On Thu, Nov 24, 2016 at 09:54:20AM +0800, Shawn Lin wrote:
> We split out a new function, rockchip_cfg_atu, in order to
> re-configure the atu when missing these information after
> wakeup from S3.
>
> Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
>
> Reviewed-by: Brian Norris <briannorris@xxxxxxxxxxxx>
I applied the first two to pci/host-rockchip for v4.10, thanks!
> ---
>
> Changes in v3: None
> Changes in v2:
> - remove msg region support
>
> drivers/pci/host/pcie-rockchip.c | 104 +++++++++++++++++++++------------------
> 1 file changed, 55 insertions(+), 49 deletions(-)
>
> diff --git a/drivers/pci/host/pcie-rockchip.c b/drivers/pci/host/pcie-rockchip.c
> index b55037a..9cb84b1 100644
> --- a/drivers/pci/host/pcie-rockchip.c
> +++ b/drivers/pci/host/pcie-rockchip.c
> @@ -210,6 +210,11 @@ struct rockchip_pcie {
> int link_gen;
> struct device *dev;
> struct irq_domain *irq_domain;
> + u32 io_size;
> + int offset;
> + phys_addr_t io_bus_addr;
> + u32 mem_size;
> + phys_addr_t mem_bus_addr;
> };
>
> static u32 rockchip_pcie_read(struct rockchip_pcie *rockchip, u32 reg)
> @@ -1149,6 +1154,50 @@ static int rockchip_pcie_prog_ib_atu(struct rockchip_pcie *rockchip,
> return 0;
> }
>
> +static int rockchip_cfg_atu(struct rockchip_pcie *rockchip)
> +{
> + int offset;
> + int err;
> + int reg_no;
> +
> + for (reg_no = 0; reg_no < (rockchip->mem_size >> 20); reg_no++) {
> + err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
> + AXI_WRAPPER_MEM_WRITE,
> + 20 - 1,
> + rockchip->mem_bus_addr +
> + (reg_no << 20),
> + 0);
> + if (err) {
> + dev_err(rockchip->dev,
> + "program RC mem outbound ATU failed\n");
> + return err;
> + }
> + }
> +
> + err = rockchip_pcie_prog_ib_atu(rockchip, 2, 32 - 1, 0x0, 0);
> + if (err) {
> + dev_err(rockchip->dev, "program RC mem inbound ATU failed\n");
> + return err;
> + }
> +
> + offset = rockchip->mem_size >> 20;
> + for (reg_no = 0; reg_no < (rockchip->io_size >> 20); reg_no++) {
> + err = rockchip_pcie_prog_ob_atu(rockchip,
> + reg_no + 1 + offset,
> + AXI_WRAPPER_IO_WRITE,
> + 20 - 1,
> + rockchip->io_bus_addr +
> + (reg_no << 20),
> + 0);
> + if (err) {
> + dev_err(rockchip->dev,
> + "program RC io outbound ATU failed\n");
> + return err;
> + }
> + }
> +
> + return err;
> +}
> static int rockchip_pcie_probe(struct platform_device *pdev)
> {
> struct rockchip_pcie *rockchip;
> @@ -1158,13 +1207,7 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
> resource_size_t io_base;
> struct resource *mem;
> struct resource *io;
> - phys_addr_t io_bus_addr = 0;
> - u32 io_size;
> - phys_addr_t mem_bus_addr = 0;
> - u32 mem_size = 0;
> - int reg_no;
> int err;
> - int offset;
>
> LIST_HEAD(res);
>
> @@ -1231,14 +1274,13 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
> goto err_vpcie;
>
> /* Get the I/O and memory ranges from DT */
> - io_size = 0;
> resource_list_for_each_entry(win, &res) {
> switch (resource_type(win->res)) {
> case IORESOURCE_IO:
> io = win->res;
> io->name = "I/O";
> - io_size = resource_size(io);
> - io_bus_addr = io->start - win->offset;
> + rockchip->io_size = resource_size(io);
> + rockchip->io_bus_addr = io->start - win->offset;
> err = pci_remap_iospace(io, io_base);
> if (err) {
> dev_warn(dev, "error %d: failed to map resource %pR\n",
> @@ -1249,8 +1291,8 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
> case IORESOURCE_MEM:
> mem = win->res;
> mem->name = "MEM";
> - mem_size = resource_size(mem);
> - mem_bus_addr = mem->start - win->offset;
> + rockchip->mem_size = resource_size(mem);
> + rockchip->mem_bus_addr = mem->start - win->offset;
> break;
> case IORESOURCE_BUS:
> rockchip->root_bus_nr = win->res->start;
> @@ -1260,45 +1302,9 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
> }
> }
>
> - if (mem_size) {
> - for (reg_no = 0; reg_no < (mem_size >> 20); reg_no++) {
> - err = rockchip_pcie_prog_ob_atu(rockchip, reg_no + 1,
> - AXI_WRAPPER_MEM_WRITE,
> - 20 - 1,
> - mem_bus_addr +
> - (reg_no << 20),
> - 0);
> - if (err) {
> - dev_err(dev, "program RC mem outbound ATU failed\n");
> - goto err_vpcie;
> - }
> - }
> - }
> -
> - err = rockchip_pcie_prog_ib_atu(rockchip, 2, 32 - 1, 0x0, 0);
> - if (err) {
> - dev_err(dev, "program RC mem inbound ATU failed\n");
> + err = rockchip_cfg_atu(rockchip);
> + if (err)
> goto err_vpcie;
> - }
> -
> - offset = mem_size >> 20;
> -
> - if (io_size) {
> - for (reg_no = 0; reg_no < (io_size >> 20); reg_no++) {
> - err = rockchip_pcie_prog_ob_atu(rockchip,
> - reg_no + 1 + offset,
> - AXI_WRAPPER_IO_WRITE,
> - 20 - 1,
> - io_bus_addr +
> - (reg_no << 20),
> - 0);
> - if (err) {
> - dev_err(dev, "program RC io outbound ATU failed\n");
> - goto err_vpcie;
> - }
> - }
> - }
> -
> bus = pci_scan_root_bus(&pdev->dev, 0, &rockchip_pcie_ops, rockchip, &res);
> if (!bus) {
> err = -ENOMEM;
> --
> 1.9.1
>
>
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