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| author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2019-12-02 16:42:40 +1100 |
|---|---|---|
| committer | Oliver O'Halloran <oohall@gmail.com> | 2019-12-04 14:19:24 +1100 |
| commit | 08cd61e9d078419af6ef96ad7e626ae4ed5de9b6 (patch) | |
| tree | 632530bcf2265dd88d6c5190bff681250a3d62f6 /hw/phb4.c | |
| parent | 7853fc53cfccc20e7cca0b0bf18c5e84cd5d306c (diff) | |
| download | skiboot-08cd61e9d078419af6ef96ad7e626ae4ed5de9b6.zip skiboot-08cd61e9d078419af6ef96ad7e626ae4ed5de9b6.tar.gz skiboot-08cd61e9d078419af6ef96ad7e626ae4ed5de9b6.tar.bz2 | |
phb4: Add PHB options get/set OPAL calls
These are new OPAL calls to tweak various PHB parameters.
The first two are:
- TVT Select 'GTE4GB' Option of the PHB control register to enable use
of the second TVE for DMA trafic just above 4GB;
- MMIO EEH Disable to disable EEH for all MMIO commands.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Diffstat (limited to 'hw/phb4.c')
| -rw-r--r-- | hw/phb4.c | 59 |
1 files changed, 59 insertions, 0 deletions
@@ -1534,6 +1534,63 @@ static int64_t phb4_map_pe_dma_window_real(struct phb *phb, return OPAL_SUCCESS; } +static int64_t phb4_set_option(struct phb *phb, enum OpalPhbOption opt, + uint64_t setting) +{ + struct phb4 *p = phb_to_phb4(phb); + uint64_t data64; + + data64 = phb4_read_reg(p, PHB_CTRLR); + switch (opt) { + case OPAL_PHB_OPTION_TVE1_4GB: + if (setting > 1) + return OPAL_PARAMETER; + + PHBDBG(p, "4GB bypass mode = %lld\n", setting); + if (setting) + data64 |= PPC_BIT(24); + else + data64 &= ~PPC_BIT(24); + break; + case OPAL_PHB_OPTION_MMIO_EEH_DISABLE: + if (setting > 1) + return OPAL_PARAMETER; + + PHBDBG(p, "MMIO EEH Disable = %lld\n", setting); + if (setting) + data64 |= PPC_BIT(14); + else + data64 &= ~PPC_BIT(14); + break; + default: + return OPAL_UNSUPPORTED; + } + phb4_write_reg(p, PHB_CTRLR, data64); + + return OPAL_SUCCESS; +} + +static int64_t phb4_get_option(struct phb *phb, enum OpalPhbOption opt, + uint64_t *setting) +{ + struct phb4 *p = phb_to_phb4(phb); + uint64_t data64; + + data64 = phb4_read_reg(p, PHB_CTRLR); + switch (opt) { + case OPAL_PHB_OPTION_TVE1_4GB: + *setting = (data64 & PPC_BIT(24)) ? 1 : 0; + break; + case OPAL_PHB_OPTION_MMIO_EEH_DISABLE: + *setting = (data64 & PPC_BIT(14)) ? 1 : 0; + break; + default: + return OPAL_UNSUPPORTED; + } + + return OPAL_SUCCESS; +} + static int64_t phb4_set_ive_pe(struct phb *phb, uint64_t pe_number, uint32_t ive_num) @@ -4796,6 +4853,8 @@ static const struct phb_ops phb4_ops = { .map_pe_mmio_window = phb4_map_pe_mmio_window, .map_pe_dma_window = phb4_map_pe_dma_window, .map_pe_dma_window_real = phb4_map_pe_dma_window_real, + .set_option = phb4_set_option, + .get_option = phb4_get_option, .set_xive_pe = phb4_set_ive_pe, .get_msi_32 = phb4_get_msi_32, .get_msi_64 = phb4_get_msi_64, |