linux-4.4.1/arm_smmu_device_dt_probe()
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開始行:
*参照元 [#l13893d2]
#backlinks
*説明 [#s2d2470f]
-パス: [[linux-4.4.1/drivers/iommu/arm-smmu.c]]
-FIXME: これは何？
--説明
**引数 [#eb810a56]
-struct platform_device *pdev
--
--[[linux-4.4.1/platform_device]]
**返り値 [#leffecc6]
-int
--
**参考 [#i4ffb69c]
*実装 [#j085df4b]
static int arm_smmu_device_dt_probe(struct platform_devi...
{
const struct of_device_id *of_id;
struct resource *res;
struct arm_smmu_device *smmu;
struct device *dev = &pdev->dev;
struct rb_node *node;
struct of_phandle_args masterspec;
int num_irqs, i, err;
-
--[[linux-4.4.1/of_device_id]]
--[[linux-4.4.1/resource]]
--[[linux-4.4.1/arm_smmu_device]]
--[[linux-4.4.1/device]]
--[[linux-4.4.1/rb_node]]
--[[linux-4.4.1/of_phandle_args]]
smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL);
if (!smmu) {
dev_err(dev, "failed to allocate arm_smmu_device\n");
return -ENOMEM;
}
smmu->dev = dev;
-
--[[linux-4.4.1/devm_kzalloc()]]
--[[linux-4.4.1/dev_err()]]
of_id = of_match_node(arm_smmu_of_match, dev->of_node);
smmu->version = (enum arm_smmu_arch_version)of_id->data;
-
--[[linux-4.4.1/of_match_node()]]
--[[linux-4.4.1/arm_smmu_of_match(global)]]
--[[linux-4.4.1/arm_smmu_arch_version]]
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
smmu->base = devm_ioremap_resource(dev, res);
if (IS_ERR(smmu->base))
return PTR_ERR(smmu->base);
smmu->size = resource_size(res);
-
--[[linux-4.4.1/platform_get_resource()]]
--[[linux-4.4.1/devm_ioremap_resource()]]
--[[linux-4.4.1/IS_ERR()]]
--[[linux-4.4.1/PTR_ERR()]]
--[[linux-4.4.1/resource_size()]]
if (of_property_read_u32(dev->of_node, "#global-interru...
&smmu->num_global_irqs)) {
dev_err(dev, "missing #global-interrupts property\n");
return -ENODEV;
}
-
--[[linux-4.4.1/of_property_read_u32()]]
num_irqs = 0;
while ((res = platform_get_resource(pdev, IORESOURCE_IR...
num_irqs++;
if (num_irqs > smmu->num_global_irqs)
smmu->num_context_irqs++;
}
if (!smmu->num_context_irqs) {
dev_err(dev, "found %d interrupts but expected at leas...
num_irqs, smmu->num_global_irqs + 1);
return -ENODEV;
}
smmu->irqs = devm_kzalloc(dev, sizeof(*smmu->irqs) * nu...
GFP_KERNEL);
if (!smmu->irqs) {
dev_err(dev, "failed to allocate %d irqs\n", num_irqs);
return -ENOMEM;
}
for (i = 0; i < num_irqs; ++i) {
int irq = platform_get_irq(pdev, i);
if (irq < 0) {
dev_err(dev, "failed to get irq index %d\n", i);
return -ENODEV;
}
smmu->irqs[i] = irq;
}
-
--[[linux-4.4.1/platform_get_irq()]]
err = arm_smmu_device_cfg_probe(smmu);
if (err)
return err;
-
--[[linux-4.4.1/arm_smmu_device_cfg_probe()]]
i = 0;
smmu->masters = RB_ROOT;
while (!of_parse_phandle_with_args(dev->of_node, "mmu-m...
"#stream-id-cells", i,
&masterspec)) {
err = register_smmu_master(smmu, dev, &masterspec);
if (err) {
dev_err(dev, "failed to add master %s\n",
masterspec.np->name);
goto out_put_masters;
}
i++;
}
dev_notice(dev, "registered %d master devices\n", i);
-
--[[linux-4.4.1/of_parse_phandle_with_args()]]
--[[linux-4.4.1/masterspec(global)]]
--[[linux-4.4.1/register_smmu_master()]]
parse_driver_options(smmu);
-
--[[linux-4.4.1/parse_driver_options()]]
if (smmu->version > ARM_SMMU_V1 &&
smmu->num_context_banks != smmu->num_context_irqs) {
dev_err(dev,
"found only %d context interrupt(s) but %d required\n",
smmu->num_context_irqs, smmu->num_context_banks);
err = -ENODEV;
goto out_put_masters;
}
for (i = 0; i < smmu->num_global_irqs; ++i) {
err = request_irq(smmu->irqs[i],
arm_smmu_global_fault,
IRQF_SHARED,
"arm-smmu global fault",
smmu);
if (err) {
dev_err(dev, "failed to request global IRQ %d (%u)\n",
i, smmu->irqs[i]);
goto out_free_irqs;
}
}
-
--[[linux-4.4.1/request_irq()]]
INIT_LIST_HEAD(&smmu->list);
spin_lock(&arm_smmu_devices_lock);
list_add(&smmu->list, &arm_smmu_devices);
spin_unlock(&arm_smmu_devices_lock);
-
--[[linux-4.4.1/INIT_LIST_HEAD()]]
--[[linux-4.4.1/spin_lock()]]
--[[linux-4.4.1/list_add()]]
--[[linux-4.4.1/spin_unlock()]]
arm_smmu_device_reset(smmu);
-
--[[linux-4.4.1/arm_smmu_device_reset()]]
return 0;
out_free_irqs:
while (i--)
free_irq(smmu->irqs[i], smmu);
-
--[[linux-4.4.1/free_irq()]]
out_put_masters:
for (node = rb_first(&smmu->masters); node; node = rb_n...
struct arm_smmu_master *master
= container_of(node, struct arm_smmu_master, node);
of_node_put(master->of_node);
}
-
--[[linux-4.4.1/rb_first()]]
--[[linux-4.4.1/rb_next()]]
--[[linux-4.4.1/container_of()]]
--[[linux-4.4.1/of_node_put()]]
return err;
}
*コメント [#z752bb9f]
終了行:
*参照元 [#l13893d2]
#backlinks
*説明 [#s2d2470f]
-パス: [[linux-4.4.1/drivers/iommu/arm-smmu.c]]
-FIXME: これは何？
--説明
**引数 [#eb810a56]
-struct platform_device *pdev
--
--[[linux-4.4.1/platform_device]]
**返り値 [#leffecc6]
-int
--
**参考 [#i4ffb69c]
*実装 [#j085df4b]
static int arm_smmu_device_dt_probe(struct platform_devi...
{
const struct of_device_id *of_id;
struct resource *res;
struct arm_smmu_device *smmu;
struct device *dev = &pdev->dev;
struct rb_node *node;
struct of_phandle_args masterspec;
int num_irqs, i, err;
-
--[[linux-4.4.1/of_device_id]]
--[[linux-4.4.1/resource]]
--[[linux-4.4.1/arm_smmu_device]]
--[[linux-4.4.1/device]]
--[[linux-4.4.1/rb_node]]
--[[linux-4.4.1/of_phandle_args]]
smmu = devm_kzalloc(dev, sizeof(*smmu), GFP_KERNEL);
if (!smmu) {
dev_err(dev, "failed to allocate arm_smmu_device\n");
return -ENOMEM;
}
smmu->dev = dev;
-
--[[linux-4.4.1/devm_kzalloc()]]
--[[linux-4.4.1/dev_err()]]
of_id = of_match_node(arm_smmu_of_match, dev->of_node);
smmu->version = (enum arm_smmu_arch_version)of_id->data;
-
--[[linux-4.4.1/of_match_node()]]
--[[linux-4.4.1/arm_smmu_of_match(global)]]
--[[linux-4.4.1/arm_smmu_arch_version]]
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
smmu->base = devm_ioremap_resource(dev, res);
if (IS_ERR(smmu->base))
return PTR_ERR(smmu->base);
smmu->size = resource_size(res);
-
--[[linux-4.4.1/platform_get_resource()]]
--[[linux-4.4.1/devm_ioremap_resource()]]
--[[linux-4.4.1/IS_ERR()]]
--[[linux-4.4.1/PTR_ERR()]]
--[[linux-4.4.1/resource_size()]]
if (of_property_read_u32(dev->of_node, "#global-interru...
&smmu->num_global_irqs)) {
dev_err(dev, "missing #global-interrupts property\n");
return -ENODEV;
}
-
--[[linux-4.4.1/of_property_read_u32()]]
num_irqs = 0;
while ((res = platform_get_resource(pdev, IORESOURCE_IR...
num_irqs++;
if (num_irqs > smmu->num_global_irqs)
smmu->num_context_irqs++;
}
if (!smmu->num_context_irqs) {
dev_err(dev, "found %d interrupts but expected at leas...
num_irqs, smmu->num_global_irqs + 1);
return -ENODEV;
}
smmu->irqs = devm_kzalloc(dev, sizeof(*smmu->irqs) * nu...
GFP_KERNEL);
if (!smmu->irqs) {
dev_err(dev, "failed to allocate %d irqs\n", num_irqs);
return -ENOMEM;
}
for (i = 0; i < num_irqs; ++i) {
int irq = platform_get_irq(pdev, i);
if (irq < 0) {
dev_err(dev, "failed to get irq index %d\n", i);
return -ENODEV;
}
smmu->irqs[i] = irq;
}
-
--[[linux-4.4.1/platform_get_irq()]]
err = arm_smmu_device_cfg_probe(smmu);
if (err)
return err;
-
--[[linux-4.4.1/arm_smmu_device_cfg_probe()]]
i = 0;
smmu->masters = RB_ROOT;
while (!of_parse_phandle_with_args(dev->of_node, "mmu-m...
"#stream-id-cells", i,
&masterspec)) {
err = register_smmu_master(smmu, dev, &masterspec);
if (err) {
dev_err(dev, "failed to add master %s\n",
masterspec.np->name);
goto out_put_masters;
}
i++;
}
dev_notice(dev, "registered %d master devices\n", i);
-
--[[linux-4.4.1/of_parse_phandle_with_args()]]
--[[linux-4.4.1/masterspec(global)]]
--[[linux-4.4.1/register_smmu_master()]]
parse_driver_options(smmu);
-
--[[linux-4.4.1/parse_driver_options()]]
if (smmu->version > ARM_SMMU_V1 &&
smmu->num_context_banks != smmu->num_context_irqs) {
dev_err(dev,
"found only %d context interrupt(s) but %d required\n",
smmu->num_context_irqs, smmu->num_context_banks);
err = -ENODEV;
goto out_put_masters;
}
for (i = 0; i < smmu->num_global_irqs; ++i) {
err = request_irq(smmu->irqs[i],
arm_smmu_global_fault,
IRQF_SHARED,
"arm-smmu global fault",
smmu);
if (err) {
dev_err(dev, "failed to request global IRQ %d (%u)\n",
i, smmu->irqs[i]);
goto out_free_irqs;
}
}
-
--[[linux-4.4.1/request_irq()]]
INIT_LIST_HEAD(&smmu->list);
spin_lock(&arm_smmu_devices_lock);
list_add(&smmu->list, &arm_smmu_devices);
spin_unlock(&arm_smmu_devices_lock);
-
--[[linux-4.4.1/INIT_LIST_HEAD()]]
--[[linux-4.4.1/spin_lock()]]
--[[linux-4.4.1/list_add()]]
--[[linux-4.4.1/spin_unlock()]]
arm_smmu_device_reset(smmu);
-
--[[linux-4.4.1/arm_smmu_device_reset()]]
return 0;
out_free_irqs:
while (i--)
free_irq(smmu->irqs[i], smmu);
-
--[[linux-4.4.1/free_irq()]]
out_put_masters:
for (node = rb_first(&smmu->masters); node; node = rb_n...
struct arm_smmu_master *master
= container_of(node, struct arm_smmu_master, node);
of_node_put(master->of_node);
}
-
--[[linux-4.4.1/rb_first()]]
--[[linux-4.4.1/rb_next()]]
--[[linux-4.4.1/container_of()]]
--[[linux-4.4.1/of_node_put()]]
return err;
}
*コメント [#z752bb9f]
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