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zynqmp: gem: Flush the rx buffers while transmitting 

Flush and invalidate the rx buffers while sending the
tx packet it self as armv8 does flush also while doing
invalidation.

Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
This commit is contained in:
Siva Durga Prasad Paladugu 2014-12-06 12:57:53 +05:30 committed by Michal Simek
parent 8a584c8a7f
commit 96f4f14964
1 changed files with 7 additions and 3 deletions
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10
drivers/net/zynq_gem.c
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@ -20,6 +20,7 @@
#include <phy.h>
#include <miiphy.h>
#include <watchdog.h>
#include <asm/system.h>
#include <asm/arch/hardware.h>
#include <asm/arch/sys_proto.h>
@ -408,6 +409,11 @@ static int zynq_gem_send(struct eth_device *dev, void *ptr, int len)
addr &= ~(ARCH_DMA_MINALIGN - 1);
size = roundup(len, ARCH_DMA_MINALIGN);
flush_dcache_range(addr, addr + size);
addr = (u32)priv->rxbuffers;
addr &= ~(ARCH_DMA_MINALIGN - 1);
size = roundup((RX_BUF * PKTSIZE_ALIGN), ARCH_DMA_MINALIGN);
flush_dcache_range(addr, addr + size);
barrier();
/* Start transmit */
@ -443,8 +449,6 @@ static int zynq_gem_recv(struct eth_device *dev)
if (frame_len) {
u32 addr = current_bd->addr & ZYNQ_GEM_RXBUF_ADD_MASK;
addr &= ~(ARCH_DMA_MINALIGN - 1);
u32 size = roundup(frame_len, ARCH_DMA_MINALIGN);
invalidate_dcache_range(addr, addr + size);
net_process_received_packet((u8 *)addr, frame_len);
@ -518,7 +522,7 @@ int zynq_gem_initialize(bd_t *bis, phys_addr_t base_addr,
priv->rxbuffers = memalign(ARCH_DMA_MINALIGN, RX_BUF * PKTSIZE_ALIGN);
memset(priv->rxbuffers, 0, RX_BUF * PKTSIZE_ALIGN);
/* Align bd_space to 1MB */
/* Align bd_space to MMU_SECTION_SHIFT */
bd_space = memalign(1 << MMU_SECTION_SHIFT, BD_SPACE);
mmu_set_region_dcache_behaviour((phys_addr_t)bd_space,
BD_SPACE, DCACHE_OFF);