Commits
Richard Zhu committed 234cd0f51cd
ENGR00257661 pcie: imx: pcie ep/rc validation HW setup: * Two i.MX6Q SD boards, one is used as PCIe RC, the other is used as PCIe EP. Connected by 2*mini_PCIe to standard_PCIe adaptors, 2*PEX cable adaptors, One PCIe cable. SW setup: * When build RC image, make sure that CONFIG_IMX_PCIE=y # CONFIG_IMX_PCIE_EP_MODE_IN_EP_RC_SYS is not set CONFIG_IMX_PCIE_RC_MODE_IN_EP_RC_SYS=y * When build EP image, make sure that CONFIG_IMX_PCIE=y CONFIG_IMX_PCIE_EP_MODE_IN_EP_RC_SYS=y # CONFIG_IMX_PCIE_RC_MODE_IN_EP_RC_SYS is not set Features: * Set-up link between RC and EP by their stand-alone 125MHz running internally. * In EP's system, EP can access the reserved ddr memory (default address:0x40000000) of PCIe RC's system, by the interconnection between PCIe EP and PCIe RC. * add the configuration methods in the EP side, used to configure the start address and the size of the reserved RC's memory window. - cat /sys/devices/platform/imx-pcie/rc_memw_info - echo 0x41000000 > /sys/devices/platform/imx-pcie/rc_memw_start_set - echo 0x800000 > /sys/devices/platform/imx-pcie/rc_memw_size_set Throughput: * when enable the EP_SELF_IO_TEST, and ARM core used as the bus master: write speed ~300MB/s, read speed ~100MB/s. * IPU used as the bus master: write speed ~344MB/s, read speed ~211MB/s. Signed-off-by: Richard Zhu <r65037@freescale.com>