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platform/x86: ISST: Allow configurable offset range

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The mmio offset range can be different based on the PCI device id. Here
for INTEL_RAPL_PRIO_DEVID_1, the range is increased from 45 to 64. Pass
the range as the driver_data. Also account for different ranges during
save/restore via suspend/resume callbacks.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20201204015746.1168941-2-srinivas.pandruvada@linux.intel.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Srinivas Pandruvada 2020-12-03 17:57:45 -08:00 committed by Hans de Goede
parent a552f204b0
commit 761f0ee0e8
1 changed files with 36 additions and 14 deletions
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50
drivers/platform/x86/intel_speed_select_if/isst_if_mmio.c
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@ -20,15 +20,21 @@ struct isst_mmio_range {
int end;
};
struct isst_mmio_range mmio_range[] = {
struct isst_mmio_range mmio_range_devid_0[] = {
{0x04, 0x14},
{0x20, 0xD0},
};
struct isst_mmio_range mmio_range_devid_1[] = {
{0x04, 0x14},
{0x20, 0x11C},
};
struct isst_if_device {
void __iomem *punit_mmio;
u32 range_0[5];
u32 range_1[45];
u32 range_1[64];
struct isst_mmio_range *mmio_range;
struct mutex mutex;
};
@ -39,8 +45,6 @@ static long isst_if_mmio_rd_wr(u8 *cmd_ptr, int *write_only, int resume)
struct pci_dev *pdev;
io_reg = (struct isst_if_io_reg *)cmd_ptr;
if (io_reg->reg < 0x04 || io_reg->reg > 0xD0)
return -EINVAL;
if (io_reg->reg % 4)
return -EINVAL;
@ -56,6 +60,10 @@ static long isst_if_mmio_rd_wr(u8 *cmd_ptr, int *write_only, int resume)
if (!punit_dev)
return -EINVAL;
if (io_reg->reg < punit_dev->mmio_range[0].beg ||
io_reg->reg > punit_dev->mmio_range[1].end)
return -EINVAL;
/*
* Ensure that operation is complete on a PCI device to avoid read
* write race by using per PCI device mutex.
@ -74,8 +82,10 @@ static long isst_if_mmio_rd_wr(u8 *cmd_ptr, int *write_only, int resume)
}
static const struct pci_device_id isst_if_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_RAPL_PRIO_DEVID_0)},
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_RAPL_PRIO_DEVID_1)},
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_RAPL_PRIO_DEVID_0),
.driver_data = (kernel_ulong_t)&mmio_range_devid_0},
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, INTEL_RAPL_PRIO_DEVID_1),
.driver_data = (kernel_ulong_t)&mmio_range_devid_1},
{ 0 },
};
MODULE_DEVICE_TABLE(pci, isst_if_ids);
@ -112,6 +122,7 @@ static int isst_if_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
mutex_init(&punit_dev->mutex);
pci_set_drvdata(pdev, punit_dev);
punit_dev->mmio_range = (struct isst_mmio_range *) ent->driver_data;
memset(&cb, 0, sizeof(cb));
cb.cmd_size = sizeof(struct isst_if_io_reg);
@ -141,10 +152,15 @@ static int __maybe_unused isst_if_suspend(struct device *device)
for (i = 0; i < ARRAY_SIZE(punit_dev->range_0); ++i)
punit_dev->range_0[i] = readl(punit_dev->punit_mmio +
mmio_range[0].beg + 4 * i);
for (i = 0; i < ARRAY_SIZE(punit_dev->range_1); ++i)
punit_dev->range_1[i] = readl(punit_dev->punit_mmio +
mmio_range[1].beg + 4 * i);
punit_dev->mmio_range[0].beg + 4 * i);
for (i = 0; i < ARRAY_SIZE(punit_dev->range_1); ++i) {
u32 addr;
addr = punit_dev->mmio_range[1].beg + 4 * i;
if (addr > punit_dev->mmio_range[1].end)
break;
punit_dev->range_1[i] = readl(punit_dev->punit_mmio + addr);
}
return 0;
}
@ -156,10 +172,16 @@ static int __maybe_unused isst_if_resume(struct device *device)
for (i = 0; i < ARRAY_SIZE(punit_dev->range_0); ++i)
writel(punit_dev->range_0[i], punit_dev->punit_mmio +
mmio_range[0].beg + 4 * i);
for (i = 0; i < ARRAY_SIZE(punit_dev->range_1); ++i)
writel(punit_dev->range_1[i], punit_dev->punit_mmio +
mmio_range[1].beg + 4 * i);
punit_dev->mmio_range[0].beg + 4 * i);
for (i = 0; i < ARRAY_SIZE(punit_dev->range_1); ++i) {
u32 addr;
addr = punit_dev->mmio_range[1].beg + 4 * i;
if (addr > punit_dev->mmio_range[1].end)
break;
writel(punit_dev->range_1[i], punit_dev->punit_mmio + addr);
}
return 0;
}