src/vnet/devices/virtio/virtio.h - fdio/vpp - Gitiles

 /*
  *------------------------------------------------------------------
  * Copyright (c) 2017 Cisco and/or its affiliates.
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *------------------------------------------------------------------
  */

 #ifndef _VNET_DEVICES_VIRTIO_VIRTIO_H_
 #define _VNET_DEVICES_VIRTIO_VIRTIO_H_

 #include <vnet/devices/virtio/virtio_std.h>
 #include <vnet/devices/virtio/vhost_std.h>
 #include <vnet/devices/virtio/virtio_buffering.h>
 #include <vnet/gso/gro.h>
 #include <vnet/interface.h>

 #define foreach_virtio_if_flag		\
   _(0, ADMIN_UP, "admin-up")		\
   _(1, DELETING, "deleting")

 typedef enum
 {
 #define _(a, b, c) VIRTIO_IF_FLAG_##b = (1 << a),
   foreach_virtio_if_flag
 #undef _
 } virtio_if_flag_t;

 #define TX_QUEUE(X) ((X*2) + 1)
 #define RX_QUEUE(X) (X*2)
 #define TX_QUEUE_ACCESS(X) (X/2)
 #define RX_QUEUE_ACCESS(X) (X/2)

 #define VIRTIO_NUM_RX_DESC 256
 #define VIRTIO_NUM_TX_DESC 256

 #define foreach_virtio_if_types \
   _ (TAP, 0)                    \
   _ (TUN, 1)                    \
   _ (PCI, 2)

 typedef enum
 {
 #define _(a, b) VIRTIO_IF_TYPE_##a = (1 << b),
   foreach_virtio_if_types
 #undef _
     VIRTIO_IF_N_TYPES = (1 << 3),
 } virtio_if_type_t;

 #define VIRTIO_RING_FLAG_MASK_INT 1

 #define VIRTIO_EVENT_START_TIMER 1
 #define VIRTIO_EVENT_STOP_TIMER 2

 typedef struct
 {
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
   clib_spinlock_t lockp;
   union
   {
     struct
     {
       vnet_virtio_vring_desc_t *desc;
       vnet_virtio_vring_used_t *used;
       vnet_virtio_vring_avail_t *avail;
     };
     struct
     {
       vnet_virtio_vring_packed_desc_t *packed_desc;
       vnet_virtio_vring_desc_event_t *driver_event;
       vnet_virtio_vring_desc_event_t *device_event;
     };
   };
   u32 *buffers;
   u16 queue_size;
   u16 queue_id;
   u32 queue_index;
   u16 desc_in_use;
   u16 desc_next;
   u16 last_used_idx;
   u16 last_kick_avail_idx;
   union
   {
     struct
     {
       int kick_fd;
       int call_fd;
       u32 call_file_index;
     };
     struct
     {
       u16 avail_wrap_counter;
       u16 used_wrap_counter;
       u16 queue_notify_offset;
     };
   };
 #define VRING_TX_OUT_OF_ORDER 1
 #define VRING_TX_SCHEDULED    2
   u16 flags;
   u8 buffer_pool_index;
   vnet_hw_if_rx_mode mode;
   virtio_vring_buffering_t *buffering;
   gro_flow_table_t *flow_table;
 } vnet_virtio_vring_t;

 typedef union
 {
   struct
   {
     u16 domain;
     u8 bus;
     u8 slot:5;
     u8 function:3;
   };
   u32 as_u32;
 } pci_addr_t;

 /* forward declaration */
 typedef struct _virtio_pci_func virtio_pci_func_t;

 typedef struct
 {
   CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
   u64 features;
   u32 flags;
   u32 per_interface_next_index;
   u16 num_rxqs;
   u16 num_txqs;
   vnet_virtio_vring_t *rxq_vrings;
   vnet_virtio_vring_t *txq_vrings;
   int gso_enabled;
   int csum_offload_enabled;
   union
   {
     int *tap_fds;
     struct
     {
       u32 pci_dev_handle;
       u32 msix_enabled;
     };
   };
   u16 virtio_net_hdr_sz;
   virtio_if_type_t type;

   u32 hw_if_index;
   u32 sw_if_index;

     CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
   int packet_coalesce;
   int packet_buffering;
   u32 dev_instance;
   u32 numa_node;
   u64 remote_features;

   /* error */
   clib_error_t *error;
   union
   {
     struct
     {
       u32 mac_addr32;
       u16 mac_addr16;
     };
     u8 mac_addr[6];
   };
   union
   {
     struct			/* tun/tap interface */
     {
       ip6_address_t host_ip6_addr;
       int *vhost_fds;
       u8 *host_if_name;
       u8 *net_ns;
       u8 *host_bridge;
       u8 host_mac_addr[6];
       u32 id;
       u32 host_mtu_size;
       u32 tap_flags;
       int ifindex;
       ip4_address_t host_ip4_addr;
       u8 host_ip4_prefix_len;
       u8 host_ip6_prefix_len;
       u8 host_carrier_up;	/* host tun/tap driver link carrier state */
     };
     struct			/* native virtio */
     {
       void *bar;
       vnet_virtio_vring_t *cxq_vring;
       pci_addr_t pci_addr;
       u32 bar_id;
       u32 notify_off_multiplier;
       u32 is_modern;
       u16 common_offset;
       u16 notify_offset;
       u16 device_offset;
       u16 isr_offset;
       u16 max_queue_pairs;
       u16 msix_table_size;
       u8 support_int_mode;	/* support interrupt mode */
       u8 status;
     };
   };
   const virtio_pci_func_t *virtio_pci_func;
   int is_packed;
 } virtio_if_t;

 typedef struct
 {
   u32 gro_or_buffering_if_count;
   /* logging */
   vlib_log_class_t log_default;

   virtio_if_t *interfaces;
   u16 msg_id_base;
 } virtio_main_t;

 extern virtio_main_t virtio_main;
 extern vnet_device_class_t virtio_device_class;
 extern vlib_node_registration_t virtio_input_node;

 clib_error_t *virtio_vring_init (vlib_main_t * vm, virtio_if_t * vif, u16 idx,
 				 u16 sz);
 clib_error_t *virtio_vring_free_rx (vlib_main_t * vm, virtio_if_t * vif,
 				    u32 idx);
 clib_error_t *virtio_vring_free_tx (vlib_main_t * vm, virtio_if_t * vif,
 				    u32 idx);
 void virtio_vring_set_rx_queues (vlib_main_t *vm, virtio_if_t *vif);
 void virtio_vring_set_tx_queues (vlib_main_t *vm, virtio_if_t *vif);
 extern void virtio_free_buffers (vlib_main_t *vm, vnet_virtio_vring_t *vring);
 extern void virtio_set_net_hdr_size (virtio_if_t * vif);
 extern void virtio_show (vlib_main_t *vm, u32 *hw_if_indices, u8 show_descr,
 			 virtio_if_type_t type);
 extern void virtio_set_packet_coalesce (virtio_if_t * vif);
 clib_error_t *virtio_set_packet_buffering (virtio_if_t * vif, u16 size);
 extern void virtio_pci_legacy_notify_queue (vlib_main_t * vm,
 					    virtio_if_t * vif, u16 queue_id,
 					    u16 queue_notify_offset);
 extern void virtio_pci_modern_notify_queue (vlib_main_t * vm,
 					    virtio_if_t * vif, u16 queue_id,
 					    u16 queue_notify_offset);
 extern void virtio_pre_input_node_enable (vlib_main_t *vm, virtio_if_t *vif);
 extern void virtio_pre_input_node_disable (vlib_main_t *vm, virtio_if_t *vif);

 format_function_t format_virtio_device_name;
 format_function_t format_virtio_log_name;

 static_always_inline void
 virtio_kick (vlib_main_t *vm, vnet_virtio_vring_t *vring, virtio_if_t *vif)
 {
   if (vif->type == VIRTIO_IF_TYPE_PCI)
     {
       if (vif->is_modern)
 	virtio_pci_modern_notify_queue (vm, vif, vring->queue_id,
 					vring->queue_notify_offset);
       else
 	virtio_pci_legacy_notify_queue (vm, vif, vring->queue_id,
 					vring->queue_notify_offset);
     }
   else
     {
       u64 x = 1;
       int __clib_unused r;

       r = write (vring->kick_fd, &x, sizeof (x));
       vring->last_kick_avail_idx = vring->avail->idx;
     }
 }

 static_always_inline u8
 virtio_txq_is_scheduled (vnet_virtio_vring_t *vring)
 {
   if (vring)
     return (vring->flags & VRING_TX_SCHEDULED);
   return 1;
 }

 static_always_inline void
 virtio_txq_set_scheduled (vnet_virtio_vring_t *vring)
 {
   if (vring)
     vring->flags |= VRING_TX_SCHEDULED;
 }

 static_always_inline void
 virtio_txq_clear_scheduled (vnet_virtio_vring_t *vring)
 {
   if (vring)
     vring->flags &= ~VRING_TX_SCHEDULED;
 }

 static_always_inline void
 vnet_virtio_vring_init (vnet_virtio_vring_t *vring, u16 queue_size, void *p,
 			u32 align)
 {
   vring->queue_size = queue_size;
   vring->desc = p;
   vring->avail =
     (vnet_virtio_vring_avail_t *) ((char *) p +
 				   queue_size *
 				     sizeof (vnet_virtio_vring_desc_t));
   vring->used =
     (vnet_virtio_vring_used_t
        *) ((char *) p + ((sizeof (vnet_virtio_vring_desc_t) * queue_size +
 			  sizeof (u16) * (3 + queue_size) + align - 1) &
 			 ~(align - 1)));
   vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
 }

 static_always_inline u16
 vnet_virtio_vring_size (u16 queue_size, u32 align)
 {
   return ((sizeof (vnet_virtio_vring_desc_t) * queue_size +
 	   sizeof (u16) * (3 + queue_size) + align - 1) &
 	  ~(align - 1)) +
 	 sizeof (u16) * 3 +
 	 sizeof (vnet_virtio_vring_used_elem_t) * queue_size;
 }

 #define virtio_log_debug(vif, f, ...)				\
 {								\
   vlib_log(VLIB_LOG_LEVEL_DEBUG, virtio_main.log_default,	\
 	   "%U: " f, format_virtio_log_name, vif,		\
            ##__VA_ARGS__);					\
 };

 #define virtio_log_warning(vif, f, ...)				\
 {								\
   vlib_log(VLIB_LOG_LEVEL_WARNING, virtio_main.log_default,	\
 	   "%U: " f, format_virtio_log_name, vif,		\
            ##__VA_ARGS__);					\
 };

 #define virtio_log_error(vif, f, ...)				\
 {								\
   vlib_log(VLIB_LOG_LEVEL_ERR, virtio_main.log_default,		\
 	   "%U: " f, format_virtio_log_name, vif,		\
            ##__VA_ARGS__);					\
 };

 #endif /* _VNET_DEVICES_VIRTIO_VIRTIO_H_ */

 /*
  * fd.io coding-style-patch-verification: ON
  *
  * Local Variables:
  * eval: (c-set-style "gnu")
  * End:
  */
	/*
	*------------------------------------------------------------------
	* Copyright (c) 2017 Cisco and/or its affiliates.
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at:
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*------------------------------------------------------------------
	*/

	#ifndef _VNET_DEVICES_VIRTIO_VIRTIO_H_
	#define _VNET_DEVICES_VIRTIO_VIRTIO_H_

	#include <vnet/devices/virtio/virtio_std.h>
	#include <vnet/devices/virtio/vhost_std.h>
	#include <vnet/devices/virtio/virtio_buffering.h>
	#include <vnet/gso/gro.h>
	#include <vnet/interface.h>

	#define foreach_virtio_if_flag \
	_(0, ADMIN_UP, "admin-up") \
	_(1, DELETING, "deleting")

	typedef enum
	{
	#define _(a, b, c) VIRTIO_IF_FLAG_##b = (1 << a),
	foreach_virtio_if_flag
	#undef _
	} virtio_if_flag_t;

	#define TX_QUEUE(X) ((X*2) + 1)
	#define RX_QUEUE(X) (X*2)
	#define TX_QUEUE_ACCESS(X) (X/2)
	#define RX_QUEUE_ACCESS(X) (X/2)

	#define VIRTIO_NUM_RX_DESC 256
	#define VIRTIO_NUM_TX_DESC 256

	#define foreach_virtio_if_types \
	_ (TAP, 0) \
	_ (TUN, 1) \
	_ (PCI, 2)

	typedef enum
	{
	#define _(a, b) VIRTIO_IF_TYPE_##a = (1 << b),
	foreach_virtio_if_types
	#undef _
	VIRTIO_IF_N_TYPES = (1 << 3),
	} virtio_if_type_t;

	#define VIRTIO_RING_FLAG_MASK_INT 1

	#define VIRTIO_EVENT_START_TIMER 1
	#define VIRTIO_EVENT_STOP_TIMER 2

	typedef struct
	{
	CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
	clib_spinlock_t lockp;
	union
	{
	struct
	{
	vnet_virtio_vring_desc_t *desc;
	vnet_virtio_vring_used_t *used;
	vnet_virtio_vring_avail_t *avail;
	};
	struct
	{
	vnet_virtio_vring_packed_desc_t *packed_desc;
	vnet_virtio_vring_desc_event_t *driver_event;
	vnet_virtio_vring_desc_event_t *device_event;
	};
	};
	u32 *buffers;
	u16 queue_size;
	u16 queue_id;
	u32 queue_index;
	u16 desc_in_use;
	u16 desc_next;
	u16 last_used_idx;
	u16 last_kick_avail_idx;
	union
	{
	struct
	{
	int kick_fd;
	int call_fd;
	u32 call_file_index;
	};
	struct
	{
	u16 avail_wrap_counter;
	u16 used_wrap_counter;
	u16 queue_notify_offset;
	};
	};
	#define VRING_TX_OUT_OF_ORDER 1
	#define VRING_TX_SCHEDULED 2
	u16 flags;
	u8 buffer_pool_index;
	vnet_hw_if_rx_mode mode;
	virtio_vring_buffering_t *buffering;
	gro_flow_table_t *flow_table;
	} vnet_virtio_vring_t;

	typedef union
	{
	struct
	{
	u16 domain;
	u8 bus;
	u8 slot:5;
	u8 function:3;
	};
	u32 as_u32;
	} pci_addr_t;

	/* forward declaration */
	typedef struct _virtio_pci_func virtio_pci_func_t;

	typedef struct
	{
	CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
	u64 features;
	u32 flags;
	u32 per_interface_next_index;
	u16 num_rxqs;
	u16 num_txqs;
	vnet_virtio_vring_t *rxq_vrings;
	vnet_virtio_vring_t *txq_vrings;
	int gso_enabled;
	int csum_offload_enabled;
	union
	{
	int *tap_fds;
	struct
	{
	u32 pci_dev_handle;
	u32 msix_enabled;
	};
	};
	u16 virtio_net_hdr_sz;
	virtio_if_type_t type;

	u32 hw_if_index;
	u32 sw_if_index;

	CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
	int packet_coalesce;
	int packet_buffering;
	u32 dev_instance;
	u32 numa_node;
	u64 remote_features;

	/* error */
	clib_error_t *error;
	union
	{
	struct
	{
	u32 mac_addr32;
	u16 mac_addr16;
	};
	u8 mac_addr[6];
	};
	union
	{
	struct /* tun/tap interface */
	{
	ip6_address_t host_ip6_addr;
	int *vhost_fds;
	u8 *host_if_name;
	u8 *net_ns;
	u8 *host_bridge;
	u8 host_mac_addr[6];
	u32 id;
	u32 host_mtu_size;
	u32 tap_flags;
	int ifindex;
	ip4_address_t host_ip4_addr;
	u8 host_ip4_prefix_len;
	u8 host_ip6_prefix_len;
	u8 host_carrier_up; /* host tun/tap driver link carrier state */
	};
	struct /* native virtio */
	{
	void *bar;
	vnet_virtio_vring_t *cxq_vring;
	pci_addr_t pci_addr;
	u32 bar_id;
	u32 notify_off_multiplier;
	u32 is_modern;
	u16 common_offset;
	u16 notify_offset;
	u16 device_offset;
	u16 isr_offset;
	u16 max_queue_pairs;
	u16 msix_table_size;
	u8 support_int_mode; /* support interrupt mode */
	u8 status;
	};
	};
	const virtio_pci_func_t *virtio_pci_func;
	int is_packed;
	} virtio_if_t;

	typedef struct
	{
	u32 gro_or_buffering_if_count;
	/* logging */
	vlib_log_class_t log_default;

	virtio_if_t *interfaces;
	u16 msg_id_base;
	} virtio_main_t;

	extern virtio_main_t virtio_main;
	extern vnet_device_class_t virtio_device_class;
	extern vlib_node_registration_t virtio_input_node;

	clib_error_t virtio_vring_init (vlib_main_t vm, virtio_if_t * vif, u16 idx,
	u16 sz);
	clib_error_t virtio_vring_free_rx (vlib_main_t vm, virtio_if_t * vif,
	u32 idx);
	clib_error_t virtio_vring_free_tx (vlib_main_t vm, virtio_if_t * vif,
	u32 idx);
	void virtio_vring_set_rx_queues (vlib_main_t vm, virtio_if_t vif);
	void virtio_vring_set_tx_queues (vlib_main_t vm, virtio_if_t vif);
	extern void virtio_free_buffers (vlib_main_t vm, vnet_virtio_vring_t vring);
	extern void virtio_set_net_hdr_size (virtio_if_t * vif);
	extern void virtio_show (vlib_main_t vm, u32 hw_if_indices, u8 show_descr,
	virtio_if_type_t type);
	extern void virtio_set_packet_coalesce (virtio_if_t * vif);
	clib_error_t virtio_set_packet_buffering (virtio_if_t vif, u16 size);
	extern void virtio_pci_legacy_notify_queue (vlib_main_t * vm,
	virtio_if_t * vif, u16 queue_id,
	u16 queue_notify_offset);
	extern void virtio_pci_modern_notify_queue (vlib_main_t * vm,
	virtio_if_t * vif, u16 queue_id,
	u16 queue_notify_offset);
	extern void virtio_pre_input_node_enable (vlib_main_t vm, virtio_if_t vif);
	extern void virtio_pre_input_node_disable (vlib_main_t vm, virtio_if_t vif);

	format_function_t format_virtio_device_name;
	format_function_t format_virtio_log_name;

	static_always_inline void
	virtio_kick (vlib_main_t vm, vnet_virtio_vring_t vring, virtio_if_t *vif)
	{
	if (vif->type == VIRTIO_IF_TYPE_PCI)
	{
	if (vif->is_modern)
	virtio_pci_modern_notify_queue (vm, vif, vring->queue_id,
	vring->queue_notify_offset);
	else
	virtio_pci_legacy_notify_queue (vm, vif, vring->queue_id,
	vring->queue_notify_offset);
	}
	else
	{
	u64 x = 1;
	int __clib_unused r;

	r = write (vring->kick_fd, &x, sizeof (x));
	vring->last_kick_avail_idx = vring->avail->idx;
	}
	}

	static_always_inline u8
	virtio_txq_is_scheduled (vnet_virtio_vring_t *vring)
	{
	if (vring)
	return (vring->flags & VRING_TX_SCHEDULED);
	return 1;
	}

	static_always_inline void
	virtio_txq_set_scheduled (vnet_virtio_vring_t *vring)
	{
	if (vring)
	vring->flags \|= VRING_TX_SCHEDULED;
	}

	static_always_inline void
	virtio_txq_clear_scheduled (vnet_virtio_vring_t *vring)
	{
	if (vring)
	vring->flags &= ~VRING_TX_SCHEDULED;
	}

	static_always_inline void
	vnet_virtio_vring_init (vnet_virtio_vring_t vring, u16 queue_size, void p,
	u32 align)
	{
	vring->queue_size = queue_size;
	vring->desc = p;
	vring->avail =
	(vnet_virtio_vring_avail_t ) ((char ) p +
	queue_size *
	sizeof (vnet_virtio_vring_desc_t));
	vring->used =
	(vnet_virtio_vring_used_t
	) ((char ) p + ((sizeof (vnet_virtio_vring_desc_t) * queue_size +
	sizeof (u16) * (3 + queue_size) + align - 1) &
	~(align - 1)));
	vring->avail->flags = VIRTIO_RING_FLAG_MASK_INT;
	}

	static_always_inline u16
	vnet_virtio_vring_size (u16 queue_size, u32 align)
	{
	return ((sizeof (vnet_virtio_vring_desc_t) * queue_size +
	sizeof (u16) * (3 + queue_size) + align - 1) &
	~(align - 1)) +
	sizeof (u16) * 3 +
	sizeof (vnet_virtio_vring_used_elem_t) * queue_size;
	}

	#define virtio_log_debug(vif, f, ...) \
	{ \
	vlib_log(VLIB_LOG_LEVEL_DEBUG, virtio_main.log_default, \
	"%U: " f, format_virtio_log_name, vif, \
	##__VA_ARGS__); \
	};

	#define virtio_log_warning(vif, f, ...) \
	{ \
	vlib_log(VLIB_LOG_LEVEL_WARNING, virtio_main.log_default, \
	"%U: " f, format_virtio_log_name, vif, \
	##__VA_ARGS__); \
	};

	#define virtio_log_error(vif, f, ...) \
	{ \
	vlib_log(VLIB_LOG_LEVEL_ERR, virtio_main.log_default, \
	"%U: " f, format_virtio_log_name, vif, \
	##__VA_ARGS__); \
	};

	#endif /* _VNET_DEVICES_VIRTIO_VIRTIO_H_ */

	/*
	* fd.io coding-style-patch-verification: ON
	*
	* Local Variables:
	* eval: (c-set-style "gnu")
	* End:
	*/