PCI/MSI/PPC: Remove arch_msi_check_device()

Move MSI checks from arch_msi_check_device() to arch_setup_msi_irqs().
This makes the code more compact and allows removing
arch_msi_check_device() from generic MSI code.

Signed-off-by: Alexander Gordeev <agordeev@redhat.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>

10 files changed, 50 insertions, 122 deletions

diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index b125ceab149c..3af721633618 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -136,8 +136,6 @@ struct machdep_calls {
         int             (*pci_setup_phb)(struct pci_controller *host);
 
 #ifdef CONFIG_PCI_MSI
-        int             (*msi_check_device)(struct pci_dev* dev,
-                                            int nvec, int type);
         int             (*setup_msi_irqs)(struct pci_dev *dev,
                                           int nvec, int type);
         void            (*teardown_msi_irqs)(struct pci_dev *dev);
diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c
index 8bbc12d20f5c..71bd161640cf 100644
--- a/arch/powerpc/kernel/msi.c
+++ b/arch/powerpc/kernel/msi.c
@@ -13,7 +13,7 @@
 
 #include <asm/machdep.h>
 
-int arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
+int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
 {
         if (!ppc_md.setup_msi_irqs || !ppc_md.teardown_msi_irqs) {
                 pr_debug("msi: Platform doesn't provide MSI callbacks.\n");
@@ -24,16 +24,6 @@ int arch_msi_check_device(struct pci_dev* dev, int nvec, int type)
         if (type == PCI_CAP_ID_MSI && nvec > 1)
                 return 1;
 
-        if (ppc_md.msi_check_device) {
-                pr_debug("msi: Using platform check routine.\n");
-                return ppc_md.msi_check_device(dev, nvec, type);
-        }
-
-        return 0;
-}
-
-int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
-{
         return ppc_md.setup_msi_irqs(dev, nvec, type);
 }
 
diff --git a/arch/powerpc/platforms/cell/axon_msi.c b/arch/powerpc/platforms/cell/axon_msi.c
index 85825b5401e5..862b32702d29 100644
--- a/arch/powerpc/platforms/cell/axon_msi.c
+++ b/arch/powerpc/platforms/cell/axon_msi.c
@@ -199,14 +199,6 @@ out_error:
         return msic;
 }
 
-static int axon_msi_check_device(struct pci_dev *dev, int nvec, int type)
-{
-        if (!find_msi_translator(dev))
-                return -ENODEV;
-
-        return 0;
-}
-
 static int setup_msi_msg_address(struct pci_dev *dev, struct msi_msg *msg)
 {
         struct device_node *dn;
@@ -416,7 +408,6 @@ static int axon_msi_probe(struct platform_device *device)
 
         ppc_md.setup_msi_irqs = axon_msi_setup_msi_irqs;
         ppc_md.teardown_msi_irqs = axon_msi_teardown_msi_irqs;
-        ppc_md.msi_check_device = axon_msi_check_device;
 
         axon_msi_debug_setup(dn, msic);
 
diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index b854b57ed5e1..b45c49249a5d 100644
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -46,29 +46,21 @@
 //#define cfg_dbg(fmt...)       printk(fmt)
 
 #ifdef CONFIG_PCI_MSI
-static int pnv_msi_check_device(struct pci_dev* pdev, int nvec, int type)
-{
-        struct pci_controller *hose = pci_bus_to_host(pdev->bus);
-        struct pnv_phb *phb = hose->private_data;
-        struct pci_dn *pdn = pci_get_pdn(pdev);
-
-        if (pdn && pdn->force_32bit_msi && !phb->msi32_support)
-                return -ENODEV;
-
-        return (phb && phb->msi_bmp.bitmap) ? 0 : -ENODEV;
-}
-
 static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
 {
         struct pci_controller *hose = pci_bus_to_host(pdev->bus);
         struct pnv_phb *phb = hose->private_data;
+        struct pci_dn *pdn = pci_get_pdn(pdev);
         struct msi_desc *entry;
         struct msi_msg msg;
         int hwirq;
         unsigned int virq;
         int rc;
 
-        if (WARN_ON(!phb))
+        if (WARN_ON(!phb) || !phb->msi_bmp.bitmap)
+                return -ENODEV;
+
+        if (pdn && pdn->force_32bit_msi && !phb->msi32_support)
                 return -ENODEV;
 
         list_for_each_entry(entry, &pdev->msi_list, list) {
@@ -860,7 +852,6 @@ void __init pnv_pci_init(void)
 
         /* Configure MSIs */
 #ifdef CONFIG_PCI_MSI
-        ppc_md.msi_check_device = pnv_msi_check_device;
         ppc_md.setup_msi_irqs = pnv_setup_msi_irqs;
         ppc_md.teardown_msi_irqs = pnv_teardown_msi_irqs;
 #endif
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index 18ff4626d74e..e68c196def1a 100644
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -336,26 +336,6 @@ out:
         return request;
 }
 
-static int rtas_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
-        int quota, rc;
-
-        if (type == PCI_CAP_ID_MSIX)
-                rc = check_req_msix(pdev, nvec);
-        else
-                rc = check_req_msi(pdev, nvec);
-
-        if (rc)
-                return rc;
-
-        quota = msi_quota_for_device(pdev, nvec);
-
-        if (quota && quota < nvec)
-                return quota;
-
-        return 0;
-}
-
 static int check_msix_entries(struct pci_dev *pdev)
 {
         struct msi_desc *entry;
@@ -397,15 +377,24 @@ static void rtas_hack_32bit_msi_gen2(struct pci_dev *pdev)
 static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type)
 {
         struct pci_dn *pdn;
-        int hwirq, virq, i, rc;
+        int hwirq, virq, i, quota, rc;
         struct msi_desc *entry;
         struct msi_msg msg;
         int nvec = nvec_in;
         int use_32bit_msi_hack = 0;
 
-        pdn = pci_get_pdn(pdev);
-        if (!pdn)
-                return -ENODEV;
+        if (type == PCI_CAP_ID_MSIX)
+                rc = check_req_msix(pdev, nvec);
+        else
+                rc = check_req_msi(pdev, nvec);
+
+        if (rc)
+                return rc;
+
+        quota = msi_quota_for_device(pdev, nvec);
+
+        if (quota && quota < nvec)
+                return quota;
 
         if (type == PCI_CAP_ID_MSIX && check_msix_entries(pdev))
                 return -EINVAL;
@@ -416,12 +405,14 @@ static int rtas_setup_msi_irqs(struct pci_dev *pdev, int nvec_in, int type)
          */
         if (type == PCI_CAP_ID_MSIX) {
                 int m = roundup_pow_of_two(nvec);
-                int quota = msi_quota_for_device(pdev, m);
+                quota = msi_quota_for_device(pdev, m);
 
                 if (quota >= m)
                         nvec = m;
         }
 
+        pdn = pci_get_pdn(pdev);
+
         /*
          * Try the new more explicit firmware interface, if that fails fall
          * back to the old interface. The old interface is known to never
@@ -526,7 +517,6 @@ static int rtas_msi_init(void)
         WARN_ON(ppc_md.setup_msi_irqs);
         ppc_md.setup_msi_irqs = rtas_setup_msi_irqs;
         ppc_md.teardown_msi_irqs = rtas_teardown_msi_irqs;
-        ppc_md.msi_check_device = rtas_msi_check_device;
 
         WARN_ON(ppc_md.pci_irq_fixup);
         ppc_md.pci_irq_fixup = rtas_msi_pci_irq_fixup;
diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c
index 77efbaec7b9c..b32e79dbef4f 100644
--- a/arch/powerpc/sysdev/fsl_msi.c
+++ b/arch/powerpc/sysdev/fsl_msi.c
@@ -109,14 +109,6 @@ static int fsl_msi_init_allocator(struct fsl_msi *msi_data)
         return 0;
 }
 
-static int fsl_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
-        if (type == PCI_CAP_ID_MSIX)
-                pr_debug("fslmsi: MSI-X untested, trying anyway.\n");
-
-        return 0;
-}
-
 static void fsl_teardown_msi_irqs(struct pci_dev *pdev)
 {
         struct msi_desc *entry;
@@ -173,6 +165,9 @@ static int fsl_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
         struct msi_msg msg;
         struct fsl_msi *msi_data;
 
+        if (type == PCI_CAP_ID_MSIX)
+                pr_debug("fslmsi: MSI-X untested, trying anyway.\n");
+
         /*
          * If the PCI node has an fsl,msi property, then we need to use it
          * to find the specific MSI.
@@ -527,7 +522,6 @@ static int fsl_of_msi_probe(struct platform_device *dev)
         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;
diff --git a/arch/powerpc/sysdev/mpic_pasemi_msi.c b/arch/powerpc/sysdev/mpic_pasemi_msi.c
index 38e62382070c..15dccd35fa11 100644
--- a/arch/powerpc/sysdev/mpic_pasemi_msi.c
+++ b/arch/powerpc/sysdev/mpic_pasemi_msi.c
@@ -63,14 +63,6 @@ static struct irq_chip mpic_pasemi_msi_chip = {
         .name                   = "PASEMI-MSI",
 };
 
-static int pasemi_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
-        if (type == PCI_CAP_ID_MSIX)
-                pr_debug("pasemi_msi: MSI-X untested, trying anyway\n");
-
-        return 0;
-}
-
 static void pasemi_msi_teardown_msi_irqs(struct pci_dev *pdev)
 {
         struct msi_desc *entry;
@@ -97,6 +89,8 @@ static int pasemi_msi_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
         struct msi_msg msg;
         int hwirq;
 
+        if (type == PCI_CAP_ID_MSIX)
+                pr_debug("pasemi_msi: MSI-X untested, trying anyway\n");
         pr_debug("pasemi_msi_setup_msi_irqs, pdev %p nvec %d type %d\n",
                  pdev, nvec, type);
 
@@ -169,7 +163,6 @@ int mpic_pasemi_msi_init(struct mpic *mpic)
         WARN_ON(ppc_md.setup_msi_irqs);
         ppc_md.setup_msi_irqs = pasemi_msi_setup_msi_irqs;
         ppc_md.teardown_msi_irqs = pasemi_msi_teardown_msi_irqs;
-        ppc_md.msi_check_device = pasemi_msi_check_device;
 
         return 0;
 }
diff --git a/arch/powerpc/sysdev/mpic_u3msi.c b/arch/powerpc/sysdev/mpic_u3msi.c
index 9a7aa0ed9c1c..623d7fba15b4 100644
--- a/arch/powerpc/sysdev/mpic_u3msi.c
+++ b/arch/powerpc/sysdev/mpic_u3msi.c
@@ -105,22 +105,6 @@ static u64 find_u4_magic_addr(struct pci_dev *pdev, unsigned int hwirq)
         return 0;
 }
 
-static int u3msi_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
-        if (type == PCI_CAP_ID_MSIX)
-                pr_debug("u3msi: MSI-X untested, trying anyway.\n");
-
-        /* If we can't find a magic address then MSI ain't gonna work */
-        if (find_ht_magic_addr(pdev, 0) == 0 &&
-            find_u4_magic_addr(pdev, 0) == 0) {
-                pr_debug("u3msi: no magic address found for %s\n",
-                         pci_name(pdev));
-                return -ENXIO;
-        }
-
-        return 0;
-}
-
 static void u3msi_teardown_msi_irqs(struct pci_dev *pdev)
 {
         struct msi_desc *entry;
@@ -146,6 +130,17 @@ static int u3msi_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
         u64 addr;
         int hwirq;
 
+        if (type == PCI_CAP_ID_MSIX)
+                pr_debug("u3msi: MSI-X untested, trying anyway.\n");
+
+        /* If we can't find a magic address then MSI ain't gonna work */
+        if (find_ht_magic_addr(pdev, 0) == 0 &&
+            find_u4_magic_addr(pdev, 0) == 0) {
+                pr_debug("u3msi: no magic address found for %s\n",
+                         pci_name(pdev));
+                return -ENXIO;
+        }
+
         list_for_each_entry(entry, &pdev->msi_list, list) {
                 hwirq = msi_bitmap_alloc_hwirqs(&msi_mpic->msi_bitmap, 1);
                 if (hwirq < 0) {
@@ -202,7 +197,6 @@ int mpic_u3msi_init(struct mpic *mpic)
         WARN_ON(ppc_md.setup_msi_irqs);
         ppc_md.setup_msi_irqs = u3msi_setup_msi_irqs;
         ppc_md.teardown_msi_irqs = u3msi_teardown_msi_irqs;
-        ppc_md.msi_check_device = u3msi_msi_check_device;
 
         return 0;
 }
diff --git a/arch/powerpc/sysdev/ppc4xx_hsta_msi.c b/arch/powerpc/sysdev/ppc4xx_hsta_msi.c
index 11c888416f0a..a6a4dbda9078 100644
--- a/arch/powerpc/sysdev/ppc4xx_hsta_msi.c
+++ b/arch/powerpc/sysdev/ppc4xx_hsta_msi.c
@@ -44,6 +44,12 @@ static int hsta_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
         int irq, hwirq;
         u64 addr;
 
+        /* We don't support MSI-X */
+        if (type == PCI_CAP_ID_MSIX) {
+                pr_debug("%s: MSI-X not supported.\n", __func__);
+                return -EINVAL;
+        }
+
         list_for_each_entry(entry, &dev->msi_list, list) {
                 irq = msi_bitmap_alloc_hwirqs(&ppc4xx_hsta_msi.bmp, 1);
                 if (irq < 0) {
@@ -117,17 +123,6 @@ static void hsta_teardown_msi_irqs(struct pci_dev *dev)
         }
 }
 
-static int hsta_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
-        /* We don't support MSI-X */
-        if (type == PCI_CAP_ID_MSIX) {
-                pr_debug("%s: MSI-X not supported.\n", __func__);
-                return -EINVAL;
-        }
-
-        return 0;
-}
-
 static int hsta_msi_probe(struct platform_device *pdev)
 {
         struct device *dev = &pdev->dev;
@@ -178,7 +173,6 @@ static int hsta_msi_probe(struct platform_device *pdev)
 
         ppc_md.setup_msi_irqs = hsta_setup_msi_irqs;
         ppc_md.teardown_msi_irqs = hsta_teardown_msi_irqs;
-        ppc_md.msi_check_device = hsta_msi_check_device;
         return 0;
 
 out2:
diff --git a/arch/powerpc/sysdev/ppc4xx_msi.c b/arch/powerpc/sysdev/ppc4xx_msi.c
index 43948da837a7..22b5200636e7 100644
--- a/arch/powerpc/sysdev/ppc4xx_msi.c
+++ b/arch/powerpc/sysdev/ppc4xx_msi.c
@@ -85,8 +85,12 @@ static int ppc4xx_setup_msi_irqs(struct pci_dev *dev, int nvec, int type)
         struct msi_desc *entry;
         struct ppc4xx_msi *msi_data = &ppc4xx_msi;
 
-        msi_data->msi_virqs = kmalloc((msi_irqs) * sizeof(int),
-                                            GFP_KERNEL);
+        dev_dbg(&dev->dev, "PCIE-MSI:%s called. vec %x type %d\n",
+                __func__, nvec, type);
+        if (type == PCI_CAP_ID_MSIX)
+                pr_debug("ppc4xx msi: MSI-X untested, trying anyway.\n");
+
+        msi_data->msi_virqs = kmalloc((msi_irqs) * sizeof(int), GFP_KERNEL);
         if (!msi_data->msi_virqs)
                 return -ENOMEM;
 
@@ -134,16 +138,6 @@ void ppc4xx_teardown_msi_irqs(struct pci_dev *dev)
         }
 }
 
-static int ppc4xx_msi_check_device(struct pci_dev *pdev, int nvec, int type)
-{
-        dev_dbg(&pdev->dev, "PCIE-MSI:%s called. vec %x type %d\n",
-                __func__, nvec, type);
-        if (type == PCI_CAP_ID_MSIX)
-                pr_debug("ppc4xx msi: MSI-X untested, trying anyway.\n");
-
-        return 0;
-}
-
 static int ppc4xx_setup_pcieh_hw(struct platform_device *dev,
                                  struct resource res, struct ppc4xx_msi *msi)
 {
@@ -259,7 +253,6 @@ static int ppc4xx_msi_probe(struct platform_device *dev)
 
         ppc_md.setup_msi_irqs = ppc4xx_setup_msi_irqs;
         ppc_md.teardown_msi_irqs = ppc4xx_teardown_msi_irqs;
-        ppc_md.msi_check_device = ppc4xx_msi_check_device;
         return err;
 
 error_out: