[patch 10/22] genirq/msi, treewide: Use a named struct for PCI/MSI attributes

Thomas Gleixner
2021-11-27T01:21:44Z

The unnamed struct sucks and is in the way of further cleanups. Stick the
PCI related MSI data into a real data structure and cleanup all users.

No functional change.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: sparclinux@vger.kernel.org
Cc: x86@kernel.org
Cc: xen-devel@lists.xenproject.org
Cc: ath11k@lists.infradead.org
---
arch/powerpc/platforms/cell/axon_msi.c | 2
arch/powerpc/platforms/powernv/pci-ioda.c | 4 -
arch/powerpc/platforms/pseries/msi.c | 6 -
arch/sparc/kernel/pci_msi.c | 4 -
arch/x86/kernel/apic/msi.c | 2
arch/x86/pci/xen.c | 6 -
drivers/net/wireless/ath/ath11k/pci.c | 2
drivers/pci/msi.c | 116 +++++++++++++++---------------
drivers/pci/xen-pcifront.c | 2
include/linux/msi.h | 84 ++++++++++-----------
kernel/irq/msi.c | 4 -
11 files changed, 115 insertions(+), 117 deletions(-)

--- a/arch/powerpc/platforms/cell/axon_msi.c
+++ b/arch/powerpc/platforms/cell/axon_msi.c
@@ -212,7 +212,7 @@ static int setup_msi_msg_address(struct
entry = first_pci_msi_entry(dev);

for (; dn; dn = of_get_next_parent(dn)) {
- if (entry->msi_attrib.is_64) {
+ if (entry->pci.msi_attrib.is_64) {
prop = of_get_property(dn, "msi-address-64", &len);
if (prop)
break;
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -2154,10 +2154,10 @@ static void pnv_msi_compose_msg(struct i
int rc;

rc = __pnv_pci_ioda_msi_setup(phb, pdev, d->hwirq,
- entry->msi_attrib.is_64, msg);
+ entry->pci.msi_attrib.is_64, msg);
if (rc)
dev_err(&pdev->dev, "Failed to setup %s-bit MSI #%ld : %d\n",
- entry->msi_attrib.is_64 ? "64" : "32", d->hwirq, rc);
+ entry->pci.msi_attrib.is_64 ? "64" : "32", d->hwirq, rc);
}

/*
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -332,7 +332,7 @@ static int check_msix_entries(struct pci

expected = 0;
for_each_pci_msi_entry(entry, pdev) {
- if (entry->msi_attrib.entry_nr != expected) {
+ if (entry->pci.msi_attrib.entry_nr != expected) {
pr_debug("rtas_msi: bad MSI-X entries.\n");
return -EINVAL;
}
@@ -449,7 +449,7 @@ static int pseries_msi_ops_prepare(struc
{
struct pci_dev *pdev = to_pci_dev(dev);
struct msi_desc *desc = first_pci_msi_entry(pdev);
- int type = desc->msi_attrib.is_msix ? PCI_CAP_ID_MSIX : PCI_CAP_ID_MSI;
+ int type = desc->pci.msi_attrib.is_msix ? PCI_CAP_ID_MSIX : PCI_CAP_ID_MSI;

return rtas_prepare_msi_irqs(pdev, nvec, type, arg);
}
@@ -580,7 +580,7 @@ static int pseries_irq_domain_alloc(stru
int hwirq;
int i, ret;

- hwirq = rtas_query_irq_number(pci_get_pdn(pdev), desc->msi_attrib.entry_nr);
+ hwirq = rtas_query_irq_number(pci_get_pdn(pdev), desc->pci.msi_attrib.entry_nr);
if (hwirq < 0) {
dev_err(&pdev->dev, "Failed to query HW IRQ: %d\n", hwirq);
return hwirq;
--- a/arch/sparc/kernel/pci_msi.c
+++ b/arch/sparc/kernel/pci_msi.c
@@ -146,13 +146,13 @@ static int sparc64_setup_msi_irq(unsigne
msiqid = pick_msiq(pbm);

err = ops->msi_setup(pbm, msiqid, msi,
- (entry->msi_attrib.is_64 ? 1 : 0));
+ (entry->pci.msi_attrib.is_64 ? 1 : 0));
if (err)
goto out_msi_free;

pbm->msi_irq_table[msi - pbm->msi_first] = *irq_p;

- if (entry->msi_attrib.is_64) {
+ if (entry->pci.msi_attrib.is_64) {
msg.address_hi = pbm->msi64_start >> 32;
msg.address_lo = pbm->msi64_start & 0xffffffff;
} else {
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -163,7 +163,7 @@ int pci_msi_prepare(struct irq_domain *d
struct msi_desc *desc = first_pci_msi_entry(pdev);

init_irq_alloc_info(arg, NULL);
- if (desc->msi_attrib.is_msix) {
+ if (desc->pci.msi_attrib.is_msix) {
arg->type = X86_IRQ_ALLOC_TYPE_PCI_MSIX;
} else {
arg->type = X86_IRQ_ALLOC_TYPE_PCI_MSI;
--- a/arch/x86/pci/xen.c
+++ b/arch/x86/pci/xen.c
@@ -306,7 +306,7 @@ static int xen_initdom_setup_msi_irqs(st
return -EINVAL;

map_irq.table_base = pci_resource_start(dev, bir);
- map_irq.entry_nr = msidesc->msi_attrib.entry_nr;
+ map_irq.entry_nr = msidesc->pci.msi_attrib.entry_nr;
}

ret = -EINVAL;
@@ -398,7 +398,7 @@ static void xen_pv_teardown_msi_irqs(str
{
struct msi_desc *msidesc = first_pci_msi_entry(dev);

- if (msidesc->msi_attrib.is_msix)
+ if (msidesc->pci.msi_attrib.is_msix)
xen_pci_frontend_disable_msix(dev);
else
xen_pci_frontend_disable_msi(dev);
@@ -414,7 +414,7 @@ static int xen_msi_domain_alloc_irqs(str
if (WARN_ON_ONCE(!dev_is_pci(dev)))
return -EINVAL;

- if (first_msi_entry(dev)->msi_attrib.is_msix)
+ if (first_msi_entry(dev)->pci.msi_attrib.is_msix)
type = PCI_CAP_ID_MSIX;
else
type = PCI_CAP_ID_MSI;
--- a/drivers/net/wireless/ath/ath11k/pci.c
+++ b/drivers/net/wireless/ath/ath11k/pci.c
@@ -911,7 +911,7 @@ static int ath11k_pci_alloc_msi(struct a
}

ab_pci->msi_ep_base_data = msi_desc->msg.data;
- if (msi_desc->msi_attrib.is_64)
+ if (msi_desc->pci.msi_attrib.is_64)
set_bit(ATH11K_PCI_FLAG_IS_MSI_64, &ab_pci->flags);

ath11k_dbg(ab, ATH11K_DBG_PCI, "msi base data is %d\n", ab_pci->msi_ep_base_data);
--- a/drivers/pci/msi.c
+++ b/drivers/pci/msi.c
@@ -138,9 +138,9 @@ void __weak arch_restore_msi_irqs(struct
static inline __attribute_const__ u32 msi_multi_mask(struct msi_desc *desc)
{
/* Don't shift by >= width of type */
- if (desc->msi_attrib.multi_cap >= 5)
+ if (desc->pci.msi_attrib.multi_cap >= 5)
return 0xffffffff;
- return (1 << (1 << desc->msi_attrib.multi_cap)) - 1;
+ return (1 << (1 << desc->pci.msi_attrib.multi_cap)) - 1;
}

static noinline void pci_msi_update_mask(struct msi_desc *desc, u32 clear, u32 set)
@@ -148,14 +148,14 @@ static noinline void pci_msi_update_mask
raw_spinlock_t *lock = &desc->dev->msi_lock;
unsigned long flags;

- if (!desc->msi_attrib.can_mask)
+ if (!desc->pci.msi_attrib.can_mask)
return;

raw_spin_lock_irqsave(lock, flags);
- desc->msi_mask &= ~clear;
- desc->msi_mask |= set;
- pci_write_config_dword(msi_desc_to_pci_dev(desc), desc->mask_pos,
- desc->msi_mask);
+ desc->pci.msi_mask &= ~clear;
+ desc->pci.msi_mask |= set;
+ pci_write_config_dword(msi_desc_to_pci_dev(desc), desc->pci.mask_pos,
+ desc->pci.msi_mask);
raw_spin_unlock_irqrestore(lock, flags);
}

@@ -171,7 +171,7 @@ static inline void pci_msi_unmask(struct

static inline void __iomem *pci_msix_desc_addr(struct msi_desc *desc)
{
- return desc->mask_base + desc->msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
+ return desc->pci.mask_base + desc->pci.msi_attrib.entry_nr * PCI_MSIX_ENTRY_SIZE;
}

/*
@@ -184,27 +184,27 @@ static void pci_msix_write_vector_ctrl(s
{
void __iomem *desc_addr = pci_msix_desc_addr(desc);

- if (desc->msi_attrib.can_mask)
+ if (desc->pci.msi_attrib.can_mask)
writel(ctrl, desc_addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
}

static inline void pci_msix_mask(struct msi_desc *desc)
{
- desc->msix_ctrl |= PCI_MSIX_ENTRY_CTRL_MASKBIT;
- pci_msix_write_vector_ctrl(desc, desc->msix_ctrl);
+ desc->pci.msix_ctrl |= PCI_MSIX_ENTRY_CTRL_MASKBIT;
+ pci_msix_write_vector_ctrl(desc, desc->pci.msix_ctrl);
/* Flush write to device */
- readl(desc->mask_base);
+ readl(desc->pci.mask_base);
}

static inline void pci_msix_unmask(struct msi_desc *desc)
{
- desc->msix_ctrl &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
- pci_msix_write_vector_ctrl(desc, desc->msix_ctrl);
+ desc->pci.msix_ctrl &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
+ pci_msix_write_vector_ctrl(desc, desc->pci.msix_ctrl);
}

static void __pci_msi_mask_desc(struct msi_desc *desc, u32 mask)
{
- if (desc->msi_attrib.is_msix)
+ if (desc->pci.msi_attrib.is_msix)
pci_msix_mask(desc);
else
pci_msi_mask(desc, mask);
@@ -212,7 +212,7 @@ static void __pci_msi_mask_desc(struct m

static void __pci_msi_unmask_desc(struct msi_desc *desc, u32 mask)
{
- if (desc->msi_attrib.is_msix)
+ if (desc->pci.msi_attrib.is_msix)
pci_msix_unmask(desc);
else
pci_msi_unmask(desc, mask);
@@ -256,10 +256,10 @@ void __pci_read_msi_msg(struct msi_desc

BUG_ON(dev->current_state != PCI_D0);

- if (entry->msi_attrib.is_msix) {
+ if (entry->pci.msi_attrib.is_msix) {
void __iomem *base = pci_msix_desc_addr(entry);

- if (WARN_ON_ONCE(entry->msi_attrib.is_virtual))
+ if (WARN_ON_ONCE(entry->pci.msi_attrib.is_virtual))
return;

msg->address_lo = readl(base + PCI_MSIX_ENTRY_LOWER_ADDR);
@@ -271,7 +271,7 @@ void __pci_read_msi_msg(struct msi_desc

pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_LO,
&msg->address_lo);
- if (entry->msi_attrib.is_64) {
+ if (entry->pci.msi_attrib.is_64) {
pci_read_config_dword(dev, pos + PCI_MSI_ADDRESS_HI,
&msg->address_hi);
pci_read_config_word(dev, pos + PCI_MSI_DATA_64, &data);
@@ -289,12 +289,12 @@ void __pci_write_msi_msg(struct msi_desc

if (dev->current_state != PCI_D0 || pci_dev_is_disconnected(dev)) {
/* Don't touch the hardware now */
- } else if (entry->msi_attrib.is_msix) {
+ } else if (entry->pci.msi_attrib.is_msix) {
void __iomem *base = pci_msix_desc_addr(entry);
- u32 ctrl = entry->msix_ctrl;
+ u32 ctrl = entry->pci.msix_ctrl;
bool unmasked = !(ctrl & PCI_MSIX_ENTRY_CTRL_MASKBIT);

- if (entry->msi_attrib.is_virtual)
+ if (entry->pci.msi_attrib.is_virtual)
goto skip;

/*
@@ -323,12 +323,12 @@ void __pci_write_msi_msg(struct msi_desc

pci_read_config_word(dev, pos + PCI_MSI_FLAGS, &msgctl);
msgctl &= ~PCI_MSI_FLAGS_QSIZE;
- msgctl |= entry->msi_attrib.multiple << 4;
+ msgctl |= entry->pci.msi_attrib.multiple << 4;
pci_write_config_word(dev, pos + PCI_MSI_FLAGS, msgctl);

pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_LO,
msg->address_lo);
- if (entry->msi_attrib.is_64) {
+ if (entry->pci.msi_attrib.is_64) {
pci_write_config_dword(dev, pos + PCI_MSI_ADDRESS_HI,
msg->address_hi);
pci_write_config_word(dev, pos + PCI_MSI_DATA_64,
@@ -376,9 +376,9 @@ static void free_msi_irqs(struct pci_dev
pci_msi_teardown_msi_irqs(dev);

list_for_each_entry_safe(entry, tmp, msi_list, list) {
- if (entry->msi_attrib.is_msix) {
+ if (entry->pci.msi_attrib.is_msix) {
if (list_is_last(&entry->list, msi_list))
- iounmap(entry->mask_base);
+ iounmap(entry->pci.mask_base);
}

list_del(&entry->list);
@@ -420,7 +420,7 @@ static void __pci_restore_msi_state(stru
pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
pci_msi_update_mask(entry, 0, 0);
control &= ~PCI_MSI_FLAGS_QSIZE;
- control |= (entry->msi_attrib.multiple << 4) | PCI_MSI_FLAGS_ENABLE;
+ control |= (entry->pci.msi_attrib.multiple << 4) | PCI_MSI_FLAGS_ENABLE;
pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
}

@@ -449,7 +449,7 @@ static void __pci_restore_msix_state(str

arch_restore_msi_irqs(dev);
for_each_pci_msi_entry(entry, dev)
- pci_msix_write_vector_ctrl(entry, entry->msix_ctrl);
+ pci_msix_write_vector_ctrl(entry, entry->pci.msix_ctrl);

pci_msix_clear_and_set_ctrl(dev, PCI_MSIX_FLAGS_MASKALL, 0);
}
@@ -481,24 +481,24 @@ msi_setup_entry(struct pci_dev *dev, int
if (dev->dev_flags & PCI_DEV_FLAGS_HAS_MSI_MASKING)
control |= PCI_MSI_FLAGS_MASKBIT;

- entry->msi_attrib.is_msix = 0;
- entry->msi_attrib.is_64 = !!(control & PCI_MSI_FLAGS_64BIT);
- entry->msi_attrib.is_virtual = 0;
- entry->msi_attrib.entry_nr = 0;
- entry->msi_attrib.can_mask = !pci_msi_ignore_mask &&
+ entry->pci.msi_attrib.is_msix = 0;
+ entry->pci.msi_attrib.is_64 = !!(control & PCI_MSI_FLAGS_64BIT);
+ entry->pci.msi_attrib.is_virtual = 0;
+ entry->pci.msi_attrib.entry_nr = 0;
+ entry->pci.msi_attrib.can_mask = !pci_msi_ignore_mask &&
!!(control & PCI_MSI_FLAGS_MASKBIT);
- entry->msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
- entry->msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
- entry->msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));
+ entry->pci.msi_attrib.default_irq = dev->irq; /* Save IOAPIC IRQ */
+ entry->pci.msi_attrib.multi_cap = (control & PCI_MSI_FLAGS_QMASK) >> 1;
+ entry->pci.msi_attrib.multiple = ilog2(__roundup_pow_of_two(nvec));

if (control & PCI_MSI_FLAGS_64BIT)
- entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
+ entry->pci.mask_pos = dev->msi_cap + PCI_MSI_MASK_64;
else
- entry->mask_pos = dev->msi_cap + PCI_MSI_MASK_32;
+ entry->pci.mask_pos = dev->msi_cap + PCI_MSI_MASK_32;

/* Save the initial mask status */
- if (entry->msi_attrib.can_mask)
- pci_read_config_dword(dev, entry->mask_pos, &entry->msi_mask);
+ if (entry->pci.msi_attrib.can_mask)
+ pci_read_config_dword(dev, entry->pci.mask_pos, &entry->pci.msi_mask);

out:
kfree(masks);
@@ -630,26 +630,26 @@ static int msix_setup_entries(struct pci
goto out;
}

- entry->msi_attrib.is_msix = 1;
- entry->msi_attrib.is_64 = 1;
+ entry->pci.msi_attrib.is_msix = 1;
+ entry->pci.msi_attrib.is_64 = 1;

if (entries)
- entry->msi_attrib.entry_nr = entries[i].entry;
+ entry->pci.msi_attrib.entry_nr = entries[i].entry;
else
- entry->msi_attrib.entry_nr = i;
+ entry->pci.msi_attrib.entry_nr = i;

- entry->msi_attrib.is_virtual =
- entry->msi_attrib.entry_nr >= vec_count;
+ entry->pci.msi_attrib.is_virtual =
+ entry->pci.msi_attrib.entry_nr >= vec_count;

- entry->msi_attrib.can_mask = !pci_msi_ignore_mask &&
- !entry->msi_attrib.is_virtual;
+ entry->pci.msi_attrib.can_mask = !pci_msi_ignore_mask &&
+ !entry->pci.msi_attrib.is_virtual;

- entry->msi_attrib.default_irq = dev->irq;
- entry->mask_base = base;
+ entry->pci.msi_attrib.default_irq = dev->irq;
+ entry->pci.mask_base = base;

- if (entry->msi_attrib.can_mask) {
+ if (entry->pci.msi_attrib.can_mask) {
addr = pci_msix_desc_addr(entry);
- entry->msix_ctrl = readl(addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
+ entry->pci.msix_ctrl = readl(addr + PCI_MSIX_ENTRY_VECTOR_CTRL);
}

list_add_tail(&entry->list, dev_to_msi_list(&dev->dev));
@@ -874,7 +874,7 @@ static void pci_msi_shutdown(struct pci_
pci_msi_unmask(desc, msi_multi_mask(desc));

/* Restore dev->irq to its default pin-assertion IRQ */
- dev->irq = desc->msi_attrib.default_irq;
+ dev->irq = desc->pci.msi_attrib.default_irq;
pcibios_alloc_irq(dev);
}

@@ -1196,7 +1196,7 @@ int pci_irq_vector(struct pci_dev *dev,
struct msi_desc *entry;

for_each_pci_msi_entry(entry, dev) {
- if (entry->msi_attrib.entry_nr == nr)
+ if (entry->pci.msi_attrib.entry_nr == nr)
return entry->irq;
}
WARN_ON_ONCE(1);
@@ -1228,7 +1228,7 @@ const struct cpumask *pci_irq_get_affini
struct msi_desc *entry;

for_each_pci_msi_entry(entry, dev) {
- if (entry->msi_attrib.entry_nr == nr)
+ if (entry->pci.msi_attrib.entry_nr == nr)
return &entry->affinity->mask;
}
WARN_ON_ONCE(1);
@@ -1281,14 +1281,14 @@ static irq_hw_number_t pci_msi_domain_ca
{
struct pci_dev *dev = msi_desc_to_pci_dev(desc);

- return (irq_hw_number_t)desc->msi_attrib.entry_nr |
+ return (irq_hw_number_t)desc->pci.msi_attrib.entry_nr |
pci_dev_id(dev) << 11 |
(pci_domain_nr(dev->bus) & 0xFFFFFFFF) << 27;
}

static inline bool pci_msi_desc_is_multi_msi(struct msi_desc *desc)
{
- return !desc->msi_attrib.is_msix && desc->nvec_used > 1;
+ return !desc->pci.msi_attrib.is_msix && desc->nvec_used > 1;
}

/**
@@ -1312,7 +1312,7 @@ int pci_msi_domain_check_cap(struct irq_
if (pci_msi_desc_is_multi_msi(desc) &&
!(info->flags & MSI_FLAG_MULTI_PCI_MSI))
return 1;
- else if (desc->msi_attrib.is_msix && !(info->flags & MSI_FLAG_PCI_MSIX))
+ else if (desc->pci.msi_attrib.is_msix && !(info->flags & MSI_FLAG_PCI_MSIX))
return -ENOTSUPP;

return 0;
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -263,7 +263,7 @@ static int pci_frontend_enable_msix(stru

i = 0;
for_each_pci_msi_entry(entry, dev) {
- op.msix_entries[i].entry = entry->msi_attrib.entry_nr;
+ op.msix_entries[i].entry = entry->pci.msi_attrib.entry_nr;
/* Vector is useless at this point. */
op.msix_entries[i].vector = -1;
i++;
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -68,6 +68,42 @@ typedef void (*irq_write_msi_msg_t)(stru
struct msi_msg *msg);

/**
+ * pci_msi_desc - PCI/MSI specific MSI descriptor data
+ *
+ * @msi_mask: [PCI MSI] MSI cached mask bits
+ * @msix_ctrl: [PCI MSI-X] MSI-X cached per vector control bits
+ * @is_msix: [PCI MSI/X] True if MSI-X
+ * @multiple: [PCI MSI/X] log2 num of messages allocated
+ * @multi_cap: [PCI MSI/X] log2 num of messages supported
+ * @can_mask: [PCI MSI/X] Masking supported?
+ * @is_64: [PCI MSI/X] Address size: 0=32bit 1=64bit
+ * @entry_nr: [PCI MSI/X] Entry which is described by this descriptor
+ * @default_irq:[PCI MSI/X] The default pre-assigned non-MSI irq
+ * @mask_pos: [PCI MSI] Mask register position
+ * @mask_base: [PCI MSI-X] Mask register base address
+ */
+struct pci_msi_desc {
+ union {
+ u32 msi_mask;
+ u32 msix_ctrl;
+ };
+ struct {
+ u8 is_msix : 1;
+ u8 multiple : 3;
+ u8 multi_cap : 3;
+ u8 can_mask : 1;
+ u8 is_64 : 1;
+ u8 is_virtual : 1;
+ u16 entry_nr;
+ unsigned default_irq;
+ } msi_attrib;
+ union {
+ u8 mask_pos;
+ void __iomem *mask_base;
+ };
+};
+
+/**
* platform_msi_desc - Platform device specific msi descriptor data
* @msi_priv_data: Pointer to platform private data
* @msi_index: The index of the MSI descriptor for multi MSI
@@ -106,17 +142,7 @@ struct ti_sci_inta_msi_desc {
* address or data changes
* @write_msi_msg_data: Data parameter for the callback.
*
- * @msi_mask: [PCI MSI] MSI cached mask bits
- * @msix_ctrl: [PCI MSI-X] MSI-X cached per vector control bits
- * @is_msix: [PCI MSI/X] True if MSI-X
- * @multiple: [PCI MSI/X] log2 num of messages allocated
- * @multi_cap: [PCI MSI/X] log2 num of messages supported
- * @maskbit: [PCI MSI/X] Mask-Pending bit supported?
- * @is_64: [PCI MSI/X] Address size: 0=32bit 1=64bit
- * @entry_nr: [PCI MSI/X] Entry which is described by this descriptor
- * @default_irq:[PCI MSI/X] The default pre-assigned non-MSI irq
- * @mask_pos: [PCI MSI] Mask register position
- * @mask_base: [PCI MSI-X] Mask register base address
+ * @pci: [PCI] PCI speficic msi descriptor data
* @platform: [platform] Platform device specific msi descriptor data
* @fsl_mc: [fsl-mc] FSL MC device specific msi descriptor data
* @inta: [INTA] TISCI based INTA specific msi descriptor data
@@ -137,38 +163,10 @@ struct msi_desc {
void *write_msi_msg_data;

union {
- /* PCI MSI/X specific data */
- struct {
- union {
- u32 msi_mask;
- u32 msix_ctrl;
- };
- struct {
- u8 is_msix : 1;
- u8 multiple : 3;
- u8 multi_cap : 3;
- u8 can_mask : 1;
- u8 is_64 : 1;
- u8 is_virtual : 1;
- u16 entry_nr;
- unsigned default_irq;
- } msi_attrib;
- union {
- u8 mask_pos;
- void __iomem *mask_base;
- };
- };
-
- /*
- * Non PCI variants add their data structure here. New
- * entries need to use a named structure. We want
- * proper name spaces for this. The PCI part is
- * anonymous for now as it would require an immediate
- * tree wide cleanup.
- */
- struct platform_msi_desc platform;
- struct fsl_mc_msi_desc fsl_mc;
- struct ti_sci_inta_msi_desc inta;
+ struct pci_msi_desc pci;
+ struct platform_msi_desc platform;
+ struct fsl_mc_msi_desc fsl_mc;
+ struct ti_sci_inta_msi_desc inta;
};
};

--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -91,7 +91,7 @@ static ssize_t msi_mode_show(struct devi
return -ENODEV;

if (dev_is_pci(dev))
- is_msix = entry->msi_attrib.is_msix;
+ is_msix = entry->pci.msi_attrib.is_msix;

return sysfs_emit(buf, "%s\n", is_msix ? "msix" : "msi");
}
@@ -535,7 +535,7 @@ static bool msi_check_reservation_mode(s
* masking and MSI does so when the can_mask attribute is set.
*/
desc = first_msi_entry(dev);
- return desc->msi_attrib.is_msix || desc->msi_attrib.can_mask;
+ return desc->pci.msi_attrib.is_msix || desc->pci.msi_attrib.can_mask;
}

int __msi_domain_alloc_irqs(struct irq_domain *domain, struct device *dev,