|
1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
2 // All rights reserved. |
|
3 // This component and the accompanying materials are made available |
|
4 // under the terms of the License "Eclipse Public License v1.0" |
|
5 // which accompanies this distribution, and is available |
|
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
7 // |
|
8 // Initial Contributors: |
|
9 // Nokia Corporation - initial contribution. |
|
10 // |
|
11 // Contributors: |
|
12 // |
|
13 // Description: |
|
14 // |
|
15 |
|
16 /** |
|
17 @file |
|
18 @internalTechnology |
|
19 */ |
|
20 |
|
21 #include <e32def.h> |
|
22 #include <e32def_private.h> |
|
23 #include <e32std.h> |
|
24 #include <e32std_private.h> |
|
25 #include <e32base.h> |
|
26 #include <e32base_private.h> |
|
27 #include "msctypes.h" |
|
28 |
|
29 #include "mblocktransferprotocol.h" |
|
30 #include "tblocktransfer.h" |
|
31 #include "debug.h" |
|
32 #include "msdebug.h" |
|
33 |
|
34 |
|
35 /** |
|
36 Manage a read from a block device. |
|
37 |
|
38 @param aProtocol A reference to object providing protocol read method |
|
39 @param aPosition The position to start reading from |
|
40 @param aLength The length of data to read |
|
41 @param aBuf Buffer to copy the data to |
|
42 */ |
|
43 void TBlockTransfer::ReadL(MBlockTransferProtocol& aProtocol, |
|
44 TPos aPosition, |
|
45 TInt aLength, |
|
46 TDes8& aBuf) |
|
47 { |
|
48 __MSFNLOG |
|
49 __HOSTPRINT1(_L("blocklen = 0%lx"), iBlockLength); |
|
50 |
|
51 TInt copylen = 0; |
|
52 TInt headlen = 0; |
|
53 |
|
54 aBuf.SetLength(0); |
|
55 TPos headOffset = GetHeadBlockOffset(aPosition); |
|
56 /**** READ10 HEAD ****/ |
|
57 if (headOffset) |
|
58 { |
|
59 TPos headpos = aPosition - headOffset; |
|
60 RBuf8 headbuf; |
|
61 CleanupClosePushL(headbuf); |
|
62 headbuf.Create(iBlockLength); |
|
63 |
|
64 headlen = ((headOffset + aLength - 1) / iBlockLength) == 0 ? aLength : (iBlockLength - headOffset); |
|
65 |
|
66 __HOSTPRINT2(_L("\tRead head pos = 0%lx length = 0%lx"), |
|
67 headpos, iBlockLength); |
|
68 aProtocol.BlockReadL(headpos, headbuf, iBlockLength); |
|
69 aBuf.Append(headbuf.Ptr() + headOffset, headlen); |
|
70 CleanupStack::PopAndDestroy(&headbuf); |
|
71 } |
|
72 |
|
73 /**** READ10 BODY ****/ |
|
74 TInt blocksInMain = (aLength - headlen)/iBlockLength; |
|
75 if (blocksInMain) |
|
76 { |
|
77 copylen = blocksInMain * iBlockLength; |
|
78 __HOSTPRINT2(_L("\tRead main pos = 0%lx length = 0x%x"), |
|
79 aPosition+headlen, copylen); |
|
80 aProtocol.BlockReadL(aPosition+headlen, (TDes8 &)aBuf, copylen); |
|
81 } |
|
82 |
|
83 copylen += headlen; |
|
84 |
|
85 /**** READ10 TAIL ****/ |
|
86 TInt tailLen = aLength - copylen; |
|
87 if ((tailLen) != 0) |
|
88 { |
|
89 RBuf8 tailbuf; |
|
90 CleanupClosePushL(tailbuf); |
|
91 tailbuf.Create(iBlockLength); |
|
92 |
|
93 __HOSTPRINT2(_L("\tRead tail pos = 0%lx length = 0%lx"), |
|
94 aPosition+copylen, iBlockLength); |
|
95 aProtocol.BlockReadL(aPosition+copylen, tailbuf, iBlockLength); |
|
96 aBuf.Append(tailbuf.Ptr(), tailLen); |
|
97 |
|
98 CleanupStack::PopAndDestroy(&tailbuf); |
|
99 } |
|
100 } |
|
101 |
|
102 |
|
103 /** |
|
104 Manage a write to a block device |
|
105 |
|
106 @param aProtocol A reference to object providing protocol read method |
|
107 @param aPosition The position to start reading from |
|
108 @param aLength The length of data to read |
|
109 @param aBuf Buffer containing the data to write |
|
110 */ |
|
111 void TBlockTransfer::WriteL(MBlockTransferProtocol& aProtocol, |
|
112 TPos aPosition, |
|
113 TInt aLength, |
|
114 TDesC8& aBuf) |
|
115 { |
|
116 __MSFNLOG |
|
117 TInt copylen = 0; |
|
118 TInt headlen = 0; |
|
119 |
|
120 TPos headOffset = GetHeadBlockOffset(aPosition); |
|
121 /**** WRITE10 HEAD ****/ |
|
122 if (headOffset) |
|
123 { |
|
124 TPos headpos = aPosition - headOffset; |
|
125 |
|
126 RBuf8 headbuf; |
|
127 CleanupClosePushL(headbuf); |
|
128 headbuf.Create(iBlockLength); |
|
129 |
|
130 RBuf8 buf; |
|
131 CleanupClosePushL(buf); |
|
132 buf.Create(iBlockLength); |
|
133 |
|
134 headlen = ((headOffset + aLength - 1) / iBlockLength) == 0 ? aLength : (iBlockLength - headOffset); |
|
135 |
|
136 __HOSTPRINT2(_L("\tWrite-Read head pos = 0%lx length = 0%lx"), |
|
137 headpos, iBlockLength); |
|
138 |
|
139 aProtocol.BlockReadL(headpos, headbuf, iBlockLength); |
|
140 /* get head */ |
|
141 __HOSTPRINT2(_L("\tcopying read data pos = 0%lx offset = 0%lx"), |
|
142 headpos, headOffset); |
|
143 buf.Append(headbuf.Ptr(), headOffset); |
|
144 |
|
145 /* get body */ |
|
146 buf.Append(aBuf.Ptr(), headlen); |
|
147 |
|
148 /* Is it a short write and tail exist? */ |
|
149 TInt headEndOffset = headOffset + headlen; |
|
150 if (headEndOffset != iBlockLength) |
|
151 { |
|
152 TInt len = iBlockLength - headEndOffset; |
|
153 |
|
154 __HOSTPRINT2(_L("\t(short write) copying read data pos = 0%lx length = %08x"), |
|
155 (headpos + headEndOffset), len); |
|
156 buf.Append(headbuf.Ptr() + headEndOffset, len); |
|
157 } |
|
158 |
|
159 __HOSTPRINT2(_L("\tWrite head pos = 0%lx length = %08x"), |
|
160 headpos, headlen); |
|
161 |
|
162 aProtocol.BlockWriteL(headpos, (TDes8 &)buf, 0, iBlockLength); |
|
163 |
|
164 CleanupStack::PopAndDestroy(&buf); |
|
165 CleanupStack::PopAndDestroy(&headbuf); |
|
166 } |
|
167 |
|
168 /**** WRITE10 BODY ****/ |
|
169 TPos blocksInMain = (aLength - headlen)/iBlockLength; |
|
170 if (blocksInMain) |
|
171 { |
|
172 copylen = blocksInMain * iBlockLength; |
|
173 |
|
174 const TUint64 pos = aPosition + headlen; |
|
175 __HOSTPRINT2(_L("\tWrite main pos = 0%lx length = %08x"), |
|
176 pos, copylen); |
|
177 |
|
178 /* form the body */ |
|
179 aProtocol.BlockWriteL(pos, (TDes8 &)aBuf, headlen, copylen); |
|
180 } |
|
181 |
|
182 copylen += headlen; |
|
183 |
|
184 /**** WRITE10 TAIL ****/ |
|
185 TInt tailLen = aLength - copylen;; |
|
186 if (tailLen != 0) |
|
187 { |
|
188 RBuf8 buf; |
|
189 CleanupClosePushL(buf); |
|
190 buf.Create(iBlockLength); |
|
191 |
|
192 RBuf8 tailbuf; |
|
193 CleanupClosePushL(tailbuf); |
|
194 tailbuf.Create(iBlockLength); |
|
195 |
|
196 const TUint64 pos = aPosition + copylen; |
|
197 |
|
198 __HOSTPRINT2(_L("\tWrite-Read tail pos = 0%lx length = %08x"), |
|
199 pos, iBlockLength); |
|
200 |
|
201 aProtocol.BlockReadL(pos, tailbuf, iBlockLength); |
|
202 /* get head */ |
|
203 buf.Append(aBuf.Ptr() + copylen, tailLen); |
|
204 /* get tail */ |
|
205 buf.Append(tailbuf.Ptr() + tailLen, iBlockLength - tailLen); |
|
206 |
|
207 aProtocol.BlockWriteL(pos, (TDes8 &)buf, 0, iBlockLength); |
|
208 |
|
209 CleanupStack::PopAndDestroy(&tailbuf); |
|
210 CleanupStack::PopAndDestroy(&buf); |
|
211 } |
|
212 } |
|
213 |
|
214 |
|
215 void TBlockTransfer::SetCapacity(TUint32 aBlockLength, TLba aLastLba) |
|
216 { |
|
217 __MSFNLOG |
|
218 iBlockLength = static_cast<TInt64>(aBlockLength); |
|
219 iLastLba = aLastLba; |
|
220 } |
|
221 |
|
222 |
|
223 TPos TBlockTransfer::GetHeadBlockOffset(TPos aPos) |
|
224 { |
|
225 __MSFNLOG |
|
226 return (aPos % iBlockLength); |
|
227 } |
|
228 |
|
229 TLba TBlockTransfer::GetHeadBlockLbaL(TPos aPos) |
|
230 { |
|
231 __MSFNLOG |
|
232 TLba lba = I64LOW(aPos / iBlockLength); |
|
233 if (lba > iLastLba) |
|
234 User::Leave(KErrArgument); |
|
235 return lba; |
|
236 } |
|
237 |
|
238 TPos TBlockTransfer::GetTailBlockOffset(TPos aPos, TInt aLen) |
|
239 { |
|
240 __MSFNLOG |
|
241 return ((aPos + aLen) % iBlockLength); |
|
242 } |
|
243 |
|
244 TLba TBlockTransfer::GetTailBlockLbaL(TPos aPos, TInt aLen) |
|
245 { |
|
246 __MSFNLOG |
|
247 TLba lba = I64LOW((aPos + aLen) / iBlockLength); |
|
248 if (lba > iLastLba) |
|
249 User::Leave(KErrArgument); |
|
250 return lba; |
|
251 } |
|
252 |
|
253 |
|
254 |