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x86/amd-iommu: Move inv-dte command building to own function

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This patch moves command building for the invalidate-dte
command into its own function.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2011-04-06 11:07:21 +02:00
parent ded467374a
commit 94fe79e2f1
1 changed files with 8 additions and 4 deletions
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12
arch/x86/kernel/amd_iommu.c
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@ -390,6 +390,13 @@ static void build_completion_wait(struct iommu_cmd *cmd)
CMD_SET_TYPE(cmd, CMD_COMPL_WAIT); CMD_SET_TYPE(cmd, CMD_COMPL_WAIT);
} }
static void build_inv_dte(struct iommu_cmd *cmd, u16 devid)
{
memset(cmd, 0, sizeof(*cmd));
cmd->data[0] = devid;
CMD_SET_TYPE(cmd, CMD_INV_DEV_ENTRY);
}
/* /*
* Writes the command to the IOMMUs command buffer and informs the * Writes the command to the IOMMUs command buffer and informs the
* hardware about the new command. Must be called with iommu->lock held. * hardware about the new command. Must be called with iommu->lock held.
@ -533,10 +540,7 @@ static int iommu_flush_device(struct device *dev)
devid = get_device_id(dev); devid = get_device_id(dev);
iommu = amd_iommu_rlookup_table[devid]; iommu = amd_iommu_rlookup_table[devid];
/* Build command */ build_inv_dte(&cmd, devid);
memset(&cmd, 0, sizeof(cmd));
CMD_SET_TYPE(&cmd, CMD_INV_DEV_ENTRY);
cmd.data[0] = devid;
return iommu_queue_command(iommu, &cmd); return iommu_queue_command(iommu, &cmd);
} }