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1 | /** @file\r | |
2 | Implementation of reading the current interrupt status and recycled transmit\r | |
3 | buffer status from a network interface.\r | |
4 | \r | |
5 | Copyright (c) 2004 - 2016, Intel Corporation. All rights reserved.<BR>\r | |
6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r | |
7 | \r | |
8 | **/\r | |
9 | \r | |
10 | #include "Snp.h"\r | |
11 | \r | |
12 | /**\r | |
13 | Call undi to get the status of the interrupts, get the list of recycled transmit\r | |
14 | buffers that completed transmitting. The recycled transmit buffer address will\r | |
15 | be saved into Snp->RecycledTxBuf. This function will also update the MediaPresent\r | |
16 | field of EFI_SIMPLE_NETWORK_MODE if UNDI support it.\r | |
17 | \r | |
18 | @param[in] Snp Pointer to snp driver structure.\r | |
19 | @param[out] InterruptStatusPtr A non null pointer to contain the interrupt\r | |
20 | status.\r | |
21 | @param[in] GetTransmittedBuf Set to TRUE to retrieve the recycled transmit\r | |
22 | buffer address.\r | |
23 | \r | |
24 | @retval EFI_SUCCESS The status of the network interface was retrieved.\r | |
25 | @retval EFI_DEVICE_ERROR The command could not be sent to the network\r | |
26 | interface.\r | |
27 | \r | |
28 | **/\r | |
29 | EFI_STATUS\r | |
30 | PxeGetStatus (\r | |
31 | IN SNP_DRIVER *Snp,\r | |
32 | OUT UINT32 *InterruptStatusPtr,\r | |
33 | IN BOOLEAN GetTransmittedBuf\r | |
34 | )\r | |
35 | {\r | |
36 | PXE_DB_GET_STATUS *Db;\r | |
37 | UINT16 InterruptFlags;\r | |
38 | UINT32 Index;\r | |
39 | UINT64 *Tmp;\r | |
40 | \r | |
41 | Tmp = NULL;\r | |
42 | Db = Snp->Db;\r | |
43 | Snp->Cdb.OpCode = PXE_OPCODE_GET_STATUS;\r | |
44 | \r | |
45 | Snp->Cdb.OpFlags = 0;\r | |
46 | \r | |
47 | if (GetTransmittedBuf) {\r | |
48 | Snp->Cdb.OpFlags |= PXE_OPFLAGS_GET_TRANSMITTED_BUFFERS;\r | |
49 | ZeroMem (Db->TxBuffer, sizeof (Db->TxBuffer));\r | |
50 | }\r | |
51 | \r | |
52 | if (InterruptStatusPtr != NULL) {\r | |
53 | Snp->Cdb.OpFlags |= PXE_OPFLAGS_GET_INTERRUPT_STATUS;\r | |
54 | }\r | |
55 | \r | |
56 | if (Snp->MediaStatusSupported) {\r | |
57 | Snp->Cdb.OpFlags |= PXE_OPFLAGS_GET_MEDIA_STATUS;\r | |
58 | }\r | |
59 | \r | |
60 | Snp->Cdb.CPBsize = PXE_CPBSIZE_NOT_USED;\r | |
61 | Snp->Cdb.CPBaddr = PXE_CPBADDR_NOT_USED;\r | |
62 | \r | |
63 | Snp->Cdb.DBsize = (UINT16) sizeof (PXE_DB_GET_STATUS);\r | |
64 | Snp->Cdb.DBaddr = (UINT64)(UINTN) Db;\r | |
65 | \r | |
66 | Snp->Cdb.StatCode = PXE_STATCODE_INITIALIZE;\r | |
67 | Snp->Cdb.StatFlags = PXE_STATFLAGS_INITIALIZE;\r | |
68 | Snp->Cdb.IFnum = Snp->IfNum;\r | |
69 | Snp->Cdb.Control = PXE_CONTROL_LAST_CDB_IN_LIST;\r | |
70 | \r | |
71 | //\r | |
72 | // Issue UNDI command and check result.\r | |
73 | //\r | |
74 | DEBUG ((EFI_D_NET, "\nSnp->undi.get_status() "));\r | |
75 | \r | |
76 | (*Snp->IssueUndi32Command) ((UINT64)(UINTN) &Snp->Cdb);\r | |
77 | \r | |
78 | if (Snp->Cdb.StatCode != PXE_STATCODE_SUCCESS) {\r | |
79 | DEBUG (\r | |
80 | (EFI_D_NET,\r | |
81 | "\nSnp->undi.get_status() %xh:%xh\n",\r | |
82 | Snp->Cdb.StatFlags,\r | |
83 | Snp->Cdb.StatCode)\r | |
84 | );\r | |
85 | \r | |
86 | return EFI_DEVICE_ERROR;\r | |
87 | }\r | |
88 | //\r | |
89 | // report the values back..\r | |
90 | //\r | |
91 | if (InterruptStatusPtr != NULL) {\r | |
92 | InterruptFlags = (UINT16) (Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_INTERRUPT_MASK);\r | |
93 | \r | |
94 | *InterruptStatusPtr = 0;\r | |
95 | \r | |
96 | if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_RECEIVE) == PXE_STATFLAGS_GET_STATUS_RECEIVE) {\r | |
97 | *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_RECEIVE_INTERRUPT;\r | |
98 | }\r | |
99 | \r | |
100 | if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_TRANSMIT) == PXE_STATFLAGS_GET_STATUS_TRANSMIT) {\r | |
101 | *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_TRANSMIT_INTERRUPT;\r | |
102 | }\r | |
103 | \r | |
104 | if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_COMMAND) == PXE_STATFLAGS_GET_STATUS_COMMAND) {\r | |
105 | *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;\r | |
106 | }\r | |
107 | \r | |
108 | if ((InterruptFlags & PXE_STATFLAGS_GET_STATUS_SOFTWARE) == PXE_STATFLAGS_GET_STATUS_SOFTWARE) {\r | |
109 | *InterruptStatusPtr |= EFI_SIMPLE_NETWORK_COMMAND_INTERRUPT;\r | |
110 | }\r | |
111 | \r | |
112 | }\r | |
113 | \r | |
114 | if (GetTransmittedBuf) {\r | |
115 | if ((Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_NO_TXBUFS_WRITTEN) == 0) {\r | |
116 | //\r | |
117 | // UNDI has written some transmitted buffer addresses into the DB. Store them into Snp->RecycledTxBuf.\r | |
118 | //\r | |
119 | for (Index = 0; Index < MAX_XMIT_BUFFERS; Index++) {\r | |
120 | if (Db->TxBuffer[Index] != 0) {\r | |
121 | if (Snp->RecycledTxBufCount == Snp->MaxRecycledTxBuf) {\r | |
122 | //\r | |
123 | // Snp->RecycledTxBuf is full, reallocate a new one.\r | |
124 | //\r | |
125 | if ((Snp->MaxRecycledTxBuf + SNP_TX_BUFFER_INCREASEMENT) >= SNP_MAX_TX_BUFFER_NUM) {\r | |
126 | return EFI_DEVICE_ERROR;\r | |
127 | }\r | |
128 | Tmp = AllocatePool (sizeof (UINT64) * (Snp->MaxRecycledTxBuf + SNP_TX_BUFFER_INCREASEMENT));\r | |
129 | if (Tmp == NULL) {\r | |
130 | return EFI_DEVICE_ERROR;\r | |
131 | }\r | |
132 | CopyMem (Tmp, Snp->RecycledTxBuf, sizeof (UINT64) * Snp->RecycledTxBufCount);\r | |
133 | FreePool (Snp->RecycledTxBuf);\r | |
134 | Snp->RecycledTxBuf = Tmp;\r | |
135 | Snp->MaxRecycledTxBuf += SNP_TX_BUFFER_INCREASEMENT;\r | |
136 | }\r | |
137 | Snp->RecycledTxBuf[Snp->RecycledTxBufCount] = Db->TxBuffer[Index];\r | |
138 | Snp->RecycledTxBufCount++;\r | |
139 | }\r | |
140 | }\r | |
141 | }\r | |
142 | }\r | |
143 | \r | |
144 | //\r | |
145 | // Update MediaPresent field of EFI_SIMPLE_NETWORK_MODE if the UNDI support\r | |
146 | // returning media status from GET_STATUS command\r | |
147 | //\r | |
148 | if (Snp->MediaStatusSupported) {\r | |
149 | Snp->Snp.Mode->MediaPresent =\r | |
150 | (BOOLEAN) (((Snp->Cdb.StatFlags & PXE_STATFLAGS_GET_STATUS_NO_MEDIA) != 0) ? FALSE : TRUE);\r | |
151 | }\r | |
152 | \r | |
153 | return EFI_SUCCESS;\r | |
154 | }\r | |
155 | \r | |
156 | /**\r | |
157 | Reads the current interrupt status and recycled transmit buffer status from a\r | |
158 | network interface.\r | |
159 | \r | |
160 | This function gets the current interrupt and recycled transmit buffer status\r | |
161 | from the network interface. The interrupt status is returned as a bit mask in\r | |
162 | InterruptStatus. If InterruptStatus is NULL, the interrupt status will not be\r | |
163 | read. If TxBuf is not NULL, a recycled transmit buffer address will be retrieved.\r | |
164 | If a recycled transmit buffer address is returned in TxBuf, then the buffer has\r | |
165 | been successfully transmitted, and the status for that buffer is cleared. If\r | |
166 | the status of the network interface is successfully collected, EFI_SUCCESS\r | |
167 | will be returned. If the driver has not been initialized, EFI_DEVICE_ERROR will\r | |
168 | be returned.\r | |
169 | \r | |
170 | @param This A pointer to the EFI_SIMPLE_NETWORK_PROTOCOL instance.\r | |
171 | @param InterruptStatus A pointer to the bit mask of the currently active\r | |
172 | interrupts (see "Related Definitions"). If this is NULL,\r | |
173 | the interrupt status will not be read from the device.\r | |
174 | If this is not NULL, the interrupt status will be read\r | |
175 | from the device. When the interrupt status is read, it\r | |
176 | will also be cleared. Clearing the transmit interrupt does\r | |
177 | not empty the recycled transmit buffer array.\r | |
178 | @param TxBuf Recycled transmit buffer address. The network interface\r | |
179 | will not transmit if its internal recycled transmit\r | |
180 | buffer array is full. Reading the transmit buffer does\r | |
181 | not clear the transmit interrupt. If this is NULL, then\r | |
182 | the transmit buffer status will not be read. If there\r | |
183 | are no transmit buffers to recycle and TxBuf is not NULL,\r | |
184 | TxBuf will be set to NULL.\r | |
185 | \r | |
186 | @retval EFI_SUCCESS The status of the network interface was retrieved.\r | |
187 | @retval EFI_NOT_STARTED The network interface has not been started.\r | |
188 | @retval EFI_INVALID_PARAMETER This parameter was NULL or did not point to a valid\r | |
189 | EFI_SIMPLE_NETWORK_PROTOCOL structure.\r | |
190 | @retval EFI_DEVICE_ERROR The command could not be sent to the network\r | |
191 | interface.\r | |
192 | \r | |
193 | **/\r | |
194 | EFI_STATUS\r | |
195 | EFIAPI\r | |
196 | SnpUndi32GetStatus (\r | |
197 | IN EFI_SIMPLE_NETWORK_PROTOCOL *This,\r | |
198 | OUT UINT32 *InterruptStatus, OPTIONAL\r | |
199 | OUT VOID **TxBuf OPTIONAL\r | |
200 | )\r | |
201 | {\r | |
202 | SNP_DRIVER *Snp;\r | |
203 | EFI_TPL OldTpl;\r | |
204 | EFI_STATUS Status;\r | |
205 | \r | |
206 | if (This == NULL) {\r | |
207 | return EFI_INVALID_PARAMETER;\r | |
208 | }\r | |
209 | \r | |
210 | if (InterruptStatus == NULL && TxBuf == NULL) {\r | |
211 | return EFI_INVALID_PARAMETER;\r | |
212 | }\r | |
213 | \r | |
214 | Snp = EFI_SIMPLE_NETWORK_DEV_FROM_THIS (This);\r | |
215 | \r | |
216 | OldTpl = gBS->RaiseTPL (TPL_CALLBACK);\r | |
217 | \r | |
218 | if (Snp == NULL) {\r | |
219 | return EFI_DEVICE_ERROR;\r | |
220 | }\r | |
221 | \r | |
222 | switch (Snp->Mode.State) {\r | |
223 | case EfiSimpleNetworkInitialized:\r | |
224 | break;\r | |
225 | \r | |
226 | case EfiSimpleNetworkStopped:\r | |
227 | Status = EFI_NOT_STARTED;\r | |
228 | goto ON_EXIT;\r | |
229 | \r | |
230 | default:\r | |
231 | Status = EFI_DEVICE_ERROR;\r | |
232 | goto ON_EXIT;\r | |
233 | }\r | |
234 | \r | |
235 | if (Snp->RecycledTxBufCount == 0 && TxBuf != NULL) {\r | |
236 | Status = PxeGetStatus (Snp, InterruptStatus, TRUE);\r | |
237 | } else {\r | |
238 | Status = PxeGetStatus (Snp, InterruptStatus, FALSE);\r | |
239 | }\r | |
240 | \r | |
241 | if (TxBuf != NULL) {\r | |
242 | //\r | |
243 | // Get a recycled buf from Snp->RecycledTxBuf\r | |
244 | //\r | |
245 | if (Snp->RecycledTxBufCount == 0) {\r | |
246 | *TxBuf = NULL;\r | |
247 | } else {\r | |
248 | Snp->RecycledTxBufCount--;\r | |
249 | *TxBuf = (VOID *) (UINTN) Snp->RecycledTxBuf[Snp->RecycledTxBufCount];\r | |
250 | }\r | |
251 | }\r | |
252 | \r | |
253 | ON_EXIT:\r | |
254 | gBS->RestoreTPL (OldTpl);\r | |
255 | \r | |
256 | return Status;\r | |
257 | }\r |