diff options
Diffstat (limited to 'drivers/misc/cxl/cxl.h')
| -rw-r--r-- | drivers/misc/cxl/cxl.h | 1134 |
1 files changed, 1134 insertions, 0 deletions
diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h new file mode 100644 index 000000000..0562071cd --- /dev/null +++ b/drivers/misc/cxl/cxl.h @@ -0,0 +1,1134 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright 2014 IBM Corp. + */ + +#ifndef _CXL_H_ +#define _CXL_H_ + +#include <linux/interrupt.h> +#include <linux/semaphore.h> +#include <linux/device.h> +#include <linux/types.h> +#include <linux/cdev.h> +#include <linux/pid.h> +#include <linux/io.h> +#include <linux/pci.h> +#include <linux/fs.h> +#include <asm/cputable.h> +#include <asm/mmu.h> +#include <asm/reg.h> +#include <misc/cxl-base.h> + +#include <misc/cxl.h> +#include <uapi/misc/cxl.h> + +extern uint cxl_verbose; + +struct property; + +#define CXL_TIMEOUT 5 + +/* + * Bump version each time a user API change is made, whether it is + * backwards compatible ot not. + */ +#define CXL_API_VERSION 3 +#define CXL_API_VERSION_COMPATIBLE 1 + +/* + * Opaque types to avoid accidentally passing registers for the wrong MMIO + * + * At the end of the day, I'm not married to using typedef here, but it might + * (and has!) help avoid bugs like mixing up CXL_PSL_CtxTime and + * CXL_PSL_CtxTime_An, or calling cxl_p1n_write instead of cxl_p1_write. + * + * I'm quite happy if these are changed back to #defines before upstreaming, it + * should be little more than a regexp search+replace operation in this file. + */ +typedef struct { + const int x; +} cxl_p1_reg_t; +typedef struct { + const int x; +} cxl_p1n_reg_t; +typedef struct { + const int x; +} cxl_p2n_reg_t; +#define cxl_reg_off(reg) \ + (reg.x) + +/* Memory maps. Ref CXL Appendix A */ + +/* PSL Privilege 1 Memory Map */ +/* Configuration and Control area - CAIA 1&2 */ +static const cxl_p1_reg_t CXL_PSL_CtxTime = {0x0000}; +static const cxl_p1_reg_t CXL_PSL_ErrIVTE = {0x0008}; +static const cxl_p1_reg_t CXL_PSL_KEY1 = {0x0010}; +static const cxl_p1_reg_t CXL_PSL_KEY2 = {0x0018}; +static const cxl_p1_reg_t CXL_PSL_Control = {0x0020}; +/* Downloading */ +static const cxl_p1_reg_t CXL_PSL_DLCNTL = {0x0060}; +static const cxl_p1_reg_t CXL_PSL_DLADDR = {0x0068}; + +/* PSL Lookaside Buffer Management Area - CAIA 1 */ +static const cxl_p1_reg_t CXL_PSL_LBISEL = {0x0080}; +static const cxl_p1_reg_t CXL_PSL_SLBIE = {0x0088}; +static const cxl_p1_reg_t CXL_PSL_SLBIA = {0x0090}; +static const cxl_p1_reg_t CXL_PSL_TLBIE = {0x00A0}; +static const cxl_p1_reg_t CXL_PSL_TLBIA = {0x00A8}; +static const cxl_p1_reg_t CXL_PSL_AFUSEL = {0x00B0}; + +/* 0x00C0:7EFF Implementation dependent area */ +/* PSL registers - CAIA 1 */ +static const cxl_p1_reg_t CXL_PSL_FIR1 = {0x0100}; +static const cxl_p1_reg_t CXL_PSL_FIR2 = {0x0108}; +static const cxl_p1_reg_t CXL_PSL_Timebase = {0x0110}; +static const cxl_p1_reg_t CXL_PSL_VERSION = {0x0118}; +static const cxl_p1_reg_t CXL_PSL_RESLCKTO = {0x0128}; +static const cxl_p1_reg_t CXL_PSL_TB_CTLSTAT = {0x0140}; +static const cxl_p1_reg_t CXL_PSL_FIR_CNTL = {0x0148}; +static const cxl_p1_reg_t CXL_PSL_DSNDCTL = {0x0150}; +static const cxl_p1_reg_t CXL_PSL_SNWRALLOC = {0x0158}; +static const cxl_p1_reg_t CXL_PSL_TRACE = {0x0170}; +/* PSL registers - CAIA 2 */ +static const cxl_p1_reg_t CXL_PSL9_CONTROL = {0x0020}; +static const cxl_p1_reg_t CXL_XSL9_INV = {0x0110}; +static const cxl_p1_reg_t CXL_XSL9_DBG = {0x0130}; +static const cxl_p1_reg_t CXL_XSL9_DEF = {0x0140}; +static const cxl_p1_reg_t CXL_XSL9_DSNCTL = {0x0168}; +static const cxl_p1_reg_t CXL_PSL9_FIR1 = {0x0300}; +static const cxl_p1_reg_t CXL_PSL9_FIR_MASK = {0x0308}; +static const cxl_p1_reg_t CXL_PSL9_Timebase = {0x0310}; +static const cxl_p1_reg_t CXL_PSL9_DEBUG = {0x0320}; +static const cxl_p1_reg_t CXL_PSL9_FIR_CNTL = {0x0348}; +static const cxl_p1_reg_t CXL_PSL9_DSNDCTL = {0x0350}; +static const cxl_p1_reg_t CXL_PSL9_TB_CTLSTAT = {0x0340}; +static const cxl_p1_reg_t CXL_PSL9_TRACECFG = {0x0368}; +static const cxl_p1_reg_t CXL_PSL9_APCDEDALLOC = {0x0378}; +static const cxl_p1_reg_t CXL_PSL9_APCDEDTYPE = {0x0380}; +static const cxl_p1_reg_t CXL_PSL9_TNR_ADDR = {0x0388}; +static const cxl_p1_reg_t CXL_PSL9_CTCCFG = {0x0390}; +static const cxl_p1_reg_t CXL_PSL9_GP_CT = {0x0398}; +static const cxl_p1_reg_t CXL_XSL9_IERAT = {0x0588}; +static const cxl_p1_reg_t CXL_XSL9_ILPP = {0x0590}; + +/* 0x7F00:7FFF Reserved PCIe MSI-X Pending Bit Array area */ +/* 0x8000:FFFF Reserved PCIe MSI-X Table Area */ + +/* PSL Slice Privilege 1 Memory Map */ +/* Configuration Area - CAIA 1&2 */ +static const cxl_p1n_reg_t CXL_PSL_SR_An = {0x00}; +static const cxl_p1n_reg_t CXL_PSL_LPID_An = {0x08}; +static const cxl_p1n_reg_t CXL_PSL_AMBAR_An = {0x10}; +static const cxl_p1n_reg_t CXL_PSL_SPOffset_An = {0x18}; +static const cxl_p1n_reg_t CXL_PSL_ID_An = {0x20}; +static const cxl_p1n_reg_t CXL_PSL_SERR_An = {0x28}; +/* Memory Management and Lookaside Buffer Management - CAIA 1*/ +static const cxl_p1n_reg_t CXL_PSL_SDR_An = {0x30}; +/* Memory Management and Lookaside Buffer Management - CAIA 1&2 */ +static const cxl_p1n_reg_t CXL_PSL_AMOR_An = {0x38}; +/* Pointer Area - CAIA 1&2 */ +static const cxl_p1n_reg_t CXL_HAURP_An = {0x80}; +static const cxl_p1n_reg_t CXL_PSL_SPAP_An = {0x88}; +static const cxl_p1n_reg_t CXL_PSL_LLCMD_An = {0x90}; +/* Control Area - CAIA 1&2 */ +static const cxl_p1n_reg_t CXL_PSL_SCNTL_An = {0xA0}; +static const cxl_p1n_reg_t CXL_PSL_CtxTime_An = {0xA8}; +static const cxl_p1n_reg_t CXL_PSL_IVTE_Offset_An = {0xB0}; +static const cxl_p1n_reg_t CXL_PSL_IVTE_Limit_An = {0xB8}; +/* 0xC0:FF Implementation Dependent Area - CAIA 1&2 */ +static const cxl_p1n_reg_t CXL_PSL_FIR_SLICE_An = {0xC0}; +static const cxl_p1n_reg_t CXL_AFU_DEBUG_An = {0xC8}; +/* 0xC0:FF Implementation Dependent Area - CAIA 1 */ +static const cxl_p1n_reg_t CXL_PSL_APCALLOC_A = {0xD0}; +static const cxl_p1n_reg_t CXL_PSL_COALLOC_A = {0xD8}; +static const cxl_p1n_reg_t CXL_PSL_RXCTL_A = {0xE0}; +static const cxl_p1n_reg_t CXL_PSL_SLICE_TRACE = {0xE8}; + +/* PSL Slice Privilege 2 Memory Map */ +/* Configuration and Control Area - CAIA 1&2 */ +static const cxl_p2n_reg_t CXL_PSL_PID_TID_An = {0x000}; +static const cxl_p2n_reg_t CXL_CSRP_An = {0x008}; +/* Configuration and Control Area - CAIA 1 */ +static const cxl_p2n_reg_t CXL_AURP0_An = {0x010}; +static const cxl_p2n_reg_t CXL_AURP1_An = {0x018}; +static const cxl_p2n_reg_t CXL_SSTP0_An = {0x020}; +static const cxl_p2n_reg_t CXL_SSTP1_An = {0x028}; +/* Configuration and Control Area - CAIA 1 */ +static const cxl_p2n_reg_t CXL_PSL_AMR_An = {0x030}; +/* Segment Lookaside Buffer Management - CAIA 1 */ +static const cxl_p2n_reg_t CXL_SLBIE_An = {0x040}; +static const cxl_p2n_reg_t CXL_SLBIA_An = {0x048}; +static const cxl_p2n_reg_t CXL_SLBI_Select_An = {0x050}; +/* Interrupt Registers - CAIA 1&2 */ +static const cxl_p2n_reg_t CXL_PSL_DSISR_An = {0x060}; +static const cxl_p2n_reg_t CXL_PSL_DAR_An = {0x068}; +static const cxl_p2n_reg_t CXL_PSL_DSR_An = {0x070}; +static const cxl_p2n_reg_t CXL_PSL_TFC_An = {0x078}; +static const cxl_p2n_reg_t CXL_PSL_PEHandle_An = {0x080}; +static const cxl_p2n_reg_t CXL_PSL_ErrStat_An = {0x088}; +/* AFU Registers - CAIA 1&2 */ +static const cxl_p2n_reg_t CXL_AFU_Cntl_An = {0x090}; +static const cxl_p2n_reg_t CXL_AFU_ERR_An = {0x098}; +/* Work Element Descriptor - CAIA 1&2 */ +static const cxl_p2n_reg_t CXL_PSL_WED_An = {0x0A0}; +/* 0x0C0:FFF Implementation Dependent Area */ + +#define CXL_PSL_SPAP_Addr 0x0ffffffffffff000ULL +#define CXL_PSL_SPAP_Size 0x0000000000000ff0ULL +#define CXL_PSL_SPAP_Size_Shift 4 +#define CXL_PSL_SPAP_V 0x0000000000000001ULL + +/****** CXL_PSL_Control ****************************************************/ +#define CXL_PSL_Control_tb (0x1ull << (63-63)) +#define CXL_PSL_Control_Fr (0x1ull << (63-31)) +#define CXL_PSL_Control_Fs_MASK (0x3ull << (63-29)) +#define CXL_PSL_Control_Fs_Complete (0x3ull << (63-29)) + +/****** CXL_PSL_DLCNTL *****************************************************/ +#define CXL_PSL_DLCNTL_D (0x1ull << (63-28)) +#define CXL_PSL_DLCNTL_C (0x1ull << (63-29)) +#define CXL_PSL_DLCNTL_E (0x1ull << (63-30)) +#define CXL_PSL_DLCNTL_S (0x1ull << (63-31)) +#define CXL_PSL_DLCNTL_CE (CXL_PSL_DLCNTL_C | CXL_PSL_DLCNTL_E) +#define CXL_PSL_DLCNTL_DCES (CXL_PSL_DLCNTL_D | CXL_PSL_DLCNTL_CE | CXL_PSL_DLCNTL_S) + +/****** CXL_PSL_SR_An ******************************************************/ +#define CXL_PSL_SR_An_SF MSR_SF /* 64bit */ +#define CXL_PSL_SR_An_TA (1ull << (63-1)) /* Tags active, GA1: 0 */ +#define CXL_PSL_SR_An_HV MSR_HV /* Hypervisor, GA1: 0 */ +#define CXL_PSL_SR_An_XLAT_hpt (0ull << (63-6))/* Hashed page table (HPT) mode */ +#define CXL_PSL_SR_An_XLAT_roh (2ull << (63-6))/* Radix on HPT mode */ +#define CXL_PSL_SR_An_XLAT_ror (3ull << (63-6))/* Radix on Radix mode */ +#define CXL_PSL_SR_An_BOT (1ull << (63-10)) /* Use the in-memory segment table */ +#define CXL_PSL_SR_An_PR MSR_PR /* Problem state, GA1: 1 */ +#define CXL_PSL_SR_An_ISL (1ull << (63-53)) /* Ignore Segment Large Page */ +#define CXL_PSL_SR_An_TC (1ull << (63-54)) /* Page Table secondary hash */ +#define CXL_PSL_SR_An_US (1ull << (63-56)) /* User state, GA1: X */ +#define CXL_PSL_SR_An_SC (1ull << (63-58)) /* Segment Table secondary hash */ +#define CXL_PSL_SR_An_R MSR_DR /* Relocate, GA1: 1 */ +#define CXL_PSL_SR_An_MP (1ull << (63-62)) /* Master Process */ +#define CXL_PSL_SR_An_LE (1ull << (63-63)) /* Little Endian */ + +/****** CXL_PSL_ID_An ****************************************************/ +#define CXL_PSL_ID_An_F (1ull << (63-31)) +#define CXL_PSL_ID_An_L (1ull << (63-30)) + +/****** CXL_PSL_SERR_An ****************************************************/ +#define CXL_PSL_SERR_An_afuto (1ull << (63-0)) +#define CXL_PSL_SERR_An_afudis (1ull << (63-1)) +#define CXL_PSL_SERR_An_afuov (1ull << (63-2)) +#define CXL_PSL_SERR_An_badsrc (1ull << (63-3)) +#define CXL_PSL_SERR_An_badctx (1ull << (63-4)) +#define CXL_PSL_SERR_An_llcmdis (1ull << (63-5)) +#define CXL_PSL_SERR_An_llcmdto (1ull << (63-6)) +#define CXL_PSL_SERR_An_afupar (1ull << (63-7)) +#define CXL_PSL_SERR_An_afudup (1ull << (63-8)) +#define CXL_PSL_SERR_An_IRQS ( \ + CXL_PSL_SERR_An_afuto | CXL_PSL_SERR_An_afudis | CXL_PSL_SERR_An_afuov | \ + CXL_PSL_SERR_An_badsrc | CXL_PSL_SERR_An_badctx | CXL_PSL_SERR_An_llcmdis | \ + CXL_PSL_SERR_An_llcmdto | CXL_PSL_SERR_An_afupar | CXL_PSL_SERR_An_afudup) +#define CXL_PSL_SERR_An_afuto_mask (1ull << (63-32)) +#define CXL_PSL_SERR_An_afudis_mask (1ull << (63-33)) +#define CXL_PSL_SERR_An_afuov_mask (1ull << (63-34)) +#define CXL_PSL_SERR_An_badsrc_mask (1ull << (63-35)) +#define CXL_PSL_SERR_An_badctx_mask (1ull << (63-36)) +#define CXL_PSL_SERR_An_llcmdis_mask (1ull << (63-37)) +#define CXL_PSL_SERR_An_llcmdto_mask (1ull << (63-38)) +#define CXL_PSL_SERR_An_afupar_mask (1ull << (63-39)) +#define CXL_PSL_SERR_An_afudup_mask (1ull << (63-40)) +#define CXL_PSL_SERR_An_IRQ_MASKS ( \ + CXL_PSL_SERR_An_afuto_mask | CXL_PSL_SERR_An_afudis_mask | CXL_PSL_SERR_An_afuov_mask | \ + CXL_PSL_SERR_An_badsrc_mask | CXL_PSL_SERR_An_badctx_mask | CXL_PSL_SERR_An_llcmdis_mask | \ + CXL_PSL_SERR_An_llcmdto_mask | CXL_PSL_SERR_An_afupar_mask | CXL_PSL_SERR_An_afudup_mask) + +#define CXL_PSL_SERR_An_AE (1ull << (63-30)) + +/****** CXL_PSL_SCNTL_An ****************************************************/ +#define CXL_PSL_SCNTL_An_CR (0x1ull << (63-15)) +/* Programming Modes: */ +#define CXL_PSL_SCNTL_An_PM_MASK (0xffffull << (63-31)) +#define CXL_PSL_SCNTL_An_PM_Shared (0x0000ull << (63-31)) +#define CXL_PSL_SCNTL_An_PM_OS (0x0001ull << (63-31)) +#define CXL_PSL_SCNTL_An_PM_Process (0x0002ull << (63-31)) +#define CXL_PSL_SCNTL_An_PM_AFU (0x0004ull << (63-31)) +#define CXL_PSL_SCNTL_An_PM_AFU_PBT (0x0104ull << (63-31)) +/* Purge Status (ro) */ +#define CXL_PSL_SCNTL_An_Ps_MASK (0x3ull << (63-39)) +#define CXL_PSL_SCNTL_An_Ps_Pending (0x1ull << (63-39)) +#define CXL_PSL_SCNTL_An_Ps_Complete (0x3ull << (63-39)) +/* Purge */ +#define CXL_PSL_SCNTL_An_Pc (0x1ull << (63-48)) +/* Suspend Status (ro) */ +#define CXL_PSL_SCNTL_An_Ss_MASK (0x3ull << (63-55)) +#define CXL_PSL_SCNTL_An_Ss_Pending (0x1ull << (63-55)) +#define CXL_PSL_SCNTL_An_Ss_Complete (0x3ull << (63-55)) +/* Suspend Control */ +#define CXL_PSL_SCNTL_An_Sc (0x1ull << (63-63)) + +/* AFU Slice Enable Status (ro) */ +#define CXL_AFU_Cntl_An_ES_MASK (0x7ull << (63-2)) +#define CXL_AFU_Cntl_An_ES_Disabled (0x0ull << (63-2)) +#define CXL_AFU_Cntl_An_ES_Enabled (0x4ull << (63-2)) +/* AFU Slice Enable */ +#define CXL_AFU_Cntl_An_E (0x1ull << (63-3)) +/* AFU Slice Reset status (ro) */ +#define CXL_AFU_Cntl_An_RS_MASK (0x3ull << (63-5)) +#define CXL_AFU_Cntl_An_RS_Pending (0x1ull << (63-5)) +#define CXL_AFU_Cntl_An_RS_Complete (0x2ull << (63-5)) +/* AFU Slice Reset */ +#define CXL_AFU_Cntl_An_RA (0x1ull << (63-7)) + +/****** CXL_SSTP0/1_An ******************************************************/ +/* These top bits are for the segment that CONTAINS the segment table */ +#define CXL_SSTP0_An_B_SHIFT SLB_VSID_SSIZE_SHIFT +#define CXL_SSTP0_An_KS (1ull << (63-2)) +#define CXL_SSTP0_An_KP (1ull << (63-3)) +#define CXL_SSTP0_An_N (1ull << (63-4)) +#define CXL_SSTP0_An_L (1ull << (63-5)) +#define CXL_SSTP0_An_C (1ull << (63-6)) +#define CXL_SSTP0_An_TA (1ull << (63-7)) +#define CXL_SSTP0_An_LP_SHIFT (63-9) /* 2 Bits */ +/* And finally, the virtual address & size of the segment table: */ +#define CXL_SSTP0_An_SegTableSize_SHIFT (63-31) /* 12 Bits */ +#define CXL_SSTP0_An_SegTableSize_MASK \ + (((1ull << 12) - 1) << CXL_SSTP0_An_SegTableSize_SHIFT) +#define CXL_SSTP0_An_STVA_U_MASK ((1ull << (63-49))-1) +#define CXL_SSTP1_An_STVA_L_MASK (~((1ull << (63-55))-1)) +#define CXL_SSTP1_An_V (1ull << (63-63)) + +/****** CXL_PSL_SLBIE_[An] - CAIA 1 **************************************************/ +/* write: */ +#define CXL_SLBIE_C PPC_BIT(36) /* Class */ +#define CXL_SLBIE_SS PPC_BITMASK(37, 38) /* Segment Size */ +#define CXL_SLBIE_SS_SHIFT PPC_BITLSHIFT(38) +#define CXL_SLBIE_TA PPC_BIT(38) /* Tags Active */ +/* read: */ +#define CXL_SLBIE_MAX PPC_BITMASK(24, 31) +#define CXL_SLBIE_PENDING PPC_BITMASK(56, 63) + +/****** Common to all CXL_TLBIA/SLBIA_[An] - CAIA 1 **********************************/ +#define CXL_TLB_SLB_P (1ull) /* Pending (read) */ + +/****** Common to all CXL_TLB/SLB_IA/IE_[An] registers - CAIA 1 **********************/ +#define CXL_TLB_SLB_IQ_ALL (0ull) /* Inv qualifier */ +#define CXL_TLB_SLB_IQ_LPID (1ull) /* Inv qualifier */ +#define CXL_TLB_SLB_IQ_LPIDPID (3ull) /* Inv qualifier */ + +/****** CXL_PSL_AFUSEL ******************************************************/ +#define CXL_PSL_AFUSEL_A (1ull << (63-55)) /* Adapter wide invalidates affect all AFUs */ + +/****** CXL_PSL_DSISR_An - CAIA 1 ****************************************************/ +#define CXL_PSL_DSISR_An_DS (1ull << (63-0)) /* Segment not found */ +#define CXL_PSL_DSISR_An_DM (1ull << (63-1)) /* PTE not found (See also: M) or protection fault */ +#define CXL_PSL_DSISR_An_ST (1ull << (63-2)) /* Segment Table PTE not found */ +#define CXL_PSL_DSISR_An_UR (1ull << (63-3)) /* AURP PTE not found */ +#define CXL_PSL_DSISR_TRANS (CXL_PSL_DSISR_An_DS | CXL_PSL_DSISR_An_DM | CXL_PSL_DSISR_An_ST | CXL_PSL_DSISR_An_UR) +#define CXL_PSL_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ +#define CXL_PSL_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ +#define CXL_PSL_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ +#define CXL_PSL_DSISR_PENDING (CXL_PSL_DSISR_TRANS | CXL_PSL_DSISR_An_PE | CXL_PSL_DSISR_An_AE | CXL_PSL_DSISR_An_OC) +/* NOTE: Bits 32:63 are undefined if DSISR[DS] = 1 */ +#define CXL_PSL_DSISR_An_M DSISR_NOHPTE /* PTE not found */ +#define CXL_PSL_DSISR_An_P DSISR_PROTFAULT /* Storage protection violation */ +#define CXL_PSL_DSISR_An_A (1ull << (63-37)) /* AFU lock access to write through or cache inhibited storage */ +#define CXL_PSL_DSISR_An_S DSISR_ISSTORE /* Access was afu_wr or afu_zero */ +#define CXL_PSL_DSISR_An_K DSISR_KEYFAULT /* Access not permitted by virtual page class key protection */ + +/****** CXL_PSL_DSISR_An - CAIA 2 ****************************************************/ +#define CXL_PSL9_DSISR_An_TF (1ull << (63-3)) /* Translation fault */ +#define CXL_PSL9_DSISR_An_PE (1ull << (63-4)) /* PSL Error (implementation specific) */ +#define CXL_PSL9_DSISR_An_AE (1ull << (63-5)) /* AFU Error */ +#define CXL_PSL9_DSISR_An_OC (1ull << (63-6)) /* OS Context Warning */ +#define CXL_PSL9_DSISR_An_S (1ull << (63-38)) /* TF for a write operation */ +#define CXL_PSL9_DSISR_PENDING (CXL_PSL9_DSISR_An_TF | CXL_PSL9_DSISR_An_PE | CXL_PSL9_DSISR_An_AE | CXL_PSL9_DSISR_An_OC) +/* + * NOTE: Bits 56:63 (Checkout Response Status) are valid when DSISR_An[TF] = 1 + * Status (0:7) Encoding + */ +#define CXL_PSL9_DSISR_An_CO_MASK 0x00000000000000ffULL +#define CXL_PSL9_DSISR_An_SF 0x0000000000000080ULL /* Segment Fault 0b10000000 */ +#define CXL_PSL9_DSISR_An_PF_SLR 0x0000000000000088ULL /* PTE not found (Single Level Radix) 0b10001000 */ +#define CXL_PSL9_DSISR_An_PF_RGC 0x000000000000008CULL /* PTE not found (Radix Guest (child)) 0b10001100 */ +#define CXL_PSL9_DSISR_An_PF_RGP 0x0000000000000090ULL /* PTE not found (Radix Guest (parent)) 0b10010000 */ +#define CXL_PSL9_DSISR_An_PF_HRH 0x0000000000000094ULL /* PTE not found (HPT/Radix Host) 0b10010100 */ +#define CXL_PSL9_DSISR_An_PF_STEG 0x000000000000009CULL /* PTE not found (STEG VA) 0b10011100 */ +#define CXL_PSL9_DSISR_An_URTCH 0x00000000000000B4ULL /* Unsupported Radix Tree Configuration 0b10110100 */ + +/****** CXL_PSL_TFC_An ******************************************************/ +#define CXL_PSL_TFC_An_A (1ull << (63-28)) /* Acknowledge non-translation fault */ +#define CXL_PSL_TFC_An_C (1ull << (63-29)) /* Continue (abort transaction) */ +#define CXL_PSL_TFC_An_AE (1ull << (63-30)) /* Restart PSL with address error */ +#define CXL_PSL_TFC_An_R (1ull << (63-31)) /* Restart PSL transaction */ + +/****** CXL_PSL_DEBUG *****************************************************/ +#define CXL_PSL_DEBUG_CDC (1ull << (63-27)) /* Coherent Data cache support */ + +/****** CXL_XSL9_IERAT_ERAT - CAIA 2 **********************************/ +#define CXL_XSL9_IERAT_MLPID (1ull << (63-0)) /* Match LPID */ +#define CXL_XSL9_IERAT_MPID (1ull << (63-1)) /* Match PID */ +#define CXL_XSL9_IERAT_PRS (1ull << (63-4)) /* PRS bit for Radix invalidations */ +#define CXL_XSL9_IERAT_INVR (1ull << (63-3)) /* Invalidate Radix */ +#define CXL_XSL9_IERAT_IALL (1ull << (63-8)) /* Invalidate All */ +#define CXL_XSL9_IERAT_IINPROG (1ull << (63-63)) /* Invalidate in progress */ + +/* cxl_process_element->software_status */ +#define CXL_PE_SOFTWARE_STATE_V (1ul << (31 - 0)) /* Valid */ +#define CXL_PE_SOFTWARE_STATE_C (1ul << (31 - 29)) /* Complete */ +#define CXL_PE_SOFTWARE_STATE_S (1ul << (31 - 30)) /* Suspend */ +#define CXL_PE_SOFTWARE_STATE_T (1ul << (31 - 31)) /* Terminate */ + +/****** CXL_PSL_RXCTL_An (Implementation Specific) ************************** + * Controls AFU Hang Pulse, which sets the timeout for the AFU to respond to + * the PSL for any response (except MMIO). Timeouts will occur between 1x to 2x + * of the hang pulse frequency. + */ +#define CXL_PSL_RXCTL_AFUHP_4S 0x7000000000000000ULL + +/* SPA->sw_command_status */ +#define CXL_SPA_SW_CMD_MASK 0xffff000000000000ULL +#define CXL_SPA_SW_CMD_TERMINATE 0x0001000000000000ULL +#define CXL_SPA_SW_CMD_REMOVE 0x0002000000000000ULL +#define CXL_SPA_SW_CMD_SUSPEND 0x0003000000000000ULL +#define CXL_SPA_SW_CMD_RESUME 0x0004000000000000ULL +#define CXL_SPA_SW_CMD_ADD 0x0005000000000000ULL +#define CXL_SPA_SW_CMD_UPDATE 0x0006000000000000ULL +#define CXL_SPA_SW_STATE_MASK 0x0000ffff00000000ULL +#define CXL_SPA_SW_STATE_TERMINATED 0x0000000100000000ULL +#define CXL_SPA_SW_STATE_REMOVED 0x0000000200000000ULL +#define CXL_SPA_SW_STATE_SUSPENDED 0x0000000300000000ULL +#define CXL_SPA_SW_STATE_RESUMED 0x0000000400000000ULL +#define CXL_SPA_SW_STATE_ADDED 0x0000000500000000ULL +#define CXL_SPA_SW_STATE_UPDATED 0x0000000600000000ULL +#define CXL_SPA_SW_PSL_ID_MASK 0x00000000ffff0000ULL +#define CXL_SPA_SW_LINK_MASK 0x000000000000ffffULL + +#define CXL_MAX_SLICES 4 +#define MAX_AFU_MMIO_REGS 3 + +#define CXL_MODE_TIME_SLICED 0x4 +#define CXL_SUPPORTED_MODES (CXL_MODE_DEDICATED | CXL_MODE_DIRECTED) + +#define CXL_DEV_MINORS 13 /* 1 control + 4 AFUs * 3 (dedicated/master/shared) */ +#define CXL_CARD_MINOR(adapter) (adapter->adapter_num * CXL_DEV_MINORS) +#define CXL_DEVT_ADAPTER(dev) (MINOR(dev) / CXL_DEV_MINORS) + +#define CXL_PSL9_TRACEID_MAX 0xAU +#define CXL_PSL9_TRACESTATE_FIN 0x3U + +enum cxl_context_status { + CLOSED, + OPENED, + STARTED +}; + +enum prefault_modes { + CXL_PREFAULT_NONE, + CXL_PREFAULT_WED, + CXL_PREFAULT_ALL, +}; + +enum cxl_attrs { + CXL_ADAPTER_ATTRS, + CXL_AFU_MASTER_ATTRS, + CXL_AFU_ATTRS, +}; + +struct cxl_sste { + __be64 esid_data; + __be64 vsid_data; +}; + +#define to_cxl_adapter(d) container_of(d, struct cxl, dev) +#define to_cxl_afu(d) container_of(d, struct cxl_afu, dev) + +struct cxl_afu_native { + void __iomem *p1n_mmio; + void __iomem *afu_desc_mmio; + irq_hw_number_t psl_hwirq; + unsigned int psl_virq; + struct mutex spa_mutex; + /* + * Only the first part of the SPA is used for the process element + * linked list. The only other part that software needs to worry about + * is sw_command_status, which we store a separate pointer to. + * Everything else in the SPA is only used by hardware + */ + struct cxl_process_element *spa; + __be64 *sw_command_status; + unsigned int spa_size; + int spa_order; + int spa_max_procs; + u64 pp_offset; +}; + +struct cxl_afu_guest { + struct cxl_afu *parent; + u64 handle; + phys_addr_t p2n_phys; + u64 p2n_size; + int max_ints; + bool handle_err; + struct delayed_work work_err; + int previous_state; +}; + +struct cxl_afu { + struct cxl_afu_native *native; + struct cxl_afu_guest *guest; + irq_hw_number_t serr_hwirq; + unsigned int serr_virq; + char *psl_irq_name; + char *err_irq_name; + void __iomem *p2n_mmio; + phys_addr_t psn_phys; + u64 pp_size; + + struct cxl *adapter; + struct device dev; + struct cdev afu_cdev_s, afu_cdev_m, afu_cdev_d; + struct device *chardev_s, *chardev_m, *chardev_d; + struct idr contexts_idr; + struct dentry *debugfs; + struct mutex contexts_lock; + spinlock_t afu_cntl_lock; + + /* -1: AFU deconfigured/locked, >= 0: number of readers */ + atomic_t configured_state; + + /* AFU error buffer fields and bin attribute for sysfs */ + u64 eb_len, eb_offset; + struct bin_attribute attr_eb; + + /* pointer to the vphb */ + struct pci_controller *phb; + + int pp_irqs; + int irqs_max; + int num_procs; + int max_procs_virtualised; + int slice; + int modes_supported; + int current_mode; + int crs_num; + u64 crs_len; + u64 crs_offset; + struct list_head crs; + enum prefault_modes prefault_mode; + bool psa; + bool pp_psa; + bool enabled; +}; + + +struct cxl_irq_name { + struct list_head list; + char *name; +}; + +struct irq_avail { + irq_hw_number_t offset; + irq_hw_number_t range; + unsigned long *bitmap; +}; + +/* + * This is a cxl context. If the PSL is in dedicated mode, there will be one + * of these per AFU. If in AFU directed there can be lots of these. + */ +struct cxl_context { + struct cxl_afu *afu; + + /* Problem state MMIO */ + phys_addr_t psn_phys; + u64 psn_size; + + /* Used to unmap any mmaps when force detaching */ + struct address_space *mapping; + struct mutex mapping_lock; + struct page *ff_page; + bool mmio_err_ff; + bool kernelapi; + + spinlock_t sste_lock; /* Protects segment table entries */ + struct cxl_sste *sstp; + u64 sstp0, sstp1; + unsigned int sst_size, sst_lru; + + wait_queue_head_t wq; + /* use mm context associated with this pid for ds faults */ + struct pid *pid; + spinlock_t lock; /* Protects pending_irq_mask, pending_fault and fault_addr */ + /* Only used in PR mode */ + u64 process_token; + + /* driver private data */ + void *priv; + + unsigned long *irq_bitmap; /* Accessed from IRQ context */ + struct cxl_irq_ranges irqs; + struct list_head irq_names; + u64 fault_addr; + u64 fault_dsisr; + u64 afu_err; + + /* + * This status and it's lock pretects start and detach context + * from racing. It also prevents detach from racing with + * itself + */ + enum cxl_context_status status; + struct mutex status_mutex; + + + /* XXX: Is it possible to need multiple work items at once? */ + struct work_struct fault_work; + u64 dsisr; + u64 dar; + + struct cxl_process_element *elem; + + /* + * pe is the process element handle, assigned by this driver when the + * context is initialized. + * + * external_pe is the PE shown outside of cxl. + * On bare-metal, pe=external_pe, because we decide what the handle is. + * In a guest, we only find out about the pe used by pHyp when the + * context is attached, and that's the value we want to report outside + * of cxl. + */ + int pe; + int external_pe; + + u32 irq_count; + bool pe_inserted; + bool master; + bool kernel; + bool pending_irq; + bool pending_fault; + bool pending_afu_err; + + /* Used by AFU drivers for driver specific event delivery */ + struct cxl_afu_driver_ops *afu_driver_ops; + atomic_t afu_driver_events; + + struct rcu_head rcu; + + struct mm_struct *mm; + + u16 tidr; + bool assign_tidr; +}; + +struct cxl_irq_info; + +struct cxl_service_layer_ops { + int (*adapter_regs_init)(struct cxl *adapter, struct pci_dev *dev); + int (*invalidate_all)(struct cxl *adapter); + int (*afu_regs_init)(struct cxl_afu *afu); + int (*sanitise_afu_regs)(struct cxl_afu *afu); + int (*register_serr_irq)(struct cxl_afu *afu); + void (*release_serr_irq)(struct cxl_afu *afu); + irqreturn_t (*handle_interrupt)(int irq, struct cxl_context *ctx, struct cxl_irq_info *irq_info); + irqreturn_t (*fail_irq)(struct cxl_afu *afu, struct cxl_irq_info *irq_info); + int (*activate_dedicated_process)(struct cxl_afu *afu); + int (*attach_afu_directed)(struct cxl_context *ctx, u64 wed, u64 amr); + int (*attach_dedicated_process)(struct cxl_context *ctx, u64 wed, u64 amr); + void (*update_dedicated_ivtes)(struct cxl_context *ctx); + void (*debugfs_add_adapter_regs)(struct cxl *adapter, struct dentry *dir); + void (*debugfs_add_afu_regs)(struct cxl_afu *afu, struct dentry *dir); + void (*psl_irq_dump_registers)(struct cxl_context *ctx); + void (*err_irq_dump_registers)(struct cxl *adapter); + void (*debugfs_stop_trace)(struct cxl *adapter); + void (*write_timebase_ctrl)(struct cxl *adapter); + u64 (*timebase_read)(struct cxl *adapter); + int capi_mode; + bool needs_reset_before_disable; +}; + +struct cxl_native { + u64 afu_desc_off; + u64 afu_desc_size; + void __iomem *p1_mmio; + void __iomem *p2_mmio; + irq_hw_number_t err_hwirq; + unsigned int err_virq; + u64 ps_off; + bool no_data_cache; /* set if no data cache on the card */ + const struct cxl_service_layer_ops *sl_ops; +}; + +struct cxl_guest { + struct platform_device *pdev; + int irq_nranges; + struct cdev cdev; + irq_hw_number_t irq_base_offset; + struct irq_avail *irq_avail; + spinlock_t irq_alloc_lock; + u64 handle; + char *status; + u16 vendor; + u16 device; + u16 subsystem_vendor; + u16 subsystem; +}; + +struct cxl { + struct cxl_native *native; + struct cxl_guest *guest; + spinlock_t afu_list_lock; + struct cxl_afu *afu[CXL_MAX_SLICES]; + struct device dev; + struct dentry *trace; + struct dentry *psl_err_chk; + struct dentry *debugfs; + char *irq_name; + struct bin_attribute cxl_attr; + int adapter_num; + int user_irqs; + u64 ps_size; + u16 psl_rev; + u16 base_image; + u8 vsec_status; + u8 caia_major; + u8 caia_minor; + u8 slices; + bool user_image_loaded; + bool perst_loads_image; + bool perst_select_user; + bool perst_same_image; + bool psl_timebase_synced; + bool tunneled_ops_supported; + + /* + * number of contexts mapped on to this card. Possible values are: + * >0: Number of contexts mapped and new one can be mapped. + * 0: No active contexts and new ones can be mapped. + * -1: No contexts mapped and new ones cannot be mapped. + */ + atomic_t contexts_num; +}; + +int cxl_pci_alloc_one_irq(struct cxl *adapter); +void cxl_pci_release_one_irq(struct cxl *adapter, int hwirq); +int cxl_pci_alloc_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter, unsigned int num); +void cxl_pci_release_irq_ranges(struct cxl_irq_ranges *irqs, struct cxl *adapter); +int cxl_pci_setup_irq(struct cxl *adapter, unsigned int hwirq, unsigned int virq); +int cxl_update_image_control(struct cxl *adapter); +int cxl_pci_reset(struct cxl *adapter); +void cxl_pci_release_afu(struct device *dev); +ssize_t cxl_pci_read_adapter_vpd(struct cxl *adapter, void *buf, size_t len); + +/* common == phyp + powernv - CAIA 1&2 */ +struct cxl_process_element_common { + __be32 tid; + __be32 pid; + __be64 csrp; + union { + struct { + __be64 aurp0; + __be64 aurp1; + __be64 sstp0; + __be64 sstp1; + } psl8; /* CAIA 1 */ + struct { + u8 reserved2[8]; + u8 reserved3[8]; + u8 reserved4[8]; + u8 reserved5[8]; + } psl9; /* CAIA 2 */ + } u; + __be64 amr; + u8 reserved6[4]; + __be64 wed; +} __packed; + +/* just powernv - CAIA 1&2 */ +struct cxl_process_element { + __be64 sr; + __be64 SPOffset; + union { + __be64 sdr; /* CAIA 1 */ + u8 reserved1[8]; /* CAIA 2 */ + } u; + __be64 haurp; + __be32 ctxtime; + __be16 ivte_offsets[4]; + __be16 ivte_ranges[4]; + __be32 lpid; + struct cxl_process_element_common common; + __be32 software_state; +} __packed; + +static inline bool cxl_adapter_link_ok(struct cxl *cxl, struct cxl_afu *afu) +{ + struct pci_dev *pdev; + + if (cpu_has_feature(CPU_FTR_HVMODE)) { + pdev = to_pci_dev(cxl->dev.parent); + return !pci_channel_offline(pdev); + } + return true; +} + +static inline void __iomem *_cxl_p1_addr(struct cxl *cxl, cxl_p1_reg_t reg) +{ + WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); + return cxl->native->p1_mmio + cxl_reg_off(reg); +} + +static inline void cxl_p1_write(struct cxl *cxl, cxl_p1_reg_t reg, u64 val) +{ + if (likely(cxl_adapter_link_ok(cxl, NULL))) + out_be64(_cxl_p1_addr(cxl, reg), val); +} + +static inline u64 cxl_p1_read(struct cxl *cxl, cxl_p1_reg_t reg) +{ + if (likely(cxl_adapter_link_ok(cxl, NULL))) + return in_be64(_cxl_p1_addr(cxl, reg)); + else + return ~0ULL; +} + +static inline void __iomem *_cxl_p1n_addr(struct cxl_afu *afu, cxl_p1n_reg_t reg) +{ + WARN_ON(!cpu_has_feature(CPU_FTR_HVMODE)); + return afu->native->p1n_mmio + cxl_reg_off(reg); +} + +static inline void cxl_p1n_write(struct cxl_afu *afu, cxl_p1n_reg_t reg, u64 val) +{ + if (likely(cxl_adapter_link_ok(afu->adapter, afu))) + out_be64(_cxl_p1n_addr(afu, reg), val); +} + +static inline u64 cxl_p1n_read(struct cxl_afu *afu, cxl_p1n_reg_t reg) +{ + if (likely(cxl_adapter_link_ok(afu->adapter, afu))) + return in_be64(_cxl_p1n_addr(afu, reg)); + else + return ~0ULL; +} + +static inline void __iomem *_cxl_p2n_addr(struct cxl_afu *afu, cxl_p2n_reg_t reg) +{ + return afu->p2n_mmio + cxl_reg_off(reg); +} + +static inline void cxl_p2n_write(struct cxl_afu *afu, cxl_p2n_reg_t reg, u64 val) +{ + if (likely(cxl_adapter_link_ok(afu->adapter, afu))) + out_be64(_cxl_p2n_addr(afu, reg), val); +} + +static inline u64 cxl_p2n_read(struct cxl_afu *afu, cxl_p2n_reg_t reg) +{ + if (likely(cxl_adapter_link_ok(afu->adapter, afu))) + return in_be64(_cxl_p2n_addr(afu, reg)); + else + return ~0ULL; +} + +static inline bool cxl_is_power8(void) +{ + if ((pvr_version_is(PVR_POWER8E)) || + (pvr_version_is(PVR_POWER8NVL)) || + (pvr_version_is(PVR_POWER8))) + return true; + return false; +} + +static inline bool cxl_is_power9(void) +{ + if (pvr_version_is(PVR_POWER9)) + return true; + return false; +} + +ssize_t cxl_pci_afu_read_err_buffer(struct cxl_afu *afu, char *buf, + loff_t off, size_t count); + + +struct cxl_calls { + void (*cxl_slbia)(struct mm_struct *mm); + struct module *owner; +}; +int register_cxl_calls(struct cxl_calls *calls); +void unregister_cxl_calls(struct cxl_calls *calls); +int cxl_update_properties(struct device_node *dn, struct property *new_prop); + +void cxl_remove_adapter_nr(struct cxl *adapter); + +void cxl_release_spa(struct cxl_afu *afu); + +dev_t cxl_get_dev(void); +int cxl_file_init(void); +void cxl_file_exit(void); +int cxl_register_adapter(struct cxl *adapter); +int cxl_register_afu(struct cxl_afu *afu); +int cxl_chardev_d_afu_add(struct cxl_afu *afu); +int cxl_chardev_m_afu_add(struct cxl_afu *afu); +int cxl_chardev_s_afu_add(struct cxl_afu *afu); +void cxl_chardev_afu_remove(struct cxl_afu *afu); + +void cxl_context_detach_all(struct cxl_afu *afu); +void cxl_context_free(struct cxl_context *ctx); +void cxl_context_detach(struct cxl_context *ctx); + +int cxl_sysfs_adapter_add(struct cxl *adapter); +void cxl_sysfs_adapter_remove(struct cxl *adapter); +int cxl_sysfs_afu_add(struct cxl_afu *afu); +void cxl_sysfs_afu_remove(struct cxl_afu *afu); +int cxl_sysfs_afu_m_add(struct cxl_afu *afu); +void cxl_sysfs_afu_m_remove(struct cxl_afu *afu); + +struct cxl *cxl_alloc_adapter(void); +struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice); +int cxl_afu_select_best_mode(struct cxl_afu *afu); + +int cxl_native_register_psl_irq(struct cxl_afu *afu); +void cxl_native_release_psl_irq(struct cxl_afu *afu); +int cxl_native_register_psl_err_irq(struct cxl *adapter); +void cxl_native_release_psl_err_irq(struct cxl *adapter); +int cxl_native_register_serr_irq(struct cxl_afu *afu); +void cxl_native_release_serr_irq(struct cxl_afu *afu); +int afu_register_irqs(struct cxl_context *ctx, u32 count); +void afu_release_irqs(struct cxl_context *ctx, void *cookie); +void afu_irq_name_free(struct cxl_context *ctx); + +int cxl_attach_afu_directed_psl9(struct cxl_context *ctx, u64 wed, u64 amr); +int cxl_attach_afu_directed_psl8(struct cxl_context *ctx, u64 wed, u64 amr); +int cxl_activate_dedicated_process_psl9(struct cxl_afu *afu); +int cxl_activate_dedicated_process_psl8(struct cxl_afu *afu); +int cxl_attach_dedicated_process_psl9(struct cxl_context *ctx, u64 wed, u64 amr); +int cxl_attach_dedicated_process_psl8(struct cxl_context *ctx, u64 wed, u64 amr); +void cxl_update_dedicated_ivtes_psl9(struct cxl_context *ctx); +void cxl_update_dedicated_ivtes_psl8(struct cxl_context *ctx); + +#ifdef CONFIG_DEBUG_FS + +void cxl_debugfs_init(void); +void cxl_debugfs_exit(void); +void cxl_debugfs_adapter_add(struct cxl *adapter); +void cxl_debugfs_adapter_remove(struct cxl *adapter); +void cxl_debugfs_afu_add(struct cxl_afu *afu); +void cxl_debugfs_afu_remove(struct cxl_afu *afu); +void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, struct dentry *dir); +void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, struct dentry *dir); +void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir); +void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir); + +#else /* CONFIG_DEBUG_FS */ + +static inline void __init cxl_debugfs_init(void) +{ +} + +static inline void cxl_debugfs_exit(void) +{ +} + +static inline void cxl_debugfs_adapter_add(struct cxl *adapter) +{ +} + +static inline void cxl_debugfs_adapter_remove(struct cxl *adapter) +{ +} + +static inline void cxl_debugfs_afu_add(struct cxl_afu *afu) +{ +} + +static inline void cxl_debugfs_afu_remove(struct cxl_afu *afu) +{ +} + +static inline void cxl_debugfs_add_adapter_regs_psl9(struct cxl *adapter, + struct dentry *dir) +{ +} + +static inline void cxl_debugfs_add_adapter_regs_psl8(struct cxl *adapter, + struct dentry *dir) +{ +} + +static inline void cxl_debugfs_add_afu_regs_psl9(struct cxl_afu *afu, struct dentry *dir) +{ +} + +static inline void cxl_debugfs_add_afu_regs_psl8(struct cxl_afu *afu, struct dentry *dir) +{ +} + +#endif /* CONFIG_DEBUG_FS */ + +void cxl_handle_fault(struct work_struct *work); +void cxl_prefault(struct cxl_context *ctx, u64 wed); +int cxl_handle_mm_fault(struct mm_struct *mm, u64 dsisr, u64 dar); + +struct cxl *get_cxl_adapter(int num); +int cxl_alloc_sst(struct cxl_context *ctx); +void cxl_dump_debug_buffer(void *addr, size_t size); + +void init_cxl_native(void); + +struct cxl_context *cxl_context_alloc(void); +int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master); +void cxl_context_set_mapping(struct cxl_context *ctx, + struct address_space *mapping); +void cxl_context_free(struct cxl_context *ctx); +int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma); +unsigned int cxl_map_irq(struct cxl *adapter, irq_hw_number_t hwirq, + irq_handler_t handler, void *cookie, const char *name); +void cxl_unmap_irq(unsigned int virq, void *cookie); +int __detach_context(struct cxl_context *ctx); + +/* + * This must match the layout of the H_COLLECT_CA_INT_INFO retbuf defined + * in PAPR. + * Field pid_tid is now 'reserved' because it's no more used on bare-metal. + * On a guest environment, PSL_PID_An is located on the upper 32 bits and + * PSL_TID_An register in the lower 32 bits. + */ +struct cxl_irq_info { + u64 dsisr; + u64 dar; + u64 dsr; + u64 reserved; + u64 afu_err; + u64 errstat; + u64 proc_handle; + u64 padding[2]; /* to match the expected retbuf size for plpar_hcall9 */ +}; + +void cxl_assign_psn_space(struct cxl_context *ctx); +int cxl_invalidate_all_psl9(struct cxl *adapter); +int cxl_invalidate_all_psl8(struct cxl *adapter); +irqreturn_t cxl_irq_psl9(int irq, struct cxl_context *ctx, struct cxl_irq_info *irq_info); +irqreturn_t cxl_irq_psl8(int irq, struct cxl_context *ctx, struct cxl_irq_info *irq_info); +irqreturn_t cxl_fail_irq_psl(struct cxl_afu *afu, struct cxl_irq_info *irq_info); +int cxl_register_one_irq(struct cxl *adapter, irq_handler_t handler, + void *cookie, irq_hw_number_t *dest_hwirq, + unsigned int *dest_virq, const char *name); + +int cxl_check_error(struct cxl_afu *afu); +int cxl_afu_slbia(struct cxl_afu *afu); +int cxl_data_cache_flush(struct cxl *adapter); +int cxl_afu_disable(struct cxl_afu *afu); +int cxl_psl_purge(struct cxl_afu *afu); +int cxl_calc_capp_routing(struct pci_dev *dev, u64 *chipid, + u32 *phb_index, u64 *capp_unit_id); +int cxl_slot_is_switched(struct pci_dev *dev); +int cxl_get_xsl9_dsnctl(struct pci_dev *dev, u64 capp_unit_id, u64 *reg); +u64 cxl_calculate_sr(bool master, bool kernel, bool real_mode, bool p9); + +void cxl_native_irq_dump_regs_psl9(struct cxl_context *ctx); +void cxl_native_irq_dump_regs_psl8(struct cxl_context *ctx); +void cxl_native_err_irq_dump_regs_psl8(struct cxl *adapter); +void cxl_native_err_irq_dump_regs_psl9(struct cxl *adapter); +int cxl_pci_vphb_add(struct cxl_afu *afu); +void cxl_pci_vphb_remove(struct cxl_afu *afu); +void cxl_release_mapping(struct cxl_context *ctx); + +extern struct pci_driver cxl_pci_driver; +extern struct platform_driver cxl_of_driver; +int afu_allocate_irqs(struct cxl_context *ctx, u32 count); + +int afu_open(struct inode *inode, struct file *file); +int afu_release(struct inode *inode, struct file *file); +long afu_ioctl(struct file *file, unsigned int cmd, unsigned long arg); +int afu_mmap(struct file *file, struct vm_area_struct *vm); +__poll_t afu_poll(struct file *file, struct poll_table_struct *poll); +ssize_t afu_read(struct file *file, char __user *buf, size_t count, loff_t *off); +extern const struct file_operations afu_fops; + +struct cxl *cxl_guest_init_adapter(struct device_node *np, struct platform_device *dev); +void cxl_guest_remove_adapter(struct cxl *adapter); +int cxl_of_read_adapter_handle(struct cxl *adapter, struct device_node *np); +int cxl_of_read_adapter_properties(struct cxl *adapter, struct device_node *np); +ssize_t cxl_guest_read_adapter_vpd(struct cxl *adapter, void *buf, size_t len); +ssize_t cxl_guest_read_afu_vpd(struct cxl_afu *afu, void *buf, size_t len); +int cxl_guest_init_afu(struct cxl *adapter, int slice, struct device_node *afu_np); +void cxl_guest_remove_afu(struct cxl_afu *afu); +int cxl_of_read_afu_handle(struct cxl_afu *afu, struct device_node *afu_np); +int cxl_of_read_afu_properties(struct cxl_afu *afu, struct device_node *afu_np); +int cxl_guest_add_chardev(struct cxl *adapter); +void cxl_guest_remove_chardev(struct cxl *adapter); +void cxl_guest_reload_module(struct cxl *adapter); +int cxl_of_probe(struct platform_device *pdev); + +struct cxl_backend_ops { + struct module *module; + int (*adapter_reset)(struct cxl *adapter); + int (*alloc_one_irq)(struct cxl *adapter); + void (*release_one_irq)(struct cxl *adapter, int hwirq); + int (*alloc_irq_ranges)(struct cxl_irq_ranges *irqs, + struct cxl *adapter, unsigned int num); + void (*release_irq_ranges)(struct cxl_irq_ranges *irqs, + struct cxl *adapter); + int (*setup_irq)(struct cxl *adapter, unsigned int hwirq, + unsigned int virq); + irqreturn_t (*handle_psl_slice_error)(struct cxl_context *ctx, + u64 dsisr, u64 errstat); + irqreturn_t (*psl_interrupt)(int irq, void *data); + int (*ack_irq)(struct cxl_context *ctx, u64 tfc, u64 psl_reset_mask); + void (*irq_wait)(struct cxl_context *ctx); + int (*attach_process)(struct cxl_context *ctx, bool kernel, + u64 wed, u64 amr); + int (*detach_process)(struct cxl_context *ctx); + void (*update_ivtes)(struct cxl_context *ctx); + bool (*support_attributes)(const char *attr_name, enum cxl_attrs type); + bool (*link_ok)(struct cxl *cxl, struct cxl_afu *afu); + void (*release_afu)(struct device *dev); + ssize_t (*afu_read_err_buffer)(struct cxl_afu *afu, char *buf, + loff_t off, size_t count); + int (*afu_check_and_enable)(struct cxl_afu *afu); + int (*afu_activate_mode)(struct cxl_afu *afu, int mode); + int (*afu_deactivate_mode)(struct cxl_afu *afu, int mode); + int (*afu_reset)(struct cxl_afu *afu); + int (*afu_cr_read8)(struct cxl_afu *afu, int cr_idx, u64 offset, u8 *val); + int (*afu_cr_read16)(struct cxl_afu *afu, int cr_idx, u64 offset, u16 *val); + int (*afu_cr_read32)(struct cxl_afu *afu, int cr_idx, u64 offset, u32 *val); + int (*afu_cr_read64)(struct cxl_afu *afu, int cr_idx, u64 offset, u64 *val); + int (*afu_cr_write8)(struct cxl_afu *afu, int cr_idx, u64 offset, u8 val); + int (*afu_cr_write16)(struct cxl_afu *afu, int cr_idx, u64 offset, u16 val); + int (*afu_cr_write32)(struct cxl_afu *afu, int cr_idx, u64 offset, u32 val); + ssize_t (*read_adapter_vpd)(struct cxl *adapter, void *buf, size_t count); +}; +extern const struct cxl_backend_ops cxl_native_ops; +extern const struct cxl_backend_ops cxl_guest_ops; +extern const struct cxl_backend_ops *cxl_ops; + +/* check if the given pci_dev is on the cxl vphb bus */ +bool cxl_pci_is_vphb_device(struct pci_dev *dev); + +/* decode AFU error bits in the PSL register PSL_SERR_An */ +void cxl_afu_decode_psl_serr(struct cxl_afu *afu, u64 serr); + +/* + * Increments the number of attached contexts on an adapter. + * In case an adapter_context_lock is taken the return -EBUSY. + */ +int cxl_adapter_context_get(struct cxl *adapter); + +/* Decrements the number of attached contexts on an adapter */ +void cxl_adapter_context_put(struct cxl *adapter); + +/* If no active contexts then prevents contexts from being attached */ +int cxl_adapter_context_lock(struct cxl *adapter); + +/* Unlock the contexts-lock if taken. Warn and force unlock otherwise */ +void cxl_adapter_context_unlock(struct cxl *adapter); + +/* Increases the reference count to "struct mm_struct" */ +void cxl_context_mm_count_get(struct cxl_context *ctx); + +/* Decrements the reference count to "struct mm_struct" */ +void cxl_context_mm_count_put(struct cxl_context *ctx); + +#endif |