Commit a24e5e1c authored by Jack Steiner's avatar Jack Steiner Committed by Linus Torvalds
Browse files

sgi-gru: change GRU CCH commands from inline functions to outofline functions 



Change the GRU instructions that manage contexts from inline functions to
out-of-line functions.  This simplifies adding statistics & error checking
to these functions.

Signed-off-by: default avatarJack Steiner <steiner@sgi.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 43884604

drivers/misc/sgi-gru/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -3,5 +3,5 @@ ifdef CONFIG_SGI_GRU_DEBUG 
endif



obj-$(CONFIG_SGI_GRU) := gru.o

gru-y := grufile.o grumain.o grufault.o grutlbpurge.o gruprocfs.o grukservices.o

gru-y := grufile.o grumain.o grufault.o grutlbpurge.o gruprocfs.o grukservices.o gruhandles.o

drivers/misc/sgi-gru/gruhandles.c

0 → 100644
+197 −0
Original line number Diff line number Diff line 
/*

 *              GRU KERNEL MCS INSTRUCTIONS

 *

 *  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 General Public License as published by

 *  the Free Software Foundation; either version 2 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 General Public License for more details.

 *

 *  You should have received a copy of the GNU 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

 */



#include <linux/kernel.h>

#include "gru.h"

#include "grulib.h"

#include "grutables.h"



/* 10 sec */

#ifdef CONFIG_IA64

#include <asm/processor.h>

#define GRU_OPERATION_TIMEOUT	(((cycles_t) local_cpu_data->itc_freq)*10)

#else

#include <asm/tsc.h>

#define GRU_OPERATION_TIMEOUT	((cycles_t) tsc_khz*10*1000)

#endif



/* Extract the status field from a kernel handle */

#define GET_MSEG_HANDLE_STATUS(h)	(((*(unsigned long *)(h)) >> 16) & 3)



static void start_instruction(void *h)

{

	unsigned long *w0 = h;



	wmb();		/* setting CMD bit must be last */

	*w0 = *w0 | 1;

	gru_flush_cache(h);

}



static int wait_instruction_complete(void *h, enum mcs_op opc)

{

	int status;

	cycles_t start_time = get_cycles();



	while (1) {

		cpu_relax();

		status = GET_MSEG_HANDLE_STATUS(h);

		if (status != CCHSTATUS_ACTIVE)

			break;

		if (GRU_OPERATION_TIMEOUT < (get_cycles() - start_time))

			panic("GRU %p is malfunctioning\n", h);

	}

	return status;

}



#if defined CONFIG_IA64

static void cch_allocate_set_asids(

		  struct gru_context_configuration_handle *cch, int asidval)

{

	int i;



	for (i = 0; i < 8; i++) {

		cch->asid[i] = (asidval++);

#if 0

		/* ZZZ hugepages not supported yet */

		if (i == RGN_HPAGE)

			cch->sizeavail[i] = GRU_SIZEAVAIL(hpage_shift);

		else

#endif

			cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT);

	}

}

#elif defined CONFIG_X86_64

static void cch_allocate_set_asids(

		  struct gru_context_configuration_handle *cch, int asidval)

{

	int i;



	for (i = 0; i < 8; i++) {

		cch->asid[i] = asidval++;

		cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT) |

			GRU_SIZEAVAIL(21);

	}

}

#endif



int cch_allocate(struct gru_context_configuration_handle *cch,

			       int asidval, unsigned long cbrmap,

			       unsigned long dsrmap)

{

	cch_allocate_set_asids(cch, asidval);

	cch->dsr_allocation_map = dsrmap;

	cch->cbr_allocation_map = cbrmap;

	cch->opc = CCHOP_ALLOCATE;

	start_instruction(cch);

	return wait_instruction_complete(cch, cchop_allocate);

}



int cch_start(struct gru_context_configuration_handle *cch)

{

	cch->opc = CCHOP_START;

	start_instruction(cch);

	return wait_instruction_complete(cch, cchop_start);

}



int cch_interrupt(struct gru_context_configuration_handle *cch)

{

	cch->opc = CCHOP_INTERRUPT;

	start_instruction(cch);

	return wait_instruction_complete(cch, cchop_interrupt);

}



int cch_deallocate(struct gru_context_configuration_handle *cch)

{

	cch->opc = CCHOP_DEALLOCATE;

	start_instruction(cch);

	return wait_instruction_complete(cch, cchop_deallocate);

}



int cch_interrupt_sync(struct gru_context_configuration_handle

				     *cch)

{

	cch->opc = CCHOP_INTERRUPT_SYNC;

	start_instruction(cch);

	return wait_instruction_complete(cch, cchop_interrupt_sync);

}



int tgh_invalidate(struct gru_tlb_global_handle *tgh,

				 unsigned long vaddr, unsigned long vaddrmask,

				 int asid, int pagesize, int global, int n,

				 unsigned short ctxbitmap)

{

	tgh->vaddr = vaddr;

	tgh->asid = asid;

	tgh->pagesize = pagesize;

	tgh->n = n;

	tgh->global = global;

	tgh->vaddrmask = vaddrmask;

	tgh->ctxbitmap = ctxbitmap;

	tgh->opc = TGHOP_TLBINV;

	start_instruction(tgh);

	return wait_instruction_complete(tgh, tghop_invalidate);

}



void tfh_write_only(struct gru_tlb_fault_handle *tfh,

				  unsigned long pfn, unsigned long vaddr,

				  int asid, int dirty, int pagesize)

{

	tfh->fillasid = asid;

	tfh->fillvaddr = vaddr;

	tfh->pfn = pfn;

	tfh->dirty = dirty;

	tfh->pagesize = pagesize;

	tfh->opc = TFHOP_WRITE_ONLY;

	start_instruction(tfh);

}



void tfh_write_restart(struct gru_tlb_fault_handle *tfh,

				     unsigned long paddr, int gaa,

				     unsigned long vaddr, int asid, int dirty,

				     int pagesize)

{

	tfh->fillasid = asid;

	tfh->fillvaddr = vaddr;

	tfh->pfn = paddr >> GRU_PADDR_SHIFT;

	tfh->gaa = gaa;

	tfh->dirty = dirty;

	tfh->pagesize = pagesize;

	tfh->opc = TFHOP_WRITE_RESTART;

	start_instruction(tfh);

}



void tfh_restart(struct gru_tlb_fault_handle *tfh)

{

	tfh->opc = TFHOP_RESTART;

	start_instruction(tfh);

}



void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh)

{

	tfh->opc = TFHOP_USER_POLLING_MODE;

	start_instruction(tfh);

}



void tfh_exception(struct gru_tlb_fault_handle *tfh)

{

	tfh->opc = TFHOP_EXCEPTION;

	start_instruction(tfh);

}

drivers/misc/sgi-gru/gruhandles.h

+17 −159
Original line number Diff line number Diff line
@@ -495,164 +495,22 @@ enum gru_cbr_state { 
/* minimum TLB purge count to ensure a full purge */

#define GRUMAXINVAL		1024UL





/* Extract the status field from a kernel handle */

#define GET_MSEG_HANDLE_STATUS(h)	(((*(unsigned long *)(h)) >> 16) & 3)



static inline void start_instruction(void *h)

{

	unsigned long *w0 = h;



	wmb();		/* setting CMD bit must be last */

	*w0 = *w0 | 1;

	gru_flush_cache(h);

}



static inline int wait_instruction_complete(void *h)

{

	int status;



	do {

		cpu_relax();

		barrier();

		status = GET_MSEG_HANDLE_STATUS(h);

	} while (status == CCHSTATUS_ACTIVE);

	return status;

}



#if defined CONFIG_IA64

static inline void cch_allocate_set_asids(

		  struct gru_context_configuration_handle *cch, int asidval)

{

	int i;



	for (i = 0; i <= RGN_HPAGE; i++) {  /*  assume HPAGE is last region */

		cch->asid[i] = (asidval++);

#if 0

		/* ZZZ hugepages not supported yet */

		if (i == RGN_HPAGE)

			cch->sizeavail[i] = GRU_SIZEAVAIL(hpage_shift);

		else

#endif

			cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT);

	}

}

#elif defined CONFIG_X86_64

static inline void cch_allocate_set_asids(

		  struct gru_context_configuration_handle *cch, int asidval)

{

	int i;



	for (i = 0; i < 8; i++) {

		cch->asid[i] = asidval++;

		cch->sizeavail[i] = GRU_SIZEAVAIL(PAGE_SHIFT) |

			GRU_SIZEAVAIL(21);

	}

}

#endif



static inline int cch_allocate(struct gru_context_configuration_handle *cch,

			       int asidval, unsigned long cbrmap,

			       unsigned long dsrmap)

{

	cch_allocate_set_asids(cch, asidval);

	cch->dsr_allocation_map = dsrmap;

	cch->cbr_allocation_map = cbrmap;

	cch->opc = CCHOP_ALLOCATE;

	start_instruction(cch);

	return wait_instruction_complete(cch);

}



static inline int cch_start(struct gru_context_configuration_handle *cch)

{

	cch->opc = CCHOP_START;

	start_instruction(cch);

	return wait_instruction_complete(cch);

}



static inline int cch_interrupt(struct gru_context_configuration_handle *cch)

{

	cch->opc = CCHOP_INTERRUPT;

	start_instruction(cch);

	return wait_instruction_complete(cch);

}



static inline int cch_deallocate(struct gru_context_configuration_handle *cch)

{

	cch->opc = CCHOP_DEALLOCATE;

	start_instruction(cch);

	return wait_instruction_complete(cch);

}



static inline int cch_interrupt_sync(struct gru_context_configuration_handle

				     *cch)

{

	cch->opc = CCHOP_INTERRUPT_SYNC;

	start_instruction(cch);

	return wait_instruction_complete(cch);

}



static inline int tgh_invalidate(struct gru_tlb_global_handle *tgh,

				 unsigned long vaddr, unsigned long vaddrmask,

				 int asid, int pagesize, int global, int n,

				 unsigned short ctxbitmap)

{

	tgh->vaddr = vaddr;

	tgh->asid = asid;

	tgh->pagesize = pagesize;

	tgh->n = n;

	tgh->global = global;

	tgh->vaddrmask = vaddrmask;

	tgh->ctxbitmap = ctxbitmap;

	tgh->opc = TGHOP_TLBINV;

	start_instruction(tgh);

	return wait_instruction_complete(tgh);

}



static inline void tfh_write_only(struct gru_tlb_fault_handle *tfh,

				  unsigned long pfn, unsigned long vaddr,

				  int asid, int dirty, int pagesize)

{

	tfh->fillasid = asid;

	tfh->fillvaddr = vaddr;

	tfh->pfn = pfn;

	tfh->dirty = dirty;

	tfh->pagesize = pagesize;

	tfh->opc = TFHOP_WRITE_ONLY;

	start_instruction(tfh);

}



static inline void tfh_write_restart(struct gru_tlb_fault_handle *tfh,

				     unsigned long paddr, int gaa,

				     unsigned long vaddr, int asid, int dirty,

				     int pagesize)

{

	tfh->fillasid = asid;

	tfh->fillvaddr = vaddr;

	tfh->pfn = paddr >> GRU_PADDR_SHIFT;

	tfh->gaa = gaa;

	tfh->dirty = dirty;

	tfh->pagesize = pagesize;

	tfh->opc = TFHOP_WRITE_RESTART;

	start_instruction(tfh);

}



static inline void tfh_restart(struct gru_tlb_fault_handle *tfh)

{

	tfh->opc = TFHOP_RESTART;

	start_instruction(tfh);

}



static inline void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh)

{

	tfh->opc = TFHOP_USER_POLLING_MODE;

	start_instruction(tfh);

}



static inline void tfh_exception(struct gru_tlb_fault_handle *tfh)

{

	tfh->opc = TFHOP_EXCEPTION;

	start_instruction(tfh);

}

int cch_allocate(struct gru_context_configuration_handle *cch,

       int asidval, unsigned long cbrmap, unsigned long dsrmap);



int cch_start(struct gru_context_configuration_handle *cch);

int cch_interrupt(struct gru_context_configuration_handle *cch);

int cch_deallocate(struct gru_context_configuration_handle *cch);

int cch_interrupt_sync(struct gru_context_configuration_handle *cch);

int tgh_invalidate(struct gru_tlb_global_handle *tgh, unsigned long vaddr,

	unsigned long vaddrmask, int asid, int pagesize, int global, int n,

	unsigned short ctxbitmap);

void tfh_write_only(struct gru_tlb_fault_handle *tfh, unsigned long pfn,

	unsigned long vaddr, int asid, int dirty, int pagesize);

void tfh_write_restart(struct gru_tlb_fault_handle *tfh, unsigned long paddr,

	int gaa, unsigned long vaddr, int asid, int dirty, int pagesize);

void tfh_restart(struct gru_tlb_fault_handle *tfh);

void tfh_user_polling_mode(struct gru_tlb_fault_handle *tfh);

void tfh_exception(struct gru_tlb_fault_handle *tfh);



#endif /* __GRUHANDLES_H__ */

drivers/misc/sgi-gru/grutables.h

+3 −0
Original line number Diff line number Diff line
@@ -239,6 +239,9 @@ struct gru_stats_s { 


};



enum mcs_op {cchop_allocate, cchop_start, cchop_interrupt, cchop_interrupt_sync,

	cchop_deallocate, tghop_invalidate, mcsop_last};



#define OPT_DPRINT	1

#define OPT_STATS	2

#define GRU_QUICKLOOK	4

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