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path: root/drivers/misc/sgi-xp/xpc_sn2.c
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Diffstat (limited to 'drivers/misc/sgi-xp/xpc_sn2.c')
-rw-r--r--drivers/misc/sgi-xp/xpc_sn2.c73
1 files changed, 39 insertions, 34 deletions
diff --git a/drivers/misc/sgi-xp/xpc_sn2.c b/drivers/misc/sgi-xp/xpc_sn2.c
index e42c3038203..f82889f6015 100644
--- a/drivers/misc/sgi-xp/xpc_sn2.c
+++ b/drivers/misc/sgi-xp/xpc_sn2.c
@@ -210,28 +210,26 @@ static void
xpc_send_activate_IRQ_sn2(u64 amos_page_pa, int from_nasid, int to_nasid,
int to_phys_cpuid)
{
- int w_index = XPC_NASID_W_INDEX(from_nasid);
- int b_index = XPC_NASID_B_INDEX(from_nasid);
struct amo *amos = (struct amo *)__va(amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS_SN2 *
sizeof(struct amo)));
- (void)xpc_send_IRQ_sn2(&amos[w_index], (1UL << b_index), to_nasid,
+ (void)xpc_send_IRQ_sn2(&amos[BIT_WORD(from_nasid / 2)],
+ BIT_MASK(from_nasid / 2), to_nasid,
to_phys_cpuid, SGI_XPC_ACTIVATE);
}
static void
xpc_send_local_activate_IRQ_sn2(int from_nasid)
{
- int w_index = XPC_NASID_W_INDEX(from_nasid);
- int b_index = XPC_NASID_B_INDEX(from_nasid);
struct amo *amos = (struct amo *)__va(xpc_vars_sn2->amos_page_pa +
(XPC_ACTIVATE_IRQ_AMOS_SN2 *
sizeof(struct amo)));
/* fake the sending and receipt of an activate IRQ from remote nasid */
- FETCHOP_STORE_OP(TO_AMO((u64)&amos[w_index].variable), FETCHOP_OR,
- (1UL << b_index));
+ FETCHOP_STORE_OP(TO_AMO((u64)&amos[BIT_WORD(from_nasid / 2)].variable),
+ FETCHOP_OR, BIT_MASK(from_nasid / 2));
+
atomic_inc(&xpc_activate_IRQ_rcvd);
wake_up_interruptible(&xpc_activate_IRQ_wq);
}
@@ -439,7 +437,8 @@ xpc_indicate_partition_engaged_sn2(struct xpc_partition *part)
/* set bit corresponding to our partid in remote partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
- (1UL << sn_partition_id));
+ BIT(sn_partition_id));
+
/*
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
@@ -466,7 +465,8 @@ xpc_indicate_partition_disengaged_sn2(struct xpc_partition *part)
/* clear bit corresponding to our partid in remote partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
- ~(1UL << sn_partition_id));
+ ~BIT(sn_partition_id));
+
/*
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
@@ -497,7 +497,7 @@ xpc_partition_engaged_sn2(short partid)
/* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
- (1UL << partid)) != 0;
+ BIT(partid)) != 0;
}
static int
@@ -518,7 +518,7 @@ xpc_assume_partition_disengaged_sn2(short partid)
/* clear bit(s) based on partid mask in our partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
- ~(1UL << partid));
+ ~BIT(partid));
}
/* original protection values for each node */
@@ -639,7 +639,7 @@ xpc_rsvd_page_init_sn2(struct xpc_rsvd_page *rp)
xp_max_npartitions);
/* initialize the activate IRQ related amo variables */
- for (i = 0; i < xpc_nasid_mask_words; i++)
+ for (i = 0; i < xpc_nasid_mask_nlongs; i++)
(void)xpc_init_IRQ_amo_sn2(XPC_ACTIVATE_IRQ_AMOS_SN2 + i);
/* initialize the engaged remote partitions related amo variables */
@@ -796,7 +796,8 @@ xpc_request_partition_deactivation_sn2(struct xpc_partition *part)
/* set bit corresponding to our partid in remote partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_OR,
- (1UL << sn_partition_id));
+ BIT(sn_partition_id));
+
/*
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
@@ -831,7 +832,8 @@ xpc_cancel_partition_deactivation_request_sn2(struct xpc_partition *part)
/* clear bit corresponding to our partid in remote partition's amo */
FETCHOP_STORE_OP(TO_AMO((u64)&amo->variable), FETCHOP_AND,
- ~(1UL << sn_partition_id));
+ ~BIT(sn_partition_id));
+
/*
* We must always use the nofault function regardless of whether we
* are on a Shub 1.1 system or a Shub 1.2 slice 0xc processor. If we
@@ -853,7 +855,7 @@ xpc_partition_deactivation_requested_sn2(short partid)
/* our partition's amo variable ANDed with partid mask */
return (FETCHOP_LOAD_OP(TO_AMO((u64)&amo->variable), FETCHOP_LOAD) &
- (1UL << partid)) != 0;
+ BIT(partid)) != 0;
}
/*
@@ -1031,28 +1033,31 @@ xpc_identify_activate_IRQ_req_sn2(int nasid)
int
xpc_identify_activate_IRQ_sender_sn2(void)
{
- int word, bit;
- u64 nasid_mask;
+ int l;
+ int b;
+ unsigned long nasid_mask_long;
u64 nasid; /* remote nasid */
int n_IRQs_detected = 0;
struct amo *act_amos;
act_amos = xpc_vars_sn2->amos_page + XPC_ACTIVATE_IRQ_AMOS_SN2;
- /* scan through act amo variable looking for non-zero entries */
- for (word = 0; word < xpc_nasid_mask_words; word++) {
+ /* scan through activate amo variables looking for non-zero entries */
+ for (l = 0; l < xpc_nasid_mask_nlongs; l++) {
if (xpc_exiting)
break;
- nasid_mask = xpc_receive_IRQ_amo_sn2(&act_amos[word]);
- if (nasid_mask == 0) {
- /* no IRQs from nasids in this variable */
+ nasid_mask_long = xpc_receive_IRQ_amo_sn2(&act_amos[l]);
+
+ b = find_first_bit(&nasid_mask_long, BITS_PER_LONG);
+ if (b >= BITS_PER_LONG) {
+ /* no IRQs from nasids in this amo variable */
continue;
}
- dev_dbg(xpc_part, "amo[%d] gave back 0x%lx\n", word,
- nasid_mask);
+ dev_dbg(xpc_part, "amo[%d] gave back 0x%lx\n", l,
+ nasid_mask_long);
/*
* If this nasid has been added to the machine since
@@ -1060,19 +1065,19 @@ xpc_identify_activate_IRQ_sender_sn2(void)
* remote nasid in our reserved pages machine mask.
* This is used in the event of module reload.
*/
- xpc_mach_nasids[word] |= nasid_mask;
+ xpc_mach_nasids[l] |= nasid_mask_long;
/* locate the nasid(s) which sent interrupts */
- for (bit = 0; bit < (8 * sizeof(u64)); bit++) {
- if (nasid_mask & (1UL << bit)) {
- n_IRQs_detected++;
- nasid = XPC_NASID_FROM_W_B(word, bit);
- dev_dbg(xpc_part, "interrupt from nasid %ld\n",
- nasid);
- xpc_identify_activate_IRQ_req_sn2(nasid);
- }
- }
+ do {
+ n_IRQs_detected++;
+ nasid = (l * BITS_PER_LONG + b) * 2;
+ dev_dbg(xpc_part, "interrupt from nasid %ld\n", nasid);
+ xpc_identify_activate_IRQ_req_sn2(nasid);
+
+ b = find_next_bit(&nasid_mask_long, BITS_PER_LONG,
+ b + 1);
+ } while (b < BITS_PER_LONG);
}
return n_IRQs_detected;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 05:28:15 +0000