leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

platform-msi: Let core code handle MSI descriptors

Browse Source 
Use the core functionality for platform MSI interrupt domains. The platform
device MSI interrupt domains will be converted in a later step.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20211206210748.903173257@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-12-06 23:51:41 +01:00
parent e8604b1447
commit 653b50c5f9
1 changed files with 48 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

112
drivers/base/platform-msi.c
View File

@ -107,57 +107,6 @@ static void platform_msi_update_chip_ops(struct msi_domain_info *info)
info->flags &= ~MSI_FLAG_LEVEL_CAPABLE;
}
static void platform_msi_free_descs(struct device *dev, int base, int nvec)
{
struct msi_desc *desc, *tmp;
list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
if (desc->msi_index >= base &&
desc->msi_index < (base + nvec)) {
list_del(&desc->list);
free_msi_entry(desc);
}
}
}
static int platform_msi_alloc_descs_with_irq(struct device *dev, int virq,
int nvec)
{
struct msi_desc *desc;
int i, base = 0;
if (!list_empty(dev_to_msi_list(dev))) {
desc = list_last_entry(dev_to_msi_list(dev),
struct msi_desc, list);
base = desc->msi_index + 1;
}
for (i = 0; i < nvec; i++) {
desc = alloc_msi_entry(dev, 1, NULL);
if (!desc)
break;
desc->msi_index = base + i;
desc->irq = virq ? virq + i : 0;
list_add_tail(&desc->list, dev_to_msi_list(dev));
}
if (i != nvec) {
/* Clean up the mess */
platform_msi_free_descs(dev, base, nvec);
return -ENOMEM;
}
return 0;
}
static int platform_msi_alloc_descs(struct device *dev, int nvec)
{
return platform_msi_alloc_descs_with_irq(dev, 0, nvec);
}
/**
* platform_msi_create_irq_domain - Create a platform MSI interrupt domain
* @fwnode: Optional fwnode of the interrupt controller
@ -180,7 +129,8 @@ struct irq_domain *platform_msi_create_irq_domain(struct fwnode_handle *fwnode,
platform_msi_update_dom_ops(info);
if (info->flags & MSI_FLAG_USE_DEF_CHIP_OPS)
platform_msi_update_chip_ops(info);
info->flags |= MSI_FLAG_DEV_SYSFS;
info->flags |= MSI_FLAG_DEV_SYSFS | MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS |
MSI_FLAG_FREE_MSI_DESCS;
domain = msi_create_irq_domain(fwnode, info, parent);
if (domain)
@ -262,20 +212,10 @@ int platform_msi_domain_alloc_irqs(struct device *dev, unsigned int nvec,
if (err)
return err;
err = platform_msi_alloc_descs(dev, nvec);
if (err)
goto out_free_priv_data;
err = msi_domain_alloc_irqs(dev->msi.domain, dev, nvec);
if (err)
goto out_free_desc;
platform_msi_free_priv_data(dev);
return 0;
out_free_desc:
platform_msi_free_descs(dev, 0, nvec);
out_free_priv_data:
platform_msi_free_priv_data(dev);
return err;
}
EXPORT_SYMBOL_GPL(platform_msi_domain_alloc_irqs);
@ -287,7 +227,6 @@ EXPORT_SYMBOL_GPL(platform_msi_domain_alloc_irqs);
void platform_msi_domain_free_irqs(struct device *dev)
{
msi_domain_free_irqs(dev->msi.domain, dev);
platform_msi_free_descs(dev, 0, MAX_DEV_MSIS);
platform_msi_free_priv_data(dev);
}
EXPORT_SYMBOL_GPL(platform_msi_domain_free_irqs);
@ -361,6 +300,51 @@ free_priv:
return NULL;
}
static void platform_msi_free_descs(struct device *dev, int base, int nvec)
{
struct msi_desc *desc, *tmp;
list_for_each_entry_safe(desc, tmp, dev_to_msi_list(dev), list) {
if (desc->msi_index >= base &&
desc->msi_index < (base + nvec)) {
list_del(&desc->list);
free_msi_entry(desc);
}
}
}
static int platform_msi_alloc_descs_with_irq(struct device *dev, int virq,
int nvec)
{
struct msi_desc *desc;
int i, base = 0;
if (!list_empty(dev_to_msi_list(dev))) {
desc = list_last_entry(dev_to_msi_list(dev),
struct msi_desc, list);
base = desc->msi_index + 1;
}
for (i = 0; i < nvec; i++) {
desc = alloc_msi_entry(dev, 1, NULL);
if (!desc)
break;
desc->msi_index = base + i;
desc->irq = virq + i;
list_add_tail(&desc->list, dev_to_msi_list(dev));
}
if (i != nvec) {
/* Clean up the mess */
platform_msi_free_descs(dev, base, nvec);
return -ENOMEM;
}
return 0;
}
/**
* platform_msi_device_domain_free - Free interrupts associated with a platform-msi
* device domain