diff options
Diffstat (limited to 'drivers/net/ethernet/netronome/nfp/bpf/main.c')
-rw-r--r-- | drivers/net/ethernet/netronome/nfp/bpf/main.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/drivers/net/ethernet/netronome/nfp/bpf/main.c b/drivers/net/ethernet/netronome/nfp/bpf/main.c index 54bfd7846f6d..4f6553f01178 100644 --- a/drivers/net/ethernet/netronome/nfp/bpf/main.c +++ b/drivers/net/ethernet/netronome/nfp/bpf/main.c @@ -34,10 +34,12 @@ #include <net/pkt_cls.h> #include "../nfpcore/nfp_cpp.h" +#include "../nfpcore/nfp_nffw.h" #include "../nfp_app.h" #include "../nfp_main.h" #include "../nfp_net.h" #include "../nfp_port.h" +#include "fw.h" #include "main.h" static bool nfp_net_ebpf_capable(struct nfp_net *nn) @@ -155,10 +157,123 @@ static bool nfp_bpf_tc_busy(struct nfp_app *app, struct nfp_net *nn) return nn->dp.ctrl & NFP_NET_CFG_CTRL_BPF; } +static int +nfp_bpf_parse_cap_adjust_head(struct nfp_app_bpf *bpf, void __iomem *value, + u32 length) +{ + struct nfp_bpf_cap_tlv_adjust_head __iomem *cap = value; + struct nfp_cpp *cpp = bpf->app->pf->cpp; + + if (length < sizeof(*cap)) { + nfp_err(cpp, "truncated adjust_head TLV: %d\n", length); + return -EINVAL; + } + + bpf->adjust_head.flags = readl(&cap->flags); + bpf->adjust_head.off_min = readl(&cap->off_min); + bpf->adjust_head.off_max = readl(&cap->off_max); + bpf->adjust_head.guaranteed_sub = readl(&cap->guaranteed_sub); + bpf->adjust_head.guaranteed_add = readl(&cap->guaranteed_add); + + if (bpf->adjust_head.off_min > bpf->adjust_head.off_max) { + nfp_err(cpp, "invalid adjust_head TLV: min > max\n"); + return -EINVAL; + } + if (!FIELD_FIT(UR_REG_IMM_MAX, bpf->adjust_head.off_min) || + !FIELD_FIT(UR_REG_IMM_MAX, bpf->adjust_head.off_max)) { + nfp_warn(cpp, "disabling adjust_head - driver expects min/max to fit in as immediates\n"); + memset(&bpf->adjust_head, 0, sizeof(bpf->adjust_head)); + return 0; + } + + return 0; +} + +static int nfp_bpf_parse_capabilities(struct nfp_app *app) +{ + struct nfp_cpp *cpp = app->pf->cpp; + struct nfp_cpp_area *area; + u8 __iomem *mem, *start; + + mem = nfp_rtsym_map(app->pf->rtbl, "_abi_bpf_capabilities", "bpf.cap", + 8, &area); + if (IS_ERR(mem)) + return PTR_ERR(mem) == -ENOENT ? 0 : PTR_ERR(mem); + + start = mem; + while (mem - start + 8 < nfp_cpp_area_size(area)) { + u8 __iomem *value; + u32 type, length; + + type = readl(mem); + length = readl(mem + 4); + value = mem + 8; + + mem += 8 + length; + if (mem - start > nfp_cpp_area_size(area)) + goto err_release_free; + + switch (type) { + case NFP_BPF_CAP_TYPE_ADJUST_HEAD: + if (nfp_bpf_parse_cap_adjust_head(app->priv, value, + length)) + goto err_release_free; + break; + default: + nfp_dbg(cpp, "unknown BPF capability: %d\n", type); + break; + } + } + if (mem - start != nfp_cpp_area_size(area)) { + nfp_err(cpp, "BPF capabilities left after parsing, parsed:%zd total length:%zu\n", + mem - start, nfp_cpp_area_size(area)); + goto err_release_free; + } + + nfp_cpp_area_release_free(area); + + return 0; + +err_release_free: + nfp_err(cpp, "invalid BPF capabilities at offset:%zd\n", mem - start); + nfp_cpp_area_release_free(area); + return -EINVAL; +} + +static int nfp_bpf_init(struct nfp_app *app) +{ + struct nfp_app_bpf *bpf; + int err; + + bpf = kzalloc(sizeof(*bpf), GFP_KERNEL); + if (!bpf) + return -ENOMEM; + bpf->app = app; + app->priv = bpf; + + err = nfp_bpf_parse_capabilities(app); + if (err) + goto err_free_bpf; + + return 0; + +err_free_bpf: + kfree(bpf); + return err; +} + +static void nfp_bpf_clean(struct nfp_app *app) +{ + kfree(app->priv); +} + const struct nfp_app_type app_bpf = { .id = NFP_APP_BPF_NIC, .name = "ebpf", + .init = nfp_bpf_init, + .clean = nfp_bpf_clean, + .extra_cap = nfp_bpf_extra_cap, .vnic_alloc = nfp_app_nic_vnic_alloc, |