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drm/amdkfd: rewrite kfd_ioctl() according to drm_ioctl() 

This patch changes kfd_ioctl() to be very similar to drm_ioctl().

The patch defines an array of amdkfd_ioctls, which maps IOCTL definition to the
ioctl function.

The kfd_ioctl() uses that mapping to call the appropriate ioctl function,
through a function pointer.

This patch also declares a new typedef for the ioctl function pointer.

v2: Renamed KFD_COMMAND_(START|END) to AMDKFD_...

Signed-off-by: Oded Gabbay <oded.gabbay@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Oded Gabbay 2014-12-29 14:20:05 +02:00
parent b81c55db10
commit 76baee6c73
2 changed files with 86 additions and 48 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

116
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
View File

@ -482,21 +482,79 @@ static int kfd_ioctl_get_process_apertures(struct file *filp,
return 0;
}
#define AMDKFD_IOCTL_DEF(ioctl, _func, _flags) \
[_IOC_NR(ioctl)] = {.cmd = ioctl, .func = _func, .flags = _flags, .cmd_drv = 0, .name = #ioctl}
/** Ioctl table */
static const struct amdkfd_ioctl_desc amdkfd_ioctls[] = {
AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_VERSION,
kfd_ioctl_get_version, 0),
AMDKFD_IOCTL_DEF(AMDKFD_IOC_CREATE_QUEUE,
kfd_ioctl_create_queue, 0),
AMDKFD_IOCTL_DEF(AMDKFD_IOC_DESTROY_QUEUE,
kfd_ioctl_destroy_queue, 0),
AMDKFD_IOCTL_DEF(AMDKFD_IOC_SET_MEMORY_POLICY,
kfd_ioctl_set_memory_policy, 0),
AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_CLOCK_COUNTERS,
kfd_ioctl_get_clock_counters, 0),
AMDKFD_IOCTL_DEF(AMDKFD_IOC_GET_PROCESS_APERTURES,
kfd_ioctl_get_process_apertures, 0),
AMDKFD_IOCTL_DEF(AMDKFD_IOC_UPDATE_QUEUE,
kfd_ioctl_update_queue, 0),
};
#define AMDKFD_CORE_IOCTL_COUNT ARRAY_SIZE(amdkfd_ioctls)
static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
struct kfd_process *process;
amdkfd_ioctl_t *func;
const struct amdkfd_ioctl_desc *ioctl = NULL;
unsigned int nr = _IOC_NR(cmd);
char stack_kdata[128];
char *kdata = NULL;
unsigned int usize, asize;
int retcode = -EINVAL;
dev_dbg(kfd_device,
"ioctl cmd 0x%x (#%d), arg 0x%lx\n",
cmd, _IOC_NR(cmd), arg);
if (nr >= AMDKFD_CORE_IOCTL_COUNT)
goto err_i1;
if ((nr >= AMDKFD_COMMAND_START) && (nr < AMDKFD_COMMAND_END)) {
u32 amdkfd_size;
ioctl = &amdkfd_ioctls[nr];
amdkfd_size = _IOC_SIZE(ioctl->cmd);
usize = asize = _IOC_SIZE(cmd);
if (amdkfd_size > asize)
asize = amdkfd_size;
cmd = ioctl->cmd;
} else
goto err_i1;
dev_dbg(kfd_device, "ioctl cmd 0x%x (#%d), arg 0x%lx\n", cmd, nr, arg);
process = kfd_get_process(current);
if (IS_ERR(process))
return PTR_ERR(process);
if (IS_ERR(process)) {
dev_dbg(kfd_device, "no process\n");
goto err_i1;
}
/* Do not trust userspace, use our own definition */
func = ioctl->func;
if (unlikely(!func)) {
dev_dbg(kfd_device, "no function\n");
retcode = -EINVAL;
goto err_i1;
}
if (cmd & (IOC_IN | IOC_OUT)) {
if (asize <= sizeof(stack_kdata)) {
@ -521,55 +579,17 @@ static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
memset(kdata, 0, usize);
}
switch (cmd) {
case AMDKFD_IOC_GET_VERSION:
retcode = kfd_ioctl_get_version(filep, process, kdata);
break;
case AMDKFD_IOC_CREATE_QUEUE:
retcode = kfd_ioctl_create_queue(filep, process,
kdata);
break;
case AMDKFD_IOC_DESTROY_QUEUE:
retcode = kfd_ioctl_destroy_queue(filep, process,
kdata);
break;
case AMDKFD_IOC_SET_MEMORY_POLICY:
retcode = kfd_ioctl_set_memory_policy(filep, process,
kdata);
break;
case AMDKFD_IOC_GET_CLOCK_COUNTERS:
retcode = kfd_ioctl_get_clock_counters(filep, process,
kdata);
break;
case AMDKFD_IOC_GET_PROCESS_APERTURES:
retcode = kfd_ioctl_get_process_apertures(filep, process,
kdata);
break;
case AMDKFD_IOC_UPDATE_QUEUE:
retcode = kfd_ioctl_update_queue(filep, process,
kdata);
break;
default:
dev_dbg(kfd_device,
"unknown ioctl cmd 0x%x, arg 0x%lx)\n",
cmd, arg);
retcode = -EINVAL;
break;
}
retcode = func(filep, process, kdata);
if (cmd & IOC_OUT)
if (copy_to_user((void __user *)arg, kdata, usize) != 0)
retcode = -EFAULT;
err_i1:
if (!ioctl)
dev_dbg(kfd_device, "invalid ioctl: pid=%d, cmd=0x%02x, nr=0x%02x\n",
task_pid_nr(current), cmd, nr);
if (kdata != stack_kdata)
kfree(kdata);

18
drivers/gpu/drm/amd/amdkfd/kfd_priv.h
View File

@ -463,6 +463,24 @@ struct kfd_process {
bool is_32bit_user_mode;
};
/**
* Ioctl function type.
*
* \param filep pointer to file structure.
* \param p amdkfd process pointer.
* \param data pointer to arg that was copied from user.
*/
typedef int amdkfd_ioctl_t(struct file *filep, struct kfd_process *p,
void *data);
struct amdkfd_ioctl_desc {
unsigned int cmd;
int flags;
amdkfd_ioctl_t *func;
unsigned int cmd_drv;
const char *name;
};
void kfd_process_create_wq(void);
void kfd_process_destroy_wq(void);
struct kfd_process *kfd_create_process(const struct task_struct *);