On Tue, 27 Aug 2024 at 12:58, Avri Altman <Avri.Altman@xxxxxxx> wrote: > > > > On 27/08/24 10:45, Avri Altman wrote: > > > >>> On 25/08/24 10:41, Avri Altman wrote: > > > >>>> Ultra Capacity SD cards (SDUC) was already introduced in SD7.0. > > > >>>> Those cards support capacity larger than 2TB and up to including 128TB. > > > >>>> Thus, the address range of the card expands beyond the 32-bit > > > >>>> command argument. To that end, a new command - CMD22 is defined, > > > >>>> to carry the extra 6-bit upper part of the 38-bit block address > > > >>>> that enable access to 128TB memory space. > > > >>>> > > > >>>> SDUC capacity is agnostic to the interface mode: UHS-I and UHS-II > > > >>>> – Same as SDXC. > > > >>>> > > > >>>> The spec defines several extensions/modifications to the current > > > >>>> SDXC cards, which we address in patches 1 - 10. Otherwise > > > >>>> requirements are out-of-scope of this change. Specifically, CMDQ > > > >>>> (CMD44+CMD45), and Extension for Video Speed Class (CMD20). > > > >>>> > > > >>>> First publication of SDUC was in [1]. This series was developed > > > >>>> and tested separately from [1] and does not borrow from it. > > > >>>> > > > >>>> [1] https://lwn.net/Articles/982566/ > > > >>> > > > >>> Perhaps add support for mmc_test > > > > Actually, I am not sure what should be added to mmc_test as far as > > > > SDUC > > > indication: > > > > from dmesg we have: > > > > [ 4253.922220] mmc0: new ultra high speed SDR104 SDUC card at > > > > address > > > > d555 [ 4253.922409] mmcblk0: mmc0:d555 SR04T 3.72 TiB > > > > > > > > Additionally, we have the card size sysfs entry: > > > > # cat /sys/block/mmcblk0/size > > > > 7999258624 > > > > > > > > As well as the csd which implies its capacity: > > > > # cd /sys/class/mmc_host/mmc0/mmc0:* && cat csd > > > > 800e0032db79007732bf7f800a404001 > > > > > > > > What test did you had in mind? > > > > > > Doesn't all the I/O need CMD22 first? > So I tried to add it, and it looks like I'll be needing 2 - 3 patches to enable mmc_test for sduc. > How about disable it for now, planning to ameliorate it in the very near future? Don't get me wrong, I am fine by this too, as Adrian. However, the purpose of adding support for SDUC to mmc_test would also be to help us test while developing the new code too. [...] Kind regards Uffe
