summaryrefslogtreecommitdiffstats
path: root/arch/x86/kernel
diff options
context:
space:
mode:
authorThomas Gleixner <tglx@linutronix.de>2010-10-23 11:23:37 +0200
committerThomas Gleixner <tglx@linutronix.de>2010-10-27 14:30:02 +0200
commit329b84e42e3ee348b114fd0bfe4b2421e6139257 (patch)
tree95fefceaf95025c4f06b0bce21bb49c4b34b3f6e /arch/x86/kernel
parent9694d4afc1ebe1e46cacfb78b107cd8f9fb550ba (diff)
downloadop-kernel-dev-329b84e42e3ee348b114fd0bfe4b2421e6139257.zip
op-kernel-dev-329b84e42e3ee348b114fd0bfe4b2421e6139257.tar.gz
x86: Move uv to platform
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mike Travis <travis@sgi.com>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/Makefile1
-rw-r--r--arch/x86/kernel/bios_uv.c215
-rw-r--r--arch/x86/kernel/tlb_uv.c1661
-rw-r--r--arch/x86/kernel/uv_irq.c285
-rw-r--r--arch/x86/kernel/uv_sysfs.c76
-rw-r--r--arch/x86/kernel/uv_time.c423
6 files changed, 0 insertions, 2661 deletions
diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
index 4e1f862..08e2e4b 100644
--- a/arch/x86/kernel/Makefile
+++ b/arch/x86/kernel/Makefile
@@ -117,7 +117,6 @@ obj-$(CONFIG_SWIOTLB) += pci-swiotlb.o
###
# 64 bit specific files
ifeq ($(CONFIG_X86_64),y)
- obj-$(CONFIG_X86_UV) += tlb_uv.o bios_uv.o uv_irq.o uv_sysfs.o uv_time.o
obj-$(CONFIG_AUDIT) += audit_64.o
obj-$(CONFIG_GART_IOMMU) += pci-gart_64.o aperture_64.o
diff --git a/arch/x86/kernel/bios_uv.c b/arch/x86/kernel/bios_uv.c
deleted file mode 100644
index 8bc57ba..0000000
--- a/arch/x86/kernel/bios_uv.c
+++ /dev/null
@@ -1,215 +0,0 @@
-/*
- * BIOS run time interface routines.
- *
- * 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
- *
- * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved.
- * Copyright (c) Russ Anderson <rja@sgi.com>
- */
-
-#include <linux/efi.h>
-#include <asm/efi.h>
-#include <linux/io.h>
-#include <asm/uv/bios.h>
-#include <asm/uv/uv_hub.h>
-
-static struct uv_systab uv_systab;
-
-s64 uv_bios_call(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3, u64 a4, u64 a5)
-{
- struct uv_systab *tab = &uv_systab;
- s64 ret;
-
- if (!tab->function)
- /*
- * BIOS does not support UV systab
- */
- return BIOS_STATUS_UNIMPLEMENTED;
-
- ret = efi_call6((void *)__va(tab->function), (u64)which,
- a1, a2, a3, a4, a5);
- return ret;
-}
-EXPORT_SYMBOL_GPL(uv_bios_call);
-
-s64 uv_bios_call_irqsave(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
- u64 a4, u64 a5)
-{
- unsigned long bios_flags;
- s64 ret;
-
- local_irq_save(bios_flags);
- ret = uv_bios_call(which, a1, a2, a3, a4, a5);
- local_irq_restore(bios_flags);
-
- return ret;
-}
-
-s64 uv_bios_call_reentrant(enum uv_bios_cmd which, u64 a1, u64 a2, u64 a3,
- u64 a4, u64 a5)
-{
- s64 ret;
-
- preempt_disable();
- ret = uv_bios_call(which, a1, a2, a3, a4, a5);
- preempt_enable();
-
- return ret;
-}
-
-
-long sn_partition_id;
-EXPORT_SYMBOL_GPL(sn_partition_id);
-long sn_coherency_id;
-EXPORT_SYMBOL_GPL(sn_coherency_id);
-long sn_region_size;
-EXPORT_SYMBOL_GPL(sn_region_size);
-long system_serial_number;
-EXPORT_SYMBOL_GPL(system_serial_number);
-int uv_type;
-EXPORT_SYMBOL_GPL(uv_type);
-
-
-s64 uv_bios_get_sn_info(int fc, int *uvtype, long *partid, long *coher,
- long *region, long *ssn)
-{
- s64 ret;
- u64 v0, v1;
- union partition_info_u part;
-
- ret = uv_bios_call_irqsave(UV_BIOS_GET_SN_INFO, fc,
- (u64)(&v0), (u64)(&v1), 0, 0);
- if (ret != BIOS_STATUS_SUCCESS)
- return ret;
-
- part.val = v0;
- if (uvtype)
- *uvtype = part.hub_version;
- if (partid)
- *partid = part.partition_id;
- if (coher)
- *coher = part.coherence_id;
- if (region)
- *region = part.region_size;
- if (ssn)
- *ssn = v1;
- return ret;
-}
-EXPORT_SYMBOL_GPL(uv_bios_get_sn_info);
-
-int
-uv_bios_mq_watchlist_alloc(unsigned long addr, unsigned int mq_size,
- unsigned long *intr_mmr_offset)
-{
- u64 watchlist;
- s64 ret;
-
- /*
- * bios returns watchlist number or negative error number.
- */
- ret = (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_ALLOC, addr,
- mq_size, (u64)intr_mmr_offset,
- (u64)&watchlist, 0);
- if (ret < BIOS_STATUS_SUCCESS)
- return ret;
-
- return watchlist;
-}
-EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_alloc);
-
-int
-uv_bios_mq_watchlist_free(int blade, int watchlist_num)
-{
- return (int)uv_bios_call_irqsave(UV_BIOS_WATCHLIST_FREE,
- blade, watchlist_num, 0, 0, 0);
-}
-EXPORT_SYMBOL_GPL(uv_bios_mq_watchlist_free);
-
-s64
-uv_bios_change_memprotect(u64 paddr, u64 len, enum uv_memprotect perms)
-{
- return uv_bios_call_irqsave(UV_BIOS_MEMPROTECT, paddr, len,
- perms, 0, 0);
-}
-EXPORT_SYMBOL_GPL(uv_bios_change_memprotect);
-
-s64
-uv_bios_reserved_page_pa(u64 buf, u64 *cookie, u64 *addr, u64 *len)
-{
- s64 ret;
-
- ret = uv_bios_call_irqsave(UV_BIOS_GET_PARTITION_ADDR, (u64)cookie,
- (u64)addr, buf, (u64)len, 0);
- return ret;
-}
-EXPORT_SYMBOL_GPL(uv_bios_reserved_page_pa);
-
-s64 uv_bios_freq_base(u64 clock_type, u64 *ticks_per_second)
-{
- return uv_bios_call(UV_BIOS_FREQ_BASE, clock_type,
- (u64)ticks_per_second, 0, 0, 0);
-}
-EXPORT_SYMBOL_GPL(uv_bios_freq_base);
-
-/*
- * uv_bios_set_legacy_vga_target - Set Legacy VGA I/O Target
- * @decode: true to enable target, false to disable target
- * @domain: PCI domain number
- * @bus: PCI bus number
- *
- * Returns:
- * 0: Success
- * -EINVAL: Invalid domain or bus number
- * -ENOSYS: Capability not available
- * -EBUSY: Legacy VGA I/O cannot be retargeted at this time
- */
-int uv_bios_set_legacy_vga_target(bool decode, int domain, int bus)
-{
- return uv_bios_call(UV_BIOS_SET_LEGACY_VGA_TARGET,
- (u64)decode, (u64)domain, (u64)bus, 0, 0);
-}
-EXPORT_SYMBOL_GPL(uv_bios_set_legacy_vga_target);
-
-
-#ifdef CONFIG_EFI
-void uv_bios_init(void)
-{
- struct uv_systab *tab;
-
- if ((efi.uv_systab == EFI_INVALID_TABLE_ADDR) ||
- (efi.uv_systab == (unsigned long)NULL)) {
- printk(KERN_CRIT "No EFI UV System Table.\n");
- uv_systab.function = (unsigned long)NULL;
- return;
- }
-
- tab = (struct uv_systab *)ioremap(efi.uv_systab,
- sizeof(struct uv_systab));
- if (strncmp(tab->signature, "UVST", 4) != 0)
- printk(KERN_ERR "bad signature in UV system table!");
-
- /*
- * Copy table to permanent spot for later use.
- */
- memcpy(&uv_systab, tab, sizeof(struct uv_systab));
- iounmap(tab);
-
- printk(KERN_INFO "EFI UV System Table Revision %d\n",
- uv_systab.revision);
-}
-#else /* !CONFIG_EFI */
-
-void uv_bios_init(void) { }
-#endif
diff --git a/arch/x86/kernel/tlb_uv.c b/arch/x86/kernel/tlb_uv.c
deleted file mode 100644
index 20ea20a..0000000
--- a/arch/x86/kernel/tlb_uv.c
+++ /dev/null
@@ -1,1661 +0,0 @@
-/*
- * SGI UltraViolet TLB flush routines.
- *
- * (c) 2008-2010 Cliff Wickman <cpw@sgi.com>, SGI.
- *
- * This code is released under the GNU General Public License version 2 or
- * later.
- */
-#include <linux/seq_file.h>
-#include <linux/proc_fs.h>
-#include <linux/debugfs.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-
-#include <asm/mmu_context.h>
-#include <asm/uv/uv.h>
-#include <asm/uv/uv_mmrs.h>
-#include <asm/uv/uv_hub.h>
-#include <asm/uv/uv_bau.h>
-#include <asm/apic.h>
-#include <asm/idle.h>
-#include <asm/tsc.h>
-#include <asm/irq_vectors.h>
-#include <asm/timer.h>
-
-/* timeouts in nanoseconds (indexed by UVH_AGING_PRESCALE_SEL urgency7 30:28) */
-static int timeout_base_ns[] = {
- 20,
- 160,
- 1280,
- 10240,
- 81920,
- 655360,
- 5242880,
- 167772160
-};
-static int timeout_us;
-static int nobau;
-static int baudisabled;
-static spinlock_t disable_lock;
-static cycles_t congested_cycles;
-
-/* tunables: */
-static int max_bau_concurrent = MAX_BAU_CONCURRENT;
-static int max_bau_concurrent_constant = MAX_BAU_CONCURRENT;
-static int plugged_delay = PLUGGED_DELAY;
-static int plugsb4reset = PLUGSB4RESET;
-static int timeoutsb4reset = TIMEOUTSB4RESET;
-static int ipi_reset_limit = IPI_RESET_LIMIT;
-static int complete_threshold = COMPLETE_THRESHOLD;
-static int congested_response_us = CONGESTED_RESPONSE_US;
-static int congested_reps = CONGESTED_REPS;
-static int congested_period = CONGESTED_PERIOD;
-static struct dentry *tunables_dir;
-static struct dentry *tunables_file;
-
-static int __init setup_nobau(char *arg)
-{
- nobau = 1;
- return 0;
-}
-early_param("nobau", setup_nobau);
-
-/* base pnode in this partition */
-static int uv_partition_base_pnode __read_mostly;
-/* position of pnode (which is nasid>>1): */
-static int uv_nshift __read_mostly;
-static unsigned long uv_mmask __read_mostly;
-
-static DEFINE_PER_CPU(struct ptc_stats, ptcstats);
-static DEFINE_PER_CPU(struct bau_control, bau_control);
-static DEFINE_PER_CPU(cpumask_var_t, uv_flush_tlb_mask);
-
-/*
- * Determine the first node on a uvhub. 'Nodes' are used for kernel
- * memory allocation.
- */
-static int __init uvhub_to_first_node(int uvhub)
-{
- int node, b;
-
- for_each_online_node(node) {
- b = uv_node_to_blade_id(node);
- if (uvhub == b)
- return node;
- }
- return -1;
-}
-
-/*
- * Determine the apicid of the first cpu on a uvhub.
- */
-static int __init uvhub_to_first_apicid(int uvhub)
-{
- int cpu;
-
- for_each_present_cpu(cpu)
- if (uvhub == uv_cpu_to_blade_id(cpu))
- return per_cpu(x86_cpu_to_apicid, cpu);
- return -1;
-}
-
-/*
- * Free a software acknowledge hardware resource by clearing its Pending
- * bit. This will return a reply to the sender.
- * If the message has timed out, a reply has already been sent by the
- * hardware but the resource has not been released. In that case our
- * clear of the Timeout bit (as well) will free the resource. No reply will
- * be sent (the hardware will only do one reply per message).
- */
-static inline void uv_reply_to_message(struct msg_desc *mdp,
- struct bau_control *bcp)
-{
- unsigned long dw;
- struct bau_payload_queue_entry *msg;
-
- msg = mdp->msg;
- if (!msg->canceled) {
- dw = (msg->sw_ack_vector << UV_SW_ACK_NPENDING) |
- msg->sw_ack_vector;
- uv_write_local_mmr(
- UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS, dw);
- }
- msg->replied_to = 1;
- msg->sw_ack_vector = 0;
-}
-
-/*
- * Process the receipt of a RETRY message
- */
-static inline void uv_bau_process_retry_msg(struct msg_desc *mdp,
- struct bau_control *bcp)
-{
- int i;
- int cancel_count = 0;
- int slot2;
- unsigned long msg_res;
- unsigned long mmr = 0;
- struct bau_payload_queue_entry *msg;
- struct bau_payload_queue_entry *msg2;
- struct ptc_stats *stat;
-
- msg = mdp->msg;
- stat = bcp->statp;
- stat->d_retries++;
- /*
- * cancel any message from msg+1 to the retry itself
- */
- for (msg2 = msg+1, i = 0; i < DEST_Q_SIZE; msg2++, i++) {
- if (msg2 > mdp->va_queue_last)
- msg2 = mdp->va_queue_first;
- if (msg2 == msg)
- break;
-
- /* same conditions for cancellation as uv_do_reset */
- if ((msg2->replied_to == 0) && (msg2->canceled == 0) &&
- (msg2->sw_ack_vector) && ((msg2->sw_ack_vector &
- msg->sw_ack_vector) == 0) &&
- (msg2->sending_cpu == msg->sending_cpu) &&
- (msg2->msg_type != MSG_NOOP)) {
- slot2 = msg2 - mdp->va_queue_first;
- mmr = uv_read_local_mmr
- (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
- msg_res = msg2->sw_ack_vector;
- /*
- * This is a message retry; clear the resources held
- * by the previous message only if they timed out.
- * If it has not timed out we have an unexpected
- * situation to report.
- */
- if (mmr & (msg_res << UV_SW_ACK_NPENDING)) {
- /*
- * is the resource timed out?
- * make everyone ignore the cancelled message.
- */
- msg2->canceled = 1;
- stat->d_canceled++;
- cancel_count++;
- uv_write_local_mmr(
- UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS,
- (msg_res << UV_SW_ACK_NPENDING) |
- msg_res);
- }
- }
- }
- if (!cancel_count)
- stat->d_nocanceled++;
-}
-
-/*
- * Do all the things a cpu should do for a TLB shootdown message.
- * Other cpu's may come here at the same time for this message.
- */
-static void uv_bau_process_message(struct msg_desc *mdp,
- struct bau_control *bcp)
-{
- int msg_ack_count;
- short socket_ack_count = 0;
- struct ptc_stats *stat;
- struct bau_payload_queue_entry *msg;
- struct bau_control *smaster = bcp->socket_master;
-
- /*
- * This must be a normal message, or retry of a normal message
- */
- msg = mdp->msg;
- stat = bcp->statp;
- if (msg->address == TLB_FLUSH_ALL) {
- local_flush_tlb();
- stat->d_alltlb++;
- } else {
- __flush_tlb_one(msg->address);
- stat->d_onetlb++;
- }
- stat->d_requestee++;
-
- /*
- * One cpu on each uvhub has the additional job on a RETRY
- * of releasing the resource held by the message that is
- * being retried. That message is identified by sending
- * cpu number.
- */
- if (msg->msg_type == MSG_RETRY && bcp == bcp->uvhub_master)
- uv_bau_process_retry_msg(mdp, bcp);
-
- /*
- * This is a sw_ack message, so we have to reply to it.
- * Count each responding cpu on the socket. This avoids
- * pinging the count's cache line back and forth between
- * the sockets.
- */
- socket_ack_count = atomic_add_short_return(1, (struct atomic_short *)
- &smaster->socket_acknowledge_count[mdp->msg_slot]);
- if (socket_ack_count == bcp->cpus_in_socket) {
- /*
- * Both sockets dump their completed count total into
- * the message's count.
- */
- smaster->socket_acknowledge_count[mdp->msg_slot] = 0;
- msg_ack_count = atomic_add_short_return(socket_ack_count,
- (struct atomic_short *)&msg->acknowledge_count);
-
- if (msg_ack_count == bcp->cpus_in_uvhub) {
- /*
- * All cpus in uvhub saw it; reply
- */
- uv_reply_to_message(mdp, bcp);
- }
- }
-
- return;
-}
-
-/*
- * Determine the first cpu on a uvhub.
- */
-static int uvhub_to_first_cpu(int uvhub)
-{
- int cpu;
- for_each_present_cpu(cpu)
- if (uvhub == uv_cpu_to_blade_id(cpu))
- return cpu;
- return -1;
-}
-
-/*
- * Last resort when we get a large number of destination timeouts is
- * to clear resources held by a given cpu.
- * Do this with IPI so that all messages in the BAU message queue
- * can be identified by their nonzero sw_ack_vector field.
- *
- * This is entered for a single cpu on the uvhub.
- * The sender want's this uvhub to free a specific message's
- * sw_ack resources.
- */
-static void
-uv_do_reset(void *ptr)
-{
- int i;
- int slot;
- int count = 0;
- unsigned long mmr;
- unsigned long msg_res;
- struct bau_control *bcp;
- struct reset_args *rap;
- struct bau_payload_queue_entry *msg;
- struct ptc_stats *stat;
-
- bcp = &per_cpu(bau_control, smp_processor_id());
- rap = (struct reset_args *)ptr;
- stat = bcp->statp;
- stat->d_resets++;
-
- /*
- * We're looking for the given sender, and
- * will free its sw_ack resource.
- * If all cpu's finally responded after the timeout, its
- * message 'replied_to' was set.
- */
- for (msg = bcp->va_queue_first, i = 0; i < DEST_Q_SIZE; msg++, i++) {
- /* uv_do_reset: same conditions for cancellation as
- uv_bau_process_retry_msg() */
- if ((msg->replied_to == 0) &&
- (msg->canceled == 0) &&
- (msg->sending_cpu == rap->sender) &&
- (msg->sw_ack_vector) &&
- (msg->msg_type != MSG_NOOP)) {
- /*
- * make everyone else ignore this message
- */
- msg->canceled = 1;
- slot = msg - bcp->va_queue_first;
- count++;
- /*
- * only reset the resource if it is still pending
- */
- mmr = uv_read_local_mmr
- (UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE);
- msg_res = msg->sw_ack_vector;
- if (mmr & msg_res) {
- stat->d_rcanceled++;
- uv_write_local_mmr(
- UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE_ALIAS,
- (msg_res << UV_SW_ACK_NPENDING) |
- msg_res);
- }
- }
- }
- return;
-}
-
-/*
- * Use IPI to get all target uvhubs to release resources held by
- * a given sending cpu number.
- */
-static void uv_reset_with_ipi(struct bau_target_uvhubmask *distribution,
- int sender)
-{
- int uvhub;
- int cpu;
- cpumask_t mask;
- struct reset_args reset_args;
-
- reset_args.sender = sender;
-
- cpus_clear(mask);
- /* find a single cpu for each uvhub in this distribution mask */
- for (uvhub = 0;
- uvhub < sizeof(struct bau_target_uvhubmask) * BITSPERBYTE;
- uvhub++) {
- if (!bau_uvhub_isset(uvhub, distribution))
- continue;
- /* find a cpu for this uvhub */
- cpu = uvhub_to_first_cpu(uvhub);
- cpu_set(cpu, mask);
- }
- /* IPI all cpus; Preemption is already disabled */
- smp_call_function_many(&mask, uv_do_reset, (void *)&reset_args, 1);
- return;
-}
-
-static inline unsigned long
-cycles_2_us(unsigned long long cyc)
-{
- unsigned long long ns;
- unsigned long us;
- ns = (cyc * per_cpu(cyc2ns, smp_processor_id()))
- >> CYC2NS_SCALE_FACTOR;
- us = ns / 1000;
- return us;
-}
-
-/*
- * wait for all cpus on this hub to finish their sends and go quiet
- * leaves uvhub_quiesce set so that no new broadcasts are started by
- * bau_flush_send_and_wait()
- */
-static inline void
-quiesce_local_uvhub(struct bau_control *hmaster)
-{
- atomic_add_short_return(1, (struct atomic_short *)
- &hmaster->uvhub_quiesce);
-}
-
-/*
- * mark this quiet-requestor as done
- */
-static inline void
-end_uvhub_quiesce(struct bau_control *hmaster)
-{
- atomic_add_short_return(-1, (struct atomic_short *)
- &hmaster->uvhub_quiesce);
-}
-
-/*
- * Wait for completion of a broadcast software ack message
- * return COMPLETE, RETRY(PLUGGED or TIMEOUT) or GIVEUP
- */
-static int uv_wait_completion(struct bau_desc *bau_desc,
- unsigned long mmr_offset, int right_shift, int this_cpu,
- struct bau_control *bcp, struct bau_control *smaster, long try)
-{
- unsigned long descriptor_status;
- cycles_t ttime;
- struct ptc_stats *stat = bcp->statp;
- struct bau_control *hmaster;
-
- hmaster = bcp->uvhub_master;
-
- /* spin on the status MMR, waiting for it to go idle */
- while ((descriptor_status = (((unsigned long)
- uv_read_local_mmr(mmr_offset) >>
- right_shift) & UV_ACT_STATUS_MASK)) !=
- DESC_STATUS_IDLE) {
- /*
- * Our software ack messages may be blocked because there are
- * no swack resources available. As long as none of them
- * has timed out hardware will NACK our message and its
- * state will stay IDLE.
- */
- if (descriptor_status == DESC_STATUS_SOURCE_TIMEOUT) {
- stat->s_stimeout++;
- return FLUSH_GIVEUP;
- } else if (descriptor_status ==
- DESC_STATUS_DESTINATION_TIMEOUT) {
- stat->s_dtimeout++;
- ttime = get_cycles();
-
- /*
- * Our retries may be blocked by all destination
- * swack resources being consumed, and a timeout
- * pending. In that case hardware returns the
- * ERROR that looks like a destination timeout.
- */
- if (cycles_2_us(ttime - bcp->send_message) <
- timeout_us) {
- bcp->conseccompletes = 0;
- return FLUSH_RETRY_PLUGGED;
- }
-
- bcp->conseccompletes = 0;
- return FLUSH_RETRY_TIMEOUT;
- } else {
- /*
- * descriptor_status is still BUSY
- */
- cpu_relax();
- }
- }
- bcp->conseccompletes++;
- return FLUSH_COMPLETE;
-}
-
-static inline cycles_t
-sec_2_cycles(unsigned long sec)
-{
- unsigned long ns;
- cycles_t cyc;
-
- ns = sec * 1000000000;
- cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id()));
- return cyc;
-}
-
-/*
- * conditionally add 1 to *v, unless *v is >= u
- * return 0 if we cannot add 1 to *v because it is >= u
- * return 1 if we can add 1 to *v because it is < u
- * the add is atomic
- *
- * This is close to atomic_add_unless(), but this allows the 'u' value
- * to be lowered below the current 'v'. atomic_add_unless can only stop
- * on equal.
- */
-static inline int atomic_inc_unless_ge(spinlock_t *lock, atomic_t *v, int u)
-{
- spin_lock(lock);
- if (atomic_read(v) >= u) {
- spin_unlock(lock);
- return 0;
- }
- atomic_inc(v);
- spin_unlock(lock);
- return 1;
-}
-
-/*
- * Our retries are blocked by all destination swack resources being
- * in use, and a timeout is pending. In that case hardware immediately
- * returns the ERROR that looks like a destination timeout.
- */
-static void
-destination_plugged(struct bau_desc *bau_desc, struct bau_control *bcp,
- struct bau_control *hmaster, struct ptc_stats *stat)
-{
- udelay(bcp->plugged_delay);
- bcp->plugged_tries++;
- if (bcp->plugged_tries >= bcp->plugsb4reset) {
- bcp->plugged_tries = 0;
- quiesce_local_uvhub(hmaster);
- spin_lock(&hmaster->queue_lock);
- uv_reset_with_ipi(&bau_desc->distribution, bcp->cpu);
- spin_unlock(&hmaster->queue_lock);
- end_uvhub_quiesce(hmaster);
- bcp->ipi_attempts++;
- stat->s_resets_plug++;
- }
-}
-
-static void
-destination_timeout(struct bau_desc *bau_desc, struct bau_control *bcp,
- struct bau_control *hmaster, struct ptc_stats *stat)
-{
- hmaster->max_bau_concurrent = 1;
- bcp->timeout_tries++;
- if (bcp->timeout_tries >= bcp->timeoutsb4reset) {
- bcp->timeout_tries = 0;
- quiesce_local_uvhub(hmaster);
- spin_lock(&hmaster->queue_lock);
- uv_reset_with_ipi(&bau_desc->distribution, bcp->cpu);
- spin_unlock(&hmaster->queue_lock);
- end_uvhub_quiesce(hmaster);
- bcp->ipi_attempts++;
- stat->s_resets_timeout++;
- }
-}
-
-/*
- * Completions are taking a very long time due to a congested numalink
- * network.
- */
-static void
-disable_for_congestion(struct bau_control *bcp, struct ptc_stats *stat)
-{
- int tcpu;
- struct bau_control *tbcp;
-
- /* let only one cpu do this disabling */
- spin_lock(&disable_lock);
- if (!baudisabled && bcp->period_requests &&
- ((bcp->period_time / bcp->period_requests) > congested_cycles)) {
- /* it becomes this cpu's job to turn on the use of the
- BAU again */
- baudisabled = 1;
- bcp->set_bau_off = 1;
- bcp->set_bau_on_time = get_cycles() +
- sec_2_cycles(bcp->congested_period);
- stat->s_bau_disabled++;
- for_each_present_cpu(tcpu) {
- tbcp = &per_cpu(bau_control, tcpu);
- tbcp->baudisabled = 1;
- }
- }
- spin_unlock(&disable_lock);
-}
-
-/**
- * uv_flush_send_and_wait
- *
- * Send a broadcast and wait for it to complete.
- *
- * The flush_mask contains the cpus the broadcast is to be sent to including
- * cpus that are on the local uvhub.
- *
- * Returns 0 if all flushing represented in the mask was done.
- * Returns 1 if it gives up entirely and the original cpu mask is to be
- * returned to the kernel.
- */
-int uv_flush_send_and_wait(struct bau_desc *bau_desc,
- struct cpumask *flush_mask, struct bau_control *bcp)
-{
- int right_shift;
- int completion_status = 0;
- int seq_number = 0;
- long try = 0;
- int cpu = bcp->uvhub_cpu;
- int this_cpu = bcp->cpu;
- unsigned long mmr_offset;
- unsigned long index;
- cycles_t time1;
- cycles_t time2;
- cycles_t elapsed;
- struct ptc_stats *stat = bcp->statp;
- struct bau_control *smaster = bcp->socket_master;
- struct bau_control *hmaster = bcp->uvhub_master;
-
- if (!atomic_inc_unless_ge(&hmaster->uvhub_lock,
- &hmaster->active_descriptor_count,
- hmaster->max_bau_concurrent)) {
- stat->s_throttles++;
- do {
- cpu_relax();
- } while (!atomic_inc_unless_ge(&hmaster->uvhub_lock,
- &hmaster->active_descriptor_count,
- hmaster->max_bau_concurrent));
- }
- while (hmaster->uvhub_quiesce)
- cpu_relax();
-
- if (cpu < UV_CPUS_PER_ACT_STATUS) {
- mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_0;
- right_shift = cpu * UV_ACT_STATUS_SIZE;
- } else {
- mmr_offset = UVH_LB_BAU_SB_ACTIVATION_STATUS_1;
- right_shift =
- ((cpu - UV_CPUS_PER_ACT_STATUS) * UV_ACT_STATUS_SIZE);
- }
- time1 = get_cycles();
- do {
- if (try == 0) {
- bau_desc->header.msg_type = MSG_REGULAR;
- seq_number = bcp->message_number++;
- } else {
- bau_desc->header.msg_type = MSG_RETRY;
- stat->s_retry_messages++;
- }
- bau_desc->header.sequence = seq_number;
- index = (1UL << UVH_LB_BAU_SB_ACTIVATION_CONTROL_PUSH_SHFT) |
- bcp->uvhub_cpu;
- bcp->send_message = get_cycles();
- uv_write_local_mmr(UVH_LB_BAU_SB_ACTIVATION_CONTROL, index);
- try++;
- completion_status = uv_wait_completion(bau_desc, mmr_offset,
- right_shift, this_cpu, bcp, smaster, try);
-
- if (completion_status == FLUSH_RETRY_PLUGGED) {
- destination_plugged(bau_desc, bcp, hmaster, stat);
- } else if (completion_status == FLUSH_RETRY_TIMEOUT) {
- destination_timeout(bau_desc, bcp, hmaster, stat);
- }
- if (bcp->ipi_attempts >= bcp->ipi_reset_limit) {
- bcp->ipi_attempts = 0;
- completion_status = FLUSH_GIVEUP;
- break;
- }
- cpu_relax();
- } while ((completion_status == FLUSH_RETRY_PLUGGED) ||
- (completion_status == FLUSH_RETRY_TIMEOUT));
- time2 = get_cycles();
- bcp->plugged_tries = 0;
- bcp->timeout_tries = 0;
- if ((completion_status == FLUSH_COMPLETE) &&
- (bcp->conseccompletes > bcp->complete_threshold) &&
- (hmaster->max_bau_concurrent <
- hmaster->max_bau_concurrent_constant))
- hmaster->max_bau_concurrent++;
- while (hmaster->uvhub_quiesce)
- cpu_relax();
- atomic_dec(&hmaster->active_descriptor_count);
- if (time2 > time1) {
- elapsed = time2 - time1;
- stat->s_time += elapsed;
- if ((completion_status == FLUSH_COMPLETE) && (try == 1)) {
- bcp->period_requests++;
- bcp->period_time += elapsed;
- if ((elapsed > congested_cycles) &&
- (bcp->period_requests > bcp->congested_reps)) {
- disable_for_congestion(bcp, stat);
- }
- }
- } else
- stat->s_requestor--;
- if (completion_status == FLUSH_COMPLETE && try > 1)
- stat->s_retriesok++;
- else if (completion_status == FLUSH_GIVEUP) {
- stat->s_giveup++;
- return 1;
- }
- return 0;
-}
-
-/**
- * uv_flush_tlb_others - globally purge translation cache of a virtual
- * address or all TLB's
- * @cpumask: mask of all cpu's in which the address is to be removed
- * @mm: mm_struct containing virtual address range
- * @va: virtual address to be removed (or TLB_FLUSH_ALL for all TLB's on cpu)
- * @cpu: the current cpu
- *
- * This is the entry point for initiating any UV global TLB shootdown.
- *
- * Purges the translation caches of all specified processors of the given
- * virtual address, or purges all TLB's on specified processors.
- *
- * The caller has derived the cpumask from the mm_struct. This function
- * is called only if there are bits set in the mask. (e.g. flush_tlb_page())
- *
- * The cpumask is converted into a uvhubmask of the uvhubs containing
- * those cpus.
- *
- * Note that this function should be called with preemption disabled.
- *
- * Returns NULL if all remote flushing was done.
- * Returns pointer to cpumask if some remote flushing remains to be
- * done. The returned pointer is valid till preemption is re-enabled.
- */
-const struct cpumask *uv_flush_tlb_others(const struct cpumask *cpumask,
- struct mm_struct *mm,
- unsigned long va, unsigned int cpu)
-{
- int tcpu;
- int uvhub;
- int locals = 0;
- int remotes = 0;
- int hubs = 0;
- struct bau_desc *bau_desc;
- struct cpumask *flush_mask;
- struct ptc_stats *stat;
- struct bau_control *bcp;
- struct bau_control *tbcp;
-
- /* kernel was booted 'nobau' */
- if (nobau)
- return cpumask;
-
- bcp = &per_cpu(bau_control, cpu);
- stat = bcp->statp;
-
- /* bau was disabled due to slow response */
- if (bcp->baudisabled) {
- /* the cpu that disabled it must re-enable it */
- if (bcp->set_bau_off) {
- if (get_cycles() >= bcp->set_bau_on_time) {
- stat->s_bau_reenabled++;
- baudisabled = 0;
- for_each_present_cpu(tcpu) {
- tbcp = &per_cpu(bau_control, tcpu);
- tbcp->baudisabled = 0;
- tbcp->period_requests = 0;
- tbcp->period_time = 0;
- }
- }
- }
- return cpumask;
- }
-
- /*
- * Each sending cpu has a per-cpu mask which it fills from the caller's
- * cpu mask. All cpus are converted to uvhubs and copied to the
- * activation descriptor.
- */
- flush_mask = (struct cpumask *)per_cpu(uv_flush_tlb_mask, cpu);
- /* don't actually do a shootdown of the local cpu */
- cpumask_andnot(flush_mask, cpumask, cpumask_of(cpu));
- if (cpu_isset(cpu, *cpumask))
- stat->s_ntargself++;
-
- bau_desc = bcp->descriptor_base;
- bau_desc += UV_ITEMS_PER_DESCRIPTOR * bcp->uvhub_cpu;
- bau_uvhubs_clear(&bau_desc->distribution, UV_DISTRIBUTION_SIZE);
-
- /* cpu statistics */
- for_each_cpu(tcpu, flush_mask) {
- uvhub = uv_cpu_to_blade_id(tcpu);
- bau_uvhub_set(uvhub, &bau_desc->distribution);
- if (uvhub == bcp->uvhub)
- locals++;
- else
- remotes++;
- }
- if ((locals + remotes) == 0)
- return NULL;
- stat->s_requestor++;
- stat->s_ntargcpu += remotes + locals;
- stat->s_ntargremotes += remotes;
- stat->s_ntarglocals += locals;
- remotes = bau_uvhub_weight(&bau_desc->distribution);
-
- /* uvhub statistics */
- hubs = bau_uvhub_weight(&bau_desc->distribution);
- if (locals) {
- stat->s_ntarglocaluvhub++;
- stat->s_ntargremoteuvhub += (hubs - 1);
- } else
- stat->s_ntargremoteuvhub += hubs;
- stat->s_ntarguvhub += hubs;
- if (hubs >= 16)
- stat->s_ntarguvhub16++;
- else if (hubs >= 8)
- stat->s_ntarguvhub8++;
- else if (hubs >= 4)
- stat->s_ntarguvhub4++;
- else if (hubs >= 2)
- stat->s_ntarguvhub2++;
- else
- stat->s_ntarguvhub1++;
-
- bau_desc->payload.address = va;
- bau_desc->payload.sending_cpu = cpu;
-
- /*
- * uv_flush_send_and_wait returns 0 if all cpu's were messaged,
- * or 1 if it gave up and the original cpumask should be returned.
- */
- if (!uv_flush_send_and_wait(bau_desc, flush_mask, bcp))
- return NULL;
- else
- return cpumask;
-}
-
-/*
- * The BAU message interrupt comes here. (registered by set_intr_gate)
- * See entry_64.S
- *
- * We received a broadcast assist message.
- *
- * Interrupts are disabled; this interrupt could represent
- * the receipt of several messages.
- *
- * All cores/threads on this hub get this interrupt.
- * The last one to see it does the software ack.
- * (the resource will not be freed until noninterruptable cpus see this
- * interrupt; hardware may timeout the s/w ack and reply ERROR)
- */
-void uv_bau_message_interrupt(struct pt_regs *regs)
-{
- int count = 0;
- cycles_t time_start;
- struct bau_payload_queue_entry *msg;
- struct bau_control *bcp;
- struct ptc_stats *stat;
- struct msg_desc msgdesc;
-
- time_start = get_cycles();
- bcp = &per_cpu(bau_control, smp_processor_id());
- stat = bcp->statp;
- msgdesc.va_queue_first = bcp->va_queue_first;
- msgdesc.va_queue_last = bcp->va_queue_last;
- msg = bcp->bau_msg_head;
- while (msg->sw_ack_vector) {
- count++;
- msgdesc.msg_slot = msg - msgdesc.va_queue_first;
- msgdesc.sw_ack_slot = ffs(msg->sw_ack_vector) - 1;
- msgdesc.msg = msg;
- uv_bau_process_message(&msgdesc, bcp);
- msg++;
- if (msg > msgdesc.va_queue_last)
- msg = msgdesc.va_queue_first;
- bcp->bau_msg_head = msg;
- }
- stat->d_time += (get_cycles() - time_start);
- if (!count)
- stat->d_nomsg++;
- else if (count > 1)
- stat->d_multmsg++;
- ack_APIC_irq();
-}
-
-/*
- * uv_enable_timeouts
- *
- * Each target uvhub (i.e. a uvhub that has no cpu's) needs to have
- * shootdown message timeouts enabled. The timeout does not cause
- * an interrupt, but causes an error message to be returned to
- * the sender.
- */
-static void uv_enable_timeouts(void)
-{
- int uvhub;
- int nuvhubs;
- int pnode;
- unsigned long mmr_image;
-
- nuvhubs = uv_num_possible_blades();
-
- for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
- if (!uv_blade_nr_possible_cpus(uvhub))
- continue;
-
- pnode = uv_blade_to_pnode(uvhub);
- mmr_image =
- uv_read_global_mmr64(pnode, UVH_LB_BAU_MISC_CONTROL);
- /*
- * Set the timeout period and then lock it in, in three
- * steps; captures and locks in the period.
- *
- * To program the period, the SOFT_ACK_MODE must be off.
- */
- mmr_image &= ~((unsigned long)1 <<
- UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT);
- uv_write_global_mmr64
- (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
- /*
- * Set the 4-bit period.
- */
- mmr_image &= ~((unsigned long)0xf <<
- UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT);
- mmr_image |= (UV_INTD_SOFT_ACK_TIMEOUT_PERIOD <<
- UVH_LB_BAU_MISC_CONTROL_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHFT);
- uv_write_global_mmr64
- (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
- /*
- * Subsequent reversals of the timebase bit (3) cause an
- * immediate timeout of one or all INTD resources as
- * indicated in bits 2:0 (7 causes all of them to timeout).
- */
- mmr_image |= ((unsigned long)1 <<
- UVH_LB_BAU_MISC_CONTROL_ENABLE_INTD_SOFT_ACK_MODE_SHFT);
- uv_write_global_mmr64
- (pnode, UVH_LB_BAU_MISC_CONTROL, mmr_image);
- }
-}
-
-static void *uv_ptc_seq_start(struct seq_file *file, loff_t *offset)
-{
- if (*offset < num_possible_cpus())
- return offset;
- return NULL;
-}
-
-static void *uv_ptc_seq_next(struct seq_file *file, void *data, loff_t *offset)
-{
- (*offset)++;
- if (*offset < num_possible_cpus())
- return offset;
- return NULL;
-}
-
-static void uv_ptc_seq_stop(struct seq_file *file, void *data)
-{
-}
-
-static inline unsigned long long
-microsec_2_cycles(unsigned long microsec)
-{
- unsigned long ns;
- unsigned long long cyc;
-
- ns = microsec * 1000;
- cyc = (ns << CYC2NS_SCALE_FACTOR)/(per_cpu(cyc2ns, smp_processor_id()));
- return cyc;
-}
-
-/*
- * Display the statistics thru /proc.
- * 'data' points to the cpu number
- */
-static int uv_ptc_seq_show(struct seq_file *file, void *data)
-{
- struct ptc_stats *stat;
- int cpu;
-
- cpu = *(loff_t *)data;
-
- if (!cpu) {
- seq_printf(file,
- "# cpu sent stime self locals remotes ncpus localhub ");
- seq_printf(file,
- "remotehub numuvhubs numuvhubs16 numuvhubs8 ");
- seq_printf(file,
- "numuvhubs4 numuvhubs2 numuvhubs1 dto ");
- seq_printf(file,
- "retries rok resetp resett giveup sto bz throt ");
- seq_printf(file,
- "sw_ack recv rtime all ");
- seq_printf(file,
- "one mult none retry canc nocan reset rcan ");
- seq_printf(file,
- "disable enable\n");
- }
- if (cpu < num_possible_cpus() && cpu_online(cpu)) {
- stat = &per_cpu(ptcstats, cpu);
- /* source side statistics */
- seq_printf(file,
- "cpu %d %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
- cpu, stat->s_requestor, cycles_2_us(stat->s_time),
- stat->s_ntargself, stat->s_ntarglocals,
- stat->s_ntargremotes, stat->s_ntargcpu,
- stat->s_ntarglocaluvhub, stat->s_ntargremoteuvhub,
- stat->s_ntarguvhub, stat->s_ntarguvhub16);
- seq_printf(file, "%ld %ld %ld %ld %ld ",
- stat->s_ntarguvhub8, stat->s_ntarguvhub4,
- stat->s_ntarguvhub2, stat->s_ntarguvhub1,
- stat->s_dtimeout);
- seq_printf(file, "%ld %ld %ld %ld %ld %ld %ld %ld ",
- stat->s_retry_messages, stat->s_retriesok,
- stat->s_resets_plug, stat->s_resets_timeout,
- stat->s_giveup, stat->s_stimeout,
- stat->s_busy, stat->s_throttles);
-
- /* destination side statistics */
- seq_printf(file,
- "%lx %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld %ld ",
- uv_read_global_mmr64(uv_cpu_to_pnode(cpu),
- UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE),
- stat->d_requestee, cycles_2_us(stat->d_time),
- stat->d_alltlb, stat->d_onetlb, stat->d_multmsg,
- stat->d_nomsg, stat->d_retries, stat->d_canceled,
- stat->d_nocanceled, stat->d_resets,
- stat->d_rcanceled);
- seq_printf(file, "%ld %ld\n",
- stat->s_bau_disabled, stat->s_bau_reenabled);
- }
-
- return 0;
-}
-
-/*
- * Display the tunables thru debugfs
- */
-static ssize_t tunables_read(struct file *file, char __user *userbuf,
- size_t count, loff_t *ppos)
-{
- char *buf;
- int ret;
-
- buf = kasprintf(GFP_KERNEL, "%s %s %s\n%d %d %d %d %d %d %d %d %d\n",
- "max_bau_concurrent plugged_delay plugsb4reset",
- "timeoutsb4reset ipi_reset_limit complete_threshold",
- "congested_response_us congested_reps congested_period",
- max_bau_concurrent, plugged_delay, plugsb4reset,
- timeoutsb4reset, ipi_reset_limit, complete_threshold,
- congested_response_us, congested_reps, congested_period);
-
- if (!buf)
- return -ENOMEM;
-
- ret = simple_read_from_buffer(userbuf, count, ppos, buf, strlen(buf));
- kfree(buf);
- return ret;
-}
-
-/*
- * -1: resetf the statistics
- * 0: display meaning of the statistics
- */
-static ssize_t uv_ptc_proc_write(struct file *file, const char __user *user,
- size_t count, loff_t *data)
-{
- int cpu;
- long input_arg;
- char optstr[64];
- struct ptc_stats *stat;
-
- if (count == 0 || count > sizeof(optstr))
- return -EINVAL;
- if (copy_from_user(optstr, user, count))
- return -EFAULT;
- optstr[count - 1] = '\0';
- if (strict_strtol(optstr, 10, &input_arg) < 0) {
- printk(KERN_DEBUG "%s is invalid\n", optstr);
- return -EINVAL;
- }
-
- if (input_arg == 0) {
- printk(KERN_DEBUG "# cpu: cpu number\n");
- printk(KERN_DEBUG "Sender statistics:\n");
- printk(KERN_DEBUG
- "sent: number of shootdown messages sent\n");
- printk(KERN_DEBUG
- "stime: time spent sending messages\n");
- printk(KERN_DEBUG
- "numuvhubs: number of hubs targeted with shootdown\n");
- printk(KERN_DEBUG
- "numuvhubs16: number times 16 or more hubs targeted\n");
- printk(KERN_DEBUG
- "numuvhubs8: number times 8 or more hubs targeted\n");
- printk(KERN_DEBUG
- "numuvhubs4: number times 4 or more hubs targeted\n");
- printk(KERN_DEBUG
- "numuvhubs2: number times 2 or more hubs targeted\n");
- printk(KERN_DEBUG
- "numuvhubs1: number times 1 hub targeted\n");
- printk(KERN_DEBUG
- "numcpus: number of cpus targeted with shootdown\n");
- printk(KERN_DEBUG
- "dto: number of destination timeouts\n");
- printk(KERN_DEBUG
- "retries: destination timeout retries sent\n");
- printk(KERN_DEBUG
- "rok: : destination timeouts successfully retried\n");
- printk(KERN_DEBUG
- "resetp: ipi-style resource resets for plugs\n");
- printk(KERN_DEBUG
- "resett: ipi-style resource resets for timeouts\n");
- printk(KERN_DEBUG
- "giveup: fall-backs to ipi-style shootdowns\n");
- printk(KERN_DEBUG
- "sto: number of source timeouts\n");
- printk(KERN_DEBUG
- "bz: number of stay-busy's\n");
- printk(KERN_DEBUG
- "throt: number times spun in throttle\n");
- printk(KERN_DEBUG "Destination side statistics:\n");
- printk(KERN_DEBUG
- "sw_ack: image of UVH_LB_BAU_INTD_SOFTWARE_ACKNOWLEDGE\n");
- printk(KERN_DEBUG
- "recv: shootdown messages received\n");
- printk(KERN_DEBUG
- "rtime: time spent processing messages\n");
- printk(KERN_DEBUG
- "all: shootdown all-tlb messages\n");
- printk(KERN_DEBUG
- "one: shootdown one-tlb messages\n");
- printk(KERN_DEBUG
- "mult: interrupts that found multiple messages\n");
- printk(KERN_DEBUG
- "none: interrupts that found no messages\n");
- printk(KERN_DEBUG
- "retry: number of retry messages processed\n");
- printk(KERN_DEBUG
- "canc: number messages canceled by retries\n");
- printk(KERN_DEBUG
- "nocan: number retries that found nothing to cancel\n");
- printk(KERN_DEBUG
- "reset: number of ipi-style reset requests processed\n");
- printk(KERN_DEBUG
- "rcan: number messages canceled by reset requests\n");
- printk(KERN_DEBUG
- "disable: number times use of the BAU was disabled\n");
- printk(KERN_DEBUG
- "enable: number times use of the BAU was re-enabled\n");
- } else if (input_arg == -1) {
- for_each_present_cpu(cpu) {
- stat = &per_cpu(ptcstats, cpu);
- memset(stat, 0, sizeof(struct ptc_stats));
- }
- }
-
- return count;
-}
-
-static int local_atoi(const char *name)
-{
- int val = 0;
-
- for (;; name++) {
- switch (*name) {
- case '0' ... '9':
- val = 10*val+(*name-'0');
- break;
- default:
- return val;
- }
- }
-}
-
-/*
- * set the tunables
- * 0 values reset them to defaults
- */
-static ssize_t tunables_write(struct file *file, const char __user *user,
- size_t count, loff_t *data)
-{
- int cpu;
- int cnt = 0;
- int val;
- char *p;
- char *q;
- char instr[64];
- struct bau_control *bcp;
-
- if (count == 0 || count > sizeof(instr)-1)
- return -EINVAL;
- if (copy_from_user(instr, user, count))
- return -EFAULT;
-
- instr[count] = '\0';
- /* count the fields */
- p = instr + strspn(instr, WHITESPACE);
- q = p;
- for (; *p; p = q + strspn(q, WHITESPACE)) {
- q = p + strcspn(p, WHITESPACE);
- cnt++;
- if (q == p)
- break;
- }
- if (cnt != 9) {
- printk(KERN_INFO "bau tunable error: should be 9 numbers\n");
- return -EINVAL;
- }
-
- p = instr + strspn(instr, WHITESPACE);
- q = p;
- for (cnt = 0; *p; p = q + strspn(q, WHITESPACE), cnt++) {
- q = p + strcspn(p, WHITESPACE);
- val = local_atoi(p);
- switch (cnt) {
- case 0:
- if (val == 0) {
- max_bau_concurrent = MAX_BAU_CONCURRENT;
- max_bau_concurrent_constant =
- MAX_BAU_CONCURRENT;
- continue;
- }
- bcp = &per_cpu(bau_control, smp_processor_id());
- if (val < 1 || val > bcp->cpus_in_uvhub) {
- printk(KERN_DEBUG
- "Error: BAU max concurrent %d is invalid\n",
- val);
- return -EINVAL;
- }
- max_bau_concurrent = val;
- max_bau_concurrent_constant = val;
- continue;
- case 1:
- if (val == 0)
- plugged_delay = PLUGGED_DELAY;
- else
- plugged_delay = val;
- continue;
- case 2:
- if (val == 0)
- plugsb4reset = PLUGSB4RESET;
- else
- plugsb4reset = val;
- continue;
- case 3:
- if (val == 0)
- timeoutsb4reset = TIMEOUTSB4RESET;
- else
- timeoutsb4reset = val;
- continue;
- case 4:
- if (val == 0)
- ipi_reset_limit = IPI_RESET_LIMIT;
- else
- ipi_reset_limit = val;
- continue;
- case 5:
- if (val == 0)
- complete_threshold = COMPLETE_THRESHOLD;
- else
- complete_threshold = val;
- continue;
- case 6:
- if (val == 0)
- congested_response_us = CONGESTED_RESPONSE_US;
- else
- congested_response_us = val;
- continue;
- case 7:
- if (val == 0)
- congested_reps = CONGESTED_REPS;
- else
- congested_reps = val;
- continue;
- case 8:
- if (val == 0)
- congested_period = CONGESTED_PERIOD;
- else
- congested_period = val;
- continue;
- }
- if (q == p)
- break;
- }
- for_each_present_cpu(cpu) {
- bcp = &per_cpu(bau_control, cpu);
- bcp->max_bau_concurrent = max_bau_concurrent;
- bcp->max_bau_concurrent_constant = max_bau_concurrent;
- bcp->plugged_delay = plugged_delay;
- bcp->plugsb4reset = plugsb4reset;
- bcp->timeoutsb4reset = timeoutsb4reset;
- bcp->ipi_reset_limit = ipi_reset_limit;
- bcp->complete_threshold = complete_threshold;
- bcp->congested_response_us = congested_response_us;
- bcp->congested_reps = congested_reps;
- bcp->congested_period = congested_period;
- }
- return count;
-}
-
-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
-};
-
-static int uv_ptc_proc_open(struct inode *inode, struct file *file)
-{
- return seq_open(file, &uv_ptc_seq_ops);
-}
-
-static int tunables_open(struct inode *inode, struct file *file)
-{
- return 0;
-}
-
-static const struct file_operations proc_uv_ptc_operations = {
- .open = uv_ptc_proc_open,
- .read = seq_read,
- .write = uv_ptc_proc_write,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static const struct file_operations tunables_fops = {
- .open = tunables_open,
- .read = tunables_read,
- .write = tunables_write,
- .llseek = default_llseek,
-};
-
-static int __init uv_ptc_init(void)
-{
- struct proc_dir_entry *proc_uv_ptc;
-
- if (!is_uv_system())
- return 0;
-
- proc_uv_ptc = proc_create(UV_PTC_BASENAME, 0444, NULL,
- &proc_uv_ptc_operations);
- if (!proc_uv_ptc) {
- printk(KERN_ERR "unable to create %s proc entry\n",
- UV_PTC_BASENAME);
- return -EINVAL;
- }
-
- tunables_dir = debugfs_create_dir(UV_BAU_TUNABLES_DIR, NULL);
- if (!tunables_dir) {
- printk(KERN_ERR "unable to create debugfs directory %s\n",
- UV_BAU_TUNABLES_DIR);
- return -EINVAL;
- }
- tunables_file = debugfs_create_file(UV_BAU_TUNABLES_FILE, 0600,
- tunables_dir, NULL, &tunables_fops);
- if (!tunables_file) {
- printk(KERN_ERR "unable to create debugfs file %s\n",
- UV_BAU_TUNABLES_FILE);
- return -EINVAL;
- }
- return 0;
-}
-
-/*
- * initialize the sending side's sending buffers
- */
-static void
-uv_activation_descriptor_init(int node, int pnode)
-{
- int i;
- int cpu;
- unsigned long pa;
- unsigned long m;
- unsigned long n;
- struct bau_desc *bau_desc;
- struct bau_desc *bd2;
- struct bau_control *bcp;
-
- /*
- * each bau_desc is 64 bytes; there are 8 (UV_ITEMS_PER_DESCRIPTOR)
- * per cpu; and up to 32 (UV_ADP_SIZE) cpu's per uvhub
- */
- bau_desc = (struct bau_desc *)kmalloc_node(sizeof(struct bau_desc)*
- UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR, GFP_KERNEL, node);
- BUG_ON(!bau_desc);
-
- pa = uv_gpa(bau_desc); /* need the real nasid*/
- n = pa >> uv_nshift;
- m = pa & uv_mmask;
-
- uv_write_global_mmr64(pnode, UVH_LB_BAU_SB_DESCRIPTOR_BASE,
- (n << UV_DESC_BASE_PNODE_SHIFT | m));
-
- /*
- * initializing all 8 (UV_ITEMS_PER_DESCRIPTOR) descriptors for each
- * cpu even though we only use the first one; one descriptor can
- * describe a broadcast to 256 uv hubs.
- */
- for (i = 0, bd2 = bau_desc; i < (UV_ADP_SIZE*UV_ITEMS_PER_DESCRIPTOR);
- i++, bd2++) {
- memset(bd2, 0, sizeof(struct bau_desc));
- bd2->header.sw_ack_flag = 1;
- /*
- * base_dest_nodeid is the nasid (pnode<<1) of the first uvhub
- * in the partition. The bit map will indicate uvhub numbers,
- * which are 0-N in a partition. Pnodes are unique system-wide.
- */
- bd2->header.base_dest_nodeid = uv_partition_base_pnode << 1;
- bd2->header.dest_subnodeid = 0x10; /* the LB */
- bd2->header.command = UV_NET_ENDPOINT_INTD;
- bd2->header.int_both = 1;
- /*
- * all others need to be set to zero:
- * fairness chaining multilevel count replied_to
- */
- }
- for_each_present_cpu(cpu) {
- if (pnode != uv_blade_to_pnode(uv_cpu_to_blade_id(cpu)))
- continue;
- bcp = &per_cpu(bau_control, cpu);
- bcp->descriptor_base = bau_desc;
- }
-}
-
-/*
- * initialize the destination side's receiving buffers
- * entered for each uvhub in the partition
- * - node is first node (kernel memory notion) on the uvhub
- * - pnode is the uvhub's physical identifier
- */
-static void
-uv_payload_queue_init(int node, int pnode)
-{
- int pn;
- int cpu;
- char *cp;
- unsigned long pa;
- struct bau_payload_queue_entry *pqp;
- struct bau_payload_queue_entry *pqp_malloc;
- struct bau_control *bcp;
-
- pqp = (struct bau_payload_queue_entry *) kmalloc_node(
- (DEST_Q_SIZE + 1) * sizeof(struct bau_payload_queue_entry),
- GFP_KERNEL, node);
- BUG_ON(!pqp);
- pqp_malloc = pqp;
-
- cp = (char *)pqp + 31;
- pqp = (struct bau_payload_queue_entry *)(((unsigned long)cp >> 5) << 5);
-
- for_each_present_cpu(cpu) {
- if (pnode != uv_cpu_to_pnode(cpu))
- continue;
- /* for every cpu on this pnode: */
- bcp = &per_cpu(bau_control, cpu);
- bcp->va_queue_first = pqp;
- bcp->bau_msg_head = pqp;
- bcp->va_queue_last = pqp + (DEST_Q_SIZE - 1);
- }
- /*
- * need the pnode of where the memory was really allocated
- */
- pa = uv_gpa(pqp);
- pn = pa >> uv_nshift;
- uv_write_global_mmr64(pnode,
- UVH_LB_BAU_INTD_PAYLOAD_QUEUE_FIRST,
- ((unsigned long)pn << UV_PAYLOADQ_PNODE_SHIFT) |
- uv_physnodeaddr(pqp));
- uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_TAIL,
- uv_physnodeaddr(pqp));
- uv_write_global_mmr64(pnode, UVH_LB_BAU_INTD_PAYLOAD_QUEUE_LAST,
- (unsigned long)
- uv_physnodeaddr(pqp + (DEST_Q_SIZE - 1)));
- /* in effect, all msg_type's are set to MSG_NOOP */
- memset(pqp, 0, sizeof(struct bau_payload_queue_entry) * DEST_Q_SIZE);
-}
-
-/*
- * Initialization of each UV hub's structures
- */
-static void __init uv_init_uvhub(int uvhub, int vector)
-{
- int node;
- int pnode;
- unsigned long apicid;
-
- node = uvhub_to_first_node(uvhub);
- pnode = uv_blade_to_pnode(uvhub);
- uv_activation_descriptor_init(node, pnode);
- uv_payload_queue_init(node, pnode);
- /*
- * the below initialization can't be in firmware because the
- * messaging IRQ will be determined by the OS
- */
- apicid = uvhub_to_first_apicid(uvhub);
- uv_write_global_mmr64(pnode, UVH_BAU_DATA_CONFIG,
- ((apicid << 32) | vector));
-}
-
-/*
- * We will set BAU_MISC_CONTROL with a timeout period.
- * But the BIOS has set UVH_AGING_PRESCALE_SEL and UVH_TRANSACTION_TIMEOUT.
- * So the destination timeout period has be be calculated from them.
- */
-static int
-calculate_destination_timeout(void)
-{
- unsigned long mmr_image;
- int mult1;
- int mult2;
- int index;
- int base;
- int ret;
- unsigned long ts_ns;
-
- mult1 = UV_INTD_SOFT_ACK_TIMEOUT_PERIOD & BAU_MISC_CONTROL_MULT_MASK;
- mmr_image = uv_read_local_mmr(UVH_AGING_PRESCALE_SEL);
- index = (mmr_image >> BAU_URGENCY_7_SHIFT) & BAU_URGENCY_7_MASK;
- mmr_image = uv_read_local_mmr(UVH_TRANSACTION_TIMEOUT);
- mult2 = (mmr_image >> BAU_TRANS_SHIFT) & BAU_TRANS_MASK;
- base = timeout_base_ns[index];
- ts_ns = base * mult1 * mult2;
- ret = ts_ns / 1000;
- return ret;
-}
-
-/*
- * initialize the bau_control structure for each cpu
- */
-static void __init uv_init_per_cpu(int nuvhubs)
-{
- int i;
- int cpu;
- int pnode;
- int uvhub;
- int have_hmaster;
- short socket = 0;
- unsigned short socket_mask;
- unsigned char *uvhub_mask;
- struct bau_control *bcp;
- struct uvhub_desc *bdp;
- struct socket_desc *sdp;
- struct bau_control *hmaster = NULL;
- struct bau_control *smaster = NULL;
- struct socket_desc {
- short num_cpus;
- short cpu_number[16];
- };
- struct uvhub_desc {
- unsigned short socket_mask;
- short num_cpus;
- short uvhub;
- short pnode;
- struct socket_desc socket[2];
- };
- struct uvhub_desc *uvhub_descs;
-
- timeout_us = calculate_destination_timeout();
-
- uvhub_descs = (struct uvhub_desc *)
- kmalloc(nuvhubs * sizeof(struct uvhub_desc), GFP_KERNEL);
- memset(uvhub_descs, 0, nuvhubs * sizeof(struct uvhub_desc));
- uvhub_mask = kzalloc((nuvhubs+7)/8, GFP_KERNEL);
- for_each_present_cpu(cpu) {
- bcp = &per_cpu(bau_control, cpu);
- memset(bcp, 0, sizeof(struct bau_control));
- pnode = uv_cpu_hub_info(cpu)->pnode;
- uvhub = uv_cpu_hub_info(cpu)->numa_blade_id;
- *(uvhub_mask + (uvhub/8)) |= (1 << (uvhub%8));
- bdp = &uvhub_descs[uvhub];
- bdp->num_cpus++;
- bdp->uvhub = uvhub;
- bdp->pnode = pnode;
- /* kludge: 'assuming' one node per socket, and assuming that
- disabling a socket just leaves a gap in node numbers */
- socket = (cpu_to_node(cpu) & 1);
- bdp->socket_mask |= (1 << socket);
- sdp = &bdp->socket[socket];
- sdp->cpu_number[sdp->num_cpus] = cpu;
- sdp->num_cpus++;
- }
- for (uvhub = 0; uvhub < nuvhubs; uvhub++) {
- if (!(*(uvhub_mask + (uvhub/8)) & (1 << (uvhub%8))))
- continue;
- have_hmaster = 0;
- bdp = &uvhub_descs[uvhub];
- socket_mask = bdp->socket_mask;
- socket = 0;
- while (socket_mask) {
- if (!(socket_mask & 1))
- goto nextsocket;
- sdp = &bdp->socket[socket];
- for (i = 0; i < sdp->num_cpus; i++) {
- cpu = sdp->cpu_number[i];
- bcp = &per_cpu(bau_control, cpu);
- bcp->cpu = cpu;
- if (i == 0) {
- smaster = bcp;
- if (!have_hmaster) {
- have_hmaster++;
- hmaster = bcp;
- }
- }
- bcp->cpus_in_uvhub = bdp->num_cpus;
- bcp->cpus_in_socket = sdp->num_cpus;
- bcp->socket_master = smaster;
- bcp->uvhub = bdp->uvhub;
- bcp->uvhub_master = hmaster;
- bcp->uvhub_cpu = uv_cpu_hub_info(cpu)->
- blade_processor_id;
- }
-nextsocket:
- socket++;
- socket_mask = (socket_mask >> 1);
- }
- }
- kfree(uvhub_descs);
- kfree(uvhub_mask);
- for_each_present_cpu(cpu) {
- bcp = &per_cpu(bau_control, cpu);
- bcp->baudisabled = 0;
- bcp->statp = &per_cpu(ptcstats, cpu);
- /* time interval to catch a hardware stay-busy bug */
- bcp->timeout_interval = microsec_2_cycles(2*timeout_us);
- bcp->max_bau_concurrent = max_bau_concurrent;
- bcp->max_bau_concurrent_constant = max_bau_concurrent;
- bcp->plugged_delay = plugged_delay;
- bcp->plugsb4reset = plugsb4reset;
- bcp->timeoutsb4reset = timeoutsb4reset;
- bcp->ipi_reset_limit = ipi_reset_limit;
- bcp->complete_threshold = complete_threshold;
- bcp->congested_response_us = congested_response_us;
- bcp->congested_reps = congested_reps;
- bcp->congested_period = congested_period;
- }
-}
-
-/*
- * Initialization of BAU-related structures
- */
-static int __init uv_bau_init(void)
-{
- int uvhub;
- int pnode;
- int nuvhubs;
- int cur_cpu;
- int vector;
- unsigned long mmr;
-
- if (!is_uv_system())
- return 0;
-
- if (nobau)
- return 0;
-
- for_each_possible_cpu(cur_cpu)
- zalloc_cpumask_var_node(&per_cpu(uv_flush_tlb_mask, cur_cpu),
- GFP_KERNEL, cpu_to_node(cur_cpu));
-
- uv_nshift = uv_hub_info->m_val;
- uv_mmask = (1UL << uv_hub_info->m_val) - 1;
- nuvhubs = uv_num_possible_blades();
- spin_lock_init(&disable_lock);
- congested_cycles = microsec_2_cycles(congested_response_us);
-
- uv_init_per_cpu(nuvhubs);
-
- uv_partition_base_pnode = 0x7fffffff;
- for (uvhub = 0; uvhub < nuvhubs; uvhub++)
- if (uv_blade_nr_possible_cpus(uvhub) &&
- (uv_blade_to_pnode(uvhub) < uv_partition_base_pnode))
- uv_partition_base_pnode = uv_blade_to_pnode(uvhub);
-
- vector = UV_BAU_MESSAGE;
- for_each_possible_blade(uvhub)
- if (uv_blade_nr_possible_cpus(uvhub))
- uv_init_uvhub(uvhub, vector);
-
- uv_enable_timeouts();
- alloc_intr_gate(vector, uv_bau_message_intr1);
-
- for_each_possible_blade(uvhub) {
- if (uv_blade_nr_possible_cpus(uvhub)) {
- pnode = uv_blade_to_pnode(uvhub);
- /* INIT the bau */
- uv_write_global_mmr64(pnode,
- UVH_LB_BAU_SB_ACTIVATION_CONTROL,
- ((unsigned long)1 << 63));
- mmr = 1; /* should be 1 to broadcast to both sockets */
- uv_write_global_mmr64(pnode, UVH_BAU_DATA_BROADCAST,
- mmr);
- }
- }
-
- return 0;
-}
-core_initcall(uv_bau_init);
-fs_initcall(uv_ptc_init);
diff --git a/arch/x86/kernel/uv_irq.c b/arch/x86/kernel/uv_irq.c
deleted file mode 100644
index 7b24460..0000000
--- a/arch/x86/kernel/uv_irq.c
+++ /dev/null
@@ -1,285 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * SGI UV IRQ functions
- *
- * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
- */
-
-#include <linux/module.h>
-#include <linux/rbtree.h>
-#include <linux/slab.h>
-#include <linux/irq.h>
-
-#include <asm/apic.h>
-#include <asm/uv/uv_irq.h>
-#include <asm/uv/uv_hub.h>
-
-/* MMR offset and pnode of hub sourcing interrupts for a given irq */
-struct uv_irq_2_mmr_pnode{
- struct rb_node list;
- unsigned long offset;
- int pnode;
- int irq;
-};
-
-static spinlock_t uv_irq_lock;
-static struct rb_root uv_irq_root;
-
-static int uv_set_irq_affinity(struct irq_data *, const struct cpumask *, bool);
-
-static void uv_noop(struct irq_data *data) { }
-
-static void uv_ack_apic(struct irq_data *data)
-{
- ack_APIC_irq();
-}
-
-static struct irq_chip uv_irq_chip = {
- .name = "UV-CORE",
- .irq_mask = uv_noop,
- .irq_unmask = uv_noop,
- .irq_eoi = uv_ack_apic,
- .irq_set_affinity = uv_set_irq_affinity,
-};
-
-/*
- * Add offset and pnode information of the hub sourcing interrupts to the
- * rb tree for a specific irq.
- */
-static int uv_set_irq_2_mmr_info(int irq, unsigned long offset, unsigned blade)
-{
- struct rb_node **link = &uv_irq_root.rb_node;
- struct rb_node *parent = NULL;
- struct uv_irq_2_mmr_pnode *n;
- struct uv_irq_2_mmr_pnode *e;
- unsigned long irqflags;
-
- n = kmalloc_node(sizeof(struct uv_irq_2_mmr_pnode), GFP_KERNEL,
- uv_blade_to_memory_nid(blade));
- if (!n)
- return -ENOMEM;
-
- n->irq = irq;
- n->offset = offset;
- n->pnode = uv_blade_to_pnode(blade);
- spin_lock_irqsave(&uv_irq_lock, irqflags);
- /* Find the right place in the rbtree: */
- while (*link) {
- parent = *link;
- e = rb_entry(parent, struct uv_irq_2_mmr_pnode, list);
-
- if (unlikely(irq == e->irq)) {
- /* irq entry exists */
- e->pnode = uv_blade_to_pnode(blade);
- e->offset = offset;
- spin_unlock_irqrestore(&uv_irq_lock, irqflags);
- kfree(n);
- return 0;
- }
-
- if (irq < e->irq)
- link = &(*link)->rb_left;
- else
- link = &(*link)->rb_right;
- }
-
- /* Insert the node into the rbtree. */
- rb_link_node(&n->list, parent, link);
- rb_insert_color(&n->list, &uv_irq_root);
-
- spin_unlock_irqrestore(&uv_irq_lock, irqflags);
- return 0;
-}
-
-/* Retrieve offset and pnode information from the rb tree for a specific irq */
-int uv_irq_2_mmr_info(int irq, unsigned long *offset, int *pnode)
-{
- struct uv_irq_2_mmr_pnode *e;
- struct rb_node *n;
- unsigned long irqflags;
-
- spin_lock_irqsave(&uv_irq_lock, irqflags);
- n = uv_irq_root.rb_node;
- while (n) {
- e = rb_entry(n, struct uv_irq_2_mmr_pnode, list);
-
- if (e->irq == irq) {
- *offset = e->offset;
- *pnode = e->pnode;
- spin_unlock_irqrestore(&uv_irq_lock, irqflags);
- return 0;
- }
-
- if (irq < e->irq)
- n = n->rb_left;
- else
- n = n->rb_right;
- }
- spin_unlock_irqrestore(&uv_irq_lock, irqflags);
- return -1;
-}
-
-/*
- * Re-target the irq to the specified CPU and enable the specified MMR located
- * on the specified blade to allow the sending of MSIs to the specified CPU.
- */
-static int
-arch_enable_uv_irq(char *irq_name, unsigned int irq, int cpu, int mmr_blade,
- unsigned long mmr_offset, int limit)
-{
- const struct cpumask *eligible_cpu = cpumask_of(cpu);
- struct irq_cfg *cfg = get_irq_chip_data(irq);
- unsigned long mmr_value;
- struct uv_IO_APIC_route_entry *entry;
- int mmr_pnode, err;
-
- BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) !=
- sizeof(unsigned long));
-
- err = assign_irq_vector(irq, cfg, eligible_cpu);
- if (err != 0)
- return err;
-
- if (limit == UV_AFFINITY_CPU)
- irq_set_status_flags(irq, IRQ_NO_BALANCING);
- else
- irq_set_status_flags(irq, IRQ_MOVE_PCNTXT);
-
- set_irq_chip_and_handler_name(irq, &uv_irq_chip, handle_percpu_irq,
- irq_name);
-
- mmr_value = 0;
- entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
- entry->vector = cfg->vector;
- entry->delivery_mode = apic->irq_delivery_mode;
- entry->dest_mode = apic->irq_dest_mode;
- entry->polarity = 0;
- entry->trigger = 0;
- entry->mask = 0;
- entry->dest = apic->cpu_mask_to_apicid(eligible_cpu);
-
- mmr_pnode = uv_blade_to_pnode(mmr_blade);
- uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
-
- if (cfg->move_in_progress)
- send_cleanup_vector(cfg);
-
- return irq;
-}
-
-/*
- * Disable the specified MMR located on the specified blade so that MSIs are
- * longer allowed to be sent.
- */
-static void arch_disable_uv_irq(int mmr_pnode, unsigned long mmr_offset)
-{
- unsigned long mmr_value;
- struct uv_IO_APIC_route_entry *entry;
-
- BUILD_BUG_ON(sizeof(struct uv_IO_APIC_route_entry) !=
- sizeof(unsigned long));
-
- mmr_value = 0;
- entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
- entry->mask = 1;
-
- uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
-}
-
-static int
-uv_set_irq_affinity(struct irq_data *data, const struct cpumask *mask,
- bool force)
-{
- struct irq_cfg *cfg = data->chip_data;
- unsigned int dest;
- unsigned long mmr_value, mmr_offset;
- struct uv_IO_APIC_route_entry *entry;
- int mmr_pnode;
-
- if (__ioapic_set_affinity(data, mask, &dest))
- return -1;
-
- mmr_value = 0;
- entry = (struct uv_IO_APIC_route_entry *)&mmr_value;
-
- entry->vector = cfg->vector;
- entry->delivery_mode = apic->irq_delivery_mode;
- entry->dest_mode = apic->irq_dest_mode;
- entry->polarity = 0;
- entry->trigger = 0;
- entry->mask = 0;
- entry->dest = dest;
-
- /* Get previously stored MMR and pnode of hub sourcing interrupts */
- if (uv_irq_2_mmr_info(data->irq, &mmr_offset, &mmr_pnode))
- return -1;
-
- uv_write_global_mmr64(mmr_pnode, mmr_offset, mmr_value);
-
- if (cfg->move_in_progress)
- send_cleanup_vector(cfg);
-
- return 0;
-}
-
-/*
- * Set up a mapping of an available irq and vector, and enable the specified
- * MMR that defines the MSI that is to be sent to the specified CPU when an
- * interrupt is raised.
- */
-int uv_setup_irq(char *irq_name, int cpu, int mmr_blade,
- unsigned long mmr_offset, int limit)
-{
- int irq, ret;
-
- irq = create_irq_nr(NR_IRQS_LEGACY, uv_blade_to_memory_nid(mmr_blade));
-
- if (irq <= 0)
- return -EBUSY;
-
- ret = arch_enable_uv_irq(irq_name, irq, cpu, mmr_blade, mmr_offset,
- limit);
- if (ret == irq)
- uv_set_irq_2_mmr_info(irq, mmr_offset, mmr_blade);
- else
- destroy_irq(irq);
-
- return ret;
-}
-EXPORT_SYMBOL_GPL(uv_setup_irq);
-
-/*
- * Tear down a mapping of an irq and vector, and disable the specified MMR that
- * defined the MSI that was to be sent to the specified CPU when an interrupt
- * was raised.
- *
- * Set mmr_blade and mmr_offset to what was passed in on uv_setup_irq().
- */
-void uv_teardown_irq(unsigned int irq)
-{
- struct uv_irq_2_mmr_pnode *e;
- struct rb_node *n;
- unsigned long irqflags;
-
- spin_lock_irqsave(&uv_irq_lock, irqflags);
- n = uv_irq_root.rb_node;
- while (n) {
- e = rb_entry(n, struct uv_irq_2_mmr_pnode, list);
- if (e->irq == irq) {
- arch_disable_uv_irq(e->pnode, e->offset);
- rb_erase(n, &uv_irq_root);
- kfree(e);
- break;
- }
- if (irq < e->irq)
- n = n->rb_left;
- else
- n = n->rb_right;
- }
- spin_unlock_irqrestore(&uv_irq_lock, irqflags);
- destroy_irq(irq);
-}
-EXPORT_SYMBOL_GPL(uv_teardown_irq);
diff --git a/arch/x86/kernel/uv_sysfs.c b/arch/x86/kernel/uv_sysfs.c
deleted file mode 100644
index 309c70f..0000000
--- a/arch/x86/kernel/uv_sysfs.c
+++ /dev/null
@@ -1,76 +0,0 @@
-/*
- * This file supports the /sys/firmware/sgi_uv interfaces for SGI UV.
- *
- * 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
- *
- * Copyright (c) 2008 Silicon Graphics, Inc. All Rights Reserved.
- * Copyright (c) Russ Anderson
- */
-
-#include <linux/sysdev.h>
-#include <asm/uv/bios.h>
-#include <asm/uv/uv.h>
-
-struct kobject *sgi_uv_kobj;
-
-static ssize_t partition_id_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%ld\n", sn_partition_id);
-}
-
-static ssize_t coherence_id_show(struct kobject *kobj,
- struct kobj_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%ld\n", partition_coherence_id());
-}
-
-static struct kobj_attribute partition_id_attr =
- __ATTR(partition_id, S_IRUGO, partition_id_show, NULL);
-
-static struct kobj_attribute coherence_id_attr =
- __ATTR(coherence_id, S_IRUGO, coherence_id_show, NULL);
-
-
-static int __init sgi_uv_sysfs_init(void)
-{
- unsigned long ret;
-
- if (!is_uv_system())
- return -ENODEV;
-
- if (!sgi_uv_kobj)
- sgi_uv_kobj = kobject_create_and_add("sgi_uv", firmware_kobj);
- if (!sgi_uv_kobj) {
- printk(KERN_WARNING "kobject_create_and_add sgi_uv failed\n");
- return -EINVAL;
- }
-
- ret = sysfs_create_file(sgi_uv_kobj, &partition_id_attr.attr);
- if (ret) {
- printk(KERN_WARNING "sysfs_create_file partition_id failed\n");
- return ret;
- }
-
- ret = sysfs_create_file(sgi_uv_kobj, &coherence_id_attr.attr);
- if (ret) {
- printk(KERN_WARNING "sysfs_create_file coherence_id failed\n");
- return ret;
- }
-
- return 0;
-}
-
-device_initcall(sgi_uv_sysfs_init);
diff --git a/arch/x86/kernel/uv_time.c b/arch/x86/kernel/uv_time.c
deleted file mode 100644
index 56e421b..0000000
--- a/arch/x86/kernel/uv_time.c
+++ /dev/null
@@ -1,423 +0,0 @@
-/*
- * SGI RTC clock/timer routines.
- *
- * 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
- *
- * Copyright (c) 2009 Silicon Graphics, Inc. All Rights Reserved.
- * Copyright (c) Dimitri Sivanich
- */
-#include <linux/clockchips.h>
-#include <linux/slab.h>
-
-#include <asm/uv/uv_mmrs.h>
-#include <asm/uv/uv_hub.h>
-#include <asm/uv/bios.h>
-#include <asm/uv/uv.h>
-#include <asm/apic.h>
-#include <asm/cpu.h>
-
-#define RTC_NAME "sgi_rtc"
-
-static cycle_t uv_read_rtc(struct clocksource *cs);
-static int uv_rtc_next_event(unsigned long, struct clock_event_device *);
-static void uv_rtc_timer_setup(enum clock_event_mode,
- struct clock_event_device *);
-
-static struct clocksource clocksource_uv = {
- .name = RTC_NAME,
- .rating = 400,
- .read = uv_read_rtc,
- .mask = (cycle_t)UVH_RTC_REAL_TIME_CLOCK_MASK,
- .shift = 10,
- .flags = CLOCK_SOURCE_IS_CONTINUOUS,
-};
-
-static struct clock_event_device clock_event_device_uv = {
- .name = RTC_NAME,
- .features = CLOCK_EVT_FEAT_ONESHOT,
- .shift = 20,
- .rating = 400,
- .irq = -1,
- .set_next_event = uv_rtc_next_event,
- .set_mode = uv_rtc_timer_setup,
- .event_handler = NULL,
-};
-
-static DEFINE_PER_CPU(struct clock_event_device, cpu_ced);
-
-/* There is one of these allocated per node */
-struct uv_rtc_timer_head {
- spinlock_t lock;
- /* next cpu waiting for timer, local node relative: */
- int next_cpu;
- /* number of cpus on this node: */
- int ncpus;
- struct {
- int lcpu; /* systemwide logical cpu number */
- u64 expires; /* next timer expiration for this cpu */
- } cpu[1];
-};
-
-/*
- * Access to uv_rtc_timer_head via blade id.
- */
-static struct uv_rtc_timer_head **blade_info __read_mostly;
-
-static int uv_rtc_evt_enable;
-
-/*
- * Hardware interface routines
- */
-
-/* Send IPIs to another node */
-static void uv_rtc_send_IPI(int cpu)
-{
- unsigned long apicid, val;
- int pnode;
-
- apicid = cpu_physical_id(cpu);
- pnode = uv_apicid_to_pnode(apicid);
- val = (1UL << UVH_IPI_INT_SEND_SHFT) |
- (apicid << UVH_IPI_INT_APIC_ID_SHFT) |
- (X86_PLATFORM_IPI_VECTOR << UVH_IPI_INT_VECTOR_SHFT);
-
- uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
-}
-
-/* Check for an RTC interrupt pending */
-static int uv_intr_pending(int pnode)
-{
- return uv_read_global_mmr64(pnode, UVH_EVENT_OCCURRED0) &
- UVH_EVENT_OCCURRED0_RTC1_MASK;
-}
-
-/* Setup interrupt and return non-zero if early expiration occurred. */
-static int uv_setup_intr(int cpu, u64 expires)
-{
- u64 val;
- int pnode = uv_cpu_to_pnode(cpu);
-
- uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG,
- UVH_RTC1_INT_CONFIG_M_MASK);
- uv_write_global_mmr64(pnode, UVH_INT_CMPB, -1L);
-
- uv_write_global_mmr64(pnode, UVH_EVENT_OCCURRED0_ALIAS,
- UVH_EVENT_OCCURRED0_RTC1_MASK);
-
- val = (X86_PLATFORM_IPI_VECTOR << UVH_RTC1_INT_CONFIG_VECTOR_SHFT) |
- ((u64)cpu_physical_id(cpu) << UVH_RTC1_INT_CONFIG_APIC_ID_SHFT);
-
- /* Set configuration */
- uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG, val);
- /* Initialize comparator value */
- uv_write_global_mmr64(pnode, UVH_INT_CMPB, expires);
-
- if (uv_read_rtc(NULL) <= expires)
- return 0;
-
- return !uv_intr_pending(pnode);
-}
-
-/*
- * Per-cpu timer tracking routines
- */
-
-static __init void uv_rtc_deallocate_timers(void)
-{
- int bid;
-
- for_each_possible_blade(bid) {
- kfree(blade_info[bid]);
- }
- kfree(blade_info);
-}
-
-/* Allocate per-node list of cpu timer expiration times. */
-static __init int uv_rtc_allocate_timers(void)
-{
- int cpu;
-
- blade_info = kmalloc(uv_possible_blades * sizeof(void *), GFP_KERNEL);
- if (!blade_info)
- return -ENOMEM;
- memset(blade_info, 0, uv_possible_blades * sizeof(void *));
-
- for_each_present_cpu(cpu) {
- int nid = cpu_to_node(cpu);
- int bid = uv_cpu_to_blade_id(cpu);
- int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
- struct uv_rtc_timer_head *head = blade_info[bid];
-
- if (!head) {
- head = kmalloc_node(sizeof(struct uv_rtc_timer_head) +
- (uv_blade_nr_possible_cpus(bid) *
- 2 * sizeof(u64)),
- GFP_KERNEL, nid);
- if (!head) {
- uv_rtc_deallocate_timers();
- return -ENOMEM;
- }
- spin_lock_init(&head->lock);
- head->ncpus = uv_blade_nr_possible_cpus(bid);
- head->next_cpu = -1;
- blade_info[bid] = head;
- }
-
- head->cpu[bcpu].lcpu = cpu;
- head->cpu[bcpu].expires = ULLONG_MAX;
- }
-
- return 0;
-}
-
-/* Find and set the next expiring timer. */
-static void uv_rtc_find_next_timer(struct uv_rtc_timer_head *head, int pnode)
-{
- u64 lowest = ULLONG_MAX;
- int c, bcpu = -1;
-
- head->next_cpu = -1;
- for (c = 0; c < head->ncpus; c++) {
- u64 exp = head->cpu[c].expires;
- if (exp < lowest) {
- bcpu = c;
- lowest = exp;
- }
- }
- if (bcpu >= 0) {
- head->next_cpu = bcpu;
- c = head->cpu[bcpu].lcpu;
- if (uv_setup_intr(c, lowest))
- /* If we didn't set it up in time, trigger */
- uv_rtc_send_IPI(c);
- } else {
- uv_write_global_mmr64(pnode, UVH_RTC1_INT_CONFIG,
- UVH_RTC1_INT_CONFIG_M_MASK);
- }
-}
-
-/*
- * Set expiration time for current cpu.
- *
- * Returns 1 if we missed the expiration time.
- */
-static int uv_rtc_set_timer(int cpu, u64 expires)
-{
- int pnode = uv_cpu_to_pnode(cpu);
- int bid = uv_cpu_to_blade_id(cpu);
- struct uv_rtc_timer_head *head = blade_info[bid];
- int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
- u64 *t = &head->cpu[bcpu].expires;
- unsigned long flags;
- int next_cpu;
-
- spin_lock_irqsave(&head->lock, flags);
-
- next_cpu = head->next_cpu;
- *t = expires;
-
- /* Will this one be next to go off? */
- if (next_cpu < 0 || bcpu == next_cpu ||
- expires < head->cpu[next_cpu].expires) {
- head->next_cpu = bcpu;
- if (uv_setup_intr(cpu, expires)) {
- *t = ULLONG_MAX;
- uv_rtc_find_next_timer(head, pnode);
- spin_unlock_irqrestore(&head->lock, flags);
- return -ETIME;
- }
- }
-
- spin_unlock_irqrestore(&head->lock, flags);
- return 0;
-}
-
-/*
- * Unset expiration time for current cpu.
- *
- * Returns 1 if this timer was pending.
- */
-static int uv_rtc_unset_timer(int cpu, int force)
-{
- int pnode = uv_cpu_to_pnode(cpu);
- int bid = uv_cpu_to_blade_id(cpu);
- struct uv_rtc_timer_head *head = blade_info[bid];
- int bcpu = uv_cpu_hub_info(cpu)->blade_processor_id;
- u64 *t = &head->cpu[bcpu].expires;
- unsigned long flags;
- int rc = 0;
-
- spin_lock_irqsave(&head->lock, flags);
-
- if ((head->next_cpu == bcpu && uv_read_rtc(NULL) >= *t) || force)
- rc = 1;
-
- if (rc) {
- *t = ULLONG_MAX;
- /* Was the hardware setup for this timer? */
- if (head->next_cpu == bcpu)
- uv_rtc_find_next_timer(head, pnode);
- }
-
- spin_unlock_irqrestore(&head->lock, flags);
-
- return rc;
-}
-
-
-/*
- * Kernel interface routines.
- */
-
-/*
- * Read the RTC.
- *
- * Starting with HUB rev 2.0, the UV RTC register is replicated across all
- * cachelines of it's own page. This allows faster simultaneous reads
- * from a given socket.
- */
-static cycle_t uv_read_rtc(struct clocksource *cs)
-{
- unsigned long offset;
-
- if (uv_get_min_hub_revision_id() == 1)
- offset = 0;
- else
- offset = (uv_blade_processor_id() * L1_CACHE_BYTES) % PAGE_SIZE;
-
- return (cycle_t)uv_read_local_mmr(UVH_RTC | offset);
-}
-
-/*
- * Program the next event, relative to now
- */
-static int uv_rtc_next_event(unsigned long delta,
- struct clock_event_device *ced)
-{
- int ced_cpu = cpumask_first(ced->cpumask);
-
- return uv_rtc_set_timer(ced_cpu, delta + uv_read_rtc(NULL));
-}
-
-/*
- * Setup the RTC timer in oneshot mode
- */
-static void uv_rtc_timer_setup(enum clock_event_mode mode,
- struct clock_event_device *evt)
-{
- int ced_cpu = cpumask_first(evt->cpumask);
-
- switch (mode) {
- case CLOCK_EVT_MODE_PERIODIC:
- case CLOCK_EVT_MODE_ONESHOT:
- case CLOCK_EVT_MODE_RESUME:
- /* Nothing to do here yet */
- break;
- case CLOCK_EVT_MODE_UNUSED:
- case CLOCK_EVT_MODE_SHUTDOWN:
- uv_rtc_unset_timer(ced_cpu, 1);
- break;
- }
-}
-
-static void uv_rtc_interrupt(void)
-{
- int cpu = smp_processor_id();
- struct clock_event_device *ced = &per_cpu(cpu_ced, cpu);
-
- if (!ced || !ced->event_handler)
- return;
-
- if (uv_rtc_unset_timer(cpu, 0) != 1)
- return;
-
- ced->event_handler(ced);
-}
-
-static int __init uv_enable_evt_rtc(char *str)
-{
- uv_rtc_evt_enable = 1;
-
- return 1;
-}
-__setup("uvrtcevt", uv_enable_evt_rtc);
-
-static __init void uv_rtc_register_clockevents(struct work_struct *dummy)
-{
- struct clock_event_device *ced = &__get_cpu_var(cpu_ced);
-
- *ced = clock_event_device_uv;
- ced->cpumask = cpumask_of(smp_processor_id());
- clockevents_register_device(ced);
-}
-
-static __init int uv_rtc_setup_clock(void)
-{
- int rc;
-
- if (!is_uv_system())
- return -ENODEV;
-
- clocksource_uv.mult = clocksource_hz2mult(sn_rtc_cycles_per_second,
- clocksource_uv.shift);
-
- /* If single blade, prefer tsc */
- if (uv_num_possible_blades() == 1)
- clocksource_uv.rating = 250;
-
- rc = clocksource_register(&clocksource_uv);
- if (rc)
- printk(KERN_INFO "UV RTC clocksource failed rc %d\n", rc);
- else
- printk(KERN_INFO "UV RTC clocksource registered freq %lu MHz\n",
- sn_rtc_cycles_per_second/(unsigned long)1E6);
-
- if (rc || !uv_rtc_evt_enable || x86_platform_ipi_callback)
- return rc;
-
- /* Setup and register clockevents */
- rc = uv_rtc_allocate_timers();
- if (rc)
- goto error;
-
- x86_platform_ipi_callback = uv_rtc_interrupt;
-
- clock_event_device_uv.mult = div_sc(sn_rtc_cycles_per_second,
- NSEC_PER_SEC, clock_event_device_uv.shift);
-
- clock_event_device_uv.min_delta_ns = NSEC_PER_SEC /
- sn_rtc_cycles_per_second;
-
- clock_event_device_uv.max_delta_ns = clocksource_uv.mask *
- (NSEC_PER_SEC / sn_rtc_cycles_per_second);
-
- rc = schedule_on_each_cpu(uv_rtc_register_clockevents);
- if (rc) {
- x86_platform_ipi_callback = NULL;
- uv_rtc_deallocate_timers();
- goto error;
- }
-
- printk(KERN_INFO "UV RTC clockevents registered\n");
-
- return 0;
-
-error:
- clocksource_unregister(&clocksource_uv);
- printk(KERN_INFO "UV RTC clockevents failed rc %d\n", rc);
-
- return rc;
-}
-arch_initcall(uv_rtc_setup_clock);
OpenPOWER on IntegriCloud