mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 20:23:57 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
414 lines
14 KiB
C
414 lines
14 KiB
C
/*
|
|
* Intel 82586 IEEE 802.3 Ethernet LAN Coprocessor.
|
|
*
|
|
* See:
|
|
* Intel Microcommunications 1991
|
|
* p1-1 to p1-37
|
|
* Intel order No. 231658
|
|
* ISBN 1-55512-119-5
|
|
*
|
|
* Unfortunately, the above chapter mentions neither
|
|
* the System Configuration Pointer (SCP) nor the
|
|
* Intermediate System Configuration Pointer (ISCP),
|
|
* so we probably need to look elsewhere for the
|
|
* whole story -- some recommend the "Intel LAN
|
|
* Components manual" but I have neither a copy
|
|
* nor a full reference. But "elsewhere" may be
|
|
* in the same publication...
|
|
* The description of a later device, the
|
|
* "82596CA High-Performance 32-Bit Local Area Network
|
|
* Coprocessor", (ibid. p1-38 to p1-109) does mention
|
|
* the SCP and ISCP and also has an i82586 compatibility
|
|
* mode. Even more useful is "AP-235 An 82586 Data Link
|
|
* Driver" (ibid. p1-337 to p1-417).
|
|
*/
|
|
|
|
#define I82586_MEMZ (64 * 1024)
|
|
|
|
#define I82586_SCP_ADDR (I82586_MEMZ - sizeof(scp_t))
|
|
|
|
#define ADDR_LEN 6
|
|
#define I82586NULL 0xFFFF
|
|
|
|
#define toff(t,p,f) (unsigned short)((void *)(&((t *)((void *)0 + (p)))->f) - (void *)0)
|
|
|
|
/*
|
|
* System Configuration Pointer (SCP).
|
|
*/
|
|
typedef struct scp_t scp_t;
|
|
struct scp_t
|
|
{
|
|
unsigned short scp_sysbus; /* 82586 bus width: */
|
|
#define SCP_SY_16BBUS (0x0 << 0) /* 16 bits */
|
|
#define SCP_SY_8BBUS (0x1 << 0) /* 8 bits. */
|
|
unsigned short scp_junk[2]; /* Unused */
|
|
unsigned short scp_iscpl; /* lower 16 bits of ISCP_ADDR */
|
|
unsigned short scp_iscph; /* upper 16 bits of ISCP_ADDR */
|
|
};
|
|
|
|
/*
|
|
* Intermediate System Configuration Pointer (ISCP).
|
|
*/
|
|
typedef struct iscp_t iscp_t;
|
|
struct iscp_t
|
|
{
|
|
unsigned short iscp_busy; /* set by CPU before first CA, */
|
|
/* cleared by 82586 after read. */
|
|
unsigned short iscp_offset; /* offset of SCB */
|
|
unsigned short iscp_basel; /* base of SCB */
|
|
unsigned short iscp_baseh; /* " */
|
|
};
|
|
|
|
/*
|
|
* System Control Block (SCB).
|
|
* The 82586 writes its status to scb_status and then
|
|
* raises an interrupt to alert the CPU.
|
|
* The CPU writes a command to scb_command and
|
|
* then issues a Channel Attention (CA) to alert the 82586.
|
|
*/
|
|
typedef struct scb_t scb_t;
|
|
struct scb_t
|
|
{
|
|
unsigned short scb_status; /* Status of 82586 */
|
|
#define SCB_ST_INT (0xF << 12) /* Some of: */
|
|
#define SCB_ST_CX (0x1 << 15) /* Cmd completed */
|
|
#define SCB_ST_FR (0x1 << 14) /* Frame received */
|
|
#define SCB_ST_CNA (0x1 << 13) /* Cmd unit not active */
|
|
#define SCB_ST_RNR (0x1 << 12) /* Rcv unit not ready */
|
|
#define SCB_ST_JUNK0 (0x1 << 11) /* 0 */
|
|
#define SCB_ST_CUS (0x7 << 8) /* Cmd unit status */
|
|
#define SCB_ST_CUS_IDLE (0 << 8) /* Idle */
|
|
#define SCB_ST_CUS_SUSP (1 << 8) /* Suspended */
|
|
#define SCB_ST_CUS_ACTV (2 << 8) /* Active */
|
|
#define SCB_ST_JUNK1 (0x1 << 7) /* 0 */
|
|
#define SCB_ST_RUS (0x7 << 4) /* Rcv unit status */
|
|
#define SCB_ST_RUS_IDLE (0 << 4) /* Idle */
|
|
#define SCB_ST_RUS_SUSP (1 << 4) /* Suspended */
|
|
#define SCB_ST_RUS_NRES (2 << 4) /* No resources */
|
|
#define SCB_ST_RUS_RDY (4 << 4) /* Ready */
|
|
unsigned short scb_command; /* Next command */
|
|
#define SCB_CMD_ACK_CX (0x1 << 15) /* Ack cmd completion */
|
|
#define SCB_CMD_ACK_FR (0x1 << 14) /* Ack frame received */
|
|
#define SCB_CMD_ACK_CNA (0x1 << 13) /* Ack CU not active */
|
|
#define SCB_CMD_ACK_RNR (0x1 << 12) /* Ack RU not ready */
|
|
#define SCB_CMD_JUNKX (0x1 << 11) /* Unused */
|
|
#define SCB_CMD_CUC (0x7 << 8) /* Command Unit command */
|
|
#define SCB_CMD_CUC_NOP (0 << 8) /* Nop */
|
|
#define SCB_CMD_CUC_GO (1 << 8) /* Start cbl_offset */
|
|
#define SCB_CMD_CUC_RES (2 << 8) /* Resume execution */
|
|
#define SCB_CMD_CUC_SUS (3 << 8) /* Suspend " */
|
|
#define SCB_CMD_CUC_ABT (4 << 8) /* Abort " */
|
|
#define SCB_CMD_RESET (0x1 << 7) /* Reset chip (hardware) */
|
|
#define SCB_CMD_RUC (0x7 << 4) /* Receive Unit command */
|
|
#define SCB_CMD_RUC_NOP (0 << 4) /* Nop */
|
|
#define SCB_CMD_RUC_GO (1 << 4) /* Start rfa_offset */
|
|
#define SCB_CMD_RUC_RES (2 << 4) /* Resume reception */
|
|
#define SCB_CMD_RUC_SUS (3 << 4) /* Suspend " */
|
|
#define SCB_CMD_RUC_ABT (4 << 4) /* Abort " */
|
|
unsigned short scb_cbl_offset; /* Offset of first command unit */
|
|
/* Action Command */
|
|
unsigned short scb_rfa_offset; /* Offset of first Receive */
|
|
/* Frame Descriptor in the */
|
|
/* Receive Frame Area */
|
|
unsigned short scb_crcerrs; /* Properly aligned frames */
|
|
/* received with a CRC error */
|
|
unsigned short scb_alnerrs; /* Misaligned frames received */
|
|
/* with a CRC error */
|
|
unsigned short scb_rscerrs; /* Frames lost due to no space */
|
|
unsigned short scb_ovrnerrs; /* Frames lost due to slow bus */
|
|
};
|
|
|
|
#define scboff(p,f) toff(scb_t, p, f)
|
|
|
|
/*
|
|
* The eight Action Commands.
|
|
*/
|
|
typedef enum acmd_e acmd_e;
|
|
enum acmd_e
|
|
{
|
|
acmd_nop = 0, /* Do nothing */
|
|
acmd_ia_setup = 1, /* Load an (ethernet) address into the */
|
|
/* 82586 */
|
|
acmd_configure = 2, /* Update the 82586 operating parameters */
|
|
acmd_mc_setup = 3, /* Load a list of (ethernet) multicast */
|
|
/* addresses into the 82586 */
|
|
acmd_transmit = 4, /* Transmit a frame */
|
|
acmd_tdr = 5, /* Perform a Time Domain Reflectometer */
|
|
/* test on the serial link */
|
|
acmd_dump = 6, /* Copy 82586 registers to memory */
|
|
acmd_diagnose = 7, /* Run an internal self test */
|
|
};
|
|
|
|
/*
|
|
* Generic Action Command header.
|
|
*/
|
|
typedef struct ach_t ach_t;
|
|
struct ach_t
|
|
{
|
|
unsigned short ac_status; /* Command status: */
|
|
#define AC_SFLD_C (0x1 << 15) /* Command completed */
|
|
#define AC_SFLD_B (0x1 << 14) /* Busy executing */
|
|
#define AC_SFLD_OK (0x1 << 13) /* Completed error free */
|
|
#define AC_SFLD_A (0x1 << 12) /* Command aborted */
|
|
#define AC_SFLD_FAIL (0x1 << 11) /* Selftest failed */
|
|
#define AC_SFLD_S10 (0x1 << 10) /* No carrier sense */
|
|
/* during transmission */
|
|
#define AC_SFLD_S9 (0x1 << 9) /* Tx unsuccessful: */
|
|
/* (stopped) lost CTS */
|
|
#define AC_SFLD_S8 (0x1 << 8) /* Tx unsuccessful: */
|
|
/* (stopped) slow DMA */
|
|
#define AC_SFLD_S7 (0x1 << 7) /* Tx deferred: */
|
|
/* other link traffic */
|
|
#define AC_SFLD_S6 (0x1 << 6) /* Heart Beat: collision */
|
|
/* detect after last tx */
|
|
#define AC_SFLD_S5 (0x1 << 5) /* Tx stopped: */
|
|
/* excessive collisions */
|
|
#define AC_SFLD_MAXCOL (0xF << 0) /* Collision count */
|
|
unsigned short ac_command; /* Command specifier: */
|
|
#define AC_CFLD_EL (0x1 << 15) /* End of command list */
|
|
#define AC_CFLD_S (0x1 << 14) /* Suspend on completion */
|
|
#define AC_CFLD_I (0x1 << 13) /* Interrupt on completion */
|
|
#define AC_CFLD_CMD (0x7 << 0) /* acmd_e */
|
|
unsigned short ac_link; /* Next Action Command */
|
|
};
|
|
|
|
#define acoff(p,f) toff(ach_t, p, f)
|
|
|
|
/*
|
|
* The Nop Action Command.
|
|
*/
|
|
typedef struct ac_nop_t ac_nop_t;
|
|
struct ac_nop_t
|
|
{
|
|
ach_t nop_h;
|
|
};
|
|
|
|
/*
|
|
* The IA-Setup Action Command.
|
|
*/
|
|
typedef struct ac_ias_t ac_ias_t;
|
|
struct ac_ias_t
|
|
{
|
|
ach_t ias_h;
|
|
unsigned char ias_addr[ADDR_LEN]; /* The (ethernet) address */
|
|
};
|
|
|
|
/*
|
|
* The Configure Action Command.
|
|
*/
|
|
typedef struct ac_cfg_t ac_cfg_t;
|
|
struct ac_cfg_t
|
|
{
|
|
ach_t cfg_h;
|
|
unsigned char cfg_byte_cnt; /* Size foll data: 4-12 */
|
|
#define AC_CFG_BYTE_CNT(v) (((v) & 0xF) << 0)
|
|
unsigned char cfg_fifolim; /* FIFO threshold */
|
|
#define AC_CFG_FIFOLIM(v) (((v) & 0xF) << 0)
|
|
unsigned char cfg_byte8;
|
|
#define AC_CFG_SAV_BF(v) (((v) & 0x1) << 7) /* Save rxd bad frames */
|
|
#define AC_CFG_SRDY(v) (((v) & 0x1) << 6) /* SRDY/ARDY pin means */
|
|
/* external sync. */
|
|
unsigned char cfg_byte9;
|
|
#define AC_CFG_ELPBCK(v) (((v) & 0x1) << 7) /* External loopback */
|
|
#define AC_CFG_ILPBCK(v) (((v) & 0x1) << 6) /* Internal loopback */
|
|
#define AC_CFG_PRELEN(v) (((v) & 0x3) << 4) /* Preamble length */
|
|
#define AC_CFG_PLEN_2 0 /* 2 bytes */
|
|
#define AC_CFG_PLEN_4 1 /* 4 bytes */
|
|
#define AC_CFG_PLEN_8 2 /* 8 bytes */
|
|
#define AC_CFG_PLEN_16 3 /* 16 bytes */
|
|
#define AC_CFG_ALOC(v) (((v) & 0x1) << 3) /* Addr/len data is */
|
|
/* explicit in buffers */
|
|
#define AC_CFG_ADDRLEN(v) (((v) & 0x7) << 0) /* Bytes per address */
|
|
unsigned char cfg_byte10;
|
|
#define AC_CFG_BOFMET(v) (((v) & 0x1) << 7) /* Use alternate expo. */
|
|
/* backoff method */
|
|
#define AC_CFG_ACR(v) (((v) & 0x7) << 4) /* Accelerated cont. res. */
|
|
#define AC_CFG_LINPRIO(v) (((v) & 0x7) << 0) /* Linear priority */
|
|
unsigned char cfg_ifs; /* Interframe spacing */
|
|
unsigned char cfg_slotl; /* Slot time (low byte) */
|
|
unsigned char cfg_byte13;
|
|
#define AC_CFG_RETRYNUM(v) (((v) & 0xF) << 4) /* Max. collision retry */
|
|
#define AC_CFG_SLTTMHI(v) (((v) & 0x7) << 0) /* Slot time (high bits) */
|
|
unsigned char cfg_byte14;
|
|
#define AC_CFG_FLGPAD(v) (((v) & 0x1) << 7) /* Pad with HDLC flags */
|
|
#define AC_CFG_BTSTF(v) (((v) & 0x1) << 6) /* Do HDLC bitstuffing */
|
|
#define AC_CFG_CRC16(v) (((v) & 0x1) << 5) /* 16 bit CCITT CRC */
|
|
#define AC_CFG_NCRC(v) (((v) & 0x1) << 4) /* Insert no CRC */
|
|
#define AC_CFG_TNCRS(v) (((v) & 0x1) << 3) /* Tx even if no carrier */
|
|
#define AC_CFG_MANCH(v) (((v) & 0x1) << 2) /* Manchester coding */
|
|
#define AC_CFG_BCDIS(v) (((v) & 0x1) << 1) /* Disable broadcast */
|
|
#define AC_CFG_PRM(v) (((v) & 0x1) << 0) /* Promiscuous mode */
|
|
unsigned char cfg_byte15;
|
|
#define AC_CFG_ICDS(v) (((v) & 0x1) << 7) /* Internal collision */
|
|
/* detect source */
|
|
#define AC_CFG_CDTF(v) (((v) & 0x7) << 4) /* Collision detect */
|
|
/* filter in bit times */
|
|
#define AC_CFG_ICSS(v) (((v) & 0x1) << 3) /* Internal carrier */
|
|
/* sense source */
|
|
#define AC_CFG_CSTF(v) (((v) & 0x7) << 0) /* Carrier sense */
|
|
/* filter in bit times */
|
|
unsigned short cfg_min_frm_len;
|
|
#define AC_CFG_MNFRM(v) (((v) & 0xFF) << 0) /* Min. bytes/frame (<= 255) */
|
|
};
|
|
|
|
/*
|
|
* The MC-Setup Action Command.
|
|
*/
|
|
typedef struct ac_mcs_t ac_mcs_t;
|
|
struct ac_mcs_t
|
|
{
|
|
ach_t mcs_h;
|
|
unsigned short mcs_cnt; /* No. of bytes of MC addresses */
|
|
#if 0
|
|
unsigned char mcs_data[ADDR_LEN]; /* The first MC address .. */
|
|
...
|
|
#endif
|
|
};
|
|
|
|
#define I82586_MAX_MULTICAST_ADDRESSES 128 /* Hardware hashed filter */
|
|
|
|
/*
|
|
* The Transmit Action Command.
|
|
*/
|
|
typedef struct ac_tx_t ac_tx_t;
|
|
struct ac_tx_t
|
|
{
|
|
ach_t tx_h;
|
|
unsigned short tx_tbd_offset; /* Address of list of buffers. */
|
|
#if 0
|
|
Linux packets are passed down with the destination MAC address
|
|
and length/type field already prepended to the data,
|
|
so we do not need to insert it. Consistent with this
|
|
we must also set the AC_CFG_ALOC(..) flag during the
|
|
ac_cfg_t action command.
|
|
unsigned char tx_addr[ADDR_LEN]; /* The frame dest. address */
|
|
unsigned short tx_length; /* The frame length */
|
|
#endif /* 0 */
|
|
};
|
|
|
|
/*
|
|
* The Time Domain Reflectometer Action Command.
|
|
*/
|
|
typedef struct ac_tdr_t ac_tdr_t;
|
|
struct ac_tdr_t
|
|
{
|
|
ach_t tdr_h;
|
|
unsigned short tdr_result; /* Result. */
|
|
#define AC_TDR_LNK_OK (0x1 << 15) /* No link problem */
|
|
#define AC_TDR_XCVR_PRB (0x1 << 14) /* Txcvr cable problem */
|
|
#define AC_TDR_ET_OPN (0x1 << 13) /* Open on the link */
|
|
#define AC_TDR_ET_SRT (0x1 << 12) /* Short on the link */
|
|
#define AC_TDR_TIME (0x7FF << 0) /* Distance to problem */
|
|
/* site in transmit */
|
|
/* clock cycles */
|
|
};
|
|
|
|
/*
|
|
* The Dump Action Command.
|
|
*/
|
|
typedef struct ac_dmp_t ac_dmp_t;
|
|
struct ac_dmp_t
|
|
{
|
|
ach_t dmp_h;
|
|
unsigned short dmp_offset; /* Result. */
|
|
};
|
|
|
|
/*
|
|
* Size of the result of the dump command.
|
|
*/
|
|
#define DUMPBYTES 170
|
|
|
|
/*
|
|
* The Diagnose Action Command.
|
|
*/
|
|
typedef struct ac_dgn_t ac_dgn_t;
|
|
struct ac_dgn_t
|
|
{
|
|
ach_t dgn_h;
|
|
};
|
|
|
|
/*
|
|
* Transmit Buffer Descriptor (TBD).
|
|
*/
|
|
typedef struct tbd_t tbd_t;
|
|
struct tbd_t
|
|
{
|
|
unsigned short tbd_status; /* Written by the CPU */
|
|
#define TBD_STATUS_EOF (0x1 << 15) /* This TBD is the */
|
|
/* last for this frame */
|
|
#define TBD_STATUS_ACNT (0x3FFF << 0) /* Actual count of data */
|
|
/* bytes in this buffer */
|
|
unsigned short tbd_next_bd_offset; /* Next in list */
|
|
unsigned short tbd_bufl; /* Buffer address (low) */
|
|
unsigned short tbd_bufh; /* " " (high) */
|
|
};
|
|
|
|
/*
|
|
* Receive Buffer Descriptor (RBD).
|
|
*/
|
|
typedef struct rbd_t rbd_t;
|
|
struct rbd_t
|
|
{
|
|
unsigned short rbd_status; /* Written by the 82586 */
|
|
#define RBD_STATUS_EOF (0x1 << 15) /* This RBD is the */
|
|
/* last for this frame */
|
|
#define RBD_STATUS_F (0x1 << 14) /* ACNT field is valid */
|
|
#define RBD_STATUS_ACNT (0x3FFF << 0) /* Actual no. of data */
|
|
/* bytes in this buffer */
|
|
unsigned short rbd_next_rbd_offset; /* Next rbd in list */
|
|
unsigned short rbd_bufl; /* Data pointer (low) */
|
|
unsigned short rbd_bufh; /* " " (high) */
|
|
unsigned short rbd_el_size; /* EL+Data buf. size */
|
|
#define RBD_EL (0x1 << 15) /* This BD is the */
|
|
/* last in the list */
|
|
#define RBD_SIZE (0x3FFF << 0) /* No. of bytes the */
|
|
/* buffer can hold */
|
|
};
|
|
|
|
#define rbdoff(p,f) toff(rbd_t, p, f)
|
|
|
|
/*
|
|
* Frame Descriptor (FD).
|
|
*/
|
|
typedef struct fd_t fd_t;
|
|
struct fd_t
|
|
{
|
|
unsigned short fd_status; /* Written by the 82586 */
|
|
#define FD_STATUS_C (0x1 << 15) /* Completed storing frame */
|
|
#define FD_STATUS_B (0x1 << 14) /* FD was consumed by RU */
|
|
#define FD_STATUS_OK (0x1 << 13) /* Frame rxd successfully */
|
|
#define FD_STATUS_S11 (0x1 << 11) /* CRC error */
|
|
#define FD_STATUS_S10 (0x1 << 10) /* Alignment error */
|
|
#define FD_STATUS_S9 (0x1 << 9) /* Ran out of resources */
|
|
#define FD_STATUS_S8 (0x1 << 8) /* Rx DMA overrun */
|
|
#define FD_STATUS_S7 (0x1 << 7) /* Frame too short */
|
|
#define FD_STATUS_S6 (0x1 << 6) /* No EOF flag */
|
|
unsigned short fd_command; /* Command */
|
|
#define FD_COMMAND_EL (0x1 << 15) /* Last FD in list */
|
|
#define FD_COMMAND_S (0x1 << 14) /* Suspend RU after rx */
|
|
unsigned short fd_link_offset; /* Next FD */
|
|
unsigned short fd_rbd_offset; /* First RBD (data) */
|
|
/* Prepared by CPU, */
|
|
/* updated by 82586 */
|
|
#if 0
|
|
I think the rest is unused since we
|
|
have set AC_CFG_ALOC(..). However, just
|
|
in case, we leave the space.
|
|
#endif /* 0 */
|
|
unsigned char fd_dest[ADDR_LEN]; /* Destination address */
|
|
/* Written by 82586 */
|
|
unsigned char fd_src[ADDR_LEN]; /* Source address */
|
|
/* Written by 82586 */
|
|
unsigned short fd_length; /* Frame length or type */
|
|
/* Written by 82586 */
|
|
};
|
|
|
|
#define fdoff(p,f) toff(fd_t, p, f)
|
|
|
|
/*
|
|
* This software may only be used and distributed
|
|
* according to the terms of the GNU General Public License.
|
|
*
|
|
* For more details, see wavelan.c.
|
|
*/
|