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Re: [PATCH] sungem: Add WOL MMIO
From: |
Joel Stanley |
Subject: |
Re: [PATCH] sungem: Add WOL MMIO |
Date: |
Mon, 26 Jun 2023 13:13:30 +0000 |
On Sun, 25 Jun 2023 at 20:17, Nicholas Piggin <npiggin@gmail.com> wrote:
>
> Apple sungem devices are expected to have WOL MMIO registers.
> Add a region to prevent transaction failures, and implement the
> WOL-disable CSR write because the Linux driver reset writes
> this.
>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
> ---
> This fixes the failed MMIO error in the Linux sungem driver reset
> when it clears the WOL CSR.
>
> Thanks,
> Nick
>
> hw/net/sungem.c | 52 +++++++++++++++++++++++++++++++++++++++++++++
> hw/net/trace-events | 2 ++
> 2 files changed, 54 insertions(+)
>
> diff --git a/hw/net/sungem.c b/hw/net/sungem.c
> index eb01520790..e0e8e5ae41 100644
> --- a/hw/net/sungem.c
> +++ b/hw/net/sungem.c
> @@ -107,6 +107,15 @@ OBJECT_DECLARE_SIMPLE_TYPE(SunGEMState, SUNGEM)
> #define RXDMA_FTAG 0x0110UL /* RX FIFO Tag */
> #define RXDMA_FSZ 0x0120UL /* RX FIFO Size */
>
> +/* WOL Registers */
> +#define SUNGEM_MMIO_WOL_SIZE 0x14
> +
> +#define WOL_MATCH0 0x0000UL
> +#define WOL_MATCH1 0x0004UL
> +#define WOL_MATCH2 0x0008UL
> +#define WOL_MCOUNT 0x000CUL
> +#define WOL_WAKECSR 0x0010UL
> +
> /* MAC Registers */
> #define SUNGEM_MMIO_MAC_SIZE 0x200
>
> @@ -168,6 +177,7 @@ OBJECT_DECLARE_SIMPLE_TYPE(SunGEMState, SUNGEM)
> #define SUNGEM_MMIO_PCS_SIZE 0x60
> #define PCS_MIISTAT 0x0004UL /* PCS MII Status Register */
> #define PCS_ISTAT 0x0018UL /* PCS Interrupt Status Reg */
> +
> #define PCS_SSTATE 0x005CUL /* Serialink State Register */
>
> /* Descriptors */
> @@ -200,6 +210,7 @@ struct SunGEMState {
> MemoryRegion greg;
> MemoryRegion txdma;
> MemoryRegion rxdma;
> + MemoryRegion wol;
> MemoryRegion mac;
> MemoryRegion mif;
> MemoryRegion pcs;
> @@ -1076,6 +1087,43 @@ static const MemoryRegionOps sungem_mmio_rxdma_ops = {
> },
> };
>
> +static void sungem_mmio_wol_write(void *opaque, hwaddr addr, uint64_t val,
> + unsigned size)
> +{
> + trace_sungem_mmio_wol_write(addr, val);
> +
> + switch (addr) {
> + case WOL_WAKECSR:
> + if (val != 0) {
> + qemu_log_mask(LOG_UNIMP, "sungem: WOL not supported\n");
> + }
> + break;
> + default:
> + qemu_log_mask(LOG_UNIMP, "sungem: WOL not supported\n");
> + }
> +}
> +
> +static uint64_t sungem_mmio_wol_read(void *opaque, hwaddr addr, unsigned
> size)
> +{
> + uint32_t val = -1;
> +
> + qemu_log_mask(LOG_UNIMP, "sungem: WOL not supported\n");
> +
> + trace_sungem_mmio_wol_read(addr, val);
> +
> + return val;
> +}
> +
> +static const MemoryRegionOps sungem_mmio_wol_ops = {
> + .read = sungem_mmio_wol_read,
> + .write = sungem_mmio_wol_write,
> + .endianness = DEVICE_LITTLE_ENDIAN,
> + .impl = {
> + .min_access_size = 4,
> + .max_access_size = 4,
> + },
> +};
> +
> static void sungem_mmio_mac_write(void *opaque, hwaddr addr, uint64_t val,
> unsigned size)
> {
> @@ -1344,6 +1392,10 @@ static void sungem_realize(PCIDevice *pci_dev, Error
> **errp)
> "sungem.rxdma", SUNGEM_MMIO_RXDMA_SIZE);
> memory_region_add_subregion(&s->sungem, 0x4000, &s->rxdma);
>
> + memory_region_init_io(&s->wol, OBJECT(s), &sungem_mmio_wol_ops, s,
> + "sungem.wol", SUNGEM_MMIO_WOL_SIZE);
> + memory_region_add_subregion(&s->sungem, 0x3000, &s->wol);
> +
> memory_region_init_io(&s->mac, OBJECT(s), &sungem_mmio_mac_ops, s,
> "sungem.mac", SUNGEM_MMIO_MAC_SIZE);
> memory_region_add_subregion(&s->sungem, 0x6000, &s->mac);
> diff --git a/hw/net/trace-events b/hw/net/trace-events
> index e4a98b2c7d..930e5b4293 100644
> --- a/hw/net/trace-events
> +++ b/hw/net/trace-events
> @@ -350,6 +350,8 @@ sungem_mmio_txdma_write(uint64_t addr, uint64_t val)
> "MMIO txdma write to 0x%"PR
> sungem_mmio_txdma_read(uint64_t addr, uint64_t val) "MMIO txdma read from
> 0x%"PRIx64" val=0x%"PRIx64
> sungem_mmio_rxdma_write(uint64_t addr, uint64_t val) "MMIO rxdma write to
> 0x%"PRIx64" val=0x%"PRIx64
> sungem_mmio_rxdma_read(uint64_t addr, uint64_t val) "MMIO rxdma read from
> 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_wol_write(uint64_t addr, uint64_t val) "MMIO wol write to
> 0x%"PRIx64" val=0x%"PRIx64
> +sungem_mmio_wol_read(uint64_t addr, uint64_t val) "MMIO wol read from
> 0x%"PRIx64" val=0x%"PRIx64
> sungem_mmio_mac_write(uint64_t addr, uint64_t val) "MMIO mac write to
> 0x%"PRIx64" val=0x%"PRIx64
> sungem_mmio_mac_read(uint64_t addr, uint64_t val) "MMIO mac read from
> 0x%"PRIx64" val=0x%"PRIx64
> sungem_mmio_mif_write(uint64_t addr, uint64_t val) "MMIO mif write to
> 0x%"PRIx64" val=0x%"PRIx64
> --
> 2.40.1
>
>