1 /* SPDX-License-Identifier: GPL-2.0 */ 2 // Copyright (c) 2017 Cadence 3 // Cadence PCIe controller driver. 4 // Author: Cyrille Pitchen <cyrille.pitchen@free-electrons.com> 5 6 #ifndef _PCIE_CADENCE_H 7 #define _PCIE_CADENCE_H 8 9 #include <linux/kernel.h> 10 #include <linux/pci.h> 11 #include <linux/pci-epf.h> 12 #include <linux/phy/phy.h> 13 14 /* Parameters for the waiting for link up routine */ 15 #define LINK_WAIT_MAX_RETRIES 10 16 #define LINK_WAIT_USLEEP_MIN 90000 17 #define LINK_WAIT_USLEEP_MAX 100000 18 19 /* 20 * Local Management Registers 21 */ 22 #define CDNS_PCIE_LM_BASE 0x00100000 23 24 /* Vendor ID Register */ 25 #define CDNS_PCIE_LM_ID (CDNS_PCIE_LM_BASE + 0x0044) 26 #define CDNS_PCIE_LM_ID_VENDOR_MASK GENMASK(15, 0) 27 #define CDNS_PCIE_LM_ID_VENDOR_SHIFT 0 28 #define CDNS_PCIE_LM_ID_VENDOR(vid) \ 29 (((vid) << CDNS_PCIE_LM_ID_VENDOR_SHIFT) & CDNS_PCIE_LM_ID_VENDOR_MASK) 30 #define CDNS_PCIE_LM_ID_SUBSYS_MASK GENMASK(31, 16) 31 #define CDNS_PCIE_LM_ID_SUBSYS_SHIFT 16 32 #define CDNS_PCIE_LM_ID_SUBSYS(sub) \ 33 (((sub) << CDNS_PCIE_LM_ID_SUBSYS_SHIFT) & CDNS_PCIE_LM_ID_SUBSYS_MASK) 34 35 /* Root Port Requester ID Register */ 36 #define CDNS_PCIE_LM_RP_RID (CDNS_PCIE_LM_BASE + 0x0228) 37 #define CDNS_PCIE_LM_RP_RID_MASK GENMASK(15, 0) 38 #define CDNS_PCIE_LM_RP_RID_SHIFT 0 39 #define CDNS_PCIE_LM_RP_RID_(rid) \ 40 (((rid) << CDNS_PCIE_LM_RP_RID_SHIFT) & CDNS_PCIE_LM_RP_RID_MASK) 41 42 /* Endpoint Bus and Device Number Register */ 43 #define CDNS_PCIE_LM_EP_ID (CDNS_PCIE_LM_BASE + 0x022c) 44 #define CDNS_PCIE_LM_EP_ID_DEV_MASK GENMASK(4, 0) 45 #define CDNS_PCIE_LM_EP_ID_DEV_SHIFT 0 46 #define CDNS_PCIE_LM_EP_ID_BUS_MASK GENMASK(15, 8) 47 #define CDNS_PCIE_LM_EP_ID_BUS_SHIFT 8 48 49 /* Endpoint Function f BAR b Configuration Registers */ 50 #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG(bar, fn) \ 51 (((bar) < BAR_4) ? CDNS_PCIE_LM_EP_FUNC_BAR_CFG0(fn) : CDNS_PCIE_LM_EP_FUNC_BAR_CFG1(fn)) 52 #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG0(fn) \ 53 (CDNS_PCIE_LM_BASE + 0x0240 + (fn) * 0x0008) 54 #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG1(fn) \ 55 (CDNS_PCIE_LM_BASE + 0x0244 + (fn) * 0x0008) 56 #define CDNS_PCIE_LM_EP_VFUNC_BAR_CFG(bar, fn) \ 57 (((bar) < BAR_4) ? CDNS_PCIE_LM_EP_VFUNC_BAR_CFG0(fn) : CDNS_PCIE_LM_EP_VFUNC_BAR_CFG1(fn)) 58 #define CDNS_PCIE_LM_EP_VFUNC_BAR_CFG0(fn) \ 59 (CDNS_PCIE_LM_BASE + 0x0280 + (fn) * 0x0008) 60 #define CDNS_PCIE_LM_EP_VFUNC_BAR_CFG1(fn) \ 61 (CDNS_PCIE_LM_BASE + 0x0284 + (fn) * 0x0008) 62 #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b) \ 63 (GENMASK(4, 0) << ((b) * 8)) 64 #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE(b, a) \ 65 (((a) << ((b) * 8)) & CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b)) 66 #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b) \ 67 (GENMASK(7, 5) << ((b) * 8)) 68 #define CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL(b, c) \ 69 (((c) << ((b) * 8 + 5)) & CDNS_PCIE_LM_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b)) 70 71 /* Endpoint Function Configuration Register */ 72 #define CDNS_PCIE_LM_EP_FUNC_CFG (CDNS_PCIE_LM_BASE + 0x02c0) 73 74 /* Root Complex BAR Configuration Register */ 75 #define CDNS_PCIE_LM_RC_BAR_CFG (CDNS_PCIE_LM_BASE + 0x0300) 76 #define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE_MASK GENMASK(5, 0) 77 #define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE(a) \ 78 (((a) << 0) & CDNS_PCIE_LM_RC_BAR_CFG_BAR0_APERTURE_MASK) 79 #define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL_MASK GENMASK(8, 6) 80 #define CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL(c) \ 81 (((c) << 6) & CDNS_PCIE_LM_RC_BAR_CFG_BAR0_CTRL_MASK) 82 #define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE_MASK GENMASK(13, 9) 83 #define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE(a) \ 84 (((a) << 9) & CDNS_PCIE_LM_RC_BAR_CFG_BAR1_APERTURE_MASK) 85 #define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL_MASK GENMASK(16, 14) 86 #define CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL(c) \ 87 (((c) << 14) & CDNS_PCIE_LM_RC_BAR_CFG_BAR1_CTRL_MASK) 88 #define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_ENABLE BIT(17) 89 #define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_32BITS 0 90 #define CDNS_PCIE_LM_RC_BAR_CFG_PREFETCH_MEM_64BITS BIT(18) 91 #define CDNS_PCIE_LM_RC_BAR_CFG_IO_ENABLE BIT(19) 92 #define CDNS_PCIE_LM_RC_BAR_CFG_IO_16BITS 0 93 #define CDNS_PCIE_LM_RC_BAR_CFG_IO_32BITS BIT(20) 94 #define CDNS_PCIE_LM_RC_BAR_CFG_CHECK_ENABLE BIT(31) 95 96 /* BAR control values applicable to both Endpoint Function and Root Complex */ 97 #define CDNS_PCIE_LM_BAR_CFG_CTRL_DISABLED 0x0 98 #define CDNS_PCIE_LM_BAR_CFG_CTRL_IO_32BITS 0x1 99 #define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_32BITS 0x4 100 #define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_32BITS 0x5 101 #define CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_64BITS 0x6 102 #define CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS 0x7 103 104 #define LM_RC_BAR_CFG_CTRL_DISABLED(bar) \ 105 (CDNS_PCIE_LM_BAR_CFG_CTRL_DISABLED << (((bar) * 8) + 6)) 106 #define LM_RC_BAR_CFG_CTRL_IO_32BITS(bar) \ 107 (CDNS_PCIE_LM_BAR_CFG_CTRL_IO_32BITS << (((bar) * 8) + 6)) 108 #define LM_RC_BAR_CFG_CTRL_MEM_32BITS(bar) \ 109 (CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_32BITS << (((bar) * 8) + 6)) 110 #define LM_RC_BAR_CFG_CTRL_PREF_MEM_32BITS(bar) \ 111 (CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_32BITS << (((bar) * 8) + 6)) 112 #define LM_RC_BAR_CFG_CTRL_MEM_64BITS(bar) \ 113 (CDNS_PCIE_LM_BAR_CFG_CTRL_MEM_64BITS << (((bar) * 8) + 6)) 114 #define LM_RC_BAR_CFG_CTRL_PREF_MEM_64BITS(bar) \ 115 (CDNS_PCIE_LM_BAR_CFG_CTRL_PREFETCH_MEM_64BITS << (((bar) * 8) + 6)) 116 #define LM_RC_BAR_CFG_APERTURE(bar, aperture) \ 117 (((aperture) - 2) << ((bar) * 8)) 118 119 /* PTM Control Register */ 120 #define CDNS_PCIE_LM_PTM_CTRL (CDNS_PCIE_LM_BASE + 0x0da8) 121 #define CDNS_PCIE_LM_TPM_CTRL_PTMRSEN BIT(17) 122 123 /* 124 * Endpoint Function Registers (PCI configuration space for endpoint functions) 125 */ 126 #define CDNS_PCIE_EP_FUNC_BASE(fn) (((fn) << 12) & GENMASK(19, 12)) 127 128 #define CDNS_PCIE_EP_FUNC_MSI_CAP_OFFSET 0x90 129 #define CDNS_PCIE_EP_FUNC_MSIX_CAP_OFFSET 0xb0 130 #define CDNS_PCIE_EP_FUNC_DEV_CAP_OFFSET 0xc0 131 #define CDNS_PCIE_EP_FUNC_SRIOV_CAP_OFFSET 0x200 132 133 /* 134 * Endpoint PF Registers 135 */ 136 #define CDNS_PCIE_CORE_PF_I_ARI_CAP_AND_CTRL(fn) (0x144 + (fn) * 0x1000) 137 #define CDNS_PCIE_ARI_CAP_NFN_MASK GENMASK(15, 8) 138 139 /* 140 * Root Port Registers (PCI configuration space for the root port function) 141 */ 142 #define CDNS_PCIE_RP_BASE 0x00200000 143 #define CDNS_PCIE_RP_CAP_OFFSET 0xc0 144 145 /* 146 * Address Translation Registers 147 */ 148 #define CDNS_PCIE_AT_BASE 0x00400000 149 150 /* Region r Outbound AXI to PCIe Address Translation Register 0 */ 151 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0(r) \ 152 (CDNS_PCIE_AT_BASE + 0x0000 + ((r) & 0x1f) * 0x0020) 153 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK GENMASK(5, 0) 154 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS(nbits) \ 155 (((nbits) - 1) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK) 156 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK GENMASK(19, 12) 157 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN(devfn) \ 158 (((devfn) << 12) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK) 159 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK GENMASK(27, 20) 160 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS(bus) \ 161 (((bus) << 20) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK) 162 163 /* Region r Outbound AXI to PCIe Address Translation Register 1 */ 164 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR1(r) \ 165 (CDNS_PCIE_AT_BASE + 0x0004 + ((r) & 0x1f) * 0x0020) 166 167 /* Region r Outbound PCIe Descriptor Register 0 */ 168 #define CDNS_PCIE_AT_OB_REGION_DESC0(r) \ 169 (CDNS_PCIE_AT_BASE + 0x0008 + ((r) & 0x1f) * 0x0020) 170 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MASK GENMASK(3, 0) 171 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MEM 0x2 172 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_IO 0x6 173 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE0 0xa 174 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE1 0xb 175 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_NORMAL_MSG 0xc 176 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_VENDOR_MSG 0xd 177 /* Bit 23 MUST be set in RC mode. */ 178 #define CDNS_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID BIT(23) 179 #define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK GENMASK(31, 24) 180 #define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN(devfn) \ 181 (((devfn) << 24) & CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK) 182 183 /* Region r Outbound PCIe Descriptor Register 1 */ 184 #define CDNS_PCIE_AT_OB_REGION_DESC1(r) \ 185 (CDNS_PCIE_AT_BASE + 0x000c + ((r) & 0x1f) * 0x0020) 186 #define CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK GENMASK(7, 0) 187 #define CDNS_PCIE_AT_OB_REGION_DESC1_BUS(bus) \ 188 ((bus) & CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK) 189 190 /* Region r AXI Region Base Address Register 0 */ 191 #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r) \ 192 (CDNS_PCIE_AT_BASE + 0x0018 + ((r) & 0x1f) * 0x0020) 193 #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK GENMASK(5, 0) 194 #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(nbits) \ 195 (((nbits) - 1) & CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK) 196 197 /* Region r AXI Region Base Address Register 1 */ 198 #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r) \ 199 (CDNS_PCIE_AT_BASE + 0x001c + ((r) & 0x1f) * 0x0020) 200 201 /* Root Port BAR Inbound PCIe to AXI Address Translation Register */ 202 #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0(bar) \ 203 (CDNS_PCIE_AT_BASE + 0x0800 + (bar) * 0x0008) 204 #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK GENMASK(5, 0) 205 #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS(nbits) \ 206 (((nbits) - 1) & CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK) 207 #define CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar) \ 208 (CDNS_PCIE_AT_BASE + 0x0804 + (bar) * 0x0008) 209 210 /* AXI link down register */ 211 #define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824) 212 213 /* LTSSM Capabilities register */ 214 #define CDNS_PCIE_LTSSM_CONTROL_CAP (CDNS_PCIE_LM_BASE + 0x0054) 215 #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK GENMASK(2, 1) 216 #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY_SHIFT 1 217 #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY(delay) \ 218 (((delay) << CDNS_PCIE_DETECT_QUIET_MIN_DELAY_SHIFT) & \ 219 CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK) 220 221 enum cdns_pcie_rp_bar { 222 RP_BAR_UNDEFINED = -1, 223 RP_BAR0, 224 RP_BAR1, 225 RP_NO_BAR 226 }; 227 228 #define CDNS_PCIE_RP_MAX_IB 0x3 229 #define CDNS_PCIE_MAX_OB 32 230 231 struct cdns_pcie_rp_ib_bar { 232 u64 size; 233 bool free; 234 }; 235 236 /* Endpoint Function BAR Inbound PCIe to AXI Address Translation Register */ 237 #define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \ 238 (CDNS_PCIE_AT_BASE + 0x0840 + (fn) * 0x0040 + (bar) * 0x0008) 239 #define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar) \ 240 (CDNS_PCIE_AT_BASE + 0x0844 + (fn) * 0x0040 + (bar) * 0x0008) 241 242 /* Normal/Vendor specific message access: offset inside some outbound region */ 243 #define CDNS_PCIE_NORMAL_MSG_ROUTING_MASK GENMASK(7, 5) 244 #define CDNS_PCIE_NORMAL_MSG_ROUTING(route) \ 245 (((route) << 5) & CDNS_PCIE_NORMAL_MSG_ROUTING_MASK) 246 #define CDNS_PCIE_NORMAL_MSG_CODE_MASK GENMASK(15, 8) 247 #define CDNS_PCIE_NORMAL_MSG_CODE(code) \ 248 (((code) << 8) & CDNS_PCIE_NORMAL_MSG_CODE_MASK) 249 #define CDNS_PCIE_MSG_DATA BIT(16) 250 251 struct cdns_pcie; 252 253 struct cdns_pcie_ops { 254 int (*start_link)(struct cdns_pcie *pcie); 255 void (*stop_link)(struct cdns_pcie *pcie); 256 bool (*link_up)(struct cdns_pcie *pcie); 257 u64 (*cpu_addr_fixup)(struct cdns_pcie *pcie, u64 cpu_addr); 258 }; 259 260 /** 261 * struct cdns_pcie - private data for Cadence PCIe controller drivers 262 * @reg_base: IO mapped register base 263 * @mem_res: start/end offsets in the physical system memory to map PCI accesses 264 * @dev: PCIe controller 265 * @is_rc: tell whether the PCIe controller mode is Root Complex or Endpoint. 266 * @phy_count: number of supported PHY devices 267 * @phy: list of pointers to specific PHY control blocks 268 * @link: list of pointers to corresponding device link representations 269 * @ops: Platform-specific ops to control various inputs from Cadence PCIe 270 * wrapper 271 */ 272 struct cdns_pcie { 273 void __iomem *reg_base; 274 struct resource *mem_res; 275 struct device *dev; 276 bool is_rc; 277 int phy_count; 278 struct phy **phy; 279 struct device_link **link; 280 const struct cdns_pcie_ops *ops; 281 }; 282 283 /** 284 * struct cdns_pcie_rc - private data for this PCIe Root Complex driver 285 * @pcie: Cadence PCIe controller 286 * @cfg_res: start/end offsets in the physical system memory to map PCI 287 * configuration space accesses 288 * @cfg_base: IO mapped window to access the PCI configuration space of a 289 * single function at a time 290 * @vendor_id: PCI vendor ID 291 * @device_id: PCI device ID 292 * @avail_ib_bar: Status of RP_BAR0, RP_BAR1 and RP_NO_BAR if it's free or 293 * available 294 * @quirk_retrain_flag: Retrain link as quirk for PCIe Gen2 295 * @quirk_detect_quiet_flag: LTSSM Detect Quiet min delay set as quirk 296 */ 297 struct cdns_pcie_rc { 298 struct cdns_pcie pcie; 299 struct resource *cfg_res; 300 void __iomem *cfg_base; 301 u32 vendor_id; 302 u32 device_id; 303 bool avail_ib_bar[CDNS_PCIE_RP_MAX_IB]; 304 unsigned int quirk_retrain_flag:1; 305 unsigned int quirk_detect_quiet_flag:1; 306 }; 307 308 /** 309 * struct cdns_pcie_epf - Structure to hold info about endpoint function 310 * @epf: Info about virtual functions attached to the physical function 311 * @epf_bar: reference to the pci_epf_bar for the six Base Address Registers 312 */ 313 struct cdns_pcie_epf { 314 struct cdns_pcie_epf *epf; 315 struct pci_epf_bar *epf_bar[PCI_STD_NUM_BARS]; 316 }; 317 318 /** 319 * struct cdns_pcie_ep - private data for this PCIe endpoint controller driver 320 * @pcie: Cadence PCIe controller 321 * @max_regions: maximum number of regions supported by hardware 322 * @ob_region_map: bitmask of mapped outbound regions 323 * @ob_addr: base addresses in the AXI bus where the outbound regions start 324 * @irq_phys_addr: base address on the AXI bus where the MSI/INTX IRQ 325 * dedicated outbound regions is mapped. 326 * @irq_cpu_addr: base address in the CPU space where a write access triggers 327 * the sending of a memory write (MSI) / normal message (INTX 328 * IRQ) TLP through the PCIe bus. 329 * @irq_pci_addr: used to save the current mapping of the MSI/INTX IRQ 330 * dedicated outbound region. 331 * @irq_pci_fn: the latest PCI function that has updated the mapping of 332 * the MSI/INTX IRQ dedicated outbound region. 333 * @irq_pending: bitmask of asserted INTX IRQs. 334 * @lock: spin lock to disable interrupts while modifying PCIe controller 335 * registers fields (RMW) accessible by both remote RC and EP to 336 * minimize time between read and write 337 * @epf: Structure to hold info about endpoint function 338 * @quirk_detect_quiet_flag: LTSSM Detect Quiet min delay set as quirk 339 * @quirk_disable_flr: Disable FLR (Function Level Reset) quirk flag 340 */ 341 struct cdns_pcie_ep { 342 struct cdns_pcie pcie; 343 u32 max_regions; 344 unsigned long ob_region_map; 345 phys_addr_t *ob_addr; 346 phys_addr_t irq_phys_addr; 347 void __iomem *irq_cpu_addr; 348 u64 irq_pci_addr; 349 u8 irq_pci_fn; 350 u8 irq_pending; 351 /* protect writing to PCI_STATUS while raising INTX interrupts */ 352 spinlock_t lock; 353 struct cdns_pcie_epf *epf; 354 unsigned int quirk_detect_quiet_flag:1; 355 unsigned int quirk_disable_flr:1; 356 }; 357 358 359 /* Register access */ 360 static inline void cdns_pcie_writel(struct cdns_pcie *pcie, u32 reg, u32 value) 361 { 362 writel(value, pcie->reg_base + reg); 363 } 364 365 static inline u32 cdns_pcie_readl(struct cdns_pcie *pcie, u32 reg) 366 { 367 return readl(pcie->reg_base + reg); 368 } 369 370 static inline u32 cdns_pcie_read_sz(void __iomem *addr, int size) 371 { 372 void __iomem *aligned_addr = PTR_ALIGN_DOWN(addr, 0x4); 373 unsigned int offset = (unsigned long)addr & 0x3; 374 u32 val = readl(aligned_addr); 375 376 if (!IS_ALIGNED((uintptr_t)addr, size)) { 377 pr_warn("Address %p and size %d are not aligned\n", addr, size); 378 return 0; 379 } 380 381 if (size > 2) 382 return val; 383 384 return (val >> (8 * offset)) & ((1 << (size * 8)) - 1); 385 } 386 387 static inline void cdns_pcie_write_sz(void __iomem *addr, int size, u32 value) 388 { 389 void __iomem *aligned_addr = PTR_ALIGN_DOWN(addr, 0x4); 390 unsigned int offset = (unsigned long)addr & 0x3; 391 u32 mask; 392 u32 val; 393 394 if (!IS_ALIGNED((uintptr_t)addr, size)) { 395 pr_warn("Address %p and size %d are not aligned\n", addr, size); 396 return; 397 } 398 399 if (size > 2) { 400 writel(value, addr); 401 return; 402 } 403 404 mask = ~(((1 << (size * 8)) - 1) << (offset * 8)); 405 val = readl(aligned_addr) & mask; 406 val |= value << (offset * 8); 407 writel(val, aligned_addr); 408 } 409 410 /* Root Port register access */ 411 static inline void cdns_pcie_rp_writeb(struct cdns_pcie *pcie, 412 u32 reg, u8 value) 413 { 414 void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg; 415 416 cdns_pcie_write_sz(addr, 0x1, value); 417 } 418 419 static inline void cdns_pcie_rp_writew(struct cdns_pcie *pcie, 420 u32 reg, u16 value) 421 { 422 void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg; 423 424 cdns_pcie_write_sz(addr, 0x2, value); 425 } 426 427 static inline u16 cdns_pcie_rp_readw(struct cdns_pcie *pcie, u32 reg) 428 { 429 void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg; 430 431 return cdns_pcie_read_sz(addr, 0x2); 432 } 433 434 /* Endpoint Function register access */ 435 static inline void cdns_pcie_ep_fn_writeb(struct cdns_pcie *pcie, u8 fn, 436 u32 reg, u8 value) 437 { 438 void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg; 439 440 cdns_pcie_write_sz(addr, 0x1, value); 441 } 442 443 static inline void cdns_pcie_ep_fn_writew(struct cdns_pcie *pcie, u8 fn, 444 u32 reg, u16 value) 445 { 446 void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg; 447 448 cdns_pcie_write_sz(addr, 0x2, value); 449 } 450 451 static inline void cdns_pcie_ep_fn_writel(struct cdns_pcie *pcie, u8 fn, 452 u32 reg, u32 value) 453 { 454 writel(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg); 455 } 456 457 static inline u16 cdns_pcie_ep_fn_readw(struct cdns_pcie *pcie, u8 fn, u32 reg) 458 { 459 void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg; 460 461 return cdns_pcie_read_sz(addr, 0x2); 462 } 463 464 static inline u32 cdns_pcie_ep_fn_readl(struct cdns_pcie *pcie, u8 fn, u32 reg) 465 { 466 return readl(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg); 467 } 468 469 static inline int cdns_pcie_start_link(struct cdns_pcie *pcie) 470 { 471 if (pcie->ops->start_link) 472 return pcie->ops->start_link(pcie); 473 474 return 0; 475 } 476 477 static inline void cdns_pcie_stop_link(struct cdns_pcie *pcie) 478 { 479 if (pcie->ops->stop_link) 480 pcie->ops->stop_link(pcie); 481 } 482 483 static inline bool cdns_pcie_link_up(struct cdns_pcie *pcie) 484 { 485 if (pcie->ops->link_up) 486 return pcie->ops->link_up(pcie); 487 488 return true; 489 } 490 491 #if IS_ENABLED(CONFIG_PCIE_CADENCE_HOST) 492 int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc); 493 int cdns_pcie_host_init(struct cdns_pcie_rc *rc); 494 int cdns_pcie_host_setup(struct cdns_pcie_rc *rc); 495 void cdns_pcie_host_disable(struct cdns_pcie_rc *rc); 496 void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn, 497 int where); 498 #else 499 static inline int cdns_pcie_host_link_setup(struct cdns_pcie_rc *rc) 500 { 501 return 0; 502 } 503 504 static inline int cdns_pcie_host_init(struct cdns_pcie_rc *rc) 505 { 506 return 0; 507 } 508 509 static inline int cdns_pcie_host_setup(struct cdns_pcie_rc *rc) 510 { 511 return 0; 512 } 513 514 static inline void cdns_pcie_host_disable(struct cdns_pcie_rc *rc) 515 { 516 } 517 518 static inline void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn, 519 int where) 520 { 521 return NULL; 522 } 523 #endif 524 525 #if IS_ENABLED(CONFIG_PCIE_CADENCE_EP) 526 int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep); 527 void cdns_pcie_ep_disable(struct cdns_pcie_ep *ep); 528 #else 529 static inline int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep) 530 { 531 return 0; 532 } 533 534 static inline void cdns_pcie_ep_disable(struct cdns_pcie_ep *ep) 535 { 536 } 537 #endif 538 539 void cdns_pcie_detect_quiet_min_delay_set(struct cdns_pcie *pcie); 540 541 void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn, 542 u32 r, bool is_io, 543 u64 cpu_addr, u64 pci_addr, size_t size); 544 545 void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie, 546 u8 busnr, u8 fn, 547 u32 r, u64 cpu_addr); 548 549 void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r); 550 void cdns_pcie_disable_phy(struct cdns_pcie *pcie); 551 int cdns_pcie_enable_phy(struct cdns_pcie *pcie); 552 int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie); 553 extern const struct dev_pm_ops cdns_pcie_pm_ops; 554 555 #endif /* _PCIE_CADENCE_H */ 556