nfp: keep MIP object around

Microcode Information Page contains some useful information, like
application firmware build name.  Keep it around, similar to RTSym
and HWInfo.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/nfp_main.c

@@ -375,7 +375,8 @@ static int nfp_pci_probe(struct pci_dev *pdev,
 	if (err)
 		goto err_devlink_unreg;
 
-	pf->rtbl = nfp_rtsym_table_read(pf->cpp);
+	pf->mip = nfp_mip_open(pf->cpp);
+	pf->rtbl = __nfp_rtsym_table_read(pf->cpp, pf->mip);
 
 	err = nfp_pcie_sriov_read_nfd_limit(pf);
 	if (err)
@@ -399,6 +400,7 @@ static int nfp_pci_probe(struct pci_dev *pdev,
 	pci_sriov_set_totalvfs(pf->pdev, 0);
 err_fw_unload:
 	kfree(pf->rtbl);
+	nfp_mip_close(pf->mip);
 	if (pf->fw_loaded)
 		nfp_fw_unload(pf);
 	kfree(pf->eth_tbl);
@@ -437,6 +439,7 @@ static void nfp_pci_remove(struct pci_dev *pdev)
 	devlink_unregister(devlink);
 
 	kfree(pf->rtbl);
+	nfp_mip_close(pf->mip);
 	if (pf->fw_loaded)
 		nfp_fw_unload(pf);
 

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

@@ -55,6 +55,7 @@ struct nfp_cpp;
 struct nfp_cpp_area;
 struct nfp_eth_table;
 struct nfp_hwinfo;
+struct nfp_mip;
 struct nfp_net;
 struct nfp_nsp_identify;
 struct nfp_rtsym_table;
@@ -72,6 +73,7 @@ struct nfp_rtsym_table;
  * @num_vfs:		Number of SR-IOV VFs enabled
  * @fw_loaded:		Is the firmware loaded?
  * @ctrl_vnic:		Pointer to the control vNIC if available
+ * @mip:		MIP handle
  * @rtbl:		RTsym table
  * @hwinfo:		HWInfo table
  * @eth_tbl:		NSP ETH table
@@ -105,6 +107,7 @@ struct nfp_pf {
 
 	struct nfp_net *ctrl_vnic;
 
+	const struct nfp_mip *mip;
 	struct nfp_rtsym_table *rtbl;
 	struct nfp_hwinfo *hwinfo;
 	struct nfp_eth_table *eth_tbl;

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

@@ -90,6 +90,8 @@ struct nfp_rtsym {
 struct nfp_rtsym_table;
 
 struct nfp_rtsym_table *nfp_rtsym_table_read(struct nfp_cpp *cpp);
+struct nfp_rtsym_table *
+__nfp_rtsym_table_read(struct nfp_cpp *cpp, const struct nfp_mip *mip);
 int nfp_rtsym_count(struct nfp_rtsym_table *rtbl);
 const struct nfp_rtsym *nfp_rtsym_get(struct nfp_rtsym_table *rtbl, int idx);
 const struct nfp_rtsym *

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

@@ -108,22 +108,32 @@ nfp_rtsym_sw_entry_init(struct nfp_rtsym_table *cache, u32 strtab_size,
 }
 
 struct nfp_rtsym_table *nfp_rtsym_table_read(struct nfp_cpp *cpp)
+{
+	struct nfp_rtsym_table *rtbl;
+	const struct nfp_mip *mip;
+
+	mip = nfp_mip_open(cpp);
+	rtbl = __nfp_rtsym_table_read(cpp, mip);
+	nfp_mip_close(mip);
+
+	return rtbl;
+}
+
+struct nfp_rtsym_table *
+__nfp_rtsym_table_read(struct nfp_cpp *cpp, const struct nfp_mip *mip)
 {
 	const u32 dram = NFP_CPP_ID(NFP_CPP_TARGET_MU, NFP_CPP_ACTION_RW, 0) |
 		NFP_ISL_EMEM0;
 	u32 strtab_addr, symtab_addr, strtab_size, symtab_size;
 	struct nfp_rtsym_entry *rtsymtab;
 	struct nfp_rtsym_table *cache;
-	const struct nfp_mip *mip;
 	int err, n, size;
 
-	mip = nfp_mip_open(cpp);
 	if (!mip)
 		return NULL;
 
 	nfp_mip_strtab(mip, &strtab_addr, &strtab_size);
 	nfp_mip_symtab(mip, &symtab_addr, &symtab_size);
-	nfp_mip_close(mip);
 
 	if (!symtab_size || !strtab_size || symtab_size % sizeof(*rtsymtab))
 		return NULL;