nfp: add nfp_cpp_area_size() accessor

Allow users outside of core reading area sizes.  This was not needed
previously because whatever entity created the area would usually know
what size it asked for.  The nfp_rtsym_map() helper, however, will
allocate the area based on the size of an RT-symbol with given name.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>

diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h
index 5798adc57cbc9962ec36a74e4f133c5c22d5c78c..c8f2c064cce37cf96a13444927d0959314fe6afd 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h
@@ -242,6 +242,7 @@ int nfp_cpp_area_read(struct nfp_cpp_area *area, unsigned long offset,
                      void *buffer, size_t length);
 int nfp_cpp_area_write(struct nfp_cpp_area *area, unsigned long offset,
                       const void *buffer, size_t length);
+size_t nfp_cpp_area_size(struct nfp_cpp_area *area);
 const char *nfp_cpp_area_name(struct nfp_cpp_area *cpp_area);
 void *nfp_cpp_area_priv(struct nfp_cpp_area *cpp_area);
 struct nfp_cpp *nfp_cpp_area_cpp(struct nfp_cpp_area *cpp_area);

diff --git a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
index 3fcb522d2e85202cd2308243dbb4fe32c9874243..28262470dabfad129a69db6747410f2474f84027 100644 (file)
--- a/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
+++ b/drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c
@@ -567,6 +567,17 @@ int nfp_cpp_area_write(struct nfp_cpp_area *area,
        return area->cpp->op->area_write(area, kernel_vaddr, offset, length);
 }
 
+/**
+ * nfp_cpp_area_size() - return size of a CPP area
+ * @cpp_area:  CPP area handle
+ *
+ * Return: Size of the area
+ */
+size_t nfp_cpp_area_size(struct nfp_cpp_area *cpp_area)
+{
+       return cpp_area->size;
+}
+
 /**
  * nfp_cpp_area_name() - return name of a CPP area
  * @cpp_area:  CPP area handle