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Date: Fri, 19 Jul 2013 19:37:21 +0530
From: Mugunthan V N <mugunthanvnm@...com>
To: <netdev@...r.kernel.org>
CC: <davem@...emloft.net>, <linux-omap@...r.kernel.org>,
Mugunthan V N <mugunthanvnm@...com>
Subject: [net-next PATCH 1/1] drivers: net: cpsw: add support to show hw stats via ethtool get_regs
Add support to show CPSW hardware statistics to user via ethtool get_regs
ops so user can find if there were any error reported or the system is
over loaded duing hagh data rate transfer.
Signed-off-by: Mugunthan V N <mugunthanvnm@...com>
---
drivers/net/ethernet/ti/cpsw.c | 74 ++++++++++++++++++++++++++++++++++++++--
1 file changed, 71 insertions(+), 3 deletions(-)
diff --git a/drivers/net/ethernet/ti/cpsw.c b/drivers/net/ethernet/ti/cpsw.c
index 05a1674..64117f5 100644
--- a/drivers/net/ethernet/ti/cpsw.c
+++ b/drivers/net/ethernet/ti/cpsw.c
@@ -85,12 +85,14 @@ do { \
#define HOST_PORT_NUM 0
#define SLIVER_SIZE 0x40
+#define CPSW_HW_STATS_LEN 36
#define CPSW1_HOST_PORT_OFFSET 0x028
#define CPSW1_SLAVE_OFFSET 0x050
#define CPSW1_SLAVE_SIZE 0x040
#define CPSW1_CPDMA_OFFSET 0x100
#define CPSW1_STATERAM_OFFSET 0x200
+#define CPSW1_HW_STATS 0x400
#define CPSW1_CPTS_OFFSET 0x500
#define CPSW1_ALE_OFFSET 0x600
#define CPSW1_SLIVER_OFFSET 0x700
@@ -99,6 +101,7 @@ do { \
#define CPSW2_SLAVE_OFFSET 0x200
#define CPSW2_SLAVE_SIZE 0x100
#define CPSW2_CPDMA_OFFSET 0x800
+#define CPSW2_HW_STATS 0x900
#define CPSW2_STATERAM_OFFSET 0xa00
#define CPSW2_CPTS_OFFSET 0xc00
#define CPSW2_ALE_OFFSET 0xd00
@@ -332,6 +335,7 @@ struct cpsw_priv {
struct cpsw_platform_data data;
struct cpsw_ss_regs __iomem *regs;
struct cpsw_wr_regs __iomem *wr_regs;
+ void __iomem *hw_stats;
struct cpsw_host_regs __iomem *host_port_regs;
u32 msg_enable;
u32 version;
@@ -723,6 +727,64 @@ static int cpsw_set_coalesce(struct net_device *ndev,
return 0;
}
+static int cpsw_get_regs_len(struct net_device *ndev)
+{
+ int len;
+
+ len = CPSW_HW_STATS_LEN * sizeof(u32);
+ len += 2 * sizeof(struct cpdma_chan_stats);
+
+ return len;
+}
+
+static void cpsw_get_regs(struct net_device *ndev,
+ struct ethtool_regs *regs, void *p)
+{
+ struct cpsw_priv *priv = netdev_priv(ndev);
+ struct cpdma_chan_stats dma_stats;
+ u32 *reg = p;
+ int i;
+
+ /* update CPSW IP version */
+ regs->version = priv->version;
+
+ /* Packet Tx/Rx statistics */
+ for (i = 0; i < CPSW_HW_STATS_LEN; i++)
+ reg[i] = readl(((u32 *)priv->hw_stats) + i);
+
+ /* Rx DMA statistics */
+ cpdma_chan_get_stats(priv->rxch, &dma_stats);
+ reg[i++] = dma_stats.head_enqueue;
+ reg[i++] = dma_stats.tail_enqueue;
+ reg[i++] = dma_stats.pad_enqueue;
+ reg[i++] = dma_stats.misqueued;
+ reg[i++] = dma_stats.desc_alloc_fail;
+ reg[i++] = dma_stats.pad_alloc_fail;
+ reg[i++] = dma_stats.runt_receive_buff;
+ reg[i++] = dma_stats.runt_transmit_buff;
+ reg[i++] = dma_stats.empty_dequeue;
+ reg[i++] = dma_stats.busy_dequeue;
+ reg[i++] = dma_stats.good_dequeue;
+ reg[i++] = dma_stats.requeue;
+ reg[i++] = dma_stats.teardown_dequeue;
+
+ /* Tx DMA statistics */
+ cpdma_chan_get_stats(priv->txch, &dma_stats);
+ reg[i++] = dma_stats.head_enqueue;
+ reg[i++] = dma_stats.tail_enqueue;
+ reg[i++] = dma_stats.pad_enqueue;
+ reg[i++] = dma_stats.misqueued;
+ reg[i++] = dma_stats.desc_alloc_fail;
+ reg[i++] = dma_stats.pad_alloc_fail;
+ reg[i++] = dma_stats.runt_receive_buff;
+ reg[i++] = dma_stats.runt_transmit_buff;
+ reg[i++] = dma_stats.empty_dequeue;
+ reg[i++] = dma_stats.busy_dequeue;
+ reg[i++] = dma_stats.good_dequeue;
+ reg[i++] = dma_stats.requeue;
+ reg[i++] = dma_stats.teardown_dequeue;
+}
+
static inline int __show_stat(char *buf, int maxlen, const char *name, u32 val)
{
static char *leader = "........................................";
@@ -1344,9 +1406,10 @@ static void cpsw_get_drvinfo(struct net_device *ndev,
{
struct cpsw_priv *priv = netdev_priv(ndev);
- strlcpy(info->driver, "TI CPSW Driver v1.0", sizeof(info->driver));
+ strlcpy(info->driver, "cpsw", sizeof(info->driver));
strlcpy(info->version, "1.0", sizeof(info->version));
strlcpy(info->bus_info, priv->pdev->name, sizeof(info->bus_info));
+ info->regdump_len = cpsw_get_regs_len(ndev);
}
static u32 cpsw_get_msglevel(struct net_device *ndev)
@@ -1426,6 +1489,8 @@ static const struct ethtool_ops cpsw_ethtool_ops = {
.set_settings = cpsw_set_settings,
.get_coalesce = cpsw_get_coalesce,
.set_coalesce = cpsw_set_coalesce,
+ .get_regs_len = cpsw_get_regs_len,
+ .get_regs = cpsw_get_regs,
};
static void cpsw_slave_init(struct cpsw_slave *slave, struct cpsw_priv *priv,
@@ -1623,6 +1688,7 @@ static int cpsw_probe_dual_emac(struct platform_device *pdev,
priv_sl2->host_port = priv->host_port;
priv_sl2->host_port_regs = priv->host_port_regs;
priv_sl2->wr_regs = priv->wr_regs;
+ priv_sl2->hw_stats = priv->hw_stats;
priv_sl2->dma = priv->dma;
priv_sl2->txch = priv->txch;
priv_sl2->rxch = priv->rxch;
@@ -1780,7 +1846,8 @@ static int cpsw_probe(struct platform_device *pdev)
switch (priv->version) {
case CPSW_VERSION_1:
priv->host_port_regs = ss_regs + CPSW1_HOST_PORT_OFFSET;
- priv->cpts->reg = ss_regs + CPSW1_CPTS_OFFSET;
+ priv->hw_stats = ss_regs + CPSW1_HW_STATS;
+ priv->cpts->reg = ss_regs + CPSW1_CPTS_OFFSET;
dma_params.dmaregs = ss_regs + CPSW1_CPDMA_OFFSET;
dma_params.txhdp = ss_regs + CPSW1_STATERAM_OFFSET;
ale_params.ale_regs = ss_regs + CPSW1_ALE_OFFSET;
@@ -1791,7 +1858,8 @@ static int cpsw_probe(struct platform_device *pdev)
break;
case CPSW_VERSION_2:
priv->host_port_regs = ss_regs + CPSW2_HOST_PORT_OFFSET;
- priv->cpts->reg = ss_regs + CPSW2_CPTS_OFFSET;
+ priv->hw_stats = ss_regs + CPSW2_HW_STATS;
+ priv->cpts->reg = ss_regs + CPSW2_CPTS_OFFSET;
dma_params.dmaregs = ss_regs + CPSW2_CPDMA_OFFSET;
dma_params.txhdp = ss_regs + CPSW2_STATERAM_OFFSET;
ale_params.ale_regs = ss_regs + CPSW2_ALE_OFFSET;
--
1.7.9.5
--
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