diff options
Diffstat (limited to 'drivers/net/ps3_gelic_net.c')
| -rw-r--r-- | drivers/net/ps3_gelic_net.c | 1579 |
1 files changed, 0 insertions, 1579 deletions
diff --git a/drivers/net/ps3_gelic_net.c b/drivers/net/ps3_gelic_net.c deleted file mode 100644 index 0a42bf51746..00000000000 --- a/drivers/net/ps3_gelic_net.c +++ /dev/null @@ -1,1579 +0,0 @@ -/* - * 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; - gelic_net_set_descr_status(descr, - 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 = descr->skb; - - BUG_ON(!(descr->data_status & (1 << GELIC_NET_TXDESC_TAIL))); - - dma_unmap_single(ctodev(card), descr->buf_addr, skb->len, - DMA_TO_DEVICE); - dev_kfree_skb_any(skb); - - 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 */ - gelic_net_set_descr_status(descr, GELIC_NET_DESCR_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: - if (tx_chain->tail->skb) { - 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) */ - if (!stop) - goto out; - } - gelic_net_release_tx_descr(card, tx_chain->tail); - release ++; - } -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); - - napi_disable(&card->napi); - 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 the next descriptor is free */ - 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) - 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 - * - * 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) -{ - if (skb->ip_summed != CHECKSUM_PARTIAL) - descr->dmac_cmd_status = GELIC_NET_DMAC_CMDSTAT_NOCS | - GELIC_NET_DMAC_CMDSTAT_END_FRAME; - 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 | - GELIC_NET_DMAC_CMDSTAT_END_FRAME; - - else if (ip_hdr(skb)->protocol == IPPROTO_UDP) - descr->dmac_cmd_status = - GELIC_NET_DMAC_CMDSTAT_UDPCS | - GELIC_NET_DMAC_CMDSTAT_END_FRAME; - 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 | - GELIC_NET_DMAC_CMDSTAT_END_FRAME; - } - } -} - -static inline struct sk_buff *gelic_put_vlan_tag(struct sk_buff *skb, - unsigned short tag) -{ - struct vlan_ethhdr *veth; - static unsigned int c; - - if (skb_headroom(skb) < VLAN_HLEN) { - struct sk_buff *sk_tmp = skb; - pr_debug("%s: hd=%d c=%ud\n", __func__, skb_headroom(skb), c); - skb = skb_realloc_headroom(sk_tmp, VLAN_HLEN); - if (!skb) - return NULL; - dev_kfree_skb_any(sk_tmp); - } - veth = (struct vlan_ethhdr *)skb_push(skb, VLAN_HLEN); - - /* Move the mac addresses to the top of buffer */ - memmove(skb->data, skb->data + VLAN_HLEN, 2 * ETH_ALEN); - - veth->h_vlan_proto = __constant_htons(ETH_P_8021Q); - veth->h_vlan_TCI = htons(tag); - - return skb; -} - -/** - * 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; - - if (card->vlan_index != -1) { - struct sk_buff *skb_tmp; - skb_tmp = gelic_put_vlan_tag(skb, - card->vlan_id[card->vlan_index]); - if (!skb_tmp) - return -ENOMEM; - skb = skb_tmp; - } - - buf = dma_map_single(ctodev(card), skb->data, skb->len, DMA_TO_DEVICE); - - if (!buf) { - dev_err(ctodev(card), - "dma map 2 failed (%p, %i). Dropping packet\n", - skb->data, skb->len); - return -ENOMEM; - } - - descr->buf_addr = buf; - descr->buf_size = skb->len; - descr->skb = skb; - descr->data_status = 0; - descr->next_descr_addr = 0; /* terminate hw descr */ - gelic_net_set_txdescr_cmdstat(descr, skb); - - /* bump free descriptor pointer */ - card->tx_chain.head = descr->next; - 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 = 0; - - if (card->tx_dma_progress) - return 0; - - if (gelic_net_get_descr_status(descr) == GELIC_NET_DESCR_CARDOWNED) { - card->tx_dma_progress = 1; - status = lv1_net_start_tx_dma(bus_id(card), dev_id(card), - descr->bus_addr, 0); - if (status) - dev_info(ctodev(card), "lv1_net_start_txdma failed," \ - "status=%d\n", 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; - int result; - unsigned long flags; - - spin_lock_irqsave(&card->tx_dma_lock, flags); - - gelic_net_release_tx_chain(card, 0); - - descr = gelic_net_get_next_tx_descr(card); - if (!descr) { - /* - * no more descriptors free - */ - 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) { - /* - * DMA map failed. As chanses are that failure - * would continue, just release skb and return - */ - card->netdev->stats.tx_dropped++; - dev_kfree_skb_any(skb); - spin_unlock_irqrestore(&card->tx_dma_lock, flags); - return NETDEV_TX_OK; - } - /* - * link this prepared descriptor to previous one - * to achieve high performance - */ - descr->prev->next_descr_addr = descr->bus_addr; - /* - * as hardware descriptor is modified in the above lines, - * ensure that the hardware sees it - */ - wmb(); - if (gelic_net_kick_txdma(card, descr)) { - /* - * kick failed. - * release descriptors which were just prepared - */ - card->netdev->stats.tx_dropped++; - gelic_net_release_tx_descr(card, descr); - gelic_net_release_tx_descr(card, descr->next); - card->tx_chain.tail = descr->next->next; - dev_info(ctodev(card), "%s: kick failure\n", __func__); - } else { - /* OK, DMA started/reserved */ - netdev->trans_start = jiffies; - } - - spin_unlock_irqrestore(&card->tx_dma_lock, flags); - return NETDEV_TX_OK; -} - -/** - * 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_BUFFER_FULL) { - /* - * Buffer full would occur if and only if - * the frame length was longer than the size of this - * descriptor's buffer. If the frame length was equal - * to or shorter than buffer'size, FRAME_END condition - * would occur. - * Anyway this frame was longer than the MTU, - * just drop it. - */ - dev_info(ctodev(card), "overlength frame\n"); - goto refill; - } - /* - * descriptoers any other than FRAME_END here should - * be treated as error. - */ - if (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); -refill: - /* - * So that always DMAC can see the end - * of the descriptor chain to avoid - * from unwanted DMAC overrun. - */ - descr->next_descr_addr = 0; - - /* change the descriptor state: */ - gelic_net_set_descr_status(descr, GELIC_NET_DESCR_NOT_IN_USE); - - /* - * this call can fail, but for now, just leave this - * decriptor without skb - */ - gelic_net_prepare_rx_descr(card, descr); - - chain->head = descr; - chain->tail = descr->next; - - /* - * Set this descriptor the end of the chain. - */ - descr->prev->next_descr_addr = descr->bus_addr; - - /* - * If dmac chain was met, DMAC stopped. - * thus re-enable it - */ - if (dmac_chain_ended) { - card->rx_dma_restart_required = 1; - dev_dbg(ctodev(card), "reenable rx dma scheduled\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 napi_struct *napi, int budget) -{ - struct gelic_net_card *card = container_of(napi, struct gelic_net_card, napi); - struct net_device *netdev = card->netdev; - int packets_done = 0; - - while (packets_done < budget) { - if (!gelic_net_decode_one_descr(card)) - break; - - packets_done++; - } - - if (packets_done < budget) { - netif_rx_complete(netdev, napi); - gelic_net_rx_irq_on(card); - } - return packets_done; -} -/** - * 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 (card->rx_dma_restart_required) { - card->rx_dma_restart_required = 0; - gelic_net_enable_rxdmac(card); - } - - if (status & GELIC_NET_RXINT) { - gelic_net_rx_irq_off(card); - netif_rx_schedule(netdev, &card->napi); - } - - if (status & GELIC_NET_TXINT) { - spin_lock_irqsave(&card->tx_dma_lock, flags); - card->tx_dma_progress = 0; - gelic_net_release_tx_chain(card, 0); - /* kick outstanding tx descriptor if any */ - gelic_net_kick_txdma(card, card->tx_chain.tail); - spin_unlock_irqrestore(&card->tx_dma_lock, flags); - } - 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, card->netdev->name, 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_TX_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; - - napi_enable(&card->napi); - - 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); - - 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; -} - -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, -}; - -/** - * 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->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; - netdev->ethtool_ops = &gelic_net_ethtool_ops; -} - -/** - * 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; - DECLARE_MAC_BUF(mac); - - 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); - - netif_napi_add(netdev, &card->napi, - gelic_net_poll, GELIC_NET_NAPI_WEIGHT); - - 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 %s\n", - print_mac(mac, netdev->dev_addr)); - - 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; - netdev->hard_header_len += VLAN_HLEN; - } - - 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); - |