On 6/19/2020 11:20 AM, Lorenzo Pieralisi wrote:
> From: Makarand Pawagi <makarand.pawagi@xxxxxxx>
>
> 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@xxxxxxx>
> Signed-off-by: Diana Craciun <diana.craciun@xxxxxxxxxxx>
> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@xxxxxxx>
> ---
> 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?
---
Best Regards, Laurentiu
