[PATCH 07/31] net: mediatek: stop using bitfileds for DMA descriptors
Weijie Gao
weijie.gao at mediatek.com
Thu Aug 4 05:35:25 CEST 2022
This patch is a preparation for adding a new version of PDMA of which the
DMA descriptor fields has changed. Using bitfields will result in a complex
modification. Convert bitfields to u32 units can solve this problem easily.
Signed-off-by: Weijie Gao <weijie.gao at mediatek.com>
---
drivers/net/mtk_eth.c | 144 ++++++++++++++----------------------------
drivers/net/mtk_eth.h | 32 ++++++++++
2 files changed, 80 insertions(+), 96 deletions(-)
diff --git a/drivers/net/mtk_eth.c b/drivers/net/mtk_eth.c
index 92d2ea4f2a..bfa049cf79 100644
--- a/drivers/net/mtk_eth.c
+++ b/drivers/net/mtk_eth.c
@@ -65,77 +65,6 @@
(DP_DISCARD << MC_DP_S) | \
(DP_DISCARD << UN_DP_S))
-struct pdma_rxd_info1 {
- u32 PDP0;
-};
-
-struct pdma_rxd_info2 {
- u32 PLEN1 : 14;
- u32 LS1 : 1;
- u32 UN_USED : 1;
- u32 PLEN0 : 14;
- u32 LS0 : 1;
- u32 DDONE : 1;
-};
-
-struct pdma_rxd_info3 {
- u32 PDP1;
-};
-
-struct pdma_rxd_info4 {
- u32 FOE_ENTRY : 14;
- u32 CRSN : 5;
- u32 SP : 3;
- u32 L4F : 1;
- u32 L4VLD : 1;
- u32 TACK : 1;
- u32 IP4F : 1;
- u32 IP4 : 1;
- u32 IP6 : 1;
- u32 UN_USED : 4;
-};
-
-struct pdma_rxdesc {
- struct pdma_rxd_info1 rxd_info1;
- struct pdma_rxd_info2 rxd_info2;
- struct pdma_rxd_info3 rxd_info3;
- struct pdma_rxd_info4 rxd_info4;
-};
-
-struct pdma_txd_info1 {
- u32 SDP0;
-};
-
-struct pdma_txd_info2 {
- u32 SDL1 : 14;
- u32 LS1 : 1;
- u32 BURST : 1;
- u32 SDL0 : 14;
- u32 LS0 : 1;
- u32 DDONE : 1;
-};
-
-struct pdma_txd_info3 {
- u32 SDP1;
-};
-
-struct pdma_txd_info4 {
- u32 VLAN_TAG : 16;
- u32 INS : 1;
- u32 RESV : 2;
- u32 UDF : 6;
- u32 FPORT : 3;
- u32 TSO : 1;
- u32 TUI_CO : 3;
-};
-
-struct pdma_txdesc {
- struct pdma_txd_info1 txd_info1;
- struct pdma_txd_info2 txd_info2;
- struct pdma_txd_info3 txd_info3;
- struct pdma_txd_info4 txd_info4;
-};
-
enum mtk_switch {
SW_NONE,
SW_MT7530,
@@ -145,13 +74,15 @@ enum mtk_switch {
struct mtk_soc_data {
u32 caps;
u32 ana_rgc3;
+ u32 txd_size;
+ u32 rxd_size;
};
struct mtk_eth_priv {
char pkt_pool[TOTAL_PKT_BUF_SIZE] __aligned(ARCH_DMA_MINALIGN);
- struct pdma_txdesc *tx_ring_noc;
- struct pdma_rxdesc *rx_ring_noc;
+ void *tx_ring_noc;
+ void *rx_ring_noc;
int rx_dma_owner_idx0;
int tx_cpu_owner_idx0;
@@ -1196,14 +1127,16 @@ static void mtk_mac_init(struct mtk_eth_priv *priv)
static void mtk_eth_fifo_init(struct mtk_eth_priv *priv)
{
char *pkt_base = priv->pkt_pool;
+ struct mtk_tx_dma *txd;
+ struct mtk_rx_dma *rxd;
int i;
mtk_pdma_rmw(priv, PDMA_GLO_CFG_REG, 0xffff0000, 0);
udelay(500);
- memset(priv->tx_ring_noc, 0, NUM_TX_DESC * sizeof(struct pdma_txdesc));
- memset(priv->rx_ring_noc, 0, NUM_RX_DESC * sizeof(struct pdma_rxdesc));
- memset(priv->pkt_pool, 0, TOTAL_PKT_BUF_SIZE);
+ memset(priv->tx_ring_noc, 0, NUM_TX_DESC * priv->soc->txd_size);
+ memset(priv->rx_ring_noc, 0, NUM_RX_DESC * priv->soc->rxd_size);
+ memset(priv->pkt_pool, 0xff, TOTAL_PKT_BUF_SIZE);
flush_dcache_range((ulong)pkt_base,
(ulong)(pkt_base + TOTAL_PKT_BUF_SIZE));
@@ -1212,17 +1145,21 @@ static void mtk_eth_fifo_init(struct mtk_eth_priv
*priv)
priv->tx_cpu_owner_idx0 = 0;
for (i = 0; i < NUM_TX_DESC; i++) {
- priv->tx_ring_noc[i].txd_info2.LS0 = 1;
- priv->tx_ring_noc[i].txd_info2.DDONE = 1;
- priv->tx_ring_noc[i].txd_info4.FPORT = priv->gmac_id + 1;
+ txd = priv->tx_ring_noc + i * priv->soc->txd_size;
+
+ txd->txd1 = virt_to_phys(pkt_base);
+ txd->txd2 = PDMA_TXD2_DDONE | PDMA_TXD2_LS0;
+ txd->txd4 = PDMA_TXD4_FPORT_SET(priv->gmac_id + 1);
- priv->tx_ring_noc[i].txd_info1.SDP0 = virt_to_phys(pkt_base);
pkt_base += PKTSIZE_ALIGN;
}
for (i = 0; i < NUM_RX_DESC; i++) {
- priv->rx_ring_noc[i].rxd_info2.PLEN0 = PKTSIZE_ALIGN;
- priv->rx_ring_noc[i].rxd_info1.PDP0 = virt_to_phys(pkt_base);
+ rxd = priv->rx_ring_noc + i * priv->soc->rxd_size;
+
+ rxd->rxd1 = virt_to_phys(pkt_base);
+ rxd->rxd2 = PDMA_RXD2_PLEN0_SET(PKTSIZE_ALIGN);
+
pkt_base += PKTSIZE_ALIGN;
}
@@ -1309,20 +1246,22 @@ static int mtk_eth_send(struct udevice *dev, void
*packet, int length)
{
struct mtk_eth_priv *priv = dev_get_priv(dev);
u32 idx = priv->tx_cpu_owner_idx0;
+ struct mtk_tx_dma *txd;
void *pkt_base;
- if (!priv->tx_ring_noc[idx].txd_info2.DDONE) {
+ txd = priv->tx_ring_noc + idx * priv->soc->txd_size;
+
+ if (!(txd->txd2 & PDMA_TXD2_DDONE)) {
debug("mtk-eth: TX DMA descriptor ring is full\n");
return -EPERM;
}
- pkt_base = (void *)phys_to_virt(priv->tx_ring_noc[idx].txd_info1.SDP0);
+ pkt_base = (void *)phys_to_virt(txd->txd1);
memcpy(pkt_base, packet, length);
flush_dcache_range((ulong)pkt_base, (ulong)pkt_base +
roundup(length, ARCH_DMA_MINALIGN));
- priv->tx_ring_noc[idx].txd_info2.SDL0 = length;
- priv->tx_ring_noc[idx].txd_info2.DDONE = 0;
+ txd->txd2 = PDMA_TXD2_LS0 | PDMA_TXD2_SDL0_SET(length);
priv->tx_cpu_owner_idx0 = (priv->tx_cpu_owner_idx0 + 1) % NUM_TX_DESC;
mtk_pdma_write(priv, TX_CTX_IDX_REG(0), priv->tx_cpu_owner_idx0);
@@ -1334,16 +1273,20 @@ static int mtk_eth_recv(struct udevice *dev, int
flags, uchar **packetp)
{
struct mtk_eth_priv *priv = dev_get_priv(dev);
u32 idx = priv->rx_dma_owner_idx0;
+ struct mtk_rx_dma *rxd;
uchar *pkt_base;
u32 length;
- if (!priv->rx_ring_noc[idx].rxd_info2.DDONE) {
+ rxd = priv->rx_ring_noc + idx * priv->soc->rxd_size;
+
+ if (!(rxd->rxd2 & PDMA_RXD2_DDONE)) {
debug("mtk-eth: RX DMA descriptor ring is empty\n");
return -EAGAIN;
}
- length = priv->rx_ring_noc[idx].rxd_info2.PLEN0;
- pkt_base = (void *)phys_to_virt(priv->rx_ring_noc[idx].rxd_info1.PDP0);
+ length = PDMA_RXD2_PLEN0_GET(rxd->rxd2);
+
+ pkt_base = (void *)phys_to_virt(rxd->rxd1);
invalidate_dcache_range((ulong)pkt_base, (ulong)pkt_base +
roundup(length, ARCH_DMA_MINALIGN));
@@ -1357,10 +1300,11 @@ static int mtk_eth_free_pkt(struct udevice *dev,
uchar *packet, int length)
{
struct mtk_eth_priv *priv = dev_get_priv(dev);
u32 idx = priv->rx_dma_owner_idx0;
+ struct mtk_rx_dma *rxd;
+
+ rxd = priv->rx_ring_noc + idx * priv->soc->rxd_size;
- priv->rx_ring_noc[idx].rxd_info2.DDONE = 0;
- priv->rx_ring_noc[idx].rxd_info2.LS0 = 0;
- priv->rx_ring_noc[idx].rxd_info2.PLEN0 = PKTSIZE_ALIGN;
+ rxd->rxd2 = PDMA_RXD2_PLEN0_SET(PKTSIZE_ALIGN);
mtk_pdma_write(priv, RX_CRX_IDX_REG(0), idx);
priv->rx_dma_owner_idx0 = (priv->rx_dma_owner_idx0 + 1) % NUM_RX_DESC;
@@ -1387,11 +1331,11 @@ static int mtk_eth_probe(struct udevice *dev)
return ret;
/* Prepare for tx/rx rings */
- priv->tx_ring_noc = (struct pdma_txdesc *)
- noncached_alloc(sizeof(struct pdma_txdesc) * NUM_TX_DESC,
+ priv->tx_ring_noc = (void *)
+ noncached_alloc(priv->soc->txd_size * NUM_TX_DESC,
ARCH_DMA_MINALIGN);
- priv->rx_ring_noc = (struct pdma_rxdesc *)
- noncached_alloc(sizeof(struct pdma_rxdesc) * NUM_RX_DESC,
+ priv->rx_ring_noc = (void *)
+ noncached_alloc(priv->soc->rxd_size * NUM_RX_DESC,
ARCH_DMA_MINALIGN);
/* Set MAC mode */
@@ -1548,18 +1492,26 @@ static int mtk_eth_of_to_plat(struct udevice *dev)
static const struct mtk_soc_data mt7629_data = {
.ana_rgc3 = 0x128,
+ .txd_size = sizeof(struct mtk_tx_dma),
+ .rxd_size = sizeof(struct mtk_rx_dma),
};
static const struct mtk_soc_data mt7623_data = {
.caps = MT7623_CAPS,
+ .txd_size = sizeof(struct mtk_tx_dma),
+ .rxd_size = sizeof(struct mtk_rx_dma),
};
static const struct mtk_soc_data mt7622_data = {
.ana_rgc3 = 0x2028,
+ .txd_size = sizeof(struct mtk_tx_dma),
+ .rxd_size = sizeof(struct mtk_rx_dma),
};
static const struct mtk_soc_data mt7621_data = {
.caps = MT7621_CAPS,
+ .txd_size = sizeof(struct mtk_tx_dma),
+ .rxd_size = sizeof(struct mtk_rx_dma),
};
static const struct udevice_id mtk_eth_ids[] = {
diff --git a/drivers/net/mtk_eth.h b/drivers/net/mtk_eth.h
index 15c2030617..65bc9fcc04 100644
--- a/drivers/net/mtk_eth.h
+++ b/drivers/net/mtk_eth.h
@@ -10,6 +10,7 @@
#define _MTK_ETH_H_
#include <linux/bitops.h>
+#include <linux/bitfield.h>
enum mkt_eth_capabilities {
MTK_TRGMII_BIT,
@@ -435,4 +436,35 @@ enum mkt_eth_capabilities {
#define PHY_POWER_SAVING_M 0x300
#define PHY_POWER_SAVING_TX 0x0
+/* PDMA descriptors */
+struct mtk_rx_dma {
+ unsigned int rxd1;
+ unsigned int rxd2;
+ unsigned int rxd3;
+ unsigned int rxd4;
+} __packed __aligned(4);
+
+struct mtk_tx_dma {
+ unsigned int txd1;
+ unsigned int txd2;
+ unsigned int txd3;
+ unsigned int txd4;
+} __packed __aligned(4);
+
+/* PDMA TXD fields */
+#define PDMA_TXD2_DDONE BIT(31)
+#define PDMA_TXD2_LS0 BIT(30)
+#define PDMA_TXD2_SDL0_M GENMASK(29, 16)
+#define PDMA_TXD2_SDL0_SET(_v) FIELD_PREP(PDMA_TXD2_SDL0_M, (_v))
+
+#define PDMA_TXD4_FPORT_M GENMASK(27, 25)
+#define PDMA_TXD4_FPORT_SET(_v) FIELD_PREP(PDMA_TXD4_FPORT_M, (_v))
+
+/* PDMA RXD fields */
+#define PDMA_RXD2_DDONE BIT(31)
+#define PDMA_RXD2_LS0 BIT(30)
+#define PDMA_RXD2_PLEN0_M GENMASK(29, 16)
+#define PDMA_RXD2_PLEN0_GET(_v) FIELD_GET(PDMA_RXD2_PLEN0_M, (_v))
+#define PDMA_RXD2_PLEN0_SET(_v) FIELD_PREP(PDMA_RXD2_PLEN0_M, (_v))
+
#endif /* _MTK_ETH_H_ */
--
2.17.1
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