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/* Copyright 2013-2014 IBM Corp.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
* implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
* IBM System P PSI (Processor Service Interface)
*/
#ifndef __PSI_H
#define __PSI_H
#include <skiboot.h>
/*
* PSI Host Bridge Registers (MMIO)
*
* The PSI interface is the bridge to the FPS, it has its own
* registers. The FSP registers appear at an offset within the
* aperture defined by the PSI_FSPBAR
*/
/* Base address of the PSI MMIO space and LSB is the enable/valid bit */
#define PSIHB_BBAR 0x00
/* FSP MMIO region -- this is where the mbx regs are (offset defined below) */
#define PSIHB_FSPBAR 0x08
/* FSP MMIO region mask register -- determines size of region */
#define PSIHB_FSPMMR 0x10
/* TCE address register */
#define PSIHB_TAR 0x18
#define PSIHB_TAR_8K_ENTRIES 0
#define PSIHB_TAR_16K_ENTRIES 1
#define PSIHB_TAR_256K_ENTRIES 2 /* P8 only */
#define PSIHB_TAR_512K_ENTRIES 4 /* P8 only */
/* PSI Host Bridge Control Register
*
* note: TCE_ENABLE moved to the new PSIHB_PHBSCR on P8 but is
* the same bit position
*/
#define PSIHB_CR 0x20
#define PSIHB_CR_FSP_CMD_ENABLE PPC_BIT(0)
#define PSIHB_CR_FSP_MMIO_ENABLE PPC_BIT(1)
#define PSIHB_CR_TCE_ENABLE PPC_BIT(2) /* P7 only */
#define PSIHB_CR_FSP_IRQ_ENABLE PPC_BIT(3)
#define PSIHB_CR_FSP_ERR_RSP_ENABLE PPC_BIT(4)
#define PSIHB_CR_PSI_LINK_ENABLE PPC_BIT(5)
#define PSIHB_CR_FSP_RESET PPC_BIT(6)
#define PSIHB_CR_PSIHB_RESET PPC_BIT(7)
#define PSIHB_CR_PSI_IRQ PPC_BIT(16) /* PSIHB interrupt */
#define PSIHB_CR_FSP_IRQ PPC_BIT(17) /* FSP interrupt */
#define PSIHB_CR_FSP_LINK_ACTIVE PPC_BIT(18) /* FSP link active */
/* Error conditions in the GXHB */
#define PSIHB_CR_PSI_ERROR PPC_BIT(32) /* PSI error */
#define PSIHB_CR_PSI_LINK_INACTIVE PPC_BIT(33) /* Link inactive */
#define PSIHB_CR_FSP_ACK_TIMEOUT PPC_BIT(34) /* FSP ack timeout */
#define PSIHB_CR_MMIO_LOAD_TIMEOUT PPC_BIT(35) /* MMIO load timeout */
#define PSIHB_CR_MMIO_LENGTH_ERROR PPC_BIT(36) /* MMIO length error */
#define PSIHB_CR_MMIO_ADDRESS_ERROR PPC_BIT(37) /* MMIO address error */
#define PSIHB_CR_MMIO_TYPE_ERROR PPC_BIT(38) /* MMIO type error */
#define PSIHB_CR_UE PPC_BIT(39) /* UE detected */
#define PSIHB_CR_PARITY_ERROR PPC_BIT(40) /* Parity error */
#define PSIHB_CR_SYNC_ERR_ALERT1 PPC_BIT(41) /* Sync alert 1 */
#define PSIHB_CR_SYNC_ERR_ALERT2 PPC_BIT(42) /* Sync alert 2 */
#define PSIHB_CR_FSP_COMMAND_ERROR PPC_BIT(43) /* FSP cmd error */
/* PSI Status / Error Mask Register */
#define PSIHB_SEMR 0x28
/* XIVR and BUID used for PSI interrupts on P7 */
#define PSIHB_XIVR 0x30
/* XIVR and BUID used for PSI interrupts on P8 */
#define PSIHB_XIVR_FSP 0x30
#define PSIHB_XIVR_OCC 0x60
#define PSIHB_XIVR_FSI 0x68
#define PSIHB_XIVR_LPC 0x70
#define PSIHB_XIVR_LOCAL_ERR 0x78
#define PSIHB_XIVR_HOST_ERR 0x80
#define PSIHB_ISRN 0x88
#define PSIHB_ISRN_COMP PPC_BITMASK(0,18)
#define PSIHB_ISRN_IRQ_MUX PPC_BIT(28)
#define PSIHB_ISRN_IRQ_RESET PPC_BIT(29)
#define PSIHB_ISRN_DOWNSTREAM_EN PPC_BIT(30)
#define PSIHB_ISRN_UPSTREAM_EN PPC_BIT(31)
#define PSIHB_ISRN_MASK PPC_BITMASK(32,50)
#define PSIHB_IRQ_STATUS 0x58
#define PSIHB_IRQ_STAT_OCC PPC_BIT(27)
#define PSIHB_IRQ_STAT_FSI PPC_BIT(28)
#define PSIHB_IRQ_STAT_LPC PPC_BIT(29)
#define PSIHB_IRQ_STAT_LOCAL_ERR PPC_BIT(30)
#define PSIHB_IRQ_STAT_HOST_ERR PPC_BIT(31)
/* Secure version of CR for P8 (TCE enable bit) */
#define PSIHB_PHBSCR 0x90
/*
* PSI Host Bridge Registers (XSCOM)
*/
#define PSIHB_XSCOM_P7_HBBAR 0x9
#define PSIHB_XSCOM_P7_HBBAR_EN PPC_BIT(28)
#define PSIHB_XSCOM_P7_HBCSR 0xd
#define PSIHB_XSCOM_P7_HBCSR_SET 0x11
#define PSIHB_XSCOM_P7_HBCSR_CLR 0x12
#define PSIHB_XSCOM_P7_HBSCR_FSP_IRQ PPC_BIT(13)
#define PSIHB_XSCOM_P8_BASE 0xa
#define PSIHB_XSCOM_P8_HBBAR_EN PPC_BIT(63)
#define PSIHB_XSCOM_P8_HBCSR 0xe
#define PSIHB_XSCOM_P8_HBCSR_SET 0x12
#define PSIHB_XSCOM_P8_HBCSR_CLR 0x13
#define PSIHB_XSCOM_P8_HBSCR_FSP_IRQ PPC_BIT(17)
/*
* Layout of the PSI DMA address space
*
* On P7, we instanciate a TCE table of 16K TCEs mapping 64M
*
* On P8, we use a larger mapping of 256K TCEs which provides
* us with a 1G window in order to fit the trace buffers
*
* Currently we have:
*
* - 4x256K serial areas (each divided in 2: in and out buffers)
* - 1M region for inbound buffers
* - 2M region for generic data fetches
*/
#define PSI_DMA_SER0_BASE 0x00000000
#define PSI_DMA_SER0_SIZE 0x00040000
#define PSI_DMA_SER1_BASE 0x00040000
#define PSI_DMA_SER1_SIZE 0x00040000
#define PSI_DMA_SER2_BASE 0x00080000
#define PSI_DMA_SER2_SIZE 0x00040000
#define PSI_DMA_SER3_BASE 0x000c0000
#define PSI_DMA_SER3_SIZE 0x00040000
#define PSI_DMA_INBOUND_BUF 0x00100000
#define PSI_DMA_INBOUND_SIZE 0x00100000
#define PSI_DMA_FETCH 0x00200000
#define PSI_DMA_FETCH_SIZE 0x00800000
#define PSI_DMA_NVRAM_BODY 0x00a00000
#define PSI_DMA_NVRAM_BODY_SZ 0x00100000
#define PSI_DMA_NVRAM_TRIPL 0x00b00000
#define PSI_DMA_NVRAM_TRIPL_SZ 0x00001000
#define PSI_DMA_OP_PANEL_MISC 0x00b01000
#define PSI_DMA_OP_PANEL_SIZE 0x00001000
#define PSI_DMA_GET_SYSPARAM 0x00b02000
#define PSI_DMA_GET_SYSPARAM_SZ 0x00001000
#define PSI_DMA_SET_SYSPARAM 0x00b03000
#define PSI_DMA_SET_SYSPARAM_SZ 0x00001000
#define PSI_DMA_ERRLOG_READ_BUF 0x00b04000
#define PSI_DMA_ERRLOG_READ_BUF_SZ 0x00040000
#define PSI_DMA_ELOG_PANIC_WRITE_BUF 0x00b44000
#define PSI_DMA_ELOG_PANIC_WRITE_BUF_SZ 0x00010000
#define PSI_DMA_ERRLOG_WRITE_BUF 0x00b54000
#define PSI_DMA_ERRLOG_WRITE_BUF_SZ 0x00040000
#define PSI_DMA_ELOG_WR_TO_HOST_BUF 0x00b94000
#define PSI_DMA_ELOG_WR_TO_HOST_BUF_SZ 0x00010000
#define PSI_DMA_HBRT_LOG_WRITE_BUF 0x00ba4000
#define PSI_DMA_HBRT_LOG_WRITE_BUF_SZ 0x00001000
#define PSI_DMA_CODE_UPD 0x00c04000
#define PSI_DMA_CODE_UPD_SIZE 0x01001000
#define PSI_DMA_DUMP_DATA 0x01c05000
#define PSI_DMA_DUMP_DATA_SIZE 0x00500000
#define PSI_DMA_SENSOR_BUF 0x02105000
#define PSI_DMA_SENSOR_BUF_SZ 0x00080000
#define PSI_DMA_MDST_TABLE 0x02185000
#define PSI_DMA_MDST_TABLE_SIZE 0x00001000
#define PSI_DMA_HYP_DUMP 0x02186000
#define PSI_DMA_HYP_DUMP_SIZE 0x01000000
#define PSI_DMA_PCIE_INVENTORY 0x03186000
#define PSI_DMA_PCIE_INVENTORY_SIZE 0x00010000
#define PSI_DMA_LED_BUF 0x03196000
#define PSI_DMA_LED_BUF_SZ 0x00001000
#define PSI_DMA_LOC_COD_BUF 0x03197000
#define PSI_DMA_LOC_COD_BUF_SZ 0x00008000
#define PSI_DMA_MEMCONS 0x0319f000
#define PSI_DMA_MEMCONS_SZ 0x00001000
#define PSI_DMA_LOG_BUF 0x03200000
#define PSI_DMA_LOG_BUF_SZ 0x00100000 /* INMEM_CON_LEN */
/* P8 only mappings */
#define PSI_DMA_TRACE_BASE 0x04000000
struct psi {
struct list_node list;
uint64_t xscom_base;
void *regs;
unsigned int chip_id;
unsigned int interrupt;
bool working;
bool active;
};
extern void psi_set_link_polling(bool active);
extern struct psi *first_psi;
extern void psi_init(void);
extern struct psi *psi_find_link(uint32_t chip_id);
extern void psi_init_for_fsp(struct psi *psi);
extern void psi_disable_link(struct psi *psi);
extern void psi_reset_fsp(struct psi *psi);
extern bool psi_check_link_active(struct psi *psi);
extern bool psi_poll_fsp_interrupt(struct psi *psi);
/* Interrupts */
extern void psi_irq_reset(void);
extern void psi_enable_fsp_interrupt(struct psi *psi);
extern void psi_fsp_link_in_use(struct psi *psi);
/*
* Must be called by the platform probe() function as the policy
* is established before platform.init
*
* This defines whether the external interrupt should be passed to
* the OS or handled locally in skiboot. Return true for skiboot
* handling. Default if not called is Linux.
*/
#define EXTERNAL_IRQ_POLICY_LINUX false
#define EXTERNAL_IRQ_POLICY_SKIBOOT true
extern void psi_set_external_irq_policy(bool policy);
#endif /* __PSI_H */
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