[3/4,V3] Header with various utility functions shared

Signed-off-by: Deep Debroy <ddebroy@gmail.com>
---
 hw/vmware_utils.h |  126 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 126 insertions(+)
 create mode 100644 hw/vmware_utils.h

On Sat, Jul 7, 2012 at 5:05 AM, Deep Debroy <ddebroy@gmail.com> wrote:
> Signed-off-by: Deep Debroy <ddebroy@gmail.com>
> ---
>  hw/vmware_utils.h |  126 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 126 insertions(+)
>  create mode 100644 hw/vmware_utils.h
>
> diff --git a/hw/vmware_utils.h b/hw/vmware_utils.h
> new file mode 100644
> index 0000000..73b039e
> --- /dev/null
> +++ b/hw/vmware_utils.h
> @@ -0,0 +1,126 @@
> +/*
> + * QEMU VMWARE paravirtual devices - auxiliary code
> + *
> + * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
> + *
> + * Developed by Daynix Computing LTD (http://www.daynix.com)
> + *
> + * Authors:
> + * Dmitry Fleytman <dmitry@daynix.com>
> + * Yan Vugenfirer <yvugenfi@redhat.com>
> + *
> + * This work is licensed under the terms of the GNU GPL, version 2 or later.
> + * See the COPYING file in the top-level directory.
> + *
> + */
> +
> +#ifndef VMWARE_UTILS_H
> +#define VMWARE_UTILS_H
> +
> +#ifndef DSHPRINTF
> +#define DSHPRINTF(fmt, ...) do {} while (0)
> +#endif
> +
> +/* Shared memory access functions with byte swap support */
> +static inline void
> +vmw_shmem_read(target_phys_addr_t addr, void *buf, int len)
> +{
> +    DSHPRINTF("SHMEM r: %" PRIx64 ", len: %d to %p", addr, len, buf);

PRIx64 is not correct, please use TARGET_FMT_plx. Tracepoints are also
superior to debug printfs.

> +    cpu_physical_memory_read(addr, buf, len);
> +}

These don't seem useful. I think DMA accessors should also be used.

> +
> +static inline void
> +vmw_shmem_write(target_phys_addr_t addr, void *buf, int len)
> +{
> +    DSHPRINTF("SHMEM w: %" PRIx64 ", len: %d to %p", addr, len, buf);
> +    cpu_physical_memory_write(addr, buf, len);
> +}
> +
> +static inline void
> +vmw_shmem_rw(target_phys_addr_t addr, void *buf, int len, int is_write)
> +{
> +    DSHPRINTF("SHMEM r/w: %" PRIx64 ", len: %d (to %p), is write: %d",
> +              addr, len, buf, is_write);
> +
> +    cpu_physical_memory_rw(addr, buf, len, is_write);
> +}
> +
> +static inline void
> +vmw_shmem_set(target_phys_addr_t addr, uint8 val, int len)
> +{
> +    int i;
> +    DSHPRINTF("SHMEM set: %" PRIx64 ", len: %d (value 0x%X)", addr, len, val);
> +
> +    for (i = 0; i < len; i++) {
> +        cpu_physical_memory_write(addr + i, &val, 1);
> +    }
> +}
> +
> +static inline uint32_t
> +vmw_shmem_ld8(target_phys_addr_t addr)
> +{
> +    uint8_t res = ldub_phys(addr);
> +    DSHPRINTF("SHMEM load8: %" PRIx64 " (value 0x%X)", addr, res);
> +    return res;
> +}
> +
> +static inline void
> +vmw_shmem_st8(target_phys_addr_t addr, uint8_t value)
> +{
> +    DSHPRINTF("SHMEM store8: %" PRIx64 " (value 0x%X)", addr, value);
> +    stb_phys(addr, value);
> +}
> +
> +static inline uint32_t
> +vmw_shmem_ld16(target_phys_addr_t addr)
> +{
> +    uint16_t res = lduw_le_phys(addr);
> +    DSHPRINTF("SHMEM load16: %" PRIx64 " (value 0x%X)", addr, res);
> +    return res;
> +}
> +
> +static inline void
> +vmw_shmem_st16(target_phys_addr_t addr, uint16_t value)
> +{
> +    DSHPRINTF("SHMEM store16: %" PRIx64 " (value 0x%X)", addr, value);
> +    stw_le_phys(addr, value);
> +}
> +
> +static inline uint32_t
> +vmw_shmem_ld32(target_phys_addr_t addr)
> +{
> +    uint32_t res = ldl_le_phys(addr);
> +    DSHPRINTF("SHMEM load32: %" PRIx64 " (value 0x%X)", addr, res);
> +    return res;
> +}
> +
> +static inline void
> +vmw_shmem_st32(target_phys_addr_t addr, uint32_t value)
> +{
> +    DSHPRINTF("SHMEM store32: %" PRIx64 " (value 0x%X)", addr, value);
> +    stl_le_phys(addr, value);
> +}
> +
> +static inline uint64_t
> +vmw_shmem_ld64(target_phys_addr_t addr)
> +{
> +    uint64_t res = ldq_le_phys(addr);
> +    DSHPRINTF("SHMEM load64: %" PRIx64 " (value %" PRIx64 ")", addr, res);
> +    return res;
> +}
> +
> +static inline void
> +vmw_shmem_st64(target_phys_addr_t addr, uint64_t value)
> +{
> +    DSHPRINTF("SHMEM store64: %" PRIx64 " (value %" PRIx64 ")", addr, value);
> +    stq_le_phys(addr, value);
> +}
> +
> +/* MACROS for simplification of operations on array-style registers */
> +#define IS_MULTIREG_ADDR(addr, base, cnt, regsize)                 \
> +    (((addr) >= (base)) && ((addr) < (base) + (cnt) * (regsize)))
> +
> +#define MULTIREG_IDX_BY_ADDR(addr, base, regsize)                  \
> +    (((addr) - (base)) / (regsize))
> +
> +#endif
> --
> 1.7.9.5
>

Il 07/07/2012 09:56, Blue Swirl ha scritto:
> These don't seem useful. I think DMA accessors should also be used.

This is a paravirtualized device model, so I think no (like virtio).

I agree that this patch can be dropped and the functions inlined
manually in pvscsi.c (patch 4).

Paolo

On Sun, Jul 8, 2012 at 11:57 PM, Paolo Bonzini <pbonzini@redhat.com> wrote:
> Il 07/07/2012 09:56, Blue Swirl ha scritto:
>> These don't seem useful. I think DMA accessors should also be used.
>
> This is a paravirtualized device model, so I think no (like virtio).
>
> I agree that this patch can be dropped and the functions inlined
> manually in pvscsi.c (patch 4).

Sounds good. Will inline these into pvscsi.c and re-submit in the next version.
>
> Paolo
>