Messages in this thread | | | Date | Thu, 24 Sep 2015 00:26:24 +0200 | Subject | Re: [PATCH V4] mmc: block: Add new ioctl to send multi commands | From | Ulf Hansson <> |
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On 24 September 2015 at 00:06, Grant Grundler <grundler@google.com> wrote: > On Wed, Sep 23, 2015 at 2:42 PM, Ulf Hansson <ulf.hansson@linaro.org> wrote: >> On 22 September 2015 at 11:27, Jon Hunter <jonathanh@nvidia.com> wrote: >>> Certain eMMC devices allow vendor specific device information to be read >>> via a sequence of vendor commands. These vendor commands must be issued >>> in sequence and an atomic fashion. One way to support this would be to >>> add an ioctl function for sending a sequence of commands to the device >>> atomically as proposed here. These multi commands are simple array of >>> the existing mmc_ioc_cmd structure. >>> >>> The structure passed via the ioctl uses a __u64 type to specify the number >>> of commands (so that the structure is aligned on a 64-bit boundary) and a >>> zero length array as a header for list of commands to be issued. The >>> maximum number of commands that can be sent is determined by >>> MMC_IOC_MAX_CMDS (which defaults to 255 and should be more than >>> sufficient). >>> >>> This based upon work by Seshagiri Holi <sholi@nvidia.com>. >>> >>> Signed-off-by: Seshagiri Holi <sholi@nvidia.com> >>> Signed-off-by: Jon Hunter <jonathanh@nvidia.com> >> >> Thanks, applied for next! > > Ulf, > is the git repo visible publicly?
git://git.linaro.org/people/ulf.hansson/mmc.git
> > Your linaro.org mmc.git seems to be stale and Chris Ball's tree on > kernel.org is the only other mention of mmc I'm finding.
Chris' tree hasn't been used for a long time.
> > cheers > grant
Kind regards Uffe
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