Re: [Qemu-devel] [PATCH v2 04/14] spapr_pci: add set-indicator RTAS interface

[Alexey Kardashevskiy <aik@ozlabs.ru>]

On 12/06/2013 09:32 AM, Michael Roth wrote:
> From: Mike Day <ncmike@ncultra.org>
> 
> Signed-off-by: Mike Day <ncmike@ncultra.org>
> Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
> ---
>  hw/ppc/spapr_pci.c     |   93 ++++++++++++++++++++++++++++++++++++++++++++++++
>  include/hw/ppc/spapr.h |   28 +++++++++++++++
>  2 files changed, 121 insertions(+)
> 
> diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
> index 7568a03..1046ec8 100644
> --- a/hw/ppc/spapr_pci.c
> +++ b/hw/ppc/spapr_pci.c
> @@ -35,6 +35,16 @@
>  
>  #include "hw/pci/pci_bus.h"
>  
> +/* #define DEBUG_SPAPR */
> +
> +#ifdef DEBUG_SPAPR
> +#define DPRINTF(fmt, ...) \
> +    do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
> +#else
> +#define DPRINTF(fmt, ...) \
> +    do { } while (0)
> +#endif
> +
>  /* Copied from the kernel arch/powerpc/platforms/pseries/msi.c */
>  #define RTAS_QUERY_FN           0
>  #define RTAS_CHANGE_FN          1
> @@ -404,6 +414,80 @@ static void rtas_ibm_query_interrupt_source_number(PowerPCCPU *cpu,
>      rtas_st(rets, 2, 1);/* 0 == level; 1 == edge */
>  }
>  
> +static void rtas_set_indicator(PowerPCCPU *cpu, sPAPREnvironment *spapr,
> +                               uint32_t token, uint32_t nargs,
> +                               target_ulong args, uint32_t nret,
> +                               target_ulong rets)
> +{
> +    uint32_t indicator = rtas_ld(args, 0);
> +    uint32_t drc_index = rtas_ld(args, 1);
> +    uint32_t indicator_state = rtas_ld(args, 2);
> +    uint32_t encoded = 0, shift = 0, mask = 0;
> +    uint32_t *pind;
> +    DrcEntry *drc_entry = NULL;
> +
> +    if (drc_index == 0) { /* platform indicator */
> +        pind = &spapr->state;
> +    } else {
> +        drc_entry = spapr_find_drc_entry(drc_index);
> +        if (!drc_entry) {
> +            DPRINTF("rtas_set_indicator: unable to find drc_entry for %x",
> +                    drc_index);
> +            rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
> +            return;
> +        }
> +        pind = &drc_entry->state;
> +    }
> +
> +    switch (indicator) {
> +    case 9:  /* EPOW */
> +        shift = INDICATOR_EPOW_SHIFT;
> +        mask = INDICATOR_EPOW_MASK;
> +        break;
> +    case 9001: /* Isolation state */
> +        /* encode the new value into the correct bit field */
> +        shift = INDICATOR_ISOLATION_SHIFT;
> +        mask = INDICATOR_ISOLATION_MASK;
> +        break;
> +    case 9002: /* DR */
> +        shift = INDICATOR_DR_SHIFT;
> +        mask = INDICATOR_DR_MASK;
> +        break;
> +    case 9003: /* Allocation State */
> +        shift = INDICATOR_ALLOCATION_SHIFT;
> +        mask = INDICATOR_ALLOCATION_MASK;
> +        break;
> +    case 9005: /* global interrupt */
> +        shift = INDICATOR_GLOBAL_INTERRUPT_SHIFT;
> +        mask = INDICATOR_GLOBAL_INTERRUPT_MASK;
> +        break;
> +    case 9006: /* error log */
> +        shift = INDICATOR_ERROR_LOG_SHIFT;
> +        mask = INDICATOR_ERROR_LOG_MASK;
> +        break;
> +    case 9007: /* identify */
> +        shift = INDICATOR_IDENTIFY_SHIFT;
> +        mask = INDICATOR_IDENTIFY_MASK;
> +        break;
> +    case 9009: /* reset */
> +        shift = INDICATOR_RESET_SHIFT;
> +        mask = INDICATOR_RESET_MASK;
> +        break;
> +    default:
> +        DPRINTF("rtas_set_indicator: indicator not implemented: %d",
> +                indicator);
> +        rtas_st(rets, 0, RTAS_OUT_PARAM_ERROR);
> +        return;
> +    }
> +
> +    encoded = ENCODE_DRC_STATE(indicator_state, mask, shift);
> +    /* clear the current indicator value */
> +    *pind &= ~mask;
> +    /* set the new value */
> +    *pind |= encoded;
> +    rtas_st(rets, 0, RTAS_OUT_SUCCESS);
> +}
> +
>  static int pci_spapr_swizzle(int slot, int pin)
>  {
>      return (slot + pin) % PCI_NUM_PINS;
> @@ -637,6 +721,14 @@ static int spapr_phb_init(SysBusDevice *s)
>          sphb->lsi_table[i].irq = irq;
>      }
>  
> +    /* make sure the platform EPOW sensor is initialized - the
> +     * guest will probe it when there is a hotplug event.
> +     */
> +    spapr->state &= ~(uint32_t)INDICATOR_EPOW_MASK;
> +    spapr->state |= ENCODE_DRC_STATE(0,
> +                                     INDICATOR_EPOW_MASK,
> +                                     INDICATOR_EPOW_SHIFT);
> +
>      return 0;
>  }
>  
> @@ -958,6 +1050,7 @@ void spapr_pci_rtas_init(void)
>                              rtas_ibm_query_interrupt_source_number);
>          spapr_rtas_register("ibm,change-msi", rtas_ibm_change_msi);
>      }
> +    spapr_rtas_register("set-indicator", rtas_set_indicator);
>  }
>  
>  static void spapr_pci_register_types(void)
> diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
> index 6ae5c54..b48c55f 100644
> --- a/include/hw/ppc/spapr.h
> +++ b/include/hw/ppc/spapr.h
> @@ -38,6 +38,9 @@ typedef struct sPAPREnvironment {
>      int htab_save_index;
>      bool htab_first_pass;
>      int htab_fd;
> +
> +    /* platform state - sensors and indicators */
> +    uint32_t state;
>  } sPAPREnvironment;
>  
>  #define H_SUCCESS         0
> @@ -334,6 +337,31 @@ DrcEntry *spapr_add_phb_to_drc_table(uint64_t buid, uint32_t state);
>  DrcEntry *spapr_phb_to_drc_entry(uint64_t buid);
>  DrcEntry *spapr_find_drc_entry(int drc_index);
>  
> +/* For set-indicator RTAS interface */
> +#define INDICATOR_ISOLATION_MASK            0x0001   /* 9001 one bit */
> +#define INDICATOR_GLOBAL_INTERRUPT_MASK     0x0002   /* 9005 one bit */
> +#define INDICATOR_ERROR_LOG_MASK            0x0004   /* 9006 one bit */
> +#define INDICATOR_IDENTIFY_MASK             0x0008   /* 9007 one bit */
> +#define INDICATOR_RESET_MASK                0x0010   /* 9009 one bit */
> +#define INDICATOR_DR_MASK                   0x00e0   /* 9002 three bits */
> +#define INDICATOR_ALLOCATION_MASK           0x0300   /* 9003 two bits */
> +#define INDICATOR_EPOW_MASK                 0x1c00   /* 9 three bits */
> +
> +#define INDICATOR_ISOLATION_SHIFT           0x00     /* bit 0 */
> +#define INDICATOR_GLOBAL_INTERRUPT_SHIFT    0x01     /* bit 1 */
> +#define INDICATOR_ERROR_LOG_SHIFT           0x02     /* bit 2 */
> +#define INDICATOR_IDENTIFY_SHIFT            0x03     /* bit 3 */
> +#define INDICATOR_RESET_SHIFT               0x04     /* bit 4 */
> +#define INDICATOR_DR_SHIFT                  0x05     /* bits 5-7 */
> +#define INDICATOR_ALLOCATION_SHIFT          0x08     /* bits 8-9 */
> +#define INDICATOR_EPOW_SHIFT                0x0a     /* bits 10-12 */
> +
> +#define DECODE_DRC_STATE(state, m, s)                  \
> +    ((((uint32_t)(state) & (uint32_t)(m))) >> (s))
> +
> +#define ENCODE_DRC_STATE(val, m, s) \
> +    (((uint32_t)(val) << (s)) & (uint32_t)(m))
> +


Why to put these definitions in the header when they are only used by the
spapr_pci.c? It gives me the (wrong) idea that these are shared between
files...



>  extern sPAPREnvironment *spapr;
>  
>  /*#define DEBUG_SPAPR_HCALLS*/
> 


-- 
Alexey