/******************************************************************************
* arch/xen/drivers/netif/backend/common.h
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation; or, when distributed
+ * separately from the Linux kernel or incorporated into other
+ * software packages, subject to the following license:
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this source file (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use, copy, modify,
+ * merge, publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
*/
#ifndef __NETIF__BACKEND__COMMON_H__
#include <linux/in.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
-#include <asm-xen/ctrl_if.h>
-#include <asm-xen/xen-public/io/netif.h>
+#include <linux/wait.h>
+#include <xen/evtchn.h>
+#include <xen/interface/io/netif.h>
#include <asm/io.h>
#include <asm/pgalloc.h>
-
-#if 0
-#define ASSERT(_p) \
- if ( !(_p) ) { printk("Assertion '%s' failed, line %d, file %s", #_p , \
- __LINE__, __FILE__); *(int*)0=0; }
-#define DPRINTK(_f, _a...) printk(KERN_ALERT "(file=%s, line=%d) " _f, \
- __FILE__ , __LINE__ , ## _a )
-#else
-#define ASSERT(_p) ((void)0)
-#define DPRINTK(_f, _a...) ((void)0)
-#endif
+#include <xen/interface/grant_table.h>
+#include <xen/gnttab.h>
+#include <xen/driver_util.h>
+
+#define DPRINTK(_f, _a...) \
+ pr_debug("(file=%s, line=%d) " _f, \
+ __FILE__ , __LINE__ , ## _a )
+#define IPRINTK(fmt, args...) \
+ printk(KERN_INFO "xen_net: " fmt, ##args)
+#define WPRINTK(fmt, args...) \
+ printk(KERN_WARNING "xen_net: " fmt, ##args)
typedef struct netif_st {
- /* Unique identifier for this interface. */
- domid_t domid;
- unsigned int handle;
-
- u8 fe_dev_addr[6];
-
- /* Physical parameters of the comms window. */
- unsigned long tx_shmem_frame;
- unsigned long rx_shmem_frame;
- unsigned int evtchn;
- int irq;
-
- /* The shared rings and indexes. */
- netif_tx_interface_t *tx;
- netif_rx_interface_t *rx;
-
- /* Private indexes into shared ring. */
- NETIF_RING_IDX rx_req_cons;
- NETIF_RING_IDX rx_resp_prod; /* private version of shared variable */
- NETIF_RING_IDX tx_req_cons;
- NETIF_RING_IDX tx_resp_prod; /* private version of shared variable */
-
- /* Transmit shaping: allow 'credit_bytes' every 'credit_usec'. */
- unsigned long credit_bytes;
- unsigned long credit_usec;
- unsigned long remaining_credit;
- struct timer_list credit_timeout;
-
- /* Miscellaneous private stuff. */
- enum { DISCONNECTED, DISCONNECTING, CONNECTED } status;
- int active;
- /*
- * DISCONNECT response is deferred until pending requests are ack'ed.
- * We therefore need to store the id from the original request.
- */
- u8 disconnect_rspid;
- struct netif_st *hash_next;
- struct list_head list; /* scheduling list */
- atomic_t refcnt;
- struct net_device *dev;
- struct net_device_stats stats;
-
- struct work_struct work;
+ /* Unique identifier for this interface. */
+ domid_t domid;
+ unsigned int handle;
+
+ u8 fe_dev_addr[6];
+
+ /* Physical parameters of the comms window. */
+ grant_handle_t tx_shmem_handle;
+ grant_ref_t tx_shmem_ref;
+ grant_handle_t rx_shmem_handle;
+ grant_ref_t rx_shmem_ref;
+ unsigned int evtchn;
+ unsigned int irq;
+
+ /* The shared rings and indexes. */
+ netif_tx_back_ring_t tx;
+ netif_rx_back_ring_t rx;
+ struct vm_struct *tx_comms_area;
+ struct vm_struct *rx_comms_area;
+
+ /* Set of features that can be turned on in dev->features. */
+ int features;
+ int can_queue;
+
+ /* Allow netif_be_start_xmit() to peek ahead in the rx request ring. */
+ RING_IDX rx_req_cons_peek;
+
+ /* Transmit shaping: allow 'credit_bytes' every 'credit_usec'. */
+ unsigned long credit_bytes;
+ unsigned long credit_usec;
+ unsigned long remaining_credit;
+ struct timer_list credit_timeout;
+
+ /* Miscellaneous private stuff. */
+ struct list_head list; /* scheduling list */
+ atomic_t refcnt;
+ struct net_device *dev;
+ struct net_device_stats stats;
+
+ wait_queue_head_t waiting_to_free;
} netif_t;
-void netif_create(netif_be_create_t *create);
-void netif_destroy(netif_be_destroy_t *destroy);
-void netif_creditlimit(netif_be_creditlimit_t *creditlimit);
-void netif_connect(netif_be_connect_t *connect);
-int netif_disconnect(netif_be_disconnect_t *disconnect, u8 rsp_id);
-void netif_disconnect_complete(netif_t *netif);
-netif_t *netif_find_by_handle(domid_t domid, unsigned int handle);
+#define NET_TX_RING_SIZE __RING_SIZE((netif_tx_sring_t *)0, PAGE_SIZE)
+#define NET_RX_RING_SIZE __RING_SIZE((netif_rx_sring_t *)0, PAGE_SIZE)
+
+void netif_disconnect(netif_t *netif);
+
+netif_t *netif_alloc(domid_t domid, unsigned int handle, u8 be_mac[ETH_ALEN]);
+int netif_map(netif_t *netif, unsigned long tx_ring_ref,
+ unsigned long rx_ring_ref, unsigned int evtchn);
+
#define netif_get(_b) (atomic_inc(&(_b)->refcnt))
-#define netif_put(_b) \
- do { \
- if ( atomic_dec_and_test(&(_b)->refcnt) ) \
- netif_disconnect_complete(_b); \
- } while (0)
+#define netif_put(_b) \
+ do { \
+ if ( atomic_dec_and_test(&(_b)->refcnt) ) \
+ wake_up(&(_b)->waiting_to_free); \
+ } while (0)
-void netif_interface_init(void);
-void netif_ctrlif_init(void);
+void netif_xenbus_init(void);
void netif_schedule_work(netif_t *netif);
void netif_deschedule_work(netif_t *netif);
struct net_device_stats *netif_be_get_stats(struct net_device *dev);
irqreturn_t netif_be_int(int irq, void *dev_id, struct pt_regs *regs);
+static inline int netbk_can_queue(struct net_device *dev)
+{
+ netif_t *netif = netdev_priv(dev);
+ return netif->can_queue;
+}
+
+static inline int netbk_can_sg(struct net_device *dev)
+{
+ netif_t *netif = netdev_priv(dev);
+ return netif->features & NETIF_F_SG;
+}
+
#endif /* __NETIF__BACKEND__COMMON_H__ */
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