On Thu, Mar 24, 2022 at 04:37:22AM +0300, Serge Semin wrote: > Since DWC PCIe v4.70a the controller version can be read from the > PORT_LOGIC.PCIE_VERSION_OFF register. Version is represented in the FourCC > format [1]. It's standard versioning approach for the Synopsys DWC > IP-cores. Moreover some of the DWC kernel drivers already make use of it > to fixup version-dependent functionality (See DWC USB3, Stmicro STMMAC or > recent DW SPI driver). In order to preserve the standard version > representation and prevent the data conversion back and forth, we suggest > to preserve the native version representation in the DWC PCIe driver too > in the same way as it has already been done in the rest of the DWC > drivers. IP-core version reading from the CSR will be introduced in the > next commit together with a simple macro-based API to use it. > > [1] https://en.wikipedia.org/wiki/FourCC > > Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> > --- > drivers/pci/controller/dwc/pci-keystone.c | 12 ++++++------ > drivers/pci/controller/dwc/pcie-designware.c | 8 ++++---- > drivers/pci/controller/dwc/pcie-designware.h | 10 +++++++++- > drivers/pci/controller/dwc/pcie-intel-gw.c | 4 ++-- > drivers/pci/controller/dwc/pcie-tegra194.c | 2 +- > 5 files changed, 22 insertions(+), 14 deletions(-) > > diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c > index 1c2ee4e13f1c..ec65355dd29b 100644 > --- a/drivers/pci/controller/dwc/pci-keystone.c > +++ b/drivers/pci/controller/dwc/pci-keystone.c > @@ -109,7 +109,7 @@ struct ks_pcie_of_data { > enum dw_pcie_device_mode mode; > const struct dw_pcie_host_ops *host_ops; > const struct dw_pcie_ep_ops *ep_ops; > - unsigned int version; > + u32 version; > }; > > struct keystone_pcie { > @@ -1069,19 +1069,19 @@ static int ks_pcie_am654_set_mode(struct device *dev, > > static const struct ks_pcie_of_data ks_pcie_rc_of_data = { > .host_ops = &ks_pcie_host_ops, > - .version = 0x365A, > + .version = DW_PCIE_VER_365A, > }; > > static const struct ks_pcie_of_data ks_pcie_am654_rc_of_data = { > .host_ops = &ks_pcie_am654_host_ops, > .mode = DW_PCIE_RC_TYPE, > - .version = 0x490A, > + .version = DW_PCIE_VER_490A, This version should be readable, so get rid of hardcoding it here. > }; > > static const struct ks_pcie_of_data ks_pcie_am654_ep_of_data = { > .ep_ops = &ks_pcie_am654_ep_ops, > .mode = DW_PCIE_EP_TYPE, > - .version = 0x490A, > + .version = DW_PCIE_VER_490A, > }; > > static const struct of_device_id ks_pcie_of_match[] = { > @@ -1114,12 +1114,12 @@ static int __init ks_pcie_probe(struct platform_device *pdev) > struct device_link **link; > struct gpio_desc *gpiod; > struct resource *res; > - unsigned int version; > void __iomem *base; > u32 num_viewport; > struct phy **phy; > u32 num_lanes; > char name[10]; > + u32 version; > int ret; > int irq; > int i; > @@ -1233,7 +1233,7 @@ static int __init ks_pcie_probe(struct platform_device *pdev) > goto err_get_sync; > } > > - if (pci->version >= 0x480A) > + if (pci->version >= DW_PCIE_VER_480A) > ret = ks_pcie_am654_set_mode(dev, mode); > else > ret = ks_pcie_set_mode(dev); > diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c > index f1693e25afcb..c21373c6cb51 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.c > +++ b/drivers/pci/controller/dwc/pcie-designware.c > @@ -289,7 +289,7 @@ static void dw_pcie_prog_outbound_atu_unroll(struct dw_pcie *pci, u8 func_no, > val = type | PCIE_ATU_FUNC_NUM(func_no); > if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr)) > val |= PCIE_ATU_INCREASE_REGION_SIZE; > - if (pci->version == 0x490A) > + if (pci->version == DW_PCIE_VER_490A) > val = dw_pcie_enable_ecrc(val); > dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL1, val); > dw_pcie_writel_ob_unroll(pci, index, PCIE_ATU_UNR_REGION_CTRL2, > @@ -336,7 +336,7 @@ static void __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, > upper_32_bits(cpu_addr)); > dw_pcie_writel_dbi(pci, PCIE_ATU_LIMIT, > lower_32_bits(limit_addr)); > - if (pci->version >= 0x460A) > + if (pci->version >= DW_PCIE_VER_460A) > dw_pcie_writel_dbi(pci, PCIE_ATU_UPPER_LIMIT, > upper_32_bits(limit_addr)); > dw_pcie_writel_dbi(pci, PCIE_ATU_LOWER_TARGET, > @@ -345,9 +345,9 @@ static void __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, > upper_32_bits(pci_addr)); > val = type | PCIE_ATU_FUNC_NUM(func_no); > if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr) && > - pci->version >= 0x460A) > + pci->version >= DW_PCIE_VER_460A) > val |= PCIE_ATU_INCREASE_REGION_SIZE; > - if (pci->version == 0x490A) > + if (pci->version == DW_PCIE_VER_490A) > val = dw_pcie_enable_ecrc(val); > dw_pcie_writel_dbi(pci, PCIE_ATU_CR1, val); > dw_pcie_writel_dbi(pci, PCIE_ATU_CR2, PCIE_ATU_ENABLE); > diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h > index 7d6e9b7576be..5be43c662176 100644 > --- a/drivers/pci/controller/dwc/pcie-designware.h > +++ b/drivers/pci/controller/dwc/pcie-designware.h > @@ -20,6 +20,14 @@ > #include <linux/pci-epc.h> > #include <linux/pci-epf.h> > > +/* DWC PCIe IP-core versions (native support since v4.70a) */ > +#define DW_PCIE_VER_365A 0x3336352a > +#define DW_PCIE_VER_460A 0x3436302a > +#define DW_PCIE_VER_470A 0x3437302a > +#define DW_PCIE_VER_480A 0x3438302a > +#define DW_PCIE_VER_490A 0x3439302a > +#define DW_PCIE_VER_520A 0x3532302a Create a macro to form these so we can do: DW_PCIE_VER('5', '2', '0', 'A') > + > /* Parameters for the waiting for link up routine */ > #define LINK_WAIT_MAX_RETRIES 10 > #define LINK_WAIT_USLEEP_MIN 90000 > @@ -269,7 +277,7 @@ struct dw_pcie { > struct pcie_port pp; > struct dw_pcie_ep ep; > const struct dw_pcie_ops *ops; > - unsigned int version; > + u32 version; > int num_lanes; > int link_gen; > u8 n_fts[2]; > diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/controller/dwc/pcie-intel-gw.c > index 5ba144924ff8..786af2ba379f 100644 > --- a/drivers/pci/controller/dwc/pcie-intel-gw.c > +++ b/drivers/pci/controller/dwc/pcie-intel-gw.c > @@ -59,7 +59,7 @@ > #define RESET_INTERVAL_MS 100 > > struct intel_pcie_soc { > - unsigned int pcie_ver; > + u32 pcie_ver; > }; > > struct intel_pcie { > @@ -395,7 +395,7 @@ static const struct dw_pcie_host_ops intel_pcie_dw_ops = { > }; > > static const struct intel_pcie_soc pcie_data = { > - .pcie_ver = 0x520A, > + .pcie_ver = DW_PCIE_VER_520A, > }; > > static int intel_pcie_probe(struct platform_device *pdev) > diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c > index b1b5f836a806..6f1330ed63e5 100644 > --- a/drivers/pci/controller/dwc/pcie-tegra194.c > +++ b/drivers/pci/controller/dwc/pcie-tegra194.c > @@ -1981,7 +1981,7 @@ static int tegra194_pcie_probe(struct platform_device *pdev) > pci->ops = &tegra_dw_pcie_ops; > pci->n_fts[0] = N_FTS_VAL; > pci->n_fts[1] = FTS_VAL; > - pci->version = 0x490A; > + pci->version = DW_PCIE_VER_490A; > > pp = &pci->pp; > pp->num_vectors = MAX_MSI_IRQS; > -- > 2.35.1 >
