Add reference counting for allocated syncpoints to allow keeping them allocated while jobs are referencing them. Additionally, clean up various places using syncpoint IDs to use host1x_syncpt pointers instead.
Signed-off-by: Mikko Perttunen mperttunen@nvidia.com --- v5: - Remove host1x_syncpt_put in submit code, as job_put already puts the syncpoint. - Changes due to rebase in VI driver. v4: - Update from _free to _put in VI driver as well --- drivers/gpu/drm/tegra/dc.c | 4 +- drivers/gpu/drm/tegra/drm.c | 14 ++--- drivers/gpu/drm/tegra/gr2d.c | 4 +- drivers/gpu/drm/tegra/gr3d.c | 4 +- drivers/gpu/drm/tegra/vic.c | 4 +- drivers/gpu/host1x/cdma.c | 11 ++-- drivers/gpu/host1x/dev.h | 7 ++- drivers/gpu/host1x/hw/cdma_hw.c | 2 +- drivers/gpu/host1x/hw/channel_hw.c | 10 ++-- drivers/gpu/host1x/hw/debug_hw.c | 2 +- drivers/gpu/host1x/job.c | 5 +- drivers/gpu/host1x/syncpt.c | 75 +++++++++++++++++++------- drivers/gpu/host1x/syncpt.h | 3 ++ drivers/staging/media/tegra-video/vi.c | 4 +- include/linux/host1x.h | 8 +-- 15 files changed, 98 insertions(+), 59 deletions(-)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 85dd7131553a..033032dfc4b9 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -2129,7 +2129,7 @@ static int tegra_dc_init(struct host1x_client *client) drm_plane_cleanup(primary);
host1x_client_iommu_detach(client); - host1x_syncpt_free(dc->syncpt); + host1x_syncpt_put(dc->syncpt);
return err; } @@ -2154,7 +2154,7 @@ static int tegra_dc_exit(struct host1x_client *client) }
host1x_client_iommu_detach(client); - host1x_syncpt_free(dc->syncpt); + host1x_syncpt_put(dc->syncpt);
return 0; } diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index e45c8414e2a3..5a6037eff37f 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -171,7 +171,7 @@ int tegra_drm_submit(struct tegra_drm_context *context, struct drm_tegra_syncpt syncpt; struct host1x *host1x = dev_get_drvdata(drm->dev->parent); struct drm_gem_object **refs; - struct host1x_syncpt *sp; + struct host1x_syncpt *sp = NULL; struct host1x_job *job; unsigned int num_refs; int err; @@ -298,8 +298,8 @@ int tegra_drm_submit(struct tegra_drm_context *context, goto fail; }
- /* check whether syncpoint ID is valid */ - sp = host1x_syncpt_get(host1x, syncpt.id); + /* Syncpoint ref will be dropped on job release. */ + sp = host1x_syncpt_get_by_id(host1x, syncpt.id); if (!sp) { err = -ENOENT; goto fail; @@ -308,7 +308,7 @@ int tegra_drm_submit(struct tegra_drm_context *context, job->is_addr_reg = context->client->ops->is_addr_reg; job->is_valid_class = context->client->ops->is_valid_class; job->syncpt_incrs = syncpt.incrs; - job->syncpt_id = syncpt.id; + job->syncpt = sp; job->timeout = 10000;
if (args->timeout && args->timeout < 10000) @@ -380,7 +380,7 @@ static int tegra_syncpt_read(struct drm_device *drm, void *data, struct drm_tegra_syncpt_read *args = data; struct host1x_syncpt *sp;
- sp = host1x_syncpt_get(host, args->id); + sp = host1x_syncpt_get_by_id_noref(host, args->id); if (!sp) return -EINVAL;
@@ -395,7 +395,7 @@ static int tegra_syncpt_incr(struct drm_device *drm, void *data, struct drm_tegra_syncpt_incr *args = data; struct host1x_syncpt *sp;
- sp = host1x_syncpt_get(host1x, args->id); + sp = host1x_syncpt_get_by_id_noref(host1x, args->id); if (!sp) return -EINVAL;
@@ -409,7 +409,7 @@ static int tegra_syncpt_wait(struct drm_device *drm, void *data, struct drm_tegra_syncpt_wait *args = data; struct host1x_syncpt *sp;
- sp = host1x_syncpt_get(host1x, args->id); + sp = host1x_syncpt_get_by_id_noref(host1x, args->id); if (!sp) return -EINVAL;
diff --git a/drivers/gpu/drm/tegra/gr2d.c b/drivers/gpu/drm/tegra/gr2d.c index 1a0d3ba6e525..d857a99b21a7 100644 --- a/drivers/gpu/drm/tegra/gr2d.c +++ b/drivers/gpu/drm/tegra/gr2d.c @@ -67,7 +67,7 @@ static int gr2d_init(struct host1x_client *client) detach: host1x_client_iommu_detach(client); free: - host1x_syncpt_free(client->syncpts[0]); + host1x_syncpt_put(client->syncpts[0]); put: host1x_channel_put(gr2d->channel); return err; @@ -86,7 +86,7 @@ static int gr2d_exit(struct host1x_client *client) return err;
host1x_client_iommu_detach(client); - host1x_syncpt_free(client->syncpts[0]); + host1x_syncpt_put(client->syncpts[0]); host1x_channel_put(gr2d->channel);
return 0; diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c index b0b8154e8104..24442ade0da3 100644 --- a/drivers/gpu/drm/tegra/gr3d.c +++ b/drivers/gpu/drm/tegra/gr3d.c @@ -76,7 +76,7 @@ static int gr3d_init(struct host1x_client *client) detach: host1x_client_iommu_detach(client); free: - host1x_syncpt_free(client->syncpts[0]); + host1x_syncpt_put(client->syncpts[0]); put: host1x_channel_put(gr3d->channel); return err; @@ -94,7 +94,7 @@ static int gr3d_exit(struct host1x_client *client) return err;
host1x_client_iommu_detach(client); - host1x_syncpt_free(client->syncpts[0]); + host1x_syncpt_put(client->syncpts[0]); host1x_channel_put(gr3d->channel);
return 0; diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c index ade56b860cf9..cb476da59adc 100644 --- a/drivers/gpu/drm/tegra/vic.c +++ b/drivers/gpu/drm/tegra/vic.c @@ -197,7 +197,7 @@ static int vic_init(struct host1x_client *client) return 0;
free_syncpt: - host1x_syncpt_free(client->syncpts[0]); + host1x_syncpt_put(client->syncpts[0]); free_channel: host1x_channel_put(vic->channel); detach: @@ -221,7 +221,7 @@ static int vic_exit(struct host1x_client *client) if (err < 0) return err;
- host1x_syncpt_free(client->syncpts[0]); + host1x_syncpt_put(client->syncpts[0]); host1x_channel_put(vic->channel); host1x_client_iommu_detach(client);
diff --git a/drivers/gpu/host1x/cdma.c b/drivers/gpu/host1x/cdma.c index e8d3fda91d8a..6e6ca774f68d 100644 --- a/drivers/gpu/host1x/cdma.c +++ b/drivers/gpu/host1x/cdma.c @@ -273,15 +273,13 @@ static int host1x_cdma_wait_pushbuffer_space(struct host1x *host1x, static void cdma_start_timer_locked(struct host1x_cdma *cdma, struct host1x_job *job) { - struct host1x *host = cdma_to_host1x(cdma); - if (cdma->timeout.client) { /* timer already started */ return; }
cdma->timeout.client = job->client; - cdma->timeout.syncpt = host1x_syncpt_get(host, job->syncpt_id); + cdma->timeout.syncpt = job->syncpt; cdma->timeout.syncpt_val = job->syncpt_end; cdma->timeout.start_ktime = ktime_get();
@@ -312,7 +310,6 @@ static void stop_cdma_timer_locked(struct host1x_cdma *cdma) static void update_cdma_locked(struct host1x_cdma *cdma) { bool signal = false; - struct host1x *host1x = cdma_to_host1x(cdma); struct host1x_job *job, *n;
/* If CDMA is stopped, queue is cleared and we can return */ @@ -324,8 +321,7 @@ static void update_cdma_locked(struct host1x_cdma *cdma) * to consume as many sync queue entries as possible without blocking */ list_for_each_entry_safe(job, n, &cdma->sync_queue, list) { - struct host1x_syncpt *sp = - host1x_syncpt_get(host1x, job->syncpt_id); + struct host1x_syncpt *sp = job->syncpt;
/* Check whether this syncpt has completed, and bail if not */ if (!host1x_syncpt_is_expired(sp, job->syncpt_end)) { @@ -499,8 +495,7 @@ int host1x_cdma_begin(struct host1x_cdma *cdma, struct host1x_job *job) if (!cdma->timeout.initialized) { int err;
- err = host1x_hw_cdma_timeout_init(host1x, cdma, - job->syncpt_id); + err = host1x_hw_cdma_timeout_init(host1x, cdma); if (err) { mutex_unlock(&cdma->lock); return err; diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h index f781a9b0f39d..63010ae37a97 100644 --- a/drivers/gpu/host1x/dev.h +++ b/drivers/gpu/host1x/dev.h @@ -37,7 +37,7 @@ struct host1x_cdma_ops { void (*start)(struct host1x_cdma *cdma); void (*stop)(struct host1x_cdma *cdma); void (*flush)(struct host1x_cdma *cdma); - int (*timeout_init)(struct host1x_cdma *cdma, unsigned int syncpt); + int (*timeout_init)(struct host1x_cdma *cdma); void (*timeout_destroy)(struct host1x_cdma *cdma); void (*freeze)(struct host1x_cdma *cdma); void (*resume)(struct host1x_cdma *cdma, u32 getptr); @@ -261,10 +261,9 @@ static inline void host1x_hw_cdma_flush(struct host1x *host, }
static inline int host1x_hw_cdma_timeout_init(struct host1x *host, - struct host1x_cdma *cdma, - unsigned int syncpt) + struct host1x_cdma *cdma) { - return host->cdma_op->timeout_init(cdma, syncpt); + return host->cdma_op->timeout_init(cdma); }
static inline void host1x_hw_cdma_timeout_destroy(struct host1x *host, diff --git a/drivers/gpu/host1x/hw/cdma_hw.c b/drivers/gpu/host1x/hw/cdma_hw.c index 2f3bf94cf365..e49cd5b8f735 100644 --- a/drivers/gpu/host1x/hw/cdma_hw.c +++ b/drivers/gpu/host1x/hw/cdma_hw.c @@ -295,7 +295,7 @@ static void cdma_timeout_handler(struct work_struct *work) /* * Init timeout resources */ -static int cdma_timeout_init(struct host1x_cdma *cdma, unsigned int syncpt) +static int cdma_timeout_init(struct host1x_cdma *cdma) { INIT_DELAYED_WORK(&cdma->timeout.wq, cdma_timeout_handler); cdma->timeout.initialized = true; diff --git a/drivers/gpu/host1x/hw/channel_hw.c b/drivers/gpu/host1x/hw/channel_hw.c index 5eaa29d171c9..d4c28faf27d1 100644 --- a/drivers/gpu/host1x/hw/channel_hw.c +++ b/drivers/gpu/host1x/hw/channel_hw.c @@ -86,8 +86,7 @@ static void submit_gathers(struct host1x_job *job)
static inline void synchronize_syncpt_base(struct host1x_job *job) { - struct host1x *host = dev_get_drvdata(job->channel->dev->parent); - struct host1x_syncpt *sp = host->syncpt + job->syncpt_id; + struct host1x_syncpt *sp = job->syncpt; unsigned int id; u32 value;
@@ -118,7 +117,7 @@ static void host1x_channel_set_streamid(struct host1x_channel *channel) static int channel_submit(struct host1x_job *job) { struct host1x_channel *ch = job->channel; - struct host1x_syncpt *sp; + struct host1x_syncpt *sp = job->syncpt; u32 user_syncpt_incrs = job->syncpt_incrs; u32 prev_max = 0; u32 syncval; @@ -126,10 +125,9 @@ static int channel_submit(struct host1x_job *job) struct host1x_waitlist *completed_waiter = NULL; struct host1x *host = dev_get_drvdata(ch->dev->parent);
- sp = host->syncpt + job->syncpt_id; trace_host1x_channel_submit(dev_name(ch->dev), job->num_gathers, job->num_relocs, - job->syncpt_id, job->syncpt_incrs); + job->syncpt->id, job->syncpt_incrs);
/* before error checks, return current max */ prev_max = job->syncpt_end = host1x_syncpt_read_max(sp); @@ -163,7 +161,7 @@ static int channel_submit(struct host1x_job *job) host1x_cdma_push(&ch->cdma, host1x_opcode_setclass(HOST1X_CLASS_HOST1X, host1x_uclass_wait_syncpt_r(), 1), - host1x_class_host_wait_syncpt(job->syncpt_id, + host1x_class_host_wait_syncpt(job->syncpt->id, host1x_syncpt_read_max(sp))); }
diff --git a/drivers/gpu/host1x/hw/debug_hw.c b/drivers/gpu/host1x/hw/debug_hw.c index f31bcfa1b837..ceb48229d14b 100644 --- a/drivers/gpu/host1x/hw/debug_hw.c +++ b/drivers/gpu/host1x/hw/debug_hw.c @@ -204,7 +204,7 @@ static void show_channel_gathers(struct output *o, struct host1x_cdma *cdma) unsigned int i;
host1x_debug_output(o, "\n%p: JOB, syncpt_id=%d, syncpt_val=%d, first_get=%08x, timeout=%d num_slots=%d, num_handles=%d\n", - job, job->syncpt_id, job->syncpt_end, + job, job->syncpt->id, job->syncpt_end, job->first_get, job->timeout, job->num_slots, job->num_unpins);
diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c index 82d0a60ba3f7..adbdc225de8d 100644 --- a/drivers/gpu/host1x/job.c +++ b/drivers/gpu/host1x/job.c @@ -79,6 +79,9 @@ static void job_free(struct kref *ref) { struct host1x_job *job = container_of(ref, struct host1x_job, ref);
+ if (job->syncpt) + host1x_syncpt_put(job->syncpt); + kfree(job); }
@@ -674,7 +677,7 @@ EXPORT_SYMBOL(host1x_job_unpin); */ void host1x_job_dump(struct device *dev, struct host1x_job *job) { - dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt_id); + dev_dbg(dev, " SYNCPT_ID %d\n", job->syncpt->id); dev_dbg(dev, " SYNCPT_VAL %d\n", job->syncpt_end); dev_dbg(dev, " FIRST_GET 0x%x\n", job->first_get); dev_dbg(dev, " TIMEOUT %d\n", job->timeout); diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c index 9ccdf7709946..8a189a7c8d68 100644 --- a/drivers/gpu/host1x/syncpt.c +++ b/drivers/gpu/host1x/syncpt.c @@ -75,6 +75,8 @@ struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host, else sp->client_managed = false;
+ kref_init(&sp->ref); + mutex_unlock(&host->syncpt_mutex); return sp;
@@ -368,7 +370,7 @@ int host1x_syncpt_init(struct host1x *host) * host1x client drivers can use this function to allocate a syncpoint for * subsequent use. A syncpoint returned by this function will be reserved for * use by the client exclusively. When no longer using a syncpoint, a host1x - * client driver needs to release it using host1x_syncpt_free(). + * client driver needs to release it using host1x_syncpt_put(). */ struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client, unsigned long flags) @@ -379,20 +381,9 @@ struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client, } EXPORT_SYMBOL(host1x_syncpt_request);
-/** - * host1x_syncpt_free() - free a requested syncpoint - * @sp: host1x syncpoint - * - * Release a syncpoint previously allocated using host1x_syncpt_request(). A - * host1x client driver should call this when the syncpoint is no longer in - * use. Note that client drivers must ensure that the syncpoint doesn't remain - * under the control of hardware after calling this function, otherwise two - * clients may end up trying to access the same syncpoint concurrently. - */ -void host1x_syncpt_free(struct host1x_syncpt *sp) +static void syncpt_release(struct kref *ref) { - if (!sp) - return; + struct host1x_syncpt *sp = container_of(ref, struct host1x_syncpt, ref);
mutex_lock(&sp->host->syncpt_mutex);
@@ -404,7 +395,23 @@ void host1x_syncpt_free(struct host1x_syncpt *sp)
mutex_unlock(&sp->host->syncpt_mutex); } -EXPORT_SYMBOL(host1x_syncpt_free); + +/** + * host1x_syncpt_put() - free a requested syncpoint + * @sp: host1x syncpoint + * + * Release a syncpoint previously allocated using host1x_syncpt_request(). A + * host1x client driver should call this when the syncpoint is no longer in + * use. + */ +void host1x_syncpt_put(struct host1x_syncpt *sp) +{ + if (!sp) + return; + + kref_put(&sp->ref, syncpt_release); +} +EXPORT_SYMBOL(host1x_syncpt_put);
void host1x_syncpt_deinit(struct host1x *host) { @@ -471,16 +478,48 @@ unsigned int host1x_syncpt_nb_mlocks(struct host1x *host) }
/** - * host1x_syncpt_get() - obtain a syncpoint by ID + * host1x_syncpt_get_by_id() - obtain a syncpoint by ID + * @host: host1x controller + * @id: syncpoint ID + */ +struct host1x_syncpt *host1x_syncpt_get_by_id(struct host1x *host, + unsigned int id) +{ + if (id >= host->info->nb_pts) + return NULL; + + if (kref_get_unless_zero(&host->syncpt[id].ref)) + return &host->syncpt[id]; + else + return NULL; +} +EXPORT_SYMBOL(host1x_syncpt_get_by_id); + +/** + * host1x_syncpt_get_by_id_noref() - obtain a syncpoint by ID but don't + * increase the refcount. * @host: host1x controller * @id: syncpoint ID */ -struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, unsigned int id) +struct host1x_syncpt *host1x_syncpt_get_by_id_noref(struct host1x *host, + unsigned int id) { if (id >= host->info->nb_pts) return NULL;
- return host->syncpt + id; + return &host->syncpt[id]; +} +EXPORT_SYMBOL(host1x_syncpt_get_by_id_noref); + +/** + * host1x_syncpt_get() - increment syncpoint refcount + * @sp: syncpoint + */ +struct host1x_syncpt *host1x_syncpt_get(struct host1x_syncpt *sp) +{ + kref_get(&sp->ref); + + return sp; } EXPORT_SYMBOL(host1x_syncpt_get);
diff --git a/drivers/gpu/host1x/syncpt.h b/drivers/gpu/host1x/syncpt.h index 3aa6b25b1b9c..a6766f8d55ee 100644 --- a/drivers/gpu/host1x/syncpt.h +++ b/drivers/gpu/host1x/syncpt.h @@ -11,6 +11,7 @@ #include <linux/atomic.h> #include <linux/host1x.h> #include <linux/kernel.h> +#include <linux/kref.h> #include <linux/sched.h>
#include "intr.h" @@ -26,6 +27,8 @@ struct host1x_syncpt_base { };
struct host1x_syncpt { + struct kref ref; + unsigned int id; atomic_t min_val; atomic_t max_val; diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c index 70e1e18644b2..e14be37cdb01 100644 --- a/drivers/staging/media/tegra-video/vi.c +++ b/drivers/staging/media/tegra-video/vi.c @@ -1131,8 +1131,8 @@ static void tegra_channel_host1x_syncpts_free(struct tegra_vi_channel *chan) int i;
for (i = 0; i < chan->numgangports; i++) { - host1x_syncpt_free(chan->mw_ack_sp[i]); - host1x_syncpt_free(chan->frame_start_sp[i]); + host1x_syncpt_put(chan->mw_ack_sp[i]); + host1x_syncpt_put(chan->frame_start_sp[i]); } }
diff --git a/include/linux/host1x.h b/include/linux/host1x.h index 7137ce0e35d4..107aea29bccb 100644 --- a/include/linux/host1x.h +++ b/include/linux/host1x.h @@ -142,7 +142,9 @@ struct host1x_syncpt_base; struct host1x_syncpt; struct host1x;
-struct host1x_syncpt *host1x_syncpt_get(struct host1x *host, u32 id); +struct host1x_syncpt *host1x_syncpt_get_by_id(struct host1x *host, u32 id); +struct host1x_syncpt *host1x_syncpt_get_by_id_noref(struct host1x *host, u32 id); +struct host1x_syncpt *host1x_syncpt_get(struct host1x_syncpt *sp); u32 host1x_syncpt_id(struct host1x_syncpt *sp); u32 host1x_syncpt_read_min(struct host1x_syncpt *sp); u32 host1x_syncpt_read_max(struct host1x_syncpt *sp); @@ -153,7 +155,7 @@ int host1x_syncpt_wait(struct host1x_syncpt *sp, u32 thresh, long timeout, u32 *value); struct host1x_syncpt *host1x_syncpt_request(struct host1x_client *client, unsigned long flags); -void host1x_syncpt_free(struct host1x_syncpt *sp); +void host1x_syncpt_put(struct host1x_syncpt *sp); struct host1x_syncpt *host1x_syncpt_alloc(struct host1x *host, unsigned long flags, const char *name); @@ -221,7 +223,7 @@ struct host1x_job { dma_addr_t *reloc_addr_phys;
/* Sync point id, number of increments and end related to the submit */ - u32 syncpt_id; + struct host1x_syncpt *syncpt; u32 syncpt_incrs; u32 syncpt_end;