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Merge 'drivers/iommu' from dev-main into rel-38

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Relevant changes:
9fc5b88382e6 DOWNSTREAM: iommu/arm-smmu-v3: Fix arm_smmu_impl_ops
75436e3f13e4 [DOWNSTREAM] iommu/arm-smmu-v3: Retain prod and cons after resume
b82c7a458d43 [DOWNSTREAM]: iommu/tegra241-cmdqv: WAR for 64-bit writes on NV HV
61d9b92ef30a [UPSTREAM PENDING] iommu/arm-smmu-v3: Add device-tree support in tegra241-cmdqv driver
d4303ed2cb0d DOWNSTREAM: iommu/arm-smmu-v3: Add pm suspend op
69677a732a7d [UPSTREAM PENDING] iommu/arm-smmu-v3: add suspend/resume support
15a4351b19b6 Revert "NVIDIA: SAUCE: iommu/arm-smmu-v3: add suspend/resume support"
415c7fb8e350 [DOWNSTREAM]iommu/arm-smmu-v3: use reserved memory for allocations
0d90af2451b4 iommu/tegra241-cmdqv: Fix warnings due to dmam_free_coherent()
680d181b9007 iommu/tegra241-cmdqv: Read SMMU IDR1.CMDQS instead of hardcoding
2553592d2c24 iommu/tegra241-cmdqv: do not use smp_processor_id in preemptible context
7f390db97e23 iommu/tegra241-cmdqv: Fix alignment failure at max_n_shift
0695cfe98a97 iommu/tegra241-cmdqv: Fix unused variable warning
b266c532562d iommu/tegra241-cmdqv: Staticize cmdqv_debugfs_dir
d5bdc04d1988 iommu/tegra241-cmdqv: Do not allocate vcmdq until dma_set_mask_and_coherent
0c7291931d8c iommu/tegra241-cmdqv: Drop static at local variable
aa469aa3dfa5 iommu/tegra241-cmdqv: Fix ioremap() error handling in probe()
d639d2b0554b iommu/tegra241-cmdqv: Fix -Wformat-truncation warnings in lvcmdq_error_header
2215e2358dff iommu/tegra241-cmdqv: Limit CMDs for VCMDQs of a guest owned VINTF
eefc77955d2e iommu/arm-smmu-v3: Start a new batch if new command is not supported
f70fe98429c7 iommu/arm-smmu-v3: Add in-kernel support for NVIDIA Tegra241 (Grace) CMDQV
44a9231b800b iommu/arm-smmu-v3: Add struct arm_smmu_impl_ops
b66ffedc113c iommu/arm-smmu-v3: Add acpi_smmu_iort_probe_model for impl
33f689e1cecd iommu/arm-smmu-v3: Add ARM_SMMU_OPT_TEGRA241_CMDQV
fb85f6f304f2 iommu/arm-smmu-v3: Make symbols public for CONFIG_TEGRA241_CMDQV
8e3c873d5ab3 iommu/arm-smmu-v3: Pass in cmdq pointer to arm_smmu_cmdq_init
4fae6fb536f6 iommu/arm-smmu-v3: Pass in cmdq pointer to arm_smmu_cmdq_build_sync_cmd
3c255f7d9cbd iommu/arm-smmu-v3: Issue a batch of commands to the same cmdq

Change-Id: I3e28a37c04d9bbfb6e22a1bc51771bc83db11b07
Signed-off-by: Ashish Mhetre <amhetre@nvidia.com>
This commit is contained in:
Ashish Mhetre
2025-11-20 10:23:59 +00:00
parent 4821cdbb60 5865348c39
commit e3677b3425
6 changed files with 1257 additions and 98 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
MAINTAINERS
View File

@@ -21625,6 +21625,7 @@ 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*

12
drivers/iommu/Kconfig
View File

@@ -406,6 +406,18 @@ config ARM_SMMU_V3_SVA
Say Y here if your system supports SVA extensions such as PCIe PASID
and PRI.
config TEGRA241_CMDQV
bool "NVIDIA Tegra241 CMDQ-V extension support for ARM SMMUv3"
depends on ARM_SMMU_V3
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.
config S390_IOMMU
def_bool y if S390 && PCI
depends on S390 && PCI

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

@@ -2,4 +2,5 @@
obj-$(CONFIG_ARM_SMMU_V3) += arm_smmu_v3.o
arm_smmu_v3-objs-y += arm-smmu-v3.o
arm_smmu_v3-objs-$(CONFIG_ARM_SMMU_V3_SVA) += arm-smmu-v3-sva.o
arm_smmu_v3-objs-$(CONFIG_TEGRA241_CMDQV) += tegra241-cmdqv.o
arm_smmu_v3-objs := $(arm_smmu_v3-objs-y)

357
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
View File

@@ -2,7 +2,8 @@
/*
* IOMMU API for ARM architected SMMUv3 implementations.
*
* Copyright (C) 2015 ARM Limited
* SPDX-FileCopyrightText: Copyright (C) 2015 ARM Limited
* SPDX-FileCopyrightText: Copyright (c) 2023-2025, NVIDIA CORPORATION. All rights reserved.
*
* Author: Will Deacon <will.deacon@arm.com>
*
@@ -23,6 +24,7 @@
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/of_reserved_mem.h>
#include <linux/pci.h>
#include <linux/pci-ats.h>
#include <linux/platform_device.h>
@@ -345,14 +347,30 @@ static int arm_smmu_cmdq_build_cmd(u64 *cmd, struct arm_smmu_cmdq_ent *ent)
return 0;
}
static struct arm_smmu_cmdq *arm_smmu_get_cmdq(struct arm_smmu_device *smmu)
static struct arm_smmu_cmdq *arm_smmu_get_cmdq(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq_ent *ent)
{
return &smmu->cmdq;
struct arm_smmu_cmdq *cmdq = NULL;
if (smmu->impl_ops && smmu->impl_ops->get_secondary_cmdq)
cmdq = smmu->impl_ops->get_secondary_cmdq(smmu, ent);
return cmdq ?: &smmu->cmdq;
}
static bool arm_smmu_cmdq_needs_busy_polling(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq)
{
if (cmdq == &smmu->cmdq)
return false;
return smmu->options & ARM_SMMU_OPT_TEGRA241_CMDQV;
}
static void arm_smmu_cmdq_build_sync_cmd(u64 *cmd, struct arm_smmu_device *smmu,
struct arm_smmu_queue *q, u32 prod)
struct arm_smmu_cmdq *cmdq, u32 prod)
{
struct arm_smmu_queue *q = &cmdq->q;
struct arm_smmu_cmdq_ent ent = {
.opcode = CMDQ_OP_CMD_SYNC,
};
@@ -367,10 +385,12 @@ static void arm_smmu_cmdq_build_sync_cmd(u64 *cmd, struct arm_smmu_device *smmu,
}
arm_smmu_cmdq_build_cmd(cmd, &ent);
if (arm_smmu_cmdq_needs_busy_polling(smmu, cmdq))
u64p_replace_bits(cmd, CMDQ_SYNC_0_CS_NONE, CMDQ_SYNC_0_CS);
}
static void __arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu,
struct arm_smmu_queue *q)
void __arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq)
{
static const char * const cerror_str[] = {
[CMDQ_ERR_CERROR_NONE_IDX] = "No error",
@@ -378,6 +398,7 @@ static void __arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu,
[CMDQ_ERR_CERROR_ABT_IDX] = "Abort on command fetch",
[CMDQ_ERR_CERROR_ATC_INV_IDX] = "ATC invalidate timeout",
};
struct arm_smmu_queue *q = &cmdq->q;
int i;
u64 cmd[CMDQ_ENT_DWORDS];
@@ -420,13 +441,15 @@ static void __arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu,
/* Convert the erroneous command into a CMD_SYNC */
arm_smmu_cmdq_build_cmd(cmd, &cmd_sync);
if (arm_smmu_cmdq_needs_busy_polling(smmu, cmdq))
u64p_replace_bits(cmd, CMDQ_SYNC_0_CS_NONE, CMDQ_SYNC_0_CS);
queue_write(Q_ENT(q, cons), cmd, q->ent_dwords);
}
static void arm_smmu_cmdq_skip_err(struct arm_smmu_device *smmu)
{
__arm_smmu_cmdq_skip_err(smmu, &smmu->cmdq.q);
__arm_smmu_cmdq_skip_err(smmu, &smmu->cmdq);
}
/*
@@ -591,11 +614,11 @@ static void arm_smmu_cmdq_poll_valid_map(struct arm_smmu_cmdq *cmdq,
/* Wait for the command queue to become non-full */
static int arm_smmu_cmdq_poll_until_not_full(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq,
struct arm_smmu_ll_queue *llq)
{
unsigned long flags;
struct arm_smmu_queue_poll qp;
struct arm_smmu_cmdq *cmdq = arm_smmu_get_cmdq(smmu);
int ret = 0;
/*
@@ -626,11 +649,11 @@ static int arm_smmu_cmdq_poll_until_not_full(struct arm_smmu_device *smmu,
* Must be called with the cmdq lock held in some capacity.
*/
static int __arm_smmu_cmdq_poll_until_msi(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq,
struct arm_smmu_ll_queue *llq)
{
int ret = 0;
struct arm_smmu_queue_poll qp;
struct arm_smmu_cmdq *cmdq = arm_smmu_get_cmdq(smmu);
u32 *cmd = (u32 *)(Q_ENT(&cmdq->q, llq->prod));
queue_poll_init(smmu, &qp);
@@ -650,10 +673,10 @@ static int __arm_smmu_cmdq_poll_until_msi(struct arm_smmu_device *smmu,
* Must be called with the cmdq lock held in some capacity.
*/
static int __arm_smmu_cmdq_poll_until_consumed(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq,
struct arm_smmu_ll_queue *llq)
{
struct arm_smmu_queue_poll qp;
struct arm_smmu_cmdq *cmdq = arm_smmu_get_cmdq(smmu);
u32 prod = llq->prod;
int ret = 0;
@@ -700,12 +723,14 @@ static int __arm_smmu_cmdq_poll_until_consumed(struct arm_smmu_device *smmu,
}
static int arm_smmu_cmdq_poll_until_sync(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq,
struct arm_smmu_ll_queue *llq)
{
if (smmu->options & ARM_SMMU_OPT_MSIPOLL)
return __arm_smmu_cmdq_poll_until_msi(smmu, llq);
if (smmu->options & ARM_SMMU_OPT_MSIPOLL &&
!arm_smmu_cmdq_needs_busy_polling(smmu, cmdq))
return __arm_smmu_cmdq_poll_until_msi(smmu, cmdq, llq);
return __arm_smmu_cmdq_poll_until_consumed(smmu, llq);
return __arm_smmu_cmdq_poll_until_consumed(smmu, cmdq, llq);
}
static void arm_smmu_cmdq_write_entries(struct arm_smmu_cmdq *cmdq, u64 *cmds,
@@ -742,13 +767,13 @@ static void arm_smmu_cmdq_write_entries(struct arm_smmu_cmdq *cmdq, u64 *cmds,
* CPU will appear before any of the commands from the other CPU.
*/
static int arm_smmu_cmdq_issue_cmdlist(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq,
u64 *cmds, int n, bool sync)
{
u64 cmd_sync[CMDQ_ENT_DWORDS];
u32 prod;
unsigned long flags;
bool owner;
struct arm_smmu_cmdq *cmdq = arm_smmu_get_cmdq(smmu);
struct arm_smmu_ll_queue llq, head;
int ret = 0;
@@ -762,7 +787,7 @@ static int arm_smmu_cmdq_issue_cmdlist(struct arm_smmu_device *smmu,
while (!queue_has_space(&llq, n + sync)) {
local_irq_restore(flags);
if (arm_smmu_cmdq_poll_until_not_full(smmu, &llq))
if (arm_smmu_cmdq_poll_until_not_full(smmu, cmdq, &llq))
dev_err_ratelimited(smmu->dev, "CMDQ timeout\n");
local_irq_save(flags);
}
@@ -788,7 +813,7 @@ static int arm_smmu_cmdq_issue_cmdlist(struct arm_smmu_device *smmu,
arm_smmu_cmdq_write_entries(cmdq, cmds, llq.prod, n);
if (sync) {
prod = queue_inc_prod_n(&llq, n);
arm_smmu_cmdq_build_sync_cmd(cmd_sync, smmu, &cmdq->q, prod);
arm_smmu_cmdq_build_sync_cmd(cmd_sync, smmu, cmdq, prod);
queue_write(Q_ENT(&cmdq->q, prod), cmd_sync, CMDQ_ENT_DWORDS);
/*
@@ -838,7 +863,7 @@ static int arm_smmu_cmdq_issue_cmdlist(struct arm_smmu_device *smmu,
/* 5. If we are inserting a CMD_SYNC, we must wait for it to complete */
if (sync) {
llq.prod = queue_inc_prod_n(&llq, n);
ret = arm_smmu_cmdq_poll_until_sync(smmu, &llq);
ret = arm_smmu_cmdq_poll_until_sync(smmu, cmdq, &llq);
if (ret) {
dev_err_ratelimited(smmu->dev,
"CMD_SYNC timeout at 0x%08x [hwprod 0x%08x, hwcons 0x%08x]\n",
@@ -873,7 +898,8 @@ static int __arm_smmu_cmdq_issue_cmd(struct arm_smmu_device *smmu,
return -EINVAL;
}
return arm_smmu_cmdq_issue_cmdlist(smmu, cmd, 1, sync);
return arm_smmu_cmdq_issue_cmdlist(
smmu, arm_smmu_get_cmdq(smmu, ent), cmd, 1, sync);
}
static int arm_smmu_cmdq_issue_cmd(struct arm_smmu_device *smmu,
@@ -888,21 +914,33 @@ static int arm_smmu_cmdq_issue_cmd_with_sync(struct arm_smmu_device *smmu,
return __arm_smmu_cmdq_issue_cmd(smmu, ent, true);
}
static void arm_smmu_cmdq_batch_init(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq_batch *cmds,
struct arm_smmu_cmdq_ent *ent)
{
cmds->num = 0;
cmds->cmdq = arm_smmu_get_cmdq(smmu, ent);
}
static void arm_smmu_cmdq_batch_add(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq_batch *cmds,
struct arm_smmu_cmdq_ent *cmd)
{
bool unsupported_cmd = !arm_smmu_cmdq_supports_cmd(cmds->cmdq, cmd);
bool force_sync = (cmds->num == CMDQ_BATCH_ENTRIES - 1) &&
(smmu->options & ARM_SMMU_OPT_CMDQ_FORCE_SYNC);
int index;
if (cmds->num == CMDQ_BATCH_ENTRIES - 1 &&
(smmu->options & ARM_SMMU_OPT_CMDQ_FORCE_SYNC)) {
arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmds, cmds->num, true);
cmds->num = 0;
if (force_sync || unsupported_cmd) {
arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmdq, cmds->cmds,
cmds->num, true);
arm_smmu_cmdq_batch_init(smmu, cmds, cmd);
}
if (cmds->num == CMDQ_BATCH_ENTRIES) {
arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmds, cmds->num, false);
cmds->num = 0;
arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmdq, cmds->cmds,
cmds->num, false);
arm_smmu_cmdq_batch_init(smmu, cmds, cmd);
}
index = cmds->num * CMDQ_ENT_DWORDS;
@@ -918,7 +956,9 @@ static void arm_smmu_cmdq_batch_add(struct arm_smmu_device *smmu,
static int arm_smmu_cmdq_batch_submit(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq_batch *cmds)
{
return arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmds, cmds->num, true);
return arm_smmu_cmdq_issue_cmdlist(smmu, cmds->cmdq, cmds->cmds,
cmds->num, true);
}
static int arm_smmu_page_response(struct device *dev,
@@ -985,7 +1025,7 @@ static void arm_smmu_sync_cd(struct arm_smmu_master *master,
},
};
cmds.num = 0;
arm_smmu_cmdq_batch_init(smmu, &cmds, &cmd);
for (i = 0; i < master->num_streams; i++) {
cmd.cfgi.sid = master->streams[i].id;
arm_smmu_cmdq_batch_add(smmu, &cmds, &cmd);
@@ -1786,7 +1826,7 @@ static int arm_smmu_atc_inv_master(struct arm_smmu_master *master)
arm_smmu_atc_inv_to_cmd(IOMMU_NO_PASID, 0, 0, &cmd);
cmds.num = 0;
arm_smmu_cmdq_batch_init(master->smmu, &cmds, &cmd);
for (i = 0; i < master->num_streams; i++) {
cmd.atc.sid = master->streams[i].id;
arm_smmu_cmdq_batch_add(master->smmu, &cmds, &cmd);
@@ -1800,7 +1840,9 @@ int arm_smmu_atc_inv_domain(struct arm_smmu_domain *smmu_domain, int ssid,
{
int i;
unsigned long flags;
struct arm_smmu_cmdq_ent cmd;
struct arm_smmu_cmdq_ent cmd = {
.opcode = CMDQ_OP_ATC_INV,
};
struct arm_smmu_master *master;
struct arm_smmu_cmdq_batch cmds;
@@ -1826,7 +1868,7 @@ int arm_smmu_atc_inv_domain(struct arm_smmu_domain *smmu_domain, int ssid,
arm_smmu_atc_inv_to_cmd(ssid, iova, size, &cmd);
cmds.num = 0;
arm_smmu_cmdq_batch_init(smmu_domain->smmu, &cmds, &cmd);
spin_lock_irqsave(&smmu_domain->devices_lock, flags);
list_for_each_entry(master, &smmu_domain->devices, domain_head) {
@@ -1903,7 +1945,7 @@ static void __arm_smmu_tlb_inv_range(struct arm_smmu_cmdq_ent *cmd,
num_pages++;
}
cmds.num = 0;
arm_smmu_cmdq_batch_init(smmu, &cmds, cmd);
while (iova < end) {
if (smmu->features & ARM_SMMU_FEAT_RANGE_INV) {
@@ -2872,12 +2914,10 @@ static struct iommu_ops arm_smmu_ops = {
};
/* Probing and initialisation functions */
static 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_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)
{
size_t qsz;
@@ -2915,9 +2955,9 @@ static int arm_smmu_init_one_queue(struct arm_smmu_device *smmu,
return 0;
}
static int arm_smmu_cmdq_init(struct arm_smmu_device *smmu)
int arm_smmu_cmdq_init(struct arm_smmu_device *smmu,
struct arm_smmu_cmdq *cmdq)
{
struct arm_smmu_cmdq *cmdq = &smmu->cmdq;
unsigned int nents = 1 << cmdq->q.llq.max_n_shift;
atomic_set(&cmdq->owner_prod, 0);
@@ -2942,7 +2982,7 @@ static int arm_smmu_init_queues(struct arm_smmu_device *smmu)
if (ret)
return ret;
ret = arm_smmu_cmdq_init(smmu);
ret = arm_smmu_cmdq_init(smmu, &smmu->cmdq);
if (ret)
return ret;
@@ -3088,7 +3128,14 @@ static int arm_smmu_init_structures(struct arm_smmu_device *smmu)
if (ret)
return ret;
return arm_smmu_init_strtab(smmu);
ret = arm_smmu_init_strtab(smmu);
if (ret)
return ret;
if (smmu->impl_ops && smmu->impl_ops->init_structures)
return smmu->impl_ops->init_structures(smmu);
return 0;
}
static int arm_smmu_write_reg_sync(struct arm_smmu_device *smmu, u32 val,
@@ -3149,6 +3196,15 @@ static void arm_smmu_setup_msis(struct arm_smmu_device *smmu)
int ret, nvec = ARM_SMMU_MAX_MSIS;
struct device *dev = smmu->dev;
/* Clear the MSI address regs */
writeq_relaxed(0, smmu->base + ARM_SMMU_GERROR_IRQ_CFG0);
writeq_relaxed(0, smmu->base + ARM_SMMU_EVTQ_IRQ_CFG0);
if (smmu->features & ARM_SMMU_FEAT_PRI)
writeq_relaxed(0, smmu->base + ARM_SMMU_PRIQ_IRQ_CFG0);
else
nvec--;
if (!(smmu->features & ARM_SMMU_FEAT_MSI))
return;
@@ -3157,9 +3213,6 @@ static void arm_smmu_setup_msis(struct arm_smmu_device *smmu)
return;
}
if (!(smmu->features & ARM_SMMU_FEAT_PRI))
nvec--;
/* Allocate MSIs for evtq, gerror and priq. Ignore cmdq */
ret = platform_msi_domain_alloc_irqs(dev, nvec, arm_smmu_write_msi_msg);
if (ret) {
@@ -3221,9 +3274,9 @@ static void arm_smmu_setup_unique_irqs(struct arm_smmu_device *smmu)
}
}
static int arm_smmu_reset_irqs(struct arm_smmu_device *smmu)
static int arm_smmu_setup_irqs(struct arm_smmu_device *smmu)
{
int ret;
int ret, irq;
u32 irqen_flags = IRQ_CTRL_EVTQ_IRQEN | IRQ_CTRL_GERROR_IRQEN;
/* Disable IRQs first */
@@ -3234,35 +3287,7 @@ static int arm_smmu_reset_irqs(struct arm_smmu_device *smmu)
return ret;
}
if (!smmu->combined_irq) {
/*
* Clear the MSI address regs. These registers will be reset
* in arm_smmu_write_msi_msg callback function by irq_domain
* upon a new MSI message.
*/
writeq_relaxed(0, smmu->base + ARM_SMMU_GERROR_IRQ_CFG0);
writeq_relaxed(0, smmu->base + ARM_SMMU_EVTQ_IRQ_CFG0);
if (smmu->features & ARM_SMMU_FEAT_PRI)
writeq_relaxed(0, smmu->base + ARM_SMMU_PRIQ_IRQ_CFG0);
}
if (smmu->features & ARM_SMMU_FEAT_PRI)
irqen_flags |= IRQ_CTRL_PRIQ_IRQEN;
/* Enable interrupt generation on the SMMU */
ret = arm_smmu_write_reg_sync(smmu, irqen_flags,
ARM_SMMU_IRQ_CTRL, ARM_SMMU_IRQ_CTRLACK);
if (ret)
dev_warn(smmu->dev, "failed to enable irqs\n");
return ret;
}
static int arm_smmu_setup_irqs(struct arm_smmu_device *smmu)
{
int ret = 0, irq = smmu->combined_irq;
irq = smmu->combined_irq;
if (irq) {
/*
* Cavium ThunderX2 implementation doesn't support unique irq
@@ -3278,7 +3303,16 @@ static int arm_smmu_setup_irqs(struct arm_smmu_device *smmu)
} else
arm_smmu_setup_unique_irqs(smmu);
return ret;
if (smmu->features & ARM_SMMU_FEAT_PRI)
irqen_flags |= IRQ_CTRL_PRIQ_IRQEN;
/* Enable interrupt generation on the SMMU */
ret = arm_smmu_write_reg_sync(smmu, irqen_flags,
ARM_SMMU_IRQ_CTRL, ARM_SMMU_IRQ_CTRLACK);
if (ret)
dev_warn(smmu->dev, "failed to enable irqs\n");
return 0;
}
static int arm_smmu_device_disable(struct arm_smmu_device *smmu)
@@ -3292,7 +3326,7 @@ static int arm_smmu_device_disable(struct arm_smmu_device *smmu)
return ret;
}
static int arm_smmu_device_reset(struct arm_smmu_device *smmu)
static int arm_smmu_device_reset(struct arm_smmu_device *smmu, bool bypass)
{
int ret;
u32 reg, enables;
@@ -3400,17 +3434,11 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu)
}
}
ret = arm_smmu_reset_irqs(smmu);
if (ret) {
dev_err(smmu->dev, "failed to reset irqs\n");
return ret;
}
if (is_kdump_kernel())
enables &= ~(CR0_EVTQEN | CR0_PRIQEN);
/* Enable the SMMU interface, or ensure bypass */
if (!smmu->bypass || disable_bypass) {
if (!bypass || disable_bypass) {
enables |= CR0_SMMUEN;
} else {
ret = arm_smmu_update_gbpa(smmu, 0, GBPA_ABORT);
@@ -3424,6 +3452,14 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu)
return ret;
}
if (smmu->impl_ops && smmu->impl_ops->device_reset) {
ret = smmu->impl_ops->device_reset(smmu);
if (ret) {
dev_err(smmu->dev, "failed to reset impl\n");
return ret;
}
}
return 0;
}
@@ -3685,19 +3721,84 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
return 0;
}
#ifdef CONFIG_ACPI
static void acpi_smmu_get_options(u32 model, struct arm_smmu_device *smmu)
#ifdef CONFIG_TEGRA241_CMDQV
static void tegra_cmdqv_dt_probe(struct device_node *smmu_node,
struct arm_smmu_device *smmu)
{
switch (model) {
struct platform_device *pdev;
struct device_node *np;
np = of_parse_phandle(smmu_node, "nvidia,cmdqv", 0);
if (!np)
return;
pdev = of_find_device_by_node(np);
of_node_put(np);
if (!pdev)
return;
smmu->impl_dev = &pdev->dev;
smmu->options |= ARM_SMMU_OPT_TEGRA241_CMDQV;
dev_info(smmu->dev, "found companion CMDQV device: %s\n",
dev_name(smmu->impl_dev));
}
#else
static void tegra_cmdqv_dt_probe(struct device_node *smmu_node,
struct arm_smmu_device *smmu)
{
}
#endif
#ifdef CONFIG_ACPI
#ifdef CONFIG_TEGRA241_CMDQV
static void acpi_smmu_dsdt_probe_tegra241_cmdqv(struct acpi_iort_node *node,
struct arm_smmu_device *smmu)
{
const char *uid = kasprintf(GFP_KERNEL, "%u", node->identifier);
struct acpi_device *adev;
/* Look for an NVDA200C node whose _UID matches the SMMU node ID */
adev = acpi_dev_get_first_match_dev("NVDA200C", uid, -1);
if (adev) {
/* Tegra241 CMDQV driver is responsible for put_device() */
smmu->impl_dev = &adev->dev;
smmu->options |= ARM_SMMU_OPT_TEGRA241_CMDQV;
dev_info(smmu->dev, "found companion CMDQV device: %s\n",
dev_name(smmu->impl_dev));
}
kfree(uid);
}
#else
static void acpi_smmu_dsdt_probe_tegra241_cmdqv(struct acpi_iort_node *node,
struct arm_smmu_device *smmu)
{
}
#endif
static int acpi_smmu_iort_probe_model(struct acpi_iort_node *node,
struct arm_smmu_device *smmu)
{
struct acpi_iort_smmu_v3 *iort_smmu =
(struct acpi_iort_smmu_v3 *)node->node_data;
switch (iort_smmu->model) {
case ACPI_IORT_SMMU_V3_CAVIUM_CN99XX:
smmu->options |= ARM_SMMU_OPT_PAGE0_REGS_ONLY;
break;
case ACPI_IORT_SMMU_V3_HISILICON_HI161X:
smmu->options |= ARM_SMMU_OPT_SKIP_PREFETCH;
break;
case ACPI_IORT_SMMU_V3_GENERIC:
/*
* Tegra241 implementation stores its SMMU options and impl_dev
* in DSDT. Thus, go through the ACPI tables unconditionally.
*/
acpi_smmu_dsdt_probe_tegra241_cmdqv(node, smmu);
break;
}
dev_notice(smmu->dev, "option mask 0x%x\n", smmu->options);
return 0;
}
static int arm_smmu_device_acpi_probe(struct platform_device *pdev,
@@ -3712,12 +3813,10 @@ static int arm_smmu_device_acpi_probe(struct platform_device *pdev,
/* Retrieve SMMUv3 specific data */
iort_smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
acpi_smmu_get_options(iort_smmu->model, smmu);
if (iort_smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE)
smmu->features |= ARM_SMMU_FEAT_COHERENCY;
return 0;
return acpi_smmu_iort_probe_model(node, smmu);
}
#else
static inline int arm_smmu_device_acpi_probe(struct platform_device *pdev,
@@ -3734,6 +3833,9 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev,
u32 cells;
int ret = -EINVAL;
if (!of_reserved_mem_device_init(dev))
dev_info(dev, "using device-specific reserved memory\n");
if (of_property_read_u32(dev->of_node, "#iommu-cells", &cells))
dev_err(dev, "missing #iommu-cells property\n");
else if (cells != 1)
@@ -3746,6 +3848,8 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev,
if (of_dma_is_coherent(dev->of_node))
smmu->features |= ARM_SMMU_FEAT_COHERENCY;
tegra_cmdqv_dt_probe(dev->of_node, smmu);
return ret;
}
@@ -3795,6 +3899,39 @@ static void arm_smmu_rmr_install_bypass_ste(struct arm_smmu_device *smmu)
iort_put_rmr_sids(dev_fwnode(smmu->dev), &rmr_list);
}
static void arm_smmu_impl_remove(void *data)
{
struct arm_smmu_device *smmu = data;
if (smmu->impl_ops && smmu->impl_ops->device_remove)
smmu->impl_ops->device_remove(smmu);
}
/*
* Probe all the compiled in implementations. Each one checks to see if it
* matches this HW and if so returns a devm_krealloc'd arm_smmu_device which
* replaces the callers. Otherwise the original is returned or ERR_PTR.
*/
static struct arm_smmu_device *arm_smmu_impl_probe(struct arm_smmu_device *smmu)
{
struct arm_smmu_device *new_smmu = ERR_PTR(-ENODEV);
int ret;
if (smmu->impl_dev && (smmu->options & ARM_SMMU_OPT_TEGRA241_CMDQV))
new_smmu = tegra241_cmdqv_probe(smmu);
if (new_smmu == ERR_PTR(-ENODEV))
return smmu;
if (IS_ERR(new_smmu))
return new_smmu;
ret = devm_add_action_or_reset(new_smmu->dev, arm_smmu_impl_remove,
new_smmu);
if (ret)
return ERR_PTR(ret);
return new_smmu;
}
static int arm_smmu_device_probe(struct platform_device *pdev)
{
int irq, ret;
@@ -3815,10 +3952,13 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
if (ret == -ENODEV)
return ret;
}
/* Set bypass mode according to firmware probing result */
smmu->bypass = !!ret;
smmu = arm_smmu_impl_probe(smmu);
if (IS_ERR(smmu))
return PTR_ERR(smmu);
/* Base address */
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res)
@@ -3880,15 +4020,17 @@ static int arm_smmu_device_probe(struct platform_device *pdev)
/* Check for RMRs and install bypass STEs if any */
arm_smmu_rmr_install_bypass_ste(smmu);
ret = arm_smmu_setup_irqs(smmu);
if (ret)
return ret;
/* Reset the device */
ret = arm_smmu_device_reset(smmu);
ret = arm_smmu_device_reset(smmu, smmu->bypass);
if (ret)
goto err_disable;
ret = arm_smmu_setup_irqs(smmu);
if (ret) {
dev_err(smmu->dev, "failed to setup irqs\n");
return ret;
}
/* And we're up. Go go go! */
ret = iommu_device_sysfs_add(&smmu->iommu, dev, NULL,
"smmu3.%pa", &ioaddr);
@@ -3946,11 +4088,32 @@ static int __maybe_unused arm_smmu_runtime_resume(struct device *dev)
{
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
return arm_smmu_device_reset(smmu);
dev_dbg(dev, "Resuming\n");
arm_smmu_device_reset(smmu, smmu->bypass);
return 0;
}
static int __maybe_unused arm_smmu_runtime_suspend(struct device *dev)
{
struct arm_smmu_device *smmu = dev_get_drvdata(dev);
struct arm_smmu_cmdq_ent cmd;
cmd.opcode = CMDQ_OP_CFGI_ALL;
arm_smmu_cmdq_issue_cmd_with_sync(smmu, &cmd);
cmd.opcode = CMDQ_OP_TLBI_NSNH_ALL;
arm_smmu_cmdq_issue_cmd_with_sync(smmu, &cmd);
dev_dbg(dev, "Disabling\n");
arm_smmu_device_disable(smmu);
dev_dbg(dev, "Suspending\n");
return 0;
}
static const struct dev_pm_ops arm_smmu_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(NULL, arm_smmu_runtime_resume)
SET_LATE_SYSTEM_SLEEP_PM_OPS(arm_smmu_runtime_suspend, arm_smmu_runtime_resume)
};
static struct platform_driver arm_smmu_driver = {

43
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)
@@ -555,10 +557,18 @@ 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;
};
@@ -623,9 +633,20 @@ struct arm_smmu_strtab_cfg {
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;
@@ -655,6 +676,7 @@ 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;
@@ -686,7 +708,7 @@ struct arm_smmu_device {
struct rb_root streams;
struct mutex streams_mutex;
bool bypass;
bool bypass;
};
struct arm_smmu_stream {
@@ -760,6 +782,15 @@ bool arm_smmu_free_asid(struct arm_smmu_ctx_desc *cd);
int arm_smmu_atc_inv_domain(struct arm_smmu_domain *smmu_domain, int ssid,
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);
@@ -815,4 +846,14 @@ static inline void arm_smmu_sva_remove_dev_pasid(struct iommu_domain *domain,
{
}
#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 */

941
drivers/iommu/arm/arm-smmu-v3/tegra241-cmdqv.c Normal file
View File

@@ -0,0 +1,941 @@
// 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 <linux/of_platform.h>
#include <linux/platform_device.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 TEGRA241_VCMDQ_BASE 0x00000
#define TEGRA241_VCMDQ_BASE_H 0x00004
#define TEGRA241_VCMDQ_CONS_INDX_BASE 0x00008
#define TEGRA241_VCMDQ_CONS_INDX_BASE_H 0x0000C
/* 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 = raw_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));
writel_relaxed(0, REG_VCMDQ_PAGE1(vcmdq, BASE_H));
writel_relaxed(0, REG_VCMDQ_PAGE1(vcmdq, BASE));
writel_relaxed(0, REG_VCMDQ_PAGE1(vcmdq, CONS_INDX_BASE_H));
writel_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 */
writel_relaxed(upper_32_bits(vcmdq->cmdq.q.q_base), REG_VCMDQ_PAGE1(vcmdq, BASE_H));
writel_relaxed(lower_32_bits(vcmdq->cmdq.q.q_base), REG_VCMDQ_PAGE1(vcmdq, BASE));
writel_relaxed(vcmdq->cmdq.q.llq.prod, REG_VCMDQ_PAGE0(vcmdq, PROD));
writel_relaxed(vcmdq->cmdq.q.llq.cons, REG_VCMDQ_PAGE0(vcmdq, CONS));
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 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];
u32 regval;
int ret;
snprintf(name, 16, "vcmdq%u", vcmdq->idx);
/* Cap queue size to SMMU's IDR1.CMDQS and ensure natural alignment */
regval = readl_relaxed(smmu->base + ARM_SMMU_IDR1);
q->llq.max_n_shift =
min_t(u32, CMDQ_MAX_SZ_SHIFT, FIELD_GET(IDR1_CMDQS, regval));
/* 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];
/* Note that the lvcmdq queue memory space is managed by devres */
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 struct resource *
tegra241_cmdqv_find_dt_resource(struct device *dev, int *irq)
{
struct platform_device *pdev = to_platform_device(dev);
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(dev, "no memory resource found for CMDQV\n");
return NULL;
}
if (irq)
*irq = platform_get_irq_byname_optional(pdev, "cmdqv");
if (!irq || *irq <= 0)
dev_warn(dev, "no interrupt. errors will not be reported\n");
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)
return -ENOMEM;
/* 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);
return ret;
}
/* 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))
return PTR_ERR(vcmdq);
}
/* Now, we are ready to run all the impl ops */
smmu->impl_ops = &tegra241_cmdqv_impl_ops;
return 0;
}
#ifdef CONFIG_IOMMU_DEBUGFS
static struct dentry *cmdqv_debugfs_dir;
#endif
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);
else
res = tegra241_cmdqv_find_dt_resource(smmu->impl_dev, &irq);
if (!res)
goto out_fallback;
new_smmu = __tegra241_cmdqv_probe(smmu, res, irq);
if (!smmu->dev->of_node)
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);
}
static const struct of_device_id tegra241_cmdqv_of_match[] = {
{ .compatible = "nvidia,tegra264-cmdqv" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tegra241_cmdqv_of_match);
static struct platform_driver tegra241_cmdqv_driver = {
.driver = {
.name = "tegra241-cmdqv",
.of_match_table = tegra241_cmdqv_of_match,
},
};
module_platform_driver(tegra241_cmdqv_driver);
MODULE_DESCRIPTION("NVIDIA Tegra241 Command Queue Virtualization Driver");
MODULE_LICENSE("GPL v2");