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Commit b12349ae authored by Dean Luick's avatar Dean Luick Committed by Doug Ledford
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IB/hfi1: Create a routine to set a receive side mapping rule 



Move the rule setting code into its own routine for improved
searchability and reuse.

Reviewed-by: default avatarDennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: default avatarDean Luick <dean.luick@intel.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 4a818bed

drivers/staging/rdma/hfi1/chip.c

+57 −18
Original line number Diff line number Diff line
@@ -13429,6 +13429,21 @@ struct rsm_map_table { 
	unsigned int used;

};



struct rsm_rule_data {

	u8 offset;

	u8 pkt_type;

	u32 field1_off;

	u32 field2_off;

	u32 index1_off;

	u32 index1_width;

	u32 index2_off;

	u32 index2_width;

	u32 mask1;

	u32 value1;

	u32 mask2;

	u32 value2;

};



/*

 * Return an initialized RMT map table for users to fill in.  OK if it

 * returns NULL, indicating no table.
@@ -13466,6 +13481,30 @@ static void complete_rsm_map_table(struct hfi1_devdata *dd, 
	}

}



/*

 * Add a receive side mapping rule.

 */

static void add_rsm_rule(struct hfi1_devdata *dd, u8 rule_index,

			 struct rsm_rule_data *rrd)

{

	write_csr(dd, RCV_RSM_CFG + (8 * rule_index),

		  (u64)rrd->offset << RCV_RSM_CFG_OFFSET_SHIFT |

		  1ull << rule_index | /* enable bit */

		  (u64)rrd->pkt_type << RCV_RSM_CFG_PACKET_TYPE_SHIFT);

	write_csr(dd, RCV_RSM_SELECT + (8 * rule_index),

		  (u64)rrd->field1_off << RCV_RSM_SELECT_FIELD1_OFFSET_SHIFT |

		  (u64)rrd->field2_off << RCV_RSM_SELECT_FIELD2_OFFSET_SHIFT |

		  (u64)rrd->index1_off << RCV_RSM_SELECT_INDEX1_OFFSET_SHIFT |

		  (u64)rrd->index1_width << RCV_RSM_SELECT_INDEX1_WIDTH_SHIFT |

		  (u64)rrd->index2_off << RCV_RSM_SELECT_INDEX2_OFFSET_SHIFT |

		  (u64)rrd->index2_width << RCV_RSM_SELECT_INDEX2_WIDTH_SHIFT);

	write_csr(dd, RCV_RSM_MATCH + (8 * rule_index),

		  (u64)rrd->mask1 << RCV_RSM_MATCH_MASK1_SHIFT |

		  (u64)rrd->value1 << RCV_RSM_MATCH_VALUE1_SHIFT |

		  (u64)rrd->mask2 << RCV_RSM_MATCH_MASK2_SHIFT |

		  (u64)rrd->value2 << RCV_RSM_MATCH_VALUE2_SHIFT);

}



/* return the number of RSM map table entries that will be used for QOS */

static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp,

			   unsigned int *np)
@@ -13526,6 +13565,7 @@ static int qos_rmt_entries(struct hfi1_devdata *dd, unsigned int *mp, 
 */

static void init_qos(struct hfi1_devdata *dd, struct rsm_map_table *rmt)

{

	struct rsm_rule_data rrd;

	unsigned qpns_per_vl, ctxt, i, qpn, n = 1, m;

	unsigned int rmt_entries;

	u64 reg;
@@ -13565,24 +13605,23 @@ static void init_qos(struct hfi1_devdata *dd, struct rsm_map_table *rmt) 
		}

		ctxt += krcvqs[i];

	}



	rrd.offset = rmt->used;

	rrd.pkt_type = 2;

	rrd.field1_off = LRH_BTH_MATCH_OFFSET;

	rrd.field2_off = LRH_SC_MATCH_OFFSET;

	rrd.index1_off = LRH_SC_SELECT_OFFSET;

	rrd.index1_width = n;

	rrd.index2_off = QPN_SELECT_OFFSET;

	rrd.index2_width = m + n;

	rrd.mask1 = LRH_BTH_MASK;

	rrd.value1 = LRH_BTH_VALUE;

	rrd.mask2 = LRH_SC_MASK;

	rrd.value2 = LRH_SC_VALUE;



	/* add rule 0 */

	write_csr(dd, RCV_RSM_CFG /* + (8 * 0) */,

		  (u64)rmt->used << RCV_RSM_CFG_OFFSET_SHIFT |

		  RCV_RSM_CFG_ENABLE_OR_CHAIN_RSM0_MASK <<

			RCV_RSM_CFG_ENABLE_OR_CHAIN_RSM0_SHIFT |

		  2ull << RCV_RSM_CFG_PACKET_TYPE_SHIFT);

	write_csr(dd, RCV_RSM_SELECT /* + (8 * 0) */,

		  LRH_BTH_MATCH_OFFSET << RCV_RSM_SELECT_FIELD1_OFFSET_SHIFT |

		  LRH_SC_MATCH_OFFSET << RCV_RSM_SELECT_FIELD2_OFFSET_SHIFT |

		  LRH_SC_SELECT_OFFSET << RCV_RSM_SELECT_INDEX1_OFFSET_SHIFT |

		  ((u64)n) << RCV_RSM_SELECT_INDEX1_WIDTH_SHIFT |

		  QPN_SELECT_OFFSET << RCV_RSM_SELECT_INDEX2_OFFSET_SHIFT |

		  ((u64)m + (u64)n) << RCV_RSM_SELECT_INDEX2_WIDTH_SHIFT);

	write_csr(dd, RCV_RSM_MATCH /* + (8 * 0) */,

		  LRH_BTH_MASK << RCV_RSM_MATCH_MASK1_SHIFT |

		  LRH_BTH_VALUE << RCV_RSM_MATCH_VALUE1_SHIFT |

		  LRH_SC_MASK << RCV_RSM_MATCH_MASK2_SHIFT |

		  LRH_SC_VALUE << RCV_RSM_MATCH_VALUE2_SHIFT);

	add_rsm_rule(dd, 0, &rrd);



	/* mark RSM map entries as used */

	rmt->used += rmt_entries;

	/* map everything else to the mcast/err/vl15 context */