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 724E72701D1; Tue, 11 Nov 2025 01:09:24 +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=1762823364; cv=none; b=msIwKiCuXaQLKx7SPIkwdMv1Gu1pQewb6E9NIkdKCi831IrnA3a31nWOTF68JUM8BOyzGotCygdZItztaMXQERW4nbsFOoQfBhdZ5VaeCgNJL2hFLYnsY+w8+ruODgDNsDIsGI2sUs4pFcLVFHEWgeVK3jraiGZVmjEUtR0udc8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762823364; c=relaxed/simple; bh=JcvVAHFfnpb2IlJc7jBjSyh7wuMWBEtG2ujTrBcSe2U=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=u7fDwJF2zkvCTotn3CsTzgGxRyQXppdYrNVRiwSFoHSzHCGnBwBWnTaH25j+ybIkh2Q8MUe1//HWoHLN30PzRLar1ZFV7mrkArvsfQIduoG+KndZ/WM0bkzVwyh5uYkkYONf44JV97e87JRSADJQgHQPQnYErZb7nJk8mR1HzTQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=wXnURVWi; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="wXnURVWi" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 14FF2C19421; Tue, 11 Nov 2025 01:09:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1762823364; bh=JcvVAHFfnpb2IlJc7jBjSyh7wuMWBEtG2ujTrBcSe2U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=wXnURVWiRbgNQh2HpeyvKgVElmV7lsAIqAIywg7/85U8Bo66+IrQ0Jrmuu7GmwZX9 I/fZ3VWblKKDjqa4JxRouh9FuT+c0/IxyWtKfyDoPDzNrNzpB943SEJmak6F7zQTM6 BH+tEBaR12RH0dM7CJ/6ZRxOrkTgundo/Oi7bbms= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Jiang Liu , Meng Li , Alex Deucher , Lijo Lazar , Sasha Levin Subject: [PATCH 6.17 248/849] drm/amd/amdgpu: Release xcp drm memory after unplug Date: Tue, 11 Nov 2025 09:36:58 +0900 Message-ID: <20251111004542.428545210@linuxfoundation.org> X-Mailer: git-send-email 2.51.2 In-Reply-To: <20251111004536.460310036@linuxfoundation.org> References: <20251111004536.460310036@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.17-stable review patch. If anyone has any objections, please let me know. ------------------ From: Meng Li [ Upstream commit e6c2b0f23221ed43c4cc6f636e9ab7862954d562 ] Add a new API amdgpu_xcp_drm_dev_free(). After unplug xcp device, need to release xcp drm memory etc. Co-developed-by: Jiang Liu Signed-off-by: Jiang Liu Signed-off-by: Meng Li Acked-by: Alex Deucher Reviewed-by: Lijo Lazar Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c | 1 + drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c | 56 +++++++++++++++++---- drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h | 1 + 3 files changed, 49 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c index c417f86892207..699acc1b46b59 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c @@ -406,6 +406,7 @@ void amdgpu_xcp_dev_unplug(struct amdgpu_device *adev) p_ddev->primary->dev = adev->xcp_mgr->xcp[i].pdev; p_ddev->driver = adev->xcp_mgr->xcp[i].driver; p_ddev->vma_offset_manager = adev->xcp_mgr->xcp[i].vma_offset_manager; + amdgpu_xcp_drm_dev_free(p_ddev); } } diff --git a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c index 8bc36f04b1b71..44009aa8216ed 100644 --- a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c +++ b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.c @@ -46,18 +46,29 @@ static const struct drm_driver amdgpu_xcp_driver = { static int8_t pdev_num; static struct xcp_device *xcp_dev[MAX_XCP_PLATFORM_DEVICE]; +static DEFINE_MUTEX(xcp_mutex); int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev) { struct platform_device *pdev; struct xcp_device *pxcp_dev; char dev_name[20]; - int ret; + int ret, i; + + guard(mutex)(&xcp_mutex); if (pdev_num >= MAX_XCP_PLATFORM_DEVICE) return -ENODEV; - snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", pdev_num); + for (i = 0; i < MAX_XCP_PLATFORM_DEVICE; i++) { + if (!xcp_dev[i]) + break; + } + + if (i >= MAX_XCP_PLATFORM_DEVICE) + return -ENODEV; + + snprintf(dev_name, sizeof(dev_name), "amdgpu_xcp_%d", i); pdev = platform_device_register_simple(dev_name, -1, NULL, 0); if (IS_ERR(pdev)) return PTR_ERR(pdev); @@ -73,8 +84,8 @@ int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev) goto out_devres; } - xcp_dev[pdev_num] = pxcp_dev; - xcp_dev[pdev_num]->pdev = pdev; + xcp_dev[i] = pxcp_dev; + xcp_dev[i]->pdev = pdev; *ddev = &pxcp_dev->drm; pdev_num++; @@ -89,16 +100,43 @@ int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev) } EXPORT_SYMBOL(amdgpu_xcp_drm_dev_alloc); -void amdgpu_xcp_drv_release(void) +static void free_xcp_dev(int8_t index) { - for (--pdev_num; pdev_num >= 0; --pdev_num) { - struct platform_device *pdev = xcp_dev[pdev_num]->pdev; + if ((index < MAX_XCP_PLATFORM_DEVICE) && (xcp_dev[index])) { + struct platform_device *pdev = xcp_dev[index]->pdev; devres_release_group(&pdev->dev, NULL); platform_device_unregister(pdev); - xcp_dev[pdev_num] = NULL; + + xcp_dev[index] = NULL; + pdev_num--; + } +} + +void amdgpu_xcp_drm_dev_free(struct drm_device *ddev) +{ + int8_t i; + + guard(mutex)(&xcp_mutex); + + for (i = 0; i < MAX_XCP_PLATFORM_DEVICE; i++) { + if ((xcp_dev[i]) && (&xcp_dev[i]->drm == ddev)) { + free_xcp_dev(i); + break; + } + } +} +EXPORT_SYMBOL(amdgpu_xcp_drm_dev_free); + +void amdgpu_xcp_drv_release(void) +{ + int8_t i; + + guard(mutex)(&xcp_mutex); + + for (i = 0; pdev_num && i < MAX_XCP_PLATFORM_DEVICE; i++) { + free_xcp_dev(i); } - pdev_num = 0; } EXPORT_SYMBOL(amdgpu_xcp_drv_release); diff --git a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h index c1c4b679bf95c..580a1602c8e36 100644 --- a/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h +++ b/drivers/gpu/drm/amd/amdxcp/amdgpu_xcp_drv.h @@ -25,5 +25,6 @@ #define _AMDGPU_XCP_DRV_H_ int amdgpu_xcp_drm_dev_alloc(struct drm_device **ddev); +void amdgpu_xcp_drm_dev_free(struct drm_device *ddev); void amdgpu_xcp_drv_release(void); #endif /* _AMDGPU_XCP_DRV_H_ */ -- 2.51.0