From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 721AE19F11E for ; Thu, 6 Nov 2025 18:31:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762453899; cv=none; b=LhrUQ35/31KO7VI1+kmcWTMwPKfePuOpimddpQ5WOIG4MTBoH6cZ84ywFRWUcnA5L0qwMh0MC0R2xW4VCSVXCNISImEGF0UlhlfqReDFprl1HmNd5gyUaGzCL9zzTRC4VbtGgWw1p82FeL4KHuUUP0i2y1bx2aBegshvqUELwkQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762453899; c=relaxed/simple; bh=70HnRDx3FkZUD2hlC+mCI8rhN3NqCBxqmvVYvxqXTD8=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=XBpIDj+VODdk/dwbkSKCEZDcpXfrtVw/0A5umECombDluBlG8yo+aoA7/gaEDMrdP5Rq5uStBClIQNZ9gTh1ZI9YMaIn6ydAPH9n15+Zl9DtzdcVaXcUTW8eUu1/AKihpGK6XQj2mgrsrbfDdH+/gDus6wZ1kc5vZ66Gv7zhn2I= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=H5aYtNzS; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="H5aYtNzS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5977CC4CEFB; Thu, 6 Nov 2025 18:31:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1762453898; bh=70HnRDx3FkZUD2hlC+mCI8rhN3NqCBxqmvVYvxqXTD8=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=H5aYtNzSRTaTzOKqBlTAo1EwKXonT6gfzejA8KL9YM12/Q/qiABcWJd6z8/B7gqy4 OuNY3zS7JM4a41zlbBMleiCiX08DJVGH1h5tjnKvGpASZBLLxxCBMAuY4DODtdNbBY BOxho5bNqlvqtuCYk7/SNEMPvNqVpuhPDyzEtQ7i1R702AXhzLNIDcq1vXK5B5LSSN kuRJ2gQmBb4Y8hOG6JLKGHiU7HCLenjO9bjsQnLI/IKIxZgAtFmuq7XOSO+Y5/XCXB H1C+mn/QlLepKfgPqTnkT+EKXiuGIr0I9YBPF7z6nT+gDFE8wlNPyWIwvm6gVUyP1N ByRsmcBtVUdjg== Message-ID: <2dcb4668-2c4d-4c73-9805-1af1338c9e7d@kernel.org> Date: Thu, 6 Nov 2025 12:31:37 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] accel/amdxdna: Treat power-off failure as unrecoverable error To: Lizhi Hou , ogabbay@kernel.org, quic_jhugo@quicinc.com, maciej.falkowski@linux.intel.com, dri-devel@lists.freedesktop.org Cc: linux-kernel@vger.kernel.org, max.zhen@amd.com, sonal.santan@amd.com References: <20251106180521.1095218-1-lizhi.hou@amd.com> <978dcea6-4d25-3b33-695a-632a9f58884c@amd.com> Content-Language: en-US From: Mario Limonciello In-Reply-To: <978dcea6-4d25-3b33-695a-632a9f58884c@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit On 11/6/25 12:19 PM, Lizhi Hou wrote: > > On 11/6/25 10:12, Mario Limonciello wrote: >> On 11/6/25 12:05 PM, Lizhi Hou wrote: >>> Failing to set power off indicates an unrecoverable hardware or firmware >>> error. Update the driver to treat such a failure as a fatal condition >>> and stop further operations that depend on successful power state >>> transition. >>> >>> This prevents undefined behavior when the hardware remains in an >>> unexpected state after a failed power-off attempt. >>> >>> Signed-off-by: Lizhi Hou >> >> Presumably all versions of hardware in the wild can handle receiving a >> power off command if they're already powered off? > > Yes for the aie2 platforms. This was verified by xdna-driver pipeline > tests. > > OK LGTM then. Reviewed-by: Mario Limonciello (AMD) > Lizhi > >> >>> --- >>>   drivers/accel/amdxdna/aie2_smu.c | 10 ++++++++++ >>>   1 file changed, 10 insertions(+) >>> >>> diff --git a/drivers/accel/amdxdna/aie2_smu.c b/drivers/accel/ >>> amdxdna/aie2_smu.c >>> index 11c0e9e7b03a..bd94ee96c2bc 100644 >>> --- a/drivers/accel/amdxdna/aie2_smu.c >>> +++ b/drivers/accel/amdxdna/aie2_smu.c >>> @@ -147,6 +147,16 @@ int aie2_smu_init(struct amdxdna_dev_hdl *ndev) >>>   { >>>       int ret; >>>   +    /* >>> +     * Failing to set power off indicates an unrecoverable hardware or >>> +     * firmware error. >>> +     */ >>> +    ret = aie2_smu_exec(ndev, AIE2_SMU_POWER_OFF, 0, NULL); >>> +    if (ret) { >>> +        XDNA_ERR(ndev->xdna, "Access power failed, ret %d", ret); >>> +        return ret; >>> +    } >>> + >>>       ret = aie2_smu_exec(ndev, AIE2_SMU_POWER_ON, 0, NULL); >>>       if (ret) { >>>           XDNA_ERR(ndev->xdna, "Power on failed, ret %d", ret); >>