/* 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_SP_H
#define _QED_SP_H

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/list.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/qed/qed_chain.h>
#include "qed.h"
#include "qed_hsi.h"

enum spq_mode {
        QED_SPQ_MODE_BLOCK,     /* Client will poll a designated mem. address */
        QED_SPQ_MODE_CB,        /* Client supplies a callback */
        QED_SPQ_MODE_EBLOCK,    /* QED should block until completion */
};

struct qed_spq_comp_cb {
        void    (*function)(struct qed_hwfn *,
                            void *,
                            union event_ring_data *,
                            u8 fw_return_code);
        void    *cookie;
};

/**
 * @brief qed_eth_cqe_completion - handles the completion of a
 *        ramrod on the cqe ring
 *
 * @param p_hwfn
 * @param cqe
 *
 * @return int
 */
int qed_eth_cqe_completion(struct qed_hwfn *p_hwfn,
                           struct eth_slow_path_rx_cqe *cqe);

/**
 *  @file
 *
 *  QED Slow-hwfn queue interface
 */

union ramrod_data {
        struct pf_start_ramrod_data pf_start;
        struct pf_update_ramrod_data pf_update;
        struct rx_queue_start_ramrod_data rx_queue_start;
        struct rx_queue_update_ramrod_data rx_queue_update;
        struct rx_queue_stop_ramrod_data rx_queue_stop;
        struct tx_queue_start_ramrod_data tx_queue_start;
        struct tx_queue_stop_ramrod_data tx_queue_stop;
        struct vport_start_ramrod_data vport_start;
        struct vport_stop_ramrod_data vport_stop;
        struct vport_update_ramrod_data vport_update;
        struct core_rx_start_ramrod_data core_rx_queue_start;
        struct core_rx_stop_ramrod_data core_rx_queue_stop;
        struct core_tx_start_ramrod_data core_tx_queue_start;
        struct core_tx_stop_ramrod_data core_tx_queue_stop;
        struct vport_filter_update_ramrod_data vport_filter_update;

        struct rdma_init_func_ramrod_data rdma_init_func;
        struct rdma_close_func_ramrod_data rdma_close_func;
        struct rdma_register_tid_ramrod_data rdma_register_tid;
        struct rdma_deregister_tid_ramrod_data rdma_deregister_tid;
        struct roce_create_qp_resp_ramrod_data roce_create_qp_resp;
        struct roce_create_qp_req_ramrod_data roce_create_qp_req;
        struct roce_modify_qp_resp_ramrod_data roce_modify_qp_resp;
        struct roce_modify_qp_req_ramrod_data roce_modify_qp_req;
        struct roce_query_qp_resp_ramrod_data roce_query_qp_resp;
        struct roce_query_qp_req_ramrod_data roce_query_qp_req;
        struct roce_destroy_qp_resp_ramrod_data roce_destroy_qp_resp;
        struct roce_destroy_qp_req_ramrod_data roce_destroy_qp_req;
        struct rdma_create_cq_ramrod_data rdma_create_cq;
        struct rdma_destroy_cq_ramrod_data rdma_destroy_cq;
        struct rdma_srq_create_ramrod_data rdma_create_srq;
        struct rdma_srq_destroy_ramrod_data rdma_destroy_srq;
        struct rdma_srq_modify_ramrod_data rdma_modify_srq;
        struct roce_init_func_ramrod_data roce_init_func;

        struct iscsi_slow_path_hdr iscsi_empty;
        struct iscsi_init_ramrod_params iscsi_init;
        struct iscsi_spe_func_dstry iscsi_destroy;
        struct iscsi_spe_conn_offload iscsi_conn_offload;
        struct iscsi_conn_update_ramrod_params iscsi_conn_update;
        struct iscsi_spe_conn_termination iscsi_conn_terminate;

        struct vf_start_ramrod_data vf_start;
        struct vf_stop_ramrod_data vf_stop;
};

#define EQ_MAX_CREDIT   0xffffffff

enum spq_priority {
        QED_SPQ_PRIORITY_NORMAL,
        QED_SPQ_PRIORITY_HIGH,
};

union qed_spq_req_comp {
        struct qed_spq_comp_cb  cb;
        u64                     *done_addr;
};

struct qed_spq_comp_done {
        u64     done;
        u8      fw_return_code;
};

struct qed_spq_entry {
        struct list_head                list;

        u8                              flags;

        /* HSI slow path element */
        struct slow_path_element        elem;

        union ramrod_data               ramrod;

        enum spq_priority               priority;

        /* pending queue for this entry */
        struct list_head                *queue;

        enum spq_mode                   comp_mode;
        struct qed_spq_comp_cb          comp_cb;
        struct qed_spq_comp_done        comp_done; /* SPQ_MODE_EBLOCK */
};

struct qed_eq {
        struct qed_chain        chain;
        u8                      eq_sb_index;    /* index within the SB */
        __le16                  *p_fw_cons;     /* ptr to index value */
};

struct qed_consq {
        struct qed_chain chain;
};

struct qed_spq {
        spinlock_t              lock; /* SPQ lock */

        struct list_head        unlimited_pending;
        struct list_head        pending;
        struct list_head        completion_pending;
        struct list_head        free_pool;

        struct qed_chain        chain;

        /* allocated dma-able memory for spq entries (+ramrod data) */
        dma_addr_t              p_phys;
        struct qed_spq_entry    *p_virt;

#define SPQ_RING_SIZE \
        (CORE_SPQE_PAGE_SIZE_BYTES / sizeof(struct slow_path_element))

        /* Bitmap for handling out-of-order completions */
        DECLARE_BITMAP(p_comp_bitmap, SPQ_RING_SIZE);
        u8                      comp_bitmap_idx;

        /* Statistics */
        u32                     unlimited_pending_count;
        u32                     normal_count;
        u32                     high_count;
        u32                     comp_sent_count;
        u32                     comp_count;

        u32                     cid;
};

/**
 * @brief qed_spq_post - Posts a Slow hwfn request to FW, or lacking that
 *        Pends it to the future list.
 *
 * @param p_hwfn
 * @param p_req
 *
 * @return int
 */
int qed_spq_post(struct qed_hwfn *p_hwfn,
                 struct qed_spq_entry *p_ent,
                 u8 *fw_return_code);

/**
 * @brief qed_spq_allocate - Alloocates & initializes the SPQ and EQ.
 *
 * @param p_hwfn
 *
 * @return int
 */
int qed_spq_alloc(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_spq_setup - Reset the SPQ to its start state.
 *
 * @param p_hwfn
 */
void qed_spq_setup(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_spq_deallocate - Deallocates the given SPQ struct.
 *
 * @param p_hwfn
 */
void qed_spq_free(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_spq_get_entry - Obtain an entrry from the spq
 *        free pool list.
 *
 *
 *
 * @param p_hwfn
 * @param pp_ent
 *
 * @return int
 */
int
qed_spq_get_entry(struct qed_hwfn *p_hwfn,
                  struct qed_spq_entry **pp_ent);

/**
 * @brief qed_spq_return_entry - Return an entry to spq free
 *                                 pool list
 *
 * @param p_hwfn
 * @param p_ent
 */
void qed_spq_return_entry(struct qed_hwfn *p_hwfn,
                          struct qed_spq_entry *p_ent);
/**
 * @brief qed_eq_allocate - Allocates & initializes an EQ struct
 *
 * @param p_hwfn
 * @param num_elem number of elements in the eq
 *
 * @return struct qed_eq* - a newly allocated structure; NULL upon error.
 */
struct qed_eq *qed_eq_alloc(struct qed_hwfn *p_hwfn,
                            u16 num_elem);

/**
 * @brief qed_eq_setup - Reset the SPQ to its start state.
 *
 * @param p_hwfn
 * @param p_eq
 */
void qed_eq_setup(struct qed_hwfn *p_hwfn,
                  struct qed_eq *p_eq);

/**
 * @brief qed_eq_deallocate - deallocates the given EQ struct.
 *
 * @param p_hwfn
 * @param p_eq
 */
void qed_eq_free(struct qed_hwfn *p_hwfn,
                 struct qed_eq *p_eq);

/**
 * @brief qed_eq_prod_update - update the FW with default EQ producer
 *
 * @param p_hwfn
 * @param prod
 */
void qed_eq_prod_update(struct qed_hwfn *p_hwfn,
                        u16 prod);

/**
 * @brief qed_eq_completion - Completes currently pending EQ elements
 *
 * @param p_hwfn
 * @param cookie
 *
 * @return int
 */
int qed_eq_completion(struct qed_hwfn *p_hwfn,
                      void *cookie);

/**
 * @brief qed_spq_completion - Completes a single event
 *
 * @param p_hwfn
 * @param echo - echo value from cookie (used for determining completion)
 * @param p_data - data from cookie (used in callback function if applicable)
 *
 * @return int
 */
int qed_spq_completion(struct qed_hwfn *p_hwfn,
                       __le16 echo,
                       u8 fw_return_code,
                       union event_ring_data *p_data);

/**
 * @brief qed_spq_get_cid - Given p_hwfn, return cid for the hwfn's SPQ
 *
 * @param p_hwfn
 *
 * @return u32 - SPQ CID
 */
u32 qed_spq_get_cid(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_consq_alloc - Allocates & initializes an ConsQ
 *        struct
 *
 * @param p_hwfn
 *
 * @return struct qed_eq* - a newly allocated structure; NULL upon error.
 */
struct qed_consq *qed_consq_alloc(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_consq_setup - Reset the ConsQ to its start
 *        state.
 *
 * @param p_hwfn
 * @param p_eq
 */
void qed_consq_setup(struct qed_hwfn *p_hwfn,
                     struct qed_consq *p_consq);

/**
 * @brief qed_consq_free - deallocates the given ConsQ struct.
 *
 * @param p_hwfn
 * @param p_eq
 */
void qed_consq_free(struct qed_hwfn *p_hwfn,
                    struct qed_consq *p_consq);

/**
 * @file
 *
 * @brief Slow-hwfn low-level commands (Ramrods) function definitions.
 */

#define QED_SP_EQ_COMPLETION  0x01
#define QED_SP_CQE_COMPLETION 0x02

struct qed_sp_init_data {
        u32                     cid;
        u16                     opaque_fid;

        /* Information regarding operation upon sending & completion */
        enum spq_mode           comp_mode;
        struct qed_spq_comp_cb *p_comp_data;
};

int qed_sp_init_request(struct qed_hwfn *p_hwfn,
                        struct qed_spq_entry **pp_ent,
                        u8 cmd,
                        u8 protocol,
                        struct qed_sp_init_data *p_data);

/**
 * @brief qed_sp_pf_start - PF Function Start Ramrod
 *
 * This ramrod is sent to initialize a physical function (PF). It will
 * configure the function related parameters and write its completion to the
 * event ring specified in the parameters.
 *
 * Ramrods complete on the common event ring for the PF. This ring is
 * allocated by the driver on host memory and its parameters are written
 * to the internal RAM of the UStorm by the Function Start Ramrod.
 *
 * @param p_hwfn
 * @param p_tunn
 * @param mode
 * @param allow_npar_tx_switch
 *
 * @return int
 */

int qed_sp_pf_start(struct qed_hwfn *p_hwfn,
                    struct qed_tunn_start_params *p_tunn,
                    enum qed_mf_mode mode, bool allow_npar_tx_switch);

/**
 * @brief qed_sp_pf_update - PF Function Update Ramrod
 *
 * This ramrod updates function-related parameters. Every parameter can be
 * updated independently, according to configuration flags.
 *
 * @param p_hwfn
 *
 * @return int
 */

int qed_sp_pf_update(struct qed_hwfn *p_hwfn);

/**
 * @brief qed_sp_pf_stop - PF Function Stop Ramrod
 *
 * This ramrod is sent to close a Physical Function (PF). It is the last ramrod
 * sent and the last completion written to the PFs Event Ring. This ramrod also
 * deletes the context for the Slowhwfn connection on this PF.
 *
 * @note Not required for first packet.
 *
 * @param p_hwfn
 *
 * @return int
 */

int qed_sp_pf_stop(struct qed_hwfn *p_hwfn);

int qed_sp_pf_update_tunn_cfg(struct qed_hwfn *p_hwfn,
                              struct qed_tunn_update_params *p_tunn,
                              enum spq_mode comp_mode,
                              struct qed_spq_comp_cb *p_comp_data);
/**
 * @brief qed_sp_heartbeat_ramrod - Send empty Ramrod
 *
 * @param p_hwfn
 *
 * @return int
 */

int qed_sp_heartbeat_ramrod(struct qed_hwfn *p_hwfn);

#endif