ENGR00288407 pcie: add pcie ep rc validation system

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_EP_MODE_IN_EP_RC_SYS is not set
  # CONFIG_EP_SELF_IO_TEST is not set
  CONFIG_RC_MODE_IN_EP_RC_SYS=y
* When build EP image,(enable if you want ep do self IO test):
  CONFIG_EP_MODE_IN_EP_RC_SYS=y
  CONFIG_EP_SELF_IO_TEST=y
  # CONFIG_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/soc0/soc.1/1ffc000.pcie/rc_memw_info
- echo 0x41000000 > /sys/devices/soc0/soc.1/1ffc000.pcie/rc_memw_start_set
- echo 0x800000 > /sys/devices/soc0/soc.1/1ffc000.pcie/rc_memw_size_set
* provide one example, howto configure the bar# and so on, when
* pcie ep emaluates one memory ram ep device

Throughput:
* To Be fine-tuned.

NOTE:
* boot up EP platform firstly, then boot up RC platform.

Signed-off-by: Richard Zhu <r65037@freescale.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/drivers/pci/host/Kconfig b/drivers/pci/host/Kconfig
index 94024195e66b..4e81a8d7eef5 100644
--- a/drivers/pci/host/Kconfig
+++ b/drivers/pci/host/Kconfig
@@ -20,6 +20,18 @@ config PCI_IMX6
         select PCIEPORTBUS
         select PCIE_DW
 
+config EP_MODE_IN_EP_RC_SYS
+        bool "PCI Express EP mode in the IMX6 RC/EP interconnection system"
+        depends on PCI_IMX6
+
+config EP_SELF_IO_TEST
+        bool "PCI Express EP_SELF_IO_TEST in EP mode"
+        depends on EP_MODE_IN_EP_RC_SYS
+
+config RC_MODE_IN_EP_RC_SYS
+        bool "PCI Express RC mode in the IMX6 RC/EP interconnection system"
+        depends on PCI_IMX6
+
 config PCI_TEGRA
         bool "NVIDIA Tegra PCIe controller"
         depends on ARCH_TEGRA