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Diffstat (limited to 'src/vlib/pci/pci.h')
| -rw-r--r-- | src/vlib/pci/pci.h | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/src/vlib/pci/pci.h b/src/vlib/pci/pci.h new file mode 100644 index 00000000000..811a6ff2336 --- /dev/null +++ b/src/vlib/pci/pci.h @@ -0,0 +1,251 @@ +/* + * Copyright (c) 2016 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +/* + * pci.h: PCI definitions. + * + * Copyright (c) 2008 Eliot Dresselhaus + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE + * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION + * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +#ifndef included_vlib_pci_h +#define included_vlib_pci_h + +#include <vlib/vlib.h> +#include <vlib/pci/pci_config.h> + +typedef CLIB_PACKED (union + { + struct + { +u16 domain; u8 bus; u8 slot: 5; u8 function:3;}; + u32 as_u32;}) vlib_pci_addr_t; + +typedef struct vlib_pci_device +{ + /* Operating system handle for this device. */ + uword os_handle; + + vlib_pci_addr_t bus_address; + + /* First 64 bytes of configuration space. */ + union + { + pci_config_type0_regs_t config0; + pci_config_type1_regs_t config1; + u8 config_data[256]; + }; + + /* Interrupt handler */ + void (*interrupt_handler) (struct vlib_pci_device * dev); + + /* Driver name */ + u8 *driver_name; + + /* Numa Node */ + int numa_node; + + /* Device data */ + u16 device_class; + u16 vendor_id; + u16 device_id; + + /* Vital Product Data */ + u8 *product_name; + u8 *vpd_r; + u8 *vpd_w; + + /* Private data */ + uword private_data; + +} vlib_pci_device_t; + +typedef struct +{ + u16 vendor_id, device_id; +} pci_device_id_t; + +typedef struct _pci_device_registration +{ + /* Driver init function. */ + clib_error_t *(*init_function) (vlib_main_t * vm, vlib_pci_device_t * dev); + + /* Interrupt handler */ + void (*interrupt_handler) (vlib_pci_device_t * dev); + + /* List of registrations */ + struct _pci_device_registration *next_registration; + + /* Vendor/device ids supported by this driver. */ + pci_device_id_t supported_devices[]; +} pci_device_registration_t; + +/* Pool of PCI devices. */ +typedef struct +{ + vlib_main_t *vlib_main; + vlib_pci_device_t *pci_devs; + pci_device_registration_t *pci_device_registrations; + uword *pci_dev_index_by_pci_addr; +} vlib_pci_main_t; + +extern vlib_pci_main_t pci_main; + +#define PCI_REGISTER_DEVICE(x,...) \ + __VA_ARGS__ pci_device_registration_t x; \ +static void __vlib_add_pci_device_registration_##x (void) \ + __attribute__((__constructor__)) ; \ +static void __vlib_add_pci_device_registration_##x (void) \ +{ \ + vlib_pci_main_t * pm = &pci_main; \ + x.next_registration = pm->pci_device_registrations; \ + pm->pci_device_registrations = &x; \ +} \ +__VA_ARGS__ pci_device_registration_t x + +clib_error_t *vlib_pci_bind_to_uio (vlib_pci_device_t * d, + char *uio_driver_name); + +/* Configuration space read/write. */ +clib_error_t *vlib_pci_read_write_config (vlib_pci_device_t * dev, + vlib_read_or_write_t read_or_write, + uword address, + void *data, u32 n_bytes); + +#define _(t) \ +static inline clib_error_t * \ +vlib_pci_read_config_##t (vlib_pci_device_t * dev, \ + uword address, t * data) \ +{ \ + return vlib_pci_read_write_config (dev, VLIB_READ,address, data, \ + sizeof (data[0])); \ +} + +_(u32); +_(u16); +_(u8); + +#undef _ + +#define _(t) \ +static inline clib_error_t * \ +vlib_pci_write_config_##t (vlib_pci_device_t * dev, uword address, \ + t * data) \ +{ \ + return vlib_pci_read_write_config (dev, VLIB_WRITE, \ + address, data, sizeof (data[0])); \ +} + +_(u32); +_(u16); +_(u8); + +#undef _ + +static inline clib_error_t * +vlib_pci_intr_enable (vlib_pci_device_t * dev) +{ + u16 command; + clib_error_t *err; + + err = vlib_pci_read_config_u16 (dev, 4, &command); + + if (err) + return err; + + command &= ~PCI_COMMAND_INTX_DISABLE; + + return vlib_pci_write_config_u16 (dev, 4, &command); +} + +static inline clib_error_t * +vlib_pci_intr_disable (vlib_pci_device_t * dev) +{ + u16 command; + clib_error_t *err; + + err = vlib_pci_read_config_u16 (dev, 4, &command); + + if (err) + return err; + + command |= PCI_COMMAND_INTX_DISABLE; + + return vlib_pci_write_config_u16 (dev, 4, &command); +} + +static inline clib_error_t * +vlib_pci_bus_master_enable (vlib_pci_device_t * dev) +{ + clib_error_t *err; + u16 command; + + /* Set bus master enable (BME) */ + err = vlib_pci_read_config_u16 (dev, 4, &command); + + if (err) + return err; + + if (!(command & PCI_COMMAND_BUS_MASTER)) + return 0; + + command |= PCI_COMMAND_BUS_MASTER; + + return vlib_pci_write_config_u16 (dev, 4, &command); +} + +clib_error_t *vlib_pci_map_resource (vlib_pci_device_t * dev, u32 resource, + void **result); + +clib_error_t *vlib_pci_map_resource_fixed (vlib_pci_device_t * dev, + u32 resource, u8 * addr, + void **result); + +vlib_pci_device_t *vlib_get_pci_device (vlib_pci_addr_t * addr); +/* Free's device. */ +void vlib_pci_free_device (vlib_pci_device_t * dev); + +unformat_function_t unformat_vlib_pci_addr; +format_function_t format_vlib_pci_addr; +format_function_t format_vlib_pci_handle; +format_function_t format_vlib_pci_link_speed; +format_function_t format_vlib_pci_vpd; + +#endif /* included_vlib_pci_h */ + +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |