summaryrefslogtreecommitdiff
path: root/drivers/iommu
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu_init.c224
-rw-r--r--drivers/iommu/amd_iommu_types.h5
2 files changed, 121 insertions, 108 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index de7a6ce..c3d650d 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -715,90 +715,6 @@ static void __init set_device_exclusion_range(u16 devid, struct ivmd_header *m)
}
/*
- * This function reads some important data from the IOMMU PCI space and
- * initializes the driver data structure with it. It reads the hardware
- * capabilities and the first/last device entries
- */
-static void __init init_iommu_from_pci(struct amd_iommu *iommu)
-{
- int cap_ptr = iommu->cap_ptr;
- u32 range, misc, low, high;
- int i, j;
-
- pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET,
- &iommu->cap);
- pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET,
- &range);
- pci_read_config_dword(iommu->dev, cap_ptr + MMIO_MISC_OFFSET,
- &misc);
-
- iommu->first_device = calc_devid(MMIO_GET_BUS(range),
- MMIO_GET_FD(range));
- iommu->last_device = calc_devid(MMIO_GET_BUS(range),
- MMIO_GET_LD(range));
- iommu->evt_msi_num = MMIO_MSI_NUM(misc);
-
- if (!(iommu->cap & (1 << IOMMU_CAP_IOTLB)))
- amd_iommu_iotlb_sup = false;
-
- /* read extended feature bits */
- low = readl(iommu->mmio_base + MMIO_EXT_FEATURES);
- high = readl(iommu->mmio_base + MMIO_EXT_FEATURES + 4);
-
- iommu->features = ((u64)high << 32) | low;
-
- if (iommu_feature(iommu, FEATURE_GT)) {
- int glxval;
- u32 pasids;
- u64 shift;
-
- shift = iommu->features & FEATURE_PASID_MASK;
- shift >>= FEATURE_PASID_SHIFT;
- pasids = (1 << shift);
-
- amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids);
-
- glxval = iommu->features & FEATURE_GLXVAL_MASK;
- glxval >>= FEATURE_GLXVAL_SHIFT;
-
- if (amd_iommu_max_glx_val == -1)
- amd_iommu_max_glx_val = glxval;
- else
- amd_iommu_max_glx_val = min(amd_iommu_max_glx_val, glxval);
- }
-
- if (iommu_feature(iommu, FEATURE_GT) &&
- iommu_feature(iommu, FEATURE_PPR)) {
- iommu->is_iommu_v2 = true;
- amd_iommu_v2_present = true;
- }
-
- if (!is_rd890_iommu(iommu->dev))
- return;
-
- /*
- * Some rd890 systems may not be fully reconfigured by the BIOS, so
- * it's necessary for us to store this information so it can be
- * reprogrammed on resume
- */
-
- pci_read_config_dword(iommu->dev, iommu->cap_ptr + 4,
- &iommu->stored_addr_lo);
- pci_read_config_dword(iommu->dev, iommu->cap_ptr + 8,
- &iommu->stored_addr_hi);
-
- /* Low bit locks writes to configuration space */
- iommu->stored_addr_lo &= ~1;
-
- for (i = 0; i < 6; i++)
- for (j = 0; j < 0x12; j++)
- iommu->stored_l1[i][j] = iommu_read_l1(iommu, i, j);
-
- for (i = 0; i < 0x83; i++)
- iommu->stored_l2[i] = iommu_read_l2(iommu, i);
-}
-
-/*
* Takes a pointer to an AMD IOMMU entry in the ACPI table and
* initializes the hardware and our data structures with it.
*/
@@ -1014,13 +930,7 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
/*
* Copy data from ACPI table entry to the iommu struct
*/
- iommu->dev = pci_get_bus_and_slot(PCI_BUS(h->devid), h->devid & 0xff);
- if (!iommu->dev)
- return 1;
-
- iommu->root_pdev = pci_get_bus_and_slot(iommu->dev->bus->number,
- PCI_DEVFN(0, 0));
-
+ iommu->devid = h->devid;
iommu->cap_ptr = h->cap_ptr;
iommu->pci_seg = h->pci_seg;
iommu->mmio_phys = h->mmio_phys;
@@ -1038,20 +948,10 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
iommu->int_enabled = false;
- init_iommu_from_pci(iommu);
init_iommu_from_acpi(iommu, h);
init_iommu_devices(iommu);
- if (iommu_feature(iommu, FEATURE_PPR)) {
- iommu->ppr_log = alloc_ppr_log(iommu);
- if (!iommu->ppr_log)
- return -ENOMEM;
- }
-
- if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE))
- amd_iommu_np_cache = true;
-
- return pci_enable_device(iommu->dev);
+ return 0;
}
/*
@@ -1100,6 +1000,121 @@ static int __init init_iommu_all(struct acpi_table_header *table)
return 0;
}
+static int iommu_init_pci(struct amd_iommu *iommu)
+{
+ int cap_ptr = iommu->cap_ptr;
+ u32 range, misc, low, high;
+
+ iommu->dev = pci_get_bus_and_slot(PCI_BUS(iommu->devid),
+ iommu->devid & 0xff);
+ if (!iommu->dev)
+ return -ENODEV;
+
+ pci_read_config_dword(iommu->dev, cap_ptr + MMIO_CAP_HDR_OFFSET,
+ &iommu->cap);
+ pci_read_config_dword(iommu->dev, cap_ptr + MMIO_RANGE_OFFSET,
+ &range);
+ pci_read_config_dword(iommu->dev, cap_ptr + MMIO_MISC_OFFSET,
+ &misc);
+
+ iommu->first_device = calc_devid(MMIO_GET_BUS(range),
+ MMIO_GET_FD(range));
+ iommu->last_device = calc_devid(MMIO_GET_BUS(range),
+ MMIO_GET_LD(range));
+
+ if (!(iommu->cap & (1 << IOMMU_CAP_IOTLB)))
+ amd_iommu_iotlb_sup = false;
+
+ /* read extended feature bits */
+ low = readl(iommu->mmio_base + MMIO_EXT_FEATURES);
+ high = readl(iommu->mmio_base + MMIO_EXT_FEATURES + 4);
+
+ iommu->features = ((u64)high << 32) | low;
+
+ if (iommu_feature(iommu, FEATURE_GT)) {
+ int glxval;
+ u32 pasids;
+ u64 shift;
+
+ shift = iommu->features & FEATURE_PASID_MASK;
+ shift >>= FEATURE_PASID_SHIFT;
+ pasids = (1 << shift);
+
+ amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids);
+
+ glxval = iommu->features & FEATURE_GLXVAL_MASK;
+ glxval >>= FEATURE_GLXVAL_SHIFT;
+
+ if (amd_iommu_max_glx_val == -1)
+ amd_iommu_max_glx_val = glxval;
+ else
+ amd_iommu_max_glx_val = min(amd_iommu_max_glx_val, glxval);
+ }
+
+ if (iommu_feature(iommu, FEATURE_GT) &&
+ iommu_feature(iommu, FEATURE_PPR)) {
+ iommu->is_iommu_v2 = true;
+ amd_iommu_v2_present = true;
+ }
+
+ if (iommu_feature(iommu, FEATURE_PPR)) {
+ iommu->ppr_log = alloc_ppr_log(iommu);
+ if (!iommu->ppr_log)
+ return -ENOMEM;
+ }
+
+ if (iommu->cap & (1UL << IOMMU_CAP_NPCACHE))
+ amd_iommu_np_cache = true;
+
+ if (is_rd890_iommu(iommu->dev)) {
+ int i, j;
+
+ iommu->root_pdev = pci_get_bus_and_slot(iommu->dev->bus->number,
+ PCI_DEVFN(0, 0));
+
+ /*
+ * Some rd890 systems may not be fully reconfigured by the
+ * BIOS, so it's necessary for us to store this information so
+ * it can be reprogrammed on resume
+ */
+ pci_read_config_dword(iommu->dev, iommu->cap_ptr + 4,
+ &iommu->stored_addr_lo);
+ pci_read_config_dword(iommu->dev, iommu->cap_ptr + 8,
+ &iommu->stored_addr_hi);
+
+ /* Low bit locks writes to configuration space */
+ iommu->stored_addr_lo &= ~1;
+
+ for (i = 0; i < 6; i++)
+ for (j = 0; j < 0x12; j++)
+ iommu->stored_l1[i][j] = iommu_read_l1(iommu, i, j);
+
+ for (i = 0; i < 0x83; i++)
+ iommu->stored_l2[i] = iommu_read_l2(iommu, i);
+ }
+
+ return pci_enable_device(iommu->dev);
+}
+
+static int amd_iommu_init_pci(void)
+{
+ struct amd_iommu *iommu;
+ int ret = 0;
+
+ for_each_iommu(iommu) {
+ ret = iommu_init_pci(iommu);
+ if (ret)
+ break;
+ }
+
+ /* Make sure ACS will be enabled */
+ pci_request_acs();
+
+ ret = amd_iommu_init_devices();
+
+ return ret;
+}
+
/****************************************************************************
*
* The following functions initialize the MSI interrupts for all IOMMUs
@@ -1563,7 +1578,7 @@ int __init amd_iommu_init_hardware(void)
if (ret)
goto free;
- ret = amd_iommu_init_devices();
+ ret = amd_iommu_init_pci();
if (ret)
goto free;
@@ -1696,9 +1711,6 @@ int __init amd_iommu_detect(void)
iommu_detected = 1;
x86_init.iommu.iommu_init = amd_iommu_init;
- /* Make sure ACS will be enabled */
- pci_request_acs();
-
return 0;
}
diff --git a/drivers/iommu/amd_iommu_types.h b/drivers/iommu/amd_iommu_types.h
index 848fc8e..d0dab86 100644
--- a/drivers/iommu/amd_iommu_types.h
+++ b/drivers/iommu/amd_iommu_types.h
@@ -501,6 +501,9 @@ struct amd_iommu {
/* IOMMUv2 */
bool is_iommu_v2;
+ /* PCI device id of the IOMMU device */
+ u16 devid;
+
/*
* Capability pointer. There could be more than one IOMMU per PCI
* device function if there are more than one AMD IOMMU capability
@@ -530,8 +533,6 @@ struct amd_iommu {
u32 evt_buf_size;
/* event buffer virtual address */
u8 *evt_buf;
- /* MSI number for event interrupt */
- u16 evt_msi_num;
/* Base of the PPR log, if present */
u8 *ppr_log;
generated by cgit v0.10.2 at 2024-07-26 20:02:28 (GMT)