22 static u32 vbva_buffer_available(const struct vbva_buffer *vbva)  in vbva_buffer_available()  argument
24 	s32 diff = vbva->data_offset - vbva->free_offset;  in vbva_buffer_available()
26 	return diff > 0 ? diff : vbva->data_len + diff;  in vbva_buffer_available()
32 	struct vbva_buffer *vbva = vbva_ctx->vbva;  in vbva_buffer_place_data_at()  local
33 	u32 bytes_till_boundary = vbva->data_len - offset;  in vbva_buffer_place_data_at()
34 	u8 *dst = &vbva->data[offset];  in vbva_buffer_place_data_at()
43 		memcpy(&vbva->data[0], (u8 *)p + bytes_till_boundary, diff);  in vbva_buffer_place_data_at()
65 	struct vbva_buffer *vbva;  in vbva_write()  local
68 	vbva = vbva_ctx->vbva;  in vbva_write()
71 	if (!vbva || vbva_ctx->buffer_overflow ||  in vbva_write()
75 	available = vbva_buffer_available(vbva);  in vbva_write()
82 			available = vbva_buffer_available(vbva);  in vbva_write()
86 			if (WARN_ON(available <= vbva->partial_write_tresh)) {  in vbva_write()
90 			chunk = available - vbva->partial_write_tresh;  in vbva_write()
94 					  vbva->free_offset);  in vbva_write()
96 		vbva->free_offset = (vbva->free_offset + chunk) %  in vbva_write()
97 				    vbva->data_len;  in vbva_write()
138 		 struct vbva_buffer *vbva, s32 screen)  in vbva_enable()  argument
142 	memset(vbva, 0, sizeof(*vbva));  in vbva_enable()
143 	vbva->partial_write_tresh = 256;  in vbva_enable()
144 	vbva->data_len = vbva_ctx->buffer_length - sizeof(struct vbva_buffer);  in vbva_enable()
145 	vbva_ctx->vbva = vbva;  in vbva_enable()
159 	vbva_ctx->vbva = NULL;  in vbva_disable()
170 	if (!vbva_ctx->vbva ||  in vbva_buffer_begin_update()
171 	    !(vbva_ctx->vbva->host_flags.host_events & VBVA_F_MODE_ENABLED))  in vbva_buffer_begin_update()
176 	next = (vbva_ctx->vbva->record_free_index + 1) % VBVA_MAX_RECORDS;  in vbva_buffer_begin_update()
179 	if (next == vbva_ctx->vbva->record_first_index)  in vbva_buffer_begin_update()
183 	if (next == vbva_ctx->vbva->record_first_index)  in vbva_buffer_begin_update()
186 	record = &vbva_ctx->vbva->records[vbva_ctx->vbva->record_free_index];  in vbva_buffer_begin_update()
188 	vbva_ctx->vbva->record_free_index = next;  in vbva_buffer_begin_update()
199 	WARN_ON(!vbva_ctx->vbva || !record ||  in vbva_buffer_end_update()