> -----Original Message-----
> From: Chen, Guchun <guchun.c...@amd.com>
> Sent: 2019年9月30日 15:14
> To: Zhou1, Tao <tao.zh...@amd.com>; amd-gfx@lists.freedesktop.org;
> Zhang, Hawking <hawking.zh...@amd.com>
> Subject: RE: [PATCH] drm/amdgpu: avoid ras error injection for retired page
>
>
>
>
> Regards,
> Guchun
>
> -----Original Message-----
> From: Zhou1, Tao <tao.zh...@amd.com>
> Sent: Monday, September 30, 2019 2:58 PM
> To: amd-gfx@lists.freedesktop.org; Chen, Guchun
> <guchun.c...@amd.com>; Zhang, Hawking <hawking.zh...@amd.com>
> Cc: Zhou1, Tao <tao.zh...@amd.com>
> Subject: [PATCH] drm/amdgpu: avoid ras error injection for retired page
>
> check whether a page is bad page before error injection
>
> Signed-off-by: Tao Zhou <tao.zh...@amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 38
> +++++++++++++++++++++++++
> 1 file changed, 38 insertions(+)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> index fe3a57e567c8..d50e565b0b20 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c
> @@ -71,6 +71,9 @@ const char *ras_block_string[] = {
>
> atomic_t amdgpu_ras_in_intr = ATOMIC_INIT(0);
>
> +static bool amdgpu_ras_check_bad_page(struct amdgpu_device *adev,
> + uint64_t addr);
> +
> static ssize_t amdgpu_ras_debugfs_read(struct file *f, char __user *buf,
> size_t size, loff_t *pos)
> {
> @@ -290,6 +293,13 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct
> file *f, const char __user *
> break;
> }
>
> + /* ce/ue error injection for a bad page is not allowed */
> + if (amdgpu_ras_check_bad_page(adev, data.inject.address))
> {
> + DRM_WARN("DRM WARN: 0x%llx has been marked
> as bad before error injection!\n",
> + data.inject.address);
> + break;
> + }
> +
> /* data.inject.address is offset instead of absolute gpu
> address */
> ret = amdgpu_ras_error_inject(adev, &data.inject);
> break;
> @@ -1430,6 +1440,34 @@ static int amdgpu_ras_load_bad_pages(struct
> amdgpu_device *adev)
> return ret;
> }
>
> +/* check if an address belongs to bad page */ static bool
> +amdgpu_ras_check_bad_page(struct amdgpu_device *adev,
> + uint64_t addr)
> +{
> + struct amdgpu_ras *con = amdgpu_ras_get_context(adev);
> + struct ras_err_handler_data *data;
> + int i, ret = false;
> [Guchun]It's better to use bool type for the ret variable, to keep consistent
> with function return type?
> Apart from that, this patch is: Reviewed-by: Guchun Chen
> <guchun.c...@amd.com>
[Tao] Thanks, I'll correct it before submit.
>
> +
> + if (!con || !con->eh_data)
> + return ret;
> +
> + mutex_lock(&con->recovery_lock);
> + data = con->eh_data;
> + if (!data)
> + goto out;
> +
> + addr >>= AMDGPU_GPU_PAGE_SHIFT;
> + for (i = 0; i < data->count; i++)
> + if (addr == data->bps[i].retired_page) {
> + ret = true;
> + goto out;
> + }
> +
> +out:
> + mutex_unlock(&con->recovery_lock);
> + return ret;
> +}
> +
> static void amdgpu_ras_create_bad_pages_bo(struct amdgpu_device *adev)
> {
> /* Note: the caller should guarantee con and data are not NULL */
> --
> 2.17.1
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