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linux-pinenote/arch/mips/include/asm/netlogic/xlp-hal/pic.h
Ganesan Ramalingam d66f3f0e10 MIPS: Add MSI support for XLP9XX 
In XLP9XX, the interrupt routing table for MSI-X has been moved to the
PCIe controller's config space from PIC. There are also 32 MSI-X
interrupts available per link on XLP9XX.

Update XLP MSI/MSI-X code to handle this.

Signed-off-by: Ganesan Ramalingam <ganesanr@broadcom.com>
Signed-off-by: Jayachandran C <jchandra@broadcom.com>
Cc: g@linux-mips.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/6912/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2014-05-30 16:51:02 +02:00

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/*
* Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights
* reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the NetLogic
* license below:
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY NETLOGIC ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _NLM_HAL_PIC_H
#define _NLM_HAL_PIC_H
/* PIC Specific registers */
#define PIC_CTRL 0x00
/* PIC control register defines */
#define PIC_CTRL_ITV 32 /* interrupt timeout value */
#define PIC_CTRL_ICI 19 /* ICI interrupt timeout enable */
#define PIC_CTRL_ITE 18 /* interrupt timeout enable */
#define PIC_CTRL_STE 10 /* system timer interrupt enable */
#define PIC_CTRL_WWR1 8 /* watchdog 1 wraparound count for reset */
#define PIC_CTRL_WWR0 6 /* watchdog 0 wraparound count for reset */
#define PIC_CTRL_WWN1 4 /* watchdog 1 wraparound count for NMI */
#define PIC_CTRL_WWN0 2 /* watchdog 0 wraparound count for NMI */
#define PIC_CTRL_WTE 0 /* watchdog timer enable */
/* PIC Status register defines */
#define PIC_ICI_STATUS 33 /* ICI interrupt timeout status */
#define PIC_ITE_STATUS 32 /* interrupt timeout status */
#define PIC_STS_STATUS 4 /* System timer interrupt status */
#define PIC_WNS_STATUS 2 /* NMI status for watchdog timers */
#define PIC_WIS_STATUS 0 /* Interrupt status for watchdog timers */
/* PIC IPI control register offsets */
#define PIC_IPICTRL_NMI 32
#define PIC_IPICTRL_RIV 20 /* received interrupt vector */
#define PIC_IPICTRL_IDB 16 /* interrupt destination base */
#define PIC_IPICTRL_DTE 0 /* interrupt destination thread enables */
/* PIC IRT register offsets */
#define PIC_IRT_ENABLE 31
#define PIC_IRT_NMI 29
#define PIC_IRT_SCH 28 /* Scheduling scheme */
#define PIC_IRT_RVEC 20 /* Interrupt receive vectors */
#define PIC_IRT_DT 19 /* Destination type */
#define PIC_IRT_DB 16 /* Destination base */
#define PIC_IRT_DTE 0 /* Destination thread enables */
#define PIC_BYTESWAP 0x02
#define PIC_STATUS 0x04
#define PIC_INTR_TIMEOUT 0x06
#define PIC_ICI0_INTR_TIMEOUT 0x08
#define PIC_ICI1_INTR_TIMEOUT 0x0a
#define PIC_ICI2_INTR_TIMEOUT 0x0c
#define PIC_IPI_CTL 0x0e
#define PIC_INT_ACK 0x10
#define PIC_INT_PENDING0 0x12
#define PIC_INT_PENDING1 0x14
#define PIC_INT_PENDING2 0x16
#define PIC_WDOG0_MAXVAL 0x18
#define PIC_WDOG0_COUNT 0x1a
#define PIC_WDOG0_ENABLE0 0x1c
#define PIC_WDOG0_ENABLE1 0x1e
#define PIC_WDOG0_BEATCMD 0x20
#define PIC_WDOG0_BEAT0 0x22
#define PIC_WDOG0_BEAT1 0x24
#define PIC_WDOG1_MAXVAL 0x26
#define PIC_WDOG1_COUNT 0x28
#define PIC_WDOG1_ENABLE0 0x2a
#define PIC_WDOG1_ENABLE1 0x2c
#define PIC_WDOG1_BEATCMD 0x2e
#define PIC_WDOG1_BEAT0 0x30
#define PIC_WDOG1_BEAT1 0x32
#define PIC_WDOG_MAXVAL(i) (PIC_WDOG0_MAXVAL + ((i) ? 7 : 0))
#define PIC_WDOG_COUNT(i) (PIC_WDOG0_COUNT + ((i) ? 7 : 0))
#define PIC_WDOG_ENABLE0(i) (PIC_WDOG0_ENABLE0 + ((i) ? 7 : 0))
#define PIC_WDOG_ENABLE1(i) (PIC_WDOG0_ENABLE1 + ((i) ? 7 : 0))
#define PIC_WDOG_BEATCMD(i) (PIC_WDOG0_BEATCMD + ((i) ? 7 : 0))
#define PIC_WDOG_BEAT0(i) (PIC_WDOG0_BEAT0 + ((i) ? 7 : 0))
#define PIC_WDOG_BEAT1(i) (PIC_WDOG0_BEAT1 + ((i) ? 7 : 0))
#define PIC_TIMER0_MAXVAL 0x34
#define PIC_TIMER1_MAXVAL 0x36
#define PIC_TIMER2_MAXVAL 0x38
#define PIC_TIMER3_MAXVAL 0x3a
#define PIC_TIMER4_MAXVAL 0x3c
#define PIC_TIMER5_MAXVAL 0x3e
#define PIC_TIMER6_MAXVAL 0x40
#define PIC_TIMER7_MAXVAL 0x42
#define PIC_TIMER_MAXVAL(i) (PIC_TIMER0_MAXVAL + ((i) * 2))
#define PIC_TIMER0_COUNT 0x44
#define PIC_TIMER1_COUNT 0x46
#define PIC_TIMER2_COUNT 0x48
#define PIC_TIMER3_COUNT 0x4a
#define PIC_TIMER4_COUNT 0x4c
#define PIC_TIMER5_COUNT 0x4e
#define PIC_TIMER6_COUNT 0x50
#define PIC_TIMER7_COUNT 0x52
#define PIC_TIMER_COUNT(i) (PIC_TIMER0_COUNT + ((i) * 2))
#define PIC_ITE0_N0_N1 0x54
#define PIC_ITE1_N0_N1 0x58
#define PIC_ITE2_N0_N1 0x5c
#define PIC_ITE3_N0_N1 0x60
#define PIC_ITE4_N0_N1 0x64
#define PIC_ITE5_N0_N1 0x68
#define PIC_ITE6_N0_N1 0x6c
#define PIC_ITE7_N0_N1 0x70
#define PIC_ITE_N0_N1(i) (PIC_ITE0_N0_N1 + ((i) * 4))
#define PIC_ITE0_N2_N3 0x56
#define PIC_ITE1_N2_N3 0x5a
#define PIC_ITE2_N2_N3 0x5e
#define PIC_ITE3_N2_N3 0x62
#define PIC_ITE4_N2_N3 0x66
#define PIC_ITE5_N2_N3 0x6a
#define PIC_ITE6_N2_N3 0x6e
#define PIC_ITE7_N2_N3 0x72
#define PIC_ITE_N2_N3(i) (PIC_ITE0_N2_N3 + ((i) * 4))
#define PIC_IRT0 0x74
#define PIC_IRT(i) (PIC_IRT0 + ((i) * 2))
#define PIC_9XX_PENDING_0 0x6
#define PIC_9XX_PENDING_1 0x8
#define PIC_9XX_PENDING_2 0xa
#define PIC_9XX_PENDING_3 0xc
#define PIC_9XX_IRT0 0x1c0
#define PIC_9XX_IRT(i) (PIC_9XX_IRT0 + ((i) * 2))
/*
* IRT Map
*/
#define PIC_NUM_IRTS 160
#define PIC_9XX_NUM_IRTS 256
#define PIC_IRT_WD_0_INDEX 0
#define PIC_IRT_WD_1_INDEX 1
#define PIC_IRT_WD_NMI_0_INDEX 2
#define PIC_IRT_WD_NMI_1_INDEX 3
#define PIC_IRT_TIMER_0_INDEX 4
#define PIC_IRT_TIMER_1_INDEX 5
#define PIC_IRT_TIMER_2_INDEX 6
#define PIC_IRT_TIMER_3_INDEX 7
#define PIC_IRT_TIMER_4_INDEX 8
#define PIC_IRT_TIMER_5_INDEX 9
#define PIC_IRT_TIMER_6_INDEX 10
#define PIC_IRT_TIMER_7_INDEX 11
#define PIC_IRT_CLOCK_INDEX PIC_IRT_TIMER_7_INDEX
#define PIC_IRT_TIMER_INDEX(num) ((num) + PIC_IRT_TIMER_0_INDEX)
/* 11 and 12 */
#define PIC_NUM_MSG_Q_IRTS 32
#define PIC_IRT_MSG_Q0_INDEX 12
#define PIC_IRT_MSG_Q_INDEX(qid) ((qid) + PIC_IRT_MSG_Q0_INDEX)
/* 12 to 43 */
#define PIC_IRT_MSG_0_INDEX 44
#define PIC_IRT_MSG_1_INDEX 45
/* 44 and 45 */
#define PIC_NUM_PCIE_MSIX_IRTS 32
#define PIC_IRT_PCIE_MSIX_0_INDEX 46
#define PIC_IRT_PCIE_MSIX_INDEX(num) ((num) + PIC_IRT_PCIE_MSIX_0_INDEX)
/* 46 to 77 */
#define PIC_NUM_PCIE_LINK_IRTS 4
#define PIC_IRT_PCIE_LINK_0_INDEX 78
#define PIC_IRT_PCIE_LINK_1_INDEX 79
#define PIC_IRT_PCIE_LINK_2_INDEX 80
#define PIC_IRT_PCIE_LINK_3_INDEX 81
#define PIC_IRT_PCIE_LINK_INDEX(num) ((num) + PIC_IRT_PCIE_LINK_0_INDEX)
#define PIC_9XX_IRT_PCIE_LINK_0_INDEX 191
#define PIC_9XX_IRT_PCIE_LINK_INDEX(num) \
((num) + PIC_9XX_IRT_PCIE_LINK_0_INDEX)
#define PIC_CLOCK_TIMER 7
#if !defined(LOCORE) && !defined(__ASSEMBLY__)
/*
* Misc
*/
#define PIC_IRT_VALID 1
#define PIC_LOCAL_SCHEDULING 1
#define PIC_GLOBAL_SCHEDULING 0
#define nlm_read_pic_reg(b, r) nlm_read_reg64(b, r)
#define nlm_write_pic_reg(b, r, v) nlm_write_reg64(b, r, v)
#define nlm_get_pic_pcibase(node) nlm_pcicfg_base(cpu_is_xlp9xx() ? \
XLP9XX_IO_PIC_OFFSET(node) : XLP_IO_PIC_OFFSET(node))
#define nlm_get_pic_regbase(node) (nlm_get_pic_pcibase(node) + XLP_IO_PCI_HDRSZ)
/* We use PIC on node 0 as a timer */
#define pic_timer_freq() nlm_get_pic_frequency(0)
/* IRT and h/w interrupt routines */
static inline void
nlm_9xx_pic_write_irt(uint64_t base, int irt_num, int en, int nmi,
int sch, int vec, int dt, int db, int cpu)
{
uint64_t val;
val = (((uint64_t)en & 0x1) << 22) | ((nmi & 0x1) << 23) |
((0 /*mc*/) << 20) | ((vec & 0x3f) << 24) |
((dt & 0x1) << 21) | (0 /*ptr*/ << 16) |
(cpu & 0x3ff);
nlm_write_pic_reg(base, PIC_9XX_IRT(irt_num), val);
}
static inline void
nlm_pic_write_irt(uint64_t base, int irt_num, int en, int nmi,
int sch, int vec, int dt, int db, int dte)
{
uint64_t val;
val = (((uint64_t)en & 0x1) << 31) | ((nmi & 0x1) << 29) |
((sch & 0x1) << 28) | ((vec & 0x3f) << 20) |
((dt & 0x1) << 19) | ((db & 0x7) << 16) |
(dte & 0xffff);
nlm_write_pic_reg(base, PIC_IRT(irt_num), val);
}
static inline void
nlm_pic_write_irt_direct(uint64_t base, int irt_num, int en, int nmi,
int sch, int vec, int cpu)
{
if (cpu_is_xlp9xx())
nlm_9xx_pic_write_irt(base, irt_num, en, nmi, sch, vec,
1, 0, cpu);
else
nlm_pic_write_irt(base, irt_num, en, nmi, sch, vec, 1,
(cpu >> 4), /* thread group */
1 << (cpu & 0xf)); /* thread mask */
}
static inline uint64_t
nlm_pic_read_timer(uint64_t base, int timer)
{
return nlm_read_pic_reg(base, PIC_TIMER_COUNT(timer));
}
static inline uint32_t
nlm_pic_read_timer32(uint64_t base, int timer)
{
return (uint32_t)nlm_read_pic_reg(base, PIC_TIMER_COUNT(timer));
}
static inline void
nlm_pic_write_timer(uint64_t base, int timer, uint64_t value)
{
nlm_write_pic_reg(base, PIC_TIMER_COUNT(timer), value);
}
static inline void
nlm_pic_set_timer(uint64_t base, int timer, uint64_t value, int irq, int cpu)
{
uint64_t pic_ctrl = nlm_read_pic_reg(base, PIC_CTRL);
int en;
en = (irq > 0);
nlm_write_pic_reg(base, PIC_TIMER_MAXVAL(timer), value);
nlm_pic_write_irt_direct(base, PIC_IRT_TIMER_INDEX(timer),
en, 0, 0, irq, cpu);
/* enable the timer */
pic_ctrl |= (1 << (PIC_CTRL_STE + timer));
nlm_write_pic_reg(base, PIC_CTRL, pic_ctrl);
}
static inline void
nlm_pic_enable_irt(uint64_t base, int irt)
{
uint64_t reg;
if (cpu_is_xlp9xx()) {
reg = nlm_read_pic_reg(base, PIC_9XX_IRT(irt));
nlm_write_pic_reg(base, PIC_9XX_IRT(irt), reg | (1 << 22));
} else {
reg = nlm_read_pic_reg(base, PIC_IRT(irt));
nlm_write_pic_reg(base, PIC_IRT(irt), reg | (1u << 31));
}
}
static inline void
nlm_pic_disable_irt(uint64_t base, int irt)
{
uint64_t reg;
if (cpu_is_xlp9xx()) {
reg = nlm_read_pic_reg(base, PIC_9XX_IRT(irt));
reg &= ~((uint64_t)1 << 22);
nlm_write_pic_reg(base, PIC_9XX_IRT(irt), reg);
} else {
reg = nlm_read_pic_reg(base, PIC_IRT(irt));
reg &= ~((uint64_t)1 << 31);
nlm_write_pic_reg(base, PIC_IRT(irt), reg);
}
}
static inline void
nlm_pic_send_ipi(uint64_t base, int hwt, int irq, int nmi)
{
uint64_t ipi;
if (cpu_is_xlp9xx())
ipi = (nmi << 23) | (irq << 24) |
(0/*mcm*/ << 20) | (0/*ptr*/ << 16) | hwt;
else
ipi = ((uint64_t)nmi << 31) | (irq << 20) |
((hwt >> 4) << 16) | (1 << (hwt & 0xf));
nlm_write_pic_reg(base, PIC_IPI_CTL, ipi);
}
static inline void
nlm_pic_ack(uint64_t base, int irt_num)
{
nlm_write_pic_reg(base, PIC_INT_ACK, irt_num);
/* Ack the Status register for Watchdog & System timers */
if (irt_num < 12)
nlm_write_pic_reg(base, PIC_STATUS, (1 << irt_num));
}
static inline void
nlm_pic_init_irt(uint64_t base, int irt, int irq, int hwt, int en)
{
nlm_pic_write_irt_direct(base, irt, en, 0, 0, irq, hwt);
}
int nlm_irq_to_irt(int irq);
#endif /* __ASSEMBLY__ */
#endif /* _NLM_HAL_PIC_H */
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