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34 #ifndef _RTE_INTERRUPTS_H_
35 #error "don't include this file directly, please include generic <rte_interrupts.h>"
38 #ifndef _RTE_LINUXAPP_INTERRUPTS_H_
39 #define _RTE_LINUXAPP_INTERRUPTS_H_
41 #define RTE_MAX_RXTX_INTR_VEC_ID 32
43 enum rte_intr_handle_type {
44 RTE_INTR_HANDLE_UNKNOWN = 0,
45 RTE_INTR_HANDLE_UIO, /**< uio device handle */
46 RTE_INTR_HANDLE_UIO_INTX, /**< uio generic handle */
47 RTE_INTR_HANDLE_VFIO_LEGACY, /**< vfio device handle (legacy) */
48 RTE_INTR_HANDLE_VFIO_MSI, /**< vfio device handle (MSI) */
49 RTE_INTR_HANDLE_VFIO_MSIX, /**< vfio device handle (MSIX) */
50 RTE_INTR_HANDLE_ALARM, /**< alarm handle */
51 RTE_INTR_HANDLE_EXT, /**< external handler */
55 #define RTE_INTR_EVENT_ADD 1UL
56 #define RTE_INTR_EVENT_DEL 2UL
58 typedef void (*rte_intr_event_cb_t)(int fd, void *arg);
60 struct rte_epoll_data {
61 uint32_t event; /**< event type */
62 void *data; /**< User data */
63 rte_intr_event_cb_t cb_fun; /**< IN: callback fun */
64 void *cb_arg; /**< IN: callback arg */
68 RTE_EPOLL_INVALID = 0,
73 /** interrupt epoll event obj, taken by epoll_event.ptr */
74 struct rte_epoll_event {
75 volatile uint32_t status; /**< OUT: event status */
76 int fd; /**< OUT: event fd */
77 int epfd; /**< OUT: epoll instance the ev associated with */
78 struct rte_epoll_data epdata;
81 /** Handle for interrupts. */
82 struct rte_intr_handle {
84 int vfio_dev_fd; /**< VFIO device file descriptor */
85 int uio_cfg_fd; /**< UIO config file descriptor
86 for uio_pci_generic */
88 int fd; /**< interrupt event file descriptor */
89 enum rte_intr_handle_type type; /**< handle type */
90 uint32_t max_intr; /**< max interrupt requested */
91 uint32_t nb_efd; /**< number of available efd(event fd) */
92 int efds[RTE_MAX_RXTX_INTR_VEC_ID]; /**< intr vectors/efds mapping */
93 struct rte_epoll_event elist[RTE_MAX_RXTX_INTR_VEC_ID];
94 /**< intr vector epoll event */
95 int *intr_vec; /**< intr vector number array */
98 #define RTE_EPOLL_PER_THREAD -1 /**< to hint using per thread epfd */
101 * It waits for events on the epoll instance.
104 * Epoll instance fd on which the caller wait for events.
106 * Memory area contains the events that will be available for the caller.
108 * Up to maxevents are returned, must greater than zero.
110 * Specifying a timeout of -1 causes a block indefinitely.
111 * Specifying a timeout equal to zero cause to return immediately.
113 * - On success, returns the number of available event.
114 * - On failure, a negative value.
117 rte_epoll_wait(int epfd, struct rte_epoll_event *events,
118 int maxevents, int timeout);
121 * It performs control operations on epoll instance referred by the epfd.
122 * It requests that the operation op be performed for the target fd.
125 * Epoll instance fd on which the caller perform control operations.
127 * The operation be performed for the target fd.
129 * The target fd on which the control ops perform.
131 * Describes the object linked to the fd.
132 * Note: The caller must take care the object deletion after CTL_DEL.
134 * - On success, zero.
135 * - On failure, a negative value.
138 rte_epoll_ctl(int epfd, int op, int fd,
139 struct rte_epoll_event *event);
142 * The function returns the per thread epoll instance.
145 * epfd the epoll instance referred to.
148 rte_intr_tls_epfd(void);
152 * Pointer to the interrupt handle.
154 * Epoll instance fd which the intr vector associated to.
156 * The operation be performed for the vector.
157 * Operation type of {ADD, DEL}.
159 * RX intr vector number added to the epoll instance wait list.
163 * - On success, zero.
164 * - On failure, a negative value.
167 rte_intr_rx_ctl(struct rte_intr_handle *intr_handle,
168 int epfd, int op, unsigned int vec, void *data);
171 * It enables the packet I/O interrupt event if it's necessary.
172 * It creates event fd for each interrupt vector when MSIX is used,
173 * otherwise it multiplexes a single event fd.
176 * Pointer to the interrupt handle.
178 * Number of interrupt vector trying to enable.
180 * - On success, zero.
181 * - On failure, a negative value.
184 rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd);
187 * It disables the packet I/O interrupt event.
188 * It deletes registered eventfds and closes the open fds.
191 * Pointer to the interrupt handle.
194 rte_intr_efd_disable(struct rte_intr_handle *intr_handle);
197 * The packet I/O interrupt on datapath is enabled or not.
200 * Pointer to the interrupt handle.
203 rte_intr_dp_is_en(struct rte_intr_handle *intr_handle);
206 * The interrupt handle instance allows other causes or not.
207 * Other causes stand for any none packet I/O interrupts.
210 * Pointer to the interrupt handle.
213 rte_intr_allow_others(struct rte_intr_handle *intr_handle);
215 #endif /* _RTE_LINUXAPP_INTERRUPTS_H_ */