nxhal_nic_interface.h

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FILE_LICENCE ( GPL2_ONLY );

/*
 * Data types and structure for HAL - NIC interface.
 *
 */

#ifndef _NXHAL_NIC_INTERFACE_H_
#define _NXHAL_NIC_INTERFACE_H_

/*****************************************************************************
 *        Simple Types
 *****************************************************************************/

typedef U32     nx_reg_addr_t;

/*****************************************************************************
 *        Root crb-based firmware commands
 *****************************************************************************/

/* CRB Root Command

   A single set of crbs is used across all physical/virtual
   functions for capability queries, initialization, and
   context creation/destruction. 

   There are 4 CRBS:
       Command/Response CRB
       Argument1 CRB
       Argument2 CRB
       Argument3 CRB
       Signature CRB 

       The cmd/rsp crb is always intiated by the host via
       a command code and always responded by the card with
       a response code. The cmd and rsp codes are disjoint.
       The sequence of use is always CMD, RSP, CLEAR CMD.

       The arguments are for passing in command specific
       and response specific parameters/data. 

       The signature is composed of a magic value, the
       pci function id, and a command sequence id:
          [7:0]  = pci function
         [15:8]  = version
         [31:16] = magic of 0xcafe

       The pci function allows the card to take correct
       action for the given particular commands. 
       The firmware will attempt to detect
       an errant driver that has died while holding  
       the root crb hardware lock. Such an error condition
       shows up as the cmd/rsp crb stuck in a non-clear state.

   Interface Sequence:
     Host always makes requests and firmware always responds.
     Note that data field is always set prior to command field.

     [READ]             CMD/RSP CRB      ARGUMENT FIELD
     Host grab lock
     Host  ->           CMD              optional parameter
     FW   <-  (Good)    RSP-OK           DATA
     FW   <-  (Fail)    RSP-FAIL         optional failure code
     Host ->            CLEAR
     Host release lock

     [WRITE]            CMD/RSP CRB      ARGUMENT FIELD
     Host grab lock
     Host  ->           CMD              DATA
     FW   <-  (Good)    RSP-OK           optional write status
     FW   <-  (Write)   RSP-FAIL         optional failure code
     Host ->            CLEAR
     Host release lock

*/


/*****************************************************************************
 *        CMD/RSP
 *****************************************************************************/

#define NX_CDRP_SIGNATURE_TO_PCIFN(sign)    ((sign) & 0xff)
#define NX_CDRP_SIGNATURE_TO_VERSION(sign)  (((sign)>>8) & 0xff)
#define NX_CDRP_SIGNATURE_TO_MAGIC(sign)    (((sign)>>16) & 0xffff)
#define NX_CDRP_SIGNATURE_VALID(sign)       \
        ( NX_CDRP_SIGNATURE_TO_MAGIC(sign) == 0xcafe && \
          NX_CDRP_SIGNATURE_TO_PCIFN(sign) < 8)
#define NX_CDRP_SIGNATURE_MAKE(pcifn,version) \
        ( ((pcifn) & 0xff) |                  \
          (((version) & 0xff) << 8) |         \
          (0xcafe << 16) )

#define NX_CDRP_CLEAR                       0x00000000
#define NX_CDRP_CMD_BIT                     0x80000000

/* All responses must have the NX_CDRP_CMD_BIT cleared
 * in the crb NX_CDRP_CRB_OFFSET. */
#define NX_CDRP_FORM_RSP(rsp)              (rsp)
#define NX_CDRP_IS_RSP(rsp)                (((rsp) & NX_CDRP_CMD_BIT) == 0)

#define NX_CDRP_RSP_OK                      0x00000001
#define NX_CDRP_RSP_FAIL                    0x00000002
#define NX_CDRP_RSP_TIMEOUT                 0x00000003

/* All commands must have the NX_CDRP_CMD_BIT set in
 * the crb NX_CDRP_CRB_OFFSET.
 * The macros below do not have it explicitly set to
 * allow their use in lookup tables */
#define NX_CDRP_FORM_CMD(cmd)               (NX_CDRP_CMD_BIT | (cmd))
#define NX_CDRP_IS_CMD(cmd)                 (((cmd) & NX_CDRP_CMD_BIT) != 0)

/* [CMD] Capability Vector [RSP] Capability Vector */
#define NX_CDRP_CMD_SUBMIT_CAPABILITIES     0x00000001

/* [CMD] - [RSP] Query Value */
#define NX_CDRP_CMD_READ_MAX_RDS_PER_CTX    0x00000002

/* [CMD] - [RSP] Query Value */
#define NX_CDRP_CMD_READ_MAX_SDS_PER_CTX    0x00000003

/* [CMD] - [RSP] Query Value */
#define NX_CDRP_CMD_READ_MAX_RULES_PER_CTX  0x00000004

/* [CMD] - [RSP] Query Value */
#define NX_CDRP_CMD_READ_MAX_RX_CTX         0x00000005

/* [CMD] - [RSP] Query Value */
#define NX_CDRP_CMD_READ_MAX_TX_CTX         0x00000006

/* [CMD] Rx Config DMA Addr [RSP] rcode */
#define NX_CDRP_CMD_CREATE_RX_CTX           0x00000007

/* [CMD] Rx Context Handle, Reset Kind [RSP] rcode */
#define NX_CDRP_CMD_DESTROY_RX_CTX          0x00000008

/* [CMD] Tx Config DMA Addr [RSP] rcode */
#define NX_CDRP_CMD_CREATE_TX_CTX           0x00000009

/* [CMD] Tx Context Handle, Reset Kind [RSP] rcode */
#define NX_CDRP_CMD_DESTROY_TX_CTX          0x0000000a

/* [CMD] Stat setup dma addr - [RSP] Handle, rcode */
#define NX_CDRP_CMD_SETUP_STATISTICS        0x0000000e

/* [CMD] Handle - [RSP] rcode */
#define NX_CDRP_CMD_GET_STATISTICS          0x0000000f

/* [CMD] Handle - [RSP] rcode */
#define NX_CDRP_CMD_DELETE_STATISTICS       0x00000010

#define NX_CDRP_CMD_MAX                     0x00000011

/*****************************************************************************
 *        Capabilities
 *****************************************************************************/

#define NX_CAP_BIT(class, bit)              (1 << bit)

/* Class 0 (i.e. ARGS 1)
 */
#define NX_CAP0_LEGACY_CONTEXT              NX_CAP_BIT(0, 0)
#define NX_CAP0_MULTI_CONTEXT               NX_CAP_BIT(0, 1)
#define NX_CAP0_LEGACY_MN                   NX_CAP_BIT(0, 2)
#define NX_CAP0_LEGACY_MS                   NX_CAP_BIT(0, 3)
#define NX_CAP0_CUT_THROUGH                 NX_CAP_BIT(0, 4)
#define NX_CAP0_LRO                         NX_CAP_BIT(0, 5)
#define NX_CAP0_LSO                         NX_CAP_BIT(0, 6)

/* Class 1 (i.e. ARGS 2)
 */
#define NX_CAP1_NIC                         NX_CAP_BIT(1, 0)
#define NX_CAP1_PXE                         NX_CAP_BIT(1, 1)
#define NX_CAP1_CHIMNEY                     NX_CAP_BIT(1, 2)
#define NX_CAP1_LSA                         NX_CAP_BIT(1, 3)
#define NX_CAP1_RDMA                        NX_CAP_BIT(1, 4)
#define NX_CAP1_ISCSI                       NX_CAP_BIT(1, 5)
#define NX_CAP1_FCOE                        NX_CAP_BIT(1, 6)

/* Class 2 (i.e. ARGS 3)
 */

/*****************************************************************************
 *        Rules
 *****************************************************************************/

typedef U32 nx_rx_rule_type_t;

#define NX_RX_RULETYPE_DEFAULT              0
#define NX_RX_RULETYPE_MAC                  1
#define NX_RX_RULETYPE_MAC_VLAN             2
#define NX_RX_RULETYPE_MAC_RSS              3
#define NX_RX_RULETYPE_MAC_VLAN_RSS         4
#define NX_RX_RULETYPE_MAX                  5

typedef U32 nx_rx_rule_cmd_t;

#define NX_RX_RULECMD_ADD                   0
#define NX_RX_RULECMD_REMOVE                1
#define NX_RX_RULECMD_MAX                   2

typedef struct nx_rx_rule_arg_s {
        union {
                struct {
                        char mac[6];
                } m;
                struct {
                        char mac[6];
                        char vlan;
                } mv;
                struct {
                        char mac[6];
                } mr;
                struct {
                        char mac[6];
                        char vlan;
                } mvr;
        };
        /* will be union of all the different args for rules */
        U64 data;
} nx_rx_rule_arg_t;

typedef struct nx_rx_rule_s {
        U32 id;
        U32 active;
        nx_rx_rule_arg_t arg;
        nx_rx_rule_type_t type;
} nx_rx_rule_t;

/* MSG - REQUIRES TX CONTEXT */

/* The rules can be added/deleted from both the
 *  host and card sides so rq/rsp are similar. 
 */
typedef struct nx_hostmsg_rx_rule_s {
        nx_rx_rule_cmd_t cmd;
        nx_rx_rule_t rule;
} nx_hostmsg_rx_rule_t;

typedef struct nx_cardmsg_rx_rule_s {
        nx_rcode_t rcode;
        nx_rx_rule_cmd_t cmd;
        nx_rx_rule_t rule;
} nx_cardmsg_rx_rule_t;


/*****************************************************************************
 *        Common to Rx/Tx contexts
 *****************************************************************************/

/*
 * Context states
 */

typedef U32 nx_host_ctx_state_t;

#define NX_HOST_CTX_STATE_FREED             0   /* Invalid state */
#define NX_HOST_CTX_STATE_ALLOCATED         1   /* Not committed */
/* The following states imply FW is aware of context */
#define NX_HOST_CTX_STATE_ACTIVE            2
#define NX_HOST_CTX_STATE_DISABLED          3
#define NX_HOST_CTX_STATE_QUIESCED          4
#define NX_HOST_CTX_STATE_MAX               5

/*
 * Interrupt mask crb use must be set identically on the Tx 
 * and Rx context configs across a pci function 
 */

/* Rx and Tx have unique interrupt/crb */
#define NX_HOST_INT_CRB_MODE_UNIQUE         0
/* Rx and Tx share a common interrupt/crb */
#define NX_HOST_INT_CRB_MODE_SHARED         1   /* <= LEGACY */
/* Rx does not use a crb */
#define NX_HOST_INT_CRB_MODE_NORX           2
/* Tx does not use a crb */
#define NX_HOST_INT_CRB_MODE_NOTX           3
/* Neither Rx nor Tx use a crb */
#define NX_HOST_INT_CRB_MODE_NORXTX         4

/*
 * Destroy Rx/Tx
 */

#define NX_DESTROY_CTX_RESET                0
#define NX_DESTROY_CTX_D3_RESET             1
#define NX_DESTROY_CTX_MAX                  2


/*****************************************************************************
 *        Tx
 *****************************************************************************/

/*
 * Components of the host-request for Tx context creation.
 * CRB - DOES NOT REQUIRE Rx/TX CONTEXT 
 */

typedef struct nx_hostrq_cds_ring_s {
        U64 host_phys_addr;     /* Ring base addr */
        U32 ring_size;          /* Ring entries */
        U32 rsvd;               /* Padding */
} nx_hostrq_cds_ring_t;

typedef struct nx_hostrq_tx_ctx_s {
        U64 host_rsp_dma_addr;  /* Response dma'd here */
        U64 cmd_cons_dma_addr;  /*  */
        U64 dummy_dma_addr;     /*  */
        U32 capabilities[4];    /* Flag bit vector */
        U32 host_int_crb_mode;  /* Interrupt crb usage */
        U32 rsvd1;              /* Padding */
        U16 rsvd2;              /* Padding */
        U16 interrupt_ctl;
        U16 msi_index;
        U16 rsvd3;              /* Padding */
        nx_hostrq_cds_ring_t cds_ring;  /* Desc of cds ring */
        U8  reserved[128];      /* future expansion */
} nx_hostrq_tx_ctx_t;

typedef struct nx_cardrsp_cds_ring_s {
        U32 host_producer_crb;  /* Crb to use */
        U32 interrupt_crb;      /* Crb to use */
} nx_cardrsp_cds_ring_t;

typedef struct nx_cardrsp_tx_ctx_s {
        U32 host_ctx_state;     /* Starting state */
        U16 context_id;         /* Handle for context */
        U8  phys_port;          /* Physical id of port */
        U8  virt_port;          /* Virtual/Logical id of port */
        nx_cardrsp_cds_ring_t cds_ring; /* Card cds settings */
        U8  reserved[128];      /* future expansion */
} nx_cardrsp_tx_ctx_t;

#define SIZEOF_HOSTRQ_TX(HOSTRQ_TX)                     \
                ( sizeof(HOSTRQ_TX))

#define SIZEOF_CARDRSP_TX(CARDRSP_TX)                   \
                ( sizeof(CARDRSP_TX)) 

/*****************************************************************************
 *        Rx
 *****************************************************************************/

/*
 * RDS ring mapping to producer crbs
 */

/* Each ring has a unique crb */
#define NX_HOST_RDS_CRB_MODE_UNIQUE    0        /* <= LEGACY */

/* All configured RDS Rings share common crb:
     1 Ring  - same as unique
     2 Rings - 16, 16
     3 Rings - 10, 10, 10 */
#define NX_HOST_RDS_CRB_MODE_SHARED    1

/* Bit usage is specified per-ring using the
   ring's size. Sum of bit lengths must be <= 32. 
   Packing is [Ring N] ... [Ring 1][Ring 0] */
#define NX_HOST_RDS_CRB_MODE_CUSTOM    2
#define NX_HOST_RDS_CRB_MODE_MAX       3


/*
 * RDS Ting Types 
 */

#define NX_RDS_RING_TYPE_NORMAL       0
#define NX_RDS_RING_TYPE_JUMBO        1
#define NX_RDS_RING_TYPE_LRO          2
#define NX_RDS_RING_TYPE_MAX          3

/*
 * Components of the host-request for Rx context creation.
 * CRB - DOES NOT REQUIRE Rx/TX CONTEXT 
 */

typedef struct nx_hostrq_sds_ring_s {
        U64 host_phys_addr;     /* Ring base addr */
        U32 ring_size;          /* Ring entries */
        U16 msi_index;
        U16 rsvd;               /* Padding */
} nx_hostrq_sds_ring_t;

typedef struct nx_hostrq_rds_ring_s {
        U64 host_phys_addr;     /* Ring base addr */
        U64 buff_size;          /* Packet buffer size */
        U32 ring_size;          /* Ring entries */
        U32 ring_kind;          /* Class of ring */
} nx_hostrq_rds_ring_t;

typedef struct nx_hostrq_rx_ctx_s {
        U64 host_rsp_dma_addr;  /* Response dma'd here */
        U32 capabilities[4];    /* Flag bit vector */
        U32 host_int_crb_mode;  /* Interrupt crb usage */
        U32 host_rds_crb_mode;  /* RDS crb usage */
        /* These ring offsets are relative to data[0] below */
        U32 rds_ring_offset;    /* Offset to RDS config */
        U32 sds_ring_offset;    /* Offset to SDS config */
        U16 num_rds_rings;      /* Count of RDS rings */
        U16 num_sds_rings;      /* Count of SDS rings */
        U16 rsvd1;              /* Padding */
        U16 rsvd2;              /* Padding */
        U8  reserved[128];      /* reserve space for future expansion*/
        /* MUST BE 64-bit aligned.
           The following is packed:
           - N hostrq_rds_rings
           - N hostrq_sds_rings */
        char data[0];
} nx_hostrq_rx_ctx_t;

typedef struct nx_cardrsp_rds_ring_s {
        U32 host_producer_crb;  /* Crb to use */
        U32 rsvd1;              /* Padding */
} nx_cardrsp_rds_ring_t;

typedef struct nx_cardrsp_sds_ring_s {
        U32 host_consumer_crb;  /* Crb to use */
        U32 interrupt_crb;      /* Crb to use */
} nx_cardrsp_sds_ring_t;

typedef struct nx_cardrsp_rx_ctx_s {
        /* These ring offsets are relative to data[0] below */
        U32 rds_ring_offset;    /* Offset to RDS config */
        U32 sds_ring_offset;    /* Offset to SDS config */
        U32 host_ctx_state;     /* Starting State */
        U32 num_fn_per_port;    /* How many PCI fn share the port */
        U16 num_rds_rings;      /* Count of RDS rings */
        U16 num_sds_rings;      /* Count of SDS rings */
        U16 context_id;         /* Handle for context */
        U8  phys_port;          /* Physical id of port */
        U8  virt_port;          /* Virtual/Logical id of port */
        U8  reserved[128];      /* save space for future expansion */
        /*  MUST BE 64-bit aligned.
           The following is packed:
           - N cardrsp_rds_rings
           - N cardrs_sds_rings */
        char data[0];
} nx_cardrsp_rx_ctx_t;

#define SIZEOF_HOSTRQ_RX(HOSTRQ_RX, rds_rings, sds_rings)       \
        ( sizeof(HOSTRQ_RX) +                                   \
        (rds_rings)*(sizeof (nx_hostrq_rds_ring_t)) +           \
        (sds_rings)*(sizeof (nx_hostrq_sds_ring_t)) )

#define SIZEOF_CARDRSP_RX(CARDRSP_RX, rds_rings, sds_rings)     \
        ( sizeof(CARDRSP_RX) +                                  \
        (rds_rings)*(sizeof (nx_cardrsp_rds_ring_t)) +          \
        (sds_rings)*(sizeof (nx_cardrsp_sds_ring_t)) )


/*****************************************************************************
 *        Statistics
 *****************************************************************************/

/*
 * The model of statistics update to use 
 */

#define NX_STATISTICS_MODE_INVALID       0

/* Permanent setup; Updates are only sent on explicit request 
   (NX_CDRP_CMD_GET_STATISTICS) */
#define NX_STATISTICS_MODE_PULL          1

/* Permanent setup; Updates are sent automatically and on 
   explicit request (NX_CDRP_CMD_GET_STATISTICS) */
#define NX_STATISTICS_MODE_PUSH          2

/* One time stat update. */
#define NX_STATISTICS_MODE_SINGLE_SHOT   3

#define NX_STATISTICS_MODE_MAX           4

/*
 * What set of stats 
 */
#define NX_STATISTICS_TYPE_INVALID       0
#define NX_STATISTICS_TYPE_NIC_RX_CORE   1
#define NX_STATISTICS_TYPE_NIC_TX_CORE   2
#define NX_STATISTICS_TYPE_NIC_RX_ALL    3
#define NX_STATISTICS_TYPE_NIC_TX_ALL    4
#define NX_STATISTICS_TYPE_MAX           5


/*
 * Request to setup statistics gathering.
 * CRB - DOES NOT REQUIRE Rx/TX CONTEXT 
 */

typedef struct nx_hostrq_stat_setup_s {
        U64 host_stat_buffer;   /* Where to dma stats */
        U32 host_stat_size;     /* Size of stat buffer */
        U16 context_id;         /* Which context */
        U16 stat_type;          /* What class of stats */
        U16 stat_mode;          /* When to update */
        U16 stat_interval;      /* Frequency of update */
} nx_hostrq_stat_setup_t;



#endif /* _NXHAL_NIC_INTERFACE_H_ */