From patchwork Thu Mar 13 11:40:10 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna Chaitanya Chundru X-Patchwork-Id: 873820 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (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 AD3E9266B4F for ; Thu, 13 Mar 2025 11:41:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741866066; cv=none; b=n6pBZUyDVB6lh6VMiOIno1LVWA/5xVYGpcznWmTwE2jiyyEmiEn6h5s+AJqlCLNv2a63wymXkhNC6B8MGl2RDCOXlbr2WF1AEhnq9C2DDQQNFhL6c5GP3IUv1o7qHRXvwxaVQRzfU/ePmCc5Pz72GqesTBPDQHbBx6BBwlAdZdo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1741866066; c=relaxed/simple; bh=PmKuDjh7TYnL36BsL4uFK3e2cvQCdB+O1CmCQrAD7C4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=Xvvrutz/SI0q+IDv7FTAwaBREId8APApHLr+JCe8e3oGyMEv2to+B+MRr2s9/+mGGM76/21mAQ+/r7Q7oDK+usUzG6mUVZjj0Lx0dvkacEl2JcKr/tibDMz76FD8Z/1l7u7e3hv3n1FzIQzOPwe3+V2oA/LJ6nw3ZZu77o02upc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=LJdpXMm1; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="LJdpXMm1" Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 52DAVNYl013284 for ; Thu, 13 Mar 2025 11:41:03 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= 9igTd27vOSt75Vx+/a3cETdMPX96Kxrxr1+ntLhQKa0=; b=LJdpXMm1EP47TTkE dCKCnyi9uSNuDrjG6kCvT1m0N04PDA+pLITKhF5ob+irswRvHAWAahJ41OoESqM2 pkvxkCxhZjb/jRCn01OLtWtekBZms7TBbH8dEhXjI+jeUmxymdWSKcRcmU1d/ss3 sfQoyyplCiN3SCCjY3ugZQYTnOlLqBvSZ1ePbOXC87DQ9naQgXCxuIYMAmpZgbyr zAAbdQLwiYlzOWzyRLnKjJz+XOqeSvBPZDbVdIGYs0AolySNYv67GPA9hlGXEv31 WYPVdyTDjBkNxCe1U59aZuKbbqpBXZ5MoKYQa9my4N5OCte9tGxmIFuevK+g/1jW v7S2uQ== Received: from mail-pj1-f72.google.com (mail-pj1-f72.google.com [209.85.216.72]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 45au2p5qna-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Thu, 13 Mar 2025 11:41:03 +0000 (GMT) Received: by mail-pj1-f72.google.com with SMTP id 98e67ed59e1d1-2ff58318acaso2526576a91.0 for ; Thu, 13 Mar 2025 04:41:03 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1741866062; x=1742470862; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=9igTd27vOSt75Vx+/a3cETdMPX96Kxrxr1+ntLhQKa0=; b=BelaML6oYZ4aMmP6U6NzKjx9Dr+O65AVT5foK4cu9XHNnT86C5Kdf1xsGiVm07h6mQ ys5nn++V2FWs4GYi3SPVIUqmNR5b7/qgEavO72gMLhuW+y5GFV8dkNn+txzXgRQYfPgj cnnxVWbV8HkTHFjAlG765dIn1epKcGdo0z8USjrWC9ZVTqYALGzaxsvMpETciyYT1ANK U8sACuW539EGL+nPSs0wiEWRvPMBapKDbVO4FuFCBNvfyLln5HNUPf41auXUXOBROyud aQ+7uluQdHyosX8ig113WRyKXn7cKD15MjU4HPYSfs8TZCiYogcRLIrfu8QO0neilnPZ yBSQ== X-Forwarded-Encrypted: i=1; AJvYcCW96xVaRcsd8eRufFyePTC540L4PtgkBq7P+f+wfyTSiUMsWEvs5n9HjoNm7R2dMyd/lWK6F4hjIhWu22aQIg==@vger.kernel.org X-Gm-Message-State: AOJu0YxEEjARj3IZTKA1oAw6U5OSW8ciDbXdM5TVLtICauVcLd5VQqAA KipvUmrNM7DHChhRZjsulrtrHYvswH/TsIb4CvmRTeRPJsTXUBpw/rld7iFl39ho6mUtmGW5VZ+ 6YzlwsZKI26d75BigiJaRvBmY1/7d4MEOj/2/nlrpkbGTdoiC7AU0tY8XmyEchL+6jQ== X-Gm-Gg: ASbGncsFXpA7fOEKhSwsgNJ2yqqxpeaQX1tvmpSqsNq6kISF3tnsmKj9H8Q3X60Krat oIk+IhVD75/Mc9aW10TZqYH6Nwbcs7pe46S4cxDOceN4meIzaFuCb8avaL3R+yhZY/KpX0s14+j FB/hbG07/9QirzBiPvc7Ke8lXvW05MGvSwvJuFzSMuQQ3KG0tA3MV8pN7dXnAjSNKqpGEgadPI/ 8N1q95ExI/yRlCgPNSUWlnEr2nSg5KxTemCgekj2R2DaX+1xPylU0bkeF56oEZUYRxYSxffN8fV 8I28glQa1hr9JKXy/BEhb204kYhQ0I0BJWlI0xCBcKmjNze5xH0= X-Received: by 2002:a05:6a21:6e91:b0:1f5:7eb5:72d1 with SMTP id adf61e73a8af0-1f57eb5751amr22690504637.28.1741866062275; Thu, 13 Mar 2025 04:41:02 -0700 (PDT) X-Google-Smtp-Source: AGHT+IHlL/GCRjzts+GtMG3DvPuELC8MTIBXKCPb9dz3VzWgArb8MlHvCY5x4YkSJvM9UW4P6sKDeA== X-Received: by 2002:a05:6a21:6e91:b0:1f5:7eb5:72d1 with SMTP id adf61e73a8af0-1f57eb5751amr22690452637.28.1741866061945; Thu, 13 Mar 2025 04:41:01 -0700 (PDT) Received: from hu-krichai-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-af56ea964e3sm1063219a12.76.2025.03.13.04.40.56 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Mar 2025 04:41:01 -0700 (PDT) From: Krishna Chaitanya Chundru Date: Thu, 13 Mar 2025 17:10:10 +0530 Subject: [PATCH v2 03/10] PCI: dwc: Implement .pre_scale_bus_bw() & .post_scale_bus_bw hook Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20250313-mhi_bw_up-v2-3-869ca32170bf@oss.qualcomm.com> References: <20250313-mhi_bw_up-v2-0-869ca32170bf@oss.qualcomm.com> In-Reply-To: <20250313-mhi_bw_up-v2-0-869ca32170bf@oss.qualcomm.com> To: Bjorn Helgaas , =?utf-8?q?Ilpo_J=C3=A4rvinen?= , Jingoo Han , Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Johannes Berg , Jeff Johnson Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, mhi@lists.linux.dev, linux-wireless@vger.kernel.org, ath11k@lists.infradead.org, quic_pyarlaga@quicinc.com, quic_vbadigan@quicinc.com, quic_vpernami@quicinc.com, quic_mrana@quicinc.com, Krishna Chaitanya Chundru , Jeff Johnson X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1741866038; l=2235; i=krishna.chundru@oss.qualcomm.com; s=20230907; h=from:subject:message-id; bh=PmKuDjh7TYnL36BsL4uFK3e2cvQCdB+O1CmCQrAD7C4=; b=VI/8VNWycXRlPi0pSYk0Fr6aifEQor01L8qOLpfV49fEVzw8N9gQDJummotBMBPqY31zZA7TF 8B8Qv21rWMtAW2YvmJKRYqNsOmy9HioTo1b4j7eqVXVCjt88vTUB69Y X-Developer-Key: i=krishna.chundru@oss.qualcomm.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-Authority-Analysis: v=2.4 cv=HP/DFptv c=1 sm=1 tr=0 ts=67d2c44f cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=Vs1iUdzkB0EA:10 a=EUspDBNiAAAA:8 a=kXhGf0cxdCgfIYue-YsA:9 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-ORIG-GUID: 5VG_k9i6xZOB22Fm0wZOdUPi_jEQq-4O X-Proofpoint-GUID: 5VG_k9i6xZOB22Fm0wZOdUPi_jEQq-4O X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1093,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-03-13_05,2025-03-11_02,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 mlxlogscore=999 clxscore=1015 priorityscore=1501 adultscore=0 impostorscore=0 malwarescore=0 spamscore=0 suspectscore=0 phishscore=0 lowpriorityscore=0 mlxscore=0 classifier=spam authscore=0 authtc=n/a authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2503130092 Add support for pre_scale_bus_bw() & post_scale_bus_bw() function op's. Add support for DWC glue drivers to register for these ops. Signed-off-by: Krishna Chaitanya Chundru --- drivers/pci/controller/dwc/pcie-designware-host.c | 21 +++++++++++++++++++++ drivers/pci/controller/dwc/pcie-designware.h | 2 ++ 2 files changed, 23 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index ffaded8f2df7..4da4df62c3f8 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -697,10 +697,31 @@ void __iomem *dw_pcie_own_conf_map_bus(struct pci_bus *bus, unsigned int devfn, } EXPORT_SYMBOL_GPL(dw_pcie_own_conf_map_bus); +static int dw_pcie_pre_scale_bus_bw(struct pci_bus *bus, int target_speed) +{ + struct dw_pcie_rp *pp = bus->sysdata; + int ret = 0; + + if (pp->ops->pre_scale_bus_bw) + ret = pp->ops->pre_scale_bus_bw(pp, target_speed); + + return ret; +} + +static void dw_pcie_post_scale_bus_bw(struct pci_bus *bus, int current_speed) +{ + struct dw_pcie_rp *pp = bus->sysdata; + + if (pp->ops->pre_scale_bus_bw) + pp->ops->post_scale_bus_bw(pp, current_speed); +} + static struct pci_ops dw_pcie_ops = { .map_bus = dw_pcie_own_conf_map_bus, .read = pci_generic_config_read, .write = pci_generic_config_write, + .pre_scale_bus_bw = dw_pcie_pre_scale_bus_bw, + .post_scale_bus_bw = dw_pcie_post_scale_bus_bw, }; static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 501d9ddfea16..16e02646a8b4 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -354,6 +354,8 @@ struct dw_pcie_host_ops { void (*post_init)(struct dw_pcie_rp *pp); int (*msi_init)(struct dw_pcie_rp *pp); void (*pme_turn_off)(struct dw_pcie_rp *pp); + int (*pre_scale_bus_bw)(struct dw_pcie_rp *pp, int target_speed); + void (*post_scale_bus_bw)(struct dw_pcie_rp *pp, int current_speed); }; struct dw_pcie_rp {