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Message-Id: <0983a4554047407ea6a6fc7948caa544d5dd4dd1.1489169213.git.jpinto@synopsys.com>
Date: Fri, 10 Mar 2017 18:24:55 +0000
From: Joao Pinto <Joao.Pinto@...opsys.com>
To: davem@...emloft.net
Cc: peppe.cavallaro@...com, alexandre.torgue@...com,
niklas.cassel@...s.com, netdev@...r.kernel.org,
Joao Pinto <Joao.Pinto@...opsys.com>
Subject: [PATCH v5 net-next 5/9] net: stmmac: mapping mtl rx to dma channel
This patch adds the functionality of RX queue to dma channel mapping
based on configuration.
Signed-off-by: Joao Pinto <jpinto@...opsys.com>
---
Changes v4->v5:
- patch title update (stmicro replaced by stmmac)
Changes v3->v4:
- variable init was simplified in some functions
Changes v1->v3:
- Just to keep up with patch-set version
drivers/net/ethernet/stmicro/stmmac/common.h | 2 ++
drivers/net/ethernet/stmicro/stmmac/dwmac4.h | 7 +++++++
drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c | 25 +++++++++++++++++++++++
drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 21 +++++++++++++++++++
4 files changed, 55 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/common.h b/drivers/net/ethernet/stmicro/stmmac/common.h
index ad89c47..32f5f25 100644
--- a/drivers/net/ethernet/stmicro/stmmac/common.h
+++ b/drivers/net/ethernet/stmicro/stmmac/common.h
@@ -462,6 +462,8 @@ struct stmmac_ops {
/* Set MTL TX queues weight */
void (*set_mtl_tx_queue_weight)(struct mac_device_info *hw,
u32 weight, u32 queue);
+ /* RX MTL queue to RX dma mapping */
+ void (*map_mtl_to_dma)(struct mac_device_info *hw, u32 queue, u32 chan);
/* Dump MAC registers */
void (*dump_regs)(struct mac_device_info *hw, u32 *reg_space);
/* Handle extra events on specific interrupts hw dependent */
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
index 7d77e78..9dd8ac1 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4.h
@@ -174,6 +174,13 @@ enum power_event {
#define MTL_INT_STATUS 0x00000c20
#define MTL_INT_Q0 BIT(0)
+#define MTL_RXQ_DMA_MAP0 0x00000c30 /* queue 0 to 3 */
+#define MTL_RXQ_DMA_MAP1 0x00000c34 /* queue 4 to 7 */
+#define MTL_RXQ_DMA_Q04MDMACH_MASK GENMASK(3, 0)
+#define MTL_RXQ_DMA_Q04MDMACH(x) ((x) << 0)
+#define MTL_RXQ_DMA_QXMDMACH_MASK(x) GENMASK(11 + (8 * ((x) - 1)), 8 * (x))
+#define MTL_RXQ_DMA_QXMDMACH(chan, q) ((chan) << (8 * (q)))
+
#define MTL_CHAN_BASE_ADDR 0x00000d00
#define MTL_CHAN_BASE_OFFSET 0x40
#define MTL_CHANX_BASE_ADDR(x) (MTL_CHAN_BASE_ADDR + \
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
index 21a696e..e9b153f 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c
@@ -131,6 +131,30 @@ static void dwmac4_set_mtl_tx_queue_weight(struct mac_device_info *hw,
writel(value, ioaddr + MTL_TXQX_WEIGHT_BASE_ADDR(queue));
}
+static void dwmac4_map_mtl_dma(struct mac_device_info *hw, u32 queue, u32 chan)
+{
+ void __iomem *ioaddr = hw->pcsr;
+ u32 value;
+
+ if (queue < 4)
+ value = readl(ioaddr + MTL_RXQ_DMA_MAP0);
+ else
+ value = readl(ioaddr + MTL_RXQ_DMA_MAP1);
+
+ if (queue == 0 || queue == 4) {
+ value &= ~MTL_RXQ_DMA_Q04MDMACH_MASK;
+ value |= MTL_RXQ_DMA_Q04MDMACH(chan);
+ } else {
+ value &= ~MTL_RXQ_DMA_QXMDMACH_MASK(queue);
+ value |= MTL_RXQ_DMA_QXMDMACH(chan, queue);
+ }
+
+ if (queue < 4)
+ writel(value, ioaddr + MTL_RXQ_DMA_MAP0);
+ else
+ writel(value, ioaddr + MTL_RXQ_DMA_MAP1);
+}
+
static void dwmac4_dump_regs(struct mac_device_info *hw, u32 *reg_space)
{
void __iomem *ioaddr = hw->pcsr;
@@ -521,6 +545,7 @@ static const struct stmmac_ops dwmac4_ops = {
.prog_mtl_rx_algorithms = dwmac4_prog_mtl_rx_algorithms,
.prog_mtl_tx_algorithms = dwmac4_prog_mtl_tx_algorithms,
.set_mtl_tx_queue_weight = dwmac4_set_mtl_tx_queue_weight,
+ .map_mtl_to_dma = dwmac4_map_mtl_dma,
.dump_regs = dwmac4_dump_regs,
.host_irq_status = dwmac4_irq_status,
.flow_ctrl = dwmac4_flow_ctrl,
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index c3e2dbf..619bcc6 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1657,6 +1657,23 @@ static void stmmac_set_tx_queue_weight(struct stmmac_priv *priv)
}
/**
+ * stmmac_rx_queue_dma_chan_map - Map RX queue to RX dma channel
+ * @priv: driver private structure
+ * Description: It is used for mapping RX queues to RX dma channels
+ */
+static void stmmac_rx_queue_dma_chan_map(struct stmmac_priv *priv)
+{
+ u32 rx_queues_count = priv->plat->rx_queues_to_use;
+ u32 queue;
+ u32 chan;
+
+ for (queue = 0; queue < rx_queues_count; queue++) {
+ chan = priv->plat->rx_queues_cfg[queue].chan;
+ priv->hw->mac->map_mtl_to_dma(priv->hw, queue, chan);
+ }
+}
+
+/**
* stmmac_mtl_configuration - Configure MTL
* @priv: driver private structure
* Description: It is used for configurring MTL
@@ -1679,6 +1696,10 @@ static void stmmac_mtl_configuration(struct stmmac_priv *priv)
priv->hw->mac->prog_mtl_tx_algorithms(priv->hw,
priv->plat->tx_sched_algorithm);
+ /* Map RX MTL to DMA channels */
+ if (rx_queues_count > 1 && priv->hw->mac->map_mtl_to_dma)
+ stmmac_rx_queue_dma_chan_map(priv);
+
/* Enable MAC RX Queues */
if (rx_queues_count > 1 && priv->hw->mac->rx_queue_enable)
stmmac_mac_enable_rx_queues(priv);
--
2.9.3
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