Commit Graph

7 Commits

Author SHA1 Message Date
Ilpo Järvinen 867cae44f8 mfd: intel-m10-bmc: Manage access to MAX 10 fw handshake registers
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@intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Co-developed-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230417092653.16487-5-ilpo.jarvinen@linux.intel.com
2023-06-15 09:19:36 +01:00
Ilpo Järvinen e9c154eed8 mfd: intel-m10-bmc: Move m10bmc_sys_read() away from header
Move m10bmc_sys_read() out from the header to prepare it for adding
more code into the function which would make it too large to be a
static inline any more.

While at it, replace the vague wording in function comment with more
precise statements.

Reviewed-by: Russ Weight <russell.h.weight@intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net> # For hwmon
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230417092653.16487-4-ilpo.jarvinen@linux.intel.com
2023-06-15 09:19:36 +01:00
Ilpo Järvinen c452e3bd91 mfd: intel-m10-bmc: Create m10bmc_sys_update_bits()
Wrap regmap_update_bits() with m10bmc_sys_update_bits() in order to be
able to add additional checks into it.

Co-developed-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230417092653.16487-3-ilpo.jarvinen@linux.intel.com
2023-06-15 09:19:36 +01:00
Ilpo Järvinen b3ecc7f383 mfd: intel-m10-bmc: Move core symbols to own namespace
Create INTEL_M10_BMC_CORE namespace for symbols exported by
intel-m10-bmc-core.

Reviewed-by: Russ Weight <russell.h.weight@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Reviewed-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230417092653.16487-2-ilpo.jarvinen@linux.intel.com
2023-06-15 09:19:36 +01:00
Ilpo Järvinen bcababfc60 mfd: intel-m10-bmc: Prefix register defines with M10BMC_N3000
Prefix the M10BMC defines register defines with M10BMC_N3000 to make it
more obvious these are related to some board type. All current
non-N3000 board types have the same layout so they'll be reused. The
less generic makes it more obvious they're not meant for the
generic/interface agnostic code.

Reviewed-by: Russ Weight <russell.h.weight@intel.com>
Reviewed-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230116100845.6153-8-ilpo.jarvinen@linux.intel.com
2023-01-27 10:37:51 +00:00
Ilpo Järvinen 6052a005ca mfd: intel-m10-bmc: Support multiple CSR register layouts
There are different addresses for the MAX10 CSR registers. Introducing
a new data structure m10bmc_csr_map for the register definition of
MAX10 CSR.

Provide the csr_map for SPI.

Co-developed-by: Tianfei zhang <tianfei.zhang@intel.com>
Signed-off-by: Tianfei zhang <tianfei.zhang@intel.com>
Reviewed-by: Russ Weight <russell.h.weight@intel.com>
Reviewed-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230116100845.6153-6-ilpo.jarvinen@linux.intel.com
2023-01-27 10:36:29 +00:00
Ilpo Järvinen 603aed8ffd mfd: intel-m10-bmc: Split into core and spi specific parts
Split the common code from intel-m10-bmc driver into intel-m10-bmc-core
and move the SPI bus parts into an interface specific file.

intel-m10-bmc-core becomes the core MFD functions which can support
multiple bus interface like SPI bus.

Co-developed-by: Tianfei zhang <tianfei.zhang@intel.com>
Signed-off-by: Tianfei zhang <tianfei.zhang@intel.com>
Reviewed-by: Russ Weight <russell.h.weight@intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net> # hwmon
Reviewed-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Lee Jones <lee@kernel.org>
Link: https://lore.kernel.org/r/20230116100845.6153-5-ilpo.jarvinen@linux.intel.com
2023-01-27 10:35:00 +00:00