cd09a6ac85
The struct mobiveil_rp_ops is not modified in this driver. Thus, make this struct constant, which also moves data to a read-only section decreasing object size and also improving overall security. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 4446 336 32 4814 12ce drivers/pci/controller/mobiveil/pcie-layerscape-gen4.o After: ===== text data bss dec hex filename 4454 328 32 4814 12ce drivers/pci/controller/mobiveil/pcie-layerscape-gen4.o [kwilczynski: commit log] Link: https://lore.kernel.org/linux-pci/189fd881cc8fd80220e74e91820e12cf3a5be114.1719260294.git.christophe.jaillet@wanadoo.fr Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
226 lines
6.5 KiB
C
226 lines
6.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* PCIe host controller driver for Mobiveil PCIe Host controller
|
|
*
|
|
* Copyright (c) 2018 Mobiveil Inc.
|
|
* Copyright 2019 NXP
|
|
*
|
|
* Author: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
|
|
* Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
|
|
*/
|
|
|
|
#ifndef _PCIE_MOBIVEIL_H
|
|
#define _PCIE_MOBIVEIL_H
|
|
|
|
#include <linux/pci.h>
|
|
#include <linux/irq.h>
|
|
#include <linux/msi.h>
|
|
#include "../../pci.h"
|
|
|
|
/* register offsets and bit positions */
|
|
|
|
/*
|
|
* translation tables are grouped into windows, each window registers are
|
|
* grouped into blocks of 4 or 16 registers each
|
|
*/
|
|
#define PAB_REG_BLOCK_SIZE 16
|
|
#define PAB_EXT_REG_BLOCK_SIZE 4
|
|
|
|
#define PAB_REG_ADDR(offset, win) \
|
|
(offset + (win * PAB_REG_BLOCK_SIZE))
|
|
#define PAB_EXT_REG_ADDR(offset, win) \
|
|
(offset + (win * PAB_EXT_REG_BLOCK_SIZE))
|
|
|
|
#define LTSSM_STATUS 0x0404
|
|
#define LTSSM_STATUS_L0_MASK 0x3f
|
|
#define LTSSM_STATUS_L0 0x2d
|
|
|
|
#define PAB_CTRL 0x0808
|
|
#define AMBA_PIO_ENABLE_SHIFT 0
|
|
#define PEX_PIO_ENABLE_SHIFT 1
|
|
#define PAGE_SEL_SHIFT 13
|
|
#define PAGE_SEL_MASK 0x3f
|
|
#define PAGE_LO_MASK 0x3ff
|
|
#define PAGE_SEL_OFFSET_SHIFT 10
|
|
|
|
#define PAB_ACTIVITY_STAT 0x81c
|
|
|
|
#define PAB_AXI_PIO_CTRL 0x0840
|
|
#define APIO_EN_MASK 0xf
|
|
|
|
#define PAB_PEX_PIO_CTRL 0x08c0
|
|
#define PIO_ENABLE_SHIFT 0
|
|
|
|
#define PAB_INTP_AMBA_MISC_ENB 0x0b0c
|
|
#define PAB_INTP_AMBA_MISC_STAT 0x0b1c
|
|
#define PAB_INTP_RESET BIT(1)
|
|
#define PAB_INTP_MSI BIT(3)
|
|
#define PAB_INTP_INTA BIT(5)
|
|
#define PAB_INTP_INTB BIT(6)
|
|
#define PAB_INTP_INTC BIT(7)
|
|
#define PAB_INTP_INTD BIT(8)
|
|
#define PAB_INTP_PCIE_UE BIT(9)
|
|
#define PAB_INTP_IE_PMREDI BIT(29)
|
|
#define PAB_INTP_IE_EC BIT(30)
|
|
#define PAB_INTP_MSI_MASK PAB_INTP_MSI
|
|
#define PAB_INTP_INTX_MASK (PAB_INTP_INTA | PAB_INTP_INTB |\
|
|
PAB_INTP_INTC | PAB_INTP_INTD)
|
|
|
|
#define PAB_AXI_AMAP_CTRL(win) PAB_REG_ADDR(0x0ba0, win)
|
|
#define WIN_ENABLE_SHIFT 0
|
|
#define WIN_TYPE_SHIFT 1
|
|
#define WIN_TYPE_MASK 0x3
|
|
#define WIN_SIZE_MASK 0xfffffc00
|
|
|
|
#define PAB_EXT_AXI_AMAP_SIZE(win) PAB_EXT_REG_ADDR(0xbaf0, win)
|
|
|
|
#define PAB_EXT_AXI_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0x80a0, win)
|
|
#define PAB_AXI_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x0ba4, win)
|
|
#define AXI_WINDOW_ALIGN_MASK 3
|
|
|
|
#define PAB_AXI_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x0ba8, win)
|
|
#define PAB_BUS_SHIFT 24
|
|
#define PAB_DEVICE_SHIFT 19
|
|
#define PAB_FUNCTION_SHIFT 16
|
|
|
|
#define PAB_AXI_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x0bac, win)
|
|
#define PAB_INTP_AXI_PIO_CLASS 0x474
|
|
|
|
#define PAB_PEX_AMAP_CTRL(win) PAB_REG_ADDR(0x4ba0, win)
|
|
#define AMAP_CTRL_EN_SHIFT 0
|
|
#define AMAP_CTRL_TYPE_SHIFT 1
|
|
#define AMAP_CTRL_TYPE_MASK 3
|
|
|
|
#define PAB_EXT_PEX_AMAP_SIZEN(win) PAB_EXT_REG_ADDR(0xbef0, win)
|
|
#define PAB_EXT_PEX_AMAP_AXI_WIN(win) PAB_EXT_REG_ADDR(0xb4a0, win)
|
|
#define PAB_PEX_AMAP_AXI_WIN(win) PAB_REG_ADDR(0x4ba4, win)
|
|
#define PAB_PEX_AMAP_PEX_WIN_L(win) PAB_REG_ADDR(0x4ba8, win)
|
|
#define PAB_PEX_AMAP_PEX_WIN_H(win) PAB_REG_ADDR(0x4bac, win)
|
|
|
|
/* starting offset of INTX bits in status register */
|
|
#define PAB_INTX_START 5
|
|
|
|
/* supported number of MSI interrupts */
|
|
#define PCI_NUM_MSI 16
|
|
|
|
/* MSI registers */
|
|
#define MSI_BASE_LO_OFFSET 0x04
|
|
#define MSI_BASE_HI_OFFSET 0x08
|
|
#define MSI_SIZE_OFFSET 0x0c
|
|
#define MSI_ENABLE_OFFSET 0x14
|
|
#define MSI_STATUS_OFFSET 0x18
|
|
#define MSI_DATA_OFFSET 0x20
|
|
#define MSI_ADDR_L_OFFSET 0x24
|
|
#define MSI_ADDR_H_OFFSET 0x28
|
|
|
|
/* outbound and inbound window definitions */
|
|
#define WIN_NUM_0 0
|
|
#define WIN_NUM_1 1
|
|
#define CFG_WINDOW_TYPE 0
|
|
#define IO_WINDOW_TYPE 1
|
|
#define MEM_WINDOW_TYPE 2
|
|
#define IB_WIN_SIZE ((u64)256 * 1024 * 1024 * 1024)
|
|
#define MAX_PIO_WINDOWS 8
|
|
|
|
/* Parameters for the waiting for link up routine */
|
|
#define LINK_WAIT_MAX_RETRIES 10
|
|
#define LINK_WAIT_MIN 90000
|
|
#define LINK_WAIT_MAX 100000
|
|
|
|
#define PAGED_ADDR_BNDRY 0xc00
|
|
#define OFFSET_TO_PAGE_ADDR(off) \
|
|
((off & PAGE_LO_MASK) | PAGED_ADDR_BNDRY)
|
|
#define OFFSET_TO_PAGE_IDX(off) \
|
|
((off >> PAGE_SEL_OFFSET_SHIFT) & PAGE_SEL_MASK)
|
|
|
|
struct mobiveil_msi { /* MSI information */
|
|
struct mutex lock; /* protect bitmap variable */
|
|
struct irq_domain *msi_domain;
|
|
struct irq_domain *dev_domain;
|
|
phys_addr_t msi_pages_phys;
|
|
int num_of_vectors;
|
|
DECLARE_BITMAP(msi_irq_in_use, PCI_NUM_MSI);
|
|
};
|
|
|
|
struct mobiveil_pcie;
|
|
|
|
struct mobiveil_rp_ops {
|
|
int (*interrupt_init)(struct mobiveil_pcie *pcie);
|
|
};
|
|
|
|
struct mobiveil_root_port {
|
|
void __iomem *config_axi_slave_base; /* endpoint config base */
|
|
struct resource *ob_io_res;
|
|
const struct mobiveil_rp_ops *ops;
|
|
int irq;
|
|
raw_spinlock_t intx_mask_lock;
|
|
struct irq_domain *intx_domain;
|
|
struct mobiveil_msi msi;
|
|
struct pci_host_bridge *bridge;
|
|
};
|
|
|
|
struct mobiveil_pab_ops {
|
|
int (*link_up)(struct mobiveil_pcie *pcie);
|
|
};
|
|
|
|
struct mobiveil_pcie {
|
|
struct platform_device *pdev;
|
|
void __iomem *csr_axi_slave_base; /* root port config base */
|
|
void __iomem *apb_csr_base; /* MSI register base */
|
|
phys_addr_t pcie_reg_base; /* Physical PCIe Controller Base */
|
|
int apio_wins;
|
|
int ppio_wins;
|
|
int ob_wins_configured; /* configured outbound windows */
|
|
int ib_wins_configured; /* configured inbound windows */
|
|
const struct mobiveil_pab_ops *ops;
|
|
struct mobiveil_root_port rp;
|
|
};
|
|
|
|
int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie);
|
|
int mobiveil_host_init(struct mobiveil_pcie *pcie, bool reinit);
|
|
bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie);
|
|
int mobiveil_bringup_link(struct mobiveil_pcie *pcie);
|
|
void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
|
|
u64 pci_addr, u32 type, u64 size);
|
|
void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
|
|
u64 pci_addr, u32 type, u64 size);
|
|
u32 mobiveil_csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size);
|
|
void mobiveil_csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off,
|
|
size_t size);
|
|
|
|
static inline u32 mobiveil_csr_readl(struct mobiveil_pcie *pcie, u32 off)
|
|
{
|
|
return mobiveil_csr_read(pcie, off, 0x4);
|
|
}
|
|
|
|
static inline u16 mobiveil_csr_readw(struct mobiveil_pcie *pcie, u32 off)
|
|
{
|
|
return mobiveil_csr_read(pcie, off, 0x2);
|
|
}
|
|
|
|
static inline u8 mobiveil_csr_readb(struct mobiveil_pcie *pcie, u32 off)
|
|
{
|
|
return mobiveil_csr_read(pcie, off, 0x1);
|
|
}
|
|
|
|
|
|
static inline void mobiveil_csr_writel(struct mobiveil_pcie *pcie, u32 val,
|
|
u32 off)
|
|
{
|
|
mobiveil_csr_write(pcie, val, off, 0x4);
|
|
}
|
|
|
|
static inline void mobiveil_csr_writew(struct mobiveil_pcie *pcie, u16 val,
|
|
u32 off)
|
|
{
|
|
mobiveil_csr_write(pcie, val, off, 0x2);
|
|
}
|
|
|
|
static inline void mobiveil_csr_writeb(struct mobiveil_pcie *pcie, u8 val,
|
|
u32 off)
|
|
{
|
|
mobiveil_csr_write(pcie, val, off, 0x1);
|
|
}
|
|
|
|
#endif /* _PCIE_MOBIVEIL_H */
|