UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

powerpc/fsl_msi: Add multiple MSI bank support 

Freescale QorIQ P4080 has three MSI banks and the original code
can not work well. This patch adds multiple MSI banks support for
Freescale processor.

Signed-off-by: Lan Chunhe-B25806 <b25806@freescale.com>
Signed-off-by: Roy Zang <tie-fei.zang@freescale.com>
Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
This commit is contained in:
Lan Chunhe-B25806 2010-03-15 06:38:33 +00:00 committed by Kumar Gala
parent b3df895aeb
commit 8081881327
1 changed files with 25 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

40
arch/powerpc/sysdev/fsl_msi.c
View File

@ -1,5 +1,5 @@
/*
* Copyright (C) 2007-2008 Freescale Semiconductor, Inc. All rights reserved.
* Copyright (C) 2007-2010 Freescale Semiconductor, Inc.
*
* Author: Tony Li <tony.li@freescale.com>
* Jason Jin <Jason.jin@freescale.com>
@ -29,7 +29,6 @@ struct fsl_msi_feature {
u32 msiir_offset;
};
static struct fsl_msi *fsl_msi;
static inline u32 fsl_msi_read(u32 __iomem *base, unsigned int reg)
{
@ -54,10 +53,12 @@ static struct irq_chip fsl_msi_chip = {
static int fsl_msi_host_map(struct irq_host *h, unsigned int virq,
irq_hw_number_t hw)
{
struct fsl_msi *msi_data = h->host_data;
struct irq_chip *chip = &fsl_msi_chip;
irq_to_desc(virq)->status |= IRQ_TYPE_EDGE_FALLING;
set_irq_chip_data(virq, msi_data);
set_irq_chip_and_handler(virq, chip, handle_edge_irq);
return 0;
@ -96,11 +97,12 @@ static int fsl_msi_check_device(struct pci_dev *pdev, int nvec, int type)
static void fsl_teardown_msi_irqs(struct pci_dev *pdev)
{
struct msi_desc *entry;
struct fsl_msi *msi_data = fsl_msi;
struct fsl_msi *msi_data;
list_for_each_entry(entry, &pdev->msi_list, list) {
if (entry->irq == NO_IRQ)
continue;
msi_data = get_irq_chip_data(entry->irq);
set_irq_msi(entry->irq, NULL);
msi_bitmap_free_hwirqs(&msi_data->bitmap,
virq_to_hw(entry->irq), 1);
@ -111,9 +113,10 @@ static void fsl_teardown_msi_irqs(struct pci_dev *pdev)
}
static void fsl_compose_msi_msg(struct pci_dev *pdev, int hwirq,
struct msi_msg *msg)
struct msi_msg *msg,
struct fsl_msi *fsl_msi_data)
{
struct fsl_msi *msi_data = fsl_msi;
struct fsl_msi *msi_data = fsl_msi_data;
struct pci_controller *hose = pci_bus_to_host(pdev->bus);
u32 base = 0;
@ -134,9 +137,11 @@ static int fsl_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
unsigned int virq;
struct msi_desc *entry;
struct msi_msg msg;
struct fsl_msi *msi_data = fsl_msi;
struct fsl_msi *msi_data;
list_for_each_entry(entry, &pdev->msi_list, list) {
msi_data = get_irq_chip_data(entry->irq);
hwirq = msi_bitmap_alloc_hwirqs(&msi_data->bitmap, 1);
if (hwirq < 0) {
rc = hwirq;
@ -156,7 +161,7 @@ static int fsl_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
}
set_irq_msi(virq, entry);
fsl_compose_msi_msg(pdev, hwirq, &msg);
fsl_compose_msi_msg(pdev, hwirq, &msg, msi_data);
write_msi_msg(virq, &msg);
}
return 0;
@ -168,7 +173,7 @@ out_free:
static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc)
{
unsigned int cascade_irq;
struct fsl_msi *msi_data = fsl_msi;
struct fsl_msi *msi_data = get_irq_chip_data(irq);
int msir_index = -1;
u32 msir_value = 0;
u32 intr_index;
@ -193,7 +198,7 @@ static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc)
cascade_irq = NO_IRQ;
desc->status |= IRQ_INPROGRESS;
switch (fsl_msi->feature & FSL_PIC_IP_MASK) {
switch (msi_data->feature & FSL_PIC_IP_MASK) {
case FSL_PIC_IP_MPIC:
msir_value = fsl_msi_read(msi_data->msi_regs,
msir_index * 0x10);
@ -307,15 +312,20 @@ static int __devinit fsl_of_msi_probe(struct of_device *dev,
if (virt_msir != NO_IRQ) {
set_irq_data(virt_msir, (void *)i);
set_irq_chained_handler(virt_msir, fsl_msi_cascade);
set_irq_chip_data(virt_msir, msi);
}
}
fsl_msi = msi;
WARN_ON(ppc_md.setup_msi_irqs);
ppc_md.setup_msi_irqs = fsl_setup_msi_irqs;
ppc_md.teardown_msi_irqs = fsl_teardown_msi_irqs;
ppc_md.msi_check_device = fsl_msi_check_device;
/* The multiple setting ppc_md.setup_msi_irqs will not harm things */
if (!ppc_md.setup_msi_irqs) {
ppc_md.setup_msi_irqs = fsl_setup_msi_irqs;
ppc_md.teardown_msi_irqs = fsl_teardown_msi_irqs;
ppc_md.msi_check_device = fsl_msi_check_device;
} else if (ppc_md.setup_msi_irqs != fsl_setup_msi_irqs) {
dev_err(&dev->dev, "Different MSI driver already installed!\n");
err = -ENODEV;
goto error_out;
}
return 0;
error_out:
kfree(msi);