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hc
2024-05-14 bedbef8ad3e75a304af6361af235302bcc61d06b 
 kernel/drivers/infiniband/ulp/srp/ib_srp.h
....@@ -44,7 +44,6 @@
4444 #include <rdma/ib_verbs.h>
4545 #include <rdma/ib_sa.h>
4646 #include <rdma/ib_cm.h>
47
-#include <rdma/ib_fmr_pool.h>
4847 #include <rdma/rdma_cm.h>
4948 
5049 enum {
....@@ -63,10 +62,23 @@
6362 	SRP_DEFAULT_CMD_SQ_SIZE = SRP_DEFAULT_QUEUE_SIZE - SRP_RSP_SQ_SIZE -
6463 				  SRP_TSK_MGMT_SQ_SIZE,
6564 
66
-	SRP_TAG_NO_REQ		= ~0U,
67
-	SRP_TAG_TSK_MGMT	= 1U << 31,
68
-
6965 	SRP_MAX_PAGES_PER_MR	= 512,
66
+
67
+	SRP_MAX_ADD_CDB_LEN	= 16,
68
+
69
+	SRP_MAX_IMM_SGE		= 2,
70
+	SRP_MAX_SGE		= SRP_MAX_IMM_SGE + 1,
71
+	/*
72
+	 * Choose the immediate data offset such that a 32 byte CDB still fits.
73
+	 */
74
+	SRP_IMM_DATA_OFFSET	= sizeof(struct srp_cmd) +
75
+				  SRP_MAX_ADD_CDB_LEN +
76
+				  sizeof(struct srp_imm_buf),
77
+};
78
+
79
+enum {
80
+	SRP_TAG_NO_REQ		= ~0U,
81
+	SRP_TAG_TSK_MGMT	= BIT(31),
7082 };
7183 
7284 enum srp_target_state {
....@@ -84,8 +96,7 @@
8496 /*
8597  * @mr_page_mask: HCA memory registration page mask.
8698  * @mr_page_size: HCA memory registration page size.
87
- * @mr_max_size: Maximum size in bytes of a single FMR / FR registration
88
- *   request.
99
+ * @mr_max_size: Maximum size in bytes of a single FR registration request.
89100  */
90101 struct srp_device {
91102 	struct list_head	dev_list;
....@@ -96,9 +107,7 @@
96107 	int			mr_page_size;
97108 	int			mr_max_size;
98109 	int			max_pages_per_mr;
99
-	bool			has_fmr;
100110 	bool			has_fr;
101
-	bool			use_fmr;
102111 	bool			use_fast_reg;
103112 };
104113 
....@@ -116,11 +125,7 @@
116125 struct srp_request {
117126 	struct scsi_cmnd       *scmnd;
118127 	struct srp_iu	       *cmd;
119
-	union {
120
-		struct ib_pool_fmr **fmr_list;
121
-		struct srp_fr_desc **fr_list;
122
-	};
123
-	u64		       *map_page;
128
+	struct srp_fr_desc     **fr_list;
124129 	struct srp_direct_buf  *indirect_desc;
125130 	dma_addr_t		indirect_dma_addr;
126131 	short			nmdesc;
....@@ -130,6 +135,8 @@
130135 /**
131136  * struct srp_rdma_ch
132137  * @comp_vector: Completion vector used by this RDMA channel.
138
+ * @max_it_iu_len: Maximum initiator-to-target information unit length.
139
+ * @max_ti_iu_len: Maximum target-to-initiator information unit length.
133140  */
134141 struct srp_rdma_ch {
135142 	/* These are RW in the hot path, and commonly used together */
....@@ -142,10 +149,11 @@
142149 	struct ib_cq	       *send_cq;
143150 	struct ib_cq	       *recv_cq;
144151 	struct ib_qp	       *qp;
145
-	union {
146
-		struct ib_fmr_pool     *fmr_pool;
147
-		struct srp_fr_pool     *fr_pool;
148
-	};
152
+	struct srp_fr_pool     *fr_pool;
153
+	uint32_t		max_it_iu_len;
154
+	uint32_t		max_ti_iu_len;
155
+	u8			max_imm_sge;
156
+	bool			use_imm_data;
149157 
150158 	/* Everything above this point is used in the hot path of
151159 	 * command processing. Try to keep them packed into cachelines.
....@@ -169,7 +177,6 @@
169177 	struct srp_iu	      **tx_ring;
170178 	struct srp_iu	      **rx_ring;
171179 	struct srp_request     *req_ring;
172
-	int			max_ti_iu_len;
173180 	int			comp_vector;
174181 
175182 	u64			tsk_mgmt_tag;
....@@ -194,7 +201,7 @@
194201 	u32			ch_count;
195202 	u32			lkey;
196203 	enum srp_target_state	state;
197
-	unsigned int		max_iu_len;
204
+	uint32_t		max_it_iu_size;
198205 	unsigned int		cmd_sg_cnt;
199206 	unsigned int		indirect_size;
200207 	bool			allow_ext_sg;
....@@ -231,11 +238,13 @@
231238 			union {
232239 				struct sockaddr_in	ip4;
233240 				struct sockaddr_in6	ip6;
241
+				struct sockaddr		sa;
234242 				struct sockaddr_storage ss;
235243 			} src;
236244 			union {
237245 				struct sockaddr_in	ip4;
238246 				struct sockaddr_in6	ip6;
247
+				struct sockaddr		sa;
239248 				struct sockaddr_storage ss;
240249 			} dst;
241250 			bool src_specified;
....@@ -259,6 +268,8 @@
259268 	void		       *buf;
260269 	size_t			size;
261270 	enum dma_data_direction	direction;
271
+	u32			num_sge;
272
+	struct ib_sge		sge[SRP_MAX_SGE];
262273 	struct ib_cqe		cqe;
263274 };
264275 
....@@ -289,7 +300,7 @@
289300 	int			max_page_list_len;
290301 	spinlock_t		lock;
291302 	struct list_head	free_list;
292
-	struct srp_fr_desc	desc[0];
303
+	struct srp_fr_desc	desc[];
293304 };
294305 
295306 /**
....@@ -299,19 +310,15 @@
299310  * @pages:	    Array with DMA addresses of pages being considered for
300311  *		    memory registration.
301312  * @base_dma_addr:  DMA address of the first page that has not yet been mapped.
302
- * @dma_len:	    Number of bytes that will be registered with the next
303
- *		    FMR or FR memory registration call.
313
+ * @dma_len:	    Number of bytes that will be registered with the next FR
314
+ *                  memory registration call.
304315  * @total_len:	    Total number of bytes in the sg-list being mapped.
305316  * @npages:	    Number of page addresses in the pages[] array.
306
- * @nmdesc:	    Number of FMR or FR memory descriptors used for mapping.
317
+ * @nmdesc:	    Number of FR memory descriptors used for mapping.
307318  * @ndesc:	    Number of SRP buffer descriptors that have been filled in.
308319  */
309320 struct srp_map_state {
310321 	union {
311
-		struct {
312
-			struct ib_pool_fmr **next;
313
-			struct ib_pool_fmr **end;
314
-		} fmr;
315322 		struct {
316323 			struct srp_fr_desc **next;
317324 			struct srp_fr_desc **end;