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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 1/8] xen/iommu: arm: Remove temporary the SMMU driver
The current SMMU driver has completly diverged. That makes me hard to
maintain.
Signed-off-by: Julien Grall <julien.grall@xxxxxxxxxx>
Acked-by: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
---
Currently none of the platform used on OSStest has SMMU nodes
described in the device tree. Therefore, the bisector won't be
impacted by this changeset.
Changes in v4:
- Add Ian's ack
Changes in v3:
- Add Stefano's ack
---
xen/drivers/passthrough/arm/Makefile | 1 -
xen/drivers/passthrough/arm/smmu.c | 1784 ----------------------------------
2 files changed, 1785 deletions(-)
delete mode 100644 xen/drivers/passthrough/arm/smmu.c
diff --git a/xen/drivers/passthrough/arm/Makefile
b/xen/drivers/passthrough/arm/Makefile
index f4cd26e..0484b79 100644
--- a/xen/drivers/passthrough/arm/Makefile
+++ b/xen/drivers/passthrough/arm/Makefile
@@ -1,2 +1 @@
obj-y += iommu.o
-obj-y += smmu.o
diff --git a/xen/drivers/passthrough/arm/smmu.c
b/xen/drivers/passthrough/arm/smmu.c
deleted file mode 100644
index 42bde75..0000000
--- a/xen/drivers/passthrough/arm/smmu.c
+++ /dev/null
@@ -1,1784 +0,0 @@
-/*
- * IOMMU API for ARM architected SMMU implementations.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Based on Linux drivers/iommu/arm-smmu.c (commit 89a23cd)
- * Copyright (C) 2013 ARM Limited
- *
- * Author: Will Deacon <will.deacon@xxxxxxx>
- *
- * Xen modification:
- * Julien Grall <julien.grall@xxxxxxxxxx>
- * Copyright (C) 2014 Linaro Limited.
- *
- * This driver currently supports:
- * - SMMUv1 and v2 implementations (didn't try v2 SMMU)
- * - Stream-matching and stream-indexing
- * - v7/v8 long-descriptor format
- * - Non-secure access to the SMMU
- * - 4k pages, p2m shared with the processor
- * - Up to 40-bit addressing
- * - Context fault reporting
- */
-
-#include <xen/config.h>
-#include <xen/delay.h>
-#include <xen/errno.h>
-#include <xen/irq.h>
-#include <xen/lib.h>
-#include <xen/list.h>
-#include <xen/mm.h>
-#include <xen/vmap.h>
-#include <xen/rbtree.h>
-#include <xen/sched.h>
-#include <asm/atomic.h>
-#include <asm/device.h>
-#include <asm/io.h>
-#include <asm/platform.h>
-
-/* Driver options */
-#define SMMU_OPT_SECURE_CONFIG_ACCESS (1 << 0)
-
-/* Maximum number of stream IDs assigned to a single device */
-#define MAX_MASTER_STREAMIDS MAX_PHANDLE_ARGS
-
-/* Maximum stream ID */
-#define SMMU_MAX_STREAMIDS (PAGE_SIZE_64K - 1)
-
-/* Maximum number of context banks per SMMU */
-#define SMMU_MAX_CBS 128
-
-/* Maximum number of mapping groups per SMMU */
-#define SMMU_MAX_SMRS 128
-
-/* SMMU global address space */
-#define SMMU_GR0(smmu) ((smmu)->base)
-#define SMMU_GR1(smmu) ((smmu)->base + (smmu)->pagesize)
-
-/*
- * SMMU global address space with conditional offset to access secure aliases
of
- * non-secure registers (e.g. nsCR0: 0x400, nsGFSR: 0x448, nsGFSYNR0: 0x450)
- */
-#define SMMU_GR0_NS(smmu) \
- ((smmu)->base + \
- ((smmu->options & SMMU_OPT_SECURE_CONFIG_ACCESS) \
- ? 0x400 : 0))
-
-/* Page table bits */
-#define SMMU_PTE_PAGE (((pteval_t)3) << 0)
-#define SMMU_PTE_CONT (((pteval_t)1) << 52)
-#define SMMU_PTE_AF (((pteval_t)1) << 10)
-#define SMMU_PTE_SH_NS (((pteval_t)0) << 8)
-#define SMMU_PTE_SH_OS (((pteval_t)2) << 8)
-#define SMMU_PTE_SH_IS (((pteval_t)3) << 8)
-
-#if PAGE_SIZE == PAGE_SIZE_4K
-#define SMMU_PTE_CONT_ENTRIES 16
-#elif PAGE_SIZE == PAGE_SIZE_64K
-#define SMMU_PTE_CONT_ENTRIES 32
-#else
-#define SMMU_PTE_CONT_ENTRIES 1
-#endif
-
-#define SMMU_PTE_CONT_SIZE (PAGE_SIZE * SMMU_PTE_CONT_ENTRIES)
-#define SMMU_PTE_CONT_MASK (~(SMMU_PTE_CONT_SIZE - 1))
-#define SMMU_PTE_HWTABLE_SIZE (PTRS_PER_PTE * sizeof(pte_t))
-
-/* Stage-1 PTE */
-#define SMMU_PTE_AP_UNPRIV (((pteval_t)1) << 6)
-#define SMMU_PTE_AP_RDONLY (((pteval_t)2) << 6)
-#define SMMU_PTE_ATTRINDX_SHIFT 2
-#define SMMU_PTE_nG (((pteval_t)1) << 11)
-
-/* Stage-2 PTE */
-#define SMMU_PTE_HAP_FAULT (((pteval_t)0) << 6)
-#define SMMU_PTE_HAP_READ (((pteval_t)1) << 6)
-#define SMMU_PTE_HAP_WRITE (((pteval_t)2) << 6)
-#define SMMU_PTE_MEMATTR_OIWB (((pteval_t)0xf) << 2)
-#define SMMU_PTE_MEMATTR_NC (((pteval_t)0x5) << 2)
-#define SMMU_PTE_MEMATTR_DEV (((pteval_t)0x1) << 2)
-
-/* Configuration registers */
-#define SMMU_GR0_sCR0 0x0
-#define SMMU_sCR0_CLIENTPD (1 << 0)
-#define SMMU_sCR0_GFRE (1 << 1)
-#define SMMU_sCR0_GFIE (1 << 2)
-#define SMMU_sCR0_GCFGFRE (1 << 4)
-#define SMMU_sCR0_GCFGFIE (1 << 5)
-#define SMMU_sCR0_USFCFG (1 << 10)
-#define SMMU_sCR0_VMIDPNE (1 << 11)
-#define SMMU_sCR0_PTM (1 << 12)
-#define SMMU_sCR0_FB (1 << 13)
-#define SMMU_sCR0_BSU_SHIFT 14
-#define SMMU_sCR0_BSU_MASK 0x3
-
-/* Identification registers */
-#define SMMU_GR0_ID0 0x20
-#define SMMU_GR0_ID1 0x24
-#define SMMU_GR0_ID2 0x28
-#define SMMU_GR0_ID3 0x2c
-#define SMMU_GR0_ID4 0x30
-#define SMMU_GR0_ID5 0x34
-#define SMMU_GR0_ID6 0x38
-#define SMMU_GR0_ID7 0x3c
-#define SMMU_GR0_sGFSR 0x48
-#define SMMU_GR0_sGFSYNR0 0x50
-#define SMMU_GR0_sGFSYNR1 0x54
-#define SMMU_GR0_sGFSYNR2 0x58
-#define SMMU_GR0_PIDR0 0xfe0
-#define SMMU_GR0_PIDR1 0xfe4
-#define SMMU_GR0_PIDR2 0xfe8
-
-#define SMMU_ID0_S1TS (1 << 30)
-#define SMMU_ID0_S2TS (1 << 29)
-#define SMMU_ID0_NTS (1 << 28)
-#define SMMU_ID0_SMS (1 << 27)
-#define SMMU_ID0_PTFS_SHIFT 24
-#define SMMU_ID0_PTFS_MASK 0x2
-#define SMMU_ID0_PTFS_V8_ONLY 0x2
-#define SMMU_ID0_CTTW (1 << 14)
-#define SMMU_ID0_NUMIRPT_SHIFT 16
-#define SMMU_ID0_NUMIRPT_MASK 0xff
-#define SMMU_ID0_NUMSMRG_SHIFT 0
-#define SMMU_ID0_NUMSMRG_MASK 0xff
-
-#define SMMU_ID1_PAGESIZE (1 << 31)
-#define SMMU_ID1_NUMPAGENDXB_SHIFT 28
-#define SMMU_ID1_NUMPAGENDXB_MASK 7
-#define SMMU_ID1_NUMS2CB_SHIFT 16
-#define SMMU_ID1_NUMS2CB_MASK 0xff
-#define SMMU_ID1_NUMCB_SHIFT 0
-#define SMMU_ID1_NUMCB_MASK 0xff
-
-#define SMMU_ID2_OAS_SHIFT 4
-#define SMMU_ID2_OAS_MASK 0xf
-#define SMMU_ID2_IAS_SHIFT 0
-#define SMMU_ID2_IAS_MASK 0xf
-#define SMMU_ID2_UBS_SHIFT 8
-#define SMMU_ID2_UBS_MASK 0xf
-#define SMMU_ID2_PTFS_4K (1 << 12)
-#define SMMU_ID2_PTFS_16K (1 << 13)
-#define SMMU_ID2_PTFS_64K (1 << 14)
-
-#define SMMU_PIDR2_ARCH_SHIFT 4
-#define SMMU_PIDR2_ARCH_MASK 0xf
-
-/* Global TLB invalidation */
-#define SMMU_GR0_STLBIALL 0x60
-#define SMMU_GR0_TLBIVMID 0x64
-#define SMMU_GR0_TLBIALLNSNH 0x68
-#define SMMU_GR0_TLBIALLH 0x6c
-#define SMMU_GR0_sTLBGSYNC 0x70
-#define SMMU_GR0_sTLBGSTATUS 0x74
-#define SMMU_sTLBGSTATUS_GSACTIVE (1 << 0)
-#define SMMU_TLB_LOOP_TIMEOUT 1000000 /* 1s! */
-
-/* Stream mapping registers */
-#define SMMU_GR0_SMR(n) (0x800 + ((n) << 2))
-#define SMMU_SMR_VALID (1 << 31)
-#define SMMU_SMR_MASK_SHIFT 16
-#define SMMU_SMR_MASK_MASK 0x7fff
-#define SMMU_SMR_ID_SHIFT 0
-#define SMMU_SMR_ID_MASK 0x7fff
-
-#define SMMU_GR0_S2CR(n) (0xc00 + ((n) << 2))
-#define SMMU_S2CR_CBNDX_SHIFT 0
-#define SMMU_S2CR_CBNDX_MASK 0xff
-#define SMMU_S2CR_TYPE_SHIFT 16
-#define SMMU_S2CR_TYPE_MASK 0x3
-#define SMMU_S2CR_TYPE_TRANS (0 << SMMU_S2CR_TYPE_SHIFT)
-#define SMMU_S2CR_TYPE_BYPASS (1 << SMMU_S2CR_TYPE_SHIFT)
-#define SMMU_S2CR_TYPE_FAULT (2 << SMMU_S2CR_TYPE_SHIFT)
-
-/* Context bank attribute registers */
-#define SMMU_GR1_CBAR(n) (0x0 + ((n) << 2))
-#define SMMU_CBAR_VMID_SHIFT 0
-#define SMMU_CBAR_VMID_MASK 0xff
-#define SMMU_CBAR_S1_MEMATTR_SHIFT 12
-#define SMMU_CBAR_S1_MEMATTR_MASK 0xf
-#define SMMU_CBAR_S1_MEMATTR_WB 0xf
-#define SMMU_CBAR_TYPE_SHIFT 16
-#define SMMU_CBAR_TYPE_MASK 0x3
-#define SMMU_CBAR_TYPE_S2_TRANS (0 << SMMU_CBAR_TYPE_SHIFT)
-#define SMMU_CBAR_TYPE_S1_TRANS_S2_BYPASS (1 << SMMU_CBAR_TYPE_SHIFT)
-#define SMMU_CBAR_TYPE_S1_TRANS_S2_FAULT (2 << SMMU_CBAR_TYPE_SHIFT)
-#define SMMU_CBAR_TYPE_S1_TRANS_S2_TRANS (3 << SMMU_CBAR_TYPE_SHIFT)
-#define SMMU_CBAR_IRPTNDX_SHIFT 24
-#define SMMU_CBAR_IRPTNDX_MASK 0xff
-
-#define SMMU_GR1_CBA2R(n) (0x800 + ((n) << 2))
-#define SMMU_CBA2R_RW64_32BIT (0 << 0)
-#define SMMU_CBA2R_RW64_64BIT (1 << 0)
-
-/* Translation context bank */
-#define SMMU_CB_BASE(smmu) ((smmu)->base + ((smmu)->size >>
1))
-#define SMMU_CB(smmu, n) ((n) * (smmu)->pagesize)
-
-#define SMMU_CB_SCTLR 0x0
-#define SMMU_CB_RESUME 0x8
-#define SMMU_CB_TCR2 0x10
-#define SMMU_CB_TTBR0_LO 0x20
-#define SMMU_CB_TTBR0_HI 0x24
-#define SMMU_CB_TCR 0x30
-#define SMMU_CB_S1_MAIR0 0x38
-#define SMMU_CB_FSR 0x58
-#define SMMU_CB_FAR_LO 0x60
-#define SMMU_CB_FAR_HI 0x64
-#define SMMU_CB_FSYNR0 0x68
-#define SMMU_CB_S1_TLBIASID 0x610
-
-#define SMMU_SCTLR_S1_ASIDPNE (1 << 12)
-#define SMMU_SCTLR_CFCFG (1 << 7)
-#define SMMU_SCTLR_CFIE (1 << 6)
-#define SMMU_SCTLR_CFRE (1 << 5)
-#define SMMU_SCTLR_E (1 << 4)
-#define SMMU_SCTLR_AFE (1 << 2)
-#define SMMU_SCTLR_TRE (1 << 1)
-#define SMMU_SCTLR_M (1 << 0)
-#define SMMU_SCTLR_EAE_SBOP (SMMU_SCTLR_AFE | SMMU_SCTLR_TRE)
-
-#define SMMU_RESUME_RETRY (0 << 0)
-#define SMMU_RESUME_TERMINATE (1 << 0)
-
-#define SMMU_TCR_EAE (1 << 31)
-
-#define SMMU_TCR_PASIZE_SHIFT 16
-#define SMMU_TCR_PASIZE_MASK 0x7
-
-#define SMMU_TCR_TG0_4K (0 << 14)
-#define SMMU_TCR_TG0_64K (1 << 14)
-
-#define SMMU_TCR_SH0_SHIFT 12
-#define SMMU_TCR_SH0_MASK 0x3
-#define SMMU_TCR_SH_NS 0
-#define SMMU_TCR_SH_OS 2
-#define SMMU_TCR_SH_IS 3
-
-#define SMMU_TCR_ORGN0_SHIFT 10
-#define SMMU_TCR_IRGN0_SHIFT 8
-#define SMMU_TCR_RGN_MASK 0x3
-#define SMMU_TCR_RGN_NC 0
-#define SMMU_TCR_RGN_WBWA 1
-#define SMMU_TCR_RGN_WT 2
-#define SMMU_TCR_RGN_WB 3
-
-#define SMMU_TCR_SL0_SHIFT 6
-#define SMMU_TCR_SL0_MASK 0x3
-#define SMMU_TCR_SL0_LVL_2 0
-#define SMMU_TCR_SL0_LVL_1 1
-
-#define SMMU_TCR_T1SZ_SHIFT 16
-#define SMMU_TCR_T0SZ_SHIFT 0
-#define SMMU_TCR_SZ_MASK 0xf
-
-#define SMMU_TCR2_SEP_SHIFT 15
-#define SMMU_TCR2_SEP_MASK 0x7
-
-#define SMMU_TCR2_PASIZE_SHIFT 0
-#define SMMU_TCR2_PASIZE_MASK 0x7
-
-/* Common definitions for PASize and SEP fields */
-#define SMMU_TCR2_ADDR_32 0
-#define SMMU_TCR2_ADDR_36 1
-#define SMMU_TCR2_ADDR_40 2
-#define SMMU_TCR2_ADDR_42 3
-#define SMMU_TCR2_ADDR_44 4
-#define SMMU_TCR2_ADDR_48 5
-
-#define SMMU_TTBRn_HI_ASID_SHIFT 16
-
-#define SMMU_MAIR_ATTR_SHIFT(n) ((n) << 3)
-#define SMMU_MAIR_ATTR_MASK 0xff
-#define SMMU_MAIR_ATTR_DEVICE 0x04
-#define SMMU_MAIR_ATTR_NC 0x44
-#define SMMU_MAIR_ATTR_WBRWA 0xff
-#define SMMU_MAIR_ATTR_IDX_NC 0
-#define SMMU_MAIR_ATTR_IDX_CACHE 1
-#define SMMU_MAIR_ATTR_IDX_DEV 2
-
-#define SMMU_FSR_MULTI (1 << 31)
-#define SMMU_FSR_SS (1 << 30)
-#define SMMU_FSR_UUT (1 << 8)
-#define SMMU_FSR_ASF (1 << 7)
-#define SMMU_FSR_TLBLKF (1 << 6)
-#define SMMU_FSR_TLBMCF (1 << 5)
-#define SMMU_FSR_EF (1 << 4)
-#define SMMU_FSR_PF (1 << 3)
-#define SMMU_FSR_AFF (1 << 2)
-#define SMMU_FSR_TF (1 << 1)
-
-#define SMMU_FSR_IGN (SMMU_FSR_AFF | SMMU_FSR_ASF | \
- SMMU_FSR_TLBMCF | SMMU_FSR_TLBLKF)
-#define SMMU_FSR_FAULT (SMMU_FSR_MULTI | SMMU_FSR_SS | \
- SMMU_FSR_UUT | SMMU_FSR_EF | \
- SMMU_FSR_PF | SMMU_FSR_TF | \
- SMMU_FSR_IGN)
-
-#define SMMU_FSYNR0_WNR (1 << 4)
-
-#define smmu_print(dev, lvl, fmt, ...) \
- printk(lvl "smmu: %s: " fmt, dt_node_full_name(dev->node), ## __VA_ARGS__)
-
-#define smmu_err(dev, fmt, ...) smmu_print(dev, XENLOG_ERR, fmt, ##
__VA_ARGS__)
-
-#define smmu_dbg(dev, fmt, ...) \
- smmu_print(dev, XENLOG_DEBUG, fmt, ## __VA_ARGS__)
-
-#define smmu_info(dev, fmt, ...) \
- smmu_print(dev, XENLOG_INFO, fmt, ## __VA_ARGS__)
-
-#define smmu_warn(dev, fmt, ...) \
- smmu_print(dev, XENLOG_WARNING, fmt, ## __VA_ARGS__)
-
-struct arm_smmu_device {
- const struct dt_device_node *node;
-
- void __iomem *base;
- unsigned long size;
- unsigned long pagesize;
-
-#define SMMU_FEAT_COHERENT_WALK (1 << 0)
-#define SMMU_FEAT_STREAM_MATCH (1 << 1)
-#define SMMU_FEAT_TRANS_S1 (1 << 2)
-#define SMMU_FEAT_TRANS_S2 (1 << 3)
-#define SMMU_FEAT_TRANS_NESTED (1 << 4)
- u32 features;
- u32 options;
- int version;
-
- u32 num_context_banks;
- u32 num_s2_context_banks;
- DECLARE_BITMAP(context_map, SMMU_MAX_CBS);
- atomic_t irptndx;
-
- u32 num_mapping_groups;
- DECLARE_BITMAP(smr_map, SMMU_MAX_SMRS);
-
- unsigned long input_size;
- unsigned long s1_output_size;
- unsigned long s2_output_size;
-
- u32 num_global_irqs;
- u32 num_context_irqs;
- unsigned int *irqs;
-
- u32 smr_mask_mask;
- u32 smr_id_mask;
-
- unsigned long *sids;
-
- struct list_head list;
- struct rb_root masters;
-};
-
-struct arm_smmu_smr {
- u8 idx;
- u16 mask;
- u16 id;
-};
-
-#define INVALID_IRPTNDX 0xff
-
-#define SMMU_CB_ASID(cfg) ((cfg)->cbndx)
-#define SMMU_CB_VMID(cfg) ((cfg)->cbndx + 1)
-
-struct arm_smmu_domain_cfg {
- struct arm_smmu_device *smmu;
- u8 cbndx;
- u8 irptndx;
- u32 cbar;
- /* Domain associated to this device */
- struct domain *domain;
- /* List of master which use this structure */
- struct list_head masters;
-
- /* Used to link domain context for a same domain */
- struct list_head list;
-};
-
-struct arm_smmu_master {
- const struct dt_device_node *dt_node;
-
- /*
- * The following is specific to the master's position in the
- * SMMU chain.
- */
- struct rb_node node;
- u32 num_streamids;
- u16 streamids[MAX_MASTER_STREAMIDS];
- int num_s2crs;
-
- struct arm_smmu_smr *smrs;
- struct arm_smmu_domain_cfg *cfg;
-
- /* Used to link masters in a same domain context */
- struct list_head list;
-};
-
-static LIST_HEAD(arm_smmu_devices);
-
-struct arm_smmu_domain {
- spinlock_t lock;
- struct list_head contexts;
-};
-
-struct arm_smmu_option_prop {
- u32 opt;
- const char *prop;
-};
-
-static const struct arm_smmu_option_prop arm_smmu_options [] __initconst =
-{
- { SMMU_OPT_SECURE_CONFIG_ACCESS, "calxeda,smmu-secure-config-access" },
- { 0, NULL},
-};
-
-static void __init check_driver_options(struct arm_smmu_device *smmu)
-{
- int i = 0;
-
- do {
- if ( dt_property_read_bool(smmu->node, arm_smmu_options[i].prop) )
- {
- smmu->options |= arm_smmu_options[i].opt;
- smmu_dbg(smmu, "option %s\n", arm_smmu_options[i].prop);
- }
- } while ( arm_smmu_options[++i].opt );
-}
-
-static void arm_smmu_context_fault(int irq, void *data,
- struct cpu_user_regs *regs)
-{
- u32 fsr, far, fsynr;
- uint64_t iova;
- struct arm_smmu_domain_cfg *cfg = data;
- struct arm_smmu_device *smmu = cfg->smmu;
- void __iomem *cb_base;
-
- cb_base = SMMU_CB_BASE(smmu) + SMMU_CB(smmu, cfg->cbndx);
- fsr = readl_relaxed(cb_base + SMMU_CB_FSR);
-
- if ( !(fsr & SMMU_FSR_FAULT) )
- return;
-
- if ( fsr & SMMU_FSR_IGN )
- smmu_err(smmu, "Unexpected context fault (fsr 0x%u)\n", fsr);
-
- fsynr = readl_relaxed(cb_base + SMMU_CB_FSYNR0);
- far = readl_relaxed(cb_base + SMMU_CB_FAR_LO);
- iova = far;
- far = readl_relaxed(cb_base + SMMU_CB_FAR_HI);
- iova |= ((uint64_t)far << 32);
-
- smmu_err(smmu, "Unhandled context fault for domain %u\n",
- cfg->domain->domain_id);
- smmu_err(smmu, "\tFSR 0x%x, IOVA 0x%"PRIx64", FSYNR 0x%x, CB %d\n",
- fsr, iova, fsynr, cfg->cbndx);
-
- /* Clear the faulting FSR */
- writel(fsr, cb_base + SMMU_CB_FSR);
-
- /* Terminate any stalled transactions */
- if ( fsr & SMMU_FSR_SS )
- writel_relaxed(SMMU_RESUME_TERMINATE, cb_base + SMMU_CB_RESUME);
-}
-
-static void arm_smmu_global_fault(int irq, void *data,
- struct cpu_user_regs *regs)
-{
- u32 gfsr, gfsynr0, gfsynr1, gfsynr2;
- struct arm_smmu_device *smmu = data;
- void __iomem *gr0_base = SMMU_GR0_NS(smmu);
-
- gfsr = readl_relaxed(gr0_base + SMMU_GR0_sGFSR);
- gfsynr0 = readl_relaxed(gr0_base + SMMU_GR0_sGFSYNR0);
- gfsynr1 = readl_relaxed(gr0_base + SMMU_GR0_sGFSYNR1);
- gfsynr2 = readl_relaxed(gr0_base + SMMU_GR0_sGFSYNR2);
-
- if ( !gfsr )
- return;
-
- smmu_err(smmu, "Unexpected global fault, this could be serious\n");
- smmu_err(smmu,
- "\tGFSR 0x%08x, GFSYNR0 0x%08x, GFSYNR1 0x%08x, GFSYNR2 0x%08x\n",
- gfsr, gfsynr0, gfsynr1, gfsynr2);
- writel(gfsr, gr0_base + SMMU_GR0_sGFSR);
-}
-
-static struct arm_smmu_master *
-find_smmu_master(struct arm_smmu_device *smmu,
- const struct dt_device_node *dev_node)
-{
- struct rb_node *node = smmu->masters.rb_node;
-
- while ( node )
- {
- struct arm_smmu_master *master;
-
- master = container_of(node, struct arm_smmu_master, node);
-
- if ( dev_node < master->dt_node )
- node = node->rb_left;
- else if ( dev_node > master->dt_node )
- node = node->rb_right;
- else
- return master;
- }
-
- return NULL;
-}
-
-static __init int insert_smmu_master(struct arm_smmu_device *smmu,
- struct arm_smmu_master *master)
-{
- struct rb_node **new, *parent;
-
- new = &smmu->masters.rb_node;
- parent = NULL;
- while ( *new )
- {
- struct arm_smmu_master *this;
-
- this = container_of(*new, struct arm_smmu_master, node);
-
- parent = *new;
- if ( master->dt_node < this->dt_node )
- new = &((*new)->rb_left);
- else if (master->dt_node > this->dt_node)
- new = &((*new)->rb_right);
- else
- return -EEXIST;
- }
-
- rb_link_node(&master->node, parent, new);
- rb_insert_color(&master->node, &smmu->masters);
- return 0;
-}
-
-static __init int register_smmu_master(struct arm_smmu_device *smmu,
- struct dt_phandle_args *masterspec)
-{
- int i, sid;
- struct arm_smmu_master *master;
- int rc = 0;
-
- smmu_dbg(smmu, "Try to add master %s\n", masterspec->np->name);
-
- master = find_smmu_master(smmu, masterspec->np);
- if ( master )
- {
- smmu_err(smmu,
- "rejecting multiple registrations for master device %s\n",
- masterspec->np->name);
- return -EBUSY;
- }
-
- if ( masterspec->args_count > MAX_MASTER_STREAMIDS )
- {
- smmu_err(smmu,
- "reached maximum number (%d) of stream IDs for master device %s\n",
- MAX_MASTER_STREAMIDS, masterspec->np->name);
- return -ENOSPC;
- }
-
- master = xzalloc(struct arm_smmu_master);
- if ( !master )
- return -ENOMEM;
-
- INIT_LIST_HEAD(&master->list);
- master->dt_node = masterspec->np;
- master->num_streamids = masterspec->args_count;
-
- dt_device_set_protected(masterspec->np);
-
- for ( i = 0; i < master->num_streamids; ++i )
- {
- sid = masterspec->args[i];
- if ( test_and_set_bit(sid, smmu->sids) )
- {
- smmu_err(smmu, "duplicate stream ID (%d)\n", sid);
- xfree(master);
- return -EEXIST;
- }
- master->streamids[i] = masterspec->args[i];
- }
-
- rc = insert_smmu_master(smmu, master);
- /* Insertion should never fail */
- ASSERT(rc == 0);
-
- return 0;
-}
-
-static int __arm_smmu_alloc_bitmap(unsigned long *map, int start, int end)
-{
- int idx;
-
- do
- {
- idx = find_next_zero_bit(map, end, start);
- if ( idx == end )
- return -ENOSPC;
- } while ( test_and_set_bit(idx, map) );
-
- return idx;
-}
-
-static void __arm_smmu_free_bitmap(unsigned long *map, int idx)
-{
- clear_bit(idx, map);
-}
-
-static void arm_smmu_tlb_sync(struct arm_smmu_device *smmu)
-{
- int count = 0;
- void __iomem *gr0_base = SMMU_GR0(smmu);
-
- writel_relaxed(0, gr0_base + SMMU_GR0_sTLBGSYNC);
- while ( readl_relaxed(gr0_base + SMMU_GR0_sTLBGSTATUS) &
- SMMU_sTLBGSTATUS_GSACTIVE )
- {
- cpu_relax();
- if ( ++count == SMMU_TLB_LOOP_TIMEOUT )
- {
- smmu_err(smmu, "TLB sync timed out -- SMMU may be deadlocked\n");
- return;
- }
- udelay(1);
- }
-}
-
-static void arm_smmu_tlb_inv_context(struct arm_smmu_domain_cfg *cfg)
-{
- struct arm_smmu_device *smmu = cfg->smmu;
- void __iomem *base = SMMU_GR0(smmu);
-
- writel_relaxed(SMMU_CB_VMID(cfg),
- base + SMMU_GR0_TLBIVMID);
-
- arm_smmu_tlb_sync(smmu);
-}
-
-static void arm_smmu_iotlb_flush_all(struct domain *d)
-{
- struct arm_smmu_domain *smmu_domain = domain_hvm_iommu(d)->arch.priv;
- struct arm_smmu_domain_cfg *cfg;
-
- spin_lock(&smmu_domain->lock);
- list_for_each_entry(cfg, &smmu_domain->contexts, list)
- arm_smmu_tlb_inv_context(cfg);
- spin_unlock(&smmu_domain->lock);
-}
-
-static void arm_smmu_iotlb_flush(struct domain *d, unsigned long gfn,
- unsigned int page_count)
-{
- /* ARM SMMU v1 doesn't have flush by VMA and VMID */
- arm_smmu_iotlb_flush_all(d);
-}
-
-static int determine_smr_mask(struct arm_smmu_device *smmu,
- struct arm_smmu_master *master,
- struct arm_smmu_smr *smr, int start, int order)
-{
- u16 i, zero_bits_mask, one_bits_mask, const_mask;
- int nr;
-
- nr = 1 << order;
-
- if ( nr == 1 )
- {
- /* no mask, use streamid to match and be done with it */
- smr->mask = 0;
- smr->id = master->streamids[start];
- return 0;
- }
-
- zero_bits_mask = 0;
- one_bits_mask = 0xffff;
- for ( i = start; i < start + nr; i++)
- {
- zero_bits_mask |= master->streamids[i]; /* const 0 bits */
- one_bits_mask &= master->streamids[i]; /* const 1 bits */
- }
- zero_bits_mask = ~zero_bits_mask;
-
- /* bits having constant values (either 0 or 1) */
- const_mask = zero_bits_mask | one_bits_mask;
-
- i = hweight16(~const_mask);
- if ( (1 << i) == nr )
- {
- smr->mask = ~const_mask;
- smr->id = one_bits_mask;
- }
- else
- /* no usable mask for this set of streamids */
- return 1;
-
- if ( ((smr->mask & smmu->smr_mask_mask) != smr->mask) ||
- ((smr->id & smmu->smr_id_mask) != smr->id) )
- /* insufficient number of mask/id bits */
- return 1;
-
- return 0;
-}
-
-static int determine_smr_mapping(struct arm_smmu_device *smmu,
- struct arm_smmu_master *master,
- struct arm_smmu_smr *smrs, int max_smrs)
-{
- int nr_sid, nr, i, bit, start;
-
- /*
- * This function is called only once -- when a master is added
- * to a domain. If master->num_s2crs != 0 then this master
- * was already added to a domain.
- */
- BUG_ON(master->num_s2crs);
-
- start = nr = 0;
- nr_sid = master->num_streamids;
- do
- {
- /*
- * largest power-of-2 number of streamids for which to
- * determine a usable mask/id pair for stream matching
- */
- bit = fls(nr_sid);
- if (!bit)
- return 0;
-
- /*
- * iterate over power-of-2 numbers to determine
- * largest possible mask/id pair for stream matching
- * of next 2**i streamids
- */
- for ( i = bit - 1; i >= 0; i-- )
- {
- if( !determine_smr_mask(smmu, master,
- &smrs[master->num_s2crs],
- start, i))
- break;
- }
-
- if ( i < 0 )
- goto out;
-
- nr = 1 << i;
- nr_sid -= nr;
- start += nr;
- master->num_s2crs++;
- } while ( master->num_s2crs <= max_smrs );
-
-out:
- if ( nr_sid )
- {
- /* not enough mapping groups available */
- master->num_s2crs = 0;
- return -ENOSPC;
- }
-
- return 0;
-}
-
-static int arm_smmu_master_configure_smrs(struct arm_smmu_device *smmu,
- struct arm_smmu_master *master)
-{
- int i, max_smrs, ret;
- struct arm_smmu_smr *smrs;
- void __iomem *gr0_base = SMMU_GR0(smmu);
-
- if ( !(smmu->features & SMMU_FEAT_STREAM_MATCH) )
- return 0;
-
- if ( master->smrs )
- return -EEXIST;
-
- max_smrs = min(smmu->num_mapping_groups, master->num_streamids);
- smrs = xmalloc_array(struct arm_smmu_smr, max_smrs);
- if ( !smrs )
- {
- smmu_err(smmu, "failed to allocated %d SMRs for master %s\n",
- max_smrs, dt_node_name(master->dt_node));
- return -ENOMEM;
- }
-
- ret = determine_smr_mapping(smmu, master, smrs, max_smrs);
- if ( ret )
- goto err_free_smrs;
-
- /* Allocate the SMRs on the root SMMU */
- for ( i = 0; i < master->num_s2crs; ++i )
- {
- int idx = __arm_smmu_alloc_bitmap(smmu->smr_map, 0,
- smmu->num_mapping_groups);
- if ( idx < 0 )
- {
- smmu_err(smmu, "failed to allocate free SMR\n");
- goto err_free_bitmap;
- }
- smrs[i].idx = idx;
- }
-
- /* It worked! Now, poke the actual hardware */
- for ( i = 0; i < master->num_s2crs; ++i )
- {
- u32 reg = SMMU_SMR_VALID | smrs[i].id << SMMU_SMR_ID_SHIFT |
- smrs[i].mask << SMMU_SMR_MASK_SHIFT;
- smmu_dbg(smmu, "SMR%d: 0x%x\n", smrs[i].idx, reg);
- writel_relaxed(reg, gr0_base + SMMU_GR0_SMR(smrs[i].idx));
- }
-
- master->smrs = smrs;
- return 0;
-
-err_free_bitmap:
- while (--i >= 0)
- __arm_smmu_free_bitmap(smmu->smr_map, smrs[i].idx);
- master->num_s2crs = 0;
-err_free_smrs:
- xfree(smrs);
- return -ENOSPC;
-}
-
-/* Forward declaration */
-static void arm_smmu_destroy_domain_context(struct arm_smmu_domain_cfg *cfg);
-
-static int arm_smmu_domain_add_master(struct domain *d,
- struct arm_smmu_domain_cfg *cfg,
- struct arm_smmu_master *master)
-{
- int i, ret;
- struct arm_smmu_device *smmu = cfg->smmu;
- void __iomem *gr0_base = SMMU_GR0(smmu);
- struct arm_smmu_smr *smrs = master->smrs;
-
- if ( master->cfg )
- return -EBUSY;
-
- ret = arm_smmu_master_configure_smrs(smmu, master);
- if ( ret )
- return ret;
-
- /* Now we're at the root, time to point at our context bank */
- if ( !master->num_s2crs )
- master->num_s2crs = master->num_streamids;
-
- for ( i = 0; i < master->num_s2crs; ++i )
- {
- u32 idx, s2cr;
-
- idx = smrs ? smrs[i].idx : master->streamids[i];
- s2cr = (SMMU_S2CR_TYPE_TRANS << SMMU_S2CR_TYPE_SHIFT) |
- (cfg->cbndx << SMMU_S2CR_CBNDX_SHIFT);
- smmu_dbg(smmu, "S2CR%d: 0x%x\n", idx, s2cr);
- writel_relaxed(s2cr, gr0_base + SMMU_GR0_S2CR(idx));
- }
-
- master->cfg = cfg;
- list_add(&master->list, &cfg->masters);
-
- return 0;
-}
-
-static void arm_smmu_domain_remove_master(struct arm_smmu_master *master)
-{
- int i;
- struct arm_smmu_domain_cfg *cfg = master->cfg;
- struct arm_smmu_device *smmu = cfg->smmu;
- void __iomem *gr0_base = SMMU_GR0(smmu);
- struct arm_smmu_smr *smrs = master->smrs;
-
- /*
- * We *must* clear the S2CR first, because freeing the SMR means
- * that it can be reallocated immediately
- */
- for ( i = 0; i < master->num_streamids; ++i )
- {
- u16 sid = master->streamids[i];
- writel_relaxed(SMMU_S2CR_TYPE_FAULT,
- gr0_base + SMMU_GR0_S2CR(sid));
- }
-
- /* Invalidate the SMRs before freeing back to the allocator */
- for (i = 0; i < master->num_s2crs; ++i) {
- u8 idx = smrs[i].idx;
- writel_relaxed(~SMMU_SMR_VALID, gr0_base + SMMU_GR0_SMR(idx));
- __arm_smmu_free_bitmap(smmu->smr_map, idx);
- }
-
- master->smrs = NULL;
- master->num_s2crs = 0;
- xfree(smrs);
-
- master->cfg = NULL;
- list_del(&master->list);
- INIT_LIST_HEAD(&master->list);
-}
-
-static void arm_smmu_init_context_bank(struct arm_smmu_domain_cfg *cfg)
-{
- u32 reg;
- struct arm_smmu_device *smmu = cfg->smmu;
- void __iomem *cb_base, *gr1_base;
- paddr_t p2maddr;
-
- ASSERT(cfg->domain != NULL);
- p2maddr = page_to_maddr(cfg->domain->arch.p2m.root);
-
- gr1_base = SMMU_GR1(smmu);
- cb_base = SMMU_CB_BASE(smmu) + SMMU_CB(smmu, cfg->cbndx);
-
- /* CBAR */
- reg = cfg->cbar;
- if ( smmu->version == 1 )
- reg |= cfg->irptndx << SMMU_CBAR_IRPTNDX_SHIFT;
-
- reg |= SMMU_CB_VMID(cfg) << SMMU_CBAR_VMID_SHIFT;
- writel_relaxed(reg, gr1_base + SMMU_GR1_CBAR(cfg->cbndx));
-
- if ( smmu->version > 1 )
- {
- /* CBA2R */
-#ifdef CONFIG_ARM_64
- reg = SMMU_CBA2R_RW64_64BIT;
-#else
- reg = SMMU_CBA2R_RW64_32BIT;
-#endif
- writel_relaxed(reg, gr1_base + SMMU_GR1_CBA2R(cfg->cbndx));
- }
-
- /* TTBR0 */
- reg = (p2maddr & ((1ULL << 32) - 1));
- writel_relaxed(reg, cb_base + SMMU_CB_TTBR0_LO);
- reg = (p2maddr >> 32);
- writel_relaxed(reg, cb_base + SMMU_CB_TTBR0_HI);
-
- /*
- * TCR
- * We use long descriptor, with inner-shareable WBWA tables in TTBR0.
- */
- if ( smmu->version > 1 )
- {
- /* 4K Page Table */
- if ( PAGE_SIZE == PAGE_SIZE_4K )
- reg = SMMU_TCR_TG0_4K;
- else
- reg = SMMU_TCR_TG0_64K;
-
- switch ( smmu->s2_output_size ) {
- case 32:
- reg |= (SMMU_TCR2_ADDR_32 << SMMU_TCR_PASIZE_SHIFT);
- break;
- case 36:
- reg |= (SMMU_TCR2_ADDR_36 << SMMU_TCR_PASIZE_SHIFT);
- break;
- case 40:
- reg |= (SMMU_TCR2_ADDR_40 << SMMU_TCR_PASIZE_SHIFT);
- break;
- case 42:
- reg |= (SMMU_TCR2_ADDR_42 << SMMU_TCR_PASIZE_SHIFT);
- break;
- case 44:
- reg |= (SMMU_TCR2_ADDR_44 << SMMU_TCR_PASIZE_SHIFT);
- break;
- case 48:
- reg |= (SMMU_TCR2_ADDR_48 << SMMU_TCR_PASIZE_SHIFT);
- break;
- }
- }
- else
- reg = 0;
-
- /* The attribute to walk the page table should be the same as VTCR_EL2 */
- reg |= SMMU_TCR_EAE |
- (SMMU_TCR_SH_IS << SMMU_TCR_SH0_SHIFT) |
- (SMMU_TCR_RGN_WBWA << SMMU_TCR_ORGN0_SHIFT) |
- (SMMU_TCR_RGN_WBWA << SMMU_TCR_IRGN0_SHIFT) |
- (SMMU_TCR_SL0_LVL_1 << SMMU_TCR_SL0_SHIFT) |
- /* T0SZ=(1)100 = -8 ( 32 -(-8) = 40 bit physical addresses ) */
- (0x18 << SMMU_TCR_T0SZ_SHIFT);
- writel_relaxed(reg, cb_base + SMMU_CB_TCR);
-
- /* SCTLR */
- reg = SMMU_SCTLR_CFCFG |
- SMMU_SCTLR_CFIE |
- SMMU_SCTLR_CFRE |
- SMMU_SCTLR_M |
- SMMU_SCTLR_EAE_SBOP;
-
- writel_relaxed(reg, cb_base + SMMU_CB_SCTLR);
-}
-
-static struct arm_smmu_domain_cfg *
-arm_smmu_alloc_domain_context(struct domain *d,
- struct arm_smmu_device *smmu)
-{
- unsigned int irq;
- int ret, start;
- struct arm_smmu_domain_cfg *cfg;
- struct arm_smmu_domain *smmu_domain = domain_hvm_iommu(d)->arch.priv;
-
- ASSERT(spin_is_locked(&smmu_domain->lock));
-
- cfg = xzalloc(struct arm_smmu_domain_cfg);
- if ( !cfg )
- return NULL;
-
- /* Master already initialized to another domain ... */
- if ( cfg->domain != NULL )
- goto out_free_mem;
-
- cfg->cbar = SMMU_CBAR_TYPE_S2_TRANS;
- start = 0;
-
- ret = __arm_smmu_alloc_bitmap(smmu->context_map, start,
- smmu->num_context_banks);
- if ( ret < 0 )
- goto out_free_mem;
-
- cfg->cbndx = ret;
- if ( smmu->version == 1 )
- {
- cfg->irptndx = atomic_inc_return(&smmu->irptndx);
- cfg->irptndx %= smmu->num_context_irqs;
- }
- else
- cfg->irptndx = cfg->cbndx;
-
- irq = smmu->irqs[smmu->num_global_irqs + cfg->irptndx];
- ret = request_irq(irq, IRQF_SHARED, arm_smmu_context_fault,
- "arm-smmu-context-fault", cfg);
- if ( ret )
- {
- smmu_err(smmu, "failed to request context IRQ %d (%u)\n",
- cfg->irptndx, irq);
- cfg->irptndx = INVALID_IRPTNDX;
- goto out_free_context;
- }
-
- cfg->domain = d;
- cfg->smmu = smmu;
- if ( smmu->features & SMMU_FEAT_COHERENT_WALK )
- iommu_set_feature(d, IOMMU_FEAT_COHERENT_WALK);
-
- arm_smmu_init_context_bank(cfg);
- list_add(&cfg->list, &smmu_domain->contexts);
- INIT_LIST_HEAD(&cfg->masters);
-
- return cfg;
-
-out_free_context:
- __arm_smmu_free_bitmap(smmu->context_map, cfg->cbndx);
-out_free_mem:
- xfree(cfg);
-
- return NULL;
-}
-
-static void arm_smmu_destroy_domain_context(struct arm_smmu_domain_cfg *cfg)
-{
- struct domain *d = cfg->domain;
- struct arm_smmu_domain *smmu_domain = domain_hvm_iommu(d)->arch.priv;
- struct arm_smmu_device *smmu = cfg->smmu;
- void __iomem *cb_base;
- unsigned int irq;
-
- ASSERT(spin_is_locked(&smmu_domain->lock));
- BUG_ON(!list_empty(&cfg->masters));
-
- /* Disable the context bank and nuke the TLB before freeing it */
- cb_base = SMMU_CB_BASE(smmu) + SMMU_CB(smmu, cfg->cbndx);
- writel_relaxed(0, cb_base + SMMU_CB_SCTLR);
- arm_smmu_tlb_inv_context(cfg);
-
- if ( cfg->irptndx != INVALID_IRPTNDX )
- {
- irq = smmu->irqs[smmu->num_global_irqs + cfg->irptndx];
- release_irq(irq, cfg);
- }
-
- __arm_smmu_free_bitmap(smmu->context_map, cfg->cbndx);
- list_del(&cfg->list);
- xfree(cfg);
-}
-
-static struct arm_smmu_device *
-arm_smmu_find_smmu_by_dev(const struct dt_device_node *dev)
-{
- struct arm_smmu_device *smmu;
- struct arm_smmu_master *master = NULL;
-
- list_for_each_entry( smmu, &arm_smmu_devices, list )
- {
- master = find_smmu_master(smmu, dev);
- if ( master )
- break;
- }
-
- if ( !master )
- return NULL;
-
- return smmu;
-}
-
-static int arm_smmu_attach_dev(struct domain *d,
- const struct dt_device_node *dev)
-{
- struct arm_smmu_device *smmu = arm_smmu_find_smmu_by_dev(dev);
- struct arm_smmu_master *master;
- struct arm_smmu_domain *smmu_domain = domain_hvm_iommu(d)->arch.priv;
- struct arm_smmu_domain_cfg *cfg = NULL;
- struct arm_smmu_domain_cfg *curr;
- int ret;
-
- printk(XENLOG_DEBUG "arm-smmu: attach %s to domain %d\n",
- dt_node_full_name(dev), d->domain_id);
-
- if ( !smmu )
- {
- printk(XENLOG_ERR "%s: cannot attach to SMMU, is it on the same
bus?\n",
- dt_node_full_name(dev));
- return -ENODEV;
- }
-
- master = find_smmu_master(smmu, dev);
- BUG_ON(master == NULL);
-
- /* Check if the device is already assigned to someone */
- if ( master->cfg )
- return -EBUSY;
-
- spin_lock(&smmu_domain->lock);
- list_for_each_entry( curr, &smmu_domain->contexts, list )
- {
- if ( curr->smmu == smmu )
- {
- cfg = curr;
- break;
- }
- }
-
- if ( !cfg )
- {
- cfg = arm_smmu_alloc_domain_context(d, smmu);
- if ( !cfg )
- {
- smmu_err(smmu, "unable to allocate context for domain %u\n",
- d->domain_id);
- spin_unlock(&smmu_domain->lock);
- return -ENOMEM;
- }
- }
- spin_unlock(&smmu_domain->lock);
-
- ret = arm_smmu_domain_add_master(d, cfg, master);
- if ( ret )
- {
- spin_lock(&smmu_domain->lock);
- if ( list_empty(&cfg->masters) )
- arm_smmu_destroy_domain_context(cfg);
- spin_unlock(&smmu_domain->lock);
- }
-
- return ret;
-}
-
-static int arm_smmu_detach_dev(struct domain *d,
- const struct dt_device_node *dev)
-{
- struct arm_smmu_domain *smmu_domain = domain_hvm_iommu(d)->arch.priv;
- struct arm_smmu_master *master;
- struct arm_smmu_device *smmu = arm_smmu_find_smmu_by_dev(dev);
- struct arm_smmu_domain_cfg *cfg;
-
- printk(XENLOG_DEBUG "arm-smmu: detach %s to domain %d\n",
- dt_node_full_name(dev), d->domain_id);
-
- if ( !smmu )
- {
- printk(XENLOG_ERR "%s: cannot find the SMMU, is it on the same bus?\n",
- dt_node_full_name(dev));
- return -ENODEV;
- }
-
- master = find_smmu_master(smmu, dev);
- BUG_ON(master == NULL);
-
- cfg = master->cfg;
-
- /* Sanity check to avoid removing a device that doesn't belong to
- * the domain
- */
- if ( !cfg || cfg->domain != d )
- {
- printk(XENLOG_ERR "%s: was not attach to domain %d\n",
- dt_node_full_name(dev), d->domain_id);
- return -ESRCH;
- }
-
- arm_smmu_domain_remove_master(master);
-
- spin_lock(&smmu_domain->lock);
- if ( list_empty(&cfg->masters) )
- arm_smmu_destroy_domain_context(cfg);
- spin_unlock(&smmu_domain->lock);
-
- return 0;
-}
-
-static int arm_smmu_reassign_dt_dev(struct domain *s, struct domain *t,
- const struct dt_device_node *dev)
-{
- int ret = 0;
-
- /* Don't allow remapping on other domain than hwdom */
- if ( t != hardware_domain )
- return -EPERM;
-
- if ( t == s )
- return 0;
-
- ret = arm_smmu_detach_dev(s, dev);
- if ( ret )
- return ret;
-
- ret = arm_smmu_attach_dev(t, dev);
-
- return ret;
-}
-
-static __init int arm_smmu_id_size_to_bits(int size)
-{
- switch ( size )
- {
- case 0:
- return 32;
- case 1:
- return 36;
- case 2:
- return 40;
- case 3:
- return 42;
- case 4:
- return 44;
- case 5:
- default:
- return 48;
- }
-}
-
-static __init int arm_smmu_device_cfg_probe(struct arm_smmu_device *smmu)
-{
- unsigned long size;
- void __iomem *gr0_base = SMMU_GR0(smmu);
- u32 id;
-
- smmu_info(smmu, "probing hardware configuration...\n");
-
- /*
- * Primecell ID
- */
- id = readl_relaxed(gr0_base + SMMU_GR0_PIDR2);
- smmu->version = ((id >> SMMU_PIDR2_ARCH_SHIFT) & SMMU_PIDR2_ARCH_MASK) + 1;
- smmu_info(smmu, "SMMUv%d with:\n", smmu->version);
-
- /* ID0 */
- id = readl_relaxed(gr0_base + SMMU_GR0_ID0);
-#ifndef CONFIG_ARM_64
- if ( ((id >> SMMU_ID0_PTFS_SHIFT) & SMMU_ID0_PTFS_MASK) ==
- SMMU_ID0_PTFS_V8_ONLY )
- {
- smmu_err(smmu, "\tno v7 descriptor support!\n");
- return -ENODEV;
- }
-#endif
- if ( id & SMMU_ID0_S1TS )
- {
- smmu->features |= SMMU_FEAT_TRANS_S1;
- smmu_info(smmu, "\tstage 1 translation\n");
- }
-
- if ( id & SMMU_ID0_S2TS )
- {
- smmu->features |= SMMU_FEAT_TRANS_S2;
- smmu_info(smmu, "\tstage 2 translation\n");
- }
-
- if ( id & SMMU_ID0_NTS )
- {
- smmu->features |= SMMU_FEAT_TRANS_NESTED;
- smmu_info(smmu, "\tnested translation\n");
- }
-
- if ( !(smmu->features &
- (SMMU_FEAT_TRANS_S1 | SMMU_FEAT_TRANS_S2 |
- SMMU_FEAT_TRANS_NESTED)) )
- {
- smmu_err(smmu, "\tno translation support!\n");
- return -ENODEV;
- }
-
- /* We need at least support for Stage 2 */
- if ( !(smmu->features & SMMU_FEAT_TRANS_S2) )
- {
- smmu_err(smmu, "\tno stage 2 translation!\n");
- return -ENODEV;
- }
-
- if ( id & SMMU_ID0_CTTW )
- {
- smmu->features |= SMMU_FEAT_COHERENT_WALK;
- smmu_info(smmu, "\tcoherent table walk\n");
- }
-
- if ( id & SMMU_ID0_SMS )
- {
- u32 smr, sid, mask;
-
- smmu->features |= SMMU_FEAT_STREAM_MATCH;
- smmu->num_mapping_groups = (id >> SMMU_ID0_NUMSMRG_SHIFT) &
- SMMU_ID0_NUMSMRG_MASK;
- if ( smmu->num_mapping_groups == 0 )
- {
- smmu_err(smmu,
- "stream-matching supported, but no SMRs present!\n");
- return -ENODEV;
- }
-
- smr = SMMU_SMR_MASK_MASK << SMMU_SMR_MASK_SHIFT;
- smr |= (SMMU_SMR_ID_MASK << SMMU_SMR_ID_SHIFT);
- writel_relaxed(smr, gr0_base + SMMU_GR0_SMR(0));
- smr = readl_relaxed(gr0_base + SMMU_GR0_SMR(0));
-
- mask = (smr >> SMMU_SMR_MASK_SHIFT) & SMMU_SMR_MASK_MASK;
- sid = (smr >> SMMU_SMR_ID_SHIFT) & SMMU_SMR_ID_MASK;
- if ( (mask & sid) != sid )
- {
- smmu_err(smmu,
- "SMR mask bits (0x%x) insufficient for ID field (0x%x)\n",
- mask, sid);
- return -ENODEV;
- }
- smmu->smr_mask_mask = mask;
- smmu->smr_id_mask = sid;
-
- smmu_info(smmu,
- "\tstream matching with %u register groups, mask 0x%x\n",
- smmu->num_mapping_groups, mask);
- }
-
- /* ID1 */
- id = readl_relaxed(gr0_base + SMMU_GR0_ID1);
- smmu->pagesize = (id & SMMU_ID1_PAGESIZE) ? PAGE_SIZE_64K : PAGE_SIZE_4K;
-
- /* Check for size mismatch of SMMU address space from mapped region */
- size = 1 << (((id >> SMMU_ID1_NUMPAGENDXB_SHIFT) &
- SMMU_ID1_NUMPAGENDXB_MASK) + 1);
- size *= (smmu->pagesize << 1);
- if ( smmu->size != size )
- smmu_warn(smmu, "SMMU address space size (0x%lx) differs "
- "from mapped region size (0x%lx)!\n", size, smmu->size);
-
- smmu->num_s2_context_banks = (id >> SMMU_ID1_NUMS2CB_SHIFT) &
- SMMU_ID1_NUMS2CB_MASK;
- smmu->num_context_banks = (id >> SMMU_ID1_NUMCB_SHIFT) &
- SMMU_ID1_NUMCB_MASK;
- if ( smmu->num_s2_context_banks > smmu->num_context_banks )
- {
- smmu_err(smmu, "impossible number of S2 context banks!\n");
- return -ENODEV;
- }
- smmu_info(smmu, "\t%u context banks (%u stage-2 only)\n",
- smmu->num_context_banks, smmu->num_s2_context_banks);
-
- /* ID2 */
- id = readl_relaxed(gr0_base + SMMU_GR0_ID2);
- size = arm_smmu_id_size_to_bits((id >> SMMU_ID2_IAS_SHIFT) &
- SMMU_ID2_IAS_MASK);
-
- /*
- * Stage-1 output limited by stage-2 input size due to VTCR_EL2
- * setup (see setup_virt_paging)
- */
- /* Current maximum output size of 40 bits */
- smmu->s1_output_size = min(40UL, size);
-
- /* The stage-2 output mask is also applied for bypass */
- size = arm_smmu_id_size_to_bits((id >> SMMU_ID2_OAS_SHIFT) &
- SMMU_ID2_OAS_MASK);
- smmu->s2_output_size = min((unsigned long)PADDR_BITS, size);
-
- if ( smmu->version == 1 )
- smmu->input_size = 32;
- else
- {
-#ifdef CONFIG_ARM_64
- size = (id >> SMMU_ID2_UBS_SHIFT) & SMMU_ID2_UBS_MASK;
- size = min(39, arm_smmu_id_size_to_bits(size));
-#else
- size = 32;
-#endif
- smmu->input_size = size;
-
- if ( (PAGE_SIZE == PAGE_SIZE_4K && !(id & SMMU_ID2_PTFS_4K) ) ||
- (PAGE_SIZE == PAGE_SIZE_64K && !(id & SMMU_ID2_PTFS_64K)) ||
- (PAGE_SIZE != PAGE_SIZE_4K && PAGE_SIZE != PAGE_SIZE_64K) )
- {
- smmu_err(smmu, "CPU page size 0x%lx unsupported\n",
- PAGE_SIZE);
- return -ENODEV;
- }
- }
-
- smmu_info(smmu, "\t%lu-bit VA, %lu-bit IPA, %lu-bit PA\n",
- smmu->input_size, smmu->s1_output_size, smmu->s2_output_size);
- return 0;
-}
-
-static __init void arm_smmu_device_reset(struct arm_smmu_device *smmu)
-{
- void __iomem *gr0_base = SMMU_GR0(smmu);
- void __iomem *cb_base;
- int i = 0;
- u32 reg;
-
- smmu_dbg(smmu, "device reset\n");
-
- /* Clear Global FSR */
- reg = readl_relaxed(SMMU_GR0_NS(smmu) + SMMU_GR0_sGFSR);
- writel(reg, SMMU_GR0_NS(smmu) + SMMU_GR0_sGFSR);
-
- /* Mark all SMRn as invalid and all S2CRn as fault */
- for ( i = 0; i < smmu->num_mapping_groups; ++i )
- {
- writel_relaxed(~SMMU_SMR_VALID, gr0_base + SMMU_GR0_SMR(i));
- writel_relaxed(SMMU_S2CR_TYPE_FAULT, gr0_base + SMMU_GR0_S2CR(i));
- }
-
- /* Make sure all context banks are disabled and clear CB_FSR */
- for ( i = 0; i < smmu->num_context_banks; ++i )
- {
- cb_base = SMMU_CB_BASE(smmu) + SMMU_CB(smmu, i);
- writel_relaxed(0, cb_base + SMMU_CB_SCTLR);
- writel_relaxed(SMMU_FSR_FAULT, cb_base + SMMU_CB_FSR);
- }
-
- /* Invalidate the TLB, just in case */
- writel_relaxed(0, gr0_base + SMMU_GR0_STLBIALL);
- writel_relaxed(0, gr0_base + SMMU_GR0_TLBIALLH);
- writel_relaxed(0, gr0_base + SMMU_GR0_TLBIALLNSNH);
-
- reg = readl_relaxed(SMMU_GR0_NS(smmu) + SMMU_GR0_sCR0);
-
- /* Enable fault reporting */
- reg |= (SMMU_sCR0_GFRE | SMMU_sCR0_GFIE |
- SMMU_sCR0_GCFGFRE | SMMU_sCR0_GCFGFIE);
-
- /* Disable TLB broadcasting. */
- reg |= (SMMU_sCR0_VMIDPNE | SMMU_sCR0_PTM);
-
- /* Enable client access, generate a fault if no mapping is found */
- reg &= ~(SMMU_sCR0_CLIENTPD);
- reg |= SMMU_sCR0_USFCFG;
-
- /* Disable forced broadcasting */
- reg &= ~SMMU_sCR0_FB;
-
- /* Don't upgrade barriers when client devices are not mapped to
- * a translation context banks (just here for clarity as Xen policy
- * is to deny invalid transaction). */
- reg &= ~(SMMU_sCR0_BSU_MASK << SMMU_sCR0_BSU_SHIFT);
-
- /* Push the button */
- arm_smmu_tlb_sync(smmu);
- writel_relaxed(reg, SMMU_GR0_NS(smmu) + SMMU_GR0_sCR0);
-}
-
-static int arm_smmu_iommu_domain_init(struct domain *d)
-{
- struct arm_smmu_domain *smmu_domain;
-
- smmu_domain = xzalloc(struct arm_smmu_domain);
- if ( !smmu_domain )
- return -ENOMEM;
-
- spin_lock_init(&smmu_domain->lock);
- INIT_LIST_HEAD(&smmu_domain->contexts);
-
- domain_hvm_iommu(d)->arch.priv = smmu_domain;
-
- return 0;
-}
-
-static void __hwdom_init arm_smmu_iommu_hwdom_init(struct domain *d)
-{
-}
-
-static void arm_smmu_iommu_domain_teardown(struct domain *d)
-{
- struct arm_smmu_domain *smmu_domain = domain_hvm_iommu(d)->arch.priv;
-
- ASSERT(list_empty(&smmu_domain->contexts));
- xfree(smmu_domain);
-}
-
-static int arm_smmu_map_page(struct domain *d, unsigned long gfn,
- unsigned long mfn, unsigned int flags)
-{
- p2m_type_t t;
-
- /* Grant mappings can be used for DMA requests. The dev_bus_addr returned
by
- * the hypercall is the MFN (not the IPA). For device protected by
- * an IOMMU, Xen needs to add a 1:1 mapping in the domain p2m to
- * allow DMA request to work.
- * This is only valid when the domain is directed mapped. Hence this
- * function should only be used by gnttab code with gfn == mfn.
- */
- BUG_ON(!is_domain_direct_mapped(d));
- BUG_ON(mfn != gfn);
-
- /* We only support readable and writable flags */
- if ( !(flags & (IOMMUF_readable | IOMMUF_writable)) )
- return -EINVAL;
-
- t = (flags & IOMMUF_writable) ? p2m_iommu_map_rw : p2m_iommu_map_ro;
-
- /* The function guest_physmap_add_entry replaces the current mapping
- * if there is already one...
- */
- return guest_physmap_add_entry(d, gfn, mfn, 0, t);
-}
-
-static int arm_smmu_unmap_page(struct domain *d, unsigned long gfn)
-{
- /* This function should only be used by gnttab code when the domain
- * is direct mapped
- */
- if ( !is_domain_direct_mapped(d) )
- return -EINVAL;
-
- guest_physmap_remove_page(d, gfn, gfn, 0);
-
- return 0;
-}
-
-static const struct iommu_ops arm_smmu_iommu_ops = {
- .init = arm_smmu_iommu_domain_init,
- .hwdom_init = arm_smmu_iommu_hwdom_init,
- .teardown = arm_smmu_iommu_domain_teardown,
- .iotlb_flush = arm_smmu_iotlb_flush,
- .iotlb_flush_all = arm_smmu_iotlb_flush_all,
- .assign_dt_device = arm_smmu_attach_dev,
- .reassign_dt_device = arm_smmu_reassign_dt_dev,
- .map_page = arm_smmu_map_page,
- .unmap_page = arm_smmu_unmap_page,
-};
-
-static int __init smmu_init(struct dt_device_node *dev,
- const void *data)
-{
- struct arm_smmu_device *smmu;
- int res;
- u64 addr, size;
- unsigned int num_irqs, i;
- struct dt_phandle_args masterspec;
- struct rb_node *node;
-
- /* Even if the device can't be initialized, we don't want to give
- * the smmu device to dom0.
- */
- dt_device_set_used_by(dev, DOMID_XEN);
-
- smmu = xzalloc(struct arm_smmu_device);
- if ( !smmu )
- {
- printk(XENLOG_ERR "%s: failed to allocate arm_smmu_device\n",
- dt_node_full_name(dev));
- return -ENOMEM;
- }
-
- smmu->node = dev;
- check_driver_options(smmu);
-
- res = dt_device_get_address(smmu->node, 0, &addr, &size);
- if ( res )
- {
- smmu_err(smmu, "unable to retrieve the base address of the SMMU\n");
- goto out_err;
- }
-
- smmu->base = ioremap_nocache(addr, size);
- if ( !smmu->base )
- {
- smmu_err(smmu, "unable to map the SMMU memory\n");
- goto out_err;
- }
-
- smmu->size = size;
-
- if ( !dt_property_read_u32(smmu->node, "#global-interrupts",
- &smmu->num_global_irqs) )
- {
- smmu_err(smmu, "missing #global-interrupts\n");
- goto out_unmap;
- }
-
- num_irqs = dt_number_of_irq(smmu->node);
- if ( num_irqs > smmu->num_global_irqs )
- smmu->num_context_irqs = num_irqs - smmu->num_global_irqs;
-
- if ( !smmu->num_context_irqs )
- {
- smmu_err(smmu, "found %d interrupts but expected at least %d\n",
- num_irqs, smmu->num_global_irqs + 1);
- goto out_unmap;
- }
-
- smmu->irqs = xzalloc_array(unsigned int, num_irqs);
- if ( !smmu->irqs )
- {
- smmu_err(smmu, "failed to allocated %d irqs\n", num_irqs);
- goto out_unmap;
- }
-
- for ( i = 0; i < num_irqs; i++ )
- {
- res = platform_get_irq(smmu->node, i);
- if ( res < 0 )
- {
- smmu_err(smmu, "failed to get irq index %d\n", i);
- goto out_free_irqs;
- }
- smmu->irqs[i] = res;
- }
-
- smmu->sids = xzalloc_array(unsigned long,
- BITS_TO_LONGS(SMMU_MAX_STREAMIDS));
- if ( !smmu->sids )
- {
- smmu_err(smmu, "failed to allocated bitmap for stream ID tracking\n");
- goto out_free_masters;
- }
-
-
- i = 0;
- smmu->masters = RB_ROOT;
- while ( !dt_parse_phandle_with_args(smmu->node, "mmu-masters",
- "#stream-id-cells", i, &masterspec) )
- {
- res = register_smmu_master(smmu, &masterspec);
- if ( res )
- {
- smmu_err(smmu, "failed to add master %s\n",
- masterspec.np->name);
- goto out_free_masters;
- }
- i++;
- }
-
- smmu_info(smmu, "registered %d master devices\n", i);
-
- res = arm_smmu_device_cfg_probe(smmu);
- if ( res )
- {
- smmu_err(smmu, "failed to probe the SMMU\n");
- goto out_free_masters;
- }
-
- if ( smmu->version > 1 &&
- smmu->num_context_banks != smmu->num_context_irqs )
- {
- smmu_err(smmu,
- "found only %d context interrupt(s) but %d required\n",
- smmu->num_context_irqs, smmu->num_context_banks);
- goto out_free_masters;
- }
-
- smmu_dbg(smmu, "register global IRQs handler\n");
-
- for ( i = 0; i < smmu->num_global_irqs; ++i )
- {
- smmu_dbg(smmu, "\t- global IRQ %u\n", smmu->irqs[i]);
- res = request_irq(smmu->irqs[i], IRQF_SHARED, arm_smmu_global_fault,
- "arm-smmu global fault", smmu);
- if ( res )
- {
- smmu_err(smmu, "failed to request global IRQ %d (%u)\n",
- i, smmu->irqs[i]);
- goto out_release_irqs;
- }
- }
-
- INIT_LIST_HEAD(&smmu->list);
- list_add(&smmu->list, &arm_smmu_devices);
-
- arm_smmu_device_reset(smmu);
-
- iommu_set_ops(&arm_smmu_iommu_ops);
-
- /* sids field can be freed... */
- xfree(smmu->sids);
- smmu->sids = NULL;
-
- return 0;
-
-out_release_irqs:
- while (i--)
- release_irq(smmu->irqs[i], smmu);
-
-out_free_masters:
- for ( node = rb_first(&smmu->masters); node; node = rb_next(node) )
- {
- struct arm_smmu_master *master;
-
- master = container_of(node, struct arm_smmu_master, node);
- xfree(master);
- }
-
- xfree(smmu->sids);
-
-out_free_irqs:
- xfree(smmu->irqs);
-
-out_unmap:
- iounmap(smmu->base);
-
-out_err:
- xfree(smmu);
-
- return -ENODEV;
-}
-
-static const char * const smmu_dt_compat[] __initconst =
-{
- "arm,mmu-400",
- NULL
-};
-
-DT_DEVICE_START(smmu, "ARM SMMU", DEVICE_IOMMU)
- .compatible = smmu_dt_compat,
- .init = smmu_init,
-DT_DEVICE_END
-
-/*
- * Local variables:
- * mode: C
- * c-file-style: "BSD"
- * c-basic-offset: 4
- * indent-tabs-mode: nil
- * End:
- */
--
2.1.4
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