gpu: nvgpu: Remove NVGPU_IOCTL_GET_BUFFER_INFO

The IOCTL was introduced for making efficient query of buffer
identity and size. It was never taken into use, and it adds a
dependency to Tegra specific dma_buf API, so remove it.

JIRA NVGPU-4

Change-Id: I194d7bb1f54997900a3be8d39c93331befa225c7
Signed-off-by: Terje Bergstrom <tbergstrom@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1648001
Reviewed-by: Alex Waterman <alexw@nvidia.com>
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: svc-mobile-coverity <svc-mobile-coverity@nvidia.com>
Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>

3 files changed, 2 insertions, 50 deletions

diff --git a/drivers/gpu/nvgpu/common/linux/dmabuf.c b/drivers/gpu/nvgpu/common/linux/dmabuf.c
index 08cf5f2b..580dfcae 100644
--- a/drivers/gpu/nvgpu/common/linux/dmabuf.c
+++ b/drivers/gpu/nvgpu/common/linux/dmabuf.c
@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+* Copyright (c) 2017-2018, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -140,7 +140,6 @@ int gk20a_dmabuf_alloc_drvdata(struct dma_buf *dmabuf, struct device *dev)
 {
         struct gk20a *g = gk20a_get_platform(dev)->g;
         struct gk20a_dmabuf_priv *priv;
-        static u64 priv_count = 0;
 
         priv = dma_buf_get_drvdata(dmabuf, dev);
         if (likely(priv))
@@ -159,7 +158,6 @@ int gk20a_dmabuf_alloc_drvdata(struct dma_buf *dmabuf, struct device *dev)
 
         nvgpu_mutex_init(&priv->lock);
         nvgpu_init_list_node(&priv->states);
-        priv->buffer_id = ++priv_count;
         priv->g = g;
         dma_buf_set_drvdata(dmabuf, dev, priv, gk20a_mm_delete_priv);
 
@@ -214,34 +212,3 @@ out:
                 *state = s;
         return err;
 }
-
-int gk20a_mm_get_buffer_info(struct device *dev, int dmabuf_fd,
-                             u64 *buffer_id, u64 *buffer_len)
-{
-        struct dma_buf *dmabuf;
-        struct gk20a_dmabuf_priv *priv;
-        int err = 0;
-
-        dmabuf = dma_buf_get(dmabuf_fd);
-        if (IS_ERR(dmabuf)) {
-                dev_warn(dev, "%s: fd %d is not a dmabuf", __func__, dmabuf_fd);
-                return PTR_ERR(dmabuf);
-        }
-
-        err = gk20a_dmabuf_alloc_drvdata(dmabuf, dev);
-        if (err) {
-                dev_warn(dev, "Failed to allocate dmabuf drvdata (err = %d)",
-                         err);
-                goto clean_up;
-        }
-
-        priv = dma_buf_get_drvdata(dmabuf, dev);
-        if (likely(priv)) {
-                *buffer_id = priv->buffer_id;
-                *buffer_len = dmabuf->size;
-        }
-
-clean_up:
-        dma_buf_put(dmabuf);
-        return err;
-}
diff --git a/drivers/gpu/nvgpu/common/linux/dmabuf.h b/drivers/gpu/nvgpu/common/linux/dmabuf.h
index 8e6c139b..d30ff5a5 100644
--- a/drivers/gpu/nvgpu/common/linux/dmabuf.h
+++ b/drivers/gpu/nvgpu/common/linux/dmabuf.h
@@ -1,5 +1,5 @@
 /*
-* Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+* Copyright (c) 2017-2018, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -57,7 +57,4 @@ int gk20a_dmabuf_alloc_drvdata(struct dma_buf *dmabuf, struct device *dev);
 int gk20a_dmabuf_get_state(struct dma_buf *dmabuf, struct gk20a *g,
                            u64 offset, struct gk20a_buffer_state **state);
 
-int gk20a_mm_get_buffer_info(struct device *dev, int dmabuf_fd,
-                             u64 *buffer_id, u64 *buffer_len);
-
 #endif
diff --git a/drivers/gpu/nvgpu/common/linux/ioctl_ctrl.c b/drivers/gpu/nvgpu/common/linux/ioctl_ctrl.c
index ebbe7dda..b751a337 100644
--- a/drivers/gpu/nvgpu/common/linux/ioctl_ctrl.c
+++ b/drivers/gpu/nvgpu/common/linux/ioctl_ctrl.c
@@ -753,13 +753,6 @@ static int gk20a_ctrl_vsm_mapping(struct gk20a *g,
         return err;
 }
 
-static int gk20a_ctrl_get_buffer_info(
-        struct gk20a *g, struct nvgpu_gpu_get_buffer_info_args *args)
-{
-        return gk20a_mm_get_buffer_info(dev_from_gk20a(g), args->in.dmabuf_fd,
-                                        &args->out.id, &args->out.length);
-}
-
 static int nvgpu_gpu_get_cpu_time_correlation_info(
         struct gk20a *g,
         struct nvgpu_gpu_get_cpu_time_correlation_info_args *args)
@@ -1757,11 +1750,6 @@ long gk20a_ctrl_dev_ioctl(struct file *filp, unsigned int cmd, unsigned long arg
                         (struct nvgpu_gpu_vsms_mapping *)buf);
                 break;
 
-        case NVGPU_GPU_IOCTL_GET_BUFFER_INFO:
-                err = gk20a_ctrl_get_buffer_info(g,
-                        (struct nvgpu_gpu_get_buffer_info_args *)buf);
-                break;
-
         case NVGPU_GPU_IOCTL_GET_CPU_TIME_CORRELATION_INFO:
                 err = nvgpu_gpu_get_cpu_time_correlation_info(g,
                         (struct nvgpu_gpu_get_cpu_time_correlation_info_args *)buf);