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authorLinus Torvalds <torvalds@linux-foundation.org>2022-08-03 19:52:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-08-03 19:52:08 -0700
commitb44f2fd87919b5ae6e1756d4c7ba2cbba22238e1 (patch)
tree01ce17e44375c3f7707640bb44d6e012bab878c4 /drivers/dma-buf
parent12b68040a5e468068fd7f4af1150eab8f6e96235 (diff)
parent5493ee1919eae4f49d62276cf5986b7f7c7aa8f6 (diff)
Merge tag 'drm-next-2022-08-03' of git://anongit.freedesktop.org/drm/drm
Pull drm updates from Dave Airlie: "Highlights: - New driver for logicvc - which is a display IP core. - EDID parser rework to add new extensions - fbcon scrolling improvements - i915 has some more DG2 work but not enabled by default, but should have enough features for userspace to work now. Otherwise it's lots of work all over the place. Detailed summary: New driver: - logicvc vfio: - use aperture API core: - of: Add data-lane helpers and convert drivers - connector: Remove deprecated ida_simple_get() media: - Add various RGB666 and RGB888 format constants panel: - Add HannStar HSD101PWW - Add ETML0700Y5DHA dma-buf: - add sync-file API - set dma mask for udmabuf devices fbcon: - Improve scrolling performance - Sanitize input fbdev: - device unregistering fixes - vesa: Support COMPILE_TEST - Disable firmware-device registration when first native driver loads aperture: - fix segfault during hot-unplug - export for use with other subsystems client: - use driver validated modes dp: - aux: make probing more reliable - mst: Read extended DPCD capabilities during system resume - Support waiting for HDP signal - Port-validation fixes edid: - CEA data-block iterators - struct drm_edid introduction - implement HF-EEODB extension gem: - don't use fb format non-existing planes probe-helper: - use 640x480 as displayport fallback scheduler: - don't kill jobs in interrupt context bridge: - Add support for i.MX8qxp and i.MX8qm - lots of fixes/cleanups - Add TI-DLPC3433 - fy07024di26a30d: Optional GPIO reset - ldb: Add reg and reg-name properties to bindings, Kconfig fixes - lt9611: Fix display sensing; - tc358767: DSI/DPI refactoring and DSI-to-eDP support, DSI lane handling - tc358775: Fix clock settings - ti-sn65dsi83: Allow GPIO to sleep - adv7511: I2C fixes - anx7625: Fix error handling; DPI fixes; Implement HDP timeout via callback - fsl-ldb: Drop DE flip - ti-sn65dsi86: Convert to atomic modesetting amdgpu: - use atomic fence helpers in DM - fix VRAM address calculations - export CRTC bpc via debugfs - Initial devcoredump support - Enable high priority gfx queue on asics which support it - Adjust GART size on newer APUs for S/G display - Soft reset for GFX 11 / SDMA 6 - Add gfxoff status query for vangogh - Fix timestamps for cursor only commits - Adjust GART size on newer APUs for S/G display - fix buddy memory corruption amdkfd: - MMU notifier fixes - P2P DMA support using dma-buf - Add available memory IOCTL - HMM profiler support - Simplify GPUVM validation - Unified memory for CWSR save/restore area i915: - General driver clean-up - DG2 enabling (still under force probe) - DG2 small BAR memory support - HuC loading support - DG2 workarounds - DG2/ATS-M device IDs added - Ponte Vecchio prep work and new blitter engines - add Meteorlake support - Fix sparse warnings - DMC MMIO range checks - Audio related fixes - Runtime PM fixes - PSR fixes - Media freq factor and per-gt enhancements - DSI fixes for ICL+ - Disable DMC flip queue handlers - ADL_P voltage swing updates - Use more the VBT for panel information - Fix on Type-C ports with TBT mode - Improve fastset and allow seamless M/N changes - Accept more fixed modes with VRR/DMRRS panels - Disable connector polling for a headless SKU - ADL-S display PLL w/a - Enable THP on Icelake and beyond - Fix i915_gem_object_ggtt_pin_ww regression on old platforms - Expose per tile media freq factor in sysfs - Fix dma_resv fence handling in multi-batch execbuf - Improve on suspend / resume time with VT-d enabled - export CRTC bpc settings via debugfs msm: - gpu: a619 support - gpu: Fix for unclocked GMU register access - gpu: Devcore dump enhancements - client utilization via fdinfo support - fix fence rollover issue - gem: Lockdep false-positive warning fix - gem: Switch to pfn mappings - WB support on sc7180 - dp: dropped custom bulk clock implementation - fix link retraining on resolution change - hdmi: dropped obsolete GPIO support tegra: - context isolation for host1x engines - tegra234 soc support mediatek: - add vdosys0/1 for mt8195 - add MT8195 dp_intf driver exynos: - Fix resume function issue of exynos decon driver by calling clk_disable_unprepare() properly if clk_prepare_enable() failed. nouveau: - set of misc fixes/cleanups - display cleanups gma500: - Cleanup connector I2C handling hyperv: - Unify VRAM allocation of Gen1 and Gen2 meson: - Support YUV422 output; Refcount fixes mgag200: - Support damage clipping - Support gamma handling - Protect concurrent HW access - Fixes to connector - Store model-specific limits in device-info structure - fix PCI register init panfrost: - Valhall support r128: - Fix bit-shift overflow rockchip: - Locking fixes in error path ssd130x: - Fix built-in linkage udl: - Always advertize VGA connector ast: - Support multiple outputs - fix black screen on resume sun4i: - HDMI PHY cleanups vc4: - Add support for BCM2711 vkms: - Allocate output buffer with vmalloc() mcde: - Fix ref-count leak mxsfb/lcdif: - Support i.MX8MP LCD controller stm/ltdc: - Support dynamic Z order - Support mirroring ingenic: - Fix display at maximum resolution" * tag 'drm-next-2022-08-03' of git://anongit.freedesktop.org/drm/drm: (1480 commits) drm/amd/display: Fix a compilation failure on PowerPC caused by FPU code drm/amdgpu: enable support for psp 13.0.4 block drm/amdgpu: add files for PSP 13.0.4 drm/amdgpu: add header files for MP 13.0.4 drm/amdgpu: correct RLC_RLCS_BOOTLOAD_STATUS offset and index drm/amdgpu: send msg to IMU for the front-door loading drm/amdkfd: use time_is_before_jiffies(a + b) to replace "jiffies - a > b" drm/amdgpu: fix hive reference leak when reflecting psp topology info drm/amd/pm: enable GFX ULV feature support for SMU13.0.0 drm/amd/pm: update driver if header for SMU 13.0.0 drm/amdgpu: move mes self test after drm sched re-started drm/amdgpu: drop non-necessary call trace dump drm/amdgpu: enable VCN cg and JPEG cg/pg drm/amdgpu: vcn_4_0_2 video codec query drm/amdgpu: add VCN_4_0_2 firmware support drm/amdgpu: add VCN function in NBIO v7.7 drm/amdgpu: fix a vcn4 boot poll bug in emulation mode drm/amd/amdgpu: add memory training support for PSP_V13 drm/amdkfd: remove an unnecessary amdgpu_bo_ref drm/amd/pm: Add get_gfx_off_status interface for yellow carp ...
Diffstat (limited to 'drivers/dma-buf')
-rw-r--r--drivers/dma-buf/Kconfig6
-rw-r--r--drivers/dma-buf/Makefile2
-rw-r--r--drivers/dma-buf/dma-buf.c110
-rw-r--r--drivers/dma-buf/dma-fence-chain.c4
-rw-r--r--drivers/dma-buf/dma-fence-unwrap.c163
-rw-r--r--drivers/dma-buf/st-dma-fence-unwrap.c157
-rw-r--r--drivers/dma-buf/sync_file.c119
-rw-r--r--drivers/dma-buf/udmabuf.c18
8 files changed, 430 insertions, 149 deletions
diff --git a/drivers/dma-buf/Kconfig b/drivers/dma-buf/Kconfig
index 541efe01abc7..e4dc53a36428 100644
--- a/drivers/dma-buf/Kconfig
+++ b/drivers/dma-buf/Kconfig
@@ -75,7 +75,7 @@ menuconfig DMABUF_HEAPS
between drivers.
menuconfig DMABUF_SYSFS_STATS
- bool "DMA-BUF sysfs statistics"
+ bool "DMA-BUF sysfs statistics (DEPRECATED)"
depends on DMA_SHARED_BUFFER
help
Choose this option to enable DMA-BUF sysfs statistics
@@ -85,6 +85,10 @@ menuconfig DMABUF_SYSFS_STATS
statistics for the DMA-BUF with the unique inode number
<inode_number>.
+ This option is deprecated and should sooner or later be removed.
+ Android is the only user of this and it turned out that this resulted
+ in quite some performance problems.
+
source "drivers/dma-buf/heaps/Kconfig"
endmenu
diff --git a/drivers/dma-buf/Makefile b/drivers/dma-buf/Makefile
index 4c9eb53ba3f8..70ec901edf2c 100644
--- a/drivers/dma-buf/Makefile
+++ b/drivers/dma-buf/Makefile
@@ -1,6 +1,6 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-y := dma-buf.o dma-fence.o dma-fence-array.o dma-fence-chain.o \
- dma-resv.o
+ dma-fence-unwrap.o dma-resv.o
obj-$(CONFIG_DMABUF_HEAPS) += dma-heap.o
obj-$(CONFIG_DMABUF_HEAPS) += heaps/
obj-$(CONFIG_SYNC_FILE) += sync_file.o
diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c
index 3f08e0b960ec..efb4990b29e1 100644
--- a/drivers/dma-buf/dma-buf.c
+++ b/drivers/dma-buf/dma-buf.c
@@ -20,6 +20,7 @@
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/seq_file.h>
+#include <linux/sync_file.h>
#include <linux/poll.h>
#include <linux/dma-resv.h>
#include <linux/mm.h>
@@ -192,6 +193,9 @@ static loff_t dma_buf_llseek(struct file *file, loff_t offset, int whence)
* Note that this only signals the completion of the respective fences, i.e. the
* DMA transfers are complete. Cache flushing and any other necessary
* preparations before CPU access can begin still need to happen.
+ *
+ * As an alternative to poll(), the set of fences on DMA buffer can be
+ * exported as a &sync_file using &dma_buf_sync_file_export.
*/
static void dma_buf_poll_cb(struct dma_fence *fence, struct dma_fence_cb *cb)
@@ -326,6 +330,101 @@ static long dma_buf_set_name(struct dma_buf *dmabuf, const char __user *buf)
return 0;
}
+#if IS_ENABLED(CONFIG_SYNC_FILE)
+static long dma_buf_export_sync_file(struct dma_buf *dmabuf,
+ void __user *user_data)
+{
+ struct dma_buf_export_sync_file arg;
+ enum dma_resv_usage usage;
+ struct dma_fence *fence = NULL;
+ struct sync_file *sync_file;
+ int fd, ret;
+
+ if (copy_from_user(&arg, user_data, sizeof(arg)))
+ return -EFAULT;
+
+ if (arg.flags & ~DMA_BUF_SYNC_RW)
+ return -EINVAL;
+
+ if ((arg.flags & DMA_BUF_SYNC_RW) == 0)
+ return -EINVAL;
+
+ fd = get_unused_fd_flags(O_CLOEXEC);
+ if (fd < 0)
+ return fd;
+
+ usage = dma_resv_usage_rw(arg.flags & DMA_BUF_SYNC_WRITE);
+ ret = dma_resv_get_singleton(dmabuf->resv, usage, &fence);
+ if (ret)
+ goto err_put_fd;
+
+ if (!fence)
+ fence = dma_fence_get_stub();
+
+ sync_file = sync_file_create(fence);
+
+ dma_fence_put(fence);
+
+ if (!sync_file) {
+ ret = -ENOMEM;
+ goto err_put_fd;
+ }
+
+ arg.fd = fd;
+ if (copy_to_user(user_data, &arg, sizeof(arg))) {
+ ret = -EFAULT;
+ goto err_put_file;
+ }
+
+ fd_install(fd, sync_file->file);
+
+ return 0;
+
+err_put_file:
+ fput(sync_file->file);
+err_put_fd:
+ put_unused_fd(fd);
+ return ret;
+}
+
+static long dma_buf_import_sync_file(struct dma_buf *dmabuf,
+ const void __user *user_data)
+{
+ struct dma_buf_import_sync_file arg;
+ struct dma_fence *fence;
+ enum dma_resv_usage usage;
+ int ret = 0;
+
+ if (copy_from_user(&arg, user_data, sizeof(arg)))
+ return -EFAULT;
+
+ if (arg.flags & ~DMA_BUF_SYNC_RW)
+ return -EINVAL;
+
+ if ((arg.flags & DMA_BUF_SYNC_RW) == 0)
+ return -EINVAL;
+
+ fence = sync_file_get_fence(arg.fd);
+ if (!fence)
+ return -EINVAL;
+
+ usage = (arg.flags & DMA_BUF_SYNC_WRITE) ? DMA_RESV_USAGE_WRITE :
+ DMA_RESV_USAGE_READ;
+
+ dma_resv_lock(dmabuf->resv, NULL);
+
+ ret = dma_resv_reserve_fences(dmabuf->resv, 1);
+ if (!ret)
+ dma_resv_add_fence(dmabuf->resv, fence, usage);
+
+ dma_resv_unlock(dmabuf->resv);
+
+ dma_fence_put(fence);
+
+ return ret;
+}
+#endif
+
static long dma_buf_ioctl(struct file *file,
unsigned int cmd, unsigned long arg)
{
@@ -369,6 +468,13 @@ static long dma_buf_ioctl(struct file *file,
case DMA_BUF_SET_NAME_B:
return dma_buf_set_name(dmabuf, (const char __user *)arg);
+#if IS_ENABLED(CONFIG_SYNC_FILE)
+ case DMA_BUF_IOCTL_EXPORT_SYNC_FILE:
+ return dma_buf_export_sync_file(dmabuf, (void __user *)arg);
+ case DMA_BUF_IOCTL_IMPORT_SYNC_FILE:
+ return dma_buf_import_sync_file(dmabuf, (const void __user *)arg);
+#endif
+
default:
return -ENOTTY;
}
@@ -1358,7 +1464,7 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused)
return ret;
seq_puts(s, "\nDma-buf Objects:\n");
- seq_printf(s, "%-8s\t%-8s\t%-8s\t%-8s\texp_name\t%-8s\n",
+ seq_printf(s, "%-8s\t%-8s\t%-8s\t%-8s\texp_name\t%-8s\tname\n",
"size", "flags", "mode", "count", "ino");
list_for_each_entry(buf_obj, &db_list.head, list_node) {
@@ -1375,7 +1481,7 @@ static int dma_buf_debug_show(struct seq_file *s, void *unused)
file_count(buf_obj->file),
buf_obj->exp_name,
file_inode(buf_obj->file)->i_ino,
- buf_obj->name ?: "");
+ buf_obj->name ?: "<none>");
spin_unlock(&buf_obj->name_lock);
dma_resv_describe(buf_obj->resv, s);
diff --git a/drivers/dma-buf/dma-fence-chain.c b/drivers/dma-buf/dma-fence-chain.c
index 06f8ef97c6e8..a0d920576ba6 100644
--- a/drivers/dma-buf/dma-fence-chain.c
+++ b/drivers/dma-buf/dma-fence-chain.c
@@ -62,8 +62,8 @@ struct dma_fence *dma_fence_chain_walk(struct dma_fence *fence)
replacement = NULL;
}
- tmp = cmpxchg((struct dma_fence __force **)&chain->prev,
- prev, replacement);
+ tmp = unrcu_pointer(cmpxchg(&chain->prev, RCU_INITIALIZER(prev),
+ RCU_INITIALIZER(replacement)));
if (tmp == prev)
dma_fence_put(tmp);
else
diff --git a/drivers/dma-buf/dma-fence-unwrap.c b/drivers/dma-buf/dma-fence-unwrap.c
new file mode 100644
index 000000000000..7002bca792ff
--- /dev/null
+++ b/drivers/dma-buf/dma-fence-unwrap.c
@@ -0,0 +1,163 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * dma-fence-util: misc functions for dma_fence objects
+ *
+ * Copyright (C) 2022 Advanced Micro Devices, Inc.
+ * Authors:
+ * Christian König <christian.koenig@amd.com>
+ */
+
+#include <linux/dma-fence.h>
+#include <linux/dma-fence-array.h>
+#include <linux/dma-fence-chain.h>
+#include <linux/dma-fence-unwrap.h>
+#include <linux/slab.h>
+
+/* Internal helper to start new array iteration, don't use directly */
+static struct dma_fence *
+__dma_fence_unwrap_array(struct dma_fence_unwrap *cursor)
+{
+ cursor->array = dma_fence_chain_contained(cursor->chain);
+ cursor->index = 0;
+ return dma_fence_array_first(cursor->array);
+}
+
+/**
+ * dma_fence_unwrap_first - return the first fence from fence containers
+ * @head: the entrypoint into the containers
+ * @cursor: current position inside the containers
+ *
+ * Unwraps potential dma_fence_chain/dma_fence_array containers and return the
+ * first fence.
+ */
+struct dma_fence *dma_fence_unwrap_first(struct dma_fence *head,
+ struct dma_fence_unwrap *cursor)
+{
+ cursor->chain = dma_fence_get(head);
+ return __dma_fence_unwrap_array(cursor);
+}
+EXPORT_SYMBOL_GPL(dma_fence_unwrap_first);
+
+/**
+ * dma_fence_unwrap_next - return the next fence from a fence containers
+ * @cursor: current position inside the containers
+ *
+ * Continue unwrapping the dma_fence_chain/dma_fence_array containers and return
+ * the next fence from them.
+ */
+struct dma_fence *dma_fence_unwrap_next(struct dma_fence_unwrap *cursor)
+{
+ struct dma_fence *tmp;
+
+ ++cursor->index;
+ tmp = dma_fence_array_next(cursor->array, cursor->index);
+ if (tmp)
+ return tmp;
+
+ cursor->chain = dma_fence_chain_walk(cursor->chain);
+ return __dma_fence_unwrap_array(cursor);
+}
+EXPORT_SYMBOL_GPL(dma_fence_unwrap_next);
+
+/* Implementation for the dma_fence_merge() marco, don't use directly */
+struct dma_fence *__dma_fence_unwrap_merge(unsigned int num_fences,
+ struct dma_fence **fences,
+ struct dma_fence_unwrap *iter)
+{
+ struct dma_fence_array *result;
+ struct dma_fence *tmp, **array;
+ unsigned int i;
+ size_t count;
+
+ count = 0;
+ for (i = 0; i < num_fences; ++i) {
+ dma_fence_unwrap_for_each(tmp, &iter[i], fences[i])
+ if (!dma_fence_is_signaled(tmp))
+ ++count;
+ }
+
+ if (count == 0)
+ return dma_fence_get_stub();
+
+ array = kmalloc_array(count, sizeof(*array), GFP_KERNEL);
+ if (!array)
+ return NULL;
+
+ /*
+ * This trashes the input fence array and uses it as position for the
+ * following merge loop. This works because the dma_fence_merge()
+ * wrapper macro is creating this temporary array on the stack together
+ * with the iterators.
+ */
+ for (i = 0; i < num_fences; ++i)
+ fences[i] = dma_fence_unwrap_first(fences[i], &iter[i]);
+
+ count = 0;
+ do {
+ unsigned int sel;
+
+restart:
+ tmp = NULL;
+ for (i = 0; i < num_fences; ++i) {
+ struct dma_fence *next;
+
+ while (fences[i] && dma_fence_is_signaled(fences[i]))
+ fences[i] = dma_fence_unwrap_next(&iter[i]);
+
+ next = fences[i];
+ if (!next)
+ continue;
+
+ /*
+ * We can't guarantee that inpute fences are ordered by
+ * context, but it is still quite likely when this
+ * function is used multiple times. So attempt to order
+ * the fences by context as we pass over them and merge
+ * fences with the same context.
+ */
+ if (!tmp || tmp->context > next->context) {
+ tmp = next;
+ sel = i;
+
+ } else if (tmp->context < next->context) {
+ continue;
+
+ } else if (dma_fence_is_later(tmp, next)) {
+ fences[i] = dma_fence_unwrap_next(&iter[i]);
+ goto restart;
+ } else {
+ fences[sel] = dma_fence_unwrap_next(&iter[sel]);
+ goto restart;
+ }
+ }
+
+ if (tmp) {
+ array[count++] = dma_fence_get(tmp);
+ fences[sel] = dma_fence_unwrap_next(&iter[sel]);
+ }
+ } while (tmp);
+
+ if (count == 0) {
+ tmp = dma_fence_get_stub();
+ goto return_tmp;
+ }
+
+ if (count == 1) {
+ tmp = array[0];
+ goto return_tmp;
+ }
+
+ result = dma_fence_array_create(count, array,
+ dma_fence_context_alloc(1),
+ 1, false);
+ if (!result) {
+ tmp = NULL;
+ goto return_tmp;
+ }
+ return &result->base;
+
+return_tmp:
+ kfree(array);
+ return tmp;
+}
+EXPORT_SYMBOL_GPL(__dma_fence_unwrap_merge);
diff --git a/drivers/dma-buf/st-dma-fence-unwrap.c b/drivers/dma-buf/st-dma-fence-unwrap.c
index 039f016b57be..4105d5ea8dde 100644
--- a/drivers/dma-buf/st-dma-fence-unwrap.c
+++ b/drivers/dma-buf/st-dma-fence-unwrap.c
@@ -4,27 +4,19 @@
* Copyright (C) 2022 Advanced Micro Devices, Inc.
*/
+#include <linux/dma-fence.h>
+#include <linux/dma-fence-array.h>
+#include <linux/dma-fence-chain.h>
#include <linux/dma-fence-unwrap.h>
-#if 0
-#include <linux/kernel.h>
-#include <linux/kthread.h>
-#include <linux/mm.h>
-#include <linux/sched/signal.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/random.h>
-#endif
#include "selftest.h"
#define CHAIN_SZ (4 << 10)
-static inline struct mock_fence {
+struct mock_fence {
struct dma_fence base;
spinlock_t lock;
-} *to_mock_fence(struct dma_fence *f) {
- return container_of(f, struct mock_fence, base);
-}
+};
static const char *mock_name(struct dma_fence *f)
{
@@ -45,7 +37,8 @@ static struct dma_fence *mock_fence(void)
return NULL;
spin_lock_init(&f->lock);
- dma_fence_init(&f->base, &mock_ops, &f->lock, 0, 0);
+ dma_fence_init(&f->base, &mock_ops, &f->lock,
+ dma_fence_context_alloc(1), 1);
return &f->base;
}
@@ -59,7 +52,7 @@ static struct dma_fence *mock_array(unsigned int num_fences, ...)
fences = kcalloc(num_fences, sizeof(*fences), GFP_KERNEL);
if (!fences)
- return NULL;
+ goto error_put;
va_start(valist, num_fences);
for (i = 0; i < num_fences; ++i)
@@ -70,13 +63,17 @@ static struct dma_fence *mock_array(unsigned int num_fences, ...)
dma_fence_context_alloc(1),
1, false);
if (!array)
- goto cleanup;
+ goto error_free;
return &array->base;
-cleanup:
- for (i = 0; i < num_fences; ++i)
- dma_fence_put(fences[i]);
+error_free:
kfree(fences);
+
+error_put:
+ va_start(valist, num_fences);
+ for (i = 0; i < num_fences; ++i)
+ dma_fence_put(va_arg(valist, typeof(*fences)));
+ va_end(valist);
return NULL;
}
@@ -113,7 +110,6 @@ static int sanitycheck(void *arg)
if (!chain)
return -ENOMEM;
- dma_fence_signal(f);
dma_fence_put(chain);
return err;
}
@@ -154,10 +150,8 @@ static int unwrap_array(void *arg)
err = -EINVAL;
}
- dma_fence_signal(f1);
- dma_fence_signal(f2);
dma_fence_put(array);
- return 0;
+ return err;
}
static int unwrap_chain(void *arg)
@@ -196,10 +190,8 @@ static int unwrap_chain(void *arg)
err = -EINVAL;
}
- dma_fence_signal(f1);
- dma_fence_signal(f2);
dma_fence_put(chain);
- return 0;
+ return err;
}
static int unwrap_chain_array(void *arg)
@@ -242,10 +234,115 @@ static int unwrap_chain_array(void *arg)
err = -EINVAL;
}
- dma_fence_signal(f1);
- dma_fence_signal(f2);
dma_fence_put(chain);
- return 0;
+ return err;
+}
+
+static int unwrap_merge(void *arg)
+{
+ struct dma_fence *fence, *f1, *f2, *f3;
+ struct dma_fence_unwrap iter;
+ int err = 0;
+
+ f1 = mock_fence();
+ if (!f1)
+ return -ENOMEM;
+
+ f2 = mock_fence();
+ if (!f2) {
+ err = -ENOMEM;
+ goto error_put_f1;
+ }
+
+ f3 = dma_fence_unwrap_merge(f1, f2);
+ if (!f3) {
+ err = -ENOMEM;
+ goto error_put_f2;
+ }
+
+ dma_fence_unwrap_for_each(fence, &iter, f3) {
+ if (fence == f1) {
+ dma_fence_put(f1);
+ f1 = NULL;
+ } else if (fence == f2) {
+ dma_fence_put(f2);
+ f2 = NULL;
+ } else {
+ pr_err("Unexpected fence!\n");
+ err = -EINVAL;
+ }
+ }
+
+ if (f1 || f2) {
+ pr_err("Not all fences seen!\n");
+ err = -EINVAL;
+ }
+
+ dma_fence_put(f3);
+error_put_f2:
+ dma_fence_put(f2);
+error_put_f1:
+ dma_fence_put(f1);
+ return err;
+}
+
+static int unwrap_merge_complex(void *arg)
+{
+ struct dma_fence *fence, *f1, *f2, *f3, *f4, *f5;
+ struct dma_fence_unwrap iter;
+ int err = -ENOMEM;
+
+ f1 = mock_fence();
+ if (!f1)
+ return -ENOMEM;
+
+ f2 = mock_fence();
+ if (!f2)
+ goto error_put_f1;
+
+ f3 = dma_fence_unwrap_merge(f1, f2);
+ if (!f3)
+ goto error_put_f2;
+
+ /* The resulting array has the fences in reverse */
+ f4 = dma_fence_unwrap_merge(f2, f1);
+ if (!f4)
+ goto error_put_f3;
+
+ /* Signaled fences should be filtered, the two arrays merged. */
+ f5 = dma_fence_unwrap_merge(f3, f4, dma_fence_get_stub());
+ if (!f5)
+ goto error_put_f4;
+
+ err = 0;
+ dma_fence_unwrap_for_each(fence, &iter, f5) {
+ if (fence == f1) {
+ dma_fence_put(f1);
+ f1 = NULL;
+ } else if (fence == f2) {
+ dma_fence_put(f2);
+ f2 = NULL;
+ } else {
+ pr_err("Unexpected fence!\n");
+ err = -EINVAL;
+ }
+ }
+
+ if (f1 || f2) {
+ pr_err("Not all fences seen!\n");
+ err = -EINVAL;
+ }
+
+ dma_fence_put(f5);
+error_put_f4:
+ dma_fence_put(f4);
+error_put_f3:
+ dma_fence_put(f3);
+error_put_f2:
+ dma_fence_put(f2);
+error_put_f1:
+ dma_fence_put(f1);
+ return err;
}
int dma_fence_unwrap(void)
@@ -255,6 +352,8 @@ int dma_fence_unwrap(void)
SUBTEST(unwrap_array),
SUBTEST(unwrap_chain),
SUBTEST(unwrap_chain_array),
+ SUBTEST(unwrap_merge),
+ SUBTEST(unwrap_merge_complex),
};
return subtests(tests, NULL);
diff --git a/drivers/dma-buf/sync_file.c b/drivers/dma-buf/sync_file.c
index 0fe564539166..3ebec19a8e02 100644
--- a/drivers/dma-buf/sync_file.c
+++ b/drivers/dma-buf/sync_file.c
@@ -146,50 +146,6 @@ char *sync_file_get_name(struct sync_file *sync_file, char *buf, int len)
return buf;
}
-static int sync_file_set_fence(struct sync_file *sync_file,
- struct dma_fence **fences, int num_fences)
-{
- struct dma_fence_array *array;
-
- /*
- * The reference for the fences in the new sync_file and held
- * in add_fence() during the merge procedure, so for num_fences == 1
- * we already own a new reference to the fence. For num_fence > 1
- * we own the reference of the dma_fence_array creation.
- */
-
- if (num_fences == 0) {
- sync_file->fence = dma_fence_get_stub();
- kfree(fences);
-
- } else if (num_fences == 1) {
- sync_file->fence = fences[0];
- kfree(fences);
-
- } else {
- array = dma_fence_array_create(num_fences, fences,
- dma_fence_context_alloc(1),
- 1, false);
- if (!array)
- return -ENOMEM;
-
- sync_file->fence = &array->base;
- }
-
- return 0;
-}
-
-static void add_fence(struct dma_fence **fences,
- int *i, struct dma_fence *fence)
-{
- fences[*i] = fence;
-
- if (!dma_fence_is_signaled(fence)) {
- dma_fence_get(fence);
- (*i)++;
- }
-}
-
/**
* sync_file_merge() - merge two sync_files
* @name: name of new fence
@@ -203,84 +159,21 @@ static void add_fence(struct dma_fence **fences,
static struct sync_file *sync_file_merge(const char *name, struct sync_file *a,
struct sync_file *b)
{
- struct dma_fence *a_fence, *b_fence, **fences;
- struct dma_fence_unwrap a_iter, b_iter;
- unsigned int index, num_fences;
struct sync_file *sync_file;
+ struct dma_fence *fence;
sync_file = sync_file_alloc();
if (!sync_file)
return NULL;
- num_fences = 0;
- dma_fence_unwrap_for_each(a_fence, &a_iter, a->fence)
- ++num_fences;
- dma_fence_unwrap_for_each(b_fence, &b_iter, b->fence)
- ++num_fences;
-
- if (num_fences > INT_MAX)
- goto err_free_sync_file;
-
- fences = kcalloc(num_fences, sizeof(*fences), GFP_KERNEL);
- if (!fences)
- goto err_free_sync_file;
-
- /*
- * We can't guarantee that fences in both a and b are ordered, but it is
- * still quite likely.
- *
- * So attempt to order the fences as we pass over them and merge fences
- * with the same context.
- */
-
- index = 0;
- for (a_fence = dma_fence_unwrap_first(a->fence, &a_iter),
- b_fence = dma_fence_unwrap_first(b->fence, &b_iter);
- a_fence || b_fence; ) {
-
- if (!b_fence) {
- add_fence(fences, &index, a_fence);
- a_fence = dma_fence_unwrap_next(&a_iter);
-
- } else if (!a_fence) {
- add_fence(fences, &index, b_fence);
- b_fence = dma_fence_unwrap_next(&b_iter);
-
- } else if (a_fence->context < b_fence->context) {
- add_fence(fences, &index, a_fence);
- a_fence = dma_fence_unwrap_next(&a_iter);
-
- } else if (b_fence->context < a_fence->context) {
- add_fence(fences, &index, b_fence);
- b_fence = dma_fence_unwrap_next(&b_iter);
-
- } else if (__dma_fence_is_later(a_fence->seqno, b_fence->seqno,
- a_fence->ops)) {
- add_fence(fences, &index, a_fence);
- a_fence = dma_fence_unwrap_next(&a_iter);
- b_fence = dma_fence_unwrap_next(&b_iter);
-
- } else {
- add_fence(fences, &index, b_fence);
- a_fence = dma_fence_unwrap_next(&a_iter);
- b_fence = dma_fence_unwrap_next(&b_iter);
- }
+ fence = dma_fence_unwrap_merge(a->fence, b->fence);
+ if (!fence) {
+ fput(sync_file->file);
+ return NULL;
}
-
- if (sync_file_set_fence(sync_file, fences, index) < 0)
- goto err_put_fences;
-
+ sync_file->fence = fence;
strlcpy(sync_file->user_name, name, sizeof(sync_file->user_name));
return sync_file;
-
-err_put_fences:
- while (index)
- dma_fence_put(fences[--index]);
- kfree(fences);
-
-err_free_sync_file:
- fput(sync_file->file);
- return NULL;
}
static int sync_file_release(struct inode *inode, struct file *file)
diff --git a/drivers/dma-buf/udmabuf.c b/drivers/dma-buf/udmabuf.c
index 9631f2fd2faf..38e8767ec371 100644
--- a/drivers/dma-buf/udmabuf.c
+++ b/drivers/dma-buf/udmabuf.c
@@ -368,7 +368,23 @@ static struct miscdevice udmabuf_misc = {
static int __init udmabuf_dev_init(void)
{
- return misc_register(&udmabuf_misc);
+ int ret;
+
+ ret = misc_register(&udmabuf_misc);
+ if (ret < 0) {
+ pr_err("Could not initialize udmabuf device\n");
+ return ret;
+ }
+
+ ret = dma_coerce_mask_and_coherent(udmabuf_misc.this_device,
+ DMA_BIT_MASK(64));
+ if (ret < 0) {
+ pr_err("Could not setup DMA mask for udmabuf device\n");
+ misc_deregister(&udmabuf_misc);
+ return ret;
+ }
+
+ return 0;
}
static void __exit udmabuf_dev_exit(void)