Interface
5.2.3.3 | Register - Device to Host |
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| The Register - Device to Host FIS has the following layout: |
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| 3 | 3 |
| 2 |
| 2 |
| 2 |
| 2 |
| 2 | 2 | 2 | 2 |
| 2 | 2 | 1 |
| 1 |
| 1 | 1 | 1 |
| 1 |
| 1 | 1 | 1 | 1 |
| 9 |
| 8 | 7 |
| 6 |
| 5 | 4 | 3 | 2 |
| 1 |
| 0 |
| 1 | 0 |
| 9 |
| 8 |
| 7 |
| 6 |
| 5 | 4 | 3 | 2 |
| 1 | 0 | 9 |
| 8 |
| 7 | 6 | 5 |
| 4 |
| 3 | 2 | 1 | 0 |
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0 |
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| Error |
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| Status |
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| R |
| I |
| R | Reserved (0) |
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| FIS Type (34h) |
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1 |
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| Device |
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| LBA High |
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| LBA Mid |
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| LBA Low |
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2 |
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| Reserved (0) |
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| LBA High (exp) |
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| LBA Mid (exp) |
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| LBA Low (exp) (0) |
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3 |
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| Reserved (0) |
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| Reserved (0) |
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| Sector Count (exp) |
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| Sector Count |
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4 |
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| Reserved (0) |
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| Reserved (0) |
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| Reserved (0) |
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| Reserved (0) |
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Figure 5.5 Register - Device to Host FIS layout
The Register - Device to Host FIS is used when information concerning the Shadow Register Block in the host adapter is updated. This FIS indicates that the device has completed a command operation. Furthermore, this is a mechanism for changing information concerning the Shadow Register Block of the host adapter.
I - If this bit is set, an interrupt request is issued to the host system.
5.2.3.4 DMA Active - Device to Host
The DMA Active - Device to Host FIS has the following layout:
| 3 | 3 |
| 2 | 2 | 2 | 2 |
| 2 | 2 | 2 | 2 |
| 2 | 2 | 1 | 1 |
| 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| 1 | 0 |
| 9 | 8 | 7 | 6 |
| 5 | 4 | 3 | 2 |
| 1 | 0 | 9 | 8 |
| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
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0 |
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| Reserved (0) |
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| Reserved (0) |
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| R | R | R | Reserved (0) |
| FIS Type (39h) |
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| Figure 5.6 DMA Active - Device to Host FIS layout |
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The host uses the DMA Active - Device to Host FIS layout. This FIS instructs the host to continue transferring DMA data from the host to the device.