On 2023-04-20 at 12:13:24 +0100, Lee Jones wrote: > On Fri, 21 Apr 2023, Xu Yilun wrote: > > > On 2023-04-17 at 12:26:53 +0300, Ilpo Järvinen wrote: > > > On some MAX 10 cards, the BMC firmware is not available to service > > > handshake registers during secure update erase and write phases at > > > normal speeds. This problem affects at least hwmon driver. When the MAX > > > 10 hwmon driver tries to read the sensor values during a secure update, > > > the reads are slowed down (e.g., reading all D5005 sensors takes ~24s > > > which is magnitudes worse than the normal <0.02s). > > > > > > Manage access to the handshake registers using a rw semaphore and a FW > > > state variable to prevent accesses during those secure update phases > > > and return -EBUSY instead. > > > > > > If handshake_sys_reg_nranges == 0, don't update bwcfw_state as it is not > > > used. This avoids the locking cost. > > > > > > Co-developed-by: Russ Weight <russell.h.weight@xxxxxxxxx> > > > Signed-off-by: Russ Weight <russell.h.weight@xxxxxxxxx> > > > Co-developed-by: Xu Yilun <yilun.xu@xxxxxxxxx> > > > Signed-off-by: Xu Yilun <yilun.xu@xxxxxxxxx> > > > Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@xxxxxxxxxxxxxxx> > > > > Reviewed-by: Xu Yilun <yilun.xu@xxxxxxxxx> > > > > Hi Lee: > > > > Could the fpga part also been applied to mfd tree when everyone is good? > > Yes, with an Acked-by it can. Acked-by: Xu Yilun <yilun.xu@xxxxxxxxx> > > -- > Lee Jones [李琼斯]
