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ZealOS/docs/Kernel/BlkDev/DiskBlk.CC.html
TomAwezome a0f20b1dba Implement AHCIAtapiModeWriteSet.
2021-08-09 02:04:03 -04:00

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<a name="l1"></a><span class=cF0>#</span><span class=cF1>define</span><span class=cF0> ZERO_BUF_SIZE </span><span class=cFE>2048</span><span class=cF0>
<a name="l2"></a></span><span class=cF1>U0</span><span class=cF0> </span><span class=cF5>BlkWriteZero</span><span class=cF0>(</span><span class=cF9>CDrive</span><span class=cF0> *drive, </span><span class=cF9>I64</span><span class=cF0> blk, </span><span class=cF9>I64</span><span class=cF0> count)
<a name="l3"></a>{</span><span class=cF2>//Fill blk count with zeros in Drive.</span><span class=cF0>
<a name="l4"></a> </span><span class=cF9>I64</span><span class=cF0> n;
<a name="l5"></a> </span><span class=cF1>U8</span><span class=cF0> *z = </span><span class=cF5>CAlloc</span><span class=cF0>(ZERO_BUF_SIZE &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l6"></a> </span><span class=cF1>Bool</span><span class=cF0> show_progress;
<a name="l7"></a>
<a name="l8"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; ZERO_BUF_SIZE &amp;&amp; drive-&gt;bd-&gt;type != </span><span class=cF3>BDT_RAM</span><span class=cF0>)
<a name="l9"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l10"></a> </span><span class=cFB>progress1</span><span class=cF0> = </span><span class=cFE>0</span><span class=cF0>;
<a name="l11"></a> </span><span class=cFB>progress1_max</span><span class=cF0> = count;
<a name="l12"></a> </span><span class=cF5>StrCopy</span><span class=cF0>(</span><span class=cFB>progress1_desc</span><span class=cF0>, </span><span class=cF6>&quot;Zeroing&quot;</span><span class=cF0>);
<a name="l13"></a> show_progress = </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l14"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l15"></a> </span><span class=cF1>else</span><span class=cF0>
<a name="l16"></a> show_progress = </span><span class=cF3>FALSE</span><span class=cF0>;
<a name="l17"></a> </span><span class=cF1>while</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l18"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l19"></a> n = count;
<a name="l20"></a> </span><span class=cF1>if</span><span class=cF0> (n &gt; ZERO_BUF_SIZE)
<a name="l21"></a> n = ZERO_BUF_SIZE;
<a name="l22"></a> </span><span class=cF5>BlkWrite</span><span class=cF0>(drive, z, blk, n);
<a name="l23"></a> blk += n;
<a name="l24"></a> count -= n;
<a name="l25"></a> </span><span class=cF1>if</span><span class=cF0> (show_progress)
<a name="l26"></a> </span><span class=cFB>progress1</span><span class=cF0> += n;
<a name="l27"></a> </span><span class=cF5>Yield</span><span class=cF0>; </span><span class=cF2>//Prevent locking</span><span class=cF0>
<a name="l28"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l29"></a> </span><span class=cF5>Free</span><span class=cF0>(z);
<a name="l30"></a> </span><span class=cF1>if</span><span class=cF0> (show_progress)
<a name="l31"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l32"></a> *</span><span class=cFB>progress1_desc</span><span class=cF0> = </span><span class=cFE>0</span><span class=cF0>;
<a name="l33"></a> </span><span class=cFB>progress1</span><span class=cF0> = </span><span class=cFB>progress1_max</span><span class=cF0> = </span><span class=cFE>0</span><span class=cF0>;
<a name="l34"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l35"></a>}
<a name="l36"></a>
<a name="l37"></a></span><span class=cF1>Bool</span><span class=cF0> </span><span class=cF5>BlkRead</span><span class=cF0>(</span><span class=cF9>CDrive</span><span class=cF0> *drive, </span><span class=cF1>U8</span><span class=cF0> *buf, </span><span class=cF9>I64</span><span class=cF0> blk, </span><span class=cF9>I64</span><span class=cF0> count)
<a name="l38"></a>{</span><span class=cF2>//Read blk count from Drive to buf.</span><span class=cF0>
<a name="l39"></a> </span><span class=cF1>Bool</span><span class=cF0> res = </span><span class=cF3>TRUE</span><span class=cF0>, unlock;
<a name="l40"></a> </span><span class=cF9>CBlkDev</span><span class=cF0> *bd = drive-&gt;bd;
<a name="l41"></a>
<a name="l42"></a> </span><span class=cF1>if</span><span class=cF0> (count &lt;= </span><span class=cFE>0</span><span class=cF0>)
<a name="l43"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l44"></a> </span><span class=cF5>DriveCheck</span><span class=cF0>(drive);
<a name="l45"></a> </span><span class=cF1>try</span><span class=cF0>
<a name="l46"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l47"></a> unlock = </span><span class=cF5>DriveLock</span><span class=cF0>(drive);
<a name="l48"></a> </span><span class=cFD>BlkDevInit</span><span class=cF0>(bd);
<a name="l49"></a> </span><span class=cF1>if</span><span class=cF0> (drive-&gt;drv_offset &amp;&amp; blk &lt; drive-&gt;drv_offset || blk + count &gt; drive-&gt;drv_offset + drive-&gt;size)
<a name="l50"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'Drive'</span><span class=cF0>);
<a name="l51"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;flags &amp; </span><span class=cF3>BDF_READ_CACHE</span><span class=cF0>)
<a name="l52"></a> </span><span class=cFD>RCache</span><span class=cF0>(drive, &amp;buf, &amp;blk, &amp;count);
<a name="l53"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l54"></a> {
<a name="l55"></a> </span><span class=cF1>switch</span><span class=cF0> (bd-&gt;type)
<a name="l56"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l57"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_RAM</span><span class=cF0>:
<a name="l58"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(buf, bd-&gt;RAM_disk + blk &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>, count &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l59"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l60"></a>
<a name="l61"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ISO_FILE_READ</span><span class=cF0>:
<a name="l62"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ISO_FILE_WRITE</span><span class=cF0>:
<a name="l63"></a> </span><span class=cF5>FBlkRead</span><span class=cF0>(bd-&gt;file_disk, buf, blk, count);
<a name="l64"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l65"></a>
<a name="l66"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ATA</span><span class=cF0>:
<a name="l67"></a> res = </span><span class=cFD>AHCIAtaRBlks</span><span class=cF0>(drive, buf, blk, count);
<a name="l68"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l69"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ATAPI</span><span class=cF0>:
<a name="l70"></a> res = </span><span class=cFD>AHCIAtapiRBlks</span><span class=cF0>(drive, buf, blk, count);
<a name="l71"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l72"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l73"></a> bd-&gt;last_time = </span><span class=cF5>tS</span><span class=cF0>;
<a name="l74"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;flags &amp; </span><span class=cF3>BDF_READ_CACHE</span><span class=cF0>)
<a name="l75"></a> </span><span class=cFD>DiskCacheAdd</span><span class=cF0>(drive, buf, blk, count);
<a name="l76"></a> }
<a name="l77"></a> </span><span class=cF1>if</span><span class=cF0> (unlock)
<a name="l78"></a> </span><span class=cF5>DriveUnlock</span><span class=cF0>(drive);
<a name="l79"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l80"></a> </span><span class=cF1>catch</span><span class=cF0>
<a name="l81"></a> </span><span class=cF1>if</span><span class=cF0> (unlock)
<a name="l82"></a> </span><span class=cF5>DriveUnlock</span><span class=cF0>(drive);
<a name="l83"></a>
<a name="l84"></a> </span><span class=cF1>return</span><span class=cF0> res;
<a name="l85"></a>}
<a name="l86"></a>
<a name="l87"></a></span><span class=cF1>Bool</span><span class=cF0> </span><span class=cF5>BlkWrite</span><span class=cF0>(</span><span class=cF9>CDrive</span><span class=cF0> *drive, </span><span class=cF1>U8</span><span class=cF0> *buf, </span><span class=cF9>I64</span><span class=cF0> blk, </span><span class=cF9>I64</span><span class=cF0> count)
<a name="l88"></a>{</span><span class=cF2>//Write blk count from buf to Drive.</span><span class=cF0>
<a name="l89"></a> </span><span class=cF1>Bool</span><span class=cF0> res = </span><span class=cF3>TRUE</span><span class=cF0>, unlock;
<a name="l90"></a> </span><span class=cF9>CBlkDev</span><span class=cF0> *bd = drive-&gt;bd;
<a name="l91"></a>
<a name="l92"></a> </span><span class=cF1>if</span><span class=cF0> (count &lt;= </span><span class=cFE>0</span><span class=cF0>)
<a name="l93"></a> </span><span class=cF1>return</span><span class=cF0> </span><span class=cF3>TRUE</span><span class=cF0>;
<a name="l94"></a> </span><span class=cF5>DriveCheck</span><span class=cF0>(drive);
<a name="l95"></a> </span><span class=cF1>try</span><span class=cF0>
<a name="l96"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l97"></a> unlock = </span><span class=cF5>DriveLock</span><span class=cF0>(drive);
<a name="l98"></a> </span><span class=cFD>BlkDevInit</span><span class=cF0>(bd);
<a name="l99"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;flags &amp; </span><span class=cF3>BDF_READ_ONLY</span><span class=cF0> &amp;&amp; !</span><span class=cF7>(</span><span class=cF0>bd-&gt;flags &amp; </span><span class=cF3>BDF_READ_ONLY_OVERRIDE</span><span class=cF7>)</span><span class=cF0>)
<a name="l100"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'BlkDev'</span><span class=cF0>);
<a name="l101"></a> </span><span class=cF1>if</span><span class=cF0> (drive-&gt;drv_offset &amp;&amp; blk&lt;drive-&gt;drv_offset || blk + count&gt;drive-&gt;drv_offset + drive-&gt;size)
<a name="l102"></a> </span><span class=cF5>throw</span><span class=cF0>(</span><span class=cF6>'Drive'</span><span class=cF0>);
<a name="l103"></a> </span><span class=cF1>if</span><span class=cF0> (count &gt; </span><span class=cFE>0</span><span class=cF0>)
<a name="l104"></a> {
<a name="l105"></a> </span><span class=cF1>switch</span><span class=cF0> (bd-&gt;type)
<a name="l106"></a> </span><span class=cF7>{</span><span class=cF0>
<a name="l107"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_RAM</span><span class=cF0>:
<a name="l108"></a> </span><span class=cF5>MemCopy</span><span class=cF0>(bd-&gt;RAM_disk + blk &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>, buf, count &lt;&lt; </span><span class=cF3>BLK_SIZE_BITS</span><span class=cF0>);
<a name="l109"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l110"></a>
<a name="l111"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ISO_FILE_READ</span><span class=cF0>:
<a name="l112"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ISO_FILE_WRITE</span><span class=cF0>:
<a name="l113"></a> </span><span class=cF5>FBlkWrite</span><span class=cF0>(bd-&gt;file_disk, buf, blk, count);
<a name="l114"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l115"></a>
<a name="l116"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ATA</span><span class=cF0>:
<a name="l117"></a> </span><span class=cF1>case</span><span class=cF0> </span><span class=cF3>BDT_ATAPI</span><span class=cF0>:
<a name="l118"></a> res = </span><span class=cFD>AHCIAtaWBlks</span><span class=cF0>(drive, buf, blk, count);
<a name="l119"></a> </span><span class=cF1>break</span><span class=cF0>;
<a name="l120"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l121"></a> bd-&gt;last_time = </span><span class=cF5>tS</span><span class=cF0>;
<a name="l122"></a> </span><span class=cF1>if</span><span class=cF0> (bd-&gt;flags &amp; </span><span class=cF3>BDF_READ_CACHE</span><span class=cF0>)
<a name="l123"></a> </span><span class=cFD>DiskCacheAdd</span><span class=cF0>(drive, buf, blk, count);
<a name="l124"></a> }
<a name="l125"></a> </span><span class=cF1>if</span><span class=cF0> (unlock)
<a name="l126"></a> </span><span class=cF5>DriveUnlock</span><span class=cF0>(drive);
<a name="l127"></a> </span><span class=cF7>}</span><span class=cF0>
<a name="l128"></a> </span><span class=cF1>catch</span><span class=cF0>
<a name="l129"></a> </span><span class=cF1>if</span><span class=cF0> (unlock)
<a name="l130"></a> </span><span class=cF5>DriveUnlock</span><span class=cF0>(drive);
<a name="l131"></a>
<a name="l132"></a> </span><span class=cF1>return</span><span class=cF0> res;
<a name="l133"></a>}
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