/**
* kgsl_cmdbatch_create_compat() - Compat helper to _kgsl_cmdbatch_create()
* @device: Pointer to the KGSL device struct for the GPU
* @flags: Flags passed in from the user command
* @cmdlist: Pointer to the list of commands from the user. Should point to a
* kgsl_ibdesc_compat struct
* @numcmds: Number of commands in the list
* @synclist: Pointer to the list of syncpoints from the user. Should point to
* a kgsl_cmd_syncpoint_compat struct
* @numsyncs: Number of syncpoints in the list
*
* This function is called from _kgsl_cmdbatch_create(), if the user process
* submitting cmds is 32 bit, instead of executing rest of the function.
* It is needed since we do multiple copy_from_user() calls which would
* otherwise be copying user data into the wrongly sized/structured struct.
*/
int kgsl_cmdbatch_create_compat(struct kgsl_device *device, unsigned int flags,
struct kgsl_cmdbatch *cmdbatch, void __user *cmdlist,
unsigned int numcmds, void __user *synclist,
unsigned int numsyncs)
{
int ret = 0, i;
if (!(flags & (KGSL_CMDBATCH_SYNC | KGSL_CMDBATCH_MARKER))) {
struct kgsl_ibdesc_compat ibdesc32;
struct kgsl_ibdesc ibdesc;
void __user *uptr = cmdlist;
for (i = 0; i < numcmds; i++) {
memset(&ibdesc32, 0, sizeof(ibdesc32));
if (copy_from_user(&ibdesc32, uptr, sizeof(ibdesc32))) {
ret = -EFAULT;
goto done;
}
ibdesc.gpuaddr = (unsigned long)ibdesc32.gpuaddr;
ibdesc.sizedwords = (size_t)ibdesc32.sizedwords;
ibdesc.ctrl = (unsigned int)ibdesc32.ctrl;
ret = kgsl_cmdbatch_add_memobj(cmdbatch, &ibdesc);
if (ret)
goto done;
uptr += sizeof(ibdesc32);
}
}
if (synclist && numsyncs) {
struct kgsl_cmd_syncpoint_compat sync32;
struct kgsl_cmd_syncpoint sync;
void __user *uptr = synclist;
for (i = 0; i < numsyncs; i++) {
memset(&sync32, 0, sizeof(sync32));
if (copy_from_user(&sync32, uptr, sizeof(sync32)))
return -EFAULT;
sync.type = sync32.type;
sync.priv = compat_ptr(sync32.priv);
sync.size = (size_t)sync32.size;
ret = kgsl_cmdbatch_add_sync(device, cmdbatch, &sync);
if (ret)
return ret;
uptr += sizeof(sync32);
}
}
done:
return ret;
}
/**
* kgsl_cmdbatch_create_compat() - Compat helper to _kgsl_cmdbatch_create()
* @device: Pointer to the KGSL device struct for the GPU
* @flags: Flags passed in from the user command
* @cmdlist: Pointer to the list of commands from the user. Should point to a
* kgsl_ibdesc_compat struct
* @numcmds: Number of commands in the list
* @synclist: Pointer to the list of syncpoints from the user. Should point to
* a kgsl_cmd_syncpoint_compat struct
* @numsyncs: Number of syncpoints in the list
*
* This function is called from _kgsl_cmdbatch_create(), if the user process
* submitting cmds is 32 bit, instead of executing rest of the function.
* It is needed since we do multiple copy_from_user() calls which would
* otherwise be copying user data into the wrongly sized/structured struct.
*/
int kgsl_cmdbatch_create_compat(struct kgsl_device *device, unsigned int flags,
struct kgsl_cmdbatch *cmdbatch, void __user *cmdlist,
unsigned int numcmds, void __user *synclist,
unsigned int numsyncs)
{
int ret = 0;
struct kgsl_ibdesc_compat *cmdbatch_ibdesc;
if (!(flags & KGSL_CONTEXT_SYNC)) {
if (copy_from_user(cmdbatch_ibdesc, cmdlist,
sizeof(struct kgsl_ibdesc_compat) * numcmds))
return -EFAULT;
cmdbatch->ibdesc->gpuaddr = (unsigned long)
cmdbatch_ibdesc->gpuaddr;
cmdbatch->ibdesc->sizedwords = (size_t)
cmdbatch_ibdesc->sizedwords;
cmdbatch->ibdesc->ctrl = cmdbatch_ibdesc->ctrl;
}
if (synclist && numsyncs) {
struct kgsl_cmd_syncpoint_compat sync32;
struct kgsl_cmd_syncpoint sync;
void __user *uptr = synclist;
int i;
for (i = 0; i < numsyncs; i++) {
memset(&sync32, 0, sizeof(sync32));
if (copy_from_user(&sync32, uptr, sizeof(sync32)))
return -EFAULT;
sync.type = sync32.type;
sync.priv = compat_ptr(sync32.priv);
sync.size = (size_t)sync32.size;
ret = kgsl_cmdbatch_add_sync(device, cmdbatch, &sync);
if (ret)
return ret;
uptr += sizeof(sync32);
}
}
return ret;
}