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Greg Kroah-Hartmanb2441312017-11-01 15:07:57 +01001/* SPDX-License-Identifier: GPL-2.0 */
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +00002#ifndef __POWERNV_PCI_H
3#define __POWERNV_PCI_H
4
Ian Munsief4568342016-07-14 07:17:00 +10005#include <linux/iommu.h>
6#include <asm/iommu.h>
7#include <asm/msi_bitmap.h>
8
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +00009struct pci_dn;
10
Alistair Popple1ab66d12017-04-03 19:51:44 +100011/* Maximum possible number of ATSD MMIO registers per NPU */
12#define NV_NMMU_ATSD_REGS 8
13
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +000014enum pnv_phb_type {
Frederic Barrat7f2c39e2018-01-23 12:31:36 +010015 PNV_PHB_IODA1 = 0,
16 PNV_PHB_IODA2 = 1,
17 PNV_PHB_NPU_NVLINK = 2,
18 PNV_PHB_NPU_OCAPI = 3,
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +000019};
20
Benjamin Herrenschmidtcee72d52011-11-29 18:22:53 +000021/* Precise PHB model for error management */
22enum pnv_phb_model {
23 PNV_PHB_MODEL_UNKNOWN,
Benjamin Herrenschmidtcee72d52011-11-29 18:22:53 +000024 PNV_PHB_MODEL_P7IOC,
Gavin Shanaa0c0332013-04-25 19:20:57 +000025 PNV_PHB_MODEL_PHB3,
Alistair Popple5d2aa712015-12-17 13:43:13 +110026 PNV_PHB_MODEL_NPU,
Alistair Popple616badd2017-01-10 15:41:44 +110027 PNV_PHB_MODEL_NPU2,
Benjamin Herrenschmidtcee72d52011-11-29 18:22:53 +000028};
29
Gavin Shan5c9d6d72013-09-06 09:00:03 +080030#define PNV_PCI_DIAG_BUF_SIZE 8192
Gavin Shan7ebdf952012-08-20 03:49:15 +000031#define PNV_IODA_PE_DEV (1 << 0) /* PE has single PCI device */
32#define PNV_IODA_PE_BUS (1 << 1) /* PE has primary PCI bus */
33#define PNV_IODA_PE_BUS_ALL (1 << 2) /* PE has subordinate buses */
Guo Chao262af552014-07-21 14:42:30 +100034#define PNV_IODA_PE_MASTER (1 << 3) /* Master PE in compound case */
35#define PNV_IODA_PE_SLAVE (1 << 4) /* Slave PE in compound case */
Wei Yang781a8682015-03-25 16:23:57 +080036#define PNV_IODA_PE_VF (1 << 5) /* PE for one VF */
Benjamin Herrenschmidtcee72d52011-11-29 18:22:53 +000037
Russell Currey31bbd452017-06-14 14:19:58 +100038/* Indicates operations are frozen for a PE: MMIO in PESTA & DMA in PESTB. */
39#define PNV_IODA_STOPPED_STATE 0x8000000000000000
40
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000041/* Data associated with a PE, including IOMMU tracking etc.. */
Gavin Shan4cce9552013-04-25 19:21:00 +000042struct pnv_phb;
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000043struct pnv_ioda_pe {
Gavin Shan7ebdf952012-08-20 03:49:15 +000044 unsigned long flags;
Gavin Shan4cce9552013-04-25 19:21:00 +000045 struct pnv_phb *phb;
Gavin Shanc5f77002016-05-20 16:41:35 +100046 int device_count;
Gavin Shan7ebdf952012-08-20 03:49:15 +000047
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000048 /* A PE can be associated with a single device or an
49 * entire bus (& children). In the former case, pdev
50 * is populated, in the later case, pbus is.
51 */
Wei Yang781a8682015-03-25 16:23:57 +080052#ifdef CONFIG_PCI_IOV
53 struct pci_dev *parent_dev;
54#endif
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000055 struct pci_dev *pdev;
56 struct pci_bus *pbus;
57
58 /* Effective RID (device RID for a device PE and base bus
59 * RID with devfn 0 for a bus PE)
60 */
61 unsigned int rid;
62
63 /* PE number */
64 unsigned int pe_number;
65
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000066 /* "Base" iommu table, ie, 4K TCEs, 32-bit DMA */
Alexey Kardashevskiyb348aa62015-06-05 16:35:08 +100067 struct iommu_table_group table_group;
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000068
Benjamin Herrenschmidtcd15b042014-02-11 11:32:38 +110069 /* 64-bit TCE bypass region */
70 bool tce_bypass_enabled;
71 uint64_t tce_bypass_base;
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000072
73 /* MSIs. MVE index is identical for for 32 and 64 bit MSI
74 * and -1 if not supported. (It's actually identical to the
75 * PE number)
76 */
77 int mve_number;
78
Guo Chao262af552014-07-21 14:42:30 +100079 /* PEs in compound case */
80 struct pnv_ioda_pe *master;
81 struct list_head slaves;
82
Frederic Barrat25529102017-08-04 11:55:14 +020083 /* PCI peer-to-peer*/
84 int p2p_initiator_count;
85
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000086 /* Link in list of PE#s */
Gavin Shan7ebdf952012-08-20 03:49:15 +000087 struct list_head list;
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +000088};
89
Gavin Shanf5bc6b72014-04-24 18:00:09 +100090#define PNV_PHB_FLAG_EEH (1 << 0)
Ian Munsie4361b032016-07-14 07:17:06 +100091#define PNV_PHB_FLAG_CXL (1 << 1) /* Real PHB supporting the cxl kernel API */
Gavin Shanf5bc6b72014-04-24 18:00:09 +100092
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +000093struct pnv_phb {
94 struct pci_controller *hose;
95 enum pnv_phb_type type;
Benjamin Herrenschmidtcee72d52011-11-29 18:22:53 +000096 enum pnv_phb_model model;
Gavin Shan8747f362013-06-20 13:21:06 +080097 u64 hub_id;
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +000098 u64 opal_id;
Gavin Shanf5bc6b72014-04-24 18:00:09 +100099 int flags;
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +0000100 void __iomem *regs;
Benjamin Herrenschmidtfd141d1a2016-07-08 16:37:14 +1000101 u64 regs_phys;
Gavin Shandb1266c2012-08-20 03:49:18 +0000102 int initialized;
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +0000103 spinlock_t lock;
104
Gavin Shan37c367f2013-06-20 18:13:25 +0800105#ifdef CONFIG_DEBUG_FS
Gavin Shan7f52a5262014-04-24 18:00:18 +1000106 int has_dbgfs;
Gavin Shan37c367f2013-06-20 18:13:25 +0800107 struct dentry *dbgfs;
108#endif
109
Benjamin Herrenschmidtc1a25622011-09-19 17:45:06 +0000110#ifdef CONFIG_PCI_MSI
Benjamin Herrenschmidtc1a25622011-09-19 17:45:06 +0000111 unsigned int msi_base;
Benjamin Herrenschmidtc1a25622011-09-19 17:45:06 +0000112 unsigned int msi32_support;
Gavin Shanfb1b55d2013-03-05 21:12:37 +0000113 struct msi_bitmap msi_bmp;
Benjamin Herrenschmidtc1a25622011-09-19 17:45:06 +0000114#endif
115 int (*msi_setup)(struct pnv_phb *phb, struct pci_dev *dev,
Gavin Shan137436c2013-04-25 19:20:59 +0000116 unsigned int hwirq, unsigned int virq,
117 unsigned int is_64, struct msi_msg *msg);
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +0000118 void (*dma_dev_setup)(struct pnv_phb *phb, struct pci_dev *pdev);
119 void (*fixup_phb)(struct pci_controller *hose);
Guo Chao262af552014-07-21 14:42:30 +1000120 int (*init_m64)(struct pnv_phb *phb);
Gavin Shan96a2f922015-06-19 12:26:17 +1000121 void (*reserve_m64_pe)(struct pci_bus *bus,
122 unsigned long *pe_bitmap, bool all);
Gavin Shan1e916772016-05-03 15:41:36 +1000123 struct pnv_ioda_pe *(*pick_m64_pe)(struct pci_bus *bus, bool all);
Gavin Shan49dec922014-07-21 14:42:33 +1000124 int (*get_pe_state)(struct pnv_phb *phb, int pe_no);
125 void (*freeze_pe)(struct pnv_phb *phb, int pe_no);
126 int (*unfreeze_pe)(struct pnv_phb *phb, int pe_no, int opt);
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +0000127
Russell Currey2de50e92016-02-08 15:08:20 +1100128 struct {
129 /* Global bridge info */
Gavin Shan92b8f132016-05-03 15:41:24 +1000130 unsigned int total_pe_num;
131 unsigned int reserved_pe_idx;
Gavin Shan63803c32016-05-20 16:41:32 +1000132 unsigned int root_pe_idx;
133 bool root_pe_populated;
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +0000134
Russell Currey2de50e92016-02-08 15:08:20 +1100135 /* 32-bit MMIO window */
136 unsigned int m32_size;
137 unsigned int m32_segsize;
138 unsigned int m32_pci_base;
Guo Chao262af552014-07-21 14:42:30 +1000139
Russell Currey2de50e92016-02-08 15:08:20 +1100140 /* 64-bit MMIO window */
141 unsigned int m64_bar_idx;
142 unsigned long m64_size;
143 unsigned long m64_segsize;
144 unsigned long m64_base;
145 unsigned long m64_bar_alloc;
Guo Chao262af552014-07-21 14:42:30 +1000146
Russell Currey2de50e92016-02-08 15:08:20 +1100147 /* IO ports */
148 unsigned int io_size;
149 unsigned int io_segsize;
150 unsigned int io_pci_base;
Guo Chao262af552014-07-21 14:42:30 +1000151
Gavin Shan13ce7592016-05-03 15:41:23 +1000152 /* PE allocation */
Russell Currey2de50e92016-02-08 15:08:20 +1100153 struct mutex pe_alloc_mutex;
Gavin Shan13ce7592016-05-03 15:41:23 +1000154 unsigned long *pe_alloc;
155 struct pnv_ioda_pe *pe_array;
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +0000156
Russell Currey2de50e92016-02-08 15:08:20 +1100157 /* M32 & IO segment maps */
Gavin Shan93289d82016-05-03 15:41:29 +1000158 unsigned int *m64_segmap;
Russell Currey2de50e92016-02-08 15:08:20 +1100159 unsigned int *m32_segmap;
160 unsigned int *io_segmap;
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +0000161
Gavin Shan2b923ed2016-05-05 12:04:16 +1000162 /* DMA32 segment maps - IODA1 only */
163 unsigned int dma32_count;
164 unsigned int *dma32_segmap;
165
Russell Currey2de50e92016-02-08 15:08:20 +1100166 /* IRQ chip */
167 int irq_chip_init;
168 struct irq_chip irq_chip;
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +0000169
Russell Currey2de50e92016-02-08 15:08:20 +1100170 /* Sorted list of used PE's based
171 * on the sequence of creation
172 */
173 struct list_head pe_list;
174 struct mutex pe_list_mutex;
Gavin Shan137436c2013-04-25 19:20:59 +0000175
Gavin Shanc1275622016-05-20 16:41:29 +1000176 /* Reverse map of PEs, indexed by {bus, devfn} */
177 unsigned int pe_rmap[0x10000];
Russell Currey2de50e92016-02-08 15:08:20 +1100178 } ioda;
Benjamin Herrenschmidtcee72d52011-11-29 18:22:53 +0000179
Russell Currey5cb1f8f2017-06-14 14:19:59 +1000180 /* PHB and hub diagnostics */
181 unsigned int diag_data_size;
182 u8 *diag_data;
Brian W Hartca1de5d2013-12-20 13:06:01 -0600183
Alistair Popple1ab66d12017-04-03 19:51:44 +1000184 /* Nvlink2 data */
185 struct npu {
186 int index;
187 __be64 *mmio_atsd_regs[NV_NMMU_ATSD_REGS];
188 unsigned int mmio_atsd_count;
189
190 /* Bitmask for MMIO register usage */
191 unsigned long mmio_atsd_usage;
Alistair Popple1b2c2b12017-09-06 11:49:00 +1000192
193 /* Do we need to explicitly flush the nest mmu? */
194 bool nmmu_flush;
Alistair Popple1ab66d12017-04-03 19:51:44 +1000195 } npu;
196
Ian Munsie4361b032016-07-14 07:17:06 +1000197#ifdef CONFIG_CXL_BASE
198 struct cxl_afu *cxl_afu;
199#endif
Frederic Barrat25529102017-08-04 11:55:14 +0200200 int p2p_target_count;
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +0000201};
202
203extern struct pci_ops pnv_pci_ops;
204
Gavin Shan93aef2a2013-11-22 16:28:45 +0800205void pnv_pci_dump_phb_diag_data(struct pci_controller *hose,
206 unsigned char *log_buff);
Gavin Shan3532a7412015-03-17 16:15:03 +1100207int pnv_pci_cfg_read(struct pci_dn *pdn,
Gavin Shan9bf41be2013-06-27 13:46:48 +0800208 int where, int size, u32 *val);
Gavin Shan3532a7412015-03-17 16:15:03 +1100209int pnv_pci_cfg_write(struct pci_dn *pdn,
Gavin Shan9bf41be2013-06-27 13:46:48 +0800210 int where, int size, u32 val);
Alexey Kardashevskiy0eaf4de2015-06-05 16:35:09 +1000211extern struct iommu_table *pnv_pci_table_alloc(int nid);
212
Benjamin Herrenschmidt184cd4a2011-11-15 17:29:08 +0000213extern void pnv_pci_init_ioda_hub(struct device_node *np);
Gavin Shanaa0c0332013-04-25 19:20:57 +0000214extern void pnv_pci_init_ioda2_phb(struct device_node *np);
Alistair Popple5d2aa712015-12-17 13:43:13 +1100215extern void pnv_pci_init_npu_phb(struct device_node *np);
Frederic Barrat7f2c39e2018-01-23 12:31:36 +0100216extern void pnv_pci_init_npu2_opencapi_phb(struct device_node *np);
Gavin Shand92a2082014-04-24 18:00:24 +1000217extern void pnv_pci_reset_secondary_bus(struct pci_dev *dev);
Gavin Shancadf3642015-02-16 14:45:47 +1100218extern int pnv_eeh_phb_reset(struct pci_controller *hose, int option);
Benjamin Herrenschmidt73ed1482013-05-10 16:59:18 +1000219
Daniel Axtens92ae0352015-04-28 15:12:05 +1000220extern void pnv_pci_dma_dev_setup(struct pci_dev *pdev);
Gavin Shan1bc74f12016-02-09 15:50:22 +1100221extern void pnv_pci_dma_bus_setup(struct pci_bus *bus);
Daniel Axtens92ae0352015-04-28 15:12:05 +1000222extern int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);
223extern void pnv_teardown_msi_irqs(struct pci_dev *pdev);
Ian Munsief4568342016-07-14 07:17:00 +1000224extern struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev);
225extern void pnv_set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq);
Ian Munsie4361b032016-07-14 07:17:06 +1000226extern bool pnv_pci_enable_device_hook(struct pci_dev *dev);
Frederic Barrat25529102017-08-04 11:55:14 +0200227extern void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable);
Benjamin Herrenschmidtb9fde582017-09-07 16:35:44 +1000228extern int pnv_eeh_post_init(void);
Daniel Axtens92ae0352015-04-28 15:12:05 +1000229
Alexey Kardashevskiy7d623e42016-04-29 18:55:21 +1000230extern void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
231 const char *fmt, ...);
232#define pe_err(pe, fmt, ...) \
233 pe_level_printk(pe, KERN_ERR, fmt, ##__VA_ARGS__)
234#define pe_warn(pe, fmt, ...) \
235 pe_level_printk(pe, KERN_WARNING, fmt, ##__VA_ARGS__)
236#define pe_info(pe, fmt, ...) \
237 pe_level_printk(pe, KERN_INFO, fmt, ##__VA_ARGS__)
238
Alistair Popple5d2aa712015-12-17 13:43:13 +1100239/* Nvlink functions */
Alexey Kardashevskiyf9f83452016-04-29 18:55:20 +1000240extern void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, bool bypass);
Alistair Popple6b3d12a2017-05-03 13:24:08 +1000241extern void pnv_pci_ioda2_tce_invalidate_entire(struct pnv_phb *phb, bool rm);
Alexey Kardashevskiyb5cb9ab2016-04-29 18:55:24 +1000242extern struct pnv_ioda_pe *pnv_pci_npu_setup_iommu(struct pnv_ioda_pe *npe);
243extern long pnv_npu_set_window(struct pnv_ioda_pe *npe, int num,
244 struct iommu_table *tbl);
245extern long pnv_npu_unset_window(struct pnv_ioda_pe *npe, int num);
246extern void pnv_npu_take_ownership(struct pnv_ioda_pe *npe);
247extern void pnv_npu_release_ownership(struct pnv_ioda_pe *npe);
Alistair Popple1ab66d12017-04-03 19:51:44 +1000248extern int pnv_npu2_init(struct pnv_phb *phb);
Ian Munsie4361b032016-07-14 07:17:06 +1000249
250/* cxl functions */
251extern bool pnv_cxl_enable_device_hook(struct pci_dev *dev);
252extern void pnv_cxl_disable_device(struct pci_dev *dev);
Ian Munsiea2f67d52016-07-14 07:17:10 +1000253extern int pnv_cxl_cx4_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);
254extern void pnv_cxl_cx4_teardown_msi_irqs(struct pci_dev *pdev);
Ian Munsie4361b032016-07-14 07:17:06 +1000255
256
257/* phb ops (cxl switches these when enabling the kernel api on the phb) */
258extern const struct pci_controller_ops pnv_cxl_cx4_ioda_controller_ops;
259
Alexey Kardashevskiy191c2282018-07-04 16:13:45 +1000260/* pci-ioda-tce.c */
261#define POWERNV_IOMMU_DEFAULT_LEVELS 1
262#define POWERNV_IOMMU_MAX_LEVELS 5
263
264extern int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
265 unsigned long uaddr, enum dma_data_direction direction,
266 unsigned long attrs);
267extern void pnv_tce_free(struct iommu_table *tbl, long index, long npages);
268extern int pnv_tce_xchg(struct iommu_table *tbl, long index,
Alexey Kardashevskiya68bd122018-07-04 16:13:49 +1000269 unsigned long *hpa, enum dma_data_direction *direction,
270 bool alloc);
271extern __be64 *pnv_tce_useraddrptr(struct iommu_table *tbl, long index,
272 bool alloc);
Alexey Kardashevskiy191c2282018-07-04 16:13:45 +1000273extern unsigned long pnv_tce_get(struct iommu_table *tbl, long index);
274
275extern long pnv_pci_ioda2_table_alloc_pages(int nid, __u64 bus_offset,
276 __u32 page_shift, __u64 window_size, __u32 levels,
Alexey Kardashevskiy090bad32018-07-04 16:13:47 +1000277 bool alloc_userspace_copy, struct iommu_table *tbl);
Alexey Kardashevskiy191c2282018-07-04 16:13:45 +1000278extern void pnv_pci_ioda2_table_free_pages(struct iommu_table *tbl);
279
280extern long pnv_pci_link_table_and_group(int node, int num,
281 struct iommu_table *tbl,
282 struct iommu_table_group *table_group);
283extern void pnv_pci_unlink_table_and_group(struct iommu_table *tbl,
284 struct iommu_table_group *table_group);
285extern void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
286 void *tce_mem, u64 tce_size,
287 u64 dma_offset, unsigned int page_shift);
288
Benjamin Herrenschmidt61305a92011-09-19 17:45:05 +0000289#endif /* __POWERNV_PCI_H */