nv-tegra-mirror/linux-nvgpu
1
0
Fork 0
mirror of git://nv-tegra.nvidia.com/linux-nvgpu.git synced 2025-12-22 17:36:20 +03:00
Code Issues Packages Projects Releases Wiki Activity

gpu: nvgpu: add ioctl to configure l2 max_ways_evict_last

Browse Source 
Add ioctl support to configure and read the max number of lines/ways
in a L2 cache set that can be marked as EVICT_LAST. This is accomplished
through two new ltc hals: set_l2_max_ways_evict_last,
get_l2_max_ways_evict_last. These hals will only be set for nvgpu-next
chips. Incase of legacy chips, the IOCTLs will return error -ENOSYS.

Generate following litter constants to get the number of sets in a l2
slice and the number of ways in each set:
- GPU_LIT_NUM_LTC_LTS_SETS
- GPU_LIT_NUM_LTC_LTS_WAYS

Add gpu characteritics flag: NVGPU_L2_MAX_WAYS_EVICT_LAST_ENABLED to
allow userspace driver to determine if L2_MAX_WAYS_EVICT_LAST ioctl is
supported.

Bug 200605474

Change-Id: Id3180f891399f5e128500f3835d762aee59953e0
Signed-off-by: Antony Clince Alex <aalex@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2445884
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Antony Clince Alex
2020-11-13 14:50:51 +05:30
committed by mobile promotions
parent fe03443161
commit f41e5975d8
11 changed files with 104 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
include/uapi/linux/nvgpu-ctrl.h
View File

@@ -184,6 +184,8 @@ struct nvgpu_gpu_zbc_query_table_args {
#define NVGPU_GPU_FLAGS_SUPPORT_GET_GR_CONTEXT (1ULL << 49)
/* Additional buffer metadata association supported */
#define NVGPU_GPU_FLAGS_SUPPORT_BUFFER_METADATA (1ULL << 50)
/* Flag to indicate whether configuring L2_MAXEVICTLAST_WAYS is supported */
#define NVGPU_GPU_FLAGS_L2_MAX_WAYS_EVICT_LAST_ENABLED (1ULL << 51)
/* SM LRF ECC is enabled */
#define NVGPU_GPU_FLAGS_ECC_ENABLED_SM_LRF (1ULL << 60)
/* SM SHM ECC is enabled */

21
include/uapi/linux/nvgpu.h
View File

@@ -72,6 +72,18 @@ struct nvgpu_tsg_read_single_sm_error_state_args {
__u64 record_size;
};
/*
* This struct is used to read and configure l2 max evict_last
* setting.
*/
struct nvgpu_tsg_l2_max_ways_evict_last_args {
/*
* Maximum number of ways in a l2 cache set that can be allocated
* with eviction_policy=EVICT_LAST
*/
__u32 max_ways;
};
#define NVGPU_TSG_IOCTL_BIND_CHANNEL \
_IOW(NVGPU_TSG_IOCTL_MAGIC, 1, int)
#define NVGPU_TSG_IOCTL_UNBIND_CHANNEL \
@@ -95,10 +107,17 @@ struct nvgpu_tsg_read_single_sm_error_state_args {
#define NVGPU_TSG_IOCTL_READ_SINGLE_SM_ERROR_STATE \
_IOWR(NVGPU_TSG_IOCTL_MAGIC, 12, \
struct nvgpu_tsg_read_single_sm_error_state_args)
#define NVGPU_TSG_IOCTL_SET_L2_MAX_WAYS_EVICT_LAST \
_IOW(NVGPU_TSG_IOCTL_MAGIC, 13, \
struct nvgpu_tsg_l2_max_ways_evict_last_args)
#define NVGPU_TSG_IOCTL_GET_L2_MAX_WAYS_EVICT_LAST \
_IOR(NVGPU_TSG_IOCTL_MAGIC, 14, \
struct nvgpu_tsg_l2_max_ways_evict_last_args)
#define NVGPU_TSG_IOCTL_MAX_ARG_SIZE \
sizeof(struct nvgpu_tsg_bind_channel_ex_args)
#define NVGPU_TSG_IOCTL_LAST \
_IOC_NR(NVGPU_TSG_IOCTL_READ_SINGLE_SM_ERROR_STATE)
_IOC_NR(NVGPU_TSG_IOCTL_GET_L2_MAX_WAYS_EVICT_LAST)
/*
* /dev/nvhost-dbg-gpu device