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Merge pull request #145 from streaksu/trunk

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disk: Make disk_read_sectors() return errors instead of bool
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mint 2022-01-03 19:14:50 +01:00 committed by GitHub
commit 8f84178dbe
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3 changed files with 29 additions and 12 deletions
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8
stage23/drivers/disk.h
View File

@ -14,7 +14,13 @@ struct volume *disk_volume_from_efi_handle(EFI_HANDLE efi_handle);
#endif
enum {
DISK_SUCCESS,
DISK_NO_MEDIA,
DISK_FAILURE
};
void disk_create_index(void);
bool disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t count);
int disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t count);
#endif

19
stage23/drivers/disk.s2.c
View File

@ -89,7 +89,7 @@ static size_t fastest_xfer_size(struct volume *volume) {
return fastest_size;
}
bool disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t count) {
int disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t count) {
struct dap dap = {0};
if (count * volume->sector_size > XFER_BUF_SIZE)
@ -113,13 +113,13 @@ bool disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t
rm_int(0x13, &r, &r);
if (r.eflags & EFLAGS_CF) {
return false;
return DISK_FAILURE;
}
if (buf != NULL)
memcpy(buf, xfer_buf, count * volume->sector_size);
return true;
return DISK_SUCCESS;
}
void disk_create_index(void) {
@ -163,7 +163,7 @@ void disk_create_index(void) {
if (drive_params.info_flags & (1 << 2) && drive > 0x8f) {
// The medium could not be present (e.g.: CD-ROMs)
// Do a test run to see if we can actually read it
if (!disk_read_sectors(block, NULL, 0, 1)) {
if (disk_read_sectors(block, NULL, 0, 1) != DISK_SUCCESS) {
continue;
}
block->index = optical_indices++;
@ -200,17 +200,18 @@ void disk_create_index(void) {
#if uefi == 1
bool disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t count) {
int disk_read_sectors(struct volume *volume, void *buf, uint64_t block, size_t count) {
EFI_STATUS status;
status = volume->block_io->ReadBlocks(volume->block_io,
volume->block_io->Media->MediaId,
block, count * volume->sector_size, buf);
if (status != 0) {
return false;
switch (status) {
case EFI_SUCCESS: return DISK_SUCCESS;
case EFI_NO_MEDIA: return DISK_NO_MEDIA;
default: return DISK_FAILURE;
}
return true;
}
static alignas(4096) uint8_t unique_sector_pool[8192];

14
stage23/lib/part.s2.c
View File

@ -34,15 +34,25 @@ static bool cache_block(struct volume *volume, uint64_t block) {
uint64_t xfer_size = volume->fastest_xfer_size;
while (!disk_read_sectors(volume, volume->cache,
for (;;) {
int ret = disk_read_sectors(volume, volume->cache,
first_sect + block * volume->fastest_xfer_size,
xfer_size)) {
xfer_size);
switch (ret) {
case DISK_NO_MEDIA:
return false;
case DISK_SUCCESS:
goto disk_success;
}
xfer_size--;
if (xfer_size == 0) {
return false;
}
}
disk_success:
volume->cache_status = CACHE_READY;
volume->cached_block = block;