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annotate e1000_initialize_reception.patch @ 77:892b3bc7e43b

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Wip on the RX init in the e1000 sample
author Louis Opter <louis@lse.epitech.net>
date Sun, 04 Mar 2012 18:35:43 +0100
parents 51bea596df7f
children 501bf9cf65dc
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1 # HG changeset patch
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2 # Parent 40e5b7402e64e301b898fa4da1056a5348522fbb
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3 rathaxes: initialize reception on the e1000 sample:
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4
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5 - This is documented in details in the sections 14.4 and 3.2 of the
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6 Intel Gigabit Controller Software Developer manual;
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7 - "Address filtering" is set up, address filters just tell the hardware
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8 which packets they should accept (unicast/multicast/vlan/promisc), we
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9 simply configure the hardware to accept packet for its own mac
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10 address (receive address);
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11 - It involves setting up a ring of receive descriptors (their format is
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12 documented in section 3.2.3) and an internal data structure to keep
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13 track of the ring;
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14 - Each descriptor of the ring correspond to an skbuff (skbuff are
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15 allocated individually).
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16
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17 diff --git a/rathaxes/samples/e1000/e1000.blt b/rathaxes/samples/e1000/e1000.blt
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18 --- a/rathaxes/samples/e1000/e1000.blt
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19 +++ b/rathaxes/samples/e1000/e1000.blt
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20 @@ -21,9 +21,12 @@
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21 */
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22 typedef struct rtx_e1000_ctx
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23 {
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24 - int bars;
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25 - unsigned char /* __iomem */ *ioaddr;
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26 - int irq;
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27 + int bars;
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28 + unsigned char /* __iomem */ *ioaddr;
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29 + int irq;
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30 +
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31 + /* we can't use the Rathaxes type here (#8) */
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32 + struct rtx_e1000_rx_ring rx_ring;
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33 } *rtx_e1000_ctx_p;
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34 }
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35
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36 @@ -36,6 +39,78 @@
76
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37 }
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38 }
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39
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40 + template type e1000::RxDescriptor()
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41 + {
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42 + chunk LKM::includes()
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43 + {
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44 + typedef int ${e1000::RxDescriptor};
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45 +
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46 + #include <linux/types.h>
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47 + }
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48 +
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49 + chunk ::decl()
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50 + {
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51 + typedef struct rtx_e1000_rx_descriptor
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52 + {
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53 + /* actual types are in comments */
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54 + unsigned long int /* __le64 */ buff_addr;
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55 + unsigned short /* __le16 */ length;
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56 + unsigned short /* __le16 */ csum;
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57 + unsigned char status;
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58 + unsigned char errors;
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59 + unsigned short /* __le16 */ special;
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60 + } *rtx_e1000_rx_descriptor_p;
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61 + }
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62 +
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63 + chunk ::init()
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64 + {
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65 + }
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66 +
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67 + map
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68 + {
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69 + }
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70 + }
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71 +
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72 + template type e1000::RxRing()
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73 + {
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74 + chunk LKM::includes()
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75 + {
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76 + typedef int ${e1000::RxRing};
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77 + }
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78 +
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79 + chunk ::decl()
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80 + {
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81 + /*
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82 + * - size: total size of the ring in bytes.
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83 + * - base: address of the ring;
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84 + * - dma_base: (physical) address of the ring where the device
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85 + * can access it;
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86 + * - skbuffs: array of the skbuffs associated with
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87 + * each descriptor;
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88 + * - dma_skbuffs: (physical) address of each skbuff
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89 + * where the device can write the received
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90 + * packets;
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91 + */
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92 + struct rtx_e1000_rx_ring
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93 + {
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94 + unsigned int size;
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95 + rtx_e1000_rx_descriptor_p base;
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96 + void *dma_base;
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97 +
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98 + struct sk_buff *skbuffs[256 /* ${config.rx_ring_size} */];
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99 + void *dma_skbuffs[256 /* ${config.rx_ring_size} */];
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100 + };
76
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101 + }
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102 +
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103 + chunk ::init()
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104 + {
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105 + }
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106 +
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107 + map
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108 + {
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109 + }
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110 + }
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111 +
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112 template type e1000::Register()
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113 {
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114 chunk LKM::includes()
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115 @@ -64,6 +139,9 @@
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116 E1000_FCT = 0x00030, /* Flow Control Type */
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117 E1000_FCTTV = 0x00170, /* Flow Control Transmit Timer Value */
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118 E1000_CRCERRS = 0x04000, /* CRC Error Count (base address of the statistic register spaces) */
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119 + E1000_RAL = 0x05400, /* Receive Address Low */
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120 + E1000_RAH = 0x05404, /* Receive Address High */
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121 + E1000_MTA = 0x05200, /* Multicast Table Array */
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122 };
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123 }
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124
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125 @@ -132,7 +210,8 @@
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126 E1000_INTR_RXDMT0 = 0x00000010, /* rx desc min. threshold (0) */
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127 E1000_INTR_RXO = 0x00000040, /* rx overrun */
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128 E1000_INTR_RXT0 = 0x00000080, /* rx timer intr (ring 0) */
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129 - E1000_INTR_MDAC = 0x00000200 /* MDIO access complete */
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130 + E1000_INTR_MDAC = 0x00000200, /* MDIO access complete */
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131 + E1000_RAH_AV = (1 << 31), /* Set the MAC Address as Valid */
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132 };
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133 }
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134
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135 @@ -458,14 +537,23 @@
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136 chunk ::CALL
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137 {
892b3bc7e43b Wip on the RX init in the e1000 sample
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parents: 76
diff changeset
138 /*
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parents: 76
diff changeset
139 - * This is documented in the Intel Gigabit Ethernet Controller
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
140 - * Software Developper manual.
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
141 + * This part is documented in the Intel Gigabit Ethernet Controller
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
142 + * Software Developper manual. (You can find it in the doc/hardware
892b3bc7e43b Wip on the RX init in the e1000 sample
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parents: 76
diff changeset
143 + * directory).
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
144 *
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
145 * Since this part is actually completely device specific it should
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
146 * not be written here. (but in the front-end).
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
147 */
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
148
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
149 /*
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
150 + * shortcut hw_ctx... maybe we should directly take an
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
151 + * e1000::Context? (but we would need to make it point back to
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
152 + * the struct net_device)
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
153 + */
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
154 + ${e1000::Context} hw_ctx;
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
155 + hw_ctx = &${ctx}->hw_ctx;
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
156 +
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
157 + /*
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
158 * "General Configuration" (section 14.3):
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
159 *
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
160 * - CTRL.ASDE/CTRL.SLU: Let the PHY handle the speed detection &
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
161 @@ -478,22 +566,111 @@
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
162 * - Finally, initialize all the statistic registers from
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
163 * E1000_CRCERRS to E1000_TSCTFC.
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
164 */
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
165 - rtx_e1000_register_set32(&${ctx}->hw_ctx, E1000_CTRL,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
166 +
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
167 + rtx_e1000_register_set32(hw_ctx, E1000_CTRL,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
168 E1000_CMD_ASDE |
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
169 E1000_CMD_SLU);
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
170 - rtx_e1000_register_unset32(&${ctx}->hw_ctx, E1000_CTRL,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
171 + rtx_e1000_register_unset32(hw_ctx, E1000_CTRL,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
172 E1000_CMD_LRST |
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Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
173 E1000_CMD_FRCSPD |
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
174 E1000_CMD_PHY_RST |
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
175 E1000_CMD_ILOS |
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
176 E1000_CMD_VME);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
177 - rtx_e1000_register_write32(&${ctx}->hw_ctx, E1000_FCAH, 0);
892b3bc7e43b Wip on the RX init in the e1000 sample
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parents: 76
diff changeset
178 - rtx_e1000_register_write32(&${ctx}->hw_ctx, E1000_FCAL, 0);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
179 - rtx_e1000_register_write32(&${ctx}->hw_ctx, E1000_FCT, 0);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
180 - rtx_e1000_register_write32(&${ctx}->hw_ctx, E1000_FCTTV, 0);
76
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parents:
diff changeset
181 - int i = 0;
77
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
182 + rtx_e1000_register_write32(hw_ctx, E1000_FCAH, 0);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
183 + rtx_e1000_register_write32(hw_ctx, E1000_FCAL, 0);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
184 + rtx_e1000_register_write32(hw_ctx, E1000_FCT, 0);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
185 + rtx_e1000_register_write32(hw_ctx, E1000_FCTTV, 0);
76
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
186 + int i = 0; /* CNorm workaround, the init part of for isn't generated */
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
187 for (i = 0; i != 64; ++i)
77
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
188 - rtx_e1000_register_write32(&${ctx}->hw_ctx, E1000_CRCERRS + i * 4, 0);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
189 + rtx_e1000_register_write32(hw_ctx, E1000_CRCERRS + i * 4, 0);
76
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
190 +
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
191 + /*
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
192 + * Receive initialization
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
193 + *
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
194 + * - Program the receive address, in RAL/RAH;
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
195 + * - Initialize the Multicast Table Array;
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
196 + * - Program the interrupt mask register (done in
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
197 + * e1000::activate_device_interruption);
77
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
198 + * - Allocate the receive descriptor ring and map it to make it
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
199 + * accessible by the device.
76
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
200 + */
77
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
201 +
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
202 + /* (We should use uint{32,16}_t but CNorm doesn't know them yet) */
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
203 + rtx_e1000_register_write32(hw_ctx, E1000_RAL,
76
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
204 + *(unsigned int *)(${ctx}->net_dev->dev_addr));
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
205 + /*
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
206 + * The 16 upper bits of RAH also store the AS bits (which should be
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
207 + * 0) and the AV bit (should be 1 to set the address as valid).
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
208 + */
77
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
209 + rtx_e1000_register_write32(hw_ctx, E1000_RAH,
76
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
210 + *(unsigned short *)(&${ctx}->net_dev->dev_addr[4]));
77
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
211 + rtx_e1000_register_set32(hw_ctx, E1000_RAH, E1000_RAH_AV);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
212 +
76
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
213 + i = 0; /* CNorm workaround, the init part of for isn't generated */
51bea596df7f Start a patch for the Rx init
Louis Opter <louis@lse.epitech.net>
parents:
diff changeset
214 + for (i = 0; i != 128; ++i)
77
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
215 + rtx_e1000_register_write32(hw_ctx, E1000_MTA + i * 4, 0);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
216 +
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
217 + hw_ctx->rx_ring.size = ${config.rx_ring_size} * sizeof(*hw_ctx->rx_ring.base);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
218 + hw_ctx->rx_ring.size = ALIGN(hw_ctx->rx_ring.size, 4096);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
219 + hw_ctx->rx_ring.base = dma_alloc_coherent(&${ctx}->pci_dev->dev,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
220 + hw_ctx->rx_ring.size, &hw_ctx->rx_ring.dma_base, GFP_KERNEL);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
221 + if (!hw->ctx->rx_ring.base)
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
222 + {
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
223 + ${Log::info("cannot allocate the descriptors for the Rx ring")};
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
224 + goto err_rx_ring_alloc;
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
225 + }
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
226 +
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
227 + i = 0;
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
228 + for (i = 0; i != ${config.rx_ring_size}; ++i)
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
229 + {
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
230 + hw_ctx->rx_ring.skbuffs[i] = netdev_allock_skb(${ctx}->net_device,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
231 + ${config.rx_buffer_len});
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
232 + if (!hw_ctx->rx_ring.skbuffs[i])
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
233 + {
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
234 + ${Log::info("cannot allocate a skbuff for the Rx ring")};
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
235 + goto err_skbuffs_alloc;
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
236 + }
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
237 + hw_ctx->rx_ring.dma_skbuffs[i] = dma_map_single(&${ctx}->pci_dev->dev,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
238 + hw_ctx->rx_ring.skbuffs[i]->data,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
239 + ${config.rx_buffer_len},
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
240 + DMA_FROM_DEVICE);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
241 + if (dma_mapping_error(&${ctx}->pci_dev->dev,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
242 + hw_ctx->rx_ring.dma_skbuffs[i]))
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
243 + {
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
244 + ${Log::info("cannot dma-map a skbuff for the Rx ring")};
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
245 + goto err_skbuffs_map;
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
246 + }
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
247 + hw_ctx->rx_ring.base[i].buff_addr = cpu_to_le64(hw_ctx->rx_ring.dma_skbuffs[i]);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
248 + }
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
249 +
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
250 + /*
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
251 + * Always the same problem with error handling, we don't know where
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
252 + * we are at in the "parent context":
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
253 + */
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
254 +
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
255 + err_skbuffs_alloc:
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
256 + while (i--)
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
257 + {
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
258 + dma_unmap_single(&${ctx}->pci_dev->dev,
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
259 + hw_ctx->rx_ring.dma_skbuffs[i],
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
260 + ${config.rx_buffer_len},
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
261 + DMA_FROM_DEVICE);
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
parents: 76
diff changeset
262 + err_skbuffs_map:
892b3bc7e43b Wip on the RX init in the e1000 sample
Louis Opter <louis@lse.epitech.net>
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diff changeset
263 + dev_kfree_skb(hw_ctx->rx_ring.skbuffs[i]);
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264 + }
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265 +
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266 + dma_free_coherent(&${ctx}->pci_dev->dev, hw_ctx->rx_ring.size,
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267 + hw_ctx->rx_ring.base, hw_ctx->rx_ring.dma_base);
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268 + err_rx_ring_alloc:
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269 + return -ENOMEM;
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270 + }
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271 + }
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272 +
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273 + template sequence e1000::free_rx_tx(Ethernet::Device ctx)
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274 + {
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275 + chunk ::CALL
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276 + {
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277 +
76
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278 }
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279 }
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280
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281 diff --git a/rathaxes/samples/e1000/e1000.rti b/rathaxes/samples/e1000/e1000.rti
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282 --- a/rathaxes/samples/e1000/e1000.rti
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283 +++ b/rathaxes/samples/e1000/e1000.rti
77
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284 @@ -1,6 +1,9 @@
76
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285 interface e1000 : Socket, Ethernet, PCI, LKM
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286 {
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287 provided type e1000::Context;
77
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288 + provided type e1000::RxDescriptor;
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289 + provided type e1000::RxRing;
76
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290 +
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291 /*
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292 * These two types should actually be registers definitions in the frontend:
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293 */
77
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294 @@ -57,6 +60,11 @@
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295 provided chunk ::CALL;
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296 }
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297
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298 + provided sequence e1000::free_rx_tx(Ethernet::Device dev)
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299 + {
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300 + provided chunk ::CALL;
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301 + }
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302 +
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303 provided sequence e1000::handle_interrupt(Ethernet::Device)
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304 {
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305 provided chunk ::CALL;
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306 diff --git a/rathaxes/samples/e1000/ethernet.blt b/rathaxes/samples/e1000/ethernet.blt
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307 --- a/rathaxes/samples/e1000/ethernet.blt
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308 +++ b/rathaxes/samples/e1000/ethernet.blt
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309 @@ -102,7 +102,7 @@
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310 {
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311 static int rtx_ethernet_close(struct net_device *dev)
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312 {
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313 - struct rtx_ethernet_dev* rtx_ether_dev = netdev_priv(dev);
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314 + struct rtx_ethernet_dev* rtx_ether_dev = netdev_priv(dev);
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315 struct rtx_e1000_ctx* ctx = &rtx_ether_dev->hw_ctx;
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316
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317 ${pointcut ::IMPLEMENTATION(local.rtx_ether_dev)};
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318 diff --git a/rathaxes/samples/e1000/lkm.rtx b/rathaxes/samples/e1000/lkm.rtx
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319 --- a/rathaxes/samples/e1000/lkm.rtx
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320 +++ b/rathaxes/samples/e1000/lkm.rtx
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321 @@ -24,7 +24,17 @@
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322 Ethernet::close(Ethernet::Device dev)
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323 {
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324 Log::info("closing the device");
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325 +
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326 + /*
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327 + * Note: some calls to release resources must be done when IRQs are
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328 + * enabled (dma_free_coherent() for example). So we have to cleanup our
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329 + * stuff before free_interrupt_handler().
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330 + */
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331 + e1000::free_rx_tx(dev);
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332 + Log::info("free'ed up skbuffs");
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333 +
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334 e1000::free_interrupt_handler(dev);
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335 + Log::info("interrupt handler free'ed");
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336 }
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337
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338 Ethernet::interrupt_handler(Ethernet::Device dev)
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339 @@ -61,4 +71,11 @@
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340 PCI::set_master = true;
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341
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342 Ethernet::ifname = "rtx%d";
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343 +
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344 + e1000::rx_ring_size = 256; /* Number of incoming packets we can buffer */
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345 + /*
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346 + * The e1000 supports seven receive buffer sizes: 256, 512, 1024, 2048,
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347 + * 4096, 8192 and 16384 bytes:
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348 + */
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349 + e1000::rx_buffer_len = 2048;
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350 }