diff options
author | Jack Steiner <steiner@sgi.com> | 2009-04-02 16:59:06 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-04-02 19:05:06 -0700 |
commit | a24e5e1caf4875bbe09f328b5f4daef6d25ebcc4 (patch) | |
tree | 3b9214880d848c1b4b071fcf00eb39a8ef8cb47b /drivers | |
parent | 438846043af39fef286f68b197d42bd75f49898e (diff) | |
download | linux-a24e5e1caf4875bbe09f328b5f4daef6d25ebcc4.tar.bz2 |
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: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers')
-rw-r--r-- | drivers/misc/sgi-gru/Makefile | 2 | ||||
-rw-r--r-- | drivers/misc/sgi-gru/gruhandles.c | 197 | ||||
-rw-r--r-- | drivers/misc/sgi-gru/gruhandles.h | 176 | ||||
-rw-r--r-- | drivers/misc/sgi-gru/grutables.h | 3 |
4 files changed, 218 insertions, 160 deletions
diff --git a/drivers/misc/sgi-gru/Makefile b/drivers/misc/sgi-gru/Makefile index 9e9170b3599a..bcd8136d2f98 100644 --- a/drivers/misc/sgi-gru/Makefile +++ b/drivers/misc/sgi-gru/Makefile @@ -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 diff --git a/drivers/misc/sgi-gru/gruhandles.c b/drivers/misc/sgi-gru/gruhandles.c new file mode 100644 index 000000000000..5b82e7def16d --- /dev/null +++ b/drivers/misc/sgi-gru/gruhandles.c @@ -0,0 +1,197 @@ +/* + * 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); +} + diff --git a/drivers/misc/sgi-gru/gruhandles.h b/drivers/misc/sgi-gru/gruhandles.h index fb72a52a34a8..dfce8ea5da24 100644 --- a/drivers/misc/sgi-gru/gruhandles.h +++ b/drivers/misc/sgi-gru/gruhandles.h @@ -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__ */ diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h index cc0fc734405e..378a0894198e 100644 --- a/drivers/misc/sgi-gru/grutables.h +++ b/drivers/misc/sgi-gru/grutables.h @@ -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 |