diff options
| -rw-r--r-- | drivers/misc/sgi-gru/gru_instructions.h | 13 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grukservices.c | 23 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grukservices.h | 14 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/gruprocfs.c | 1 | ||||
| -rw-r--r-- | drivers/misc/sgi-gru/grutables.h | 1 |
5 files changed, 52 insertions, 0 deletions
diff --git a/drivers/misc/sgi-gru/gru_instructions.h b/drivers/misc/sgi-gru/gru_instructions.h index 3c9c06618e6..e033b6ce4a3 100644 --- a/drivers/misc/sgi-gru/gru_instructions.h +++ b/drivers/misc/sgi-gru/gru_instructions.h @@ -340,6 +340,19 @@ static inline void gru_start_instruction(struct gru_instruction *ins, int op32) * - nelem and stride are in elements * - tri0/tri1 is in bytes for the beginning of the data segment. */ +static inline void gru_vload_phys(void *cb, unsigned long gpa, + unsigned int tri0, int iaa, unsigned long hints) +{ + struct gru_instruction *ins = (struct gru_instruction *)cb; + + ins->baddr0 = (long)gpa | ((unsigned long)iaa << 62); + ins->nelem = 1; + ins->tri0 = tri0; + ins->op1_stride = 1; + gru_start_instruction(ins, __opword(OP_VLOAD, 0, XTYPE_DW, iaa, 0, + CB_IMA(hints))); +} + 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) diff --git a/drivers/misc/sgi-gru/grukservices.c b/drivers/misc/sgi-gru/grukservices.c index 766e21e1557..d2b149facda 100644 --- a/drivers/misc/sgi-gru/grukservices.c +++ b/drivers/misc/sgi-gru/grukservices.c @@ -858,6 +858,29 @@ EXPORT_SYMBOL_GPL(gru_get_next_message); /* ---------------------- GRU DATA COPY FUNCTIONS ---------------------------*/ /* + * Load a DW from a global GPA. The GPA can be a memory or MMR address. + */ +int gru_read_gpa(unsigned long *value, unsigned long gpa) +{ + void *cb; + void *dsr; + int ret, iaa; + + STAT(read_gpa); + if (gru_get_cpu_resources(GRU_NUM_KERNEL_DSR_BYTES, &cb, &dsr)) + return MQE_BUG_NO_RESOURCES; + iaa = gpa >> 62; + gru_vload_phys(cb, gpa, gru_get_tri(dsr), iaa, IMA); + ret = gru_wait(cb); + if (ret == CBS_IDLE) + *value = *(unsigned long *)dsr; + gru_free_cpu_resources(cb, dsr); + return ret; +} +EXPORT_SYMBOL_GPL(gru_read_gpa); + + +/* * Copy a block of data using the GRU resources */ int gru_copy_gpa(unsigned long dest_gpa, unsigned long src_gpa, diff --git a/drivers/misc/sgi-gru/grukservices.h b/drivers/misc/sgi-gru/grukservices.h index d60d34bca44..02aa94d8484 100644 --- a/drivers/misc/sgi-gru/grukservices.h +++ b/drivers/misc/sgi-gru/grukservices.h @@ -131,6 +131,20 @@ extern void *gru_get_next_message(struct gru_message_queue_desc *mqd); /* + * Read a GRU global GPA. Source can be located in a remote partition. + * + * Input: + * value memory address where MMR value is returned + * gpa source numalink physical address of GPA + * + * Output: + * 0 OK + * >0 error + */ +int gru_read_gpa(unsigned long *value, unsigned long gpa); + + +/* * Copy data using the GRU. Source or destination can be located in a remote * partition. * diff --git a/drivers/misc/sgi-gru/gruprocfs.c b/drivers/misc/sgi-gru/gruprocfs.c index 3f2375c5ba5..cf6b3e3034d 100644 --- a/drivers/misc/sgi-gru/gruprocfs.c +++ b/drivers/misc/sgi-gru/gruprocfs.c @@ -98,6 +98,7 @@ static int statistics_show(struct seq_file *s, void *p) printstat(s, flush_tlb_gru_tgh); printstat(s, flush_tlb_gru_zero_asid); printstat(s, copy_gpa); + printstat(s, read_gpa); printstat(s, mesq_receive); printstat(s, mesq_receive_none); printstat(s, mesq_send); diff --git a/drivers/misc/sgi-gru/grutables.h b/drivers/misc/sgi-gru/grutables.h index 46990bcfa53..f7b553a56ed 100644 --- a/drivers/misc/sgi-gru/grutables.h +++ b/drivers/misc/sgi-gru/grutables.h @@ -224,6 +224,7 @@ struct gru_stats_s { atomic_long_t flush_tlb_gru_zero_asid; atomic_long_t copy_gpa; + atomic_long_t read_gpa; atomic_long_t mesq_receive; atomic_long_t mesq_receive_none; |