/*
* Copyright (c) 2006, Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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.
*
* Copyright (C) 2006-2008 Intel Corporation
* Author: Ashok Raj <ashok.raj@intel.com>
* Author: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
*/
#ifndef _INTEL_IOMMU_H_
#define _INTEL_IOMMU_H_
#include <linux/types.h>
#include <linux/iova.h>
#include <linux/io.h>
#include <linux/dma_remapping.h>
#include <asm/cacheflush.h>
#include <asm/iommu.h>
/*
* Intel IOMMU register specification per version 1.0 public spec.
*/
#define DMAR_VER_REG 0x0 /* Arch version supported by this IOMMU */
#define DMAR_CAP_REG 0x8 /* Hardware supported capabilities */
#define DMAR_ECAP_REG 0x10 /* Extended capabilities supported */
#define DMAR_GCMD_REG 0x18 /* Global command register */
#define DMAR_GSTS_REG 0x1c /* Global status register */
#define DMAR_RTADDR_REG 0x20 /* Root entry table */
#define DMAR_CCMD_REG 0x28 /* Context command reg */
#define DMAR_FSTS_REG 0x34 /* Fault Status register */
#define DMAR_FECTL_REG 0x38 /* Fault control register */
#define DMAR_FEDATA_REG 0x3c /* Fault event interrupt data register */
#define DMAR_FEADDR_REG 0x40 /* Fault event interrupt addr register */
#define DMAR_FEUADDR_REG 0x44 /* Upper address register */
#define DMAR_AFLOG_REG 0x58 /* Advanced Fault control */
#define DMAR_PMEN_REG 0x64 /* Enable Protected Memory Region */
#define DMAR_PLMBASE_REG 0x68 /* PMRR Low addr */
#define DMAR_PLMLIMIT_REG 0x6c /* PMRR low limit */
#define DMAR_PHMBASE_REG 0x70 /* pmrr high base addr */
#define DMAR_PHMLIMIT_REG 0x78 /* pmrr high limit */
#define DMAR_IQH_REG 0x80 /* Invalidation queue head register */
#define DMAR_IQT_REG 0x88 /* Invalidation queue tail register */
#define DMAR_IQA_REG 0x90 /* Invalidation queue addr register */
#define DMAR_ICS_REG 0x98 /* Invalidation complete status register */
#define DMAR_IRTA_REG 0xb8 /* Interrupt remapping table addr register */
#define OFFSET_STRIDE (9)
/*
#define dmar_readl(dmar, reg) readl(dmar + reg)
#define dmar_readq(dmar, reg) ({ \
u32 lo, hi; \
lo = readl(dmar + reg); \
hi = readl(dmar + reg + 4); \
(((u64) hi) << 32) + lo; })
*/
static inline u64 dmar_readq(void __iomem *addr)
{
u32 lo, hi;
lo = readl(addr);
hi = readl(addr + 4);
return (((u64) hi) << 32) + lo;
}
static inline void dmar_writeq(void __iomem *addr, u64 val)
{
writel((u32)val, addr);
writel((u32)(val >> 32), addr + 4);
}
#define DMAR_VER_MAJOR(v) (((v) & 0xf0) >> 4)
#define DMAR_VER_MINOR(v) ((v) & 0x0f)
/*
* Decoding Capability Register
*/
#define cap_read_drain(c) (((c) >> 55) & 1)
#define cap_write_drain(c) (((c) >> 54) & 1)
#define cap_max_amask_val(c) (((c) >> 48) & 0x3f)
#define cap_num_fault_regs(c) ((((c) >> 40) & 0xff) + 1)
#define cap_pgsel_inv(c) (((c) >> 39) & 1)
#define cap_super_page_val(c) (((c) >> 34) & 0xf)
#define cap_super_offset(c) (((find_first_bit(&cap_super_page_val(c), 4)) \
* OFFSET_STRIDE) + 21)
#define cap_fault_reg_offset(c) ((((c) >> 24) & 0x3ff) * 16)
#define cap_max_fault_reg_offset(c) \
(cap_fault_reg_offset(c) + cap_num_fault_regs(c) * 16)
#define cap_zlr(c) (((c) >> 22) & 1)
#define cap_isoch(c) (((c) >> 23) & 1)
#define cap_mgaw(c) ((((c) >> 16) & 0x3f) + 1)
#define cap_sagaw(c) (((c) >> 8) & 0x1f)
#define cap_caching_mode(c) (((c) >> 7) & 1)
#define cap_phmr(c) (((c) >> 6) & 1)
#define cap_plmr(c) (((c) >> 5) & 1)
#define cap_rwbf(c) (((c) >> 4) & 1)
#define cap_afl(c) (((c) >> 3) & 1)
#define cap_ndoms(c) (((unsigned long)1) << (4 + 2 * ((c) & 0x7)))
/*
* Extended Capability Register
*/
#define ecap_niotlb_iunits(e) ((((e) >> 24) & 0xff) + 1)
#define ecap_iotlb_offset(e) ((((e) >> 8) & 0x3ff) * 16)
#define ecap_max_iotlb_offset(e) \
(ecap_iotlb_offset(e) + ecap_niotlb_iunits(e) * 16)
#define ecap_coherent(e) ((e) & 0x1)
#define ecap_qis(e) ((e) & 0x2)
#define ecap_eim_support(e) ((e >> 4) & 0x1)
#define ecap_ir_support(e) ((e >> 3) & 0x1)
#define ecap_max_handle_mask(e) ((e >> 20) & 0xf)
/* IOTLB_REG */
#define DMA_TLB_FLUSH_GRANU_OFFSET 60
#define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60)
#define DMA_TLB_DSI_FLUSH (((u64)2) << 60)
#define DMA_TLB_PSI_FLUSH (((u64)3) << 60)
#define DMA_TLB_IIRG(type) ((type >> 60) & 7)
#define DMA_TLB_IAIG(val) (((val) >> 57) & 7)
#define DMA_TLB_READ_DRAIN (((u64)1) << 49)
#define DMA_TLB_WRITE_DRAIN (((u64)1) << 48)
#define DMA_TLB_DID(id) (((u64)((id) & 0xffff)) << 32)
#define DMA_TLB_IVT (((u64)1) << 63)
#define DMA_TLB_IH_NONLEAF (((u64)1) << 6)
#define DMA_TLB_MAX_SIZE (0x3f)
/* INVALID_DESC */
#define DMA_CCMD_INVL_GRANU_OFFSET 61
#define DMA_ID_TLB_GLOBAL_FLUSH (((u64)1) << 3)
#define DMA_ID_TLB_DSI_FLUSH (((u64)2) << 3)
#define DMA_ID_TLB_PSI_FLUSH (((u64)3) << 3)
#define DMA_ID_TLB_READ_DRAIN (((u64)1) << 7)
#define DMA_ID_TLB_WRITE_DRAIN (((u64)1) << 6)
#define DMA_ID_TLB_DID(id) (((u64)((id & 0xffff) << 16)))
#define DMA_ID_TLB_IH_NONLEAF (((u64)1) << 6)
#define DMA_ID_TLB_ADDR(addr) (addr)
#define DMA_ID_TLB_ADDR_MASK(mask) (mask)
/* PMEN_REG */
#define DMA_PMEN_EPM (((u32)1)<<31)
#define DMA_PMEN_PRS (((u32)1)<<0)
/* GCMD_REG */
#define DMA_GCMD_TE (((u32)1) << 31)
#define DMA_GCMD_SRTP (((u32)1) << 30)
#define DMA_GCMD_SFL (((u32)1) << 29)
#define DMA_GCMD_EAFL (((u32)1) << 28)
#define DMA_GCMD_WBF (((u32)1) << 27)
#define DMA_GCMD_QIE (((u32)1) << 26)
#define DMA_GCMD_SIRTP (((u32)1) << 24)
#define DMA_GCMD_IRE (((u32) 1) << 25)
/* GSTS_REG */
#define DMA_GSTS_TES (((u32)1) << 31)
#define DMA_GSTS_RTPS (((u32)1) << 30)
#define DMA_GSTS_FLS (((u32)1) << 29)
#define DMA_GSTS_AFLS (((u32)1) << 28)
#define DMA_GSTS_WBFS (((u32)1) << 27)
#define DMA_GSTS_QIES (((u32)1) << 26)
#define DMA_GSTS_IRTPS (((u32)1) << 24)
#define DMA_GSTS_IRES (((u32)1) << 25)
/* CCMD_REG */
#define DMA_CCMD_ICC (((u64)1) << 63)
#define DMA_CCMD_GLOBAL_INVL (((u64)1) << 61)
#define DMA_CCMD_DOMAIN_INVL (((u64)2) << 61)
#define DMA_CCMD_DEVICE_INVL (((u64)3) << 61)
#define DMA_CCMD_FM(m) (((u64)((m) & 0x3)) << 32)
#define DMA_CCMD_MASK_NOBIT 0
#define DMA_CCMD_MASK_1BIT 1
#define DMA_CCMD_MASK_2BIT 2
#define DMA_CCMD_MASK_3BIT 3
#define DMA_CCMD_SID(s) (((u64)((s) & 0xffff)) << 16)
#define DMA_CCMD_DID(d) ((u64)((d) & 0xffff))
/* FECTL_REG */
#define DMA_FECTL_IM (((u32)1) << 31)
/* FSTS_REG */
#define DMA_FSTS_PPF ((u32)2)
#define DMA_FSTS_PFO ((u32)1)
#define dma_fsts_fault_record_index(s) (((s) >> 8) & 0xff)
/* FRCD_REG, 32 bits access */
#define DMA_FRCD_F (((u32)1) << 31)
#define dma_frcd_type(d) ((d >> 30) & 1)
#define dma_frcd_fault_reason(c) (c & 0xff)
#define dma_frcd_source_id(c) (c & 0xffff)
/* low 64 bit */
#define dma_frcd_page_addr(d) (d & (((u64)-1) << PAGE_SHIFT))
#define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \
do { \
cycles_t start_time = get_cycles(); \
while (1) { \
sts = op(iommu->reg + offset); \
if (cond) \
break; \
if (DMAR_OPERATION_TIMEOUT < (get_cycles() - start_time))\
panic("DMAR hardware is malfunctioning\n"); \
cpu_relax(); \
} \
} while (0)
#define QI_LENGTH 256 /* queue length */
enum {
QI_FREE,
QI_IN_USE,
QI_DONE
};
#define QI_CC_TYPE 0x1
#define QI_IOTLB_TYPE 0x2
#define QI_DIOTLB_TYPE 0x3
#define QI_IEC_TYPE 0x4
#define QI_IWD_TYPE 0x5
#define QI_IEC_SELECTIVE (((u64)1) << 4)
#define QI_IEC_IIDEX(idx) (((u64)(idx & 0xffff) << 32))
#define QI_IEC_IM(m) (((u64)(m & 0x1f) << 27))
#define QI_IWD_STATUS_DATA(d) (((u64)d) << 32)
#define QI_IWD_STATUS_WRITE (((u64)1) << 5)
#define QI_IOTLB_DID(did) (((u64)did) << 16)
#define QI_IOTLB_DR(dr) (((u64)dr) << 7)
#define QI_IOTLB_DW(dw) (((u64)dw) << 6)
#define QI_IOTLB_GRAN(gran) (((u64)gran) >> (DMA_TLB_FLUSH_GRANU_OFFSET-4))
#define QI_IOTLB_ADDR(addr) (((u64)addr) & VTD_PAGE_MASK)
#define QI_IOTLB_IH(ih) (((u64)ih) << 6)
#define QI_IOTLB_AM(am) (((u8)am))
#define QI_CC_FM(fm) (((u64)fm) << 48)
#define QI_CC_SID(sid) (((u64)sid) << 32)
#define QI_CC_DID(did) (((u64)did) << 16)
#define QI_CC_GRAN(gran) (((u64)gran) >> (DMA_CCMD_INVL_GRANU_OFFSET-4))
struct qi_desc {
u64 low, high;
};
struct q_inval {
spinlock_t q_lock;
struct qi_desc *desc; /* invalidation queue */
int *desc_status; /* desc status */
int free_head; /* first free entry */
int free_tail; /* last free entry */
int free_cnt;
};
#ifdef CONFIG_INTR_REMAP
/* 1MB - maximum possible interrupt remapping table size */
#define INTR_REMAP_PAGE_ORDER 8
#define INTR_REMAP_TABLE_REG_SIZE 0xf
#define INTR_REMAP_TABLE_ENTRIES 65536
struct ir_table {
struct irte *base;
};
#endif
struct iommu_flush {
int (*flush_context)(struct intel_iommu *iommu, u16 did, u16 sid, u8 fm,
u64 type, int non_present_entry_flush);
int (*flush_iotlb)(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type, int non_present_entry_flush);
};
struct intel_iommu {
void __iomem *reg; /* Pointer to hardware regs, virtual addr */
u64 cap;
u64 ecap;
u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
spinlock_t register_lock; /* protect register handling */
int seq_id; /* sequence id of the iommu */
int agaw; /* agaw of this iommu */
#ifdef CONFIG_DMAR
unsigned long *domain_ids; /* bitmap of domains */
struct dmar_domain **domains; /* ptr to domains */
spinlock_t lock; /* protect context, domain ids */
struct root_entry *root_entry; /* virtual address */
unsigned int irq;
unsigned char name[7]; /* Device Name */
struct iommu_flush flush;
#endif
struct q_inval *qi; /* Queued invalidation info */
#ifdef CONFIG_INTR_REMAP
struct ir_table *ir_table; /* Interrupt remapping info */
#endif
};
static inline void __iommu_flush_cache(
struct intel_iommu *iommu, void *addr, int size)
{
if (!ecap_coherent(iommu->ecap))
clflush_cache_range(addr, size);
}
extern struct dmar_drhd_unit * dmar_find_matched_drhd_unit(struct pci_dev *dev);
extern int alloc_iommu(struct dmar_drhd_unit *drhd);
extern void free_iommu(struct intel_iommu *iommu);
extern int dmar_enable_qi(struct intel_iommu *iommu);
extern void qi_global_iec(struct intel_iommu *iommu);
extern int qi_flush_context(struct intel_iommu *iommu, u16 did, u16 sid,
u8 fm, u64 type, int non_present_entry_flush);
extern int qi_flush_iotlb(struct intel_iommu *iommu, u16 did, u64 addr,
unsigned int size_order, u64 type,
int non_present_entry_flush);
extern void qi_submit_sync(struct qi_desc *desc, struct intel_iommu *iommu);
int intel_iommu_map_address(struct dmar_domain *domain, dma_addr_t iova,
u64 hpa, size_t size, int prot);
void intel_iommu_unmap_address(struct dmar_domain *domain,
dma_addr_t iova, size_t size);
u64 intel_iommu_iova_to_phys(struct dmar_domain *domain, u64 iova);
#ifdef CONFIG_DMAR
int intel_iommu_found(void);
#else /* CONFIG_DMAR */
static inline int intel_iommu_found(void)
{
return 0;
}
#endif /* CONFIG_DMAR */
extern void *intel_alloc_coherent(struct device *, size_t, dma_addr_t *, gfp_t);
extern void intel_free_coherent(struct device *, size_t, void *, dma_addr_t);
extern dma_addr_t intel_map_single(struct device *, phys_addr_t, size_t, int);
extern void intel_unmap_single(struct device *, dma_addr_t, size_t, int);
extern int intel_map_sg(struct device *, struct scatterlist *, int, int);
extern void intel_unmap_sg(struct device *, struct scatterlist *, int, int);
#endif
