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Subject[PATCH 01/21] net: thunderx: Moved HW capability info from macros to structure
Date
From: Sunil Goutham <sgoutham@cavium.com>

Current driver has most of the HW maximums info like no of channels,
traffic limiters, RSS indices e.t.c in the form of macros. These have
been moved into a 'hw_info' structure so that support for VNIC on
newer chips with different set of HW maximums can be added.

Signed-off-by: Sunil Goutham <sgoutham@cavium.com>
---
drivers/net/ethernet/cavium/thunder/nic.h | 41 ++---------
drivers/net/ethernet/cavium/thunder/nic_main.c | 96 +++++++++++++++++++++-----
2 files changed, 85 insertions(+), 52 deletions(-)

diff --git a/drivers/net/ethernet/cavium/thunder/nic.h b/drivers/net/ethernet/cavium/thunder/nic.h
index 83025bb..66b499b 100644
--- a/drivers/net/ethernet/cavium/thunder/nic.h
+++ b/drivers/net/ethernet/cavium/thunder/nic.h
@@ -20,6 +20,9 @@
#define PCI_DEVICE_ID_THUNDER_NIC_VF 0xA034
#define PCI_DEVICE_ID_THUNDER_BGX 0xA026

+/* Subsystem device IDs */
+#define PCI_SUBSYS_DEVID_88XX_NIC_PF 0xA11E
+
/* PCI BAR nos */
#define PCI_CFG_REG_BAR_NUM 0
#define PCI_MSIX_REG_BAR_NUM 4
@@ -41,40 +44,8 @@
/* Max pkinds */
#define NIC_MAX_PKIND 16

-/* Rx Channels */
-/* Receive channel configuration in TNS bypass mode
- * Below is configuration in TNS bypass mode
- * BGX0-LMAC0-CHAN0 - VNIC CHAN0
- * BGX0-LMAC1-CHAN0 - VNIC CHAN16
- * ...
- * BGX1-LMAC0-CHAN0 - VNIC CHAN128
- * ...
- * BGX1-LMAC3-CHAN0 - VNIC CHAN174
- */
-#define NIC_INTF_COUNT 2 /* Interfaces btw VNIC and TNS/BGX */
-#define NIC_CHANS_PER_INF 128
-#define NIC_MAX_CHANS (NIC_INTF_COUNT * NIC_CHANS_PER_INF)
-#define NIC_CPI_COUNT 2048 /* No of channel parse indices */
-
-/* TNS bypass mode: 1-1 mapping between VNIC and BGX:LMAC */
-#define NIC_MAX_BGX MAX_BGX_PER_CN88XX
-#define NIC_CPI_PER_BGX (NIC_CPI_COUNT / NIC_MAX_BGX)
-#define NIC_MAX_CPI_PER_LMAC 64 /* Max when CPI_ALG is IP diffserv */
-#define NIC_RSSI_PER_BGX (NIC_RSSI_COUNT / NIC_MAX_BGX)
-
-/* Tx scheduling */
-#define NIC_MAX_TL4 1024
-#define NIC_MAX_TL4_SHAPERS 256 /* 1 shaper for 4 TL4s */
-#define NIC_MAX_TL3 256
-#define NIC_MAX_TL3_SHAPERS 64 /* 1 shaper for 4 TL3s */
-#define NIC_MAX_TL2 64
-#define NIC_MAX_TL2_SHAPERS 2 /* 1 shaper for 32 TL2s */
-#define NIC_MAX_TL1 2
-
-/* TNS bypass mode */
-#define NIC_TL2_PER_BGX 32
-#define NIC_TL4_PER_BGX (NIC_MAX_TL4 / NIC_MAX_BGX)
-#define NIC_TL4_PER_LMAC (NIC_MAX_TL4 / NIC_CHANS_PER_INF)
+/* Max when CPI_ALG is IP diffserv */
+#define NIC_MAX_CPI_PER_LMAC 64

/* NIC VF Interrupts */
#define NICVF_INTR_CQ 0
@@ -148,7 +119,6 @@ struct nicvf_cq_poll {
struct napi_struct napi;
};

-#define NIC_RSSI_COUNT 4096 /* Total no of RSS indices */
#define NIC_MAX_RSS_HASH_BITS 8
#define NIC_MAX_RSS_IDR_TBL_SIZE (1 << NIC_MAX_RSS_HASH_BITS)
#define RSS_HASH_KEY_SIZE 5 /* 320 bit key */
@@ -273,6 +243,7 @@ struct nicvf {
struct net_device *netdev;
struct pci_dev *pdev;
void __iomem *reg_base;
+#define MAX_QUEUES_PER_QSET 8
struct queue_set *qs;
struct nicvf_cq_poll *napi[8];
u8 vf_id;
diff --git a/drivers/net/ethernet/cavium/thunder/nic_main.c b/drivers/net/ethernet/cavium/thunder/nic_main.c
index 16ed203..dc845a0 100644
--- a/drivers/net/ethernet/cavium/thunder/nic_main.c
+++ b/drivers/net/ethernet/cavium/thunder/nic_main.c
@@ -20,8 +20,23 @@
#define DRV_NAME "thunder-nic"
#define DRV_VERSION "1.0"

+struct hw_info {
+ u8 bgx_cnt;
+ u8 chans_per_lmac;
+ u8 chans_per_bgx; /* Rx/Tx chans */
+ u16 cpi_cnt;
+ u16 rssi_cnt;
+ u16 rss_ind_tbl_size;
+ u16 tl4_cnt;
+ u16 tl3_cnt;
+ u8 tl2_cnt;
+ u8 tl1_cnt;
+ bool tl1_per_bgx; /* TL1 per BGX or per LMAC */
+};
+
struct nicpf {
struct pci_dev *pdev;
+ struct hw_info *hw;
u8 node;
unsigned int flags;
u8 num_vf_en; /* No of VF enabled */
@@ -44,7 +59,6 @@ struct nicpf {
u32 speed[MAX_LMAC];
u16 cpi_base[MAX_NUM_VFS_SUPPORTED];
u16 rssi_base[MAX_NUM_VFS_SUPPORTED];
- u16 rss_ind_tbl_size;
bool mbx_lock[MAX_NUM_VFS_SUPPORTED];

/* MSI-X */
@@ -275,7 +289,7 @@ static void nic_set_lmac_vf_mapping(struct nicpf *nic)

nic->num_vf_en = 0;

- for (bgx = 0; bgx < NIC_MAX_BGX; bgx++) {
+ for (bgx = 0; bgx < nic->hw->bgx_cnt; bgx++) {
if (!(bgx_map & (1 << bgx)))
continue;
lmac_cnt = bgx_get_lmac_count(nic->node, bgx);
@@ -298,6 +312,30 @@ static void nic_set_lmac_vf_mapping(struct nicpf *nic)
}
}

+static void nic_get_hw_info(struct nicpf *nic)
+{
+ u16 sdevid;
+ struct hw_info *hw = nic->hw;
+
+ pci_read_config_word(nic->pdev, PCI_SUBSYSTEM_ID, &sdevid);
+
+ switch (sdevid) {
+ case PCI_SUBSYS_DEVID_88XX_NIC_PF:
+ hw->bgx_cnt = MAX_BGX_PER_CN88XX;
+ hw->chans_per_lmac = 16;
+ hw->chans_per_bgx = 128;
+ hw->cpi_cnt = 2048;
+ hw->rssi_cnt = 4096;
+ hw->rss_ind_tbl_size = NIC_MAX_RSS_IDR_TBL_SIZE;
+ hw->tl3_cnt = 256;
+ hw->tl2_cnt = 64;
+ hw->tl1_cnt = 2;
+ hw->tl1_per_bgx = true;
+ break;
+ }
+ hw->tl4_cnt = MAX_QUEUES_PER_QSET * pci_sriov_get_totalvfs(nic->pdev);
+}
+
#define BGX0_BLOCK 8
#define BGX1_BLOCK 9

@@ -306,6 +344,9 @@ static void nic_init_hw(struct nicpf *nic)
int i;
u64 cqm_cfg;

+ /* Get HW capability info */
+ nic_get_hw_info(nic);
+
/* Enable NIC HW block */
nic_reg_write(nic, NIC_PF_CFG, 0x3);

@@ -351,6 +392,7 @@ static void nic_init_hw(struct nicpf *nic)
/* Channel parse index configuration */
static void nic_config_cpi(struct nicpf *nic, struct cpi_cfg_msg *cfg)
{
+ struct hw_info *hw = nic->hw;
u32 vnic, bgx, lmac, chan;
u32 padd, cpi_count = 0;
u64 cpi_base, cpi, rssi_base, rssi;
@@ -360,9 +402,11 @@ static void nic_config_cpi(struct nicpf *nic, struct cpi_cfg_msg *cfg)
bgx = NIC_GET_BGX_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vnic]);
lmac = NIC_GET_LMAC_FROM_VF_LMAC_MAP(nic->vf_lmac_map[vnic]);

- chan = (lmac * MAX_BGX_CHANS_PER_LMAC) + (bgx * NIC_CHANS_PER_INF);
- cpi_base = (lmac * NIC_MAX_CPI_PER_LMAC) + (bgx * NIC_CPI_PER_BGX);
- rssi_base = (lmac * nic->rss_ind_tbl_size) + (bgx * NIC_RSSI_PER_BGX);
+ chan = (lmac * hw->chans_per_lmac) + (bgx * hw->chans_per_bgx);
+ cpi_base = (lmac * NIC_MAX_CPI_PER_LMAC) +
+ (bgx * (hw->cpi_cnt / hw->bgx_cnt));
+ rssi_base = (lmac * hw->rss_ind_tbl_size) +
+ (bgx * (hw->rssi_cnt / hw->bgx_cnt));

/* Rx channel configuration */
nic_reg_write(nic, NIC_PF_CHAN_0_255_RX_BP_CFG | (chan << 3),
@@ -434,7 +478,7 @@ static void nic_send_rss_size(struct nicpf *nic, int vf)
msg = (u64 *)&mbx;

mbx.rss_size.msg = NIC_MBOX_MSG_RSS_SIZE;
- mbx.rss_size.ind_tbl_size = nic->rss_ind_tbl_size;
+ mbx.rss_size.ind_tbl_size = nic->hw->rss_ind_tbl_size;
nic_send_msg_to_vf(nic, vf, &mbx);
}

@@ -494,6 +538,7 @@ static void nic_config_rss(struct nicpf *nic, struct rss_cfg_msg *cfg)
static void nic_tx_channel_cfg(struct nicpf *nic, u8 vnic,
struct sq_cfg_msg *sq)
{
+ struct hw_info *hw = nic->hw;
u32 bgx, lmac, chan;
u32 tl2, tl3, tl4;
u32 rr_quantum;
@@ -512,21 +557,24 @@ static void nic_tx_channel_cfg(struct nicpf *nic, u8 vnic,
/* 24 bytes for FCS, IPG and preamble */
rr_quantum = ((NIC_HW_MAX_FRS + 24) / 4);

+ /* For 88xx 0-511 TL4 transmits via BGX0 and
+ * 512-1023 TL4s transmit via BGX1.
+ */
+ tl4 = bgx * (hw->tl4_cnt / hw->bgx_cnt);
if (!sq->sqs_mode) {
- tl4 = (lmac * NIC_TL4_PER_LMAC) + (bgx * NIC_TL4_PER_BGX);
+ tl4 += (lmac * MAX_QUEUES_PER_QSET);
} else {
for (svf = 0; svf < MAX_SQS_PER_VF; svf++) {
if (nic->vf_sqs[pqs_vnic][svf] == vnic)
break;
}
- tl4 = (MAX_LMAC_PER_BGX * NIC_TL4_PER_LMAC);
- tl4 += (lmac * NIC_TL4_PER_LMAC * MAX_SQS_PER_VF);
- tl4 += (svf * NIC_TL4_PER_LMAC);
- tl4 += (bgx * NIC_TL4_PER_BGX);
+ tl4 += (MAX_LMAC_PER_BGX * MAX_QUEUES_PER_QSET);
+ tl4 += (lmac * MAX_QUEUES_PER_QSET * MAX_SQS_PER_VF);
+ tl4 += (svf * MAX_QUEUES_PER_QSET);
}
tl4 += sq_idx;

- tl3 = tl4 / (NIC_MAX_TL4 / NIC_MAX_TL3);
+ tl3 = tl4 / (hw->tl4_cnt / hw->tl3_cnt);
nic_reg_write(nic, NIC_PF_QSET_0_127_SQ_0_7_CFG2 |
((u64)vnic << NIC_QS_ID_SHIFT) |
((u32)sq_idx << NIC_Q_NUM_SHIFT), tl4);
@@ -534,8 +582,13 @@ static void nic_tx_channel_cfg(struct nicpf *nic, u8 vnic,
((u64)vnic << 27) | ((u32)sq_idx << 24) | rr_quantum);

nic_reg_write(nic, NIC_PF_TL3_0_255_CFG | (tl3 << 3), rr_quantum);
- chan = (lmac * MAX_BGX_CHANS_PER_LMAC) + (bgx * NIC_CHANS_PER_INF);
+
+ /* On 88xx 0-127 channels are for BGX0 and
+ * 127-255 channels for BGX1.
+ */
+ chan = (lmac * hw->chans_per_lmac) + (bgx * hw->chans_per_bgx);
nic_reg_write(nic, NIC_PF_TL3_0_255_CHAN | (tl3 << 3), chan);
+
/* Enable backpressure on the channel */
nic_reg_write(nic, NIC_PF_CHAN_0_255_TX_CFG | (chan << 3), 1);

@@ -1008,6 +1061,12 @@ static int nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
if (!nic)
return -ENOMEM;

+ nic->hw = devm_kzalloc(dev, sizeof(struct hw_info), GFP_KERNEL);
+ if (!nic->hw) {
+ devm_kfree(dev, nic);
+ return -ENOMEM;
+ }
+
pci_set_drvdata(pdev, nic);

nic->pdev = pdev;
@@ -1047,13 +1106,10 @@ static int nic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

nic->node = nic_get_node_id(pdev);

- nic_set_lmac_vf_mapping(nic);
-
/* Initialize hardware */
nic_init_hw(nic);

- /* Set RSS TBL size for each VF */
- nic->rss_ind_tbl_size = NIC_MAX_RSS_IDR_TBL_SIZE;
+ nic_set_lmac_vf_mapping(nic);

/* Register interrupts */
err = nic_register_interrupts(nic);
@@ -1086,6 +1142,8 @@ err_unregister_interrupts:
err_release_regions:
pci_release_regions(pdev);
err_disable_device:
+ devm_kfree(dev, nic->hw);
+ devm_kfree(dev, nic);
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
return err;
@@ -1106,6 +1164,10 @@ static void nic_remove(struct pci_dev *pdev)

nic_unregister_interrupts(nic);
pci_release_regions(pdev);
+
+ devm_kfree(&pdev->dev, nic->hw);
+ devm_kfree(&pdev->dev, nic);
+
pci_disable_device(pdev);
pci_set_drvdata(pdev, NULL);
}
--
2.7.4
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