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nfp: bpf: parse global BPF ABI version capability

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Up until now we only had per-vNIC BPF ABI version capabilities,
which are slightly awkward to use because bulk of the resources
and configuration does not relate to any particular vNIC.  Add
a new capability for global ABI version and check the per-vNIC
version are equal to it.  Assume the ABI version 2 if no explicit
version capability is present.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2018-10-01 18:30:32 -07:00 committed by Daniel Borkmann
parent cb86d0f878
commit 28264eb227
3 changed files with 44 additions and 4 deletions
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1
drivers/net/ethernet/netronome/nfp/bpf/fw.h
View File

@ -52,6 +52,7 @@ enum bpf_cap_tlv_type {
NFP_BPF_CAP_TYPE_RANDOM = 4,
NFP_BPF_CAP_TYPE_QUEUE_SELECT = 5,
NFP_BPF_CAP_TYPE_ADJUST_TAIL = 6,
NFP_BPF_CAP_TYPE_ABI_VERSION = 7,
};
struct nfp_bpf_cap_tlv_func {

43
drivers/net/ethernet/netronome/nfp/bpf/main.c
View File

@ -54,11 +54,14 @@ const struct rhashtable_params nfp_bpf_maps_neutral_params = {
static bool nfp_net_ebpf_capable(struct nfp_net *nn)
{
#ifdef __LITTLE_ENDIAN
if (nn->cap & NFP_NET_CFG_CTRL_BPF &&
nn_readb(nn, NFP_NET_CFG_BPF_ABI) == NFP_NET_BPF_ABI)
return true;
#endif
struct nfp_app_bpf *bpf = nn->app->priv;
return nn->cap & NFP_NET_CFG_CTRL_BPF &&
bpf->abi_version &&
nn_readb(nn, NFP_NET_CFG_BPF_ABI) == bpf->abi_version;
#else
return false;
#endif
}
static int
@ -342,6 +345,26 @@ nfp_bpf_parse_cap_adjust_tail(struct nfp_app_bpf *bpf, void __iomem *value,
return 0;
}
static int
nfp_bpf_parse_cap_abi_version(struct nfp_app_bpf *bpf, void __iomem *value,
u32 length)
{
if (length < 4) {
nfp_err(bpf->app->cpp, "truncated ABI version TLV: %d\n",
length);
return -EINVAL;
}
bpf->abi_version = readl(value);
if (bpf->abi_version != 2) {
nfp_warn(bpf->app->cpp, "unsupported BPF ABI version: %d\n",
bpf->abi_version);
bpf->abi_version = 0;
}
return 0;
}
static int nfp_bpf_parse_capabilities(struct nfp_app *app)
{
struct nfp_cpp *cpp = app->pf->cpp;
@ -393,6 +416,11 @@ static int nfp_bpf_parse_capabilities(struct nfp_app *app)
length))
goto err_release_free;
break;
case NFP_BPF_CAP_TYPE_ABI_VERSION:
if (nfp_bpf_parse_cap_abi_version(app->priv, value,
length))
goto err_release_free;
break;
default:
nfp_dbg(cpp, "unknown BPF capability: %d\n", type);
break;
@ -414,6 +442,11 @@ err_release_free:
return -EINVAL;
}
static void nfp_bpf_init_capabilities(struct nfp_app_bpf *bpf)
{
bpf->abi_version = 2; /* Original BPF ABI version */
}
static int nfp_bpf_ndo_init(struct nfp_app *app, struct net_device *netdev)
{
struct nfp_app_bpf *bpf = app->priv;
@ -447,6 +480,8 @@ static int nfp_bpf_init(struct nfp_app *app)
if (err)
goto err_free_bpf;
nfp_bpf_init_capabilities(bpf);
err = nfp_bpf_parse_capabilities(app);
if (err)
goto err_free_neutral_maps;

4
drivers/net/ethernet/netronome/nfp/bpf/main.h
View File

@ -127,6 +127,8 @@ enum pkt_vec {
*
* @maps_neutral: hash table of offload-neutral maps (on pointer)
*
* @abi_version: global BPF ABI version
*
* @adjust_head: adjust head capability
* @adjust_head.flags: extra flags for adjust head
* @adjust_head.off_min: minimal packet offset within buffer required
@ -170,6 +172,8 @@ struct nfp_app_bpf {
struct rhashtable maps_neutral;
u32 abi_version;
struct nfp_bpf_cap_adjust_head {
u32 flags;
int off_min;