1 files changed, 584 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c
new file mode 100644
index 000000000000..b1a6eb349bb3
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_packet_manager.c
@@ -0,0 +1,584 @@
+// SPDX-License-Identifier: GPL-2.0 OR MIT
+/*
+ * Copyright 2014-2022 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/slab.h>
+#include <linux/mutex.h>
+#include "kfd_device_queue_manager.h"
+#include "kfd_kernel_queue.h"
+#include "kfd_priv.h"
+
+#define OVER_SUBSCRIPTION_PROCESS_COUNT (1 << 0)
+#define OVER_SUBSCRIPTION_COMPUTE_QUEUE_COUNT (1 << 1)
+#define OVER_SUBSCRIPTION_GWS_QUEUE_COUNT (1 << 2)
+#define OVER_SUBSCRIPTION_XNACK_CONFLICT (1 << 3)
+
+static inline void inc_wptr(unsigned int *wptr, unsigned int increment_bytes,
+				unsigned int buffer_size_bytes)
+{
+	unsigned int temp = *wptr + increment_bytes / sizeof(uint32_t);
+
+	WARN((temp * sizeof(uint32_t)) > buffer_size_bytes,
+	     "Runlist IB overflow");
+	*wptr = temp;
+}
+
+static void pm_calc_rlib_size(struct packet_manager *pm,
+				unsigned int *rlib_size,
+				int *over_subscription,
+				int xnack_conflict)
+{
+	unsigned int process_count, queue_count, compute_queue_count, gws_queue_count;
+	unsigned int map_queue_size;
+	unsigned int max_proc_per_quantum = 1;
+	struct kfd_node *node = pm->dqm->dev;
+	struct device *dev = node->adev->dev;
+
+	process_count = pm->dqm->processes_count;
+	queue_count = pm->dqm->active_queue_count;
+	compute_queue_count = pm->dqm->active_cp_queue_count;
+	gws_queue_count = pm->dqm->gws_queue_count;
+
+	/* check if there is over subscription
+	 * Note: the arbitration between the number of VMIDs and
+	 * hws_max_conc_proc has been done in
+	 * kgd2kfd_device_init().
+	 */
+	*over_subscription = 0;
+
+	if (node->max_proc_per_quantum > 1)
+		max_proc_per_quantum = node->max_proc_per_quantum;
+
+	if (process_count > max_proc_per_quantum)
+		*over_subscription |= OVER_SUBSCRIPTION_PROCESS_COUNT;
+	if (compute_queue_count > get_cp_queues_num(pm->dqm))
+		*over_subscription |= OVER_SUBSCRIPTION_COMPUTE_QUEUE_COUNT;
+	if (gws_queue_count > 1)
+		*over_subscription |= OVER_SUBSCRIPTION_GWS_QUEUE_COUNT;
+	if (xnack_conflict && (node->adev->gmc.xnack_flags & AMDGPU_GMC_XNACK_FLAG_CHAIN))
+		*over_subscription |= OVER_SUBSCRIPTION_XNACK_CONFLICT;
+
+	if (*over_subscription)
+		dev_dbg(dev, "Over subscribed runlist\n");
+
+	map_queue_size = pm->pmf->map_queues_size;
+	/* calculate run list ib allocation size */
+	*rlib_size = process_count * pm->pmf->map_process_size +
+		     queue_count * map_queue_size;
+
+	/*
+	 * Increase the allocation size in case we need a chained run list
+	 * when over subscription
+	 */
+	if (*over_subscription)
+		*rlib_size += pm->pmf->runlist_size;
+
+	dev_dbg(dev, "runlist ib size %d\n", *rlib_size);
+}
+
+static int pm_allocate_runlist_ib(struct packet_manager *pm,
+				unsigned int **rl_buffer,
+				uint64_t *rl_gpu_buffer,
+				unsigned int *rl_buffer_size,
+				int *is_over_subscription,
+				int xnack_conflict)
+{
+	struct kfd_node *node = pm->dqm->dev;
+	struct device *dev = node->adev->dev;
+	int retval;
+
+	if (WARN_ON(pm->allocated))
+		return -EINVAL;
+
+	pm_calc_rlib_size(pm, rl_buffer_size, is_over_subscription,
+				xnack_conflict);
+
+	mutex_lock(&pm->lock);
+
+	retval = kfd_gtt_sa_allocate(node, *rl_buffer_size, &pm->ib_buffer_obj);
+
+	if (retval) {
+		dev_err(dev, "Failed to allocate runlist IB\n");
+		goto out;
+	}
+
+	*(void **)rl_buffer = pm->ib_buffer_obj->cpu_ptr;
+	*rl_gpu_buffer = pm->ib_buffer_obj->gpu_addr;
+
+	memset(*rl_buffer, 0, *rl_buffer_size);
+	pm->allocated = true;
+
+out:
+	mutex_unlock(&pm->lock);
+	return retval;
+}
+
+static int pm_create_runlist_ib(struct packet_manager *pm,
+				struct list_head *queues,
+				uint64_t *rl_gpu_addr,
+				size_t *rl_size_bytes)
+{
+	unsigned int alloc_size_bytes;
+	unsigned int *rl_buffer, rl_wptr, i;
+	struct kfd_node *node = pm->dqm->dev;
+	struct device *dev = node->adev->dev;
+	int retval, processes_mapped;
+	struct device_process_node *cur;
+	struct qcm_process_device *qpd;
+	struct queue *q;
+	struct kernel_queue *kq;
+	int is_over_subscription;
+	int xnack_enabled = -1;
+	bool xnack_conflict = 0;
+
+	rl_wptr = retval = processes_mapped = 0;
+
+	/* Check if processes set different xnack modes */
+	list_for_each_entry(cur, queues, list) {
+		qpd = cur->qpd;
+		if (xnack_enabled < 0)
+			/* First process */
+			xnack_enabled = qpd->pqm->process->xnack_enabled;
+		else if (qpd->pqm->process->xnack_enabled != xnack_enabled) {
+			/* Found a process with a different xnack mode */
+			xnack_conflict = 1;
+			break;
+		}
+	}
+
+	retval = pm_allocate_runlist_ib(pm, &rl_buffer, rl_gpu_addr,
+				&alloc_size_bytes, &is_over_subscription,
+				xnack_conflict);
+	if (retval)
+		return retval;
+
+	*rl_size_bytes = alloc_size_bytes;
+	pm->ib_size_bytes = alloc_size_bytes;
+
+	dev_dbg(dev, "Building runlist ib process count: %d queues count %d\n",
+		pm->dqm->processes_count, pm->dqm->active_queue_count);
+
+build_runlist_ib:
+	/* build the run list ib packet */
+	list_for_each_entry(cur, queues, list) {
+		qpd = cur->qpd;
+		/* group processes with the same xnack mode together */
+		if (qpd->pqm->process->xnack_enabled != xnack_enabled)
+			continue;
+		/* build map process packet */
+		if (processes_mapped >= pm->dqm->processes_count) {
+			dev_dbg(dev, "Not enough space left in runlist IB\n");
+			pm_release_ib(pm);
+			return -ENOMEM;
+		}
+
+		retval = pm->pmf->map_process(pm, &rl_buffer[rl_wptr], qpd);
+		if (retval)
+			return retval;
+
+		processes_mapped++;
+		inc_wptr(&rl_wptr, pm->pmf->map_process_size,
+				alloc_size_bytes);
+
+		list_for_each_entry(kq, &qpd->priv_queue_list, list) {
+			if (!kq->queue->properties.is_active)
+				continue;
+
+			dev_dbg(dev,
+				"static_queue, mapping kernel q %d, is debug status %d\n",
+				kq->queue->queue, qpd->is_debug);
+
+			retval = pm->pmf->map_queues(pm,
+						&rl_buffer[rl_wptr],
+						kq->queue,
+						qpd->is_debug);
+			if (retval)
+				return retval;
+
+			inc_wptr(&rl_wptr,
+				pm->pmf->map_queues_size,
+				alloc_size_bytes);
+		}
+
+		list_for_each_entry(q, &qpd->queues_list, list) {
+			if (!q->properties.is_active)
+				continue;
+
+			dev_dbg(dev,
+				"static_queue, mapping user queue %d, is debug status %d\n",
+				q->queue, qpd->is_debug);
+
+			retval = pm->pmf->map_queues(pm,
+						&rl_buffer[rl_wptr],
+						q,
+						qpd->is_debug);
+
+			if (retval)
+				return retval;
+
+			inc_wptr(&rl_wptr,
+				pm->pmf->map_queues_size,
+				alloc_size_bytes);
+		}
+	}
+	if (xnack_conflict) {
+		/* pick up processes with the other xnack mode */
+		xnack_enabled = !xnack_enabled;
+		xnack_conflict = 0;
+		goto build_runlist_ib;
+	}
+
+	dev_dbg(dev, "Finished map process and queues to runlist\n");
+
+	if (is_over_subscription) {
+		if (!pm->is_over_subscription)
+			dev_warn(dev, "Runlist is getting oversubscribed due to%s%s%s%s. Expect reduced ROCm performance.\n",
+				is_over_subscription & OVER_SUBSCRIPTION_PROCESS_COUNT ?
+				" too many processes" : "",
+				is_over_subscription & OVER_SUBSCRIPTION_COMPUTE_QUEUE_COUNT ?
+				" too many queues" : "",
+				is_over_subscription & OVER_SUBSCRIPTION_GWS_QUEUE_COUNT ?
+				" multiple processes using cooperative launch" : "",
+				is_over_subscription & OVER_SUBSCRIPTION_XNACK_CONFLICT ?
+				" xnack on/off processes mixed on gfx9" : "");
+
+		retval = pm->pmf->runlist(pm, &rl_buffer[rl_wptr],
+					*rl_gpu_addr,
+					alloc_size_bytes / sizeof(uint32_t),
+					true);
+	}
+	pm->is_over_subscription = !!is_over_subscription;
+
+	for (i = 0; i < alloc_size_bytes / sizeof(uint32_t); i++)
+		pr_debug("0x%2X ", rl_buffer[i]);
+	pr_debug("\n");
+
+	return retval;
+}
+
+int pm_init(struct packet_manager *pm, struct device_queue_manager *dqm)
+{
+	switch (dqm->dev->adev->asic_type) {
+	case CHIP_KAVERI:
+	case CHIP_HAWAII:
+		/* PM4 packet structures on CIK are the same as on VI */
+	case CHIP_CARRIZO:
+	case CHIP_TONGA:
+	case CHIP_FIJI:
+	case CHIP_POLARIS10:
+	case CHIP_POLARIS11:
+	case CHIP_POLARIS12:
+	case CHIP_VEGAM:
+		pm->pmf = &kfd_vi_pm_funcs;
+		break;
+	default:
+		if (KFD_GC_VERSION(dqm->dev) == IP_VERSION(9, 4, 2) ||
+		    KFD_GC_VERSION(dqm->dev) == IP_VERSION(9, 4, 3) ||
+		    KFD_GC_VERSION(dqm->dev) == IP_VERSION(9, 4, 4) ||
+		    KFD_GC_VERSION(dqm->dev) == IP_VERSION(9, 5, 0))
+			pm->pmf = &kfd_aldebaran_pm_funcs;
+		else if (KFD_GC_VERSION(dqm->dev) >= IP_VERSION(9, 0, 1))
+			pm->pmf = &kfd_v9_pm_funcs;
+		else {
+			WARN(1, "Unexpected ASIC family %u",
+			     dqm->dev->adev->asic_type);
+			return -EINVAL;
+		}
+	}
+
+	pm->dqm = dqm;
+	mutex_init(&pm->lock);
+	pm->priv_queue = kernel_queue_init(dqm->dev, KFD_QUEUE_TYPE_HIQ);
+	if (!pm->priv_queue) {
+		mutex_destroy(&pm->lock);
+		return -ENOMEM;
+	}
+	pm->allocated = false;
+
+	return 0;
+}
+
+void pm_uninit(struct packet_manager *pm)
+{
+	mutex_destroy(&pm->lock);
+	kernel_queue_uninit(pm->priv_queue);
+	pm->priv_queue = NULL;
+}
+
+int pm_send_set_resources(struct packet_manager *pm,
+				struct scheduling_resources *res)
+{
+	struct kfd_node *node = pm->dqm->dev;
+	struct device *dev = node->adev->dev;
+	uint32_t *buffer, size;
+	int retval = 0;
+
+	size = pm->pmf->set_resources_size;
+	mutex_lock(&pm->lock);
+	kq_acquire_packet_buffer(pm->priv_queue,
+					size / sizeof(uint32_t),
+					(unsigned int **)&buffer);
+	if (!buffer) {
+		dev_err(dev, "Failed to allocate buffer on kernel queue\n");
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	retval = pm->pmf->set_resources(pm, buffer, res);
+	if (!retval)
+		retval = kq_submit_packet(pm->priv_queue);
+	else
+		kq_rollback_packet(pm->priv_queue);
+
+out:
+	mutex_unlock(&pm->lock);
+
+	return retval;
+}
+
+int pm_send_runlist(struct packet_manager *pm, struct list_head *dqm_queues)
+{
+	uint64_t rl_gpu_ib_addr;
+	uint32_t *rl_buffer;
+	size_t rl_ib_size, packet_size_dwords;
+	int retval;
+
+	retval = pm_create_runlist_ib(pm, dqm_queues, &rl_gpu_ib_addr,
+					&rl_ib_size);
+	if (retval)
+		goto fail_create_runlist_ib;
+
+	pr_debug("runlist IB address: 0x%llX\n", rl_gpu_ib_addr);
+
+	packet_size_dwords = pm->pmf->runlist_size / sizeof(uint32_t);
+	mutex_lock(&pm->lock);
+
+	retval = kq_acquire_packet_buffer(pm->priv_queue,
+					packet_size_dwords, &rl_buffer);
+	if (retval)
+		goto fail_acquire_packet_buffer;
+
+	retval = pm->pmf->runlist(pm, rl_buffer, rl_gpu_ib_addr,
+					rl_ib_size / sizeof(uint32_t), false);
+	if (retval)
+		goto fail_create_runlist;
+
+	retval = kq_submit_packet(pm->priv_queue);
+
+	mutex_unlock(&pm->lock);
+
+	return retval;
+
+fail_create_runlist:
+	kq_rollback_packet(pm->priv_queue);
+fail_acquire_packet_buffer:
+	mutex_unlock(&pm->lock);
+fail_create_runlist_ib:
+	pm_release_ib(pm);
+	return retval;
+}
+
+int pm_send_query_status(struct packet_manager *pm, uint64_t fence_address,
+			uint64_t fence_value)
+{
+	struct kfd_node *node = pm->dqm->dev;
+	struct device *dev = node->adev->dev;
+	uint32_t *buffer, size;
+	int retval = 0;
+
+	if (WARN_ON(!fence_address))
+		return -EFAULT;
+
+	size = pm->pmf->query_status_size;
+	mutex_lock(&pm->lock);
+	kq_acquire_packet_buffer(pm->priv_queue,
+			size / sizeof(uint32_t), (unsigned int **)&buffer);
+	if (!buffer) {
+		dev_err(dev, "Failed to allocate buffer on kernel queue\n");
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	retval = pm->pmf->query_status(pm, buffer, fence_address, fence_value);
+	if (!retval)
+		retval = kq_submit_packet(pm->priv_queue);
+	else
+		kq_rollback_packet(pm->priv_queue);
+
+out:
+	mutex_unlock(&pm->lock);
+	return retval;
+}
+
+/* pm_config_dequeue_wait_counts: Configure dequeue timer Wait Counts
+ *  by writing to CP_IQ_WAIT_TIME2 registers.
+ *
+ *  @cmd: See emum kfd_config_dequeue_wait_counts_cmd definition
+ *  @value: Depends on the cmd. This parameter is unused for
+ *    KFD_DEQUEUE_WAIT_INIT and KFD_DEQUEUE_WAIT_RESET. For
+ *    KFD_DEQUEUE_WAIT_SET_SCH_WAVE it holds value to be set
+ *
+ */
+int pm_config_dequeue_wait_counts(struct packet_manager *pm,
+		enum kfd_config_dequeue_wait_counts_cmd cmd,
+		uint32_t value)
+{
+	struct kfd_node *node = pm->dqm->dev;
+	struct device *dev = node->adev->dev;
+	int retval = 0;
+	uint32_t *buffer, size;
+
+	if (!pm->pmf->config_dequeue_wait_counts ||
+	    !pm->pmf->config_dequeue_wait_counts_size)
+		return 0;
+
+	if (cmd == KFD_DEQUEUE_WAIT_INIT && (KFD_GC_VERSION(pm->dqm->dev) < IP_VERSION(9, 4, 1) ||
+	   KFD_GC_VERSION(pm->dqm->dev) >= IP_VERSION(10, 0, 0)))
+		return 0;
+
+	size = pm->pmf->config_dequeue_wait_counts_size;
+
+	mutex_lock(&pm->lock);
+
+	if (size) {
+		kq_acquire_packet_buffer(pm->priv_queue,
+			size / sizeof(uint32_t),
+			(unsigned int **)&buffer);
+
+		if (!buffer) {
+			dev_err(dev,
+				"Failed to allocate buffer on kernel queue\n");
+			retval = -ENOMEM;
+			goto out;
+		}
+
+		retval = pm->pmf->config_dequeue_wait_counts(pm, buffer,
+							     cmd, value);
+		if (!retval) {
+			retval = kq_submit_packet(pm->priv_queue);
+
+			/* If default value is modified, cache that in dqm->wait_times */
+			if (!retval && cmd == KFD_DEQUEUE_WAIT_INIT)
+				update_dqm_wait_times(pm->dqm);
+		} else {
+			kq_rollback_packet(pm->priv_queue);
+		}
+	}
+out:
+	mutex_unlock(&pm->lock);
+	return retval;
+}
+
+int pm_send_unmap_queue(struct packet_manager *pm,
+			enum kfd_unmap_queues_filter filter,
+			uint32_t filter_param, bool reset)
+{
+	struct kfd_node *node = pm->dqm->dev;
+	struct device *dev = node->adev->dev;
+	uint32_t *buffer, size;
+	int retval = 0;
+
+	size = pm->pmf->unmap_queues_size;
+	mutex_lock(&pm->lock);
+	kq_acquire_packet_buffer(pm->priv_queue,
+			size / sizeof(uint32_t), (unsigned int **)&buffer);
+	if (!buffer) {
+		dev_err(dev, "Failed to allocate buffer on kernel queue\n");
+		retval = -ENOMEM;
+		goto out;
+	}
+
+	retval = pm->pmf->unmap_queues(pm, buffer, filter, filter_param, reset);
+	if (!retval)
+		retval = kq_submit_packet(pm->priv_queue);
+	else
+		kq_rollback_packet(pm->priv_queue);
+
+out:
+	mutex_unlock(&pm->lock);
+	return retval;
+}
+
+void pm_release_ib(struct packet_manager *pm)
+{
+	mutex_lock(&pm->lock);
+	if (pm->allocated) {
+		kfd_gtt_sa_free(pm->dqm->dev, pm->ib_buffer_obj);
+		pm->allocated = false;
+	}
+	mutex_unlock(&pm->lock);
+}
+
+#if defined(CONFIG_DEBUG_FS)
+
+int pm_debugfs_runlist(struct seq_file *m, void *data)
+{
+	struct packet_manager *pm = data;
+
+	mutex_lock(&pm->lock);
+
+	if (!pm->allocated) {
+		seq_puts(m, "  No active runlist\n");
+		goto out;
+	}
+
+	seq_hex_dump(m, "  ", DUMP_PREFIX_OFFSET, 32, 4,
+		     pm->ib_buffer_obj->cpu_ptr, pm->ib_size_bytes, false);
+
+out:
+	mutex_unlock(&pm->lock);
+	return 0;
+}
+
+int pm_debugfs_hang_hws(struct packet_manager *pm)
+{
+	struct kfd_node *node = pm->dqm->dev;
+	struct device *dev = node->adev->dev;
+	uint32_t *buffer, size;
+	int r = 0;
+
+	if (!pm->priv_queue)
+		return -EAGAIN;
+
+	size = pm->pmf->query_status_size;
+	mutex_lock(&pm->lock);
+	kq_acquire_packet_buffer(pm->priv_queue,
+			size / sizeof(uint32_t), (unsigned int **)&buffer);
+	if (!buffer) {
+		dev_err(dev, "Failed to allocate buffer on kernel queue\n");
+		r = -ENOMEM;
+		goto out;
+	}
+	memset(buffer, 0x55, size);
+	kq_submit_packet(pm->priv_queue);
+
+	dev_info(dev, "Submitting %x %x %x %x %x %x %x to HIQ to hang the HWS.",
+		 buffer[0], buffer[1], buffer[2], buffer[3], buffer[4],
+		 buffer[5], buffer[6]);
+out:
+	mutex_unlock(&pm->lock);
+	return r;
+}
+
+
+#endif