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linux/drivers/net/ps3_gelic_net.c
Geoff Levand ecae42d370 net/ps3: Fix gelic RX DMA restart 
Fix the condition where PS3 network RX hangs when no network
TX is occurring by calling gelic_card_enable_rxdmac() during
RX_DMA_CHAIN_END event processing.

The gelic hardware automatically clears its RX_DMA_EN flag when
it detects an RX_DMA_CHAIN_END event.  In its processing of
RX_DMA_CHAIN_END the gelic driver is required to set RX_DMA_EN
(with a call to gelic_card_enable_rxdmac()) to restart RX DMA
transfers.  The existing gelic driver code does not set
RX_DMA_EN directly in its processing of the RX_DMA_CHAIN_END
event, but uses a flag variable card->rx_dma_restart_required
to schedule the setting of RX_DMA_EN until next inside the
interrupt handler.

It seems this delayed setting of RX_DMA_EN causes the hang since
the next RX interrupt after the RX_DMA_CHAIN_END event where
RX_DMA_EN is scheduled to be set will not occur since RX_DMA_EN
was not set.  In the case were network TX is occuring, RX_DMA_EN
is set in the next TX interrupt and RX processing continues.

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-07-14 16:03:29 -07:00

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/*
* 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/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/slab.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"
#include "ps3_gelic_wireless.h"
#define DRV_NAME "Gelic Network Driver"
#define DRV_VERSION "2.0"
MODULE_AUTHOR("SCE Inc.");
MODULE_DESCRIPTION("Gelic Network driver");
MODULE_LICENSE("GPL");
static inline void gelic_card_enable_rxdmac(struct gelic_card *card);
static inline void gelic_card_disable_rxdmac(struct gelic_card *card);
static inline void gelic_card_disable_txdmac(struct gelic_card *card);
static inline void gelic_card_reset_chain(struct gelic_card *card,
struct gelic_descr_chain *chain,
struct gelic_descr *start_descr);
/* set irq_mask */
int gelic_card_set_irq_mask(struct gelic_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),
"%s failed %d\n", __func__, status);
return status;
}
static inline void gelic_card_rx_irq_on(struct gelic_card *card)
{
card->irq_mask |= GELIC_CARD_RXINT;
gelic_card_set_irq_mask(card, card->irq_mask);
}
static inline void gelic_card_rx_irq_off(struct gelic_card *card)
{
card->irq_mask &= ~GELIC_CARD_RXINT;
gelic_card_set_irq_mask(card, card->irq_mask);
}
static void gelic_card_get_ether_port_status(struct gelic_card *card,
int inform)
{
u64 v2;
struct net_device *ether_netdev;
lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_GET_ETH_PORT_STATUS,
GELIC_LV1_VLAN_TX_ETHERNET_0, 0, 0,
&card->ether_port_status, &v2);
if (inform) {
ether_netdev = card->netdev[GELIC_PORT_ETHERNET_0];
if (card->ether_port_status & GELIC_LV1_ETHER_LINK_UP)
netif_carrier_on(ether_netdev);
else
netif_carrier_off(ether_netdev);
}
}
static int gelic_card_set_link_mode(struct gelic_card *card, int mode)
{
int status;
u64 v1, v2;
status = lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_SET_NEGOTIATION_MODE,
GELIC_LV1_PHY_ETHERNET_0, mode, 0, &v1, &v2);
if (status) {
pr_info("%s: failed setting negotiation mode %d\n", __func__,
status);
return -EBUSY;
}
card->link_mode = mode;
return 0;
}
void gelic_card_up(struct gelic_card *card)
{
pr_debug("%s: called\n", __func__);
mutex_lock(&card->updown_lock);
if (atomic_inc_return(&card->users) == 1) {
pr_debug("%s: real do\n", __func__);
/* enable irq */
gelic_card_set_irq_mask(card, card->irq_mask);
/* start rx */
gelic_card_enable_rxdmac(card);
napi_enable(&card->napi);
}
mutex_unlock(&card->updown_lock);
pr_debug("%s: done\n", __func__);
}
void gelic_card_down(struct gelic_card *card)
{
u64 mask;
pr_debug("%s: called\n", __func__);
mutex_lock(&card->updown_lock);
if (atomic_dec_if_positive(&card->users) == 0) {
pr_debug("%s: real do\n", __func__);
napi_disable(&card->napi);
/*
* Disable irq. Wireless interrupts will
* be disabled later if any
*/
mask = card->irq_mask & (GELIC_CARD_WLAN_EVENT_RECEIVED |
GELIC_CARD_WLAN_COMMAND_COMPLETED);
gelic_card_set_irq_mask(card, mask);
/* stop rx */
gelic_card_disable_rxdmac(card);
gelic_card_reset_chain(card, &card->rx_chain,
card->descr + GELIC_NET_TX_DESCRIPTORS);
/* stop tx */
gelic_card_disable_txdmac(card);
}
mutex_unlock(&card->updown_lock);
pr_debug("%s: done\n", __func__);
}
/**
* gelic_descr_get_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_descr_dma_status
gelic_descr_get_status(struct gelic_descr *descr)
{
return be32_to_cpu(descr->dmac_cmd_status) & GELIC_DESCR_DMA_STAT_MASK;
}
/**
* gelic_descr_set_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_descr_set_status(struct gelic_descr *descr,
enum gelic_descr_dma_status status)
{
descr->dmac_cmd_status = cpu_to_be32(status |
(be32_to_cpu(descr->dmac_cmd_status) &
~GELIC_DESCR_DMA_STAT_MASK));
/*
* 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_card_free_chain - free descriptor chain
* @card: card structure
* @descr_in: address of desc
*/
static void gelic_card_free_chain(struct gelic_card *card,
struct gelic_descr *descr_in)
{
struct gelic_descr *descr;
for (descr = descr_in; descr && descr->bus_addr; descr = descr->next) {
dma_unmap_single(ctodev(card), descr->bus_addr,
GELIC_DESCR_SIZE, DMA_BIDIRECTIONAL);
descr->bus_addr = 0;
}
}
/**
* gelic_card_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 __devinit gelic_card_init_chain(struct gelic_card *card,
struct gelic_descr_chain *chain,
struct gelic_descr *start_descr,
int no)
{
int i;
struct gelic_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_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
descr->bus_addr =
dma_map_single(ctodev(card), descr,
GELIC_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 = cpu_to_be32(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_DESCR_SIZE,
DMA_BIDIRECTIONAL);
return -ENOMEM;
}
/**
* gelic_card_reset_chain - reset status of a descriptor chain
* @card: card structure
* @chain: address of chain
* @start_descr: address of descriptor array
*
* Reset the status of dma descriptors to ready state
* and re-initialize the hardware chain for later use
*/
static void gelic_card_reset_chain(struct gelic_card *card,
struct gelic_descr_chain *chain,
struct gelic_descr *start_descr)
{
struct gelic_descr *descr;
for (descr = start_descr; start_descr != descr->next; descr++) {
gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
descr->next_descr_addr = cpu_to_be32(descr->next->bus_addr);
}
chain->head = start_descr;
chain->tail = (descr - 1);
(descr - 1)->next_descr_addr = 0;
}
/**
* gelic_descr_prepare_rx - reinitializes a rx descriptor
* @card: card structure
* @descr: descriptor to re-init
*
* return 0 on success, <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_descr_prepare_rx(struct gelic_card *card,
struct gelic_descr *descr)
{
int offset;
unsigned int bufsize;
if (gelic_descr_get_status(descr) != GELIC_DESCR_DMA_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 = dev_alloc_skb(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 = cpu_to_be32(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 = cpu_to_be32(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_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
return -ENOMEM;
} else {
gelic_descr_set_status(descr, GELIC_DESCR_DMA_CARDOWNED);
return 0;
}
}
/**
* gelic_card_release_rx_chain - free all skb of rx descr
* @card: card structure
*
*/
static void gelic_card_release_rx_chain(struct gelic_card *card)
{
struct gelic_descr *descr = card->rx_chain.head;
do {
if (descr->skb) {
dma_unmap_single(ctodev(card),
be32_to_cpu(descr->buf_addr),
descr->skb->len,
DMA_FROM_DEVICE);
descr->buf_addr = 0;
dev_kfree_skb_any(descr->skb);
descr->skb = NULL;
gelic_descr_set_status(descr,
GELIC_DESCR_DMA_NOT_IN_USE);
}
descr = descr->next;
} while (descr != card->rx_chain.head);
}
/**
* gelic_card_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_card_fill_rx_chain(struct gelic_card *card)
{
struct gelic_descr *descr = card->rx_chain.head;
int ret;
do {
if (!descr->skb) {
ret = gelic_descr_prepare_rx(card, descr);
if (ret)
goto rewind;
}
descr = descr->next;
} while (descr != card->rx_chain.head);
return 0;
rewind:
gelic_card_release_rx_chain(card);
return ret;
}
/**
* gelic_card_alloc_rx_skbs - allocates rx skbs in rx descriptor chains
* @card: card structure
*
* returns 0 on success, < 0 on failure
*/
static int __devinit gelic_card_alloc_rx_skbs(struct gelic_card *card)
{
struct gelic_descr_chain *chain;
int ret;
chain = &card->rx_chain;
ret = gelic_card_fill_rx_chain(card);
chain->tail = card->rx_top->prev; /* point to the last */
return ret;
}
/**
* gelic_descr_release_tx - processes a used tx descriptor
* @card: card structure
* @descr: descriptor to release
*
* releases a used tx descriptor (unmapping, freeing of skb)
*/
static void gelic_descr_release_tx(struct gelic_card *card,
struct gelic_descr *descr)
{
struct sk_buff *skb = descr->skb;
BUG_ON(!(be32_to_cpu(descr->data_status) & GELIC_DESCR_TX_TAIL));
dma_unmap_single(ctodev(card), be32_to_cpu(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_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
}
static void gelic_card_stop_queues(struct gelic_card *card)
{
netif_stop_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
if (card->netdev[GELIC_PORT_WIRELESS])
netif_stop_queue(card->netdev[GELIC_PORT_WIRELESS]);
}
static void gelic_card_wake_queues(struct gelic_card *card)
{
netif_wake_queue(card->netdev[GELIC_PORT_ETHERNET_0]);
if (card->netdev[GELIC_PORT_WIRELESS])
netif_wake_queue(card->netdev[GELIC_PORT_WIRELESS]);
}
/**
* gelic_card_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_card_release_tx_chain(struct gelic_card *card, int stop)
{
struct gelic_descr_chain *tx_chain;
enum gelic_descr_dma_status status;
struct net_device *netdev;
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_descr_get_status(tx_chain->tail);
netdev = tx_chain->tail->skb->dev;
switch (status) {
case GELIC_DESCR_DMA_RESPONSE_ERROR:
case GELIC_DESCR_DMA_PROTECTION_ERROR:
case GELIC_DESCR_DMA_FORCE_END:
if (printk_ratelimit())
dev_info(ctodev(card),
"%s: forcing end of tx descriptor " \
"with status %x\n",
__func__, status);
netdev->stats.tx_dropped++;
break;
case GELIC_DESCR_DMA_COMPLETE:
if (tx_chain->tail->skb) {
netdev->stats.tx_packets++;
netdev->stats.tx_bytes +=
tx_chain->tail->skb->len;
}
break;
case GELIC_DESCR_DMA_CARDOWNED:
/* pending tx request */
default:
/* any other value (== GELIC_DESCR_DMA_NOT_IN_USE) */
if (!stop)
goto out;
}
gelic_descr_release_tx(card, tx_chain->tail);
release ++;
}
out:
if (!stop && release)
gelic_card_wake_queues(card);
}
/**
* 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
*/
void gelic_net_set_multi(struct net_device *netdev)
{
struct gelic_card *card = netdev_card(netdev);
struct netdev_hw_addr *ha;
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(netdev) > GELIC_NET_MC_COUNT_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 addresses */
netdev_for_each_mc_addr(ha, netdev) {
addr = 0;
p = ha->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_card_enable_rxdmac - enables the receive DMA controller
* @card: card structure
*
* gelic_card_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
* in the GDADMACCNTR register
*/
static inline void gelic_card_enable_rxdmac(struct gelic_card *card)
{
int status;
#ifdef DEBUG
if (gelic_descr_get_status(card->rx_chain.head) !=
GELIC_DESCR_DMA_CARDOWNED) {
printk(KERN_ERR "%s: status=%x\n", __func__,
be32_to_cpu(card->rx_chain.head->dmac_cmd_status));
printk(KERN_ERR "%s: nextphy=%x\n", __func__,
be32_to_cpu(card->rx_chain.head->next_descr_addr));
printk(KERN_ERR "%s: head=%p\n", __func__,
card->rx_chain.head);
}
#endif
status = lv1_net_start_rx_dma(bus_id(card), dev_id(card),
card->rx_chain.head->bus_addr, 0);
if (status)
dev_info(ctodev(card),
"lv1_net_start_rx_dma failed, status=%d\n", status);
}
/**
* gelic_card_disable_rxdmac - disables the receive DMA controller
* @card: card structure
*
* gelic_card_disable_rxdmac terminates processing on the DMA controller by
* turing off DMA and issuing a force end
*/
static inline void gelic_card_disable_rxdmac(struct gelic_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 failed, %d\n", status);
}
/**
* gelic_card_disable_txdmac - disables the transmit DMA controller
* @card: card structure
*
* gelic_card_disable_txdmac terminates processing on the DMA controller by
* turing off DMA and issuing a force end
*/
static inline void gelic_card_disable_txdmac(struct gelic_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 failed, status=%d\n", status);
}
/**
* gelic_net_stop - called upon ifconfig down
* @netdev: interface device structure
*
* always returns 0
*/
int gelic_net_stop(struct net_device *netdev)
{
struct gelic_card *card;
pr_debug("%s: start\n", __func__);
netif_stop_queue(netdev);
netif_carrier_off(netdev);
card = netdev_card(netdev);
gelic_card_down(card);
pr_debug("%s: done\n", __func__);
return 0;
}
/**
* gelic_card_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_descr *
gelic_card_get_next_tx_descr(struct gelic_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_descr_get_status(card->tx_chain.head) ==
GELIC_DESCR_DMA_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_descr_set_tx_cmdstat(struct gelic_descr *descr,
struct sk_buff *skb)
{
if (skb->ip_summed != CHECKSUM_PARTIAL)
descr->dmac_cmd_status =
cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
GELIC_DESCR_TX_DMA_FRAME_TAIL);
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 =
cpu_to_be32(GELIC_DESCR_DMA_CMD_TCP_CHKSUM |
GELIC_DESCR_TX_DMA_FRAME_TAIL);
else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
descr->dmac_cmd_status =
cpu_to_be32(GELIC_DESCR_DMA_CMD_UDP_CHKSUM |
GELIC_DESCR_TX_DMA_FRAME_TAIL);
else /*
* the stack should checksum non-tcp and non-udp
* packets on his own: NETIF_F_IP_CSUM
*/
descr->dmac_cmd_status =
cpu_to_be32(GELIC_DESCR_DMA_CMD_NO_CHKSUM |
GELIC_DESCR_TX_DMA_FRAME_TAIL);
}
}
}
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 = cpu_to_be16(ETH_P_8021Q);
veth->h_vlan_TCI = htons(tag);
return skb;
}
/**
* gelic_descr_prepare_tx - setup a descriptor for sending packets
* @card: card structure
* @descr: descriptor structure
* @skb: packet to use
*
* returns 0 on success, <0 on failure.
*
*/
static int gelic_descr_prepare_tx(struct gelic_card *card,
struct gelic_descr *descr,
struct sk_buff *skb)
{
dma_addr_t buf;
if (card->vlan_required) {
struct sk_buff *skb_tmp;
enum gelic_port_type type;
type = netdev_port(skb->dev)->type;
skb_tmp = gelic_put_vlan_tag(skb,
card->vlan[type].tx);
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 = cpu_to_be32(buf);
descr->buf_size = cpu_to_be32(skb->len);
descr->skb = skb;
descr->data_status = 0;
descr->next_descr_addr = 0; /* terminate hw descr */
gelic_descr_set_tx_cmdstat(descr, skb);
/* bump free descriptor pointer */
card->tx_chain.head = descr->next;
return 0;
}
/**
* gelic_card_kick_txdma - enables TX DMA processing
* @card: card structure
* @descr: descriptor address to enable TX processing at
*
*/
static int gelic_card_kick_txdma(struct gelic_card *card,
struct gelic_descr *descr)
{
int status = 0;
if (card->tx_dma_progress)
return 0;
if (gelic_descr_get_status(descr) == GELIC_DESCR_DMA_CARDOWNED) {
card->tx_dma_progress = 1;
status = lv1_net_start_tx_dma(bus_id(card), dev_id(card),
descr->bus_addr, 0);
if (status) {
card->tx_dma_progress = 0;
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
*/
int gelic_net_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct gelic_card *card = netdev_card(netdev);
struct gelic_descr *descr;
int result;
unsigned long flags;
spin_lock_irqsave(&card->tx_lock, flags);
gelic_card_release_tx_chain(card, 0);
descr = gelic_card_get_next_tx_descr(card);
if (!descr) {
/*
* no more descriptors free
*/
gelic_card_stop_queues(card);
spin_unlock_irqrestore(&card->tx_lock, flags);
return NETDEV_TX_BUSY;
}
result = gelic_descr_prepare_tx(card, descr, skb);
if (result) {
/*
* DMA map failed. As chances are that failure
* would continue, just release skb and return
*/
netdev->stats.tx_dropped++;
dev_kfree_skb_any(skb);
spin_unlock_irqrestore(&card->tx_lock, flags);
return NETDEV_TX_OK;
}
/*
* link this prepared descriptor to previous one
* to achieve high performance
*/
descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
/*
* as hardware descriptor is modified in the above lines,
* ensure that the hardware sees it
*/
wmb();
if (gelic_card_kick_txdma(card, descr)) {
/*
* kick failed.
* release descriptor which was just prepared
*/
netdev->stats.tx_dropped++;
/* don't trigger BUG_ON() in gelic_descr_release_tx */
descr->data_status = cpu_to_be32(GELIC_DESCR_TX_TAIL);
gelic_descr_release_tx(card, descr);
/* reset head */
card->tx_chain.head = descr;
/* reset hw termination */
descr->prev->next_descr_addr = 0;
dev_info(ctodev(card), "%s: kick failure\n", __func__);
}
spin_unlock_irqrestore(&card->tx_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
* @netdev: net_device structure to be passed packet
*
* 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_descr *descr,
struct gelic_card *card,
struct net_device *netdev)
{
struct sk_buff *skb = descr->skb;
u32 data_status, data_error;
data_status = be32_to_cpu(descr->data_status);
data_error = be32_to_cpu(descr->data_error);
/* unmap skb buffer */
dma_unmap_single(ctodev(card), be32_to_cpu(descr->buf_addr),
GELIC_NET_MAX_MTU,
DMA_FROM_DEVICE);
skb_put(skb, be32_to_cpu(descr->valid_size)?
be32_to_cpu(descr->valid_size) :
be32_to_cpu(descr->result_size));
if (!descr->valid_size)
dev_info(ctodev(card), "buffer full %x %x %x\n",
be32_to_cpu(descr->result_size),
be32_to_cpu(descr->buf_size),
be32_to_cpu(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 (netdev->features & NETIF_F_RXCSUM) {
if ((data_status & GELIC_DESCR_DATA_STATUS_CHK_MASK) &&
(!(data_error & GELIC_DESCR_DATA_ERROR_CHK_MASK)))
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb_checksum_none_assert(skb);
} else
skb_checksum_none_assert(skb);
/* update netdevice statistics */
netdev->stats.rx_packets++;
netdev->stats.rx_bytes += skb->len;
/* pass skb up to stack */
netif_receive_skb(skb);
}
/**
* gelic_card_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_card_decode_one_descr(struct gelic_card *card)
{
enum gelic_descr_dma_status status;
struct gelic_descr_chain *chain = &card->rx_chain;
struct gelic_descr *descr = chain->head;
struct net_device *netdev = NULL;
int dmac_chain_ended;
status = gelic_descr_get_status(descr);
if (status == GELIC_DESCR_DMA_CARDOWNED)
return 0;
if (status == GELIC_DESCR_DMA_NOT_IN_USE) {
dev_dbg(ctodev(card), "dormant descr? %p\n", descr);
return 0;
}
/* netdevice select */
if (card->vlan_required) {
unsigned int i;
u16 vid;
vid = *(u16 *)(descr->skb->data) & VLAN_VID_MASK;
for (i = 0; i < GELIC_PORT_MAX; i++) {
if (card->vlan[i].rx == vid) {
netdev = card->netdev[i];
break;
}
}
if (GELIC_PORT_MAX <= i) {
pr_info("%s: unknown packet vid=%x\n", __func__, vid);
goto refill;
}
} else
netdev = card->netdev[GELIC_PORT_ETHERNET_0];
if ((status == GELIC_DESCR_DMA_RESPONSE_ERROR) ||
(status == GELIC_DESCR_DMA_PROTECTION_ERROR) ||
(status == GELIC_DESCR_DMA_FORCE_END)) {
dev_info(ctodev(card), "dropping RX descriptor with state %x\n",
status);
netdev->stats.rx_dropped++;
goto refill;
}
if (status == GELIC_DESCR_DMA_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;
}
/*
* descriptors any other than FRAME_END here should
* be treated as error.
*/
if (status != GELIC_DESCR_DMA_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, netdev);
refill:
/* is the current descriptor terminated with next_descr == NULL? */
dmac_chain_ended =
be32_to_cpu(descr->dmac_cmd_status) &
GELIC_DESCR_RX_DMA_CHAIN_END;
/*
* 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_descr_set_status(descr, GELIC_DESCR_DMA_NOT_IN_USE);
/*
* this call can fail, but for now, just leave this
* decriptor without skb
*/
gelic_descr_prepare_rx(card, descr);
chain->tail = descr;
chain->head = descr->next;
/*
* Set this descriptor the end of the chain.
*/
descr->prev->next_descr_addr = cpu_to_be32(descr->bus_addr);
/*
* If dmac chain was met, DMAC stopped.
* thus re-enable it
*/
if (dmac_chain_ended)
gelic_card_enable_rxdmac(card);
return 1;
}
/**
* gelic_net_poll - NAPI poll function called by the stack to return packets
* @napi: napi structure
* @budget: number of packets we can pass to the stack at most
*
* returns the number of the processed packets
*
*/
static int gelic_net_poll(struct napi_struct *napi, int budget)
{
struct gelic_card *card = container_of(napi, struct gelic_card, napi);
int packets_done = 0;
while (packets_done < budget) {
if (!gelic_card_decode_one_descr(card))
break;
packets_done++;
}
if (packets_done < budget) {
napi_complete(napi);
gelic_card_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
*/
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_card_interrupt - event handler for gelic_net
*/
static irqreturn_t gelic_card_interrupt(int irq, void *ptr)
{
unsigned long flags;
struct gelic_card *card = ptr;
u64 status;
status = card->irq_status;
if (!status)
return IRQ_NONE;
status &= card->irq_mask;
if (status & GELIC_CARD_RXINT) {
gelic_card_rx_irq_off(card);
napi_schedule(&card->napi);
}
if (status & GELIC_CARD_TXINT) {
spin_lock_irqsave(&card->tx_lock, flags);
card->tx_dma_progress = 0;
gelic_card_release_tx_chain(card, 0);
/* kick outstanding tx descriptor if any */
gelic_card_kick_txdma(card, card->tx_chain.tail);
spin_unlock_irqrestore(&card->tx_lock, flags);
}
/* ether port status changed */
if (status & GELIC_CARD_PORT_STATUS_CHANGED)
gelic_card_get_ether_port_status(card, 1);
#ifdef CONFIG_GELIC_WIRELESS
if (status & (GELIC_CARD_WLAN_EVENT_RECEIVED |
GELIC_CARD_WLAN_COMMAND_COMPLETED))
gelic_wl_interrupt(card->netdev[GELIC_PORT_WIRELESS], status);
#endif
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
*/
void gelic_net_poll_controller(struct net_device *netdev)
{
struct gelic_card *card = netdev_card(netdev);
gelic_card_set_irq_mask(card, 0);
gelic_card_interrupt(netdev->irq, netdev);
gelic_card_set_irq_mask(card, card->irq_mask);
}
#endif /* CONFIG_NET_POLL_CONTROLLER */
/**
* gelic_net_open - called upon ifconfig 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
*/
int gelic_net_open(struct net_device *netdev)
{
struct gelic_card *card = netdev_card(netdev);
dev_dbg(ctodev(card), " -> %s %p\n", __func__, netdev);
gelic_card_up(card);
netif_start_queue(netdev);
gelic_card_get_ether_port_status(card, 1);
dev_dbg(ctodev(card), " <- %s\n", __func__);
return 0;
}
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_ether_get_settings(struct net_device *netdev,
struct ethtool_cmd *cmd)
{
struct gelic_card *card = netdev_card(netdev);
gelic_card_get_ether_port_status(card, 0);
if (card->ether_port_status & GELIC_LV1_ETHER_FULL_DUPLEX)
cmd->duplex = DUPLEX_FULL;
else
cmd->duplex = DUPLEX_HALF;
switch (card->ether_port_status & GELIC_LV1_ETHER_SPEED_MASK) {
case GELIC_LV1_ETHER_SPEED_10:
ethtool_cmd_speed_set(cmd, SPEED_10);
break;
case GELIC_LV1_ETHER_SPEED_100:
ethtool_cmd_speed_set(cmd, SPEED_100);
break;
case GELIC_LV1_ETHER_SPEED_1000:
ethtool_cmd_speed_set(cmd, SPEED_1000);
break;
default:
pr_info("%s: speed unknown\n", __func__);
ethtool_cmd_speed_set(cmd, SPEED_10);
break;
}
cmd->supported = SUPPORTED_TP | SUPPORTED_Autoneg |
SUPPORTED_10baseT_Half | SUPPORTED_10baseT_Full |
SUPPORTED_100baseT_Half | SUPPORTED_100baseT_Full |
SUPPORTED_1000baseT_Full;
cmd->advertising = cmd->supported;
if (card->link_mode & GELIC_LV1_ETHER_AUTO_NEG) {
cmd->autoneg = AUTONEG_ENABLE;
} else {
cmd->autoneg = AUTONEG_DISABLE;
cmd->advertising &= ~ADVERTISED_Autoneg;
}
cmd->port = PORT_TP;
return 0;
}
static int gelic_ether_set_settings(struct net_device *netdev,
struct ethtool_cmd *cmd)
{
struct gelic_card *card = netdev_card(netdev);
u64 mode;
int ret;
if (cmd->autoneg == AUTONEG_ENABLE) {
mode = GELIC_LV1_ETHER_AUTO_NEG;
} else {
switch (cmd->speed) {
case SPEED_10:
mode = GELIC_LV1_ETHER_SPEED_10;
break;
case SPEED_100:
mode = GELIC_LV1_ETHER_SPEED_100;
break;
case SPEED_1000:
mode = GELIC_LV1_ETHER_SPEED_1000;
break;
default:
return -EINVAL;
}
if (cmd->duplex == DUPLEX_FULL)
mode |= GELIC_LV1_ETHER_FULL_DUPLEX;
else if (cmd->speed == SPEED_1000) {
pr_info("1000 half duplex is not supported.\n");
return -EINVAL;
}
}
ret = gelic_card_set_link_mode(card, mode);
if (ret)
return ret;
return 0;
}
static void gelic_net_get_wol(struct net_device *netdev,
struct ethtool_wolinfo *wol)
{
if (0 <= ps3_compare_firmware_version(2, 2, 0))
wol->supported = WAKE_MAGIC;
else
wol->supported = 0;
wol->wolopts = ps3_sys_manager_get_wol() ? wol->supported : 0;
memset(&wol->sopass, 0, sizeof(wol->sopass));
}
static int gelic_net_set_wol(struct net_device *netdev,
struct ethtool_wolinfo *wol)
{
int status;
struct gelic_card *card;
u64 v1, v2;
if (ps3_compare_firmware_version(2, 2, 0) < 0 ||
!capable(CAP_NET_ADMIN))
return -EPERM;
if (wol->wolopts & ~WAKE_MAGIC)
return -EINVAL;
card = netdev_card(netdev);
if (wol->wolopts & WAKE_MAGIC) {
status = lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_SET_WOL,
GELIC_LV1_WOL_MAGIC_PACKET,
0, GELIC_LV1_WOL_MP_ENABLE,
&v1, &v2);
if (status) {
pr_info("%s: enabling WOL failed %d\n", __func__,
status);
status = -EIO;
goto done;
}
status = lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_SET_WOL,
GELIC_LV1_WOL_ADD_MATCH_ADDR,
0, GELIC_LV1_WOL_MATCH_ALL,
&v1, &v2);
if (!status)
ps3_sys_manager_set_wol(1);
else {
pr_info("%s: enabling WOL filter failed %d\n",
__func__, status);
status = -EIO;
}
} else {
status = lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_SET_WOL,
GELIC_LV1_WOL_MAGIC_PACKET,
0, GELIC_LV1_WOL_MP_DISABLE,
&v1, &v2);
if (status) {
pr_info("%s: disabling WOL failed %d\n", __func__,
status);
status = -EIO;
goto done;
}
status = lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_SET_WOL,
GELIC_LV1_WOL_DELETE_MATCH_ADDR,
0, GELIC_LV1_WOL_MATCH_ALL,
&v1, &v2);
if (!status)
ps3_sys_manager_set_wol(0);
else {
pr_info("%s: removing WOL filter failed %d\n",
__func__, status);
status = -EIO;
}
}
done:
return status;
}
static const struct ethtool_ops gelic_ether_ethtool_ops = {
.get_drvinfo = gelic_net_get_drvinfo,
.get_settings = gelic_ether_get_settings,
.set_settings = gelic_ether_set_settings,
.get_link = ethtool_op_get_link,
.get_wol = gelic_net_get_wol,
.set_wol = gelic_net_set_wol,
};
/**
* 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_card *card =
container_of(work, struct gelic_card, tx_timeout_task);
struct net_device *netdev = card->netdev[GELIC_PORT_ETHERNET_0];
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
*/
void gelic_net_tx_timeout(struct net_device *netdev)
{
struct gelic_card *card;
card = netdev_card(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);
}
static const struct net_device_ops gelic_netdevice_ops = {
.ndo_open = gelic_net_open,
.ndo_stop = gelic_net_stop,
.ndo_start_xmit = gelic_net_xmit,
.ndo_set_multicast_list = gelic_net_set_multi,
.ndo_change_mtu = gelic_net_change_mtu,
.ndo_tx_timeout = gelic_net_tx_timeout,
.ndo_set_mac_address = eth_mac_addr,
.ndo_validate_addr = eth_validate_addr,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_poll_controller = gelic_net_poll_controller,
#endif
};
/**
* gelic_ether_setup_netdev_ops - initialization of net_device operations
* @netdev: net_device structure
*
* fills out function pointers in the net_device structure
*/
static void __devinit gelic_ether_setup_netdev_ops(struct net_device *netdev,
struct napi_struct *napi)
{
netdev->watchdog_timeo = GELIC_NET_WATCHDOG_TIMEOUT;
/* NAPI */
netif_napi_add(netdev, napi,
gelic_net_poll, GELIC_NET_NAPI_WEIGHT);
netdev->ethtool_ops = &gelic_ether_ethtool_ops;
netdev->netdev_ops = &gelic_netdevice_ops;
}
/**
* gelic_ether_setup_netdev - initialization of net_device
* @netdev: net_device structure
* @card: card structure
*
* Returns 0 on success or <0 on failure
*
* gelic_ether_setup_netdev initializes the net_device structure
* and register it.
**/
int __devinit gelic_net_setup_netdev(struct net_device *netdev,
struct gelic_card *card)
{
int status;
u64 v1, v2;
netdev->hw_features = NETIF_F_IP_CSUM | NETIF_F_RXCSUM;
netdev->features = NETIF_F_IP_CSUM;
if (GELIC_CARD_RX_CSUM_DEFAULT)
netdev->features |= NETIF_F_RXCSUM;
status = lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_GET_MAC_ADDRESS,
0, 0, 0, &v1, &v2);
v1 <<= 16;
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;
}
memcpy(netdev->dev_addr, &v1, ETH_ALEN);
if (card->vlan_required) {
netdev->hard_header_len += VLAN_HLEN;
/*
* As vlan is internally used,
* we can not receive vlan packets
*/
netdev->features |= NETIF_F_VLAN_CHALLENGED;
}
status = register_netdev(netdev);
if (status) {
dev_err(ctodev(card), "%s:Couldn't register %s %d\n",
__func__, netdev->name, status);
return status;
}
dev_info(ctodev(card), "%s: MAC addr %pM\n",
netdev->name, netdev->dev_addr);
return 0;
}
/**
* gelic_alloc_card_net - 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
*/
#define GELIC_ALIGN (32)
static struct gelic_card * __devinit gelic_alloc_card_net(struct net_device **netdev)
{
struct gelic_card *card;
struct gelic_port *port;
void *p;
size_t alloc_size;
/*
* gelic requires dma descriptor is 32 bytes aligned and
* the hypervisor requires irq_status is 8 bytes aligned.
*/
BUILD_BUG_ON(offsetof(struct gelic_card, irq_status) % 8);
BUILD_BUG_ON(offsetof(struct gelic_card, descr) % 32);
alloc_size =
sizeof(struct gelic_card) +
sizeof(struct gelic_descr) * GELIC_NET_RX_DESCRIPTORS +
sizeof(struct gelic_descr) * GELIC_NET_TX_DESCRIPTORS +
GELIC_ALIGN - 1;
p = kzalloc(alloc_size, GFP_KERNEL);
if (!p)
return NULL;
card = PTR_ALIGN(p, GELIC_ALIGN);
card->unalign = p;
/*
* alloc netdev
*/
*netdev = alloc_etherdev(sizeof(struct gelic_port));
if (!netdev) {
kfree(card->unalign);
return NULL;
}
port = netdev_priv(*netdev);
/* gelic_port */
port->netdev = *netdev;
port->card = card;
port->type = GELIC_PORT_ETHERNET_0;
/* gelic_card */
card->netdev[GELIC_PORT_ETHERNET_0] = *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);
mutex_init(&card->updown_lock);
atomic_set(&card->users, 0);
return card;
}
static void __devinit gelic_card_get_vlan_info(struct gelic_card *card)
{
u64 v1, v2;
int status;
unsigned int i;
struct {
int tx;
int rx;
} vlan_id_ix[2] = {
[GELIC_PORT_ETHERNET_0] = {
.tx = GELIC_LV1_VLAN_TX_ETHERNET_0,
.rx = GELIC_LV1_VLAN_RX_ETHERNET_0
},
[GELIC_PORT_WIRELESS] = {
.tx = GELIC_LV1_VLAN_TX_WIRELESS,
.rx = GELIC_LV1_VLAN_RX_WIRELESS
}
};
for (i = 0; i < ARRAY_SIZE(vlan_id_ix); i++) {
/* tx tag */
status = lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_GET_VLAN_ID,
vlan_id_ix[i].tx,
0, 0, &v1, &v2);
if (status || !v1) {
if (status != LV1_NO_ENTRY)
dev_dbg(ctodev(card),
"get vlan id for tx(%d) failed(%d)\n",
vlan_id_ix[i].tx, status);
card->vlan[i].tx = 0;
card->vlan[i].rx = 0;
continue;
}
card->vlan[i].tx = (u16)v1;
/* rx tag */
status = lv1_net_control(bus_id(card), dev_id(card),
GELIC_LV1_GET_VLAN_ID,
vlan_id_ix[i].rx,
0, 0, &v1, &v2);
if (status || !v1) {
if (status != LV1_NO_ENTRY)
dev_info(ctodev(card),
"get vlan id for rx(%d) failed(%d)\n",
vlan_id_ix[i].rx, status);
card->vlan[i].tx = 0;
card->vlan[i].rx = 0;
continue;
}
card->vlan[i].rx = (u16)v1;
dev_dbg(ctodev(card), "vlan_id[%d] tx=%02x rx=%02x\n",
i, card->vlan[i].tx, card->vlan[i].rx);
}
if (card->vlan[GELIC_PORT_ETHERNET_0].tx) {
BUG_ON(!card->vlan[GELIC_PORT_WIRELESS].tx);
card->vlan_required = 1;
} else
card->vlan_required = 0;
/* check wirelss capable firmware */
if (ps3_compare_firmware_version(1, 6, 0) < 0) {
card->vlan[GELIC_PORT_WIRELESS].tx = 0;
card->vlan[GELIC_PORT_WIRELESS].rx = 0;
}
dev_info(ctodev(card), "internal vlan %s\n",
card->vlan_required? "enabled" : "disabled");
}
/**
* ps3_gelic_driver_probe - add a device to the control of this driver
*/
static int __devinit ps3_gelic_driver_probe(struct ps3_system_bus_device *dev)
{
struct gelic_card *card;
struct net_device *netdev;
int result;
pr_debug("%s: called\n", __func__);
result = ps3_open_hv_device(dev);
if (result) {
dev_dbg(&dev->core, "%s:ps3_open_hv_device failed\n",
__func__);
goto fail_open;
}
result = ps3_dma_region_create(dev->d_region);
if (result) {
dev_dbg(&dev->core, "%s:ps3_dma_region_create failed(%d)\n",
__func__, result);
BUG_ON("check region type");
goto fail_dma_region;
}
/* alloc card/netdevice */
card = gelic_alloc_card_net(&netdev);
if (!card) {
dev_info(&dev->core, "%s:gelic_net_alloc_card failed\n",
__func__);
result = -ENOMEM;
goto fail_alloc_card;
}
ps3_system_bus_set_drvdata(dev, card);
card->dev = dev;
/* get internal vlan info */
gelic_card_get_vlan_info(card);
card->link_mode = GELIC_LV1_ETHER_AUTO_NEG;
/* setup interrupt */
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,
"%s:set_interrupt_status_indicator failed: %s\n",
__func__, ps3_result(result));
result = -EIO;
goto fail_status_indicator;
}
result = ps3_sb_event_receive_port_setup(dev, PS3_BINDING_CPU_ANY,
&card->irq);
if (result) {
dev_info(ctodev(card),
"%s:gelic_net_open_device failed (%d)\n",
__func__, result);
result = -EPERM;
goto fail_alloc_irq;
}
result = request_irq(card->irq, gelic_card_interrupt,
IRQF_DISABLED, netdev->name, card);
if (result) {
dev_info(ctodev(card), "%s:request_irq failed (%d)\n",
__func__, result);
goto fail_request_irq;
}
/* setup card structure */
card->irq_mask = GELIC_CARD_RXINT | GELIC_CARD_TXINT |
GELIC_CARD_PORT_STATUS_CHANGED;
if (gelic_card_init_chain(card, &card->tx_chain,
card->descr, GELIC_NET_TX_DESCRIPTORS))
goto fail_alloc_tx;
if (gelic_card_init_chain(card, &card->rx_chain,
card->descr + GELIC_NET_TX_DESCRIPTORS,
GELIC_NET_RX_DESCRIPTORS))
goto fail_alloc_rx;
/* 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_descr),
GELIC_NET_RX_DESCRIPTORS);
/* allocate rx skbs */
if (gelic_card_alloc_rx_skbs(card))
goto fail_alloc_skbs;
spin_lock_init(&card->tx_lock);
card->tx_dma_progress = 0;
/* setup net_device structure */
netdev->irq = card->irq;
SET_NETDEV_DEV(netdev, &card->dev->core);
gelic_ether_setup_netdev_ops(netdev, &card->napi);
result = gelic_net_setup_netdev(netdev, card);
if (result) {
dev_dbg(&dev->core, "%s: setup_netdev failed %d",
__func__, result);
goto fail_setup_netdev;
}
#ifdef CONFIG_GELIC_WIRELESS
if (gelic_wl_driver_probe(card)) {
dev_dbg(&dev->core, "%s: WL init failed\n", __func__);
goto fail_setup_netdev;
}
#endif
pr_debug("%s: done\n", __func__);
return 0;
fail_setup_netdev:
fail_alloc_skbs:
gelic_card_free_chain(card, card->rx_chain.head);
fail_alloc_rx:
gelic_card_free_chain(card, card->tx_chain.head);
fail_alloc_tx:
free_irq(card->irq, card);
netdev->irq = NO_IRQ;
fail_request_irq:
ps3_sb_event_receive_port_destroy(dev, card->irq);
fail_alloc_irq:
lv1_net_set_interrupt_status_indicator(bus_id(card),
bus_id(card),
0, 0);
fail_status_indicator:
ps3_system_bus_set_drvdata(dev, NULL);
kfree(netdev_card(netdev)->unalign);
free_netdev(netdev);
fail_alloc_card:
ps3_dma_region_free(dev->d_region);
fail_dma_region:
ps3_close_hv_device(dev);
fail_open:
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_card *card = ps3_system_bus_get_drvdata(dev);
struct net_device *netdev0;
pr_debug("%s: called\n", __func__);
/* set auto-negotiation */
gelic_card_set_link_mode(card, GELIC_LV1_ETHER_AUTO_NEG);
#ifdef CONFIG_GELIC_WIRELESS
gelic_wl_driver_remove(card);
#endif
/* stop interrupt */
gelic_card_set_irq_mask(card, 0);
/* turn off DMA, force end */
gelic_card_disable_rxdmac(card);
gelic_card_disable_txdmac(card);
/* release chains */
gelic_card_release_tx_chain(card, 1);
gelic_card_release_rx_chain(card);
gelic_card_free_chain(card, card->tx_top);
gelic_card_free_chain(card, card->rx_top);
netdev0 = card->netdev[GELIC_PORT_ETHERNET_0];
/* disconnect event port */
free_irq(card->irq, card);
netdev0->irq = NO_IRQ;
ps3_sb_event_receive_port_destroy(card->dev, card->irq);
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(netdev0);
kfree(netdev_card(netdev0)->unalign);
free_netdev(netdev0);
ps3_system_bus_set_drvdata(dev, NULL);
ps3_dma_region_free(dev->d_region);
ps3_close_hv_device(dev);
pr_debug("%s: done\n", __func__);
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);
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