gpu/host1x/cdma.c

48 static void host1x_pushbuffer_destroy(struct push_buffer *pb)
50 	struct host1x_cdma *cdma = pb_to_cdma(pb);
53 	if (!pb->mapped)
57 		iommu_unmap(host1x->domain, pb->dma, pb->alloc_size);
58 		free_iova(&host1x->iova, iova_pfn(&host1x->iova, pb->dma));
61 	dma_free_wc(host1x->dev, pb->alloc_size, pb->mapped, pb->phys);
63 	pb->mapped = NULL;
64 	pb->phys = 0;
70 static int host1x_pushbuffer_init(struct push_buffer *pb)
72 	struct host1x_cdma *cdma = pb_to_cdma(pb);
78 	pb->mapped = NULL;
79 	pb->phys = 0;
80 	pb->size = HOST1X_PUSHBUFFER_SLOTS * 8;
82 	size = pb->size + 4;
85 	pb->fence = pb->size - 8;
86 	pb->pos = 0;
93 		pb->mapped = dma_alloc_wc(host1x->dev, size, &pb->phys,
95 		if (!pb->mapped)
106 		pb->dma = iova_dma_addr(&host1x->iova, alloc);
107 		err = iommu_map(host1x->domain, pb->dma, pb->phys, size,
112 		pb->mapped = dma_alloc_wc(host1x->dev, size, &pb->phys,
114 		if (!pb->mapped)
117 		pb->dma = pb->phys;
120 	pb->alloc_size = size;
122 	host1x_hw_pushbuffer_init(host1x, pb);
129 	dma_free_wc(host1x->dev, size, pb->mapped, pb->phys);
138 static void host1x_pushbuffer_push(struct push_buffer *pb, u32 op1, u32 op2)
140 	u32 *p = (u32 *)((void *)pb->mapped + pb->pos);
142 	WARN_ON(pb->pos == pb->fence);
145 	pb->pos += 8;
147 	if (pb->pos >= pb->size)
148 		pb->pos -= pb->size;
155 static void host1x_pushbuffer_pop(struct push_buffer *pb, unsigned int slots)
158 	pb->fence += slots * 8;
160 	if (pb->fence >= pb->size)
161 		pb->fence -= pb->size;
167 static u32 host1x_pushbuffer_space(struct push_buffer *pb)
169 	unsigned int fence = pb->fence;
171 	if (pb->fence < pb->pos)
172 		fence += pb->size;
174 	return (fence - pb->pos) / 8;
189 		struct push_buffer *pb = &cdma->push_buffer;
198 			space = host1x_pushbuffer_space(pb);
240 		struct push_buffer *pb = &cdma->push_buffer;
243 		space = host1x_pushbuffer_space(pb);
341 			struct push_buffer *pb = &cdma->push_buffer;
343 			host1x_pushbuffer_pop(pb, job->num_slots);
531 	struct push_buffer *pb = &cdma->push_buffer;
539 	host1x_pushbuffer_destroy(pb);
595 	struct push_buffer *pb = &cdma->push_buffer;
610 	host1x_pushbuffer_push(pb, op1, op2);
627 	struct push_buffer *pb = &cdma->push_buffer;
635 	if (pb->pos + 16 > pb->size) {
636 		extra = (pb->size - pb->pos) / 8;
641 	space = host1x_pushbuffer_space(pb);
652 		host1x_pushbuffer_push(pb, (0x5 << 28), 0xdead0000);
655 	host1x_pushbuffer_push(pb, op1, op2);
656 	host1x_pushbuffer_push(pb, op3, op4);