2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
6 * SGI UV Broadcast Assist Unit definitions
8 * Copyright (C) 2008 Silicon Graphics, Inc. All rights reserved.
11 #ifndef __ASM_X86_UV_BAU__
12 #define __ASM_X86_UV_BAU__
14 #include <linux/bitmap.h>
17 /* Broadcast Assist Unit messaging structures */
20 * Selective Broadcast activations are induced by software action
21 * specifying a particular 8-descriptor "set" via a 6-bit index written
23 * Thus there are 64 unique 512-byte sets of SB descriptors - one set for
24 * each 6-bit index value. These descriptor sets are mapped in sequence
25 * starting with set 0 located at the address specified in the
26 * BAU_SB_DESCRIPTOR_BASE register, set 1 is located at BASE + 512,
27 * set 2 is at BASE + 2*512, set 3 at BASE + 3*512, and so on.
29 * We will use 31 sets, one for sending BAU messages from each of the 32
32 * TLB shootdown will use the first of the 8 descriptors of each set.
33 * Each of the descriptors is 64 bytes in size (8*64 = 512 bytes in a set).
36 #define UV_ITEMS_PER_DESCRIPTOR 8
37 #define UV_CPUS_PER_ACT_STATUS 32
38 #define UV_ACT_STATUS_MASK 0x3
39 #define UV_ACT_STATUS_SIZE 2
40 #define UV_ACTIVATION_DESCRIPTOR_SIZE 32
41 #define UV_DISTRIBUTION_SIZE 256
42 #define UV_SW_ACK_NPENDING 8
43 #define UV_BAU_MESSAGE 200 /* Messaging irq; see irq_64.h */
44 /* and include/asm-x86/hw_irq_64.h */
45 /* To be dynamically allocated in the future */
46 #define UV_NET_ENDPOINT_INTD 0x38
47 #define UV_DESC_BASE_PNODE_SHIFT 49 /* position of pnode (nasid>>1) in MMR */
48 #define UV_PAYLOADQ_PNODE_SHIFT 49
50 #define UV_PTC_BASENAME "sgi_uv/ptc_statistics"
51 #define uv_physnodeaddr(x) ((__pa((unsigned long)(x)) & uv_mmask))
53 /* bits in UVH_LB_BAU_SB_ACTIVATION_STATUS_0/1 */
54 #define DESC_STATUS_IDLE 0
55 #define DESC_STATUS_ACTIVE 1
56 #define DESC_STATUS_DESTINATION_TIMEOUT 2
57 #define DESC_STATUS_SOURCE_TIMEOUT 3
59 /* source side threshholds at which message retries print a warning */
60 #define SOURCE_TIMEOUT_LIMIT 20
61 #define DESTINATION_TIMEOUT_LIMIT 20
63 /* number of entries in the destination side payload queue */
64 #define DESTINATION_PAYLOAD_QUEUE_SIZE 17
65 /* number of destination side software ack resources */
66 #define DESTINATION_NUM_RESOURCES 8
67 #define MAX_CPUS_PER_NODE 32
69 /* Distribution: 32 bytes (256 bits) (bytes 0-0x1f of descriptor) */
70 /* If the 'multilevel' flag in the header portion of the descriptor
71 * has been set to 0, then endpoint multi-unicast mode is selected.
72 * The distribution specification (32 bytes) is interpreted as a 256-bit
73 * distribution vector. Adjacent bits correspond to consecutive even numbered
74 * nodeIDs. The result of adding the index of a given bit to the 15-bit
75 * 'base_dest_nodeid' field of the header corresponds to the
76 * destination nodeID associated with that specified bit. */
77 struct bau_target_nodemask
{
78 unsigned long bits
[BITS_TO_LONGS(256)];
81 /* mask of cpu's on a node */
82 /* (during initialization we need to check that unsigned long has
83 enough bits for max. cpu's per node) */
84 struct bau_local_cpumask
{
89 * Payload: 16 bytes (128 bits) (bytes 0x20-0x2f of descriptor)
90 * only 12 bytes (96 bits) of the payload area are usable.
91 * An additional 3 bytes (bits 27:4) of the header address are carried
92 * to the next bytes of the destination payload queue.
93 * And an additional 2 bytes of the header Suppl_A field are also
94 * carried to the destination payload queue.
95 * But the first byte of the Suppl_A becomes bits 127:120 (the 16th byte)
96 * of the destination payload queue, which is written by the hardware
97 * with the s/w ack resource bit vector.
98 * [ effective message contents (16 bytes (128 bits) maximum), not counting
99 * the s/w ack bit vector ]
102 /* The payload is software-defined for INTD transactions */
103 struct bau_msg_payload
{
104 unsigned long address
; /* signifies a page or all TLB's
107 unsigned short sending_cpu
; /* filled in by sender */
109 unsigned short acknowledge_count
;/* filled in by destination */
111 unsigned int reserved1
:32; /* not usable */
115 /* Message header: 16 bytes (128 bits) (bytes 0x30-0x3f of descriptor) */
116 /* see table 4.2.3.0.1 in broacast_assist spec. */
117 struct bau_msg_header
{
118 int dest_subnodeid
:6; /* must be zero */
120 int base_dest_nodeid
:15; /* nasid>>1 (pnode) of first bit in node_map */
122 int command
:8; /* message type */
124 /* 0x38: SN3net EndPoint Message */
125 int rsvd_1
:3; /* must be zero */
127 /* int will align on 32 bits */
128 int rsvd_2
:9; /* must be zero */
130 /* Suppl_A is 56-41 */
131 int payload_2a
:8; /* becomes byte 16 of msg */
132 /* bits 48:41 */ /* not currently using */
133 int payload_2b
:8; /* becomes byte 17 of msg */
134 /* bits 56:49 */ /* not currently using */
135 /* Address field (96:57) is never used as an
136 address (these are address bits 42:3) */
137 int rsvd_3
:1; /* must be zero */
139 /* address bits 27:4 are payload */
140 /* these 24 bits become bytes 12-14 of msg */
141 int replied_to
:1; /* sent as 0 by the source to byte 12 */
144 int payload_1a
:5; /* not currently used */
146 int payload_1b
:8; /* not currently used */
148 int payload_1c
:8; /* not currently used */
150 int payload_1d
:2; /* not currently used */
153 int rsvd_4
:7; /* must be zero */
155 int sw_ack_flag
:1; /* software acknowledge flag */
157 /* INTD trasactions at destination are to
158 wait for software acknowledge */
159 int rsvd_5
:6; /* must be zero */
161 int rsvd_6
:5; /* must be zero */
163 int int_both
:1; /* if 1, interrupt both sockets on the blade */
165 int fairness
:3; /* usually zero */
167 int multilevel
:1; /* multi-level multicast format */
169 /* 0 for TLB: endpoint multi-unicast messages */
170 int chaining
:1; /* next descriptor is part of this activation*/
172 int rsvd_7
:21; /* must be zero */
176 /* The format of the message to send, plus all accompanying control */
177 /* Should be 64 bytes */
178 struct bau_activation_descriptor
{
179 struct bau_target_nodemask distribution
;
180 /* message template, consisting of header and payload: */
181 struct bau_msg_header header
;
182 struct bau_msg_payload payload
;
185 * -payload-- ---------header------
186 * bytes 0-11 bits 41-56 bits 58-81
189 * A/B/C are moved to:
191 * bytes 0-11 bytes 12-14 bytes 16-17 (byte 15 filled in by hw as vector)
192 * ------------payload queue-----------
196 * The payload queue on the destination side is an array of these.
197 * With BAU_MISC_CONTROL set for software acknowledge mode, the messages
198 * are 32 bytes (2 micropackets) (256 bits) in length, but contain only 17
199 * bytes of usable data, including the sw ack vector in byte 15 (bits 127:120)
200 * (12 bytes come from bau_msg_payload, 3 from payload_1, 2 from
201 * sw_ack_vector and payload_2)
202 * "Enabling Software Acknowledgment mode (see Section 4.3.3 Software
203 * Acknowledge Processing) also selects 32 byte (17 bytes usable) payload
206 struct bau_payload_queue_entry
{
207 unsigned long address
; /* signifies a page or all TLB's
209 /* 64 bits, bytes 0-7 */
211 unsigned short sending_cpu
; /* cpu that sent the message */
212 /* 16 bits, bytes 8-9 */
214 unsigned short acknowledge_count
; /* filled in by destination */
215 /* 16 bits, bytes 10-11 */
217 unsigned short replied_to
:1; /* sent as 0 by the source */
219 unsigned short unused1
:7; /* not currently using */
220 /* 7 bits: byte 12) */
222 unsigned char unused2
[2]; /* not currently using */
225 unsigned char sw_ack_vector
; /* filled in by the hardware */
226 /* byte 15 (bits 127:120) */
228 unsigned char unused4
[3]; /* not currently using bytes 17-19 */
231 int number_of_cpus
; /* filled in at destination */
232 /* 32 bits, bytes 20-23 (aligned) */
234 unsigned char unused5
[8]; /* not using */
238 /* one for every slot in the destination payload queue */
239 struct bau_msg_status
{
240 struct bau_local_cpumask seen_by
; /* map of cpu's */
243 /* one for every slot in the destination software ack resources */
244 struct bau_sw_ack_status
{
245 struct bau_payload_queue_entry
*msg
; /* associated message */
246 int watcher
; /* cpu monitoring, or -1 */
249 /* one on every node and per-cpu; to locate the software tables */
251 struct bau_activation_descriptor
*descriptor_base
;
252 struct bau_payload_queue_entry
*bau_msg_head
;
253 struct bau_payload_queue_entry
*va_queue_first
;
254 struct bau_payload_queue_entry
*va_queue_last
;
255 struct bau_msg_status
*msg_statuses
;
256 int *watching
; /* pointer to array */
260 * This structure is allocated per_cpu for UV TLB shootdown statistics.
263 unsigned long ptc_i
; /* number of IPI-style flushes */
264 unsigned long requestor
; /* number of nodes this cpu sent to */
265 unsigned long requestee
; /* times cpu was remotely requested */
266 unsigned long alltlb
; /* times all tlb's on this cpu were flushed */
267 unsigned long onetlb
; /* times just one tlb on this cpu was flushed */
268 unsigned long s_retry
; /* retries on source side timeouts */
269 unsigned long d_retry
; /* retries on destination side timeouts */
270 unsigned long sflush_ns
;/* nanoseconds spent in uv_flush_tlb_others */
271 unsigned long dflush_ns
;/* nanoseconds spent destination side */
272 unsigned long retriesok
; /* successes on retries */
273 unsigned long nomsg
; /* interrupts with no message */
274 unsigned long multmsg
; /* interrupts with multiple messages */
275 unsigned long ntargeted
;/* nodes targeted */
278 static inline int bau_node_isset(int node
, struct bau_target_nodemask
*dstp
)
280 return constant_test_bit(node
, &dstp
->bits
[0]);
282 static inline void bau_node_set(int node
, struct bau_target_nodemask
*dstp
)
284 __set_bit(node
, &dstp
->bits
[0]);
286 static inline void bau_nodes_clear(struct bau_target_nodemask
*dstp
, int nbits
)
288 bitmap_zero(&dstp
->bits
[0], nbits
);
291 static inline void bau_cpubits_clear(struct bau_local_cpumask
*dstp
, int nbits
)
293 bitmap_zero(&dstp
->bits
, nbits
);
297 * atomic increment of a short integer
298 * (rather than using the __sync_add_and_fetch() intrinsic)
300 * returns the new value of the variable
302 static inline short int atomic_inc_short(short int *v
)
304 asm volatile("movw $1, %%cx\n"
305 "lock ; xaddw %%cx, %0\n"
306 : "+m" (*v
) /* outputs */
307 : : "%cx", "memory"); /* inputs : clobbereds */
312 * atomic OR of two long integers
313 * (rather than using the __sync_or_and_fetch() intrinsic)
315 static inline void atomic_or_long(unsigned long *v1
, unsigned long v2
)
317 asm volatile("movq %0, %%rax; lea %1, %%rdx\n"
318 "lock ; orq %%rax, %%rdx\n"
319 : "+m" (*v1
) /* outputs */
320 : "m" (v1
), "m" (v2
) /* inputs */
321 : "memory"); /* clobbereds */
324 #define cpubit_isset(cpu, bau_local_cpumask) \
325 test_bit((cpu), (bau_local_cpumask).bits)
327 int uv_flush_tlb_others(cpumask_t
*, struct mm_struct
*, unsigned long);
328 void uv_bau_message_intr1(void);
329 void uv_bau_timeout_intr1(void);
331 #endif /* __ASM_X86_UV_BAU__ */