// SPDX-License-Identifier: GPL-2.0-only
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/*
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* sonic.c
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*
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* (C) 2005 Finn Thain
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*
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* Converted to DMA API, added zero-copy buffer handling, and
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* (from the mac68k project) introduced dhd's support for 16-bit cards.
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*
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* (C) 1996,1998 by Thomas Bogendoerfer (tsbogend@alpha.franken.de)
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*
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* This driver is based on work from Andreas Busse, but most of
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* the code is rewritten.
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*
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* (C) 1995 by Andreas Busse (andy@waldorf-gmbh.de)
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*
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* Core code included by system sonic drivers
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*
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* And... partially rewritten again by David Huggins-Daines in order
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* to cope with screwed up Macintosh NICs that may or may not use
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* 16-bit DMA.
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*
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* (C) 1999 David Huggins-Daines <dhd@debian.org>
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*
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*/
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/*
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* Sources: Olivetti M700-10 Risc Personal Computer hardware handbook,
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* National Semiconductors data sheet for the DP83932B Sonic Ethernet
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* controller, and the files "8390.c" and "skeleton.c" in this directory.
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*
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* Additional sources: Nat Semi data sheet for the DP83932C and Nat Semi
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* Application Note AN-746, the files "lance.c" and "ibmlana.c". See also
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* the NetBSD file "sys/arch/mac68k/dev/if_sn.c".
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*/
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static unsigned int version_printed;
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static int sonic_debug = -1;
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module_param(sonic_debug, int, 0);
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MODULE_PARM_DESC(sonic_debug, "debug message level");
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static void sonic_msg_init(struct net_device *dev)
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{
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struct sonic_local *lp = netdev_priv(dev);
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lp->msg_enable = netif_msg_init(sonic_debug, 0);
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if (version_printed++ == 0)
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netif_dbg(lp, drv, dev, "%s", version);
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}
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static int sonic_alloc_descriptors(struct net_device *dev)
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{
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struct sonic_local *lp = netdev_priv(dev);
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/* Allocate a chunk of memory for the descriptors. Note that this
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* must not cross a 64K boundary. It is smaller than one page which
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* means that page alignment is a sufficient condition.
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*/
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lp->descriptors =
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dma_alloc_coherent(lp->device,
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SIZEOF_SONIC_DESC *
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SONIC_BUS_SCALE(lp->dma_bitmode),
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&lp->descriptors_laddr, GFP_KERNEL);
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if (!lp->descriptors)
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return -ENOMEM;
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lp->cda = lp->descriptors;
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lp->tda = lp->cda + SIZEOF_SONIC_CDA *
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SONIC_BUS_SCALE(lp->dma_bitmode);
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lp->rda = lp->tda + SIZEOF_SONIC_TD * SONIC_NUM_TDS *
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SONIC_BUS_SCALE(lp->dma_bitmode);
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lp->rra = lp->rda + SIZEOF_SONIC_RD * SONIC_NUM_RDS *
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SONIC_BUS_SCALE(lp->dma_bitmode);
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lp->cda_laddr = lp->descriptors_laddr;
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lp->tda_laddr = lp->cda_laddr + SIZEOF_SONIC_CDA *
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SONIC_BUS_SCALE(lp->dma_bitmode);
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lp->rda_laddr = lp->tda_laddr + SIZEOF_SONIC_TD * SONIC_NUM_TDS *
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SONIC_BUS_SCALE(lp->dma_bitmode);
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lp->rra_laddr = lp->rda_laddr + SIZEOF_SONIC_RD * SONIC_NUM_RDS *
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SONIC_BUS_SCALE(lp->dma_bitmode);
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return 0;
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}
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/*
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* Open/initialize the SONIC controller.
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*
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* This routine should set everything up anew at each open, even
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* registers that "should" only need to be set once at boot, so that
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* there is non-reboot way to recover if something goes wrong.
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*/
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static int sonic_open(struct net_device *dev)
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{
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struct sonic_local *lp = netdev_priv(dev);
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int i;
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netif_dbg(lp, ifup, dev, "%s: initializing sonic driver\n", __func__);
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spin_lock_init(&lp->lock);
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for (i = 0; i < SONIC_NUM_RRS; i++) {
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struct sk_buff *skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
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if (skb == NULL) {
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while(i > 0) { /* free any that were allocated successfully */
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i--;
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dev_kfree_skb(lp->rx_skb[i]);
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lp->rx_skb[i] = NULL;
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}
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printk(KERN_ERR "%s: couldn't allocate receive buffers\n",
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dev->name);
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return -ENOMEM;
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}
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/* align IP header unless DMA requires otherwise */
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if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
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skb_reserve(skb, 2);
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lp->rx_skb[i] = skb;
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}
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for (i = 0; i < SONIC_NUM_RRS; i++) {
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dma_addr_t laddr = dma_map_single(lp->device, skb_put(lp->rx_skb[i], SONIC_RBSIZE),
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SONIC_RBSIZE, DMA_FROM_DEVICE);
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if (dma_mapping_error(lp->device, laddr)) {
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while(i > 0) { /* free any that were mapped successfully */
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i--;
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dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
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lp->rx_laddr[i] = (dma_addr_t)0;
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}
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for (i = 0; i < SONIC_NUM_RRS; i++) {
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dev_kfree_skb(lp->rx_skb[i]);
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lp->rx_skb[i] = NULL;
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}
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printk(KERN_ERR "%s: couldn't map rx DMA buffers\n",
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dev->name);
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return -ENOMEM;
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}
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lp->rx_laddr[i] = laddr;
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}
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/*
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* Initialize the SONIC
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*/
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sonic_init(dev, true);
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netif_start_queue(dev);
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netif_dbg(lp, ifup, dev, "%s: Initialization done\n", __func__);
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return 0;
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}
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/* Wait for the SONIC to become idle. */
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static void sonic_quiesce(struct net_device *dev, u16 mask, bool may_sleep)
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{
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struct sonic_local * __maybe_unused lp = netdev_priv(dev);
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int i;
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u16 bits;
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for (i = 0; i < 1000; ++i) {
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bits = SONIC_READ(SONIC_CMD) & mask;
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if (!bits)
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return;
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if (!may_sleep)
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udelay(20);
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else
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usleep_range(100, 200);
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}
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WARN_ONCE(1, "command deadline expired! 0x%04x\n", bits);
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}
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/*
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* Close the SONIC device
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*/
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static int sonic_close(struct net_device *dev)
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{
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struct sonic_local *lp = netdev_priv(dev);
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int i;
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netif_dbg(lp, ifdown, dev, "%s\n", __func__);
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netif_stop_queue(dev);
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/*
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* stop the SONIC, disable interrupts
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*/
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SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
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sonic_quiesce(dev, SONIC_CR_ALL, true);
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SONIC_WRITE(SONIC_IMR, 0);
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SONIC_WRITE(SONIC_ISR, 0x7fff);
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SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
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/* unmap and free skbs that haven't been transmitted */
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for (i = 0; i < SONIC_NUM_TDS; i++) {
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if(lp->tx_laddr[i]) {
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dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
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lp->tx_laddr[i] = (dma_addr_t)0;
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}
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if(lp->tx_skb[i]) {
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dev_kfree_skb(lp->tx_skb[i]);
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lp->tx_skb[i] = NULL;
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}
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}
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/* unmap and free the receive buffers */
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for (i = 0; i < SONIC_NUM_RRS; i++) {
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if(lp->rx_laddr[i]) {
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dma_unmap_single(lp->device, lp->rx_laddr[i], SONIC_RBSIZE, DMA_FROM_DEVICE);
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lp->rx_laddr[i] = (dma_addr_t)0;
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}
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if(lp->rx_skb[i]) {
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dev_kfree_skb(lp->rx_skb[i]);
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lp->rx_skb[i] = NULL;
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}
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}
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return 0;
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}
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static void sonic_tx_timeout(struct net_device *dev, unsigned int txqueue)
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{
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struct sonic_local *lp = netdev_priv(dev);
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int i;
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/*
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* put the Sonic into software-reset mode and
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* disable all interrupts before releasing DMA buffers
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*/
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SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS);
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sonic_quiesce(dev, SONIC_CR_ALL, false);
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SONIC_WRITE(SONIC_IMR, 0);
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SONIC_WRITE(SONIC_ISR, 0x7fff);
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SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
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/* We could resend the original skbs. Easier to re-initialise. */
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for (i = 0; i < SONIC_NUM_TDS; i++) {
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if(lp->tx_laddr[i]) {
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dma_unmap_single(lp->device, lp->tx_laddr[i], lp->tx_len[i], DMA_TO_DEVICE);
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lp->tx_laddr[i] = (dma_addr_t)0;
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}
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if(lp->tx_skb[i]) {
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dev_kfree_skb(lp->tx_skb[i]);
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lp->tx_skb[i] = NULL;
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}
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}
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/* Try to restart the adaptor. */
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sonic_init(dev, false);
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lp->stats.tx_errors++;
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netif_trans_update(dev); /* prevent tx timeout */
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netif_wake_queue(dev);
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}
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/*
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* transmit packet
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*
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* Appends new TD during transmission thus avoiding any TX interrupts
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* until we run out of TDs.
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* This routine interacts closely with the ISR in that it may,
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* set tx_skb[i]
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* reset the status flags of the new TD
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* set and reset EOL flags
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* stop the tx queue
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* The ISR interacts with this routine in various ways. It may,
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* reset tx_skb[i]
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* test the EOL and status flags of the TDs
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* wake the tx queue
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* Concurrently with all of this, the SONIC is potentially writing to
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* the status flags of the TDs.
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*/
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static int sonic_send_packet(struct sk_buff *skb, struct net_device *dev)
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{
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struct sonic_local *lp = netdev_priv(dev);
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dma_addr_t laddr;
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int length;
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int entry;
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unsigned long flags;
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netif_dbg(lp, tx_queued, dev, "%s: skb=%p\n", __func__, skb);
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length = skb->len;
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if (length < ETH_ZLEN) {
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if (skb_padto(skb, ETH_ZLEN))
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return NETDEV_TX_OK;
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length = ETH_ZLEN;
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}
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/*
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* Map the packet data into the logical DMA address space
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*/
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laddr = dma_map_single(lp->device, skb->data, length, DMA_TO_DEVICE);
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if (!laddr) {
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pr_err_ratelimited("%s: failed to map tx DMA buffer.\n", dev->name);
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dev_kfree_skb_any(skb);
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return NETDEV_TX_OK;
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}
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spin_lock_irqsave(&lp->lock, flags);
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entry = (lp->eol_tx + 1) & SONIC_TDS_MASK;
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sonic_tda_put(dev, entry, SONIC_TD_STATUS, 0); /* clear status */
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sonic_tda_put(dev, entry, SONIC_TD_FRAG_COUNT, 1); /* single fragment */
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sonic_tda_put(dev, entry, SONIC_TD_PKTSIZE, length); /* length of packet */
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sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_L, laddr & 0xffff);
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sonic_tda_put(dev, entry, SONIC_TD_FRAG_PTR_H, laddr >> 16);
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sonic_tda_put(dev, entry, SONIC_TD_FRAG_SIZE, length);
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sonic_tda_put(dev, entry, SONIC_TD_LINK,
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sonic_tda_get(dev, entry, SONIC_TD_LINK) | SONIC_EOL);
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sonic_tda_put(dev, lp->eol_tx, SONIC_TD_LINK, ~SONIC_EOL &
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sonic_tda_get(dev, lp->eol_tx, SONIC_TD_LINK));
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netif_dbg(lp, tx_queued, dev, "%s: issuing Tx command\n", __func__);
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SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
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lp->tx_len[entry] = length;
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lp->tx_laddr[entry] = laddr;
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lp->tx_skb[entry] = skb;
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lp->eol_tx = entry;
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entry = (entry + 1) & SONIC_TDS_MASK;
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if (lp->tx_skb[entry]) {
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/* The ring is full, the ISR has yet to process the next TD. */
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netif_dbg(lp, tx_queued, dev, "%s: stopping queue\n", __func__);
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netif_stop_queue(dev);
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/* after this packet, wait for ISR to free up some TDAs */
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}
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spin_unlock_irqrestore(&lp->lock, flags);
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return NETDEV_TX_OK;
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}
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/*
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* The typical workload of the driver:
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* Handle the network interface interrupts.
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*/
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static irqreturn_t sonic_interrupt(int irq, void *dev_id)
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{
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struct net_device *dev = dev_id;
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struct sonic_local *lp = netdev_priv(dev);
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int status;
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unsigned long flags;
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/* The lock has two purposes. Firstly, it synchronizes sonic_interrupt()
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* with sonic_send_packet() so that the two functions can share state.
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* Secondly, it makes sonic_interrupt() re-entrant, as that is required
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* by macsonic which must use two IRQs with different priority levels.
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*/
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spin_lock_irqsave(&lp->lock, flags);
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status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT;
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if (!status) {
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spin_unlock_irqrestore(&lp->lock, flags);
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return IRQ_NONE;
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}
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do {
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SONIC_WRITE(SONIC_ISR, status); /* clear the interrupt(s) */
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if (status & SONIC_INT_PKTRX) {
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netif_dbg(lp, intr, dev, "%s: packet rx\n", __func__);
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sonic_rx(dev); /* got packet(s) */
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}
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if (status & SONIC_INT_TXDN) {
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int entry = lp->cur_tx;
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int td_status;
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int freed_some = 0;
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/* The state of a Transmit Descriptor may be inferred
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* from { tx_skb[entry], td_status } as follows.
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* { clear, clear } => the TD has never been used
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* { set, clear } => the TD was handed to SONIC
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* { set, set } => the TD was handed back
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* { clear, set } => the TD is available for re-use
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*/
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netif_dbg(lp, intr, dev, "%s: tx done\n", __func__);
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while (lp->tx_skb[entry] != NULL) {
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if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
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break;
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if (td_status & SONIC_TCR_PTX) {
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lp->stats.tx_packets++;
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lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
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} else {
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if (td_status & (SONIC_TCR_EXD |
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SONIC_TCR_EXC | SONIC_TCR_BCM))
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lp->stats.tx_aborted_errors++;
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if (td_status &
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(SONIC_TCR_NCRS | SONIC_TCR_CRLS))
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lp->stats.tx_carrier_errors++;
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if (td_status & SONIC_TCR_OWC)
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lp->stats.tx_window_errors++;
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if (td_status & SONIC_TCR_FU)
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lp->stats.tx_fifo_errors++;
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}
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/* We must free the original skb */
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dev_consume_skb_irq(lp->tx_skb[entry]);
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lp->tx_skb[entry] = NULL;
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/* and unmap DMA buffer */
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dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
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lp->tx_laddr[entry] = (dma_addr_t)0;
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freed_some = 1;
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if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
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entry = (entry + 1) & SONIC_TDS_MASK;
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break;
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}
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entry = (entry + 1) & SONIC_TDS_MASK;
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}
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if (freed_some || lp->tx_skb[entry] == NULL)
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netif_wake_queue(dev); /* The ring is no longer full */
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lp->cur_tx = entry;
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}
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/*
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* check error conditions
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*/
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if (status & SONIC_INT_RFO) {
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netif_dbg(lp, rx_err, dev, "%s: rx fifo overrun\n",
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__func__);
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}
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if (status & SONIC_INT_RDE) {
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netif_dbg(lp, rx_err, dev, "%s: rx descriptors exhausted\n",
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__func__);
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}
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if (status & SONIC_INT_RBAE) {
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netif_dbg(lp, rx_err, dev, "%s: rx buffer area exceeded\n",
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__func__);
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}
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/* counter overruns; all counters are 16bit wide */
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if (status & SONIC_INT_FAE)
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lp->stats.rx_frame_errors += 65536;
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if (status & SONIC_INT_CRC)
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lp->stats.rx_crc_errors += 65536;
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if (status & SONIC_INT_MP)
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lp->stats.rx_missed_errors += 65536;
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/* transmit error */
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if (status & SONIC_INT_TXER) {
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u16 tcr = SONIC_READ(SONIC_TCR);
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netif_dbg(lp, tx_err, dev, "%s: TXER intr, TCR %04x\n",
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__func__, tcr);
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if (tcr & (SONIC_TCR_EXD | SONIC_TCR_EXC |
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SONIC_TCR_FU | SONIC_TCR_BCM)) {
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/* Aborted transmission. Try again. */
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netif_stop_queue(dev);
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SONIC_WRITE(SONIC_CMD, SONIC_CR_TXP);
|
}
|
}
|
|
/* bus retry */
|
if (status & SONIC_INT_BR) {
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printk(KERN_ERR "%s: Bus retry occurred! Device interrupt disabled.\n",
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dev->name);
|
/* ... to help debug DMA problems causing endless interrupts. */
|
/* Bounce the eth interface to turn on the interrupt again. */
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SONIC_WRITE(SONIC_IMR, 0);
|
}
|
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status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT;
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} while (status);
|
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spin_unlock_irqrestore(&lp->lock, flags);
|
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return IRQ_HANDLED;
|
}
|
|
/* Return the array index corresponding to a given Receive Buffer pointer. */
|
static int index_from_addr(struct sonic_local *lp, dma_addr_t addr,
|
unsigned int last)
|
{
|
unsigned int i = last;
|
|
do {
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i = (i + 1) & SONIC_RRS_MASK;
|
if (addr == lp->rx_laddr[i])
|
return i;
|
} while (i != last);
|
|
return -ENOENT;
|
}
|
|
/* Allocate and map a new skb to be used as a receive buffer. */
|
static bool sonic_alloc_rb(struct net_device *dev, struct sonic_local *lp,
|
struct sk_buff **new_skb, dma_addr_t *new_addr)
|
{
|
*new_skb = netdev_alloc_skb(dev, SONIC_RBSIZE + 2);
|
if (!*new_skb)
|
return false;
|
|
if (SONIC_BUS_SCALE(lp->dma_bitmode) == 2)
|
skb_reserve(*new_skb, 2);
|
|
*new_addr = dma_map_single(lp->device, skb_put(*new_skb, SONIC_RBSIZE),
|
SONIC_RBSIZE, DMA_FROM_DEVICE);
|
if (!*new_addr) {
|
dev_kfree_skb(*new_skb);
|
*new_skb = NULL;
|
return false;
|
}
|
|
return true;
|
}
|
|
/* Place a new receive resource in the Receive Resource Area and update RWP. */
|
static void sonic_update_rra(struct net_device *dev, struct sonic_local *lp,
|
dma_addr_t old_addr, dma_addr_t new_addr)
|
{
|
unsigned int entry = sonic_rr_entry(dev, SONIC_READ(SONIC_RWP));
|
unsigned int end = sonic_rr_entry(dev, SONIC_READ(SONIC_RRP));
|
u32 buf;
|
|
/* The resources in the range [RRP, RWP) belong to the SONIC. This loop
|
* scans the other resources in the RRA, those in the range [RWP, RRP).
|
*/
|
do {
|
buf = (sonic_rra_get(dev, entry, SONIC_RR_BUFADR_H) << 16) |
|
sonic_rra_get(dev, entry, SONIC_RR_BUFADR_L);
|
|
if (buf == old_addr)
|
break;
|
|
entry = (entry + 1) & SONIC_RRS_MASK;
|
} while (entry != end);
|
|
WARN_ONCE(buf != old_addr, "failed to find resource!\n");
|
|
sonic_rra_put(dev, entry, SONIC_RR_BUFADR_H, new_addr >> 16);
|
sonic_rra_put(dev, entry, SONIC_RR_BUFADR_L, new_addr & 0xffff);
|
|
entry = (entry + 1) & SONIC_RRS_MASK;
|
|
SONIC_WRITE(SONIC_RWP, sonic_rr_addr(dev, entry));
|
}
|
|
/*
|
* We have a good packet(s), pass it/them up the network stack.
|
*/
|
static void sonic_rx(struct net_device *dev)
|
{
|
struct sonic_local *lp = netdev_priv(dev);
|
int entry = lp->cur_rx;
|
int prev_entry = lp->eol_rx;
|
bool rbe = false;
|
|
while (sonic_rda_get(dev, entry, SONIC_RD_IN_USE) == 0) {
|
u16 status = sonic_rda_get(dev, entry, SONIC_RD_STATUS);
|
|
/* If the RD has LPKT set, the chip has finished with the RB */
|
if ((status & SONIC_RCR_PRX) && (status & SONIC_RCR_LPKT)) {
|
struct sk_buff *new_skb;
|
dma_addr_t new_laddr;
|
u32 addr = (sonic_rda_get(dev, entry,
|
SONIC_RD_PKTPTR_H) << 16) |
|
sonic_rda_get(dev, entry, SONIC_RD_PKTPTR_L);
|
int i = index_from_addr(lp, addr, entry);
|
|
if (i < 0) {
|
WARN_ONCE(1, "failed to find buffer!\n");
|
break;
|
}
|
|
if (sonic_alloc_rb(dev, lp, &new_skb, &new_laddr)) {
|
struct sk_buff *used_skb = lp->rx_skb[i];
|
int pkt_len;
|
|
/* Pass the used buffer up the stack */
|
dma_unmap_single(lp->device, addr, SONIC_RBSIZE,
|
DMA_FROM_DEVICE);
|
|
pkt_len = sonic_rda_get(dev, entry,
|
SONIC_RD_PKTLEN);
|
skb_trim(used_skb, pkt_len);
|
used_skb->protocol = eth_type_trans(used_skb,
|
dev);
|
netif_rx(used_skb);
|
lp->stats.rx_packets++;
|
lp->stats.rx_bytes += pkt_len;
|
|
lp->rx_skb[i] = new_skb;
|
lp->rx_laddr[i] = new_laddr;
|
} else {
|
/* Failed to obtain a new buffer so re-use it */
|
new_laddr = addr;
|
lp->stats.rx_dropped++;
|
}
|
/* If RBE is already asserted when RWP advances then
|
* it's safe to clear RBE after processing this packet.
|
*/
|
rbe = rbe || SONIC_READ(SONIC_ISR) & SONIC_INT_RBE;
|
sonic_update_rra(dev, lp, addr, new_laddr);
|
}
|
/*
|
* give back the descriptor
|
*/
|
sonic_rda_put(dev, entry, SONIC_RD_STATUS, 0);
|
sonic_rda_put(dev, entry, SONIC_RD_IN_USE, 1);
|
|
prev_entry = entry;
|
entry = (entry + 1) & SONIC_RDS_MASK;
|
}
|
|
lp->cur_rx = entry;
|
|
if (prev_entry != lp->eol_rx) {
|
/* Advance the EOL flag to put descriptors back into service */
|
sonic_rda_put(dev, prev_entry, SONIC_RD_LINK, SONIC_EOL |
|
sonic_rda_get(dev, prev_entry, SONIC_RD_LINK));
|
sonic_rda_put(dev, lp->eol_rx, SONIC_RD_LINK, ~SONIC_EOL &
|
sonic_rda_get(dev, lp->eol_rx, SONIC_RD_LINK));
|
lp->eol_rx = prev_entry;
|
}
|
|
if (rbe)
|
SONIC_WRITE(SONIC_ISR, SONIC_INT_RBE);
|
}
|
|
|
/*
|
* Get the current statistics.
|
* This may be called with the device open or closed.
|
*/
|
static struct net_device_stats *sonic_get_stats(struct net_device *dev)
|
{
|
struct sonic_local *lp = netdev_priv(dev);
|
|
/* read the tally counter from the SONIC and reset them */
|
lp->stats.rx_crc_errors += SONIC_READ(SONIC_CRCT);
|
SONIC_WRITE(SONIC_CRCT, 0xffff);
|
lp->stats.rx_frame_errors += SONIC_READ(SONIC_FAET);
|
SONIC_WRITE(SONIC_FAET, 0xffff);
|
lp->stats.rx_missed_errors += SONIC_READ(SONIC_MPT);
|
SONIC_WRITE(SONIC_MPT, 0xffff);
|
|
return &lp->stats;
|
}
|
|
|
/*
|
* Set or clear the multicast filter for this adaptor.
|
*/
|
static void sonic_multicast_list(struct net_device *dev)
|
{
|
struct sonic_local *lp = netdev_priv(dev);
|
unsigned int rcr;
|
struct netdev_hw_addr *ha;
|
unsigned char *addr;
|
int i;
|
|
rcr = SONIC_READ(SONIC_RCR) & ~(SONIC_RCR_PRO | SONIC_RCR_AMC);
|
rcr |= SONIC_RCR_BRD; /* accept broadcast packets */
|
|
if (dev->flags & IFF_PROMISC) { /* set promiscuous mode */
|
rcr |= SONIC_RCR_PRO;
|
} else {
|
if ((dev->flags & IFF_ALLMULTI) ||
|
(netdev_mc_count(dev) > 15)) {
|
rcr |= SONIC_RCR_AMC;
|
} else {
|
unsigned long flags;
|
|
netif_dbg(lp, ifup, dev, "%s: mc_count %d\n", __func__,
|
netdev_mc_count(dev));
|
sonic_set_cam_enable(dev, 1); /* always enable our own address */
|
i = 1;
|
netdev_for_each_mc_addr(ha, dev) {
|
addr = ha->addr;
|
sonic_cda_put(dev, i, SONIC_CD_CAP0, addr[1] << 8 | addr[0]);
|
sonic_cda_put(dev, i, SONIC_CD_CAP1, addr[3] << 8 | addr[2]);
|
sonic_cda_put(dev, i, SONIC_CD_CAP2, addr[5] << 8 | addr[4]);
|
sonic_set_cam_enable(dev, sonic_get_cam_enable(dev) | (1 << i));
|
i++;
|
}
|
SONIC_WRITE(SONIC_CDC, 16);
|
SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
|
|
/* LCAM and TXP commands can't be used simultaneously */
|
spin_lock_irqsave(&lp->lock, flags);
|
sonic_quiesce(dev, SONIC_CR_TXP, false);
|
SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
|
sonic_quiesce(dev, SONIC_CR_LCAM, false);
|
spin_unlock_irqrestore(&lp->lock, flags);
|
}
|
}
|
|
netif_dbg(lp, ifup, dev, "%s: setting RCR=%x\n", __func__, rcr);
|
|
SONIC_WRITE(SONIC_RCR, rcr);
|
}
|
|
|
/*
|
* Initialize the SONIC ethernet controller.
|
*/
|
static int sonic_init(struct net_device *dev, bool may_sleep)
|
{
|
struct sonic_local *lp = netdev_priv(dev);
|
int i;
|
|
/*
|
* put the Sonic into software-reset mode and
|
* disable all interrupts
|
*/
|
SONIC_WRITE(SONIC_IMR, 0);
|
SONIC_WRITE(SONIC_ISR, 0x7fff);
|
SONIC_WRITE(SONIC_CMD, SONIC_CR_RST);
|
|
/* While in reset mode, clear CAM Enable register */
|
SONIC_WRITE(SONIC_CE, 0);
|
|
/*
|
* clear software reset flag, disable receiver, clear and
|
* enable interrupts, then completely initialize the SONIC
|
*/
|
SONIC_WRITE(SONIC_CMD, 0);
|
SONIC_WRITE(SONIC_CMD, SONIC_CR_RXDIS | SONIC_CR_STP);
|
sonic_quiesce(dev, SONIC_CR_ALL, may_sleep);
|
|
/*
|
* initialize the receive resource area
|
*/
|
netif_dbg(lp, ifup, dev, "%s: initialize receive resource area\n",
|
__func__);
|
|
for (i = 0; i < SONIC_NUM_RRS; i++) {
|
u16 bufadr_l = (unsigned long)lp->rx_laddr[i] & 0xffff;
|
u16 bufadr_h = (unsigned long)lp->rx_laddr[i] >> 16;
|
sonic_rra_put(dev, i, SONIC_RR_BUFADR_L, bufadr_l);
|
sonic_rra_put(dev, i, SONIC_RR_BUFADR_H, bufadr_h);
|
sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_L, SONIC_RBSIZE >> 1);
|
sonic_rra_put(dev, i, SONIC_RR_BUFSIZE_H, 0);
|
}
|
|
/* initialize all RRA registers */
|
SONIC_WRITE(SONIC_RSA, sonic_rr_addr(dev, 0));
|
SONIC_WRITE(SONIC_REA, sonic_rr_addr(dev, SONIC_NUM_RRS));
|
SONIC_WRITE(SONIC_RRP, sonic_rr_addr(dev, 0));
|
SONIC_WRITE(SONIC_RWP, sonic_rr_addr(dev, SONIC_NUM_RRS - 1));
|
SONIC_WRITE(SONIC_URRA, lp->rra_laddr >> 16);
|
SONIC_WRITE(SONIC_EOBC, (SONIC_RBSIZE >> 1) - (lp->dma_bitmode ? 2 : 1));
|
|
/* load the resource pointers */
|
netif_dbg(lp, ifup, dev, "%s: issuing RRRA command\n", __func__);
|
|
SONIC_WRITE(SONIC_CMD, SONIC_CR_RRRA);
|
sonic_quiesce(dev, SONIC_CR_RRRA, may_sleep);
|
|
/*
|
* Initialize the receive descriptors so that they
|
* become a circular linked list, ie. let the last
|
* descriptor point to the first again.
|
*/
|
netif_dbg(lp, ifup, dev, "%s: initialize receive descriptors\n",
|
__func__);
|
|
for (i=0; i<SONIC_NUM_RDS; i++) {
|
sonic_rda_put(dev, i, SONIC_RD_STATUS, 0);
|
sonic_rda_put(dev, i, SONIC_RD_PKTLEN, 0);
|
sonic_rda_put(dev, i, SONIC_RD_PKTPTR_L, 0);
|
sonic_rda_put(dev, i, SONIC_RD_PKTPTR_H, 0);
|
sonic_rda_put(dev, i, SONIC_RD_SEQNO, 0);
|
sonic_rda_put(dev, i, SONIC_RD_IN_USE, 1);
|
sonic_rda_put(dev, i, SONIC_RD_LINK,
|
lp->rda_laddr +
|
((i+1) * SIZEOF_SONIC_RD * SONIC_BUS_SCALE(lp->dma_bitmode)));
|
}
|
/* fix last descriptor */
|
sonic_rda_put(dev, SONIC_NUM_RDS - 1, SONIC_RD_LINK,
|
(lp->rda_laddr & 0xffff) | SONIC_EOL);
|
lp->eol_rx = SONIC_NUM_RDS - 1;
|
lp->cur_rx = 0;
|
SONIC_WRITE(SONIC_URDA, lp->rda_laddr >> 16);
|
SONIC_WRITE(SONIC_CRDA, lp->rda_laddr & 0xffff);
|
|
/*
|
* initialize transmit descriptors
|
*/
|
netif_dbg(lp, ifup, dev, "%s: initialize transmit descriptors\n",
|
__func__);
|
|
for (i = 0; i < SONIC_NUM_TDS; i++) {
|
sonic_tda_put(dev, i, SONIC_TD_STATUS, 0);
|
sonic_tda_put(dev, i, SONIC_TD_CONFIG, 0);
|
sonic_tda_put(dev, i, SONIC_TD_PKTSIZE, 0);
|
sonic_tda_put(dev, i, SONIC_TD_FRAG_COUNT, 0);
|
sonic_tda_put(dev, i, SONIC_TD_LINK,
|
(lp->tda_laddr & 0xffff) +
|
(i + 1) * SIZEOF_SONIC_TD * SONIC_BUS_SCALE(lp->dma_bitmode));
|
lp->tx_skb[i] = NULL;
|
}
|
/* fix last descriptor */
|
sonic_tda_put(dev, SONIC_NUM_TDS - 1, SONIC_TD_LINK,
|
(lp->tda_laddr & 0xffff));
|
|
SONIC_WRITE(SONIC_UTDA, lp->tda_laddr >> 16);
|
SONIC_WRITE(SONIC_CTDA, lp->tda_laddr & 0xffff);
|
lp->cur_tx = 0;
|
lp->eol_tx = SONIC_NUM_TDS - 1;
|
|
/*
|
* put our own address to CAM desc[0]
|
*/
|
sonic_cda_put(dev, 0, SONIC_CD_CAP0, dev->dev_addr[1] << 8 | dev->dev_addr[0]);
|
sonic_cda_put(dev, 0, SONIC_CD_CAP1, dev->dev_addr[3] << 8 | dev->dev_addr[2]);
|
sonic_cda_put(dev, 0, SONIC_CD_CAP2, dev->dev_addr[5] << 8 | dev->dev_addr[4]);
|
sonic_set_cam_enable(dev, 1);
|
|
for (i = 0; i < 16; i++)
|
sonic_cda_put(dev, i, SONIC_CD_ENTRY_POINTER, i);
|
|
/*
|
* initialize CAM registers
|
*/
|
SONIC_WRITE(SONIC_CDP, lp->cda_laddr & 0xffff);
|
SONIC_WRITE(SONIC_CDC, 16);
|
|
/*
|
* load the CAM
|
*/
|
SONIC_WRITE(SONIC_CMD, SONIC_CR_LCAM);
|
sonic_quiesce(dev, SONIC_CR_LCAM, may_sleep);
|
|
/*
|
* enable receiver, disable loopback
|
* and enable all interrupts
|
*/
|
SONIC_WRITE(SONIC_RCR, SONIC_RCR_DEFAULT);
|
SONIC_WRITE(SONIC_TCR, SONIC_TCR_DEFAULT);
|
SONIC_WRITE(SONIC_ISR, 0x7fff);
|
SONIC_WRITE(SONIC_IMR, SONIC_IMR_DEFAULT);
|
SONIC_WRITE(SONIC_CMD, SONIC_CR_RXEN);
|
|
netif_dbg(lp, ifup, dev, "%s: new status=%x\n", __func__,
|
SONIC_READ(SONIC_CMD));
|
|
return 0;
|
}
|
|
MODULE_LICENSE("GPL");
|
