedrv->devno = init->devno;
|
|
idedrv->irq = init->irq;
|
|
idedrv->current_req = NULL;
|
|
|
|
device->udata = idedrv;
|
|
|
|
irq_attach (&ide_irq, idedrv, idedrv->irq);
|
|
|
|
return true;
|
|
}
|
|
|
|
void idedrv_fini (struct device* device, struct proc* proc, struct reschedule_ctx* rctx) {
|
|
struct idedrv* idedrv = device->udata;
|
|
|
|
if (idedrv->current_req != NULL) {
|
|
free (idedrv->current_req);
|
|
idedrv->current_req = NULL;
|
|
}
|
|
|
|
irq_detach (idedrv->irq);
|
|
free (idedrv);
|
|
}
|
|
|
|
int idedrv_read (struct device* device, struct proc* proc, struct reschedule_ctx* rctx,
|
|
uint64_t* lockflags, void* a1, void* a2, void* a3, void* a4) {
|
|
(void)proc, (void)rctx, (void)a4;
|
|
|
|
if (a1 == NULL || a2 == NULL || a3 == NULL)
|
|
return -ST_BAD_ADDRESS_SPACE;
|
|
|
|
size_t sector = *(size_t*)a1;
|
|
size_t sector_count = *(size_t*)a2;
|
|
uint16_t* buffer = a3;
|
|
|
|
struct idedrv* idedrv = device->udata;
|
|
|
|
DEBUG ("1\n");
|
|
|
|
if (sector + sector_count > idedrv->sector_count)
|
|
return -ST_OOB_ERROR;
|
|
|
|
if (!ide_wait (idedrv->io, 100000, false, false))
|
|
return -ST_XDRV_READ_ERROR;
|
|
|
|
struct idedrv_request* req = malloc (sizeof (*req));
|
|
|
|
if (req == NULL)
|
|
return -ST_OOM_ERROR;
|
|
|
|
memset (req, 0, sizeof (*req));
|
|
req->buffer = buffer;
|
|
req->sector_count = sector_count;
|
|
req->sector_done_count = 0;
|
|
req->type = IDE_READ;
|
|
DEBUG ("2\n");
|
|
|
|
idedrv->current_req = req;
|
|
|
|
ide_prepare (idedrv, sector, sector_count, true);
|
|
DEBUG ("3\n");
|
|
|
|
DEBUG ("4\n");
|
|
|
|
uint8_t cmd = idedrv->lba48 ? IDE_CMD_READ48 : IDE_CMD_READ28;
|
|
outb (idedrv->io + IDE_REG_CMD, cmd);
|
|
DEBUG ("5\n");
|
|
|
|
spin_unlock (&device->lock, *lockflags);
|
|
|
|
while (!atomic_load (&req->done))
|
|
spin_lock_relax ();
|
|
|
|
spin_lock (&device->lock, lockflags);
|
|
DEBUG ("6\n");
|
|
|
|
free (req);
|
|
|
|
return ST_OK;
|
|
}
|
|
|
|
int idedrv_write (struct device* device, struct proc* proc, struct reschedule_ctx* rctx,
|
|
uint64_t* lockflags, void* a1, void* a2, void* a3, void* a4) {
|
|
(void)proc, (void)rctx, (void)a4;
|
|
uint64_t fp;
|
|
|
|
if (a1 == NULL || a2 == NULL || a3 == NULL)
|
|
return -ST_BAD_ADDRESS_SPACE;
|
|
|
|
size_t sector = *(size_t*)a1;
|
|
size_t sector_count = *(size_t*)a2;
|
|
uint16_t* buffer = a3;
|
|
|
|
struct idedrv* idedrv = device->udata;
|
|
|
|
if (sector + sector_count > idedrv->sector_count)
|
|
return -ST_OOB_ERROR;
|
|
|
|
if (!ide_wait (idedrv->io, 100000, false, false))
|
|
return -ST_XDRV_WRITE_ERROR;
|
|
|
|
struct idedrv_request* req = malloc (sizeof (*req));
|
|
|
|
if (req == NULL)
|
|
return -ST_OOM_ERROR;
|
|
|
|
memset (req, 0, sizeof (*req));
|
|
req->buffer = buffer;
|
|
req->sector_count = sector_count;
|
|
req->sector_done_count = 0;
|
|
req->type = IDE_WRITE;
|
|
|
|
idedrv->current_req = req;
|
|
|
|
ide_prepare (idedrv, sector, sector_count, true);
|
|
|
|
uint8_t cmd = idedrv->lba48 ? IDE_CMD_WRITE48 : IDE_CMD_WRITE28;
|
|
outb (idedrv->io + IDE_REG_CMD, cmd);
|
|
|
|
if (!ide_wait (idedrv->io, 100000, true, true)) {
|
|
idedrv->current_req = NULL;
|
|
free (req);
|
|
return -ST_XDRV_WRITE_ERROR;
|
|
}
|
|
|
|
outsw (idedrv->io + IDE_REG_DATA, buffer, idedrv->sector_size / 2);
|
|
|
|
req->sector_done_count = 1;
|
|
|
|
spin_unlock (&device->lock, *lockflags);
|
|
|
|
while (!atomic_load (&req->done))
|
|
spin_lock_relax ();
|
|
|
|
spin_lock (&device->lock, lockflags);
|
|
|
|
free (req);
|
|
|
|
uint8_t ctrl = inb (idedrv->ctrl);
|
|
ctrl |= 0x02;
|
|
outb (idedrv->ctrl, ctrl);
|
|
|
|
if (idedrv->lba48)
|
|
outb (idedrv->io + IDE_REG_CMD, IDE_CMD_FLUSH48);
|
|
else
|
|
outb (idedrv->io + IDE_REG_CMD, IDE_CMD_FLUSH28);
|
|
|
|
uint8_t status;
|
|
do {
|
|
status = inb (idedrv->io + IDE_REG_STATUS);
|
|
} while (status & IDE_BSY);
|
|
|
|
if (status & (IDE_ERR | IDE_DF))
|
|
return -ST_XDRV_WRITE_ERROR;
|
|
|
|
return ST_OK;
|
|
}
|
|
|
|
int idedrv_get_device_type (struct device* device, struct proc* proc, struct reschedule_ctx* rctx,
|
|
uint64_t* lockflags, void* a1, void* a2, void* a3, void* a4) {
|
|
(void)proc, (void)rctx, (void)device, (void)a2, (void)a3, (void)a4;
|
|
|
|
if (a1 == NULL)
|
|
return -ST_BAD_ADDRESS_SPACE;
|
|
|
|
int* device_type = (int*)a1;
|
|
|
|
*device_type = XDRV_TYPE_IDEDRV;
|
|
|
|
return ST_OK;
|
|
}
|
|
|
|
int idedrv_get_sector_size (struct device* device, struct proc* proc, struct reschedule_ctx* rctx,
|
|
uint64_t* lockflags, void* a1, void* a2, void* a3, void* a4) {
|
|
(void)proc, (void)rctx, (void)a2, (void)a3, (void)a4;
|
|
|
|
if (a1 == NULL)
|
|
return -ST_BAD_ADDRESS_SPACE;
|
|
|
|
size_t* secsize = (size_t*)a1;
|
|
|
|
struct idedrv* idedrv = device->udata;
|
|
|
|
*secsize = idedrv->sector_size;
|
|
|
|
return ST_OK;
|
|
}
|
|
|
|
int idedrv_get_size (struct device* device, struct proc* proc, struct reschedule_ctx* rctx,
|
|
uint64_t* lockflags, void* a1, void* a2, void* a3, void* a4) {
|
|
(void)proc, (void)rctx, (void)a2, (void)a3, (void)a4;
|
|
|
|
if (a1 == NULL)
|
|
return -ST_BAD_ADDRESS_SPACE;
|
|
|
|
size_t* size = (size_t*)a1;
|
|
|
|
struct idedrv* idedrv = device->udata;
|
|
|
|
*size = idedrv->sector_size * idedrv->sector_count;
|
|
|
|
return ST_OK;
|
|
}
|