[deliverable/linux.git] / drivers / gpu / drm / amd / amdkfd / kfd_device.c

/*
 * Copyright 2014 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include <linux/amd-iommu.h>
#include <linux/bsearch.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include "kfd_priv.h"
#include "kfd_device_queue_manager.h"

#define MQD_SIZE_ALIGNED 768

static const struct kfd_device_info kaveri_device_info = {
	.max_pasid_bits = 16,
	.ih_ring_entry_size = 4 * sizeof(uint32_t),
	.num_of_watch_points = 4,
	.mqd_size_aligned = MQD_SIZE_ALIGNED
};

struct kfd_deviceid {
	unsigned short did;
	const struct kfd_device_info *device_info;
};

/* Please keep this sorted by increasing device id. */
static const struct kfd_deviceid supported_devices[] = {
	{ 0x1304, &kaveri_device_info },	/* Kaveri */
	{ 0x1305, &kaveri_device_info },	/* Kaveri */
	{ 0x1306, &kaveri_device_info },	/* Kaveri */
	{ 0x1307, &kaveri_device_info },	/* Kaveri */
	{ 0x1309, &kaveri_device_info },	/* Kaveri */
	{ 0x130A, &kaveri_device_info },	/* Kaveri */
	{ 0x130B, &kaveri_device_info },	/* Kaveri */
	{ 0x130C, &kaveri_device_info },	/* Kaveri */
	{ 0x130D, &kaveri_device_info },	/* Kaveri */
	{ 0x130E, &kaveri_device_info },	/* Kaveri */
	{ 0x130F, &kaveri_device_info },	/* Kaveri */
	{ 0x1310, &kaveri_device_info },	/* Kaveri */
	{ 0x1311, &kaveri_device_info },	/* Kaveri */
	{ 0x1312, &kaveri_device_info },	/* Kaveri */
	{ 0x1313, &kaveri_device_info },	/* Kaveri */
	{ 0x1315, &kaveri_device_info },	/* Kaveri */
	{ 0x1316, &kaveri_device_info },	/* Kaveri */
	{ 0x1317, &kaveri_device_info },	/* Kaveri */
	{ 0x1318, &kaveri_device_info },	/* Kaveri */
	{ 0x131B, &kaveri_device_info },	/* Kaveri */
	{ 0x131C, &kaveri_device_info },	/* Kaveri */
	{ 0x131D, &kaveri_device_info },	/* Kaveri */
};

static const struct kfd_device_info *lookup_device_info(unsigned short did)
{
	size_t i;

	for (i = 0; i < ARRAY_SIZE(supported_devices); i++) {
		if (supported_devices[i].did == did) {
			BUG_ON(supported_devices[i].device_info == NULL);
			return supported_devices[i].device_info;
		}
	}

	return NULL;
}

struct kfd_dev *kgd2kfd_probe(struct kgd_dev *kgd, struct pci_dev *pdev)
{
	struct kfd_dev *kfd;

	const struct kfd_device_info *device_info =
					lookup_device_info(pdev->device);

	if (!device_info)
		return NULL;

	kfd = kzalloc(sizeof(*kfd), GFP_KERNEL);
	if (!kfd)
		return NULL;

	kfd->kgd = kgd;
	kfd->device_info = device_info;
	kfd->pdev = pdev;
	kfd->init_complete = false;

	return kfd;
}

static bool device_iommu_pasid_init(struct kfd_dev *kfd)
{
	const u32 required_iommu_flags = AMD_IOMMU_DEVICE_FLAG_ATS_SUP |
					AMD_IOMMU_DEVICE_FLAG_PRI_SUP |
					AMD_IOMMU_DEVICE_FLAG_PASID_SUP;

	struct amd_iommu_device_info iommu_info;
	unsigned int pasid_limit;
	int err;

	err = amd_iommu_device_info(kfd->pdev, &iommu_info);
	if (err < 0) {
		dev_err(kfd_device,
			"error getting iommu info. is the iommu enabled?\n");
		return false;
	}

	if ((iommu_info.flags & required_iommu_flags) != required_iommu_flags) {
		dev_err(kfd_device, "error required iommu flags ats(%i), pri(%i), pasid(%i)\n",
		       (iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_ATS_SUP) != 0,
		       (iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_PRI_SUP) != 0,
		       (iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_PASID_SUP) != 0);
		return false;
	}

	pasid_limit = min_t(unsigned int,
			(unsigned int)1 << kfd->device_info->max_pasid_bits,
			iommu_info.max_pasids);
	/*
	 * last pasid is used for kernel queues doorbells
	 * in the future the last pasid might be used for a kernel thread.
	 */
	pasid_limit = min_t(unsigned int,
				pasid_limit,
				kfd->doorbell_process_limit - 1);

	err = amd_iommu_init_device(kfd->pdev, pasid_limit);
	if (err < 0) {
		dev_err(kfd_device, "error initializing iommu device\n");
		return false;
	}

	if (!kfd_set_pasid_limit(pasid_limit)) {
		dev_err(kfd_device, "error setting pasid limit\n");
		amd_iommu_free_device(kfd->pdev);
		return false;
	}

	return true;
}

static void iommu_pasid_shutdown_callback(struct pci_dev *pdev, int pasid)
{
	struct kfd_dev *dev = kfd_device_by_pci_dev(pdev);

	if (dev)
		kfd_unbind_process_from_device(dev, pasid);
}

bool kgd2kfd_device_init(struct kfd_dev *kfd,
			 const struct kgd2kfd_shared_resources *gpu_resources)
{
	unsigned int size;

	kfd->shared_resources = *gpu_resources;

	/* calculate max size of mqds needed for queues */
	size = max_num_of_processes *
		max_num_of_queues_per_process *
		kfd->device_info->mqd_size_aligned;

	/* add another 512KB for all other allocations on gart */
	size += 512 * 1024;

	if (kfd2kgd->init_sa_manager(kfd->kgd, size)) {
		dev_err(kfd_device,
			"Error initializing sa manager for device (%x:%x)\n",
			kfd->pdev->vendor, kfd->pdev->device);
		goto out;
	}

	kfd_doorbell_init(kfd);

	if (kfd_topology_add_device(kfd) != 0) {
		dev_err(kfd_device,
			"Error adding device (%x:%x) to topology\n",
			kfd->pdev->vendor, kfd->pdev->device);
		goto kfd_topology_add_device_error;
	}

	if (kfd_interrupt_init(kfd)) {
		dev_err(kfd_device,
			"Error initializing interrupts for device (%x:%x)\n",
			kfd->pdev->vendor, kfd->pdev->device);
		goto kfd_interrupt_error;
	}

	if (!device_iommu_pasid_init(kfd)) {
		dev_err(kfd_device,
			"Error initializing iommuv2 for device (%x:%x)\n",
			kfd->pdev->vendor, kfd->pdev->device);
		goto device_iommu_pasid_error;
	}
	amd_iommu_set_invalidate_ctx_cb(kfd->pdev,
						iommu_pasid_shutdown_callback);

	kfd->dqm = device_queue_manager_init(kfd);
	if (!kfd->dqm) {
		dev_err(kfd_device,
			"Error initializing queue manager for device (%x:%x)\n",
			kfd->pdev->vendor, kfd->pdev->device);
		goto device_queue_manager_error;
	}

	if (kfd->dqm->start(kfd->dqm) != 0) {
		dev_err(kfd_device,
			"Error starting queuen manager for device (%x:%x)\n",
			kfd->pdev->vendor, kfd->pdev->device);
		goto dqm_start_error;
	}

	kfd->init_complete = true;
	dev_info(kfd_device, "added device (%x:%x)\n", kfd->pdev->vendor,
		 kfd->pdev->device);

	pr_debug("kfd: Starting kfd with the following scheduling policy %d\n",
		sched_policy);

	goto out;

dqm_start_error:
	device_queue_manager_uninit(kfd->dqm);
device_queue_manager_error:
	amd_iommu_free_device(kfd->pdev);
device_iommu_pasid_error:
	kfd_interrupt_exit(kfd);
kfd_interrupt_error:
	kfd_topology_remove_device(kfd);
kfd_topology_add_device_error:
	kfd2kgd->fini_sa_manager(kfd->kgd);
	dev_err(kfd_device,
		"device (%x:%x) NOT added due to errors\n",
		kfd->pdev->vendor, kfd->pdev->device);
out:
	return kfd->init_complete;
}

void kgd2kfd_device_exit(struct kfd_dev *kfd)
{
	if (kfd->init_complete) {
		device_queue_manager_uninit(kfd->dqm);
		amd_iommu_free_device(kfd->pdev);
		kfd_interrupt_exit(kfd);
		kfd_topology_remove_device(kfd);
	}

	kfree(kfd);
}

void kgd2kfd_suspend(struct kfd_dev *kfd)
{
	BUG_ON(kfd == NULL);

	if (kfd->init_complete) {
		kfd->dqm->stop(kfd->dqm);
		amd_iommu_set_invalidate_ctx_cb(kfd->pdev, NULL);
		amd_iommu_free_device(kfd->pdev);
	}
}

int kgd2kfd_resume(struct kfd_dev *kfd)
{
	unsigned int pasid_limit;
	int err;

	BUG_ON(kfd == NULL);

	pasid_limit = kfd_get_pasid_limit();

	if (kfd->init_complete) {
		err = amd_iommu_init_device(kfd->pdev, pasid_limit);
		if (err < 0)
			return -ENXIO;
		amd_iommu_set_invalidate_ctx_cb(kfd->pdev,
						iommu_pasid_shutdown_callback);
		kfd->dqm->start(kfd->dqm);
	}

	return 0;
}

/* This is called directly from KGD at ISR. */
void kgd2kfd_interrupt(struct kfd_dev *kfd, const void *ih_ring_entry)
{
	if (kfd->init_complete) {
		spin_lock(&kfd->interrupt_lock);

		if (kfd->interrupts_active
		    && enqueue_ih_ring_entry(kfd, ih_ring_entry))
			schedule_work(&kfd->interrupt_work);

		spin_unlock(&kfd->interrupt_lock);
	}
}
Commit	Line	Data
4a488a7a OG	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 <linux/amd-iommu.h>
	24	#include <linux/bsearch.h>
	25	#include <linux/pci.h>
	26	#include <linux/slab.h>
	27	#include "kfd_priv.h"
64c7f8cf	28	#include "kfd_device_queue_manager.h"
4a488a7a	29
19f6d2a6 OG	30	#define MQD_SIZE_ALIGNED 768
19f6d2a6 OG	31
4a488a7a OG	32	static const struct kfd_device_info kaveri_device_info = {
4a488a7a OG	33	.max_pasid_bits = 16,
b3f5e6b4	34	.ih_ring_entry_size = 4 * sizeof(uint32_t),
f7c826ad	35	.num_of_watch_points = 4,
19f6d2a6	36	.mqd_size_aligned = MQD_SIZE_ALIGNED
4a488a7a OG	37	};
	38
	39	struct kfd_deviceid {
	40	unsigned short did;
	41	const struct kfd_device_info *device_info;
	42	};
	43
	44	/* Please keep this sorted by increasing device id. */
	45	static const struct kfd_deviceid supported_devices[] = {
	46	{ 0x1304, &kaveri_device_info }, /* Kaveri */
	47	{ 0x1305, &kaveri_device_info }, /* Kaveri */
	48	{ 0x1306, &kaveri_device_info }, /* Kaveri */
	49	{ 0x1307, &kaveri_device_info }, /* Kaveri */
	50	{ 0x1309, &kaveri_device_info }, /* Kaveri */
	51	{ 0x130A, &kaveri_device_info }, /* Kaveri */
	52	{ 0x130B, &kaveri_device_info }, /* Kaveri */
	53	{ 0x130C, &kaveri_device_info }, /* Kaveri */
	54	{ 0x130D, &kaveri_device_info }, /* Kaveri */
	55	{ 0x130E, &kaveri_device_info }, /* Kaveri */
	56	{ 0x130F, &kaveri_device_info }, /* Kaveri */
	57	{ 0x1310, &kaveri_device_info }, /* Kaveri */
	58	{ 0x1311, &kaveri_device_info }, /* Kaveri */
	59	{ 0x1312, &kaveri_device_info }, /* Kaveri */
	60	{ 0x1313, &kaveri_device_info }, /* Kaveri */
	61	{ 0x1315, &kaveri_device_info }, /* Kaveri */
	62	{ 0x1316, &kaveri_device_info }, /* Kaveri */
	63	{ 0x1317, &kaveri_device_info }, /* Kaveri */
	64	{ 0x1318, &kaveri_device_info }, /* Kaveri */
	65	{ 0x131B, &kaveri_device_info }, /* Kaveri */
	66	{ 0x131C, &kaveri_device_info }, /* Kaveri */
	67	{ 0x131D, &kaveri_device_info }, /* Kaveri */
	68	};
	69
	70	static const struct kfd_device_info *lookup_device_info(unsigned short did)
	71	{
	72	size_t i;
	73
	74	for (i = 0; i < ARRAY_SIZE(supported_devices); i++) {
	75	if (supported_devices[i].did == did) {
	76	BUG_ON(supported_devices[i].device_info == NULL);
	77	return supported_devices[i].device_info;
	78	}
	79	}
	80
	81	return NULL;
	82	}
	83
	84	struct kfd_dev kgd2kfd_probe(struct kgd_dev kgd, struct pci_dev *pdev)
	85	{
	86	struct kfd_dev *kfd;
	87
	88	const struct kfd_device_info *device_info =
	89	lookup_device_info(pdev->device);
	90
	91	if (!device_info)
	92	return NULL;
	93
	94	kfd = kzalloc(sizeof(*kfd), GFP_KERNEL);
	95	if (!kfd)
	96	return NULL;
	97
	98	kfd->kgd = kgd;
	99	kfd->device_info = device_info;
	100	kfd->pdev = pdev;
19f6d2a6	101	kfd->init_complete = false;
4a488a7a OG	102
	103	return kfd;
	104	}
	105
b17f068a OG	106	static bool device_iommu_pasid_init(struct kfd_dev *kfd)
	107	{
	108	const u32 required_iommu_flags = AMD_IOMMU_DEVICE_FLAG_ATS_SUP \|
	109	AMD_IOMMU_DEVICE_FLAG_PRI_SUP \|
	110	AMD_IOMMU_DEVICE_FLAG_PASID_SUP;
	111
	112	struct amd_iommu_device_info iommu_info;
	113	unsigned int pasid_limit;
	114	int err;
	115
	116	err = amd_iommu_device_info(kfd->pdev, &iommu_info);
	117	if (err < 0) {
	118	dev_err(kfd_device,
	119	"error getting iommu info. is the iommu enabled?\n");
	120	return false;
	121	}
	122
	123	if ((iommu_info.flags & required_iommu_flags) != required_iommu_flags) {
	124	dev_err(kfd_device, "error required iommu flags ats(%i), pri(%i), pasid(%i)\n",
	125	(iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_ATS_SUP) != 0,
	126	(iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_PRI_SUP) != 0,
	127	(iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_PASID_SUP) != 0);
	128	return false;
	129	}
	130
	131	pasid_limit = min_t(unsigned int,
	132	(unsigned int)1 << kfd->device_info->max_pasid_bits,
	133	iommu_info.max_pasids);
	134	/*
	135	* last pasid is used for kernel queues doorbells
	136	* in the future the last pasid might be used for a kernel thread.
	137	*/
	138	pasid_limit = min_t(unsigned int,
	139	pasid_limit,
	140	kfd->doorbell_process_limit - 1);
	141
	142	err = amd_iommu_init_device(kfd->pdev, pasid_limit);
	143	if (err < 0) {
	144	dev_err(kfd_device, "error initializing iommu device\n");
	145	return false;
	146	}
	147
	148	if (!kfd_set_pasid_limit(pasid_limit)) {
	149	dev_err(kfd_device, "error setting pasid limit\n");
	150	amd_iommu_free_device(kfd->pdev);
	151	return false;
	152	}
	153
	154	return true;
	155	}
	156
	157	static void iommu_pasid_shutdown_callback(struct pci_dev *pdev, int pasid)
	158	{
	159	struct kfd_dev *dev = kfd_device_by_pci_dev(pdev);
	160
	161	if (dev)
	162	kfd_unbind_process_from_device(dev, pasid);
	163	}
	164
4a488a7a OG	165	bool kgd2kfd_device_init(struct kfd_dev *kfd,
	166	const struct kgd2kfd_shared_resources *gpu_resources)
	167	{
19f6d2a6 OG	168	unsigned int size;
19f6d2a6 OG	169
4a488a7a OG	170	kfd->shared_resources = *gpu_resources;
4a488a7a OG	171
19f6d2a6 OG	172	/* calculate max size of mqds needed for queues */
	173	size = max_num_of_processes *
	174	max_num_of_queues_per_process *
	175	kfd->device_info->mqd_size_aligned;
	176
	177	/* add another 512KB for all other allocations on gart */
	178	size += 512 * 1024;
	179
	180	if (kfd2kgd->init_sa_manager(kfd->kgd, size)) {
	181	dev_err(kfd_device,
	182	"Error initializing sa manager for device (%x:%x)\n",
	183	kfd->pdev->vendor, kfd->pdev->device);
	184	goto out;
	185	}
	186
	187	kfd_doorbell_init(kfd);
	188
	189	if (kfd_topology_add_device(kfd) != 0) {
	190	dev_err(kfd_device,
	191	"Error adding device (%x:%x) to topology\n",
	192	kfd->pdev->vendor, kfd->pdev->device);
	193	goto kfd_topology_add_device_error;
	194	}
	195
b3f5e6b4 AL	196	if (kfd_interrupt_init(kfd)) {
	197	dev_err(kfd_device,
	198	"Error initializing interrupts for device (%x:%x)\n",
	199	kfd->pdev->vendor, kfd->pdev->device);
	200	goto kfd_interrupt_error;
	201	}
	202
b17f068a OG	203	if (!device_iommu_pasid_init(kfd)) {
	204	dev_err(kfd_device,
	205	"Error initializing iommuv2 for device (%x:%x)\n",
	206	kfd->pdev->vendor, kfd->pdev->device);
	207	goto device_iommu_pasid_error;
	208	}
	209	amd_iommu_set_invalidate_ctx_cb(kfd->pdev,
	210	iommu_pasid_shutdown_callback);
5b5c4e40	211
64c7f8cf BG	212	kfd->dqm = device_queue_manager_init(kfd);
	213	if (!kfd->dqm) {
	214	dev_err(kfd_device,
	215	"Error initializing queue manager for device (%x:%x)\n",
	216	kfd->pdev->vendor, kfd->pdev->device);
	217	goto device_queue_manager_error;
	218	}
	219
	220	if (kfd->dqm->start(kfd->dqm) != 0) {
	221	dev_err(kfd_device,
	222	"Error starting queuen manager for device (%x:%x)\n",
	223	kfd->pdev->vendor, kfd->pdev->device);
	224	goto dqm_start_error;
	225	}
	226
4a488a7a OG	227	kfd->init_complete = true;
	228	dev_info(kfd_device, "added device (%x:%x)\n", kfd->pdev->vendor,
	229	kfd->pdev->device);
	230
64c7f8cf BG	231	pr_debug("kfd: Starting kfd with the following scheduling policy %d\n",
	232	sched_policy);
	233
19f6d2a6 OG	234	goto out;
19f6d2a6 OG	235
64c7f8cf BG	236	dqm_start_error:
	237	device_queue_manager_uninit(kfd->dqm);
	238	device_queue_manager_error:
	239	amd_iommu_free_device(kfd->pdev);
b17f068a	240	device_iommu_pasid_error:
b3f5e6b4 AL	241	kfd_interrupt_exit(kfd);
b3f5e6b4 AL	242	kfd_interrupt_error:
b17f068a	243	kfd_topology_remove_device(kfd);
19f6d2a6 OG	244	kfd_topology_add_device_error:
	245	kfd2kgd->fini_sa_manager(kfd->kgd);
	246	dev_err(kfd_device,
	247	"device (%x:%x) NOT added due to errors\n",
	248	kfd->pdev->vendor, kfd->pdev->device);
	249	out:
	250	return kfd->init_complete;
4a488a7a OG	251	}
	252
	253	void kgd2kfd_device_exit(struct kfd_dev *kfd)
	254	{
b17f068a	255	if (kfd->init_complete) {
64c7f8cf	256	device_queue_manager_uninit(kfd->dqm);
b17f068a	257	amd_iommu_free_device(kfd->pdev);
b3f5e6b4	258	kfd_interrupt_exit(kfd);
b17f068a OG	259	kfd_topology_remove_device(kfd);
b17f068a OG	260	}
5b5c4e40	261
4a488a7a OG	262	kfree(kfd);
	263	}
	264
	265	void kgd2kfd_suspend(struct kfd_dev *kfd)
	266	{
	267	BUG_ON(kfd == NULL);
b17f068a	268
64c7f8cf BG	269	if (kfd->init_complete) {
64c7f8cf BG	270	kfd->dqm->stop(kfd->dqm);
abc9d3e3	271	amd_iommu_set_invalidate_ctx_cb(kfd->pdev, NULL);
b17f068a	272	amd_iommu_free_device(kfd->pdev);
64c7f8cf	273	}
4a488a7a OG	274	}
	275
	276	int kgd2kfd_resume(struct kfd_dev *kfd)
	277	{
b17f068a OG	278	unsigned int pasid_limit;
	279	int err;
	280
4a488a7a OG	281	BUG_ON(kfd == NULL);
4a488a7a OG	282
b17f068a OG	283	pasid_limit = kfd_get_pasid_limit();
	284
	285	if (kfd->init_complete) {
	286	err = amd_iommu_init_device(kfd->pdev, pasid_limit);
	287	if (err < 0)
	288	return -ENXIO;
	289	amd_iommu_set_invalidate_ctx_cb(kfd->pdev,
	290	iommu_pasid_shutdown_callback);
64c7f8cf	291	kfd->dqm->start(kfd->dqm);
b17f068a OG	292	}
b17f068a OG	293
4a488a7a OG	294	return 0;
	295	}
	296
b3f5e6b4 AL	297	/* This is called directly from KGD at ISR. */
b3f5e6b4 AL	298	void kgd2kfd_interrupt(struct kfd_dev kfd, const void ih_ring_entry)
4a488a7a	299	{
b3f5e6b4 AL	300	if (kfd->init_complete) {
	301	spin_lock(&kfd->interrupt_lock);
	302
	303	if (kfd->interrupts_active
	304	&& enqueue_ih_ring_entry(kfd, ih_ring_entry))
	305	schedule_work(&kfd->interrupt_work);
	306
	307	spin_unlock(&kfd->interrupt_lock);
	308	}
4a488a7a	309	}