ethernet/intel/e100.c

416 struct rx {
417 	struct rx *next, *prev;
544 	struct rx *rxs				____cacheline_aligned;
545 	struct rx *rx_to_use;
546 	struct rx *rx_to_clean;
1901 static inline void e100_start_receiver(struct nic *nic, struct rx *rx)
1907 	if (!rx) rx = nic->rxs;
1910 	if (rx->skb) {
1911 		e100_exec_cmd(nic, ruc_start, rx->dma_addr);
1917 static int e100_rx_alloc_skb(struct nic *nic, struct rx *rx)
1919 	if (!(rx->skb = netdev_alloc_skb_ip_align(nic->netdev, RFD_BUF_LEN)))
1923 	skb_copy_to_linear_data(rx->skb, &nic->blank_rfd, sizeof(struct rfd));
1924 	rx->dma_addr = dma_map_single(&nic->pdev->dev, rx->skb->data,
1927 	if (dma_mapping_error(&nic->pdev->dev, rx->dma_addr)) {
1928 		dev_kfree_skb_any(rx->skb);
1929 		rx->skb = NULL;
1930 		rx->dma_addr = 0;
1937 	if (rx->prev->skb) {
1938 		struct rfd *prev_rfd = (struct rfd *)rx->prev->skb->data;
1939 		put_unaligned_le32(rx->dma_addr, &prev_rfd->link);
1941 					   rx->prev->dma_addr,
1949 static int e100_rx_indicate(struct nic *nic, struct rx *rx,
1953 	struct sk_buff *skb = rx->skb;
1962 	dma_sync_single_for_cpu(&nic->pdev->dev, rx->dma_addr,
1982 		dma_sync_single_for_device(&nic->pdev->dev, rx->dma_addr,
1996 	dma_unmap_single(&nic->pdev->dev, rx->dma_addr, RFD_BUF_LEN,
2043 	rx->skb = NULL;
2051 	struct rx *rx;
2053 	struct rx *old_before_last_rx, *new_before_last_rx;
2057 	for (rx = nic->rx_to_clean; rx->skb; rx = nic->rx_to_clean = rx->next) {
2058 		err = e100_rx_indicate(nic, rx, work_done, work_to_do);
2078 	for (rx = nic->rx_to_use; !rx->skb; rx = nic->rx_to_use = rx->next) {
2079 		if (unlikely(e100_rx_alloc_skb(nic, rx)))
2130 	struct rx *rx;
2136 		for (rx = nic->rxs, i = 0; i < count; rx++, i++) {
2137 			if (rx->skb) {
2139 						 rx->dma_addr, RFD_BUF_LEN,
2141 				dev_kfree_skb(rx->skb);
2153 	struct rx *rx;
2160 	if (!(nic->rxs = kcalloc(count, sizeof(struct rx), GFP_KERNEL)))
2163 	for (rx = nic->rxs, i = 0; i < count; rx++, i++) {
2164 		rx->next = (i + 1 < count) ? rx + 1 : nic->rxs;
2165 		rx->prev = (i == 0) ? nic->rxs + count - 1 : rx - 1;
2166 		if (e100_rx_alloc_skb(nic, rx)) {
2178 	rx = nic->rxs->prev->prev;
2179 	before_last = (struct rfd *)rx->skb->data;
2182 	dma_sync_single_for_device(&nic->pdev->dev, rx->dma_addr,
2588 	netif_info(nic, drv, nic->netdev, "Ring Param settings: rx: %d, tx %d\n",
2894 	/* D100 MAC doesn't allow rx of vlan packets with normal MTU */