Commit b194b120 authored by Cliff Wickman's avatar Cliff Wickman Committed by Ingo Molnar

SGI UV: TLB shootdown using broadcast assist unit, cleanups

TLB shootdown for SGI UV.

v1: 6/2 original
v2: 6/3 corrections/improvements per Ingo's review
v3: 6/4 split atomic operations off to a separate patch (Jeremy's review)
v4: 6/12 include <mach_apic.h> rather than <asm/mach-bigsmp/mach_apic.h>
         (fixes a !SMP build problem that Ingo found)
         fix the index on uv_table_bases[blade]
Signed-off-by: default avatarCliff Wickman <cpw@sgi.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 73e991f4
This diff is collapsed.
...@@ -14,9 +14,9 @@ ...@@ -14,9 +14,9 @@
#include <linux/bitmap.h> #include <linux/bitmap.h>
#define BITSPERBYTE 8 #define BITSPERBYTE 8
/* Broadcast Assist Unit messaging structures */
/* /*
* Broadcast Assist Unit messaging structures
*
* Selective Broadcast activations are induced by software action * Selective Broadcast activations are induced by software action
* specifying a particular 8-descriptor "set" via a 6-bit index written * specifying a particular 8-descriptor "set" via a 6-bit index written
* to an MMR. * to an MMR.
...@@ -40,47 +40,66 @@ ...@@ -40,47 +40,66 @@
#define UV_ACTIVATION_DESCRIPTOR_SIZE 32 #define UV_ACTIVATION_DESCRIPTOR_SIZE 32
#define UV_DISTRIBUTION_SIZE 256 #define UV_DISTRIBUTION_SIZE 256
#define UV_SW_ACK_NPENDING 8 #define UV_SW_ACK_NPENDING 8
#define UV_BAU_MESSAGE 200 /* Messaging irq; see irq_64.h */ #define UV_BAU_MESSAGE 200
/* and include/asm-x86/hw_irq_64.h */ /*
/* To be dynamically allocated in the future */ * Messaging irq; see irq_64.h and include/asm-x86/hw_irq_64.h
* To be dynamically allocated in the future
*/
#define UV_NET_ENDPOINT_INTD 0x38 #define UV_NET_ENDPOINT_INTD 0x38
#define UV_DESC_BASE_PNODE_SHIFT 49 /* position of pnode (nasid>>1) in MMR */ #define UV_DESC_BASE_PNODE_SHIFT 49
#define UV_PAYLOADQ_PNODE_SHIFT 49 #define UV_PAYLOADQ_PNODE_SHIFT 49
#define UV_PTC_BASENAME "sgi_uv/ptc_statistics" #define UV_PTC_BASENAME "sgi_uv/ptc_statistics"
#define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask)) #define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask))
/* bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1 */ /*
* bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1
*/
#define DESC_STATUS_IDLE 0 #define DESC_STATUS_IDLE 0
#define DESC_STATUS_ACTIVE 1 #define DESC_STATUS_ACTIVE 1
#define DESC_STATUS_DESTINATION_TIMEOUT 2 #define DESC_STATUS_DESTINATION_TIMEOUT 2
#define DESC_STATUS_SOURCE_TIMEOUT 3 #define DESC_STATUS_SOURCE_TIMEOUT 3
/* source side threshholds at which message retries print a warning */ /*
* source side threshholds at which message retries print a warning
*/
#define SOURCE_TIMEOUT_LIMIT 20 #define SOURCE_TIMEOUT_LIMIT 20
#define DESTINATION_TIMEOUT_LIMIT 20 #define DESTINATION_TIMEOUT_LIMIT 20
/* number of entries in the destination side payload queue */ /*
* number of entries in the destination side payload queue
*/
#define DESTINATION_PAYLOAD_QUEUE_SIZE 17 #define DESTINATION_PAYLOAD_QUEUE_SIZE 17
/* number of destination side software ack resources */ /*
* number of destination side software ack resources
*/
#define DESTINATION_NUM_RESOURCES 8 #define DESTINATION_NUM_RESOURCES 8
#define MAX_CPUS_PER_NODE 32 #define MAX_CPUS_PER_NODE 32
/*
* completion statuses for sending a TLB flush message
*/
#define FLUSH_RETRY 1
#define FLUSH_GIVEUP 2
#define FLUSH_COMPLETE 3
/* Distribution: 32 bytes (256 bits) (bytes 0-0x1f of descriptor) */ /*
/* If the 'multilevel' flag in the header portion of the descriptor * Distribution: 32 bytes (256 bits) (bytes 0-0x1f of descriptor)
* If the 'multilevel' flag in the header portion of the descriptor
* has been set to 0, then endpoint multi-unicast mode is selected. * has been set to 0, then endpoint multi-unicast mode is selected.
* The distribution specification (32 bytes) is interpreted as a 256-bit * The distribution specification (32 bytes) is interpreted as a 256-bit
* distribution vector. Adjacent bits correspond to consecutive even numbered * distribution vector. Adjacent bits correspond to consecutive even numbered
* nodeIDs. The result of adding the index of a given bit to the 15-bit * nodeIDs. The result of adding the index of a given bit to the 15-bit
* 'base_dest_nodeid' field of the header corresponds to the * 'base_dest_nodeid' field of the header corresponds to the
* destination nodeID associated with that specified bit. */ * destination nodeID associated with that specified bit.
*/
struct bau_target_nodemask { struct bau_target_nodemask {
unsigned long bits[BITS_TO_LONGS(256)]; unsigned long bits[BITS_TO_LONGS(256)];
}; };
/* mask of cpu's on a node */ /*
/* (during initialization we need to check that unsigned long has * mask of cpu's on a node
enough bits for max. cpu's per node) */ * (during initialization we need to check that unsigned long has
* enough bits for max. cpu's per node)
*/
struct bau_local_cpumask { struct bau_local_cpumask {
unsigned long bits; unsigned long bits;
}; };
...@@ -99,7 +118,9 @@ struct bau_local_cpumask { ...@@ -99,7 +118,9 @@ struct bau_local_cpumask {
* the s/w ack bit vector ] * the s/w ack bit vector ]
*/ */
/* The payload is software-defined for INTD transactions */ /*
* The payload is software-defined for INTD transactions
*/
struct bau_msg_payload { struct bau_msg_payload {
unsigned long address; /* signifies a page or all TLB's unsigned long address; /* signifies a page or all TLB's
of the cpu */ of the cpu */
...@@ -112,8 +133,10 @@ struct bau_msg_payload { ...@@ -112,8 +133,10 @@ struct bau_msg_payload {
}; };
/* Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor) */ /*
/* see table 4.2.3.0.1 in broacast_assist spec. */ * Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor)
* see table 4.2.3.0.1 in broacast_assist spec.
*/
struct bau_msg_header { struct bau_msg_header {
int dest_subnodeid:6; /* must be zero */ int dest_subnodeid:6; /* must be zero */
/* bits 5:0 */ /* bits 5:0 */
...@@ -173,11 +196,15 @@ struct bau_msg_header { ...@@ -173,11 +196,15 @@ struct bau_msg_header {
/* bits 127:107 */ /* bits 127:107 */
}; };
/* The format of the message to send, plus all accompanying control */ /*
/* Should be 64 bytes */ * The format of the message to send, plus all accompanying control
* Should be 64 bytes
*/
struct bau_activation_descriptor { struct bau_activation_descriptor {
struct bau_target_nodemask distribution; struct bau_target_nodemask distribution;
/* message template, consisting of header and payload: */ /*
* message template, consisting of header and payload:
*/
struct bau_msg_header header; struct bau_msg_header header;
struct bau_msg_payload payload; struct bau_msg_payload payload;
}; };
...@@ -235,18 +262,24 @@ struct bau_payload_queue_entry { ...@@ -235,18 +262,24 @@ struct bau_payload_queue_entry {
/* bytes 24-31 */ /* bytes 24-31 */
}; };
/* one for every slot in the destination payload queue */ /*
* one for every slot in the destination payload queue
*/
struct bau_msg_status { struct bau_msg_status {
struct bau_local_cpumask seen_by; /* map of cpu's */ struct bau_local_cpumask seen_by; /* map of cpu's */
}; };
/* one for every slot in the destination software ack resources */ /*
* one for every slot in the destination software ack resources
*/
struct bau_sw_ack_status { struct bau_sw_ack_status {
struct bau_payload_queue_entry *msg; /* associated message */ struct bau_payload_queue_entry *msg; /* associated message */
int watcher; /* cpu monitoring, or -1 */ int watcher; /* cpu monitoring, or -1 */
}; };
/* one on every node and per-cpu; to locate the software tables */ /*
* one on every node and per-cpu; to locate the software tables
*/
struct bau_control { struct bau_control {
struct bau_activation_descriptor *descriptor_base; struct bau_activation_descriptor *descriptor_base;
struct bau_payload_queue_entry *bau_msg_head; struct bau_payload_queue_entry *bau_msg_head;
...@@ -267,8 +300,8 @@ struct ptc_stats { ...@@ -267,8 +300,8 @@ struct ptc_stats {
unsigned long onetlb; /* times just one tlb on this cpu was flushed */ unsigned long onetlb; /* times just one tlb on this cpu was flushed */
unsigned long s_retry; /* retries on source side timeouts */ unsigned long s_retry; /* retries on source side timeouts */
unsigned long d_retry; /* retries on destination side timeouts */ unsigned long d_retry; /* retries on destination side timeouts */
unsigned long sflush_ns;/* nanoseconds spent in uv_flush_tlb_others */ unsigned long sflush; /* cycles spent in uv_flush_tlb_others */
unsigned long dflush_ns;/* nanoseconds spent destination side */ unsigned long dflush; /* cycles spent on destination side */
unsigned long retriesok; /* successes on retries */ unsigned long retriesok; /* successes on retries */
unsigned long nomsg; /* interrupts with no message */ unsigned long nomsg; /* interrupts with no message */
unsigned long multmsg; /* interrupts with multiple messages */ unsigned long multmsg; /* interrupts with multiple messages */
...@@ -293,39 +326,11 @@ static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits) ...@@ -293,39 +326,11 @@ static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits)
bitmap_zero(&dstp->bits, nbits); bitmap_zero(&dstp->bits, nbits);
} }
/*
* atomic increment of a short integer
* (rather than using the __sync_add_and_fetch() intrinsic)
*
* returns the new value of the variable
*/
static inline short int atomic_inc_short(short int *v)
{
asm volatile("movw $1, %%cx\n"
"lock ; xaddw %%cx, %0\n"
: "+m" (*v) /* outputs */
: : "%cx", "memory"); /* inputs : clobbereds */
return *v;
}
/*
* atomic OR of two long integers
* (rather than using the __sync_or_and_fetch() intrinsic)
*/
static inline void atomic_or_long(unsigned long *v1, unsigned long v2)
{
asm volatile("movq %0, %%rax; lea %1, %%rdx\n"
"lock ; orq %%rax, %%rdx\n"
: "+m" (*v1) /* outputs */
: "m" (v1), "m" (v2) /* inputs */
: "memory"); /* clobbereds */
}
#define cpubit_isset(cpu, bau_local_cpumask) \ #define cpubit_isset(cpu, bau_local_cpumask) \
test_bit((cpu), (bau_local_cpumask).bits) test_bit((cpu), (bau_local_cpumask).bits)
int uv_flush_tlb_others(cpumask_t *, struct mm_struct *, unsigned long); extern int uv_flush_tlb_others(cpumask_t *, struct mm_struct *, unsigned long);
void uv_bau_message_intr1(void); extern void uv_bau_message_intr1(void);
void uv_bau_timeout_intr1(void); extern void uv_bau_timeout_intr1(void);
#endif /* __ASM_X86_UV_BAU__ */ #endif /* __ASM_X86_UV_BAU__ */
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