diff options
Diffstat (limited to 'arch/ia64/sn/io/sn1/hub_intr.c')
| -rw-r--r-- | arch/ia64/sn/io/sn1/hub_intr.c | 307 |
1 files changed, 0 insertions, 307 deletions
diff --git a/arch/ia64/sn/io/sn1/hub_intr.c b/arch/ia64/sn/io/sn1/hub_intr.c deleted file mode 100644 index 474f6c6b28524d..00000000000000 --- a/arch/ia64/sn/io/sn1/hub_intr.c +++ /dev/null @@ -1,307 +0,0 @@ -/* $Id: hub_intr.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/types.h> -#include <linux/slab.h> -#include <asm/sn/types.h> -#include <asm/sn/sgi.h> -#include <asm/sn/driver.h> -#include <asm/sn/iograph.h> -#include <asm/param.h> -#include <asm/sn/pio.h> -#include <asm/sn/xtalk/xwidget.h> -#include <asm/sn/io.h> -#include <asm/sn/sn_private.h> -#include <asm/sn/addrs.h> -#include <asm/sn/invent.h> -#include <asm/sn/hcl.h> -#include <asm/sn/hcl_util.h> -#include <asm/sn/intr.h> -#include <asm/sn/xtalk/xtalkaddrs.h> -#include <asm/sn/klconfig.h> -#include <asm/sn/sn_cpuid.h> - -extern xtalk_provider_t hub_provider; - -/* ARGSUSED */ -void -hub_intr_init(devfs_handle_t hubv) -{ -} - -/* - * hub_device_desc_update - * Update the passed in device descriptor with the actual the - * target cpu number and interrupt priority level. - * NOTE : These might be the same as the ones passed in thru - * the descriptor. - */ -static void -hub_device_desc_update(device_desc_t dev_desc, - ilvl_t intr_swlevel, - cpuid_t cpu) -{ -} - -int allocate_my_bit = INTRCONNECT_ANYBIT; - -/* - * Allocate resources required for an interrupt as specified in dev_desc. - * Returns a hub interrupt handle on success, or 0 on failure. - */ -static hub_intr_t -do_hub_intr_alloc(devfs_handle_t dev, /* which crosstalk device */ - device_desc_t dev_desc, /* device descriptor */ - devfs_handle_t owner_dev, /* owner of this interrupt, if known */ - int uncond_nothread) /* unconditionally non-threaded */ -{ - cpuid_t cpu = (cpuid_t)0; /* cpu to receive interrupt */ - int cpupicked = 0; - int bit; /* interrupt vector */ - /*REFERENCED*/ - int intr_resflags = 0; - hub_intr_t intr_hdl; - cnodeid_t nodeid; /* node to receive interrupt */ - /*REFERENCED*/ - nasid_t nasid; /* nasid to receive interrupt */ - struct xtalk_intr_s *xtalk_info; - iopaddr_t xtalk_addr; /* xtalk addr on hub to set intr */ - xwidget_info_t xwidget_info; /* standard crosstalk widget info handle */ - char *intr_name = NULL; - ilvl_t intr_swlevel = (ilvl_t)0; - extern int default_intr_pri; - extern void synergy_intr_alloc(int, int); - - - if (dev_desc) { - if (dev_desc->flags & D_INTR_ISERR) { - intr_resflags = II_ERRORINT; - } else if (!uncond_nothread && !(dev_desc->flags & D_INTR_NOTHREAD)) { - intr_resflags = II_THREADED; - } else { - /* Neither an error nor a thread. */ - intr_resflags = 0; - } - } else { - intr_swlevel = default_intr_pri; - if (!uncond_nothread) - intr_resflags = II_THREADED; - } - - /* XXX - Need to determine if the interrupt should be threaded. */ - - /* If the cpu has not been picked already then choose a candidate - * interrupt target and reserve the interrupt bit - */ - if (!cpupicked) { - cpu = intr_heuristic(dev,dev_desc,allocate_my_bit, - intr_resflags,owner_dev, - intr_name,&bit); - } - - /* At this point we SHOULD have a valid cpu */ - if (cpu == CPU_NONE) { -#if defined(SUPPORT_PRINTING_V_FORMAT) - printk(KERN_WARNING "%v hub_intr_alloc could not allocate interrupt\n", - owner_dev); -#else - printk(KERN_WARNING "%p hub_intr_alloc could not allocate interrupt\n", - (void *)owner_dev); -#endif - return(0); - - } - - /* If the cpu has been picked already (due to the bridge data - * corruption bug) then try to reserve an interrupt bit . - */ - if (cpupicked) { - bit = intr_reserve_level(cpu, allocate_my_bit, - intr_resflags, - owner_dev, intr_name); - if (bit < 0) { -#if defined(SUPPORT_PRINTING_V_FORMAT) - printk(KERN_WARNING "Could not reserve an interrupt bit for cpu " - " %d and dev %v\n", - cpu,owner_dev); -#else - printk(KERN_WARNING "Could not reserve an interrupt bit for cpu " - " %d and dev %p\n", - (int)cpu, (void *)owner_dev); -#endif - - return(0); - } - } - - nodeid = cpuid_to_cnodeid(cpu); - nasid = cpuid_to_nasid(cpu); - xtalk_addr = HUBREG_AS_XTALKADDR(nasid, PIREG(PI_INT_PEND_MOD, cpuid_to_subnode(cpu))); - - /* - * Allocate an interrupt handle, and fill it in. There are two - * pieces to an interrupt handle: the piece needed by generic - * xtalk code which is used by crosstalk device drivers, and - * the piece needed by low-level IP27 hardware code. - */ - intr_hdl = snia_kmem_alloc_node(sizeof(struct hub_intr_s), KM_NOSLEEP, nodeid); - ASSERT_ALWAYS(intr_hdl); - - /* - * Fill in xtalk information for generic xtalk interfaces that - * operate on xtalk_intr_hdl's. - */ - xtalk_info = &intr_hdl->i_xtalk_info; - xtalk_info->xi_dev = dev; - xtalk_info->xi_vector = bit; - xtalk_info->xi_addr = xtalk_addr; - - /* - * Regardless of which CPU we ultimately interrupt, a given crosstalk - * widget always handles interrupts (and PIO and DMA) through its - * designated "master" crosstalk provider. - */ - xwidget_info = xwidget_info_get(dev); - if (xwidget_info) - xtalk_info->xi_target = xwidget_info_masterid_get(xwidget_info); - - /* Fill in low level hub information for hub_* interrupt interface */ - intr_hdl->i_swlevel = intr_swlevel; - intr_hdl->i_cpuid = cpu; - intr_hdl->i_bit = bit; - intr_hdl->i_flags = HUB_INTR_IS_ALLOCED; - - /* Store the actual interrupt priority level & interrupt target - * cpu back in the device descriptor. - */ - hub_device_desc_update(dev_desc, intr_swlevel, cpu); - synergy_intr_alloc((int)bit, (int)cpu); - return(intr_hdl); -} - -/* - * Allocate resources required for an interrupt as specified in dev_desc. - * Returns a hub interrupt handle on success, or 0 on failure. - */ -hub_intr_t -hub_intr_alloc( devfs_handle_t dev, /* which crosstalk device */ - device_desc_t dev_desc, /* device descriptor */ - devfs_handle_t owner_dev) /* owner of this interrupt, if known */ -{ - return(do_hub_intr_alloc(dev, dev_desc, owner_dev, 0)); -} - -/* - * Allocate resources required for an interrupt as specified in dev_desc. - * Uncondtionally request non-threaded, regardless of what the device - * descriptor might say. - * Returns a hub interrupt handle on success, or 0 on failure. - */ -hub_intr_t -hub_intr_alloc_nothd(devfs_handle_t dev, /* which crosstalk device */ - device_desc_t dev_desc, /* device descriptor */ - devfs_handle_t owner_dev) /* owner of this interrupt, if known */ -{ - return(do_hub_intr_alloc(dev, dev_desc, owner_dev, 1)); -} - -/* - * Free resources consumed by intr_alloc. - */ -void -hub_intr_free(hub_intr_t intr_hdl) -{ - cpuid_t cpu = intr_hdl->i_cpuid; - int bit = intr_hdl->i_bit; - xtalk_intr_t xtalk_info; - - if (intr_hdl->i_flags & HUB_INTR_IS_CONNECTED) { - /* Setting the following fields in the xtalk interrupt info - * clears the interrupt target register in the xtalk user - */ - xtalk_info = &intr_hdl->i_xtalk_info; - xtalk_info->xi_dev = NODEV; - xtalk_info->xi_vector = 0; - xtalk_info->xi_addr = 0; - hub_intr_disconnect(intr_hdl); - } - - if (intr_hdl->i_flags & HUB_INTR_IS_ALLOCED) - kfree(intr_hdl); - - intr_unreserve_level(cpu, bit); -} - - -/* - * Associate resources allocated with a previous hub_intr_alloc call with the - * described handler, arg, name, etc. - */ -/*ARGSUSED*/ -int -hub_intr_connect( hub_intr_t intr_hdl, /* xtalk intr resource handle */ - xtalk_intr_setfunc_t setfunc, /* func to set intr hw */ - void *setfunc_arg) /* arg to setfunc */ -{ - int rv; - cpuid_t cpu = intr_hdl->i_cpuid; - int bit = intr_hdl->i_bit; - extern int synergy_intr_connect(int, int); - - ASSERT(intr_hdl->i_flags & HUB_INTR_IS_ALLOCED); - - rv = intr_connect_level(cpu, bit, intr_hdl->i_swlevel, NULL); - if (rv < 0) - return(rv); - - intr_hdl->i_xtalk_info.xi_setfunc = setfunc; - intr_hdl->i_xtalk_info.xi_sfarg = setfunc_arg; - - if (setfunc) (*setfunc)((xtalk_intr_t)intr_hdl); - - intr_hdl->i_flags |= HUB_INTR_IS_CONNECTED; - return(synergy_intr_connect((int)bit, (int)cpu)); -} - - -/* - * Disassociate handler with the specified interrupt. - */ -void -hub_intr_disconnect(hub_intr_t intr_hdl) -{ - /*REFERENCED*/ - int rv; - cpuid_t cpu = intr_hdl->i_cpuid; - int bit = intr_hdl->i_bit; - xtalk_intr_setfunc_t setfunc; - - setfunc = intr_hdl->i_xtalk_info.xi_setfunc; - - /* TBD: send disconnected interrupts somewhere harmless */ - if (setfunc) (*setfunc)((xtalk_intr_t)intr_hdl); - - rv = intr_disconnect_level(cpu, bit); - ASSERT(rv == 0); - intr_hdl->i_flags &= ~HUB_INTR_IS_CONNECTED; -} - - -/* - * Return a hwgraph vertex that represents the CPU currently - * targeted by an interrupt. - */ -devfs_handle_t -hub_intr_cpu_get(hub_intr_t intr_hdl) -{ - cpuid_t cpuid = intr_hdl->i_cpuid; - ASSERT(cpuid != CPU_NONE); - - return(cpuid_to_vertex(cpuid)); -} |