Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 1 | /* |
| 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 |
| 4 | * for more details. |
| 5 | * |
Dean Nelson | 361916a | 2009-02-04 15:12:24 -0800 | [diff] [blame] | 6 | * Copyright (c) 2008-2009 Silicon Graphics, Inc. All Rights Reserved. |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | /* |
| 10 | * Cross Partition Communication (XPC) uv-based functions. |
| 11 | * |
| 12 | * Architecture specific implementation of common functions. |
| 13 | * |
| 14 | */ |
| 15 | |
| 16 | #include <linux/kernel.h> |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 17 | #include <linux/mm.h> |
| 18 | #include <linux/interrupt.h> |
| 19 | #include <linux/delay.h> |
| 20 | #include <linux/device.h> |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 21 | #include <linux/err.h> |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 22 | #include <asm/uv/uv_hub.h> |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 23 | #if defined CONFIG_X86_64 |
| 24 | #include <asm/uv/bios.h> |
| 25 | #include <asm/uv/uv_irq.h> |
| 26 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
| 27 | #include <asm/sn/intr.h> |
| 28 | #include <asm/sn/sn_sal.h> |
| 29 | #endif |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 30 | #include "../sgi-gru/gru.h" |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 31 | #include "../sgi-gru/grukservices.h" |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 32 | #include "xpc.h" |
| 33 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 34 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
| 35 | struct uv_IO_APIC_route_entry { |
| 36 | __u64 vector : 8, |
| 37 | delivery_mode : 3, |
| 38 | dest_mode : 1, |
| 39 | delivery_status : 1, |
| 40 | polarity : 1, |
| 41 | __reserved_1 : 1, |
| 42 | trigger : 1, |
| 43 | mask : 1, |
| 44 | __reserved_2 : 15, |
| 45 | dest : 32; |
| 46 | }; |
| 47 | #endif |
| 48 | |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 49 | static struct xpc_heartbeat_uv *xpc_heartbeat_uv; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 50 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 51 | #define XPC_ACTIVATE_MSG_SIZE_UV (1 * GRU_CACHE_LINE_BYTES) |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 52 | #define XPC_ACTIVATE_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ |
| 53 | XPC_ACTIVATE_MSG_SIZE_UV) |
| 54 | #define XPC_ACTIVATE_IRQ_NAME "xpc_activate" |
| 55 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 56 | #define XPC_NOTIFY_MSG_SIZE_UV (2 * GRU_CACHE_LINE_BYTES) |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 57 | #define XPC_NOTIFY_MQ_SIZE_UV (4 * XP_MAX_NPARTITIONS_UV * \ |
| 58 | XPC_NOTIFY_MSG_SIZE_UV) |
| 59 | #define XPC_NOTIFY_IRQ_NAME "xpc_notify" |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 60 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 61 | static struct xpc_gru_mq_uv *xpc_activate_mq_uv; |
| 62 | static struct xpc_gru_mq_uv *xpc_notify_mq_uv; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 63 | |
| 64 | static int |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 65 | xpc_setup_partitions_uv(void) |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 66 | { |
| 67 | short partid; |
| 68 | struct xpc_partition_uv *part_uv; |
| 69 | |
| 70 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { |
| 71 | part_uv = &xpc_partitions[partid].sn.uv; |
| 72 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 73 | mutex_init(&part_uv->cached_activate_gru_mq_desc_mutex); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 74 | spin_lock_init(&part_uv->flags_lock); |
| 75 | part_uv->remote_act_state = XPC_P_AS_INACTIVE; |
| 76 | } |
| 77 | return 0; |
| 78 | } |
| 79 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 80 | static void |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 81 | xpc_teardown_partitions_uv(void) |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 82 | { |
| 83 | short partid; |
| 84 | struct xpc_partition_uv *part_uv; |
| 85 | unsigned long irq_flags; |
| 86 | |
| 87 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { |
| 88 | part_uv = &xpc_partitions[partid].sn.uv; |
| 89 | |
| 90 | if (part_uv->cached_activate_gru_mq_desc != NULL) { |
| 91 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); |
| 92 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); |
| 93 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; |
| 94 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); |
| 95 | kfree(part_uv->cached_activate_gru_mq_desc); |
| 96 | part_uv->cached_activate_gru_mq_desc = NULL; |
| 97 | mutex_unlock(&part_uv-> |
| 98 | cached_activate_gru_mq_desc_mutex); |
| 99 | } |
| 100 | } |
| 101 | } |
| 102 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 103 | static int |
| 104 | xpc_get_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq, int cpu, char *irq_name) |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 105 | { |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 106 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
| 107 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 108 | #if defined CONFIG_X86_64 |
Dimitri Sivanich | 6c2c502 | 2009-09-30 11:02:59 -0500 | [diff] [blame] | 109 | mq->irq = uv_setup_irq(irq_name, cpu, mq->mmr_blade, mq->mmr_offset, |
| 110 | UV_AFFINITY_CPU); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 111 | if (mq->irq < 0) { |
| 112 | dev_err(xpc_part, "uv_setup_irq() returned error=%d\n", |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 113 | -mq->irq); |
| 114 | return mq->irq; |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 115 | } |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 116 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 117 | mq->mmr_value = uv_read_global_mmr64(mmr_pnode, mq->mmr_offset); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 118 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 119 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 120 | if (strcmp(irq_name, XPC_ACTIVATE_IRQ_NAME) == 0) |
| 121 | mq->irq = SGI_XPC_ACTIVATE; |
| 122 | else if (strcmp(irq_name, XPC_NOTIFY_IRQ_NAME) == 0) |
| 123 | mq->irq = SGI_XPC_NOTIFY; |
| 124 | else |
| 125 | return -EINVAL; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 126 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 127 | mq->mmr_value = (unsigned long)cpu_physical_id(cpu) << 32 | mq->irq; |
| 128 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mq->mmr_value); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 129 | #else |
| 130 | #error not a supported configuration |
| 131 | #endif |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 132 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 133 | return 0; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 134 | } |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 135 | |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 136 | static void |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 137 | xpc_release_gru_mq_irq_uv(struct xpc_gru_mq_uv *mq) |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 138 | { |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 139 | #if defined CONFIG_X86_64 |
Dimitri Sivanich | 6c2c502 | 2009-09-30 11:02:59 -0500 | [diff] [blame] | 140 | uv_teardown_irq(mq->irq); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 141 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 142 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
| 143 | int mmr_pnode; |
| 144 | unsigned long mmr_value; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 145 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 146 | mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
| 147 | mmr_value = 1UL << 16; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 148 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 149 | uv_write_global_mmr64(mmr_pnode, mq->mmr_offset, mmr_value); |
| 150 | #else |
| 151 | #error not a supported configuration |
| 152 | #endif |
| 153 | } |
| 154 | |
| 155 | static int |
| 156 | xpc_gru_mq_watchlist_alloc_uv(struct xpc_gru_mq_uv *mq) |
| 157 | { |
| 158 | int ret; |
| 159 | |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 160 | #if defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
| 161 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
| 162 | |
| 163 | ret = sn_mq_watchlist_alloc(mmr_pnode, (void *)uv_gpa(mq->address), |
Russ Anderson | c8182f0 | 2008-12-12 11:07:00 -0600 | [diff] [blame] | 164 | mq->order, &mq->mmr_offset); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 165 | if (ret < 0) { |
| 166 | dev_err(xpc_part, "sn_mq_watchlist_alloc() failed, ret=%d\n", |
| 167 | ret); |
| 168 | return -EBUSY; |
| 169 | } |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 170 | #elif defined CONFIG_X86_64 |
| 171 | ret = uv_bios_mq_watchlist_alloc(uv_gpa(mq->address), |
| 172 | mq->order, &mq->mmr_offset); |
| 173 | if (ret < 0) { |
| 174 | dev_err(xpc_part, "uv_bios_mq_watchlist_alloc() failed, " |
| 175 | "ret=%d\n", ret); |
| 176 | return ret; |
| 177 | } |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 178 | #else |
| 179 | #error not a supported configuration |
| 180 | #endif |
| 181 | |
| 182 | mq->watchlist_num = ret; |
| 183 | return 0; |
| 184 | } |
| 185 | |
| 186 | static void |
| 187 | xpc_gru_mq_watchlist_free_uv(struct xpc_gru_mq_uv *mq) |
| 188 | { |
| 189 | int ret; |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 190 | int mmr_pnode = uv_blade_to_pnode(mq->mmr_blade); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 191 | |
| 192 | #if defined CONFIG_X86_64 |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 193 | ret = uv_bios_mq_watchlist_free(mmr_pnode, mq->watchlist_num); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 194 | BUG_ON(ret != BIOS_STATUS_SUCCESS); |
| 195 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 196 | ret = sn_mq_watchlist_free(mmr_pnode, mq->watchlist_num); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 197 | BUG_ON(ret != SALRET_OK); |
| 198 | #else |
| 199 | #error not a supported configuration |
| 200 | #endif |
| 201 | } |
| 202 | |
| 203 | static struct xpc_gru_mq_uv * |
| 204 | xpc_create_gru_mq_uv(unsigned int mq_size, int cpu, char *irq_name, |
| 205 | irq_handler_t irq_handler) |
| 206 | { |
| 207 | enum xp_retval xp_ret; |
| 208 | int ret; |
| 209 | int nid; |
Robin Holt | 57e6d25 | 2009-12-15 16:48:00 -0800 | [diff] [blame] | 210 | int nasid; |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 211 | int pg_order; |
| 212 | struct page *page; |
| 213 | struct xpc_gru_mq_uv *mq; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 214 | struct uv_IO_APIC_route_entry *mmr_value; |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 215 | |
| 216 | mq = kmalloc(sizeof(struct xpc_gru_mq_uv), GFP_KERNEL); |
| 217 | if (mq == NULL) { |
| 218 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " |
| 219 | "a xpc_gru_mq_uv structure\n"); |
| 220 | ret = -ENOMEM; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 221 | goto out_0; |
| 222 | } |
| 223 | |
| 224 | mq->gru_mq_desc = kzalloc(sizeof(struct gru_message_queue_desc), |
| 225 | GFP_KERNEL); |
| 226 | if (mq->gru_mq_desc == NULL) { |
| 227 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to kmalloc() " |
| 228 | "a gru_message_queue_desc structure\n"); |
| 229 | ret = -ENOMEM; |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 230 | goto out_1; |
| 231 | } |
| 232 | |
| 233 | pg_order = get_order(mq_size); |
| 234 | mq->order = pg_order + PAGE_SHIFT; |
| 235 | mq_size = 1UL << mq->order; |
| 236 | |
| 237 | mq->mmr_blade = uv_cpu_to_blade_id(cpu); |
| 238 | |
| 239 | nid = cpu_to_node(cpu); |
Mel Gorman | 6484eb3 | 2009-06-16 15:31:54 -0700 | [diff] [blame] | 240 | page = alloc_pages_exact_node(nid, GFP_KERNEL | __GFP_ZERO | GFP_THISNODE, |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 241 | pg_order); |
| 242 | if (page == NULL) { |
| 243 | dev_err(xpc_part, "xpc_create_gru_mq_uv() failed to alloc %d " |
| 244 | "bytes of memory on nid=%d for GRU mq\n", mq_size, nid); |
| 245 | ret = -ENOMEM; |
| 246 | goto out_2; |
| 247 | } |
| 248 | mq->address = page_address(page); |
| 249 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 250 | /* enable generation of irq when GRU mq operation occurs to this mq */ |
| 251 | ret = xpc_gru_mq_watchlist_alloc_uv(mq); |
| 252 | if (ret != 0) |
| 253 | goto out_3; |
| 254 | |
| 255 | ret = xpc_get_gru_mq_irq_uv(mq, cpu, irq_name); |
| 256 | if (ret != 0) |
| 257 | goto out_4; |
| 258 | |
| 259 | ret = request_irq(mq->irq, irq_handler, 0, irq_name, NULL); |
| 260 | if (ret != 0) { |
| 261 | dev_err(xpc_part, "request_irq(irq=%d) returned error=%d\n", |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 262 | mq->irq, -ret); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 263 | goto out_5; |
| 264 | } |
| 265 | |
Robin Holt | 57e6d25 | 2009-12-15 16:48:00 -0800 | [diff] [blame] | 266 | nasid = UV_PNODE_TO_NASID(uv_cpu_to_pnode(cpu)); |
| 267 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 268 | mmr_value = (struct uv_IO_APIC_route_entry *)&mq->mmr_value; |
| 269 | ret = gru_create_message_queue(mq->gru_mq_desc, mq->address, mq_size, |
Robin Holt | 57e6d25 | 2009-12-15 16:48:00 -0800 | [diff] [blame] | 270 | nasid, mmr_value->vector, mmr_value->dest); |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 271 | if (ret != 0) { |
| 272 | dev_err(xpc_part, "gru_create_message_queue() returned " |
| 273 | "error=%d\n", ret); |
| 274 | ret = -EINVAL; |
| 275 | goto out_6; |
| 276 | } |
| 277 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 278 | /* allow other partitions to access this GRU mq */ |
| 279 | xp_ret = xp_expand_memprotect(xp_pa(mq->address), mq_size); |
| 280 | if (xp_ret != xpSuccess) { |
| 281 | ret = -EACCES; |
| 282 | goto out_6; |
| 283 | } |
| 284 | |
| 285 | return mq; |
| 286 | |
| 287 | /* something went wrong */ |
| 288 | out_6: |
| 289 | free_irq(mq->irq, NULL); |
| 290 | out_5: |
| 291 | xpc_release_gru_mq_irq_uv(mq); |
| 292 | out_4: |
| 293 | xpc_gru_mq_watchlist_free_uv(mq); |
| 294 | out_3: |
| 295 | free_pages((unsigned long)mq->address, pg_order); |
| 296 | out_2: |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 297 | kfree(mq->gru_mq_desc); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 298 | out_1: |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 299 | kfree(mq); |
| 300 | out_0: |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 301 | return ERR_PTR(ret); |
| 302 | } |
| 303 | |
| 304 | static void |
| 305 | xpc_destroy_gru_mq_uv(struct xpc_gru_mq_uv *mq) |
| 306 | { |
| 307 | unsigned int mq_size; |
| 308 | int pg_order; |
| 309 | int ret; |
| 310 | |
| 311 | /* disallow other partitions to access GRU mq */ |
| 312 | mq_size = 1UL << mq->order; |
| 313 | ret = xp_restrict_memprotect(xp_pa(mq->address), mq_size); |
| 314 | BUG_ON(ret != xpSuccess); |
| 315 | |
| 316 | /* unregister irq handler and release mq irq/vector mapping */ |
| 317 | free_irq(mq->irq, NULL); |
| 318 | xpc_release_gru_mq_irq_uv(mq); |
| 319 | |
| 320 | /* disable generation of irq when GRU mq op occurs to this mq */ |
| 321 | xpc_gru_mq_watchlist_free_uv(mq); |
| 322 | |
| 323 | pg_order = mq->order - PAGE_SHIFT; |
| 324 | free_pages((unsigned long)mq->address, pg_order); |
| 325 | |
| 326 | kfree(mq); |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 327 | } |
| 328 | |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 329 | static enum xp_retval |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 330 | xpc_send_gru_msg(struct gru_message_queue_desc *gru_mq_desc, void *msg, |
| 331 | size_t msg_size) |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 332 | { |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 333 | enum xp_retval xp_ret; |
| 334 | int ret; |
| 335 | |
| 336 | while (1) { |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 337 | ret = gru_send_message_gpa(gru_mq_desc, msg, msg_size); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 338 | if (ret == MQE_OK) { |
| 339 | xp_ret = xpSuccess; |
| 340 | break; |
| 341 | } |
| 342 | |
| 343 | if (ret == MQE_QUEUE_FULL) { |
| 344 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " |
| 345 | "error=MQE_QUEUE_FULL\n"); |
| 346 | /* !!! handle QLimit reached; delay & try again */ |
| 347 | /* ??? Do we add a limit to the number of retries? */ |
| 348 | (void)msleep_interruptible(10); |
| 349 | } else if (ret == MQE_CONGESTION) { |
| 350 | dev_dbg(xpc_chan, "gru_send_message_gpa() returned " |
| 351 | "error=MQE_CONGESTION\n"); |
| 352 | /* !!! handle LB Overflow; simply try again */ |
| 353 | /* ??? Do we add a limit to the number of retries? */ |
| 354 | } else { |
| 355 | /* !!! Currently this is MQE_UNEXPECTED_CB_ERR */ |
| 356 | dev_err(xpc_chan, "gru_send_message_gpa() returned " |
| 357 | "error=%d\n", ret); |
| 358 | xp_ret = xpGruSendMqError; |
| 359 | break; |
| 360 | } |
| 361 | } |
| 362 | return xp_ret; |
| 363 | } |
| 364 | |
| 365 | static void |
| 366 | xpc_process_activate_IRQ_rcvd_uv(void) |
| 367 | { |
| 368 | unsigned long irq_flags; |
| 369 | short partid; |
| 370 | struct xpc_partition *part; |
| 371 | u8 act_state_req; |
| 372 | |
| 373 | DBUG_ON(xpc_activate_IRQ_rcvd == 0); |
| 374 | |
| 375 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 376 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { |
| 377 | part = &xpc_partitions[partid]; |
| 378 | |
| 379 | if (part->sn.uv.act_state_req == 0) |
| 380 | continue; |
| 381 | |
| 382 | xpc_activate_IRQ_rcvd--; |
| 383 | BUG_ON(xpc_activate_IRQ_rcvd < 0); |
| 384 | |
| 385 | act_state_req = part->sn.uv.act_state_req; |
| 386 | part->sn.uv.act_state_req = 0; |
| 387 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 388 | |
| 389 | if (act_state_req == XPC_P_ASR_ACTIVATE_UV) { |
| 390 | if (part->act_state == XPC_P_AS_INACTIVE) |
| 391 | xpc_activate_partition(part); |
| 392 | else if (part->act_state == XPC_P_AS_DEACTIVATING) |
| 393 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); |
| 394 | |
| 395 | } else if (act_state_req == XPC_P_ASR_REACTIVATE_UV) { |
| 396 | if (part->act_state == XPC_P_AS_INACTIVE) |
| 397 | xpc_activate_partition(part); |
| 398 | else |
| 399 | XPC_DEACTIVATE_PARTITION(part, xpReactivating); |
| 400 | |
| 401 | } else if (act_state_req == XPC_P_ASR_DEACTIVATE_UV) { |
| 402 | XPC_DEACTIVATE_PARTITION(part, part->sn.uv.reason); |
| 403 | |
| 404 | } else { |
| 405 | BUG(); |
| 406 | } |
| 407 | |
| 408 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 409 | if (xpc_activate_IRQ_rcvd == 0) |
| 410 | break; |
| 411 | } |
| 412 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 413 | |
| 414 | } |
| 415 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 416 | static void |
| 417 | xpc_handle_activate_mq_msg_uv(struct xpc_partition *part, |
| 418 | struct xpc_activate_mq_msghdr_uv *msg_hdr, |
| 419 | int *wakeup_hb_checker) |
| 420 | { |
| 421 | unsigned long irq_flags; |
| 422 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
| 423 | struct xpc_openclose_args *args; |
| 424 | |
| 425 | part_uv->remote_act_state = msg_hdr->act_state; |
| 426 | |
| 427 | switch (msg_hdr->type) { |
| 428 | case XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV: |
| 429 | /* syncing of remote_act_state was just done above */ |
| 430 | break; |
| 431 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 432 | case XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV: { |
| 433 | struct xpc_activate_mq_msg_activate_req_uv *msg; |
| 434 | |
| 435 | /* |
| 436 | * ??? Do we deal here with ts_jiffies being different |
| 437 | * ??? if act_state != XPC_P_AS_INACTIVE instead of |
| 438 | * ??? below? |
| 439 | */ |
| 440 | msg = container_of(msg_hdr, struct |
| 441 | xpc_activate_mq_msg_activate_req_uv, hdr); |
| 442 | |
| 443 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 444 | if (part_uv->act_state_req == 0) |
| 445 | xpc_activate_IRQ_rcvd++; |
| 446 | part_uv->act_state_req = XPC_P_ASR_ACTIVATE_UV; |
| 447 | part->remote_rp_pa = msg->rp_gpa; /* !!! _pa is _gpa */ |
| 448 | part->remote_rp_ts_jiffies = msg_hdr->rp_ts_jiffies; |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 449 | part_uv->heartbeat_gpa = msg->heartbeat_gpa; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 450 | |
| 451 | if (msg->activate_gru_mq_desc_gpa != |
| 452 | part_uv->activate_gru_mq_desc_gpa) { |
| 453 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); |
| 454 | part_uv->flags &= ~XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; |
| 455 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); |
| 456 | part_uv->activate_gru_mq_desc_gpa = |
| 457 | msg->activate_gru_mq_desc_gpa; |
| 458 | } |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 459 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 460 | |
| 461 | (*wakeup_hb_checker)++; |
| 462 | break; |
| 463 | } |
| 464 | case XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV: { |
| 465 | struct xpc_activate_mq_msg_deactivate_req_uv *msg; |
| 466 | |
| 467 | msg = container_of(msg_hdr, struct |
| 468 | xpc_activate_mq_msg_deactivate_req_uv, hdr); |
| 469 | |
| 470 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 471 | if (part_uv->act_state_req == 0) |
| 472 | xpc_activate_IRQ_rcvd++; |
| 473 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; |
| 474 | part_uv->reason = msg->reason; |
| 475 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 476 | |
| 477 | (*wakeup_hb_checker)++; |
| 478 | return; |
| 479 | } |
| 480 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV: { |
| 481 | struct xpc_activate_mq_msg_chctl_closerequest_uv *msg; |
| 482 | |
| 483 | msg = container_of(msg_hdr, struct |
| 484 | xpc_activate_mq_msg_chctl_closerequest_uv, |
| 485 | hdr); |
| 486 | args = &part->remote_openclose_args[msg->ch_number]; |
| 487 | args->reason = msg->reason; |
| 488 | |
| 489 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
| 490 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREQUEST; |
| 491 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); |
| 492 | |
| 493 | xpc_wakeup_channel_mgr(part); |
| 494 | break; |
| 495 | } |
| 496 | case XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV: { |
| 497 | struct xpc_activate_mq_msg_chctl_closereply_uv *msg; |
| 498 | |
| 499 | msg = container_of(msg_hdr, struct |
| 500 | xpc_activate_mq_msg_chctl_closereply_uv, |
| 501 | hdr); |
| 502 | |
| 503 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
| 504 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_CLOSEREPLY; |
| 505 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); |
| 506 | |
| 507 | xpc_wakeup_channel_mgr(part); |
| 508 | break; |
| 509 | } |
| 510 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV: { |
| 511 | struct xpc_activate_mq_msg_chctl_openrequest_uv *msg; |
| 512 | |
| 513 | msg = container_of(msg_hdr, struct |
| 514 | xpc_activate_mq_msg_chctl_openrequest_uv, |
| 515 | hdr); |
| 516 | args = &part->remote_openclose_args[msg->ch_number]; |
| 517 | args->entry_size = msg->entry_size; |
| 518 | args->local_nentries = msg->local_nentries; |
| 519 | |
| 520 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
| 521 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREQUEST; |
| 522 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); |
| 523 | |
| 524 | xpc_wakeup_channel_mgr(part); |
| 525 | break; |
| 526 | } |
| 527 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV: { |
| 528 | struct xpc_activate_mq_msg_chctl_openreply_uv *msg; |
| 529 | |
| 530 | msg = container_of(msg_hdr, struct |
| 531 | xpc_activate_mq_msg_chctl_openreply_uv, hdr); |
| 532 | args = &part->remote_openclose_args[msg->ch_number]; |
| 533 | args->remote_nentries = msg->remote_nentries; |
| 534 | args->local_nentries = msg->local_nentries; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 535 | args->local_msgqueue_pa = msg->notify_gru_mq_desc_gpa; |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 536 | |
| 537 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
| 538 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENREPLY; |
| 539 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); |
| 540 | |
| 541 | xpc_wakeup_channel_mgr(part); |
| 542 | break; |
| 543 | } |
Robin Holt | efdd06e | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 544 | case XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV: { |
| 545 | struct xpc_activate_mq_msg_chctl_opencomplete_uv *msg; |
| 546 | |
| 547 | msg = container_of(msg_hdr, struct |
| 548 | xpc_activate_mq_msg_chctl_opencomplete_uv, hdr); |
| 549 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
| 550 | part->chctl.flags[msg->ch_number] |= XPC_CHCTL_OPENCOMPLETE; |
| 551 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); |
| 552 | |
| 553 | xpc_wakeup_channel_mgr(part); |
| 554 | } |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 555 | case XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV: |
| 556 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); |
| 557 | part_uv->flags |= XPC_P_ENGAGED_UV; |
| 558 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); |
| 559 | break; |
| 560 | |
| 561 | case XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV: |
| 562 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); |
| 563 | part_uv->flags &= ~XPC_P_ENGAGED_UV; |
| 564 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); |
| 565 | break; |
| 566 | |
| 567 | default: |
| 568 | dev_err(xpc_part, "received unknown activate_mq msg type=%d " |
| 569 | "from partition=%d\n", msg_hdr->type, XPC_PARTID(part)); |
| 570 | |
| 571 | /* get hb checker to deactivate from the remote partition */ |
| 572 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 573 | if (part_uv->act_state_req == 0) |
| 574 | xpc_activate_IRQ_rcvd++; |
| 575 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; |
| 576 | part_uv->reason = xpBadMsgType; |
| 577 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 578 | |
| 579 | (*wakeup_hb_checker)++; |
| 580 | return; |
| 581 | } |
| 582 | |
| 583 | if (msg_hdr->rp_ts_jiffies != part->remote_rp_ts_jiffies && |
| 584 | part->remote_rp_ts_jiffies != 0) { |
| 585 | /* |
| 586 | * ??? Does what we do here need to be sensitive to |
| 587 | * ??? act_state or remote_act_state? |
| 588 | */ |
| 589 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 590 | if (part_uv->act_state_req == 0) |
| 591 | xpc_activate_IRQ_rcvd++; |
| 592 | part_uv->act_state_req = XPC_P_ASR_REACTIVATE_UV; |
| 593 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 594 | |
| 595 | (*wakeup_hb_checker)++; |
| 596 | } |
| 597 | } |
| 598 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 599 | static irqreturn_t |
| 600 | xpc_handle_activate_IRQ_uv(int irq, void *dev_id) |
| 601 | { |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 602 | struct xpc_activate_mq_msghdr_uv *msg_hdr; |
| 603 | short partid; |
| 604 | struct xpc_partition *part; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 605 | int wakeup_hb_checker = 0; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 606 | int part_referenced; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 607 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 608 | while (1) { |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 609 | msg_hdr = gru_get_next_message(xpc_activate_mq_uv->gru_mq_desc); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 610 | if (msg_hdr == NULL) |
| 611 | break; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 612 | |
| 613 | partid = msg_hdr->partid; |
| 614 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 615 | dev_err(xpc_part, "xpc_handle_activate_IRQ_uv() " |
| 616 | "received invalid partid=0x%x in message\n", |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 617 | partid); |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 618 | } else { |
| 619 | part = &xpc_partitions[partid]; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 620 | |
| 621 | part_referenced = xpc_part_ref(part); |
| 622 | xpc_handle_activate_mq_msg_uv(part, msg_hdr, |
| 623 | &wakeup_hb_checker); |
| 624 | if (part_referenced) |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 625 | xpc_part_deref(part); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 626 | } |
| 627 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 628 | gru_free_message(xpc_activate_mq_uv->gru_mq_desc, msg_hdr); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | if (wakeup_hb_checker) |
| 632 | wake_up_interruptible(&xpc_activate_IRQ_wq); |
| 633 | |
| 634 | return IRQ_HANDLED; |
| 635 | } |
| 636 | |
| 637 | static enum xp_retval |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 638 | xpc_cache_remote_gru_mq_desc_uv(struct gru_message_queue_desc *gru_mq_desc, |
| 639 | unsigned long gru_mq_desc_gpa) |
| 640 | { |
| 641 | enum xp_retval ret; |
| 642 | |
| 643 | ret = xp_remote_memcpy(uv_gpa(gru_mq_desc), gru_mq_desc_gpa, |
| 644 | sizeof(struct gru_message_queue_desc)); |
| 645 | if (ret == xpSuccess) |
| 646 | gru_mq_desc->mq = NULL; |
| 647 | |
| 648 | return ret; |
| 649 | } |
| 650 | |
| 651 | static enum xp_retval |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 652 | xpc_send_activate_IRQ_uv(struct xpc_partition *part, void *msg, size_t msg_size, |
| 653 | int msg_type) |
| 654 | { |
| 655 | struct xpc_activate_mq_msghdr_uv *msg_hdr = msg; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 656 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
| 657 | struct gru_message_queue_desc *gru_mq_desc; |
| 658 | unsigned long irq_flags; |
| 659 | enum xp_retval ret; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 660 | |
| 661 | DBUG_ON(msg_size > XPC_ACTIVATE_MSG_SIZE_UV); |
| 662 | |
| 663 | msg_hdr->type = msg_type; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 664 | msg_hdr->partid = xp_partition_id; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 665 | msg_hdr->act_state = part->act_state; |
| 666 | msg_hdr->rp_ts_jiffies = xpc_rsvd_page->ts_jiffies; |
| 667 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 668 | mutex_lock(&part_uv->cached_activate_gru_mq_desc_mutex); |
| 669 | again: |
| 670 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) { |
| 671 | gru_mq_desc = part_uv->cached_activate_gru_mq_desc; |
| 672 | if (gru_mq_desc == NULL) { |
| 673 | gru_mq_desc = kmalloc(sizeof(struct |
| 674 | gru_message_queue_desc), |
| 675 | GFP_KERNEL); |
| 676 | if (gru_mq_desc == NULL) { |
| 677 | ret = xpNoMemory; |
| 678 | goto done; |
| 679 | } |
| 680 | part_uv->cached_activate_gru_mq_desc = gru_mq_desc; |
| 681 | } |
| 682 | |
| 683 | ret = xpc_cache_remote_gru_mq_desc_uv(gru_mq_desc, |
| 684 | part_uv-> |
| 685 | activate_gru_mq_desc_gpa); |
| 686 | if (ret != xpSuccess) |
| 687 | goto done; |
| 688 | |
| 689 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); |
| 690 | part_uv->flags |= XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV; |
| 691 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); |
| 692 | } |
| 693 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 694 | /* ??? Is holding a spin_lock (ch->lock) during this call a bad idea? */ |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 695 | ret = xpc_send_gru_msg(part_uv->cached_activate_gru_mq_desc, msg, |
| 696 | msg_size); |
| 697 | if (ret != xpSuccess) { |
| 698 | smp_rmb(); /* ensure a fresh copy of part_uv->flags */ |
| 699 | if (!(part_uv->flags & XPC_P_CACHED_ACTIVATE_GRU_MQ_DESC_UV)) |
| 700 | goto again; |
| 701 | } |
| 702 | done: |
| 703 | mutex_unlock(&part_uv->cached_activate_gru_mq_desc_mutex); |
| 704 | return ret; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 705 | } |
| 706 | |
| 707 | static void |
| 708 | xpc_send_activate_IRQ_part_uv(struct xpc_partition *part, void *msg, |
| 709 | size_t msg_size, int msg_type) |
| 710 | { |
| 711 | enum xp_retval ret; |
| 712 | |
| 713 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); |
| 714 | if (unlikely(ret != xpSuccess)) |
| 715 | XPC_DEACTIVATE_PARTITION(part, ret); |
| 716 | } |
| 717 | |
| 718 | static void |
| 719 | xpc_send_activate_IRQ_ch_uv(struct xpc_channel *ch, unsigned long *irq_flags, |
| 720 | void *msg, size_t msg_size, int msg_type) |
| 721 | { |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 722 | struct xpc_partition *part = &xpc_partitions[ch->partid]; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 723 | enum xp_retval ret; |
| 724 | |
| 725 | ret = xpc_send_activate_IRQ_uv(part, msg, msg_size, msg_type); |
| 726 | if (unlikely(ret != xpSuccess)) { |
| 727 | if (irq_flags != NULL) |
| 728 | spin_unlock_irqrestore(&ch->lock, *irq_flags); |
| 729 | |
| 730 | XPC_DEACTIVATE_PARTITION(part, ret); |
| 731 | |
| 732 | if (irq_flags != NULL) |
| 733 | spin_lock_irqsave(&ch->lock, *irq_flags); |
| 734 | } |
| 735 | } |
| 736 | |
| 737 | static void |
| 738 | xpc_send_local_activate_IRQ_uv(struct xpc_partition *part, int act_state_req) |
| 739 | { |
| 740 | unsigned long irq_flags; |
| 741 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
| 742 | |
| 743 | /* |
Dean Nelson | 7d9d1f2 | 2008-11-05 17:29:48 -0600 | [diff] [blame] | 744 | * !!! Make our side think that the remote partition sent an activate |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 745 | * !!! mq message our way by doing what the activate IRQ handler would |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 746 | * !!! do had one really been sent. |
| 747 | */ |
| 748 | |
| 749 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 750 | if (part_uv->act_state_req == 0) |
| 751 | xpc_activate_IRQ_rcvd++; |
| 752 | part_uv->act_state_req = act_state_req; |
| 753 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 754 | |
| 755 | wake_up_interruptible(&xpc_activate_IRQ_wq); |
| 756 | } |
| 757 | |
| 758 | static enum xp_retval |
| 759 | xpc_get_partition_rsvd_page_pa_uv(void *buf, u64 *cookie, unsigned long *rp_pa, |
| 760 | size_t *len) |
| 761 | { |
Dean Nelson | 7d9d1f2 | 2008-11-05 17:29:48 -0600 | [diff] [blame] | 762 | s64 status; |
| 763 | enum xp_retval ret; |
| 764 | |
| 765 | #if defined CONFIG_X86_64 |
| 766 | status = uv_bios_reserved_page_pa((u64)buf, cookie, (u64 *)rp_pa, |
| 767 | (u64 *)len); |
| 768 | if (status == BIOS_STATUS_SUCCESS) |
| 769 | ret = xpSuccess; |
| 770 | else if (status == BIOS_STATUS_MORE_PASSES) |
| 771 | ret = xpNeedMoreInfo; |
| 772 | else |
| 773 | ret = xpBiosError; |
| 774 | |
| 775 | #elif defined CONFIG_IA64_GENERIC || defined CONFIG_IA64_SGI_UV |
| 776 | status = sn_partition_reserved_page_pa((u64)buf, cookie, rp_pa, len); |
| 777 | if (status == SALRET_OK) |
| 778 | ret = xpSuccess; |
| 779 | else if (status == SALRET_MORE_PASSES) |
| 780 | ret = xpNeedMoreInfo; |
| 781 | else |
| 782 | ret = xpSalError; |
| 783 | |
| 784 | #else |
| 785 | #error not a supported configuration |
| 786 | #endif |
| 787 | |
| 788 | return ret; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 789 | } |
| 790 | |
| 791 | static int |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 792 | xpc_setup_rsvd_page_uv(struct xpc_rsvd_page *rp) |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 793 | { |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 794 | xpc_heartbeat_uv = |
| 795 | &xpc_partitions[sn_partition_id].sn.uv.cached_heartbeat; |
| 796 | rp->sn.uv.heartbeat_gpa = uv_gpa(xpc_heartbeat_uv); |
| 797 | rp->sn.uv.activate_gru_mq_desc_gpa = |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 798 | uv_gpa(xpc_activate_mq_uv->gru_mq_desc); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 799 | return 0; |
| 800 | } |
| 801 | |
| 802 | static void |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 803 | xpc_allow_hb_uv(short partid) |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 804 | { |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 805 | } |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 806 | |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 807 | static void |
| 808 | xpc_disallow_hb_uv(short partid) |
| 809 | { |
| 810 | } |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 811 | |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 812 | static void |
| 813 | xpc_disallow_all_hbs_uv(void) |
| 814 | { |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 815 | } |
| 816 | |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 817 | static void |
| 818 | xpc_increment_heartbeat_uv(void) |
| 819 | { |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 820 | xpc_heartbeat_uv->value++; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 821 | } |
| 822 | |
| 823 | static void |
| 824 | xpc_offline_heartbeat_uv(void) |
| 825 | { |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 826 | xpc_increment_heartbeat_uv(); |
| 827 | xpc_heartbeat_uv->offline = 1; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 828 | } |
| 829 | |
| 830 | static void |
| 831 | xpc_online_heartbeat_uv(void) |
| 832 | { |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 833 | xpc_increment_heartbeat_uv(); |
| 834 | xpc_heartbeat_uv->offline = 0; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 835 | } |
| 836 | |
| 837 | static void |
| 838 | xpc_heartbeat_init_uv(void) |
| 839 | { |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 840 | xpc_heartbeat_uv->value = 1; |
| 841 | xpc_heartbeat_uv->offline = 0; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 842 | } |
| 843 | |
| 844 | static void |
| 845 | xpc_heartbeat_exit_uv(void) |
| 846 | { |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 847 | xpc_offline_heartbeat_uv(); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 848 | } |
| 849 | |
| 850 | static enum xp_retval |
| 851 | xpc_get_remote_heartbeat_uv(struct xpc_partition *part) |
| 852 | { |
| 853 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 854 | enum xp_retval ret; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 855 | |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 856 | ret = xp_remote_memcpy(uv_gpa(&part_uv->cached_heartbeat), |
| 857 | part_uv->heartbeat_gpa, |
| 858 | sizeof(struct xpc_heartbeat_uv)); |
| 859 | if (ret != xpSuccess) |
| 860 | return ret; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 861 | |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 862 | if (part_uv->cached_heartbeat.value == part->last_heartbeat && |
| 863 | !part_uv->cached_heartbeat.offline) { |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 864 | |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 865 | ret = xpNoHeartbeat; |
| 866 | } else { |
| 867 | part->last_heartbeat = part_uv->cached_heartbeat.value; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 868 | } |
| 869 | return ret; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 870 | } |
| 871 | |
| 872 | static void |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 873 | xpc_request_partition_activation_uv(struct xpc_rsvd_page *remote_rp, |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 874 | unsigned long remote_rp_gpa, int nasid) |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 875 | { |
| 876 | short partid = remote_rp->SAL_partid; |
| 877 | struct xpc_partition *part = &xpc_partitions[partid]; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 878 | struct xpc_activate_mq_msg_activate_req_uv msg; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 879 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 880 | part->remote_rp_pa = remote_rp_gpa; /* !!! _pa here is really _gpa */ |
| 881 | part->remote_rp_ts_jiffies = remote_rp->ts_jiffies; |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 882 | part->sn.uv.heartbeat_gpa = remote_rp->sn.uv.heartbeat_gpa; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 883 | part->sn.uv.activate_gru_mq_desc_gpa = |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 884 | remote_rp->sn.uv.activate_gru_mq_desc_gpa; |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 885 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 886 | /* |
| 887 | * ??? Is it a good idea to make this conditional on what is |
| 888 | * ??? potentially stale state information? |
| 889 | */ |
| 890 | if (part->sn.uv.remote_act_state == XPC_P_AS_INACTIVE) { |
| 891 | msg.rp_gpa = uv_gpa(xpc_rsvd_page); |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 892 | msg.heartbeat_gpa = xpc_rsvd_page->sn.uv.heartbeat_gpa; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 893 | msg.activate_gru_mq_desc_gpa = |
Robin Holt | a374c57 | 2009-04-13 14:40:18 -0700 | [diff] [blame] | 894 | xpc_rsvd_page->sn.uv.activate_gru_mq_desc_gpa; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 895 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
| 896 | XPC_ACTIVATE_MQ_MSG_ACTIVATE_REQ_UV); |
| 897 | } |
| 898 | |
| 899 | if (part->act_state == XPC_P_AS_INACTIVE) |
| 900 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 901 | } |
| 902 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 903 | static void |
| 904 | xpc_request_partition_reactivation_uv(struct xpc_partition *part) |
| 905 | { |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 906 | xpc_send_local_activate_IRQ_uv(part, XPC_P_ASR_ACTIVATE_UV); |
| 907 | } |
| 908 | |
| 909 | static void |
| 910 | xpc_request_partition_deactivation_uv(struct xpc_partition *part) |
| 911 | { |
| 912 | struct xpc_activate_mq_msg_deactivate_req_uv msg; |
| 913 | |
| 914 | /* |
| 915 | * ??? Is it a good idea to make this conditional on what is |
| 916 | * ??? potentially stale state information? |
| 917 | */ |
| 918 | if (part->sn.uv.remote_act_state != XPC_P_AS_DEACTIVATING && |
| 919 | part->sn.uv.remote_act_state != XPC_P_AS_INACTIVE) { |
| 920 | |
| 921 | msg.reason = part->reason; |
| 922 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
| 923 | XPC_ACTIVATE_MQ_MSG_DEACTIVATE_REQ_UV); |
| 924 | } |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 925 | } |
| 926 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 927 | static void |
| 928 | xpc_cancel_partition_deactivation_request_uv(struct xpc_partition *part) |
| 929 | { |
| 930 | /* nothing needs to be done */ |
| 931 | return; |
| 932 | } |
| 933 | |
| 934 | static void |
| 935 | xpc_init_fifo_uv(struct xpc_fifo_head_uv *head) |
| 936 | { |
| 937 | head->first = NULL; |
| 938 | head->last = NULL; |
| 939 | spin_lock_init(&head->lock); |
| 940 | head->n_entries = 0; |
| 941 | } |
| 942 | |
| 943 | static void * |
| 944 | xpc_get_fifo_entry_uv(struct xpc_fifo_head_uv *head) |
| 945 | { |
| 946 | unsigned long irq_flags; |
| 947 | struct xpc_fifo_entry_uv *first; |
| 948 | |
| 949 | spin_lock_irqsave(&head->lock, irq_flags); |
| 950 | first = head->first; |
| 951 | if (head->first != NULL) { |
| 952 | head->first = first->next; |
| 953 | if (head->first == NULL) |
| 954 | head->last = NULL; |
Robin Holt | 15b87d6 | 2009-12-15 16:47:57 -0800 | [diff] [blame] | 955 | |
| 956 | head->n_entries--; |
| 957 | BUG_ON(head->n_entries < 0); |
| 958 | |
| 959 | first->next = NULL; |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 960 | } |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 961 | spin_unlock_irqrestore(&head->lock, irq_flags); |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 962 | return first; |
| 963 | } |
| 964 | |
| 965 | static void |
| 966 | xpc_put_fifo_entry_uv(struct xpc_fifo_head_uv *head, |
| 967 | struct xpc_fifo_entry_uv *last) |
| 968 | { |
| 969 | unsigned long irq_flags; |
| 970 | |
| 971 | last->next = NULL; |
| 972 | spin_lock_irqsave(&head->lock, irq_flags); |
| 973 | if (head->last != NULL) |
| 974 | head->last->next = last; |
| 975 | else |
| 976 | head->first = last; |
| 977 | head->last = last; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 978 | head->n_entries++; |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 979 | spin_unlock_irqrestore(&head->lock, irq_flags); |
| 980 | } |
| 981 | |
| 982 | static int |
| 983 | xpc_n_of_fifo_entries_uv(struct xpc_fifo_head_uv *head) |
| 984 | { |
| 985 | return head->n_entries; |
| 986 | } |
| 987 | |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 988 | /* |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 989 | * Setup the channel structures that are uv specific. |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 990 | */ |
| 991 | static enum xp_retval |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 992 | xpc_setup_ch_structures_uv(struct xpc_partition *part) |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 993 | { |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 994 | struct xpc_channel_uv *ch_uv; |
| 995 | int ch_number; |
| 996 | |
| 997 | for (ch_number = 0; ch_number < part->nchannels; ch_number++) { |
| 998 | ch_uv = &part->channels[ch_number].sn.uv; |
| 999 | |
| 1000 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); |
| 1001 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); |
| 1002 | } |
| 1003 | |
| 1004 | return xpSuccess; |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1005 | } |
| 1006 | |
| 1007 | /* |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1008 | * Teardown the channel structures that are uv specific. |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1009 | */ |
| 1010 | static void |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 1011 | xpc_teardown_ch_structures_uv(struct xpc_partition *part) |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1012 | { |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1013 | /* nothing needs to be done */ |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1014 | return; |
| 1015 | } |
| 1016 | |
| 1017 | static enum xp_retval |
| 1018 | xpc_make_first_contact_uv(struct xpc_partition *part) |
| 1019 | { |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1020 | struct xpc_activate_mq_msg_uv msg; |
| 1021 | |
| 1022 | /* |
| 1023 | * We send a sync msg to get the remote partition's remote_act_state |
| 1024 | * updated to our current act_state which at this point should |
| 1025 | * be XPC_P_AS_ACTIVATING. |
| 1026 | */ |
| 1027 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
| 1028 | XPC_ACTIVATE_MQ_MSG_SYNC_ACT_STATE_UV); |
| 1029 | |
Robin Holt | dbd2918 | 2009-12-15 16:47:58 -0800 | [diff] [blame] | 1030 | while (!((part->sn.uv.remote_act_state == XPC_P_AS_ACTIVATING) || |
| 1031 | (part->sn.uv.remote_act_state == XPC_P_AS_ACTIVE))) { |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1032 | |
| 1033 | dev_dbg(xpc_part, "waiting to make first contact with " |
| 1034 | "partition %d\n", XPC_PARTID(part)); |
| 1035 | |
| 1036 | /* wait a 1/4 of a second or so */ |
| 1037 | (void)msleep_interruptible(250); |
| 1038 | |
| 1039 | if (part->act_state == XPC_P_AS_DEACTIVATING) |
| 1040 | return part->reason; |
| 1041 | } |
| 1042 | |
| 1043 | return xpSuccess; |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1044 | } |
| 1045 | |
| 1046 | static u64 |
Dean Nelson | 7fb5e59 | 2008-07-29 22:34:10 -0700 | [diff] [blame] | 1047 | xpc_get_chctl_all_flags_uv(struct xpc_partition *part) |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1048 | { |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1049 | unsigned long irq_flags; |
| 1050 | union xpc_channel_ctl_flags chctl; |
| 1051 | |
| 1052 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
| 1053 | chctl = part->chctl; |
| 1054 | if (chctl.all_flags != 0) |
| 1055 | part->chctl.all_flags = 0; |
| 1056 | |
| 1057 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); |
| 1058 | return chctl.all_flags; |
| 1059 | } |
| 1060 | |
| 1061 | static enum xp_retval |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1062 | xpc_allocate_send_msg_slot_uv(struct xpc_channel *ch) |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1063 | { |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1064 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
| 1065 | struct xpc_send_msg_slot_uv *msg_slot; |
| 1066 | unsigned long irq_flags; |
| 1067 | int nentries; |
| 1068 | int entry; |
| 1069 | size_t nbytes; |
| 1070 | |
| 1071 | for (nentries = ch->local_nentries; nentries > 0; nentries--) { |
| 1072 | nbytes = nentries * sizeof(struct xpc_send_msg_slot_uv); |
| 1073 | ch_uv->send_msg_slots = kzalloc(nbytes, GFP_KERNEL); |
| 1074 | if (ch_uv->send_msg_slots == NULL) |
| 1075 | continue; |
| 1076 | |
| 1077 | for (entry = 0; entry < nentries; entry++) { |
| 1078 | msg_slot = &ch_uv->send_msg_slots[entry]; |
| 1079 | |
| 1080 | msg_slot->msg_slot_number = entry; |
| 1081 | xpc_put_fifo_entry_uv(&ch_uv->msg_slot_free_list, |
| 1082 | &msg_slot->next); |
| 1083 | } |
| 1084 | |
| 1085 | spin_lock_irqsave(&ch->lock, irq_flags); |
| 1086 | if (nentries < ch->local_nentries) |
| 1087 | ch->local_nentries = nentries; |
| 1088 | spin_unlock_irqrestore(&ch->lock, irq_flags); |
| 1089 | return xpSuccess; |
| 1090 | } |
| 1091 | |
| 1092 | return xpNoMemory; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1093 | } |
| 1094 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1095 | static enum xp_retval |
| 1096 | xpc_allocate_recv_msg_slot_uv(struct xpc_channel *ch) |
| 1097 | { |
| 1098 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
| 1099 | struct xpc_notify_mq_msg_uv *msg_slot; |
| 1100 | unsigned long irq_flags; |
| 1101 | int nentries; |
| 1102 | int entry; |
| 1103 | size_t nbytes; |
| 1104 | |
| 1105 | for (nentries = ch->remote_nentries; nentries > 0; nentries--) { |
| 1106 | nbytes = nentries * ch->entry_size; |
| 1107 | ch_uv->recv_msg_slots = kzalloc(nbytes, GFP_KERNEL); |
| 1108 | if (ch_uv->recv_msg_slots == NULL) |
| 1109 | continue; |
| 1110 | |
| 1111 | for (entry = 0; entry < nentries; entry++) { |
Dean Nelson | 361916a | 2009-02-04 15:12:24 -0800 | [diff] [blame] | 1112 | msg_slot = ch_uv->recv_msg_slots + |
| 1113 | entry * ch->entry_size; |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1114 | |
| 1115 | msg_slot->hdr.msg_slot_number = entry; |
| 1116 | } |
| 1117 | |
| 1118 | spin_lock_irqsave(&ch->lock, irq_flags); |
| 1119 | if (nentries < ch->remote_nentries) |
| 1120 | ch->remote_nentries = nentries; |
| 1121 | spin_unlock_irqrestore(&ch->lock, irq_flags); |
| 1122 | return xpSuccess; |
| 1123 | } |
| 1124 | |
| 1125 | return xpNoMemory; |
| 1126 | } |
| 1127 | |
| 1128 | /* |
| 1129 | * Allocate msg_slots associated with the channel. |
| 1130 | */ |
| 1131 | static enum xp_retval |
| 1132 | xpc_setup_msg_structures_uv(struct xpc_channel *ch) |
| 1133 | { |
| 1134 | static enum xp_retval ret; |
| 1135 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
| 1136 | |
| 1137 | DBUG_ON(ch->flags & XPC_C_SETUP); |
| 1138 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1139 | ch_uv->cached_notify_gru_mq_desc = kmalloc(sizeof(struct |
| 1140 | gru_message_queue_desc), |
| 1141 | GFP_KERNEL); |
| 1142 | if (ch_uv->cached_notify_gru_mq_desc == NULL) |
| 1143 | return xpNoMemory; |
| 1144 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1145 | ret = xpc_allocate_send_msg_slot_uv(ch); |
| 1146 | if (ret == xpSuccess) { |
| 1147 | |
| 1148 | ret = xpc_allocate_recv_msg_slot_uv(ch); |
| 1149 | if (ret != xpSuccess) { |
| 1150 | kfree(ch_uv->send_msg_slots); |
| 1151 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); |
| 1152 | } |
| 1153 | } |
| 1154 | return ret; |
| 1155 | } |
| 1156 | |
| 1157 | /* |
| 1158 | * Free up msg_slots and clear other stuff that were setup for the specified |
| 1159 | * channel. |
| 1160 | */ |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1161 | static void |
| 1162 | xpc_teardown_msg_structures_uv(struct xpc_channel *ch) |
| 1163 | { |
| 1164 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
| 1165 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1166 | DBUG_ON(!spin_is_locked(&ch->lock)); |
| 1167 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1168 | kfree(ch_uv->cached_notify_gru_mq_desc); |
| 1169 | ch_uv->cached_notify_gru_mq_desc = NULL; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1170 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1171 | if (ch->flags & XPC_C_SETUP) { |
| 1172 | xpc_init_fifo_uv(&ch_uv->msg_slot_free_list); |
| 1173 | kfree(ch_uv->send_msg_slots); |
| 1174 | xpc_init_fifo_uv(&ch_uv->recv_msg_list); |
| 1175 | kfree(ch_uv->recv_msg_slots); |
| 1176 | } |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1177 | } |
| 1178 | |
| 1179 | static void |
| 1180 | xpc_send_chctl_closerequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1181 | { |
| 1182 | struct xpc_activate_mq_msg_chctl_closerequest_uv msg; |
| 1183 | |
| 1184 | msg.ch_number = ch->number; |
| 1185 | msg.reason = ch->reason; |
| 1186 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
| 1187 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREQUEST_UV); |
| 1188 | } |
| 1189 | |
| 1190 | static void |
| 1191 | xpc_send_chctl_closereply_uv(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1192 | { |
| 1193 | struct xpc_activate_mq_msg_chctl_closereply_uv msg; |
| 1194 | |
| 1195 | msg.ch_number = ch->number; |
| 1196 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
| 1197 | XPC_ACTIVATE_MQ_MSG_CHCTL_CLOSEREPLY_UV); |
| 1198 | } |
| 1199 | |
| 1200 | static void |
| 1201 | xpc_send_chctl_openrequest_uv(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1202 | { |
| 1203 | struct xpc_activate_mq_msg_chctl_openrequest_uv msg; |
| 1204 | |
| 1205 | msg.ch_number = ch->number; |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1206 | msg.entry_size = ch->entry_size; |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1207 | msg.local_nentries = ch->local_nentries; |
| 1208 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
| 1209 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREQUEST_UV); |
| 1210 | } |
| 1211 | |
| 1212 | static void |
| 1213 | xpc_send_chctl_openreply_uv(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1214 | { |
| 1215 | struct xpc_activate_mq_msg_chctl_openreply_uv msg; |
| 1216 | |
| 1217 | msg.ch_number = ch->number; |
| 1218 | msg.local_nentries = ch->local_nentries; |
| 1219 | msg.remote_nentries = ch->remote_nentries; |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1220 | msg.notify_gru_mq_desc_gpa = uv_gpa(xpc_notify_mq_uv->gru_mq_desc); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1221 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
| 1222 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENREPLY_UV); |
| 1223 | } |
| 1224 | |
| 1225 | static void |
Robin Holt | efdd06e | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 1226 | xpc_send_chctl_opencomplete_uv(struct xpc_channel *ch, unsigned long *irq_flags) |
| 1227 | { |
| 1228 | struct xpc_activate_mq_msg_chctl_opencomplete_uv msg; |
| 1229 | |
| 1230 | msg.ch_number = ch->number; |
| 1231 | xpc_send_activate_IRQ_ch_uv(ch, irq_flags, &msg, sizeof(msg), |
| 1232 | XPC_ACTIVATE_MQ_MSG_CHCTL_OPENCOMPLETE_UV); |
| 1233 | } |
| 1234 | |
| 1235 | static void |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1236 | xpc_send_chctl_local_msgrequest_uv(struct xpc_partition *part, int ch_number) |
| 1237 | { |
| 1238 | unsigned long irq_flags; |
| 1239 | |
| 1240 | spin_lock_irqsave(&part->chctl_lock, irq_flags); |
| 1241 | part->chctl.flags[ch_number] |= XPC_CHCTL_MSGREQUEST; |
| 1242 | spin_unlock_irqrestore(&part->chctl_lock, irq_flags); |
| 1243 | |
| 1244 | xpc_wakeup_channel_mgr(part); |
| 1245 | } |
| 1246 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1247 | static enum xp_retval |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1248 | xpc_save_remote_msgqueue_pa_uv(struct xpc_channel *ch, |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1249 | unsigned long gru_mq_desc_gpa) |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1250 | { |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1251 | struct xpc_channel_uv *ch_uv = &ch->sn.uv; |
| 1252 | |
| 1253 | DBUG_ON(ch_uv->cached_notify_gru_mq_desc == NULL); |
| 1254 | return xpc_cache_remote_gru_mq_desc_uv(ch_uv->cached_notify_gru_mq_desc, |
| 1255 | gru_mq_desc_gpa); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1256 | } |
| 1257 | |
| 1258 | static void |
| 1259 | xpc_indicate_partition_engaged_uv(struct xpc_partition *part) |
| 1260 | { |
| 1261 | struct xpc_activate_mq_msg_uv msg; |
| 1262 | |
| 1263 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
| 1264 | XPC_ACTIVATE_MQ_MSG_MARK_ENGAGED_UV); |
| 1265 | } |
| 1266 | |
| 1267 | static void |
| 1268 | xpc_indicate_partition_disengaged_uv(struct xpc_partition *part) |
| 1269 | { |
| 1270 | struct xpc_activate_mq_msg_uv msg; |
| 1271 | |
| 1272 | xpc_send_activate_IRQ_part_uv(part, &msg, sizeof(msg), |
| 1273 | XPC_ACTIVATE_MQ_MSG_MARK_DISENGAGED_UV); |
| 1274 | } |
| 1275 | |
| 1276 | static void |
| 1277 | xpc_assume_partition_disengaged_uv(short partid) |
| 1278 | { |
| 1279 | struct xpc_partition_uv *part_uv = &xpc_partitions[partid].sn.uv; |
| 1280 | unsigned long irq_flags; |
| 1281 | |
| 1282 | spin_lock_irqsave(&part_uv->flags_lock, irq_flags); |
| 1283 | part_uv->flags &= ~XPC_P_ENGAGED_UV; |
| 1284 | spin_unlock_irqrestore(&part_uv->flags_lock, irq_flags); |
| 1285 | } |
| 1286 | |
| 1287 | static int |
| 1288 | xpc_partition_engaged_uv(short partid) |
| 1289 | { |
| 1290 | return (xpc_partitions[partid].sn.uv.flags & XPC_P_ENGAGED_UV) != 0; |
| 1291 | } |
| 1292 | |
| 1293 | static int |
| 1294 | xpc_any_partition_engaged_uv(void) |
| 1295 | { |
| 1296 | struct xpc_partition_uv *part_uv; |
| 1297 | short partid; |
| 1298 | |
| 1299 | for (partid = 0; partid < XP_MAX_NPARTITIONS_UV; partid++) { |
| 1300 | part_uv = &xpc_partitions[partid].sn.uv; |
| 1301 | if ((part_uv->flags & XPC_P_ENGAGED_UV) != 0) |
| 1302 | return 1; |
| 1303 | } |
| 1304 | return 0; |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1305 | } |
| 1306 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1307 | static enum xp_retval |
| 1308 | xpc_allocate_msg_slot_uv(struct xpc_channel *ch, u32 flags, |
| 1309 | struct xpc_send_msg_slot_uv **address_of_msg_slot) |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1310 | { |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1311 | enum xp_retval ret; |
| 1312 | struct xpc_send_msg_slot_uv *msg_slot; |
| 1313 | struct xpc_fifo_entry_uv *entry; |
| 1314 | |
| 1315 | while (1) { |
| 1316 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list); |
| 1317 | if (entry != NULL) |
| 1318 | break; |
| 1319 | |
| 1320 | if (flags & XPC_NOWAIT) |
| 1321 | return xpNoWait; |
| 1322 | |
| 1323 | ret = xpc_allocate_msg_wait(ch); |
| 1324 | if (ret != xpInterrupted && ret != xpTimeout) |
| 1325 | return ret; |
| 1326 | } |
| 1327 | |
| 1328 | msg_slot = container_of(entry, struct xpc_send_msg_slot_uv, next); |
| 1329 | *address_of_msg_slot = msg_slot; |
| 1330 | return xpSuccess; |
| 1331 | } |
| 1332 | |
| 1333 | static void |
| 1334 | xpc_free_msg_slot_uv(struct xpc_channel *ch, |
| 1335 | struct xpc_send_msg_slot_uv *msg_slot) |
| 1336 | { |
| 1337 | xpc_put_fifo_entry_uv(&ch->sn.uv.msg_slot_free_list, &msg_slot->next); |
| 1338 | |
| 1339 | /* wakeup anyone waiting for a free msg slot */ |
| 1340 | if (atomic_read(&ch->n_on_msg_allocate_wq) > 0) |
| 1341 | wake_up(&ch->msg_allocate_wq); |
| 1342 | } |
| 1343 | |
| 1344 | static void |
| 1345 | xpc_notify_sender_uv(struct xpc_channel *ch, |
| 1346 | struct xpc_send_msg_slot_uv *msg_slot, |
| 1347 | enum xp_retval reason) |
| 1348 | { |
| 1349 | xpc_notify_func func = msg_slot->func; |
| 1350 | |
| 1351 | if (func != NULL && cmpxchg(&msg_slot->func, func, NULL) == func) { |
| 1352 | |
| 1353 | atomic_dec(&ch->n_to_notify); |
| 1354 | |
| 1355 | dev_dbg(xpc_chan, "msg_slot->func() called, msg_slot=0x%p " |
| 1356 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, |
| 1357 | msg_slot->msg_slot_number, ch->partid, ch->number); |
| 1358 | |
| 1359 | func(reason, ch->partid, ch->number, msg_slot->key); |
| 1360 | |
| 1361 | dev_dbg(xpc_chan, "msg_slot->func() returned, msg_slot=0x%p " |
| 1362 | "msg_slot_number=%d partid=%d channel=%d\n", msg_slot, |
| 1363 | msg_slot->msg_slot_number, ch->partid, ch->number); |
| 1364 | } |
| 1365 | } |
| 1366 | |
| 1367 | static void |
| 1368 | xpc_handle_notify_mq_ack_uv(struct xpc_channel *ch, |
| 1369 | struct xpc_notify_mq_msg_uv *msg) |
| 1370 | { |
| 1371 | struct xpc_send_msg_slot_uv *msg_slot; |
| 1372 | int entry = msg->hdr.msg_slot_number % ch->local_nentries; |
| 1373 | |
| 1374 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; |
| 1375 | |
| 1376 | BUG_ON(msg_slot->msg_slot_number != msg->hdr.msg_slot_number); |
| 1377 | msg_slot->msg_slot_number += ch->local_nentries; |
| 1378 | |
| 1379 | if (msg_slot->func != NULL) |
| 1380 | xpc_notify_sender_uv(ch, msg_slot, xpMsgDelivered); |
| 1381 | |
| 1382 | xpc_free_msg_slot_uv(ch, msg_slot); |
| 1383 | } |
| 1384 | |
| 1385 | static void |
| 1386 | xpc_handle_notify_mq_msg_uv(struct xpc_partition *part, |
| 1387 | struct xpc_notify_mq_msg_uv *msg) |
| 1388 | { |
| 1389 | struct xpc_partition_uv *part_uv = &part->sn.uv; |
| 1390 | struct xpc_channel *ch; |
| 1391 | struct xpc_channel_uv *ch_uv; |
| 1392 | struct xpc_notify_mq_msg_uv *msg_slot; |
| 1393 | unsigned long irq_flags; |
| 1394 | int ch_number = msg->hdr.ch_number; |
| 1395 | |
| 1396 | if (unlikely(ch_number >= part->nchannels)) { |
| 1397 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received invalid " |
| 1398 | "channel number=0x%x in message from partid=%d\n", |
| 1399 | ch_number, XPC_PARTID(part)); |
| 1400 | |
| 1401 | /* get hb checker to deactivate from the remote partition */ |
| 1402 | spin_lock_irqsave(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 1403 | if (part_uv->act_state_req == 0) |
| 1404 | xpc_activate_IRQ_rcvd++; |
| 1405 | part_uv->act_state_req = XPC_P_ASR_DEACTIVATE_UV; |
| 1406 | part_uv->reason = xpBadChannelNumber; |
| 1407 | spin_unlock_irqrestore(&xpc_activate_IRQ_rcvd_lock, irq_flags); |
| 1408 | |
| 1409 | wake_up_interruptible(&xpc_activate_IRQ_wq); |
| 1410 | return; |
| 1411 | } |
| 1412 | |
| 1413 | ch = &part->channels[ch_number]; |
| 1414 | xpc_msgqueue_ref(ch); |
| 1415 | |
| 1416 | if (!(ch->flags & XPC_C_CONNECTED)) { |
| 1417 | xpc_msgqueue_deref(ch); |
| 1418 | return; |
| 1419 | } |
| 1420 | |
| 1421 | /* see if we're really dealing with an ACK for a previously sent msg */ |
| 1422 | if (msg->hdr.size == 0) { |
| 1423 | xpc_handle_notify_mq_ack_uv(ch, msg); |
| 1424 | xpc_msgqueue_deref(ch); |
| 1425 | return; |
| 1426 | } |
| 1427 | |
| 1428 | /* we're dealing with a normal message sent via the notify_mq */ |
| 1429 | ch_uv = &ch->sn.uv; |
| 1430 | |
Dean Nelson | 361916a | 2009-02-04 15:12:24 -0800 | [diff] [blame] | 1431 | msg_slot = ch_uv->recv_msg_slots + |
| 1432 | (msg->hdr.msg_slot_number % ch->remote_nentries) * ch->entry_size; |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1433 | |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1434 | BUG_ON(msg_slot->hdr.size != 0); |
| 1435 | |
| 1436 | memcpy(msg_slot, msg, msg->hdr.size); |
| 1437 | |
| 1438 | xpc_put_fifo_entry_uv(&ch_uv->recv_msg_list, &msg_slot->hdr.u.next); |
| 1439 | |
| 1440 | if (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE) { |
| 1441 | /* |
| 1442 | * If there is an existing idle kthread get it to deliver |
| 1443 | * the payload, otherwise we'll have to get the channel mgr |
| 1444 | * for this partition to create a kthread to do the delivery. |
| 1445 | */ |
| 1446 | if (atomic_read(&ch->kthreads_idle) > 0) |
| 1447 | wake_up_nr(&ch->idle_wq, 1); |
| 1448 | else |
| 1449 | xpc_send_chctl_local_msgrequest_uv(part, ch->number); |
| 1450 | } |
| 1451 | xpc_msgqueue_deref(ch); |
| 1452 | } |
| 1453 | |
| 1454 | static irqreturn_t |
| 1455 | xpc_handle_notify_IRQ_uv(int irq, void *dev_id) |
| 1456 | { |
| 1457 | struct xpc_notify_mq_msg_uv *msg; |
| 1458 | short partid; |
| 1459 | struct xpc_partition *part; |
| 1460 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1461 | while ((msg = gru_get_next_message(xpc_notify_mq_uv->gru_mq_desc)) != |
| 1462 | NULL) { |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1463 | |
| 1464 | partid = msg->hdr.partid; |
| 1465 | if (partid < 0 || partid >= XP_MAX_NPARTITIONS_UV) { |
| 1466 | dev_err(xpc_part, "xpc_handle_notify_IRQ_uv() received " |
| 1467 | "invalid partid=0x%x in message\n", partid); |
| 1468 | } else { |
| 1469 | part = &xpc_partitions[partid]; |
| 1470 | |
| 1471 | if (xpc_part_ref(part)) { |
| 1472 | xpc_handle_notify_mq_msg_uv(part, msg); |
| 1473 | xpc_part_deref(part); |
| 1474 | } |
| 1475 | } |
| 1476 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1477 | gru_free_message(xpc_notify_mq_uv->gru_mq_desc, msg); |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1478 | } |
| 1479 | |
| 1480 | return IRQ_HANDLED; |
| 1481 | } |
| 1482 | |
| 1483 | static int |
| 1484 | xpc_n_of_deliverable_payloads_uv(struct xpc_channel *ch) |
| 1485 | { |
| 1486 | return xpc_n_of_fifo_entries_uv(&ch->sn.uv.recv_msg_list); |
| 1487 | } |
| 1488 | |
| 1489 | static void |
| 1490 | xpc_process_msg_chctl_flags_uv(struct xpc_partition *part, int ch_number) |
| 1491 | { |
| 1492 | struct xpc_channel *ch = &part->channels[ch_number]; |
| 1493 | int ndeliverable_payloads; |
| 1494 | |
| 1495 | xpc_msgqueue_ref(ch); |
| 1496 | |
| 1497 | ndeliverable_payloads = xpc_n_of_deliverable_payloads_uv(ch); |
| 1498 | |
| 1499 | if (ndeliverable_payloads > 0 && |
| 1500 | (ch->flags & XPC_C_CONNECTED) && |
| 1501 | (ch->flags & XPC_C_CONNECTEDCALLOUT_MADE)) { |
| 1502 | |
| 1503 | xpc_activate_kthreads(ch, ndeliverable_payloads); |
| 1504 | } |
| 1505 | |
| 1506 | xpc_msgqueue_deref(ch); |
| 1507 | } |
| 1508 | |
| 1509 | static enum xp_retval |
| 1510 | xpc_send_payload_uv(struct xpc_channel *ch, u32 flags, void *payload, |
| 1511 | u16 payload_size, u8 notify_type, xpc_notify_func func, |
| 1512 | void *key) |
| 1513 | { |
| 1514 | enum xp_retval ret = xpSuccess; |
| 1515 | struct xpc_send_msg_slot_uv *msg_slot = NULL; |
| 1516 | struct xpc_notify_mq_msg_uv *msg; |
| 1517 | u8 msg_buffer[XPC_NOTIFY_MSG_SIZE_UV]; |
| 1518 | size_t msg_size; |
| 1519 | |
| 1520 | DBUG_ON(notify_type != XPC_N_CALL); |
| 1521 | |
| 1522 | msg_size = sizeof(struct xpc_notify_mq_msghdr_uv) + payload_size; |
| 1523 | if (msg_size > ch->entry_size) |
| 1524 | return xpPayloadTooBig; |
| 1525 | |
| 1526 | xpc_msgqueue_ref(ch); |
| 1527 | |
| 1528 | if (ch->flags & XPC_C_DISCONNECTING) { |
| 1529 | ret = ch->reason; |
| 1530 | goto out_1; |
| 1531 | } |
| 1532 | if (!(ch->flags & XPC_C_CONNECTED)) { |
| 1533 | ret = xpNotConnected; |
| 1534 | goto out_1; |
| 1535 | } |
| 1536 | |
| 1537 | ret = xpc_allocate_msg_slot_uv(ch, flags, &msg_slot); |
| 1538 | if (ret != xpSuccess) |
| 1539 | goto out_1; |
| 1540 | |
| 1541 | if (func != NULL) { |
| 1542 | atomic_inc(&ch->n_to_notify); |
| 1543 | |
| 1544 | msg_slot->key = key; |
Robin Holt | 69b3bb6 | 2009-01-29 14:25:06 -0800 | [diff] [blame] | 1545 | smp_wmb(); /* a non-NULL func must hit memory after the key */ |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1546 | msg_slot->func = func; |
| 1547 | |
| 1548 | if (ch->flags & XPC_C_DISCONNECTING) { |
| 1549 | ret = ch->reason; |
| 1550 | goto out_2; |
| 1551 | } |
| 1552 | } |
| 1553 | |
| 1554 | msg = (struct xpc_notify_mq_msg_uv *)&msg_buffer; |
| 1555 | msg->hdr.partid = xp_partition_id; |
| 1556 | msg->hdr.ch_number = ch->number; |
| 1557 | msg->hdr.size = msg_size; |
| 1558 | msg->hdr.msg_slot_number = msg_slot->msg_slot_number; |
| 1559 | memcpy(&msg->payload, payload, payload_size); |
| 1560 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1561 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
| 1562 | msg_size); |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1563 | if (ret == xpSuccess) |
| 1564 | goto out_1; |
| 1565 | |
| 1566 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); |
| 1567 | out_2: |
| 1568 | if (func != NULL) { |
| 1569 | /* |
| 1570 | * Try to NULL the msg_slot's func field. If we fail, then |
| 1571 | * xpc_notify_senders_of_disconnect_uv() beat us to it, in which |
| 1572 | * case we need to pretend we succeeded to send the message |
| 1573 | * since the user will get a callout for the disconnect error |
| 1574 | * by xpc_notify_senders_of_disconnect_uv(), and to also get an |
| 1575 | * error returned here will confuse them. Additionally, since |
| 1576 | * in this case the channel is being disconnected we don't need |
| 1577 | * to put the the msg_slot back on the free list. |
| 1578 | */ |
| 1579 | if (cmpxchg(&msg_slot->func, func, NULL) != func) { |
| 1580 | ret = xpSuccess; |
| 1581 | goto out_1; |
| 1582 | } |
| 1583 | |
| 1584 | msg_slot->key = NULL; |
| 1585 | atomic_dec(&ch->n_to_notify); |
| 1586 | } |
| 1587 | xpc_free_msg_slot_uv(ch, msg_slot); |
| 1588 | out_1: |
| 1589 | xpc_msgqueue_deref(ch); |
| 1590 | return ret; |
| 1591 | } |
| 1592 | |
| 1593 | /* |
| 1594 | * Tell the callers of xpc_send_notify() that the status of their payloads |
| 1595 | * is unknown because the channel is now disconnecting. |
| 1596 | * |
| 1597 | * We don't worry about putting these msg_slots on the free list since the |
| 1598 | * msg_slots themselves are about to be kfree'd. |
| 1599 | */ |
| 1600 | static void |
| 1601 | xpc_notify_senders_of_disconnect_uv(struct xpc_channel *ch) |
| 1602 | { |
| 1603 | struct xpc_send_msg_slot_uv *msg_slot; |
| 1604 | int entry; |
| 1605 | |
| 1606 | DBUG_ON(!(ch->flags & XPC_C_DISCONNECTING)); |
| 1607 | |
| 1608 | for (entry = 0; entry < ch->local_nentries; entry++) { |
| 1609 | |
| 1610 | if (atomic_read(&ch->n_to_notify) == 0) |
| 1611 | break; |
| 1612 | |
| 1613 | msg_slot = &ch->sn.uv.send_msg_slots[entry]; |
| 1614 | if (msg_slot->func != NULL) |
| 1615 | xpc_notify_sender_uv(ch, msg_slot, ch->reason); |
| 1616 | } |
| 1617 | } |
| 1618 | |
| 1619 | /* |
| 1620 | * Get the next deliverable message's payload. |
| 1621 | */ |
| 1622 | static void * |
| 1623 | xpc_get_deliverable_payload_uv(struct xpc_channel *ch) |
| 1624 | { |
| 1625 | struct xpc_fifo_entry_uv *entry; |
| 1626 | struct xpc_notify_mq_msg_uv *msg; |
| 1627 | void *payload = NULL; |
| 1628 | |
| 1629 | if (!(ch->flags & XPC_C_DISCONNECTING)) { |
| 1630 | entry = xpc_get_fifo_entry_uv(&ch->sn.uv.recv_msg_list); |
| 1631 | if (entry != NULL) { |
| 1632 | msg = container_of(entry, struct xpc_notify_mq_msg_uv, |
| 1633 | hdr.u.next); |
| 1634 | payload = &msg->payload; |
| 1635 | } |
| 1636 | } |
| 1637 | return payload; |
| 1638 | } |
| 1639 | |
| 1640 | static void |
| 1641 | xpc_received_payload_uv(struct xpc_channel *ch, void *payload) |
| 1642 | { |
| 1643 | struct xpc_notify_mq_msg_uv *msg; |
| 1644 | enum xp_retval ret; |
| 1645 | |
| 1646 | msg = container_of(payload, struct xpc_notify_mq_msg_uv, payload); |
| 1647 | |
| 1648 | /* return an ACK to the sender of this message */ |
| 1649 | |
| 1650 | msg->hdr.partid = xp_partition_id; |
| 1651 | msg->hdr.size = 0; /* size of zero indicates this is an ACK */ |
| 1652 | |
Jack Steiner | 6f2584f | 2009-04-02 16:59:10 -0700 | [diff] [blame] | 1653 | ret = xpc_send_gru_msg(ch->sn.uv.cached_notify_gru_mq_desc, msg, |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1654 | sizeof(struct xpc_notify_mq_msghdr_uv)); |
| 1655 | if (ret != xpSuccess) |
| 1656 | XPC_DEACTIVATE_PARTITION(&xpc_partitions[ch->partid], ret); |
Dean Nelson | e17d416 | 2008-07-29 22:34:06 -0700 | [diff] [blame] | 1657 | } |
| 1658 | |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 1659 | static struct xpc_arch_operations xpc_arch_ops_uv = { |
| 1660 | .setup_partitions = xpc_setup_partitions_uv, |
| 1661 | .teardown_partitions = xpc_teardown_partitions_uv, |
| 1662 | .process_activate_IRQ_rcvd = xpc_process_activate_IRQ_rcvd_uv, |
| 1663 | .get_partition_rsvd_page_pa = xpc_get_partition_rsvd_page_pa_uv, |
| 1664 | .setup_rsvd_page = xpc_setup_rsvd_page_uv, |
| 1665 | |
| 1666 | .allow_hb = xpc_allow_hb_uv, |
| 1667 | .disallow_hb = xpc_disallow_hb_uv, |
| 1668 | .disallow_all_hbs = xpc_disallow_all_hbs_uv, |
| 1669 | .increment_heartbeat = xpc_increment_heartbeat_uv, |
| 1670 | .offline_heartbeat = xpc_offline_heartbeat_uv, |
| 1671 | .online_heartbeat = xpc_online_heartbeat_uv, |
| 1672 | .heartbeat_init = xpc_heartbeat_init_uv, |
| 1673 | .heartbeat_exit = xpc_heartbeat_exit_uv, |
| 1674 | .get_remote_heartbeat = xpc_get_remote_heartbeat_uv, |
| 1675 | |
| 1676 | .request_partition_activation = |
| 1677 | xpc_request_partition_activation_uv, |
| 1678 | .request_partition_reactivation = |
| 1679 | xpc_request_partition_reactivation_uv, |
| 1680 | .request_partition_deactivation = |
| 1681 | xpc_request_partition_deactivation_uv, |
| 1682 | .cancel_partition_deactivation_request = |
| 1683 | xpc_cancel_partition_deactivation_request_uv, |
| 1684 | |
| 1685 | .setup_ch_structures = xpc_setup_ch_structures_uv, |
| 1686 | .teardown_ch_structures = xpc_teardown_ch_structures_uv, |
| 1687 | |
| 1688 | .make_first_contact = xpc_make_first_contact_uv, |
| 1689 | |
| 1690 | .get_chctl_all_flags = xpc_get_chctl_all_flags_uv, |
| 1691 | .send_chctl_closerequest = xpc_send_chctl_closerequest_uv, |
| 1692 | .send_chctl_closereply = xpc_send_chctl_closereply_uv, |
| 1693 | .send_chctl_openrequest = xpc_send_chctl_openrequest_uv, |
| 1694 | .send_chctl_openreply = xpc_send_chctl_openreply_uv, |
| 1695 | .send_chctl_opencomplete = xpc_send_chctl_opencomplete_uv, |
| 1696 | .process_msg_chctl_flags = xpc_process_msg_chctl_flags_uv, |
| 1697 | |
| 1698 | .save_remote_msgqueue_pa = xpc_save_remote_msgqueue_pa_uv, |
| 1699 | |
| 1700 | .setup_msg_structures = xpc_setup_msg_structures_uv, |
| 1701 | .teardown_msg_structures = xpc_teardown_msg_structures_uv, |
| 1702 | |
| 1703 | .indicate_partition_engaged = xpc_indicate_partition_engaged_uv, |
| 1704 | .indicate_partition_disengaged = xpc_indicate_partition_disengaged_uv, |
| 1705 | .assume_partition_disengaged = xpc_assume_partition_disengaged_uv, |
| 1706 | .partition_engaged = xpc_partition_engaged_uv, |
| 1707 | .any_partition_engaged = xpc_any_partition_engaged_uv, |
| 1708 | |
| 1709 | .n_of_deliverable_payloads = xpc_n_of_deliverable_payloads_uv, |
| 1710 | .send_payload = xpc_send_payload_uv, |
| 1711 | .get_deliverable_payload = xpc_get_deliverable_payload_uv, |
| 1712 | .received_payload = xpc_received_payload_uv, |
| 1713 | .notify_senders_of_disconnect = xpc_notify_senders_of_disconnect_uv, |
| 1714 | }; |
| 1715 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1716 | int |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 1717 | xpc_init_uv(void) |
| 1718 | { |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 1719 | xpc_arch_ops = xpc_arch_ops_uv; |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1720 | |
| 1721 | if (sizeof(struct xpc_notify_mq_msghdr_uv) > XPC_MSG_HDR_MAX_SIZE) { |
| 1722 | dev_err(xpc_part, "xpc_notify_mq_msghdr_uv is larger than %d\n", |
| 1723 | XPC_MSG_HDR_MAX_SIZE); |
| 1724 | return -E2BIG; |
| 1725 | } |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1726 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 1727 | xpc_activate_mq_uv = xpc_create_gru_mq_uv(XPC_ACTIVATE_MQ_SIZE_UV, 0, |
| 1728 | XPC_ACTIVATE_IRQ_NAME, |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1729 | xpc_handle_activate_IRQ_uv); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 1730 | if (IS_ERR(xpc_activate_mq_uv)) |
| 1731 | return PTR_ERR(xpc_activate_mq_uv); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1732 | |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 1733 | xpc_notify_mq_uv = xpc_create_gru_mq_uv(XPC_NOTIFY_MQ_SIZE_UV, 0, |
| 1734 | XPC_NOTIFY_IRQ_NAME, |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1735 | xpc_handle_notify_IRQ_uv); |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 1736 | if (IS_ERR(xpc_notify_mq_uv)) { |
| 1737 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); |
| 1738 | return PTR_ERR(xpc_notify_mq_uv); |
Dean Nelson | bd3e64c | 2008-07-29 22:34:19 -0700 | [diff] [blame] | 1739 | } |
| 1740 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 1741 | return 0; |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 1742 | } |
| 1743 | |
| 1744 | void |
| 1745 | xpc_exit_uv(void) |
| 1746 | { |
Dean Nelson | 2525789 | 2008-11-05 17:28:00 -0600 | [diff] [blame] | 1747 | xpc_destroy_gru_mq_uv(xpc_notify_mq_uv); |
| 1748 | xpc_destroy_gru_mq_uv(xpc_activate_mq_uv); |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 1749 | } |