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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:39:57 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-18 17:39:57 +0000
commitdc50eab76b709d68175a358d6e23a5a3890764d3 (patch)
treec754d0390db060af0213ff994f0ac310e4cfd6e9 /drivers/net/ethernet/xscale
parentAdding debian version 6.6.15-2. (diff)
downloadlinux-dc50eab76b709d68175a358d6e23a5a3890764d3.tar.xz
linux-dc50eab76b709d68175a358d6e23a5a3890764d3.zip
Merging upstream version 6.7.7.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/net/ethernet/xscale')
-rw-r--r--drivers/net/ethernet/xscale/ixp4xx_eth.c77
1 files changed, 69 insertions, 8 deletions
diff --git a/drivers/net/ethernet/xscale/ixp4xx_eth.c b/drivers/net/ethernet/xscale/ixp4xx_eth.c
index 3b0c5f1774..e0d26148df 100644
--- a/drivers/net/ethernet/xscale/ixp4xx_eth.c
+++ b/drivers/net/ethernet/xscale/ixp4xx_eth.c
@@ -24,6 +24,7 @@
#include <linux/dma-mapping.h>
#include <linux/dmapool.h>
#include <linux/etherdevice.h>
+#include <linux/if_vlan.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/net_tstamp.h>
@@ -63,7 +64,15 @@
#define POOL_ALLOC_SIZE (sizeof(struct desc) * (RX_DESCS + TX_DESCS))
#define REGS_SIZE 0x1000
-#define MAX_MRU 1536 /* 0x600 */
+
+/* MRU is said to be 14320 in a code dump, the SW manual says that
+ * MRU/MTU is 16320 and includes VLAN and ethernet headers.
+ * See "IXP400 Software Programmer's Guide" section 10.3.2, page 161.
+ *
+ * FIXME: we have chosen the safe default (14320) but if you can test
+ * jumboframes, experiment with 16320 and see what happens!
+ */
+#define MAX_MRU (14320 - VLAN_ETH_HLEN)
#define RX_BUFF_SIZE ALIGN((NET_IP_ALIGN) + MAX_MRU, 4)
#define NAPI_WEIGHT 16
@@ -154,7 +163,6 @@ typedef void buffer_t;
/* Information about built-in Ethernet MAC interfaces */
struct eth_plat_info {
- u8 phy; /* MII PHY ID, 0 - 31 */
u8 rxq; /* configurable, currently 0 - 31 only */
u8 txreadyq;
u8 hwaddr[ETH_ALEN];
@@ -714,9 +722,9 @@ static int eth_poll(struct napi_struct *napi, int budget)
napi_complete(napi);
qmgr_enable_irq(rxq);
if (!qmgr_stat_below_low_watermark(rxq) &&
- napi_reschedule(napi)) { /* not empty again */
+ napi_schedule(napi)) { /* not empty again */
#if DEBUG_RX
- netdev_debug(dev, "eth_poll napi_reschedule succeeded\n");
+ netdev_debug(dev, "eth_poll napi_schedule succeeded\n");
#endif
qmgr_disable_irq(rxq);
continue;
@@ -1182,6 +1190,54 @@ static void destroy_queues(struct port *port)
}
}
+static int ixp4xx_do_change_mtu(struct net_device *dev, int new_mtu)
+{
+ struct port *port = netdev_priv(dev);
+ struct npe *npe = port->npe;
+ int framesize, chunks;
+ struct msg msg = {};
+
+ /* adjust for ethernet headers */
+ framesize = new_mtu + VLAN_ETH_HLEN;
+ /* max rx/tx 64 byte chunks */
+ chunks = DIV_ROUND_UP(framesize, 64);
+
+ msg.cmd = NPE_SETMAXFRAMELENGTHS;
+ msg.eth_id = port->id;
+
+ /* Firmware wants to know buffer size in 64 byte chunks */
+ msg.byte2 = chunks << 8;
+ msg.byte3 = chunks << 8;
+
+ msg.byte4 = msg.byte6 = framesize >> 8;
+ msg.byte5 = msg.byte7 = framesize & 0xff;
+
+ if (npe_send_recv_message(npe, &msg, "ETH_SET_MAX_FRAME_LENGTH"))
+ return -EIO;
+ netdev_dbg(dev, "set MTU on NPE %s to %d bytes\n",
+ npe_name(npe), new_mtu);
+
+ return 0;
+}
+
+static int ixp4xx_eth_change_mtu(struct net_device *dev, int new_mtu)
+{
+ int ret;
+
+ /* MTU can only be changed when the interface is up. We also
+ * set the MTU from dev->mtu when opening the device.
+ */
+ if (dev->flags & IFF_UP) {
+ ret = ixp4xx_do_change_mtu(dev, new_mtu);
+ if (ret < 0)
+ return ret;
+ }
+
+ dev->mtu = new_mtu;
+
+ return 0;
+}
+
static int eth_open(struct net_device *dev)
{
struct port *port = netdev_priv(dev);
@@ -1232,6 +1288,8 @@ static int eth_open(struct net_device *dev)
if (npe_send_recv_message(port->npe, &msg, "ETH_SET_FIREWALL_MODE"))
return -EIO;
+ ixp4xx_do_change_mtu(dev, dev->mtu);
+
if ((err = request_queues(port)) != 0)
return err;
@@ -1374,6 +1432,7 @@ static int eth_close(struct net_device *dev)
static const struct net_device_ops ixp4xx_netdev_ops = {
.ndo_open = eth_open,
.ndo_stop = eth_close,
+ .ndo_change_mtu = ixp4xx_eth_change_mtu,
.ndo_start_xmit = eth_xmit,
.ndo_set_rx_mode = eth_set_mcast_list,
.ndo_eth_ioctl = eth_ioctl,
@@ -1488,6 +1547,9 @@ static int ixp4xx_eth_probe(struct platform_device *pdev)
ndev->dev.dma_mask = dev->dma_mask;
ndev->dev.coherent_dma_mask = dev->coherent_dma_mask;
+ ndev->min_mtu = ETH_MIN_MTU;
+ ndev->max_mtu = MAX_MRU;
+
netif_napi_add_weight(ndev, &port->napi, eth_poll, NAPI_WEIGHT);
if (!(port->npe = npe_request(NPE_ID(port->id))))
@@ -1520,7 +1582,7 @@ static int ixp4xx_eth_probe(struct platform_device *pdev)
if ((err = register_netdev(ndev)))
goto err_phy_dis;
- netdev_info(ndev, "%s: MII PHY %i on %s\n", ndev->name, plat->phy,
+ netdev_info(ndev, "%s: MII PHY %s on %s\n", ndev->name, phydev_name(phydev),
npe_name(port->npe));
return 0;
@@ -1533,7 +1595,7 @@ err_free_mem:
return err;
}
-static int ixp4xx_eth_remove(struct platform_device *pdev)
+static void ixp4xx_eth_remove(struct platform_device *pdev)
{
struct net_device *ndev = platform_get_drvdata(pdev);
struct phy_device *phydev = ndev->phydev;
@@ -1544,7 +1606,6 @@ static int ixp4xx_eth_remove(struct platform_device *pdev)
ixp4xx_mdio_remove();
npe_port_tab[NPE_ID(port->id)] = NULL;
npe_release(port->npe);
- return 0;
}
static const struct of_device_id ixp4xx_eth_of_match[] = {
@@ -1560,7 +1621,7 @@ static struct platform_driver ixp4xx_eth_driver = {
.of_match_table = of_match_ptr(ixp4xx_eth_of_match),
},
.probe = ixp4xx_eth_probe,
- .remove = ixp4xx_eth_remove,
+ .remove_new = ixp4xx_eth_remove,
};
module_platform_driver(ixp4xx_eth_driver);