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/* QLogic qed NIC Driver
* Copyright (c) 2015 QLogic Corporation
*
* This software is available under the terms of the GNU General Public License
* (GPL) Version 2, available from the file COPYING in the main directory of
* this source tree.
*/
#ifndef _QED_SRIOV_H
#define _QED_SRIOV_H
#include <linux/types.h>
#include "qed_vf.h"
#define QED_VF_ARRAY_LENGTH (3)
#define IS_VF(cdev) ((cdev)->b_is_vf)
#define IS_PF(cdev) (!((cdev)->b_is_vf))
#ifdef CONFIG_QED_SRIOV
#define IS_PF_SRIOV(p_hwfn) (!!((p_hwfn)->cdev->p_iov_info))
#else
#define IS_PF_SRIOV(p_hwfn) (0)
#endif
#define IS_PF_SRIOV_ALLOC(p_hwfn) (!!((p_hwfn)->pf_iov_info))
/* This struct is part of qed_dev and contains data relevant to all hwfns;
* Initialized only if SR-IOV cpabability is exposed in PCIe config space.
*/
struct qed_hw_sriov_info {
int pos; /* capability position */
int nres; /* number of resources */
u32 cap; /* SR-IOV Capabilities */
u16 ctrl; /* SR-IOV Control */
u16 total_vfs; /* total VFs associated with the PF */
u16 num_vfs; /* number of vfs that have been started */
u16 initial_vfs; /* initial VFs associated with the PF */
u16 nr_virtfn; /* number of VFs available */
u16 offset; /* first VF Routing ID offset */
u16 stride; /* following VF stride */
u16 vf_device_id; /* VF device id */
u32 pgsz; /* page size for BAR alignment */
u8 link; /* Function Dependency Link */
u32 first_vf_in_pf;
};
/* This mailbox is maintained per VF in its PF contains all information
* required for sending / receiving a message.
*/
struct qed_iov_vf_mbx {
union vfpf_tlvs *req_virt;
dma_addr_t req_phys;
union pfvf_tlvs *reply_virt;
dma_addr_t reply_phys;
};
enum vf_state {
VF_STOPPED /* VF, Stopped */
};
/* PFs maintain an array of this structure, per VF */
struct qed_vf_info {
struct qed_iov_vf_mbx vf_mbx;
enum vf_state state;
bool b_init;
struct qed_bulletin bulletin;
dma_addr_t vf_bulletin;
u32 concrete_fid;
u16 opaque_fid;
u8 vport_id;
u8 relative_vf_id;
u8 abs_vf_id;
#define QED_VF_ABS_ID(p_hwfn, p_vf) (QED_PATH_ID(p_hwfn) ? \
(p_vf)->abs_vf_id + MAX_NUM_VFS_BB : \
(p_vf)->abs_vf_id)
};
/* This structure is part of qed_hwfn and used only for PFs that have sriov
* capability enabled.
*/
struct qed_pf_iov {
struct qed_vf_info vfs_array[MAX_NUM_VFS];
u64 pending_events[QED_VF_ARRAY_LENGTH];
u64 pending_flr[QED_VF_ARRAY_LENGTH];
/* Allocate message address continuosuly and split to each VF */
void *mbx_msg_virt_addr;
dma_addr_t mbx_msg_phys_addr;
u32 mbx_msg_size;
void *mbx_reply_virt_addr;
dma_addr_t mbx_reply_phys_addr;
u32 mbx_reply_size;
void *p_bulletins;
dma_addr_t bulletins_phys;
u32 bulletins_size;
};
#ifdef CONFIG_QED_SRIOV
/**
* @brief - Given a VF index, return index of next [including that] active VF.
*
* @param p_hwfn
* @param rel_vf_id
*
* @return MAX_NUM_VFS in case no further active VFs, otherwise index.
*/
u16 qed_iov_get_next_active_vf(struct qed_hwfn *p_hwfn, u16 rel_vf_id);
/**
* @brief Read sriov related information and allocated resources
* reads from configuraiton space, shmem, etc.
*
* @param p_hwfn
*
* @return int
*/
int qed_iov_hw_info(struct qed_hwfn *p_hwfn);
/**
* @brief qed_iov_alloc - allocate sriov related resources
*
* @param p_hwfn
*
* @return int
*/
int qed_iov_alloc(struct qed_hwfn *p_hwfn);
/**
* @brief qed_iov_setup - setup sriov related resources
*
* @param p_hwfn
* @param p_ptt
*/
void qed_iov_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt);
/**
* @brief qed_iov_free - free sriov related resources
*
* @param p_hwfn
*/
void qed_iov_free(struct qed_hwfn *p_hwfn);
/**
* @brief free sriov related memory that was allocated during hw_prepare
*
* @param cdev
*/
void qed_iov_free_hw_info(struct qed_dev *cdev);
#else
static inline u16 qed_iov_get_next_active_vf(struct qed_hwfn *p_hwfn,
u16 rel_vf_id)
{
return MAX_NUM_VFS;
}
static inline int qed_iov_hw_info(struct qed_hwfn *p_hwfn)
{
return 0;
}
static inline int qed_iov_alloc(struct qed_hwfn *p_hwfn)
{
return 0;
}
static inline void qed_iov_setup(struct qed_hwfn *p_hwfn, struct qed_ptt *p_ptt)
{
}
static inline void qed_iov_free(struct qed_hwfn *p_hwfn)
{
}
static inline void qed_iov_free_hw_info(struct qed_dev *cdev)
{
}
#endif
#define qed_for_each_vf(_p_hwfn, _i) \
for (_i = qed_iov_get_next_active_vf(_p_hwfn, 0); \
_i < MAX_NUM_VFS; \
_i = qed_iov_get_next_active_vf(_p_hwfn, _i + 1))
#endif
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