gianfar v5: implement nfc

This patch adds all missing functionalities for nfc except GRXFH. There is so much code because hardware has not a TCAM.
Further hardware rule space is very limited. So I had to extensively use
optimization features. Both reasons lead to the necessity to hold all
online flows in a linked-list.

Change-log:
# Some suggestions by Joe Perches applied (thanks!)
# Shorted some logs
# Use memcmp() for comparing

Signed-off-by: Sebastian Poehn <sebastian.poehn@belden.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 53 insertions, 0 deletions

diff --git a/drivers/net/gianfar.h b/drivers/net/gianfar.h
index fc86f5195445..a4e690a9aeb9 100644
--- a/drivers/net/gianfar.h
+++ b/drivers/net/gianfar.h
@@ -47,6 +47,16 @@
 #include <linux/workqueue.h>
 #include <linux/ethtool.h>
 
+struct ethtool_flow_spec_container {
+        struct ethtool_rx_flow_spec fs;
+        struct list_head list;
+};
+
+struct ethtool_rx_list {
+        struct list_head list;
+        unsigned int count;
+};
+
 /* The maximum number of packets to be handled in one call of gfar_poll */
 #define GFAR_DEV_WEIGHT 64
 
@@ -168,6 +178,7 @@ extern const char gfar_driver_version[];
 #define MACCFG2_LENGTHCHECK     0x00000010
 #define MACCFG2_MPEN            0x00000008
 
+#define ECNTRL_FIFM             0x00008000
 #define ECNTRL_INIT_SETTINGS    0x00001000
 #define ECNTRL_TBI_MODE         0x00000020
 #define ECNTRL_REDUCED_MODE     0x00000010
@@ -271,6 +282,7 @@ extern const char gfar_driver_version[];
 #define RCTRL_TUCSEN            0x00000100
 #define RCTRL_PRSDEP_MASK       0x000000c0
 #define RCTRL_PRSDEP_INIT       0x000000c0
+#define RCTRL_PRSFM             0x00000020
 #define RCTRL_PROM              0x00000008
 #define RCTRL_EMEN              0x00000002
 #define RCTRL_REQ_PARSER        (RCTRL_VLEX | RCTRL_IPCSEN | \
@@ -1066,6 +1078,9 @@ struct gfar_private {
 
         struct vlan_group *vlgrp;
 
+        /* RX queue filer rule set*/
+        struct ethtool_rx_list rx_list;
+        struct mutex rx_queue_access;
 
         /* Hash registers and their width */
         u32 __iomem *hash_regs[16];
@@ -1140,6 +1155,16 @@ static inline void gfar_write_filer(struct gfar_private *priv,
         gfar_write(&regs->rqfpr, fpr);
 }
 
+static inline void gfar_read_filer(struct gfar_private *priv,
+                unsigned int far, unsigned int *fcr, unsigned int *fpr)
+{
+        struct gfar __iomem *regs = priv->gfargrp[0].regs;
+
+        gfar_write(&regs->rqfar, far);
+        *fcr = gfar_read(&regs->rqfcr);
+        *fpr = gfar_read(&regs->rqfpr);
+}
+
 extern void lock_rx_qs(struct gfar_private *priv);
 extern void lock_tx_qs(struct gfar_private *priv);
 extern void unlock_rx_qs(struct gfar_private *priv);
@@ -1157,4 +1182,32 @@ int gfar_set_features(struct net_device *dev, u32 features);
 
 extern const struct ethtool_ops gfar_ethtool_ops;
 
+#define MAX_FILER_CACHE_IDX (2*(MAX_FILER_IDX))
+
+#define RQFCR_PID_PRI_MASK 0xFFFFFFF8
+#define RQFCR_PID_L4P_MASK 0xFFFFFF00
+#define RQFCR_PID_VID_MASK 0xFFFFF000
+#define RQFCR_PID_PORT_MASK 0xFFFF0000
+#define RQFCR_PID_MAC_MASK 0xFF000000
+
+struct gfar_mask_entry {
+        unsigned int mask; /* The mask value which is valid form start to end */
+        unsigned int start;
+        unsigned int end;
+        unsigned int block; /* Same block values indicate depended entries */
+};
+
+/* Represents a receive filer table entry */
+struct gfar_filer_entry {
+        u32 ctrl;
+        u32 prop;
+};
+
+
+/* The 20 additional entries are a shadow for one extra element */
+struct filer_table {
+        u32 index;
+        struct gfar_filer_entry fe[MAX_FILER_CACHE_IDX + 20];
+};
+
 #endif /* __GIANFAR_H */