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author | Sonic Zhang <sonic.zhang@analog.com> | 2013-08-28 10:55:39 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2013-08-30 21:26:09 (GMT) |
commit | e2a240c7d3bcebf90936cc7c22c2729b3a4cec1f (patch) | |
tree | 3f64f44e21ffb77d25c5680cc92ffe579ae9648b | |
parent | 816c5b5b016acde51f0547cf1657d87cf22a6d47 (diff) | |
download | linux-e2a240c7d3bcebf90936cc7c22c2729b3a4cec1f.tar.xz |
driver:net:stmmac: Disable DMA store and forward mode if platform data force_thresh_dma_mode is set.
Some synopsys ip implementation doesn't support DMA store and forward mode,
such as BF60x. So, set force_thresh_dma_mode to use DMA thresholds only.
Update document and devicetree as well.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r-- | Documentation/devicetree/bindings/net/stmmac.txt | 5 | ||||
-rw-r--r-- | Documentation/networking/stmmac.txt | 3 | ||||
-rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 | ||||
-rw-r--r-- | drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 5 | ||||
-rw-r--r-- | include/linux/stmmac.h | 1 |
5 files changed, 17 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/net/stmmac.txt b/Documentation/devicetree/bindings/net/stmmac.txt index 261c563..eba0e5e 100644 --- a/Documentation/devicetree/bindings/net/stmmac.txt +++ b/Documentation/devicetree/bindings/net/stmmac.txt @@ -22,6 +22,11 @@ Required properties: - snps,pbl Programmable Burst Length - snps,fixed-burst Program the DMA to use the fixed burst mode - snps,mixed-burst Program the DMA to use the mixed burst mode +- snps,force_thresh_dma_mode Force DMA to use the threshold mode for + both tx and rx +- snps,force_sf_dma_mode Force DMA to use the Store and Forward + mode for both tx and rx. This flag is + ignored if force_thresh_dma_mode is set. Optional properties: - mac-address: 6 bytes, mac address diff --git a/Documentation/networking/stmmac.txt b/Documentation/networking/stmmac.txt index 654d2e5..457b8bb 100644 --- a/Documentation/networking/stmmac.txt +++ b/Documentation/networking/stmmac.txt @@ -123,6 +123,7 @@ struct plat_stmmacenet_data { int bugged_jumbo; int pmt; int force_sf_dma_mode; + int force_thresh_dma_mode; int riwt_off; void (*fix_mac_speed)(void *priv, unsigned int speed); void (*bus_setup)(void __iomem *ioaddr); @@ -159,6 +160,8 @@ Where: o pmt: core has the embedded power module (optional). o force_sf_dma_mode: force DMA to use the Store and Forward mode instead of the Threshold. + o force_thresh_dma_mode: force DMA to use the Shreshold mode other than + the Store and Forward mode. o riwt_off: force to disable the RX watchdog feature and switch to NAPI mode. o fix_mac_speed: this callback is used for modifying some syscfg registers (on ST SoCs) according to the link speed negotiated by the diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index be40691..8d4ccd3 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -1224,7 +1224,9 @@ static void free_dma_desc_resources(struct stmmac_priv *priv) */ static void stmmac_dma_operation_mode(struct stmmac_priv *priv) { - if (priv->plat->force_sf_dma_mode || priv->plat->tx_coe) { + if (priv->plat->force_thresh_dma_mode) + priv->hw->dma->dma_mode(priv->ioaddr, tc, tc); + else if (priv->plat->force_sf_dma_mode || priv->plat->tx_coe) { /* * In case of GMAC, SF mode can be enabled * to perform the TX COE in HW. This depends on: diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c index da8be6e..74a89a4 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c @@ -79,6 +79,11 @@ static int stmmac_probe_config_dt(struct platform_device *pdev, of_property_read_u32(np, "snps,pbl", &dma_cfg->pbl); dma_cfg->fixed_burst = of_property_read_bool(np, "snps,fixed-burst"); dma_cfg->mixed_burst = of_property_read_bool(np, "snps,mixed-burst"); + plat->force_thresh_dma_mode = of_property_read_bool(np, "snps,force_thresh_dma_mode"); + if (plat->force_thresh_dma_mode) { + plat->force_sf_dma_mode = 0; + pr_warn("force_sf_dma_mode is ignored if force_thresh_dma_mode is set."); + } return 0; } diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h index 9e495d31..bb5deb0 100644 --- a/include/linux/stmmac.h +++ b/include/linux/stmmac.h @@ -108,6 +108,7 @@ struct plat_stmmacenet_data { int bugged_jumbo; int pmt; int force_sf_dma_mode; + int force_thresh_dma_mode; int riwt_off; void (*fix_mac_speed)(void *priv, unsigned int speed); void (*bus_setup)(void __iomem *ioaddr); |