| Message ID | 20240402-pci2_upstream-v3-8-803414bdb430@nxp.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | PCI: imx6: Fix\rename\clean up and add lut information for imx95 | expand |
PCI: imx6: Add support for configuring BDF to SID mapping for i.MX95 On Tue, Apr 02, 2024 at 10:33:44AM -0400, Frank Li wrote: > i.MX95 need config LUT to convert bpf to stream id. IOMMU and ITS use the Did you mean BDF? Here and everywhere. > same stream id. Check msi-map and smmu-map and make sure the same PCI bpf > map to the same stream id. Then config LUT related registers. > These DT properties not documented in the binding. > Signed-off-by: Frank Li <Frank.Li@nxp.com> > --- > drivers/pci/controller/dwc/pcie-imx.c | 175 ++++++++++++++++++++++++++++++++++ > 1 file changed, 175 insertions(+) > > diff --git a/drivers/pci/controller/dwc/pcie-imx.c b/drivers/pci/controller/dwc/pcie-imx.c > index af0f960f28757..653d8e8ee1abc 100644 > --- a/drivers/pci/controller/dwc/pcie-imx.c > +++ b/drivers/pci/controller/dwc/pcie-imx.c > @@ -55,6 +55,22 @@ > #define IMX95_PE0_GEN_CTRL_3 0x1058 > #define IMX95_PCIE_LTSSM_EN BIT(0) > > +#define IMX95_PE0_LUT_ACSCTRL 0x1008 > +#define IMX95_PEO_LUT_RWA BIT(16) > +#define IMX95_PE0_LUT_ENLOC GENMASK(4, 0) > + > +#define IMX95_PE0_LUT_DATA1 0x100c > +#define IMX95_PE0_LUT_VLD BIT(31) > +#define IMX95_PE0_LUT_DAC_ID GENMASK(10, 8) > +#define IMX95_PE0_LUT_STREAM_ID GENMASK(5, 0) > + > +#define IMX95_PE0_LUT_DATA2 0x1010 > +#define IMX95_PE0_LUT_REQID GENMASK(31, 16) > +#define IMX95_PE0_LUT_MASK GENMASK(15, 0) > + > +#define IMX95_SID_MASK GENMASK(5, 0) > +#define IMX95_MAX_LUT 32 > + > #define to_imx_pcie(x) dev_get_drvdata((x)->dev) > > enum imx_pcie_variants { > @@ -217,6 +233,159 @@ static int imx95_pcie_init_phy(struct imx_pcie *imx_pcie) > return 0; > } > > +static int imx_pcie_update_lut(struct imx_pcie *imx_pcie, int index, u16 reqid, u16 mask, u8 sid) > +{ > + struct dw_pcie *pci = imx_pcie->pci; > + struct device *dev = pci->dev; > + u32 data1, data2; > + > + if (sid >= 64) { > + dev_err(dev, "Too big stream id: %d\n", sid); 'Invalid SID for index (%d): %d\n', index, sid > + return -EINVAL; > + } > + > + data1 = FIELD_PREP(IMX95_PE0_LUT_DAC_ID, 0); > + data1 |= FIELD_PREP(IMX95_PE0_LUT_STREAM_ID, sid); > + data1 |= IMX95_PE0_LUT_VLD; > + > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA1, data1); > + > + data2 = mask; > + data2 |= FIELD_PREP(IMX95_PE0_LUT_REQID, reqid); > + > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA2, data2); > + > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_ACSCTRL, index); > + > + return 0; > +} > + > +struct imx_of_map { imx_iommu_map > + u32 bdf; > + u32 phandle; > + u32 sid; > + u32 sid_len; > +}; > + > +static int imx_check_msi_and_smmmu(struct imx_pcie *imx_pcie, > + struct imx_of_map *msi_map, u32 msi_size, u32 msi_map_mask, > + struct imx_of_map *smmu_map, u32 smmu_size, u32 smmu_map_mask) > +{ > + struct dw_pcie *pci = imx_pcie->pci; > + struct device *dev = pci->dev; > + int i; > + if (!msi_map || !smmu_map) return 0; > + if (msi_map && smmu_map) { > + if (msi_size != smmu_size) > + return -EINVAL; > + if (msi_map_mask != smmu_map_mask) > + return -EINVAL; if (msi_size != smmu_size || msi_map_mask != smmu_map_mask) return -EINVAL; > + > + for (i = 0; i < msi_size / sizeof(*msi_map); i++) { > + if (msi_map->bdf != smmu_map->bdf) { > + dev_err(dev, "bdf setting is not match\n"); 'BDF mismatch between msi-map and iommu-map' > + return -EINVAL; > + } > + if ((msi_map->sid & IMX95_SID_MASK) != smmu_map->sid) { > + dev_err(dev, "sid setting is not match\n"); 'SID mismatch between msi-map and iommu-map' > + return -EINVAL; > + } > + if ((msi_map->sid_len & IMX95_SID_MASK) != smmu_map->sid_len) { > + dev_err(dev, "sid_len setting is not match\n"); 'SID length mismatch between msi-map and iommu-map' > + return -EINVAL; > + } > + } > + } > + > + return 0; > +} > + > +/* > + * Simple static config lut according to dts settings DAC index and stream ID used as a match result > + * of LUT pre-allocated and used by PCIes. > + * Please reword the above sentence. > + * Currently stream ID from 32-64 for PCIe. > + * 32-40: first PCI bus. > + * 40-48: second PCI bus. I believe this is an SoC specific info. So better not add it here. It belongs to DT. > + * > + * DAC_ID is index of TRDC.DAC index, start from 2 at iMX95. > + * ITS [pci(2bit): streamid(6bits)] > + * pci 0 is 0 > + * pci 1 is 3 > + */ > +static int imx_pcie_config_sid(struct imx_pcie *imx_pcie) > +{ > + struct imx_of_map *msi_map = NULL, *smmu_map = NULL, *cur; > + int i, j, lut_index, nr_map, msi_size = 0, smmu_size = 0; > + u32 msi_map_mask = 0xffff, smmu_map_mask = 0xffff; > + struct dw_pcie *pci = imx_pcie->pci; > + struct device *dev = pci->dev; > + u32 mask; > + int size; > + > + of_get_property(dev->of_node, "msi-map", &msi_size); > + if (msi_size) { You mentioned in the commit message that msi-map and iommu-map needs to be the same for this SoC. But here you are just ignoring the absence of 'msi-map' property. > + msi_map = devm_kzalloc(dev, msi_size, GFP_KERNEL); > + if (!msi_map) > + return -ENOMEM; > + > + if (of_property_read_u32_array(dev->of_node, "msi-map", (u32 *)msi_map, > + msi_size / sizeof(u32))) > + return -EINVAL; > + > + of_property_read_u32(dev->of_node, "msi-map-mask", &msi_map_mask); > + } > + > + cur = msi_map; > + size = msi_size; > + mask = msi_map_mask; > + > + of_get_property(dev->of_node, "iommu-map", &smmu_size); Same comment as above. > + if (smmu_size) { > + smmu_map = devm_kzalloc(dev, smmu_size, GFP_KERNEL); > + if (!smmu_map) > + return -ENOMEM; > + > + if (of_property_read_u32_array(dev->of_node, "iommu-map", (u32 *)smmu_map, > + smmu_size / sizeof(u32))) > + return -EINVAL; > + > + of_property_read_u32(dev->of_node, "iommu_map_mask", &smmu_map_mask); > + } > + > + if (imx_check_msi_and_smmmu(imx_pcie, msi_map, msi_size, msi_map_mask, > + smmu_map, smmu_size, smmu_map_mask)) > + return -EINVAL; > + Hmm, so you want to continue even if the 'msi-map' and 'iommu-map' properties don't exist i.e., for old platforms? > + if (!cur) { > + cur = smmu_map; > + size = smmu_size; > + mask = smmu_map_mask; > + } > + > + nr_map = size / (sizeof(*cur)); > + > + lut_index = 0; Just initialize it while defining itself. > + for (i = 0; i < nr_map; i++) { > + for (j = 0; j < cur->sid_len; j++) { > + imx_pcie_update_lut(imx_pcie, lut_index, cur->bdf + j, mask, > + (cur->sid + j) & IMX95_SID_MASK); > + lut_index++; > + } > + cur++; > + > + if (lut_index >= IMX95_MAX_LUT) { > + dev_err(dev, "its-map/iommu-map exceed HW limiation\n"); 'Too many msi-map/iommu-map entries' But I think you can just continue to use the allowed entries. > + return -EINVAL; > + } > + } > + > + devm_kfree(dev, smmu_map); > + devm_kfree(dev, msi_map); Please don't explicitly free the devm_ managed resources unless really needed. Else don't use devm_ at all. > + > + return 0; > +} > + > static void imx_pcie_configure_type(struct imx_pcie *imx_pcie) > { > const struct imx_pcie_drvdata *drvdata = imx_pcie->drvdata; > @@ -950,6 +1119,12 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp) > goto err_phy_off; > } > > + ret = imx_pcie_config_sid(imx_pcie); > + if (ret < 0) { > + dev_err(dev, "failed to config sid:%d\n", ret); 'Failed to config BDF to SID mapping: %d\n' - Mani
On Sat, Apr 27, 2024 at 05:06:43PM +0530, Manivannan Sadhasivam wrote: > PCI: imx6: Add support for configuring BDF to SID mapping for i.MX95 > > On Tue, Apr 02, 2024 at 10:33:44AM -0400, Frank Li wrote: > > i.MX95 need config LUT to convert bpf to stream id. IOMMU and ITS use the > > Did you mean BDF? Here and everywhere. > > > same stream id. Check msi-map and smmu-map and make sure the same PCI bpf > > map to the same stream id. Then config LUT related registers. > > > > These DT properties not documented in the binding. They are in the common binding. Rob
On Tue, Apr 02, 2024 at 10:33:44AM -0400, Frank Li wrote: > i.MX95 need config LUT to convert bpf to stream id. IOMMU and ITS use the > same stream id. Check msi-map and smmu-map and make sure the same PCI bpf > map to the same stream id. Then config LUT related registers. > > Signed-off-by: Frank Li <Frank.Li@nxp.com> > --- > drivers/pci/controller/dwc/pcie-imx.c | 175 ++++++++++++++++++++++++++++++++++ > 1 file changed, 175 insertions(+) > > diff --git a/drivers/pci/controller/dwc/pcie-imx.c b/drivers/pci/controller/dwc/pcie-imx.c > index af0f960f28757..653d8e8ee1abc 100644 > --- a/drivers/pci/controller/dwc/pcie-imx.c > +++ b/drivers/pci/controller/dwc/pcie-imx.c > @@ -55,6 +55,22 @@ > #define IMX95_PE0_GEN_CTRL_3 0x1058 > #define IMX95_PCIE_LTSSM_EN BIT(0) > > +#define IMX95_PE0_LUT_ACSCTRL 0x1008 > +#define IMX95_PEO_LUT_RWA BIT(16) > +#define IMX95_PE0_LUT_ENLOC GENMASK(4, 0) > + > +#define IMX95_PE0_LUT_DATA1 0x100c > +#define IMX95_PE0_LUT_VLD BIT(31) > +#define IMX95_PE0_LUT_DAC_ID GENMASK(10, 8) > +#define IMX95_PE0_LUT_STREAM_ID GENMASK(5, 0) > + > +#define IMX95_PE0_LUT_DATA2 0x1010 > +#define IMX95_PE0_LUT_REQID GENMASK(31, 16) > +#define IMX95_PE0_LUT_MASK GENMASK(15, 0) > + > +#define IMX95_SID_MASK GENMASK(5, 0) > +#define IMX95_MAX_LUT 32 > + > #define to_imx_pcie(x) dev_get_drvdata((x)->dev) > > enum imx_pcie_variants { > @@ -217,6 +233,159 @@ static int imx95_pcie_init_phy(struct imx_pcie *imx_pcie) > return 0; > } > > +static int imx_pcie_update_lut(struct imx_pcie *imx_pcie, int index, u16 reqid, u16 mask, u8 sid) > +{ > + struct dw_pcie *pci = imx_pcie->pci; > + struct device *dev = pci->dev; > + u32 data1, data2; > + > + if (sid >= 64) { > + dev_err(dev, "Too big stream id: %d\n", sid); > + return -EINVAL; > + } > + > + data1 = FIELD_PREP(IMX95_PE0_LUT_DAC_ID, 0); > + data1 |= FIELD_PREP(IMX95_PE0_LUT_STREAM_ID, sid); > + data1 |= IMX95_PE0_LUT_VLD; > + > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA1, data1); > + > + data2 = mask; > + data2 |= FIELD_PREP(IMX95_PE0_LUT_REQID, reqid); > + > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA2, data2); > + > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_ACSCTRL, index); > + > + return 0; > +} > + > +struct imx_of_map { > + u32 bdf; > + u32 phandle; > + u32 sid; > + u32 sid_len; > +}; > + > +static int imx_check_msi_and_smmmu(struct imx_pcie *imx_pcie, > + struct imx_of_map *msi_map, u32 msi_size, u32 msi_map_mask, > + struct imx_of_map *smmu_map, u32 smmu_size, u32 smmu_map_mask) > +{ > + struct dw_pcie *pci = imx_pcie->pci; > + struct device *dev = pci->dev; > + int i; > + > + if (msi_map && smmu_map) { > + if (msi_size != smmu_size) > + return -EINVAL; > + if (msi_map_mask != smmu_map_mask) > + return -EINVAL; > + > + for (i = 0; i < msi_size / sizeof(*msi_map); i++) { > + if (msi_map->bdf != smmu_map->bdf) { > + dev_err(dev, "bdf setting is not match\n"); > + return -EINVAL; > + } > + if ((msi_map->sid & IMX95_SID_MASK) != smmu_map->sid) { > + dev_err(dev, "sid setting is not match\n"); > + return -EINVAL; > + } > + if ((msi_map->sid_len & IMX95_SID_MASK) != smmu_map->sid_len) { > + dev_err(dev, "sid_len setting is not match\n"); > + return -EINVAL; > + } > + } > + } > + > + return 0; > +} > + > +/* > + * Simple static config lut according to dts settings DAC index and stream ID used as a match result > + * of LUT pre-allocated and used by PCIes. > + * > + * Currently stream ID from 32-64 for PCIe. > + * 32-40: first PCI bus. > + * 40-48: second PCI bus. > + * > + * DAC_ID is index of TRDC.DAC index, start from 2 at iMX95. > + * ITS [pci(2bit): streamid(6bits)] > + * pci 0 is 0 > + * pci 1 is 3 > + */ > +static int imx_pcie_config_sid(struct imx_pcie *imx_pcie) > +{ > + struct imx_of_map *msi_map = NULL, *smmu_map = NULL, *cur; > + int i, j, lut_index, nr_map, msi_size = 0, smmu_size = 0; > + u32 msi_map_mask = 0xffff, smmu_map_mask = 0xffff; > + struct dw_pcie *pci = imx_pcie->pci; > + struct device *dev = pci->dev; > + u32 mask; > + int size; > + > + of_get_property(dev->of_node, "msi-map", &msi_size); > + if (msi_size) { > + msi_map = devm_kzalloc(dev, msi_size, GFP_KERNEL); > + if (!msi_map) > + return -ENOMEM; > + > + if (of_property_read_u32_array(dev->of_node, "msi-map", (u32 *)msi_map, > + msi_size / sizeof(u32))) > + return -EINVAL; > + > + of_property_read_u32(dev->of_node, "msi-map-mask", &msi_map_mask); > + } > + > + cur = msi_map; > + size = msi_size; > + mask = msi_map_mask; > + > + of_get_property(dev->of_node, "iommu-map", &smmu_size); > + if (smmu_size) { > + smmu_map = devm_kzalloc(dev, smmu_size, GFP_KERNEL); > + if (!smmu_map) > + return -ENOMEM; > + > + if (of_property_read_u32_array(dev->of_node, "iommu-map", (u32 *)smmu_map, > + smmu_size / sizeof(u32))) > + return -EINVAL; > + > + of_property_read_u32(dev->of_node, "iommu_map_mask", &smmu_map_mask); > + } You should not be doing your own parsing of these properties. Rob
On Sat, Apr 27, 2024 at 05:06:43PM +0530, Manivannan Sadhasivam wrote: > PCI: imx6: Add support for configuring BDF to SID mapping for i.MX95 > > On Tue, Apr 02, 2024 at 10:33:44AM -0400, Frank Li wrote: > > i.MX95 need config LUT to convert bpf to stream id. IOMMU and ITS use the > > Did you mean BDF? Here and everywhere. > > > same stream id. Check msi-map and smmu-map and make sure the same PCI bpf > > map to the same stream id. Then config LUT related registers. > > > > These DT properties not documented in the binding. > > > Signed-off-by: Frank Li <Frank.Li@nxp.com> > > --- > > drivers/pci/controller/dwc/pcie-imx.c | 175 ++++++++++++++++++++++++++++++++++ > > 1 file changed, 175 insertions(+) > > > > diff --git a/drivers/pci/controller/dwc/pcie-imx.c b/drivers/pci/controller/dwc/pcie-imx.c > > index af0f960f28757..653d8e8ee1abc 100644 > > --- a/drivers/pci/controller/dwc/pcie-imx.c > > +++ b/drivers/pci/controller/dwc/pcie-imx.c > > @@ -55,6 +55,22 @@ > > #define IMX95_PE0_GEN_CTRL_3 0x1058 > > #define IMX95_PCIE_LTSSM_EN BIT(0) > > > > +#define IMX95_PE0_LUT_ACSCTRL 0x1008 > > +#define IMX95_PEO_LUT_RWA BIT(16) > > +#define IMX95_PE0_LUT_ENLOC GENMASK(4, 0) > > + > > +#define IMX95_PE0_LUT_DATA1 0x100c > > +#define IMX95_PE0_LUT_VLD BIT(31) > > +#define IMX95_PE0_LUT_DAC_ID GENMASK(10, 8) > > +#define IMX95_PE0_LUT_STREAM_ID GENMASK(5, 0) > > + > > +#define IMX95_PE0_LUT_DATA2 0x1010 > > +#define IMX95_PE0_LUT_REQID GENMASK(31, 16) > > +#define IMX95_PE0_LUT_MASK GENMASK(15, 0) > > + > > +#define IMX95_SID_MASK GENMASK(5, 0) > > +#define IMX95_MAX_LUT 32 > > + > > #define to_imx_pcie(x) dev_get_drvdata((x)->dev) > > > > enum imx_pcie_variants { > > @@ -217,6 +233,159 @@ static int imx95_pcie_init_phy(struct imx_pcie *imx_pcie) > > return 0; > > } > > > > +static int imx_pcie_update_lut(struct imx_pcie *imx_pcie, int index, u16 reqid, u16 mask, u8 sid) > > +{ > > + struct dw_pcie *pci = imx_pcie->pci; > > + struct device *dev = pci->dev; > > + u32 data1, data2; > > + > > + if (sid >= 64) { > > + dev_err(dev, "Too big stream id: %d\n", sid); > > 'Invalid SID for index (%d): %d\n', index, sid > > > + return -EINVAL; > > + } > > + > > + data1 = FIELD_PREP(IMX95_PE0_LUT_DAC_ID, 0); > > + data1 |= FIELD_PREP(IMX95_PE0_LUT_STREAM_ID, sid); > > + data1 |= IMX95_PE0_LUT_VLD; > > + > > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA1, data1); > > + > > + data2 = mask; > > + data2 |= FIELD_PREP(IMX95_PE0_LUT_REQID, reqid); > > + > > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA2, data2); > > + > > + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_ACSCTRL, index); > > + > > + return 0; > > +} > > + > > +struct imx_of_map { > > imx_iommu_map > > > + u32 bdf; > > + u32 phandle; > > + u32 sid; > > + u32 sid_len; > > +}; > > + > > +static int imx_check_msi_and_smmmu(struct imx_pcie *imx_pcie, > > + struct imx_of_map *msi_map, u32 msi_size, u32 msi_map_mask, > > + struct imx_of_map *smmu_map, u32 smmu_size, u32 smmu_map_mask) > > +{ > > + struct dw_pcie *pci = imx_pcie->pci; > > + struct device *dev = pci->dev; > > + int i; > > + > > if (!msi_map || !smmu_map) > return 0; > > > + if (msi_map && smmu_map) { > > + if (msi_size != smmu_size) > > + return -EINVAL; > > + if (msi_map_mask != smmu_map_mask) > > + return -EINVAL; > > if (msi_size != smmu_size || msi_map_mask != smmu_map_mask) > return -EINVAL; > > > + > > + for (i = 0; i < msi_size / sizeof(*msi_map); i++) { > > + if (msi_map->bdf != smmu_map->bdf) { > > + dev_err(dev, "bdf setting is not match\n"); > > 'BDF mismatch between msi-map and iommu-map' > > > + return -EINVAL; > > + } > > + if ((msi_map->sid & IMX95_SID_MASK) != smmu_map->sid) { > > + dev_err(dev, "sid setting is not match\n"); > > 'SID mismatch between msi-map and iommu-map' > > > + return -EINVAL; > > + } > > + if ((msi_map->sid_len & IMX95_SID_MASK) != smmu_map->sid_len) { > > + dev_err(dev, "sid_len setting is not match\n"); > > 'SID length mismatch between msi-map and iommu-map' > > > + return -EINVAL; > > + } > > + } > > + } > > + > > + return 0; > > +} > > + > > +/* > > + * Simple static config lut according to dts settings DAC index and stream ID used as a match result > > + * of LUT pre-allocated and used by PCIes. > > + * > > Please reword the above sentence. How about: "A straightforward static configuration lookup table (LUT) is established based on the stream ID specified in the DTS settings." > > > + * Currently stream ID from 32-64 for PCIe. > > + * 32-40: first PCI bus. > > + * 40-48: second PCI bus. > > I believe this is an SoC specific info. So better not add it here. It belongs to > DT. > > > + * > > + * DAC_ID is index of TRDC.DAC index, start from 2 at iMX95. > > + * ITS [pci(2bit): streamid(6bits)] > > + * pci 0 is 0 > > + * pci 1 is 3 > > + */ > > +static int imx_pcie_config_sid(struct imx_pcie *imx_pcie) > > +{ > > + struct imx_of_map *msi_map = NULL, *smmu_map = NULL, *cur; > > + int i, j, lut_index, nr_map, msi_size = 0, smmu_size = 0; > > + u32 msi_map_mask = 0xffff, smmu_map_mask = 0xffff; > > + struct dw_pcie *pci = imx_pcie->pci; > > + struct device *dev = pci->dev; > > + u32 mask; > > + int size; > > + > > + of_get_property(dev->of_node, "msi-map", &msi_size); > > + if (msi_size) { > > You mentioned in the commit message that msi-map and iommu-map needs to be the > same for this SoC. But here you are just ignoring the absence of 'msi-map' > property. If msi-map not exist, it will be fail back to use DWC's msi controller insteand of ITS. Do you think need comments here for that? > > > + msi_map = devm_kzalloc(dev, msi_size, GFP_KERNEL); > > + if (!msi_map) > > + return -ENOMEM; > > + > > + if (of_property_read_u32_array(dev->of_node, "msi-map", (u32 *)msi_map, > > + msi_size / sizeof(u32))) > > + return -EINVAL; > > + > > + of_property_read_u32(dev->of_node, "msi-map-mask", &msi_map_mask); > > + } > > + > > + cur = msi_map; > > + size = msi_size; > > + mask = msi_map_mask; > > + > > + of_get_property(dev->of_node, "iommu-map", &smmu_size); > > Same comment as above. If iommu-map was not exist, it will work without iommu. the combination as below (4 cases). not-exist exit msi-map dw-msi its iommu-map by-pass-mmu smmu Require stream id must be the same only when both msi-map and iommu exist. > > > + if (smmu_size) { > > + smmu_map = devm_kzalloc(dev, smmu_size, GFP_KERNEL); > > + if (!smmu_map) > > + return -ENOMEM; > > + > > + if (of_property_read_u32_array(dev->of_node, "iommu-map", (u32 *)smmu_map, > > + smmu_size / sizeof(u32))) > > + return -EINVAL; > > + > > + of_property_read_u32(dev->of_node, "iommu_map_mask", &smmu_map_mask); > > + } > > + > > + if (imx_check_msi_and_smmmu(imx_pcie, msi_map, msi_size, msi_map_mask, > > + smmu_map, smmu_size, smmu_map_mask)) > > + return -EINVAL; > > + > > Hmm, so you want to continue even if the 'msi-map' and 'iommu-map' properties > don't exist i.e., for old platforms? imx_check_msi_and_smmmu() will return 0 when smmu_map is null. > > > + if (!cur) { > > + cur = smmu_map; > > + size = smmu_size; > > + mask = smmu_map_mask; > > + } > > + > > + nr_map = size / (sizeof(*cur)); > > + > > + lut_index = 0; > > Just initialize it while defining itself. > > > + for (i = 0; i < nr_map; i++) { > > + for (j = 0; j < cur->sid_len; j++) { > > + imx_pcie_update_lut(imx_pcie, lut_index, cur->bdf + j, mask, > > + (cur->sid + j) & IMX95_SID_MASK); > > + lut_index++; > > + } > > + cur++; > > + > > + if (lut_index >= IMX95_MAX_LUT) { > > + dev_err(dev, "its-map/iommu-map exceed HW limiation\n"); > > 'Too many msi-map/iommu-map entries' > > But I think you can just continue to use the allowed entries. > > > + return -EINVAL; > > + } > > + } > > + > > + devm_kfree(dev, smmu_map); > > + devm_kfree(dev, msi_map); > > Please don't explicitly free the devm_ managed resources unless really needed. > Else don't use devm_ at all. It'd better use auto clean up function __free(kfree) here. > > > + > > + return 0; > > +} > > + > > static void imx_pcie_configure_type(struct imx_pcie *imx_pcie) > > { > > const struct imx_pcie_drvdata *drvdata = imx_pcie->drvdata; > > @@ -950,6 +1119,12 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp) > > goto err_phy_off; > > } > > > > + ret = imx_pcie_config_sid(imx_pcie); > > + if (ret < 0) { > > + dev_err(dev, "failed to config sid:%d\n", ret); > > 'Failed to config BDF to SID mapping: %d\n' > > - Mani > > -- > மணிவண்ணன் சதாசிவம்
diff --git a/drivers/pci/controller/dwc/pcie-imx.c b/drivers/pci/controller/dwc/pcie-imx.c index af0f960f28757..653d8e8ee1abc 100644 --- a/drivers/pci/controller/dwc/pcie-imx.c +++ b/drivers/pci/controller/dwc/pcie-imx.c @@ -55,6 +55,22 @@ #define IMX95_PE0_GEN_CTRL_3 0x1058 #define IMX95_PCIE_LTSSM_EN BIT(0) +#define IMX95_PE0_LUT_ACSCTRL 0x1008 +#define IMX95_PEO_LUT_RWA BIT(16) +#define IMX95_PE0_LUT_ENLOC GENMASK(4, 0) + +#define IMX95_PE0_LUT_DATA1 0x100c +#define IMX95_PE0_LUT_VLD BIT(31) +#define IMX95_PE0_LUT_DAC_ID GENMASK(10, 8) +#define IMX95_PE0_LUT_STREAM_ID GENMASK(5, 0) + +#define IMX95_PE0_LUT_DATA2 0x1010 +#define IMX95_PE0_LUT_REQID GENMASK(31, 16) +#define IMX95_PE0_LUT_MASK GENMASK(15, 0) + +#define IMX95_SID_MASK GENMASK(5, 0) +#define IMX95_MAX_LUT 32 + #define to_imx_pcie(x) dev_get_drvdata((x)->dev) enum imx_pcie_variants { @@ -217,6 +233,159 @@ static int imx95_pcie_init_phy(struct imx_pcie *imx_pcie) return 0; } +static int imx_pcie_update_lut(struct imx_pcie *imx_pcie, int index, u16 reqid, u16 mask, u8 sid) +{ + struct dw_pcie *pci = imx_pcie->pci; + struct device *dev = pci->dev; + u32 data1, data2; + + if (sid >= 64) { + dev_err(dev, "Too big stream id: %d\n", sid); + return -EINVAL; + } + + data1 = FIELD_PREP(IMX95_PE0_LUT_DAC_ID, 0); + data1 |= FIELD_PREP(IMX95_PE0_LUT_STREAM_ID, sid); + data1 |= IMX95_PE0_LUT_VLD; + + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA1, data1); + + data2 = mask; + data2 |= FIELD_PREP(IMX95_PE0_LUT_REQID, reqid); + + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_DATA2, data2); + + regmap_write(imx_pcie->iomuxc_gpr, IMX95_PE0_LUT_ACSCTRL, index); + + return 0; +} + +struct imx_of_map { + u32 bdf; + u32 phandle; + u32 sid; + u32 sid_len; +}; + +static int imx_check_msi_and_smmmu(struct imx_pcie *imx_pcie, + struct imx_of_map *msi_map, u32 msi_size, u32 msi_map_mask, + struct imx_of_map *smmu_map, u32 smmu_size, u32 smmu_map_mask) +{ + struct dw_pcie *pci = imx_pcie->pci; + struct device *dev = pci->dev; + int i; + + if (msi_map && smmu_map) { + if (msi_size != smmu_size) + return -EINVAL; + if (msi_map_mask != smmu_map_mask) + return -EINVAL; + + for (i = 0; i < msi_size / sizeof(*msi_map); i++) { + if (msi_map->bdf != smmu_map->bdf) { + dev_err(dev, "bdf setting is not match\n"); + return -EINVAL; + } + if ((msi_map->sid & IMX95_SID_MASK) != smmu_map->sid) { + dev_err(dev, "sid setting is not match\n"); + return -EINVAL; + } + if ((msi_map->sid_len & IMX95_SID_MASK) != smmu_map->sid_len) { + dev_err(dev, "sid_len setting is not match\n"); + return -EINVAL; + } + } + } + + return 0; +} + +/* + * Simple static config lut according to dts settings DAC index and stream ID used as a match result + * of LUT pre-allocated and used by PCIes. + * + * Currently stream ID from 32-64 for PCIe. + * 32-40: first PCI bus. + * 40-48: second PCI bus. + * + * DAC_ID is index of TRDC.DAC index, start from 2 at iMX95. + * ITS [pci(2bit): streamid(6bits)] + * pci 0 is 0 + * pci 1 is 3 + */ +static int imx_pcie_config_sid(struct imx_pcie *imx_pcie) +{ + struct imx_of_map *msi_map = NULL, *smmu_map = NULL, *cur; + int i, j, lut_index, nr_map, msi_size = 0, smmu_size = 0; + u32 msi_map_mask = 0xffff, smmu_map_mask = 0xffff; + struct dw_pcie *pci = imx_pcie->pci; + struct device *dev = pci->dev; + u32 mask; + int size; + + of_get_property(dev->of_node, "msi-map", &msi_size); + if (msi_size) { + msi_map = devm_kzalloc(dev, msi_size, GFP_KERNEL); + if (!msi_map) + return -ENOMEM; + + if (of_property_read_u32_array(dev->of_node, "msi-map", (u32 *)msi_map, + msi_size / sizeof(u32))) + return -EINVAL; + + of_property_read_u32(dev->of_node, "msi-map-mask", &msi_map_mask); + } + + cur = msi_map; + size = msi_size; + mask = msi_map_mask; + + of_get_property(dev->of_node, "iommu-map", &smmu_size); + if (smmu_size) { + smmu_map = devm_kzalloc(dev, smmu_size, GFP_KERNEL); + if (!smmu_map) + return -ENOMEM; + + if (of_property_read_u32_array(dev->of_node, "iommu-map", (u32 *)smmu_map, + smmu_size / sizeof(u32))) + return -EINVAL; + + of_property_read_u32(dev->of_node, "iommu_map_mask", &smmu_map_mask); + } + + if (imx_check_msi_and_smmmu(imx_pcie, msi_map, msi_size, msi_map_mask, + smmu_map, smmu_size, smmu_map_mask)) + return -EINVAL; + + if (!cur) { + cur = smmu_map; + size = smmu_size; + mask = smmu_map_mask; + } + + nr_map = size / (sizeof(*cur)); + + lut_index = 0; + for (i = 0; i < nr_map; i++) { + for (j = 0; j < cur->sid_len; j++) { + imx_pcie_update_lut(imx_pcie, lut_index, cur->bdf + j, mask, + (cur->sid + j) & IMX95_SID_MASK); + lut_index++; + } + cur++; + + if (lut_index >= IMX95_MAX_LUT) { + dev_err(dev, "its-map/iommu-map exceed HW limiation\n"); + return -EINVAL; + } + } + + devm_kfree(dev, smmu_map); + devm_kfree(dev, msi_map); + + return 0; +} + static void imx_pcie_configure_type(struct imx_pcie *imx_pcie) { const struct imx_pcie_drvdata *drvdata = imx_pcie->drvdata; @@ -950,6 +1119,12 @@ static int imx_pcie_host_init(struct dw_pcie_rp *pp) goto err_phy_off; } + ret = imx_pcie_config_sid(imx_pcie); + if (ret < 0) { + dev_err(dev, "failed to config sid:%d\n", ret); + goto err_phy_off; + } + imx_setup_phy_mpll(imx_pcie); return 0;
i.MX95 need config LUT to convert bpf to stream id. IOMMU and ITS use the same stream id. Check msi-map and smmu-map and make sure the same PCI bpf map to the same stream id. Then config LUT related registers. Signed-off-by: Frank Li <Frank.Li@nxp.com> --- drivers/pci/controller/dwc/pcie-imx.c | 175 ++++++++++++++++++++++++++++++++++ 1 file changed, 175 insertions(+)