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bcm4908: backport recent bcm4908_enet changes
This includes 5.12 fix and 5.13 improvements. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Signed-off-by: maurerr <mariusd84@gmail.com>
This commit is contained in:
Rafał Miłecki
maurerr
parent
1ff94cca9f
commit
b36a250f27
@ -0,0 +1,33 @@
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From a3bc483216650a7232559bf0a1debfbabff3e12c Mon Sep 17 00:00:00 2001
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From: Geert Uytterhoeven <geert+renesas@glider.be>
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Date: Tue, 16 Mar 2021 15:03:41 +0100
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Subject: [PATCH] net: broadcom: BCM4908_ENET should not default to y,
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unconditionally
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Merely enabling compile-testing should not enable additional code.
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To fix this, restrict the automatic enabling of BCM4908_ENET to
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ARCH_BCM4908.
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Fixes: 4feffeadbcb2e5b1 ("net: broadcom: bcm4908enet: add BCM4908 controller driver")
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Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
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Acked-by: Florian Fainelli <f.fainelli@gmail.com>
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Acked-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/broadcom/Kconfig | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/drivers/net/ethernet/broadcom/Kconfig
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+++ b/drivers/net/ethernet/broadcom/Kconfig
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@@ -54,7 +54,7 @@ config B44_PCI
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config BCM4908_ENET
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tristate "Broadcom BCM4908 internal mac support"
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depends on ARCH_BCM4908 || COMPILE_TEST
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- default y
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+ default y if ARCH_BCM4908
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help
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This driver supports Ethernet controller integrated into Broadcom
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BCM4908 family SoCs.
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@ -0,0 +1,48 @@
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From 3559c1ea4336636c886002996d50805365d3055c Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Wed, 10 Mar 2021 09:48:13 +0100
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Subject: [PATCH] net: broadcom: bcm4908_enet: read MAC from OF
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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BCM4908 devices have MAC address accessible using NVMEM so it's needed
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to use OF helper for reading it.
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/broadcom/bcm4908_enet.c | 8 +++++++-
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1 file changed, 7 insertions(+), 1 deletion(-)
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--- a/drivers/net/ethernet/broadcom/bcm4908_enet.c
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+++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c
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@@ -9,6 +9,7 @@
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of.h>
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+#include <linux/of_net.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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@@ -620,6 +621,7 @@ static int bcm4908_enet_probe(struct pla
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struct device *dev = &pdev->dev;
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struct net_device *netdev;
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struct bcm4908_enet *enet;
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+ const u8 *mac;
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int err;
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netdev = devm_alloc_etherdev(dev, sizeof(*enet));
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@@ -647,7 +649,11 @@ static int bcm4908_enet_probe(struct pla
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return err;
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SET_NETDEV_DEV(netdev, &pdev->dev);
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- eth_hw_addr_random(netdev);
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+ mac = of_get_mac_address(dev->of_node);
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+ if (!IS_ERR(mac))
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+ ether_addr_copy(netdev->dev_addr, mac);
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+ else
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+ eth_hw_addr_random(netdev);
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netdev->netdev_ops = &bcm4908_enet_netdev_ops;
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netdev->min_mtu = ETH_ZLEN;
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netdev->mtu = ETH_DATA_LEN;
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@ -0,0 +1,50 @@
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From ab4dda7a8cb7e55ea3d92fd5e249cf6f5396028c Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Thu, 11 Mar 2021 13:35:20 +0100
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Subject: [PATCH] dt-bindings: net: bcm4908-enet: add optional TX interrupt
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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I discovered that hardware actually supports two interrupts, one per DMA
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channel (RX and TX).
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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.../bindings/net/brcm,bcm4908-enet.yaml | 17 +++++++++++++----
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1 file changed, 13 insertions(+), 4 deletions(-)
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--- a/Documentation/devicetree/bindings/net/brcm,bcm4908-enet.yaml
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+++ b/Documentation/devicetree/bindings/net/brcm,bcm4908-enet.yaml
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@@ -22,10 +22,18 @@ properties:
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maxItems: 1
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interrupts:
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- description: RX interrupt
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+ minItems: 1
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+ maxItems: 2
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+ items:
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+ - description: RX interrupt
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+ - description: TX interrupt
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interrupt-names:
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- const: rx
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+ minItems: 1
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+ maxItems: 2
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+ items:
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+ - const: rx
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+ - const: tx
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required:
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- reg
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@@ -43,6 +51,7 @@ examples:
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compatible = "brcm,bcm4908-enet";
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reg = <0x80002000 0x1000>;
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- interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>;
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- interrupt-names = "rx";
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+ interrupts = <GIC_SPI 86 IRQ_TYPE_LEVEL_HIGH>,
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+ <GIC_SPI 87 IRQ_TYPE_LEVEL_HIGH>;
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+ interrupt-names = "rx", "tx";
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};
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@ -0,0 +1,300 @@
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From 12bb508bfe5a564c36864b12253db23cac83bfa1 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
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Date: Thu, 11 Mar 2021 13:35:21 +0100
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Subject: [PATCH] net: broadcom: bcm4908_enet: support TX interrupt
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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It appears that each DMA channel has its own interrupt and both rings
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can be configured (the same way) to handle interrupts.
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1. Make ring interrupts code generic (make it operate on given ring)
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2. Move napi to ring (so each has its own)
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3. Make IRQ handler generic (match ring against received IRQ number)
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4. Add (optional) support for TX interrupt
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Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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drivers/net/ethernet/broadcom/bcm4908_enet.c | 138 ++++++++++++++-----
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1 file changed, 103 insertions(+), 35 deletions(-)
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--- a/drivers/net/ethernet/broadcom/bcm4908_enet.c
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+++ b/drivers/net/ethernet/broadcom/bcm4908_enet.c
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@@ -54,6 +54,7 @@ struct bcm4908_enet_dma_ring {
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int length;
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u16 cfg_block;
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u16 st_ram_block;
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+ struct napi_struct napi;
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union {
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void *cpu_addr;
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@@ -67,8 +68,8 @@ struct bcm4908_enet_dma_ring {
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struct bcm4908_enet {
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struct device *dev;
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struct net_device *netdev;
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- struct napi_struct napi;
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void __iomem *base;
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+ int irq_tx;
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struct bcm4908_enet_dma_ring tx_ring;
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struct bcm4908_enet_dma_ring rx_ring;
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@@ -123,24 +124,31 @@ static void enet_umac_set(struct bcm4908
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* Helpers
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*/
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-static void bcm4908_enet_intrs_on(struct bcm4908_enet *enet)
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+static void bcm4908_enet_set_mtu(struct bcm4908_enet *enet, int mtu)
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{
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- enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_MASK, ENET_DMA_INT_DEFAULTS);
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+ enet_umac_write(enet, UMAC_MAX_FRAME_LEN, mtu + ENET_MAX_ETH_OVERHEAD);
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}
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-static void bcm4908_enet_intrs_off(struct bcm4908_enet *enet)
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+/***
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+ * DMA ring ops
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+ */
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+
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+static void bcm4908_enet_dma_ring_intrs_on(struct bcm4908_enet *enet,
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+ struct bcm4908_enet_dma_ring *ring)
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{
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- enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_MASK, 0);
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+ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG_INT_MASK, ENET_DMA_INT_DEFAULTS);
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}
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-static void bcm4908_enet_intrs_ack(struct bcm4908_enet *enet)
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+static void bcm4908_enet_dma_ring_intrs_off(struct bcm4908_enet *enet,
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+ struct bcm4908_enet_dma_ring *ring)
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{
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- enet_write(enet, ENET_DMA_CH_RX_CFG + ENET_DMA_CH_CFG_INT_STAT, ENET_DMA_INT_DEFAULTS);
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+ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG_INT_MASK, 0);
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}
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-static void bcm4908_enet_set_mtu(struct bcm4908_enet *enet, int mtu)
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+static void bcm4908_enet_dma_ring_intrs_ack(struct bcm4908_enet *enet,
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+ struct bcm4908_enet_dma_ring *ring)
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{
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- enet_umac_write(enet, UMAC_MAX_FRAME_LEN, mtu + ENET_MAX_ETH_OVERHEAD);
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+ enet_write(enet, ring->cfg_block + ENET_DMA_CH_CFG_INT_STAT, ENET_DMA_INT_DEFAULTS);
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}
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/***
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@@ -414,11 +422,14 @@ static void bcm4908_enet_gmac_init(struc
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static irqreturn_t bcm4908_enet_irq_handler(int irq, void *dev_id)
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{
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struct bcm4908_enet *enet = dev_id;
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+ struct bcm4908_enet_dma_ring *ring;
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- bcm4908_enet_intrs_off(enet);
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- bcm4908_enet_intrs_ack(enet);
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+ ring = (irq == enet->irq_tx) ? &enet->tx_ring : &enet->rx_ring;
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- napi_schedule(&enet->napi);
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+ bcm4908_enet_dma_ring_intrs_off(enet, ring);
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+ bcm4908_enet_dma_ring_intrs_ack(enet, ring);
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+
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+ napi_schedule(&ring->napi);
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return IRQ_HANDLED;
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}
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@@ -426,6 +437,8 @@ static irqreturn_t bcm4908_enet_irq_hand
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static int bcm4908_enet_open(struct net_device *netdev)
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{
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struct bcm4908_enet *enet = netdev_priv(netdev);
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+ struct bcm4908_enet_dma_ring *tx_ring = &enet->tx_ring;
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+ struct bcm4908_enet_dma_ring *rx_ring = &enet->rx_ring;
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struct device *dev = enet->dev;
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int err;
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@@ -435,6 +448,17 @@ static int bcm4908_enet_open(struct net_
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return err;
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}
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+ if (enet->irq_tx > 0) {
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+ err = request_irq(enet->irq_tx, bcm4908_enet_irq_handler, 0,
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+ "tx", enet);
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+ if (err) {
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+ dev_err(dev, "Failed to request IRQ %d: %d\n",
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+ enet->irq_tx, err);
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+ free_irq(netdev->irq, enet);
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+ return err;
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+ }
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+ }
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+
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bcm4908_enet_gmac_init(enet);
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bcm4908_enet_dma_reset(enet);
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bcm4908_enet_dma_init(enet);
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@@ -443,14 +467,19 @@ static int bcm4908_enet_open(struct net_
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enet_set(enet, ENET_DMA_CONTROLLER_CFG, ENET_DMA_CTRL_CFG_MASTER_EN);
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enet_maskset(enet, ENET_DMA_CONTROLLER_CFG, ENET_DMA_CTRL_CFG_FLOWC_CH1_EN, 0);
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- bcm4908_enet_dma_rx_ring_enable(enet, &enet->rx_ring);
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- napi_enable(&enet->napi);
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+ if (enet->irq_tx > 0) {
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+ napi_enable(&tx_ring->napi);
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+ bcm4908_enet_dma_ring_intrs_ack(enet, tx_ring);
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+ bcm4908_enet_dma_ring_intrs_on(enet, tx_ring);
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+ }
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+
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+ bcm4908_enet_dma_rx_ring_enable(enet, rx_ring);
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+ napi_enable(&rx_ring->napi);
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netif_carrier_on(netdev);
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netif_start_queue(netdev);
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-
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- bcm4908_enet_intrs_ack(enet);
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- bcm4908_enet_intrs_on(enet);
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+ bcm4908_enet_dma_ring_intrs_ack(enet, rx_ring);
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+ bcm4908_enet_dma_ring_intrs_on(enet, rx_ring);
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return 0;
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}
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@@ -458,16 +487,20 @@ static int bcm4908_enet_open(struct net_
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static int bcm4908_enet_stop(struct net_device *netdev)
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{
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struct bcm4908_enet *enet = netdev_priv(netdev);
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+ struct bcm4908_enet_dma_ring *tx_ring = &enet->tx_ring;
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+ struct bcm4908_enet_dma_ring *rx_ring = &enet->rx_ring;
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netif_stop_queue(netdev);
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netif_carrier_off(netdev);
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- napi_disable(&enet->napi);
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+ napi_disable(&rx_ring->napi);
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+ napi_disable(&tx_ring->napi);
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bcm4908_enet_dma_rx_ring_disable(enet, &enet->rx_ring);
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bcm4908_enet_dma_tx_ring_disable(enet, &enet->tx_ring);
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bcm4908_enet_dma_uninit(enet);
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+ free_irq(enet->irq_tx, enet);
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free_irq(enet->netdev->irq, enet);
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return 0;
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@@ -484,25 +517,19 @@ static int bcm4908_enet_start_xmit(struc
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u32 tmp;
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/* Free transmitted skbs */
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- while (ring->read_idx != ring->write_idx) {
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- buf_desc = &ring->buf_desc[ring->read_idx];
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- if (le32_to_cpu(buf_desc->ctl) & DMA_CTL_STATUS_OWN)
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- break;
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- slot = &ring->slots[ring->read_idx];
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-
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- dma_unmap_single(dev, slot->dma_addr, slot->len, DMA_TO_DEVICE);
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- dev_kfree_skb(slot->skb);
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- if (++ring->read_idx == ring->length)
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- ring->read_idx = 0;
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- }
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+ if (enet->irq_tx < 0 &&
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+ !(le32_to_cpu(ring->buf_desc[ring->read_idx].ctl) & DMA_CTL_STATUS_OWN))
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+ napi_schedule(&enet->tx_ring.napi);
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/* Don't use the last empty buf descriptor */
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if (ring->read_idx <= ring->write_idx)
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free_buf_descs = ring->read_idx - ring->write_idx + ring->length;
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else
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free_buf_descs = ring->read_idx - ring->write_idx;
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- if (free_buf_descs < 2)
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+ if (free_buf_descs < 2) {
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+ netif_stop_queue(netdev);
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return NETDEV_TX_BUSY;
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+ }
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/* Hardware removes OWN bit after sending data */
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buf_desc = &ring->buf_desc[ring->write_idx];
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@@ -539,9 +566,10 @@ static int bcm4908_enet_start_xmit(struc
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return NETDEV_TX_OK;
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}
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-static int bcm4908_enet_poll(struct napi_struct *napi, int weight)
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+static int bcm4908_enet_poll_rx(struct napi_struct *napi, int weight)
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{
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- struct bcm4908_enet *enet = container_of(napi, struct bcm4908_enet, napi);
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+ struct bcm4908_enet_dma_ring *rx_ring = container_of(napi, struct bcm4908_enet_dma_ring, napi);
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+ struct bcm4908_enet *enet = container_of(rx_ring, struct bcm4908_enet, rx_ring);
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struct device *dev = enet->dev;
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int handled = 0;
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@@ -590,7 +618,7 @@ static int bcm4908_enet_poll(struct napi
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if (handled < weight) {
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napi_complete_done(napi, handled);
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- bcm4908_enet_intrs_on(enet);
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+ bcm4908_enet_dma_ring_intrs_on(enet, rx_ring);
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}
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/* Hardware could disable ring if it run out of descriptors */
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@@ -599,6 +627,42 @@ static int bcm4908_enet_poll(struct napi
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return handled;
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}
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+static int bcm4908_enet_poll_tx(struct napi_struct *napi, int weight)
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+{
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+ struct bcm4908_enet_dma_ring *tx_ring = container_of(napi, struct bcm4908_enet_dma_ring, napi);
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+ struct bcm4908_enet *enet = container_of(tx_ring, struct bcm4908_enet, tx_ring);
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+ struct bcm4908_enet_dma_ring_bd *buf_desc;
|
||||
+ struct bcm4908_enet_dma_ring_slot *slot;
|
||||
+ struct device *dev = enet->dev;
|
||||
+ unsigned int bytes = 0;
|
||||
+ int handled = 0;
|
||||
+
|
||||
+ while (handled < weight && tx_ring->read_idx != tx_ring->write_idx) {
|
||||
+ buf_desc = &tx_ring->buf_desc[tx_ring->read_idx];
|
||||
+ if (le32_to_cpu(buf_desc->ctl) & DMA_CTL_STATUS_OWN)
|
||||
+ break;
|
||||
+ slot = &tx_ring->slots[tx_ring->read_idx];
|
||||
+
|
||||
+ dma_unmap_single(dev, slot->dma_addr, slot->len, DMA_TO_DEVICE);
|
||||
+ dev_kfree_skb(slot->skb);
|
||||
+ bytes += slot->len;
|
||||
+ if (++tx_ring->read_idx == tx_ring->length)
|
||||
+ tx_ring->read_idx = 0;
|
||||
+
|
||||
+ handled++;
|
||||
+ }
|
||||
+
|
||||
+ if (handled < weight) {
|
||||
+ napi_complete_done(napi, handled);
|
||||
+ bcm4908_enet_dma_ring_intrs_on(enet, tx_ring);
|
||||
+ }
|
||||
+
|
||||
+ if (netif_queue_stopped(enet->netdev))
|
||||
+ netif_wake_queue(enet->netdev);
|
||||
+
|
||||
+ return handled;
|
||||
+}
|
||||
+
|
||||
static int bcm4908_enet_change_mtu(struct net_device *netdev, int new_mtu)
|
||||
{
|
||||
struct bcm4908_enet *enet = netdev_priv(netdev);
|
||||
@@ -642,6 +706,8 @@ static int bcm4908_enet_probe(struct pla
|
||||
if (netdev->irq < 0)
|
||||
return netdev->irq;
|
||||
|
||||
+ enet->irq_tx = platform_get_irq_byname(pdev, "tx");
|
||||
+
|
||||
dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
|
||||
|
||||
err = bcm4908_enet_dma_alloc(enet);
|
||||
@@ -658,7 +724,8 @@ static int bcm4908_enet_probe(struct pla
|
||||
netdev->min_mtu = ETH_ZLEN;
|
||||
netdev->mtu = ETH_DATA_LEN;
|
||||
netdev->max_mtu = ENET_MTU_MAX;
|
||||
- netif_napi_add(netdev, &enet->napi, bcm4908_enet_poll, 64);
|
||||
+ netif_tx_napi_add(netdev, &enet->tx_ring.napi, bcm4908_enet_poll_tx, NAPI_POLL_WEIGHT);
|
||||
+ netif_napi_add(netdev, &enet->rx_ring.napi, bcm4908_enet_poll_rx, NAPI_POLL_WEIGHT);
|
||||
|
||||
err = register_netdev(netdev);
|
||||
if (err) {
|
||||
@@ -676,7 +743,8 @@ static int bcm4908_enet_remove(struct pl
|
||||
struct bcm4908_enet *enet = platform_get_drvdata(pdev);
|
||||
|
||||
unregister_netdev(enet->netdev);
|
||||
- netif_napi_del(&enet->napi);
|
||||
+ netif_napi_del(&enet->rx_ring.napi);
|
||||
+ netif_napi_del(&enet->tx_ring.napi);
|
||||
bcm4908_enet_dma_free(enet);
|
||||
|
||||
return 0;
|
||||
Loading…
x
Reference in New Issue
Block a user