NTB: Add support for AMD PCI-Express Non-Transparent Bridge

xliyu · jonmason · commit a1b3695820aa · 2016-01-21T19:51:04.000-05:00
This adds support for AMD's PCI-Express Non-Transparent Bridge
(NTB) device on the Zeppelin platform. The driver connnects to the
standard NTB sub-system interface, with modification to add hooks
for power management in a separate patch. The AMD NTB device has 3
memory windows, 16 doorbell, 16 scratch-pad registers, and supports
up to 16 PCIe lanes running a Gen3 speeds.

Signed-off-by: Xiangliang Yu &lt;Xiangliang.Yu@amd.com&gt;
Reviewed-by: Allen Hubbe &lt;Allen.Hubbe@emc.com&gt;
Signed-off-by: Jon Mason &lt;jdmason@kudzu.us&gt;
diff --git a/MAINTAINERS b/MAINTAINERS
@@ -7586,6 +7586,12 @@ W:	https://github.com/jonmason/ntb/wiki
 T:	git git://github.com/jonmason/ntb.git
 F:	drivers/ntb/hw/intel/
 
+NTB AMD DRIVER
+M:	Xiangliang Yu <Xiangliang.Yu@amd.com>
+L:	linux-ntb@googlegroups.com
+S:	Supported
+F:	drivers/ntb/hw/amd/
+
 NTFS FILESYSTEM
 M:	Anton Altaparmakov <anton@tuxera.com>
 L:	linux-ntfs-dev@lists.sourceforge.net
diff --git a/drivers/ntb/hw/Kconfig b/drivers/ntb/hw/Kconfig
@@ -1 +1,2 @@
+source "drivers/ntb/hw/amd/Kconfig"
 source "drivers/ntb/hw/intel/Kconfig"
diff --git a/drivers/ntb/hw/Makefile b/drivers/ntb/hw/Makefile
@@ -1 +1,2 @@
+obj-$(CONFIG_NTB_AMD)	+= amd/
 obj-$(CONFIG_NTB_INTEL)	+= intel/
diff --git a/drivers/ntb/hw/amd/Kconfig b/drivers/ntb/hw/amd/Kconfig
@@ -0,0 +1,7 @@
+config NTB_AMD
+	tristate "AMD Non-Transparent Bridge support"
+	depends on X86_64
+	help
+	 This driver supports AMD NTB on capable Zeppelin hardware.
+
+	 If unsure, say N.
diff --git a/drivers/ntb/hw/amd/Makefile b/drivers/ntb/hw/amd/Makefile
@@ -0,0 +1 @@
+obj-$(CONFIG_NTB_AMD) += ntb_hw_amd.o
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c
diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.h b/drivers/ntb/hw/amd/ntb_hw_amd.h

Original file line number	Diff line number	Diff line change
`@@ -1 +1,2 @@`
	`1`	`+source "drivers/ntb/hw/amd/Kconfig"`
`1`	`2`	`source "drivers/ntb/hw/intel/Kconfig"`
Original file line number	Diff line number	Diff line change
`@@ -1 +1,2 @@`
	`1`	`+obj-$(CONFIG_NTB_AMD) += amd/`
`1`	`2`	`obj-$(CONFIG_NTB_INTEL) += intel/`