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drm/etnaviv: copy pmrs from userspace 

Changes from v1 -> v2:
- renamed submit_perfmon_request() to submit_perfmon_validate()
- extended flags validation
- added comment about offset 0
- moved assigment of cmdbuf->nr_pmrs below the copy_from_user of the pmrs.

Changes from v2 -> v3:
- fixed flags validation

Changes v4 -> v5
- pass cmdbuf->exec_state to etnaviv_pm_req_validate(..)

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
This commit is contained in:
Christian Gmeiner 2017-09-24 15:15:26 +02:00 committed by Lucas Stach
parent 46df52cd43
commit c8e4a7fdea
1 changed files with 67 additions and 2 deletions
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69
drivers/gpu/drm/etnaviv/etnaviv_gem_submit.c
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@ -21,6 +21,7 @@
#include "etnaviv_drv.h"
#include "etnaviv_gpu.h"
#include "etnaviv_gem.h"
#include "etnaviv_perfmon.h"
/*
* Cmdstream submission:
@ -283,6 +284,54 @@ static int submit_reloc(struct etnaviv_gem_submit *submit, void *stream,
return 0;
}
static int submit_perfmon_validate(struct etnaviv_gem_submit *submit,
struct etnaviv_cmdbuf *cmdbuf,
const struct drm_etnaviv_gem_submit_pmr *pmrs,
u32 nr_pms)
{
u32 i;
for (i = 0; i < nr_pms; i++) {
const struct drm_etnaviv_gem_submit_pmr *r = pmrs + i;
struct etnaviv_gem_submit_bo *bo;
int ret;
ret = submit_bo(submit, r->read_idx, &bo);
if (ret)
return ret;
/* at offset 0 a sequence number gets stored used for userspace sync */
if (r->read_offset == 0) {
DRM_ERROR("perfmon request: offset is 0");
return -EINVAL;
}
if (r->read_offset >= bo->obj->base.size - sizeof(u32)) {
DRM_ERROR("perfmon request: offset %u outside object", i);
return -EINVAL;
}
if (r->flags & ~(ETNA_PM_PROCESS_PRE | ETNA_PM_PROCESS_POST)) {
DRM_ERROR("perfmon request: flags are not valid");
return -EINVAL;
}
if (etnaviv_pm_req_validate(r, cmdbuf->exec_state)) {
DRM_ERROR("perfmon request: domain or signal not valid");
return -EINVAL;
}
cmdbuf->pmrs[i].flags = r->flags;
cmdbuf->pmrs[i].domain = r->domain;
cmdbuf->pmrs[i].signal = r->signal;
cmdbuf->pmrs[i].sequence = r->sequence;
cmdbuf->pmrs[i].offset = r->read_offset;
cmdbuf->pmrs[i].bo_vma = etnaviv_gem_vmap(&bo->obj->base);
}
return 0;
}
static void submit_cleanup(struct etnaviv_gem_submit *submit)
{
unsigned i;
@ -306,6 +355,7 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
struct etnaviv_drm_private *priv = dev->dev_private;
struct drm_etnaviv_gem_submit *args = data;
struct drm_etnaviv_gem_submit_reloc *relocs;
struct drm_etnaviv_gem_submit_pmr *pmrs;
struct drm_etnaviv_gem_submit_bo *bos;
struct etnaviv_gem_submit *submit;
struct etnaviv_cmdbuf *cmdbuf;
@ -347,11 +397,12 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
*/
bos = kvmalloc_array(args->nr_bos, sizeof(*bos), GFP_KERNEL);
relocs = kvmalloc_array(args->nr_relocs, sizeof(*relocs), GFP_KERNEL);
pmrs = kvmalloc_array(args->nr_pmrs, sizeof(*pmrs), GFP_KERNEL);
stream = kvmalloc_array(1, args->stream_size, GFP_KERNEL);
cmdbuf = etnaviv_cmdbuf_new(gpu->cmdbuf_suballoc,
ALIGN(args->stream_size, 8) + 8,
args->nr_bos, 0);
if (!bos || !relocs || !stream || !cmdbuf) {
args->nr_bos, args->nr_pmrs);
if (!bos || !relocs || !pmrs || !stream || !cmdbuf) {
ret = -ENOMEM;
goto err_submit_cmds;
}
@ -373,6 +424,14 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
goto err_submit_cmds;
}
ret = copy_from_user(pmrs, u64_to_user_ptr(args->pmrs),
args->nr_pmrs * sizeof(*pmrs));
if (ret) {
ret = -EFAULT;
goto err_submit_cmds;
}
cmdbuf->nr_pmrs = args->nr_pmrs;
ret = copy_from_user(stream, u64_to_user_ptr(args->stream),
args->stream_size);
if (ret) {
@ -441,6 +500,10 @@ int etnaviv_ioctl_gem_submit(struct drm_device *dev, void *data,
if (ret)
goto out;
ret = submit_perfmon_validate(submit, cmdbuf, pmrs, args->nr_pmrs);
if (ret)
goto out;
memcpy(cmdbuf->vaddr, stream, args->stream_size);
cmdbuf->user_size = ALIGN(args->stream_size, 8);
@ -494,6 +557,8 @@ err_submit_cmds:
kvfree(bos);
if (relocs)
kvfree(relocs);
if (pmrs)
kvfree(pmrs);
return ret;
}