From 247540b03bfcbbe26b86692c9424195d76eb67f0 Mon Sep 17 00:00:00 2001 From: Mai La Date: Sun, 18 Mar 2012 17:59:08 +0000 Subject: [PATCH] powerpc/44x: Fix PCI MSI support for Maui APM821xx SoC and Bluestone board This patch consists of: - Enable PCI MSI as default for Bluestone board - Change definition of number of MSI interrupts as it depends on SoC - Fix returning ENODEV as finding MSI node - Fix MSI physical high and low address - Keep MSI data logically Signed-off-by: Mai La Signed-off-by: Josh Boyer --- arch/powerpc/platforms/44x/Kconfig | 2 ++ arch/powerpc/sysdev/ppc4xx_msi.c | 42 ++++++++++++++++++++---------- 2 files changed, 30 insertions(+), 14 deletions(-) diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig index 2e4e64abfab4..8abf6fb8f410 100644 --- a/arch/powerpc/platforms/44x/Kconfig +++ b/arch/powerpc/platforms/44x/Kconfig @@ -23,6 +23,8 @@ config BLUESTONE default n select PPC44x_SIMPLE select APM821xx + select PCI_MSI + select PPC4xx_MSI select PPC4xx_PCI_EXPRESS select IBM_EMAC_RGMII help diff --git a/arch/powerpc/sysdev/ppc4xx_msi.c b/arch/powerpc/sysdev/ppc4xx_msi.c index 1c2d7af17bbe..cc17f591bd66 100644 --- a/arch/powerpc/sysdev/ppc4xx_msi.c +++ b/arch/powerpc/sysdev/ppc4xx_msi.c @@ -28,10 +28,11 @@ #include #include #include +#include #include #include #include -#include +#include #include #include @@ -43,13 +44,14 @@ #define PEIH_FLUSH0 0x30 #define PEIH_FLUSH1 0x38 #define PEIH_CNTRST 0x48 -#define NR_MSI_IRQS 4 + +static int msi_irqs; struct ppc4xx_msi { u32 msi_addr_lo; u32 msi_addr_hi; void __iomem *msi_regs; - int msi_virqs[NR_MSI_IRQS]; + int *msi_virqs; struct msi_bitmap bitmap; struct device_node *msi_dev; }; @@ -61,7 +63,7 @@ static int ppc4xx_msi_init_allocator(struct platform_device *dev, { int err; - err = msi_bitmap_alloc(&msi_data->bitmap, NR_MSI_IRQS, + err = msi_bitmap_alloc(&msi_data->bitmap, msi_irqs, dev->dev.of_node); if (err) return err; @@ -83,6 +85,11 @@ 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); + if (!msi_data->msi_virqs) + return -ENOMEM; + list_for_each_entry(entry, &dev->msi_list, list) { int_no = msi_bitmap_alloc_hwirqs(&msi_data->bitmap, 1); if (int_no >= 0) @@ -150,12 +157,11 @@ static int ppc4xx_setup_pcieh_hw(struct platform_device *dev, if (!sdr_addr) return -1; - SDR0_WRITE(sdr_addr, (u64)res.start >> 32); /*HIGH addr */ - SDR0_WRITE(sdr_addr + 1, res.start & 0xFFFFFFFF); /* Low addr */ - + mtdcri(SDR0, *sdr_addr, upper_32_bits(res.start)); /*HIGH addr */ + mtdcri(SDR0, *sdr_addr + 1, lower_32_bits(res.start)); /* Low addr */ msi->msi_dev = of_find_node_by_name(NULL, "ppc4xx-msi"); - if (msi->msi_dev) + if (!msi->msi_dev) return -ENODEV; msi->msi_regs = of_iomap(msi->msi_dev, 0); @@ -167,9 +173,12 @@ static int ppc4xx_setup_pcieh_hw(struct platform_device *dev, (u32) (msi->msi_regs + PEIH_TERMADH), (u32) (msi->msi_regs)); msi_virt = dma_alloc_coherent(&dev->dev, 64, &msi_phys, GFP_KERNEL); - msi->msi_addr_hi = 0x0; - msi->msi_addr_lo = (u32) msi_phys; - dev_dbg(&dev->dev, "PCIE-MSI: msi address 0x%x\n", msi->msi_addr_lo); + if (!msi_virt) + return -ENOMEM; + msi->msi_addr_hi = (u32)(msi_phys >> 32); + msi->msi_addr_lo = (u32)(msi_phys & 0xffffffff); + dev_dbg(&dev->dev, "PCIE-MSI: msi address high 0x%x, low 0x%x\n", + msi->msi_addr_hi, msi->msi_addr_lo); /* Progam the Interrupt handler Termination addr registers */ out_be32(msi->msi_regs + PEIH_TERMADH, msi->msi_addr_hi); @@ -185,6 +194,8 @@ static int ppc4xx_setup_pcieh_hw(struct platform_device *dev, out_be32(msi->msi_regs + PEIH_MSIED, *msi_data); out_be32(msi->msi_regs + PEIH_MSIMK, *msi_mask); + dma_free_coherent(&dev->dev, 64, msi_virt, msi_phys); + return 0; } @@ -194,7 +205,7 @@ static int ppc4xx_of_msi_remove(struct platform_device *dev) int i; int virq; - for (i = 0; i < NR_MSI_IRQS; i++) { + for (i = 0; i < msi_irqs; i++) { virq = msi->msi_virqs[i]; if (virq != NO_IRQ) irq_dispose_mapping(virq); @@ -215,8 +226,6 @@ static int __devinit ppc4xx_msi_probe(struct platform_device *dev) struct resource res; int err = 0; - msi = &ppc4xx_msi;/*keep the msi data for further use*/ - dev_dbg(&dev->dev, "PCIE-MSI: Setting up MSI support...\n"); msi = kzalloc(sizeof(struct ppc4xx_msi), GFP_KERNEL); @@ -234,6 +243,10 @@ static int __devinit ppc4xx_msi_probe(struct platform_device *dev) goto error_out; } + msi_irqs = of_irq_count(dev->dev.of_node); + if (!msi_irqs) + return -ENODEV; + if (ppc4xx_setup_pcieh_hw(dev, res, msi)) goto error_out; @@ -242,6 +255,7 @@ static int __devinit ppc4xx_msi_probe(struct platform_device *dev) dev_err(&dev->dev, "Error allocating MSI bitmap\n"); goto error_out; } + ppc4xx_msi = *msi; ppc_md.setup_msi_irqs = ppc4xx_setup_msi_irqs; ppc_md.teardown_msi_irqs = ppc4xx_teardown_msi_irqs; -- 2.39.5