Intel OpenBMC Linux kernel source tree (mirror) https://git.radix-linux.su/BMC/Intel-BMC/linux.git/atom?h=dev-5.8-intel 2020-08-06T00:30:34+00:00 2020-08-06T00:30:34+00:00 Eddie James eajames@linux.ibm.com 2020-05-05T16:58:21+00:00 urn:sha1:a6f50f1aeb50cc92756a720b2bc42516d482ea5a Users of the XDMA engine need a way to reset it if something goes wrong. Problems on the host side, or user error, such as incorrect host address, may result in the DMA operation never completing and no way to determine what went wrong. Therefore, add an ioctl to reset the engine so that users can recover in this situation. OpenBMC-Staging-Count: 2 Signed-off-by: Eddie James <eajames@linux.ibm.com> Acked-by: Andrew Jeffery <andrew@aj.id.au> Signed-off-by: Joel Stanley <joel@jms.id.au> 2020-08-06T00:30:34+00:00 Eddie James eajames@linux.ibm.com 2020-05-05T16:58:19+00:00 urn:sha1:8bdaf5d46b2ff9fcb3b05a31afeb7e71c5e82fef The XDMA engine embedded in the AST2500 and AST2600 SOCs performs PCI DMA operations between the SOC (acting as a BMC) and a host processor in a server. This commit adds a driver to control the XDMA engine and adds functions to initialize the hardware and memory and start DMA operations. OpenBMC-Staging-Count: 2 Signed-off-by: Eddie James <eajames@linux.ibm.com> Reviewed-by: Andrew Jeffery <andrew@aj.id.au> Signed-off-by: Joel Stanley <joel@jms.id.au>