From: Jakub Kicinski <jakub.kicinski@netronome.com>
Date: Tue, 28 Aug 2018 13:20:47 -0700
Subject: nfp: make RTsym users handle absolute symbols correctly
Patch-mainline: v4.20-rc1
Git-commit: 4152e58cb8c5cd390989f1e96092bce92c27c67a
References: bsc#1109837

Make the RTsym users access the size via the helper, which
takes care of special handling of absolute symbols.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Francois H. Theron <francois.theron@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/netronome/nfp/abm/ctrl.c          |    4 -
 drivers/net/ethernet/netronome/nfp/nfp_main.c          |    6 +-
 drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c |   43 ++++++-----------
 3 files changed, 21 insertions(+), 32 deletions(-)

--- a/drivers/net/ethernet/netronome/nfp/abm/ctrl.c
+++ b/drivers/net/ethernet/netronome/nfp/abm/ctrl.c
@@ -280,10 +280,10 @@ nfp_abm_ctrl_find_rtsym(struct nfp_pf *p
 		nfp_err(pf->cpp, "Symbol '%s' not found\n", name);
 		return ERR_PTR(-ENOENT);
 	}
-	if (sym->size != size) {
+	if (nfp_rtsym_size(sym) != size) {
 		nfp_err(pf->cpp,
 			"Symbol '%s' wrong size: expected %u got %llu\n",
-			name, size, sym->size);
+			name, size, nfp_rtsym_size(sym));
 		return ERR_PTR(-EINVAL);
 	}
 
--- a/drivers/net/ethernet/netronome/nfp/nfp_main.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_main.c
@@ -124,7 +124,7 @@ int nfp_mbox_cmd(struct nfp_pf *pf, u32
 	if (!pf->mbox)
 		return -EOPNOTSUPP;
 
-	max_data_sz = pf->mbox->size - NFP_MBOX_SYM_MIN_SIZE;
+	max_data_sz = nfp_rtsym_size(pf->mbox) - NFP_MBOX_SYM_MIN_SIZE;
 
 	/* Check if cmd field is clear */
 	err = nfp_rtsym_readl(pf->cpp, pf->mbox, NFP_MBOX_CMD, &val);
@@ -566,9 +566,9 @@ static int nfp_pf_find_rtsyms(struct nfp
 	/* Optional per-PCI PF mailbox */
 	snprintf(pf_symbol, sizeof(pf_symbol), NFP_MBOX_SYM_NAME, pf_id);
 	pf->mbox = nfp_rtsym_lookup(pf->rtbl, pf_symbol);
-	if (pf->mbox && pf->mbox->size < NFP_MBOX_SYM_MIN_SIZE) {
+	if (pf->mbox && nfp_rtsym_size(pf->mbox) < NFP_MBOX_SYM_MIN_SIZE) {
 		nfp_err(pf->cpp, "PF mailbox symbol too small: %llu < %d\n",
-			pf->mbox->size, NFP_MBOX_SYM_MIN_SIZE);
+			nfp_rtsym_size(pf->mbox), NFP_MBOX_SYM_MIN_SIZE);
 		return -EINVAL;
 	}
 
--- a/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c
+++ b/drivers/net/ethernet/netronome/nfp/nfp_net_debugdump.c
@@ -188,21 +188,21 @@ nfp_net_dump_load_dumpspec(struct nfp_cp
 	const struct nfp_rtsym *specsym;
 	struct nfp_dumpspec *dumpspec;
 	int bytes_read;
+	u64 sym_size;
 
 	specsym = nfp_rtsym_lookup(rtbl, NFP_DUMP_SPEC_RTSYM);
 	if (!specsym)
 		return NULL;
+	sym_size = nfp_rtsym_size(specsym);
 
 	/* expected size of this buffer is in the order of tens of kilobytes */
-	dumpspec = vmalloc(sizeof(*dumpspec) + specsym->size);
+	dumpspec = vmalloc(sizeof(*dumpspec) + sym_size);
 	if (!dumpspec)
 		return NULL;
+	dumpspec->size = sym_size;
 
-	dumpspec->size = specsym->size;
-
-	bytes_read = nfp_rtsym_read(cpp, specsym, 0, dumpspec->data,
-				    specsym->size);
-	if (bytes_read != specsym->size) {
+	bytes_read = nfp_rtsym_read(cpp, specsym, 0, dumpspec->data, sym_size);
+	if (bytes_read != sym_size) {
 		vfree(dumpspec);
 		nfp_warn(cpp, "Debug dump specification read failed.\n");
 		return NULL;
@@ -262,7 +262,6 @@ nfp_calc_rtsym_dump_sz(struct nfp_pf *pf
 	struct nfp_dumpspec_rtsym *spec_rtsym;
 	const struct nfp_rtsym *sym;
 	u32 tl_len, key_len;
-	u32 size;
 
 	spec_rtsym = (struct nfp_dumpspec_rtsym *)spec;
 	tl_len = be32_to_cpu(spec->length);
@@ -274,13 +273,8 @@ nfp_calc_rtsym_dump_sz(struct nfp_pf *pf
 	if (!sym)
 		return nfp_dump_error_tlv_size(spec);
 
-	if (sym->type == NFP_RTSYM_TYPE_ABS)
-		size = sizeof(sym->addr);
-	else
-		size = sym->size;
-
 	return ALIGN8(offsetof(struct nfp_dump_rtsym, rtsym) + key_len + 1) +
-	       ALIGN8(size);
+	       ALIGN8(nfp_rtsym_size(sym));
 }
 
 static int
@@ -652,11 +646,7 @@ nfp_dump_single_rtsym(struct nfp_pf *pf,
 	if (!sym)
 		return nfp_dump_error_tlv(&spec->tl, -ENOENT, dump);
 
-	if (sym->type == NFP_RTSYM_TYPE_ABS)
-		sym_size = sizeof(sym->addr);
-	else
-		sym_size = sym->size;
-
+	sym_size = nfp_rtsym_size(sym);
 	header_size =
 		ALIGN8(offsetof(struct nfp_dump_rtsym, rtsym) + key_len + 1);
 	total_size = header_size + ALIGN8(sym_size);
@@ -671,21 +661,20 @@ nfp_dump_single_rtsym(struct nfp_pf *pf,
 	memcpy(dump_header->rtsym, spec->rtsym, key_len + 1);
 	dump_header->cpp.dump_length = cpu_to_be32(sym_size);
 
-	if (sym->type == NFP_RTSYM_TYPE_ABS) {
-		*(u64 *)dest = sym->addr;
-	} else {
+	if (sym->type != NFP_RTSYM_TYPE_ABS) {
 		cpp_params.target = sym->target;
 		cpp_params.action = NFP_CPP_ACTION_RW;
 		cpp_params.token  = 0;
 		cpp_params.island = sym->domain;
 		dump_header->cpp.cpp_id = cpp_params;
 		dump_header->cpp.offset = cpu_to_be32(sym->addr);
-		bytes_read = nfp_rtsym_read(pf->cpp, sym, 0, dest, sym_size);
-		if (bytes_read != sym_size) {
-			if (bytes_read >= 0)
-				bytes_read = -EIO;
-			dump_header->error = cpu_to_be32(bytes_read);
-		}
+	}
+
+	bytes_read = nfp_rtsym_read(pf->cpp, sym, 0, dest, sym_size);
+	if (bytes_read != sym_size) {
+		if (bytes_read >= 0)
+			bytes_read = -EIO;
+		dump_header->error = cpu_to_be32(bytes_read);
 	}
 
 	return 0;