1 // SPDX-License-Identifier: GPL-2.0-only
3  * Copyright 2006-2008, Michael Ellerman, IBM Corporation.
20 	spin_lock_irqsave(&bmp->lock, flags);  in msi_bitmap_alloc_hwirqs()
22 	offset = bitmap_find_next_zero_area(bmp->bitmap, bmp->irq_count, 0,  in msi_bitmap_alloc_hwirqs()
23 					    num, (1 << order) - 1);  in msi_bitmap_alloc_hwirqs()
24 	if (offset > bmp->irq_count)  in msi_bitmap_alloc_hwirqs()
27 	bitmap_set(bmp->bitmap, offset, num);  in msi_bitmap_alloc_hwirqs()
28 	spin_unlock_irqrestore(&bmp->lock, flags);  in msi_bitmap_alloc_hwirqs()
30 	pr_debug("msi_bitmap: allocated 0x%x at offset 0x%x\n", num, offset);  in msi_bitmap_alloc_hwirqs()
34 	spin_unlock_irqrestore(&bmp->lock, flags);  in msi_bitmap_alloc_hwirqs()
35 	return -ENOMEM;  in msi_bitmap_alloc_hwirqs()
44 	pr_debug("msi_bitmap: freeing 0x%x at offset 0x%x\n",  in msi_bitmap_free_hwirqs()
47 	spin_lock_irqsave(&bmp->lock, flags);  in msi_bitmap_free_hwirqs()
48 	bitmap_clear(bmp->bitmap, offset, num);  in msi_bitmap_free_hwirqs()
49 	spin_unlock_irqrestore(&bmp->lock, flags);  in msi_bitmap_free_hwirqs()
57 	pr_debug("msi_bitmap: reserving hwirq 0x%x\n", hwirq);  in msi_bitmap_reserve_hwirq()
59 	spin_lock_irqsave(&bmp->lock, flags);  in msi_bitmap_reserve_hwirq()
60 	bitmap_allocate_region(bmp->bitmap, hwirq, 0);  in msi_bitmap_reserve_hwirq()
61 	spin_unlock_irqrestore(&bmp->lock, flags);  in msi_bitmap_reserve_hwirq()
65  * msi_bitmap_reserve_dt_hwirqs - Reserve irqs specified in the device tree.
66  * @bmp: pointer to the MSI bitmap.
69  * irqs can be used for MSI. If found those irqs reserved in the device tree
80 	if (!bmp->of_node)  in msi_bitmap_reserve_dt_hwirqs()
83 	p = of_get_property(bmp->of_node, "msi-available-ranges", &len);  in msi_bitmap_reserve_dt_hwirqs()
85 		pr_debug("msi_bitmap: no msi-available-ranges property " \  in msi_bitmap_reserve_dt_hwirqs()
86 			 "found on %pOF\n", bmp->of_node);  in msi_bitmap_reserve_dt_hwirqs()
91 		printk(KERN_WARNING "msi_bitmap: Malformed msi-available-ranges"  in msi_bitmap_reserve_dt_hwirqs()
92 		       " property on %pOF\n", bmp->of_node);  in msi_bitmap_reserve_dt_hwirqs()
93 		return -EINVAL;  in msi_bitmap_reserve_dt_hwirqs()
96 	bitmap_allocate_region(bmp->bitmap, 0, get_count_order(bmp->irq_count));  in msi_bitmap_reserve_dt_hwirqs()
98 	spin_lock(&bmp->lock);  in msi_bitmap_reserve_dt_hwirqs()
104 			bitmap_release_region(bmp->bitmap, *p + j, 0);  in msi_bitmap_reserve_dt_hwirqs()
107 	spin_unlock(&bmp->lock);  in msi_bitmap_reserve_dt_hwirqs()
118 		return -EINVAL;  in msi_bitmap_alloc()
121 	pr_debug("msi_bitmap: allocator bitmap size is 0x%x bytes\n", size);  in msi_bitmap_alloc()
123 	bmp->bitmap_from_slab = slab_is_available();  in msi_bitmap_alloc()
124 	if (bmp->bitmap_from_slab)  in msi_bitmap_alloc()
125 		bmp->bitmap = kzalloc(size, GFP_KERNEL);  in msi_bitmap_alloc()
127 		bmp->bitmap = memblock_alloc(size, SMP_CACHE_BYTES);  in msi_bitmap_alloc()
128 		if (!bmp->bitmap)  in msi_bitmap_alloc()
132 		kmemleak_not_leak(bmp->bitmap);  in msi_bitmap_alloc()
135 	if (!bmp->bitmap) {  in msi_bitmap_alloc()
137 		return -ENOMEM;  in msi_bitmap_alloc()
141 	spin_lock_init(&bmp->lock);  in msi_bitmap_alloc()
142 	bmp->of_node = of_node_get(of_node);  in msi_bitmap_alloc()
143 	bmp->irq_count = irq_count;  in msi_bitmap_alloc()
150 	if (bmp->bitmap_from_slab)  in msi_bitmap_free()
151 		kfree(bmp->bitmap);  in msi_bitmap_free()
152 	of_node_put(bmp->of_node);  in msi_bitmap_free()
153 	bmp->bitmap = NULL;  in msi_bitmap_free()
173 	/* With no node, there's no msi-available-ranges, so expect > 0 */  in test_basics()
194 	msi_bitmap_free_hwirqs(&bmp, 3, size - 3);  in test_basics()
214 	/* Clients may WARN_ON bitmap == NULL for "not-allocated" */  in test_basics()
221 	const char *expected_str = "0-9,20-24,28-39,41-99,220-255";  in test_of_node()
222 	char *prop_name = "msi-available-ranges";  in test_of_node()
237 	/* No msi-available-ranges, so expect > 0 */  in test_of_node()
245 	/* Now create a fake msi-available-ranges property */  in test_of_node()
255 	/* msi-available-ranges, so expect == 0 */  in test_of_node()
268 	printk(KERN_DEBUG "Running MSI bitmap self-tests ...\n");  in msi_bitmap_selftest()