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From: Sean V Kelley <sean.v.kelley@intel.com>
To: bhelgaas@google.com, Jonathan.Cameron@huawei.com,
	xerces.zhao@gmail.com, rafael.j.wysocki@intel.com,
	ashok.raj@intel.com, tony.luck@intel.com,
	sathyanarayanan.kuppuswamy@intel.com, qiuxu.zhuo@intel.com
Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org,
	Sean V Kelley <sean.v.kelley@intel.com>
Subject: [PATCH v12 14/15] PCI/PME: Add pcie_walk_rcec() to RCEC PME handling
Date: Fri, 20 Nov 2020 16:10:35 -0800	[thread overview]
Message-ID: <20201121001036.8560-15-sean.v.kelley@intel.com> (raw)
In-Reply-To: <20201121001036.8560-1-sean.v.kelley@intel.com>

Root Complex Event Collectors (RCEC) appear as peers of Root Ports and also
have the PME capability. As with AER, there is a need to be able to walk
the RCiEPs associated with their RCEC for purposes of acting upon them with
callbacks.

Add RCEC support through the use of pcie_walk_rcec() to the current PME
service driver and attach the PME service driver to the RCEC device.

Co-developed-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Link: https://lore.kernel.org/r/20201002184735.1229220-14-seanvk.dev@oregontracks.org
Signed-off-by: Qiuxu Zhuo <qiuxu.zhuo@intel.com>
Signed-off-by: Sean V Kelley <sean.v.kelley@intel.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
---
 drivers/pci/pcie/pme.c          | 16 ++++++++++++----
 drivers/pci/pcie/portdrv_core.c |  9 +++------
 2 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
index 6a32970bb731..3fc08488d65f 100644
--- a/drivers/pci/pcie/pme.c
+++ b/drivers/pci/pcie/pme.c
@@ -310,7 +310,10 @@ static int pcie_pme_can_wakeup(struct pci_dev *dev, void *ign)
 static void pcie_pme_mark_devices(struct pci_dev *port)
 {
 	pcie_pme_can_wakeup(port, NULL);
-	if (port->subordinate)
+
+	if (pci_pcie_type(port) == PCI_EXP_TYPE_RC_EC)
+		pcie_walk_rcec(port, pcie_pme_can_wakeup, NULL);
+	else if (port->subordinate)
 		pci_walk_bus(port->subordinate, pcie_pme_can_wakeup, NULL);
 }
 
@@ -320,10 +323,16 @@ static void pcie_pme_mark_devices(struct pci_dev *port)
  */
 static int pcie_pme_probe(struct pcie_device *srv)
 {
-	struct pci_dev *port;
+	struct pci_dev *port = srv->port;
 	struct pcie_pme_service_data *data;
+	int type = pci_pcie_type(port);
 	int ret;
 
+	/* Limit to Root Ports or Root Complex Event Collectors */
+	if (type != PCI_EXP_TYPE_RC_EC &&
+	    type != PCI_EXP_TYPE_ROOT_PORT)
+		return -ENODEV;
+
 	data = kzalloc(sizeof(*data), GFP_KERNEL);
 	if (!data)
 		return -ENOMEM;
@@ -333,7 +342,6 @@ static int pcie_pme_probe(struct pcie_device *srv)
 	data->srv = srv;
 	set_service_data(srv, data);
 
-	port = srv->port;
 	pcie_pme_interrupt_enable(port, false);
 	pcie_clear_root_pme_status(port);
 
@@ -445,7 +453,7 @@ static void pcie_pme_remove(struct pcie_device *srv)
 
 static struct pcie_port_service_driver pcie_pme_driver = {
 	.name		= "pcie_pme",
-	.port_type	= PCI_EXP_TYPE_ROOT_PORT,
+	.port_type	= PCIE_ANY_PORT,
 	.service	= PCIE_PORT_SERVICE_PME,
 
 	.probe		= pcie_pme_probe,
diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c
index 50a9522ab07d..e1fed6649c41 100644
--- a/drivers/pci/pcie/portdrv_core.c
+++ b/drivers/pci/pcie/portdrv_core.c
@@ -233,12 +233,9 @@ static int get_port_device_capability(struct pci_dev *dev)
 	}
 #endif
 
-	/*
-	 * Root ports are capable of generating PME too.  Root Complex
-	 * Event Collectors can also generate PMEs, but we don't handle
-	 * those yet.
-	 */
-	if (pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT &&
+	/* Root Ports and Root Complex Event Collectors may generate PMEs */
+	if ((pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT ||
+	     pci_pcie_type(dev) == PCI_EXP_TYPE_RC_EC) &&
 	    (pcie_ports_native || host->native_pme)) {
 		services |= PCIE_PORT_SERVICE_PME;
 
-- 
2.29.2


  parent reply	other threads:[~2020-11-21  0:11 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-21  0:10 [PATCH v12 00/15] Add RCEC handling to PCI/AER Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 01/15] AER: aer_root_reset() non-native handling Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 02/15] PCI/RCEC: Bind RCEC devices to the Root Port driver Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 03/15] PCI/RCEC: Cache RCEC capabilities in pci_init_capabilities() Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 04/15] PCI/ERR: Rename reset_link() to reset_subordinates() Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 05/15] PCI/ERR: Simplify by using pci_upstream_bridge() Sean V Kelley
2020-12-03 18:45   ` Kelley, Sean V
2020-12-03 22:25     ` Bjorn Helgaas
2020-11-21  0:10 ` [PATCH v12 06/15] PCI/ERR: Simplify by computing pci_pcie_type() once Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 07/15] PCI/ERR: Use "bridge" for clarity in pcie_do_recovery() Sean V Kelley
2020-12-02 23:18   ` Bjorn Helgaas
2020-11-21  0:10 ` [PATCH v12 08/15] PCI/ERR: Avoid negated conditional for clarity Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 09/15] PCI/ERR: Add pci_walk_bridge() to pcie_do_recovery() Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 10/15] PCI/ERR: Limit AER resets in pcie_do_recovery() Sean V Kelley
2020-11-23 23:28   ` Bjorn Helgaas
2020-11-23 23:57     ` Kelley, Sean V
2020-11-24 17:17       ` Bjorn Helgaas
2020-11-30 19:54         ` Kelley, Sean V
2020-12-01  0:25           ` Bjorn Helgaas
2020-12-01  1:09             ` Kuppuswamy, Sathyanarayanan
2020-12-01  1:13             ` Kelley, Sean V
2020-12-02 20:53             ` Kelley, Sean V
2020-12-02 21:27               ` Bjorn Helgaas
2020-12-02 22:54                 ` Kelley, Sean V
2020-11-21  0:10 ` [PATCH v12 11/15] PCI/RCEC: Add pcie_link_rcec() to associate RCiEPs Sean V Kelley
2020-11-21  0:10 ` [PATCH v12 12/15] PCI/RCEC: Add RCiEP's linked RCEC to AER/ERR Sean V Kelley
2020-12-02 23:44   ` Bjorn Helgaas
2020-12-03  0:51     ` Kelley, Sean V
2020-12-04  0:01       ` Bjorn Helgaas
2020-12-04 17:17         ` Kelley, Sean V
2020-12-04 17:24           ` Bjorn Helgaas
2020-12-05 21:30           ` Bjorn Helgaas
2020-12-07 17:23             ` Kelley, Sean V
2020-11-21  0:10 ` [PATCH v12 13/15] PCI/AER: Add pcie_walk_rcec() to RCEC AER handling Sean V Kelley
2020-11-21  0:10 ` Sean V Kelley [this message]
2020-11-21  0:10 ` [PATCH v12 15/15] PCI/AER: Add RCEC AER error injection support Sean V Kelley
2020-11-21  4:26 ` [PATCH v12 00/15] Add RCEC handling to PCI/AER Bjorn Helgaas

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