1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
42 #include <powerpc/pseries/phyp-hvcall.h>
55 static int papr_supports_stuff_tce = -1;
80 		if (ofw_bus_has_prop(p, "ibm,my-dma-window"))  in phyp_iommu_set_dma_tag()
82 		if (ofw_bus_has_prop(p, "ibm,dma-window"))  in phyp_iommu_set_dma_tag()
90 	if (OF_getencprop(node, "ibm,#dma-size-cells", &dma_scells,  in phyp_iommu_set_dma_tag()
92 		OF_searchencprop(node, "#size-cells", &dma_scells,  in phyp_iommu_set_dma_tag()
94 	if (OF_getencprop(node, "ibm,#dma-address-cells", &dma_acells,  in phyp_iommu_set_dma_tag()
96 		OF_searchencprop(node, "#address-cells", &dma_acells,  in phyp_iommu_set_dma_tag()
99 	if (ofw_bus_has_prop(p, "ibm,my-dma-window"))  in phyp_iommu_set_dma_tag()
100 		OF_getencprop(node, "ibm,my-dma-window", dmawindow,  in phyp_iommu_set_dma_tag()
103 		OF_getencprop(node, "ibm,dma-window", dmawindow,  in phyp_iommu_set_dma_tag()
106 	struct dma_window *window = malloc(sizeof(struct dma_window),  in phyp_iommu_set_dma_tag()  local
108 	window->start = 0;  in phyp_iommu_set_dma_tag()
110 		window->start <<= 32;  in phyp_iommu_set_dma_tag()
111 		window->start |= dmawindow[cell];  in phyp_iommu_set_dma_tag()
113 	window->end = 0;  in phyp_iommu_set_dma_tag()
115 		window->end <<= 32;  in phyp_iommu_set_dma_tag()
116 		window->end |= dmawindow[cell];  in phyp_iommu_set_dma_tag()
118 	window->end += window->start;  in phyp_iommu_set_dma_tag()
122 	window->map = NULL;  in phyp_iommu_set_dma_tag()
124 		if (i->iobn == dmawindow[0]) {  in phyp_iommu_set_dma_tag()
125 			window->map = i;  in phyp_iommu_set_dma_tag()
130 	if (window->map == NULL) {  in phyp_iommu_set_dma_tag()
131 		window->map = malloc(sizeof(struct iommu_map), M_PHYPIOMMU,  in phyp_iommu_set_dma_tag()
133 		window->map->iobn = dmawindow[0];  in phyp_iommu_set_dma_tag()
138 		window->map->vmem = vmem_create("IOMMU mappings", PAGE_SIZE,  in phyp_iommu_set_dma_tag()
139 		    trunc_page(VMEM_ADDR_MAX) - PAGE_SIZE, PAGE_SIZE, 0,  in phyp_iommu_set_dma_tag()
141 		SLIST_INSERT_HEAD(&iommu_map_head, window->map, entries);  in phyp_iommu_set_dma_tag()
149 	if (papr_supports_stuff_tce == -1)  in phyp_iommu_set_dma_tag()
151 		    window->map->iobn, 0, 0, 0) == H_FUNCTION);  in phyp_iommu_set_dma_tag()
153 	bus_dma_tag_set_iommu(tag, bus, window);  in phyp_iommu_set_dma_tag()
163 	struct dma_window *window = cookie;  in phyp_iommu_map()  local
169 	minaddr = window->start;  in phyp_iommu_map()
170 	maxaddr = window->end;  in phyp_iommu_map()
180 		error = vmem_xalloc(window->map->vmem, allocsize,  in phyp_iommu_map()
195 			error = phyp_hcall(H_PUT_TCE, window->map->iobn,  in phyp_iommu_map()
219 	struct dma_window *window = cookie;  in phyp_iommu_unmap()  local
231 			phyp_hcall(H_STUFF_TCE, window->map->iobn, pageround, 0,  in phyp_iommu_unmap()
235 				phyp_hcall(H_PUT_TCE, window->map->iobn,  in phyp_iommu_unmap()
239 		vmem_xfree(window->map->vmem, pageround, roundedsize);  in phyp_iommu_unmap()