489 lines
16 KiB
C
489 lines
16 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* SGI UV Broadcast Assist Unit definitions
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*
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* Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
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*/
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#ifndef _ASM_X86_UV_UV_BAU_H
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#define _ASM_X86_UV_UV_BAU_H
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#include <linux/bitmap.h>
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#define BITSPERBYTE 8
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/*
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* Broadcast Assist Unit messaging structures
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*
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* Selective Broadcast activations are induced by software action
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* specifying a particular 8-descriptor "set" via a 6-bit index written
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* to an MMR.
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* Thus there are 64 unique 512-byte sets of SB descriptors - one set for
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* each 6-bit index value. These descriptor sets are mapped in sequence
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* starting with set 0 located at the address specified in the
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* BAU_SB_DESCRIPTOR_BASE register, set 1 is located at BASE + 512,
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* set 2 is at BASE + 2*512, set 3 at BASE + 3*512, and so on.
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*
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* We will use one set for sending BAU messages from each of the
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* cpu's on the uvhub.
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*
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* TLB shootdown will use the first of the 8 descriptors of each set.
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* Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
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*/
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#define MAX_CPUS_PER_UVHUB 64
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#define MAX_CPUS_PER_SOCKET 32
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#define UV_ADP_SIZE 64 /* hardware-provided max. */
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#define UV_CPUS_PER_ACT_STATUS 32 /* hardware-provided max. */
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#define UV_ITEMS_PER_DESCRIPTOR 8
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/* the 'throttle' to prevent the hardware stay-busy bug */
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#define MAX_BAU_CONCURRENT 3
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#define UV_ACT_STATUS_MASK 0x3
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#define UV_ACT_STATUS_SIZE 2
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#define UV_DISTRIBUTION_SIZE 256
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#define UV_SW_ACK_NPENDING 8
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#define UV_NET_ENDPOINT_INTD 0x38
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#define UV_DESC_BASE_PNODE_SHIFT 49
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#define UV_PAYLOADQ_PNODE_SHIFT 49
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#define UV_PTC_BASENAME "sgi_uv/ptc_statistics"
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#define UV_BAU_BASENAME "sgi_uv/bau_tunables"
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#define UV_BAU_TUNABLES_DIR "sgi_uv"
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#define UV_BAU_TUNABLES_FILE "bau_tunables"
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#define WHITESPACE " \t\n"
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#define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask))
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#define UV_ENABLE_INTD_SOFT_ACK_MODE_SHIFT 15
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#define UV_INTD_SOFT_ACK_TIMEOUT_PERIOD_SHIFT 16
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#define UV_INTD_SOFT_ACK_TIMEOUT_PERIOD 0x0000000009UL
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/* [19:16] SOFT_ACK timeout period 19: 1 is urgency 7 17:16 1 is multiplier */
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#define BAU_MISC_CONTROL_MULT_MASK 3
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#define UVH_AGING_PRESCALE_SEL 0x000000b000UL
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/* [30:28] URGENCY_7 an index into a table of times */
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#define BAU_URGENCY_7_SHIFT 28
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#define BAU_URGENCY_7_MASK 7
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#define UVH_TRANSACTION_TIMEOUT 0x000000b200UL
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/* [45:40] BAU - BAU transaction timeout select - a multiplier */
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#define BAU_TRANS_SHIFT 40
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#define BAU_TRANS_MASK 0x3f
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/*
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* bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1
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*/
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#define DESC_STATUS_IDLE 0
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#define DESC_STATUS_ACTIVE 1
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#define DESC_STATUS_DESTINATION_TIMEOUT 2
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#define DESC_STATUS_SOURCE_TIMEOUT 3
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/*
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* delay for 'plugged' timeout retries, in microseconds
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*/
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#define PLUGGED_DELAY 10
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/*
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* threshholds at which to use IPI to free resources
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*/
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/* after this # consecutive 'plugged' timeouts, use IPI to release resources */
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#define PLUGSB4RESET 100
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/* after this many consecutive timeouts, use IPI to release resources */
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#define TIMEOUTSB4RESET 1
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/* at this number uses of IPI to release resources, giveup the request */
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#define IPI_RESET_LIMIT 1
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/* after this # consecutive successes, bump up the throttle if it was lowered */
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#define COMPLETE_THRESHOLD 5
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/*
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* number of entries in the destination side payload queue
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*/
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#define DEST_Q_SIZE 20
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/*
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* number of destination side software ack resources
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*/
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#define DEST_NUM_RESOURCES 8
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/*
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* completion statuses for sending a TLB flush message
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*/
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#define FLUSH_RETRY_PLUGGED 1
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#define FLUSH_RETRY_TIMEOUT 2
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#define FLUSH_GIVEUP 3
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#define FLUSH_COMPLETE 4
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/*
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* tuning the action when the numalink network is extremely delayed
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*/
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#define CONGESTED_RESPONSE_US 1000 /* 'long' response time, in microseconds */
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#define CONGESTED_REPS 10 /* long delays averaged over this many broadcasts */
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#define CONGESTED_PERIOD 30 /* time for the bau to be disabled, in seconds */
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/*
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* Distribution: 32 bytes (256 bits) (bytes 0-0x1f of descriptor)
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* If the 'multilevel' flag in the header portion of the descriptor
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* has been set to 0, then endpoint multi-unicast mode is selected.
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* The distribution specification (32 bytes) is interpreted as a 256-bit
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* distribution vector. Adjacent bits correspond to consecutive even numbered
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* nodeIDs. The result of adding the index of a given bit to the 15-bit
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* 'base_dest_nodeid' field of the header corresponds to the
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* destination nodeID associated with that specified bit.
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*/
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struct bau_target_uvhubmask {
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unsigned long bits[BITS_TO_LONGS(UV_DISTRIBUTION_SIZE)];
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};
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/*
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* mask of cpu's on a uvhub
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* (during initialization we need to check that unsigned long has
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* enough bits for max. cpu's per uvhub)
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*/
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struct bau_local_cpumask {
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unsigned long bits;
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};
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/*
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* Payload: 16 bytes (128 bits) (bytes 0x20-0x2f of descriptor)
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* only 12 bytes (96 bits) of the payload area are usable.
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* An additional 3 bytes (bits 27:4) of the header address are carried
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* to the next bytes of the destination payload queue.
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* And an additional 2 bytes of the header Suppl_A field are also
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* carried to the destination payload queue.
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* But the first byte of the Suppl_A becomes bits 127:120 (the 16th byte)
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* of the destination payload queue, which is written by the hardware
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* with the s/w ack resource bit vector.
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* [ effective message contents (16 bytes (128 bits) maximum), not counting
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* the s/w ack bit vector ]
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*/
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/*
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* The payload is software-defined for INTD transactions
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*/
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struct bau_msg_payload {
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unsigned long address; /* signifies a page or all TLB's
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of the cpu */
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/* 64 bits */
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unsigned short sending_cpu; /* filled in by sender */
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/* 16 bits */
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unsigned short acknowledge_count;/* filled in by destination */
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/* 16 bits */
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unsigned int reserved1:32; /* not usable */
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};
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/*
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* Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor)
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* see table 4.2.3.0.1 in broacast_assist spec.
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*/
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struct bau_msg_header {
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unsigned int dest_subnodeid:6; /* must be 0x10, for the LB */
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/* bits 5:0 */
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unsigned int base_dest_nodeid:15; /* nasid (pnode<<1) of */
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/* bits 20:6 */ /* first bit in uvhub map */
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unsigned int command:8; /* message type */
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/* bits 28:21 */
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/* 0x38: SN3net EndPoint Message */
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unsigned int rsvd_1:3; /* must be zero */
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/* bits 31:29 */
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/* int will align on 32 bits */
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unsigned int rsvd_2:9; /* must be zero */
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/* bits 40:32 */
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/* Suppl_A is 56-41 */
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unsigned int sequence:16;/* message sequence number */
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/* bits 56:41 */ /* becomes bytes 16-17 of msg */
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/* Address field (96:57) is never used as an
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address (these are address bits 42:3) */
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unsigned int rsvd_3:1; /* must be zero */
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/* bit 57 */
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/* address bits 27:4 are payload */
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/* these next 24 (58-81) bits become bytes 12-14 of msg */
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/* bits 65:58 land in byte 12 */
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unsigned int replied_to:1;/* sent as 0 by the source to byte 12 */
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/* bit 58 */
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unsigned int msg_type:3; /* software type of the message*/
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/* bits 61:59 */
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unsigned int canceled:1; /* message canceled, resource to be freed*/
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/* bit 62 */
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unsigned int payload_1a:1;/* not currently used */
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/* bit 63 */
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unsigned int payload_1b:2;/* not currently used */
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/* bits 65:64 */
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/* bits 73:66 land in byte 13 */
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unsigned int payload_1ca:6;/* not currently used */
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/* bits 71:66 */
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unsigned int payload_1c:2;/* not currently used */
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/* bits 73:72 */
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/* bits 81:74 land in byte 14 */
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unsigned int payload_1d:6;/* not currently used */
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/* bits 79:74 */
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unsigned int payload_1e:2;/* not currently used */
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/* bits 81:80 */
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unsigned int rsvd_4:7; /* must be zero */
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/* bits 88:82 */
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unsigned int sw_ack_flag:1;/* software acknowledge flag */
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/* bit 89 */
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/* INTD trasactions at destination are to
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wait for software acknowledge */
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unsigned int rsvd_5:6; /* must be zero */
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/* bits 95:90 */
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unsigned int rsvd_6:5; /* must be zero */
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/* bits 100:96 */
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unsigned int int_both:1;/* if 1, interrupt both sockets on the uvhub */
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/* bit 101*/
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unsigned int fairness:3;/* usually zero */
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/* bits 104:102 */
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unsigned int multilevel:1; /* multi-level multicast format */
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/* bit 105 */
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/* 0 for TLB: endpoint multi-unicast messages */
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unsigned int chaining:1;/* next descriptor is part of this activation*/
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/* bit 106 */
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unsigned int rsvd_7:21; /* must be zero */
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/* bits 127:107 */
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};
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/* see msg_type: */
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#define MSG_NOOP 0
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#define MSG_REGULAR 1
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#define MSG_RETRY 2
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/*
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* The activation descriptor:
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* The format of the message to send, plus all accompanying control
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* Should be 64 bytes
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*/
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struct bau_desc {
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struct bau_target_uvhubmask distribution;
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/*
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* message template, consisting of header and payload:
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*/
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struct bau_msg_header header;
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struct bau_msg_payload payload;
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};
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/*
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* -payload-- ---------header------
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* bytes 0-11 bits 41-56 bits 58-81
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* A B (2) C (3)
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*
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* A/B/C are moved to:
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* A C B
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* bytes 0-11 bytes 12-14 bytes 16-17 (byte 15 filled in by hw as vector)
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* ------------payload queue-----------
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*/
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/*
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* The payload queue on the destination side is an array of these.
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* With BAU_MISC_CONTROL set for software acknowledge mode, the messages
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* are 32 bytes (2 micropackets) (256 bits) in length, but contain only 17
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* bytes of usable data, including the sw ack vector in byte 15 (bits 127:120)
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* (12 bytes come from bau_msg_payload, 3 from payload_1, 2 from
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* sw_ack_vector and payload_2)
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* "Enabling Software Acknowledgment mode (see Section 4.3.3 Software
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* Acknowledge Processing) also selects 32 byte (17 bytes usable) payload
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* operation."
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*/
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struct bau_payload_queue_entry {
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unsigned long address; /* signifies a page or all TLB's
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of the cpu */
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/* 64 bits, bytes 0-7 */
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unsigned short sending_cpu; /* cpu that sent the message */
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/* 16 bits, bytes 8-9 */
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unsigned short acknowledge_count; /* filled in by destination */
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/* 16 bits, bytes 10-11 */
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/* these next 3 bytes come from bits 58-81 of the message header */
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unsigned short replied_to:1; /* sent as 0 by the source */
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unsigned short msg_type:3; /* software message type */
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unsigned short canceled:1; /* sent as 0 by the source */
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unsigned short unused1:3; /* not currently using */
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/* byte 12 */
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unsigned char unused2a; /* not currently using */
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/* byte 13 */
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unsigned char unused2; /* not currently using */
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/* byte 14 */
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unsigned char sw_ack_vector; /* filled in by the hardware */
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/* byte 15 (bits 127:120) */
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unsigned short sequence; /* message sequence number */
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/* bytes 16-17 */
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unsigned char unused4[2]; /* not currently using bytes 18-19 */
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/* bytes 18-19 */
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int number_of_cpus; /* filled in at destination */
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/* 32 bits, bytes 20-23 (aligned) */
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unsigned char unused5[8]; /* not using */
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/* bytes 24-31 */
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};
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struct msg_desc {
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struct bau_payload_queue_entry *msg;
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int msg_slot;
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int sw_ack_slot;
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struct bau_payload_queue_entry *va_queue_first;
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struct bau_payload_queue_entry *va_queue_last;
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};
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struct reset_args {
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int sender;
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};
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/*
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* This structure is allocated per_cpu for UV TLB shootdown statistics.
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*/
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struct ptc_stats {
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/* sender statistics */
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unsigned long s_giveup; /* number of fall backs to IPI-style flushes */
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unsigned long s_requestor; /* number of shootdown requests */
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unsigned long s_stimeout; /* source side timeouts */
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unsigned long s_dtimeout; /* destination side timeouts */
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unsigned long s_time; /* time spent in sending side */
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unsigned long s_retriesok; /* successful retries */
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unsigned long s_ntargcpu; /* total number of cpu's targeted */
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unsigned long s_ntargself; /* times the sending cpu was targeted */
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unsigned long s_ntarglocals; /* targets of cpus on the local blade */
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unsigned long s_ntargremotes; /* targets of cpus on remote blades */
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unsigned long s_ntarglocaluvhub; /* targets of the local hub */
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unsigned long s_ntargremoteuvhub; /* remotes hubs targeted */
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unsigned long s_ntarguvhub; /* total number of uvhubs targeted */
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unsigned long s_ntarguvhub16; /* number of times target hubs >= 16*/
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unsigned long s_ntarguvhub8; /* number of times target hubs >= 8 */
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unsigned long s_ntarguvhub4; /* number of times target hubs >= 4 */
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unsigned long s_ntarguvhub2; /* number of times target hubs >= 2 */
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unsigned long s_ntarguvhub1; /* number of times target hubs == 1 */
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unsigned long s_resets_plug; /* ipi-style resets from plug state */
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unsigned long s_resets_timeout; /* ipi-style resets from timeouts */
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unsigned long s_busy; /* status stayed busy past s/w timer */
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unsigned long s_throttles; /* waits in throttle */
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unsigned long s_retry_messages; /* retry broadcasts */
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unsigned long s_bau_reenabled; /* for bau enable/disable */
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unsigned long s_bau_disabled; /* for bau enable/disable */
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/* destination statistics */
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unsigned long d_alltlb; /* times all tlb's on this cpu were flushed */
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unsigned long d_onetlb; /* times just one tlb on this cpu was flushed */
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unsigned long d_multmsg; /* interrupts with multiple messages */
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unsigned long d_nomsg; /* interrupts with no message */
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unsigned long d_time; /* time spent on destination side */
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unsigned long d_requestee; /* number of messages processed */
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unsigned long d_retries; /* number of retry messages processed */
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unsigned long d_canceled; /* number of messages canceled by retries */
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unsigned long d_nocanceled; /* retries that found nothing to cancel */
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unsigned long d_resets; /* number of ipi-style requests processed */
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unsigned long d_rcanceled; /* number of messages canceled by resets */
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};
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/*
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* one per-cpu; to locate the software tables
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*/
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struct bau_control {
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struct bau_desc *descriptor_base;
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struct bau_payload_queue_entry *va_queue_first;
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struct bau_payload_queue_entry *va_queue_last;
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struct bau_payload_queue_entry *bau_msg_head;
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struct bau_control *uvhub_master;
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struct bau_control *socket_master;
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struct ptc_stats *statp;
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unsigned long timeout_interval;
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unsigned long set_bau_on_time;
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atomic_t active_descriptor_count;
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int plugged_tries;
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int timeout_tries;
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int ipi_attempts;
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int conseccompletes;
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int baudisabled;
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int set_bau_off;
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short cpu;
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short uvhub_cpu;
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short uvhub;
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short cpus_in_socket;
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short cpus_in_uvhub;
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unsigned short message_number;
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unsigned short uvhub_quiesce;
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short socket_acknowledge_count[DEST_Q_SIZE];
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cycles_t send_message;
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spinlock_t uvhub_lock;
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spinlock_t queue_lock;
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/* tunables */
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int max_bau_concurrent;
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int max_bau_concurrent_constant;
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int plugged_delay;
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int plugsb4reset;
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int timeoutsb4reset;
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int ipi_reset_limit;
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int complete_threshold;
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int congested_response_us;
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int congested_reps;
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int congested_period;
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cycles_t period_time;
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long period_requests;
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};
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static inline int bau_uvhub_isset(int uvhub, struct bau_target_uvhubmask *dstp)
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{
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return constant_test_bit(uvhub, &dstp->bits[0]);
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}
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static inline void bau_uvhub_set(int uvhub, struct bau_target_uvhubmask *dstp)
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{
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__set_bit(uvhub, &dstp->bits[0]);
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}
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static inline void bau_uvhubs_clear(struct bau_target_uvhubmask *dstp,
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int nbits)
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{
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bitmap_zero(&dstp->bits[0], nbits);
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}
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static inline int bau_uvhub_weight(struct bau_target_uvhubmask *dstp)
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{
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return bitmap_weight((unsigned long *)&dstp->bits[0],
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UV_DISTRIBUTION_SIZE);
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}
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static inline void bau_cpubits_clear(struct bau_local_cpumask *dstp, int nbits)
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{
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bitmap_zero(&dstp->bits, nbits);
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}
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#define cpubit_isset(cpu, bau_local_cpumask) \
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test_bit((cpu), (bau_local_cpumask).bits)
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extern void uv_bau_message_intr1(void);
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extern void uv_bau_timeout_intr1(void);
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struct atomic_short {
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short counter;
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};
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/**
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* atomic_read_short - read a short atomic variable
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* @v: pointer of type atomic_short
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*
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* Atomically reads the value of @v.
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*/
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static inline int atomic_read_short(const struct atomic_short *v)
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{
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return v->counter;
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}
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/**
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* atomic_add_short_return - add and return a short int
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* @i: short value to add
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* @v: pointer of type atomic_short
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*
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* Atomically adds @i to @v and returns @i + @v
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*/
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static inline int atomic_add_short_return(short i, struct atomic_short *v)
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{
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short __i = i;
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asm volatile(LOCK_PREFIX "xaddw %0, %1"
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: "+r" (i), "+m" (v->counter)
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: : "memory");
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return i + __i;
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}
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#endif /* _ASM_X86_UV_UV_BAU_H */
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