patch-2.4.19 linux-2.4.19/arch/ia64/sn/io/sn1/mem_refcnt.c

• Lines: 222
• Date: Fri Aug 2 17:39:43 2002
• Orig file: linux-2.4.18/arch/ia64/sn/io/sn1/mem_refcnt.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/arch/ia64/sn/io/sn1/mem_refcnt.c linux-2.4.19/arch/ia64/sn/io/sn1/mem_refcnt.c
@@ -0,0 +1,221 @@
+/* $Id: mem_refcnt.c,v 1.1 2002/02/28 17:31:25 marcelo Exp $
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ * Copyright (C) 1992 - 1997, 2000-2002 Silicon Graphics, Inc. All rights reserved.
+ */
+
+#include <linux/config.h>
+#include <linux/types.h>
+#include <asm/sn/arch.h>
+#include <asm/sn/sgi.h>
+#include <asm/sn/io.h>
+#include <asm/sn/sn_cpuid.h>
+#include <asm/sn/invent.h>
+#include <asm/sn/hcl.h>
+#include <asm/sn/hcl_util.h>
+#include <asm/sn/nodepda.h>
+#include <asm/sn/iograph.h>
+#include <asm/sn/sn1/mem_refcnt.h>
+#include <asm/sn/sn1/hwcntrs.h>
+#include <asm/sn/sn1/hubspc.h>
+// From numa_hw.h
+
+#define MIGR_COUNTER_MAX_GET(nodeid) \
+        (NODEPDA_MCD((nodeid))->migr_system_kparms.migr_threshold_reference)
+/*
+ * Get the Absolute Theshold
+ */
+#define MIGR_THRESHOLD_ABS_GET(nodeid) ( \
+        MD_MIG_VALUE_THRESH_GET(COMPACT_TO_NASID_NODEID(nodeid)))
+/*
+ * Get the current Differential Threshold
+ */
+#define MIGR_THRESHOLD_DIFF_GET(nodeid) \
+        (NODEPDA_MCD(nodeid)->migr_as_kparms.migr_base_threshold)
+
+#define NUM_OF_HW_PAGES_PER_SW_PAGE()   (NBPP / MD_PAGE_SIZE)
+
+// #include "migr_control.h"
+
+int
+mem_refcnt_attach(devfs_handle_t hub)
+{
+#ifndef CONFIG_IA64_SGI_SN
+        devfs_handle_t refcnt_dev;
+        
+        hwgraph_char_device_add(hub,
+                                "refcnt",
+                                "hubspc_", 
+				&refcnt_dev);
+        device_info_set(refcnt_dev, (void*)(ulong)HUBSPC_REFCOUNTERS);
+#endif
+
+        return (0);
+}
+
+
+/*ARGSUSED*/
+int
+mem_refcnt_open(devfs_handle_t *devp, mode_t oflag, int otyp, cred_t *crp)
+{
+        cnodeid_t node;
+
+        node = master_node_get(*devp);
+
+        ASSERT( (node >= 0) && (node < numnodes) );
+
+        if (NODEPDA(node)->migr_refcnt_counterbuffer == NULL) {
+                return (ENODEV);
+        }
+
+        ASSERT( NODEPDA(node)->migr_refcnt_counterbase != NULL );
+        ASSERT( NODEPDA(node)->migr_refcnt_cbsize != (size_t)0 );
+
+        return (0);
+}
+
+/*ARGSUSED*/
+int
+mem_refcnt_close(devfs_handle_t dev, int oflag, int otyp, cred_t *crp)
+{
+        return 0;
+}
+
+/*ARGSUSED*/
+int
+mem_refcnt_mmap(devfs_handle_t dev, vhandl_t *vt, off_t off, size_t len, uint prot)
+{
+        cnodeid_t node;
+        int errcode;
+        char* buffer;
+        size_t blen;
+        
+        node = master_node_get(dev);
+
+        ASSERT( (node >= 0) && (node < numnodes) );
+
+        ASSERT( NODEPDA(node)->migr_refcnt_counterbuffer != NULL);
+        ASSERT( NODEPDA(node)->migr_refcnt_counterbase != NULL );
+        ASSERT( NODEPDA(node)->migr_refcnt_cbsize != 0 );
+
+        /*
+         * XXXX deal with prot's somewhere around here....
+         */
+
+        buffer = NODEPDA(node)->migr_refcnt_counterbuffer;
+        blen = NODEPDA(node)->migr_refcnt_cbsize;
+
+        /*
+         * Force offset to be a multiple of sizeof(refcnt_t)
+         * We round up.
+         */
+
+        off = (((off - 1)/sizeof(refcnt_t)) + 1) * sizeof(refcnt_t);
+
+        if ( ((buffer + blen) - (buffer + off + len)) < 0 ) {
+                return (EPERM);
+        }
+
+        errcode = v_mapphys(vt,
+                            buffer + off,
+                            len);
+
+        return errcode;
+}
+
+/*ARGSUSED*/
+int
+mem_refcnt_unmap(devfs_handle_t dev, vhandl_t *vt)
+{
+        return 0;
+}
+
+/* ARGSUSED */
+int
+mem_refcnt_ioctl(devfs_handle_t dev,
+                 int cmd,
+                 void *arg,
+                 int mode,
+                 cred_t *cred_p,
+                 int *rvalp)
+{
+        cnodeid_t node;
+        int errcode;
+	extern int numnodes;
+        
+        node = master_node_get(dev);
+
+        ASSERT( (node >= 0) && (node < numnodes) );
+
+        ASSERT( NODEPDA(node)->migr_refcnt_counterbuffer != NULL);
+        ASSERT( NODEPDA(node)->migr_refcnt_counterbase != NULL );
+        ASSERT( NODEPDA(node)->migr_refcnt_cbsize != 0 );
+
+        errcode = 0;
+        
+        switch (cmd) {
+        case RCB_INFO_GET:
+        {
+                rcb_info_t rcb;
+                
+                rcb.rcb_len = NODEPDA(node)->migr_refcnt_cbsize;
+                
+                rcb.rcb_sw_sets = NODEPDA(node)->migr_refcnt_numsets;
+                rcb.rcb_sw_counters_per_set = numnodes;
+                rcb.rcb_sw_counter_size = sizeof(refcnt_t);
+
+                rcb.rcb_base_pages = NODEPDA(node)->migr_refcnt_numsets /
+                                     NUM_OF_HW_PAGES_PER_SW_PAGE();  
+                rcb.rcb_base_page_size = NBPP;
+                rcb.rcb_base_paddr = ctob(slot_getbasepfn(node, 0));
+                
+                rcb.rcb_cnodeid = node;
+                rcb.rcb_granularity = MD_PAGE_SIZE;
+#ifdef LATER
+                rcb.rcb_hw_counter_max = MIGR_COUNTER_MAX_GET(node);
+                rcb.rcb_diff_threshold = MIGR_THRESHOLD_DIFF_GET(node);
+#endif
+                rcb.rcb_abs_threshold = MIGR_THRESHOLD_ABS_GET(node);
+                rcb.rcb_num_slots = MAX_MEM_SLOTS;
+
+                if (COPYOUT(&rcb, arg, sizeof(rcb_info_t))) {
+                        errcode = EFAULT;
+                }
+
+                break;
+        }
+        case RCB_SLOT_GET:
+        {
+                rcb_slot_t slot[MAX_MEM_SLOTS];
+                int s;
+                int nslots;
+
+                nslots = MAX_MEM_SLOTS;
+                ASSERT(nslots <= MAX_MEM_SLOTS);
+                for (s = 0; s < nslots; s++) {
+                        slot[s].base = (uint64_t)ctob(slot_getbasepfn(node, s));
+#ifdef LATER
+                        slot[s].size  = (uint64_t)ctob(slot_getsize(node, s));
+#else
+                        slot[s].size  = (uint64_t)1;
+#endif
+                }
+                if (COPYOUT(&slot[0], arg, nslots * sizeof(rcb_slot_t))) {
+                        errcode = EFAULT;
+                }
+                
+                *rvalp = nslots;
+                break;
+        }
+                
+        default:
+                errcode = EINVAL;
+                break;
+
+        }
+        
+        return errcode;
+}