diff options
author | Dean Nelson <dcn@sgi.com> | 2008-07-30 07:34:05 +0200 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-30 18:41:49 +0200 |
commit | 94bd2708d4a95d7da5a1c7c28a063eccd127fb69 (patch) | |
tree | bcc65d3966e240017f8fb355114ec07c906b0b63 /drivers/misc/sgi-xp/xpc_partition.c | |
parent | sgi-xp: create a common xp_remote_memcpy() function (diff) | |
download | linux-94bd2708d4a95d7da5a1c7c28a063eccd127fb69.tar.xz linux-94bd2708d4a95d7da5a1c7c28a063eccd127fb69.zip |
sgi-xp: prepare xpc_rsvd_page to work on either sn2 or uv hardware
Prepare XPC's reserved page header to work for either sn2 or uv.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/misc/sgi-xp/xpc_partition.c')
-rw-r--r-- | drivers/misc/sgi-xp/xpc_partition.c | 149 |
1 files changed, 44 insertions, 105 deletions
diff --git a/drivers/misc/sgi-xp/xpc_partition.c b/drivers/misc/sgi-xp/xpc_partition.c index 6c82f2050974..1db84cb49143 100644 --- a/drivers/misc/sgi-xp/xpc_partition.c +++ b/drivers/misc/sgi-xp/xpc_partition.c @@ -20,7 +20,6 @@ #include <linux/cache.h> #include <linux/mmzone.h> #include <linux/nodemask.h> -#include <asm/uncached.h> #include <asm/sn/intr.h> #include <asm/sn/sn_sal.h> #include <asm/sn/nodepda.h> @@ -44,11 +43,10 @@ u64 xpc_prot_vec[MAX_NUMNODES]; struct xpc_rsvd_page *xpc_rsvd_page; static u64 *xpc_part_nasids; static u64 *xpc_mach_nasids; -struct xpc_vars *xpc_vars; -struct xpc_vars_part *xpc_vars_part; -static int xp_nasid_mask_bytes; /* actual size in bytes of nasid mask */ -static int xp_nasid_mask_words; /* actual size in words of nasid mask */ +/* >>> next two variables should be 'xpc_' if they remain here */ +static int xp_sizeof_nasid_mask; /* actual size in bytes of nasid mask */ +int xp_nasid_mask_words; /* actual size in words of nasid mask */ struct xpc_partition *xpc_partitions; @@ -150,12 +148,10 @@ xpc_get_rsvd_page_pa(int nasid) * communications. */ struct xpc_rsvd_page * -xpc_rsvd_page_init(void) +xpc_setup_rsvd_page(void) { struct xpc_rsvd_page *rp; - AMO_t *amos_page; - u64 rp_pa, nasid_array = 0; - int i, ret; + u64 rp_pa; /* get the local reserved page's address */ @@ -168,110 +164,44 @@ xpc_rsvd_page_init(void) } rp = (struct xpc_rsvd_page *)__va(rp_pa); - if (rp->partid != sn_partition_id) { - dev_err(xpc_part, "the reserved page's partid of %d should be " - "%d\n", rp->partid, sn_partition_id); + if (rp->SAL_version < 3) { + /* SAL_versions < 3 had a SAL_partid defined as a u8 */ + rp->SAL_partid &= 0xff; + } + BUG_ON(rp->SAL_partid != sn_partition_id); + + if (rp->SAL_partid < 0 || rp->SAL_partid >= xp_max_npartitions) { + dev_err(xpc_part, "the reserved page's partid of %d is outside " + "supported range (< 0 || >= %d)\n", rp->SAL_partid, + xp_max_npartitions); return NULL; } rp->version = XPC_RP_VERSION; + rp->max_npartitions = xp_max_npartitions; /* establish the actual sizes of the nasid masks */ if (rp->SAL_version == 1) { /* SAL_version 1 didn't set the nasids_size field */ - rp->nasids_size = 128; + rp->SAL_nasids_size = 128; } - xp_nasid_mask_bytes = rp->nasids_size; - xp_nasid_mask_words = xp_nasid_mask_bytes / 8; + xp_sizeof_nasid_mask = rp->SAL_nasids_size; + xp_nasid_mask_words = DIV_ROUND_UP(xp_sizeof_nasid_mask, + BYTES_PER_WORD); /* setup the pointers to the various items in the reserved page */ xpc_part_nasids = XPC_RP_PART_NASIDS(rp); xpc_mach_nasids = XPC_RP_MACH_NASIDS(rp); - xpc_vars = XPC_RP_VARS(rp); - xpc_vars_part = XPC_RP_VARS_PART(rp); - /* - * Before clearing xpc_vars, see if a page of AMOs had been previously - * allocated. If not we'll need to allocate one and set permissions - * so that cross-partition AMOs are allowed. - * - * The allocated AMO page needs MCA reporting to remain disabled after - * XPC has unloaded. To make this work, we keep a copy of the pointer - * to this page (i.e., amos_page) in the struct xpc_vars structure, - * which is pointed to by the reserved page, and re-use that saved copy - * on subsequent loads of XPC. This AMO page is never freed, and its - * memory protections are never restricted. - */ - amos_page = xpc_vars->amos_page; - if (amos_page == NULL) { - amos_page = (AMO_t *)TO_AMO(uncached_alloc_page(0, 1)); - if (amos_page == NULL) { - dev_err(xpc_part, "can't allocate page of AMOs\n"); - return NULL; - } - - /* - * Open up AMO-R/W to cpu. This is done for Shub 1.1 systems - * when xpc_allow_IPI_ops() is called via xpc_hb_init(). - */ - if (!enable_shub_wars_1_1()) { - ret = sn_change_memprotect(ia64_tpa((u64)amos_page), - PAGE_SIZE, - SN_MEMPROT_ACCESS_CLASS_1, - &nasid_array); - if (ret != 0) { - dev_err(xpc_part, "can't change memory " - "protections\n"); - uncached_free_page(__IA64_UNCACHED_OFFSET | - TO_PHYS((u64)amos_page), 1); - return NULL; - } - } - } else if (!IS_AMO_ADDRESS((u64)amos_page)) { - /* - * EFI's XPBOOT can also set amos_page in the reserved page, - * but it happens to leave it as an uncached physical address - * and we need it to be an uncached virtual, so we'll have to - * convert it. - */ - if (!IS_AMO_PHYS_ADDRESS((u64)amos_page)) { - dev_err(xpc_part, "previously used amos_page address " - "is bad = 0x%p\n", (void *)amos_page); - return NULL; - } - amos_page = (AMO_t *)TO_AMO((u64)amos_page); - } - - /* clear xpc_vars */ - memset(xpc_vars, 0, sizeof(struct xpc_vars)); - - xpc_vars->version = XPC_V_VERSION; - xpc_vars->act_nasid = cpuid_to_nasid(0); - xpc_vars->act_phys_cpuid = cpu_physical_id(0); - xpc_vars->vars_part_pa = __pa(xpc_vars_part); - xpc_vars->amos_page_pa = ia64_tpa((u64)amos_page); - xpc_vars->amos_page = amos_page; /* save for next load of XPC */ - - /* clear xpc_vars_part */ - memset((u64 *)xpc_vars_part, 0, sizeof(struct xpc_vars_part) * - xp_max_npartitions); - - /* initialize the activate IRQ related AMO variables */ - for (i = 0; i < xp_nasid_mask_words; i++) - (void)xpc_IPI_init(XPC_ACTIVATE_IRQ_AMOS + i); - - /* initialize the engaged remote partitions related AMO variables */ - (void)xpc_IPI_init(XPC_ENGAGED_PARTITIONS_AMO); - (void)xpc_IPI_init(XPC_DISENGAGE_REQUEST_AMO); - - /* timestamp of when reserved page was setup by XPC */ - rp->stamp = CURRENT_TIME; + if (xpc_rsvd_page_init(rp) != xpSuccess) + return NULL; /* + * Set timestamp of when reserved page was setup by XPC. * This signifies to the remote partition that our reserved * page is initialized. */ - rp->vars_pa = __pa(xpc_vars); + rp->stamp = CURRENT_TIME; return rp; } @@ -465,7 +395,7 @@ xpc_get_remote_rp(int nasid, u64 *discovered_nasids, /* pull over the reserved page header and part_nasids mask */ ret = xp_remote_memcpy(remote_rp, (void *)*remote_rp_pa, - XPC_RP_HEADER_SIZE + xp_nasid_mask_bytes); + XPC_RP_HEADER_SIZE + xp_sizeof_nasid_mask); if (ret != xpSuccess) return ret; @@ -476,19 +406,28 @@ xpc_get_remote_rp(int nasid, u64 *discovered_nasids, discovered_nasids[i] |= remote_part_nasids[i]; } - /* check that the partid is for another partition */ + /* check that the partid is valid and is for another partition */ - if (remote_rp->partid < 0 || remote_rp->partid >= xp_max_npartitions) + if (remote_rp->SAL_partid < 0 || + remote_rp->SAL_partid >= xp_max_npartitions) { return xpInvalidPartid; + } - if (remote_rp->partid == sn_partition_id) + if (remote_rp->SAL_partid == sn_partition_id) return xpLocalPartid; + /* see if the rest of the reserved page has been set up by XPC */ + if (timespec_equal(&remote_rp->stamp, &ZERO_STAMP)) + return xpRsvdPageNotSet; + if (XPC_VERSION_MAJOR(remote_rp->version) != XPC_VERSION_MAJOR(XPC_RP_VERSION)) { return xpBadVersion; } + if (remote_rp->max_npartitions <= sn_partition_id) + return xpInvalidPartid; + return xpSuccess; } @@ -592,7 +531,7 @@ xpc_identify_act_IRQ_req(int nasid) int remote_rp_version; int reactivate = 0; int stamp_diff; - struct timespec remote_rp_stamp = { 0, 0 }; + struct timespec remote_rp_stamp = { 0, 0 }; /*>>> ZERO_STAMP */ short partid; struct xpc_partition *part; enum xp_retval ret; @@ -608,12 +547,12 @@ xpc_identify_act_IRQ_req(int nasid) return; } - remote_vars_pa = remote_rp->vars_pa; + remote_vars_pa = remote_rp->sn.vars_pa; remote_rp_version = remote_rp->version; if (XPC_SUPPORTS_RP_STAMP(remote_rp_version)) remote_rp_stamp = remote_rp->stamp; - partid = remote_rp->partid; + partid = remote_rp->SAL_partid; part = &xpc_partitions[partid]; /* pull over the cross partition variables */ @@ -977,7 +916,7 @@ xpc_discovery(void) enum xp_retval ret; remote_rp = xpc_kmalloc_cacheline_aligned(XPC_RP_HEADER_SIZE + - xp_nasid_mask_bytes, + xp_sizeof_nasid_mask, GFP_KERNEL, &remote_rp_base); if (remote_rp == NULL) return; @@ -1063,9 +1002,9 @@ xpc_discovery(void) continue; } - remote_vars_pa = remote_rp->vars_pa; + remote_vars_pa = remote_rp->sn.vars_pa; - partid = remote_rp->partid; + partid = remote_rp->SAL_partid; part = &xpc_partitions[partid]; /* pull over the cross partition variables */ @@ -1155,5 +1094,5 @@ xpc_initiate_partid_to_nasids(short partid, void *nasid_mask) part_nasid_pa = (u64)XPC_RP_PART_NASIDS(part->remote_rp_pa); return xp_remote_memcpy(nasid_mask, (void *)part_nasid_pa, - xp_nasid_mask_bytes); + xp_sizeof_nasid_mask); } |