From 0a24488d93e8039d046518990291aae827c0eab9 Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Mon, 21 Oct 2024 17:22:41 -0700 Subject: [PATCH 1/5] net: ibm: emac: use netif_receive_skb_list Small rx improvement. Would use napi_gro_receive instead but that's a lot more involved than netif_receive_skb_list because of how the function is implemented. Before: > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 51556 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.04 sec 559 MBytes 467 Mbits/sec > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 48228 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.03 sec 558 MBytes 467 Mbits/sec > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 47600 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.04 sec 557 MBytes 466 Mbits/sec > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 37252 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.05 sec 559 MBytes 467 Mbits/sec After: > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 40786 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.05 sec 572 MBytes 478 Mbits/sec > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 52482 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.04 sec 571 MBytes 477 Mbits/sec > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 48370 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.04 sec 572 MBytes 478 Mbits/sec > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 46086 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.05 sec 571 MBytes 476 Mbits/sec > iperf -c 192.168.1.1 ------------------------------------------------------------ Client connecting to 192.168.1.1, TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 1] local 192.168.1.101 port 46062 connected with 192.168.1.1 port 5001 [ ID] Interval Transfer Bandwidth [ 1] 0.00-10.04 sec 572 MBytes 478 Mbits/sec Signed-off-by: Rosen Penev Reviewed-by: Simon Horman Reviewed-by: Shannon Nelson Signed-off-by: Paolo Abeni --- drivers/net/ethernet/ibm/emac/core.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c index dadd987efb6b..0edcb435e62f 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -1727,6 +1727,7 @@ static inline int emac_rx_sg_append(struct emac_instance *dev, int slot) /* NAPI poll context */ static int emac_poll_rx(void *param, int budget) { + LIST_HEAD(rx_list); struct emac_instance *dev = param; int slot = dev->rx_slot, received = 0; @@ -1783,8 +1784,7 @@ static int emac_poll_rx(void *param, int budget) skb->protocol = eth_type_trans(skb, dev->ndev); emac_rx_csum(dev, skb, ctrl); - if (unlikely(netif_receive_skb(skb) == NET_RX_DROP)) - ++dev->estats.rx_dropped_stack; + list_add_tail(&skb->list, &rx_list); next: ++dev->stats.rx_packets; skip: @@ -1828,6 +1828,8 @@ static int emac_poll_rx(void *param, int budget) goto next; } + netif_receive_skb_list(&rx_list); + if (received) { DBG2(dev, "rx %d BDs" NL, received); dev->rx_slot = slot; From c9bf90863df5fc8bae9513ce9bfcc260fad2ea0e Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Mon, 21 Oct 2024 17:22:42 -0700 Subject: [PATCH 2/5] net: ibm: emac: use devm_platform_ioremap_resource No need to have a struct resource. Gets rid of the TODO. Signed-off-by: Rosen Penev Reviewed-by: Simon Horman Reviewed-by: Shannon Nelson Signed-off-by: Paolo Abeni --- drivers/net/ethernet/ibm/emac/core.c | 8 +++----- 1 file changed, 3 insertions(+), 5 deletions(-) diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c index 0edcb435e62f..f387c4635cc6 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -3050,12 +3050,10 @@ static int emac_probe(struct platform_device *ofdev) ndev->irq = dev->emac_irq; - /* Map EMAC regs */ - // TODO : platform_get_resource() and devm_ioremap_resource() - dev->emacp = devm_of_iomap(&ofdev->dev, np, 0, NULL); - if (!dev->emacp) { + dev->emacp = devm_platform_ioremap_resource(ofdev, 0); + if (IS_ERR(dev->emacp)) { dev_err(&ofdev->dev, "can't map device registers"); - err = -ENOMEM; + err = PTR_ERR(dev->emacp); goto err_gone; } From a598f66d9169312e7eaab8cc7b8f175866e68997 Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Mon, 21 Oct 2024 17:22:43 -0700 Subject: [PATCH 3/5] net: ibm: emac: use platform_get_irq No need for irq_of_parse_and_map since we have platform_device. Signed-off-by: Rosen Penev Reviewed-by: Simon Horman Reviewed-by: Shannon Nelson Signed-off-by: Paolo Abeni --- drivers/net/ethernet/ibm/emac/core.c | 9 +-------- 1 file changed, 1 insertion(+), 8 deletions(-) diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c index f387c4635cc6..8c6f69f90af9 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -3031,15 +3031,8 @@ static int emac_probe(struct platform_device *ofdev) if (err) goto err_gone; - /* Get interrupts. EMAC irq is mandatory */ - dev->emac_irq = irq_of_parse_and_map(np, 0); - if (!dev->emac_irq) { - printk(KERN_ERR "%pOF: Can't map main interrupt\n", np); - err = -ENODEV; - goto err_gone; - } - /* Setup error IRQ handler */ + dev->emac_irq = platform_get_irq(ofdev, 0); err = devm_request_irq(&ofdev->dev, dev->emac_irq, emac_irq, 0, "EMAC", dev); if (err) { From af4698be49e856589f559fee2054de5bc7d5b72f Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Mon, 21 Oct 2024 17:22:44 -0700 Subject: [PATCH 4/5] net: ibm: emac: use devm for mutex_init It seems since inception that mutex_destroy was never called for these in _remove. Instead of handling this manually, just use devm for simplicity. Signed-off-by: Rosen Penev Reviewed-by: Shannon Nelson Signed-off-by: Paolo Abeni --- drivers/net/ethernet/ibm/emac/core.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c index 8c6f69f90af9..1f45f2a78829 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -3021,8 +3021,14 @@ static int emac_probe(struct platform_device *ofdev) SET_NETDEV_DEV(ndev, &ofdev->dev); /* Initialize some embedded data structures */ - mutex_init(&dev->mdio_lock); - mutex_init(&dev->link_lock); + err = devm_mutex_init(&ofdev->dev, &dev->mdio_lock); + if (err) + goto err_gone; + + err = devm_mutex_init(&ofdev->dev, &dev->link_lock); + if (err) + goto err_gone; + spin_lock_init(&dev->lock); INIT_WORK(&dev->reset_work, emac_reset_work); From 707f1c4b6a2cf0bd290a63b6f3701878bb15e05f Mon Sep 17 00:00:00 2001 From: Rosen Penev Date: Mon, 21 Oct 2024 17:22:45 -0700 Subject: [PATCH 5/5] net: ibm: emac: generate random MAC if not found On this Cisco MX60W, u-boot sets the local-mac-address property. Unfortunately by default, the MAC is wrong and is actually located on a UBI partition. Which means nvmem needs to be used to grab it. In the case where that fails, EMAC fails to initialize instead of generating a random MAC as many other drivers do. Match behavior with other drivers to have a working ethernet interface. Signed-off-by: Rosen Penev Reviewed-by: Shannon Nelson Signed-off-by: Paolo Abeni --- drivers/net/ethernet/ibm/emac/core.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/ibm/emac/core.c b/drivers/net/ethernet/ibm/emac/core.c index 1f45f2a78829..25b8a3556004 100644 --- a/drivers/net/ethernet/ibm/emac/core.c +++ b/drivers/net/ethernet/ibm/emac/core.c @@ -2937,9 +2937,12 @@ static int emac_init_config(struct emac_instance *dev) /* Read MAC-address */ err = of_get_ethdev_address(np, dev->ndev); - if (err) - return dev_err_probe(&dev->ofdev->dev, err, - "Can't get valid [local-]mac-address from OF !\n"); + if (err == -EPROBE_DEFER) + return err; + if (err) { + dev_warn(&dev->ofdev->dev, "Can't get valid mac-address. Generating random."); + eth_hw_addr_random(dev->ndev); + } /* IAHT and GAHT filter parameterization */ if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) {