151ba902aSAviad Krawczyk /* 251ba902aSAviad Krawczyk * Huawei HiNIC PCI Express Linux driver 351ba902aSAviad Krawczyk * Copyright(c) 2017 Huawei Technologies Co., Ltd 451ba902aSAviad Krawczyk * 551ba902aSAviad Krawczyk * This program is free software; you can redistribute it and/or modify it 651ba902aSAviad Krawczyk * under the terms and conditions of the GNU General Public License, 751ba902aSAviad Krawczyk * version 2, as published by the Free Software Foundation. 851ba902aSAviad Krawczyk * 951ba902aSAviad Krawczyk * This program is distributed in the hope it will be useful, but WITHOUT 1051ba902aSAviad Krawczyk * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 1151ba902aSAviad Krawczyk * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1251ba902aSAviad Krawczyk * for more details. 1351ba902aSAviad Krawczyk * 1451ba902aSAviad Krawczyk */ 1551ba902aSAviad Krawczyk 1651ba902aSAviad Krawczyk #include <linux/pci.h> 1751ba902aSAviad Krawczyk #include <linux/device.h> 1851ba902aSAviad Krawczyk #include <linux/errno.h> 1951ba902aSAviad Krawczyk #include <linux/io.h> 2051ba902aSAviad Krawczyk #include <linux/types.h> 2151ba902aSAviad Krawczyk #include <linux/bitops.h> 2251ba902aSAviad Krawczyk 2351ba902aSAviad Krawczyk #include "hinic_hw_csr.h" 2451ba902aSAviad Krawczyk #include "hinic_hw_if.h" 2551ba902aSAviad Krawczyk 2651ba902aSAviad Krawczyk #define PCIE_ATTR_ENTRY 0 2751ba902aSAviad Krawczyk 2851ba902aSAviad Krawczyk /** 2951ba902aSAviad Krawczyk * hwif_ready - test if the HW is ready for use 3051ba902aSAviad Krawczyk * @hwif: the HW interface of a pci function device 3151ba902aSAviad Krawczyk * 3251ba902aSAviad Krawczyk * Return 0 - Success, negative - Failure 3351ba902aSAviad Krawczyk **/ 3451ba902aSAviad Krawczyk static int hwif_ready(struct hinic_hwif *hwif) 3551ba902aSAviad Krawczyk { 3651ba902aSAviad Krawczyk struct pci_dev *pdev = hwif->pdev; 3751ba902aSAviad Krawczyk u32 addr, attr1; 3851ba902aSAviad Krawczyk 3951ba902aSAviad Krawczyk addr = HINIC_CSR_FUNC_ATTR1_ADDR; 4051ba902aSAviad Krawczyk attr1 = hinic_hwif_read_reg(hwif, addr); 4151ba902aSAviad Krawczyk 4251ba902aSAviad Krawczyk if (!HINIC_FA1_GET(attr1, INIT_STATUS)) { 4351ba902aSAviad Krawczyk dev_err(&pdev->dev, "hwif status is not ready\n"); 4451ba902aSAviad Krawczyk return -EFAULT; 4551ba902aSAviad Krawczyk } 4651ba902aSAviad Krawczyk 4751ba902aSAviad Krawczyk return 0; 4851ba902aSAviad Krawczyk } 4951ba902aSAviad Krawczyk 5051ba902aSAviad Krawczyk /** 5151ba902aSAviad Krawczyk * set_hwif_attr - set the attributes in the relevant members in hwif 5251ba902aSAviad Krawczyk * @hwif: the HW interface of a pci function device 5351ba902aSAviad Krawczyk * @attr0: the first attribute that was read from the hw 5451ba902aSAviad Krawczyk * @attr1: the second attribute that was read from the hw 5551ba902aSAviad Krawczyk **/ 5651ba902aSAviad Krawczyk static void set_hwif_attr(struct hinic_hwif *hwif, u32 attr0, u32 attr1) 5751ba902aSAviad Krawczyk { 5851ba902aSAviad Krawczyk hwif->attr.func_idx = HINIC_FA0_GET(attr0, FUNC_IDX); 5951ba902aSAviad Krawczyk hwif->attr.pf_idx = HINIC_FA0_GET(attr0, PF_IDX); 6051ba902aSAviad Krawczyk hwif->attr.pci_intf_idx = HINIC_FA0_GET(attr0, PCI_INTF_IDX); 6151ba902aSAviad Krawczyk hwif->attr.func_type = HINIC_FA0_GET(attr0, FUNC_TYPE); 6251ba902aSAviad Krawczyk 6351ba902aSAviad Krawczyk hwif->attr.num_aeqs = BIT(HINIC_FA1_GET(attr1, AEQS_PER_FUNC)); 6451ba902aSAviad Krawczyk hwif->attr.num_ceqs = BIT(HINIC_FA1_GET(attr1, CEQS_PER_FUNC)); 6551ba902aSAviad Krawczyk hwif->attr.num_irqs = BIT(HINIC_FA1_GET(attr1, IRQS_PER_FUNC)); 6651ba902aSAviad Krawczyk hwif->attr.num_dma_attr = BIT(HINIC_FA1_GET(attr1, DMA_ATTR_PER_FUNC)); 6751ba902aSAviad Krawczyk } 6851ba902aSAviad Krawczyk 6951ba902aSAviad Krawczyk /** 7051ba902aSAviad Krawczyk * read_hwif_attr - read the attributes and set members in hwif 7151ba902aSAviad Krawczyk * @hwif: the HW interface of a pci function device 7251ba902aSAviad Krawczyk **/ 7351ba902aSAviad Krawczyk static void read_hwif_attr(struct hinic_hwif *hwif) 7451ba902aSAviad Krawczyk { 7551ba902aSAviad Krawczyk u32 addr, attr0, attr1; 7651ba902aSAviad Krawczyk 7751ba902aSAviad Krawczyk addr = HINIC_CSR_FUNC_ATTR0_ADDR; 7851ba902aSAviad Krawczyk attr0 = hinic_hwif_read_reg(hwif, addr); 7951ba902aSAviad Krawczyk 8051ba902aSAviad Krawczyk addr = HINIC_CSR_FUNC_ATTR1_ADDR; 8151ba902aSAviad Krawczyk attr1 = hinic_hwif_read_reg(hwif, addr); 8251ba902aSAviad Krawczyk 8351ba902aSAviad Krawczyk set_hwif_attr(hwif, attr0, attr1); 8451ba902aSAviad Krawczyk } 8551ba902aSAviad Krawczyk 8651ba902aSAviad Krawczyk /** 8751ba902aSAviad Krawczyk * set_ppf - try to set hwif as ppf and set the type of hwif in this case 8851ba902aSAviad Krawczyk * @hwif: the HW interface of a pci function device 8951ba902aSAviad Krawczyk **/ 9051ba902aSAviad Krawczyk static void set_ppf(struct hinic_hwif *hwif) 9151ba902aSAviad Krawczyk { 9251ba902aSAviad Krawczyk struct hinic_func_attr *attr = &hwif->attr; 9351ba902aSAviad Krawczyk u32 addr, val, ppf_election; 9451ba902aSAviad Krawczyk 9551ba902aSAviad Krawczyk /* Read Modify Write */ 9651ba902aSAviad Krawczyk addr = HINIC_CSR_PPF_ELECTION_ADDR(HINIC_HWIF_PCI_INTF(hwif)); 9751ba902aSAviad Krawczyk 9851ba902aSAviad Krawczyk val = hinic_hwif_read_reg(hwif, addr); 9951ba902aSAviad Krawczyk val = HINIC_PPF_ELECTION_CLEAR(val, IDX); 10051ba902aSAviad Krawczyk 10151ba902aSAviad Krawczyk ppf_election = HINIC_PPF_ELECTION_SET(HINIC_HWIF_FUNC_IDX(hwif), IDX); 10251ba902aSAviad Krawczyk 10351ba902aSAviad Krawczyk val |= ppf_election; 10451ba902aSAviad Krawczyk hinic_hwif_write_reg(hwif, addr, val); 10551ba902aSAviad Krawczyk 10651ba902aSAviad Krawczyk /* check PPF */ 10751ba902aSAviad Krawczyk val = hinic_hwif_read_reg(hwif, addr); 10851ba902aSAviad Krawczyk 10951ba902aSAviad Krawczyk attr->ppf_idx = HINIC_PPF_ELECTION_GET(val, IDX); 11051ba902aSAviad Krawczyk if (attr->ppf_idx == HINIC_HWIF_FUNC_IDX(hwif)) 11151ba902aSAviad Krawczyk attr->func_type = HINIC_PPF; 11251ba902aSAviad Krawczyk } 11351ba902aSAviad Krawczyk 11451ba902aSAviad Krawczyk /** 11551ba902aSAviad Krawczyk * set_dma_attr - set the dma attributes in the HW 11651ba902aSAviad Krawczyk * @hwif: the HW interface of a pci function device 11751ba902aSAviad Krawczyk * @entry_idx: the entry index in the dma table 11851ba902aSAviad Krawczyk * @st: PCIE TLP steering tag 11951ba902aSAviad Krawczyk * @at: PCIE TLP AT field 12051ba902aSAviad Krawczyk * @ph: PCIE TLP Processing Hint field 12151ba902aSAviad Krawczyk * @no_snooping: PCIE TLP No snooping 12251ba902aSAviad Krawczyk * @tph_en: PCIE TLP Processing Hint Enable 12351ba902aSAviad Krawczyk **/ 12451ba902aSAviad Krawczyk static void set_dma_attr(struct hinic_hwif *hwif, u32 entry_idx, 12551ba902aSAviad Krawczyk u8 st, u8 at, u8 ph, 12651ba902aSAviad Krawczyk enum hinic_pcie_nosnoop no_snooping, 12751ba902aSAviad Krawczyk enum hinic_pcie_tph tph_en) 12851ba902aSAviad Krawczyk { 12951ba902aSAviad Krawczyk u32 addr, val, dma_attr_entry; 13051ba902aSAviad Krawczyk 13151ba902aSAviad Krawczyk /* Read Modify Write */ 13251ba902aSAviad Krawczyk addr = HINIC_CSR_DMA_ATTR_ADDR(entry_idx); 13351ba902aSAviad Krawczyk 13451ba902aSAviad Krawczyk val = hinic_hwif_read_reg(hwif, addr); 13551ba902aSAviad Krawczyk val = HINIC_DMA_ATTR_CLEAR(val, ST) & 13651ba902aSAviad Krawczyk HINIC_DMA_ATTR_CLEAR(val, AT) & 13751ba902aSAviad Krawczyk HINIC_DMA_ATTR_CLEAR(val, PH) & 13851ba902aSAviad Krawczyk HINIC_DMA_ATTR_CLEAR(val, NO_SNOOPING) & 13951ba902aSAviad Krawczyk HINIC_DMA_ATTR_CLEAR(val, TPH_EN); 14051ba902aSAviad Krawczyk 14151ba902aSAviad Krawczyk dma_attr_entry = HINIC_DMA_ATTR_SET(st, ST) | 14251ba902aSAviad Krawczyk HINIC_DMA_ATTR_SET(at, AT) | 14351ba902aSAviad Krawczyk HINIC_DMA_ATTR_SET(ph, PH) | 14451ba902aSAviad Krawczyk HINIC_DMA_ATTR_SET(no_snooping, NO_SNOOPING) | 14551ba902aSAviad Krawczyk HINIC_DMA_ATTR_SET(tph_en, TPH_EN); 14651ba902aSAviad Krawczyk 14751ba902aSAviad Krawczyk val |= dma_attr_entry; 14851ba902aSAviad Krawczyk hinic_hwif_write_reg(hwif, addr, val); 14951ba902aSAviad Krawczyk } 15051ba902aSAviad Krawczyk 15151ba902aSAviad Krawczyk /** 15251ba902aSAviad Krawczyk * dma_attr_table_init - initialize the the default dma attributes 15351ba902aSAviad Krawczyk * @hwif: the HW interface of a pci function device 15451ba902aSAviad Krawczyk **/ 15551ba902aSAviad Krawczyk static void dma_attr_init(struct hinic_hwif *hwif) 15651ba902aSAviad Krawczyk { 15751ba902aSAviad Krawczyk set_dma_attr(hwif, PCIE_ATTR_ENTRY, HINIC_PCIE_ST_DISABLE, 15851ba902aSAviad Krawczyk HINIC_PCIE_AT_DISABLE, HINIC_PCIE_PH_DISABLE, 15951ba902aSAviad Krawczyk HINIC_PCIE_SNOOP, HINIC_PCIE_TPH_DISABLE); 16051ba902aSAviad Krawczyk } 16151ba902aSAviad Krawczyk 16251ba902aSAviad Krawczyk /** 16351ba902aSAviad Krawczyk * hinic_init_hwif - initialize the hw interface 16451ba902aSAviad Krawczyk * @hwif: the HW interface of a pci function device 16551ba902aSAviad Krawczyk * @pdev: the pci device for acessing PCI resources 16651ba902aSAviad Krawczyk * 16751ba902aSAviad Krawczyk * Return 0 - Success, negative - Failure 16851ba902aSAviad Krawczyk **/ 16951ba902aSAviad Krawczyk int hinic_init_hwif(struct hinic_hwif *hwif, struct pci_dev *pdev) 17051ba902aSAviad Krawczyk { 17151ba902aSAviad Krawczyk int err; 17251ba902aSAviad Krawczyk 17351ba902aSAviad Krawczyk hwif->pdev = pdev; 17451ba902aSAviad Krawczyk 17551ba902aSAviad Krawczyk hwif->cfg_regs_bar = pci_ioremap_bar(pdev, HINIC_PCI_CFG_REGS_BAR); 17651ba902aSAviad Krawczyk if (!hwif->cfg_regs_bar) { 17751ba902aSAviad Krawczyk dev_err(&pdev->dev, "Failed to map configuration regs\n"); 17851ba902aSAviad Krawczyk return -ENOMEM; 17951ba902aSAviad Krawczyk } 18051ba902aSAviad Krawczyk 18151ba902aSAviad Krawczyk err = hwif_ready(hwif); 18251ba902aSAviad Krawczyk if (err) { 18351ba902aSAviad Krawczyk dev_err(&pdev->dev, "HW interface is not ready\n"); 18451ba902aSAviad Krawczyk goto err_hwif_ready; 18551ba902aSAviad Krawczyk } 18651ba902aSAviad Krawczyk 18751ba902aSAviad Krawczyk read_hwif_attr(hwif); 18851ba902aSAviad Krawczyk 18951ba902aSAviad Krawczyk if (HINIC_IS_PF(hwif)) 19051ba902aSAviad Krawczyk set_ppf(hwif); 19151ba902aSAviad Krawczyk 19251ba902aSAviad Krawczyk /* No transactionss before DMA is initialized */ 19351ba902aSAviad Krawczyk dma_attr_init(hwif); 19451ba902aSAviad Krawczyk return 0; 19551ba902aSAviad Krawczyk 19651ba902aSAviad Krawczyk err_hwif_ready: 19751ba902aSAviad Krawczyk iounmap(hwif->cfg_regs_bar); 19851ba902aSAviad Krawczyk return err; 19951ba902aSAviad Krawczyk } 20051ba902aSAviad Krawczyk 20151ba902aSAviad Krawczyk /** 20251ba902aSAviad Krawczyk * hinic_free_hwif - free the HW interface 20351ba902aSAviad Krawczyk * @hwif: the HW interface of a pci function device 20451ba902aSAviad Krawczyk **/ 20551ba902aSAviad Krawczyk void hinic_free_hwif(struct hinic_hwif *hwif) 20651ba902aSAviad Krawczyk { 20751ba902aSAviad Krawczyk iounmap(hwif->cfg_regs_bar); 20851ba902aSAviad Krawczyk } 209