On 17.05.2018 18:34, Thierry Reding wrote:
> From: Thierry Reding <treding@xxxxxxxxxx>
>
> The job submission userspace ABI doesn't support this and there are no
> plans to implement it, so all of this code is dead and can be removed.
>
> Signed-off-by: Thierry Reding <treding@xxxxxxxxxx>
> ---
> drivers/gpu/drm/tegra/drm.c | 62 +--------------
> drivers/gpu/host1x/dev.h | 8 --
> drivers/gpu/host1x/hw/channel_hw.c | 3 +-
> drivers/gpu/host1x/hw/syncpt_hw.c | 11 ---
> drivers/gpu/host1x/job.c | 124 +----------------------------
> drivers/gpu/host1x/syncpt.c | 6 --
> drivers/gpu/host1x/syncpt.h | 3 -
> include/linux/host1x.h | 15 +---
> include/trace/events/host1x.h | 16 ++--
> 9 files changed, 14 insertions(+), 234 deletions(-)
>
> diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
> index 7afe2f635f74..33e479182773 100644
> --- a/drivers/gpu/drm/tegra/drm.c
> +++ b/drivers/gpu/drm/tegra/drm.c
> @@ -313,46 +313,14 @@ static int host1x_reloc_copy_from_user(struct host1x_reloc *dest,
> return 0;
> }
>
> -static int host1x_waitchk_copy_from_user(struct host1x_waitchk *dest,
> - struct drm_tegra_waitchk __user *src,
> - struct drm_file *file)
> -{
> - u32 cmdbuf;
> - int err;
> -
> - err = get_user(cmdbuf, &src->handle);
> - if (err < 0)
> - return err;
> -
> - err = get_user(dest->offset, &src->offset);
> - if (err < 0)
> - return err;
> -
> - err = get_user(dest->syncpt_id, &src->syncpt);
> - if (err < 0)
> - return err;
> -
> - err = get_user(dest->thresh, &src->thresh);
> - if (err < 0)
> - return err;
> -
> - dest->bo = host1x_bo_lookup(file, cmdbuf);
> - if (!dest->bo)
> - return -ENOENT;
> -
> - return 0;
> -}
> -
> int tegra_drm_submit(struct tegra_drm_context *context,
> struct drm_tegra_submit *args, struct drm_device *drm,
> struct drm_file *file)
> {
> unsigned int num_cmdbufs = args->num_cmdbufs;
> unsigned int num_relocs = args->num_relocs;
> - unsigned int num_waitchks = args->num_waitchks;
> struct drm_tegra_cmdbuf __user *user_cmdbufs;
> struct drm_tegra_reloc __user *user_relocs;
> - struct drm_tegra_waitchk __user *user_waitchks;
> struct drm_tegra_syncpt __user *user_syncpt;
> struct drm_tegra_syncpt syncpt;
> struct host1x *host1x = dev_get_drvdata(drm->dev->parent);
> @@ -364,7 +332,6 @@ int tegra_drm_submit(struct tegra_drm_context *context,
>
> user_cmdbufs = u64_to_user_ptr(args->cmdbufs);
> user_relocs = u64_to_user_ptr(args->relocs);
> - user_waitchks = u64_to_user_ptr(args->waitchks);
> user_syncpt = u64_to_user_ptr(args->syncpts);
>
> /* We don't yet support other than one syncpt_incr struct per submit */
> @@ -376,12 +343,11 @@ int tegra_drm_submit(struct tegra_drm_context *context,
> return -EINVAL;
>
> job = host1x_job_alloc(context->channel, args->num_cmdbufs,
> - args->num_relocs, args->num_waitchks);
> + args->num_relocs);
> if (!job)
> return -ENOMEM;
>
> job->num_relocs = args->num_relocs;
> - job->num_waitchk = args->num_waitchks;
> job->client = (u32)args->context;
> job->class = context->client->base.class;
> job->serialize = true;
> @@ -390,7 +356,7 @@ int tegra_drm_submit(struct tegra_drm_context *context,
> * Track referenced BOs so that they can be unreferenced after the
> * submission is complete.
> */
> - num_refs = num_cmdbufs + num_relocs * 2 + num_waitchks;
> + num_refs = num_cmdbufs + num_relocs * 2;
>
> refs = kmalloc_array(num_refs, sizeof(*refs), GFP_KERNEL);
> if (!refs) {
> @@ -481,30 +447,6 @@ int tegra_drm_submit(struct tegra_drm_context *context,
> }
> }
>
> - /* copy and resolve waitchks from submit */
> - while (num_waitchks--) {
> - struct host1x_waitchk *wait = &job->waitchk[num_waitchks];
> - struct tegra_bo *obj;
> -
> - err = host1x_waitchk_copy_from_user(
> - wait, &user_waitchks[num_waitchks], file);
> - if (err < 0)
> - goto fail;
> -
> - obj = host1x_to_tegra_bo(wait->bo);
> - refs[num_refs++] = &obj->gem;
> -
> - /*
> - * The unaligned offset will cause an unaligned write during
> - * of the waitchks patching, corrupting the commands stream.
> - */
> - if (wait->offset & 3 ||
> - wait->offset >= obj->gem.size) {
> - err = -EINVAL;
> - goto fail;
> - }
> - }
> -
> if (copy_from_user(&syncpt, user_syncpt, sizeof(syncpt))) {
> err = -EFAULT;
> goto fail;
> diff --git a/drivers/gpu/host1x/dev.h b/drivers/gpu/host1x/dev.h
> index 43e9fabb43a1..36f44ffebe73 100644
> --- a/drivers/gpu/host1x/dev.h
> +++ b/drivers/gpu/host1x/dev.h
> @@ -78,7 +78,6 @@ struct host1x_syncpt_ops {
> void (*load_wait_base)(struct host1x_syncpt *syncpt);
> u32 (*load)(struct host1x_syncpt *syncpt);
> int (*cpu_incr)(struct host1x_syncpt *syncpt);
> - int (*patch_wait)(struct host1x_syncpt *syncpt, void *patch_addr);
> void (*assign_to_channel)(struct host1x_syncpt *syncpt,
> struct host1x_channel *channel);
> void (*enable_protection)(struct host1x *host);
> @@ -183,13 +182,6 @@ static inline int host1x_hw_syncpt_cpu_incr(struct host1x *host,
> return host->syncpt_op->cpu_incr(sp);
> }
>
> -static inline int host1x_hw_syncpt_patch_wait(struct host1x *host,
> - struct host1x_syncpt *sp,
> - void *patch_addr)
> -{
> - return host->syncpt_op->patch_wait(sp, patch_addr);
> -}
> -
> static inline void host1x_hw_syncpt_assign_to_channel(
> struct host1x *host, struct host1x_syncpt *sp,
> struct host1x_channel *ch)
> diff --git a/drivers/gpu/host1x/hw/channel_hw.c b/drivers/gpu/host1x/hw/channel_hw.c
> index 9af758785a11..4c9555038a95 100644
> --- a/drivers/gpu/host1x/hw/channel_hw.c
> +++ b/drivers/gpu/host1x/hw/channel_hw.c
> @@ -104,8 +104,7 @@ static int channel_submit(struct host1x_job *job)
> sp = host->syncpt + job->syncpt_id;
> trace_host1x_channel_submit(dev_name(ch->dev),
> job->num_gathers, job->num_relocs,
> - job->num_waitchk, 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);
> diff --git a/drivers/gpu/host1x/hw/syncpt_hw.c b/drivers/gpu/host1x/hw/syncpt_hw.c
> index 7dfd47d74f89..a23bb3352d02 100644
> --- a/drivers/gpu/host1x/hw/syncpt_hw.c
> +++ b/drivers/gpu/host1x/hw/syncpt_hw.c
> @@ -96,16 +96,6 @@ static int syncpt_cpu_incr(struct host1x_syncpt *sp)
> return 0;
> }
>
> -/* remove a wait pointed to by patch_addr */
> -static int syncpt_patch_wait(struct host1x_syncpt *sp, void *patch_addr)
> -{
> - u32 override = host1x_class_host_wait_syncpt(HOST1X_SYNCPT_RESERVED, 0);
> -
> - *((u32 *)patch_addr) = override;
> -
> - return 0;
> -}
> -
> /**
> * syncpt_assign_to_channel() - Assign syncpoint to channel
> * @sp: syncpoint
> @@ -156,7 +146,6 @@ static const struct host1x_syncpt_ops host1x_syncpt_ops = {
> .load_wait_base = syncpt_read_wait_base,
> .load = syncpt_load,
> .cpu_incr = syncpt_cpu_incr,
> - .patch_wait = syncpt_patch_wait,
> .assign_to_channel = syncpt_assign_to_channel,
> .enable_protection = syncpt_enable_protection,
> };
> diff --git a/drivers/gpu/host1x/job.c b/drivers/gpu/host1x/job.c
> index db509ab8874e..3cbfc6e37668 100644
> --- a/drivers/gpu/host1x/job.c
> +++ b/drivers/gpu/host1x/job.c
> @@ -34,8 +34,7 @@
> #define HOST1X_WAIT_SYNCPT_OFFSET 0x8
>
> struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
> - u32 num_cmdbufs, u32 num_relocs,
> - u32 num_waitchks)
> + u32 num_cmdbufs, u32 num_relocs)
> {
> struct host1x_job *job = NULL;
> unsigned int num_unpins = num_cmdbufs + num_relocs;
> @@ -46,7 +45,6 @@ struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
> total = sizeof(struct host1x_job) +
> (u64)num_relocs * sizeof(struct host1x_reloc) +
> (u64)num_unpins * sizeof(struct host1x_job_unpin_data) +
> - (u64)num_waitchks * sizeof(struct host1x_waitchk) +
> (u64)num_cmdbufs * sizeof(struct host1x_job_gather) +
> (u64)num_unpins * sizeof(dma_addr_t) +
> (u64)num_unpins * sizeof(u32 *);
> @@ -66,8 +64,6 @@ struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
> mem += num_relocs * sizeof(struct host1x_reloc);
> job->unpins = num_unpins ? mem : NULL;
> mem += num_unpins * sizeof(struct host1x_job_unpin_data);
> - job->waitchk = num_waitchks ? mem : NULL;
> - mem += num_waitchks * sizeof(struct host1x_waitchk);
> job->gathers = num_cmdbufs ? mem : NULL;
> mem += num_cmdbufs * sizeof(struct host1x_job_gather);
> job->addr_phys = num_unpins ? mem : NULL;
> @@ -111,73 +107,6 @@ void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *bo,
> }
> EXPORT_SYMBOL(host1x_job_add_gather);
>
> -/*
> - * NULL an already satisfied WAIT_SYNCPT host method, by patching its
> - * args in the command stream. The method data is changed to reference
> - * a reserved (never given out or incr) HOST1X_SYNCPT_RESERVED syncpt
> - * with a matching threshold value of 0, so is guaranteed to be popped
> - * by the host HW.
> - */
> -static void host1x_syncpt_patch_offset(struct host1x_syncpt *sp,
> - struct host1x_bo *h, u32 offset)
> -{
> - void *patch_addr = NULL;
> -
> - /* patch the wait */
> - patch_addr = host1x_bo_kmap(h, offset >> PAGE_SHIFT);
> - if (patch_addr) {
> - host1x_syncpt_patch_wait(sp,
> - patch_addr + (offset & ~PAGE_MASK));
> - host1x_bo_kunmap(h, offset >> PAGE_SHIFT, patch_addr);
> - } else
> - pr_err("Could not map cmdbuf for wait check\n");
> -}
> -
> -/*
> - * Check driver supplied waitchk structs for syncpt thresholds
> - * that have already been satisfied and NULL the comparison (to
> - * avoid a wrap condition in the HW).
> - */
> -static int do_waitchks(struct host1x_job *job, struct host1x *host,
> - struct host1x_job_gather *g)
> -{
> - struct host1x_bo *patch = g->bo;
> - int i;
> -
> - /* compare syncpt vs wait threshold */
> - for (i = 0; i < job->num_waitchk; i++) {
> - struct host1x_waitchk *wait = &job->waitchk[i];
> - struct host1x_syncpt *sp =
> - host1x_syncpt_get(host, wait->syncpt_id);
> -
> - /* validate syncpt id */
> - if (wait->syncpt_id > host1x_syncpt_nb_pts(host))
> - continue;
> -
> - /* skip all other gathers */
> - if (patch != wait->bo)
> - continue;
> -
> - trace_host1x_syncpt_wait_check(wait->bo, wait->offset,
> - wait->syncpt_id, wait->thresh,
> - host1x_syncpt_read_min(sp));
> -
> - if (host1x_syncpt_is_expired(sp, wait->thresh)) {
> - dev_dbg(host->dev,
> - "drop WAIT id %u (%s) thresh 0x%x, min 0x%x\n",
> - wait->syncpt_id, sp->name, wait->thresh,
> - host1x_syncpt_read_min(sp));
> -
> - host1x_syncpt_patch_offset(sp, patch,
> - g->offset + wait->offset);
> - }
> -
> - wait->bo = NULL;
> - }
> -
> - return 0;
> -}
> -
> static unsigned int pin_job(struct host1x *host, struct host1x_job *job)
> {
> unsigned int i;
> @@ -331,17 +260,6 @@ static bool check_reloc(struct host1x_reloc *reloc, struct host1x_bo *cmdbuf,
> return true;
> }
>
> -static bool check_wait(struct host1x_waitchk *wait, struct host1x_bo *cmdbuf,
> - unsigned int offset)
> -{
> - offset *= sizeof(u32);
> -
> - if (wait->bo != cmdbuf || wait->offset != offset)
> - return false;
> -
> - return true;
> -}
> -
> struct host1x_firewall {
> struct host1x_job *job;
> struct device *dev;
> @@ -349,9 +267,6 @@ struct host1x_firewall {
> unsigned int num_relocs;
> struct host1x_reloc *reloc;
>
> - unsigned int num_waitchks;
> - struct host1x_waitchk *waitchk;
> -
> struct host1x_bo *cmdbuf;
> unsigned int offset;
>
> @@ -378,20 +293,6 @@ static int check_register(struct host1x_firewall *fw, unsigned long offset)
> fw->reloc++;
> }
>
> - if (offset == HOST1X_WAIT_SYNCPT_OFFSET) {
> - if (fw->class != HOST1X_CLASS_HOST1X)
> - return -EINVAL;
> -
> - if (!fw->num_waitchks)
> - return -EINVAL;
> -
> - if (!check_wait(fw->waitchk, fw->cmdbuf, fw->offset))
> - return -EINVAL;
> -
> - fw->num_waitchks--;
> - fw->waitchk++;
> - }
> -
> return 0;
> }
>
> @@ -556,8 +457,6 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev)
> fw.dev = dev;
> fw.reloc = job->relocarray;
> fw.num_relocs = job->num_relocs;
> - fw.waitchk = job->waitchk;
> - fw.num_waitchks = job->num_waitchk;
> fw.class = job->class;
>
> for (i = 0; i < job->num_gathers; i++) {
> @@ -604,8 +503,8 @@ static inline int copy_gathers(struct host1x_job *job, struct device *dev)
> offset += g->words * sizeof(u32);
> }
>
> - /* No relocs and waitchks should remain at this point */
> - if (fw.num_relocs || fw.num_waitchks)
> + /* No relocs should remain at this point */
> + if (fw.num_relocs)
> return -EINVAL;
>
> return 0;
> @@ -616,19 +515,6 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
> int err;
> unsigned int i, j;
> struct host1x *host = dev_get_drvdata(dev->parent);
> - DECLARE_BITMAP(waitchk_mask, host1x_syncpt_nb_pts(host));
> -
> - bitmap_zero(waitchk_mask, host1x_syncpt_nb_pts(host));
> - for (i = 0; i < job->num_waitchk; i++) {
> - u32 syncpt_id = job->waitchk[i].syncpt_id;
> -
> - if (syncpt_id < host1x_syncpt_nb_pts(host))
> - set_bit(syncpt_id, waitchk_mask);
> - }
> -
> - /* get current syncpt values for waitchk */
> - for_each_set_bit(i, waitchk_mask, host1x_syncpt_nb_pts(host))
> - host1x_syncpt_load(host->syncpt + i);
>
> /* pin memory */
> err = pin_job(host, job);
> @@ -663,10 +549,6 @@ int host1x_job_pin(struct host1x_job *job, struct device *dev)
> err = do_relocs(job, g);
> if (err)
> break;
> -
> - err = do_waitchks(job, host, g);
> - if (err)
> - break;
> }
>
> out:
> diff --git a/drivers/gpu/host1x/syncpt.c b/drivers/gpu/host1x/syncpt.c
> index a2a952adc136..a108669188e8 100644
> --- a/drivers/gpu/host1x/syncpt.c
> +++ b/drivers/gpu/host1x/syncpt.c
> @@ -373,12 +373,6 @@ bool host1x_syncpt_is_expired(struct host1x_syncpt *sp, u32 thresh)
> return (s32)(current_val - thresh) >= 0;
> }
>
> -/* remove a wait pointed to by patch_addr */
> -int host1x_syncpt_patch_wait(struct host1x_syncpt *sp, void *patch_addr)
> -{
> - return host1x_hw_syncpt_patch_wait(sp->host, sp, patch_addr);
> -}
> -
> int host1x_syncpt_init(struct host1x *host)
> {
> struct host1x_syncpt_base *bases;
> diff --git a/drivers/gpu/host1x/syncpt.h b/drivers/gpu/host1x/syncpt.h
> index 9d88d37c2397..d98e22325e9d 100644
> --- a/drivers/gpu/host1x/syncpt.h
> +++ b/drivers/gpu/host1x/syncpt.h
> @@ -124,7 +124,4 @@ static inline int host1x_syncpt_is_valid(struct host1x_syncpt *sp)
> return sp->id < host1x_syncpt_nb_pts(sp->host);
> }
>
> -/* Patch a wait by replacing it with a wait for syncpt 0 value 0 */
> -int host1x_syncpt_patch_wait(struct host1x_syncpt *sp, void *patch_addr);
> -
> #endif
> diff --git a/include/linux/host1x.h b/include/linux/host1x.h
> index ddf7f9ca86cc..f66bece1e1b7 100644
> --- a/include/linux/host1x.h
> +++ b/include/linux/host1x.h
> @@ -192,13 +192,6 @@ struct host1x_reloc {
> unsigned long shift;
> };
>
> -struct host1x_waitchk {
> - struct host1x_bo *bo;
> - u32 offset;
> - u32 syncpt_id;
> - u32 thresh;
> -};
> -
> struct host1x_job {
> /* When refcount goes to zero, job can be freed */
> struct kref ref;
> @@ -215,11 +208,6 @@ struct host1x_job {
> struct host1x_job_gather *gathers;
> unsigned int num_gathers;
>
> - /* Wait checks to be processed at submit time */
> - struct host1x_waitchk *waitchk;
> - unsigned int num_waitchk;
> - u32 waitchk_mask;
> -
> /* Array of handles to be pinned & unpinned */
> struct host1x_reloc *relocarray;
> unsigned int num_relocs;
> @@ -261,8 +249,7 @@ struct host1x_job {
> };
>
> struct host1x_job *host1x_job_alloc(struct host1x_channel *ch,
> - u32 num_cmdbufs, u32 num_relocs,
> - u32 num_waitchks);
> + u32 num_cmdbufs, u32 num_relocs);
> void host1x_job_add_gather(struct host1x_job *job, struct host1x_bo *mem_id,
> u32 words, u32 offset);
> struct host1x_job *host1x_job_get(struct host1x_job *job);
> diff --git a/include/trace/events/host1x.h b/include/trace/events/host1x.h
> index 63116362543c..a37ef73092e5 100644
> --- a/include/trace/events/host1x.h
> +++ b/include/trace/events/host1x.h
> @@ -115,16 +115,15 @@ TRACE_EVENT(host1x_cdma_push_gather,
> );
>
> TRACE_EVENT(host1x_channel_submit,
> - TP_PROTO(const char *name, u32 cmdbufs, u32 relocs, u32 waitchks,
> - u32 syncpt_id, u32 syncpt_incrs),
> + TP_PROTO(const char *name, u32 cmdbufs, u32 relocs, u32 syncpt_id,
> + u32 syncpt_incrs),
>
> - TP_ARGS(name, cmdbufs, relocs, waitchks, syncpt_id, syncpt_incrs),
> + TP_ARGS(name, cmdbufs, relocs, syncpt_id, syncpt_incrs),
>
> TP_STRUCT__entry(
> __field(const char *, name)
> __field(u32, cmdbufs)
> __field(u32, relocs)
> - __field(u32, waitchks)
> __field(u32, syncpt_id)
> __field(u32, syncpt_incrs)
> ),
> @@ -133,15 +132,14 @@ TRACE_EVENT(host1x_channel_submit,
> __entry->name = name;
> __entry->cmdbufs = cmdbufs;
> __entry->relocs = relocs;
> - __entry->waitchks = waitchks;
> __entry->syncpt_id = syncpt_id;
> __entry->syncpt_incrs = syncpt_incrs;
> ),
>
> - TP_printk("name=%s, cmdbufs=%u, relocs=%u, waitchks=%d,"
> - "syncpt_id=%u, syncpt_incrs=%u",
> - __entry->name, __entry->cmdbufs, __entry->relocs, __entry->waitchks,
> - __entry->syncpt_id, __entry->syncpt_incrs)
> + TP_printk("name=%s, cmdbufs=%u, relocs=%u, syncpt_id=%u, "
> + "syncpt_incrs=%u",
> + __entry->name, __entry->cmdbufs, __entry->relocs,
> + __entry->syncpt_id, __entry->syncpt_incrs)
> );
>
> TRACE_EVENT(host1x_channel_submitted,
>
Reviewed-by: Dmitry Osipenko <digetx@xxxxxxxxx>
Tested-by: Dmitry Osipenko <digetx@xxxxxxxxx>
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