sparc/mm/iommu.c

3  * iommu.c:  IOMMU specific routines for memory management.
26 #include <asm/iommu.h>
60 	struct iommu_struct *iommu;
67 	iommu = kmalloc(sizeof(struct iommu_struct), GFP_KERNEL);
68 	if (!iommu) {
69 		prom_printf("Unable to allocate iommu structure\n");
73 	iommu->regs = of_ioremap(&op->resource[0], 0, PAGE_SIZE * 3,
75 	if (!iommu->regs) {
80 	control = sbus_readl(&iommu->regs->control);
85 	sbus_writel(control, &iommu->regs->control);
87 	iommu_invalidate(iommu->regs);
88 	iommu->start = IOMMU_START;
89 	iommu->end = 0xffffffff;
98 		prom_printf("Unable to allocate iommu table [0x%lx]\n",
102 	iommu->page_table = (iopte_t *)tmp;
105 	memset(iommu->page_table, 0, IOMMU_NPTES*sizeof(iopte_t));
109 	base = __pa((unsigned long)iommu->page_table) >> 4;
110 	sbus_writel(base, &iommu->regs->base);
111 	iommu_invalidate(iommu->regs);
115 		prom_printf("Unable to allocate iommu bitmap [%d]\n",
119 	bit_map_init(&iommu->usemap, bitmap, IOMMU_NPTES);
124 		iommu->usemap.num_colors = vac_cache_size >> PAGE_SHIFT;
126 		iommu->usemap.num_colors = 1;
129 	       impl, vers, iommu->page_table,
132 	op->dev.archdata.iommu = iommu;
144 	for_each_node_by_name(dp, "iommu") {
187 	struct iommu_struct *iommu = dev->archdata.iommu;
214 	ioptex = bit_map_string_get(&iommu->usemap, npages, pfn);
216 		panic("iommu out");
217 	busa0 = iommu->start + (ioptex << PAGE_SHIFT);
218 	iopte0 = &iommu->page_table[ioptex];
224 		iommu_invalidate_page(iommu->regs, busa);
283 	struct iommu_struct *iommu = dev->archdata.iommu;
287 	unsigned int ioptex = (busa - iommu->start) >> PAGE_SHIFT;
290 	BUG_ON(busa < iommu->start);
292 		iopte_val(iommu->page_table[ioptex + i]) = 0;
293 		iommu_invalidate_page(iommu->regs, busa);
296 	bit_map_clear(&iommu->usemap, ioptex, npages);
316 	struct iommu_struct *iommu = dev->archdata.iommu;
318 	iopte_t *iopte = iommu->page_table;
340 	ioptex = bit_map_string_get(&iommu->usemap, len >> PAGE_SHIFT,
343 		panic("iommu out");
385 	iommu_invalidate(iommu->regs);
387 	*dma_handle = iommu->start + (ioptex << PAGE_SHIFT);
398 	struct iommu_struct *iommu = dev->archdata.iommu;
399 	iopte_t *iopte = iommu->page_table;
401 	int ioptex = (busa - iommu->start) >> PAGE_SHIFT;
417 	iommu_invalidate(iommu->regs);
418 	bit_map_clear(&iommu->usemap, ioptex, len >> PAGE_SHIFT);