diff options
Diffstat (limited to 'drivers/net/pasemi_mac.c')
| -rw-r--r-- | drivers/net/pasemi_mac.c | 1910 |
1 files changed, 0 insertions, 1910 deletions
diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c deleted file mode 100644 index 9ec112c..0000000 --- a/drivers/net/pasemi_mac.c +++ /dev/null @@ -1,1910 +0,0 @@ -/* - * Copyright (C) 2006-2007 PA Semi, Inc - * - * Driver for the PA Semi PWRficient onchip 1G/10G Ethernet MACs - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#include <linux/init.h> -#include <linux/module.h> -#include <linux/pci.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/dmaengine.h> -#include <linux/delay.h> -#include <linux/netdevice.h> -#include <linux/of_mdio.h> -#include <linux/etherdevice.h> -#include <asm/dma-mapping.h> -#include <linux/in.h> -#include <linux/skbuff.h> - -#include <linux/ip.h> -#include <linux/tcp.h> -#include <net/checksum.h> -#include <linux/inet_lro.h> -#include <linux/prefetch.h> - -#include <asm/irq.h> -#include <asm/firmware.h> -#include <asm/pasemi_dma.h> - -#include "pasemi_mac.h" - -/* We have our own align, since ppc64 in general has it at 0 because - * of design flaws in some of the server bridge chips. However, for - * PWRficient doing the unaligned copies is more expensive than doing - * unaligned DMA, so make sure the data is aligned instead. - */ -#define LOCAL_SKB_ALIGN 2 - -/* TODO list - * - * - Multicast support - * - Large MTU support - * - SW LRO - * - Multiqueue RX/TX - */ - -#define LRO_MAX_AGGR 64 - -#define PE_MIN_MTU 64 -#define PE_MAX_MTU 9000 -#define PE_DEF_MTU ETH_DATA_LEN - -#define DEFAULT_MSG_ENABLE \ - (NETIF_MSG_DRV | \ - NETIF_MSG_PROBE | \ - NETIF_MSG_LINK | \ - NETIF_MSG_TIMER | \ - NETIF_MSG_IFDOWN | \ - NETIF_MSG_IFUP | \ - NETIF_MSG_RX_ERR | \ - NETIF_MSG_TX_ERR) - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR ("Olof Johansson <olof@lixom.net>"); -MODULE_DESCRIPTION("PA Semi PWRficient Ethernet driver"); - -static int debug = -1; /* -1 == use DEFAULT_MSG_ENABLE as value */ -module_param(debug, int, 0); -MODULE_PARM_DESC(debug, "PA Semi MAC bitmapped debugging message enable value"); - -extern const struct ethtool_ops pasemi_mac_ethtool_ops; - -static int translation_enabled(void) -{ -#if defined(CONFIG_PPC_PASEMI_IOMMU_DMA_FORCE) - return 1; -#else - return firmware_has_feature(FW_FEATURE_LPAR); -#endif -} - -static void write_iob_reg(unsigned int reg, unsigned int val) -{ - pasemi_write_iob_reg(reg, val); -} - -static unsigned int read_mac_reg(const struct pasemi_mac *mac, unsigned int reg) -{ - return pasemi_read_mac_reg(mac->dma_if, reg); -} - -static void write_mac_reg(const struct pasemi_mac *mac, unsigned int reg, - unsigned int val) -{ - pasemi_write_mac_reg(mac->dma_if, reg, val); -} - -static unsigned int read_dma_reg(unsigned int reg) -{ - return pasemi_read_dma_reg(reg); -} - -static void write_dma_reg(unsigned int reg, unsigned int val) -{ - pasemi_write_dma_reg(reg, val); -} - -static struct pasemi_mac_rxring *rx_ring(const struct pasemi_mac *mac) -{ - return mac->rx; -} - -static struct pasemi_mac_txring *tx_ring(const struct pasemi_mac *mac) -{ - return mac->tx; -} - -static inline void prefetch_skb(const struct sk_buff *skb) -{ - const void *d = skb; - - prefetch(d); - prefetch(d+64); - prefetch(d+128); - prefetch(d+192); -} - -static int mac_to_intf(struct pasemi_mac *mac) -{ - struct pci_dev *pdev = mac->pdev; - u32 tmp; - int nintf, off, i, j; - int devfn = pdev->devfn; - - tmp = read_dma_reg(PAS_DMA_CAP_IFI); - nintf = (tmp & PAS_DMA_CAP_IFI_NIN_M) >> PAS_DMA_CAP_IFI_NIN_S; - off = (tmp & PAS_DMA_CAP_IFI_IOFF_M) >> PAS_DMA_CAP_IFI_IOFF_S; - - /* IOFF contains the offset to the registers containing the - * DMA interface-to-MAC-pci-id mappings, and NIN contains number - * of total interfaces. Each register contains 4 devfns. - * Just do a linear search until we find the devfn of the MAC - * we're trying to look up. - */ - - for (i = 0; i < (nintf+3)/4; i++) { - tmp = read_dma_reg(off+4*i); - for (j = 0; j < 4; j++) { - if (((tmp >> (8*j)) & 0xff) == devfn) - return i*4 + j; - } - } - return -1; -} - -static void pasemi_mac_intf_disable(struct pasemi_mac *mac) -{ - unsigned int flags; - - flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG); - flags &= ~PAS_MAC_CFG_PCFG_PE; - write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags); -} - -static void pasemi_mac_intf_enable(struct pasemi_mac *mac) -{ - unsigned int flags; - - flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG); - flags |= PAS_MAC_CFG_PCFG_PE; - write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags); -} - -static int pasemi_get_mac_addr(struct pasemi_mac *mac) -{ - struct pci_dev *pdev = mac->pdev; - struct device_node *dn = pci_device_to_OF_node(pdev); - int len; - const u8 *maddr; - u8 addr[6]; - - if (!dn) { - dev_dbg(&pdev->dev, - "No device node for mac, not configuring\n"); - return -ENOENT; - } - - maddr = of_get_property(dn, "local-mac-address", &len); - - if (maddr && len == 6) { - memcpy(mac->mac_addr, maddr, 6); - return 0; - } - - /* Some old versions of firmware mistakenly uses mac-address - * (and as a string) instead of a byte array in local-mac-address. - */ - - if (maddr == NULL) - maddr = of_get_property(dn, "mac-address", NULL); - - if (maddr == NULL) { - dev_warn(&pdev->dev, - "no mac address in device tree, not configuring\n"); - return -ENOENT; - } - - if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0], - &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) { - dev_warn(&pdev->dev, - "can't parse mac address, not configuring\n"); - return -EINVAL; - } - - memcpy(mac->mac_addr, addr, 6); - - return 0; -} - -static int pasemi_mac_set_mac_addr(struct net_device *dev, void *p) -{ - struct pasemi_mac *mac = netdev_priv(dev); - struct sockaddr *addr = p; - unsigned int adr0, adr1; - - if (!is_valid_ether_addr(addr->sa_data)) - return -EINVAL; - - memcpy(dev->dev_addr, addr->sa_data, dev->addr_len); - - adr0 = dev->dev_addr[2] << 24 | - dev->dev_addr[3] << 16 | - dev->dev_addr[4] << 8 | - dev->dev_addr[5]; - adr1 = read_mac_reg(mac, PAS_MAC_CFG_ADR1); - adr1 &= ~0xffff; - adr1 |= dev->dev_addr[0] << 8 | dev->dev_addr[1]; - - pasemi_mac_intf_disable(mac); - write_mac_reg(mac, PAS_MAC_CFG_ADR0, adr0); - write_mac_reg(mac, PAS_MAC_CFG_ADR1, adr1); - pasemi_mac_intf_enable(mac); - - return 0; -} - -static int get_skb_hdr(struct sk_buff *skb, void **iphdr, - void **tcph, u64 *hdr_flags, void *data) -{ - u64 macrx = (u64) data; - unsigned int ip_len; - struct iphdr *iph; - - /* IPv4 header checksum failed */ - if ((macrx & XCT_MACRX_HTY_M) != XCT_MACRX_HTY_IPV4_OK) - return -1; - - /* non tcp packet */ - skb_reset_network_header(skb); - iph = ip_hdr(skb); - if (iph->protocol != IPPROTO_TCP) - return -1; - - ip_len = ip_hdrlen(skb); - skb_set_transport_header(skb, ip_len); - *tcph = tcp_hdr(skb); - - /* check if ip header and tcp header are complete */ - if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb)) - return -1; - - *hdr_flags = LRO_IPV4 | LRO_TCP; - *iphdr = iph; - - return 0; -} - -static int pasemi_mac_unmap_tx_skb(struct pasemi_mac *mac, - const int nfrags, - struct sk_buff *skb, - const dma_addr_t *dmas) -{ - int f; - struct pci_dev *pdev = mac->dma_pdev; - - pci_unmap_single(pdev, dmas[0], skb_headlen(skb), PCI_DMA_TODEVICE); - - for (f = 0; f < nfrags; f++) { - skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; - - pci_unmap_page(pdev, dmas[f+1], frag->size, PCI_DMA_TODEVICE); - } - dev_kfree_skb_irq(skb); - - /* Freed descriptor slot + main SKB ptr + nfrags additional ptrs, - * aligned up to a power of 2 - */ - return (nfrags + 3) & ~1; -} - -static struct pasemi_mac_csring *pasemi_mac_setup_csring(struct pasemi_mac *mac) -{ - struct pasemi_mac_csring *ring; - u32 val; - unsigned int cfg; - int chno; - - ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_csring), - offsetof(struct pasemi_mac_csring, chan)); - - if (!ring) { - dev_err(&mac->pdev->dev, "Can't allocate checksum channel\n"); - goto out_chan; - } - - chno = ring->chan.chno; - - ring->size = CS_RING_SIZE; - ring->next_to_fill = 0; - - /* Allocate descriptors */ - if (pasemi_dma_alloc_ring(&ring->chan, CS_RING_SIZE)) - goto out_ring_desc; - - write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno), - PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma)); - val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32); - val |= PAS_DMA_TXCHAN_BASEU_SIZ(CS_RING_SIZE >> 3); - - write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val); - - ring->events[0] = pasemi_dma_alloc_flag(); - ring->events[1] = pasemi_dma_alloc_flag(); - if (ring->events[0] < 0 || ring->events[1] < 0) - goto out_flags; - - pasemi_dma_clear_flag(ring->events[0]); - pasemi_dma_clear_flag(ring->events[1]); - - ring->fun = pasemi_dma_alloc_fun(); - if (ring->fun < 0) - goto out_fun; - - cfg = PAS_DMA_TXCHAN_CFG_TY_FUNC | PAS_DMA_TXCHAN_CFG_UP | - PAS_DMA_TXCHAN_CFG_TATTR(ring->fun) | - PAS_DMA_TXCHAN_CFG_LPSQ | PAS_DMA_TXCHAN_CFG_LPDQ; - - if (translation_enabled()) - cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR; - - write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg); - - /* enable channel */ - pasemi_dma_start_chan(&ring->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ | - PAS_DMA_TXCHAN_TCMDSTA_DB | - PAS_DMA_TXCHAN_TCMDSTA_DE | - PAS_DMA_TXCHAN_TCMDSTA_DA); - - return ring; - -out_fun: -out_flags: - if (ring->events[0] >= 0) - pasemi_dma_free_flag(ring->events[0]); - if (ring->events[1] >= 0) - pasemi_dma_free_flag(ring->events[1]); - pasemi_dma_free_ring(&ring->chan); -out_ring_desc: - pasemi_dma_free_chan(&ring->chan); -out_chan: - - return NULL; -} - -static void pasemi_mac_setup_csrings(struct pasemi_mac *mac) -{ - int i; - mac->cs[0] = pasemi_mac_setup_csring(mac); - if (mac->type == MAC_TYPE_XAUI) - mac->cs[1] = pasemi_mac_setup_csring(mac); - else - mac->cs[1] = 0; - - for (i = 0; i < MAX_CS; i++) - if (mac->cs[i]) - mac->num_cs++; -} - -static void pasemi_mac_free_csring(struct pasemi_mac_csring *csring) -{ - pasemi_dma_stop_chan(&csring->chan); - pasemi_dma_free_flag(csring->events[0]); - pasemi_dma_free_flag(csring->events[1]); - pasemi_dma_free_ring(&csring->chan); - pasemi_dma_free_chan(&csring->chan); - pasemi_dma_free_fun(csring->fun); -} - -static int pasemi_mac_setup_rx_resources(const struct net_device *dev) -{ - struct pasemi_mac_rxring *ring; - struct pasemi_mac *mac = netdev_priv(dev); - int chno; - unsigned int cfg; - - ring = pasemi_dma_alloc_chan(RXCHAN, sizeof(struct pasemi_mac_rxring), - offsetof(struct pasemi_mac_rxring, chan)); - - if (!ring) { - dev_err(&mac->pdev->dev, "Can't allocate RX channel\n"); - goto out_chan; - } - chno = ring->chan.chno; - - spin_lock_init(&ring->lock); - - ring->size = RX_RING_SIZE; - ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) * - RX_RING_SIZE, GFP_KERNEL); - - if (!ring->ring_info) - goto out_ring_info; - - /* Allocate descriptors */ - if (pasemi_dma_alloc_ring(&ring->chan, RX_RING_SIZE)) - goto out_ring_desc; - - ring->buffers = dma_alloc_coherent(&mac->dma_pdev->dev, - RX_RING_SIZE * sizeof(u64), - &ring->buf_dma, GFP_KERNEL); - if (!ring->buffers) - goto out_ring_desc; - - memset(ring->buffers, 0, RX_RING_SIZE * sizeof(u64)); - - write_dma_reg(PAS_DMA_RXCHAN_BASEL(chno), - PAS_DMA_RXCHAN_BASEL_BRBL(ring->chan.ring_dma)); - - write_dma_reg(PAS_DMA_RXCHAN_BASEU(chno), - PAS_DMA_RXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32) | - PAS_DMA_RXCHAN_BASEU_SIZ(RX_RING_SIZE >> 3)); - - cfg = PAS_DMA_RXCHAN_CFG_HBU(2); - - if (translation_enabled()) - cfg |= PAS_DMA_RXCHAN_CFG_CTR; - - write_dma_reg(PAS_DMA_RXCHAN_CFG(chno), cfg); - - write_dma_reg(PAS_DMA_RXINT_BASEL(mac->dma_if), - PAS_DMA_RXINT_BASEL_BRBL(ring->buf_dma)); - - write_dma_reg(PAS_DMA_RXINT_BASEU(mac->dma_if), - PAS_DMA_RXINT_BASEU_BRBH(ring->buf_dma >> 32) | - PAS_DMA_RXINT_BASEU_SIZ(RX_RING_SIZE >> 3)); - - cfg = PAS_DMA_RXINT_CFG_DHL(2) | PAS_DMA_RXINT_CFG_L2 | - PAS_DMA_RXINT_CFG_LW | PAS_DMA_RXINT_CFG_RBP | - PAS_DMA_RXINT_CFG_HEN; - - if (translation_enabled()) - cfg |= PAS_DMA_RXINT_CFG_ITRR | PAS_DMA_RXINT_CFG_ITR; - - write_dma_reg(PAS_DMA_RXINT_CFG(mac->dma_if), cfg); - - ring->next_to_fill = 0; - ring->next_to_clean = 0; - ring->mac = mac; - mac->rx = ring; - - return 0; - -out_ring_desc: - kfree(ring->ring_info); -out_ring_info: - pasemi_dma_free_chan(&ring->chan); -out_chan: - return -ENOMEM; -} - -static struct pasemi_mac_txring * -pasemi_mac_setup_tx_resources(const struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - u32 val; - struct pasemi_mac_txring *ring; - unsigned int cfg; - int chno; - - ring = pasemi_dma_alloc_chan(TXCHAN, sizeof(struct pasemi_mac_txring), - offsetof(struct pasemi_mac_txring, chan)); - - if (!ring) { - dev_err(&mac->pdev->dev, "Can't allocate TX channel\n"); - goto out_chan; - } - - chno = ring->chan.chno; - - spin_lock_init(&ring->lock); - - ring->size = TX_RING_SIZE; - ring->ring_info = kzalloc(sizeof(struct pasemi_mac_buffer) * - TX_RING_SIZE, GFP_KERNEL); - if (!ring->ring_info) - goto out_ring_info; - - /* Allocate descriptors */ - if (pasemi_dma_alloc_ring(&ring->chan, TX_RING_SIZE)) - goto out_ring_desc; - - write_dma_reg(PAS_DMA_TXCHAN_BASEL(chno), - PAS_DMA_TXCHAN_BASEL_BRBL(ring->chan.ring_dma)); - val = PAS_DMA_TXCHAN_BASEU_BRBH(ring->chan.ring_dma >> 32); - val |= PAS_DMA_TXCHAN_BASEU_SIZ(TX_RING_SIZE >> 3); - - write_dma_reg(PAS_DMA_TXCHAN_BASEU(chno), val); - - cfg = PAS_DMA_TXCHAN_CFG_TY_IFACE | - PAS_DMA_TXCHAN_CFG_TATTR(mac->dma_if) | - PAS_DMA_TXCHAN_CFG_UP | - PAS_DMA_TXCHAN_CFG_WT(4); - - if (translation_enabled()) - cfg |= PAS_DMA_TXCHAN_CFG_TRD | PAS_DMA_TXCHAN_CFG_TRR; - - write_dma_reg(PAS_DMA_TXCHAN_CFG(chno), cfg); - - ring->next_to_fill = 0; - ring->next_to_clean = 0; - ring->mac = mac; - - return ring; - -out_ring_desc: - kfree(ring->ring_info); -out_ring_info: - pasemi_dma_free_chan(&ring->chan); -out_chan: - return NULL; -} - -static void pasemi_mac_free_tx_resources(struct pasemi_mac *mac) -{ - struct pasemi_mac_txring *txring = tx_ring(mac); - unsigned int i, j; - struct pasemi_mac_buffer *info; - dma_addr_t dmas[MAX_SKB_FRAGS+1]; - int freed, nfrags; - int start, limit; - - start = txring->next_to_clean; - limit = txring->next_to_fill; - - /* Compensate for when fill has wrapped and clean has not */ - if (start > limit) - limit += TX_RING_SIZE; - - for (i = start; i < limit; i += freed) { - info = &txring->ring_info[(i+1) & (TX_RING_SIZE-1)]; - if (info->dma && info->skb) { - nfrags = skb_shinfo(info->skb)->nr_frags; - for (j = 0; j <= nfrags; j++) - dmas[j] = txring->ring_info[(i+1+j) & - (TX_RING_SIZE-1)].dma; - freed = pasemi_mac_unmap_tx_skb(mac, nfrags, - info->skb, dmas); - } else - freed = 2; - } - - kfree(txring->ring_info); - pasemi_dma_free_chan(&txring->chan); - -} - -static void pasemi_mac_free_rx_buffers(struct pasemi_mac *mac) -{ - struct pasemi_mac_rxring *rx = rx_ring(mac); - unsigned int i; - struct pasemi_mac_buffer *info; - - for (i = 0; i < RX_RING_SIZE; i++) { - info = &RX_DESC_INFO(rx, i); - if (info->skb && info->dma) { - pci_unmap_single(mac->dma_pdev, - info->dma, - info->skb->len, - PCI_DMA_FROMDEVICE); - dev_kfree_skb_any(info->skb); - } - info->dma = 0; - info->skb = NULL; - } - - for (i = 0; i < RX_RING_SIZE; i++) - RX_BUFF(rx, i) = 0; -} - -static void pasemi_mac_free_rx_resources(struct pasemi_mac *mac) -{ - pasemi_mac_free_rx_buffers(mac); - - dma_free_coherent(&mac->dma_pdev->dev, RX_RING_SIZE * sizeof(u64), - rx_ring(mac)->buffers, rx_ring(mac)->buf_dma); - - kfree(rx_ring(mac)->ring_info); - pasemi_dma_free_chan(&rx_ring(mac)->chan); - mac->rx = NULL; -} - -static void pasemi_mac_replenish_rx_ring(const struct net_device *dev, - const int limit) -{ - const struct pasemi_mac *mac = netdev_priv(dev); - struct pasemi_mac_rxring *rx = rx_ring(mac); - int fill, count; - - if (limit <= 0) - return; - - fill = rx_ring(mac)->next_to_fill; - for (count = 0; count < limit; count++) { - struct pasemi_mac_buffer *info = &RX_DESC_INFO(rx, fill); - u64 *buff = &RX_BUFF(rx, fill); - struct sk_buff *skb; - dma_addr_t dma; - - /* Entry in use? */ - WARN_ON(*buff); - - skb = dev_alloc_skb(mac->bufsz); - skb_reserve(skb, LOCAL_SKB_ALIGN); - - if (unlikely(!skb)) - break; - - dma = pci_map_single(mac->dma_pdev, skb->data, - mac->bufsz - LOCAL_SKB_ALIGN, - PCI_DMA_FROMDEVICE); - - if (unlikely(pci_dma_mapping_error(mac->dma_pdev, dma))) { - dev_kfree_skb_irq(info->skb); - break; - } - - info->skb = skb; - info->dma = dma; - *buff = XCT_RXB_LEN(mac->bufsz) | XCT_RXB_ADDR(dma); - fill++; - } - - wmb(); - - write_dma_reg(PAS_DMA_RXINT_INCR(mac->dma_if), count); - - rx_ring(mac)->next_to_fill = (rx_ring(mac)->next_to_fill + count) & - (RX_RING_SIZE - 1); -} - -static void pasemi_mac_restart_rx_intr(const struct pasemi_mac *mac) -{ - struct pasemi_mac_rxring *rx = rx_ring(mac); - unsigned int reg, pcnt; - /* Re-enable packet count interrupts: finally - * ack the packet count interrupt we got in rx_intr. - */ - - pcnt = *rx->chan.status & PAS_STATUS_PCNT_M; - - reg = PAS_IOB_DMA_RXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_RXCH_RESET_PINTC; - - if (*rx->chan.status & PAS_STATUS_TIMER) - reg |= PAS_IOB_DMA_RXCH_RESET_TINTC; - - write_iob_reg(PAS_IOB_DMA_RXCH_RESET(mac->rx->chan.chno), reg); -} - -static void pasemi_mac_restart_tx_intr(const struct pasemi_mac *mac) -{ - unsigned int reg, pcnt; - - /* Re-enable packet count interrupts */ - pcnt = *tx_ring(mac)->chan.status & PAS_STATUS_PCNT_M; - - reg = PAS_IOB_DMA_TXCH_RESET_PCNT(pcnt) | PAS_IOB_DMA_TXCH_RESET_PINTC; - - write_iob_reg(PAS_IOB_DMA_TXCH_RESET(tx_ring(mac)->chan.chno), reg); -} - - -static inline void pasemi_mac_rx_error(const struct pasemi_mac *mac, - const u64 macrx) -{ - unsigned int rcmdsta, ccmdsta; - struct pasemi_dmachan *chan = &rx_ring(mac)->chan; - - if (!netif_msg_rx_err(mac)) - return; - - rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); - ccmdsta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(chan->chno)); - - printk(KERN_ERR "pasemi_mac: rx error. macrx %016llx, rx status %llx\n", - macrx, *chan->status); - - printk(KERN_ERR "pasemi_mac: rcmdsta %08x ccmdsta %08x\n", - rcmdsta, ccmdsta); -} - -static inline void pasemi_mac_tx_error(const struct pasemi_mac *mac, - const u64 mactx) -{ - unsigned int cmdsta; - struct pasemi_dmachan *chan = &tx_ring(mac)->chan; - - if (!netif_msg_tx_err(mac)) - return; - - cmdsta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(chan->chno)); - - printk(KERN_ERR "pasemi_mac: tx error. mactx 0x%016llx, "\ - "tx status 0x%016llx\n", mactx, *chan->status); - - printk(KERN_ERR "pasemi_mac: tcmdsta 0x%08x\n", cmdsta); -} - -static int pasemi_mac_clean_rx(struct pasemi_mac_rxring *rx, - const int limit) -{ - const struct pasemi_dmachan *chan = &rx->chan; - struct pasemi_mac *mac = rx->mac; - struct pci_dev *pdev = mac->dma_pdev; - unsigned int n; - int count, buf_index, tot_bytes, packets; - struct pasemi_mac_buffer *info; - struct sk_buff *skb; - unsigned int len; - u64 macrx, eval; - dma_addr_t dma; - - tot_bytes = 0; - packets = 0; - - spin_lock(&rx->lock); - - n = rx->next_to_clean; - - prefetch(&RX_DESC(rx, n)); - - for (count = 0; count < limit; count++) { - macrx = RX_DESC(rx, n); - prefetch(&RX_DESC(rx, n+4)); - - if ((macrx & XCT_MACRX_E) || - (*chan->status & PAS_STATUS_ERROR)) - pasemi_mac_rx_error(mac, macrx); - - if (!(macrx & XCT_MACRX_O)) - break; - - info = NULL; - - BUG_ON(!(macrx & XCT_MACRX_RR_8BRES)); - - eval = (RX_DESC(rx, n+1) & XCT_RXRES_8B_EVAL_M) >> - XCT_RXRES_8B_EVAL_S; - buf_index = eval-1; - - dma = (RX_DESC(rx, n+2) & XCT_PTR_ADDR_M); - info = &RX_DESC_INFO(rx, buf_index); - - skb = info->skb; - - prefetch_skb(skb); - - len = (macrx & XCT_MACRX_LLEN_M) >> XCT_MACRX_LLEN_S; - - pci_unmap_single(pdev, dma, mac->bufsz - LOCAL_SKB_ALIGN, - PCI_DMA_FROMDEVICE); - - if (macrx & XCT_MACRX_CRC) { - /* CRC error flagged */ - mac->netdev->stats.rx_errors++; - mac->netdev->stats.rx_crc_errors++; - /* No need to free skb, it'll be reused */ - goto next; - } - - info->skb = NULL; - info->dma = 0; - - if (likely((macrx & XCT_MACRX_HTY_M) == XCT_MACRX_HTY_IPV4_OK)) { - skb->ip_summed = CHECKSUM_UNNECESSARY; - skb->csum = (macrx & XCT_MACRX_CSUM_M) >> - XCT_MACRX_CSUM_S; - } else - skb_checksum_none_assert(skb); - - packets++; - tot_bytes += len; - - /* Don't include CRC */ - skb_put(skb, len-4); - - skb->protocol = eth_type_trans(skb, mac->netdev); - lro_receive_skb(&mac->lro_mgr, skb, (void *)macrx); - -next: - RX_DESC(rx, n) = 0; - RX_DESC(rx, n+1) = 0; - - /* Need to zero it out since hardware doesn't, since the - * replenish loop uses it to tell when it's done. - */ - RX_BUFF(rx, buf_index) = 0; - - n += 4; - } - - if (n > RX_RING_SIZE) { - /* Errata 5971 workaround: L2 target of headers */ - write_iob_reg(PAS_IOB_COM_PKTHDRCNT, 0); - n &= (RX_RING_SIZE-1); - } - - rx_ring(mac)->next_to_clean = n; - - lro_flush_all(&mac->lro_mgr); - - /* Increase is in number of 16-byte entries, and since each descriptor - * with an 8BRES takes up 3x8 bytes (padded to 4x8), increase with - * count*2. - */ - write_dma_reg(PAS_DMA_RXCHAN_INCR(mac->rx->chan.chno), count << 1); - - pasemi_mac_replenish_rx_ring(mac->netdev, count); - - mac->netdev->stats.rx_bytes += tot_bytes; - mac->netdev->stats.rx_packets += packets; - - spin_unlock(&rx_ring(mac)->lock); - - return count; -} - -/* Can't make this too large or we blow the kernel stack limits */ -#define TX_CLEAN_BATCHSIZE (128/MAX_SKB_FRAGS) - -static int pasemi_mac_clean_tx(struct pasemi_mac_txring *txring) -{ - struct pasemi_dmachan *chan = &txring->chan; - struct pasemi_mac *mac = txring->mac; - int i, j; - unsigned int start, descr_count, buf_count, batch_limit; - unsigned int ring_limit; - unsigned int total_count; - unsigned long flags; - struct sk_buff *skbs[TX_CLEAN_BATCHSIZE]; - dma_addr_t dmas[TX_CLEAN_BATCHSIZE][MAX_SKB_FRAGS+1]; - int nf[TX_CLEAN_BATCHSIZE]; - int nr_frags; - - total_count = 0; - batch_limit = TX_CLEAN_BATCHSIZE; -restart: - spin_lock_irqsave(&txring->lock, flags); - - start = txring->next_to_clean; - ring_limit = txring->next_to_fill; - - prefetch(&TX_DESC_INFO(txring, start+1).skb); - - /* Compensate for when fill has wrapped but clean has not */ - if (start > ring_limit) - ring_limit += TX_RING_SIZE; - - buf_count = 0; - descr_count = 0; - - for (i = start; - descr_count < batch_limit && i < ring_limit; - i += buf_count) { - u64 mactx = TX_DESC(txring, i); - struct sk_buff *skb; - - if ((mactx & XCT_MACTX_E) || - (*chan->status & PAS_STATUS_ERROR)) - pasemi_mac_tx_error(mac, mactx); - - /* Skip over control descriptors */ - if (!(mactx & XCT_MACTX_LLEN_M)) { - TX_DESC(txring, i) = 0; - TX_DESC(txring, i+1) = 0; - buf_count = 2; - continue; - } - - skb = TX_DESC_INFO(txring, i+1).skb; - nr_frags = TX_DESC_INFO(txring, i).dma; - - if (unlikely(mactx & XCT_MACTX_O)) - /* Not yet transmitted */ - break; - - buf_count = 2 + nr_frags; - /* Since we always fill with an even number of entries, make - * sure we skip any unused one at the end as well. - */ - if (buf_count & 1) - buf_count++; - - for (j = 0; j <= nr_frags; j++) - dmas[descr_count][j] = TX_DESC_INFO(txring, i+1+j).dma; - - skbs[descr_count] = skb; - nf[descr_count] = nr_frags; - - TX_DESC(txring, i) = 0; - TX_DESC(txring, i+1) = 0; - - descr_count++; - } - txring->next_to_clean = i & (TX_RING_SIZE-1); - - spin_unlock_irqrestore(&txring->lock, flags); - netif_wake_queue(mac->netdev); - - for (i = 0; i < descr_count; i++) - pasemi_mac_unmap_tx_skb(mac, nf[i], skbs[i], dmas[i]); - - total_count += descr_count; - - /* If the batch was full, try to clean more */ - if (descr_count == batch_limit) - goto restart; - - return total_count; -} - - -static irqreturn_t pasemi_mac_rx_intr(int irq, void *data) -{ - const struct pasemi_mac_rxring *rxring = data; - struct pasemi_mac *mac = rxring->mac; - const struct pasemi_dmachan *chan = &rxring->chan; - unsigned int reg; - - if (!(*chan->status & PAS_STATUS_CAUSE_M)) - return IRQ_NONE; - - /* Don't reset packet count so it won't fire again but clear - * all others. - */ - - reg = 0; - if (*chan->status & PAS_STATUS_SOFT) - reg |= PAS_IOB_DMA_RXCH_RESET_SINTC; - if (*chan->status & PAS_STATUS_ERROR) - reg |= PAS_IOB_DMA_RXCH_RESET_DINTC; - - napi_schedule(&mac->napi); - - write_iob_reg(PAS_IOB_DMA_RXCH_RESET(chan->chno), reg); - - return IRQ_HANDLED; -} - -#define TX_CLEAN_INTERVAL HZ - -static void pasemi_mac_tx_timer(unsigned long data) -{ - struct pasemi_mac_txring *txring = (struct pasemi_mac_txring *)data; - struct pasemi_mac *mac = txring->mac; - - pasemi_mac_clean_tx(txring); - - mod_timer(&txring->clean_timer, jiffies + TX_CLEAN_INTERVAL); - - pasemi_mac_restart_tx_intr(mac); -} - -static irqreturn_t pasemi_mac_tx_intr(int irq, void *data) -{ - struct pasemi_mac_txring *txring = data; - const struct pasemi_dmachan *chan = &txring->chan; - struct pasemi_mac *mac = txring->mac; - unsigned int reg; - - if (!(*chan->status & PAS_STATUS_CAUSE_M)) - return IRQ_NONE; - - reg = 0; - - if (*chan->status & PAS_STATUS_SOFT) - reg |= PAS_IOB_DMA_TXCH_RESET_SINTC; - if (*chan->status & PAS_STATUS_ERROR) - reg |= PAS_IOB_DMA_TXCH_RESET_DINTC; - - mod_timer(&txring->clean_timer, jiffies + (TX_CLEAN_INTERVAL)*2); - - napi_schedule(&mac->napi); - - if (reg) - write_iob_reg(PAS_IOB_DMA_TXCH_RESET(chan->chno), reg); - - return IRQ_HANDLED; -} - -static void pasemi_adjust_link(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - int msg; - unsigned int flags; - unsigned int new_flags; - - if (!mac->phydev->link) { - /* If no link, MAC speed settings don't matter. Just report - * link down and return. - */ - if (mac->link && netif_msg_link(mac)) - printk(KERN_INFO "%s: Link is down.\n", dev->name); - - netif_carrier_off(dev); - pasemi_mac_intf_disable(mac); - mac->link = 0; - - return; - } else { - pasemi_mac_intf_enable(mac); - netif_carrier_on(dev); - } - - flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG); - new_flags = flags & ~(PAS_MAC_CFG_PCFG_HD | PAS_MAC_CFG_PCFG_SPD_M | - PAS_MAC_CFG_PCFG_TSR_M); - - if (!mac->phydev->duplex) - new_flags |= PAS_MAC_CFG_PCFG_HD; - - switch (mac->phydev->speed) { - case 1000: - new_flags |= PAS_MAC_CFG_PCFG_SPD_1G | - PAS_MAC_CFG_PCFG_TSR_1G; - break; - case 100: - new_flags |= PAS_MAC_CFG_PCFG_SPD_100M | - PAS_MAC_CFG_PCFG_TSR_100M; - break; - case 10: - new_flags |= PAS_MAC_CFG_PCFG_SPD_10M | - PAS_MAC_CFG_PCFG_TSR_10M; - break; - default: - printk("Unsupported speed %d\n", mac->phydev->speed); - } - - /* Print on link or speed/duplex change */ - msg = mac->link != mac->phydev->link || flags != new_flags; - - mac->duplex = mac->phydev->duplex; - mac->speed = mac->phydev->speed; - mac->link = mac->phydev->link; - - if (new_flags != flags) - write_mac_reg(mac, PAS_MAC_CFG_PCFG, new_flags); - - if (msg && netif_msg_link(mac)) - printk(KERN_INFO "%s: Link is up at %d Mbps, %s duplex.\n", - dev->name, mac->speed, mac->duplex ? "full" : "half"); -} - -static int pasemi_mac_phy_init(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - struct device_node *dn, *phy_dn; - struct phy_device *phydev; - - dn = pci_device_to_OF_node(mac->pdev); - phy_dn = of_parse_phandle(dn, "phy-handle", 0); - of_node_put(phy_dn); - - mac->link = 0; - mac->speed = 0; - mac->duplex = -1; - - phydev = of_phy_connect(dev, phy_dn, &pasemi_adjust_link, 0, - PHY_INTERFACE_MODE_SGMII); - - if (IS_ERR(phydev)) { - printk(KERN_ERR "%s: Could not attach to phy\n", dev->name); - return PTR_ERR(phydev); - } - - mac->phydev = phydev; - - return 0; -} - - -static int pasemi_mac_open(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int flags; - int i, ret; - - flags = PAS_MAC_CFG_TXP_FCE | PAS_MAC_CFG_TXP_FPC(3) | - PAS_MAC_CFG_TXP_SL(3) | PAS_MAC_CFG_TXP_COB(0xf) | - PAS_MAC_CFG_TXP_TIFT(8) | PAS_MAC_CFG_TXP_TIFG(12); - - write_mac_reg(mac, PAS_MAC_CFG_TXP, flags); - - ret = pasemi_mac_setup_rx_resources(dev); - if (ret) - goto out_rx_resources; - - mac->tx = pasemi_mac_setup_tx_resources(dev); - - if (!mac->tx) - goto out_tx_ring; - - /* We might already have allocated rings in case mtu was changed - * before interface was brought up. - */ - if (dev->mtu > 1500 && !mac->num_cs) { - pasemi_mac_setup_csrings(mac); - if (!mac->num_cs) - goto out_tx_ring; - } - - /* Zero out rmon counters */ - for (i = 0; i < 32; i++) - write_mac_reg(mac, PAS_MAC_RMON(i), 0); - - /* 0x3ff with 33MHz clock is about 31us */ - write_iob_reg(PAS_IOB_DMA_COM_TIMEOUTCFG, - PAS_IOB_DMA_COM_TIMEOUTCFG_TCNT(0x3ff)); - - write_iob_reg(PAS_IOB_DMA_RXCH_CFG(mac->rx->chan.chno), - PAS_IOB_DMA_RXCH_CFG_CNTTH(256)); - - write_iob_reg(PAS_IOB_DMA_TXCH_CFG(mac->tx->chan.chno), - PAS_IOB_DMA_TXCH_CFG_CNTTH(32)); - - write_mac_reg(mac, PAS_MAC_IPC_CHNL, - PAS_MAC_IPC_CHNL_DCHNO(mac->rx->chan.chno) | - PAS_MAC_IPC_CHNL_BCH(mac->rx->chan.chno)); - - /* enable rx if */ - write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), - PAS_DMA_RXINT_RCMDSTA_EN | - PAS_DMA_RXINT_RCMDSTA_DROPS_M | - PAS_DMA_RXINT_RCMDSTA_BP | - PAS_DMA_RXINT_RCMDSTA_OO | - PAS_DMA_RXINT_RCMDSTA_BT); - - /* enable rx channel */ - pasemi_dma_start_chan(&rx_ring(mac)->chan, PAS_DMA_RXCHAN_CCMDSTA_DU | - PAS_DMA_RXCHAN_CCMDSTA_OD | - PAS_DMA_RXCHAN_CCMDSTA_FD | - PAS_DMA_RXCHAN_CCMDSTA_DT); - - /* enable tx channel */ - pasemi_dma_start_chan(&tx_ring(mac)->chan, PAS_DMA_TXCHAN_TCMDSTA_SZ | - PAS_DMA_TXCHAN_TCMDSTA_DB | - PAS_DMA_TXCHAN_TCMDSTA_DE | - PAS_DMA_TXCHAN_TCMDSTA_DA); - - pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE); - - write_dma_reg(PAS_DMA_RXCHAN_INCR(rx_ring(mac)->chan.chno), - RX_RING_SIZE>>1); - - /* Clear out any residual packet count state from firmware */ - pasemi_mac_restart_rx_intr(mac); - pasemi_mac_restart_tx_intr(mac); - - flags = PAS_MAC_CFG_PCFG_S1 | PAS_MAC_CFG_PCFG_PR | PAS_MAC_CFG_PCFG_CE; - - if (mac->type == MAC_TYPE_GMAC) - flags |= PAS_MAC_CFG_PCFG_TSR_1G | PAS_MAC_CFG_PCFG_SPD_1G; - else - flags |= PAS_MAC_CFG_PCFG_TSR_10G | PAS_MAC_CFG_PCFG_SPD_10G; - - /* Enable interface in MAC */ - write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags); - - ret = pasemi_mac_phy_init(dev); - if (ret) { - /* Since we won't get link notification, just enable RX */ - pasemi_mac_intf_enable(mac); - if (mac->type == MAC_TYPE_GMAC) { - /* Warn for missing PHY on SGMII (1Gig) ports */ - dev_warn(&mac->pdev->dev, - "PHY init failed: %d.\n", ret); - dev_warn(&mac->pdev->dev, - "Defaulting to 1Gbit full duplex\n"); - } - } - - netif_start_queue(dev); - napi_enable(&mac->napi); - - snprintf(mac->tx_irq_name, sizeof(mac->tx_irq_name), "%s tx", - dev->name); - - ret = request_irq(mac->tx->chan.irq, pasemi_mac_tx_intr, IRQF_DISABLED, - mac->tx_irq_name, mac->tx); - if (ret) { - dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n", - mac->tx->chan.irq, ret); - goto out_tx_int; - } - - snprintf(mac->rx_irq_name, sizeof(mac->rx_irq_name), "%s rx", - dev->name); - - ret = request_irq(mac->rx->chan.irq, pasemi_mac_rx_intr, IRQF_DISABLED, - mac->rx_irq_name, mac->rx); - if (ret) { - dev_err(&mac->pdev->dev, "request_irq of irq %d failed: %d\n", - mac->rx->chan.irq, ret); - goto out_rx_int; - } - - if (mac->phydev) - phy_start(mac->phydev); - - init_timer(&mac->tx->clean_timer); - mac->tx->clean_timer.function = pasemi_mac_tx_timer; - mac->tx->clean_timer.data = (unsigned long)mac->tx; - mac->tx->clean_timer.expires = jiffies+HZ; - add_timer(&mac->tx->clean_timer); - - return 0; - -out_rx_int: - free_irq(mac->tx->chan.irq, mac->tx); -out_tx_int: - napi_disable(&mac->napi); - netif_stop_queue(dev); -out_tx_ring: - if (mac->tx) - pasemi_mac_free_tx_resources(mac); - pasemi_mac_free_rx_resources(mac); -out_rx_resources: - - return ret; -} - -#define MAX_RETRIES 5000 - -static void pasemi_mac_pause_txchan(struct pasemi_mac *mac) -{ - unsigned int sta, retries; - int txch = tx_ring(mac)->chan.chno; - - write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), - PAS_DMA_TXCHAN_TCMDSTA_ST); - - for (retries = 0; retries < MAX_RETRIES; retries++) { - sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch)); - if (!(sta & PAS_DMA_TXCHAN_TCMDSTA_ACT)) - break; - cond_resched(); - } - - if (sta & PAS_DMA_TXCHAN_TCMDSTA_ACT) - dev_err(&mac->dma_pdev->dev, - "Failed to stop tx channel, tcmdsta %08x\n", sta); - - write_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch), 0); -} - -static void pasemi_mac_pause_rxchan(struct pasemi_mac *mac) -{ - unsigned int sta, retries; - int rxch = rx_ring(mac)->chan.chno; - - write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), - PAS_DMA_RXCHAN_CCMDSTA_ST); - for (retries = 0; retries < MAX_RETRIES; retries++) { - sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch)); - if (!(sta & PAS_DMA_RXCHAN_CCMDSTA_ACT)) - break; - cond_resched(); - } - - if (sta & PAS_DMA_RXCHAN_CCMDSTA_ACT) - dev_err(&mac->dma_pdev->dev, - "Failed to stop rx channel, ccmdsta 08%x\n", sta); - write_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch), 0); -} - -static void pasemi_mac_pause_rxint(struct pasemi_mac *mac) -{ - unsigned int sta, retries; - - write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), - PAS_DMA_RXINT_RCMDSTA_ST); - for (retries = 0; retries < MAX_RETRIES; retries++) { - sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); - if (!(sta & PAS_DMA_RXINT_RCMDSTA_ACT)) - break; - cond_resched(); - } - - if (sta & PAS_DMA_RXINT_RCMDSTA_ACT) - dev_err(&mac->dma_pdev->dev, - "Failed to stop rx interface, rcmdsta %08x\n", sta); - write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), 0); -} - -static int pasemi_mac_close(struct net_device *dev) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int sta; - int rxch, txch, i; - - rxch = rx_ring(mac)->chan.chno; - txch = tx_ring(mac)->chan.chno; - - if (mac->phydev) { - phy_stop(mac->phydev); - phy_disconnect(mac->phydev); - } - - del_timer_sync(&mac->tx->clean_timer); - - netif_stop_queue(dev); - napi_disable(&mac->napi); - - sta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); - if (sta & (PAS_DMA_RXINT_RCMDSTA_BP | - PAS_DMA_RXINT_RCMDSTA_OO | - PAS_DMA_RXINT_RCMDSTA_BT)) - printk(KERN_DEBUG "pasemi_mac: rcmdsta error: 0x%08x\n", sta); - - sta = read_dma_reg(PAS_DMA_RXCHAN_CCMDSTA(rxch)); - if (sta & (PAS_DMA_RXCHAN_CCMDSTA_DU | - PAS_DMA_RXCHAN_CCMDSTA_OD | - PAS_DMA_RXCHAN_CCMDSTA_FD | - PAS_DMA_RXCHAN_CCMDSTA_DT)) - printk(KERN_DEBUG "pasemi_mac: ccmdsta error: 0x%08x\n", sta); - - sta = read_dma_reg(PAS_DMA_TXCHAN_TCMDSTA(txch)); - if (sta & (PAS_DMA_TXCHAN_TCMDSTA_SZ | PAS_DMA_TXCHAN_TCMDSTA_DB | - PAS_DMA_TXCHAN_TCMDSTA_DE | PAS_DMA_TXCHAN_TCMDSTA_DA)) - printk(KERN_DEBUG "pasemi_mac: tcmdsta error: 0x%08x\n", sta); - - /* Clean out any pending buffers */ - pasemi_mac_clean_tx(tx_ring(mac)); - pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE); - - pasemi_mac_pause_txchan(mac); - pasemi_mac_pause_rxint(mac); - pasemi_mac_pause_rxchan(mac); - pasemi_mac_intf_disable(mac); - - free_irq(mac->tx->chan.irq, mac->tx); - free_irq(mac->rx->chan.irq, mac->rx); - - for (i = 0; i < mac->num_cs; i++) { - pasemi_mac_free_csring(mac->cs[i]); - mac->cs[i] = NULL; - } - - mac->num_cs = 0; - - /* Free resources */ - pasemi_mac_free_rx_resources(mac); - pasemi_mac_free_tx_resources(mac); - - return 0; -} - -static void pasemi_mac_queue_csdesc(const struct sk_buff *skb, - const dma_addr_t *map, - const unsigned int *map_size, - struct pasemi_mac_txring *txring, - struct pasemi_mac_csring *csring) -{ - u64 fund; - dma_addr_t cs_dest; - const int nh_off = skb_network_offset(skb); - const int nh_len = skb_network_header_len(skb); - const int nfrags = skb_shinfo(skb)->nr_frags; - int cs_size, i, fill, hdr, cpyhdr, evt; - dma_addr_t csdma; - - fund = XCT_FUN_ST | XCT_FUN_RR_8BRES | - XCT_FUN_O | XCT_FUN_FUN(csring->fun) | - XCT_FUN_CRM_SIG | XCT_FUN_LLEN(skb->len - nh_off) | - XCT_FUN_SHL(nh_len >> 2) | XCT_FUN_SE; - - switch (ip_hdr(skb)->protocol) { - case IPPROTO_TCP: - fund |= XCT_FUN_SIG_TCP4; - /* TCP checksum is 16 bytes into the header */ - cs_dest = map[0] + skb_transport_offset(skb) + 16; - break; - case IPPROTO_UDP: - fund |= XCT_FUN_SIG_UDP4; - /* UDP checksum is 6 bytes into the header */ - cs_dest = map[0] + skb_transport_offset(skb) + 6; - break; - default: - BUG(); - } - - /* Do the checksum offloaded */ - fill = csring->next_to_fill; - hdr = fill; - - CS_DESC(csring, fill++) = fund; - /* Room for 8BRES. Checksum result is really 2 bytes into it */ - csdma = csring->chan.ring_dma + (fill & (CS_RING_SIZE-1)) * 8 + 2; - CS_DESC(csring, fill++) = 0; - - CS_DESC(csring, fill) = XCT_PTR_LEN(map_size[0]-nh_off) | XCT_PTR_ADDR(map[0]+nh_off); - for (i = 1; i <= nfrags; i++) - CS_DESC(csring, fill+i) = XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]); - - fill += i; - if (fill & 1) - fill++; - - /* Copy the result into the TCP packet */ - cpyhdr = fill; - CS_DESC(csring, fill++) = XCT_FUN_O | XCT_FUN_FUN(csring->fun) | - XCT_FUN_LLEN(2) | XCT_FUN_SE; - CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(cs_dest) | XCT_PTR_T; - CS_DESC(csring, fill++) = XCT_PTR_LEN(2) | XCT_PTR_ADDR(csdma); - fill++; - - evt = !csring->last_event; - csring->last_event = evt; - - /* Event handshaking with MAC TX */ - CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O | - CTRL_CMD_ETYPE_SET | CTRL_CMD_REG(csring->events[evt]); - CS_DESC(csring, fill++) = 0; - CS_DESC(csring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O | - CTRL_CMD_ETYPE_WCLR | CTRL_CMD_REG(csring->events[!evt]); - CS_DESC(csring, fill++) = 0; - csring->next_to_fill = fill & (CS_RING_SIZE-1); - - cs_size = fill - hdr; - write_dma_reg(PAS_DMA_TXCHAN_INCR(csring->chan.chno), (cs_size) >> 1); - - /* TX-side event handshaking */ - fill = txring->next_to_fill; - TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O | - CTRL_CMD_ETYPE_WSET | CTRL_CMD_REG(csring->events[evt]); - TX_DESC(txring, fill++) = 0; - TX_DESC(txring, fill++) = CTRL_CMD_T | CTRL_CMD_META_EVT | CTRL_CMD_O | - CTRL_CMD_ETYPE_CLR | CTRL_CMD_REG(csring->events[!evt]); - TX_DESC(txring, fill++) = 0; - txring->next_to_fill = fill; - - write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), 2); -} - -static int pasemi_mac_start_tx(struct sk_buff *skb, struct net_device *dev) -{ - struct pasemi_mac * const mac = netdev_priv(dev); - struct pasemi_mac_txring * const txring = tx_ring(mac); - struct pasemi_mac_csring *csring; - u64 dflags = 0; - u64 mactx; - dma_addr_t map[MAX_SKB_FRAGS+1]; - unsigned int map_size[MAX_SKB_FRAGS+1]; - unsigned long flags; - int i, nfrags; - int fill; - const int nh_off = skb_network_offset(skb); - const int nh_len = skb_network_header_len(skb); - - prefetch(&txring->ring_info); - - dflags = XCT_MACTX_O | XCT_MACTX_ST | XCT_MACTX_CRC_PAD; - - nfrags = skb_shinfo(skb)->nr_frags; - - map[0] = pci_map_single(mac->dma_pdev, skb->data, skb_headlen(skb), - PCI_DMA_TODEVICE); - map_size[0] = skb_headlen(skb); - if (pci_dma_mapping_error(mac->dma_pdev, map[0])) - goto out_err_nolock; - - for (i = 0; i < nfrags; i++) { - skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; - - map[i+1] = pci_map_page(mac->dma_pdev, frag->page, - frag->page_offset, frag->size, - PCI_DMA_TODEVICE); - map_size[i+1] = frag->size; - if (pci_dma_mapping_error(mac->dma_pdev, map[i+1])) { - nfrags = i; - goto out_err_nolock; - } - } - - if (skb->ip_summed == CHECKSUM_PARTIAL && skb->len <= 1540) { - switch (ip_hdr(skb)->protocol) { - case IPPROTO_TCP: - dflags |= XCT_MACTX_CSUM_TCP; - dflags |= XCT_MACTX_IPH(nh_len >> 2); - dflags |= XCT_MACTX_IPO(nh_off); - break; - case IPPROTO_UDP: - dflags |= XCT_MACTX_CSUM_UDP; - dflags |= XCT_MACTX_IPH(nh_len >> 2); - dflags |= XCT_MACTX_IPO(nh_off); - break; - default: - WARN_ON(1); - } - } - - mactx = dflags | XCT_MACTX_LLEN(skb->len); - - spin_lock_irqsave(&txring->lock, flags); - - /* Avoid stepping on the same cache line that the DMA controller - * is currently about to send, so leave at least 8 words available. - * Total free space needed is mactx + fragments + 8 - */ - if (RING_AVAIL(txring) < nfrags + 14) { - /* no room -- stop the queue and wait for tx intr */ - netif_stop_queue(dev); - goto out_err; - } - - /* Queue up checksum + event descriptors, if needed */ - if (mac->num_cs && skb->ip_summed == CHECKSUM_PARTIAL && skb->len > 1540) { - csring = mac->cs[mac->last_cs]; - mac->last_cs = (mac->last_cs + 1) % mac->num_cs; - - pasemi_mac_queue_csdesc(skb, map, map_size, txring, csring); - } - - fill = txring->next_to_fill; - TX_DESC(txring, fill) = mactx; - TX_DESC_INFO(txring, fill).dma = nfrags; - fill++; - TX_DESC_INFO(txring, fill).skb = skb; - for (i = 0; i <= nfrags; i++) { - TX_DESC(txring, fill+i) = - XCT_PTR_LEN(map_size[i]) | XCT_PTR_ADDR(map[i]); - TX_DESC_INFO(txring, fill+i).dma = map[i]; - } - - /* We have to add an even number of 8-byte entries to the ring - * even if the last one is unused. That means always an odd number - * of pointers + one mactx descriptor. - */ - if (nfrags & 1) - nfrags++; - - txring->next_to_fill = (fill + nfrags + 1) & (TX_RING_SIZE-1); - - dev->stats.tx_packets++; - dev->stats.tx_bytes += skb->len; - - spin_unlock_irqrestore(&txring->lock, flags); - - write_dma_reg(PAS_DMA_TXCHAN_INCR(txring->chan.chno), (nfrags+2) >> 1); - - return NETDEV_TX_OK; - -out_err: - spin_unlock_irqrestore(&txring->lock, flags); -out_err_nolock: - while (nfrags--) - pci_unmap_single(mac->dma_pdev, map[nfrags], map_size[nfrags], - PCI_DMA_TODEVICE); - - return NETDEV_TX_BUSY; -} - -static void pasemi_mac_set_rx_mode(struct net_device *dev) -{ - const struct pasemi_mac *mac = netdev_priv(dev); - unsigned int flags; - - flags = read_mac_reg(mac, PAS_MAC_CFG_PCFG); - - /* Set promiscuous */ - if (dev->flags & IFF_PROMISC) - flags |= PAS_MAC_CFG_PCFG_PR; - else - flags &= ~PAS_MAC_CFG_PCFG_PR; - - write_mac_reg(mac, PAS_MAC_CFG_PCFG, flags); -} - - -static int pasemi_mac_poll(struct napi_struct *napi, int budget) -{ - struct pasemi_mac *mac = container_of(napi, struct pasemi_mac, napi); - int pkts; - - pasemi_mac_clean_tx(tx_ring(mac)); - pkts = pasemi_mac_clean_rx(rx_ring(mac), budget); - if (pkts < budget) { - /* all done, no more packets present */ - napi_complete(napi); - - pasemi_mac_restart_rx_intr(mac); - pasemi_mac_restart_tx_intr(mac); - } - return pkts; -} - -#ifdef CONFIG_NET_POLL_CONTROLLER -/* - * Polling 'interrupt' - used by things like netconsole to send skbs - * without having to re-enable interrupts. It's not called while - * the interrupt routine is executing. - */ -static void pasemi_mac_netpoll(struct net_device *dev) -{ - const struct pasemi_mac *mac = netdev_priv(dev); - - disable_irq(mac->tx->chan.irq); - pasemi_mac_tx_intr(mac->tx->chan.irq, mac->tx); - enable_irq(mac->tx->chan.irq); - - disable_irq(mac->rx->chan.irq); - pasemi_mac_rx_intr(mac->rx->chan.irq, mac->rx); - enable_irq(mac->rx->chan.irq); -} -#endif - -static int pasemi_mac_change_mtu(struct net_device *dev, int new_mtu) -{ - struct pasemi_mac *mac = netdev_priv(dev); - unsigned int reg; - unsigned int rcmdsta = 0; - int running; - int ret = 0; - - if (new_mtu < PE_MIN_MTU || new_mtu > PE_MAX_MTU) - return -EINVAL; - - running = netif_running(dev); - - if (running) { - /* Need to stop the interface, clean out all already - * received buffers, free all unused buffers on the RX - * interface ring, then finally re-fill the rx ring with - * the new-size buffers and restart. - */ - - napi_disable(&mac->napi); - netif_tx_disable(dev); - pasemi_mac_intf_disable(mac); - - rcmdsta = read_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if)); - pasemi_mac_pause_rxint(mac); - pasemi_mac_clean_rx(rx_ring(mac), RX_RING_SIZE); - pasemi_mac_free_rx_buffers(mac); - - } - - /* Setup checksum channels if large MTU and none already allocated */ - if (new_mtu > 1500 && !mac->num_cs) { - pasemi_mac_setup_csrings(mac); - if (!mac->num_cs) { - ret = -ENOMEM; - goto out; - } - } - - /* Change maxf, i.e. what size frames are accepted. - * Need room for ethernet header and CRC word - */ - reg = read_mac_reg(mac, PAS_MAC_CFG_MACCFG); - reg &= ~PAS_MAC_CFG_MACCFG_MAXF_M; - reg |= PAS_MAC_CFG_MACCFG_MAXF(new_mtu + ETH_HLEN + 4); - write_mac_reg(mac, PAS_MAC_CFG_MACCFG, reg); - - dev->mtu = new_mtu; - /* MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */ - mac->bufsz = new_mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128; - -out: - if (running) { - write_dma_reg(PAS_DMA_RXINT_RCMDSTA(mac->dma_if), - rcmdsta | PAS_DMA_RXINT_RCMDSTA_EN); - - rx_ring(mac)->next_to_fill = 0; - pasemi_mac_replenish_rx_ring(dev, RX_RING_SIZE-1); - - napi_enable(&mac->napi); - netif_start_queue(dev); - pasemi_mac_intf_enable(mac); - } - - return ret; -} - -static const struct net_device_ops pasemi_netdev_ops = { - .ndo_open = pasemi_mac_open, - .ndo_stop = pasemi_mac_close, - .ndo_start_xmit = pasemi_mac_start_tx, - .ndo_set_multicast_list = pasemi_mac_set_rx_mode, - .ndo_set_mac_address = pasemi_mac_set_mac_addr, - .ndo_change_mtu = pasemi_mac_change_mtu, - .ndo_validate_addr = eth_validate_addr, -#ifdef CONFIG_NET_POLL_CONTROLLER - .ndo_poll_controller = pasemi_mac_netpoll, -#endif -}; - -static int __devinit -pasemi_mac_probe(struct pci_dev *pdev, const struct pci_device_id *ent) -{ - struct net_device *dev; - struct pasemi_mac *mac; - int err, ret; - - err = pci_enable_device(pdev); - if (err) - return err; - - dev = alloc_etherdev(sizeof(struct pasemi_mac)); - if (dev == NULL) { - dev_err(&pdev->dev, - "pasemi_mac: Could not allocate ethernet device.\n"); - err = -ENOMEM; - goto out_disable_device; - } - - pci_set_drvdata(pdev, dev); - SET_NETDEV_DEV(dev, &pdev->dev); - - mac = netdev_priv(dev); - - mac->pdev = pdev; - mac->netdev = dev; - - netif_napi_add(dev, &mac->napi, pasemi_mac_poll, 64); - - dev->features = NETIF_F_IP_CSUM | NETIF_F_LLTX | NETIF_F_SG | - NETIF_F_HIGHDMA | NETIF_F_GSO; - - mac->lro_mgr.max_aggr = LRO_MAX_AGGR; - mac->lro_mgr.max_desc = MAX_LRO_DESCRIPTORS; - mac->lro_mgr.lro_arr = mac->lro_desc; - mac->lro_mgr.get_skb_header = get_skb_hdr; - mac->lro_mgr.features = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID; - mac->lro_mgr.dev = mac->netdev; - mac->lro_mgr.ip_summed = CHECKSUM_UNNECESSARY; - mac->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY; - - - mac->dma_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa007, NULL); - if (!mac->dma_pdev) { - dev_err(&mac->pdev->dev, "Can't find DMA Controller\n"); - err = -ENODEV; - goto out; - } - - mac->iob_pdev = pci_get_device(PCI_VENDOR_ID_PASEMI, 0xa001, NULL); - if (!mac->iob_pdev) { - dev_err(&mac->pdev->dev, "Can't find I/O Bridge\n"); - err = -ENODEV; - goto out; - } - - /* get mac addr from device tree */ - if (pasemi_get_mac_addr(mac) || !is_valid_ether_addr(mac->mac_addr)) { - err = -ENODEV; - goto out; - } - memcpy(dev->dev_addr, mac->mac_addr, sizeof(mac->mac_addr)); - - ret = mac_to_intf(mac); - if (ret < 0) { - dev_err(&mac->pdev->dev, "Can't map DMA interface\n"); - err = -ENODEV; - goto out; - } - mac->dma_if = ret; - - switch (pdev->device) { - case 0xa005: - mac->type = MAC_TYPE_GMAC; - break; - case 0xa006: - mac->type = MAC_TYPE_XAUI; - break; - default: - err = -ENODEV; - goto out; - } - - dev->netdev_ops = &pasemi_netdev_ops; - dev->mtu = PE_DEF_MTU; - /* 1500 MTU + ETH_HLEN + VLAN_HLEN + 2 64B cachelines */ - mac->bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + LOCAL_SKB_ALIGN + 128; - - dev->ethtool_ops = &pasemi_mac_ethtool_ops; - - if (err) - goto out; - - mac->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE); - - /* Enable most messages by default */ - mac->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1; - - err = register_netdev(dev); - - if (err) { - dev_err(&mac->pdev->dev, "register_netdev failed with error %d\n", - err); - goto out; - } else if netif_msg_probe(mac) - printk(KERN_INFO "%s: PA Semi %s: intf %d, hw addr %pM\n", - dev->name, mac->type == MAC_TYPE_GMAC ? "GMAC" : "XAUI", - mac->dma_if, dev->dev_addr); - - return err; - -out: - if (mac->iob_pdev) - pci_dev_put(mac->iob_pdev); - if (mac->dma_pdev) - pci_dev_put(mac->dma_pdev); - - free_netdev(dev); -out_disable_device: - pci_disable_device(pdev); - return err; - -} - -static void __devexit pasemi_mac_remove(struct pci_dev *pdev) -{ - struct net_device *netdev = pci_get_drvdata(pdev); - struct pasemi_mac *mac; - - if (!netdev) - return; - - mac = netdev_priv(netdev); - - unregister_netdev(netdev); - - pci_disable_device(pdev); - pci_dev_put(mac->dma_pdev); - pci_dev_put(mac->iob_pdev); - - pasemi_dma_free_chan(&mac->tx->chan); - pasemi_dma_free_chan(&mac->rx->chan); - - pci_set_drvdata(pdev, NULL); - free_netdev(netdev); -} - -static DEFINE_PCI_DEVICE_TABLE(pasemi_mac_pci_tbl) = { - { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa005) }, - { PCI_DEVICE(PCI_VENDOR_ID_PASEMI, 0xa006) }, - { }, -}; - -MODULE_DEVICE_TABLE(pci, pasemi_mac_pci_tbl); - -static struct pci_driver pasemi_mac_driver = { - .name = "pasemi_mac", - .id_table = pasemi_mac_pci_tbl, - .probe = pasemi_mac_probe, - .remove = __devexit_p(pasemi_mac_remove), -}; - -static void __exit pasemi_mac_cleanup_module(void) -{ - pci_unregister_driver(&pasemi_mac_driver); -} - -int pasemi_mac_init_module(void) -{ - int err; - - err = pasemi_dma_init(); - if (err) - return err; - - return pci_register_driver(&pasemi_mac_driver); -} - -module_init(pasemi_mac_init_module); -module_exit(pasemi_mac_cleanup_module); |