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-rw-r--r--drivers/net/ethernet/mediatek/mtk_eth_soc.c215
-rw-r--r--drivers/net/ethernet/mediatek/mtk_eth_soc.h75
2 files changed, 265 insertions, 25 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 522fe8dda6c3..18600cbbb907 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -820,11 +820,51 @@ drop:
return NETDEV_TX_OK;
}
+static struct mtk_rx_ring *mtk_get_rx_ring(struct mtk_eth *eth)
+{
+ int i;
+ struct mtk_rx_ring *ring;
+ int idx;
+
+ if (!eth->hwlro)
+ return &eth->rx_ring[0];
+
+ for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) {
+ ring = &eth->rx_ring[i];
+ idx = NEXT_RX_DESP_IDX(ring->calc_idx, ring->dma_size);
+ if (ring->dma[idx].rxd2 & RX_DMA_DONE) {
+ ring->calc_idx_update = true;
+ return ring;
+ }
+ }
+
+ return NULL;
+}
+
+static void mtk_update_rx_cpu_idx(struct mtk_eth *eth)
+{
+ struct mtk_rx_ring *ring;
+ int i;
+
+ if (!eth->hwlro) {
+ ring = &eth->rx_ring[0];
+ mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg);
+ } else {
+ for (i = 0; i < MTK_MAX_RX_RING_NUM; i++) {
+ ring = &eth->rx_ring[i];
+ if (ring->calc_idx_update) {
+ ring->calc_idx_update = false;
+ mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg);
+ }
+ }
+ }
+}
+
static int mtk_poll_rx(struct napi_struct *napi, int budget,
struct mtk_eth *eth)
{
- struct mtk_rx_ring *ring = &eth->rx_ring;
- int idx = ring->calc_idx;
+ struct mtk_rx_ring *ring;
+ int idx;
struct sk_buff *skb;
u8 *data, *new_data;
struct mtk_rx_dma *rxd, trxd;
@@ -836,7 +876,11 @@ static int mtk_poll_rx(struct napi_struct *napi, int budget,
dma_addr_t dma_addr;
int mac = 0;
- idx = NEXT_RX_DESP_IDX(idx);
+ ring = mtk_get_rx_ring(eth);
+ if (unlikely(!ring))
+ goto rx_done;
+
+ idx = NEXT_RX_DESP_IDX(ring->calc_idx, ring->dma_size);
rxd = &ring->dma[idx];
data = ring->data[idx];
@@ -907,12 +951,13 @@ release_desc:
done++;
}
+rx_done:
if (done) {
/* make sure that all changes to the dma ring are flushed before
* we continue
*/
wmb();
- mtk_w32(eth, ring->calc_idx, MTK_PRX_CRX_IDX0);
+ mtk_update_rx_cpu_idx(eth);
}
return done;
@@ -1135,32 +1180,41 @@ static void mtk_tx_clean(struct mtk_eth *eth)
}
}
-static int mtk_rx_alloc(struct mtk_eth *eth)
+static int mtk_rx_alloc(struct mtk_eth *eth, int ring_no, int rx_flag)
{
- struct mtk_rx_ring *ring = &eth->rx_ring;
+ struct mtk_rx_ring *ring = &eth->rx_ring[ring_no];
+ int rx_data_len, rx_dma_size;
int i;
- ring->frag_size = mtk_max_frag_size(ETH_DATA_LEN);
+ if (rx_flag == MTK_RX_FLAGS_HWLRO) {
+ rx_data_len = MTK_MAX_LRO_RX_LENGTH;
+ rx_dma_size = MTK_HW_LRO_DMA_SIZE;
+ } else {
+ rx_data_len = ETH_DATA_LEN;
+ rx_dma_size = MTK_DMA_SIZE;
+ }
+
+ ring->frag_size = mtk_max_frag_size(rx_data_len);
ring->buf_size = mtk_max_buf_size(ring->frag_size);
- ring->data = kcalloc(MTK_DMA_SIZE, sizeof(*ring->data),
+ ring->data = kcalloc(rx_dma_size, sizeof(*ring->data),
GFP_KERNEL);
if (!ring->data)
return -ENOMEM;
- for (i = 0; i < MTK_DMA_SIZE; i++) {
+ for (i = 0; i < rx_dma_size; i++) {
ring->data[i] = netdev_alloc_frag(ring->frag_size);
if (!ring->data[i])
return -ENOMEM;
}
ring->dma = dma_alloc_coherent(eth->dev,
- MTK_DMA_SIZE * sizeof(*ring->dma),
+ rx_dma_size * sizeof(*ring->dma),
&ring->phys,
GFP_ATOMIC | __GFP_ZERO);
if (!ring->dma)
return -ENOMEM;
- for (i = 0; i < MTK_DMA_SIZE; i++) {
+ for (i = 0; i < rx_dma_size; i++) {
dma_addr_t dma_addr = dma_map_single(eth->dev,
ring->data[i] + NET_SKB_PAD,
ring->buf_size,
@@ -1171,27 +1225,30 @@ static int mtk_rx_alloc(struct mtk_eth *eth)
ring->dma[i].rxd2 = RX_DMA_PLEN0(ring->buf_size);
}
- ring->calc_idx = MTK_DMA_SIZE - 1;
+ ring->dma_size = rx_dma_size;
+ ring->calc_idx_update = false;
+ ring->calc_idx = rx_dma_size - 1;
+ ring->crx_idx_reg = MTK_PRX_CRX_IDX_CFG(ring_no);
/* make sure that all changes to the dma ring are flushed before we
* continue
*/
wmb();
- mtk_w32(eth, eth->rx_ring.phys, MTK_PRX_BASE_PTR0);
- mtk_w32(eth, MTK_DMA_SIZE, MTK_PRX_MAX_CNT0);
- mtk_w32(eth, eth->rx_ring.calc_idx, MTK_PRX_CRX_IDX0);
- mtk_w32(eth, MTK_PST_DRX_IDX0, MTK_PDMA_RST_IDX);
+ mtk_w32(eth, ring->phys, MTK_PRX_BASE_PTR_CFG(ring_no));
+ mtk_w32(eth, rx_dma_size, MTK_PRX_MAX_CNT_CFG(ring_no));
+ mtk_w32(eth, ring->calc_idx, ring->crx_idx_reg);
+ mtk_w32(eth, MTK_PST_DRX_IDX_CFG(ring_no), MTK_PDMA_RST_IDX);
return 0;
}
-static void mtk_rx_clean(struct mtk_eth *eth)
+static void mtk_rx_clean(struct mtk_eth *eth, int ring_no)
{
- struct mtk_rx_ring *ring = &eth->rx_ring;
+ struct mtk_rx_ring *ring = &eth->rx_ring[ring_no];
int i;
if (ring->data && ring->dma) {
- for (i = 0; i < MTK_DMA_SIZE; i++) {
+ for (i = 0; i < ring->dma_size; i++) {
if (!ring->data[i])
continue;
if (!ring->dma[i].rxd1)
@@ -1208,13 +1265,98 @@ static void mtk_rx_clean(struct mtk_eth *eth)
if (ring->dma) {
dma_free_coherent(eth->dev,
- MTK_DMA_SIZE * sizeof(*ring->dma),
+ ring->dma_size * sizeof(*ring->dma),
ring->dma,
ring->phys);
ring->dma = NULL;
}
}
+static int mtk_hwlro_rx_init(struct mtk_eth *eth)
+{
+ int i;
+ u32 ring_ctrl_dw1 = 0, ring_ctrl_dw2 = 0, ring_ctrl_dw3 = 0;
+ u32 lro_ctrl_dw0 = 0, lro_ctrl_dw3 = 0;
+
+ /* set LRO rings to auto-learn modes */
+ ring_ctrl_dw2 |= MTK_RING_AUTO_LERAN_MODE;
+
+ /* validate LRO ring */
+ ring_ctrl_dw2 |= MTK_RING_VLD;
+
+ /* set AGE timer (unit: 20us) */
+ ring_ctrl_dw2 |= MTK_RING_AGE_TIME_H;
+ ring_ctrl_dw1 |= MTK_RING_AGE_TIME_L;
+
+ /* set max AGG timer (unit: 20us) */
+ ring_ctrl_dw2 |= MTK_RING_MAX_AGG_TIME;
+
+ /* set max LRO AGG count */
+ ring_ctrl_dw2 |= MTK_RING_MAX_AGG_CNT_L;
+ ring_ctrl_dw3 |= MTK_RING_MAX_AGG_CNT_H;
+
+ for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) {
+ mtk_w32(eth, ring_ctrl_dw1, MTK_LRO_CTRL_DW1_CFG(i));
+ mtk_w32(eth, ring_ctrl_dw2, MTK_LRO_CTRL_DW2_CFG(i));
+ mtk_w32(eth, ring_ctrl_dw3, MTK_LRO_CTRL_DW3_CFG(i));
+ }
+
+ /* IPv4 checksum update enable */
+ lro_ctrl_dw0 |= MTK_L3_CKS_UPD_EN;
+
+ /* switch priority comparison to packet count mode */
+ lro_ctrl_dw0 |= MTK_LRO_ALT_PKT_CNT_MODE;
+
+ /* bandwidth threshold setting */
+ mtk_w32(eth, MTK_HW_LRO_BW_THRE, MTK_PDMA_LRO_CTRL_DW2);
+
+ /* auto-learn score delta setting */
+ mtk_w32(eth, MTK_HW_LRO_REPLACE_DELTA, MTK_PDMA_LRO_ALT_SCORE_DELTA);
+
+ /* set refresh timer for altering flows to 1 sec. (unit: 20us) */
+ mtk_w32(eth, (MTK_HW_LRO_TIMER_UNIT << 16) | MTK_HW_LRO_REFRESH_TIME,
+ MTK_PDMA_LRO_ALT_REFRESH_TIMER);
+
+ /* set HW LRO mode & the max aggregation count for rx packets */
+ lro_ctrl_dw3 |= MTK_ADMA_MODE | (MTK_HW_LRO_MAX_AGG_CNT & 0xff);
+
+ /* the minimal remaining room of SDL0 in RXD for lro aggregation */
+ lro_ctrl_dw3 |= MTK_LRO_MIN_RXD_SDL;
+
+ /* enable HW LRO */
+ lro_ctrl_dw0 |= MTK_LRO_EN;
+
+ mtk_w32(eth, lro_ctrl_dw3, MTK_PDMA_LRO_CTRL_DW3);
+ mtk_w32(eth, lro_ctrl_dw0, MTK_PDMA_LRO_CTRL_DW0);
+
+ return 0;
+}
+
+static void mtk_hwlro_rx_uninit(struct mtk_eth *eth)
+{
+ int i;
+ u32 val;
+
+ /* relinquish lro rings, flush aggregated packets */
+ mtk_w32(eth, MTK_LRO_RING_RELINQUISH_REQ, MTK_PDMA_LRO_CTRL_DW0);
+
+ /* wait for relinquishments done */
+ for (i = 0; i < 10; i++) {
+ val = mtk_r32(eth, MTK_PDMA_LRO_CTRL_DW0);
+ if (val & MTK_LRO_RING_RELINQUISH_DONE) {
+ msleep(20);
+ continue;
+ }
+ }
+
+ /* invalidate lro rings */
+ for (i = 1; i < MTK_MAX_RX_RING_NUM; i++)
+ mtk_w32(eth, 0, MTK_LRO_CTRL_DW2_CFG(i));
+
+ /* disable HW LRO */
+ mtk_w32(eth, 0, MTK_PDMA_LRO_CTRL_DW0);
+}
+
/* wait for DMA to finish whatever it is doing before we start using it again */
static int mtk_dma_busy_wait(struct mtk_eth *eth)
{
@@ -1235,6 +1377,7 @@ static int mtk_dma_busy_wait(struct mtk_eth *eth)
static int mtk_dma_init(struct mtk_eth *eth)
{
int err;
+ u32 i;
if (mtk_dma_busy_wait(eth))
return -EBUSY;
@@ -1250,10 +1393,21 @@ static int mtk_dma_init(struct mtk_eth *eth)
if (err)
return err;
- err = mtk_rx_alloc(eth);
+ err = mtk_rx_alloc(eth, 0, MTK_RX_FLAGS_NORMAL);
if (err)
return err;
+ if (eth->hwlro) {
+ for (i = 1; i < MTK_MAX_RX_RING_NUM; i++) {
+ err = mtk_rx_alloc(eth, i, MTK_RX_FLAGS_HWLRO);
+ if (err)
+ return err;
+ }
+ err = mtk_hwlro_rx_init(eth);
+ if (err)
+ return err;
+ }
+
/* Enable random early drop and set drop threshold automatically */
mtk_w32(eth, FC_THRES_DROP_MODE | FC_THRES_DROP_EN | FC_THRES_MIN,
MTK_QDMA_FC_THRES);
@@ -1278,7 +1432,14 @@ static void mtk_dma_free(struct mtk_eth *eth)
eth->phy_scratch_ring = 0;
}
mtk_tx_clean(eth);
- mtk_rx_clean(eth);
+ mtk_rx_clean(eth, 0);
+
+ if (eth->hwlro) {
+ mtk_hwlro_rx_uninit(eth);
+ for (i = 1; i < MTK_MAX_RX_RING_NUM; i++)
+ mtk_rx_clean(eth, i);
+ }
+
kfree(eth->scratch_head);
}
@@ -1873,6 +2034,9 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
mac->hw = eth;
mac->of_node = np;
+ memset(mac->hwlro_ip, 0, sizeof(mac->hwlro_ip));
+ mac->hwlro_ip_cnt = 0;
+
mac->hw_stats = devm_kzalloc(eth->dev,
sizeof(*mac->hw_stats),
GFP_KERNEL);
@@ -1889,6 +2053,11 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
eth->netdev[id]->watchdog_timeo = 5 * HZ;
eth->netdev[id]->netdev_ops = &mtk_netdev_ops;
eth->netdev[id]->base_addr = (unsigned long)eth->base;
+
+ eth->netdev[id]->hw_features = MTK_HW_FEATURES;
+ if (eth->hwlro)
+ eth->netdev[id]->hw_features |= NETIF_F_LRO;
+
eth->netdev[id]->vlan_features = MTK_HW_FEATURES &
~(NETIF_F_HW_VLAN_CTAG_TX | NETIF_F_HW_VLAN_CTAG_RX);
eth->netdev[id]->features |= MTK_HW_FEATURES;
@@ -1941,6 +2110,8 @@ static int mtk_probe(struct platform_device *pdev)
return PTR_ERR(eth->pctl);
}
+ eth->hwlro = of_property_read_bool(pdev->dev.of_node, "mediatek,hwlro");
+
for (i = 0; i < 3; i++) {
eth->irq[i] = platform_get_irq(pdev, i);
if (eth->irq[i] < 0) {
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 79954b419b53..7c5e534d2120 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -39,7 +39,21 @@
NETIF_F_SG | NETIF_F_TSO | \
NETIF_F_TSO6 | \
NETIF_F_IPV6_CSUM)
-#define NEXT_RX_DESP_IDX(X) (((X) + 1) & (MTK_DMA_SIZE - 1))
+#define NEXT_RX_DESP_IDX(X, Y) (((X) + 1) & ((Y) - 1))
+
+#define MTK_MAX_RX_RING_NUM 4
+#define MTK_HW_LRO_DMA_SIZE 8
+
+#define MTK_MAX_LRO_RX_LENGTH (4096 * 3)
+#define MTK_MAX_LRO_IP_CNT 2
+#define MTK_HW_LRO_TIMER_UNIT 1 /* 20 us */
+#define MTK_HW_LRO_REFRESH_TIME 50000 /* 1 sec. */
+#define MTK_HW_LRO_AGG_TIME 10 /* 200us */
+#define MTK_HW_LRO_AGE_TIME 50 /* 1ms */
+#define MTK_HW_LRO_MAX_AGG_CNT 64
+#define MTK_HW_LRO_BW_THRE 3000
+#define MTK_HW_LRO_REPLACE_DELTA 1000
+#define MTK_HW_LRO_SDL_REMAIN_ROOM 1522
/* Frame Engine Global Reset Register */
#define MTK_RST_GL 0x04
@@ -50,6 +64,9 @@
#define MTK_GDM1_AF BIT(28)
#define MTK_GDM2_AF BIT(29)
+/* PDMA HW LRO Alter Flow Timer Register */
+#define MTK_PDMA_LRO_ALT_REFRESH_TIMER 0x1c
+
/* Frame Engine Interrupt Grouping Register */
#define MTK_FE_INT_GRP 0x20
@@ -70,12 +87,29 @@
/* PDMA RX Base Pointer Register */
#define MTK_PRX_BASE_PTR0 0x900
+#define MTK_PRX_BASE_PTR_CFG(x) (MTK_PRX_BASE_PTR0 + (x * 0x10))
/* PDMA RX Maximum Count Register */
#define MTK_PRX_MAX_CNT0 0x904
+#define MTK_PRX_MAX_CNT_CFG(x) (MTK_PRX_MAX_CNT0 + (x * 0x10))
/* PDMA RX CPU Pointer Register */
#define MTK_PRX_CRX_IDX0 0x908
+#define MTK_PRX_CRX_IDX_CFG(x) (MTK_PRX_CRX_IDX0 + (x * 0x10))
+
+/* PDMA HW LRO Control Registers */
+#define MTK_PDMA_LRO_CTRL_DW0 0x980
+#define MTK_LRO_EN BIT(0)
+#define MTK_L3_CKS_UPD_EN BIT(7)
+#define MTK_LRO_ALT_PKT_CNT_MODE BIT(21)
+#define MTK_LRO_RING_RELINQUISH_REQ (0x3 << 26)
+#define MTK_LRO_RING_RELINQUISH_DONE (0x3 << 29)
+
+#define MTK_PDMA_LRO_CTRL_DW1 0x984
+#define MTK_PDMA_LRO_CTRL_DW2 0x988
+#define MTK_PDMA_LRO_CTRL_DW3 0x98c
+#define MTK_ADMA_MODE BIT(15)
+#define MTK_LRO_MIN_RXD_SDL (MTK_HW_LRO_SDL_REMAIN_ROOM << 16)
/* PDMA Global Configuration Register */
#define MTK_PDMA_GLO_CFG 0xa04
@@ -84,6 +118,7 @@
/* PDMA Reset Index Register */
#define MTK_PDMA_RST_IDX 0xa08
#define MTK_PST_DRX_IDX0 BIT(16)
+#define MTK_PST_DRX_IDX_CFG(x) (MTK_PST_DRX_IDX0 << (x))
/* PDMA Delay Interrupt Register */
#define MTK_PDMA_DELAY_INT 0xa0c
@@ -94,10 +129,33 @@
/* PDMA Interrupt Mask Register */
#define MTK_PDMA_INT_MASK 0xa28
+/* PDMA HW LRO Alter Flow Delta Register */
+#define MTK_PDMA_LRO_ALT_SCORE_DELTA 0xa4c
+
/* PDMA Interrupt grouping registers */
#define MTK_PDMA_INT_GRP1 0xa50
#define MTK_PDMA_INT_GRP2 0xa54
+/* PDMA HW LRO IP Setting Registers */
+#define MTK_LRO_RX_RING0_DIP_DW0 0xb04
+#define MTK_LRO_DIP_DW0_CFG(x) (MTK_LRO_RX_RING0_DIP_DW0 + (x * 0x40))
+#define MTK_RING_MYIP_VLD BIT(9)
+
+/* PDMA HW LRO Ring Control Registers */
+#define MTK_LRO_RX_RING0_CTRL_DW1 0xb28
+#define MTK_LRO_RX_RING0_CTRL_DW2 0xb2c
+#define MTK_LRO_RX_RING0_CTRL_DW3 0xb30
+#define MTK_LRO_CTRL_DW1_CFG(x) (MTK_LRO_RX_RING0_CTRL_DW1 + (x * 0x40))
+#define MTK_LRO_CTRL_DW2_CFG(x) (MTK_LRO_RX_RING0_CTRL_DW2 + (x * 0x40))
+#define MTK_LRO_CTRL_DW3_CFG(x) (MTK_LRO_RX_RING0_CTRL_DW3 + (x * 0x40))
+#define MTK_RING_AGE_TIME_L ((MTK_HW_LRO_AGE_TIME & 0x3ff) << 22)
+#define MTK_RING_AGE_TIME_H ((MTK_HW_LRO_AGE_TIME >> 10) & 0x3f)
+#define MTK_RING_AUTO_LERAN_MODE (3 << 6)
+#define MTK_RING_VLD BIT(8)
+#define MTK_RING_MAX_AGG_TIME ((MTK_HW_LRO_AGG_TIME & 0xffff) << 10)
+#define MTK_RING_MAX_AGG_CNT_L ((MTK_HW_LRO_MAX_AGG_CNT & 0x3f) << 26)
+#define MTK_RING_MAX_AGG_CNT_H ((MTK_HW_LRO_MAX_AGG_CNT >> 6) & 0x3)
+
/* QDMA TX Queue Configuration Registers */
#define MTK_QTX_CFG(x) (0x1800 + (x * 0x10))
#define QDMA_RES_THRES 4
@@ -132,7 +190,6 @@
/* QDMA Reset Index Register */
#define MTK_QDMA_RST_IDX 0x1A08
-#define MTK_PST_DRX_IDX0 BIT(16)
/* QDMA Delay Interrupt Register */
#define MTK_QDMA_DELAY_INT 0x1A0C
@@ -377,6 +434,12 @@ struct mtk_tx_ring {
atomic_t free_count;
};
+/* PDMA rx ring mode */
+enum mtk_rx_flags {
+ MTK_RX_FLAGS_NORMAL = 0,
+ MTK_RX_FLAGS_HWLRO,
+};
+
/* struct mtk_rx_ring - This struct holds info describing a RX ring
* @dma: The descriptor ring
* @data: The memory pointed at by the ring
@@ -391,7 +454,10 @@ struct mtk_rx_ring {
dma_addr_t phys;
u16 frag_size;
u16 buf_size;
+ u16 dma_size;
+ bool calc_idx_update;
u16 calc_idx;
+ u32 crx_idx_reg;
};
/* currently no SoC has more than 2 macs */
@@ -439,9 +505,10 @@ struct mtk_eth {
unsigned long sysclk;
struct regmap *ethsys;
struct regmap *pctl;
+ bool hwlro;
atomic_t dma_refcnt;
struct mtk_tx_ring tx_ring;
- struct mtk_rx_ring rx_ring;
+ struct mtk_rx_ring rx_ring[MTK_MAX_RX_RING_NUM];
struct napi_struct tx_napi;
struct napi_struct rx_napi;
struct mtk_tx_dma *scratch_ring;
@@ -470,6 +537,8 @@ struct mtk_mac {
struct mtk_eth *hw;
struct mtk_hw_stats *hw_stats;
struct phy_device *phy_dev;
+ __be32 hwlro_ip[MTK_MAX_LRO_IP_CNT];
+ int hwlro_ip_cnt;
};
/* the struct describing the SoC. these are declared in the soc_xyz.c files */
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.