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gianfar: Basic Support for programming hash rules
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This patch provides basic hash rules programming via the ethtool
interface.

Signed-off-by: Sandeep Gopalpet <Sandeep.Kumar@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Sandeep Gopalpet authored and David S. Miller committed Nov 3, 2009
1 parent 46ceb60 commit 7a8b337
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73 changes: 73 additions & 0 deletions drivers/net/gianfar.c
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Original file line number Diff line number Diff line change
Expand Up @@ -431,6 +431,9 @@ static const struct net_device_ops gfar_netdev_ops = {
#endif
};

unsigned int ftp_rqfpr[MAX_FILER_IDX + 1];
unsigned int ftp_rqfcr[MAX_FILER_IDX + 1];

void lock_rx_qs(struct gfar_private *priv)
{
int i = 0x0;
Expand Down Expand Up @@ -766,6 +769,73 @@ static unsigned int reverse_bitmap(unsigned int bit_map, unsigned int max_qs)
}
return new_bit_map;
}

u32 cluster_entry_per_class(struct gfar_private *priv, u32 rqfar, u32 class)
{
u32 rqfpr = FPR_FILER_MASK;
u32 rqfcr = 0x0;

rqfar--;
rqfcr = RQFCR_CLE | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
ftp_rqfpr[rqfar] = rqfpr;
ftp_rqfcr[rqfar] = rqfcr;
gfar_write_filer(priv, rqfar, rqfcr, rqfpr);

rqfar--;
rqfcr = RQFCR_CMP_NOMATCH;
ftp_rqfpr[rqfar] = rqfpr;
ftp_rqfcr[rqfar] = rqfcr;
gfar_write_filer(priv, rqfar, rqfcr, rqfpr);

rqfar--;
rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_PARSE | RQFCR_CLE | RQFCR_AND;
rqfpr = class;
ftp_rqfcr[rqfar] = rqfcr;
ftp_rqfpr[rqfar] = rqfpr;
gfar_write_filer(priv, rqfar, rqfcr, rqfpr);

rqfar--;
rqfcr = RQFCR_CMP_EXACT | RQFCR_PID_MASK | RQFCR_AND;
rqfpr = class;
ftp_rqfcr[rqfar] = rqfcr;
ftp_rqfpr[rqfar] = rqfpr;
gfar_write_filer(priv, rqfar, rqfcr, rqfpr);

return rqfar;
}

static void gfar_init_filer_table(struct gfar_private *priv)
{
int i = 0x0;
u32 rqfar = MAX_FILER_IDX;
u32 rqfcr = 0x0;
u32 rqfpr = FPR_FILER_MASK;

/* Default rule */
rqfcr = RQFCR_CMP_MATCH;
ftp_rqfcr[rqfar] = rqfcr;
ftp_rqfpr[rqfar] = rqfpr;
gfar_write_filer(priv, rqfar, rqfcr, rqfpr);

rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6);
rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_UDP);
rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV6 | RQFPR_TCP);
rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4);
rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_UDP);
rqfar = cluster_entry_per_class(priv, rqfar, RQFPR_IPV4 | RQFPR_TCP);

/* cur_filer_idx indicated the fisrt non-masked rule */
priv->cur_filer_idx = rqfar;

/* Rest are masked rules */
rqfcr = RQFCR_CMP_NOMATCH;
for (i = 0; i < rqfar; i++) {
ftp_rqfcr[i] = rqfcr;
ftp_rqfpr[i] = rqfpr;
gfar_write_filer(priv, i, rqfcr, rqfpr);
}
}

/* Set up the ethernet device structure, private data,
* and anything else we need before we start */
static int gfar_probe(struct of_device *ofdev,
Expand Down Expand Up @@ -1005,6 +1075,9 @@ static int gfar_probe(struct of_device *ofdev,
priv->gfargrp[i].int_name_tx[len_devname] = '\0';
}

/* Initialize the filer table */
gfar_init_filer_table(priv);

/* Create all the sysfs files */
gfar_init_sysfs(dev);

Expand Down
93 changes: 93 additions & 0 deletions drivers/net/gianfar.h
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Original file line number Diff line number Diff line change
Expand Up @@ -381,6 +381,84 @@ extern const char gfar_driver_version[];
#define BD_LFLAG(flags) ((flags) << 16)
#define BD_LENGTH_MASK 0x0000ffff

#define CLASS_CODE_UNRECOG 0x00
#define CLASS_CODE_DUMMY1 0x01
#define CLASS_CODE_ETHERTYPE1 0x02
#define CLASS_CODE_ETHERTYPE2 0x03
#define CLASS_CODE_USER_PROG1 0x04
#define CLASS_CODE_USER_PROG2 0x05
#define CLASS_CODE_USER_PROG3 0x06
#define CLASS_CODE_USER_PROG4 0x07
#define CLASS_CODE_TCP_IPV4 0x08
#define CLASS_CODE_UDP_IPV4 0x09
#define CLASS_CODE_AH_ESP_IPV4 0x0a
#define CLASS_CODE_SCTP_IPV4 0x0b
#define CLASS_CODE_TCP_IPV6 0x0c
#define CLASS_CODE_UDP_IPV6 0x0d
#define CLASS_CODE_AH_ESP_IPV6 0x0e
#define CLASS_CODE_SCTP_IPV6 0x0f

#define FPR_FILER_MASK 0xFFFFFFFF
#define MAX_FILER_IDX 0xFF

/* RQFCR register bits */
#define RQFCR_GPI 0x80000000
#define RQFCR_HASHTBL_Q 0x00000000
#define RQFCR_HASHTBL_0 0x00020000
#define RQFCR_HASHTBL_1 0x00040000
#define RQFCR_HASHTBL_2 0x00060000
#define RQFCR_HASHTBL_3 0x00080000
#define RQFCR_HASH 0x00010000
#define RQFCR_CLE 0x00000200
#define RQFCR_RJE 0x00000100
#define RQFCR_AND 0x00000080
#define RQFCR_CMP_EXACT 0x00000000
#define RQFCR_CMP_MATCH 0x00000020
#define RQFCR_CMP_NOEXACT 0x00000040
#define RQFCR_CMP_NOMATCH 0x00000060

/* RQFCR PID values */
#define RQFCR_PID_MASK 0x00000000
#define RQFCR_PID_PARSE 0x00000001
#define RQFCR_PID_ARB 0x00000002
#define RQFCR_PID_DAH 0x00000003
#define RQFCR_PID_DAL 0x00000004
#define RQFCR_PID_SAH 0x00000005
#define RQFCR_PID_SAL 0x00000006
#define RQFCR_PID_ETY 0x00000007
#define RQFCR_PID_VID 0x00000008
#define RQFCR_PID_PRI 0x00000009
#define RQFCR_PID_TOS 0x0000000A
#define RQFCR_PID_L4P 0x0000000B
#define RQFCR_PID_DIA 0x0000000C
#define RQFCR_PID_SIA 0x0000000D
#define RQFCR_PID_DPT 0x0000000E
#define RQFCR_PID_SPT 0x0000000F

/* RQFPR when PID is 0x0001 */
#define RQFPR_HDR_GE_512 0x00200000
#define RQFPR_LERR 0x00100000
#define RQFPR_RAR 0x00080000
#define RQFPR_RARQ 0x00040000
#define RQFPR_AR 0x00020000
#define RQFPR_ARQ 0x00010000
#define RQFPR_EBC 0x00008000
#define RQFPR_VLN 0x00004000
#define RQFPR_CFI 0x00002000
#define RQFPR_JUM 0x00001000
#define RQFPR_IPF 0x00000800
#define RQFPR_FIF 0x00000400
#define RQFPR_IPV4 0x00000200
#define RQFPR_IPV6 0x00000100
#define RQFPR_ICC 0x00000080
#define RQFPR_ICV 0x00000040
#define RQFPR_TCP 0x00000020
#define RQFPR_UDP 0x00000010
#define RQFPR_TUC 0x00000008
#define RQFPR_TUV 0x00000004
#define RQFPR_PER 0x00000002
#define RQFPR_EER 0x00000001

/* TxBD status field bits */
#define TXBD_READY 0x8000
#define TXBD_PADCRC 0x4000
Expand Down Expand Up @@ -959,6 +1037,8 @@ struct gfar_private {
unsigned int rx_stash_size;
unsigned int rx_stash_index;

u32 cur_filer_idx;

struct sk_buff_head rx_recycle;

struct vlan_group *vlgrp;
Expand Down Expand Up @@ -1002,6 +1082,9 @@ struct gfar_private {
struct gfar_extra_stats extra_stats;
};

extern unsigned int ftp_rqfpr[MAX_FILER_IDX + 1];
extern unsigned int ftp_rqfcr[MAX_FILER_IDX + 1];

static inline u32 gfar_read(volatile unsigned __iomem *addr)
{
u32 val;
Expand All @@ -1014,6 +1097,16 @@ static inline void gfar_write(volatile unsigned __iomem *addr, u32 val)
out_be32(addr, val);
}

static inline void gfar_write_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);
gfar_write(&regs->rqfcr, fcr);
gfar_write(&regs->rqfpr, fpr);
}

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);
Expand Down
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