Hello, Uffe!
Thanks for the info! I'll update mailing list in the next v7 version of
my patch set. I'll send it anyway to fix last comments from Adrian Hunter.
On 15.03.2024 13:55, Ulf Hansson wrote:
On Thu, 14 Mar 2024 at 15:14, Sergey Khimich <serghox@xxxxxxxxx> wrote:
Hello!
This is implementation of SDHCI CQE support for sdhci-of-dwcmshc driver.
For enabling CQE support just set 'supports-cqe' in your DevTree file
for appropriate mmc node.
Also, while implementing CQE support for the driver, I faced with a problem
which I will describe below.
According to the IP block documentation CQE works only with "AMDA-2 only"
mode which is activated only with v4 mode enabled. I see in dwcmshc_probe()
function that v4 mode gets enabled only for 'sdhci_dwcmshc_bf3_pdata'
platform data.
So my question is: is it correct to enable v4 mode for all platform data
if 'SDHCI_CAN_64BIT_V4' bit is set in hw?
Because I`m afraid that enabling v4 mode for some platforms could break
them down. On the other hand, if host controller says that it can do v4
(caps & SDHCI_CAN_64BIT_V4), lets do v4 or disable it manualy by some
quirk. Anyway - RFC.
We have just updated the bouncing addresses in MAINTAINERS for Asutosh
Das and Ritesh Harjani, that also helps maintain cqhci. Would you mind
re-submitting to allow them to have a look at this too?
Asutosh Das <quic_asutoshd@xxxxxxxxxxx>
Ritesh Harjani <ritesh.list@xxxxxxxxx>
Kind regards
Uffe
v2:
- Added dwcmshc specific cqe_disable hook to prevent losing
in-flight cmd when an ioctl is issued and cqe_disable is called;
- Added processing 128Mb boundary for the host memory data buffer size
and the data buffer. For implementing this processing an extra
callback is added to the struct 'sdhci_ops'.
- Fixed typo.
v3:
- Fix warning reported by kernel test robot:
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309270807.VoVn81m6-lkp@xxxxxxxxx/
| Closes: https://lore.kernel.org/oe-kbuild-all/202309300806.dcR19kcE-lkp@xxxxxxxxx/
v4:
- Data reset moved to custom driver tuning hook.
- Removed unnecessary dwcmshc_sdhci_cqe_disable() func
- Removed unnecessary dwcmshc_cqhci_set_tran_desc. Export and use
cqhci_set_tran_desc() instead.
- Provide a hook for cqhci_set_tran_desc() instead of cqhci_prep_tran_desc().
- Fix typo: int_clok_disable --> int_clock_disable
v5:
- Fix warning reported by kernel test robot:
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312301130.itEZhhI5-lkp@xxxxxxxxx/
v6:
- Rebase to master branch
- Fix typo;
- Fix double blank line;
- Add cqhci_suspend() and cqhci_resume() functions
to support mmc suspend-to-ram (s2r);
- Move reading DWCMSHC_P_VENDOR_AREA2 register under "supports-cqe"
condition as not all IPs have that register;
- Remove sdhci V4 mode from the list of prerequisites to init cqhci.
Sergey Khimich (2):
mmc: cqhci: Add cqhci set_tran_desc() callback
mmc: sdhci-of-dwcmshc: Implement SDHCI CQE support
drivers/mmc/host/Kconfig | 1 +
drivers/mmc/host/cqhci-core.c | 11 +-
drivers/mmc/host/cqhci.h | 4 +
drivers/mmc/host/sdhci-of-dwcmshc.c | 188 +++++++++++++++++++++++++++-
4 files changed, 199 insertions(+), 5 deletions(-)
--
2.30.2
