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 Requestor 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 * Root Port Registers (PCI configuration space for the root port function)
135 */
136 #define CDNS_PCIE_RP_BASE 0x00200000
137 #define CDNS_PCIE_RP_CAP_OFFSET 0xc0
138
139 /*
140 * Address Translation Registers
141 */
142 #define CDNS_PCIE_AT_BASE 0x00400000
143
144 /* Region r Outbound AXI to PCIe Address Translation Register 0 */
145 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0(r) \
146 (CDNS_PCIE_AT_BASE + 0x0000 + ((r) & 0x1f) * 0x0020)
147 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK GENMASK(5, 0)
148 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS(nbits) \
149 (((nbits) - 1) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_NBITS_MASK)
150 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK GENMASK(19, 12)
151 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN(devfn) \
152 (((devfn) << 12) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK)
153 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK GENMASK(27, 20)
154 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS(bus) \
155 (((bus) << 20) & CDNS_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK)
156
157 /* Region r Outbound AXI to PCIe Address Translation Register 1 */
158 #define CDNS_PCIE_AT_OB_REGION_PCI_ADDR1(r) \
159 (CDNS_PCIE_AT_BASE + 0x0004 + ((r) & 0x1f) * 0x0020)
160
161 /* Region r Outbound PCIe Descriptor Register 0 */
162 #define CDNS_PCIE_AT_OB_REGION_DESC0(r) \
163 (CDNS_PCIE_AT_BASE + 0x0008 + ((r) & 0x1f) * 0x0020)
164 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MASK GENMASK(3, 0)
165 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_MEM 0x2
166 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_IO 0x6
167 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE0 0xa
168 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_CONF_TYPE1 0xb
169 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_NORMAL_MSG 0xc
170 #define CDNS_PCIE_AT_OB_REGION_DESC0_TYPE_VENDOR_MSG 0xd
171 /* Bit 23 MUST be set in RC mode. */
172 #define CDNS_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID BIT(23)
173 #define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK GENMASK(31, 24)
174 #define CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN(devfn) \
175 (((devfn) << 24) & CDNS_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK)
176
177 /* Region r Outbound PCIe Descriptor Register 1 */
178 #define CDNS_PCIE_AT_OB_REGION_DESC1(r) \
179 (CDNS_PCIE_AT_BASE + 0x000c + ((r) & 0x1f) * 0x0020)
180 #define CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK GENMASK(7, 0)
181 #define CDNS_PCIE_AT_OB_REGION_DESC1_BUS(bus) \
182 ((bus) & CDNS_PCIE_AT_OB_REGION_DESC1_BUS_MASK)
183
184 /* Region r AXI Region Base Address Register 0 */
185 #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0(r) \
186 (CDNS_PCIE_AT_BASE + 0x0018 + ((r) & 0x1f) * 0x0020)
187 #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK GENMASK(5, 0)
188 #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS(nbits) \
189 (((nbits) - 1) & CDNS_PCIE_AT_OB_REGION_CPU_ADDR0_NBITS_MASK)
190
191 /* Region r AXI Region Base Address Register 1 */
192 #define CDNS_PCIE_AT_OB_REGION_CPU_ADDR1(r) \
193 (CDNS_PCIE_AT_BASE + 0x001c + ((r) & 0x1f) * 0x0020)
194
195 /* Root Port BAR Inbound PCIe to AXI Address Translation Register */
196 #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0(bar) \
197 (CDNS_PCIE_AT_BASE + 0x0800 + (bar) * 0x0008)
198 #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK GENMASK(5, 0)
199 #define CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS(nbits) \
200 (((nbits) - 1) & CDNS_PCIE_AT_IB_RP_BAR_ADDR0_NBITS_MASK)
201 #define CDNS_PCIE_AT_IB_RP_BAR_ADDR1(bar) \
202 (CDNS_PCIE_AT_BASE + 0x0804 + (bar) * 0x0008)
203
204 /* AXI link down register */
205 #define CDNS_PCIE_AT_LINKDOWN (CDNS_PCIE_AT_BASE + 0x0824)
206
207 /* LTSSM Capabilities register */
208 #define CDNS_PCIE_LTSSM_CONTROL_CAP (CDNS_PCIE_LM_BASE + 0x0054)
209 #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK GENMASK(2, 1)
210 #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY_SHIFT 1
211 #define CDNS_PCIE_DETECT_QUIET_MIN_DELAY(delay) \
212 (((delay) << CDNS_PCIE_DETECT_QUIET_MIN_DELAY_SHIFT) & \
213 CDNS_PCIE_DETECT_QUIET_MIN_DELAY_MASK)
214
215 enum cdns_pcie_rp_bar {
216 RP_BAR_UNDEFINED = -1,
217 RP_BAR0,
218 RP_BAR1,
219 RP_NO_BAR
220 };
221
222 #define CDNS_PCIE_RP_MAX_IB 0x3
223 #define CDNS_PCIE_MAX_OB 32
224
225 struct cdns_pcie_rp_ib_bar {
226 u64 size;
227 bool free;
228 };
229
230 /* Endpoint Function BAR Inbound PCIe to AXI Address Translation Register */
231 #define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \
232 (CDNS_PCIE_AT_BASE + 0x0840 + (fn) * 0x0040 + (bar) * 0x0008)
233 #define CDNS_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar) \
234 (CDNS_PCIE_AT_BASE + 0x0844 + (fn) * 0x0040 + (bar) * 0x0008)
235
236 /* Normal/Vendor specific message access: offset inside some outbound region */
237 #define CDNS_PCIE_NORMAL_MSG_ROUTING_MASK GENMASK(7, 5)
238 #define CDNS_PCIE_NORMAL_MSG_ROUTING(route) \
239 (((route) << 5) & CDNS_PCIE_NORMAL_MSG_ROUTING_MASK)
240 #define CDNS_PCIE_NORMAL_MSG_CODE_MASK GENMASK(15, 8)
241 #define CDNS_PCIE_NORMAL_MSG_CODE(code) \
242 (((code) << 8) & CDNS_PCIE_NORMAL_MSG_CODE_MASK)
243 #define CDNS_PCIE_MSG_NO_DATA BIT(16)
244
245 struct cdns_pcie;
246
247 enum cdns_pcie_msg_code {
248 MSG_CODE_ASSERT_INTA = 0x20,
249 MSG_CODE_ASSERT_INTB = 0x21,
250 MSG_CODE_ASSERT_INTC = 0x22,
251 MSG_CODE_ASSERT_INTD = 0x23,
252 MSG_CODE_DEASSERT_INTA = 0x24,
253 MSG_CODE_DEASSERT_INTB = 0x25,
254 MSG_CODE_DEASSERT_INTC = 0x26,
255 MSG_CODE_DEASSERT_INTD = 0x27,
256 };
257
258 enum cdns_pcie_msg_routing {
259 /* Route to Root Complex */
260 MSG_ROUTING_TO_RC,
261
262 /* Use Address Routing */
263 MSG_ROUTING_BY_ADDR,
264
265 /* Use ID Routing */
266 MSG_ROUTING_BY_ID,
267
268 /* Route as Broadcast Message from Root Complex */
269 MSG_ROUTING_BCAST,
270
271 /* Local message; terminate at receiver (INTx messages) */
272 MSG_ROUTING_LOCAL,
273
274 /* Gather & route to Root Complex (PME_TO_Ack message) */
275 MSG_ROUTING_GATHER,
276 };
277
278 struct cdns_pcie_ops {
279 int (*start_link)(struct cdns_pcie *pcie);
280 void (*stop_link)(struct cdns_pcie *pcie);
281 bool (*link_up)(struct cdns_pcie *pcie);
282 u64 (*cpu_addr_fixup)(struct cdns_pcie *pcie, u64 cpu_addr);
283 };
284
285 /**
286 * struct cdns_pcie - private data for Cadence PCIe controller drivers
287 * @reg_base: IO mapped register base
288 * @mem_res: start/end offsets in the physical system memory to map PCI accesses
289 * @dev: PCIe controller
290 * @is_rc: tell whether the PCIe controller mode is Root Complex or Endpoint.
291 * @phy_count: number of supported PHY devices
292 * @phy: list of pointers to specific PHY control blocks
293 * @link: list of pointers to corresponding device link representations
294 * @ops: Platform-specific ops to control various inputs from Cadence PCIe
295 * wrapper
296 */
297 struct cdns_pcie {
298 void __iomem *reg_base;
299 struct resource *mem_res;
300 struct device *dev;
301 bool is_rc;
302 int phy_count;
303 struct phy **phy;
304 struct device_link **link;
305 const struct cdns_pcie_ops *ops;
306 };
307
308 /**
309 * struct cdns_pcie_rc - private data for this PCIe Root Complex driver
310 * @pcie: Cadence PCIe controller
311 * @dev: pointer to PCIe device
312 * @cfg_res: start/end offsets in the physical system memory to map PCI
313 * configuration space accesses
314 * @cfg_base: IO mapped window to access the PCI configuration space of a
315 * single function at a time
316 * @vendor_id: PCI vendor ID
317 * @device_id: PCI device ID
318 * @avail_ib_bar: Status of RP_BAR0, RP_BAR1 and RP_NO_BAR if it's free or
319 * available
320 * @quirk_retrain_flag: Retrain link as quirk for PCIe Gen2
321 * @quirk_detect_quiet_flag: LTSSM Detect Quiet min delay set as quirk
322 */
323 struct cdns_pcie_rc {
324 struct cdns_pcie pcie;
325 struct resource *cfg_res;
326 void __iomem *cfg_base;
327 u32 vendor_id;
328 u32 device_id;
329 bool avail_ib_bar[CDNS_PCIE_RP_MAX_IB];
330 unsigned int quirk_retrain_flag:1;
331 unsigned int quirk_detect_quiet_flag:1;
332 };
333
334 /**
335 * struct cdns_pcie_epf - Structure to hold info about endpoint function
336 * @epf: Info about virtual functions attached to the physical function
337 * @epf_bar: reference to the pci_epf_bar for the six Base Address Registers
338 */
339 struct cdns_pcie_epf {
340 struct cdns_pcie_epf *epf;
341 struct pci_epf_bar *epf_bar[PCI_STD_NUM_BARS];
342 };
343
344 /**
345 * struct cdns_pcie_ep - private data for this PCIe endpoint controller driver
346 * @pcie: Cadence PCIe controller
347 * @max_regions: maximum number of regions supported by hardware
348 * @ob_region_map: bitmask of mapped outbound regions
349 * @ob_addr: base addresses in the AXI bus where the outbound regions start
350 * @irq_phys_addr: base address on the AXI bus where the MSI/legacy IRQ
351 * dedicated outbound regions is mapped.
352 * @irq_cpu_addr: base address in the CPU space where a write access triggers
353 * the sending of a memory write (MSI) / normal message (legacy
354 * IRQ) TLP through the PCIe bus.
355 * @irq_pci_addr: used to save the current mapping of the MSI/legacy IRQ
356 * dedicated outbound region.
357 * @irq_pci_fn: the latest PCI function that has updated the mapping of
358 * the MSI/legacy IRQ dedicated outbound region.
359 * @irq_pending: bitmask of asserted legacy IRQs.
360 * @lock: spin lock to disable interrupts while modifying PCIe controller
361 * registers fields (RMW) accessible by both remote RC and EP to
362 * minimize time between read and write
363 * @epf: Structure to hold info about endpoint function
364 * @quirk_detect_quiet_flag: LTSSM Detect Quiet min delay set as quirk
365 * @quirk_disable_flr: Disable FLR (Function Level Reset) quirk flag
366 */
367 struct cdns_pcie_ep {
368 struct cdns_pcie pcie;
369 u32 max_regions;
370 unsigned long ob_region_map;
371 phys_addr_t *ob_addr;
372 phys_addr_t irq_phys_addr;
373 void __iomem *irq_cpu_addr;
374 u64 irq_pci_addr;
375 u8 irq_pci_fn;
376 u8 irq_pending;
377 /* protect writing to PCI_STATUS while raising legacy interrupts */
378 spinlock_t lock;
379 struct cdns_pcie_epf *epf;
380 unsigned int quirk_detect_quiet_flag:1;
381 unsigned int quirk_disable_flr:1;
382 };
383
384
385 /* Register access */
cdns_pcie_writel(struct cdns_pcie * pcie,u32 reg,u32 value)386 static inline void cdns_pcie_writel(struct cdns_pcie *pcie, u32 reg, u32 value)
387 {
388 writel(value, pcie->reg_base + reg);
389 }
390
cdns_pcie_readl(struct cdns_pcie * pcie,u32 reg)391 static inline u32 cdns_pcie_readl(struct cdns_pcie *pcie, u32 reg)
392 {
393 return readl(pcie->reg_base + reg);
394 }
395
cdns_pcie_read_sz(void __iomem * addr,int size)396 static inline u32 cdns_pcie_read_sz(void __iomem *addr, int size)
397 {
398 void __iomem *aligned_addr = PTR_ALIGN_DOWN(addr, 0x4);
399 unsigned int offset = (unsigned long)addr & 0x3;
400 u32 val = readl(aligned_addr);
401
402 if (!IS_ALIGNED((uintptr_t)addr, size)) {
403 pr_warn("Address %p and size %d are not aligned\n", addr, size);
404 return 0;
405 }
406
407 if (size > 2)
408 return val;
409
410 return (val >> (8 * offset)) & ((1 << (size * 8)) - 1);
411 }
412
cdns_pcie_write_sz(void __iomem * addr,int size,u32 value)413 static inline void cdns_pcie_write_sz(void __iomem *addr, int size, u32 value)
414 {
415 void __iomem *aligned_addr = PTR_ALIGN_DOWN(addr, 0x4);
416 unsigned int offset = (unsigned long)addr & 0x3;
417 u32 mask;
418 u32 val;
419
420 if (!IS_ALIGNED((uintptr_t)addr, size)) {
421 pr_warn("Address %p and size %d are not aligned\n", addr, size);
422 return;
423 }
424
425 if (size > 2) {
426 writel(value, addr);
427 return;
428 }
429
430 mask = ~(((1 << (size * 8)) - 1) << (offset * 8));
431 val = readl(aligned_addr) & mask;
432 val |= value << (offset * 8);
433 writel(val, aligned_addr);
434 }
435
436 /* Root Port register access */
cdns_pcie_rp_writeb(struct cdns_pcie * pcie,u32 reg,u8 value)437 static inline void cdns_pcie_rp_writeb(struct cdns_pcie *pcie,
438 u32 reg, u8 value)
439 {
440 void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg;
441
442 cdns_pcie_write_sz(addr, 0x1, value);
443 }
444
cdns_pcie_rp_writew(struct cdns_pcie * pcie,u32 reg,u16 value)445 static inline void cdns_pcie_rp_writew(struct cdns_pcie *pcie,
446 u32 reg, u16 value)
447 {
448 void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg;
449
450 cdns_pcie_write_sz(addr, 0x2, value);
451 }
452
cdns_pcie_rp_readw(struct cdns_pcie * pcie,u32 reg)453 static inline u16 cdns_pcie_rp_readw(struct cdns_pcie *pcie, u32 reg)
454 {
455 void __iomem *addr = pcie->reg_base + CDNS_PCIE_RP_BASE + reg;
456
457 return cdns_pcie_read_sz(addr, 0x2);
458 }
459
460 /* Endpoint Function register access */
cdns_pcie_ep_fn_writeb(struct cdns_pcie * pcie,u8 fn,u32 reg,u8 value)461 static inline void cdns_pcie_ep_fn_writeb(struct cdns_pcie *pcie, u8 fn,
462 u32 reg, u8 value)
463 {
464 void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg;
465
466 cdns_pcie_write_sz(addr, 0x1, value);
467 }
468
cdns_pcie_ep_fn_writew(struct cdns_pcie * pcie,u8 fn,u32 reg,u16 value)469 static inline void cdns_pcie_ep_fn_writew(struct cdns_pcie *pcie, u8 fn,
470 u32 reg, u16 value)
471 {
472 void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg;
473
474 cdns_pcie_write_sz(addr, 0x2, value);
475 }
476
cdns_pcie_ep_fn_writel(struct cdns_pcie * pcie,u8 fn,u32 reg,u32 value)477 static inline void cdns_pcie_ep_fn_writel(struct cdns_pcie *pcie, u8 fn,
478 u32 reg, u32 value)
479 {
480 writel(value, pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
481 }
482
cdns_pcie_ep_fn_readw(struct cdns_pcie * pcie,u8 fn,u32 reg)483 static inline u16 cdns_pcie_ep_fn_readw(struct cdns_pcie *pcie, u8 fn, u32 reg)
484 {
485 void __iomem *addr = pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg;
486
487 return cdns_pcie_read_sz(addr, 0x2);
488 }
489
cdns_pcie_ep_fn_readl(struct cdns_pcie * pcie,u8 fn,u32 reg)490 static inline u32 cdns_pcie_ep_fn_readl(struct cdns_pcie *pcie, u8 fn, u32 reg)
491 {
492 return readl(pcie->reg_base + CDNS_PCIE_EP_FUNC_BASE(fn) + reg);
493 }
494
cdns_pcie_start_link(struct cdns_pcie * pcie)495 static inline int cdns_pcie_start_link(struct cdns_pcie *pcie)
496 {
497 if (pcie->ops->start_link)
498 return pcie->ops->start_link(pcie);
499
500 return 0;
501 }
502
cdns_pcie_stop_link(struct cdns_pcie * pcie)503 static inline void cdns_pcie_stop_link(struct cdns_pcie *pcie)
504 {
505 if (pcie->ops->stop_link)
506 pcie->ops->stop_link(pcie);
507 }
508
cdns_pcie_link_up(struct cdns_pcie * pcie)509 static inline bool cdns_pcie_link_up(struct cdns_pcie *pcie)
510 {
511 if (pcie->ops->link_up)
512 return pcie->ops->link_up(pcie);
513
514 return true;
515 }
516
517 #ifdef CONFIG_PCIE_CADENCE_HOST
518 int cdns_pcie_host_setup(struct cdns_pcie_rc *rc);
519 void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
520 int where);
521 #else
cdns_pcie_host_setup(struct cdns_pcie_rc * rc)522 static inline int cdns_pcie_host_setup(struct cdns_pcie_rc *rc)
523 {
524 return 0;
525 }
526
cdns_pci_map_bus(struct pci_bus * bus,unsigned int devfn,int where)527 static inline void __iomem *cdns_pci_map_bus(struct pci_bus *bus, unsigned int devfn,
528 int where)
529 {
530 return NULL;
531 }
532 #endif
533
534 #ifdef CONFIG_PCIE_CADENCE_EP
535 int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep);
536 #else
cdns_pcie_ep_setup(struct cdns_pcie_ep * ep)537 static inline int cdns_pcie_ep_setup(struct cdns_pcie_ep *ep)
538 {
539 return 0;
540 }
541 #endif
542
543 void cdns_pcie_detect_quiet_min_delay_set(struct cdns_pcie *pcie);
544
545 void cdns_pcie_set_outbound_region(struct cdns_pcie *pcie, u8 busnr, u8 fn,
546 u32 r, bool is_io,
547 u64 cpu_addr, u64 pci_addr, size_t size);
548
549 void cdns_pcie_set_outbound_region_for_normal_msg(struct cdns_pcie *pcie,
550 u8 busnr, u8 fn,
551 u32 r, u64 cpu_addr);
552
553 void cdns_pcie_reset_outbound_region(struct cdns_pcie *pcie, u32 r);
554 void cdns_pcie_disable_phy(struct cdns_pcie *pcie);
555 int cdns_pcie_enable_phy(struct cdns_pcie *pcie);
556 int cdns_pcie_init_phy(struct device *dev, struct cdns_pcie *pcie);
557 extern const struct dev_pm_ops cdns_pcie_pm_ops;
558
559 #endif /* _PCIE_CADENCE_H */
560