Release 4.7 drivers/gpu/drm/msm/msm_iommu.c
/*
* Copyright (C) 2013 Red Hat
* Author: Rob Clark <robdclark@gmail.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "msm_drv.h"
#include "msm_mmu.h"
struct msm_iommu {
struct msm_mmu base;
struct iommu_domain *domain;
};
#define to_msm_iommu(x) container_of(x, struct msm_iommu, base)
static int msm_fault_handler(struct iommu_domain *iommu, struct device *dev,
unsigned long iova, int flags, void *arg)
{
pr_warn_ratelimited("*** fault: iova=%08lx, flags=%d\n", iova, flags);
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 39 | 100.00% | 2 | 100.00% |
| Total | 39 | 100.00% | 2 | 100.00% |
static int msm_iommu_attach(struct msm_mmu *mmu, const char * const *names,
int cnt)
{
struct msm_iommu *iommu = to_msm_iommu(mmu);
return iommu_attach_device(iommu->domain, mmu->dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 43 | 100.00% | 3 | 100.00% |
| Total | 43 | 100.00% | 3 | 100.00% |
static void msm_iommu_detach(struct msm_mmu *mmu, const char * const *names,
int cnt)
{
struct msm_iommu *iommu = to_msm_iommu(mmu);
iommu_detach_device(iommu->domain, mmu->dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| stephane viau | stephane viau | 38 | 90.48% | 1 | 33.33% |
| rob clark | rob clark | 4 | 9.52% | 2 | 66.67% |
| Total | 42 | 100.00% | 3 | 100.00% |
static int msm_iommu_map(struct msm_mmu *mmu, uint32_t iova,
struct sg_table *sgt, unsigned len, int prot)
{
struct msm_iommu *iommu = to_msm_iommu(mmu);
struct iommu_domain *domain = iommu->domain;
struct scatterlist *sg;
unsigned int da = iova;
unsigned int i, j;
int ret;
if (!domain || !sgt)
return -EINVAL;
for_each_sg(sgt->sgl, sg, sgt->nents, i) {
u32 pa = sg_phys(sg) - sg->offset;
size_t bytes = sg->length + sg->offset;
VERB("map[%d]: %08x %08x(%zx)", i, iova, pa, bytes);
ret = iommu_map(domain, da, pa, bytes, prot);
if (ret)
goto fail;
da += bytes;
}
return 0;
fail:
da = iova;
for_each_sg(sgt->sgl, sg, i, j) {
size_t bytes = sg->length + sg->offset;
iommu_unmap(domain, da, bytes);
da += bytes;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 197 | 99.49% | 1 | 50.00% |
| thierry reding | thierry reding | 1 | 0.51% | 1 | 50.00% |
| Total | 198 | 100.00% | 2 | 100.00% |
static int msm_iommu_unmap(struct msm_mmu *mmu, uint32_t iova,
struct sg_table *sgt, unsigned len)
{
struct msm_iommu *iommu = to_msm_iommu(mmu);
struct iommu_domain *domain = iommu->domain;
struct scatterlist *sg;
unsigned int da = iova;
int i;
for_each_sg(sgt->sgl, sg, sgt->nents, i) {
size_t bytes = sg->length + sg->offset;
size_t unmapped;
unmapped = iommu_unmap(domain, da, bytes);
if (unmapped < bytes)
return unmapped;
VERB("unmap[%d]: %08x(%zx)", i, iova, bytes);
BUG_ON(!PAGE_ALIGNED(bytes));
da += bytes;
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 126 | 98.44% | 1 | 33.33% |
| thierry reding | thierry reding | 1 | 0.78% | 1 | 33.33% |
| fabian frederick | fabian frederick | 1 | 0.78% | 1 | 33.33% |
| Total | 128 | 100.00% | 3 | 100.00% |
static void msm_iommu_destroy(struct msm_mmu *mmu)
{
struct msm_iommu *iommu = to_msm_iommu(mmu);
iommu_domain_free(iommu->domain);
kfree(iommu);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 33 | 100.00% | 1 | 100.00% |
| Total | 33 | 100.00% | 1 | 100.00% |
static const struct msm_mmu_funcs funcs = {
.attach = msm_iommu_attach,
.detach = msm_iommu_detach,
.map = msm_iommu_map,
.unmap = msm_iommu_unmap,
.destroy = msm_iommu_destroy,
};
struct msm_mmu *msm_iommu_new(struct device *dev, struct iommu_domain *domain)
{
struct msm_iommu *iommu;
iommu = kzalloc(sizeof(*iommu), GFP_KERNEL);
if (!iommu)
return ERR_PTR(-ENOMEM);
iommu->domain = domain;
msm_mmu_init(&iommu->base, dev, &funcs);
iommu_set_fault_handler(domain, msm_fault_handler, dev);
return &iommu->base;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 81 | 100.00% | 2 | 100.00% |
| Total | 81 | 100.00% | 2 | 100.00% |
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 579 | 92.64% | 4 | 57.14% |
| stephane viau | stephane viau | 43 | 6.88% | 1 | 14.29% |
| thierry reding | thierry reding | 2 | 0.32% | 1 | 14.29% |
| fabian frederick | fabian frederick | 1 | 0.16% | 1 | 14.29% |
| Total | 625 | 100.00% | 7 | 100.00% |
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