nfp: add support for service processor access

NFP Service Processor (NSP) is an ARM core inside the chip which
is responsible for management and control functions.  Add support
for chip reset, FW load and external module access using the NSP.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/Makefile

@@ -7,6 +7,8 @@ nfp-objs := \
 	    nfpcore/nfp_hwinfo.o \
 	    nfpcore/nfp_mip.o \
 	    nfpcore/nfp_nffw.o \
+	    nfpcore/nfp_nsp.o \
+	    nfpcore/nfp_nsp_eth.o \
 	    nfpcore/nfp_resource.o \
 	    nfpcore/nfp_rtsym.o \
 	    nfpcore/nfp_target.o \

drivers/net/ethernet/netronome/nfp/nfpcore/nfp.h

@@ -47,6 +47,20 @@
 
 const char *nfp_hwinfo_lookup(struct nfp_cpp *cpp, const char *lookup);
 
+/* Implemented in nfp_nsp.c */
+
+struct nfp_nsp;
+struct firmware;
+
+struct nfp_nsp *nfp_nsp_open(struct nfp_cpp *cpp);
+void nfp_nsp_close(struct nfp_nsp *state);
+int nfp_nsp_wait(struct nfp_nsp *state);
+int nfp_nsp_device_soft_reset(struct nfp_nsp *state);
+int nfp_nsp_load_fw(struct nfp_nsp *state, const struct firmware *fw);
+int nfp_nsp_read_eth_table(struct nfp_nsp *state, void *buf, unsigned int size);
+int nfp_nsp_write_eth_table(struct nfp_nsp *state,
+			    const void *buf, unsigned int size);
+
 /* Implemented in nfp_resource.c */
 
 #define NFP_RESOURCE_TBL_TARGET		NFP_CPP_TARGET_MU

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cpp.h

@@ -224,6 +224,8 @@ void nfp_hwinfo_cache_set(struct nfp_cpp *cpp, void *val);
 void *nfp_rtsym_cache(struct nfp_cpp *cpp);
 void nfp_rtsym_cache_set(struct nfp_cpp *cpp, void *val);
 
+void nfp_nffw_cache_flush(struct nfp_cpp *cpp);
+
 struct nfp_cpp_area *nfp_cpp_area_alloc_with_name(struct nfp_cpp *cpp,
 						  u32 cpp_id,
 						  const char *name,

drivers/net/ethernet/netronome/nfp/nfpcore/nfp_cppcore.c

@@ -304,6 +304,19 @@ void nfp_rtsym_cache_set(struct nfp_cpp *cpp, void *val)
 	cpp->rtsym = val;
 }
 
+/**
+ * nfp_nffw_cache_flush() - Flush cached firmware information
+ * @cpp:	NFP CPP handle
+ *
+ * Flush cached firmware information.  This function should be called
+ * every time firmware is loaded on unloaded.
+ */
+void nfp_nffw_cache_flush(struct nfp_cpp *cpp)
+{
+	kfree(nfp_rtsym_cache(cpp));
+	nfp_rtsym_cache_set(cpp, NULL);
+}
+
 /**
  * nfp_cpp_area_alloc_with_name() - allocate a new CPP area
  * @cpp:	CPP device handle