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| author | Makarand Pawagi <makarand.pawagi@nxp.com> | 2020-06-19 09:20:13 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-07-28 15:51:32 +0100 |
| commit | 6305166c8771c33a8d5992fb53f93cfecedc14fd (patch) | |
| tree | 27e0e5f22835ff27f868e0e88c7c941e3911d610 /drivers/bus/fsl-mc/fsl-mc-msi.c | |
| parent | 998fb7badf0362a2057694878098642ef363d899 (diff) | |
| download | lwn-6305166c8771c33a8d5992fb53f93cfecedc14fd.tar.gz lwn-6305166c8771c33a8d5992fb53f93cfecedc14fd.zip | |
bus: fsl-mc: Add ACPI support for fsl-mc
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>
Link: https://lore.kernel.org/r/20200619082013.13661-13-lorenzo.pieralisi@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers/bus/fsl-mc/fsl-mc-msi.c')
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-msi.c | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/drivers/bus/fsl-mc/fsl-mc-msi.c b/drivers/bus/fsl-mc/fsl-mc-msi.c index e7bbff445a83..8edadf05cbb7 100644 --- a/drivers/bus/fsl-mc/fsl-mc-msi.c +++ b/drivers/bus/fsl-mc/fsl-mc-msi.c @@ -13,6 +13,7 @@ #include <linux/irq.h> #include <linux/irqdomain.h> #include <linux/msi.h> +#include <linux/acpi_iort.h> #include "fsl-mc-private.h" @@ -179,25 +180,31 @@ struct irq_domain *fsl_mc_msi_create_irq_domain(struct fwnode_handle *fwnode, struct irq_domain *fsl_mc_find_msi_domain(struct device *dev) { - struct irq_domain *msi_domain = NULL; + struct device *root_dprc_dev; + struct device *bus_dev; + struct irq_domain *msi_domain; struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); - msi_domain = of_msi_map_get_device_domain(dev, mc_dev->icid, + fsl_mc_get_root_dprc(dev, &root_dprc_dev); + bus_dev = root_dprc_dev->parent; + + if (bus_dev->of_node) { + msi_domain = of_msi_map_get_device_domain(dev, + mc_dev->icid, DOMAIN_BUS_FSL_MC_MSI); - /* - * if the msi-map property is missing assume that all the - * child containers inherit the domain from the parent - */ - if (!msi_domain) { - struct device *root_dprc_dev; - struct device *bus_dev; - - fsl_mc_get_root_dprc(dev, &root_dprc_dev); - bus_dev = root_dprc_dev->parent; - msi_domain = of_msi_get_domain(bus_dev, - bus_dev->of_node, - DOMAIN_BUS_FSL_MC_MSI); + /* + * if the msi-map property is missing assume that all the + * child containers inherit the domain from the parent + */ + if (!msi_domain) + + msi_domain = of_msi_get_domain(bus_dev, + bus_dev->of_node, + DOMAIN_BUS_FSL_MC_MSI); + } else { + msi_domain = iort_get_device_domain(dev, mc_dev->icid, + DOMAIN_BUS_FSL_MC_MSI); } return msi_domain; |