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path: root/drivers/net/gianfar_ethtool.c
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-rw-r--r--drivers/net/gianfar_ethtool.c930
1 files changed, 929 insertions, 1 deletions
diff --git a/drivers/net/gianfar_ethtool.c b/drivers/net/gianfar_ethtool.c
index 92d7ac09c87a..05103362bebe 100644
--- a/drivers/net/gianfar_ethtool.c
+++ b/drivers/net/gianfar_ethtool.c
@@ -39,6 +39,7 @@
39#include <linux/ethtool.h> 39#include <linux/ethtool.h>
40#include <linux/mii.h> 40#include <linux/mii.h>
41#include <linux/phy.h> 41#include <linux/phy.h>
42#include <linux/sort.h>
42 43
43#include "gianfar.h" 44#include "gianfar.h"
44 45
@@ -770,19 +771,945 @@ static int gfar_set_hash_opts(struct gfar_private *priv, struct ethtool_rxnfc *c
770 return 0; 771 return 0;
771} 772}
772 773
774static int gfar_check_filer_hardware(struct gfar_private *priv)
775{
776 struct gfar __iomem *regs = NULL;
777 u32 i;
778
779 regs = priv->gfargrp[0].regs;
780
781 /* Check if we are in FIFO mode */
782 i = gfar_read(&regs->ecntrl);
783 i &= ECNTRL_FIFM;
784 if (i == ECNTRL_FIFM) {
785 netdev_notice(priv->ndev, "Interface in FIFO mode\n");
786 i = gfar_read(&regs->rctrl);
787 i &= RCTRL_PRSDEP_MASK | RCTRL_PRSFM;
788 if (i == (RCTRL_PRSDEP_MASK | RCTRL_PRSFM)) {
789 netdev_info(priv->ndev,
790 "Receive Queue Filtering enabled\n");
791 } else {
792 netdev_warn(priv->ndev,
793 "Receive Queue Filtering disabled\n");
794 return -EOPNOTSUPP;
795 }
796 }
797 /* Or in standard mode */
798 else {
799 i = gfar_read(&regs->rctrl);
800 i &= RCTRL_PRSDEP_MASK;
801 if (i == RCTRL_PRSDEP_MASK) {
802 netdev_info(priv->ndev,
803 "Receive Queue Filtering enabled\n");
804 } else {
805 netdev_warn(priv->ndev,
806 "Receive Queue Filtering disabled\n");
807 return -EOPNOTSUPP;
808 }
809 }
810
811 /* Sets the properties for arbitrary filer rule
812 * to the first 4 Layer 4 Bytes */
813 regs->rbifx = 0xC0C1C2C3;
814 return 0;
815}
816
817static int gfar_comp_asc(const void *a, const void *b)
818{
819 return memcmp(a, b, 4);
820}
821
822static int gfar_comp_desc(const void *a, const void *b)
823{
824 return -memcmp(a, b, 4);
825}
826
827static void gfar_swap(void *a, void *b, int size)
828{
829 u32 *_a = a;
830 u32 *_b = b;
831
832 swap(_a[0], _b[0]);
833 swap(_a[1], _b[1]);
834 swap(_a[2], _b[2]);
835 swap(_a[3], _b[3]);
836}
837
838/* Write a mask to filer cache */
839static void gfar_set_mask(u32 mask, struct filer_table *tab)
840{
841 tab->fe[tab->index].ctrl = RQFCR_AND | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
842 tab->fe[tab->index].prop = mask;
843 tab->index++;
844}
845
846/* Sets parse bits (e.g. IP or TCP) */
847static void gfar_set_parse_bits(u32 value, u32 mask, struct filer_table *tab)
848{
849 gfar_set_mask(mask, tab);
850 tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_PID_PARSE
851 | RQFCR_AND;
852 tab->fe[tab->index].prop = value;
853 tab->index++;
854}
855
856static void gfar_set_general_attribute(u32 value, u32 mask, u32 flag,
857 struct filer_table *tab)
858{
859 gfar_set_mask(mask, tab);
860 tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_AND | flag;
861 tab->fe[tab->index].prop = value;
862 tab->index++;
863}
864
865/*
866 * For setting a tuple of value and mask of type flag
867 * Example:
868 * IP-Src = 10.0.0.0/255.0.0.0
869 * value: 0x0A000000 mask: FF000000 flag: RQFPR_IPV4
870 *
871 * Ethtool gives us a value=0 and mask=~0 for don't care a tuple
872 * For a don't care mask it gives us a 0
873 *
874 * The check if don't care and the mask adjustment if mask=0 is done for VLAN
875 * and MAC stuff on an upper level (due to missing information on this level).
876 * For these guys we can discard them if they are value=0 and mask=0.
877 *
878 * Further the all masks are one-padded for better hardware efficiency.
879 */
880static void gfar_set_attribute(u32 value, u32 mask, u32 flag,
881 struct filer_table *tab)
882{
883 switch (flag) {
884 /* 3bit */
885 case RQFCR_PID_PRI:
886 if (!(value | mask))
887 return;
888 mask |= RQFCR_PID_PRI_MASK;
889 break;
890 /* 8bit */
891 case RQFCR_PID_L4P:
892 case RQFCR_PID_TOS:
893 if (!~(mask | RQFCR_PID_L4P_MASK))
894 return;
895 if (!mask)
896 mask = ~0;
897 else
898 mask |= RQFCR_PID_L4P_MASK;
899 break;
900 /* 12bit */
901 case RQFCR_PID_VID:
902 if (!(value | mask))
903 return;
904 mask |= RQFCR_PID_VID_MASK;
905 break;
906 /* 16bit */
907 case RQFCR_PID_DPT:
908 case RQFCR_PID_SPT:
909 case RQFCR_PID_ETY:
910 if (!~(mask | RQFCR_PID_PORT_MASK))
911 return;
912 if (!mask)
913 mask = ~0;
914 else
915 mask |= RQFCR_PID_PORT_MASK;
916 break;
917 /* 24bit */
918 case RQFCR_PID_DAH:
919 case RQFCR_PID_DAL:
920 case RQFCR_PID_SAH:
921 case RQFCR_PID_SAL:
922 if (!(value | mask))
923 return;
924 mask |= RQFCR_PID_MAC_MASK;
925 break;
926 /* for all real 32bit masks */
927 default:
928 if (!~mask)
929 return;
930 if (!mask)
931 mask = ~0;
932 break;
933 }
934 gfar_set_general_attribute(value, mask, flag, tab);
935}
936
937/* Translates value and mask for UDP, TCP or SCTP */
938static void gfar_set_basic_ip(struct ethtool_tcpip4_spec *value,
939 struct ethtool_tcpip4_spec *mask, struct filer_table *tab)
940{
941 gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
942 gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
943 gfar_set_attribute(value->pdst, mask->pdst, RQFCR_PID_DPT, tab);
944 gfar_set_attribute(value->psrc, mask->psrc, RQFCR_PID_SPT, tab);
945 gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
946}
947
948/* Translates value and mask for RAW-IP4 */
949static void gfar_set_user_ip(struct ethtool_usrip4_spec *value,
950 struct ethtool_usrip4_spec *mask, struct filer_table *tab)
951{
952 gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
953 gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
954 gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
955 gfar_set_attribute(value->proto, mask->proto, RQFCR_PID_L4P, tab);
956 gfar_set_attribute(value->l4_4_bytes, mask->l4_4_bytes, RQFCR_PID_ARB,
957 tab);
958
959}
960
961/* Translates value and mask for ETHER spec */
962static void gfar_set_ether(struct ethhdr *value, struct ethhdr *mask,
963 struct filer_table *tab)
964{
965 u32 upper_temp_mask = 0;
966 u32 lower_temp_mask = 0;
967 /* Source address */
968 if (!is_broadcast_ether_addr(mask->h_source)) {
969
970 if (is_zero_ether_addr(mask->h_source)) {
971 upper_temp_mask = 0xFFFFFFFF;
972 lower_temp_mask = 0xFFFFFFFF;
973 } else {
974 upper_temp_mask = mask->h_source[0] << 16
975 | mask->h_source[1] << 8
976 | mask->h_source[2];
977 lower_temp_mask = mask->h_source[3] << 16
978 | mask->h_source[4] << 8
979 | mask->h_source[5];
980 }
981 /* Upper 24bit */
982 gfar_set_attribute(
983 value->h_source[0] << 16 | value->h_source[1]
984 << 8 | value->h_source[2],
985 upper_temp_mask, RQFCR_PID_SAH, tab);
986 /* And the same for the lower part */
987 gfar_set_attribute(
988 value->h_source[3] << 16 | value->h_source[4]
989 << 8 | value->h_source[5],
990 lower_temp_mask, RQFCR_PID_SAL, tab);
991 }
992 /* Destination address */
993 if (!is_broadcast_ether_addr(mask->h_dest)) {
994
995 /* Special for destination is limited broadcast */
996 if ((is_broadcast_ether_addr(value->h_dest)
997 && is_zero_ether_addr(mask->h_dest))) {
998 gfar_set_parse_bits(RQFPR_EBC, RQFPR_EBC, tab);
999 } else {
1000
1001 if (is_zero_ether_addr(mask->h_dest)) {
1002 upper_temp_mask = 0xFFFFFFFF;
1003 lower_temp_mask = 0xFFFFFFFF;
1004 } else {
1005 upper_temp_mask = mask->h_dest[0] << 16
1006 | mask->h_dest[1] << 8
1007 | mask->h_dest[2];
1008 lower_temp_mask = mask->h_dest[3] << 16
1009 | mask->h_dest[4] << 8
1010 | mask->h_dest[5];
1011 }
1012
1013 /* Upper 24bit */
1014 gfar_set_attribute(
1015 value->h_dest[0] << 16
1016 | value->h_dest[1] << 8
1017 | value->h_dest[2],
1018 upper_temp_mask, RQFCR_PID_DAH, tab);
1019 /* And the same for the lower part */
1020 gfar_set_attribute(
1021 value->h_dest[3] << 16
1022 | value->h_dest[4] << 8
1023 | value->h_dest[5],
1024 lower_temp_mask, RQFCR_PID_DAL, tab);
1025 }
1026 }
1027
1028 gfar_set_attribute(value->h_proto, mask->h_proto, RQFCR_PID_ETY, tab);
1029
1030}
1031
1032/* Convert a rule to binary filter format of gianfar */
1033static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule,
1034 struct filer_table *tab)
1035{
1036 u32 vlan = 0, vlan_mask = 0;
1037 u32 id = 0, id_mask = 0;
1038 u32 cfi = 0, cfi_mask = 0;
1039 u32 prio = 0, prio_mask = 0;
1040
1041 u32 old_index = tab->index;
1042
1043 /* Check if vlan is wanted */
1044 if ((rule->flow_type & FLOW_EXT) && (rule->m_ext.vlan_tci != 0xFFFF)) {
1045 if (!rule->m_ext.vlan_tci)
1046 rule->m_ext.vlan_tci = 0xFFFF;
1047
1048 vlan = RQFPR_VLN;
1049 vlan_mask = RQFPR_VLN;
1050
1051 /* Separate the fields */
1052 id = rule->h_ext.vlan_tci & 0xFFF;
1053 id_mask = rule->m_ext.vlan_tci & 0xFFF;
1054 cfi = (rule->h_ext.vlan_tci >> 12) & 1;
1055 cfi_mask = (rule->m_ext.vlan_tci >> 12) & 1;
1056 prio = (rule->h_ext.vlan_tci >> 13) & 0x7;
1057 prio_mask = (rule->m_ext.vlan_tci >> 13) & 0x7;
1058
1059 if (cfi == 1 && cfi_mask == 1) {
1060 vlan |= RQFPR_CFI;
1061 vlan_mask |= RQFPR_CFI;
1062 } else if (cfi == 0 && cfi_mask == 1) {
1063 vlan_mask |= RQFPR_CFI;
1064 }
1065 }
1066
1067 switch (rule->flow_type & ~FLOW_EXT) {
1068 case TCP_V4_FLOW:
1069 gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_TCP | vlan,
1070 RQFPR_IPV4 | RQFPR_TCP | vlan_mask, tab);
1071 gfar_set_basic_ip(&rule->h_u.tcp_ip4_spec,
1072 &rule->m_u.tcp_ip4_spec, tab);
1073 break;
1074 case UDP_V4_FLOW:
1075 gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_UDP | vlan,
1076 RQFPR_IPV4 | RQFPR_UDP | vlan_mask, tab);
1077 gfar_set_basic_ip(&rule->h_u.udp_ip4_spec,
1078 &rule->m_u.udp_ip4_spec, tab);
1079 break;
1080 case SCTP_V4_FLOW:
1081 gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1082 tab);
1083 gfar_set_attribute(132, 0, RQFCR_PID_L4P, tab);
1084 gfar_set_basic_ip((struct ethtool_tcpip4_spec *) &rule->h_u,
1085 (struct ethtool_tcpip4_spec *) &rule->m_u, tab);
1086 break;
1087 case IP_USER_FLOW:
1088 gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
1089 tab);
1090 gfar_set_user_ip((struct ethtool_usrip4_spec *) &rule->h_u,
1091 (struct ethtool_usrip4_spec *) &rule->m_u, tab);
1092 break;
1093 case ETHER_FLOW:
1094 if (vlan)
1095 gfar_set_parse_bits(vlan, vlan_mask, tab);
1096 gfar_set_ether((struct ethhdr *) &rule->h_u,
1097 (struct ethhdr *) &rule->m_u, tab);
1098 break;
1099 default:
1100 return -1;
1101 }
1102
1103 /* Set the vlan attributes in the end */
1104 if (vlan) {
1105 gfar_set_attribute(id, id_mask, RQFCR_PID_VID, tab);
1106 gfar_set_attribute(prio, prio_mask, RQFCR_PID_PRI, tab);
1107 }
1108
1109 /* If there has been nothing written till now, it must be a default */
1110 if (tab->index == old_index) {
1111 gfar_set_mask(0xFFFFFFFF, tab);
1112 tab->fe[tab->index].ctrl = 0x20;
1113 tab->fe[tab->index].prop = 0x0;
1114 tab->index++;
1115 }
1116
1117 /* Remove last AND */
1118 tab->fe[tab->index - 1].ctrl &= (~RQFCR_AND);
1119
1120 /* Specify which queue to use or to drop */
1121 if (rule->ring_cookie == RX_CLS_FLOW_DISC)
1122 tab->fe[tab->index - 1].ctrl |= RQFCR_RJE;
1123 else
1124 tab->fe[tab->index - 1].ctrl |= (rule->ring_cookie << 10);
1125
1126 /* Only big enough entries can be clustered */
1127 if (tab->index > (old_index + 2)) {
1128 tab->fe[old_index + 1].ctrl |= RQFCR_CLE;
1129 tab->fe[tab->index - 1].ctrl |= RQFCR_CLE;
1130 }
1131
1132 /* In rare cases the cache can be full while there is free space in hw */
1133 if (tab->index > MAX_FILER_CACHE_IDX - 1)
1134 return -EBUSY;
1135
1136 return 0;
1137}
1138
1139/* Copy size filer entries */
1140static void gfar_copy_filer_entries(struct gfar_filer_entry dst[0],
1141 struct gfar_filer_entry src[0], s32 size)
1142{
1143 while (size > 0) {
1144 size--;
1145 dst[size].ctrl = src[size].ctrl;
1146 dst[size].prop = src[size].prop;
1147 }
1148}
1149
1150/* Delete the contents of the filer-table between start and end
1151 * and collapse them */
1152static int gfar_trim_filer_entries(u32 begin, u32 end, struct filer_table *tab)
1153{
1154 int length;
1155 if (end > MAX_FILER_CACHE_IDX || end < begin)
1156 return -EINVAL;
1157
1158 end++;
1159 length = end - begin;
1160
1161 /* Copy */
1162 while (end < tab->index) {
1163 tab->fe[begin].ctrl = tab->fe[end].ctrl;
1164 tab->fe[begin++].prop = tab->fe[end++].prop;
1165
1166 }
1167 /* Fill up with don't cares */
1168 while (begin < tab->index) {
1169 tab->fe[begin].ctrl = 0x60;
1170 tab->fe[begin].prop = 0xFFFFFFFF;
1171 begin++;
1172 }
1173
1174 tab->index -= length;
1175 return 0;
1176}
1177
1178/* Make space on the wanted location */
1179static int gfar_expand_filer_entries(u32 begin, u32 length,
1180 struct filer_table *tab)
1181{
1182 if (length == 0 || length + tab->index > MAX_FILER_CACHE_IDX || begin
1183 > MAX_FILER_CACHE_IDX)
1184 return -EINVAL;
1185
1186 gfar_copy_filer_entries(&(tab->fe[begin + length]), &(tab->fe[begin]),
1187 tab->index - length + 1);
1188
1189 tab->index += length;
1190 return 0;
1191}
1192
1193static int gfar_get_next_cluster_start(int start, struct filer_table *tab)
1194{
1195 for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) {
1196 if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE))
1197 == (RQFCR_AND | RQFCR_CLE))
1198 return start;
1199 }
1200 return -1;
1201}
1202
1203static int gfar_get_next_cluster_end(int start, struct filer_table *tab)
1204{
1205 for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) {
1206 if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE))
1207 == (RQFCR_CLE))
1208 return start;
1209 }
1210 return -1;
1211}
1212
1213/*
1214 * Uses hardwares clustering option to reduce
1215 * the number of filer table entries
1216 */
1217static void gfar_cluster_filer(struct filer_table *tab)
1218{
1219 s32 i = -1, j, iend, jend;
1220
1221 while ((i = gfar_get_next_cluster_start(++i, tab)) != -1) {
1222 j = i;
1223 while ((j = gfar_get_next_cluster_start(++j, tab)) != -1) {
1224 /*
1225 * The cluster entries self and the previous one
1226 * (a mask) must be identical!
1227 */
1228 if (tab->fe[i].ctrl != tab->fe[j].ctrl)
1229 break;
1230 if (tab->fe[i].prop != tab->fe[j].prop)
1231 break;
1232 if (tab->fe[i - 1].ctrl != tab->fe[j - 1].ctrl)
1233 break;
1234 if (tab->fe[i - 1].prop != tab->fe[j - 1].prop)
1235 break;
1236 iend = gfar_get_next_cluster_end(i, tab);
1237 jend = gfar_get_next_cluster_end(j, tab);
1238 if (jend == -1 || iend == -1)
1239 break;
1240 /*
1241 * First we make some free space, where our cluster
1242 * element should be. Then we copy it there and finally
1243 * delete in from its old location.
1244 */
1245
1246 if (gfar_expand_filer_entries(iend, (jend - j), tab)
1247 == -EINVAL)
1248 break;
1249
1250 gfar_copy_filer_entries(&(tab->fe[iend + 1]),
1251 &(tab->fe[jend + 1]), jend - j);
1252
1253 if (gfar_trim_filer_entries(jend - 1,
1254 jend + (jend - j), tab) == -EINVAL)
1255 return;
1256
1257 /* Mask out cluster bit */
1258 tab->fe[iend].ctrl &= ~(RQFCR_CLE);
1259 }
1260 }
1261}
1262
1263/* Swaps the 0xFF80 masked bits of a1<>a2 and b1<>b2 */
1264static void gfar_swap_ff80_bits(struct gfar_filer_entry *a1,
1265 struct gfar_filer_entry *a2, struct gfar_filer_entry *b1,
1266 struct gfar_filer_entry *b2)
1267{
1268 u32 temp[4];
1269 temp[0] = a1->ctrl & 0xFF80;
1270 temp[1] = a2->ctrl & 0xFF80;
1271 temp[2] = b1->ctrl & 0xFF80;
1272 temp[3] = b2->ctrl & 0xFF80;
1273
1274 a1->ctrl &= ~0xFF80;
1275 a2->ctrl &= ~0xFF80;
1276 b1->ctrl &= ~0xFF80;
1277 b2->ctrl &= ~0xFF80;
1278
1279 a1->ctrl |= temp[1];
1280 a2->ctrl |= temp[0];
1281 b1->ctrl |= temp[3];
1282 b2->ctrl |= temp[2];
1283}
1284
1285/*
1286 * Generate a list consisting of masks values with their start and
1287 * end of validity and block as indicator for parts belonging
1288 * together (glued by ANDs) in mask_table
1289 */
1290static u32 gfar_generate_mask_table(struct gfar_mask_entry *mask_table,
1291 struct filer_table *tab)
1292{
1293 u32 i, and_index = 0, block_index = 1;
1294
1295 for (i = 0; i < tab->index; i++) {
1296
1297 /* LSByte of control = 0 sets a mask */
1298 if (!(tab->fe[i].ctrl & 0xF)) {
1299 mask_table[and_index].mask = tab->fe[i].prop;
1300 mask_table[and_index].start = i;
1301 mask_table[and_index].block = block_index;
1302 if (and_index >= 1)
1303 mask_table[and_index - 1].end = i - 1;
1304 and_index++;
1305 }
1306 /* cluster starts will be separated because they should
1307 * hold their position */
1308 if (tab->fe[i].ctrl & RQFCR_CLE)
1309 block_index++;
1310 /* A not set AND indicates the end of a depended block */
1311 if (!(tab->fe[i].ctrl & RQFCR_AND))
1312 block_index++;
1313
1314 }
1315
1316 mask_table[and_index - 1].end = i - 1;
1317
1318 return and_index;
1319}
1320
1321/*
1322 * Sorts the entries of mask_table by the values of the masks.
1323 * Important: The 0xFF80 flags of the first and last entry of a
1324 * block must hold their position (which queue, CLusterEnable, ReJEct,
1325 * AND)
1326 */
1327static void gfar_sort_mask_table(struct gfar_mask_entry *mask_table,
1328 struct filer_table *temp_table, u32 and_index)
1329{
1330 /* Pointer to compare function (_asc or _desc) */
1331 int (*gfar_comp)(const void *, const void *);
1332
1333 u32 i, size = 0, start = 0, prev = 1;
1334 u32 old_first, old_last, new_first, new_last;
1335
1336 gfar_comp = &gfar_comp_desc;
1337
1338 for (i = 0; i < and_index; i++) {
1339
1340 if (prev != mask_table[i].block) {
1341 old_first = mask_table[start].start + 1;
1342 old_last = mask_table[i - 1].end;
1343 sort(mask_table + start, size,
1344 sizeof(struct gfar_mask_entry),
1345 gfar_comp, &gfar_swap);
1346
1347 /* Toggle order for every block. This makes the
1348 * thing more efficient! */
1349 if (gfar_comp == gfar_comp_desc)
1350 gfar_comp = &gfar_comp_asc;
1351 else
1352 gfar_comp = &gfar_comp_desc;
1353
1354 new_first = mask_table[start].start + 1;
1355 new_last = mask_table[i - 1].end;
1356
1357 gfar_swap_ff80_bits(&temp_table->fe[new_first],
1358 &temp_table->fe[old_first],
1359 &temp_table->fe[new_last],
1360 &temp_table->fe[old_last]);
1361
1362 start = i;
1363 size = 0;
1364 }
1365 size++;
1366 prev = mask_table[i].block;
1367 }
1368
1369}
1370
1371/*
1372 * Reduces the number of masks needed in the filer table to save entries
1373 * This is done by sorting the masks of a depended block. A depended block is
1374 * identified by gluing ANDs or CLE. The sorting order toggles after every
1375 * block. Of course entries in scope of a mask must change their location with
1376 * it.
1377 */
1378static int gfar_optimize_filer_masks(struct filer_table *tab)
1379{
1380 struct filer_table *temp_table;
1381 struct gfar_mask_entry *mask_table;
1382
1383 u32 and_index = 0, previous_mask = 0, i = 0, j = 0, size = 0;
1384 s32 ret = 0;
1385
1386 /* We need a copy of the filer table because
1387 * we want to change its order */
1388 temp_table = kmalloc(sizeof(*temp_table), GFP_KERNEL);
1389 if (temp_table == NULL)
1390 return -ENOMEM;
1391 memcpy(temp_table, tab, sizeof(*temp_table));
1392
1393 mask_table = kcalloc(MAX_FILER_CACHE_IDX / 2 + 1,
1394 sizeof(struct gfar_mask_entry), GFP_KERNEL);
1395
1396 if (mask_table == NULL) {
1397 ret = -ENOMEM;
1398 goto end;
1399 }
1400
1401 and_index = gfar_generate_mask_table(mask_table, tab);
1402
1403 gfar_sort_mask_table(mask_table, temp_table, and_index);
1404
1405 /* Now we can copy the data from our duplicated filer table to
1406 * the real one in the order the mask table says */
1407 for (i = 0; i < and_index; i++) {
1408 size = mask_table[i].end - mask_table[i].start + 1;
1409 gfar_copy_filer_entries(&(tab->fe[j]),
1410 &(temp_table->fe[mask_table[i].start]), size);
1411 j += size;
1412 }
1413
1414 /* And finally we just have to check for duplicated masks and drop the
1415 * second ones */
1416 for (i = 0; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1417 if (tab->fe[i].ctrl == 0x80) {
1418 previous_mask = i++;
1419 break;
1420 }
1421 }
1422 for (; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
1423 if (tab->fe[i].ctrl == 0x80) {
1424 if (tab->fe[i].prop == tab->fe[previous_mask].prop) {
1425 /* Two identical ones found!
1426 * So drop the second one! */
1427 gfar_trim_filer_entries(i, i, tab);
1428 } else
1429 /* Not identical! */
1430 previous_mask = i;
1431 }
1432 }
1433
1434 kfree(mask_table);
1435end: kfree(temp_table);
1436 return ret;
1437}
1438
1439/* Write the bit-pattern from software's buffer to hardware registers */
1440static int gfar_write_filer_table(struct gfar_private *priv,
1441 struct filer_table *tab)
1442{
1443 u32 i = 0;
1444 if (tab->index > MAX_FILER_IDX - 1)
1445 return -EBUSY;
1446
1447 /* Avoid inconsistent filer table to be processed */
1448 lock_rx_qs(priv);
1449
1450 /* Fill regular entries */
1451 for (; i < MAX_FILER_IDX - 1 && (tab->fe[i].ctrl | tab->fe[i].ctrl); i++)
1452 gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
1453 /* Fill the rest with fall-troughs */
1454 for (; i < MAX_FILER_IDX - 1; i++)
1455 gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
1456 /* Last entry must be default accept
1457 * because that's what people expect */
1458 gfar_write_filer(priv, i, 0x20, 0x0);
1459
1460 unlock_rx_qs(priv);
1461
1462 return 0;
1463}
1464
1465static int gfar_check_capability(struct ethtool_rx_flow_spec *flow,
1466 struct gfar_private *priv)
1467{
1468
1469 if (flow->flow_type & FLOW_EXT) {
1470 if (~flow->m_ext.data[0] || ~flow->m_ext.data[1])
1471 netdev_warn(priv->ndev,
1472 "User-specific data not supported!\n");
1473 if (~flow->m_ext.vlan_etype)
1474 netdev_warn(priv->ndev,
1475 "VLAN-etype not supported!\n");
1476 }
1477 if (flow->flow_type == IP_USER_FLOW)
1478 if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
1479 netdev_warn(priv->ndev,
1480 "IP-Version differing from IPv4 not supported!\n");
1481
1482 return 0;
1483}
1484
1485static int gfar_process_filer_changes(struct gfar_private *priv)
1486{
1487 struct ethtool_flow_spec_container *j;
1488 struct filer_table *tab;
1489 s32 i = 0;
1490 s32 ret = 0;
1491
1492 /* So index is set to zero, too! */
1493 tab = kzalloc(sizeof(*tab), GFP_KERNEL);
1494 if (tab == NULL)
1495 return -ENOMEM;
1496
1497 /* Now convert the existing filer data from flow_spec into
1498 * filer tables binary format */
1499 list_for_each_entry(j, &priv->rx_list.list, list) {
1500 ret = gfar_convert_to_filer(&j->fs, tab);
1501 if (ret == -EBUSY) {
1502 netdev_err(priv->ndev, "Rule not added: No free space!\n");
1503 goto end;
1504 }
1505 if (ret == -1) {
1506 netdev_err(priv->ndev, "Rule not added: Unsupported Flow-type!\n");
1507 goto end;
1508 }
1509 }
1510
1511 i = tab->index;
1512
1513 /* Optimizations to save entries */
1514 gfar_cluster_filer(tab);
1515 gfar_optimize_filer_masks(tab);
1516
1517 pr_debug("\n\tSummary:\n"
1518 "\tData on hardware: %d\n"
1519 "\tCompression rate: %d%%\n",
1520 tab->index, 100 - (100 * tab->index) / i);
1521
1522 /* Write everything to hardware */
1523 ret = gfar_write_filer_table(priv, tab);
1524 if (ret == -EBUSY) {
1525 netdev_err(priv->ndev, "Rule not added: No free space!\n");
1526 goto end;
1527 }
1528
1529end: kfree(tab);
1530 return ret;
1531}
1532
1533static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow)
1534{
1535 u32 i = 0;
1536
1537 for (i = 0; i < sizeof(flow->m_u); i++)
1538 flow->m_u.hdata[i] ^= 0xFF;
1539
1540 flow->m_ext.vlan_etype ^= 0xFFFF;
1541 flow->m_ext.vlan_tci ^= 0xFFFF;
1542 flow->m_ext.data[0] ^= ~0;
1543 flow->m_ext.data[1] ^= ~0;
1544}
1545
1546static int gfar_add_cls(struct gfar_private *priv,
1547 struct ethtool_rx_flow_spec *flow)
1548{
1549 struct ethtool_flow_spec_container *temp, *comp;
1550 int ret = 0;
1551
1552 temp = kmalloc(sizeof(*temp), GFP_KERNEL);
1553 if (temp == NULL)
1554 return -ENOMEM;
1555 memcpy(&temp->fs, flow, sizeof(temp->fs));
1556
1557 gfar_invert_masks(&temp->fs);
1558 ret = gfar_check_capability(&temp->fs, priv);
1559 if (ret)
1560 goto clean_mem;
1561 /* Link in the new element at the right @location */
1562 if (list_empty(&priv->rx_list.list)) {
1563 ret = gfar_check_filer_hardware(priv);
1564 if (ret != 0)
1565 goto clean_mem;
1566 list_add(&temp->list, &priv->rx_list.list);
1567 goto process;
1568 } else {
1569
1570 list_for_each_entry(comp, &priv->rx_list.list, list) {
1571 if (comp->fs.location > flow->location) {
1572 list_add_tail(&temp->list, &comp->list);
1573 goto process;
1574 }
1575 if (comp->fs.location == flow->location) {
1576 netdev_err(priv->ndev,
1577 "Rule not added: ID %d not free!\n",
1578 flow->location);
1579 ret = -EBUSY;
1580 goto clean_mem;
1581 }
1582 }
1583 list_add_tail(&temp->list, &priv->rx_list.list);
1584 }
1585
1586process:
1587 ret = gfar_process_filer_changes(priv);
1588 if (ret)
1589 goto clean_list;
1590 priv->rx_list.count++;
1591 return ret;
1592
1593clean_list:
1594 list_del(&temp->list);
1595clean_mem:
1596 kfree(temp);
1597 return ret;
1598}
1599
1600static int gfar_del_cls(struct gfar_private *priv, u32 loc)
1601{
1602 struct ethtool_flow_spec_container *comp;
1603 u32 ret = -EINVAL;
1604
1605 if (list_empty(&priv->rx_list.list))
1606 return ret;
1607
1608 list_for_each_entry(comp, &priv->rx_list.list, list) {
1609 if (comp->fs.location == loc) {
1610 list_del(&comp->list);
1611 kfree(comp);
1612 priv->rx_list.count--;
1613 gfar_process_filer_changes(priv);
1614 ret = 0;
1615 break;
1616 }
1617 }
1618
1619 return ret;
1620
1621}
1622
1623static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
1624{
1625 struct ethtool_flow_spec_container *comp;
1626 u32 ret = -EINVAL;
1627
1628 list_for_each_entry(comp, &priv->rx_list.list, list) {
1629 if (comp->fs.location == cmd->fs.location) {
1630 memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs));
1631 gfar_invert_masks(&cmd->fs);
1632 ret = 0;
1633 break;
1634 }
1635 }
1636
1637 return ret;
1638}
1639
1640static int gfar_get_cls_all(struct gfar_private *priv,
1641 struct ethtool_rxnfc *cmd, u32 *rule_locs)
1642{
1643 struct ethtool_flow_spec_container *comp;
1644 u32 i = 0;
1645
1646 list_for_each_entry(comp, &priv->rx_list.list, list) {
1647 if (i <= cmd->rule_cnt) {
1648 rule_locs[i] = comp->fs.location;
1649 i++;
1650 }
1651 }
1652
1653 cmd->data = MAX_FILER_IDX;
1654
1655 return 0;
1656}
1657
773static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd) 1658static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
774{ 1659{
775 struct gfar_private *priv = netdev_priv(dev); 1660 struct gfar_private *priv = netdev_priv(dev);
776 int ret = 0; 1661 int ret = 0;
777 1662
778 switch(cmd->cmd) { 1663 mutex_lock(&priv->rx_queue_access);
1664
1665 switch (cmd->cmd) {
779 case ETHTOOL_SRXFH: 1666 case ETHTOOL_SRXFH:
780 ret = gfar_set_hash_opts(priv, cmd); 1667 ret = gfar_set_hash_opts(priv, cmd);
781 break; 1668 break;
1669 case ETHTOOL_SRXCLSRLINS:
1670 if (cmd->fs.ring_cookie != RX_CLS_FLOW_DISC &&
1671 cmd->fs.ring_cookie >= priv->num_rx_queues) {
1672 ret = -EINVAL;
1673 break;
1674 }
1675 ret = gfar_add_cls(priv, &cmd->fs);
1676 break;
1677 case ETHTOOL_SRXCLSRLDEL:
1678 ret = gfar_del_cls(priv, cmd->fs.location);
1679 break;
782 default: 1680 default:
783 ret = -EINVAL; 1681 ret = -EINVAL;
784 } 1682 }
785 1683
1684 mutex_unlock(&priv->rx_queue_access);
1685
1686 return ret;
1687}
1688
1689static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
1690 void *rule_locs)
1691{
1692 struct gfar_private *priv = netdev_priv(dev);
1693 int ret = 0;
1694
1695 switch (cmd->cmd) {
1696 case ETHTOOL_GRXRINGS:
1697 cmd->data = priv->num_rx_queues;
1698 break;
1699 case ETHTOOL_GRXCLSRLCNT:
1700 cmd->rule_cnt = priv->rx_list.count;
1701 break;
1702 case ETHTOOL_GRXCLSRULE:
1703 ret = gfar_get_cls(priv, cmd);
1704 break;
1705 case ETHTOOL_GRXCLSRLALL:
1706 ret = gfar_get_cls_all(priv, cmd, (u32 *) rule_locs);
1707 break;
1708 default:
1709 ret = -EINVAL;
1710 break;
1711 }
1712
786 return ret; 1713 return ret;
787} 1714}
788 1715
@@ -807,4 +1734,5 @@ const struct ethtool_ops gfar_ethtool_ops = {
807 .set_wol = gfar_set_wol, 1734 .set_wol = gfar_set_wol,
808#endif 1735#endif
809 .set_rxnfc = gfar_set_nfc, 1736 .set_rxnfc = gfar_set_nfc,
1737 .get_rxnfc = gfar_get_nfc,
810}; 1738};
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-15 21:13:07 -0500