[PATCH 3/4] drm/i915: Move fence register tracking from i915->mm to ggtt

Chris Wilson
2019-06-13T06:20:31Z

As the fence registers only apply to regions inside the GGTT is makes
more sense that we track these as part of the i915_ggtt and not the
general mm. In the next patch, we will then pull the register locking
underneath the i915_ggtt.mutex.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
drivers/gpu/drm/i915/gem/i915_gem_mman.c | 4 +-
drivers/gpu/drm/i915/gem/i915_gem_pm.c | 2 +-
drivers/gpu/drm/i915/gt/intel_reset.c | 6 +-
drivers/gpu/drm/i915/gvt/aperture_gm.c | 7 +-
drivers/gpu/drm/i915/gvt/gvt.h | 4 +-
drivers/gpu/drm/i915/i915_debugfs.c | 42 ++++++-----
drivers/gpu/drm/i915/i915_drv.c | 3 +-
drivers/gpu/drm/i915/i915_drv.h | 28 -------
drivers/gpu/drm/i915/i915_gem.c | 52 +++----------
drivers/gpu/drm/i915/i915_gem_fence_reg.c | 90 ++++++++++++++++-------
drivers/gpu/drm/i915/i915_gem_fence_reg.h | 19 ++++-
drivers/gpu/drm/i915/i915_gem_gtt.c | 2 +
drivers/gpu/drm/i915/i915_gem_gtt.h | 14 +++-
drivers/gpu/drm/i915/i915_gpu_error.c | 6 +-
drivers/gpu/drm/i915/i915_vma.h | 2 +-
15 files changed, 144 insertions(+), 137 deletions(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_mman.c b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
index c7b9b34de01b..a8b8b9c281f1 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_mman.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_mman.c
@@ -310,9 +310,9 @@ vm_fault_t i915_gem_fault(struct vm_fault *vmf)
/* Mark as being mmapped into userspace for later revocation */
assert_rpm_wakelock_held(i915);
if (!i915_vma_set_userfault(vma) && !obj->userfault_count++)
- list_add(&obj->userfault_link, &i915->mm.userfault_list);
+ list_add(&obj->userfault_link, &i915->ggtt.userfault_list);
if (CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND)
- intel_wakeref_auto(&i915->mm.userfault_wakeref,
+ intel_wakeref_auto(&i915->ggtt.userfault_wakeref,
msecs_to_jiffies_timeout(CONFIG_DRM_I915_USERFAULT_AUTOSUSPEND));
GEM_BUG_ON(!obj->userfault_count);

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_pm.c b/drivers/gpu/drm/i915/gem/i915_gem_pm.c
index 03af78151aeb..a33f69610d6f 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_pm.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_pm.c
@@ -125,7 +125,7 @@ void i915_gem_suspend(struct drm_i915_private *i915)
{
GEM_TRACE("\n");

- intel_wakeref_auto(&i915->mm.userfault_wakeref, 0);
+ intel_wakeref_auto(&i915->ggtt.userfault_wakeref, 0);
flush_workqueue(i915->wq);

mutex_lock(&i915->drm.struct_mutex);
diff --git a/drivers/gpu/drm/i915/gt/intel_reset.c b/drivers/gpu/drm/i915/gt/intel_reset.c
index 952e11b4b5c5..3b88bbd37275 100644
--- a/drivers/gpu/drm/i915/gt/intel_reset.c
+++ b/drivers/gpu/drm/i915/gt/intel_reset.c
@@ -695,19 +695,19 @@ static void revoke_mmaps(struct drm_i915_private *i915)
{
int i;

- for (i = 0; i < i915->num_fence_regs; i++) {
+ for (i = 0; i < i915->ggtt.num_fences; i++) {
struct drm_vma_offset_node *node;
struct i915_vma *vma;
u64 vma_offset;

- vma = READ_ONCE(i915->fence_regs[i].vma);
+ vma = READ_ONCE(i915->ggtt.fence_regs[i].vma);
if (!vma)
continue;

if (!i915_vma_has_userfault(vma))
continue;

- GEM_BUG_ON(vma->fence != &i915->fence_regs[i]);
+ GEM_BUG_ON(vma->fence != &i915->ggtt.fence_regs[i]);
node = &vma->obj->base.vma_node;
vma_offset = vma->ggtt_view.partial.offset << PAGE_SHIFT;
unmap_mapping_range(i915->drm.anon_inode->i_mapping,
diff --git a/drivers/gpu/drm/i915/gvt/aperture_gm.c b/drivers/gpu/drm/i915/gvt/aperture_gm.c
index 1fa2f65c3cd1..4098902bfaeb 100644
--- a/drivers/gpu/drm/i915/gvt/aperture_gm.c
+++ b/drivers/gpu/drm/i915/gvt/aperture_gm.c
@@ -35,6 +35,7 @@
*/

#include "i915_drv.h"
+#include "i915_gem_fence_reg.h"
#include "gvt.h"

static int alloc_gm(struct intel_vgpu *vgpu, bool high_gm)
@@ -128,7 +129,7 @@ void intel_vgpu_write_fence(struct intel_vgpu *vgpu,
{
struct intel_gvt *gvt = vgpu->gvt;
struct drm_i915_private *dev_priv = gvt->dev_priv;
- struct drm_i915_fence_reg *reg;
+ struct i915_fence_reg *reg;
i915_reg_t fence_reg_lo, fence_reg_hi;

assert_rpm_wakelock_held(dev_priv);
@@ -163,7 +164,7 @@ static void free_vgpu_fence(struct intel_vgpu *vgpu)
{
struct intel_gvt *gvt = vgpu->gvt;
struct drm_i915_private *dev_priv = gvt->dev_priv;
- struct drm_i915_fence_reg *reg;
+ struct i915_fence_reg *reg;
u32 i;

if (WARN_ON(!vgpu_fence_sz(vgpu)))
@@ -187,7 +188,7 @@ static int alloc_vgpu_fence(struct intel_vgpu *vgpu)
{
struct intel_gvt *gvt = vgpu->gvt;
struct drm_i915_private *dev_priv = gvt->dev_priv;
- struct drm_i915_fence_reg *reg;
+ struct i915_fence_reg *reg;
int i;

intel_runtime_pm_get(dev_priv);
diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
index b54f2bdc13a4..dfd10cf82b65 100644
--- a/drivers/gpu/drm/i915/gvt/gvt.h
+++ b/drivers/gpu/drm/i915/gvt/gvt.h
@@ -87,7 +87,7 @@ struct intel_vgpu_gm {

/* Fences owned by a vGPU */
struct intel_vgpu_fence {
- struct drm_i915_fence_reg *regs[INTEL_GVT_MAX_NUM_FENCES];
+ struct i915_fence_reg *regs[INTEL_GVT_MAX_NUM_FENCES];
u32 base;
u32 size;
};
@@ -390,7 +390,7 @@ int intel_gvt_load_firmware(struct intel_gvt *gvt);
#define gvt_hidden_gmadr_end(gvt) (gvt_hidden_gmadr_base(gvt) \
+ gvt_hidden_sz(gvt) - 1)

-#define gvt_fence_sz(gvt) (gvt->dev_priv->num_fence_regs)
+#define gvt_fence_sz(gvt) ((gvt)->dev_priv->ggtt.num_fences)

/* Aperture/GM space definitions for vGPU */
#define vgpu_aperture_offset(vgpu) ((vgpu)->gm.low_gm_node.start)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 026fb46020f6..323863504111 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -143,8 +143,6 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
unsigned int frontbuffer_bits;
int pin_count = 0;

- lockdep_assert_held(&obj->base.dev->struct_mutex);
-
seq_printf(m, "%pK: %c%c%c%c%c %8zdKiB %02x %02x %s%s%s",
&obj->base,
get_active_flag(obj),
@@ -160,17 +158,17 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
obj->mm.madv == I915_MADV_DONTNEED ? " purgeable" : "");
if (obj->base.name)
seq_printf(m, " (name: %d)", obj->base.name);
- list_for_each_entry(vma, &obj->vma.list, obj_link) {
- if (i915_vma_is_pinned(vma))
- pin_count++;
- }
- seq_printf(m, " (pinned x %d)", pin_count);
- if (obj->pin_global)
- seq_printf(m, " (global)");
+
+ spin_lock(&obj->vma.lock);
list_for_each_entry(vma, &obj->vma.list, obj_link) {
if (!drm_mm_node_allocated(&vma->node))
continue;

+ spin_unlock(&obj->vma.lock);
+
+ if (i915_vma_is_pinned(vma))
+ pin_count++;
+
seq_printf(m, " (%sgtt offset: %08llx, size: %08llx, pages: %s",
i915_vma_is_ggtt(vma) ? "g" : "pp",
vma->node.start, vma->node.size,
@@ -221,9 +219,16 @@ describe_obj(struct seq_file *m, struct drm_i915_gem_object *obj)
vma->fence->id,
i915_active_request_isset(&vma->last_fence) ? "*" : "");
seq_puts(m, ")");
+
+ spin_lock(&obj->vma.lock);
}
+ spin_unlock(&obj->vma.lock);
+
+ seq_printf(m, " (pinned x %d)", pin_count);
if (obj->stolen)
seq_printf(m, " (stolen: %08llx)", obj->stolen->start);
+ if (obj->pin_global)
+ seq_printf(m, " (global)");

engine = i915_gem_object_last_write_engine(obj);
if (engine)
@@ -698,28 +703,25 @@ static int i915_interrupt_info(struct seq_file *m, void *data)

static int i915_gem_fence_regs_info(struct seq_file *m, void *data)
{
- struct drm_i915_private *dev_priv = node_to_i915(m->private);
- struct drm_device *dev = &dev_priv->drm;
- int i, ret;
+ struct drm_i915_private *i915 = node_to_i915(m->private);
+ unsigned int i;

- ret = mutex_lock_interruptible(&dev->struct_mutex);
- if (ret)
- return ret;
+ seq_printf(m, "Total fences = %d\n", i915->ggtt.num_fences);

- seq_printf(m, "Total fences = %d\n", dev_priv->num_fence_regs);
- for (i = 0; i < dev_priv->num_fence_regs; i++) {
- struct i915_vma *vma = dev_priv->fence_regs[i].vma;
+ rcu_read_lock();
+ for (i = 0; i < i915->ggtt.num_fences; i++) {
+ struct i915_vma *vma = i915->ggtt.fence_regs[i].vma;

seq_printf(m, "Fence %d, pin count = %d, object = ",
- i, dev_priv->fence_regs[i].pin_count);
+ i, i915->ggtt.fence_regs[i].pin_count);
if (!vma)
seq_puts(m, "unused");
else
describe_obj(m, vma->obj);
seq_putc(m, '\n');
}
+ rcu_read_unlock();

- mutex_unlock(&dev->struct_mutex);
return 0;
}

diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index 81ff2c78fd55..254f7b7df306 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -350,7 +350,7 @@ static int i915_getparam_ioctl(struct drm_device *dev, void *data,
value = pdev->revision;
break;
case I915_PARAM_NUM_FENCES_AVAIL:
- value = dev_priv->num_fence_regs;
+ value = dev_priv->ggtt.num_fences;
break;
case I915_PARAM_HAS_OVERLAY:
value = dev_priv->overlay ? 1 : 0;
@@ -1625,7 +1625,6 @@ static int i915_driver_init_hw(struct drm_i915_private *dev_priv)
intel_uncore_sanitize(dev_priv);

intel_gt_init_workarounds(dev_priv);
- i915_gem_load_init_fences(dev_priv);

/* On the 945G/GM, the chipset reports the MSI capability on the
* integrated graphics even though the support isn't actually there
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index eb98d285d290..90d94d904e65 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -757,14 +757,6 @@ struct i915_gem_mm {
*/
struct list_head shrink_list;

- /** List of all objects in gtt_space, currently mmaped by userspace.
- * All objects within this list must also be on bound_list.
- */
- struct list_head userfault_list;
-
- /* Manual runtime pm autosuspend delay for user GGTT mmaps */
- struct intel_wakeref_auto userfault_wakeref;
-
/**
* List of objects which are pending destruction.
*/
@@ -794,9 +786,6 @@ struct i915_gem_mm {
struct notifier_block vmap_notifier;
struct shrinker shrinker;

- /** LRU list of objects with fence regs on them. */
- struct list_head fence_list;
-
/**
* Workqueue to fault in userptr pages, flushed by the execbuf
* when required but otherwise left to userspace to try again
@@ -1485,9 +1474,6 @@ struct drm_i915_private {
/* protects panel power sequencer state */
struct mutex pps_mutex;

- struct drm_i915_fence_reg fence_regs[I915_MAX_NUM_FENCES]; /* assume 965 */
- int num_fence_regs; /* 8 on pre-965, 16 otherwise */
-
unsigned int fsb_freq, mem_freq, is_ddr3;
unsigned int skl_preferred_vco_freq;
unsigned int max_cdclk_freq;
@@ -2541,7 +2527,6 @@ void i915_gem_cleanup_userptr(struct drm_i915_private *dev_priv);
void i915_gem_sanitize(struct drm_i915_private *i915);
int i915_gem_init_early(struct drm_i915_private *dev_priv);
void i915_gem_cleanup_early(struct drm_i915_private *dev_priv);
-void i915_gem_load_init_fences(struct drm_i915_private *dev_priv);
int i915_gem_freeze(struct drm_i915_private *dev_priv);
int i915_gem_freeze_late(struct drm_i915_private *dev_priv);

@@ -2661,19 +2646,6 @@ struct drm_gem_object *i915_gem_prime_import(struct drm_device *dev,
struct dma_buf *i915_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *gem_obj, int flags);

-/* i915_gem_fence_reg.c */
-struct drm_i915_fence_reg *
-i915_reserve_fence(struct drm_i915_private *dev_priv);
-void i915_unreserve_fence(struct drm_i915_fence_reg *fence);
-
-void i915_gem_restore_fences(struct drm_i915_private *dev_priv);
-
-void i915_gem_detect_bit_6_swizzle(struct drm_i915_private *dev_priv);
-void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj,
- struct sg_table *pages);
-void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj,
- struct sg_table *pages);
-
static inline struct i915_gem_context *
__i915_gem_context_lookup_rcu(struct drm_i915_file_private *file_priv, u32 id)
{
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 4017ecf561f6..4bbded4aa936 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -884,7 +884,7 @@ i915_gem_sw_finish_ioctl(struct drm_device *dev, void *data,
return 0;
}

-void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
+void i915_gem_runtime_suspend(struct drm_i915_private *i915)
{
struct drm_i915_gem_object *obj, *on;
int i;
@@ -897,17 +897,19 @@ void i915_gem_runtime_suspend(struct drm_i915_private *dev_priv)
*/

list_for_each_entry_safe(obj, on,
- &dev_priv->mm.userfault_list, userfault_link)
+ &i915->ggtt.userfault_list, userfault_link)
__i915_gem_object_release_mmap(obj);

- /* The fence will be lost when the device powers down. If any were
+ /*
+ * The fence will be lost when the device powers down. If any were
* in use by hardware (i.e. they are pinned), we should not be powering
* down! All other fences will be reacquired by the user upon waking.
*/
- for (i = 0; i < dev_priv->num_fence_regs; i++) {
- struct drm_i915_fence_reg *reg = &dev_priv->fence_regs[i];
+ for (i = 0; i < i915->ggtt.num_fences; i++) {
+ struct i915_fence_reg *reg = &i915->ggtt.fence_regs[i];

- /* Ideally we want to assert that the fence register is not
+ /*
+ * Ideally we want to assert that the fence register is not
* live at this point (i.e. that no piece of code will be
* trying to write through fence + GTT, as that both violates
* our tracking of activity and associated locking/barriers,
@@ -1687,7 +1689,7 @@ void i915_gem_fini_hw(struct drm_i915_private *dev_priv)
{
GEM_BUG_ON(dev_priv->gt.awake);

- intel_wakeref_auto_fini(&dev_priv->mm.userfault_wakeref);
+ intel_wakeref_auto_fini(&dev_priv->ggtt.userfault_wakeref);

i915_gem_suspend_late(dev_priv);
intel_disable_gt_powersave(dev_priv);
@@ -1729,38 +1731,6 @@ void i915_gem_init_mmio(struct drm_i915_private *i915)
i915_gem_sanitize(i915);
}

-void
-i915_gem_load_init_fences(struct drm_i915_private *dev_priv)
-{
- int i;
-
- if (INTEL_GEN(dev_priv) >= 7 && !IS_VALLEYVIEW(dev_priv) &&
- !IS_CHERRYVIEW(dev_priv))
- dev_priv->num_fence_regs = 32;
- else if (INTEL_GEN(dev_priv) >= 4 ||
- IS_I945G(dev_priv) || IS_I945GM(dev_priv) ||
- IS_G33(dev_priv) || IS_PINEVIEW(dev_priv))
- dev_priv->num_fence_regs = 16;
- else
- dev_priv->num_fence_regs = 8;
-
- if (intel_vgpu_active(dev_priv))
- dev_priv->num_fence_regs =
- I915_READ(vgtif_reg(avail_rs.fence_num));
-
- /* Initialize fence registers to zero */
- for (i = 0; i < dev_priv->num_fence_regs; i++) {
- struct drm_i915_fence_reg *fence = &dev_priv->fence_regs[i];
-
- fence->i915 = dev_priv;
- fence->id = i;
- list_add_tail(&fence->link, &dev_priv->mm.fence_list);
- }
- i915_gem_restore_fences(dev_priv);
-
- i915_gem_detect_bit_6_swizzle(dev_priv);
-}
-
static void i915_gem_init__mm(struct drm_i915_private *i915)
{
spin_lock_init(&i915->mm.obj_lock);
@@ -1770,10 +1740,6 @@ static void i915_gem_init__mm(struct drm_i915_private *i915)

INIT_LIST_HEAD(&i915->mm.purge_list);
INIT_LIST_HEAD(&i915->mm.shrink_list);
- INIT_LIST_HEAD(&i915->mm.fence_list);
-
- INIT_LIST_HEAD(&i915->mm.userfault_list);
- intel_wakeref_auto_init(&i915->mm.userfault_wakeref, i915);

i915_gem_init__objects(i915);
}
diff --git a/drivers/gpu/drm/i915/i915_gem_fence_reg.c b/drivers/gpu/drm/i915/i915_gem_fence_reg.c
index 10aa6e350bfa..1c9466676caf 100644
--- a/drivers/gpu/drm/i915/i915_gem_fence_reg.c
+++ b/drivers/gpu/drm/i915/i915_gem_fence_reg.c
@@ -25,6 +25,7 @@

#include "i915_drv.h"
#include "i915_scatterlist.h"
+#include "i915_vgpu.h"

/**
* DOC: fence register handling
@@ -58,7 +59,7 @@

#define pipelined 0

-static void i965_write_fence_reg(struct drm_i915_fence_reg *fence,
+static void i965_write_fence_reg(struct i915_fence_reg *fence,
struct i915_vma *vma)
{
i915_reg_t fence_reg_lo, fence_reg_hi;
@@ -115,7 +116,7 @@ static void i965_write_fence_reg(struct drm_i915_fence_reg *fence,
}
}

-static void i915_write_fence_reg(struct drm_i915_fence_reg *fence,
+static void i915_write_fence_reg(struct i915_fence_reg *fence,
struct i915_vma *vma)
{
u32 val;
@@ -155,7 +156,7 @@ static void i915_write_fence_reg(struct drm_i915_fence_reg *fence,
}
}

-static void i830_write_fence_reg(struct drm_i915_fence_reg *fence,
+static void i830_write_fence_reg(struct i915_fence_reg *fence,
struct i915_vma *vma)
{
u32 val;
@@ -187,7 +188,7 @@ static void i830_write_fence_reg(struct drm_i915_fence_reg *fence,
}
}

-static void fence_write(struct drm_i915_fence_reg *fence,
+static void fence_write(struct i915_fence_reg *fence,
struct i915_vma *vma)
{
/*
@@ -211,7 +212,7 @@ static void fence_write(struct drm_i915_fence_reg *fence,
fence->dirty = false;
}

-static int fence_update(struct drm_i915_fence_reg *fence,
+static int fence_update(struct i915_fence_reg *fence,
struct i915_vma *vma)
{
intel_wakeref_t wakeref;
@@ -256,7 +257,7 @@ static int fence_update(struct drm_i915_fence_reg *fence,
old->fence = NULL;
}

- list_move(&fence->link, &fence->i915->mm.fence_list);
+ list_move(&fence->link, &fence->i915->ggtt.fence_list);
}

/*
@@ -280,7 +281,7 @@ static int fence_update(struct drm_i915_fence_reg *fence,

if (vma) {
vma->fence = fence;
- list_move_tail(&fence->link, &fence->i915->mm.fence_list);
+ list_move_tail(&fence->link, &fence->i915->ggtt.fence_list);
}

intel_runtime_pm_put(fence->i915, wakeref);
@@ -300,7 +301,7 @@ static int fence_update(struct drm_i915_fence_reg *fence,
*/
int i915_vma_put_fence(struct i915_vma *vma)
{
- struct drm_i915_fence_reg *fence = vma->fence;
+ struct i915_fence_reg *fence = vma->fence;

if (!fence)
return 0;
@@ -311,11 +312,11 @@ int i915_vma_put_fence(struct i915_vma *vma)
return fence_update(fence, NULL);
}

-static struct drm_i915_fence_reg *fence_find(struct drm_i915_private *i915)
+static struct i915_fence_reg *fence_find(struct drm_i915_private *i915)
{
- struct drm_i915_fence_reg *fence;
+ struct i915_fence_reg *fence;

- list_for_each_entry(fence, &i915->mm.fence_list, link) {
+ list_for_each_entry(fence, &i915->ggtt.fence_list, link) {
GEM_BUG_ON(fence->vma && fence->vma->fence != fence);

if (fence->pin_count)
@@ -349,10 +350,9 @@ static struct drm_i915_fence_reg *fence_find(struct drm_i915_private *i915)
*
* 0 on success, negative error code on failure.
*/
-int
-i915_vma_pin_fence(struct i915_vma *vma)
+int i915_vma_pin_fence(struct i915_vma *vma)
{
- struct drm_i915_fence_reg *fence;
+ struct i915_fence_reg *fence;
struct i915_vma *set = i915_gem_object_is_tiled(vma->obj) ? vma : NULL;
int err;

@@ -369,7 +369,7 @@ i915_vma_pin_fence(struct i915_vma *vma)
fence->pin_count++;
if (!fence->dirty) {
list_move_tail(&fence->link,
- &fence->i915->mm.fence_list);
+ &fence->i915->ggtt.fence_list);
return 0;
}
} else if (set) {
@@ -404,10 +404,9 @@ i915_vma_pin_fence(struct i915_vma *vma)
* This function walks the fence regs looking for a free one and remove
* it from the fence_list. It is used to reserve fence for vGPU to use.
*/
-struct drm_i915_fence_reg *
-i915_reserve_fence(struct drm_i915_private *i915)
+struct i915_fence_reg *i915_reserve_fence(struct drm_i915_private *i915)
{
- struct drm_i915_fence_reg *fence;
+ struct i915_fence_reg *fence;
int count;
int ret;

@@ -415,7 +414,7 @@ i915_reserve_fence(struct drm_i915_private *i915)

/* Keep at least one fence available for the display engine. */
count = 0;
- list_for_each_entry(fence, &i915->mm.fence_list, link)
+ list_for_each_entry(fence, &i915->ggtt.fence_list, link)
count += !fence->pin_count;
if (count <= 1)
return ERR_PTR(-ENOSPC);
@@ -441,11 +440,11 @@ i915_reserve_fence(struct drm_i915_private *i915)
*
* This function add a reserved fence register from vGPU to the fence_list.
*/
-void i915_unreserve_fence(struct drm_i915_fence_reg *fence)
+void i915_unreserve_fence(struct i915_fence_reg *fence)
{
lockdep_assert_held(&fence->i915->drm.struct_mutex);

- list_add(&fence->link, &fence->i915->mm.fence_list);
+ list_add(&fence->link, &fence->i915->ggtt.fence_list);
}

/**
@@ -461,8 +460,8 @@ void i915_gem_restore_fences(struct drm_i915_private *i915)
int i;

rcu_read_lock(); /* keep obj alive as we dereference */
- for (i = 0; i < i915->num_fence_regs; i++) {
- struct drm_i915_fence_reg *reg = &i915->fence_regs[i];
+ for (i = 0; i < i915->ggtt.num_fences; i++) {
+ struct i915_fence_reg *reg = &i915->ggtt.fence_regs[i];
struct i915_vma *vma = READ_ONCE(reg->vma);

GEM_BUG_ON(vma && vma->fence != reg);
@@ -534,8 +533,7 @@ void i915_gem_restore_fences(struct drm_i915_private *i915)
* Detects bit 6 swizzling of address lookup between IGD access and CPU
* access through main memory.
*/
-void
-i915_gem_detect_bit_6_swizzle(struct drm_i915_private *i915)
+static void detect_bit_6_swizzle(struct drm_i915_private *i915)
{
struct intel_uncore *uncore = &i915->uncore;
u32 swizzle_x = I915_BIT_6_SWIZZLE_UNKNOWN;
@@ -708,8 +706,7 @@ i915_gem_detect_bit_6_swizzle(struct drm_i915_private *i915)
* bit 17 of its physical address and therefore being interpreted differently
* by the GPU.
*/
-static void
-i915_gem_swizzle_page(struct page *page)
+static void i915_gem_swizzle_page(struct page *page)
{
char temp[64];
char *vaddr;
@@ -798,3 +795,42 @@ i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj,
i++;
}
}
+
+void i915_ggtt_init_fences(struct i915_ggtt *ggtt)
+{
+ struct drm_i915_private *i915 = ggtt->vm.i915;
+ int num_fences;
+ int i;
+
+ INIT_LIST_HEAD(&ggtt->fence_list);
+ INIT_LIST_HEAD(&ggtt->userfault_list);
+ intel_wakeref_auto_init(&ggtt->userfault_wakeref, i915);
+
+ detect_bit_6_swizzle(i915);
+
+ if (INTEL_GEN(i915) >= 7 &&
+ !(IS_VALLEYVIEW(i915) || IS_CHERRYVIEW(i915)))
+ num_fences = 32;
+ else if (INTEL_GEN(i915) >= 4 ||
+ IS_I945G(i915) || IS_I945GM(i915) ||
+ IS_G33(i915) || IS_PINEVIEW(i915))
+ num_fences = 16;
+ else
+ num_fences = 8;
+
+ if (intel_vgpu_active(i915))
+ num_fences = intel_uncore_read(&i915->uncore,
+ vgtif_reg(avail_rs.fence_num));
+
+ /* Initialize fence registers to zero */
+ for (i = 0; i < num_fences; i++) {
+ struct i915_fence_reg *fence = &ggtt->fence_regs[i];
+
+ fence->i915 = i915;
+ fence->id = i;
+ list_add_tail(&fence->link, &ggtt->fence_list);
+ }
+ ggtt->num_fences = num_fences;
+
+ i915_gem_restore_fences(i915);
+}
diff --git a/drivers/gpu/drm/i915/i915_gem_fence_reg.h b/drivers/gpu/drm/i915/i915_gem_fence_reg.h
index 09dcaf14121b..d2da98828179 100644
--- a/drivers/gpu/drm/i915/i915_gem_fence_reg.h
+++ b/drivers/gpu/drm/i915/i915_gem_fence_reg.h
@@ -26,13 +26,17 @@
#define __I915_FENCE_REG_H__

#include <linux/list.h>
+#include <linux/types.h>

+struct drm_i915_gem_object;
struct drm_i915_private;
+struct i915_ggtt;
struct i915_vma;
+struct sg_table;

#define I965_FENCE_PAGE 4096UL

-struct drm_i915_fence_reg {
+struct i915_fence_reg {
struct list_head link;
struct drm_i915_private *i915;
struct i915_vma *vma;
@@ -49,4 +53,17 @@ struct drm_i915_fence_reg {
bool dirty;
};

+/* i915_gem_fence_reg.c */
+struct i915_fence_reg *i915_reserve_fence(struct drm_i915_private *i915);
+void i915_unreserve_fence(struct i915_fence_reg *fence);
+
+void i915_gem_restore_fences(struct drm_i915_private *i915);
+
+void i915_gem_object_do_bit_17_swizzle(struct drm_i915_gem_object *obj,
+ struct sg_table *pages);
+void i915_gem_object_save_bit_17_swizzle(struct drm_i915_gem_object *obj,
+ struct sg_table *pages);
+
+void i915_ggtt_init_fences(struct i915_ggtt *ggtt);
+
#endif
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c b/drivers/gpu/drm/i915/i915_gem_gtt.c
index e70675bfb51d..7be72388b052 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -3567,6 +3567,8 @@ int i915_ggtt_init_hw(struct drm_i915_private *dev_priv)

ggtt->mtrr = arch_phys_wc_add(ggtt->gmadr.start, ggtt->mappable_end);

+ i915_ggtt_init_fences(ggtt);
+
/*
* Initialise stolen early so that we may reserve preallocated
* objects for the BIOS to KMS transition.
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.h b/drivers/gpu/drm/i915/i915_gem_gtt.h
index 89437d0a721c..63fa357c69de 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.h
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.h
@@ -39,6 +39,7 @@
#include <linux/pagevec.h>

#include "gt/intel_reset.h"
+#include "i915_gem_fence_reg.h"
#include "i915_request.h"
#include "i915_scatterlist.h"
#include "i915_selftest.h"
@@ -61,7 +62,6 @@
#define I915_MAX_NUM_FENCE_BITS 6

struct drm_i915_file_private;
-struct drm_i915_fence_reg;
struct drm_i915_gem_object;
struct i915_vma;

@@ -408,6 +408,18 @@ struct i915_ggtt {

u32 pin_bias;

+ unsigned int num_fences;
+ struct i915_fence_reg fence_regs[I915_MAX_NUM_FENCES];
+ struct list_head fence_list;
+
+ /** List of all objects in gtt_space, currently mmaped by userspace.
+ * All objects within this list must also be on bound_list.
+ */
+ struct list_head userfault_list;
+
+ /* Manual runtime pm autosuspend delay for user GGTT mmaps */
+ struct intel_wakeref_auto userfault_wakeref;
+
struct drm_mm_node error_capture;
struct drm_mm_node uc_fw;
};
diff --git a/drivers/gpu/drm/i915/i915_gpu_error.c b/drivers/gpu/drm/i915/i915_gpu_error.c
index d7f164c9f2eb..26c9c0595bdf 100644
--- a/drivers/gpu/drm/i915/i915_gpu_error.c
+++ b/drivers/gpu/drm/i915/i915_gpu_error.c
@@ -1127,17 +1127,17 @@ static void gem_record_fences(struct i915_gpu_state *error)
int i;

if (INTEL_GEN(dev_priv) >= 6) {
- for (i = 0; i < dev_priv->num_fence_regs; i++)
+ for (i = 0; i < dev_priv->ggtt.num_fences; i++)
error->fence[i] =
intel_uncore_read64(uncore,
FENCE_REG_GEN6_LO(i));
} else if (INTEL_GEN(dev_priv) >= 4) {
- for (i = 0; i < dev_priv->num_fence_regs; i++)
+ for (i = 0; i < dev_priv->ggtt.num_fences; i++)
error->fence[i] =
intel_uncore_read64(uncore,
FENCE_REG_965_LO(i));
} else {
- for (i = 0; i < dev_priv->num_fence_regs; i++)
+ for (i = 0; i < dev_priv->ggtt.num_fences; i++)
error->fence[i] =
intel_uncore_read(uncore, FENCE_REG(i));
}
diff --git a/drivers/gpu/drm/i915/i915_vma.h b/drivers/gpu/drm/i915/i915_vma.h
index 0c57ab4fed5d..4b769db649bf 100644
--- a/drivers/gpu/drm/i915/i915_vma.h
+++ b/drivers/gpu/drm/i915/i915_vma.h
@@ -54,7 +54,7 @@ struct i915_vma {
struct drm_i915_gem_object *obj;
struct i915_address_space *vm;
const struct i915_vma_ops *ops;
- struct drm_i915_fence_reg *fence;
+ struct i915_fence_reg *fence;
struct reservation_object *resv; /** Alias of obj->resv */
struct sg_table *pages;
void __iomem *iomap;