Commit 6305166c authored by Makarand Pawagi's avatar Makarand Pawagi Committed by Catalin Marinas

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: default avatarMakarand Pawagi <makarand.pawagi@nxp.com>
Signed-off-by: default avatarDiana Craciun <diana.craciun@oss.nxp.com>
Signed-off-by: default avatarLaurentiu Tudor <laurentiu.tudor@nxp.com>
Link: https://lore.kernel.org/r/20200619082013.13661-13-lorenzo.pieralisi@arm.comSigned-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
parent 998fb7ba
......@@ -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;
return 0;
error_cleanup_mc_io:
......@@ -967,11 +997,18 @@ static const struct of_device_id fsl_mc_bus_match_table[] = {
MODULE_DEVICE_TABLE(of, fsl_mc_bus_match_table);
static const struct acpi_device_id fsl_mc_bus_acpi_match_table[] = {
{"NXP0008", 0 },
{ }
};
MODULE_DEVICE_TABLE(acpi, fsl_mc_bus_acpi_match_table);
static struct platform_driver fsl_mc_bus_driver = {
.driver = {
.name = "fsl_mc_bus",
.pm = NULL,
.of_match_table = fsl_mc_bus_match_table,
.acpi_match_table = fsl_mc_bus_acpi_match_table,
},
.probe = fsl_mc_bus_probe,
.remove = fsl_mc_bus_remove,
......
......@@ -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;
......
......@@ -7,6 +7,8 @@
*
*/
#include <linux/acpi.h>
#include <linux/acpi_iort.h>
#include <linux/of_device.h>
#include <linux/of_address.h>
#include <linux/irq.h>
......@@ -30,7 +32,8 @@ static u32 fsl_mc_msi_domain_get_msi_id(struct irq_domain *domain,
u32 out_id;
of_node = irq_domain_get_of_node(domain);
out_id = of_msi_map_id(&mc_dev->dev, of_node, mc_dev->icid);
out_id = of_node ? of_msi_map_id(&mc_dev->dev, of_node, mc_dev->icid) :
iort_msi_map_id(&mc_dev->dev, mc_dev->icid);
return out_id;
}
......@@ -79,12 +82,71 @@ static const struct of_device_id its_device_id[] = {
{},
};
static int __init its_fsl_mc_msi_init(void)
static void __init its_fsl_mc_msi_init_one(struct fwnode_handle *handle,
const char *name)
{
struct device_node *np;
struct irq_domain *parent;
struct irq_domain *mc_msi_domain;
parent = irq_find_matching_fwnode(handle, DOMAIN_BUS_NEXUS);
if (!parent || !msi_get_domain_info(parent)) {
pr_err("%s: unable to locate ITS domain\n", name);
return;
}
mc_msi_domain = fsl_mc_msi_create_irq_domain(handle,
&its_fsl_mc_msi_domain_info,
parent);
if (!mc_msi_domain) {
pr_err("%s: unable to create fsl-mc domain\n", name);
return;
}
pr_info("fsl-mc MSI: %s domain created\n", name);
}
#ifdef CONFIG_ACPI
static int __init
its_fsl_mc_msi_parse_madt(union acpi_subtable_headers *header,
const unsigned long end)
{
struct acpi_madt_generic_translator *its_entry;
struct fwnode_handle *dom_handle;
const char *node_name;
int err = 0;
its_entry = (struct acpi_madt_generic_translator *)header;
node_name = kasprintf(GFP_KERNEL, "ITS@0x%lx",
(long)its_entry->base_address);
dom_handle = iort_find_domain_token(its_entry->translation_id);
if (!dom_handle) {
pr_err("%s: Unable to locate ITS domain handle\n", node_name);
err = -ENXIO;
goto out;
}
its_fsl_mc_msi_init_one(dom_handle, node_name);
out:
kfree(node_name);
return err;
}
static void __init its_fsl_mc_acpi_msi_init(void)
{
acpi_table_parse_madt(ACPI_MADT_TYPE_GENERIC_TRANSLATOR,
its_fsl_mc_msi_parse_madt, 0);
}
#else
static inline void its_fsl_mc_acpi_msi_init(void) { }
#endif
static void __init its_fsl_mc_of_msi_init(void)
{
struct device_node *np;
for (np = of_find_matching_node(NULL, its_device_id); np;
np = of_find_matching_node(np, its_device_id)) {
if (!of_device_is_available(np))
......@@ -92,23 +154,15 @@ static int __init its_fsl_mc_msi_init(void)
if (!of_property_read_bool(np, "msi-controller"))
continue;
parent = irq_find_matching_host(np, DOMAIN_BUS_NEXUS);
if (!parent || !msi_get_domain_info(parent)) {
pr_err("%pOF: unable to locate ITS domain\n", np);
continue;
}
mc_msi_domain = fsl_mc_msi_create_irq_domain(
of_node_to_fwnode(np),
&its_fsl_mc_msi_domain_info,
parent);
if (!mc_msi_domain) {
pr_err("%pOF: unable to create fsl-mc domain\n", np);
continue;
}
pr_info("fsl-mc MSI: %pOF domain created\n", np);
its_fsl_mc_msi_init_one(of_node_to_fwnode(np),
np->full_name);
}
}
static int __init its_fsl_mc_msi_init(void)
{
its_fsl_mc_of_msi_init();
its_fsl_mc_acpi_msi_init();
return 0;
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment