604158ade0
Add description for bfa driver module parameters. Signed-off-by: Jing Huang <huangj@brocade.com> Signed-off-by: James Bottomley <James.Bottomley@suse.de>
222 lines
5.2 KiB
C
222 lines
5.2 KiB
C
/*
|
|
* Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
|
|
* All rights reserved
|
|
* www.brocade.com
|
|
*
|
|
* Linux driver for Brocade Fibre Channel Host Bus Adapter.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License (GPL) Version 2 as
|
|
* published by the Free Software Foundation
|
|
*
|
|
* This program is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*/
|
|
|
|
#include "bfad_drv.h"
|
|
#include "bfad_trcmod.h"
|
|
|
|
BFA_TRC_FILE(LDRV, INTR);
|
|
|
|
/**
|
|
* bfa_isr BFA driver interrupt functions
|
|
*/
|
|
static int msix_disable_cb;
|
|
static int msix_disable_ct;
|
|
module_param(msix_disable_cb, int, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(msix_disable_cb, "Disable MSIX for Brocade-415/425/815/825"
|
|
" cards, default=0, Range[false:0|true:1]");
|
|
module_param(msix_disable_ct, int, S_IRUGO | S_IWUSR);
|
|
MODULE_PARM_DESC(msix_disable_ct, "Disable MSIX for Brocade-1010/1020/804"
|
|
" cards, default=0, Range[false:0|true:1]");
|
|
/**
|
|
* Line based interrupt handler.
|
|
*/
|
|
static irqreturn_t
|
|
bfad_intx(int irq, void *dev_id)
|
|
{
|
|
struct bfad_s *bfad = dev_id;
|
|
struct list_head doneq;
|
|
unsigned long flags;
|
|
bfa_boolean_t rc;
|
|
|
|
spin_lock_irqsave(&bfad->bfad_lock, flags);
|
|
rc = bfa_intx(&bfad->bfa);
|
|
if (!rc) {
|
|
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
bfa_comp_deq(&bfad->bfa, &doneq);
|
|
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
|
|
|
|
if (!list_empty(&doneq)) {
|
|
bfa_comp_process(&bfad->bfa, &doneq);
|
|
|
|
spin_lock_irqsave(&bfad->bfad_lock, flags);
|
|
bfa_comp_free(&bfad->bfa, &doneq);
|
|
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
|
|
bfa_trc_fp(bfad, irq);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
static irqreturn_t
|
|
bfad_msix(int irq, void *dev_id)
|
|
{
|
|
struct bfad_msix_s *vec = dev_id;
|
|
struct bfad_s *bfad = vec->bfad;
|
|
struct list_head doneq;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&bfad->bfad_lock, flags);
|
|
|
|
bfa_msix(&bfad->bfa, vec->msix.entry);
|
|
bfa_comp_deq(&bfad->bfa, &doneq);
|
|
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
|
|
|
|
if (!list_empty(&doneq)) {
|
|
bfa_comp_process(&bfad->bfa, &doneq);
|
|
|
|
spin_lock_irqsave(&bfad->bfad_lock, flags);
|
|
bfa_comp_free(&bfad->bfa, &doneq);
|
|
spin_unlock_irqrestore(&bfad->bfad_lock, flags);
|
|
}
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
/**
|
|
* Initialize the MSIX entry table.
|
|
*/
|
|
static void
|
|
bfad_init_msix_entry(struct bfad_s *bfad, struct msix_entry *msix_entries,
|
|
int mask, int max_bit)
|
|
{
|
|
int i;
|
|
int match = 0x00000001;
|
|
|
|
for (i = 0, bfad->nvec = 0; i < MAX_MSIX_ENTRY; i++) {
|
|
if (mask & match) {
|
|
bfad->msix_tab[bfad->nvec].msix.entry = i;
|
|
bfad->msix_tab[bfad->nvec].bfad = bfad;
|
|
msix_entries[bfad->nvec].entry = i;
|
|
bfad->nvec++;
|
|
}
|
|
|
|
match <<= 1;
|
|
}
|
|
|
|
}
|
|
|
|
int
|
|
bfad_install_msix_handler(struct bfad_s *bfad)
|
|
{
|
|
int i, error = 0;
|
|
|
|
for (i = 0; i < bfad->nvec; i++) {
|
|
error = request_irq(bfad->msix_tab[i].msix.vector,
|
|
(irq_handler_t) bfad_msix, 0,
|
|
BFAD_DRIVER_NAME, &bfad->msix_tab[i]);
|
|
bfa_trc(bfad, i);
|
|
bfa_trc(bfad, bfad->msix_tab[i].msix.vector);
|
|
if (error) {
|
|
int j;
|
|
|
|
for (j = 0; j < i; j++)
|
|
free_irq(bfad->msix_tab[j].msix.vector,
|
|
&bfad->msix_tab[j]);
|
|
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Setup MSIX based interrupt.
|
|
*/
|
|
int
|
|
bfad_setup_intr(struct bfad_s *bfad)
|
|
{
|
|
int error = 0;
|
|
u32 mask = 0, i, num_bit = 0, max_bit = 0;
|
|
struct msix_entry msix_entries[MAX_MSIX_ENTRY];
|
|
struct pci_dev *pdev = bfad->pcidev;
|
|
|
|
/* Call BFA to get the msix map for this PCI function. */
|
|
bfa_msix_getvecs(&bfad->bfa, &mask, &num_bit, &max_bit);
|
|
|
|
/* Set up the msix entry table */
|
|
bfad_init_msix_entry(bfad, msix_entries, mask, max_bit);
|
|
|
|
if ((bfa_asic_id_ct(pdev->device) && !msix_disable_ct) ||
|
|
(!bfa_asic_id_ct(pdev->device) && !msix_disable_cb)) {
|
|
|
|
error = pci_enable_msix(bfad->pcidev, msix_entries, bfad->nvec);
|
|
if (error) {
|
|
/*
|
|
* Only error number of vector is available.
|
|
* We don't have a mechanism to map multiple
|
|
* interrupts into one vector, so even if we
|
|
* can try to request less vectors, we don't
|
|
* know how to associate interrupt events to
|
|
* vectors. Linux doesn't dupicate vectors
|
|
* in the MSIX table for this case.
|
|
*/
|
|
|
|
printk(KERN_WARNING "bfad%d: "
|
|
"pci_enable_msix failed (%d),"
|
|
" use line based.\n", bfad->inst_no, error);
|
|
|
|
goto line_based;
|
|
}
|
|
|
|
/* Save the vectors */
|
|
for (i = 0; i < bfad->nvec; i++) {
|
|
bfa_trc(bfad, msix_entries[i].vector);
|
|
bfad->msix_tab[i].msix.vector = msix_entries[i].vector;
|
|
}
|
|
|
|
bfa_msix_init(&bfad->bfa, bfad->nvec);
|
|
|
|
bfad->bfad_flags |= BFAD_MSIX_ON;
|
|
|
|
return error;
|
|
}
|
|
|
|
line_based:
|
|
error = 0;
|
|
if (request_irq
|
|
(bfad->pcidev->irq, (irq_handler_t) bfad_intx, BFAD_IRQ_FLAGS,
|
|
BFAD_DRIVER_NAME, bfad) != 0) {
|
|
/* Enable interrupt handler failed */
|
|
return 1;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
void
|
|
bfad_remove_intr(struct bfad_s *bfad)
|
|
{
|
|
int i;
|
|
|
|
if (bfad->bfad_flags & BFAD_MSIX_ON) {
|
|
for (i = 0; i < bfad->nvec; i++)
|
|
free_irq(bfad->msix_tab[i].msix.vector,
|
|
&bfad->msix_tab[i]);
|
|
|
|
pci_disable_msix(bfad->pcidev);
|
|
bfad->bfad_flags &= ~BFAD_MSIX_ON;
|
|
} else {
|
|
free_irq(bfad->pcidev->irq, bfad);
|
|
}
|
|
}
|
|
|
|
|