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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_S390_PCI_H
3#define __ASM_S390_PCI_H
4
5#include <linux/pci.h>
6#include <linux/mutex.h>
7#include <linux/iommu.h>
8#include <linux/pci_hotplug.h>
9#include <asm/pci_clp.h>
10#include <asm/pci_debug.h>
11#include <asm/pci_insn.h>
12#include <asm/sclp.h>
13
14#define PCIBIOS_MIN_IO 0x1000
15#define PCIBIOS_MIN_MEM 0x10000000
16
17#define pcibios_assign_all_busses() (0)
18
19void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
20void pci_iounmap(struct pci_dev *, void __iomem *);
21int pci_domain_nr(struct pci_bus *);
22int pci_proc_domain(struct pci_bus *);
23
24#define ZPCI_BUS_NR 0 /* default bus number */
25
26#define ZPCI_NR_DMA_SPACES 1
27#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
28#define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16)
29
30#ifdef PCI
31#if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
32# error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
33#endif
34#endif /* PCI */
35
36/* PCI Function Controls */
37#define ZPCI_FC_FN_ENABLED 0x80
38#define ZPCI_FC_ERROR 0x40
39#define ZPCI_FC_BLOCKED 0x20
40#define ZPCI_FC_DMA_ENABLED 0x10
41
42#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
43
44struct zpci_fmb_fmt0 {
45 u64 dma_rbytes;
46 u64 dma_wbytes;
47};
48
49struct zpci_fmb_fmt1 {
50 u64 rx_bytes;
51 u64 rx_packets;
52 u64 tx_bytes;
53 u64 tx_packets;
54};
55
56struct zpci_fmb_fmt2 {
57 u64 consumed_work_units;
58 u64 max_work_units;
59};
60
61struct zpci_fmb_fmt3 {
62 u64 tx_bytes;
63};
64
65struct zpci_fmb {
66 u32 format : 8;
67 u32 fmt_ind : 24;
68 u32 samples;
69 u64 last_update;
70 /* common counters */
71 u64 ld_ops;
72 u64 st_ops;
73 u64 stb_ops;
74 u64 rpcit_ops;
75 /* format specific counters */
76 union {
77 struct zpci_fmb_fmt0 fmt0;
78 struct zpci_fmb_fmt1 fmt1;
79 struct zpci_fmb_fmt2 fmt2;
80 struct zpci_fmb_fmt3 fmt3;
81 };
82} __packed __aligned(128);
83
84enum zpci_state {
85 ZPCI_FN_STATE_STANDBY = 0,
86 ZPCI_FN_STATE_CONFIGURED = 1,
87 ZPCI_FN_STATE_RESERVED = 2,
88};
89
90struct zpci_bar_struct {
91 struct resource *res; /* bus resource */
92 void __iomem *mio_wb;
93 void __iomem *mio_wt;
94 u32 val; /* bar start & 3 flag bits */
95 u16 map_idx; /* index into bar mapping array */
96 u8 size; /* order 2 exponent */
97};
98
99struct s390_domain;
100struct kvm_zdev;
101
102#define ZPCI_FUNCTIONS_PER_BUS 256
103struct zpci_bus {
104 struct kref kref;
105 struct pci_bus *bus;
106 struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS];
107 struct list_head resources;
108 struct list_head bus_next;
109 struct resource bus_resource;
110 int pchid;
111 int domain_nr;
112 bool multifunction;
113 enum pci_bus_speed max_bus_speed;
114};
115
116/* Private data per function */
117struct zpci_dev {
118 struct zpci_bus *zbus;
119 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
120 struct list_head iommu_list;
121 struct kref kref;
122 struct rcu_head rcu;
123 struct hotplug_slot hotplug_slot;
124
125 enum zpci_state state;
126 u32 fid; /* function ID, used by sclp */
127 u32 fh; /* function handle, used by insn's */
128 u32 gisa; /* GISA designation for passthrough */
129 u16 vfn; /* virtual function number */
130 u16 pchid; /* physical channel ID */
131 u16 maxstbl; /* Maximum store block size */
132 u8 pfgid; /* function group ID */
133 u8 pft; /* pci function type */
134 u8 port;
135 u8 dtsm; /* Supported DT mask */
136 u8 rid_available : 1;
137 u8 has_hp_slot : 1;
138 u8 has_resources : 1;
139 u8 is_physfn : 1;
140 u8 util_str_avail : 1;
141 u8 irqs_registered : 1;
142 u8 reserved : 2;
143 unsigned int devfn; /* DEVFN part of the RID*/
144
145 struct mutex lock;
146 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
147 u32 uid; /* user defined id */
148 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
149
150 /* IRQ stuff */
151 u64 msi_addr; /* MSI address */
152 unsigned int max_msi; /* maximum number of MSI's */
153 unsigned int msi_first_bit;
154 unsigned int msi_nr_irqs;
155 struct airq_iv *aibv; /* adapter interrupt bit vector */
156 unsigned long aisb; /* number of the summary bit */
157
158 /* DMA stuff */
159 unsigned long *dma_table;
160 int tlb_refresh;
161
162 spinlock_t iommu_bitmap_lock;
163 unsigned long *iommu_bitmap;
164 unsigned long *lazy_bitmap;
165 unsigned long iommu_size;
166 unsigned long iommu_pages;
167 unsigned int next_bit;
168
169 struct iommu_device iommu_dev; /* IOMMU core handle */
170
171 char res_name[16];
172 bool mio_capable;
173 struct zpci_bar_struct bars[PCI_STD_NUM_BARS];
174
175 u64 start_dma; /* Start of available DMA addresses */
176 u64 end_dma; /* End of available DMA addresses */
177 u64 dma_mask; /* DMA address space mask */
178
179 /* Function measurement block */
180 struct zpci_fmb *fmb;
181 u16 fmb_update; /* update interval */
182 u16 fmb_length;
183 /* software counters */
184 atomic64_t allocated_pages;
185 atomic64_t mapped_pages;
186 atomic64_t unmapped_pages;
187
188 u8 version;
189 enum pci_bus_speed max_bus_speed;
190
191 struct dentry *debugfs_dev;
192
193 /* IOMMU and passthrough */
194 struct s390_domain *s390_domain; /* s390 IOMMU domain data */
195 struct kvm_zdev *kzdev;
196 struct mutex kzdev_lock;
197};
198
199static inline bool zdev_enabled(struct zpci_dev *zdev)
200{
201 return (zdev->fh & (1UL << 31)) ? true : false;
202}
203
204extern const struct attribute_group *zpci_attr_groups[];
205extern unsigned int s390_pci_force_floating __initdata;
206extern unsigned int s390_pci_no_rid;
207
208extern union zpci_sic_iib *zpci_aipb;
209extern struct airq_iv *zpci_aif_sbv;
210
211/* -----------------------------------------------------------------------------
212 Prototypes
213----------------------------------------------------------------------------- */
214/* Base stuff */
215struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
216int zpci_enable_device(struct zpci_dev *);
217int zpci_disable_device(struct zpci_dev *);
218int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
219int zpci_deconfigure_device(struct zpci_dev *zdev);
220void zpci_device_reserved(struct zpci_dev *zdev);
221bool zpci_is_device_configured(struct zpci_dev *zdev);
222
223int zpci_hot_reset_device(struct zpci_dev *zdev);
224int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64, u8 *);
225int zpci_unregister_ioat(struct zpci_dev *, u8);
226void zpci_remove_reserved_devices(void);
227void zpci_update_fh(struct zpci_dev *zdev, u32 fh);
228
229/* CLP */
230int clp_setup_writeback_mio(void);
231int clp_scan_pci_devices(void);
232int clp_query_pci_fn(struct zpci_dev *zdev);
233int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as);
234int clp_disable_fh(struct zpci_dev *zdev, u32 *fh);
235int clp_get_state(u32 fid, enum zpci_state *state);
236int clp_refresh_fh(u32 fid, u32 *fh);
237
238/* UID */
239void update_uid_checking(bool new);
240
241/* IOMMU Interface */
242int zpci_init_iommu(struct zpci_dev *zdev);
243void zpci_destroy_iommu(struct zpci_dev *zdev);
244
245#ifdef CONFIG_PCI
246static inline bool zpci_use_mio(struct zpci_dev *zdev)
247{
248 return static_branch_likely(&have_mio) && zdev->mio_capable;
249}
250
251/* Error handling and recovery */
252void zpci_event_error(void *);
253void zpci_event_availability(void *);
254bool zpci_is_enabled(void);
255#else /* CONFIG_PCI */
256static inline void zpci_event_error(void *e) {}
257static inline void zpci_event_availability(void *e) {}
258#endif /* CONFIG_PCI */
259
260#ifdef CONFIG_HOTPLUG_PCI_S390
261int zpci_init_slot(struct zpci_dev *);
262void zpci_exit_slot(struct zpci_dev *);
263#else /* CONFIG_HOTPLUG_PCI_S390 */
264static inline int zpci_init_slot(struct zpci_dev *zdev)
265{
266 return 0;
267}
268static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
269#endif /* CONFIG_HOTPLUG_PCI_S390 */
270
271/* Helpers */
272static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
273{
274 struct zpci_bus *zbus = pdev->sysdata;
275
276 return zbus->function[pdev->devfn];
277}
278
279static inline struct zpci_dev *to_zpci_dev(struct device *dev)
280{
281 return to_zpci(to_pci_dev(dev));
282}
283
284struct zpci_dev *get_zdev_by_fid(u32);
285
286/* DMA */
287int zpci_dma_init(void);
288void zpci_dma_exit(void);
289int zpci_dma_init_device(struct zpci_dev *zdev);
290int zpci_dma_exit_device(struct zpci_dev *zdev);
291
292/* IRQ */
293int __init zpci_irq_init(void);
294void __init zpci_irq_exit(void);
295
296/* FMB */
297int zpci_fmb_enable_device(struct zpci_dev *);
298int zpci_fmb_disable_device(struct zpci_dev *);
299
300/* Debug */
301int zpci_debug_init(void);
302void zpci_debug_exit(void);
303void zpci_debug_init_device(struct zpci_dev *, const char *);
304void zpci_debug_exit_device(struct zpci_dev *);
305
306/* Error handling */
307int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
308int zpci_clear_error_state(struct zpci_dev *zdev);
309int zpci_reset_load_store_blocked(struct zpci_dev *zdev);
310
311#ifdef CONFIG_NUMA
312
313/* Returns the node based on PCI bus */
314static inline int __pcibus_to_node(const struct pci_bus *bus)
315{
316 return NUMA_NO_NODE;
317}
318
319static inline const struct cpumask *
320cpumask_of_pcibus(const struct pci_bus *bus)
321{
322 return cpu_online_mask;
323}
324
325#endif /* CONFIG_NUMA */
326
327#endif
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_S390_PCI_H
3#define __ASM_S390_PCI_H
4
5#include <linux/pci.h>
6#include <linux/mutex.h>
7#include <linux/iommu.h>
8#include <linux/pci_hotplug.h>
9#include <asm/pci_clp.h>
10#include <asm/pci_debug.h>
11#include <asm/pci_insn.h>
12#include <asm/sclp.h>
13
14#define PCIBIOS_MIN_IO 0x1000
15#define PCIBIOS_MIN_MEM 0x10000000
16
17#define pcibios_assign_all_busses() (0)
18
19void __iomem *pci_iomap(struct pci_dev *, int, unsigned long);
20void pci_iounmap(struct pci_dev *, void __iomem *);
21int pci_domain_nr(struct pci_bus *);
22int pci_proc_domain(struct pci_bus *);
23
24#define ZPCI_BUS_NR 0 /* default bus number */
25
26#define ZPCI_NR_DMA_SPACES 1
27#define ZPCI_NR_DEVICES CONFIG_PCI_NR_FUNCTIONS
28#define ZPCI_DOMAIN_BITMAP_SIZE (1 << 16)
29
30#ifdef PCI
31#if (ZPCI_NR_DEVICES > ZPCI_DOMAIN_BITMAP_SIZE)
32# error ZPCI_NR_DEVICES can not be bigger than ZPCI_DOMAIN_BITMAP_SIZE
33#endif
34#endif /* PCI */
35
36/* PCI Function Controls */
37#define ZPCI_FC_FN_ENABLED 0x80
38#define ZPCI_FC_ERROR 0x40
39#define ZPCI_FC_BLOCKED 0x20
40#define ZPCI_FC_DMA_ENABLED 0x10
41
42#define ZPCI_FMB_DMA_COUNTER_VALID (1 << 23)
43
44struct zpci_fmb_fmt0 {
45 u64 dma_rbytes;
46 u64 dma_wbytes;
47};
48
49struct zpci_fmb_fmt1 {
50 u64 rx_bytes;
51 u64 rx_packets;
52 u64 tx_bytes;
53 u64 tx_packets;
54};
55
56struct zpci_fmb_fmt2 {
57 u64 consumed_work_units;
58 u64 max_work_units;
59};
60
61struct zpci_fmb_fmt3 {
62 u64 tx_bytes;
63};
64
65struct zpci_fmb {
66 u32 format : 8;
67 u32 fmt_ind : 24;
68 u32 samples;
69 u64 last_update;
70 /* common counters */
71 u64 ld_ops;
72 u64 st_ops;
73 u64 stb_ops;
74 u64 rpcit_ops;
75 /* format specific counters */
76 union {
77 struct zpci_fmb_fmt0 fmt0;
78 struct zpci_fmb_fmt1 fmt1;
79 struct zpci_fmb_fmt2 fmt2;
80 struct zpci_fmb_fmt3 fmt3;
81 };
82} __packed __aligned(128);
83
84enum zpci_state {
85 ZPCI_FN_STATE_STANDBY = 0,
86 ZPCI_FN_STATE_CONFIGURED = 1,
87 ZPCI_FN_STATE_RESERVED = 2,
88};
89
90struct zpci_bar_struct {
91 struct resource *res; /* bus resource */
92 void __iomem *mio_wb;
93 void __iomem *mio_wt;
94 u32 val; /* bar start & 3 flag bits */
95 u16 map_idx; /* index into bar mapping array */
96 u8 size; /* order 2 exponent */
97};
98
99struct kvm_zdev;
100
101#define ZPCI_FUNCTIONS_PER_BUS 256
102struct zpci_bus {
103 struct kref kref;
104 struct pci_bus *bus;
105 struct zpci_dev *function[ZPCI_FUNCTIONS_PER_BUS];
106 struct list_head resources;
107 struct list_head bus_next;
108 struct resource bus_resource;
109 int topo; /* TID if topo_is_tid, PCHID otherwise */
110 int domain_nr;
111 u8 multifunction : 1;
112 u8 topo_is_tid : 1;
113 enum pci_bus_speed max_bus_speed;
114};
115
116/* Private data per function */
117struct zpci_dev {
118 struct zpci_bus *zbus;
119 struct list_head entry; /* list of all zpci_devices, needed for hotplug, etc. */
120 struct list_head iommu_list;
121 struct kref kref;
122 struct rcu_head rcu;
123 struct hotplug_slot hotplug_slot;
124
125 struct mutex state_lock; /* protect state changes */
126 enum zpci_state state;
127 u32 fid; /* function ID, used by sclp */
128 u32 fh; /* function handle, used by insn's */
129 u32 gisa; /* GISA designation for passthrough */
130 u16 vfn; /* virtual function number */
131 u16 pchid; /* physical channel ID */
132 u16 maxstbl; /* Maximum store block size */
133 u16 rid; /* RID as supplied by firmware */
134 u16 tid; /* Topology for which RID is valid */
135 u8 pfgid; /* function group ID */
136 u8 pft; /* pci function type */
137 u8 port;
138 u8 fidparm;
139 u8 dtsm; /* Supported DT mask */
140 u8 rid_available : 1;
141 u8 has_hp_slot : 1;
142 u8 has_resources : 1;
143 u8 is_physfn : 1;
144 u8 util_str_avail : 1;
145 u8 irqs_registered : 1;
146 u8 tid_avail : 1;
147 u8 reserved : 1;
148 unsigned int devfn; /* DEVFN part of the RID*/
149
150 u8 pfip[CLP_PFIP_NR_SEGMENTS]; /* pci function internal path */
151 u32 uid; /* user defined id */
152 u8 util_str[CLP_UTIL_STR_LEN]; /* utility string */
153
154 /* IRQ stuff */
155 u64 msi_addr; /* MSI address */
156 unsigned int max_msi; /* maximum number of MSI's */
157 unsigned int msi_first_bit;
158 unsigned int msi_nr_irqs;
159 struct airq_iv *aibv; /* adapter interrupt bit vector */
160 unsigned long aisb; /* number of the summary bit */
161
162 /* DMA stuff */
163 unsigned long *dma_table;
164 int tlb_refresh;
165
166 struct iommu_device iommu_dev; /* IOMMU core handle */
167
168 char res_name[16];
169 bool mio_capable;
170 struct zpci_bar_struct bars[PCI_STD_NUM_BARS];
171
172 u64 start_dma; /* Start of available DMA addresses */
173 u64 end_dma; /* End of available DMA addresses */
174 u64 dma_mask; /* DMA address space mask */
175
176 /* Function measurement block */
177 struct mutex fmb_lock;
178 struct zpci_fmb *fmb;
179 u16 fmb_update; /* update interval */
180 u16 fmb_length;
181
182 u8 version;
183 enum pci_bus_speed max_bus_speed;
184
185 struct dentry *debugfs_dev;
186
187 /* IOMMU and passthrough */
188 struct iommu_domain *s390_domain; /* attached IOMMU domain */
189 struct kvm_zdev *kzdev;
190 struct mutex kzdev_lock;
191 spinlock_t dom_lock; /* protect s390_domain change */
192};
193
194static inline bool zdev_enabled(struct zpci_dev *zdev)
195{
196 return (zdev->fh & (1UL << 31)) ? true : false;
197}
198
199extern const struct attribute_group zpci_attr_group;
200extern const struct attribute_group pfip_attr_group;
201extern const struct attribute_group zpci_ident_attr_group;
202
203#define ARCH_PCI_DEV_GROUPS &zpci_attr_group, \
204 &pfip_attr_group, \
205 &zpci_ident_attr_group,
206
207extern unsigned int s390_pci_force_floating __initdata;
208extern unsigned int s390_pci_no_rid;
209
210extern union zpci_sic_iib *zpci_aipb;
211extern struct airq_iv *zpci_aif_sbv;
212
213/* -----------------------------------------------------------------------------
214 Prototypes
215----------------------------------------------------------------------------- */
216/* Base stuff */
217struct zpci_dev *zpci_create_device(u32 fid, u32 fh, enum zpci_state state);
218int zpci_add_device(struct zpci_dev *zdev);
219int zpci_enable_device(struct zpci_dev *);
220int zpci_disable_device(struct zpci_dev *);
221int zpci_scan_configured_device(struct zpci_dev *zdev, u32 fh);
222int zpci_deconfigure_device(struct zpci_dev *zdev);
223void zpci_device_reserved(struct zpci_dev *zdev);
224bool zpci_is_device_configured(struct zpci_dev *zdev);
225int zpci_scan_devices(void);
226
227int zpci_hot_reset_device(struct zpci_dev *zdev);
228int zpci_register_ioat(struct zpci_dev *, u8, u64, u64, u64, u8 *);
229int zpci_unregister_ioat(struct zpci_dev *, u8);
230void zpci_remove_reserved_devices(void);
231void zpci_update_fh(struct zpci_dev *zdev, u32 fh);
232
233/* CLP */
234int clp_setup_writeback_mio(void);
235int clp_scan_pci_devices(struct list_head *scan_list);
236int clp_query_pci_fn(struct zpci_dev *zdev);
237int clp_enable_fh(struct zpci_dev *zdev, u32 *fh, u8 nr_dma_as);
238int clp_disable_fh(struct zpci_dev *zdev, u32 *fh);
239int clp_get_state(u32 fid, enum zpci_state *state);
240int clp_refresh_fh(u32 fid, u32 *fh);
241
242/* UID */
243void update_uid_checking(bool new);
244
245/* IOMMU Interface */
246int zpci_init_iommu(struct zpci_dev *zdev);
247void zpci_destroy_iommu(struct zpci_dev *zdev);
248
249#ifdef CONFIG_PCI
250static inline bool zpci_use_mio(struct zpci_dev *zdev)
251{
252 return static_branch_likely(&have_mio) && zdev->mio_capable;
253}
254
255/* Error handling and recovery */
256void zpci_event_error(void *);
257void zpci_event_availability(void *);
258bool zpci_is_enabled(void);
259#else /* CONFIG_PCI */
260static inline void zpci_event_error(void *e) {}
261static inline void zpci_event_availability(void *e) {}
262#endif /* CONFIG_PCI */
263
264#ifdef CONFIG_HOTPLUG_PCI_S390
265int zpci_init_slot(struct zpci_dev *);
266void zpci_exit_slot(struct zpci_dev *);
267#else /* CONFIG_HOTPLUG_PCI_S390 */
268static inline int zpci_init_slot(struct zpci_dev *zdev)
269{
270 return 0;
271}
272static inline void zpci_exit_slot(struct zpci_dev *zdev) {}
273#endif /* CONFIG_HOTPLUG_PCI_S390 */
274
275/* Helpers */
276static inline struct zpci_dev *to_zpci(struct pci_dev *pdev)
277{
278 struct zpci_bus *zbus = pdev->sysdata;
279
280 return zbus->function[pdev->devfn];
281}
282
283static inline struct zpci_dev *to_zpci_dev(struct device *dev)
284{
285 return to_zpci(to_pci_dev(dev));
286}
287
288struct zpci_dev *get_zdev_by_fid(u32);
289
290/* DMA */
291int zpci_dma_init(void);
292void zpci_dma_exit(void);
293int zpci_dma_init_device(struct zpci_dev *zdev);
294int zpci_dma_exit_device(struct zpci_dev *zdev);
295
296/* IRQ */
297int __init zpci_irq_init(void);
298void __init zpci_irq_exit(void);
299
300/* FMB */
301int zpci_fmb_enable_device(struct zpci_dev *);
302int zpci_fmb_disable_device(struct zpci_dev *);
303
304/* Debug */
305int zpci_debug_init(void);
306void zpci_debug_exit(void);
307void zpci_debug_init_device(struct zpci_dev *, const char *);
308void zpci_debug_exit_device(struct zpci_dev *);
309
310/* Error handling */
311int zpci_report_error(struct pci_dev *, struct zpci_report_error_header *);
312int zpci_clear_error_state(struct zpci_dev *zdev);
313int zpci_reset_load_store_blocked(struct zpci_dev *zdev);
314
315#ifdef CONFIG_NUMA
316
317/* Returns the node based on PCI bus */
318static inline int __pcibus_to_node(const struct pci_bus *bus)
319{
320 return NUMA_NO_NODE;
321}
322
323static inline const struct cpumask *
324cpumask_of_pcibus(const struct pci_bus *bus)
325{
326 return cpu_online_mask;
327}
328
329#endif /* CONFIG_NUMA */
330
331#endif