Commit 889976f8 authored by Mao Minkai's avatar Mao Minkai Committed by guzitao
Browse files

sw64: add MSI support 

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I8Y8CY



--------------------------------

Add basic MSI support for SW64.

Signed-off-by: default avatarMao Minkai <maominkai@wxiat.com>
Reviewed-by: default avatarHe Sheng <hesheng@wxiat.com>
Signed-off-by: default avatarGu Zitao <guzitao@wxiat.com>
parent 0976b157

arch/sw_64/include/asm/msi.h

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/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _ASM_SW64_MSI_H

#define _ASM_SW64_MSI_H



#include <asm/sw64io.h>



#define NR_VECTORS NR_IRQS

#define NR_IRQ_VECTORS NR_IRQS



#define AUTO_ASSIGN		0



#define LAST_DEVICE_VECTOR	31



#define MSI_OFFSET		0x44



#define NUM_MSI_IRQS		256



#define PERCPU_MSI_IRQS		256



#define VT_MSIX_MSG_ADDR	(0x8000fee00000UL)

#define VT_MSIX_ADDR_DEST_ID_SHIFT	12

#define VT_MSIX_ADDR_DEST_ID_MASK	(0xff << VT_MSIX_ADDR_DEST_ID_SHIFT)

#define VT_MSIX_ADDR_DEST_ID(dest)	\

	(((dest) << VT_MSIX_ADDR_DEST_ID_SHIFT) & VT_MSIX_ADDR_DEST_ID_MASK)





#ifdef CONFIG_PCI_MSI

extern void vt_sw64_vector_free_irqs(unsigned int virq, unsigned int nr_irqs);

extern int sw64_setup_vt_msi_irqs(struct pci_dev *dev, int nvec, int type);

extern bool find_free_cpu_vector(const struct cpumask *search_mask,

				 int *found_cpu, int *found_vector);

extern int msi_compose_msg(unsigned int irq, struct msi_msg *msg);

extern void sw64_irq_noop(struct irq_data *d);

extern struct irq_chip sw64_irq_chip;

extern void handle_pci_msi_interrupt(unsigned long type,

				     unsigned long vector,

				     unsigned long pci_msi1_addr);



#define MSI_ADDR_BASE_HI	0

#define MSI_ADDR_BASE_LO	0x91abc0



#define	MSI_ADDR_SHIFT		20

#define	MSI_ADDR_DEST_ID_SHIFT	10



struct sw64_msi_chip_data {

	spinlock_t cdata_lock;

	union {

		unsigned long msi_config;

		unsigned long msiaddr;

	};

	unsigned long rc_node;

	unsigned long rc_index;

	unsigned int msi_config_index;

	unsigned int dst_cpu;

	unsigned int vector;

	unsigned int prev_cpu;

	unsigned int prev_vector;

	unsigned int multi_msi;

	bool move_in_progress;

};



static inline int rcid_to_msicid(int rcid)

{

	int msicid = 0;



	msicid |= (rcid_to_domain_id(rcid) << 7);

	msicid |= (rcid_to_thread_id(rcid) << 6);

	msicid |= (rcid_to_core_id(rcid) << 0);



	return msicid;

}



extern void arch_init_msi_domain(struct irq_domain *domain);

enum irq_alloc_type {

	IRQ_ALLOC_TYPE_MSI,

	IRQ_ALLOC_TYPE_MSIX,

	IRQ_ALLOC_TYPE_INTX,

};

struct irq_alloc_info {

	struct msi_desc         *desc;

	enum irq_alloc_type	type;

	struct pci_dev		*msi_dev;

	irq_hw_number_t         hwirq;

};

typedef struct irq_alloc_info msi_alloc_info_t;

#else /* !CONFIG_PCI_MSI */

static inline void handle_pci_msi_interrupt(unsigned long type,

			      unsigned long vector, unsigned long pci_msi1_addr)

{

	pr_warn("SW arch disable CONFIG_PCI_MSI option.\n");

}

#endif /* CONFIG_PCI_MSI */

#endif /* _ASM_SW64_MSI_H */

arch/sw_64/pci/msi.c

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// SPDX-License-Identifier: GPL-2.0

#include <linux/module.h>

#include <linux/irq.h>

#include <linux/msi.h>

#include <asm/sw64io.h>



int msi_compose_msg(unsigned int irq, struct msi_msg *msg)

{

	msg->address_hi = (unsigned int)(MSIX_MSG_ADDR >> 32);

	msg->address_lo = (unsigned int)(MSIX_MSG_ADDR & 0xffffffff);

	msg->data = irq;

	return irq;

}



void sw64_irq_noop(struct irq_data *d)

{

}



void arch_teardown_msi_irq(unsigned int irq)

{

}