/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. * Copyright 2017 Joyent, Inc. */ /* * Copyright (c) 2010, Intel Corporation. * All rights reserved. */ /* * PSMI 1.1 extensions are supported only in 2.6 and later versions. * PSMI 1.2 extensions are supported only in 2.7 and later versions. * PSMI 1.3 and 1.4 extensions are supported in Solaris 10. * PSMI 1.5 extensions are supported in Solaris Nevada. * PSMI 1.6 extensions are supported in Solaris Nevada. * PSMI 1.7 extensions are supported in Solaris Nevada. */ #define PSMI_1_7 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /* * Part of mp_platfrom_common.c that's used only by pcplusmp & xpv_psm * but not apix. * These functions may be moved to xpv_psm later when apix and pcplusmp * are merged together */ /* * Local Function Prototypes */ static void apic_mark_vector(uchar_t oldvector, uchar_t newvector); static void apic_xlate_vector_free_timeout_handler(void *arg); static int apic_check_stuck_interrupt(apic_irq_t *irq_ptr, int old_bind_cpu, int new_bind_cpu, int apicindex, int intin_no, int which_irq, struct ioapic_reprogram_data *drep); static int apic_setup_irq_table(dev_info_t *dip, int irqno, struct apic_io_intr *intrp, struct intrspec *ispec, iflag_t *intr_flagp, int type); static void apic_try_deferred_reprogram(int ipl, int vect); static void delete_defer_repro_ent(int which_irq); static void apic_ioapic_wait_pending_clear(int ioapicindex, int intin_no); extern int apic_acpi_translate_pci_irq(dev_info_t *dip, int busid, int devid, int ipin, int *pci_irqp, iflag_t *intr_flagp); extern int apic_handle_pci_pci_bridge(dev_info_t *idip, int child_devno, int child_ipin, struct apic_io_intr **intrp); extern uchar_t acpi_find_ioapic(int irq); extern struct apic_io_intr *apic_find_io_intr_w_busid(int irqno, int busid); extern int apic_find_bus_id(int bustype); extern int apic_find_intin(uchar_t ioapic, uchar_t intin); extern void apic_record_rdt_entry(apic_irq_t *irqptr, int irq); extern int apic_sci_vect; extern iflag_t apic_sci_flags; /* ACPI HPET interrupt configuration; -1 if HPET not used */ extern int apic_hpet_vect; extern iflag_t apic_hpet_flags; extern int apic_intr_policy; extern char *psm_name; /* * number of bits per byte, from */ #define UCHAR_MAX UINT8_MAX /* Max wait time (in repetitions) for flags to clear in an RDT entry. */ extern int apic_max_reps_clear_pending; /* The irq # is implicit in the array index: */ struct ioapic_reprogram_data apic_reprogram_info[APIC_MAX_VECTOR+1]; /* * APIC_MAX_VECTOR + 1 is the maximum # of IRQs as well. ioapic_reprogram_info * is indexed by IRQ number, NOT by vector number. */ extern int apic_int_busy_mark; extern int apic_int_free_mark; extern int apic_diff_for_redistribution; extern int apic_sample_factor_redistribution; extern int apic_redist_cpu_skip; extern int apic_num_imbalance; extern int apic_num_rebind; /* timeout for xlate_vector, mark_vector */ int apic_revector_timeout = 16 * 10000; /* 160 millisec */ extern int apic_defconf; extern int apic_irq_translate; extern int apic_use_acpi_madt_only; /* 1=ONLY use MADT from ACPI */ extern uchar_t apic_io_vectbase[MAX_IO_APIC]; extern boolean_t ioapic_mask_workaround[MAX_IO_APIC]; /* * First available slot to be used as IRQ index into the apic_irq_table * for those interrupts (like MSI/X) that don't have a physical IRQ. */ extern int apic_first_avail_irq; /* * apic_defer_reprogram_lock ensures that only one processor is handling * deferred interrupt programming at *_intr_exit time. */ static lock_t apic_defer_reprogram_lock; /* * The current number of deferred reprogrammings outstanding */ uint_t apic_reprogram_outstanding = 0; #ifdef DEBUG /* * Counters that keep track of deferred reprogramming stats */ uint_t apic_intr_deferrals = 0; uint_t apic_intr_deliver_timeouts = 0; uint_t apic_last_ditch_reprogram_failures = 0; uint_t apic_deferred_setup_failures = 0; uint_t apic_defer_repro_total_retries = 0; uint_t apic_defer_repro_successes = 0; uint_t apic_deferred_spurious_enters = 0; #endif extern int apic_io_max; extern struct apic_io_intr *apic_io_intrp; uchar_t apic_vector_to_irq[APIC_MAX_VECTOR+1]; extern uint32_t eisa_level_intr_mask; /* At least MSB will be set if EISA bus */ extern int apic_pci_bus_total; extern uchar_t apic_single_pci_busid; /* * Following declarations are for revectoring; used when ISRs at different * IPLs share an irq. */ static lock_t apic_revector_lock; int apic_revector_pending = 0; static uchar_t *apic_oldvec_to_newvec; static uchar_t *apic_newvec_to_oldvec; /* ACPI Interrupt Source Override Structure ptr */ extern ACPI_MADT_INTERRUPT_OVERRIDE *acpi_isop; extern int acpi_iso_cnt; /* * Auto-configuration routines */ /* * Initialise vector->ipl and ipl->pri arrays. level_intr and irqtable * are also set to NULL. vector->irq is set to a value which cannot map * to a real irq to show that it is free. */ void apic_init_common(void) { int i, j, indx; int *iptr; /* * Initialize apic_ipls from apic_vectortoipl. This array is * used in apic_intr_enter to determine the IPL to use for the * corresponding vector. On some systems, due to hardware errata * and interrupt sharing, the IPL may not correspond to the IPL listed * in apic_vectortoipl (see apic_addspl and apic_delspl). */ for (i = 0; i < (APIC_AVAIL_VECTOR / APIC_VECTOR_PER_IPL); i++) { indx = i * APIC_VECTOR_PER_IPL; for (j = 0; j < APIC_VECTOR_PER_IPL; j++, indx++) apic_ipls[indx] = apic_vectortoipl[i]; } /* cpu 0 is always up (for now) */ apic_cpus[0].aci_status = APIC_CPU_ONLINE | APIC_CPU_INTR_ENABLE; iptr = (int *)&apic_irq_table[0]; for (i = 0; i <= APIC_MAX_VECTOR; i++) { apic_level_intr[i] = 0; *iptr++ = NULL; apic_vector_to_irq[i] = APIC_RESV_IRQ; /* These *must* be initted to B_TRUE! */ apic_reprogram_info[i].done = B_TRUE; apic_reprogram_info[i].irqp = NULL; apic_reprogram_info[i].tries = 0; apic_reprogram_info[i].bindcpu = 0; } /* * Allocate a dummy irq table entry for the reserved entry. * This takes care of the race between removing an irq and * clock detecting a CPU in that irq during interrupt load * sampling. */ apic_irq_table[APIC_RESV_IRQ] = kmem_zalloc(sizeof (apic_irq_t), KM_SLEEP); mutex_init(&airq_mutex, NULL, MUTEX_DEFAULT, NULL); } void ioapic_init_intr(int mask_apic) { int ioapic_ix; struct intrspec ispec; apic_irq_t *irqptr; int i, j; ulong_t iflag; LOCK_INIT_CLEAR(&apic_revector_lock); LOCK_INIT_CLEAR(&apic_defer_reprogram_lock); /* mask interrupt vectors */ for (j = 0; j < apic_io_max && mask_apic; j++) { int intin_max; ioapic_ix = j; /* Bits 23-16 define the maximum redirection entries */ intin_max = (ioapic_read(ioapic_ix, APIC_VERS_CMD) >> 16) & 0xff; for (i = 0; i <= intin_max; i++) ioapic_write(ioapic_ix, APIC_RDT_CMD + 2 * i, AV_MASK); } /* * Hack alert: deal with ACPI SCI interrupt chicken/egg here */ if (apic_sci_vect > 0) { /* * acpica has already done add_avintr(); we just * to finish the job by mimicing translate_irq() * * Fake up an intrspec and setup the tables */ ispec.intrspec_vec = apic_sci_vect; ispec.intrspec_pri = SCI_IPL; if (apic_setup_irq_table(NULL, apic_sci_vect, NULL, &ispec, &apic_sci_flags, DDI_INTR_TYPE_FIXED) < 0) { cmn_err(CE_WARN, "!apic: SCI setup failed"); return; } irqptr = apic_irq_table[apic_sci_vect]; iflag = intr_clear(); lock_set(&apic_ioapic_lock); /* Program I/O APIC */ (void) apic_setup_io_intr(irqptr, apic_sci_vect, B_FALSE); lock_clear(&apic_ioapic_lock); intr_restore(iflag); irqptr->airq_share++; } /* * Hack alert: deal with ACPI HPET interrupt chicken/egg here. */ if (apic_hpet_vect > 0) { /* * hpet has already done add_avintr(); we just need * to finish the job by mimicing translate_irq() * * Fake up an intrspec and setup the tables */ ispec.intrspec_vec = apic_hpet_vect; ispec.intrspec_pri = CBE_HIGH_PIL; if (apic_setup_irq_table(NULL, apic_hpet_vect, NULL, &ispec, &apic_hpet_flags, DDI_INTR_TYPE_FIXED) < 0) { cmn_err(CE_WARN, "!apic: HPET setup failed"); return; } irqptr = apic_irq_table[apic_hpet_vect]; iflag = intr_clear(); lock_set(&apic_ioapic_lock); /* Program I/O APIC */ (void) apic_setup_io_intr(irqptr, apic_hpet_vect, B_FALSE); lock_clear(&apic_ioapic_lock); intr_restore(iflag); irqptr->airq_share++; } } /* * Add mask bits to disable interrupt vector from happening * at or above IPL. In addition, it should remove mask bits * to enable interrupt vectors below the given IPL. * * Both add and delspl are complicated by the fact that different interrupts * may share IRQs. This can happen in two ways. * 1. The same H/W line is shared by more than 1 device * 1a. with interrupts at different IPLs * 1b. with interrupts at same IPL * 2. We ran out of vectors at a given IPL and started sharing vectors. * 1b and 2 should be handled gracefully, except for the fact some ISRs * will get called often when no interrupt is pending for the device. * For 1a, we handle it at the higher IPL. */ /*ARGSUSED*/ int apic_addspl_common(int irqno, int ipl, int min_ipl, int max_ipl) { uchar_t vector; ulong_t iflag; apic_irq_t *irqptr, *irqheadptr; int irqindex; ASSERT(max_ipl <= UCHAR_MAX); irqindex = IRQINDEX(irqno); if ((irqindex == -1) || (!apic_irq_table[irqindex])) return (PSM_FAILURE); mutex_enter(&airq_mutex); irqptr = irqheadptr = apic_irq_table[irqindex]; DDI_INTR_IMPLDBG((CE_CONT, "apic_addspl: dip=0x%p type=%d irqno=0x%x " "vector=0x%x\n", (void *)irqptr->airq_dip, irqptr->airq_mps_intr_index, irqno, irqptr->airq_vector)); while (irqptr) { if (VIRTIRQ(irqindex, irqptr->airq_share_id) == irqno) break; irqptr = irqptr->airq_next; } irqptr->airq_share++; mutex_exit(&airq_mutex); /* return if it is not hardware interrupt */ if (irqptr->airq_mps_intr_index == RESERVE_INDEX) return (PSM_SUCCESS); /* Or if there are more interupts at a higher IPL */ if (ipl != max_ipl) return (PSM_SUCCESS); /* * if apic_picinit() has not been called yet, just return. * At the end of apic_picinit(), we will call setup_io_intr(). */ if (!apic_picinit_called) return (PSM_SUCCESS); /* * Upgrade vector if max_ipl is not earlier ipl. If we cannot allocate, * return failure. */ if (irqptr->airq_ipl != max_ipl && !ioapic_mask_workaround[irqptr->airq_ioapicindex]) { vector = apic_allocate_vector(max_ipl, irqindex, 1); if (vector == 0) { irqptr->airq_share--; return (PSM_FAILURE); } irqptr = irqheadptr; apic_mark_vector(irqptr->airq_vector, vector); while (irqptr) { irqptr->airq_vector = vector; irqptr->airq_ipl = (uchar_t)max_ipl; /* * reprogram irq being added and every one else * who is not in the UNINIT state */ if ((VIRTIRQ(irqindex, irqptr->airq_share_id) == irqno) || (irqptr->airq_temp_cpu != IRQ_UNINIT)) { apic_record_rdt_entry(irqptr, irqindex); iflag = intr_clear(); lock_set(&apic_ioapic_lock); (void) apic_setup_io_intr(irqptr, irqindex, B_FALSE); lock_clear(&apic_ioapic_lock); intr_restore(iflag); } irqptr = irqptr->airq_next; } return (PSM_SUCCESS); } else if (irqptr->airq_ipl != max_ipl && ioapic_mask_workaround[irqptr->airq_ioapicindex]) { /* * We cannot upgrade the vector, but we can change * the IPL that this vector induces. * * Note that we subtract APIC_BASE_VECT from the vector * here because this array is used in apic_intr_enter * (no need to add APIC_BASE_VECT in that hot code * path since we can do it in the rarely-executed path * here). */ apic_ipls[irqptr->airq_vector - APIC_BASE_VECT] = (uchar_t)max_ipl; irqptr = irqheadptr; while (irqptr) { irqptr->airq_ipl = (uchar_t)max_ipl; irqptr = irqptr->airq_next; } return (PSM_SUCCESS); } ASSERT(irqptr); iflag = intr_clear(); lock_set(&apic_ioapic_lock); (void) apic_setup_io_intr(irqptr, irqindex, B_FALSE); lock_clear(&apic_ioapic_lock); intr_restore(iflag); return (PSM_SUCCESS); } /* * Recompute mask bits for the given interrupt vector. * If there is no interrupt servicing routine for this * vector, this function should disable interrupt vector * from happening at all IPLs. If there are still * handlers using the given vector, this function should * disable the given vector from happening below the lowest * IPL of the remaining hadlers. */ /*ARGSUSED*/ int apic_delspl_common(int irqno, int ipl, int min_ipl, int max_ipl) { uchar_t vector; uint32_t bind_cpu; int intin, irqindex; int ioapic_ix; apic_irq_t *irqptr, *preirqptr, *irqheadptr, *irqp; ulong_t iflag; mutex_enter(&airq_mutex); irqindex = IRQINDEX(irqno); irqptr = preirqptr = irqheadptr = apic_irq_table[irqindex]; DDI_INTR_IMPLDBG((CE_CONT, "apic_delspl: dip=0x%p type=%d irqno=0x%x " "vector=0x%x\n", (void *)irqptr->airq_dip, irqptr->airq_mps_intr_index, irqno, irqptr->airq_vector)); while (irqptr) { if (VIRTIRQ(irqindex, irqptr->airq_share_id) == irqno) break; preirqptr = irqptr; irqptr = irqptr->airq_next; } ASSERT(irqptr); irqptr->airq_share--; mutex_exit(&airq_mutex); /* * If there are more interrupts at a higher IPL, we don't need * to disable anything. */ if (ipl < max_ipl) return (PSM_SUCCESS); /* return if it is not hardware interrupt */ if (irqptr->airq_mps_intr_index == RESERVE_INDEX) return (PSM_SUCCESS); if (!apic_picinit_called) { /* * Clear irq_struct. If two devices shared an intpt * line & 1 unloaded before picinit, we are hosed. But, then * we hope the machine survive. */ irqptr->airq_mps_intr_index = FREE_INDEX; irqptr->airq_temp_cpu = IRQ_UNINIT; apic_free_vector(irqptr->airq_vector); return (PSM_SUCCESS); } /* * Downgrade vector to new max_ipl if needed. If we cannot allocate, * use old IPL. Not very elegant, but it should work. */ if ((irqptr->airq_ipl != max_ipl) && (max_ipl != PSM_INVALID_IPL) && !ioapic_mask_workaround[irqptr->airq_ioapicindex]) { apic_irq_t *irqp; if ((vector = apic_allocate_vector(max_ipl, irqno, 1))) { apic_mark_vector(irqheadptr->airq_vector, vector); irqp = irqheadptr; while (irqp) { irqp->airq_vector = vector; irqp->airq_ipl = (uchar_t)max_ipl; if (irqp->airq_temp_cpu != IRQ_UNINIT) { apic_record_rdt_entry(irqp, irqindex); iflag = intr_clear(); lock_set(&apic_ioapic_lock); (void) apic_setup_io_intr(irqp, irqindex, B_FALSE); lock_clear(&apic_ioapic_lock); intr_restore(iflag); } irqp = irqp->airq_next; } } } else if (irqptr->airq_ipl != max_ipl && max_ipl != PSM_INVALID_IPL && ioapic_mask_workaround[irqptr->airq_ioapicindex]) { /* * We cannot downgrade the IPL of the vector below the vector's * hardware priority. If we did, it would be possible for a * higher-priority hardware vector to interrupt a CPU running at an IPL * lower than the hardware priority of the interrupting vector (but * higher than the soft IPL of this IRQ). When this happens, we would * then try to drop the IPL BELOW what it was (effectively dropping * below base_spl) which would be potentially catastrophic. * * (e.g. Suppose the hardware vector associated with this IRQ is 0x40 * (hardware IPL of 4). Further assume that the old IPL of this IRQ * was 4, but the new IPL is 1. If we forced vector 0x40 to result in * an IPL of 1, it would be possible for the processor to be executing * at IPL 3 and for an interrupt to come in on vector 0x40, interrupting * the currently-executing ISR. When apic_intr_enter consults * apic_irqs[], it will return 1, bringing the IPL of the CPU down to 1 * so even though the processor was running at IPL 4, an IPL 1 * interrupt will have interrupted it, which must not happen)). * * Effectively, this means that the hardware priority corresponding to * the IRQ's IPL (in apic_ipls[]) cannot be lower than the vector's * hardware priority. * * (In the above example, then, after removal of the IPL 4 device's * interrupt handler, the new IPL will continue to be 4 because the * hardware priority that IPL 1 implies is lower than the hardware * priority of the vector used.) */ /* apic_ipls is indexed by vector, starting at APIC_BASE_VECT */ const int apic_ipls_index = irqptr->airq_vector - APIC_BASE_VECT; const int vect_inherent_hwpri = irqptr->airq_vector >> APIC_IPL_SHIFT; /* * If there are still devices using this IRQ, determine the * new ipl to use. */ if (irqptr->airq_share) { int vect_desired_hwpri, hwpri; ASSERT(max_ipl < MAXIPL); vect_desired_hwpri = apic_ipltopri[max_ipl] >> APIC_IPL_SHIFT; /* * If the desired IPL's hardware priority is lower * than that of the vector, use the hardware priority * of the vector to determine the new IPL. */ hwpri = (vect_desired_hwpri < vect_inherent_hwpri) ? vect_inherent_hwpri : vect_desired_hwpri; /* * Now, to get the right index for apic_vectortoipl, * we need to subtract APIC_BASE_VECT from the * hardware-vector-equivalent (in hwpri). Since hwpri * is already shifted, we shift APIC_BASE_VECT before * doing the subtraction. */ hwpri -= (APIC_BASE_VECT >> APIC_IPL_SHIFT); ASSERT(hwpri >= 0); ASSERT(hwpri < MAXIPL); max_ipl = apic_vectortoipl[hwpri]; apic_ipls[apic_ipls_index] = (uchar_t)max_ipl; irqp = irqheadptr; while (irqp) { irqp->airq_ipl = (uchar_t)max_ipl; irqp = irqp->airq_next; } } else { /* * No more devices on this IRQ, so reset this vector's * element in apic_ipls to the original IPL for this * vector */ apic_ipls[apic_ipls_index] = apic_vectortoipl[vect_inherent_hwpri]; } } /* * If there are still active interrupts, we are done. */ if (irqptr->airq_share) return (PSM_SUCCESS); iflag = intr_clear(); lock_set(&apic_ioapic_lock); if (irqptr->airq_mps_intr_index == MSI_INDEX) { /* * Disable the MSI vector * Make sure we only disable on the last * of the multi-MSI support */ if (i_ddi_intr_get_current_nenables(irqptr->airq_dip) == 1) { apic_pci_msi_disable_mode(irqptr->airq_dip, DDI_INTR_TYPE_MSI); } } else if (irqptr->airq_mps_intr_index == MSIX_INDEX) { /* * Disable the MSI-X vector * needs to clear its mask and addr/data for each MSI-X */ apic_pci_msi_unconfigure(irqptr->airq_dip, DDI_INTR_TYPE_MSIX, irqptr->airq_origirq); /* * Make sure we only disable on the last MSI-X */ if (i_ddi_intr_get_current_nenables(irqptr->airq_dip) == 1) { apic_pci_msi_disable_mode(irqptr->airq_dip, DDI_INTR_TYPE_MSIX); } } else { /* * The assumption here is that this is safe, even for * systems with IOAPICs that suffer from the hardware * erratum because all devices have been quiesced before * they unregister their interrupt handlers. If that * assumption turns out to be false, this mask operation * can induce the same erratum result we're trying to * avoid. */ ioapic_ix = irqptr->airq_ioapicindex; intin = irqptr->airq_intin_no; ioapic_write(ioapic_ix, APIC_RDT_CMD + 2 * intin, AV_MASK); } apic_vt_ops->apic_intrmap_free_entry(&irqptr->airq_intrmap_private); /* * This irq entry is the only one in the chain. */ if (irqheadptr->airq_next == NULL) { ASSERT(irqheadptr == irqptr); bind_cpu = irqptr->airq_temp_cpu; if (((uint32_t)bind_cpu != IRQ_UNBOUND) && ((uint32_t)bind_cpu != IRQ_UNINIT)) { ASSERT(apic_cpu_in_range(bind_cpu)); if (bind_cpu & IRQ_USER_BOUND) { /* If hardbound, temp_cpu == cpu */ bind_cpu &= ~IRQ_USER_BOUND; apic_cpus[bind_cpu].aci_bound--; } else apic_cpus[bind_cpu].aci_temp_bound--; } irqptr->airq_temp_cpu = IRQ_UNINIT; irqptr->airq_mps_intr_index = FREE_INDEX; lock_clear(&apic_ioapic_lock); intr_restore(iflag); apic_free_vector(irqptr->airq_vector); return (PSM_SUCCESS); } /* * If we get here, we are sharing the vector and there are more than * one active irq entries in the chain. */ lock_clear(&apic_ioapic_lock); intr_restore(iflag); mutex_enter(&airq_mutex); /* Remove the irq entry from the chain */ if (irqptr == irqheadptr) { /* The irq entry is at the head */ apic_irq_table[irqindex] = irqptr->airq_next; } else { preirqptr->airq_next = irqptr->airq_next; } /* Free the irq entry */ kmem_free(irqptr, sizeof (apic_irq_t)); mutex_exit(&airq_mutex); return (PSM_SUCCESS); } /* * apic_introp_xlate() replaces apic_translate_irq() and is * called only from apic_intr_ops(). With the new ADII framework, * the priority can no longer be retrieved through i_ddi_get_intrspec(). * It has to be passed in from the caller. * * Return value: * Success: irqno for the given device * Failure: -1 */ int apic_introp_xlate(dev_info_t *dip, struct intrspec *ispec, int type) { char dev_type[16]; int dev_len, pci_irq, newirq, bustype, devid, busid, i; int irqno = ispec->intrspec_vec; ddi_acc_handle_t cfg_handle; uchar_t ipin; struct apic_io_intr *intrp; iflag_t intr_flag; ACPI_SUBTABLE_HEADER *hp; ACPI_MADT_INTERRUPT_OVERRIDE *isop; apic_irq_t *airqp; int parent_is_pci_or_pciex = 0; int child_is_pciex = 0; DDI_INTR_IMPLDBG((CE_CONT, "apic_introp_xlate: dip=0x%p name=%s " "type=%d irqno=0x%x\n", (void *)dip, ddi_get_name(dip), type, irqno)); dev_len = sizeof (dev_type); if (ddi_getlongprop_buf(DDI_DEV_T_ANY, ddi_get_parent(dip), DDI_PROP_DONTPASS, "device_type", (caddr_t)dev_type, &dev_len) == DDI_PROP_SUCCESS) { if ((strcmp(dev_type, "pci") == 0) || (strcmp(dev_type, "pciex") == 0)) parent_is_pci_or_pciex = 1; } if (ddi_getlongprop_buf(DDI_DEV_T_ANY, dip, DDI_PROP_DONTPASS, "compatible", (caddr_t)dev_type, &dev_len) == DDI_PROP_SUCCESS) { if (strstr(dev_type, "pciex")) child_is_pciex = 1; } if (DDI_INTR_IS_MSI_OR_MSIX(type)) { if ((airqp = apic_find_irq(dip, ispec, type)) != NULL) { airqp->airq_iflag.bustype = child_is_pciex ? BUS_PCIE : BUS_PCI; return (apic_vector_to_irq[airqp->airq_vector]); } return (apic_setup_irq_table(dip, irqno, NULL, ispec, NULL, type)); } bustype = 0; /* check if we have already translated this irq */ mutex_enter(&airq_mutex); newirq = apic_min_device_irq; for (; newirq <= apic_max_device_irq; newirq++) { airqp = apic_irq_table[newirq]; while (airqp) { if ((airqp->airq_dip == dip) && (airqp->airq_origirq == irqno) && (airqp->airq_mps_intr_index != FREE_INDEX)) { mutex_exit(&airq_mutex); return (VIRTIRQ(newirq, airqp->airq_share_id)); } airqp = airqp->airq_next; } } mutex_exit(&airq_mutex); if (apic_defconf) goto defconf; if ((dip == NULL) || (!apic_irq_translate && !apic_enable_acpi)) goto nonpci; if (parent_is_pci_or_pciex) { /* pci device */ if (acpica_get_bdf(dip, &busid, &devid, NULL) != 0) goto nonpci; if (busid == 0 && apic_pci_bus_total == 1) busid = (int)apic_single_pci_busid; if (pci_config_setup(dip, &cfg_handle) != DDI_SUCCESS) return (-1); ipin = pci_config_get8(cfg_handle, PCI_CONF_IPIN) - PCI_INTA; pci_config_teardown(&cfg_handle); if (apic_enable_acpi && !apic_use_acpi_madt_only) { if (apic_acpi_translate_pci_irq(dip, busid, devid, ipin, &pci_irq, &intr_flag) != ACPI_PSM_SUCCESS) return (-1); intr_flag.bustype = child_is_pciex ? BUS_PCIE : BUS_PCI; return (apic_setup_irq_table(dip, pci_irq, NULL, ispec, &intr_flag, type)); } else { pci_irq = ((devid & 0x1f) << 2) | (ipin & 0x3); if ((intrp = apic_find_io_intr_w_busid(pci_irq, busid)) == NULL) { if ((pci_irq = apic_handle_pci_pci_bridge(dip, devid, ipin, &intrp)) == -1) return (-1); } return (apic_setup_irq_table(dip, pci_irq, intrp, ispec, NULL, type)); } } else if (strcmp(dev_type, "isa") == 0) bustype = BUS_ISA; else if (strcmp(dev_type, "eisa") == 0) bustype = BUS_EISA; nonpci: if (apic_enable_acpi && !apic_use_acpi_madt_only) { /* search iso entries first */ if (acpi_iso_cnt != 0) { hp = (ACPI_SUBTABLE_HEADER *)acpi_isop; i = 0; while (i < acpi_iso_cnt) { if (hp->Type == ACPI_MADT_TYPE_INTERRUPT_OVERRIDE) { isop = (ACPI_MADT_INTERRUPT_OVERRIDE *) hp; if (isop->Bus == 0 && isop->SourceIrq == irqno) { newirq = isop->GlobalIrq; intr_flag.intr_po = isop->IntiFlags & ACPI_MADT_POLARITY_MASK; intr_flag.intr_el = (isop->IntiFlags & ACPI_MADT_TRIGGER_MASK) >> 2; intr_flag.bustype = BUS_ISA; return (apic_setup_irq_table( dip, newirq, NULL, ispec, &intr_flag, type)); } i++; } hp = (ACPI_SUBTABLE_HEADER *)(((char *)hp) + hp->Length); } } intr_flag.intr_po = INTR_PO_ACTIVE_HIGH; intr_flag.intr_el = INTR_EL_EDGE; intr_flag.bustype = BUS_ISA; return (apic_setup_irq_table(dip, irqno, NULL, ispec, &intr_flag, type)); } else { if (bustype == 0) /* not initialized */ bustype = eisa_level_intr_mask ? BUS_EISA : BUS_ISA; for (i = 0; i < 2; i++) { if (((busid = apic_find_bus_id(bustype)) != -1) && ((intrp = apic_find_io_intr_w_busid(irqno, busid)) != NULL)) { if ((newirq = apic_setup_irq_table(dip, irqno, intrp, ispec, NULL, type)) != -1) { return (newirq); } goto defconf; } bustype = (bustype == BUS_EISA) ? BUS_ISA : BUS_EISA; } } /* MPS default configuration */ defconf: newirq = apic_setup_irq_table(dip, irqno, NULL, ispec, NULL, type); if (newirq == -1) return (-1); ASSERT(IRQINDEX(newirq) == irqno); ASSERT(apic_irq_table[irqno]); return (newirq); } /* * Attempt to share vector with someone else */ static int apic_share_vector(int irqno, iflag_t *intr_flagp, short intr_index, int ipl, uchar_t ioapicindex, uchar_t ipin, apic_irq_t **irqptrp) { #ifdef DEBUG apic_irq_t *tmpirqp = NULL; #endif /* DEBUG */ apic_irq_t *irqptr, dummyirq; int newirq, chosen_irq = -1, share = 127; int lowest, highest, i; uchar_t share_id; DDI_INTR_IMPLDBG((CE_CONT, "apic_share_vector: irqno=0x%x " "intr_index=0x%x ipl=0x%x\n", irqno, intr_index, ipl)); highest = apic_ipltopri[ipl] + APIC_VECTOR_MASK; lowest = apic_ipltopri[ipl-1] + APIC_VECTOR_PER_IPL; if (highest < lowest) /* Both ipl and ipl-1 map to same pri */ lowest -= APIC_VECTOR_PER_IPL; dummyirq.airq_mps_intr_index = intr_index; dummyirq.airq_ioapicindex = ioapicindex; dummyirq.airq_intin_no = ipin; if (intr_flagp) dummyirq.airq_iflag = *intr_flagp; apic_record_rdt_entry(&dummyirq, irqno); for (i = lowest; i <= highest; i++) { newirq = apic_vector_to_irq[i]; if (newirq == APIC_RESV_IRQ) continue; irqptr = apic_irq_table[newirq]; if ((dummyirq.airq_rdt_entry & 0xFF00) != (irqptr->airq_rdt_entry & 0xFF00)) /* not compatible */ continue; if (irqptr->airq_share < share) { share = irqptr->airq_share; chosen_irq = newirq; } } if (chosen_irq != -1) { /* * Assign a share id which is free or which is larger * than the largest one. */ share_id = 1; mutex_enter(&airq_mutex); irqptr = apic_irq_table[chosen_irq]; while (irqptr) { if (irqptr->airq_mps_intr_index == FREE_INDEX) { share_id = irqptr->airq_share_id; break; } if (share_id <= irqptr->airq_share_id) share_id = irqptr->airq_share_id + 1; #ifdef DEBUG tmpirqp = irqptr; #endif /* DEBUG */ irqptr = irqptr->airq_next; } if (!irqptr) { irqptr = kmem_zalloc(sizeof (apic_irq_t), KM_SLEEP); irqptr->airq_temp_cpu = IRQ_UNINIT; irqptr->airq_next = apic_irq_table[chosen_irq]->airq_next; apic_irq_table[chosen_irq]->airq_next = irqptr; #ifdef DEBUG tmpirqp = apic_irq_table[chosen_irq]; #endif /* DEBUG */ } irqptr->airq_mps_intr_index = intr_index; irqptr->airq_ioapicindex = ioapicindex; irqptr->airq_intin_no = ipin; if (intr_flagp) irqptr->airq_iflag = *intr_flagp; irqptr->airq_vector = apic_irq_table[chosen_irq]->airq_vector; irqptr->airq_share_id = share_id; apic_record_rdt_entry(irqptr, irqno); *irqptrp = irqptr; #ifdef DEBUG /* shuffle the pointers to test apic_delspl path */ if (tmpirqp) { tmpirqp->airq_next = irqptr->airq_next; irqptr->airq_next = apic_irq_table[chosen_irq]; apic_irq_table[chosen_irq] = irqptr; } #endif /* DEBUG */ mutex_exit(&airq_mutex); return (VIRTIRQ(chosen_irq, share_id)); } return (-1); } /* * Allocate/Initialize the apic_irq_table[] entry for given irqno. If the entry * is used already, we will try to allocate a new irqno. * * Return value: * Success: irqno * Failure: -1 */ static int apic_setup_irq_table(dev_info_t *dip, int irqno, struct apic_io_intr *intrp, struct intrspec *ispec, iflag_t *intr_flagp, int type) { int origirq; uchar_t ipl; int newirq, intr_index; uchar_t ipin, ioapic, ioapicindex, vector; apic_irq_t *irqptr; major_t major; dev_info_t *sdip; ASSERT(ispec != NULL); origirq = ispec->intrspec_vec; ipl = ispec->intrspec_pri; DDI_INTR_IMPLDBG((CE_CONT, "apic_setup_irq_table: dip=0x%p type=%d " "irqno=0x%x origirq=0x%x\n", (void *)dip, type, irqno, origirq)); major = (dip != NULL) ? ddi_driver_major(dip) : 0; if (DDI_INTR_IS_MSI_OR_MSIX(type)) { /* MSI/X doesn't need to setup ioapic stuffs */ ioapicindex = 0xff; ioapic = 0xff; ipin = (uchar_t)0xff; intr_index = (type == DDI_INTR_TYPE_MSI) ? MSI_INDEX : MSIX_INDEX; mutex_enter(&airq_mutex); if ((irqno = apic_allocate_irq(apic_first_avail_irq)) == -1) { mutex_exit(&airq_mutex); /* need an irq for MSI/X to index into autovect[] */ cmn_err(CE_WARN, "No interrupt irq: %s instance %d", ddi_get_name(dip), ddi_get_instance(dip)); return (-1); } mutex_exit(&airq_mutex); } else if (intrp != NULL) { intr_index = (int)(intrp - apic_io_intrp); ioapic = intrp->intr_destid; ipin = intrp->intr_destintin; /* Find ioapicindex. If destid was ALL, we will exit with 0. */ for (ioapicindex = apic_io_max - 1; ioapicindex; ioapicindex--) if (apic_io_id[ioapicindex] == ioapic) break; ASSERT((ioapic == apic_io_id[ioapicindex]) || (ioapic == INTR_ALL_APIC)); /* check whether this intin# has been used by another irqno */ if ((newirq = apic_find_intin(ioapicindex, ipin)) != -1) { return (newirq); } } else if (intr_flagp != NULL) { /* ACPI case */ intr_index = ACPI_INDEX; ioapicindex = acpi_find_ioapic(irqno); ASSERT(ioapicindex != 0xFF); ioapic = apic_io_id[ioapicindex]; ipin = irqno - apic_io_vectbase[ioapicindex]; if (apic_irq_table[irqno] && apic_irq_table[irqno]->airq_mps_intr_index == ACPI_INDEX) { ASSERT(apic_irq_table[irqno]->airq_intin_no == ipin && apic_irq_table[irqno]->airq_ioapicindex == ioapicindex); return (irqno); } } else { /* default configuration */ ioapicindex = 0; ioapic = apic_io_id[ioapicindex]; ipin = (uchar_t)irqno; intr_index = DEFAULT_INDEX; } if ((vector = apic_allocate_vector(ipl, irqno, 0)) == 0) { if ((newirq = apic_share_vector(irqno, intr_flagp, intr_index, ipl, ioapicindex, ipin, &irqptr)) != -1) { irqptr->airq_ipl = ipl; irqptr->airq_origirq = (uchar_t)origirq; irqptr->airq_dip = dip; irqptr->airq_major = major; sdip = apic_irq_table[IRQINDEX(newirq)]->airq_dip; /* This is OK to do really */ if (sdip == NULL) { cmn_err(CE_WARN, "Sharing vectors: %s" " instance %d and SCI", ddi_get_name(dip), ddi_get_instance(dip)); } else { cmn_err(CE_WARN, "Sharing vectors: %s" " instance %d and %s instance %d", ddi_get_name(sdip), ddi_get_instance(sdip), ddi_get_name(dip), ddi_get_instance(dip)); } return (newirq); } /* try high priority allocation now that share has failed */ if ((vector = apic_allocate_vector(ipl, irqno, 1)) == 0) { cmn_err(CE_WARN, "No interrupt vector: %s instance %d", ddi_get_name(dip), ddi_get_instance(dip)); return (-1); } } mutex_enter(&airq_mutex); if (apic_irq_table[irqno] == NULL) { irqptr = kmem_zalloc(sizeof (apic_irq_t), KM_SLEEP); irqptr->airq_temp_cpu = IRQ_UNINIT; apic_irq_table[irqno] = irqptr; } else { irqptr = apic_irq_table[irqno]; if (irqptr->airq_mps_intr_index != FREE_INDEX) { /* * The slot is used by another irqno, so allocate * a free irqno for this interrupt */ newirq = apic_allocate_irq(apic_first_avail_irq); if (newirq == -1) { mutex_exit(&airq_mutex); return (-1); } irqno = newirq; irqptr = apic_irq_table[irqno]; if (irqptr == NULL) { irqptr = kmem_zalloc(sizeof (apic_irq_t), KM_SLEEP); irqptr->airq_temp_cpu = IRQ_UNINIT; apic_irq_table[irqno] = irqptr; } vector = apic_modify_vector(vector, newirq); } } apic_max_device_irq = max(irqno, apic_max_device_irq); apic_min_device_irq = min(irqno, apic_min_device_irq); mutex_exit(&airq_mutex); irqptr->airq_ioapicindex = ioapicindex; irqptr->airq_intin_no = ipin; irqptr->airq_ipl = ipl; irqptr->airq_vector = vector; irqptr->airq_origirq = (uchar_t)origirq; irqptr->airq_share_id = 0; irqptr->airq_mps_intr_index = (short)intr_index; irqptr->airq_dip = dip; irqptr->airq_major = major; irqptr->airq_cpu = apic_bind_intr(dip, irqno, ioapic, ipin); if (intr_flagp) irqptr->airq_iflag = *intr_flagp; if (!DDI_INTR_IS_MSI_OR_MSIX(type)) { /* setup I/O APIC entry for non-MSI/X interrupts */ apic_record_rdt_entry(irqptr, irqno); } return (irqno); } /* * return the cpu to which this intr should be bound. * Check properties or any other mechanism to see if user wants it * bound to a specific CPU. If so, return the cpu id with high bit set. * If not, use the policy to choose a cpu and return the id. */ uint32_t apic_bind_intr(dev_info_t *dip, int irq, uchar_t ioapicid, uchar_t intin) { int instance, instno, prop_len, bind_cpu, count; uint_t i, rc; uint32_t cpu; major_t major; char *name, *drv_name, *prop_val, *cptr; char prop_name[32]; ulong_t iflag; if (apic_intr_policy == INTR_LOWEST_PRIORITY) return (IRQ_UNBOUND); if (apic_nproc == 1) return (0); /* * dip may be NULL for interrupts not associated with a device driver, * such as the ACPI SCI or HPET interrupts. In that case just use the * next CPU and return. */ if (dip == NULL) { iflag = intr_clear(); lock_set(&apic_ioapic_lock); bind_cpu = apic_get_next_bind_cpu(); lock_clear(&apic_ioapic_lock); intr_restore(iflag); cmn_err(CE_CONT, "!%s: irq 0x%x " "vector 0x%x ioapic 0x%x intin 0x%x is bound to cpu %d\n", psm_name, irq, apic_irq_table[irq]->airq_vector, ioapicid, intin, bind_cpu & ~IRQ_USER_BOUND); return ((uint32_t)bind_cpu); } name = ddi_get_name(dip); major = ddi_name_to_major(name); drv_name = ddi_major_to_name(major); instance = ddi_get_instance(dip); if (apic_intr_policy == INTR_ROUND_ROBIN_WITH_AFFINITY) { i = apic_min_device_irq; for (; i <= apic_max_device_irq; i++) { if ((i == irq) || (apic_irq_table[i] == NULL) || (apic_irq_table[i]->airq_mps_intr_index == FREE_INDEX)) continue; if ((apic_irq_table[i]->airq_major == major) && (!(apic_irq_table[i]->airq_cpu & IRQ_USER_BOUND))) { cpu = apic_irq_table[i]->airq_cpu; cmn_err(CE_CONT, "!%s: %s (%s) instance #%d " "irq 0x%x vector 0x%x ioapic 0x%x " "intin 0x%x is bound to cpu %d\n", psm_name, name, drv_name, instance, irq, apic_irq_table[irq]->airq_vector, ioapicid, intin, cpu); return (cpu); } } } /* * search for "drvname"_intpt_bind_cpus property first, the * syntax of the property should be "a[,b,c,...]" where * instance 0 binds to cpu a, instance 1 binds to cpu b, * instance 3 binds to cpu c... * ddi_getlongprop() will search /option first, then / * if "drvname"_intpt_bind_cpus doesn't exist, then find * intpt_bind_cpus property. The syntax is the same, and * it applies to all the devices if its "drvname" specific * property doesn't exist */ (void) strcpy(prop_name, drv_name); (void) strcat(prop_name, "_intpt_bind_cpus"); rc = ddi_getlongprop(DDI_DEV_T_ANY, dip, 0, prop_name, (caddr_t)&prop_val, &prop_len); if (rc != DDI_PROP_SUCCESS) { rc = ddi_getlongprop(DDI_DEV_T_ANY, dip, 0, "intpt_bind_cpus", (caddr_t)&prop_val, &prop_len); } if (rc == DDI_PROP_SUCCESS) { for (i = count = 0; i < (prop_len - 1); i++) if (prop_val[i] == ',') count++; if (prop_val[i-1] != ',') count++; /* * if somehow the binding instances defined in the * property are not enough for this instno., then * reuse the pattern for the next instance until * it reaches the requested instno */ instno = instance % count; i = 0; cptr = prop_val; while (i < instno) if (*cptr++ == ',') i++; bind_cpu = stoi(&cptr); kmem_free(prop_val, prop_len); /* if specific CPU is bogus, then default to next cpu */ if (!apic_cpu_in_range(bind_cpu)) { cmn_err(CE_WARN, "%s: %s=%s: CPU %d not present", psm_name, prop_name, prop_val, bind_cpu); rc = DDI_PROP_NOT_FOUND; } else { /* indicate that we are bound at user request */ bind_cpu |= IRQ_USER_BOUND; } /* * no need to check apic_cpus[].aci_status, if specific CPU is * not up, then post_cpu_start will handle it. */ } if (rc != DDI_PROP_SUCCESS) { iflag = intr_clear(); lock_set(&apic_ioapic_lock); bind_cpu = apic_get_next_bind_cpu(); lock_clear(&apic_ioapic_lock); intr_restore(iflag); } cmn_err(CE_CONT, "!%s: %s (%s) instance %d irq 0x%x " "vector 0x%x ioapic 0x%x intin 0x%x is bound to cpu %d\n", psm_name, name, drv_name, instance, irq, apic_irq_table[irq]->airq_vector, ioapicid, intin, bind_cpu & ~IRQ_USER_BOUND); return ((uint32_t)bind_cpu); } /* * Mark vector as being in the process of being deleted. Interrupts * may still come in on some CPU. The moment an interrupt comes with * the new vector, we know we can free the old one. Called only from * addspl and delspl with interrupts disabled. Because an interrupt * can be shared, but no interrupt from either device may come in, * we also use a timeout mechanism, which we arbitrarily set to * apic_revector_timeout microseconds. */ static void apic_mark_vector(uchar_t oldvector, uchar_t newvector) { ulong_t iflag; iflag = intr_clear(); lock_set(&apic_revector_lock); if (!apic_oldvec_to_newvec) { apic_oldvec_to_newvec = kmem_zalloc(sizeof (newvector) * APIC_MAX_VECTOR * 2, KM_NOSLEEP); if (!apic_oldvec_to_newvec) { /* * This failure is not catastrophic. * But, the oldvec will never be freed. */ apic_error |= APIC_ERR_MARK_VECTOR_FAIL; lock_clear(&apic_revector_lock); intr_restore(iflag); return; } apic_newvec_to_oldvec = &apic_oldvec_to_newvec[APIC_MAX_VECTOR]; } /* See if we already did this for drivers which do double addintrs */ if (apic_oldvec_to_newvec[oldvector] != newvector) { apic_oldvec_to_newvec[oldvector] = newvector; apic_newvec_to_oldvec[newvector] = oldvector; apic_revector_pending++; } lock_clear(&apic_revector_lock); intr_restore(iflag); (void) timeout(apic_xlate_vector_free_timeout_handler, (void *)(uintptr_t)oldvector, drv_usectohz(apic_revector_timeout)); } /* * xlate_vector is called from intr_enter if revector_pending is set. * It will xlate it if needed and mark the old vector as free. */ uchar_t apic_xlate_vector(uchar_t vector) { uchar_t newvector, oldvector = 0; lock_set(&apic_revector_lock); /* Do we really need to do this ? */ if (!apic_revector_pending) { lock_clear(&apic_revector_lock); return (vector); } if ((newvector = apic_oldvec_to_newvec[vector]) != 0) oldvector = vector; else { /* * The incoming vector is new . See if a stale entry is * remaining */ if ((oldvector = apic_newvec_to_oldvec[vector]) != 0) newvector = vector; } if (oldvector) { apic_revector_pending--; apic_oldvec_to_newvec[oldvector] = 0; apic_newvec_to_oldvec[newvector] = 0; apic_free_vector(oldvector); lock_clear(&apic_revector_lock); /* There could have been more than one reprogramming! */ return (apic_xlate_vector(newvector)); } lock_clear(&apic_revector_lock); return (vector); } void apic_xlate_vector_free_timeout_handler(void *arg) { ulong_t iflag; uchar_t oldvector, newvector; oldvector = (uchar_t)(uintptr_t)arg; iflag = intr_clear(); lock_set(&apic_revector_lock); if ((newvector = apic_oldvec_to_newvec[oldvector]) != 0) { apic_free_vector(oldvector); apic_oldvec_to_newvec[oldvector] = 0; apic_newvec_to_oldvec[newvector] = 0; apic_revector_pending--; } lock_clear(&apic_revector_lock); intr_restore(iflag); } /* * Bind interrupt corresponding to irq_ptr to bind_cpu. * Must be called with interrupts disabled and apic_ioapic_lock held */ int apic_rebind(apic_irq_t *irq_ptr, int bind_cpu, struct ioapic_reprogram_data *drep) { int ioapicindex, intin_no; uint32_t airq_temp_cpu; apic_cpus_info_t *cpu_infop; uint32_t rdt_entry; int which_irq; ioapic_rdt_t irdt; which_irq = apic_vector_to_irq[irq_ptr->airq_vector]; intin_no = irq_ptr->airq_intin_no; ioapicindex = irq_ptr->airq_ioapicindex; airq_temp_cpu = irq_ptr->airq_temp_cpu; if (airq_temp_cpu != IRQ_UNINIT && airq_temp_cpu != IRQ_UNBOUND) { if (airq_temp_cpu & IRQ_USER_BOUND) /* Mask off high bit so it can be used as array index */ airq_temp_cpu &= ~IRQ_USER_BOUND; ASSERT(apic_cpu_in_range(airq_temp_cpu)); } /* * Can't bind to a CPU that's not accepting interrupts: */ cpu_infop = &apic_cpus[bind_cpu & ~IRQ_USER_BOUND]; if (!(cpu_infop->aci_status & APIC_CPU_INTR_ENABLE)) return (1); /* * If we are about to change the interrupt vector for this interrupt, * and this interrupt is level-triggered, attached to an IOAPIC, * has been delivered to a CPU and that CPU has not handled it * yet, we cannot reprogram the IOAPIC now. */ if (!APIC_IS_MSI_OR_MSIX_INDEX(irq_ptr->airq_mps_intr_index)) { rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapicindex, intin_no); if ((irq_ptr->airq_vector != RDT_VECTOR(rdt_entry)) && apic_check_stuck_interrupt(irq_ptr, airq_temp_cpu, bind_cpu, ioapicindex, intin_no, which_irq, drep) != 0) { return (0); } /* * NOTE: We do not unmask the RDT here, as an interrupt MAY * still come in before we have a chance to reprogram it below. * The reprogramming below will simultaneously change and * unmask the RDT entry. */ if ((uint32_t)bind_cpu == IRQ_UNBOUND) { irdt.ir_lo = AV_LDEST | AV_LOPRI | irq_ptr->airq_rdt_entry; irdt.ir_hi = AV_TOALL >> APIC_ID_BIT_OFFSET; apic_vt_ops->apic_intrmap_alloc_entry( &irq_ptr->airq_intrmap_private, NULL, DDI_INTR_TYPE_FIXED, 1, ioapicindex); apic_vt_ops->apic_intrmap_map_entry( irq_ptr->airq_intrmap_private, (void *)&irdt, DDI_INTR_TYPE_FIXED, 1); apic_vt_ops->apic_intrmap_record_rdt( irq_ptr->airq_intrmap_private, &irdt); /* Write the RDT entry -- no specific CPU binding */ WRITE_IOAPIC_RDT_ENTRY_HIGH_DWORD(ioapicindex, intin_no, irdt.ir_hi | AV_TOALL); if (airq_temp_cpu != IRQ_UNINIT && airq_temp_cpu != IRQ_UNBOUND) apic_cpus[airq_temp_cpu].aci_temp_bound--; /* * Write the vector, trigger, and polarity portion of * the RDT */ WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapicindex, intin_no, irdt.ir_lo); irq_ptr->airq_temp_cpu = IRQ_UNBOUND; return (0); } } if (bind_cpu & IRQ_USER_BOUND) { cpu_infop->aci_bound++; } else { cpu_infop->aci_temp_bound++; } ASSERT(apic_cpu_in_range(bind_cpu)); if ((airq_temp_cpu != IRQ_UNBOUND) && (airq_temp_cpu != IRQ_UNINIT)) { apic_cpus[airq_temp_cpu].aci_temp_bound--; } if (!APIC_IS_MSI_OR_MSIX_INDEX(irq_ptr->airq_mps_intr_index)) { irdt.ir_lo = AV_PDEST | AV_FIXED | irq_ptr->airq_rdt_entry; irdt.ir_hi = cpu_infop->aci_local_id; apic_vt_ops->apic_intrmap_alloc_entry( &irq_ptr->airq_intrmap_private, NULL, DDI_INTR_TYPE_FIXED, 1, ioapicindex); apic_vt_ops->apic_intrmap_map_entry( irq_ptr->airq_intrmap_private, (void *)&irdt, DDI_INTR_TYPE_FIXED, 1); apic_vt_ops->apic_intrmap_record_rdt( irq_ptr->airq_intrmap_private, &irdt); /* Write the RDT entry -- bind to a specific CPU: */ WRITE_IOAPIC_RDT_ENTRY_HIGH_DWORD(ioapicindex, intin_no, irdt.ir_hi); /* Write the vector, trigger, and polarity portion of the RDT */ WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapicindex, intin_no, irdt.ir_lo); } else { int type = (irq_ptr->airq_mps_intr_index == MSI_INDEX) ? DDI_INTR_TYPE_MSI : DDI_INTR_TYPE_MSIX; if (type == DDI_INTR_TYPE_MSI) { if (irq_ptr->airq_ioapicindex == irq_ptr->airq_origirq) { /* first one */ DDI_INTR_IMPLDBG((CE_CONT, "apic_rebind: call " "apic_pci_msi_enable_vector\n")); apic_pci_msi_enable_vector(irq_ptr, type, which_irq, irq_ptr->airq_vector, irq_ptr->airq_intin_no, cpu_infop->aci_local_id); } if ((irq_ptr->airq_ioapicindex + irq_ptr->airq_intin_no - 1) == irq_ptr->airq_origirq) { /* last one */ DDI_INTR_IMPLDBG((CE_CONT, "apic_rebind: call " "apic_pci_msi_enable_mode\n")); apic_pci_msi_enable_mode(irq_ptr->airq_dip, type, which_irq); } } else { /* MSI-X */ apic_pci_msi_enable_vector(irq_ptr, type, irq_ptr->airq_origirq, irq_ptr->airq_vector, 1, cpu_infop->aci_local_id); apic_pci_msi_enable_mode(irq_ptr->airq_dip, type, irq_ptr->airq_origirq); } } irq_ptr->airq_temp_cpu = (uint32_t)bind_cpu; apic_redist_cpu_skip &= ~(1 << (bind_cpu & ~IRQ_USER_BOUND)); return (0); } static void apic_last_ditch_clear_remote_irr(int ioapic_ix, int intin_no) { if ((READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no) & AV_REMOTE_IRR) != 0) { /* * Trying to clear the bit through normal * channels has failed. So as a last-ditch * effort, try to set the trigger mode to * edge, then to level. This has been * observed to work on many systems. */ WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no, READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no) & ~AV_LEVEL); WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no, READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no) | AV_LEVEL); /* * If the bit's STILL set, this interrupt may * be hosed. */ if ((READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no) & AV_REMOTE_IRR) != 0) { prom_printf("%s: Remote IRR still " "not clear for IOAPIC %d intin %d.\n" "\tInterrupts to this pin may cease " "functioning.\n", psm_name, ioapic_ix, intin_no); #ifdef DEBUG apic_last_ditch_reprogram_failures++; #endif } } } /* * This function is protected by apic_ioapic_lock coupled with the * fact that interrupts are disabled. */ static void delete_defer_repro_ent(int which_irq) { ASSERT(which_irq >= 0); ASSERT(which_irq <= 255); ASSERT(LOCK_HELD(&apic_ioapic_lock)); if (apic_reprogram_info[which_irq].done) return; apic_reprogram_info[which_irq].done = B_TRUE; #ifdef DEBUG apic_defer_repro_total_retries += apic_reprogram_info[which_irq].tries; apic_defer_repro_successes++; #endif if (--apic_reprogram_outstanding == 0) { setlvlx = psm_intr_exit_fn(); } } /* * Interrupts must be disabled during this function to prevent * self-deadlock. Interrupts are disabled because this function * is called from apic_check_stuck_interrupt(), which is called * from apic_rebind(), which requires its caller to disable interrupts. */ static void add_defer_repro_ent(apic_irq_t *irq_ptr, int which_irq, int new_bind_cpu) { ASSERT(which_irq >= 0); ASSERT(which_irq <= 255); ASSERT(!interrupts_enabled()); /* * On the off-chance that there's already a deferred * reprogramming on this irq, check, and if so, just update the * CPU and irq pointer to which the interrupt is targeted, then return. */ if (!apic_reprogram_info[which_irq].done) { apic_reprogram_info[which_irq].bindcpu = new_bind_cpu; apic_reprogram_info[which_irq].irqp = irq_ptr; return; } apic_reprogram_info[which_irq].irqp = irq_ptr; apic_reprogram_info[which_irq].bindcpu = new_bind_cpu; apic_reprogram_info[which_irq].tries = 0; /* * This must be the last thing set, since we're not * grabbing any locks, apic_try_deferred_reprogram() will * make its decision about using this entry iff done * is false. */ apic_reprogram_info[which_irq].done = B_FALSE; /* * If there were previously no deferred reprogrammings, change * setlvlx to call apic_try_deferred_reprogram() */ if (++apic_reprogram_outstanding == 1) { setlvlx = apic_try_deferred_reprogram; } } static void apic_try_deferred_reprogram(int prev_ipl, int irq) { int reproirq; ulong_t iflag; struct ioapic_reprogram_data *drep; (*psm_intr_exit_fn())(prev_ipl, irq); if (!lock_try(&apic_defer_reprogram_lock)) { return; } /* * Acquire the apic_ioapic_lock so that any other operations that * may affect the apic_reprogram_info state are serialized. * It's still possible for the last deferred reprogramming to clear * between the time we entered this function and the time we get to * the for loop below. In that case, *setlvlx will have been set * back to *_intr_exit and drep will be NULL. (There's no way to * stop that from happening -- we would need to grab a lock before * calling *setlvlx, which is neither realistic nor prudent). */ iflag = intr_clear(); lock_set(&apic_ioapic_lock); /* * For each deferred RDT entry, try to reprogram it now. Note that * there is no lock acquisition to read apic_reprogram_info because * '.done' is set only after the other fields in the structure are set. */ drep = NULL; for (reproirq = 0; reproirq <= APIC_MAX_VECTOR; reproirq++) { if (apic_reprogram_info[reproirq].done == B_FALSE) { drep = &apic_reprogram_info[reproirq]; break; } } /* * Either we found a deferred action to perform, or * we entered this function spuriously, after *setlvlx * was restored to point to *_intr_exit. Any other * permutation is invalid. */ ASSERT(drep != NULL || *setlvlx == psm_intr_exit_fn()); /* * Though we can't really do anything about errors * at this point, keep track of them for reporting. * Note that it is very possible for apic_setup_io_intr * to re-register this very timeout if the Remote IRR bit * has not yet cleared. */ #ifdef DEBUG if (drep != NULL) { if (apic_setup_io_intr(drep, reproirq, B_TRUE) != 0) { apic_deferred_setup_failures++; } } else { apic_deferred_spurious_enters++; } #else if (drep != NULL) (void) apic_setup_io_intr(drep, reproirq, B_TRUE); #endif lock_clear(&apic_ioapic_lock); intr_restore(iflag); lock_clear(&apic_defer_reprogram_lock); } static void apic_ioapic_wait_pending_clear(int ioapic_ix, int intin_no) { int waited; /* * Wait for the delivery pending bit to clear. */ if ((READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no) & (AV_LEVEL|AV_PENDING)) == (AV_LEVEL|AV_PENDING)) { /* * If we're still waiting on the delivery of this interrupt, * continue to wait here until it is delivered (this should be * a very small amount of time, but include a timeout just in * case). */ for (waited = 0; waited < apic_max_reps_clear_pending; waited++) { if ((READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no) & AV_PENDING) == 0) { break; } } } } /* * Checks to see if the IOAPIC interrupt entry specified has its Remote IRR * bit set. Calls functions that modify the function that setlvlx points to, * so that the reprogramming can be retried very shortly. * * This function will mask the RDT entry if the interrupt is level-triggered. * (The caller is responsible for unmasking the RDT entry.) * * Returns non-zero if the caller should defer IOAPIC reprogramming. */ static int apic_check_stuck_interrupt(apic_irq_t *irq_ptr, int old_bind_cpu, int new_bind_cpu, int ioapic_ix, int intin_no, int which_irq, struct ioapic_reprogram_data *drep) { int32_t rdt_entry; int waited; int reps = 0; /* * Wait for the delivery pending bit to clear. */ do { ++reps; apic_ioapic_wait_pending_clear(ioapic_ix, intin_no); /* * Mask the RDT entry, but only if it's a level-triggered * interrupt */ rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no); if ((rdt_entry & (AV_LEVEL|AV_MASK)) == AV_LEVEL) { /* Mask it */ WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no, AV_MASK | rdt_entry); } if ((rdt_entry & AV_LEVEL) == AV_LEVEL) { /* * If there was a race and an interrupt was injected * just before we masked, check for that case here. * Then, unmask the RDT entry and try again. If we're * on our last try, don't unmask (because we want the * RDT entry to remain masked for the rest of the * function). */ rdt_entry = READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no); if ((rdt_entry & AV_PENDING) && (reps < apic_max_reps_clear_pending)) { /* Unmask it */ WRITE_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no, rdt_entry & ~AV_MASK); } } } while ((rdt_entry & AV_PENDING) && (reps < apic_max_reps_clear_pending)); #ifdef DEBUG if (rdt_entry & AV_PENDING) apic_intr_deliver_timeouts++; #endif /* * If the remote IRR bit is set, then the interrupt has been sent * to a CPU for processing. We have no choice but to wait for * that CPU to process the interrupt, at which point the remote IRR * bit will be cleared. */ if ((READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no) & (AV_LEVEL|AV_REMOTE_IRR)) == (AV_LEVEL|AV_REMOTE_IRR)) { /* * If the CPU that this RDT is bound to is NOT the current * CPU, wait until that CPU handles the interrupt and ACKs * it. If this interrupt is not bound to any CPU (that is, * if it's bound to the logical destination of "anyone"), it * may have been delivered to the current CPU so handle that * case by deferring the reprogramming (below). */ if ((old_bind_cpu != IRQ_UNBOUND) && (old_bind_cpu != IRQ_UNINIT) && (old_bind_cpu != psm_get_cpu_id())) { for (waited = 0; waited < apic_max_reps_clear_pending; waited++) { if ((READ_IOAPIC_RDT_ENTRY_LOW_DWORD(ioapic_ix, intin_no) & AV_REMOTE_IRR) == 0) { delete_defer_repro_ent(which_irq); /* Remote IRR has cleared! */ return (0); } } } /* * If we waited and the Remote IRR bit is still not cleared, * AND if we've invoked the timeout APIC_REPROGRAM_MAX_TIMEOUTS * times for this interrupt, try the last-ditch workaround: */ if (drep && drep->tries >= APIC_REPROGRAM_MAX_TRIES) { apic_last_ditch_clear_remote_irr(ioapic_ix, intin_no); /* Mark this one as reprogrammed: */ delete_defer_repro_ent(which_irq); return (0); } else { #ifdef DEBUG apic_intr_deferrals++; #endif /* * If waiting for the Remote IRR bit (above) didn't * allow it to clear, defer the reprogramming. * Add a new deferred-programming entry if the * caller passed a NULL one (and update the existing one * in case anything changed). */ add_defer_repro_ent(irq_ptr, which_irq, new_bind_cpu); if (drep) drep->tries++; /* Inform caller to defer IOAPIC programming: */ return (1); } } /* Remote IRR is clear */ delete_defer_repro_ent(which_irq); return (0); } /* * Called to migrate all interrupts at an irq to another cpu. * Must be called with interrupts disabled and apic_ioapic_lock held */ int apic_rebind_all(apic_irq_t *irq_ptr, int bind_cpu) { apic_irq_t *irqptr = irq_ptr; int retval = 0; while (irqptr) { if (irqptr->airq_temp_cpu != IRQ_UNINIT) retval |= apic_rebind(irqptr, bind_cpu, NULL); irqptr = irqptr->airq_next; } return (retval); } /* * apic_intr_redistribute does all the messy computations for identifying * which interrupt to move to which CPU. Currently we do just one interrupt * at a time. This reduces the time we spent doing all this within clock * interrupt. When it is done in idle, we could do more than 1. * First we find the most busy and the most free CPU (time in ISR only) * skipping those CPUs that has been identified as being ineligible (cpu_skip) * Then we look for IRQs which are closest to the difference between the * most busy CPU and the average ISR load. We try to find one whose load * is less than difference.If none exists, then we chose one larger than the * difference, provided it does not make the most idle CPU worse than the * most busy one. In the end, we clear all the busy fields for CPUs. For * IRQs, they are cleared as they are scanned. */ void apic_intr_redistribute(void) { int busiest_cpu, most_free_cpu; int cpu_free, cpu_busy, max_busy, min_busy; int min_free, diff; int average_busy, cpus_online; int i, busy; ulong_t iflag; apic_cpus_info_t *cpu_infop; apic_irq_t *min_busy_irq = NULL; apic_irq_t *max_busy_irq = NULL; busiest_cpu = most_free_cpu = -1; cpu_free = cpu_busy = max_busy = average_busy = 0; min_free = apic_sample_factor_redistribution; cpus_online = 0; /* * Below we will check for CPU_INTR_ENABLE, bound, temp_bound, temp_cpu * without ioapic_lock. That is OK as we are just doing statistical * sampling anyway and any inaccuracy now will get corrected next time * The call to rebind which actually changes things will make sure * we are consistent. */ for (i = 0; i < apic_nproc; i++) { if (apic_cpu_in_range(i) && !(apic_redist_cpu_skip & (1 << i)) && (apic_cpus[i].aci_status & APIC_CPU_INTR_ENABLE)) { cpu_infop = &apic_cpus[i]; /* * If no unbound interrupts or only 1 total on this * CPU, skip */ if (!cpu_infop->aci_temp_bound || (cpu_infop->aci_bound + cpu_infop->aci_temp_bound) == 1) { apic_redist_cpu_skip |= 1 << i; continue; } busy = cpu_infop->aci_busy; average_busy += busy; cpus_online++; if (max_busy < busy) { max_busy = busy; busiest_cpu = i; } if (min_free > busy) { min_free = busy; most_free_cpu = i; } if (busy > apic_int_busy_mark) { cpu_busy |= 1 << i; } else { if (busy < apic_int_free_mark) cpu_free |= 1 << i; } } } if ((cpu_busy && cpu_free) || (max_busy >= (min_free + apic_diff_for_redistribution))) { apic_num_imbalance++; #ifdef DEBUG if (apic_verbose & APIC_VERBOSE_IOAPIC_FLAG) { prom_printf( "redistribute busy=%x free=%x max=%x min=%x", cpu_busy, cpu_free, max_busy, min_free); } #endif /* DEBUG */ average_busy /= cpus_online; diff = max_busy - average_busy; min_busy = max_busy; /* start with the max possible value */ max_busy = 0; min_busy_irq = max_busy_irq = NULL; i = apic_min_device_irq; for (; i <= apic_max_device_irq; i++) { apic_irq_t *irq_ptr; /* Change to linked list per CPU ? */ if ((irq_ptr = apic_irq_table[i]) == NULL) continue; /* Check for irq_busy & decide which one to move */ /* Also zero them for next round */ if ((irq_ptr->airq_temp_cpu == busiest_cpu) && irq_ptr->airq_busy) { if (irq_ptr->airq_busy < diff) { /* * Check for least busy CPU, * best fit or what ? */ if (max_busy < irq_ptr->airq_busy) { /* * Most busy within the * required differential */ max_busy = irq_ptr->airq_busy; max_busy_irq = irq_ptr; } } else { if (min_busy > irq_ptr->airq_busy) { /* * least busy, but more than * the reqd diff */ if (min_busy < (diff + average_busy - min_free)) { /* * Making sure new cpu * will not end up * worse */ min_busy = irq_ptr->airq_busy; min_busy_irq = irq_ptr; } } } } irq_ptr->airq_busy = 0; } if (max_busy_irq != NULL) { #ifdef DEBUG if (apic_verbose & APIC_VERBOSE_IOAPIC_FLAG) { prom_printf("rebinding %x to %x", max_busy_irq->airq_vector, most_free_cpu); } #endif /* DEBUG */ iflag = intr_clear(); if (lock_try(&apic_ioapic_lock)) { if (apic_rebind_all(max_busy_irq, most_free_cpu) == 0) { /* Make change permenant */ max_busy_irq->airq_cpu = (uint32_t)most_free_cpu; } lock_clear(&apic_ioapic_lock); } intr_restore(iflag); } else if (min_busy_irq != NULL) { #ifdef DEBUG if (apic_verbose & APIC_VERBOSE_IOAPIC_FLAG) { prom_printf("rebinding %x to %x", min_busy_irq->airq_vector, most_free_cpu); } #endif /* DEBUG */ iflag = intr_clear(); if (lock_try(&apic_ioapic_lock)) { if (apic_rebind_all(min_busy_irq, most_free_cpu) == 0) { /* Make change permenant */ min_busy_irq->airq_cpu = (uint32_t)most_free_cpu; } lock_clear(&apic_ioapic_lock); } intr_restore(iflag); } else { if (cpu_busy != (1 << busiest_cpu)) { apic_redist_cpu_skip |= 1 << busiest_cpu; /* * We leave cpu_skip set so that next time we * can choose another cpu */ } } apic_num_rebind++; } else { /* * found nothing. Could be that we skipped over valid CPUs * or we have balanced everything. If we had a variable * ticks_for_redistribution, it could be increased here. * apic_int_busy, int_free etc would also need to be * changed. */ if (apic_redist_cpu_skip) apic_redist_cpu_skip = 0; } for (i = 0; i < apic_nproc; i++) { if (apic_cpu_in_range(i)) { apic_cpus[i].aci_busy = 0; } } } void apic_cleanup_busy(void) { int i; apic_irq_t *irq_ptr; for (i = 0; i < apic_nproc; i++) { if (apic_cpu_in_range(i)) { apic_cpus[i].aci_busy = 0; } } for (i = apic_min_device_irq; i <= apic_max_device_irq; i++) { if ((irq_ptr = apic_irq_table[i]) != NULL) irq_ptr->airq_busy = 0; } }