On Tue, Jul 13, 2021 at 12:54:22PM +0700, Quan Nguyen wrote: > This series add support the SSIF BMC driver which is to perform in-band > IPMI communication with their host in management (BMC) side. Per the kernel build robot, looks like patch 3 introduces slave_enable() but patch 1 uses it. -corey > > SSIF BMC driver in this series is tested with Aspeed AST2500. > > v4: > + Fix recursive spinlock [Graeme] > + Send response with Completion code 0xFF when aborting [Quan] > + Fix warning with dt_binding_check [Rob] > + Change aspeed-ssif-bmc.yaml to ssif-bmc.yaml [Quan] > + Added bounding check on SMBus writes and the whole request [Dan] > + Moved buffer to end of struct ssif_bmc_ctx to avoid context > corruption if somehow buffer is written past the end [Dan] > + Return -EINVAL if userspace buffer too small, dont > silence truncate [Corey, Joel] > + Not necessary to check NONBLOCK in lock [Corey] > + Enforce one user at a time [Joel] > + Reject write with invalid response length from userspace [Corey] > + Add state machines for better ssif bmc state handling [Quan] > + Drop ssif_bmc_aspeed.c and make ssif_bmc.c is generic > SSIF BMC driver [Quan] > + Change compatible string "aspeed,ast2500-ssif-bmc" to > "ampere,ssif-bmc" [Quan] > + Toggle Slave enable in i2c-aspeed to turn on/off slave mode [Ryan] > + Added slave_enable() to struct i2c_algorithm to control > slave mode and to address the recursive spinlock [Graeme, Ryan] > + Abort current request with invalid SMBus write or > invalid command [Quan] > + Abort all request if there is pending response [Quan] > + Changed validate_pec() to validate_request() [Quan] > + Add unsupported_smbus_cmd() to handle unknown SMBus command [Quan] > + Print internal state string for ease investigating issue [Quan] > + Move to READY state on SLAVE_STOP event [Quan] > + Change initilize_transfer() to process_smbus_cmd() [Quan] > + Introduce functions for each slave event [Quan] > > v3: > + Switched binding doc to use DT schema format [Rob] > + Splited into generic ssif_bmc and aspeed-specific [Corey, Joel] > + Removed redundant license info [Joel] > + Switched to use traditional if-else [Joel] > + Removed unused ssif_bmc_ioctl() [Joel] > + Made handle_request()/complete_response() to return void [Joel] > + Refactored send_ssif_bmc_response()/receive_ssif_bmc_request() > [Corey] > + Remove mutex [Corey] > + Use spin_lock/unlock_irqsave/restore in callback [Corey] > + Removed the unnecessary memset [Corey] > + Switch to use dev_err() [Corey] > + Combine mask/unmask two interrupts together [Corey] > + Fixed unhandled Tx done with NAK [Quan] > + Late ack'ed Tx done w/wo Ack irq [Quan] > + Use aspeed-specific exported aspeed_set_slave_busy() when slave busy > to fix the deadlock [Graeme, Philipp, Quan] > + Clean buffer for last multipart read [Quan] > + Handle unknown incoming command [Quan] > > v2: > + Fixed compiling error with COMPILE_TEST for arc > > Quan Nguyen (3): > ipmi: ssif_bmc: Add SSIF BMC driver > bindings: ipmi: Add binding for SSIF BMC driver > i2c: aspeed: Add slave_enable() to toggle slave mode > > .../devicetree/bindings/ipmi/ssif-bmc.yaml | 38 + > drivers/char/ipmi/Kconfig | 11 + > drivers/char/ipmi/Makefile | 1 + > drivers/char/ipmi/ssif_bmc.c | 781 ++++++++++++++++++ > drivers/char/ipmi/ssif_bmc.h | 106 +++ > drivers/i2c/busses/i2c-aspeed.c | 20 + > include/linux/i2c.h | 2 + > 7 files changed, 959 insertions(+) > create mode 100644 Documentation/devicetree/bindings/ipmi/ssif-bmc.yaml > create mode 100644 drivers/char/ipmi/ssif_bmc.c > create mode 100644 drivers/char/ipmi/ssif_bmc.h > > -- > 2.28.0 >
