mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 12:30:53 +07:00
iommu/ipmmu-vmsa: Replace local utlb code with fwspec ids
Now when both 32-bit and 64-bit code inside the driver is using fwspec it is possible to replace the utlb handling with fwspec ids that get populated from ->of_xlate(). Suggested-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Magnus Damm <damm+renesas@opensource.se> Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Magnus Damm
Joerg Roedel
parent
3c49ed322b
commit
7b2d59611f
@ -19,6 +19,7 @@
|
||||
#include <linux/iommu.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_platform.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/sizes.h>
|
||||
#include <linux/slab.h>
|
||||
@ -59,8 +60,6 @@ struct ipmmu_vmsa_domain {
|
||||
|
||||
struct ipmmu_vmsa_iommu_priv {
|
||||
struct ipmmu_vmsa_device *mmu;
|
||||
unsigned int *utlbs;
|
||||
unsigned int num_utlbs;
|
||||
struct device *dev;
|
||||
struct list_head list;
|
||||
};
|
||||
@ -550,13 +549,14 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain,
|
||||
struct device *dev)
|
||||
{
|
||||
struct ipmmu_vmsa_iommu_priv *priv = to_priv(dev);
|
||||
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
|
||||
struct ipmmu_vmsa_device *mmu = priv->mmu;
|
||||
struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
|
||||
unsigned long flags;
|
||||
unsigned int i;
|
||||
int ret = 0;
|
||||
|
||||
if (!mmu) {
|
||||
if (!priv || !priv->mmu) {
|
||||
dev_err(dev, "Cannot attach to IPMMU\n");
|
||||
return -ENXIO;
|
||||
}
|
||||
@ -583,8 +583,8 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain,
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
for (i = 0; i < priv->num_utlbs; ++i)
|
||||
ipmmu_utlb_enable(domain, priv->utlbs[i]);
|
||||
for (i = 0; i < fwspec->num_ids; ++i)
|
||||
ipmmu_utlb_enable(domain, fwspec->ids[i]);
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -592,12 +592,12 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain,
|
||||
static void ipmmu_detach_device(struct iommu_domain *io_domain,
|
||||
struct device *dev)
|
||||
{
|
||||
struct ipmmu_vmsa_iommu_priv *priv = to_priv(dev);
|
||||
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
|
||||
struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < priv->num_utlbs; ++i)
|
||||
ipmmu_utlb_disable(domain, priv->utlbs[i]);
|
||||
for (i = 0; i < fwspec->num_ids; ++i)
|
||||
ipmmu_utlb_disable(domain, fwspec->ids[i]);
|
||||
|
||||
/*
|
||||
* TODO: Optimize by disabling the context when no device is attached.
|
||||
@ -633,102 +633,36 @@ static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain,
|
||||
return domain->iop->iova_to_phys(domain->iop, iova);
|
||||
}
|
||||
|
||||
static int ipmmu_find_utlbs(struct ipmmu_vmsa_device *mmu, struct device *dev,
|
||||
unsigned int *utlbs, unsigned int num_utlbs)
|
||||
{
|
||||
unsigned int i;
|
||||
|
||||
for (i = 0; i < num_utlbs; ++i) {
|
||||
struct of_phandle_args args;
|
||||
int ret;
|
||||
|
||||
ret = of_parse_phandle_with_args(dev->of_node, "iommus",
|
||||
"#iommu-cells", i, &args);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
of_node_put(args.np);
|
||||
|
||||
if (args.np != mmu->dev->of_node || args.args_count != 1)
|
||||
return -EINVAL;
|
||||
|
||||
utlbs[i] = args.args[0];
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int ipmmu_init_platform_device(struct device *dev)
|
||||
static int ipmmu_init_platform_device(struct device *dev,
|
||||
struct of_phandle_args *args)
|
||||
{
|
||||
struct platform_device *ipmmu_pdev;
|
||||
struct ipmmu_vmsa_iommu_priv *priv;
|
||||
struct ipmmu_vmsa_device *mmu;
|
||||
unsigned int *utlbs;
|
||||
unsigned int i;
|
||||
int num_utlbs;
|
||||
int ret = -ENODEV;
|
||||
|
||||
/* Find the master corresponding to the device. */
|
||||
|
||||
num_utlbs = of_count_phandle_with_args(dev->of_node, "iommus",
|
||||
"#iommu-cells");
|
||||
if (num_utlbs < 0)
|
||||
ipmmu_pdev = of_find_device_by_node(args->np);
|
||||
if (!ipmmu_pdev)
|
||||
return -ENODEV;
|
||||
|
||||
utlbs = kcalloc(num_utlbs, sizeof(*utlbs), GFP_KERNEL);
|
||||
if (!utlbs)
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv)
|
||||
return -ENOMEM;
|
||||
|
||||
spin_lock(&ipmmu_devices_lock);
|
||||
|
||||
list_for_each_entry(mmu, &ipmmu_devices, list) {
|
||||
ret = ipmmu_find_utlbs(mmu, dev, utlbs, num_utlbs);
|
||||
if (!ret) {
|
||||
/*
|
||||
* TODO Take a reference to the MMU to protect
|
||||
* against device removal.
|
||||
*/
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
spin_unlock(&ipmmu_devices_lock);
|
||||
|
||||
if (ret < 0)
|
||||
goto error;
|
||||
|
||||
for (i = 0; i < num_utlbs; ++i) {
|
||||
if (utlbs[i] >= mmu->num_utlbs) {
|
||||
ret = -EINVAL;
|
||||
goto error;
|
||||
}
|
||||
}
|
||||
|
||||
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
||||
if (!priv) {
|
||||
ret = -ENOMEM;
|
||||
goto error;
|
||||
}
|
||||
|
||||
priv->mmu = mmu;
|
||||
priv->utlbs = utlbs;
|
||||
priv->num_utlbs = num_utlbs;
|
||||
priv->mmu = platform_get_drvdata(ipmmu_pdev);
|
||||
priv->dev = dev;
|
||||
dev->iommu_fwspec->iommu_priv = priv;
|
||||
return 0;
|
||||
|
||||
error:
|
||||
kfree(utlbs);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int ipmmu_of_xlate(struct device *dev,
|
||||
struct of_phandle_args *spec)
|
||||
{
|
||||
iommu_fwspec_add_ids(dev, spec->args, 1);
|
||||
|
||||
/* Initialize once - xlate() will call multiple times */
|
||||
if (to_priv(dev))
|
||||
return 0;
|
||||
|
||||
return ipmmu_init_platform_device(dev);
|
||||
return ipmmu_init_platform_device(dev, spec);
|
||||
}
|
||||
|
||||
#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user