Commit b4cf6a0a authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'nfp-fix-rtsym-and-XPB-register-handling-in-debug-dump'



Simon Horman says:

====================
nfp: fix rtsym and XPB register handling in debug dump

this series resolves two problems in the recently added debug dump facility.

* Correctly handle reading absolute rtysms
* Correctly handle special-case PB register reads

These fixes are for code only present in net-next.
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents 9463b2f7 28b2d7d0
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+39 −18
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@
#include "nfp_main.h"
#include "nfpcore/nfp.h"
#include "nfpcore/nfp_nffw.h"
#include "nfpcore/nfp6000/nfp6000.h"

#define NFP_DUMP_SPEC_RTSYM	"_abi_dump_spec"

@@ -265,6 +266,7 @@ nfp_calc_rtsym_dump_sz(struct nfp_pf *pf, struct nfp_dump_tl *spec)
	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);
@@ -276,8 +278,13 @@ nfp_calc_rtsym_dump_sz(struct nfp_pf *pf, struct nfp_dump_tl *spec)
	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(sym->size);
	       ALIGN8(size);
}

static int
@@ -472,6 +479,12 @@ static int nfp_dump_hwinfo_field(struct nfp_pf *pf, struct nfp_dump_tl *spec,
	return 0;
}

static bool is_xpb_read(struct nfp_dumpspec_cpp_isl_id *cpp_id)
{
	return cpp_id->target == NFP_CPP_TARGET_ISLAND_XPB &&
	       cpp_id->action == 0 && cpp_id->token == 0;
}

static int
nfp_dump_csr_range(struct nfp_pf *pf, struct nfp_dumpspec_csr *spec_csr,
		   struct nfp_dump_state *dump)
@@ -505,8 +518,12 @@ nfp_dump_csr_range(struct nfp_pf *pf, struct nfp_dumpspec_csr *spec_csr,
	max_rd_addr = cpp_rd_addr + be32_to_cpu(spec_csr->cpp.dump_length);

	while (cpp_rd_addr < max_rd_addr) {
		bytes_read = nfp_cpp_read(pf->cpp, cpp_id, cpp_rd_addr, dest,
					  reg_sz);
		if (is_xpb_read(&spec_csr->cpp.cpp_id))
			bytes_read = nfp_xpb_readl(pf->cpp, cpp_rd_addr,
						   (u32 *)dest);
		else
			bytes_read = nfp_cpp_read(pf->cpp, cpp_id, cpp_rd_addr,
						  dest, reg_sz);
		if (bytes_read != reg_sz) {
			if (bytes_read >= 0)
				bytes_read = -EIO;
@@ -654,22 +671,26 @@ nfp_dump_single_rtsym(struct nfp_pf *pf, struct nfp_dumpspec_rtsym *spec,
		header_size - offsetof(struct nfp_dump_rtsym, rtsym);
	memcpy(dump_header->rtsym, spec->rtsym, key_len + 1);

	if (sym->type == NFP_RTSYM_TYPE_ABS) {
		dump_header->cpp.dump_length = cpu_to_be32(sizeof(sym->addr));
		*(u64 *)dest = sym->addr;
	} else {
		cpp_params.target = sym->target;
		cpp_params.action = NFP_CPP_ACTION_RW;
		cpp_params.token  = 0;
		cpp_params.island = sym->domain;
		cpp_id = nfp_get_numeric_cpp_id(&cpp_params);

		dump_header->cpp.cpp_id = cpp_params;
		dump_header->cpp.offset = cpu_to_be32(sym->addr);
		dump_header->cpp.dump_length = cpu_to_be32(sym->size);

	bytes_read = nfp_cpp_read(pf->cpp, cpp_id, sym->addr, dest, sym->size);
		bytes_read = nfp_cpp_read(pf->cpp, cpp_id, sym->addr, 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;
}