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IOMMU Updates for Linux v4.21

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Including (in no particular order):
 
 	- Page table code for AMD IOMMU now supports large pages where
 	  smaller page-sizes were mapped before. VFIO had to work around
 	  that in the past and I included a patch to remove it (acked by
 	  Alex Williamson)
 
 	- Patches to unmodularize a couple of IOMMU drivers that would
 	  never work as modules anyway.
 
 	- Work to unify the the iommu-related pointers in
 	  'struct device' into one pointer. This work is not finished
 	  yet, but will probably be in the next cycle.
 
 	- NUMA aware allocation in iommu-dma code
 
 	- Support for r8a774a1 and r8a774c0 in the Renesas IOMMU driver
 
 	- Scalable mode support for the Intel VT-d driver
 
 	- PM runtime improvements for the ARM-SMMU driver
 
 	- Support for the QCOM-SMMUv2 IOMMU hardware from Qualcom
 
 	- Various smaller fixes and improvements
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Merge tag 'iommu-updates-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU updates from Joerg Roedel:

 - Page table code for AMD IOMMU now supports large pages where smaller
   page-sizes were mapped before. VFIO had to work around that in the
   past and I included a patch to remove it (acked by Alex Williamson)

 - Patches to unmodularize a couple of IOMMU drivers that would never
   work as modules anyway.

 - Work to unify the the iommu-related pointers in 'struct device' into
   one pointer. This work is not finished yet, but will probably be in
   the next cycle.

 - NUMA aware allocation in iommu-dma code

 - Support for r8a774a1 and r8a774c0 in the Renesas IOMMU driver

 - Scalable mode support for the Intel VT-d driver

 - PM runtime improvements for the ARM-SMMU driver

 - Support for the QCOM-SMMUv2 IOMMU hardware from Qualcom

 - Various smaller fixes and improvements

* tag 'iommu-updates-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (78 commits)
  iommu: Check for iommu_ops == NULL in iommu_probe_device()
  ACPI/IORT: Don't call iommu_ops->add_device directly
  iommu/of: Don't call iommu_ops->add_device directly
  iommu: Consolitate ->add/remove_device() calls
  iommu/sysfs: Rename iommu_release_device()
  dmaengine: sh: rcar-dmac: Use device_iommu_mapped()
  xhci: Use device_iommu_mapped()
  powerpc/iommu: Use device_iommu_mapped()
  ACPI/IORT: Use device_iommu_mapped()
  iommu/of: Use device_iommu_mapped()
  driver core: Introduce device_iommu_mapped() function
  iommu/tegra: Use helper functions to access dev->iommu_fwspec
  iommu/qcom: Use helper functions to access dev->iommu_fwspec
  iommu/of: Use helper functions to access dev->iommu_fwspec
  iommu/mediatek: Use helper functions to access dev->iommu_fwspec
  iommu/ipmmu-vmsa: Use helper functions to access dev->iommu_fwspec
  iommu/dma: Use helper functions to access dev->iommu_fwspec
  iommu/arm-smmu: Use helper functions to access dev->iommu_fwspec
  ACPI/IORT: Use helper functions to access dev->iommu_fwspec
  iommu: Introduce wrappers around dev->iommu_fwspec
  ...
This commit is contained in:
Linus Torvalds 2019-01-01 15:55:29 -08:00
commit 8e143b90e4
46 changed files with 1613 additions and 918 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
Documentation/admin-guide/kernel-parameters.txt
View File

@ -1690,12 +1690,12 @@
By default, super page will be supported if Intel IOMMU
has the capability. With this option, super page will
not be supported.
ecs_off [Default Off]
By default, extended context tables will be supported if
the hardware advertises that it has support both for the
extended tables themselves, and also PASID support. With
this option set, extended tables will not be used even
on hardware which claims to support them.
sm_off [Default Off]
By default, scalable mode will be supported if the
hardware advertises that it has support for the scalable
mode translation. With this option set, scalable mode
will not be used even on hardware which claims to support
it.
tboot_noforce [Default Off]
Do not force the Intel IOMMU enabled under tboot.
By default, tboot will force Intel IOMMU on, which

43
Documentation/devicetree/bindings/iommu/arm,smmu.txt
View File

@ -17,10 +17,20 @@ conditions.
"arm,mmu-401"
"arm,mmu-500"
"cavium,smmu-v2"
"qcom,smmu-v2"
depending on the particular implementation and/or the
version of the architecture implemented.
Qcom SoCs must contain, as below, SoC-specific compatibles
along with "qcom,smmu-v2":
"qcom,msm8996-smmu-v2", "qcom,smmu-v2",
"qcom,sdm845-smmu-v2", "qcom,smmu-v2".
Qcom SoCs implementing "arm,mmu-500" must also include,
as below, SoC-specific compatibles:
"qcom,sdm845-smmu-500", "arm,mmu-500"
- reg : Base address and size of the SMMU.
- #global-interrupts : The number of global interrupts exposed by the
@ -71,6 +81,22 @@ conditions.
or using stream matching with #iommu-cells = <2>, and
may be ignored if present in such cases.
- clock-names: List of the names of clocks input to the device. The
required list depends on particular implementation and
is as follows:
- for "qcom,smmu-v2":
- "bus": clock required for downstream bus access and
for the smmu ptw,
- "iface": clock required to access smmu's registers
through the TCU's programming interface.
- unspecified for other implementations.
- clocks: Specifiers for all clocks listed in the clock-names property,
as per generic clock bindings.
- power-domains: Specifiers for power domains required to be powered on for
the SMMU to operate, as per generic power domain bindings.
** Deprecated properties:
- mmu-masters (deprecated in favour of the generic "iommus" binding) :
@ -137,3 +163,20 @@ conditions.
iommu-map = <0 &smmu3 0 0x400>;
...
};
/* Qcom's arm,smmu-v2 implementation */
smmu4: iommu@d00000 {
compatible = "qcom,msm8996-smmu-v2", "qcom,smmu-v2";
reg = <0xd00000 0x10000>;
#global-interrupts = <1>;
interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 320 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 321 IRQ_TYPE_LEVEL_HIGH>;
#iommu-cells = <1>;
power-domains = <&mmcc MDSS_GDSC>;
clocks = <&mmcc SMMU_MDP_AXI_CLK>,
<&mmcc SMMU_MDP_AHB_CLK>;
clock-names = "bus", "iface";
};

2
Documentation/devicetree/bindings/iommu/renesas,ipmmu-vmsa.txt
View File

@ -14,6 +14,8 @@ Required Properties:
- "renesas,ipmmu-r8a7743" for the R8A7743 (RZ/G1M) IPMMU.
- "renesas,ipmmu-r8a7744" for the R8A7744 (RZ/G1N) IPMMU.
- "renesas,ipmmu-r8a7745" for the R8A7745 (RZ/G1E) IPMMU.
- "renesas,ipmmu-r8a774a1" for the R8A774A1 (RZ/G2M) IPMMU.
- "renesas,ipmmu-r8a774c0" for the R8A774C0 (RZ/G2E) IPMMU.
- "renesas,ipmmu-r8a7790" for the R8A7790 (R-Car H2) IPMMU.
- "renesas,ipmmu-r8a7791" for the R8A7791 (R-Car M2-W) IPMMU.
- "renesas,ipmmu-r8a7793" for the R8A7793 (R-Car M2-N) IPMMU.

2
arch/powerpc/kernel/eeh.c
View File

@ -1472,7 +1472,7 @@ static int dev_has_iommu_table(struct device *dev, void *data)
if (!dev)
return 0;
if (dev->iommu_group) {
if (device_iommu_mapped(dev)) {
*ppdev = pdev;
return 1;
}

4
arch/powerpc/kernel/iommu.c
View File

@ -1088,7 +1088,7 @@ int iommu_add_device(struct iommu_table_group *table_group, struct device *dev)
if (!device_is_registered(dev))
return -ENOENT;
if (dev->iommu_group) {
if (device_iommu_mapped(dev)) {
pr_debug("%s: Skipping device %s with iommu group %d\n",
__func__, dev_name(dev),
iommu_group_id(dev->iommu_group));
@ -1109,7 +1109,7 @@ void iommu_del_device(struct device *dev)
* and we needn't detach them from the associated
* IOMMU groups
*/
if (!dev->iommu_group) {
if (!device_iommu_mapped(dev)) {
pr_debug("iommu_tce: skipping device %s with no tbl\n",
dev_name(dev));
return;

2
arch/x86/kernel/tboot.c
View File

@ -19,7 +19,7 @@
*
*/
#include <linux/dma_remapping.h>
#include <linux/intel-iommu.h>
#include <linux/init_task.h>
#include <linux/spinlock.h>
#include <linux/export.h>

23
drivers/acpi/arm64/iort.c
View File

@ -779,7 +779,7 @@ static inline bool iort_iommu_driver_enabled(u8 type)
static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev)
{
struct acpi_iort_node *iommu;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
iommu = iort_get_iort_node(fwspec->iommu_fwnode);
@ -794,9 +794,10 @@ static struct acpi_iort_node *iort_get_msi_resv_iommu(struct device *dev)
return NULL;
}
static inline const struct iommu_ops *iort_fwspec_iommu_ops(
struct iommu_fwspec *fwspec)
static inline const struct iommu_ops *iort_fwspec_iommu_ops(struct device *dev)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
return (fwspec && fwspec->ops) ? fwspec->ops : NULL;
}
@ -805,8 +806,8 @@ static inline int iort_add_device_replay(const struct iommu_ops *ops,
{
int err = 0;
if (ops->add_device && dev->bus && !dev->iommu_group)
err = ops->add_device(dev);
if (dev->bus && !device_iommu_mapped(dev))
err = iommu_probe_device(dev);
return err;
}
@ -824,6 +825,7 @@ static inline int iort_add_device_replay(const struct iommu_ops *ops,
*/
int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct acpi_iort_its_group *its;
struct acpi_iort_node *iommu_node, *its_node = NULL;
int i, resv = 0;
@ -841,9 +843,9 @@ int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
* a given PCI or named component may map IDs to.
*/
for (i = 0; i < dev->iommu_fwspec->num_ids; i++) {
for (i = 0; i < fwspec->num_ids; i++) {
its_node = iort_node_map_id(iommu_node,
dev->iommu_fwspec->ids[i],
fwspec->ids[i],
NULL, IORT_MSI_TYPE);
if (its_node)
break;
@ -874,8 +876,7 @@ int iort_iommu_msi_get_resv_regions(struct device *dev, struct list_head *head)
return (resv == its->its_count) ? resv : -ENODEV;
}
#else
static inline const struct iommu_ops *iort_fwspec_iommu_ops(
struct iommu_fwspec *fwspec)
static inline const struct iommu_ops *iort_fwspec_iommu_ops(struct device *dev);
{ return NULL; }
static inline int iort_add_device_replay(const struct iommu_ops *ops,
struct device *dev)
@ -1045,7 +1046,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
* If we already translated the fwspec there
* is nothing left to do, return the iommu_ops.
*/
ops = iort_fwspec_iommu_ops(dev->iommu_fwspec);
ops = iort_fwspec_iommu_ops(dev);
if (ops)
return ops;
@ -1084,7 +1085,7 @@ const struct iommu_ops *iort_iommu_configure(struct device *dev)
* add_device callback for dev, replay it to get things in order.
*/
if (!err) {
ops = iort_fwspec_iommu_ops(dev->iommu_fwspec);
ops = iort_fwspec_iommu_ops(dev);
err = iort_add_device_replay(ops, dev);
}

2
drivers/dma/sh/rcar-dmac.c
View File

@ -1809,7 +1809,7 @@ static int rcar_dmac_probe(struct platform_device *pdev)
* level we can't disable it selectively, so ignore channel 0 for now if
* the device is part of an IOMMU group.
*/
if (pdev->dev.iommu_group) {
if (device_iommu_mapped(&pdev->dev)) {
dmac->n_channels--;
channels_offset = 1;
}

2
drivers/gpu/drm/i915/i915_gem_execbuffer.c
View File

@ -26,7 +26,7 @@
*
*/
#include <linux/dma_remapping.h>
#include <linux/intel-iommu.h>
#include <linux/reservation.h>
#include <linux/sync_file.h>
#include <linux/uaccess.h>

2
drivers/gpu/drm/i915/intel_display.c
View File

@ -46,7 +46,7 @@
#include <drm/drm_plane_helper.h>
#include <drm/drm_rect.h>
#include <drm/drm_atomic_uapi.h>
#include <linux/dma_remapping.h>
#include <linux/intel-iommu.h>
#include <linux/reservation.h>
/* Primary plane formats for gen <= 3 */

2
drivers/gpu/drm/vmwgfx/vmwgfx_drv.c
View File

@ -34,7 +34,7 @@
#include <drm/ttm/ttm_placement.h>
#include <drm/ttm/ttm_bo_driver.h>
#include <drm/ttm/ttm_module.h>
#include <linux/dma_remapping.h>
#include <linux/intel-iommu.h>
#define VMWGFX_DRIVER_DESC "Linux drm driver for VMware graphics devices"
#define VMWGFX_CHIP_SVGAII 0

271
drivers/iommu/amd_iommu.c
View File

@ -17,6 +17,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define pr_fmt(fmt) "AMD-Vi: " fmt
#include <linux/ratelimit.h>
#include <linux/pci.h>
#include <linux/acpi.h>
@ -277,7 +279,7 @@ static u16 get_alias(struct device *dev)
return pci_alias;
}
pr_info("AMD-Vi: Using IVRS reported alias %02x:%02x.%d "
pr_info("Using IVRS reported alias %02x:%02x.%d "
"for device %s[%04x:%04x], kernel reported alias "
"%02x:%02x.%d\n", PCI_BUS_NUM(ivrs_alias), PCI_SLOT(ivrs_alias),
PCI_FUNC(ivrs_alias), dev_name(dev), pdev->vendor, pdev->device,
@ -291,7 +293,7 @@ static u16 get_alias(struct device *dev)
if (pci_alias == devid &&
PCI_BUS_NUM(ivrs_alias) == pdev->bus->number) {
pci_add_dma_alias(pdev, ivrs_alias & 0xff);
pr_info("AMD-Vi: Added PCI DMA alias %02x.%d for %s\n",
pr_info("Added PCI DMA alias %02x.%d for %s\n",
PCI_SLOT(ivrs_alias), PCI_FUNC(ivrs_alias),
dev_name(dev));
}
@ -436,7 +438,14 @@ static int iommu_init_device(struct device *dev)
dev_data->alias = get_alias(dev);
if (dev_is_pci(dev) && pci_iommuv2_capable(to_pci_dev(dev))) {
/*
* By default we use passthrough mode for IOMMUv2 capable device.
* But if amd_iommu=force_isolation is set (e.g. to debug DMA to
* invalid address), we ignore the capability for the device so
* it'll be forced to go into translation mode.
*/
if ((iommu_pass_through || !amd_iommu_force_isolation) &&
dev_is_pci(dev) && pci_iommuv2_capable(to_pci_dev(dev))) {
struct amd_iommu *iommu;
iommu = amd_iommu_rlookup_table[dev_data->devid];
@ -511,7 +520,7 @@ static void dump_dte_entry(u16 devid)
int i;
for (i = 0; i < 4; ++i)
pr_err("AMD-Vi: DTE[%d]: %016llx\n", i,
pr_err("DTE[%d]: %016llx\n", i,
amd_iommu_dev_table[devid].data[i]);
}
@ -521,7 +530,7 @@ static void dump_command(unsigned long phys_addr)
int i;
for (i = 0; i < 4; ++i)
pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]);
pr_err("CMD[%d]: %08x\n", i, cmd->data[i]);
}
static void amd_iommu_report_page_fault(u16 devid, u16 domain_id,
@ -536,10 +545,10 @@ static void amd_iommu_report_page_fault(u16 devid, u16 domain_id,
dev_data = get_dev_data(&pdev->dev);
if (dev_data && __ratelimit(&dev_data->rs)) {
dev_err(&pdev->dev, "AMD-Vi: Event logged [IO_PAGE_FAULT domain=0x%04x address=0x%016llx flags=0x%04x]\n",
dev_err(&pdev->dev, "Event logged [IO_PAGE_FAULT domain=0x%04x address=0x%llx flags=0x%04x]\n",
domain_id, address, flags);
} else if (printk_ratelimit()) {
pr_err("AMD-Vi: Event logged [IO_PAGE_FAULT device=%02x:%02x.%x domain=0x%04x address=0x%016llx flags=0x%04x]\n",
pr_err("Event logged [IO_PAGE_FAULT device=%02x:%02x.%x domain=0x%04x address=0x%llx flags=0x%04x]\n",
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
domain_id, address, flags);
}
@ -566,7 +575,7 @@ retry:
if (type == 0) {
/* Did we hit the erratum? */
if (++count == LOOP_TIMEOUT) {
pr_err("AMD-Vi: No event written to event log\n");
pr_err("No event written to event log\n");
return;
}
udelay(1);
@ -576,43 +585,41 @@ retry:
if (type == EVENT_TYPE_IO_FAULT) {
amd_iommu_report_page_fault(devid, pasid, address, flags);
return;
} else {
dev_err(dev, "AMD-Vi: Event logged [");
}
switch (type) {
case EVENT_TYPE_ILL_DEV:
dev_err(dev, "ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x pasid=0x%05x address=0x%016llx flags=0x%04x]\n",
dev_err(dev, "Event logged [ILLEGAL_DEV_TABLE_ENTRY device=%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x]\n",
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
pasid, address, flags);
dump_dte_entry(devid);
break;
case EVENT_TYPE_DEV_TAB_ERR:
dev_err(dev, "DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x "
"address=0x%016llx flags=0x%04x]\n",
dev_err(dev, "Event logged [DEV_TAB_HARDWARE_ERROR device=%02x:%02x.%x "
"address=0x%llx flags=0x%04x]\n",
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
address, flags);
break;
case EVENT_TYPE_PAGE_TAB_ERR:
dev_err(dev, "PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x domain=0x%04x address=0x%016llx flags=0x%04x]\n",
dev_err(dev, "Event logged [PAGE_TAB_HARDWARE_ERROR device=%02x:%02x.%x domain=0x%04x address=0x%llx flags=0x%04x]\n",
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
pasid, address, flags);
break;
case EVENT_TYPE_ILL_CMD:
dev_err(dev, "ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address);
dev_err(dev, "Event logged [ILLEGAL_COMMAND_ERROR address=0x%llx]\n", address);
dump_command(address);
break;
case EVENT_TYPE_CMD_HARD_ERR:
dev_err(dev, "COMMAND_HARDWARE_ERROR address=0x%016llx flags=0x%04x]\n",
dev_err(dev, "Event logged [COMMAND_HARDWARE_ERROR address=0x%llx flags=0x%04x]\n",
address, flags);
break;
case EVENT_TYPE_IOTLB_INV_TO:
dev_err(dev, "IOTLB_INV_TIMEOUT device=%02x:%02x.%x address=0x%016llx]\n",
dev_err(dev, "Event logged [IOTLB_INV_TIMEOUT device=%02x:%02x.%x address=0x%llx]\n",
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
address);
break;
case EVENT_TYPE_INV_DEV_REQ:
dev_err(dev, "INVALID_DEVICE_REQUEST device=%02x:%02x.%x pasid=0x%05x address=0x%016llx flags=0x%04x]\n",
dev_err(dev, "Event logged [INVALID_DEVICE_REQUEST device=%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x]\n",
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
pasid, address, flags);
break;
@ -620,12 +627,12 @@ retry:
pasid = ((event[0] >> 16) & 0xFFFF)
| ((event[1] << 6) & 0xF0000);
tag = event[1] & 0x03FF;
dev_err(dev, "INVALID_PPR_REQUEST device=%02x:%02x.%x pasid=0x%05x address=0x%016llx flags=0x%04x]\n",
dev_err(dev, "Event logged [INVALID_PPR_REQUEST device=%02x:%02x.%x pasid=0x%05x address=0x%llx flags=0x%04x]\n",
PCI_BUS_NUM(devid), PCI_SLOT(devid), PCI_FUNC(devid),
pasid, address, flags);
break;
default:
dev_err(dev, "UNKNOWN event[0]=0x%08x event[1]=0x%08x event[2]=0x%08x event[3]=0x%08x\n",
dev_err(dev, "Event logged [UNKNOWN event[0]=0x%08x event[1]=0x%08x event[2]=0x%08x event[3]=0x%08x\n",
event[0], event[1], event[2], event[3]);
}
@ -652,7 +659,7 @@ static void iommu_handle_ppr_entry(struct amd_iommu *iommu, u64 *raw)
struct amd_iommu_fault fault;
if (PPR_REQ_TYPE(raw[0]) != PPR_REQ_FAULT) {
pr_err_ratelimited("AMD-Vi: Unknown PPR request received\n");
pr_err_ratelimited("Unknown PPR request received\n");
return;
}
@ -757,12 +764,12 @@ static void iommu_poll_ga_log(struct amd_iommu *iommu)
if (!iommu_ga_log_notifier)
break;
pr_debug("AMD-Vi: %s: devid=%#x, ga_tag=%#x\n",
pr_debug("%s: devid=%#x, ga_tag=%#x\n",
__func__, GA_DEVID(log_entry),
GA_TAG(log_entry));
if (iommu_ga_log_notifier(GA_TAG(log_entry)) != 0)
pr_err("AMD-Vi: GA log notifier failed.\n");
pr_err("GA log notifier failed.\n");
break;
default:
break;
@ -787,18 +794,18 @@ irqreturn_t amd_iommu_int_thread(int irq, void *data)
iommu->mmio_base + MMIO_STATUS_OFFSET);
if (status & MMIO_STATUS_EVT_INT_MASK) {
pr_devel("AMD-Vi: Processing IOMMU Event Log\n");
pr_devel("Processing IOMMU Event Log\n");
iommu_poll_events(iommu);
}
if (status & MMIO_STATUS_PPR_INT_MASK) {
pr_devel("AMD-Vi: Processing IOMMU PPR Log\n");
pr_devel("Processing IOMMU PPR Log\n");
iommu_poll_ppr_log(iommu);
}
#ifdef CONFIG_IRQ_REMAP
if (status & MMIO_STATUS_GALOG_INT_MASK) {
pr_devel("AMD-Vi: Processing IOMMU GA Log\n");
pr_devel("Processing IOMMU GA Log\n");
iommu_poll_ga_log(iommu);
}
#endif
@ -842,7 +849,7 @@ static int wait_on_sem(volatile u64 *sem)
}
if (i == LOOP_TIMEOUT) {
pr_alert("AMD-Vi: Completion-Wait loop timed out\n");
pr_alert("Completion-Wait loop timed out\n");
return -EIO;
}
@ -1034,7 +1041,7 @@ again:
/* Skip udelay() the first time around */
if (count++) {
if (count == LOOP_TIMEOUT) {
pr_err("AMD-Vi: Command buffer timeout\n");
pr_err("Command buffer timeout\n");
return -EIO;
}
@ -1315,6 +1322,101 @@ static void domain_flush_devices(struct protection_domain *domain)
*
****************************************************************************/
static void free_page_list(struct page *freelist)
{
while (freelist != NULL) {
unsigned long p = (unsigned long)page_address(freelist);
freelist = freelist->freelist;
free_page(p);
}
}
static struct page *free_pt_page(unsigned long pt, struct page *freelist)
{
struct page *p = virt_to_page((void *)pt);
p->freelist = freelist;
return p;
}
#define DEFINE_FREE_PT_FN(LVL, FN) \
static struct page *free_pt_##LVL (unsigned long __pt, struct page *freelist) \
{ \
unsigned long p; \
u64 *pt; \
int i; \
\
pt = (u64 *)__pt; \
\
for (i = 0; i < 512; ++i) { \
/* PTE present? */ \
if (!IOMMU_PTE_PRESENT(pt[i])) \
continue; \
\
/* Large PTE? */ \
if (PM_PTE_LEVEL(pt[i]) == 0 || \
PM_PTE_LEVEL(pt[i]) == 7) \
continue; \
\
p = (unsigned long)IOMMU_PTE_PAGE(pt[i]); \
freelist = FN(p, freelist); \
} \
\
return free_pt_page((unsigned long)pt, freelist); \
}
DEFINE_FREE_PT_FN(l2, free_pt_page)
DEFINE_FREE_PT_FN(l3, free_pt_l2)
DEFINE_FREE_PT_FN(l4, free_pt_l3)
DEFINE_FREE_PT_FN(l5, free_pt_l4)
DEFINE_FREE_PT_FN(l6, free_pt_l5)
static struct page *free_sub_pt(unsigned long root, int mode,
struct page *freelist)
{
switch (mode) {
case PAGE_MODE_NONE:
case PAGE_MODE_7_LEVEL:
break;
case PAGE_MODE_1_LEVEL:
freelist = free_pt_page(root, freelist);
break;
case PAGE_MODE_2_LEVEL:
freelist = free_pt_l2(root, freelist);
break;
case PAGE_MODE_3_LEVEL:
freelist = free_pt_l3(root, freelist);
break;
case PAGE_MODE_4_LEVEL:
freelist = free_pt_l4(root, freelist);
break;
case PAGE_MODE_5_LEVEL:
freelist = free_pt_l5(root, freelist);
break;
case PAGE_MODE_6_LEVEL:
freelist = free_pt_l6(root, freelist);
break;
default:
BUG();
}
return freelist;
}
static void free_pagetable(struct protection_domain *domain)
{
unsigned long root = (unsigned long)domain->pt_root;
struct page *freelist = NULL;
BUG_ON(domain->mode < PAGE_MODE_NONE ||
domain->mode > PAGE_MODE_6_LEVEL);
free_sub_pt(root, domain->mode, freelist);
free_page_list(freelist);
}
/*
* This function is used to add another level to an IO page table. Adding
* another level increases the size of the address space by 9 bits to a size up
@ -1363,10 +1465,13 @@ static u64 *alloc_pte(struct protection_domain *domain,
while (level > end_lvl) {
u64 __pte, __npte;
int pte_level;
__pte = *pte;
pte_level = PM_PTE_LEVEL(__pte);
if (!IOMMU_PTE_PRESENT(__pte)) {
if (!IOMMU_PTE_PRESENT(__pte) ||
pte_level == PAGE_MODE_7_LEVEL) {
page = (u64 *)get_zeroed_page(gfp);
if (!page)
return NULL;
@ -1374,19 +1479,21 @@ static u64 *alloc_pte(struct protection_domain *domain,
__npte = PM_LEVEL_PDE(level, iommu_virt_to_phys(page));
/* pte could have been changed somewhere. */
if (cmpxchg64(pte, __pte, __npte) != __pte) {
if (cmpxchg64(pte, __pte, __npte) != __pte)
free_page((unsigned long)page);
else if (pte_level == PAGE_MODE_7_LEVEL)
domain->updated = true;
continue;
}
}
/* No level skipping support yet */
if (PM_PTE_LEVEL(*pte) != level)
if (pte_level != level)
return NULL;
level -= 1;
pte = IOMMU_PTE_PAGE(*pte);
pte = IOMMU_PTE_PAGE(__pte);
if (pte_page && level == end_lvl)
*pte_page = pte;
@ -1455,6 +1562,25 @@ static u64 *fetch_pte(struct protection_domain *domain,
return pte;
}
static struct page *free_clear_pte(u64 *pte, u64 pteval, struct page *freelist)
{
unsigned long pt;
int mode;
while (cmpxchg64(pte, pteval, 0) != pteval) {
pr_warn("AMD-Vi: IOMMU pte changed since we read it\n");
pteval = *pte;
}
if (!IOMMU_PTE_PRESENT(pteval))
return freelist;
pt = (unsigned long)IOMMU_PTE_PAGE(pteval);
mode = IOMMU_PTE_MODE(pteval);
return free_sub_pt(pt, mode, freelist);
}
/*
* Generic mapping functions. It maps a physical address into a DMA
* address space. It allocates the page table pages if necessary.
@ -1469,6 +1595,7 @@ static int iommu_map_page(struct protection_domain *dom,
int prot,
gfp_t gfp)
{
struct page *freelist = NULL;
u64 __pte, *pte;
int i, count;
@ -1485,8 +1612,10 @@ static int iommu_map_page(struct protection_domain *dom,
return -ENOMEM;
for (i = 0; i < count; ++i)
if (IOMMU_PTE_PRESENT(pte[i]))
return -EBUSY;
freelist = free_clear_pte(&pte[i], pte[i], freelist);
if (freelist != NULL)
dom->updated = true;
if (count > 1) {
__pte = PAGE_SIZE_PTE(__sme_set(phys_addr), page_size);
@ -1504,6 +1633,9 @@ static int iommu_map_page(struct protection_domain *dom,
update_domain(dom);
/* Everything flushed out, free pages now */
free_page_list(freelist);
return 0;
}
@ -1636,67 +1768,6 @@ static void domain_id_free(int id)
spin_unlock(&pd_bitmap_lock);
}
#define DEFINE_FREE_PT_FN(LVL, FN) \
static void free_pt_##LVL (unsigned long __pt) \
{ \
unsigned long p; \
u64 *pt; \
int i; \
\
pt = (u64 *)__pt; \
\
for (i = 0; i < 512; ++i) { \
/* PTE present? */ \
if (!IOMMU_PTE_PRESENT(pt[i])) \
continue; \
\
/* Large PTE? */ \
if (PM_PTE_LEVEL(pt[i]) == 0 || \
PM_PTE_LEVEL(pt[i]) == 7) \
continue; \
\
p = (unsigned long)IOMMU_PTE_PAGE(pt[i]); \
FN(p); \
} \
free_page((unsigned long)pt); \
}
DEFINE_FREE_PT_FN(l2, free_page)
DEFINE_FREE_PT_FN(l3, free_pt_l2)
DEFINE_FREE_PT_FN(l4, free_pt_l3)
DEFINE_FREE_PT_FN(l5, free_pt_l4)
DEFINE_FREE_PT_FN(l6, free_pt_l5)
static void free_pagetable(struct protection_domain *domain)
{
unsigned long root = (unsigned long)domain->pt_root;
switch (domain->mode) {
case PAGE_MODE_NONE:
break;
case PAGE_MODE_1_LEVEL:
free_page(root);
break;
case PAGE_MODE_2_LEVEL:
free_pt_l2(root);
break;
case PAGE_MODE_3_LEVEL:
free_pt_l3(root);
break;
case PAGE_MODE_4_LEVEL:
free_pt_l4(root);
break;
case PAGE_MODE_5_LEVEL:
free_pt_l5(root);
break;
case PAGE_MODE_6_LEVEL:
free_pt_l6(root);
break;
default:
BUG();
}
}
static void free_gcr3_tbl_level1(u64 *tbl)
{
u64 *ptr;
@ -2771,9 +2842,9 @@ int __init amd_iommu_init_dma_ops(void)
iommu_detected = 1;
if (amd_iommu_unmap_flush)
pr_info("AMD-Vi: IO/TLB flush on unmap enabled\n");
pr_info("IO/TLB flush on unmap enabled\n");
else
pr_info("AMD-Vi: Lazy IO/TLB flushing enabled\n");
pr_info("Lazy IO/TLB flushing enabled\n");
return 0;
@ -2878,7 +2949,7 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
case IOMMU_DOMAIN_DMA:
dma_domain = dma_ops_domain_alloc();
if (!dma_domain) {
pr_err("AMD-Vi: Failed to allocate\n");
pr_err("Failed to allocate\n");
return NULL;
}
pdomain = &dma_domain->domain;
@ -4299,7 +4370,7 @@ static int amd_ir_set_vcpu_affinity(struct irq_data *data, void *vcpu_info)
* legacy mode. So, we force legacy mode instead.
*/
if (!AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir)) {
pr_debug("AMD-Vi: %s: Fall back to using intr legacy remap\n",
pr_debug("%s: Fall back to using intr legacy remap\n",
__func__);
pi_data->is_guest_mode = false;
}

64
drivers/iommu/amd_iommu_init.c
View File

@ -17,6 +17,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define pr_fmt(fmt) "AMD-Vi: " fmt
#include <linux/pci.h>
#include <linux/acpi.h>
#include <linux/list.h>
@ -443,9 +445,9 @@ static void iommu_disable(struct amd_iommu *iommu)
static u8 __iomem * __init iommu_map_mmio_space(u64 address, u64 end)
{
if (!request_mem_region(address, end, "amd_iommu")) {
pr_err("AMD-Vi: Can not reserve memory region %llx-%llx for mmio\n",
pr_err("Can not reserve memory region %llx-%llx for mmio\n",
address, end);
pr_err("AMD-Vi: This is a BIOS bug. Please contact your hardware vendor\n");
pr_err("This is a BIOS bug. Please contact your hardware vendor\n");
return NULL;
}
@ -512,7 +514,7 @@ static int __init find_last_devid_from_ivhd(struct ivhd_header *h)
u32 ivhd_size = get_ivhd_header_size(h);
if (!ivhd_size) {
pr_err("AMD-Vi: Unsupported IVHD type %#x\n", h->type);
pr_err("Unsupported IVHD type %#x\n", h->type);
return -EINVAL;
}
@ -553,7 +555,7 @@ static int __init check_ivrs_checksum(struct acpi_table_header *table)
checksum += p[i];
if (checksum != 0) {
/* ACPI table corrupt */
pr_err(FW_BUG "AMD-Vi: IVRS invalid checksum\n");
pr_err(FW_BUG "IVRS invalid checksum\n");
return -ENODEV;
}
@ -1028,7 +1030,7 @@ static int __init add_special_device(u8 type, u8 id, u16 *devid, bool cmd_line)
if (!(entry->id == id && entry->cmd_line))
continue;
pr_info("AMD-Vi: Command-line override present for %s id %d - ignoring\n",
pr_info("Command-line override present for %s id %d - ignoring\n",
type == IVHD_SPECIAL_IOAPIC ? "IOAPIC" : "HPET", id);
*devid = entry->devid;
@ -1061,7 +1063,7 @@ static int __init add_acpi_hid_device(u8 *hid, u8 *uid, u16 *devid,
!entry->cmd_line)
continue;
pr_info("AMD-Vi: Command-line override for hid:%s uid:%s\n",
pr_info("Command-line override for hid:%s uid:%s\n",
hid, uid);
*devid = entry->devid;
return 0;
@ -1077,7 +1079,7 @@ static int __init add_acpi_hid_device(u8 *hid, u8 *uid, u16 *devid,
entry->cmd_line = cmd_line;
entry->root_devid = (entry->devid & (~0x7));
pr_info("AMD-Vi:%s, add hid:%s, uid:%s, rdevid:%d\n",
pr_info("%s, add hid:%s, uid:%s, rdevid:%d\n",
entry->cmd_line ? "cmd" : "ivrs",
entry->hid, entry->uid, entry->root_devid);
@ -1173,7 +1175,7 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu,
*/
ivhd_size = get_ivhd_header_size(h);
if (!ivhd_size) {
pr_err("AMD-Vi: Unsupported IVHD type %#x\n", h->type);
pr_err("Unsupported IVHD type %#x\n", h->type);
return -EINVAL;
}
@ -1455,7 +1457,7 @@ static void amd_iommu_erratum_746_workaround(struct amd_iommu *iommu)
pci_write_config_dword(iommu->dev, 0xf0, 0x90 | (1 << 8));
pci_write_config_dword(iommu->dev, 0xf4, value | 0x4);
pr_info("AMD-Vi: Applying erratum 746 workaround for IOMMU at %s\n",
pr_info("Applying erratum 746 workaround for IOMMU at %s\n",
dev_name(&iommu->dev->dev));
/* Clear the enable writing bit */
@ -1486,7 +1488,7 @@ static void amd_iommu_ats_write_check_workaround(struct amd_iommu *iommu)
/* Set L2_DEBUG_3[AtsIgnoreIWDis] = 1 */
iommu_write_l2(iommu, 0x47, value | BIT(0));
pr_info("AMD-Vi: Applying ATS write check workaround for IOMMU at %s\n",
pr_info("Applying ATS write check workaround for IOMMU at %s\n",
dev_name(&iommu->dev->dev));
}
@ -1506,7 +1508,7 @@ static int __init init_iommu_one(struct amd_iommu *iommu, struct ivhd_header *h)
iommu->index = amd_iommus_present++;
if (unlikely(iommu->index >= MAX_IOMMUS)) {
WARN(1, "AMD-Vi: System has more IOMMUs than supported by this driver\n");
WARN(1, "System has more IOMMUs than supported by this driver\n");
return -ENOSYS;
}
@ -1674,12 +1676,12 @@ static void init_iommu_perf_ctr(struct amd_iommu *iommu)
if ((iommu_pc_get_set_reg(iommu, 0, 0, 0, &val, true)) ||
(iommu_pc_get_set_reg(iommu, 0, 0, 0, &val2, false)) ||
(val != val2)) {
pr_err("AMD-Vi: Unable to write to IOMMU perf counter.\n");
pr_err("Unable to write to IOMMU perf counter.\n");
amd_iommu_pc_present = false;
return;
}
pr_info("AMD-Vi: IOMMU performance counters supported\n");
pr_info("IOMMU performance counters supported\n");
val = readl(iommu->mmio_base + MMIO_CNTR_CONF_OFFSET);
iommu->max_banks = (u8) ((val >> 12) & 0x3f);
@ -1840,11 +1842,11 @@ static void print_iommu_info(void)
for_each_iommu(iommu) {
int i;
pr_info("AMD-Vi: Found IOMMU at %s cap 0x%hx\n",
pr_info("Found IOMMU at %s cap 0x%hx\n",
dev_name(&iommu->dev->dev), iommu->cap_ptr);
if (iommu->cap & (1 << IOMMU_CAP_EFR)) {
pr_info("AMD-Vi: Extended features (%#llx):\n",
pr_info("Extended features (%#llx):\n",
iommu->features);
for (i = 0; i < ARRAY_SIZE(feat_str); ++i) {
if (iommu_feature(iommu, (1ULL << i)))
@ -1858,11 +1860,11 @@ static void print_iommu_info(void)
}
}
if (irq_remapping_enabled) {
pr_info("AMD-Vi: Interrupt remapping enabled\n");
pr_info("Interrupt remapping enabled\n");
if (AMD_IOMMU_GUEST_IR_VAPIC(amd_iommu_guest_ir))
pr_info("AMD-Vi: virtual APIC enabled\n");
pr_info("Virtual APIC enabled\n");
if (amd_iommu_xt_mode == IRQ_REMAP_X2APIC_MODE)
pr_info("AMD-Vi: X2APIC enabled\n");
pr_info("X2APIC enabled\n");
}
}
@ -2376,7 +2378,7 @@ static bool __init check_ioapic_information(void)
devid = get_ioapic_devid(id);
if (devid < 0) {
pr_err("%sAMD-Vi: IOAPIC[%d] not in IVRS table\n",
pr_err("%s: IOAPIC[%d] not in IVRS table\n",
fw_bug, id);
ret = false;
} else if (devid == IOAPIC_SB_DEVID) {
@ -2394,11 +2396,11 @@ static bool __init check_ioapic_information(void)
* when the BIOS is buggy and provides us the wrong
* device id for the IOAPIC in the system.
*/
pr_err("%sAMD-Vi: No southbridge IOAPIC found\n", fw_bug);
pr_err("%s: No southbridge IOAPIC found\n", fw_bug);
}
if (!ret)
pr_err("AMD-Vi: Disabling interrupt remapping\n");
pr_err("Disabling interrupt remapping\n");
return ret;
}
@ -2453,7 +2455,7 @@ static int __init early_amd_iommu_init(void)
return -ENODEV;
else if (ACPI_FAILURE(status)) {
const char *err = acpi_format_exception(status);
pr_err("AMD-Vi: IVRS table error: %s\n", err);
pr_err("IVRS table error: %s\n", err);
return -EINVAL;
}
@ -2606,7 +2608,7 @@ static bool detect_ivrs(void)
return false;
else if (ACPI_FAILURE(status)) {
const char *err = acpi_format_exception(status);
pr_err("AMD-Vi: IVRS table error: %s\n", err);
pr_err("IVRS table error: %s\n", err);
return false;
}
@ -2641,7 +2643,7 @@ static int __init state_next(void)
ret = early_amd_iommu_init();
init_state = ret ? IOMMU_INIT_ERROR : IOMMU_ACPI_FINISHED;
if (init_state == IOMMU_ACPI_FINISHED && amd_iommu_disabled) {
pr_info("AMD-Vi: AMD IOMMU disabled on kernel command-line\n");
pr_info("AMD IOMMU disabled on kernel command-line\n");
free_dma_resources();
free_iommu_resources();
init_state = IOMMU_CMDLINE_DISABLED;
@ -2788,7 +2790,7 @@ static bool amd_iommu_sme_check(void)
(boot_cpu_data.microcode <= 0x080011ff))
return true;
pr_notice("AMD-Vi: IOMMU not currently supported when SME is active\n");
pr_notice("IOMMU not currently supported when SME is active\n");
return false;
}
@ -2873,12 +2875,12 @@ static int __init parse_ivrs_ioapic(char *str)
ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn);
if (ret != 4) {
pr_err("AMD-Vi: Invalid command line: ivrs_ioapic%s\n", str);
pr_err("Invalid command line: ivrs_ioapic%s\n", str);
return 1;
}
if (early_ioapic_map_size == EARLY_MAP_SIZE) {
pr_err("AMD-Vi: Early IOAPIC map overflow - ignoring ivrs_ioapic%s\n",
pr_err("Early IOAPIC map overflow - ignoring ivrs_ioapic%s\n",
str);
return 1;
}
@ -2903,12 +2905,12 @@ static int __init parse_ivrs_hpet(char *str)
ret = sscanf(str, "[%d]=%x:%x.%x", &id, &bus, &dev, &fn);
if (ret != 4) {
pr_err("AMD-Vi: Invalid command line: ivrs_hpet%s\n", str);
pr_err("Invalid command line: ivrs_hpet%s\n", str);
return 1;
}
if (early_hpet_map_size == EARLY_MAP_SIZE) {
pr_err("AMD-Vi: Early HPET map overflow - ignoring ivrs_hpet%s\n",
pr_err("Early HPET map overflow - ignoring ivrs_hpet%s\n",
str);
return 1;
}
@ -2933,7 +2935,7 @@ static int __init parse_ivrs_acpihid(char *str)
ret = sscanf(str, "[%x:%x.%x]=%s", &bus, &dev, &fn, acpiid);
if (ret != 4) {
pr_err("AMD-Vi: Invalid command line: ivrs_acpihid(%s)\n", str);
pr_err("Invalid command line: ivrs_acpihid(%s)\n", str);
return 1;
}
@ -2942,7 +2944,7 @@ static int __init parse_ivrs_acpihid(char *str)
uid = p;
if (!hid || !(*hid) || !uid) {
pr_err("AMD-Vi: Invalid command line: hid or uid\n");
pr_err("Invalid command line: hid or uid\n");
return 1;
}

1
drivers/iommu/amd_iommu_types.h
View File

@ -269,6 +269,7 @@
#define PAGE_MODE_4_LEVEL 0x04
#define PAGE_MODE_5_LEVEL 0x05
#define PAGE_MODE_6_LEVEL 0x06
#define PAGE_MODE_7_LEVEL 0x07
#define PM_LEVEL_SHIFT(x) (12 + ((x) * 9))
#define PM_LEVEL_SIZE(x) (((x) < 6) ? \

2
drivers/iommu/amd_iommu_v2.c
View File

@ -16,6 +16,8 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#define pr_fmt(fmt) "AMD-Vi: " fmt
#include <linux/mmu_notifier.h>
#include <linux/amd-iommu.h>
#include <linux/mm_types.h>

61
drivers/iommu/arm-smmu-v3.c
View File

@ -20,7 +20,8 @@
#include <linux/interrupt.h>
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/msi.h>
#include <linux/of.h>
#include <linux/of_address.h>
@ -356,6 +357,10 @@
#define MSI_IOVA_BASE 0x8000000
#define MSI_IOVA_LENGTH 0x100000
/*
* not really modular, but the easiest way to keep compat with existing
* bootargs behaviour is to continue using module_param_named here.
*/
static bool disable_bypass = 1;
module_param_named(disable_bypass, disable_bypass, bool, S_IRUGO);
MODULE_PARM_DESC(disable_bypass,
@ -576,7 +581,11 @@ struct arm_smmu_device {
struct arm_smmu_strtab_cfg strtab_cfg;
/* Hi16xx adds an extra 32 bits of goodness to its MSI payload */
union {
u32 sync_count;
u64 padding;
};
/* IOMMU core code handle */
struct iommu_device iommu;
@ -675,7 +684,13 @@ static void queue_inc_cons(struct arm_smmu_queue *q)
u32 cons = (Q_WRP(q, q->cons) | Q_IDX(q, q->cons)) + 1;
q->cons = Q_OVF(q, q->cons) | Q_WRP(q, cons) | Q_IDX(q, cons);
writel(q->cons, q->cons_reg);
/*
* Ensure that all CPU accesses (reads and writes) to the queue
* are complete before we update the cons pointer.
*/
mb();
writel_relaxed(q->cons, q->cons_reg);
}
static int queue_sync_prod(struct arm_smmu_queue *q)
@ -828,7 +843,13 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent)
cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_CS, CMDQ_SYNC_0_CS_SEV);
cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSH, ARM_SMMU_SH_ISH);
cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSIATTR, ARM_SMMU_MEMATTR_OIWB);
cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSIDATA, ent->sync.msidata);
/*
* Commands are written little-endian, but we want the SMMU to
* receive MSIData, and thus write it back to memory, in CPU
* byte order, so big-endian needs an extra byteswap here.
*/
cmd[0] |= FIELD_PREP(CMDQ_SYNC_0_MSIDATA,
cpu_to_le32(ent->sync.msidata));
cmd[1] |= ent->sync.msiaddr & CMDQ_SYNC_1_MSIADDR_MASK;
break;
default:
@ -1691,24 +1712,26 @@ static void arm_smmu_install_ste_for_dev(struct iommu_fwspec *fwspec)
static void arm_smmu_detach_dev(struct device *dev)
{
struct arm_smmu_master_data *master = dev->iommu_fwspec->iommu_priv;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct arm_smmu_master_data *master = fwspec->iommu_priv;
master->ste.assigned = false;
arm_smmu_install_ste_for_dev(dev->iommu_fwspec);
arm_smmu_install_ste_for_dev(fwspec);
}
static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
int ret = 0;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct arm_smmu_device *smmu;
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_master_data *master;
struct arm_smmu_strtab_ent *ste;
if (!dev->iommu_fwspec)
if (!fwspec)
return -ENOENT;
master = dev->iommu_fwspec->iommu_priv;
master = fwspec->iommu_priv;
smmu = master->smmu;
ste = &master->ste;
@ -1748,7 +1771,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
ste->s2_cfg = &smmu_domain->s2_cfg;
}
arm_smmu_install_ste_for_dev(dev->iommu_fwspec);
arm_smmu_install_ste_for_dev(fwspec);
out_unlock:
mutex_unlock(&smmu_domain->init_mutex);
return ret;
@ -1839,7 +1862,7 @@ static int arm_smmu_add_device(struct device *dev)
int i, ret;
struct arm_smmu_device *smmu;
struct arm_smmu_master_data *master;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct iommu_group *group;
if (!fwspec || fwspec->ops != &arm_smmu_ops)
@ -1890,7 +1913,7 @@ static int arm_smmu_add_device(struct device *dev)
static void arm_smmu_remove_device(struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct arm_smmu_master_data *master;
struct arm_smmu_device *smmu;
@ -2928,37 +2951,25 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
return 0;
}
static int arm_smmu_device_remove(struct platform_device *pdev)
static void arm_smmu_device_shutdown(struct platform_device *pdev)
{
struct arm_smmu_device *smmu = platform_get_drvdata(pdev);
arm_smmu_device_disable(smmu);
return 0;
}
static void arm_smmu_device_shutdown(struct platform_device *pdev)
{
arm_smmu_device_remove(pdev);
}
static const struct of_device_id arm_smmu_of_match[] = {
{ .compatible = "arm,smmu-v3", },
{ },
};
MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
static struct platform_driver arm_smmu_driver = {
.driver = {
.name = "arm-smmu-v3",
.of_match_table = of_match_ptr(arm_smmu_of_match),
.suppress_bind_attrs = true,
},
.probe = arm_smmu_device_probe,
.remove = arm_smmu_device_remove,
.shutdown = arm_smmu_device_shutdown,
};
module_platform_driver(arm_smmu_driver);
MODULE_DESCRIPTION("IOMMU API for ARM architected SMMUv3 implementations");
MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");
MODULE_LICENSE("GPL v2");
builtin_platform_driver(arm_smmu_driver);

203
drivers/iommu/arm-smmu.c
View File

@ -41,13 +41,15 @@
#include <linux/io-64-nonatomic-hi-lo.h>
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/of_iommu.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
@ -101,6 +103,10 @@
#define MSI_IOVA_LENGTH 0x100000
static int force_stage;
/*
* not really modular, but the easiest way to keep compat with existing
* bootargs behaviour is to continue using module_param() here.
*/
module_param(force_stage, int, S_IRUGO);
MODULE_PARM_DESC(force_stage,
"Force SMMU mappings to be installed at a particular stage of translation. A value of '1' or '2' forces the corresponding stage. All other values are ignored (i.e. no stage is forced). Note that selecting a specific stage will disable support for nested translation.");
@ -119,6 +125,7 @@ enum arm_smmu_implementation {
GENERIC_SMMU,
ARM_MMU500,
CAVIUM_SMMUV2,
QCOM_SMMUV2,
};
struct arm_smmu_s2cr {
@ -206,6 +213,8 @@ struct arm_smmu_device {
u32 num_global_irqs;
u32 num_context_irqs;
unsigned int *irqs;
struct clk_bulk_data *clks;
int num_clks;
u32 cavium_id_base; /* Specific to Cavium */
@ -267,6 +276,20 @@ static struct arm_smmu_option_prop arm_smmu_options[] = {
{ 0, NULL},
};
static inline int arm_smmu_rpm_get(struct arm_smmu_device *smmu)
{
if (pm_runtime_enabled(smmu->dev))
return pm_runtime_get_sync(smmu->dev);
return 0;
}
static inline void arm_smmu_rpm_put(struct arm_smmu_device *smmu)
{
if (pm_runtime_enabled(smmu->dev))
pm_runtime_put(smmu->dev);
}
static struct arm_smmu_domain *to_smmu_domain(struct iommu_domain *dom)
{
return container_of(dom, struct arm_smmu_domain, domain);
@ -926,11 +949,15 @@ static void arm_smmu_destroy_domain_context(struct iommu_domain *domain)
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu = smmu_domain->smmu;
struct arm_smmu_cfg *cfg = &smmu_domain->cfg;
int irq;
int ret, irq;
if (!smmu || domain->type == IOMMU_DOMAIN_IDENTITY)
return;
ret = arm_smmu_rpm_get(smmu);
if (ret < 0)
return;
/*
* Disable the context bank and free the page tables before freeing
* it.
@ -945,6 +972,8 @@ static void arm_smmu_destroy_domain_context(struct iommu_domain *domain)
free_io_pgtable_ops(smmu_domain->pgtbl_ops);
__arm_smmu_free_bitmap(smmu->context_map, cfg->cbndx);
arm_smmu_rpm_put(smmu);
}
static struct iommu_domain *arm_smmu_domain_alloc(unsigned type)
@ -1103,7 +1132,7 @@ static bool arm_smmu_free_sme(struct arm_smmu_device *smmu, int idx)
static int arm_smmu_master_alloc_smes(struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct arm_smmu_master_cfg *cfg = fwspec->iommu_priv;
struct arm_smmu_device *smmu = cfg->smmu;
struct arm_smmu_smr *smrs = smmu->smrs;
@ -1206,7 +1235,7 @@ static int arm_smmu_domain_add_master(struct arm_smmu_domain *smmu_domain,
static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
int ret;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct arm_smmu_device *smmu;
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
@ -1226,10 +1255,15 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
return -ENODEV;
smmu = fwspec_smmu(fwspec);
ret = arm_smmu_rpm_get(smmu);
if (ret < 0)
return ret;
/* Ensure that the domain is finalised */
ret = arm_smmu_init_domain_context(domain, smmu);
if (ret < 0)
return ret;
goto rpm_put;
/*
* Sanity check the domain. We don't support domains across
@ -1239,49 +1273,74 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
dev_err(dev,
"cannot attach to SMMU %s whilst already attached to domain on SMMU %s\n",
dev_name(smmu_domain->smmu->dev), dev_name(smmu->dev));
return -EINVAL;
ret = -EINVAL;
goto rpm_put;
}
/* Looks ok, so add the device to the domain */
return arm_smmu_domain_add_master(smmu_domain, fwspec);
ret = arm_smmu_domain_add_master(smmu_domain, fwspec);
rpm_put:
arm_smmu_rpm_put(smmu);
return ret;
}
static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
struct io_pgtable_ops *ops = to_smmu_domain(domain)->pgtbl_ops;
struct arm_smmu_device *smmu = to_smmu_domain(domain)->smmu;
int ret;
if (!ops)
return -ENODEV;
return ops->map(ops, iova, paddr, size, prot);
arm_smmu_rpm_get(smmu);
ret = ops->map(ops, iova, paddr, size, prot);
arm_smmu_rpm_put(smmu);
return ret;
}
static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t size)
{
struct io_pgtable_ops *ops = to_smmu_domain(domain)->pgtbl_ops;
struct arm_smmu_device *smmu = to_smmu_domain(domain)->smmu;
size_t ret;
if (!ops)
return 0;
return ops->unmap(ops, iova, size);
arm_smmu_rpm_get(smmu);
ret = ops->unmap(ops, iova, size);
arm_smmu_rpm_put(smmu);
return ret;
}
static void arm_smmu_flush_iotlb_all(struct iommu_domain *domain)
{
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu = smmu_domain->smmu;
if (smmu_domain->tlb_ops)
if (smmu_domain->tlb_ops) {
arm_smmu_rpm_get(smmu);
smmu_domain->tlb_ops->tlb_flush_all(smmu_domain);
arm_smmu_rpm_put(smmu);
}
}
static void arm_smmu_iotlb_sync(struct iommu_domain *domain)
{
struct arm_smmu_domain *smmu_domain = to_smmu_domain(domain);
struct arm_smmu_device *smmu = smmu_domain->smmu;
if (smmu_domain->tlb_ops)
if (smmu_domain->tlb_ops) {
arm_smmu_rpm_get(smmu);
smmu_domain->tlb_ops->tlb_sync(smmu_domain);
arm_smmu_rpm_put(smmu);
}
}
static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
@ -1296,6 +1355,11 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
u32 tmp;
u64 phys;
unsigned long va, flags;
int ret;
ret = arm_smmu_rpm_get(smmu);
if (ret < 0)
return 0;
cb_base = ARM_SMMU_CB(smmu, cfg->cbndx);
@ -1324,6 +1388,8 @@ static phys_addr_t arm_smmu_iova_to_phys_hard(struct iommu_domain *domain,
return 0;
}
arm_smmu_rpm_put(smmu);
return (phys & GENMASK_ULL(39, 12)) | (iova & 0xfff);
}
@ -1380,7 +1446,7 @@ static int arm_smmu_add_device(struct device *dev)
{
struct arm_smmu_device *smmu;
struct arm_smmu_master_cfg *cfg;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
int i, ret;
if (using_legacy_binding) {
@ -1391,7 +1457,7 @@ static int arm_smmu_add_device(struct device *dev)
* will allocate/initialise a new one. Thus we need to update fwspec for
* later use.
*/
fwspec = dev->iommu_fwspec;
fwspec = dev_iommu_fwspec_get(dev);
if (ret)
goto out_free;
} else if (fwspec && fwspec->ops == &arm_smmu_ops) {
@ -1428,12 +1494,21 @@ static int arm_smmu_add_device(struct device *dev)
while (i--)
cfg->smendx[i] = INVALID_SMENDX;
ret = arm_smmu_rpm_get(smmu);
if (ret < 0)
goto out_cfg_free;
ret = arm_smmu_master_alloc_smes(dev);
arm_smmu_rpm_put(smmu);
if (ret)
goto out_cfg_free;
iommu_device_link(&smmu->iommu, dev);
device_link_add(dev, smmu->dev,
DL_FLAG_PM_RUNTIME | DL_FLAG_AUTOREMOVE_SUPPLIER);
return 0;
out_cfg_free:
@ -1445,10 +1520,10 @@ out_free:
static void arm_smmu_remove_device(struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct arm_smmu_master_cfg *cfg;
struct arm_smmu_device *smmu;
int ret;
if (!fwspec || fwspec->ops != &arm_smmu_ops)
return;
@ -1456,8 +1531,15 @@ static void arm_smmu_remove_device(struct device *dev)
cfg = fwspec->iommu_priv;
smmu = cfg->smmu;
ret = arm_smmu_rpm_get(smmu);
if (ret < 0)
return;
iommu_device_unlink(&smmu->iommu, dev);
arm_smmu_master_free_smes(fwspec);
arm_smmu_rpm_put(smmu);
iommu_group_remove_device(dev);
kfree(fwspec->iommu_priv);
iommu_fwspec_free(dev);
@ -1465,7 +1547,7 @@ static void arm_smmu_remove_device(struct device *dev)
static struct iommu_group *arm_smmu_device_group(struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct arm_smmu_device *smmu = fwspec_smmu(fwspec);
struct iommu_group *group = NULL;
int i, idx;
@ -1947,13 +2029,14 @@ struct arm_smmu_match_data {
};
#define ARM_SMMU_MATCH_DATA(name, ver, imp) \
static struct arm_smmu_match_data name = { .version = ver, .model = imp }
static const struct arm_smmu_match_data name = { .version = ver, .model = imp }
ARM_SMMU_MATCH_DATA(smmu_generic_v1, ARM_SMMU_V1, GENERIC_SMMU);
ARM_SMMU_MATCH_DATA(smmu_generic_v2, ARM_SMMU_V2, GENERIC_SMMU);
ARM_SMMU_MATCH_DATA(arm_mmu401, ARM_SMMU_V1_64K, GENERIC_SMMU);
ARM_SMMU_MATCH_DATA(arm_mmu500, ARM_SMMU_V2, ARM_MMU500);
ARM_SMMU_MATCH_DATA(cavium_smmuv2, ARM_SMMU_V2, CAVIUM_SMMUV2);
ARM_SMMU_MATCH_DATA(qcom_smmuv2, ARM_SMMU_V2, QCOM_SMMUV2);
static const struct of_device_id arm_smmu_of_match[] = {
{ .compatible = "arm,smmu-v1", .data = &smmu_generic_v1 },
@ -1962,9 +2045,9 @@ static const struct of_device_id arm_smmu_of_match[] = {
{ .compatible = "arm,mmu-401", .data = &arm_mmu401 },
{ .compatible = "arm,mmu-500", .data = &arm_mmu500 },
{ .compatible = "cavium,smmu-v2", .data = &cavium_smmuv2 },
{ .compatible = "qcom,smmu-v2", .data = &qcom_smmuv2 },
{ },
};
MODULE_DEVICE_TABLE(of, arm_smmu_of_match);
#ifdef CONFIG_ACPI
static int acpi_smmu_get_data(u32 model, struct arm_smmu_device *smmu)
@ -2150,6 +2233,17 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
smmu->irqs[i] = irq;
}
err = devm_clk_bulk_get_all(dev, &smmu->clks);
if (err < 0) {
dev_err(dev, "failed to get clocks %d\n", err);
return err;
}
smmu->num_clks = err;
err = clk_bulk_prepare_enable(smmu->num_clks, smmu->clks);
if (err)
return err;
err = arm_smmu_device_cfg_probe(smmu);
if (err)
return err;
@ -2199,6 +2293,17 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
arm_smmu_device_reset(smmu);
arm_smmu_test_smr_masks(smmu);
/*
* We want to avoid touching dev->power.lock in fastpaths unless
* it's really going to do something useful - pm_runtime_enabled()
* can serve as an ideal proxy for that decision. So, conditionally
* enable pm_runtime.
*/
if (dev->pm_domain) {
pm_runtime_set_active(dev);
pm_runtime_enable(dev);
}
/*
* For ACPI and generic DT bindings, an SMMU will be probed before
* any device which might need it, so we want the bus ops in place
@ -2224,48 +2329,82 @@ static int arm_smmu_legacy_bus_init(void)
}
device_initcall_sync(arm_smmu_legacy_bus_init);
static int arm_smmu_device_remove(struct platform_device *pdev)
static void arm_smmu_device_shutdown(struct platform_device *pdev)
{
struct arm_smmu_device *smmu = platform_get_drvdata(pdev);
if (!smmu)
return -ENODEV;
return;
if (!bitmap_empty(smmu->context_map, ARM_SMMU_MAX_CBS))
dev_err(&pdev->dev, "removing device with active domains!\n");
arm_smmu_rpm_get(smmu);
/* Turn the thing off */
writel(sCR0_CLIENTPD, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
arm_smmu_rpm_put(smmu);
if (pm_runtime_enabled(smmu->dev))
pm_runtime_force_suspend(smmu->dev);
else
clk_bulk_disable(smmu->num_clks, smmu->clks);
clk_bulk_unprepare(smmu->num_clks, smmu->clks);
}
static int __maybe_unused arm_smmu_runtime_resume(struct device *dev)
{
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
int ret;
ret = clk_bulk_enable(smmu->num_clks, smmu->clks);
if (ret)
return ret;
arm_smmu_device_reset(smmu);
return 0;
}
static void arm_smmu_device_shutdown(struct platform_device *pdev)
static int __maybe_unused arm_smmu_runtime_suspend(struct device *dev)
{
arm_smmu_device_remove(pdev);
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
clk_bulk_disable(smmu->num_clks, smmu->clks);
return 0;
}
static int __maybe_unused arm_smmu_pm_resume(struct device *dev)
{
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
arm_smmu_device_reset(smmu);
if (pm_runtime_suspended(dev))
return 0;
return arm_smmu_runtime_resume(dev);
}
static SIMPLE_DEV_PM_OPS(arm_smmu_pm_ops, NULL, arm_smmu_pm_resume);
static int __maybe_unused arm_smmu_pm_suspend(struct device *dev)
{
if (pm_runtime_suspended(dev))
return 0;
return arm_smmu_runtime_suspend(dev);
}
static const struct dev_pm_ops arm_smmu_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(arm_smmu_pm_suspend, arm_smmu_pm_resume)
SET_RUNTIME_PM_OPS(arm_smmu_runtime_suspend,
arm_smmu_runtime_resume, NULL)
};
static struct platform_driver arm_smmu_driver = {
.driver = {
.name = "arm-smmu",
.of_match_table = of_match_ptr(arm_smmu_of_match),
.pm = &arm_smmu_pm_ops,
.suppress_bind_attrs = true,
},
.probe = arm_smmu_device_probe,
.remove = arm_smmu_device_remove,
.shutdown = arm_smmu_device_shutdown,
};
module_platform_driver(arm_smmu_driver);
MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations");
MODULE_AUTHOR("Will Deacon <will.deacon@arm.com>");
MODULE_LICENSE("GPL v2");
builtin_platform_driver(arm_smmu_driver);

22
drivers/iommu/dma-iommu.c
View File

@ -175,7 +175,7 @@ EXPORT_SYMBOL(iommu_put_dma_cookie);
void iommu_dma_get_resv_regions(struct device *dev, struct list_head *list)
{
if (!is_of_node(dev->iommu_fwspec->iommu_fwnode))
if (!is_of_node(dev_iommu_fwspec_get(dev)->iommu_fwnode))
iort_iommu_msi_get_resv_regions(dev, list);
}
@ -447,20 +447,17 @@ static void __iommu_dma_free_pages(struct page **pages, int count)
kvfree(pages);
}
static struct page **__iommu_dma_alloc_pages(unsigned int count,
unsigned long order_mask, gfp_t gfp)
static struct page **__iommu_dma_alloc_pages(struct device *dev,
unsigned int count, unsigned long order_mask, gfp_t gfp)
{
struct page **pages;
unsigned int i = 0, array_size = count * sizeof(*pages);
unsigned int i = 0, nid = dev_to_node(dev);
order_mask &= (2U << MAX_ORDER) - 1;
if (!order_mask)
return NULL;
if (array_size <= PAGE_SIZE)
pages = kzalloc(array_size, GFP_KERNEL);
else
pages = vzalloc(array_size);
pages = kvzalloc(count * sizeof(*pages), GFP_KERNEL);
if (!pages)
return NULL;
@ -479,10 +476,12 @@ static struct page **__iommu_dma_alloc_pages(unsigned int count,
for (order_mask &= (2U << __fls(count)) - 1;
order_mask; order_mask &= ~order_size) {
unsigned int order = __fls(order_mask);
gfp_t alloc_flags = gfp;
order_size = 1U << order;
page = alloc_pages((order_mask - order_size) ?
gfp | __GFP_NORETRY : gfp, order);
if (order_mask > order_size)
alloc_flags |= __GFP_NORETRY;
page = alloc_pages_node(nid, alloc_flags, order);
if (!page)
continue;
if (!order)
@ -567,7 +566,8 @@ struct page **iommu_dma_alloc(struct device *dev, size_t size, gfp_t gfp,
alloc_sizes = min_size;
count = PAGE_ALIGN(size) >> PAGE_SHIFT;
pages = __iommu_dma_alloc_pages(count, alloc_sizes >> PAGE_SHIFT, gfp);
pages = __iommu_dma_alloc_pages(dev, count, alloc_sizes >> PAGE_SHIFT,
gfp);
if (!pages)
return NULL;

91
drivers/iommu/dmar.c
View File

@ -1160,6 +1160,7 @@ static int qi_check_fault(struct intel_iommu *iommu, int index)
int head, tail;
struct q_inval *qi = iommu->qi;
int wait_index = (index + 1) % QI_LENGTH;
int shift = qi_shift(iommu);
if (qi->desc_status[wait_index] == QI_ABORT)
return -EAGAIN;
@ -1173,13 +1174,19 @@ static int qi_check_fault(struct intel_iommu *iommu, int index)
*/
if (fault & DMA_FSTS_IQE) {
head = readl(iommu->reg + DMAR_IQH_REG);
if ((head >> DMAR_IQ_SHIFT) == index) {
pr_err("VT-d detected invalid descriptor: "
"low=%llx, high=%llx\n",
(unsigned long long)qi->desc[index].low,
(unsigned long long)qi->desc[index].high);
memcpy(&qi->desc[index], &qi->desc[wait_index],
sizeof(struct qi_desc));
if ((head >> shift) == index) {
struct qi_desc *desc = qi->desc + head;
/*
* desc->qw2 and desc->qw3 are either reserved or
* used by software as private data. We won't print
* out these two qw's for security consideration.
*/
pr_err("VT-d detected invalid descriptor: qw0 = %llx, qw1 = %llx\n",
(unsigned long long)desc->qw0,
(unsigned long long)desc->qw1);
memcpy(desc, qi->desc + (wait_index << shift),
1 << shift);
writel(DMA_FSTS_IQE, iommu->reg + DMAR_FSTS_REG);
return -EINVAL;
}
@ -1191,10 +1198,10 @@ static int qi_check_fault(struct intel_iommu *iommu, int index)
*/
if (fault & DMA_FSTS_ITE) {
head = readl(iommu->reg + DMAR_IQH_REG);
head = ((head >> DMAR_IQ_SHIFT) - 1 + QI_LENGTH) % QI_LENGTH;
head = ((head >> shift) - 1 + QI_LENGTH) % QI_LENGTH;
head |= 1;
tail = readl(iommu->reg + DMAR_IQT_REG);
tail = ((tail >> DMAR_IQ_SHIFT) - 1 + QI_LENGTH) % QI_LENGTH;
tail = ((tail >> shift) - 1 + QI_LENGTH) % QI_LENGTH;
writel(DMA_FSTS_ITE, iommu->reg + DMAR_FSTS_REG);
@ -1222,15 +1229,14 @@ int qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu)
{
int rc;
struct q_inval *qi = iommu->qi;
struct qi_desc *hw, wait_desc;
int offset, shift, length;
struct qi_desc wait_desc;
int wait_index, index;
unsigned long flags;
if (!qi)
return 0;
hw = qi->desc;
restart:
rc = 0;
@ -1243,16 +1249,21 @@ restart:
index = qi->free_head;
wait_index = (index + 1) % QI_LENGTH;
shift = qi_shift(iommu);
length = 1 << shift;
qi->desc_status[index] = qi->desc_status[wait_index] = QI_IN_USE;
hw[index] = *desc;
wait_desc.low = QI_IWD_STATUS_DATA(QI_DONE) |
offset = index << shift;
memcpy(qi->desc + offset, desc, length);
wait_desc.qw0 = QI_IWD_STATUS_DATA(QI_DONE) |
QI_IWD_STATUS_WRITE | QI_IWD_TYPE;
wait_desc.high = virt_to_phys(&qi->desc_status[wait_index]);
wait_desc.qw1 = virt_to_phys(&qi->desc_status[wait_index]);
wait_desc.qw2 = 0;
wait_desc.qw3 = 0;
hw[wait_index] = wait_desc;
offset = wait_index << shift;
memcpy(qi->desc + offset, &wait_desc, length);
qi->free_head = (qi->free_head + 2) % QI_LENGTH;
qi->free_cnt -= 2;
@ -1261,7 +1272,7 @@ restart:
* update the HW tail register indicating the presence of
* new descriptors.
*/
writel(qi->free_head << DMAR_IQ_SHIFT, iommu->reg + DMAR_IQT_REG);
writel(qi->free_head << shift, iommu->reg + DMAR_IQT_REG);
while (qi->desc_status[wait_index] != QI_DONE) {
/*
@ -1298,8 +1309,10 @@ void qi_global_iec(struct intel_iommu *iommu)
{
struct qi_desc desc;
desc.low = QI_IEC_TYPE;
desc.high = 0;
desc.qw0 = QI_IEC_TYPE;
desc.qw1 = 0;
desc.qw2 = 0;
desc.qw3 = 0;
/* should never fail */
qi_submit_sync(&desc, iommu);
@ -1310,9 +1323,11 @@ void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid, u8 fm,
{
struct qi_desc desc;
desc.low = QI_CC_FM(fm) | QI_CC_SID(sid) | QI_CC_DID(did)
desc.qw0 = QI_CC_FM(fm) | QI_CC_SID(sid) | QI_CC_DID(did)
| QI_CC_GRAN(type) | QI_CC_TYPE;
desc.high = 0;
desc.qw1 = 0;
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(&desc, iommu);
}
@ -1331,10 +1346,12 @@ void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
if (cap_read_drain(iommu->cap))
dr = 1;
desc.low = QI_IOTLB_DID(did) | QI_IOTLB_DR(dr) | QI_IOTLB_DW(dw)
desc.qw0 = QI_IOTLB_DID(did) | QI_IOTLB_DR(dr) | QI_IOTLB_DW(dw)
| QI_IOTLB_GRAN(type) | QI_IOTLB_TYPE;
desc.high = QI_IOTLB_ADDR(addr) | QI_IOTLB_IH(ih)
desc.qw1 = QI_IOTLB_ADDR(addr) | QI_IOTLB_IH(ih)
| QI_IOTLB_AM(size_order);
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(&desc, iommu);
}
@ -1347,15 +1364,17 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
if (mask) {
WARN_ON_ONCE(addr & ((1ULL << (VTD_PAGE_SHIFT + mask)) - 1));
addr |= (1ULL << (VTD_PAGE_SHIFT + mask - 1)) - 1;
desc.high = QI_DEV_IOTLB_ADDR(addr) | QI_DEV_IOTLB_SIZE;
desc.qw1 = QI_DEV_IOTLB_ADDR(addr) | QI_DEV_IOTLB_SIZE;
} else
desc.high = QI_DEV_IOTLB_ADDR(addr);
desc.qw1 = QI_DEV_IOTLB_ADDR(addr);
if (qdep >= QI_DEV_IOTLB_MAX_INVS)
qdep = 0;
desc.low = QI_DEV_IOTLB_SID(sid) | QI_DEV_IOTLB_QDEP(qdep) |
desc.qw0 = QI_DEV_IOTLB_SID(sid) | QI_DEV_IOTLB_QDEP(qdep) |
QI_DIOTLB_TYPE | QI_DEV_IOTLB_PFSID(pfsid);
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(&desc, iommu);
}
@ -1403,16 +1422,24 @@ static void __dmar_enable_qi(struct intel_iommu *iommu)
u32 sts;
unsigned long flags;
struct q_inval *qi = iommu->qi;
u64 val = virt_to_phys(qi->desc);
qi->free_head = qi->free_tail = 0;
qi->free_cnt = QI_LENGTH;
/*
* Set DW=1 and QS=1 in IQA_REG when Scalable Mode capability
* is present.
*/
if (ecap_smts(iommu->ecap))
val |= (1 << 11) | 1;
raw_spin_lock_irqsave(&iommu->register_lock, flags);
/* write zero to the tail reg */
writel(0, iommu->reg + DMAR_IQT_REG);
dmar_writeq(iommu->reg + DMAR_IQA_REG, virt_to_phys(qi->desc));
dmar_writeq(iommu->reg + DMAR_IQA_REG, val);
iommu->gcmd |= DMA_GCMD_QIE;
writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG);
@ -1448,8 +1475,12 @@ int dmar_enable_qi(struct intel_iommu *iommu)
qi = iommu->qi;
desc_page = alloc_pages_node(iommu->node, GFP_ATOMIC | __GFP_ZERO, 0);
/*
* Need two pages to accommodate 256 descriptors of 256 bits each
* if the remapping hardware supports scalable mode translation.
*/
desc_page = alloc_pages_node(iommu->node, GFP_ATOMIC | __GFP_ZERO,
!!ecap_smts(iommu->ecap));
if (!desc_page) {
kfree(qi);
iommu->qi = NULL;

311
drivers/iommu/intel-iommu.c
View File

@ -291,49 +291,6 @@ static inline void context_clear_entry(struct context_entry *context)
context->hi = 0;
}
/*
* 0: readable
* 1: writable
* 2-6: reserved
* 7: super page
* 8-10: available
* 11: snoop behavior
* 12-63: Host physcial address
*/
struct dma_pte {
u64 val;
};
static inline void dma_clear_pte(struct dma_pte *pte)
{
pte->val = 0;
}
static inline u64 dma_pte_addr(struct dma_pte *pte)
{
#ifdef CONFIG_64BIT
return pte->val & VTD_PAGE_MASK;
#else
/* Must have a full atomic 64-bit read */
return __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK;
#endif
}
static inline bool dma_pte_present(struct dma_pte *pte)
{
return (pte->val & 3) != 0;
}
static inline bool dma_pte_superpage(struct dma_pte *pte)
{
return (pte->val & DMA_PTE_LARGE_PAGE);
}
static inline int first_pte_in_page(struct dma_pte *pte)
{
return !((unsigned long)pte & ~VTD_PAGE_MASK);
}
/*
* This domain is a statically identity mapping domain.
* 1. This domain creats a static 1:1 mapping to all usable memory.
@ -406,38 +363,16 @@ static int dmar_map_gfx = 1;
static int dmar_forcedac;
static int intel_iommu_strict;
static int intel_iommu_superpage = 1;
static int intel_iommu_ecs = 1;
static int intel_iommu_pasid28;
static int intel_iommu_sm = 1;
static int iommu_identity_mapping;
#define IDENTMAP_ALL 1
#define IDENTMAP_GFX 2
#define IDENTMAP_AZALIA 4
/* Broadwell and Skylake have broken ECS support — normal so-called "second
* level" translation of DMA requests-without-PASID doesn't actually happen
* unless you also set the NESTE bit in an extended context-entry. Which of
* course means that SVM doesn't work because it's trying to do nested
* translation of the physical addresses it finds in the process page tables,
* through the IOVA->phys mapping found in the "second level" page tables.
*
* The VT-d specification was retroactively changed to change the definition
* of the capability bits and pretend that Broadwell/Skylake never happened...
* but unfortunately the wrong bit was changed. It's ECS which is broken, but
* for some reason it was the PASID capability bit which was redefined (from
* bit 28 on BDW/SKL to bit 40 in future).
*
* So our test for ECS needs to eschew those implementations which set the old
* PASID capabiity bit 28, since those are the ones on which ECS is broken.
* Unless we are working around the 'pasid28' limitations, that is, by putting
* the device into passthrough mode for normal DMA and thus masking the bug.
*/
#define ecs_enabled(iommu) (intel_iommu_ecs && ecap_ecs(iommu->ecap) && \
(intel_iommu_pasid28 || !ecap_broken_pasid(iommu->ecap)))
/* PASID support is thus enabled if ECS is enabled and *either* of the old
* or new capability bits are set. */
#define pasid_enabled(iommu) (ecs_enabled(iommu) && \
(ecap_pasid(iommu->ecap) || ecap_broken_pasid(iommu->ecap)))
#define sm_supported(iommu) (intel_iommu_sm && ecap_smts((iommu)->ecap))
#define pasid_supported(iommu) (sm_supported(iommu) && \
ecap_pasid((iommu)->ecap))
int intel_iommu_gfx_mapped;
EXPORT_SYMBOL_GPL(intel_iommu_gfx_mapped);
@ -448,21 +383,24 @@ static LIST_HEAD(device_domain_list);
/*
* Iterate over elements in device_domain_list and call the specified
* callback @fn against each element. This helper should only be used
* in the context where the device_domain_lock has already been holden.
* callback @fn against each element.
*/
int for_each_device_domain(int (*fn)(struct device_domain_info *info,
void *data), void *data)
{
int ret = 0;
unsigned long flags;
struct device_domain_info *info;
assert_spin_locked(&device_domain_lock);
spin_lock_irqsave(&device_domain_lock, flags);
list_for_each_entry(info, &device_domain_list, global) {
ret = fn(info, data);
if (ret)
if (ret) {
spin_unlock_irqrestore(&device_domain_lock, flags);
return ret;
}
}
spin_unlock_irqrestore(&device_domain_lock, flags);
return 0;
}
@ -518,15 +456,9 @@ static int __init intel_iommu_setup(char *str)
} else if (!strncmp(str, "sp_off", 6)) {
pr_info("Disable supported super page\n");
intel_iommu_superpage = 0;
} else if (!strncmp(str, "ecs_off", 7)) {
printk(KERN_INFO
"Intel-IOMMU: disable extended context table support\n");
intel_iommu_ecs = 0;
} else if (!strncmp(str, "pasid28", 7)) {
printk(KERN_INFO
"Intel-IOMMU: enable pre-production PASID support\n");
intel_iommu_pasid28 = 1;
iommu_identity_mapping |= IDENTMAP_GFX;
} else if (!strncmp(str, "sm_off", 6)) {
pr_info("Intel-IOMMU: disable scalable mode support\n");
intel_iommu_sm = 0;
} else if (!strncmp(str, "tboot_noforce", 13)) {
printk(KERN_INFO
"Intel-IOMMU: not forcing on after tboot. This could expose security risk for tboot\n");
@ -773,7 +705,7 @@ struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
u64 *entry;
entry = &root->lo;
if (ecs_enabled(iommu)) {
if (sm_supported(iommu)) {
if (devfn >= 0x80) {
devfn -= 0x80;
entry = &root->hi;
@ -915,7 +847,7 @@ static void free_context_table(struct intel_iommu *iommu)
if (context)
free_pgtable_page(context);
if (!ecs_enabled(iommu))
if (!sm_supported(iommu))
continue;
context = iommu_context_addr(iommu, i, 0x80, 0);
@ -1267,8 +1199,8 @@ static void iommu_set_root_entry(struct intel_iommu *iommu)
unsigned long flag;
addr = virt_to_phys(iommu->root_entry);
if (ecs_enabled(iommu))
addr |= DMA_RTADDR_RTT;
if (sm_supported(iommu))
addr |= DMA_RTADDR_SMT;
raw_spin_lock_irqsave(&iommu->register_lock, flag);
dmar_writeq(iommu->reg + DMAR_RTADDR_REG, addr);
@ -1282,7 +1214,7 @@ static void iommu_set_root_entry(struct intel_iommu *iommu)
raw_spin_unlock_irqrestore(&iommu->register_lock, flag);
}
static void iommu_flush_write_buffer(struct intel_iommu *iommu)
void iommu_flush_write_buffer(struct intel_iommu *iommu)
{
u32 val;
unsigned long flag;
@ -1694,6 +1626,16 @@ static int iommu_init_domains(struct intel_iommu *iommu)
*/
set_bit(0, iommu->domain_ids);
/*
* Vt-d spec rev3.0 (section 6.2.3.1) requires that each pasid
* entry for first-level or pass-through translation modes should
* be programmed with a domain id different from those used for
* second-level or nested translation. We reserve a domain id for
* this purpose.
*/
if (sm_supported(iommu))
set_bit(FLPT_DEFAULT_DID, iommu->domain_ids);
return 0;
}
@ -1758,10 +1700,9 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
free_context_table(iommu);
#ifdef CONFIG_INTEL_IOMMU_SVM
if (pasid_enabled(iommu)) {
if (pasid_supported(iommu)) {
if (ecap_prs(iommu->ecap))
intel_svm_finish_prq(iommu);
intel_svm_exit(iommu);
}
#endif
}
@ -1981,8 +1922,59 @@ static void domain_exit(struct dmar_domain *domain)
free_domain_mem(domain);
}
/*
* Get the PASID directory size for scalable mode context entry.
* Value of X in the PDTS field of a scalable mode context entry
* indicates PASID directory with 2^(X + 7) entries.
*/
static inline unsigned long context_get_sm_pds(struct pasid_table *table)
{
int pds, max_pde;
max_pde = table->max_pasid >> PASID_PDE_SHIFT;
pds = find_first_bit((unsigned long *)&max_pde, MAX_NR_PASID_BITS);
if (pds < 7)
return 0;
return pds - 7;
}
/*
* Set the RID_PASID field of a scalable mode context entry. The
* IOMMU hardware will use the PASID value set in this field for
* DMA translations of DMA requests without PASID.
*/
static inline void
context_set_sm_rid2pasid(struct context_entry *context, unsigned long pasid)
{
context->hi |= pasid & ((1 << 20) - 1);
context->hi |= (1 << 20);
}
/*
* Set the DTE(Device-TLB Enable) field of a scalable mode context
* entry.
*/
static inline void context_set_sm_dte(struct context_entry *context)
{
context->lo |= (1 << 2);
}
/*
* Set the PRE(Page Request Enable) field of a scalable mode context
* entry.
*/
static inline void context_set_sm_pre(struct context_entry *context)
{
context->lo |= (1 << 4);
}
/* Convert value to context PASID directory size field coding. */
#define context_pdts(pds) (((pds) & 0x7) << 9)
static int domain_context_mapping_one(struct dmar_domain *domain,
struct intel_iommu *iommu,
struct pasid_table *table,
u8 bus, u8 devfn)
{
u16 did = domain->iommu_did[iommu->seq_id];
@ -1990,8 +1982,7 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
struct device_domain_info *info = NULL;
struct context_entry *context;
unsigned long flags;
struct dma_pte *pgd;
int ret, agaw;
int ret;
WARN_ON(did == 0);
@ -2037,17 +2028,43 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
}
}
pgd = domain->pgd;
context_clear_entry(context);
context_set_domain_id(context, did);
if (sm_supported(iommu)) {
unsigned long pds;
WARN_ON(!table);
/* Setup the PASID DIR pointer: */
pds = context_get_sm_pds(table);
context->lo = (u64)virt_to_phys(table->table) |
context_pdts(pds);
/* Setup the RID_PASID field: */
context_set_sm_rid2pasid(context, PASID_RID2PASID);
/*
* Skip top levels of page tables for iommu which has less agaw
* than default. Unnecessary for PT mode.
* Setup the Device-TLB enable bit and Page request
* Enable bit:
*/
info = iommu_support_dev_iotlb(domain, iommu, bus, devfn);
if (info && info->ats_supported)
context_set_sm_dte(context);
if (info && info->pri_supported)
context_set_sm_pre(context);
} else {
struct dma_pte *pgd = domain->pgd;
int agaw;
context_set_domain_id(context, did);
context_set_translation_type(context, translation);
if (translation != CONTEXT_TT_PASS_THROUGH) {
for (agaw = domain->agaw; agaw != iommu->agaw; agaw--) {
/*
* Skip top levels of page tables for iommu which has
* less agaw than default. Unnecessary for PT mode.
*/
for (agaw = domain->agaw; agaw > iommu->agaw; agaw--) {
ret = -ENOMEM;
pgd = phys_to_virt(dma_pte_addr(pgd));
if (!dma_pte_present(pgd))
@ -2061,7 +2078,7 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
translation = CONTEXT_TT_MULTI_LEVEL;
context_set_address_root(context, virt_to_phys(pgd));
context_set_address_width(context, iommu->agaw);
context_set_address_width(context, agaw);
} else {
/*
* In pass through mode, AW must be programmed to
@ -2070,8 +2087,8 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
*/
context_set_address_width(context, iommu->msagaw);
}
}
context_set_translation_type(context, translation);
context_set_fault_enable(context);
context_set_present(context);
domain_flush_cache(domain, context, sizeof(*context));
@ -2105,6 +2122,7 @@ out_unlock:
struct domain_context_mapping_data {
struct dmar_domain *domain;
struct intel_iommu *iommu;
struct pasid_table *table;
};
static int domain_context_mapping_cb(struct pci_dev *pdev,
@ -2113,25 +2131,31 @@ static int domain_context_mapping_cb(struct pci_dev *pdev,
struct domain_context_mapping_data *data = opaque;
return domain_context_mapping_one(data->domain, data->iommu,
PCI_BUS_NUM(alias), alias & 0xff);
data->table, PCI_BUS_NUM(alias),
alias & 0xff);
}
static int
domain_context_mapping(struct dmar_domain *domain, struct device *dev)
{
struct domain_context_mapping_data data;
struct pasid_table *table;
struct intel_iommu *iommu;
u8 bus, devfn;
struct domain_context_mapping_data data;
iommu = device_to_iommu(dev, &bus, &devfn);
if (!iommu)
return -ENODEV;
table = intel_pasid_get_table(dev);
if (!dev_is_pci(dev))
return domain_context_mapping_one(domain, iommu, bus, devfn);
return domain_context_mapping_one(domain, iommu, table,
bus, devfn);
data.domain = domain;
data.iommu = iommu;
data.table = table;
return pci_for_each_dma_alias(to_pci_dev(dev),
&domain_context_mapping_cb, &data);
@ -2467,8 +2491,8 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
dmar_find_matched_atsr_unit(pdev))
info->ats_supported = 1;
if (ecs_enabled(iommu)) {
if (pasid_enabled(iommu)) {
if (sm_supported(iommu)) {
if (pasid_supported(iommu)) {
int features = pci_pasid_features(pdev);
if (features >= 0)
info->pasid_supported = features | 1;
@ -2514,16 +2538,34 @@ static struct dmar_domain *dmar_insert_one_dev_info(struct intel_iommu *iommu,
list_add(&info->global, &device_domain_list);
if (dev)
dev->archdata.iommu = info;
spin_unlock_irqrestore(&device_domain_lock, flags);
if (dev && dev_is_pci(dev) && info->pasid_supported) {
/* PASID table is mandatory for a PCI device in scalable mode. */
if (dev && dev_is_pci(dev) && sm_supported(iommu)) {
ret = intel_pasid_alloc_table(dev);
if (ret) {
pr_warn("No pasid table for %s, pasid disabled\n",
pr_err("PASID table allocation for %s failed\n",
dev_name(dev));
info->pasid_supported = 0;
dmar_remove_one_dev_info(domain, dev);
return NULL;
}
/* Setup the PASID entry for requests without PASID: */
spin_lock(&iommu->lock);
if (hw_pass_through && domain_type_is_si(domain))
ret = intel_pasid_setup_pass_through(iommu, domain,
dev, PASID_RID2PASID);
else
ret = intel_pasid_setup_second_level(iommu, domain,
dev, PASID_RID2PASID);
spin_unlock(&iommu->lock);
if (ret) {
pr_err("Setup RID2PASID for %s failed\n",
dev_name(dev));
dmar_remove_one_dev_info(domain, dev);
return NULL;
}
}
spin_unlock_irqrestore(&device_domain_lock, flags);
if (dev && domain_context_mapping(domain, dev)) {
pr_err("Domain context map for %s failed\n", dev_name(dev));
@ -3287,7 +3329,7 @@ static int __init init_dmars(void)
* We need to ensure the system pasid table is no bigger
* than the smallest supported.
*/
if (pasid_enabled(iommu)) {
if (pasid_supported(iommu)) {
u32 temp = 2 << ecap_pss(iommu->ecap);
intel_pasid_max_id = min_t(u32, temp,
@ -3348,7 +3390,7 @@ static int __init init_dmars(void)
if (!ecap_pass_through(iommu->ecap))
hw_pass_through = 0;
#ifdef CONFIG_INTEL_IOMMU_SVM
if (pasid_enabled(iommu))
if (pasid_supported(iommu))
intel_svm_init(iommu);
#endif
}
@ -3452,7 +3494,7 @@ domains_done:
iommu_flush_write_buffer(iommu);
#ifdef CONFIG_INTEL_IOMMU_SVM
if (pasid_enabled(iommu) && ecap_prs(iommu->ecap)) {
if (pasid_supported(iommu) && ecap_prs(iommu->ecap)) {
ret = intel_svm_enable_prq(iommu);
if (ret)
goto free_iommu;
@ -4335,7 +4377,7 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
goto out;
#ifdef CONFIG_INTEL_IOMMU_SVM
if (pasid_enabled(iommu))
if (pasid_supported(iommu))
intel_svm_init(iommu);
#endif
@ -4352,7 +4394,7 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
iommu_flush_write_buffer(iommu);
#ifdef CONFIG_INTEL_IOMMU_SVM
if (pasid_enabled(iommu) && ecap_prs(iommu->ecap)) {
if (pasid_supported(iommu) && ecap_prs(iommu->ecap)) {
ret = intel_svm_enable_prq(iommu);
if (ret)
goto disable_iommu;
@ -4927,6 +4969,10 @@ static void __dmar_remove_one_dev_info(struct device_domain_info *info)
iommu = info->iommu;
if (info->dev) {
if (dev_is_pci(info->dev) && sm_supported(iommu))
intel_pasid_tear_down_entry(iommu, info->dev,
PASID_RID2PASID);
iommu_disable_dev_iotlb(info);
domain_context_clear(iommu, info->dev);
intel_pasid_free_table(info->dev);
@ -5254,19 +5300,6 @@ static void intel_iommu_put_resv_regions(struct device *dev,
}
#ifdef CONFIG_INTEL_IOMMU_SVM
#define MAX_NR_PASID_BITS (20)
static inline unsigned long intel_iommu_get_pts(struct device *dev)
{
int pts, max_pasid;
max_pasid = intel_pasid_get_dev_max_id(dev);
pts = find_first_bit((unsigned long *)&max_pasid, MAX_NR_PASID_BITS);
if (pts < 5)
return 0;
return pts - 5;
}
int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev)
{
struct device_domain_info *info;
@ -5298,33 +5331,7 @@ int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sd
sdev->sid = PCI_DEVID(info->bus, info->devfn);
if (!(ctx_lo & CONTEXT_PASIDE)) {
if (iommu->pasid_state_table)
context[1].hi = (u64)virt_to_phys(iommu->pasid_state_table);
context[1].lo = (u64)virt_to_phys(info->pasid_table->table) |
intel_iommu_get_pts(sdev->dev);
wmb();
/* CONTEXT_TT_MULTI_LEVEL and CONTEXT_TT_DEV_IOTLB are both
* extended to permit requests-with-PASID if the PASIDE bit
* is set. which makes sense. For CONTEXT_TT_PASS_THROUGH,
* however, the PASIDE bit is ignored and requests-with-PASID
* are unconditionally blocked. Which makes less sense.
* So convert from CONTEXT_TT_PASS_THROUGH to one of the new
* "guest mode" translation types depending on whether ATS
* is available or not. Annoyingly, we can't use the new
* modes *unless* PASIDE is set. */
if ((ctx_lo & CONTEXT_TT_MASK) == (CONTEXT_TT_PASS_THROUGH << 2)) {
ctx_lo &= ~CONTEXT_TT_MASK;
if (info->ats_supported)
ctx_lo |= CONTEXT_TT_PT_PASID_DEV_IOTLB << 2;
else
ctx_lo |= CONTEXT_TT_PT_PASID << 2;
}
ctx_lo |= CONTEXT_PASIDE;
if (iommu->pasid_state_table)
ctx_lo |= CONTEXT_DINVE;
if (info->pri_supported)
ctx_lo |= CONTEXT_PRS;
context[0].lo = ctx_lo;
wmb();
iommu->flush.flush_context(iommu, sdev->did, sdev->sid,

449
drivers/iommu/intel-pasid.c
View File

@ -9,6 +9,8 @@
#define pr_fmt(fmt) "DMAR: " fmt
#include <linux/bitops.h>
#include <linux/cpufeature.h>
#include <linux/dmar.h>
#include <linux/intel-iommu.h>
#include <linux/iommu.h>
@ -123,12 +125,13 @@ int intel_pasid_alloc_table(struct device *dev)
struct pasid_table *pasid_table;
struct pasid_table_opaque data;
struct page *pages;
size_t size, count;
int max_pasid = 0;
int ret, order;
int size;
might_sleep();
info = dev->archdata.iommu;
if (WARN_ON(!info || !dev_is_pci(dev) ||
!info->pasid_supported || info->pasid_table))
if (WARN_ON(!info || !dev_is_pci(dev) || info->pasid_table))
return -EINVAL;
/* DMA alias device already has a pasid table, use it: */
@ -138,23 +141,25 @@ int intel_pasid_alloc_table(struct device *dev)
if (ret)
goto attach_out;
pasid_table = kzalloc(sizeof(*pasid_table), GFP_ATOMIC);
pasid_table = kzalloc(sizeof(*pasid_table), GFP_KERNEL);
if (!pasid_table)
return -ENOMEM;
INIT_LIST_HEAD(&pasid_table->dev);
size = sizeof(struct pasid_entry);
count = min_t(int, pci_max_pasids(to_pci_dev(dev)), intel_pasid_max_id);
order = get_order(size * count);
if (info->pasid_supported)
max_pasid = min_t(int, pci_max_pasids(to_pci_dev(dev)),
intel_pasid_max_id);
size = max_pasid >> (PASID_PDE_SHIFT - 3);
order = size ? get_order(size) : 0;
pages = alloc_pages_node(info->iommu->node,
GFP_ATOMIC | __GFP_ZERO,
order);
GFP_KERNEL | __GFP_ZERO, order);
if (!pages)
return -ENOMEM;
pasid_table->table = page_address(pages);
pasid_table->order = order;
pasid_table->max_pasid = count;
pasid_table->max_pasid = 1 << (order + PAGE_SHIFT + 3);
attach_out:
device_attach_pasid_table(info, pasid_table);
@ -162,14 +167,33 @@ attach_out:
return 0;
}
/* Get PRESENT bit of a PASID directory entry. */
static inline bool
pasid_pde_is_present(struct pasid_dir_entry *pde)
{
return READ_ONCE(pde->val) & PASID_PTE_PRESENT;
}
/* Get PASID table from a PASID directory entry. */
static inline struct pasid_entry *
get_pasid_table_from_pde(struct pasid_dir_entry *pde)
{
if (!pasid_pde_is_present(pde))
return NULL;
return phys_to_virt(READ_ONCE(pde->val) & PDE_PFN_MASK);
}
void intel_pasid_free_table(struct device *dev)
{
struct device_domain_info *info;
struct pasid_table *pasid_table;
struct pasid_dir_entry *dir;
struct pasid_entry *table;
int i, max_pde;
info = dev->archdata.iommu;
if (!info || !dev_is_pci(dev) ||
!info->pasid_supported || !info->pasid_table)
if (!info || !dev_is_pci(dev) || !info->pasid_table)
return;
pasid_table = info->pasid_table;
@ -178,6 +202,14 @@ void intel_pasid_free_table(struct device *dev)
if (!list_empty(&pasid_table->dev))
return;
/* Free scalable mode PASID directory tables: */
dir = pasid_table->table;
max_pde = pasid_table->max_pasid >> PASID_PDE_SHIFT;
for (i = 0; i < max_pde; i++) {
table = get_pasid_table_from_pde(&dir[i]);
free_pgtable_page(table);
}
free_pages((unsigned long)pasid_table->table, pasid_table->order);
kfree(pasid_table);
}
@ -206,17 +238,37 @@ int intel_pasid_get_dev_max_id(struct device *dev)
struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid)
{
struct device_domain_info *info;
struct pasid_table *pasid_table;
struct pasid_dir_entry *dir;
struct pasid_entry *entries;
int dir_index, index;
pasid_table = intel_pasid_get_table(dev);
if (WARN_ON(!pasid_table || pasid < 0 ||
pasid >= intel_pasid_get_dev_max_id(dev)))
return NULL;
entries = pasid_table->table;
dir = pasid_table->table;
info = dev->archdata.iommu;
dir_index = pasid >> PASID_PDE_SHIFT;
index = pasid & PASID_PTE_MASK;
return &entries[pasid];
spin_lock(&pasid_lock);
entries = get_pasid_table_from_pde(&dir[dir_index]);
if (!entries) {
entries = alloc_pgtable_page(info->iommu->node);
if (!entries) {
spin_unlock(&pasid_lock);
return NULL;
}
WRITE_ONCE(dir[dir_index].val,
(u64)virt_to_phys(entries) | PASID_PTE_PRESENT);
}
spin_unlock(&pasid_lock);
return &entries[index];
}
/*
@ -224,10 +276,17 @@ struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid)
*/
static inline void pasid_clear_entry(struct pasid_entry *pe)
{
WRITE_ONCE(pe->val, 0);
WRITE_ONCE(pe->val[0], 0);
WRITE_ONCE(pe->val[1], 0);
WRITE_ONCE(pe->val[2], 0);
WRITE_ONCE(pe->val[3], 0);
WRITE_ONCE(pe->val[4], 0);
WRITE_ONCE(pe->val[5], 0);
WRITE_ONCE(pe->val[6], 0);
WRITE_ONCE(pe->val[7], 0);
}
void intel_pasid_clear_entry(struct device *dev, int pasid)
static void intel_pasid_clear_entry(struct device *dev, int pasid)
{
struct pasid_entry *pe;
@ -237,3 +296,361 @@ void intel_pasid_clear_entry(struct device *dev, int pasid)
pasid_clear_entry(pe);
}
static inline void pasid_set_bits(u64 *ptr, u64 mask, u64 bits)
{
u64 old;
old = READ_ONCE(*ptr);
WRITE_ONCE(*ptr, (old & ~mask) | bits);
}
/*
* Setup the DID(Domain Identifier) field (Bit 64~79) of scalable mode
* PASID entry.
*/
static inline void
pasid_set_domain_id(struct pasid_entry *pe, u64 value)
{
pasid_set_bits(&pe->val[1], GENMASK_ULL(15, 0), value);
}
/*
* Get domain ID value of a scalable mode PASID entry.
*/
static inline u16
pasid_get_domain_id(struct pasid_entry *pe)
{
return (u16)(READ_ONCE(pe->val[1]) & GENMASK_ULL(15, 0));
}
/*
* Setup the SLPTPTR(Second Level Page Table Pointer) field (Bit 12~63)
* of a scalable mode PASID entry.
*/
static inline void
pasid_set_slptr(struct pasid_entry *pe, u64 value)
{
pasid_set_bits(&pe->val[0], VTD_PAGE_MASK, value);
}
/*
* Setup the AW(Address Width) field (Bit 2~4) of a scalable mode PASID
* entry.
*/
static inline void
pasid_set_address_width(struct pasid_entry *pe, u64 value)
{
pasid_set_bits(&pe->val[0], GENMASK_ULL(4, 2), value << 2);
}
/*
* Setup the PGTT(PASID Granular Translation Type) field (Bit 6~8)
* of a scalable mode PASID entry.
*/
static inline void
pasid_set_translation_type(struct pasid_entry *pe, u64 value)
{
pasid_set_bits(&pe->val[0], GENMASK_ULL(8, 6), value << 6);
}
/*
* Enable fault processing by clearing the FPD(Fault Processing
* Disable) field (Bit 1) of a scalable mode PASID entry.
*/
static inline void pasid_set_fault_enable(struct pasid_entry *pe)
{
pasid_set_bits(&pe->val[0], 1 << 1, 0);
}
/*
* Setup the SRE(Supervisor Request Enable) field (Bit 128) of a
* scalable mode PASID entry.
*/
static inline void pasid_set_sre(struct pasid_entry *pe)
{
pasid_set_bits(&pe->val[2], 1 << 0, 1);
}
/*
* Setup the P(Present) field (Bit 0) of a scalable mode PASID
* entry.
*/
static inline void pasid_set_present(struct pasid_entry *pe)
{
pasid_set_bits(&pe->val[0], 1 << 0, 1);
}
/*
* Setup Page Walk Snoop bit (Bit 87) of a scalable mode PASID
* entry.
*/
static inline void pasid_set_page_snoop(struct pasid_entry *pe, bool value)
{
pasid_set_bits(&pe->val[1], 1 << 23, value);
}
/*
* Setup the First Level Page table Pointer field (Bit 140~191)
* of a scalable mode PASID entry.
*/
static inline void
pasid_set_flptr(struct pasid_entry *pe, u64 value)
{
pasid_set_bits(&pe->val[2], VTD_PAGE_MASK, value);
}
/*
* Setup the First Level Paging Mode field (Bit 130~131) of a
* scalable mode PASID entry.
*/
static inline void
pasid_set_flpm(struct pasid_entry *pe, u64 value)
{
pasid_set_bits(&pe->val[2], GENMASK_ULL(3, 2), value << 2);
}
static void
pasid_cache_invalidation_with_pasid(struct intel_iommu *iommu,
u16 did, int pasid)
{
struct qi_desc desc;
desc.qw0 = QI_PC_DID(did) | QI_PC_PASID_SEL | QI_PC_PASID(pasid);
desc.qw1 = 0;
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(&desc, iommu);
}
static void
iotlb_invalidation_with_pasid(struct intel_iommu *iommu, u16 did, u32 pasid)
{
struct qi_desc desc;
desc.qw0 = QI_EIOTLB_PASID(pasid) | QI_EIOTLB_DID(did) |
QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) | QI_EIOTLB_TYPE;
desc.qw1 = 0;
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(&desc, iommu);
}
static void
devtlb_invalidation_with_pasid(struct intel_iommu *iommu,
struct device *dev, int pasid)
{
struct device_domain_info *info;
u16 sid, qdep, pfsid;
info = dev->archdata.iommu;
if (!info || !info->ats_enabled)
return;
sid = info->bus << 8 | info->devfn;
qdep = info->ats_qdep;
pfsid = info->pfsid;
qi_flush_dev_iotlb(iommu, sid, pfsid, qdep, 0, 64 - VTD_PAGE_SHIFT);
}
void intel_pasid_tear_down_entry(struct intel_iommu *iommu,
struct device *dev, int pasid)
{
struct pasid_entry *pte;
u16 did;
pte = intel_pasid_get_entry(dev, pasid);
if (WARN_ON(!pte))
return;
intel_pasid_clear_entry(dev, pasid);
did = pasid_get_domain_id(pte);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
/* Device IOTLB doesn't need to be flushed in caching mode. */
if (!cap_caching_mode(iommu->cap))
devtlb_invalidation_with_pasid(iommu, dev, pasid);
}
/*
* Set up the scalable mode pasid table entry for first only
* translation type.
*/
int intel_pasid_setup_first_level(struct intel_iommu *iommu,
struct device *dev, pgd_t *pgd,
int pasid, u16 did, int flags)
{
struct pasid_entry *pte;
if (!ecap_flts(iommu->ecap)) {
pr_err("No first level translation support on %s\n",
iommu->name);
return -EINVAL;
}
pte = intel_pasid_get_entry(dev, pasid);
if (WARN_ON(!pte))
return -EINVAL;
pasid_clear_entry(pte);
/* Setup the first level page table pointer: */
pasid_set_flptr(pte, (u64)__pa(pgd));
if (flags & PASID_FLAG_SUPERVISOR_MODE) {
if (!ecap_srs(iommu->ecap)) {
pr_err("No supervisor request support on %s\n",
iommu->name);
return -EINVAL;
}
pasid_set_sre(pte);
}
#ifdef CONFIG_X86
if (cpu_feature_enabled(X86_FEATURE_LA57))
pasid_set_flpm(pte, 1);
#endif /* CONFIG_X86 */
pasid_set_domain_id(pte, did);
pasid_set_address_width(pte, iommu->agaw);
pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
/* Setup Present and PASID Granular Transfer Type: */
pasid_set_translation_type(pte, 1);
pasid_set_present(pte);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));
if (cap_caching_mode(iommu->cap)) {
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
} else {
iommu_flush_write_buffer(iommu);
}
return 0;
}
/*
* Set up the scalable mode pasid entry for second only translation type.
*/
int intel_pasid_setup_second_level(struct intel_iommu *iommu,
struct dmar_domain *domain,
struct device *dev, int pasid)
{
struct pasid_entry *pte;
struct dma_pte *pgd;
u64 pgd_val;
int agaw;
u16 did;
/*
* If hardware advertises no support for second level
* translation, return directly.
*/
if (!ecap_slts(iommu->ecap)) {
pr_err("No second level translation support on %s\n",
iommu->name);
return -EINVAL;
}
/*
* Skip top levels of page tables for iommu which has less agaw
* than default. Unnecessary for PT mode.
*/
pgd = domain->pgd;
for (agaw = domain->agaw; agaw > iommu->agaw; agaw--) {
pgd = phys_to_virt(dma_pte_addr(pgd));
if (!dma_pte_present(pgd)) {
dev_err(dev, "Invalid domain page table\n");
return -EINVAL;
}
}
pgd_val = virt_to_phys(pgd);
did = domain->iommu_did[iommu->seq_id];
pte = intel_pasid_get_entry(dev, pasid);
if (!pte) {
dev_err(dev, "Failed to get pasid entry of PASID %d\n", pasid);
return -ENODEV;
}
pasid_clear_entry(pte);
pasid_set_domain_id(pte, did);
pasid_set_slptr(pte, pgd_val);
pasid_set_address_width(pte, agaw);
pasid_set_translation_type(pte, 2);
pasid_set_fault_enable(pte);
pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
/*
* Since it is a second level only translation setup, we should
* set SRE bit as well (addresses are expected to be GPAs).
*/
pasid_set_sre(pte);
pasid_set_present(pte);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));
if (cap_caching_mode(iommu->cap)) {
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
} else {
iommu_flush_write_buffer(iommu);
}
return 0;
}
/*
* Set up the scalable mode pasid entry for passthrough translation type.
*/
int intel_pasid_setup_pass_through(struct intel_iommu *iommu,
struct dmar_domain *domain,
struct device *dev, int pasid)
{
u16 did = FLPT_DEFAULT_DID;
struct pasid_entry *pte;
pte = intel_pasid_get_entry(dev, pasid);
if (!pte) {
dev_err(dev, "Failed to get pasid entry of PASID %d\n", pasid);
return -ENODEV;
}
pasid_clear_entry(pte);
pasid_set_domain_id(pte, did);
pasid_set_address_width(pte, iommu->agaw);
pasid_set_translation_type(pte, 4);
pasid_set_fault_enable(pte);
pasid_set_page_snoop(pte, !!ecap_smpwc(iommu->ecap));
/*
* We should set SRE bit as well since the addresses are expected
* to be GPAs.
*/
pasid_set_sre(pte);
pasid_set_present(pte);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(pte, sizeof(*pte));
if (cap_caching_mode(iommu->cap)) {
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
iotlb_invalidation_with_pasid(iommu, did, pasid);
} else {
iommu_flush_write_buffer(iommu);
}
return 0;
}

40
drivers/iommu/intel-pasid.h
View File

@ -10,11 +10,35 @@
#ifndef __INTEL_PASID_H
#define __INTEL_PASID_H
#define PASID_RID2PASID 0x0
#define PASID_MIN 0x1
#define PASID_MAX 0x20000
#define PASID_MAX 0x100000
#define PASID_PTE_MASK 0x3F
#define PASID_PTE_PRESENT 1
#define PDE_PFN_MASK PAGE_MASK
#define PASID_PDE_SHIFT 6
#define MAX_NR_PASID_BITS 20
/*
* Domain ID reserved for pasid entries programmed for first-level
* only and pass-through transfer modes.
*/
#define FLPT_DEFAULT_DID 1
/*
* The SUPERVISOR_MODE flag indicates a first level translation which
* can be used for access to kernel addresses. It is valid only for
* access to the kernel's static 1:1 mapping of physical memory — not
* to vmalloc or even module mappings.
*/
#define PASID_FLAG_SUPERVISOR_MODE BIT(0)
struct pasid_dir_entry {
u64 val;
};
struct pasid_entry {
u64 val;
u64 val[8];
};
/* The representative of a PASID table */
@ -34,6 +58,16 @@ void intel_pasid_free_table(struct device *dev);
struct pasid_table *intel_pasid_get_table(struct device *dev);
int intel_pasid_get_dev_max_id(struct device *dev);
struct pasid_entry *intel_pasid_get_entry(struct device *dev, int pasid);
void intel_pasid_clear_entry(struct device *dev, int pasid);
int intel_pasid_setup_first_level(struct intel_iommu *iommu,
struct device *dev, pgd_t *pgd,
int pasid, u16 did, int flags);
int intel_pasid_setup_second_level(struct intel_iommu *iommu,
struct dmar_domain *domain,
struct device *dev, int pasid);
int intel_pasid_setup_pass_through(struct intel_iommu *iommu,
struct dmar_domain *domain,
struct device *dev, int pasid);
void intel_pasid_tear_down_entry(struct intel_iommu *iommu,
struct device *dev, int pasid);
#endif /* __INTEL_PASID_H */

171
drivers/iommu/intel-svm.c
View File

@ -29,21 +29,10 @@
#include "intel-pasid.h"
#define PASID_ENTRY_P BIT_ULL(0)
#define PASID_ENTRY_FLPM_5LP BIT_ULL(9)
#define PASID_ENTRY_SRE BIT_ULL(11)
static irqreturn_t prq_event_thread(int irq, void *d);
struct pasid_state_entry {
u64 val;
};
int intel_svm_init(struct intel_iommu *iommu)
{
struct page *pages;
int order;
if (cpu_feature_enabled(X86_FEATURE_GBPAGES) &&
!cap_fl1gp_support(iommu->cap))
return -EINVAL;
@ -52,41 +41,6 @@ int intel_svm_init(struct intel_iommu *iommu)
!cap_5lp_support(iommu->cap))
return -EINVAL;
/* Start at 2 because it's defined as 2^(1+PSS) */
iommu->pasid_max = 2 << ecap_pss(iommu->ecap);
/* Eventually I'm promised we will get a multi-level PASID table
* and it won't have to be physically contiguous. Until then,
* limit the size because 8MiB contiguous allocations can be hard
* to come by. The limit of 0x20000, which is 1MiB for each of
* the PASID and PASID-state tables, is somewhat arbitrary. */
if (iommu->pasid_max > 0x20000)
iommu->pasid_max = 0x20000;
order = get_order(sizeof(struct pasid_entry) * iommu->pasid_max);
if (ecap_dis(iommu->ecap)) {
/* Just making it explicit... */
BUILD_BUG_ON(sizeof(struct pasid_entry) != sizeof(struct pasid_state_entry));
pages = alloc_pages(GFP_KERNEL | __GFP_ZERO, order);
if (pages)
iommu->pasid_state_table = page_address(pages);
else
pr_warn("IOMMU: %s: Failed to allocate PASID state table\n",
iommu->name);
}
return 0;
}
int intel_svm_exit(struct intel_iommu *iommu)
{
int order = get_order(sizeof(struct pasid_entry) * iommu->pasid_max);
if (iommu->pasid_state_table) {
free_pages((unsigned long)iommu->pasid_state_table, order);
iommu->pasid_state_table = NULL;
}
return 0;
}
@ -163,27 +117,40 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
* because that's the only option the hardware gives us. Despite
* the fact that they are actually only accessible through one. */
if (gl)
desc.low = QI_EIOTLB_PASID(svm->pasid) | QI_EIOTLB_DID(sdev->did) |
QI_EIOTLB_GRAN(QI_GRAN_ALL_ALL) | QI_EIOTLB_TYPE;
desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
QI_EIOTLB_DID(sdev->did) |
QI_EIOTLB_GRAN(QI_GRAN_ALL_ALL) |
QI_EIOTLB_TYPE;
else
desc.low = QI_EIOTLB_PASID(svm->pasid) | QI_EIOTLB_DID(sdev->did) |
QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) | QI_EIOTLB_TYPE;
desc.high = 0;
desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
QI_EIOTLB_DID(sdev->did) |
QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) |
QI_EIOTLB_TYPE;
desc.qw1 = 0;
} else {
int mask = ilog2(__roundup_pow_of_two(pages));
desc.low = QI_EIOTLB_PASID(svm->pasid) | QI_EIOTLB_DID(sdev->did) |
QI_EIOTLB_GRAN(QI_GRAN_PSI_PASID) | QI_EIOTLB_TYPE;
desc.high = QI_EIOTLB_ADDR(address) | QI_EIOTLB_GL(gl) |
QI_EIOTLB_IH(ih) | QI_EIOTLB_AM(mask);
desc.qw0 = QI_EIOTLB_PASID(svm->pasid) |
QI_EIOTLB_DID(sdev->did) |
QI_EIOTLB_GRAN(QI_GRAN_PSI_PASID) |
QI_EIOTLB_TYPE;
desc.qw1 = QI_EIOTLB_ADDR(address) |
QI_EIOTLB_GL(gl) |
QI_EIOTLB_IH(ih) |
QI_EIOTLB_AM(mask);
}
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(&desc, svm->iommu);
if (sdev->dev_iotlb) {
desc.low = QI_DEV_EIOTLB_PASID(svm->pasid) | QI_DEV_EIOTLB_SID(sdev->sid) |
QI_DEV_EIOTLB_QDEP(sdev->qdep) | QI_DEIOTLB_TYPE;
desc.qw0 = QI_DEV_EIOTLB_PASID(svm->pasid) |
QI_DEV_EIOTLB_SID(sdev->sid) |
QI_DEV_EIOTLB_QDEP(sdev->qdep) |
QI_DEIOTLB_TYPE;
if (pages == -1) {
desc.high = QI_DEV_EIOTLB_ADDR(-1ULL >> 1) | QI_DEV_EIOTLB_SIZE;
desc.qw1 = QI_DEV_EIOTLB_ADDR(-1ULL >> 1) |
QI_DEV_EIOTLB_SIZE;
} else if (pages > 1) {
/* The least significant zero bit indicates the size. So,
* for example, an "address" value of 0x12345f000 will
@ -191,10 +158,13 @@ static void intel_flush_svm_range_dev (struct intel_svm *svm, struct intel_svm_d
unsigned long last = address + ((unsigned long)(pages - 1) << VTD_PAGE_SHIFT);
unsigned long mask = __rounddown_pow_of_two(address ^ last);
desc.high = QI_DEV_EIOTLB_ADDR((address & ~mask) | (mask - 1)) | QI_DEV_EIOTLB_SIZE;
desc.qw1 = QI_DEV_EIOTLB_ADDR((address & ~mask) |
(mask - 1)) | QI_DEV_EIOTLB_SIZE;
} else {
desc.high = QI_DEV_EIOTLB_ADDR(address);
desc.qw1 = QI_DEV_EIOTLB_ADDR(address);
}
desc.qw2 = 0;
desc.qw3 = 0;
qi_submit_sync(&desc, svm->iommu);
}
}
@ -204,11 +174,6 @@ static void intel_flush_svm_range(struct intel_svm *svm, unsigned long address,
{
struct intel_svm_dev *sdev;
/* Try deferred invalidate if available */
if (svm->iommu->pasid_state_table &&
!cmpxchg64(&svm->iommu->pasid_state_table[svm->pasid].val, 0, 1ULL << 63))
return;
rcu_read_lock();
list_for_each_entry_rcu(sdev, &svm->devs, list)
intel_flush_svm_range_dev(svm, sdev, address, pages, ih, gl);
@ -234,17 +199,6 @@ static void intel_invalidate_range(struct mmu_notifier *mn,
(end - start + PAGE_SIZE - 1) >> VTD_PAGE_SHIFT, 0, 0);
}
static void intel_flush_pasid_dev(struct intel_svm *svm, struct intel_svm_dev *sdev, int pasid)
{
struct qi_desc desc;
desc.high = 0;
desc.low = QI_PC_TYPE | QI_PC_DID(sdev->did) | QI_PC_PASID_SEL | QI_PC_PASID(pasid);
qi_submit_sync(&desc, svm->iommu);
}
static void intel_mm_release(struct mmu_notifier *mn, struct mm_struct *mm)
{
struct intel_svm *svm = container_of(mn, struct intel_svm, notifier);
@ -264,8 +218,7 @@ static void intel_mm_release(struct mmu_notifier *mn, struct mm_struct *mm)
*/
rcu_read_lock();
list_for_each_entry_rcu(sdev, &svm->devs, list) {
intel_pasid_clear_entry(sdev->dev, svm->pasid);
intel_flush_pasid_dev(svm, sdev, svm->pasid);
intel_pasid_tear_down_entry(svm->iommu, sdev->dev, svm->pasid);
intel_flush_svm_range_dev(svm, sdev, 0, -1, 0, !svm->mm);
}
rcu_read_unlock();
@ -284,11 +237,9 @@ static LIST_HEAD(global_svm_list);
int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_ops *ops)
{
struct intel_iommu *iommu = intel_svm_device_to_iommu(dev);
struct pasid_entry *entry;
struct intel_svm_dev *sdev;
struct intel_svm *svm = NULL;
struct mm_struct *mm = NULL;
u64 pasid_entry_val;
int pasid_max;
int ret;
@ -397,24 +348,22 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
kfree(sdev);
goto out;
}
pasid_entry_val = (u64)__pa(mm->pgd) | PASID_ENTRY_P;
} else
pasid_entry_val = (u64)__pa(init_mm.pgd) |
PASID_ENTRY_P | PASID_ENTRY_SRE;
if (cpu_feature_enabled(X86_FEATURE_LA57))
pasid_entry_val |= PASID_ENTRY_FLPM_5LP;
}
entry = intel_pasid_get_entry(dev, svm->pasid);
entry->val = pasid_entry_val;
wmb();
/*
* Flush PASID cache when a PASID table entry becomes
* present.
*/
if (cap_caching_mode(iommu->cap))
intel_flush_pasid_dev(svm, sdev, svm->pasid);
spin_lock(&iommu->lock);
ret = intel_pasid_setup_first_level(iommu, dev,
mm ? mm->pgd : init_mm.pgd,
svm->pasid, FLPT_DEFAULT_DID,
mm ? 0 : PASID_FLAG_SUPERVISOR_MODE);
spin_unlock(&iommu->lock);
if (ret) {
if (mm)
mmu_notifier_unregister(&svm->notifier, mm);
intel_pasid_free_id(svm->pasid);
kfree(svm);
kfree(sdev);
goto out;
}
list_add_tail(&svm->list, &global_svm_list);
}
@ -460,10 +409,9 @@ int intel_svm_unbind_mm(struct device *dev, int pasid)
* to use. We have a *shared* PASID table, because it's
* large and has to be physically contiguous. So it's
* hard to be as defensive as we might like. */
intel_flush_pasid_dev(svm, sdev, svm->pasid);
intel_pasid_tear_down_entry(iommu, dev, svm->pasid);
intel_flush_svm_range_dev(svm, sdev, 0, -1, 0, !svm->mm);
kfree_rcu(sdev, rcu);
intel_pasid_clear_entry(dev, svm->pasid);
if (list_empty(&svm->devs)) {
intel_pasid_free_id(svm->pasid);
@ -671,24 +619,27 @@ static irqreturn_t prq_event_thread(int irq, void *d)
no_pasid:
if (req->lpig) {
/* Page Group Response */
resp.low = QI_PGRP_PASID(req->pasid) |
resp.qw0 = QI_PGRP_PASID(req->pasid) |
QI_PGRP_DID((req->bus << 8) | req->devfn) |
QI_PGRP_PASID_P(req->pasid_present) |
QI_PGRP_RESP_TYPE;
resp.high = QI_PGRP_IDX(req->prg_index) |
QI_PGRP_PRIV(req->private) | QI_PGRP_RESP_CODE(result);
qi_submit_sync(&resp, iommu);
resp.qw1 = QI_PGRP_IDX(req->prg_index) |
QI_PGRP_PRIV(req->private) |
QI_PGRP_RESP_CODE(result);
} else if (req->srr) {
/* Page Stream Response */
resp.low = QI_PSTRM_IDX(req->prg_index) |
QI_PSTRM_PRIV(req->private) | QI_PSTRM_BUS(req->bus) |
QI_PSTRM_PASID(req->pasid) | QI_PSTRM_RESP_TYPE;
resp.high = QI_PSTRM_ADDR(address) | QI_PSTRM_DEVFN(req->devfn) |
resp.qw0 = QI_PSTRM_IDX(req->prg_index) |
QI_PSTRM_PRIV(req->private) |
QI_PSTRM_BUS(req->bus) |
QI_PSTRM_PASID(req->pasid) |
QI_PSTRM_RESP_TYPE;
resp.qw1 = QI_PSTRM_ADDR(address) |
QI_PSTRM_DEVFN(req->devfn) |
QI_PSTRM_RESP_CODE(result);
qi_submit_sync(&resp, iommu);
}
resp.qw2 = 0;
resp.qw3 = 0;
qi_submit_sync(&resp, iommu);
head = (head + sizeof(*req)) & PRQ_RING_MASK;
}

6
drivers/iommu/intel_irq_remapping.c
View File

@ -145,9 +145,11 @@ static int qi_flush_iec(struct intel_iommu *iommu, int index, int mask)
{
struct qi_desc desc;
desc.low = QI_IEC_IIDEX(index) | QI_IEC_TYPE | QI_IEC_IM(mask)
desc.qw0 = QI_IEC_IIDEX(index) | QI_IEC_TYPE | QI_IEC_IM(mask)
| QI_IEC_SELECTIVE;
desc.high = 0;
desc.qw1 = 0;
desc.qw2 = 0;
desc.qw3 = 0;
return qi_submit_sync(&desc, iommu);
}

4
drivers/iommu/io-pgtable-arm-v7s.c
View File

@ -709,10 +709,6 @@ static struct io_pgtable *arm_v7s_alloc_pgtable(struct io_pgtable_cfg *cfg,
{
struct arm_v7s_io_pgtable *data;
#ifdef PHYS_OFFSET
if (upper_32_bits(PHYS_OFFSET))
return NULL;
#endif
if (cfg->ias > ARM_V7S_ADDR_BITS || cfg->oas > ARM_V7S_ADDR_BITS)
return NULL;

14
drivers/iommu/iommu-sysfs.c
View File

@ -11,7 +11,7 @@
#include <linux/device.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
/*
@ -22,25 +22,25 @@ static struct attribute *devices_attr[] = {
NULL,
};
static const struct attribute_group iommu_devices_attr_group = {
static const struct attribute_group devices_attr_group = {
.name = "devices",
.attrs = devices_attr,
};
static const struct attribute_group *iommu_dev_groups[] = {
&iommu_devices_attr_group,
static const struct attribute_group *dev_groups[] = {
&devices_attr_group,
NULL,
};
static void iommu_release_device(struct device *dev)
static void release_device(struct device *dev)
{
kfree(dev);
}
static struct class iommu_class = {
.name = "iommu",
.dev_release = iommu_release_device,
.dev_groups = iommu_dev_groups,
.dev_release = release_device,
.dev_groups = dev_groups,
};
static int __init iommu_dev_init(void)

111
drivers/iommu/iommu.c
View File

@ -22,7 +22,8 @@
#include <linux/kernel.h>
#include <linux/bug.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/export.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/iommu.h>
@ -110,6 +111,27 @@ void iommu_device_unregister(struct iommu_device *iommu)
spin_unlock(&iommu_device_lock);
}
int iommu_probe_device(struct device *dev)
{
const struct iommu_ops *ops = dev->bus->iommu_ops;
int ret = -EINVAL;
WARN_ON(dev->iommu_group);
if (ops)
ret = ops->add_device(dev);
return ret;
}
void iommu_release_device(struct device *dev)
{
const struct iommu_ops *ops = dev->bus->iommu_ops;
if (dev->iommu_group)
ops->remove_device(dev);
}
static struct iommu_domain *__iommu_domain_alloc(struct bus_type *bus,
unsigned type);
static int __iommu_attach_device(struct iommu_domain *domain,
@ -1117,16 +1139,7 @@ struct iommu_domain *iommu_group_default_domain(struct iommu_group *group)
static int add_iommu_group(struct device *dev, void *data)
{
struct iommu_callback_data *cb = data;
const struct iommu_ops *ops = cb->ops;
int ret;
if (!ops->add_device)
return 0;
WARN_ON(dev->iommu_group);
ret = ops->add_device(dev);
int ret = iommu_probe_device(dev);
/*
* We ignore -ENODEV errors for now, as they just mean that the
@ -1141,11 +1154,7 @@ static int add_iommu_group(struct device *dev, void *data)
static int remove_iommu_group(struct device *dev, void *data)
{
struct iommu_callback_data *cb = data;
const struct iommu_ops *ops = cb->ops;
if (ops->remove_device && dev->iommu_group)
ops->remove_device(dev);
iommu_release_device(dev);
return 0;
}
@ -1153,27 +1162,22 @@ static int remove_iommu_group(struct device *dev, void *data)
static int iommu_bus_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct device *dev = data;
const struct iommu_ops *ops = dev->bus->iommu_ops;
struct iommu_group *group;
unsigned long group_action = 0;
struct device *dev = data;
struct iommu_group *group;
/*
* ADD/DEL call into iommu driver ops if provided, which may
* result in ADD/DEL notifiers to group->notifier
*/
if (action == BUS_NOTIFY_ADD_DEVICE) {
if (ops->add_device) {
int ret;
ret = ops->add_device(dev);
ret = iommu_probe_device(dev);
return (ret) ? NOTIFY_DONE : NOTIFY_OK;
}
} else if (action == BUS_NOTIFY_REMOVED_DEVICE) {
if (ops->remove_device && dev->iommu_group) {
ops->remove_device(dev);
return 0;
}
iommu_release_device(dev);
return NOTIFY_OK;
}
/*
@ -1712,33 +1716,32 @@ EXPORT_SYMBOL_GPL(iommu_unmap_fast);
size_t iommu_map_sg(struct iommu_domain *domain, unsigned long iova,
struct scatterlist *sg, unsigned int nents, int prot)
{
struct scatterlist *s;
size_t mapped = 0;
unsigned int i, min_pagesz;
size_t len = 0, mapped = 0;
phys_addr_t start;
unsigned int i = 0;
int ret;
if (unlikely(domain->pgsize_bitmap == 0UL))
return 0;
while (i <= nents) {
phys_addr_t s_phys = sg_phys(sg);
min_pagesz = 1 << __ffs(domain->pgsize_bitmap);
for_each_sg(sg, s, nents, i) {
phys_addr_t phys = page_to_phys(sg_page(s)) + s->offset;
/*
* We are mapping on IOMMU page boundaries, so offset within
* the page must be 0. However, the IOMMU may support pages
* smaller than PAGE_SIZE, so s->offset may still represent
* an offset of that boundary within the CPU page.
*/
if (!IS_ALIGNED(s->offset, min_pagesz))
goto out_err;
ret = iommu_map(domain, iova + mapped, phys, s->length, prot);
if (len && s_phys != start + len) {
ret = iommu_map(domain, iova + mapped, start, len, prot);
if (ret)
goto out_err;
mapped += s->length;
mapped += len;
len = 0;
}
if (len) {
len += sg->length;
} else {
len = sg->length;
start = s_phys;
}
if (++i < nents)
sg = sg_next(sg);
}
return mapped;
@ -1976,7 +1979,7 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode)
int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
const struct iommu_ops *ops)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
if (fwspec)
return ops == fwspec->ops ? 0 : -EINVAL;
@ -1988,26 +1991,26 @@ int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
of_node_get(to_of_node(iommu_fwnode));
fwspec->iommu_fwnode = iommu_fwnode;
fwspec->ops = ops;
dev->iommu_fwspec = fwspec;
dev_iommu_fwspec_set(dev, fwspec);
return 0;
}
EXPORT_SYMBOL_GPL(iommu_fwspec_init);
void iommu_fwspec_free(struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
if (fwspec) {
fwnode_handle_put(fwspec->iommu_fwnode);
kfree(fwspec);
dev->iommu_fwspec = NULL;
dev_iommu_fwspec_set(dev, NULL);
}
}
EXPORT_SYMBOL_GPL(iommu_fwspec_free);
int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
size_t size;
int i;
@ -2016,11 +2019,11 @@ int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids)
size = offsetof(struct iommu_fwspec, ids[fwspec->num_ids + num_ids]);
if (size > sizeof(*fwspec)) {
fwspec = krealloc(dev->iommu_fwspec, size, GFP_KERNEL);
fwspec = krealloc(fwspec, size, GFP_KERNEL);
if (!fwspec)
return -ENOMEM;
dev->iommu_fwspec = fwspec;
dev_iommu_fwspec_set(dev, fwspec);
}
for (i = 0; i < num_ids; i++)

88
drivers/iommu/ipmmu-vmsa.c
View File

@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
/*
* IPMMU VMSA
* IOMMU API for Renesas VMSA-compatible IPMMU
* Author: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
*
* Copyright (C) 2014 Renesas Electronics Corporation
*/
@ -11,10 +12,10 @@
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/iommu.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/of_iommu.h>
@ -81,7 +82,9 @@ static struct ipmmu_vmsa_domain *to_vmsa_domain(struct iommu_domain *dom)
static struct ipmmu_vmsa_device *to_ipmmu(struct device *dev)
{
return dev->iommu_fwspec ? dev->iommu_fwspec->iommu_priv : NULL;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
return fwspec ? fwspec->iommu_priv : NULL;
}
#define TLB_LOOP_TIMEOUT 100 /* 100us */
@ -643,7 +646,7 @@ static void ipmmu_domain_free(struct iommu_domain *io_domain)
static int ipmmu_attach_device(struct iommu_domain *io_domain,
struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct ipmmu_vmsa_device *mmu = to_ipmmu(dev);
struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
unsigned int i;
@ -692,7 +695,7 @@ static int ipmmu_attach_device(struct iommu_domain *io_domain,
static void ipmmu_detach_device(struct iommu_domain *io_domain,
struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct ipmmu_vmsa_domain *domain = to_vmsa_domain(io_domain);
unsigned int i;
@ -744,36 +747,71 @@ static phys_addr_t ipmmu_iova_to_phys(struct iommu_domain *io_domain,
static int ipmmu_init_platform_device(struct device *dev,
struct of_phandle_args *args)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct platform_device *ipmmu_pdev;
ipmmu_pdev = of_find_device_by_node(args->np);
if (!ipmmu_pdev)
return -ENODEV;
dev->iommu_fwspec->iommu_priv = platform_get_drvdata(ipmmu_pdev);
fwspec->iommu_priv = platform_get_drvdata(ipmmu_pdev);
return 0;
}
static bool ipmmu_slave_whitelist(struct device *dev)
{
/* By default, do not allow use of IPMMU */
return false;
}
static const struct soc_device_attribute soc_rcar_gen3[] = {
{ .soc_id = "r8a774a1", },
{ .soc_id = "r8a774c0", },
{ .soc_id = "r8a7795", },
{ .soc_id = "r8a7796", },
{ .soc_id = "r8a77965", },
{ .soc_id = "r8a77970", },
{ .soc_id = "r8a77990", },
{ .soc_id = "r8a77995", },
{ /* sentinel */ }
};
static const struct soc_device_attribute soc_rcar_gen3_whitelist[] = {
{ .soc_id = "r8a774c0", },
{ .soc_id = "r8a7795", .revision = "ES3.*" },
{ .soc_id = "r8a77965", },
{ .soc_id = "r8a77990", },
{ .soc_id = "r8a77995", },
{ /* sentinel */ }
};
static const char * const rcar_gen3_slave_whitelist[] = {
};
static bool ipmmu_slave_whitelist(struct device *dev)
{
unsigned int i;
/*
* For R-Car Gen3 use a white list to opt-in slave devices.
* For Other SoCs, this returns true anyway.
*/
if (!soc_device_match(soc_rcar_gen3))
return true;
/* Check whether this R-Car Gen3 can use the IPMMU correctly or not */
if (!soc_device_match(soc_rcar_gen3_whitelist))
return false;
/* Check whether this slave device can work with the IPMMU */
for (i = 0; i < ARRAY_SIZE(rcar_gen3_slave_whitelist); i++) {
if (!strcmp(dev_name(dev), rcar_gen3_slave_whitelist[i]))
return true;
}
/* Otherwise, do not allow use of IPMMU */
return false;
}
static int ipmmu_of_xlate(struct device *dev,
struct of_phandle_args *spec)
{
/* For R-Car Gen3 use a white list to opt-in slave devices */
if (soc_device_match(soc_rcar_gen3) && !ipmmu_slave_whitelist(dev))
if (!ipmmu_slave_whitelist(dev))
return -ENODEV;
iommu_fwspec_add_ids(dev, spec->args, 1);
@ -940,6 +978,12 @@ static const struct of_device_id ipmmu_of_ids[] = {
{
.compatible = "renesas,ipmmu-vmsa",
.data = &ipmmu_features_default,
}, {
.compatible = "renesas,ipmmu-r8a774a1",
.data = &ipmmu_features_rcar_gen3,
}, {
.compatible = "renesas,ipmmu-r8a774c0",
.data = &ipmmu_features_rcar_gen3,
}, {
.compatible = "renesas,ipmmu-r8a7795",
.data = &ipmmu_features_rcar_gen3,
@ -952,6 +996,9 @@ static const struct of_device_id ipmmu_of_ids[] = {
}, {
.compatible = "renesas,ipmmu-r8a77970",
.data = &ipmmu_features_rcar_gen3,
}, {
.compatible = "renesas,ipmmu-r8a77990",
.data = &ipmmu_features_rcar_gen3,
}, {
.compatible = "renesas,ipmmu-r8a77995",
.data = &ipmmu_features_rcar_gen3,
@ -960,8 +1007,6 @@ static const struct of_device_id ipmmu_of_ids[] = {
},
};
MODULE_DEVICE_TABLE(of, ipmmu_of_ids);
static int ipmmu_probe(struct platform_device *pdev)
{
struct ipmmu_vmsa_device *mmu;
@ -1132,15 +1177,4 @@ static int __init ipmmu_init(void)
setup_done = true;
return 0;
}
static void __exit ipmmu_exit(void)
{
return platform_driver_unregister(&ipmmu_driver);
}
subsys_initcall(ipmmu_init);
module_exit(ipmmu_exit);
MODULE_DESCRIPTION("IOMMU API for Renesas VMSA-compatible IPMMU");
MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
MODULE_LICENSE("GPL v2");

1
drivers/iommu/irq_remapping.c
View File

@ -1,4 +1,3 @@
#include <linux/seq_file.h>
#include <linux/cpumask.h>
#include <linux/kernel.h>
#include <linux/string.h>

13
drivers/iommu/msm_iommu.c
View File

@ -1,4 +1,6 @@
/* Copyright (c) 2010-2011, Code Aurora Forum. All rights reserved.
*
* Author: Stepan Moskovchenko <stepanm@codeaurora.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@ -17,7 +19,7 @@
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/errno.h>
#include <linux/io.h>
@ -861,14 +863,5 @@ static int __init msm_iommu_driver_init(void)
return ret;
}
static void __exit msm_iommu_driver_exit(void)
{
platform_driver_unregister(&msm_iommu_driver);
}
subsys_initcall(msm_iommu_driver_init);
module_exit(msm_iommu_driver_exit);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Stepan Moskovchenko <stepanm@codeaurora.org>");

25
drivers/iommu/mtk_iommu.c
View File

@ -113,7 +113,7 @@ struct mtk_iommu_domain {
struct iommu_domain domain;
};
static struct iommu_ops mtk_iommu_ops;
static const struct iommu_ops mtk_iommu_ops;
static LIST_HEAD(m4ulist); /* List all the M4U HWs */
@ -244,7 +244,7 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
{
struct mtk_smi_larb_iommu *larb_mmu;
unsigned int larbid, portid;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
int i;
for (i = 0; i < fwspec->num_ids; ++i) {
@ -336,7 +336,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct mtk_iommu_domain *dom = to_mtk_domain(domain);
struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
if (!data)
return -ENODEV;
@ -355,7 +355,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
static void mtk_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
if (!data)
return;
@ -417,13 +417,14 @@ static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
static int mtk_iommu_add_device(struct device *dev)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct mtk_iommu_data *data;
struct iommu_group *group;
if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops)
if (!fwspec || fwspec->ops != &mtk_iommu_ops)
return -ENODEV; /* Not a iommu client device */
data = dev->iommu_fwspec->iommu_priv;
data = fwspec->iommu_priv;
iommu_device_link(&data->iommu, dev);
group = iommu_group_get_for_dev(dev);
@ -436,12 +437,13 @@ static int mtk_iommu_add_device(struct device *dev)
static void mtk_iommu_remove_device(struct device *dev)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct mtk_iommu_data *data;
if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops)
if (!fwspec || fwspec->ops != &mtk_iommu_ops)
return;
data = dev->iommu_fwspec->iommu_priv;
data = fwspec->iommu_priv;
iommu_device_unlink(&data->iommu, dev);
iommu_group_remove_device(dev);
@ -468,6 +470,7 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev)
static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct platform_device *m4updev;
if (args->args_count != 1) {
@ -476,19 +479,19 @@ static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
return -EINVAL;
}
if (!dev->iommu_fwspec->iommu_priv) {
if (!fwspec->iommu_priv) {
/* Get the m4u device */
m4updev = of_find_device_by_node(args->np);
if (WARN_ON(!m4updev))
return -EINVAL;
dev->iommu_fwspec->iommu_priv = platform_get_drvdata(m4updev);
fwspec->iommu_priv = platform_get_drvdata(m4updev);
}
return iommu_fwspec_add_ids(dev, args->args, 1);
}
static struct iommu_ops mtk_iommu_ops = {
static const struct iommu_ops mtk_iommu_ops = {
.domain_alloc = mtk_iommu_domain_alloc,
.domain_free = mtk_iommu_domain_free,
.attach_dev = mtk_iommu_attach_device,

47
drivers/iommu/mtk_iommu_v1.c
View File

@ -1,4 +1,6 @@
/*
* IOMMU API for MTK architected m4u v1 implementations
*
* Copyright (c) 2015-2016 MediaTek Inc.
* Author: Honghui Zhang <honghui.zhang@mediatek.com>
*
@ -35,7 +37,7 @@
#include <linux/spinlock.h>
#include <asm/barrier.h>
#include <asm/dma-iommu.h>
#include <linux/module.h>
#include <linux/init.h>
#include <dt-bindings/memory/mt2701-larb-port.h>
#include <soc/mediatek/smi.h>
#include "mtk_iommu.h"
@ -206,7 +208,7 @@ static void mtk_iommu_config(struct mtk_iommu_data *data,
{
struct mtk_smi_larb_iommu *larb_mmu;
unsigned int larbid, portid;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
int i;
for (i = 0; i < fwspec->num_ids; ++i) {
@ -271,7 +273,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct mtk_iommu_domain *dom = to_mtk_domain(domain);
struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
int ret;
if (!data)
@ -293,7 +295,7 @@ static int mtk_iommu_attach_device(struct iommu_domain *domain,
static void mtk_iommu_detach_device(struct iommu_domain *domain,
struct device *dev)
{
struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv;
struct mtk_iommu_data *data = dev_iommu_fwspec_get(dev)->iommu_priv;
if (!data)
return;
@ -362,7 +364,7 @@ static phys_addr_t mtk_iommu_iova_to_phys(struct iommu_domain *domain,
return pa;
}
static struct iommu_ops mtk_iommu_ops;
static const struct iommu_ops mtk_iommu_ops;
/*
* MTK generation one iommu HW only support one iommu domain, and all the client
@ -371,6 +373,7 @@ static struct iommu_ops mtk_iommu_ops;
static int mtk_iommu_create_mapping(struct device *dev,
struct of_phandle_args *args)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct mtk_iommu_data *data;
struct platform_device *m4updev;
struct dma_iommu_mapping *mtk_mapping;
@ -383,28 +386,29 @@ static int mtk_iommu_create_mapping(struct device *dev,
return -EINVAL;
}
if (!dev->iommu_fwspec) {
if (!fwspec) {
ret = iommu_fwspec_init(dev, &args->np->fwnode, &mtk_iommu_ops);
if (ret)
return ret;
} else if (dev->iommu_fwspec->ops != &mtk_iommu_ops) {
fwspec = dev_iommu_fwspec_get(dev);
} else if (dev_iommu_fwspec_get(dev)->ops != &mtk_iommu_ops) {
return -EINVAL;
}
if (!dev->iommu_fwspec->iommu_priv) {
if (!fwspec->iommu_priv) {
/* Get the m4u device */
m4updev = of_find_device_by_node(args->np);
if (WARN_ON(!m4updev))
return -EINVAL;
dev->iommu_fwspec->iommu_priv = platform_get_drvdata(m4updev);
fwspec->iommu_priv = platform_get_drvdata(m4updev);
}
ret = iommu_fwspec_add_ids(dev, args->args, 1);
if (ret)
return ret;
data = dev->iommu_fwspec->iommu_priv;
data = fwspec->iommu_priv;
m4udev = data->dev;
mtk_mapping = m4udev->archdata.iommu;
if (!mtk_mapping) {
@ -422,6 +426,7 @@ static int mtk_iommu_create_mapping(struct device *dev,
static int mtk_iommu_add_device(struct device *dev)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct dma_iommu_mapping *mtk_mapping;
struct of_phandle_args iommu_spec;
struct of_phandle_iterator it;
@ -440,7 +445,7 @@ static int mtk_iommu_add_device(struct device *dev)
of_node_put(iommu_spec.np);
}
if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops)
if (!fwspec || fwspec->ops != &mtk_iommu_ops)
return -ENODEV; /* Not a iommu client device */
/*
@ -458,7 +463,7 @@ static int mtk_iommu_add_device(struct device *dev)
if (err)
return err;
data = dev->iommu_fwspec->iommu_priv;
data = fwspec->iommu_priv;
mtk_mapping = data->dev->archdata.iommu;
err = arm_iommu_attach_device(dev, mtk_mapping);
if (err) {
@ -471,12 +476,13 @@ static int mtk_iommu_add_device(struct device *dev)
static void mtk_iommu_remove_device(struct device *dev)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct mtk_iommu_data *data;
if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &mtk_iommu_ops)
if (!fwspec || fwspec->ops != &mtk_iommu_ops)
return;
data = dev->iommu_fwspec->iommu_priv;
data = fwspec->iommu_priv;
iommu_device_unlink(&data->iommu, dev);
iommu_group_remove_device(dev);
@ -524,7 +530,7 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
return 0;
}
static struct iommu_ops mtk_iommu_ops = {
static const struct iommu_ops mtk_iommu_ops = {
.domain_alloc = mtk_iommu_domain_alloc,
.domain_free = mtk_iommu_domain_free,
.attach_dev = mtk_iommu_attach_device,
@ -704,15 +710,4 @@ static int __init m4u_init(void)
{
return platform_driver_register(&mtk_iommu_driver);
}
static void __exit m4u_exit(void)
{
return platform_driver_unregister(&mtk_iommu_driver);
}
subsys_initcall(m4u_init);
module_exit(m4u_exit);
MODULE_DESCRIPTION("IOMMU API for MTK architected m4u v1 implementations");
MODULE_AUTHOR("Honghui Zhang <honghui.zhang@mediatek.com>");
MODULE_LICENSE("GPL v2");

16
drivers/iommu/of_iommu.c
View File

@ -164,7 +164,7 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
struct device_node *master_np)
{
const struct iommu_ops *ops = NULL;
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
int err = NO_IOMMU;
if (!master_np)
@ -208,20 +208,24 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
}
}
/*
* Two success conditions can be represented by non-negative err here:
* >0 : there is no IOMMU, or one was unavailable for non-fatal reasons
* 0 : we found an IOMMU, and dev->fwspec is initialised appropriately
* <0 : any actual error
*/
if (!err)
ops = dev->iommu_fwspec->ops;
if (!err) {
/* The fwspec pointer changed, read it again */
fwspec = dev_iommu_fwspec_get(dev);
ops = fwspec->ops;
}
/*
* If we have reason to believe the IOMMU driver missed the initial
* add_device callback for dev, replay it to get things in order.
* probe for dev, replay it to get things in order.
*/
if (ops && ops->add_device && dev->bus && !dev->iommu_group)
err = ops->add_device(dev);
if (dev->bus && !device_iommu_mapped(dev))
err = iommu_probe_device(dev);
/* Ignore all other errors apart from EPROBE_DEFER */
if (err == -EPROBE_DEFER) {

25
drivers/iommu/omap-iommu-debug.c
View File

@ -159,7 +159,7 @@ static size_t omap_dump_tlb_entries(struct omap_iommu *obj, struct seq_file *s)
return 0;
}
static int debug_read_tlb(struct seq_file *s, void *data)
static int tlb_show(struct seq_file *s, void *data)
{
struct omap_iommu *obj = s->private;
@ -210,7 +210,7 @@ static void dump_ioptable(struct seq_file *s)
spin_unlock(&obj->page_table_lock);
}
static int debug_read_pagetable(struct seq_file *s, void *data)
static int pagetable_show(struct seq_file *s, void *data)
{
struct omap_iommu *obj = s->private;
@ -228,35 +228,22 @@ static int debug_read_pagetable(struct seq_file *s, void *data)
return 0;
}
#define DEBUG_SEQ_FOPS_RO(name) \
static int debug_open_##name(struct inode *inode, struct file *file) \
{ \
return single_open(file, debug_read_##name, inode->i_private); \
} \
\
static const struct file_operations debug_##name##_fops = { \
.open = debug_open_##name, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
}
#define DEBUG_FOPS_RO(name) \
static const struct file_operations debug_##name##_fops = { \
static const struct file_operations name##_fops = { \
.open = simple_open, \
.read = debug_read_##name, \
.llseek = generic_file_llseek, \
}
DEBUG_FOPS_RO(regs);
DEBUG_SEQ_FOPS_RO(tlb);
DEBUG_SEQ_FOPS_RO(pagetable);
DEFINE_SHOW_ATTRIBUTE(tlb);
DEFINE_SHOW_ATTRIBUTE(pagetable);
#define __DEBUG_ADD_FILE(attr, mode) \
{ \
struct dentry *dent; \
dent = debugfs_create_file(#attr, mode, obj->debug_dir, \
obj, &debug_##attr##_fops); \
obj, &attr##_fops); \
if (!dent) \
goto err; \
}

34
drivers/iommu/qcom_iommu.c
View File

@ -29,7 +29,7 @@
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <linux/kconfig.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/mutex.h>
#include <linux/of.h>
#include <linux/of_address.h>
@ -354,7 +354,8 @@ static void qcom_iommu_domain_free(struct iommu_domain *domain)
static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev)
{
struct qcom_iommu_dev *qcom_iommu = to_iommu(dev->iommu_fwspec);
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct qcom_iommu_dev *qcom_iommu = to_iommu(fwspec);
struct qcom_iommu_domain *qcom_domain = to_qcom_iommu_domain(domain);
int ret;
@ -365,7 +366,7 @@ static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev
/* Ensure that the domain is finalized */
pm_runtime_get_sync(qcom_iommu->dev);
ret = qcom_iommu_init_domain(domain, qcom_iommu, dev->iommu_fwspec);
ret = qcom_iommu_init_domain(domain, qcom_iommu, fwspec);
pm_runtime_put_sync(qcom_iommu->dev);
if (ret < 0)
return ret;
@ -387,7 +388,7 @@ static int qcom_iommu_attach_dev(struct iommu_domain *domain, struct device *dev
static void qcom_iommu_detach_dev(struct iommu_domain *domain, struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct qcom_iommu_dev *qcom_iommu = to_iommu(fwspec);
struct qcom_iommu_domain *qcom_domain = to_qcom_iommu_domain(domain);
unsigned i;
@ -500,7 +501,7 @@ static bool qcom_iommu_capable(enum iommu_cap cap)
static int qcom_iommu_add_device(struct device *dev)
{
struct qcom_iommu_dev *qcom_iommu = to_iommu(dev->iommu_fwspec);
struct qcom_iommu_dev *qcom_iommu = to_iommu(dev_iommu_fwspec_get(dev));
struct iommu_group *group;
struct device_link *link;
@ -531,7 +532,7 @@ static int qcom_iommu_add_device(struct device *dev)
static void qcom_iommu_remove_device(struct device *dev)
{
struct qcom_iommu_dev *qcom_iommu = to_iommu(dev->iommu_fwspec);
struct qcom_iommu_dev *qcom_iommu = to_iommu(dev_iommu_fwspec_get(dev));
if (!qcom_iommu)
return;
@ -543,6 +544,7 @@ static void qcom_iommu_remove_device(struct device *dev)
static int qcom_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
{
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct qcom_iommu_dev *qcom_iommu;
struct platform_device *iommu_pdev;
unsigned asid = args->args[0];
@ -568,14 +570,14 @@ static int qcom_iommu_of_xlate(struct device *dev, struct of_phandle_args *args)
WARN_ON(asid > qcom_iommu->num_ctxs))
return -EINVAL;
if (!dev->iommu_fwspec->iommu_priv) {
dev->iommu_fwspec->iommu_priv = qcom_iommu;
if (!fwspec->iommu_priv) {
fwspec->iommu_priv = qcom_iommu;
} else {
/* make sure devices iommus dt node isn't referring to
* multiple different iommu devices. Multiple context
* banks are ok, but multiple devices are not:
*/
if (WARN_ON(qcom_iommu != dev->iommu_fwspec->iommu_priv))
if (WARN_ON(qcom_iommu != fwspec->iommu_priv))
return -EINVAL;
}
@ -908,7 +910,6 @@ static const struct of_device_id qcom_iommu_of_match[] = {
{ .compatible = "qcom,msm-iommu-v1" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, qcom_iommu_of_match);
static struct platform_driver qcom_iommu_driver = {
.driver = {
@ -934,15 +935,4 @@ static int __init qcom_iommu_init(void)
return ret;
}
static void __exit qcom_iommu_exit(void)
{
platform_driver_unregister(&qcom_iommu_driver);
platform_driver_unregister(&qcom_iommu_ctx_driver);
}
module_init(qcom_iommu_init);
module_exit(qcom_iommu_exit);
MODULE_DESCRIPTION("IOMMU API for QCOM IOMMU v1 implementations");
MODULE_LICENSE("GPL v2");
device_initcall(qcom_iommu_init);

13
drivers/iommu/rockchip-iommu.c
View File

@ -1,4 +1,9 @@
/*
* IOMMU API for Rockchip
*
* Module Authors: Simon Xue <xxm@rock-chips.com>
* Daniel Kurtz <djkurtz@chromium.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
@ -17,7 +22,7 @@
#include <linux/iopoll.h>
#include <linux/list.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/of.h>
#include <linux/of_iommu.h>
#include <linux/of_platform.h>
@ -1281,7 +1286,6 @@ static const struct of_device_id rk_iommu_dt_ids[] = {
{ .compatible = "rockchip,iommu" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, rk_iommu_dt_ids);
static struct platform_driver rk_iommu_driver = {
.probe = rk_iommu_probe,
@ -1299,8 +1303,3 @@ static int __init rk_iommu_init(void)
return platform_driver_register(&rk_iommu_driver);
}
subsys_initcall(rk_iommu_init);
MODULE_DESCRIPTION("IOMMU API for Rockchip");
MODULE_AUTHOR("Simon Xue <xxm@rock-chips.com> and Daniel Kurtz <djkurtz@chromium.org>");
MODULE_ALIAS("platform:rockchip-iommu");
MODULE_LICENSE("GPL v2");

37
drivers/iommu/tegra-gart.c
View File

@ -3,6 +3,8 @@
*
* Copyright (c) 2010-2012, NVIDIA CORPORATION. All rights reserved.
*
* Author: Hiroshi DOYU <hdoyu@nvidia.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
@ -19,7 +21,8 @@
#define pr_fmt(fmt) "%s(): " fmt, __func__
#include <linux/module.h>
#include <linux/init.h>
#include <linux/moduleparam.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
@ -478,20 +481,6 @@ static int tegra_gart_probe(struct platform_device *pdev)
return 0;
}
static int tegra_gart_remove(struct platform_device *pdev)
{
struct gart_device *gart = platform_get_drvdata(pdev);
iommu_device_unregister(&gart->iommu);
iommu_device_sysfs_remove(&gart->iommu);
writel(0, gart->regs + GART_CONFIG);
if (gart->savedata)
vfree(gart->savedata);
gart_handle = NULL;
return 0;
}
static const struct dev_pm_ops tegra_gart_pm_ops = {
.suspend = tegra_gart_suspend,
.resume = tegra_gart_resume,
@ -501,34 +490,22 @@ static const struct of_device_id tegra_gart_of_match[] = {
{ .compatible = "nvidia,tegra20-gart", },
{ },
};
MODULE_DEVICE_TABLE(of, tegra_gart_of_match);
static struct platform_driver tegra_gart_driver = {
.probe = tegra_gart_probe,
.remove = tegra_gart_remove,
.driver = {
.name = "tegra-gart",
.pm = &tegra_gart_pm_ops,
.of_match_table = tegra_gart_of_match,
.suppress_bind_attrs = true,
},
};
static int tegra_gart_init(void)
static int __init tegra_gart_init(void)
{
return platform_driver_register(&tegra_gart_driver);
}
static void __exit tegra_gart_exit(void)
{
platform_driver_unregister(&tegra_gart_driver);
}
subsys_initcall(tegra_gart_init);
module_exit(tegra_gart_exit);
module_param(gart_debug, bool, 0644);
module_param(gart_debug, bool, 0644);
MODULE_PARM_DESC(gart_debug, "Enable GART debugging");
MODULE_DESCRIPTION("IOMMU API for GART in Tegra20");
MODULE_AUTHOR("Hiroshi DOYU <hdoyu@nvidia.com>");
MODULE_ALIAS("platform:tegra-gart");
MODULE_LICENSE("GPL v2");

26
drivers/iommu/tegra-smmu.c
View File

@ -846,7 +846,7 @@ static struct iommu_group *tegra_smmu_group_get(struct tegra_smmu *smmu,
static struct iommu_group *tegra_smmu_device_group(struct device *dev)
{
struct iommu_fwspec *fwspec = dev->iommu_fwspec;
struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev);
struct tegra_smmu *smmu = dev->archdata.iommu;
struct iommu_group *group;
@ -926,17 +926,7 @@ static int tegra_smmu_swgroups_show(struct seq_file *s, void *data)
return 0;
}
static int tegra_smmu_swgroups_open(struct inode *inode, struct file *file)
{
return single_open(file, tegra_smmu_swgroups_show, inode->i_private);
}
static const struct file_operations tegra_smmu_swgroups_fops = {
.open = tegra_smmu_swgroups_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(tegra_smmu_swgroups);
static int tegra_smmu_clients_show(struct seq_file *s, void *data)
{
@ -964,17 +954,7 @@ static int tegra_smmu_clients_show(struct seq_file *s, void *data)
return 0;
}
static int tegra_smmu_clients_open(struct inode *inode, struct file *file)
{
return single_open(file, tegra_smmu_clients_show, inode->i_private);
}
static const struct file_operations tegra_smmu_clients_fops = {
.open = tegra_smmu_clients_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
DEFINE_SHOW_ATTRIBUTE(tegra_smmu_clients);
static void tegra_smmu_debugfs_init(struct tegra_smmu *smmu)
{

2
drivers/misc/mic/scif/scif_rma.c
View File

@ -15,7 +15,7 @@
* Intel SCIF driver.
*
*/
#include <linux/dma_remapping.h>
#include <linux/intel-iommu.h>
#include <linux/pagemap.h>
#include <linux/sched/mm.h>
#include <linux/sched/signal.h>

2
drivers/misc/mic/scif/scif_rma.h
View File

@ -53,7 +53,7 @@
#ifndef SCIF_RMA_H
#define SCIF_RMA_H
#include <linux/dma_remapping.h>
#include <linux/intel-iommu.h>
#include <linux/mmu_notifier.h>
#include "../bus/scif_bus.h"

2
drivers/usb/host/xhci.c
View File

@ -245,7 +245,7 @@ static void xhci_zero_64b_regs(struct xhci_hcd *xhci)
* an iommu. Doing anything when there is no iommu is definitely
* unsafe...
*/
if (!(xhci->quirks & XHCI_ZERO_64B_REGS) || !dev->iommu_group)
if (!(xhci->quirks & XHCI_ZERO_64B_REGS) || !device_iommu_mapped(dev))
return;
xhci_info(xhci, "Zeroing 64bit base registers, expecting fault\n");

31
drivers/vfio/vfio_iommu_type1.c
View File

@ -978,32 +978,6 @@ unlock:
return ret;
}
/*
* Turns out AMD IOMMU has a page table bug where it won't map large pages
* to a region that previously mapped smaller pages. This should be fixed
* soon, so this is just a temporary workaround to break mappings down into
* PAGE_SIZE. Better to map smaller pages than nothing.
*/
static int map_try_harder(struct vfio_domain *domain, dma_addr_t iova,
unsigned long pfn, long npage, int prot)
{
long i;
int ret = 0;
for (i = 0; i < npage; i++, pfn++, iova += PAGE_SIZE) {
ret = iommu_map(domain->domain, iova,
(phys_addr_t)pfn << PAGE_SHIFT,
PAGE_SIZE, prot | domain->prot);
if (ret)
break;
}
for (; i < npage && i > 0; i--, iova -= PAGE_SIZE)
iommu_unmap(domain->domain, iova, PAGE_SIZE);
return ret;
}
static int vfio_iommu_map(struct vfio_iommu *iommu, dma_addr_t iova,
unsigned long pfn, long npage, int prot)
{
@ -1013,11 +987,8 @@ static int vfio_iommu_map(struct vfio_iommu *iommu, dma_addr_t iova,
list_for_each_entry(d, &iommu->domain_list, next) {
ret = iommu_map(d->domain, iova, (phys_addr_t)pfn << PAGE_SHIFT,
npage << PAGE_SHIFT, prot | d->prot);
if (ret) {
if (ret != -EBUSY ||
map_try_harder(d, iova, pfn, npage, prot))
if (ret)
goto unwind;
}
cond_resched();
}

10
include/linux/device.h
View File

@ -1058,6 +1058,16 @@ static inline struct device *kobj_to_dev(struct kobject *kobj)
return container_of(kobj, struct device, kobj);
}
/**
* device_iommu_mapped - Returns true when the device DMA is translated
* by an IOMMU
* @dev: Device to perform the check on
*/
static inline bool device_iommu_mapped(struct device *dev)
{
return (dev->iommu_group != NULL);
}
/* Get the wakeup routines, which depend on struct device */
#include <linux/pm_wakeup.h>

58
include/linux/dma_remapping.h
View File

@ -1,58 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _DMA_REMAPPING_H
#define _DMA_REMAPPING_H
/*
* VT-d hardware uses 4KiB page size regardless of host page size.
*/
#define VTD_PAGE_SHIFT (12)
#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT)
#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT)
#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK)
#define VTD_STRIDE_SHIFT (9)
#define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT)
#define DMA_PTE_READ (1)
#define DMA_PTE_WRITE (2)
#define DMA_PTE_LARGE_PAGE (1 << 7)
#define DMA_PTE_SNP (1 << 11)
#define CONTEXT_TT_MULTI_LEVEL 0
#define CONTEXT_TT_DEV_IOTLB 1
#define CONTEXT_TT_PASS_THROUGH 2
/* Extended context entry types */
#define CONTEXT_TT_PT_PASID 4
#define CONTEXT_TT_PT_PASID_DEV_IOTLB 5
#define CONTEXT_TT_MASK (7ULL << 2)
#define CONTEXT_DINVE (1ULL << 8)
#define CONTEXT_PRS (1ULL << 9)
#define CONTEXT_PASIDE (1ULL << 11)
struct intel_iommu;
struct dmar_domain;
struct root_entry;
#ifdef CONFIG_INTEL_IOMMU
extern int iommu_calculate_agaw(struct intel_iommu *iommu);
extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
extern int dmar_disabled;
extern int intel_iommu_enabled;
extern int intel_iommu_tboot_noforce;
#else
static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
{
return 0;
}
static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
{
return 0;
}
#define dmar_disabled (1)
#define intel_iommu_enabled (0)
#endif
#endif

108
include/linux/intel-iommu.h
View File

@ -26,7 +26,6 @@
#include <linux/iova.h>
#include <linux/io.h>
#include <linux/idr.h>
#include <linux/dma_remapping.h>
#include <linux/mmu_notifier.h>
#include <linux/list.h>
#include <linux/iommu.h>
@ -36,10 +35,30 @@
#include <asm/cacheflush.h>
#include <asm/iommu.h>
/*
* VT-d hardware uses 4KiB page size regardless of host page size.
*/
#define VTD_PAGE_SHIFT (12)
#define VTD_PAGE_SIZE (1UL << VTD_PAGE_SHIFT)
#define VTD_PAGE_MASK (((u64)-1) << VTD_PAGE_SHIFT)
#define VTD_PAGE_ALIGN(addr) (((addr) + VTD_PAGE_SIZE - 1) & VTD_PAGE_MASK)
#define VTD_STRIDE_SHIFT (9)
#define VTD_STRIDE_MASK (((u64)-1) << VTD_STRIDE_SHIFT)
#define DMA_PTE_READ (1)
#define DMA_PTE_WRITE (2)
#define DMA_PTE_LARGE_PAGE (1 << 7)
#define DMA_PTE_SNP (1 << 11)
#define CONTEXT_TT_MULTI_LEVEL 0
#define CONTEXT_TT_DEV_IOTLB 1
#define CONTEXT_TT_PASS_THROUGH 2
#define CONTEXT_PASIDE BIT_ULL(3)
/*
* Intel IOMMU register specification per version 1.0 public spec.
*/
#define DMAR_VER_REG 0x0 /* Arch version supported by this IOMMU */
#define DMAR_CAP_REG 0x8 /* Hardware supported capabilities */
#define DMAR_ECAP_REG 0x10 /* Extended capabilities supported */
@ -151,6 +170,10 @@
* Extended Capability Register
*/
#define ecap_smpwc(e) (((e) >> 48) & 0x1)
#define ecap_flts(e) (((e) >> 47) & 0x1)
#define ecap_slts(e) (((e) >> 46) & 0x1)
#define ecap_smts(e) (((e) >> 43) & 0x1)
#define ecap_dit(e) ((e >> 41) & 0x1)
#define ecap_pasid(e) ((e >> 40) & 0x1)
#define ecap_pss(e) ((e >> 35) & 0x1f)
@ -229,6 +252,7 @@
/* DMA_RTADDR_REG */
#define DMA_RTADDR_RTT (((u64)1) << 11)
#define DMA_RTADDR_SMT (((u64)1) << 10)
/* CCMD_REG */
#define DMA_CCMD_ICC (((u64)1) << 63)
@ -374,13 +398,18 @@ enum {
#define QI_GRAN_NONG_PASID 2
#define QI_GRAN_PSI_PASID 3
#define qi_shift(iommu) (DMAR_IQ_SHIFT + !!ecap_smts((iommu)->ecap))
struct qi_desc {
u64 low, high;
u64 qw0;
u64 qw1;
u64 qw2;
u64 qw3;
};
struct q_inval {
raw_spinlock_t q_lock;
struct qi_desc *desc; /* invalidation queue */
void *desc; /* invalidation queue */
int *desc_status; /* desc status */
int free_head; /* first free entry */
int free_tail; /* last free entry */
@ -512,15 +541,8 @@ struct intel_iommu {
struct iommu_flush flush;
#endif
#ifdef CONFIG_INTEL_IOMMU_SVM
/* These are large and need to be contiguous, so we allocate just
* one for now. We'll maybe want to rethink that if we truly give
* devices away to userspace processes (e.g. for DPDK) and don't
* want to trust that userspace will use *only* the PASID it was
* told to. But while it's all driver-arbitrated, we're fine. */
struct pasid_state_entry *pasid_state_table;
struct page_req_dsc *prq;
unsigned char prq_name[16]; /* Name for PRQ interrupt */
u32 pasid_max;
#endif
struct q_inval *qi; /* Queued invalidation info */
u32 *iommu_state; /* Store iommu states between suspend and resume.*/
@ -563,6 +585,49 @@ static inline void __iommu_flush_cache(
clflush_cache_range(addr, size);
}
/*
* 0: readable
* 1: writable
* 2-6: reserved
* 7: super page
* 8-10: available
* 11: snoop behavior
* 12-63: Host physcial address
*/
struct dma_pte {
u64 val;
};
static inline void dma_clear_pte(struct dma_pte *pte)
{
pte->val = 0;
}
static inline u64 dma_pte_addr(struct dma_pte *pte)
{
#ifdef CONFIG_64BIT
return pte->val & VTD_PAGE_MASK;
#else
/* Must have a full atomic 64-bit read */
return __cmpxchg64(&pte->val, 0ULL, 0ULL) & VTD_PAGE_MASK;
#endif
}
static inline bool dma_pte_present(struct dma_pte *pte)
{
return (pte->val & 3) != 0;
}
static inline bool dma_pte_superpage(struct dma_pte *pte)
{
return (pte->val & DMA_PTE_LARGE_PAGE);
}
static inline int first_pte_in_page(struct dma_pte *pte)
{
return !((unsigned long)pte & ~VTD_PAGE_MASK);
}
extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
extern int dmar_find_matched_atsr_unit(struct pci_dev *dev);
@ -587,10 +652,10 @@ void free_pgtable_page(void *vaddr);
struct intel_iommu *domain_get_iommu(struct dmar_domain *domain);
int for_each_device_domain(int (*fn)(struct device_domain_info *info,
void *data), void *data);
void iommu_flush_write_buffer(struct intel_iommu *iommu);
#ifdef CONFIG_INTEL_IOMMU_SVM
int intel_svm_init(struct intel_iommu *iommu);
int intel_svm_exit(struct intel_iommu *iommu);
extern int intel_svm_enable_prq(struct intel_iommu *iommu);
extern int intel_svm_finish_prq(struct intel_iommu *iommu);
@ -632,4 +697,23 @@ bool context_present(struct context_entry *context);
struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
u8 devfn, int alloc);
#ifdef CONFIG_INTEL_IOMMU
extern int iommu_calculate_agaw(struct intel_iommu *iommu);
extern int iommu_calculate_max_sagaw(struct intel_iommu *iommu);
extern int dmar_disabled;
extern int intel_iommu_enabled;
extern int intel_iommu_tboot_noforce;
#else
static inline int iommu_calculate_agaw(struct intel_iommu *iommu)
{
return 0;
}
static inline int iommu_calculate_max_sagaw(struct intel_iommu *iommu)
{
return 0;
}
#define dmar_disabled (1)
#define intel_iommu_enabled (0)
#endif
#endif

18
include/linux/iommu.h
View File

@ -168,8 +168,8 @@ struct iommu_resv_region {
* @map: map a physically contiguous memory region to an iommu domain
* @unmap: unmap a physically contiguous memory region from an iommu domain
* @flush_tlb_all: Synchronously flush all hardware TLBs for this domain
* @tlb_range_add: Add a given iova range to the flush queue for this domain
* @tlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
* @iotlb_range_add: Add a given iova range to the flush queue for this domain
* @iotlb_sync: Flush all queued ranges from the hardware TLBs and empty flush
* queue
* @iova_to_phys: translate iova to physical address
* @add_device: add device to iommu grouping
@ -398,6 +398,20 @@ void iommu_fwspec_free(struct device *dev);
int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
static inline struct iommu_fwspec *dev_iommu_fwspec_get(struct device *dev)
{
return dev->iommu_fwspec;
}
static inline void dev_iommu_fwspec_set(struct device *dev,
struct iommu_fwspec *fwspec)
{
dev->iommu_fwspec = fwspec;
}
int iommu_probe_device(struct device *dev);
void iommu_release_device(struct device *dev);
#else /* CONFIG_IOMMU_API */
struct iommu_ops {};