[PATCH 1/3] drm/amdkfd: Do copy_to/from_user in general kfd_ioctl()
Oded Gabbay
oded.gabbay at amd.com
Mon Dec 29 04:42:51 PST 2014
This patch moves the copy_to_user() and copy_from_user() calls from the
different ioctl functions in amdkfd to the general kfd_ioctl() function, as
this is a common code for all ioctls.
This was done according to example taken from drm_ioctl.c
Signed-off-by: Oded Gabbay <oded.gabbay at amd.com>
---
drivers/gpu/drm/amd/amdkfd/kfd_chardev.c | 234 +++++++++++++++----------------
1 file changed, 117 insertions(+), 117 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
index 7d4974b..5460ad2 100644
--- a/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
+++ b/drivers/gpu/drm/amd/amdkfd/kfd_chardev.c
@@ -127,17 +127,14 @@ static int kfd_open(struct inode *inode, struct file *filep)
return 0;
}
-static long kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
- void __user *arg)
+static int kfd_ioctl_get_version(struct file *filep, struct kfd_process *p,
+ void *data)
{
- struct kfd_ioctl_get_version_args args;
+ struct kfd_ioctl_get_version_args *args = data;
int err = 0;
- args.major_version = KFD_IOCTL_MAJOR_VERSION;
- args.minor_version = KFD_IOCTL_MINOR_VERSION;
-
- if (copy_to_user(arg, &args, sizeof(args)))
- err = -EFAULT;
+ args->major_version = KFD_IOCTL_MAJOR_VERSION;
+ args->minor_version = KFD_IOCTL_MINOR_VERSION;
return err;
}
@@ -221,10 +218,10 @@ static int set_queue_properties_from_user(struct queue_properties *q_properties,
return 0;
}
-static long kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
- void __user *arg)
+static int kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
+ void *data)
{
- struct kfd_ioctl_create_queue_args args;
+ struct kfd_ioctl_create_queue_args *args = data;
struct kfd_dev *dev;
int err = 0;
unsigned int queue_id;
@@ -233,16 +230,13 @@ static long kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
memset(&q_properties, 0, sizeof(struct queue_properties));
- if (copy_from_user(&args, arg, sizeof(args)))
- return -EFAULT;
-
pr_debug("kfd: creating queue ioctl\n");
- err = set_queue_properties_from_user(&q_properties, &args);
+ err = set_queue_properties_from_user(&q_properties, args);
if (err)
return err;
- dev = kfd_device_by_id(args.gpu_id);
+ dev = kfd_device_by_id(args->gpu_id);
if (dev == NULL)
return -EINVAL;
@@ -250,7 +244,7 @@ static long kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
pdd = kfd_bind_process_to_device(dev, p);
if (IS_ERR(pdd)) {
- err = PTR_ERR(pdd);
+ err = -ESRCH;
goto err_bind_process;
}
@@ -263,33 +257,26 @@ static long kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p,
if (err != 0)
goto err_create_queue;
- args.queue_id = queue_id;
+ args->queue_id = queue_id;
/* Return gpu_id as doorbell offset for mmap usage */
- args.doorbell_offset = args.gpu_id << PAGE_SHIFT;
-
- if (copy_to_user(arg, &args, sizeof(args))) {
- err = -EFAULT;
- goto err_copy_args_out;
- }
+ args->doorbell_offset = args->gpu_id << PAGE_SHIFT;
mutex_unlock(&p->mutex);
- pr_debug("kfd: queue id %d was created successfully\n", args.queue_id);
+ pr_debug("kfd: queue id %d was created successfully\n", args->queue_id);
pr_debug("ring buffer address == 0x%016llX\n",
- args.ring_base_address);
+ args->ring_base_address);
pr_debug("read ptr address == 0x%016llX\n",
- args.read_pointer_address);
+ args->read_pointer_address);
pr_debug("write ptr address == 0x%016llX\n",
- args.write_pointer_address);
+ args->write_pointer_address);
return 0;
-err_copy_args_out:
- pqm_destroy_queue(&p->pqm, queue_id);
err_create_queue:
err_bind_process:
mutex_unlock(&p->mutex);
@@ -297,99 +284,90 @@ err_bind_process:
}
static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p,
- void __user *arg)
+ void *data)
{
int retval;
- struct kfd_ioctl_destroy_queue_args args;
-
- if (copy_from_user(&args, arg, sizeof(args)))
- return -EFAULT;
+ struct kfd_ioctl_destroy_queue_args *args = data;
pr_debug("kfd: destroying queue id %d for PASID %d\n",
- args.queue_id,
+ args->queue_id,
p->pasid);
mutex_lock(&p->mutex);
- retval = pqm_destroy_queue(&p->pqm, args.queue_id);
+ retval = pqm_destroy_queue(&p->pqm, args->queue_id);
mutex_unlock(&p->mutex);
return retval;
}
static int kfd_ioctl_update_queue(struct file *filp, struct kfd_process *p,
- void __user *arg)
+ void *data)
{
int retval;
- struct kfd_ioctl_update_queue_args args;
+ struct kfd_ioctl_update_queue_args *args = data;
struct queue_properties properties;
- if (copy_from_user(&args, arg, sizeof(args)))
- return -EFAULT;
-
- if (args.queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
+ if (args->queue_percentage > KFD_MAX_QUEUE_PERCENTAGE) {
pr_err("kfd: queue percentage must be between 0 to KFD_MAX_QUEUE_PERCENTAGE\n");
return -EINVAL;
}
- if (args.queue_priority > KFD_MAX_QUEUE_PRIORITY) {
+ if (args->queue_priority > KFD_MAX_QUEUE_PRIORITY) {
pr_err("kfd: queue priority must be between 0 to KFD_MAX_QUEUE_PRIORITY\n");
return -EINVAL;
}
- if ((args.ring_base_address) &&
+ if ((args->ring_base_address) &&
(!access_ok(VERIFY_WRITE,
- (const void __user *) args.ring_base_address,
+ (const void __user *) args->ring_base_address,
sizeof(uint64_t)))) {
pr_err("kfd: can't access ring base address\n");
return -EFAULT;
}
- if (!is_power_of_2(args.ring_size) && (args.ring_size != 0)) {
+ if (!is_power_of_2(args->ring_size) && (args->ring_size != 0)) {
pr_err("kfd: ring size must be a power of 2 or 0\n");
return -EINVAL;
}
- properties.queue_address = args.ring_base_address;
- properties.queue_size = args.ring_size;
- properties.queue_percent = args.queue_percentage;
- properties.priority = args.queue_priority;
+ properties.queue_address = args->ring_base_address;
+ properties.queue_size = args->ring_size;
+ properties.queue_percent = args->queue_percentage;
+ properties.priority = args->queue_priority;
pr_debug("kfd: updating queue id %d for PASID %d\n",
- args.queue_id, p->pasid);
+ args->queue_id, p->pasid);
mutex_lock(&p->mutex);
- retval = pqm_update_queue(&p->pqm, args.queue_id, &properties);
+ retval = pqm_update_queue(&p->pqm, args->queue_id, &properties);
mutex_unlock(&p->mutex);
return retval;
}
-static long kfd_ioctl_set_memory_policy(struct file *filep,
- struct kfd_process *p, void __user *arg)
+static int kfd_ioctl_set_memory_policy(struct file *filep,
+ struct kfd_process *p, void *data)
{
- struct kfd_ioctl_set_memory_policy_args args;
+ struct kfd_ioctl_set_memory_policy_args *args = data;
struct kfd_dev *dev;
int err = 0;
struct kfd_process_device *pdd;
enum cache_policy default_policy, alternate_policy;
- if (copy_from_user(&args, arg, sizeof(args)))
- return -EFAULT;
-
- if (args.default_policy != KFD_IOC_CACHE_POLICY_COHERENT
- && args.default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
+ if (args->default_policy != KFD_IOC_CACHE_POLICY_COHERENT
+ && args->default_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
return -EINVAL;
}
- if (args.alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
- && args.alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
+ if (args->alternate_policy != KFD_IOC_CACHE_POLICY_COHERENT
+ && args->alternate_policy != KFD_IOC_CACHE_POLICY_NONCOHERENT) {
return -EINVAL;
}
- dev = kfd_device_by_id(args.gpu_id);
+ dev = kfd_device_by_id(args->gpu_id);
if (dev == NULL)
return -EINVAL;
@@ -397,23 +375,23 @@ static long kfd_ioctl_set_memory_policy(struct file *filep,
pdd = kfd_bind_process_to_device(dev, p);
if (IS_ERR(pdd)) {
- err = PTR_ERR(pdd);
+ err = -ESRCH;
goto out;
}
- default_policy = (args.default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
+ default_policy = (args->default_policy == KFD_IOC_CACHE_POLICY_COHERENT)
? cache_policy_coherent : cache_policy_noncoherent;
alternate_policy =
- (args.alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
+ (args->alternate_policy == KFD_IOC_CACHE_POLICY_COHERENT)
? cache_policy_coherent : cache_policy_noncoherent;
if (!dev->dqm->set_cache_memory_policy(dev->dqm,
&pdd->qpd,
default_policy,
alternate_policy,
- (void __user *)args.alternate_aperture_base,
- args.alternate_aperture_size))
+ (void __user *)args->alternate_aperture_base,
+ args->alternate_aperture_size))
err = -EINVAL;
out:
@@ -422,53 +400,44 @@ out:
return err;
}
-static long kfd_ioctl_get_clock_counters(struct file *filep,
- struct kfd_process *p, void __user *arg)
+static int kfd_ioctl_get_clock_counters(struct file *filep,
+ struct kfd_process *p, void *data)
{
- struct kfd_ioctl_get_clock_counters_args args;
+ struct kfd_ioctl_get_clock_counters_args *args = data;
struct kfd_dev *dev;
struct timespec time;
- if (copy_from_user(&args, arg, sizeof(args)))
- return -EFAULT;
-
- dev = kfd_device_by_id(args.gpu_id);
+ dev = kfd_device_by_id(args->gpu_id);
if (dev == NULL)
return -EINVAL;
/* Reading GPU clock counter from KGD */
- args.gpu_clock_counter = kfd2kgd->get_gpu_clock_counter(dev->kgd);
+ args->gpu_clock_counter = kfd2kgd->get_gpu_clock_counter(dev->kgd);
/* No access to rdtsc. Using raw monotonic time */
getrawmonotonic(&time);
- args.cpu_clock_counter = (uint64_t)timespec_to_ns(&time);
+ args->cpu_clock_counter = (uint64_t)timespec_to_ns(&time);
get_monotonic_boottime(&time);
- args.system_clock_counter = (uint64_t)timespec_to_ns(&time);
+ args->system_clock_counter = (uint64_t)timespec_to_ns(&time);
/* Since the counter is in nano-seconds we use 1GHz frequency */
- args.system_clock_freq = 1000000000;
-
- if (copy_to_user(arg, &args, sizeof(args)))
- return -EFAULT;
+ args->system_clock_freq = 1000000000;
return 0;
}
static int kfd_ioctl_get_process_apertures(struct file *filp,
- struct kfd_process *p, void __user *arg)
+ struct kfd_process *p, void *data)
{
- struct kfd_ioctl_get_process_apertures_args args;
+ struct kfd_ioctl_get_process_apertures_args *args = data;
struct kfd_process_device_apertures *pAperture;
struct kfd_process_device *pdd;
dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
- if (copy_from_user(&args, arg, sizeof(args)))
- return -EFAULT;
-
- args.num_of_nodes = 0;
+ args->num_of_nodes = 0;
mutex_lock(&p->mutex);
@@ -477,7 +446,8 @@ static int kfd_ioctl_get_process_apertures(struct file *filp,
/* Run over all pdd of the process */
pdd = kfd_get_first_process_device_data(p);
do {
- pAperture = &args.process_apertures[args.num_of_nodes];
+ pAperture =
+ &args->process_apertures[args->num_of_nodes];
pAperture->gpu_id = pdd->dev->id;
pAperture->lds_base = pdd->lds_base;
pAperture->lds_limit = pdd->lds_limit;
@@ -487,7 +457,7 @@ static int kfd_ioctl_get_process_apertures(struct file *filp,
pAperture->scratch_limit = pdd->scratch_limit;
dev_dbg(kfd_device,
- "node id %u\n", args.num_of_nodes);
+ "node id %u\n", args->num_of_nodes);
dev_dbg(kfd_device,
"gpu id %u\n", pdd->dev->id);
dev_dbg(kfd_device,
@@ -503,23 +473,23 @@ static int kfd_ioctl_get_process_apertures(struct file *filp,
dev_dbg(kfd_device,
"scratch_limit %llX\n", pdd->scratch_limit);
- args.num_of_nodes++;
+ args->num_of_nodes++;
} while ((pdd = kfd_get_next_process_device_data(p, pdd)) != NULL &&
- (args.num_of_nodes < NUM_OF_SUPPORTED_GPUS));
+ (args->num_of_nodes < NUM_OF_SUPPORTED_GPUS));
}
mutex_unlock(&p->mutex);
- if (copy_to_user(arg, &args, sizeof(args)))
- return -EFAULT;
-
return 0;
}
static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
struct kfd_process *process;
- long err = -EINVAL;
+ 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",
@@ -529,54 +499,84 @@ static long kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
if (IS_ERR(process))
return PTR_ERR(process);
+ if (cmd & (IOC_IN | IOC_OUT)) {
+ if (asize <= sizeof(stack_kdata)) {
+ kdata = stack_kdata;
+ } else {
+ kdata = kmalloc(asize, GFP_KERNEL);
+ if (!kdata) {
+ retcode = -ENOMEM;
+ goto err_i1;
+ }
+ }
+ if (asize > usize)
+ memset(kdata + usize, 0, asize - usize);
+ }
+
+ if (cmd & IOC_IN) {
+ if (copy_from_user(kdata, (void __user *)arg, usize) != 0) {
+ retcode = -EFAULT;
+ goto err_i1;
+ }
+ } else if (cmd & IOC_OUT) {
+ memset(kdata, 0, usize);
+ }
+
+
switch (cmd) {
case KFD_IOC_GET_VERSION:
- err = kfd_ioctl_get_version(filep, process, (void __user *)arg);
+ retcode = kfd_ioctl_get_version(filep, process, kdata);
break;
case KFD_IOC_CREATE_QUEUE:
- err = kfd_ioctl_create_queue(filep, process,
- (void __user *)arg);
+ retcode = kfd_ioctl_create_queue(filep, process,
+ kdata);
break;
case KFD_IOC_DESTROY_QUEUE:
- err = kfd_ioctl_destroy_queue(filep, process,
- (void __user *)arg);
+ retcode = kfd_ioctl_destroy_queue(filep, process,
+ kdata);
break;
case KFD_IOC_SET_MEMORY_POLICY:
- err = kfd_ioctl_set_memory_policy(filep, process,
- (void __user *)arg);
+ retcode = kfd_ioctl_set_memory_policy(filep, process,
+ kdata);
break;
case KFD_IOC_GET_CLOCK_COUNTERS:
- err = kfd_ioctl_get_clock_counters(filep, process,
- (void __user *)arg);
+ retcode = kfd_ioctl_get_clock_counters(filep, process,
+ kdata);
break;
case KFD_IOC_GET_PROCESS_APERTURES:
- err = kfd_ioctl_get_process_apertures(filep, process,
- (void __user *)arg);
+ retcode = kfd_ioctl_get_process_apertures(filep, process,
+ kdata);
break;
case KFD_IOC_UPDATE_QUEUE:
- err = kfd_ioctl_update_queue(filep, process,
- (void __user *)arg);
+ retcode = kfd_ioctl_update_queue(filep, process,
+ kdata);
break;
default:
- dev_err(kfd_device,
+ dev_dbg(kfd_device,
"unknown ioctl cmd 0x%x, arg 0x%lx)\n",
cmd, arg);
- err = -EINVAL;
+ retcode = -EINVAL;
break;
}
- if (err < 0)
- dev_err(kfd_device,
- "ioctl error %ld for ioctl cmd 0x%x (#%d)\n",
- err, cmd, _IOC_NR(cmd));
+ if (cmd & IOC_OUT)
+ if (copy_to_user((void __user *)arg, kdata, usize) != 0)
+ retcode = -EFAULT;
- return err;
+err_i1:
+ if (kdata != stack_kdata)
+ kfree(kdata);
+
+ if (retcode)
+ dev_dbg(kfd_device, "ret = %d\n", retcode);
+
+ return retcode;
}
static int kfd_mmap(struct file *filp, struct vm_area_struct *vma)
--
1.9.1
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