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Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6

Browse Source 
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6:
  [PATCH] spidernet: rework tx queue handling
  [PATCH] spidernet: bug fix for init code
  [PATCH] sky2: NAPI poll fix
  [NET] ethtool: fix oops by testing correct struct member
  e1000: bump version to 7.1.9-k4
  e1000: fix panic on large frame receive when mtu=default
  e1000: remove CRC bytes from measured packet length
  e1000: Redo netpoll fix to address community concerns
This commit is contained in:
Linus Torvalds 2006-07-21 12:03:32 -07:00
commit 3bda2418b9
6 changed files with 310 additions and 413 deletions
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3
drivers/net/e1000/e1000.h
View File

@ -110,6 +110,9 @@ struct e1000_adapter;
#define E1000_MIN_RXD 80
#define E1000_MAX_82544_RXD 4096
/* this is the size past which hardware will drop packets when setting LPE=0 */
#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
/* Supported Rx Buffer Sizes */
#define E1000_RXBUFFER_128 128 /* Used for packet split */
#define E1000_RXBUFFER_256 256 /* Used for packet split */

52
drivers/net/e1000/e1000_main.c
View File

@ -36,7 +36,7 @@ static char e1000_driver_string[] = "Intel(R) PRO/1000 Network Driver";
#else
#define DRIVERNAPI "-NAPI"
#endif
#define DRV_VERSION "7.1.9-k2"DRIVERNAPI
#define DRV_VERSION "7.1.9-k4"DRIVERNAPI
char e1000_driver_version[] = DRV_VERSION;
static char e1000_copyright[] = "Copyright (c) 1999-2006 Intel Corporation.";
@ -1068,7 +1068,7 @@ e1000_sw_init(struct e1000_adapter *adapter)
pci_read_config_word(pdev, PCI_COMMAND, &hw->pci_cmd_word);
adapter->rx_buffer_len = MAXIMUM_ETHERNET_FRAME_SIZE;
adapter->rx_buffer_len = MAXIMUM_ETHERNET_VLAN_SIZE;
adapter->rx_ps_bsize0 = E1000_RXBUFFER_128;
hw->max_frame_size = netdev->mtu +
ENET_HEADER_SIZE + ETHERNET_FCS_SIZE;
@ -3148,7 +3148,6 @@ e1000_change_mtu(struct net_device *netdev, int new_mtu)
adapter->rx_buffer_len = E1000_RXBUFFER_16384;
/* adjust allocation if LPE protects us, and we aren't using SBP */
#define MAXIMUM_ETHERNET_VLAN_SIZE 1522
if (!adapter->hw.tbi_compatibility_on &&
((max_frame == MAXIMUM_ETHERNET_FRAME_SIZE) ||
(max_frame == MAXIMUM_ETHERNET_VLAN_SIZE)))
@ -3387,8 +3386,8 @@ e1000_intr(int irq, void *data, struct pt_regs *regs)
E1000_WRITE_REG(hw, IMC, ~0);
E1000_WRITE_FLUSH(hw);
}
if (likely(netif_rx_schedule_prep(&adapter->polling_netdev[0])))
__netif_rx_schedule(&adapter->polling_netdev[0]);
if (likely(netif_rx_schedule_prep(netdev)))
__netif_rx_schedule(netdev);
else
e1000_irq_enable(adapter);
#else
@ -3431,34 +3430,26 @@ e1000_clean(struct net_device *poll_dev, int *budget)
{
struct e1000_adapter *adapter;
int work_to_do = min(*budget, poll_dev->quota);
int tx_cleaned = 0, i = 0, work_done = 0;
int tx_cleaned = 0, work_done = 0;
/* Must NOT use netdev_priv macro here. */
adapter = poll_dev->priv;
/* Keep link state information with original netdev */
if (!netif_carrier_ok(adapter->netdev))
if (!netif_carrier_ok(poll_dev))
goto quit_polling;
while (poll_dev != &adapter->polling_netdev[i]) {
i++;
BUG_ON(i == adapter->num_rx_queues);
/* e1000_clean is called per-cpu. This lock protects
* tx_ring[0] from being cleaned by multiple cpus
* simultaneously. A failure obtaining the lock means
* tx_ring[0] is currently being cleaned anyway. */
if (spin_trylock(&adapter->tx_queue_lock)) {
tx_cleaned = e1000_clean_tx_irq(adapter,
&adapter->tx_ring[0]);
spin_unlock(&adapter->tx_queue_lock);
}
if (likely(adapter->num_tx_queues == 1)) {
/* e1000_clean is called per-cpu. This lock protects
* tx_ring[0] from being cleaned by multiple cpus
* simultaneously. A failure obtaining the lock means
* tx_ring[0] is currently being cleaned anyway. */
if (spin_trylock(&adapter->tx_queue_lock)) {
tx_cleaned = e1000_clean_tx_irq(adapter,
&adapter->tx_ring[0]);
spin_unlock(&adapter->tx_queue_lock);
}
} else
tx_cleaned = e1000_clean_tx_irq(adapter, &adapter->tx_ring[i]);
adapter->clean_rx(adapter, &adapter->rx_ring[i],
adapter->clean_rx(adapter, &adapter->rx_ring[0],
&work_done, work_to_do);
*budget -= work_done;
@ -3466,7 +3457,7 @@ e1000_clean(struct net_device *poll_dev, int *budget)
/* If no Tx and not enough Rx work done, exit the polling mode */
if ((!tx_cleaned && (work_done == 0)) ||
!netif_running(adapter->netdev)) {
!netif_running(poll_dev)) {
quit_polling:
netif_rx_complete(poll_dev);
e1000_irq_enable(adapter);
@ -3681,6 +3672,9 @@ e1000_clean_rx_irq(struct e1000_adapter *adapter,
length = le16_to_cpu(rx_desc->length);
/* adjust length to remove Ethernet CRC */
length -= 4;
if (unlikely(!(status & E1000_RXD_STAT_EOP))) {
/* All receives must fit into a single buffer */
E1000_DBG("%s: Receive packet consumed multiple"
@ -3885,8 +3879,9 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
pci_dma_sync_single_for_device(pdev,
ps_page_dma->ps_page_dma[0],
PAGE_SIZE, PCI_DMA_FROMDEVICE);
/* remove the CRC */
l1 -= 4;
skb_put(skb, l1);
length += l1;
goto copydone;
} /* if */
}
@ -3905,6 +3900,10 @@ e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
skb->truesize += length;
}
/* strip the ethernet crc, problem is we're using pages now so
* this whole operation can get a little cpu intensive */
pskb_trim(skb, skb->len - 4);
copydone:
e1000_rx_checksum(adapter, staterr,
le16_to_cpu(rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
@ -4752,6 +4751,7 @@ static void
e1000_netpoll(struct net_device *netdev)
{
struct e1000_adapter *adapter = netdev_priv(netdev);
disable_irq(adapter->pdev->irq);
e1000_intr(adapter->pdev->irq, netdev, NULL);
e1000_clean_tx_irq(adapter, adapter->tx_ring);

7
drivers/net/sky2.c
View File

@ -50,7 +50,7 @@
#include "sky2.h"
#define DRV_NAME "sky2"
#define DRV_VERSION "1.4"
#define DRV_VERSION "1.5"
#define PFX DRV_NAME " "
/*
@ -2204,9 +2204,6 @@ static int sky2_poll(struct net_device *dev0, int *budget)
int work_done = 0;
u32 status = sky2_read32(hw, B0_Y2_SP_EISR);
if (!~status)
goto out;
if (status & Y2_IS_HW_ERR)
sky2_hw_intr(hw);
@ -2243,7 +2240,7 @@ static int sky2_poll(struct net_device *dev0, int *budget)
if (sky2_more_work(hw))
return 1;
out:
netif_rx_complete(dev0);
sky2_read32(hw, B0_Y2_SP_LISR);

588
drivers/net/spider_net.c
View File

@ -84,7 +84,7 @@ MODULE_DEVICE_TABLE(pci, spider_net_pci_tbl);
*
* returns the content of the specified SMMIO register.
*/
static u32
static inline u32
spider_net_read_reg(struct spider_net_card *card, u32 reg)
{
u32 value;
@ -101,7 +101,7 @@ spider_net_read_reg(struct spider_net_card *card, u32 reg)
* @reg: register to write to
* @value: value to write into the specified SMMIO register
*/
static void
static inline void
spider_net_write_reg(struct spider_net_card *card, u32 reg, u32 value)
{
value = cpu_to_le32(value);
@ -259,39 +259,10 @@ spider_net_get_mac_address(struct net_device *netdev)
*
* returns the status as in the dmac_cmd_status field of the descriptor
*/
static enum spider_net_descr_status
static inline int
spider_net_get_descr_status(struct spider_net_descr *descr)
{
u32 cmd_status;
cmd_status = descr->dmac_cmd_status;
cmd_status >>= SPIDER_NET_DESCR_IND_PROC_SHIFT;
/* no need to mask out any bits, as cmd_status is 32 bits wide only
* (and unsigned) */
return cmd_status;
}
/**
* spider_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
spider_net_set_descr_status(struct spider_net_descr *descr,
enum spider_net_descr_status status)
{
u32 cmd_status;
/* read the status */
cmd_status = descr->dmac_cmd_status;
/* clean the upper 4 bits */
cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO;
/* add the status to it */
cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT;
/* and write it back */
descr->dmac_cmd_status = cmd_status;
return descr->dmac_cmd_status & SPIDER_NET_DESCR_IND_PROC_MASK;
}
/**
@ -328,24 +299,23 @@ spider_net_free_chain(struct spider_net_card *card,
static int
spider_net_init_chain(struct spider_net_card *card,
struct spider_net_descr_chain *chain,
struct spider_net_descr *start_descr, int no)
struct spider_net_descr *start_descr,
int direction, int no)
{
int i;
struct spider_net_descr *descr;
dma_addr_t buf;
atomic_set(&card->rx_chain_refill,0);
descr = start_descr;
memset(descr, 0, sizeof(*descr) * no);
/* set up the hardware pointers in each descriptor */
for (i=0; i<no; i++, descr++) {
spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
buf = pci_map_single(card->pdev, descr,
SPIDER_NET_DESCR_SIZE,
PCI_DMA_BIDIRECTIONAL);
direction);
if (buf == DMA_ERROR_CODE)
goto iommu_error;
@ -360,10 +330,11 @@ spider_net_init_chain(struct spider_net_card *card,
start_descr->prev = descr-1;
descr = start_descr;
for (i=0; i < no; i++, descr++) {
descr->next_descr_addr = descr->next->bus_addr;
}
if (direction == PCI_DMA_FROMDEVICE)
for (i=0; i < no; i++, descr++)
descr->next_descr_addr = descr->next->bus_addr;
spin_lock_init(&chain->lock);
chain->head = start_descr;
chain->tail = start_descr;
@ -375,7 +346,7 @@ spider_net_init_chain(struct spider_net_card *card,
if (descr->bus_addr)
pci_unmap_single(card->pdev, descr->bus_addr,
SPIDER_NET_DESCR_SIZE,
PCI_DMA_BIDIRECTIONAL);
direction);
return -ENOMEM;
}
@ -396,7 +367,7 @@ spider_net_free_rx_chain_contents(struct spider_net_card *card)
dev_kfree_skb(descr->skb);
pci_unmap_single(card->pdev, descr->buf_addr,
SPIDER_NET_MAX_FRAME,
PCI_DMA_BIDIRECTIONAL);
PCI_DMA_FROMDEVICE);
}
descr = descr->next;
}
@ -446,15 +417,16 @@ spider_net_prepare_rx_descr(struct spider_net_card *card,
skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
/* io-mmu-map the skb */
buf = pci_map_single(card->pdev, descr->skb->data,
SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL);
SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
descr->buf_addr = buf;
if (buf == DMA_ERROR_CODE) {
dev_kfree_skb_any(descr->skb);
if (netif_msg_rx_err(card) && net_ratelimit())
pr_err("Could not iommu-map rx buffer\n");
spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
} else {
descr->dmac_cmd_status = SPIDER_NET_DMAC_RX_CARDOWNED;
descr->dmac_cmd_status = SPIDER_NET_DESCR_CARDOWNED |
SPIDER_NET_DMAC_NOINTR_COMPLETE;
}
return error;
@ -468,7 +440,7 @@ spider_net_prepare_rx_descr(struct spider_net_card *card,
* chip by writing to the appropriate register. DMA is enabled in
* spider_net_enable_rxdmac.
*/
static void
static inline void
spider_net_enable_rxchtails(struct spider_net_card *card)
{
/* assume chain is aligned correctly */
@ -483,7 +455,7 @@ spider_net_enable_rxchtails(struct spider_net_card *card)
* spider_net_enable_rxdmac enables the DMA controller by setting RX_DMA_EN
* in the GDADMACCNTR register
*/
static void
static inline void
spider_net_enable_rxdmac(struct spider_net_card *card)
{
wmb();
@ -500,23 +472,24 @@ spider_net_enable_rxdmac(struct spider_net_card *card)
static void
spider_net_refill_rx_chain(struct spider_net_card *card)
{
struct spider_net_descr_chain *chain;
chain = &card->rx_chain;
struct spider_net_descr_chain *chain = &card->rx_chain;
unsigned long flags;
/* one context doing the refill (and a second context seeing that
* and omitting it) is ok. If called by NAPI, we'll be called again
* as spider_net_decode_one_descr is called several times. If some
* interrupt calls us, the NAPI is about to clean up anyway. */
if (atomic_inc_return(&card->rx_chain_refill) == 1)
while (spider_net_get_descr_status(chain->head) ==
SPIDER_NET_DESCR_NOT_IN_USE) {
if (spider_net_prepare_rx_descr(card, chain->head))
break;
chain->head = chain->head->next;
}
if (!spin_trylock_irqsave(&chain->lock, flags))
return;
atomic_dec(&card->rx_chain_refill);
while (spider_net_get_descr_status(chain->head) ==
SPIDER_NET_DESCR_NOT_IN_USE) {
if (spider_net_prepare_rx_descr(card, chain->head))
break;
chain->head = chain->head->next;
}
spin_unlock_irqrestore(&chain->lock, flags);
}
/**
@ -553,111 +526,6 @@ spider_net_alloc_rx_skbs(struct spider_net_card *card)
return result;
}
/**
* spider_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
spider_net_release_tx_descr(struct spider_net_card *card,
struct spider_net_descr *descr)
{
struct sk_buff *skb;
/* unmap the skb */
skb = descr->skb;
pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
PCI_DMA_BIDIRECTIONAL);
dev_kfree_skb_any(skb);
/* set status to not used */
spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
}
/**
* spider_net_release_tx_chain - processes sent tx descriptors
* @card: adapter structure
* @brutal: if set, don't care about whether descriptor seems to be in use
*
* returns 0 if the tx ring is empty, otherwise 1.
*
* spider_net_release_tx_chain releases the tx descriptors that spider has
* finished with (if non-brutal) or simply release tx descriptors (if brutal).
* If some other context is calling this function, we return 1 so that we're
* scheduled again (if we were scheduled) and will not loose initiative.
*/
static int
spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
{
struct spider_net_descr_chain *tx_chain = &card->tx_chain;
enum spider_net_descr_status status;
if (atomic_inc_return(&card->tx_chain_release) != 1) {
atomic_dec(&card->tx_chain_release);
return 1;
}
for (;;) {
status = spider_net_get_descr_status(tx_chain->tail);
switch (status) {
case SPIDER_NET_DESCR_CARDOWNED:
if (!brutal)
goto out;
/* fallthrough, if we release the descriptors
* brutally (then we don't care about
* SPIDER_NET_DESCR_CARDOWNED) */
case SPIDER_NET_DESCR_RESPONSE_ERROR:
case SPIDER_NET_DESCR_PROTECTION_ERROR:
case SPIDER_NET_DESCR_FORCE_END:
if (netif_msg_tx_err(card))
pr_err("%s: forcing end of tx descriptor "
"with status x%02x\n",
card->netdev->name, status);
card->netdev_stats.tx_dropped++;
break;
case SPIDER_NET_DESCR_COMPLETE:
card->netdev_stats.tx_packets++;
card->netdev_stats.tx_bytes +=
tx_chain->tail->skb->len;
break;
default: /* any other value (== SPIDER_NET_DESCR_NOT_IN_USE) */
goto out;
}
spider_net_release_tx_descr(card, tx_chain->tail);
tx_chain->tail = tx_chain->tail->next;
}
out:
atomic_dec(&card->tx_chain_release);
netif_wake_queue(card->netdev);
if (status == SPIDER_NET_DESCR_CARDOWNED)
return 1;
return 0;
}
/**
* spider_net_cleanup_tx_ring - cleans up the TX ring
* @card: card structure
*
* spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
* interrupts to cleanup our TX ring) and returns sent packets to the stack
* by freeing them
*/
static void
spider_net_cleanup_tx_ring(struct spider_net_card *card)
{
if ( (spider_net_release_tx_chain(card, 0)) &&
(card->netdev->flags & IFF_UP) ) {
mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
}
}
/**
* spider_net_get_multicast_hash - generates hash for multicast filter table
* @addr: multicast address
@ -760,97 +628,6 @@ spider_net_disable_rxdmac(struct spider_net_card *card)
SPIDER_NET_DMA_RX_FEND_VALUE);
}
/**
* spider_net_stop - called upon ifconfig down
* @netdev: interface device structure
*
* always returns 0
*/
int
spider_net_stop(struct net_device *netdev)
{
struct spider_net_card *card = netdev_priv(netdev);
tasklet_kill(&card->rxram_full_tl);
netif_poll_disable(netdev);
netif_carrier_off(netdev);
netif_stop_queue(netdev);
del_timer_sync(&card->tx_timer);
/* disable/mask all interrupts */
spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
/* free_irq(netdev->irq, netdev);*/
free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
SPIDER_NET_DMA_TX_FEND_VALUE);
/* turn off DMA, force end */
spider_net_disable_rxdmac(card);
/* release chains */
spider_net_release_tx_chain(card, 1);
spider_net_free_chain(card, &card->tx_chain);
spider_net_free_chain(card, &card->rx_chain);
return 0;
}
/**
* spider_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 spider_net_descr *
spider_net_get_next_tx_descr(struct spider_net_card *card)
{
/* check, if head points to not-in-use descr */
if ( spider_net_get_descr_status(card->tx_chain.head) ==
SPIDER_NET_DESCR_NOT_IN_USE ) {
return card->tx_chain.head;
} else {
return NULL;
}
}
/**
* spider_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.
*/
static void
spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr,
struct sk_buff *skb)
{
/* make sure the other fields in the descriptor are written */
wmb();
if (skb->ip_summed != CHECKSUM_HW) {
descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
return;
}
/* is packet ip?
* if yes: tcp? udp? */
if (skb->protocol == htons(ETH_P_IP)) {
if (skb->nh.iph->protocol == IPPROTO_TCP)
descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS;
else if (skb->nh.iph->protocol == IPPROTO_UDP)
descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_UDPCS;
else /* the stack should checksum non-tcp and non-udp
packets on his own: NETIF_F_IP_CSUM */
descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_NOCS;
}
}
/**
* spider_net_prepare_tx_descr - fill tx descriptor with skb data
* @card: card structure
@ -864,13 +641,12 @@ spider_net_set_txdescr_cmdstat(struct spider_net_descr *descr,
*/
static int
spider_net_prepare_tx_descr(struct spider_net_card *card,
struct spider_net_descr *descr,
struct sk_buff *skb)
{
struct spider_net_descr *descr = card->tx_chain.head;
dma_addr_t buf;
buf = pci_map_single(card->pdev, skb->data,
skb->len, PCI_DMA_BIDIRECTIONAL);
buf = pci_map_single(card->pdev, skb->data, skb->len, PCI_DMA_TODEVICE);
if (buf == DMA_ERROR_CODE) {
if (netif_msg_tx_err(card) && net_ratelimit())
pr_err("could not iommu-map packet (%p, %i). "
@ -880,10 +656,101 @@ spider_net_prepare_tx_descr(struct spider_net_card *card,
descr->buf_addr = buf;
descr->buf_size = skb->len;
descr->next_descr_addr = 0;
descr->skb = skb;
descr->data_status = 0;
spider_net_set_txdescr_cmdstat(descr,skb);
descr->dmac_cmd_status =
SPIDER_NET_DESCR_CARDOWNED | SPIDER_NET_DMAC_NOCS;
if (skb->protocol == htons(ETH_P_IP))
switch (skb->nh.iph->protocol) {
case IPPROTO_TCP:
descr->dmac_cmd_status |= SPIDER_NET_DMAC_TCP;
break;
case IPPROTO_UDP:
descr->dmac_cmd_status |= SPIDER_NET_DMAC_UDP;
break;
}
descr->prev->next_descr_addr = descr->bus_addr;
return 0;
}
/**
* spider_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 inline void
spider_net_release_tx_descr(struct spider_net_card *card)
{
struct spider_net_descr *descr = card->tx_chain.tail;
struct sk_buff *skb;
card->tx_chain.tail = card->tx_chain.tail->next;
descr->dmac_cmd_status |= SPIDER_NET_DESCR_NOT_IN_USE;
/* unmap the skb */
skb = descr->skb;
pci_unmap_single(card->pdev, descr->buf_addr, skb->len,
PCI_DMA_TODEVICE);
dev_kfree_skb_any(skb);
}
/**
* spider_net_release_tx_chain - processes sent tx descriptors
* @card: adapter structure
* @brutal: if set, don't care about whether descriptor seems to be in use
*
* returns 0 if the tx ring is empty, otherwise 1.
*
* spider_net_release_tx_chain releases the tx descriptors that spider has
* finished with (if non-brutal) or simply release tx descriptors (if brutal).
* If some other context is calling this function, we return 1 so that we're
* scheduled again (if we were scheduled) and will not loose initiative.
*/
static int
spider_net_release_tx_chain(struct spider_net_card *card, int brutal)
{
struct spider_net_descr_chain *chain = &card->tx_chain;
int status;
spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR);
while (chain->tail != chain->head) {
status = spider_net_get_descr_status(chain->tail);
switch (status) {
case SPIDER_NET_DESCR_COMPLETE:
card->netdev_stats.tx_packets++;
card->netdev_stats.tx_bytes += chain->tail->skb->len;
break;
case SPIDER_NET_DESCR_CARDOWNED:
if (!brutal)
return 1;
/* fallthrough, if we release the descriptors
* brutally (then we don't care about
* SPIDER_NET_DESCR_CARDOWNED) */
case SPIDER_NET_DESCR_RESPONSE_ERROR:
case SPIDER_NET_DESCR_PROTECTION_ERROR:
case SPIDER_NET_DESCR_FORCE_END:
if (netif_msg_tx_err(card))
pr_err("%s: forcing end of tx descriptor "
"with status x%02x\n",
card->netdev->name, status);
card->netdev_stats.tx_errors++;
break;
default:
card->netdev_stats.tx_dropped++;
return 1;
}
spider_net_release_tx_descr(card);
}
return 0;
}
@ -896,18 +763,32 @@ spider_net_prepare_tx_descr(struct spider_net_card *card,
* spider_net_kick_tx_dma writes the current tx chain head as start address
* of the tx descriptor chain and enables the transmission DMA engine
*/
static void
spider_net_kick_tx_dma(struct spider_net_card *card,
struct spider_net_descr *descr)
static inline void
spider_net_kick_tx_dma(struct spider_net_card *card)
{
/* this is the only descriptor in the output chain.
* Enable TX DMA */
struct spider_net_descr *descr;
spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
descr->bus_addr);
if (spider_net_read_reg(card, SPIDER_NET_GDTDMACCNTR) &
SPIDER_NET_TX_DMA_EN)
goto out;
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
SPIDER_NET_DMA_TX_VALUE);
descr = card->tx_chain.tail;
for (;;) {
if (spider_net_get_descr_status(descr) ==
SPIDER_NET_DESCR_CARDOWNED) {
spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
descr->bus_addr);
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
SPIDER_NET_DMA_TX_VALUE);
break;
}
if (descr == card->tx_chain.head)
break;
descr = descr->next;
}
out:
mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
}
/**
@ -915,47 +796,69 @@ spider_net_kick_tx_dma(struct spider_net_card *card,
* @skb: packet to send out
* @netdev: interface device structure
*
* returns 0 on success, <0 on failure
* returns 0 on success, !0 on failure
*/
static int
spider_net_xmit(struct sk_buff *skb, struct net_device *netdev)
{
struct spider_net_card *card = netdev_priv(netdev);
struct spider_net_descr *descr;
struct spider_net_descr_chain *chain = &card->tx_chain;
struct spider_net_descr *descr = chain->head;
unsigned long flags;
int result;
spin_lock_irqsave(&chain->lock, flags);
spider_net_release_tx_chain(card, 0);
descr = spider_net_get_next_tx_descr(card);
if (!descr)
goto error;
result = spider_net_prepare_tx_descr(card, descr, skb);
if (result)
goto error;
card->tx_chain.head = card->tx_chain.head->next;
if (spider_net_get_descr_status(descr->prev) !=
SPIDER_NET_DESCR_CARDOWNED) {
/* make sure the current descriptor is in memory. Then
* kicking it on again makes sense, if the previous is not
* card-owned anymore. Check the previous descriptor twice
* to omit an mb() in heavy traffic cases */
mb();
if (spider_net_get_descr_status(descr->prev) !=
SPIDER_NET_DESCR_CARDOWNED)
spider_net_kick_tx_dma(card, descr);
if (chain->head->next == chain->tail->prev) {
card->netdev_stats.tx_dropped++;
result = NETDEV_TX_LOCKED;
goto out;
}
mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
if (spider_net_get_descr_status(descr) != SPIDER_NET_DESCR_NOT_IN_USE) {
result = NETDEV_TX_LOCKED;
goto out;
}
return NETDEV_TX_OK;
if (spider_net_prepare_tx_descr(card, skb) != 0) {
card->netdev_stats.tx_dropped++;
result = NETDEV_TX_BUSY;
goto out;
}
error:
card->netdev_stats.tx_dropped++;
return NETDEV_TX_BUSY;
result = NETDEV_TX_OK;
spider_net_kick_tx_dma(card);
card->tx_chain.head = card->tx_chain.head->next;
out:
spin_unlock_irqrestore(&chain->lock, flags);
netif_wake_queue(netdev);
return result;
}
/**
* spider_net_cleanup_tx_ring - cleans up the TX ring
* @card: card structure
*
* spider_net_cleanup_tx_ring is called by the tx_timer (as we don't use
* interrupts to cleanup our TX ring) and returns sent packets to the stack
* by freeing them
*/
static void
spider_net_cleanup_tx_ring(struct spider_net_card *card)
{
unsigned long flags;
spin_lock_irqsave(&card->tx_chain.lock, flags);
if ((spider_net_release_tx_chain(card, 0) != 0) &&
(card->netdev->flags & IFF_UP))
spider_net_kick_tx_dma(card);
spin_unlock_irqrestore(&card->tx_chain.lock, flags);
}
/**
@ -1002,7 +905,7 @@ spider_net_pass_skb_up(struct spider_net_descr *descr,
/* unmap descriptor */
pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
PCI_DMA_BIDIRECTIONAL);
PCI_DMA_FROMDEVICE);
/* the cases we'll throw away the packet immediately */
if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
@ -1067,14 +970,11 @@ spider_net_pass_skb_up(struct spider_net_descr *descr,
static int
spider_net_decode_one_descr(struct spider_net_card *card, int napi)
{
enum spider_net_descr_status status;
struct spider_net_descr *descr;
struct spider_net_descr_chain *chain;
struct spider_net_descr_chain *chain = &card->rx_chain;
struct spider_net_descr *descr = chain->tail;
int status;
int result;
chain = &card->rx_chain;
descr = chain->tail;
status = spider_net_get_descr_status(descr);
if (status == SPIDER_NET_DESCR_CARDOWNED) {
@ -1103,7 +1003,7 @@ spider_net_decode_one_descr(struct spider_net_card *card, int napi)
card->netdev->name, status);
card->netdev_stats.rx_dropped++;
pci_unmap_single(card->pdev, descr->buf_addr,
SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL);
SPIDER_NET_MAX_FRAME, PCI_DMA_FROMDEVICE);
dev_kfree_skb_irq(descr->skb);
goto refill;
}
@ -1119,7 +1019,7 @@ spider_net_decode_one_descr(struct spider_net_card *card, int napi)
/* ok, we've got a packet in descr */
result = spider_net_pass_skb_up(descr, card, napi);
refill:
spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
descr->dmac_cmd_status = SPIDER_NET_DESCR_NOT_IN_USE;
/* change the descriptor state: */
if (!napi)
spider_net_refill_rx_chain(card);
@ -1290,21 +1190,6 @@ spider_net_set_mac(struct net_device *netdev, void *p)
return 0;
}
/**
* spider_net_enable_txdmac - enables a TX DMA controller
* @card: card structure
*
* spider_net_enable_txdmac enables the TX DMA controller by setting the
* descriptor chain tail address
*/
static void
spider_net_enable_txdmac(struct spider_net_card *card)
{
/* assume chain is aligned correctly */
spider_net_write_reg(card, SPIDER_NET_GDTDCHA,
card->tx_chain.tail->bus_addr);
}
/**
* spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
* @card: card structure
@ -1653,7 +1538,6 @@ spider_net_enable_card(struct spider_net_card *card)
{ SPIDER_NET_GMRWOLCTRL, 0 },
{ SPIDER_NET_GTESTMD, 0x10000000 },
{ SPIDER_NET_GTTQMSK, 0x00400040 },
{ SPIDER_NET_GTESTMD, 0 },
{ SPIDER_NET_GMACINTEN, 0 },
@ -1692,9 +1576,6 @@ spider_net_enable_card(struct spider_net_card *card)
spider_net_write_reg(card, SPIDER_NET_GRXDMAEN, SPIDER_NET_WOL_VALUE);
/* set chain tail adress for TX chain */
spider_net_enable_txdmac(card);
spider_net_write_reg(card, SPIDER_NET_GMACLENLMT,
SPIDER_NET_LENLMT_VALUE);
spider_net_write_reg(card, SPIDER_NET_GMACMODE,
@ -1709,6 +1590,9 @@ spider_net_enable_card(struct spider_net_card *card)
SPIDER_NET_INT1_MASK_VALUE);
spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK,
SPIDER_NET_INT2_MASK_VALUE);
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
SPIDER_NET_GDTDCEIDIS);
}
/**
@ -1728,10 +1612,12 @@ spider_net_open(struct net_device *netdev)
result = -ENOMEM;
if (spider_net_init_chain(card, &card->tx_chain,
card->descr, tx_descriptors))
card->descr,
PCI_DMA_TODEVICE, tx_descriptors))
goto alloc_tx_failed;
if (spider_net_init_chain(card, &card->rx_chain,
card->descr + tx_descriptors, rx_descriptors))
card->descr + tx_descriptors,
PCI_DMA_FROMDEVICE, rx_descriptors))
goto alloc_rx_failed;
/* allocate rx skbs */
@ -1938,7 +1824,7 @@ spider_net_workaround_rxramfull(struct spider_net_card *card)
/* empty sequencer data */
for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
sequencer++) {
spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
spider_net_write_reg(card, SPIDER_NET_GSnPRGADR +
sequencer * 8, 0x0);
for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
@ -1954,6 +1840,49 @@ spider_net_workaround_rxramfull(struct spider_net_card *card)
SPIDER_NET_CKRCTRL_STOP_VALUE);
}
/**
* spider_net_stop - called upon ifconfig down
* @netdev: interface device structure
*
* always returns 0
*/
int
spider_net_stop(struct net_device *netdev)
{
struct spider_net_card *card = netdev_priv(netdev);
tasklet_kill(&card->rxram_full_tl);
netif_poll_disable(netdev);
netif_carrier_off(netdev);
netif_stop_queue(netdev);
del_timer_sync(&card->tx_timer);
/* disable/mask all interrupts */
spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, 0);
spider_net_write_reg(card, SPIDER_NET_GHIINT1MSK, 0);
spider_net_write_reg(card, SPIDER_NET_GHIINT2MSK, 0);
/* free_irq(netdev->irq, netdev);*/
free_irq(to_pci_dev(netdev->class_dev.dev)->irq, netdev);
spider_net_write_reg(card, SPIDER_NET_GDTDMACCNTR,
SPIDER_NET_DMA_TX_FEND_VALUE);
/* turn off DMA, force end */
spider_net_disable_rxdmac(card);
/* release chains */
if (spin_trylock(&card->tx_chain.lock)) {
spider_net_release_tx_chain(card, 1);
spin_unlock(&card->tx_chain.lock);
}
spider_net_free_chain(card, &card->tx_chain);
spider_net_free_chain(card, &card->rx_chain);
return 0;
}
/**
* spider_net_tx_timeout_task - task scheduled by the watchdog timeout
* function (to be called not under interrupt status)
@ -1982,7 +1911,7 @@ spider_net_tx_timeout_task(void *data)
goto out;
spider_net_open(netdev);
spider_net_kick_tx_dma(card, card->tx_chain.head);
spider_net_kick_tx_dma(card);
netif_device_attach(netdev);
out:
@ -2065,7 +1994,6 @@ spider_net_setup_netdev(struct spider_net_card *card)
pci_set_drvdata(card->pdev, netdev);
atomic_set(&card->tx_chain_release,0);
card->rxram_full_tl.data = (unsigned long) card;
card->rxram_full_tl.func =
(void (*)(unsigned long)) spider_net_handle_rxram_full;
@ -2079,7 +2007,7 @@ spider_net_setup_netdev(struct spider_net_card *card)
spider_net_setup_netdev_ops(netdev);
netdev->features = NETIF_F_HW_CSUM;
netdev->features = NETIF_F_HW_CSUM | NETIF_F_LLTX;
/* some time: NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX |
* NETIF_F_HW_VLAN_FILTER */

71
drivers/net/spider_net.h
View File

@ -208,7 +208,10 @@ extern char spider_net_driver_name[];
#define SPIDER_NET_DMA_RX_VALUE 0x80000000
#define SPIDER_NET_DMA_RX_FEND_VALUE 0x00030003
/* to set TX_DMA_EN */
#define SPIDER_NET_DMA_TX_VALUE 0x80000000
#define SPIDER_NET_TX_DMA_EN 0x80000000
#define SPIDER_NET_GDTDCEIDIS 0x00000002
#define SPIDER_NET_DMA_TX_VALUE SPIDER_NET_TX_DMA_EN | \
SPIDER_NET_GDTDCEIDIS
#define SPIDER_NET_DMA_TX_FEND_VALUE 0x00030003
/* SPIDER_NET_UA_DESCR_VALUE is OR'ed with the unicast address */
@ -329,55 +332,23 @@ enum spider_net_int2_status {
(~SPIDER_NET_TXINT) & \
(~SPIDER_NET_RXINT) )
#define SPIDER_NET_GPREXEC 0x80000000
#define SPIDER_NET_GPRDAT_MASK 0x0000ffff
#define SPIDER_NET_GPREXEC 0x80000000
#define SPIDER_NET_GPRDAT_MASK 0x0000ffff
/* descriptor bits
*
* 1010 descriptor ready
* 0 descr in middle of chain
* 000 fixed to 0
*
* 0 no interrupt on completion
* 000 fixed to 0
* 1 no ipsec processing
* 1 last descriptor for this frame
* 00 no checksum
* 10 tcp checksum
* 11 udp checksum
*
* 00 fixed to 0
* 0 fixed to 0
* 0 no interrupt on response errors
* 0 no interrupt on invalid descr
* 0 no interrupt on dma process termination
* 0 no interrupt on descr chain end
* 0 no interrupt on descr complete
*
* 000 fixed to 0
* 0 response error interrupt status
* 0 invalid descr status
* 0 dma termination status
* 0 descr chain end status
* 0 descr complete status */
#define SPIDER_NET_DMAC_CMDSTAT_NOCS 0xa00c0000
#define SPIDER_NET_DMAC_CMDSTAT_TCPCS 0xa00e0000
#define SPIDER_NET_DMAC_CMDSTAT_UDPCS 0xa00f0000
#define SPIDER_NET_DESCR_IND_PROC_SHIFT 28
#define SPIDER_NET_DESCR_IND_PROC_MASKO 0x0fffffff
#define SPIDER_NET_DMAC_NOINTR_COMPLETE 0x00800000
#define SPIDER_NET_DMAC_NOCS 0x00040000
#define SPIDER_NET_DMAC_TCP 0x00020000
#define SPIDER_NET_DMAC_UDP 0x00030000
#define SPIDER_NET_TXDCEST 0x08000000
/* descr ready, descr is in middle of chain, get interrupt on completion */
#define SPIDER_NET_DMAC_RX_CARDOWNED 0xa0800000
enum spider_net_descr_status {
SPIDER_NET_DESCR_COMPLETE = 0x00, /* used in rx and tx */
SPIDER_NET_DESCR_RESPONSE_ERROR = 0x01, /* used in rx and tx */
SPIDER_NET_DESCR_PROTECTION_ERROR = 0x02, /* used in rx and tx */
SPIDER_NET_DESCR_FRAME_END = 0x04, /* used in rx */
SPIDER_NET_DESCR_FORCE_END = 0x05, /* used in rx and tx */
SPIDER_NET_DESCR_CARDOWNED = 0x0a, /* used in rx and tx */
SPIDER_NET_DESCR_NOT_IN_USE /* any other value */
};
#define SPIDER_NET_DESCR_IND_PROC_MASK 0xF0000000
#define SPIDER_NET_DESCR_COMPLETE 0x00000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_RESPONSE_ERROR 0x10000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_PROTECTION_ERROR 0x20000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_FRAME_END 0x40000000 /* used in rx */
#define SPIDER_NET_DESCR_FORCE_END 0x50000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_CARDOWNED 0xA0000000 /* used in rx and tx */
#define SPIDER_NET_DESCR_NOT_IN_USE 0xF0000000
struct spider_net_descr {
/* as defined by the hardware */
@ -398,7 +369,7 @@ struct spider_net_descr {
} __attribute__((aligned(32)));
struct spider_net_descr_chain {
/* we walk from tail to head */
spinlock_t lock;
struct spider_net_descr *head;
struct spider_net_descr *tail;
};
@ -453,8 +424,6 @@ struct spider_net_card {
struct spider_net_descr_chain tx_chain;
struct spider_net_descr_chain rx_chain;
atomic_t rx_chain_refill;
atomic_t tx_chain_release;
struct net_device_stats netdev_stats;

2
net/core/ethtool.c
View File

@ -437,7 +437,7 @@ static int ethtool_set_pauseparam(struct net_device *dev, void __user *useraddr)
{
struct ethtool_pauseparam pauseparam;
if (!dev->ethtool_ops->get_pauseparam)
if (!dev->ethtool_ops->set_pauseparam)
return -EOPNOTSUPP;
if (copy_from_user(&pauseparam, useraddr, sizeof(pauseparam)))