On 27/08/24 13:58, Avri Altman 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? Ok by me.
