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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 */
54 #define RTE_INTR_EVENT_ADD 1UL
55 #define RTE_INTR_EVENT_DEL 2UL
57 typedef void (*rte_intr_event_cb_t)(int fd, void *arg);
59 struct rte_epoll_data {
60 uint32_t event; /**< event type */
61 void *data; /**< User data */
62 rte_intr_event_cb_t cb_fun; /**< IN: callback fun */
63 void *cb_arg; /**< IN: callback arg */
67 RTE_EPOLL_INVALID = 0,
72 /** interrupt epoll event obj, taken by epoll_event.ptr */
73 struct rte_epoll_event {
74 volatile uint32_t status; /**< OUT: event status */
75 int fd; /**< OUT: event fd */
76 int epfd; /**< OUT: epoll instance the ev associated with */
77 struct rte_epoll_data epdata;
80 /** Handle for interrupts. */
81 struct rte_intr_handle {
83 int vfio_dev_fd; /**< VFIO device file descriptor */
84 int uio_cfg_fd; /**< UIO config file descriptor
85 for uio_pci_generic */
87 int fd; /**< interrupt event file descriptor */
88 enum rte_intr_handle_type type; /**< handle type */
89 uint32_t max_intr; /**< max interrupt requested */
90 uint32_t nb_efd; /**< number of available efd(event fd) */
91 int efds[RTE_MAX_RXTX_INTR_VEC_ID]; /**< intr vectors/efds mapping */
92 struct rte_epoll_event elist[RTE_MAX_RXTX_INTR_VEC_ID];
93 /**< intr vector epoll event */
94 int *intr_vec; /**< intr vector number array */
97 #define RTE_EPOLL_PER_THREAD -1 /**< to hint using per thread epfd */
100 * It waits for events on the epoll instance.
103 * Epoll instance fd on which the caller wait for events.
105 * Memory area contains the events that will be available for the caller.
107 * Up to maxevents are returned, must greater than zero.
109 * Specifying a timeout of -1 causes a block indefinitely.
110 * Specifying a timeout equal to zero cause to return immediately.
112 * - On success, returns the number of available event.
113 * - On failure, a negative value.
116 rte_epoll_wait(int epfd, struct rte_epoll_event *events,
117 int maxevents, int timeout);
120 * It performs control operations on epoll instance referred by the epfd.
121 * It requests that the operation op be performed for the target fd.
124 * Epoll instance fd on which the caller perform control operations.
126 * The operation be performed for the target fd.
128 * The target fd on which the control ops perform.
130 * Describes the object linked to the fd.
131 * Note: The caller must take care the object deletion after CTL_DEL.
133 * - On success, zero.
134 * - On failure, a negative value.
137 rte_epoll_ctl(int epfd, int op, int fd,
138 struct rte_epoll_event *event);
141 * The function returns the per thread epoll instance.
144 * epfd the epoll instance referred to.
147 rte_intr_tls_epfd(void);
151 * Pointer to the interrupt handle.
153 * Epoll instance fd which the intr vector associated to.
155 * The operation be performed for the vector.
156 * Operation type of {ADD, DEL}.
158 * RX intr vector number added to the epoll instance wait list.
162 * - On success, zero.
163 * - On failure, a negative value.
166 rte_intr_rx_ctl(struct rte_intr_handle *intr_handle,
167 int epfd, int op, unsigned int vec, void *data);
170 * It enables the packet I/O interrupt event if it's necessary.
171 * It creates event fd for each interrupt vector when MSIX is used,
172 * otherwise it multiplexes a single event fd.
175 * Pointer to the interrupt handle.
177 * Number of interrupt vector trying to enable.
179 * - On success, zero.
180 * - On failure, a negative value.
183 rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd);
186 * It disables the packet I/O interrupt event.
187 * It deletes registered eventfds and closes the open fds.
190 * Pointer to the interrupt handle.
193 rte_intr_efd_disable(struct rte_intr_handle *intr_handle);
196 * The packet I/O interrupt on datapath is enabled or not.
199 * Pointer to the interrupt handle.
202 rte_intr_dp_is_en(struct rte_intr_handle *intr_handle);
205 * The interrupt handle instance allows other causes or not.
206 * Other causes stand for any none packet I/O interrupts.
209 * Pointer to the interrupt handle.
212 rte_intr_allow_others(struct rte_intr_handle *intr_handle);
214 #endif /* _RTE_LINUXAPP_INTERRUPTS_H_ */