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Re: [PATCH 1/5] ppc/pnv: Add a PNOR model
From: |
David Gibson |
Subject: |
Re: [PATCH 1/5] ppc/pnv: Add a PNOR model |
Date: |
Sun, 27 Oct 2019 18:46:31 +0100 |
User-agent: |
Mutt/1.12.1 (2019-06-15) |
On Mon, Oct 21, 2019 at 03:12:11PM +0200, Cédric Le Goater wrote:
> From: Cédric Le Goater <address@hidden>
>
> On a POWERPC PowerNV system, the host firmware is stored in a PNOR
> flash chip which contents is mapped on the LPC bus. This model adds a
> simple dummy device to map the contents of a block device in the host
> address space.
>
> Signed-off-by: Cédric Le Goater <address@hidden>
Applied to ppc-for-4.2. The rest of the series will need acks for the
generic IPMI changes, of course.
> ---
> include/hw/ppc/pnv.h | 3 +
> include/hw/ppc/pnv_pnor.h | 25 +++++++
> hw/ppc/pnv.c | 14 ++++
> hw/ppc/pnv_pnor.c | 135 ++++++++++++++++++++++++++++++++++++++
> hw/ppc/Makefile.objs | 4 +-
> 5 files changed, 180 insertions(+), 1 deletion(-)
> create mode 100644 include/hw/ppc/pnv_pnor.h
> create mode 100644 hw/ppc/pnv_pnor.c
>
> diff --git a/include/hw/ppc/pnv.h b/include/hw/ppc/pnv.h
> index 5e01a9f3df95..e2f20f2b0bc4 100644
> --- a/include/hw/ppc/pnv.h
> +++ b/include/hw/ppc/pnv.h
> @@ -24,6 +24,7 @@
> #include "hw/sysbus.h"
> #include "hw/ipmi/ipmi.h"
> #include "hw/ppc/pnv_lpc.h"
> +#include "hw/ppc/pnv_pnor.h"
> #include "hw/ppc/pnv_psi.h"
> #include "hw/ppc/pnv_occ.h"
> #include "hw/ppc/pnv_homer.h"
> @@ -173,6 +174,8 @@ typedef struct PnvMachineState {
>
> IPMIBmc *bmc;
> Notifier powerdown_notifier;
> +
> + PnvPnor *pnor;
> } PnvMachineState;
>
> static inline bool pnv_chip_is_power9(const PnvChip *chip)
> diff --git a/include/hw/ppc/pnv_pnor.h b/include/hw/ppc/pnv_pnor.h
> new file mode 100644
> index 000000000000..dec811695c8d
> --- /dev/null
> +++ b/include/hw/ppc/pnv_pnor.h
> @@ -0,0 +1,25 @@
> +/*
> + * QEMU PowerNV PNOR simple model
> + *
> + * Copyright (c) 2019, IBM Corporation.
> + *
> + * This code is licensed under the GPL version 2 or later. See the
> + * COPYING file in the top-level directory.
> + */
> +#ifndef _PPC_PNV_PNOR_H
> +#define _PPC_PNV_PNOR_H
> +
> +#define TYPE_PNV_PNOR "pnv-pnor"
> +#define PNV_PNOR(obj) OBJECT_CHECK(PnvPnor, (obj), TYPE_PNV_PNOR)
> +
> +typedef struct PnvPnor {
> + SysBusDevice parent_obj;
> +
> + BlockBackend *blk;
> +
> + uint8_t *storage;
> + uint32_t size;
> + MemoryRegion mmio;
> +} PnvPnor;
> +
> +#endif /* _PPC_PNV_PNOR_H */
> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> index 1a22dfd46031..b74528eba42a 100644
> --- a/hw/ppc/pnv.c
> +++ b/hw/ppc/pnv.c
> @@ -44,6 +44,7 @@
> #include "hw/ppc/xics.h"
> #include "hw/qdev-properties.h"
> #include "hw/ppc/pnv_xscom.h"
> +#include "hw/ppc/pnv_pnor.h"
>
> #include "hw/isa/isa.h"
> #include "hw/boards.h"
> @@ -633,6 +634,8 @@ static void pnv_init(MachineState *machine)
> long fw_size;
> int i;
> char *chip_typename;
> + DriveInfo *pnor = drive_get(IF_MTD, 0, 0);
> + DeviceState *dev;
>
> /* allocate RAM */
> if (machine->ram_size < (1 * GiB)) {
> @@ -644,6 +647,17 @@ static void pnv_init(MachineState *machine)
> machine->ram_size);
> memory_region_add_subregion(get_system_memory(), 0, ram);
>
> + /*
> + * Create our simple PNOR device
> + */
> + dev = qdev_create(NULL, TYPE_PNV_PNOR);
> + if (pnor) {
> + qdev_prop_set_drive(dev, "drive", blk_by_legacy_dinfo(pnor),
> + &error_abort);
> + }
> + qdev_init_nofail(dev);
> + pnv->pnor = PNV_PNOR(dev);
> +
> /* load skiboot firmware */
> if (bios_name == NULL) {
> bios_name = FW_FILE_NAME;
> diff --git a/hw/ppc/pnv_pnor.c b/hw/ppc/pnv_pnor.c
> new file mode 100644
> index 000000000000..bfb1e92b0392
> --- /dev/null
> +++ b/hw/ppc/pnv_pnor.c
> @@ -0,0 +1,135 @@
> +/*
> + * QEMU PowerNV PNOR simple model
> + *
> + * Copyright (c) 2015-2019, IBM Corporation.
> + *
> + * This code is licensed under the GPL version 2 or later. See the
> + * COPYING file in the top-level directory.
> + */
> +
> +#include "qemu/osdep.h"
> +#include "qapi/error.h"
> +#include "qemu/error-report.h"
> +#include "qemu/log.h"
> +#include "sysemu/block-backend.h"
> +#include "sysemu/blockdev.h"
> +#include "hw/loader.h"
> +#include "hw/ppc/pnv_pnor.h"
> +#include "hw/qdev-properties.h"
> +
> +static uint64_t pnv_pnor_read(void *opaque, hwaddr addr, unsigned size)
> +{
> + PnvPnor *s = PNV_PNOR(opaque);
> + uint64_t ret = 0;
> + int i;
> +
> + for (i = 0; i < size; i++) {
> + ret |= (uint64_t) s->storage[addr + i] << (8 * (size - i - 1));
> + }
> +
> + return ret;
> +}
> +
> +static void pnv_pnor_update(PnvPnor *s, int offset, int size)
> +{
> + int offset_end;
> +
> + if (s->blk) {
> + return;
> + }
> +
> + offset_end = offset + size;
> + offset = QEMU_ALIGN_DOWN(offset, BDRV_SECTOR_SIZE);
> + offset_end = QEMU_ALIGN_UP(offset_end, BDRV_SECTOR_SIZE);
> +
> + blk_pwrite(s->blk, offset, s->storage + offset,
> + offset_end - offset, 0);
> +}
> +
> +static void pnv_pnor_write(void *opaque, hwaddr addr, uint64_t data,
> + unsigned size)
> +{
> + PnvPnor *s = PNV_PNOR(opaque);
> + int i;
> +
> + for (i = 0; i < size; i++) {
> + s->storage[addr + i] = (data >> (8 * (size - i - 1))) & 0xFF;
> + }
> + pnv_pnor_update(s, addr, size);
> +}
> +
> +/*
> + * TODO: Check endianness: skiboot is BIG, Aspeed AHB is LITTLE, flash
> + * is BIG.
> + */
> +static const MemoryRegionOps pnv_pnor_ops = {
> + .read = pnv_pnor_read,
> + .write = pnv_pnor_write,
> + .endianness = DEVICE_BIG_ENDIAN,
> + .valid = {
> + .min_access_size = 1,
> + .max_access_size = 4,
> + },
> +};
> +
> +static void pnv_pnor_realize(DeviceState *dev, Error **errp)
> +{
> + PnvPnor *s = PNV_PNOR(dev);
> + int ret;
> +
> + if (s->blk) {
> + uint64_t perm = BLK_PERM_CONSISTENT_READ |
> + (blk_is_read_only(s->blk) ? 0 : BLK_PERM_WRITE);
> + ret = blk_set_perm(s->blk, perm, BLK_PERM_ALL, errp);
> + if (ret < 0) {
> + return;
> + }
> +
> + s->size = blk_getlength(s->blk);
> + if (s->size <= 0) {
> + error_setg(errp, "failed to get flash size");
> + return;
> + }
> +
> + s->storage = blk_blockalign(s->blk, s->size);
> +
> + if (blk_pread(s->blk, 0, s->storage, s->size) != s->size) {
> + error_setg(errp, "failed to read the initial flash content");
> + return;
> + }
> + } else {
> + s->storage = blk_blockalign(NULL, s->size);
> + memset(s->storage, 0xFF, s->size);
> + }
> +
> + memory_region_init_io(&s->mmio, OBJECT(s), &pnv_pnor_ops, s,
> + TYPE_PNV_PNOR, s->size);
> +}
> +
> +static Property pnv_pnor_properties[] = {
> + DEFINE_PROP_UINT32("size", PnvPnor, size, 128 << 20),
> + DEFINE_PROP_DRIVE("drive", PnvPnor, blk),
> + DEFINE_PROP_END_OF_LIST(),
> +};
> +
> +static void pnv_pnor_class_init(ObjectClass *klass, void *data)
> +{
> + DeviceClass *dc = DEVICE_CLASS(klass);
> +
> + dc->realize = pnv_pnor_realize;
> + dc->props = pnv_pnor_properties;
> +}
> +
> +static const TypeInfo pnv_pnor_info = {
> + .name = TYPE_PNV_PNOR,
> + .parent = TYPE_SYS_BUS_DEVICE,
> + .instance_size = sizeof(PnvPnor),
> + .class_init = pnv_pnor_class_init,
> +};
> +
> +static void pnv_pnor_register_types(void)
> +{
> + type_register_static(&pnv_pnor_info);
> +}
> +
> +type_init(pnv_pnor_register_types)
> diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs
> index 580bb4f0dd4c..101e9fc59185 100644
> --- a/hw/ppc/Makefile.objs
> +++ b/hw/ppc/Makefile.objs
> @@ -9,7 +9,9 @@ obj-$(CONFIG_PSERIES) += spapr_tpm_proxy.o
> obj-$(CONFIG_SPAPR_RNG) += spapr_rng.o
> # IBM PowerNV
> obj-$(CONFIG_POWERNV) += pnv.o pnv_xscom.o pnv_core.o pnv_lpc.o pnv_psi.o
> pnv_occ.o pnv_bmc.o
> -obj-$(CONFIG_POWERNV) += pnv_homer.o
> +obj-$(CONFIG_POWERNV) += pnv_homer.o pnv_pnor.o
> +
> +
> ifeq ($(CONFIG_PCI)$(CONFIG_PSERIES)$(CONFIG_LINUX), yyy)
> obj-y += spapr_pci_vfio.o spapr_pci_nvlink2.o
> endif
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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