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net: thunderx: Support for different LMAC types within BGX
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On 88xx all LMACs in a BGX will be in same mode but on 81xx
BGX can be split as two and there can be LMACs configured in
different modes.

These changes move lmac_type, lane2serdes fields into per lmac
struct from BGX struct. Got rid of qlm_mode field which has become
redundant with these changes. And now no of valid LMACs is read
from CSRs configured by low level firmware and figuring out the
same based on QLM mode is discarded

Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Sunil Goutham authored and David S. Miller committed Aug 13, 2016
1 parent 52358aa commit 0bcb7d5
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Showing 2 changed files with 98 additions and 136 deletions.
224 changes: 98 additions & 126 deletions drivers/net/ethernet/cavium/thunder/thunder_bgx.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,9 @@ struct lmac {
struct bgx *bgx;
int dmac;
u8 mac[ETH_ALEN];
u8 lmac_type;
u8 lane_to_sds;
bool use_training;
bool link_up;
int lmacid; /* ID within BGX */
int lmacid_bd; /* ID on board */
Expand All @@ -43,12 +46,8 @@ struct lmac {

struct bgx {
u8 bgx_id;
u8 qlm_mode;
struct lmac lmac[MAX_LMAC_PER_BGX];
int lmac_count;
int lmac_type;
int lane_to_sds;
int use_training;
void __iomem *reg_base;
struct pci_dev *pdev;
};
Expand Down Expand Up @@ -418,9 +417,10 @@ static int bgx_lmac_sgmii_init(struct bgx *bgx, int lmacid)
return 0;
}

static int bgx_lmac_xaui_init(struct bgx *bgx, int lmacid, int lmac_type)
static int bgx_lmac_xaui_init(struct bgx *bgx, struct lmac *lmac)
{
u64 cfg;
int lmacid = lmac->lmacid;

/* Reset SPU */
bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_RESET);
Expand All @@ -436,7 +436,7 @@ static int bgx_lmac_xaui_init(struct bgx *bgx, int lmacid, int lmac_type)

bgx_reg_modify(bgx, lmacid, BGX_SPUX_CONTROL1, SPU_CTL_LOW_POWER);
/* Set interleaved running disparity for RXAUI */
if (bgx->lmac_type != BGX_MODE_RXAUI)
if (lmac->lmac_type != BGX_MODE_RXAUI)
bgx_reg_modify(bgx, lmacid,
BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS);
else
Expand All @@ -451,7 +451,7 @@ static int bgx_lmac_xaui_init(struct bgx *bgx, int lmacid, int lmac_type)
cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
bgx_reg_write(bgx, lmacid, BGX_SPUX_INT, cfg);

if (bgx->use_training) {
if (lmac->use_training) {
bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LP_CUP, 0x00);
bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_CUP, 0x00);
bgx_reg_write(bgx, lmacid, BGX_SPUX_BR_PMD_LD_REP, 0x00);
Expand All @@ -474,9 +474,9 @@ static int bgx_lmac_xaui_init(struct bgx *bgx, int lmacid, int lmac_type)
bgx_reg_write(bgx, lmacid, BGX_SPUX_AN_CONTROL, cfg);

cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_AN_ADV);
if (bgx->lmac_type == BGX_MODE_10G_KR)
if (lmac->lmac_type == BGX_MODE_10G_KR)
cfg |= (1 << 23);
else if (bgx->lmac_type == BGX_MODE_40G_KR)
else if (lmac->lmac_type == BGX_MODE_40G_KR)
cfg |= (1 << 24);
else
cfg &= ~((1 << 23) | (1 << 24));
Expand Down Expand Up @@ -511,11 +511,11 @@ static int bgx_xaui_check_link(struct lmac *lmac)
{
struct bgx *bgx = lmac->bgx;
int lmacid = lmac->lmacid;
int lmac_type = bgx->lmac_type;
int lmac_type = lmac->lmac_type;
u64 cfg;

bgx_reg_modify(bgx, lmacid, BGX_SPUX_MISC_CONTROL, SPU_MISC_CTL_RX_DIS);
if (bgx->use_training) {
if (lmac->use_training) {
cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
if (!(cfg & (1ull << 13))) {
cfg = (1ull << 13) | (1ull << 14);
Expand Down Expand Up @@ -556,7 +556,7 @@ static int bgx_xaui_check_link(struct lmac *lmac)
BGX_SPUX_STATUS2, SPU_STATUS2_RCVFLT);
if (bgx_reg_read(bgx, lmacid, BGX_SPUX_STATUS2) & SPU_STATUS2_RCVFLT) {
dev_err(&bgx->pdev->dev, "Receive fault, retry training\n");
if (bgx->use_training) {
if (lmac->use_training) {
cfg = bgx_reg_read(bgx, lmacid, BGX_SPUX_INT);
if (!(cfg & (1ull << 13))) {
cfg = (1ull << 13) | (1ull << 14);
Expand Down Expand Up @@ -599,7 +599,7 @@ static int bgx_xaui_check_link(struct lmac *lmac)
/* Rx local/remote fault seen.
* Do lmac reinit to see if condition recovers
*/
bgx_lmac_xaui_init(bgx, lmacid, bgx->lmac_type);
bgx_lmac_xaui_init(bgx, lmac);

return -1;
}
Expand All @@ -623,7 +623,7 @@ static void bgx_poll_for_link(struct work_struct *work)
if ((spu_link & SPU_STATUS1_RCV_LNK) &&
!(smu_link & SMU_RX_CTL_STATUS)) {
lmac->link_up = 1;
if (lmac->bgx->lmac_type == BGX_MODE_XLAUI)
if (lmac->lmac_type == BGX_MODE_XLAUI)
lmac->last_speed = 40000;
else
lmac->last_speed = 10000;
Expand Down Expand Up @@ -657,13 +657,13 @@ static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
lmac = &bgx->lmac[lmacid];
lmac->bgx = bgx;

if (bgx->lmac_type == BGX_MODE_SGMII) {
if (lmac->lmac_type == BGX_MODE_SGMII) {
lmac->is_sgmii = 1;
if (bgx_lmac_sgmii_init(bgx, lmacid))
return -1;
} else {
lmac->is_sgmii = 0;
if (bgx_lmac_xaui_init(bgx, lmacid, bgx->lmac_type))
if (bgx_lmac_xaui_init(bgx, lmac))
return -1;
}

Expand All @@ -685,10 +685,10 @@ static int bgx_lmac_enable(struct bgx *bgx, u8 lmacid)
/* Restore default cfg, incase low level firmware changed it */
bgx_reg_write(bgx, lmacid, BGX_CMRX_RX_DMAC_CTL, 0x03);

if ((bgx->lmac_type != BGX_MODE_XFI) &&
(bgx->lmac_type != BGX_MODE_XLAUI) &&
(bgx->lmac_type != BGX_MODE_40G_KR) &&
(bgx->lmac_type != BGX_MODE_10G_KR)) {
if ((lmac->lmac_type != BGX_MODE_XFI) &&
(lmac->lmac_type != BGX_MODE_XLAUI) &&
(lmac->lmac_type != BGX_MODE_40G_KR) &&
(lmac->lmac_type != BGX_MODE_10G_KR)) {
if (!lmac->phydev)
return -ENODEV;

Expand Down Expand Up @@ -753,94 +753,29 @@ static void bgx_lmac_disable(struct bgx *bgx, u8 lmacid)

bgx_flush_dmac_addrs(bgx, lmacid);

if ((bgx->lmac_type != BGX_MODE_XFI) &&
(bgx->lmac_type != BGX_MODE_XLAUI) &&
(bgx->lmac_type != BGX_MODE_40G_KR) &&
(bgx->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)
if ((lmac->lmac_type != BGX_MODE_XFI) &&
(lmac->lmac_type != BGX_MODE_XLAUI) &&
(lmac->lmac_type != BGX_MODE_40G_KR) &&
(lmac->lmac_type != BGX_MODE_10G_KR) && lmac->phydev)
phy_disconnect(lmac->phydev);

lmac->phydev = NULL;
}

static void bgx_set_num_ports(struct bgx *bgx)
{
u64 lmac_count;

switch (bgx->qlm_mode) {
case QLM_MODE_SGMII:
bgx->lmac_count = 4;
bgx->lmac_type = BGX_MODE_SGMII;
bgx->lane_to_sds = 0;
break;
case QLM_MODE_XAUI_1X4:
bgx->lmac_count = 1;
bgx->lmac_type = BGX_MODE_XAUI;
bgx->lane_to_sds = 0xE4;
break;
case QLM_MODE_RXAUI_2X2:
bgx->lmac_count = 2;
bgx->lmac_type = BGX_MODE_RXAUI;
bgx->lane_to_sds = 0xE4;
break;
case QLM_MODE_XFI_4X1:
bgx->lmac_count = 4;
bgx->lmac_type = BGX_MODE_XFI;
bgx->lane_to_sds = 0;
break;
case QLM_MODE_XLAUI_1X4:
bgx->lmac_count = 1;
bgx->lmac_type = BGX_MODE_XLAUI;
bgx->lane_to_sds = 0xE4;
break;
case QLM_MODE_10G_KR_4X1:
bgx->lmac_count = 4;
bgx->lmac_type = BGX_MODE_10G_KR;
bgx->lane_to_sds = 0;
bgx->use_training = 1;
break;
case QLM_MODE_40G_KR4_1X4:
bgx->lmac_count = 1;
bgx->lmac_type = BGX_MODE_40G_KR;
bgx->lane_to_sds = 0xE4;
bgx->use_training = 1;
break;
default:
bgx->lmac_count = 0;
break;
}

/* Check if low level firmware has programmed LMAC count
* based on board type, if yes consider that otherwise
* the default static values
*/
lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7;
if (lmac_count != 4)
bgx->lmac_count = lmac_count;
}

static void bgx_init_hw(struct bgx *bgx)
{
int i;

bgx_set_num_ports(bgx);
struct lmac *lmac;

bgx_reg_modify(bgx, 0, BGX_CMR_GLOBAL_CFG, CMR_GLOBAL_CFG_FCS_STRIP);
if (bgx_reg_read(bgx, 0, BGX_CMR_BIST_STATUS))
dev_err(&bgx->pdev->dev, "BGX%d BIST failed\n", bgx->bgx_id);

/* Set lmac type and lane2serdes mapping */
for (i = 0; i < bgx->lmac_count; i++) {
if (bgx->lmac_type == BGX_MODE_RXAUI) {
if (i)
bgx->lane_to_sds = 0x0e;
else
bgx->lane_to_sds = 0x04;
bgx_reg_write(bgx, i, BGX_CMRX_CFG,
(bgx->lmac_type << 8) | bgx->lane_to_sds);
continue;
}
lmac = &bgx->lmac[i];
bgx_reg_write(bgx, i, BGX_CMRX_CFG,
(bgx->lmac_type << 8) | (bgx->lane_to_sds + i));
(lmac->lmac_type << 8) | lmac->lane_to_sds);
bgx->lmac[i].lmacid_bd = lmac_count;
lmac_count++;
}
Expand All @@ -863,58 +798,95 @@ static void bgx_init_hw(struct bgx *bgx)
bgx_reg_write(bgx, 0, BGX_CMR_RX_STREERING + (i * 8), 0x00);
}

static void bgx_get_qlm_mode(struct bgx *bgx)
static void bgx_print_qlm_mode(struct bgx *bgx, u8 lmacid)
{
struct device *dev = &bgx->pdev->dev;
int lmac_type;
int train_en;

/* Read LMAC0 type to figure out QLM mode
* This is configured by low level firmware
*/
lmac_type = bgx_reg_read(bgx, 0, BGX_CMRX_CFG);
lmac_type = (lmac_type >> 8) & 0x07;
struct lmac *lmac;
char str[20];

train_en = bgx_reg_read(bgx, 0, BGX_SPUX_BR_PMD_CRTL) &
SPU_PMD_CRTL_TRAIN_EN;
lmac = &bgx->lmac[lmacid];
sprintf(str, "BGX%d QLM mode", bgx->bgx_id);

switch (lmac_type) {
switch (lmac->lmac_type) {
case BGX_MODE_SGMII:
bgx->qlm_mode = QLM_MODE_SGMII;
dev_info(dev, "BGX%d QLM mode: SGMII\n", bgx->bgx_id);
dev_info(dev, "%s: SGMII\n", (char *)str);
break;
case BGX_MODE_XAUI:
bgx->qlm_mode = QLM_MODE_XAUI_1X4;
dev_info(dev, "BGX%d QLM mode: XAUI\n", bgx->bgx_id);
dev_info(dev, "%s: XAUI\n", (char *)str);
break;
case BGX_MODE_RXAUI:
bgx->qlm_mode = QLM_MODE_RXAUI_2X2;
dev_info(dev, "BGX%d QLM mode: RXAUI\n", bgx->bgx_id);
dev_info(dev, "%s: RXAUI\n", (char *)str);
break;
case BGX_MODE_XFI:
if (!train_en) {
bgx->qlm_mode = QLM_MODE_XFI_4X1;
dev_info(dev, "BGX%d QLM mode: XFI\n", bgx->bgx_id);
} else {
bgx->qlm_mode = QLM_MODE_10G_KR_4X1;
dev_info(dev, "BGX%d QLM mode: 10G_KR\n", bgx->bgx_id);
}
if (!lmac->use_training)
dev_info(dev, "%s: XFI\n", (char *)str);
else
dev_info(dev, "%s: 10G_KR\n", (char *)str);
break;
case BGX_MODE_XLAUI:
if (!train_en) {
bgx->qlm_mode = QLM_MODE_XLAUI_1X4;
dev_info(dev, "BGX%d QLM mode: XLAUI\n", bgx->bgx_id);
} else {
bgx->qlm_mode = QLM_MODE_40G_KR4_1X4;
dev_info(dev, "BGX%d QLM mode: 40G_KR4\n", bgx->bgx_id);
}
if (!lmac->use_training)
dev_info(dev, "%s: XLAUI\n", (char *)str);
else
dev_info(dev, "%s: 40G_KR4\n", (char *)str);
break;
default:
bgx->qlm_mode = QLM_MODE_SGMII;
dev_info(dev, "BGX%d QLM default mode: SGMII\n", bgx->bgx_id);
dev_info(dev, "%s: INVALID\n", (char *)str);
}
}

static void lmac_set_lane2sds(struct lmac *lmac)
{
switch (lmac->lmac_type) {
case BGX_MODE_SGMII:
case BGX_MODE_XFI:
lmac->lane_to_sds = lmac->lmacid;
break;
case BGX_MODE_XAUI:
case BGX_MODE_XLAUI:
lmac->lane_to_sds = 0xE4;
break;
case BGX_MODE_RXAUI:
lmac->lane_to_sds = (lmac->lmacid) ? 0xE : 0x4;
break;
default:
lmac->lane_to_sds = 0;
break;
}
}

static void bgx_set_lmac_config(struct bgx *bgx, u8 idx)
{
struct lmac *lmac;
u64 cmr_cfg;

lmac = &bgx->lmac[idx];
lmac->lmacid = idx;

/* Read LMAC0 type to figure out QLM mode
* This is configured by low level firmware
*/
cmr_cfg = bgx_reg_read(bgx, 0, BGX_CMRX_CFG);
lmac->lmac_type = (cmr_cfg >> 8) & 0x07;
lmac->use_training =
bgx_reg_read(bgx, 0, BGX_SPUX_BR_PMD_CRTL) &
SPU_PMD_CRTL_TRAIN_EN;
lmac_set_lane2sds(lmac);
}

static void bgx_get_qlm_mode(struct bgx *bgx)
{
u8 idx;

/* It is assumed that low level firmware sets this value */
bgx->lmac_count = bgx_reg_read(bgx, 0, BGX_CMR_RX_LMACS) & 0x7;
if (bgx->lmac_count > MAX_LMAC_PER_BGX)
bgx->lmac_count = MAX_LMAC_PER_BGX;

for (idx = 0; idx < bgx->lmac_count; idx++)
bgx_set_lmac_config(bgx, idx);
bgx_print_qlm_mode(bgx, 0);
}

#ifdef CONFIG_ACPI

static int acpi_get_mac_address(struct device *dev, struct acpi_device *adev,
Expand Down
10 changes: 0 additions & 10 deletions drivers/net/ethernet/cavium/thunder/thunder_bgx.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -217,14 +217,4 @@ enum LMAC_TYPE {
BGX_MODE_40G_KR = 4,/* 4 lanes, 10.3125 Gbaud */
};

enum qlm_mode {
QLM_MODE_SGMII, /* SGMII, each lane independent */
QLM_MODE_XAUI_1X4, /* 1 XAUI or DXAUI, 4 lanes */
QLM_MODE_RXAUI_2X2, /* 2 RXAUI, 2 lanes each */
QLM_MODE_XFI_4X1, /* 4 XFI, 1 lane each */
QLM_MODE_XLAUI_1X4, /* 1 XLAUI, 4 lanes each */
QLM_MODE_10G_KR_4X1, /* 4 10GBASE-KR, 1 lane each */
QLM_MODE_40G_KR4_1X4, /* 1 40GBASE-KR4, 4 lanes each */
};

#endif /* THUNDER_BGX_H */

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