forked from openwrt/openwrt
-
-
Notifications
You must be signed in to change notification settings - Fork 5
/
812-pcie-0009-PCI-mobiveil-Refactor-Mobiveil-PCIe-Host-Bridge-IP-d.patch
2184 lines (2176 loc) · 61.9 KB
/
812-pcie-0009-PCI-mobiveil-Refactor-Mobiveil-PCIe-Host-Bridge-IP-d.patch
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
From ab6a07d577dbd45d00a1738a6b5a28a6666be754 Mon Sep 17 00:00:00 2001
From: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Date: Tue, 25 Jun 2019 09:09:07 +0000
Subject: [PATCH] PCI: mobiveil: Refactor Mobiveil PCIe Host Bridge IP driver
Refactor the Mobiveil PCIe Host Bridge IP driver to make
it easier to add support for both RC and EP mode driver.
This patch moved the Mobiveil driver to an new directory
'drivers/pci/controller/mobiveil' and refactor it according
to the RC and EP abstraction.
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: Minghuan Lian <Minghuan.Lian@nxp.com>
Reviewed-by: Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>
---
MAINTAINERS | 2 +-
drivers/pci/controller/Kconfig | 11 +-
drivers/pci/controller/Makefile | 2 +-
drivers/pci/controller/mobiveil/Kconfig | 24 +
drivers/pci/controller/mobiveil/Makefile | 4 +
.../pci/controller/mobiveil/pcie-mobiveil-host.c | 611 +++++++++++++
.../pci/controller/mobiveil/pcie-mobiveil-plat.c | 59 ++
drivers/pci/controller/mobiveil/pcie-mobiveil.c | 227 +++++
drivers/pci/controller/mobiveil/pcie-mobiveil.h | 189 ++++
drivers/pci/controller/pcie-mobiveil.c | 964 ---------------------
10 files changed, 1117 insertions(+), 976 deletions(-)
create mode 100644 drivers/pci/controller/mobiveil/Kconfig
create mode 100644 drivers/pci/controller/mobiveil/Makefile
create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.c
create mode 100644 drivers/pci/controller/mobiveil/pcie-mobiveil.h
delete mode 100644 drivers/pci/controller/pcie-mobiveil.c
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -12502,7 +12502,7 @@ M: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
L: linux-pci@vger.kernel.org
S: Supported
F: Documentation/devicetree/bindings/pci/mobiveil-pcie.txt
-F: drivers/pci/controller/pcie-mobiveil.c
+F: drivers/pci/controller/mobiveil/pcie-mobiveil*
PCI DRIVER FOR MVEBU (Marvell Armada 370 and Armada XP SOC support)
M: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
--- a/drivers/pci/controller/Kconfig
+++ b/drivers/pci/controller/Kconfig
@@ -241,16 +241,6 @@ config PCIE_MEDIATEK
Say Y here if you want to enable PCIe controller support on
MediaTek SoCs.
-config PCIE_MOBIVEIL
- bool "Mobiveil AXI PCIe controller"
- depends on ARCH_ZYNQMP || COMPILE_TEST
- depends on OF
- depends on PCI_MSI_IRQ_DOMAIN
- help
- Say Y here if you want to enable support for the Mobiveil AXI PCIe
- Soft IP. It has up to 8 outbound and inbound windows
- for address translation and it is a PCIe Gen4 IP.
-
config PCIE_TANGO_SMP8759
bool "Tango SMP8759 PCIe controller (DANGEROUS)"
depends on ARCH_TANGO && PCI_MSI && OF
@@ -289,4 +279,5 @@ config PCI_HYPERV_INTERFACE
have a common interface with the Hyper-V PCI frontend driver.
source "drivers/pci/controller/dwc/Kconfig"
+source "drivers/pci/controller/mobiveil/Kconfig"
endmenu
--- a/drivers/pci/controller/Makefile
+++ b/drivers/pci/controller/Makefile
@@ -27,11 +27,11 @@ obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rock
obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o
obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
-obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
obj-$(CONFIG_VMD) += vmd.o
# pcie-hisi.o quirks are needed even without CONFIG_PCIE_DW
obj-y += dwc/
+obj-y += mobiveil/
# The following drivers are for devices that use the generic ACPI
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/Kconfig
@@ -0,0 +1,24 @@
+# SPDX-License-Identifier: GPL-2.0
+
+menu "Mobiveil PCIe Core Support"
+ depends on PCI
+
+config PCIE_MOBIVEIL
+ bool
+
+config PCIE_MOBIVEIL_HOST
+ bool
+ depends on PCI_MSI_IRQ_DOMAIN
+ select PCIE_MOBIVEIL
+
+config PCIE_MOBIVEIL_PLAT
+ bool "Mobiveil AXI PCIe controller"
+ depends on ARCH_ZYNQMP || COMPILE_TEST
+ depends on OF
+ select PCIE_MOBIVEIL_HOST
+ help
+ Say Y here if you want to enable support for the Mobiveil AXI PCIe
+ Soft IP. It has up to 8 outbound and inbound windows
+ for address translation and it is a PCIe Gen4 IP.
+
+endmenu
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PCIE_MOBIVEIL) += pcie-mobiveil.o
+obj-$(CONFIG_PCIE_MOBIVEIL_HOST) += pcie-mobiveil-host.o
+obj-$(CONFIG_PCIE_MOBIVEIL_PLAT) += pcie-mobiveil-plat.o
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-host.c
@@ -0,0 +1,611 @@
+// 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>
+ * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/msi.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+#include <linux/of_pci.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "pcie-mobiveil.h"
+
+static bool mobiveil_pcie_valid_device(struct pci_bus *bus, unsigned int devfn)
+{
+ struct mobiveil_pcie *pcie = bus->sysdata;
+
+ /* Only one device down on each root port */
+ if ((bus->number == pcie->rp.root_bus_nr) && (devfn > 0))
+ return false;
+
+ /*
+ * Do not read more than one device on the bus directly
+ * attached to RC
+ */
+ if ((bus->primary == pcie->rp.root_bus_nr) && (PCI_SLOT(devfn) > 0))
+ return false;
+
+ return true;
+}
+
+/*
+ * mobiveil_pcie_map_bus - routine to get the configuration base of either
+ * root port or endpoint
+ */
+static void __iomem *mobiveil_pcie_map_bus(struct pci_bus *bus,
+ unsigned int devfn, int where)
+{
+ struct mobiveil_pcie *pcie = bus->sysdata;
+ u32 value;
+
+ if (!mobiveil_pcie_valid_device(bus, devfn))
+ return NULL;
+
+ /* RC config access */
+ if (bus->number == pcie->rp.root_bus_nr)
+ return pcie->csr_axi_slave_base + where;
+
+ /*
+ * EP config access (in Config/APIO space)
+ * Program PEX Address base (31..16 bits) with appropriate value
+ * (BDF) in PAB_AXI_AMAP_PEX_WIN_L0 Register.
+ * Relies on pci_lock serialization
+ */
+ value = bus->number << PAB_BUS_SHIFT |
+ PCI_SLOT(devfn) << PAB_DEVICE_SHIFT |
+ PCI_FUNC(devfn) << PAB_FUNCTION_SHIFT;
+
+ csr_writel(pcie, value, PAB_AXI_AMAP_PEX_WIN_L(WIN_NUM_0));
+
+ return pcie->rp.config_axi_slave_base + where;
+}
+
+static struct pci_ops mobiveil_pcie_ops = {
+ .map_bus = mobiveil_pcie_map_bus,
+ .read = pci_generic_config_read,
+ .write = pci_generic_config_write,
+};
+
+static void mobiveil_pcie_isr(struct irq_desc *desc)
+{
+ struct irq_chip *chip = irq_desc_get_chip(desc);
+ struct mobiveil_pcie *pcie = irq_desc_get_handler_data(desc);
+ struct device *dev = &pcie->pdev->dev;
+ struct mobiveil_msi *msi = &pcie->rp.msi;
+ u32 msi_data, msi_addr_lo, msi_addr_hi;
+ u32 intr_status, msi_status;
+ unsigned long shifted_status;
+ u32 bit, virq, val, mask;
+
+ /*
+ * The core provides a single interrupt for both INTx/MSI messages.
+ * So we'll read both INTx and MSI status
+ */
+
+ chained_irq_enter(chip, desc);
+
+ /* read INTx status */
+ val = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT);
+ mask = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
+ intr_status = val & mask;
+
+ /* Handle INTx */
+ if (intr_status & PAB_INTP_INTX_MASK) {
+ shifted_status = csr_readl(pcie, PAB_INTP_AMBA_MISC_STAT);
+ shifted_status &= PAB_INTP_INTX_MASK;
+ shifted_status >>= PAB_INTX_START;
+ do {
+ for_each_set_bit(bit, &shifted_status, PCI_NUM_INTX) {
+ virq = irq_find_mapping(pcie->rp.intx_domain,
+ bit + 1);
+ if (virq)
+ generic_handle_irq(virq);
+ else
+ dev_err_ratelimited(dev, "unexpected IRQ, INT%d\n",
+ bit);
+
+ /* clear interrupt handled */
+ csr_writel(pcie, 1 << (PAB_INTX_START + bit),
+ PAB_INTP_AMBA_MISC_STAT);
+ }
+
+ shifted_status = csr_readl(pcie,
+ PAB_INTP_AMBA_MISC_STAT);
+ shifted_status &= PAB_INTP_INTX_MASK;
+ shifted_status >>= PAB_INTX_START;
+ } while (shifted_status != 0);
+ }
+
+ /* read extra MSI status register */
+ msi_status = readl_relaxed(pcie->apb_csr_base + MSI_STATUS_OFFSET);
+
+ /* handle MSI interrupts */
+ while (msi_status & 1) {
+ msi_data = readl_relaxed(pcie->apb_csr_base + MSI_DATA_OFFSET);
+
+ /*
+ * MSI_STATUS_OFFSET register gets updated to zero
+ * once we pop not only the MSI data but also address
+ * from MSI hardware FIFO. So keeping these following
+ * two dummy reads.
+ */
+ msi_addr_lo = readl_relaxed(pcie->apb_csr_base +
+ MSI_ADDR_L_OFFSET);
+ msi_addr_hi = readl_relaxed(pcie->apb_csr_base +
+ MSI_ADDR_H_OFFSET);
+ dev_dbg(dev, "MSI registers, data: %08x, addr: %08x:%08x\n",
+ msi_data, msi_addr_hi, msi_addr_lo);
+
+ virq = irq_find_mapping(msi->dev_domain, msi_data);
+ if (virq)
+ generic_handle_irq(virq);
+
+ msi_status = readl_relaxed(pcie->apb_csr_base +
+ MSI_STATUS_OFFSET);
+ }
+
+ /* Clear the interrupt status */
+ csr_writel(pcie, intr_status, PAB_INTP_AMBA_MISC_STAT);
+ chained_irq_exit(chip, desc);
+}
+
+static int mobiveil_pcie_parse_dt(struct mobiveil_pcie *pcie)
+{
+ struct device *dev = &pcie->pdev->dev;
+ struct platform_device *pdev = pcie->pdev;
+ struct device_node *node = dev->of_node;
+ struct resource *res;
+
+ /* map config resource */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "config_axi_slave");
+ pcie->rp.config_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
+ if (IS_ERR(pcie->rp.config_axi_slave_base))
+ return PTR_ERR(pcie->rp.config_axi_slave_base);
+ pcie->rp.ob_io_res = res;
+
+ /* map csr resource */
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "csr_axi_slave");
+ pcie->csr_axi_slave_base = devm_pci_remap_cfg_resource(dev, res);
+ if (IS_ERR(pcie->csr_axi_slave_base))
+ return PTR_ERR(pcie->csr_axi_slave_base);
+ pcie->pcie_reg_base = res->start;
+
+ /* read the number of windows requested */
+ if (of_property_read_u32(node, "apio-wins", &pcie->apio_wins))
+ pcie->apio_wins = MAX_PIO_WINDOWS;
+
+ if (of_property_read_u32(node, "ppio-wins", &pcie->ppio_wins))
+ pcie->ppio_wins = MAX_PIO_WINDOWS;
+
+ return 0;
+}
+
+static void mobiveil_pcie_enable_msi(struct mobiveil_pcie *pcie)
+{
+ phys_addr_t msg_addr = pcie->pcie_reg_base;
+ struct mobiveil_msi *msi = &pcie->rp.msi;
+
+ msi->num_of_vectors = PCI_NUM_MSI;
+ msi->msi_pages_phys = (phys_addr_t)msg_addr;
+
+ writel_relaxed(lower_32_bits(msg_addr),
+ pcie->apb_csr_base + MSI_BASE_LO_OFFSET);
+ writel_relaxed(upper_32_bits(msg_addr),
+ pcie->apb_csr_base + MSI_BASE_HI_OFFSET);
+ writel_relaxed(4096, pcie->apb_csr_base + MSI_SIZE_OFFSET);
+ writel_relaxed(1, pcie->apb_csr_base + MSI_ENABLE_OFFSET);
+}
+
+static int mobiveil_host_init(struct mobiveil_pcie *pcie)
+{
+ u32 value, pab_ctrl, type;
+ struct resource_entry *win;
+
+ /* setup bus numbers */
+ value = csr_readl(pcie, PCI_PRIMARY_BUS);
+ value &= 0xff000000;
+ value |= 0x00ff0100;
+ csr_writel(pcie, value, PCI_PRIMARY_BUS);
+
+ /*
+ * program Bus Master Enable Bit in Command Register in PAB Config
+ * Space
+ */
+ value = csr_readl(pcie, PCI_COMMAND);
+ value |= PCI_COMMAND_IO | PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER;
+ csr_writel(pcie, value, PCI_COMMAND);
+
+ /*
+ * program PIO Enable Bit to 1 (and PEX PIO Enable to 1) in PAB_CTRL
+ * register
+ */
+ pab_ctrl = csr_readl(pcie, PAB_CTRL);
+ pab_ctrl |= (1 << AMBA_PIO_ENABLE_SHIFT) | (1 << PEX_PIO_ENABLE_SHIFT);
+ csr_writel(pcie, pab_ctrl, PAB_CTRL);
+
+ /*
+ * program PIO Enable Bit to 1 and Config Window Enable Bit to 1 in
+ * PAB_AXI_PIO_CTRL Register
+ */
+ value = csr_readl(pcie, PAB_AXI_PIO_CTRL);
+ value |= APIO_EN_MASK;
+ csr_writel(pcie, value, PAB_AXI_PIO_CTRL);
+
+ /* Enable PCIe PIO master */
+ value = csr_readl(pcie, PAB_PEX_PIO_CTRL);
+ value |= 1 << PIO_ENABLE_SHIFT;
+ csr_writel(pcie, value, PAB_PEX_PIO_CTRL);
+
+ /*
+ * we'll program one outbound window for config reads and
+ * another default inbound window for all the upstream traffic
+ * rest of the outbound windows will be configured according to
+ * the "ranges" field defined in device tree
+ */
+
+ /* config outbound translation window */
+ program_ob_windows(pcie, WIN_NUM_0, pcie->rp.ob_io_res->start, 0,
+ CFG_WINDOW_TYPE, resource_size(pcie->rp.ob_io_res));
+
+ /* memory inbound translation window */
+ program_ib_windows(pcie, WIN_NUM_0, 0, 0, MEM_WINDOW_TYPE, IB_WIN_SIZE);
+
+ /* Get the I/O and memory ranges from DT */
+ resource_list_for_each_entry(win, &pcie->resources) {
+ if (resource_type(win->res) == IORESOURCE_MEM) {
+ type = MEM_WINDOW_TYPE;
+ } else if (resource_type(win->res) == IORESOURCE_IO) {
+ type = IO_WINDOW_TYPE;
+ } else if (resource_type(win->res) == IORESOURCE_BUS) {
+ pcie->rp.root_bus_nr = win->res->start;
+ continue;
+ } else {
+ continue;
+ }
+
+ /* configure outbound translation window */
+ program_ob_windows(pcie, pcie->ob_wins_configured,
+ win->res->start,
+ win->res->start - win->offset,
+ type, resource_size(win->res));
+ }
+
+ /* fixup for PCIe class register */
+ value = csr_readl(pcie, PAB_INTP_AXI_PIO_CLASS);
+ value &= 0xff;
+ value |= (PCI_CLASS_BRIDGE_PCI << 16);
+ csr_writel(pcie, value, PAB_INTP_AXI_PIO_CLASS);
+
+ return 0;
+}
+
+static void mobiveil_mask_intx_irq(struct irq_data *data)
+{
+ struct irq_desc *desc = irq_to_desc(data->irq);
+ struct mobiveil_pcie *pcie;
+ unsigned long flags;
+ u32 mask, shifted_val;
+
+ pcie = irq_desc_get_chip_data(desc);
+ mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
+ raw_spin_lock_irqsave(&pcie->rp.intx_mask_lock, flags);
+ shifted_val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
+ shifted_val &= ~mask;
+ csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
+ raw_spin_unlock_irqrestore(&pcie->rp.intx_mask_lock, flags);
+}
+
+static void mobiveil_unmask_intx_irq(struct irq_data *data)
+{
+ struct irq_desc *desc = irq_to_desc(data->irq);
+ struct mobiveil_pcie *pcie;
+ unsigned long flags;
+ u32 shifted_val, mask;
+
+ pcie = irq_desc_get_chip_data(desc);
+ mask = 1 << ((data->hwirq + PAB_INTX_START) - 1);
+ raw_spin_lock_irqsave(&pcie->rp.intx_mask_lock, flags);
+ shifted_val = csr_readl(pcie, PAB_INTP_AMBA_MISC_ENB);
+ shifted_val |= mask;
+ csr_writel(pcie, shifted_val, PAB_INTP_AMBA_MISC_ENB);
+ raw_spin_unlock_irqrestore(&pcie->rp.intx_mask_lock, flags);
+}
+
+static struct irq_chip intx_irq_chip = {
+ .name = "mobiveil_pcie:intx",
+ .irq_enable = mobiveil_unmask_intx_irq,
+ .irq_disable = mobiveil_mask_intx_irq,
+ .irq_mask = mobiveil_mask_intx_irq,
+ .irq_unmask = mobiveil_unmask_intx_irq,
+};
+
+/* routine to setup the INTx related data */
+static int mobiveil_pcie_intx_map(struct irq_domain *domain, unsigned int irq,
+ irq_hw_number_t hwirq)
+{
+ irq_set_chip_and_handler(irq, &intx_irq_chip, handle_level_irq);
+ irq_set_chip_data(irq, domain->host_data);
+
+ return 0;
+}
+
+/* INTx domain operations structure */
+static const struct irq_domain_ops intx_domain_ops = {
+ .map = mobiveil_pcie_intx_map,
+};
+
+static struct irq_chip mobiveil_msi_irq_chip = {
+ .name = "Mobiveil PCIe MSI",
+ .irq_mask = pci_msi_mask_irq,
+ .irq_unmask = pci_msi_unmask_irq,
+};
+
+static struct msi_domain_info mobiveil_msi_domain_info = {
+ .flags = (MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
+ MSI_FLAG_PCI_MSIX),
+ .chip = &mobiveil_msi_irq_chip,
+};
+
+static void mobiveil_compose_msi_msg(struct irq_data *data, struct msi_msg *msg)
+{
+ struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(data);
+ phys_addr_t addr = pcie->pcie_reg_base + (data->hwirq * sizeof(int));
+
+ msg->address_lo = lower_32_bits(addr);
+ msg->address_hi = upper_32_bits(addr);
+ msg->data = data->hwirq;
+
+ dev_dbg(&pcie->pdev->dev, "msi#%d address_hi %#x address_lo %#x\n",
+ (int)data->hwirq, msg->address_hi, msg->address_lo);
+}
+
+static int mobiveil_msi_set_affinity(struct irq_data *irq_data,
+ const struct cpumask *mask, bool force)
+{
+ return -EINVAL;
+}
+
+static struct irq_chip mobiveil_msi_bottom_irq_chip = {
+ .name = "Mobiveil MSI",
+ .irq_compose_msi_msg = mobiveil_compose_msi_msg,
+ .irq_set_affinity = mobiveil_msi_set_affinity,
+};
+
+static int mobiveil_irq_msi_domain_alloc(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs, void *args)
+{
+ struct mobiveil_pcie *pcie = domain->host_data;
+ struct mobiveil_msi *msi = &pcie->rp.msi;
+ unsigned long bit;
+
+ WARN_ON(nr_irqs != 1);
+ mutex_lock(&msi->lock);
+
+ bit = find_first_zero_bit(msi->msi_irq_in_use, msi->num_of_vectors);
+ if (bit >= msi->num_of_vectors) {
+ mutex_unlock(&msi->lock);
+ return -ENOSPC;
+ }
+
+ set_bit(bit, msi->msi_irq_in_use);
+
+ mutex_unlock(&msi->lock);
+
+ irq_domain_set_info(domain, virq, bit, &mobiveil_msi_bottom_irq_chip,
+ domain->host_data, handle_level_irq, NULL, NULL);
+ return 0;
+}
+
+static void mobiveil_irq_msi_domain_free(struct irq_domain *domain,
+ unsigned int virq,
+ unsigned int nr_irqs)
+{
+ struct irq_data *d = irq_domain_get_irq_data(domain, virq);
+ struct mobiveil_pcie *pcie = irq_data_get_irq_chip_data(d);
+ struct mobiveil_msi *msi = &pcie->rp.msi;
+
+ mutex_lock(&msi->lock);
+
+ if (!test_bit(d->hwirq, msi->msi_irq_in_use))
+ dev_err(&pcie->pdev->dev, "trying to free unused MSI#%lu\n",
+ d->hwirq);
+ else
+ __clear_bit(d->hwirq, msi->msi_irq_in_use);
+
+ mutex_unlock(&msi->lock);
+}
+static const struct irq_domain_ops msi_domain_ops = {
+ .alloc = mobiveil_irq_msi_domain_alloc,
+ .free = mobiveil_irq_msi_domain_free,
+};
+
+static int mobiveil_allocate_msi_domains(struct mobiveil_pcie *pcie)
+{
+ struct device *dev = &pcie->pdev->dev;
+ struct fwnode_handle *fwnode = of_node_to_fwnode(dev->of_node);
+ struct mobiveil_msi *msi = &pcie->rp.msi;
+
+ mutex_init(&msi->lock);
+ msi->dev_domain = irq_domain_add_linear(NULL, msi->num_of_vectors,
+ &msi_domain_ops, pcie);
+ if (!msi->dev_domain) {
+ dev_err(dev, "failed to create IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ msi->msi_domain = pci_msi_create_irq_domain(fwnode,
+ &mobiveil_msi_domain_info,
+ msi->dev_domain);
+ if (!msi->msi_domain) {
+ dev_err(dev, "failed to create MSI domain\n");
+ irq_domain_remove(msi->dev_domain);
+ return -ENOMEM;
+ }
+
+ return 0;
+}
+
+static int mobiveil_pcie_init_irq_domain(struct mobiveil_pcie *pcie)
+{
+ struct device *dev = &pcie->pdev->dev;
+ struct device_node *node = dev->of_node;
+ int ret;
+
+ /* setup INTx */
+ pcie->rp.intx_domain = irq_domain_add_linear(node, PCI_NUM_INTX,
+ &intx_domain_ops, pcie);
+
+ if (!pcie->rp.intx_domain) {
+ dev_err(dev, "Failed to get a INTx IRQ domain\n");
+ return -ENOMEM;
+ }
+
+ raw_spin_lock_init(&pcie->rp.intx_mask_lock);
+
+ /* setup MSI */
+ ret = mobiveil_allocate_msi_domains(pcie);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int mobiveil_pcie_interrupt_init(struct mobiveil_pcie *pcie)
+{
+ struct device *dev = &pcie->pdev->dev;
+ struct resource *res;
+ int ret;
+
+ if (pcie->rp.ops->interrupt_init)
+ return pcie->rp.ops->interrupt_init(pcie);
+
+ /* map MSI config resource */
+ res = platform_get_resource_byname(pcie->pdev, IORESOURCE_MEM,
+ "apb_csr");
+ pcie->apb_csr_base = devm_pci_remap_cfg_resource(dev, res);
+ if (IS_ERR(pcie->apb_csr_base))
+ return PTR_ERR(pcie->apb_csr_base);
+
+ /* setup MSI hardware registers */
+ mobiveil_pcie_enable_msi(pcie);
+
+ pcie->rp.irq = platform_get_irq(pcie->pdev, 0);
+ if (pcie->rp.irq <= 0) {
+ dev_err(dev, "failed to map IRQ: %d\n", pcie->rp.irq);
+ return -ENODEV;
+ }
+
+ /* initialize the IRQ domains */
+ ret = mobiveil_pcie_init_irq_domain(pcie);
+ if (ret) {
+ dev_err(dev, "Failed creating IRQ Domain\n");
+ return ret;
+ }
+
+ irq_set_chained_handler_and_data(pcie->rp.irq,
+ mobiveil_pcie_isr, pcie);
+
+ /* Enable interrupts */
+ csr_writel(pcie, (PAB_INTP_INTX_MASK | PAB_INTP_MSI_MASK),
+ PAB_INTP_AMBA_MISC_ENB);
+
+ return 0;
+}
+
+int mobiveil_pcie_host_probe(struct mobiveil_pcie *pcie)
+{
+ struct pci_bus *bus;
+ struct pci_bus *child;
+ struct pci_host_bridge *bridge = pcie->bridge;
+ struct device *dev = &pcie->pdev->dev;
+ resource_size_t iobase;
+ int ret;
+
+ INIT_LIST_HEAD(&pcie->resources);
+
+ ret = mobiveil_pcie_parse_dt(pcie);
+ if (ret) {
+ dev_err(dev, "Parsing DT failed, ret: %x\n", ret);
+ return ret;
+ }
+
+ /* parse the host bridge base addresses from the device tree file */
+ ret = devm_of_pci_get_host_bridge_resources(dev, 0, 0xff,
+ &pcie->resources, &iobase);
+ if (ret) {
+ dev_err(dev, "Getting bridge resources failed\n");
+ return ret;
+ }
+
+ /*
+ * configure all inbound and outbound windows and prepare the RC for
+ * config access
+ */
+ ret = mobiveil_host_init(pcie);
+ if (ret) {
+ dev_err(dev, "Failed to initialize host\n");
+ goto error;
+ }
+
+ ret = mobiveil_pcie_interrupt_init(pcie);
+ if (ret) {
+ dev_err(dev, "Interrupt init failed\n");
+ goto error;
+ }
+
+ ret = devm_request_pci_bus_resources(dev, &pcie->resources);
+ if (ret)
+ goto error;
+
+ /* Initialize bridge */
+ list_splice_init(&pcie->resources, &bridge->windows);
+ bridge->dev.parent = dev;
+ bridge->sysdata = pcie;
+ bridge->busnr = pcie->rp.root_bus_nr;
+ bridge->ops = &mobiveil_pcie_ops;
+ bridge->map_irq = of_irq_parse_and_map_pci;
+ bridge->swizzle_irq = pci_common_swizzle;
+
+ ret = mobiveil_bringup_link(pcie);
+ if (ret) {
+ dev_info(dev, "link bring-up failed\n");
+ goto error;
+ }
+
+ /* setup the kernel resources for the newly added PCIe root bus */
+ ret = pci_scan_root_bus_bridge(bridge);
+ if (ret)
+ goto error;
+
+ bus = bridge->bus;
+
+ pci_assign_unassigned_bus_resources(bus);
+ list_for_each_entry(child, &bus->children, node)
+ pcie_bus_configure_settings(child);
+ pci_bus_add_devices(bus);
+
+ return 0;
+error:
+ pci_free_resource_list(&pcie->resources);
+ return ret;
+}
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil-plat.c
@@ -0,0 +1,59 @@
+// 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>
+ * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of_pci.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include "pcie-mobiveil.h"
+
+static int mobiveil_pcie_probe(struct platform_device *pdev)
+{
+ struct mobiveil_pcie *pcie;
+ struct pci_host_bridge *bridge;
+ struct device *dev = &pdev->dev;
+
+ bridge = devm_pci_alloc_host_bridge(dev, sizeof(*pcie));
+ if (!bridge)
+ return -ENOMEM;
+
+ pcie = pci_host_bridge_priv(bridge);
+
+ pcie->pdev = pdev;
+
+ return mobiveil_pcie_host_probe(pcie);
+}
+
+static const struct of_device_id mobiveil_pcie_of_match[] = {
+ {.compatible = "mbvl,gpex40-pcie",},
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, mobiveil_pcie_of_match);
+
+static struct platform_driver mobiveil_pcie_driver = {
+ .probe = mobiveil_pcie_probe,
+ .driver = {
+ .name = "mobiveil-pcie",
+ .of_match_table = mobiveil_pcie_of_match,
+ .suppress_bind_attrs = true,
+ },
+};
+
+builtin_platform_driver(mobiveil_pcie_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Mobiveil PCIe host controller driver");
+MODULE_AUTHOR("Subrahmanya Lingappa <l.subrahmanya@mobiveil.co.in>");
--- /dev/null
+++ b/drivers/pci/controller/mobiveil/pcie-mobiveil.c
@@ -0,0 +1,227 @@
+// 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>
+ * Refactor: Zhiqiang Hou <Zhiqiang.Hou@nxp.com>
+ */
+
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/platform_device.h>
+
+#include "pcie-mobiveil.h"
+
+/*
+ * mobiveil_pcie_sel_page - routine to access paged register
+ *
+ * Registers whose address greater than PAGED_ADDR_BNDRY (0xc00) are paged,
+ * for this scheme to work extracted higher 6 bits of the offset will be
+ * written to pg_sel field of PAB_CTRL register and rest of the lower 10
+ * bits enabled with PAGED_ADDR_BNDRY are used as offset of the register.
+ */
+static void mobiveil_pcie_sel_page(struct mobiveil_pcie *pcie, u8 pg_idx)
+{
+ u32 val;
+
+ val = readl(pcie->csr_axi_slave_base + PAB_CTRL);
+ val &= ~(PAGE_SEL_MASK << PAGE_SEL_SHIFT);
+ val |= (pg_idx & PAGE_SEL_MASK) << PAGE_SEL_SHIFT;
+
+ writel(val, pcie->csr_axi_slave_base + PAB_CTRL);
+}
+
+static void *mobiveil_pcie_comp_addr(struct mobiveil_pcie *pcie, u32 off)
+{
+ if (off < PAGED_ADDR_BNDRY) {
+ /* For directly accessed registers, clear the pg_sel field */
+ mobiveil_pcie_sel_page(pcie, 0);
+ return pcie->csr_axi_slave_base + off;
+ }
+
+ mobiveil_pcie_sel_page(pcie, OFFSET_TO_PAGE_IDX(off));
+ return pcie->csr_axi_slave_base + OFFSET_TO_PAGE_ADDR(off);
+}
+
+static int mobiveil_pcie_read(void __iomem *addr, int size, u32 *val)
+{
+ if ((uintptr_t)addr & (size - 1)) {
+ *val = 0;
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+
+ switch (size) {
+ case 4:
+ *val = readl(addr);
+ break;
+ case 2:
+ *val = readw(addr);
+ break;
+ case 1:
+ *val = readb(addr);
+ break;
+ default:
+ *val = 0;
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int mobiveil_pcie_write(void __iomem *addr, int size, u32 val)
+{
+ if ((uintptr_t)addr & (size - 1))
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+
+ switch (size) {
+ case 4:
+ writel(val, addr);
+ break;
+ case 2:
+ writew(val, addr);
+ break;
+ case 1:
+ writeb(val, addr);
+ break;
+ default:
+ return PCIBIOS_BAD_REGISTER_NUMBER;
+ }
+
+ return PCIBIOS_SUCCESSFUL;
+}
+
+u32 csr_read(struct mobiveil_pcie *pcie, u32 off, size_t size)
+{
+ void *addr;
+ u32 val;
+ int ret;
+
+ addr = mobiveil_pcie_comp_addr(pcie, off);
+
+ ret = mobiveil_pcie_read(addr, size, &val);
+ if (ret)
+ dev_err(&pcie->pdev->dev, "read CSR address failed\n");
+
+ return val;
+}
+
+void csr_write(struct mobiveil_pcie *pcie, u32 val, u32 off, size_t size)
+{
+ void *addr;
+ int ret;
+
+ addr = mobiveil_pcie_comp_addr(pcie, off);
+
+ ret = mobiveil_pcie_write(addr, size, val);
+ if (ret)
+ dev_err(&pcie->pdev->dev, "write CSR address failed\n");
+}
+
+bool mobiveil_pcie_link_up(struct mobiveil_pcie *pcie)
+{
+ if (pcie->ops->link_up)
+ return pcie->ops->link_up(pcie);
+
+ return (csr_readl(pcie, LTSSM_STATUS) &
+ LTSSM_STATUS_L0_MASK) == LTSSM_STATUS_L0;
+}
+
+void program_ib_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
+ u64 pci_addr, u32 type, u64 size)
+{
+ u32 value;
+ u64 size64 = ~(size - 1);
+
+ if (win_num >= pcie->ppio_wins) {
+ dev_err(&pcie->pdev->dev,
+ "ERROR: max inbound windows reached !\n");
+ return;
+ }
+
+ value = csr_readl(pcie, PAB_PEX_AMAP_CTRL(win_num));
+ value &= ~(AMAP_CTRL_TYPE_MASK << AMAP_CTRL_TYPE_SHIFT | WIN_SIZE_MASK);
+ value |= type << AMAP_CTRL_TYPE_SHIFT | 1 << AMAP_CTRL_EN_SHIFT |
+ (lower_32_bits(size64) & WIN_SIZE_MASK);
+ csr_writel(pcie, value, PAB_PEX_AMAP_CTRL(win_num));
+
+ csr_writel(pcie, upper_32_bits(size64),
+ PAB_EXT_PEX_AMAP_SIZEN(win_num));
+
+ csr_writel(pcie, lower_32_bits(cpu_addr),
+ PAB_PEX_AMAP_AXI_WIN(win_num));
+ csr_writel(pcie, upper_32_bits(cpu_addr),
+ PAB_EXT_PEX_AMAP_AXI_WIN(win_num));
+
+ csr_writel(pcie, lower_32_bits(pci_addr),
+ PAB_PEX_AMAP_PEX_WIN_L(win_num));
+ csr_writel(pcie, upper_32_bits(pci_addr),
+ PAB_PEX_AMAP_PEX_WIN_H(win_num));
+
+ pcie->ib_wins_configured++;
+}
+
+/*
+ * routine to program the outbound windows
+ */
+void program_ob_windows(struct mobiveil_pcie *pcie, int win_num, u64 cpu_addr,
+ u64 pci_addr, u32 type, u64 size)
+{
+ u32 value;
+ u64 size64 = ~(size - 1);
+
+ if (win_num >= pcie->apio_wins) {
+ dev_err(&pcie->pdev->dev,
+ "ERROR: max outbound windows reached !\n");
+ return;
+ }
+
+ /*
+ * program Enable Bit to 1, Type Bit to (00) base 2, AXI Window Size Bit
+ * to 4 KB in PAB_AXI_AMAP_CTRL register
+ */
+ value = csr_readl(pcie, PAB_AXI_AMAP_CTRL(win_num));
+ value &= ~(WIN_TYPE_MASK << WIN_TYPE_SHIFT | WIN_SIZE_MASK);
+ value |= 1 << WIN_ENABLE_SHIFT | type << WIN_TYPE_SHIFT |
+ (lower_32_bits(size64) & WIN_SIZE_MASK);
+ csr_writel(pcie, value, PAB_AXI_AMAP_CTRL(win_num));
+
+ csr_writel(pcie, upper_32_bits(size64), PAB_EXT_AXI_AMAP_SIZE(win_num));
+
+ /*
+ * program AXI window base with appropriate value in
+ * PAB_AXI_AMAP_AXI_WIN0 register
+ */
+ csr_writel(pcie, lower_32_bits(cpu_addr) & (~AXI_WINDOW_ALIGN_MASK),
+ PAB_AXI_AMAP_AXI_WIN(win_num));
+ csr_writel(pcie, upper_32_bits(cpu_addr),
+ PAB_EXT_AXI_AMAP_AXI_WIN(win_num));