From: Makarand Pawagi <makarand.pawagi@nxp.com>
To: Laurentiu Tudor <laurentiu.tudor@nxp.com>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
Sudeep Holla <sudeep.holla@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
Hanjun Guo <guohanjun@huawei.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
Rob Herring <robh+dt@kernel.org>, Marc Zyngier <maz@kernel.org>,
"Diana Madalina Craciun \(OSS\)" <diana.craciun@oss.nxp.com>,
Bjorn Helgaas <bhelgaas@google.com>,
Robin Murphy <robin.murphy@arm.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: RE: [EXT] Re: [PATCH v2 12/12] bus: fsl-mc: Add ACPI support for fsl-mc
Date: Thu, 9 Jul 2020 10:37:47 +0000 [thread overview]
Message-ID: <DB7PR04MB4986C63772CB47A2A827D028EB640@DB7PR04MB4986.eurprd04.prod.outlook.com> (raw)
In-Reply-To: <203372be-144c-54ba-d011-30d0746dd615@nxp.com>
> -----Original Message-----
> From: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> Sent: Thursday, July 9, 2020 3:45 PM
> To: Makarand Pawagi <makarand.pawagi@nxp.com>; Lorenzo Pieralisi
> <lorenzo.pieralisi@arm.com>
> Cc: linux-arm-kernel@lists.infradead.org; Diana Madalina Craciun (OSS)
> <diana.craciun@oss.nxp.com>; iommu@lists.linux-foundation.org; linux-
> acpi@vger.kernel.org; devicetree@vger.kernel.org; linux-pci@vger.kernel.org;
> Rob Herring <robh+dt@kernel.org>; Rafael J. Wysocki <rjw@rjwysocki.net>;
> Joerg Roedel <joro@8bytes.org>; Hanjun Guo <guohanjun@huawei.com>; Bjorn
> Helgaas <bhelgaas@google.com>; Sudeep Holla <sudeep.holla@arm.com>;
> Robin Murphy <robin.murphy@arm.com>; Catalin Marinas
> <catalin.marinas@arm.com>; Will Deacon <will@kernel.org>; Marc Zyngier
> <maz@kernel.org>
> Subject: Re: [EXT] Re: [PATCH v2 12/12] bus: fsl-mc: Add ACPI support for fsl-mc
>
>
>
> On 7/9/2020 12:26 PM, Makarand Pawagi wrote:
> >
> >
> >> -----Original Message-----
> >> From: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> >> Sent: Thursday, July 9, 2020 2:50 PM
> >> To: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> >> Cc: linux-arm-kernel@lists.infradead.org; Makarand Pawagi
> >> <makarand.pawagi@nxp.com>; Diana Madalina Craciun (OSS)
> >> <diana.craciun@oss.nxp.com>; iommu@lists.linux-foundation.org; linux-
> >> acpi@vger.kernel.org; devicetree@vger.kernel.org;
> >> linux-pci@vger.kernel.org; Rob Herring <robh+dt@kernel.org>; Rafael
> >> J. Wysocki <rjw@rjwysocki.net>; Joerg Roedel <joro@8bytes.org>;
> >> Hanjun Guo <guohanjun@huawei.com>; Bjorn Helgaas
> >> <bhelgaas@google.com>; Sudeep Holla <sudeep.holla@arm.com>; Robin
> >> Murphy <robin.murphy@arm.com>; Catalin Marinas
> >> <catalin.marinas@arm.com>; Will Deacon <will@kernel.org>; Marc
> >> Zyngier <maz@kernel.org>
> >> Subject: [EXT] Re: [PATCH v2 12/12] bus: fsl-mc: Add ACPI support for
> >> fsl-mc
> >>
> >> Caution: EXT Email
> >>
> >> On Wed, Jul 01, 2020 at 07:55:28PM +0300, Laurentiu Tudor wrote:
> >>>
> >>>
> >>> On 6/19/2020 11:20 AM, Lorenzo Pieralisi wrote:
> >>>> From: Makarand Pawagi <makarand.pawagi@nxp.com>
> >>>>
> >>>> Add ACPI support in the fsl-mc driver. Driver parses MC DSDT table
> >>>> to extract memory and other resources.
> >>>>
> >>>> Interrupt (GIC ITS) information is extracted from the MADT table by
> >>>> drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c.
> >>>>
> >>>> IORT table is parsed to configure DMA.
> >>>>
> >>>> Signed-off-by: Makarand Pawagi <makarand.pawagi@nxp.com>
> >>>> Signed-off-by: Diana Craciun <diana.craciun@oss.nxp.com>
> >>>> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> >>>> ---
> >>>> drivers/bus/fsl-mc/fsl-mc-bus.c | 73 ++++++++++++----
> >>>> drivers/bus/fsl-mc/fsl-mc-msi.c | 37 +++++----
> >>>> drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 92
> >>>> ++++++++++++++++-----
> >>>> 3 files changed, 150 insertions(+), 52 deletions(-)
> >>>>
> >>>> diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c
> >>>> b/drivers/bus/fsl-mc/fsl-mc-bus.c index 824ff77bbe86..324d49d6df89
> >>>> 100644
> >>>> --- a/drivers/bus/fsl-mc/fsl-mc-bus.c
> >>>> +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c
> >>>> @@ -18,6 +18,8 @@
> >>>> #include <linux/bitops.h>
> >>>> #include <linux/msi.h>
> >>>> #include <linux/dma-mapping.h>
> >>>> +#include <linux/acpi.h>
> >>>> +#include <linux/iommu.h>
> >>>>
> >>>> #include "fsl-mc-private.h"
> >>>>
> >>>> @@ -38,6 +40,7 @@ struct fsl_mc {
> >>>> struct fsl_mc_device *root_mc_bus_dev;
> >>>> u8 num_translation_ranges;
> >>>> struct fsl_mc_addr_translation_range *translation_ranges;
> >>>> + void *fsl_mc_regs;
> >>>> };
> >>>>
> >>>> /**
> >>>> @@ -56,6 +59,10 @@ struct fsl_mc_addr_translation_range {
> >>>> phys_addr_t start_phys_addr;
> >>>> };
> >>>>
> >>>> +#define FSL_MC_FAPR 0x28
> >>>> +#define MC_FAPR_PL BIT(18)
> >>>> +#define MC_FAPR_BMT BIT(17)
> >>>> +
> >>>> /**
> >>>> * fsl_mc_bus_match - device to driver matching callback
> >>>> * @dev: the fsl-mc device to match against @@ -124,7 +131,10 @@
> >>>> static int fsl_mc_dma_configure(struct device *dev)
> >>>> while (dev_is_fsl_mc(dma_dev))
> >>>> dma_dev = dma_dev->parent;
> >>>>
> >>>> - return of_dma_configure_id(dev, dma_dev->of_node, 0, &input_id);
> >>>> + if (dev_of_node(dma_dev))
> >>>> + return of_dma_configure_id(dev, dma_dev->of_node, 0,
> >>>> + &input_id);
> >>>> +
> >>>> + return acpi_dma_configure_id(dev, DEV_DMA_COHERENT, &input_id);
> >>>> }
> >>>>
> >>>> static ssize_t modalias_show(struct device *dev, struct
> >>>> device_attribute *attr, @@ -865,8 +875,11 @@ static int
> >> fsl_mc_bus_probe(struct platform_device *pdev)
> >>>> struct fsl_mc_io *mc_io = NULL;
> >>>> int container_id;
> >>>> phys_addr_t mc_portal_phys_addr;
> >>>> - u32 mc_portal_size;
> >>>> - struct resource res;
> >>>> + u32 mc_portal_size, mc_stream_id;
> >>>> + struct resource *plat_res;
> >>>> +
> >>>> + if (!iommu_present(&fsl_mc_bus_type))
> >>>> + return -EPROBE_DEFER;
> >>>>
> >>>> mc = devm_kzalloc(&pdev->dev, sizeof(*mc), GFP_KERNEL);
> >>>> if (!mc)
> >>>> @@ -874,19 +887,33 @@ static int fsl_mc_bus_probe(struct
> >>>> platform_device *pdev)
> >>>>
> >>>> platform_set_drvdata(pdev, mc);
> >>>>
> >>>> + plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
> >>>> + mc->fsl_mc_regs = devm_ioremap_resource(&pdev->dev, plat_res);
> >>>> + if (IS_ERR(mc->fsl_mc_regs))
> >>>> + return PTR_ERR(mc->fsl_mc_regs);
> >>>> +
> >>>> + if (IS_ENABLED(CONFIG_ACPI) && !dev_of_node(&pdev->dev)) {
> >>>> + mc_stream_id = readl(mc->fsl_mc_regs + FSL_MC_FAPR);
> >>>> + /*
> >>>> + * HW ORs the PL and BMT bit, places the result in bit 15 of
> >>>> + * the StreamID and ORs in the ICID. Calculate it accordingly.
> >>>> + */
> >>>> + mc_stream_id = (mc_stream_id & 0xffff) |
> >>>> + ((mc_stream_id & (MC_FAPR_PL | MC_FAPR_BMT)) ?
> >>>> + 0x4000 : 0);
> >>>> + error = acpi_dma_configure_id(&pdev->dev, DEV_DMA_COHERENT,
> >>>> + &mc_stream_id);
> >>>> + if (error)
> >>>> + dev_warn(&pdev->dev, "failed to configure dma: %d.\n",
> >>>> + error);
> >>>> + }
> >>>> +
> >>>> /*
> >>>> * Get physical address of MC portal for the root DPRC:
> >>>> */
> >>>> - error = of_address_to_resource(pdev->dev.of_node, 0, &res);
> >>>> - if (error < 0) {
> >>>> - dev_err(&pdev->dev,
> >>>> - "of_address_to_resource() failed for %pOF\n",
> >>>> - pdev->dev.of_node);
> >>>> - return error;
> >>>> - }
> >>>> -
> >>>> - mc_portal_phys_addr = res.start;
> >>>> - mc_portal_size = resource_size(&res);
> >>>> + plat_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> >>>> + mc_portal_phys_addr = plat_res->start;
> >>>> + mc_portal_size = resource_size(plat_res);
> >>>> error = fsl_create_mc_io(&pdev->dev, mc_portal_phys_addr,
> >>>> mc_portal_size, NULL,
> >>>> FSL_MC_IO_ATOMIC_CONTEXT_PORTAL,
> >>>> &mc_io); @@ -903,11 +930,13 @@ static int fsl_mc_bus_probe(struct
> >> platform_device *pdev)
> >>>> dev_info(&pdev->dev, "MC firmware version: %u.%u.%u\n",
> >>>> mc_version.major, mc_version.minor,
> >>>> mc_version.revision);
> >>>>
> >>>> - error = get_mc_addr_translation_ranges(&pdev->dev,
> >>>> - &mc->translation_ranges,
> >>>> - &mc->num_translation_ranges);
> >>>> - if (error < 0)
> >>>> - goto error_cleanup_mc_io;
> >>>> + if (dev_of_node(&pdev->dev)) {
> >>>> + error = get_mc_addr_translation_ranges(&pdev->dev,
> >>>> + &mc->translation_ranges,
> >>>> + &mc->num_translation_ranges);
> >>>> + if (error < 0)
> >>>> + goto error_cleanup_mc_io;
> >>>> + }
> >>>>
> >>>> error = dprc_get_container_id(mc_io, 0, &container_id);
> >>>> if (error < 0) {
> >>>> @@ -934,6 +963,7 @@ static int fsl_mc_bus_probe(struct
> >>>> platform_device
> >> *pdev)
> >>>> goto error_cleanup_mc_io;
> >>>>
> >>>> mc->root_mc_bus_dev = mc_bus_dev;
> >>>> + mc_bus_dev->dev.fwnode = pdev->dev.fwnode;
> >>>
> >>> Makarand, this looks a bit weird. Is there really a reason for it?
> >>
> >> Can you clarify please so that we can reach a conclusion on this matter ?
> >>
> > Laurentiu, can you clarify what exactly is the doubt here? Are you asking about
> fwnode assignment from pdev to mc_bus_dev?
> >
>
> Yes. I remember that a while ago I tested without this fwnode assignment and
> didn't encounter any issues. Maybe we can just drop it?
Did you tested with PHY changes? Because this is needed for MAC driver, where it needs the mc bus node.
>
> ---
> Best Regards, Laurentiu
_______________________________________________
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next prev parent reply other threads:[~2020-07-09 10:53 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-21 12:59 [PATCH 00/12] ACPI/OF: Upgrade MSI/IOMMU ID mapping APIs Lorenzo Pieralisi
2020-05-21 12:59 ` [PATCH 01/12] ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC Lorenzo Pieralisi
2020-05-21 12:59 ` [PATCH 02/12] ACPI/IORT: Make iort_get_device_domain IRQ domain agnostic Lorenzo Pieralisi
2020-05-21 19:56 ` Bjorn Helgaas
2020-05-21 12:59 ` [PATCH 03/12] ACPI/IORT: Make iort_msi_map_rid() PCI agnostic Lorenzo Pieralisi
2020-05-21 13:00 ` [PATCH 04/12] ACPI/IORT: Remove useless PCI bus walk Lorenzo Pieralisi
2020-05-21 13:00 ` [PATCH 05/12] ACPI/IORT: Add an input ID to acpi_dma_configure() Lorenzo Pieralisi
2020-05-21 13:00 ` [PATCH 06/12] of/iommu: Make of_map_rid() PCI agnostic Lorenzo Pieralisi
2020-05-21 22:47 ` Rob Herring
2020-06-04 14:27 ` Lorenzo Pieralisi
2020-05-21 13:00 ` [PATCH 07/12] of/device: Add input id to of_dma_configure() Lorenzo Pieralisi
2020-05-21 23:02 ` Rob Herring
2020-06-04 14:49 ` Lorenzo Pieralisi
2020-05-21 13:00 ` [PATCH 08/12] of/irq: make of_msi_map_get_device_domain() bus agnostic Lorenzo Pieralisi
2020-05-21 19:57 ` Bjorn Helgaas
2020-05-21 13:00 ` [PATCH 09/12] dt-bindings: arm: fsl: Add msi-map device-tree binding for fsl-mc bus Lorenzo Pieralisi
2020-05-21 23:10 ` Rob Herring
2020-05-22 9:42 ` Robin Murphy
2020-05-22 9:57 ` Diana Craciun OSS
2020-05-22 14:08 ` Rob Herring
2020-05-22 14:34 ` Robin Murphy
2020-05-22 14:02 ` Rob Herring
2020-05-22 15:38 ` Laurentiu Tudor
2020-05-21 13:00 ` [PATCH 10/12] of/irq: Make of_msi_map_rid() PCI bus agnostic Lorenzo Pieralisi
2020-05-21 23:17 ` Rob Herring
2020-06-04 15:08 ` Lorenzo Pieralisi
2020-05-21 13:00 ` [PATCH 11/12] bus/fsl-mc: Refactor the MSI domain creation in the DPRC driver Lorenzo Pieralisi
2020-05-21 13:00 ` [PATCH 12/12] bus: fsl-mc: Add ACPI support for fsl-mc Lorenzo Pieralisi
2020-05-21 15:03 ` Laurentiu Tudor
2020-05-22 5:32 ` Makarand Pawagi
2020-05-22 9:53 ` Lorenzo Pieralisi
2020-06-19 8:20 ` [PATCH v2 00/12] ACPI/OF: Upgrade MSI/IOMMU ID mapping APIs Lorenzo Pieralisi
2020-06-19 8:20 ` [PATCH v2 01/12] ACPI/IORT: Make iort_match_node_callback walk the ACPI namespace for NC Lorenzo Pieralisi
2020-06-29 4:24 ` Hanjun Guo
2020-06-29 9:05 ` Lorenzo Pieralisi
2020-06-30 3:06 ` Hanjun Guo
2020-06-30 10:24 ` Lorenzo Pieralisi
2020-06-30 13:04 ` Hanjun Guo
2020-07-01 16:12 ` Robin Murphy
2020-07-02 8:22 ` Hanjun Guo
2020-07-09 9:21 ` Lorenzo Pieralisi
2020-07-09 12:48 ` Hanjun Guo
2020-08-18 0:49 ` Hanjun Guo
2020-06-19 8:20 ` [PATCH v2 02/12] ACPI/IORT: Make iort_get_device_domain IRQ domain agnostic Lorenzo Pieralisi
2020-06-19 8:20 ` [PATCH v2 03/12] ACPI/IORT: Make iort_msi_map_rid() PCI agnostic Lorenzo Pieralisi
2020-07-15 9:15 ` Lorenzo Pieralisi
2020-07-21 14:59 ` Bjorn Helgaas
2020-07-27 6:06 ` [EXT] " Makarand Pawagi
2020-06-19 8:20 ` [PATCH v2 04/12] ACPI/IORT: Remove useless PCI bus walk Lorenzo Pieralisi
2020-06-19 8:20 ` [PATCH v2 05/12] ACPI/IORT: Add an input ID to acpi_dma_configure() Lorenzo Pieralisi
2020-07-09 9:35 ` Lorenzo Pieralisi
2020-07-15 9:13 ` Lorenzo Pieralisi
2020-07-28 12:48 ` Lorenzo Pieralisi
2020-07-28 13:00 ` Rafael J. Wysocki
2020-06-19 8:20 ` [PATCH v2 06/12] of/iommu: Make of_map_rid() PCI agnostic Lorenzo Pieralisi
2020-06-22 13:26 ` Joerg Roedel
2020-07-13 23:57 ` Rob Herring
2020-06-19 8:20 ` [PATCH v2 07/12] of/device: Add input id to of_dma_configure() Lorenzo Pieralisi
2020-06-30 21:50 ` Rob Herring
2020-06-19 8:20 ` [PATCH v2 08/12] dt-bindings: arm: fsl: Add msi-map device-tree binding for fsl-mc bus Lorenzo Pieralisi
2020-06-30 21:55 ` Rob Herring
2020-06-19 8:20 ` [PATCH v2 09/12] of/irq: make of_msi_map_get_device_domain() bus agnostic Lorenzo Pieralisi
2020-06-30 21:50 ` Rob Herring
2020-06-19 8:20 ` [PATCH v2 10/12] of/irq: Make of_msi_map_rid() PCI " Lorenzo Pieralisi
2020-06-30 21:56 ` Rob Herring
2020-06-19 8:20 ` [PATCH v2 11/12] bus/fsl-mc: Refactor the MSI domain creation in the DPRC driver Lorenzo Pieralisi
2020-07-15 13:05 ` Marc Zyngier
2020-06-19 8:20 ` [PATCH v2 12/12] bus: fsl-mc: Add ACPI support for fsl-mc Lorenzo Pieralisi
2020-07-01 16:55 ` Laurentiu Tudor
2020-07-09 9:19 ` Lorenzo Pieralisi
2020-07-09 9:26 ` [EXT] " Makarand Pawagi
2020-07-09 10:14 ` Laurentiu Tudor
2020-07-09 10:37 ` Makarand Pawagi [this message]
2020-07-09 10:39 ` Laurentiu Tudor
2020-07-09 10:47 ` Diana Craciun OSS
2020-07-09 10:52 ` Makarand Pawagi
2020-07-15 10:06 ` Lorenzo Pieralisi
2020-07-16 3:23 ` Makarand Pawagi
2020-07-16 7:57 ` Marc Zyngier
2020-07-20 16:54 ` [PATCH v2 00/12] ACPI/OF: Upgrade MSI/IOMMU ID mapping APIs Lorenzo Pieralisi
2020-07-21 4:28 ` [EXT] " Makarand Pawagi
2020-07-28 17:01 ` Catalin Marinas
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