drivers/atm/idt77252.c

639 	struct scq_info *scq;
641 	scq = kzalloc(sizeof(struct scq_info), GFP_KERNEL);
642 	if (!scq)
644 	scq->base = dma_alloc_coherent(&card->pcidev->dev, SCQ_SIZE,
645 				       &scq->paddr, GFP_KERNEL);
646 	if (scq->base == NULL) {
647 		kfree(scq);
651 	scq->next = scq->base;
652 	scq->last = scq->base + (SCQ_ENTRIES - 1);
653 	atomic_set(&scq->used, 0);
655 	spin_lock_init(&scq->lock);
656 	spin_lock_init(&scq->skblock);
658 	skb_queue_head_init(&scq->transmit);
659 	skb_queue_head_init(&scq->pending);
662 		 scq->base, scq->next, scq->last, (unsigned long long)scq->paddr);
664 	return scq;
668 free_scq(struct idt77252_dev *card, struct scq_info *scq)
674 			  scq->base, scq->paddr);
676 	while ((skb = skb_dequeue(&scq->transmit))) {
687 	while ((skb = skb_dequeue(&scq->pending))) {
698 	kfree(scq);
705 	struct scq_info *scq = vc->scq;
710 	TXPRINTK("%s: SCQ: next 0x%p\n", card->name, scq->next);
712 	atomic_inc(&scq->used);
713 	entries = atomic_read(&scq->used);
715 		atomic_dec(&scq->used);
719 	skb_queue_tail(&scq->transmit, skb);
744 	spin_lock_irqsave(&scq->lock, flags);
745 	scq->next->word_1 = cpu_to_le32(tbd->word_1 |
747 	scq->next->word_2 = cpu_to_le32(tbd->word_2);
748 	scq->next->word_3 = cpu_to_le32(tbd->word_3);
749 	scq->next->word_4 = cpu_to_le32(tbd->word_4);
751 	if (scq->next == scq->last)
752 		scq->next = scq->base;
754 		scq->next++;
756 	write_sram(card, scq->scd,
757 		   scq->paddr +
758 		   (u32)((unsigned long)scq->next - (unsigned long)scq->base));
759 	spin_unlock_irqrestore(&scq->lock, flags);
761 	scq->trans_start = jiffies;
768 	TXPRINTK("%d entries in SCQ used (push).\n", atomic_read(&scq->used));
771 		card->name, atomic_read(&scq->used),
772 		read_sram(card, scq->scd + 1), scq->next);
777 	if (time_after(jiffies, scq->trans_start + HZ)) {
783 		scq->trans_start = jiffies;
793 	struct scq_info *scq = vc->scq;
798 		 card->name, atomic_read(&scq->used), scq->next);
800 	skb = skb_dequeue(&scq->transmit);
817 	atomic_dec(&scq->used);
819 	spin_lock(&scq->skblock);
820 	while ((skb = skb_dequeue(&scq->pending))) {
822 			skb_queue_head(&vc->scq->pending, skb);
826 	spin_unlock(&scq->skblock);
915 	spin_lock_irqsave(&vc->scq->skblock, flags);
916 	skb_queue_tail(&vc->scq->pending, skb);
918 	while ((skb = skb_dequeue(&vc->scq->pending))) {
920 			skb_queue_head(&vc->scq->pending, skb);
924 	spin_unlock_irqrestore(&vc->scq->skblock, flags);
950 fill_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
952 	write_sram(card, scq->scd, scq->paddr);
953 	write_sram(card, scq->scd + 1, 0x00000000);
954 	write_sram(card, scq->scd + 2, 0xffffffff);
955 	write_sram(card, scq->scd + 3, 0x00000000);
959 clear_scd(struct idt77252_dev *card, struct scq_info *scq, int class)
1745 		        card->name, tct, vc->scq->scd);
1747 		write_sram(card, tct + 0, TCT_CBR | vc->scq->scd);
1759 		        card->name, tct, vc->scq->scd);
1761 		write_sram(card, tct + 0, TCT_UBR | vc->scq->scd);
2261 	vc->scq = alloc_scq(card, vc->class);
2262 	if (!vc->scq) {
2267 	vc->scq->scd = get_free_scd(card, vc);
2268 	if (vc->scq->scd == 0) {
2270 		free_scq(card, vc->scq);
2274 	fill_scd(card, vc->scq, vc->class);
2281 		free_scq(card, vc->scq);
2290 				free_scq(card, vc->scq);
2302 				free_scq(card, vc->scq);
2540 		while (atomic_read(&vc->scq->used) > 0) {
2544 					card->name, atomic_read(&vc->scq->used));
2550 		clear_scd(card, vc->scq, vc->class);
2559 		free_scq(card, vc->scq);
2930 	vc->scq = alloc_scq(card, vc->class);
2931 	if (!vc->scq) {
2940 	vc->scq->scd = card->scd_base;
2942 	fill_scd(card, vc->scq, vc->class);
2963 	free_scq(card, vc->scq);