// SPDX-License-Identifier: GPL-2.0
/* Copyright 2019 Linaro, Ltd, Rob Herring <robh@kernel.org> */
+#include <linux/atomic.h>
#include <linux/bitfield.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#define mmu_write(dev, reg, data) writel(data, dev->iomem + reg)
#define mmu_read(dev, reg) readl(dev->iomem + reg)
-struct panfrost_mmu {
- struct io_pgtable_cfg pgtbl_cfg;
- struct io_pgtable_ops *pgtbl_ops;
- struct mutex lock;
-};
-
static int wait_ready(struct panfrost_device *pfdev, u32 as_nr)
{
int ret;
}
-static int mmu_hw_do_operation(struct panfrost_device *pfdev, u32 as_nr,
- u64 iova, size_t size, u32 op)
+static int mmu_hw_do_operation(struct panfrost_device *pfdev,
+ struct panfrost_mmu *mmu,
+ u64 iova, size_t size, u32 op)
{
- unsigned long flags;
- int ret;
+ int ret, as_nr;
- spin_lock_irqsave(&pfdev->hwaccess_lock, flags);
+ spin_lock(&pfdev->as_lock);
+ as_nr = mmu->as;
+
+ if (as_nr < 0) {
+ spin_unlock(&pfdev->as_lock);
+ return 0;
+ }
if (op != AS_COMMAND_UNLOCK)
lock_region(pfdev, as_nr, iova, size);
/* Wait for the flush to complete */
ret = wait_ready(pfdev, as_nr);
- spin_unlock_irqrestore(&pfdev->hwaccess_lock, flags);
+ spin_unlock(&pfdev->as_lock);
return ret;
}
-static void panfrost_mmu_enable(struct panfrost_device *pfdev, u32 as_nr)
+static void panfrost_mmu_enable(struct panfrost_device *pfdev, struct panfrost_mmu *mmu)
{
- struct io_pgtable_cfg *cfg = &pfdev->mmu->pgtbl_cfg;
+ int as_nr = mmu->as;
+ struct io_pgtable_cfg *cfg = &mmu->pgtbl_cfg;
u64 transtab = cfg->arm_mali_lpae_cfg.transtab;
u64 memattr = cfg->arm_mali_lpae_cfg.memattr;
write_cmd(pfdev, as_nr, AS_COMMAND_UPDATE);
}
+u32 panfrost_mmu_as_get(struct panfrost_device *pfdev, struct panfrost_mmu *mmu)
+{
+ int as;
+
+ spin_lock(&pfdev->as_lock);
+
+ as = mmu->as;
+ if (as >= 0) {
+ int en = atomic_inc_return(&mmu->as_count);
+ WARN_ON(en >= NUM_JOB_SLOTS);
+
+ list_move(&mmu->list, &pfdev->as_lru_list);
+ goto out;
+ }
+
+ /* Check for a free AS */
+ as = ffz(pfdev->as_alloc_mask);
+ if (!(BIT(as) & pfdev->features.as_present)) {
+ struct panfrost_mmu *lru_mmu;
+
+ list_for_each_entry_reverse(lru_mmu, &pfdev->as_lru_list, list) {
+ if (!atomic_read(&lru_mmu->as_count))
+ break;
+ }
+ WARN_ON(&lru_mmu->list == &pfdev->as_lru_list);
+
+ list_del_init(&lru_mmu->list);
+ as = lru_mmu->as;
+
+ WARN_ON(as < 0);
+ lru_mmu->as = -1;
+ }
+
+ /* Assign the free or reclaimed AS to the FD */
+ mmu->as = as;
+ set_bit(as, &pfdev->as_alloc_mask);
+ atomic_set(&mmu->as_count, 1);
+ list_add(&mmu->list, &pfdev->as_lru_list);
+
+ dev_dbg(pfdev->dev, "Assigned AS%d to mmu %p, alloc_mask=%lx", as, mmu, pfdev->as_alloc_mask);
+
+ panfrost_mmu_enable(pfdev, mmu);
+
+out:
+ spin_unlock(&pfdev->as_lock);
+ return as;
+}
+
+void panfrost_mmu_as_put(struct panfrost_device *pfdev, struct panfrost_mmu *mmu)
+{
+ atomic_dec(&mmu->as_count);
+ WARN_ON(atomic_read(&mmu->as_count) < 0);
+}
+
void panfrost_mmu_reset(struct panfrost_device *pfdev)
{
- panfrost_mmu_enable(pfdev, 0);
+ struct panfrost_mmu *mmu, *mmu_tmp;
+
+ spin_lock(&pfdev->as_lock);
+
+ pfdev->as_alloc_mask = 0;
+
+ list_for_each_entry_safe(mmu, mmu_tmp, &pfdev->as_lru_list, list) {
+ mmu->as = -1;
+ atomic_set(&mmu->as_count, 0);
+ list_del_init(&mmu->list);
+ }
+
+ spin_unlock(&pfdev->as_lock);
mmu_write(pfdev, MMU_INT_CLEAR, ~0);
mmu_write(pfdev, MMU_INT_MASK, ~0);
return SZ_2M;
}
-static int mmu_map_sg(struct panfrost_device *pfdev, u64 iova,
- int prot, struct sg_table *sgt)
+static int mmu_map_sg(struct panfrost_device *pfdev, struct panfrost_mmu *mmu,
+ u64 iova, int prot, struct sg_table *sgt)
{
unsigned int count;
struct scatterlist *sgl;
- struct io_pgtable_ops *ops = pfdev->mmu->pgtbl_ops;
+ struct io_pgtable_ops *ops = mmu->pgtbl_ops;
u64 start_iova = iova;
- mutex_lock(&pfdev->mmu->lock);
+ mutex_lock(&mmu->lock);
for_each_sg(sgt->sgl, sgl, sgt->nents, count) {
unsigned long paddr = sg_dma_address(sgl);
size_t len = sg_dma_len(sgl);
- dev_dbg(pfdev->dev, "map: iova=%llx, paddr=%lx, len=%zx", iova, paddr, len);
+ dev_dbg(pfdev->dev, "map: as=%d, iova=%llx, paddr=%lx, len=%zx", mmu->as, iova, paddr, len);
while (len) {
size_t pgsize = get_pgsize(iova | paddr, len);
}
}
- mmu_hw_do_operation(pfdev, 0, start_iova, iova - start_iova,
+ mmu_hw_do_operation(pfdev, mmu, start_iova, iova - start_iova,
AS_COMMAND_FLUSH_PT);
- mutex_unlock(&pfdev->mmu->lock);
+ mutex_unlock(&mmu->lock);
return 0;
}
if (ret < 0)
return ret;
- mmu_map_sg(pfdev, bo->node.start << PAGE_SHIFT, prot, sgt);
+ mmu_map_sg(pfdev, bo->mmu, bo->node.start << PAGE_SHIFT, prot, sgt);
pm_runtime_mark_last_busy(pfdev->dev);
pm_runtime_put_autosuspend(pfdev->dev);
{
struct drm_gem_object *obj = &bo->base.base;
struct panfrost_device *pfdev = to_panfrost_device(obj->dev);
- struct io_pgtable_ops *ops = pfdev->mmu->pgtbl_ops;
+ struct io_pgtable_ops *ops = bo->mmu->pgtbl_ops;
u64 iova = bo->node.start << PAGE_SHIFT;
size_t len = bo->node.size << PAGE_SHIFT;
size_t unmapped_len = 0;
if (WARN_ON(!bo->is_mapped))
return;
- dev_dbg(pfdev->dev, "unmap: iova=%llx, len=%zx", iova, len);
+ dev_dbg(pfdev->dev, "unmap: as=%d, iova=%llx, len=%zx", bo->mmu->as, iova, len);
ret = pm_runtime_get_sync(pfdev->dev);
if (ret < 0)
return;
- mutex_lock(&pfdev->mmu->lock);
+ mutex_lock(&bo->mmu->lock);
while (unmapped_len < len) {
size_t unmapped_page;
unmapped_len += pgsize;
}
- mmu_hw_do_operation(pfdev, 0, bo->node.start << PAGE_SHIFT,
+ mmu_hw_do_operation(pfdev, bo->mmu, bo->node.start << PAGE_SHIFT,
bo->node.size << PAGE_SHIFT, AS_COMMAND_FLUSH_PT);
- mutex_unlock(&pfdev->mmu->lock);
+ mutex_unlock(&bo->mmu->lock);
pm_runtime_mark_last_busy(pfdev->dev);
pm_runtime_put_autosuspend(pfdev->dev);
static void mmu_tlb_inv_context_s1(void *cookie)
{
- struct panfrost_device *pfdev = cookie;
+ struct panfrost_file_priv *priv = cookie;
- mmu_hw_do_operation(pfdev, 0, 0, ~0UL, AS_COMMAND_FLUSH_MEM);
+ mmu_hw_do_operation(priv->pfdev, &priv->mmu, 0, ~0UL, AS_COMMAND_FLUSH_MEM);
}
static void mmu_tlb_inv_range_nosync(unsigned long iova, size_t size,
.tlb_sync = mmu_tlb_sync_context,
};
+int panfrost_mmu_pgtable_alloc(struct panfrost_file_priv *priv)
+{
+ struct panfrost_mmu *mmu = &priv->mmu;
+ struct panfrost_device *pfdev = priv->pfdev;
+
+ mutex_init(&mmu->lock);
+ 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) {
+ 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 drm_mm_node *addr_to_drm_mm_node(struct panfrost_device *pfdev, int as, u64 addr)
{
- struct drm_mm_node *node;
+ struct drm_mm_node *node = NULL;
u64 offset = addr >> PAGE_SHIFT;
+ struct panfrost_mmu *mmu;
- drm_mm_for_each_node(node, &pfdev->mm) {
- if (offset >= node->start && offset < (node->start + node->size))
- return node;
+ spin_lock(&pfdev->as_lock);
+ list_for_each_entry(mmu, &pfdev->as_lru_list, list) {
+ struct panfrost_file_priv *priv;
+ if (as != mmu->as)
+ continue;
+
+ priv = container_of(mmu, struct panfrost_file_priv, mmu);
+ drm_mm_for_each_node(node, &priv->mm) {
+ if (offset >= node->start && offset < (node->start + node->size))
+ goto out;
+ }
}
- return NULL;
+
+out:
+ spin_unlock(&pfdev->as_lock);
+ return node;
}
#define NUM_FAULT_PAGES (SZ_2M / PAGE_SIZE)
node->start << PAGE_SHIFT);
return -EINVAL;
}
+ WARN_ON(bo->mmu->as != as);
+
/* Assume 2MB alignment and size multiple */
addr &= ~((u64)SZ_2M - 1);
page_offset = addr >> PAGE_SHIFT;
goto err_map;
}
- mmu_map_sg(pfdev, addr, IOMMU_WRITE | IOMMU_READ | IOMMU_NOEXEC, sgt);
+ mmu_map_sg(pfdev, bo->mmu, addr, IOMMU_WRITE | IOMMU_READ | IOMMU_NOEXEC, sgt);
bo->is_mapped = true;
- dev_dbg(pfdev->dev, "mapped page fault @ %llx", addr);
+ dev_dbg(pfdev->dev, "mapped page fault @ AS%d %llx", as, addr);
return 0;
int panfrost_mmu_init(struct panfrost_device *pfdev)
{
- struct io_pgtable_ops *pgtbl_ops;
int err, irq;
- pfdev->mmu = devm_kzalloc(pfdev->dev, sizeof(*pfdev->mmu), GFP_KERNEL);
- if (!pfdev->mmu)
- return -ENOMEM;
-
- mutex_init(&pfdev->mmu->lock);
-
irq = platform_get_irq_byname(to_platform_device(pfdev->dev), "mmu");
if (irq <= 0)
return -ENODEV;
dev_err(pfdev->dev, "failed to request mmu irq");
return err;
}
- pfdev->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,
- };
-
- pgtbl_ops = alloc_io_pgtable_ops(ARM_MALI_LPAE, &pfdev->mmu->pgtbl_cfg,
- pfdev);
- if (!pgtbl_ops)
- return -ENOMEM;
-
- pfdev->mmu->pgtbl_ops = pgtbl_ops;
-
- panfrost_mmu_enable(pfdev, 0);
return 0;
}
{
mmu_write(pfdev, MMU_INT_MASK, 0);
mmu_disable(pfdev, 0);
-
- free_io_pgtable_ops(pfdev->mmu->pgtbl_ops);
}
projects / mirror_ubuntu-hirsute-kernel.git / commitdiff