mirror of https://github.com/F-Stack/f-stack.git
133 lines
2.7 KiB
C
133 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright(c) 2010-2014 Intel Corporation.
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*/
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#ifndef _KNI_DEV_H_
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#define _KNI_DEV_H_
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#ifdef pr_fmt
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#undef pr_fmt
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#endif
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#define KNI_VERSION "1.0"
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#include "compat.h"
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#include <linux/if.h>
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#include <linux/wait.h>
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#ifdef HAVE_SIGNAL_FUNCTIONS_OWN_HEADER
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#include <linux/sched/signal.h>
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#else
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#include <linux/sched.h>
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#endif
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#include <linux/netdevice.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <rte_kni_common.h>
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#define KNI_KTHREAD_RESCHEDULE_INTERVAL 5 /* us */
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#define MBUF_BURST_SZ 32
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/* Default carrier state for created KNI network interfaces */
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extern uint32_t kni_dflt_carrier;
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/**
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* A structure describing the private information for a kni device.
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*/
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struct kni_dev {
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/* kni list */
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struct list_head list;
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uint8_t iova_mode;
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uint32_t core_id; /* Core ID to bind */
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char name[RTE_KNI_NAMESIZE]; /* Network device name */
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struct task_struct *pthread;
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/* wait queue for req/resp */
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wait_queue_head_t wq;
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struct mutex sync_lock;
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/* kni device */
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struct net_device *net_dev;
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/* queue for packets to be sent out */
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struct rte_kni_fifo *tx_q;
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/* queue for the packets received */
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struct rte_kni_fifo *rx_q;
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/* queue for the allocated mbufs those can be used to save sk buffs */
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struct rte_kni_fifo *alloc_q;
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/* free queue for the mbufs to be freed */
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struct rte_kni_fifo *free_q;
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/* request queue */
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struct rte_kni_fifo *req_q;
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/* response queue */
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struct rte_kni_fifo *resp_q;
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void *sync_kva;
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void *sync_va;
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void *mbuf_kva;
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void *mbuf_va;
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/* mbuf size */
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uint32_t mbuf_size;
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/* buffers */
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void *pa[MBUF_BURST_SZ];
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void *va[MBUF_BURST_SZ];
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void *alloc_pa[MBUF_BURST_SZ];
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void *alloc_va[MBUF_BURST_SZ];
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struct task_struct *usr_tsk;
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};
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#ifdef HAVE_IOVA_TO_KVA_MAPPING_SUPPORT
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static inline phys_addr_t iova_to_phys(struct task_struct *tsk,
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unsigned long iova)
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{
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phys_addr_t offset, phys_addr;
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struct page *page = NULL;
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long ret;
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offset = iova & (PAGE_SIZE - 1);
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/* Read one page struct info */
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#ifdef HAVE_TSK_IN_GUP
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ret = get_user_pages_remote(tsk, tsk->mm, iova, 1,
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FOLL_TOUCH, &page, NULL, NULL);
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#else
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ret = get_user_pages_remote(tsk->mm, iova, 1,
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FOLL_TOUCH, &page, NULL, NULL);
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#endif
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if (ret < 0)
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return 0;
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phys_addr = page_to_phys(page) | offset;
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put_page(page);
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return phys_addr;
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}
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static inline void *iova_to_kva(struct task_struct *tsk, unsigned long iova)
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{
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return phys_to_virt(iova_to_phys(tsk, iova));
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}
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#endif
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void kni_net_release_fifo_phy(struct kni_dev *kni);
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void kni_net_rx(struct kni_dev *kni);
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void kni_net_init(struct net_device *dev);
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void kni_net_config_lo_mode(char *lo_str);
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void kni_net_poll_resp(struct kni_dev *kni);
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#endif
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