This source file includes following definitions.
- scsi_dma_map
- scsi_dma_unmap
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6 #include <linux/blkdev.h>
7 #include <linux/device.h>
8 #include <linux/export.h>
9 #include <linux/kernel.h>
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11 #include <scsi/scsi.h>
12 #include <scsi/scsi_cmnd.h>
13 #include <scsi/scsi_device.h>
14 #include <scsi/scsi_host.h>
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23 int scsi_dma_map(struct scsi_cmnd *cmd)
24 {
25 int nseg = 0;
26
27 if (scsi_sg_count(cmd)) {
28 struct device *dev = cmd->device->host->dma_dev;
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30 nseg = dma_map_sg(dev, scsi_sglist(cmd), scsi_sg_count(cmd),
31 cmd->sc_data_direction);
32 if (unlikely(!nseg))
33 return -ENOMEM;
34 }
35 return nseg;
36 }
37 EXPORT_SYMBOL(scsi_dma_map);
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43 void scsi_dma_unmap(struct scsi_cmnd *cmd)
44 {
45 if (scsi_sg_count(cmd)) {
46 struct device *dev = cmd->device->host->dma_dev;
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48 dma_unmap_sg(dev, scsi_sglist(cmd), scsi_sg_count(cmd),
49 cmd->sc_data_direction);
50 }
51 }
52 EXPORT_SYMBOL(scsi_dma_unmap);