| Message ID | 20191025044721.16617-5-alastair@au1.ibm.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | Add support for OpenCAPI SCM devices | expand |
On 25/10/19 3:46 pm, Alastair D'Silva wrote: > From: Alastair D'Silva <alastair@d-silva.org> > > This patch adds platform support to map & release 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 | 41 +++++++++++++++++++++++++++ > include/linux/memory_hotplug.h | 5 ++++ > mm/memory_hotplug.c | 3 +- > 4 files changed, 50 insertions(+), 1 deletion(-) > > 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..c6d4234e0aba 100644 > --- a/arch/powerpc/platforms/powernv/ocxl.c > +++ b/arch/powerpc/platforms/powernv/ocxl.c > @@ -475,6 +475,47 @@ 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; > + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; I think pci_dev_id() is the canonical way to do this? (same applies in release) > + u64 base_addr = 0; > + int rc; > + > + rc = opal_npu_mem_alloc(phb->opal_id, bdfn, size, &base_addr); > + if (rc) { > + dev_warn(&pdev->dev, > + "OPAL could not allocate LPC memory, rc=%d\n", rc); > + return 0; > + } > + > + base_addr = be64_to_cpu(base_addr); sparse doesn't like this, the way it's usually done is declare a __be64 variable, pass that to the opal call, then store the conversion in a regular u64 > + > + rc = check_hotplug_memory_addressable(base_addr >> PAGE_SHIFT, > + size >> PAGE_SHIFT); > + if (rc) > + 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; > + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; > + int rc; > + > + rc = opal_npu_mem_release(phb->opal_id, bdfn); > + if (rc) > + dev_warn(&pdev->dev, > + "OPAL reported rc=%d when releasing LPC memory\n", 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; > diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h > index f46ea71b4ffd..3f5f1a642abe 100644 > --- a/include/linux/memory_hotplug.h > +++ b/include/linux/memory_hotplug.h > @@ -339,6 +339,11 @@ static inline int remove_memory(int nid, u64 start, u64 size) > static inline void __remove_memory(int nid, u64 start, u64 size) {} > #endif /* CONFIG_MEMORY_HOTREMOVE */ > > +#if CONFIG_MEMORY_HOTPLUG_SPARSE This needs to be #ifdef. > +int check_hotplug_memory_addressable(unsigned long pfn, > + unsigned long nr_pages); > +#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ > + > extern void __ref free_area_init_core_hotplug(int nid); > extern int __add_memory(int nid, u64 start, u64 size); > extern int add_memory(int nid, u64 start, u64 size); > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index 2cecf07b396f..b39827dbd071 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -278,7 +278,7 @@ static int check_pfn_span(unsigned long pfn, unsigned long nr_pages, > return 0; > } > > -static int check_hotplug_memory_addressable(unsigned long pfn, > +int check_hotplug_memory_addressable(unsigned long pfn, > unsigned long nr_pages) > { > const u64 max_addr = PFN_PHYS(pfn + nr_pages) - 1; > @@ -294,6 +294,7 @@ static int check_hotplug_memory_addressable(unsigned long pfn, > > return 0; > } > +EXPORT_SYMBOL_GPL(check_hotplug_memory_addressable); This export seems unnecessary, you don't seem to be using this function in a module anywhere in this series AFAICT. Also it looks like a whitespace fix from removing the static ended up in patch #8 rather than here. > > /* > * Reasonably generic function for adding memory. It is >
On Tue, 2019-10-29 at 12:49 +1100, Andrew Donnellan wrote: > On 25/10/19 3:46 pm, Alastair D'Silva wrote: > > From: Alastair D'Silva <alastair@d-silva.org> > > > > This patch adds platform support to map & release 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 | 41 > > +++++++++++++++++++++++++++ > > include/linux/memory_hotplug.h | 5 ++++ > > mm/memory_hotplug.c | 3 +- > > 4 files changed, 50 insertions(+), 1 deletion(-) > > > > 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..c6d4234e0aba 100644 > > --- a/arch/powerpc/platforms/powernv/ocxl.c > > +++ b/arch/powerpc/platforms/powernv/ocxl.c > > @@ -475,6 +475,47 @@ 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; > > + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; > > I think pci_dev_id() is the canonical way to do this? (same applies > in > release) Thanks. > > > + u64 base_addr = 0; > > + int rc; > > + > > + rc = opal_npu_mem_alloc(phb->opal_id, bdfn, size, &base_addr); > > + if (rc) { > > + dev_warn(&pdev->dev, > > + "OPAL could not allocate LPC memory, rc=%d\n", > > rc); > > + return 0; > > + } > > + > > + base_addr = be64_to_cpu(base_addr); > > sparse doesn't like this, the way it's usually done is declare a > __be64 > variable, pass that to the opal call, then store the conversion in a > regular u64 > Ok. > > + > > + rc = check_hotplug_memory_addressable(base_addr >> PAGE_SHIFT, > > + size >> PAGE_SHIFT); > > + if (rc) > > + 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; > > + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; > > + int rc; > > + > > + rc = opal_npu_mem_release(phb->opal_id, bdfn); > > + if (rc) > > + dev_warn(&pdev->dev, > > + "OPAL reported rc=%d when releasing LPC > > memory\n", 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; > > diff --git a/include/linux/memory_hotplug.h > > b/include/linux/memory_hotplug.h > > index f46ea71b4ffd..3f5f1a642abe 100644 > > --- a/include/linux/memory_hotplug.h > > +++ b/include/linux/memory_hotplug.h > > @@ -339,6 +339,11 @@ static inline int remove_memory(int nid, u64 > > start, u64 size) > > static inline void __remove_memory(int nid, u64 start, u64 size) > > {} > > #endif /* CONFIG_MEMORY_HOTREMOVE */ > > > > +#if CONFIG_MEMORY_HOTPLUG_SPARSE > > This needs to be #ifdef. > Yup, 0 day caught that one too :) > > +int check_hotplug_memory_addressable(unsigned long pfn, > > + unsigned long nr_pages); > > +#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ > > + > > extern void __ref free_area_init_core_hotplug(int nid); > > extern int __add_memory(int nid, u64 start, u64 size); > > extern int add_memory(int nid, u64 start, u64 size); > > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > > index 2cecf07b396f..b39827dbd071 100644 > > --- a/mm/memory_hotplug.c > > +++ b/mm/memory_hotplug.c > > @@ -278,7 +278,7 @@ static int check_pfn_span(unsigned long pfn, > > unsigned long nr_pages, > > return 0; > > } > > > > -static int check_hotplug_memory_addressable(unsigned long pfn, > > +int check_hotplug_memory_addressable(unsigned long pfn, > > unsigned long nr_pages) > > { > > const u64 max_addr = PFN_PHYS(pfn + nr_pages) - 1; > > @@ -294,6 +294,7 @@ static int > > check_hotplug_memory_addressable(unsigned long pfn, > > > > return 0; > > } > > +EXPORT_SYMBOL_GPL(check_hotplug_memory_addressable); > > This export seems unnecessary, you don't seem to be using this > function > in a module anywhere in this series AFAICT. > This is used within this patch, in the map call. > Also it looks like a whitespace fix from removing the static ended up > in > patch #8 rather than here. Thanks. > > > > > /* > > * Reasonably generic function for adding memory. It is > >
On 29/10/19 1:44 pm, Alastair D'Silva wrote:
> This is used within this patch, in the map call.
But not in a module, which is what you need to export the symbol for.
Le 25/10/2019 à 06:46, Alastair D'Silva a écrit : > From: Alastair D'Silva <alastair@d-silva.org> > > This patch adds platform support to map & release 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 | 41 +++++++++++++++++++++++++++ > include/linux/memory_hotplug.h | 5 ++++ > mm/memory_hotplug.c | 3 +- > 4 files changed, 50 insertions(+), 1 deletion(-) > > 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..c6d4234e0aba 100644 > --- a/arch/powerpc/platforms/powernv/ocxl.c > +++ b/arch/powerpc/platforms/powernv/ocxl.c > @@ -475,6 +475,47 @@ 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; > + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; > + u64 base_addr = 0; > + int rc; > + > + rc = opal_npu_mem_alloc(phb->opal_id, bdfn, size, &base_addr); > + if (rc) { > + dev_warn(&pdev->dev, > + "OPAL could not allocate LPC memory, rc=%d\n", rc); > + return 0; > + } > + > + base_addr = be64_to_cpu(base_addr); > + > + rc = check_hotplug_memory_addressable(base_addr >> PAGE_SHIFT, > + size >> PAGE_SHIFT); > + if (rc) > + 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; > + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; > + int rc; > + > + rc = opal_npu_mem_release(phb->opal_id, bdfn); > + if (rc) > + dev_warn(&pdev->dev, > + "OPAL reported rc=%d when releasing LPC memory\n", 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; > diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h > index f46ea71b4ffd..3f5f1a642abe 100644 > --- a/include/linux/memory_hotplug.h > +++ b/include/linux/memory_hotplug.h > @@ -339,6 +339,11 @@ static inline int remove_memory(int nid, u64 start, u64 size) > static inline void __remove_memory(int nid, u64 start, u64 size) {} > #endif /* CONFIG_MEMORY_HOTREMOVE */ > > +#if CONFIG_MEMORY_HOTPLUG_SPARSE > +int check_hotplug_memory_addressable(unsigned long pfn, > + unsigned long nr_pages); > +#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ > + > extern void __ref free_area_init_core_hotplug(int nid); > extern int __add_memory(int nid, u64 start, u64 size); > extern int add_memory(int nid, u64 start, u64 size); > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index 2cecf07b396f..b39827dbd071 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -278,7 +278,7 @@ static int check_pfn_span(unsigned long pfn, unsigned long nr_pages, > return 0; > } > > -static int check_hotplug_memory_addressable(unsigned long pfn, > +int check_hotplug_memory_addressable(unsigned long pfn, > unsigned long nr_pages) > { > const u64 max_addr = PFN_PHYS(pfn + nr_pages) - 1; > @@ -294,6 +294,7 @@ static int check_hotplug_memory_addressable(unsigned long pfn, > > return 0; > } > +EXPORT_SYMBOL_GPL(check_hotplug_memory_addressable); Making check_hotplug_memory_addressable() visible in the kernel could be a separate patch, to make sure it gets the proper attention instead of being buried in a powerpc patch. Also, already mentioned, but it shouldn't be exported. > > /* > * Reasonably generic function for adding memory. It is >
"Alastair D'Silva" <alastair@au1.ibm.com> writes: > From: Alastair D'Silva <alastair@d-silva.org> > > This patch adds platform support to map & release 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 | 41 +++++++++++++++++++++++++++ > include/linux/memory_hotplug.h | 5 ++++ > mm/memory_hotplug.c | 3 +- > 4 files changed, 50 insertions(+), 1 deletion(-) > > 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..c6d4234e0aba 100644 > --- a/arch/powerpc/platforms/powernv/ocxl.c > +++ b/arch/powerpc/platforms/powernv/ocxl.c > @@ -475,6 +475,47 @@ 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; > + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; > + u64 base_addr = 0; > + int rc; > + > + rc = opal_npu_mem_alloc(phb->opal_id, bdfn, size, &base_addr); > + if (rc) { > + dev_warn(&pdev->dev, > + "OPAL could not allocate LPC memory, rc=%d\n", rc); > + return 0; > + } > + > + base_addr = be64_to_cpu(base_addr); > + > + rc = check_hotplug_memory_addressable(base_addr >> PAGE_SHIFT, > + size >> PAGE_SHIFT); > + if (rc) > + 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; > + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; > + int rc; > + > + rc = opal_npu_mem_release(phb->opal_id, bdfn); > + if (rc) > + dev_warn(&pdev->dev, > + "OPAL reported rc=%d when releasing LPC memory\n", 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; > diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h > index f46ea71b4ffd..3f5f1a642abe 100644 > --- a/include/linux/memory_hotplug.h > +++ b/include/linux/memory_hotplug.h > @@ -339,6 +339,11 @@ static inline int remove_memory(int nid, u64 start, u64 size) > static inline void __remove_memory(int nid, u64 start, u64 size) {} > #endif /* CONFIG_MEMORY_HOTREMOVE */ > > +#if CONFIG_MEMORY_HOTPLUG_SPARSE > +int check_hotplug_memory_addressable(unsigned long pfn, > + unsigned long nr_pages); > +#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ > + > extern void __ref free_area_init_core_hotplug(int nid); > extern int __add_memory(int nid, u64 start, u64 size); > extern int add_memory(int nid, u64 start, u64 size); > diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c > index 2cecf07b396f..b39827dbd071 100644 > --- a/mm/memory_hotplug.c > +++ b/mm/memory_hotplug.c > @@ -278,7 +278,7 @@ static int check_pfn_span(unsigned long pfn, unsigned long nr_pages, > return 0; > } > > -static int check_hotplug_memory_addressable(unsigned long pfn, > +int check_hotplug_memory_addressable(unsigned long pfn, > unsigned long nr_pages) > { > const u64 max_addr = PFN_PHYS(pfn + nr_pages) - 1; > @@ -294,6 +294,7 @@ static int check_hotplug_memory_addressable(unsigned long pfn, > > return 0; > } > +EXPORT_SYMBOL_GPL(check_hotplug_memory_addressable); > > /* > * Reasonably generic function for adding memory. It is > -- > 2.21.0 If you can rearrange the patch to show the callers in this same patch that would make it easy to follow. -aneesh
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..c6d4234e0aba 100644 --- a/arch/powerpc/platforms/powernv/ocxl.c +++ b/arch/powerpc/platforms/powernv/ocxl.c @@ -475,6 +475,47 @@ 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; + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; + u64 base_addr = 0; + int rc; + + rc = opal_npu_mem_alloc(phb->opal_id, bdfn, size, &base_addr); + if (rc) { + dev_warn(&pdev->dev, + "OPAL could not allocate LPC memory, rc=%d\n", rc); + return 0; + } + + base_addr = be64_to_cpu(base_addr); + + rc = check_hotplug_memory_addressable(base_addr >> PAGE_SHIFT, + size >> PAGE_SHIFT); + if (rc) + 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; + u32 bdfn = (pdev->bus->number << 8) | pdev->devfn; + int rc; + + rc = opal_npu_mem_release(phb->opal_id, bdfn); + if (rc) + dev_warn(&pdev->dev, + "OPAL reported rc=%d when releasing LPC memory\n", 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; diff --git a/include/linux/memory_hotplug.h b/include/linux/memory_hotplug.h index f46ea71b4ffd..3f5f1a642abe 100644 --- a/include/linux/memory_hotplug.h +++ b/include/linux/memory_hotplug.h @@ -339,6 +339,11 @@ static inline int remove_memory(int nid, u64 start, u64 size) static inline void __remove_memory(int nid, u64 start, u64 size) {} #endif /* CONFIG_MEMORY_HOTREMOVE */ +#if CONFIG_MEMORY_HOTPLUG_SPARSE +int check_hotplug_memory_addressable(unsigned long pfn, + unsigned long nr_pages); +#endif /* CONFIG_MEMORY_HOTPLUG_SPARSE */ + extern void __ref free_area_init_core_hotplug(int nid); extern int __add_memory(int nid, u64 start, u64 size); extern int add_memory(int nid, u64 start, u64 size); diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 2cecf07b396f..b39827dbd071 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -278,7 +278,7 @@ static int check_pfn_span(unsigned long pfn, unsigned long nr_pages, return 0; } -static int check_hotplug_memory_addressable(unsigned long pfn, +int check_hotplug_memory_addressable(unsigned long pfn, unsigned long nr_pages) { const u64 max_addr = PFN_PHYS(pfn + nr_pages) - 1; @@ -294,6 +294,7 @@ static int check_hotplug_memory_addressable(unsigned long pfn, return 0; } +EXPORT_SYMBOL_GPL(check_hotplug_memory_addressable); /* * Reasonably generic function for adding memory. It is