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>,
"Mahesh Salgaonkar" <mahesh@linux.vnet.ibm.com>,
"Allison Randal" <allison@lohutok.net>,
"Anju T Sudhakar" <anju@linux.vnet.ibm.com>,
"Vaibhav Jain" <vaibhav@linux.ibm.com>,
"Cédric Le Goater" <clg@kaod.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"David Gibson" <david@gibson.dropbear.id.au>,
"Alexey Kardashevskiy" <aik@ozlabs.ru>,
"Masahiro Yamada" <yamada.masahiro@socionext.com>,
"Nicholas Piggin" <npiggin@gmail.com>,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH 2/5] powerpc: Map & release OpenCAPI LPC memory
Date: Tue, 17 Sep 2019 11:42:58 +1000 [thread overview]
Message-ID: <20190917014307.30485-3-alastair@au1.ibm.com> (raw)
In-Reply-To: <20190917014307.30485-1-alastair@au1.ibm.com>
From: Alastair D'Silva <alastair@d-silva.org>
Map & release OpenCAPI LPC memory.
Signed-off-by: Alastair D'Silva <alastair@d-silva.org>
---
arch/powerpc/include/asm/pnv-ocxl.h | 2 ++
arch/powerpc/platforms/powernv/ocxl.c | 42 +++++++++++++++++++++++++++
2 files changed, 44 insertions(+)
diff --git a/arch/powerpc/include/asm/pnv-ocxl.h b/arch/powerpc/include/asm/pnv-ocxl.h
index 7de82647e761..f8f8ffb48aa8 100644
--- a/arch/powerpc/include/asm/pnv-ocxl.h
+++ b/arch/powerpc/include/asm/pnv-ocxl.h
@@ -32,5 +32,7 @@ extern int pnv_ocxl_spa_remove_pe_from_cache(void *platform_data, int pe_handle)
extern int pnv_ocxl_alloc_xive_irq(u32 *irq, u64 *trigger_addr);
extern void pnv_ocxl_free_xive_irq(u32 irq);
+extern u64 pnv_ocxl_platform_lpc_setup(struct pci_dev *pdev, u64 size);
+extern void pnv_ocxl_platform_lpc_release(struct pci_dev *pdev);
#endif /* _ASM_PNV_OCXL_H */
diff --git a/arch/powerpc/platforms/powernv/ocxl.c b/arch/powerpc/platforms/powernv/ocxl.c
index 8c65aacda9c8..81393728d6a3 100644
--- a/arch/powerpc/platforms/powernv/ocxl.c
+++ b/arch/powerpc/platforms/powernv/ocxl.c
@@ -475,6 +475,48 @@ void pnv_ocxl_spa_release(void *platform_data)
}
EXPORT_SYMBOL_GPL(pnv_ocxl_spa_release);
+u64 pnv_ocxl_platform_lpc_setup(struct pci_dev *pdev, u64 size)
+{
+ 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);
+ u32 bdfn = (pdn->busno << 8) | pdn->devfn;
+ u64 base_addr = 0;
+
+ int rc = opal_npu_mem_alloc(phb->opal_id, bdfn, size, &base_addr);
+
+ WARN_ON(rc);
+
+ base_addr = be64_to_cpu(base_addr);
+
+ rc = check_hotplug_memory_addressable(base_addr, base_addr + size);
+ if (rc) {
+ dev_warn(&pdev->dev,
+ "LPC memory range 0x%llx-0x%llx is not fully addressable",
+ base_addr, base_addr + size - 1);
+ return 0;
+ }
+
+
+ return base_addr;
+}
+EXPORT_SYMBOL_GPL(pnv_ocxl_platform_lpc_setup);
+
+void pnv_ocxl_platform_lpc_release(struct pci_dev *pdev)
+{
+ 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);
+ u32 bdfn;
+ int rc;
+
+ bdfn = (pdn->busno << 8) | pdn->devfn;
+ rc = opal_npu_mem_release(phb->opal_id, bdfn);
+ WARN_ON(rc);
+}
+EXPORT_SYMBOL_GPL(pnv_ocxl_platform_lpc_release);
+
+
int pnv_ocxl_spa_remove_pe_from_cache(void *platform_data, int pe_handle)
{
struct spa_data *data = (struct spa_data *) platform_data;
--
2.21.0
next prev parent reply other threads:[~2019-09-17 1:47 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-17 1:42 [PATCH 0/5] ocxl: Allow external drivers to access LPC memory Alastair D'Silva
2019-09-17 1:42 ` [PATCH 1/5] powerpc: Add OPAL calls for LPC memory alloc/release Alastair D'Silva
2019-09-25 11:41 ` Andrew Donnellan
2019-09-17 1:42 ` Alastair D'Silva [this message]
2019-09-17 4:22 ` [PATCH 2/5] powerpc: Map & release OpenCAPI LPC memory kbuild test robot
2019-09-18 14:03 ` Frederic Barrat
2019-09-19 0:58 ` Alastair D'Silva
2019-09-19 8:38 ` Frederic Barrat
2019-09-17 1:42 ` [PATCH 3/5] ocxl: Tally up the LPC memory on a link & allow it to be mapped Alastair D'Silva
2019-09-18 14:02 ` Frederic Barrat
2019-09-19 4:55 ` Alastair D'Silva
2019-09-19 8:41 ` Frederic Barrat
2019-09-17 1:43 ` [PATCH 4/5] ocxl: Add functions to map/unmap LPC memory Alastair D'Silva
2019-09-17 7:36 ` Christoph Hellwig
2019-09-18 14:03 ` Frederic Barrat
2019-09-19 1:19 ` Alastair D'Silva
2019-09-19 1:24 ` Alastair D'Silva
2019-09-23 11:39 ` Frederic Barrat
2019-09-26 2:59 ` Alastair D'Silva
2019-09-17 1:43 ` [PATCH 5/5] ocxl: Provide additional metadata to userspace Alastair D'Silva
2019-09-17 6:35 ` Alastair D'Silva
2019-09-17 11:30 ` kbuild test robot
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