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AMD IOMMU: move invalidation command building to a separate function

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Impact: refactoring of iommu_queue_inv_iommu_pages

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2008-12-02 20:54:37 +01:00
parent 8d201968e1
commit 237b6f3329
1 changed files with 16 additions and 10 deletions
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26
arch/x86/kernel/amd_iommu.c
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@@ -286,6 +286,21 @@ static int iommu_queue_inv_dev_entry(struct amd_iommu *iommu, u16 devid)
return ret; return ret;
} }
static void __iommu_build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address,
u16 domid, int pde, int s)
{
memset(cmd, 0, sizeof(*cmd));
address &= PAGE_MASK;
CMD_SET_TYPE(cmd, CMD_INV_IOMMU_PAGES);
cmd->data[1] |= domid;
cmd->data[2] = lower_32_bits(address);
cmd->data[3] = upper_32_bits(address);
if (s) /* size bit - we flush more than one 4kb page */
cmd->data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK;
if (pde) /* PDE bit - we wan't flush everything not only the PTEs */
cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK;
}
/* /*
* Generic command send function for invalidaing TLB entries * Generic command send function for invalidaing TLB entries
*/ */
@@ -295,16 +310,7 @@ static int iommu_queue_inv_iommu_pages(struct amd_iommu *iommu,
struct iommu_cmd cmd; struct iommu_cmd cmd;
int ret; int ret;
memset(&cmd, 0, sizeof(cmd)); __iommu_build_inv_iommu_pages(&cmd, address, domid, pde, s);
address &= PAGE_MASK;
CMD_SET_TYPE(&cmd, CMD_INV_IOMMU_PAGES);
cmd.data[1] |= domid;
cmd.data[2] = lower_32_bits(address);
cmd.data[3] = upper_32_bits(address);
if (s) /* size bit - we flush more than one 4kb page */
cmd.data[2] |= CMD_INV_IOMMU_PAGES_SIZE_MASK;
if (pde) /* PDE bit - we wan't flush everything not only the PTEs */
cmd.data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK;
ret = iommu_queue_command(iommu, &cmd); ret = iommu_queue_command(iommu, &cmd);