[U-Boot] [PATCH 5/6] net: macb: add dma_burst_length config

Ramon Fried
2019-06-11T15:19:29Z

GEM support higher DMA burst writes/reads than the default (4).
add configuration structure with dma burst length so it could be
applied later to DMA configuration.

Signed-off-by: Ramon Fried <rfried.dev@gmail.com>
---

drivers/net/macb.c | 22 +++++++++++++++++++++-
1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/drivers/net/macb.c b/drivers/net/macb.c
index ae8937bbb1..fb42172520 100644
--- a/drivers/net/macb.c
+++ b/drivers/net/macb.c
@@ -82,6 +82,7 @@ struct macb_dma_desc {

struct macb_device {
void *regs;
+ unsigned int dma_burst_length;

unsigned int rx_tail;
unsigned int tx_head;
@@ -118,6 +119,11 @@ struct macb_device {
phy_interface_t phy_interface;
#endif
};
+
+struct macb_config {
+ unsigned int dma_burst_length;
+};
+
#ifndef CONFIG_DM_ETH
#define to_macb(_nd) container_of(_nd, struct macb_device, netdev)
#endif
@@ -1133,8 +1139,13 @@ static int macb_enable_clk(struct udevice *dev)
}
#endif

+static const struct macb_config default_gem_config = {
+ .dma_burst_length = 16,
+};
+
static int macb_eth_probe(struct udevice *dev)
{
+ const struct macb_config *macb_config;
struct eth_pdata *pdata = dev_get_platdata(dev);
struct macb_device *macb = dev_get_priv(dev);
const char *phy_mode;
@@ -1151,6 +1162,11 @@ static int macb_eth_probe(struct udevice *dev)

macb->regs = (void *)pdata->iobase;

+ macb_config = (struct macb_config *)dev_get_driver_data(dev);
+ if (!macb_config)
+ macb_config = &default_gem_config;
+
+ macb->dma_burst_length = macb_config->dma_burst_length;
#ifdef CONFIG_CLK
ret = macb_enable_clk(dev);
if (ret)
@@ -1211,12 +1227,16 @@ static int macb_eth_ofdata_to_platdata(struct udevice *dev)
return macb_late_eth_ofdata_to_platdata(dev);
}

+static const struct macb_config sama5d4_config = {
+ .dma_burst_length = 4,
+};
+
static const struct udevice_id macb_eth_ids[] = {
{ .compatible = "cdns,macb" },
{ .compatible = "cdns,at91sam9260-macb" },
{ .compatible = "atmel,sama5d2-gem" },
{ .compatible = "atmel,sama5d3-gem" },
- { .compatible = "atmel,sama5d4-gem" },
+ { .compatible = "atmel,sama5d4-gem", .data = (ulong)&sama5d4_config },
{ .compatible = "cdns,zynq-gem" },
{ }
};
--
2.21.0