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net: thunderx: add multicast filter management support 

The ThunderX NIC could be partitioned to up to 128 VFs and thus
represented to system. Each VF is mapped to pair BGX:LMAC, and each of VF
is configured by kernel individually. Eventually the bunch of VFs could be
mapped onto same pair BGX:LMAC and thus could cause several multicast
filtering configuration requests to LMAC with the same MAC addresses.

This commit is to add ThunderX NIC BGX filtering manipulation routines.

Signed-off-by: Vadim Lomovtsev <Vadim.Lomovtsev@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Vadim Lomovtsev 2018-03-30 04:59:49 -07:00 committed by David S. Miller
parent 3a34ecfd9d
commit ceb9ea21cc
2 changed files with 153 additions and 1 deletions
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144
drivers/net/ethernet/cavium/thunder/thunder_bgx.c
View File

@ -258,6 +258,150 @@ static void bgx_flush_dmac_cam_filter(struct bgx *bgx, int lmacid)
sizeof(u64), 0);
}
static void bgx_lmac_remove_filters(struct lmac *lmac, u8 vf_id)
{
int i = 0;
if (!lmac)
return;
/* We've got reset filters request from some of attached VF, while the
* others might want to keep their configuration. So in this case lets
* iterate over all of configured filters and decrease number of
* referencies. if some addresses get zero refs remove them from list
*/
for (i = lmac->dmacs_cfg - 1; i >= 0; i--) {
lmac->dmacs[i].vf_map &= ~BIT_ULL(vf_id);
if (!lmac->dmacs[i].vf_map) {
lmac->dmacs_cfg--;
lmac->dmacs[i].dmac = 0;
lmac->dmacs[i].vf_map = 0;
}
}
}
static int bgx_lmac_save_filter(struct lmac *lmac, u64 dmac, u8 vf_id)
{
u8 i = 0;
if (!lmac)
return -1;
/* At the same time we could have several VFs 'attached' to some
* particular LMAC, and each VF is represented as network interface
* for kernel. So from user perspective it should be possible to
* manipulate with its' (VF) receive modes. However from PF
* driver perspective we need to keep track of filter configurations
* for different VFs to prevent filter values dupes
*/
for (i = 0; i < lmac->dmacs_cfg; i++) {
if (lmac->dmacs[i].dmac == dmac) {
lmac->dmacs[i].vf_map |= BIT_ULL(vf_id);
return -1;
}
}
if (!(lmac->dmacs_cfg < lmac->dmacs_count))
return -1;
/* keep it for further tracking */
lmac->dmacs[lmac->dmacs_cfg].dmac = dmac;
lmac->dmacs[lmac->dmacs_cfg].vf_map = BIT_ULL(vf_id);
lmac->dmacs_cfg++;
return 0;
}
static int bgx_set_dmac_cam_filter_mac(struct bgx *bgx, int lmacid,
u64 cam_dmac, u8 idx)
{
struct lmac *lmac = NULL;
u64 cfg = 0;
/* skip zero addresses as meaningless */
if (!cam_dmac || !bgx)
return -1;
lmac = &bgx->lmac[lmacid];
/* configure DCAM filtering for designated LMAC */
cfg = RX_DMACX_CAM_LMACID(lmacid & LMAC_ID_MASK) |
RX_DMACX_CAM_EN | cam_dmac;
bgx_reg_write(bgx, 0, BGX_CMR_RX_DMACX_CAM +
((lmacid * lmac->dmacs_count) + idx) * sizeof(u64), cfg);
return 0;
}
void bgx_set_dmac_cam_filter(int node, int bgx_idx, int lmacid,
u64 cam_dmac, u8 vf_id)
{
struct bgx *bgx = get_bgx(node, bgx_idx);
struct lmac *lmac = NULL;
if (!bgx)
return;
lmac = &bgx->lmac[lmacid];
if (!cam_dmac)
cam_dmac = ether_addr_to_u64(lmac->mac);
/* since we might have several VFs attached to particular LMAC
* and kernel could call mcast config for each of them with the
* same MAC, check if requested MAC is already in filtering list and
* updare/prepare list of MACs to be applied later to HW filters
*/
bgx_lmac_save_filter(lmac, cam_dmac, vf_id);
}
EXPORT_SYMBOL(bgx_set_dmac_cam_filter);
void bgx_set_xcast_mode(int node, int bgx_idx, int lmacid, u8 mode)
{
struct bgx *bgx = get_bgx(node, bgx_idx);
struct lmac *lmac = NULL;
u64 cfg = 0;
u8 i = 0;
if (!bgx)
return;
lmac = &bgx->lmac[lmacid];
cfg = bgx_reg_read(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL);
if (mode & BGX_XCAST_BCAST_ACCEPT)
cfg |= BCAST_ACCEPT;
else
cfg &= ~BCAST_ACCEPT;
/* disable all MCASTs and DMAC filtering */
cfg &= ~(CAM_ACCEPT | BGX_MCAST_MODE(MCAST_MODE_MASK));
/* check requested bits and set filtergin mode appropriately */
if (mode & (BGX_XCAST_MCAST_ACCEPT)) {
cfg |= (BGX_MCAST_MODE(MCAST_MODE_ACCEPT));
} else if (mode & BGX_XCAST_MCAST_FILTER) {
cfg |= (BGX_MCAST_MODE(MCAST_MODE_CAM_FILTER) | CAM_ACCEPT);
for (i = 0; i < lmac->dmacs_cfg; i++)
bgx_set_dmac_cam_filter_mac(bgx, lmacid,
lmac->dmacs[i].dmac, i);
}
bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, cfg);
}
EXPORT_SYMBOL(bgx_set_xcast_mode);
void bgx_reset_xcast_mode(int node, int bgx_idx, int lmacid, u8 vf_id)
{
struct bgx *bgx = get_bgx(node, bgx_idx);
if (!bgx)
return;
bgx_lmac_remove_filters(&bgx->lmac[lmacid], vf_id);
bgx_flush_dmac_cam_filter(bgx, lmacid);
bgx_set_xcast_mode(node, bgx_idx, lmacid,
(BGX_XCAST_BCAST_ACCEPT | BGX_XCAST_MCAST_ACCEPT));
}
EXPORT_SYMBOL(bgx_reset_xcast_mode);
void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable)
{
struct bgx *bgx = get_bgx(node, bgx_idx);

10
drivers/net/ethernet/cavium/thunder/thunder_bgx.h
View File

@ -30,6 +30,7 @@
#define DEFAULT_PAUSE_TIME 0xFFFF
#define BGX_ID_MASK 0x3
#define LMAC_ID_MASK 0x3
#define MAX_DMAC_PER_LMAC_TNS_BYPASS_MODE 2
@ -57,7 +58,7 @@
#define BGX_CMRX_RX_FIFO_LEN 0x108
#define BGX_CMR_RX_DMACX_CAM 0x200
#define RX_DMACX_CAM_EN BIT_ULL(48)
#define RX_DMACX_CAM_LMACID(x) (x << 49)
#define RX_DMACX_CAM_LMACID(x) (((u64)x) << 49)
#define RX_DMAC_COUNT 32
#define BGX_CMR_RX_STREERING 0x300
#define RX_TRAFFIC_STEER_RULE_COUNT 8
@ -205,6 +206,13 @@
#define LMAC_INTR_LINK_UP BIT(0)
#define LMAC_INTR_LINK_DOWN BIT(1)
#define BGX_XCAST_BCAST_ACCEPT BIT(0)
#define BGX_XCAST_MCAST_ACCEPT BIT(1)
#define BGX_XCAST_MCAST_FILTER BIT(2)
void bgx_set_dmac_cam_filter(int node, int bgx_idx, int lmacid, u64 mac, u8 vf);
void bgx_reset_xcast_mode(int node, int bgx_idx, int lmacid, u8 vf);
void bgx_set_xcast_mode(int node, int bgx_idx, int lmacid, u8 mode);
void octeon_mdiobus_force_mod_depencency(void);
void bgx_lmac_rx_tx_enable(int node, int bgx_idx, int lmacid, bool enable);
void bgx_add_dmac_addr(u64 dmac, int node, int bgx_idx, int lmac);