From: "Alastair D'Silva" <alastair@au1.ibm.com> To: alastair@d-silva.org Cc: "Benjamin Herrenschmidt" <benh@kernel.crashing.org>, "Paul Mackerras" <paulus@samba.org>, "Michael Ellerman" <mpe@ellerman.id.au>, "Frederic Barrat" <fbarrat@linux.ibm.com>, "Andrew Donnellan" <ajd@linux.ibm.com>, "Arnd Bergmann" <arnd@arndb.de>, "Greg Kroah-Hartman" <gregkh@linuxfoundation.org>, "Andrew Morton" <akpm@linux-foundation.org>, "Mauro Carvalho Chehab" <mchehab+samsung@kernel.org>, "David S. Miller" <davem@davemloft.net>, "Rob Herring" <robh@kernel.org>, "Anton Blanchard" <anton@ozlabs.org>, "Krzysztof Kozlowski" <krzk@kernel.org>, "Mahesh Salgaonkar" <mahesh@linux.vnet.ibm.com>, "Madhavan Srinivasan" <maddy@linux.vnet.ibm.com>, "Cédric Le Goater" <clg@kaod.org>, "Anju T Sudhakar" <anju@linux.vnet.ibm.com>, "Hari Bathini" <hbathini@linux.ibm.com>, "Thomas Gleixner" <tglx@linutronix.de>, "Greg Kurz" <groug@kaod.org>, "Nicholas Piggin" <npiggin@gmail.com>, "Masahiro Yamada" <yamada.masahiro@socionext.com>, "Alexey Kardashevskiy" <aik@ozlabs.ru>, linux-kernel@vger.kernel.org, linuxppc-dev@list Subject: [PATCH v2 07/27] ocxl: Add functions to map/unmap LPC memory Date: Tue, 3 Dec 2019 14:46:35 +1100 Message-ID: <20191203034655.51561-8-alastair@au1.ibm.com> (raw) In-Reply-To: <20191203034655.51561-1-alastair@au1.ibm.com> From: Alastair D'Silva <alastair@d-silva.org> Add functions to map/unmap LPC memory Signed-off-by: Alastair D'Silva <alastair@d-silva.org> --- drivers/misc/ocxl/config.c | 4 +++ drivers/misc/ocxl/core.c | 50 +++++++++++++++++++++++++++++++ drivers/misc/ocxl/ocxl_internal.h | 3 ++ include/misc/ocxl.h | 18 +++++++++++ 4 files changed, 75 insertions(+) diff --git a/drivers/misc/ocxl/config.c b/drivers/misc/ocxl/config.c index c8e19bfb5ef9..fb0c3b6f8312 100644 --- a/drivers/misc/ocxl/config.c +++ b/drivers/misc/ocxl/config.c @@ -568,6 +568,10 @@ static int read_afu_lpc_memory_info(struct pci_dev *dev, afu->special_purpose_mem_size = total_mem_size - lpc_mem_size; } + + dev_info(&dev->dev, "Probed LPC memory of %#llx bytes and special purpose memory of %#llx bytes\n", + afu->lpc_mem_size, afu->special_purpose_mem_size); + return 0; } diff --git a/drivers/misc/ocxl/core.c b/drivers/misc/ocxl/core.c index 2531c6cf19a0..98611faea219 100644 --- a/drivers/misc/ocxl/core.c +++ b/drivers/misc/ocxl/core.c @@ -210,6 +210,55 @@ static void unmap_mmio_areas(struct ocxl_afu *afu) release_fn_bar(afu->fn, afu->config.global_mmio_bar); } +int ocxl_afu_map_lpc_mem(struct ocxl_afu *afu) +{ + struct pci_dev *dev = to_pci_dev(afu->fn->dev.parent); + + if ((afu->config.lpc_mem_size + afu->config.special_purpose_mem_size) == 0) + return 0; + + afu->lpc_base_addr = ocxl_link_lpc_map(afu->fn->link, dev); + if (afu->lpc_base_addr == 0) + return -EINVAL; + + if (afu->config.lpc_mem_size) { + afu->lpc_res.start = afu->lpc_base_addr + afu->config.lpc_mem_offset; + afu->lpc_res.end = afu->lpc_res.start + afu->config.lpc_mem_size - 1; + } + + if (afu->config.special_purpose_mem_size) { + afu->special_purpose_res.start = afu->lpc_base_addr + + afu->config.special_purpose_mem_offset; + afu->special_purpose_res.end = afu->special_purpose_res.start + + afu->config.special_purpose_mem_size - 1; + } + + return 0; +} +EXPORT_SYMBOL_GPL(ocxl_afu_map_lpc_mem); + +struct resource *ocxl_afu_lpc_mem(struct ocxl_afu *afu) +{ + return &afu->lpc_res; +} +EXPORT_SYMBOL_GPL(ocxl_afu_lpc_mem); + +static void unmap_lpc_mem(struct ocxl_afu *afu) +{ + struct pci_dev *dev = to_pci_dev(afu->fn->dev.parent); + + if (afu->lpc_res.start || afu->special_purpose_res.start) { + void *link = afu->fn->link; + + ocxl_link_lpc_release(link, dev); + + afu->lpc_res.start = 0; + afu->lpc_res.end = 0; + afu->special_purpose_res.start = 0; + afu->special_purpose_res.end = 0; + } +} + static int configure_afu(struct ocxl_afu *afu, u8 afu_idx, struct pci_dev *dev) { int rc; @@ -251,6 +300,7 @@ static int configure_afu(struct ocxl_afu *afu, u8 afu_idx, struct pci_dev *dev) static void deconfigure_afu(struct ocxl_afu *afu) { + unmap_lpc_mem(afu); unmap_mmio_areas(afu); reclaim_afu_pasid(afu); reclaim_afu_actag(afu); diff --git a/drivers/misc/ocxl/ocxl_internal.h b/drivers/misc/ocxl/ocxl_internal.h index 20b417e00949..9f4b47900e62 100644 --- a/drivers/misc/ocxl/ocxl_internal.h +++ b/drivers/misc/ocxl/ocxl_internal.h @@ -52,6 +52,9 @@ struct ocxl_afu { void __iomem *global_mmio_ptr; u64 pp_mmio_start; void *private; + u64 lpc_base_addr; /* Covers both LPC & special purpose memory */ + struct resource lpc_res; + struct resource special_purpose_res; }; enum ocxl_context_status { diff --git a/include/misc/ocxl.h b/include/misc/ocxl.h index 06dd5839e438..6f7c02f0d5e3 100644 --- a/include/misc/ocxl.h +++ b/include/misc/ocxl.h @@ -212,6 +212,24 @@ int ocxl_irq_set_handler(struct ocxl_context *ctx, int irq_id, // AFU Metadata +/** + * Map the LPC system & special purpose memory for an AFU + * + * Do not call this during device discovery, as there may me multiple + * devices on a link, and the memory is mapped for the whole link, not + * just one device. It should only be called after all devices have + * registered their memory on the link. + * + * afu: The AFU that has the LPC memory to map + */ +extern int ocxl_afu_map_lpc_mem(struct ocxl_afu *afu); + +/** + * Get the physical address range of LPC memory for an AFU + * afu: The AFU associated with the LPC memory + */ +extern struct resource *ocxl_afu_lpc_mem(struct ocxl_afu *afu); + /** * Get a pointer to the config for an AFU * -- 2.23.0 _______________________________________________ Linux-nvdimm mailing list -- linux-nvdimm@lists.01.org To unsubscribe send an email to linux-nvdimm-leave@lists.01.org
next prev parent reply index Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-12-03 3:46 [PATCH v2 00/27] Add support for OpenCAPI SCM devices Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 01/27] memory_hotplug: Add a bounds check to __add_pages Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 02/27] nvdimm: remove prototypes for nonexistent functions Alastair D'Silva 2019-12-03 4:47 ` Andrew Donnellan 2019-12-04 0:10 ` Dan Williams 2020-01-23 21:49 ` Dan Williams 2019-12-03 3:46 ` [PATCH v2 03/27] powerpc: Add OPAL calls for LPC memory alloc/release Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 04/27] mm/memory_hotplug: Allow check_hotplug_memory_addressable to be called from drivers Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 05/27] powerpc: Map & release OpenCAPI LPC memory Alastair D'Silva 2020-01-09 14:41 ` Frederic Barrat 2020-01-21 6:46 ` Andrew Donnellan 2020-01-21 7:11 ` Greg Kurz 2020-02-14 11:09 ` Frederic Barrat 2020-02-18 23:44 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 06/27] ocxl: Tally up the LPC memory on a link & allow it to be mapped Alastair D'Silva 2020-01-09 14:48 ` Frederic Barrat 2020-02-03 12:37 ` Jonathan Cameron 2020-02-19 0:01 ` Alastair D'Silva 2019-12-03 3:46 ` Alastair D'Silva [this message] 2020-01-09 14:49 ` [PATCH v2 07/27] ocxl: Add functions to map/unmap LPC memory Frederic Barrat 2020-02-03 12:49 ` Jonathan Cameron 2020-02-19 2:39 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 08/27] ocxl: Save the device serial number in ocxl_fn Alastair D'Silva 2020-02-03 12:53 ` Jonathan Cameron 2020-02-19 4:03 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 09/27] ocxl: Free detached contexts in ocxl_context_detach_all() Alastair D'Silva 2020-01-09 14:54 ` Frederic Barrat 2019-12-03 3:46 ` [PATCH v2 10/27] nvdimm: Add driver for OpenCAPI Storage Class Memory Alastair D'Silva 2019-12-03 5:05 ` Alastair D'Silva 2020-02-03 13:20 ` Jonathan Cameron 2020-02-19 4:40 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 11/27] nvdimm/ocxl: Add register addresses & status values to header Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 12/27] nvdimm/ocxl: Read the capability registers & wait for device ready Alastair D'Silva 2020-02-03 13:23 ` Jonathan Cameron 2020-02-19 4:46 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 13/27] nvdimm/ocxl: Add support for Admin commands Alastair D'Silva 2020-02-03 14:18 ` Jonathan Cameron 2020-02-19 5:00 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 14/27] nvdimm/ocxl: Add support for near storage commands Alastair D'Silva 2020-02-03 14:22 ` Jonathan Cameron 2020-02-19 4:54 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 15/27] nvdimm/ocxl: Register a character device for userspace to interact with Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 16/27] nvdimm/ocxl: Implement the Read Error Log command Alastair D'Silva 2019-12-05 3:42 ` Alastair D'Silva 2019-12-05 19:34 ` kbuild test robot 2019-12-03 3:46 ` [PATCH v2 17/27] nvdimm/ocxl: Add controller dump IOCTLs Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 18/27] nvdimm/ocxl: Add an IOCTL to report controller statistics Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 19/27] nvdimm/ocxl: Forward events to userspace Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 20/27] nvdimm/ocxl: Add an IOCTL to request controller health & perf data Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 21/27] nvdimm/ocxl: Support firmware update via sysfs Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 22/27] nvdimm/ocxl: Implement the heartbeat command Alastair D'Silva 2020-02-03 15:11 ` Jonathan Cameron 2020-02-19 5:02 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 23/27] nvdimm/ocxl: Add debug IOCTLs Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 24/27] nvdimm/ocxl: Implement Overwrite Alastair D'Silva 2020-02-03 15:10 ` Jonathan Cameron 2020-02-19 5:13 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 25/27] nvdimm/ocxl: Expose SMART data via ndctl Alastair D'Silva 2019-12-16 0:15 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 26/27] powerpc: Enable OpenCAPI Storage Class Memory driver on bare metal Alastair D'Silva 2019-12-03 4:54 ` Andrew Donnellan 2019-12-03 4:57 ` Alastair D'Silva 2019-12-03 3:46 ` [PATCH v2 27/27] MAINTAINERS: Add myself & nvdimm/ocxl to ocxl Alastair D'Silva 2019-12-03 3:50 ` [PATCH v2 00/27] Add support for OpenCAPI SCM devices Matthew Wilcox 2019-12-03 4:01 ` Alastair D'Silva 2019-12-03 12:42 ` Matthew Wilcox 2019-12-04 0:15 ` Dan Williams
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