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SGI UV: TLB shootdown using broadcast assist unit

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TLB shootdown for SGI UV.

v5: 6/12 corrections/improvements per Ingo's second review

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Ingo Molnar 2008-06-18 14:15:43 +02:00
parent b194b12050
commit dc163a41ff
2 changed files with 96 additions and 108 deletions
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183
arch/x86/kernel/tlb_uv.c
View File

@ -25,15 +25,8 @@ static int uv_bau_retry_limit __read_mostly;
static int uv_nshift __read_mostly; /* position of pnode (which is nasid>>1) */
static unsigned long uv_mmask __read_mostly;
char *status_table[] = {
"IDLE",
"ACTIVE",
"DESTINATION TIMEOUT",
"SOURCE TIMEOUT"
};
DEFINE_PER_CPU(struct ptc_stats, ptcstats);
DEFINE_PER_CPU(struct bau_control, bau_control);
static DEFINE_PER_CPU(struct ptc_stats, ptcstats);
static DEFINE_PER_CPU(struct bau_control, bau_control);
/*
* Free a software acknowledge hardware resource by clearing its Pending
@ -55,7 +48,6 @@ static void uv_reply_to_message(int resource,
if (msp)
msp->seen_by.bits = 0;
uv_write_local_mmr(UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, dw);
return;
}
/*
@ -73,7 +65,7 @@ static void uv_bau_process_message(struct bau_payload_queue_entry *msg,
cpu = uv_blade_processor_id();
msg->number_of_cpus =
uv_blade_nr_online_cpus(uv_node_to_blade_id(numa_node_id()));
this_cpu_mask = (unsigned long)1 << cpu;
this_cpu_mask = 1UL << cpu;
if (msp->seen_by.bits & this_cpu_mask)
return;
atomic_or_long(&msp->seen_by.bits, this_cpu_mask);
@ -94,7 +86,40 @@ static void uv_bau_process_message(struct bau_payload_queue_entry *msg,
atomic_inc_short(&msg->acknowledge_count);
if (msg->number_of_cpus == msg->acknowledge_count)
uv_reply_to_message(sw_ack_slot, msg, msp);
return;
}
/*
* Examine the payload queue on one distribution node to see
* which messages have not been seen, and which cpu(s) have not seen them.
*
* Returns the number of cpu's that have not responded.
*/
static int uv_examine_destination(struct bau_control *bau_tablesp, int sender)
{
int i;
int j;
int count = 0;
struct bau_payload_queue_entry *msg;
struct bau_msg_status *msp;
for (msg = bau_tablesp->va_queue_first, i = 0; i < DEST_Q_SIZE;
msg++, i++) {
if ((msg->sending_cpu == sender) && (!msg->replied_to)) {
msp = bau_tablesp->msg_statuses + i;
printk(KERN_DEBUG
"blade %d: address:%#lx %d of %d, not cpu(s): ",
i, msg->address, msg->acknowledge_count,
msg->number_of_cpus);
for (j = 0; j < msg->number_of_cpus; j++) {
if (!((long)1 << j & msp-> seen_by.bits)) {
count++;
printk("%d ", j);
}
}
printk("\n");
}
}
return count;
}
/*
@ -107,40 +132,14 @@ static int uv_examine_destinations(struct bau_target_nodemask *distribution)
{
int sender;
int i;
int j;
int k;
int count = 0;
struct bau_control *bau_tablesp;
struct bau_payload_queue_entry *msg;
struct bau_msg_status *msp;
sender = smp_processor_id();
for (i = 0; i < (sizeof(struct bau_target_nodemask) * BITSPERBYTE);
i++) {
if (!bau_node_isset(i, distribution))
continue;
bau_tablesp = uv_bau_table_bases[i];
for (msg = bau_tablesp->va_queue_first, j = 0;
j < DESTINATION_PAYLOAD_QUEUE_SIZE; msg++, j++) {
if ((msg->sending_cpu == sender) &&
(!msg->replied_to)) {
msp = bau_tablesp->msg_statuses + j;
printk(KERN_DEBUG
"blade %d: address:%#lx %d of %d, not cpu(s): ",
i, msg->address,
msg->acknowledge_count,
msg->number_of_cpus);
for (k = 0; k < msg->number_of_cpus;
k++) {
if (!((long)1 << k & msp->
seen_by.bits)) {
count++;
printk("%d ", k);
}
}
printk("\n");
}
}
count += uv_examine_destination(uv_bau_table_bases[i], sender);
}
return count;
}
@ -150,7 +149,7 @@ static int uv_examine_destinations(struct bau_target_nodemask *distribution)
*
* return COMPLETE, RETRY or GIVEUP
*/
static int uv_wait_completion(struct bau_activation_descriptor *bau_desc,
static int uv_wait_completion(struct bau_desc *bau_desc,
unsigned long mmr_offset, int right_shift)
{
int exams = 0;
@ -213,8 +212,8 @@ static int uv_wait_completion(struct bau_activation_descriptor *bau_desc,
* Returns 0 if some remote flushing remains to be done. The mask is left
* unchanged.
*/
int uv_flush_send_and_wait(int cpu, int this_blade,
struct bau_activation_descriptor *bau_desc, cpumask_t *cpumaskp)
int uv_flush_send_and_wait(int cpu, int this_blade, struct bau_desc *bau_desc,
cpumask_t *cpumaskp)
{
int completion_status = 0;
int right_shift;
@ -237,8 +236,8 @@ int uv_flush_send_and_wait(int cpu, int this_blade,
time1 = get_cycles();
do {
tries++;
index = ((unsigned long)
1 << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT) | cpu;
index = (1UL << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT) |
cpu;
uv_write_local_mmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index);
completion_status = uv_wait_completion(bau_desc, mmr_offset,
right_shift);
@ -303,7 +302,7 @@ int uv_flush_tlb_others(cpumask_t *cpumaskp, struct mm_struct *mm,
int cpu;
int this_blade;
int locals = 0;
struct bau_activation_descriptor *bau_desc;
struct bau_desc *bau_desc;
cpu = uv_blade_processor_id();
this_blade = uv_numa_blade_id();
@ -315,8 +314,7 @@ int uv_flush_tlb_others(cpumask_t *cpumaskp, struct mm_struct *mm,
i = 0;
for_each_cpu_mask(bit, *cpumaskp) {
blade = uv_cpu_to_blade_id(bit);
if (blade > (UV_DISTRIBUTION_SIZE - 1))
BUG();
BUG_ON(blade > (UV_DISTRIBUTION_SIZE - 1));
if (blade == this_blade) {
locals++;
continue;
@ -360,6 +358,8 @@ void uv_bau_message_interrupt(struct pt_regs *regs)
{
struct bau_payload_queue_entry *pqp;
struct bau_payload_queue_entry *msg;
struct bau_payload_queue_entry *va_queue_first;
struct bau_payload_queue_entry *va_queue_last;
struct pt_regs *old_regs = set_irq_regs(regs);
cycles_t time1, time2;
int msg_slot;
@ -376,7 +376,8 @@ void uv_bau_message_interrupt(struct pt_regs *regs)
local_pnode = uv_blade_to_pnode(uv_numa_blade_id());
pqp = __get_cpu_var(bau_control).va_queue_first;
pqp = va_queue_first = __get_cpu_var(bau_control).va_queue_first;
va_queue_last = __get_cpu_var(bau_control).va_queue_last;
msg = __get_cpu_var(bau_control).bau_msg_head;
while (msg->sw_ack_vector) {
count++;
@ -387,8 +388,8 @@ void uv_bau_message_interrupt(struct pt_regs *regs)
uv_bau_process_message(msg, msg_slot, sw_ack_slot);
msg++;
if (msg > __get_cpu_var(bau_control).va_queue_last)
msg = __get_cpu_var(bau_control).va_queue_first;
if (msg > va_queue_last)
msg = va_queue_first;
__get_cpu_var(bau_control).bau_msg_head = msg;
}
if (!count)
@ -401,7 +402,6 @@ void uv_bau_message_interrupt(struct pt_regs *regs)
irq_exit();
set_irq_regs(old_regs);
return;
}
static void uv_enable_timeouts(void)
@ -423,7 +423,6 @@ static void uv_enable_timeouts(void)
pnode = uv_blade_to_pnode(blade);
cur_cpu += uv_blade_nr_possible_cpus(i);
}
return;
}
static void *uv_ptc_seq_start(struct seq_file *file, loff_t *offset)
@ -535,10 +534,10 @@ static ssize_t uv_ptc_proc_write(struct file *file, const char __user *user,
}
static const struct seq_operations uv_ptc_seq_ops = {
.start = uv_ptc_seq_start,
.next = uv_ptc_seq_next,
.stop = uv_ptc_seq_stop,
.show = uv_ptc_seq_show
.start = uv_ptc_seq_start,
.next = uv_ptc_seq_next,
.stop = uv_ptc_seq_stop,
.show = uv_ptc_seq_show
};
static int uv_ptc_proc_open(struct inode *inode, struct file *file)
@ -568,6 +567,7 @@ static int __init uv_ptc_init(void)
if (!proc_uv_ptc) {
printk(KERN_ERR "unable to create %s proc entry\n",
UV_PTC_BASENAME);
remove_proc_entry("sgi_uv", NULL);
return -EINVAL;
}
proc_uv_ptc->proc_fops = &proc_uv_ptc_operations;
@ -582,33 +582,26 @@ static struct bau_control * __init uv_table_bases_init(int blade, int node)
int i;
int *ip;
struct bau_msg_status *msp;
struct bau_control *bau_tablesp;
struct bau_control *bau_tabp;
bau_tablesp =
bau_tabp =
kmalloc_node(sizeof(struct bau_control), GFP_KERNEL, node);
if (!bau_tablesp)
BUG();
bau_tablesp->msg_statuses =
BUG_ON(!bau_tabp);
bau_tabp->msg_statuses =
kmalloc_node(sizeof(struct bau_msg_status) *
DESTINATION_PAYLOAD_QUEUE_SIZE, GFP_KERNEL, node);
if (!bau_tablesp->msg_statuses)
BUG();
for (i = 0, msp = bau_tablesp->msg_statuses;
i < DESTINATION_PAYLOAD_QUEUE_SIZE; i++, msp++) {
DEST_Q_SIZE, GFP_KERNEL, node);
BUG_ON(!bau_tabp->msg_statuses);
for (i = 0, msp = bau_tabp->msg_statuses; i < DEST_Q_SIZE; i++, msp++)
bau_cpubits_clear(&msp->seen_by, (int)
uv_blade_nr_possible_cpus(blade));
}
bau_tablesp->watching =
kmalloc_node(sizeof(int) * DESTINATION_NUM_RESOURCES,
GFP_KERNEL, node);
if (!bau_tablesp->watching)
BUG();
for (i = 0, ip = bau_tablesp->watching;
i < DESTINATION_PAYLOAD_QUEUE_SIZE; i++, ip++) {
bau_tabp->watching =
kmalloc_node(sizeof(int) * DEST_NUM_RESOURCES, GFP_KERNEL, node);
BUG_ON(!bau_tabp->watching);
for (i = 0, ip = bau_tabp->watching; i < DEST_Q_SIZE; i++, ip++) {
*ip = 0;
}
uv_bau_table_bases[blade] = bau_tablesp;
return bau_tablesp;
uv_bau_table_bases[blade] = bau_tabp;
return bau_tabsp;
}
/*
@ -616,7 +609,7 @@ static struct bau_control * __init uv_table_bases_init(int blade, int node)
*/
static void __init uv_table_bases_finish(int blade, int node, int cur_cpu,
struct bau_control *bau_tablesp,
struct bau_activation_descriptor *adp)
struct bau_desc *adp)
{
int i;
struct bau_control *bcp;
@ -636,7 +629,7 @@ static void __init uv_table_bases_finish(int blade, int node, int cur_cpu,
/*
* initialize the sending side's sending buffers
*/
static struct bau_activation_descriptor * __init
static struct bau_desc * __init
uv_activation_descriptor_init(int node, int pnode)
{
int i;
@ -644,13 +637,12 @@ uv_activation_descriptor_init(int node, int pnode)
unsigned long m;
unsigned long n;
unsigned long mmr_image;
struct bau_activation_descriptor *adp;
struct bau_activation_descriptor *ad2;
struct bau_desc *adp;
struct bau_desc *ad2;
adp = (struct bau_activation_descriptor *)
adp = (struct bau_desc *)
kmalloc_node(16384, GFP_KERNEL, node);
if (!adp)
BUG();
BUG_ON(!adp);
pa = __pa((unsigned long)adp);
n = pa >> uv_nshift;
m = pa & uv_mmask;
@ -660,7 +652,7 @@ uv_activation_descriptor_init(int node, int pnode)
UVH_LB_BAU_SB_DESCRIPTOR_BASE,
(n << UV_DESC_BASE_PNODE_SHIFT | m));
for (i = 0, ad2 = adp; i < UV_ACTIVATION_DESCRIPTOR_SIZE; i++, ad2++) {
memset(ad2, 0, sizeof(struct bau_activation_descriptor));
memset(ad2, 0, sizeof(struct bau_desc));
ad2->header.sw_ack_flag = 1;
ad2->header.base_dest_nodeid =
uv_blade_to_pnode(uv_cpu_to_blade_id(0));
@ -683,12 +675,10 @@ static struct bau_payload_queue_entry * __init uv_payload_queue_init(int node,
char *cp;
struct bau_payload_queue_entry *pqp;
pqp = (struct bau_payload_queue_entry *)
kmalloc_node((DESTINATION_PAYLOAD_QUEUE_SIZE + 1) *
sizeof(struct bau_payload_queue_entry),
GFP_KERNEL, node);
if (!pqp)
BUG();
pqp = (struct bau_payload_queue_entry *) kmalloc_node(
(DEST_Q_SIZE + 1) * sizeof(struct bau_payload_queue_entry),
GFP_KERNEL, node);
BUG_ON(!pqp);
cp = (char *)pqp + 31;
pqp = (struct bau_payload_queue_entry *)(((unsigned long)cp >> 5) << 5);
bau_tablesp->va_queue_first = pqp;
@ -699,13 +689,11 @@ static struct bau_payload_queue_entry * __init uv_payload_queue_init(int node,
uv_physnodeaddr(pqp));
uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL,
uv_physnodeaddr(pqp));
bau_tablesp->va_queue_last =
pqp + (DESTINATION_PAYLOAD_QUEUE_SIZE - 1);
bau_tablesp->va_queue_last = pqp + (DEST_Q_SIZE - 1);
uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST,
(unsigned long)
uv_physnodeaddr(bau_tablesp->va_queue_last));
memset(pqp, 0, sizeof(struct bau_payload_queue_entry) *
DESTINATION_PAYLOAD_QUEUE_SIZE);
memset(pqp, 0, sizeof(struct bau_payload_queue_entry) * DEST_Q_SIZE);
return pqp;
}
@ -717,7 +705,7 @@ static int __init uv_init_blade(int blade, int node, int cur_cpu)
int pnode;
unsigned long pa;
unsigned long apicid;
struct bau_activation_descriptor *adp;
struct bau_desc *adp;
struct bau_payload_queue_entry *pqp;
struct bau_control *bau_tablesp;
@ -755,7 +743,7 @@ static int __init uv_bau_init(void)
uv_bau_retry_limit = 1;
uv_nshift = uv_hub_info->n_val;
uv_mmask = ((unsigned long)1 << uv_hub_info->n_val) - 1;
uv_mmask = (1UL << uv_hub_info->n_val) - 1;
nblades = 0;
last_blade = -1;
for_each_online_node(node) {
@ -767,8 +755,7 @@ static int __init uv_bau_init(void)
}
uv_bau_table_bases = (struct bau_control **)
kmalloc(nblades * sizeof(struct bau_control *), GFP_KERNEL);
if (!uv_bau_table_bases)
BUG();
BUG_ON(!uv_bau_table_bases);
last_blade = -1;
for_each_online_node(node) {
blade = uv_node_to_blade_id(node);

21
include/asm-x86/uv/uv_bau.h
View File

@ -54,25 +54,25 @@
/*
* bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1
*/
#define DESC_STATUS_IDLE 0
#define DESC_STATUS_ACTIVE 1
#define DESC_STATUS_DESTINATION_TIMEOUT 2
#define DESC_STATUS_SOURCE_TIMEOUT 3
#define DESC_STATUS_IDLE 0
#define DESC_STATUS_ACTIVE 1
#define DESC_STATUS_DESTINATION_TIMEOUT 2
#define DESC_STATUS_SOURCE_TIMEOUT 3
/*
* source side threshholds at which message retries print a warning
*/
#define SOURCE_TIMEOUT_LIMIT 20
#define DESTINATION_TIMEOUT_LIMIT 20
#define SOURCE_TIMEOUT_LIMIT 20
#define DESTINATION_TIMEOUT_LIMIT 20
/*
* number of entries in the destination side payload queue
*/
#define DESTINATION_PAYLOAD_QUEUE_SIZE 17
#define DEST_Q_SIZE 17
/*
* number of destination side software ack resources
*/
#define DESTINATION_NUM_RESOURCES 8
#define DEST_NUM_RESOURCES 8
#define MAX_CPUS_PER_NODE 32
/*
* completion statuses for sending a TLB flush message
@ -197,10 +197,11 @@ struct bau_msg_header {
};
/*
* The activation descriptor:
* The format of the message to send, plus all accompanying control
* Should be 64 bytes
*/
struct bau_activation_descriptor {
struct bau_desc {
struct bau_target_nodemask distribution;
/*
* message template, consisting of header and payload:
@ -281,7 +282,7 @@ struct bau_sw_ack_status {
* one on every node and per-cpu; to locate the software tables
*/
struct bau_control {
struct bau_activation_descriptor *descriptor_base;
struct bau_desc *descriptor_base;
struct bau_payload_queue_entry *bau_msg_head;
struct bau_payload_queue_entry *va_queue_first;
struct bau_payload_queue_entry *va_queue_last;