From patchwork Thu Sep 19 07:29:17 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharat Bhushan X-Patchwork-Id: 275889 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id A958B2C0269 for ; Thu, 19 Sep 2013 17:37:37 +1000 (EST) Received: from ch1outboundpool.messaging.microsoft.com (ch1ehsobe002.messaging.microsoft.com [216.32.181.182]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (Client CN "mail.global.frontbridge.com", Issuer "MSIT Machine Auth CA 2" (not verified)) by ozlabs.org (Postfix) with ESMTPS id 8DA082C010B for ; Thu, 19 Sep 2013 17:37:02 +1000 (EST) Received: from mail86-ch1-R.bigfish.com (10.43.68.232) by CH1EHSOBE016.bigfish.com (10.43.70.66) with Microsoft SMTP Server id 14.1.225.22; Thu, 19 Sep 2013 07:36:56 +0000 Received: from mail86-ch1 (localhost [127.0.0.1]) by mail86-ch1-R.bigfish.com (Postfix) with ESMTP id 387DF2A008C; Thu, 19 Sep 2013 07:36:56 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 8 X-BigFish: VS8(zzzz1f42h208ch1ee6h1de0h1fdah2073h1202h1e76h1d1ah1d2ah1fc6h1082kz70kd2iz1de098h1de097h8275bhz2dh2a8h839he5bhf0ah107ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1b2fh1fb3h1d0ch1d2eh1d3fh1dfeh1dffh1e1dh1e23h1fe8h1ff5h20cfi1155h) Received: from mail86-ch1 (localhost.localdomain [127.0.0.1]) by mail86-ch1 (MessageSwitch) id 1379576214498977_32685; Thu, 19 Sep 2013 07:36:54 +0000 (UTC) Received: from CH1EHSMHS037.bigfish.com (snatpool1.int.messaging.microsoft.com [10.43.68.247]) by mail86-ch1.bigfish.com (Postfix) with ESMTP id 7346D420060; Thu, 19 Sep 2013 07:36:54 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CH1EHSMHS037.bigfish.com (10.43.69.246) with Microsoft SMTP Server (TLS) id 14.16.227.3; Thu, 19 Sep 2013 07:36:53 +0000 Received: from az84smr01.freescale.net (10.64.34.197) by 039-SN1MMR1-003.039d.mgd.msft.net (10.84.1.16) with Microsoft SMTP Server (TLS) id 14.3.158.2; Thu, 19 Sep 2013 07:36:53 +0000 Received: from freescale.com ([10.232.15.72]) by az84smr01.freescale.net (8.14.3/8.14.0) with SMTP id r8J7akln029230; Thu, 19 Sep 2013 00:36:47 -0700 Received: by freescale.com (sSMTP sendmail emulation); Thu, 19 Sep 2013 12:59:33 +0530 From: Bharat Bhushan To: , , , , , , , , , Subject: [PATCH 1/7] powerpc: Add interface to get msi region information Date: Thu, 19 Sep 2013 12:59:17 +0530 Message-ID: <1379575763-2091-2-git-send-email-Bharat.Bhushan@freescale.com> X-Mailer: git-send-email 1.7.0.4 In-Reply-To: <1379575763-2091-1-git-send-email-Bharat.Bhushan@freescale.com> References: <1379575763-2091-1-git-send-email-Bharat.Bhushan@freescale.com> MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% Cc: Bharat Bhushan X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.16rc2 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" This patch adds interface to get following information - Number of MSI regions (which is number of MSI banks for powerpc). - Get the region address range: Physical page which have the address/addresses used for generating MSI interrupt and size of the page. These are required to create IOMMU (Freescale PAMU) mapping for devices which are directly assigned using VFIO. Signed-off-by: Bharat Bhushan --- arch/powerpc/include/asm/machdep.h | 8 +++++++ arch/powerpc/include/asm/pci.h | 2 + arch/powerpc/kernel/msi.c | 18 ++++++++++++++++ arch/powerpc/sysdev/fsl_msi.c | 39 +++++++++++++++++++++++++++++++++-- arch/powerpc/sysdev/fsl_msi.h | 11 ++++++++- drivers/pci/msi.c | 26 ++++++++++++++++++++++++ include/linux/msi.h | 8 +++++++ include/linux/pci.h | 13 ++++++++++++ 8 files changed, 120 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h index 8b48090..8d1b787 100644 --- a/arch/powerpc/include/asm/machdep.h +++ b/arch/powerpc/include/asm/machdep.h @@ -30,6 +30,7 @@ struct file; struct pci_controller; struct kimage; struct pci_host_bridge; +struct msi_region; struct machdep_calls { char *name; @@ -124,6 +125,13 @@ struct machdep_calls { int (*setup_msi_irqs)(struct pci_dev *dev, int nvec, int type); void (*teardown_msi_irqs)(struct pci_dev *dev); + + /* Returns the number of MSI regions (banks) */ + int (*msi_get_region_count)(void); + + /* Returns the requested region's address and size */ + int (*msi_get_region)(int region_num, + struct msi_region *region); #endif void (*restart)(char *cmd); diff --git a/arch/powerpc/include/asm/pci.h b/arch/powerpc/include/asm/pci.h index 6653f27..e575349 100644 --- a/arch/powerpc/include/asm/pci.h +++ b/arch/powerpc/include/asm/pci.h @@ -117,6 +117,8 @@ extern int pci_proc_domain(struct pci_bus *bus); #define arch_setup_msi_irqs arch_setup_msi_irqs #define arch_teardown_msi_irqs arch_teardown_msi_irqs #define arch_msi_check_device arch_msi_check_device +#define arch_msi_get_region_count arch_msi_get_region_count +#define arch_msi_get_region arch_msi_get_region struct vm_area_struct; /* Map a range of PCI memory or I/O space for a device into user space */ diff --git a/arch/powerpc/kernel/msi.c b/arch/powerpc/kernel/msi.c index 8bbc12d..1a67787 100644 --- a/arch/powerpc/kernel/msi.c +++ b/arch/powerpc/kernel/msi.c @@ -13,6 +13,24 @@ #include +int arch_msi_get_region_count(void) +{ + if (ppc_md.msi_get_region_count) { + pr_debug("msi: Using platform get_region_count routine.\n"); + return ppc_md.msi_get_region_count(); + } + return 0; +} + +int arch_msi_get_region(int region_num, struct msi_region *region) +{ + if (ppc_md.msi_get_region) { + pr_debug("msi: Using platform get_region routine.\n"); + return ppc_md.msi_get_region(region_num, region); + } + return 0; +} + int arch_msi_check_device(struct pci_dev* dev, int nvec, int type) { if (!ppc_md.setup_msi_irqs || !ppc_md.teardown_msi_irqs) { diff --git a/arch/powerpc/sysdev/fsl_msi.c b/arch/powerpc/sysdev/fsl_msi.c index ab02db3..ed045cb 100644 --- a/arch/powerpc/sysdev/fsl_msi.c +++ b/arch/powerpc/sysdev/fsl_msi.c @@ -96,6 +96,34 @@ static int fsl_msi_init_allocator(struct fsl_msi *msi_data) return 0; } +static int fsl_msi_get_region_count(void) +{ + int count = 0; + struct fsl_msi *msi_data; + + list_for_each_entry(msi_data, &msi_head, list) + count++; + + return count; +} + +static int fsl_msi_get_region(int region_num, struct msi_region *region) +{ + struct fsl_msi *msi_data; + + list_for_each_entry(msi_data, &msi_head, list) { + if (msi_data->bank_index == region_num) { + region->region_num = msi_data->bank_index; + /* Setting PAGE_SIZE as MSIIR is a 4 byte register */ + region->size = PAGE_SIZE; + region->addr = msi_data->msiir & ~(region->size - 1); + return 0; + } + } + + return -ENODEV; +} + static int fsl_msi_check_device(struct pci_dev *pdev, int nvec, int type) { if (type == PCI_CAP_ID_MSIX) @@ -137,7 +165,8 @@ static void fsl_compose_msi_msg(struct pci_dev *pdev, int hwirq, if (reg && (len == sizeof(u64))) address = be64_to_cpup(reg); else - address = fsl_pci_immrbar_base(hose) + msi_data->msiir_offset; + address = fsl_pci_immrbar_base(hose) + + (msi_data->msiir & 0xfffff); msg->address_lo = lower_32_bits(address); msg->address_hi = upper_32_bits(address); @@ -376,6 +405,7 @@ static int fsl_of_msi_probe(struct platform_device *dev) int len; u32 offset; static const u32 all_avail[] = { 0, NR_MSI_IRQS }; + static int bank_index; match = of_match_device(fsl_of_msi_ids, &dev->dev); if (!match) @@ -419,8 +449,8 @@ static int fsl_of_msi_probe(struct platform_device *dev) dev->dev.of_node->full_name); goto error_out; } - msi->msiir_offset = - features->msiir_offset + (res.start & 0xfffff); + msi->msiir = res.start + features->msiir_offset; + printk("msi->msiir = %llx\n", msi->msiir); } msi->feature = features->fsl_pic_ip; @@ -470,6 +500,7 @@ static int fsl_of_msi_probe(struct platform_device *dev) } } + msi->bank_index = bank_index++; list_add_tail(&msi->list, &msi_head); /* The multiple setting ppc_md.setup_msi_irqs will not harm things */ @@ -477,6 +508,8 @@ static int fsl_of_msi_probe(struct platform_device *dev) 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; + ppc_md.msi_get_region_count = fsl_msi_get_region_count; + ppc_md.msi_get_region = fsl_msi_get_region; } 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/fsl_msi.h b/arch/powerpc/sysdev/fsl_msi.h index 8225f86..6bd5cfc 100644 --- a/arch/powerpc/sysdev/fsl_msi.h +++ b/arch/powerpc/sysdev/fsl_msi.h @@ -29,12 +29,19 @@ struct fsl_msi { struct irq_domain *irqhost; unsigned long cascade_irq; - - u32 msiir_offset; /* Offset of MSIIR, relative to start of CCSR */ + dma_addr_t msiir; /* MSIIR Address in CCSR */ void __iomem *msi_regs; u32 feature; int msi_virqs[NR_MSI_REG]; + /* + * During probe each bank is assigned a index number. + * index number ranges from 0 to 2^32. + * Example MSI bank 1 = 0 + * MSI bank 2 = 1, and so on. + */ + int bank_index; + struct msi_bitmap bitmap; struct list_head list; /* support multiple MSI banks */ diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index aca7578..6d85c15 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -30,6 +30,20 @@ static int pci_msi_enable = 1; /* Arch hooks */ +#ifndef arch_msi_get_region_count +int arch_msi_get_region_count(void) +{ + return 0; +} +#endif + +#ifndef arch_msi_get_region +int arch_msi_get_region(int region_num, struct msi_region *region) +{ + return 0; +} +#endif + #ifndef arch_msi_check_device int arch_msi_check_device(struct pci_dev *dev, int nvec, int type) { @@ -903,6 +917,18 @@ void pci_disable_msi(struct pci_dev *dev) } EXPORT_SYMBOL(pci_disable_msi); +int msi_get_region_count(void) +{ + return arch_msi_get_region_count(); +} +EXPORT_SYMBOL(msi_get_region_count); + +int msi_get_region(int region_num, struct msi_region *region) +{ + return arch_msi_get_region(region_num, region); +} +EXPORT_SYMBOL(msi_get_region); + /** * pci_msix_table_size - return the number of device's MSI-X table entries * @dev: pointer to the pci_dev data structure of MSI-X device function diff --git a/include/linux/msi.h b/include/linux/msi.h index ee66f3a..ae32601 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -50,6 +50,12 @@ struct msi_desc { struct kobject kobj; }; +struct msi_region { + int region_num; + dma_addr_t addr; + size_t size; +}; + /* * The arch hook for setup up msi irqs */ @@ -58,5 +64,7 @@ void arch_teardown_msi_irq(unsigned int irq); int arch_setup_msi_irqs(struct pci_dev *dev, int nvec, int type); void arch_teardown_msi_irqs(struct pci_dev *dev); int arch_msi_check_device(struct pci_dev* dev, int nvec, int type); +int arch_msi_get_region_count(void); +int arch_msi_get_region(int region_num, struct msi_region *region); #endif /* LINUX_MSI_H */ diff --git a/include/linux/pci.h b/include/linux/pci.h index 186540d..2b26a59 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1126,6 +1126,7 @@ struct msix_entry { u16 entry; /* driver uses to specify entry, OS writes */ }; +struct msi_region; #ifndef CONFIG_PCI_MSI static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec) @@ -1168,6 +1169,16 @@ static inline int pci_msi_enabled(void) { return 0; } + +static inline int msi_get_region_count(void) +{ + return 0; +} + +static inline int msi_get_region(int region_num, struct msi_region *region) +{ + return 0; +} #else int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec); int pci_enable_msi_block_auto(struct pci_dev *dev, unsigned int *maxvec); @@ -1180,6 +1191,8 @@ void pci_disable_msix(struct pci_dev *dev); void msi_remove_pci_irq_vectors(struct pci_dev *dev); void pci_restore_msi_state(struct pci_dev *dev); int pci_msi_enabled(void); +int msi_get_region_count(void); +int msi_get_region(int region_num, struct msi_region *region); #endif #ifdef CONFIG_PCIEPORTBUS