linux-pci.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Marc Zyngier <maz@kernel.org>
To: Bharat Kumar Gogada <bharatku@xilinx.com>
Cc: "lorenzo.pieralisi@arm.com" <lorenzo.pieralisi@arm.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Frank Wunderlich <frank-w@public-files.de>,
	Thierry Reding <treding@nvidia.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Rob Herring <robh@kernel.org>, Will Deacon <will@kernel.org>,
	"K. Y. Srinivasan" <kys@microsoft.com>,
	Haiyang Zhang <haiyangz@microsoft.com>,
	Stephen Hemminger <sthemmin@microsoft.com>,
	Michael Kelley <mikelley@microsoft.com>,
	Wei Liu <wei.liu@kernel.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Ryder Lee <ryder.lee@mediatek.com>,
	Marek Vasut <marek.vasut+renesas@gmail.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>,
	Michal Simek <michals@xilinx.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-hyperv@vger.kernel.org" <linux-hyperv@vger.kernel.org>,
	"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
	"linux-mediatek@lists.infradead.org" 
	<linux-mediatek@lists.infradead.org>,
	"linux-renesas-soc@vger.kernel.org" 
	<linux-renesas-soc@vger.kernel.org>,
	"kernel-team@android.com" <kernel-team@android.com>
Subject: Re: [PATCH v2 05/15] PCI: xilinx: Convert to MSI domains
Date: Wed, 24 Mar 2021 13:15:38 +0000	[thread overview]
Message-ID: <877dlwk805.wl-maz@kernel.org> (raw)
In-Reply-To: <BYAPR02MB5559A0B0DA88866EDC7BDFE5A5639@BYAPR02MB5559.namprd02.prod.outlook.com>

On Wed, 24 Mar 2021 12:42:24 +0000,
Bharat Kumar Gogada <bharatku@xilinx.com> wrote:
> 
> Hi Marc,
> 
> Thanks for the patch. 
> 
> > Subject: [PATCH v2 05/15] PCI: xilinx: Convert to MSI domains
> > 
> > In anticipation of the removal of the msi_controller structure, convert the
> > ancient xilinx host controller driver to MSI domains.
> > 
> > We end-up with the usual two domain structure, the top one being a generic
> > PCI/MSI domain, the bottom one being xilinx-specific and handling the
> > actual HW interrupt allocation.
> > 
> > This allows us to fix some of the most appalling MSI programming, where the
> > message programmed in the device is the virtual IRQ number instead of the
> > allocated vector number. The allocator is also made safe with a mutex. This
> > should allow support for MultiMSI, but I decided not to even try, since I
> > cannot test it.
> > 
> > Acked-by: Bjorn Helgaas <bhelgaas@google.com>
> > Signed-off-by: Marc Zyngier <maz@kernel.org>
> > ---
> >  drivers/pci/controller/Kconfig       |   2 +-
> >  drivers/pci/controller/pcie-xilinx.c | 234 +++++++++++----------------
> >  2 files changed, 97 insertions(+), 139 deletions(-)
> > 
> > diff --git a/drivers/pci/controller/Kconfig b/drivers/pci/controller/Kconfig
> > index 5cc07d28a3a0..60045f7aafc5 100644
> ...
> 
> 
> > +static struct irq_chip xilinx_msi_bottom_chip = {
> > +	.name			= "Xilinx MSI",
> > +	.irq_set_affinity 	= xilinx_msi_set_affinity,
> > +	.irq_compose_msi_msg	= xilinx_compose_msi_msg,
> > +};
> > 
> I see a crash while testing MSI in handle_edge_irq
> [<c015bdd4>] (handle_edge_irq) from [<c0157164>] (generic_handle_irq+0x28/0x38)
> [<c0157164>] (generic_handle_irq) from [<c03a9714>] (xilinx_pcie_intr_handler+0x17c/0x2b0)
> [<c03a9714>] (xilinx_pcie_intr_handler) from [<c0157d94>] (__handle_irq_event_percpu+0x3c/0xc0)
> [<c0157d94>] (__handle_irq_event_percpu) from [<c0157e44>] (handle_irq_event_percpu+0x2c/0x7c)
> [<c0157e44>] (handle_irq_event_percpu) from [<c0157ecc>] (handle_irq_event+0x38/0x5c)
> [<c0157ecc>] (handle_irq_event) from [<c015bc8c>] (handle_fasteoi_irq+0x9c/0x114)

Thanks for that. Can you please try the following patch and let me
know if it helps?

Thanks,

	M.

diff --git a/drivers/pci/controller/pcie-xilinx.c b/drivers/pci/controller/pcie-xilinx.c
index ad9abf405167..14001febf59a 100644
--- a/drivers/pci/controller/pcie-xilinx.c
+++ b/drivers/pci/controller/pcie-xilinx.c
@@ -194,8 +194,18 @@ static struct pci_ops xilinx_pcie_ops = {
 
 /* MSI functions */
 
+static void xilinx_msi_top_irq_ack(struct irq_data *d)
+{
+	/*
+	 * xilinx_pcie_intr_handler() will have performed the Ack.
+	 * Eventually, this should be fixed and the Ack be moved in
+	 * the respective callbacks for INTx and MSI.
+	 */
+}
+
 static struct irq_chip xilinx_msi_top_chip = {
 	.name		= "PCIe MSI",
+	.irq_ack	= xilinx_msi_top_irq_ack,
 };
 
 static int xilinx_msi_set_affinity(struct irq_data *d, const struct cpumask *mask, bool force)
@@ -206,7 +216,7 @@ static int xilinx_msi_set_affinity(struct irq_data *d, const struct cpumask *mas
 static void xilinx_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
 {
 	struct xilinx_pcie_port *pcie = irq_data_get_irq_chip_data(data);
-	phys_addr_t pa = virt_to_phys(pcie);
+	phys_addr_t pa = ALIGN_DOWN(virt_to_phys(pcie), SZ_4K);
 
 	msg->address_lo = lower_32_bits(pa);
 	msg->address_hi = upper_32_bits(pa);
@@ -468,7 +478,7 @@ static int xilinx_pcie_init_irq_domain(struct xilinx_pcie_port *port)
 
 	/* Setup MSI */
 	if (IS_ENABLED(CONFIG_PCI_MSI)) {
-		phys_addr_t pa = virt_to_phys(port);
+		phys_addr_t pa = ALIGN_DOWN(virt_to_phys(port), SZ_4K);
 
 		ret = xilinx_allocate_msi_domains(port);
 		if (ret)

-- 
Without deviation from the norm, progress is not possible.

  reply	other threads:[~2021-03-24 13:16 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-22 18:45 [PATCH v2 00/15] PCI/MSI: Getting rid of msi_controller, and other cleanups Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 01/15] PCI: tegra: Convert to MSI domains Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 02/15] PCI: rcar: Don't allocate extra memory for the MSI capture address Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 03/15] PCI: rcar: Convert to MSI domains Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 04/15] PCI: xilinx: Don't allocate extra memory for the MSI capture address Marc Zyngier
2021-03-24 12:35   ` Bharat Kumar Gogada
2021-03-24 12:55     ` Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 05/15] PCI: xilinx: Convert to MSI domains Marc Zyngier
2021-03-24 12:42   ` Bharat Kumar Gogada
2021-03-24 13:15     ` Marc Zyngier [this message]
2021-03-24 13:56       ` Bharat Kumar Gogada
2021-03-24 14:45         ` Marc Zyngier
2021-03-25  4:13           ` Bharat Kumar Gogada
2021-03-22 18:46 ` [PATCH v2 06/15] PCI: hv: Drop msi_controller structure Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 07/15] PCI/MSI: Drop use of msi_controller from core code Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 08/15] PCI/MSI: Kill msi_controller structure Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 09/15] PCI/MSI: Kill default_teardown_msi_irqs() Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 10/15] PCI/MSI: Let PCI host bridges declare their lack of MSI handling Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 11/15] PCI: mediatek: Advertise " Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 12/15] PCI/MSI: Let PCI host bridges declare their reliance on MSI domains Marc Zyngier
2021-03-23 11:45   ` Robin Murphy
2021-03-23 18:09     ` Marc Zyngier
2021-03-23 19:04       ` Robin Murphy
2021-03-24 13:19       ` Lorenzo Pieralisi
2021-03-24 16:11         ` Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 13/15] PCI/MSI: Make pci_host_common_probe() declare its " Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 14/15] PCI/MSI: Document the various ways of ending up with NO_MSI Marc Zyngier
2021-03-22 18:46 ` [PATCH v2 15/15] PCI: Refactor HT advertising of NO_MSI flag Marc Zyngier

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=877dlwk805.wl-maz@kernel.org \
    --to=maz@kernel.org \
    --cc=bharatku@xilinx.com \
    --cc=bhelgaas@google.com \
    --cc=frank-w@public-files.de \
    --cc=haiyangz@microsoft.com \
    --cc=jonathanh@nvidia.com \
    --cc=kernel-team@android.com \
    --cc=kys@microsoft.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-hyperv@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-mediatek@lists.infradead.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=linux-renesas-soc@vger.kernel.org \
    --cc=linux-tegra@vger.kernel.org \
    --cc=lorenzo.pieralisi@arm.com \
    --cc=marek.vasut+renesas@gmail.com \
    --cc=michals@xilinx.com \
    --cc=mikelley@microsoft.com \
    --cc=paul.walmsley@sifive.com \
    --cc=robh@kernel.org \
    --cc=ryder.lee@mediatek.com \
    --cc=sthemmin@microsoft.com \
    --cc=tglx@linutronix.de \
    --cc=thierry.reding@gmail.com \
    --cc=treding@nvidia.com \
    --cc=wei.liu@kernel.org \
    --cc=will@kernel.org \
    --cc=yoshihiro.shimoda.uh@renesas.com \
    --subject='Re: [PATCH v2 05/15] PCI: xilinx: Convert to MSI domains' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).