subdev/mmu/base.c

34 	struct nvkm_mmu_pt *pt;
42 nvkm_mmu_ptp_put(struct nvkm_mmu *mmu, bool force, struct nvkm_mmu_pt *pt)
44 	const int slot = pt->base >> pt->ptp->shift;
45 	struct nvkm_mmu_ptp *ptp = pt->ptp;
56 		nvkm_mmu_ptc_put(mmu, force, &ptp->pt);
61 	kfree(pt);
67 	struct nvkm_mmu_pt *pt;
71 	if (!(pt = kzalloc(sizeof(*pt), GFP_KERNEL)))
78 			kfree(pt);
82 		ptp->pt = nvkm_mmu_ptc_get(mmu, 0x1000, 0x1000, false);
83 		if (!ptp->pt) {
85 			kfree(pt);
90 		slot = nvkm_memory_size(ptp->pt->memory) >> ptp->shift;
95 	pt->ptp = ptp;
96 	pt->sub = true;
106 	pt->memory = pt->ptp->pt->memory;
107 	pt->base = slot << ptp->shift;
108 	pt->addr = pt->ptp->pt->addr + pt->base;
109 	return pt;
143 	struct nvkm_mmu_pt *pt = *ppt;
144 	if (pt) {
146 		if (pt->sub) {
148 			nvkm_mmu_ptp_put(mmu, force, pt);
155 		if (pt->ptc->refs < 8 /* Heuristic. */ && !force) {
156 			list_add_tail(&pt->head, &pt->ptc->item);
157 			pt->ptc->refs++;
159 			nvkm_memory_unref(&pt->memory);
160 			kfree(pt);
170 	struct nvkm_mmu_pt *pt;
176 		pt = nvkm_mmu_ptp_get(mmu, align, zero);
178 		return pt;
190 	pt = list_first_entry_or_null(&ptc->item, typeof(*pt), head);
191 	if (pt) {
193 			nvkm_fo64(pt->memory, 0, 0, size >> 3);
194 		list_del(&pt->head);
197 		return pt;
202 	if (!(pt = kmalloc(sizeof(*pt), GFP_KERNEL)))
204 	pt->ptc = ptc;
205 	pt->sub = false;
208 			      size, align, zero, &pt->memory);
210 		kfree(pt);
214 	pt->base = 0;
215 	pt->addr = nvkm_memory_addr(pt->memory);
216 	return pt;
224 		struct nvkm_mmu_pt *pt, *tt;
225 		list_for_each_entry_safe(pt, tt, &ptc->item, head) {
226 			nvkm_memory_unref(&pt->memory);
227 			list_del(&pt->head);
228 			kfree(pt);