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Date: Wed, 3 Jul 2019 10:31:28 +0300
From: Oded Gabbay <oded.gabbay@...il.com>
To: Tomer Tayar <ttayar@...ana.ai>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 3/3] habanalabs: Add busy engines bitmask to HW idle IOCTL
On Mon, Jul 1, 2019 at 4:59 PM Tomer Tayar <ttayar@...ana.ai> wrote:
>
> The information which is currently provided as a response to the
> "HL_INFO_HW_IDLE" IOCTL is merely a general boolean value.
> This patch extends it and provides also a bitmask that indicates which
> of the device engines are busy.
>
> Signed-off-by: Tomer Tayar <ttayar@...ana.ai>
> ---
> drivers/misc/habanalabs/debugfs.c | 2 +-
> drivers/misc/habanalabs/goya/goya.c | 11 ++++++--
> drivers/misc/habanalabs/habanalabs.h | 3 ++-
> drivers/misc/habanalabs/habanalabs_ioctl.c | 3 ++-
> include/uapi/misc/habanalabs.h | 30 +++++++++++++++++++++-
> 5 files changed, 43 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/misc/habanalabs/debugfs.c b/drivers/misc/habanalabs/debugfs.c
> index 6a5dfb14eca1..18e499c900c7 100644
> --- a/drivers/misc/habanalabs/debugfs.c
> +++ b/drivers/misc/habanalabs/debugfs.c
> @@ -506,7 +506,7 @@ static int engines_show(struct seq_file *s, void *data)
> struct hl_dbg_device_entry *dev_entry = entry->dev_entry;
> struct hl_device *hdev = dev_entry->hdev;
>
> - hdev->asic_funcs->is_device_idle(hdev, s);
> + hdev->asic_funcs->is_device_idle(hdev, NULL, s);
>
> return 0;
> }
> diff --git a/drivers/misc/habanalabs/goya/goya.c b/drivers/misc/habanalabs/goya/goya.c
> index 41e97531f300..75294ec65257 100644
> --- a/drivers/misc/habanalabs/goya/goya.c
> +++ b/drivers/misc/habanalabs/goya/goya.c
> @@ -2828,7 +2828,7 @@ static int goya_send_job_on_qman0(struct hl_device *hdev, struct hl_cs_job *job)
> else
> timeout = HL_DEVICE_TIMEOUT_USEC;
>
> - if (!hdev->asic_funcs->is_device_idle(hdev, NULL)) {
> + if (!hdev->asic_funcs->is_device_idle(hdev, NULL, NULL)) {
> dev_err_ratelimited(hdev->dev,
> "Can't send KMD job on QMAN0 because the device is not idle\n");
> return -EBUSY;
> @@ -4914,7 +4914,8 @@ int goya_armcp_info_get(struct hl_device *hdev)
> return 0;
> }
>
> -static bool goya_is_device_idle(struct hl_device *hdev, struct seq_file *s)
> +static bool goya_is_device_idle(struct hl_device *hdev, u32 *mask,
> + struct seq_file *s)
> {
> const char *fmt = "%-5d%-9s%#-14x%#-16x%#x\n";
> const char *dma_fmt = "%-5d%-9s%#-14x%#x\n";
> @@ -4937,6 +4938,8 @@ static bool goya_is_device_idle(struct hl_device *hdev, struct seq_file *s)
> IS_DMA_IDLE(dma_core_sts0);
> is_idle &= is_eng_idle;
>
> + if (mask)
> + *mask |= !is_eng_idle << (GOYA_ENGINE_ID_DMA_0 + i);
> if (s)
> seq_printf(s, dma_fmt, i, is_eng_idle ? "Y" : "N",
> qm_glbl_sts0, dma_core_sts0);
> @@ -4958,6 +4961,8 @@ static bool goya_is_device_idle(struct hl_device *hdev, struct seq_file *s)
> IS_TPC_IDLE(tpc_cfg_sts);
> is_idle &= is_eng_idle;
>
> + if (mask)
> + *mask |= !is_eng_idle << (GOYA_ENGINE_ID_TPC_0 + i);
> if (s)
> seq_printf(s, fmt, i, is_eng_idle ? "Y" : "N",
> qm_glbl_sts0, cmdq_glbl_sts0, tpc_cfg_sts);
> @@ -4976,6 +4981,8 @@ static bool goya_is_device_idle(struct hl_device *hdev, struct seq_file *s)
> IS_MME_IDLE(mme_arch_sts);
> is_idle &= is_eng_idle;
>
> + if (mask)
> + *mask |= !is_eng_idle << GOYA_ENGINE_ID_MME_0;
> if (s) {
> seq_printf(s, fmt, 0, is_eng_idle ? "Y" : "N", qm_glbl_sts0,
> cmdq_glbl_sts0, mme_arch_sts);
> diff --git a/drivers/misc/habanalabs/habanalabs.h b/drivers/misc/habanalabs/habanalabs.h
> index 2c9ea61099b4..10da9940ee0d 100644
> --- a/drivers/misc/habanalabs/habanalabs.h
> +++ b/drivers/misc/habanalabs/habanalabs.h
> @@ -557,7 +557,8 @@ struct hl_asic_funcs {
> u32 asid, u64 va, u64 size);
> int (*send_heartbeat)(struct hl_device *hdev);
> int (*debug_coresight)(struct hl_device *hdev, void *data);
> - bool (*is_device_idle)(struct hl_device *hdev, struct seq_file *s);
> + bool (*is_device_idle)(struct hl_device *hdev, u32 *mask,
> + struct seq_file *s);
> int (*soft_reset_late_init)(struct hl_device *hdev);
> void (*hw_queues_lock)(struct hl_device *hdev);
> void (*hw_queues_unlock)(struct hl_device *hdev);
> diff --git a/drivers/misc/habanalabs/habanalabs_ioctl.c b/drivers/misc/habanalabs/habanalabs_ioctl.c
> index b04585af27ad..07127576b3e8 100644
> --- a/drivers/misc/habanalabs/habanalabs_ioctl.c
> +++ b/drivers/misc/habanalabs/habanalabs_ioctl.c
> @@ -119,7 +119,8 @@ static int hw_idle(struct hl_device *hdev, struct hl_info_args *args)
> if ((!max_size) || (!out))
> return -EINVAL;
>
> - hw_idle.is_idle = hdev->asic_funcs->is_device_idle(hdev, NULL);
> + hw_idle.is_idle = hdev->asic_funcs->is_device_idle(hdev,
> + &hw_idle.busy_engines_mask, NULL);
>
> return copy_to_user(out, &hw_idle,
> min((size_t) max_size, sizeof(hw_idle))) ? -EFAULT : 0;
> diff --git a/include/uapi/misc/habanalabs.h b/include/uapi/misc/habanalabs.h
> index 204ab9b4ae67..3956c226ca35 100644
> --- a/include/uapi/misc/habanalabs.h
> +++ b/include/uapi/misc/habanalabs.h
> @@ -45,6 +45,30 @@ enum goya_queue_id {
> GOYA_QUEUE_ID_SIZE
> };
>
> +/*
> + * Engine Numbering
> + *
> + * Used in the "busy_engines_mask" field in `struct hl_info_hw_idle'
> + */
> +
> +enum goya_engine_id {
> + GOYA_ENGINE_ID_DMA_0 = 0,
> + GOYA_ENGINE_ID_DMA_1,
> + GOYA_ENGINE_ID_DMA_2,
> + GOYA_ENGINE_ID_DMA_3,
> + GOYA_ENGINE_ID_DMA_4,
> + GOYA_ENGINE_ID_MME_0,
> + GOYA_ENGINE_ID_TPC_0,
> + GOYA_ENGINE_ID_TPC_1,
> + GOYA_ENGINE_ID_TPC_2,
> + GOYA_ENGINE_ID_TPC_3,
> + GOYA_ENGINE_ID_TPC_4,
> + GOYA_ENGINE_ID_TPC_5,
> + GOYA_ENGINE_ID_TPC_6,
> + GOYA_ENGINE_ID_TPC_7,
> + GOYA_ENGINE_ID_SIZE
> +};
> +
> enum hl_device_status {
> HL_DEVICE_STATUS_OPERATIONAL,
> HL_DEVICE_STATUS_IN_RESET,
> @@ -86,7 +110,11 @@ struct hl_info_dram_usage {
>
> struct hl_info_hw_idle {
> __u32 is_idle;
> - __u32 pad;
> + /*
> + * Bitmask of busy engines.
> + * Bits definition is according to `enum <chip>_enging_id'.
> + */
> + __u32 busy_engines_mask;
> };
>
> struct hl_info_device_status {
> --
> 2.17.1
>
This patch-set is:
Reviewed-by: Oded Gabbay <oded.gabbay@...il.com>
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