1/*
  2 * Copyright 2014 Advanced Micro Devices, Inc.
  3 *
  4 * Permission is hereby granted, free of charge, to any person obtaining a
  5 * copy of this software and associated documentation files (the "Software"),
  6 * to deal in the Software without restriction, including without limitation
  7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8 * and/or sell copies of the Software, and to permit persons to whom the
  9 * Software is furnished to do so, subject to the following conditions:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 20 * OTHER DEALINGS IN THE SOFTWARE.
 21 */
 22
 23#include "kfd_priv.h"
 24#include "kfd_events.h"
 25#include "cik_int.h"
 26#include "amdgpu_amdkfd.h"
 27#include "kfd_smi_events.h"
 28
 29static bool cik_event_interrupt_isr(struct kfd_dev *dev,
 30					const uint32_t *ih_ring_entry,
 31					uint32_t *patched_ihre,
 32					bool *patched_flag)
 33{
 34	const struct cik_ih_ring_entry *ihre =
 35			(const struct cik_ih_ring_entry *)ih_ring_entry;
 36	const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
 37	unsigned int vmid;
 38	uint16_t pasid;
 39	bool ret;
 40
 41	/* This workaround is due to HW/FW limitation on Hawaii that
 42	 * VMID and PASID are not written into ih_ring_entry
 43	 */
 44	if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
 45		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
 46		dev->device_info->asic_family == CHIP_HAWAII) {
 47		struct cik_ih_ring_entry *tmp_ihre =
 48			(struct cik_ih_ring_entry *)patched_ihre;
 49
 50		*patched_flag = true;
 51		*tmp_ihre = *ihre;
 52
 53		vmid = f2g->read_vmid_from_vmfault_reg(dev->kgd);
 54		ret = f2g->get_atc_vmid_pasid_mapping_info(dev->kgd, vmid, &pasid);
 55
 56		tmp_ihre->ring_id &= 0x000000ff;
 57		tmp_ihre->ring_id |= vmid << 8;
 58		tmp_ihre->ring_id |= pasid << 16;
 59
 60		return ret && (pasid != 0) &&
 61			vmid >= dev->vm_info.first_vmid_kfd &&
 62			vmid <= dev->vm_info.last_vmid_kfd;
 63	}
 64
 65	/* Only handle interrupts from KFD VMIDs */
 66	vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
 67	if (vmid < dev->vm_info.first_vmid_kfd ||
 68	    vmid > dev->vm_info.last_vmid_kfd)
 69		return 0;
 70
 71	/* If there is no valid PASID, it's likely a firmware bug */
 72	pasid = (ihre->ring_id & 0xffff0000) >> 16;
 73	if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
 74		return 0;
 75
 76	/* Interrupt types we care about: various signals and faults.
 77	 * They will be forwarded to a work queue (see below).
 78	 */
 79	return ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
 80		ihre->source_id == CIK_INTSRC_SDMA_TRAP ||
 81		ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG ||
 82		ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE ||
 83		ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
 84		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT;
 85}
 86
 87static void cik_event_interrupt_wq(struct kfd_dev *dev,
 88					const uint32_t *ih_ring_entry)
 89{
 90	const struct cik_ih_ring_entry *ihre =
 91			(const struct cik_ih_ring_entry *)ih_ring_entry;
 92	uint32_t context_id = ihre->data & 0xfffffff;
 93	unsigned int vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
 94	unsigned int pasid = (ihre->ring_id & 0xffff0000) >> 16;
 95
 96	if (pasid == 0)
 97		return;
 98
 99	if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
100		kfd_signal_event_interrupt(pasid, context_id, 28);
101	else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
102		kfd_signal_event_interrupt(pasid, context_id, 28);
103	else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
104		kfd_signal_event_interrupt(pasid, context_id & 0xff, 8);
105	else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
106		kfd_signal_hw_exception_event(pasid);
107	else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
108		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
109		struct kfd_vm_fault_info info;
110
111		kfd_smi_event_update_vmfault(dev, pasid);
112		kfd_process_vm_fault(dev->dqm, pasid);
113
114		memset(&info, 0, sizeof(info));
115		amdgpu_amdkfd_gpuvm_get_vm_fault_info(dev->kgd, &info);
116		if (!info.page_addr && !info.status)
117			return;
118
119		if (info.vmid == vmid)
120			kfd_signal_vm_fault_event(dev, pasid, &info);
121		else
122			kfd_signal_vm_fault_event(dev, pasid, NULL);
123	}
124}
125
126const struct kfd_event_interrupt_class event_interrupt_class_cik = {
127	.interrupt_isr = cik_event_interrupt_isr,
128	.interrupt_wq = cik_event_interrupt_wq,
129};