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Date: Sun, 20 Jul 2014 19:09:17 -0400
From: Jerome Glisse <j.glisse@...il.com>
To: Oded Gabbay <oded.gabbay@....com>
Cc: David Airlie <airlied@...ux.ie>,
Alex Deucher <alexdeucher@...il.com>,
Andrew Morton <akpm@...ux-foundation.org>,
John Bridgman <John.Bridgman@....com>,
Joerg Roedel <joro@...tes.org>,
Andrew Lewycky <Andrew.Lewycky@....com>,
Christian König <deathsimple@...afone.de>,
Michel Dänzer <michel.daenzer@....com>,
Ben Goz <Ben.Goz@....com>,
Alexey Skidanov <Alexey.Skidanov@....com>,
Evgeny Pinchuk <Evgeny.Pinchuk@....com>,
Alex Deucher <alexander.deucher@....com>,
Christian König <christian.koenig@....com>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 21/25] amdkfd: Implement the create/destroy/update
queue IOCTLs
On Thu, Jul 17, 2014 at 04:29:28PM +0300, Oded Gabbay wrote:
> From: Ben Goz <ben.goz@....com>
>
> Signed-off-by: Ben Goz <ben.goz@....com>
> Signed-off-by: Oded Gabbay <oded.gabbay@....com>
> ---
> drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c | 133 +++++++++++++++++++++++++++-
> drivers/gpu/drm/radeon/amdkfd/kfd_priv.h | 8 ++
> 2 files changed, 138 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c b/drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c
> index d6580a6..a74693a 100644
> --- a/drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c
> +++ b/drivers/gpu/drm/radeon/amdkfd/kfd_chardev.c
> @@ -119,17 +119,144 @@ static int kfd_open(struct inode *inode, struct file *filep)
>
> static long kfd_ioctl_create_queue(struct file *filep, struct kfd_process *p, void __user *arg)
> {
> - return -ENODEV;
> + struct kfd_ioctl_create_queue_args args;
> + struct kfd_dev *dev;
> + int err = 0;
> + unsigned int queue_id;
> + struct kfd_process_device *pdd;
> + struct queue_properties q_properties;
> +
> + memset(&q_properties, 0, sizeof(struct queue_properties));
> +
> + if (copy_from_user(&args, arg, sizeof(args)))
> + return -EFAULT;
> +
> + if (!access_ok(VERIFY_WRITE, args.read_pointer_address, sizeof(qptr_t))) {
> + pr_err("kfd: can't access read pointer");
> + return -EFAULT;
> + }
> +
> + if (!access_ok(VERIFY_WRITE, args.write_pointer_address, sizeof(qptr_t))) {
> + pr_err("kfd: can't access write pointer");
> + return -EFAULT;
> + }
> +
> + q_properties.is_interop = false;
> + q_properties.queue_percent = args.queue_percentage;
> + q_properties.priority = args.queue_priority;
> + q_properties.queue_address = args.ring_base_address;
> + q_properties.queue_size = args.ring_size;
> + q_properties.read_ptr = (qptr_t *) args.read_pointer_address;
> + q_properties.write_ptr = (qptr_t *) args.write_pointer_address;
> +
So there is still no sanity check on any of the argument especialy the queue_size.
I might have missed it, if so i think it really should be here inside the ioctl
function as is simpler to find.
> +
> + pr_debug("%s Arguments: Queue Percentage (%d, %d)\n"
> + "Queue Priority (%d, %d)\n"
> + "Queue Address (0x%llX, 0x%llX)\n"
> + "Queue Size (0x%llX, %u)\n"
> + "Queue r/w Pointers (0x%llX, 0x%llX)\n",
> + __func__,
> + q_properties.queue_percent, args.queue_percentage,
> + q_properties.priority, args.queue_priority,
> + q_properties.queue_address, args.ring_base_address,
> + q_properties.queue_size, args.ring_size,
> + (uint64_t) q_properties.read_ptr,
> + (uint64_t) q_properties.write_ptr);
One pr_debug call perline.
> +
> + dev = kfd_device_by_id(args.gpu_id);
> + if (dev == NULL)
> + return -EINVAL;
> +
> + mutex_lock(&p->mutex);
> +
> + pdd = kfd_bind_process_to_device(dev, p);
> + if (IS_ERR(pdd) < 0) {
> + err = PTR_ERR(pdd);
> + goto err_bind_process;
> + }
> +
> + pr_debug("kfd: creating queue for PASID %d on GPU 0x%x\n",
> + p->pasid,
> + dev->id);
> +
> + err = pqm_create_queue(&p->pqm, dev, filep, &q_properties, 0, KFD_QUEUE_TYPE_COMPUTE, &queue_id);
> + if (err != 0)
> + goto err_create_queue;
> +
> + args.queue_id = queue_id;
> + args.doorbell_address = (uint64_t)q_properties.doorbell_ptr;
> +
> + if (copy_to_user(arg, &args, sizeof(args))) {
> + err = -EFAULT;
> + goto err_copy_args_out;
> + }
> +
> + mutex_unlock(&p->mutex);
> +
> + pr_debug("kfd: queue id %d was created successfully.\n"
> + " ring buffer address == 0x%016llX\n"
> + " read ptr address == 0x%016llX\n"
> + " write ptr address == 0x%016llX\n"
> + " doorbell address == 0x%016llX\n",
> + args.queue_id,
> + args.ring_base_address,
> + args.read_pointer_address,
> + args.write_pointer_address,
> + args.doorbell_address);
> +
Ditto
> + return 0;
> +
> +err_copy_args_out:
> + pqm_destroy_queue(&p->pqm, queue_id);
> +err_create_queue:
> +err_bind_process:
> + mutex_unlock(&p->mutex);
> + return err;
> }
>
> static int kfd_ioctl_destroy_queue(struct file *filp, struct kfd_process *p, void __user *arg)
> {
> - return -ENODEV;
> + int retval;
> + struct kfd_ioctl_destroy_queue_args args;
> +
> + if (copy_from_user(&args, arg, sizeof(args)))
> + return -EFAULT;
> +
> + pr_debug("kfd: destroying queue id %d for PASID %d\n",
> + args.queue_id,
> + p->pasid);
> +
> + mutex_lock(&p->mutex);
> +
> + 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)
> {
> - return -ENODEV;
> + int retval;
> + struct kfd_ioctl_update_queue_args args;
> + struct queue_properties properties;
> +
> + if (copy_from_user(&args, arg, sizeof(args)))
> + return -EFAULT;
> +
> + properties.queue_address = args.ring_base_address;
> + properties.queue_size = args.ring_size;
> + properties.queue_percent = args.queue_percentage;
> + properties.priority = args.queue_priority;
> +
Would need sanity check on argument.
> + pr_debug("kfd: updating queue id %d for PASID %d\n", args.queue_id, p->pasid);
> +
> + mutex_lock(&p->mutex);
> +
> + 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)
> diff --git a/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h b/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h
> index 8a1de68..7ea0e81 100644
> --- a/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h
> +++ b/drivers/gpu/drm/radeon/amdkfd/kfd_priv.h
> @@ -418,7 +418,15 @@ struct process_queue_node {
>
> int pqm_init(struct process_queue_manager *pqm, struct kfd_process *p);
> void pqm_uninit(struct process_queue_manager *pqm);
> +int pqm_create_queue(struct process_queue_manager *pqm,
> + struct kfd_dev *dev,
> + struct file *f,
> + struct queue_properties *properties,
> + unsigned int flags,
> + enum kfd_queue_type type,
> + unsigned int *qid);
> int pqm_destroy_queue(struct process_queue_manager *pqm, unsigned int qid);
> +int pqm_update_queue(struct process_queue_manager *pqm, unsigned int qid, struct queue_properties *p);
>
> /* Packet Manager */
>
> --
> 1.9.1
>
--
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