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__ */