Enable the possibility to expose a GPU memory area and make it
accessible from the CPU.
GPU memory has to be allocated via rte_gpu_mem_alloc().
This patch allows the gpudev library to map (and unmap),
through the GPU driver, a chunk of GPU memory and to return
a memory pointer usable by the CPU to access the GPU memory area.
Signed-off-by: Elena Agostini <eagostini@nvidia.com>
Similarly to rte_malloc, rte_gpu_mem_alloc accepts as
input the memory alignment size.
GPU driver should return GPU memory address aligned
with the input value.
Signed-off-by: Elena Agostini <eagostini@nvidia.com>
Memory list cleanup (called by cuda_mem_free)
was not properly set the new head of the list
when deleting an entry.
Fixes: 1306a73b19 ("gpu/cuda: introduce CUDA driver")
Cc: stable@dpdk.org
Signed-off-by: Elena Agostini <eagostini@nvidia.com>
Set correct rte_errno variable in CUDA driver
and return -rte_errno in case of error.
rte_errno values are compliant with the gpudev library documentation.
Fixes: 1306a73b19 ("gpu/cuda: introduce CUDA driver")
Signed-off-by: Elena Agostini <eagostini@nvidia.com>
The gpudev functions free, register and unregister
return gracefully if input pointer is NULL or size 0,
as API doc was indicating no-op accepted values.
CUDA driver checks are removed because redundant
with the checks added in gpudev library.
Fixes: e818c4e2bf ("gpudev: add memory API")
Signed-off-by: Elena Agostini <eagostini@nvidia.com>
This is the CUDA implementation of the gpudev library.
Functionalities implemented through CUDA Driver API are:
- Device probe and remove
- Manage device memory allocations
- Register/unregister external CPU memory in the device memory area
Signed-off-by: Elena Agostini <eagostini@nvidia.com>
