FreeBSD/Linux Kernel Cross Reference
sys/contrib/ncsw/Peripherals/BM/fsl_bman.h

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    /******************************************************************************
     @File          fsl_bman.h
    
     @Description   BM header
    *//***************************************************************************/
    #ifndef __FSL_BMAN_H
    #define __FSL_BMAN_H
    
    #include "std_ext.h"
    
    
    /*************************************************/
    /*   BMan s/w corenet portal, low-level i/face   */
    /*************************************************/
    typedef enum {
        e_BmPortalPCI = 0,          /* PI index, cache-inhibited */
        e_BmPortalPCE,              /* PI index, cache-enabled */
        e_BmPortalPVB               /* valid-bit */
    } e_BmPortalProduceMode;
    
    typedef enum {
        e_BmPortalRcrCCI = 0,      /* CI index, cache-inhibited */
        e_BmPortalRcrCCE           /* CI index, cache-enabled */
    } e_BmPortalRcrConsumeMode;
    
    /* Portal constants */
    #define BM_RCR_SIZE        8
    
    /* Hardware constants */
    enum bm_isr_reg {
        bm_isr_status = 0,
        bm_isr_enable = 1,
        bm_isr_disable = 2,
        bm_isr_inhibit = 3
    };
    
    /* Represents s/w corenet portal mapped data structures */
    struct bm_rcr_entry;    /* RCR (Release Command Ring) entries */
    struct bm_mc_command;    /* MC (Management Command) command */
    struct bm_mc_result;    /* MC result */
    
    /* This type represents a s/w corenet portal space, and is used for creating the
     * portal objects within it (RCR, etc) */
    struct bm_portal;
    
    /* This wrapper represents a bit-array for the depletion state of the 64 Bman
     * buffer pools. */
    struct bman_depletion {
        uint32_t __state[2];
    };
    #define __bmdep_word(x) ((x) >> 5)
    #define __bmdep_shift(x) ((x) & 0x1f)
    #define __bmdep_bit(x) (0x80000000 >> __bmdep_shift(x))
    static __inline__ void bman_depletion_init(struct bman_depletion *c)
    {
        c->__state[0] = c->__state[1] = 0;
    }
    static __inline__ void bman_depletion_fill(struct bman_depletion *c)
    {
        c->__state[0] = c->__state[1] = (uint32_t)~0;
    }
    static __inline__ int bman_depletion_get(const struct bman_depletion *c, uint8_t bpid)
    {
        return (int)(c->__state[__bmdep_word(bpid)] & __bmdep_bit(bpid));
   }
   static __inline__ void bman_depletion_set(struct bman_depletion *c, uint8_t bpid)
   {
       c->__state[__bmdep_word(bpid)] |= __bmdep_bit(bpid);
   }
   static __inline__ void bman_depletion_unset(struct bman_depletion *c, uint8_t bpid)
   {
       c->__state[__bmdep_word(bpid)] &= ~__bmdep_bit(bpid);
   }
   
   /* ------------------------------ */
   /* --- Portal enumeration API --- */
   
   /* ------------------------------ */
   /* --- Buffer pool allocation --- */
   #define BM_POOL_THRESH_SW_ENTER 0
   #define BM_POOL_THRESH_SW_EXIT  1
   #define BM_POOL_THRESH_HW_ENTER 2
   #define BM_POOL_THRESH_HW_EXIT  3
   
   /* --------------- */
   /* --- RCR API --- */
   
   /* Create/destroy */
   t_Error bm_rcr_init(struct bm_portal *portal,
                       e_BmPortalProduceMode pmode,
                       e_BmPortalRcrConsumeMode cmode);
   void bm_rcr_finish(struct bm_portal *portal);
   
   /* Start/abort RCR entry */
   struct bm_rcr_entry *bm_rcr_start(struct bm_portal *portal);
   void bm_rcr_abort(struct bm_portal *portal);
   
   /* For PI modes only. This presumes a started but uncommitted RCR entry. If
    * there's no more room in the RCR, this function returns NULL. Otherwise it
    * returns the next RCR entry and increments an internal PI counter without
    * flushing it to h/w. */
   struct bm_rcr_entry *bm_rcr_pend_and_next(struct bm_portal *portal, uint8_t myverb);
   
   /* Commit RCR entries, including pending ones (aka "write PI") */
   void bm_rcr_pci_commit(struct bm_portal *portal, uint8_t myverb);
   void bm_rcr_pce_prefetch(struct bm_portal *portal);
   void bm_rcr_pce_commit(struct bm_portal *portal, uint8_t myverb);
   void bm_rcr_pvb_commit(struct bm_portal *portal, uint8_t myverb);
   
   /* Track h/w consumption. Returns non-zero if h/w had consumed previously
    * unconsumed RCR entries. */
   uint8_t bm_rcr_cci_update(struct bm_portal *portal);
   void bm_rcr_cce_prefetch(struct bm_portal *portal);
   uint8_t bm_rcr_cce_update(struct bm_portal *portal);
   /* Returns the number of available RCR entries */
   uint8_t bm_rcr_get_avail(struct bm_portal *portal);
   /* Returns the number of unconsumed RCR entries */
   uint8_t bm_rcr_get_fill(struct bm_portal *portal);
   
   /* Read/write the RCR interrupt threshold */
   uint8_t bm_rcr_get_ithresh(struct bm_portal *portal);
   void bm_rcr_set_ithresh(struct bm_portal *portal, uint8_t ithresh);
   
   
   /* ------------------------------ */
   /* --- Management command API --- */
   
   /* Create/destroy */
   t_Error bm_mc_init(struct bm_portal *portal);
   void bm_mc_finish(struct bm_portal *portal);
   
   /* Start/abort mgmt command */
   struct bm_mc_command *bm_mc_start(struct bm_portal *portal);
   void bm_mc_abort(struct bm_portal *portal);
   
   /* Writes 'verb' with appropriate 'vbit'. Invalidates and pre-fetches the
    * response. */
   void bm_mc_commit(struct bm_portal *portal, uint8_t myverb);
   
   /* Poll for result. If NULL, invalidates and prefetches for the next call. */
   struct bm_mc_result *bm_mc_result(struct bm_portal *portal);
   
   
   /* ------------------------------------- */
   /* --- Portal interrupt register API --- */
   
   /* For a quick explanation of the Bman interrupt model, see the comments in the
    * equivalent section of the qman_portal.h header.
    */
   
   /* Create/destroy */
   t_Error bm_isr_init(struct bm_portal *portal);
   void bm_isr_finish(struct bm_portal *portal);
   
   /* BSCN masking is a per-portal configuration */
   void bm_isr_bscn_mask(struct bm_portal *portal, uint8_t bpid, int enable);
   
   /* Used by all portal interrupt registers except 'inhibit' */
   #define BM_PIRQ_RCRI    0x00000002    /* RCR Ring (below threshold) */
   #define BM_PIRQ_BSCN    0x00000001    /* Buffer depletion State Change */
   
   /* These are bm_<reg>_<verb>(). So for example, bm_disable_write() means "write
    * the disable register" rather than "disable the ability to write". */
   #define bm_isr_status_read(bm)      __bm_isr_read(bm, bm_isr_status)
   #define bm_isr_status_clear(bm, m)  __bm_isr_write(bm, bm_isr_status, m)
   #define bm_isr_enable_read(bm)      __bm_isr_read(bm, bm_isr_enable)
   #define bm_isr_enable_write(bm, v)  __bm_isr_write(bm, bm_isr_enable, v)
   #define bm_isr_disable_read(bm)     __bm_isr_read(bm, bm_isr_disable)
   #define bm_isr_disable_write(bm, v) __bm_isr_write(bm, bm_isr_disable, v)
   #define bm_isr_inhibit(bm)          __bm_isr_write(bm, bm_isr_inhibit, 1)
   #define bm_isr_uninhibit(bm)        __bm_isr_write(bm, bm_isr_inhibit, 0)
   
   /* Don't use these, use the wrappers above*/
   uint32_t __bm_isr_read(struct bm_portal *portal, enum bm_isr_reg n);
   void __bm_isr_write(struct bm_portal *portal, enum bm_isr_reg n, uint32_t val);
   
   /* ------------------------------------------------------- */
   /* --- Bman data structures (and associated constants) --- */
   /* Code-reduction, define a wrapper for 48-bit buffers. In cases where a buffer
    * pool id specific to this buffer is needed (BM_RCR_VERB_CMD_BPID_MULTI,
    * BM_MCC_VERB_ACQUIRE), the 'bpid' field is used. */
   
   #define BM_RCR_VERB_VBIT                0x80
   #define BM_RCR_VERB_CMD_MASK            0x70    /* one of two values; */
   #define BM_RCR_VERB_CMD_BPID_SINGLE     0x20
   #define BM_RCR_VERB_CMD_BPID_MULTI      0x30
   #define BM_RCR_VERB_BUFCOUNT_MASK       0x0f    /* values 1..8 */
   
   #define BM_MCC_VERB_VBIT                0x80
   #define BM_MCC_VERB_CMD_MASK            0x70    /* where the verb contains; */
   #define BM_MCC_VERB_CMD_ACQUIRE         0x10
   #define BM_MCC_VERB_CMD_QUERY           0x40
   #define BM_MCC_VERB_ACQUIRE_BUFCOUNT    0x0f    /* values 1..8 go here */
   
   
   #if defined(__MWERKS__) && !defined(__GNUC__)
   #pragma pack(push,1)
   #endif /* defined(__MWERKS__) && ... */
   #define MEM_MAP_START
   
   _Packed struct bm_buffer {
       volatile uint8_t reserved1;
       volatile uint8_t bpid;
       volatile uint16_t hi;    /* High 16-bits of 48-bit address */
       volatile uint32_t lo;    /* Low 32-bits of 48-bit address */
   } _PackedType;
   
   /* See 1.5.3.5.4: "Release Command" */
   _Packed struct bm_rcr_entry {
       _Packed union {
           _Packed struct {
               volatile uint8_t __dont_write_directly__verb;
               volatile uint8_t bpid; /* used with BM_RCR_VERB_CMD_BPID_SINGLE */
               volatile uint8_t reserved1[62];
           } _PackedType;
           volatile struct bm_buffer bufs[8];
       } _PackedType;
   } _PackedType;
   
   /* See 1.5.3.1: "Acquire Command" */
   /* See 1.5.3.2: "Query Command" */
   _Packed struct bm_mc_command {
       volatile uint8_t __dont_write_directly__verb;
       _Packed union {
           _Packed struct bm_mcc_acquire {
               volatile uint8_t bpid;
               volatile uint8_t reserved1[62];
           } _PackedType acquire;
           _Packed struct bm_mcc_query {
               volatile uint8_t reserved1[63];
           } _PackedType query;
       } _PackedType;
   } _PackedType;
   
   /* See 1.5.3.3: "Acquire Reponse" */
   /* See 1.5.3.4: "Query Reponse" */
   _Packed struct bm_mc_result {
       _Packed union {
           _Packed struct {
               volatile uint8_t verb;
               volatile uint8_t reserved1[63];
           } _PackedType;
           _Packed union {
               _Packed struct {
                   volatile uint8_t reserved1;
                   volatile uint8_t bpid;
                   volatile uint8_t reserved2[62];
               } _PackedType;
               volatile struct bm_buffer bufs[8];
           } _PackedType acquire;
           _Packed struct {
               volatile uint8_t reserved1[32];
               /* "availability state" and "depletion state" */
               _Packed struct {
                   volatile uint8_t reserved1[8];
                   /* Access using bman_depletion_***() */
                   volatile struct bman_depletion state;
               } _PackedType as, ds;
           } _PackedType query;
       } _PackedType;
   } _PackedType;
   
   #define MEM_MAP_END
   #if defined(__MWERKS__) && !defined(__GNUC__)
   #pragma pack(pop)
   #endif /* defined(__MWERKS__) && ... */
   
   
   #define BM_MCR_VERB_VBIT                0x80
   #define BM_MCR_VERB_CMD_MASK            BM_MCC_VERB_CMD_MASK
   #define BM_MCR_VERB_CMD_ACQUIRE         BM_MCC_VERB_CMD_ACQUIRE
   #define BM_MCR_VERB_CMD_QUERY           BM_MCC_VERB_CMD_QUERY
   #define BM_MCR_VERB_CMD_ERR_INVALID     0x60
   #define BM_MCR_VERB_CMD_ERR_ECC         0x70
   #define BM_MCR_VERB_ACQUIRE_BUFCOUNT    BM_MCC_VERB_ACQUIRE_BUFCOUNT /* 0..8 */
   /* Determine the "availability state" of pool 'p' from a query result 'r' */
   #define BM_MCR_QUERY_AVAILABILITY(r,p) bman_depletion_get(&r->query.as.state,p)
   /* Determine the "depletion state" of pool 'p' from a query result 'r' */
   #define BM_MCR_QUERY_DEPLETION(r,p) bman_depletion_get(&r->query.ds.state,p)
   
   
   /* Portal and Buffer Pools */
   /* ----------------------- */
   
   /* Flags to bman_create_portal() */
   #define BMAN_PORTAL_FLAG_IRQ         0x00000001 /* use interrupt handler */
   #define BMAN_PORTAL_FLAG_IRQ_FAST    0x00000002 /* ... for fast-path too! */
   #define BMAN_PORTAL_FLAG_COMPACT     0x00000004 /* use compaction algorithm */
   #define BMAN_PORTAL_FLAG_RECOVER     0x00000008 /* recovery mode */
   #define BMAN_PORTAL_FLAG_WAIT        0x00000010 /* wait if RCR is full */
   #define BMAN_PORTAL_FLAG_WAIT_INT    0x00000020 /* if wait, interruptible? */
   #define BMAN_PORTAL_FLAG_CACHE       0x00000400 /* use cache-able area for rings */
   
   /* Flags to bman_new_pool() */
   #define BMAN_POOL_FLAG_NO_RELEASE    0x00000001 /* can't release to pool */
   #define BMAN_POOL_FLAG_ONLY_RELEASE  0x00000002 /* can only release to pool */
   #define BMAN_POOL_FLAG_DEPLETION     0x00000004 /* track depletion entry/exit */
   #define BMAN_POOL_FLAG_DYNAMIC_BPID  0x00000008 /* (de)allocate bpid */
   #define BMAN_POOL_FLAG_THRESH        0x00000010 /* set depletion thresholds */
   #define BMAN_POOL_FLAG_STOCKPILE     0x00000020 /* stockpile to reduce hw ops */
   
   /* Flags to bman_release() */
   #define BMAN_RELEASE_FLAG_WAIT       0x00000001 /* wait if RCR is full */
   #define BMAN_RELEASE_FLAG_WAIT_INT   0x00000002 /* if we wait, interruptible? */
   #define BMAN_RELEASE_FLAG_WAIT_SYNC  0x00000004 /* if wait, until consumed? */
   #define BMAN_RELEASE_FLAG_NOW        0x00000008 /* issue immediate release */
   
   /* Flags to bman_acquire() */
   #define BMAN_ACQUIRE_FLAG_STOCKPILE  0x00000001 /* no hw op, stockpile only */
   
   
   #endif /* __FSL_BMAN_H */

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