/*
* Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __GRU_INSTRUCTIONS_H__
#define __GRU_INSTRUCTIONS_H__
extern int gru_check_status_proc(void *cb);
extern int gru_wait_proc(void *cb);
extern void gru_wait_abort_proc(void *cb);
/*
* Architecture dependent functions
*/
#if defined(CONFIG_IA64)
#include <linux/compiler.h>
#include <asm/intrinsics.h>
#define __flush_cache(p) ia64_fc((unsigned long)p)
/* Use volatile on IA64 to ensure ordering via st4.rel */
#define gru_ordered_store_int(p, v) \
do { \
barrier(); \
*((volatile int *)(p)) = v; /* force st.rel */ \
} while (0)
#elif defined(CONFIG_X86_64)
#define __flush_cache(p) clflush(p)
#define gru_ordered_store_int(p, v) \
do { \
barrier(); \
*(int *)p = v; \
} while (0)
#else
#error "Unsupported architecture"
#endif
/*
* Control block status and exception codes
*/
#define CBS_IDLE 0
#define CBS_EXCEPTION 1
#define CBS_ACTIVE 2
#define CBS_CALL_OS 3
/* CB substatus bitmasks */
#define CBSS_MSG_QUEUE_MASK 7
#define CBSS_IMPLICIT_ABORT_ACTIVE_MASK 8
/* CB substatus message queue values (low 3 bits of substatus) */
#define CBSS_NO_ERROR 0
#define CBSS_LB_OVERFLOWED 1
#define CBSS_QLIMIT_REACHED 2
#define CBSS_PAGE_OVERFLOW 3
#define CBSS_AMO_NACKED 4
#define CBSS_PUT_NACKED 5
/*
* Structure used to fetch exception detail for CBs that terminate with
* CBS_EXCEPTION
*/
struct control_block_extended_exc_detail {
unsigned long cb;
int opc;
int ecause;
int exopc;
long exceptdet0;
int exceptdet1;
};
/*
* Instruction formats
*/
/*
* Generic instruction format.
* This definition has precise bit field definitions.
*/
struct gru_instruction_bits {
/* DW 0 - low */
unsigned int icmd: 1;
unsigned char ima: 3; /* CB_DelRep, unmapped mode */
unsigned char reserved0: 4;
unsigned int xtype: 3;
unsigned int iaa0: 2;
unsigned int iaa1: 2;
unsigned char reserved1: 1;
unsigned char opc: 8; /* opcode */
unsigned char exopc: 8; /* extended opcode */
/* DW 0 - high */
unsigned int idef2: 22; /* TRi0 */
unsigned char reserved2: 2;
unsigned char istatus: 2;
unsigned char isubstatus:4;
unsigned char reserved3: 2;
/* DW 1 */
unsigned long idef4; /* 42 bits: TRi1, BufSize */
/* DW 2-6 */
unsigned long idef1; /* BAddr0 */
unsigned long idef5; /* Nelem */
unsigned long idef6; /* Stride, Operand1 */
unsigned long idef3; /* BAddr1, Value, Operand2 */
unsigned long reserved4;
/* DW 7 */
unsigned long avalue; /* AValue */
};
/*
* Generic instruction with friendlier names. This format is used
* for inline instructions.
*/
struct gru_instruction {
/* DW 0 */
unsigned int op32; /* icmd,xtype,iaa0,ima,opc */
unsigned int tri0;
unsigned long tri1_bufsize; /* DW 1 */
unsigned long baddr0; /* DW 2 */
unsigned long nelem; /* DW 3 */
unsigned long op1_stride; /* DW 4 */
unsigned long op2_value_baddr1; /* DW 5 */
unsigned long reserved0; /* DW 6 */
unsigned long avalue; /* DW 7 */
};
/* Some shifts and masks for the low 32 bits of a GRU command */
#define GRU_CB_ICMD_SHFT 0
#define GRU_CB_ICMD_MASK 0x1
#define GRU_CB_XTYPE_SHFT 8
#define GRU_CB_XTYPE_MASK 0x7
#define GRU_CB_IAA0_SHFT 11
#define GRU_CB_IAA0_MASK 0x3
#define GRU_CB_IAA1_SHFT 13
#define GRU_CB_IAA1_MASK 0x3
#define GRU_CB_IMA_SHFT 1
#define GRU_CB_IMA_MASK 0x3
#define GRU_CB_OPC_SHFT 16
#define GRU_CB_OPC_MASK 0xff
#define GRU_CB_EXOPC_SHFT 24
#define GRU_CB_EXOPC_MASK 0xff
/* GRU instruction opcodes (opc field) */
#define OP_NOP 0x00
#define OP_BCOPY 0x01
#define OP_VLOAD 0x02
#define OP_IVLOAD 0x03
#define OP_VSTORE 0x04
#define OP_IVSTORE 0x05
#define OP_VSET 0x06
#define OP_IVSET 0x07
#define OP_MESQ 0x08
#define OP_GAMXR 0x09
#define OP_GAMIR 0x0a
#define OP_GAMIRR 0x0b
#define OP_GAMER 0x0c
#define OP_GAMERR 0x0d
#define OP_BSTORE 0x0e
#define OP_VFLUSH 0x0f
/* Extended opcodes values (exopc field) */
/* GAMIR - AMOs with implicit operands */
#define EOP_IR_FETCH 0x01 /* Plain fetch of memory */
#define EOP_IR_CLR 0x02 /* Fetch and clear */
#define EOP_IR_INC 0x05 /* Fetch and increment */
#define EOP_IR_DEC 0x07 /* Fetch and decrement */
#define EOP_IR_QCHK1 0x0d /* Queue check, 64 byte msg */
#define EOP_IR_QCHK2 0x0e /* Queue check, 128 byte msg */
/* GAMIRR - Registered AMOs with implicit operands */
#define EOP_IRR_FETCH 0x01 /* Registered fetch of memory */
#define EOP_IRR_CLR 0x02 /* Registered fetch and clear */
#define EOP_IRR_INC 0x05 /* Registered fetch and increment */
#define EOP_IRR_DEC 0x07 /* Registered fetch and decrement */
#define EOP_IRR_DECZ 0x0f /* Registered fetch and decrement, update on zero*/
/* GAMER - AMOs with explicit operands */
#define EOP_ER_SWAP 0x00 /* Exchange argument and memory */
#define EOP_ER_OR 0x01 /* Logical OR with memory */
#define EOP_ER_AND 0x02 /* Logical AND with memory */
#define EOP_ER_XOR 0x03 /* Logical XOR with memory */
#define EOP_ER_ADD 0x04 /* Add value to memory */
#define EOP_ER_CSWAP 0x08 /* Compare with operand2, write operand1 if match*/
#define EOP_ER_CADD 0x0c /* Queue check, operand1*64 byte msg */
/* GAMERR - Registered AMOs with explicit operands */
#define EOP_ERR_SWAP 0x00 /* Exchange argument and memory */
#define EOP_ERR_OR 0x01 /* Logical OR with memory */
#define EOP_ERR_AND 0x02 /* Logical AND with memory */
#define EOP_ERR_XOR 0x03 /* Logical XOR with memory */
#define EOP_ERR_ADD 0x04 /* Add value to memory */
#define EOP_ERR_CSWAP 0x08 /* Compare with operand2, write operand1 if match*/
#define EOP_ERR_EPOLL 0x09 /* Poll for equality */
#define EOP_ERR_NPOLL 0x0a /* Poll for inequality */
/* GAMXR - SGI Arithmetic unit */
#define EOP_XR_CSWAP 0x0b /* Masked compare exchange */
/* Transfer types (xtype field) */
#define XTYPE_B 0x0 /* byte */
#define XTYPE_S 0x1 /* short (2-byte) */
#define XTYPE_W 0x2 /* word (4-byte) */
#define XTYPE_DW 0x3 /* doubleword (8-byte) */
#define XTYPE_CL 0x6 /* cacheline (64-byte) */
/* Instruction access attributes (iaa0, iaa1 fields) */
#define IAA_RAM 0x0 /* normal cached RAM access */
#define IAA_NCRAM 0x2 /* noncoherent RAM access */
#define IAA_MMIO 0x1 /* noncoherent memory-mapped I/O space */
#define IAA_REGISTER 0x3 /* memory-mapped registers, etc. */
/* Instruction mode attributes (ima field) */
#define IMA_MAPPED 0x0 /* Virtual mode */
#define IMA_CB_DELAY 0x1 /* hold read responses until status changes */
#define IMA_UNMAPPED 0x2 /* bypass the TLBs (OS only) */
#define IMA_INTERRUPT 0x4 /* Interrupt when instruction completes */
/* CBE ecause bits */
#define CBE_CAUSE_RI (1 << 0)
#define CBE_CAUSE_INVALID_INSTRUCTION (1 << 1)
#define CBE_CAUSE_UNMAPPED_MODE_FORBIDDEN (1 << 2)
#define CBE_CAUSE_PE_CHECK_DATA_ERROR (1 << 3)
#define CBE_CAUSE_IAA_GAA_MISMATCH (1 << 4)
#define CBE_CAUSE_DATA_SEGMENT_LIMIT_EXCEPTION (1 << 5)
#define CBE_CAUSE_OS_FATAL_TLB_FAULT (1 << 6)
#define CBE_CAUSE_EXECUTION_HW_ERROR (1 << 7)
#define CBE_CAUSE_TLBHW_ERROR (1 << 8)
#define CBE_CAUSE_RA_REQUEST_TIMEOUT (1 << 9)
#define CBE_CAUSE_HA_REQUEST_TIMEOUT (1 << 10)
#define CBE_CAUSE_RA_RESPONSE_FATAL (1 << 11)
#define CBE_CAUSE_RA_RESPONSE_NON_FATAL (1 << 12)
#define CBE_CAUSE_HA_RESPONSE_FATAL (1 << 13)
#define CBE_CAUSE_HA_RESPONSE_NON_FATAL (1 << 14)
#define CBE_CAUSE_ADDRESS_SPACE_DECODE_ERROR (1 << 15)
#define CBE_CAUSE_RESPONSE_DATA_ERROR (1 << 16)
#define CBE_CAUSE_PROTOCOL_STATE_DATA_ERROR (1 << 17)
/*
* Exceptions are retried for the following cases. If any OTHER bits are set
* in ecause, the exception is not retryable.
*/
#define EXCEPTION_RETRY_BITS (CBE_CAUSE_RESPONSE_DATA_ERROR | \
CBE_CAUSE_RA_REQUEST_TIMEOUT | \
CBE_CAUSE_TLBHW_ERROR | \
CBE_CAUSE_HA_REQUEST_TIMEOUT)
/* Message queue head structure */
union gru_mesqhead {
unsigned long val;
struct {
unsigned int head;
unsigned int limit;
};
};
/* Generate the low word of a GRU instruction */
static inline unsigned int
__opword(unsigned char opcode, unsigned char exopc, unsigned char xtype,
unsigned char iaa0, unsigned char iaa1,
unsigned char ima)
{
return (1 << GRU_CB_ICMD_SHFT) |
(iaa0 << GRU_CB_IAA0_SHFT) |
(iaa1 << GRU_CB_IAA1_SHFT) |
(ima << GRU_CB_IMA_SHFT) |
(xtype << GRU_CB_XTYPE_SHFT) |
(opcode << GRU_CB_OPC_SHFT) |
(exopc << GRU_CB_EXOPC_SHFT);
}
/*
* Architecture specific intrinsics
*/
static inline void gru_flush_cache(void *p)
{
__flush_cache(p);
}
/*
* Store the lower 32 bits of the command including the "start" bit. Then
* start the instruction executing.
*/
static inline void gru_start_instruction(struct gru_instruction *ins, int op32)
{
gru_ordered_store_int(ins, op32);
gru_flush_cache(ins);
}
/* Convert "hints" to IMA */
#define CB_IMA(h) ((h) | IMA_UNMAPPED)
/* Convert data segment cache line index into TRI0 / TRI1 value */
#define GRU_DINDEX(i) ((i) * GRU_CACHE_LINE_BYTES)
/* Inline functions for GRU instructions.
* Note:
* - nelem and stride are in elements
* - tri0/tri1 is in bytes for the beginning of the data segment.
*/
static inline void gru_vload(void *cb, unsigned long mem_addr,
unsigned int tri0, unsigned char xtype, unsigned long nelem,
unsigned long stride, unsigned long hints)
{
struct gru_instruction *ins = (struct gru_instruction *)cb;
ins->baddr0 = (long)mem_addr;
ins->nelem = nelem;
ins->tri0 = tri0;
ins->op1_stride = stride;
gru_start_instruction(ins, __opword(OP_VLOAD, 0, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_vstore(void *cb, unsigned long mem_addr,
unsigned int tri0, unsigned char xtype, unsigned long nelem,
unsigned long stride, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)mem_addr;
ins->nelem = nelem;
ins->tri0 = tri0;
ins->op1_stride = stride;
gru_start_instruction(ins, __opword(OP_VSTORE, 0, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_ivload(void *cb, unsigned long mem_addr,
unsigned int tri0, unsigned int tri1, unsigned char xtype,
unsigned long nelem, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)mem_addr;
ins->nelem = nelem;
ins->tri0 = tri0;
ins->tri1_bufsize = tri1;
gru_start_instruction(ins, __opword(OP_IVLOAD, 0, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_ivstore(void *cb, unsigned long mem_addr,
unsigned int tri0, unsigned int tri1,
unsigned char xtype, unsigned long nelem, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)mem_addr;
ins->nelem = nelem;
ins->tri0 = tri0;
ins->tri1_bufsize = tri1;
gru_start_instruction(ins, __opword(OP_IVSTORE, 0, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_vset(void *cb, unsigned long mem_addr,
unsigned long value, unsigned char xtype, unsigned long nelem,
unsigned long stride, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)mem_addr;
ins->op2_value_baddr1 = value;
ins->nelem = nelem;
ins->op1_stride = stride;
gru_start_instruction(ins, __opword(OP_VSET, 0, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_ivset(void *cb, unsigned long mem_addr,
unsigned int tri1, unsigned long value, unsigned char xtype,
unsigned long nelem, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)mem_addr;
ins->op2_value_baddr1 = value;
ins->nelem = nelem;
ins->tri1_bufsize = tri1;
gru_start_instruction(ins, __opword(OP_IVSET, 0, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_vflush(void *cb, unsigned long mem_addr,
unsigned long nelem, unsigned char xtype, unsigned long stride,
unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)mem_addr;
ins->op1_stride = stride;
ins->nelem = nelem;
gru_start_instruction(ins, __opword(OP_VFLUSH, 0, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_nop(void *cb, int hints)
{
struct gru_instruction *ins = (void *)cb;
gru_start_instruction(ins, __opword(OP_NOP, 0, 0, 0, 0, CB_IMA(hints)));
}
static inline void gru_bcopy(void *cb, const unsigned long src,
unsigned long dest,
unsigned int tri0, unsigned int xtype, unsigned long nelem,
unsigned int bufsize, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)src;
ins->op2_value_baddr1 = (long)dest;
ins->nelem = nelem;
ins->tri0 = tri0;
ins->tri1_bufsize = bufsize;
gru_start_instruction(ins, __opword(OP_BCOPY, 0, xtype, IAA_RAM,
IAA_RAM, CB_IMA(hints)));
}
static inline void gru_bstore(void *cb, const unsigned long src,
unsigned long dest, unsigned int tri0, unsigned int xtype,
unsigned long nelem, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)src;
ins->op2_value_baddr1 = (long)dest;
ins->nelem = nelem;
ins->tri0 = tri0;
gru_start_instruction(ins, __opword(OP_BSTORE, 0, xtype, 0, IAA_RAM,
CB_IMA(hints)));
}
static inline void gru_gamir(void *cb, int exopc, unsigned long src,
unsigned int xtype, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)src;
gru_start_instruction(ins, __opword(OP_GAMIR, exopc, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_gamirr(void *cb, int exopc, unsigned long src,
unsigned int xtype, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)src;
gru_start_instruction(ins, __opword(OP_GAMIRR, exopc, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_gamer(void *cb, int exopc, unsigned long src,
unsigned int xtype,
unsigned long operand1, unsigned long operand2,
unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)src;
ins->op1_stride = operand1;
ins->op2_value_baddr1 = operand2;
gru_start_instruction(ins, __opword(OP_GAMER, exopc, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_gamerr(void *cb, int exopc, unsigned long src,
unsigned int xtype, unsigned long operand1,
unsigned long operand2, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)src;
ins->op1_stride = operand1;
ins->op2_value_baddr1 = operand2;
gru_start_instruction(ins, __opword(OP_GAMERR, exopc, xtype, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline void gru_gamxr(void *cb, unsigned long src,
unsigned int tri0, unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)src;
ins->nelem = 4;
gru_start_instruction(ins, __opword(OP_GAMXR, EOP_XR_CSWAP, XTYPE_DW,
IAA_RAM, 0, CB_IMA(hints)));
}
static inline void gru_mesq(void *cb, unsigned long queue,
unsigned long tri0, unsigned long nelem,
unsigned long hints)
{
struct gru_instruction *ins = (void *)cb;
ins->baddr0 = (long)queue;
ins->nelem = nelem;
ins->tri0 = tri0;
gru_start_instruction(ins, __opword(OP_MESQ, 0, XTYPE_CL, IAA_RAM, 0,
CB_IMA(hints)));
}
static inline unsigned long gru_get_amo_value(void *cb)
{
struct gru_instruction *ins = (void *)cb;
return ins->avalue;
}
static inline int gru_get_amo_value_head(void *cb)
{
struct gru_instruction *ins = (void *)cb;
return ins->avalue & 0xffffffff;
}
static inline int gru_get_amo_value_limit(void *cb)
{
struct gru_instruction *ins = (void *)cb;
return ins->avalue >> 32;
}
static inline union gru_mesqhead gru_mesq_head(int head, int limit)
{
union gru_mesqhead mqh;
mqh.head = head;
mqh.limit = limit;
return mqh;
}
/*
* Get struct control_block_extended_exc_detail for CB.
*/
extern int gru_get_cb_exception_detail(void *cb,
struct control_block_extended_exc_detail *excdet);
#define GRU_EXC_STR_SIZE 256
/*
* Control block definition for checking status
*/
struct gru_control_block_status {
unsigned int icmd :1;
unsigned int ima :3;
unsigned int reserved0 :4;
unsigned int unused1 :24;
unsigned int unused2 :24;
unsigned int istatus :2;
unsigned int isubstatus :4;
unsigned int unused3 :2;
};
/* Get CB status */
static inline int gru_get_cb_status(void *cb)
{
struct gru_control_block_status *cbs = (void *)cb;
return cbs->istatus;
}
/* Get CB message queue substatus */
static inline int gru_get_cb_message_queue_substatus(void *cb)
{
struct gru_control_block_status *cbs = (void *)cb;
return cbs->isubstatus & CBSS_MSG_QUEUE_MASK;
}
/* Get CB substatus */
static inline int gru_get_cb_substatus(void *cb)
{
struct gru_control_block_status *cbs = (void *)cb;
return cbs->isubstatus;
}
/* Check the status of a CB. If the CB is in UPM mode, call the
* OS to handle the UPM status.
* Returns the CB status field value (0 for normal completion)
*/
static inline int gru_check_status(void *cb)
{
struct gru_control_block_status *cbs = (void *)cb;
int ret;
ret = cbs->istatus;
if (ret == CBS_CALL_OS)
ret = gru_check_status_proc(cb);
return ret;
}
/* Wait for CB to complete.
* Returns the CB status field value (0 for normal completion)
*/
static inline int gru_wait(void *cb)
{
struct gru_control_block_status *cbs = (void *)cb;
int ret = cbs->istatus;
if (ret != CBS_IDLE)
ret = gru_wait_proc(cb);
return ret;
}
/* Wait for CB to complete. Aborts program if error. (Note: error does NOT
* mean TLB mis - only fatal errors such as memory parity error or user
* bugs will cause termination.
*/
static inline void gru_wait_abort(void *cb)
{
struct gru_control_block_status *cbs = (void *)cb;
if (cbs->istatus != CBS_IDLE)
gru_wait_abort_proc(cb);
}
/*
* Get a pointer to a control block
* gseg - GSeg address returned from gru_get_thread_gru_segment()
* index - index of desired CB
*/
static inline void *gru_get_cb_pointer(void *gseg,
int index)
{
return gseg + GRU_CB_BASE + index * GRU_HANDLE_STRIDE;
}
/*
* Get a pointer to a cacheline in the data segment portion of a GSeg
* gseg - GSeg address returned from gru_get_thread_gru_segment()
* index - index of desired cache line
*/
static inline void *gru_get_data_pointer(void *gseg, int index)
{
return gseg + GRU_DS_BASE + index * GRU_CACHE_LINE_BYTES;
}
/*
* Convert a vaddr into the tri index within the GSEG
* vaddr - virtual address of within gseg
*/
static inline int gru_get_tri(void *vaddr)
{
return ((unsigned long)vaddr & (GRU_GSEG_PAGESIZE - 1)) - GRU_DS_BASE;
}
#endif /* __GRU_INSTRUCTIONS_H__ */
