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kexts: ahci: implement read support for ATA devices

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max 🍓
2023-07-09 22:02:30 +01:00
parent 3233169f25
commit c696bdf122
6 changed files with 107 additions and 5 deletions
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49
kexts/drivers/block/ahci/ata.c Normal file
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#include <socks/device.h>
#include "ahci.h"
kern_status_t ata_read_blocks(struct device *dev, sectors_t offset, size_t *count, struct iovec *vec, size_t nvec, socks_flags_t flags)
{
struct fis_reg_h2d fis = {0};
size_t c = *count;
c &= 0xFFFF;
fis.fis_type = FIS_TYPE_REG_H2D;
fis.count_l = (c & 0xFFu);
fis.count_h = (c >> 8) & 0xFFu;
fis.lba0 = offset & 0xFFu;
fis.lba1 = (offset >> 8) & 0xFFu;
fis.lba2 = (offset >> 16) & 0xFFu;
fis.lba3 = (offset >> 24) & 0xFFu;
fis.lba4 = (offset >> 32) & 0xFFu;
fis.lba5 = (offset >> 40) & 0xFFu;
fis.device = 1 << 6;
struct ahci_device *ahci_dev = dev->dev_priv;
kern_status_t status = send_ata_command_ex(ahci_dev, &fis, ATA_CMD_READ_DMA_EX, vec, nvec);
if (status == KERN_OK) {
*count = c;
} else {
*count = 0;
}
return status;
}
kern_status_t ata_write_blocks(struct device *dev, sectors_t offset, size_t *count, struct iovec *vec, size_t nvec, socks_flags_t flags)
{
return KERN_UNSUPPORTED;
}
kern_status_t ata_ioctl(struct device *dev, unsigned int req, void *argp)
{
return KERN_UNSUPPORTED;
}
struct block_device_ops ata_device_ops = {
.read_blocks = ata_read_blocks,
.write_blocks = ata_write_blocks,
.ioctl = ata_ioctl,
};