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
 28static bool cik_event_interrupt_isr(struct kfd_dev *dev,
 29					const uint32_t *ih_ring_entry,
 30					uint32_t *patched_ihre,
 31					bool *patched_flag)
 32{
 33	const struct cik_ih_ring_entry *ihre =
 34			(const struct cik_ih_ring_entry *)ih_ring_entry;
 35	const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
 36	unsigned int vmid, pasid;
 37
 38	/* This workaround is due to HW/FW limitation on Hawaii that
 39	 * VMID and PASID are not written into ih_ring_entry
 40	 */
 41	if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
 42		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
 43		dev->device_info->asic_family == CHIP_HAWAII) {
 44		struct cik_ih_ring_entry *tmp_ihre =
 45			(struct cik_ih_ring_entry *)patched_ihre;
 46
 47		*patched_flag = true;
 48		*tmp_ihre = *ihre;
 49
 50		vmid = f2g->read_vmid_from_vmfault_reg(dev->kgd);
 51		pasid = f2g->get_atc_vmid_pasid_mapping_pasid(dev->kgd, vmid);
 52
 53		tmp_ihre->ring_id &= 0x000000ff;
 54		tmp_ihre->ring_id |= vmid << 8;
 55		tmp_ihre->ring_id |= pasid << 16;
 56
 57		return (pasid != 0) &&
 58			vmid >= dev->vm_info.first_vmid_kfd &&
 59			vmid <= dev->vm_info.last_vmid_kfd;
 60	}
 61
 62	/* Only handle interrupts from KFD VMIDs */
 63	vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
 64	if (vmid < dev->vm_info.first_vmid_kfd ||
 65	    vmid > dev->vm_info.last_vmid_kfd)
 66		return 0;
 67
 68	/* If there is no valid PASID, it's likely a firmware bug */
 69	pasid = (ihre->ring_id & 0xffff0000) >> 16;
 70	if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
 71		return 0;
 72
 73	/* Interrupt types we care about: various signals and faults.
 74	 * They will be forwarded to a work queue (see below).
 75	 */
 76	return ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
 77		ihre->source_id == CIK_INTSRC_SDMA_TRAP ||
 78		ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG ||
 79		ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE ||
 80		ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
 81		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT;
 82}
 83
 84static void cik_event_interrupt_wq(struct kfd_dev *dev,
 85					const uint32_t *ih_ring_entry)
 86{
 87	const struct cik_ih_ring_entry *ihre =
 88			(const struct cik_ih_ring_entry *)ih_ring_entry;
 89	uint32_t context_id = ihre->data & 0xfffffff;
 90	unsigned int vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
 91	unsigned int pasid = (ihre->ring_id & 0xffff0000) >> 16;
 92
 93	if (pasid == 0)
 94		return;
 95
 96	if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
 97		kfd_signal_event_interrupt(pasid, context_id, 28);
 98	else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
 99		kfd_signal_event_interrupt(pasid, context_id, 28);
100	else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
101		kfd_signal_event_interrupt(pasid, context_id & 0xff, 8);
102	else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
103		kfd_signal_hw_exception_event(pasid);
104	else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
105		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
106		struct kfd_vm_fault_info info;
107
108		kfd_process_vm_fault(dev->dqm, pasid);
109
110		memset(&info, 0, sizeof(info));
111		amdgpu_amdkfd_gpuvm_get_vm_fault_info(dev->kgd, &info);
112		if (!info.page_addr && !info.status)
113			return;
114
115		if (info.vmid == vmid)
116			kfd_signal_vm_fault_event(dev, pasid, &info);
117		else
118			kfd_signal_vm_fault_event(dev, pasid, NULL);
119	}
120}
121
122const struct kfd_event_interrupt_class event_interrupt_class_cik = {
123	.interrupt_isr = cik_event_interrupt_isr,
124	.interrupt_wq = cik_event_interrupt_wq,
125};