amd-iommu: remove amd_iommu_size kernel parameter

This parameter is not longer necessary when aperture increases
dynamically.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt
index e87bdbfbcc75e236124a526d4456ddf3c6afc4e3..5b776c6e7964cec49a498958f408d6bf32378963 100644 (file)
--- a/Documentation/kernel-parameters.txt
+++ b/Documentation/kernel-parameters.txt
@@ -329,11 +329,6 @@ and is between 256 and 4096 characters. It is defined in the file
                                    flushed before they will be reused, which
                                    is a lot of faster
 
-       amd_iommu_size= [HW,X86-64]
-                       Define the size of the aperture for the AMD IOMMU
-                       driver. Possible values are:
-                       '32M', '64M' (default), '128M', '256M', '512M', '1G'
-
        amijoy.map=     [HW,JOY] Amiga joystick support
                        Map of devices attached to JOY0DAT and JOY1DAT
                        Format: <a>,<b>

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index d129d8feba073697883f98b673c7abe10f2ab0d1..31d56c36010ac59695b00d0729bd46904aac63a9 100644 (file)
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -939,17 +939,10 @@ static void dma_ops_domain_free(struct dma_ops_domain *dom)
  * It also intializes the page table and the address allocator data
  * structures required for the dma_ops interface
  */
-static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu,
-                                                  unsigned order)
+static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu)
 {
        struct dma_ops_domain *dma_dom;
 
-       /*
-        * Currently the DMA aperture must be between 32 MB and 1GB in size
-        */
-       if ((order < 25) || (order > 30))
-               return NULL;
-
        dma_dom = kzalloc(sizeof(struct dma_ops_domain), GFP_KERNEL);
        if (!dma_dom)
                return NULL;
@@ -1087,7 +1080,6 @@ static int device_change_notifier(struct notifier_block *nb,
        struct protection_domain *domain;
        struct dma_ops_domain *dma_domain;
        struct amd_iommu *iommu;
-       int order = amd_iommu_aperture_order;
        unsigned long flags;
 
        if (devid > amd_iommu_last_bdf)
@@ -1126,7 +1118,7 @@ static int device_change_notifier(struct notifier_block *nb,
                dma_domain = find_protection_domain(devid);
                if (dma_domain)
                        goto out;
-               dma_domain = dma_ops_domain_alloc(iommu, order);
+               dma_domain = dma_ops_domain_alloc(iommu);
                if (!dma_domain)
                        goto out;
                dma_domain->target_dev = devid;
@@ -1826,7 +1818,6 @@ static void prealloc_protection_domains(void)
        struct pci_dev *dev = NULL;
        struct dma_ops_domain *dma_dom;
        struct amd_iommu *iommu;
-       int order = amd_iommu_aperture_order;
        u16 devid;
 
        while ((dev = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, dev)) != NULL) {
@@ -1839,7 +1830,7 @@ static void prealloc_protection_domains(void)
                iommu = amd_iommu_rlookup_table[devid];
                if (!iommu)
                        continue;
-               dma_dom = dma_ops_domain_alloc(iommu, order);
+               dma_dom = dma_ops_domain_alloc(iommu);
                if (!dma_dom)
                        continue;
                init_unity_mappings_for_device(dma_dom, devid);
@@ -1865,7 +1856,6 @@ static struct dma_map_ops amd_iommu_dma_ops = {
 int __init amd_iommu_init_dma_ops(void)
 {
        struct amd_iommu *iommu;
-       int order = amd_iommu_aperture_order;
        int ret;
 
        /*
@@ -1874,7 +1864,7 @@ int __init amd_iommu_init_dma_ops(void)
         * protection domain will be assigned to the default one.
         */
        list_for_each_entry(iommu, &amd_iommu_list, list) {
-               iommu->default_dom = dma_ops_domain_alloc(iommu, order);
+               iommu->default_dom = dma_ops_domain_alloc(iommu);
                if (iommu->default_dom == NULL)
                        return -ENOMEM;
                iommu->default_dom->domain.flags |= PD_DEFAULT_MASK;

diff --git a/arch/x86/kernel/amd_iommu_init.c b/arch/x86/kernel/amd_iommu_init.c
index 8c0be0902dacb2cc4e766cbe851891bd889f08e7..762a4eefec93043dd5c1788b4b004420d1951090 100644 (file)
--- a/arch/x86/kernel/amd_iommu_init.c
+++ b/arch/x86/kernel/amd_iommu_init.c
@@ -121,7 +121,6 @@ u16 amd_iommu_last_bdf;                     /* largest PCI device id we have
                                           to handle */
 LIST_HEAD(amd_iommu_unity_map);                /* a list of required unity mappings
                                           we find in ACPI */
-unsigned amd_iommu_aperture_order = 26; /* size of aperture in power of 2 */
 bool amd_iommu_isolate = true;         /* if true, device isolation is
                                           enabled */
 bool amd_iommu_unmap_flush;            /* if true, flush on every unmap */
@@ -1137,9 +1136,6 @@ int __init amd_iommu_init(void)
 
        enable_iommus();
 
-       printk(KERN_INFO "AMD IOMMU: aperture size is %d MB\n",
-                       (1 << (amd_iommu_aperture_order-20)));
-
        printk(KERN_INFO "AMD IOMMU: device isolation ");
        if (amd_iommu_isolate)
                printk("enabled\n");
@@ -1225,15 +1221,4 @@ static int __init parse_amd_iommu_options(char *str)
        return 1;
 }
 
-static int __init parse_amd_iommu_size_options(char *str)
-{
-       unsigned order = PAGE_SHIFT + get_order(memparse(str, &str));
-
-       if ((order > 24) && (order < 31))
-               amd_iommu_aperture_order = order;
-
-       return 1;
-}
-
 __setup("amd_iommu=", parse_amd_iommu_options);
-__setup("amd_iommu_size=", parse_amd_iommu_size_options);