From e421e3eb7963adf20e084e0598256b6f0639da9b Mon Sep 17 00:00:00 2001 From: Ronak Doshi Date: Tue, 7 Jun 2022 20:23:48 -0700 Subject: [PATCH] vmxnet3: add support for large passthrough BAR register For vmxnet3 to work in UPT mode, the BAR sizes have been increased. The PT page has been extended to 2 pages and also includes OOB pages as a part of PT BAR. This patch enhances vmxnet3 to use appropriate BAR offsets based on the capability registered. To use new offsets, VMXNET3_CAP_LARGE_BAR needs to be set by the device. If it is not set then the device will use legacy PT page layout. Signed-off-by: Ronak Doshi Acked-by: Guolin Yang Signed-off-by: Paolo Abeni --- drivers/net/vmxnet3/vmxnet3_defs.h | 14 ++++++++++++-- drivers/net/vmxnet3/vmxnet3_drv.c | 25 ++++++++++++++++++++----- drivers/net/vmxnet3/vmxnet3_ethtool.c | 6 +++--- drivers/net/vmxnet3/vmxnet3_int.h | 3 +++ 4 files changed, 38 insertions(+), 10 deletions(-) diff --git a/drivers/net/vmxnet3/vmxnet3_defs.h b/drivers/net/vmxnet3/vmxnet3_defs.h index 0157155ff6771..8d626611ab2d5 100644 --- a/drivers/net/vmxnet3/vmxnet3_defs.h +++ b/drivers/net/vmxnet3/vmxnet3_defs.h @@ -57,8 +57,18 @@ enum { VMXNET3_REG_RXPROD2 = 0xA00 /* Rx Producer Index for ring 2 */ }; -#define VMXNET3_PT_REG_SIZE 4096 /* BAR 0 */ -#define VMXNET3_VD_REG_SIZE 4096 /* BAR 1 */ +/* For Large PT BAR, the following offset to DB register */ +enum { + VMXNET3_REG_LB_TXPROD = 0x1000, /* Tx Producer Index */ + VMXNET3_REG_LB_RXPROD = 0x1400, /* Rx Producer Index for ring 1 */ + VMXNET3_REG_LB_RXPROD2 = 0x1800, /* Rx Producer Index for ring 2 */ +}; + +#define VMXNET3_PT_REG_SIZE 4096 /* BAR 0 */ +#define VMXNET3_LARGE_PT_REG_SIZE 8192 /* large PT pages */ +#define VMXNET3_VD_REG_SIZE 4096 /* BAR 1 */ +#define VMXNET3_LARGE_BAR0_REG_SIZE (4096 * 4096) /* LARGE BAR 0 */ +#define VMXNET3_OOB_REG_SIZE (4094 * 4096) /* OOB pages */ #define VMXNET3_REG_ALIGN 8 /* All registers are 8-byte aligned. */ #define VMXNET3_REG_ALIGN_MASK 0x7 diff --git a/drivers/net/vmxnet3/vmxnet3_drv.c b/drivers/net/vmxnet3/vmxnet3_drv.c index edc4f23d4965f..93f237db463d7 100644 --- a/drivers/net/vmxnet3/vmxnet3_drv.c +++ b/drivers/net/vmxnet3/vmxnet3_drv.c @@ -1207,7 +1207,7 @@ vmxnet3_tq_xmit(struct sk_buff *skb, struct vmxnet3_tx_queue *tq, if (tx_num_deferred >= le32_to_cpu(tq->shared->txThreshold)) { tq->shared->txNumDeferred = 0; VMXNET3_WRITE_BAR0_REG(adapter, - VMXNET3_REG_TXPROD + tq->qid * 8, + adapter->tx_prod_offset + tq->qid * 8, tq->tx_ring.next2fill); } @@ -1359,8 +1359,8 @@ static int vmxnet3_rq_rx_complete(struct vmxnet3_rx_queue *rq, struct vmxnet3_adapter *adapter, int quota) { - static const u32 rxprod_reg[2] = { - VMXNET3_REG_RXPROD, VMXNET3_REG_RXPROD2 + u32 rxprod_reg[2] = { + adapter->rx_prod_offset, adapter->rx_prod2_offset }; u32 num_pkts = 0; bool skip_page_frags = false; @@ -2783,9 +2783,9 @@ vmxnet3_activate_dev(struct vmxnet3_adapter *adapter) for (i = 0; i < adapter->num_rx_queues; i++) { VMXNET3_WRITE_BAR0_REG(adapter, - VMXNET3_REG_RXPROD + i * VMXNET3_REG_ALIGN, + adapter->rx_prod_offset + i * VMXNET3_REG_ALIGN, adapter->rx_queue[i].rx_ring[0].next2fill); - VMXNET3_WRITE_BAR0_REG(adapter, (VMXNET3_REG_RXPROD2 + + VMXNET3_WRITE_BAR0_REG(adapter, (adapter->rx_prod2_offset + (i * VMXNET3_REG_ALIGN)), adapter->rx_queue[i].rx_ring[1].next2fill); } @@ -3608,6 +3608,10 @@ vmxnet3_probe_device(struct pci_dev *pdev, if (VMXNET3_VERSION_GE_7(adapter)) { adapter->devcap_supported[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_DCR); adapter->ptcap_supported[0] = VMXNET3_READ_BAR1_REG(adapter, VMXNET3_REG_PTCR); + if (adapter->devcap_supported[0] & (1UL << VMXNET3_CAP_LARGE_BAR)) { + adapter->dev_caps[0] = adapter->devcap_supported[0] & + (1UL << VMXNET3_CAP_LARGE_BAR); + } if (adapter->dev_caps[0]) VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_DCR, adapter->dev_caps[0]); @@ -3617,6 +3621,17 @@ vmxnet3_probe_device(struct pci_dev *pdev, spin_unlock_irqrestore(&adapter->cmd_lock, flags); } + if (VMXNET3_VERSION_GE_7(adapter) && + adapter->dev_caps[0] & (1UL << VMXNET3_CAP_LARGE_BAR)) { + adapter->tx_prod_offset = VMXNET3_REG_LB_TXPROD; + adapter->rx_prod_offset = VMXNET3_REG_LB_RXPROD; + adapter->rx_prod2_offset = VMXNET3_REG_LB_RXPROD2; + } else { + adapter->tx_prod_offset = VMXNET3_REG_TXPROD; + adapter->rx_prod_offset = VMXNET3_REG_RXPROD; + adapter->rx_prod2_offset = VMXNET3_REG_RXPROD2; + } + if (VMXNET3_VERSION_GE_6(adapter)) { spin_lock_irqsave(&adapter->cmd_lock, flags); VMXNET3_WRITE_BAR1_REG(adapter, VMXNET3_REG_CMD, diff --git a/drivers/net/vmxnet3/vmxnet3_ethtool.c b/drivers/net/vmxnet3/vmxnet3_ethtool.c index 458f2da1ebab7..397b268f7bc5f 100644 --- a/drivers/net/vmxnet3/vmxnet3_ethtool.c +++ b/drivers/net/vmxnet3/vmxnet3_ethtool.c @@ -520,7 +520,7 @@ vmxnet3_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p) for (i = 0; i < adapter->num_tx_queues; i++) { struct vmxnet3_tx_queue *tq = &adapter->tx_queue[i]; - buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_TXPROD + + buf[j++] = VMXNET3_READ_BAR0_REG(adapter, adapter->tx_prod_offset + i * VMXNET3_REG_ALIGN); buf[j++] = VMXNET3_GET_ADDR_LO(tq->tx_ring.basePA); @@ -548,9 +548,9 @@ vmxnet3_get_regs(struct net_device *netdev, struct ethtool_regs *regs, void *p) for (i = 0; i < adapter->num_rx_queues; i++) { struct vmxnet3_rx_queue *rq = &adapter->rx_queue[i]; - buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_RXPROD + + buf[j++] = VMXNET3_READ_BAR0_REG(adapter, adapter->rx_prod_offset + i * VMXNET3_REG_ALIGN); - buf[j++] = VMXNET3_READ_BAR0_REG(adapter, VMXNET3_REG_RXPROD2 + + buf[j++] = VMXNET3_READ_BAR0_REG(adapter, adapter->rx_prod2_offset + i * VMXNET3_REG_ALIGN); buf[j++] = VMXNET3_GET_ADDR_LO(rq->rx_ring[0].basePA); diff --git a/drivers/net/vmxnet3/vmxnet3_int.h b/drivers/net/vmxnet3/vmxnet3_int.h index a7c8f80702c2f..a4f832f0ad5bc 100644 --- a/drivers/net/vmxnet3/vmxnet3_int.h +++ b/drivers/net/vmxnet3/vmxnet3_int.h @@ -406,6 +406,9 @@ struct vmxnet3_adapter { u32 devcap_supported[8]; u32 ptcap_supported[8]; u32 dev_caps[8]; + u16 tx_prod_offset; + u16 rx_prod_offset; + u16 rx_prod2_offset; }; #define VMXNET3_WRITE_BAR0_REG(adapter, reg, val) \ -- 2.39.5