1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* 29 * Kstat support for X86 PCI driver 30 */ 31 32 #include <sys/conf.h> 33 #include <sys/mach_intr.h> 34 #include <sys/psm.h> 35 #include <sys/clock.h> 36 #include <io/pcplusmp/apic.h> 37 #include <io/pci/pci_var.h> 38 39 typedef struct pci_kstat_private { 40 ddi_intr_handle_impl_t *hdlp; 41 dev_info_t *rootnex_dip; 42 } pci_kstat_private_t; 43 44 static struct { 45 kstat_named_t ihks_name; 46 kstat_named_t ihks_type; 47 kstat_named_t ihks_cpu; 48 kstat_named_t ihks_pil; 49 kstat_named_t ihks_time; 50 kstat_named_t ihks_ino; 51 kstat_named_t ihks_cookie; 52 kstat_named_t ihks_devpath; 53 kstat_named_t ihks_buspath; 54 } pci_ks_template = { 55 { "name", KSTAT_DATA_CHAR }, 56 { "type", KSTAT_DATA_CHAR }, 57 { "cpu", KSTAT_DATA_UINT64 }, 58 { "pil", KSTAT_DATA_UINT64 }, 59 { "time", KSTAT_DATA_UINT64 }, 60 { "ino", KSTAT_DATA_UINT64 }, 61 { "cookie", KSTAT_DATA_UINT64 }, 62 { "devpath", KSTAT_DATA_STRING }, 63 { "buspath", KSTAT_DATA_STRING }, 64 }; 65 66 static char ih_devpath[MAXPATHLEN]; 67 static char ih_buspath[MAXPATHLEN]; 68 static uint32_t pci_ks_inst; 69 static kmutex_t pci_ks_template_lock; 70 71 /*ARGSUSED*/ 72 static int 73 pci_ih_ks_update(kstat_t *ksp, int rw) 74 { 75 pci_kstat_private_t *private_data = 76 (pci_kstat_private_t *)ksp->ks_private; 77 dev_info_t *rootnex_dip = private_data->rootnex_dip; 78 ddi_intr_handle_impl_t *ih_p = private_data->hdlp; 79 dev_info_t *dip = ih_p->ih_dip; 80 int maxlen = 81 sizeof (pci_ks_template.ihks_name.value.c); 82 apic_get_intr_t intrinfo; 83 84 (void) snprintf(pci_ks_template.ihks_name.value.c, maxlen, "%s%d", 85 ddi_driver_name(dip), ddi_get_instance(dip)); 86 (void) ddi_pathname(dip, ih_devpath); 87 (void) ddi_pathname(rootnex_dip, ih_buspath); 88 kstat_named_setstr(&pci_ks_template.ihks_devpath, ih_devpath); 89 kstat_named_setstr(&pci_ks_template.ihks_buspath, ih_buspath); 90 91 /* 92 * ih_p->ih_vector really has an IRQ. Ask pci_get_intr_from_vecirq to 93 * return a vector since that's what PCItool will require intrd to use. 94 * 95 * PCItool will change the CPU routing of the IRQ that vector maps to. 96 * 97 * Note that although possibly multiple vectors can map to an IRQ, the 98 * vector returned below will always be the same for a given IRQ 99 * specified, and so all kstats for a given IRQ will report the same 100 * value for the ino field. 101 * 102 * --- 103 * 104 * Check for the enabled state, since kstats are set up when the ISR is 105 * added, not enabled. There may be a period where interrupts are not 106 * enabled even though they may have been added. 107 * 108 * It is also possible that the vector is for a dummy interrupt. 109 * pci_get_intr_from_vecirq will return failure in this case. 110 */ 111 intrinfo.avgi_cpu_id = 0; /* In case pci_get_intr_from_vecirq fails */ 112 intrinfo.avgi_req_flags = PSMGI_REQ_CPUID | PSMGI_REQ_VECTOR; 113 if ((ih_p->ih_state != DDI_IHDL_STATE_ENABLE) || 114 (pci_get_intr_from_vecirq(&intrinfo, ih_p->ih_vector, IS_IRQ) != 115 DDI_SUCCESS) || 116 (intrinfo.avgi_cpu_id & PSMGI_CPU_FLAGS)) { 117 118 (void) strcpy(pci_ks_template.ihks_type.value.c, "disabled"); 119 pci_ks_template.ihks_pil.value.ui64 = 0; 120 pci_ks_template.ihks_time.value.ui64 = 0; 121 pci_ks_template.ihks_cookie.value.ui64 = 0; 122 pci_ks_template.ihks_cpu.value.ui64 = 0; 123 pci_ks_template.ihks_ino.value.ui64 = 0; 124 125 /* Interrupt is user-bound. Remove kstat. */ 126 if (intrinfo.avgi_cpu_id & PSMGI_CPU_FLAGS) 127 (void) taskq_dispatch(system_taskq, 128 (void (*)(void *))pci_kstat_delete, ksp, TQ_SLEEP); 129 130 return (0); 131 } 132 133 /* 134 * Interrupt is valid (not a dummy), not user-bound to a specific cpu, 135 * and enabled. Update kstat fields. 136 */ 137 (void) strcpy(pci_ks_template.ihks_type.value.c, 138 DDI_INTR_IS_MSI_OR_MSIX(ih_p->ih_type) ? "msi" : "fixed"); 139 pci_ks_template.ihks_pil.value.ui64 = ih_p->ih_pri; 140 pci_ks_template.ihks_time.value.ui64 = 141 ((ihdl_plat_t *)ih_p->ih_private)->ip_ticks; 142 tsc_scalehrtime((hrtime_t *)&pci_ks_template.ihks_time.value.ui64); 143 pci_ks_template.ihks_cookie.value.ui64 = ih_p->ih_vector; 144 /* CPU won't be user bound at this point. */ 145 pci_ks_template.ihks_cpu.value.ui64 = intrinfo.avgi_cpu_id; 146 pci_ks_template.ihks_ino.value.ui64 = intrinfo.avgi_vector; 147 148 return (0); 149 } 150 151 152 void pci_kstat_create(kstat_t **kspp, dev_info_t *rootnex_dip, 153 ddi_intr_handle_impl_t *hdlp) 154 { 155 pci_kstat_private_t *private_data; 156 157 *kspp = kstat_create("pci_intrs", atomic_inc_32_nv(&pci_ks_inst), 158 _MODULE_NAME, "interrupts", KSTAT_TYPE_NAMED, 159 sizeof (pci_ks_template) / sizeof (kstat_named_t), 160 KSTAT_FLAG_VIRTUAL); 161 if (*kspp != NULL) { 162 163 private_data = 164 kmem_zalloc(sizeof (pci_kstat_private_t), KM_SLEEP); 165 private_data->hdlp = hdlp; 166 private_data->rootnex_dip = rootnex_dip; 167 168 (*kspp)->ks_private = private_data; 169 (*kspp)->ks_data_size += MAXPATHLEN * 2; 170 (*kspp)->ks_lock = &pci_ks_template_lock; 171 (*kspp)->ks_data = &pci_ks_template; 172 (*kspp)->ks_update = pci_ih_ks_update; 173 kstat_install(*kspp); 174 } 175 } 176 177 178 /* 179 * This function is invoked in two ways: 180 * - Thru taskq thread via pci_ih_ks_update to remove kstats for user-bound 181 * interrupts. 182 * - From the REMISR introp when an interrupt is being removed. 183 */ 184 void 185 pci_kstat_delete(kstat_t *ksp) 186 { 187 pci_kstat_private_t *kstat_private; 188 ddi_intr_handle_impl_t *hdlp; 189 190 if (ksp) { 191 kstat_private = ksp->ks_private; 192 hdlp = kstat_private->hdlp; 193 ((ihdl_plat_t *)hdlp->ih_private)->ip_ksp = NULL; 194 195 /* 196 * Delete the kstat before removing the private pointer, to 197 * prevent a kstat update from coming after private is freed. 198 */ 199 kstat_delete(ksp); 200 201 kmem_free(kstat_private, sizeof (pci_kstat_private_t)); 202 } 203 } 204