nfp: bpf: remove the register renumbering leftovers

The register renumbering was removed and will not be coming back
in its old, naive form, given that it would be fundamentally
incompatible with calling functions.  Remove the leftovers.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/bpf/jit.c

@@ -2314,9 +2314,6 @@ nfp_bpf_jit(struct bpf_prog *filter, void *prog_mem,
 	if (ret)
 		goto out;
 
-	nfp_prog->num_regs = MAX_BPF_REG;
-	nfp_prog->regs_per_thread = 32;
-
 	nfp_prog->prog = prog_mem;
 	nfp_prog->__prog_alloc_len = prog_sz;
 
@@ -2331,7 +2328,6 @@ nfp_bpf_jit(struct bpf_prog *filter, void *prog_mem,
 	ret = nfp_bpf_ustore_calc(nfp_prog, (__force __le64 *)prog_mem);
 
 	res->n_instr = nfp_prog->prog_len;
-	res->dense_mode = false;
 out:
 	nfp_prog_free(nfp_prog);
 

drivers/net/ethernet/netronome/nfp/bpf/main.h

@@ -141,8 +141,6 @@ static inline u8 mbpf_mode(const struct nfp_insn_meta *meta)
  * @prog_len: number of valid instructions in @prog array
  * @__prog_alloc_len: alloc size of @prog array
  * @type: BPF program type
- * @num_regs: number of registers used by this program
- * @regs_per_thread: number of basic registers allocated per thread
  * @start_off: address of the first instruction in the memory
  * @tgt_out: jump target for normal exit
  * @tgt_abort: jump target for abort (e.g. access outside of packet buffer)
@@ -159,9 +157,6 @@ struct nfp_prog {
 
 	enum bpf_prog_type type;
 
-	unsigned int num_regs;
-	unsigned int regs_per_thread;
-
 	unsigned int start_off;
 	unsigned int tgt_out;
 	unsigned int tgt_abort;
@@ -177,7 +172,6 @@ struct nfp_prog {
 
 struct nfp_bpf_result {
 	unsigned int n_instr;
-	bool dense_mode;
 };
 
 int

drivers/net/ethernet/netronome/nfp/bpf/offload.c

@@ -98,19 +98,14 @@ nfp_net_bpf_offload_prepare(struct nfp_net *nn,
 static void
 nfp_net_bpf_load_and_start(struct nfp_net *nn, u32 tc_flags,
 			   void *code, dma_addr_t dma_addr,
-			   unsigned int code_sz, unsigned int n_instr,
-			   bool dense_mode)
+			   unsigned int code_sz, unsigned int n_instr)
 {
-	u64 bpf_addr = dma_addr;
 	int err;
 
 	nn->dp.bpf_offload_skip_sw = !!(tc_flags & TCA_CLS_FLAGS_SKIP_SW);
 
-	if (dense_mode)
-		bpf_addr |= NFP_NET_CFG_BPF_CFG_8CTX;
-
 	nn_writew(nn, NFP_NET_CFG_BPF_SIZE, n_instr);
-	nn_writeq(nn, NFP_NET_CFG_BPF_ADDR, bpf_addr);
+	nn_writeq(nn, NFP_NET_CFG_BPF_ADDR, dma_addr);
 
 	/* Load up the JITed code */
 	err = nfp_net_reconfig(nn, NFP_NET_CFG_UPDATE_BPF);
@@ -169,7 +164,7 @@ int nfp_net_bpf_offload(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf)
 		nfp_net_bpf_stop(nn);
 		nfp_net_bpf_load_and_start(nn, cls_bpf->gen_flags, code,
 					   dma_addr, max_instr * sizeof(u64),
-					   res.n_instr, res.dense_mode);
+					   res.n_instr);
 		return 0;
 
 	case TC_CLSBPF_ADD:
@@ -183,7 +178,7 @@ int nfp_net_bpf_offload(struct nfp_net *nn, struct tc_cls_bpf_offload *cls_bpf)
 
 		nfp_net_bpf_load_and_start(nn, cls_bpf->gen_flags, code,
 					   dma_addr, max_instr * sizeof(u64),
-					   res.n_instr, res.dense_mode);
+					   res.n_instr);
 		return 0;
 
 	case TC_CLSBPF_DESTROY: