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x86, UV: Fix and clean up bau code to use uv_gpa_to_pnode() 

Create an inline function to extract the pnode from a global
physical address and then convert the broadcast assist unit to
use the newly created uv_gpa_to_pnode function.

The open-coded code was wrong as well - it might explain a
few of our unexplained bau hangs.

Signed-off-by: Robin Holt <holt@sgi.com>
Acked-by: Cliff Whickman <cpw@sgi.com>
Cc: linux-mm@kvack.org
Cc: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20091016112920.GZ8903@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Robin Holt 2009-10-16 06:29:20 -05:00 committed by Ingo Molnar
parent 93ae5012a7
commit 1d21e6e3ff
2 changed files with 17 additions and 6 deletions
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16
arch/x86/include/asm/uv/uv_hub.h
View File

@ -114,7 +114,7 @@
/*
* The largest possible NASID of a C or M brick (+ 2)
*/
#define UV_MAX_NASID_VALUE (UV_MAX_NUMALINK_NODES * 2)
#define UV_MAX_NASID_VALUE (UV_MAX_NUMALINK_BLADES * 2)
struct uv_scir_s {
struct timer_list timer;
@ -230,6 +230,20 @@ static inline unsigned long uv_gpa(void *v)
return uv_soc_phys_ram_to_gpa(__pa(v));
}
/* gnode -> pnode */
static inline unsigned long uv_gpa_to_gnode(unsigned long gpa)
{
return gpa >> uv_hub_info->m_val;
}
/* gpa -> pnode */
static inline int uv_gpa_to_pnode(unsigned long gpa)
{
unsigned long n_mask = (1UL << uv_hub_info->n_val) - 1;
return uv_gpa_to_gnode(gpa) & n_mask;
}
/* pnode, offset --> socket virtual */
static inline void *uv_pnode_offset_to_vaddr(int pnode, unsigned long offset)
{

7
arch/x86/kernel/tlb_uv.c
View File

@ -23,8 +23,6 @@
static struct bau_control **uv_bau_table_bases __read_mostly;
static int uv_bau_retry_limit __read_mostly;
/* position of pnode (which is nasid>>1): */
static int uv_nshift __read_mostly;
/* base pnode in this partition */
static int uv_partition_base_pnode __read_mostly;
@ -723,7 +721,7 @@ uv_activation_descriptor_init(int node, int pnode)
BUG_ON(!adp);
pa = uv_gpa(adp); /* need the real nasid*/
n = pa >> uv_nshift;
n = uv_gpa_to_pnode(pa);
m = pa & uv_mmask;
uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE,
@ -778,7 +776,7 @@ uv_payload_queue_init(int node, int pnode, struct bau_control *bau_tablesp)
* need the pnode of where the memory was really allocated
*/
pa = uv_gpa(pqp);
pn = pa >> uv_nshift;
pn = uv_gpa_to_pnode(pa);
uv_write_global_mmr64(pnode,
UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST,
((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) |
@ -843,7 +841,6 @@ static int __init uv_bau_init(void)
GFP_KERNEL, cpu_to_node(cur_cpu));
uv_bau_retry_limit = 1;
uv_nshift = uv_hub_info->m_val;
uv_mmask = (1UL << uv_hub_info->m_val) - 1;
nblades = uv_num_possible_blades();