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linux/drivers/pci/intel-iommu.h
Keshavamurthy, Anil S ba39592764 Intel IOMMU: Intel IOMMU driver 
Actual intel IOMMU driver.  Hardware spec can be found at:
http://www.intel.com/technology/virtualization

This driver sets X86_64 'dma_ops', so hook into standard DMA APIs.  In this
way, PCI driver will get virtual DMA address.  This change is transparent to
PCI drivers.

[akpm@linux-foundation.org: remove unneeded cast]
[akpm@linux-foundation.org: build fix]
[bunk@stusta.de: fix duplicate CONFIG_DMAR Makefile line]
Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Cc: Andi Kleen <ak@suse.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Muli Ben-Yehuda <muli@il.ibm.com>
Cc: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Ashok Raj <ashok.raj@intel.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Christoph Lameter <clameter@sgi.com>
Cc: Greg KH <greg@kroah.com>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-22 08:13:18 -07:00

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/*
* 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) Ashok Raj <ashok.raj@intel.com>
* Copyright (C) Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
*/
#ifndef _INTEL_IOMMU_H_
#define _INTEL_IOMMU_H_
#include <linux/types.h>
#include <linux/msi.h>
#include "iova.h"
#include <linux/io.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 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 *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)
/* IOTLB_REG */
#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)
/* 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)
/* 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)
/* 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)
#define dma_frcd_page_addr(d) (d & (((u64)-1) << 12)) /* low 64 bit */
/*
* 0: Present
* 1-11: Reserved
* 12-63: Context Ptr (12 - (haw-1))
* 64-127: Reserved
*/
struct root_entry {
u64 val;
u64 rsvd1;
};
#define ROOT_ENTRY_NR (PAGE_SIZE_4K/sizeof(struct root_entry))
static inline bool root_present(struct root_entry *root)
{
return (root->val & 1);
}
static inline void set_root_present(struct root_entry *root)
{
root->val |= 1;
}
static inline void set_root_value(struct root_entry *root, unsigned long value)
{
root->val |= value & PAGE_MASK_4K;
}
struct context_entry;
static inline struct context_entry *
get_context_addr_from_root(struct root_entry *root)
{
return (struct context_entry *)
(root_present(root)?phys_to_virt(
root->val & PAGE_MASK_4K):
NULL);
}
/*
* low 64 bits:
* 0: present
* 1: fault processing disable
* 2-3: translation type
* 12-63: address space root
* high 64 bits:
* 0-2: address width
* 3-6: aval
* 8-23: domain id
*/
struct context_entry {
u64 lo;
u64 hi;
};
#define context_present(c) ((c).lo & 1)
#define context_fault_disable(c) (((c).lo >> 1) & 1)
#define context_translation_type(c) (((c).lo >> 2) & 3)
#define context_address_root(c) ((c).lo & PAGE_MASK_4K)
#define context_address_width(c) ((c).hi & 7)
#define context_domain_id(c) (((c).hi >> 8) & ((1 << 16) - 1))
#define context_set_present(c) do {(c).lo |= 1;} while (0)
#define context_set_fault_enable(c) \
do {(c).lo &= (((u64)-1) << 2) | 1;} while (0)
#define context_set_translation_type(c, val) \
do { \
(c).lo &= (((u64)-1) << 4) | 3; \
(c).lo |= ((val) & 3) << 2; \
} while (0)
#define CONTEXT_TT_MULTI_LEVEL 0
#define context_set_address_root(c, val) \
do {(c).lo |= (val) & PAGE_MASK_4K;} while (0)
#define context_set_address_width(c, val) do {(c).hi |= (val) & 7;} while (0)
#define context_set_domain_id(c, val) \
do {(c).hi |= ((val) & ((1 << 16) - 1)) << 8;} while (0)
#define context_clear_entry(c) do {(c).lo = 0; (c).hi = 0;} while (0)
/*
* 0: readable
* 1: writable
* 2-6: reserved
* 7: super page
* 8-11: available
* 12-63: Host physcial address
*/
struct dma_pte {
u64 val;
};
#define dma_clear_pte(p) do {(p).val = 0;} while (0)
#define DMA_PTE_READ (1)
#define DMA_PTE_WRITE (2)
#define dma_set_pte_readable(p) do {(p).val |= DMA_PTE_READ;} while (0)
#define dma_set_pte_writable(p) do {(p).val |= DMA_PTE_WRITE;} while (0)
#define dma_set_pte_prot(p, prot) \
do {(p).val = ((p).val & ~3) | ((prot) & 3); } while (0)
#define dma_pte_addr(p) ((p).val & PAGE_MASK_4K)
#define dma_set_pte_addr(p, addr) do {\
(p).val |= ((addr) & PAGE_MASK_4K); } while (0)
#define dma_pte_present(p) (((p).val & 3) != 0)
struct intel_iommu;
struct dmar_domain {
int id; /* domain id */
struct intel_iommu *iommu; /* back pointer to owning iommu */
struct list_head devices; /* all devices' list */
struct iova_domain iovad; /* iova's that belong to this domain */
struct dma_pte *pgd; /* virtual address */
spinlock_t mapping_lock; /* page table lock */
int gaw; /* max guest address width */
/* adjusted guest address width, 0 is level 2 30-bit */
int agaw;
#define DOMAIN_FLAG_MULTIPLE_DEVICES 1
int flags;
};
/* PCI domain-device relationship */
struct device_domain_info {
struct list_head link; /* link to domain siblings */
struct list_head global; /* link to global list */
u8 bus; /* PCI bus numer */
u8 devfn; /* PCI devfn number */
struct pci_dev *dev; /* it's NULL for PCIE-to-PCI bridge */
struct dmar_domain *domain; /* pointer to domain */
};
extern int init_dmars(void);
struct intel_iommu {
void __iomem *reg; /* Pointer to hardware regs, virtual addr */
u64 cap;
u64 ecap;
unsigned long *domain_ids; /* bitmap of domains */
struct dmar_domain **domains; /* ptr to domains */
int seg;
u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
spinlock_t lock; /* protect context, domain ids */
spinlock_t register_lock; /* protect register handling */
struct root_entry *root_entry; /* virtual address */
unsigned int irq;
unsigned char name[7]; /* Device Name */
struct msi_msg saved_msg;
struct sys_device sysdev;
};
#endif
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