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powerpc/fsl_msi: add MSIIR1 support for MPIC v4.3

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The original MPIC MSI bank contains 8 registers, MPIC v4.3 MSI bank
contains 16 registers, and this patch adds NR_MSI_REG_MAX and
NR_MSI_IRQS_MAX to describe the maximum capability of MSI bank.
MPIC v4.3 provides MSIIR1 to index these 16 MSI registers. MSIIR1
uses different bits definition than MSIIR. This patch adds
ibs_shift and srs_shift to indicate the bits definition of the
MSIIR and MSIIR1, so the same code can handle the MSIIR and MSIIR1
simultaneously.

Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
[scottwood@freescale.com: reinstated static on all_avail]
Signed-off-by: Scott Wood <scottwood@freescale.com>
This commit is contained in:
Minghuan Lian 2013-06-21 18:59:14 +08:00 committed by Scott Wood
parent 6d854acd24
commit f31dd9443a
2 changed files with 101 additions and 41 deletions
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132
arch/powerpc/sysdev/fsl_msi.c
View File

@ -28,6 +28,18 @@
#include "fsl_msi.h"
#include "fsl_pci.h"
#define MSIIR_OFFSET_MASK 0xfffff
#define MSIIR_IBS_SHIFT 0
#define MSIIR_SRS_SHIFT 5
#define MSIIR1_IBS_SHIFT 4
#define MSIIR1_SRS_SHIFT 0
#define MSI_SRS_MASK 0xf
#define MSI_IBS_MASK 0x1f
#define msi_hwirq(msi, msir_index, intr_index) \
((msir_index) << (msi)->srs_shift | \
((intr_index) << (msi)->ibs_shift))
static LIST_HEAD(msi_head);
struct fsl_msi_feature {
@ -80,18 +92,19 @@ static const struct irq_domain_ops fsl_msi_host_ops = {
static int fsl_msi_init_allocator(struct fsl_msi *msi_data)
{
int rc;
int rc, hwirq;
rc = msi_bitmap_alloc(&msi_data->bitmap, NR_MSI_IRQS,
rc = msi_bitmap_alloc(&msi_data->bitmap, NR_MSI_IRQS_MAX,
msi_data->irqhost->of_node);
if (rc)
return rc;
rc = msi_bitmap_reserve_dt_hwirqs(&msi_data->bitmap);
if (rc < 0) {
msi_bitmap_free(&msi_data->bitmap);
return rc;
}
/*
* Reserve all the hwirqs
* The available hwirqs will be released in fsl_msi_setup_hwirq()
*/
for (hwirq = 0; hwirq < NR_MSI_IRQS_MAX; hwirq++)
msi_bitmap_reserve_hwirq(&msi_data->bitmap, hwirq);
return 0;
}
@ -144,8 +157,9 @@ static void fsl_compose_msi_msg(struct pci_dev *pdev, int hwirq,
msg->data = hwirq;
pr_debug("%s: allocated srs: %d, ibs: %d\n",
__func__, hwirq / IRQS_PER_MSI_REG, hwirq % IRQS_PER_MSI_REG);
pr_debug("%s: allocated srs: %d, ibs: %d\n", __func__,
(hwirq >> msi_data->srs_shift) & MSI_SRS_MASK,
(hwirq >> msi_data->ibs_shift) & MSI_IBS_MASK);
}
static int fsl_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
@ -255,7 +269,7 @@ static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc)
msir_index = cascade_data->index;
if (msir_index >= NR_MSI_REG)
if (msir_index >= NR_MSI_REG_MAX)
cascade_irq = NO_IRQ;
irqd_set_chained_irq_inprogress(idata);
@ -285,8 +299,8 @@ static void fsl_msi_cascade(unsigned int irq, struct irq_desc *desc)
intr_index = ffs(msir_value) - 1;
cascade_irq = irq_linear_revmap(msi_data->irqhost,
msir_index * IRQS_PER_MSI_REG +
intr_index + have_shift);
msi_hwirq(msi_data, msir_index,
intr_index + have_shift));
if (cascade_irq != NO_IRQ)
generic_handle_irq(cascade_irq);
have_shift += intr_index + 1;
@ -316,7 +330,7 @@ static int fsl_of_msi_remove(struct platform_device *ofdev)
if (msi->list.prev != NULL)
list_del(&msi->list);
for (i = 0; i < NR_MSI_REG; i++) {
for (i = 0; i < NR_MSI_REG_MAX; i++) {
virq = msi->msi_virqs[i];
if (virq != NO_IRQ) {
cascade_data = irq_get_handler_data(virq);
@ -339,7 +353,7 @@ static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,
int offset, int irq_index)
{
struct fsl_msi_cascade_data *cascade_data = NULL;
int virt_msir;
int virt_msir, i;
virt_msir = irq_of_parse_and_map(dev->dev.of_node, irq_index);
if (virt_msir == NO_IRQ) {
@ -360,6 +374,11 @@ static int fsl_msi_setup_hwirq(struct fsl_msi *msi, struct platform_device *dev,
irq_set_handler_data(virt_msir, cascade_data);
irq_set_chained_handler(virt_msir, fsl_msi_cascade);
/* Release the hwirqs corresponding to this MSI register */
for (i = 0; i < IRQS_PER_MSI_REG; i++)
msi_bitmap_free_hwirqs(&msi->bitmap,
msi_hwirq(msi, offset, i), 1);
return 0;
}
@ -368,13 +387,12 @@ static int fsl_of_msi_probe(struct platform_device *dev)
{
const struct of_device_id *match;
struct fsl_msi *msi;
struct resource res;
struct resource res, msiir;
int err, i, j, irq_index, count;
const u32 *p;
const struct fsl_msi_feature *features;
int len;
u32 offset;
static const u32 all_avail[] = { 0, NR_MSI_IRQS };
match = of_match_device(fsl_of_msi_ids, &dev->dev);
if (!match)
@ -391,7 +409,7 @@ static int fsl_of_msi_probe(struct platform_device *dev)
platform_set_drvdata(dev, msi);
msi->irqhost = irq_domain_add_linear(dev->dev.of_node,
NR_MSI_IRQS, &fsl_msi_host_ops, msi);
NR_MSI_IRQS_MAX, &fsl_msi_host_ops, msi);
if (msi->irqhost == NULL) {
dev_err(&dev->dev, "No memory for MSI irqhost\n");
@ -420,6 +438,16 @@ static int fsl_of_msi_probe(struct platform_device *dev)
}
msi->msiir_offset =
features->msiir_offset + (res.start & 0xfffff);
/*
* First read the MSIIR/MSIIR1 offset from dts
* On failure use the hardcode MSIIR offset
*/
if (of_address_to_resource(dev->dev.of_node, 1, &msiir))
msi->msiir_offset = features->msiir_offset +
(res.start & MSIIR_OFFSET_MASK);
else
msi->msiir_offset = msiir.start & MSIIR_OFFSET_MASK;
}
msi->feature = features->fsl_pic_ip;
@ -437,35 +465,59 @@ static int fsl_of_msi_probe(struct platform_device *dev)
}
p = of_get_property(dev->dev.of_node, "msi-available-ranges", &len);
if (p && len % (2 * sizeof(u32)) != 0) {
dev_err(&dev->dev, "%s: Malformed msi-available-ranges property\n",
__func__);
err = -EINVAL;
goto error_out;
}
if (!p) {
p = all_avail;
len = sizeof(all_avail);
}
if (of_device_is_compatible(dev->dev.of_node, "fsl,mpic-msi-v4.3")) {
msi->srs_shift = MSIIR1_SRS_SHIFT;
msi->ibs_shift = MSIIR1_IBS_SHIFT;
if (p)
dev_warn(&dev->dev, "%s: dose not support msi-available-ranges property\n",
__func__);
for (irq_index = 0, i = 0; i < len / (2 * sizeof(u32)); i++) {
if (p[i * 2] % IRQS_PER_MSI_REG ||
p[i * 2 + 1] % IRQS_PER_MSI_REG) {
printk(KERN_WARNING "%s: %s: msi available range of %u at %u is not IRQ-aligned\n",
__func__, dev->dev.of_node->full_name,
p[i * 2 + 1], p[i * 2]);
for (irq_index = 0; irq_index < NR_MSI_REG_MSIIR1;
irq_index++) {
err = fsl_msi_setup_hwirq(msi, dev,
irq_index, irq_index);
if (err)
goto error_out;
}
} else {
static const u32 all_avail[] =
{ 0, NR_MSI_REG_MSIIR * IRQS_PER_MSI_REG };
msi->srs_shift = MSIIR_SRS_SHIFT;
msi->ibs_shift = MSIIR_IBS_SHIFT;
if (p && len % (2 * sizeof(u32)) != 0) {
dev_err(&dev->dev, "%s: Malformed msi-available-ranges property\n",
__func__);
err = -EINVAL;
goto error_out;
}
offset = p[i * 2] / IRQS_PER_MSI_REG;
count = p[i * 2 + 1] / IRQS_PER_MSI_REG;
if (!p) {
p = all_avail;
len = sizeof(all_avail);
}
for (j = 0; j < count; j++, irq_index++) {
err = fsl_msi_setup_hwirq(msi, dev, offset + j, irq_index);
if (err)
for (irq_index = 0, i = 0; i < len / (2 * sizeof(u32)); i++) {
if (p[i * 2] % IRQS_PER_MSI_REG ||
p[i * 2 + 1] % IRQS_PER_MSI_REG) {
pr_warn("%s: %s: msi available range of %u at %u is not IRQ-aligned\n",
__func__, dev->dev.of_node->full_name,
p[i * 2 + 1], p[i * 2]);
err = -EINVAL;
goto error_out;
}
offset = p[i * 2] / IRQS_PER_MSI_REG;
count = p[i * 2 + 1] / IRQS_PER_MSI_REG;
for (j = 0; j < count; j++, irq_index++) {
err = fsl_msi_setup_hwirq(msi, dev, offset + j,
irq_index);
if (err)
goto error_out;
}
}
}
@ -507,6 +559,10 @@ static const struct of_device_id fsl_of_msi_ids[] = {
.compatible = "fsl,mpic-msi",
.data = &mpic_msi_feature,
},
{
.compatible = "fsl,mpic-msi-v4.3",
.data = &mpic_msi_feature,
},
{
.compatible = "fsl,ipic-msi",
.data = &ipic_msi_feature,

10
arch/powerpc/sysdev/fsl_msi.h
View File

@ -16,9 +16,11 @@
#include <linux/of.h>
#include <asm/msi_bitmap.h>
#define NR_MSI_REG 8
#define NR_MSI_REG_MSIIR 8 /* MSIIR can index 8 MSI registers */
#define NR_MSI_REG_MSIIR1 16 /* MSIIR1 can index 16 MSI registers */
#define NR_MSI_REG_MAX NR_MSI_REG_MSIIR1
#define IRQS_PER_MSI_REG 32
#define NR_MSI_IRQS (NR_MSI_REG * IRQS_PER_MSI_REG)
#define NR_MSI_IRQS_MAX (NR_MSI_REG_MAX * IRQS_PER_MSI_REG)
#define FSL_PIC_IP_MASK 0x0000000F
#define FSL_PIC_IP_MPIC 0x00000001
@ -31,9 +33,11 @@ struct fsl_msi {
unsigned long cascade_irq;
u32 msiir_offset; /* Offset of MSIIR, relative to start of CCSR */
u32 ibs_shift; /* Shift of interrupt bit select */
u32 srs_shift; /* Shift of the shared interrupt register select */
void __iomem *msi_regs;
u32 feature;
int msi_virqs[NR_MSI_REG];
int msi_virqs[NR_MSI_REG_MAX];
struct msi_bitmap bitmap;