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      1 /*	$NetBSD: cik_event_interrupt.c,v 1.3 2021/12/18 23:44:59 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2014 Advanced Micro Devices, Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  */
     24 
     25 #include <sys/cdefs.h>
     26 __KERNEL_RCSID(0, "$NetBSD: cik_event_interrupt.c,v 1.3 2021/12/18 23:44:59 riastradh Exp $");
     27 
     28 #include "kfd_priv.h"
     29 #include "kfd_events.h"
     30 #include "cik_int.h"
     31 #include "amdgpu_amdkfd.h"
     32 
     33 static bool cik_event_interrupt_isr(struct kfd_dev *dev,
     34 					const uint32_t *ih_ring_entry,
     35 					uint32_t *patched_ihre,
     36 					bool *patched_flag)
     37 {
     38 	const struct cik_ih_ring_entry *ihre =
     39 			(const struct cik_ih_ring_entry *)ih_ring_entry;
     40 	const struct kfd2kgd_calls *f2g = dev->kfd2kgd;
     41 	unsigned int vmid;
     42 	uint16_t pasid;
     43 	bool ret;
     44 
     45 	/* This workaround is due to HW/FW limitation on Hawaii that
     46 	 * VMID and PASID are not written into ih_ring_entry
     47 	 */
     48 	if ((ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
     49 		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) &&
     50 		dev->device_info->asic_family == CHIP_HAWAII) {
     51 		struct cik_ih_ring_entry *tmp_ihre =
     52 			(struct cik_ih_ring_entry *)patched_ihre;
     53 
     54 		*patched_flag = true;
     55 		*tmp_ihre = *ihre;
     56 
     57 		vmid = f2g->read_vmid_from_vmfault_reg(dev->kgd);
     58 		ret = f2g->get_atc_vmid_pasid_mapping_info(dev->kgd, vmid, &pasid);
     59 
     60 		tmp_ihre->ring_id &= 0x000000ff;
     61 		tmp_ihre->ring_id |= vmid << 8;
     62 		tmp_ihre->ring_id |= pasid << 16;
     63 
     64 		return ret && (pasid != 0) &&
     65 			vmid >= dev->vm_info.first_vmid_kfd &&
     66 			vmid <= dev->vm_info.last_vmid_kfd;
     67 	}
     68 
     69 	/* Only handle interrupts from KFD VMIDs */
     70 	vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
     71 	if (vmid < dev->vm_info.first_vmid_kfd ||
     72 	    vmid > dev->vm_info.last_vmid_kfd)
     73 		return 0;
     74 
     75 	/* If there is no valid PASID, it's likely a firmware bug */
     76 	pasid = (ihre->ring_id & 0xffff0000) >> 16;
     77 	if (WARN_ONCE(pasid == 0, "FW bug: No PASID in KFD interrupt"))
     78 		return 0;
     79 
     80 	/* Interrupt types we care about: various signals and faults.
     81 	 * They will be forwarded to a work queue (see below).
     82 	 */
     83 	return ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE ||
     84 		ihre->source_id == CIK_INTSRC_SDMA_TRAP ||
     85 		ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG ||
     86 		ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE ||
     87 		ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
     88 		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT;
     89 }
     90 
     91 static void cik_event_interrupt_wq(struct kfd_dev *dev,
     92 					const uint32_t *ih_ring_entry)
     93 {
     94 	const struct cik_ih_ring_entry *ihre =
     95 			(const struct cik_ih_ring_entry *)ih_ring_entry;
     96 	uint32_t context_id = ihre->data & 0xfffffff;
     97 	unsigned int vmid  = (ihre->ring_id & 0x0000ff00) >> 8;
     98 	unsigned int pasid = (ihre->ring_id & 0xffff0000) >> 16;
     99 
    100 	if (pasid == 0)
    101 		return;
    102 
    103 	if (ihre->source_id == CIK_INTSRC_CP_END_OF_PIPE)
    104 		kfd_signal_event_interrupt(pasid, context_id, 28);
    105 	else if (ihre->source_id == CIK_INTSRC_SDMA_TRAP)
    106 		kfd_signal_event_interrupt(pasid, context_id, 28);
    107 	else if (ihre->source_id == CIK_INTSRC_SQ_INTERRUPT_MSG)
    108 		kfd_signal_event_interrupt(pasid, context_id & 0xff, 8);
    109 	else if (ihre->source_id == CIK_INTSRC_CP_BAD_OPCODE)
    110 		kfd_signal_hw_exception_event(pasid);
    111 	else if (ihre->source_id == CIK_INTSRC_GFX_PAGE_INV_FAULT ||
    112 		ihre->source_id == CIK_INTSRC_GFX_MEM_PROT_FAULT) {
    113 		struct kfd_vm_fault_info info;
    114 
    115 		kfd_process_vm_fault(dev->dqm, pasid);
    116 
    117 		memset(&info, 0, sizeof(info));
    118 		amdgpu_amdkfd_gpuvm_get_vm_fault_info(dev->kgd, &info);
    119 		if (!info.page_addr && !info.status)
    120 			return;
    121 
    122 		if (info.vmid == vmid)
    123 			kfd_signal_vm_fault_event(dev, pasid, &info);
    124 		else
    125 			kfd_signal_vm_fault_event(dev, pasid, NULL);
    126 	}
    127 }
    128 
    129 const struct kfd_event_interrupt_class event_interrupt_class_cik = {
    130 	.interrupt_isr = cik_event_interrupt_isr,
    131 	.interrupt_wq = cik_event_interrupt_wq,
    132 };
    133