Rockbox open source high quality audio player as a Music Player Daemon
mpris
rockbox
mpd
libadwaita
audio
rust
zig
deno
ata: Prefer using "virtual" sector size where possible
Normally, if a device uses larger physical sector size than the logical
size and supports so-called "512e" mode, we let the device deal with
partial sector reads/writes.
However, if MAX_VIRT_SECTOR_SIZE is defined, we support
partitioning/filesystems that use a larger "virtual" sector than the
logical sector. typically this matches the physical sector size of the
drive, which means that despite a small logical sector size, all I/O
is done in terms of the physical sector size.
Therefore, when MAX_VIRT_SECTOR_SIZE and MAX_PHYS_SECTOR_SIZE are
enabled (currently only ipod5g and ipod6g), prefer software-based
partial sector I/O.
Change-Id: I0815ad0a2f987b89bb2debfbf3d0ed64cdf85525
+24
+5
firmware/common/disk.c
+5
firmware/common/disk.c
+15
firmware/drivers/ata-common.c
+15
firmware/drivers/ata-common.c
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/* Check if drive really needs emulation - if we can access
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sector 1 then assume the drive supports "512e" and will handle
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it better than us, so ignore the large physical sectors.
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The exception here is if the device is partitioned to use
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larger-than-logical "virtual" sectors; in that case we will
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use whichever one (ie physical/"virtual") is larger.
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*/
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char throwaway[__MAX_VARIABLE_LOG_SECTOR];
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rc = ata_transfer_sectors(1, 1, &throwaway, false);
···
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memset(§or_cache, 0, sizeof(sector_cache));
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return 0;
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}
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void ata_set_phys_sector_mult(unsigned int mult)
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{
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unsigned int max = MAX_PHYS_SECTOR_SIZE/log_sector_size;
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/* virtual sector could be larger than pyhsical sector */
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if (!mult || mult > max)
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mult = max;
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/* It needs to be at _least_ the size of the real multiplier */
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if (mult > phys_sector_mult)
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phys_sector_mult = mult;
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}
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#endif /* MAX_PHYS_SECTOR_SIZE */