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amd-xgbe: Add support for per DMA channel interrupts

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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>
This commit is contained in:
Lendacky, Thomas
2014-11-04 16:06:56 -06:00
committed by David S. Miller
parent 174fd2597b
commit 9227dc5e57
5 changed files with 219 additions and 51 deletions
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10
drivers/net/ethernet/amd/xgbe/xgbe.h
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@@ -173,6 +173,7 @@
/* Device-tree clock names */
#define XGBE_DMA_CLOCK "dma_clk"
#define XGBE_PTP_CLOCK "ptp_clk"
#define XGBE_DMA_IRQS "amd,per-channel-interrupt"
/* Timestamp support - values based on 50MHz PTP clock
* 50MHz => 20 nsec
@@ -359,6 +360,12 @@ struct xgbe_channel {
unsigned int queue_index;
void __iomem *dma_regs;
/* Per channel interrupt irq number */
int dma_irq;
/* Netdev related settings */
struct napi_struct napi;
unsigned int saved_ier;
unsigned int tx_timer_active;
@@ -609,7 +616,8 @@ struct xgbe_prv_data {
/* XPCS indirect addressing mutex */
struct mutex xpcs_mutex;
int irq_number;
int dev_irq;
unsigned int per_channel_irq;
struct xgbe_hw_if hw_if;
struct xgbe_desc_if desc_if;