From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> To: Bjorn Andersson <bjorn.andersson@linaro.org>, Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>, Abhinav Kumar <abhinavk@codeaurora.org> Cc: Jonathan Marek <jonathan@marek.ca>, Stephen Boyd <sboyd@kernel.org>, David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org Subject: [PATCH v2 2/4] drm/msm: make msm_disp_state transient data struct Date: Tue, 27 Apr 2021 03:18:26 +0300 [thread overview] Message-ID: <20210427001828.2375555-3-dmitry.baryshkov@linaro.org> (raw) In-Reply-To: <20210427001828.2375555-1-dmitry.baryshkov@linaro.org> Instead of allocating snapshotting structure at the driver probe time and later handling concurrent access, actual state, etc, make msm_disp_state transient struct. Allocate one when snapshotting happens and free it after coredump data is read by userspace. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> --- drivers/gpu/drm/msm/disp/msm_disp_snapshot.c | 90 ++++++------------- drivers/gpu/drm/msm/disp/msm_disp_snapshot.h | 13 +-- .../gpu/drm/msm/disp/msm_disp_snapshot_util.c | 5 +- drivers/gpu/drm/msm/msm_kms.h | 6 +- 4 files changed, 37 insertions(+), 77 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c index 70fd5a1fe13e..a4a7cb06bc87 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c @@ -7,8 +7,7 @@ #include "msm_disp_snapshot.h" -#ifdef CONFIG_DEV_COREDUMP -static ssize_t disp_devcoredump_read(char *buffer, loff_t offset, +static ssize_t __maybe_unused disp_devcoredump_read(char *buffer, loff_t offset, size_t count, void *data, size_t datalen) { struct drm_print_iterator iter; @@ -29,52 +28,47 @@ static ssize_t disp_devcoredump_read(char *buffer, loff_t offset, return count - iter.remain; } -static void disp_devcoredump_free(void *data) +static void _msm_disp_snapshot_work(struct kthread_work *work) { + struct msm_kms *kms = container_of(work, struct msm_kms, dump_work); + struct drm_device *drm_dev = kms->dev; struct msm_disp_state *disp_state; + struct drm_printer p; - disp_state = data; - - msm_disp_state_free(disp_state); + disp_state = kzalloc(sizeof(struct msm_disp_state), GFP_KERNEL); + if (!disp_state) + return; - disp_state->coredump_pending = false; -} -#endif /* CONFIG_DEV_COREDUMP */ + disp_state->dev = drm_dev->dev; + disp_state->drm_dev = drm_dev; -static void _msm_disp_snapshot_work(struct kthread_work *work) -{ - struct msm_disp_state *disp_state = container_of(work, struct msm_disp_state, dump_work); - struct drm_printer p; + INIT_LIST_HEAD(&disp_state->blocks); - mutex_lock(&disp_state->mutex); + /* Serialize dumping here */ + mutex_lock(&kms->dump_mutex); msm_disp_snapshot_capture_state(disp_state); + mutex_unlock(&kms->dump_mutex); + if (MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE) { p = drm_info_printer(disp_state->drm_dev->dev); msm_disp_state_print(disp_state, &p); } /* - * if devcoredump is not defined free the state immediately - * otherwise it will be freed in the free handler. + * If COREDUMP is disabled, the stub will call the free function. + * If there is a codedump pending for the device, the dev_coredumpm() + * will also free new coredump state. */ -#ifdef CONFIG_DEV_COREDUMP dev_coredumpm(disp_state->dev, THIS_MODULE, disp_state, 0, GFP_KERNEL, - disp_devcoredump_read, disp_devcoredump_free); - disp_state->coredump_pending = true; -#else - msm_disp_state_free(disp_state); -#endif - - mutex_unlock(&disp_state->mutex); + disp_devcoredump_read, msm_disp_state_free); } void msm_disp_snapshot_state(struct drm_device *drm_dev) { struct msm_drm_private *priv; struct msm_kms *kms; - struct msm_disp_state *disp_state; if (!drm_dev) { DRM_ERROR("invalid params\n"); @@ -83,30 +77,13 @@ void msm_disp_snapshot_state(struct drm_device *drm_dev) priv = drm_dev->dev_private; kms = priv->kms; - disp_state = kms->disp_state; - - if (!disp_state) { - DRM_ERROR("invalid params\n"); - return; - } - /* - * if there is a coredump pending return immediately till dump - * if read by userspace or timeout happens - */ - if (disp_state->coredump_pending) { - DRM_DEBUG("coredump is pending read\n"); - return; - } - - kthread_queue_work(disp_state->dump_worker, - &disp_state->dump_work); + kthread_queue_work(kms->dump_worker, &kms->dump_work); } int msm_disp_snapshot_init(struct drm_device *drm_dev) { struct msm_drm_private *priv; - struct msm_disp_state *disp_state; struct msm_kms *kms; if (!drm_dev) { @@ -117,22 +94,13 @@ int msm_disp_snapshot_init(struct drm_device *drm_dev) priv = drm_dev->dev_private; kms = priv->kms; - disp_state = devm_kzalloc(drm_dev->dev, sizeof(struct msm_disp_state), GFP_KERNEL); - - mutex_init(&disp_state->mutex); + mutex_init(&kms->dump_mutex); - disp_state->dev = drm_dev->dev; - disp_state->drm_dev = drm_dev; - - INIT_LIST_HEAD(&disp_state->blocks); - - disp_state->dump_worker = kthread_create_worker(0, "%s", "disp_snapshot"); - if (IS_ERR(disp_state->dump_worker)) + kms->dump_worker = kthread_create_worker(0, "%s", "disp_snapshot"); + if (IS_ERR(kms->dump_worker)) DRM_ERROR("failed to create disp state task\n"); - kthread_init_work(&disp_state->dump_work, _msm_disp_snapshot_work); - - kms->disp_state = disp_state; + kthread_init_work(&kms->dump_work, _msm_disp_snapshot_work); return 0; } @@ -141,7 +109,6 @@ void msm_disp_snapshot_destroy(struct drm_device *drm_dev) { struct msm_kms *kms; struct msm_drm_private *priv; - struct msm_disp_state *disp_state; if (!drm_dev) { DRM_ERROR("invalid params\n"); @@ -150,12 +117,9 @@ void msm_disp_snapshot_destroy(struct drm_device *drm_dev) priv = drm_dev->dev_private; kms = priv->kms; - disp_state = kms->disp_state; - - if (disp_state->dump_worker) - kthread_destroy_worker(disp_state->dump_worker); - list_del(&disp_state->blocks); + if (kms->dump_worker) + kthread_destroy_worker(kms->dump_worker); - mutex_destroy(&disp_state->mutex); + mutex_destroy(&kms->dump_mutex); } diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h index 32f52799a1ba..c6174a366095 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h @@ -41,26 +41,17 @@ * struct msm_disp_state - structure to store current dpu state * @dev: device pointer * @drm_dev: drm device pointer - * @mutex: mutex to serialize access to serialze dumps, debugfs access - * @coredump_pending: coredump is pending read from userspace * @atomic_state: atomic state duplicated at the time of the error - * @dump_worker: kworker thread which runs the dump work - * @dump_work: kwork which dumps the registers and drm state * @timestamp: timestamp at which the coredump was captured */ struct msm_disp_state { struct device *dev; struct drm_device *drm_dev; - struct mutex mutex; - - bool coredump_pending; struct list_head blocks; struct drm_atomic_state *atomic_state; - struct kthread_worker *dump_worker; - struct kthread_work dump_work; ktime_t timestamp; }; @@ -123,11 +114,11 @@ void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state); /** * msm_disp_state_free - free the memory after the coredump has been read - * @disp_state: handle to struct msm_disp_state + * @data: handle to struct msm_disp_state * Returns: none */ -void msm_disp_state_free(struct msm_disp_state *disp_state); +void msm_disp_state_free(void *data); /** * msm_disp_snapshot_add_block - add a hardware block with its register dump diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c index ca6632550337..cabe15190ec1 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c @@ -142,8 +142,9 @@ void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state) msm_disp_capture_atomic_state(disp_state); } -void msm_disp_state_free(struct msm_disp_state *disp_state) +void msm_disp_state_free(void *data) { + struct msm_disp_state *disp_state = data; struct msm_disp_state_block *block, *tmp; if (disp_state->atomic_state) { @@ -156,6 +157,8 @@ void msm_disp_state_free(struct msm_disp_state *disp_state) kfree(block->state); kfree(block); } + + kfree(disp_state); } void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len, diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h index 146dcab123f4..086a2d59b8c8 100644 --- a/drivers/gpu/drm/msm/msm_kms.h +++ b/drivers/gpu/drm/msm/msm_kms.h @@ -156,8 +156,10 @@ struct msm_kms { /* mapper-id used to request GEM buffer mapped for scanout: */ struct msm_gem_address_space *aspace; - /* handle to disp snapshot state */ - struct msm_disp_state *disp_state; + /* disp snapshot support */ + struct kthread_worker *dump_worker; + struct kthread_work dump_work; + struct mutex dump_mutex; /* * For async commit, where ->flush_commit() and later happens -- 2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> To: Bjorn Andersson <bjorn.andersson@linaro.org>, Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>, Abhinav Kumar <abhinavk@codeaurora.org> Cc: Jonathan Marek <jonathan@marek.ca>, Stephen Boyd <sboyd@kernel.org>, linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.org, David Airlie <airlied@linux.ie>, freedreno@lists.freedesktop.org Subject: [PATCH v2 2/4] drm/msm: make msm_disp_state transient data struct Date: Tue, 27 Apr 2021 03:18:26 +0300 [thread overview] Message-ID: <20210427001828.2375555-3-dmitry.baryshkov@linaro.org> (raw) In-Reply-To: <20210427001828.2375555-1-dmitry.baryshkov@linaro.org> Instead of allocating snapshotting structure at the driver probe time and later handling concurrent access, actual state, etc, make msm_disp_state transient struct. Allocate one when snapshotting happens and free it after coredump data is read by userspace. Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> --- drivers/gpu/drm/msm/disp/msm_disp_snapshot.c | 90 ++++++------------- drivers/gpu/drm/msm/disp/msm_disp_snapshot.h | 13 +-- .../gpu/drm/msm/disp/msm_disp_snapshot_util.c | 5 +- drivers/gpu/drm/msm/msm_kms.h | 6 +- 4 files changed, 37 insertions(+), 77 deletions(-) diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c index 70fd5a1fe13e..a4a7cb06bc87 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.c @@ -7,8 +7,7 @@ #include "msm_disp_snapshot.h" -#ifdef CONFIG_DEV_COREDUMP -static ssize_t disp_devcoredump_read(char *buffer, loff_t offset, +static ssize_t __maybe_unused disp_devcoredump_read(char *buffer, loff_t offset, size_t count, void *data, size_t datalen) { struct drm_print_iterator iter; @@ -29,52 +28,47 @@ static ssize_t disp_devcoredump_read(char *buffer, loff_t offset, return count - iter.remain; } -static void disp_devcoredump_free(void *data) +static void _msm_disp_snapshot_work(struct kthread_work *work) { + struct msm_kms *kms = container_of(work, struct msm_kms, dump_work); + struct drm_device *drm_dev = kms->dev; struct msm_disp_state *disp_state; + struct drm_printer p; - disp_state = data; - - msm_disp_state_free(disp_state); + disp_state = kzalloc(sizeof(struct msm_disp_state), GFP_KERNEL); + if (!disp_state) + return; - disp_state->coredump_pending = false; -} -#endif /* CONFIG_DEV_COREDUMP */ + disp_state->dev = drm_dev->dev; + disp_state->drm_dev = drm_dev; -static void _msm_disp_snapshot_work(struct kthread_work *work) -{ - struct msm_disp_state *disp_state = container_of(work, struct msm_disp_state, dump_work); - struct drm_printer p; + INIT_LIST_HEAD(&disp_state->blocks); - mutex_lock(&disp_state->mutex); + /* Serialize dumping here */ + mutex_lock(&kms->dump_mutex); msm_disp_snapshot_capture_state(disp_state); + mutex_unlock(&kms->dump_mutex); + if (MSM_DISP_SNAPSHOT_DUMP_IN_CONSOLE) { p = drm_info_printer(disp_state->drm_dev->dev); msm_disp_state_print(disp_state, &p); } /* - * if devcoredump is not defined free the state immediately - * otherwise it will be freed in the free handler. + * If COREDUMP is disabled, the stub will call the free function. + * If there is a codedump pending for the device, the dev_coredumpm() + * will also free new coredump state. */ -#ifdef CONFIG_DEV_COREDUMP dev_coredumpm(disp_state->dev, THIS_MODULE, disp_state, 0, GFP_KERNEL, - disp_devcoredump_read, disp_devcoredump_free); - disp_state->coredump_pending = true; -#else - msm_disp_state_free(disp_state); -#endif - - mutex_unlock(&disp_state->mutex); + disp_devcoredump_read, msm_disp_state_free); } void msm_disp_snapshot_state(struct drm_device *drm_dev) { struct msm_drm_private *priv; struct msm_kms *kms; - struct msm_disp_state *disp_state; if (!drm_dev) { DRM_ERROR("invalid params\n"); @@ -83,30 +77,13 @@ void msm_disp_snapshot_state(struct drm_device *drm_dev) priv = drm_dev->dev_private; kms = priv->kms; - disp_state = kms->disp_state; - - if (!disp_state) { - DRM_ERROR("invalid params\n"); - return; - } - /* - * if there is a coredump pending return immediately till dump - * if read by userspace or timeout happens - */ - if (disp_state->coredump_pending) { - DRM_DEBUG("coredump is pending read\n"); - return; - } - - kthread_queue_work(disp_state->dump_worker, - &disp_state->dump_work); + kthread_queue_work(kms->dump_worker, &kms->dump_work); } int msm_disp_snapshot_init(struct drm_device *drm_dev) { struct msm_drm_private *priv; - struct msm_disp_state *disp_state; struct msm_kms *kms; if (!drm_dev) { @@ -117,22 +94,13 @@ int msm_disp_snapshot_init(struct drm_device *drm_dev) priv = drm_dev->dev_private; kms = priv->kms; - disp_state = devm_kzalloc(drm_dev->dev, sizeof(struct msm_disp_state), GFP_KERNEL); - - mutex_init(&disp_state->mutex); + mutex_init(&kms->dump_mutex); - disp_state->dev = drm_dev->dev; - disp_state->drm_dev = drm_dev; - - INIT_LIST_HEAD(&disp_state->blocks); - - disp_state->dump_worker = kthread_create_worker(0, "%s", "disp_snapshot"); - if (IS_ERR(disp_state->dump_worker)) + kms->dump_worker = kthread_create_worker(0, "%s", "disp_snapshot"); + if (IS_ERR(kms->dump_worker)) DRM_ERROR("failed to create disp state task\n"); - kthread_init_work(&disp_state->dump_work, _msm_disp_snapshot_work); - - kms->disp_state = disp_state; + kthread_init_work(&kms->dump_work, _msm_disp_snapshot_work); return 0; } @@ -141,7 +109,6 @@ void msm_disp_snapshot_destroy(struct drm_device *drm_dev) { struct msm_kms *kms; struct msm_drm_private *priv; - struct msm_disp_state *disp_state; if (!drm_dev) { DRM_ERROR("invalid params\n"); @@ -150,12 +117,9 @@ void msm_disp_snapshot_destroy(struct drm_device *drm_dev) priv = drm_dev->dev_private; kms = priv->kms; - disp_state = kms->disp_state; - - if (disp_state->dump_worker) - kthread_destroy_worker(disp_state->dump_worker); - list_del(&disp_state->blocks); + if (kms->dump_worker) + kthread_destroy_worker(kms->dump_worker); - mutex_destroy(&disp_state->mutex); + mutex_destroy(&kms->dump_mutex); } diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h index 32f52799a1ba..c6174a366095 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h @@ -41,26 +41,17 @@ * struct msm_disp_state - structure to store current dpu state * @dev: device pointer * @drm_dev: drm device pointer - * @mutex: mutex to serialize access to serialze dumps, debugfs access - * @coredump_pending: coredump is pending read from userspace * @atomic_state: atomic state duplicated at the time of the error - * @dump_worker: kworker thread which runs the dump work - * @dump_work: kwork which dumps the registers and drm state * @timestamp: timestamp at which the coredump was captured */ struct msm_disp_state { struct device *dev; struct drm_device *drm_dev; - struct mutex mutex; - - bool coredump_pending; struct list_head blocks; struct drm_atomic_state *atomic_state; - struct kthread_worker *dump_worker; - struct kthread_work dump_work; ktime_t timestamp; }; @@ -123,11 +114,11 @@ void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state); /** * msm_disp_state_free - free the memory after the coredump has been read - * @disp_state: handle to struct msm_disp_state + * @data: handle to struct msm_disp_state * Returns: none */ -void msm_disp_state_free(struct msm_disp_state *disp_state); +void msm_disp_state_free(void *data); /** * msm_disp_snapshot_add_block - add a hardware block with its register dump diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c index ca6632550337..cabe15190ec1 100644 --- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c +++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c @@ -142,8 +142,9 @@ void msm_disp_snapshot_capture_state(struct msm_disp_state *disp_state) msm_disp_capture_atomic_state(disp_state); } -void msm_disp_state_free(struct msm_disp_state *disp_state) +void msm_disp_state_free(void *data) { + struct msm_disp_state *disp_state = data; struct msm_disp_state_block *block, *tmp; if (disp_state->atomic_state) { @@ -156,6 +157,8 @@ void msm_disp_state_free(struct msm_disp_state *disp_state) kfree(block->state); kfree(block); } + + kfree(disp_state); } void msm_disp_snapshot_add_block(struct msm_disp_state *disp_state, u32 len, diff --git a/drivers/gpu/drm/msm/msm_kms.h b/drivers/gpu/drm/msm/msm_kms.h index 146dcab123f4..086a2d59b8c8 100644 --- a/drivers/gpu/drm/msm/msm_kms.h +++ b/drivers/gpu/drm/msm/msm_kms.h @@ -156,8 +156,10 @@ struct msm_kms { /* mapper-id used to request GEM buffer mapped for scanout: */ struct msm_gem_address_space *aspace; - /* handle to disp snapshot state */ - struct msm_disp_state *disp_state; + /* disp snapshot support */ + struct kthread_worker *dump_worker; + struct kthread_work dump_work; + struct mutex dump_mutex; /* * For async commit, where ->flush_commit() and later happens -- 2.30.2 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel
next prev parent reply other threads:[~2021-04-27 0:18 UTC|newest] Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-04-27 0:18 [PATCH v2 0/4] drm/msm: improve register snapshotting Dmitry Baryshkov 2021-04-27 0:18 ` Dmitry Baryshkov 2021-04-27 0:18 ` [PATCH v2 1/4] drm/msm: pass dump state as a function argument Dmitry Baryshkov 2021-04-27 0:18 ` Dmitry Baryshkov 2021-04-27 0:18 ` Dmitry Baryshkov [this message] 2021-04-27 0:18 ` [PATCH v2 2/4] drm/msm: make msm_disp_state transient data struct Dmitry Baryshkov 2021-04-27 19:19 ` [Freedreno] " abhinavk 2021-04-27 19:19 ` abhinavk 2021-04-27 20:29 ` Dmitry Baryshkov 2021-04-27 20:29 ` Dmitry Baryshkov 2021-04-27 22:11 ` abhinavk 2021-04-27 22:11 ` abhinavk 2021-04-27 0:18 ` [PATCH v2 3/4] drm/msm: get rid of msm_iomap_size Dmitry Baryshkov 2021-04-27 0:18 ` Dmitry Baryshkov 2021-04-27 19:29 ` [Freedreno] " abhinavk 2021-04-27 19:29 ` abhinavk 2021-04-27 20:32 ` Dmitry Baryshkov 2021-04-27 20:32 ` Dmitry Baryshkov 2021-04-27 22:12 ` abhinavk 2021-04-27 22:12 ` abhinavk 2021-04-28 2:47 ` Bjorn Andersson 2021-04-28 2:47 ` Bjorn Andersson 2021-04-28 13:41 ` Dmitry Baryshkov 2021-04-28 13:41 ` Dmitry Baryshkov 2021-04-28 13:59 ` Bjorn Andersson 2021-04-28 13:59 ` Bjorn Andersson 2021-04-28 14:03 ` Dmitry Baryshkov 2021-04-28 14:03 ` Dmitry Baryshkov 2021-04-27 0:18 ` [PATCH v2 4/4] drm/msm/dsi: add DSI PHY registers to snapshot data Dmitry Baryshkov 2021-04-27 0:18 ` Dmitry Baryshkov 2021-04-27 22:14 ` abhinavk 2021-04-27 22:14 ` abhinavk 2021-04-27 19:10 ` [PATCH v2 0/4] drm/msm: improve register snapshotting abhinavk 2021-04-27 19:10 ` abhinavk
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