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nfp: add extended error messages

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Allow NSP to set option code even when error is reported.  This provides
a way for NSP to give user more precise information about why command
failed.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2017-04-04 16:12:33 -07:00 committed by David S. Miller
parent e890ae8e49
commit 85eb97dd2f
1 changed files with 29 additions and 8 deletions
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37
drivers/net/ethernet/netronome/nfp/nfpcore/nfp_nsp.c
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@ -97,6 +97,13 @@ enum nfp_nsp_cmd {
__MAX_SPCODE,
};
static const struct {
int code;
const char *msg;
} nsp_errors[] = {
{ 0, "success" } /* placeholder to avoid warnings */
};
struct nfp_nsp {
struct nfp_cpp *cpp;
struct nfp_resource *res;
@ -149,6 +156,18 @@ void nfp_nsp_config_clear_state(struct nfp_nsp *state)
state->idx = 0;
}
static void nfp_nsp_print_extended_error(struct nfp_nsp *state, u32 ret_val)
{
int i;
if (!ret_val)
return;
for (i = 0; i < ARRAY_SIZE(nsp_errors); i++)
if (ret_val == nsp_errors[i].code)
nfp_err(state->cpp, "err msg: %s\n", nsp_errors[i].msg);
}
static int nfp_nsp_check(struct nfp_nsp *state)
{
struct nfp_cpp *cpp = state->cpp;
@ -282,7 +301,7 @@ nfp_nsp_wait_reg(struct nfp_cpp *cpp, u64 *reg,
static int nfp_nsp_command(struct nfp_nsp *state, u16 code, u32 option,
u32 buff_cpp, u64 buff_addr)
{
u64 reg, nsp_base, nsp_buffer, nsp_status, nsp_command;
u64 reg, ret_val, nsp_base, nsp_buffer, nsp_status, nsp_command;
struct nfp_cpp *cpp = state->cpp;
u32 nsp_cpp;
int err;
@ -335,18 +354,20 @@ static int nfp_nsp_command(struct nfp_nsp *state, u16 code, u32 option,
return err;
}
err = nfp_cpp_readq(cpp, nsp_cpp, nsp_command, &ret_val);
if (err < 0)
return err;
ret_val = FIELD_GET(NSP_COMMAND_OPTION, ret_val);
err = FIELD_GET(NSP_STATUS_RESULT, reg);
if (err) {
nfp_warn(cpp, "Result (error) code set: %d command: %d\n",
-err, code);
nfp_warn(cpp, "Result (error) code set: %d (%d) command: %d\n",
-err, (int)ret_val, code);
nfp_nsp_print_extended_error(state, ret_val);
return -err;
}
err = nfp_cpp_readq(cpp, nsp_cpp, nsp_command, &reg);
if (err < 0)
return err;
return FIELD_GET(NSP_COMMAND_OPTION, reg);
return ret_val;
}
static int nfp_nsp_command_buf(struct nfp_nsp *nsp, u16 code, u32 option,