Hi Boris, thanks for the remarks,
On 04.09.2024 09:49, Boris Brezillon wrote:
> On Tue, 3 Sep 2024 21:25:35 +0100
> Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx> wrote:
>
> > Enable calculations of job submission times in clock cycles and wall
> > time. This is done by expanding the boilerplate command stream when running
> > a job to include instructions that compute said times right before an after
> > a user CS.
> >
> > A separate kernel BO is created per queue to store those values. Jobs can
> > access their sampled data through a slots buffer-specific index different
> > from that of the queue's ringbuffer. The reason for this is saving memory
> > on the profiling information kernel BO, since the amount of simultaneous
> > profiled jobs we can write into the queue's ringbuffer might be much
> > smaller than for regular jobs, as the former take more CSF instructions.
> >
> > This commit is done in preparation for enabling DRM fdinfo support in the
> > Panthor driver, which depends on the numbers calculated herein.
> >
> > A profile mode mask has been added that will in a future commit allow UM to
> > toggle performance metric sampling behaviour, which is disabled by default
> > to save power. When a ringbuffer CS is constructed, timestamp and cycling
> > sampling instructions are added depending on the enabled flags in the
> > profiling mask.
> >
> > A helper was provided that calculates the number of instructions for a
> > given set of enablement mask, and these are passed as the number of credits
> > when initialising a DRM scheduler job.
> >
> > Signed-off-by: Adrián Larumbe <adrian.larumbe@xxxxxxxxxxxxx>
> > ---
> > drivers/gpu/drm/panthor/panthor_device.h | 22 ++
> > drivers/gpu/drm/panthor/panthor_sched.c | 327 ++++++++++++++++++++---
> > 2 files changed, 305 insertions(+), 44 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/panthor/panthor_device.h b/drivers/gpu/drm/panthor/panthor_device.h
> > index e388c0472ba7..a48e30d0af30 100644
> > --- a/drivers/gpu/drm/panthor/panthor_device.h
> > +++ b/drivers/gpu/drm/panthor/panthor_device.h
> > @@ -66,6 +66,25 @@ struct panthor_irq {
> > atomic_t suspended;
> > };
> >
> > +/**
> > + * enum panthor_device_profiling_mode - Profiling state
> > + */
> > +enum panthor_device_profiling_flags {
> > + /** @PANTHOR_DEVICE_PROFILING_DISABLED: Profiling is disabled. */
> > + PANTHOR_DEVICE_PROFILING_DISABLED = 0,
> > +
> > + /** @PANTHOR_DEVICE_PROFILING_CYCLES: Sampling job cycles. */
> > + PANTHOR_DEVICE_PROFILING_CYCLES = BIT(0),
> > +
> > + /** @PANTHOR_DEVICE_PROFILING_TIMESTAMP: Sampling job timestamp. */
> > + PANTHOR_DEVICE_PROFILING_TIMESTAMP = BIT(1),
> > +
> > + /** @PANTHOR_DEVICE_PROFILING_ALL: Sampling everything. */
> > + PANTHOR_DEVICE_PROFILING_ALL =
> > + PANTHOR_DEVICE_PROFILING_CYCLES |
> > + PANTHOR_DEVICE_PROFILING_TIMESTAMP,
> > +};
> > +
> > /**
> > * struct panthor_device - Panthor device
> > */
> > @@ -162,6 +181,9 @@ struct panthor_device {
> > */
> > struct page *dummy_latest_flush;
> > } pm;
> > +
> > + /** @profile_mask: User-set profiling flags for job accounting. */
> > + u32 profile_mask;
> > };
> >
> > /**
> > diff --git a/drivers/gpu/drm/panthor/panthor_sched.c b/drivers/gpu/drm/panthor/panthor_sched.c
> > index c426a392b081..b087648bf59a 100644
> > --- a/drivers/gpu/drm/panthor/panthor_sched.c
> > +++ b/drivers/gpu/drm/panthor/panthor_sched.c
> > @@ -93,6 +93,9 @@
> > #define MIN_CSGS 3
> > #define MAX_CSG_PRIO 0xf
> >
> > +#define NUM_INSTRS_PER_CACHE_LINE (64 / sizeof(u64))
> > +#define MAX_INSTRS_PER_JOB 32
> > +
> > struct panthor_group;
> >
> > /**
> > @@ -476,6 +479,18 @@ struct panthor_queue {
> > */
> > struct list_head in_flight_jobs;
> > } fence_ctx;
> > +
> > + /** @profiling_info: Job profiling data slots and access information. */
> > + struct {
> > + /** @slots: Kernel BO holding the slots. */
> > + struct panthor_kernel_bo *slots;
> > +
> > + /** @slot_count: Number of jobs ringbuffer can hold at once. */
> > + u32 slot_count;
> > +
> > + /** @profiling_seqno: Index of the next available profiling information slot. */
> > + u32 profiling_seqno;
>
> Nit: no need to repeat profiling as it's under the profiling_info
> struct. I would simply name that one 'seqno'.
>
> > + } profiling_info;
>
> s/profiling_info/profiling/ ?
>
> > };
> >
> > /**
> > @@ -661,6 +676,18 @@ struct panthor_group {
> > struct list_head wait_node;
> > };
> >
> > +struct panthor_job_profiling_data {
> > + struct {
> > + u64 before;
> > + u64 after;
> > + } cycles;
> > +
> > + struct {
> > + u64 before;
> > + u64 after;
> > + } time;
> > +};
> > +
> > /**
> > * group_queue_work() - Queue a group work
> > * @group: Group to queue the work for.
> > @@ -774,6 +801,12 @@ struct panthor_job {
> >
> > /** @done_fence: Fence signaled when the job is finished or cancelled. */
> > struct dma_fence *done_fence;
> > +
> > + /** @profile_mask: Current device job profiling enablement bitmask. */
> > + u32 profile_mask;
> > +
> > + /** @profile_slot: Job profiling information index in the profiling slots BO. */
> > + u32 profiling_slot;
>
> Nit: we tend to group fields together under sub-structs, so I'd say:
>
> struct {
> u32 mask; // or flags
> u32 slot;
> } profiling;
>
> > };
> >
> > static void
> > @@ -838,6 +871,7 @@ static void group_free_queue(struct panthor_group *group, struct panthor_queue *
> >
> > panthor_kernel_bo_destroy(queue->ringbuf);
> > panthor_kernel_bo_destroy(queue->iface.mem);
> > + panthor_kernel_bo_destroy(queue->profiling_info.slots);
> >
> > /* Release the last_fence we were holding, if any. */
> > dma_fence_put(queue->fence_ctx.last_fence);
> > @@ -1982,8 +2016,6 @@ tick_ctx_init(struct panthor_scheduler *sched,
> > }
> > }
> >
> > -#define NUM_INSTRS_PER_SLOT 16
> > -
> > static void
> > group_term_post_processing(struct panthor_group *group)
> > {
> > @@ -2815,65 +2847,211 @@ static void group_sync_upd_work(struct work_struct *work)
> > group_put(group);
> > }
> >
> > -static struct dma_fence *
> > -queue_run_job(struct drm_sched_job *sched_job)
> > +struct panthor_job_ringbuf_instrs {
> > + u64 buffer[MAX_INSTRS_PER_JOB];
> > + u32 count;
> > +};
> > +
> > +struct panthor_job_instr {
> > + u32 profile_mask;
> > + u64 instr;
> > +};
> > +
> > +#define JOB_INSTR(__prof, __instr) \
> > + { \
> > + .profile_mask = __prof, \
> > + .instr = __instr, \
> > + }
> > +
> > +static void
> > +copy_instrs_to_ringbuf(struct panthor_queue *queue,
> > + struct panthor_job *job,
> > + struct panthor_job_ringbuf_instrs *instrs)
> > +{
> > + ssize_t ringbuf_size = panthor_kernel_bo_size(queue->ringbuf);
> > + u32 start = job->ringbuf.start & (ringbuf_size - 1);
> > + ssize_t size, written;
> > +
> > + /*
> > + * We need to write a whole slot, including any trailing zeroes
> > + * that may come at the end of it. Also, because instrs.buffer had
> > + * been zero-initialised, there's no need to pad it with 0's
> > + */
> > + instrs->count = ALIGN(instrs->count, NUM_INSTRS_PER_CACHE_LINE);
> > + size = instrs->count * sizeof(u64);
> > + written = min(ringbuf_size - start, size);
> > +
> > + memcpy(queue->ringbuf->kmap + start, instrs->buffer, written);
> > +
> > + if (written < size)
> > + memcpy(queue->ringbuf->kmap,
> > + &instrs->buffer[(ringbuf_size - start)/sizeof(u64)],
> > + size - written);
> > +}
> > +
> > +struct panthor_job_cs_params {
> > + u32 profile_mask;
> > + u64 addr_reg; u64 val_reg;
> > + u64 cycle_reg; u64 time_reg;
> > + u64 sync_addr; u64 times_addr;
> > + u64 cs_start; u64 cs_size;
> > + u32 last_flush; u32 waitall_mask;
> > +};
> > +
> > +static void
> > +get_job_cs_params(struct panthor_job *job, struct panthor_job_cs_params *params)
> > {
> > - struct panthor_job *job = container_of(sched_job, struct panthor_job, base);
> > struct panthor_group *group = job->group;
> > struct panthor_queue *queue = group->queues[job->queue_idx];
> > struct panthor_device *ptdev = group->ptdev;
> > struct panthor_scheduler *sched = ptdev->scheduler;
> > - u32 ringbuf_size = panthor_kernel_bo_size(queue->ringbuf);
> > - u32 ringbuf_insert = queue->iface.input->insert & (ringbuf_size - 1);
> > - u64 addr_reg = ptdev->csif_info.cs_reg_count -
> > - ptdev->csif_info.unpreserved_cs_reg_count;
> > - u64 val_reg = addr_reg + 2;
> > - u64 sync_addr = panthor_kernel_bo_gpuva(group->syncobjs) +
> > - job->queue_idx * sizeof(struct panthor_syncobj_64b);
> > - u32 waitall_mask = GENMASK(sched->sb_slot_count - 1, 0);
> > - struct dma_fence *done_fence;
> > - int ret;
> >
> > - u64 call_instrs[NUM_INSTRS_PER_SLOT] = {
> > + params->addr_reg = ptdev->csif_info.cs_reg_count -
> > + ptdev->csif_info.unpreserved_cs_reg_count;
> > + params->val_reg = params->addr_reg + 2;
> > + params->cycle_reg = params->addr_reg;
> > + params->time_reg = params->val_reg;
> > +
> > + params->sync_addr = panthor_kernel_bo_gpuva(group->syncobjs) +
> > + job->queue_idx * sizeof(struct panthor_syncobj_64b);
> > + params->times_addr = panthor_kernel_bo_gpuva(queue->profiling_info.slots) +
> > + (job->profiling_slot * sizeof(struct panthor_job_profiling_data));
> > + params->waitall_mask = GENMASK(sched->sb_slot_count - 1, 0);
> > +
> > + params->cs_start = job->call_info.start;
> > + params->cs_size = job->call_info.size;
> > + params->last_flush = job->call_info.latest_flush;
> > +
> > + params->profile_mask = job->profile_mask;
> > +}
> > +
> > +static void
> > +prepare_job_instrs(const struct panthor_job_cs_params *params,
> > + struct panthor_job_ringbuf_instrs *instrs)
> > +{
> > + const struct panthor_job_instr instr_seq[] = {
> > /* MOV32 rX+2, cs.latest_flush */
> > - (2ull << 56) | (val_reg << 48) | job->call_info.latest_flush,
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (2ull << 56) | (params->val_reg << 48) | params->last_flush),
> >
> > /* FLUSH_CACHE2.clean_inv_all.no_wait.signal(0) rX+2 */
> > - (36ull << 56) | (0ull << 48) | (val_reg << 40) | (0 << 16) | 0x233,
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (36ull << 56) | (0ull << 48) | (params->val_reg << 40) | (0 << 16) | 0x233),
> > +
> > + /* MOV48 rX:rX+1, cycles_offset */
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_CYCLES,
> > + (1ull << 56) | (params->cycle_reg << 48) |
> > + (params->times_addr +
> > + offsetof(struct panthor_job_profiling_data, cycles.before))),
> > + /* STORE_STATE cycles */
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_CYCLES,
> > + (40ull << 56) | (params->cycle_reg << 40) | (1ll << 32)),
> > + /* MOV48 rX:rX+1, time_offset */
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_TIMESTAMP,
> > + (1ull << 56) | (params->time_reg << 48) |
> > + (params->times_addr +
> > + offsetof(struct panthor_job_profiling_data, time.before))),
> > + /* STORE_STATE timer */
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_TIMESTAMP,
> > + (40ull << 56) | (params->time_reg << 40) | (0ll << 32)),
> >
> > /* MOV48 rX:rX+1, cs.start */
> > - (1ull << 56) | (addr_reg << 48) | job->call_info.start,
> > -
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (1ull << 56) | (params->addr_reg << 48) | params->cs_start),
> > /* MOV32 rX+2, cs.size */
> > - (2ull << 56) | (val_reg << 48) | job->call_info.size,
> > -
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (2ull << 56) | (params->val_reg << 48) | params->cs_size),
> > /* WAIT(0) => waits for FLUSH_CACHE2 instruction */
> > - (3ull << 56) | (1 << 16),
> > -
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED, (3ull << 56) | (1 << 16)),
> > /* CALL rX:rX+1, rX+2 */
> > - (32ull << 56) | (addr_reg << 40) | (val_reg << 32),
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (32ull << 56) | (params->addr_reg << 40) | (params->val_reg << 32)),
> > +
> > + /* MOV48 rX:rX+1, cycles_offset */
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_CYCLES,
> > + (1ull << 56) | (params->cycle_reg << 48) |
> > + (params->times_addr +
> > + offsetof(struct panthor_job_profiling_data, cycles.after))),
> > + /* STORE_STATE cycles */
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_CYCLES,
> > + (40ull << 56) | (params->cycle_reg << 40) | (1ll << 32)),
> > +
> > + /* MOV48 rX:rX+1, time_offset */
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_TIMESTAMP,
> > + (1ull << 56) | (params->time_reg << 48) |
> > + (params->times_addr +
> > + offsetof(struct panthor_job_profiling_data, time.after))),
> > + /* STORE_STATE timer */
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_TIMESTAMP,
> > + (40ull << 56) | (params->time_reg << 40) | (0ll << 32)),
> >
> > /* MOV48 rX:rX+1, sync_addr */
> > - (1ull << 56) | (addr_reg << 48) | sync_addr,
> > -
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (1ull << 56) | (params->addr_reg << 48) | params->sync_addr),
> > /* MOV48 rX+2, #1 */
> > - (1ull << 56) | (val_reg << 48) | 1,
> > -
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (1ull << 56) | (params->val_reg << 48) | 1),
> > /* WAIT(all) */
> > - (3ull << 56) | (waitall_mask << 16),
> > -
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (3ull << 56) | (params->waitall_mask << 16)),
> > /* SYNC_ADD64.system_scope.propage_err.nowait rX:rX+1, rX+2*/
> > - (51ull << 56) | (0ull << 48) | (addr_reg << 40) | (val_reg << 32) | (0 << 16) | 1,
> > -
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED,
> > + (51ull << 56) | (0ull << 48) | (params->addr_reg << 40) |
> > + (params->val_reg << 32) | (0 << 16) | 1),
> > /* ERROR_BARRIER, so we can recover from faults at job
> > * boundaries.
> > */
> > - (47ull << 56),
> > + JOB_INSTR(PANTHOR_DEVICE_PROFILING_DISABLED, (47ull << 56)),
> > + };
> > + u32 pad;
> > +
> > + /* NEED to be cacheline aligned to please the prefetcher. */
> > + static_assert(sizeof(instrs->buffer) % 64 == 0,
> > + "panthor_job_ringbuf_instrs::buffer is not aligned on a cacheline");
> > +
> > + /* Make sure we have enough storage to store the whole sequence. */
> > + static_assert(ALIGN(ARRAY_SIZE(instr_seq), NUM_INSTRS_PER_CACHE_LINE) <=
> > + ARRAY_SIZE(instrs->buffer),
> > + "instr_seq vs panthor_job_ringbuf_instrs::buffer size mismatch");
>
> We probably want to catch situations where instrs->buffer has gone
> bigger than needed (say we found a way to drop instructions), so I
> would turn the '<=' condition into an '=='.
I did this but it's triggering the static assert, because the instr_seq array has 19 elements,
which when aligned to NUM_INSTRS_PER_CACHE_LINE (8 I think) renders 24, still less than the
32 slots in instrs->buffer. Having a slightly oversized instrs.buffer array isn't a problem
though because instrs.count is being used when copying them into the ringbuffer, so I think
leaving this assert as an <= should be alright.
> > +
> > + for (u32 i = 0; i < ARRAY_SIZE(instr_seq); i++) {
> > + /* If the profile mask of this instruction is not enabled, skip it. */
> > + if (instr_seq[i].profile_mask &&
> > + !(instr_seq[i].profile_mask & params->profile_mask))
> > + continue;
> > +
> > + instrs->buffer[instrs->count++] = instr_seq[i].instr;
> > + }
> > +
> > + pad = ALIGN(instrs->count, NUM_INSTRS_PER_CACHE_LINE);
> > + memset(&instrs->buffer[instrs->count], 0,
> > + (pad - instrs->count) * sizeof(instrs->buffer[0]));
> > + instrs->count = pad;
> > +}
> > +
> > +static u32 calc_job_credits(u32 profile_mask)
> > +{
> > + struct panthor_job_ringbuf_instrs instrs;
> > + struct panthor_job_cs_params params = {
> > + .profile_mask = profile_mask,
> > };
> >
> > - /* Need to be cacheline aligned to please the prefetcher. */
> > - static_assert(sizeof(call_instrs) % 64 == 0,
> > - "call_instrs is not aligned on a cacheline");
> > + prepare_job_instrs(¶ms, &instrs);
> > + return instrs.count;
> > +}
> > +
> > +static struct dma_fence *
> > +queue_run_job(struct drm_sched_job *sched_job)
> > +{
> > + struct panthor_job *job = container_of(sched_job, struct panthor_job, base);
> > + struct panthor_group *group = job->group;
> > + struct panthor_queue *queue = group->queues[job->queue_idx];
> > + struct panthor_device *ptdev = group->ptdev;
> > + struct panthor_scheduler *sched = ptdev->scheduler;
> > + struct panthor_job_ringbuf_instrs instrs;
> > + struct panthor_job_cs_params cs_params;
> > + struct dma_fence *done_fence;
> > + int ret;
> >
> > /* Stream size is zero, nothing to do except making sure all previously
> > * submitted jobs are done before we signal the
> > @@ -2900,17 +3078,23 @@ queue_run_job(struct drm_sched_job *sched_job)
> > queue->fence_ctx.id,
> > atomic64_inc_return(&queue->fence_ctx.seqno));
> >
> > - memcpy(queue->ringbuf->kmap + ringbuf_insert,
> > - call_instrs, sizeof(call_instrs));
> > + job->profiling_slot = queue->profiling_info.profiling_seqno++;
> > + if (queue->profiling_info.profiling_seqno == queue->profiling_info.slot_count)
> > + queue->profiling_info.profiling_seqno = 0;
> > +
> > + job->ringbuf.start = queue->iface.input->insert;
> > +
> > + get_job_cs_params(job, &cs_params);
> > + prepare_job_instrs(&cs_params, &instrs);
> > + copy_instrs_to_ringbuf(queue, job, &instrs);
> > +
> > + job->ringbuf.end = job->ringbuf.start + (instrs.count * sizeof(u64));
> >
> > panthor_job_get(&job->base);
> > spin_lock(&queue->fence_ctx.lock);
> > list_add_tail(&job->node, &queue->fence_ctx.in_flight_jobs);
> > spin_unlock(&queue->fence_ctx.lock);
> >
> > - job->ringbuf.start = queue->iface.input->insert;
> > - job->ringbuf.end = job->ringbuf.start + sizeof(call_instrs);
> > -
> > /* Make sure the ring buffer is updated before the INSERT
> > * register.
> > */
> > @@ -3003,6 +3187,24 @@ static const struct drm_sched_backend_ops panthor_queue_sched_ops = {
> > .free_job = queue_free_job,
> > };
> >
> > +static u32 calc_profiling_ringbuf_num_slots(struct panthor_device *ptdev,
> > + u32 cs_ringbuf_size)
> > +{
> > + u32 min_profiled_job_instrs = U32_MAX;
> > + u32 last_flag = fls(PANTHOR_DEVICE_PROFILING_ALL);
> > +
> > + for (u32 i = 0; i < last_flag; i++) {
> > + if (BIT(i) & PANTHOR_DEVICE_PROFILING_ALL)
> > + min_profiled_job_instrs =
> > + min(min_profiled_job_instrs, calc_job_credits(BIT(i)));
> > + }
>
> Okay, I think this loop deserves an explanation. The goal is to
> calculate the minimal size of a profile job so we can deduce the
> maximum number of profiling slots that will be used simultaneously. We
> ignore PANTHOR_DEVICE_PROFILING_DISABLED, because those jobs won't use
> a profiling slot in the first place.
>
> > +
> > + drm_WARN_ON(&ptdev->base,
> > + !IS_ALIGNED(min_profiled_job_instrs, NUM_INSTRS_PER_CACHE_LINE));
>
> We can probably drop this WARN_ON(), it's supposed to be checked in
> calc_job_credits().
>
> > +
> > + return DIV_ROUND_UP(cs_ringbuf_size, min_profiled_job_instrs * sizeof(u64));
> > +}
> > +
> > static struct panthor_queue *
> > group_create_queue(struct panthor_group *group,
> > const struct drm_panthor_queue_create *args)
> > @@ -3056,9 +3258,38 @@ group_create_queue(struct panthor_group *group,
> > goto err_free_queue;
> > }
> >
> > + queue->profiling_info.slot_count =
> > + calc_profiling_ringbuf_num_slots(group->ptdev, args->ringbuf_size);
> > +
> > + queue->profiling_info.slots =
> > + panthor_kernel_bo_create(group->ptdev, group->vm,
> > + queue->profiling_info.slot_count *
> > + sizeof(struct panthor_job_profiling_data),
> > + DRM_PANTHOR_BO_NO_MMAP,
> > + DRM_PANTHOR_VM_BIND_OP_MAP_NOEXEC |
> > + DRM_PANTHOR_VM_BIND_OP_MAP_UNCACHED,
> > + PANTHOR_VM_KERNEL_AUTO_VA);
> > +
> > + if (IS_ERR(queue->profiling_info.slots)) {
> > + ret = PTR_ERR(queue->profiling_info.slots);
> > + goto err_free_queue;
> > + }
> > +
> > + ret = panthor_kernel_bo_vmap(queue->profiling_info.slots);
> > + if (ret)
> > + goto err_free_queue;
> > +
> > + memset(queue->profiling_info.slots->kmap, 0,
> > + queue->profiling_info.slot_count * sizeof(struct panthor_job_profiling_data));
>
> I don't think we need to memset() the profiling buffer.
>
> > +
> > + /*
> > + * Credit limit argument tells us the total number of instructions
> > + * across all CS slots in the ringbuffer, with some jobs requiring
> > + * twice as many as others, depending on their profiling status.
> > + */
> > ret = drm_sched_init(&queue->scheduler, &panthor_queue_sched_ops,
> > group->ptdev->scheduler->wq, 1,
> > - args->ringbuf_size / (NUM_INSTRS_PER_SLOT * sizeof(u64)),
> > + args->ringbuf_size / sizeof(u64),
> > 0, msecs_to_jiffies(JOB_TIMEOUT_MS),
> > group->ptdev->reset.wq,
> > NULL, "panthor-queue", group->ptdev->base.dev);
> > @@ -3354,6 +3585,7 @@ panthor_job_create(struct panthor_file *pfile,
> > {
> > struct panthor_group_pool *gpool = pfile->groups;
> > struct panthor_job *job;
> > + u32 credits;
> > int ret;
> >
> > if (qsubmit->pad)
> > @@ -3407,9 +3639,16 @@ panthor_job_create(struct panthor_file *pfile,
> > }
> > }
> >
> > + job->profile_mask = pfile->ptdev->profile_mask;
> > + credits = calc_job_credits(job->profile_mask);
> > + if (credits == 0) {
> > + ret = -EINVAL;
> > + goto err_put_job;
> > + }
> > +
> > ret = drm_sched_job_init(&job->base,
> > &job->group->queues[job->queue_idx]->entity,
> > - 1, job->group);
> > + credits, job->group);
> > if (ret)
> > goto err_put_job;
> >
>
> Just add a bunch of minor comments (mostly cosmetic changes), but the
> implementation looks good to me.
>
> Reviewed-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxx>
Adrian Larumbe
