/* * PS3 gelic network driver. * * Copyright (C) 2007 Sony Computer Entertainment Inc. * Copyright 2006, 2007 Sony Corporation * * This file is based on: spider_net.c * * (C) Copyright IBM Corp. 2005 * * Authors : Utz Bacher <utz.bacher@de.ibm.com> * Jens Osterkamp <Jens.Osterkamp@de.ibm.com> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2, or (at your option) * any later version. * * 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., 675 Mass Ave, Cambridge, MA 02139, USA. */ #undef DEBUG #include <linux/kernel.h> #include <linux/module.h> #include <linux/etherdevice.h> #include <linux/ethtool.h> #include <linux/if_vlan.h> #include <linux/in.h> #include <linux/ip.h> #include <linux/tcp.h> #include <linux/dma-mapping.h> #include <net/checksum.h> #include <asm/firmware.h> #include <asm/ps3.h> #include <asm/lv1call.h> #include "ps3_gelic_net.h" #define DRV_NAME "Gelic Network Driver" #define DRV_VERSION "1.0" MODULE_AUTHOR("SCE Inc."); MODULE_DESCRIPTION("Gelic Network driver"); MODULE_LICENSE("GPL"); static inline struct device *ctodev(struct gelic_net_card *card) { return &card->dev->core; } static inline unsigned int bus_id(struct gelic_net_card *card) { return card->dev->bus_id; } static inline unsigned int dev_id(struct gelic_net_card *card) { return card->dev->dev_id; } /* set irq_mask */ static int gelic_net_set_irq_mask(struct gelic_net_card *card, u64 mask) { int status; status = lv1_net_set_interrupt_mask(bus_id(card), dev_id(card), mask, 0); if (status) dev_info(ctodev(card), "lv1_net_set_interrupt_mask failed %d\n", status); return status; } static inline void gelic_net_rx_irq_on(struct gelic_net_card *card) { gelic_net_set_irq_mask(card, card->ghiintmask | GELIC_NET_RXINT); } static inline void gelic_net_rx_irq_off(struct gelic_net_card *card) { gelic_net_set_irq_mask(card, card->ghiintmask & ~GELIC_NET_RXINT); } /** * gelic_net_get_descr_status -- returns the status of a descriptor * @descr: descriptor to look at * * returns the status as in the dmac_cmd_status field of the descriptor */ static enum gelic_net_descr_status gelic_net_get_descr_status(struct gelic_net_descr *descr) { u32 cmd_status; cmd_status = descr->dmac_cmd_status; cmd_status >>= GELIC_NET_DESCR_IND_PROC_SHIFT; return cmd_status; } /** * gelic_net_set_descr_status -- sets the status of a descriptor * @descr: descriptor to change * @status: status to set in the descriptor * * changes the status to the specified value. Doesn't change other bits * in the status */ static void gelic_net_set_descr_status(struct gelic_net_descr *descr, enum gelic_net_descr_status status) { u32 cmd_status; /* read the status */ cmd_status = descr->dmac_cmd_status; /* clean the upper 4 bits */ cmd_status &= GELIC_NET_DESCR_IND_PROC_MASKO; /* add the status to it */ cmd_status |= ((u32)status) << GELIC_NET_DESCR_IND_PROC_SHIFT; /* and write it back */ descr->dmac_cmd_status = cmd_status; /* * dma_cmd_status field is used to indicate whether the descriptor * is valid or not. * Usually caller of this function wants to inform that to the * hardware, so we assure here the hardware sees the change. */ wmb(); } /** * gelic_net_free_chain - free descriptor chain * @card: card structure * @descr_in: address of desc */ static void gelic_net_free_chain(struct gelic_net_card *card, struct gelic_net_descr *descr_in) { struct gelic_net_descr *descr; for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) { dma_unmap_single(ctodev(card), descr->bus_addr, GELIC_NET_DESCR_SIZE, DMA_BIDIRECTIONAL); descr->bus_addr = 0; } } /** * gelic_net_init_chain - links descriptor chain * @card: card structure * @chain: address of chain * @start_descr: address of descriptor array * @no: number of descriptors * * we manage a circular list that mirrors the hardware structure, * except that the hardware uses bus addresses. * * returns 0 on success, <0 on failure */ static int gelic_net_init_chain(struct gelic_net_card *card, struct gelic_net_descr_chain *chain, struct gelic_net_descr *start_descr, int no) { int i; struct gelic_net_descr *descr; descr = start_descr; memset(descr, 0, sizeof(*descr) * no); /* set up the hardware pointers in each descriptor */ for (i = 0; i < no; i++, descr++) { gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE); descr->bus_addr = dma_map_single(ctodev(card), descr, GELIC_NET_DESCR_SIZE, DMA_BIDIRECTIONAL); if (!descr->bus_addr) goto iommu_error; descr->next = descr + 1; descr->prev = descr - 1; } /* make them as ring */ (descr - 1)->next = start_descr; start_descr->prev = (descr - 1); /* chain bus addr of hw descriptor */ descr = start_descr; for (i = 0; i < no; i++, descr++) { descr->next_descr_addr = descr->next->bus_addr; } chain->head = start_descr; chain->tail = start_descr; /* do not chain last hw descriptor */ (descr - 1)->next_descr_addr = 0; return 0; iommu_error: for (i--, descr--; 0 <= i; i--, descr--) if (descr->bus_addr) dma_unmap_single(ctodev(card), descr->bus_addr, GELIC_NET_DESCR_SIZE, DMA_BIDIRECTIONAL); return -ENOMEM; } /** * gelic_net_prepare_rx_descr - reinitializes a rx descriptor * @card: card structure * @descr: descriptor to re-init * * return 0 on succes, <0 on failure * * allocates a new rx skb, iommu-maps it and attaches it to the descriptor. * Activate the descriptor state-wise */ static int gelic_net_prepare_rx_descr(struct gelic_net_card *card, struct gelic_net_descr *descr) { int offset; unsigned int bufsize; if (gelic_net_get_descr_status(descr) != GELIC_NET_DESCR_NOT_IN_USE) { dev_info(ctodev(card), "%s: ERROR status \n", __func__); } /* we need to round up the buffer size to a multiple of 128 */ bufsize = ALIGN(GELIC_NET_MAX_MTU, GELIC_NET_RXBUF_ALIGN); /* and we need to have it 128 byte aligned, therefore we allocate a * bit more */ descr->skb = netdev_alloc_skb(card->netdev, bufsize + GELIC_NET_RXBUF_ALIGN - 1); if (!descr->skb) { descr->buf_addr = 0; /* tell DMAC don't touch memory */ dev_info(ctodev(card), "%s:allocate skb failed !!\n", __func__); return -ENOMEM; } descr->buf_size = bufsize; descr->dmac_cmd_status = 0; descr->result_size = 0; descr->valid_size = 0; descr->data_error = 0; offset = ((unsigned long)descr->skb->data) & (GELIC_NET_RXBUF_ALIGN - 1); if (offset) skb_reserve(descr->skb, GELIC_NET_RXBUF_ALIGN - offset); /* io-mmu-map the skb */ descr->buf_addr = dma_map_single(ctodev(card), descr->skb->data, GELIC_NET_MAX_MTU, DMA_FROM_DEVICE); if (!descr->buf_addr) { dev_kfree_skb_any(descr->skb); descr->skb = NULL; dev_info(ctodev(card), "%s:Could not iommu-map rx buffer\n", __func__); gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE); return -ENOMEM; } else { gelic_net_set_descr_status(descr, GELIC_NET_DESCR_CARDOWNED); return 0; } } /** * gelic_net_release_rx_chain - free all skb of rx descr * @card: card structure * */ static void gelic_net_release_rx_chain(struct gelic_net_card *card) { struct gelic_net_descr *descr = card->rx_chain.head; do { if (descr->skb) { dma_unmap_single(ctodev(card), descr->buf_addr, descr->skb->len, DMA_FROM_DEVICE); descr->buf_addr = 0; dev_kfree_skb_any(descr->skb); descr->skb = NULL; descr->dmac_cmd_status = GELIC_NET_DESCR_NOT_IN_USE; } descr = descr->next; } while (descr != card->rx_chain.head); } /** * gelic_net_fill_rx_chain - fills descriptors/skbs in the rx chains * @card: card structure * * fills all descriptors in the rx chain: allocates skbs * and iommu-maps them. * returns 0 on success, <0 on failure */ static int gelic_net_fill_rx_chain(struct gelic_net_card *card) { struct gelic_net_descr *descr = card->rx_chain.head; int ret; do { if (!descr->skb) { ret = gelic_net_prepare_rx_descr(card, descr); if (ret) goto rewind; } descr = descr->next; } while (descr != card->rx_chain.head); return 0; rewind: gelic_net_release_rx_chain(card); return ret; } /** * gelic_net_alloc_rx_skbs - allocates rx skbs in rx descriptor chains * @card: card structure * * returns 0 on success, <0 on failure */ static int gelic_net_alloc_rx_skbs(struct gelic_net_card *card) { struct gelic_net_descr_chain *chain; int ret; chain = &card->rx_chain; ret = gelic_net_fill_rx_chain(card); chain->head = card->rx_top->prev; /* point to the last */ return ret; } /** * gelic_net_release_tx_descr - processes a used tx descriptor * @card: card structure * @descr: descriptor to release * * releases a used tx descriptor (unmapping, freeing of skb) */ static void gelic_net_release_tx_descr(struct gelic_net_card *card, struct gelic_net_descr *descr) { struct sk_buff *skb; if (descr->data_status & (1 << GELIC_NET_TXDESC_TAIL)) { /* 2nd descriptor */ skb = descr->skb; dma_unmap_single(ctodev(card), descr->buf_addr, skb->len, DMA_TO_DEVICE); dev_kfree_skb_any(skb); } else { dma_unmap_single(ctodev(card), descr->buf_addr, descr->buf_size, DMA_TO_DEVICE); } descr->buf_addr = 0; descr->buf_size = 0; descr->next_descr_addr = 0; descr->result_size = 0; descr->valid_size = 0; descr->data_status = 0; descr->data_error = 0; descr->skb = NULL; /* set descr status */ descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOT_IN_USE; } /** * gelic_net_release_tx_chain - processes sent tx descriptors * @card: adapter structure * @stop: net_stop sequence * * releases the tx descriptors that gelic has finished with */ static void gelic_net_release_tx_chain(struct gelic_net_card *card, int stop) { struct gelic_net_descr_chain *tx_chain; enum gelic_net_descr_status status; int release = 0; for (tx_chain = &card->tx_chain; tx_chain->head != tx_chain->tail && tx_chain->tail; tx_chain->tail = tx_chain->tail->next) { status = gelic_net_get_descr_status(tx_chain->tail); switch (status) { case GELIC_NET_DESCR_RESPONSE_ERROR: case GELIC_NET_DESCR_PROTECTION_ERROR: case GELIC_NET_DESCR_FORCE_END: if (printk_ratelimit()) dev_info(ctodev(card), "%s: forcing end of tx descriptor " \ "with status %x\n", __func__, status); card->netdev_stats.tx_dropped++; break; case GELIC_NET_DESCR_COMPLETE: card->netdev_stats.tx_packets++; card->netdev_stats.tx_bytes += tx_chain->tail->skb->len; break; case GELIC_NET_DESCR_CARDOWNED: /* pending tx request */ default: /* any other value (== GELIC_NET_DESCR_NOT_IN_USE) */ goto out; } gelic_net_release_tx_descr(card, tx_chain->tail); release = 1; } out: if (!stop && release) netif_wake_queue(card->netdev); } /** * gelic_net_set_multi - sets multicast addresses and promisc flags * @netdev: interface device structure * * gelic_net_set_multi configures multicast addresses as needed for the * netdev interface. It also sets up multicast, allmulti and promisc * flags appropriately */ static void gelic_net_set_multi(struct net_device *netdev) { struct gelic_net_card *card = netdev_priv(netdev); struct dev_mc_list *mc; unsigned int i; uint8_t *p; u64 addr; int status; /* clear all multicast address */ status = lv1_net_remove_multicast_address(bus_id(card), dev_id(card), 0, 1); if (status) dev_err(ctodev(card), "lv1_net_remove_multicast_address failed %d\n", status); /* set broadcast address */ status = lv1_net_add_multicast_address(bus_id(card), dev_id(card), GELIC_NET_BROADCAST_ADDR, 0); if (status) dev_err(ctodev(card), "lv1_net_add_multicast_address failed, %d\n", status); if (netdev->flags & IFF_ALLMULTI || netdev->mc_count > GELIC_NET_MC_COUNT_MAX) { /* list max */ status = lv1_net_add_multicast_address(bus_id(card), dev_id(card), 0, 1); if (status) dev_err(ctodev(card), "lv1_net_add_multicast_address failed, %d\n", status); return; } /* set multicast address */ for (mc = netdev->mc_list; mc; mc = mc->next) { addr = 0; p = mc->dmi_addr; for (i = 0; i < ETH_ALEN; i++) { addr <<= 8; addr |= *p++; } status = lv1_net_add_multicast_address(bus_id(card), dev_id(card), addr, 0); if (status) dev_err(ctodev(card), "lv1_net_add_multicast_address failed, %d\n", status); } } /** * gelic_net_enable_rxdmac - enables the receive DMA controller * @card: card structure * * gelic_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN * in the GDADMACCNTR register */ static inline void gelic_net_enable_rxdmac(struct gelic_net_card *card) { int status; status = lv1_net_start_rx_dma(bus_id(card), dev_id(card), card->rx_chain.tail->bus_addr, 0); if (status) dev_info(ctodev(card), "lv1_net_start_rx_dma failed, status=%d\n", status); } /** * gelic_net_disable_rxdmac - disables the receive DMA controller * @card: card structure * * gelic_net_disable_rxdmac terminates processing on the DMA controller by * turing off DMA and issueing a force end */ static inline void gelic_net_disable_rxdmac(struct gelic_net_card *card) { int status; /* this hvc blocks until the DMA in progress really stopped */ status = lv1_net_stop_rx_dma(bus_id(card), dev_id(card), 0); if (status) dev_err(ctodev(card), "lv1_net_stop_rx_dma faild, %d\n", status); } /** * gelic_net_disable_txdmac - disables the transmit DMA controller * @card: card structure * * gelic_net_disable_txdmac terminates processing on the DMA controller by * turing off DMA and issueing a force end */ static inline void gelic_net_disable_txdmac(struct gelic_net_card *card) { int status; /* this hvc blocks until the DMA in progress really stopped */ status = lv1_net_stop_tx_dma(bus_id(card), dev_id(card), 0); if (status) dev_err(ctodev(card), "lv1_net_stop_tx_dma faild, status=%d\n", status); } /** * gelic_net_stop - called upon ifconfig down * @netdev: interface device structure * * always returns 0 */ static int gelic_net_stop(struct net_device *netdev) { struct gelic_net_card *card = netdev_priv(netdev); netif_poll_disable(netdev); netif_stop_queue(netdev); /* turn off DMA, force end */ gelic_net_disable_rxdmac(card); gelic_net_disable_txdmac(card); gelic_net_set_irq_mask(card, 0); /* disconnect event port */ free_irq(card->netdev->irq, card->netdev); ps3_sb_event_receive_port_destroy(card->dev, card->netdev->irq); card->netdev->irq = NO_IRQ; netif_carrier_off(netdev); /* release chains */ gelic_net_release_tx_chain(card, 1); gelic_net_release_rx_chain(card); gelic_net_free_chain(card, card->tx_top); gelic_net_free_chain(card, card->rx_top); return 0; } /** * gelic_net_get_next_tx_descr - returns the next available tx descriptor * @card: device structure to get descriptor from * * returns the address of the next descriptor, or NULL if not available. */ static struct gelic_net_descr * gelic_net_get_next_tx_descr(struct gelic_net_card *card) { if (!card->tx_chain.head) return NULL; /* see if we can two consecutive free descrs */ if (card->tx_chain.tail != card->tx_chain.head->next && gelic_net_get_descr_status(card->tx_chain.head) == GELIC_NET_DESCR_NOT_IN_USE && card->tx_chain.tail != card->tx_chain.head->next->next && gelic_net_get_descr_status(card->tx_chain.head->next) == GELIC_NET_DESCR_NOT_IN_USE ) return card->tx_chain.head; else return NULL; } /** * gelic_net_set_txdescr_cmdstat - sets the tx descriptor command field * @descr: descriptor structure to fill out * @skb: packet to consider * @middle: middle of frame * * fills out the command and status field of the descriptor structure, * depending on hardware checksum settings. This function assumes a wmb() * has executed before. */ static void gelic_net_set_txdescr_cmdstat(struct gelic_net_descr *descr, struct sk_buff *skb, int middle) { u32 eofr; if (middle) eofr = 0; else eofr = GELIC_NET_DMAC_CMDSTAT_END_FRAME; if (skb->ip_summed != CHECKSUM_PARTIAL) descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOCS | eofr; else { /* is packet ip? * if yes: tcp? udp? */ if (skb->protocol == htons(ETH_P_IP)) { if (ip_hdr(skb)->protocol == IPPROTO_TCP) descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_TCPCS | eofr; else if (ip_hdr(skb)->protocol == IPPROTO_UDP) descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_UDPCS | eofr; else /* * the stack should checksum non-tcp and non-udp * packets on his own: NETIF_F_IP_CSUM */ descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOCS | eofr; } } } /** * gelic_net_prepare_tx_descr_v - get dma address of skb_data * @card: card structure * @descr: descriptor structure * @skb: packet to use * * returns 0 on success, <0 on failure. * */ static int gelic_net_prepare_tx_descr_v(struct gelic_net_card *card, struct gelic_net_descr *descr, struct sk_buff *skb) { dma_addr_t buf[2]; unsigned int vlan_len; if (skb->len < GELIC_NET_VLAN_POS) return -EINVAL; memcpy(&descr->vlan, skb->data, GELIC_NET_VLAN_POS); if (card->vlan_index != -1) { descr->vlan.h_vlan_proto = htons(ETH_P_8021Q); /* vlan 0x8100*/ descr->vlan.h_vlan_TCI = htons(card->vlan_id[card->vlan_index]); vlan_len = GELIC_NET_VLAN_POS + VLAN_HLEN; /* VLAN_HLEN=4 */ } else vlan_len = GELIC_NET_VLAN_POS; /* no vlan tag */ /* first descr */ buf[0] = dma_map_single(ctodev(card), &descr->vlan, vlan_len, DMA_TO_DEVICE); if (!buf[0]) { dev_err(ctodev(card), "dma map 1 failed (%p, %i). Dropping packet\n", skb->data, vlan_len); return -ENOMEM; } descr->buf_addr = buf[0]; descr->buf_size = vlan_len; descr->skb = skb; /* not used */ descr->data_status = 0; gelic_net_set_txdescr_cmdstat(descr, skb, 1); /* not the frame end */ /* second descr */ card->tx_chain.head = card->tx_chain.head->next; descr->next_descr_addr = descr->next->bus_addr; descr = descr->next; if (gelic_net_get_descr_status(descr) != GELIC_NET_DESCR_NOT_IN_USE) /* XXX will be removed */ dev_err(ctodev(card), "descr is not free!\n"); buf[1] = dma_map_single(ctodev(card), skb->data + GELIC_NET_VLAN_POS, skb->len - GELIC_NET_VLAN_POS, DMA_TO_DEVICE); if (!buf[1]) { dev_err(ctodev(card), "dma map 2 failed (%p, %i). Dropping packet\n", skb->data + GELIC_NET_VLAN_POS, skb->len - GELIC_NET_VLAN_POS); dma_unmap_single(ctodev(card), buf[0], vlan_len, DMA_TO_DEVICE); return -ENOMEM; } descr->buf_addr = buf[1]; descr->buf_size = skb->len - GELIC_NET_VLAN_POS; descr->skb = skb; descr->data_status = 0; descr->next_descr_addr = 0; /* terminate hw descr */ gelic_net_set_txdescr_cmdstat(descr, skb, 0); return 0; } /** * gelic_net_kick_txdma - enables TX DMA processing * @card: card structure * @descr: descriptor address to enable TX processing at * */ static int gelic_net_kick_txdma(struct gelic_net_card *card, struct gelic_net_descr *descr) { int status = -ENXIO; int count = 10; if (card->tx_dma_progress) return 0; if (gelic_net_get_descr_status(descr) == GELIC_NET_DESCR_CARDOWNED) { card->tx_dma_progress = 1; /* sometimes we need retry here */ while (count--) { status = lv1_net_start_tx_dma(bus_id(card), dev_id(card), descr->bus_addr, 0); if (!status) break; } if (!count) dev_info(ctodev(card), "lv1_net_start_txdma failed," \ "status=%d %#lx\n", status, card->irq_status); } return status; } /** * gelic_net_xmit - transmits a frame over the device * @skb: packet to send out * @netdev: interface device structure * * returns 0 on success, <0 on failure */ static int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev) { struct gelic_net_card *card = netdev_priv(netdev); struct gelic_net_descr *descr = NULL; int result; unsigned long flags; spin_lock_irqsave(&card->tx_dma_lock, flags); gelic_net_release_tx_chain(card, 0); if (!skb) goto kick; descr = gelic_net_get_next_tx_descr(card); if (!descr) { netif_stop_queue(netdev); spin_unlock_irqrestore(&card->tx_dma_lock, flags); return NETDEV_TX_BUSY; } result = gelic_net_prepare_tx_descr_v(card, descr, skb); if (result) goto error; card->tx_chain.head = card->tx_chain.head->next; if (descr->prev) descr->prev->next_descr_addr = descr->bus_addr; kick: /* * as hardware descriptor is modified in the above lines, * ensure that the hardware sees it */ wmb(); if (gelic_net_kick_txdma(card, card->tx_chain.tail)) goto error; netdev->trans_start = jiffies; spin_unlock_irqrestore(&card->tx_dma_lock, flags); return NETDEV_TX_OK; error: card->netdev_stats.tx_dropped++; spin_unlock_irqrestore(&card->tx_dma_lock, flags); return NETDEV_TX_LOCKED; } /** * gelic_net_pass_skb_up - takes an skb from a descriptor and passes it on * @descr: descriptor to process * @card: card structure * * iommu-unmaps the skb, fills out skb structure and passes the data to the * stack. The descriptor state is not changed. */ static void gelic_net_pass_skb_up(struct gelic_net_descr *descr, struct gelic_net_card *card) { struct sk_buff *skb; struct net_device *netdev; u32 data_status, data_error; data_status = descr->data_status; data_error = descr->data_error; netdev = card->netdev; /* unmap skb buffer */ skb = descr->skb; dma_unmap_single(ctodev(card), descr->buf_addr, GELIC_NET_MAX_MTU, DMA_FROM_DEVICE); skb_put(skb, descr->valid_size? descr->valid_size : descr->result_size); if (!descr->valid_size) dev_info(ctodev(card), "buffer full %x %x %x\n", descr->result_size, descr->buf_size, descr->dmac_cmd_status); descr->skb = NULL; /* * the card put 2 bytes vlan tag in front * of the ethernet frame */ skb_pull(skb, 2); skb->protocol = eth_type_trans(skb, netdev); /* checksum offload */ if (card->rx_csum) { if ((data_status & GELIC_NET_DATA_STATUS_CHK_MASK) && (!(data_error & GELIC_NET_DATA_ERROR_CHK_MASK))) skb->ip_summed = CHECKSUM_UNNECESSARY; else skb->ip_summed = CHECKSUM_NONE; } else skb->ip_summed = CHECKSUM_NONE; /* update netdevice statistics */ card->netdev_stats.rx_packets++; card->netdev_stats.rx_bytes += skb->len; /* pass skb up to stack */ netif_receive_skb(skb); } /** * gelic_net_decode_one_descr - processes an rx descriptor * @card: card structure * * returns 1 if a packet has been sent to the stack, otherwise 0 * * processes an rx descriptor by iommu-unmapping the data buffer and passing * the packet up to the stack */ static int gelic_net_decode_one_descr(struct gelic_net_card *card) { enum gelic_net_descr_status status; struct gelic_net_descr_chain *chain = &card->rx_chain; struct gelic_net_descr *descr = chain->tail; int dmac_chain_ended; status = gelic_net_get_descr_status(descr); /* is this descriptor terminated with next_descr == NULL? */ dmac_chain_ended = descr->dmac_cmd_status & GELIC_NET_DMAC_CMDSTAT_RXDCEIS; if (status == GELIC_NET_DESCR_CARDOWNED) return 0; if (status == GELIC_NET_DESCR_NOT_IN_USE) { dev_dbg(ctodev(card), "dormant descr? %p\n", descr); return 0; } if ((status == GELIC_NET_DESCR_RESPONSE_ERROR) || (status == GELIC_NET_DESCR_PROTECTION_ERROR) || (status == GELIC_NET_DESCR_FORCE_END)) { dev_info(ctodev(card), "dropping RX descriptor with state %x\n", status); card->netdev_stats.rx_dropped++; goto refill; } if ((status != GELIC_NET_DESCR_COMPLETE) && (status != GELIC_NET_DESCR_FRAME_END)) { dev_dbg(ctodev(card), "RX descriptor with state %x\n", status); goto refill; } /* ok, we've got a packet in descr */ gelic_net_pass_skb_up(descr, card); /* 1: skb_up sccess */ refill: descr->next_descr_addr = 0; /* unlink the descr */ /* change the descriptor state: */ gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE); /* refill one desc * FIXME: this can fail, but for now, just leave this * descriptor without skb */ gelic_net_prepare_rx_descr(card, descr); chain->head = descr; chain->tail = descr->next; descr->prev->next_descr_addr = descr->bus_addr; if (dmac_chain_ended) { gelic_net_enable_rxdmac(card); dev_dbg(ctodev(card), "reenable rx dma\n"); } return 1; } /** * gelic_net_poll - NAPI poll function called by the stack to return packets * @netdev: interface device structure * @budget: number of packets we can pass to the stack at most * * returns 0 if no more packets available to the driver/stack. Returns 1, * if the quota is exceeded, but the driver has still packets. * */ static int gelic_net_poll(struct net_device *netdev, int *budget) { struct gelic_net_card *card = netdev_priv(netdev); int packets_to_do, packets_done = 0; int no_more_packets = 0; packets_to_do = min(*budget, netdev->quota); while (packets_to_do) { if (gelic_net_decode_one_descr(card)) { packets_done++; packets_to_do--; } else { /* no more packets for the stack */ no_more_packets = 1; break; } } netdev->quota -= packets_done; *budget -= packets_done; if (no_more_packets) { netif_rx_complete(netdev); gelic_net_rx_irq_on(card); return 0; } else return 1; } /** * gelic_net_get_stats - get interface statistics * @netdev: interface device structure * * returns the interface statistics residing in the gelic_net_card struct */ static struct net_device_stats *gelic_net_get_stats(struct net_device *netdev) { struct gelic_net_card *card = netdev_priv(netdev); return &card->netdev_stats; } /** * gelic_net_change_mtu - changes the MTU of an interface * @netdev: interface device structure * @new_mtu: new MTU value * * returns 0 on success, <0 on failure */ static int gelic_net_change_mtu(struct net_device *netdev, int new_mtu) { /* no need to re-alloc skbs or so -- the max mtu is about 2.3k * and mtu is outbound only anyway */ if ((new_mtu < GELIC_NET_MIN_MTU) || (new_mtu > GELIC_NET_MAX_MTU)) { return -EINVAL; } netdev->mtu = new_mtu; return 0; } /** * gelic_net_interrupt - event handler for gelic_net */ static irqreturn_t gelic_net_interrupt(int irq, void *ptr) { unsigned long flags; struct net_device *netdev = ptr; struct gelic_net_card *card = netdev_priv(netdev); u64 status; status = card->irq_status; if (!status) return IRQ_NONE; if (status & GELIC_NET_RXINT) { gelic_net_rx_irq_off(card); netif_rx_schedule(netdev); } if (status & GELIC_NET_TXINT) { spin_lock_irqsave(&card->tx_dma_lock, flags); card->tx_dma_progress = 0; spin_unlock_irqrestore(&card->tx_dma_lock, flags); /* start pending DMA */ gelic_net_xmit(NULL, netdev); } return IRQ_HANDLED; } #ifdef CONFIG_NET_POLL_CONTROLLER /** * gelic_net_poll_controller - artificial interrupt for netconsole etc. * @netdev: interface device structure * * see Documentation/networking/netconsole.txt */ static void gelic_net_poll_controller(struct net_device *netdev) { struct gelic_net_card *card = netdev_priv(netdev); gelic_net_set_irq_mask(card, 0); gelic_net_interrupt(netdev->irq, netdev); gelic_net_set_irq_mask(card, card->ghiintmask); } #endif /* CONFIG_NET_POLL_CONTROLLER */ /** * gelic_net_open_device - open device and map dma region * @card: card structure */ static int gelic_net_open_device(struct gelic_net_card *card) { int result; result = ps3_sb_event_receive_port_setup(card->dev, PS3_BINDING_CPU_ANY, &card->netdev->irq); if (result) { dev_info(ctodev(card), "%s:%d: gelic_net_open_device failed (%d)\n", __func__, __LINE__, result); result = -EPERM; goto fail_alloc_irq; } result = request_irq(card->netdev->irq, gelic_net_interrupt, IRQF_DISABLED, "gelic network", card->netdev); if (result) { dev_info(ctodev(card), "%s:%d: request_irq failed (%d)\n", __func__, __LINE__, result); goto fail_request_irq; } return 0; fail_request_irq: ps3_sb_event_receive_port_destroy(card->dev, card->netdev->irq); card->netdev->irq = NO_IRQ; fail_alloc_irq: return result; } /** * gelic_net_open - called upon ifonfig up * @netdev: interface device structure * * returns 0 on success, <0 on failure * * gelic_net_open allocates all the descriptors and memory needed for * operation, sets up multicast list and enables interrupts */ static int gelic_net_open(struct net_device *netdev) { struct gelic_net_card *card = netdev_priv(netdev); dev_dbg(ctodev(card), " -> %s:%d\n", __func__, __LINE__); gelic_net_open_device(card); if (gelic_net_init_chain(card, &card->tx_chain, card->descr, GELIC_NET_TX_DESCRIPTORS)) goto alloc_tx_failed; if (gelic_net_init_chain(card, &card->rx_chain, card->descr + GELIC_NET_RX_DESCRIPTORS, GELIC_NET_RX_DESCRIPTORS)) goto alloc_rx_failed; /* head of chain */ card->tx_top = card->tx_chain.head; card->rx_top = card->rx_chain.head; dev_dbg(ctodev(card), "descr rx %p, tx %p, size %#lx, num %#x\n", card->rx_top, card->tx_top, sizeof(struct gelic_net_descr), GELIC_NET_RX_DESCRIPTORS); /* allocate rx skbs */ if (gelic_net_alloc_rx_skbs(card)) goto alloc_skbs_failed; card->tx_dma_progress = 0; card->ghiintmask = GELIC_NET_RXINT | GELIC_NET_TXINT; gelic_net_set_irq_mask(card, card->ghiintmask); gelic_net_enable_rxdmac(card); netif_start_queue(netdev); netif_carrier_on(netdev); netif_poll_enable(netdev); return 0; alloc_skbs_failed: gelic_net_free_chain(card, card->rx_top); alloc_rx_failed: gelic_net_free_chain(card, card->tx_top); alloc_tx_failed: return -ENOMEM; } #ifdef GELIC_NET_ETHTOOL static void gelic_net_get_drvinfo (struct net_device *netdev, struct ethtool_drvinfo *info) { strncpy(info->driver, DRV_NAME, sizeof(info->driver) - 1); strncpy(info->version, DRV_VERSION, sizeof(info->version) - 1); } static int gelic_net_get_settings(struct net_device *netdev, struct ethtool_cmd *cmd) { struct gelic_net_card *card = netdev_priv(netdev); int status; u64 v1, v2; int speed, duplex; speed = duplex = -1; status = lv1_net_control(bus_id(card), dev_id(card), GELIC_NET_GET_ETH_PORT_STATUS, GELIC_NET_PORT, 0, 0, &v1, &v2); if (status) { /* link down */ } else { if (v1 & GELIC_NET_FULL_DUPLEX) { duplex = DUPLEX_FULL; } else { duplex = DUPLEX_HALF; } if (v1 & GELIC_NET_SPEED_10 ) { speed = SPEED_10; } else if (v1 & GELIC_NET_SPEED_100) { speed = SPEED_100; } else if (v1 & GELIC_NET_SPEED_1000) { speed = SPEED_1000; } } cmd->supported = SUPPORTED_TP | SUPPORTED_Autoneg | SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full | SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full | SUPPORTED_1000baseT_Half | SUPPORTED_1000baseT_Full; cmd->advertising = cmd->supported; cmd->speed = speed; cmd->duplex = duplex; cmd->autoneg = AUTONEG_ENABLE; /* always enabled */ cmd->port = PORT_TP; return 0; } static u32 gelic_net_get_link(struct net_device *netdev) { struct gelic_net_card *card = netdev_priv(netdev); int status; u64 v1, v2; int link; status = lv1_net_control(bus_id(card), dev_id(card), GELIC_NET_GET_ETH_PORT_STATUS, GELIC_NET_PORT, 0, 0, &v1, &v2); if (status) return 0; /* link down */ if (v1 & GELIC_NET_LINK_UP) link = 1; else link = 0; return link; } static int gelic_net_nway_reset(struct net_device *netdev) { if (netif_running(netdev)) { gelic_net_stop(netdev); gelic_net_open(netdev); } return 0; } static u32 gelic_net_get_tx_csum(struct net_device *netdev) { return (netdev->features & NETIF_F_IP_CSUM) != 0; } static int gelic_net_set_tx_csum(struct net_device *netdev, u32 data) { if (data) netdev->features |= NETIF_F_IP_CSUM; else netdev->features &= ~NETIF_F_IP_CSUM; return 0; } static u32 gelic_net_get_rx_csum(struct net_device *netdev) { struct gelic_net_card *card = netdev_priv(netdev); return card->rx_csum; } static int gelic_net_set_rx_csum(struct net_device *netdev, u32 data) { struct gelic_net_card *card = netdev_priv(netdev); card->rx_csum = data; return 0; } static struct ethtool_ops gelic_net_ethtool_ops = { .get_drvinfo = gelic_net_get_drvinfo, .get_settings = gelic_net_get_settings, .get_link = gelic_net_get_link, .nway_reset = gelic_net_nway_reset, .get_tx_csum = gelic_net_get_tx_csum, .set_tx_csum = gelic_net_set_tx_csum, .get_rx_csum = gelic_net_get_rx_csum, .set_rx_csum = gelic_net_set_rx_csum, }; #endif /** * gelic_net_tx_timeout_task - task scheduled by the watchdog timeout * function (to be called not under interrupt status) * @work: work is context of tx timout task * * called as task when tx hangs, resets interface (if interface is up) */ static void gelic_net_tx_timeout_task(struct work_struct *work) { struct gelic_net_card *card = container_of(work, struct gelic_net_card, tx_timeout_task); struct net_device *netdev = card->netdev; dev_info(ctodev(card), "%s:Timed out. Restarting... \n", __func__); if (!(netdev->flags & IFF_UP)) goto out; netif_device_detach(netdev); gelic_net_stop(netdev); gelic_net_open(netdev); netif_device_attach(netdev); out: atomic_dec(&card->tx_timeout_task_counter); } /** * gelic_net_tx_timeout - called when the tx timeout watchdog kicks in. * @netdev: interface device structure * * called, if tx hangs. Schedules a task that resets the interface */ static void gelic_net_tx_timeout(struct net_device *netdev) { struct gelic_net_card *card; card = netdev_priv(netdev); atomic_inc(&card->tx_timeout_task_counter); if (netdev->flags & IFF_UP) schedule_work(&card->tx_timeout_task); else atomic_dec(&card->tx_timeout_task_counter); } /** * gelic_net_setup_netdev_ops - initialization of net_device operations * @netdev: net_device structure * * fills out function pointers in the net_device structure */ static void gelic_net_setup_netdev_ops(struct net_device *netdev) { netdev->open = &gelic_net_open; netdev->stop = &gelic_net_stop; netdev->hard_start_xmit = &gelic_net_xmit; netdev->get_stats = &gelic_net_get_stats; netdev->set_multicast_list = &gelic_net_set_multi; netdev->change_mtu = &gelic_net_change_mtu; /* tx watchdog */ netdev->tx_timeout = &gelic_net_tx_timeout; netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT; /* NAPI */ netdev->poll = &gelic_net_poll; netdev->weight = GELIC_NET_NAPI_WEIGHT; #ifdef GELIC_NET_ETHTOOL netdev->ethtool_ops = &gelic_net_ethtool_ops; #endif } /** * gelic_net_setup_netdev - initialization of net_device * @card: card structure * * Returns 0 on success or <0 on failure * * gelic_net_setup_netdev initializes the net_device structure **/ static int gelic_net_setup_netdev(struct gelic_net_card *card) { struct net_device *netdev = card->netdev; struct sockaddr addr; unsigned int i; int status; u64 v1, v2; SET_MODULE_OWNER(netdev); SET_NETDEV_DEV(netdev, &card->dev->core); spin_lock_init(&card->tx_dma_lock); card->rx_csum = GELIC_NET_RX_CSUM_DEFAULT; gelic_net_setup_netdev_ops(netdev); netdev->features = NETIF_F_IP_CSUM; status = lv1_net_control(bus_id(card), dev_id(card), GELIC_NET_GET_MAC_ADDRESS, 0, 0, 0, &v1, &v2); if (status || !is_valid_ether_addr((u8 *)&v1)) { dev_info(ctodev(card), "%s:lv1_net_control GET_MAC_ADDR failed %d\n", __func__, status); return -EINVAL; } v1 <<= 16; memcpy(addr.sa_data, &v1, ETH_ALEN); memcpy(netdev->dev_addr, addr.sa_data, ETH_ALEN); dev_info(ctodev(card), "MAC addr %02x:%02x:%02x:%02x:%02x:%02x\n", netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2], netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]); card->vlan_index = -1; /* no vlan */ for (i = 0; i < GELIC_NET_VLAN_MAX; i++) { status = lv1_net_control(bus_id(card), dev_id(card), GELIC_NET_GET_VLAN_ID, i + 1, /* index; one based */ 0, 0, &v1, &v2); if (status == GELIC_NET_VLAN_NO_ENTRY) { dev_dbg(ctodev(card), "GELIC_VLAN_ID no entry:%d, VLAN disabled\n", status); card->vlan_id[i] = 0; } else if (status) { dev_dbg(ctodev(card), "%s:GELIC_NET_VLAN_ID faild, status=%d\n", __func__, status); card->vlan_id[i] = 0; } else { card->vlan_id[i] = (u32)v1; dev_dbg(ctodev(card), "vlan_id:%d, %lx\n", i, v1); } } if (card->vlan_id[GELIC_NET_VLAN_WIRED - 1]) card->vlan_index = GELIC_NET_VLAN_WIRED - 1; status = register_netdev(netdev); if (status) { dev_err(ctodev(card), "%s:Couldn't register net_device: %d\n", __func__, status); return status; } return 0; } /** * gelic_net_alloc_card - allocates net_device and card structure * * returns the card structure or NULL in case of errors * * the card and net_device structures are linked to each other */ static struct gelic_net_card *gelic_net_alloc_card(void) { struct net_device *netdev; struct gelic_net_card *card; size_t alloc_size; alloc_size = sizeof (*card) + sizeof (struct gelic_net_descr) * GELIC_NET_RX_DESCRIPTORS + sizeof (struct gelic_net_descr) * GELIC_NET_TX_DESCRIPTORS; /* * we assume private data is allocated 32 bytes (or more) aligned * so that gelic_net_descr should be 32 bytes aligned. * Current alloc_etherdev() does do it because NETDEV_ALIGN * is 32. * check this assumption here. */ BUILD_BUG_ON(NETDEV_ALIGN < 32); BUILD_BUG_ON(offsetof(struct gelic_net_card, irq_status) % 8); BUILD_BUG_ON(offsetof(struct gelic_net_card, descr) % 32); netdev = alloc_etherdev(alloc_size); if (!netdev) return NULL; card = netdev_priv(netdev); card->netdev = netdev; INIT_WORK(&card->tx_timeout_task, gelic_net_tx_timeout_task); init_waitqueue_head(&card->waitq); atomic_set(&card->tx_timeout_task_counter, 0); return card; } /** * ps3_gelic_driver_probe - add a device to the control of this driver */ static int ps3_gelic_driver_probe (struct ps3_system_bus_device *dev) { struct gelic_net_card *card = gelic_net_alloc_card(); int result; if (!card) { dev_info(&dev->core, "gelic_net_alloc_card failed\n"); result = -ENOMEM; goto fail_alloc_card; } ps3_system_bus_set_driver_data(dev, card); card->dev = dev; result = ps3_open_hv_device(dev); if (result) { dev_dbg(&dev->core, "ps3_open_hv_device failed\n"); goto fail_open; } result = ps3_dma_region_create(dev->d_region); if (result) { dev_dbg(&dev->core, "ps3_dma_region_create failed(%d)\n", result); BUG_ON("check region type"); goto fail_dma_region; } result = lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card), ps3_mm_phys_to_lpar(__pa(&card->irq_status)), 0); if (result) { dev_dbg(&dev->core, "lv1_net_set_interrupt_status_indicator failed: %s\n", ps3_result(result)); result = -EIO; goto fail_status_indicator; } result = gelic_net_setup_netdev(card); if (result) { dev_dbg(&dev->core, "%s:%d: ps3_dma_region_create failed: " "(%d)\n", __func__, __LINE__, result); goto fail_setup_netdev; } return 0; fail_setup_netdev: lv1_net_set_interrupt_status_indicator(bus_id(card), bus_id(card), 0 , 0); fail_status_indicator: ps3_dma_region_free(dev->d_region); fail_dma_region: ps3_close_hv_device(dev); fail_open: ps3_system_bus_set_driver_data(dev, NULL); free_netdev(card->netdev); fail_alloc_card: return result; } /** * ps3_gelic_driver_remove - remove a device from the control of this driver */ static int ps3_gelic_driver_remove (struct ps3_system_bus_device *dev) { struct gelic_net_card *card = ps3_system_bus_get_driver_data(dev); wait_event(card->waitq, atomic_read(&card->tx_timeout_task_counter) == 0); lv1_net_set_interrupt_status_indicator(bus_id(card), dev_id(card), 0 , 0); unregister_netdev(card->netdev); free_netdev(card->netdev); ps3_system_bus_set_driver_data(dev, NULL); ps3_dma_region_free(dev->d_region); ps3_close_hv_device(dev); return 0; } static struct ps3_system_bus_driver ps3_gelic_driver = { .match_id = PS3_MATCH_ID_GELIC, .probe = ps3_gelic_driver_probe, .remove = ps3_gelic_driver_remove, .shutdown = ps3_gelic_driver_remove, .core.name = "ps3_gelic_driver", .core.owner = THIS_MODULE, }; static int __init ps3_gelic_driver_init (void) { return firmware_has_feature(FW_FEATURE_PS3_LV1) ? ps3_system_bus_driver_register(&ps3_gelic_driver) : -ENODEV; } static void __exit ps3_gelic_driver_exit (void) { ps3_system_bus_driver_unregister(&ps3_gelic_driver); } module_init (ps3_gelic_driver_init); module_exit (ps3_gelic_driver_exit); MODULE_ALIAS(PS3_MODULE_ALIAS_GELIC);