Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * Copyright Gavin Shan, IBM Corporation 2016.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/etherdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/netdevice.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/skbuff.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <net/ncsi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <net/net_namespace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <net/sock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <net/genetlink.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include "internal.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #include "ncsi-pkt.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) static const int padding_bytes = 26;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) u32 ncsi_calculate_checksum(unsigned char *data, int len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	u32 checksum = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 	for (i = 0; i < len; i += 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 		checksum += (((u32)data[i] << 8) | data[i + 1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 	checksum = (~checksum + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 	return checksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) /* This function should be called after the data area has been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36)  * populated completely.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) static void ncsi_cmd_build_header(struct ncsi_pkt_hdr *h,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 				  struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	u32 checksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	__be32 *pchecksum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	h->mc_id        = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 	h->revision     = NCSI_PKT_REVISION;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	h->reserved     = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 	h->id           = nca->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	h->type         = nca->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	h->channel      = NCSI_TO_CHANNEL(nca->package,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 					  nca->channel);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 	h->length       = htons(nca->payload);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 	h->reserved1[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	h->reserved1[1] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	/* Fill with calculated checksum */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	checksum = ncsi_calculate_checksum((unsigned char *)h,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 					   sizeof(*h) + nca->payload);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	pchecksum = (__be32 *)((void *)h + sizeof(struct ncsi_pkt_hdr) +
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 		    ALIGN(nca->payload, 4));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	*pchecksum = htonl(checksum);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) static int ncsi_cmd_handler_default(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 				    struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct ncsi_cmd_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static int ncsi_cmd_handler_sp(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 			       struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	struct ncsi_cmd_sp_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	cmd->hw_arbitration = nca->bytes[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static int ncsi_cmd_handler_dc(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 			       struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	struct ncsi_cmd_dc_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	cmd->ald = nca->bytes[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) static int ncsi_cmd_handler_rc(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 			       struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	struct ncsi_cmd_rc_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int ncsi_cmd_handler_ae(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 			       struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	struct ncsi_cmd_ae_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 	cmd->mc_id = nca->bytes[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	cmd->mode = htonl(nca->dwords[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) static int ncsi_cmd_handler_sl(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 			       struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	struct ncsi_cmd_sl_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	cmd->mode = htonl(nca->dwords[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	cmd->oem_mode = htonl(nca->dwords[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int ncsi_cmd_handler_svf(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 				struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	struct ncsi_cmd_svf_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	cmd->vlan = htons(nca->words[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	cmd->index = nca->bytes[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	cmd->enable = nca->bytes[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) static int ncsi_cmd_handler_ev(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 			       struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	struct ncsi_cmd_ev_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 	cmd->mode = nca->bytes[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) static int ncsi_cmd_handler_sma(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 				struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	struct ncsi_cmd_sma_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	for (i = 0; i < 6; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		cmd->mac[i] = nca->bytes[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 	cmd->index = nca->bytes[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	cmd->at_e = nca->bytes[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) static int ncsi_cmd_handler_ebf(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 				struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	struct ncsi_cmd_ebf_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	cmd->mode = htonl(nca->dwords[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) static int ncsi_cmd_handler_egmf(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 				 struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	struct ncsi_cmd_egmf_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	cmd->mode = htonl(nca->dwords[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static int ncsi_cmd_handler_snfc(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 				 struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 	struct ncsi_cmd_snfc_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	cmd = skb_put_zero(skb, sizeof(*cmd));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 	cmd->mode = nca->bytes[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) static int ncsi_cmd_handler_oem(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 				struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	struct ncsi_cmd_oem_pkt *cmd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	unsigned int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	int payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	/* NC-SI spec DSP_0222_1.2.0, section 8.2.2.2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	 * requires payload to be padded with 0 to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	 * 32-bit boundary before the checksum field.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	 * Ensure the padding bytes are accounted for in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	 * skb allocation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	payload = ALIGN(nca->payload, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	len = sizeof(struct ncsi_cmd_pkt_hdr) + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	len += max(payload, padding_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	cmd = skb_put_zero(skb, len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	memcpy(&cmd->mfr_id, nca->data, nca->payload);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	ncsi_cmd_build_header(&cmd->cmd.common, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static struct ncsi_cmd_handler {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 	unsigned char type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	int           payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	int           (*handler)(struct sk_buff *skb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 				 struct ncsi_cmd_arg *nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) } ncsi_cmd_handlers[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	{ NCSI_PKT_CMD_CIS,    0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	{ NCSI_PKT_CMD_SP,     4, ncsi_cmd_handler_sp      },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 	{ NCSI_PKT_CMD_DP,     0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	{ NCSI_PKT_CMD_EC,     0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	{ NCSI_PKT_CMD_DC,     4, ncsi_cmd_handler_dc      },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	{ NCSI_PKT_CMD_RC,     4, ncsi_cmd_handler_rc      },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	{ NCSI_PKT_CMD_ECNT,   0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	{ NCSI_PKT_CMD_DCNT,   0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	{ NCSI_PKT_CMD_AE,     8, ncsi_cmd_handler_ae      },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	{ NCSI_PKT_CMD_SL,     8, ncsi_cmd_handler_sl      },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	{ NCSI_PKT_CMD_GLS,    0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	{ NCSI_PKT_CMD_SVF,    8, ncsi_cmd_handler_svf     },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	{ NCSI_PKT_CMD_EV,     4, ncsi_cmd_handler_ev      },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	{ NCSI_PKT_CMD_DV,     0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	{ NCSI_PKT_CMD_SMA,    8, ncsi_cmd_handler_sma     },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	{ NCSI_PKT_CMD_EBF,    4, ncsi_cmd_handler_ebf     },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	{ NCSI_PKT_CMD_DBF,    0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 	{ NCSI_PKT_CMD_EGMF,   4, ncsi_cmd_handler_egmf    },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	{ NCSI_PKT_CMD_DGMF,   0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	{ NCSI_PKT_CMD_SNFC,   4, ncsi_cmd_handler_snfc    },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 	{ NCSI_PKT_CMD_GVI,    0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 	{ NCSI_PKT_CMD_GC,     0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	{ NCSI_PKT_CMD_GP,     0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 	{ NCSI_PKT_CMD_GCPS,   0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	{ NCSI_PKT_CMD_GNS,    0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	{ NCSI_PKT_CMD_GNPTS,  0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	{ NCSI_PKT_CMD_GPS,    0, ncsi_cmd_handler_default },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	{ NCSI_PKT_CMD_OEM,   -1, ncsi_cmd_handler_oem     },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	{ NCSI_PKT_CMD_PLDM,   0, NULL                     },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	{ NCSI_PKT_CMD_GPUUID, 0, ncsi_cmd_handler_default }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static struct ncsi_request *ncsi_alloc_command(struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	struct ncsi_dev_priv *ndp = nca->ndp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	struct ncsi_dev *nd = &ndp->ndev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	struct net_device *dev = nd->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	int hlen = LL_RESERVED_SPACE(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	int tlen = dev->needed_tailroom;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	int payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 	int len = hlen + tlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	struct sk_buff *skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	struct ncsi_request *nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	nr = ncsi_alloc_request(ndp, nca->req_flags);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	if (!nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	/* NCSI command packet has 16-bytes header, payload, 4 bytes checksum.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	 * Payload needs padding so that the checksum field following payload is
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	 * aligned to 32-bit boundary.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	 * The packet needs padding if its payload is less than 26 bytes to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 	 * meet 64 bytes minimal ethernet frame length.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	len += sizeof(struct ncsi_cmd_pkt_hdr) + 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 	payload = ALIGN(nca->payload, 4);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	len += max(payload, padding_bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	/* Allocate skb */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	skb = alloc_skb(len, GFP_ATOMIC);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	if (!skb) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 		ncsi_free_request(nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 		return NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	nr->cmd = skb;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 	skb_reserve(skb, hlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	skb_reset_network_header(skb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	skb->dev = dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	skb->protocol = htons(ETH_P_NCSI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	return nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) int ncsi_xmit_cmd(struct ncsi_cmd_arg *nca)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	struct ncsi_cmd_handler *nch = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	struct ncsi_request *nr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 	unsigned char type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	struct ethhdr *eh;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	int i, ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 	/* Use OEM generic handler for Netlink request */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	if (nca->req_flags == NCSI_REQ_FLAG_NETLINK_DRIVEN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 		type = NCSI_PKT_CMD_OEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		type = nca->type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	/* Search for the handler */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	for (i = 0; i < ARRAY_SIZE(ncsi_cmd_handlers); i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 		if (ncsi_cmd_handlers[i].type == type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 			if (ncsi_cmd_handlers[i].handler)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 				nch = &ncsi_cmd_handlers[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 			else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 				nch = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	if (!nch) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 		netdev_err(nca->ndp->ndev.dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 			   "Cannot send packet with type 0x%02x\n", nca->type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		return -ENOENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	/* Get packet payload length and allocate the request
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 	 * It is expected that if length set as negative in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	 * handler structure means caller is initializing it
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	 * and setting length in nca before calling xmit function
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 	if (nch->payload >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 		nca->payload = nch->payload;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 	nr = ncsi_alloc_command(nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	if (!nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	/* track netlink information */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 	if (nca->req_flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 		nr->snd_seq = nca->info->snd_seq;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 		nr->snd_portid = nca->info->snd_portid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 		nr->nlhdr = *nca->info->nlhdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 	/* Prepare the packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	nca->id = nr->id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	ret = nch->handler(nr->cmd, nca);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		ncsi_free_request(nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	/* Fill the ethernet header */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 	eh = skb_push(nr->cmd, sizeof(*eh));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 	eh->h_proto = htons(ETH_P_NCSI);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	eth_broadcast_addr(eh->h_dest);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	/* If mac address received from device then use it for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	 * source address as unicast address else use broadcast
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	 * address as source address
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	if (nca->ndp->gma_flag == 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 		memcpy(eh->h_source, nca->ndp->ndev.dev->dev_addr, ETH_ALEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 	else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 		eth_broadcast_addr(eh->h_source);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 	/* Start the timer for the request that might not have
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 	 * corresponding response. Given NCSI is an internal
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	 * connection a 1 second delay should be sufficient.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	nr->enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	mod_timer(&nr->timer, jiffies + 1 * HZ);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	/* Send NCSI packet */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	skb_get(nr->cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 	ret = dev_queue_xmit(nr->cmd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 		ncsi_free_request(nr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) }