Adding upstream version 5.10.209.upstream/5.10.209

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 465 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
new file mode 100644
index 000000000..15ee13c3b
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -0,0 +1,465 @@
+/*
+ * Copyright 2008 Advanced Micro Devices, Inc.
+ * Copyright 2008 Red Hat Inc.
+ * Copyright 2009 Jerome Glisse.
+ *
+ * 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.
+ *
+ * Authors: Dave Airlie
+ *          Alex Deucher
+ *          Jerome Glisse
+ *          Christian König
+ */
+#include <linux/seq_file.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+
+#include <drm/amdgpu_drm.h>
+#include "amdgpu.h"
+#include "atom.h"
+
+/*
+ * Rings
+ * Most engines on the GPU are fed via ring buffers.  Ring
+ * buffers are areas of GPU accessible memory that the host
+ * writes commands into and the GPU reads commands out of.
+ * There is a rptr (read pointer) that determines where the
+ * GPU is currently reading, and a wptr (write pointer)
+ * which determines where the host has written.  When the
+ * pointers are equal, the ring is idle.  When the host
+ * writes commands to the ring buffer, it increments the
+ * wptr.  The GPU then starts fetching commands and executes
+ * them until the pointers are equal again.
+ */
+
+/**
+ * amdgpu_ring_alloc - allocate space on the ring buffer
+ *
+ * @adev: amdgpu_device pointer
+ * @ring: amdgpu_ring structure holding ring information
+ * @ndw: number of dwords to allocate in the ring buffer
+ *
+ * Allocate @ndw dwords in the ring buffer (all asics).
+ * Returns 0 on success, error on failure.
+ */
+int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw)
+{
+	/* Align requested size with padding so unlock_commit can
+	 * pad safely */
+	ndw = (ndw + ring->funcs->align_mask) & ~ring->funcs->align_mask;
+
+	/* Make sure we aren't trying to allocate more space
+	 * than the maximum for one submission
+	 */
+	if (WARN_ON_ONCE(ndw > ring->max_dw))
+		return -ENOMEM;
+
+	ring->count_dw = ndw;
+	ring->wptr_old = ring->wptr;
+
+	if (ring->funcs->begin_use)
+		ring->funcs->begin_use(ring);
+
+	return 0;
+}
+
+/** amdgpu_ring_insert_nop - insert NOP packets
+ *
+ * @ring: amdgpu_ring structure holding ring information
+ * @count: the number of NOP packets to insert
+ *
+ * This is the generic insert_nop function for rings except SDMA
+ */
+void amdgpu_ring_insert_nop(struct amdgpu_ring *ring, uint32_t count)
+{
+	int i;
+
+	for (i = 0; i < count; i++)
+		amdgpu_ring_write(ring, ring->funcs->nop);
+}
+
+/** amdgpu_ring_generic_pad_ib - pad IB with NOP packets
+ *
+ * @ring: amdgpu_ring structure holding ring information
+ * @ib: IB to add NOP packets to
+ *
+ * This is the generic pad_ib function for rings except SDMA
+ */
+void amdgpu_ring_generic_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib)
+{
+	while (ib->length_dw & ring->funcs->align_mask)
+		ib->ptr[ib->length_dw++] = ring->funcs->nop;
+}
+
+/**
+ * amdgpu_ring_commit - tell the GPU to execute the new
+ * commands on the ring buffer
+ *
+ * @adev: amdgpu_device pointer
+ * @ring: amdgpu_ring structure holding ring information
+ *
+ * Update the wptr (write pointer) to tell the GPU to
+ * execute new commands on the ring buffer (all asics).
+ */
+void amdgpu_ring_commit(struct amdgpu_ring *ring)
+{
+	uint32_t count;
+
+	/* We pad to match fetch size */
+	count = ring->funcs->align_mask + 1 -
+		(ring->wptr & ring->funcs->align_mask);
+	count %= ring->funcs->align_mask + 1;
+	ring->funcs->insert_nop(ring, count);
+
+	mb();
+	amdgpu_ring_set_wptr(ring);
+
+	if (ring->funcs->end_use)
+		ring->funcs->end_use(ring);
+}
+
+/**
+ * amdgpu_ring_undo - reset the wptr
+ *
+ * @ring: amdgpu_ring structure holding ring information
+ *
+ * Reset the driver's copy of the wptr (all asics).
+ */
+void amdgpu_ring_undo(struct amdgpu_ring *ring)
+{
+	ring->wptr = ring->wptr_old;
+
+	if (ring->funcs->end_use)
+		ring->funcs->end_use(ring);
+}
+
+/**
+ * amdgpu_ring_init - init driver ring struct.
+ *
+ * @adev: amdgpu_device pointer
+ * @ring: amdgpu_ring structure holding ring information
+ * @max_ndw: maximum number of dw for ring alloc
+ * @nop: nop packet for this ring
+ *
+ * Initialize the driver information for the selected ring (all asics).
+ * Returns 0 on success, error on failure.
+ */
+int amdgpu_ring_init(struct amdgpu_device *adev, struct amdgpu_ring *ring,
+		     unsigned int max_dw, struct amdgpu_irq_src *irq_src,
+		     unsigned int irq_type, unsigned int hw_prio)
+{
+	int r, i;
+	int sched_hw_submission = amdgpu_sched_hw_submission;
+	u32 *num_sched;
+	u32 hw_ip;
+
+	/* Set the hw submission limit higher for KIQ because
+	 * it's used for a number of gfx/compute tasks by both
+	 * KFD and KGD which may have outstanding fences and
+	 * it doesn't really use the gpu scheduler anyway;
+	 * KIQ tasks get submitted directly to the ring.
+	 */
+	if (ring->funcs->type == AMDGPU_RING_TYPE_KIQ)
+		sched_hw_submission = max(sched_hw_submission, 256);
+	else if (ring == &adev->sdma.instance[0].page)
+		sched_hw_submission = 256;
+
+	if (ring->adev == NULL) {
+		if (adev->num_rings >= AMDGPU_MAX_RINGS)
+			return -EINVAL;
+
+		ring->adev = adev;
+		ring->idx = adev->num_rings++;
+		adev->rings[ring->idx] = ring;
+		r = amdgpu_fence_driver_init_ring(ring, sched_hw_submission);
+		if (r)
+			return r;
+	}
+
+	r = amdgpu_device_wb_get(adev, &ring->rptr_offs);
+	if (r) {
+		dev_err(adev->dev, "(%d) ring rptr_offs wb alloc failed\n", r);
+		return r;
+	}
+
+	r = amdgpu_device_wb_get(adev, &ring->wptr_offs);
+	if (r) {
+		dev_err(adev->dev, "(%d) ring wptr_offs wb alloc failed\n", r);
+		return r;
+	}
+
+	r = amdgpu_device_wb_get(adev, &ring->fence_offs);
+	if (r) {
+		dev_err(adev->dev, "(%d) ring fence_offs wb alloc failed\n", r);
+		return r;
+	}
+
+	r = amdgpu_device_wb_get(adev, &ring->trail_fence_offs);
+	if (r) {
+		dev_err(adev->dev,
+			"(%d) ring trail_fence_offs wb alloc failed\n", r);
+		return r;
+	}
+	ring->trail_fence_gpu_addr =
+		adev->wb.gpu_addr + (ring->trail_fence_offs * 4);
+	ring->trail_fence_cpu_addr = &adev->wb.wb[ring->trail_fence_offs];
+
+	r = amdgpu_device_wb_get(adev, &ring->cond_exe_offs);
+	if (r) {
+		dev_err(adev->dev, "(%d) ring cond_exec_polling wb alloc failed\n", r);
+		return r;
+	}
+	ring->cond_exe_gpu_addr = adev->wb.gpu_addr + (ring->cond_exe_offs * 4);
+	ring->cond_exe_cpu_addr = &adev->wb.wb[ring->cond_exe_offs];
+	/* always set cond_exec_polling to CONTINUE */
+	*ring->cond_exe_cpu_addr = 1;
+
+	r = amdgpu_fence_driver_start_ring(ring, irq_src, irq_type);
+	if (r) {
+		dev_err(adev->dev, "failed initializing fences (%d).\n", r);
+		return r;
+	}
+
+	ring->ring_size = roundup_pow_of_two(max_dw * 4 * sched_hw_submission);
+
+	ring->buf_mask = (ring->ring_size / 4) - 1;
+	ring->ptr_mask = ring->funcs->support_64bit_ptrs ?
+		0xffffffffffffffff : ring->buf_mask;
+	/* Allocate ring buffer */
+	if (ring->ring_obj == NULL) {
+		r = amdgpu_bo_create_kernel(adev, ring->ring_size + ring->funcs->extra_dw, PAGE_SIZE,
+					    AMDGPU_GEM_DOMAIN_GTT,
+					    &ring->ring_obj,
+					    &ring->gpu_addr,
+					    (void **)&ring->ring);
+		if (r) {
+			dev_err(adev->dev, "(%d) ring create failed\n", r);
+			return r;
+		}
+		amdgpu_ring_clear_ring(ring);
+	}
+
+	ring->max_dw = max_dw;
+	ring->priority = DRM_SCHED_PRIORITY_NORMAL;
+	mutex_init(&ring->priority_mutex);
+
+	if (!ring->no_scheduler) {
+		hw_ip = ring->funcs->type;
+		num_sched = &adev->gpu_sched[hw_ip][hw_prio].num_scheds;
+		adev->gpu_sched[hw_ip][hw_prio].sched[(*num_sched)++] =
+			&ring->sched;
+	}
+
+	for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_COUNT; ++i)
+		atomic_set(&ring->num_jobs[i], 0);
+
+	return 0;
+}
+
+/**
+ * amdgpu_ring_fini - tear down the driver ring struct.
+ *
+ * @adev: amdgpu_device pointer
+ * @ring: amdgpu_ring structure holding ring information
+ *
+ * Tear down the driver information for the selected ring (all asics).
+ */
+void amdgpu_ring_fini(struct amdgpu_ring *ring)
+{
+
+	/* Not to finish a ring which is not initialized */
+	if (!(ring->adev) || !(ring->adev->rings[ring->idx]))
+		return;
+
+	ring->sched.ready = false;
+
+	amdgpu_device_wb_free(ring->adev, ring->rptr_offs);
+	amdgpu_device_wb_free(ring->adev, ring->wptr_offs);
+
+	amdgpu_device_wb_free(ring->adev, ring->cond_exe_offs);
+	amdgpu_device_wb_free(ring->adev, ring->fence_offs);
+
+	amdgpu_bo_free_kernel(&ring->ring_obj,
+			      &ring->gpu_addr,
+			      (void **)&ring->ring);
+
+	dma_fence_put(ring->vmid_wait);
+	ring->vmid_wait = NULL;
+	ring->me = 0;
+
+	ring->adev->rings[ring->idx] = NULL;
+}
+
+/**
+ * amdgpu_ring_emit_reg_write_reg_wait_helper - ring helper
+ *
+ * @adev: amdgpu_device pointer
+ * @reg0: register to write
+ * @reg1: register to wait on
+ * @ref: reference value to write/wait on
+ * @mask: mask to wait on
+ *
+ * Helper for rings that don't support write and wait in a
+ * single oneshot packet.
+ */
+void amdgpu_ring_emit_reg_write_reg_wait_helper(struct amdgpu_ring *ring,
+						uint32_t reg0, uint32_t reg1,
+						uint32_t ref, uint32_t mask)
+{
+	amdgpu_ring_emit_wreg(ring, reg0, ref);
+	amdgpu_ring_emit_reg_wait(ring, reg1, mask, mask);
+}
+
+/**
+ * amdgpu_ring_soft_recovery - try to soft recover a ring lockup
+ *
+ * @ring: ring to try the recovery on
+ * @vmid: VMID we try to get going again
+ * @fence: timedout fence
+ *
+ * Tries to get a ring proceeding again when it is stuck.
+ */
+bool amdgpu_ring_soft_recovery(struct amdgpu_ring *ring, unsigned int vmid,
+			       struct dma_fence *fence)
+{
+	ktime_t deadline = ktime_add_us(ktime_get(), 10000);
+
+	if (amdgpu_sriov_vf(ring->adev) || !ring->funcs->soft_recovery || !fence)
+		return false;
+
+	atomic_inc(&ring->adev->gpu_reset_counter);
+	while (!dma_fence_is_signaled(fence) &&
+	       ktime_to_ns(ktime_sub(deadline, ktime_get())) > 0)
+		ring->funcs->soft_recovery(ring, vmid);
+
+	return dma_fence_is_signaled(fence);
+}
+
+/*
+ * Debugfs info
+ */
+#if defined(CONFIG_DEBUG_FS)
+
+/* Layout of file is 12 bytes consisting of
+ * - rptr
+ * - wptr
+ * - driver's copy of wptr
+ *
+ * followed by n-words of ring data
+ */
+static ssize_t amdgpu_debugfs_ring_read(struct file *f, char __user *buf,
+					size_t size, loff_t *pos)
+{
+	struct amdgpu_ring *ring = file_inode(f)->i_private;
+	int r, i;
+	uint32_t value, result, early[3];
+
+	if (*pos & 3 || size & 3)
+		return -EINVAL;
+
+	result = 0;
+
+	if (*pos < 12) {
+		early[0] = amdgpu_ring_get_rptr(ring) & ring->buf_mask;
+		early[1] = amdgpu_ring_get_wptr(ring) & ring->buf_mask;
+		early[2] = ring->wptr & ring->buf_mask;
+		for (i = *pos / 4; i < 3 && size; i++) {
+			r = put_user(early[i], (uint32_t *)buf);
+			if (r)
+				return r;
+			buf += 4;
+			result += 4;
+			size -= 4;
+			*pos += 4;
+		}
+	}
+
+	while (size) {
+		if (*pos >= (ring->ring_size + 12))
+			return result;
+
+		value = ring->ring[(*pos - 12)/4];
+		r = put_user(value, (uint32_t*)buf);
+		if (r)
+			return r;
+		buf += 4;
+		result += 4;
+		size -= 4;
+		*pos += 4;
+	}
+
+	return result;
+}
+
+static const struct file_operations amdgpu_debugfs_ring_fops = {
+	.owner = THIS_MODULE,
+	.read = amdgpu_debugfs_ring_read,
+	.llseek = default_llseek
+};
+
+#endif
+
+int amdgpu_debugfs_ring_init(struct amdgpu_device *adev,
+			     struct amdgpu_ring *ring)
+{
+#if defined(CONFIG_DEBUG_FS)
+	struct drm_minor *minor = adev_to_drm(adev)->primary;
+	struct dentry *ent, *root = minor->debugfs_root;
+	char name[32];
+
+	sprintf(name, "amdgpu_ring_%s", ring->name);
+
+	ent = debugfs_create_file(name,
+				  S_IFREG | S_IRUGO, root,
+				  ring, &amdgpu_debugfs_ring_fops);
+	if (!ent)
+		return -ENOMEM;
+
+	i_size_write(ent->d_inode, ring->ring_size + 12);
+	ring->ent = ent;
+#endif
+	return 0;
+}
+
+/**
+ * amdgpu_ring_test_helper - tests ring and set sched readiness status
+ *
+ * @ring: ring to try the recovery on
+ *
+ * Tests ring and set sched readiness status
+ *
+ * Returns 0 on success, error on failure.
+ */
+int amdgpu_ring_test_helper(struct amdgpu_ring *ring)
+{
+	struct amdgpu_device *adev = ring->adev;
+	int r;
+
+	r = amdgpu_ring_test_ring(ring);
+	if (r)
+		DRM_DEV_ERROR(adev->dev, "ring %s test failed (%d)\n",
+			      ring->name, r);
+	else
+		DRM_DEV_DEBUG(adev->dev, "ring test on %s succeeded\n",
+			      ring->name);
+
+	ring->sched.ready = !r;
+	return r;
+}