drivers/net/ethernet/cisco/enic/enic.h - linux - Git at Google

 /*
  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
  *
  * This program is free software; you may redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; version 2 of the License.
  *
  * 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 _ENIC_H_
 #define _ENIC_H_

 #include "vnic_enet.h"
 #include "vnic_dev.h"
 #include "vnic_wq.h"
 #include "vnic_rq.h"
 #include "vnic_cq.h"
 #include "vnic_intr.h"
 #include "vnic_stats.h"
 #include "vnic_nic.h"
 #include "vnic_rss.h"
 #include <linux/irq.h>

 #define DRV_NAME		"enic"
 #define DRV_DESCRIPTION		"Cisco VIC Ethernet NIC Driver"
 #define DRV_VERSION		"2.3.0.53"
 #define DRV_COPYRIGHT		"Copyright 2008-2013 Cisco Systems, Inc"

 #define ENIC_BARS_MAX		6

 #define ENIC_WQ_MAX		8
 #define ENIC_RQ_MAX		8
 #define ENIC_CQ_MAX		(ENIC_WQ_MAX + ENIC_RQ_MAX)
 #define ENIC_INTR_MAX		(ENIC_CQ_MAX + 2)

 #define ENIC_WQ_NAPI_BUDGET	256

 #define ENIC_AIC_LARGE_PKT_DIFF	3

 struct enic_msix_entry {
 	int requested;
 	char devname[IFNAMSIZ + 8];
 	irqreturn_t (*isr)(int, void *);
 	void *devid;
 	cpumask_var_t affinity_mask;
 };

 /* Store only the lower range.  Higher range is given by fw. */
 struct enic_intr_mod_range {
 	u32 small_pkt_range_start;
 	u32 large_pkt_range_start;
 };

 struct enic_intr_mod_table {
 	u32 rx_rate;
 	u32 range_percent;
 };

 #define ENIC_MAX_LINK_SPEEDS		3
 #define ENIC_LINK_SPEED_10G		10000
 #define ENIC_LINK_SPEED_4G		4000
 #define ENIC_LINK_40G_INDEX		2
 #define ENIC_LINK_10G_INDEX		1
 #define ENIC_LINK_4G_INDEX		0
 #define ENIC_RX_COALESCE_RANGE_END	125
 #define ENIC_AIC_TS_BREAK		100

 struct enic_rx_coal {
 	u32 small_pkt_range_start;
 	u32 large_pkt_range_start;
 	u32 range_end;
 	u32 use_adaptive_rx_coalesce;
 };

 /* priv_flags */
 #define ENIC_SRIOV_ENABLED		(1 << 0)

 /* enic port profile set flags */
 #define ENIC_PORT_REQUEST_APPLIED	(1 << 0)
 #define ENIC_SET_REQUEST		(1 << 1)
 #define ENIC_SET_NAME			(1 << 2)
 #define ENIC_SET_INSTANCE		(1 << 3)
 #define ENIC_SET_HOST			(1 << 4)

 struct enic_port_profile {
 	u32 set;
 	u8 request;
 	char name[PORT_PROFILE_MAX];
 	u8 instance_uuid[PORT_UUID_MAX];
 	u8 host_uuid[PORT_UUID_MAX];
 	u8 vf_mac[ETH_ALEN];
 	u8 mac_addr[ETH_ALEN];
 };

 /* enic_rfs_fltr_node - rfs filter node in hash table
  *	@@keys: IPv4 5 tuple
  *	@flow_id: flow_id of clsf filter provided by kernel
  *	@fltr_id: filter id of clsf filter returned by adaptor
  *	@rq_id: desired rq index
  *	@node: hlist_node
  */
 struct enic_rfs_fltr_node {
 	struct flow_keys keys;
 	u32 flow_id;
 	u16 fltr_id;
 	u16 rq_id;
 	struct hlist_node node;
 };

 /* enic_rfs_flw_tbl - rfs flow table
  *	@max: Maximum number of filters vNIC supports
  *	@free: Number of free filters available
  *	@toclean: hash table index to clean next
  *	@ht_head: hash table list head
  *	@lock: spin lock
  *	@rfs_may_expire: timer function for enic_rps_may_expire_flow
  */
 struct enic_rfs_flw_tbl {
 	u16 max;
 	int free;

 #define ENIC_RFS_FLW_BITSHIFT	(10)
 #define ENIC_RFS_FLW_MASK	((1 << ENIC_RFS_FLW_BITSHIFT) - 1)
 	u16 toclean:ENIC_RFS_FLW_BITSHIFT;
 	struct hlist_head ht_head[1 << ENIC_RFS_FLW_BITSHIFT];
 	spinlock_t lock;
 	struct timer_list rfs_may_expire;
 };

 struct vxlan_offload {
 	u16 vxlan_udp_port_number;
 	u8 patch_level;
 	u8 flags;
 };

 /* Per-instance private data structure */
 struct enic {
 	struct net_device *netdev;
 	struct pci_dev *pdev;
 	struct vnic_enet_config config;
 	struct vnic_dev_bar bar[ENIC_BARS_MAX];
 	struct vnic_dev *vdev;
 	struct timer_list notify_timer;
 	struct work_struct reset;
 	struct work_struct tx_hang_reset;
 	struct work_struct change_mtu_work;
 	struct msix_entry msix_entry[ENIC_INTR_MAX];
 	struct enic_msix_entry msix[ENIC_INTR_MAX];
 	u32 msg_enable;
 	spinlock_t devcmd_lock;
 	u8 mac_addr[ETH_ALEN];
 	unsigned int flags;
 	unsigned int priv_flags;
 	unsigned int mc_count;
 	unsigned int uc_count;
 	u32 port_mtu;
 	struct enic_rx_coal rx_coalesce_setting;
 	u32 rx_coalesce_usecs;
 	u32 tx_coalesce_usecs;
 #ifdef CONFIG_PCI_IOV
 	u16 num_vfs;
 #endif
 	spinlock_t enic_api_lock;
 	struct enic_port_profile *pp;

 	/* work queue cache line section */
 	____cacheline_aligned struct vnic_wq wq[ENIC_WQ_MAX];
 	spinlock_t wq_lock[ENIC_WQ_MAX];
 	unsigned int wq_count;
 	u16 loop_enable;
 	u16 loop_tag;

 	/* receive queue cache line section */
 	____cacheline_aligned struct vnic_rq rq[ENIC_RQ_MAX];
 	unsigned int rq_count;
 	struct vxlan_offload vxlan;
 	u64 rq_truncated_pkts;
 	u64 rq_bad_fcs;
 	struct napi_struct napi[ENIC_RQ_MAX + ENIC_WQ_MAX];

 	/* interrupt resource cache line section */
 	____cacheline_aligned struct vnic_intr intr[ENIC_INTR_MAX];
 	unsigned int intr_count;
 	u32 __iomem *legacy_pba;		/* memory-mapped */

 	/* completion queue cache line section */
 	____cacheline_aligned struct vnic_cq cq[ENIC_CQ_MAX];
 	unsigned int cq_count;
 	struct enic_rfs_flw_tbl rfs_h;
 	u32 rx_copybreak;
 	u8 rss_key[ENIC_RSS_LEN];
 	struct vnic_gen_stats gen_stats;
 };

 static inline struct net_device *vnic_get_netdev(struct vnic_dev *vdev)
 {
 	struct enic *enic = vdev->priv;

 	return enic->netdev;
 }

 /* wrappers function for kernel log
  */
 #define vdev_err(vdev, fmt, ...)					\
 	dev_err(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
 #define vdev_warn(vdev, fmt, ...)					\
 	dev_warn(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
 #define vdev_info(vdev, fmt, ...)					\
 	dev_info(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)

 #define vdev_neterr(vdev, fmt, ...)					\
 	netdev_err(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
 #define vdev_netwarn(vdev, fmt, ...)					\
 	netdev_warn(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
 #define vdev_netinfo(vdev, fmt, ...)					\
 	netdev_info(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)

 static inline struct device *enic_get_dev(struct enic *enic)
 {
 	return &(enic->pdev->dev);
 }

 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 {
 	return rq;
 }

 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 {
 	return enic->rq_count + wq;
 }

 static inline unsigned int enic_legacy_io_intr(void)
 {
 	return 0;
 }

 static inline unsigned int enic_legacy_err_intr(void)
 {
 	return 1;
 }

 static inline unsigned int enic_legacy_notify_intr(void)
 {
 	return 2;
 }

 static inline unsigned int enic_msix_rq_intr(struct enic *enic,
 	unsigned int rq)
 {
 	return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
 }

 static inline unsigned int enic_msix_wq_intr(struct enic *enic,
 	unsigned int wq)
 {
 	return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
 }

 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 {
 	return enic->rq_count + enic->wq_count;
 }

 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 {
 	return enic->rq_count + enic->wq_count + 1;
 }

 static inline bool enic_is_err_intr(struct enic *enic, int intr)
 {
 	switch (vnic_dev_get_intr_mode(enic->vdev)) {
 	case VNIC_DEV_INTR_MODE_INTX:
 		return intr == enic_legacy_err_intr();
 	case VNIC_DEV_INTR_MODE_MSIX:
 		return intr == enic_msix_err_intr(enic);
 	case VNIC_DEV_INTR_MODE_MSI:
 	default:
 		return false;
 	}
 }

 static inline bool enic_is_notify_intr(struct enic *enic, int intr)
 {
 	switch (vnic_dev_get_intr_mode(enic->vdev)) {
 	case VNIC_DEV_INTR_MODE_INTX:
 		return intr == enic_legacy_notify_intr();
 	case VNIC_DEV_INTR_MODE_MSIX:
 		return intr == enic_msix_notify_intr(enic);
 	case VNIC_DEV_INTR_MODE_MSI:
 	default:
 		return false;
 	}
 }

 static inline int enic_dma_map_check(struct enic *enic, dma_addr_t dma_addr)
 {
 	if (unlikely(pci_dma_mapping_error(enic->pdev, dma_addr))) {
 		net_warn_ratelimited("%s: PCI dma mapping failed!\n",
 				     enic->netdev->name);
 		enic->gen_stats.dma_map_error++;

 		return -ENOMEM;
 	}

 	return 0;
 }

 void enic_reset_addr_lists(struct enic *enic);
 int enic_sriov_enabled(struct enic *enic);
 int enic_is_valid_vf(struct enic *enic, int vf);
 int enic_is_dynamic(struct enic *enic);
 void enic_set_ethtool_ops(struct net_device *netdev);
 int __enic_set_rsskey(struct enic *enic);

 #endif /* _ENIC_H_ */
	/*
	* Copyright 2008-2010 Cisco Systems, Inc. All rights reserved.
	* Copyright 2007 Nuova Systems, Inc. All rights reserved.
	*
	* This program is free software; you may redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; version 2 of the License.
	*
	* 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 _ENIC_H_
	#define _ENIC_H_

	#include "vnic_enet.h"
	#include "vnic_dev.h"
	#include "vnic_wq.h"
	#include "vnic_rq.h"
	#include "vnic_cq.h"
	#include "vnic_intr.h"
	#include "vnic_stats.h"
	#include "vnic_nic.h"
	#include "vnic_rss.h"
	#include <linux/irq.h>

	#define DRV_NAME "enic"
	#define DRV_DESCRIPTION "Cisco VIC Ethernet NIC Driver"
	#define DRV_VERSION "2.3.0.53"
	#define DRV_COPYRIGHT "Copyright 2008-2013 Cisco Systems, Inc"

	#define ENIC_BARS_MAX 6

	#define ENIC_WQ_MAX 8
	#define ENIC_RQ_MAX 8
	#define ENIC_CQ_MAX (ENIC_WQ_MAX + ENIC_RQ_MAX)
	#define ENIC_INTR_MAX (ENIC_CQ_MAX + 2)

	#define ENIC_WQ_NAPI_BUDGET 256

	#define ENIC_AIC_LARGE_PKT_DIFF 3

	struct enic_msix_entry {
	int requested;
	char devname[IFNAMSIZ + 8];
	irqreturn_t (isr)(int, void );
	void *devid;
	cpumask_var_t affinity_mask;
	};

	/* Store only the lower range. Higher range is given by fw. */
	struct enic_intr_mod_range {
	u32 small_pkt_range_start;
	u32 large_pkt_range_start;
	};

	struct enic_intr_mod_table {
	u32 rx_rate;
	u32 range_percent;
	};

	#define ENIC_MAX_LINK_SPEEDS 3
	#define ENIC_LINK_SPEED_10G 10000
	#define ENIC_LINK_SPEED_4G 4000
	#define ENIC_LINK_40G_INDEX 2
	#define ENIC_LINK_10G_INDEX 1
	#define ENIC_LINK_4G_INDEX 0
	#define ENIC_RX_COALESCE_RANGE_END 125
	#define ENIC_AIC_TS_BREAK 100

	struct enic_rx_coal {
	u32 small_pkt_range_start;
	u32 large_pkt_range_start;
	u32 range_end;
	u32 use_adaptive_rx_coalesce;
	};

	/* priv_flags */
	#define ENIC_SRIOV_ENABLED (1 << 0)

	/* enic port profile set flags */
	#define ENIC_PORT_REQUEST_APPLIED (1 << 0)
	#define ENIC_SET_REQUEST (1 << 1)
	#define ENIC_SET_NAME (1 << 2)
	#define ENIC_SET_INSTANCE (1 << 3)
	#define ENIC_SET_HOST (1 << 4)

	struct enic_port_profile {
	u32 set;
	u8 request;
	char name[PORT_PROFILE_MAX];
	u8 instance_uuid[PORT_UUID_MAX];
	u8 host_uuid[PORT_UUID_MAX];
	u8 vf_mac[ETH_ALEN];
	u8 mac_addr[ETH_ALEN];
	};

	/* enic_rfs_fltr_node - rfs filter node in hash table
	* @@keys: IPv4 5 tuple
	* @flow_id: flow_id of clsf filter provided by kernel
	* @fltr_id: filter id of clsf filter returned by adaptor
	* @rq_id: desired rq index
	* @node: hlist_node
	*/
	struct enic_rfs_fltr_node {
	struct flow_keys keys;
	u32 flow_id;
	u16 fltr_id;
	u16 rq_id;
	struct hlist_node node;
	};

	/* enic_rfs_flw_tbl - rfs flow table
	* @max: Maximum number of filters vNIC supports
	* @free: Number of free filters available
	* @toclean: hash table index to clean next
	* @ht_head: hash table list head
	* @lock: spin lock
	* @rfs_may_expire: timer function for enic_rps_may_expire_flow
	*/
	struct enic_rfs_flw_tbl {
	u16 max;
	int free;

	#define ENIC_RFS_FLW_BITSHIFT (10)
	#define ENIC_RFS_FLW_MASK ((1 << ENIC_RFS_FLW_BITSHIFT) - 1)
	u16 toclean:ENIC_RFS_FLW_BITSHIFT;
	struct hlist_head ht_head[1 << ENIC_RFS_FLW_BITSHIFT];
	spinlock_t lock;
	struct timer_list rfs_may_expire;
	};

	struct vxlan_offload {
	u16 vxlan_udp_port_number;
	u8 patch_level;
	u8 flags;
	};

	/* Per-instance private data structure */
	struct enic {
	struct net_device *netdev;
	struct pci_dev *pdev;
	struct vnic_enet_config config;
	struct vnic_dev_bar bar[ENIC_BARS_MAX];
	struct vnic_dev *vdev;
	struct timer_list notify_timer;
	struct work_struct reset;
	struct work_struct tx_hang_reset;
	struct work_struct change_mtu_work;
	struct msix_entry msix_entry[ENIC_INTR_MAX];
	struct enic_msix_entry msix[ENIC_INTR_MAX];
	u32 msg_enable;
	spinlock_t devcmd_lock;
	u8 mac_addr[ETH_ALEN];
	unsigned int flags;
	unsigned int priv_flags;
	unsigned int mc_count;
	unsigned int uc_count;
	u32 port_mtu;
	struct enic_rx_coal rx_coalesce_setting;
	u32 rx_coalesce_usecs;
	u32 tx_coalesce_usecs;
	#ifdef CONFIG_PCI_IOV
	u16 num_vfs;
	#endif
	spinlock_t enic_api_lock;
	struct enic_port_profile *pp;

	/* work queue cache line section */
	____cacheline_aligned struct vnic_wq wq[ENIC_WQ_MAX];
	spinlock_t wq_lock[ENIC_WQ_MAX];
	unsigned int wq_count;
	u16 loop_enable;
	u16 loop_tag;

	/* receive queue cache line section */
	____cacheline_aligned struct vnic_rq rq[ENIC_RQ_MAX];
	unsigned int rq_count;
	struct vxlan_offload vxlan;
	u64 rq_truncated_pkts;
	u64 rq_bad_fcs;
	struct napi_struct napi[ENIC_RQ_MAX + ENIC_WQ_MAX];

	/* interrupt resource cache line section */
	____cacheline_aligned struct vnic_intr intr[ENIC_INTR_MAX];
	unsigned int intr_count;
	u32 __iomem legacy_pba; / memory-mapped */

	/* completion queue cache line section */
	____cacheline_aligned struct vnic_cq cq[ENIC_CQ_MAX];
	unsigned int cq_count;
	struct enic_rfs_flw_tbl rfs_h;
	u32 rx_copybreak;
	u8 rss_key[ENIC_RSS_LEN];
	struct vnic_gen_stats gen_stats;
	};

	static inline struct net_device vnic_get_netdev(struct vnic_dev vdev)
	{
	struct enic *enic = vdev->priv;

	return enic->netdev;
	}

	/* wrappers function for kernel log
	*/
	#define vdev_err(vdev, fmt, ...) \
	dev_err(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
	#define vdev_warn(vdev, fmt, ...) \
	dev_warn(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)
	#define vdev_info(vdev, fmt, ...) \
	dev_info(&(vdev)->pdev->dev, fmt, ##__VA_ARGS__)

	#define vdev_neterr(vdev, fmt, ...) \
	netdev_err(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
	#define vdev_netwarn(vdev, fmt, ...) \
	netdev_warn(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)
	#define vdev_netinfo(vdev, fmt, ...) \
	netdev_info(vnic_get_netdev(vdev), fmt, ##__VA_ARGS__)

	static inline struct device enic_get_dev(struct enic enic)
	{
	return &(enic->pdev->dev);
	}

	static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
	{
	return rq;
	}

	static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
	{
	return enic->rq_count + wq;
	}

	static inline unsigned int enic_legacy_io_intr(void)
	{
	return 0;
	}

	static inline unsigned int enic_legacy_err_intr(void)
	{
	return 1;
	}

	static inline unsigned int enic_legacy_notify_intr(void)
	{
	return 2;
	}

	static inline unsigned int enic_msix_rq_intr(struct enic *enic,
	unsigned int rq)
	{
	return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
	}

	static inline unsigned int enic_msix_wq_intr(struct enic *enic,
	unsigned int wq)
	{
	return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
	}

	static inline unsigned int enic_msix_err_intr(struct enic *enic)
	{
	return enic->rq_count + enic->wq_count;
	}

	static inline unsigned int enic_msix_notify_intr(struct enic *enic)
	{
	return enic->rq_count + enic->wq_count + 1;
	}

	static inline bool enic_is_err_intr(struct enic *enic, int intr)
	{
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
	return intr == enic_legacy_err_intr();
	case VNIC_DEV_INTR_MODE_MSIX:
	return intr == enic_msix_err_intr(enic);
	case VNIC_DEV_INTR_MODE_MSI:
	default:
	return false;
	}
	}

	static inline bool enic_is_notify_intr(struct enic *enic, int intr)
	{
	switch (vnic_dev_get_intr_mode(enic->vdev)) {
	case VNIC_DEV_INTR_MODE_INTX:
	return intr == enic_legacy_notify_intr();
	case VNIC_DEV_INTR_MODE_MSIX:
	return intr == enic_msix_notify_intr(enic);
	case VNIC_DEV_INTR_MODE_MSI:
	default:
	return false;
	}
	}

	static inline int enic_dma_map_check(struct enic *enic, dma_addr_t dma_addr)
	{
	if (unlikely(pci_dma_mapping_error(enic->pdev, dma_addr))) {
	net_warn_ratelimited("%s: PCI dma mapping failed!\n",
	enic->netdev->name);
	enic->gen_stats.dma_map_error++;

	return -ENOMEM;
	}

	return 0;
	}

	void enic_reset_addr_lists(struct enic *enic);
	int enic_sriov_enabled(struct enic *enic);
	int enic_is_valid_vf(struct enic *enic, int vf);
	int enic_is_dynamic(struct enic *enic);
	void enic_set_ethtool_ops(struct net_device *netdev);
	int __enic_set_rsskey(struct enic *enic);

	#endif /* _ENIC_H_ */