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IOMMU Updates for Linux v6.12

Browse Source 
Including:
 
 	- Core changes:
 	  - Allow ATS on VF when parent device is identity mapped.
 	  - Optimize unmap path on ARM io-pagetable implementation.
 	  - Use of_property_present().
 
 	- ARM-SMMU changes:
 	  - SMMUv2:
 	    - Devicetree binding updates for Qualcomm MMU-500 implementations.
 	    - Extend workarounds for broken Qualcomm hypervisor to avoid
 	      touching features that are not available (e.g. 16KiB page
 	      support, reserved context banks).
 	  - SMMUv3:
 	    - Support for NVIDIA's custom virtual command queue hardware.
 	    - Fix Stage-2 stall configuration and extend tests to cover this
 	      area.
 	    - A bunch of driver cleanups, including simplification of the
 	      master rbtree code.
 	  - Plus minor cleanups and fixes across both drivers.
 
 	- Intel VT-d changes:
 	  - Retire si_domain and convert to use static identity domain.
 	  - Batched IOTLB/dev-IOTLB invalidation.
 	  - Small code refactoring and cleanups.
 
 	- AMD-Vi changes:
 	  - Cleanup and refactoring of io-pagetable code.
 	  - Add parameter to limit the used io-pagesizes.
 	  - Other cleanups and fixes.
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Merge tag 'iommu-updates-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux

Pull iommu updates from Joerg Roedel:
 "Core changes:
   - Allow ATS on VF when parent device is identity mapped
   - Optimize unmap path on ARM io-pagetable implementation
   - Use of_property_present()

  ARM-SMMU changes:
   - SMMUv2:
       - Devicetree binding updates for Qualcomm MMU-500 implementations
       - Extend workarounds for broken Qualcomm hypervisor to avoid
         touching features that are not available (e.g. 16KiB page
         support, reserved context banks)
   - SMMUv3:
       - Support for NVIDIA's custom virtual command queue hardware
       - Fix Stage-2 stall configuration and extend tests to cover this
         area
       - A bunch of driver cleanups, including simplification of the
         master rbtree code
   - Minor cleanups and fixes across both drivers

  Intel VT-d changes:
   - Retire si_domain and convert to use static identity domain
   - Batched IOTLB/dev-IOTLB invalidation
   - Small code refactoring and cleanups

  AMD-Vi changes:
   - Cleanup and refactoring of io-pagetable code
   - Add parameter to limit the used io-pagesizes
   - Other cleanups and fixes"

* tag 'iommu-updates-v6.12' of git://git.kernel.org/pub/scm/linux/kernel/git/iommu/linux: (77 commits)
  dt-bindings: arm-smmu: Add compatible for QCS8300 SoC
  iommu/amd: Test for PAGING domains before freeing a domain
  iommu/amd: Fix argument order in amd_iommu_dev_flush_pasid_all()
  iommu/amd: Add kernel parameters to limit V1 page-sizes
  iommu/arm-smmu-v3: Reorganize struct arm_smmu_ctx_desc_cfg
  iommu/arm-smmu-v3: Add types for each level of the CD table
  iommu/arm-smmu-v3: Shrink the cdtab l1_desc array
  iommu/arm-smmu-v3: Do not use devm for the cd table allocations
  iommu/arm-smmu-v3: Remove strtab_base/cfg
  iommu/arm-smmu-v3: Reorganize struct arm_smmu_strtab_cfg
  iommu/arm-smmu-v3: Add types for each level of the 2 level stream table
  iommu/arm-smmu-v3: Add arm_smmu_strtab_l1/2_idx()
  iommu/arm-smmu-qcom: apply num_context_bank fixes for SDM630 / SDM660
  iommu/arm-smmu-v3: Use the new rb tree helpers
  dt-bindings: arm-smmu: document the support on SA8255p
  iommu/tegra241-cmdqv: Do not allocate vcmdq until dma_set_mask_and_coherent
  iommu/tegra241-cmdqv: Drop static at local variable
  iommu/tegra241-cmdqv: Fix ioremap() error handling in probe()
  iommu/amd: Do not set the D bit on AMD v2 table entries
  iommu/amd: Correct the reported page sizes from the V1 table
  ...
This commit is contained in:
Linus Torvalds 2024-09-18 12:45:52 +02:00
commit eec91e22fe
31 changed files with 2262 additions and 1043 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
Documentation/admin-guide/kernel-parameters.txt
View File

@ -333,12 +333,17 @@
allowed anymore to lift isolation
requirements as needed. This option
does not override iommu=pt
force_enable - Force enable the IOMMU on platforms known
to be buggy with IOMMU enabled. Use this
option with care.
pgtbl_v1 - Use v1 page table for DMA-API (Default).
pgtbl_v2 - Use v2 page table for DMA-API.
irtcachedis - Disable Interrupt Remapping Table (IRT) caching.
force_enable - Force enable the IOMMU on platforms known
to be buggy with IOMMU enabled. Use this
option with care.
pgtbl_v1 - Use v1 page table for DMA-API (Default).
pgtbl_v2 - Use v2 page table for DMA-API.
irtcachedis - Disable Interrupt Remapping Table (IRT) caching.
nohugepages - Limit page-sizes used for v1 page-tables
to 4 KiB.
v2_pgsizes_only - Limit page-sizes used for v1 page-tables
to 4KiB/2Mib/1GiB.
amd_iommu_dump= [HW,X86-64]
Enable AMD IOMMU driver option to dump the ACPI table

5
Documentation/devicetree/bindings/iommu/arm,smmu.yaml
View File

@ -36,7 +36,9 @@ properties:
items:
- enum:
- qcom,qcm2290-smmu-500
- qcom,qcs8300-smmu-500
- qcom,qdu1000-smmu-500
- qcom,sa8255p-smmu-500
- qcom,sa8775p-smmu-500
- qcom,sc7180-smmu-500
- qcom,sc7280-smmu-500
@ -84,6 +86,7 @@ properties:
items:
- enum:
- qcom,qcm2290-smmu-500
- qcom,sa8255p-smmu-500
- qcom,sa8775p-smmu-500
- qcom,sc7280-smmu-500
- qcom,sc8180x-smmu-500
@ -552,7 +555,9 @@ allOf:
- cavium,smmu-v2
- marvell,ap806-smmu-500
- nvidia,smmu-500
- qcom,qcs8300-smmu-500
- qcom,qdu1000-smmu-500
- qcom,sa8255p-smmu-500
- qcom,sc7180-smmu-500
- qcom,sdm670-smmu-500
- qcom,sdm845-smmu-500

1
MAINTAINERS
View File

@ -22650,6 +22650,7 @@ M: Thierry Reding <thierry.reding@gmail.com>
R: Krishna Reddy <vdumpa@nvidia.com>
L: linux-tegra@vger.kernel.org
S: Supported
F: drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c
F: drivers/iommu/arm/arm-smmu/arm-smmu-nvidia.c
F: drivers/iommu/tegra*

11
drivers/iommu/Kconfig
View File

@ -424,6 +424,17 @@ config ARM_SMMU_V3_KUNIT_TEST
Enable this option to unit-test arm-smmu-v3 driver functions.
If unsure, say N.
config TEGRA241_CMDQV
bool "NVIDIA Tegra241 CMDQ-V extension support for ARM SMMUv3"
depends on ACPI
help
Support for NVIDIA CMDQ-Virtualization extension for ARM SMMUv3. The
CMDQ-V extension is similar to v3.3 ECMDQ for multi command queues
support, except with virtualization capabilities.
Say Y here if your system is NVIDIA Tegra241 (Grace) or it has the same
CMDQ-V extension.
endif
config S390_IOMMU

26
drivers/iommu/amd/amd_iommu.h
View File

@ -43,9 +43,10 @@ int amd_iommu_enable_faulting(unsigned int cpu);
extern int amd_iommu_guest_ir;
extern enum io_pgtable_fmt amd_iommu_pgtable;
extern int amd_iommu_gpt_level;
extern unsigned long amd_iommu_pgsize_bitmap;
/* Protection domain ops */
struct protection_domain *protection_domain_alloc(unsigned int type);
struct protection_domain *protection_domain_alloc(unsigned int type, int nid);
void protection_domain_free(struct protection_domain *domain);
struct iommu_domain *amd_iommu_domain_alloc_sva(struct device *dev,
struct mm_struct *mm);
@ -87,14 +88,10 @@ int amd_iommu_complete_ppr(struct device *dev, u32 pasid, int status, int tag);
void amd_iommu_flush_all_caches(struct amd_iommu *iommu);
void amd_iommu_update_and_flush_device_table(struct protection_domain *domain);
void amd_iommu_domain_update(struct protection_domain *domain);
void amd_iommu_dev_update_dte(struct iommu_dev_data *dev_data, bool set);
void amd_iommu_domain_flush_complete(struct protection_domain *domain);
void amd_iommu_domain_flush_pages(struct protection_domain *domain,
u64 address, size_t size);
void amd_iommu_dev_flush_pasid_pages(struct iommu_dev_data *dev_data,
ioasid_t pasid, u64 address, size_t size);
void amd_iommu_dev_flush_pasid_all(struct iommu_dev_data *dev_data,
ioasid_t pasid);
#ifdef CONFIG_IRQ_REMAP
int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
@ -121,11 +118,6 @@ static inline bool check_feature2(u64 mask)
return (amd_iommu_efr2 & mask);
}
static inline int check_feature_gpt_level(void)
{
return ((amd_iommu_efr >> FEATURE_GATS_SHIFT) & FEATURE_GATS_MASK);
}
static inline bool amd_iommu_gt_ppr_supported(void)
{
return (check_feature(FEATURE_GT) &&
@ -143,19 +135,6 @@ static inline void *iommu_phys_to_virt(unsigned long paddr)
return phys_to_virt(__sme_clr(paddr));
}
static inline
void amd_iommu_domain_set_pt_root(struct protection_domain *domain, u64 root)
{
domain->iop.root = (u64 *)(root & PAGE_MASK);
domain->iop.mode = root & 7; /* lowest 3 bits encode pgtable mode */
}
static inline
void amd_iommu_domain_clr_pt_root(struct protection_domain *domain)
{
amd_iommu_domain_set_pt_root(domain, 0);
}
static inline int get_pci_sbdf_id(struct pci_dev *pdev)
{
int seg = pci_domain_nr(pdev->bus);
@ -185,7 +164,6 @@ static inline struct protection_domain *to_pdomain(struct iommu_domain *dom)
}
bool translation_pre_enabled(struct amd_iommu *iommu);
bool amd_iommu_is_attach_deferred(struct device *dev);
int __init add_special_device(u8 type, u8 id, u32 *devid, bool cmd_line);
#ifdef CONFIG_DMI

35
drivers/iommu/amd/amd_iommu_types.h
View File

@ -8,6 +8,7 @@
#ifndef _ASM_X86_AMD_IOMMU_TYPES_H
#define _ASM_X86_AMD_IOMMU_TYPES_H
#include <linux/bitfield.h>
#include <linux/iommu.h>
#include <linux/types.h>
#include <linux/mmu_notifier.h>
@ -95,26 +96,21 @@
#define FEATURE_GA BIT_ULL(7)
#define FEATURE_HE BIT_ULL(8)
#define FEATURE_PC BIT_ULL(9)
#define FEATURE_GATS_SHIFT (12)
#define FEATURE_GATS_MASK (3ULL)
#define FEATURE_GATS GENMASK_ULL(13, 12)
#define FEATURE_GLX GENMASK_ULL(15, 14)
#define FEATURE_GAM_VAPIC BIT_ULL(21)
#define FEATURE_PASMAX GENMASK_ULL(36, 32)
#define FEATURE_GIOSUP BIT_ULL(48)
#define FEATURE_HASUP BIT_ULL(49)
#define FEATURE_EPHSUP BIT_ULL(50)
#define FEATURE_HDSUP BIT_ULL(52)
#define FEATURE_SNP BIT_ULL(63)
#define FEATURE_PASID_SHIFT 32
#define FEATURE_PASID_MASK (0x1fULL << FEATURE_PASID_SHIFT)
#define FEATURE_GLXVAL_SHIFT 14
#define FEATURE_GLXVAL_MASK (0x03ULL << FEATURE_GLXVAL_SHIFT)
/* Extended Feature 2 Bits */
#define FEATURE_SNPAVICSUP_SHIFT 5
#define FEATURE_SNPAVICSUP_MASK (0x07ULL << FEATURE_SNPAVICSUP_SHIFT)
#define FEATURE_SNPAVICSUP GENMASK_ULL(7, 5)
#define FEATURE_SNPAVICSUP_GAM(x) \
((x & FEATURE_SNPAVICSUP_MASK) >> FEATURE_SNPAVICSUP_SHIFT == 0x1)
(FIELD_GET(FEATURE_SNPAVICSUP, x) == 0x1)
/* Note:
* The current driver only support 16-bit PASID.
@ -294,8 +290,13 @@
* that we support.
*
* 512GB Pages are not supported due to a hardware bug
* Page sizes >= the 52 bit max physical address of the CPU are not supported.
*/
#define AMD_IOMMU_PGSIZES ((~0xFFFUL) & ~(2ULL << 38))
#define AMD_IOMMU_PGSIZES (GENMASK_ULL(51, 12) ^ SZ_512G)
/* Special mode where page-sizes are limited to 4 KiB */
#define AMD_IOMMU_PGSIZES_4K (PAGE_SIZE)
/* 4K, 2MB, 1G page sizes are supported */
#define AMD_IOMMU_PGSIZES_V2 (PAGE_SIZE | (1ULL << 21) | (1ULL << 30))
@ -419,10 +420,6 @@
#define DTE_GCR3_VAL_B(x) (((x) >> 15) & 0x0ffffULL)
#define DTE_GCR3_VAL_C(x) (((x) >> 31) & 0x1fffffULL)
#define DTE_GCR3_INDEX_A 0
#define DTE_GCR3_INDEX_B 1
#define DTE_GCR3_INDEX_C 1
#define DTE_GCR3_SHIFT_A 58
#define DTE_GCR3_SHIFT_B 16
#define DTE_GCR3_SHIFT_C 43
@ -527,7 +524,7 @@ struct amd_irte_ops;
#define AMD_IOMMU_FLAG_TRANS_PRE_ENABLED (1 << 0)
#define io_pgtable_to_data(x) \
container_of((x), struct amd_io_pgtable, iop)
container_of((x), struct amd_io_pgtable, pgtbl)
#define io_pgtable_ops_to_data(x) \
io_pgtable_to_data(io_pgtable_ops_to_pgtable(x))
@ -537,7 +534,7 @@ struct amd_irte_ops;
struct protection_domain, iop)
#define io_pgtable_cfg_to_data(x) \
container_of((x), struct amd_io_pgtable, pgtbl_cfg)
container_of((x), struct amd_io_pgtable, pgtbl.cfg)
struct gcr3_tbl_info {
u64 *gcr3_tbl; /* Guest CR3 table */
@ -547,8 +544,7 @@ struct gcr3_tbl_info {
};
struct amd_io_pgtable {
struct io_pgtable_cfg pgtbl_cfg;
struct io_pgtable iop;
struct io_pgtable pgtbl;
int mode;
u64 *root;
u64 *pgd; /* v2 pgtable pgd pointer */
@ -580,7 +576,6 @@ struct protection_domain {
struct amd_io_pgtable iop;
spinlock_t lock; /* mostly used to lock the page table*/
u16 id; /* the domain id written to the device table */
int nid; /* Node ID */
enum protection_domain_mode pd_mode; /* Track page table type */
bool dirty_tracking; /* dirty tracking is enabled in the domain */
unsigned dev_cnt; /* devices assigned to this domain */

16
drivers/iommu/amd/init.c
View File

@ -192,6 +192,8 @@ bool amdr_ivrs_remap_support __read_mostly;
bool amd_iommu_force_isolation __read_mostly;
unsigned long amd_iommu_pgsize_bitmap __ro_after_init = AMD_IOMMU_PGSIZES;
/*
* AMD IOMMU allows up to 2^16 different protection domains. This is a bitmap
* to know which ones are already in use.
@ -2042,14 +2044,12 @@ static int __init iommu_init_pci(struct amd_iommu *iommu)
int glxval;
u64 pasmax;
pasmax = amd_iommu_efr & FEATURE_PASID_MASK;
pasmax >>= FEATURE_PASID_SHIFT;
pasmax = FIELD_GET(FEATURE_PASMAX, amd_iommu_efr);
iommu->iommu.max_pasids = (1 << (pasmax + 1)) - 1;
BUG_ON(iommu->iommu.max_pasids & ~PASID_MASK);
glxval = amd_iommu_efr & FEATURE_GLXVAL_MASK;
glxval >>= FEATURE_GLXVAL_SHIFT;
glxval = FIELD_GET(FEATURE_GLX, amd_iommu_efr);
if (amd_iommu_max_glx_val == -1)
amd_iommu_max_glx_val = glxval;
@ -3088,7 +3088,7 @@ static int __init early_amd_iommu_init(void)
/* 5 level guest page table */
if (cpu_feature_enabled(X86_FEATURE_LA57) &&
check_feature_gpt_level() == GUEST_PGTABLE_5_LEVEL)
FIELD_GET(FEATURE_GATS, amd_iommu_efr) == GUEST_PGTABLE_5_LEVEL)
amd_iommu_gpt_level = PAGE_MODE_5_LEVEL;
/* Disable any previously enabled IOMMUs */
@ -3494,6 +3494,12 @@ static int __init parse_amd_iommu_options(char *str)
amd_iommu_pgtable = AMD_IOMMU_V2;
} else if (strncmp(str, "irtcachedis", 11) == 0) {
amd_iommu_irtcachedis = true;
} else if (strncmp(str, "nohugepages", 11) == 0) {
pr_info("Restricting V1 page-sizes to 4KiB");
amd_iommu_pgsize_bitmap = AMD_IOMMU_PGSIZES_4K;
} else if (strncmp(str, "v2_pgsizes_only", 15) == 0) {
pr_info("Restricting V1 page-sizes to 4KiB/2MiB/1GiB");
amd_iommu_pgsize_bitmap = AMD_IOMMU_PGSIZES_V2;
} else {
pr_notice("Unknown option - '%s'\n", str);
}

105
drivers/iommu/amd/io_pgtable.c
View File

@ -24,27 +24,6 @@
#include "amd_iommu.h"
#include "../iommu-pages.h"
static void v1_tlb_flush_all(void *cookie)
{
}
static void v1_tlb_flush_walk(unsigned long iova, size_t size,
size_t granule, void *cookie)
{
}
static void v1_tlb_add_page(struct iommu_iotlb_gather *gather,
unsigned long iova, size_t granule,
void *cookie)
{
}
static const struct iommu_flush_ops v1_flush_ops = {
.tlb_flush_all = v1_tlb_flush_all,
.tlb_flush_walk = v1_tlb_flush_walk,
.tlb_add_page = v1_tlb_add_page,
};
/*
* Helper function to get the first pte of a large mapping
*/
@ -132,56 +111,40 @@ static void free_sub_pt(u64 *root, int mode, struct list_head *freelist)
}
}
void amd_iommu_domain_set_pgtable(struct protection_domain *domain,
u64 *root, int mode)
{
u64 pt_root;
/* lowest 3 bits encode pgtable mode */
pt_root = mode & 7;
pt_root |= (u64)root;
amd_iommu_domain_set_pt_root(domain, pt_root);
}
/*
* 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
* to 64 bits.
*/
static bool increase_address_space(struct protection_domain *domain,
static bool increase_address_space(struct amd_io_pgtable *pgtable,
unsigned long address,
gfp_t gfp)
{
struct io_pgtable_cfg *cfg = &pgtable->pgtbl.cfg;
struct protection_domain *domain =
container_of(pgtable, struct protection_domain, iop);
unsigned long flags;
bool ret = true;
u64 *pte;
pte = iommu_alloc_page_node(domain->nid, gfp);
pte = iommu_alloc_page_node(cfg->amd.nid, gfp);
if (!pte)
return false;
spin_lock_irqsave(&domain->lock, flags);
if (address <= PM_LEVEL_SIZE(domain->iop.mode))
if (address <= PM_LEVEL_SIZE(pgtable->mode))
goto out;
ret = false;
if (WARN_ON_ONCE(domain->iop.mode == PAGE_MODE_6_LEVEL))
if (WARN_ON_ONCE(pgtable->mode == PAGE_MODE_6_LEVEL))
goto out;
*pte = PM_LEVEL_PDE(domain->iop.mode, iommu_virt_to_phys(domain->iop.root));
*pte = PM_LEVEL_PDE(pgtable->mode, iommu_virt_to_phys(pgtable->root));
domain->iop.root = pte;
domain->iop.mode += 1;
pgtable->root = pte;
pgtable->mode += 1;
amd_iommu_update_and_flush_device_table(domain);
amd_iommu_domain_flush_complete(domain);
/*
* Device Table needs to be updated and flushed before the new root can
* be published.
*/
amd_iommu_domain_set_pgtable(domain, pte, domain->iop.mode);
pte = NULL;
ret = true;
@ -193,30 +156,31 @@ out:
return ret;
}
static u64 *alloc_pte(struct protection_domain *domain,
static u64 *alloc_pte(struct amd_io_pgtable *pgtable,
unsigned long address,
unsigned long page_size,
u64 **pte_page,
gfp_t gfp,
bool *updated)
{
struct io_pgtable_cfg *cfg = &pgtable->pgtbl.cfg;
int level, end_lvl;
u64 *pte, *page;
BUG_ON(!is_power_of_2(page_size));
while (address > PM_LEVEL_SIZE(domain->iop.mode)) {
while (address > PM_LEVEL_SIZE(pgtable->mode)) {
/*
* Return an error if there is no memory to update the
* page-table.
*/
if (!increase_address_space(domain, address, gfp))
if (!increase_address_space(pgtable, address, gfp))
return NULL;
}
level = domain->iop.mode - 1;
pte = &domain->iop.root[PM_LEVEL_INDEX(level, address)];
level = pgtable->mode - 1;
pte = &pgtable->root[PM_LEVEL_INDEX(level, address)];
address = PAGE_SIZE_ALIGN(address, page_size);
end_lvl = PAGE_SIZE_LEVEL(page_size);
@ -251,7 +215,7 @@ static u64 *alloc_pte(struct protection_domain *domain,
if (!IOMMU_PTE_PRESENT(__pte) ||
pte_level == PAGE_MODE_NONE) {
page = iommu_alloc_page_node(domain->nid, gfp);
page = iommu_alloc_page_node(cfg->amd.nid, gfp);
if (!page)
return NULL;
@ -365,7 +329,7 @@ static int iommu_v1_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
phys_addr_t paddr, size_t pgsize, size_t pgcount,
int prot, gfp_t gfp, size_t *mapped)
{
struct protection_domain *dom = io_pgtable_ops_to_domain(ops);
struct amd_io_pgtable *pgtable = io_pgtable_ops_to_data(ops);
LIST_HEAD(freelist);
bool updated = false;
u64 __pte, *pte;
@ -382,7 +346,7 @@ static int iommu_v1_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
while (pgcount > 0) {
count = PAGE_SIZE_PTE_COUNT(pgsize);
pte = alloc_pte(dom, iova, pgsize, NULL, gfp, &updated);
pte = alloc_pte(pgtable, iova, pgsize, NULL, gfp, &updated);
ret = -ENOMEM;
if (!pte)
@ -419,6 +383,7 @@ static int iommu_v1_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
out:
if (updated) {
struct protection_domain *dom = io_pgtable_ops_to_domain(ops);
unsigned long flags;
spin_lock_irqsave(&dom->lock, flags);
@ -560,27 +525,17 @@ static int iommu_v1_read_and_clear_dirty(struct io_pgtable_ops *ops,
*/
static void v1_free_pgtable(struct io_pgtable *iop)
{
struct amd_io_pgtable *pgtable = container_of(iop, struct amd_io_pgtable, iop);
struct protection_domain *dom;
struct amd_io_pgtable *pgtable = container_of(iop, struct amd_io_pgtable, pgtbl);
LIST_HEAD(freelist);
if (pgtable->mode == PAGE_MODE_NONE)
return;
dom = container_of(pgtable, struct protection_domain, iop);
/* Page-table is not visible to IOMMU anymore, so free it */
BUG_ON(pgtable->mode < PAGE_MODE_NONE ||
pgtable->mode > PAGE_MODE_6_LEVEL);
free_sub_pt(pgtable->root, pgtable->mode, &freelist);
/* Update data structure */
amd_iommu_domain_clr_pt_root(dom);
/* Make changes visible to IOMMUs */
amd_iommu_domain_update(dom);
iommu_put_pages_list(&freelist);
}
@ -588,17 +543,21 @@ static struct io_pgtable *v1_alloc_pgtable(struct io_pgtable_cfg *cfg, void *coo
{
struct amd_io_pgtable *pgtable = io_pgtable_cfg_to_data(cfg);
cfg->pgsize_bitmap = AMD_IOMMU_PGSIZES;
pgtable->root = iommu_alloc_page_node(cfg->amd.nid, GFP_KERNEL);
if (!pgtable->root)
return NULL;
pgtable->mode = PAGE_MODE_3_LEVEL;
cfg->pgsize_bitmap = amd_iommu_pgsize_bitmap;
cfg->ias = IOMMU_IN_ADDR_BIT_SIZE;
cfg->oas = IOMMU_OUT_ADDR_BIT_SIZE;
cfg->tlb = &v1_flush_ops;
pgtable->iop.ops.map_pages = iommu_v1_map_pages;
pgtable->iop.ops.unmap_pages = iommu_v1_unmap_pages;
pgtable->iop.ops.iova_to_phys = iommu_v1_iova_to_phys;
pgtable->iop.ops.read_and_clear_dirty = iommu_v1_read_and_clear_dirty;
pgtable->pgtbl.ops.map_pages = iommu_v1_map_pages;
pgtable->pgtbl.ops.unmap_pages = iommu_v1_unmap_pages;
pgtable->pgtbl.ops.iova_to_phys = iommu_v1_iova_to_phys;
pgtable->pgtbl.ops.read_and_clear_dirty = iommu_v1_read_and_clear_dirty;
return &pgtable->iop;
return &pgtable->pgtbl;
}
struct io_pgtable_init_fns io_pgtable_amd_iommu_v1_init_fns = {

56
drivers/iommu/amd/io_pgtable_v2.c
View File

@ -51,7 +51,7 @@ static inline u64 set_pgtable_attr(u64 *page)
u64 prot;
prot = IOMMU_PAGE_PRESENT | IOMMU_PAGE_RW | IOMMU_PAGE_USER;
prot |= IOMMU_PAGE_ACCESS | IOMMU_PAGE_DIRTY;
prot |= IOMMU_PAGE_ACCESS;
return (iommu_virt_to_phys(page) | prot);
}
@ -233,8 +233,8 @@ static int iommu_v2_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
phys_addr_t paddr, size_t pgsize, size_t pgcount,
int prot, gfp_t gfp, size_t *mapped)
{
struct protection_domain *pdom = io_pgtable_ops_to_domain(ops);
struct io_pgtable_cfg *cfg = &pdom->iop.iop.cfg;
struct amd_io_pgtable *pgtable = io_pgtable_ops_to_data(ops);
struct io_pgtable_cfg *cfg = &pgtable->pgtbl.cfg;
u64 *pte;
unsigned long map_size;
unsigned long mapped_size = 0;
@ -251,7 +251,7 @@ static int iommu_v2_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
while (mapped_size < size) {
map_size = get_alloc_page_size(pgsize);
pte = v2_alloc_pte(pdom->nid, pdom->iop.pgd,
pte = v2_alloc_pte(cfg->amd.nid, pgtable->pgd,
iova, map_size, gfp, &updated);
if (!pte) {
ret = -EINVAL;
@ -266,8 +266,11 @@ static int iommu_v2_map_pages(struct io_pgtable_ops *ops, unsigned long iova,
}
out:
if (updated)
if (updated) {
struct protection_domain *pdom = io_pgtable_ops_to_domain(ops);
amd_iommu_domain_flush_pages(pdom, o_iova, size);
}
if (mapped)
*mapped += mapped_size;
@ -281,7 +284,7 @@ static unsigned long iommu_v2_unmap_pages(struct io_pgtable_ops *ops,
struct iommu_iotlb_gather *gather)
{
struct amd_io_pgtable *pgtable = io_pgtable_ops_to_data(ops);
struct io_pgtable_cfg *cfg = &pgtable->iop.cfg;
struct io_pgtable_cfg *cfg = &pgtable->pgtbl.cfg;
unsigned long unmap_size;
unsigned long unmapped = 0;
size_t size = pgcount << __ffs(pgsize);
@ -323,30 +326,9 @@ static phys_addr_t iommu_v2_iova_to_phys(struct io_pgtable_ops *ops, unsigned lo
/*
* ----------------------------------------------------
*/
static void v2_tlb_flush_all(void *cookie)
{
}
static void v2_tlb_flush_walk(unsigned long iova, size_t size,
size_t granule, void *cookie)
{
}
static void v2_tlb_add_page(struct iommu_iotlb_gather *gather,
unsigned long iova, size_t granule,
void *cookie)
{
}
static const struct iommu_flush_ops v2_flush_ops = {
.tlb_flush_all = v2_tlb_flush_all,
.tlb_flush_walk = v2_tlb_flush_walk,
.tlb_add_page = v2_tlb_add_page,
};
static void v2_free_pgtable(struct io_pgtable *iop)
{
struct amd_io_pgtable *pgtable = container_of(iop, struct amd_io_pgtable, iop);
struct amd_io_pgtable *pgtable = container_of(iop, struct amd_io_pgtable, pgtbl);
if (!pgtable || !pgtable->pgd)
return;
@ -359,26 +341,24 @@ static void v2_free_pgtable(struct io_pgtable *iop)
static struct io_pgtable *v2_alloc_pgtable(struct io_pgtable_cfg *cfg, void *cookie)
{
struct amd_io_pgtable *pgtable = io_pgtable_cfg_to_data(cfg);
struct protection_domain *pdom = (struct protection_domain *)cookie;
int ias = IOMMU_IN_ADDR_BIT_SIZE;
pgtable->pgd = iommu_alloc_page_node(pdom->nid, GFP_ATOMIC);
pgtable->pgd = iommu_alloc_page_node(cfg->amd.nid, GFP_KERNEL);
if (!pgtable->pgd)
return NULL;
if (get_pgtable_level() == PAGE_MODE_5_LEVEL)
ias = 57;
pgtable->iop.ops.map_pages = iommu_v2_map_pages;
pgtable->iop.ops.unmap_pages = iommu_v2_unmap_pages;
pgtable->iop.ops.iova_to_phys = iommu_v2_iova_to_phys;
pgtable->pgtbl.ops.map_pages = iommu_v2_map_pages;
pgtable->pgtbl.ops.unmap_pages = iommu_v2_unmap_pages;
pgtable->pgtbl.ops.iova_to_phys = iommu_v2_iova_to_phys;
cfg->pgsize_bitmap = AMD_IOMMU_PGSIZES_V2,
cfg->ias = ias,
cfg->oas = IOMMU_OUT_ADDR_BIT_SIZE,
cfg->tlb = &v2_flush_ops;
cfg->pgsize_bitmap = AMD_IOMMU_PGSIZES_V2;
cfg->ias = ias;
cfg->oas = IOMMU_OUT_ADDR_BIT_SIZE;
return &pgtable->iop;
return &pgtable->pgtbl;
}
struct io_pgtable_init_fns io_pgtable_amd_iommu_v2_init_fns = {

210
drivers/iommu/amd/iommu.c
View File

@ -52,8 +52,6 @@
#define HT_RANGE_START (0xfd00000000ULL)
#define HT_RANGE_END (0xffffffffffULL)
#define DEFAULT_PGTABLE_LEVEL PAGE_MODE_3_LEVEL
static DEFINE_SPINLOCK(pd_bitmap_lock);
LIST_HEAD(ioapic_map);
@ -825,10 +823,12 @@ static void iommu_poll_events(struct amd_iommu *iommu)
while (head != tail) {
iommu_print_event(iommu, iommu->evt_buf + head);
/* Update head pointer of hardware ring-buffer */
head = (head + EVENT_ENTRY_SIZE) % EVT_BUFFER_SIZE;
writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);
}
writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);
}
#ifdef CONFIG_IRQ_REMAP
@ -1247,6 +1247,22 @@ out_unlock:
return ret;
}
static void domain_flush_complete(struct protection_domain *domain)
{
int i;
for (i = 0; i < amd_iommu_get_num_iommus(); ++i) {
if (domain && !domain->dev_iommu[i])
continue;
/*
* Devices of this domain are behind this IOMMU
* We need to wait for completion of all commands.
*/
iommu_completion_wait(amd_iommus[i]);
}
}
static int iommu_flush_dte(struct amd_iommu *iommu, u16 devid)
{
struct iommu_cmd cmd;
@ -1483,7 +1499,7 @@ void amd_iommu_domain_flush_pages(struct protection_domain *domain,
__domain_flush_pages(domain, address, size);
/* Wait until IOMMU TLB and all device IOTLB flushes are complete */
amd_iommu_domain_flush_complete(domain);
domain_flush_complete(domain);
return;
}
@ -1523,7 +1539,7 @@ void amd_iommu_domain_flush_pages(struct protection_domain *domain,
}
/* Wait until IOMMU TLB and all device IOTLB flushes are complete */
amd_iommu_domain_flush_complete(domain);
domain_flush_complete(domain);
}
/* Flush the whole IO/TLB for a given protection domain - including PDE */
@ -1549,27 +1565,11 @@ void amd_iommu_dev_flush_pasid_pages(struct iommu_dev_data *dev_data,
iommu_completion_wait(iommu);
}
void amd_iommu_dev_flush_pasid_all(struct iommu_dev_data *dev_data,
ioasid_t pasid)
static void dev_flush_pasid_all(struct iommu_dev_data *dev_data,
ioasid_t pasid)
{
amd_iommu_dev_flush_pasid_pages(dev_data, 0,
CMD_INV_IOMMU_ALL_PAGES_ADDRESS, pasid);
}
void amd_iommu_domain_flush_complete(struct protection_domain *domain)
{
int i;
for (i = 0; i < amd_iommu_get_num_iommus(); ++i) {
if (domain && !domain->dev_iommu[i])
continue;
/*
* Devices of this domain are behind this IOMMU
* We need to wait for completion of all commands.
*/
iommu_completion_wait(amd_iommus[i]);
}
amd_iommu_dev_flush_pasid_pages(dev_data, pasid, 0,
CMD_INV_IOMMU_ALL_PAGES_ADDRESS);
}
/* Flush the not present cache if it exists */
@ -1589,15 +1589,7 @@ static void domain_flush_np_cache(struct protection_domain *domain,
/*
* This function flushes the DTEs for all devices in domain
*/
static void domain_flush_devices(struct protection_domain *domain)
{
struct iommu_dev_data *dev_data;
list_for_each_entry(dev_data, &domain->dev_list, list)
device_flush_dte(dev_data);
}
static void update_device_table(struct protection_domain *domain)
void amd_iommu_update_and_flush_device_table(struct protection_domain *domain)
{
struct iommu_dev_data *dev_data;
@ -1607,12 +1599,11 @@ static void update_device_table(struct protection_domain *domain)
set_dte_entry(iommu, dev_data);
clone_aliases(iommu, dev_data->dev);
}
}
void amd_iommu_update_and_flush_device_table(struct protection_domain *domain)
{
update_device_table(domain);
domain_flush_devices(domain);
list_for_each_entry(dev_data, &domain->dev_list, list)
device_flush_dte(dev_data);
domain_flush_complete(domain);
}
void amd_iommu_domain_update(struct protection_domain *domain)
@ -1816,7 +1807,7 @@ static int update_gcr3(struct iommu_dev_data *dev_data,
else
*pte = 0;
amd_iommu_dev_flush_pasid_all(dev_data, pasid);
dev_flush_pasid_all(dev_data, pasid);
return 0;
}
@ -1962,7 +1953,7 @@ static void clear_dte_entry(struct amd_iommu *iommu, u16 devid)
}
/* Update and flush DTE for the given device */
void amd_iommu_dev_update_dte(struct iommu_dev_data *dev_data, bool set)
static void dev_update_dte(struct iommu_dev_data *dev_data, bool set)
{
struct amd_iommu *iommu = get_amd_iommu_from_dev(dev_data->dev);
@ -2032,6 +2023,7 @@ static int do_attach(struct iommu_dev_data *dev_data,
struct protection_domain *domain)
{
struct amd_iommu *iommu = get_amd_iommu_from_dev_data(dev_data);
struct io_pgtable_cfg *cfg = &domain->iop.pgtbl.cfg;
int ret = 0;
/* Update data structures */
@ -2039,8 +2031,8 @@ static int do_attach(struct iommu_dev_data *dev_data,
list_add(&dev_data->list, &domain->dev_list);
/* Update NUMA Node ID */
if (domain->nid == NUMA_NO_NODE)
domain->nid = dev_to_node(dev_data->dev);
if (cfg->amd.nid == NUMA_NO_NODE)
cfg->amd.nid = dev_to_node(dev_data->dev);
/* Do reference counting */
domain->dev_iommu[iommu->index] += 1;
@ -2062,7 +2054,7 @@ static void do_detach(struct iommu_dev_data *dev_data)
struct amd_iommu *iommu = get_amd_iommu_from_dev_data(dev_data);
/* Clear DTE and flush the entry */
amd_iommu_dev_update_dte(dev_data, false);
dev_update_dte(dev_data, false);
/* Flush IOTLB and wait for the flushes to finish */
amd_iommu_domain_flush_all(domain);
@ -2185,11 +2177,12 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
dev_err(dev, "Failed to initialize - trying to proceed anyway\n");
iommu_dev = ERR_PTR(ret);
iommu_ignore_device(iommu, dev);
} else {
amd_iommu_set_pci_msi_domain(dev, iommu);
iommu_dev = &iommu->iommu;
goto out_err;
}
amd_iommu_set_pci_msi_domain(dev, iommu);
iommu_dev = &iommu->iommu;
/*
* If IOMMU and device supports PASID then it will contain max
* supported PASIDs, else it will be zero.
@ -2201,8 +2194,12 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev)
pci_max_pasids(to_pci_dev(dev)));
}
out_err:
iommu_completion_wait(iommu);
if (dev_is_pci(dev))
pci_prepare_ats(to_pci_dev(dev), PAGE_SHIFT);
return iommu_dev;
}
@ -2259,53 +2256,18 @@ static void cleanup_domain(struct protection_domain *domain)
void protection_domain_free(struct protection_domain *domain)
{
if (!domain)
return;
if (domain->iop.pgtbl_cfg.tlb)
free_io_pgtable_ops(&domain->iop.iop.ops);
if (domain->iop.root)
iommu_free_page(domain->iop.root);
if (domain->id)
domain_id_free(domain->id);
WARN_ON(!list_empty(&domain->dev_list));
if (domain->domain.type & __IOMMU_DOMAIN_PAGING)
free_io_pgtable_ops(&domain->iop.pgtbl.ops);
domain_id_free(domain->id);
kfree(domain);
}
static int protection_domain_init_v1(struct protection_domain *domain, int mode)
{
u64 *pt_root = NULL;
BUG_ON(mode < PAGE_MODE_NONE || mode > PAGE_MODE_6_LEVEL);
if (mode != PAGE_MODE_NONE) {
pt_root = iommu_alloc_page(GFP_KERNEL);
if (!pt_root)
return -ENOMEM;
}
domain->pd_mode = PD_MODE_V1;
amd_iommu_domain_set_pgtable(domain, pt_root, mode);
return 0;
}
static int protection_domain_init_v2(struct protection_domain *pdom)
{
pdom->pd_mode = PD_MODE_V2;
pdom->domain.pgsize_bitmap = AMD_IOMMU_PGSIZES_V2;
return 0;
}
struct protection_domain *protection_domain_alloc(unsigned int type)
struct protection_domain *protection_domain_alloc(unsigned int type, int nid)
{
struct io_pgtable_ops *pgtbl_ops;
struct protection_domain *domain;
int pgtable;
int ret;
domain = kzalloc(sizeof(*domain), GFP_KERNEL);
if (!domain)
@ -2313,12 +2275,12 @@ struct protection_domain *protection_domain_alloc(unsigned int type)
domain->id = domain_id_alloc();
if (!domain->id)
goto out_err;
goto err_free;
spin_lock_init(&domain->lock);
INIT_LIST_HEAD(&domain->dev_list);
INIT_LIST_HEAD(&domain->dev_data_list);
domain->nid = NUMA_NO_NODE;
domain->iop.pgtbl.cfg.amd.nid = nid;
switch (type) {
/* No need to allocate io pgtable ops in passthrough mode */
@ -2336,31 +2298,30 @@ struct protection_domain *protection_domain_alloc(unsigned int type)
pgtable = AMD_IOMMU_V1;
break;
default:
goto out_err;
goto err_id;
}
switch (pgtable) {
case AMD_IOMMU_V1:
ret = protection_domain_init_v1(domain, DEFAULT_PGTABLE_LEVEL);
domain->pd_mode = PD_MODE_V1;
break;
case AMD_IOMMU_V2:
ret = protection_domain_init_v2(domain);
domain->pd_mode = PD_MODE_V2;
break;
default:
ret = -EINVAL;
break;
goto err_id;
}
if (ret)
goto out_err;
pgtbl_ops = alloc_io_pgtable_ops(pgtable, &domain->iop.pgtbl_cfg, domain);
pgtbl_ops =
alloc_io_pgtable_ops(pgtable, &domain->iop.pgtbl.cfg, domain);
if (!pgtbl_ops)
goto out_err;
goto err_id;
return domain;
out_err:
protection_domain_free(domain);
err_id:
domain_id_free(domain->id);
err_free:
kfree(domain);
return NULL;
}
@ -2398,17 +2359,18 @@ static struct iommu_domain *do_iommu_domain_alloc(unsigned int type,
if (dirty_tracking && !amd_iommu_hd_support(iommu))
return ERR_PTR(-EOPNOTSUPP);
domain = protection_domain_alloc(type);
domain = protection_domain_alloc(type,
dev ? dev_to_node(dev) : NUMA_NO_NODE);
if (!domain)
return ERR_PTR(-ENOMEM);
domain->domain.geometry.aperture_start = 0;
domain->domain.geometry.aperture_end = dma_max_address();
domain->domain.geometry.force_aperture = true;
domain->domain.pgsize_bitmap = domain->iop.pgtbl.cfg.pgsize_bitmap;
if (iommu) {
domain->domain.type = type;
domain->domain.pgsize_bitmap = iommu->iommu.ops->pgsize_bitmap;
domain->domain.ops = iommu->iommu.ops->default_domain_ops;
if (dirty_tracking)
@ -2448,9 +2410,6 @@ void amd_iommu_domain_free(struct iommu_domain *dom)
struct protection_domain *domain;
unsigned long flags;
if (!dom)
return;
domain = to_pdomain(dom);
spin_lock_irqsave(&domain->lock, flags);
@ -2462,6 +2421,29 @@ void amd_iommu_domain_free(struct iommu_domain *dom)
protection_domain_free(domain);
}
static int blocked_domain_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct iommu_dev_data *dev_data = dev_iommu_priv_get(dev);
if (dev_data->domain)
detach_device(dev);
/* Clear DTE and flush the entry */
spin_lock(&dev_data->lock);
dev_update_dte(dev_data, false);
spin_unlock(&dev_data->lock);
return 0;
}
static struct iommu_domain blocked_domain = {
.type = IOMMU_DOMAIN_BLOCKED,
.ops = &(const struct iommu_domain_ops) {
.attach_dev = blocked_domain_attach_device,
}
};
static int amd_iommu_attach_device(struct iommu_domain *dom,
struct device *dev)
{
@ -2517,7 +2499,7 @@ static int amd_iommu_attach_device(struct iommu_domain *dom,
}
/* Update device table */
amd_iommu_dev_update_dte(dev_data, true);
dev_update_dte(dev_data, true);
return ret;
}
@ -2526,7 +2508,7 @@ static int amd_iommu_iotlb_sync_map(struct iommu_domain *dom,
unsigned long iova, size_t size)
{
struct protection_domain *domain = to_pdomain(dom);
struct io_pgtable_ops *ops = &domain->iop.iop.ops;
struct io_pgtable_ops *ops = &domain->iop.pgtbl.ops;
if (ops->map_pages)
domain_flush_np_cache(domain, iova, size);
@ -2538,7 +2520,7 @@ static int amd_iommu_map_pages(struct iommu_domain *dom, unsigned long iova,
int iommu_prot, gfp_t gfp, size_t *mapped)
{
struct protection_domain *domain = to_pdomain(dom);
struct io_pgtable_ops *ops = &domain->iop.iop.ops;
struct io_pgtable_ops *ops = &domain->iop.pgtbl.ops;
int prot = 0;
int ret = -EINVAL;
@ -2585,7 +2567,7 @@ static size_t amd_iommu_unmap_pages(struct iommu_domain *dom, unsigned long iova
struct iommu_iotlb_gather *gather)
{
struct protection_domain *domain = to_pdomain(dom);
struct io_pgtable_ops *ops = &domain->iop.iop.ops;
struct io_pgtable_ops *ops = &domain->iop.pgtbl.ops;
size_t r;
if ((domain->pd_mode == PD_MODE_V1) &&
@ -2604,7 +2586,7 @@ static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,
dma_addr_t iova)
{
struct protection_domain *domain = to_pdomain(dom);
struct io_pgtable_ops *ops = &domain->iop.iop.ops;
struct io_pgtable_ops *ops = &domain->iop.pgtbl.ops;
return ops->iova_to_phys(ops, iova);
}
@ -2682,7 +2664,7 @@ static int amd_iommu_read_and_clear_dirty(struct iommu_domain *domain,
struct iommu_dirty_bitmap *dirty)
{
struct protection_domain *pdomain = to_pdomain(domain);
struct io_pgtable_ops *ops = &pdomain->iop.iop.ops;
struct io_pgtable_ops *ops = &pdomain->iop.pgtbl.ops;
unsigned long lflags;
if (!ops || !ops->read_and_clear_dirty)
@ -2757,7 +2739,7 @@ static void amd_iommu_get_resv_regions(struct device *dev,
list_add_tail(&region->list, head);
}
bool amd_iommu_is_attach_deferred(struct device *dev)
static bool amd_iommu_is_attach_deferred(struct device *dev)
{
struct iommu_dev_data *dev_data = dev_iommu_priv_get(dev);
@ -2859,6 +2841,7 @@ static int amd_iommu_dev_disable_feature(struct device *dev,
const struct iommu_ops amd_iommu_ops = {
.capable = amd_iommu_capable,
.blocked_domain = &blocked_domain,
.domain_alloc = amd_iommu_domain_alloc,
.domain_alloc_user = amd_iommu_domain_alloc_user,
.domain_alloc_sva = amd_iommu_domain_alloc_sva,
@ -2867,7 +2850,6 @@ const struct iommu_ops amd_iommu_ops = {
.device_group = amd_iommu_device_group,
.get_resv_regions = amd_iommu_get_resv_regions,
.is_attach_deferred = amd_iommu_is_attach_deferred,
.pgsize_bitmap = AMD_IOMMU_PGSIZES,
.def_domain_type = amd_iommu_def_domain_type,
.dev_enable_feat = amd_iommu_dev_enable_feature,
.dev_disable_feat = amd_iommu_dev_disable_feature,

2
drivers/iommu/amd/pasid.c
View File

@ -181,7 +181,7 @@ struct iommu_domain *amd_iommu_domain_alloc_sva(struct device *dev,
struct protection_domain *pdom;
int ret;
pdom = protection_domain_alloc(IOMMU_DOMAIN_SVA);
pdom = protection_domain_alloc(IOMMU_DOMAIN_SVA, dev_to_node(dev));
if (!pdom)
return ERR_PTR(-ENOMEM);

1
drivers/iommu/arm/arm-smmu-v3/Makefile
View File

@ -2,5 +2,6 @@
obj-$(CONFIG_ARM_SMMU_V3) += arm_smmu_v3.o
arm_smmu_v3-y := arm-smmu-v3.o
arm_smmu_v3-$(CONFIG_ARM_SMMU_V3_SVA) += arm-smmu-v3-sva.o
arm_smmu_v3-$(CONFIG_TEGRA241_CMDQV) += tegra241-cmdqv.o
obj-$(CONFIG_ARM_SMMU_V3_KUNIT_TEST) += arm-smmu-v3-test.o

83
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-test.c
View File

@ -30,6 +30,11 @@ static struct mm_struct sva_mm = {
.pgd = (void *)0xdaedbeefdeadbeefULL,
};
enum arm_smmu_test_master_feat {
ARM_SMMU_MASTER_TEST_ATS = BIT(0),
ARM_SMMU_MASTER_TEST_STALL = BIT(1),
};
static bool arm_smmu_entry_differs_in_used_bits(const __le64 *entry,
const __le64 *used_bits,
const __le64 *target,
@ -164,16 +169,22 @@ static const dma_addr_t fake_cdtab_dma_addr = 0xF0F0F0F0F0F0;
static void arm_smmu_test_make_cdtable_ste(struct arm_smmu_ste *ste,
unsigned int s1dss,
const dma_addr_t dma_addr)
const dma_addr_t dma_addr,
enum arm_smmu_test_master_feat feat)
{
bool ats_enabled = feat & ARM_SMMU_MASTER_TEST_ATS;
bool stall_enabled = feat & ARM_SMMU_MASTER_TEST_STALL;
struct arm_smmu_master master = {
.ats_enabled = ats_enabled,
.cd_table.cdtab_dma = dma_addr,
.cd_table.s1cdmax = 0xFF,
.cd_table.s1fmt = STRTAB_STE_0_S1FMT_64K_L2,
.smmu = &smmu,
.stall_enabled = stall_enabled,
};
arm_smmu_make_cdtable_ste(ste, &master, true, s1dss);
arm_smmu_make_cdtable_ste(ste, &master, ats_enabled, s1dss);
}
static void arm_smmu_v3_write_ste_test_bypass_to_abort(struct kunit *test)
@ -204,7 +215,7 @@ static void arm_smmu_v3_write_ste_test_cdtable_to_abort(struct kunit *test)
struct arm_smmu_ste ste;
arm_smmu_test_make_cdtable_ste(&ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &ste, &abort_ste,
NUM_EXPECTED_SYNCS(2));
}
@ -214,7 +225,7 @@ static void arm_smmu_v3_write_ste_test_abort_to_cdtable(struct kunit *test)
struct arm_smmu_ste ste;
arm_smmu_test_make_cdtable_ste(&ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &abort_ste, &ste,
NUM_EXPECTED_SYNCS(2));
}
@ -224,7 +235,7 @@ static void arm_smmu_v3_write_ste_test_cdtable_to_bypass(struct kunit *test)
struct arm_smmu_ste ste;
arm_smmu_test_make_cdtable_ste(&ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &ste, &bypass_ste,
NUM_EXPECTED_SYNCS(3));
}
@ -234,7 +245,7 @@ static void arm_smmu_v3_write_ste_test_bypass_to_cdtable(struct kunit *test)
struct arm_smmu_ste ste;
arm_smmu_test_make_cdtable_ste(&ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &bypass_ste, &ste,
NUM_EXPECTED_SYNCS(3));
}
@ -245,9 +256,9 @@ static void arm_smmu_v3_write_ste_test_cdtable_s1dss_change(struct kunit *test)
struct arm_smmu_ste s1dss_bypass;
arm_smmu_test_make_cdtable_ste(&ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_test_make_cdtable_ste(&s1dss_bypass, STRTAB_STE_1_S1DSS_BYPASS,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
/*
* Flipping s1dss on a CD table STE only involves changes to the second
@ -265,7 +276,7 @@ arm_smmu_v3_write_ste_test_s1dssbypass_to_stebypass(struct kunit *test)
struct arm_smmu_ste s1dss_bypass;
arm_smmu_test_make_cdtable_ste(&s1dss_bypass, STRTAB_STE_1_S1DSS_BYPASS,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(
test, &s1dss_bypass, &bypass_ste, NUM_EXPECTED_SYNCS(2));
}
@ -276,16 +287,20 @@ arm_smmu_v3_write_ste_test_stebypass_to_s1dssbypass(struct kunit *test)
struct arm_smmu_ste s1dss_bypass;
arm_smmu_test_make_cdtable_ste(&s1dss_bypass, STRTAB_STE_1_S1DSS_BYPASS,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(
test, &bypass_ste, &s1dss_bypass, NUM_EXPECTED_SYNCS(2));
}
static void arm_smmu_test_make_s2_ste(struct arm_smmu_ste *ste,
bool ats_enabled)
enum arm_smmu_test_master_feat feat)
{
bool ats_enabled = feat & ARM_SMMU_MASTER_TEST_ATS;
bool stall_enabled = feat & ARM_SMMU_MASTER_TEST_STALL;
struct arm_smmu_master master = {
.ats_enabled = ats_enabled,
.smmu = &smmu,
.stall_enabled = stall_enabled,
};
struct io_pgtable io_pgtable = {};
struct arm_smmu_domain smmu_domain = {
@ -308,7 +323,7 @@ static void arm_smmu_v3_write_ste_test_s2_to_abort(struct kunit *test)
{
struct arm_smmu_ste ste;
arm_smmu_test_make_s2_ste(&ste, true);
arm_smmu_test_make_s2_ste(&ste, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &ste, &abort_ste,
NUM_EXPECTED_SYNCS(2));
}
@ -317,7 +332,7 @@ static void arm_smmu_v3_write_ste_test_abort_to_s2(struct kunit *test)
{
struct arm_smmu_ste ste;
arm_smmu_test_make_s2_ste(&ste, true);
arm_smmu_test_make_s2_ste(&ste, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &abort_ste, &ste,
NUM_EXPECTED_SYNCS(2));
}
@ -326,7 +341,7 @@ static void arm_smmu_v3_write_ste_test_s2_to_bypass(struct kunit *test)
{
struct arm_smmu_ste ste;
arm_smmu_test_make_s2_ste(&ste, true);
arm_smmu_test_make_s2_ste(&ste, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &ste, &bypass_ste,
NUM_EXPECTED_SYNCS(2));
}
@ -335,7 +350,7 @@ static void arm_smmu_v3_write_ste_test_bypass_to_s2(struct kunit *test)
{
struct arm_smmu_ste ste;
arm_smmu_test_make_s2_ste(&ste, true);
arm_smmu_test_make_s2_ste(&ste, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &bypass_ste, &ste,
NUM_EXPECTED_SYNCS(2));
}
@ -346,8 +361,8 @@ static void arm_smmu_v3_write_ste_test_s1_to_s2(struct kunit *test)
struct arm_smmu_ste s2_ste;
arm_smmu_test_make_cdtable_ste(&s1_ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr);
arm_smmu_test_make_s2_ste(&s2_ste, true);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_test_make_s2_ste(&s2_ste, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &s1_ste, &s2_ste,
NUM_EXPECTED_SYNCS(3));
}
@ -358,8 +373,8 @@ static void arm_smmu_v3_write_ste_test_s2_to_s1(struct kunit *test)
struct arm_smmu_ste s2_ste;
arm_smmu_test_make_cdtable_ste(&s1_ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr);
arm_smmu_test_make_s2_ste(&s2_ste, true);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_test_make_s2_ste(&s2_ste, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &s2_ste, &s1_ste,
NUM_EXPECTED_SYNCS(3));
}
@ -375,9 +390,9 @@ static void arm_smmu_v3_write_ste_test_non_hitless(struct kunit *test)
* s1 dss field in the same update.
*/
arm_smmu_test_make_cdtable_ste(&ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr);
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_test_make_cdtable_ste(&ste_2, STRTAB_STE_1_S1DSS_BYPASS,
0x4B4B4b4B4B);
0x4B4B4b4B4B, ARM_SMMU_MASTER_TEST_ATS);
arm_smmu_v3_test_ste_expect_non_hitless_transition(
test, &ste, &ste_2, NUM_EXPECTED_SYNCS(3));
}
@ -503,6 +518,30 @@ static void arm_smmu_test_make_sva_release_cd(struct arm_smmu_cd *cd,
arm_smmu_make_sva_cd(cd, &master, NULL, asid);
}
static void arm_smmu_v3_write_ste_test_s1_to_s2_stall(struct kunit *test)
{
struct arm_smmu_ste s1_ste;
struct arm_smmu_ste s2_ste;
arm_smmu_test_make_cdtable_ste(&s1_ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_STALL);
arm_smmu_test_make_s2_ste(&s2_ste, ARM_SMMU_MASTER_TEST_STALL);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &s1_ste, &s2_ste,
NUM_EXPECTED_SYNCS(3));
}
static void arm_smmu_v3_write_ste_test_s2_to_s1_stall(struct kunit *test)
{
struct arm_smmu_ste s1_ste;
struct arm_smmu_ste s2_ste;
arm_smmu_test_make_cdtable_ste(&s1_ste, STRTAB_STE_1_S1DSS_SSID0,
fake_cdtab_dma_addr, ARM_SMMU_MASTER_TEST_STALL);
arm_smmu_test_make_s2_ste(&s2_ste, ARM_SMMU_MASTER_TEST_STALL);
arm_smmu_v3_test_ste_expect_hitless_transition(test, &s2_ste, &s1_ste,
NUM_EXPECTED_SYNCS(3));
}
static void arm_smmu_v3_write_cd_test_sva_clear(struct kunit *test)
{
struct arm_smmu_cd cd = {};
@ -547,6 +586,8 @@ static struct kunit_case arm_smmu_v3_test_cases[] = {
KUNIT_CASE(arm_smmu_v3_write_ste_test_non_hitless),
KUNIT_CASE(arm_smmu_v3_write_cd_test_s1_clear),
KUNIT_CASE(arm_smmu_v3_write_cd_test_s1_change_asid),
KUNIT_CASE(arm_smmu_v3_write_ste_test_s1_to_s2_stall),
KUNIT_CASE(arm_smmu_v3_write_ste_test_s2_to_s1_stall),
KUNIT_CASE(arm_smmu_v3_write_cd_test_sva_clear),
KUNIT_CASE(arm_smmu_v3_write_cd_test_sva_release),
{},

582
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
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File diff suppressed because it is too large Load Diff

137
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
View File

@ -14,6 +14,8 @@
#include <linux/mmzone.h>
#include <linux/sizes.h>
struct arm_smmu_device;
/* MMIO registers */
#define ARM_SMMU_IDR0 0x0
#define IDR0_ST_LVL GENMASK(28, 27)
@ -202,10 +204,8 @@
* 2lvl: 128k L1 entries,
* 256 lazy entries per table (each table covers a PCI bus)
*/
#define STRTAB_L1_SZ_SHIFT 20
#define STRTAB_SPLIT 8
#define STRTAB_L1_DESC_DWORDS 1
#define STRTAB_L1_DESC_SPAN GENMASK_ULL(4, 0)
#define STRTAB_L1_DESC_L2PTR_MASK GENMASK_ULL(51, 6)
@ -215,6 +215,26 @@ struct arm_smmu_ste {
__le64 data[STRTAB_STE_DWORDS];
};
#define STRTAB_NUM_L2_STES (1 << STRTAB_SPLIT)
struct arm_smmu_strtab_l2 {
struct arm_smmu_ste stes[STRTAB_NUM_L2_STES];
};
struct arm_smmu_strtab_l1 {
__le64 l2ptr;
};
#define STRTAB_MAX_L1_ENTRIES (1 << 17)
static inline u32 arm_smmu_strtab_l1_idx(u32 sid)
{
return sid / STRTAB_NUM_L2_STES;
}
static inline u32 arm_smmu_strtab_l2_idx(u32 sid)
{
return sid % STRTAB_NUM_L2_STES;
}
#define STRTAB_STE_0_V (1UL << 0)
#define STRTAB_STE_0_CFG GENMASK_ULL(3, 1)
#define STRTAB_STE_0_CFG_ABORT 0
@ -267,6 +287,7 @@ struct arm_smmu_ste {
#define STRTAB_STE_2_S2AA64 (1UL << 51)
#define STRTAB_STE_2_S2ENDI (1UL << 52)
#define STRTAB_STE_2_S2PTW (1UL << 54)
#define STRTAB_STE_2_S2S (1UL << 57)
#define STRTAB_STE_2_S2R (1UL << 58)
#define STRTAB_STE_3_S2TTB_MASK GENMASK_ULL(51, 4)
@ -280,7 +301,6 @@ struct arm_smmu_ste {
*/
#define CTXDESC_L2_ENTRIES 1024
#define CTXDESC_L1_DESC_DWORDS 1
#define CTXDESC_L1_DESC_V (1UL << 0)
#define CTXDESC_L1_DESC_L2PTR_MASK GENMASK_ULL(51, 12)
@ -290,6 +310,24 @@ struct arm_smmu_cd {
__le64 data[CTXDESC_CD_DWORDS];
};
struct arm_smmu_cdtab_l2 {
struct arm_smmu_cd cds[CTXDESC_L2_ENTRIES];
};
struct arm_smmu_cdtab_l1 {
__le64 l2ptr;
};
static inline unsigned int arm_smmu_cdtab_l1_idx(unsigned int ssid)
{
return ssid / CTXDESC_L2_ENTRIES;
}
static inline unsigned int arm_smmu_cdtab_l2_idx(unsigned int ssid)
{
return ssid % CTXDESC_L2_ENTRIES;
}
#define CTXDESC_CD_0_TCR_T0SZ GENMASK_ULL(5, 0)
#define CTXDESC_CD_0_TCR_TG0 GENMASK_ULL(7, 6)
#define CTXDESC_CD_0_TCR_IRGN0 GENMASK_ULL(9, 8)
@ -320,7 +358,7 @@ struct arm_smmu_cd {
* When the SMMU only supports linear context descriptor tables, pick a
* reasonable size limit (64kB).
*/
#define CTXDESC_LINEAR_CDMAX ilog2(SZ_64K / (CTXDESC_CD_DWORDS << 3))
#define CTXDESC_LINEAR_CDMAX ilog2(SZ_64K / sizeof(struct arm_smmu_cd))
/* Command queue */
#define CMDQ_ENT_SZ_SHIFT 4
@ -566,10 +604,18 @@ struct arm_smmu_cmdq {
atomic_long_t *valid_map;
atomic_t owner_prod;
atomic_t lock;
bool (*supports_cmd)(struct arm_smmu_cmdq_ent *ent);
};
static inline bool arm_smmu_cmdq_supports_cmd(struct arm_smmu_cmdq *cmdq,
struct arm_smmu_cmdq_ent *ent)
{
return cmdq->supports_cmd ? cmdq->supports_cmd(ent) : true;
}
struct arm_smmu_cmdq_batch {
u64 cmds[CMDQ_BATCH_ENTRIES * CMDQ_ENT_DWORDS];
struct arm_smmu_cmdq *cmdq;
int num;
};
@ -584,24 +630,23 @@ struct arm_smmu_priq {
};
/* High-level stream table and context descriptor structures */
struct arm_smmu_strtab_l1_desc {
struct arm_smmu_ste *l2ptr;
};
struct arm_smmu_ctx_desc {
u16 asid;
};
struct arm_smmu_l1_ctx_desc {
struct arm_smmu_cd *l2ptr;
dma_addr_t l2ptr_dma;
};
struct arm_smmu_ctx_desc_cfg {
__le64 *cdtab;
union {
struct {
struct arm_smmu_cd *table;
unsigned int num_ents;
} linear;
struct {
struct arm_smmu_cdtab_l1 *l1tab;
struct arm_smmu_cdtab_l2 **l2ptrs;
unsigned int num_l1_ents;
} l2;
};
dma_addr_t cdtab_dma;
struct arm_smmu_l1_ctx_desc *l1_desc;
unsigned int num_l1_ents;
unsigned int used_ssids;
u8 in_ste;
u8 s1fmt;
@ -609,6 +654,12 @@ struct arm_smmu_ctx_desc_cfg {
u8 s1cdmax;
};
static inline bool
arm_smmu_cdtab_allocated(struct arm_smmu_ctx_desc_cfg *cfg)
{
return cfg->linear.table || cfg->l2.l1tab;
}
/* True if the cd table has SSIDS > 0 in use. */
static inline bool arm_smmu_ssids_in_use(struct arm_smmu_ctx_desc_cfg *cd_table)
{
@ -620,18 +671,35 @@ struct arm_smmu_s2_cfg {
};
struct arm_smmu_strtab_cfg {
__le64 *strtab;
dma_addr_t strtab_dma;
struct arm_smmu_strtab_l1_desc *l1_desc;
unsigned int num_l1_ents;
union {
struct {
struct arm_smmu_ste *table;
dma_addr_t ste_dma;
unsigned int num_ents;
} linear;
struct {
struct arm_smmu_strtab_l1 *l1tab;
struct arm_smmu_strtab_l2 **l2ptrs;
dma_addr_t l1_dma;
unsigned int num_l1_ents;
} l2;
};
};
u64 strtab_base;
u32 strtab_base_cfg;
struct arm_smmu_impl_ops {
int (*device_reset)(struct arm_smmu_device *smmu);
void (*device_remove)(struct arm_smmu_device *smmu);
int (*init_structures)(struct arm_smmu_device *smmu);
struct arm_smmu_cmdq *(*get_secondary_cmdq)(
struct arm_smmu_device *smmu, struct arm_smmu_cmdq_ent *ent);
};
/* An SMMUv3 instance */
struct arm_smmu_device {
struct device *dev;
struct device *impl_dev;
const struct arm_smmu_impl_ops *impl_ops;
void __iomem *base;
void __iomem *page1;
@ -664,6 +732,7 @@ struct arm_smmu_device {
#define ARM_SMMU_OPT_PAGE0_REGS_ONLY (1 << 1)
#define ARM_SMMU_OPT_MSIPOLL (1 << 2)
#define ARM_SMMU_OPT_CMDQ_FORCE_SYNC (1 << 3)
#define ARM_SMMU_OPT_TEGRA241_CMDQV (1 << 4)
u32 options;
struct arm_smmu_cmdq cmdq;
@ -815,6 +884,15 @@ void arm_smmu_tlb_inv_range_asid(unsigned long iova, size_t size, int asid,
int arm_smmu_atc_inv_domain(struct arm_smmu_domain *smmu_domain,
unsigned long iova, size_t size);
void __arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq);
int arm_smmu_init_one_queue(struct arm_smmu_device *smmu,
struct arm_smmu_queue *q, void __iomem *page,
unsigned long prod_off, unsigned long cons_off,
size_t dwords, const char *name);
int arm_smmu_cmdq_init(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq);
#ifdef CONFIG_ARM_SMMU_V3_SVA
bool arm_smmu_sva_supported(struct arm_smmu_device *smmu);
bool arm_smmu_master_sva_supported(struct arm_smmu_master *master);
@ -860,10 +938,15 @@ static inline void arm_smmu_sva_notifier_synchronize(void) {}
#define arm_smmu_sva_domain_alloc NULL
static inline void arm_smmu_sva_remove_dev_pasid(struct iommu_domain *domain,
struct device *dev,
ioasid_t id)
{
}
#endif /* CONFIG_ARM_SMMU_V3_SVA */
#ifdef CONFIG_TEGRA241_CMDQV
struct arm_smmu_device *tegra241_cmdqv_probe(struct arm_smmu_device *smmu);
#else /* CONFIG_TEGRA241_CMDQV */
static inline struct arm_smmu_device *
tegra241_cmdqv_probe(struct arm_smmu_device *smmu)
{
return ERR_PTR(-ENODEV);
}
#endif /* CONFIG_TEGRA241_CMDQV */
#endif /* _ARM_SMMU_V3_H */

909
drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c Normal file
View File

@ -0,0 +1,909 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (C) 2021-2024 NVIDIA CORPORATION & AFFILIATES. */
#define dev_fmt(fmt) "tegra241_cmdqv: " fmt
#include <linux/acpi.h>
#include <linux/debugfs.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/iommu.h>
#include <linux/iopoll.h>
#include <acpi/acpixf.h>
#include "arm-smmu-v3.h"
/* CMDQV register page base and size defines */
#define TEGRA241_CMDQV_CONFIG_BASE (0)
#define TEGRA241_CMDQV_CONFIG_SIZE (SZ_64K)
#define TEGRA241_VCMDQ_PAGE0_BASE (TEGRA241_CMDQV_CONFIG_BASE + SZ_64K)
#define TEGRA241_VCMDQ_PAGE1_BASE (TEGRA241_VCMDQ_PAGE0_BASE + SZ_64K)
#define TEGRA241_VINTF_PAGE_BASE (TEGRA241_VCMDQ_PAGE1_BASE + SZ_64K)
/* CMDQV global base regs */
#define TEGRA241_CMDQV_CONFIG 0x0000
#define CMDQV_EN BIT(0)
#define TEGRA241_CMDQV_PARAM 0x0004
#define CMDQV_NUM_VINTF_LOG2 GENMASK(11, 8)
#define CMDQV_NUM_VCMDQ_LOG2 GENMASK(7, 4)
#define TEGRA241_CMDQV_STATUS 0x0008
#define CMDQV_ENABLED BIT(0)
#define TEGRA241_CMDQV_VINTF_ERR_MAP 0x0014
#define TEGRA241_CMDQV_VINTF_INT_MASK 0x001C
#define TEGRA241_CMDQV_CMDQ_ERR_MAP(m) (0x0024 + 0x4*(m))
#define TEGRA241_CMDQV_CMDQ_ALLOC(q) (0x0200 + 0x4*(q))
#define CMDQV_CMDQ_ALLOC_VINTF GENMASK(20, 15)
#define CMDQV_CMDQ_ALLOC_LVCMDQ GENMASK(7, 1)
#define CMDQV_CMDQ_ALLOCATED BIT(0)
/* VINTF base regs */
#define TEGRA241_VINTF(v) (0x1000 + 0x100*(v))
#define TEGRA241_VINTF_CONFIG 0x0000
#define VINTF_HYP_OWN BIT(17)
#define VINTF_VMID GENMASK(16, 1)
#define VINTF_EN BIT(0)
#define TEGRA241_VINTF_STATUS 0x0004
#define VINTF_STATUS GENMASK(3, 1)
#define VINTF_ENABLED BIT(0)
#define TEGRA241_VINTF_LVCMDQ_ERR_MAP_64(m) \
(0x00C0 + 0x8*(m))
#define LVCMDQ_ERR_MAP_NUM_64 2
/* VCMDQ base regs */
/* -- PAGE0 -- */
#define TEGRA241_VCMDQ_PAGE0(q) (TEGRA241_VCMDQ_PAGE0_BASE + 0x80*(q))
#define TEGRA241_VCMDQ_CONS 0x00000
#define VCMDQ_CONS_ERR GENMASK(30, 24)
#define TEGRA241_VCMDQ_PROD 0x00004
#define TEGRA241_VCMDQ_CONFIG 0x00008
#define VCMDQ_EN BIT(0)
#define TEGRA241_VCMDQ_STATUS 0x0000C
#define VCMDQ_ENABLED BIT(0)
#define TEGRA241_VCMDQ_GERROR 0x00010
#define TEGRA241_VCMDQ_GERRORN 0x00014
/* -- PAGE1 -- */
#define TEGRA241_VCMDQ_PAGE1(q) (TEGRA241_VCMDQ_PAGE1_BASE + 0x80*(q))
#define VCMDQ_ADDR GENMASK(47, 5)
#define VCMDQ_LOG2SIZE GENMASK(4, 0)
#define VCMDQ_LOG2SIZE_MAX 19
#define TEGRA241_VCMDQ_BASE 0x00000
#define TEGRA241_VCMDQ_CONS_INDX_BASE 0x00008
/* VINTF logical-VCMDQ pages */
#define TEGRA241_VINTFi_PAGE0(i) (TEGRA241_VINTF_PAGE_BASE + SZ_128K*(i))
#define TEGRA241_VINTFi_PAGE1(i) (TEGRA241_VINTFi_PAGE0(i) + SZ_64K)
#define TEGRA241_VINTFi_LVCMDQ_PAGE0(i, q) \
(TEGRA241_VINTFi_PAGE0(i) + 0x80*(q))
#define TEGRA241_VINTFi_LVCMDQ_PAGE1(i, q) \
(TEGRA241_VINTFi_PAGE1(i) + 0x80*(q))
/* MMIO helpers */
#define REG_CMDQV(_cmdqv, _regname) \
((_cmdqv)->base + TEGRA241_CMDQV_##_regname)
#define REG_VINTF(_vintf, _regname) \
((_vintf)->base + TEGRA241_VINTF_##_regname)
#define REG_VCMDQ_PAGE0(_vcmdq, _regname) \
((_vcmdq)->page0 + TEGRA241_VCMDQ_##_regname)
#define REG_VCMDQ_PAGE1(_vcmdq, _regname) \
((_vcmdq)->page1 + TEGRA241_VCMDQ_##_regname)
static bool disable_cmdqv;
module_param(disable_cmdqv, bool, 0444);
MODULE_PARM_DESC(disable_cmdqv,
"This allows to disable CMDQV HW and use default SMMU internal CMDQ.");
static bool bypass_vcmdq;
module_param(bypass_vcmdq, bool, 0444);
MODULE_PARM_DESC(bypass_vcmdq,
"This allows to bypass VCMDQ for debugging use or perf comparison.");
/**
* struct tegra241_vcmdq - Virtual Command Queue
* @idx: Global index in the CMDQV
* @lidx: Local index in the VINTF
* @enabled: Enable status
* @cmdqv: Parent CMDQV pointer
* @vintf: Parent VINTF pointer
* @cmdq: Command Queue struct
* @page0: MMIO Page0 base address
* @page1: MMIO Page1 base address
*/
struct tegra241_vcmdq {
u16 idx;
u16 lidx;
bool enabled;
struct tegra241_cmdqv *cmdqv;
struct tegra241_vintf *vintf;
struct arm_smmu_cmdq cmdq;
void __iomem *page0;
void __iomem *page1;
};
/**
* struct tegra241_vintf - Virtual Interface
* @idx: Global index in the CMDQV
* @enabled: Enable status
* @hyp_own: Owned by hypervisor (in-kernel)
* @cmdqv: Parent CMDQV pointer
* @lvcmdqs: List of logical VCMDQ pointers
* @base: MMIO base address
*/
struct tegra241_vintf {
u16 idx;
bool enabled;
bool hyp_own;
struct tegra241_cmdqv *cmdqv;
struct tegra241_vcmdq **lvcmdqs;
void __iomem *base;
};
/**
* struct tegra241_cmdqv - CMDQ-V for SMMUv3
* @smmu: SMMUv3 device
* @dev: CMDQV device
* @base: MMIO base address
* @irq: IRQ number
* @num_vintfs: Total number of VINTFs
* @num_vcmdqs: Total number of VCMDQs
* @num_lvcmdqs_per_vintf: Number of logical VCMDQs per VINTF
* @vintf_ids: VINTF id allocator
* @vintfs: List of VINTFs
*/
struct tegra241_cmdqv {
struct arm_smmu_device smmu;
struct device *dev;
void __iomem *base;
int irq;
/* CMDQV Hardware Params */
u16 num_vintfs;
u16 num_vcmdqs;
u16 num_lvcmdqs_per_vintf;
struct ida vintf_ids;
struct tegra241_vintf **vintfs;
};
/* Config and Polling Helpers */
static inline int tegra241_cmdqv_write_config(struct tegra241_cmdqv *cmdqv,
void __iomem *addr_config,
void __iomem *addr_status,
u32 regval, const char *header,
bool *out_enabled)
{
bool en = regval & BIT(0);
int ret;
writel(regval, addr_config);
ret = readl_poll_timeout(addr_status, regval,
en ? regval & BIT(0) : !(regval & BIT(0)),
1, ARM_SMMU_POLL_TIMEOUT_US);
if (ret)
dev_err(cmdqv->dev, "%sfailed to %sable, STATUS=0x%08X\n",
header, en ? "en" : "dis", regval);
if (out_enabled)
WRITE_ONCE(*out_enabled, regval & BIT(0));
return ret;
}
static inline int cmdqv_write_config(struct tegra241_cmdqv *cmdqv, u32 regval)
{
return tegra241_cmdqv_write_config(cmdqv,
REG_CMDQV(cmdqv, CONFIG),
REG_CMDQV(cmdqv, STATUS),
regval, "CMDQV: ", NULL);
}
static inline int vintf_write_config(struct tegra241_vintf *vintf, u32 regval)
{
char header[16];
snprintf(header, 16, "VINTF%u: ", vintf->idx);
return tegra241_cmdqv_write_config(vintf->cmdqv,
REG_VINTF(vintf, CONFIG),
REG_VINTF(vintf, STATUS),
regval, header, &vintf->enabled);
}
static inline char *lvcmdq_error_header(struct tegra241_vcmdq *vcmdq,
char *header, int hlen)
{
WARN_ON(hlen < 64);
if (WARN_ON(!vcmdq->vintf))
return "";
snprintf(header, hlen, "VINTF%u: VCMDQ%u/LVCMDQ%u: ",
vcmdq->vintf->idx, vcmdq->idx, vcmdq->lidx);
return header;
}
static inline int vcmdq_write_config(struct tegra241_vcmdq *vcmdq, u32 regval)
{
char header[64], *h = lvcmdq_error_header(vcmdq, header, 64);
return tegra241_cmdqv_write_config(vcmdq->cmdqv,
REG_VCMDQ_PAGE0(vcmdq, CONFIG),
REG_VCMDQ_PAGE0(vcmdq, STATUS),
regval, h, &vcmdq->enabled);
}
/* ISR Functions */
static void tegra241_vintf0_handle_error(struct tegra241_vintf *vintf)
{
int i;
for (i = 0; i < LVCMDQ_ERR_MAP_NUM_64; i++) {
u64 map = readq_relaxed(REG_VINTF(vintf, LVCMDQ_ERR_MAP_64(i)));
while (map) {
unsigned long lidx = __ffs64(map);
struct tegra241_vcmdq *vcmdq = vintf->lvcmdqs[lidx];
u32 gerror = readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, GERROR));
__arm_smmu_cmdq_skip_err(&vintf->cmdqv->smmu, &vcmdq->cmdq);
writel(gerror, REG_VCMDQ_PAGE0(vcmdq, GERRORN));
map &= ~BIT_ULL(lidx);
}
}
}
static irqreturn_t tegra241_cmdqv_isr(int irq, void *devid)
{
struct tegra241_cmdqv *cmdqv = (struct tegra241_cmdqv *)devid;
void __iomem *reg_vintf_map = REG_CMDQV(cmdqv, VINTF_ERR_MAP);
char err_str[256];
u64 vintf_map;
/* Use readl_relaxed() as register addresses are not 64-bit aligned */
vintf_map = (u64)readl_relaxed(reg_vintf_map + 0x4) << 32 |
(u64)readl_relaxed(reg_vintf_map);
snprintf(err_str, sizeof(err_str),
"vintf_map: %016llx, vcmdq_map %08x:%08x:%08x:%08x", vintf_map,
readl_relaxed(REG_CMDQV(cmdqv, CMDQ_ERR_MAP(3))),
readl_relaxed(REG_CMDQV(cmdqv, CMDQ_ERR_MAP(2))),
readl_relaxed(REG_CMDQV(cmdqv, CMDQ_ERR_MAP(1))),
readl_relaxed(REG_CMDQV(cmdqv, CMDQ_ERR_MAP(0))));
dev_warn(cmdqv->dev, "unexpected error reported. %s\n", err_str);
/* Handle VINTF0 and its LVCMDQs */
if (vintf_map & BIT_ULL(0)) {
tegra241_vintf0_handle_error(cmdqv->vintfs[0]);
vintf_map &= ~BIT_ULL(0);
}
return IRQ_HANDLED;
}
/* Command Queue Function */
static bool tegra241_guest_vcmdq_supports_cmd(struct arm_smmu_cmdq_ent *ent)
{
switch (ent->opcode) {
case CMDQ_OP_TLBI_NH_ASID:
case CMDQ_OP_TLBI_NH_VA:
case CMDQ_OP_ATC_INV:
return true;
default:
return false;
}
}
static struct arm_smmu_cmdq *
tegra241_cmdqv_get_cmdq(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq_ent *ent)
{
struct tegra241_cmdqv *cmdqv =
container_of(smmu, struct tegra241_cmdqv, smmu);
struct tegra241_vintf *vintf = cmdqv->vintfs[0];
struct tegra241_vcmdq *vcmdq;
u16 lidx;
if (READ_ONCE(bypass_vcmdq))
return NULL;
/* Use SMMU CMDQ if VINTF0 is uninitialized */
if (!READ_ONCE(vintf->enabled))
return NULL;
/*
* Select a LVCMDQ to use. Here we use a temporal solution to
* balance out traffic on cmdq issuing: each cmdq has its own
* lock, if all cpus issue cmdlist using the same cmdq, only
* one CPU at a time can enter the process, while the others
* will be spinning at the same lock.
*/
lidx = smp_processor_id() % cmdqv->num_lvcmdqs_per_vintf;
vcmdq = vintf->lvcmdqs[lidx];
if (!vcmdq || !READ_ONCE(vcmdq->enabled))
return NULL;
/* Unsupported CMD goes for smmu->cmdq pathway */
if (!arm_smmu_cmdq_supports_cmd(&vcmdq->cmdq, ent))
return NULL;
return &vcmdq->cmdq;
}
/* HW Reset Functions */
static void tegra241_vcmdq_hw_deinit(struct tegra241_vcmdq *vcmdq)
{
char header[64], *h = lvcmdq_error_header(vcmdq, header, 64);
u32 gerrorn, gerror;
if (vcmdq_write_config(vcmdq, 0)) {
dev_err(vcmdq->cmdqv->dev,
"%sGERRORN=0x%X, GERROR=0x%X, CONS=0x%X\n", h,
readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, GERRORN)),
readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, GERROR)),
readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, CONS)));
}
writel_relaxed(0, REG_VCMDQ_PAGE0(vcmdq, PROD));
writel_relaxed(0, REG_VCMDQ_PAGE0(vcmdq, CONS));
writeq_relaxed(0, REG_VCMDQ_PAGE1(vcmdq, BASE));
writeq_relaxed(0, REG_VCMDQ_PAGE1(vcmdq, CONS_INDX_BASE));
gerrorn = readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, GERRORN));
gerror = readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, GERROR));
if (gerror != gerrorn) {
dev_warn(vcmdq->cmdqv->dev,
"%suncleared error detected, resetting\n", h);
writel(gerror, REG_VCMDQ_PAGE0(vcmdq, GERRORN));
}
dev_dbg(vcmdq->cmdqv->dev, "%sdeinited\n", h);
}
static int tegra241_vcmdq_hw_init(struct tegra241_vcmdq *vcmdq)
{
char header[64], *h = lvcmdq_error_header(vcmdq, header, 64);
int ret;
/* Reset VCMDQ */
tegra241_vcmdq_hw_deinit(vcmdq);
/* Configure and enable VCMDQ */
writeq_relaxed(vcmdq->cmdq.q.q_base, REG_VCMDQ_PAGE1(vcmdq, BASE));
ret = vcmdq_write_config(vcmdq, VCMDQ_EN);
if (ret) {
dev_err(vcmdq->cmdqv->dev,
"%sGERRORN=0x%X, GERROR=0x%X, CONS=0x%X\n", h,
readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, GERRORN)),
readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, GERROR)),
readl_relaxed(REG_VCMDQ_PAGE0(vcmdq, CONS)));
return ret;
}
dev_dbg(vcmdq->cmdqv->dev, "%sinited\n", h);
return 0;
}
static void tegra241_vintf_hw_deinit(struct tegra241_vintf *vintf)
{
u16 lidx;
for (lidx = 0; lidx < vintf->cmdqv->num_lvcmdqs_per_vintf; lidx++)
if (vintf->lvcmdqs && vintf->lvcmdqs[lidx])
tegra241_vcmdq_hw_deinit(vintf->lvcmdqs[lidx]);
vintf_write_config(vintf, 0);
}
static int tegra241_vintf_hw_init(struct tegra241_vintf *vintf, bool hyp_own)
{
u32 regval;
u16 lidx;
int ret;
/* Reset VINTF */
tegra241_vintf_hw_deinit(vintf);
/* Configure and enable VINTF */
/*
* Note that HYP_OWN bit is wired to zero when running in guest kernel,
* whether enabling it here or not, as !HYP_OWN cmdq HWs only support a
* restricted set of supported commands.
*/
regval = FIELD_PREP(VINTF_HYP_OWN, hyp_own);
writel(regval, REG_VINTF(vintf, CONFIG));
ret = vintf_write_config(vintf, regval | VINTF_EN);
if (ret)
return ret;
/*
* As being mentioned above, HYP_OWN bit is wired to zero for a guest
* kernel, so read it back from HW to ensure that reflects in hyp_own
*/
vintf->hyp_own = !!(VINTF_HYP_OWN & readl(REG_VINTF(vintf, CONFIG)));
for (lidx = 0; lidx < vintf->cmdqv->num_lvcmdqs_per_vintf; lidx++) {
if (vintf->lvcmdqs && vintf->lvcmdqs[lidx]) {
ret = tegra241_vcmdq_hw_init(vintf->lvcmdqs[lidx]);
if (ret) {
tegra241_vintf_hw_deinit(vintf);
return ret;
}
}
}
return 0;
}
static int tegra241_cmdqv_hw_reset(struct arm_smmu_device *smmu)
{
struct tegra241_cmdqv *cmdqv =
container_of(smmu, struct tegra241_cmdqv, smmu);
u16 qidx, lidx, idx;
u32 regval;
int ret;
/* Reset CMDQV */
regval = readl_relaxed(REG_CMDQV(cmdqv, CONFIG));
ret = cmdqv_write_config(cmdqv, regval & ~CMDQV_EN);
if (ret)
return ret;
ret = cmdqv_write_config(cmdqv, regval | CMDQV_EN);
if (ret)
return ret;
/* Assign preallocated global VCMDQs to each VINTF as LVCMDQs */
for (idx = 0, qidx = 0; idx < cmdqv->num_vintfs; idx++) {
for (lidx = 0; lidx < cmdqv->num_lvcmdqs_per_vintf; lidx++) {
regval = FIELD_PREP(CMDQV_CMDQ_ALLOC_VINTF, idx);
regval |= FIELD_PREP(CMDQV_CMDQ_ALLOC_LVCMDQ, lidx);
regval |= CMDQV_CMDQ_ALLOCATED;
writel_relaxed(regval,
REG_CMDQV(cmdqv, CMDQ_ALLOC(qidx++)));
}
}
return tegra241_vintf_hw_init(cmdqv->vintfs[0], true);
}
/* VCMDQ Resource Helpers */
static void tegra241_vcmdq_free_smmu_cmdq(struct tegra241_vcmdq *vcmdq)
{
struct arm_smmu_queue *q = &vcmdq->cmdq.q;
size_t nents = 1 << q->llq.max_n_shift;
size_t qsz = nents << CMDQ_ENT_SZ_SHIFT;
if (!q->base)
return;
dmam_free_coherent(vcmdq->cmdqv->smmu.dev, qsz, q->base, q->base_dma);
}
static int tegra241_vcmdq_alloc_smmu_cmdq(struct tegra241_vcmdq *vcmdq)
{
struct arm_smmu_device *smmu = &vcmdq->cmdqv->smmu;
struct arm_smmu_cmdq *cmdq = &vcmdq->cmdq;
struct arm_smmu_queue *q = &cmdq->q;
char name[16];
int ret;
snprintf(name, 16, "vcmdq%u", vcmdq->idx);
q->llq.max_n_shift = VCMDQ_LOG2SIZE_MAX;
/* Use the common helper to init the VCMDQ, and then... */
ret = arm_smmu_init_one_queue(smmu, q, vcmdq->page0,
TEGRA241_VCMDQ_PROD, TEGRA241_VCMDQ_CONS,
CMDQ_ENT_DWORDS, name);
if (ret)
return ret;
/* ...override q_base to write VCMDQ_BASE registers */
q->q_base = q->base_dma & VCMDQ_ADDR;
q->q_base |= FIELD_PREP(VCMDQ_LOG2SIZE, q->llq.max_n_shift);
if (!vcmdq->vintf->hyp_own)
cmdq->supports_cmd = tegra241_guest_vcmdq_supports_cmd;
return arm_smmu_cmdq_init(smmu, cmdq);
}
/* VINTF Logical VCMDQ Resource Helpers */
static void tegra241_vintf_deinit_lvcmdq(struct tegra241_vintf *vintf, u16 lidx)
{
vintf->lvcmdqs[lidx] = NULL;
}
static int tegra241_vintf_init_lvcmdq(struct tegra241_vintf *vintf, u16 lidx,
struct tegra241_vcmdq *vcmdq)
{
struct tegra241_cmdqv *cmdqv = vintf->cmdqv;
u16 idx = vintf->idx;
vcmdq->idx = idx * cmdqv->num_lvcmdqs_per_vintf + lidx;
vcmdq->lidx = lidx;
vcmdq->cmdqv = cmdqv;
vcmdq->vintf = vintf;
vcmdq->page0 = cmdqv->base + TEGRA241_VINTFi_LVCMDQ_PAGE0(idx, lidx);
vcmdq->page1 = cmdqv->base + TEGRA241_VINTFi_LVCMDQ_PAGE1(idx, lidx);
vintf->lvcmdqs[lidx] = vcmdq;
return 0;
}
static void tegra241_vintf_free_lvcmdq(struct tegra241_vintf *vintf, u16 lidx)
{
struct tegra241_vcmdq *vcmdq = vintf->lvcmdqs[lidx];
char header[64];
tegra241_vcmdq_free_smmu_cmdq(vcmdq);
tegra241_vintf_deinit_lvcmdq(vintf, lidx);
dev_dbg(vintf->cmdqv->dev,
"%sdeallocated\n", lvcmdq_error_header(vcmdq, header, 64));
kfree(vcmdq);
}
static struct tegra241_vcmdq *
tegra241_vintf_alloc_lvcmdq(struct tegra241_vintf *vintf, u16 lidx)
{
struct tegra241_cmdqv *cmdqv = vintf->cmdqv;
struct tegra241_vcmdq *vcmdq;
char header[64];
int ret;
vcmdq = kzalloc(sizeof(*vcmdq), GFP_KERNEL);
if (!vcmdq)
return ERR_PTR(-ENOMEM);
ret = tegra241_vintf_init_lvcmdq(vintf, lidx, vcmdq);
if (ret)
goto free_vcmdq;
/* Build an arm_smmu_cmdq for each LVCMDQ */
ret = tegra241_vcmdq_alloc_smmu_cmdq(vcmdq);
if (ret)
goto deinit_lvcmdq;
dev_dbg(cmdqv->dev,
"%sallocated\n", lvcmdq_error_header(vcmdq, header, 64));
return vcmdq;
deinit_lvcmdq:
tegra241_vintf_deinit_lvcmdq(vintf, lidx);
free_vcmdq:
kfree(vcmdq);
return ERR_PTR(ret);
}
/* VINTF Resource Helpers */
static void tegra241_cmdqv_deinit_vintf(struct tegra241_cmdqv *cmdqv, u16 idx)
{
kfree(cmdqv->vintfs[idx]->lvcmdqs);
ida_free(&cmdqv->vintf_ids, idx);
cmdqv->vintfs[idx] = NULL;
}
static int tegra241_cmdqv_init_vintf(struct tegra241_cmdqv *cmdqv, u16 max_idx,
struct tegra241_vintf *vintf)
{
u16 idx;
int ret;
ret = ida_alloc_max(&cmdqv->vintf_ids, max_idx, GFP_KERNEL);
if (ret < 0)
return ret;
idx = ret;
vintf->idx = idx;
vintf->cmdqv = cmdqv;
vintf->base = cmdqv->base + TEGRA241_VINTF(idx);
vintf->lvcmdqs = kcalloc(cmdqv->num_lvcmdqs_per_vintf,
sizeof(*vintf->lvcmdqs), GFP_KERNEL);
if (!vintf->lvcmdqs) {
ida_free(&cmdqv->vintf_ids, idx);
return -ENOMEM;
}
cmdqv->vintfs[idx] = vintf;
return ret;
}
/* Remove Helpers */
static void tegra241_vintf_remove_lvcmdq(struct tegra241_vintf *vintf, u16 lidx)
{
tegra241_vcmdq_hw_deinit(vintf->lvcmdqs[lidx]);
tegra241_vintf_free_lvcmdq(vintf, lidx);
}
static void tegra241_cmdqv_remove_vintf(struct tegra241_cmdqv *cmdqv, u16 idx)
{
struct tegra241_vintf *vintf = cmdqv->vintfs[idx];
u16 lidx;
/* Remove LVCMDQ resources */
for (lidx = 0; lidx < vintf->cmdqv->num_lvcmdqs_per_vintf; lidx++)
if (vintf->lvcmdqs[lidx])
tegra241_vintf_remove_lvcmdq(vintf, lidx);
/* Remove VINTF resources */
tegra241_vintf_hw_deinit(vintf);
dev_dbg(cmdqv->dev, "VINTF%u: deallocated\n", vintf->idx);
tegra241_cmdqv_deinit_vintf(cmdqv, idx);
kfree(vintf);
}
static void tegra241_cmdqv_remove(struct arm_smmu_device *smmu)
{
struct tegra241_cmdqv *cmdqv =
container_of(smmu, struct tegra241_cmdqv, smmu);
u16 idx;
/* Remove VINTF resources */
for (idx = 0; idx < cmdqv->num_vintfs; idx++) {
if (cmdqv->vintfs[idx]) {
/* Only vintf0 should remain at this stage */
WARN_ON(idx > 0);
tegra241_cmdqv_remove_vintf(cmdqv, idx);
}
}
/* Remove cmdqv resources */
ida_destroy(&cmdqv->vintf_ids);
if (cmdqv->irq > 0)
free_irq(cmdqv->irq, cmdqv);
iounmap(cmdqv->base);
kfree(cmdqv->vintfs);
put_device(cmdqv->dev); /* smmu->impl_dev */
}
static struct arm_smmu_impl_ops tegra241_cmdqv_impl_ops = {
.get_secondary_cmdq = tegra241_cmdqv_get_cmdq,
.device_reset = tegra241_cmdqv_hw_reset,
.device_remove = tegra241_cmdqv_remove,
};
/* Probe Functions */
static int tegra241_cmdqv_acpi_is_memory(struct acpi_resource *res, void *data)
{
struct resource_win win;
return !acpi_dev_resource_address_space(res, &win);
}
static int tegra241_cmdqv_acpi_get_irqs(struct acpi_resource *ares, void *data)
{
struct resource r;
int *irq = data;
if (*irq <= 0 && acpi_dev_resource_interrupt(ares, 0, &r))
*irq = r.start;
return 1; /* No need to add resource to the list */
}
static struct resource *
tegra241_cmdqv_find_acpi_resource(struct device *dev, int *irq)
{
struct acpi_device *adev = to_acpi_device(dev);
struct list_head resource_list;
struct resource_entry *rentry;
struct resource *res = NULL;
int ret;
INIT_LIST_HEAD(&resource_list);
ret = acpi_dev_get_resources(adev, &resource_list,
tegra241_cmdqv_acpi_is_memory, NULL);
if (ret < 0) {
dev_err(dev, "failed to get memory resource: %d\n", ret);
return NULL;
}
rentry = list_first_entry_or_null(&resource_list,
struct resource_entry, node);
if (!rentry) {
dev_err(dev, "failed to get memory resource entry\n");
goto free_list;
}
/* Caller must free the res */
res = kzalloc(sizeof(*res), GFP_KERNEL);
if (!res)
goto free_list;
*res = *rentry->res;
acpi_dev_free_resource_list(&resource_list);
INIT_LIST_HEAD(&resource_list);
if (irq)
ret = acpi_dev_get_resources(adev, &resource_list,
tegra241_cmdqv_acpi_get_irqs, irq);
if (ret < 0 || !irq || *irq <= 0)
dev_warn(dev, "no interrupt. errors will not be reported\n");
free_list:
acpi_dev_free_resource_list(&resource_list);
return res;
}
static int tegra241_cmdqv_init_structures(struct arm_smmu_device *smmu)
{
struct tegra241_cmdqv *cmdqv =
container_of(smmu, struct tegra241_cmdqv, smmu);
struct tegra241_vintf *vintf;
int lidx;
int ret;
vintf = kzalloc(sizeof(*vintf), GFP_KERNEL);
if (!vintf)
goto out_fallback;
/* Init VINTF0 for in-kernel use */
ret = tegra241_cmdqv_init_vintf(cmdqv, 0, vintf);
if (ret) {
dev_err(cmdqv->dev, "failed to init vintf0: %d\n", ret);
goto free_vintf;
}
/* Preallocate logical VCMDQs to VINTF0 */
for (lidx = 0; lidx < cmdqv->num_lvcmdqs_per_vintf; lidx++) {
struct tegra241_vcmdq *vcmdq;
vcmdq = tegra241_vintf_alloc_lvcmdq(vintf, lidx);
if (IS_ERR(vcmdq))
goto free_lvcmdq;
}
/* Now, we are ready to run all the impl ops */
smmu->impl_ops = &tegra241_cmdqv_impl_ops;
return 0;
free_lvcmdq:
for (lidx--; lidx >= 0; lidx--)
tegra241_vintf_free_lvcmdq(vintf, lidx);
tegra241_cmdqv_deinit_vintf(cmdqv, vintf->idx);
free_vintf:
kfree(vintf);
out_fallback:
dev_info(smmu->impl_dev, "Falling back to standard SMMU CMDQ\n");
smmu->options &= ~ARM_SMMU_OPT_TEGRA241_CMDQV;
tegra241_cmdqv_remove(smmu);
return 0;
}
struct dentry *cmdqv_debugfs_dir;
static struct arm_smmu_device *
__tegra241_cmdqv_probe(struct arm_smmu_device *smmu, struct resource *res,
int irq)
{
static const struct arm_smmu_impl_ops init_ops = {
.init_structures = tegra241_cmdqv_init_structures,
.device_remove = tegra241_cmdqv_remove,
};
struct tegra241_cmdqv *cmdqv = NULL;
struct arm_smmu_device *new_smmu;
void __iomem *base;
u32 regval;
int ret;
static_assert(offsetof(struct tegra241_cmdqv, smmu) == 0);
base = ioremap(res->start, resource_size(res));
if (!base) {
dev_err(smmu->dev, "failed to ioremap\n");
return NULL;
}
regval = readl(base + TEGRA241_CMDQV_CONFIG);
if (disable_cmdqv) {
dev_info(smmu->dev, "Detected disable_cmdqv=true\n");
writel(regval & ~CMDQV_EN, base + TEGRA241_CMDQV_CONFIG);
goto iounmap;
}
cmdqv = devm_krealloc(smmu->dev, smmu, sizeof(*cmdqv), GFP_KERNEL);
if (!cmdqv)
goto iounmap;
new_smmu = &cmdqv->smmu;
cmdqv->irq = irq;
cmdqv->base = base;
cmdqv->dev = smmu->impl_dev;
if (cmdqv->irq > 0) {
ret = request_irq(irq, tegra241_cmdqv_isr, 0, "tegra241-cmdqv",
cmdqv);
if (ret) {
dev_err(cmdqv->dev, "failed to request irq (%d): %d\n",
cmdqv->irq, ret);
goto iounmap;
}
}
regval = readl_relaxed(REG_CMDQV(cmdqv, PARAM));
cmdqv->num_vintfs = 1 << FIELD_GET(CMDQV_NUM_VINTF_LOG2, regval);
cmdqv->num_vcmdqs = 1 << FIELD_GET(CMDQV_NUM_VCMDQ_LOG2, regval);
cmdqv->num_lvcmdqs_per_vintf = cmdqv->num_vcmdqs / cmdqv->num_vintfs;
cmdqv->vintfs =
kcalloc(cmdqv->num_vintfs, sizeof(*cmdqv->vintfs), GFP_KERNEL);
if (!cmdqv->vintfs)
goto free_irq;
ida_init(&cmdqv->vintf_ids);
#ifdef CONFIG_IOMMU_DEBUGFS
if (!cmdqv_debugfs_dir) {
cmdqv_debugfs_dir =
debugfs_create_dir("tegra241_cmdqv", iommu_debugfs_dir);
debugfs_create_bool("bypass_vcmdq", 0644, cmdqv_debugfs_dir,
&bypass_vcmdq);
}
#endif
/* Provide init-level ops only, until tegra241_cmdqv_init_structures */
new_smmu->impl_ops = &init_ops;
return new_smmu;
free_irq:
if (cmdqv->irq > 0)
free_irq(cmdqv->irq, cmdqv);
iounmap:
iounmap(base);
return NULL;
}
struct arm_smmu_device *tegra241_cmdqv_probe(struct arm_smmu_device *smmu)
{
struct arm_smmu_device *new_smmu;
struct resource *res = NULL;
int irq;
if (!smmu->dev->of_node)
res = tegra241_cmdqv_find_acpi_resource(smmu->impl_dev, &irq);
if (!res)
goto out_fallback;
new_smmu = __tegra241_cmdqv_probe(smmu, res, irq);
kfree(res);
if (new_smmu)
return new_smmu;
out_fallback:
dev_info(smmu->impl_dev, "Falling back to standard SMMU CMDQ\n");
smmu->options &= ~ARM_SMMU_OPT_TEGRA241_CMDQV;
put_device(smmu->impl_dev);
return ERR_PTR(-ENODEV);
}

28
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
View File

@ -282,6 +282,20 @@ static int qcom_smmu_cfg_probe(struct arm_smmu_device *smmu)
u32 smr;
int i;
/*
* MSM8998 LPASS SMMU reports 13 context banks, but accessing
* the last context bank crashes the system.
*/
if (of_device_is_compatible(smmu->dev->of_node, "qcom,msm8998-smmu-v2") &&
smmu->num_context_banks == 13) {
smmu->num_context_banks = 12;
} else if (of_device_is_compatible(smmu->dev->of_node, "qcom,sdm630-smmu-v2")) {
if (smmu->num_context_banks == 21) /* SDM630 / SDM660 A2NOC SMMU */
smmu->num_context_banks = 7;
else if (smmu->num_context_banks == 14) /* SDM630 / SDM660 LPASS SMMU */
smmu->num_context_banks = 13;
}
/*
* Some platforms support more than the Arm SMMU architected maximum of
* 128 stream matching groups. For unknown reasons, the additional
@ -338,6 +352,19 @@ static int qcom_smmu_cfg_probe(struct arm_smmu_device *smmu)
return 0;
}
static int qcom_adreno_smmuv2_cfg_probe(struct arm_smmu_device *smmu)
{
/* Support for 16K pages is advertised on some SoCs, but it doesn't seem to work */
smmu->features &= ~ARM_SMMU_FEAT_FMT_AARCH64_16K;
/* TZ protects several last context banks, hide them from Linux */
if (of_device_is_compatible(smmu->dev->of_node, "qcom,sdm630-smmu-v2") &&
smmu->num_context_banks == 5)
smmu->num_context_banks = 2;
return 0;
}
static void qcom_smmu_write_s2cr(struct arm_smmu_device *smmu, int idx)
{
struct arm_smmu_s2cr *s2cr = smmu->s2crs + idx;
@ -436,6 +463,7 @@ static const struct arm_smmu_impl sdm845_smmu_500_impl = {
static const struct arm_smmu_impl qcom_adreno_smmu_v2_impl = {
.init_context = qcom_adreno_smmu_init_context,
.cfg_probe = qcom_adreno_smmuv2_cfg_probe,
.def_domain_type = qcom_smmu_def_domain_type,
.alloc_context_bank = qcom_adreno_smmu_alloc_context_bank,
.write_sctlr = qcom_adreno_smmu_write_sctlr,

2
drivers/iommu/arm/arm-smmu/arm-smmu.c
View File

@ -417,7 +417,7 @@ void arm_smmu_read_context_fault_info(struct arm_smmu_device *smmu, int idx,
void arm_smmu_print_context_fault_info(struct arm_smmu_device *smmu, int idx,
const struct arm_smmu_context_fault_info *cfi)
{
dev_dbg(smmu->dev,
dev_err(smmu->dev,
"Unhandled context fault: fsr=0x%x, iova=0x%08lx, fsynr=0x%x, cbfrsynra=0x%x, cb=%d\n",
cfi->fsr, cfi->iova, cfi->fsynr, cfi->cbfrsynra, idx);

4
drivers/iommu/fsl_pamu_domain.c
View File

@ -416,14 +416,12 @@ static struct iommu_group *fsl_pamu_device_group(struct device *dev)
static struct iommu_device *fsl_pamu_probe_device(struct device *dev)
{
int len;
/*
* uboot must fill the fsl,liodn for platform devices to be supported by
* the iommu.
*/
if (!dev_is_pci(dev) &&
!of_get_property(dev->of_node, "fsl,liodn", &len))
!of_property_present(dev->of_node, "fsl,liodn"))
return ERR_PTR(-ENODEV);
return &pamu_iommu;

239
drivers/iommu/intel/cache.c
View File

@ -190,6 +190,13 @@ int cache_tag_assign_domain(struct dmar_domain *domain,
u16 did = domain_get_id_for_dev(domain, dev);
int ret;
/* domain->qi_bach will be freed in iommu_free_domain() path. */
if (!domain->qi_batch) {
domain->qi_batch = kzalloc(sizeof(*domain->qi_batch), GFP_KERNEL);
if (!domain->qi_batch)
return -ENOMEM;
}
ret = __cache_tag_assign_domain(domain, did, dev, pasid);
if (ret || domain->domain.type != IOMMU_DOMAIN_NESTED)
return ret;
@ -255,6 +262,154 @@ static unsigned long calculate_psi_aligned_address(unsigned long start,
return ALIGN_DOWN(start, VTD_PAGE_SIZE << mask);
}
static void qi_batch_flush_descs(struct intel_iommu *iommu, struct qi_batch *batch)
{
if (!iommu || !batch->index)
return;
qi_submit_sync(iommu, batch->descs, batch->index, 0);
/* Reset the index value and clean the whole batch buffer. */
memset(batch, 0, sizeof(*batch));
}
static void qi_batch_increment_index(struct intel_iommu *iommu, struct qi_batch *batch)
{
if (++batch->index == QI_MAX_BATCHED_DESC_COUNT)
qi_batch_flush_descs(iommu, batch);
}
static void qi_batch_add_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type,
struct qi_batch *batch)
{
qi_desc_iotlb(iommu, did, addr, size_order, type, &batch->descs[batch->index]);
qi_batch_increment_index(iommu, batch);
}
static void qi_batch_add_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
u16 qdep, u64 addr, unsigned int mask,
struct qi_batch *batch)
{
/*
* According to VT-d spec, software is recommended to not submit any Device-TLB
* invalidation requests while address remapping hardware is disabled.
*/
if (!(iommu->gcmd & DMA_GCMD_TE))
return;
qi_desc_dev_iotlb(sid, pfsid, qdep, addr, mask, &batch->descs[batch->index]);
qi_batch_increment_index(iommu, batch);
}
static void qi_batch_add_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid,
u64 addr, unsigned long npages, bool ih,
struct qi_batch *batch)
{
/*
* npages == -1 means a PASID-selective invalidation, otherwise,
* a positive value for Page-selective-within-PASID invalidation.
* 0 is not a valid input.
*/
if (!npages)
return;
qi_desc_piotlb(did, pasid, addr, npages, ih, &batch->descs[batch->index]);
qi_batch_increment_index(iommu, batch);
}
static void qi_batch_add_pasid_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
u32 pasid, u16 qdep, u64 addr,
unsigned int size_order, struct qi_batch *batch)
{
/*
* According to VT-d spec, software is recommended to not submit any
* Device-TLB invalidation requests while address remapping hardware
* is disabled.
*/
if (!(iommu->gcmd & DMA_GCMD_TE))
return;
qi_desc_dev_iotlb_pasid(sid, pfsid, pasid, qdep, addr, size_order,
&batch->descs[batch->index]);
qi_batch_increment_index(iommu, batch);
}
static void cache_tag_flush_iotlb(struct dmar_domain *domain, struct cache_tag *tag,
unsigned long addr, unsigned long pages,
unsigned long mask, int ih)
{
struct intel_iommu *iommu = tag->iommu;
u64 type = DMA_TLB_PSI_FLUSH;
if (domain->use_first_level) {
qi_batch_add_piotlb(iommu, tag->domain_id, tag->pasid, addr,
pages, ih, domain->qi_batch);
return;
}
/*
* Fallback to domain selective flush if no PSI support or the size
* is too big.
*/
if (!cap_pgsel_inv(iommu->cap) ||
mask > cap_max_amask_val(iommu->cap) || pages == -1) {
addr = 0;
mask = 0;
ih = 0;
type = DMA_TLB_DSI_FLUSH;
}
if (ecap_qis(iommu->ecap))
qi_batch_add_iotlb(iommu, tag->domain_id, addr | ih, mask, type,
domain->qi_batch);
else
__iommu_flush_iotlb(iommu, tag->domain_id, addr | ih, mask, type);
}
static void cache_tag_flush_devtlb_psi(struct dmar_domain *domain, struct cache_tag *tag,
unsigned long addr, unsigned long mask)
{
struct intel_iommu *iommu = tag->iommu;
struct device_domain_info *info;
u16 sid;
info = dev_iommu_priv_get(tag->dev);
sid = PCI_DEVID(info->bus, info->devfn);
if (tag->pasid == IOMMU_NO_PASID) {
qi_batch_add_dev_iotlb(iommu, sid, info->pfsid, info->ats_qdep,
addr, mask, domain->qi_batch);
if (info->dtlb_extra_inval)
qi_batch_add_dev_iotlb(iommu, sid, info->pfsid, info->ats_qdep,
addr, mask, domain->qi_batch);
return;
}
qi_batch_add_pasid_dev_iotlb(iommu, sid, info->pfsid, tag->pasid,
info->ats_qdep, addr, mask, domain->qi_batch);
if (info->dtlb_extra_inval)
qi_batch_add_pasid_dev_iotlb(iommu, sid, info->pfsid, tag->pasid,
info->ats_qdep, addr, mask,
domain->qi_batch);
}
static void cache_tag_flush_devtlb_all(struct dmar_domain *domain, struct cache_tag *tag)
{
struct intel_iommu *iommu = tag->iommu;
struct device_domain_info *info;
u16 sid;
info = dev_iommu_priv_get(tag->dev);
sid = PCI_DEVID(info->bus, info->devfn);
qi_batch_add_dev_iotlb(iommu, sid, info->pfsid, info->ats_qdep, 0,
MAX_AGAW_PFN_WIDTH, domain->qi_batch);
if (info->dtlb_extra_inval)
qi_batch_add_dev_iotlb(iommu, sid, info->pfsid, info->ats_qdep, 0,
MAX_AGAW_PFN_WIDTH, domain->qi_batch);
}
/*
* Invalidates a range of IOVA from @start (inclusive) to @end (inclusive)
* when the memory mappings in the target domain have been modified.
@ -262,6 +417,7 @@ static unsigned long calculate_psi_aligned_address(unsigned long start,
void cache_tag_flush_range(struct dmar_domain *domain, unsigned long start,
unsigned long end, int ih)
{
struct intel_iommu *iommu = NULL;
unsigned long pages, mask, addr;
struct cache_tag *tag;
unsigned long flags;
@ -270,30 +426,14 @@ void cache_tag_flush_range(struct dmar_domain *domain, unsigned long start,
spin_lock_irqsave(&domain->cache_lock, flags);
list_for_each_entry(tag, &domain->cache_tags, node) {
struct intel_iommu *iommu = tag->iommu;
struct device_domain_info *info;
u16 sid;
if (iommu && iommu != tag->iommu)
qi_batch_flush_descs(iommu, domain->qi_batch);
iommu = tag->iommu;
switch (tag->type) {
case CACHE_TAG_IOTLB:
case CACHE_TAG_NESTING_IOTLB:
if (domain->use_first_level) {
qi_flush_piotlb(iommu, tag->domain_id,
tag->pasid, addr, pages, ih);
} else {
/*
* Fallback to domain selective flush if no
* PSI support or the size is too big.
*/
if (!cap_pgsel_inv(iommu->cap) ||
mask > cap_max_amask_val(iommu->cap))
iommu->flush.flush_iotlb(iommu, tag->domain_id,
0, 0, DMA_TLB_DSI_FLUSH);
else
iommu->flush.flush_iotlb(iommu, tag->domain_id,
addr | ih, mask,
DMA_TLB_PSI_FLUSH);
}
cache_tag_flush_iotlb(domain, tag, addr, pages, mask, ih);
break;
case CACHE_TAG_NESTING_DEVTLB:
/*
@ -307,23 +447,13 @@ void cache_tag_flush_range(struct dmar_domain *domain, unsigned long start,
mask = MAX_AGAW_PFN_WIDTH;
fallthrough;
case CACHE_TAG_DEVTLB:
info = dev_iommu_priv_get(tag->dev);
sid = PCI_DEVID(info->bus, info->devfn);
if (tag->pasid == IOMMU_NO_PASID)
qi_flush_dev_iotlb(iommu, sid, info->pfsid,
info->ats_qdep, addr, mask);
else
qi_flush_dev_iotlb_pasid(iommu, sid, info->pfsid,
tag->pasid, info->ats_qdep,
addr, mask);
quirk_extra_dev_tlb_flush(info, addr, mask, tag->pasid, info->ats_qdep);
cache_tag_flush_devtlb_psi(domain, tag, addr, mask);
break;
}
trace_cache_tag_flush_range(tag, start, end, addr, pages, mask);
}
qi_batch_flush_descs(iommu, domain->qi_batch);
spin_unlock_irqrestore(&domain->cache_lock, flags);
}
@ -333,39 +463,30 @@ void cache_tag_flush_range(struct dmar_domain *domain, unsigned long start,
*/
void cache_tag_flush_all(struct dmar_domain *domain)
{
struct intel_iommu *iommu = NULL;
struct cache_tag *tag;
unsigned long flags;
spin_lock_irqsave(&domain->cache_lock, flags);
list_for_each_entry(tag, &domain->cache_tags, node) {
struct intel_iommu *iommu = tag->iommu;
struct device_domain_info *info;
u16 sid;
if (iommu && iommu != tag->iommu)
qi_batch_flush_descs(iommu, domain->qi_batch);
iommu = tag->iommu;
switch (tag->type) {
case CACHE_TAG_IOTLB:
case CACHE_TAG_NESTING_IOTLB:
if (domain->use_first_level)
qi_flush_piotlb(iommu, tag->domain_id,
tag->pasid, 0, -1, 0);
else
iommu->flush.flush_iotlb(iommu, tag->domain_id,
0, 0, DMA_TLB_DSI_FLUSH);
cache_tag_flush_iotlb(domain, tag, 0, -1, 0, 0);
break;
case CACHE_TAG_DEVTLB:
case CACHE_TAG_NESTING_DEVTLB:
info = dev_iommu_priv_get(tag->dev);
sid = PCI_DEVID(info->bus, info->devfn);
qi_flush_dev_iotlb(iommu, sid, info->pfsid, info->ats_qdep,
0, MAX_AGAW_PFN_WIDTH);
quirk_extra_dev_tlb_flush(info, 0, MAX_AGAW_PFN_WIDTH,
IOMMU_NO_PASID, info->ats_qdep);
cache_tag_flush_devtlb_all(domain, tag);
break;
}
trace_cache_tag_flush_all(tag);
}
qi_batch_flush_descs(iommu, domain->qi_batch);
spin_unlock_irqrestore(&domain->cache_lock, flags);
}
@ -383,6 +504,7 @@ void cache_tag_flush_all(struct dmar_domain *domain)
void cache_tag_flush_range_np(struct dmar_domain *domain, unsigned long start,
unsigned long end)
{
struct intel_iommu *iommu = NULL;
unsigned long pages, mask, addr;
struct cache_tag *tag;
unsigned long flags;
@ -391,7 +513,9 @@ void cache_tag_flush_range_np(struct dmar_domain *domain, unsigned long start,
spin_lock_irqsave(&domain->cache_lock, flags);
list_for_each_entry(tag, &domain->cache_tags, node) {
struct intel_iommu *iommu = tag->iommu;
if (iommu && iommu != tag->iommu)
qi_batch_flush_descs(iommu, domain->qi_batch);
iommu = tag->iommu;
if (!cap_caching_mode(iommu->cap) || domain->use_first_level) {
iommu_flush_write_buffer(iommu);
@ -399,22 +523,11 @@ void cache_tag_flush_range_np(struct dmar_domain *domain, unsigned long start,
}
if (tag->type == CACHE_TAG_IOTLB ||
tag->type == CACHE_TAG_NESTING_IOTLB) {
/*
* Fallback to domain selective flush if no
* PSI support or the size is too big.
*/
if (!cap_pgsel_inv(iommu->cap) ||
mask > cap_max_amask_val(iommu->cap))
iommu->flush.flush_iotlb(iommu, tag->domain_id,
0, 0, DMA_TLB_DSI_FLUSH);
else
iommu->flush.flush_iotlb(iommu, tag->domain_id,
addr, mask,
DMA_TLB_PSI_FLUSH);
}
tag->type == CACHE_TAG_NESTING_IOTLB)
cache_tag_flush_iotlb(domain, tag, addr, pages, mask, 0);
trace_cache_tag_flush_range_np(tag, start, end, addr, pages, mask);
}
qi_batch_flush_descs(iommu, domain->qi_batch);
spin_unlock_irqrestore(&domain->cache_lock, flags);
}

109
drivers/iommu/intel/dmar.c
View File

@ -1204,9 +1204,7 @@ static void free_iommu(struct intel_iommu *iommu)
*/
static inline void reclaim_free_desc(struct q_inval *qi)
{
while (qi->desc_status[qi->free_tail] == QI_DONE ||
qi->desc_status[qi->free_tail] == QI_ABORT) {
qi->desc_status[qi->free_tail] = QI_FREE;
while (qi->desc_status[qi->free_tail] == QI_FREE && qi->free_tail != qi->free_head) {
qi->free_tail = (qi->free_tail + 1) % QI_LENGTH;
qi->free_cnt++;
}
@ -1463,8 +1461,16 @@ restart:
raw_spin_lock(&qi->q_lock);
}
for (i = 0; i < count; i++)
qi->desc_status[(index + i) % QI_LENGTH] = QI_DONE;
/*
* The reclaim code can free descriptors from multiple submissions
* starting from the tail of the queue. When count == 0, the
* status of the standalone wait descriptor at the tail of the queue
* must be set to QI_FREE to allow the reclaim code to proceed.
* It is also possible that descriptors from one of the previous
* submissions has to be reclaimed by a subsequent submission.
*/
for (i = 0; i <= count; i++)
qi->desc_status[(index + i) % QI_LENGTH] = QI_FREE;
reclaim_free_desc(qi);
raw_spin_unlock_irqrestore(&qi->q_lock, flags);
@ -1520,24 +1526,9 @@ void qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid, u8 fm,
void qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type)
{
u8 dw = 0, dr = 0;
struct qi_desc desc;
int ih = 0;
if (cap_write_drain(iommu->cap))
dw = 1;
if (cap_read_drain(iommu->cap))
dr = 1;
desc.qw0 = QI_IOTLB_DID(did) | QI_IOTLB_DR(dr) | QI_IOTLB_DW(dw)
| QI_IOTLB_GRAN(type) | QI_IOTLB_TYPE;
desc.qw1 = QI_IOTLB_ADDR(addr) | QI_IOTLB_IH(ih)
| QI_IOTLB_AM(size_order);
desc.qw2 = 0;
desc.qw3 = 0;
qi_desc_iotlb(iommu, did, addr, size_order, type, &desc);
qi_submit_sync(iommu, &desc, 1, 0);
}
@ -1555,20 +1546,7 @@ void qi_flush_dev_iotlb(struct intel_iommu *iommu, u16 sid, u16 pfsid,
if (!(iommu->gcmd & DMA_GCMD_TE))
return;
if (mask) {
addr |= (1ULL << (VTD_PAGE_SHIFT + mask - 1)) - 1;
desc.qw1 = QI_DEV_IOTLB_ADDR(addr) | QI_DEV_IOTLB_SIZE;
} else
desc.qw1 = QI_DEV_IOTLB_ADDR(addr);
if (qdep >= QI_DEV_IOTLB_MAX_INVS)
qdep = 0;
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_desc_dev_iotlb(sid, pfsid, qdep, addr, mask, &desc);
qi_submit_sync(iommu, &desc, 1, 0);
}
@ -1588,28 +1566,7 @@ void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
return;
}
if (npages == -1) {
desc.qw0 = QI_EIOTLB_PASID(pasid) |
QI_EIOTLB_DID(did) |
QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) |
QI_EIOTLB_TYPE;
desc.qw1 = 0;
} else {
int mask = ilog2(__roundup_pow_of_two(npages));
unsigned long align = (1ULL << (VTD_PAGE_SHIFT + mask));
if (WARN_ON_ONCE(!IS_ALIGNED(addr, align)))
addr = ALIGN_DOWN(addr, align);
desc.qw0 = QI_EIOTLB_PASID(pasid) |
QI_EIOTLB_DID(did) |
QI_EIOTLB_GRAN(QI_GRAN_PSI_PASID) |
QI_EIOTLB_TYPE;
desc.qw1 = QI_EIOTLB_ADDR(addr) |
QI_EIOTLB_IH(ih) |
QI_EIOTLB_AM(mask);
}
qi_desc_piotlb(did, pasid, addr, npages, ih, &desc);
qi_submit_sync(iommu, &desc, 1, 0);
}
@ -1617,7 +1574,6 @@ void qi_flush_piotlb(struct intel_iommu *iommu, u16 did, u32 pasid, u64 addr,
void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu, u16 sid, u16 pfsid,
u32 pasid, u16 qdep, u64 addr, unsigned int size_order)
{
unsigned long mask = 1UL << (VTD_PAGE_SHIFT + size_order - 1);
struct qi_desc desc = {.qw1 = 0, .qw2 = 0, .qw3 = 0};
/*
@ -1629,40 +1585,9 @@ void qi_flush_dev_iotlb_pasid(struct intel_iommu *iommu, u16 sid, u16 pfsid,
if (!(iommu->gcmd & DMA_GCMD_TE))
return;
desc.qw0 = QI_DEV_EIOTLB_PASID(pasid) | QI_DEV_EIOTLB_SID(sid) |
QI_DEV_EIOTLB_QDEP(qdep) | QI_DEIOTLB_TYPE |
QI_DEV_IOTLB_PFSID(pfsid);
/*
* If S bit is 0, we only flush a single page. If S bit is set,
* The least significant zero bit indicates the invalidation address
* range. VT-d spec 6.5.2.6.
* e.g. address bit 12[0] indicates 8KB, 13[0] indicates 16KB.
* size order = 0 is PAGE_SIZE 4KB
* Max Invs Pending (MIP) is set to 0 for now until we have DIT in
* ECAP.
*/
if (!IS_ALIGNED(addr, VTD_PAGE_SIZE << size_order))
pr_warn_ratelimited("Invalidate non-aligned address %llx, order %d\n",
addr, size_order);
/* Take page address */
desc.qw1 = QI_DEV_EIOTLB_ADDR(addr);
if (size_order) {
/*
* Existing 0s in address below size_order may be the least
* significant bit, we must set them to 1s to avoid having
* smaller size than desired.
*/
desc.qw1 |= GENMASK_ULL(size_order + VTD_PAGE_SHIFT - 1,
VTD_PAGE_SHIFT);
/* Clear size_order bit to indicate size */
desc.qw1 &= ~mask;
/* Set the S bit to indicate flushing more than 1 page */
desc.qw1 |= QI_DEV_EIOTLB_SIZE;
}
qi_desc_dev_iotlb_pasid(sid, pfsid, pasid,
qdep, addr, size_order,
&desc);
qi_submit_sync(iommu, &desc, 1, 0);
}

504
drivers/iommu/intel/iommu.c
View File

@ -167,15 +167,6 @@ static void device_rbtree_remove(struct device_domain_info *info)
spin_unlock_irqrestore(&iommu->device_rbtree_lock, flags);
}
/*
* This domain is a statically identity mapping domain.
* 1. This domain creats a static 1:1 mapping to all usable memory.
* 2. It maps to each iommu if successful.
* 3. Each iommu mapps to this domain if successful.
*/
static struct dmar_domain *si_domain;
static int hw_pass_through = 1;
struct dmar_rmrr_unit {
struct list_head list; /* list of rmrr units */
struct acpi_dmar_header *hdr; /* ACPI header */
@ -293,11 +284,6 @@ static int __init intel_iommu_setup(char *str)
}
__setup("intel_iommu=", intel_iommu_setup);
static int domain_type_is_si(struct dmar_domain *domain)
{
return domain->domain.type == IOMMU_DOMAIN_IDENTITY;
}
static int domain_pfn_supported(struct dmar_domain *domain, unsigned long pfn)
{
int addr_width = agaw_to_width(domain->agaw) - VTD_PAGE_SHIFT;
@ -492,7 +478,6 @@ void domain_update_iommu_cap(struct dmar_domain *domain)
domain->domain.geometry.aperture_end = __DOMAIN_MAX_ADDR(domain->gaw);
domain->domain.pgsize_bitmap |= domain_super_pgsize_bitmap(domain);
domain_update_iotlb(domain);
}
struct context_entry *iommu_context_addr(struct intel_iommu *iommu, u8 bus,
@ -1199,9 +1184,8 @@ static void __iommu_flush_context(struct intel_iommu *iommu,
raw_spin_unlock_irqrestore(&iommu->register_lock, flag);
}
/* return value determine if we need a write buffer flush */
static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did,
u64 addr, unsigned int size_order, u64 type)
void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type)
{
int tlb_offset = ecap_iotlb_offset(iommu->ecap);
u64 val = 0, val_iva = 0;
@ -1270,32 +1254,6 @@ domain_lookup_dev_info(struct dmar_domain *domain,
return NULL;
}
void domain_update_iotlb(struct dmar_domain *domain)
{
struct dev_pasid_info *dev_pasid;
struct device_domain_info *info;
bool has_iotlb_device = false;
unsigned long flags;
spin_lock_irqsave(&domain->lock, flags);
list_for_each_entry(info, &domain->devices, link) {
if (info->ats_enabled) {
has_iotlb_device = true;
break;
}
}
list_for_each_entry(dev_pasid, &domain->dev_pasids, link_domain) {
info = dev_iommu_priv_get(dev_pasid->dev);
if (info->ats_enabled) {
has_iotlb_device = true;
break;
}
}
domain->has_iotlb_device = has_iotlb_device;
spin_unlock_irqrestore(&domain->lock, flags);
}
/*
* The extra devTLB flush quirk impacts those QAT devices with PCI device
* IDs ranging from 0x4940 to 0x4943. It is exempted from risky_device()
@ -1322,20 +1280,9 @@ static void iommu_enable_pci_caps(struct device_domain_info *info)
return;
pdev = to_pci_dev(info->dev);
/* The PCIe spec, in its wisdom, declares that the behaviour of
the device if you enable PASID support after ATS support is
undefined. So always enable PASID support on devices which
have it, even if we can't yet know if we're ever going to
use it. */
if (info->pasid_supported && !pci_enable_pasid(pdev, info->pasid_supported & ~1))
info->pasid_enabled = 1;
if (info->ats_supported && pci_ats_page_aligned(pdev) &&
!pci_enable_ats(pdev, VTD_PAGE_SHIFT)) {
!pci_enable_ats(pdev, VTD_PAGE_SHIFT))
info->ats_enabled = 1;
domain_update_iotlb(info->domain);
}
}
static void iommu_disable_pci_caps(struct device_domain_info *info)
@ -1350,12 +1297,6 @@ static void iommu_disable_pci_caps(struct device_domain_info *info)
if (info->ats_enabled) {
pci_disable_ats(pdev);
info->ats_enabled = 0;
domain_update_iotlb(info->domain);
}
if (info->pasid_enabled) {
pci_disable_pasid(pdev);
info->pasid_enabled = 0;
}
}
@ -1447,10 +1388,10 @@ static int iommu_init_domains(struct intel_iommu *iommu)
* 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.
* this purpose. This domain id is also used for identity domain
* in legacy mode.
*/
if (sm_supported(iommu))
set_bit(FLPT_DEFAULT_DID, iommu->domain_ids);
set_bit(FLPT_DEFAULT_DID, iommu->domain_ids);
return 0;
}
@ -1524,7 +1465,6 @@ static struct dmar_domain *alloc_domain(unsigned int type)
domain->nid = NUMA_NO_NODE;
if (first_level_by_default(type))
domain->use_first_level = true;
domain->has_iotlb_device = false;
INIT_LIST_HEAD(&domain->devices);
INIT_LIST_HEAD(&domain->dev_pasids);
INIT_LIST_HEAD(&domain->cache_tags);
@ -1632,9 +1572,65 @@ static void domain_exit(struct dmar_domain *domain)
if (WARN_ON(!list_empty(&domain->devices)))
return;
kfree(domain->qi_batch);
kfree(domain);
}
/*
* For kdump cases, old valid entries may be cached due to the
* in-flight DMA and copied pgtable, but there is no unmapping
* behaviour for them, thus we need an explicit cache flush for
* the newly-mapped device. For kdump, at this point, the device
* is supposed to finish reset at its driver probe stage, so no
* in-flight DMA will exist, and we don't need to worry anymore
* hereafter.
*/
static void copied_context_tear_down(struct intel_iommu *iommu,
struct context_entry *context,
u8 bus, u8 devfn)
{
u16 did_old;
if (!context_copied(iommu, bus, devfn))
return;
assert_spin_locked(&iommu->lock);
did_old = context_domain_id(context);
context_clear_entry(context);
if (did_old < cap_ndoms(iommu->cap)) {
iommu->flush.flush_context(iommu, did_old,
(((u16)bus) << 8) | devfn,
DMA_CCMD_MASK_NOBIT,
DMA_CCMD_DEVICE_INVL);
iommu->flush.flush_iotlb(iommu, did_old, 0, 0,
DMA_TLB_DSI_FLUSH);
}
clear_context_copied(iommu, bus, devfn);
}
/*
* It's a non-present to present mapping. If hardware doesn't cache
* non-present entry we only need to flush the write-buffer. If the
* _does_ cache non-present entries, then it does so in the special
* domain #0, which we have to flush:
*/
static void context_present_cache_flush(struct intel_iommu *iommu, u16 did,
u8 bus, u8 devfn)
{
if (cap_caching_mode(iommu->cap)) {
iommu->flush.flush_context(iommu, 0,
(((u16)bus) << 8) | devfn,
DMA_CCMD_MASK_NOBIT,
DMA_CCMD_DEVICE_INVL);
iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH);
} else {
iommu_flush_write_buffer(iommu);
}
}
static int domain_context_mapping_one(struct dmar_domain *domain,
struct intel_iommu *iommu,
u8 bus, u8 devfn)
@ -1647,9 +1643,6 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
struct context_entry *context;
int agaw, ret;
if (hw_pass_through && domain_type_is_si(domain))
translation = CONTEXT_TT_PASS_THROUGH;
pr_debug("Set context mapping for %02x:%02x.%d\n",
bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
@ -1663,83 +1656,35 @@ static int domain_context_mapping_one(struct dmar_domain *domain,
if (context_present(context) && !context_copied(iommu, bus, devfn))
goto out_unlock;
/*
* For kdump cases, old valid entries may be cached due to the
* in-flight DMA and copied pgtable, but there is no unmapping
* behaviour for them, thus we need an explicit cache flush for
* the newly-mapped device. For kdump, at this point, the device
* is supposed to finish reset at its driver probe stage, so no
* in-flight DMA will exist, and we don't need to worry anymore
* hereafter.
*/
if (context_copied(iommu, bus, devfn)) {
u16 did_old = context_domain_id(context);
if (did_old < cap_ndoms(iommu->cap)) {
iommu->flush.flush_context(iommu, did_old,
(((u16)bus) << 8) | devfn,
DMA_CCMD_MASK_NOBIT,
DMA_CCMD_DEVICE_INVL);
iommu->flush.flush_iotlb(iommu, did_old, 0, 0,
DMA_TLB_DSI_FLUSH);
}
clear_context_copied(iommu, bus, devfn);
}
copied_context_tear_down(iommu, context, bus, devfn);
context_clear_entry(context);
context_set_domain_id(context, did);
if (translation != CONTEXT_TT_PASS_THROUGH) {
/*
* 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))
goto out_unlock;
}
if (info && info->ats_supported)
translation = CONTEXT_TT_DEV_IOTLB;
else
translation = CONTEXT_TT_MULTI_LEVEL;
context_set_address_root(context, virt_to_phys(pgd));
context_set_address_width(context, agaw);
} else {
/*
* In pass through mode, AW must be programmed to
* indicate the largest AGAW value supported by
* hardware. And ASR is ignored by hardware.
*/
context_set_address_width(context, iommu->msagaw);
/*
* 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))
goto out_unlock;
}
if (info && info->ats_supported)
translation = CONTEXT_TT_DEV_IOTLB;
else
translation = CONTEXT_TT_MULTI_LEVEL;
context_set_address_root(context, virt_to_phys(pgd));
context_set_address_width(context, agaw);
context_set_translation_type(context, translation);
context_set_fault_enable(context);
context_set_present(context);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(context, sizeof(*context));
/*
* It's a non-present to present mapping. If hardware doesn't cache
* non-present entry we only need to flush the write-buffer. If the
* _does_ cache non-present entries, then it does so in the special
* domain #0, which we have to flush:
*/
if (cap_caching_mode(iommu->cap)) {
iommu->flush.flush_context(iommu, 0,
(((u16)bus) << 8) | devfn,
DMA_CCMD_MASK_NOBIT,
DMA_CCMD_DEVICE_INVL);
iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH);
} else {
iommu_flush_write_buffer(iommu);
}
context_present_cache_flush(iommu, did, bus, devfn);
ret = 0;
out_unlock:
@ -2000,80 +1945,6 @@ static bool dev_is_real_dma_subdevice(struct device *dev)
pci_real_dma_dev(to_pci_dev(dev)) != to_pci_dev(dev);
}
static int iommu_domain_identity_map(struct dmar_domain *domain,
unsigned long first_vpfn,
unsigned long last_vpfn)
{
/*
* RMRR range might have overlap with physical memory range,
* clear it first
*/
dma_pte_clear_range(domain, first_vpfn, last_vpfn);
return __domain_mapping(domain, first_vpfn,
first_vpfn, last_vpfn - first_vpfn + 1,
DMA_PTE_READ|DMA_PTE_WRITE, GFP_KERNEL);
}
static int md_domain_init(struct dmar_domain *domain, int guest_width);
static int __init si_domain_init(int hw)
{
struct dmar_rmrr_unit *rmrr;
struct device *dev;
int i, nid, ret;
si_domain = alloc_domain(IOMMU_DOMAIN_IDENTITY);
if (!si_domain)
return -EFAULT;
if (md_domain_init(si_domain, DEFAULT_DOMAIN_ADDRESS_WIDTH)) {
domain_exit(si_domain);
si_domain = NULL;
return -EFAULT;
}
if (hw)
return 0;
for_each_online_node(nid) {
unsigned long start_pfn, end_pfn;
int i;
for_each_mem_pfn_range(i, nid, &start_pfn, &end_pfn, NULL) {
ret = iommu_domain_identity_map(si_domain,
mm_to_dma_pfn_start(start_pfn),
mm_to_dma_pfn_end(end_pfn-1));
if (ret)
return ret;
}
}
/*
* Identity map the RMRRs so that devices with RMRRs could also use
* the si_domain.
*/
for_each_rmrr_units(rmrr) {
for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt,
i, dev) {
unsigned long long start = rmrr->base_address;
unsigned long long end = rmrr->end_address;
if (WARN_ON(end < start ||
end >> agaw_to_width(si_domain->agaw)))
continue;
ret = iommu_domain_identity_map(si_domain,
mm_to_dma_pfn_start(start >> PAGE_SHIFT),
mm_to_dma_pfn_end(end >> PAGE_SHIFT));
if (ret)
return ret;
}
}
return 0;
}
static int dmar_domain_attach_device(struct dmar_domain *domain,
struct device *dev)
{
@ -2096,8 +1967,6 @@ static int dmar_domain_attach_device(struct dmar_domain *domain,
if (!sm_supported(iommu))
ret = domain_context_mapping(domain, dev);
else if (hw_pass_through && domain_type_is_si(domain))
ret = intel_pasid_setup_pass_through(iommu, dev, IOMMU_NO_PASID);
else if (domain->use_first_level)
ret = domain_setup_first_level(iommu, domain, dev, IOMMU_NO_PASID);
else
@ -2106,8 +1975,7 @@ static int dmar_domain_attach_device(struct dmar_domain *domain,
if (ret)
goto out_block_translation;
if (sm_supported(info->iommu) || !domain_type_is_si(info->domain))
iommu_enable_pci_caps(info);
iommu_enable_pci_caps(info);
ret = cache_tag_assign_domain(domain, dev, IOMMU_NO_PASID);
if (ret)
@ -2151,6 +2019,16 @@ static bool device_rmrr_is_relaxable(struct device *dev)
static int device_def_domain_type(struct device *dev)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct intel_iommu *iommu = info->iommu;
/*
* Hardware does not support the passthrough translation mode.
* Always use a dynamaic mapping domain.
*/
if (!ecap_pass_through(iommu->ecap))
return IOMMU_DOMAIN_DMA;
if (dev_is_pci(dev)) {
struct pci_dev *pdev = to_pci_dev(dev);
@ -2441,8 +2319,6 @@ static int __init init_dmars(void)
}
}
if (!ecap_pass_through(iommu->ecap))
hw_pass_through = 0;
intel_svm_check(iommu);
}
@ -2458,10 +2334,6 @@ static int __init init_dmars(void)
check_tylersburg_isoch();
ret = si_domain_init(hw_pass_through);
if (ret)
goto free_iommu;
/*
* for each drhd
* enable fault log
@ -2507,10 +2379,6 @@ free_iommu:
disable_dmar_iommu(iommu);
free_dmar_iommu(iommu);
}
if (si_domain) {
domain_exit(si_domain);
si_domain = NULL;
}
return ret;
}
@ -2885,12 +2753,6 @@ static int intel_iommu_add(struct dmar_drhd_unit *dmaru)
if (ret)
goto out;
if (hw_pass_through && !ecap_pass_through(iommu->ecap)) {
pr_warn("%s: Doesn't support hardware pass through.\n",
iommu->name);
return -ENXIO;
}
sp = domain_update_iommu_superpage(NULL, iommu) - 1;
if (sp >= 0 && !(cap_super_page_val(iommu->cap) & (1 << sp))) {
pr_warn("%s: Doesn't support large page.\n",
@ -3141,43 +3003,6 @@ int dmar_iommu_notify_scope_dev(struct dmar_pci_notify_info *info)
return 0;
}
static int intel_iommu_memory_notifier(struct notifier_block *nb,
unsigned long val, void *v)
{
struct memory_notify *mhp = v;
unsigned long start_vpfn = mm_to_dma_pfn_start(mhp->start_pfn);
unsigned long last_vpfn = mm_to_dma_pfn_end(mhp->start_pfn +
mhp->nr_pages - 1);
switch (val) {
case MEM_GOING_ONLINE:
if (iommu_domain_identity_map(si_domain,
start_vpfn, last_vpfn)) {
pr_warn("Failed to build identity map for [%lx-%lx]\n",
start_vpfn, last_vpfn);
return NOTIFY_BAD;
}
break;
case MEM_OFFLINE:
case MEM_CANCEL_ONLINE:
{
LIST_HEAD(freelist);
domain_unmap(si_domain, start_vpfn, last_vpfn, &freelist);
iommu_put_pages_list(&freelist);
}
break;
}
return NOTIFY_OK;
}
static struct notifier_block intel_iommu_memory_nb = {
.notifier_call = intel_iommu_memory_notifier,
.priority = 0
};
static void intel_disable_iommus(void)
{
struct intel_iommu *iommu = NULL;
@ -3474,12 +3299,7 @@ int __init intel_iommu_init(void)
iommu_pmu_register(iommu);
}
up_read(&dmar_global_lock);
if (si_domain && !hw_pass_through)
register_memory_notifier(&intel_iommu_memory_nb);
down_read(&dmar_global_lock);
if (probe_acpi_namespace_devices())
pr_warn("ACPI name space devices didn't probe correctly\n");
@ -3624,7 +3444,6 @@ static struct dmar_domain *paging_domain_alloc(struct device *dev, bool first_st
xa_init(&domain->iommu_array);
domain->nid = dev_to_node(dev);
domain->has_iotlb_device = info->ats_enabled;
domain->use_first_level = first_stage;
/* calculate the address width */
@ -3693,8 +3512,6 @@ static struct iommu_domain *intel_iommu_domain_alloc(unsigned type)
domain->geometry.force_aperture = true;
return domain;
case IOMMU_DOMAIN_IDENTITY:
return &si_domain->domain;
default:
return NULL;
}
@ -3761,8 +3578,7 @@ static void intel_iommu_domain_free(struct iommu_domain *domain)
WARN_ON(dmar_domain->nested_parent &&
!list_empty(&dmar_domain->s1_domains));
if (domain != &si_domain->domain)
domain_exit(dmar_domain);
domain_exit(dmar_domain);
}
int prepare_domain_attach_device(struct iommu_domain *domain,
@ -3812,11 +3628,9 @@ int prepare_domain_attach_device(struct iommu_domain *domain,
static int intel_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
int ret;
if (info->domain)
device_block_translation(dev);
device_block_translation(dev);
ret = prepare_domain_attach_device(domain, dev);
if (ret)
@ -4093,6 +3907,7 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev)
dev_iommu_priv_set(dev, info);
if (pdev && pci_ats_supported(pdev)) {
pci_prepare_ats(pdev, VTD_PAGE_SHIFT);
ret = device_rbtree_insert(iommu, info);
if (ret)
goto free;
@ -4114,6 +3929,16 @@ static struct iommu_device *intel_iommu_probe_device(struct device *dev)
intel_iommu_debugfs_create_dev(info);
/*
* The PCIe spec, in its wisdom, declares that the behaviour of the
* device is undefined if you enable PASID support after ATS support.
* So always enable PASID support on devices which have it, even if
* we can't yet know if we're ever going to use it.
*/
if (info->pasid_supported &&
!pci_enable_pasid(pdev, info->pasid_supported & ~1))
info->pasid_enabled = 1;
return &iommu->iommu;
free_table:
intel_pasid_free_table(dev);
@ -4130,6 +3955,11 @@ static void intel_iommu_release_device(struct device *dev)
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct intel_iommu *iommu = info->iommu;
if (info->pasid_enabled) {
pci_disable_pasid(to_pci_dev(dev));
info->pasid_enabled = 0;
}
mutex_lock(&iommu->iopf_lock);
if (dev_is_pci(dev) && pci_ats_supported(to_pci_dev(dev)))
device_rbtree_remove(info);
@ -4424,11 +4254,17 @@ static void intel_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid,
struct iommu_domain *domain)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct dmar_domain *dmar_domain = to_dmar_domain(domain);
struct dev_pasid_info *curr, *dev_pasid = NULL;
struct intel_iommu *iommu = info->iommu;
struct dmar_domain *dmar_domain;
unsigned long flags;
if (domain->type == IOMMU_DOMAIN_IDENTITY) {
intel_pasid_tear_down_entry(iommu, dev, pasid, false);
return;
}
dmar_domain = to_dmar_domain(domain);
spin_lock_irqsave(&dmar_domain->lock, flags);
list_for_each_entry(curr, &dmar_domain->dev_pasids, link_domain) {
if (curr->dev == dev && curr->pasid == pasid) {
@ -4483,9 +4319,7 @@ static int intel_iommu_set_dev_pasid(struct iommu_domain *domain,
if (ret)
goto out_detach_iommu;
if (domain_type_is_si(dmar_domain))
ret = intel_pasid_setup_pass_through(iommu, dev, pasid);
else if (dmar_domain->use_first_level)
if (dmar_domain->use_first_level)
ret = domain_setup_first_level(iommu, dmar_domain,
dev, pasid);
else
@ -4655,9 +4489,111 @@ static const struct iommu_dirty_ops intel_dirty_ops = {
.read_and_clear_dirty = intel_iommu_read_and_clear_dirty,
};
static int context_setup_pass_through(struct device *dev, u8 bus, u8 devfn)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct intel_iommu *iommu = info->iommu;
struct context_entry *context;
spin_lock(&iommu->lock);
context = iommu_context_addr(iommu, bus, devfn, 1);
if (!context) {
spin_unlock(&iommu->lock);
return -ENOMEM;
}
if (context_present(context) && !context_copied(iommu, bus, devfn)) {
spin_unlock(&iommu->lock);
return 0;
}
copied_context_tear_down(iommu, context, bus, devfn);
context_clear_entry(context);
context_set_domain_id(context, FLPT_DEFAULT_DID);
/*
* In pass through mode, AW must be programmed to indicate the largest
* AGAW value supported by hardware. And ASR is ignored by hardware.
*/
context_set_address_width(context, iommu->msagaw);
context_set_translation_type(context, CONTEXT_TT_PASS_THROUGH);
context_set_fault_enable(context);
context_set_present(context);
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(context, sizeof(*context));
context_present_cache_flush(iommu, FLPT_DEFAULT_DID, bus, devfn);
spin_unlock(&iommu->lock);
return 0;
}
static int context_setup_pass_through_cb(struct pci_dev *pdev, u16 alias, void *data)
{
struct device *dev = data;
if (dev != &pdev->dev)
return 0;
return context_setup_pass_through(dev, PCI_BUS_NUM(alias), alias & 0xff);
}
static int device_setup_pass_through(struct device *dev)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
if (!dev_is_pci(dev))
return context_setup_pass_through(dev, info->bus, info->devfn);
return pci_for_each_dma_alias(to_pci_dev(dev),
context_setup_pass_through_cb, dev);
}
static int identity_domain_attach_dev(struct iommu_domain *domain, struct device *dev)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct intel_iommu *iommu = info->iommu;
int ret;
device_block_translation(dev);
if (dev_is_real_dma_subdevice(dev))
return 0;
if (sm_supported(iommu)) {
ret = intel_pasid_setup_pass_through(iommu, dev, IOMMU_NO_PASID);
if (!ret)
iommu_enable_pci_caps(info);
} else {
ret = device_setup_pass_through(dev);
}
return ret;
}
static int identity_domain_set_dev_pasid(struct iommu_domain *domain,
struct device *dev, ioasid_t pasid)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct intel_iommu *iommu = info->iommu;
if (!pasid_supported(iommu) || dev_is_real_dma_subdevice(dev))
return -EOPNOTSUPP;
return intel_pasid_setup_pass_through(iommu, dev, pasid);
}
static struct iommu_domain identity_domain = {
.type = IOMMU_DOMAIN_IDENTITY,
.ops = &(const struct iommu_domain_ops) {
.attach_dev = identity_domain_attach_dev,
.set_dev_pasid = identity_domain_set_dev_pasid,
},
};
const struct iommu_ops intel_iommu_ops = {
.blocked_domain = &blocking_domain,
.release_domain = &blocking_domain,
.identity_domain = &identity_domain,
.capable = intel_iommu_capable,
.hw_info = intel_iommu_hw_info,
.domain_alloc = intel_iommu_domain_alloc,

128
drivers/iommu/intel/iommu.h
View File

@ -584,11 +584,23 @@ struct iommu_domain_info {
* to VT-d spec, section 9.3 */
};
/*
* We start simply by using a fixed size for the batched descriptors. This
* size is currently sufficient for our needs. Future improvements could
* involve dynamically allocating the batch buffer based on actual demand,
* allowing us to adjust the batch size for optimal performance in different
* scenarios.
*/
#define QI_MAX_BATCHED_DESC_COUNT 16
struct qi_batch {
struct qi_desc descs[QI_MAX_BATCHED_DESC_COUNT];
unsigned int index;
};
struct dmar_domain {
int nid; /* node id */
struct xarray iommu_array; /* Attached IOMMU array */
u8 has_iotlb_device: 1;
u8 iommu_coherency: 1; /* indicate coherency of iommu access */
u8 force_snooping : 1; /* Create IOPTEs with snoop control */
u8 set_pte_snp:1;
@ -609,6 +621,7 @@ struct dmar_domain {
spinlock_t cache_lock; /* Protect the cache tag list */
struct list_head cache_tags; /* Cache tag list */
struct qi_batch *qi_batch; /* Batched QI descriptors */
int iommu_superpage;/* Level of superpages supported:
0 == 4KiB (no superpages), 1 == 2MiB,
@ -1067,6 +1080,115 @@ static inline unsigned long nrpages_to_size(unsigned long npages)
return npages << VTD_PAGE_SHIFT;
}
static inline void qi_desc_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type,
struct qi_desc *desc)
{
u8 dw = 0, dr = 0;
int ih = 0;
if (cap_write_drain(iommu->cap))
dw = 1;
if (cap_read_drain(iommu->cap))
dr = 1;
desc->qw0 = QI_IOTLB_DID(did) | QI_IOTLB_DR(dr) | QI_IOTLB_DW(dw)
| QI_IOTLB_GRAN(type) | QI_IOTLB_TYPE;
desc->qw1 = QI_IOTLB_ADDR(addr) | QI_IOTLB_IH(ih)
| QI_IOTLB_AM(size_order);
desc->qw2 = 0;
desc->qw3 = 0;
}
static inline void qi_desc_dev_iotlb(u16 sid, u16 pfsid, u16 qdep, u64 addr,
unsigned int mask, struct qi_desc *desc)
{
if (mask) {
addr |= (1ULL << (VTD_PAGE_SHIFT + mask - 1)) - 1;
desc->qw1 = QI_DEV_IOTLB_ADDR(addr) | QI_DEV_IOTLB_SIZE;
} else {
desc->qw1 = QI_DEV_IOTLB_ADDR(addr);
}
if (qdep >= QI_DEV_IOTLB_MAX_INVS)
qdep = 0;
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;
}
static inline void qi_desc_piotlb(u16 did, u32 pasid, u64 addr,
unsigned long npages, bool ih,
struct qi_desc *desc)
{
if (npages == -1) {
desc->qw0 = QI_EIOTLB_PASID(pasid) |
QI_EIOTLB_DID(did) |
QI_EIOTLB_GRAN(QI_GRAN_NONG_PASID) |
QI_EIOTLB_TYPE;
desc->qw1 = 0;
} else {
int mask = ilog2(__roundup_pow_of_two(npages));
unsigned long align = (1ULL << (VTD_PAGE_SHIFT + mask));
if (WARN_ON_ONCE(!IS_ALIGNED(addr, align)))
addr = ALIGN_DOWN(addr, align);
desc->qw0 = QI_EIOTLB_PASID(pasid) |
QI_EIOTLB_DID(did) |
QI_EIOTLB_GRAN(QI_GRAN_PSI_PASID) |
QI_EIOTLB_TYPE;
desc->qw1 = QI_EIOTLB_ADDR(addr) |
QI_EIOTLB_IH(ih) |
QI_EIOTLB_AM(mask);
}
}
static inline void qi_desc_dev_iotlb_pasid(u16 sid, u16 pfsid, u32 pasid,
u16 qdep, u64 addr,
unsigned int size_order,
struct qi_desc *desc)
{
unsigned long mask = 1UL << (VTD_PAGE_SHIFT + size_order - 1);
desc->qw0 = QI_DEV_EIOTLB_PASID(pasid) | QI_DEV_EIOTLB_SID(sid) |
QI_DEV_EIOTLB_QDEP(qdep) | QI_DEIOTLB_TYPE |
QI_DEV_IOTLB_PFSID(pfsid);
/*
* If S bit is 0, we only flush a single page. If S bit is set,
* The least significant zero bit indicates the invalidation address
* range. VT-d spec 6.5.2.6.
* e.g. address bit 12[0] indicates 8KB, 13[0] indicates 16KB.
* size order = 0 is PAGE_SIZE 4KB
* Max Invs Pending (MIP) is set to 0 for now until we have DIT in
* ECAP.
*/
if (!IS_ALIGNED(addr, VTD_PAGE_SIZE << size_order))
pr_warn_ratelimited("Invalidate non-aligned address %llx, order %d\n",
addr, size_order);
/* Take page address */
desc->qw1 = QI_DEV_EIOTLB_ADDR(addr);
if (size_order) {
/*
* Existing 0s in address below size_order may be the least
* significant bit, we must set them to 1s to avoid having
* smaller size than desired.
*/
desc->qw1 |= GENMASK_ULL(size_order + VTD_PAGE_SHIFT - 1,
VTD_PAGE_SHIFT);
/* Clear size_order bit to indicate size */
desc->qw1 &= ~mask;
/* Set the S bit to indicate flushing more than 1 page */
desc->qw1 |= QI_DEV_EIOTLB_SIZE;
}
}
/* Convert value to context PASID directory size field coding. */
#define context_pdts(pds) (((pds) & 0x7) << 9)
@ -1098,13 +1220,15 @@ void qi_flush_pasid_cache(struct intel_iommu *iommu, u16 did, u64 granu,
int qi_submit_sync(struct intel_iommu *iommu, struct qi_desc *desc,
unsigned int count, unsigned long options);
void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type);
/*
* Options used in qi_submit_sync:
* QI_OPT_WAIT_DRAIN - Wait for PRQ drain completion, spec 6.5.2.8.
*/
#define QI_OPT_WAIT_DRAIN BIT(0)
void domain_update_iotlb(struct dmar_domain *domain);
int domain_attach_iommu(struct dmar_domain *domain, struct intel_iommu *iommu);
void domain_detach_iommu(struct dmar_domain *domain, struct intel_iommu *iommu);
void device_block_translation(struct device *dev);

3
drivers/iommu/intel/nested.c
View File

@ -66,8 +66,6 @@ static int intel_nested_attach_dev(struct iommu_domain *domain,
list_add(&info->link, &dmar_domain->devices);
spin_unlock_irqrestore(&dmar_domain->lock, flags);
domain_update_iotlb(dmar_domain);
return 0;
unassign_tag:
cache_tag_unassign_domain(dmar_domain, dev, IOMMU_NO_PASID);
@ -85,6 +83,7 @@ static void intel_nested_domain_free(struct iommu_domain *domain)
spin_lock(&s2_domain->s1_lock);
list_del(&dmar_domain->s2_link);
spin_unlock(&s2_domain->s1_lock);
kfree(dmar_domain->qi_batch);
kfree(dmar_domain);
}

12
drivers/iommu/intel/pasid.c
View File

@ -264,9 +264,7 @@ void intel_pasid_tear_down_entry(struct intel_iommu *iommu, struct device *dev,
else
iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH);
/* Device IOTLB doesn't need to be flushed in caching mode. */
if (!cap_caching_mode(iommu->cap))
devtlb_invalidation_with_pasid(iommu, dev, pasid);
devtlb_invalidation_with_pasid(iommu, dev, pasid);
}
/*
@ -493,9 +491,7 @@ int intel_pasid_setup_dirty_tracking(struct intel_iommu *iommu,
iommu->flush.flush_iotlb(iommu, did, 0, 0, DMA_TLB_DSI_FLUSH);
/* Device IOTLB doesn't need to be flushed in caching mode. */
if (!cap_caching_mode(iommu->cap))
devtlb_invalidation_with_pasid(iommu, dev, pasid);
devtlb_invalidation_with_pasid(iommu, dev, pasid);
return 0;
}
@ -572,9 +568,7 @@ void intel_pasid_setup_page_snoop_control(struct intel_iommu *iommu,
pasid_cache_invalidation_with_pasid(iommu, did, pasid);
qi_flush_piotlb(iommu, did, pasid, 0, -1, 0);
/* Device IOTLB doesn't need to be flushed in caching mode. */
if (!cap_caching_mode(iommu->cap))
devtlb_invalidation_with_pasid(iommu, dev, pasid);
devtlb_invalidation_with_pasid(iommu, dev, pasid);
}
/**

7
drivers/iommu/intel/svm.c
View File

@ -184,7 +184,10 @@ static void intel_mm_release(struct mmu_notifier *mn, struct mm_struct *mm)
static void intel_mm_free_notifier(struct mmu_notifier *mn)
{
kfree(container_of(mn, struct dmar_domain, notifier));
struct dmar_domain *domain = container_of(mn, struct dmar_domain, notifier);
kfree(domain->qi_batch);
kfree(domain);
}
static const struct mmu_notifier_ops intel_mmuops = {
@ -311,7 +314,7 @@ void intel_drain_pasid_prq(struct device *dev, u32 pasid)
domain = info->domain;
pdev = to_pci_dev(dev);
sid = PCI_DEVID(info->bus, info->devfn);
did = domain_id_iommu(domain, iommu);
did = domain ? domain_id_iommu(domain, iommu) : FLPT_DEFAULT_DID;
qdep = pci_ats_queue_depth(pdev);
/*

31
drivers/iommu/io-pgtable-arm.c
View File

@ -274,13 +274,13 @@ static void __arm_lpae_sync_pte(arm_lpae_iopte *ptep, int num_entries,
sizeof(*ptep) * num_entries, DMA_TO_DEVICE);
}
static void __arm_lpae_clear_pte(arm_lpae_iopte *ptep, struct io_pgtable_cfg *cfg)
static void __arm_lpae_clear_pte(arm_lpae_iopte *ptep, struct io_pgtable_cfg *cfg, int num_entries)
{
for (int i = 0; i < num_entries; i++)
ptep[i] = 0;
*ptep = 0;
if (!cfg->coherent_walk)
__arm_lpae_sync_pte(ptep, 1, cfg);
if (!cfg->coherent_walk && num_entries)
__arm_lpae_sync_pte(ptep, num_entries, cfg);
}
static size_t __arm_lpae_unmap(struct arm_lpae_io_pgtable *data,
@ -653,26 +653,29 @@ static size_t __arm_lpae_unmap(struct arm_lpae_io_pgtable *data,
max_entries = ARM_LPAE_PTES_PER_TABLE(data) - unmap_idx_start;
num_entries = min_t(int, pgcount, max_entries);
while (i < num_entries) {
pte = READ_ONCE(*ptep);
/* Find and handle non-leaf entries */
for (i = 0; i < num_entries; i++) {
pte = READ_ONCE(ptep[i]);
if (WARN_ON(!pte))
break;
__arm_lpae_clear_pte(ptep, &iop->cfg);
if (!iopte_leaf(pte, lvl, iop->fmt)) {
__arm_lpae_clear_pte(&ptep[i], &iop->cfg, 1);
/* Also flush any partial walks */
io_pgtable_tlb_flush_walk(iop, iova + i * size, size,
ARM_LPAE_GRANULE(data));
__arm_lpae_free_pgtable(data, lvl + 1, iopte_deref(pte, data));
} else if (!iommu_iotlb_gather_queued(gather)) {
io_pgtable_tlb_add_page(iop, gather, iova + i * size, size);
}
ptep++;
i++;
}
/* Clear the remaining entries */
__arm_lpae_clear_pte(ptep, &iop->cfg, i);
if (gather && !iommu_iotlb_gather_queued(gather))
for (int j = 0; j < i; j++)
io_pgtable_tlb_add_page(iop, gather, iova + j * size, size);
return i * size;
} else if (iopte_leaf(pte, lvl, iop->fmt)) {
/*

2
drivers/iommu/of_iommu.c
View File

@ -214,7 +214,7 @@ void of_iommu_get_resv_regions(struct device *dev, struct list_head *list)
* that represent reservations in the IOVA space, which are regions that should
* not be mapped.
*/
if (of_find_property(it.node, "reg", NULL)) {
if (of_property_present(it.node, "reg")) {
err = of_address_to_resource(it.node, 0, &phys);
if (err < 0) {
dev_err(dev, "failed to parse memory region %pOF: %d\n",

33
drivers/pci/ats.c
View File

@ -47,6 +47,39 @@ bool pci_ats_supported(struct pci_dev *dev)
}
EXPORT_SYMBOL_GPL(pci_ats_supported);
/**
* pci_prepare_ats - Setup the PS for ATS
* @dev: the PCI device
* @ps: the IOMMU page shift
*
* This must be done by the IOMMU driver on the PF before any VFs are created to
* ensure that the VF can have ATS enabled.
*
* Returns 0 on success, or negative on failure.
*/
int pci_prepare_ats(struct pci_dev *dev, int ps)
{
u16 ctrl;
if (!pci_ats_supported(dev))
return -EINVAL;
if (WARN_ON(dev->ats_enabled))
return -EBUSY;
if (ps < PCI_ATS_MIN_STU)
return -EINVAL;
if (dev->is_virtfn)
return 0;
dev->ats_stu = ps;
ctrl = PCI_ATS_CTRL_STU(dev->ats_stu - PCI_ATS_MIN_STU);
pci_write_config_word(dev, dev->ats_cap + PCI_ATS_CTRL, ctrl);
return 0;
}
EXPORT_SYMBOL_GPL(pci_prepare_ats);
/**
* pci_enable_ats - enable the ATS capability
* @dev: the PCI device

4
include/linux/io-pgtable.h
View File

@ -171,6 +171,10 @@ struct io_pgtable_cfg {
u64 ttbr[4];
u32 n_ttbrs;
} apple_dart_cfg;
struct {
int nid;
} amd;
};
};

3
include/linux/pci-ats.h
View File

@ -8,6 +8,7 @@
/* Address Translation Service */
bool pci_ats_supported(struct pci_dev *dev);
int pci_enable_ats(struct pci_dev *dev, int ps);
int pci_prepare_ats(struct pci_dev *dev, int ps);
void pci_disable_ats(struct pci_dev *dev);
int pci_ats_queue_depth(struct pci_dev *dev);
int pci_ats_page_aligned(struct pci_dev *dev);
@ -16,6 +17,8 @@ static inline bool pci_ats_supported(struct pci_dev *d)
{ return false; }
static inline int pci_enable_ats(struct pci_dev *d, int ps)
{ return -ENODEV; }
static inline int pci_prepare_ats(struct pci_dev *dev, int ps)
{ return -ENODEV; }
static inline void pci_disable_ats(struct pci_dev *d) { }
static inline int pci_ats_queue_depth(struct pci_dev *d)
{ return -ENODEV; }