1 files changed, 475 insertions, 0 deletions
diff --git a/drivers/net/ethernet/wangxun/libwx/wx_hw.c b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
new file mode 100644
index 000000000000..8dbbac862f27
--- /dev/null
+++ b/drivers/net/ethernet/wangxun/libwx/wx_hw.c
@@ -0,0 +1,475 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2015 - 2022 Beijing WangXun Technology Co., Ltd. */
+
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
+#include <linux/iopoll.h>
+#include <linux/pci.h>
+
+#include "wx_type.h"
+#include "wx_hw.h"
+
+static void wx_intr_disable(struct wx_hw *wxhw, u64 qmask)
+{
+	u32 mask;
+
+	mask = (qmask & 0xFFFFFFFF);
+	if (mask)
+		wr32(wxhw, WX_PX_IMS(0), mask);
+
+	if (wxhw->mac.type == wx_mac_sp) {
+		mask = (qmask >> 32);
+		if (mask)
+			wr32(wxhw, WX_PX_IMS(1), mask);
+	}
+}
+
+/* cmd_addr is used for some special command:
+ * 1. to be sector address, when implemented erase sector command
+ * 2. to be flash address when implemented read, write flash address
+ */
+static int wx_fmgr_cmd_op(struct wx_hw *wxhw, u32 cmd, u32 cmd_addr)
+{
+	u32 cmd_val = 0, val = 0;
+
+	cmd_val = WX_SPI_CMD_CMD(cmd) |
+		  WX_SPI_CMD_CLK(WX_SPI_CLK_DIV) |
+		  cmd_addr;
+	wr32(wxhw, WX_SPI_CMD, cmd_val);
+
+	return read_poll_timeout(rd32, val, (val & 0x1), 10, 100000,
+				 false, wxhw, WX_SPI_STATUS);
+}
+
+static int wx_flash_read_dword(struct wx_hw *wxhw, u32 addr, u32 *data)
+{
+	int ret = 0;
+
+	ret = wx_fmgr_cmd_op(wxhw, WX_SPI_CMD_READ_DWORD, addr);
+	if (ret < 0)
+		return ret;
+
+	*data = rd32(wxhw, WX_SPI_DATA);
+
+	return ret;
+}
+
+int wx_check_flash_load(struct wx_hw *hw, u32 check_bit)
+{
+	u32 reg = 0;
+	int err = 0;
+
+	/* if there's flash existing */
+	if (!(rd32(hw, WX_SPI_STATUS) &
+	      WX_SPI_STATUS_FLASH_BYPASS)) {
+		/* wait hw load flash done */
+		err = read_poll_timeout(rd32, reg, !(reg & check_bit), 20000, 2000000,
+					false, hw, WX_SPI_ILDR_STATUS);
+		if (err < 0)
+			wx_err(hw, "Check flash load timeout.\n");
+	}
+
+	return err;
+}
+EXPORT_SYMBOL(wx_check_flash_load);
+
+/**
+ *  wx_get_mac_addr - Generic get MAC address
+ *  @wxhw: pointer to hardware structure
+ *  @mac_addr: Adapter MAC address
+ *
+ *  Reads the adapter's MAC address from first Receive Address Register (RAR0)
+ *  A reset of the adapter must be performed prior to calling this function
+ *  in order for the MAC address to have been loaded from the EEPROM into RAR0
+ **/
+void wx_get_mac_addr(struct wx_hw *wxhw, u8 *mac_addr)
+{
+	u32 rar_high;
+	u32 rar_low;
+	u16 i;
+
+	wr32(wxhw, WX_PSR_MAC_SWC_IDX, 0);
+	rar_high = rd32(wxhw, WX_PSR_MAC_SWC_AD_H);
+	rar_low = rd32(wxhw, WX_PSR_MAC_SWC_AD_L);
+
+	for (i = 0; i < 2; i++)
+		mac_addr[i] = (u8)(rar_high >> (1 - i) * 8);
+
+	for (i = 0; i < 4; i++)
+		mac_addr[i + 2] = (u8)(rar_low >> (3 - i) * 8);
+}
+EXPORT_SYMBOL(wx_get_mac_addr);
+
+/**
+ *  wx_set_rar - Set Rx address register
+ *  @wxhw: pointer to hardware structure
+ *  @index: Receive address register to write
+ *  @addr: Address to put into receive address register
+ *  @pools: VMDq "set" or "pool" index
+ *  @enable_addr: set flag that address is active
+ *
+ *  Puts an ethernet address into a receive address register.
+ **/
+int wx_set_rar(struct wx_hw *wxhw, u32 index, u8 *addr, u64 pools,
+	       u32 enable_addr)
+{
+	u32 rar_entries = wxhw->mac.num_rar_entries;
+	u32 rar_low, rar_high;
+
+	/* Make sure we are using a valid rar index range */
+	if (index >= rar_entries) {
+		wx_err(wxhw, "RAR index %d is out of range.\n", index);
+		return -EINVAL;
+	}
+
+	/* select the MAC address */
+	wr32(wxhw, WX_PSR_MAC_SWC_IDX, index);
+
+	/* setup VMDq pool mapping */
+	wr32(wxhw, WX_PSR_MAC_SWC_VM_L, pools & 0xFFFFFFFF);
+	if (wxhw->mac.type == wx_mac_sp)
+		wr32(wxhw, WX_PSR_MAC_SWC_VM_H, pools >> 32);
+
+	/* HW expects these in little endian so we reverse the byte
+	 * order from network order (big endian) to little endian
+	 *
+	 * Some parts put the VMDq setting in the extra RAH bits,
+	 * so save everything except the lower 16 bits that hold part
+	 * of the address and the address valid bit.
+	 */
+	rar_low = ((u32)addr[5] |
+		  ((u32)addr[4] << 8) |
+		  ((u32)addr[3] << 16) |
+		  ((u32)addr[2] << 24));
+	rar_high = ((u32)addr[1] |
+		   ((u32)addr[0] << 8));
+	if (enable_addr != 0)
+		rar_high |= WX_PSR_MAC_SWC_AD_H_AV;
+
+	wr32(wxhw, WX_PSR_MAC_SWC_AD_L, rar_low);
+	wr32m(wxhw, WX_PSR_MAC_SWC_AD_H,
+	      (WX_PSR_MAC_SWC_AD_H_AD(~0) |
+	       WX_PSR_MAC_SWC_AD_H_ADTYPE(~0) |
+	       WX_PSR_MAC_SWC_AD_H_AV),
+	      rar_high);
+
+	return 0;
+}
+EXPORT_SYMBOL(wx_set_rar);
+
+/**
+ *  wx_clear_rar - Remove Rx address register
+ *  @wxhw: pointer to hardware structure
+ *  @index: Receive address register to write
+ *
+ *  Clears an ethernet address from a receive address register.
+ **/
+int wx_clear_rar(struct wx_hw *wxhw, u32 index)
+{
+	u32 rar_entries = wxhw->mac.num_rar_entries;
+
+	/* Make sure we are using a valid rar index range */
+	if (index >= rar_entries) {
+		wx_err(wxhw, "RAR index %d is out of range.\n", index);
+		return -EINVAL;
+	}
+
+	/* Some parts put the VMDq setting in the extra RAH bits,
+	 * so save everything except the lower 16 bits that hold part
+	 * of the address and the address valid bit.
+	 */
+	wr32(wxhw, WX_PSR_MAC_SWC_IDX, index);
+
+	wr32(wxhw, WX_PSR_MAC_SWC_VM_L, 0);
+	wr32(wxhw, WX_PSR_MAC_SWC_VM_H, 0);
+
+	wr32(wxhw, WX_PSR_MAC_SWC_AD_L, 0);
+	wr32m(wxhw, WX_PSR_MAC_SWC_AD_H,
+	      (WX_PSR_MAC_SWC_AD_H_AD(~0) |
+	       WX_PSR_MAC_SWC_AD_H_ADTYPE(~0) |
+	       WX_PSR_MAC_SWC_AD_H_AV),
+	      0);
+
+	return 0;
+}
+EXPORT_SYMBOL(wx_clear_rar);
+
+/**
+ *  wx_clear_vmdq - Disassociate a VMDq pool index from a rx address
+ *  @wxhw: pointer to hardware struct
+ *  @rar: receive address register index to disassociate
+ *  @vmdq: VMDq pool index to remove from the rar
+ **/
+static int wx_clear_vmdq(struct wx_hw *wxhw, u32 rar, u32 __maybe_unused vmdq)
+{
+	u32 rar_entries = wxhw->mac.num_rar_entries;
+	u32 mpsar_lo, mpsar_hi;
+
+	/* Make sure we are using a valid rar index range */
+	if (rar >= rar_entries) {
+		wx_err(wxhw, "RAR index %d is out of range.\n", rar);
+		return -EINVAL;
+	}
+
+	wr32(wxhw, WX_PSR_MAC_SWC_IDX, rar);
+	mpsar_lo = rd32(wxhw, WX_PSR_MAC_SWC_VM_L);
+	mpsar_hi = rd32(wxhw, WX_PSR_MAC_SWC_VM_H);
+
+	if (!mpsar_lo && !mpsar_hi)
+		return 0;
+
+	/* was that the last pool using this rar? */
+	if (mpsar_lo == 0 && mpsar_hi == 0 && rar != 0)
+		wx_clear_rar(wxhw, rar);
+
+	return 0;
+}
+
+/**
+ *  wx_init_uta_tables - Initialize the Unicast Table Array
+ *  @wxhw: pointer to hardware structure
+ **/
+static void wx_init_uta_tables(struct wx_hw *wxhw)
+{
+	int i;
+
+	wx_dbg(wxhw, " Clearing UTA\n");
+
+	for (i = 0; i < 128; i++)
+		wr32(wxhw, WX_PSR_UC_TBL(i), 0);
+}
+
+/**
+ *  wx_init_rx_addrs - Initializes receive address filters.
+ *  @wxhw: pointer to hardware structure
+ *
+ *  Places the MAC address in receive address register 0 and clears the rest
+ *  of the receive address registers. Clears the multicast table. Assumes
+ *  the receiver is in reset when the routine is called.
+ **/
+void wx_init_rx_addrs(struct wx_hw *wxhw)
+{
+	u32 rar_entries = wxhw->mac.num_rar_entries;
+	u32 psrctl;
+	int i;
+
+	/* If the current mac address is valid, assume it is a software override
+	 * to the permanent address.
+	 * Otherwise, use the permanent address from the eeprom.
+	 */
+	if (!is_valid_ether_addr(wxhw->mac.addr)) {
+		/* Get the MAC address from the RAR0 for later reference */
+		wx_get_mac_addr(wxhw, wxhw->mac.addr);
+		wx_dbg(wxhw, "Keeping Current RAR0 Addr = %pM\n", wxhw->mac.addr);
+	} else {
+		/* Setup the receive address. */
+		wx_dbg(wxhw, "Overriding MAC Address in RAR[0]\n");
+		wx_dbg(wxhw, "New MAC Addr = %pM\n", wxhw->mac.addr);
+
+		wx_set_rar(wxhw, 0, wxhw->mac.addr, 0, WX_PSR_MAC_SWC_AD_H_AV);
+
+		if (wxhw->mac.type == wx_mac_sp) {
+			/* clear VMDq pool/queue selection for RAR 0 */
+			wx_clear_vmdq(wxhw, 0, WX_CLEAR_VMDQ_ALL);
+		}
+	}
+
+	/* Zero out the other receive addresses. */
+	wx_dbg(wxhw, "Clearing RAR[1-%d]\n", rar_entries - 1);
+	for (i = 1; i < rar_entries; i++) {
+		wr32(wxhw, WX_PSR_MAC_SWC_IDX, i);
+		wr32(wxhw, WX_PSR_MAC_SWC_AD_L, 0);
+		wr32(wxhw, WX_PSR_MAC_SWC_AD_H, 0);
+	}
+
+	/* Clear the MTA */
+	wxhw->addr_ctrl.mta_in_use = 0;
+	psrctl = rd32(wxhw, WX_PSR_CTL);
+	psrctl &= ~(WX_PSR_CTL_MO | WX_PSR_CTL_MFE);
+	psrctl |= wxhw->mac.mc_filter_type << WX_PSR_CTL_MO_SHIFT;
+	wr32(wxhw, WX_PSR_CTL, psrctl);
+	wx_dbg(wxhw, " Clearing MTA\n");
+	for (i = 0; i < wxhw->mac.mcft_size; i++)
+		wr32(wxhw, WX_PSR_MC_TBL(i), 0);
+
+	wx_init_uta_tables(wxhw);
+}
+EXPORT_SYMBOL(wx_init_rx_addrs);
+
+void wx_disable_rx(struct wx_hw *wxhw)
+{
+	u32 pfdtxgswc;
+	u32 rxctrl;
+
+	rxctrl = rd32(wxhw, WX_RDB_PB_CTL);
+	if (rxctrl & WX_RDB_PB_CTL_RXEN) {
+		pfdtxgswc = rd32(wxhw, WX_PSR_CTL);
+		if (pfdtxgswc & WX_PSR_CTL_SW_EN) {
+			pfdtxgswc &= ~WX_PSR_CTL_SW_EN;
+			wr32(wxhw, WX_PSR_CTL, pfdtxgswc);
+			wxhw->mac.set_lben = true;
+		} else {
+			wxhw->mac.set_lben = false;
+		}
+		rxctrl &= ~WX_RDB_PB_CTL_RXEN;
+		wr32(wxhw, WX_RDB_PB_CTL, rxctrl);
+
+		if (!(((wxhw->subsystem_device_id & WX_NCSI_MASK) == WX_NCSI_SUP) ||
+		      ((wxhw->subsystem_device_id & WX_WOL_MASK) == WX_WOL_SUP))) {
+			/* disable mac receiver */
+			wr32m(wxhw, WX_MAC_RX_CFG,
+			      WX_MAC_RX_CFG_RE, 0);
+		}
+	}
+}
+EXPORT_SYMBOL(wx_disable_rx);
+
+/**
+ *  wx_disable_pcie_master - Disable PCI-express master access
+ *  @wxhw: pointer to hardware structure
+ *
+ *  Disables PCI-Express master access and verifies there are no pending
+ *  requests.
+ **/
+int wx_disable_pcie_master(struct wx_hw *wxhw)
+{
+	int status = 0;
+	u32 val;
+
+	/* Always set this bit to ensure any future transactions are blocked */
+	pci_clear_master(wxhw->pdev);
+
+	/* Exit if master requests are blocked */
+	if (!(rd32(wxhw, WX_PX_TRANSACTION_PENDING)))
+		return 0;
+
+	/* Poll for master request bit to clear */
+	status = read_poll_timeout(rd32, val, !val, 100, WX_PCI_MASTER_DISABLE_TIMEOUT,
+				   false, wxhw, WX_PX_TRANSACTION_PENDING);
+	if (status < 0)
+		wx_err(wxhw, "PCIe transaction pending bit did not clear.\n");
+
+	return status;
+}
+EXPORT_SYMBOL(wx_disable_pcie_master);
+
+/**
+ *  wx_stop_adapter - Generic stop Tx/Rx units
+ *  @wxhw: pointer to hardware structure
+ *
+ *  Sets the adapter_stopped flag within wx_hw struct. Clears interrupts,
+ *  disables transmit and receive units. The adapter_stopped flag is used by
+ *  the shared code and drivers to determine if the adapter is in a stopped
+ *  state and should not touch the hardware.
+ **/
+int wx_stop_adapter(struct wx_hw *wxhw)
+{
+	u16 i;
+
+	/* Set the adapter_stopped flag so other driver functions stop touching
+	 * the hardware
+	 */
+	wxhw->adapter_stopped = true;
+
+	/* Disable the receive unit */
+	wx_disable_rx(wxhw);
+
+	/* Set interrupt mask to stop interrupts from being generated */
+	wx_intr_disable(wxhw, WX_INTR_ALL);
+
+	/* Clear any pending interrupts, flush previous writes */
+	wr32(wxhw, WX_PX_MISC_IC, 0xffffffff);
+	wr32(wxhw, WX_BME_CTL, 0x3);
+
+	/* Disable the transmit unit.  Each queue must be disabled. */
+	for (i = 0; i < wxhw->mac.max_tx_queues; i++) {
+		wr32m(wxhw, WX_PX_TR_CFG(i),
+		      WX_PX_TR_CFG_SWFLSH | WX_PX_TR_CFG_ENABLE,
+		      WX_PX_TR_CFG_SWFLSH);
+	}
+
+	/* Disable the receive unit by stopping each queue */
+	for (i = 0; i < wxhw->mac.max_rx_queues; i++) {
+		wr32m(wxhw, WX_PX_RR_CFG(i),
+		      WX_PX_RR_CFG_RR_EN, 0);
+	}
+
+	/* flush all queues disables */
+	WX_WRITE_FLUSH(wxhw);
+
+	/* Prevent the PCI-E bus from hanging by disabling PCI-E master
+	 * access and verify no pending requests
+	 */
+	return wx_disable_pcie_master(wxhw);
+}
+EXPORT_SYMBOL(wx_stop_adapter);
+
+void wx_reset_misc(struct wx_hw *wxhw)
+{
+	int i;
+
+	/* receive packets that size > 2048 */
+	wr32m(wxhw, WX_MAC_RX_CFG, WX_MAC_RX_CFG_JE, WX_MAC_RX_CFG_JE);
+
+	/* clear counters on read */
+	wr32m(wxhw, WX_MMC_CONTROL,
+	      WX_MMC_CONTROL_RSTONRD, WX_MMC_CONTROL_RSTONRD);
+
+	wr32m(wxhw, WX_MAC_RX_FLOW_CTRL,
+	      WX_MAC_RX_FLOW_CTRL_RFE, WX_MAC_RX_FLOW_CTRL_RFE);
+
+	wr32(wxhw, WX_MAC_PKT_FLT, WX_MAC_PKT_FLT_PR);
+
+	wr32m(wxhw, WX_MIS_RST_ST,
+	      WX_MIS_RST_ST_RST_INIT, 0x1E00);
+
+	/* errata 4: initialize mng flex tbl and wakeup flex tbl*/
+	wr32(wxhw, WX_PSR_MNG_FLEX_SEL, 0);
+	for (i = 0; i < 16; i++) {
+		wr32(wxhw, WX_PSR_MNG_FLEX_DW_L(i), 0);
+		wr32(wxhw, WX_PSR_MNG_FLEX_DW_H(i), 0);
+		wr32(wxhw, WX_PSR_MNG_FLEX_MSK(i), 0);
+	}
+	wr32(wxhw, WX_PSR_LAN_FLEX_SEL, 0);
+	for (i = 0; i < 16; i++) {
+		wr32(wxhw, WX_PSR_LAN_FLEX_DW_L(i), 0);
+		wr32(wxhw, WX_PSR_LAN_FLEX_DW_H(i), 0);
+		wr32(wxhw, WX_PSR_LAN_FLEX_MSK(i), 0);
+	}
+
+	/* set pause frame dst mac addr */
+	wr32(wxhw, WX_RDB_PFCMACDAL, 0xC2000001);
+	wr32(wxhw, WX_RDB_PFCMACDAH, 0x0180);
+}
+EXPORT_SYMBOL(wx_reset_misc);
+
+int wx_sw_init(struct wx_hw *wxhw)
+{
+	struct pci_dev *pdev = wxhw->pdev;
+	u32 ssid = 0;
+	int err = 0;
+
+	wxhw->vendor_id = pdev->vendor;
+	wxhw->device_id = pdev->device;
+	wxhw->revision_id = pdev->revision;
+	wxhw->oem_svid = pdev->subsystem_vendor;
+	wxhw->oem_ssid = pdev->subsystem_device;
+	wxhw->bus.device = PCI_SLOT(pdev->devfn);
+	wxhw->bus.func = PCI_FUNC(pdev->devfn);
+
+	if (wxhw->oem_svid == PCI_VENDOR_ID_WANGXUN) {
+		wxhw->subsystem_vendor_id = pdev->subsystem_vendor;
+		wxhw->subsystem_device_id = pdev->subsystem_device;
+	} else {
+		err = wx_flash_read_dword(wxhw, 0xfffdc, &ssid);
+		if (!err)
+			wxhw->subsystem_device_id = swab16((u16)ssid);
+
+		return err;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL(wx_sw_init);
+
+MODULE_LICENSE("GPL");