xen/blkback/blkback.c

253 	uint8_t			*kva;
257 	 * of this request's kva region.
526 	 * \brief Array of memoized bounce buffer kva offsets used
597 	 * Global pool of kva used for mapping remote domain ring
600 	vm_offset_t		  kva;
602 	/** Psuedo-physical address corresponding to kva. */
605 	/** The size of the global kva pool. */
758 	 * associated with our per-instance kva region.
879  * calculate an offset into a request's kva region.
881  * \param reqlist The request structure whose kva region will be accessed.
882  * \param pagenr  The page index used to compute the kva offset.
884  *                kva offset.
891 	return (reqlist->kva + (PAGE_SIZE * pagenr) + (sector << 9));
964 		(uintptr_t)(reqlist->kva - xbb->kva) +
1035 			free_kva = xbb->kva +
1038 			KASSERT(free_kva >= (uint8_t *)xbb->kva &&
1042 				 "kva = %#jx, ring VA = %#jx\n", free_kva,
1043 				 nr_pages * PAGE_SIZE, (uintmax_t)xbb->kva,
1075 	start_page = (intptr_t)(kva_ptr - xbb->kva) >> PAGE_SHIFT;
1132 		reqlist->kva = NULL;
1163 	if (reqlist->kva != NULL)
1164 		xbb_free_kva(xbb, reqlist->kva, reqlist->nr_segments);
1474 		memcpy((uint8_t *)reqlist->kva + kva_offset,
1530 	reqlist->kva = NULL;
1532 		reqlist->kva = xbb_get_kva(xbb, reqlist->nr_segments);
1533 		if (reqlist->kva == NULL) {
2194 			       (uint8_t *)reqlist->kva + kva_offset,
2790 	if (xbb->kva != 0) {
2792 		kmem_free(kernel_map, xbb->kva, xbb->kva_size);
2802 	xbb->kva = 0;
2911 	 * Kva for our ring is at the tail of the region of kva allocated
2914 	xbb->ring_config.va = xbb->kva
3031 	xbb->kva = kmem_alloc_nofault(kernel_map, xbb->kva_size);
3032 	if (xbb->kva == 0)
3034 	xbb->gnt_base_addr = xbb->kva;
3038 	 * into kva.  These pages will only be backed by machine
3048 		xbb->kva = 0;
3051 	xbb->kva = (vm_offset_t)rman_get_virtual(xbb->pseudo_phys_res);
3055 	DPRINTF("%s: kva: %#jx, gnt_base_addr: %#jx\n",
3056 		device_get_nameunit(xbb->dev), (uintmax_t)xbb->kva,