1/*
  2 * Copyright 2016-2018 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 "soc15_int.h"
 26#include "kfd_device_queue_manager.h"
 27#include "kfd_smi_events.h"
 28
 29static bool event_interrupt_isr_v9(struct kfd_dev *dev,
 30					const uint32_t *ih_ring_entry,
 31					uint32_t *patched_ihre,
 32					bool *patched_flag)
 33{
 34	uint16_t source_id, client_id, pasid, vmid;
 35	const uint32_t *data = ih_ring_entry;
 36
 37	/* Only handle interrupts from KFD VMIDs */
 38	vmid = SOC15_VMID_FROM_IH_ENTRY(ih_ring_entry);
 39	if (vmid < dev->vm_info.first_vmid_kfd ||
 40	    vmid > dev->vm_info.last_vmid_kfd)
 41		return false;
 42
 43	source_id = SOC15_SOURCE_ID_FROM_IH_ENTRY(ih_ring_entry);
 44	client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
 45	pasid = SOC15_PASID_FROM_IH_ENTRY(ih_ring_entry);
 46
 47	/* This is a known issue for gfx9. Under non HWS, pasid is not set
 48	 * in the interrupt payload, so we need to find out the pasid on our
 49	 * own.
 50	 */
 51	if (!pasid && dev->dqm->sched_policy == KFD_SCHED_POLICY_NO_HWS) {
 52		const uint32_t pasid_mask = 0xffff;
 53
 54		*patched_flag = true;
 55		memcpy(patched_ihre, ih_ring_entry,
 56				dev->device_info->ih_ring_entry_size);
 57
 58		pasid = dev->dqm->vmid_pasid[vmid];
 59
 60		/* Patch the pasid field */
 61		patched_ihre[3] = cpu_to_le32((le32_to_cpu(patched_ihre[3])
 62					& ~pasid_mask) | pasid);
 63	}
 64
 65	pr_debug("client id 0x%x, source id %d, vmid %d, pasid 0x%x. raw data:\n",
 66		 client_id, source_id, vmid, pasid);
 67	pr_debug("%8X, %8X, %8X, %8X, %8X, %8X, %8X, %8X.\n",
 68		 data[0], data[1], data[2], data[3],
 69		 data[4], data[5], data[6], data[7]);
 70
 71	/* If there is no valid PASID, it's likely a bug */
 72	if (WARN_ONCE(pasid == 0, "Bug: No PASID in KFD interrupt"))
 73		return false;
 74
 75	/* Interrupt types we care about: various signals and faults.
 76	 * They will be forwarded to a work queue (see below).
 77	 */
 78	return source_id == SOC15_INTSRC_CP_END_OF_PIPE ||
 79		source_id == SOC15_INTSRC_SDMA_TRAP ||
 80		source_id == SOC15_INTSRC_SQ_INTERRUPT_MSG ||
 81		source_id == SOC15_INTSRC_CP_BAD_OPCODE ||
 82		client_id == SOC15_IH_CLIENTID_VMC ||
 83		client_id == SOC15_IH_CLIENTID_VMC1 ||
 84		client_id == SOC15_IH_CLIENTID_UTCL2;
 85}
 86
 87static void event_interrupt_wq_v9(struct kfd_dev *dev,
 88					const uint32_t *ih_ring_entry)
 89{
 90	uint16_t source_id, client_id, pasid, vmid;
 91	uint32_t context_id;
 92
 93	source_id = SOC15_SOURCE_ID_FROM_IH_ENTRY(ih_ring_entry);
 94	client_id = SOC15_CLIENT_ID_FROM_IH_ENTRY(ih_ring_entry);
 95	pasid = SOC15_PASID_FROM_IH_ENTRY(ih_ring_entry);
 96	vmid = SOC15_VMID_FROM_IH_ENTRY(ih_ring_entry);
 97	context_id = SOC15_CONTEXT_ID0_FROM_IH_ENTRY(ih_ring_entry);
 98
 99	if (source_id == SOC15_INTSRC_CP_END_OF_PIPE)
100		kfd_signal_event_interrupt(pasid, context_id, 32);
101	else if (source_id == SOC15_INTSRC_SDMA_TRAP)
102		kfd_signal_event_interrupt(pasid, context_id & 0xfffffff, 28);
103	else if (source_id == SOC15_INTSRC_SQ_INTERRUPT_MSG)
104		kfd_signal_event_interrupt(pasid, context_id & 0xffffff, 24);
105	else if (source_id == SOC15_INTSRC_CP_BAD_OPCODE)
106		kfd_signal_hw_exception_event(pasid);
107	else if (client_id == SOC15_IH_CLIENTID_VMC ||
108		client_id == SOC15_IH_CLIENTID_VMC1 ||
109		 client_id == SOC15_IH_CLIENTID_UTCL2) {
110		struct kfd_vm_fault_info info = {0};
111		uint16_t ring_id = SOC15_RING_ID_FROM_IH_ENTRY(ih_ring_entry);
112
113		info.vmid = vmid;
114		info.mc_id = client_id;
115		info.page_addr = ih_ring_entry[4] |
116			(uint64_t)(ih_ring_entry[5] & 0xf) << 32;
117		info.prot_valid = ring_id & 0x08;
118		info.prot_read  = ring_id & 0x10;
119		info.prot_write = ring_id & 0x20;
120
121		kfd_smi_event_update_vmfault(dev, pasid);
122		kfd_process_vm_fault(dev->dqm, pasid);
123		kfd_signal_vm_fault_event(dev, pasid, &info);
124	}
125}
126
127const struct kfd_event_interrupt_class event_interrupt_class_v9 = {
128	.interrupt_isr = event_interrupt_isr_v9,
129	.interrupt_wq = event_interrupt_wq_v9,
130};