diff options
Diffstat (limited to 'drivers/infiniband/hw/mthca/mthca_av.c')
-rw-r--r-- | drivers/infiniband/hw/mthca/mthca_av.c | 100 |
1 files changed, 99 insertions, 1 deletions
diff --git a/drivers/infiniband/hw/mthca/mthca_av.c b/drivers/infiniband/hw/mthca/mthca_av.c index bc5bdcbe51b5..b12aa03be251 100644 --- a/drivers/infiniband/hw/mthca/mthca_av.c +++ b/drivers/infiniband/hw/mthca/mthca_av.c | |||
@@ -42,6 +42,20 @@ | |||
42 | 42 | ||
43 | #include "mthca_dev.h" | 43 | #include "mthca_dev.h" |
44 | 44 | ||
45 | enum { | ||
46 | MTHCA_RATE_TAVOR_FULL = 0, | ||
47 | MTHCA_RATE_TAVOR_1X = 1, | ||
48 | MTHCA_RATE_TAVOR_4X = 2, | ||
49 | MTHCA_RATE_TAVOR_1X_DDR = 3 | ||
50 | }; | ||
51 | |||
52 | enum { | ||
53 | MTHCA_RATE_MEMFREE_FULL = 0, | ||
54 | MTHCA_RATE_MEMFREE_QUARTER = 1, | ||
55 | MTHCA_RATE_MEMFREE_EIGHTH = 2, | ||
56 | MTHCA_RATE_MEMFREE_HALF = 3 | ||
57 | }; | ||
58 | |||
45 | struct mthca_av { | 59 | struct mthca_av { |
46 | __be32 port_pd; | 60 | __be32 port_pd; |
47 | u8 reserved1; | 61 | u8 reserved1; |
@@ -55,6 +69,90 @@ struct mthca_av { | |||
55 | __be32 dgid[4]; | 69 | __be32 dgid[4]; |
56 | }; | 70 | }; |
57 | 71 | ||
72 | static enum ib_rate memfree_rate_to_ib(u8 mthca_rate, u8 port_rate) | ||
73 | { | ||
74 | switch (mthca_rate) { | ||
75 | case MTHCA_RATE_MEMFREE_EIGHTH: | ||
76 | return mult_to_ib_rate(port_rate >> 3); | ||
77 | case MTHCA_RATE_MEMFREE_QUARTER: | ||
78 | return mult_to_ib_rate(port_rate >> 2); | ||
79 | case MTHCA_RATE_MEMFREE_HALF: | ||
80 | return mult_to_ib_rate(port_rate >> 1); | ||
81 | case MTHCA_RATE_MEMFREE_FULL: | ||
82 | default: | ||
83 | return mult_to_ib_rate(port_rate); | ||
84 | } | ||
85 | } | ||
86 | |||
87 | static enum ib_rate tavor_rate_to_ib(u8 mthca_rate, u8 port_rate) | ||
88 | { | ||
89 | switch (mthca_rate) { | ||
90 | case MTHCA_RATE_TAVOR_1X: return IB_RATE_2_5_GBPS; | ||
91 | case MTHCA_RATE_TAVOR_1X_DDR: return IB_RATE_5_GBPS; | ||
92 | case MTHCA_RATE_TAVOR_4X: return IB_RATE_10_GBPS; | ||
93 | default: return port_rate; | ||
94 | } | ||
95 | } | ||
96 | |||
97 | enum ib_rate mthca_rate_to_ib(struct mthca_dev *dev, u8 mthca_rate, u8 port) | ||
98 | { | ||
99 | if (mthca_is_memfree(dev)) { | ||
100 | /* Handle old Arbel FW */ | ||
101 | if (dev->limits.stat_rate_support == 0x3 && mthca_rate) | ||
102 | return IB_RATE_2_5_GBPS; | ||
103 | |||
104 | return memfree_rate_to_ib(mthca_rate, dev->rate[port - 1]); | ||
105 | } else | ||
106 | return tavor_rate_to_ib(mthca_rate, dev->rate[port - 1]); | ||
107 | } | ||
108 | |||
109 | static u8 ib_rate_to_memfree(u8 req_rate, u8 cur_rate) | ||
110 | { | ||
111 | if (cur_rate <= req_rate) | ||
112 | return 0; | ||
113 | |||
114 | /* | ||
115 | * Inter-packet delay (IPD) to get from rate X down to a rate | ||
116 | * no more than Y is (X - 1) / Y. | ||
117 | */ | ||
118 | switch ((cur_rate - 1) / req_rate) { | ||
119 | case 0: return MTHCA_RATE_MEMFREE_FULL; | ||
120 | case 1: return MTHCA_RATE_MEMFREE_HALF; | ||
121 | case 2: /* fall through */ | ||
122 | case 3: return MTHCA_RATE_MEMFREE_QUARTER; | ||
123 | default: return MTHCA_RATE_MEMFREE_EIGHTH; | ||
124 | } | ||
125 | } | ||
126 | |||
127 | static u8 ib_rate_to_tavor(u8 static_rate) | ||
128 | { | ||
129 | switch (static_rate) { | ||
130 | case IB_RATE_2_5_GBPS: return MTHCA_RATE_TAVOR_1X; | ||
131 | case IB_RATE_5_GBPS: return MTHCA_RATE_TAVOR_1X_DDR; | ||
132 | case IB_RATE_10_GBPS: return MTHCA_RATE_TAVOR_4X; | ||
133 | default: return MTHCA_RATE_TAVOR_FULL; | ||
134 | } | ||
135 | } | ||
136 | |||
137 | u8 mthca_get_rate(struct mthca_dev *dev, int static_rate, u8 port) | ||
138 | { | ||
139 | u8 rate; | ||
140 | |||
141 | if (!static_rate || ib_rate_to_mult(static_rate) >= dev->rate[port - 1]) | ||
142 | return 0; | ||
143 | |||
144 | if (mthca_is_memfree(dev)) | ||
145 | rate = ib_rate_to_memfree(ib_rate_to_mult(static_rate), | ||
146 | dev->rate[port - 1]); | ||
147 | else | ||
148 | rate = ib_rate_to_tavor(static_rate); | ||
149 | |||
150 | if (!(dev->limits.stat_rate_support & (1 << rate))) | ||
151 | rate = 1; | ||
152 | |||
153 | return rate; | ||
154 | } | ||
155 | |||
58 | int mthca_create_ah(struct mthca_dev *dev, | 156 | int mthca_create_ah(struct mthca_dev *dev, |
59 | struct mthca_pd *pd, | 157 | struct mthca_pd *pd, |
60 | struct ib_ah_attr *ah_attr, | 158 | struct ib_ah_attr *ah_attr, |
@@ -107,7 +205,7 @@ on_hca_fail: | |||
107 | av->g_slid = ah_attr->src_path_bits; | 205 | av->g_slid = ah_attr->src_path_bits; |
108 | av->dlid = cpu_to_be16(ah_attr->dlid); | 206 | av->dlid = cpu_to_be16(ah_attr->dlid); |
109 | av->msg_sr = (3 << 4) | /* 2K message */ | 207 | av->msg_sr = (3 << 4) | /* 2K message */ |
110 | ah_attr->static_rate; | 208 | mthca_get_rate(dev, ah_attr->static_rate, ah_attr->port_num); |
111 | av->sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); | 209 | av->sl_tclass_flowlabel = cpu_to_be32(ah_attr->sl << 28); |
112 | if (ah_attr->ah_flags & IB_AH_GRH) { | 210 | if (ah_attr->ah_flags & IB_AH_GRH) { |
113 | av->g_slid |= 0x80; | 211 | av->g_slid |= 0x80; |