^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * (C) Copyright 2020 Hewlett Packard Enterprise Development LP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (c) 2004-2008 Silicon Graphics, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Cross Partition Communication (XPC) partition support.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * This is the part of XPC that detects the presence/absence of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * other partitions. It provides a heartbeat and monitors the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * heartbeats of other partitions.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/hardirq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include "xpc.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/uv/uv_hub.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) /* XPC is exiting flag */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) int xpc_exiting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) /* this partition's reserved page pointers */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct xpc_rsvd_page *xpc_rsvd_page;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static unsigned long *xpc_part_nasids;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) unsigned long *xpc_mach_nasids;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int xpc_nasid_mask_nbytes; /* #of bytes in nasid mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) int xpc_nasid_mask_nlongs; /* #of longs in nasid mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) struct xpc_partition *xpc_partitions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * Guarantee that the kmalloc'd memory is cacheline aligned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) void *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) xpc_kmalloc_cacheline_aligned(size_t size, gfp_t flags, void **base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* see if kmalloc will give us cachline aligned memory by default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) *base = kmalloc(size, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (*base == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if ((u64)*base == L1_CACHE_ALIGN((u64)*base))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) return *base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) kfree(*base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) /* nope, we'll have to do it ourselves */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) *base = kmalloc(size + L1_CACHE_BYTES, flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) if (*base == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return (void *)L1_CACHE_ALIGN((u64)*base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * Given a nasid, get the physical address of the partition's reserved page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) * for that nasid. This function returns 0 on any error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static unsigned long
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) xpc_get_rsvd_page_pa(int nasid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) enum xp_retval ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) u64 cookie = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) unsigned long rp_pa = nasid; /* seed with nasid */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) size_t len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) size_t buf_len = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) void *buf = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) void *buf_base = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) enum xp_retval (*get_partition_rsvd_page_pa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) (void *, u64 *, unsigned long *, size_t *) =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) xpc_arch_ops.get_partition_rsvd_page_pa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) while (1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) /* !!! rp_pa will need to be _gpa on UV.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) * ??? So do we save it into the architecture specific parts
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) * ??? of the xpc_partition structure? Do we rename this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) * ??? function or have two versions? Rename rp_pa for UV to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) * ??? rp_gpa?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) ret = get_partition_rsvd_page_pa(buf, &cookie, &rp_pa, &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) dev_dbg(xpc_part, "SAL returned with ret=%d, cookie=0x%016lx, "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) "address=0x%016lx, len=0x%016lx\n", ret,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) (unsigned long)cookie, rp_pa, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (ret != xpNeedMoreInfo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (len > buf_len) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) kfree(buf_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) buf_len = L1_CACHE_ALIGN(len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) buf = xpc_kmalloc_cacheline_aligned(buf_len, GFP_KERNEL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) &buf_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (buf_base == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) dev_err(xpc_part, "unable to kmalloc "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) "len=0x%016lx\n", buf_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) ret = xpNoMemory;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) ret = xp_remote_memcpy(xp_pa(buf), rp_pa, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) if (ret != xpSuccess) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) dev_dbg(xpc_part, "xp_remote_memcpy failed %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) kfree(buf_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (ret != xpSuccess)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) rp_pa = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) dev_dbg(xpc_part, "reserved page at phys address 0x%016lx\n", rp_pa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) return rp_pa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) * Fill the partition reserved page with the information needed by
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) * other partitions to discover we are alive and establish initial
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * communications.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) xpc_setup_rsvd_page(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) struct xpc_rsvd_page *rp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) unsigned long rp_pa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) unsigned long new_ts_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) /* get the local reserved page's address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) preempt_disable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) rp_pa = xpc_get_rsvd_page_pa(xp_cpu_to_nasid(smp_processor_id()));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) preempt_enable();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (rp_pa == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) dev_err(xpc_part, "SAL failed to locate the reserved page\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return -ESRCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) rp = (struct xpc_rsvd_page *)__va(xp_socket_pa(rp_pa));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) if (rp->SAL_version < 3) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) /* SAL_versions < 3 had a SAL_partid defined as a u8 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) rp->SAL_partid &= 0xff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) BUG_ON(rp->SAL_partid != xp_partition_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (rp->SAL_partid < 0 || rp->SAL_partid >= xp_max_npartitions) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) dev_err(xpc_part, "the reserved page's partid of %d is outside "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) "supported range (< 0 || >= %d)\n", rp->SAL_partid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) xp_max_npartitions);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) rp->version = XPC_RP_VERSION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) rp->max_npartitions = xp_max_npartitions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /* establish the actual sizes of the nasid masks */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) if (rp->SAL_version == 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /* SAL_version 1 didn't set the nasids_size field */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) rp->SAL_nasids_size = 128;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) xpc_nasid_mask_nbytes = rp->SAL_nasids_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) xpc_nasid_mask_nlongs = BITS_TO_LONGS(rp->SAL_nasids_size *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) BITS_PER_BYTE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* setup the pointers to the various items in the reserved page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) xpc_part_nasids = XPC_RP_PART_NASIDS(rp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) ret = xpc_arch_ops.setup_rsvd_page(rp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) if (ret != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) * Set timestamp of when reserved page was setup by XPC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * This signifies to the remote partition that our reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * page is initialized.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) new_ts_jiffies = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) if (new_ts_jiffies == 0 || new_ts_jiffies == rp->ts_jiffies)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) new_ts_jiffies++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) rp->ts_jiffies = new_ts_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) xpc_rsvd_page = rp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) xpc_teardown_rsvd_page(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /* a zero timestamp indicates our rsvd page is not initialized */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) xpc_rsvd_page->ts_jiffies = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) * Get a copy of a portion of the remote partition's rsvd page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) * remote_rp points to a buffer that is cacheline aligned for BTE copies and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) * is large enough to contain a copy of their reserved page header and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * part_nasids mask.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) enum xp_retval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) xpc_get_remote_rp(int nasid, unsigned long *discovered_nasids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) struct xpc_rsvd_page *remote_rp, unsigned long *remote_rp_pa)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) int l;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) enum xp_retval ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) /* get the reserved page's physical address */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) *remote_rp_pa = xpc_get_rsvd_page_pa(nasid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) if (*remote_rp_pa == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) return xpNoRsvdPageAddr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) /* pull over the reserved page header and part_nasids mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) ret = xp_remote_memcpy(xp_pa(remote_rp), *remote_rp_pa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) XPC_RP_HEADER_SIZE + xpc_nasid_mask_nbytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if (ret != xpSuccess)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (discovered_nasids != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) unsigned long *remote_part_nasids =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) XPC_RP_PART_NASIDS(remote_rp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) for (l = 0; l < xpc_nasid_mask_nlongs; l++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) discovered_nasids[l] |= remote_part_nasids[l];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) /* zero timestamp indicates the reserved page has not been setup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (remote_rp->ts_jiffies == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) return xpRsvdPageNotSet;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (XPC_VERSION_MAJOR(remote_rp->version) !=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) XPC_VERSION_MAJOR(XPC_RP_VERSION)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) return xpBadVersion;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) /* check that both remote and local partids are valid for each side */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) if (remote_rp->SAL_partid < 0 ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) remote_rp->SAL_partid >= xp_max_npartitions ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) remote_rp->max_npartitions <= xp_partition_id) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) return xpInvalidPartid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if (remote_rp->SAL_partid == xp_partition_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) return xpLocalPartid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return xpSuccess;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) * See if the other side has responded to a partition deactivate request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * from us. Though we requested the remote partition to deactivate with regard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * to us, we really only need to wait for the other side to disengage from us.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) xpc_partition_disengaged(struct xpc_partition *part)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) short partid = XPC_PARTID(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) int disengaged;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) disengaged = !xpc_arch_ops.partition_engaged(partid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) if (part->disengage_timeout) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) if (!disengaged) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (time_is_after_jiffies(part->disengage_timeout)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) /* timelimit hasn't been reached yet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) * Other side hasn't responded to our deactivate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) * request in a timely fashion, so assume it's dead.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) dev_info(xpc_part, "deactivate request to remote "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) "partition %d timed out\n", partid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) xpc_disengage_timedout = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) xpc_arch_ops.assume_partition_disengaged(partid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) disengaged = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) part->disengage_timeout = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) /* cancel the timer function, provided it's not us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (!in_interrupt())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) del_singleshot_timer_sync(&part->disengage_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) DBUG_ON(part->act_state != XPC_P_AS_DEACTIVATING &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) part->act_state != XPC_P_AS_INACTIVE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) if (part->act_state != XPC_P_AS_INACTIVE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) xpc_wakeup_channel_mgr(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) xpc_arch_ops.cancel_partition_deactivation_request(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) return disengaged;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) * Mark specified partition as active.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) enum xp_retval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) xpc_mark_partition_active(struct xpc_partition *part)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) unsigned long irq_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) enum xp_retval ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) dev_dbg(xpc_part, "setting partition %d to ACTIVE\n", XPC_PARTID(part));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) spin_lock_irqsave(&part->act_lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (part->act_state == XPC_P_AS_ACTIVATING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) part->act_state = XPC_P_AS_ACTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) ret = xpSuccess;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) DBUG_ON(part->reason == xpSuccess);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) ret = part->reason;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) spin_unlock_irqrestore(&part->act_lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) * Start the process of deactivating the specified partition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) xpc_deactivate_partition(const int line, struct xpc_partition *part,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) enum xp_retval reason)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) unsigned long irq_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) spin_lock_irqsave(&part->act_lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (part->act_state == XPC_P_AS_INACTIVE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) XPC_SET_REASON(part, reason, line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) spin_unlock_irqrestore(&part->act_lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) if (reason == xpReactivating) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) /* we interrupt ourselves to reactivate partition */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) xpc_arch_ops.request_partition_reactivation(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) if (part->act_state == XPC_P_AS_DEACTIVATING) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) if ((part->reason == xpUnloading && reason != xpUnloading) ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) reason == xpReactivating) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) XPC_SET_REASON(part, reason, line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) spin_unlock_irqrestore(&part->act_lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) part->act_state = XPC_P_AS_DEACTIVATING;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) XPC_SET_REASON(part, reason, line);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) spin_unlock_irqrestore(&part->act_lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) /* ask remote partition to deactivate with regard to us */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) xpc_arch_ops.request_partition_deactivation(part);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) /* set a timelimit on the disengage phase of the deactivation request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) part->disengage_timeout = jiffies + (xpc_disengage_timelimit * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) part->disengage_timer.expires = part->disengage_timeout;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) add_timer(&part->disengage_timer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) dev_dbg(xpc_part, "bringing partition %d down, reason = %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) XPC_PARTID(part), reason);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) xpc_partition_going_down(part, reason);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * Mark specified partition as inactive.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) xpc_mark_partition_inactive(struct xpc_partition *part)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) unsigned long irq_flags;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) dev_dbg(xpc_part, "setting partition %d to INACTIVE\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) XPC_PARTID(part));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) spin_lock_irqsave(&part->act_lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) part->act_state = XPC_P_AS_INACTIVE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) spin_unlock_irqrestore(&part->act_lock, irq_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) part->remote_rp_pa = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) * SAL has provided a partition and machine mask. The partition mask
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) * contains a bit for each even nasid in our partition. The machine
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) * mask contains a bit for each even nasid in the entire machine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) * Using those two bit arrays, we can determine which nasids are
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) * known in the machine. Each should also have a reserved page
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) * initialized if they are available for partitioning.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) xpc_discovery(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) void *remote_rp_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) struct xpc_rsvd_page *remote_rp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) unsigned long remote_rp_pa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) int region;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) int region_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) int max_regions;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) int nasid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) unsigned long *discovered_nasids;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) enum xp_retval ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) xpc_nasid_mask_nbytes,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) GFP_KERNEL, &remote_rp_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if (remote_rp == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) discovered_nasids = kcalloc(xpc_nasid_mask_nlongs, sizeof(long),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) if (discovered_nasids == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) kfree(remote_rp_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) * The term 'region' in this context refers to the minimum number of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) * nodes that can comprise an access protection grouping. The access
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) * protection is in regards to memory, IOI and IPI.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) region_size = xp_region_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) if (is_uv_system())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) max_regions = 256;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) max_regions = 64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) switch (region_size) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) case 128:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) max_regions *= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) case 64:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) max_regions *= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) fallthrough;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) case 32:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) max_regions *= 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) region_size = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) for (region = 0; region < max_regions; region++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) if (xpc_exiting)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) dev_dbg(xpc_part, "searching region %d\n", region);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) for (nasid = (region * region_size * 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) nasid < ((region + 1) * region_size * 2); nasid += 2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (xpc_exiting)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) dev_dbg(xpc_part, "checking nasid %d\n", nasid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) if (test_bit(nasid / 2, xpc_part_nasids)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) dev_dbg(xpc_part, "PROM indicates Nasid %d is "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) "part of the local partition; skipping "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) "region\n", nasid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) if (!(test_bit(nasid / 2, xpc_mach_nasids))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) dev_dbg(xpc_part, "PROM indicates Nasid %d was "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) "not on Numa-Link network at reset\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) nasid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) if (test_bit(nasid / 2, discovered_nasids)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) dev_dbg(xpc_part, "Nasid %d is part of a "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) "partition which was previously "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) "discovered\n", nasid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) /* pull over the rsvd page header & part_nasids mask */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) ret = xpc_get_remote_rp(nasid, discovered_nasids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) remote_rp, &remote_rp_pa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (ret != xpSuccess) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) dev_dbg(xpc_part, "unable to get reserved page "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) "from nasid %d, reason=%d\n", nasid,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (ret == xpLocalPartid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) xpc_arch_ops.request_partition_activation(remote_rp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) remote_rp_pa, nasid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) kfree(discovered_nasids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) kfree(remote_rp_base);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) * Given a partid, get the nasids owned by that partition from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) * remote partition's reserved page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) enum xp_retval
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) xpc_initiate_partid_to_nasids(short partid, void *nasid_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) struct xpc_partition *part;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) unsigned long part_nasid_pa;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) part = &xpc_partitions[partid];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) if (part->remote_rp_pa == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) return xpPartitionDown;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) memset(nasid_mask, 0, xpc_nasid_mask_nbytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) part_nasid_pa = (unsigned long)XPC_RP_PART_NASIDS(part->remote_rp_pa);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return xp_remote_memcpy(xp_pa(nasid_mask), part_nasid_pa,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) xpc_nasid_mask_nbytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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