*/
#include <linux/config.h>
-
#include <linux/compiler.h>
#include <linux/crc32.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/tcp.h>
#include <linux/types.h>
+#include <linux/vmalloc.h>
#include <linux/wait.h>
#include <linux/workqueue.h>
#include <asm/bitops.h>
writel(value, card->regs + reg);
}
-/**
- * spider_net_write_reg_sync - writes to an SMMIO register of a card
- * @card: device structure
- * @reg: register to write to
- * @value: value to write into the specified SMMIO register
- *
- * Unlike spider_net_write_reg, this will also make sure the
- * data arrives on the card by reading the reg again.
- */
-static void
-spider_net_write_reg_sync(struct spider_net_card *card, u32 reg, u32 value)
-{
- value = cpu_to_le32(value);
- writel(value, card->regs + reg);
- (void)readl(card->regs + reg);
-}
-
-/**
- * spider_net_rx_irq_off - switch off rx irq on this spider card
- * @card: device structure
- *
- * switches off rx irq by masking them out in the GHIINTnMSK register
- */
-static void
-spider_net_rx_irq_off(struct spider_net_card *card)
-{
- u32 regvalue;
- unsigned long flags;
-
- spin_lock_irqsave(&card->intmask_lock, flags);
- regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
- regvalue &= ~SPIDER_NET_RXINT;
- spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue);
- spin_unlock_irqrestore(&card->intmask_lock, flags);
-}
-
/** spider_net_write_phy - write to phy register
* @netdev: adapter to be written to
* @mii_id: id of MII
}
/**
- * spider_net_rx_irq_on - switch on rx irq on this spider card
- * @card: device structure
- *
- * switches on rx irq by enabling them in the GHIINTnMSK register
- */
-static void
-spider_net_rx_irq_on(struct spider_net_card *card)
-{
- u32 regvalue;
- unsigned long flags;
-
- spin_lock_irqsave(&card->intmask_lock, flags);
- regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
- regvalue |= SPIDER_NET_RXINT;
- spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue);
- spin_unlock_irqrestore(&card->intmask_lock, flags);
-}
-
-/**
- * spider_net_tx_irq_off - switch off tx irq on this spider card
+ * spider_net_rx_irq_off - switch off rx irq on this spider card
* @card: device structure
*
- * switches off tx irq by masking them out in the GHIINTnMSK register
+ * switches off rx irq by masking them out in the GHIINTnMSK register
*/
static void
-spider_net_tx_irq_off(struct spider_net_card *card)
+spider_net_rx_irq_off(struct spider_net_card *card)
{
u32 regvalue;
- unsigned long flags;
- spin_lock_irqsave(&card->intmask_lock, flags);
- regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
- regvalue &= ~SPIDER_NET_TXINT;
- spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue);
- spin_unlock_irqrestore(&card->intmask_lock, flags);
+ regvalue = SPIDER_NET_INT0_MASK_VALUE & (~SPIDER_NET_RXINT);
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
}
/**
- * spider_net_tx_irq_on - switch on tx irq on this spider card
+ * spider_net_rx_irq_on - switch on rx irq on this spider card
* @card: device structure
*
- * switches on tx irq by enabling them in the GHIINTnMSK register
+ * switches on rx irq by enabling them in the GHIINTnMSK register
*/
static void
-spider_net_tx_irq_on(struct spider_net_card *card)
+spider_net_rx_irq_on(struct spider_net_card *card)
{
u32 regvalue;
- unsigned long flags;
- spin_lock_irqsave(&card->intmask_lock, flags);
- regvalue = spider_net_read_reg(card, SPIDER_NET_GHIINT0MSK);
- regvalue |= SPIDER_NET_TXINT;
- spider_net_write_reg_sync(card, SPIDER_NET_GHIINT0MSK, regvalue);
- spin_unlock_irqrestore(&card->intmask_lock, flags);
+ regvalue = SPIDER_NET_INT0_MASK_VALUE | SPIDER_NET_RXINT;
+ spider_net_write_reg(card, SPIDER_NET_GHIINT0MSK, regvalue);
}
/**
spider_net_get_descr_status(struct spider_net_descr *descr)
{
u32 cmd_status;
- rmb();
+
cmd_status = descr->dmac_cmd_status;
- rmb();
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) */
{
u32 cmd_status;
/* read the status */
- mb();
cmd_status = descr->dmac_cmd_status;
/* clean the upper 4 bits */
cmd_status &= SPIDER_NET_DESCR_IND_PROC_MASKO;
cmd_status |= ((u32)status)<<SPIDER_NET_DESCR_IND_PROC_SHIFT;
/* and write it back */
descr->dmac_cmd_status = cmd_status;
- wmb();
}
/**
{
int i;
struct spider_net_descr *descr;
+ dma_addr_t buf;
- spin_lock_init(&card->chain_lock);
+ atomic_set(&card->rx_chain_refill,0);
descr = start_descr;
memset(descr, 0, sizeof(*descr) * no);
for (i=0; i<no; i++, descr++) {
spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
- descr->bus_addr =
- pci_map_single(card->pdev, descr,
- SPIDER_NET_DESCR_SIZE,
- PCI_DMA_BIDIRECTIONAL);
+ buf = pci_map_single(card->pdev, descr,
+ SPIDER_NET_DESCR_SIZE,
+ PCI_DMA_BIDIRECTIONAL);
- if (descr->bus_addr == DMA_ERROR_CODE)
+ if (buf == DMA_ERROR_CODE)
goto iommu_error;
+ descr->bus_addr = buf;
descr->next = descr + 1;
descr->prev = descr - 1;
for (i=0; i < no; i++, descr++)
if (descr->bus_addr)
pci_unmap_single(card->pdev, descr->bus_addr,
- SPIDER_NET_DESCR_SIZE, PCI_DMA_BIDIRECTIONAL);
+ SPIDER_NET_DESCR_SIZE,
+ PCI_DMA_BIDIRECTIONAL);
return -ENOMEM;
}
if (descr->skb) {
dev_kfree_skb(descr->skb);
pci_unmap_single(card->pdev, descr->buf_addr,
- SPIDER_NET_MAX_MTU,
+ SPIDER_NET_MAX_FRAME,
PCI_DMA_BIDIRECTIONAL);
}
descr = descr->next;
int bufsize;
/* we need to round up the buffer size to a multiple of 128 */
- bufsize = (SPIDER_NET_MAX_MTU + SPIDER_NET_RXBUF_ALIGN - 1) &
+ bufsize = (SPIDER_NET_MAX_FRAME + SPIDER_NET_RXBUF_ALIGN - 1) &
(~(SPIDER_NET_RXBUF_ALIGN - 1));
/* and we need to have it 128 byte aligned, therefore we allocate a
/* allocate an skb */
descr->skb = dev_alloc_skb(bufsize + SPIDER_NET_RXBUF_ALIGN - 1);
if (!descr->skb) {
- if (net_ratelimit())
- if (netif_msg_rx_err(card))
- pr_err("Not enough memory to allocate "
- "rx buffer\n");
+ if (netif_msg_rx_err(card) && net_ratelimit())
+ pr_err("Not enough memory to allocate rx buffer\n");
return -ENOMEM;
}
descr->buf_size = bufsize;
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_MTU,
- PCI_DMA_BIDIRECTIONAL);
+ SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL);
descr->buf_addr = buf;
if (buf == DMA_ERROR_CODE) {
dev_kfree_skb_any(descr->skb);
- if (netif_msg_rx_err(card))
+ 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);
} else {
}
/**
- * spider_net_enable_rxctails - sets RX dmac chain tail addresses
+ * spider_net_enable_rxchtails - sets RX dmac chain tail addresses
* @card: card structure
*
- * spider_net_enable_rxctails sets the RX DMAC chain tail adresses in the
+ * spider_net_enable_rxchtails sets the RX DMAC chain tail adresses in the
* chip by writing to the appropriate register. DMA is enabled in
* spider_net_enable_rxdmac.
*/
static void
spider_net_enable_rxdmac(struct spider_net_card *card)
{
+ wmb();
spider_net_write_reg(card, SPIDER_NET_GDADMACCNTR,
SPIDER_NET_DMA_RX_VALUE);
}
* spider_net_refill_rx_chain - refills descriptors/skbs in the rx chains
* @card: card structure
*
- * refills descriptors in all chains (last used chain first): allocates skbs
- * and iommu-maps them.
+ * refills descriptors in the rx chain: allocates skbs and iommu-maps them.
*/
static void
spider_net_refill_rx_chain(struct spider_net_card *card)
{
struct spider_net_descr_chain *chain;
- int count = 0;
- unsigned long flags;
chain = &card->rx_chain;
- spin_lock_irqsave(&card->chain_lock, flags);
- while (spider_net_get_descr_status(chain->head) ==
- SPIDER_NET_DESCR_NOT_IN_USE) {
- if (spider_net_prepare_rx_descr(card, chain->head))
- break;
- count++;
- chain->head = chain->head->next;
- }
- spin_unlock_irqrestore(&card->chain_lock, 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;
+ }
- /* could be optimized, only do that, if we know the DMA processing
- * has terminated */
- if (count)
- spider_net_enable_rxdmac(card);
+ atomic_dec(&card->rx_chain_refill);
}
/**
/* this will allocate the rest of the rx buffers; if not, it's
* business as usual later on */
spider_net_refill_rx_chain(card);
+ spider_net_enable_rxdmac(card);
return 0;
error:
* @card: adapter structure
* @brutal: if set, don't care about whether descriptor seems to be in use
*
- * releases the tx descriptors that spider has finished with (if non-brutal)
- * or simply release tx descriptors (if brutal)
+ * 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 void
+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;
- spider_net_tx_irq_off(card);
+ if (atomic_inc_return(&card->tx_chain_release) != 1) {
+ atomic_dec(&card->tx_chain_release);
+ return 1;
+ }
- /* no lock for chain needed, if this is only executed once at a time */
-again:
for (;;) {
status = spider_net_get_descr_status(tx_chain->tail);
switch (status) {
case SPIDER_NET_DESCR_CARDOWNED:
- if (!brutal) goto out;
+ if (!brutal)
+ goto out;
/* fallthrough, if we release the descriptors
* brutally (then we don't care about
* SPIDER_NET_DESCR_CARDOWNED) */
tx_chain->tail = tx_chain->tail->next;
}
out:
+ atomic_dec(&card->tx_chain_release);
+
netif_wake_queue(card->netdev);
- if (!brutal) {
- /* switch on tx irqs (while we are still in the interrupt
- * handler, so we don't get an interrupt), check again
- * for done descriptors. This results in fewer interrupts */
- spider_net_tx_irq_on(card);
- status = spider_net_get_descr_status(tx_chain->tail);
- switch (status) {
- case SPIDER_NET_DESCR_RESPONSE_ERROR:
- case SPIDER_NET_DESCR_PROTECTION_ERROR:
- case SPIDER_NET_DESCR_FORCE_END:
- case SPIDER_NET_DESCR_COMPLETE:
- goto again;
- default:
- break;
- }
- }
+ 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);
+ }
}
/**
static u8
spider_net_get_multicast_hash(struct net_device *netdev, __u8 *addr)
{
- /* FIXME: an addr of 01:00:5e:00:00:01 must result in 0xa9,
- * ff:ff:ff:ff:ff:ff must result in 0xfd */
u32 crc;
u8 hash;
+ char addr_for_crc[ETH_ALEN] = { 0, };
+ int i, bit;
+
+ for (i = 0; i < ETH_ALEN * 8; i++) {
+ bit = (addr[i / 8] >> (i % 8)) & 1;
+ addr_for_crc[ETH_ALEN - 1 - i / 8] += bit << (7 - (i % 8));
+ }
- crc = crc32_be(~0, addr, netdev->addr_len);
+ crc = crc32_be(~0, addr_for_crc, netdev->addr_len);
hash = (crc >> 27);
hash <<= 3;
hash |= crc & 7;
+ hash &= 0xff;
return hash;
}
{
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);
* @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.
+ * 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) {
+ if (skb->nh.iph->protocol == IPPROTO_TCP)
descr->dmac_cmd_status = SPIDER_NET_DMAC_CMDSTAT_TCPCS;
- } else if (skb->nh.iph->protocol == IPPROTO_UDP) {
+ 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 */
+ 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;
- }
}
}
struct spider_net_descr *descr,
struct sk_buff *skb)
{
- dma_addr_t buf = pci_map_single(card->pdev, skb->data,
- skb->len, PCI_DMA_BIDIRECTIONAL);
+ dma_addr_t buf;
+
+ buf = pci_map_single(card->pdev, skb->data,
+ skb->len, PCI_DMA_BIDIRECTIONAL);
if (buf == DMA_ERROR_CODE) {
- if (netif_msg_tx_err(card))
+ if (netif_msg_tx_err(card) && net_ratelimit())
pr_err("could not iommu-map packet (%p, %i). "
"Dropping packet\n", skb->data, skb->len);
return -ENOMEM;
descr->skb = skb;
descr->data_status = 0;
- /* make sure the above values are in memory before we change the
- * status */
- wmb();
-
spider_net_set_txdescr_cmdstat(descr,skb);
return 0;
struct spider_net_descr *descr;
int result;
- descr = spider_net_get_next_tx_descr(card);
+ spider_net_release_tx_chain(card, 0);
- if (!descr) {
- netif_stop_queue(netdev);
+ descr = spider_net_get_next_tx_descr(card);
- descr = spider_net_get_next_tx_descr(card);
- if (!descr)
- goto error;
- else
- netif_start_queue(netdev);
- }
+ if (!descr)
+ goto error;
result = spider_net_prepare_tx_descr(card, descr, skb);
if (result)
card->tx_chain.head = card->tx_chain.head->next;
- /* make sure the status from spider_net_prepare_tx_descr is in
- * memory before we check out the previous descriptor */
- wmb();
-
if (spider_net_get_descr_status(descr->prev) !=
- SPIDER_NET_DESCR_CARDOWNED)
- spider_net_kick_tx_dma(card, descr);
+ 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);
+ }
+
+ mod_timer(&card->tx_timer, jiffies + SPIDER_NET_TX_TIMER);
return NETDEV_TX_OK;
error:
card->netdev_stats.tx_dropped++;
- return NETDEV_TX_LOCKED;
+ return NETDEV_TX_BUSY;
}
/**
* spider_net_pass_skb_up - takes an skb from a descriptor and passes it on
* @descr: descriptor to process
* @card: card structure
+ * @napi: whether caller is in NAPI context
*
* returns 1 on success, 0 if no packet was passed to the stack
*
*/
static int
spider_net_pass_skb_up(struct spider_net_descr *descr,
- struct spider_net_card *card)
+ struct spider_net_card *card, int napi)
{
struct sk_buff *skb;
struct net_device *netdev;
netdev = card->netdev;
- /* check for errors in the data_error flag */
- if ((data_error & SPIDER_NET_DATA_ERROR_MASK) &&
- netif_msg_rx_err(card))
- pr_err("error in received descriptor found, "
- "data_status=x%08x, data_error=x%08x\n",
- data_status, data_error);
-
- /* prepare skb, unmap descriptor */
- skb = descr->skb;
- pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_MTU,
+ /* unmap descriptor */
+ pci_unmap_single(card->pdev, descr->buf_addr, SPIDER_NET_MAX_FRAME,
PCI_DMA_BIDIRECTIONAL);
/* the cases we'll throw away the packet immediately */
- if (data_error & SPIDER_NET_DESTROY_RX_FLAGS)
+ if (data_error & SPIDER_NET_DESTROY_RX_FLAGS) {
+ if (netif_msg_rx_err(card))
+ pr_err("error in received descriptor found, "
+ "data_status=x%08x, data_error=x%08x\n",
+ data_status, data_error);
return 0;
+ }
+ skb = descr->skb;
skb->dev = netdev;
skb_put(skb, descr->valid_size);
/* checksum offload */
if (card->options.rx_csum) {
- if ( (data_status & SPIDER_NET_DATA_STATUS_CHK_MASK) &&
- (!(data_error & SPIDER_NET_DATA_ERROR_CHK_MASK)) )
+ if ( ( (data_status & SPIDER_NET_DATA_STATUS_CKSUM_MASK) ==
+ SPIDER_NET_DATA_STATUS_CKSUM_MASK) &&
+ !(data_error & SPIDER_NET_DATA_ERR_CKSUM_MASK))
skb->ip_summed = CHECKSUM_UNNECESSARY;
else
skb->ip_summed = CHECKSUM_NONE;
- } else {
+ } else
skb->ip_summed = CHECKSUM_NONE;
- }
if (data_status & SPIDER_NET_VLAN_PACKET) {
/* further enhancements: HW-accel VLAN
}
/* pass skb up to stack */
- netif_receive_skb(skb);
+ if (napi)
+ netif_receive_skb(skb);
+ else
+ netif_rx_ni(skb);
/* update netdevice statistics */
card->netdev_stats.rx_packets++;
}
/**
- * spider_net_decode_descr - processes an rx descriptor
+ * spider_net_decode_one_descr - processes an rx descriptor
* @card: card structure
+ * @napi: whether caller is in NAPI context
*
* 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
+ * the packet up to the stack. This function is called in softirq
+ * context, e.g. either bottom half from interrupt or NAPI polling context
*/
static int
-spider_net_decode_one_descr(struct spider_net_card *card)
+spider_net_decode_one_descr(struct spider_net_card *card, int napi)
{
enum spider_net_descr_status status;
struct spider_net_descr *descr;
if (status == SPIDER_NET_DESCR_CARDOWNED) {
/* nothing in the descriptor yet */
- return 0;
+ result=0;
+ goto out;
}
if (status == SPIDER_NET_DESCR_NOT_IN_USE) {
- /* not initialized yet, I bet chain->tail == chain->head
- * and the ring is empty */
+ /* not initialized yet, the ring must be empty */
spider_net_refill_rx_chain(card);
- return 0;
+ spider_net_enable_rxdmac(card);
+ result=0;
+ goto out;
}
- /* descriptor definitively used -- move on head */
+ /* descriptor definitively used -- move on tail */
chain->tail = descr->next;
result = 0;
pr_err("%s: dropping RX descriptor with state %d\n",
card->netdev->name, status);
card->netdev_stats.rx_dropped++;
+ pci_unmap_single(card->pdev, descr->buf_addr,
+ SPIDER_NET_MAX_FRAME, PCI_DMA_BIDIRECTIONAL);
+ dev_kfree_skb_irq(descr->skb);
goto refill;
}
}
/* ok, we've got a packet in descr */
- result = spider_net_pass_skb_up(descr, card);
+ result = spider_net_pass_skb_up(descr, card, napi);
refill:
spider_net_set_descr_status(descr, SPIDER_NET_DESCR_NOT_IN_USE);
/* change the descriptor state: */
- spider_net_refill_rx_chain(card);
-
+ if (!napi)
+ spider_net_refill_rx_chain(card);
+out:
return result;
}
packets_to_do = min(*budget, netdev->quota);
while (packets_to_do) {
- if (spider_net_decode_one_descr(card)) {
+ if (spider_net_decode_one_descr(card, 1)) {
packets_done++;
packets_to_do--;
} else {
netdev->quota -= packets_done;
*budget -= packets_done;
+ spider_net_refill_rx_chain(card);
/* if all packets are in the stack, enable interrupts and return 0 */
/* if not, return 1 */
card->tx_chain.tail->bus_addr);
}
+/**
+ * spider_net_handle_rxram_full - cleans up RX ring upon RX RAM full interrupt
+ * @card: card structure
+ *
+ * spider_net_handle_rxram_full empties the RX ring so that spider can put
+ * more packets in it and empty its RX RAM. This is called in bottom half
+ * context
+ */
+static void
+spider_net_handle_rxram_full(struct spider_net_card *card)
+{
+ while (spider_net_decode_one_descr(card, 0))
+ ;
+ spider_net_enable_rxchtails(card);
+ spider_net_enable_rxdmac(card);
+ netif_rx_schedule(card->netdev);
+}
+
/**
* spider_net_handle_error_irq - handles errors raised by an interrupt
* @card: card structure
switch (i)
{
case SPIDER_NET_GTMFLLINT:
- if (netif_msg_intr(card))
+ if (netif_msg_intr(card) && net_ratelimit())
pr_err("Spider TX RAM full\n");
show_error = 0;
break;
+ case SPIDER_NET_GRFDFLLINT: /* fallthrough */
+ case SPIDER_NET_GRFCFLLINT: /* fallthrough */
+ case SPIDER_NET_GRFBFLLINT: /* fallthrough */
+ case SPIDER_NET_GRFAFLLINT: /* fallthrough */
case SPIDER_NET_GRMFLLINT:
- if (netif_msg_intr(card))
+ if (netif_msg_intr(card) && net_ratelimit())
pr_err("Spider RX RAM full, incoming packets "
- "might be discarded !\n");
- netif_rx_schedule(card->netdev);
- spider_net_enable_rxchtails(card);
- spider_net_enable_rxdmac(card);
+ "might be discarded!\n");
+ spider_net_rx_irq_off(card);
+ tasklet_schedule(&card->rxram_full_tl);
+ show_error = 0;
break;
/* case SPIDER_NET_GTMSHTINT: problem, print a message */
/* allrighty. tx from previous descr ok */
show_error = 0;
break;
- /* case SPIDER_NET_GRFDFLLINT: print a message down there */
- /* case SPIDER_NET_GRFCFLLINT: print a message down there */
- /* case SPIDER_NET_GRFBFLLINT: print a message down there */
- /* case SPIDER_NET_GRFAFLLINT: print a message down there */
/* chain end */
case SPIDER_NET_GDDDCEINT: /* fallthrough */
"restarting DMAC %c.\n",
'D'+i-SPIDER_NET_GDDDCEINT);
spider_net_refill_rx_chain(card);
+ spider_net_enable_rxdmac(card);
show_error = 0;
break;
case SPIDER_NET_GDAINVDINT:
/* could happen when rx chain is full */
spider_net_refill_rx_chain(card);
+ spider_net_enable_rxdmac(card);
show_error = 0;
break;
if (!status_reg)
return IRQ_NONE;
- if (status_reg & SPIDER_NET_TXINT)
- spider_net_release_tx_chain(card, 0);
-
if (status_reg & SPIDER_NET_RXINT ) {
spider_net_rx_irq_off(card);
netif_rx_schedule(netdev);
}
- /* we do this after rx and tx processing, as we want the tx chain
- * processed to see, whether we should restart tx dma processing */
- spider_net_handle_error_irq(card, status_reg);
+ if (status_reg & SPIDER_NET_ERRINT )
+ spider_net_handle_error_irq(card, status_reg);
/* clear interrupt sources */
spider_net_write_reg(card, SPIDER_NET_GHIINT0STS, status_reg);
/**
* spider_net_download_firmware - loads firmware into the adapter
* @card: card structure
- * @firmware: firmware pointer
+ * @firmware_ptr: pointer to firmware data
*
- * spider_net_download_firmware loads the firmware opened by
- * spider_net_init_firmware into the adapter.
+ * spider_net_download_firmware loads the firmware data into the
+ * adapter. It assumes the length etc. to be allright.
*/
static int
spider_net_download_firmware(struct spider_net_card *card,
- const struct firmware *firmware)
+ u8 *firmware_ptr)
{
int sequencer, i;
- u32 *fw_ptr = (u32 *)firmware->data;
+ u32 *fw_ptr = (u32 *)firmware_ptr;
/* stop sequencers */
spider_net_write_reg(card, SPIDER_NET_GSINIT,
SPIDER_NET_STOP_SEQ_VALUE);
- for (sequencer = 0; sequencer < 6; sequencer++) {
+ for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
+ sequencer++) {
spider_net_write_reg(card,
SPIDER_NET_GSnPRGADR + sequencer * 8, 0);
- for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
+ for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
sequencer * 8, *fw_ptr);
fw_ptr++;
static int
spider_net_init_firmware(struct spider_net_card *card)
{
- struct firmware *firmware;
+ struct firmware *firmware = NULL;
struct device_node *dn;
- u8 *fw_prop;
- int err = -EIO;
+ u8 *fw_prop = NULL;
+ int err = -ENOENT;
+ int fw_size;
if (request_firmware((const struct firmware **)&firmware,
- SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) < 0) {
- if (netif_msg_probe(card))
- pr_err("Couldn't read in sequencer data file %s.\n",
- SPIDER_NET_FIRMWARE_NAME);
-
- dn = pci_device_to_OF_node(card->pdev);
- if (!dn)
- goto out;
+ SPIDER_NET_FIRMWARE_NAME, &card->pdev->dev) == 0) {
+ if ( (firmware->size != SPIDER_NET_FIRMWARE_LEN) &&
+ netif_msg_probe(card) ) {
+ pr_err("Incorrect size of spidernet firmware in " \
+ "filesystem. Looking in host firmware...\n");
+ goto try_host_fw;
+ }
+ err = spider_net_download_firmware(card, firmware->data);
- fw_prop = (u8 *)get_property(dn, "firmware", NULL);
- if (!fw_prop)
- goto out;
+ release_firmware(firmware);
+ if (err)
+ goto try_host_fw;
- memcpy(firmware->data, fw_prop, 6 * SPIDER_NET_FIRMWARE_LEN * sizeof(u32));
- firmware->size = 6 * SPIDER_NET_FIRMWARE_LEN * sizeof(u32);
+ goto done;
}
- if (firmware->size != 6 * SPIDER_NET_FIRMWARE_LEN * sizeof(u32)) {
- if (netif_msg_probe(card))
- pr_err("Invalid size of sequencer data file %s.\n",
- SPIDER_NET_FIRMWARE_NAME);
- goto out;
+try_host_fw:
+ dn = pci_device_to_OF_node(card->pdev);
+ if (!dn)
+ goto out_err;
+
+ fw_prop = (u8 *)get_property(dn, "firmware", &fw_size);
+ if (!fw_prop)
+ goto out_err;
+
+ if ( (fw_size != SPIDER_NET_FIRMWARE_LEN) &&
+ netif_msg_probe(card) ) {
+ pr_err("Incorrect size of spidernet firmware in " \
+ "host firmware\n");
+ goto done;
}
- if (!spider_net_download_firmware(card, firmware))
- err = 0;
-out:
- release_firmware(firmware);
+ err = spider_net_download_firmware(card, fw_prop);
+done:
+ return err;
+out_err:
+ if (netif_msg_probe(card))
+ pr_err("Couldn't find spidernet firmware in filesystem " \
+ "or host firmware\n");
return err;
}
SPIDER_NET_CKRCTRL_RUN_VALUE);
/* empty sequencer data */
- for (sequencer = 0; sequencer < 6; sequencer++) {
+ for (sequencer = 0; sequencer < SPIDER_NET_FIRMWARE_SEQS;
+ sequencer++) {
spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
sequencer * 8, 0x0);
- for (i = 0; i < SPIDER_NET_FIRMWARE_LEN; i++) {
+ for (i = 0; i < SPIDER_NET_FIRMWARE_SEQWORDS; i++) {
spider_net_write_reg(card, SPIDER_NET_GSnPRGDAT +
sequencer * 8, 0x0);
}
SET_NETDEV_DEV(netdev, &card->pdev->dev);
pci_set_drvdata(card->pdev, netdev);
- spin_lock_init(&card->intmask_lock);
+
+ 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;
+ init_timer(&card->tx_timer);
+ card->tx_timer.function =
+ (void (*)(unsigned long)) spider_net_cleanup_tx_ring;
+ card->tx_timer.data = (unsigned long) card;
netdev->irq = card->pdev->irq;
card->options.rx_csum = SPIDER_NET_RX_CSUM_DEFAULT;
projects / GitHub / LineageOS / android_kernel_samsung_universal7580.git / commitdiff