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IOMMU Upates for Linux v3.15

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This time a few more updates queued up.
 
 	* Rework VT-d code to support ACPI devices
 
 	* Improvements for memory and PCI hotplug support
 	  in the VT-d driver
 
 	* Device-tree support for OMAP IOMMU
 
 	* Convert OMAP IOMMU to use devm_* interfaces
 
 	* Fixed PASID support for AMD IOMMU
 
 	* Other random cleanups and fixes for OMAP, ARM-SMMU
 	  and SHMOBILE IOMMU
 
 Most of the changes are in the VT-d driver because some rework was
 necessary for better hotplug and ACPI device support.
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Merge tag 'iommu-updates-v3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU upates from Joerg Roedel:
 "This time a few more updates queued up.

   - Rework VT-d code to support ACPI devices

   - Improvements for memory and PCI hotplug support in the VT-d driver

   - Device-tree support for OMAP IOMMU

   - Convert OMAP IOMMU to use devm_* interfaces

   - Fixed PASID support for AMD IOMMU

   - Other random cleanups and fixes for OMAP, ARM-SMMU and SHMOBILE
     IOMMU

  Most of the changes are in the VT-d driver because some rework was
  necessary for better hotplug and ACPI device support"

* tag 'iommu-updates-v3.15' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu: (75 commits)
  iommu/vt-d: Fix error handling in ANDD processing
  iommu/vt-d: returning free pointer in get_domain_for_dev()
  iommu/vt-d: Only call dmar_acpi_dev_scope_init() if DRHD units present
  iommu/vt-d: Check for NULL pointer in dmar_acpi_dev_scope_init()
  iommu/amd: Fix logic to determine and checking max PASID
  iommu/vt-d: Include ACPI devices in iommu=pt
  iommu/vt-d: Finally enable translation for non-PCI devices
  iommu/vt-d: Remove to_pci_dev() in intel_map_page()
  iommu/vt-d: Remove pdev from intel_iommu_attach_device()
  iommu/vt-d: Remove pdev from iommu_no_mapping()
  iommu/vt-d: Make domain_add_dev_info() take struct device
  iommu/vt-d: Make domain_remove_one_dev_info() take struct device
  iommu/vt-d: Rename 'hwdev' variables to 'dev' now that that's the norm
  iommu/vt-d: Remove some pointless to_pci_dev() calls
  iommu/vt-d: Make get_valid_domain_for_dev() take struct device
  iommu/vt-d: Make iommu_should_identity_map() take struct device
  iommu/vt-d: Handle RMRRs for non-PCI devices
  iommu/vt-d: Make get_domain_for_dev() take struct device
  iommu/vt-d: Make domain_context_mapp{ed,ing}() take struct device
  iommu/vt-d: Make device_to_iommu() cope with non-PCI devices
  ...
This commit is contained in:
Linus Torvalds 2014-04-05 18:46:26 -07:00
commit 3f583bc219
19 changed files with 1767 additions and 1003 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/devicetree/bindings/iommu/arm,smmu.txt
View File

@ -48,6 +48,12 @@ conditions.
from the mmu-masters towards memory) node for this
SMMU.
- calxeda,smmu-secure-config-access : Enable proper handling of buggy
implementations that always use secure access to
SMMU configuration registers. In this case non-secure
aliases of secure registers have to be used during
SMMU configuration.
Example:
smmu {

26
Documentation/devicetree/bindings/iommu/ti,omap-iommu.txt Normal file
View File

@ -0,0 +1,26 @@
OMAP2+ IOMMU
Required properties:
- compatible : Should be one of,
"ti,omap2-iommu" for OMAP2/OMAP3 IOMMU instances
"ti,omap4-iommu" for OMAP4/OMAP5 IOMMU instances
"ti,dra7-iommu" for DRA7xx IOMMU instances
- ti,hwmods : Name of the hwmod associated with the IOMMU instance
- reg : Address space for the configuration registers
- interrupts : Interrupt specifier for the IOMMU instance
Optional properties:
- ti,#tlb-entries : Number of entries in the translation look-aside buffer.
Should be either 8 or 32 (default: 32)
- ti,iommu-bus-err-back : Indicates the IOMMU instance supports throwing
back a bus error response on MMU faults.
Example:
/* OMAP3 ISP MMU */
mmu_isp: mmu@480bd400 {
compatible = "ti,omap2-iommu";
reg = <0x480bd400 0x80>;
interrupts = <24>;
ti,hwmods = "mmu_isp";
ti,#tlb-entries = <8>;
};

5
arch/arm/mach-omap2/omap-iommu.c
View File

@ -10,6 +10,7 @@
* published by the Free Software Foundation.
*/
#include <linux/of.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
@ -58,6 +59,10 @@ static int __init omap_iommu_dev_init(struct omap_hwmod *oh, void *unused)
static int __init omap_iommu_init(void)
{
/* If dtb is there, the devices will be created dynamically */
if (of_have_populated_dt())
return -ENODEV;
return omap_hwmod_for_each_by_class("mmu", omap_iommu_dev_init, NULL);
}
/* must be ready before omap3isp is probed */

2
drivers/iommu/Kconfig
View File

@ -207,7 +207,7 @@ config SHMOBILE_IOMMU
bool "IOMMU for Renesas IPMMU/IPMMUI"
default n
depends on ARM
depends on SH_MOBILE || COMPILE_TEST
depends on ARCH_SHMOBILE || COMPILE_TEST
select IOMMU_API
select ARM_DMA_USE_IOMMU
select SHMOBILE_IPMMU

8
drivers/iommu/amd_iommu.c
View File

@ -963,7 +963,7 @@ static void build_inv_iommu_pasid(struct iommu_cmd *cmd, u16 domid, int pasid,
address &= ~(0xfffULL);
cmd->data[0] = pasid & PASID_MASK;
cmd->data[0] = pasid;
cmd->data[1] = domid;
cmd->data[2] = lower_32_bits(address);
cmd->data[3] = upper_32_bits(address);
@ -982,10 +982,10 @@ static void build_inv_iotlb_pasid(struct iommu_cmd *cmd, u16 devid, int pasid,
address &= ~(0xfffULL);
cmd->data[0] = devid;
cmd->data[0] |= (pasid & 0xff) << 16;
cmd->data[0] |= ((pasid >> 8) & 0xff) << 16;
cmd->data[0] |= (qdep & 0xff) << 24;
cmd->data[1] = devid;
cmd->data[1] |= ((pasid >> 8) & 0xfff) << 16;
cmd->data[1] |= (pasid & 0xff) << 16;
cmd->data[2] = lower_32_bits(address);
cmd->data[2] |= CMD_INV_IOMMU_PAGES_GN_MASK;
cmd->data[3] = upper_32_bits(address);
@ -1001,7 +1001,7 @@ static void build_complete_ppr(struct iommu_cmd *cmd, u16 devid, int pasid,
cmd->data[0] = devid;
if (gn) {
cmd->data[1] = pasid & PASID_MASK;
cmd->data[1] = pasid;
cmd->data[2] = CMD_INV_IOMMU_PAGES_GN_MASK;
}
cmd->data[3] = tag & 0x1ff;

16
drivers/iommu/amd_iommu_init.c
View File

@ -150,7 +150,7 @@ int amd_iommus_present;
bool amd_iommu_np_cache __read_mostly;
bool amd_iommu_iotlb_sup __read_mostly = true;
u32 amd_iommu_max_pasids __read_mostly = ~0;
u32 amd_iommu_max_pasid __read_mostly = ~0;
bool amd_iommu_v2_present __read_mostly;
bool amd_iommu_pc_present __read_mostly;
@ -1231,14 +1231,16 @@ static int iommu_init_pci(struct amd_iommu *iommu)
if (iommu_feature(iommu, FEATURE_GT)) {
int glxval;
u32 pasids;
u64 shift;
u32 max_pasid;
u64 pasmax;
shift = iommu->features & FEATURE_PASID_MASK;
shift >>= FEATURE_PASID_SHIFT;
pasids = (1 << shift);
pasmax = iommu->features & FEATURE_PASID_MASK;
pasmax >>= FEATURE_PASID_SHIFT;
max_pasid = (1 << (pasmax + 1)) - 1;
amd_iommu_max_pasids = min(amd_iommu_max_pasids, pasids);
amd_iommu_max_pasid = min(amd_iommu_max_pasid, max_pasid);
BUG_ON(amd_iommu_max_pasid & ~PASID_MASK);
glxval = iommu->features & FEATURE_GLXVAL_MASK;
glxval >>= FEATURE_GLXVAL_SHIFT;

11
drivers/iommu/amd_iommu_types.h
View File

@ -99,7 +99,12 @@
#define FEATURE_GLXVAL_SHIFT 14
#define FEATURE_GLXVAL_MASK (0x03ULL << FEATURE_GLXVAL_SHIFT)
#define PASID_MASK 0x000fffff
/* Note:
* The current driver only support 16-bit PASID.
* Currently, hardware only implement upto 16-bit PASID
* even though the spec says it could have upto 20 bits.
*/
#define PASID_MASK 0x0000ffff
/* MMIO status bits */
#define MMIO_STATUS_EVT_INT_MASK (1 << 1)
@ -697,8 +702,8 @@ extern unsigned long *amd_iommu_pd_alloc_bitmap;
*/
extern u32 amd_iommu_unmap_flush;
/* Smallest number of PASIDs supported by any IOMMU in the system */
extern u32 amd_iommu_max_pasids;
/* Smallest max PASID supported by any IOMMU in the system */
extern u32 amd_iommu_max_pasid;
extern bool amd_iommu_v2_present;

105
drivers/iommu/arm-smmu.c
View File

@ -48,7 +48,7 @@
#include <asm/pgalloc.h>
/* Maximum number of stream IDs assigned to a single device */
#define MAX_MASTER_STREAMIDS 8
#define MAX_MASTER_STREAMIDS MAX_PHANDLE_ARGS
/* Maximum number of context banks per SMMU */
#define ARM_SMMU_MAX_CBS 128
@ -60,6 +60,16 @@
#define ARM_SMMU_GR0(smmu) ((smmu)->base)
#define ARM_SMMU_GR1(smmu) ((smmu)->base + (smmu)->pagesize)
/*
* SMMU global address space with conditional offset to access secure
* aliases of non-secure registers (e.g. nsCR0: 0x400, nsGFSR: 0x448,
* nsGFSYNR0: 0x450)
*/
#define ARM_SMMU_GR0_NS(smmu) \
((smmu)->base + \
((smmu->options & ARM_SMMU_OPT_SECURE_CFG_ACCESS) \
? 0x400 : 0))
/* Page table bits */
#define ARM_SMMU_PTE_XN (((pteval_t)3) << 53)
#define ARM_SMMU_PTE_CONT (((pteval_t)1) << 52)
@ -351,6 +361,9 @@ struct arm_smmu_device {
#define ARM_SMMU_FEAT_TRANS_S2 (1 << 3)
#define ARM_SMMU_FEAT_TRANS_NESTED (1 << 4)
u32 features;
#define ARM_SMMU_OPT_SECURE_CFG_ACCESS (1 << 0)
u32 options;
int version;
u32 num_context_banks;
@ -401,6 +414,29 @@ struct arm_smmu_domain {
static DEFINE_SPINLOCK(arm_smmu_devices_lock);
static LIST_HEAD(arm_smmu_devices);
struct arm_smmu_option_prop {
u32 opt;
const char *prop;
};
static struct arm_smmu_option_prop arm_smmu_options [] = {
{ ARM_SMMU_OPT_SECURE_CFG_ACCESS, "calxeda,smmu-secure-config-access" },
{ 0, NULL},
};
static void parse_driver_options(struct arm_smmu_device *smmu)
{
int i = 0;
do {
if (of_property_read_bool(smmu->dev->of_node,
arm_smmu_options[i].prop)) {
smmu->options |= arm_smmu_options[i].opt;
dev_notice(smmu->dev, "option %s\n",
arm_smmu_options[i].prop);
}
} while (arm_smmu_options[++i].opt);
}
static struct arm_smmu_master *find_smmu_master(struct arm_smmu_device *smmu,
struct device_node *dev_node)
{
@ -614,16 +650,16 @@ static irqreturn_t arm_smmu_global_fault(int irq, void *dev)
{
u32 gfsr, gfsynr0, gfsynr1, gfsynr2;
struct arm_smmu_device *smmu = dev;
void __iomem *gr0_base = ARM_SMMU_GR0(smmu);
void __iomem *gr0_base = ARM_SMMU_GR0_NS(smmu);
gfsr = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSR);
if (!gfsr)
return IRQ_NONE;
gfsynr0 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR0);
gfsynr1 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR1);
gfsynr2 = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSYNR2);
if (!gfsr)
return IRQ_NONE;
dev_err_ratelimited(smmu->dev,
"Unexpected global fault, this could be serious\n");
dev_err_ratelimited(smmu->dev,
@ -642,7 +678,7 @@ static void arm_smmu_flush_pgtable(struct arm_smmu_device *smmu, void *addr,
/* Ensure new page tables are visible to the hardware walker */
if (smmu->features & ARM_SMMU_FEAT_COHERENT_WALK) {
dsb();
dsb(ishst);
} else {
/*
* If the SMMU can't walk tables in the CPU caches, treat them
@ -990,9 +1026,8 @@ static void arm_smmu_free_pgtables(struct arm_smmu_domain *smmu_domain)
/*
* Recursively free the page tables for this domain. We don't
* care about speculative TLB filling, because the TLB will be
* nuked next time this context bank is re-allocated and no devices
* currently map to these tables.
* care about speculative TLB filling because the tables should
* not be active in any context bank at this point (SCTLR.M is 0).
*/
pgd = pgd_base;
for (i = 0; i < PTRS_PER_PGD; ++i) {
@ -1218,7 +1253,7 @@ static bool arm_smmu_pte_is_contiguous_range(unsigned long addr,
static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
unsigned long addr, unsigned long end,
unsigned long pfn, int flags, int stage)
unsigned long pfn, int prot, int stage)
{
pte_t *pte, *start;
pteval_t pteval = ARM_SMMU_PTE_PAGE | ARM_SMMU_PTE_AF | ARM_SMMU_PTE_XN;
@ -1240,28 +1275,28 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
if (stage == 1) {
pteval |= ARM_SMMU_PTE_AP_UNPRIV | ARM_SMMU_PTE_nG;
if (!(flags & IOMMU_WRITE) && (flags & IOMMU_READ))
if (!(prot & IOMMU_WRITE) && (prot & IOMMU_READ))
pteval |= ARM_SMMU_PTE_AP_RDONLY;
if (flags & IOMMU_CACHE)
if (prot & IOMMU_CACHE)
pteval |= (MAIR_ATTR_IDX_CACHE <<
ARM_SMMU_PTE_ATTRINDX_SHIFT);
} else {
pteval |= ARM_SMMU_PTE_HAP_FAULT;
if (flags & IOMMU_READ)
if (prot & IOMMU_READ)
pteval |= ARM_SMMU_PTE_HAP_READ;
if (flags & IOMMU_WRITE)
if (prot & IOMMU_WRITE)
pteval |= ARM_SMMU_PTE_HAP_WRITE;
if (flags & IOMMU_CACHE)
if (prot & IOMMU_CACHE)
pteval |= ARM_SMMU_PTE_MEMATTR_OIWB;
else
pteval |= ARM_SMMU_PTE_MEMATTR_NC;
}
/* If no access, create a faulting entry to avoid TLB fills */
if (flags & IOMMU_EXEC)
if (prot & IOMMU_EXEC)
pteval &= ~ARM_SMMU_PTE_XN;
else if (!(flags & (IOMMU_READ | IOMMU_WRITE)))
else if (!(prot & (IOMMU_READ | IOMMU_WRITE)))
pteval &= ~ARM_SMMU_PTE_PAGE;
pteval |= ARM_SMMU_PTE_SH_IS;
@ -1323,7 +1358,7 @@ static int arm_smmu_alloc_init_pte(struct arm_smmu_device *smmu, pmd_t *pmd,
static int arm_smmu_alloc_init_pmd(struct arm_smmu_device *smmu, pud_t *pud,
unsigned long addr, unsigned long end,
phys_addr_t phys, int flags, int stage)
phys_addr_t phys, int prot, int stage)
{
int ret;
pmd_t *pmd;
@ -1347,7 +1382,7 @@ static int arm_smmu_alloc_init_pmd(struct arm_smmu_device *smmu, pud_t *pud,
do {
next = pmd_addr_end(addr, end);
ret = arm_smmu_alloc_init_pte(smmu, pmd, addr, end, pfn,
flags, stage);
prot, stage);
phys += next - addr;
} while (pmd++, addr = next, addr < end);
@ -1356,7 +1391,7 @@ static int arm_smmu_alloc_init_pmd(struct arm_smmu_device *smmu, pud_t *pud,
static int arm_smmu_alloc_init_pud(struct arm_smmu_device *smmu, pgd_t *pgd,
unsigned long addr, unsigned long end,
phys_addr_t phys, int flags, int stage)
phys_addr_t phys, int prot, int stage)
{
int ret = 0;
pud_t *pud;
@ -1380,7 +1415,7 @@ static int arm_smmu_alloc_init_pud(struct arm_smmu_device *smmu, pgd_t *pgd,
do {
next = pud_addr_end(addr, end);
ret = arm_smmu_alloc_init_pmd(smmu, pud, addr, next, phys,
flags, stage);
prot, stage);
phys += next - addr;
} while (pud++, addr = next, addr < end);
@ -1389,7 +1424,7 @@ static int arm_smmu_alloc_init_pud(struct arm_smmu_device *smmu, pgd_t *pgd,
static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
unsigned long iova, phys_addr_t paddr,
size_t size, int flags)
size_t size, int prot)
{
int ret, stage;
unsigned long end;
@ -1397,7 +1432,7 @@ static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
struct arm_smmu_cfg *root_cfg = &smmu_domain->root_cfg;
pgd_t *pgd = root_cfg->pgd;
struct arm_smmu_device *smmu = root_cfg->smmu;
unsigned long irqflags;
unsigned long flags;
if (root_cfg->cbar == CBAR_TYPE_S2_TRANS) {
stage = 2;
@ -1420,14 +1455,14 @@ static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
if (paddr & ~output_mask)
return -ERANGE;
spin_lock_irqsave(&smmu_domain->lock, irqflags);
spin_lock_irqsave(&smmu_domain->lock, flags);
pgd += pgd_index(iova);
end = iova + size;
do {
unsigned long next = pgd_addr_end(iova, end);
ret = arm_smmu_alloc_init_pud(smmu, pgd, iova, next, paddr,
flags, stage);
prot, stage);
if (ret)
goto out_unlock;
@ -1436,13 +1471,13 @@ static int arm_smmu_handle_mapping(struct arm_smmu_domain *smmu_domain,
} while (pgd++, iova != end);
out_unlock:
spin_unlock_irqrestore(&smmu_domain->lock, irqflags);
spin_unlock_irqrestore(&smmu_domain->lock, flags);
return ret;
}
static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int flags)
phys_addr_t paddr, size_t size, int prot)
{
struct arm_smmu_domain *smmu_domain = domain->priv;
@ -1453,7 +1488,7 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova,
if ((phys_addr_t)iova & ~smmu_domain->output_mask)
return -ERANGE;
return arm_smmu_handle_mapping(smmu_domain, iova, paddr, size, flags);
return arm_smmu_handle_mapping(smmu_domain, iova, paddr, size, prot);
}
static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
@ -1597,9 +1632,9 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
int i = 0;
u32 reg;
/* Clear Global FSR */
reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_sGFSR);
writel(reg, gr0_base + ARM_SMMU_GR0_sGFSR);
/* clear global FSR */
reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sGFSR);
writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sGFSR);
/* Mark all SMRn as invalid and all S2CRn as bypass */
for (i = 0; i < smmu->num_mapping_groups; ++i) {
@ -1619,7 +1654,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
writel_relaxed(0, gr0_base + ARM_SMMU_GR0_TLBIALLH);
writel_relaxed(0, gr0_base + ARM_SMMU_GR0_TLBIALLNSNH);
reg = readl_relaxed(gr0_base + ARM_SMMU_GR0_sCR0);
reg = readl_relaxed(ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
/* Enable fault reporting */
reg |= (sCR0_GFRE | sCR0_GFIE | sCR0_GCFGFRE | sCR0_GCFGFIE);
@ -1638,7 +1673,7 @@ static void arm_smmu_device_reset(struct arm_smmu_device *smmu)
/* Push the button */
arm_smmu_tlb_sync(smmu);
writel_relaxed(reg, gr0_base + ARM_SMMU_GR0_sCR0);
writel(reg, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
}
static int arm_smmu_id_size_to_bits(int size)
@ -1885,6 +1920,8 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev)
if (err)
goto out_put_parent;
parse_driver_options(smmu);
if (smmu->version > 1 &&
smmu->num_context_banks != smmu->num_context_irqs) {
dev_err(dev,
@ -1969,7 +2006,7 @@ static int arm_smmu_device_remove(struct platform_device *pdev)
free_irq(smmu->irqs[i], smmu);
/* Turn the thing off */
writel_relaxed(sCR0_CLIENTPD, ARM_SMMU_GR0(smmu) + ARM_SMMU_GR0_sCR0);
writel(sCR0_CLIENTPD,ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0);
return 0;
}

515
drivers/iommu/dmar.c
View File

@ -43,14 +43,24 @@
#include "irq_remapping.h"
/* No locks are needed as DMA remapping hardware unit
* list is constructed at boot time and hotplug of
* these units are not supported by the architecture.
/*
* Assumptions:
* 1) The hotplug framework guarentees that DMAR unit will be hot-added
* before IO devices managed by that unit.
* 2) The hotplug framework guarantees that DMAR unit will be hot-removed
* after IO devices managed by that unit.
* 3) Hotplug events are rare.
*
* Locking rules for DMA and interrupt remapping related global data structures:
* 1) Use dmar_global_lock in process context
* 2) Use RCU in interrupt context
*/
DECLARE_RWSEM(dmar_global_lock);
LIST_HEAD(dmar_drhd_units);
struct acpi_table_header * __initdata dmar_tbl;
static acpi_size dmar_tbl_size;
static int dmar_dev_scope_status = 1;
static int alloc_iommu(struct dmar_drhd_unit *drhd);
static void free_iommu(struct intel_iommu *iommu);
@ -62,73 +72,20 @@ static void __init dmar_register_drhd_unit(struct dmar_drhd_unit *drhd)
* the very end.
*/
if (drhd->include_all)
list_add_tail(&drhd->list, &dmar_drhd_units);
list_add_tail_rcu(&drhd->list, &dmar_drhd_units);
else
list_add(&drhd->list, &dmar_drhd_units);
list_add_rcu(&drhd->list, &dmar_drhd_units);
}
static int __init dmar_parse_one_dev_scope(struct acpi_dmar_device_scope *scope,
struct pci_dev **dev, u16 segment)
{
struct pci_bus *bus;
struct pci_dev *pdev = NULL;
struct acpi_dmar_pci_path *path;
int count;
bus = pci_find_bus(segment, scope->bus);
path = (struct acpi_dmar_pci_path *)(scope + 1);
count = (scope->length - sizeof(struct acpi_dmar_device_scope))
/ sizeof(struct acpi_dmar_pci_path);
while (count) {
if (pdev)
pci_dev_put(pdev);
/*
* Some BIOSes list non-exist devices in DMAR table, just
* ignore it
*/
if (!bus) {
pr_warn("Device scope bus [%d] not found\n", scope->bus);
break;
}
pdev = pci_get_slot(bus, PCI_DEVFN(path->device, path->function));
if (!pdev) {
/* warning will be printed below */
break;
}
path ++;
count --;
bus = pdev->subordinate;
}
if (!pdev) {
pr_warn("Device scope device [%04x:%02x:%02x.%02x] not found\n",
segment, scope->bus, path->device, path->function);
return 0;
}
if ((scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT && \
pdev->subordinate) || (scope->entry_type == \
ACPI_DMAR_SCOPE_TYPE_BRIDGE && !pdev->subordinate)) {
pci_dev_put(pdev);
pr_warn("Device scope type does not match for %s\n",
pci_name(pdev));
return -EINVAL;
}
*dev = pdev;
return 0;
}
int __init dmar_parse_dev_scope(void *start, void *end, int *cnt,
struct pci_dev ***devices, u16 segment)
void *dmar_alloc_dev_scope(void *start, void *end, int *cnt)
{
struct acpi_dmar_device_scope *scope;
void * tmp = start;
int index;
int ret;
*cnt = 0;
while (start < end) {
scope = start;
if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT ||
if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ACPI ||
scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT ||
scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE)
(*cnt)++;
else if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_IOAPIC &&
@ -138,43 +95,236 @@ int __init dmar_parse_dev_scope(void *start, void *end, int *cnt,
start += scope->length;
}
if (*cnt == 0)
return NULL;
return kcalloc(*cnt, sizeof(struct dmar_dev_scope), GFP_KERNEL);
}
void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt)
{
int i;
struct device *tmp_dev;
if (*devices && *cnt) {
for_each_active_dev_scope(*devices, *cnt, i, tmp_dev)
put_device(tmp_dev);
kfree(*devices);
}
*devices = NULL;
*cnt = 0;
}
/* Optimize out kzalloc()/kfree() for normal cases */
static char dmar_pci_notify_info_buf[64];
static struct dmar_pci_notify_info *
dmar_alloc_pci_notify_info(struct pci_dev *dev, unsigned long event)
{
int level = 0;
size_t size;
struct pci_dev *tmp;
struct dmar_pci_notify_info *info;
BUG_ON(dev->is_virtfn);
/* Only generate path[] for device addition event */
if (event == BUS_NOTIFY_ADD_DEVICE)
for (tmp = dev; tmp; tmp = tmp->bus->self)
level++;
size = sizeof(*info) + level * sizeof(struct acpi_dmar_pci_path);
if (size <= sizeof(dmar_pci_notify_info_buf)) {
info = (struct dmar_pci_notify_info *)dmar_pci_notify_info_buf;
} else {
info = kzalloc(size, GFP_KERNEL);
if (!info) {
pr_warn("Out of memory when allocating notify_info "
"for %s.\n", pci_name(dev));
if (dmar_dev_scope_status == 0)
dmar_dev_scope_status = -ENOMEM;
return NULL;
}
}
info->event = event;
info->dev = dev;
info->seg = pci_domain_nr(dev->bus);
info->level = level;
if (event == BUS_NOTIFY_ADD_DEVICE) {
for (tmp = dev, level--; tmp; tmp = tmp->bus->self) {
info->path[level].device = PCI_SLOT(tmp->devfn);
info->path[level].function = PCI_FUNC(tmp->devfn);
if (pci_is_root_bus(tmp->bus))
info->bus = tmp->bus->number;
}
}
return info;
}
static inline void dmar_free_pci_notify_info(struct dmar_pci_notify_info *info)
{
if ((void *)info != dmar_pci_notify_info_buf)
kfree(info);
}
static bool dmar_match_pci_path(struct dmar_pci_notify_info *info, int bus,
struct acpi_dmar_pci_path *path, int count)
{
int i;
if (info->bus != bus)
return false;
if (info->level != count)
return false;
for (i = 0; i < count; i++) {
if (path[i].device != info->path[i].device ||
path[i].function != info->path[i].function)
return false;
}
return true;
}
/* Return: > 0 if match found, 0 if no match found, < 0 if error happens */
int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
void *start, void*end, u16 segment,
struct dmar_dev_scope *devices,
int devices_cnt)
{
int i, level;
struct device *tmp, *dev = &info->dev->dev;
struct acpi_dmar_device_scope *scope;
struct acpi_dmar_pci_path *path;
if (segment != info->seg)
return 0;
*devices = kcalloc(*cnt, sizeof(struct pci_dev *), GFP_KERNEL);
if (!*devices)
return -ENOMEM;
start = tmp;
index = 0;
while (start < end) {
for (; start < end; start += scope->length) {
scope = start;
if (scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT ||
scope->entry_type == ACPI_DMAR_SCOPE_TYPE_BRIDGE) {
ret = dmar_parse_one_dev_scope(scope,
&(*devices)[index], segment);
if (ret) {
dmar_free_dev_scope(devices, cnt);
return ret;
}
index ++;
if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_ENDPOINT &&
scope->entry_type != ACPI_DMAR_SCOPE_TYPE_BRIDGE)
continue;
path = (struct acpi_dmar_pci_path *)(scope + 1);
level = (scope->length - sizeof(*scope)) / sizeof(*path);
if (!dmar_match_pci_path(info, scope->bus, path, level))
continue;
if ((scope->entry_type == ACPI_DMAR_SCOPE_TYPE_ENDPOINT) ^
(info->dev->hdr_type == PCI_HEADER_TYPE_NORMAL)) {
pr_warn("Device scope type does not match for %s\n",
pci_name(info->dev));
return -EINVAL;
}
start += scope->length;
for_each_dev_scope(devices, devices_cnt, i, tmp)
if (tmp == NULL) {
devices[i].bus = info->dev->bus->number;
devices[i].devfn = info->dev->devfn;
rcu_assign_pointer(devices[i].dev,
get_device(dev));
return 1;
}
BUG_ON(i >= devices_cnt);
}
return 0;
}
void dmar_free_dev_scope(struct pci_dev ***devices, int *cnt)
int dmar_remove_dev_scope(struct dmar_pci_notify_info *info, u16 segment,
struct dmar_dev_scope *devices, int count)
{
if (*devices && *cnt) {
while (--*cnt >= 0)
pci_dev_put((*devices)[*cnt]);
kfree(*devices);
*devices = NULL;
*cnt = 0;
}
int index;
struct device *tmp;
if (info->seg != segment)
return 0;
for_each_active_dev_scope(devices, count, index, tmp)
if (tmp == &info->dev->dev) {
rcu_assign_pointer(devices[index].dev, NULL);
synchronize_rcu();
put_device(tmp);
return 1;
}
return 0;
}
static int dmar_pci_bus_add_dev(struct dmar_pci_notify_info *info)
{
int ret = 0;
struct dmar_drhd_unit *dmaru;
struct acpi_dmar_hardware_unit *drhd;
for_each_drhd_unit(dmaru) {
if (dmaru->include_all)
continue;
drhd = container_of(dmaru->hdr,
struct acpi_dmar_hardware_unit, header);
ret = dmar_insert_dev_scope(info, (void *)(drhd + 1),
((void *)drhd) + drhd->header.length,
dmaru->segment,
dmaru->devices, dmaru->devices_cnt);
if (ret != 0)
break;
}
if (ret >= 0)
ret = dmar_iommu_notify_scope_dev(info);
if (ret < 0 && dmar_dev_scope_status == 0)
dmar_dev_scope_status = ret;
return ret;
}
static void dmar_pci_bus_del_dev(struct dmar_pci_notify_info *info)
{
struct dmar_drhd_unit *dmaru;
for_each_drhd_unit(dmaru)
if (dmar_remove_dev_scope(info, dmaru->segment,
dmaru->devices, dmaru->devices_cnt))
break;
dmar_iommu_notify_scope_dev(info);
}
static int dmar_pci_bus_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct pci_dev *pdev = to_pci_dev(data);
struct dmar_pci_notify_info *info;
/* Only care about add/remove events for physical functions */
if (pdev->is_virtfn)
return NOTIFY_DONE;
if (action != BUS_NOTIFY_ADD_DEVICE && action != BUS_NOTIFY_DEL_DEVICE)
return NOTIFY_DONE;
info = dmar_alloc_pci_notify_info(pdev, action);
if (!info)
return NOTIFY_DONE;
down_write(&dmar_global_lock);
if (action == BUS_NOTIFY_ADD_DEVICE)
dmar_pci_bus_add_dev(info);
else if (action == BUS_NOTIFY_DEL_DEVICE)
dmar_pci_bus_del_dev(info);
up_write(&dmar_global_lock);
dmar_free_pci_notify_info(info);
return NOTIFY_OK;
}
static struct notifier_block dmar_pci_bus_nb = {
.notifier_call = dmar_pci_bus_notifier,
.priority = INT_MIN,
};
/**
* dmar_parse_one_drhd - parses exactly one DMA remapping hardware definition
* structure which uniquely represent one DMA remapping hardware unit
@ -196,9 +346,18 @@ dmar_parse_one_drhd(struct acpi_dmar_header *header)
dmaru->reg_base_addr = drhd->address;
dmaru->segment = drhd->segment;
dmaru->include_all = drhd->flags & 0x1; /* BIT0: INCLUDE_ALL */
dmaru->devices = dmar_alloc_dev_scope((void *)(drhd + 1),
((void *)drhd) + drhd->header.length,
&dmaru->devices_cnt);
if (dmaru->devices_cnt && dmaru->devices == NULL) {
kfree(dmaru);
return -ENOMEM;
}
ret = alloc_iommu(dmaru);
if (ret) {
dmar_free_dev_scope(&dmaru->devices,
&dmaru->devices_cnt);
kfree(dmaru);
return ret;
}
@ -215,19 +374,24 @@ static void dmar_free_drhd(struct dmar_drhd_unit *dmaru)
kfree(dmaru);
}
static int __init dmar_parse_dev(struct dmar_drhd_unit *dmaru)
static int __init dmar_parse_one_andd(struct acpi_dmar_header *header)
{
struct acpi_dmar_hardware_unit *drhd;
struct acpi_dmar_andd *andd = (void *)header;
drhd = (struct acpi_dmar_hardware_unit *) dmaru->hdr;
/* Check for NUL termination within the designated length */
if (strnlen(andd->object_name, header->length - 8) == header->length - 8) {
WARN_TAINT(1, TAINT_FIRMWARE_WORKAROUND,
"Your BIOS is broken; ANDD object name is not NUL-terminated\n"
"BIOS vendor: %s; Ver: %s; Product Version: %s\n",
dmi_get_system_info(DMI_BIOS_VENDOR),
dmi_get_system_info(DMI_BIOS_VERSION),
dmi_get_system_info(DMI_PRODUCT_VERSION));
return -EINVAL;
}
pr_info("ANDD device: %x name: %s\n", andd->device_number,
andd->object_name);
if (dmaru->include_all)
return 0;
return dmar_parse_dev_scope((void *)(drhd + 1),
((void *)drhd) + drhd->header.length,
&dmaru->devices_cnt, &dmaru->devices,
drhd->segment);
return 0;
}
#ifdef CONFIG_ACPI_NUMA
@ -293,6 +457,10 @@ dmar_table_print_dmar_entry(struct acpi_dmar_header *header)
(unsigned long long)rhsa->base_address,
rhsa->proximity_domain);
break;
case ACPI_DMAR_TYPE_ANDD:
/* We don't print this here because we need to sanity-check
it first. So print it in dmar_parse_one_andd() instead. */
break;
}
}
@ -378,6 +546,9 @@ parse_dmar_table(void)
ret = dmar_parse_one_rhsa(entry_header);
#endif
break;
case ACPI_DMAR_TYPE_ANDD:
ret = dmar_parse_one_andd(entry_header);
break;
default:
pr_warn("Unknown DMAR structure type %d\n",
entry_header->type);
@ -394,14 +565,15 @@ parse_dmar_table(void)
return ret;
}
static int dmar_pci_device_match(struct pci_dev *devices[], int cnt,
struct pci_dev *dev)
static int dmar_pci_device_match(struct dmar_dev_scope devices[],
int cnt, struct pci_dev *dev)
{
int index;
struct device *tmp;
while (dev) {
for (index = 0; index < cnt; index++)
if (dev == devices[index])
for_each_active_dev_scope(devices, cnt, index, tmp)
if (dev_is_pci(tmp) && dev == to_pci_dev(tmp))
return 1;
/* Check our parent */
@ -414,11 +586,12 @@ static int dmar_pci_device_match(struct pci_dev *devices[], int cnt,
struct dmar_drhd_unit *
dmar_find_matched_drhd_unit(struct pci_dev *dev)
{
struct dmar_drhd_unit *dmaru = NULL;
struct dmar_drhd_unit *dmaru;
struct acpi_dmar_hardware_unit *drhd;
dev = pci_physfn(dev);
rcu_read_lock();
for_each_drhd_unit(dmaru) {
drhd = container_of(dmaru->hdr,
struct acpi_dmar_hardware_unit,
@ -426,44 +599,128 @@ dmar_find_matched_drhd_unit(struct pci_dev *dev)
if (dmaru->include_all &&
drhd->segment == pci_domain_nr(dev->bus))
return dmaru;
goto out;
if (dmar_pci_device_match(dmaru->devices,
dmaru->devices_cnt, dev))
return dmaru;
goto out;
}
dmaru = NULL;
out:
rcu_read_unlock();
return NULL;
return dmaru;
}
static void __init dmar_acpi_insert_dev_scope(u8 device_number,
struct acpi_device *adev)
{
struct dmar_drhd_unit *dmaru;
struct acpi_dmar_hardware_unit *drhd;
struct acpi_dmar_device_scope *scope;
struct device *tmp;
int i;
struct acpi_dmar_pci_path *path;
for_each_drhd_unit(dmaru) {
drhd = container_of(dmaru->hdr,
struct acpi_dmar_hardware_unit,
header);
for (scope = (void *)(drhd + 1);
(unsigned long)scope < ((unsigned long)drhd) + drhd->header.length;
scope = ((void *)scope) + scope->length) {
if (scope->entry_type != ACPI_DMAR_SCOPE_TYPE_ACPI)
continue;
if (scope->enumeration_id != device_number)
continue;
path = (void *)(scope + 1);
pr_info("ACPI device \"%s\" under DMAR at %llx as %02x:%02x.%d\n",
dev_name(&adev->dev), dmaru->reg_base_addr,
scope->bus, path->device, path->function);
for_each_dev_scope(dmaru->devices, dmaru->devices_cnt, i, tmp)
if (tmp == NULL) {
dmaru->devices[i].bus = scope->bus;
dmaru->devices[i].devfn = PCI_DEVFN(path->device,
path->function);
rcu_assign_pointer(dmaru->devices[i].dev,
get_device(&adev->dev));
return;
}
BUG_ON(i >= dmaru->devices_cnt);
}
}
pr_warn("No IOMMU scope found for ANDD enumeration ID %d (%s)\n",
device_number, dev_name(&adev->dev));
}
static int __init dmar_acpi_dev_scope_init(void)
{
struct acpi_dmar_andd *andd;
if (dmar_tbl == NULL)
return -ENODEV;
for (andd = (void *)dmar_tbl + sizeof(struct acpi_table_dmar);
((unsigned long)andd) < ((unsigned long)dmar_tbl) + dmar_tbl->length;
andd = ((void *)andd) + andd->header.length) {
if (andd->header.type == ACPI_DMAR_TYPE_ANDD) {
acpi_handle h;
struct acpi_device *adev;
if (!ACPI_SUCCESS(acpi_get_handle(ACPI_ROOT_OBJECT,
andd->object_name,
&h))) {
pr_err("Failed to find handle for ACPI object %s\n",
andd->object_name);
continue;
}
acpi_bus_get_device(h, &adev);
if (!adev) {
pr_err("Failed to get device for ACPI object %s\n",
andd->object_name);
continue;
}
dmar_acpi_insert_dev_scope(andd->device_number, adev);
}
}
return 0;
}
int __init dmar_dev_scope_init(void)
{
static int dmar_dev_scope_initialized;
struct dmar_drhd_unit *drhd;
int ret = -ENODEV;
struct pci_dev *dev = NULL;
struct dmar_pci_notify_info *info;
if (dmar_dev_scope_initialized)
return dmar_dev_scope_initialized;
if (dmar_dev_scope_status != 1)
return dmar_dev_scope_status;
if (list_empty(&dmar_drhd_units))
goto fail;
if (list_empty(&dmar_drhd_units)) {
dmar_dev_scope_status = -ENODEV;
} else {
dmar_dev_scope_status = 0;
list_for_each_entry(drhd, &dmar_drhd_units, list) {
ret = dmar_parse_dev(drhd);
if (ret)
goto fail;
dmar_acpi_dev_scope_init();
for_each_pci_dev(dev) {
if (dev->is_virtfn)
continue;
info = dmar_alloc_pci_notify_info(dev,
BUS_NOTIFY_ADD_DEVICE);
if (!info) {
return dmar_dev_scope_status;
} else {
dmar_pci_bus_add_dev(info);
dmar_free_pci_notify_info(info);
}
}
bus_register_notifier(&pci_bus_type, &dmar_pci_bus_nb);
}
ret = dmar_parse_rmrr_atsr_dev();
if (ret)
goto fail;
dmar_dev_scope_initialized = 1;
return 0;
fail:
dmar_dev_scope_initialized = ret;
return ret;
return dmar_dev_scope_status;
}
@ -557,6 +814,7 @@ int __init detect_intel_iommu(void)
{
int ret;
down_write(&dmar_global_lock);
ret = dmar_table_detect();
if (ret)
ret = check_zero_address();
@ -574,6 +832,7 @@ int __init detect_intel_iommu(void)
}
early_acpi_os_unmap_memory((void __iomem *)dmar_tbl, dmar_tbl_size);
dmar_tbl = NULL;
up_write(&dmar_global_lock);
return ret ? 1 : -ENODEV;
}
@ -696,6 +955,7 @@ static int alloc_iommu(struct dmar_drhd_unit *drhd)
}
iommu->agaw = agaw;
iommu->msagaw = msagaw;
iommu->segment = drhd->segment;
iommu->node = -1;
@ -1386,10 +1646,15 @@ static int __init dmar_free_unused_resources(void)
if (irq_remapping_enabled || intel_iommu_enabled)
return 0;
if (dmar_dev_scope_status != 1 && !list_empty(&dmar_drhd_units))
bus_unregister_notifier(&pci_bus_type, &dmar_pci_bus_nb);
down_write(&dmar_global_lock);
list_for_each_entry_safe(dmaru, dmaru_n, &dmar_drhd_units, list) {
list_del(&dmaru->list);
dmar_free_drhd(dmaru);
}
up_write(&dmar_global_lock);
return 0;
}

1634
drivers/iommu/intel-iommu.c
View File

File diff suppressed because it is too large Load Diff

108
drivers/iommu/intel_irq_remapping.c
View File

@ -38,6 +38,17 @@ static struct ioapic_scope ir_ioapic[MAX_IO_APICS];
static struct hpet_scope ir_hpet[MAX_HPET_TBS];
static int ir_ioapic_num, ir_hpet_num;
/*
* Lock ordering:
* ->dmar_global_lock
* ->irq_2_ir_lock
* ->qi->q_lock
* ->iommu->register_lock
* Note:
* intel_irq_remap_ops.{supported,prepare,enable,disable,reenable} are called
* in single-threaded environment with interrupt disabled, so no need to tabke
* the dmar_global_lock.
*/
static DEFINE_RAW_SPINLOCK(irq_2_ir_lock);
static int __init parse_ioapics_under_ir(void);
@ -307,12 +318,14 @@ static int set_ioapic_sid(struct irte *irte, int apic)
if (!irte)
return -1;
down_read(&dmar_global_lock);
for (i = 0; i < MAX_IO_APICS; i++) {
if (ir_ioapic[i].id == apic) {
sid = (ir_ioapic[i].bus << 8) | ir_ioapic[i].devfn;
break;
}
}
up_read(&dmar_global_lock);
if (sid == 0) {
pr_warning("Failed to set source-id of IOAPIC (%d)\n", apic);
@ -332,12 +345,14 @@ static int set_hpet_sid(struct irte *irte, u8 id)
if (!irte)
return -1;
down_read(&dmar_global_lock);
for (i = 0; i < MAX_HPET_TBS; i++) {
if (ir_hpet[i].id == id) {
sid = (ir_hpet[i].bus << 8) | ir_hpet[i].devfn;
break;
}
}
up_read(&dmar_global_lock);
if (sid == 0) {
pr_warning("Failed to set source-id of HPET block (%d)\n", id);
@ -794,10 +809,16 @@ static int __init parse_ioapics_under_ir(void)
static int __init ir_dev_scope_init(void)
{
int ret;
if (!irq_remapping_enabled)
return 0;
return dmar_dev_scope_init();
down_write(&dmar_global_lock);
ret = dmar_dev_scope_init();
up_write(&dmar_global_lock);
return ret;
}
rootfs_initcall(ir_dev_scope_init);
@ -878,23 +899,27 @@ static int intel_setup_ioapic_entry(int irq,
struct io_apic_irq_attr *attr)
{
int ioapic_id = mpc_ioapic_id(attr->ioapic);
struct intel_iommu *iommu = map_ioapic_to_ir(ioapic_id);
struct intel_iommu *iommu;
struct IR_IO_APIC_route_entry *entry;
struct irte irte;
int index;
down_read(&dmar_global_lock);
iommu = map_ioapic_to_ir(ioapic_id);
if (!iommu) {
pr_warn("No mapping iommu for ioapic %d\n", ioapic_id);
return -ENODEV;
}
entry = (struct IR_IO_APIC_route_entry *)route_entry;
index = alloc_irte(iommu, irq, 1);
if (index < 0) {
pr_warn("Failed to allocate IRTE for ioapic %d\n", ioapic_id);
return -ENOMEM;
index = -ENODEV;
} else {
index = alloc_irte(iommu, irq, 1);
if (index < 0) {
pr_warn("Failed to allocate IRTE for ioapic %d\n",
ioapic_id);
index = -ENOMEM;
}
}
up_read(&dmar_global_lock);
if (index < 0)
return index;
prepare_irte(&irte, vector, destination);
@ -913,6 +938,7 @@ static int intel_setup_ioapic_entry(int irq,
irte.avail, irte.vector, irte.dest_id,
irte.sid, irte.sq, irte.svt);
entry = (struct IR_IO_APIC_route_entry *)route_entry;
memset(entry, 0, sizeof(*entry));
entry->index2 = (index >> 15) & 0x1;
@ -1043,20 +1069,23 @@ static int intel_msi_alloc_irq(struct pci_dev *dev, int irq, int nvec)
struct intel_iommu *iommu;
int index;
down_read(&dmar_global_lock);
iommu = map_dev_to_ir(dev);
if (!iommu) {
printk(KERN_ERR
"Unable to map PCI %s to iommu\n", pci_name(dev));
return -ENOENT;
index = -ENOENT;
} else {
index = alloc_irte(iommu, irq, nvec);
if (index < 0) {
printk(KERN_ERR
"Unable to allocate %d IRTE for PCI %s\n",
nvec, pci_name(dev));
index = -ENOSPC;
}
}
up_read(&dmar_global_lock);
index = alloc_irte(iommu, irq, nvec);
if (index < 0) {
printk(KERN_ERR
"Unable to allocate %d IRTE for PCI %s\n", nvec,
pci_name(dev));
return -ENOSPC;
}
return index;
}
@ -1064,33 +1093,40 @@ static int intel_msi_setup_irq(struct pci_dev *pdev, unsigned int irq,
int index, int sub_handle)
{
struct intel_iommu *iommu;
int ret = -ENOENT;
down_read(&dmar_global_lock);
iommu = map_dev_to_ir(pdev);
if (!iommu)
return -ENOENT;
/*
* setup the mapping between the irq and the IRTE
* base index, the sub_handle pointing to the
* appropriate interrupt remap table entry.
*/
set_irte_irq(irq, iommu, index, sub_handle);
if (iommu) {
/*
* setup the mapping between the irq and the IRTE
* base index, the sub_handle pointing to the
* appropriate interrupt remap table entry.
*/
set_irte_irq(irq, iommu, index, sub_handle);
ret = 0;
}
up_read(&dmar_global_lock);
return 0;
return ret;
}
static int intel_setup_hpet_msi(unsigned int irq, unsigned int id)
{
struct intel_iommu *iommu = map_hpet_to_ir(id);
int ret = -1;
struct intel_iommu *iommu;
int index;
if (!iommu)
return -1;
down_read(&dmar_global_lock);
iommu = map_hpet_to_ir(id);
if (iommu) {
index = alloc_irte(iommu, irq, 1);
if (index >= 0)
ret = 0;
}
up_read(&dmar_global_lock);
index = alloc_irte(iommu, irq, 1);
if (index < 0)
return -1;
return 0;
return ret;
}
struct irq_remap_ops intel_irq_remap_ops = {

64
drivers/iommu/iova.c
View File

@ -342,19 +342,30 @@ __is_range_overlap(struct rb_node *node,
return 0;
}
static inline struct iova *
alloc_and_init_iova(unsigned long pfn_lo, unsigned long pfn_hi)
{
struct iova *iova;
iova = alloc_iova_mem();
if (iova) {
iova->pfn_lo = pfn_lo;
iova->pfn_hi = pfn_hi;
}
return iova;
}
static struct iova *
__insert_new_range(struct iova_domain *iovad,
unsigned long pfn_lo, unsigned long pfn_hi)
{
struct iova *iova;
iova = alloc_iova_mem();
if (!iova)
return iova;
iova = alloc_and_init_iova(pfn_lo, pfn_hi);
if (iova)
iova_insert_rbtree(&iovad->rbroot, iova);
iova->pfn_hi = pfn_hi;
iova->pfn_lo = pfn_lo;
iova_insert_rbtree(&iovad->rbroot, iova);
return iova;
}
@ -433,3 +444,44 @@ copy_reserved_iova(struct iova_domain *from, struct iova_domain *to)
}
spin_unlock_irqrestore(&from->iova_rbtree_lock, flags);
}
struct iova *
split_and_remove_iova(struct iova_domain *iovad, struct iova *iova,
unsigned long pfn_lo, unsigned long pfn_hi)
{
unsigned long flags;
struct iova *prev = NULL, *next = NULL;
spin_lock_irqsave(&iovad->iova_rbtree_lock, flags);
if (iova->pfn_lo < pfn_lo) {
prev = alloc_and_init_iova(iova->pfn_lo, pfn_lo - 1);
if (prev == NULL)
goto error;
}
if (iova->pfn_hi > pfn_hi) {
next = alloc_and_init_iova(pfn_hi + 1, iova->pfn_hi);
if (next == NULL)
goto error;
}
__cached_rbnode_delete_update(iovad, iova);
rb_erase(&iova->node, &iovad->rbroot);
if (prev) {
iova_insert_rbtree(&iovad->rbroot, prev);
iova->pfn_lo = pfn_lo;
}
if (next) {
iova_insert_rbtree(&iovad->rbroot, next);
iova->pfn_hi = pfn_hi;
}
spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
return iova;
error:
spin_unlock_irqrestore(&iovad->iova_rbtree_lock, flags);
if (prev)
free_iova_mem(prev);
return NULL;
}

162
drivers/iommu/omap-iommu.c
View File

@ -23,6 +23,9 @@
#include <linux/spinlock.h>
#include <linux/io.h>
#include <linux/pm_runtime.h>
#include <linux/of.h>
#include <linux/of_iommu.h>
#include <linux/of_irq.h>
#include <asm/cacheflush.h>
@ -146,13 +149,10 @@ static int iommu_enable(struct omap_iommu *obj)
struct platform_device *pdev = to_platform_device(obj->dev);
struct iommu_platform_data *pdata = pdev->dev.platform_data;
if (!pdata)
return -EINVAL;
if (!arch_iommu)
return -ENODEV;
if (pdata->deassert_reset) {
if (pdata && pdata->deassert_reset) {
err = pdata->deassert_reset(pdev, pdata->reset_name);
if (err) {
dev_err(obj->dev, "deassert_reset failed: %d\n", err);
@ -172,14 +172,11 @@ static void iommu_disable(struct omap_iommu *obj)
struct platform_device *pdev = to_platform_device(obj->dev);
struct iommu_platform_data *pdata = pdev->dev.platform_data;
if (!pdata)
return;
arch_iommu->disable(obj);
pm_runtime_put_sync(obj->dev);
if (pdata->assert_reset)
if (pdata && pdata->assert_reset)
pdata->assert_reset(pdev, pdata->reset_name);
}
@ -523,7 +520,8 @@ static void flush_iopte_range(u32 *first, u32 *last)
static void iopte_free(u32 *iopte)
{
/* Note: freed iopte's must be clean ready for re-use */
kmem_cache_free(iopte_cachep, iopte);
if (iopte)
kmem_cache_free(iopte_cachep, iopte);
}
static u32 *iopte_alloc(struct omap_iommu *obj, u32 *iopgd, u32 da)
@ -863,7 +861,7 @@ static int device_match_by_alias(struct device *dev, void *data)
**/
static struct omap_iommu *omap_iommu_attach(const char *name, u32 *iopgd)
{
int err = -ENOMEM;
int err;
struct device *dev;
struct omap_iommu *obj;
@ -871,7 +869,7 @@ static struct omap_iommu *omap_iommu_attach(const char *name, u32 *iopgd)
(void *)name,
device_match_by_alias);
if (!dev)
return NULL;
return ERR_PTR(-ENODEV);
obj = to_iommu(dev);
@ -890,8 +888,10 @@ static struct omap_iommu *omap_iommu_attach(const char *name, u32 *iopgd)
goto err_enable;
flush_iotlb_all(obj);
if (!try_module_get(obj->owner))
if (!try_module_get(obj->owner)) {
err = -ENODEV;
goto err_module;
}
spin_unlock(&obj->iommu_lock);
@ -940,17 +940,41 @@ static int omap_iommu_probe(struct platform_device *pdev)
struct omap_iommu *obj;
struct resource *res;
struct iommu_platform_data *pdata = pdev->dev.platform_data;
struct device_node *of = pdev->dev.of_node;
obj = kzalloc(sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL);
obj = devm_kzalloc(&pdev->dev, sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL);
if (!obj)
return -ENOMEM;
obj->nr_tlb_entries = pdata->nr_tlb_entries;
obj->name = pdata->name;
if (of) {
obj->name = dev_name(&pdev->dev);
obj->nr_tlb_entries = 32;
err = of_property_read_u32(of, "ti,#tlb-entries",
&obj->nr_tlb_entries);
if (err && err != -EINVAL)
return err;
if (obj->nr_tlb_entries != 32 && obj->nr_tlb_entries != 8)
return -EINVAL;
/*
* da_start and da_end are needed for omap-iovmm, so hardcode
* these values as used by OMAP3 ISP - the only user for
* omap-iovmm
*/
obj->da_start = 0;
obj->da_end = 0xfffff000;
if (of_find_property(of, "ti,iommu-bus-err-back", NULL))
obj->has_bus_err_back = MMU_GP_REG_BUS_ERR_BACK_EN;
} else {
obj->nr_tlb_entries = pdata->nr_tlb_entries;
obj->name = pdata->name;
obj->da_start = pdata->da_start;
obj->da_end = pdata->da_end;
}
if (obj->da_end <= obj->da_start)
return -EINVAL;
obj->dev = &pdev->dev;
obj->ctx = (void *)obj + sizeof(*obj);
obj->da_start = pdata->da_start;
obj->da_end = pdata->da_end;
spin_lock_init(&obj->iommu_lock);
mutex_init(&obj->mmap_lock);
@ -958,33 +982,18 @@ static int omap_iommu_probe(struct platform_device *pdev)
INIT_LIST_HEAD(&obj->mmap);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
err = -ENODEV;
goto err_mem;
}
res = request_mem_region(res->start, resource_size(res),
dev_name(&pdev->dev));
if (!res) {
err = -EIO;
goto err_mem;
}
obj->regbase = ioremap(res->start, resource_size(res));
if (!obj->regbase) {
err = -ENOMEM;
goto err_ioremap;
}
obj->regbase = devm_ioremap_resource(obj->dev, res);
if (IS_ERR(obj->regbase))
return PTR_ERR(obj->regbase);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
err = -ENODEV;
goto err_irq;
}
err = request_irq(irq, iommu_fault_handler, IRQF_SHARED,
dev_name(&pdev->dev), obj);
if (irq < 0)
return -ENODEV;
err = devm_request_irq(obj->dev, irq, iommu_fault_handler, IRQF_SHARED,
dev_name(obj->dev), obj);
if (err < 0)
goto err_irq;
return err;
platform_set_drvdata(pdev, obj);
pm_runtime_irq_safe(obj->dev);
@ -992,42 +1001,34 @@ static int omap_iommu_probe(struct platform_device *pdev)
dev_info(&pdev->dev, "%s registered\n", obj->name);
return 0;
err_irq:
iounmap(obj->regbase);
err_ioremap:
release_mem_region(res->start, resource_size(res));
err_mem:
kfree(obj);
return err;
}
static int omap_iommu_remove(struct platform_device *pdev)
{
int irq;
struct resource *res;
struct omap_iommu *obj = platform_get_drvdata(pdev);
iopgtable_clear_entry_all(obj);
irq = platform_get_irq(pdev, 0);
free_irq(irq, obj);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
release_mem_region(res->start, resource_size(res));
iounmap(obj->regbase);
pm_runtime_disable(obj->dev);
dev_info(&pdev->dev, "%s removed\n", obj->name);
kfree(obj);
return 0;
}
static struct of_device_id omap_iommu_of_match[] = {
{ .compatible = "ti,omap2-iommu" },
{ .compatible = "ti,omap4-iommu" },
{ .compatible = "ti,dra7-iommu" },
{},
};
MODULE_DEVICE_TABLE(of, omap_iommu_of_match);
static struct platform_driver omap_iommu_driver = {
.probe = omap_iommu_probe,
.remove = omap_iommu_remove,
.driver = {
.name = "omap-iommu",
.of_match_table = of_match_ptr(omap_iommu_of_match),
},
};
@ -1253,6 +1254,49 @@ static int omap_iommu_domain_has_cap(struct iommu_domain *domain,
return 0;
}
static int omap_iommu_add_device(struct device *dev)
{
struct omap_iommu_arch_data *arch_data;
struct device_node *np;
/*
* Allocate the archdata iommu structure for DT-based devices.
*
* TODO: Simplify this when removing non-DT support completely from the
* IOMMU users.
*/
if (!dev->of_node)
return 0;
np = of_parse_phandle(dev->of_node, "iommus", 0);
if (!np)
return 0;
arch_data = kzalloc(sizeof(*arch_data), GFP_KERNEL);
if (!arch_data) {
of_node_put(np);
return -ENOMEM;
}
arch_data->name = kstrdup(dev_name(dev), GFP_KERNEL);
dev->archdata.iommu = arch_data;
of_node_put(np);
return 0;
}
static void omap_iommu_remove_device(struct device *dev)
{
struct omap_iommu_arch_data *arch_data = dev->archdata.iommu;
if (!dev->of_node || !arch_data)
return;
kfree(arch_data->name);
kfree(arch_data);
}
static struct iommu_ops omap_iommu_ops = {
.domain_init = omap_iommu_domain_init,
.domain_destroy = omap_iommu_domain_destroy,
@ -1262,6 +1306,8 @@ static struct iommu_ops omap_iommu_ops = {
.unmap = omap_iommu_unmap,
.iova_to_phys = omap_iommu_iova_to_phys,
.domain_has_cap = omap_iommu_domain_has_cap,
.add_device = omap_iommu_add_device,
.remove_device = omap_iommu_remove_device,
.pgsize_bitmap = OMAP_IOMMU_PGSIZES,
};

5
drivers/iommu/omap-iommu.h
View File

@ -52,6 +52,8 @@ struct omap_iommu {
void *ctx; /* iommu context: registres saved area */
u32 da_start;
u32 da_end;
int has_bus_err_back;
};
struct cr_regs {
@ -130,6 +132,7 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
#define MMU_READ_CAM 0x68
#define MMU_READ_RAM 0x6c
#define MMU_EMU_FAULT_AD 0x70
#define MMU_GP_REG 0x88
#define MMU_REG_SIZE 256
@ -163,6 +166,8 @@ static inline struct omap_iommu *dev_to_omap_iommu(struct device *dev)
#define MMU_RAM_MIXED_MASK (1 << MMU_RAM_MIXED_SHIFT)
#define MMU_RAM_MIXED MMU_RAM_MIXED_MASK
#define MMU_GP_REG_BUS_ERR_BACK_EN 0x1
/*
* utilities for super page(16MB, 1MB, 64KB and 4KB)
*/

3
drivers/iommu/omap-iommu2.c
View File

@ -98,6 +98,9 @@ static int omap2_iommu_enable(struct omap_iommu *obj)
iommu_write_reg(obj, pa, MMU_TTB);
if (obj->has_bus_err_back)
iommu_write_reg(obj, MMU_GP_REG_BUS_ERR_BACK_EN, MMU_GP_REG);
__iommu_set_twl(obj, true);
return 0;

15
include/acpi/actbl2.h
View File

@ -424,7 +424,8 @@ enum acpi_dmar_type {
ACPI_DMAR_TYPE_RESERVED_MEMORY = 1,
ACPI_DMAR_TYPE_ATSR = 2,
ACPI_DMAR_HARDWARE_AFFINITY = 3,
ACPI_DMAR_TYPE_RESERVED = 4 /* 4 and greater are reserved */
ACPI_DMAR_TYPE_ANDD = 4,
ACPI_DMAR_TYPE_RESERVED = 5 /* 5 and greater are reserved */
};
/* DMAR Device Scope structure */
@ -445,7 +446,8 @@ enum acpi_dmar_scope_type {
ACPI_DMAR_SCOPE_TYPE_BRIDGE = 2,
ACPI_DMAR_SCOPE_TYPE_IOAPIC = 3,
ACPI_DMAR_SCOPE_TYPE_HPET = 4,
ACPI_DMAR_SCOPE_TYPE_RESERVED = 5 /* 5 and greater are reserved */
ACPI_DMAR_SCOPE_TYPE_ACPI = 5,
ACPI_DMAR_SCOPE_TYPE_RESERVED = 6 /* 6 and greater are reserved */
};
struct acpi_dmar_pci_path {
@ -507,6 +509,15 @@ struct acpi_dmar_rhsa {
u32 proximity_domain;
};
/* 4: ACPI Namespace Device Declaration Structure */
struct acpi_dmar_andd {
struct acpi_dmar_header header;
u8 reserved[3];
u8 device_number;
u8 object_name[];
};
/*******************************************************************************
*
* HPET - High Precision Event Timer table

82
include/linux/dmar.h
View File

@ -25,6 +25,8 @@
#include <linux/types.h>
#include <linux/msi.h>
#include <linux/irqreturn.h>
#include <linux/rwsem.h>
#include <linux/rcupdate.h>
struct acpi_dmar_header;
@ -34,13 +36,19 @@ struct acpi_dmar_header;
struct intel_iommu;
struct dmar_dev_scope {
struct device __rcu *dev;
u8 bus;
u8 devfn;
};
#ifdef CONFIG_DMAR_TABLE
extern struct acpi_table_header *dmar_tbl;
struct dmar_drhd_unit {
struct list_head list; /* list of drhd units */
struct acpi_dmar_header *hdr; /* ACPI header */
u64 reg_base_addr; /* register base address*/
struct pci_dev **devices; /* target device array */
struct dmar_dev_scope *devices;/* target device array */
int devices_cnt; /* target device count */
u16 segment; /* PCI domain */
u8 ignored:1; /* ignore drhd */
@ -48,33 +56,66 @@ struct dmar_drhd_unit {
struct intel_iommu *iommu;
};
struct dmar_pci_notify_info {
struct pci_dev *dev;
unsigned long event;
int bus;
u16 seg;
u16 level;
struct acpi_dmar_pci_path path[];
} __attribute__((packed));
extern struct rw_semaphore dmar_global_lock;
extern struct list_head dmar_drhd_units;
#define for_each_drhd_unit(drhd) \
list_for_each_entry(drhd, &dmar_drhd_units, list)
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list)
#define for_each_active_drhd_unit(drhd) \
list_for_each_entry(drhd, &dmar_drhd_units, list) \
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
if (drhd->ignored) {} else
#define for_each_active_iommu(i, drhd) \
list_for_each_entry(drhd, &dmar_drhd_units, list) \
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
if (i=drhd->iommu, drhd->ignored) {} else
#define for_each_iommu(i, drhd) \
list_for_each_entry(drhd, &dmar_drhd_units, list) \
list_for_each_entry_rcu(drhd, &dmar_drhd_units, list) \
if (i=drhd->iommu, 0) {} else
static inline bool dmar_rcu_check(void)
{
return rwsem_is_locked(&dmar_global_lock) ||
system_state == SYSTEM_BOOTING;
}
#define dmar_rcu_dereference(p) rcu_dereference_check((p), dmar_rcu_check())
#define for_each_dev_scope(a, c, p, d) \
for ((p) = 0; ((d) = (p) < (c) ? dmar_rcu_dereference((a)[(p)].dev) : \
NULL, (p) < (c)); (p)++)
#define for_each_active_dev_scope(a, c, p, d) \
for_each_dev_scope((a), (c), (p), (d)) if (!(d)) { continue; } else
extern int dmar_table_init(void);
extern int dmar_dev_scope_init(void);
extern int dmar_parse_dev_scope(void *start, void *end, int *cnt,
struct pci_dev ***devices, u16 segment);
extern void dmar_free_dev_scope(struct pci_dev ***devices, int *cnt);
struct dmar_dev_scope **devices, u16 segment);
extern void *dmar_alloc_dev_scope(void *start, void *end, int *cnt);
extern void dmar_free_dev_scope(struct dmar_dev_scope **devices, int *cnt);
extern int dmar_insert_dev_scope(struct dmar_pci_notify_info *info,
void *start, void*end, u16 segment,
struct dmar_dev_scope *devices,
int devices_cnt);
extern int dmar_remove_dev_scope(struct dmar_pci_notify_info *info,
u16 segment, struct dmar_dev_scope *devices,
int count);
/* Intel IOMMU detection */
extern int detect_intel_iommu(void);
extern int enable_drhd_fault_handling(void);
#else
struct dmar_pci_notify_info;
static inline int detect_intel_iommu(void)
{
return -ENODEV;
@ -138,30 +179,9 @@ extern int arch_setup_dmar_msi(unsigned int irq);
#ifdef CONFIG_INTEL_IOMMU
extern int iommu_detected, no_iommu;
extern struct list_head dmar_rmrr_units;
struct dmar_rmrr_unit {
struct list_head list; /* list of rmrr units */
struct acpi_dmar_header *hdr; /* ACPI header */
u64 base_address; /* reserved base address*/
u64 end_address; /* reserved end address */
struct pci_dev **devices; /* target devices */
int devices_cnt; /* target device count */
};
#define for_each_rmrr_units(rmrr) \
list_for_each_entry(rmrr, &dmar_rmrr_units, list)
struct dmar_atsr_unit {
struct list_head list; /* list of ATSR units */
struct acpi_dmar_header *hdr; /* ACPI header */
struct pci_dev **devices; /* target devices */
int devices_cnt; /* target device count */
u8 include_all:1; /* include all ports */
};
int dmar_parse_rmrr_atsr_dev(void);
extern int dmar_parse_one_rmrr(struct acpi_dmar_header *header);
extern int dmar_parse_one_atsr(struct acpi_dmar_header *header);
extern int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info);
extern int intel_iommu_init(void);
#else /* !CONFIG_INTEL_IOMMU: */
static inline int intel_iommu_init(void) { return -ENODEV; }
@ -173,7 +193,7 @@ static inline int dmar_parse_one_atsr(struct acpi_dmar_header *header)
{
return 0;
}
static inline int dmar_parse_rmrr_atsr_dev(void)
static inline int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
{
return 0;
}

1
include/linux/intel-iommu.h
View File

@ -319,6 +319,7 @@ struct intel_iommu {
int agaw; /* agaw of this iommu */
int msagaw; /* max sagaw of this iommu */
unsigned int irq;
u16 segment; /* PCI segment# */
unsigned char name[13]; /* Device Name */
#ifdef CONFIG_INTEL_IOMMU

2
include/linux/iova.h
View File

@ -47,5 +47,7 @@ void copy_reserved_iova(struct iova_domain *from, struct iova_domain *to);
void init_iova_domain(struct iova_domain *iovad, unsigned long pfn_32bit);
struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
void put_iova_domain(struct iova_domain *iovad);
struct iova *split_and_remove_iova(struct iova_domain *iovad,
struct iova *iova, unsigned long pfn_lo, unsigned long pfn_hi);
#endif