From 9999e48639b3cecb08ffb37358bcba3b48161b29 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 08:50:17 +0000
Subject: [PATCH] add ax88772_rst
---
kernel/drivers/gpu/drm/omapdrm/omap_gem.c | 174 ++++++++++++++++++++++++++++++++++------------------------
1 files changed, 102 insertions(+), 72 deletions(-)
diff --git a/kernel/drivers/gpu/drm/omapdrm/omap_gem.c b/kernel/drivers/gpu/drm/omapdrm/omap_gem.c
index 4ba5d03..f67f223 100644
--- a/kernel/drivers/gpu/drm/omapdrm/omap_gem.c
+++ b/kernel/drivers/gpu/drm/omapdrm/omap_gem.c
@@ -1,25 +1,16 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
* Author: Rob Clark <rob.clark@linaro.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#include <linux/dma-mapping.h>
#include <linux/seq_file.h>
#include <linux/shmem_fs.h>
#include <linux/spinlock.h>
#include <linux/pfn_t.h>
+#include <drm/drm_prime.h>
#include <drm/drm_vma_manager.h>
#include "omap_drv.h"
@@ -76,7 +67,7 @@
/**
* # of users of dma_addr
*/
- u32 dma_addr_cnt;
+ refcount_t dma_addr_cnt;
/**
* If the buffer has been imported from a dmabuf the OMAP_DB_DMABUF flag
@@ -205,7 +196,7 @@
struct omap_gem_object *omap_obj = to_omap_bo(obj);
struct omap_drm_private *priv = obj->dev->dev_private;
- if (omap_obj->flags & OMAP_BO_TILED) {
+ if (omap_obj->flags & OMAP_BO_TILED_MASK) {
enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
int i;
@@ -333,7 +324,7 @@
struct omap_gem_object *omap_obj = to_omap_bo(obj);
size_t size = obj->size;
- if (omap_obj->flags & OMAP_BO_TILED) {
+ if (omap_obj->flags & OMAP_BO_TILED_MASK) {
/* for tiled buffers, the virtual size has stride rounded up
* to 4kb.. (to hide the fact that row n+1 might start 16kb or
* 32kb later!). But we don't back the entire buffer with
@@ -522,7 +513,7 @@
* probably trigger put_pages()?
*/
- if (omap_obj->flags & OMAP_BO_TILED)
+ if (omap_obj->flags & OMAP_BO_TILED_MASK)
ret = omap_gem_fault_2d(obj, vma, vmf);
else
ret = omap_gem_fault_1d(obj, vma, vmf);
@@ -638,7 +629,7 @@
*offset = omap_gem_mmap_offset(obj);
- drm_gem_object_unreference_unlocked(obj);
+ drm_gem_object_put(obj);
fail:
return ret;
@@ -782,18 +773,20 @@
mutex_lock(&omap_obj->lock);
if (!omap_gem_is_contiguous(omap_obj) && priv->has_dmm) {
- if (omap_obj->dma_addr_cnt == 0) {
+ if (refcount_read(&omap_obj->dma_addr_cnt) == 0) {
u32 npages = obj->size >> PAGE_SHIFT;
enum tiler_fmt fmt = gem2fmt(omap_obj->flags);
struct tiler_block *block;
BUG_ON(omap_obj->block);
+ refcount_set(&omap_obj->dma_addr_cnt, 1);
+
ret = omap_gem_attach_pages(obj);
if (ret)
goto fail;
- if (omap_obj->flags & OMAP_BO_TILED) {
+ if (omap_obj->flags & OMAP_BO_TILED_MASK) {
block = tiler_reserve_2d(fmt,
omap_obj->width,
omap_obj->height, 0);
@@ -822,13 +815,15 @@
omap_obj->block = block;
DBG("got dma address: %pad", &omap_obj->dma_addr);
+ } else {
+ refcount_inc(&omap_obj->dma_addr_cnt);
}
- omap_obj->dma_addr_cnt++;
-
- *dma_addr = omap_obj->dma_addr;
+ if (dma_addr)
+ *dma_addr = omap_obj->dma_addr;
} else if (omap_gem_is_contiguous(omap_obj)) {
- *dma_addr = omap_obj->dma_addr;
+ if (dma_addr)
+ *dma_addr = omap_obj->dma_addr;
} else {
ret = -EINVAL;
goto fail;
@@ -841,38 +836,50 @@
}
/**
+ * omap_gem_unpin_locked() - Unpin a GEM object from memory
+ * @obj: the GEM object
+ *
+ * omap_gem_unpin() without locking.
+ */
+static void omap_gem_unpin_locked(struct drm_gem_object *obj)
+{
+ struct omap_drm_private *priv = obj->dev->dev_private;
+ struct omap_gem_object *omap_obj = to_omap_bo(obj);
+ int ret;
+
+ if (omap_gem_is_contiguous(omap_obj) || !priv->has_dmm)
+ return;
+
+ if (refcount_dec_and_test(&omap_obj->dma_addr_cnt)) {
+ ret = tiler_unpin(omap_obj->block);
+ if (ret) {
+ dev_err(obj->dev->dev,
+ "could not unpin pages: %d\n", ret);
+ }
+ ret = tiler_release(omap_obj->block);
+ if (ret) {
+ dev_err(obj->dev->dev,
+ "could not release unmap: %d\n", ret);
+ }
+ omap_obj->dma_addr = 0;
+ omap_obj->block = NULL;
+ }
+}
+
+/**
* omap_gem_unpin() - Unpin a GEM object from memory
* @obj: the GEM object
*
* Unpin the given GEM object previously pinned with omap_gem_pin(). Pins are
- * reference-counted, the actualy unpin will only be performed when the number
+ * reference-counted, the actual unpin will only be performed when the number
* of calls to this function matches the number of calls to omap_gem_pin().
*/
void omap_gem_unpin(struct drm_gem_object *obj)
{
struct omap_gem_object *omap_obj = to_omap_bo(obj);
- int ret;
mutex_lock(&omap_obj->lock);
-
- if (omap_obj->dma_addr_cnt > 0) {
- omap_obj->dma_addr_cnt--;
- if (omap_obj->dma_addr_cnt == 0) {
- ret = tiler_unpin(omap_obj->block);
- if (ret) {
- dev_err(obj->dev->dev,
- "could not unpin pages: %d\n", ret);
- }
- ret = tiler_release(omap_obj->block);
- if (ret) {
- dev_err(obj->dev->dev,
- "could not release unmap: %d\n", ret);
- }
- omap_obj->dma_addr = 0;
- omap_obj->block = NULL;
- }
- }
-
+ omap_gem_unpin_locked(obj);
mutex_unlock(&omap_obj->lock);
}
@@ -888,8 +895,8 @@
mutex_lock(&omap_obj->lock);
- if ((omap_obj->dma_addr_cnt > 0) && omap_obj->block &&
- (omap_obj->flags & OMAP_BO_TILED)) {
+ if ((refcount_read(&omap_obj->dma_addr_cnt) > 0) && omap_obj->block &&
+ (omap_obj->flags & OMAP_BO_TILED_MASK)) {
*dma_addr = tiler_tsptr(omap_obj->block, orient, x, y);
ret = 0;
}
@@ -904,7 +911,7 @@
{
struct omap_gem_object *omap_obj = to_omap_bo(obj);
int ret = -EINVAL;
- if (omap_obj->flags & OMAP_BO_TILED)
+ if (omap_obj->flags & OMAP_BO_TILED_MASK)
ret = tiler_stride(gem2fmt(omap_obj->flags), orient);
return ret;
}
@@ -1039,10 +1046,11 @@
seq_printf(m, "%08x: %2d (%2d) %08llx %pad (%2d) %p %4d",
omap_obj->flags, obj->name, kref_read(&obj->refcount),
- off, &omap_obj->dma_addr, omap_obj->dma_addr_cnt,
+ off, &omap_obj->dma_addr,
+ refcount_read(&omap_obj->dma_addr_cnt),
omap_obj->vaddr, omap_obj->roll);
- if (omap_obj->flags & OMAP_BO_TILED) {
+ if (omap_obj->flags & OMAP_BO_TILED_MASK) {
seq_printf(m, " %dx%d", omap_obj->width, omap_obj->height);
if (omap_obj->block) {
struct tcm_area *area = &omap_obj->block->area;
@@ -1102,7 +1110,7 @@
mutex_lock(&omap_obj->lock);
/* The object should not be pinned. */
- WARN_ON(omap_obj->dma_addr_cnt > 0);
+ WARN_ON(refcount_read(&omap_obj->dma_addr_cnt) > 0);
if (omap_obj->pages) {
if (omap_obj->flags & OMAP_BO_MEM_DMABUF)
@@ -1129,6 +1137,38 @@
kfree(omap_obj);
}
+static bool omap_gem_validate_flags(struct drm_device *dev, u32 flags)
+{
+ struct omap_drm_private *priv = dev->dev_private;
+
+ switch (flags & OMAP_BO_CACHE_MASK) {
+ case OMAP_BO_CACHED:
+ case OMAP_BO_WC:
+ case OMAP_BO_CACHE_MASK:
+ break;
+
+ default:
+ return false;
+ }
+
+ if (flags & OMAP_BO_TILED_MASK) {
+ if (!priv->usergart)
+ return false;
+
+ switch (flags & OMAP_BO_TILED_MASK) {
+ case OMAP_BO_TILED_8:
+ case OMAP_BO_TILED_16:
+ case OMAP_BO_TILED_32:
+ break;
+
+ default:
+ return false;
+ }
+ }
+
+ return true;
+}
+
/* GEM buffer object constructor */
struct drm_gem_object *omap_gem_new(struct drm_device *dev,
union omap_gem_size gsize, u32 flags)
@@ -1140,18 +1180,15 @@
size_t size;
int ret;
- /* Validate the flags and compute the memory and cache flags. */
- if (flags & OMAP_BO_TILED) {
- if (!priv->usergart) {
- dev_err(dev->dev, "Tiled buffers require DMM\n");
- return NULL;
- }
+ if (!omap_gem_validate_flags(dev, flags))
+ return NULL;
+ /* Validate the flags and compute the memory and cache flags. */
+ if (flags & OMAP_BO_TILED_MASK) {
/*
* Tiled buffers are always shmem paged backed. When they are
* scanned out, they are remapped into DMM/TILER.
*/
- flags &= ~OMAP_BO_SCANOUT;
flags |= OMAP_BO_MEM_SHMEM;
/*
@@ -1162,9 +1199,8 @@
flags |= tiler_get_cpu_cache_flags();
} else if ((flags & OMAP_BO_SCANOUT) && !priv->has_dmm) {
/*
- * OMAP_BO_SCANOUT hints that the buffer doesn't need to be
- * tiled. However, to lower the pressure on memory allocation,
- * use contiguous memory only if no TILER is available.
+ * If we don't have DMM, we must allocate scanout buffers
+ * from contiguous DMA memory.
*/
flags |= OMAP_BO_MEM_DMA_API;
} else if (!(flags & OMAP_BO_MEM_DMABUF)) {
@@ -1183,7 +1219,7 @@
omap_obj->flags = flags;
mutex_init(&omap_obj->lock);
- if (flags & OMAP_BO_TILED) {
+ if (flags & OMAP_BO_TILED_MASK) {
/*
* For tiled buffers align dimensions to slot boundaries and
* calculate size based on aligned dimensions.
@@ -1261,10 +1297,9 @@
omap_obj->dma_addr = sg_dma_address(sgt->sgl);
} else {
/* Create pages list from sgt */
- struct sg_page_iter iter;
struct page **pages;
unsigned int npages;
- unsigned int i = 0;
+ unsigned int ret;
npages = DIV_ROUND_UP(size, PAGE_SIZE);
pages = kcalloc(npages, sizeof(*pages), GFP_KERNEL);
@@ -1275,14 +1310,9 @@
}
omap_obj->pages = pages;
-
- for_each_sg_page(sgt->sgl, &iter, sgt->orig_nents, 0) {
- pages[i++] = sg_page_iter_page(&iter);
- if (i > npages)
- break;
- }
-
- if (WARN_ON(i != npages)) {
+ ret = drm_prime_sg_to_page_addr_arrays(sgt, pages, NULL,
+ npages);
+ if (ret) {
omap_gem_free_object(obj);
obj = ERR_PTR(-ENOMEM);
goto done;
@@ -1312,7 +1342,7 @@
}
/* drop reference from allocate - handle holds it now */
- drm_gem_object_unreference_unlocked(obj);
+ drm_gem_object_put(obj);
return 0;
}
--
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