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Message-Id: <1468231317-24023-9-git-send-email-sunil.kovvuri@gmail.com>
Date: Mon, 11 Jul 2016 15:31:50 +0530
From: sunil.kovvuri@...il.com
To: linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc: Sunil Goutham <sgoutham@...ium.com>
Subject: [PATCH 08/15] net: thunderx: Add 81xx support to BGX driver
From: Sunil Goutham <sgoutham@...ium.com>
This patch adds support for BGX module on 81xx where a BGX
can be split and have different LMACs configured in
different modes.
Signed-off-by: Sunil Goutham <sgoutham@...ium.com>
---
drivers/net/ethernet/cavium/thunder/thunder_bgx.c | 112 ++++++++++++++++++++--
drivers/net/ethernet/cavium/thunder/thunder_bgx.h | 11 +++
2 files changed, 113 insertions(+), 10 deletions(-)
diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
index 4497427..9c3c273 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.c
@@ -50,6 +50,7 @@ struct bgx {
int lmac_count;
void __iomem *reg_base;
struct pci_dev *pdev;
+ bool is_81xx;
};
static struct bgx *bgx_vnic[MAX_BGX_THUNDER];
@@ -803,9 +804,17 @@ static void bgx_print_qlm_mode(struct bgx *bgx, u8 lmacid)
struct device *dev = &bgx->pdev->dev;
struct lmac *lmac;
char str[20];
+ u8 dlm;
+
+ if (lmacid > MAX_LMAC_PER_BGX)
+ return;
lmac = &bgx->lmac[lmacid];
- sprintf(str, "BGX%d QLM mode", bgx->bgx_id);
+ dlm = (lmacid / 2) + (bgx->bgx_id * 2);
+ if (!bgx->is_81xx)
+ sprintf(str, "BGX%d QLM mode", bgx->bgx_id);
+ else
+ sprintf(str, "BGX%d DLM%d mode", bgx->bgx_id, dlm);
switch (lmac->lmac_type) {
case BGX_MODE_SGMII:
@@ -857,26 +866,81 @@ static void lmac_set_lane2sds(struct lmac *lmac)
static void bgx_set_lmac_config(struct bgx *bgx, u8 idx)
{
struct lmac *lmac;
+ struct lmac *olmac;
u64 cmr_cfg;
+ u8 lmac_type;
+ u8 lane_to_sds;
lmac = &bgx->lmac[idx];
- lmac->lmacid = idx;
- /* Read LMAC0 type to figure out QLM mode
- * This is configured by low level firmware
+ if (!bgx->is_81xx) {
+ /* 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);
+ return;
+ }
+
+ /* On 81xx BGX can be split across 2 DLMs
+ * firmware programs lmac_type of LMAC0 and LMAC2
*/
- 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) &
+ if ((idx == 0) || (idx == 2)) {
+ cmr_cfg = bgx_reg_read(bgx, idx, BGX_CMRX_CFG);
+ lmac_type = (u8)((cmr_cfg >> 8) & 0x07);
+ lane_to_sds = (u8)(cmr_cfg & 0xFF);
+ /* Check if config is not reset value */
+ if ((lmac_type == 0) && (lane_to_sds == 0xE4))
+ lmac->lmac_type = BGX_MODE_INVALID;
+ else
+ lmac->lmac_type = lmac_type;
+ lmac->use_training =
+ bgx_reg_read(bgx, idx, BGX_SPUX_BR_PMD_CRTL) &
+ SPU_PMD_CRTL_TRAIN_EN;
+ lmac_set_lane2sds(lmac);
+
+ /* Set LMAC type of other lmac on same DLM i.e LMAC 1/3 */
+ olmac = &bgx->lmac[idx + 1];
+ olmac->lmac_type = lmac->lmac_type;
+ olmac->use_training =
+ bgx_reg_read(bgx, idx + 1, BGX_SPUX_BR_PMD_CRTL) &
SPU_PMD_CRTL_TRAIN_EN;
- lmac_set_lane2sds(lmac);
+ lmac_set_lane2sds(olmac);
+ }
+}
+
+static bool is_dlm0_in_bgx_mode(struct bgx *bgx)
+{
+ struct lmac *lmac;
+
+ if (!bgx->is_81xx)
+ return true;
+
+ lmac = &bgx->lmac[1];
+ if (lmac->lmac_type == BGX_MODE_INVALID)
+ return false;
+
+ return true;
}
static void bgx_get_qlm_mode(struct bgx *bgx)
{
+ struct lmac *lmac;
+ struct lmac *lmac01;
+ struct lmac *lmac23;
u8 idx;
+ /* Init all LMAC's type to invalid */
+ for (idx = 0; idx < MAX_LMAC_PER_BGX; idx++) {
+ lmac = &bgx->lmac[idx];
+ lmac->lmac_type = BGX_MODE_INVALID;
+ lmac->lmacid = 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)
@@ -884,7 +948,28 @@ static void bgx_get_qlm_mode(struct bgx *bgx)
for (idx = 0; idx < bgx->lmac_count; idx++)
bgx_set_lmac_config(bgx, idx);
- bgx_print_qlm_mode(bgx, 0);
+
+ if (!bgx->is_81xx) {
+ bgx_print_qlm_mode(bgx, 0);
+ return;
+ }
+
+ if (bgx->lmac_count) {
+ bgx_print_qlm_mode(bgx, 0);
+ bgx_print_qlm_mode(bgx, 2);
+ }
+
+ /* If DLM0 is not in BGX mode then LMAC0/1 have
+ * to be configured with serdes lanes of DLM1
+ */
+ if (is_dlm0_in_bgx_mode(bgx) || (bgx->lmac_count > 2))
+ return;
+ for (idx = 0; idx < bgx->lmac_count; idx++) {
+ lmac01 = &bgx->lmac[idx];
+ lmac23 = &bgx->lmac[idx + 2];
+ lmac01->lmac_type = lmac23->lmac_type;
+ lmac01->lane_to_sds = lmac23->lane_to_sds;
+ }
}
#ifdef CONFIG_ACPI
@@ -1059,6 +1144,7 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
struct device *dev = &pdev->dev;
struct bgx *bgx = NULL;
u8 lmac;
+ u16 sdevid;
bgx = devm_kzalloc(dev, sizeof(*bgx), GFP_KERNEL);
if (!bgx)
@@ -1080,6 +1166,10 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
goto err_disable_device;
}
+ pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &sdevid);
+ if (sdevid == PCI_SUBSYS_DEVID_81XX_BGX)
+ bgx->is_81xx = true;
+
/* MAP configuration registers */
bgx->reg_base = pcim_iomap(pdev, PCI_CFG_REG_BAR_NUM, 0);
if (!bgx->reg_base) {
@@ -1105,6 +1195,8 @@ static int bgx_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (err) {
dev_err(dev, "BGX%d failed to enable lmac%d\n",
bgx->bgx_id, lmac);
+ while (lmac)
+ bgx_lmac_disable(bgx, --lmac);
goto err_enable;
}
}
diff --git a/drivers/net/ethernet/cavium/thunder/thunder_bgx.h b/drivers/net/ethernet/cavium/thunder/thunder_bgx.h
index b7b91c8..38e9fb4 100644
--- a/drivers/net/ethernet/cavium/thunder/thunder_bgx.h
+++ b/drivers/net/ethernet/cavium/thunder/thunder_bgx.h
@@ -9,6 +9,14 @@
#ifndef THUNDER_BGX_H
#define THUNDER_BGX_H
+/* PCI device ID */
+#define PCI_DEVICE_ID_THUNDER_BGX 0xA026
+
+/* Subsystem device IDs */
+#define PCI_SUBSYS_DEVID_88XX_BGX 0xA126
+#define PCI_SUBSYS_DEVID_81XX_BGX 0xA226
+#define PCI_SUBSYS_DEVID_83XX_BGX 0xA326
+
#define MAX_BGX_THUNDER 8 /* Max 4 nodes, 2 per node */
#define MAX_BGX_PER_CN88XX 2
#define MAX_BGX_PER_CN81XX 2
@@ -215,6 +223,9 @@ enum LMAC_TYPE {
BGX_MODE_XLAUI = 4, /* 4 lanes, 10.3125 Gbaud */
BGX_MODE_10G_KR = 3,/* 1 lane, 10.3125 Gbaud */
BGX_MODE_40G_KR = 4,/* 4 lanes, 10.3125 Gbaud */
+ BGX_MODE_RGMII = 5,
+ BGX_MODE_QSGMII = 6,
+ BGX_MODE_INVALID = 7,
};
#endif /* THUNDER_BGX_H */
--
2.7.4
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