/*
 * Copyright 2008 - 2015 Freescale Semiconductor Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Freescale Semiconductor nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") as published by the Free Software
 * Foundation, either version 2 of that License or (at your option) any
 * later version.
 *
 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/io.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/delay.h>
#include <linux/libfdt_env.h>

#include "fman.h"
#include "fman_port.h"
#include "fman_sp.h"
#include "fman_keygen.h"

/* Queue ID */
#define DFLT_FQ_ID              0x00FFFFFF

/* General defines */
#define PORT_BMI_FIFO_UNITS             0x100

#define MAX_PORT_FIFO_SIZE(bmi_max_fifo_size)   \
        min((u32)bmi_max_fifo_size, (u32)1024 * FMAN_BMI_FIFO_UNITS)

#define PORT_CG_MAP_NUM                 8
#define PORT_PRS_RESULT_WORDS_NUM       8
#define PORT_IC_OFFSET_UNITS            0x10

#define MIN_EXT_BUF_SIZE                64

#define BMI_PORT_REGS_OFFSET                            0
#define QMI_PORT_REGS_OFFSET                            0x400
#define HWP_PORT_REGS_OFFSET                            0x800

/* Default values */
#define DFLT_PORT_BUFFER_PREFIX_CONTEXT_DATA_ALIGN              \
        DFLT_FM_SP_BUFFER_PREFIX_CONTEXT_DATA_ALIGN

#define DFLT_PORT_CUT_BYTES_FROM_END            4

#define DFLT_PORT_ERRORS_TO_DISCARD             FM_PORT_FRM_ERR_CLS_DISCARD
#define DFLT_PORT_MAX_FRAME_LENGTH              9600

#define DFLT_PORT_RX_FIFO_PRI_ELEVATION_LEV(bmi_max_fifo_size)  \
        MAX_PORT_FIFO_SIZE(bmi_max_fifo_size)

#define DFLT_PORT_RX_FIFO_THRESHOLD(major, bmi_max_fifo_size)   \
        (major == 6 ?                                           \
        MAX_PORT_FIFO_SIZE(bmi_max_fifo_size) :         \
        (MAX_PORT_FIFO_SIZE(bmi_max_fifo_size) * 3 / 4))        \

#define DFLT_PORT_EXTRA_NUM_OF_FIFO_BUFS                0

/* QMI defines */
#define QMI_DEQ_CFG_SUBPORTAL_MASK              0x1f

#define QMI_PORT_CFG_EN                         0x80000000
#define QMI_PORT_STATUS_DEQ_FD_BSY              0x20000000

#define QMI_DEQ_CFG_PRI                         0x80000000
#define QMI_DEQ_CFG_TYPE1                       0x10000000
#define QMI_DEQ_CFG_TYPE2                       0x20000000
#define QMI_DEQ_CFG_TYPE3                       0x30000000
#define QMI_DEQ_CFG_PREFETCH_PARTIAL            0x01000000
#define QMI_DEQ_CFG_PREFETCH_FULL               0x03000000
#define QMI_DEQ_CFG_SP_MASK                     0xf
#define QMI_DEQ_CFG_SP_SHIFT                    20

#define QMI_BYTE_COUNT_LEVEL_CONTROL(_type)     \
        (_type == FMAN_PORT_TYPE_TX ? 0x1400 : 0x400)

/* BMI defins */
#define BMI_EBD_EN                              0x80000000

#define BMI_PORT_CFG_EN                         0x80000000

#define BMI_PORT_STATUS_BSY                     0x80000000

#define BMI_DMA_ATTR_SWP_SHIFT                  FMAN_SP_DMA_ATTR_SWP_SHIFT
#define BMI_DMA_ATTR_WRITE_OPTIMIZE             FMAN_SP_DMA_ATTR_WRITE_OPTIMIZE

#define BMI_RX_FIFO_PRI_ELEVATION_SHIFT 16
#define BMI_RX_FIFO_THRESHOLD_ETHE              0x80000000

#define BMI_FRAME_END_CS_IGNORE_SHIFT           24
#define BMI_FRAME_END_CS_IGNORE_MASK            0x0000001f

#define BMI_RX_FRAME_END_CUT_SHIFT              16
#define BMI_RX_FRAME_END_CUT_MASK               0x0000001f

#define BMI_IC_TO_EXT_SHIFT                     FMAN_SP_IC_TO_EXT_SHIFT
#define BMI_IC_TO_EXT_MASK                      0x0000001f
#define BMI_IC_FROM_INT_SHIFT                   FMAN_SP_IC_FROM_INT_SHIFT
#define BMI_IC_FROM_INT_MASK                    0x0000000f
#define BMI_IC_SIZE_MASK                        0x0000001f

#define BMI_INT_BUF_MARG_SHIFT                  28
#define BMI_INT_BUF_MARG_MASK                   0x0000000f
#define BMI_EXT_BUF_MARG_START_SHIFT            FMAN_SP_EXT_BUF_MARG_START_SHIFT
#define BMI_EXT_BUF_MARG_START_MASK             0x000001ff
#define BMI_EXT_BUF_MARG_END_MASK               0x000001ff

#define BMI_CMD_MR_LEAC                         0x00200000
#define BMI_CMD_MR_SLEAC                        0x00100000
#define BMI_CMD_MR_MA                           0x00080000
#define BMI_CMD_MR_DEAS                         0x00040000
#define BMI_CMD_RX_MR_DEF                       (BMI_CMD_MR_LEAC | \
                                                BMI_CMD_MR_SLEAC | \
                                                BMI_CMD_MR_MA | \
                                                BMI_CMD_MR_DEAS)
#define BMI_CMD_TX_MR_DEF                       0

#define BMI_CMD_ATTR_ORDER                      0x80000000
#define BMI_CMD_ATTR_SYNC                       0x02000000
#define BMI_CMD_ATTR_COLOR_SHIFT                26

#define BMI_FIFO_PIPELINE_DEPTH_SHIFT           12
#define BMI_FIFO_PIPELINE_DEPTH_MASK            0x0000000f
#define BMI_NEXT_ENG_FD_BITS_SHIFT              24

#define BMI_EXT_BUF_POOL_VALID                  FMAN_SP_EXT_BUF_POOL_VALID
#define BMI_EXT_BUF_POOL_EN_COUNTER             FMAN_SP_EXT_BUF_POOL_EN_COUNTER
#define BMI_EXT_BUF_POOL_BACKUP         FMAN_SP_EXT_BUF_POOL_BACKUP
#define BMI_EXT_BUF_POOL_ID_SHIFT               16
#define BMI_EXT_BUF_POOL_ID_MASK                0x003F0000
#define BMI_POOL_DEP_NUM_OF_POOLS_SHIFT 16

#define BMI_TX_FIFO_MIN_FILL_SHIFT              16

#define BMI_PRIORITY_ELEVATION_LEVEL ((0x3FF + 1) * PORT_BMI_FIFO_UNITS)
#define BMI_FIFO_THRESHOLD            ((0x3FF + 1) * PORT_BMI_FIFO_UNITS)

#define BMI_DEQUEUE_PIPELINE_DEPTH(_type, _speed)               \
        ((_type == FMAN_PORT_TYPE_TX && _speed == 10000) ? 4 : 1)

#define RX_ERRS_TO_ENQ                            \
        (FM_PORT_FRM_ERR_DMA                    | \
        FM_PORT_FRM_ERR_PHYSICAL                | \
        FM_PORT_FRM_ERR_SIZE                    | \
        FM_PORT_FRM_ERR_EXTRACTION              | \
        FM_PORT_FRM_ERR_NO_SCHEME               | \
        FM_PORT_FRM_ERR_PRS_TIMEOUT             | \
        FM_PORT_FRM_ERR_PRS_ILL_INSTRUCT        | \
        FM_PORT_FRM_ERR_BLOCK_LIMIT_EXCEEDED    | \
        FM_PORT_FRM_ERR_PRS_HDR_ERR             | \
        FM_PORT_FRM_ERR_KEYSIZE_OVERFLOW        | \
        FM_PORT_FRM_ERR_IPRE)

/* NIA defines */
#define NIA_ORDER_RESTOR                                0x00800000
#define NIA_ENG_BMI                                     0x00500000
#define NIA_ENG_QMI_ENQ                                 0x00540000
#define NIA_ENG_QMI_DEQ                                 0x00580000
#define NIA_ENG_HWP                                     0x00440000
#define NIA_ENG_HWK                                     0x00480000
#define NIA_BMI_AC_ENQ_FRAME                            0x00000002
#define NIA_BMI_AC_TX_RELEASE                           0x000002C0
#define NIA_BMI_AC_RELEASE                              0x000000C0
#define NIA_BMI_AC_TX                                   0x00000274
#define NIA_BMI_AC_FETCH_ALL_FRAME                      0x0000020c

/* Port IDs */
#define TX_10G_PORT_BASE                0x30
#define RX_10G_PORT_BASE                0x10

/* BMI Rx port register map */
struct fman_port_rx_bmi_regs {
        u32 fmbm_rcfg;          /* Rx Configuration */
        u32 fmbm_rst;           /* Rx Status */
        u32 fmbm_rda;           /* Rx DMA attributes */
        u32 fmbm_rfp;           /* Rx FIFO Parameters */
        u32 fmbm_rfed;          /* Rx Frame End Data */
        u32 fmbm_ricp;          /* Rx Internal Context Parameters */
        u32 fmbm_rim;           /* Rx Internal Buffer Margins */
        u32 fmbm_rebm;          /* Rx External Buffer Margins */
        u32 fmbm_rfne;          /* Rx Frame Next Engine */
        u32 fmbm_rfca;          /* Rx Frame Command Attributes. */
        u32 fmbm_rfpne;         /* Rx Frame Parser Next Engine */
        u32 fmbm_rpso;          /* Rx Parse Start Offset */
        u32 fmbm_rpp;           /* Rx Policer Profile  */
        u32 fmbm_rccb;          /* Rx Coarse Classification Base */
        u32 fmbm_reth;          /* Rx Excessive Threshold */
        u32 reserved003c[1];    /* (0x03C 0x03F) */
        u32 fmbm_rprai[PORT_PRS_RESULT_WORDS_NUM];
        /* Rx Parse Results Array Init */
        u32 fmbm_rfqid;         /* Rx Frame Queue ID */
        u32 fmbm_refqid;        /* Rx Error Frame Queue ID */
        u32 fmbm_rfsdm;         /* Rx Frame Status Discard Mask */
        u32 fmbm_rfsem;         /* Rx Frame Status Error Mask */
        u32 fmbm_rfene;         /* Rx Frame Enqueue Next Engine */
        u32 reserved0074[0x2];  /* (0x074-0x07C)  */
        u32 fmbm_rcmne;         /* Rx Frame Continuous Mode Next Engine */
        u32 reserved0080[0x20]; /* (0x080 0x0FF)  */
        u32 fmbm_ebmpi[FMAN_PORT_MAX_EXT_POOLS_NUM];
        /* Buffer Manager pool Information- */
        u32 fmbm_acnt[FMAN_PORT_MAX_EXT_POOLS_NUM];     /* Allocate Counter- */
        u32 reserved0130[8];    /* 0x130/0x140 - 0x15F reserved - */
        u32 fmbm_rcgm[PORT_CG_MAP_NUM]; /* Congestion Group Map */
        u32 fmbm_mpd;           /* BM Pool Depletion  */
        u32 reserved0184[0x1F]; /* (0x184 0x1FF) */
        u32 fmbm_rstc;          /* Rx Statistics Counters */
        u32 fmbm_rfrc;          /* Rx Frame Counter */
        u32 fmbm_rfbc;          /* Rx Bad Frames Counter */
        u32 fmbm_rlfc;          /* Rx Large Frames Counter */
        u32 fmbm_rffc;          /* Rx Filter Frames Counter */
        u32 fmbm_rfdc;          /* Rx Frame Discard Counter */
        u32 fmbm_rfldec;                /* Rx Frames List DMA Error Counter */
        u32 fmbm_rodc;          /* Rx Out of Buffers Discard nntr */
        u32 fmbm_rbdc;          /* Rx Buffers Deallocate Counter */
        u32 fmbm_rpec;          /* RX Prepare to enqueue Counte */
        u32 reserved0224[0x16]; /* (0x224 0x27F) */
        u32 fmbm_rpc;           /* Rx Performance Counters */
        u32 fmbm_rpcp;          /* Rx Performance Count Parameters */
        u32 fmbm_rccn;          /* Rx Cycle Counter */
        u32 fmbm_rtuc;          /* Rx Tasks Utilization Counter */
        u32 fmbm_rrquc;         /* Rx Receive Queue Utilization cntr */
        u32 fmbm_rduc;          /* Rx DMA Utilization Counter */
        u32 fmbm_rfuc;          /* Rx FIFO Utilization Counter */
        u32 fmbm_rpac;          /* Rx Pause Activation Counter */
        u32 reserved02a0[0x18]; /* (0x2A0 0x2FF) */
        u32 fmbm_rdcfg[0x3];    /* Rx Debug Configuration */
        u32 fmbm_rgpr;          /* Rx General Purpose Register */
        u32 reserved0310[0x3a];
};

/* BMI Tx port register map */
struct fman_port_tx_bmi_regs {
        u32 fmbm_tcfg;          /* Tx Configuration */
        u32 fmbm_tst;           /* Tx Status */
        u32 fmbm_tda;           /* Tx DMA attributes */
        u32 fmbm_tfp;           /* Tx FIFO Parameters */
        u32 fmbm_tfed;          /* Tx Frame End Data */
        u32 fmbm_ticp;          /* Tx Internal Context Parameters */
        u32 fmbm_tfdne;         /* Tx Frame Dequeue Next Engine. */
        u32 fmbm_tfca;          /* Tx Frame Command attribute. */
        u32 fmbm_tcfqid;        /* Tx Confirmation Frame Queue ID. */
        u32 fmbm_tefqid;        /* Tx Frame Error Queue ID */
        u32 fmbm_tfene;         /* Tx Frame Enqueue Next Engine */
        u32 fmbm_trlmts;        /* Tx Rate Limiter Scale */
        u32 fmbm_trlmt;         /* Tx Rate Limiter */
        u32 reserved0034[0x0e]; /* (0x034-0x6c) */
        u32 fmbm_tccb;          /* Tx Coarse Classification base */
        u32 fmbm_tfne;          /* Tx Frame Next Engine */
        u32 fmbm_tpfcm[0x02];
        /* Tx Priority based Flow Control (PFC) Mapping */
        u32 fmbm_tcmne;         /* Tx Frame Continuous Mode Next Engine */
        u32 reserved0080[0x60]; /* (0x080-0x200) */
        u32 fmbm_tstc;          /* Tx Statistics Counters */
        u32 fmbm_tfrc;          /* Tx Frame Counter */
        u32 fmbm_tfdc;          /* Tx Frames Discard Counter */
        u32 fmbm_tfledc;        /* Tx Frame len error discard cntr */
        u32 fmbm_tfufdc;        /* Tx Frame unsprt frmt discard cntr */
        u32 fmbm_tbdc;          /* Tx Buffers Deallocate Counter */
        u32 reserved0218[0x1A]; /* (0x218-0x280) */
        u32 fmbm_tpc;           /* Tx Performance Counters */
        u32 fmbm_tpcp;          /* Tx Performance Count Parameters */
        u32 fmbm_tccn;          /* Tx Cycle Counter */
        u32 fmbm_ttuc;          /* Tx Tasks Utilization Counter */
        u32 fmbm_ttcquc;        /* Tx Transmit conf Q util Counter */
        u32 fmbm_tduc;          /* Tx DMA Utilization Counter */
        u32 fmbm_tfuc;          /* Tx FIFO Utilization Counter */
        u32 reserved029c[16];   /* (0x29C-0x2FF) */
        u32 fmbm_tdcfg[0x3];    /* Tx Debug Configuration */
        u32 fmbm_tgpr;          /* Tx General Purpose Register */
        u32 reserved0310[0x3a]; /* (0x310-0x3FF) */
};

/* BMI port register map */
union fman_port_bmi_regs {
        struct fman_port_rx_bmi_regs rx;
        struct fman_port_tx_bmi_regs tx;
};

/* QMI port register map */
struct fman_port_qmi_regs {
        u32 fmqm_pnc;           /* PortID n Configuration Register */
        u32 fmqm_pns;           /* PortID n Status Register */
        u32 fmqm_pnts;          /* PortID n Task Status Register */
        u32 reserved00c[4];     /* 0xn00C - 0xn01B */
        u32 fmqm_pnen;          /* PortID n Enqueue NIA Register */
        u32 fmqm_pnetfc;                /* PortID n Enq Total Frame Counter */
        u32 reserved024[2];     /* 0xn024 - 0x02B */
        u32 fmqm_pndn;          /* PortID n Dequeue NIA Register */
        u32 fmqm_pndc;          /* PortID n Dequeue Config Register */
        u32 fmqm_pndtfc;                /* PortID n Dequeue tot Frame cntr */
        u32 fmqm_pndfdc;                /* PortID n Dequeue FQID Dflt Cntr */
        u32 fmqm_pndcc;         /* PortID n Dequeue Confirm Counter */
};

#define HWP_HXS_COUNT 16
#define HWP_HXS_PHE_REPORT 0x00000800
#define HWP_HXS_PCAC_PSTAT 0x00000100
#define HWP_HXS_PCAC_PSTOP 0x00000001
#define HWP_HXS_TCP_OFFSET 0xA
#define HWP_HXS_UDP_OFFSET 0xB
#define HWP_HXS_SH_PAD_REM 0x80000000

struct fman_port_hwp_regs {
        struct {
                u32 ssa; /* Soft Sequence Attachment */
                u32 lcv; /* Line-up Enable Confirmation Mask */
        } pmda[HWP_HXS_COUNT]; /* Parse Memory Direct Access Registers */
        u32 reserved080[(0x3f8 - 0x080) / 4]; /* (0x080-0x3f7) */
        u32 fmpr_pcac; /* Configuration Access Control */
};

/* QMI dequeue prefetch modes */
enum fman_port_deq_prefetch {
        FMAN_PORT_DEQ_NO_PREFETCH, /* No prefetch mode */
        FMAN_PORT_DEQ_PART_PREFETCH, /* Partial prefetch mode */
        FMAN_PORT_DEQ_FULL_PREFETCH /* Full prefetch mode */
};

/* A structure for defining FM port resources */
struct fman_port_rsrc {
        u32 num; /* Committed required resource */
        u32 extra; /* Extra (not committed) required resource */
};

enum fman_port_dma_swap {
        FMAN_PORT_DMA_NO_SWAP,  /* No swap, transfer data as is */
        FMAN_PORT_DMA_SWAP_LE,
        /* The transferred data should be swapped in PPC Little Endian mode */
        FMAN_PORT_DMA_SWAP_BE
        /* The transferred data should be swapped in Big Endian mode */
};

/* Default port color */
enum fman_port_color {
        FMAN_PORT_COLOR_GREEN,  /* Default port color is green */
        FMAN_PORT_COLOR_YELLOW, /* Default port color is yellow */
        FMAN_PORT_COLOR_RED,            /* Default port color is red */
        FMAN_PORT_COLOR_OVERRIDE        /* Ignore color */
};

/* QMI dequeue from the SP channel - types */
enum fman_port_deq_type {
        FMAN_PORT_DEQ_BY_PRI,
        /* Priority precedence and Intra-Class scheduling */
        FMAN_PORT_DEQ_ACTIVE_FQ,
        /* Active FQ precedence and Intra-Class scheduling */
        FMAN_PORT_DEQ_ACTIVE_FQ_NO_ICS
        /* Active FQ precedence and override Intra-Class scheduling */
};

/* External buffer pools configuration */
struct fman_port_bpools {
        u8 count;                       /* Num of pools to set up */
        bool counters_enable;           /* Enable allocate counters */
        u8 grp_bp_depleted_num;
        /* Number of depleted pools - if reached the BMI indicates
         * the MAC to send a pause frame
         */
        struct {
                u8 bpid;                /* BM pool ID */
                u16 size;
                /* Pool's size - must be in ascending order */
                bool is_backup;
                /* If this is a backup pool */
                bool grp_bp_depleted;
                /* Consider this buffer in multiple pools depletion criteria */
                bool single_bp_depleted;
                /* Consider this buffer in single pool depletion criteria */
        } bpool[FMAN_PORT_MAX_EXT_POOLS_NUM];
};

struct fman_port_cfg {
        u32 dflt_fqid;
        u32 err_fqid;
        u32 pcd_base_fqid;
        u32 pcd_fqs_count;
        u8 deq_sp;
        bool deq_high_priority;
        enum fman_port_deq_type deq_type;
        enum fman_port_deq_prefetch deq_prefetch_option;
        u16 deq_byte_cnt;
        u8 cheksum_last_bytes_ignore;
        u8 rx_cut_end_bytes;
        struct fman_buf_pool_depletion buf_pool_depletion;
        struct fman_ext_pools ext_buf_pools;
        u32 tx_fifo_min_level;
        u32 tx_fifo_low_comf_level;
        u32 rx_pri_elevation;
        u32 rx_fifo_thr;
        struct fman_sp_buf_margins buf_margins;
        u32 int_buf_start_margin;
        struct fman_sp_int_context_data_copy int_context;
        u32 discard_mask;
        u32 err_mask;
        struct fman_buffer_prefix_content buffer_prefix_content;
        bool dont_release_buf;

        u8 rx_fd_bits;
        u32 tx_fifo_deq_pipeline_depth;
        bool errata_A006320;
        bool excessive_threshold_register;
        bool fmbm_tfne_has_features;

        enum fman_port_dma_swap dma_swap_data;
        enum fman_port_color color;
};

struct fman_port_rx_pools_params {
        u8 num_of_pools;
        u16 largest_buf_size;
};

struct fman_port_dts_params {
        void __iomem *base_addr;        /* FMan port virtual memory */
        enum fman_port_type type;       /* Port type */
        u16 speed;                      /* Port speed */
        u8 id;                          /* HW Port Id */
        u32 qman_channel_id;            /* QMan channel id (non RX only) */
        struct fman *fman;              /* FMan Handle */
};

struct fman_port {
        void *fm;
        struct device *dev;
        struct fman_rev_info rev_info;
        u8 port_id;
        enum fman_port_type port_type;
        u16 port_speed;

        union fman_port_bmi_regs __iomem *bmi_regs;
        struct fman_port_qmi_regs __iomem *qmi_regs;
        struct fman_port_hwp_regs __iomem *hwp_regs;

        struct fman_sp_buffer_offsets buffer_offsets;

        u8 internal_buf_offset;
        struct fman_ext_pools ext_buf_pools;

        u16 max_frame_length;
        struct fman_port_rsrc open_dmas;
        struct fman_port_rsrc tasks;
        struct fman_port_rsrc fifo_bufs;
        struct fman_port_rx_pools_params rx_pools_params;

        struct fman_port_cfg *cfg;
        struct fman_port_dts_params dts_params;

        u8 ext_pools_num;
        u32 max_port_fifo_size;
        u32 max_num_of_ext_pools;
        u32 max_num_of_sub_portals;
        u32 bm_max_num_of_pools;
};

static int init_bmi_rx(struct fman_port *port)
{
        struct fman_port_rx_bmi_regs __iomem *regs = &port->bmi_regs->rx;
        struct fman_port_cfg *cfg = port->cfg;
        u32 tmp;

        /* DMA attributes */
        tmp = (u32)cfg->dma_swap_data << BMI_DMA_ATTR_SWP_SHIFT;
        /* Enable write optimization */
        tmp |= BMI_DMA_ATTR_WRITE_OPTIMIZE;
        iowrite32be(tmp, &regs->fmbm_rda);

        /* Rx FIFO parameters */
        tmp = (cfg->rx_pri_elevation / PORT_BMI_FIFO_UNITS - 1) <<
                BMI_RX_FIFO_PRI_ELEVATION_SHIFT;
        tmp |= cfg->rx_fifo_thr / PORT_BMI_FIFO_UNITS - 1;
        iowrite32be(tmp, &regs->fmbm_rfp);

        if (cfg->excessive_threshold_register)
                /* always allow access to the extra resources */
                iowrite32be(BMI_RX_FIFO_THRESHOLD_ETHE, &regs->fmbm_reth);

        /* Frame end data */
        tmp = (cfg->cheksum_last_bytes_ignore & BMI_FRAME_END_CS_IGNORE_MASK) <<
                BMI_FRAME_END_CS_IGNORE_SHIFT;
        tmp |= (cfg->rx_cut_end_bytes & BMI_RX_FRAME_END_CUT_MASK) <<
                BMI_RX_FRAME_END_CUT_SHIFT;
        if (cfg->errata_A006320)
                tmp &= 0xffe0ffff;
        iowrite32be(tmp, &regs->fmbm_rfed);

        /* Internal context parameters */
        tmp = ((cfg->int_context.ext_buf_offset / PORT_IC_OFFSET_UNITS) &
                BMI_IC_TO_EXT_MASK) << BMI_IC_TO_EXT_SHIFT;
        tmp |= ((cfg->int_context.int_context_offset / PORT_IC_OFFSET_UNITS) &
                BMI_IC_FROM_INT_MASK) << BMI_IC_FROM_INT_SHIFT;
        tmp |= (cfg->int_context.size / PORT_IC_OFFSET_UNITS) &
                BMI_IC_SIZE_MASK;
        iowrite32be(tmp, &regs->fmbm_ricp);

        /* Internal buffer offset */
        tmp = ((cfg->int_buf_start_margin / PORT_IC_OFFSET_UNITS) &
                BMI_INT_BUF_MARG_MASK) << BMI_INT_BUF_MARG_SHIFT;
        iowrite32be(tmp, &regs->fmbm_rim);

        /* External buffer margins */
        tmp = (cfg->buf_margins.start_margins & BMI_EXT_BUF_MARG_START_MASK) <<
                BMI_EXT_BUF_MARG_START_SHIFT;
        tmp |= cfg->buf_margins.end_margins & BMI_EXT_BUF_MARG_END_MASK;
        iowrite32be(tmp, &regs->fmbm_rebm);

        /* Frame attributes */
        tmp = BMI_CMD_RX_MR_DEF;
        tmp |= BMI_CMD_ATTR_ORDER;
        tmp |= (u32)cfg->color << BMI_CMD_ATTR_COLOR_SHIFT;
        /* Synchronization request */
        tmp |= BMI_CMD_ATTR_SYNC;

        iowrite32be(tmp, &regs->fmbm_rfca);

        /* NIA */
        tmp = (u32)cfg->rx_fd_bits << BMI_NEXT_ENG_FD_BITS_SHIFT;

        tmp |= NIA_ENG_HWP;
        iowrite32be(tmp, &regs->fmbm_rfne);

        /* Parser Next Engine NIA */
        iowrite32be(NIA_ENG_BMI | NIA_BMI_AC_ENQ_FRAME, &regs->fmbm_rfpne);

        /* Enqueue NIA */
        iowrite32be(NIA_ENG_QMI_ENQ | NIA_ORDER_RESTOR, &regs->fmbm_rfene);

        /* Default/error queues */
        iowrite32be((cfg->dflt_fqid & DFLT_FQ_ID), &regs->fmbm_rfqid);
        iowrite32be((cfg->err_fqid & DFLT_FQ_ID), &regs->fmbm_refqid);

        /* Discard/error masks */
        iowrite32be(cfg->discard_mask, &regs->fmbm_rfsdm);
        iowrite32be(cfg->err_mask, &regs->fmbm_rfsem);

        return 0;
}

static int init_bmi_tx(struct fman_port *port)
{
        struct fman_port_tx_bmi_regs __iomem *regs = &port->bmi_regs->tx;
        struct fman_port_cfg *cfg = port->cfg;
        u32 tmp;

        /* Tx Configuration register */
        tmp = 0;
        iowrite32be(tmp, &regs->fmbm_tcfg);

        /* DMA attributes */
        tmp = (u32)cfg->dma_swap_data << BMI_DMA_ATTR_SWP_SHIFT;
        iowrite32be(tmp, &regs->fmbm_tda);

        /* Tx FIFO parameters */
        tmp = (cfg->tx_fifo_min_level / PORT_BMI_FIFO_UNITS) <<
                BMI_TX_FIFO_MIN_FILL_SHIFT;
        tmp |= ((cfg->tx_fifo_deq_pipeline_depth - 1) &
                BMI_FIFO_PIPELINE_DEPTH_MASK) << BMI_FIFO_PIPELINE_DEPTH_SHIFT;
        tmp |= (cfg->tx_fifo_low_comf_level / PORT_BMI_FIFO_UNITS) - 1;
        iowrite32be(tmp, &regs->fmbm_tfp);

        /* Frame end data */
        tmp = (cfg->cheksum_last_bytes_ignore & BMI_FRAME_END_CS_IGNORE_MASK) <<
                BMI_FRAME_END_CS_IGNORE_SHIFT;
        iowrite32be(tmp, &regs->fmbm_tfed);

        /* Internal context parameters */
        tmp = ((cfg->int_context.ext_buf_offset / PORT_IC_OFFSET_UNITS) &
                BMI_IC_TO_EXT_MASK) << BMI_IC_TO_EXT_SHIFT;
        tmp |= ((cfg->int_context.int_context_offset / PORT_IC_OFFSET_UNITS) &
                BMI_IC_FROM_INT_MASK) << BMI_IC_FROM_INT_SHIFT;
        tmp |= (cfg->int_context.size / PORT_IC_OFFSET_UNITS) &
                BMI_IC_SIZE_MASK;
        iowrite32be(tmp, &regs->fmbm_ticp);

        /* Frame attributes */
        tmp = BMI_CMD_TX_MR_DEF;
        tmp |= BMI_CMD_ATTR_ORDER;
        tmp |= (u32)cfg->color << BMI_CMD_ATTR_COLOR_SHIFT;
        iowrite32be(tmp, &regs->fmbm_tfca);

        /* Dequeue NIA + enqueue NIA */
        iowrite32be(NIA_ENG_QMI_DEQ, &regs->fmbm_tfdne);
        iowrite32be(NIA_ENG_QMI_ENQ | NIA_ORDER_RESTOR, &regs->fmbm_tfene);
        if (cfg->fmbm_tfne_has_features)
                iowrite32be(!cfg->dflt_fqid ?
                            BMI_EBD_EN | NIA_BMI_AC_FETCH_ALL_FRAME :
                            NIA_BMI_AC_FETCH_ALL_FRAME, &regs->fmbm_tfne);
        if (!cfg->dflt_fqid && cfg->dont_release_buf) {
                iowrite32be(DFLT_FQ_ID, &regs->fmbm_tcfqid);
                iowrite32be(NIA_ENG_BMI | NIA_BMI_AC_TX_RELEASE,
                            &regs->fmbm_tfene);
                if (cfg->fmbm_tfne_has_features)
                        iowrite32be(ioread32be(&regs->fmbm_tfne) & ~BMI_EBD_EN,
                                    &regs->fmbm_tfne);
        }

        /* Confirmation/error queues */
        if (cfg->dflt_fqid || !cfg->dont_release_buf)
                iowrite32be(cfg->dflt_fqid & DFLT_FQ_ID, &regs->fmbm_tcfqid);
        iowrite32be((cfg->err_fqid & DFLT_FQ_ID), &regs->fmbm_tefqid);

        return 0;
}

static int init_qmi(struct fman_port *port)
{
        struct fman_port_qmi_regs __iomem *regs = port->qmi_regs;
        struct fman_port_cfg *cfg = port->cfg;
        u32 tmp;

        /* Rx port configuration */
        if (port->port_type == FMAN_PORT_TYPE_RX) {
                /* Enqueue NIA */
                iowrite32be(NIA_ENG_BMI | NIA_BMI_AC_RELEASE, &regs->fmqm_pnen);
                return 0;
        }

        /* Continue with Tx port configuration */
        if (port->port_type == FMAN_PORT_TYPE_TX) {
                /* Enqueue NIA */
                iowrite32be(NIA_ENG_BMI | NIA_BMI_AC_TX_RELEASE,
                            &regs->fmqm_pnen);
                /* Dequeue NIA */
                iowrite32be(NIA_ENG_BMI | NIA_BMI_AC_TX, &regs->fmqm_pndn);
        }

        /* Dequeue Configuration register */
        tmp = 0;
        if (cfg->deq_high_priority)
                tmp |= QMI_DEQ_CFG_PRI;

        switch (cfg->deq_type) {
        case FMAN_PORT_DEQ_BY_PRI:
                tmp |= QMI_DEQ_CFG_TYPE1;
                break;
        case FMAN_PORT_DEQ_ACTIVE_FQ:
                tmp |= QMI_DEQ_CFG_TYPE2;
                break;
        case FMAN_PORT_DEQ_ACTIVE_FQ_NO_ICS:
                tmp |= QMI_DEQ_CFG_TYPE3;
                break;
        default:
                return -EINVAL;
        }

        switch (cfg->deq_prefetch_option) {
        case FMAN_PORT_DEQ_NO_PREFETCH:
                break;
        case FMAN_PORT_DEQ_PART_PREFETCH:
                tmp |= QMI_DEQ_CFG_PREFETCH_PARTIAL;
                break;
        case FMAN_PORT_DEQ_FULL_PREFETCH:
                tmp |= QMI_DEQ_CFG_PREFETCH_FULL;
                break;
        default:
                return -EINVAL;
        }

        tmp |= (cfg->deq_sp & QMI_DEQ_CFG_SP_MASK) << QMI_DEQ_CFG_SP_SHIFT;
        tmp |= cfg->deq_byte_cnt;
        iowrite32be(tmp, &regs->fmqm_pndc);

        return 0;
}

static void stop_port_hwp(struct fman_port *port)
{
        struct fman_port_hwp_regs __iomem *regs = port->hwp_regs;
        int cnt = 100;

        iowrite32be(HWP_HXS_PCAC_PSTOP, &regs->fmpr_pcac);

        while (cnt-- > 0 &&
               (ioread32be(&regs->fmpr_pcac) & HWP_HXS_PCAC_PSTAT))
                udelay(10);
        if (!cnt)
                pr_err("Timeout stopping HW Parser\n");
}

static void start_port_hwp(struct fman_port *port)
{
        struct fman_port_hwp_regs __iomem *regs = port->hwp_regs;
        int cnt = 100;

        iowrite32be(0, &regs->fmpr_pcac);

        while (cnt-- > 0 &&
               !(ioread32be(&regs->fmpr_pcac) & HWP_HXS_PCAC_PSTAT))
                udelay(10);
        if (!cnt)
                pr_err("Timeout starting HW Parser\n");
}

static void init_hwp(struct fman_port *port)
{
        struct fman_port_hwp_regs __iomem *regs = port->hwp_regs;
        int i;

        stop_port_hwp(port);

        for (i = 0; i < HWP_HXS_COUNT; i++) {
                /* enable HXS error reporting into FD[STATUS] PHE */
                iowrite32be(0x00000000, &regs->pmda[i].ssa);
                iowrite32be(0xffffffff, &regs->pmda[i].lcv);
        }

        /* Short packet padding removal from checksum calculation */
        iowrite32be(HWP_HXS_SH_PAD_REM, &regs->pmda[HWP_HXS_TCP_OFFSET].ssa);
        iowrite32be(HWP_HXS_SH_PAD_REM, &regs->pmda[HWP_HXS_UDP_OFFSET].ssa);

        start_port_hwp(port);
}

static int init(struct fman_port *port)
{
        int err;

        /* Init BMI registers */
        switch (port->port_type) {
        case FMAN_PORT_TYPE_RX:
                err = init_bmi_rx(port);
                if (!err)
                        init_hwp(port);
                break;
        case FMAN_PORT_TYPE_TX:
                err = init_bmi_tx(port);
                break;
        default:
                return -EINVAL;
        }

        if (err)
                return err;

        /* Init QMI registers */
        err = init_qmi(port);
        if (err)
                return err;

        return 0;
}

static int set_bpools(const struct fman_port *port,
                      const struct fman_port_bpools *bp)
{
        u32 __iomem *bp_reg, *bp_depl_reg;
        u32 tmp;
        u8 i, max_bp_num;
        bool grp_depl_used = false, rx_port;

        switch (port->port_type) {
        case FMAN_PORT_TYPE_RX:
                max_bp_num = port->ext_pools_num;
                rx_port = true;
                bp_reg = port->bmi_regs->rx.fmbm_ebmpi;
                bp_depl_reg = &port->bmi_regs->rx.fmbm_mpd;
                break;
        default:
                return -EINVAL;
        }

        if (rx_port) {
                /* Check buffers are provided in ascending order */
                for (i = 0; (i < (bp->count - 1) &&
                             (i < FMAN_PORT_MAX_EXT_POOLS_NUM - 1)); i++) {
                        if (bp->bpool[i].size > bp->bpool[i + 1].size)
                                return -EINVAL;
                }
        }

        /* Set up external buffers pools */
        for (i = 0; i < bp->count; i++) {
                tmp = BMI_EXT_BUF_POOL_VALID;
                tmp |= ((u32)bp->bpool[i].bpid <<
                        BMI_EXT_BUF_POOL_ID_SHIFT) & BMI_EXT_BUF_POOL_ID_MASK;

                if (rx_port) {
                        if (bp->counters_enable)
                                tmp |= BMI_EXT_BUF_POOL_EN_COUNTER;

                        if (bp->bpool[i].is_backup)
                                tmp |= BMI_EXT_BUF_POOL_BACKUP;

                        tmp |= (u32)bp->bpool[i].size;
                }

                iowrite32be(tmp, &bp_reg[i]);
        }

        /* Clear unused pools */
        for (i = bp->count; i < max_bp_num; i++)
                iowrite32be(0, &bp_reg[i]);

        /* Pools depletion */
        tmp = 0;
        for (i = 0; i < FMAN_PORT_MAX_EXT_POOLS_NUM; i++) {
                if (bp->bpool[i].grp_bp_depleted) {
                        grp_depl_used = true;
                        tmp |= 0x80000000 >> i;
                }

                if (bp->bpool[i].single_bp_depleted)
                        tmp |= 0x80 >> i;
        }

        if (grp_depl_used)
                tmp |= ((u32)bp->grp_bp_depleted_num - 1) <<
                    BMI_POOL_DEP_NUM_OF_POOLS_SHIFT;

        iowrite32be(tmp, bp_depl_reg);
        return 0;
}

static bool is_init_done(struct fman_port_cfg *cfg)
{
        /* Checks if FMan port driver parameters were initialized */
        if (!cfg)
                return true;

        return false;
}

static int verify_size_of_fifo(struct fman_port *port)
{
        u32 min_fifo_size_required = 0, opt_fifo_size_for_b2b = 0;

        /* TX Ports */
        if (port->port_type == FMAN_PORT_TYPE_TX) {
                min_fifo_size_required = (u32)
                    (roundup(port->max_frame_length,
                             FMAN_BMI_FIFO_UNITS) + (3 * FMAN_BMI_FIFO_UNITS));

                min_fifo_size_required +=
                    port->cfg->tx_fifo_deq_pipeline_depth *
                    FMAN_BMI_FIFO_UNITS;

                opt_fifo_size_for_b2b = min_fifo_size_required;

                /* Add some margin for back-to-back capability to improve
                 * performance, allows the hardware to pipeline new frame dma
                 * while the previous frame not yet transmitted.
                 */
                if (port->port_speed == 10000)
                        opt_fifo_size_for_b2b += 3 * FMAN_BMI_FIFO_UNITS;
                else
                        opt_fifo_size_for_b2b += 2 * FMAN_BMI_FIFO_UNITS;
        }

        /* RX Ports */
        else if (port->port_type == FMAN_PORT_TYPE_RX) {
                if (port->rev_info.major >= 6)
                        min_fifo_size_required = (u32)
                        (roundup(port->max_frame_length,
                                 FMAN_BMI_FIFO_UNITS) +
                                 (5 * FMAN_BMI_FIFO_UNITS));
                        /* 4 according to spec + 1 for FOF>0 */
                else
                        min_fifo_size_required = (u32)
                        (roundup(min(port->max_frame_length,
                                     port->rx_pools_params.largest_buf_size),
                                     FMAN_BMI_FIFO_UNITS) +
                                     (7 * FMAN_BMI_FIFO_UNITS));

                opt_fifo_size_for_b2b = min_fifo_size_required;

                /* Add some margin for back-to-back capability to improve
                 * performance,allows the hardware to pipeline new frame dma
                 * while the previous frame not yet transmitted.
                 */
                if (port->port_speed == 10000)
                        opt_fifo_size_for_b2b += 8 * FMAN_BMI_FIFO_UNITS;
                else
                        opt_fifo_size_for_b2b += 3 * FMAN_BMI_FIFO_UNITS;
        }

        WARN_ON(min_fifo_size_required <= 0);
        WARN_ON(opt_fifo_size_for_b2b < min_fifo_size_required);

        /* Verify the size  */
        if (port->fifo_bufs.num < min_fifo_size_required)
                dev_dbg(port->dev, "%s: FIFO size should be enlarged to %d bytes\n",
                        __func__, min_fifo_size_required);
        else if (port->fifo_bufs.num < opt_fifo_size_for_b2b)
                dev_dbg(port->dev, "%s: For b2b processing,FIFO may be enlarged to %d bytes\n",
                        __func__, opt_fifo_size_for_b2b);

        return 0;
}

static int set_ext_buffer_pools(struct fman_port *port)
{
        struct fman_ext_pools *ext_buf_pools = &port->cfg->ext_buf_pools;
        struct fman_buf_pool_depletion *buf_pool_depletion =
        &port->cfg->buf_pool_depletion;
        u8 ordered_array[FMAN_PORT_MAX_EXT_POOLS_NUM];
        u16 sizes_array[BM_MAX_NUM_OF_POOLS];
        int i = 0, j = 0, err;
        struct fman_port_bpools bpools;

        memset(&ordered_array, 0, sizeof(u8) * FMAN_PORT_MAX_EXT_POOLS_NUM);
        memset(&sizes_array, 0, sizeof(u16) * BM_MAX_NUM_OF_POOLS);
        memcpy(&port->ext_buf_pools, ext_buf_pools,
               sizeof(struct fman_ext_pools));

        fman_sp_set_buf_pools_in_asc_order_of_buf_sizes(ext_buf_pools,
                                                        ordered_array,
                                                        sizes_array);

        memset(&bpools, 0, sizeof(struct fman_port_bpools));
        bpools.count = ext_buf_pools->num_of_pools_used;
        bpools.counters_enable = true;
        for (i = 0; i < ext_buf_pools->num_of_pools_used; i++) {
                bpools.bpool[i].bpid = ordered_array[i];
                bpools.bpool[i].size = sizes_array[ordered_array[i]];
        }

        /* save pools parameters for later use */
        port->rx_pools_params.num_of_pools = ext_buf_pools->num_of_pools_used;
        port->rx_pools_params.largest_buf_size =
            sizes_array[ordered_array[ext_buf_pools->num_of_pools_used - 1]];

        /* FMBM_RMPD reg. - pool depletion */
        if (buf_pool_depletion->pools_grp_mode_enable) {
                bpools.grp_bp_depleted_num = buf_pool_depletion->num_of_pools;
                for (i = 0; i < port->bm_max_num_of_pools; i++) {
                        if (buf_pool_depletion->pools_to_consider[i]) {
                                for (j = 0; j < ext_buf_pools->
                                     num_of_pools_used; j++) {
                                        if (i == ordered_array[j]) {
                                                bpools.bpool[j].
                                                    grp_bp_depleted = true;
                                                break;
                                        }
                                }
                        }
                }
        }

        if (buf_pool_depletion->single_pool_mode_enable) {
                for (i = 0; i < port->bm_max_num_of_pools; i++) {
                        if (buf_pool_depletion->
                            pools_to_consider_for_single_mode[i]) {
                                for (j = 0; j < ext_buf_pools->
                                     num_of_pools_used; j++) {
                                        if (i == ordered_array[j]) {
                                                bpools.bpool[j].
                                                    single_bp_depleted = true;
                                                break;
                                        }
                                }
                        }
                }
        }

        err = set_bpools(port, &bpools);
        if (err != 0) {
                dev_err(port->dev, "%s: set_bpools() failed\n", __func__);
                return -EINVAL;
        }

        return 0;
}

static int init_low_level_driver(struct fman_port *port)
{
        struct fman_port_cfg *cfg = port->cfg;
        u32 tmp_val;

        switch (port->port_type) {
        case FMAN_PORT_TYPE_RX:
                cfg->err_mask = (RX_ERRS_TO_ENQ & ~cfg->discard_mask);
                break;
        default:

                break;
        }

        tmp_val = (u32)((port->internal_buf_offset % OFFSET_UNITS) ?
                (port->internal_buf_offset / OFFSET_UNITS + 1) :
                (port->internal_buf_offset / OFFSET_UNITS));
        port->internal_buf_offset = (u8)(tmp_val * OFFSET_UNITS);
        port->cfg->int_buf_start_margin = port->internal_buf_offset;

        if (init(port) != 0) {
                dev_err(port->dev, "%s: fman port initialization failed\n",
                        __func__);
                return -ENODEV;
        }

        /* The code bellow is a trick so the FM will not release the buffer
         * to BM nor will try to enqueue the frame to QM
         */
        if (port->port_type == FMAN_PORT_TYPE_TX) {
                if (!cfg->dflt_fqid && cfg->dont_release_buf) {
                        /* override fmbm_tcfqid 0 with a false non-0 value.
                         * This will force FM to act according to tfene.
                         * Otherwise, if fmbm_tcfqid is 0 the FM will release
                         * buffers to BM regardless of fmbm_tfene
                         */
                        iowrite32be(0xFFFFFF, &port->bmi_regs->tx.fmbm_tcfqid);
                        iowrite32be(NIA_ENG_BMI | NIA_BMI_AC_TX_RELEASE,
                                    &port->bmi_regs->tx.fmbm_tfene);
                }
        }

        return 0;
}

static int fill_soc_specific_params(struct fman_port *port)
{
        u32 bmi_max_fifo_size;

        bmi_max_fifo_size = fman_get_bmi_max_fifo_size(port->fm);
        port->max_port_fifo_size = MAX_PORT_FIFO_SIZE(bmi_max_fifo_size);
        port->bm_max_num_of_pools = 64;

        /* P4080 - Major 2
         * P2041/P3041/P5020/P5040 - Major 3
         * Tx/Bx - Major 6
         */
        switch (port->rev_info.major) {
        case 2:
        case 3:
                port->max_num_of_ext_pools              = 4;
                port->max_num_of_sub_portals            = 12;
                break;

        case 6:
                port->max_num_of_ext_pools              = 8;
                port->max_num_of_sub_portals            = 16;
                break;

        default:
                dev_err(port->dev, "%s: Unsupported FMan version\n", __func__);
                return -EINVAL;
        }

        return 0;
}

static int get_dflt_fifo_deq_pipeline_depth(u8 major, enum fman_port_type type,
                                            u16 speed)
{
        switch (type) {
        case FMAN_PORT_TYPE_RX:
        case FMAN_PORT_TYPE_TX:
                switch (speed) {
                case 10000:
                        return 4;
                case 1000:
                        if (major >= 6)
                                return 2;
                        else
                                return 1;
                default:
                        return 0;
                }
        default:
                return 0;
        }
}

static int get_dflt_num_of_tasks(u8 major, enum fman_port_type type,
                                 u16 speed)
{
        switch (type) {
        case FMAN_PORT_TYPE_RX:
        case FMAN_PORT_TYPE_TX:
                switch (speed) {
                case 10000:
                        return 16;
                case 1000:
                        if (major >= 6)
                                return 4;
                        else
                                return 3;
                default:
                        return 0;
                }
        default:
                return 0;
        }
}

static int get_dflt_extra_num_of_tasks(u8 major, enum fman_port_type type,
                                       u16 speed)
{
        switch (type) {
        case FMAN_PORT_TYPE_RX:
                /* FMan V3 */
                if (major >= 6)
                        return 0;

                /* FMan V2 */
                if (speed == 10000)
                        return 8;
                else
                        return 2;
        case FMAN_PORT_TYPE_TX:
        default:
                return 0;
        }
}

static int get_dflt_num_of_open_dmas(u8 major, enum fman_port_type type,
                                     u16 speed)
{
        int val;

        if (major >= 6) {
                switch (type) {
                case FMAN_PORT_TYPE_TX:
                        if (speed == 10000)
                                val = 12;
                        else
                                val = 3;
                        break;
                case FMAN_PORT_TYPE_RX:
                        if (speed == 10000)
                                val = 8;
                        else
                                val = 2;
                        break;
                default:
                        return 0;
                }
        } else {
                switch (type) {
                case FMAN_PORT_TYPE_TX:
                case FMAN_PORT_TYPE_RX:
                        if (speed == 10000)
                                val = 8;
                        else
                                val = 1;
                        break;
                default:
                        val = 0;
                }
        }

        return val;
}

static int get_dflt_extra_num_of_open_dmas(u8 major, enum fman_port_type type,
                                           u16 speed)
{
        /* FMan V3 */
        if (major >= 6)
                return 0;

        /* FMan V2 */
        switch (type) {
        case FMAN_PORT_TYPE_RX:
        case FMAN_PORT_TYPE_TX:
                if (speed == 10000)
                        return 8;
                else
                        return 1;
        default:
                return 0;
        }
}

static int get_dflt_num_of_fifo_bufs(u8 major, enum fman_port_type type,
                                     u16 speed)
{
        int val;

        if (major >= 6) {
                switch (type) {
                case FMAN_PORT_TYPE_TX:
                        if (speed == 10000)
                                val = 64;
                        else
                                val = 50;
                        break;
                case FMAN_PORT_TYPE_RX:
                        if (speed == 10000)
                                val = 96;
                        else
                                val = 50;
                        break;
                default:
                        val = 0;
                }
        } else {
                switch (type) {
                case FMAN_PORT_TYPE_TX:
                        if (speed == 10000)
                                val = 48;
                        else
                                val = 44;
                        break;
                case FMAN_PORT_TYPE_RX:
                        if (speed == 10000)
                                val = 48;
                        else
                                val = 45;
                        break;
                default:
                        val = 0;
                }
        }

        return val;
}

static void set_dflt_cfg(struct fman_port *port,
                         struct fman_port_params *port_params)
{
        struct fman_port_cfg *cfg = port->cfg;

        cfg->dma_swap_data = FMAN_PORT_DMA_NO_SWAP;
        cfg->color = FMAN_PORT_COLOR_GREEN;
        cfg->rx_cut_end_bytes = DFLT_PORT_CUT_BYTES_FROM_END;
        cfg->rx_pri_elevation = BMI_PRIORITY_ELEVATION_LEVEL;
        cfg->rx_fifo_thr = BMI_FIFO_THRESHOLD;
        cfg->tx_fifo_low_comf_level = (5 * 1024);
        cfg->deq_type = FMAN_PORT_DEQ_BY_PRI;
        cfg->deq_prefetch_option = FMAN_PORT_DEQ_FULL_PREFETCH;
        cfg->tx_fifo_deq_pipeline_depth =
                BMI_DEQUEUE_PIPELINE_DEPTH(port->port_type, port->port_speed);
        cfg->deq_byte_cnt = QMI_BYTE_COUNT_LEVEL_CONTROL(port->port_type);

        cfg->rx_pri_elevation =
                DFLT_PORT_RX_FIFO_PRI_ELEVATION_LEV(port->max_port_fifo_size);
        port->cfg->rx_fifo_thr =
                DFLT_PORT_RX_FIFO_THRESHOLD(port->rev_info.major,
                                            port->max_port_fifo_size);

        if ((port->rev_info.major == 6) &&
            ((port->rev_info.minor == 0) || (port->rev_info.minor == 3)))
                cfg->errata_A006320 = true;

        /* Excessive Threshold register - exists for pre-FMv3 chips only */
        if (port->rev_info.major < 6)
                cfg->excessive_threshold_register = true;
        else
                cfg->fmbm_tfne_has_features = true;

        cfg->buffer_prefix_content.data_align =
                DFLT_PORT_BUFFER_PREFIX_CONTEXT_DATA_ALIGN;
}

static void set_rx_dflt_cfg(struct fman_port *port,
                            struct fman_port_params *port_params)
{
        port->cfg->discard_mask = DFLT_PORT_ERRORS_TO_DISCARD;

        memcpy(&port->cfg->ext_buf_pools,
               &port_params->specific_params.rx_params.ext_buf_pools,
               sizeof(struct fman_ext_pools));
        port->cfg->err_fqid =
                port_params->specific_params.rx_params.err_fqid;
        port->cfg->dflt_fqid =
                port_params->specific_params.rx_params.dflt_fqid;
        port->cfg->pcd_base_fqid =
                port_params->specific_params.rx_params.pcd_base_fqid;
        port->cfg->pcd_fqs_count =
                port_params->specific_params.rx_params.pcd_fqs_count;
}

static void set_tx_dflt_cfg(struct fman_port *port,
                            struct fman_port_params *port_params,
                            struct fman_port_dts_params *dts_params)
{
        port->cfg->tx_fifo_deq_pipeline_depth =
                get_dflt_fifo_deq_pipeline_depth(port->rev_info.major,
                                                 port->port_type,
                                                 port->port_speed);
        port->cfg->err_fqid =
                port_params->specific_params.non_rx_params.err_fqid;
        port->cfg->deq_sp =
                (u8)(dts_params->qman_channel_id & QMI_DEQ_CFG_SUBPORTAL_MASK);
        port->cfg->dflt_fqid =
                port_params->specific_params.non_rx_params.dflt_fqid;
        port->cfg->deq_high_priority = true;
}

/**
 * fman_port_config
 * @port:       Pointer to the port structure
 * @params:     Pointer to data structure of parameters
 *
 * Creates a descriptor for the FM PORT module.
 * The routine returns a pointer to the FM PORT object.
 * This descriptor must be passed as first parameter to all other FM PORT
 * function calls.
 * No actual initialization or configuration of FM hardware is done by this
 * routine.
 *
 * Return: 0 on success; Error code otherwise.
 */
int fman_port_config(struct fman_port *port, struct fman_port_params *params)
{
        void __iomem *base_addr = port->dts_params.base_addr;
        int err;

        /* Allocate the FM driver's parameters structure */
        port->cfg = kzalloc(sizeof(*port->cfg), GFP_KERNEL);
        if (!port->cfg)
                return -EINVAL;

        /* Initialize FM port parameters which will be kept by the driver */
        port->port_type = port->dts_params.type;
        port->port_speed = port->dts_params.speed;
        port->port_id = port->dts_params.id;
        port->fm = port->dts_params.fman;
        port->ext_pools_num = (u8)8;

        /* get FM revision */
        fman_get_revision(port->fm, &port->rev_info);

        err = fill_soc_specific_params(port);
        if (err)
                goto err_port_cfg;

        switch (port->port_type) {
        case FMAN_PORT_TYPE_RX:
                set_rx_dflt_cfg(port, params);
                fallthrough;
        case FMAN_PORT_TYPE_TX:
                set_tx_dflt_cfg(port, params, &port->dts_params);
                fallthrough;
        default:
                set_dflt_cfg(port, params);
        }

        /* Continue with other parameters */
        /* set memory map pointers */
        port->bmi_regs = base_addr + BMI_PORT_REGS_OFFSET;
        port->qmi_regs = base_addr + QMI_PORT_REGS_OFFSET;
        port->hwp_regs = base_addr + HWP_PORT_REGS_OFFSET;

        port->max_frame_length = DFLT_PORT_MAX_FRAME_LENGTH;
        /* resource distribution. */

        port->fifo_bufs.num =
        get_dflt_num_of_fifo_bufs(port->rev_info.major, port->port_type,
                                  port->port_speed) * FMAN_BMI_FIFO_UNITS;
        port->fifo_bufs.extra =
        DFLT_PORT_EXTRA_NUM_OF_FIFO_BUFS * FMAN_BMI_FIFO_UNITS;

        port->open_dmas.num =
        get_dflt_num_of_open_dmas(port->rev_info.major,
                                  port->port_type, port->port_speed);
        port->open_dmas.extra =
        get_dflt_extra_num_of_open_dmas(port->rev_info.major,
                                        port->port_type, port->port_speed);
        port->tasks.num =
        get_dflt_num_of_tasks(port->rev_info.major,
                              port->port_type, port->port_speed);
        port->tasks.extra =
        get_dflt_extra_num_of_tasks(port->rev_info.major,
                                    port->port_type, port->port_speed);

        /* FM_HEAVY_TRAFFIC_SEQUENCER_HANG_ERRATA_FMAN_A006981 errata
         * workaround
         */
        if ((port->rev_info.major == 6) && (port->rev_info.minor == 0) &&
            (((port->port_type == FMAN_PORT_TYPE_TX) &&
            (port->port_speed == 1000)))) {
                port->open_dmas.num = 16;
                port->open_dmas.extra = 0;
        }

        if (port->rev_info.major >= 6 &&
            port->port_type == FMAN_PORT_TYPE_TX &&
            port->port_speed == 1000) {
                /* FM_WRONG_RESET_VALUES_ERRATA_FMAN_A005127 Errata
                 * workaround
                 */
                u32 reg;

                reg = 0x00001013;
                iowrite32be(reg, &port->bmi_regs->tx.fmbm_tfp);
        }

        return 0;

err_port_cfg:
        kfree(port->cfg);
        return -EINVAL;
}
EXPORT_SYMBOL(fman_port_config);

/*
 * fman_port_use_kg_hash
 * @port: A pointer to a FM Port module.
 * @enable: enable or disable
 *
 * Sets the HW KeyGen or the BMI as HW Parser next engine, enabling
 * or bypassing the KeyGen hashing of Rx traffic
 */
void fman_port_use_kg_hash(struct fman_port *port, bool enable)
{
        if (enable)
                /* After the Parser frames go to KeyGen */
                iowrite32be(NIA_ENG_HWK, &port->bmi_regs->rx.fmbm_rfpne);
        else
                /* After the Parser frames go to BMI */
                iowrite32be(NIA_ENG_BMI | NIA_BMI_AC_ENQ_FRAME,
                            &port->bmi_regs->rx.fmbm_rfpne);
}
EXPORT_SYMBOL(fman_port_use_kg_hash);

/**
 * fman_port_init
 * @port:       A pointer to a FM Port module.
 *
 * Initializes the FM PORT module by defining the software structure and
 * configuring the hardware registers.
 *
 * Return: 0 on success; Error code otherwise.
 */
int fman_port_init(struct fman_port *port)
{
        struct fman_port_init_params params;
        struct fman_keygen *keygen;
        struct fman_port_cfg *cfg;
        int err;

        if (is_init_done(port->cfg))
                return -EINVAL;

        err = fman_sp_build_buffer_struct(&port->cfg->int_context,
                                          &port->cfg->buffer_prefix_content,
                                          &port->cfg->buf_margins,
                                          &port->buffer_offsets,
                                          &port->internal_buf_offset);
        if (err)
                return err;

        cfg = port->cfg;

        if (port->port_type == FMAN_PORT_TYPE_RX) {
                /* Call the external Buffer routine which also checks fifo
                 * size and updates it if necessary
                 */
                /* define external buffer pools and pool depletion */
                err = set_ext_buffer_pools(port);
                if (err)
                        return err;
                /* check if the largest external buffer pool is large enough */
                if (cfg->buf_margins.start_margins + MIN_EXT_BUF_SIZE +
                    cfg->buf_margins.end_margins >
                    port->rx_pools_params.largest_buf_size) {
                        dev_err(port->dev, "%s: buf_margins.start_margins (%d) + minimum buf size (64) + buf_margins.end_margins (%d) is larger than maximum external buffer size (%d)\n",
                                __func__, cfg->buf_margins.start_margins,
                                cfg->buf_margins.end_margins,
                                port->rx_pools_params.largest_buf_size);
                        return -EINVAL;
                }
        }

        /* Call FM module routine for communicating parameters */
        memset(&params, 0, sizeof(params));
        params.port_id = port->port_id;
        params.port_type = port->port_type;
        params.port_speed = port->port_speed;
        params.num_of_tasks = (u8)port->tasks.num;
        params.num_of_extra_tasks = (u8)port->tasks.extra;
        params.num_of_open_dmas = (u8)port->open_dmas.num;
        params.num_of_extra_open_dmas = (u8)port->open_dmas.extra;

        if (port->fifo_bufs.num) {
                err = verify_size_of_fifo(port);
                if (err)
                        return err;
        }
        params.size_of_fifo = port->fifo_bufs.num;
        params.extra_size_of_fifo = port->fifo_bufs.extra;
        params.deq_pipeline_depth = port->cfg->tx_fifo_deq_pipeline_depth;
        params.max_frame_length = port->max_frame_length;

        err = fman_set_port_params(port->fm, &params);
        if (err)
                return err;

        err = init_low_level_driver(port);
        if (err)
                return err;

        if (port->cfg->pcd_fqs_count) {
                keygen = port->dts_params.fman->keygen;
                err = keygen_port_hashing_init(keygen, port->port_id,
                                               port->cfg->pcd_base_fqid,
                                               port->cfg->pcd_fqs_count);
                if (err)
                        return err;

                fman_port_use_kg_hash(port, true);
        }

        kfree(port->cfg);
        port->cfg = NULL;

        return 0;
}
EXPORT_SYMBOL(fman_port_init);

/**
 * fman_port_cfg_buf_prefix_content
 * @port:                       A pointer to a FM Port module.
 * @buffer_prefix_content:      A structure of parameters describing
 *                              the structure of the buffer.
 *                              Out parameter:
 *                              Start margin - offset of data from
 *                              start of external buffer.
 * Defines the structure, size and content of the application buffer.
 * The prefix, in Tx ports, if 'pass_prs_result', the application should set
 * a value to their offsets in the prefix of the FM will save the first
 * 'priv_data_size', than, depending on 'pass_prs_result' and
 * 'pass_time_stamp', copy parse result and timeStamp, and the packet itself
 * (in this order), to the application buffer, and to offset.
 * Calling this routine changes the buffer margins definitions in the internal
 * driver data base from its default configuration:
 * Data size:  [DEFAULT_PORT_BUFFER_PREFIX_CONTENT_PRIV_DATA_SIZE]
 * Pass Parser result: [DEFAULT_PORT_BUFFER_PREFIX_CONTENT_PASS_PRS_RESULT].
 * Pass timestamp: [DEFAULT_PORT_BUFFER_PREFIX_CONTENT_PASS_TIME_STAMP].
 * May be used for all ports
 *
 * Allowed only following fman_port_config() and before fman_port_init().
 *
 * Return: 0 on success; Error code otherwise.
 */
int fman_port_cfg_buf_prefix_content(struct fman_port *port,
                                     struct fman_buffer_prefix_content *
                                     buffer_prefix_content)
{
        if (is_init_done(port->cfg))
                return -EINVAL;

        memcpy(&port->cfg->buffer_prefix_content,
               buffer_prefix_content,
               sizeof(struct fman_buffer_prefix_content));
        /* if data_align was not initialized by user,
         * we return to driver's default
         */
        if (!port->cfg->buffer_prefix_content.data_align)
                port->cfg->buffer_prefix_content.data_align =
                DFLT_PORT_BUFFER_PREFIX_CONTEXT_DATA_ALIGN;

        return 0;
}
EXPORT_SYMBOL(fman_port_cfg_buf_prefix_content);

/**
 * fman_port_disable
 * @port:       A pointer to a FM Port module.
 *
 * Gracefully disable an FM port. The port will not start new   tasks after all
 * tasks associated with the port are terminated.
 *
 * This is a blocking routine, it returns after port is gracefully stopped,
 * i.e. the port will not except new frames, but it will finish all frames
 * or tasks which were already began.
 * Allowed only following fman_port_init().
 *
 * Return: 0 on success; Error code otherwise.
 */
int fman_port_disable(struct fman_port *port)
{
        u32 __iomem *bmi_cfg_reg, *bmi_status_reg;
        u32 tmp;
        bool rx_port, failure = false;
        int count;

        if (!is_init_done(port->cfg))
                return -EINVAL;

        switch (port->port_type) {
        case FMAN_PORT_TYPE_RX:
                bmi_cfg_reg = &port->bmi_regs->rx.fmbm_rcfg;
                bmi_status_reg = &port->bmi_regs->rx.fmbm_rst;
                rx_port = true;
                break;
        case FMAN_PORT_TYPE_TX:
                bmi_cfg_reg = &port->bmi_regs->tx.fmbm_tcfg;
                bmi_status_reg = &port->bmi_regs->tx.fmbm_tst;
                rx_port = false;
                break;
        default:
                return -EINVAL;
        }

        /* Disable QMI */
        if (!rx_port) {
                tmp = ioread32be(&port->qmi_regs->fmqm_pnc) & ~QMI_PORT_CFG_EN;
                iowrite32be(tmp, &port->qmi_regs->fmqm_pnc);

                /* Wait for QMI to finish FD handling */
                count = 100;
                do {
                        udelay(10);
                        tmp = ioread32be(&port->qmi_regs->fmqm_pns);
                } while ((tmp & QMI_PORT_STATUS_DEQ_FD_BSY) && --count);

                if (count == 0) {
                        /* Timeout */
                        failure = true;
                }
        }

        /* Disable BMI */
        tmp = ioread32be(bmi_cfg_reg) & ~BMI_PORT_CFG_EN;
        iowrite32be(tmp, bmi_cfg_reg);

        /* Wait for graceful stop end */
        count = 500;
        do {
                udelay(10);
                tmp = ioread32be(bmi_status_reg);
        } while ((tmp & BMI_PORT_STATUS_BSY) && --count);

        if (count == 0) {
                /* Timeout */
                failure = true;
        }

        if (failure)
                dev_dbg(port->dev, "%s: FMan Port[%d]: BMI or QMI is Busy. Port forced down\n",
                        __func__,  port->port_id);

        return 0;
}
EXPORT_SYMBOL(fman_port_disable);

/**
 * fman_port_enable
 * @port:       A pointer to a FM Port module.
 *
 * A runtime routine provided to allow disable/enable of port.
 *
 * Allowed only following fman_port_init().
 *
 * Return: 0 on success; Error code otherwise.
 */
int fman_port_enable(struct fman_port *port)
{
        u32 __iomem *bmi_cfg_reg;
        u32 tmp;
        bool rx_port;

        if (!is_init_done(port->cfg))
                return -EINVAL;

        switch (port->port_type) {
        case FMAN_PORT_TYPE_RX:
                bmi_cfg_reg = &port->bmi_regs->rx.fmbm_rcfg;
                rx_port = true;
                break;
        case FMAN_PORT_TYPE_TX:
                bmi_cfg_reg = &port->bmi_regs->tx.fmbm_tcfg;
                rx_port = false;
                break;
        default:
                return -EINVAL;
        }

        /* Enable QMI */
        if (!rx_port) {
                tmp = ioread32be(&port->qmi_regs->fmqm_pnc) | QMI_PORT_CFG_EN;
                iowrite32be(tmp, &port->qmi_regs->fmqm_pnc);
        }

        /* Enable BMI */
        tmp = ioread32be(bmi_cfg_reg) | BMI_PORT_CFG_EN;
        iowrite32be(tmp, bmi_cfg_reg);

        return 0;
}
EXPORT_SYMBOL(fman_port_enable);

/**
 * fman_port_bind
 * @dev:                FMan Port OF device pointer
 *
 * Bind to a specific FMan Port.
 *
 * Allowed only after the port was created.
 *
 * Return: A pointer to the FMan port device.
 */
struct fman_port *fman_port_bind(struct device *dev)
{
        return (struct fman_port *)(dev_get_drvdata(get_device(dev)));
}
EXPORT_SYMBOL(fman_port_bind);

/**
 * fman_port_get_qman_channel_id
 * @port:       Pointer to the FMan port devuce
 *
 * Get the QMan channel ID for the specific port
 *
 * Return: QMan channel ID
 */
u32 fman_port_get_qman_channel_id(struct fman_port *port)
{
        return port->dts_params.qman_channel_id;
}
EXPORT_SYMBOL(fman_port_get_qman_channel_id);

/**
 * fman_port_get_device
 * @port:       Pointer to the FMan port device
 *
 * Get the 'struct device' associated to the specified FMan port device
 *
 * Return: pointer to associated 'struct device'
 */
struct device *fman_port_get_device(struct fman_port *port)
{
        return port->dev;
}
EXPORT_SYMBOL(fman_port_get_device);

int fman_port_get_hash_result_offset(struct fman_port *port, u32 *offset)
{
        if (port->buffer_offsets.hash_result_offset == ILLEGAL_BASE)
                return -EINVAL;

        *offset = port->buffer_offsets.hash_result_offset;

        return 0;
}
EXPORT_SYMBOL(fman_port_get_hash_result_offset);

int fman_port_get_tstamp(struct fman_port *port, const void *data, u64 *tstamp)
{
        if (port->buffer_offsets.time_stamp_offset == ILLEGAL_BASE)
                return -EINVAL;

        *tstamp = be64_to_cpu(*(__be64 *)(data +
                        port->buffer_offsets.time_stamp_offset));

        return 0;
}
EXPORT_SYMBOL(fman_port_get_tstamp);

static int fman_port_probe(struct platform_device *of_dev)
{
        struct fman_port *port;
        struct fman *fman;
        struct device_node *fm_node, *port_node;
        struct platform_device *fm_pdev;
        struct resource res;
        struct resource *dev_res;
        u32 val;
        int err = 0, lenp;
        enum fman_port_type port_type;
        u16 port_speed;
        u8 port_id;

        port = kzalloc(sizeof(*port), GFP_KERNEL);
        if (!port)
                return -ENOMEM;

        port->dev = &of_dev->dev;

        port_node = of_node_get(of_dev->dev.of_node);

        /* Get the FM node */
        fm_node = of_get_parent(port_node);
        if (!fm_node) {
                dev_err(port->dev, "%s: of_get_parent() failed\n", __func__);
                err = -ENODEV;
                goto return_err;
        }

        fm_pdev = of_find_device_by_node(fm_node);
        of_node_put(fm_node);
        if (!fm_pdev) {
                err = -EINVAL;
                goto return_err;
        }

        fman = dev_get_drvdata(&fm_pdev->dev);
        if (!fman) {
                err = -EINVAL;
                goto return_err;
        }

        err = of_property_read_u32(port_node, "cell-index", &val);
        if (err) {
                dev_err(port->dev, "%s: reading cell-index for %pOF failed\n",
                        __func__, port_node);
                err = -EINVAL;
                goto return_err;
        }
        port_id = (u8)val;
        port->dts_params.id = port_id;

        if (of_device_is_compatible(port_node, "fsl,fman-v3-port-tx")) {
                port_type = FMAN_PORT_TYPE_TX;
                port_speed = 1000;
                if (of_find_property(port_node, "fsl,fman-10g-port", &lenp))
                        port_speed = 10000;

        } else if (of_device_is_compatible(port_node, "fsl,fman-v2-port-tx")) {
                if (port_id >= TX_10G_PORT_BASE)
                        port_speed = 10000;
                else
                        port_speed = 1000;
                port_type = FMAN_PORT_TYPE_TX;

        } else if (of_device_is_compatible(port_node, "fsl,fman-v3-port-rx")) {
                port_type = FMAN_PORT_TYPE_RX;
                port_speed = 1000;
                if (of_find_property(port_node, "fsl,fman-10g-port", &lenp))
                        port_speed = 10000;

        } else if (of_device_is_compatible(port_node, "fsl,fman-v2-port-rx")) {
                if (port_id >= RX_10G_PORT_BASE)
                        port_speed = 10000;
                else
                        port_speed = 1000;
                port_type = FMAN_PORT_TYPE_RX;

        }  else {
                dev_err(port->dev, "%s: Illegal port type\n", __func__);
                err = -EINVAL;
                goto return_err;
        }

        port->dts_params.type = port_type;
        port->dts_params.speed = port_speed;

        if (port_type == FMAN_PORT_TYPE_TX) {
                u32 qman_channel_id;

                qman_channel_id = fman_get_qman_channel_id(fman, port_id);
                if (qman_channel_id == 0) {
                        dev_err(port->dev, "%s: incorrect qman-channel-id\n",
                                __func__);
                        err = -EINVAL;
                        goto return_err;
                }
                port->dts_params.qman_channel_id = qman_channel_id;
        }

        err = of_address_to_resource(port_node, 0, &res);
        if (err < 0) {
                dev_err(port->dev, "%s: of_address_to_resource() failed\n",
                        __func__);
                err = -ENOMEM;
                goto return_err;
        }

        port->dts_params.fman = fman;

        of_node_put(port_node);

        dev_res = __devm_request_region(port->dev, &res, res.start,
                                        resource_size(&res), "fman-port");
        if (!dev_res) {
                dev_err(port->dev, "%s: __devm_request_region() failed\n",
                        __func__);
                err = -EINVAL;
                goto free_port;
        }

        port->dts_params.base_addr = devm_ioremap(port->dev, res.start,
                                                  resource_size(&res));
        if (!port->dts_params.base_addr)
                dev_err(port->dev, "%s: devm_ioremap() failed\n", __func__);

        dev_set_drvdata(&of_dev->dev, port);

        return 0;

return_err:
        of_node_put(port_node);
free_port:
        kfree(port);
        return err;
}

static const struct of_device_id fman_port_match[] = {
        {.compatible = "fsl,fman-v3-port-rx"},
        {.compatible = "fsl,fman-v2-port-rx"},
        {.compatible = "fsl,fman-v3-port-tx"},
        {.compatible = "fsl,fman-v2-port-tx"},
        {}
};

MODULE_DEVICE_TABLE(of, fman_port_match);

static struct platform_driver fman_port_driver = {
        .driver = {
                .name = "fsl-fman-port",
                .of_match_table = fman_port_match,
        },
        .probe = fman_port_probe,
};

static int __init fman_port_load(void)
{
        int err;

        pr_debug("FSL DPAA FMan driver\n");

        err = platform_driver_register(&fman_port_driver);
        if (err < 0)
                pr_err("Error, platform_driver_register() = %d\n", err);

        return err;
}
module_init(fman_port_load);

static void __exit fman_port_unload(void)
{
        platform_driver_unregister(&fman_port_driver);
}
module_exit(fman_port_unload);

MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("Freescale DPAA Frame Manager Port driver");