| Message ID | 163867b893124434dfe3e13c6ba2f081c309e96f.camel@linux.ibm.com |
|---|---|
| State | New |
| Headers | show |
| Series | Enable VAS and NX-GZIP support on powerVM | expand |
Excerpts from Haren Myneni's message of April 18, 2021 7:02 am: > > Using the same /dev/crypto/nx-gzip interface for both powerNV and > pseries. The pseries NX driver will use the powernv VAS API ? > So this patch creates platforms/book3s/ and moves VAS API > to that directory. The actual functionality is not changed. > > Common interface functions such as open, window open ioctl, mmap > and close are moved to arch/powerpc/platforms/book3s/vas-api.c > Added hooks to call platform specific code, but the underline > powerNV code in these functions is not changed. Even so, could you do one patch that just moves, and another that adds the ops struct? > > Signed-off-by: Haren Myneni <haren@linux.ibm.com> > --- > arch/powerpc/include/asm/vas.h | 22 ++++++- > arch/powerpc/platforms/Kconfig | 1 + > arch/powerpc/platforms/Makefile | 1 + > arch/powerpc/platforms/book3s/Kconfig | 15 +++++ > arch/powerpc/platforms/book3s/Makefile | 2 + The usual place for these would be arch/powerpc/sysdev/vas. E.g., see arch/powerpc/sysdev/xive. > .../platforms/{powernv => book3s}/vas-api.c | 64 ++++++++++-------- > arch/powerpc/platforms/powernv/Kconfig | 14 ---- > arch/powerpc/platforms/powernv/Makefile | 2 +- > arch/powerpc/platforms/powernv/vas-window.c | 66 +++++++++++++++++++ > 9 files changed, 143 insertions(+), 44 deletions(-) > create mode 100644 arch/powerpc/platforms/book3s/Kconfig > create mode 100644 arch/powerpc/platforms/book3s/Makefile > rename arch/powerpc/platforms/{powernv => book3s}/vas-api.c (83%) > > diff --git a/arch/powerpc/include/asm/vas.h b/arch/powerpc/include/asm/vas.h > index 41f73fae7ab8..6bbade60d8f4 100644 > --- a/arch/powerpc/include/asm/vas.h > +++ b/arch/powerpc/include/asm/vas.h > @@ -5,6 +5,8 @@ > > #ifndef _ASM_POWERPC_VAS_H > #define _ASM_POWERPC_VAS_H > +#include <uapi/asm/vas-api.h> > + > > struct vas_window; > > @@ -48,6 +50,16 @@ enum vas_cop_type { > VAS_COP_TYPE_MAX, > }; > > +/* > + * User space window operations used for powernv and powerVM > + */ > +struct vas_user_win_ops { > + struct vas_window * (*open_win)(struct vas_tx_win_open_attr *, > + enum vas_cop_type); > + u64 (*paste_addr)(void *); > + int (*close_win)(void *); > +}; > + > /* > * Receive window attributes specified by the (in-kernel) owner of window. > */ > @@ -161,6 +173,9 @@ int vas_copy_crb(void *crb, int offset); > * assumed to be true for NX windows. > */ > int vas_paste_crb(struct vas_window *win, int offset, bool re); > +int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, > + const char *name); > +void vas_unregister_api_powernv(void); > > /* > * Register / unregister coprocessor type to VAS API which will be exported > @@ -170,8 +185,9 @@ int vas_paste_crb(struct vas_window *win, int offset, bool re); > * Only NX GZIP coprocessor type is supported now, but this API can be > * used for others in future. > */ > -int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, > - const char *name); > -void vas_unregister_api_powernv(void); > +int vas_register_coproc_api(struct module *mod, enum vas_cop_type cop_type, > + const char *name, > + struct vas_user_win_ops *vops); > +void vas_unregister_coproc_api(void); > > #endif /* __ASM_POWERPC_VAS_H */ > diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig > index 7a5e8f4541e3..594544a65b02 100644 > --- a/arch/powerpc/platforms/Kconfig > +++ b/arch/powerpc/platforms/Kconfig > @@ -20,6 +20,7 @@ source "arch/powerpc/platforms/embedded6xx/Kconfig" > source "arch/powerpc/platforms/44x/Kconfig" > source "arch/powerpc/platforms/40x/Kconfig" > source "arch/powerpc/platforms/amigaone/Kconfig" > +source "arch/powerpc/platforms/book3s/Kconfig" > > config KVM_GUEST > bool "KVM Guest support" > diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile > index 143d4417f6cc..0e75d7df387b 100644 > --- a/arch/powerpc/platforms/Makefile > +++ b/arch/powerpc/platforms/Makefile > @@ -22,3 +22,4 @@ obj-$(CONFIG_PPC_CELL) += cell/ > obj-$(CONFIG_PPC_PS3) += ps3/ > obj-$(CONFIG_EMBEDDED6xx) += embedded6xx/ > obj-$(CONFIG_AMIGAONE) += amigaone/ > +obj-$(CONFIG_PPC_BOOK3S) += book3s/ > diff --git a/arch/powerpc/platforms/book3s/Kconfig b/arch/powerpc/platforms/book3s/Kconfig > new file mode 100644 > index 000000000000..51e14db83a79 > --- /dev/null > +++ b/arch/powerpc/platforms/book3s/Kconfig > @@ -0,0 +1,15 @@ > +# SPDX-License-Identifier: GPL-2.0 > +config PPC_VAS > + bool "IBM Virtual Accelerator Switchboard (VAS)" > + depends on PPC_POWERNV && PPC_64K_PAGES > + default y > + help > + This enables support for IBM Virtual Accelerator Switchboard (VAS). > + > + VAS allows accelerators in co-processors like NX-GZIP and NX-842 > + to be accessible to kernel subsystems and user processes. > + VAS adapters are found in POWER9 and later based systems. > + The user mode NX-GZIP support is added on P9 for powerNV and on > + P10 for powerVM. > + > + If unsure, say "N". > diff --git a/arch/powerpc/platforms/book3s/Makefile b/arch/powerpc/platforms/book3s/Makefile > new file mode 100644 > index 000000000000..e790f1910f61 > --- /dev/null > +++ b/arch/powerpc/platforms/book3s/Makefile > @@ -0,0 +1,2 @@ > +# SPDX-License-Identifier: GPL-2.0-only > +obj-$(CONFIG_PPC_VAS) += vas-api.o > diff --git a/arch/powerpc/platforms/powernv/vas-api.c b/arch/powerpc/platforms/book3s/vas-api.c > similarity index 83% > rename from arch/powerpc/platforms/powernv/vas-api.c > rename to arch/powerpc/platforms/book3s/vas-api.c > index 72d8ce39e56c..05d7b99acf41 100644 > --- a/arch/powerpc/platforms/powernv/vas-api.c > +++ b/arch/powerpc/platforms/book3s/vas-api.c > @@ -4,15 +4,20 @@ > * Copyright (C) 2019 Haren Myneni, IBM Corp > */ > > +#include <linux/module.h> > #include <linux/kernel.h> > #include <linux/device.h> > #include <linux/cdev.h> > #include <linux/fs.h> > #include <linux/slab.h> > #include <linux/uaccess.h> > +#include <linux/kthread.h> > +#include <linux/sched/signal.h> > +#include <linux/sched/mm.h> > +#include <linux/mmu_context.h> > #include <asm/vas.h> > +#include <asm/icswx.h> > #include <uapi/asm/vas-api.h> > -#include "vas.h" > > /* > * The driver creates the device node that can be used as follows: > @@ -42,6 +47,7 @@ static struct coproc_dev { > dev_t devt; > struct class *class; > enum vas_cop_type cop_type; > + struct vas_user_win_ops *vops; > } coproc_device; > > struct coproc_instance { > @@ -72,11 +78,10 @@ static int coproc_open(struct inode *inode, struct file *fp) > static int coproc_ioc_tx_win_open(struct file *fp, unsigned long arg) > { > void __user *uptr = (void __user *)arg; > - struct vas_tx_win_attr txattr = {}; > struct vas_tx_win_open_attr uattr; > struct coproc_instance *cp_inst; > struct vas_window *txwin; > - int rc, vasid; > + int rc; > > cp_inst = fp->private_data; > > @@ -93,27 +98,20 @@ static int coproc_ioc_tx_win_open(struct file *fp, unsigned long arg) > } > > if (uattr.version != 1) { > - pr_err("Invalid version\n"); > + pr_err("Invalid window open API version\n"); > return -EINVAL; > } > > - vasid = uattr.vas_id; > - > - vas_init_tx_win_attr(&txattr, cp_inst->coproc->cop_type); > - > - txattr.lpid = mfspr(SPRN_LPID); > - txattr.pidr = mfspr(SPRN_PID); > - txattr.user_win = true; > - txattr.rsvd_txbuf_count = false; > - txattr.pswid = false; > - > - pr_devel("Pid %d: Opening txwin, PIDR %ld\n", txattr.pidr, > - mfspr(SPRN_PID)); > + if (!cp_inst->coproc->vops && !cp_inst->coproc->vops->open_win) { > + pr_err("VAS API is not registered\n"); > + return -EACCES; > + } > > - txwin = vas_tx_win_open(vasid, cp_inst->coproc->cop_type, &txattr); > + txwin = cp_inst->coproc->vops->open_win(&uattr, > + cp_inst->coproc->cop_type); > if (IS_ERR(txwin)) { > - pr_err("%s() vas_tx_win_open() failed, %ld\n", __func__, > - PTR_ERR(txwin)); > + pr_err("%s() VAS window open failed, %ld\n", __func__, > + PTR_ERR(txwin)); > return PTR_ERR(txwin); > } > > @@ -125,9 +123,14 @@ static int coproc_ioc_tx_win_open(struct file *fp, unsigned long arg) > static int coproc_release(struct inode *inode, struct file *fp) > { > struct coproc_instance *cp_inst = fp->private_data; > + int rc = 0; > > if (cp_inst->txwin) { > - vas_win_close(cp_inst->txwin); > + if (cp_inst->coproc->vops && cp_inst->coproc->vops->close_win) { > + rc = cp_inst->coproc->vops->close_win(cp_inst->txwin); > + if (rc) > + return rc; > + } > cp_inst->txwin = NULL; > } > > @@ -168,7 +171,17 @@ static int coproc_mmap(struct file *fp, struct vm_area_struct *vma) > return -EINVAL; > } > > - vas_win_paste_addr(txwin, &paste_addr, NULL); > + if (!cp_inst->coproc->vops && !cp_inst->coproc->vops->paste_addr) { > + pr_err("%s(): VAS API is not registered\n", __func__); > + return -EACCES; > + } > + > + paste_addr = cp_inst->coproc->vops->paste_addr(txwin); > + if (!paste_addr) { > + pr_err("%s(): Window paste address failed\n", __func__); > + return -EINVAL; > + } > + > pfn = paste_addr >> PAGE_SHIFT; > > /* flags, page_prot from cxl_mmap(), except we want cachable */ > @@ -207,8 +220,8 @@ static struct file_operations coproc_fops = { > * Supporting only nx-gzip coprocessor type now, but this API code > * extended to other coprocessor types later. > */ > -int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, > - const char *name) > +int vas_register_coproc_api(struct module *mod, enum vas_cop_type cop_type, > + const char *name, struct vas_user_win_ops *vops) > { > int rc = -EINVAL; > dev_t devno; > @@ -230,6 +243,7 @@ int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, > } > coproc_device.class->devnode = coproc_devnode; > coproc_device.cop_type = cop_type; > + coproc_device.vops = vops; > > coproc_fops.owner = mod; > cdev_init(&coproc_device.cdev, &coproc_fops); > @@ -262,9 +276,8 @@ int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, > unregister_chrdev_region(coproc_device.devt, 1); > return rc; > } > -EXPORT_SYMBOL_GPL(vas_register_api_powernv); > > -void vas_unregister_api_powernv(void) > +void vas_unregister_coproc_api(void) > { > dev_t devno; > > @@ -275,4 +288,3 @@ void vas_unregister_api_powernv(void) > class_destroy(coproc_device.class); > unregister_chrdev_region(coproc_device.devt, 1); > } > -EXPORT_SYMBOL_GPL(vas_unregister_api_powernv); > diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig > index 619b093a0657..043eefbbdd28 100644 > --- a/arch/powerpc/platforms/powernv/Kconfig > +++ b/arch/powerpc/platforms/powernv/Kconfig > @@ -33,20 +33,6 @@ config PPC_MEMTRACE > Enabling this option allows for runtime allocation of memory (RAM) > for hardware tracing. > > -config PPC_VAS > - bool "IBM Virtual Accelerator Switchboard (VAS)" > - depends on PPC_POWERNV && PPC_64K_PAGES > - default y > - help > - This enables support for IBM Virtual Accelerator Switchboard (VAS). > - > - VAS allows accelerators in co-processors like NX-GZIP and NX-842 > - to be accessible to kernel subsystems and user processes. > - > - VAS adapters are found in POWER9 based systems. > - > - If unsure, say N. > - > config SCOM_DEBUGFS > bool "Expose SCOM controllers via debugfs" > depends on DEBUG_FS > diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile > index 2eb6ae150d1f..c747a1f1d25b 100644 > --- a/arch/powerpc/platforms/powernv/Makefile > +++ b/arch/powerpc/platforms/powernv/Makefile > @@ -18,7 +18,7 @@ obj-$(CONFIG_MEMORY_FAILURE) += opal-memory-errors.o > obj-$(CONFIG_OPAL_PRD) += opal-prd.o > obj-$(CONFIG_PERF_EVENTS) += opal-imc.o > obj-$(CONFIG_PPC_MEMTRACE) += memtrace.o > -obj-$(CONFIG_PPC_VAS) += vas.o vas-window.o vas-debug.o vas-fault.o vas-api.o > +obj-$(CONFIG_PPC_VAS) += vas.o vas-window.o vas-debug.o vas-fault.o > obj-$(CONFIG_OCXL_BASE) += ocxl.o > obj-$(CONFIG_SCOM_DEBUGFS) += opal-xscom.o > obj-$(CONFIG_PPC_SECURE_BOOT) += opal-secvar.o > diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c > index 5f5fe63a3d1c..b973dd574b47 100644 > --- a/arch/powerpc/platforms/powernv/vas-window.c > +++ b/arch/powerpc/platforms/powernv/vas-window.c > @@ -16,6 +16,8 @@ > #include <linux/mmu_context.h> > #include <asm/switch_to.h> > #include <asm/ppc-opcode.h> > +#include <asm/vas.h> > +#include <uapi/asm/vas-api.h> > #include "vas.h" > #include "copy-paste.h" > > @@ -1441,3 +1443,67 @@ struct vas_window *vas_pswid_to_window(struct vas_instance *vinst, > > return window; > } > + > +static struct vas_window *vas_user_win_open(struct vas_tx_win_open_attr *uattr, > + enum vas_cop_type cop_type) > +{ > + struct vas_tx_win_attr txattr = {}; > + > + vas_init_tx_win_attr(&txattr, cop_type); > + > + txattr.lpid = mfspr(SPRN_LPID); > + txattr.pidr = mfspr(SPRN_PID); > + txattr.user_win = true; > + txattr.rsvd_txbuf_count = false; > + txattr.pswid = false; > + > + pr_devel("Pid %d: Opening txwin, PIDR %ld\n", txattr.pidr, > + mfspr(SPRN_PID)); > + > + return vas_tx_win_open(uattr->vas_id, cop_type, &txattr); > +} > + > +static u64 vas_user_win_paste_addr(void *addr) > +{ > + u64 paste_addr; > + > + vas_win_paste_addr((struct vas_window *)addr, &paste_addr, NULL); > + > + return paste_addr; > +} > + > +static int vas_user_win_close(void *addr) > +{ > + struct vas_window *txwin = addr; > + > + vas_win_close(txwin); > + > + return 0; > +} > + > +static struct vas_user_win_ops vops = { > + .open_win = vas_user_win_open, > + .paste_addr = vas_user_win_paste_addr, > + .close_win = vas_user_win_close, > +}; > + > +/* > + * Supporting only nx-gzip coprocessor type now, but this API code > + * extended to other coprocessor types later. > + */ > +int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, > + const char *name) > +{ > + int rc; > + > + rc = vas_register_coproc_api(mod, cop_type, name, &vops); > + > + return rc; > +} > +EXPORT_SYMBOL_GPL(vas_register_api_powernv); > + > +void vas_unregister_api_powernv(void) > +{ > + vas_unregister_coproc_api(); > +} > +EXPORT_SYMBOL_GPL(vas_unregister_api_powernv); > -- > 2.18.2 > > >
On Mon, 2021-05-10 at 15:19 +1000, Nicholas Piggin wrote: > Excerpts from Haren Myneni's message of April 18, 2021 7:02 am: > > Using the same /dev/crypto/nx-gzip interface for both powerNV and > > pseries. > > The pseries NX driver will use the powernv VAS API ? Yes, both powerNV and pseries drivers use same VAS API. > > > So this patch creates platforms/book3s/ and moves VAS API > > to that directory. The actual functionality is not changed. > > > > Common interface functions such as open, window open ioctl, mmap > > and close are moved to arch/powerpc/platforms/book3s/vas-api.c > > Added hooks to call platform specific code, but the underline > > powerNV code in these functions is not changed. > > Even so, could you do one patch that just moves, and another that > adds the ops struct? Sure, I will create separate patches. > > > Signed-off-by: Haren Myneni <haren@linux.ibm.com> > > --- > > arch/powerpc/include/asm/vas.h | 22 ++++++- > > arch/powerpc/platforms/Kconfig | 1 + > > arch/powerpc/platforms/Makefile | 1 + > > arch/powerpc/platforms/book3s/Kconfig | 15 +++++ > > arch/powerpc/platforms/book3s/Makefile | 2 + > > The usual place for these would be arch/powerpc/sysdev/vas. E.g., see > arch/powerpc/sysdev/xive. It was recommended to create book3s and move common vas-api code. > > > .../platforms/{powernv => book3s}/vas-api.c | 64 ++++++++++----- > > --- > > arch/powerpc/platforms/powernv/Kconfig | 14 ---- > > arch/powerpc/platforms/powernv/Makefile | 2 +- > > arch/powerpc/platforms/powernv/vas-window.c | 66 > > +++++++++++++++++++ > > 9 files changed, 143 insertions(+), 44 deletions(-) > > create mode 100644 arch/powerpc/platforms/book3s/Kconfig > > create mode 100644 arch/powerpc/platforms/book3s/Makefile > > rename arch/powerpc/platforms/{powernv => book3s}/vas-api.c (83%) > > > > diff --git a/arch/powerpc/include/asm/vas.h > > b/arch/powerpc/include/asm/vas.h > > index 41f73fae7ab8..6bbade60d8f4 100644 > > --- a/arch/powerpc/include/asm/vas.h > > +++ b/arch/powerpc/include/asm/vas.h > > @@ -5,6 +5,8 @@ > > > > #ifndef _ASM_POWERPC_VAS_H > > #define _ASM_POWERPC_VAS_H > > +#include <uapi/asm/vas-api.h> > > + > > > > struct vas_window; > > > > @@ -48,6 +50,16 @@ enum vas_cop_type { > > VAS_COP_TYPE_MAX, > > }; > > > > +/* > > + * User space window operations used for powernv and powerVM > > + */ > > +struct vas_user_win_ops { > > + struct vas_window * (*open_win)(struct vas_tx_win_open_attr *, > > + enum vas_cop_type); > > + u64 (*paste_addr)(void *); > > + int (*close_win)(void *); > > +}; > > + > > /* > > * Receive window attributes specified by the (in-kernel) owner of > > window. > > */ > > @@ -161,6 +173,9 @@ int vas_copy_crb(void *crb, int offset); > > * assumed to be true for NX windows. > > */ > > int vas_paste_crb(struct vas_window *win, int offset, bool re); > > +int vas_register_api_powernv(struct module *mod, enum vas_cop_type > > cop_type, > > + const char *name); > > +void vas_unregister_api_powernv(void); > > > > /* > > * Register / unregister coprocessor type to VAS API which will be > > exported > > @@ -170,8 +185,9 @@ int vas_paste_crb(struct vas_window *win, int > > offset, bool re); > > * Only NX GZIP coprocessor type is supported now, but this API > > can be > > * used for others in future. > > */ > > -int vas_register_api_powernv(struct module *mod, enum vas_cop_type > > cop_type, > > - const char *name); > > -void vas_unregister_api_powernv(void); > > +int vas_register_coproc_api(struct module *mod, enum vas_cop_type > > cop_type, > > + const char *name, > > + struct vas_user_win_ops *vops); > > +void vas_unregister_coproc_api(void); > > > > #endif /* __ASM_POWERPC_VAS_H */ > > diff --git a/arch/powerpc/platforms/Kconfig > > b/arch/powerpc/platforms/Kconfig > > index 7a5e8f4541e3..594544a65b02 100644 > > --- a/arch/powerpc/platforms/Kconfig > > +++ b/arch/powerpc/platforms/Kconfig > > @@ -20,6 +20,7 @@ source > > "arch/powerpc/platforms/embedded6xx/Kconfig" > > source "arch/powerpc/platforms/44x/Kconfig" > > source "arch/powerpc/platforms/40x/Kconfig" > > source "arch/powerpc/platforms/amigaone/Kconfig" > > +source "arch/powerpc/platforms/book3s/Kconfig" > > > > config KVM_GUEST > > bool "KVM Guest support" > > diff --git a/arch/powerpc/platforms/Makefile > > b/arch/powerpc/platforms/Makefile > > index 143d4417f6cc..0e75d7df387b 100644 > > --- a/arch/powerpc/platforms/Makefile > > +++ b/arch/powerpc/platforms/Makefile > > @@ -22,3 +22,4 @@ obj-$(CONFIG_PPC_CELL) += cell/ > > obj-$(CONFIG_PPC_PS3) += ps3/ > > obj-$(CONFIG_EMBEDDED6xx) += embedded6xx/ > > obj-$(CONFIG_AMIGAONE) += amigaone/ > > +obj-$(CONFIG_PPC_BOOK3S) += book3s/ > > diff --git a/arch/powerpc/platforms/book3s/Kconfig > > b/arch/powerpc/platforms/book3s/Kconfig > > new file mode 100644 > > index 000000000000..51e14db83a79 > > --- /dev/null > > +++ b/arch/powerpc/platforms/book3s/Kconfig > > @@ -0,0 +1,15 @@ > > +# SPDX-License-Identifier: GPL-2.0 > > +config PPC_VAS > > + bool "IBM Virtual Accelerator Switchboard (VAS)" > > + depends on PPC_POWERNV && PPC_64K_PAGES > > + default y > > + help > > + This enables support for IBM Virtual Accelerator Switchboard > > (VAS). > > + > > + VAS allows accelerators in co-processors like NX-GZIP and NX- > > 842 > > + to be accessible to kernel subsystems and user processes. > > + VAS adapters are found in POWER9 and later based systems. > > + The user mode NX-GZIP support is added on P9 for powerNV and > > on > > + P10 for powerVM. > > + > > + If unsure, say "N". > > diff --git a/arch/powerpc/platforms/book3s/Makefile > > b/arch/powerpc/platforms/book3s/Makefile > > new file mode 100644 > > index 000000000000..e790f1910f61 > > --- /dev/null > > +++ b/arch/powerpc/platforms/book3s/Makefile > > @@ -0,0 +1,2 @@ > > +# SPDX-License-Identifier: GPL-2.0-only > > +obj-$(CONFIG_PPC_VAS) += vas-api.o > > diff --git a/arch/powerpc/platforms/powernv/vas-api.c > > b/arch/powerpc/platforms/book3s/vas-api.c > > similarity index 83% > > rename from arch/powerpc/platforms/powernv/vas-api.c > > rename to arch/powerpc/platforms/book3s/vas-api.c > > index 72d8ce39e56c..05d7b99acf41 100644 > > --- a/arch/powerpc/platforms/powernv/vas-api.c > > +++ b/arch/powerpc/platforms/book3s/vas-api.c > > @@ -4,15 +4,20 @@ > > * Copyright (C) 2019 Haren Myneni, IBM Corp > > */ > > > > +#include <linux/module.h> > > #include <linux/kernel.h> > > #include <linux/device.h> > > #include <linux/cdev.h> > > #include <linux/fs.h> > > #include <linux/slab.h> > > #include <linux/uaccess.h> > > +#include <linux/kthread.h> > > +#include <linux/sched/signal.h> > > +#include <linux/sched/mm.h> > > +#include <linux/mmu_context.h> > > #include <asm/vas.h> > > +#include <asm/icswx.h> > > #include <uapi/asm/vas-api.h> > > -#include "vas.h" > > > > /* > > * The driver creates the device node that can be used as follows: > > @@ -42,6 +47,7 @@ static struct coproc_dev { > > dev_t devt; > > struct class *class; > > enum vas_cop_type cop_type; > > + struct vas_user_win_ops *vops; > > } coproc_device; > > > > struct coproc_instance { > > @@ -72,11 +78,10 @@ static int coproc_open(struct inode *inode, > > struct file *fp) > > static int coproc_ioc_tx_win_open(struct file *fp, unsigned long > > arg) > > { > > void __user *uptr = (void __user *)arg; > > - struct vas_tx_win_attr txattr = {}; > > struct vas_tx_win_open_attr uattr; > > struct coproc_instance *cp_inst; > > struct vas_window *txwin; > > - int rc, vasid; > > + int rc; > > > > cp_inst = fp->private_data; > > > > @@ -93,27 +98,20 @@ static int coproc_ioc_tx_win_open(struct file > > *fp, unsigned long arg) > > } > > > > if (uattr.version != 1) { > > - pr_err("Invalid version\n"); > > + pr_err("Invalid window open API version\n"); > > return -EINVAL; > > } > > > > - vasid = uattr.vas_id; > > - > > - vas_init_tx_win_attr(&txattr, cp_inst->coproc->cop_type); > > - > > - txattr.lpid = mfspr(SPRN_LPID); > > - txattr.pidr = mfspr(SPRN_PID); > > - txattr.user_win = true; > > - txattr.rsvd_txbuf_count = false; > > - txattr.pswid = false; > > - > > - pr_devel("Pid %d: Opening txwin, PIDR %ld\n", txattr.pidr, > > - mfspr(SPRN_PID)); > > + if (!cp_inst->coproc->vops && !cp_inst->coproc->vops->open_win) > > { > > + pr_err("VAS API is not registered\n"); > > + return -EACCES; > > + } > > > > - txwin = vas_tx_win_open(vasid, cp_inst->coproc->cop_type, > > &txattr); > > + txwin = cp_inst->coproc->vops->open_win(&uattr, > > + cp_inst->coproc->cop_type); > > if (IS_ERR(txwin)) { > > - pr_err("%s() vas_tx_win_open() failed, %ld\n", > > __func__, > > - PTR_ERR(txwin)); > > + pr_err("%s() VAS window open failed, %ld\n", __func__, > > + PTR_ERR(txwin)); > > return PTR_ERR(txwin); > > } > > > > @@ -125,9 +123,14 @@ static int coproc_ioc_tx_win_open(struct file > > *fp, unsigned long arg) > > static int coproc_release(struct inode *inode, struct file *fp) > > { > > struct coproc_instance *cp_inst = fp->private_data; > > + int rc = 0; > > > > if (cp_inst->txwin) { > > - vas_win_close(cp_inst->txwin); > > + if (cp_inst->coproc->vops && cp_inst->coproc->vops- > > >close_win) { > > + rc = cp_inst->coproc->vops->close_win(cp_inst- > > >txwin); > > + if (rc) > > + return rc; > > + } > > cp_inst->txwin = NULL; > > } > > > > @@ -168,7 +171,17 @@ static int coproc_mmap(struct file *fp, struct > > vm_area_struct *vma) > > return -EINVAL; > > } > > > > - vas_win_paste_addr(txwin, &paste_addr, NULL); > > + if (!cp_inst->coproc->vops && !cp_inst->coproc->vops- > > >paste_addr) { > > + pr_err("%s(): VAS API is not registered\n", __func__); > > + return -EACCES; > > + } > > + > > + paste_addr = cp_inst->coproc->vops->paste_addr(txwin); > > + if (!paste_addr) { > > + pr_err("%s(): Window paste address failed\n", > > __func__); > > + return -EINVAL; > > + } > > + > > pfn = paste_addr >> PAGE_SHIFT; > > > > /* flags, page_prot from cxl_mmap(), except we want cachable */ > > @@ -207,8 +220,8 @@ static struct file_operations coproc_fops = { > > * Supporting only nx-gzip coprocessor type now, but this API code > > * extended to other coprocessor types later. > > */ > > -int vas_register_api_powernv(struct module *mod, enum vas_cop_type > > cop_type, > > - const char *name) > > +int vas_register_coproc_api(struct module *mod, enum vas_cop_type > > cop_type, > > + const char *name, struct vas_user_win_ops > > *vops) > > { > > int rc = -EINVAL; > > dev_t devno; > > @@ -230,6 +243,7 @@ int vas_register_api_powernv(struct module > > *mod, enum vas_cop_type cop_type, > > } > > coproc_device.class->devnode = coproc_devnode; > > coproc_device.cop_type = cop_type; > > + coproc_device.vops = vops; > > > > coproc_fops.owner = mod; > > cdev_init(&coproc_device.cdev, &coproc_fops); > > @@ -262,9 +276,8 @@ int vas_register_api_powernv(struct module > > *mod, enum vas_cop_type cop_type, > > unregister_chrdev_region(coproc_device.devt, 1); > > return rc; > > } > > -EXPORT_SYMBOL_GPL(vas_register_api_powernv); > > > > -void vas_unregister_api_powernv(void) > > +void vas_unregister_coproc_api(void) > > { > > dev_t devno; > > > > @@ -275,4 +288,3 @@ void vas_unregister_api_powernv(void) > > class_destroy(coproc_device.class); > > unregister_chrdev_region(coproc_device.devt, 1); > > } > > -EXPORT_SYMBOL_GPL(vas_unregister_api_powernv); > > diff --git a/arch/powerpc/platforms/powernv/Kconfig > > b/arch/powerpc/platforms/powernv/Kconfig > > index 619b093a0657..043eefbbdd28 100644 > > --- a/arch/powerpc/platforms/powernv/Kconfig > > +++ b/arch/powerpc/platforms/powernv/Kconfig > > @@ -33,20 +33,6 @@ config PPC_MEMTRACE > > Enabling this option allows for runtime allocation of memory > > (RAM) > > for hardware tracing. > > > > -config PPC_VAS > > - bool "IBM Virtual Accelerator Switchboard (VAS)" > > - depends on PPC_POWERNV && PPC_64K_PAGES > > - default y > > - help > > - This enables support for IBM Virtual Accelerator Switchboard > > (VAS). > > - > > - VAS allows accelerators in co-processors like NX-GZIP and NX- > > 842 > > - to be accessible to kernel subsystems and user processes. > > - > > - VAS adapters are found in POWER9 based systems. > > - > > - If unsure, say N. > > - > > config SCOM_DEBUGFS > > bool "Expose SCOM controllers via debugfs" > > depends on DEBUG_FS > > diff --git a/arch/powerpc/platforms/powernv/Makefile > > b/arch/powerpc/platforms/powernv/Makefile > > index 2eb6ae150d1f..c747a1f1d25b 100644 > > --- a/arch/powerpc/platforms/powernv/Makefile > > +++ b/arch/powerpc/platforms/powernv/Makefile > > @@ -18,7 +18,7 @@ obj-$(CONFIG_MEMORY_FAILURE) += opal-memory- > > errors.o > > obj-$(CONFIG_OPAL_PRD) += opal-prd.o > > obj-$(CONFIG_PERF_EVENTS) += opal-imc.o > > obj-$(CONFIG_PPC_MEMTRACE) += memtrace.o > > -obj-$(CONFIG_PPC_VAS) += vas.o vas-window.o vas-debug.o vas- > > fault.o vas-api.o > > +obj-$(CONFIG_PPC_VAS) += vas.o vas-window.o vas-debug.o vas- > > fault.o > > obj-$(CONFIG_OCXL_BASE) += ocxl.o > > obj-$(CONFIG_SCOM_DEBUGFS) += opal-xscom.o > > obj-$(CONFIG_PPC_SECURE_BOOT) += opal-secvar.o > > diff --git a/arch/powerpc/platforms/powernv/vas-window.c > > b/arch/powerpc/platforms/powernv/vas-window.c > > index 5f5fe63a3d1c..b973dd574b47 100644 > > --- a/arch/powerpc/platforms/powernv/vas-window.c > > +++ b/arch/powerpc/platforms/powernv/vas-window.c > > @@ -16,6 +16,8 @@ > > #include <linux/mmu_context.h> > > #include <asm/switch_to.h> > > #include <asm/ppc-opcode.h> > > +#include <asm/vas.h> > > +#include <uapi/asm/vas-api.h> > > #include "vas.h" > > #include "copy-paste.h" > > > > @@ -1441,3 +1443,67 @@ struct vas_window > > *vas_pswid_to_window(struct vas_instance *vinst, > > > > return window; > > } > > + > > +static struct vas_window *vas_user_win_open(struct > > vas_tx_win_open_attr *uattr, > > + enum vas_cop_type cop_type) > > +{ > > + struct vas_tx_win_attr txattr = {}; > > + > > + vas_init_tx_win_attr(&txattr, cop_type); > > + > > + txattr.lpid = mfspr(SPRN_LPID); > > + txattr.pidr = mfspr(SPRN_PID); > > + txattr.user_win = true; > > + txattr.rsvd_txbuf_count = false; > > + txattr.pswid = false; > > + > > + pr_devel("Pid %d: Opening txwin, PIDR %ld\n", txattr.pidr, > > + mfspr(SPRN_PID)); > > + > > + return vas_tx_win_open(uattr->vas_id, cop_type, &txattr); > > +} > > + > > +static u64 vas_user_win_paste_addr(void *addr) > > +{ > > + u64 paste_addr; > > + > > + vas_win_paste_addr((struct vas_window *)addr, &paste_addr, > > NULL); > > + > > + return paste_addr; > > +} > > + > > +static int vas_user_win_close(void *addr) > > +{ > > + struct vas_window *txwin = addr; > > + > > + vas_win_close(txwin); > > + > > + return 0; > > +} > > + > > +static struct vas_user_win_ops vops = { > > + .open_win = vas_user_win_open, > > + .paste_addr = vas_user_win_paste_addr, > > + .close_win = vas_user_win_close, > > +}; > > + > > +/* > > + * Supporting only nx-gzip coprocessor type now, but this API code > > + * extended to other coprocessor types later. > > + */ > > +int vas_register_api_powernv(struct module *mod, enum vas_cop_type > > cop_type, > > + const char *name) > > +{ > > + int rc; > > + > > + rc = vas_register_coproc_api(mod, cop_type, name, &vops); > > + > > + return rc; > > +} > > +EXPORT_SYMBOL_GPL(vas_register_api_powernv); > > + > > +void vas_unregister_api_powernv(void) > > +{ > > + vas_unregister_coproc_api(); > > +} > > +EXPORT_SYMBOL_GPL(vas_unregister_api_powernv); > > -- > > 2.18.2 > > > > > >
Nicholas Piggin <npiggin@gmail.com> writes: > Excerpts from Haren Myneni's message of April 18, 2021 7:02 am: >> >> Using the same /dev/crypto/nx-gzip interface for both powerNV and >> pseries. > > The pseries NX driver will use the powernv VAS API ? > >> So this patch creates platforms/book3s/ and moves VAS API >> to that directory. The actual functionality is not changed. >> >> Common interface functions such as open, window open ioctl, mmap >> and close are moved to arch/powerpc/platforms/book3s/vas-api.c >> Added hooks to call platform specific code, but the underline >> powerNV code in these functions is not changed. > > Even so, could you do one patch that just moves, and another that > adds the ops struct? > >> >> Signed-off-by: Haren Myneni <haren@linux.ibm.com> >> --- >> arch/powerpc/include/asm/vas.h | 22 ++++++- >> arch/powerpc/platforms/Kconfig | 1 + >> arch/powerpc/platforms/Makefile | 1 + >> arch/powerpc/platforms/book3s/Kconfig | 15 +++++ >> arch/powerpc/platforms/book3s/Makefile | 2 + > > The usual place for these would be arch/powerpc/sysdev/vas. E.g., see > arch/powerpc/sysdev/xive. You're right that is the usual place, but is it a good place? :) Using platforms/book3s was my suggestion: https://lore.kernel.org/linuxppc-dev/87k0p6s5lo.fsf@mpe.ellerman.id.au/ But I don't feel that strongly about it, maybe just dumping things in sysdev is easier. cheers
diff --git a/arch/powerpc/include/asm/vas.h b/arch/powerpc/include/asm/vas.h index 41f73fae7ab8..6bbade60d8f4 100644 --- a/arch/powerpc/include/asm/vas.h +++ b/arch/powerpc/include/asm/vas.h @@ -5,6 +5,8 @@ #ifndef _ASM_POWERPC_VAS_H #define _ASM_POWERPC_VAS_H +#include <uapi/asm/vas-api.h> + struct vas_window; @@ -48,6 +50,16 @@ enum vas_cop_type { VAS_COP_TYPE_MAX, }; +/* + * User space window operations used for powernv and powerVM + */ +struct vas_user_win_ops { + struct vas_window * (*open_win)(struct vas_tx_win_open_attr *, + enum vas_cop_type); + u64 (*paste_addr)(void *); + int (*close_win)(void *); +}; + /* * Receive window attributes specified by the (in-kernel) owner of window. */ @@ -161,6 +173,9 @@ int vas_copy_crb(void *crb, int offset); * assumed to be true for NX windows. */ int vas_paste_crb(struct vas_window *win, int offset, bool re); +int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, + const char *name); +void vas_unregister_api_powernv(void); /* * Register / unregister coprocessor type to VAS API which will be exported @@ -170,8 +185,9 @@ int vas_paste_crb(struct vas_window *win, int offset, bool re); * Only NX GZIP coprocessor type is supported now, but this API can be * used for others in future. */ -int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, - const char *name); -void vas_unregister_api_powernv(void); +int vas_register_coproc_api(struct module *mod, enum vas_cop_type cop_type, + const char *name, + struct vas_user_win_ops *vops); +void vas_unregister_coproc_api(void); #endif /* __ASM_POWERPC_VAS_H */ diff --git a/arch/powerpc/platforms/Kconfig b/arch/powerpc/platforms/Kconfig index 7a5e8f4541e3..594544a65b02 100644 --- a/arch/powerpc/platforms/Kconfig +++ b/arch/powerpc/platforms/Kconfig @@ -20,6 +20,7 @@ source "arch/powerpc/platforms/embedded6xx/Kconfig" source "arch/powerpc/platforms/44x/Kconfig" source "arch/powerpc/platforms/40x/Kconfig" source "arch/powerpc/platforms/amigaone/Kconfig" +source "arch/powerpc/platforms/book3s/Kconfig" config KVM_GUEST bool "KVM Guest support" diff --git a/arch/powerpc/platforms/Makefile b/arch/powerpc/platforms/Makefile index 143d4417f6cc..0e75d7df387b 100644 --- a/arch/powerpc/platforms/Makefile +++ b/arch/powerpc/platforms/Makefile @@ -22,3 +22,4 @@ obj-$(CONFIG_PPC_CELL) += cell/ obj-$(CONFIG_PPC_PS3) += ps3/ obj-$(CONFIG_EMBEDDED6xx) += embedded6xx/ obj-$(CONFIG_AMIGAONE) += amigaone/ +obj-$(CONFIG_PPC_BOOK3S) += book3s/ diff --git a/arch/powerpc/platforms/book3s/Kconfig b/arch/powerpc/platforms/book3s/Kconfig new file mode 100644 index 000000000000..51e14db83a79 --- /dev/null +++ b/arch/powerpc/platforms/book3s/Kconfig @@ -0,0 +1,15 @@ +# SPDX-License-Identifier: GPL-2.0 +config PPC_VAS + bool "IBM Virtual Accelerator Switchboard (VAS)" + depends on PPC_POWERNV && PPC_64K_PAGES + default y + help + This enables support for IBM Virtual Accelerator Switchboard (VAS). + + VAS allows accelerators in co-processors like NX-GZIP and NX-842 + to be accessible to kernel subsystems and user processes. + VAS adapters are found in POWER9 and later based systems. + The user mode NX-GZIP support is added on P9 for powerNV and on + P10 for powerVM. + + If unsure, say "N". diff --git a/arch/powerpc/platforms/book3s/Makefile b/arch/powerpc/platforms/book3s/Makefile new file mode 100644 index 000000000000..e790f1910f61 --- /dev/null +++ b/arch/powerpc/platforms/book3s/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-$(CONFIG_PPC_VAS) += vas-api.o diff --git a/arch/powerpc/platforms/powernv/vas-api.c b/arch/powerpc/platforms/book3s/vas-api.c similarity index 83% rename from arch/powerpc/platforms/powernv/vas-api.c rename to arch/powerpc/platforms/book3s/vas-api.c index 72d8ce39e56c..05d7b99acf41 100644 --- a/arch/powerpc/platforms/powernv/vas-api.c +++ b/arch/powerpc/platforms/book3s/vas-api.c @@ -4,15 +4,20 @@ * Copyright (C) 2019 Haren Myneni, IBM Corp */ +#include <linux/module.h> #include <linux/kernel.h> #include <linux/device.h> #include <linux/cdev.h> #include <linux/fs.h> #include <linux/slab.h> #include <linux/uaccess.h> +#include <linux/kthread.h> +#include <linux/sched/signal.h> +#include <linux/sched/mm.h> +#include <linux/mmu_context.h> #include <asm/vas.h> +#include <asm/icswx.h> #include <uapi/asm/vas-api.h> -#include "vas.h" /* * The driver creates the device node that can be used as follows: @@ -42,6 +47,7 @@ static struct coproc_dev { dev_t devt; struct class *class; enum vas_cop_type cop_type; + struct vas_user_win_ops *vops; } coproc_device; struct coproc_instance { @@ -72,11 +78,10 @@ static int coproc_open(struct inode *inode, struct file *fp) static int coproc_ioc_tx_win_open(struct file *fp, unsigned long arg) { void __user *uptr = (void __user *)arg; - struct vas_tx_win_attr txattr = {}; struct vas_tx_win_open_attr uattr; struct coproc_instance *cp_inst; struct vas_window *txwin; - int rc, vasid; + int rc; cp_inst = fp->private_data; @@ -93,27 +98,20 @@ static int coproc_ioc_tx_win_open(struct file *fp, unsigned long arg) } if (uattr.version != 1) { - pr_err("Invalid version\n"); + pr_err("Invalid window open API version\n"); return -EINVAL; } - vasid = uattr.vas_id; - - vas_init_tx_win_attr(&txattr, cp_inst->coproc->cop_type); - - txattr.lpid = mfspr(SPRN_LPID); - txattr.pidr = mfspr(SPRN_PID); - txattr.user_win = true; - txattr.rsvd_txbuf_count = false; - txattr.pswid = false; - - pr_devel("Pid %d: Opening txwin, PIDR %ld\n", txattr.pidr, - mfspr(SPRN_PID)); + if (!cp_inst->coproc->vops && !cp_inst->coproc->vops->open_win) { + pr_err("VAS API is not registered\n"); + return -EACCES; + } - txwin = vas_tx_win_open(vasid, cp_inst->coproc->cop_type, &txattr); + txwin = cp_inst->coproc->vops->open_win(&uattr, + cp_inst->coproc->cop_type); if (IS_ERR(txwin)) { - pr_err("%s() vas_tx_win_open() failed, %ld\n", __func__, - PTR_ERR(txwin)); + pr_err("%s() VAS window open failed, %ld\n", __func__, + PTR_ERR(txwin)); return PTR_ERR(txwin); } @@ -125,9 +123,14 @@ static int coproc_ioc_tx_win_open(struct file *fp, unsigned long arg) static int coproc_release(struct inode *inode, struct file *fp) { struct coproc_instance *cp_inst = fp->private_data; + int rc = 0; if (cp_inst->txwin) { - vas_win_close(cp_inst->txwin); + if (cp_inst->coproc->vops && cp_inst->coproc->vops->close_win) { + rc = cp_inst->coproc->vops->close_win(cp_inst->txwin); + if (rc) + return rc; + } cp_inst->txwin = NULL; } @@ -168,7 +171,17 @@ static int coproc_mmap(struct file *fp, struct vm_area_struct *vma) return -EINVAL; } - vas_win_paste_addr(txwin, &paste_addr, NULL); + if (!cp_inst->coproc->vops && !cp_inst->coproc->vops->paste_addr) { + pr_err("%s(): VAS API is not registered\n", __func__); + return -EACCES; + } + + paste_addr = cp_inst->coproc->vops->paste_addr(txwin); + if (!paste_addr) { + pr_err("%s(): Window paste address failed\n", __func__); + return -EINVAL; + } + pfn = paste_addr >> PAGE_SHIFT; /* flags, page_prot from cxl_mmap(), except we want cachable */ @@ -207,8 +220,8 @@ static struct file_operations coproc_fops = { * Supporting only nx-gzip coprocessor type now, but this API code * extended to other coprocessor types later. */ -int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, - const char *name) +int vas_register_coproc_api(struct module *mod, enum vas_cop_type cop_type, + const char *name, struct vas_user_win_ops *vops) { int rc = -EINVAL; dev_t devno; @@ -230,6 +243,7 @@ int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, } coproc_device.class->devnode = coproc_devnode; coproc_device.cop_type = cop_type; + coproc_device.vops = vops; coproc_fops.owner = mod; cdev_init(&coproc_device.cdev, &coproc_fops); @@ -262,9 +276,8 @@ int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, unregister_chrdev_region(coproc_device.devt, 1); return rc; } -EXPORT_SYMBOL_GPL(vas_register_api_powernv); -void vas_unregister_api_powernv(void) +void vas_unregister_coproc_api(void) { dev_t devno; @@ -275,4 +288,3 @@ void vas_unregister_api_powernv(void) class_destroy(coproc_device.class); unregister_chrdev_region(coproc_device.devt, 1); } -EXPORT_SYMBOL_GPL(vas_unregister_api_powernv); diff --git a/arch/powerpc/platforms/powernv/Kconfig b/arch/powerpc/platforms/powernv/Kconfig index 619b093a0657..043eefbbdd28 100644 --- a/arch/powerpc/platforms/powernv/Kconfig +++ b/arch/powerpc/platforms/powernv/Kconfig @@ -33,20 +33,6 @@ config PPC_MEMTRACE Enabling this option allows for runtime allocation of memory (RAM) for hardware tracing. -config PPC_VAS - bool "IBM Virtual Accelerator Switchboard (VAS)" - depends on PPC_POWERNV && PPC_64K_PAGES - default y - help - This enables support for IBM Virtual Accelerator Switchboard (VAS). - - VAS allows accelerators in co-processors like NX-GZIP and NX-842 - to be accessible to kernel subsystems and user processes. - - VAS adapters are found in POWER9 based systems. - - If unsure, say N. - config SCOM_DEBUGFS bool "Expose SCOM controllers via debugfs" depends on DEBUG_FS diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile index 2eb6ae150d1f..c747a1f1d25b 100644 --- a/arch/powerpc/platforms/powernv/Makefile +++ b/arch/powerpc/platforms/powernv/Makefile @@ -18,7 +18,7 @@ obj-$(CONFIG_MEMORY_FAILURE) += opal-memory-errors.o obj-$(CONFIG_OPAL_PRD) += opal-prd.o obj-$(CONFIG_PERF_EVENTS) += opal-imc.o obj-$(CONFIG_PPC_MEMTRACE) += memtrace.o -obj-$(CONFIG_PPC_VAS) += vas.o vas-window.o vas-debug.o vas-fault.o vas-api.o +obj-$(CONFIG_PPC_VAS) += vas.o vas-window.o vas-debug.o vas-fault.o obj-$(CONFIG_OCXL_BASE) += ocxl.o obj-$(CONFIG_SCOM_DEBUGFS) += opal-xscom.o obj-$(CONFIG_PPC_SECURE_BOOT) += opal-secvar.o diff --git a/arch/powerpc/platforms/powernv/vas-window.c b/arch/powerpc/platforms/powernv/vas-window.c index 5f5fe63a3d1c..b973dd574b47 100644 --- a/arch/powerpc/platforms/powernv/vas-window.c +++ b/arch/powerpc/platforms/powernv/vas-window.c @@ -16,6 +16,8 @@ #include <linux/mmu_context.h> #include <asm/switch_to.h> #include <asm/ppc-opcode.h> +#include <asm/vas.h> +#include <uapi/asm/vas-api.h> #include "vas.h" #include "copy-paste.h" @@ -1441,3 +1443,67 @@ struct vas_window *vas_pswid_to_window(struct vas_instance *vinst, return window; } + +static struct vas_window *vas_user_win_open(struct vas_tx_win_open_attr *uattr, + enum vas_cop_type cop_type) +{ + struct vas_tx_win_attr txattr = {}; + + vas_init_tx_win_attr(&txattr, cop_type); + + txattr.lpid = mfspr(SPRN_LPID); + txattr.pidr = mfspr(SPRN_PID); + txattr.user_win = true; + txattr.rsvd_txbuf_count = false; + txattr.pswid = false; + + pr_devel("Pid %d: Opening txwin, PIDR %ld\n", txattr.pidr, + mfspr(SPRN_PID)); + + return vas_tx_win_open(uattr->vas_id, cop_type, &txattr); +} + +static u64 vas_user_win_paste_addr(void *addr) +{ + u64 paste_addr; + + vas_win_paste_addr((struct vas_window *)addr, &paste_addr, NULL); + + return paste_addr; +} + +static int vas_user_win_close(void *addr) +{ + struct vas_window *txwin = addr; + + vas_win_close(txwin); + + return 0; +} + +static struct vas_user_win_ops vops = { + .open_win = vas_user_win_open, + .paste_addr = vas_user_win_paste_addr, + .close_win = vas_user_win_close, +}; + +/* + * Supporting only nx-gzip coprocessor type now, but this API code + * extended to other coprocessor types later. + */ +int vas_register_api_powernv(struct module *mod, enum vas_cop_type cop_type, + const char *name) +{ + int rc; + + rc = vas_register_coproc_api(mod, cop_type, name, &vops); + + return rc; +} +EXPORT_SYMBOL_GPL(vas_register_api_powernv); + +void vas_unregister_api_powernv(void) +{ + vas_unregister_coproc_api(); +} +EXPORT_SYMBOL_GPL(vas_unregister_api_powernv);
Using the same /dev/crypto/nx-gzip interface for both powerNV and pseries. So this patch creates platforms/book3s/ and moves VAS API to that directory. The actual functionality is not changed. Common interface functions such as open, window open ioctl, mmap and close are moved to arch/powerpc/platforms/book3s/vas-api.c Added hooks to call platform specific code, but the underline powerNV code in these functions is not changed. Signed-off-by: Haren Myneni <haren@linux.ibm.com> --- arch/powerpc/include/asm/vas.h | 22 ++++++- arch/powerpc/platforms/Kconfig | 1 + arch/powerpc/platforms/Makefile | 1 + arch/powerpc/platforms/book3s/Kconfig | 15 +++++ arch/powerpc/platforms/book3s/Makefile | 2 + .../platforms/{powernv => book3s}/vas-api.c | 64 ++++++++++-------- arch/powerpc/platforms/powernv/Kconfig | 14 ---- arch/powerpc/platforms/powernv/Makefile | 2 +- arch/powerpc/platforms/powernv/vas-window.c | 66 +++++++++++++++++++ 9 files changed, 143 insertions(+), 44 deletions(-) create mode 100644 arch/powerpc/platforms/book3s/Kconfig create mode 100644 arch/powerpc/platforms/book3s/Makefile rename arch/powerpc/platforms/{powernv => book3s}/vas-api.c (83%)