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authorLendacky, Thomas <Thomas.Lendacky@amd.com>2014-11-04 16:06:56 -0600
committerDavid S. Miller <davem@davemloft.net>2014-11-05 21:50:12 -0500
commit9227dc5e579b6b2ef58ad0d3d0d23ddac77846ef (patch)
treecef535601eda5a1c79f6d6d96bf2b752993d72bb /Documentation
parent174fd2597b0bd8c19fce6a97e8b0f753ef4ce7cb (diff)
downloadlinux-9227dc5e579b6b2ef58ad0d3d0d23ddac77846ef.tar.bz2
amd-xgbe: Add support for per DMA channel interrupts
This patch provides support for interrupts that are generated by the Tx/Rx DMA channel pairs of the device. This allows for Tx and Rx processing to run across multiple processsors. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/net/amd-xgbe.txt12
1 files changed, 10 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/net/amd-xgbe.txt b/Documentation/devicetree/bindings/net/amd-xgbe.txt
index 41354f730beb..26efd526d16c 100644
--- a/Documentation/devicetree/bindings/net/amd-xgbe.txt
+++ b/Documentation/devicetree/bindings/net/amd-xgbe.txt
@@ -7,7 +7,10 @@ Required properties:
- PCS registers
- interrupt-parent: Should be the phandle for the interrupt controller
that services interrupts for this device
-- interrupts: Should contain the amd-xgbe interrupt
+- interrupts: Should contain the amd-xgbe interrupt(s). The first interrupt
+ listed is required and is the general device interrupt. If the optional
+ amd,per-channel-interrupt property is specified, then one additional
+ interrupt for each DMA channel supported by the device should be specified
- clocks:
- DMA clock for the amd-xgbe device (used for calculating the
correct Rx interrupt watchdog timer value on a DMA channel
@@ -23,6 +26,9 @@ Optional properties:
- mac-address: mac address to be assigned to the device. Can be overridden
by UEFI.
- dma-coherent: Present if dma operations are coherent
+- amd,per-channel-interrupt: Indicates that Rx and Tx complete will generate
+ a unique interrupt for each DMA channel - this requires an additional
+ interrupt be configured for each DMA channel
Example:
xgbe@e0700000 {
@@ -30,7 +36,9 @@ Example:
reg = <0 0xe0700000 0 0x80000>,
<0 0xe0780000 0 0x80000>;
interrupt-parent = <&gic>;
- interrupts = <0 325 4>;
+ interrupts = <0 325 4>,
+ <0 326 1>, <0 327 1>, <0 328 1>, <0 329 1>;
+ amd,per-channel-interrupt;
clocks = <&xgbe_dma_clk>, <&xgbe_ptp_clk>;
clock-names = "dma_clk", "ptp_clk";
phy-handle = <&phy>;