[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"
#include "kfd_pm4_headers.h"

#define MQD_SIZE_ALIGNED 768

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

static const struct kfd_device_info carrizo_device_info = {
	.asic_family = CHIP_CARRIZO,
	.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 int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
				unsigned int chunk_size);
static void kfd_gtt_sa_fini(struct kfd_dev *kfd);

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_queues_per_device *
			kfd->device_info->mqd_size_aligned;

	/*
	 * calculate max size of runlist packet.
	 * There can be only 2 packets at once
	 */
	size += (KFD_MAX_NUM_OF_PROCESSES * sizeof(struct pm4_map_process) +
		max_num_of_queues_per_device *
		sizeof(struct pm4_map_queues) + sizeof(struct pm4_runlist)) * 2;

	/* Add size of HIQ & DIQ */
	size += KFD_KERNEL_QUEUE_SIZE * 2;

	/* add another 512KB for all other allocations on gart (HPD, fences) */
	size += 512 * 1024;

	if (kfd2kgd->init_gtt_mem_allocation(kfd->kgd, size, &kfd->gtt_mem,
			&kfd->gtt_start_gpu_addr, &kfd->gtt_start_cpu_ptr)) {
		dev_err(kfd_device,
			"Could not allocate %d bytes for device (%x:%x)\n",
			size, kfd->pdev->vendor, kfd->pdev->device);
		goto out;
	}

	dev_info(kfd_device,
		"Allocated %d bytes on gart for device(%x:%x)\n",
		size, kfd->pdev->vendor, kfd->pdev->device);

	/* Initialize GTT sa with 512 byte chunk size */
	if (kfd_gtt_sa_init(kfd, size, 512) != 0) {
		dev_err(kfd_device,
			"Error initializing gtt sub-allocator\n");
		goto kfd_gtt_sa_init_error;
	}

	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 (!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->ops.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_topology_remove_device(kfd);
kfd_topology_add_device_error:
	kfd_gtt_sa_fini(kfd);
kfd_gtt_sa_init_error:
	kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
	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_topology_remove_device(kfd);
		kfd_gtt_sa_fini(kfd);
		kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
	}

	kfree(kfd);
}

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

	if (kfd->init_complete) {
		kfd->dqm->ops.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->ops.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)
{
	/* Process interrupts / schedule work as necessary */
}

static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
				unsigned int chunk_size)
{
	unsigned int num_of_bits;

	BUG_ON(!kfd);
	BUG_ON(!kfd->gtt_mem);
	BUG_ON(buf_size < chunk_size);
	BUG_ON(buf_size == 0);
	BUG_ON(chunk_size == 0);

	kfd->gtt_sa_chunk_size = chunk_size;
	kfd->gtt_sa_num_of_chunks = buf_size / chunk_size;

	num_of_bits = kfd->gtt_sa_num_of_chunks / BITS_PER_BYTE;
	BUG_ON(num_of_bits == 0);

	kfd->gtt_sa_bitmap = kzalloc(num_of_bits, GFP_KERNEL);

	if (!kfd->gtt_sa_bitmap)
		return -ENOMEM;

	pr_debug("kfd: gtt_sa_num_of_chunks = %d, gtt_sa_bitmap = %p\n",
			kfd->gtt_sa_num_of_chunks, kfd->gtt_sa_bitmap);

	mutex_init(&kfd->gtt_sa_lock);

	return 0;

}

static void kfd_gtt_sa_fini(struct kfd_dev *kfd)
{
	mutex_destroy(&kfd->gtt_sa_lock);
	kfree(kfd->gtt_sa_bitmap);
}

static inline uint64_t kfd_gtt_sa_calc_gpu_addr(uint64_t start_addr,
						unsigned int bit_num,
						unsigned int chunk_size)
{
	return start_addr + bit_num * chunk_size;
}

static inline uint32_t *kfd_gtt_sa_calc_cpu_addr(void *start_addr,
						unsigned int bit_num,
						unsigned int chunk_size)
{
	return (uint32_t *) ((uint64_t) start_addr + bit_num * chunk_size);
}

int kfd_gtt_sa_allocate(struct kfd_dev *kfd, unsigned int size,
			struct kfd_mem_obj **mem_obj)
{
	unsigned int found, start_search, cur_size;

	BUG_ON(!kfd);

	if (size == 0)
		return -EINVAL;

	if (size > kfd->gtt_sa_num_of_chunks * kfd->gtt_sa_chunk_size)
		return -ENOMEM;

	*mem_obj = kmalloc(sizeof(struct kfd_mem_obj), GFP_KERNEL);
	if ((*mem_obj) == NULL)
		return -ENOMEM;

	pr_debug("kfd: allocated mem_obj = %p for size = %d\n", *mem_obj, size);

	start_search = 0;

	mutex_lock(&kfd->gtt_sa_lock);

kfd_gtt_restart_search:
	/* Find the first chunk that is free */
	found = find_next_zero_bit(kfd->gtt_sa_bitmap,
					kfd->gtt_sa_num_of_chunks,
					start_search);

	pr_debug("kfd: found = %d\n", found);

	/* If there wasn't any free chunk, bail out */
	if (found == kfd->gtt_sa_num_of_chunks)
		goto kfd_gtt_no_free_chunk;

	/* Update fields of mem_obj */
	(*mem_obj)->range_start = found;
	(*mem_obj)->range_end = found;
	(*mem_obj)->gpu_addr = kfd_gtt_sa_calc_gpu_addr(
					kfd->gtt_start_gpu_addr,
					found,
					kfd->gtt_sa_chunk_size);
	(*mem_obj)->cpu_ptr = kfd_gtt_sa_calc_cpu_addr(
					kfd->gtt_start_cpu_ptr,
					found,
					kfd->gtt_sa_chunk_size);

	pr_debug("kfd: gpu_addr = %p, cpu_addr = %p\n",
			(uint64_t *) (*mem_obj)->gpu_addr, (*mem_obj)->cpu_ptr);

	/* If we need only one chunk, mark it as allocated and get out */
	if (size <= kfd->gtt_sa_chunk_size) {
		pr_debug("kfd: single bit\n");
		set_bit(found, kfd->gtt_sa_bitmap);
		goto kfd_gtt_out;
	}

	/* Otherwise, try to see if we have enough contiguous chunks */
	cur_size = size - kfd->gtt_sa_chunk_size;
	do {
		(*mem_obj)->range_end =
			find_next_zero_bit(kfd->gtt_sa_bitmap,
					kfd->gtt_sa_num_of_chunks, ++found);
		/*
		 * If next free chunk is not contiguous than we need to
		 * restart our search from the last free chunk we found (which
		 * wasn't contiguous to the previous ones
		 */
		if ((*mem_obj)->range_end != found) {
			start_search = found;
			goto kfd_gtt_restart_search;
		}

		/*
		 * If we reached end of buffer, bail out with error
		 */
		if (found == kfd->gtt_sa_num_of_chunks)
			goto kfd_gtt_no_free_chunk;

		/* Check if we don't need another chunk */
		if (cur_size <= kfd->gtt_sa_chunk_size)
			cur_size = 0;
		else
			cur_size -= kfd->gtt_sa_chunk_size;

	} while (cur_size > 0);

	pr_debug("kfd: range_start = %d, range_end = %d\n",
		(*mem_obj)->range_start, (*mem_obj)->range_end);

	/* Mark the chunks as allocated */
	for (found = (*mem_obj)->range_start;
		found <= (*mem_obj)->range_end;
		found++)
		set_bit(found, kfd->gtt_sa_bitmap);

kfd_gtt_out:
	mutex_unlock(&kfd->gtt_sa_lock);
	return 0;

kfd_gtt_no_free_chunk:
	pr_debug("kfd: allocation failed with mem_obj = %p\n", mem_obj);
	mutex_unlock(&kfd->gtt_sa_lock);
	kfree(mem_obj);
	return -ENOMEM;
}

int kfd_gtt_sa_free(struct kfd_dev *kfd, struct kfd_mem_obj *mem_obj)
{
	unsigned int bit;

	BUG_ON(!kfd);

	/* Act like kfree when trying to free a NULL object */
	if (!mem_obj)
		return 0;

	pr_debug("kfd: free mem_obj = %p, range_start = %d, range_end = %d\n",
			mem_obj, mem_obj->range_start, mem_obj->range_end);

	mutex_lock(&kfd->gtt_sa_lock);

	/* Mark the chunks as free */
	for (bit = mem_obj->range_start;
		bit <= mem_obj->range_end;
		bit++)
		clear_bit(bit, kfd->gtt_sa_bitmap);

	mutex_unlock(&kfd->gtt_sa_lock);

	kfree(mem_obj);
	return 0;
}
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"
e18e794e	29	#include "kfd_pm4_headers.h"
4a488a7a	30
19f6d2a6 OG	31	#define MQD_SIZE_ALIGNED 768
19f6d2a6 OG	32
4a488a7a	33	static const struct kfd_device_info kaveri_device_info = {
0da7558c BG	34	.asic_family = CHIP_KAVERI,
	35	.max_pasid_bits = 16,
	36	.ih_ring_entry_size = 4 * sizeof(uint32_t),
	37	.mqd_size_aligned = MQD_SIZE_ALIGNED
	38	};
	39
	40	static const struct kfd_device_info carrizo_device_info = {
	41	.asic_family = CHIP_CARRIZO,
4a488a7a	42	.max_pasid_bits = 16,
b3f5e6b4	43	.ih_ring_entry_size = 4 * sizeof(uint32_t),
f7c826ad	44	.num_of_watch_points = 4,
19f6d2a6	45	.mqd_size_aligned = MQD_SIZE_ALIGNED
4a488a7a OG	46	};
	47
	48	struct kfd_deviceid {
	49	unsigned short did;
	50	const struct kfd_device_info *device_info;
	51	};
	52
	53	/* Please keep this sorted by increasing device id. */
	54	static const struct kfd_deviceid supported_devices[] = {
	55	{ 0x1304, &kaveri_device_info }, /* Kaveri */
	56	{ 0x1305, &kaveri_device_info }, /* Kaveri */
	57	{ 0x1306, &kaveri_device_info }, /* Kaveri */
	58	{ 0x1307, &kaveri_device_info }, /* Kaveri */
	59	{ 0x1309, &kaveri_device_info }, /* Kaveri */
	60	{ 0x130A, &kaveri_device_info }, /* Kaveri */
	61	{ 0x130B, &kaveri_device_info }, /* Kaveri */
	62	{ 0x130C, &kaveri_device_info }, /* Kaveri */
	63	{ 0x130D, &kaveri_device_info }, /* Kaveri */
	64	{ 0x130E, &kaveri_device_info }, /* Kaveri */
	65	{ 0x130F, &kaveri_device_info }, /* Kaveri */
	66	{ 0x1310, &kaveri_device_info }, /* Kaveri */
	67	{ 0x1311, &kaveri_device_info }, /* Kaveri */
	68	{ 0x1312, &kaveri_device_info }, /* Kaveri */
	69	{ 0x1313, &kaveri_device_info }, /* Kaveri */
	70	{ 0x1315, &kaveri_device_info }, /* Kaveri */
	71	{ 0x1316, &kaveri_device_info }, /* Kaveri */
	72	{ 0x1317, &kaveri_device_info }, /* Kaveri */
	73	{ 0x1318, &kaveri_device_info }, /* Kaveri */
	74	{ 0x131B, &kaveri_device_info }, /* Kaveri */
	75	{ 0x131C, &kaveri_device_info }, /* Kaveri */
0da7558c	76	{ 0x131D, &kaveri_device_info } /* Kaveri */
4a488a7a OG	77	};
4a488a7a OG	78
6e81090b OG	79	static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
	80	unsigned int chunk_size);
	81	static void kfd_gtt_sa_fini(struct kfd_dev *kfd);
	82
4a488a7a OG	83	static const struct kfd_device_info *lookup_device_info(unsigned short did)
	84	{
	85	size_t i;
	86
	87	for (i = 0; i < ARRAY_SIZE(supported_devices); i++) {
	88	if (supported_devices[i].did == did) {
	89	BUG_ON(supported_devices[i].device_info == NULL);
	90	return supported_devices[i].device_info;
	91	}
	92	}
	93
	94	return NULL;
	95	}
	96
	97	struct kfd_dev kgd2kfd_probe(struct kgd_dev kgd, struct pci_dev *pdev)
	98	{
	99	struct kfd_dev *kfd;
	100
	101	const struct kfd_device_info *device_info =
	102	lookup_device_info(pdev->device);
	103
	104	if (!device_info)
	105	return NULL;
	106
	107	kfd = kzalloc(sizeof(*kfd), GFP_KERNEL);
	108	if (!kfd)
	109	return NULL;
	110
	111	kfd->kgd = kgd;
	112	kfd->device_info = device_info;
	113	kfd->pdev = pdev;
19f6d2a6	114	kfd->init_complete = false;
4a488a7a OG	115
	116	return kfd;
	117	}
	118
b17f068a OG	119	static bool device_iommu_pasid_init(struct kfd_dev *kfd)
	120	{
	121	const u32 required_iommu_flags = AMD_IOMMU_DEVICE_FLAG_ATS_SUP \|
	122	AMD_IOMMU_DEVICE_FLAG_PRI_SUP \|
	123	AMD_IOMMU_DEVICE_FLAG_PASID_SUP;
	124
	125	struct amd_iommu_device_info iommu_info;
	126	unsigned int pasid_limit;
	127	int err;
	128
	129	err = amd_iommu_device_info(kfd->pdev, &iommu_info);
	130	if (err < 0) {
	131	dev_err(kfd_device,
	132	"error getting iommu info. is the iommu enabled?\n");
	133	return false;
	134	}
	135
	136	if ((iommu_info.flags & required_iommu_flags) != required_iommu_flags) {
	137	dev_err(kfd_device, "error required iommu flags ats(%i), pri(%i), pasid(%i)\n",
	138	(iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_ATS_SUP) != 0,
	139	(iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_PRI_SUP) != 0,
	140	(iommu_info.flags & AMD_IOMMU_DEVICE_FLAG_PASID_SUP) != 0);
	141	return false;
	142	}
	143
	144	pasid_limit = min_t(unsigned int,
	145	(unsigned int)1 << kfd->device_info->max_pasid_bits,
	146	iommu_info.max_pasids);
	147	/*
	148	* last pasid is used for kernel queues doorbells
	149	* in the future the last pasid might be used for a kernel thread.
	150	*/
	151	pasid_limit = min_t(unsigned int,
	152	pasid_limit,
	153	kfd->doorbell_process_limit - 1);
	154
	155	err = amd_iommu_init_device(kfd->pdev, pasid_limit);
	156	if (err < 0) {
	157	dev_err(kfd_device, "error initializing iommu device\n");
	158	return false;
	159	}
	160
	161	if (!kfd_set_pasid_limit(pasid_limit)) {
	162	dev_err(kfd_device, "error setting pasid limit\n");
	163	amd_iommu_free_device(kfd->pdev);
	164	return false;
	165	}
	166
	167	return true;
	168	}
	169
	170	static void iommu_pasid_shutdown_callback(struct pci_dev *pdev, int pasid)
	171	{
	172	struct kfd_dev *dev = kfd_device_by_pci_dev(pdev);
	173
	174	if (dev)
	175	kfd_unbind_process_from_device(dev, pasid);
	176	}
	177
4a488a7a OG	178	bool kgd2kfd_device_init(struct kfd_dev *kfd,
	179	const struct kgd2kfd_shared_resources *gpu_resources)
	180	{
19f6d2a6 OG	181	unsigned int size;
19f6d2a6 OG	182
4a488a7a OG	183	kfd->shared_resources = *gpu_resources;
4a488a7a OG	184
19f6d2a6	185	/* calculate max size of mqds needed for queues */
b8cbab04 OG	186	size = max_num_of_queues_per_device *
b8cbab04 OG	187	kfd->device_info->mqd_size_aligned;
19f6d2a6	188
e18e794e OG	189	/*
	190	* calculate max size of runlist packet.
	191	* There can be only 2 packets at once
	192	*/
b3869b17 DA	193	size += (KFD_MAX_NUM_OF_PROCESSES * sizeof(struct pm4_map_process) +
b3869b17 DA	194	max_num_of_queues_per_device *
e18e794e OG	195	sizeof(struct pm4_map_queues) + sizeof(struct pm4_runlist)) * 2;
	196
	197	/* Add size of HIQ & DIQ */
	198	size += KFD_KERNEL_QUEUE_SIZE * 2;
	199
	200	/* add another 512KB for all other allocations on gart (HPD, fences) */
19f6d2a6 OG	201	size += 512 * 1024;
19f6d2a6 OG	202
73a1da0b OG	203	if (kfd2kgd->init_gtt_mem_allocation(kfd->kgd, size, &kfd->gtt_mem,
73a1da0b OG	204	&kfd->gtt_start_gpu_addr, &kfd->gtt_start_cpu_ptr)) {
19f6d2a6	205	dev_err(kfd_device,
e18e794e OG	206	"Could not allocate %d bytes for device (%x:%x)\n",
e18e794e OG	207	size, kfd->pdev->vendor, kfd->pdev->device);
19f6d2a6 OG	208	goto out;
	209	}
	210
e18e794e OG	211	dev_info(kfd_device,
	212	"Allocated %d bytes on gart for device(%x:%x)\n",
	213	size, kfd->pdev->vendor, kfd->pdev->device);
	214
73a1da0b OG	215	/* Initialize GTT sa with 512 byte chunk size */
	216	if (kfd_gtt_sa_init(kfd, size, 512) != 0) {
	217	dev_err(kfd_device,
	218	"Error initializing gtt sub-allocator\n");
	219	goto kfd_gtt_sa_init_error;
	220	}
	221
19f6d2a6 OG	222	kfd_doorbell_init(kfd);
	223
	224	if (kfd_topology_add_device(kfd) != 0) {
	225	dev_err(kfd_device,
	226	"Error adding device (%x:%x) to topology\n",
	227	kfd->pdev->vendor, kfd->pdev->device);
	228	goto kfd_topology_add_device_error;
	229	}
	230
b17f068a OG	231	if (!device_iommu_pasid_init(kfd)) {
	232	dev_err(kfd_device,
	233	"Error initializing iommuv2 for device (%x:%x)\n",
	234	kfd->pdev->vendor, kfd->pdev->device);
	235	goto device_iommu_pasid_error;
	236	}
	237	amd_iommu_set_invalidate_ctx_cb(kfd->pdev,
	238	iommu_pasid_shutdown_callback);
5b5c4e40	239
64c7f8cf BG	240	kfd->dqm = device_queue_manager_init(kfd);
	241	if (!kfd->dqm) {
	242	dev_err(kfd_device,
	243	"Error initializing queue manager for device (%x:%x)\n",
	244	kfd->pdev->vendor, kfd->pdev->device);
	245	goto device_queue_manager_error;
	246	}
	247
45c9a5e4	248	if (kfd->dqm->ops.start(kfd->dqm) != 0) {
64c7f8cf BG	249	dev_err(kfd_device,
	250	"Error starting queuen manager for device (%x:%x)\n",
	251	kfd->pdev->vendor, kfd->pdev->device);
	252	goto dqm_start_error;
	253	}
	254
4a488a7a OG	255	kfd->init_complete = true;
	256	dev_info(kfd_device, "added device (%x:%x)\n", kfd->pdev->vendor,
	257	kfd->pdev->device);
	258
64c7f8cf BG	259	pr_debug("kfd: Starting kfd with the following scheduling policy %d\n",
	260	sched_policy);
	261
19f6d2a6 OG	262	goto out;
19f6d2a6 OG	263
64c7f8cf BG	264	dqm_start_error:
	265	device_queue_manager_uninit(kfd->dqm);
	266	device_queue_manager_error:
	267	amd_iommu_free_device(kfd->pdev);
b17f068a OG	268	device_iommu_pasid_error:
b17f068a OG	269	kfd_topology_remove_device(kfd);
19f6d2a6	270	kfd_topology_add_device_error:
73a1da0b OG	271	kfd_gtt_sa_fini(kfd);
	272	kfd_gtt_sa_init_error:
	273	kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
19f6d2a6 OG	274	dev_err(kfd_device,
	275	"device (%x:%x) NOT added due to errors\n",
	276	kfd->pdev->vendor, kfd->pdev->device);
	277	out:
	278	return kfd->init_complete;
4a488a7a OG	279	}
	280
	281	void kgd2kfd_device_exit(struct kfd_dev *kfd)
	282	{
b17f068a	283	if (kfd->init_complete) {
64c7f8cf	284	device_queue_manager_uninit(kfd->dqm);
b17f068a OG	285	amd_iommu_free_device(kfd->pdev);
b17f068a OG	286	kfd_topology_remove_device(kfd);
73a1da0b OG	287	kfd_gtt_sa_fini(kfd);
73a1da0b OG	288	kfd2kgd->free_gtt_mem(kfd->kgd, kfd->gtt_mem);
b17f068a	289	}
5b5c4e40	290
4a488a7a OG	291	kfree(kfd);
	292	}
	293
	294	void kgd2kfd_suspend(struct kfd_dev *kfd)
	295	{
	296	BUG_ON(kfd == NULL);
b17f068a	297
64c7f8cf	298	if (kfd->init_complete) {
45c9a5e4	299	kfd->dqm->ops.stop(kfd->dqm);
abc9d3e3	300	amd_iommu_set_invalidate_ctx_cb(kfd->pdev, NULL);
b17f068a	301	amd_iommu_free_device(kfd->pdev);
64c7f8cf	302	}
4a488a7a OG	303	}
	304
	305	int kgd2kfd_resume(struct kfd_dev *kfd)
	306	{
b17f068a OG	307	unsigned int pasid_limit;
	308	int err;
	309
4a488a7a OG	310	BUG_ON(kfd == NULL);
4a488a7a OG	311
b17f068a OG	312	pasid_limit = kfd_get_pasid_limit();
	313
	314	if (kfd->init_complete) {
	315	err = amd_iommu_init_device(kfd->pdev, pasid_limit);
	316	if (err < 0)
	317	return -ENXIO;
	318	amd_iommu_set_invalidate_ctx_cb(kfd->pdev,
	319	iommu_pasid_shutdown_callback);
45c9a5e4	320	kfd->dqm->ops.start(kfd->dqm);
b17f068a OG	321	}
b17f068a OG	322
4a488a7a OG	323	return 0;
	324	}
	325
b3f5e6b4 AL	326	/* This is called directly from KGD at ISR. */
b3f5e6b4 AL	327	void kgd2kfd_interrupt(struct kfd_dev kfd, const void ih_ring_entry)
4a488a7a	328	{
6ee0ad2a	329	/* Process interrupts / schedule work as necessary */
4a488a7a	330	}
6e81090b OG	331
	332	static int kfd_gtt_sa_init(struct kfd_dev *kfd, unsigned int buf_size,
	333	unsigned int chunk_size)
	334	{
	335	unsigned int num_of_bits;
	336
	337	BUG_ON(!kfd);
	338	BUG_ON(!kfd->gtt_mem);
	339	BUG_ON(buf_size < chunk_size);
	340	BUG_ON(buf_size == 0);
	341	BUG_ON(chunk_size == 0);
	342
	343	kfd->gtt_sa_chunk_size = chunk_size;
	344	kfd->gtt_sa_num_of_chunks = buf_size / chunk_size;
	345
	346	num_of_bits = kfd->gtt_sa_num_of_chunks / BITS_PER_BYTE;
	347	BUG_ON(num_of_bits == 0);
	348
	349	kfd->gtt_sa_bitmap = kzalloc(num_of_bits, GFP_KERNEL);
	350
	351	if (!kfd->gtt_sa_bitmap)
	352	return -ENOMEM;
	353
	354	pr_debug("kfd: gtt_sa_num_of_chunks = %d, gtt_sa_bitmap = %p\n",
	355	kfd->gtt_sa_num_of_chunks, kfd->gtt_sa_bitmap);
	356
	357	mutex_init(&kfd->gtt_sa_lock);
	358
	359	return 0;
	360
	361	}
	362
	363	static void kfd_gtt_sa_fini(struct kfd_dev *kfd)
	364	{
	365	mutex_destroy(&kfd->gtt_sa_lock);
	366	kfree(kfd->gtt_sa_bitmap);
	367	}
	368
	369	static inline uint64_t kfd_gtt_sa_calc_gpu_addr(uint64_t start_addr,
	370	unsigned int bit_num,
	371	unsigned int chunk_size)
	372	{
	373	return start_addr + bit_num * chunk_size;
	374	}
	375
	376	static inline uint32_t kfd_gtt_sa_calc_cpu_addr(void start_addr,
	377	unsigned int bit_num,
	378	unsigned int chunk_size)
	379	{
	380	return (uint32_t ) ((uint64_t) start_addr + bit_num chunk_size);
	381	}
	382
	383	int kfd_gtt_sa_allocate(struct kfd_dev *kfd, unsigned int size,
	384	struct kfd_mem_obj **mem_obj)
	385	{
	386	unsigned int found, start_search, cur_size;
	387
	388	BUG_ON(!kfd);
	389
	390	if (size == 0)
	391	return -EINVAL;
	392
	393	if (size > kfd->gtt_sa_num_of_chunks * kfd->gtt_sa_chunk_size)
	394	return -ENOMEM;
395
396	*mem_obj = kmalloc(sizeof(struct kfd_mem_obj), GFP_KERNEL);
397	if ((*mem_obj) == NULL)
398	return -ENOMEM;
399
400	pr_debug("kfd: allocated mem_obj = %p for size = %d\n", *mem_obj, size);
401
402	start_search = 0;
403
404	mutex_lock(&kfd->gtt_sa_lock);
405
406	kfd_gtt_restart_search:
407	/* Find the first chunk that is free */
408	found = find_next_zero_bit(kfd->gtt_sa_bitmap,
409	kfd->gtt_sa_num_of_chunks,
410	start_search);
411
412	pr_debug("kfd: found = %d\n", found);
413
414	/* If there wasn't any free chunk, bail out */
415	if (found == kfd->gtt_sa_num_of_chunks)
416	goto kfd_gtt_no_free_chunk;
417
418	/* Update fields of mem_obj */
419	(*mem_obj)->range_start = found;
420	(*mem_obj)->range_end = found;
421	(*mem_obj)->gpu_addr = kfd_gtt_sa_calc_gpu_addr(
422	kfd->gtt_start_gpu_addr,
423	found,
424	kfd->gtt_sa_chunk_size);
425	(*mem_obj)->cpu_ptr = kfd_gtt_sa_calc_cpu_addr(
426	kfd->gtt_start_cpu_ptr,
427	found,
428	kfd->gtt_sa_chunk_size);
429
430	pr_debug("kfd: gpu_addr = %p, cpu_addr = %p\n",
431	(uint64_t ) (mem_obj)->gpu_addr, (*mem_obj)->cpu_ptr);
432
433	/* If we need only one chunk, mark it as allocated and get out */
434	if (size <= kfd->gtt_sa_chunk_size) {
435	pr_debug("kfd: single bit\n");
436	set_bit(found, kfd->gtt_sa_bitmap);
437	goto kfd_gtt_out;
438	}
439
440	/* Otherwise, try to see if we have enough contiguous chunks */
441	cur_size = size - kfd->gtt_sa_chunk_size;
442	do {
443	(*mem_obj)->range_end =
444	find_next_zero_bit(kfd->gtt_sa_bitmap,
445	kfd->gtt_sa_num_of_chunks, ++found);
446	/*
447	* If next free chunk is not contiguous than we need to
448	* restart our search from the last free chunk we found (which
449	* wasn't contiguous to the previous ones
450	*/
451	if ((*mem_obj)->range_end != found) {
452	start_search = found;
453	goto kfd_gtt_restart_search;
454	}
455
456	/*
457	* If we reached end of buffer, bail out with error
458	*/
459	if (found == kfd->gtt_sa_num_of_chunks)
460	goto kfd_gtt_no_free_chunk;
461
462	/* Check if we don't need another chunk */
463	if (cur_size <= kfd->gtt_sa_chunk_size)
464	cur_size = 0;
465	else
466	cur_size -= kfd->gtt_sa_chunk_size;
467
468	} while (cur_size > 0);
469
470	pr_debug("kfd: range_start = %d, range_end = %d\n",
471	(mem_obj)->range_start, (mem_obj)->range_end);
472
473	/* Mark the chunks as allocated */
474	for (found = (*mem_obj)->range_start;
475	found <= (*mem_obj)->range_end;
476	found++)
477	set_bit(found, kfd->gtt_sa_bitmap);
478
479	kfd_gtt_out:
480	mutex_unlock(&kfd->gtt_sa_lock);
481	return 0;
482
483	kfd_gtt_no_free_chunk:
484	pr_debug("kfd: allocation failed with mem_obj = %p\n", mem_obj);
485	mutex_unlock(&kfd->gtt_sa_lock);
486	kfree(mem_obj);
487	return -ENOMEM;
488	}
489
490	int kfd_gtt_sa_free(struct kfd_dev kfd, struct kfd_mem_obj mem_obj)
491	{
492	unsigned int bit;
493
494	BUG_ON(!kfd);
9216ed29 OG	495
	496	/* Act like kfree when trying to free a NULL object */
	497	if (!mem_obj)
	498	return 0;
6e81090b OG	499
	500	pr_debug("kfd: free mem_obj = %p, range_start = %d, range_end = %d\n",
	501	mem_obj, mem_obj->range_start, mem_obj->range_end);
	502
	503	mutex_lock(&kfd->gtt_sa_lock);
	504
	505	/* Mark the chunks as free */
	506	for (bit = mem_obj->range_start;
	507	bit <= mem_obj->range_end;
	508	bit++)
	509	clear_bit(bit, kfd->gtt_sa_bitmap);
	510
	511	mutex_unlock(&kfd->gtt_sa_lock);
	512
	513	kfree(mem_obj);
	514	return 0;
	515	}