Lines Matching +full:num +full:- +full:irqs
1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2006-2008, Michael Ellerman, IBM Corporation.
15 int msi_bitmap_alloc_hwirqs(struct msi_bitmap *bmp, int num)
18 int offset, order = get_count_order(num);
20 spin_lock_irqsave(&bmp->lock, flags);
22 offset = bitmap_find_next_zero_area(bmp->bitmap, bmp->irq_count, 0,
23 num, (1 << order) - 1);
24 if (offset > bmp->irq_count)
27 bitmap_set(bmp->bitmap, offset, num);
28 spin_unlock_irqrestore(&bmp->lock, flags);
30 pr_debug("msi_bitmap: allocated 0x%x at offset 0x%x\n", num, offset);
34 spin_unlock_irqrestore(&bmp->lock, flags);
35 return -ENOMEM;
40 unsigned int num)
45 num, offset);
47 spin_lock_irqsave(&bmp->lock, flags);
48 bitmap_clear(bmp->bitmap, offset, num);
49 spin_unlock_irqrestore(&bmp->lock, flags);
59 spin_lock_irqsave(&bmp->lock, flags);
60 bitmap_allocate_region(bmp->bitmap, hwirq, 0);
61 spin_unlock_irqrestore(&bmp->lock, flags);
65 * msi_bitmap_reserve_dt_hwirqs - Reserve irqs specified in the device tree.
69 * irqs can be used for MSI. If found those irqs reserved in the device tree
80 if (!bmp->of_node)
83 p = of_get_property(bmp->of_node, "msi-available-ranges", &len);
85 pr_debug("msi_bitmap: no msi-available-ranges property " \
86 "found on %pOF\n", bmp->of_node);
91 printk(KERN_WARNING "msi_bitmap: Malformed msi-available-ranges"
92 " property on %pOF\n", bmp->of_node);
93 return -EINVAL;
96 bitmap_allocate_region(bmp->bitmap, 0, get_count_order(bmp->irq_count));
98 spin_lock(&bmp->lock);
104 bitmap_release_region(bmp->bitmap, *p + j, 0);
107 spin_unlock(&bmp->lock);
118 return -EINVAL;
123 bmp->bitmap_from_slab = slab_is_available();
124 if (bmp->bitmap_from_slab)
125 bmp->bitmap = kzalloc(size, GFP_KERNEL);
127 bmp->bitmap = memblock_alloc_or_panic(size, SMP_CACHE_BYTES);
129 kmemleak_not_leak(bmp->bitmap);
132 if (!bmp->bitmap) {
134 return -ENOMEM;
137 /* We zalloc'ed the bitmap, so all irqs are free by default */
138 spin_lock_init(&bmp->lock);
139 bmp->of_node = of_node_get(of_node);
140 bmp->irq_count = irq_count;
147 if (bmp->bitmap_from_slab)
148 kfree(bmp->bitmap);
149 of_node_put(bmp->of_node);
150 bmp->bitmap = NULL;
160 /* Can't allocate a bitmap of 0 irqs */
170 /* With no node, there's no msi-available-ranges, so expect > 0 */
191 msi_bitmap_free_hwirqs(&bmp, 3, size - 3);
211 /* Clients may WARN_ON bitmap == NULL for "not-allocated" */
218 const char *expected_str = "0-9,20-24,28-39,41-99,220-255";
219 char *prop_name = "msi-available-ranges";
234 /* No msi-available-ranges, so expect > 0 */
242 /* Now create a fake msi-available-ranges property */
252 /* msi-available-ranges, so expect == 0 */
265 printk(KERN_DEBUG "Running MSI bitmap self-tests ...\n");