On Tue, Jan 23, 2024 at 01:04:24PM +0000, Matt Coster wrote: > From: Donald Robson <donald.rob...@imgtec.com> > > When the kernel driver 'loses' the device, for instance if the firmware > stops communicating, the driver calls drm_dev_unplug(). This is > currently done inside the drm_dev_enter() critical section, which isn't > permitted. In addition, the bool that marks the device as lost is not > atomic or protected by a lock. > > This fix replaces the bool with an atomic that also acts as a mechanism > to ensure the device is unplugged after drm_dev_exit(), preventing a > concurrent call to drm_dev_enter() from succeeding in a race between it > and drm_dev_unplug().
Uh ... atomic_t does not make locking. >From a quick look this entire thing smells a bit like bad design overall, and my gut feeling is that you probably want to rip out pvr_dev->lost outright. Or alternatively, explain what exactly this does beyond drm_dev_enter/exit, and then probably add that functionality there instead of hand-roll lockless trickery in drivers. >From a quick look keeping track of where you realize the device is lost and then calling drm_dev_unplug after the drm_dev_exit is probably the clean solution. That also means the drm_dev_unplug() is not delayed due to a drm_dev_enter/exit section on a different thread, which is probably a good thing. Cheers, Sima > > Reported-by: Steven Price <steven.pr...@arm.com> > Closes: > https://lore.kernel.org/dri-devel/1b957ca4-71cf-42fd-ac81-1920592b9...@arm.com/ > Fixes: cc1aeedb98ad ("drm/imagination: Implement firmware infrastructure and > META FW support") > Signed-off-by: Donald Robson <donald.rob...@imgtec.com> > Signed-off-by: Matt Coster <matt.cos...@imgtec.com> > --- > drivers/gpu/drm/imagination/pvr_ccb.c | 2 +- > drivers/gpu/drm/imagination/pvr_device.c | 98 +++++++++++++++++++++- > drivers/gpu/drm/imagination/pvr_device.h | 72 +++++++++++++--- > drivers/gpu/drm/imagination/pvr_drv.c | 87 ++++++++++--------- > drivers/gpu/drm/imagination/pvr_fw.c | 12 +-- > drivers/gpu/drm/imagination/pvr_fw_trace.c | 4 +- > drivers/gpu/drm/imagination/pvr_mmu.c | 20 ++--- > drivers/gpu/drm/imagination/pvr_power.c | 42 +++------- > drivers/gpu/drm/imagination/pvr_power.h | 2 - > 9 files changed, 237 insertions(+), 102 deletions(-) > > diff --git a/drivers/gpu/drm/imagination/pvr_ccb.c > b/drivers/gpu/drm/imagination/pvr_ccb.c > index 4deeac7ed40a..1fe64adc0c2c 100644 > --- a/drivers/gpu/drm/imagination/pvr_ccb.c > +++ b/drivers/gpu/drm/imagination/pvr_ccb.c > @@ -247,7 +247,7 @@ pvr_kccb_send_cmd_reserved_powered(struct pvr_device > *pvr_dev, > u32 old_write_offset; > u32 new_write_offset; > > - WARN_ON(pvr_dev->lost); > + WARN_ON(pvr_device_is_lost(pvr_dev)); > > mutex_lock(&pvr_ccb->lock); > > diff --git a/drivers/gpu/drm/imagination/pvr_device.c > b/drivers/gpu/drm/imagination/pvr_device.c > index 1704c0268589..397491375b7d 100644 > --- a/drivers/gpu/drm/imagination/pvr_device.c > +++ b/drivers/gpu/drm/imagination/pvr_device.c > @@ -6,14 +6,15 @@ > > #include "pvr_fw.h" > #include "pvr_params.h" > -#include "pvr_power.h" > #include "pvr_queue.h" > #include "pvr_rogue_cr_defs.h" > #include "pvr_stream.h" > #include "pvr_vm.h" > > +#include <drm/drm_drv.h> > #include <drm/drm_print.h> > > +#include <linux/atomic.h> > #include <linux/bitfield.h> > #include <linux/clk.h> > #include <linux/compiler_attributes.h> > @@ -556,6 +557,101 @@ pvr_device_fini(struct pvr_device *pvr_dev) > pvr_device_gpu_fini(pvr_dev); > } > > +/** > + * pvr_device_enter() - Try to enter device critical section. > + * @pvr_dev: Target PowerVR device. > + * @idx: Pointer to index that will be passed to the matching > pvr_device_exit(). > + * > + * Use this in place of drm_dev_enter() within this driver. > + * > + * Returns: > + * * %true if the critical section was entered, or > + * * %false otherwise. > + */ > +bool pvr_device_enter(struct pvr_device *pvr_dev, int *idx) > +{ > + const enum pvr_device_state old_state = > + atomic_cmpxchg(&pvr_dev->state, > + PVR_DEVICE_STATE_PRESENT, > + PVR_DEVICE_STATE_ENTERED); > + > + switch (old_state) { > + case PVR_DEVICE_STATE_PRESENT: > + case PVR_DEVICE_STATE_ENTERED: > + return drm_dev_enter(from_pvr_device(pvr_dev), idx); > + > + case PVR_DEVICE_STATE_LOST: > + case PVR_DEVICE_STATE_LOST_UNPLUGGED: > + WARN_ONCE(1, "Attempt to use GPU after becoming lost."); > + break; > + } > + > + return false; > +} > + > +/** > + * pvr_device_exit() - Exit a device critical section. > + * @pvr_dev: Target PowerVR device. > + * @idx: Index given by matching pvr_device_enter(). > + * > + * Use this in place of drm_dev_exit() within this driver. > + */ > +void pvr_device_exit(struct pvr_device *pvr_dev, int idx) > +{ > + const enum pvr_device_state old_state = > + atomic_cmpxchg(&pvr_dev->state, > + PVR_DEVICE_STATE_ENTERED, > + PVR_DEVICE_STATE_PRESENT); > + > + switch (old_state) { > + case PVR_DEVICE_STATE_PRESENT: > + case PVR_DEVICE_STATE_ENTERED: > + drm_dev_exit(idx); > + return; > + > + case PVR_DEVICE_STATE_LOST: > + /* Unplug the device if it was lost during the critical > section. */ > + atomic_set(&pvr_dev->state, PVR_DEVICE_STATE_LOST_UNPLUGGED); > + > + drm_dev_exit(idx); > + > + WARN_ONCE(1, "GPU lost and now unplugged."); > + drm_dev_unplug(from_pvr_device(pvr_dev)); > + > + return; > + > + case PVR_DEVICE_STATE_LOST_UNPLUGGED: > + WARN_ONCE(1, "GPU unplugged during critical section."); > + drm_dev_exit(idx); > + return; > + } > +} > + > +/** > + * pvr_device_set_lost() - Mark GPU device as lost. > + * @pvr_dev: Target PowerVR device. > + * > + * This will cause the DRM device to be unplugged at the next call to > + * pvr_device_exit(). > + */ > +void pvr_device_set_lost(struct pvr_device *pvr_dev) > +{ > + /* > + * Unplug the device immediately if the device is not in a critical > + * section. > + */ > + const bool unplug = atomic_cmpxchg(&pvr_dev->state, > + PVR_DEVICE_STATE_PRESENT, > + PVR_DEVICE_STATE_LOST_UNPLUGGED) == > + PVR_DEVICE_STATE_PRESENT; > + > + if (unplug) > + drm_dev_unplug(from_pvr_device(pvr_dev)); > + else > + atomic_cmpxchg(&pvr_dev->state, PVR_DEVICE_STATE_ENTERED, > + PVR_DEVICE_STATE_LOST); > +} > + > bool > pvr_device_has_uapi_quirk(struct pvr_device *pvr_dev, u32 quirk) > { > diff --git a/drivers/gpu/drm/imagination/pvr_device.h > b/drivers/gpu/drm/imagination/pvr_device.h > index ecdd5767d8ef..7c08b2bda395 100644 > --- a/drivers/gpu/drm/imagination/pvr_device.h > +++ b/drivers/gpu/drm/imagination/pvr_device.h > @@ -274,20 +274,19 @@ struct pvr_device { > } kccb; > > /** > - * @lost: %true if the device has been lost. > - * > - * This variable is set if the device has become irretrievably > unavailable, e.g. if the > - * firmware processor has stopped responding and can not be revived via > a hard reset. > + * @state: Indicates whether the device is present and in use. One of > + * &enum pvr_device_state. > */ > - bool lost; > + atomic_t state; > > /** > * @reset_sem: Reset semaphore. > * > - * GPU reset code will lock this for writing. Any code that submits > commands to the firmware > - * that isn't in an IRQ handler or on the scheduler workqueue must lock > this for reading. > - * Once this has been successfully locked, &pvr_dev->lost _must_ be > checked, and -%EIO must > - * be returned if it is set. > + * GPU reset code will lock this for writing. Any code that submits > + * commands to the firmware that isn't in an IRQ handler or on the > + * scheduler workqueue must lock this for reading. > + * Once this has been successfully locked, pvr_device_is_lost() _must_ > + * be checked, and -%EIO must be returned if it is. > */ > struct rw_semaphore reset_sem; > > @@ -487,7 +486,60 @@ packed_bvnc_to_pvr_gpu_id(u64 bvnc, struct pvr_gpu_id > *gpu_id) > > int pvr_device_init(struct pvr_device *pvr_dev); > void pvr_device_fini(struct pvr_device *pvr_dev); > -void pvr_device_reset(struct pvr_device *pvr_dev); > + > +/** > + * enum pvr_device_state - States used by &struct pvr_device.state. > + */ > +enum pvr_device_state { > + /** @PVR_DEVICE_STATE_PRESENT: The device is available for use. */ > + PVR_DEVICE_STATE_PRESENT, > + > + /** @PVR_DEVICE_STATE_ENTERED: The device is in a critical section. */ > + PVR_DEVICE_STATE_ENTERED, > + > + /** > + * @PVR_DEVICE_STATE_LOST: The device was lost during the current device > + * critical section and will be unplugged once the section exits. > + */ > + PVR_DEVICE_STATE_LOST, > + > + /** > + * @PVR_DEVICE_STATE_LOST_UNPLUGGED: The device was lost and > + * subsequently unplugged. > + * > + * The device may become irretrievably unavailable, e.g. if the firmware > + * processor has stopped responding and can not be revived via a hard > + * reset. > + */ > + PVR_DEVICE_STATE_LOST_UNPLUGGED, > +}; > + > +/** > + * pvr_device_is_lost() - Check if GPU device has been marked lost. > + * @pvr_dev: Target PowerVR device. > + * > + * Returns: > + * * %true if device is lost, or > + * * %false otherwise. > + */ > +static __always_inline bool pvr_device_is_lost(struct pvr_device *pvr_dev) > +{ > + switch ((enum pvr_device_state)atomic_read(&pvr_dev->state)) { > + case PVR_DEVICE_STATE_PRESENT: > + case PVR_DEVICE_STATE_ENTERED: > + return false; > + > + case PVR_DEVICE_STATE_LOST: > + case PVR_DEVICE_STATE_LOST_UNPLUGGED: > + break; > + } > + > + return true; > +} > + > +bool pvr_device_enter(struct pvr_device *pvr_dev, int *idx); > +void pvr_device_exit(struct pvr_device *pvr_dev, int idx); > +void pvr_device_set_lost(struct pvr_device *pvr_dev); > > bool > pvr_device_has_uapi_quirk(struct pvr_device *pvr_dev, u32 quirk); > diff --git a/drivers/gpu/drm/imagination/pvr_drv.c > b/drivers/gpu/drm/imagination/pvr_drv.c > index 5c3b2d58d766..55bea656a40f 100644 > --- a/drivers/gpu/drm/imagination/pvr_drv.c > +++ b/drivers/gpu/drm/imagination/pvr_drv.c > @@ -81,13 +81,13 @@ pvr_ioctl_create_bo(struct drm_device *drm_dev, void > *raw_args, > int idx; > int err; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > /* All padding fields must be zeroed. */ > if (args->_padding_c != 0) { > err = -EINVAL; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > /* > @@ -101,7 +101,7 @@ pvr_ioctl_create_bo(struct drm_device *drm_dev, void > *raw_args, > if (args->size > SIZE_MAX || args->size == 0 || args->flags & > ~DRM_PVR_BO_FLAGS_MASK || args->size & (PVR_DEVICE_PAGE_SIZE - 1)) { > err = -EINVAL; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > sanitized_size = (size_t)args->size; > @@ -113,7 +113,7 @@ pvr_ioctl_create_bo(struct drm_device *drm_dev, void > *raw_args, > pvr_obj = pvr_gem_object_create(pvr_dev, sanitized_size, args->flags); > if (IS_ERR(pvr_obj)) { > err = PTR_ERR(pvr_obj); > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > /* This function will not modify &args->handle unless it succeeds. */ > @@ -121,7 +121,7 @@ pvr_ioctl_create_bo(struct drm_device *drm_dev, void > *raw_args, > if (err) > goto err_destroy_obj; > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return 0; > > @@ -133,8 +133,8 @@ pvr_ioctl_create_bo(struct drm_device *drm_dev, void > *raw_args, > */ > pvr_gem_object_put(pvr_obj); > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return err; > } > @@ -164,19 +164,20 @@ pvr_ioctl_get_bo_mmap_offset(struct drm_device > *drm_dev, void *raw_args, > struct drm_file *file) > { > struct drm_pvr_ioctl_get_bo_mmap_offset_args *args = raw_args; > + struct pvr_device *pvr_dev = to_pvr_device(drm_dev); > struct pvr_file *pvr_file = to_pvr_file(file); > struct pvr_gem_object *pvr_obj; > struct drm_gem_object *gem_obj; > int idx; > int ret; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > /* All padding fields must be zeroed. */ > if (args->_padding_4 != 0) { > ret = -EINVAL; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > /* > @@ -188,7 +189,7 @@ pvr_ioctl_get_bo_mmap_offset(struct drm_device *drm_dev, > void *raw_args, > pvr_obj = pvr_gem_object_from_handle(pvr_file, args->handle); > if (!pvr_obj) { > ret = -ENOENT; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > gem_obj = gem_from_pvr_gem(pvr_obj); > @@ -202,7 +203,7 @@ pvr_ioctl_get_bo_mmap_offset(struct drm_device *drm_dev, > void *raw_args, > if (ret != 0) { > /* Drop our reference to the buffer object. */ > drm_gem_object_put(gem_obj); > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > /* > @@ -214,8 +215,8 @@ pvr_ioctl_get_bo_mmap_offset(struct drm_device *drm_dev, > void *raw_args, > /* Drop our reference to the buffer object. */ > pvr_gem_object_put(pvr_obj); > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return ret; > } > @@ -626,7 +627,7 @@ pvr_ioctl_dev_query(struct drm_device *drm_dev, void > *raw_args, > int idx; > int ret = -EINVAL; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > switch ((enum drm_pvr_dev_query)args->type) { > @@ -655,7 +656,7 @@ pvr_ioctl_dev_query(struct drm_device *drm_dev, void > *raw_args, > break; > } > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return ret; > } > @@ -680,16 +681,17 @@ pvr_ioctl_create_context(struct drm_device *drm_dev, > void *raw_args, > struct drm_file *file) > { > struct drm_pvr_ioctl_create_context_args *args = raw_args; > + struct pvr_device *pvr_dev = to_pvr_device(drm_dev); > struct pvr_file *pvr_file = file->driver_priv; > int idx; > int ret; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > ret = pvr_context_create(pvr_file, args); > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return ret; > } > @@ -738,18 +740,19 @@ pvr_ioctl_create_free_list(struct drm_device *drm_dev, > void *raw_args, > struct drm_file *file) > { > struct drm_pvr_ioctl_create_free_list_args *args = raw_args; > + struct pvr_device *pvr_dev = to_pvr_device(drm_dev); > struct pvr_file *pvr_file = to_pvr_file(file); > struct pvr_free_list *free_list; > int idx; > int err; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > free_list = pvr_free_list_create(pvr_file, args); > if (IS_ERR(free_list)) { > err = PTR_ERR(free_list); > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > /* Allocate object handle for userspace. */ > @@ -761,15 +764,15 @@ pvr_ioctl_create_free_list(struct drm_device *drm_dev, > void *raw_args, > if (err < 0) > goto err_cleanup; > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return 0; > > err_cleanup: > pvr_free_list_put(free_list); > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return err; > } > @@ -824,18 +827,19 @@ pvr_ioctl_create_hwrt_dataset(struct drm_device > *drm_dev, void *raw_args, > struct drm_file *file) > { > struct drm_pvr_ioctl_create_hwrt_dataset_args *args = raw_args; > + struct pvr_device *pvr_dev = to_pvr_device(drm_dev); > struct pvr_file *pvr_file = to_pvr_file(file); > struct pvr_hwrt_dataset *hwrt; > int idx; > int err; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > hwrt = pvr_hwrt_dataset_create(pvr_file, args); > if (IS_ERR(hwrt)) { > err = PTR_ERR(hwrt); > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > /* Allocate object handle for userspace. */ > @@ -847,15 +851,15 @@ pvr_ioctl_create_hwrt_dataset(struct drm_device > *drm_dev, void *raw_args, > if (err < 0) > goto err_cleanup; > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return 0; > > err_cleanup: > pvr_hwrt_dataset_put(hwrt); > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return err; > } > @@ -910,23 +914,24 @@ pvr_ioctl_create_vm_context(struct drm_device *drm_dev, > void *raw_args, > struct drm_file *file) > { > struct drm_pvr_ioctl_create_vm_context_args *args = raw_args; > + struct pvr_device *pvr_dev = to_pvr_device(drm_dev); > struct pvr_file *pvr_file = to_pvr_file(file); > struct pvr_vm_context *vm_ctx; > int idx; > int err; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > if (args->_padding_4) { > err = -EINVAL; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > vm_ctx = pvr_vm_create_context(pvr_file->pvr_dev, true); > if (IS_ERR(vm_ctx)) { > err = PTR_ERR(vm_ctx); > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > /* Allocate object handle for userspace. */ > @@ -938,15 +943,15 @@ pvr_ioctl_create_vm_context(struct drm_device *drm_dev, > void *raw_args, > if (err < 0) > goto err_cleanup; > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return 0; > > err_cleanup: > pvr_vm_context_put(vm_ctx); > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return err; > } > @@ -1022,26 +1027,26 @@ pvr_ioctl_vm_map(struct drm_device *drm_dev, void > *raw_args, > int idx; > int err; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > /* Initial validation of args. */ > if (args->_padding_14) { > err = -EINVAL; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > if (args->flags != 0 || > check_add_overflow(args->offset, args->size, &offset_plus_size) || > !pvr_find_heap_containing(pvr_dev, args->device_addr, args->size)) { > err = -EINVAL; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > vm_ctx = pvr_vm_context_lookup(pvr_file, args->vm_context_handle); > if (!vm_ctx) { > err = -EINVAL; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > pvr_obj = pvr_gem_object_from_handle(pvr_file, args->handle); > @@ -1079,8 +1084,8 @@ pvr_ioctl_vm_map(struct drm_device *drm_dev, void > *raw_args, > err_put_vm_context: > pvr_vm_context_put(vm_ctx); > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return err; > } > @@ -1148,12 +1153,12 @@ pvr_ioctl_submit_jobs(struct drm_device *drm_dev, > void *raw_args, > int idx; > int err; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > err = pvr_submit_jobs(pvr_dev, pvr_file, args); > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return err; > } > diff --git a/drivers/gpu/drm/imagination/pvr_fw.c > b/drivers/gpu/drm/imagination/pvr_fw.c > index 3debc9870a82..07547e167963 100644 > --- a/drivers/gpu/drm/imagination/pvr_fw.c > +++ b/drivers/gpu/drm/imagination/pvr_fw.c > @@ -1094,7 +1094,7 @@ pvr_fw_structure_cleanup(struct pvr_device *pvr_dev, > u32 type, struct pvr_fw_obj > > down_read(&pvr_dev->reset_sem); > > - if (!drm_dev_enter(from_pvr_device(pvr_dev), &idx)) { > + if (!pvr_device_enter(pvr_dev, &idx)) { > err = -EIO; > goto err_up_read; > } > @@ -1118,22 +1118,22 @@ pvr_fw_structure_cleanup(struct pvr_device *pvr_dev, > u32 type, struct pvr_fw_obj > break; > default: > err = -EINVAL; > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > err = pvr_kccb_send_cmd(pvr_dev, &cmd, &slot_nr); > if (err) > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > > err = pvr_kccb_wait_for_completion(pvr_dev, slot_nr, HZ, &rtn); > if (err) > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > > if (rtn & ROGUE_FWIF_KCCB_RTN_SLOT_CLEANUP_BUSY) > err = -EBUSY; > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > err_up_read: > up_read(&pvr_dev->reset_sem); > diff --git a/drivers/gpu/drm/imagination/pvr_fw_trace.c > b/drivers/gpu/drm/imagination/pvr_fw_trace.c > index 31199e45b72e..26d67483eac2 100644 > --- a/drivers/gpu/drm/imagination/pvr_fw_trace.c > +++ b/drivers/gpu/drm/imagination/pvr_fw_trace.c > @@ -149,7 +149,7 @@ update_logtype(struct pvr_device *pvr_dev, u32 group_mask) > fw_trace->group_mask = group_mask; > > down_read(&pvr_dev->reset_sem); > - if (!drm_dev_enter(from_pvr_device(pvr_dev), &idx)) { > + if (!pvr_device_enter(pvr_dev, &idx)) { > err = -EIO; > goto err_up_read; > } > @@ -159,7 +159,7 @@ update_logtype(struct pvr_device *pvr_dev, u32 group_mask) > > err = pvr_kccb_send_cmd(pvr_dev, &cmd, NULL); > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > err_up_read: > up_read(&pvr_dev->reset_sem); > diff --git a/drivers/gpu/drm/imagination/pvr_mmu.c > b/drivers/gpu/drm/imagination/pvr_mmu.c > index 4fe70610ed94..59911f70e9ca 100644 > --- a/drivers/gpu/drm/imagination/pvr_mmu.c > +++ b/drivers/gpu/drm/imagination/pvr_mmu.c > @@ -129,18 +129,18 @@ int pvr_mmu_flush_exec(struct pvr_device *pvr_dev, bool > wait) > u32 slot; > int idx; > > - if (!drm_dev_enter(from_pvr_device(pvr_dev), &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > /* Can't flush MMU if the firmware hasn't booted yet. */ > if (!pvr_dev->fw_dev.booted) > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > > cmd_mmu_cache_data->cache_flags = > atomic_xchg(&pvr_dev->mmu_flush_cache_flags, 0); > > if (!cmd_mmu_cache_data->cache_flags) > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > > cmd_mmu_cache.cmd_type = ROGUE_FWIF_KCCB_CMD_MMUCACHE; > > @@ -156,7 +156,7 @@ int pvr_mmu_flush_exec(struct pvr_device *pvr_dev, bool > wait) > if (err) > goto err_reset_and_retry; > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return 0; > > @@ -167,23 +167,23 @@ int pvr_mmu_flush_exec(struct pvr_device *pvr_dev, bool > wait) > */ > err = pvr_power_reset(pvr_dev, true); > if (err) > - goto err_drm_dev_exit; /* Device is lost. */ > + goto err_pvr_device_exit; /* Device is lost. */ > > /* Retry sending flush request. */ > err = pvr_kccb_send_cmd(pvr_dev, &cmd_mmu_cache, &slot); > if (err) { > - pvr_device_lost(pvr_dev); > - goto err_drm_dev_exit; > + pvr_device_set_lost(pvr_dev); > + goto err_pvr_device_exit; > } > > if (wait) { > err = pvr_kccb_wait_for_completion(pvr_dev, slot, HZ, NULL); > if (err) > - pvr_device_lost(pvr_dev); > + pvr_device_set_lost(pvr_dev); > } > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return err; > } > diff --git a/drivers/gpu/drm/imagination/pvr_power.c > b/drivers/gpu/drm/imagination/pvr_power.c > index ba7816fd28ec..c927def3d3f3 100644 > --- a/drivers/gpu/drm/imagination/pvr_power.c > +++ b/drivers/gpu/drm/imagination/pvr_power.c > @@ -23,21 +23,6 @@ > > #define WATCHDOG_TIME_MS (500) > > -/** > - * pvr_device_lost() - Mark GPU device as lost > - * @pvr_dev: Target PowerVR device. > - * > - * This will cause the DRM device to be unplugged. > - */ > -void > -pvr_device_lost(struct pvr_device *pvr_dev) > -{ > - if (!pvr_dev->lost) { > - pvr_dev->lost = true; > - drm_dev_unplug(from_pvr_device(pvr_dev)); > - } > -} > - > static int > pvr_power_send_command(struct pvr_device *pvr_dev, struct > rogue_fwif_kccb_cmd *pow_cmd) > { > @@ -186,7 +171,7 @@ pvr_watchdog_worker(struct work_struct *work) > watchdog.work.work); > bool stalled; > > - if (pvr_dev->lost) > + if (pvr_device_is_lost(pvr_dev)) > return; > > if (pm_runtime_get_if_in_use(from_pvr_device(pvr_dev)->dev) <= 0) > @@ -208,10 +193,9 @@ pvr_watchdog_worker(struct work_struct *work) > pm_runtime_put(from_pvr_device(pvr_dev)->dev); > > out_requeue: > - if (!pvr_dev->lost) { > + if (!pvr_device_is_lost(pvr_dev)) > queue_delayed_work(pvr_dev->sched_wq, &pvr_dev->watchdog.work, > msecs_to_jiffies(WATCHDOG_TIME_MS)); > - } > } > > /** > @@ -239,21 +223,21 @@ pvr_power_device_suspend(struct device *dev) > int err = 0; > int idx; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > if (pvr_dev->fw_dev.booted) { > err = pvr_power_fw_disable(pvr_dev, false); > if (err) > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > } > > clk_disable_unprepare(pvr_dev->mem_clk); > clk_disable_unprepare(pvr_dev->sys_clk); > clk_disable_unprepare(pvr_dev->core_clk); > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return err; > } > @@ -267,12 +251,12 @@ pvr_power_device_resume(struct device *dev) > int idx; > int err; > > - if (!drm_dev_enter(drm_dev, &idx)) > + if (!pvr_device_enter(pvr_dev, &idx)) > return -EIO; > > err = clk_prepare_enable(pvr_dev->core_clk); > if (err) > - goto err_drm_dev_exit; > + goto err_pvr_device_exit; > > err = clk_prepare_enable(pvr_dev->sys_clk); > if (err) > @@ -288,7 +272,7 @@ pvr_power_device_resume(struct device *dev) > goto err_mem_clk_disable; > } > > - drm_dev_exit(idx); > + pvr_device_exit(pvr_dev, idx); > > return 0; > > @@ -301,8 +285,8 @@ pvr_power_device_resume(struct device *dev) > err_core_clk_disable: > clk_disable_unprepare(pvr_dev->core_clk); > > -err_drm_dev_exit: > - drm_dev_exit(idx); > +err_pvr_device_exit: > + pvr_device_exit(pvr_dev, idx); > > return err; > } > @@ -345,7 +329,7 @@ pvr_power_reset(struct pvr_device *pvr_dev, bool > hard_reset) > > down_write(&pvr_dev->reset_sem); > > - if (pvr_dev->lost) { > + if (pvr_device_is_lost(pvr_dev)) { > err = -EIO; > goto err_up_write; > } > @@ -407,7 +391,7 @@ pvr_power_reset(struct pvr_device *pvr_dev, bool > hard_reset) > > err_device_lost: > drm_err(from_pvr_device(pvr_dev), "GPU device lost"); > - pvr_device_lost(pvr_dev); > + pvr_device_set_lost(pvr_dev); > > /* Leave IRQs disabled if the device is lost. */ > > diff --git a/drivers/gpu/drm/imagination/pvr_power.h > b/drivers/gpu/drm/imagination/pvr_power.h > index 9a9312dcb2da..360980f454d7 100644 > --- a/drivers/gpu/drm/imagination/pvr_power.h > +++ b/drivers/gpu/drm/imagination/pvr_power.h > @@ -12,8 +12,6 @@ > int pvr_watchdog_init(struct pvr_device *pvr_dev); -- Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch
