diff --git a/drivers/gpu/drm/panfrost/panfrost_device.h b/drivers/gpu/drm/panfrost/panfrost_device.h
index 953f7536a773f511bfc07b46437f7ea951ac14f8..7ad733faadd3f9e6add7b28d795ed5562a6589db 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.h
+++ b/drivers/gpu/drm/panfrost/panfrost_device.h
@@ -112,8 +112,12 @@ struct panfrost_device {
};
struct panfrost_mmu {
+ struct panfrost_device *pfdev;
+ struct kref refcount;
struct io_pgtable_cfg pgtbl_cfg;
struct io_pgtable_ops *pgtbl_ops;
+ struct drm_mm mm;
+ spinlock_t mm_lock;
int as;
atomic_t as_count;
struct list_head list;
@@ -124,9 +128,7 @@ struct panfrost_file_priv {
struct drm_sched_entity sched_entity[NUM_JOB_SLOTS];
- struct panfrost_mmu mmu;
- struct drm_mm mm;
- spinlock_t mm_lock;
+ struct panfrost_mmu *mmu;
};
static inline struct panfrost_device *to_panfrost_device(struct drm_device *ddev)
diff --git a/drivers/gpu/drm/panfrost/panfrost_drv.c b/drivers/gpu/drm/panfrost/panfrost_drv.c
index 36463c89e96694f7f99e47e62fef21dc6259a68c..b2741ae3339783746faceb0f1fd07f430937b50c 100644
--- a/drivers/gpu/drm/panfrost/panfrost_drv.c
+++ b/drivers/gpu/drm/panfrost/panfrost_drv.c
@@ -417,7 +417,7 @@ static int panfrost_ioctl_madvise(struct drm_device *dev, void *data,
* anyway, so let's not bother.
*/
if (!list_is_singular(&bo->mappings.list) ||
- WARN_ON_ONCE(first->mmu != &priv->mmu)) {
+ WARN_ON_ONCE(first->mmu != priv->mmu)) {
ret = -EINVAL;
goto out_unlock_mappings;
}
@@ -449,32 +449,6 @@ int panfrost_unstable_ioctl_check(void)
return 0;
}
-#define PFN_4G (SZ_4G >> PAGE_SHIFT)
-#define PFN_4G_MASK (PFN_4G - 1)
-#define PFN_16M (SZ_16M >> PAGE_SHIFT)
-
-static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node,
- unsigned long color,
- u64 *start, u64 *end)
-{
- /* Executable buffers can't start or end on a 4GB boundary */
- if (!(color & PANFROST_BO_NOEXEC)) {
- u64 next_seg;
-
- if ((*start & PFN_4G_MASK) == 0)
- (*start)++;
-
- if ((*end & PFN_4G_MASK) == 0)
- (*end)--;
-
- next_seg = ALIGN(*start, PFN_4G);
- if (next_seg - *start <= PFN_16M)
- *start = next_seg + 1;
-
- *end = min(*end, ALIGN(*start, PFN_4G) - 1);
- }
-}
-
static int
panfrost_open(struct drm_device *dev, struct drm_file *file)
{
@@ -489,15 +463,11 @@ panfrost_open(struct drm_device *dev, struct drm_file *file)
panfrost_priv->pfdev = pfdev;
file->driver_priv = panfrost_priv;
- spin_lock_init(&panfrost_priv->mm_lock);
-
- /* 4G enough for now. can be 48-bit */
- drm_mm_init(&panfrost_priv->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
- panfrost_priv->mm.color_adjust = panfrost_drm_mm_color_adjust;
-
- ret = panfrost_mmu_pgtable_alloc(panfrost_priv);
- if (ret)
- goto err_pgtable;
+ panfrost_priv->mmu = panfrost_mmu_ctx_create(pfdev);
+ if (IS_ERR(panfrost_priv->mmu)) {
+ ret = PTR_ERR(panfrost_priv->mmu);
+ goto err_free;
+ }
ret = panfrost_job_open(panfrost_priv);
if (ret)
@@ -506,9 +476,8 @@ panfrost_open(struct drm_device *dev, struct drm_file *file)
return 0;
err_job:
- panfrost_mmu_pgtable_free(panfrost_priv);
-err_pgtable:
- drm_mm_takedown(&panfrost_priv->mm);
+ panfrost_mmu_ctx_put(panfrost_priv->mmu);
+err_free:
kfree(panfrost_priv);
return ret;
}
@@ -521,8 +490,7 @@ panfrost_postclose(struct drm_device *dev, struct drm_file *file)
panfrost_perfcnt_close(file);
panfrost_job_close(panfrost_priv);
- panfrost_mmu_pgtable_free(panfrost_priv);
- drm_mm_takedown(&panfrost_priv->mm);
+ panfrost_mmu_ctx_put(panfrost_priv->mmu);
kfree(panfrost_priv);
}
diff --git a/drivers/gpu/drm/panfrost/panfrost_gem.c b/drivers/gpu/drm/panfrost/panfrost_gem.c
index 33355dd302f11f30ebaee684b2988f484f767501..6cd8861798e7635eb23b21c42f7790dcee6bf72b 100644
--- a/drivers/gpu/drm/panfrost/panfrost_gem.c
+++ b/drivers/gpu/drm/panfrost/panfrost_gem.c
@@ -60,7 +60,7 @@ panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
mutex_lock(&bo->mappings.lock);
list_for_each_entry(iter, &bo->mappings.list, node) {
- if (iter->mmu == &priv->mmu) {
+ if (iter->mmu == priv->mmu) {
kref_get(&iter->refcount);
mapping = iter;
break;
@@ -74,16 +74,13 @@ panfrost_gem_mapping_get(struct panfrost_gem_object *bo,
static void
panfrost_gem_teardown_mapping(struct panfrost_gem_mapping *mapping)
{
- struct panfrost_file_priv *priv;
-
if (mapping->active)
panfrost_mmu_unmap(mapping);
- priv = container_of(mapping->mmu, struct panfrost_file_priv, mmu);
- spin_lock(&priv->mm_lock);
+ spin_lock(&mapping->mmu->mm_lock);
if (drm_mm_node_allocated(&mapping->mmnode))
drm_mm_remove_node(&mapping->mmnode);
- spin_unlock(&priv->mm_lock);
+ spin_unlock(&mapping->mmu->mm_lock);
}
static void panfrost_gem_mapping_release(struct kref *kref)
@@ -94,6 +91,7 @@ static void panfrost_gem_mapping_release(struct kref *kref)
panfrost_gem_teardown_mapping(mapping);
drm_gem_object_put(&mapping->obj->base.base);
+ panfrost_mmu_ctx_put(mapping->mmu);
kfree(mapping);
}
@@ -145,11 +143,11 @@ int panfrost_gem_open(struct drm_gem_object *obj, struct drm_file *file_priv)
else
align = size >= SZ_2M ? SZ_2M >> PAGE_SHIFT : 0;
- mapping->mmu = &priv->mmu;
- spin_lock(&priv->mm_lock);
- ret = drm_mm_insert_node_generic(&priv->mm, &mapping->mmnode,
+ mapping->mmu = panfrost_mmu_ctx_get(priv->mmu);
+ spin_lock(&mapping->mmu->mm_lock);
+ ret = drm_mm_insert_node_generic(&mapping->mmu->mm, &mapping->mmnode,
size >> PAGE_SHIFT, align, color, 0);
- spin_unlock(&priv->mm_lock);
+ spin_unlock(&mapping->mmu->mm_lock);
if (ret)
goto err;
@@ -178,7 +176,7 @@ void panfrost_gem_close(struct drm_gem_object *obj, struct drm_file *file_priv)
mutex_lock(&bo->mappings.lock);
list_for_each_entry(iter, &bo->mappings.list, node) {
- if (iter->mmu == &priv->mmu) {
+ if (iter->mmu == priv->mmu) {
mapping = iter;
list_del(&iter->node);
break;
diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
index 30e7b7196dab059c96a32e53a0fe8680b1675c0e..a2be3f8241a9335d06dd79a310690867e8f3b462 100644
--- a/drivers/gpu/drm/panfrost/panfrost_job.c
+++ b/drivers/gpu/drm/panfrost/panfrost_job.c
@@ -155,7 +155,7 @@ static void panfrost_job_hw_submit(struct panfrost_job *job, int js)
return;
}
- cfg = panfrost_mmu_as_get(pfdev, &job->file_priv->mmu);
+ cfg = panfrost_mmu_as_get(pfdev, job->file_priv->mmu);
job_write(pfdev, JS_HEAD_NEXT_LO(js), jc_head & 0xFFFFFFFF);
job_write(pfdev, JS_HEAD_NEXT_HI(js), jc_head >> 32);
@@ -477,7 +477,7 @@ static irqreturn_t panfrost_job_irq_handler(int irq, void *data)
if (job) {
pfdev->jobs[j] = NULL;
- panfrost_mmu_as_put(pfdev, &job->file_priv->mmu);
+ panfrost_mmu_as_put(pfdev, job->file_priv->mmu);
panfrost_devfreq_record_idle(&pfdev->pfdevfreq);
dma_fence_signal_locked(job->done_fence);
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c
index 1a49e619aacf1faee5f0b56b2ba7691be4f83dad..676fd2dc56eada4a739abe1e714c4f806a84e221 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.c
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c
@@ -1,5 +1,8 @@
// SPDX-License-Identifier: GPL-2.0
/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
+
+#include <drm/panfrost_drm.h>
+
#include <linux/atomic.h>
#include <linux/bitfield.h>
#include <linux/delay.h>
@@ -337,7 +340,7 @@ static void mmu_tlb_inv_context_s1(void *cookie)
static void mmu_tlb_sync_context(void *cookie)
{
- //struct panfrost_device *pfdev = cookie;
+ //struct panfrost_mmu *mmu = cookie;
// TODO: Wait 1000 GPU cycles for HW_ISSUE_6367/T60X
}
@@ -359,56 +362,10 @@ static const struct iommu_flush_ops mmu_tlb_ops = {
.tlb_flush_leaf = mmu_tlb_flush_leaf,
};
-int panfrost_mmu_pgtable_alloc(struct panfrost_file_priv *priv)
-{
- struct panfrost_mmu *mmu = &priv->mmu;
- struct panfrost_device *pfdev = priv->pfdev;
-
- INIT_LIST_HEAD(&mmu->list);
- mmu->as = -1;
-
- mmu->pgtbl_cfg = (struct io_pgtable_cfg) {
- .pgsize_bitmap = SZ_4K | SZ_2M,
- .ias = FIELD_GET(0xff, pfdev->features.mmu_features),
- .oas = FIELD_GET(0xff00, pfdev->features.mmu_features),
- .tlb = &mmu_tlb_ops,
- .iommu_dev = pfdev->dev,
- };
-
- mmu->pgtbl_ops = alloc_io_pgtable_ops(ARM_MALI_LPAE, &mmu->pgtbl_cfg,
- priv);
- if (!mmu->pgtbl_ops)
- return -EINVAL;
-
- return 0;
-}
-
-void panfrost_mmu_pgtable_free(struct panfrost_file_priv *priv)
-{
- struct panfrost_device *pfdev = priv->pfdev;
- struct panfrost_mmu *mmu = &priv->mmu;
-
- spin_lock(&pfdev->as_lock);
- if (mmu->as >= 0) {
- pm_runtime_get_noresume(pfdev->dev);
- if (pm_runtime_active(pfdev->dev))
- panfrost_mmu_disable(pfdev, mmu->as);
- pm_runtime_put_autosuspend(pfdev->dev);
-
- clear_bit(mmu->as, &pfdev->as_alloc_mask);
- clear_bit(mmu->as, &pfdev->as_in_use_mask);
- list_del(&mmu->list);
- }
- spin_unlock(&pfdev->as_lock);
-
- free_io_pgtable_ops(mmu->pgtbl_ops);
-}
-
static struct panfrost_gem_mapping *
addr_to_mapping(struct panfrost_device *pfdev, int as, u64 addr)
{
struct panfrost_gem_mapping *mapping = NULL;
- struct panfrost_file_priv *priv;
struct drm_mm_node *node;
u64 offset = addr >> PAGE_SHIFT;
struct panfrost_mmu *mmu;
@@ -421,11 +378,10 @@ addr_to_mapping(struct panfrost_device *pfdev, int as, u64 addr)
goto out;
found_mmu:
- priv = container_of(mmu, struct panfrost_file_priv, mmu);
- spin_lock(&priv->mm_lock);
+ spin_lock(&mmu->mm_lock);
- drm_mm_for_each_node(node, &priv->mm) {
+ drm_mm_for_each_node(node, &mmu->mm) {
if (offset >= node->start &&
offset < (node->start + node->size)) {
mapping = drm_mm_node_to_panfrost_mapping(node);
@@ -435,7 +391,7 @@ addr_to_mapping(struct panfrost_device *pfdev, int as, u64 addr)
}
}
- spin_unlock(&priv->mm_lock);
+ spin_unlock(&mmu->mm_lock);
out:
spin_unlock(&pfdev->as_lock);
return mapping;
@@ -542,6 +498,106 @@ static int panfrost_mmu_map_fault_addr(struct panfrost_device *pfdev, int as,
return ret;
}
+static void panfrost_mmu_release_ctx(struct kref *kref)
+{
+ struct panfrost_mmu *mmu = container_of(kref, struct panfrost_mmu,
+ refcount);
+ struct panfrost_device *pfdev = mmu->pfdev;
+
+ spin_lock(&pfdev->as_lock);
+ if (mmu->as >= 0) {
+ pm_runtime_get_noresume(pfdev->dev);
+ if (pm_runtime_active(pfdev->dev))
+ panfrost_mmu_disable(pfdev, mmu->as);
+ pm_runtime_put_autosuspend(pfdev->dev);
+
+ clear_bit(mmu->as, &pfdev->as_alloc_mask);
+ clear_bit(mmu->as, &pfdev->as_in_use_mask);
+ list_del(&mmu->list);
+ }
+ spin_unlock(&pfdev->as_lock);
+
+ free_io_pgtable_ops(mmu->pgtbl_ops);
+ drm_mm_takedown(&mmu->mm);
+ kfree(mmu);
+}
+
+void panfrost_mmu_ctx_put(struct panfrost_mmu *mmu)
+{
+ kref_put(&mmu->refcount, panfrost_mmu_release_ctx);
+}
+
+struct panfrost_mmu *panfrost_mmu_ctx_get(struct panfrost_mmu *mmu)
+{
+ kref_get(&mmu->refcount);
+
+ return mmu;
+}
+
+#define PFN_4G (SZ_4G >> PAGE_SHIFT)
+#define PFN_4G_MASK (PFN_4G - 1)
+#define PFN_16M (SZ_16M >> PAGE_SHIFT)
+
+static void panfrost_drm_mm_color_adjust(const struct drm_mm_node *node,
+ unsigned long color,
+ u64 *start, u64 *end)
+{
+ /* Executable buffers can't start or end on a 4GB boundary */
+ if (!(color & PANFROST_BO_NOEXEC)) {
+ u64 next_seg;
+
+ if ((*start & PFN_4G_MASK) == 0)
+ (*start)++;
+
+ if ((*end & PFN_4G_MASK) == 0)
+ (*end)--;
+
+ next_seg = ALIGN(*start, PFN_4G);
+ if (next_seg - *start <= PFN_16M)
+ *start = next_seg + 1;
+
+ *end = min(*end, ALIGN(*start, PFN_4G) - 1);
+ }
+}
+
+struct panfrost_mmu *panfrost_mmu_ctx_create(struct panfrost_device *pfdev)
+{
+ struct panfrost_mmu *mmu;
+
+ mmu = kzalloc(sizeof(*mmu), GFP_KERNEL);
+ if (!mmu)
+ return ERR_PTR(-ENOMEM);
+
+ mmu->pfdev = pfdev;
+ spin_lock_init(&mmu->mm_lock);
+
+ /* 4G enough for now. can be 48-bit */
+ drm_mm_init(&mmu->mm, SZ_32M >> PAGE_SHIFT, (SZ_4G - SZ_32M) >> PAGE_SHIFT);
+ mmu->mm.color_adjust = panfrost_drm_mm_color_adjust;
+
+ INIT_LIST_HEAD(&mmu->list);
+ mmu->as = -1;
+
+ mmu->pgtbl_cfg = (struct io_pgtable_cfg) {
+ .pgsize_bitmap = SZ_4K | SZ_2M,
+ .ias = FIELD_GET(0xff, pfdev->features.mmu_features),
+ .oas = FIELD_GET(0xff00, pfdev->features.mmu_features),
+ .tlb = &mmu_tlb_ops,
+ .iommu_dev = pfdev->dev,
+ };
+
+ mmu->pgtbl_ops = alloc_io_pgtable_ops(ARM_MALI_LPAE, &mmu->pgtbl_cfg,
+ mmu);
+ if (!mmu->pgtbl_ops) {
+ kfree(mmu);
+ return ERR_PTR(-EINVAL);
+ }
+
+ kref_init(&mmu->refcount);
+
+ return mmu;
+}
+
static const char *access_type_name(struct panfrost_device *pfdev,
u32 fault_status)
{
diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.h b/drivers/gpu/drm/panfrost/panfrost_mmu.h
index 44fc2edf63ce66a13dc49126ae40f49f2b1506c8..cc2a0d307febcd2971e8ed046500100b43f1c1d5 100644
--- a/drivers/gpu/drm/panfrost/panfrost_mmu.h
+++ b/drivers/gpu/drm/panfrost/panfrost_mmu.h
@@ -18,7 +18,8 @@ void panfrost_mmu_reset(struct panfrost_device *pfdev);
u32 panfrost_mmu_as_get(struct panfrost_device *pfdev, struct panfrost_mmu *mmu);
void panfrost_mmu_as_put(struct panfrost_device *pfdev, struct panfrost_mmu *mmu);
-int panfrost_mmu_pgtable_alloc(struct panfrost_file_priv *priv);
-void panfrost_mmu_pgtable_free(struct panfrost_file_priv *priv);
+struct panfrost_mmu *panfrost_mmu_ctx_get(struct panfrost_mmu *mmu);
+void panfrost_mmu_ctx_put(struct panfrost_mmu *mmu);
+struct panfrost_mmu *panfrost_mmu_ctx_create(struct panfrost_device *pfdev);
#endif