From: "Kuppuswamy, Sathyanarayanan" <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Sean V Kelley <sean.v.kelley@intel.com>,
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
Subject: Re: [PATCH v11 15/16] PCI/PME: Add pcie_walk_rcec() to RCEC PME handling
Date: Tue, 17 Nov 2020 22:03:38 -0800 [thread overview]
Message-ID: <daef675b-a5b3-0973-e0a7-f4d0ed6dd7c8@linux.intel.com> (raw)
In-Reply-To: <20201117191954.1322844-16-sean.v.kelley@intel.com>
On 11/17/20 11:19 AM, Sean V Kelley wrote:
> 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 | 15 +++++++++++----
> drivers/pci/pcie/portdrv_core.c | 9 +++------
> 2 files changed, 14 insertions(+), 10 deletions(-)
>
> diff --git a/drivers/pci/pcie/pme.c b/drivers/pci/pcie/pme.c
> index 6a32970bb731..87799166c96a 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 +323,15 @@ 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 ret;
>
> + /* Limit to Root Ports or Root Complex Event Collectors */
> + if ((pci_pcie_type(port) != PCI_EXP_TYPE_RC_EC) &&
> + (pci_pcie_type(port) != PCI_EXP_TYPE_ROOT_PORT))
may be you can save the value pci_pcie_type(port)?
> + return -ENODEV;
> +
> data = kzalloc(sizeof(*data), GFP_KERNEL);
> if (!data)
> return -ENOMEM;
> @@ -333,7 +341,6 @@ 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 +452,7 @@ 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;
>
>
--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer
next prev parent reply other threads:[~2020-11-18 6:03 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-17 19:19 [PATCH v11 00/16] Add RCEC handling to PCI/AER Sean V Kelley
2020-11-17 19:19 ` [PATCH v11 01/16] AER: aer_root_reset() non-native handling Sean V Kelley
2020-11-17 20:04 ` Kuppuswamy, Sathyanarayanan
2020-11-17 19:19 ` [PATCH v11 02/16] PCI/RCEC: Add RCEC class code and extended capability Sean V Kelley
2020-11-17 20:07 ` Kuppuswamy, Sathyanarayanan
2020-11-17 22:39 ` Kelley, Sean V
2020-11-17 19:19 ` [PATCH v11 03/16] PCI/RCEC: Bind RCEC devices to the Root Port driver Sean V Kelley
2020-11-17 20:09 ` Kuppuswamy, Sathyanarayanan
2020-11-17 19:19 ` [PATCH v11 04/16] PCI/RCEC: Cache RCEC capabilities in pci_init_capabilities() Sean V Kelley
2020-11-17 19:19 ` [PATCH v11 05/16] PCI/ERR: Rename reset_link() to reset_subordinates() Sean V Kelley
2020-11-17 20:10 ` Kuppuswamy, Sathyanarayanan
2020-11-17 19:19 ` [PATCH v11 06/16] PCI/ERR: Simplify by using pci_upstream_bridge() Sean V Kelley
2020-11-17 20:11 ` Kuppuswamy, Sathyanarayanan
2020-11-17 19:19 ` [PATCH v11 07/16] PCI/ERR: Simplify by computing pci_pcie_type() once Sean V Kelley
2020-11-17 21:58 ` Kuppuswamy, Sathyanarayanan
2020-11-17 22:47 ` Kelley, Sean V
2020-11-17 19:19 ` [PATCH v11 08/16] PCI/ERR: Use "bridge" for clarity in pcie_do_recovery() Sean V Kelley
2020-11-17 21:59 ` Kuppuswamy, Sathyanarayanan
2020-11-17 19:19 ` [PATCH v11 09/16] PCI/ERR: Avoid negated conditional for clarity Sean V Kelley
2020-11-17 22:00 ` Kuppuswamy, Sathyanarayanan
2020-11-17 19:19 ` [PATCH v11 10/16] PCI/ERR: Add pci_walk_bridge() to pcie_do_recovery() Sean V Kelley
2020-11-17 19:19 ` [PATCH v11 11/16] PCI/ERR: Limit AER resets in pcie_do_recovery() Sean V Kelley
2020-11-17 19:19 ` [PATCH v11 12/16] PCI/RCEC: Add pcie_link_rcec() to associate RCiEPs Sean V Kelley
2020-11-17 19:19 ` [PATCH v11 13/16] PCI/RCEC: Add RCiEP's linked RCEC to AER/ERR Sean V Kelley
2020-11-17 19:19 ` [PATCH v11 14/16] PCI/AER: Add pcie_walk_rcec() to RCEC AER handling Sean V Kelley
2020-11-18 6:04 ` Kuppuswamy, Sathyanarayanan
2020-11-17 19:19 ` [PATCH v11 15/16] PCI/PME: Add pcie_walk_rcec() to RCEC PME handling Sean V Kelley
2020-11-18 6:03 ` Kuppuswamy, Sathyanarayanan [this message]
2020-11-18 16:11 ` Kelley, Sean V
2020-11-17 19:19 ` [PATCH v11 16/16] PCI/AER: Add RCEC AER error injection support Sean V Kelley
2020-11-18 6:02 ` Kuppuswamy, Sathyanarayanan
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