1 files changed, 522 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
new file mode 100644
index 000000000..ca7f2d3af
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
@@ -0,0 +1,522 @@
+/*
+ * 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, const struct kfd2kgd_calls *f2g)
+{
+	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;
+	kfd->kfd2kgd = f2g;
+
+	mutex_init(&kfd->doorbell_mutex);
+	memset(&kfd->doorbell_available_index, 0,
+		sizeof(kfd->doorbell_available_index));
+
+	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 (kfd->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:
+	kfd->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);
+		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;
+}