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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
42 #define RTE_INTR_VEC_ZERO_OFFSET 0
43 #define RTE_INTR_VEC_RXTX_OFFSET 1
45 enum rte_intr_handle_type {
46 RTE_INTR_HANDLE_UNKNOWN = 0,
47 RTE_INTR_HANDLE_UIO, /**< uio device handle */
48 RTE_INTR_HANDLE_UIO_INTX, /**< uio generic handle */
49 RTE_INTR_HANDLE_VFIO_LEGACY, /**< vfio device handle (legacy) */
50 RTE_INTR_HANDLE_VFIO_MSI, /**< vfio device handle (MSI) */
51 RTE_INTR_HANDLE_VFIO_MSIX, /**< vfio device handle (MSIX) */
52 RTE_INTR_HANDLE_ALARM, /**< alarm handle */
53 RTE_INTR_HANDLE_EXT, /**< external handler */
54 RTE_INTR_HANDLE_VDEV, /**< virtual device */
58 #define RTE_INTR_EVENT_ADD 1UL
59 #define RTE_INTR_EVENT_DEL 2UL
61 typedef void (*rte_intr_event_cb_t)(int fd, void *arg);
63 struct rte_epoll_data {
64 uint32_t event; /**< event type */
65 void *data; /**< User data */
66 rte_intr_event_cb_t cb_fun; /**< IN: callback fun */
67 void *cb_arg; /**< IN: callback arg */
71 RTE_EPOLL_INVALID = 0,
76 /** interrupt epoll event obj, taken by epoll_event.ptr */
77 struct rte_epoll_event {
78 volatile uint32_t status; /**< OUT: event status */
79 int fd; /**< OUT: event fd */
80 int epfd; /**< OUT: epoll instance the ev associated with */
81 struct rte_epoll_data epdata;
84 /** Handle for interrupts. */
85 struct rte_intr_handle {
88 int vfio_dev_fd; /**< VFIO device file descriptor */
89 int uio_cfg_fd; /**< UIO config file descriptor
90 for uio_pci_generic */
92 int fd; /**< interrupt event file descriptor */
93 enum rte_intr_handle_type type; /**< handle type */
94 uint32_t max_intr; /**< max interrupt requested */
95 uint32_t nb_efd; /**< number of available efd(event fd) */
96 int efds[RTE_MAX_RXTX_INTR_VEC_ID]; /**< intr vectors/efds mapping */
97 struct rte_epoll_event elist[RTE_MAX_RXTX_INTR_VEC_ID];
98 /**< intr vector epoll event */
99 int *intr_vec; /**< intr vector number array */
102 #define RTE_EPOLL_PER_THREAD -1 /**< to hint using per thread epfd */
105 * It waits for events on the epoll instance.
108 * Epoll instance fd on which the caller wait for events.
110 * Memory area contains the events that will be available for the caller.
112 * Up to maxevents are returned, must greater than zero.
114 * Specifying a timeout of -1 causes a block indefinitely.
115 * Specifying a timeout equal to zero cause to return immediately.
117 * - On success, returns the number of available event.
118 * - On failure, a negative value.
121 rte_epoll_wait(int epfd, struct rte_epoll_event *events,
122 int maxevents, int timeout);
125 * It performs control operations on epoll instance referred by the epfd.
126 * It requests that the operation op be performed for the target fd.
129 * Epoll instance fd on which the caller perform control operations.
131 * The operation be performed for the target fd.
133 * The target fd on which the control ops perform.
135 * Describes the object linked to the fd.
136 * Note: The caller must take care the object deletion after CTL_DEL.
138 * - On success, zero.
139 * - On failure, a negative value.
142 rte_epoll_ctl(int epfd, int op, int fd,
143 struct rte_epoll_event *event);
146 * The function returns the per thread epoll instance.
149 * epfd the epoll instance referred to.
152 rte_intr_tls_epfd(void);
156 * Pointer to the interrupt handle.
158 * Epoll instance fd which the intr vector associated to.
160 * The operation be performed for the vector.
161 * Operation type of {ADD, DEL}.
163 * RX intr vector number added to the epoll instance wait list.
167 * - On success, zero.
168 * - On failure, a negative value.
171 rte_intr_rx_ctl(struct rte_intr_handle *intr_handle,
172 int epfd, int op, unsigned int vec, void *data);
175 * It deletes registered eventfds.
178 * Pointer to the interrupt handle.
181 rte_intr_free_epoll_fd(struct rte_intr_handle *intr_handle);
184 * It enables the packet I/O interrupt event if it's necessary.
185 * It creates event fd for each interrupt vector when MSIX is used,
186 * otherwise it multiplexes a single event fd.
189 * Pointer to the interrupt handle.
191 * Number of interrupt vector trying to enable.
192 * The value 0 is not allowed.
194 * - On success, zero.
195 * - On failure, a negative value.
198 rte_intr_efd_enable(struct rte_intr_handle *intr_handle, uint32_t nb_efd);
201 * It disables the packet I/O interrupt event.
202 * It deletes registered eventfds and closes the open fds.
205 * Pointer to the interrupt handle.
208 rte_intr_efd_disable(struct rte_intr_handle *intr_handle);
211 * The packet I/O interrupt on datapath is enabled or not.
214 * Pointer to the interrupt handle.
217 rte_intr_dp_is_en(struct rte_intr_handle *intr_handle);
220 * The interrupt handle instance allows other causes or not.
221 * Other causes stand for any none packet I/O interrupts.
224 * Pointer to the interrupt handle.
227 rte_intr_allow_others(struct rte_intr_handle *intr_handle);
230 * The multiple interrupt vector capability of interrupt handle instance.
231 * It returns zero if no multiple interrupt vector support.
234 * Pointer to the interrupt handle.
237 rte_intr_cap_multiple(struct rte_intr_handle *intr_handle);
239 #endif /* _RTE_LINUXAPP_INTERRUPTS_H_ */