1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
2 /* QLogic qed NIC Driver
3  * Copyright (c) 2015-2017  QLogic Corporation
4  */
5 
6 #ifndef _QED_OOO_H
7 #define _QED_OOO_H
8 #include <linux/types.h>
9 #include <linux/list.h>
10 #include <linux/slab.h>
11 #include "qed.h"
12 
13 #define QED_MAX_NUM_ISLES	256
14 #define QED_MAX_NUM_OOO_HISTORY_ENTRIES	512
15 
16 #define QED_OOO_LEFT_BUF	0
17 #define QED_OOO_RIGHT_BUF	1
18 
19 struct qed_ooo_buffer {
20 	struct list_head list_entry;
21 	void *rx_buffer_virt_addr;
22 	dma_addr_t rx_buffer_phys_addr;
23 	u32 rx_buffer_size;
24 	u16 packet_length;
25 	u16 parse_flags;
26 	u16 vlan;
27 	u8 placement_offset;
28 };
29 
30 struct qed_ooo_isle {
31 	struct list_head list_entry;
32 	struct list_head buffers_list;
33 };
34 
35 struct qed_ooo_archipelago {
36 	struct list_head isles_list;
37 };
38 
39 struct qed_ooo_history {
40 	struct ooo_opaque *p_cqes;
41 	u32 head_idx;
42 	u32 num_of_cqes;
43 };
44 
45 struct qed_ooo_info {
46 	struct list_head free_buffers_list;
47 	struct list_head ready_buffers_list;
48 	struct list_head free_isles_list;
49 	struct qed_ooo_archipelago *p_archipelagos_mem;
50 	struct qed_ooo_isle *p_isles_mem;
51 	struct qed_ooo_history ooo_history;
52 	u32 cur_isles_number;
53 	u32 max_isles_number;
54 	u32 gen_isles_number;
55 	u16 max_num_archipelagos;
56 	u16 cid_base;
57 };
58 
59 #if IS_ENABLED(CONFIG_QED_OOO)
60 void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
61 				struct qed_ooo_info *p_ooo_info,
62 				struct ooo_opaque *p_cqe);
63 
64 int qed_ooo_alloc(struct qed_hwfn *p_hwfn);
65 
66 void qed_ooo_setup(struct qed_hwfn *p_hwfn);
67 
68 void qed_ooo_free(struct qed_hwfn *p_hwfn);
69 
70 void qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
71 				      struct qed_ooo_info *p_ooo_info,
72 				      u32 cid);
73 
74 void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
75 			       struct qed_ooo_info *p_ooo_info);
76 
77 void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
78 			     struct qed_ooo_info *p_ooo_info,
79 			     struct qed_ooo_buffer *p_buffer);
80 
81 struct qed_ooo_buffer *
82 qed_ooo_get_free_buffer(struct qed_hwfn *p_hwfn,
83 			struct qed_ooo_info *p_ooo_info);
84 
85 void qed_ooo_put_ready_buffer(struct qed_hwfn *p_hwfn,
86 			      struct qed_ooo_info *p_ooo_info,
87 			      struct qed_ooo_buffer *p_buffer, u8 on_tail);
88 
89 struct qed_ooo_buffer *
90 qed_ooo_get_ready_buffer(struct qed_hwfn *p_hwfn,
91 			 struct qed_ooo_info *p_ooo_info);
92 
93 void qed_ooo_delete_isles(struct qed_hwfn *p_hwfn,
94 			  struct qed_ooo_info *p_ooo_info,
95 			  u32 cid, u8 drop_isle, u8 drop_size);
96 
97 void qed_ooo_add_new_isle(struct qed_hwfn *p_hwfn,
98 			  struct qed_ooo_info *p_ooo_info,
99 			  u32 cid,
100 			  u8 ooo_isle, struct qed_ooo_buffer *p_buffer);
101 
102 void qed_ooo_add_new_buffer(struct qed_hwfn *p_hwfn,
103 			    struct qed_ooo_info *p_ooo_info,
104 			    u32 cid,
105 			    u8 ooo_isle,
106 			    struct qed_ooo_buffer *p_buffer, u8 buffer_side);
107 
108 void qed_ooo_join_isles(struct qed_hwfn *p_hwfn,
109 			struct qed_ooo_info *p_ooo_info, u32 cid,
110 			u8 left_isle);
111 #else /* IS_ENABLED(CONFIG_QED_ISCSI) */
112 static inline void qed_ooo_save_history_entry(struct qed_hwfn *p_hwfn,
113 					      struct qed_ooo_info *p_ooo_info,
114 					      struct ooo_opaque *p_cqe) {}
115 
116 static inline int qed_ooo_alloc(struct qed_hwfn *p_hwfn)
117 {
118 	return -EINVAL;
119 }
120 
121 static inline void qed_ooo_setup(struct qed_hwfn *p_hwfn) {}
122 
123 static inline void qed_ooo_free(struct qed_hwfn *p_hwfn) {}
124 
125 static inline void
126 qed_ooo_release_connection_isles(struct qed_hwfn *p_hwfn,
127 				 struct qed_ooo_info *p_ooo_info,
128 				 u32 cid) {}
129 
130 static inline void qed_ooo_release_all_isles(struct qed_hwfn *p_hwfn,
131 					     struct qed_ooo_info *p_ooo_info)
132 					     {}
133 
134 static inline void qed_ooo_put_free_buffer(struct qed_hwfn *p_hwfn,
135 					   struct qed_ooo_info *p_ooo_info,
136 					   struct qed_ooo_buffer *p_buffer) {}
137 
138 static inline struct qed_ooo_buffer *
139 qed_ooo_get_free_buffer(struct qed_hwfn *p_hwfn,
140 			struct qed_ooo_info *p_ooo_info) { return NULL; }
141 
142 static inline void qed_ooo_put_ready_buffer(struct qed_hwfn *p_hwfn,
143 					    struct qed_ooo_info *p_ooo_info,
144 					    struct qed_ooo_buffer *p_buffer,
145 					    u8 on_tail) {}
146 
147 static inline struct qed_ooo_buffer *
148 qed_ooo_get_ready_buffer(struct qed_hwfn *p_hwfn,
149 			 struct qed_ooo_info *p_ooo_info) { return NULL; }
150 
151 static inline void qed_ooo_delete_isles(struct qed_hwfn *p_hwfn,
152 					struct qed_ooo_info *p_ooo_info,
153 					u32 cid, u8 drop_isle, u8 drop_size) {}
154 
155 static inline void qed_ooo_add_new_isle(struct qed_hwfn *p_hwfn,
156 					struct qed_ooo_info *p_ooo_info,
157 					u32 cid, u8 ooo_isle,
158 					struct qed_ooo_buffer *p_buffer) {}
159 
160 static inline void qed_ooo_add_new_buffer(struct qed_hwfn *p_hwfn,
161 					  struct qed_ooo_info *p_ooo_info,
162 					  u32 cid, u8 ooo_isle,
163 					  struct qed_ooo_buffer *p_buffer,
164 					  u8 buffer_side) {}
165 
166 static inline void qed_ooo_join_isles(struct qed_hwfn *p_hwfn,
167 				      struct qed_ooo_info *p_ooo_info, u32 cid,
168 				      u8 left_isle) {}
169 #endif /* IS_ENABLED(CONFIG_QED_ISCSI) */
170 
171 #endif
172