Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -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 | 45d9ca4 | 2008-04-22 14:46:56 -0500 | [diff] [blame] | 6 | * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 7 | */ |
| 8 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 9 | /* |
| 10 | * Cross Partition Communication (XPC) partition support. |
| 11 | * |
| 12 | * This is the part of XPC that detects the presence/absence of |
| 13 | * other partitions. It provides a heartbeat and monitors the |
| 14 | * heartbeats of other partitions. |
| 15 | * |
| 16 | */ |
| 17 | |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 18 | #include <linux/device.h> |
| 19 | #include <linux/hardirq.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 20 | #include <linux/slab.h> |
Dean Nelson | 45d9ca4 | 2008-04-22 14:46:56 -0500 | [diff] [blame] | 21 | #include "xpc.h" |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 22 | #include <asm/uv/uv_hub.h> |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 23 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 24 | /* XPC is exiting flag */ |
| 25 | int xpc_exiting; |
| 26 | |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 27 | /* this partition's reserved page pointers */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 28 | struct xpc_rsvd_page *xpc_rsvd_page; |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 29 | static unsigned long *xpc_part_nasids; |
| 30 | unsigned long *xpc_mach_nasids; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 31 | |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 32 | static int xpc_nasid_mask_nbytes; /* #of bytes in nasid mask */ |
| 33 | int xpc_nasid_mask_nlongs; /* #of longs in nasid mask */ |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 34 | |
Dean Nelson | bc63d38 | 2008-07-29 22:34:04 -0700 | [diff] [blame] | 35 | struct xpc_partition *xpc_partitions; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 36 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 37 | /* |
Jes Sorensen | 7aa6ba4 | 2006-02-17 05:18:43 -0500 | [diff] [blame] | 38 | * Guarantee that the kmalloc'd memory is cacheline aligned. |
| 39 | */ |
Dean Nelson | 7682a4c | 2006-08-08 15:03:29 -0500 | [diff] [blame] | 40 | void * |
Jes Sorensen | 7aa6ba4 | 2006-02-17 05:18:43 -0500 | [diff] [blame] | 41 | xpc_kmalloc_cacheline_aligned(size_t size, gfp_t flags, void **base) |
| 42 | { |
| 43 | /* see if kmalloc will give us cachline aligned memory by default */ |
| 44 | *base = kmalloc(size, flags); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 45 | if (*base == NULL) |
Jes Sorensen | 7aa6ba4 | 2006-02-17 05:18:43 -0500 | [diff] [blame] | 46 | return NULL; |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 47 | |
| 48 | if ((u64)*base == L1_CACHE_ALIGN((u64)*base)) |
Jes Sorensen | 7aa6ba4 | 2006-02-17 05:18:43 -0500 | [diff] [blame] | 49 | return *base; |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 50 | |
Jes Sorensen | 7aa6ba4 | 2006-02-17 05:18:43 -0500 | [diff] [blame] | 51 | kfree(*base); |
| 52 | |
| 53 | /* nope, we'll have to do it ourselves */ |
| 54 | *base = kmalloc(size + L1_CACHE_BYTES, flags); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 55 | if (*base == NULL) |
Jes Sorensen | 7aa6ba4 | 2006-02-17 05:18:43 -0500 | [diff] [blame] | 56 | return NULL; |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 57 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 58 | return (void *)L1_CACHE_ALIGN((u64)*base); |
Jes Sorensen | 7aa6ba4 | 2006-02-17 05:18:43 -0500 | [diff] [blame] | 59 | } |
| 60 | |
Jes Sorensen | 7aa6ba4 | 2006-02-17 05:18:43 -0500 | [diff] [blame] | 61 | /* |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 62 | * Given a nasid, get the physical address of the partition's reserved page |
| 63 | * for that nasid. This function returns 0 on any error. |
| 64 | */ |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 65 | static unsigned long |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 66 | xpc_get_rsvd_page_pa(int nasid) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 67 | { |
Dean Nelson | 908787d | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 68 | enum xp_retval ret; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 69 | u64 cookie = 0; |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 70 | unsigned long rp_pa = nasid; /* seed with nasid */ |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 71 | size_t len = 0; |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 72 | size_t buf_len = 0; |
| 73 | void *buf = buf; |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 74 | void *buf_base = NULL; |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 75 | enum xp_retval (*get_partition_rsvd_page_pa) |
| 76 | (void *, u64 *, unsigned long *, size_t *) = |
| 77 | xpc_arch_ops.get_partition_rsvd_page_pa; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 78 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 79 | while (1) { |
| 80 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 81 | /* !!! rp_pa will need to be _gpa on UV. |
| 82 | * ??? So do we save it into the architecture specific parts |
| 83 | * ??? of the xpc_partition structure? Do we rename this |
| 84 | * ??? function or have two versions? Rename rp_pa for UV to |
| 85 | * ??? rp_gpa? |
| 86 | */ |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 87 | ret = get_partition_rsvd_page_pa(buf, &cookie, &rp_pa, &len); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 88 | |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 89 | dev_dbg(xpc_part, "SAL returned with ret=%d, cookie=0x%016lx, " |
| 90 | "address=0x%016lx, len=0x%016lx\n", ret, |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 91 | (unsigned long)cookie, rp_pa, len); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 92 | |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 93 | if (ret != xpNeedMoreInfo) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 94 | break; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 95 | |
Dean Nelson | ea57f80 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 96 | /* !!! L1_CACHE_ALIGN() is only a sn2-bte_copy requirement */ |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 97 | if (is_shub()) |
| 98 | len = L1_CACHE_ALIGN(len); |
| 99 | |
| 100 | if (len > buf_len) { |
| 101 | if (buf_base != NULL) |
| 102 | kfree(buf_base); |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 103 | buf_len = L1_CACHE_ALIGN(len); |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 104 | buf = xpc_kmalloc_cacheline_aligned(buf_len, GFP_KERNEL, |
| 105 | &buf_base); |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 106 | if (buf_base == NULL) { |
| 107 | dev_err(xpc_part, "unable to kmalloc " |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 108 | "len=0x%016lx\n", buf_len); |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 109 | ret = xpNoMemory; |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 110 | break; |
| 111 | } |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 112 | } |
| 113 | |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 114 | ret = xp_remote_memcpy(xp_pa(buf), rp_pa, len); |
Dean Nelson | 908787d | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 115 | if (ret != xpSuccess) { |
| 116 | dev_dbg(xpc_part, "xp_remote_memcpy failed %d\n", ret); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 117 | break; |
| 118 | } |
| 119 | } |
| 120 | |
Jesper Juhl | cbf283c | 2006-04-20 10:11:09 -0700 | [diff] [blame] | 121 | kfree(buf_base); |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 122 | |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 123 | if (ret != xpSuccess) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 124 | rp_pa = 0; |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 125 | |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 126 | dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 127 | return rp_pa; |
| 128 | } |
| 129 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 130 | /* |
| 131 | * Fill the partition reserved page with the information needed by |
| 132 | * other partitions to discover we are alive and establish initial |
| 133 | * communications. |
| 134 | */ |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 135 | int |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 136 | xpc_setup_rsvd_page(void) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 137 | { |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 138 | int ret; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 139 | struct xpc_rsvd_page *rp; |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 140 | unsigned long rp_pa; |
Dean Nelson | 81fe788 | 2008-07-29 22:34:15 -0700 | [diff] [blame] | 141 | unsigned long new_ts_jiffies; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 142 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 143 | /* get the local reserved page's address */ |
| 144 | |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 145 | preempt_disable(); |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 146 | rp_pa = xpc_get_rsvd_page_pa(xp_cpu_to_nasid(smp_processor_id())); |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 147 | preempt_enable(); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 148 | if (rp_pa == 0) { |
| 149 | dev_err(xpc_part, "SAL failed to locate the reserved page\n"); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 150 | return -ESRCH; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 151 | } |
Robin Holt | c2c9f11 | 2009-12-15 16:47:56 -0800 | [diff] [blame] | 152 | rp = (struct xpc_rsvd_page *)__va(xp_socket_pa(rp_pa)); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 153 | |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 154 | if (rp->SAL_version < 3) { |
| 155 | /* SAL_versions < 3 had a SAL_partid defined as a u8 */ |
| 156 | rp->SAL_partid &= 0xff; |
| 157 | } |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 158 | BUG_ON(rp->SAL_partid != xp_partition_id); |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 159 | |
| 160 | if (rp->SAL_partid < 0 || rp->SAL_partid >= xp_max_npartitions) { |
| 161 | dev_err(xpc_part, "the reserved page's partid of %d is outside " |
| 162 | "supported range (< 0 || >= %d)\n", rp->SAL_partid, |
| 163 | xp_max_npartitions); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 164 | return -EINVAL; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 165 | } |
| 166 | |
| 167 | rp->version = XPC_RP_VERSION; |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 168 | rp->max_npartitions = xp_max_npartitions; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 169 | |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 170 | /* establish the actual sizes of the nasid masks */ |
| 171 | if (rp->SAL_version == 1) { |
| 172 | /* SAL_version 1 didn't set the nasids_size field */ |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 173 | rp->SAL_nasids_size = 128; |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 174 | } |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 175 | xpc_nasid_mask_nbytes = rp->SAL_nasids_size; |
| 176 | xpc_nasid_mask_nlongs = BITS_TO_LONGS(rp->SAL_nasids_size * |
| 177 | BITS_PER_BYTE); |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 178 | |
| 179 | /* setup the pointers to the various items in the reserved page */ |
| 180 | xpc_part_nasids = XPC_RP_PART_NASIDS(rp); |
| 181 | xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp); |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 182 | |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 183 | ret = xpc_arch_ops.setup_rsvd_page(rp); |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 184 | if (ret != 0) |
| 185 | return ret; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 186 | |
| 187 | /* |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 188 | * Set timestamp of when reserved page was setup by XPC. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 189 | * This signifies to the remote partition that our reserved |
| 190 | * page is initialized. |
| 191 | */ |
Dean Nelson | 81fe788 | 2008-07-29 22:34:15 -0700 | [diff] [blame] | 192 | new_ts_jiffies = jiffies; |
| 193 | if (new_ts_jiffies == 0 || new_ts_jiffies == rp->ts_jiffies) |
| 194 | new_ts_jiffies++; |
| 195 | rp->ts_jiffies = new_ts_jiffies; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 196 | |
Dean Nelson | 5b8669d | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 197 | xpc_rsvd_page = rp; |
| 198 | return 0; |
| 199 | } |
| 200 | |
| 201 | void |
| 202 | xpc_teardown_rsvd_page(void) |
| 203 | { |
| 204 | /* a zero timestamp indicates our rsvd page is not initialized */ |
| 205 | xpc_rsvd_page->ts_jiffies = 0; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 206 | } |
| 207 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 208 | /* |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 209 | * Get a copy of a portion of the remote partition's rsvd page. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 210 | * |
| 211 | * remote_rp points to a buffer that is cacheline aligned for BTE copies and |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 212 | * is large enough to contain a copy of their reserved page header and |
| 213 | * part_nasids mask. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 214 | */ |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 215 | enum xp_retval |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 216 | xpc_get_remote_rp(int nasid, unsigned long *discovered_nasids, |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 217 | struct xpc_rsvd_page *remote_rp, unsigned long *remote_rp_pa) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 218 | { |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 219 | int l; |
Dean Nelson | 908787d | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 220 | enum xp_retval ret; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 221 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 222 | /* get the reserved page's physical address */ |
| 223 | |
Dean Nelson | 2792902 | 2005-10-25 14:11:53 -0500 | [diff] [blame] | 224 | *remote_rp_pa = xpc_get_rsvd_page_pa(nasid); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 225 | if (*remote_rp_pa == 0) |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 226 | return xpNoRsvdPageAddr; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 227 | |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 228 | /* pull over the reserved page header and part_nasids mask */ |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 229 | ret = xp_remote_memcpy(xp_pa(remote_rp), *remote_rp_pa, |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 230 | XPC_RP_HEADER_SIZE + xpc_nasid_mask_nbytes); |
Dean Nelson | 908787d | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 231 | if (ret != xpSuccess) |
| 232 | return ret; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 233 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 234 | if (discovered_nasids != NULL) { |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 235 | unsigned long *remote_part_nasids = |
| 236 | XPC_RP_PART_NASIDS(remote_rp); |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 237 | |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 238 | for (l = 0; l < xpc_nasid_mask_nlongs; l++) |
| 239 | discovered_nasids[l] |= remote_part_nasids[l]; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 240 | } |
| 241 | |
Dean Nelson | 81fe788 | 2008-07-29 22:34:15 -0700 | [diff] [blame] | 242 | /* zero timestamp indicates the reserved page has not been setup */ |
| 243 | if (remote_rp->ts_jiffies == 0) |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 244 | return xpRsvdPageNotSet; |
| 245 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 246 | if (XPC_VERSION_MAJOR(remote_rp->version) != |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 247 | XPC_VERSION_MAJOR(XPC_RP_VERSION)) { |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 248 | return xpBadVersion; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 251 | /* check that both remote and local partids are valid for each side */ |
Dean Nelson | aaa3cd6 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 252 | if (remote_rp->SAL_partid < 0 || |
| 253 | remote_rp->SAL_partid >= xp_max_npartitions || |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 254 | remote_rp->max_npartitions <= xp_partition_id) { |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 255 | return xpInvalidPartid; |
Dean Nelson | aaa3cd6 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 256 | } |
| 257 | |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 258 | if (remote_rp->SAL_partid == xp_partition_id) |
Dean Nelson | aaa3cd6 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 259 | return xpLocalPartid; |
Dean Nelson | 94bd270 | 2008-07-29 22:34:05 -0700 | [diff] [blame] | 260 | |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 261 | return xpSuccess; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 262 | } |
| 263 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 264 | /* |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 265 | * See if the other side has responded to a partition deactivate request |
| 266 | * from us. Though we requested the remote partition to deactivate with regard |
| 267 | * to us, we really only need to wait for the other side to disengage from us. |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 268 | */ |
| 269 | int |
| 270 | xpc_partition_disengaged(struct xpc_partition *part) |
| 271 | { |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 272 | short partid = XPC_PARTID(part); |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 273 | int disengaged; |
| 274 | |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 275 | disengaged = !xpc_arch_ops.partition_engaged(partid); |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 276 | if (part->disengage_timeout) { |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 277 | if (!disengaged) { |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 278 | if (time_is_after_jiffies(part->disengage_timeout)) { |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 279 | /* timelimit hasn't been reached yet */ |
| 280 | return 0; |
| 281 | } |
| 282 | |
| 283 | /* |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 284 | * Other side hasn't responded to our deactivate |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 285 | * request in a timely fashion, so assume it's dead. |
| 286 | */ |
| 287 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 288 | dev_info(xpc_part, "deactivate request to remote " |
| 289 | "partition %d timed out\n", partid); |
| 290 | xpc_disengage_timedout = 1; |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 291 | xpc_arch_ops.assume_partition_disengaged(partid); |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 292 | disengaged = 1; |
| 293 | } |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 294 | part->disengage_timeout = 0; |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 295 | |
| 296 | /* cancel the timer function, provided it's not us */ |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 297 | if (!in_interrupt()) |
| 298 | del_singleshot_timer_sync(&part->disengage_timer); |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 299 | |
Dean Nelson | 83469b5 | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 300 | DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING && |
| 301 | part->act_state != XPC_P_AS_INACTIVE); |
| 302 | if (part->act_state != XPC_P_AS_INACTIVE) |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 303 | xpc_wakeup_channel_mgr(part); |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 304 | |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 305 | xpc_arch_ops.cancel_partition_deactivation_request(part); |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 306 | } |
| 307 | return disengaged; |
| 308 | } |
| 309 | |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 310 | /* |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 311 | * Mark specified partition as active. |
| 312 | */ |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 313 | enum xp_retval |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 314 | xpc_mark_partition_active(struct xpc_partition *part) |
| 315 | { |
| 316 | unsigned long irq_flags; |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 317 | enum xp_retval ret; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 318 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 319 | dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part)); |
| 320 | |
| 321 | spin_lock_irqsave(&part->act_lock, irq_flags); |
Dean Nelson | 83469b5 | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 322 | if (part->act_state == XPC_P_AS_ACTIVATING) { |
| 323 | part->act_state = XPC_P_AS_ACTIVE; |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 324 | ret = xpSuccess; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 325 | } else { |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 326 | DBUG_ON(part->reason == xpSuccess); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 327 | ret = part->reason; |
| 328 | } |
| 329 | spin_unlock_irqrestore(&part->act_lock, irq_flags); |
| 330 | |
| 331 | return ret; |
| 332 | } |
| 333 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 334 | /* |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 335 | * Start the process of deactivating the specified partition. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 336 | */ |
| 337 | void |
| 338 | xpc_deactivate_partition(const int line, struct xpc_partition *part, |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 339 | enum xp_retval reason) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 340 | { |
| 341 | unsigned long irq_flags; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 342 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 343 | spin_lock_irqsave(&part->act_lock, irq_flags); |
| 344 | |
Dean Nelson | 83469b5 | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 345 | if (part->act_state == XPC_P_AS_INACTIVE) { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 346 | XPC_SET_REASON(part, reason, line); |
| 347 | spin_unlock_irqrestore(&part->act_lock, irq_flags); |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 348 | if (reason == xpReactivating) { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 349 | /* we interrupt ourselves to reactivate partition */ |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 350 | xpc_arch_ops.request_partition_reactivation(part); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 351 | } |
| 352 | return; |
| 353 | } |
Dean Nelson | 83469b5 | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 354 | if (part->act_state == XPC_P_AS_DEACTIVATING) { |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 355 | if ((part->reason == xpUnloading && reason != xpUnloading) || |
| 356 | reason == xpReactivating) { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 357 | XPC_SET_REASON(part, reason, line); |
| 358 | } |
| 359 | spin_unlock_irqrestore(&part->act_lock, irq_flags); |
| 360 | return; |
| 361 | } |
| 362 | |
Dean Nelson | 83469b5 | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 363 | part->act_state = XPC_P_AS_DEACTIVATING; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 364 | XPC_SET_REASON(part, reason, line); |
| 365 | |
| 366 | spin_unlock_irqrestore(&part->act_lock, irq_flags); |
| 367 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 368 | /* ask remote partition to deactivate with regard to us */ |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 369 | xpc_arch_ops.request_partition_deactivation(part); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 370 | |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 371 | /* set a timelimit on the disengage phase of the deactivation request */ |
| 372 | part->disengage_timeout = jiffies + (xpc_disengage_timelimit * HZ); |
| 373 | part->disengage_timer.expires = part->disengage_timeout; |
| 374 | add_timer(&part->disengage_timer); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 375 | |
Dean Nelson | e54af72 | 2005-10-25 14:07:43 -0500 | [diff] [blame] | 376 | dev_dbg(xpc_part, "bringing partition %d down, reason = %d\n", |
| 377 | XPC_PARTID(part), reason); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 378 | |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 379 | xpc_partition_going_down(part, reason); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 380 | } |
| 381 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 382 | /* |
Dean Nelson | a607c38 | 2005-09-01 14:01:37 -0500 | [diff] [blame] | 383 | * Mark specified partition as inactive. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 384 | */ |
| 385 | void |
| 386 | xpc_mark_partition_inactive(struct xpc_partition *part) |
| 387 | { |
| 388 | unsigned long irq_flags; |
| 389 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 390 | dev_dbg(xpc_part, "setting partition %d to INACTIVE\n", |
| 391 | XPC_PARTID(part)); |
| 392 | |
| 393 | spin_lock_irqsave(&part->act_lock, irq_flags); |
Dean Nelson | 83469b5 | 2008-07-29 22:34:18 -0700 | [diff] [blame] | 394 | part->act_state = XPC_P_AS_INACTIVE; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 395 | spin_unlock_irqrestore(&part->act_lock, irq_flags); |
| 396 | part->remote_rp_pa = 0; |
| 397 | } |
| 398 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 399 | /* |
| 400 | * SAL has provided a partition and machine mask. The partition mask |
| 401 | * contains a bit for each even nasid in our partition. The machine |
| 402 | * mask contains a bit for each even nasid in the entire machine. |
| 403 | * |
| 404 | * Using those two bit arrays, we can determine which nasids are |
| 405 | * known in the machine. Each should also have a reserved page |
| 406 | * initialized if they are available for partitioning. |
| 407 | */ |
| 408 | void |
| 409 | xpc_discovery(void) |
| 410 | { |
| 411 | void *remote_rp_base; |
| 412 | struct xpc_rsvd_page *remote_rp; |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 413 | unsigned long remote_rp_pa; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 414 | int region; |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 415 | int region_size; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 416 | int max_regions; |
| 417 | int nasid; |
| 418 | struct xpc_rsvd_page *rp; |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 419 | unsigned long *discovered_nasids; |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 420 | enum xp_retval ret; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 421 | |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 422 | remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE + |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 423 | xpc_nasid_mask_nbytes, |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 424 | GFP_KERNEL, &remote_rp_base); |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 425 | if (remote_rp == NULL) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 426 | return; |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 427 | |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 428 | discovered_nasids = kzalloc(sizeof(long) * xpc_nasid_mask_nlongs, |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 429 | GFP_KERNEL); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 430 | if (discovered_nasids == NULL) { |
| 431 | kfree(remote_rp_base); |
| 432 | return; |
| 433 | } |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 434 | |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 435 | rp = (struct xpc_rsvd_page *)xpc_rsvd_page; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 436 | |
| 437 | /* |
| 438 | * The term 'region' in this context refers to the minimum number of |
| 439 | * nodes that can comprise an access protection grouping. The access |
| 440 | * protection is in regards to memory, IOI and IPI. |
| 441 | */ |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 442 | max_regions = 64; |
Dean Nelson | 261f3b4 | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 443 | region_size = xp_region_size; |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 444 | |
| 445 | switch (region_size) { |
| 446 | case 128: |
| 447 | max_regions *= 2; |
| 448 | case 64: |
| 449 | max_regions *= 2; |
| 450 | case 32: |
| 451 | max_regions *= 2; |
| 452 | region_size = 16; |
| 453 | DBUG_ON(!is_shub2()); |
| 454 | } |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 455 | |
| 456 | for (region = 0; region < max_regions; region++) { |
| 457 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 458 | if (xpc_exiting) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 459 | break; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 460 | |
| 461 | dev_dbg(xpc_part, "searching region %d\n", region); |
| 462 | |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 463 | for (nasid = (region * region_size * 2); |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 464 | nasid < ((region + 1) * region_size * 2); nasid += 2) { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 465 | |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 466 | if (xpc_exiting) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 467 | break; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 468 | |
| 469 | dev_dbg(xpc_part, "checking nasid %d\n", nasid); |
| 470 | |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 471 | if (test_bit(nasid / 2, xpc_part_nasids)) { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 472 | dev_dbg(xpc_part, "PROM indicates Nasid %d is " |
| 473 | "part of the local partition; skipping " |
| 474 | "region\n", nasid); |
| 475 | break; |
| 476 | } |
| 477 | |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 478 | if (!(test_bit(nasid / 2, xpc_mach_nasids))) { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 479 | dev_dbg(xpc_part, "PROM indicates Nasid %d was " |
| 480 | "not on Numa-Link network at reset\n", |
| 481 | nasid); |
| 482 | continue; |
| 483 | } |
| 484 | |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 485 | if (test_bit(nasid / 2, discovered_nasids)) { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 486 | dev_dbg(xpc_part, "Nasid %d is part of a " |
| 487 | "partition which was previously " |
| 488 | "discovered\n", nasid); |
| 489 | continue; |
| 490 | } |
| 491 | |
Dean Nelson | 33ba3c7 | 2008-07-29 22:34:07 -0700 | [diff] [blame] | 492 | /* pull over the rsvd page header & part_nasids mask */ |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 493 | |
| 494 | ret = xpc_get_remote_rp(nasid, discovered_nasids, |
Dean Nelson | 4a3ad2d | 2008-04-22 14:48:01 -0500 | [diff] [blame] | 495 | remote_rp, &remote_rp_pa); |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 496 | if (ret != xpSuccess) { |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 497 | dev_dbg(xpc_part, "unable to get reserved page " |
| 498 | "from nasid %d, reason=%d\n", nasid, |
| 499 | ret); |
| 500 | |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 501 | if (ret == xpLocalPartid) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 502 | break; |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 503 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 504 | continue; |
| 505 | } |
| 506 | |
Robin Holt | a7665b0 | 2009-04-13 14:40:19 -0700 | [diff] [blame] | 507 | xpc_arch_ops.request_partition_activation(remote_rp, |
Dean Nelson | a47d5da | 2008-07-29 22:34:09 -0700 | [diff] [blame] | 508 | remote_rp_pa, nasid); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 509 | } |
| 510 | } |
| 511 | |
| 512 | kfree(discovered_nasids); |
| 513 | kfree(remote_rp_base); |
| 514 | } |
| 515 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 516 | /* |
| 517 | * Given a partid, get the nasids owned by that partition from the |
Dean Nelson | 3a7d555 | 2005-04-04 13:14:00 -0700 | [diff] [blame] | 518 | * remote partition's reserved page. |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 519 | */ |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 520 | enum xp_retval |
Dean Nelson | 64d032b | 2008-05-12 14:02:03 -0700 | [diff] [blame] | 521 | xpc_initiate_partid_to_nasids(short partid, void *nasid_mask) |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 522 | { |
| 523 | struct xpc_partition *part; |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 524 | unsigned long part_nasid_pa; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 525 | |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 526 | part = &xpc_partitions[partid]; |
Dean Nelson | 2c2b94f | 2008-04-22 14:50:17 -0500 | [diff] [blame] | 527 | if (part->remote_rp_pa == 0) |
Dean Nelson | 65c17b8 | 2008-05-12 14:02:02 -0700 | [diff] [blame] | 528 | return xpPartitionDown; |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 529 | |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 530 | memset(nasid_mask, 0, xpc_nasid_mask_nbytes); |
Dean Nelson | 4b38fcd | 2005-10-25 14:09:51 -0500 | [diff] [blame] | 531 | |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 532 | part_nasid_pa = (unsigned long)XPC_RP_PART_NASIDS(part->remote_rp_pa); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 533 | |
Dean Nelson | a812dcc | 2008-07-29 22:34:16 -0700 | [diff] [blame] | 534 | return xp_remote_memcpy(xp_pa(nasid_mask), part_nasid_pa, |
Dean Nelson | 04de741 | 2008-07-29 22:34:14 -0700 | [diff] [blame] | 535 | xpc_nasid_mask_nbytes); |
Dean Nelson | 89eb8eb | 2005-03-23 19:50:00 -0700 | [diff] [blame] | 536 | } |