[U-Boot] [PATCH 2/4] zynqmp: gem: Flush the rx buffers while transmitting

Michal Simek
2015-05-26T11:40:12Z

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>
---

drivers/net/zynq_gem.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/net/zynq_gem.c b/drivers/net/zynq_gem.c
index 22195805e6d6..523f95ccfde4 100644
--- a/drivers/net/zynq_gem.c
+++ b/drivers/net/zynq_gem.c
@@ -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);
--
2.3.5