kni: support userspace VA

[dpdk.git] / kernel / linux / kni / kni_dev.h

diff --git a/kernel/linux/kni/kni_dev.h b/kernel/linux/kni/kni_dev.h
index c1ca678..fb641b6 100644 (file)
--- a/kernel/linux/kni/kni_dev.h
+++ b/kernel/linux/kni/kni_dev.h
@@ -41,6 +41,8 @@ struct kni_dev {
        /* kni list */
        struct list_head list;
 
+       uint8_t iova_mode;
+
        uint32_t core_id;            /* Core ID to bind */
        char name[RTE_KNI_NAMESIZE]; /* Network device name */
        struct task_struct *pthread;
@@ -84,8 +86,48 @@ struct kni_dev {
        void *va[MBUF_BURST_SZ];
        void *alloc_pa[MBUF_BURST_SZ];
        void *alloc_va[MBUF_BURST_SZ];
+
+       struct task_struct *usr_tsk;
 };
 
+#ifdef HAVE_IOVA_TO_KVA_MAPPING_SUPPORT
+static inline phys_addr_t iova_to_phys(struct task_struct *tsk,
+                                      unsigned long iova)
+{
+       phys_addr_t offset, phys_addr;
+       struct page *page = NULL;
+       long ret;
+
+       offset = iova & (PAGE_SIZE - 1);
+
+       /* Read one page struct info */
+#ifdef GET_USER_PAGES_REMOTE_API_V3
+       ret = get_user_pages_remote(tsk, tsk->mm, iova, 1,
+                                   FOLL_TOUCH, &page, NULL, NULL);
+#endif
+#ifdef GET_USER_PAGES_REMOTE_API_V2
+       ret = get_user_pages_remote(tsk, tsk->mm, iova, 1,
+                                   FOLL_TOUCH, &page, NULL);
+#endif
+#ifdef GET_USER_PAGES_REMOTE_API_V1
+       ret = get_user_pages_remote(tsk, tsk->mm, iova, 1
+                                   0, 0, &page, NULL);
+#endif
+       if (ret < 0)
+               return 0;
+
+       phys_addr = page_to_phys(page) | offset;
+       put_page(page);
+
+       return phys_addr;
+}
+
+static inline void *iova_to_kva(struct task_struct *tsk, unsigned long iova)
+{
+       return phys_to_virt(iova_to_phys(tsk, iova));
+}
+#endif
+
 void kni_net_release_fifo_phy(struct kni_dev *kni);
 void kni_net_rx(struct kni_dev *kni);
 void kni_net_init(struct net_device *dev);