1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __POWERNV_PCI_H
3 #define __POWERNV_PCI_H
5 #include <linux/iommu.h>
7 #include <asm/msi_bitmap.h>
11 /* Maximum possible number of ATSD MMIO registers per NPU */
12 #define NV_NMMU_ATSD_REGS 8
20 /* Precise PHB model for error management */
22 PNV_PHB_MODEL_UNKNOWN,
29 #define PNV_PCI_DIAG_BUF_SIZE 8192
30 #define PNV_IODA_PE_DEV (1 << 0) /* PE has single PCI device */
31 #define PNV_IODA_PE_BUS (1 << 1) /* PE has primary PCI bus */
32 #define PNV_IODA_PE_BUS_ALL (1 << 2) /* PE has subordinate buses */
33 #define PNV_IODA_PE_MASTER (1 << 3) /* Master PE in compound case */
34 #define PNV_IODA_PE_SLAVE (1 << 4) /* Slave PE in compound case */
35 #define PNV_IODA_PE_VF (1 << 5) /* PE for one VF */
37 /* Indicates operations are frozen for a PE: MMIO in PESTA & DMA in PESTB. */
38 #define PNV_IODA_STOPPED_STATE 0x8000000000000000
40 /* Data associated with a PE, including IOMMU tracking etc.. */
47 /* A PE can be associated with a single device or an
48 * entire bus (& children). In the former case, pdev
49 * is populated, in the later case, pbus is.
52 struct pci_dev *parent_dev;
57 /* Effective RID (device RID for a device PE and base bus
58 * RID with devfn 0 for a bus PE)
63 unsigned int pe_number;
65 /* "Base" iommu table, ie, 4K TCEs, 32-bit DMA */
66 struct iommu_table_group table_group;
68 /* 64-bit TCE bypass region */
69 bool tce_bypass_enabled;
70 uint64_t tce_bypass_base;
72 /* MSIs. MVE index is identical for for 32 and 64 bit MSI
73 * and -1 if not supported. (It's actually identical to the
78 /* PEs in compound case */
79 struct pnv_ioda_pe *master;
80 struct list_head slaves;
83 int p2p_initiator_count;
85 /* Link in list of PE#s */
86 struct list_head list;
89 #define PNV_PHB_FLAG_EEH (1 << 0)
90 #define PNV_PHB_FLAG_CXL (1 << 1) /* Real PHB supporting the cxl kernel API */
93 struct pci_controller *hose;
94 enum pnv_phb_type type;
95 enum pnv_phb_model model;
104 #ifdef CONFIG_DEBUG_FS
106 struct dentry *dbgfs;
109 #ifdef CONFIG_PCI_MSI
110 unsigned int msi_base;
111 unsigned int msi32_support;
112 struct msi_bitmap msi_bmp;
114 int (*msi_setup)(struct pnv_phb *phb, struct pci_dev *dev,
115 unsigned int hwirq, unsigned int virq,
116 unsigned int is_64, struct msi_msg *msg);
117 void (*dma_dev_setup)(struct pnv_phb *phb, struct pci_dev *pdev);
118 void (*fixup_phb)(struct pci_controller *hose);
119 int (*init_m64)(struct pnv_phb *phb);
120 void (*reserve_m64_pe)(struct pci_bus *bus,
121 unsigned long *pe_bitmap, bool all);
122 struct pnv_ioda_pe *(*pick_m64_pe)(struct pci_bus *bus, bool all);
123 int (*get_pe_state)(struct pnv_phb *phb, int pe_no);
124 void (*freeze_pe)(struct pnv_phb *phb, int pe_no);
125 int (*unfreeze_pe)(struct pnv_phb *phb, int pe_no, int opt);
128 /* Global bridge info */
129 unsigned int total_pe_num;
130 unsigned int reserved_pe_idx;
131 unsigned int root_pe_idx;
132 bool root_pe_populated;
134 /* 32-bit MMIO window */
135 unsigned int m32_size;
136 unsigned int m32_segsize;
137 unsigned int m32_pci_base;
139 /* 64-bit MMIO window */
140 unsigned int m64_bar_idx;
141 unsigned long m64_size;
142 unsigned long m64_segsize;
143 unsigned long m64_base;
144 unsigned long m64_bar_alloc;
147 unsigned int io_size;
148 unsigned int io_segsize;
149 unsigned int io_pci_base;
152 struct mutex pe_alloc_mutex;
153 unsigned long *pe_alloc;
154 struct pnv_ioda_pe *pe_array;
156 /* M32 & IO segment maps */
157 unsigned int *m64_segmap;
158 unsigned int *m32_segmap;
159 unsigned int *io_segmap;
161 /* DMA32 segment maps - IODA1 only */
162 unsigned int dma32_count;
163 unsigned int *dma32_segmap;
167 struct irq_chip irq_chip;
169 /* Sorted list of used PE's based
170 * on the sequence of creation
172 struct list_head pe_list;
173 struct mutex pe_list_mutex;
175 /* Reverse map of PEs, indexed by {bus, devfn} */
176 unsigned int pe_rmap[0x10000];
179 /* PHB and hub diagnostics */
180 unsigned int diag_data_size;
186 __be64 *mmio_atsd_regs[NV_NMMU_ATSD_REGS];
187 unsigned int mmio_atsd_count;
189 /* Bitmask for MMIO register usage */
190 unsigned long mmio_atsd_usage;
193 #ifdef CONFIG_CXL_BASE
194 struct cxl_afu *cxl_afu;
196 int p2p_target_count;
199 extern struct pci_ops pnv_pci_ops;
200 extern int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
201 unsigned long uaddr, enum dma_data_direction direction,
202 unsigned long attrs);
203 extern void pnv_tce_free(struct iommu_table *tbl, long index, long npages);
204 extern int pnv_tce_xchg(struct iommu_table *tbl, long index,
205 unsigned long *hpa, enum dma_data_direction *direction);
206 extern unsigned long pnv_tce_get(struct iommu_table *tbl, long index);
208 void pnv_pci_dump_phb_diag_data(struct pci_controller *hose,
209 unsigned char *log_buff);
210 int pnv_pci_cfg_read(struct pci_dn *pdn,
211 int where, int size, u32 *val);
212 int pnv_pci_cfg_write(struct pci_dn *pdn,
213 int where, int size, u32 val);
214 extern struct iommu_table *pnv_pci_table_alloc(int nid);
216 extern long pnv_pci_link_table_and_group(int node, int num,
217 struct iommu_table *tbl,
218 struct iommu_table_group *table_group);
219 extern void pnv_pci_unlink_table_and_group(struct iommu_table *tbl,
220 struct iommu_table_group *table_group);
221 extern void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
222 void *tce_mem, u64 tce_size,
223 u64 dma_offset, unsigned page_shift);
224 extern void pnv_pci_init_ioda_hub(struct device_node *np);
225 extern void pnv_pci_init_ioda2_phb(struct device_node *np);
226 extern void pnv_pci_init_npu_phb(struct device_node *np);
227 extern void pnv_pci_reset_secondary_bus(struct pci_dev *dev);
228 extern int pnv_eeh_phb_reset(struct pci_controller *hose, int option);
230 extern void pnv_pci_dma_dev_setup(struct pci_dev *pdev);
231 extern void pnv_pci_dma_bus_setup(struct pci_bus *bus);
232 extern int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);
233 extern void pnv_teardown_msi_irqs(struct pci_dev *pdev);
234 extern struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev);
235 extern void pnv_set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq);
236 extern bool pnv_pci_enable_device_hook(struct pci_dev *dev);
237 extern void pnv_pci_ioda2_set_bypass(struct pnv_ioda_pe *pe, bool enable);
239 extern void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level,
240 const char *fmt, ...);
241 #define pe_err(pe, fmt, ...) \
242 pe_level_printk(pe, KERN_ERR, fmt, ##__VA_ARGS__)
243 #define pe_warn(pe, fmt, ...) \
244 pe_level_printk(pe, KERN_WARNING, fmt, ##__VA_ARGS__)
245 #define pe_info(pe, fmt, ...) \
246 pe_level_printk(pe, KERN_INFO, fmt, ##__VA_ARGS__)
248 /* Nvlink functions */
249 extern void pnv_npu_try_dma_set_bypass(struct pci_dev *gpdev, bool bypass);
250 extern void pnv_pci_ioda2_tce_invalidate_entire(struct pnv_phb *phb, bool rm);
251 extern struct pnv_ioda_pe *pnv_pci_npu_setup_iommu(struct pnv_ioda_pe *npe);
252 extern long pnv_npu_set_window(struct pnv_ioda_pe *npe, int num,
253 struct iommu_table *tbl);
254 extern long pnv_npu_unset_window(struct pnv_ioda_pe *npe, int num);
255 extern void pnv_npu_take_ownership(struct pnv_ioda_pe *npe);
256 extern void pnv_npu_release_ownership(struct pnv_ioda_pe *npe);
257 extern int pnv_npu2_init(struct pnv_phb *phb);
260 extern bool pnv_cxl_enable_device_hook(struct pci_dev *dev);
261 extern void pnv_cxl_disable_device(struct pci_dev *dev);
262 extern int pnv_cxl_cx4_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type);
263 extern void pnv_cxl_cx4_teardown_msi_irqs(struct pci_dev *pdev);
266 /* phb ops (cxl switches these when enabling the kernel api on the phb) */
267 extern const struct pci_controller_ops pnv_cxl_cx4_ioda_controller_ops;
269 #endif /* __POWERNV_PCI_H */