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-rw-r--r--drivers/net/stmmac/common.h4
-rw-r--r--drivers/net/stmmac/dwmac1000.h2
-rw-r--r--drivers/net/stmmac/dwmac1000_core.c13
-rw-r--r--drivers/net/stmmac/dwmac100_core.c6
-rw-r--r--drivers/net/stmmac/stmmac.h4
-rw-r--r--drivers/net/stmmac/stmmac_ethtool.c2
-rw-r--r--drivers/net/stmmac/stmmac_main.c66
7 files changed, 58 insertions, 39 deletions
diff --git a/drivers/net/stmmac/common.h b/drivers/net/stmmac/common.h
index e8cbcb5c206e..673ef86a063f 100644
--- a/drivers/net/stmmac/common.h
+++ b/drivers/net/stmmac/common.h
@@ -102,8 +102,6 @@ struct stmmac_extra_stats {
#define SF_DMA_MODE 1 /* DMA STORE-AND-FORWARD Operation Mode */
-#define HW_CSUM 1
-#define NO_HW_CSUM 0
enum rx_frame_status { /* IPC status */
good_frame = 0,
discard_frame = 1,
@@ -205,6 +203,8 @@ struct stmmac_dma_ops {
struct stmmac_ops {
/* MAC core initialization */
void (*core_init) (void __iomem *ioaddr) ____cacheline_aligned;
+ /* Support checksum offload engine */
+ int (*rx_coe) (void __iomem *ioaddr);
/* Dump MAC registers */
void (*dump_regs) (void __iomem *ioaddr);
/* Handle extra events on specific interrupts hw dependent */
diff --git a/drivers/net/stmmac/dwmac1000.h b/drivers/net/stmmac/dwmac1000.h
index 8b20b19971cb..81ee4fd04386 100644
--- a/drivers/net/stmmac/dwmac1000.h
+++ b/drivers/net/stmmac/dwmac1000.h
@@ -99,7 +99,7 @@ enum inter_frame_gap {
#define GMAC_CONTROL_RE 0x00000004 /* Receiver Enable */
#define GMAC_CORE_INIT (GMAC_CONTROL_JD | GMAC_CONTROL_PS | GMAC_CONTROL_ACS | \
- GMAC_CONTROL_IPC | GMAC_CONTROL_JE | GMAC_CONTROL_BE)
+ GMAC_CONTROL_JE | GMAC_CONTROL_BE)
/* GMAC Frame Filter defines */
#define GMAC_FRAME_FILTER_PR 0x00000001 /* Promiscuous Mode */
diff --git a/drivers/net/stmmac/dwmac1000_core.c b/drivers/net/stmmac/dwmac1000_core.c
index f1f426146f40..c18c85993179 100644
--- a/drivers/net/stmmac/dwmac1000_core.c
+++ b/drivers/net/stmmac/dwmac1000_core.c
@@ -50,6 +50,18 @@ static void dwmac1000_core_init(void __iomem *ioaddr)
#endif
}
+static int dwmac1000_rx_coe_supported(void __iomem *ioaddr)
+{
+ u32 value = readl(ioaddr + GMAC_CONTROL);
+
+ value |= GMAC_CONTROL_IPC;
+ writel(value, ioaddr + GMAC_CONTROL);
+
+ value = readl(ioaddr + GMAC_CONTROL);
+
+ return !!(value & GMAC_CONTROL_IPC);
+}
+
static void dwmac1000_dump_regs(void __iomem *ioaddr)
{
int i;
@@ -202,6 +214,7 @@ static void dwmac1000_irq_status(void __iomem *ioaddr)
struct stmmac_ops dwmac1000_ops = {
.core_init = dwmac1000_core_init,
+ .rx_coe = dwmac1000_rx_coe_supported,
.dump_regs = dwmac1000_dump_regs,
.host_irq_status = dwmac1000_irq_status,
.set_filter = dwmac1000_set_filter,
diff --git a/drivers/net/stmmac/dwmac100_core.c b/drivers/net/stmmac/dwmac100_core.c
index db06c04ce480..58a914b27003 100644
--- a/drivers/net/stmmac/dwmac100_core.c
+++ b/drivers/net/stmmac/dwmac100_core.c
@@ -42,6 +42,11 @@ static void dwmac100_core_init(void __iomem *ioaddr)
#endif
}
+static int dwmac100_rx_coe_supported(void __iomem *ioaddr)
+{
+ return 0;
+}
+
static void dwmac100_dump_mac_regs(void __iomem *ioaddr)
{
pr_info("\t----------------------------------------------\n"
@@ -165,6 +170,7 @@ static void dwmac100_pmt(void __iomem *ioaddr, unsigned long mode)
struct stmmac_ops dwmac100_ops = {
.core_init = dwmac100_core_init,
+ .rx_coe = dwmac100_rx_coe_supported,
.dump_regs = dwmac100_dump_mac_regs,
.host_irq_status = dwmac100_irq_status,
.set_filter = dwmac100_set_filter,
diff --git a/drivers/net/stmmac/stmmac.h b/drivers/net/stmmac/stmmac.h
index 12d1cb00c0d7..92154ff7d702 100644
--- a/drivers/net/stmmac/stmmac.h
+++ b/drivers/net/stmmac/stmmac.h
@@ -51,7 +51,6 @@ struct stmmac_priv {
int is_gmac;
dma_addr_t dma_rx_phy;
unsigned int dma_rx_size;
- int rx_csum;
unsigned int dma_buf_sz;
struct device *device;
struct mac_device_info *hw;
@@ -92,6 +91,9 @@ struct stmmac_priv {
struct vlan_group *vlgrp;
#endif
int enh_desc;
+ int rx_coe;
+ int bugged_jumbo;
+ int no_csum_insertion;
};
#ifdef CONFIG_STM_DRIVERS
diff --git a/drivers/net/stmmac/stmmac_ethtool.c b/drivers/net/stmmac/stmmac_ethtool.c
index 63b68e61afce..b32c16ae55c6 100644
--- a/drivers/net/stmmac/stmmac_ethtool.c
+++ b/drivers/net/stmmac/stmmac_ethtool.c
@@ -209,7 +209,7 @@ u32 stmmac_ethtool_get_rx_csum(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
- return priv->rx_csum;
+ return priv->rx_coe;
}
static void
diff --git a/drivers/net/stmmac/stmmac_main.c b/drivers/net/stmmac/stmmac_main.c
index a169b1441d50..a908f7201aae 100644
--- a/drivers/net/stmmac/stmmac_main.c
+++ b/drivers/net/stmmac/stmmac_main.c
@@ -134,13 +134,6 @@ static int buf_sz = DMA_BUFFER_SIZE;
module_param(buf_sz, int, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(buf_sz, "DMA buffer size");
-/* In case of Giga ETH, we can enable/disable the COE for the
- * transmit HW checksum computation.
- * Note that, if tx csum is off in HW, SG will be still supported. */
-static int tx_coe = HW_CSUM;
-module_param(tx_coe, int, S_IRUGO | S_IWUSR);
-MODULE_PARM_DESC(tx_coe, "GMAC COE type 2 [on/off]");
-
static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
NETIF_MSG_LINK | NETIF_MSG_IFUP |
NETIF_MSG_IFDOWN | NETIF_MSG_TIMER);
@@ -569,29 +562,22 @@ static void free_dma_desc_resources(struct stmmac_priv *priv)
* stmmac_dma_operation_mode - HW DMA operation mode
* @priv : pointer to the private device structure.
* Description: it sets the DMA operation mode: tx/rx DMA thresholds
- * or Store-And-Forward capability. It also verifies the COE for the
- * transmission in case of Giga ETH.
+ * or Store-And-Forward capability.
*/
static void stmmac_dma_operation_mode(struct stmmac_priv *priv)
{
- if (!priv->is_gmac) {
- /* MAC 10/100 */
- priv->hw->dma->dma_mode(priv->ioaddr, tc, 0);
- priv->tx_coe = NO_HW_CSUM;
- } else {
- if ((priv->dev->mtu <= ETH_DATA_LEN) && (tx_coe)) {
- priv->hw->dma->dma_mode(priv->ioaddr,
- SF_DMA_MODE, SF_DMA_MODE);
- tc = SF_DMA_MODE;
- priv->tx_coe = HW_CSUM;
- } else {
- /* Checksum computation is performed in software. */
- priv->hw->dma->dma_mode(priv->ioaddr, tc,
- SF_DMA_MODE);
- priv->tx_coe = NO_HW_CSUM;
- }
- }
- tx_coe = priv->tx_coe;
+ if (likely((priv->tx_coe) && (!priv->no_csum_insertion))) {
+ /* In case of GMAC, SF mode has to be enabled
+ * to perform the TX COE. This depends on:
+ * 1) TX COE if actually supported
+ * 2) There is no bugged Jumbo frame support
+ * that needs to not insert csum in the TDES.
+ */
+ priv->hw->dma->dma_mode(priv->ioaddr,
+ SF_DMA_MODE, SF_DMA_MODE);
+ tc = SF_DMA_MODE;
+ } else
+ priv->hw->dma->dma_mode(priv->ioaddr, tc, SF_DMA_MODE);
}
/**
@@ -858,6 +844,12 @@ static int stmmac_open(struct net_device *dev)
/* Initialize the MAC Core */
priv->hw->mac->core_init(priv->ioaddr);
+ priv->rx_coe = priv->hw->mac->rx_coe(priv->ioaddr);
+ if (priv->rx_coe)
+ pr_info("stmmac: Rx Checksum Offload Engine supported\n");
+ if (priv->tx_coe)
+ pr_info("\tTX Checksum insertion supported\n");
+
priv->shutdown = 0;
/* Initialise the MMC (if present) to disable all interrupts. */
@@ -1066,7 +1058,7 @@ static netdev_tx_t stmmac_xmit(struct sk_buff *skb, struct net_device *dev)
return stmmac_sw_tso(priv, skb);
if (likely((skb->ip_summed == CHECKSUM_PARTIAL))) {
- if (likely(priv->tx_coe == NO_HW_CSUM))
+ if (unlikely((!priv->tx_coe) || (priv->no_csum_insertion)))
skb_checksum_help(skb);
else
csum_insertion = 1;
@@ -1390,6 +1382,15 @@ static int stmmac_change_mtu(struct net_device *dev, int new_mtu)
return -EINVAL;
}
+ /* Some GMAC devices have a bugged Jumbo frame support that
+ * needs to have the Tx COE disabled for oversized frames
+ * (due to limited buffer sizes). In this case we disable
+ * the TX csum insertionin the TDES and not use SF. */
+ if ((priv->bugged_jumbo) && (priv->dev->mtu > ETH_DATA_LEN))
+ priv->no_csum_insertion = 1;
+ else
+ priv->no_csum_insertion = 0;
+
dev->mtu = new_mtu;
return 0;
@@ -1510,9 +1511,6 @@ static int stmmac_probe(struct net_device *dev)
#endif
priv->msg_enable = netif_msg_init(debug, default_msg_level);
- if (priv->is_gmac)
- priv->rx_csum = 1;
-
if (flow_ctrl)
priv->flow_ctrl = FLOW_AUTO; /* RX/TX pause on */
@@ -1662,7 +1660,7 @@ static int stmmac_dvr_probe(struct platform_device *pdev)
ret = -ENODEV;
goto out;
}
- pr_info("done!\n");
+ pr_info("\tdone!\n");
if (!request_mem_region(res->start, resource_size(res),
pdev->name)) {
@@ -1705,6 +1703,8 @@ static int stmmac_dvr_probe(struct platform_device *pdev)
priv->bus_id = plat_dat->bus_id;
priv->pbl = plat_dat->pbl; /* TLI */
priv->mii_clk_csr = plat_dat->clk_csr;
+ priv->tx_coe = plat_dat->tx_coe;
+ priv->bugged_jumbo = plat_dat->bugged_jumbo;
priv->is_gmac = plat_dat->has_gmac; /* GMAC is on board */
priv->enh_desc = plat_dat->enh_desc;
priv->ioaddr = addr;
@@ -1966,8 +1966,6 @@ static int __init stmmac_cmdline_opt(char *str)
strict_strtoul(opt + 7, 0, (unsigned long *)&buf_sz);
else if (!strncmp(opt, "tc:", 3))
strict_strtoul(opt + 3, 0, (unsigned long *)&tc);
- else if (!strncmp(opt, "tx_coe:", 7))
- strict_strtoul(opt + 7, 0, (unsigned long *)&tx_coe);
else if (!strncmp(opt, "watchdog:", 9))
strict_strtoul(opt + 9, 0, (unsigned long *)&watchdog);
else if (!strncmp(opt, "flow_ctrl:", 10))
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-29 14:40:31 +0000