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Subject[PATCH 1/2] net-next: stmmac: add support for hash table size 128/256 in dwmac4
Date
1. get hash table size in hw feature reigster, and add support
for taller hash table(128/256) in dwmac4.
2. only clear PR/HMC/PM bits of GMAC_PACKET_FILTER, to avoid
side effect to functions of other bits.

Signed-off-by: Biao Huang <biao.huang@mediatek.com>
---
drivers/net/ethernet/stmicro/stmmac/common.h | 7 +--
drivers/net/ethernet/stmicro/stmmac/dwmac4.h | 4 +-
drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 50 ++++++++++++---------
drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c | 1 +
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 4 ++
5 files changed, 40 insertions(+), 26 deletions(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index 272b9ca6..709dcec 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -335,6 +335,7 @@ struct dma_features {
/* 802.3az - Energy-Efficient Ethernet (EEE) */
unsigned int eee;
unsigned int av;
+ unsigned int hash_tb_sz;
unsigned int tsoen;
/* TX and RX csum */
unsigned int tx_coe;
@@ -427,9 +428,9 @@ struct mac_device_info {
struct mii_regs mii; /* MII register Addresses */
struct mac_link link;
void __iomem *pcsr; /* vpointer to device CSRs */
- int multicast_filter_bins;
- int unicast_filter_entries;
- int mcast_bits_log2;
+ unsigned int multicast_filter_bins;
+ unsigned int unicast_filter_entries;
+ unsigned int mcast_bits_log2;
unsigned int rx_csum;
unsigned int pcs;
unsigned int pmt;
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
index eb013d5..a5eb7df 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
@@ -18,8 +18,7 @@
/* MAC registers */
#define GMAC_CONFIG 0x00000000
#define GMAC_PACKET_FILTER 0x00000008
-#define GMAC_HASH_TAB_0_31 0x00000010
-#define GMAC_HASH_TAB_32_63 0x00000014
+#define GMAC_HASH_TAB(x) (0x10 + x * 4)
#define GMAC_RX_FLOW_CTRL 0x00000090
#define GMAC_QX_TX_FLOW_CTRL(x) (0x70 + x * 4)
#define GMAC_TXQ_PRTY_MAP0 0x98
@@ -181,6 +180,7 @@ enum power_event {
#define GMAC_HW_FEAT_MIISEL BIT(0)

/* MAC HW features1 bitmap */
+#define GMAC_HW_HASH_TB_SZ GENMASK(25, 24)
#define GMAC_HW_FEAT_AVSEL BIT(20)
#define GMAC_HW_TSOEN BIT(18)
#define GMAC_HW_TXFIFOSIZE GENMASK(10, 6)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index 7e5d5db..2a41c64 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -401,41 +401,49 @@ static void dwmac4_set_filter(struct mac_device_info *hw,
struct net_device *dev)
{
void __iomem *ioaddr = (void __iomem *)dev->base_addr;
- unsigned int value = 0;
+ unsigned int value;
+ int i;
+ int numhashregs = (hw->multicast_filter_bins >> 5);
+ int mcbitslog2 = hw->mcast_bits_log2;
+
+ value = readl(ioaddr + GMAC_PACKET_FILTER);
+ value &= ~GMAC_PACKET_FILTER_PR;
+ value &= ~GMAC_PACKET_FILTER_HMC;
+ value &= ~GMAC_PACKET_FILTER_PM;

if (dev->flags & IFF_PROMISC) {
- value = GMAC_PACKET_FILTER_PR;
+ value |= GMAC_PACKET_FILTER_PR;
} else if ((dev->flags & IFF_ALLMULTI) ||
- (netdev_mc_count(dev) > HASH_TABLE_SIZE)) {
+ (netdev_mc_count(dev) > hw->multicast_filter_bins)) {
/* Pass all multi */
- value = GMAC_PACKET_FILTER_PM;
- /* Set the 64 bits of the HASH tab. To be updated if taller
- * hash table is used
- */
- writel(0xffffffff, ioaddr + GMAC_HASH_TAB_0_31);
- writel(0xffffffff, ioaddr + GMAC_HASH_TAB_32_63);
+ value |= GMAC_PACKET_FILTER_PM;
+ /* Set all the bits of the HASH tab */
+ for (i = 0; i < numhashregs; i++)
+ writel(0xffffffff, ioaddr + GMAC_HASH_TAB(i));
} else if (!netdev_mc_empty(dev)) {
- u32 mc_filter[2];
+ u32 mc_filter[8];
struct netdev_hw_addr *ha;

/* Hash filter for multicast */
- value = GMAC_PACKET_FILTER_HMC;
+ value |= GMAC_PACKET_FILTER_HMC;

memset(mc_filter, 0, sizeof(mc_filter));
netdev_for_each_mc_addr(ha, dev) {
- /* The upper 6 bits of the calculated CRC are used to
- * index the content of the Hash Table Reg 0 and 1.
+ /* The upper n bits of the calculated CRC are used to
+ * index the contents of the hash table. The number of
+ * bits used depends on the hardware configuration
+ * selected at core configuration time.
*/
- int bit_nr =
- (bitrev32(~crc32_le(~0, ha->addr, 6)) >> 26);
- /* The most significant bit determines the register
- * to use while the other 5 bits determines the bit
- * within the selected register
+ int bit_nr = bitrev32(~crc32_le(~0, ha->addr,
+ ETH_ALEN)) >> (32 - mcbitslog2);
+ /* The most significant bit determines the register to
+ * use (H/L) while the other 5 bits determine the bit
+ * within the register.
*/
- mc_filter[bit_nr >> 5] |= (1 << (bit_nr & 0x1F));
+ mc_filter[bit_nr >> 5] |= (1 << (bit_nr & 0x1f));
}
- writel(mc_filter[0], ioaddr + GMAC_HASH_TAB_0_31);
- writel(mc_filter[1], ioaddr + GMAC_HASH_TAB_32_63);
+ for (i = 0; i < numhashregs; i++)
+ writel(mc_filter[i], ioaddr + GMAC_HASH_TAB(i));
}

/* Handle multiple unicast addresses */
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
index edb6053..59afb53 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_dma.c
@@ -354,6 +354,7 @@ static void dwmac4_get_hw_feature(void __iomem *ioaddr,

/* MAC HW feature1 */
hw_cap = readl(ioaddr + GMAC_HW_FEATURE1);
+ dma_cap->hash_tb_sz = (hw_cap & GMAC_HW_HASH_TB_SZ) >> 24;
dma_cap->av = (hw_cap & GMAC_HW_FEAT_AVSEL) >> 20;
dma_cap->tsoen = (hw_cap & GMAC_HW_TSOEN) >> 18;
/* RX and TX FIFO sizes are encoded as log2(n / 128). Undo that by
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 97c5e1a..1971f9f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -4159,6 +4159,10 @@ static int stmmac_hw_init(struct stmmac_priv *priv)
priv->plat->enh_desc = priv->dma_cap.enh_desc;
priv->plat->pmt = priv->dma_cap.pmt_remote_wake_up;
priv->hw->pmt = priv->plat->pmt;
+ if (priv->dma_cap.hash_tb_sz) {
+ priv->hw->multicast_filter_bins = BIT(priv->dma_cap.hash_tb_sz) * 32;
+ priv->hw->mcast_bits_log2 = ilog2(priv->hw->multicast_filter_bins);
+ }

/* TXCOE doesn't work in thresh DMA mode */
if (priv->plat->force_thresh_dma_mode)
--
1.7.9.5
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