--- /dev/null
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 2009 Cavium Networks
+ */
+
+#include <linux/capability.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/if_vlan.h>
+#include <linux/phy.h>
+#include <linux/spinlock.h>
+
+#include <asm/octeon/octeon.h>
+#include <asm/octeon/cvmx-mixx-defs.h>
+#include <asm/octeon/cvmx-agl-defs.h>
+
+#define DRV_NAME "octeon_mgmt"
+#define DRV_VERSION "2.0"
+#define DRV_DESCRIPTION \
+ "Cavium Networks Octeon MII (management) port Network Driver"
+
+#define OCTEON_MGMT_NAPI_WEIGHT 16
+
+/*
+ * Ring sizes that are powers of two allow for more efficient modulo
+ * opertions.
+ */
+#define OCTEON_MGMT_RX_RING_SIZE 512
+#define OCTEON_MGMT_TX_RING_SIZE 128
+
+/* Allow 8 bytes for vlan and FCS. */
+#define OCTEON_MGMT_RX_HEADROOM (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN)
+
+union mgmt_port_ring_entry {
+ u64 d64;
+ struct {
+ u64 reserved_62_63:2;
+ /* Length of the buffer/packet in bytes */
+ u64 len:14;
+ /* For TX, signals that the packet should be timestamped */
+ u64 tstamp:1;
+ /* The RX error code */
+ u64 code:7;
+#define RING_ENTRY_CODE_DONE 0xf
+#define RING_ENTRY_CODE_MORE 0x10
+ /* Physical address of the buffer */
+ u64 addr:40;
+ } s;
+};
+
+struct octeon_mgmt {
+ struct net_device *netdev;
+ int port;
+ int irq;
+ u64 *tx_ring;
+ dma_addr_t tx_ring_handle;
+ unsigned int tx_next;
+ unsigned int tx_next_clean;
+ unsigned int tx_current_fill;
+ /* The tx_list lock also protects the ring related variables */
+ struct sk_buff_head tx_list;
+
+ /* RX variables only touched in napi_poll. No locking necessary. */
+ u64 *rx_ring;
+ dma_addr_t rx_ring_handle;
+ unsigned int rx_next;
+ unsigned int rx_next_fill;
+ unsigned int rx_current_fill;
+ struct sk_buff_head rx_list;
+
+ spinlock_t lock;
+ unsigned int last_duplex;
+ unsigned int last_link;
+ struct device *dev;
+ struct napi_struct napi;
+ struct tasklet_struct tx_clean_tasklet;
+ struct phy_device *phydev;
+};
+
+static void octeon_mgmt_set_rx_irq(struct octeon_mgmt *p, int enable)
+{
+ int port = p->port;
+ union cvmx_mixx_intena mix_intena;
+ unsigned long flags;
+
+ spin_lock_irqsave(&p->lock, flags);
+ mix_intena.u64 = cvmx_read_csr(CVMX_MIXX_INTENA(port));
+ mix_intena.s.ithena = enable ? 1 : 0;
+ cvmx_write_csr(CVMX_MIXX_INTENA(port), mix_intena.u64);
+ spin_unlock_irqrestore(&p->lock, flags);
+}
+
+static void octeon_mgmt_set_tx_irq(struct octeon_mgmt *p, int enable)
+{
+ int port = p->port;
+ union cvmx_mixx_intena mix_intena;
+ unsigned long flags;
+
+ spin_lock_irqsave(&p->lock, flags);
+ mix_intena.u64 = cvmx_read_csr(CVMX_MIXX_INTENA(port));
+ mix_intena.s.othena = enable ? 1 : 0;
+ cvmx_write_csr(CVMX_MIXX_INTENA(port), mix_intena.u64);
+ spin_unlock_irqrestore(&p->lock, flags);
+}
+
+static inline void octeon_mgmt_enable_rx_irq(struct octeon_mgmt *p)
+{
+ octeon_mgmt_set_rx_irq(p, 1);
+}
+
+static inline void octeon_mgmt_disable_rx_irq(struct octeon_mgmt *p)
+{
+ octeon_mgmt_set_rx_irq(p, 0);
+}
+
+static inline void octeon_mgmt_enable_tx_irq(struct octeon_mgmt *p)
+{
+ octeon_mgmt_set_tx_irq(p, 1);
+}
+
+static inline void octeon_mgmt_disable_tx_irq(struct octeon_mgmt *p)
+{
+ octeon_mgmt_set_tx_irq(p, 0);
+}
+
+static unsigned int ring_max_fill(unsigned int ring_size)
+{
+ return ring_size - 8;
+}
+
+static unsigned int ring_size_to_bytes(unsigned int ring_size)
+{
+ return ring_size * sizeof(union mgmt_port_ring_entry);
+}
+
+static void octeon_mgmt_rx_fill_ring(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+
+ while (p->rx_current_fill < ring_max_fill(OCTEON_MGMT_RX_RING_SIZE)) {
+ unsigned int size;
+ union mgmt_port_ring_entry re;
+ struct sk_buff *skb;
+
+ /* CN56XX pass 1 needs 8 bytes of padding. */
+ size = netdev->mtu + OCTEON_MGMT_RX_HEADROOM + 8 + NET_IP_ALIGN;
+
+ skb = netdev_alloc_skb(netdev, size);
+ if (!skb)
+ break;
+ skb_reserve(skb, NET_IP_ALIGN);
+ __skb_queue_tail(&p->rx_list, skb);
+
+ re.d64 = 0;
+ re.s.len = size;
+ re.s.addr = dma_map_single(p->dev, skb->data,
+ size,
+ DMA_FROM_DEVICE);
+
+ /* Put it in the ring. */
+ p->rx_ring[p->rx_next_fill] = re.d64;
+ dma_sync_single_for_device(p->dev, p->rx_ring_handle,
+ ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+ p->rx_next_fill =
+ (p->rx_next_fill + 1) % OCTEON_MGMT_RX_RING_SIZE;
+ p->rx_current_fill++;
+ /* Ring the bell. */
+ cvmx_write_csr(CVMX_MIXX_IRING2(port), 1);
+ }
+}
+
+static void octeon_mgmt_clean_tx_buffers(struct octeon_mgmt *p)
+{
+ int port = p->port;
+ union cvmx_mixx_orcnt mix_orcnt;
+ union mgmt_port_ring_entry re;
+ struct sk_buff *skb;
+ int cleaned = 0;
+ unsigned long flags;
+
+ mix_orcnt.u64 = cvmx_read_csr(CVMX_MIXX_ORCNT(port));
+ while (mix_orcnt.s.orcnt) {
+ dma_sync_single_for_cpu(p->dev, p->tx_ring_handle,
+ ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+
+ spin_lock_irqsave(&p->tx_list.lock, flags);
+
+ re.d64 = p->tx_ring[p->tx_next_clean];
+ p->tx_next_clean =
+ (p->tx_next_clean + 1) % OCTEON_MGMT_TX_RING_SIZE;
+ skb = __skb_dequeue(&p->tx_list);
+
+ mix_orcnt.u64 = 0;
+ mix_orcnt.s.orcnt = 1;
+
+ /* Acknowledge to hardware that we have the buffer. */
+ cvmx_write_csr(CVMX_MIXX_ORCNT(port), mix_orcnt.u64);
+ p->tx_current_fill--;
+
+ spin_unlock_irqrestore(&p->tx_list.lock, flags);
+
+ dma_unmap_single(p->dev, re.s.addr, re.s.len,
+ DMA_TO_DEVICE);
+ dev_kfree_skb_any(skb);
+ cleaned++;
+
+ mix_orcnt.u64 = cvmx_read_csr(CVMX_MIXX_ORCNT(port));
+ }
+
+ if (cleaned && netif_queue_stopped(p->netdev))
+ netif_wake_queue(p->netdev);
+}
+
+static void octeon_mgmt_clean_tx_tasklet(unsigned long arg)
+{
+ struct octeon_mgmt *p = (struct octeon_mgmt *)arg;
+ octeon_mgmt_clean_tx_buffers(p);
+ octeon_mgmt_enable_tx_irq(p);
+}
+
+static void octeon_mgmt_update_rx_stats(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+ unsigned long flags;
+ u64 drop, bad;
+
+ /* These reads also clear the count registers. */
+ drop = cvmx_read_csr(CVMX_AGL_GMX_RXX_STATS_PKTS_DRP(port));
+ bad = cvmx_read_csr(CVMX_AGL_GMX_RXX_STATS_PKTS_BAD(port));
+
+ if (drop || bad) {
+ /* Do an atomic update. */
+ spin_lock_irqsave(&p->lock, flags);
+ netdev->stats.rx_errors += bad;
+ netdev->stats.rx_dropped += drop;
+ spin_unlock_irqrestore(&p->lock, flags);
+ }
+}
+
+static void octeon_mgmt_update_tx_stats(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+ unsigned long flags;
+
+ union cvmx_agl_gmx_txx_stat0 s0;
+ union cvmx_agl_gmx_txx_stat1 s1;
+
+ /* These reads also clear the count registers. */
+ s0.u64 = cvmx_read_csr(CVMX_AGL_GMX_TXX_STAT0(port));
+ s1.u64 = cvmx_read_csr(CVMX_AGL_GMX_TXX_STAT1(port));
+
+ if (s0.s.xsdef || s0.s.xscol || s1.s.scol || s1.s.mcol) {
+ /* Do an atomic update. */
+ spin_lock_irqsave(&p->lock, flags);
+ netdev->stats.tx_errors += s0.s.xsdef + s0.s.xscol;
+ netdev->stats.collisions += s1.s.scol + s1.s.mcol;
+ spin_unlock_irqrestore(&p->lock, flags);
+ }
+}
+
+/*
+ * Dequeue a receive skb and its corresponding ring entry. The ring
+ * entry is returned, *pskb is updated to point to the skb.
+ */
+static u64 octeon_mgmt_dequeue_rx_buffer(struct octeon_mgmt *p,
+ struct sk_buff **pskb)
+{
+ union mgmt_port_ring_entry re;
+
+ dma_sync_single_for_cpu(p->dev, p->rx_ring_handle,
+ ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+
+ re.d64 = p->rx_ring[p->rx_next];
+ p->rx_next = (p->rx_next + 1) % OCTEON_MGMT_RX_RING_SIZE;
+ p->rx_current_fill--;
+ *pskb = __skb_dequeue(&p->rx_list);
+
+ dma_unmap_single(p->dev, re.s.addr,
+ ETH_FRAME_LEN + OCTEON_MGMT_RX_HEADROOM,
+ DMA_FROM_DEVICE);
+
+ return re.d64;
+}
+
+
+static int octeon_mgmt_receive_one(struct octeon_mgmt *p)
+{
+ int port = p->port;
+ struct net_device *netdev = p->netdev;
+ union cvmx_mixx_ircnt mix_ircnt;
+ union mgmt_port_ring_entry re;
+ struct sk_buff *skb;
+ struct sk_buff *skb2;
+ struct sk_buff *skb_new;
+ union mgmt_port_ring_entry re2;
+ int rc = 1;
+
+
+ re.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb);
+ if (likely(re.s.code == RING_ENTRY_CODE_DONE)) {
+ /* A good packet, send it up. */
+ skb_put(skb, re.s.len);
+good:
+ skb->protocol = eth_type_trans(skb, netdev);
+ netdev->stats.rx_packets++;
+ netdev->stats.rx_bytes += skb->len;
+ netdev->last_rx = jiffies;
+ netif_receive_skb(skb);
+ rc = 0;
+ } else if (re.s.code == RING_ENTRY_CODE_MORE) {
+ /*
+ * Packet split across skbs. This can happen if we
+ * increase the MTU. Buffers that are already in the
+ * rx ring can then end up being too small. As the rx
+ * ring is refilled, buffers sized for the new MTU
+ * will be used and we should go back to the normal
+ * non-split case.
+ */
+ skb_put(skb, re.s.len);
+ do {
+ re2.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb2);
+ if (re2.s.code != RING_ENTRY_CODE_MORE
+ && re2.s.code != RING_ENTRY_CODE_DONE)
+ goto split_error;
+ skb_put(skb2, re2.s.len);
+ skb_new = skb_copy_expand(skb, 0, skb2->len,
+ GFP_ATOMIC);
+ if (!skb_new)
+ goto split_error;
+ if (skb_copy_bits(skb2, 0, skb_tail_pointer(skb_new),
+ skb2->len))
+ goto split_error;
+ skb_put(skb_new, skb2->len);
+ dev_kfree_skb_any(skb);
+ dev_kfree_skb_any(skb2);
+ skb = skb_new;
+ } while (re2.s.code == RING_ENTRY_CODE_MORE);
+ goto good;
+ } else {
+ /* Some other error, discard it. */
+ dev_kfree_skb_any(skb);
+ /*
+ * Error statistics are accumulated in
+ * octeon_mgmt_update_rx_stats.
+ */
+ }
+ goto done;
+split_error:
+ /* Discard the whole mess. */
+ dev_kfree_skb_any(skb);
+ dev_kfree_skb_any(skb2);
+ while (re2.s.code == RING_ENTRY_CODE_MORE) {
+ re2.d64 = octeon_mgmt_dequeue_rx_buffer(p, &skb2);
+ dev_kfree_skb_any(skb2);
+ }
+ netdev->stats.rx_errors++;
+
+done:
+ /* Tell the hardware we processed a packet. */
+ mix_ircnt.u64 = 0;
+ mix_ircnt.s.ircnt = 1;
+ cvmx_write_csr(CVMX_MIXX_IRCNT(port), mix_ircnt.u64);
+ return rc;
+
+}
+
+static int octeon_mgmt_receive_packets(struct octeon_mgmt *p, int budget)
+{
+ int port = p->port;
+ unsigned int work_done = 0;
+ union cvmx_mixx_ircnt mix_ircnt;
+ int rc;
+
+
+ mix_ircnt.u64 = cvmx_read_csr(CVMX_MIXX_IRCNT(port));
+ while (work_done < budget && mix_ircnt.s.ircnt) {
+
+ rc = octeon_mgmt_receive_one(p);
+ if (!rc)
+ work_done++;
+
+ /* Check for more packets. */
+ mix_ircnt.u64 = cvmx_read_csr(CVMX_MIXX_IRCNT(port));
+ }
+
+ octeon_mgmt_rx_fill_ring(p->netdev);
+
+ return work_done;
+}
+
+static int octeon_mgmt_napi_poll(struct napi_struct *napi, int budget)
+{
+ struct octeon_mgmt *p = container_of(napi, struct octeon_mgmt, napi);
+ struct net_device *netdev = p->netdev;
+ unsigned int work_done = 0;
+
+ work_done = octeon_mgmt_receive_packets(p, budget);
+
+ if (work_done < budget) {
+ /* We stopped because no more packets were available. */
+ napi_complete(napi);
+ octeon_mgmt_enable_rx_irq(p);
+ }
+ octeon_mgmt_update_rx_stats(netdev);
+
+ return work_done;
+}
+
+/* Reset the hardware to clean state. */
+static void octeon_mgmt_reset_hw(struct octeon_mgmt *p)
+{
+ union cvmx_mixx_ctl mix_ctl;
+ union cvmx_mixx_bist mix_bist;
+ union cvmx_agl_gmx_bist agl_gmx_bist;
+
+ mix_ctl.u64 = 0;
+ cvmx_write_csr(CVMX_MIXX_CTL(p->port), mix_ctl.u64);
+ do {
+ mix_ctl.u64 = cvmx_read_csr(CVMX_MIXX_CTL(p->port));
+ } while (mix_ctl.s.busy);
+ mix_ctl.s.reset = 1;
+ cvmx_write_csr(CVMX_MIXX_CTL(p->port), mix_ctl.u64);
+ cvmx_read_csr(CVMX_MIXX_CTL(p->port));
+ cvmx_wait(64);
+
+ mix_bist.u64 = cvmx_read_csr(CVMX_MIXX_BIST(p->port));
+ if (mix_bist.u64)
+ dev_warn(p->dev, "MIX failed BIST (0x%016llx)\n",
+ (unsigned long long)mix_bist.u64);
+
+ agl_gmx_bist.u64 = cvmx_read_csr(CVMX_AGL_GMX_BIST);
+ if (agl_gmx_bist.u64)
+ dev_warn(p->dev, "AGL failed BIST (0x%016llx)\n",
+ (unsigned long long)agl_gmx_bist.u64);
+}
+
+struct octeon_mgmt_cam_state {
+ u64 cam[6];
+ u64 cam_mask;
+ int cam_index;
+};
+
+static void octeon_mgmt_cam_state_add(struct octeon_mgmt_cam_state *cs,
+ unsigned char *addr)
+{
+ int i;
+
+ for (i = 0; i < 6; i++)
+ cs->cam[i] |= (u64)addr[i] << (8 * (cs->cam_index));
+ cs->cam_mask |= (1ULL << cs->cam_index);
+ cs->cam_index++;
+}
+
+static void octeon_mgmt_set_rx_filtering(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+ int i;
+ union cvmx_agl_gmx_rxx_adr_ctl adr_ctl;
+ union cvmx_agl_gmx_prtx_cfg agl_gmx_prtx;
+ unsigned long flags;
+ unsigned int prev_packet_enable;
+ unsigned int cam_mode = 1; /* 1 - Accept on CAM match */
+ unsigned int multicast_mode = 1; /* 1 - Reject all multicast. */
+ struct octeon_mgmt_cam_state cam_state;
+ struct dev_addr_list *list;
+ struct list_head *pos;
+ int available_cam_entries;
+
+ memset(&cam_state, 0, sizeof(cam_state));
+
+ if ((netdev->flags & IFF_PROMISC) || netdev->dev_addrs.count > 7) {
+ cam_mode = 0;
+ available_cam_entries = 8;
+ } else {
+ /*
+ * One CAM entry for the primary address, leaves seven
+ * for the secondary addresses.
+ */
+ available_cam_entries = 7 - netdev->dev_addrs.count;
+ }
+
+ if (netdev->flags & IFF_MULTICAST) {
+ if (cam_mode == 0 || (netdev->flags & IFF_ALLMULTI)
+ || netdev->mc_count > available_cam_entries)
+ multicast_mode = 2; /* 1 - Accept all multicast. */
+ else
+ multicast_mode = 0; /* 0 - Use CAM. */
+ }
+
+ if (cam_mode == 1) {
+ /* Add primary address. */
+ octeon_mgmt_cam_state_add(&cam_state, netdev->dev_addr);
+ list_for_each(pos, &netdev->dev_addrs.list) {
+ struct netdev_hw_addr *hw_addr;
+ hw_addr = list_entry(pos, struct netdev_hw_addr, list);
+ octeon_mgmt_cam_state_add(&cam_state, hw_addr->addr);
+ list = list->next;
+ }
+ }
+ if (multicast_mode == 0) {
+ i = netdev->mc_count;
+ list = netdev->mc_list;
+ while (i--) {
+ octeon_mgmt_cam_state_add(&cam_state, list->da_addr);
+ list = list->next;
+ }
+ }
+
+
+ spin_lock_irqsave(&p->lock, flags);
+
+ /* Disable packet I/O. */
+ agl_gmx_prtx.u64 = cvmx_read_csr(CVMX_AGL_GMX_PRTX_CFG(port));
+ prev_packet_enable = agl_gmx_prtx.s.en;
+ agl_gmx_prtx.s.en = 0;
+ cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port), agl_gmx_prtx.u64);
+
+
+ adr_ctl.u64 = 0;
+ adr_ctl.s.cam_mode = cam_mode;
+ adr_ctl.s.mcst = multicast_mode;
+ adr_ctl.s.bcst = 1; /* Allow broadcast */
+
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CTL(port), adr_ctl.u64);
+
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM0(port), cam_state.cam[0]);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM1(port), cam_state.cam[1]);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM2(port), cam_state.cam[2]);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM3(port), cam_state.cam[3]);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM4(port), cam_state.cam[4]);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM5(port), cam_state.cam[5]);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_ADR_CAM_EN(port), cam_state.cam_mask);
+
+ /* Restore packet I/O. */
+ agl_gmx_prtx.s.en = prev_packet_enable;
+ cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port), agl_gmx_prtx.u64);
+
+ spin_unlock_irqrestore(&p->lock, flags);
+}
+
+static int octeon_mgmt_set_mac_address(struct net_device *netdev, void *addr)
+{
+ struct sockaddr *sa = addr;
+
+ if (!is_valid_ether_addr(sa->sa_data))
+ return -EADDRNOTAVAIL;
+
+ memcpy(netdev->dev_addr, sa->sa_data, ETH_ALEN);
+
+ octeon_mgmt_set_rx_filtering(netdev);
+
+ return 0;
+}
+
+static int octeon_mgmt_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+ int size_without_fcs = new_mtu + OCTEON_MGMT_RX_HEADROOM;
+
+ /*
+ * Limit the MTU to make sure the ethernet packets are between
+ * 64 bytes and 16383 bytes.
+ */
+ if (size_without_fcs < 64 || size_without_fcs > 16383) {
+ dev_warn(p->dev, "MTU must be between %d and %d.\n",
+ 64 - OCTEON_MGMT_RX_HEADROOM,
+ 16383 - OCTEON_MGMT_RX_HEADROOM);
+ return -EINVAL;
+ }
+
+ netdev->mtu = new_mtu;
+
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_FRM_MAX(port), size_without_fcs);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_JABBER(port),
+ (size_without_fcs + 7) & 0xfff8);
+
+ return 0;
+}
+
+static irqreturn_t octeon_mgmt_interrupt(int cpl, void *dev_id)
+{
+ struct net_device *netdev = dev_id;
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+ union cvmx_mixx_isr mixx_isr;
+
+ mixx_isr.u64 = cvmx_read_csr(CVMX_MIXX_ISR(port));
+
+ /* Clear any pending interrupts */
+ cvmx_write_csr(CVMX_MIXX_ISR(port),
+ cvmx_read_csr(CVMX_MIXX_ISR(port)));
+ cvmx_read_csr(CVMX_MIXX_ISR(port));
+
+ if (mixx_isr.s.irthresh) {
+ octeon_mgmt_disable_rx_irq(p);
+ napi_schedule(&p->napi);
+ }
+ if (mixx_isr.s.orthresh) {
+ octeon_mgmt_disable_tx_irq(p);
+ tasklet_schedule(&p->tx_clean_tasklet);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static int octeon_mgmt_ioctl(struct net_device *netdev,
+ struct ifreq *rq, int cmd)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+
+ if (!netif_running(netdev))
+ return -EINVAL;
+
+ if (!p->phydev)
+ return -EINVAL;
+
+ return phy_mii_ioctl(p->phydev, if_mii(rq), cmd);
+}
+
+static void octeon_mgmt_adjust_link(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+ union cvmx_agl_gmx_prtx_cfg prtx_cfg;
+ unsigned long flags;
+ int link_changed = 0;
+
+ spin_lock_irqsave(&p->lock, flags);
+ if (p->phydev->link) {
+ if (!p->last_link)
+ link_changed = 1;
+ if (p->last_duplex != p->phydev->duplex) {
+ p->last_duplex = p->phydev->duplex;
+ prtx_cfg.u64 =
+ cvmx_read_csr(CVMX_AGL_GMX_PRTX_CFG(port));
+ prtx_cfg.s.duplex = p->phydev->duplex;
+ cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port),
+ prtx_cfg.u64);
+ }
+ } else {
+ if (p->last_link)
+ link_changed = -1;
+ }
+ p->last_link = p->phydev->link;
+ spin_unlock_irqrestore(&p->lock, flags);
+
+ if (link_changed != 0) {
+ if (link_changed > 0) {
+ netif_carrier_on(netdev);
+ pr_info("%s: Link is up - %d/%s\n", netdev->name,
+ p->phydev->speed,
+ DUPLEX_FULL == p->phydev->duplex ?
+ "Full" : "Half");
+ } else {
+ netif_carrier_off(netdev);
+ pr_info("%s: Link is down\n", netdev->name);
+ }
+ }
+}
+
+static int octeon_mgmt_init_phy(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ char phy_id[20];
+
+ if (octeon_is_simulation()) {
+ /* No PHYs in the simulator. */
+ netif_carrier_on(netdev);
+ return 0;
+ }
+
+ snprintf(phy_id, sizeof(phy_id), PHY_ID_FMT, "0", p->port);
+
+ p->phydev = phy_connect(netdev, phy_id, octeon_mgmt_adjust_link, 0,
+ PHY_INTERFACE_MODE_MII);
+
+ if (IS_ERR(p->phydev)) {
+ p->phydev = NULL;
+ return -1;
+ }
+
+ phy_start_aneg(p->phydev);
+
+ return 0;
+}
+
+static int octeon_mgmt_open(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+ union cvmx_mixx_ctl mix_ctl;
+ union cvmx_agl_gmx_inf_mode agl_gmx_inf_mode;
+ union cvmx_mixx_oring1 oring1;
+ union cvmx_mixx_iring1 iring1;
+ union cvmx_agl_gmx_prtx_cfg prtx_cfg;
+ union cvmx_agl_gmx_rxx_frm_ctl rxx_frm_ctl;
+ union cvmx_mixx_irhwm mix_irhwm;
+ union cvmx_mixx_orhwm mix_orhwm;
+ union cvmx_mixx_intena mix_intena;
+ struct sockaddr sa;
+
+ /* Allocate ring buffers. */
+ p->tx_ring = kzalloc(ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
+ GFP_KERNEL);
+ if (!p->tx_ring)
+ return -ENOMEM;
+ p->tx_ring_handle =
+ dma_map_single(p->dev, p->tx_ring,
+ ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+ p->tx_next = 0;
+ p->tx_next_clean = 0;
+ p->tx_current_fill = 0;
+
+
+ p->rx_ring = kzalloc(ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
+ GFP_KERNEL);
+ if (!p->rx_ring)
+ goto err_nomem;
+ p->rx_ring_handle =
+ dma_map_single(p->dev, p->rx_ring,
+ ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+
+ p->rx_next = 0;
+ p->rx_next_fill = 0;
+ p->rx_current_fill = 0;
+
+ octeon_mgmt_reset_hw(p);
+
+ mix_ctl.u64 = cvmx_read_csr(CVMX_MIXX_CTL(port));
+
+ /* Bring it out of reset if needed. */
+ if (mix_ctl.s.reset) {
+ mix_ctl.s.reset = 0;
+ cvmx_write_csr(CVMX_MIXX_CTL(port), mix_ctl.u64);
+ do {
+ mix_ctl.u64 = cvmx_read_csr(CVMX_MIXX_CTL(port));
+ } while (mix_ctl.s.reset);
+ }
+
+ agl_gmx_inf_mode.u64 = 0;
+ agl_gmx_inf_mode.s.en = 1;
+ cvmx_write_csr(CVMX_AGL_GMX_INF_MODE, agl_gmx_inf_mode.u64);
+
+ oring1.u64 = 0;
+ oring1.s.obase = p->tx_ring_handle >> 3;
+ oring1.s.osize = OCTEON_MGMT_TX_RING_SIZE;
+ cvmx_write_csr(CVMX_MIXX_ORING1(port), oring1.u64);
+
+ iring1.u64 = 0;
+ iring1.s.ibase = p->rx_ring_handle >> 3;
+ iring1.s.isize = OCTEON_MGMT_RX_RING_SIZE;
+ cvmx_write_csr(CVMX_MIXX_IRING1(port), iring1.u64);
+
+ /* Disable packet I/O. */
+ prtx_cfg.u64 = cvmx_read_csr(CVMX_AGL_GMX_PRTX_CFG(port));
+ prtx_cfg.s.en = 0;
+ cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port), prtx_cfg.u64);
+
+ memcpy(sa.sa_data, netdev->dev_addr, ETH_ALEN);
+ octeon_mgmt_set_mac_address(netdev, &sa);
+
+ octeon_mgmt_change_mtu(netdev, netdev->mtu);
+
+ /*
+ * Enable the port HW. Packets are not allowed until
+ * cvmx_mgmt_port_enable() is called.
+ */
+ mix_ctl.u64 = 0;
+ mix_ctl.s.crc_strip = 1; /* Strip the ending CRC */
+ mix_ctl.s.en = 1; /* Enable the port */
+ mix_ctl.s.nbtarb = 0; /* Arbitration mode */
+ /* MII CB-request FIFO programmable high watermark */
+ mix_ctl.s.mrq_hwm = 1;
+ cvmx_write_csr(CVMX_MIXX_CTL(port), mix_ctl.u64);
+
+ if (OCTEON_IS_MODEL(OCTEON_CN56XX_PASS1_X)
+ || OCTEON_IS_MODEL(OCTEON_CN52XX_PASS1_X)) {
+ /*
+ * Force compensation values, as they are not
+ * determined properly by HW
+ */
+ union cvmx_agl_gmx_drv_ctl drv_ctl;
+
+ drv_ctl.u64 = cvmx_read_csr(CVMX_AGL_GMX_DRV_CTL);
+ if (port) {
+ drv_ctl.s.byp_en1 = 1;
+ drv_ctl.s.nctl1 = 6;
+ drv_ctl.s.pctl1 = 6;
+ } else {
+ drv_ctl.s.byp_en = 1;
+ drv_ctl.s.nctl = 6;
+ drv_ctl.s.pctl = 6;
+ }
+ cvmx_write_csr(CVMX_AGL_GMX_DRV_CTL, drv_ctl.u64);
+ }
+
+ octeon_mgmt_rx_fill_ring(netdev);
+
+ /* Clear statistics. */
+ /* Clear on read. */
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_STATS_CTL(port), 1);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_STATS_PKTS_DRP(port), 0);
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_STATS_PKTS_BAD(port), 0);
+
+ cvmx_write_csr(CVMX_AGL_GMX_TXX_STATS_CTL(port), 1);
+ cvmx_write_csr(CVMX_AGL_GMX_TXX_STAT0(port), 0);
+ cvmx_write_csr(CVMX_AGL_GMX_TXX_STAT1(port), 0);
+
+ /* Clear any pending interrupts */
+ cvmx_write_csr(CVMX_MIXX_ISR(port), cvmx_read_csr(CVMX_MIXX_ISR(port)));
+
+ if (request_irq(p->irq, octeon_mgmt_interrupt, 0, netdev->name,
+ netdev)) {
+ dev_err(p->dev, "request_irq(%d) failed.\n", p->irq);
+ goto err_noirq;
+ }
+
+ /* Interrupt every single RX packet */
+ mix_irhwm.u64 = 0;
+ mix_irhwm.s.irhwm = 0;
+ cvmx_write_csr(CVMX_MIXX_IRHWM(port), mix_irhwm.u64);
+
+ /* Interrupt when we have 5 or more packets to clean. */
+ mix_orhwm.u64 = 0;
+ mix_orhwm.s.orhwm = 5;
+ cvmx_write_csr(CVMX_MIXX_ORHWM(port), mix_orhwm.u64);
+
+ /* Enable receive and transmit interrupts */
+ mix_intena.u64 = 0;
+ mix_intena.s.ithena = 1;
+ mix_intena.s.othena = 1;
+ cvmx_write_csr(CVMX_MIXX_INTENA(port), mix_intena.u64);
+
+
+ /* Enable packet I/O. */
+
+ rxx_frm_ctl.u64 = 0;
+ rxx_frm_ctl.s.pre_align = 1;
+ /*
+ * When set, disables the length check for non-min sized pkts
+ * with padding in the client data.
+ */
+ rxx_frm_ctl.s.pad_len = 1;
+ /* When set, disables the length check for VLAN pkts */
+ rxx_frm_ctl.s.vlan_len = 1;
+ /* When set, PREAMBLE checking is less strict */
+ rxx_frm_ctl.s.pre_free = 1;
+ /* Control Pause Frames can match station SMAC */
+ rxx_frm_ctl.s.ctl_smac = 0;
+ /* Control Pause Frames can match globally assign Multicast address */
+ rxx_frm_ctl.s.ctl_mcst = 1;
+ /* Forward pause information to TX block */
+ rxx_frm_ctl.s.ctl_bck = 1;
+ /* Drop Control Pause Frames */
+ rxx_frm_ctl.s.ctl_drp = 1;
+ /* Strip off the preamble */
+ rxx_frm_ctl.s.pre_strp = 1;
+ /*
+ * This port is configured to send PREAMBLE+SFD to begin every
+ * frame. GMX checks that the PREAMBLE is sent correctly.
+ */
+ rxx_frm_ctl.s.pre_chk = 1;
+ cvmx_write_csr(CVMX_AGL_GMX_RXX_FRM_CTL(port), rxx_frm_ctl.u64);
+
+ /* Enable the AGL block */
+ agl_gmx_inf_mode.u64 = 0;
+ agl_gmx_inf_mode.s.en = 1;
+ cvmx_write_csr(CVMX_AGL_GMX_INF_MODE, agl_gmx_inf_mode.u64);
+
+ /* Configure the port duplex and enables */
+ prtx_cfg.u64 = cvmx_read_csr(CVMX_AGL_GMX_PRTX_CFG(port));
+ prtx_cfg.s.tx_en = 1;
+ prtx_cfg.s.rx_en = 1;
+ prtx_cfg.s.en = 1;
+ p->last_duplex = 1;
+ prtx_cfg.s.duplex = p->last_duplex;
+ cvmx_write_csr(CVMX_AGL_GMX_PRTX_CFG(port), prtx_cfg.u64);
+
+ p->last_link = 0;
+ netif_carrier_off(netdev);
+
+ if (octeon_mgmt_init_phy(netdev)) {
+ dev_err(p->dev, "Cannot initialize PHY.\n");
+ goto err_noirq;
+ }
+
+ netif_wake_queue(netdev);
+ napi_enable(&p->napi);
+
+ return 0;
+err_noirq:
+ octeon_mgmt_reset_hw(p);
+ dma_unmap_single(p->dev, p->rx_ring_handle,
+ ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+ kfree(p->rx_ring);
+err_nomem:
+ dma_unmap_single(p->dev, p->tx_ring_handle,
+ ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+ kfree(p->tx_ring);
+ return -ENOMEM;
+}
+
+static int octeon_mgmt_stop(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+
+ napi_disable(&p->napi);
+ netif_stop_queue(netdev);
+
+ if (p->phydev)
+ phy_disconnect(p->phydev);
+
+ netif_carrier_off(netdev);
+
+ octeon_mgmt_reset_hw(p);
+
+
+ free_irq(p->irq, netdev);
+
+ /* dma_unmap is a nop on Octeon, so just free everything. */
+ skb_queue_purge(&p->tx_list);
+ skb_queue_purge(&p->rx_list);
+
+ dma_unmap_single(p->dev, p->rx_ring_handle,
+ ring_size_to_bytes(OCTEON_MGMT_RX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+ kfree(p->rx_ring);
+
+ dma_unmap_single(p->dev, p->tx_ring_handle,
+ ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+ kfree(p->tx_ring);
+
+
+ return 0;
+}
+
+static int octeon_mgmt_xmit(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+ int port = p->port;
+ union mgmt_port_ring_entry re;
+ unsigned long flags;
+
+ re.d64 = 0;
+ re.s.len = skb->len;
+ re.s.addr = dma_map_single(p->dev, skb->data,
+ skb->len,
+ DMA_TO_DEVICE);
+
+ spin_lock_irqsave(&p->tx_list.lock, flags);
+
+ if (unlikely(p->tx_current_fill >=
+ ring_max_fill(OCTEON_MGMT_TX_RING_SIZE))) {
+ spin_unlock_irqrestore(&p->tx_list.lock, flags);
+
+ dma_unmap_single(p->dev, re.s.addr, re.s.len,
+ DMA_TO_DEVICE);
+
+ netif_stop_queue(netdev);
+ return NETDEV_TX_BUSY;
+ }
+
+ __skb_queue_tail(&p->tx_list, skb);
+
+ /* Put it in the ring. */
+ p->tx_ring[p->tx_next] = re.d64;
+ p->tx_next = (p->tx_next + 1) % OCTEON_MGMT_TX_RING_SIZE;
+ p->tx_current_fill++;
+
+ spin_unlock_irqrestore(&p->tx_list.lock, flags);
+
+ dma_sync_single_for_device(p->dev, p->tx_ring_handle,
+ ring_size_to_bytes(OCTEON_MGMT_TX_RING_SIZE),
+ DMA_BIDIRECTIONAL);
+
+ netdev->stats.tx_packets++;
+ netdev->stats.tx_bytes += skb->len;
+
+ /* Ring the bell. */
+ cvmx_write_csr(CVMX_MIXX_ORING2(port), 1);
+
+ netdev->trans_start = jiffies;
+ octeon_mgmt_clean_tx_buffers(p);
+ octeon_mgmt_update_tx_stats(netdev);
+ return NETDEV_TX_OK;
+}
+
+#ifdef CONFIG_NET_POLL_CONTROLLER
+static void octeon_mgmt_poll_controller(struct net_device *netdev)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+
+ octeon_mgmt_receive_packets(p, 16);
+ octeon_mgmt_update_rx_stats(netdev);
+ return;
+}
+#endif
+
+static void octeon_mgmt_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *info)
+{
+ strncpy(info->driver, DRV_NAME, sizeof(info->driver));
+ strncpy(info->version, DRV_VERSION, sizeof(info->version));
+ strncpy(info->fw_version, "N/A", sizeof(info->fw_version));
+ strncpy(info->bus_info, "N/A", sizeof(info->bus_info));
+ info->n_stats = 0;
+ info->testinfo_len = 0;
+ info->regdump_len = 0;
+ info->eedump_len = 0;
+}
+
+static int octeon_mgmt_get_settings(struct net_device *netdev,
+ struct ethtool_cmd *cmd)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+
+ if (p->phydev)
+ return phy_ethtool_gset(p->phydev, cmd);
+
+ return -EINVAL;
+}
+
+static int octeon_mgmt_set_settings(struct net_device *netdev,
+ struct ethtool_cmd *cmd)
+{
+ struct octeon_mgmt *p = netdev_priv(netdev);
+
+ if (!capable(CAP_NET_ADMIN))
+ return -EPERM;
+
+ if (p->phydev)
+ return phy_ethtool_sset(p->phydev, cmd);
+
+ return -EINVAL;
+}
+
+static const struct ethtool_ops octeon_mgmt_ethtool_ops = {
+ .get_drvinfo = octeon_mgmt_get_drvinfo,
+ .get_link = ethtool_op_get_link,
+ .get_settings = octeon_mgmt_get_settings,
+ .set_settings = octeon_mgmt_set_settings
+};
+
+static const struct net_device_ops octeon_mgmt_ops = {
+ .ndo_open = octeon_mgmt_open,
+ .ndo_stop = octeon_mgmt_stop,
+ .ndo_start_xmit = octeon_mgmt_xmit,
+ .ndo_set_rx_mode = octeon_mgmt_set_rx_filtering,
+ .ndo_set_multicast_list = octeon_mgmt_set_rx_filtering,
+ .ndo_set_mac_address = octeon_mgmt_set_mac_address,
+ .ndo_do_ioctl = octeon_mgmt_ioctl,
+ .ndo_change_mtu = octeon_mgmt_change_mtu,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = octeon_mgmt_poll_controller,
+#endif
+};
+
+static int __init octeon_mgmt_probe(struct platform_device *pdev)
+{
+ struct resource *res_irq;
+ struct net_device *netdev;
+ struct octeon_mgmt *p;
+ int i;
+
+ netdev = alloc_etherdev(sizeof(struct octeon_mgmt));
+ if (netdev == NULL)
+ return -ENOMEM;
+
+ dev_set_drvdata(&pdev->dev, netdev);
+ p = netdev_priv(netdev);
+ netif_napi_add(netdev, &p->napi, octeon_mgmt_napi_poll,
+ OCTEON_MGMT_NAPI_WEIGHT);
+
+ p->netdev = netdev;
+ p->dev = &pdev->dev;
+
+ p->port = pdev->id;
+ snprintf(netdev->name, IFNAMSIZ, "mgmt%d", p->port);
+
+ res_irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ if (!res_irq)
+ goto err;
+
+ p->irq = res_irq->start;
+ spin_lock_init(&p->lock);
+
+ skb_queue_head_init(&p->tx_list);
+ skb_queue_head_init(&p->rx_list);
+ tasklet_init(&p->tx_clean_tasklet,
+ octeon_mgmt_clean_tx_tasklet, (unsigned long)p);
+
+ netdev->netdev_ops = &octeon_mgmt_ops;
+ netdev->ethtool_ops = &octeon_mgmt_ethtool_ops;
+
+
+ /* The mgmt ports get the first N MACs. */
+ for (i = 0; i < 6; i++)
+ netdev->dev_addr[i] = octeon_bootinfo->mac_addr_base[i];
+ netdev->dev_addr[5] += p->port;
+
+ if (p->port >= octeon_bootinfo->mac_addr_count)
+ dev_err(&pdev->dev,
+ "Error %s: Using MAC outside of the assigned range: "
+ "%02x:%02x:%02x:%02x:%02x:%02x\n", netdev->name,
+ netdev->dev_addr[0], netdev->dev_addr[1],
+ netdev->dev_addr[2], netdev->dev_addr[3],
+ netdev->dev_addr[4], netdev->dev_addr[5]);
+
+ if (register_netdev(netdev))
+ goto err;
+
+ dev_info(&pdev->dev, "Version " DRV_VERSION "\n");
+ return 0;
+err:
+ free_netdev(netdev);
+ return -ENOENT;
+}
+
+static int __exit octeon_mgmt_remove(struct platform_device *pdev)
+{
+ struct net_device *netdev = dev_get_drvdata(&pdev->dev);
+
+ unregister_netdev(netdev);
+ free_netdev(netdev);
+ return 0;
+}
+
+static struct platform_driver octeon_mgmt_driver = {
+ .driver = {
+ .name = "octeon_mgmt",
+ .owner = THIS_MODULE,
+ },
+ .probe = octeon_mgmt_probe,
+ .remove = __exit_p(octeon_mgmt_remove),
+};
+
+extern void octeon_mdiobus_force_mod_depencency(void);
+
+static int __init octeon_mgmt_mod_init(void)
+{
+ /* Force our mdiobus driver module to be loaded first. */
+ octeon_mdiobus_force_mod_depencency();
+ return platform_driver_register(&octeon_mgmt_driver);
+}
+
+static void __exit octeon_mgmt_mod_exit(void)
+{
+ platform_driver_unregister(&octeon_mgmt_driver);
+}
+
+module_init(octeon_mgmt_mod_init);
+module_exit(octeon_mgmt_mod_exit);
+
+MODULE_DESCRIPTION(DRV_DESCRIPTION);
+MODULE_AUTHOR("David Daney");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
projects / linux.git / commitdiff