void msi_bitmap_reserve_hwirq(struct msi_bitmap *bmp, unsigned int hwirq)
{
unsigned long flags;
pr_debug("msi_bitmap: reserving hwirq 0x%x\n", hwirq);
spin_lock_irqsave(&bmp->lock, flags);
bitmap_allocate_region(bmp->bitmap, hwirq, 0);
spin_unlock_irqrestore(&bmp->lock, flags);
}
static int cxgb4_set_ftid(struct tid_info *t, int fidx, int family,
unsigned int chip_ver)
{
spin_lock_bh(&t->ftid_lock);
if (test_bit(fidx, t->ftid_bmap)) {
spin_unlock_bh(&t->ftid_lock);
return -EBUSY;
}
if (family == PF_INET) {
__set_bit(fidx, t->ftid_bmap);
} else {
if (chip_ver < CHELSIO_T6)
bitmap_allocate_region(t->ftid_bmap, fidx, 2);
else
bitmap_allocate_region(t->ftid_bmap, fidx, 1);
}
spin_unlock_bh(&t->ftid_lock);
return 0;
}
void *dma_mark_declared_memory_occupied(struct device *dev,
dma_addr_t device_addr, size_t size)
{
struct dma_coherent_mem *mem = dev->dma_mem;
int pos, err;
int pages = (size + (device_addr & ~PAGE_MASK) + PAGE_SIZE - 1);
pages >>= PAGE_SHIFT;
if (!mem)
return ERR_PTR(-EINVAL);
pos = (device_addr - mem->device_base) >> PAGE_SHIFT;
err = bitmap_allocate_region(mem->bitmap, pos, get_order(pages));
if (err != 0)
return ERR_PTR(err);
return mem->virt_base + (pos << PAGE_SHIFT);
}
/**
* msi_bitmap_reserve_dt_hwirqs - Reserve irqs specified in the device tree.
* @bmp: pointer to the MSI bitmap.
*
* Looks in the device tree to see if there is a property specifying which
* irqs can be used for MSI. If found those irqs reserved in the device tree
* are reserved in the bitmap.
*
* Returns 0 for success, < 0 if there was an error, and > 0 if no property
* was found in the device tree.
**/
int msi_bitmap_reserve_dt_hwirqs(struct msi_bitmap *bmp)
{
int i, j, len;
const u32 *p;
if (!bmp->of_node)
return 1;
p = of_get_property(bmp->of_node, "msi-available-ranges", &len);
if (!p) {
pr_debug("msi_bitmap: no msi-available-ranges property " \
"found on %s\n", bmp->of_node->full_name);
return 1;
}
if (len % (2 * sizeof(u32)) != 0) {
printk(KERN_WARNING "msi_bitmap: Malformed msi-available-ranges"
" property on %s\n", bmp->of_node->full_name);
return -EINVAL;
}
bitmap_allocate_region(bmp->bitmap, 0, get_count_order(bmp->irq_count));
spin_lock(&bmp->lock);
/* Format is: (<u32 start> <u32 count>)+ */
len /= 2 * sizeof(u32);
for (i = 0; i < len; i++, p += 2) {
for (j = 0; j < *(p + 1); j++)
bitmap_release_region(bmp->bitmap, *p + j, 0);
}
spin_unlock(&bmp->lock);
return 0;
}