ethernet/toshiba/spider_net.c

279 	struct spider_net_descr *descr;
281 	descr = chain->ring;
283 		descr->bus_addr = 0;
284 		descr->hwdescr->next_descr_addr = 0;
285 		descr = descr->next;
286 	} while (descr != chain->ring);
307 	struct spider_net_descr *descr;
320 	descr = chain->ring;
323 	for (i=0; i < chain->num_desc; i++, descr++, hwdescr++) {
327 		descr->hwdescr = hwdescr;
328 		descr->bus_addr = buf;
329 		descr->next = descr + 1;
330 		descr->prev = descr - 1;
335 	(descr-1)->next = chain->ring;
336 	chain->ring->prev = descr-1;
345  * spider_net_free_rx_chain_contents - frees descr contents in rx chain
353 	struct spider_net_descr *descr;
355 	descr = card->rx_chain.head;
357 		if (descr->skb) {
359 					 descr->hwdescr->buf_addr,
362 			dev_kfree_skb(descr->skb);
363 			descr->skb = NULL;
365 		descr = descr->next;
366 	} while (descr != card->rx_chain.head);
372  * @descr: descriptor to re-init
381 			    struct spider_net_descr *descr)
383 	struct spider_net_hw_descr *hwdescr = descr->hwdescr;
396 	descr->skb = netdev_alloc_skb(card->netdev,
398 	if (!descr->skb) {
411 	offset = ((unsigned long)descr->skb->data) &
414 		skb_reserve(descr->skb, SPIDER_NET_RXBUF_ALIGN - offset);
416 	buf = dma_map_single(&card->pdev->dev, descr->skb->data,
419 		dev_kfree_skb_any(descr->skb);
420 		descr->skb = NULL;
521 	struct spider_net_descr *descr = start;
525 		descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
526 		descr = descr->next;
527 	} while (descr != start);
653 	struct spider_net_descr *descr;
669 	descr = card->tx_chain.head;
670 	if (descr->next == chain->tail->prev) {
676 	hwdescr = descr->hwdescr;
677 	chain->head = descr->next;
679 	descr->skb = skb;
699 	/* Chain the bus address, so that the DMA engine finds this descr. */
701 	descr->prev->hwdescr->next_descr_addr = descr->bus_addr;
710 	struct spider_net_descr *descr = card->tx_chain.tail;
720 	while (descr != card->tx_chain.head) {
721 		status = descr->hwdescr->dmac_cmd_status & SPIDER_NET_DESCR_NOT_IN_USE;
724 		descr = descr->next;
733 	descr = card->tx_chain.tail;
736 		descr = descr->next;
740 	descr->hwdescr->dmac_cmd_status |= SPIDER_NET_DESCR_TXDESFLG;
741 	if (card->low_watermark && card->low_watermark != descr) {
746 	card->low_watermark = descr;
768 	struct spider_net_descr *descr;
781 		descr = chain->tail;
782 		hwdescr = descr->hwdescr;
788 			dev->stats.tx_bytes += descr->skb->len;
820 		chain->tail = descr->next;
822 		skb = descr->skb;
823 		descr->skb = NULL;
851 	struct spider_net_descr *descr;
857 	descr = card->tx_chain.tail;
859 		if (spider_net_get_descr_status(descr->hwdescr) ==
862 					descr->bus_addr);
867 		if (descr == card->tx_chain.head)
869 		descr = descr->next;
943  * @descr: descriptor to process
950 spider_net_pass_skb_up(struct spider_net_descr *descr,
953 	struct spider_net_hw_descr *hwdescr = descr->hwdescr;
954 	struct sk_buff *skb = descr->skb;
993 	struct spider_net_descr *descr= start;
1006 	dev_info(dev, "Chain tail located at descr=%d, status=0x%x\n",
1015 		hwd = descr->hwdescr;
1016 		off = descr - chain->ring;
1019 		if (descr == chain->head)
1023 		if (curr_desc == descr->bus_addr)
1027 		if (next_desc == descr->bus_addr)
1045 		descr = descr->next;
1046 	} while (descr != start);
1053 	descr = start;
1056 		struct spider_net_hw_descr *hwd = descr->hwdescr;
1058 		cnt = descr - chain->ring;
1060 		         cnt, status, descr->skb);
1062 		         descr->bus_addr, hwd->buf_addr, hwd->buf_size);
1071 		descr = descr->next;
1072 	} while (descr != start);
1091 	struct spider_net_descr *descr;
1095 	descr = chain->head;
1096 	status = spider_net_get_descr_status(descr->hwdescr);
1103 	descr = chain->head;
1104 	status = spider_net_get_descr_status(descr->hwdescr);
1107 		descr = descr->next;
1108 		status = spider_net_get_descr_status(descr->hwdescr);
1110 	chain->head = descr;
1118 	struct spider_net_descr *descr;
1122 	descr = chain->tail;
1123 	status = spider_net_get_descr_status(descr->hwdescr);
1128 		descr = descr->next;
1129 		status = spider_net_get_descr_status(descr->hwdescr);
1131 	chain->tail = descr;
1154 	struct spider_net_descr *descr = chain->tail;
1155 	struct spider_net_hw_descr *hwdescr = descr->hwdescr;
1167 	chain->tail = descr->next;
1214 		pr_err("which=%ld\n", descr - card->rx_chain.ring);
1220 	/* Ok, we've got a packet in descr */
1221 	spider_net_pass_skb_up(descr, card);
1222 	descr->skb = NULL;
1229 	dev_kfree_skb_irq(descr->skb);
1230 	descr->skb = NULL;
1489 		/* allrighty. tx from previous descr ok */