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gianfar v5: implement nfc

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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>
This commit is contained in:
Sebastian Poehn 2011-06-20 13:57:59 -07:00 committed by David S. Miller
parent d13d6bffb4
commit 4aa3a71555
3 changed files with 989 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
drivers/net/gianfar.c
View file

@ -657,6 +657,11 @@ static int gfar_of_init(struct platform_device *ofdev, struct net_device **pdev)
priv->num_rx_queues = num_rx_qs;
priv->num_grps = 0x0;
/* Init Rx queue filer rule set linked list*/
INIT_LIST_HEAD(&priv->rx_list.list);
priv->rx_list.count = 0;
mutex_init(&priv->rx_queue_access);
model = of_get_property(np, "model", NULL);
for (i = 0; i < MAXGROUPS; i++)
@ -1150,9 +1155,8 @@ static int gfar_probe(struct platform_device *ofdev)
priv->rx_queue[i]->rxic = DEFAULT_RXIC;
}
/* enable filer if using multiple RX queues*/
if(priv->num_rx_queues > 1)
priv->rx_filer_enable = 1;
/* always enable rx filer*/
priv->rx_filer_enable = 1;
/* Enable most messages by default */
priv->msg_enable = (NETIF_MSG_IFUP << 1 ) - 1;

53
drivers/net/gianfar.h
View file

@ -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 */

930
drivers/net/gianfar_ethtool.c
View file

@ -39,6 +39,7 @@
#include <linux/ethtool.h>
#include <linux/mii.h>
#include <linux/phy.h>
#include <linux/sort.h>
#include "gianfar.h"
@ -770,19 +771,945 @@ static int gfar_set_hash_opts(struct gfar_private *priv, struct ethtool_rxnfc *c
return 0;
}
static int gfar_check_filer_hardware(struct gfar_private *priv)
{
struct gfar __iomem *regs = NULL;
u32 i;
regs = priv->gfargrp[0].regs;
/* Check if we are in FIFO mode */
i = gfar_read(&regs->ecntrl);
i &= ECNTRL_FIFM;
if (i == ECNTRL_FIFM) {
netdev_notice(priv->ndev, "Interface in FIFO mode\n");
i = gfar_read(&regs->rctrl);
i &= RCTRL_PRSDEP_MASK | RCTRL_PRSFM;
if (i == (RCTRL_PRSDEP_MASK | RCTRL_PRSFM)) {
netdev_info(priv->ndev,
"Receive Queue Filtering enabled\n");
} else {
netdev_warn(priv->ndev,
"Receive Queue Filtering disabled\n");
return -EOPNOTSUPP;
}
}
/* Or in standard mode */
else {
i = gfar_read(&regs->rctrl);
i &= RCTRL_PRSDEP_MASK;
if (i == RCTRL_PRSDEP_MASK) {
netdev_info(priv->ndev,
"Receive Queue Filtering enabled\n");
} else {
netdev_warn(priv->ndev,
"Receive Queue Filtering disabled\n");
return -EOPNOTSUPP;
}
}
/* Sets the properties for arbitrary filer rule
* to the first 4 Layer 4 Bytes */
regs->rbifx = 0xC0C1C2C3;
return 0;
}
static int gfar_comp_asc(const void *a, const void *b)
{
return memcmp(a, b, 4);
}
static int gfar_comp_desc(const void *a, const void *b)
{
return -memcmp(a, b, 4);
}
static void gfar_swap(void *a, void *b, int size)
{
u32 *_a = a;
u32 *_b = b;
swap(_a[0], _b[0]);
swap(_a[1], _b[1]);
swap(_a[2], _b[2]);
swap(_a[3], _b[3]);
}
/* Write a mask to filer cache */
static void gfar_set_mask(u32 mask, struct filer_table *tab)
{
tab->fe[tab->index].ctrl = RQFCR_AND | RQFCR_PID_MASK | RQFCR_CMP_EXACT;
tab->fe[tab->index].prop = mask;
tab->index++;
}
/* Sets parse bits (e.g. IP or TCP) */
static void gfar_set_parse_bits(u32 value, u32 mask, struct filer_table *tab)
{
gfar_set_mask(mask, tab);
tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_PID_PARSE
| RQFCR_AND;
tab->fe[tab->index].prop = value;
tab->index++;
}
static void gfar_set_general_attribute(u32 value, u32 mask, u32 flag,
struct filer_table *tab)
{
gfar_set_mask(mask, tab);
tab->fe[tab->index].ctrl = RQFCR_CMP_EXACT | RQFCR_AND | flag;
tab->fe[tab->index].prop = value;
tab->index++;
}
/*
* For setting a tuple of value and mask of type flag
* Example:
* IP-Src = 10.0.0.0/255.0.0.0
* value: 0x0A000000 mask: FF000000 flag: RQFPR_IPV4
*
* Ethtool gives us a value=0 and mask=~0 for don't care a tuple
* For a don't care mask it gives us a 0
*
* The check if don't care and the mask adjustment if mask=0 is done for VLAN
* and MAC stuff on an upper level (due to missing information on this level).
* For these guys we can discard them if they are value=0 and mask=0.
*
* Further the all masks are one-padded for better hardware efficiency.
*/
static void gfar_set_attribute(u32 value, u32 mask, u32 flag,
struct filer_table *tab)
{
switch (flag) {
/* 3bit */
case RQFCR_PID_PRI:
if (!(value | mask))
return;
mask |= RQFCR_PID_PRI_MASK;
break;
/* 8bit */
case RQFCR_PID_L4P:
case RQFCR_PID_TOS:
if (!~(mask | RQFCR_PID_L4P_MASK))
return;
if (!mask)
mask = ~0;
else
mask |= RQFCR_PID_L4P_MASK;
break;
/* 12bit */
case RQFCR_PID_VID:
if (!(value | mask))
return;
mask |= RQFCR_PID_VID_MASK;
break;
/* 16bit */
case RQFCR_PID_DPT:
case RQFCR_PID_SPT:
case RQFCR_PID_ETY:
if (!~(mask | RQFCR_PID_PORT_MASK))
return;
if (!mask)
mask = ~0;
else
mask |= RQFCR_PID_PORT_MASK;
break;
/* 24bit */
case RQFCR_PID_DAH:
case RQFCR_PID_DAL:
case RQFCR_PID_SAH:
case RQFCR_PID_SAL:
if (!(value | mask))
return;
mask |= RQFCR_PID_MAC_MASK;
break;
/* for all real 32bit masks */
default:
if (!~mask)
return;
if (!mask)
mask = ~0;
break;
}
gfar_set_general_attribute(value, mask, flag, tab);
}
/* Translates value and mask for UDP, TCP or SCTP */
static void gfar_set_basic_ip(struct ethtool_tcpip4_spec *value,
struct ethtool_tcpip4_spec *mask, struct filer_table *tab)
{
gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
gfar_set_attribute(value->pdst, mask->pdst, RQFCR_PID_DPT, tab);
gfar_set_attribute(value->psrc, mask->psrc, RQFCR_PID_SPT, tab);
gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
}
/* Translates value and mask for RAW-IP4 */
static void gfar_set_user_ip(struct ethtool_usrip4_spec *value,
struct ethtool_usrip4_spec *mask, struct filer_table *tab)
{
gfar_set_attribute(value->ip4src, mask->ip4src, RQFCR_PID_SIA, tab);
gfar_set_attribute(value->ip4dst, mask->ip4dst, RQFCR_PID_DIA, tab);
gfar_set_attribute(value->tos, mask->tos, RQFCR_PID_TOS, tab);
gfar_set_attribute(value->proto, mask->proto, RQFCR_PID_L4P, tab);
gfar_set_attribute(value->l4_4_bytes, mask->l4_4_bytes, RQFCR_PID_ARB,
tab);
}
/* Translates value and mask for ETHER spec */
static void gfar_set_ether(struct ethhdr *value, struct ethhdr *mask,
struct filer_table *tab)
{
u32 upper_temp_mask = 0;
u32 lower_temp_mask = 0;
/* Source address */
if (!is_broadcast_ether_addr(mask->h_source)) {
if (is_zero_ether_addr(mask->h_source)) {
upper_temp_mask = 0xFFFFFFFF;
lower_temp_mask = 0xFFFFFFFF;
} else {
upper_temp_mask = mask->h_source[0] << 16
| mask->h_source[1] << 8
| mask->h_source[2];
lower_temp_mask = mask->h_source[3] << 16
| mask->h_source[4] << 8
| mask->h_source[5];
}
/* Upper 24bit */
gfar_set_attribute(
value->h_source[0] << 16 | value->h_source[1]
<< 8 | value->h_source[2],
upper_temp_mask, RQFCR_PID_SAH, tab);
/* And the same for the lower part */
gfar_set_attribute(
value->h_source[3] << 16 | value->h_source[4]
<< 8 | value->h_source[5],
lower_temp_mask, RQFCR_PID_SAL, tab);
}
/* Destination address */
if (!is_broadcast_ether_addr(mask->h_dest)) {
/* Special for destination is limited broadcast */
if ((is_broadcast_ether_addr(value->h_dest)
&& is_zero_ether_addr(mask->h_dest))) {
gfar_set_parse_bits(RQFPR_EBC, RQFPR_EBC, tab);
} else {
if (is_zero_ether_addr(mask->h_dest)) {
upper_temp_mask = 0xFFFFFFFF;
lower_temp_mask = 0xFFFFFFFF;
} else {
upper_temp_mask = mask->h_dest[0] << 16
| mask->h_dest[1] << 8
| mask->h_dest[2];
lower_temp_mask = mask->h_dest[3] << 16
| mask->h_dest[4] << 8
| mask->h_dest[5];
}
/* Upper 24bit */
gfar_set_attribute(
value->h_dest[0] << 16
| value->h_dest[1] << 8
| value->h_dest[2],
upper_temp_mask, RQFCR_PID_DAH, tab);
/* And the same for the lower part */
gfar_set_attribute(
value->h_dest[3] << 16
| value->h_dest[4] << 8
| value->h_dest[5],
lower_temp_mask, RQFCR_PID_DAL, tab);
}
}
gfar_set_attribute(value->h_proto, mask->h_proto, RQFCR_PID_ETY, tab);
}
/* Convert a rule to binary filter format of gianfar */
static int gfar_convert_to_filer(struct ethtool_rx_flow_spec *rule,
struct filer_table *tab)
{
u32 vlan = 0, vlan_mask = 0;
u32 id = 0, id_mask = 0;
u32 cfi = 0, cfi_mask = 0;
u32 prio = 0, prio_mask = 0;
u32 old_index = tab->index;
/* Check if vlan is wanted */
if ((rule->flow_type & FLOW_EXT) && (rule->m_ext.vlan_tci != 0xFFFF)) {
if (!rule->m_ext.vlan_tci)
rule->m_ext.vlan_tci = 0xFFFF;
vlan = RQFPR_VLN;
vlan_mask = RQFPR_VLN;
/* Separate the fields */
id = rule->h_ext.vlan_tci & 0xFFF;
id_mask = rule->m_ext.vlan_tci & 0xFFF;
cfi = (rule->h_ext.vlan_tci >> 12) & 1;
cfi_mask = (rule->m_ext.vlan_tci >> 12) & 1;
prio = (rule->h_ext.vlan_tci >> 13) & 0x7;
prio_mask = (rule->m_ext.vlan_tci >> 13) & 0x7;
if (cfi == 1 && cfi_mask == 1) {
vlan |= RQFPR_CFI;
vlan_mask |= RQFPR_CFI;
} else if (cfi == 0 && cfi_mask == 1) {
vlan_mask |= RQFPR_CFI;
}
}
switch (rule->flow_type & ~FLOW_EXT) {
case TCP_V4_FLOW:
gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_TCP | vlan,
RQFPR_IPV4 | RQFPR_TCP | vlan_mask, tab);
gfar_set_basic_ip(&rule->h_u.tcp_ip4_spec,
&rule->m_u.tcp_ip4_spec, tab);
break;
case UDP_V4_FLOW:
gfar_set_parse_bits(RQFPR_IPV4 | RQFPR_UDP | vlan,
RQFPR_IPV4 | RQFPR_UDP | vlan_mask, tab);
gfar_set_basic_ip(&rule->h_u.udp_ip4_spec,
&rule->m_u.udp_ip4_spec, tab);
break;
case SCTP_V4_FLOW:
gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
tab);
gfar_set_attribute(132, 0, RQFCR_PID_L4P, tab);
gfar_set_basic_ip((struct ethtool_tcpip4_spec *) &rule->h_u,
(struct ethtool_tcpip4_spec *) &rule->m_u, tab);
break;
case IP_USER_FLOW:
gfar_set_parse_bits(RQFPR_IPV4 | vlan, RQFPR_IPV4 | vlan_mask,
tab);
gfar_set_user_ip((struct ethtool_usrip4_spec *) &rule->h_u,
(struct ethtool_usrip4_spec *) &rule->m_u, tab);
break;
case ETHER_FLOW:
if (vlan)
gfar_set_parse_bits(vlan, vlan_mask, tab);
gfar_set_ether((struct ethhdr *) &rule->h_u,
(struct ethhdr *) &rule->m_u, tab);
break;
default:
return -1;
}
/* Set the vlan attributes in the end */
if (vlan) {
gfar_set_attribute(id, id_mask, RQFCR_PID_VID, tab);
gfar_set_attribute(prio, prio_mask, RQFCR_PID_PRI, tab);
}
/* If there has been nothing written till now, it must be a default */
if (tab->index == old_index) {
gfar_set_mask(0xFFFFFFFF, tab);
tab->fe[tab->index].ctrl = 0x20;
tab->fe[tab->index].prop = 0x0;
tab->index++;
}
/* Remove last AND */
tab->fe[tab->index - 1].ctrl &= (~RQFCR_AND);
/* Specify which queue to use or to drop */
if (rule->ring_cookie == RX_CLS_FLOW_DISC)
tab->fe[tab->index - 1].ctrl |= RQFCR_RJE;
else
tab->fe[tab->index - 1].ctrl |= (rule->ring_cookie << 10);
/* Only big enough entries can be clustered */
if (tab->index > (old_index + 2)) {
tab->fe[old_index + 1].ctrl |= RQFCR_CLE;
tab->fe[tab->index - 1].ctrl |= RQFCR_CLE;
}
/* In rare cases the cache can be full while there is free space in hw */
if (tab->index > MAX_FILER_CACHE_IDX - 1)
return -EBUSY;
return 0;
}
/* Copy size filer entries */
static void gfar_copy_filer_entries(struct gfar_filer_entry dst[0],
struct gfar_filer_entry src[0], s32 size)
{
while (size > 0) {
size--;
dst[size].ctrl = src[size].ctrl;
dst[size].prop = src[size].prop;
}
}
/* Delete the contents of the filer-table between start and end
* and collapse them */
static int gfar_trim_filer_entries(u32 begin, u32 end, struct filer_table *tab)
{
int length;
if (end > MAX_FILER_CACHE_IDX || end < begin)
return -EINVAL;
end++;
length = end - begin;
/* Copy */
while (end < tab->index) {
tab->fe[begin].ctrl = tab->fe[end].ctrl;
tab->fe[begin++].prop = tab->fe[end++].prop;
}
/* Fill up with don't cares */
while (begin < tab->index) {
tab->fe[begin].ctrl = 0x60;
tab->fe[begin].prop = 0xFFFFFFFF;
begin++;
}
tab->index -= length;
return 0;
}
/* Make space on the wanted location */
static int gfar_expand_filer_entries(u32 begin, u32 length,
struct filer_table *tab)
{
if (length == 0 || length + tab->index > MAX_FILER_CACHE_IDX || begin
> MAX_FILER_CACHE_IDX)
return -EINVAL;
gfar_copy_filer_entries(&(tab->fe[begin + length]), &(tab->fe[begin]),
tab->index - length + 1);
tab->index += length;
return 0;
}
static int gfar_get_next_cluster_start(int start, struct filer_table *tab)
{
for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) {
if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE))
== (RQFCR_AND | RQFCR_CLE))
return start;
}
return -1;
}
static int gfar_get_next_cluster_end(int start, struct filer_table *tab)
{
for (; (start < tab->index) && (start < MAX_FILER_CACHE_IDX - 1); start++) {
if ((tab->fe[start].ctrl & (RQFCR_AND | RQFCR_CLE))
== (RQFCR_CLE))
return start;
}
return -1;
}
/*
* Uses hardwares clustering option to reduce
* the number of filer table entries
*/
static void gfar_cluster_filer(struct filer_table *tab)
{
s32 i = -1, j, iend, jend;
while ((i = gfar_get_next_cluster_start(++i, tab)) != -1) {
j = i;
while ((j = gfar_get_next_cluster_start(++j, tab)) != -1) {
/*
* The cluster entries self and the previous one
* (a mask) must be identical!
*/
if (tab->fe[i].ctrl != tab->fe[j].ctrl)
break;
if (tab->fe[i].prop != tab->fe[j].prop)
break;
if (tab->fe[i - 1].ctrl != tab->fe[j - 1].ctrl)
break;
if (tab->fe[i - 1].prop != tab->fe[j - 1].prop)
break;
iend = gfar_get_next_cluster_end(i, tab);
jend = gfar_get_next_cluster_end(j, tab);
if (jend == -1 || iend == -1)
break;
/*
* First we make some free space, where our cluster
* element should be. Then we copy it there and finally
* delete in from its old location.
*/
if (gfar_expand_filer_entries(iend, (jend - j), tab)
== -EINVAL)
break;
gfar_copy_filer_entries(&(tab->fe[iend + 1]),
&(tab->fe[jend + 1]), jend - j);
if (gfar_trim_filer_entries(jend - 1,
jend + (jend - j), tab) == -EINVAL)
return;
/* Mask out cluster bit */
tab->fe[iend].ctrl &= ~(RQFCR_CLE);
}
}
}
/* Swaps the 0xFF80 masked bits of a1<>a2 and b1<>b2 */
static void gfar_swap_ff80_bits(struct gfar_filer_entry *a1,
struct gfar_filer_entry *a2, struct gfar_filer_entry *b1,
struct gfar_filer_entry *b2)
{
u32 temp[4];
temp[0] = a1->ctrl & 0xFF80;
temp[1] = a2->ctrl & 0xFF80;
temp[2] = b1->ctrl & 0xFF80;
temp[3] = b2->ctrl & 0xFF80;
a1->ctrl &= ~0xFF80;
a2->ctrl &= ~0xFF80;
b1->ctrl &= ~0xFF80;
b2->ctrl &= ~0xFF80;
a1->ctrl |= temp[1];
a2->ctrl |= temp[0];
b1->ctrl |= temp[3];
b2->ctrl |= temp[2];
}
/*
* Generate a list consisting of masks values with their start and
* end of validity and block as indicator for parts belonging
* together (glued by ANDs) in mask_table
*/
static u32 gfar_generate_mask_table(struct gfar_mask_entry *mask_table,
struct filer_table *tab)
{
u32 i, and_index = 0, block_index = 1;
for (i = 0; i < tab->index; i++) {
/* LSByte of control = 0 sets a mask */
if (!(tab->fe[i].ctrl & 0xF)) {
mask_table[and_index].mask = tab->fe[i].prop;
mask_table[and_index].start = i;
mask_table[and_index].block = block_index;
if (and_index >= 1)
mask_table[and_index - 1].end = i - 1;
and_index++;
}
/* cluster starts will be separated because they should
* hold their position */
if (tab->fe[i].ctrl & RQFCR_CLE)
block_index++;
/* A not set AND indicates the end of a depended block */
if (!(tab->fe[i].ctrl & RQFCR_AND))
block_index++;
}
mask_table[and_index - 1].end = i - 1;
return and_index;
}
/*
* Sorts the entries of mask_table by the values of the masks.
* Important: The 0xFF80 flags of the first and last entry of a
* block must hold their position (which queue, CLusterEnable, ReJEct,
* AND)
*/
static void gfar_sort_mask_table(struct gfar_mask_entry *mask_table,
struct filer_table *temp_table, u32 and_index)
{
/* Pointer to compare function (_asc or _desc) */
int (*gfar_comp)(const void *, const void *);
u32 i, size = 0, start = 0, prev = 1;
u32 old_first, old_last, new_first, new_last;
gfar_comp = &gfar_comp_desc;
for (i = 0; i < and_index; i++) {
if (prev != mask_table[i].block) {
old_first = mask_table[start].start + 1;
old_last = mask_table[i - 1].end;
sort(mask_table + start, size,
sizeof(struct gfar_mask_entry),
gfar_comp, &gfar_swap);
/* Toggle order for every block. This makes the
* thing more efficient! */
if (gfar_comp == gfar_comp_desc)
gfar_comp = &gfar_comp_asc;
else
gfar_comp = &gfar_comp_desc;
new_first = mask_table[start].start + 1;
new_last = mask_table[i - 1].end;
gfar_swap_ff80_bits(&temp_table->fe[new_first],
&temp_table->fe[old_first],
&temp_table->fe[new_last],
&temp_table->fe[old_last]);
start = i;
size = 0;
}
size++;
prev = mask_table[i].block;
}
}
/*
* Reduces the number of masks needed in the filer table to save entries
* This is done by sorting the masks of a depended block. A depended block is
* identified by gluing ANDs or CLE. The sorting order toggles after every
* block. Of course entries in scope of a mask must change their location with
* it.
*/
static int gfar_optimize_filer_masks(struct filer_table *tab)
{
struct filer_table *temp_table;
struct gfar_mask_entry *mask_table;
u32 and_index = 0, previous_mask = 0, i = 0, j = 0, size = 0;
s32 ret = 0;
/* We need a copy of the filer table because
* we want to change its order */
temp_table = kmalloc(sizeof(*temp_table), GFP_KERNEL);
if (temp_table == NULL)
return -ENOMEM;
memcpy(temp_table, tab, sizeof(*temp_table));
mask_table = kcalloc(MAX_FILER_CACHE_IDX / 2 + 1,
sizeof(struct gfar_mask_entry), GFP_KERNEL);
if (mask_table == NULL) {
ret = -ENOMEM;
goto end;
}
and_index = gfar_generate_mask_table(mask_table, tab);
gfar_sort_mask_table(mask_table, temp_table, and_index);
/* Now we can copy the data from our duplicated filer table to
* the real one in the order the mask table says */
for (i = 0; i < and_index; i++) {
size = mask_table[i].end - mask_table[i].start + 1;
gfar_copy_filer_entries(&(tab->fe[j]),
&(temp_table->fe[mask_table[i].start]), size);
j += size;
}
/* And finally we just have to check for duplicated masks and drop the
* second ones */
for (i = 0; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
if (tab->fe[i].ctrl == 0x80) {
previous_mask = i++;
break;
}
}
for (; i < tab->index && i < MAX_FILER_CACHE_IDX; i++) {
if (tab->fe[i].ctrl == 0x80) {
if (tab->fe[i].prop == tab->fe[previous_mask].prop) {
/* Two identical ones found!
* So drop the second one! */
gfar_trim_filer_entries(i, i, tab);
} else
/* Not identical! */
previous_mask = i;
}
}
kfree(mask_table);
end: kfree(temp_table);
return ret;
}
/* Write the bit-pattern from software's buffer to hardware registers */
static int gfar_write_filer_table(struct gfar_private *priv,
struct filer_table *tab)
{
u32 i = 0;
if (tab->index > MAX_FILER_IDX - 1)
return -EBUSY;
/* Avoid inconsistent filer table to be processed */
lock_rx_qs(priv);
/* Fill regular entries */
for (; i < MAX_FILER_IDX - 1 && (tab->fe[i].ctrl | tab->fe[i].ctrl); i++)
gfar_write_filer(priv, i, tab->fe[i].ctrl, tab->fe[i].prop);
/* Fill the rest with fall-troughs */
for (; i < MAX_FILER_IDX - 1; i++)
gfar_write_filer(priv, i, 0x60, 0xFFFFFFFF);
/* Last entry must be default accept
* because that's what people expect */
gfar_write_filer(priv, i, 0x20, 0x0);
unlock_rx_qs(priv);
return 0;
}
static int gfar_check_capability(struct ethtool_rx_flow_spec *flow,
struct gfar_private *priv)
{
if (flow->flow_type & FLOW_EXT) {
if (~flow->m_ext.data[0] || ~flow->m_ext.data[1])
netdev_warn(priv->ndev,
"User-specific data not supported!\n");
if (~flow->m_ext.vlan_etype)
netdev_warn(priv->ndev,
"VLAN-etype not supported!\n");
}
if (flow->flow_type == IP_USER_FLOW)
if (flow->h_u.usr_ip4_spec.ip_ver != ETH_RX_NFC_IP4)
netdev_warn(priv->ndev,
"IP-Version differing from IPv4 not supported!\n");
return 0;
}
static int gfar_process_filer_changes(struct gfar_private *priv)
{
struct ethtool_flow_spec_container *j;
struct filer_table *tab;
s32 i = 0;
s32 ret = 0;
/* So index is set to zero, too! */
tab = kzalloc(sizeof(*tab), GFP_KERNEL);
if (tab == NULL)
return -ENOMEM;
/* Now convert the existing filer data from flow_spec into
* filer tables binary format */
list_for_each_entry(j, &priv->rx_list.list, list) {
ret = gfar_convert_to_filer(&j->fs, tab);
if (ret == -EBUSY) {
netdev_err(priv->ndev, "Rule not added: No free space!\n");
goto end;
}
if (ret == -1) {
netdev_err(priv->ndev, "Rule not added: Unsupported Flow-type!\n");
goto end;
}
}
i = tab->index;
/* Optimizations to save entries */
gfar_cluster_filer(tab);
gfar_optimize_filer_masks(tab);
pr_debug("\n\tSummary:\n"
"\tData on hardware: %d\n"
"\tCompression rate: %d%%\n",
tab->index, 100 - (100 * tab->index) / i);
/* Write everything to hardware */
ret = gfar_write_filer_table(priv, tab);
if (ret == -EBUSY) {
netdev_err(priv->ndev, "Rule not added: No free space!\n");
goto end;
}
end: kfree(tab);
return ret;
}
static void gfar_invert_masks(struct ethtool_rx_flow_spec *flow)
{
u32 i = 0;
for (i = 0; i < sizeof(flow->m_u); i++)
flow->m_u.hdata[i] ^= 0xFF;
flow->m_ext.vlan_etype ^= 0xFFFF;
flow->m_ext.vlan_tci ^= 0xFFFF;
flow->m_ext.data[0] ^= ~0;
flow->m_ext.data[1] ^= ~0;
}
static int gfar_add_cls(struct gfar_private *priv,
struct ethtool_rx_flow_spec *flow)
{
struct ethtool_flow_spec_container *temp, *comp;
int ret = 0;
temp = kmalloc(sizeof(*temp), GFP_KERNEL);
if (temp == NULL)
return -ENOMEM;
memcpy(&temp->fs, flow, sizeof(temp->fs));
gfar_invert_masks(&temp->fs);
ret = gfar_check_capability(&temp->fs, priv);
if (ret)
goto clean_mem;
/* Link in the new element at the right @location */
if (list_empty(&priv->rx_list.list)) {
ret = gfar_check_filer_hardware(priv);
if (ret != 0)
goto clean_mem;
list_add(&temp->list, &priv->rx_list.list);
goto process;
} else {
list_for_each_entry(comp, &priv->rx_list.list, list) {
if (comp->fs.location > flow->location) {
list_add_tail(&temp->list, &comp->list);
goto process;
}
if (comp->fs.location == flow->location) {
netdev_err(priv->ndev,
"Rule not added: ID %d not free!\n",
flow->location);
ret = -EBUSY;
goto clean_mem;
}
}
list_add_tail(&temp->list, &priv->rx_list.list);
}
process:
ret = gfar_process_filer_changes(priv);
if (ret)
goto clean_list;
priv->rx_list.count++;
return ret;
clean_list:
list_del(&temp->list);
clean_mem:
kfree(temp);
return ret;
}
static int gfar_del_cls(struct gfar_private *priv, u32 loc)
{
struct ethtool_flow_spec_container *comp;
u32 ret = -EINVAL;
if (list_empty(&priv->rx_list.list))
return ret;
list_for_each_entry(comp, &priv->rx_list.list, list) {
if (comp->fs.location == loc) {
list_del(&comp->list);
kfree(comp);
priv->rx_list.count--;
gfar_process_filer_changes(priv);
ret = 0;
break;
}
}
return ret;
}
static int gfar_get_cls(struct gfar_private *priv, struct ethtool_rxnfc *cmd)
{
struct ethtool_flow_spec_container *comp;
u32 ret = -EINVAL;
list_for_each_entry(comp, &priv->rx_list.list, list) {
if (comp->fs.location == cmd->fs.location) {
memcpy(&cmd->fs, &comp->fs, sizeof(cmd->fs));
gfar_invert_masks(&cmd->fs);
ret = 0;
break;
}
}
return ret;
}
static int gfar_get_cls_all(struct gfar_private *priv,
struct ethtool_rxnfc *cmd, u32 *rule_locs)
{
struct ethtool_flow_spec_container *comp;
u32 i = 0;
list_for_each_entry(comp, &priv->rx_list.list, list) {
if (i <= cmd->rule_cnt) {
rule_locs[i] = comp->fs.location;
i++;
}
}
cmd->data = MAX_FILER_IDX;
return 0;
}
static int gfar_set_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd)
{
struct gfar_private *priv = netdev_priv(dev);
int ret = 0;
switch(cmd->cmd) {
mutex_lock(&priv->rx_queue_access);
switch (cmd->cmd) {
case ETHTOOL_SRXFH:
ret = gfar_set_hash_opts(priv, cmd);
break;
case ETHTOOL_SRXCLSRLINS:
if (cmd->fs.ring_cookie != RX_CLS_FLOW_DISC &&
cmd->fs.ring_cookie >= priv->num_rx_queues) {
ret = -EINVAL;
break;
}
ret = gfar_add_cls(priv, &cmd->fs);
break;
case ETHTOOL_SRXCLSRLDEL:
ret = gfar_del_cls(priv, cmd->fs.location);
break;
default:
ret = -EINVAL;
}
mutex_unlock(&priv->rx_queue_access);
return ret;
}
static int gfar_get_nfc(struct net_device *dev, struct ethtool_rxnfc *cmd,
void *rule_locs)
{
struct gfar_private *priv = netdev_priv(dev);
int ret = 0;
switch (cmd->cmd) {
case ETHTOOL_GRXRINGS:
cmd->data = priv->num_rx_queues;
break;
case ETHTOOL_GRXCLSRLCNT:
cmd->rule_cnt = priv->rx_list.count;
break;
case ETHTOOL_GRXCLSRULE:
ret = gfar_get_cls(priv, cmd);
break;
case ETHTOOL_GRXCLSRLALL:
ret = gfar_get_cls_all(priv, cmd, (u32 *) rule_locs);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
@ -807,4 +1734,5 @@ const struct ethtool_ops gfar_ethtool_ops = {
.set_wol = gfar_set_wol,
#endif
.set_rxnfc = gfar_set_nfc,
.get_rxnfc = gfar_get_nfc,
};