837 static inline void reclaim_free_desc(struct q_inval *qi)  in reclaim_free_desc()  argument
839 	while (qi->desc_status[qi->free_tail] == QI_DONE ||  in reclaim_free_desc()
840 	       qi->desc_status[qi->free_tail] == QI_ABORT) {  in reclaim_free_desc()
841 		qi->desc_status[qi->free_tail] = QI_FREE;  in reclaim_free_desc()
842 		qi->free_tail = (qi->free_tail + 1) % QI_LENGTH;  in reclaim_free_desc()
843 		qi->free_cnt++;  in reclaim_free_desc()
851 	struct q_inval *qi = iommu->qi;  in qi_check_fault()  local
854 	if (qi->desc_status[wait_index] == QI_ABORT)  in qi_check_fault()
869 				(unsigned long long)qi->desc[index].low,  in qi_check_fault()
870 				(unsigned long long)qi->desc[index].high);  in qi_check_fault()
871 			memcpy(&qi->desc[index], &qi->desc[wait_index],  in qi_check_fault()
873 			__iommu_flush_cache(iommu, &qi->desc[index],  in qi_check_fault()
894 			if (qi->desc_status[head] == QI_IN_USE)  in qi_check_fault()
895 				qi->desc_status[head] = QI_ABORT;  in qi_check_fault()
899 		if (qi->desc_status[wait_index] == QI_ABORT)  in qi_check_fault()
916 	struct q_inval *qi = iommu->qi;  in qi_submit_sync()  local
921 	if (!qi)  in qi_submit_sync()
924 	hw = qi->desc;  in qi_submit_sync()
929 	spin_lock_irqsave(&qi->q_lock, flags);  in qi_submit_sync()
930 	while (qi->free_cnt < 3) {  in qi_submit_sync()
931 		spin_unlock_irqrestore(&qi->q_lock, flags);  in qi_submit_sync()
933 		spin_lock_irqsave(&qi->q_lock, flags);  in qi_submit_sync()
936 	index = qi->free_head;  in qi_submit_sync()
939 	qi->desc_status[index] = qi->desc_status[wait_index] = QI_IN_USE;  in qi_submit_sync()
945 	wait_desc.high = virt_to_phys(&qi->desc_status[wait_index]);  in qi_submit_sync()
952 	qi->free_head = (qi->free_head + 2) % QI_LENGTH;  in qi_submit_sync()
953 	qi->free_cnt -= 2;  in qi_submit_sync()
959 	writel(qi->free_head << DMAR_IQ_SHIFT, iommu->reg + DMAR_IQT_REG);  in qi_submit_sync()
961 	while (qi->desc_status[wait_index] != QI_DONE) {  in qi_submit_sync()
973 		spin_unlock(&qi->q_lock);  in qi_submit_sync()
975 		spin_lock(&qi->q_lock);  in qi_submit_sync()
978 	qi->desc_status[index] = QI_DONE;  in qi_submit_sync()
980 	reclaim_free_desc(qi);  in qi_submit_sync()
981 	spin_unlock_irqrestore(&qi->q_lock, flags);  in qi_submit_sync()
1100 	struct q_inval *qi = iommu->qi;  in __dmar_enable_qi()  local
1102 	qi->free_head = qi->free_tail = 0;  in __dmar_enable_qi()
1103 	qi->free_cnt = QI_LENGTH;  in __dmar_enable_qi()
1110 	dmar_writeq(iommu->reg + DMAR_IQA_REG, virt_to_phys(qi->desc));  in __dmar_enable_qi()
1128 	struct q_inval *qi;  in dmar_enable_qi()  local
1137 	if (iommu->qi)  in dmar_enable_qi()
1140 	iommu->qi = kmalloc(sizeof(*qi), GFP_ATOMIC);  in dmar_enable_qi()
1141 	if (!iommu->qi)  in dmar_enable_qi()
1144 	qi = iommu->qi;  in dmar_enable_qi()
1149 		kfree(qi);  in dmar_enable_qi()
1150 		iommu->qi = 0;  in dmar_enable_qi()
1154 	qi->desc = page_address(desc_page);  in dmar_enable_qi()
1156 	qi->desc_status = kmalloc(QI_LENGTH * sizeof(int), GFP_ATOMIC);  in dmar_enable_qi()
1157 	if (!qi->desc_status) {  in dmar_enable_qi()
1158 		free_page((unsigned long) qi->desc);  in dmar_enable_qi()
1159 		kfree(qi);  in dmar_enable_qi()
1160 		iommu->qi = 0;  in dmar_enable_qi()
1164 	qi->free_head = qi->free_tail = 0;  in dmar_enable_qi()
1165 	qi->free_cnt = QI_LENGTH;  in dmar_enable_qi()
1167 	spin_lock_init(&qi->q_lock);  in dmar_enable_qi()
1438 	if (!iommu->qi)  in dmar_reenable_qi()