xref: /illumos-gate/usr/src/uts/common/io/bnxe/577xx/drivers/common/lm/device/bd_chain_st.h (revision d14abf155341d55053c76eeec58b787a456b753b)
1 
2 /*******************************************************************************
3 * bd_chain.h - bd chain interface
4 *******************************************************************************/
5 #ifndef _BD_CHAIN_ST_H
6 #define _BD_CHAIN_ST_H
7 
8 #include "lm_defs.h"
9 
10 typedef struct _lm_bd_chain_next {
11 	u32_t addr_lo /* Single continuous buffer low pointer */;
12 	u32_t addr_hi /* Single continuous buffer high pointer */;
13 	u8_t reserved[8] /* keeps same size as other eth tx bd types */;
14 } lm_bd_chain_next ;
15 
16 
17 typedef struct _lm_bd_chain_t
18 {
19     void          *bd_chain_virt;      /* virt addr of first page of the chain */
20     lm_address_t  bd_chain_phy;        /* phys addr of first page of the chain */
21     char          *next_bd;            /* pointer to next bd to produce or consume */
22     u16_t         page_cnt;            /* number of chain pages */
23     u16_t         capacity;            /* number of _usable_ bds (e.g. not including _next_ bds) */
24     u16_t         bd_left;             /* number of not produced, _usable_ bds */
25     u16_t         prod_idx;            /* index of next bd to produce (cyclic) */
26     u16_t         cons_idx;            /* index of next bd to consume (cyclic) */
27     u16_t         bds_per_page;        /* Number of bds per page */
28     u16_t         bds_per_page_mask;   /* Mask of number of bds per page */
29     u16_t         usable_bds_per_page; /* Number of usable bds in a page (taking into account last 16 bytes for 'next-ptr' */
30     u8_t          bd_size;             /* currently 8 and 16 bytes are supported. ("next_bd" is always 18 bytes) */
31     u8_t          bds_skip_eop;        /* num bds to skip at the end of the page due to the 'next pointer' */
32     u8_t          reserved[2];
33 
34     //PBL
35     void          *pbl_virt_addr_table;/* virt table pbl */
36     lm_address_t  *pbl_phys_addr_table;/* phys table pbl */
37     u16_t         pbe_idx;             /* index of the current pbe page */
38     u16_t         usable_bds_mask;     /* Mask used to check if end of page was reached */
39     u8_t          b_is_chain_mode;     /* indicate if using bd_chain interface or pbl interface */
40     u8_t          num_bd_to_sub;       /* Number of bds to subtract when checking if end of page was reached */
41     u8_t          reserved1[2];
42 } lm_bd_chain_t;
43 
44 
45 typedef struct _lm_hc_sb_info_t
46 {
47     u8_t hc_sb;
48     u8_t hc_index_value;
49     u16_t iro_dhc_offset;
50 } lm_hc_sb_info_t;
51 
52 
53 #endif /* _BD_CHAIN_ST_H */
54