Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 6461b446 authored by Shannon Nelson's avatar Shannon Nelson Committed by David S. Miller
Browse files

ionic: Add interrupts and doorbells 



The ionic interrupt model is based on interrupt control blocks
accessed through the PCI BAR.  Doorbell registers are used by
the driver to signal to the NIC that requests are waiting on
the message queues.  Interrupts are used by the NIC to signal
to the driver that answers are waiting on the completion queues.

Signed-off-by: default avatarShannon Nelson <snelson@pensando.io>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1a58e196

drivers/net/ethernet/pensando/ionic/ionic.h

+3 −0
Original line number Diff line number Diff line
@@ -4,6 +4,8 @@ 
#ifndef _IONIC_H_

#define _IONIC_H_



struct ionic_lif;



#include "ionic_if.h"

#include "ionic_dev.h"

#include "ionic_devlink.h"
@@ -39,6 +41,7 @@ struct ionic { 
	unsigned int nrxqs_per_lif;

	DECLARE_BITMAP(lifbits, IONIC_LIFS_MAX);

	unsigned int nintrs;

	DECLARE_BITMAP(intrs, IONIC_INTR_CTRL_REGS_MAX);

};



int ionic_dev_cmd_wait(struct ionic *ionic, unsigned long max_wait);

drivers/net/ethernet/pensando/ionic/ionic_bus.h

+2 −0
Original line number Diff line number Diff line
@@ -9,5 +9,7 @@ int ionic_bus_alloc_irq_vectors(struct ionic *ionic, unsigned int nintrs); 
void ionic_bus_free_irq_vectors(struct ionic *ionic);

int ionic_bus_register_driver(void);

void ionic_bus_unregister_driver(void);

void __iomem *ionic_bus_map_dbpage(struct ionic *ionic, int page_num);

void ionic_bus_unmap_dbpage(struct ionic *ionic, void __iomem *page);



#endif /* _IONIC_BUS_H_ */

drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c

+12 −0
Original line number Diff line number Diff line
@@ -87,6 +87,18 @@ static void ionic_unmap_bars(struct ionic *ionic) 
	}

}



void __iomem *ionic_bus_map_dbpage(struct ionic *ionic, int page_num)

{

	return pci_iomap_range(ionic->pdev,

			       ionic->bars[IONIC_PCI_BAR_DBELL].res_index,

			       (u64)page_num << PAGE_SHIFT, PAGE_SIZE);

}



void ionic_bus_unmap_dbpage(struct ionic *ionic, void __iomem *page)

{

	iounmap(page);

}



static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)

{

	struct device *dev = &pdev->dev;

drivers/net/ethernet/pensando/ionic/ionic_dev.c

+6 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ 
#include <linux/etherdevice.h>

#include "ionic.h"

#include "ionic_dev.h"

#include "ionic_lif.h"



void ionic_init_devinfo(struct ionic *ionic)

{
@@ -260,3 +261,8 @@ void ionic_dev_cmd_lif_reset(struct ionic_dev *idev, u16 lif_index) 


	ionic_dev_cmd_go(idev, &cmd);

}



int ionic_db_page_num(struct ionic_lif *lif, int pid)

{

	return (lif->hw_index * lif->dbid_count) + pid;

}

drivers/net/ethernet/pensando/ionic/ionic_dev.h

+22 −0
Original line number Diff line number Diff line
@@ -126,8 +126,28 @@ struct ionic_dev { 
	struct ionic_devinfo dev_info;

};



#define INTR_INDEX_NOT_ASSIGNED		-1

#define INTR_NAME_MAX_SZ		32



struct ionic_intr_info {

	char name[INTR_NAME_MAX_SZ];

	unsigned int index;

	unsigned int vector;

	u64 rearm_count;

	unsigned int cpu;

	cpumask_t affinity_mask;

};



struct ionic;



static inline void ionic_intr_init(struct ionic_dev *idev,

				   struct ionic_intr_info *intr,

				   unsigned long index)

{

	ionic_intr_clean(idev->intr_ctrl, index);

	intr->index = index;

}



void ionic_init_devinfo(struct ionic *ionic);

int ionic_dev_setup(struct ionic *ionic);

void ionic_dev_teardown(struct ionic *ionic);
@@ -155,4 +175,6 @@ void ionic_dev_cmd_lif_init(struct ionic_dev *idev, u16 lif_index, 
			    dma_addr_t addr);

void ionic_dev_cmd_lif_reset(struct ionic_dev *idev, u16 lif_index);



int ionic_db_page_num(struct ionic_lif *lif, int pid);



#endif /* _IONIC_DEV_H_ */