Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 1 | /* |
| 2 | * PCI Backend Common Data Structures & Function Declarations |
| 3 | * |
| 4 | * Author: Ryan Wilson <hap9@epoch.ncsc.mil> |
| 5 | */ |
| 6 | #ifndef __XEN_PCIBACK_H__ |
| 7 | #define __XEN_PCIBACK_H__ |
| 8 | |
| 9 | #include <linux/pci.h> |
| 10 | #include <linux/interrupt.h> |
| 11 | #include <xen/xenbus.h> |
| 12 | #include <linux/list.h> |
| 13 | #include <linux/spinlock.h> |
| 14 | #include <linux/workqueue.h> |
Konrad Rzeszutek Wilk | 8bfd4e0 | 2011-07-19 20:09:43 -0400 | [diff] [blame] | 15 | #include <linux/atomic.h> |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 16 | #include <xen/interface/io/pciif.h> |
| 17 | |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 18 | #define DRV_NAME "xen-pciback" |
| 19 | |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 20 | struct pci_dev_entry { |
| 21 | struct list_head list; |
| 22 | struct pci_dev *dev; |
| 23 | }; |
| 24 | |
Konrad Rzeszutek Wilk | 8bfd4e0 | 2011-07-19 20:09:43 -0400 | [diff] [blame] | 25 | #define _PDEVF_op_active (0) |
| 26 | #define PDEVF_op_active (1<<(_PDEVF_op_active)) |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 27 | #define _PCIB_op_pending (1) |
| 28 | #define PCIB_op_pending (1<<(_PCIB_op_pending)) |
| 29 | |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 30 | struct xen_pcibk_device { |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 31 | void *pci_dev_data; |
Konrad Rzeszutek Wilk | b1766b6 | 2011-09-16 14:43:14 -0400 | [diff] [blame] | 32 | struct mutex dev_lock; |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 33 | struct xenbus_device *xdev; |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 34 | struct xenbus_watch be_watch; |
| 35 | u8 be_watching; |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 36 | int evtchn_irq; |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 37 | struct xen_pci_sharedinfo *sh_info; |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 38 | unsigned long flags; |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 39 | struct work_struct op_work; |
| 40 | }; |
| 41 | |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 42 | struct xen_pcibk_dev_data { |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 43 | struct list_head config_fields; |
Konrad Rzeszutek Wilk | cd9db80 | 2012-01-04 14:30:58 -0500 | [diff] [blame] | 44 | struct pci_saved_state *pci_saved_state; |
Konrad Rzeszutek Wilk | 0513fe9 | 2011-07-19 18:56:39 -0400 | [diff] [blame] | 45 | unsigned int permissive:1; |
| 46 | unsigned int warned_on_write:1; |
| 47 | unsigned int enable_intx:1; |
| 48 | unsigned int isr_on:1; /* Whether the IRQ handler is installed. */ |
| 49 | unsigned int ack_intr:1; /* .. and ACK-ing */ |
| 50 | unsigned long handled; |
| 51 | unsigned int irq; /* Saved in case device transitions to MSI/MSI-X */ |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 52 | char irq_name[0]; /* xen-pcibk[000:04:00.0] */ |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 53 | }; |
| 54 | |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 55 | /* Used by XenBus and xen_pcibk_ops.c */ |
| 56 | extern wait_queue_head_t xen_pcibk_aer_wait_queue; |
| 57 | extern struct workqueue_struct *xen_pcibk_wq; |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 58 | /* Used by pcistub.c and conf_space_quirks.c */ |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 59 | extern struct list_head xen_pcibk_quirks; |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 60 | |
| 61 | /* Get/Put PCI Devices that are hidden from the PCI Backend Domain */ |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 62 | struct pci_dev *pcistub_get_pci_dev_by_slot(struct xen_pcibk_device *pdev, |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 63 | int domain, int bus, |
| 64 | int slot, int func); |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 65 | struct pci_dev *pcistub_get_pci_dev(struct xen_pcibk_device *pdev, |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 66 | struct pci_dev *dev); |
| 67 | void pcistub_put_pci_dev(struct pci_dev *dev); |
| 68 | |
| 69 | /* Ensure a device is turned off or reset */ |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 70 | void xen_pcibk_reset_device(struct pci_dev *pdev); |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 71 | |
| 72 | /* Access a virtual configuration space for a PCI device */ |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 73 | int xen_pcibk_config_init(void); |
| 74 | int xen_pcibk_config_init_dev(struct pci_dev *dev); |
| 75 | void xen_pcibk_config_free_dyn_fields(struct pci_dev *dev); |
| 76 | void xen_pcibk_config_reset_dev(struct pci_dev *dev); |
| 77 | void xen_pcibk_config_free_dev(struct pci_dev *dev); |
| 78 | int xen_pcibk_config_read(struct pci_dev *dev, int offset, int size, |
| 79 | u32 *ret_val); |
| 80 | int xen_pcibk_config_write(struct pci_dev *dev, int offset, int size, |
| 81 | u32 value); |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 82 | |
| 83 | /* Handle requests for specific devices from the frontend */ |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 84 | typedef int (*publish_pci_dev_cb) (struct xen_pcibk_device *pdev, |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 85 | unsigned int domain, unsigned int bus, |
| 86 | unsigned int devfn, unsigned int devid); |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 87 | typedef int (*publish_pci_root_cb) (struct xen_pcibk_device *pdev, |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 88 | unsigned int domain, unsigned int bus); |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 89 | |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 90 | /* Backend registration for the two types of BDF representation: |
| 91 | * vpci - BDFs start at 00 |
| 92 | * passthrough - BDFs are exactly like in the host. |
| 93 | */ |
| 94 | struct xen_pcibk_backend { |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 95 | const char *name; |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 96 | int (*init)(struct xen_pcibk_device *pdev); |
| 97 | void (*free)(struct xen_pcibk_device *pdev); |
| 98 | int (*find)(struct pci_dev *pcidev, struct xen_pcibk_device *pdev, |
| 99 | unsigned int *domain, unsigned int *bus, |
| 100 | unsigned int *devfn); |
| 101 | int (*publish)(struct xen_pcibk_device *pdev, publish_pci_root_cb cb); |
| 102 | void (*release)(struct xen_pcibk_device *pdev, struct pci_dev *dev); |
| 103 | int (*add)(struct xen_pcibk_device *pdev, struct pci_dev *dev, |
| 104 | int devid, publish_pci_dev_cb publish_cb); |
| 105 | struct pci_dev *(*get)(struct xen_pcibk_device *pdev, |
| 106 | unsigned int domain, unsigned int bus, |
| 107 | unsigned int devfn); |
| 108 | }; |
| 109 | |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 110 | extern const struct xen_pcibk_backend xen_pcibk_vpci_backend; |
| 111 | extern const struct xen_pcibk_backend xen_pcibk_passthrough_backend; |
| 112 | extern const struct xen_pcibk_backend *xen_pcibk_backend; |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 113 | |
| 114 | static inline int xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev, |
| 115 | struct pci_dev *dev, |
| 116 | int devid, |
| 117 | publish_pci_dev_cb publish_cb) |
| 118 | { |
| 119 | if (xen_pcibk_backend && xen_pcibk_backend->add) |
| 120 | return xen_pcibk_backend->add(pdev, dev, devid, publish_cb); |
| 121 | return -1; |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 122 | } |
| 123 | |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 124 | static inline void xen_pcibk_release_pci_dev(struct xen_pcibk_device *pdev, |
| 125 | struct pci_dev *dev) |
| 126 | { |
| 127 | if (xen_pcibk_backend && xen_pcibk_backend->free) |
| 128 | return xen_pcibk_backend->release(pdev, dev); |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 129 | } |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 130 | |
| 131 | static inline struct pci_dev * |
| 132 | xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev, unsigned int domain, |
| 133 | unsigned int bus, unsigned int devfn) |
| 134 | { |
| 135 | if (xen_pcibk_backend && xen_pcibk_backend->get) |
| 136 | return xen_pcibk_backend->get(pdev, domain, bus, devfn); |
| 137 | return NULL; |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 138 | } |
| 139 | |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 140 | /** |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 141 | * Add for domain0 PCIE-AER handling. Get guest domain/bus/devfn in xen_pcibk |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 142 | * before sending aer request to pcifront, so that guest could identify |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 143 | * device, coopearte with xen_pcibk to finish aer recovery job if device driver |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 144 | * has the capability |
| 145 | */ |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 146 | static inline int xen_pcibk_get_pcifront_dev(struct pci_dev *pcidev, |
| 147 | struct xen_pcibk_device *pdev, |
| 148 | unsigned int *domain, |
| 149 | unsigned int *bus, |
| 150 | unsigned int *devfn) |
| 151 | { |
| 152 | if (xen_pcibk_backend && xen_pcibk_backend->find) |
| 153 | return xen_pcibk_backend->find(pcidev, pdev, domain, bus, |
| 154 | devfn); |
| 155 | return -1; |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 156 | } |
| 157 | |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 158 | static inline int xen_pcibk_init_devices(struct xen_pcibk_device *pdev) |
| 159 | { |
| 160 | if (xen_pcibk_backend && xen_pcibk_backend->init) |
| 161 | return xen_pcibk_backend->init(pdev); |
| 162 | return -1; |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 163 | } |
| 164 | |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 165 | static inline int xen_pcibk_publish_pci_roots(struct xen_pcibk_device *pdev, |
| 166 | publish_pci_root_cb cb) |
| 167 | { |
| 168 | if (xen_pcibk_backend && xen_pcibk_backend->publish) |
| 169 | return xen_pcibk_backend->publish(pdev, cb); |
| 170 | return -1; |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 171 | } |
| 172 | |
Konrad Rzeszutek Wilk | 2ebdc42 | 2011-07-11 16:49:41 -0400 | [diff] [blame] | 173 | static inline void xen_pcibk_release_devices(struct xen_pcibk_device *pdev) |
| 174 | { |
| 175 | if (xen_pcibk_backend && xen_pcibk_backend->free) |
| 176 | return xen_pcibk_backend->free(pdev); |
Jan Beulich | 402c5e1 | 2011-09-21 16:22:11 -0400 | [diff] [blame] | 177 | } |
| 178 | |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 179 | /* Handles events from front-end */ |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 180 | irqreturn_t xen_pcibk_handle_event(int irq, void *dev_id); |
| 181 | void xen_pcibk_do_op(struct work_struct *data); |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 182 | |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 183 | int xen_pcibk_xenbus_register(void); |
| 184 | void xen_pcibk_xenbus_unregister(void); |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 185 | |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 186 | extern int verbose_request; |
| 187 | |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 188 | void xen_pcibk_test_and_schedule_op(struct xen_pcibk_device *pdev); |
Konrad Rzeszutek Wilk | 30edc14 | 2009-10-13 17:22:20 -0400 | [diff] [blame] | 189 | #endif |
| 190 | |
Konrad Rzeszutek Wilk | 0513fe9 | 2011-07-19 18:56:39 -0400 | [diff] [blame] | 191 | /* Handles shared IRQs that can to device domain and control domain. */ |
Konrad Rzeszutek Wilk | a92336a | 2011-07-19 19:40:51 -0400 | [diff] [blame] | 192 | void xen_pcibk_irq_handler(struct pci_dev *dev, int reset); |