summaryrefslogtreecommitdiff
path: root/include/asm-x86/uv/uv_bau.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86/uv/uv_bau.h')
-rw-r--r--include/asm-x86/uv/uv_bau.h337
1 files changed, 337 insertions, 0 deletions
diff --git a/include/asm-x86/uv/uv_bau.h b/include/asm-x86/uv/uv_bau.h
new file mode 100644
index 000000000000..91ac0dfb7588
--- /dev/null
+++ b/include/asm-x86/uv/uv_bau.h
@@ -0,0 +1,337 @@
+/*
+ * 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 Broadcast Assist Unit definitions
+ *
+ * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#ifndef __ASM_X86_UV_BAU__
+#define __ASM_X86_UV_BAU__
+
+#include <linux/bitmap.h>
+#define BITSPERBYTE 8
+
+/*
+ * Broadcast Assist Unit messaging structures
+ *
+ * Selective Broadcast activations are induced by software action
+ * specifying a particular 8-descriptor "set" via a 6-bit index written
+ * to an MMR.
+ * Thus there are 64 unique 512-byte sets of SB descriptors - one set for
+ * each 6-bit index value. These descriptor sets are mapped in sequence
+ * starting with set 0 located at the address specified in the
+ * BAU_SB_DESCRIPTOR_BASE register, set 1 is located at BASE + 512,
+ * set 2 is at BASE + 2*512, set 3 at BASE + 3*512, and so on.
+ *
+ * We will use 31 sets, one for sending BAU messages from each of the 32
+ * cpu's on the node.
+ *
+ * TLB shootdown will use the first of the 8 descriptors of each set.
+ * Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
+ */
+
+#define UV_ITEMS_PER_DESCRIPTOR 8
+#define UV_CPUS_PER_ACT_STATUS 32
+#define UV_ACT_STATUS_MASK 0x3
+#define UV_ACT_STATUS_SIZE 2
+#define UV_ACTIVATION_DESCRIPTOR_SIZE 32
+#define UV_DISTRIBUTION_SIZE 256
+#define UV_SW_ACK_NPENDING 8
+#define UV_BAU_MESSAGE 200
+/*
+ * 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_DESC_BASE_PNODE_SHIFT 49
+#define UV_PAYLOADQ_PNODE_SHIFT 49
+#define UV_PTC_BASENAME "sgi_uv/ptc_statistics"
+#define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask))
+
+/*
+ * 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
+
+/*
+ * source side threshholds at which message retries print a warning
+ */
+#define SOURCE_TIMEOUT_LIMIT 20
+#define DESTINATION_TIMEOUT_LIMIT 20
+
+/*
+ * number of entries in the destination side payload queue
+ */
+#define DEST_Q_SIZE 17
+/*
+ * number of destination side software ack resources
+ */
+#define DEST_NUM_RESOURCES 8
+#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
+ * has been set to 0, then endpoint multi-unicast mode is selected.
+ * The distribution specification (32 bytes) is interpreted as a 256-bit
+ * distribution vector. Adjacent bits correspond to consecutive even numbered
+ * 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
+ * destination nodeID associated with that specified bit.
+ */
+struct bau_target_nodemask {
+ unsigned long bits[BITS_TO_LONGS(256)];
+};
+
+/*
+ * mask of cpu's on a node
+ * (during initialization we need to check that unsigned long has
+ * enough bits for max. cpu's per node)
+ */
+struct bau_local_cpumask {
+ unsigned long bits;
+};
+
+/*
+ * Payload: 16 bytes (128 bits) (bytes 0x20-0x2f of descriptor)
+ * only 12 bytes (96 bits) of the payload area are usable.
+ * An additional 3 bytes (bits 27:4) of the header address are carried
+ * to the next bytes of the destination payload queue.
+ * And an additional 2 bytes of the header Suppl_A field are also
+ * carried to the destination payload queue.
+ * But the first byte of the Suppl_A becomes bits 127:120 (the 16th byte)
+ * of the destination payload queue, which is written by the hardware
+ * with the s/w ack resource bit vector.
+ * [ effective message contents (16 bytes (128 bits) maximum), not counting
+ * the s/w ack bit vector ]
+ */
+
+/*
+ * The payload is software-defined for INTD transactions
+ */
+struct bau_msg_payload {
+ unsigned long address; /* signifies a page or all TLB's
+ of the cpu */
+ /* 64 bits */
+ unsigned short sending_cpu; /* filled in by sender */
+ /* 16 bits */
+ unsigned short acknowledge_count;/* filled in by destination */
+ /* 16 bits */
+ unsigned int reserved1:32; /* not usable */
+};
+
+
+/*
+ * 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 {
+ int dest_subnodeid:6; /* must be zero */
+ /* bits 5:0 */
+ int base_dest_nodeid:15; /* nasid>>1 (pnode) of first bit in node_map */
+ /* bits 20:6 */
+ int command:8; /* message type */
+ /* bits 28:21 */
+ /* 0x38: SN3net EndPoint Message */
+ int rsvd_1:3; /* must be zero */
+ /* bits 31:29 */
+ /* int will align on 32 bits */
+ int rsvd_2:9; /* must be zero */
+ /* bits 40:32 */
+ /* Suppl_A is 56-41 */
+ int payload_2a:8; /* becomes byte 16 of msg */
+ /* bits 48:41 */ /* not currently using */
+ int payload_2b:8; /* becomes byte 17 of msg */
+ /* bits 56:49 */ /* not currently using */
+ /* Address field (96:57) is never used as an
+ address (these are address bits 42:3) */
+ int rsvd_3:1; /* must be zero */
+ /* bit 57 */
+ /* address bits 27:4 are payload */
+ /* these 24 bits become bytes 12-14 of msg */
+ int replied_to:1; /* sent as 0 by the source to byte 12 */
+ /* bit 58 */
+
+ int payload_1a:5; /* not currently used */
+ /* bits 63:59 */
+ int payload_1b:8; /* not currently used */
+ /* bits 71:64 */
+ int payload_1c:8; /* not currently used */
+ /* bits 79:72 */
+ int payload_1d:2; /* not currently used */
+ /* bits 81:80 */
+
+ int rsvd_4:7; /* must be zero */
+ /* bits 88:82 */
+ int sw_ack_flag:1; /* software acknowledge flag */
+ /* bit 89 */
+ /* INTD trasactions at destination are to
+ wait for software acknowledge */
+ int rsvd_5:6; /* must be zero */
+ /* bits 95:90 */
+ int rsvd_6:5; /* must be zero */
+ /* bits 100:96 */
+ int int_both:1; /* if 1, interrupt both sockets on the blade */
+ /* bit 101*/
+ int fairness:3; /* usually zero */
+ /* bits 104:102 */
+ int multilevel:1; /* multi-level multicast format */
+ /* bit 105 */
+ /* 0 for TLB: endpoint multi-unicast messages */
+ int chaining:1; /* next descriptor is part of this activation*/
+ /* bit 106 */
+ int rsvd_7:21; /* must be zero */
+ /* bits 127:107 */
+};
+
+/*
+ * The activation descriptor:
+ * The format of the message to send, plus all accompanying control
+ * Should be 64 bytes
+ */
+struct bau_desc {
+ struct bau_target_nodemask distribution;
+ /*
+ * message template, consisting of header and payload:
+ */
+ struct bau_msg_header header;
+ struct bau_msg_payload payload;
+};
+/*
+ * -payload-- ---------header------
+ * bytes 0-11 bits 41-56 bits 58-81
+ * A B (2) C (3)
+ *
+ * A/B/C are moved to:
+ * A C B
+ * bytes 0-11 bytes 12-14 bytes 16-17 (byte 15 filled in by hw as vector)
+ * ------------payload queue-----------
+ */
+
+/*
+ * The payload queue on the destination side is an array of these.
+ * With BAU_MISC_CONTROL set for software acknowledge mode, the messages
+ * are 32 bytes (2 micropackets) (256 bits) in length, but contain only 17
+ * bytes of usable data, including the sw ack vector in byte 15 (bits 127:120)
+ * (12 bytes come from bau_msg_payload, 3 from payload_1, 2 from
+ * sw_ack_vector and payload_2)
+ * "Enabling Software Acknowledgment mode (see Section 4.3.3 Software
+ * Acknowledge Processing) also selects 32 byte (17 bytes usable) payload
+ * operation."
+ */
+struct bau_payload_queue_entry {
+ unsigned long address; /* signifies a page or all TLB's
+ of the cpu */
+ /* 64 bits, bytes 0-7 */
+
+ unsigned short sending_cpu; /* cpu that sent the message */
+ /* 16 bits, bytes 8-9 */
+
+ unsigned short acknowledge_count; /* filled in by destination */
+ /* 16 bits, bytes 10-11 */
+
+ unsigned short replied_to:1; /* sent as 0 by the source */
+ /* 1 bit */
+ unsigned short unused1:7; /* not currently using */
+ /* 7 bits: byte 12) */
+
+ unsigned char unused2[2]; /* not currently using */
+ /* bytes 13-14 */
+
+ unsigned char sw_ack_vector; /* filled in by the hardware */
+ /* byte 15 (bits 127:120) */
+
+ unsigned char unused4[3]; /* not currently using bytes 17-19 */
+ /* bytes 17-19 */
+
+ int number_of_cpus; /* filled in at destination */
+ /* 32 bits, bytes 20-23 (aligned) */
+
+ unsigned char unused5[8]; /* not using */
+ /* bytes 24-31 */
+};
+
+/*
+ * one for every slot in the destination payload queue
+ */
+struct bau_msg_status {
+ struct bau_local_cpumask seen_by; /* map of cpu's */
+};
+
+/*
+ * one for every slot in the destination software ack resources
+ */
+struct bau_sw_ack_status {
+ struct bau_payload_queue_entry *msg; /* associated message */
+ int watcher; /* cpu monitoring, or -1 */
+};
+
+/*
+ * one on every node and per-cpu; to locate the software tables
+ */
+struct bau_control {
+ 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;
+ struct bau_msg_status *msg_statuses;
+ int *watching; /* pointer to array */
+};
+
+/*
+ * This structure is allocated per_cpu for UV TLB shootdown statistics.
+ */
+struct ptc_stats {
+ unsigned long ptc_i; /* number of IPI-style flushes */
+ unsigned long requestor; /* number of nodes this cpu sent to */
+ unsigned long requestee; /* times cpu was remotely requested */
+ unsigned long alltlb; /* times all tlb's on this cpu were flushed */
+ unsigned long onetlb; /* times just one tlb on this cpu was flushed */
+ unsigned long s_retry; /* retries on source side timeouts */
+ unsigned long d_retry; /* retries on destination side timeouts */
+ unsigned long sflush; /* cycles spent in uv_flush_tlb_others */
+ unsigned long dflush; /* cycles spent on destination side */
+ unsigned long retriesok; /* successes on retries */
+ unsigned long nomsg; /* interrupts with no message */
+ unsigned long multmsg; /* interrupts with multiple messages */
+ unsigned long ntargeted;/* nodes targeted */
+};
+
+static inline int bau_node_isset(int node, struct bau_target_nodemask *dstp)
+{
+ return constant_test_bit(node, &dstp->bits[0]);
+}
+static inline void bau_node_set(int node, struct bau_target_nodemask *dstp)
+{
+ __set_bit(node, &dstp->bits[0]);
+}
+static inline void bau_nodes_clear(struct bau_target_nodemask *dstp, int nbits)
+{
+ bitmap_zero(&dstp->bits[0], nbits);
+}
+
+static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits)
+{
+ bitmap_zero(&dstp->bits, nbits);
+}
+
+#define cpubit_isset(cpu, bau_local_cpumask) \
+ test_bit((cpu), (bau_local_cpumask).bits)
+
+extern int uv_flush_tlb_others(cpumask_t *, struct mm_struct *, unsigned long);
+extern void uv_bau_message_intr1(void);
+extern void uv_bau_timeout_intr1(void);
+
+#endif /* __ASM_X86_UV_BAU__ */