Orange Pi5 kernel

/*
 * Copyright(c) 2011-2017 Intel Corporation. All rights reserved.
 *
 * 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 (including the next
 * paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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/debugfs.h>
#include <linux/list_sort.h>
#include "i915_drv.h"
#include "gvt.h"
 
struct mmio_diff_param {
<------>struct intel_vgpu *vgpu;
<------>int total;
<------>int diff;
<------>struct list_head diff_mmio_list;
};
 
struct diff_mmio {
<------>struct list_head node;
<------>u32 offset;
<------>u32 preg;
<------>u32 vreg;
};
 
/* Compare two diff_mmio items. */
static int mmio_offset_compare(void *priv,
<------>struct list_head *a, struct list_head *b)
{
<------>struct diff_mmio *ma;
<------>struct diff_mmio *mb;
 
<------>ma = container_of(a, struct diff_mmio, node);
<------>mb = container_of(b, struct diff_mmio, node);
<------>if (ma->offset < mb->offset)
<------><------>return -1;
<------>else if (ma->offset > mb->offset)
<------><------>return 1;
<------>return 0;
}
 
static inline int mmio_diff_handler(struct intel_gvt *gvt,
<------><------><------><------>    u32 offset, void *data)
{
<------>struct mmio_diff_param *param = data;
<------>struct diff_mmio *node;
<------>u32 preg, vreg;
 
<------>preg = intel_uncore_read_notrace(gvt->gt->uncore, _MMIO(offset));
<------>vreg = vgpu_vreg(param->vgpu, offset);
 
<------>if (preg != vreg) {
<------><------>node = kmalloc(sizeof(*node), GFP_ATOMIC);
<------><------>if (!node)
<------><------><------>return -ENOMEM;
 
<------><------>node->offset = offset;
<------><------>node->preg = preg;
<------><------>node->vreg = vreg;
<------><------>list_add(&node->node, &param->diff_mmio_list);
<------><------>param->diff++;
<------>}
<------>param->total++;
<------>return 0;
}
 
/* Show the all the different values of tracked mmio. */
static int vgpu_mmio_diff_show(struct seq_file *s, void *unused)
{
<------>struct intel_vgpu *vgpu = s->private;
<------>struct intel_gvt *gvt = vgpu->gvt;
<------>struct mmio_diff_param param = {
<------><------>.vgpu = vgpu,
<------><------>.total = 0,
<------><------>.diff = 0,
<------>};
<------>struct diff_mmio *node, *next;
 
<------>INIT_LIST_HEAD(&param.diff_mmio_list);
 
<------>mutex_lock(&gvt->lock);
<------>spin_lock_bh(&gvt->scheduler.mmio_context_lock);
 
<------>mmio_hw_access_pre(gvt->gt);
<------>/* Recognize all the diff mmios to list. */
<------>intel_gvt_for_each_tracked_mmio(gvt, mmio_diff_handler, &param);
<------>mmio_hw_access_post(gvt->gt);
 
<------>spin_unlock_bh(&gvt->scheduler.mmio_context_lock);
<------>mutex_unlock(&gvt->lock);
 
<------>/* In an ascending order by mmio offset. */
<------>list_sort(NULL, &param.diff_mmio_list, mmio_offset_compare);
 
<------>seq_printf(s, "%-8s %-8s %-8s %-8s\n", "Offset", "HW", "vGPU", "Diff");
<------>list_for_each_entry_safe(node, next, &param.diff_mmio_list, node) {
<------><------>u32 diff = node->preg ^ node->vreg;
 
<------><------>seq_printf(s, "%08x %08x %08x %*pbl\n",
<------><------><------>   node->offset, node->preg, node->vreg,
<------><------><------>   32, &diff);
<------><------>list_del(&node->node);
<------><------>kfree(node);
<------>}
<------>seq_printf(s, "Total: %d, Diff: %d\n", param.total, param.diff);
<------>return 0;
}
DEFINE_SHOW_ATTRIBUTE(vgpu_mmio_diff);
 
static int
vgpu_scan_nonprivbb_get(void *data, u64 *val)
{
<------>struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
 
<------>*val = vgpu->scan_nonprivbb;
<------>return 0;
}
 
/*
 * set/unset bit engine_id of vgpu->scan_nonprivbb to turn on/off scanning
 * of non-privileged batch buffer. e.g.
 * if vgpu->scan_nonprivbb=3, then it will scan non-privileged batch buffer
 * on engine 0 and 1.
 */
static int
vgpu_scan_nonprivbb_set(void *data, u64 val)
{
<------>struct intel_vgpu *vgpu = (struct intel_vgpu *)data;
 
<------>vgpu->scan_nonprivbb = val;
<------>return 0;
}
 
DEFINE_SIMPLE_ATTRIBUTE(vgpu_scan_nonprivbb_fops,
<------><------><------>vgpu_scan_nonprivbb_get, vgpu_scan_nonprivbb_set,
<------><------><------>"0x%llx\n");
 
/**
 * intel_gvt_debugfs_add_vgpu - register debugfs entries for a vGPU
 * @vgpu: a vGPU
 */
void intel_gvt_debugfs_add_vgpu(struct intel_vgpu *vgpu)
{
<------>char name[16] = "";
 
<------>snprintf(name, 16, "vgpu%d", vgpu->id);
<------>vgpu->debugfs = debugfs_create_dir(name, vgpu->gvt->debugfs_root);
 
<------>debugfs_create_bool("active", 0444, vgpu->debugfs, &vgpu->active);
<------>debugfs_create_file("mmio_diff", 0444, vgpu->debugfs, vgpu,
<------><------><------>    &vgpu_mmio_diff_fops);
<------>debugfs_create_file("scan_nonprivbb", 0644, vgpu->debugfs, vgpu,
<------><------><------>    &vgpu_scan_nonprivbb_fops);
}
 
/**
 * intel_gvt_debugfs_remove_vgpu - remove debugfs entries of a vGPU
 * @vgpu: a vGPU
 */
void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu)
{
<------>debugfs_remove_recursive(vgpu->debugfs);
<------>vgpu->debugfs = NULL;
}
 
/**
 * intel_gvt_debugfs_init - register gvt debugfs root entry
 * @gvt: GVT device
 */
void intel_gvt_debugfs_init(struct intel_gvt *gvt)
{
<------>struct drm_minor *minor = gvt->gt->i915->drm.primary;
 
<------>gvt->debugfs_root = debugfs_create_dir("gvt", minor->debugfs_root);
 
<------>debugfs_create_ulong("num_tracked_mmio", 0444, gvt->debugfs_root,
<------><------><------>     &gvt->mmio.num_tracked_mmio);
}
 
/**
 * intel_gvt_debugfs_clean - remove debugfs entries
 * @gvt: GVT device
 */
void intel_gvt_debugfs_clean(struct intel_gvt *gvt)
{
<------>debugfs_remove_recursive(gvt->debugfs_root);
<------>gvt->debugfs_root = NULL;
}