drivers/accel/qaic/Makefile | 1
drivers/accel/qaic/mhi_qaic_ctrl.c | 569 -----------------------
drivers/accel/qaic/mhi_qaic_ctrl.h | 12
drivers/accel/qaic/qaic_drv.c | 10
drivers/gpu/drm/panel/panel-novatek-nt35950.c | 10
drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 2
drivers/gpu/drm/ttm/ttm_pool.c | 30 -
7 files changed, 21 insertions(+), 613 deletions(-)
New commits:
commit efa0ff28cf703b6415c6d4214c3c93074e501189
Merge: 05d524ffba98 cf03e2956af3
Author: Kevin Brace <kevinbr...@bracecomputerlab.com>
Date: Thu Apr 27 11:21:56 2023 -0700
Merge tag 'drm-next-2023-04-27' of git://anongit.freedesktop.org/drm/drm
into drm-next-6.4
drm-next fixes for 6.4-rc1
ttm:
- Fix TTM build on archs where PMD_SHIFT is not constant.
qaic:
- Revert uAPI from accel/qaic.
panel:
- Improve error handling in nt35950.
- Fix double unregister in otm8009a when removing the driver.
commit cf03e2956af307dc25e8c41fd4cffe44482a6ec1
Merge: 289af45508ca a50be876f4fe
Author: Dave Airlie <airl...@redhat.com>
Date: Thu Apr 27 11:29:33 2023 +1000
Merge tag 'drm-misc-next-fixes-2023-04-26' of
git://anongit.freedesktop.org/drm/drm-misc into drm-next
drm-misc-next-fixes for v6.4-rc1:
- Revert uAPI from accel/qaic.
- Fix TTM build on archs where PMD_SHIFT is not constant.
- Improve error handling in nt35950.
- Fix double unregister in otm8009a when removing the driver.
Signed-off-by: Dave Airlie <airl...@redhat.com>
From: Maarten Lankhorst <maarten.lankho...@linux.intel.com>
Link:
https://patchwork.freedesktop.org/patch/msgid/45757de9-75d8-5b41-f1f9-562a7c467...@linux.intel.com
commit a50be876f4fe2349dc8b056a49d87f69c944570f
Author: Konrad Dybcio <konrad.dyb...@linaro.org>
Date: Mon Apr 17 17:41:08 2023 +0200
drm/panel: novatek-nt35950: Only unregister DSI1 if it exists
Commit 5dd45b66742a ("drm/panel: novatek-nt35950: Improve error handling")
introduced logic to unregister DSI1 on any sort of probe failure, as
that's not done automatically by kernel APIs.
It did not however account for cases where only one DSI host is used.
Fix that.
Fixes: 5dd45b66742a ("drm/panel: novatek-nt35950: Improve error handling")
Reported-by: AngeloGioacchino Del Regno
<angelogioacchino.delre...@collabora.com>
Signed-off-by: Konrad Dybcio <konrad.dyb...@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno
<angelogioacchino.delre...@collabora.com>
Signed-off-by: Neil Armstrong <neil.armstr...@linaro.org>
Link:
https://patchwork.freedesktop.org/patch/msgid/20230417-topic-maple_panel_fixup-v1-1-07c8db606...@linaro.org
diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35950.c
b/drivers/gpu/drm/panel/panel-novatek-nt35950.c
index 7498fc6258bb..8b108ac80b55 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt35950.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt35950.c
@@ -586,7 +586,8 @@ static int nt35950_probe(struct mipi_dsi_device *dsi)
ret = drm_panel_of_backlight(&nt->panel);
if (ret) {
- mipi_dsi_device_unregister(nt->dsi[1]);
+ if (num_dsis == 2)
+ mipi_dsi_device_unregister(nt->dsi[1]);
return dev_err_probe(dev, ret, "Failed to get backlight\n");
}
@@ -606,7 +607,8 @@ static int nt35950_probe(struct mipi_dsi_device *dsi)
ret = mipi_dsi_attach(nt->dsi[i]);
if (ret < 0) {
/* If we fail to attach to either host, we're done */
- mipi_dsi_device_unregister(nt->dsi[1]);
+ if (num_dsis == 2)
+ mipi_dsi_device_unregister(nt->dsi[1]);
return dev_err_probe(dev, ret,
"Cannot attach to DSI%d host.\n",
i);
commit ab4f869fba6119997f7630d600049762a2b014fa
Author: James Cowgill <james.cowg...@blaize.com>
Date: Wed Apr 12 17:35:07 2023 +0000
drm/panel: otm8009a: Set backlight parent to panel device
This is the logical place to put the backlight device, and it also
fixes a kernel crash if the MIPI host is removed. Previously the
backlight device would be unregistered twice when this happened - once
as a child of the MIPI host through `mipi_dsi_host_unregister`, and
once when the panel device is destroyed.
Fixes: 12a6cbd4f3f1 ("drm/panel: otm8009a: Use new backlight API")
Signed-off-by: James Cowgill <james.cowg...@blaize.com>
Cc: sta...@vger.kernel.org
Reviewed-by: Neil Armstrong <neil.armstr...@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstr...@linaro.org>
Link:
https://patchwork.freedesktop.org/patch/msgid/20230412173450.199592-1-james.cowg...@blaize.com
diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
index b4729a94c34a..898b892f1143 100644
--- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
+++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c
@@ -471,7 +471,7 @@ static int otm8009a_probe(struct mipi_dsi_device *dsi)
DRM_MODE_CONNECTOR_DSI);
ctx->bl_dev = devm_backlight_device_register(dev, dev_name(dev),
- dsi->host->dev, ctx,
+ dev, ctx,
&otm8009a_backlight_ops,
NULL);
if (IS_ERR(ctx->bl_dev)) {
commit 5dd45b66742a1f3cfa9a92dc0ac8714c7708ee6c
Author: Konrad Dybcio <konrad.dyb...@linaro.org>
Date: Sat Apr 15 13:00:30 2023 +0200
drm/panel: novatek-nt35950: Improve error handling
In a very peculiar case when probing and registering with the secondary
DSI host succeeds, but the OF backlight or DSI attachment fails, the
primary DSI device is automatically cleaned up, but the secondary one
is not, leading to -EEXIST when the driver core tries to handle
-EPROBE_DEFER.
Unregister the DSI1 device manually on failure to prevent that.
Fixes: 623a3531e9cf ("drm/panel: Add driver for Novatek NT35950 DSI
DriverIC panels")
Signed-off-by: Konrad Dybcio <konrad.dyb...@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstr...@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstr...@linaro.org>
Link:
https://patchwork.freedesktop.org/patch/msgid/20230415-konrad-longbois-next-v1-1-ce695dc9d...@linaro.org
diff --git a/drivers/gpu/drm/panel/panel-novatek-nt35950.c
b/drivers/gpu/drm/panel/panel-novatek-nt35950.c
index abf752b36a52..7498fc6258bb 100644
--- a/drivers/gpu/drm/panel/panel-novatek-nt35950.c
+++ b/drivers/gpu/drm/panel/panel-novatek-nt35950.c
@@ -585,8 +585,11 @@ static int nt35950_probe(struct mipi_dsi_device *dsi)
DRM_MODE_CONNECTOR_DSI);
ret = drm_panel_of_backlight(&nt->panel);
- if (ret)
+ if (ret) {
+ mipi_dsi_device_unregister(nt->dsi[1]);
+
return dev_err_probe(dev, ret, "Failed to get backlight\n");
+ }
drm_panel_add(&nt->panel);
@@ -602,6 +605,9 @@ static int nt35950_probe(struct mipi_dsi_device *dsi)
ret = mipi_dsi_attach(nt->dsi[i]);
if (ret < 0) {
+ /* If we fail to attach to either host, we're done */
+ mipi_dsi_device_unregister(nt->dsi[1]);
+
return dev_err_probe(dev, ret,
"Cannot attach to DSI%d host.\n",
i);
}
commit 56e51681246e574dcb2e13fc071c2945c7667c83
Author: Christian König <christian.koe...@amd.com>
Date: Thu Apr 13 17:02:01 2023 +0200
drm/ttm: revert "Reduce the number of used allocation orders for TTM pages"
This reverts commit 322458c2bb1a0398c5775333e1e71e1ece8a461f.
PMD_SHIFT is not necessary constant on all architectures resulting in
build failures.
Signed-off-by: Christian König <christian.koe...@amd.com>
Acked-by: Daniel Vetter <daniel.vet...@ffwll.ch>
Link:
https://patchwork.freedesktop.org/patch/msgid/cakmk7uhguuqwjuqmzkrxi2mniqexhmmif-naynzusj-puw-...@mail.gmail.com
diff --git a/drivers/gpu/drm/ttm/ttm_pool.c b/drivers/gpu/drm/ttm/ttm_pool.c
index 18c342a919a2..dfce896c4bae 100644
--- a/drivers/gpu/drm/ttm/ttm_pool.c
+++ b/drivers/gpu/drm/ttm/ttm_pool.c
@@ -47,11 +47,6 @@
#include "ttm_module.h"
-#define TTM_MAX_ORDER (PMD_SHIFT - PAGE_SHIFT)
-#define __TTM_DIM_ORDER (TTM_MAX_ORDER + 1)
-/* Some architectures have a weird PMD_SHIFT */
-#define TTM_DIM_ORDER (__TTM_DIM_ORDER <= MAX_ORDER ? __TTM_DIM_ORDER :
MAX_ORDER)
-
/**
* struct ttm_pool_dma - Helper object for coherent DMA mappings
*
@@ -70,11 +65,11 @@ module_param(page_pool_size, ulong, 0644);
static atomic_long_t allocated_pages;
-static struct ttm_pool_type global_write_combined[TTM_DIM_ORDER];
-static struct ttm_pool_type global_uncached[TTM_DIM_ORDER];
+static struct ttm_pool_type global_write_combined[MAX_ORDER];
+static struct ttm_pool_type global_uncached[MAX_ORDER];
-static struct ttm_pool_type global_dma32_write_combined[TTM_DIM_ORDER];
-static struct ttm_pool_type global_dma32_uncached[TTM_DIM_ORDER];
+static struct ttm_pool_type global_dma32_write_combined[MAX_ORDER];
+static struct ttm_pool_type global_dma32_uncached[MAX_ORDER];
static spinlock_t shrinker_lock;
static struct list_head shrinker_list;
@@ -449,7 +444,7 @@ int ttm_pool_alloc(struct ttm_pool *pool, struct ttm_tt *tt,
else
gfp_flags |= GFP_HIGHUSER;
- for (order = min_t(unsigned int, TTM_MAX_ORDER, __fls(num_pages));
+ for (order = min_t(unsigned int, MAX_ORDER - 1, __fls(num_pages));
num_pages;
order = min_t(unsigned int, order, __fls(num_pages))) {
struct ttm_pool_type *pt;
@@ -568,7 +563,7 @@ void ttm_pool_init(struct ttm_pool *pool, struct device
*dev,
if (use_dma_alloc) {
for (i = 0; i < TTM_NUM_CACHING_TYPES; ++i)
- for (j = 0; j < TTM_DIM_ORDER; ++j)
+ for (j = 0; j < MAX_ORDER; ++j)
ttm_pool_type_init(&pool->caching[i].orders[j],
pool, i, j);
}
@@ -588,7 +583,7 @@ void ttm_pool_fini(struct ttm_pool *pool)
if (pool->use_dma_alloc) {
for (i = 0; i < TTM_NUM_CACHING_TYPES; ++i)
- for (j = 0; j < TTM_DIM_ORDER; ++j)
+ for (j = 0; j < MAX_ORDER; ++j)
ttm_pool_type_fini(&pool->caching[i].orders[j]);
}
@@ -642,7 +637,7 @@ static void ttm_pool_debugfs_header(struct seq_file *m)
unsigned int i;
seq_puts(m, "\t ");
- for (i = 0; i < TTM_DIM_ORDER; ++i)
+ for (i = 0; i < MAX_ORDER; ++i)
seq_printf(m, " ---%2u---", i);
seq_puts(m, "\n");
}
@@ -653,7 +648,7 @@ static void ttm_pool_debugfs_orders(struct ttm_pool_type
*pt,
{
unsigned int i;
- for (i = 0; i < TTM_DIM_ORDER; ++i)
+ for (i = 0; i < MAX_ORDER; ++i)
seq_printf(m, " %8u", ttm_pool_type_count(&pt[i]));
seq_puts(m, "\n");
}
@@ -756,16 +751,13 @@ int ttm_pool_mgr_init(unsigned long num_pages)
{
unsigned int i;
- BUILD_BUG_ON(TTM_DIM_ORDER > MAX_ORDER);
- BUILD_BUG_ON(TTM_DIM_ORDER < 1);
-
if (!page_pool_size)
page_pool_size = num_pages;
spin_lock_init(&shrinker_lock);
INIT_LIST_HEAD(&shrinker_list);
- for (i = 0; i < TTM_DIM_ORDER; ++i) {
+ for (i = 0; i < MAX_ORDER; ++i) {
ttm_pool_type_init(&global_write_combined[i], NULL,
ttm_write_combined, i);
ttm_pool_type_init(&global_uncached[i], NULL, ttm_uncached, i);
@@ -798,7 +790,7 @@ void ttm_pool_mgr_fini(void)
{
unsigned int i;
- for (i = 0; i < TTM_DIM_ORDER; ++i) {
+ for (i = 0; i < MAX_ORDER; ++i) {
ttm_pool_type_fini(&global_write_combined[i]);
ttm_pool_type_fini(&global_uncached[i]);
commit 50e9cc9a4a1798371bafabcc1ba7dfd882c71b2f
Author: Jeffrey Hugo <quic_jh...@quicinc.com>
Date: Wed Apr 12 07:57:44 2023 -0600
Revert "accel/qaic: Add mhi_qaic_cntl"
This reverts commit 566fc96198b4bb07ca6806386956669881225271.
This exposes a userspace API that is still under debate. Revert the
change before the uAPI gets exposed to avoid making a mistake. QAIC is
otherwise still functional.
Suggested-by: Daniel Vetter <dan...@ffwll.ch>
Signed-off-by: Jeffrey Hugo <quic_jh...@quicinc.com>
Reviewed-by: Pranjal Ramajor Asha Kanojiya <quic_pkano...@quicinc.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.grus...@linux.intel.com>
Acked-by: Daniel Vetter <daniel.vet...@ffwll.ch>
Acked-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynow...@linux.intel.com>
Link:
https://patchwork.freedesktop.org/patch/msgid/1681307864-3782-1-git-send-email-quic_jh...@quicinc.com
diff --git a/drivers/accel/qaic/Makefile b/drivers/accel/qaic/Makefile
index d5f4952ae79a..2418418f7a50 100644
--- a/drivers/accel/qaic/Makefile
+++ b/drivers/accel/qaic/Makefile
@@ -7,7 +7,6 @@ obj-$(CONFIG_DRM_ACCEL_QAIC) := qaic.o
qaic-y := \
mhi_controller.o \
- mhi_qaic_ctrl.o \
qaic_control.o \
qaic_data.o \
qaic_drv.o
diff --git a/drivers/accel/qaic/mhi_qaic_ctrl.c
b/drivers/accel/qaic/mhi_qaic_ctrl.c
deleted file mode 100644
index 0c7e571f1f12..000000000000
--- a/drivers/accel/qaic/mhi_qaic_ctrl.c
+++ /dev/null
@@ -1,569 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-only
-/* Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights
reserved. */
-
-#include <linux/kernel.h>
-#include <linux/mhi.h>
-#include <linux/mod_devicetable.h>
-#include <linux/module.h>
-#include <linux/poll.h>
-#include <linux/xarray.h>
-#include <uapi/linux/eventpoll.h>
-
-#include "mhi_qaic_ctrl.h"
-#include "qaic.h"
-
-#define MHI_QAIC_CTRL_DRIVER_NAME "mhi_qaic_ctrl"
-#define MHI_QAIC_CTRL_MAX_MINORS 128
-#define MHI_MAX_MTU 0xffff
-static DEFINE_XARRAY_ALLOC(mqc_xa);
-static struct class *mqc_dev_class;
-static int mqc_dev_major;
-
-/**
- * struct mqc_buf - Buffer structure used to receive data from device
- * @data: Address of data to read from
- * @odata: Original address returned from *alloc() API. Used to free this buf.
- * @len: Length of data in byte
- * @node: This buffer will be part of list managed in struct mqc_dev
- */
-struct mqc_buf {
- void *data;
- void *odata;
- size_t len;
- struct list_head node;
-};
-
-/**
- * struct mqc_dev - MHI QAIC Control Device
- * @minor: MQC device node minor number
- * @mhi_dev: Associated mhi device object
- * @mtu: Max TRE buffer length
- * @enabled: Flag to track the state of the MQC device
- * @lock: Mutex lock to serialize access to open_count
- * @read_lock: Mutex lock to serialize readers
- * @write_lock: Mutex lock to serialize writers
- * @ul_wq: Wait queue for writers
- * @dl_wq: Wait queue for readers
- * @dl_queue_lock: Spin lock to serialize access to download queue
- * @dl_queue: Queue of downloaded buffers
- * @open_count: Track open counts
- * @ref_count: Reference count for this structure
- */
-struct mqc_dev {
- u32 minor;
- struct mhi_device *mhi_dev;
- size_t mtu;
- bool enabled;
- struct mutex lock;
- struct mutex read_lock;
- struct mutex write_lock;
- wait_queue_head_t ul_wq;
- wait_queue_head_t dl_wq;
- spinlock_t dl_queue_lock;
- struct list_head dl_queue;
- unsigned int open_count;
- struct kref ref_count;
-};
-
-static void mqc_dev_release(struct kref *ref)
-{
- struct mqc_dev *mqcdev = container_of(ref, struct mqc_dev, ref_count);
-
- mutex_destroy(&mqcdev->read_lock);
- mutex_destroy(&mqcdev->write_lock);
- mutex_destroy(&mqcdev->lock);
- kfree(mqcdev);
-}
-
-static int mhi_qaic_ctrl_fill_dl_queue(struct mqc_dev *mqcdev)
-{
- struct mhi_device *mhi_dev = mqcdev->mhi_dev;
- struct mqc_buf *ctrlbuf;
- int rx_budget;
- int ret = 0;
- void *data;
-
- rx_budget = mhi_get_free_desc_count(mhi_dev, DMA_FROM_DEVICE);
- if (rx_budget < 0)
- return -EIO;
-
- while (rx_budget--) {
- data = kzalloc(mqcdev->mtu + sizeof(*ctrlbuf), GFP_KERNEL);
- if (!data)
- return -ENOMEM;
-
- ctrlbuf = data + mqcdev->mtu;
- ctrlbuf->odata = data;
-
- ret = mhi_queue_buf(mhi_dev, DMA_FROM_DEVICE, data,
mqcdev->mtu, MHI_EOT);
- if (ret) {
- kfree(data);
- dev_err(&mhi_dev->dev, "Failed to queue buffer\n");
- return ret;
- }
- }
-
- return ret;
-}
-
-static int mhi_qaic_ctrl_dev_start_chan(struct mqc_dev *mqcdev)
-{
- struct device *dev = &mqcdev->mhi_dev->dev;
- int ret = 0;
-
- ret = mutex_lock_interruptible(&mqcdev->lock);
- if (ret)
- return ret;
- if (!mqcdev->enabled) {
- ret = -ENODEV;
- goto release_dev_lock;
- }
- if (!mqcdev->open_count) {
- ret = mhi_prepare_for_transfer(mqcdev->mhi_dev);
- if (ret) {
- dev_err(dev, "Error starting transfer channels\n");
- goto release_dev_lock;
- }
-
- ret = mhi_qaic_ctrl_fill_dl_queue(mqcdev);
- if (ret) {
- dev_err(dev, "Error filling download queue.\n");
- goto mhi_unprepare;
- }
- }
- mqcdev->open_count++;
- mutex_unlock(&mqcdev->lock);
-
- return 0;
-
-mhi_unprepare:
- mhi_unprepare_from_transfer(mqcdev->mhi_dev);
-release_dev_lock:
- mutex_unlock(&mqcdev->lock);
- return ret;
-}
-
-static struct mqc_dev *mqc_dev_get_by_minor(unsigned int minor)
-{
- struct mqc_dev *mqcdev;
-
- xa_lock(&mqc_xa);
- mqcdev = xa_load(&mqc_xa, minor);
- if (mqcdev)
- kref_get(&mqcdev->ref_count);
- xa_unlock(&mqc_xa);
-
- return mqcdev;
-}
-
-static int mhi_qaic_ctrl_open(struct inode *inode, struct file *filp)
-{
- struct mqc_dev *mqcdev;
- int ret;
-
- mqcdev = mqc_dev_get_by_minor(iminor(inode));
- if (!mqcdev) {
- pr_debug("mqc: minor %d not found\n", iminor(inode));
- return -EINVAL;
- }
-
- ret = mhi_qaic_ctrl_dev_start_chan(mqcdev);
- if (ret) {
- kref_put(&mqcdev->ref_count, mqc_dev_release);
- return ret;
- }
-
- filp->private_data = mqcdev;
-
- return 0;
-}
-
-static void mhi_qaic_ctrl_buf_free(struct mqc_buf *ctrlbuf)
-{
- list_del(&ctrlbuf->node);
- kfree(ctrlbuf->odata);
-}
-
-static void __mhi_qaic_ctrl_release(struct mqc_dev *mqcdev)
-{
- struct mqc_buf *ctrlbuf, *tmp;
-
- mhi_unprepare_from_transfer(mqcdev->mhi_dev);
- wake_up_interruptible(&mqcdev->ul_wq);
- wake_up_interruptible(&mqcdev->dl_wq);
- /*
- * Free the dl_queue. As we have already unprepared mhi transfers, we
- * do not expect any callback functions that update dl_queue hence no
need
- * to grab dl_queue lock.
- */
- mutex_lock(&mqcdev->read_lock);
- list_for_each_entry_safe(ctrlbuf, tmp, &mqcdev->dl_queue, node)
- mhi_qaic_ctrl_buf_free(ctrlbuf);
- mutex_unlock(&mqcdev->read_lock);
-}
-
-static int mhi_qaic_ctrl_release(struct inode *inode, struct file *file)
-{
- struct mqc_dev *mqcdev = file->private_data;
-
- mutex_lock(&mqcdev->lock);
- mqcdev->open_count--;
- if (!mqcdev->open_count && mqcdev->enabled)
- __mhi_qaic_ctrl_release(mqcdev);
- mutex_unlock(&mqcdev->lock);
-
- kref_put(&mqcdev->ref_count, mqc_dev_release);
-
- return 0;
-}
-
-static __poll_t mhi_qaic_ctrl_poll(struct file *file, poll_table *wait)
-{
- struct mqc_dev *mqcdev = file->private_data;
- struct mhi_device *mhi_dev;
- __poll_t mask = 0;
-
- mhi_dev = mqcdev->mhi_dev;
-
- poll_wait(file, &mqcdev->ul_wq, wait);
- poll_wait(file, &mqcdev->dl_wq, wait);
-
- mutex_lock(&mqcdev->lock);
- if (!mqcdev->enabled) {
- mutex_unlock(&mqcdev->lock);
- return EPOLLERR;
- }
-
- spin_lock_bh(&mqcdev->dl_queue_lock);
- if (!list_empty(&mqcdev->dl_queue))
- mask |= EPOLLIN | EPOLLRDNORM;
- spin_unlock_bh(&mqcdev->dl_queue_lock);
-
- if (mutex_lock_interruptible(&mqcdev->write_lock)) {
- mutex_unlock(&mqcdev->lock);
- return EPOLLERR;
- }
- if (mhi_get_free_desc_count(mhi_dev, DMA_TO_DEVICE) > 0)
- mask |= EPOLLOUT | EPOLLWRNORM;
- mutex_unlock(&mqcdev->write_lock);
- mutex_unlock(&mqcdev->lock);
-
- dev_dbg(&mhi_dev->dev, "Client attempted to poll, returning mask
0x%x\n", mask);
-
- return mask;
-}
-
-static int mhi_qaic_ctrl_tx(struct mqc_dev *mqcdev)
-{
- int ret;
-
- ret = wait_event_interruptible(mqcdev->ul_wq, !mqcdev->enabled ||
- mhi_get_free_desc_count(mqcdev->mhi_dev,
DMA_TO_DEVICE) > 0);
-
- if (!mqcdev->enabled)
- return -ENODEV;
-
- return ret;
-}
-
-static ssize_t mhi_qaic_ctrl_write(struct file *file, const char __user *buf,
size_t count,
- loff_t *offp)
-{
- struct mqc_dev *mqcdev = file->private_data;
- struct mhi_device *mhi_dev;
- size_t bytes_xfered = 0;
- struct device *dev;
- int ret, nr_desc;
-
- mhi_dev = mqcdev->mhi_dev;
- dev = &mhi_dev->dev;
-
- if (!mhi_dev->ul_chan)
- return -EOPNOTSUPP;
-
- if (!buf || !count)
- return -EINVAL;
-
- dev_dbg(dev, "Request to transfer %zu bytes\n", count);
-
- ret = mhi_qaic_ctrl_tx(mqcdev);
- if (ret)
- return ret;
-
- if (mutex_lock_interruptible(&mqcdev->write_lock))
- return -EINTR;
-
- nr_desc = mhi_get_free_desc_count(mhi_dev, DMA_TO_DEVICE);
- if (nr_desc * mqcdev->mtu < count) {
- ret = -EMSGSIZE;
- dev_dbg(dev, "Buffer too big to transfer\n");
- goto unlock_mutex;
- }
-
- while (count != bytes_xfered) {
- enum mhi_flags flags;
- size_t to_copy;
- void *kbuf;
-
- to_copy = min_t(size_t, count - bytes_xfered, mqcdev->mtu);
- kbuf = kmalloc(to_copy, GFP_KERNEL);
- if (!kbuf) {
- ret = -ENOMEM;
- goto unlock_mutex;
- }
-
- ret = copy_from_user(kbuf, buf + bytes_xfered, to_copy);
- if (ret) {
- kfree(kbuf);
- ret = -EFAULT;
- goto unlock_mutex;
- }
-
- if (bytes_xfered + to_copy == count)
- flags = MHI_EOT;
- else
- flags = MHI_CHAIN;
-
- ret = mhi_queue_buf(mhi_dev, DMA_TO_DEVICE, kbuf, to_copy,
flags);
- if (ret) {
- kfree(kbuf);
- dev_err(dev, "Failed to queue buf of size %zu\n",
to_copy);
- goto unlock_mutex;
- }
-
- bytes_xfered += to_copy;
- }
-
- mutex_unlock(&mqcdev->write_lock);
- dev_dbg(dev, "bytes xferred: %zu\n", bytes_xfered);
-
- return bytes_xfered;
-
-unlock_mutex:
- mutex_unlock(&mqcdev->write_lock);
- return ret;
-}
-
-static int mhi_qaic_ctrl_rx(struct mqc_dev *mqcdev)
-{
- int ret;
-
- ret = wait_event_interruptible(mqcdev->dl_wq,
- !mqcdev->enabled ||
!list_empty(&mqcdev->dl_queue));
-
- if (!mqcdev->enabled)
- return -ENODEV;
-
- return ret;
-}
-
-static ssize_t mhi_qaic_ctrl_read(struct file *file, char __user *buf, size_t
count, loff_t *ppos)
-{
- struct mqc_dev *mqcdev = file->private_data;
- struct mqc_buf *ctrlbuf;
- size_t to_copy;
- int ret;
-
- if (!mqcdev->mhi_dev->dl_chan)
- return -EOPNOTSUPP;
-
- ret = mhi_qaic_ctrl_rx(mqcdev);
- if (ret)
- return ret;
-
- if (mutex_lock_interruptible(&mqcdev->read_lock))
- return -EINTR;
-
- ctrlbuf = list_first_entry_or_null(&mqcdev->dl_queue, struct mqc_buf,
node);
- if (!ctrlbuf) {
- mutex_unlock(&mqcdev->read_lock);
- ret = -ENODEV;
- goto error_out;
- }
-
- to_copy = min_t(size_t, count, ctrlbuf->len);
- if (copy_to_user(buf, ctrlbuf->data, to_copy)) {
- mutex_unlock(&mqcdev->read_lock);
- dev_dbg(&mqcdev->mhi_dev->dev, "Failed to copy data to user
buffer\n");
- ret = -EFAULT;
- goto error_out;
- }
-
- ctrlbuf->len -= to_copy;
- ctrlbuf->data += to_copy;
-
- if (!ctrlbuf->len) {
- spin_lock_bh(&mqcdev->dl_queue_lock);
- mhi_qaic_ctrl_buf_free(ctrlbuf);
- spin_unlock_bh(&mqcdev->dl_queue_lock);
- mhi_qaic_ctrl_fill_dl_queue(mqcdev);
- dev_dbg(&mqcdev->mhi_dev->dev, "Read buf freed\n");
- }
-
- mutex_unlock(&mqcdev->read_lock);
- return to_copy;
-
-error_out:
- mutex_unlock(&mqcdev->read_lock);
- return ret;
-}
-
-static const struct file_operations mhidev_fops = {
- .owner = THIS_MODULE,
- .open = mhi_qaic_ctrl_open,
- .release = mhi_qaic_ctrl_release,
- .read = mhi_qaic_ctrl_read,
- .write = mhi_qaic_ctrl_write,
- .poll = mhi_qaic_ctrl_poll,
-};
-
-static void mhi_qaic_ctrl_ul_xfer_cb(struct mhi_device *mhi_dev, struct
mhi_result *mhi_result)
-{
- struct mqc_dev *mqcdev = dev_get_drvdata(&mhi_dev->dev);
-
- dev_dbg(&mhi_dev->dev, "%s: status: %d xfer_len: %zu\n", __func__,
- mhi_result->transaction_status, mhi_result->bytes_xferd);
-
- kfree(mhi_result->buf_addr);
-
- if (!mhi_result->transaction_status)
- wake_up_interruptible(&mqcdev->ul_wq);
-}
-
-static void mhi_qaic_ctrl_dl_xfer_cb(struct mhi_device *mhi_dev, struct
mhi_result *mhi_result)
-{
- struct mqc_dev *mqcdev = dev_get_drvdata(&mhi_dev->dev);
- struct mqc_buf *ctrlbuf;
-
- dev_dbg(&mhi_dev->dev, "%s: status: %d receive_len: %zu\n", __func__,
- mhi_result->transaction_status, mhi_result->bytes_xferd);
-
- if (mhi_result->transaction_status &&
- mhi_result->transaction_status != -EOVERFLOW) {
- kfree(mhi_result->buf_addr);
- return;
- }
-
- ctrlbuf = mhi_result->buf_addr + mqcdev->mtu;
- ctrlbuf->data = mhi_result->buf_addr;
- ctrlbuf->len = mhi_result->bytes_xferd;
- spin_lock_bh(&mqcdev->dl_queue_lock);
- list_add_tail(&ctrlbuf->node, &mqcdev->dl_queue);
- spin_unlock_bh(&mqcdev->dl_queue_lock);
-
- wake_up_interruptible(&mqcdev->dl_wq);
-}
-
-static int mhi_qaic_ctrl_probe(struct mhi_device *mhi_dev, const struct
mhi_device_id *id)
-{
- struct mqc_dev *mqcdev;
- struct device *dev;
- int ret;
-
- mqcdev = kzalloc(sizeof(*mqcdev), GFP_KERNEL);
- if (!mqcdev)
- return -ENOMEM;
-
- kref_init(&mqcdev->ref_count);
- mutex_init(&mqcdev->lock);
- mqcdev->mhi_dev = mhi_dev;
-
- ret = xa_alloc(&mqc_xa, &mqcdev->minor, mqcdev, XA_LIMIT(0,
MHI_QAIC_CTRL_MAX_MINORS),
- GFP_KERNEL);
- if (ret) {
- kfree(mqcdev);
- return ret;
- }
-
- init_waitqueue_head(&mqcdev->ul_wq);
- init_waitqueue_head(&mqcdev->dl_wq);
- mutex_init(&mqcdev->read_lock);
- mutex_init(&mqcdev->write_lock);
- spin_lock_init(&mqcdev->dl_queue_lock);
- INIT_LIST_HEAD(&mqcdev->dl_queue);
- mqcdev->mtu = min_t(size_t, id->driver_data, MHI_MAX_MTU);
- mqcdev->enabled = true;
- mqcdev->open_count = 0;
- dev_set_drvdata(&mhi_dev->dev, mqcdev);
-
- dev = device_create(mqc_dev_class, &mhi_dev->dev, MKDEV(mqc_dev_major,
mqcdev->minor),
- mqcdev, "%s", dev_name(&mhi_dev->dev));
- if (IS_ERR(dev)) {
- xa_erase(&mqc_xa, mqcdev->minor);
- dev_set_drvdata(&mhi_dev->dev, NULL);
- kfree(mqcdev);
- return PTR_ERR(dev);
- }
-
- return 0;
-};
-
-static void mhi_qaic_ctrl_remove(struct mhi_device *mhi_dev)
-{
- struct mqc_dev *mqcdev = dev_get_drvdata(&mhi_dev->dev);
-
- device_destroy(mqc_dev_class, MKDEV(mqc_dev_major, mqcdev->minor));
-
- mutex_lock(&mqcdev->lock);
- mqcdev->enabled = false;
- if (mqcdev->open_count)
- __mhi_qaic_ctrl_release(mqcdev);
- mutex_unlock(&mqcdev->lock);
-
- xa_erase(&mqc_xa, mqcdev->minor);
- kref_put(&mqcdev->ref_count, mqc_dev_release);
-}
-
-/* .driver_data stores max mtu */
-static const struct mhi_device_id mhi_qaic_ctrl_match_table[] = {
- { .chan = "QAIC_SAHARA", .driver_data = SZ_32K},
- {},
-};
-MODULE_DEVICE_TABLE(mhi, mhi_qaic_ctrl_match_table);
-
-static struct mhi_driver mhi_qaic_ctrl_driver = {
- .id_table = mhi_qaic_ctrl_match_table,
- .remove = mhi_qaic_ctrl_remove,
- .probe = mhi_qaic_ctrl_probe,
- .ul_xfer_cb = mhi_qaic_ctrl_ul_xfer_cb,
- .dl_xfer_cb = mhi_qaic_ctrl_dl_xfer_cb,
- .driver = {
- .name = MHI_QAIC_CTRL_DRIVER_NAME,
- },
-};
-
-int mhi_qaic_ctrl_init(void)
-{
- int ret;
-
- ret = register_chrdev(0, MHI_QAIC_CTRL_DRIVER_NAME, &mhidev_fops);
- if (ret < 0)
- return ret;
-
- mqc_dev_major = ret;
- mqc_dev_class = class_create(THIS_MODULE, MHI_QAIC_CTRL_DRIVER_NAME);
- if (IS_ERR(mqc_dev_class)) {
- ret = PTR_ERR(mqc_dev_class);
- goto unregister_chrdev;
- }
-
- ret = mhi_driver_register(&mhi_qaic_ctrl_driver);
- if (ret)
- goto destroy_class;
-
- return 0;
-
-destroy_class:
- class_destroy(mqc_dev_class);
-unregister_chrdev:
- unregister_chrdev(mqc_dev_major, MHI_QAIC_CTRL_DRIVER_NAME);
- return ret;
-}
-
-void mhi_qaic_ctrl_deinit(void)
-{
- mhi_driver_unregister(&mhi_qaic_ctrl_driver);
- class_destroy(mqc_dev_class);
- unregister_chrdev(mqc_dev_major, MHI_QAIC_CTRL_DRIVER_NAME);
- xa_destroy(&mqc_xa);
-}
diff --git a/drivers/accel/qaic/mhi_qaic_ctrl.h
b/drivers/accel/qaic/mhi_qaic_ctrl.h
deleted file mode 100644
index 930b3ace1a59..000000000000
--- a/drivers/accel/qaic/mhi_qaic_ctrl.h
+++ /dev/null
@@ -1,12 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only
- *
- * Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
- */
-
-#ifndef __MHI_QAIC_CTRL_H__
-#define __MHI_QAIC_CTRL_H__
-
-int mhi_qaic_ctrl_init(void);
-void mhi_qaic_ctrl_deinit(void);
-
-#endif /* __MHI_QAIC_CTRL_H__ */
diff --git a/drivers/accel/qaic/qaic_drv.c b/drivers/accel/qaic/qaic_drv.c
index 1106ad88a5b6..ff80eb571729 100644
--- a/drivers/accel/qaic/qaic_drv.c
+++ b/drivers/accel/qaic/qaic_drv.c
@@ -25,7 +25,6 @@
#include <uapi/drm/qaic_accel.h>
#include "mhi_controller.h"
-#include "mhi_qaic_ctrl.h"
#include "qaic.h"
MODULE_IMPORT_NS(DMA_BUF);
@@ -601,16 +600,8 @@ static int __init qaic_init(void)
goto free_mhi;
}
- ret = mhi_qaic_ctrl_init();
- if (ret) {
- pr_debug("qaic: mhi_qaic_ctrl_init failed %d\n", ret);
- goto free_pci;
- }
-
return 0;
-free_pci:
- pci_unregister_driver(&qaic_pci_driver);
free_mhi:
mhi_driver_unregister(&qaic_mhi_driver);
return ret;
@@ -634,7 +625,6 @@ static void __exit qaic_exit(void)
* reinitializing the link_up state after the cleanup is done.
*/
link_up = true;
- mhi_qaic_ctrl_deinit();
pci_unregister_driver(&qaic_pci_driver);
mhi_driver_unregister(&qaic_mhi_driver);
}
