--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <unistd.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <xen/sys/gntalloc.h>
+#include <xen/sys/gntdev.h>
+#include <xen/xen-compat.h>
+#if __XEN_LATEST_INTERFACE_VERSION__ < 0x00040200
+#include <xs.h>
+#else
+#include <xenstore.h>
+#endif
+
+#include <rte_common.h>
+#include <rte_memory.h>
+#include <rte_eal.h>
+#include <rte_malloc.h>
+#include <rte_string_fns.h>
+#include <rte_log.h>
+#include <rte_debug.h>
+
+#include "xen_vhost.h"
+
+/* xenstore handle */
+static struct xs_handle *xs = NULL;
+
+/* gntdev file descriptor to map grant pages */
+static int d_fd = -1;
+
+/*
+ * The grant node format in xenstore for vring/mpool is like:
+ * idx#_rx_vring_gref = "gref1#, gref2#, gref3#"
+ * idx#_mempool_gref = "gref1#, gref2#, gref3#"
+ * each gref# is the grant reference for a shared page.
+ * In each shared page, we store the grant_node_item items.
+ */
+struct grant_node_item {
+ uint32_t gref;
+ uint32_t pfn;
+} __attribute__((packed));
+
+int cmdline_parse_etheraddr(void *tk, const char *srcbuf,
+ void *res, unsigned ressize);
+
+/* Map grant ref refid at addr_ori*/
+static void *
+xen_grant_mmap(void *addr_ori, int domid, int refid, uint64_t *pindex)
+{
+ struct ioctl_gntdev_map_grant_ref arg;
+ void *addr = NULL;
+ int pg_sz = getpagesize();
+
+ arg.count = 1;
+ arg.refs[0].domid = domid;
+ arg.refs[0].ref = refid;
+
+ int rv = ioctl(d_fd, IOCTL_GNTDEV_MAP_GRANT_REF, &arg);
+ if (rv) {
+ RTE_LOG(ERR, XENHOST, " %s: (%d,%d) %s (ioctl failed)\n", __func__,
+ domid, refid, strerror(errno));
+ return NULL;
+ }
+
+ if (addr_ori == NULL)
+ addr = mmap(addr_ori, pg_sz, PROT_READ|PROT_WRITE, MAP_SHARED,
+ d_fd, arg.index);
+ else
+ addr = mmap(addr_ori, pg_sz, PROT_READ|PROT_WRITE, MAP_SHARED | MAP_FIXED,
+ d_fd, arg.index);
+
+ if (addr == MAP_FAILED) {
+ RTE_LOG(ERR, XENHOST, " %s: (%d, %d) %s (map failed)\n", __func__,
+ domid, refid, strerror(errno));
+ return NULL;
+ }
+
+ if (pindex)
+ *pindex = arg.index;
+
+ return addr;
+}
+
+/* Unmap one grant ref, and munmap must be called before this */
+static int
+xen_unmap_grant_ref(uint64_t index)
+{
+ struct ioctl_gntdev_unmap_grant_ref arg;
+ int rv;
+
+ arg.count = 1;
+ arg.index = index;
+ rv = ioctl(d_fd, IOCTL_GNTDEV_UNMAP_GRANT_REF, &arg);
+ if (rv) {
+ RTE_LOG(ERR, XENHOST, " %s: index 0x%" PRIx64 "unmap failed\n", __func__, index);
+ return -1;
+ }
+ return 0;
+}
+
+/*
+ * Reserve a virtual address space.
+ * On success, returns the pointer. On failure, returns NULL.
+ */
+static void *
+get_xen_virtual(size_t size, size_t page_sz)
+{
+ void *addr;
+ uintptr_t aligned_addr;
+
+ addr = mmap(NULL, size + page_sz, PROT_READ, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+ if (addr == MAP_FAILED) {
+ RTE_LOG(ERR, XENHOST, "failed get a virtual area\n");
+ return NULL;
+ }
+
+ aligned_addr = RTE_ALIGN_CEIL((uintptr_t)addr, page_sz);
+ munmap(addr, aligned_addr - (uintptr_t)addr);
+ munmap((void *)(aligned_addr + size), page_sz + (uintptr_t)addr - aligned_addr);
+ addr = (void *)(aligned_addr);
+
+ return addr;
+}
+
+static void
+free_xen_virtual(void *addr, size_t size, size_t page_sz __rte_unused)
+{
+ if (addr)
+ munmap(addr, size);
+}
+
+/*
+ * Returns val str in xenstore.
+ * @param path
+ * Full path string for key
+ * @return
+ * Pointer to Val str, NULL on failure
+ */
+static char *
+xen_read_node(char *path, uint32_t *len)
+{
+ char *buf;
+
+ buf = xs_read(xs, XBT_NULL, path, len);
+ return buf;
+}
+
+static int
+cal_pagenum(struct xen_gnt *gnt)
+{
+ unsigned int i;
+ /*
+ * the items in the page are in the format of
+ * gref#,pfn#,...,gref#,pfn#
+ * FIXME, 0 is reserved by system, use it as terminator.
+ */
+ for (i = 0; i < (PAGE_PFNNUM) / 2; i++) {
+ if (gnt->gref_pfn[i * 2].gref <= 0)
+ break;
+ }
+
+ return i;
+}
+
+/* Frees memory allocated to a grant node */
+static void
+xen_free_gntnode(struct xen_gntnode *gntnode)
+{
+ if (gntnode == NULL)
+ return;
+ free(gntnode->gnt_info);
+ free(gntnode);
+}
+
+/*
+ * Parse a grant node.
+ * @param domid
+ * Guest domain id.
+ * @param path
+ * Full path string for a grant node, like for the following (key, val) pair
+ * idx#_mempool_gref = "gref#, gref#, gref#"
+ * path = 'local/domain/domid/control/dpdk/idx#_mempool_gref'
+ * gref# is a shared page contain packed (gref,pfn) entries
+ * @return
+ * Returns the pointer to xen_gntnode
+ */
+static struct xen_gntnode *
+parse_gntnode(int dom_id, char *path)
+{
+ char **gref_list = NULL;
+ uint32_t i, len, gref_num;
+ void *addr = NULL;
+ char *buf = NULL;
+ struct xen_gntnode *gntnode = NULL;
+ struct xen_gnt *gnt = NULL;
+ int pg_sz = getpagesize();
+ char *end;
+ uint64_t index;
+
+ if ((buf = xen_read_node(path, &len)) == NULL)
+ goto err;
+
+ gref_list = malloc(MAX_GREF_PER_NODE * sizeof(char *));
+ if (gref_list == NULL)
+ goto err;
+
+ gref_num = rte_strsplit(buf, len, gref_list, MAX_GREF_PER_NODE,
+ XEN_GREF_SPLITTOKEN);
+ if (gref_num == 0) {
+ RTE_LOG(ERR, XENHOST, " %s: invalid grant node format\n", __func__);
+ goto err;
+ }
+
+ gntnode = calloc(1, sizeof(struct xen_gntnode));
+ gnt = calloc(gref_num, sizeof(struct xen_gnt));
+ if (gnt == NULL || gntnode == NULL)
+ goto err;
+
+ for (i = 0; i < gref_num; i++) {
+ errno = 0;
+ gnt[i].gref = strtol(gref_list[i], &end, 0);
+ if (errno != 0 || end == NULL || end == gref_list[i] ||
+ (*end != '\0' && *end != XEN_GREF_SPLITTOKEN)) {
+ RTE_LOG(ERR, XENHOST, " %s: parse grant node item failed\n", __func__);
+ goto err;
+ }
+ addr = xen_grant_mmap(NULL, dom_id, gnt[i].gref, &index);
+ if (addr == NULL) {
+ RTE_LOG(ERR, XENHOST, " %s: map gref %u failed\n", __func__, gnt[i].gref);
+ goto err;
+ }
+ RTE_LOG(INFO, XENHOST, " %s: map gref %u to %p\n", __func__, gnt[i].gref, addr);
+ memcpy(gnt[i].gref_pfn, addr, pg_sz);
+ if (munmap(addr, pg_sz)) {
+ RTE_LOG(INFO, XENHOST, " %s: unmap gref %u failed\n", __func__, gnt[i].gref);
+ goto err;
+ }
+ if (xen_unmap_grant_ref(index)) {
+ RTE_LOG(INFO, XENHOST, " %s: release gref %u failed\n", __func__, gnt[i].gref);
+ goto err;
+ }
+
+ }
+
+ gntnode->gnt_num = gref_num;
+ gntnode->gnt_info = gnt;
+
+ free(buf);
+ free(gref_list);
+ return gntnode;
+
+err:
+ free(gnt);
+ free(gntnode);
+ free(gref_list);
+ free(buf);
+ return NULL;
+}
+
+/*
+ * This function maps grant node of vring or mbuf pool to a continous virtual address space,
+ * and returns mapped address, pfn array, index array
+ * @param gntnode
+ * Pointer to grant node
+ * @param domid
+ * Guest domain id
+ * @param ppfn
+ * Pointer to pfn array, caller should free this array
+ * @param pgs
+ * Pointer to number of pages
+ * @param ppindex
+ * Pointer to index array, used to release grefs when to free this node
+ * @return
+ * Pointer to mapped virtual address, NULL on failure
+ */
+static void *
+map_gntnode(struct xen_gntnode *gntnode, int domid, uint32_t **ppfn, uint32_t *pgs, uint64_t **ppindex)
+{
+ struct xen_gnt *gnt;
+ uint32_t i, j;
+ size_t total_pages = 0;
+ void *addr;
+ uint32_t *pfn;
+ uint64_t *pindex;
+ uint32_t pfn_num = 0;
+ int pg_sz;
+
+ if (gntnode == NULL)
+ return NULL;
+
+ pg_sz = getpagesize();
+ for (i = 0; i < gntnode->gnt_num; i++) {
+ gnt = gntnode->gnt_info + i;
+ total_pages += cal_pagenum(gnt);
+ }
+ if ((addr = get_xen_virtual(total_pages * pg_sz, pg_sz)) == NULL) {
+ RTE_LOG(ERR, XENHOST, " %s: failed get_xen_virtual\n", __func__);
+ return NULL;
+ }
+ pfn = calloc(total_pages, (size_t)sizeof(uint32_t));
+ pindex = calloc(total_pages, (size_t)sizeof(uint64_t));
+ if (pfn == NULL || pindex == NULL) {
+ free_xen_virtual(addr, total_pages * pg_sz, pg_sz);
+ free(pfn);
+ free(pindex);
+ return NULL;
+ }
+
+ RTE_LOG(INFO, XENHOST, " %s: total pages:%zu, map to [%p, %p]\n", __func__, total_pages, addr, RTE_PTR_ADD(addr, total_pages * pg_sz - 1));
+ for (i = 0; i < gntnode->gnt_num; i++) {
+ gnt = gntnode->gnt_info + i;
+ for (j = 0; j < (PAGE_PFNNUM) / 2; j++) {
+ if ((gnt->gref_pfn[j * 2].gref) <= 0)
+ goto _end;
+ /*alternative: batch map, or through libxc*/
+ if (xen_grant_mmap(RTE_PTR_ADD(addr, pfn_num * pg_sz),
+ domid,
+ gnt->gref_pfn[j * 2].gref,
+ &pindex[pfn_num]) == NULL) {
+ goto mmap_failed;
+ }
+ pfn[pfn_num] = gnt->gref_pfn[j * 2 + 1].pfn_num;
+ pfn_num++;
+ }
+ }
+
+mmap_failed:
+ if (pfn_num)
+ munmap(addr, pfn_num * pg_sz);
+ for (i = 0; i < pfn_num; i++) {
+ xen_unmap_grant_ref(pindex[i]);
+ }
+ free(pindex);
+ free(pfn);
+ return NULL;
+
+_end:
+ if (ppindex)
+ *ppindex = pindex;
+ else
+ free(pindex);
+ if (ppfn)
+ *ppfn = pfn;
+ else
+ free(pfn);
+ if (pgs)
+ *pgs = total_pages;
+
+ return addr;
+}
+
+static int
+parse_mpool_va(struct xen_mempool *mempool)
+{
+ char path[PATH_MAX] = {0};
+ char *buf;
+ uint32_t len;
+ char *end;
+ int ret = -1;
+
+ errno = 0;
+ snprintf(path, sizeof(path),
+ XEN_VM_ROOTNODE_FMT"/%d_"XEN_GVA_SUFFIX,
+ mempool->dom_id, mempool->pool_idx);
+
+ if((buf = xen_read_node(path, &len)) == NULL)
+ goto out;
+ mempool->gva = (void *)strtoul(buf, &end, 16);
+ if (errno != 0 || end == NULL || end == buf || *end != '\0') {
+ mempool->gva = NULL;
+ goto out;
+ }
+ ret = 0;
+out:
+ free(buf);
+ return ret;
+}
+
+/*
+ * map mbuf pool
+ */
+static int
+map_mempoolnode(struct xen_gntnode *gntnode,
+ struct xen_mempool *mempool)
+{
+ if (gntnode == NULL || mempool == NULL)
+ return -1;
+
+ mempool->hva =
+ map_gntnode(gntnode, mempool->dom_id, &mempool->mempfn_tbl, &mempool->mempfn_num, &mempool->pindex);
+
+ RTE_LOG(INFO, XENHOST, " %s: map mempool at %p\n", __func__, (void *)mempool->hva);
+ if (mempool->hva)
+ return 0;
+ else {
+ return -1;
+ }
+}
+
+void
+cleanup_mempool(struct xen_mempool *mempool)
+{
+ int pg_sz = getpagesize();
+ uint32_t i;
+
+ if (mempool->hva)
+ munmap(mempool->hva, mempool->mempfn_num * pg_sz);
+ mempool->hva = NULL;
+
+ if (mempool->pindex) {
+ RTE_LOG(INFO, XENHOST, " %s: unmap dom %02u mempool%02u %u grefs\n",
+ __func__,
+ mempool->dom_id,
+ mempool->pool_idx,
+ mempool->mempfn_num);
+ for (i = 0; i < mempool->mempfn_num; i ++) {
+ xen_unmap_grant_ref(mempool->pindex[i]);
+ }
+ }
+ mempool->pindex = NULL;
+
+ free(mempool->mempfn_tbl);
+ mempool->mempfn_tbl = NULL;
+}
+
+/*
+ * process mempool node idx#_mempool_gref, idx = 0, 1, 2...
+ * untill we encounter a node that doesn't exist.
+ */
+int
+parse_mempoolnode(struct xen_guest *guest)
+{
+ uint32_t i, len;
+ char path[PATH_MAX] = {0};
+ struct xen_gntnode *gntnode = NULL;
+ struct xen_mempool *mempool = NULL;
+ char *buf;
+
+ bzero(&guest->mempool, MAX_XENVIRT_MEMPOOL * sizeof(guest->mempool[0]));
+ guest->pool_num = 0;
+
+ while (1) {
+ /* check if null terminated */
+ snprintf(path, sizeof(path),
+ XEN_VM_ROOTNODE_FMT"/%d_"XEN_MEMPOOL_SUFFIX,
+ guest->dom_id,
+ guest->pool_num);
+
+ if ((buf = xen_read_node(path, &len)) != NULL) {
+ /* this node exists */
+ free(buf);
+ } else {
+ if (guest->pool_num == 0) {
+ RTE_LOG(ERR, PMD, "no mempool found\n");
+ return -1;
+ }
+ break;
+ }
+
+ mempool = &guest->mempool[guest->pool_num];
+ mempool->dom_id = guest->dom_id;
+ mempool->pool_idx = guest->pool_num;
+
+ RTE_LOG(INFO, XENHOST, " %s: mempool %u parse gntnode %s\n", __func__, guest->pool_num, path);
+ gntnode = parse_gntnode(guest->dom_id, path);
+ if (gntnode == NULL)
+ goto err;
+
+ if (parse_mpool_va(mempool))
+ goto err;
+
+ RTE_LOG(INFO, XENHOST, " %s: mempool %u map gntnode %s\n", __func__, guest->pool_num, path);
+ if (map_mempoolnode(gntnode, mempool))
+ goto err;
+
+ xen_free_gntnode(gntnode);
+ guest->pool_num++;
+ }
+
+ return 0;
+err:
+ if (gntnode)
+ xen_free_gntnode(gntnode);
+ for (i = 0; i < MAX_XENVIRT_MEMPOOL ; i++) {
+ cleanup_mempool(&guest->mempool[i]);
+ }
+ /* reinitialise mempool */
+ bzero(&guest->mempool, MAX_XENVIRT_MEMPOOL * sizeof(guest->mempool[0]));
+ return -1;
+}
+
+static int
+xen_map_vringflag(struct xen_vring *vring)
+{
+ char path[PATH_MAX] = {0};
+ char *buf;
+ uint32_t len,gref;
+ int pg_sz = getpagesize();
+ char *end;
+
+ snprintf(path, sizeof(path),
+ XEN_VM_ROOTNODE_FMT"/%d_"XEN_VRINGFLAG_SUFFIX,
+ vring->dom_id, vring->virtio_idx);
+
+ if((buf = xen_read_node(path, &len)) == NULL)
+ goto err;
+
+ errno = 0;
+ gref = strtol(buf, &end, 0);
+ if (errno != 0 || end == NULL || end == buf) {
+ goto err;
+ }
+ vring->flag = xen_grant_mmap(0, vring->dom_id, gref, &vring->flag_index);
+ if (vring->flag == NULL || *vring->flag == 0)
+ goto err;
+
+ free(buf);
+ return 0;
+err:
+ free(buf);
+ if (vring->flag) {
+ munmap(vring->flag, pg_sz);
+ vring->flag = NULL;
+ xen_unmap_grant_ref(vring->flag_index);
+ }
+ return -1;
+}
+
+
+static int
+xen_map_rxvringnode(struct xen_gntnode *gntnode,
+ struct xen_vring *vring)
+{
+ vring->rxvring_addr =
+ map_gntnode(gntnode, vring->dom_id, &vring->rxpfn_tbl, &vring->rxpfn_num, &vring->rx_pindex);
+ RTE_LOG(INFO, XENHOST, " %s: map rx vring at %p\n", __func__, (void *)vring->rxvring_addr);
+ if (vring->rxvring_addr)
+ return 0;
+ else
+ return -1;
+}
+
+static int
+xen_map_txvringnode(struct xen_gntnode *gntnode,
+ struct xen_vring *vring)
+{
+ vring->txvring_addr =
+ map_gntnode(gntnode, vring->dom_id, &vring->txpfn_tbl, &vring->txpfn_num, &vring->tx_pindex);
+ RTE_LOG(INFO, XENHOST, " %s: map tx vring at %p\n", __func__, (void *)vring->txvring_addr);
+ if (vring->txvring_addr)
+ return 0;
+ else
+ return -1;
+}
+
+void
+cleanup_vring(struct xen_vring *vring)
+{
+ int pg_sz = getpagesize();
+ uint32_t i;
+
+ RTE_LOG(INFO, XENHOST, " %s: cleanup dom %u vring %u\n", __func__, vring->dom_id, vring->virtio_idx);
+ if (vring->rxvring_addr) {
+ munmap(vring->rxvring_addr, vring->rxpfn_num * pg_sz);
+ RTE_LOG(INFO, XENHOST, " %s: unmap rx vring [%p, %p]\n",
+ __func__,
+ vring->rxvring_addr,
+ RTE_PTR_ADD(vring->rxvring_addr,
+ vring->rxpfn_num * pg_sz - 1));
+ }
+ vring->rxvring_addr = NULL;
+
+
+ if (vring->rx_pindex) {
+ RTE_LOG(INFO, XENHOST, " %s: unmap rx vring %u grefs\n", __func__, vring->rxpfn_num);
+ for (i = 0; i < vring->rxpfn_num; i++) {
+ xen_unmap_grant_ref(vring->rx_pindex[i]);
+ }
+ }
+ vring->rx_pindex = NULL;
+
+ free(vring->rxpfn_tbl);
+ vring->rxpfn_tbl = NULL;
+
+ if (vring->txvring_addr) {
+ munmap(vring->txvring_addr, vring->txpfn_num * pg_sz);
+ RTE_LOG(INFO, XENHOST, " %s: unmap tx vring [%p, %p]\n",
+ __func__,
+ vring->txvring_addr,
+ RTE_PTR_ADD(vring->txvring_addr,
+ vring->txpfn_num * pg_sz - 1));
+ }
+ vring->txvring_addr = NULL;
+
+ if (vring->tx_pindex) {
+ RTE_LOG(INFO, XENHOST, " %s: unmap tx vring %u grefs\n", __func__, vring->txpfn_num);
+ for (i = 0; i < vring->txpfn_num; i++) {
+ xen_unmap_grant_ref(vring->tx_pindex[i]);
+ }
+ }
+ vring->tx_pindex = NULL;
+
+ free(vring->txpfn_tbl);
+ vring->txpfn_tbl = NULL;
+
+ if (vring->flag) {
+ if (!munmap((void *)vring->flag, pg_sz))
+ RTE_LOG(INFO, XENHOST, " %s: unmap flag page at %p\n", __func__, vring->flag);
+ if (!xen_unmap_grant_ref(vring->flag_index))
+ RTE_LOG(INFO, XENHOST, " %s: release flag ref index 0x%" PRIx64 "\n", __func__, vring->flag_index);
+ }
+ vring->flag = NULL;
+ return;
+}
+
+
+
+static int
+xen_parse_etheraddr(struct xen_vring *vring)
+{
+ char path[PATH_MAX] = {0};
+ char *buf;
+ uint32_t len;
+ int ret = -1;
+
+ snprintf(path, sizeof(path),
+ XEN_VM_ROOTNODE_FMT"/%d_"XEN_ADDR_SUFFIX,
+ vring->dom_id, vring->virtio_idx);
+
+ if ((buf = xen_read_node(path, &len)) == NULL)
+ goto out;
+
+ if (cmdline_parse_etheraddr(NULL, buf, &vring->addr,
+ sizeof(vring->addr)) < 0)
+ goto out;
+ ret = 0;
+out:
+ free(buf);
+ return ret;
+}
+
+
+int
+parse_vringnode(struct xen_guest *guest, uint32_t virtio_idx)
+{
+ char path[PATH_MAX] = {0};
+ struct xen_gntnode *rx_gntnode = NULL;
+ struct xen_gntnode *tx_gntnode = NULL;
+ struct xen_vring *vring = NULL;
+
+ /*check if null terminated */
+ snprintf(path, sizeof(path),
+ XEN_VM_ROOTNODE_FMT"/%d_"XEN_RXVRING_SUFFIX,
+ guest->dom_id,
+ virtio_idx);
+
+ RTE_LOG(INFO, XENHOST, " %s: virtio %u parse rx gntnode %s\n", __func__, virtio_idx, path);
+ rx_gntnode = parse_gntnode(guest->dom_id, path);
+ if (rx_gntnode == NULL)
+ goto err;
+
+ /*check if null terminated */
+ snprintf(path, sizeof(path),
+ XEN_VM_ROOTNODE_FMT"/%d_"XEN_TXVRING_SUFFIX,
+ guest->dom_id,
+ virtio_idx);
+
+ RTE_LOG(INFO, XENHOST, " %s: virtio %u parse tx gntnode %s\n", __func__, virtio_idx, path);
+ tx_gntnode = parse_gntnode(guest->dom_id, path);
+ if (tx_gntnode == NULL)
+ goto err;
+
+ vring = &guest->vring[virtio_idx];
+ bzero(vring, sizeof(*vring));
+ vring->dom_id = guest->dom_id;
+ vring->virtio_idx = virtio_idx;
+
+ if (xen_parse_etheraddr(vring) != 0)
+ goto err;
+
+ RTE_LOG(INFO, XENHOST, " %s: virtio %u map rx gntnode %s\n", __func__, virtio_idx, path);
+ if (xen_map_rxvringnode(rx_gntnode, vring) != 0)
+ goto err;
+
+ RTE_LOG(INFO, XENHOST, " %s: virtio %u map tx gntnode %s\n", __func__, virtio_idx, path);
+ if (xen_map_txvringnode(tx_gntnode, vring) != 0)
+ goto err;
+
+ if (xen_map_vringflag(vring) != 0)
+ goto err;
+
+ guest->vring_num++;
+
+ xen_free_gntnode(rx_gntnode);
+ xen_free_gntnode(tx_gntnode);
+
+ return 0;
+
+err:
+ if (rx_gntnode)
+ xen_free_gntnode(rx_gntnode);
+ if (tx_gntnode)
+ xen_free_gntnode(tx_gntnode);
+ if (vring) {
+ cleanup_vring(vring);
+ bzero(vring, sizeof(*vring));
+ }
+ return -1;
+}
+
+/*
+ * Open xen grant dev driver
+ * @return
+ * 0 on success, -1 on failure.
+ */
+static int
+xen_grant_init(void)
+{
+ d_fd = open(XEN_GNTDEV_FNAME, O_RDWR);
+
+ return d_fd == -1? (-1): (0);
+}
+
+/*
+ * Initialise xenstore handle and open grant dev driver.
+ * @return
+ * 0 on success, -1 on failure.
+ */
+int
+xenhost_init(void)
+{
+ xs = xs_daemon_open();
+ if (xs == NULL) {
+ rte_panic("failed initialize xen daemon handler");
+ return -1;
+ }
+ if (xen_grant_init())
+ return -1;
+ return 0;
+}
Code Review / deb_dpdk.git / blobdiff