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gpu: nvgpu: Use conftest to handle kernel version differences

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Instead of relying on kernel version to determine if the 'dev' member of
the 'struct class' is const, add a compile time test to the conftest.sh
script to determine this at compile time for the kernel being used. This
is beneficial for working with 3rd party Linux kernels that may have
back-ported upstream changes into their kernel and so the kernel version
checks do not work.

Bug 4119327

Change-Id: I5b3c886fa4bac7560c2c26534bed9f495d57195b
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2986637
(cherry picked from commit f9d48796dc2a292bb02a90677774a5568f9f1651)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2990696
Reviewed-by: Ankur Kishore <ankkishore@nvidia.com>
GVS: Gerrit_Virtual_Submit <buildbot_gerritrpt@nvidia.com>
This commit is contained in:
Jon Hunter
2023-09-08 12:41:03 +01:00
committed by mobile promotions
parent 0fa5fc1583
commit f2afbafcfd
1 changed files with 19 additions and 15 deletions
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34
drivers/gpu/nvgpu/os/linux/ioctl.c
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@@ -16,6 +16,10 @@
* along with this program. If not, see <http://www.gnu.org/licenses/>. * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/ */
#if defined(CONFIG_NVIDIA_CONFTEST)
#include <nvidia/conftest.h>
#endif
#include <linux/file.h> #include <linux/file.h>
#include <linux/slab.h> #include <linux/slab.h>
@@ -222,10 +226,10 @@ static char *nvgpu_devnode(const char *cdev_name)
return kasprintf(GFP_KERNEL, "nvhost-%s-gpu", cdev_name); return kasprintf(GFP_KERNEL, "nvhost-%s-gpu", cdev_name);
} }
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)) #if defined(NV_CLASS_STRUCT_DEVNODE_HAS_CONST_DEV_ARG) /* Linux v6.2 */
static char *nvgpu_pci_devnode(struct device *dev, umode_t *mode)
#else
static char *nvgpu_pci_devnode(const struct device *dev, umode_t *mode) static char *nvgpu_pci_devnode(const struct device *dev, umode_t *mode)
#else
static char *nvgpu_pci_devnode(struct device *dev, umode_t *mode)
#endif #endif
{ {
/* Special case to maintain legacy names */ /* Special case to maintain legacy names */
@@ -238,39 +242,39 @@ static char *nvgpu_pci_devnode(const struct device *dev, umode_t *mode)
dev_name(dev->parent), dev_name(dev)); dev_name(dev->parent), dev_name(dev));
} }
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)) #if defined(NV_CLASS_STRUCT_DEVNODE_HAS_CONST_DEV_ARG) /* Linux v6.2 */
static char *nvgpu_devnode_v2(struct device *dev, umode_t *mode)
#else
static char *nvgpu_devnode_v2(const struct device *dev, umode_t *mode) static char *nvgpu_devnode_v2(const struct device *dev, umode_t *mode)
#else
static char *nvgpu_devnode_v2(struct device *dev, umode_t *mode)
#endif #endif
{ {
return kasprintf(GFP_KERNEL, "nvgpu/igpu0/%s", dev_name(dev)); return kasprintf(GFP_KERNEL, "nvgpu/igpu0/%s", dev_name(dev));
} }
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)) #if defined(NV_CLASS_STRUCT_DEVNODE_HAS_CONST_DEV_ARG) /* Linux v6.2 */
static char *nvgpu_pci_devnode_v2(struct device *dev, umode_t *mode)
#else
static char *nvgpu_pci_devnode_v2(const struct device *dev, umode_t *mode) static char *nvgpu_pci_devnode_v2(const struct device *dev, umode_t *mode)
#else
static char *nvgpu_pci_devnode_v2(struct device *dev, umode_t *mode)
#endif #endif
{ {
return kasprintf(GFP_KERNEL, "nvgpu/dgpu-%s/%s", return kasprintf(GFP_KERNEL, "nvgpu/dgpu-%s/%s",
dev_name(dev->parent), dev_name(dev)); dev_name(dev->parent), dev_name(dev));
} }
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)) #if defined(NV_CLASS_STRUCT_DEVNODE_HAS_CONST_DEV_ARG) /* Linux v6.2 */
static char *nvgpu_pci_igpu_devnode_v2(struct device *dev, umode_t *mode)
#else
static char *nvgpu_pci_igpu_devnode_v2(const struct device *dev, umode_t *mode) static char *nvgpu_pci_igpu_devnode_v2(const struct device *dev, umode_t *mode)
#else
static char *nvgpu_pci_igpu_devnode_v2(struct device *dev, umode_t *mode)
#endif #endif
{ {
return kasprintf(GFP_KERNEL, "nvgpu/igpu-%s/%s", return kasprintf(GFP_KERNEL, "nvgpu/igpu-%s/%s",
dev_name(dev->parent), dev_name(dev)); dev_name(dev->parent), dev_name(dev));
} }
#if (LINUX_VERSION_CODE < KERNEL_VERSION(6, 2, 0)) #if defined(NV_CLASS_STRUCT_DEVNODE_HAS_CONST_DEV_ARG) /* Linux v6.2 */
static char *nvgpu_mig_fgpu_devnode(struct device *dev, umode_t *mode)
#else
static char *nvgpu_mig_fgpu_devnode(const struct device *dev, umode_t *mode) static char *nvgpu_mig_fgpu_devnode(const struct device *dev, umode_t *mode)
#else
static char *nvgpu_mig_fgpu_devnode(struct device *dev, umode_t *mode)
#endif #endif
{ {
struct nvgpu_cdev_class_priv_data *priv_data; struct nvgpu_cdev_class_priv_data *priv_data;