1 files changed, 171 insertions, 35 deletions

diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index 8cfade9510a4..794f6eb54cd3 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -5,7 +5,7 @@
  *
  * SGI UV APIC functions (note: not an Intel compatible APIC)
  *
- * Copyright (C) 2007-2010 Silicon Graphics, Inc. All rights reserved.
+ * Copyright (C) 2007-2013 Silicon Graphics, Inc. All rights reserved.
  */
 #include <linux/cpumask.h>
 #include <linux/hardirq.h>
@@ -91,10 +91,16 @@ static int __init early_get_pnodeid(void)
         m_n_config.v = uv_early_read_mmr(UVH_RH_GAM_CONFIG_MMR);
         uv_min_hub_revision_id = node_id.s.revision;
 
-        if (node_id.s.part_number == UV2_HUB_PART_NUMBER)
-                uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
-        if (node_id.s.part_number == UV2_HUB_PART_NUMBER_X)
+        switch (node_id.s.part_number) {
+        case UV2_HUB_PART_NUMBER:
+        case UV2_HUB_PART_NUMBER_X:
                 uv_min_hub_revision_id += UV2_HUB_REVISION_BASE - 1;
+                break;
+        case UV3_HUB_PART_NUMBER:
+        case UV3_HUB_PART_NUMBER_X:
+                uv_min_hub_revision_id += UV3_HUB_REVISION_BASE - 1;
+                break;
+        }
 
         uv_hub_info->hub_revision = uv_min_hub_revision_id;
         pnode = (node_id.s.node_id >> 1) & ((1 << m_n_config.s.n_skt) - 1);
@@ -130,13 +136,16 @@ static void __init uv_set_apicid_hibit(void)
 
 static int __init uv_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
-        int pnodeid, is_uv1, is_uv2;
+        int pnodeid, is_uv1, is_uv2, is_uv3;
 
         is_uv1 = !strcmp(oem_id, "SGI");
         is_uv2 = !strcmp(oem_id, "SGI2");
-        if (is_uv1 || is_uv2) {
+        is_uv3 = !strncmp(oem_id, "SGI3", 4);   /* there are varieties of UV3 */
+        if (is_uv1 || is_uv2 || is_uv3) {
                 uv_hub_info->hub_revision =
-                        is_uv1 ? UV1_HUB_REVISION_BASE : UV2_HUB_REVISION_BASE;
+                        (is_uv1 ? UV1_HUB_REVISION_BASE :
+                        (is_uv2 ? UV2_HUB_REVISION_BASE :
+                                  UV3_HUB_REVISION_BASE));
                 pnodeid = early_get_pnodeid();
                 early_get_apic_pnode_shift();
                 x86_platform.is_untracked_pat_range =  uv_is_untracked_pat_range;
@@ -450,14 +459,17 @@ static __init void map_high(char *id, unsigned long base, int pshift,
 
         paddr = base << pshift;
         bytes = (1UL << bshift) * (max_pnode + 1);
-        printk(KERN_INFO "UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr,
-                                                paddr + bytes);
+        if (!paddr) {
+                pr_info("UV: Map %s_HI base address NULL\n", id);
+                return;
+        }
+        pr_info("UV: Map %s_HI 0x%lx - 0x%lx\n", id, paddr, paddr + bytes);
         if (map_type == map_uc)
                 init_extra_mapping_uc(paddr, bytes);
         else
                 init_extra_mapping_wb(paddr, bytes);
-
 }
+
 static __init void map_gru_high(int max_pnode)
 {
         union uvh_rh_gam_gru_overlay_config_mmr_u gru;
@@ -468,7 +480,8 @@ static __init void map_gru_high(int max_pnode)
                 map_high("GRU", gru.s.base, shift, shift, max_pnode, map_wb);
                 gru_start_paddr = ((u64)gru.s.base << shift);
                 gru_end_paddr = gru_start_paddr + (1UL << shift) * (max_pnode + 1);
-
+        } else {
+                pr_info("UV: GRU disabled\n");
         }
 }
 
@@ -480,23 +493,146 @@ static __init void map_mmr_high(int max_pnode)
         mmr.v = uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR);
         if (mmr.s.enable)
                 map_high("MMR", mmr.s.base, shift, shift, max_pnode, map_uc);
+        else
+                pr_info("UV: MMR disabled\n");
+}
+
+/*
+ * This commonality works because both 0 & 1 versions of the MMIOH OVERLAY
+ * and REDIRECT MMR regs are exactly the same on UV3.
+ */
+struct mmioh_config {
+        unsigned long overlay;
+        unsigned long redirect;
+        char *id;
+};
+
+static __initdata struct mmioh_config mmiohs[] = {
+        {
+                UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR,
+                UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR,
+                "MMIOH0"
+        },
+        {
+                UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG1_MMR,
+                UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG1_MMR,
+                "MMIOH1"
+        },
+};
+
+static __init void map_mmioh_high_uv3(int index, int min_pnode, int max_pnode)
+{
+        union uv3h_rh_gam_mmioh_overlay_config0_mmr_u overlay;
+        unsigned long mmr;
+        unsigned long base;
+        int i, n, shift, m_io, max_io;
+        int nasid, lnasid, fi, li;
+        char *id;
+
+        id = mmiohs[index].id;
+        overlay.v = uv_read_local_mmr(mmiohs[index].overlay);
+        pr_info("UV: %s overlay 0x%lx base:0x%x m_io:%d\n",
+                id, overlay.v, overlay.s3.base, overlay.s3.m_io);
+        if (!overlay.s3.enable) {
+                pr_info("UV: %s disabled\n", id);
+                return;
+        }
+
+        shift = UV3H_RH_GAM_MMIOH_OVERLAY_CONFIG0_MMR_BASE_SHFT;
+        base = (unsigned long)overlay.s3.base;
+        m_io = overlay.s3.m_io;
+        mmr = mmiohs[index].redirect;
+        n = UV3H_RH_GAM_MMIOH_REDIRECT_CONFIG0_MMR_DEPTH;
+        min_pnode *= 2;                         /* convert to NASID */
+        max_pnode *= 2;
+        max_io = lnasid = fi = li = -1;
+
+        for (i = 0; i < n; i++) {
+                union uv3h_rh_gam_mmioh_redirect_config0_mmr_u redirect;
+
+                redirect.v = uv_read_local_mmr(mmr + i * 8);
+                nasid = redirect.s3.nasid;
+                if (nasid < min_pnode || max_pnode < nasid)
+                        nasid = -1;             /* invalid NASID */
+
+                if (nasid == lnasid) {
+                        li = i;
+                        if (i != n-1)           /* last entry check */
+                                continue;
+                }
+
+                /* check if we have a cached (or last) redirect to print */
+                if (lnasid != -1 || (i == n-1 && nasid != -1))  {
+                        unsigned long addr1, addr2;
+                        int f, l;
+
+                        if (lnasid == -1) {
+                                f = l = i;
+                                lnasid = nasid;
+                        } else {
+                                f = fi;
+                                l = li;
+                        }
+                        addr1 = (base << shift) +
+                                f * (unsigned long)(1 << m_io);
+                        addr2 = (base << shift) +
+                                (l + 1) * (unsigned long)(1 << m_io);
+                        pr_info("UV: %s[%03d..%03d] NASID 0x%04x ADDR 0x%016lx - 0x%016lx\n",
+                                id, fi, li, lnasid, addr1, addr2);
+                        if (max_io < l)
+                                max_io = l;
+                }
+                fi = li = i;
+                lnasid = nasid;
+        }
+
+        pr_info("UV: %s base:0x%lx shift:%d M_IO:%d MAX_IO:%d\n",
+                id, base, shift, m_io, max_io);
+
+        if (max_io >= 0)
+                map_high(id, base, shift, m_io, max_io, map_uc);
 }
 
-static __init void map_mmioh_high(int max_pnode)
+static __init void map_mmioh_high(int min_pnode, int max_pnode)
 {
         union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
-        int shift;
+        unsigned long mmr, base;
+        int shift, enable, m_io, n_io;
 
-        mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
-        if (is_uv1_hub() && mmioh.s1.enable) {
-                shift = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
-                map_high("MMIOH", mmioh.s1.base, shift, mmioh.s1.m_io,
-                        max_pnode, map_uc);
+        if (is_uv3_hub()) {
+                /* Map both MMIOH Regions */
+                map_mmioh_high_uv3(0, min_pnode, max_pnode);
+                map_mmioh_high_uv3(1, min_pnode, max_pnode);
+                return;
         }
-        if (is_uv2_hub() && mmioh.s2.enable) {
+
+        if (is_uv1_hub()) {
+                mmr = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
+                shift = UV1H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
+                mmioh.v = uv_read_local_mmr(mmr);
+                enable = !!mmioh.s1.enable;
+                base = mmioh.s1.base;
+                m_io = mmioh.s1.m_io;
+                n_io = mmioh.s1.n_io;
+        } else if (is_uv2_hub()) {
+                mmr = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR;
                 shift = UV2H_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR_BASE_SHFT;
-                map_high("MMIOH", mmioh.s2.base, shift, mmioh.s2.m_io,
-                        max_pnode, map_uc);
+                mmioh.v = uv_read_local_mmr(mmr);
+                enable = !!mmioh.s2.enable;
+                base = mmioh.s2.base;
+                m_io = mmioh.s2.m_io;
+                n_io = mmioh.s2.n_io;
+        } else
+                return;
+
+        if (enable) {
+                max_pnode &= (1 << n_io) - 1;
+                pr_info(
+                    "UV: base:0x%lx shift:%d N_IO:%d M_IO:%d max_pnode:0x%x\n",
+                        base, shift, m_io, n_io, max_pnode);
+                map_high("MMIOH", base, shift, m_io, max_pnode, map_uc);
+        } else {
+                pr_info("UV: MMIOH disabled\n");
         }
 }
 
@@ -724,42 +860,41 @@ void uv_nmi_init(void)
 void __init uv_system_init(void)
 {
         union uvh_rh_gam_config_mmr_u  m_n_config;
-        union uvh_rh_gam_mmioh_overlay_config_mmr_u mmioh;
         union uvh_node_id_u node_id;
         unsigned long gnode_upper, lowmem_redir_base, lowmem_redir_size;
-        int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val, n_io;
-        int gnode_extra, max_pnode = 0;
+        int bytes, nid, cpu, lcpu, pnode, blade, i, j, m_val, n_val;
+        int gnode_extra, min_pnode = 999999, max_pnode = -1;
         unsigned long mmr_base, present, paddr;
-        unsigned short pnode_mask, pnode_io_mask;
+        unsigned short pnode_mask;
+        char *hub = (is_uv1_hub() ? "UV1" :
+                    (is_uv2_hub() ? "UV2" :
+                                    "UV3"));
 
-        printk(KERN_INFO "UV: Found %s hub\n", is_uv1_hub() ? "UV1" : "UV2");
+        pr_info("UV: Found %s hub\n", hub);
         map_low_mmrs();
 
         m_n_config.v = uv_read_local_mmr(UVH_RH_GAM_CONFIG_MMR );
         m_val = m_n_config.s.m_skt;
         n_val = m_n_config.s.n_skt;
-        mmioh.v = uv_read_local_mmr(UVH_RH_GAM_MMIOH_OVERLAY_CONFIG_MMR);
-        n_io = is_uv1_hub() ? mmioh.s1.n_io : mmioh.s2.n_io;
+        pnode_mask = (1 << n_val) - 1;
         mmr_base =
             uv_read_local_mmr(UVH_RH_GAM_MMR_OVERLAY_CONFIG_MMR) &
             ~UV_MMR_ENABLE;
-        pnode_mask = (1 << n_val) - 1;
-        pnode_io_mask = (1 << n_io) - 1;
 
         node_id.v = uv_read_local_mmr(UVH_NODE_ID);
         gnode_extra = (node_id.s.node_id & ~((1 << n_val) - 1)) >> 1;
         gnode_upper = ((unsigned long)gnode_extra  << m_val);
-        printk(KERN_INFO "UV: N %d, M %d, N_IO: %d, gnode_upper 0x%lx, gnode_extra 0x%x, pnode_mask 0x%x, pnode_io_mask 0x%x\n",
-                        n_val, m_val, n_io, gnode_upper, gnode_extra, pnode_mask, pnode_io_mask);
+        pr_info("UV: N:%d M:%d pnode_mask:0x%x gnode_upper/extra:0x%lx/0x%x\n",
+                        n_val, m_val, pnode_mask, gnode_upper, gnode_extra);
 
-        printk(KERN_DEBUG "UV: global MMR base 0x%lx\n", mmr_base);
+        pr_info("UV: global MMR base 0x%lx\n", mmr_base);
 
         for(i = 0; i < UVH_NODE_PRESENT_TABLE_DEPTH; i++)
                 uv_possible_blades +=
                   hweight64(uv_read_local_mmr( UVH_NODE_PRESENT_TABLE + i * 8));
 
         /* uv_num_possible_blades() is really the hub count */
-        printk(KERN_INFO "UV: Found %d blades, %d hubs\n",
+        pr_info("UV: Found %d blades, %d hubs\n",
                         is_uv1_hub() ? uv_num_possible_blades() :
                         (uv_num_possible_blades() + 1) / 2,
                         uv_num_possible_blades());
@@ -794,6 +929,7 @@ void __init uv_system_init(void)
                         uv_blade_info[blade].nr_possible_cpus = 0;
                         uv_blade_info[blade].nr_online_cpus = 0;
                         spin_lock_init(&uv_blade_info[blade].nmi_lock);
+                        min_pnode = min(pnode, min_pnode);
                         max_pnode = max(pnode, max_pnode);
                         blade++;
                 }
@@ -856,7 +992,7 @@ void __init uv_system_init(void)
 
         map_gru_high(max_pnode);
         map_mmr_high(max_pnode);
-        map_mmioh_high(max_pnode & pnode_io_mask);
+        map_mmioh_high(min_pnode, max_pnode);
 
         uv_cpu_init();
         uv_scir_register_cpu_notifier();