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/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2018 Netronome Systems, Inc.
* All rights reserved.
*/
#include "nfp_cpp.h"
#include "nfp_nffw.h"
#include "nfp_mip.h"
#include "nfp6000/nfp6000.h"
#include "nfp_resource.h"
/*
* flg_info_version = flags[0]<27:16>
* This is a small version counter intended only to detect if the current
* implementation can read the current struct. Struct changes should be very
* rare and as such a 12-bit counter should cover large spans of time. By the
* time it wraps around, we don't expect to have 4096 versions of this struct
* to be in use at the same time.
*/
static uint32_t
nffw_res_info_version_get(const struct nfp_nffw_info_data *res)
{
return (res->flags[0] >> 16) & 0xfff;
}
/* flg_init = flags[0]<0> */
static uint32_t
nffw_res_flg_init_get(const struct nfp_nffw_info_data *res)
{
return (res->flags[0] >> 0) & 1;
}
/* loaded = loaded__mu_da__mip_off_hi<31:31> */
static uint32_t
nffw_fwinfo_loaded_get(const struct nffw_fwinfo *fi)
{
return (fi->loaded__mu_da__mip_off_hi >> 31) & 1;
}
/* mip_cppid = mip_cppid */
static uint32_t
nffw_fwinfo_mip_cppid_get(const struct nffw_fwinfo *fi)
{
return fi->mip_cppid;
}
/* loaded = loaded__mu_da__mip_off_hi<8:8> */
static uint32_t
nffw_fwinfo_mip_mu_da_get(const struct nffw_fwinfo *fi)
{
return (fi->loaded__mu_da__mip_off_hi >> 8) & 1;
}
/* mip_offset = (loaded__mu_da__mip_off_hi<7:0> << 8) | mip_offset_lo */
static uint64_t
nffw_fwinfo_mip_offset_get(const struct nffw_fwinfo *fi)
{
uint64_t mip_off_hi = fi->loaded__mu_da__mip_off_hi;
return (mip_off_hi & 0xFF) << 32 | fi->mip_offset_lo;
}
#define NFP_IMB_TGTADDRESSMODECFG_MODE_of(_x) (((_x) >> 13) & 0x7)
#define NFP_IMB_TGTADDRESSMODECFG_ADDRMODE BIT(12)
#define NFP_IMB_TGTADDRESSMODECFG_ADDRMODE_32_BIT 0
#define NFP_IMB_TGTADDRESSMODECFG_ADDRMODE_40_BIT BIT(12)
static int
nfp_mip_mu_locality_lsb(struct nfp_cpp *cpp)
{
unsigned int mode, addr40;
uint32_t xpbaddr, imbcppat;
int err;
/* Hardcoded XPB IMB Base, island 0 */
xpbaddr = 0x000a0000 + NFP_CPP_TARGET_MU * 4;
err = nfp_xpb_readl(cpp, xpbaddr, &imbcppat);
if (err < 0)
return err;
mode = NFP_IMB_TGTADDRESSMODECFG_MODE_of(imbcppat);
addr40 = !!(imbcppat & NFP_IMB_TGTADDRESSMODECFG_ADDRMODE);
return nfp_cppat_mu_locality_lsb(mode, addr40);
}
static unsigned int
nffw_res_fwinfos(struct nfp_nffw_info_data *fwinf, struct nffw_fwinfo **arr)
{
/*
* For the this code, version 0 is most likely to be version 1 in this
* case. Since the kernel driver does not take responsibility for
* initialising the nfp.nffw resource, any previous code (CA firmware or
* userspace) that left the version 0 and did set the init flag is going
* to be version 1.
*/
switch (nffw_res_info_version_get(fwinf)) {
case 0:
case 1:
*arr = &fwinf->info.v1.fwinfo[0];
return NFFW_FWINFO_CNT_V1;
case 2:
*arr = &fwinf->info.v2.fwinfo[0];
return NFFW_FWINFO_CNT_V2;
default:
*arr = NULL;
return 0;
}
}
/*
* nfp_nffw_info_open() - Acquire the lock on the NFFW table
* @cpp: NFP CPP handle
*
* Return: 0, or -ERRNO
*/
struct nfp_nffw_info *
nfp_nffw_info_open(struct nfp_cpp *cpp)
{
struct nfp_nffw_info_data *fwinf;
struct nfp_nffw_info *state;
uint32_t info_ver;
int err;
state = malloc(sizeof(*state));
if (!state)
return NULL;
memset(state, 0, sizeof(*state));
state->res = nfp_resource_acquire(cpp, NFP_RESOURCE_NFP_NFFW);
if (!state->res)
goto err_free;
fwinf = &state->fwinf;
if (sizeof(*fwinf) > nfp_resource_size(state->res))
goto err_release;
err = nfp_cpp_read(cpp, nfp_resource_cpp_id(state->res),
nfp_resource_address(state->res),
fwinf, sizeof(*fwinf));
if (err < (int)sizeof(*fwinf))
goto err_release;
if (!nffw_res_flg_init_get(fwinf))
goto err_release;
info_ver = nffw_res_info_version_get(fwinf);
if (info_ver > NFFW_INFO_VERSION_CURRENT)
goto err_release;
state->cpp = cpp;
return state;
err_release:
nfp_resource_release(state->res);
err_free:
free(state);
return NULL;
}
/*
* nfp_nffw_info_release() - Release the lock on the NFFW table
* @state: NFP FW info state
*
* Return: 0, or -ERRNO
*/
void
nfp_nffw_info_close(struct nfp_nffw_info *state)
{
nfp_resource_release(state->res);
free(state);
}
/*
* nfp_nffw_info_fwid_first() - Return the first firmware ID in the NFFW
* @state: NFP FW info state
*
* Return: First NFFW firmware info, NULL on failure
*/
static struct nffw_fwinfo *
nfp_nffw_info_fwid_first(struct nfp_nffw_info *state)
{
struct nffw_fwinfo *fwinfo;
unsigned int cnt, i;
cnt = nffw_res_fwinfos(&state->fwinf, &fwinfo);
if (!cnt)
return NULL;
for (i = 0; i < cnt; i++)
if (nffw_fwinfo_loaded_get(&fwinfo[i]))
return &fwinfo[i];
return NULL;
}
/*
* nfp_nffw_info_mip_first() - Retrieve the location of the first FW's MIP
* @state: NFP FW info state
* @cpp_id: Pointer to the CPP ID of the MIP
* @off: Pointer to the CPP Address of the MIP
*
* Return: 0, or -ERRNO
*/
int
nfp_nffw_info_mip_first(struct nfp_nffw_info *state, uint32_t *cpp_id,
uint64_t *off)
{
struct nffw_fwinfo *fwinfo;
fwinfo = nfp_nffw_info_fwid_first(state);
if (!fwinfo)
return -EINVAL;
*cpp_id = nffw_fwinfo_mip_cppid_get(fwinfo);
*off = nffw_fwinfo_mip_offset_get(fwinfo);
if (nffw_fwinfo_mip_mu_da_get(fwinfo)) {
int locality_off;
if (NFP_CPP_ID_TARGET_of(*cpp_id) != NFP_CPP_TARGET_MU)
return 0;
locality_off = nfp_mip_mu_locality_lsb(state->cpp);
if (locality_off < 0)
return locality_off;
*off &= ~(NFP_MU_ADDR_ACCESS_TYPE_MASK << locality_off);
*off |= NFP_MU_ADDR_ACCESS_TYPE_DIRECT << locality_off;
}
return 0;
}
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