[PATCH 06/11] drm/amdkfd: Use VMID bitmap from KGD

Oded Gabbay oded.gabbay at gmail.com
Sun Sep 17 11:47:45 UTC 2017


On Sat, Sep 16, 2017 at 2:42 AM, Felix Kuehling <Felix.Kuehling at amd.com> wrote:
> From: Yong Zhao <yong.zhao at amd.com>
>
> The hard-coded values related to VMID were removed in KFD, as those
> values can be calculated in the KFD initialization function.
>
> Signed-off-by: Yong Zhao <yong.zhao at amd.com>
> Signed-off-by: Felix Kuehling <Felix.Kuehling at amd.com>
> ---
>  drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c                |  9 ++-------
>  drivers/gpu/drm/amd/amdkfd/kfd_device.c                |  7 +++++++
>  drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c  | 13 ++++++-------
>  drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h  |  4 ----
>  drivers/gpu/drm/amd/amdkfd/kfd_priv.h                  |  7 +++++++
>  drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c |  2 +-
>  6 files changed, 23 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c b/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
> index 0aa021a..7d5635f 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_dbgdev.c
> @@ -769,13 +769,8 @@ int dbgdev_wave_reset_wavefronts(struct kfd_dev *dev, struct kfd_process *p)
>         union GRBM_GFX_INDEX_BITS reg_gfx_index;
>         struct kfd_process_device *pdd;
>         struct dbg_wave_control_info wac_info;
> -       int temp;
> -       int first_vmid_to_scan = 8;
> -       int last_vmid_to_scan = 15;
> -
> -       first_vmid_to_scan = ffs(dev->shared_resources.compute_vmid_bitmap) - 1;
> -       temp = dev->shared_resources.compute_vmid_bitmap >> first_vmid_to_scan;
> -       last_vmid_to_scan = first_vmid_to_scan + ffz(temp);
> +       int first_vmid_to_scan = dev->vm_info.first_vmid_kfd;
> +       int last_vmid_to_scan = dev->vm_info.last_vmid_kfd;
>
>         reg_sq_cmd.u32All = 0;
>         status = 0;
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device.c b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> index ff3f97c..abf91b0 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device.c
> @@ -223,9 +223,16 @@ bool kgd2kfd_device_init(struct kfd_dev *kfd,
>                          const struct kgd2kfd_shared_resources *gpu_resources)
>  {
>         unsigned int size;
> +       unsigned int vmid_bitmap_kfd;
>
>         kfd->shared_resources = *gpu_resources;
>
> +       vmid_bitmap_kfd = kfd->shared_resources.compute_vmid_bitmap;
Unnecessary copy, just use kfd->shared_resources.compute_vmid_bitmap
in the below lines. If you want a shorter name, use a pointer.

> +       kfd->vm_info.first_vmid_kfd = ffs(vmid_bitmap_kfd) - 1;
> +       kfd->vm_info.last_vmid_kfd = fls(vmid_bitmap_kfd) - 1;
> +       kfd->vm_info.vmid_num_kfd = kfd->vm_info.last_vmid_kfd
> +                       - kfd->vm_info.first_vmid_kfd + 1;
> +
>         /* calculate max size of mqds needed for queues */
>         size = max_num_of_queues_per_device *
>                         kfd->device_info->mqd_size_aligned;
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> index 5da7ef4..897ff083 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c
> @@ -113,11 +113,11 @@ static int allocate_vmid(struct device_queue_manager *dqm,
>         if (dqm->vmid_bitmap == 0)
>                 return -ENOMEM;
>
> -       bit = find_first_bit((unsigned long *)&dqm->vmid_bitmap, CIK_VMID_NUM);
> +       bit = find_first_bit((unsigned long *)&dqm->vmid_bitmap,
> +                               dqm->dev->vm_info.vmid_num_kfd);
>         clear_bit(bit, (unsigned long *)&dqm->vmid_bitmap);
>
> -       /* Kaveri kfd vmid's starts from vmid 8 */
> -       allocated_vmid = bit + KFD_VMID_START_OFFSET;
> +       allocated_vmid = bit + dqm->dev->vm_info.first_vmid_kfd;
>         pr_debug("vmid allocation %d\n", allocated_vmid);
>         qpd->vmid = allocated_vmid;
>         q->properties.vmid = allocated_vmid;
> @@ -132,7 +132,7 @@ static void deallocate_vmid(struct device_queue_manager *dqm,
>                                 struct qcm_process_device *qpd,
>                                 struct queue *q)
>  {
> -       int bit = qpd->vmid - KFD_VMID_START_OFFSET;
> +       int bit = qpd->vmid - dqm->dev->vm_info.first_vmid_kfd;
>
>         /* Release the vmid mapping */
>         set_pasid_vmid_mapping(dqm, 0, qpd->vmid);
> @@ -507,7 +507,7 @@ static int initialize_nocpsch(struct device_queue_manager *dqm)
>                                 dqm->allocated_queues[pipe] |= 1 << queue;
>         }
>
> -       dqm->vmid_bitmap = (1 << VMID_PER_DEVICE) - 1;
> +       dqm->vmid_bitmap = (1 << dqm->dev->vm_info.vmid_num_kfd) - 1;
>         dqm->sdma_bitmap = (1 << CIK_SDMA_QUEUES) - 1;
>
>         return 0;
> @@ -613,8 +613,7 @@ static int set_sched_resources(struct device_queue_manager *dqm)
>         int i, mec;
>         struct scheduling_resources res;
>
> -       res.vmid_mask = (1 << VMID_PER_DEVICE) - 1;
> -       res.vmid_mask <<= KFD_VMID_START_OFFSET;
> +       res.vmid_mask = dqm->dev->shared_resources.compute_vmid_bitmap;
>
>         res.queue_mask = 0;
>         for (i = 0; i < KGD_MAX_QUEUES; ++i) {
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
> index 99e2305..60d46ce 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.h
> @@ -32,10 +32,6 @@
>  #define KFD_UNMAP_LATENCY_MS                   (4000)
>  #define QUEUE_PREEMPT_DEFAULT_TIMEOUT_MS (2 * KFD_UNMAP_LATENCY_MS + 1000)
>
> -#define CIK_VMID_NUM                           (8)
> -#define KFD_VMID_START_OFFSET                  (8)
> -#define VMID_PER_DEVICE                                CIK_VMID_NUM
> -#define KFD_DQM_FIRST_PIPE                     (0)
>  #define CIK_SDMA_QUEUES                                (4)
>  #define CIK_SDMA_QUEUES_PER_ENGINE             (2)
>  #define CIK_SDMA_ENGINE_NUM                    (2)
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> index 099dc33..7bed4ef 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_priv.h
> @@ -141,6 +141,12 @@ struct kfd_mem_obj {
>         uint32_t *cpu_ptr;
>  };
>
> +struct kfd_vmid_info {
> +       uint32_t first_vmid_kfd;
> +       uint32_t last_vmid_kfd;
> +       uint32_t vmid_num_kfd;
> +};
> +
>  struct kfd_dev {
>         struct kgd_dev *kgd;
>
> @@ -165,6 +171,7 @@ struct kfd_dev {
>                                            */
>
>         struct kgd2kfd_shared_resources shared_resources;
> +       struct kfd_vmid_info vm_info;
>
>         const struct kfd2kgd_calls *kfd2kgd;
>         struct mutex doorbell_mutex;
> diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
> index 1cae95e..c047534 100644
> --- a/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
> +++ b/drivers/gpu/drm/amd/amdkfd/kfd_process_queue_manager.c
> @@ -188,7 +188,7 @@ int pqm_create_queue(struct process_queue_manager *pqm,
>         case KFD_QUEUE_TYPE_COMPUTE:
>                 /* check if there is over subscription */
>                 if ((sched_policy == KFD_SCHED_POLICY_HWS_NO_OVERSUBSCRIPTION) &&
> -               ((dev->dqm->processes_count >= VMID_PER_DEVICE) ||
> +               ((dev->dqm->processes_count >= dev->vm_info.vmid_num_kfd) ||
>                 (dev->dqm->queue_count >= get_queues_num(dev->dqm)))) {
>                         pr_err("Over-subscription is not allowed in radeon_kfd.sched_policy == 1\n");
>                         retval = -EPERM;
> --
> 2.7.4
>
> _______________________________________________
> amd-gfx mailing list
> amd-gfx at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/amd-gfx

With the above comment fixed, this patch is:
Reviewed-by: Oded Gabbay <oded.gabbay at gmail.com>


More information about the amd-gfx mailing list