This patch adds support to the Rockchip PCIe controller in endpoint mode
which currently supports up to 32 regions, and each regions should at
least be 1MB per TRM.
Signed-off-by: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
---
Changes in v4: None
Changes in v2:
- fix some error handling
Series-changes: 3
- fix all issues suggested by Lorenzo
drivers/pci/rockchip/Kconfig | 12 +
drivers/pci/rockchip/Makefile | 1 +
drivers/pci/rockchip/pcie-rockchip-ep.c | 638 ++++++++++++++++++++++++++++++++
drivers/pci/rockchip/pcie-rockchip.c | 25 +-
drivers/pci/rockchip/pcie-rockchip.h | 91 +++++
5 files changed, 758 insertions(+), 9 deletions(-)
create mode 100644 drivers/pci/rockchip/pcie-rockchip-ep.c
diff --git a/drivers/pci/rockchip/Kconfig b/drivers/pci/rockchip/Kconfig
index d655b77..668f850 100644
--- a/drivers/pci/rockchip/Kconfig
+++ b/drivers/pci/rockchip/Kconfig
@@ -17,4 +17,16 @@ config PCIE_ROCKCHIP_HOST
There is 1 internal PCIe port available to support GEN2 with
4 slots.
+config PCIE_ROCKCHIP_EP
+ bool "Rockchip PCIe endpoint controller"
+ depends on ARCH_ROCKCHIP || COMPILE_TEST
+ depends on OF
+ depends on PCI_ENDPOINT
+ select MFD_SYSCON
+ select PCIE_ROCKCHIP
+ help
+ Say Y here if you want to support Rockchip PCIe controller in
+ endpoint mode on Rockchip SoC. There is 1 internal PCIe port
+ available to support GEN2 with 4 slots.
+
endmenu
diff --git a/drivers/pci/rockchip/Makefile b/drivers/pci/rockchip/Makefile
index 0af40db..8dce495 100644
--- a/drivers/pci/rockchip/Makefile
+++ b/drivers/pci/rockchip/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0
obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
+obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o
diff --git a/drivers/pci/rockchip/pcie-rockchip-ep.c b/drivers/pci/rockchip/pcie-rockchip-ep.c
new file mode 100644
index 0000000..01997ce
--- /dev/null
+++ b/drivers/pci/rockchip/pcie-rockchip-ep.c
@@ -0,0 +1,638 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Rockchip AXI PCIe endpoint controller driver
+ *
+ * Copyright (c) 2018 Rockchip, Inc.
+ *
+ * Author: Shawn Lin <shawn.lin@xxxxxxxxxxxxxx>
+ * Simon Xue <xxm@xxxxxxxxxxxxxx>
+ */
+
+#include <linux/configfs.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/of.h>
+#include <linux/pci-epc.h>
+#include <linux/platform_device.h>
+#include <linux/pci-epf.h>
+#include <linux/sizes.h>
+
+#include "pcie-rockchip.h"
+
+/**
+ * struct rockchip_pcie_ep - private data for PCIe endpoint controller driver
+ * @rockchip: Rockchip PCIe controller
+ * @max_regions: maximum number of regions supported by hardware
+ * @ob_region_map: bitmask of mapped outbound regions
+ * @ob_addr: base addresses in the AXI bus where the outbound regions start
+ * @irq_phys_addr: base address on the AXI bus where the MSI/legacy IRQ
+ * dedicated outbound regions is mapped.
+ * @irq_cpu_addr: base address in the CPU space where a write access triggers
+ * the sending of a memory write (MSI) / normal message (legacy
+ * IRQ) TLP through the PCIe bus.
+ * @irq_pci_addr: used to save the current mapping of the MSI/legacy IRQ
+ * dedicated outbound region.
+ * @irq_pci_fn: the latest PCI function that has updated the mapping of
+ * the MSI/legacy IRQ dedicated outbound region.
+ * @irq_pending: bitmask of asserted legacy IRQs.
+ */
+struct rockchip_pcie_ep {
+ struct rockchip_pcie rockchip;
+ struct pci_epc *epc;
+ u32 max_regions;
+ unsigned long ob_region_map;
+ phys_addr_t *ob_addr;
+ phys_addr_t irq_phys_addr;
+ void __iomem *irq_cpu_addr;
+ u64 irq_pci_addr;
+ u8 irq_pci_fn;
+ u8 irq_pending;
+};
+
+void rockchip_pcie_clear_ep_ob_atu(struct rockchip_pcie *rockchip, u32 region)
+{
+ rockchip_pcie_write(rockchip, 0,
+ ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0(region));
+ rockchip_pcie_write(rockchip, 0,
+ ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR1(region));
+ rockchip_pcie_write(rockchip, 0,
+ ROCKCHIP_PCIE_AT_OB_REGION_DESC0(region));
+ rockchip_pcie_write(rockchip, 0,
+ ROCKCHIP_PCIE_AT_OB_REGION_DESC1(region));
+ rockchip_pcie_write(rockchip, 0,
+ ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR0(region));
+ rockchip_pcie_write(rockchip, 0,
+ ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(region));
+}
+
+void rockchip_pcie_prog_ep_ob_atu(struct rockchip_pcie *rockchip, u8 fn,
+ u32 r, u32 type, u64 cpu_addr, u64 pci_addr,
+ size_t size)
+{
+ u64 sz = 1ULL << fls64(size - 1);
+ int num_pass_bits = ilog2(sz);
+ u32 addr0, addr1, desc0, desc1;
+ bool is_nor_msg = (type == AXI_WRAPPER_NOR_MSG);
+
+ /* The minimal region size is 1MB */
+ if (num_pass_bits < 8)
+ num_pass_bits = 8;
+
+ cpu_addr -= rockchip->mem_res->start;
+ addr0 = ((is_nor_msg ? 0x10 : (num_pass_bits - 1)) &
+ PCIE_CORE_OB_REGION_ADDR0_NUM_BITS) |
+ (lower_32_bits(cpu_addr) & PCIE_CORE_OB_REGION_ADDR0_LO_ADDR);
+ addr1 = upper_32_bits(is_nor_msg ? cpu_addr : pci_addr);
+ desc0 = ROCKCHIP_PCIE_AT_OB_REGION_DESC0_DEVFN(fn) | type;
+ desc1 = 0;
+
+ if (is_nor_msg) {
+ rockchip_pcie_write(rockchip, 0,
+ ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0(r));
+ rockchip_pcie_write(rockchip, 0,
+ ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR1(r));
+ rockchip_pcie_write(rockchip, desc0,
+ ROCKCHIP_PCIE_AT_OB_REGION_DESC0(r));
+ rockchip_pcie_write(rockchip, desc1,
+ ROCKCHIP_PCIE_AT_OB_REGION_DESC1(r));
+ } else {
+ /* PCI bus address region */
+ rockchip_pcie_write(rockchip, addr0,
+ ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0(r));
+ rockchip_pcie_write(rockchip, addr1,
+ ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR1(r));
+ rockchip_pcie_write(rockchip, desc0,
+ ROCKCHIP_PCIE_AT_OB_REGION_DESC0(r));
+ rockchip_pcie_write(rockchip, desc1,
+ ROCKCHIP_PCIE_AT_OB_REGION_DESC1(r));
+
+ addr0 =
+ ((num_pass_bits - 1) & PCIE_CORE_OB_REGION_ADDR0_NUM_BITS) |
+ (lower_32_bits(cpu_addr) &
+ PCIE_CORE_OB_REGION_ADDR0_LO_ADDR);
+ addr1 = upper_32_bits(cpu_addr);
+ }
+
+ /* CPU bus address region */
+ rockchip_pcie_write(rockchip, addr0,
+ ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR0(r));
+ rockchip_pcie_write(rockchip, addr1,
+ ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(r));
+}
+
+static int rockchip_pcie_ep_write_header(struct pci_epc *epc, u8 fn,
+ struct pci_epf_header *hdr)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+
+ /* All functions share the same vendor ID with function 0 */
+ if (fn == 0) {
+ u32 vid_regs = (hdr->vendorid & GENMASK(15, 0)) |
+ (hdr->subsys_vendor_id & GENMASK(31, 16)) << 16;
+
+ rockchip_pcie_write(rockchip, vid_regs,
+ PCIE_CORE_CONFIG_VENDOR);
+ }
+
+ rockchip_pcie_write(rockchip, hdr->deviceid << 16,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) + PCI_VENDOR_ID);
+
+ rockchip_pcie_write(rockchip,
+ hdr->revid |
+ hdr->progif_code << 8 |
+ hdr->subclass_code << 16 |
+ hdr->baseclass_code << 24,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) + PCI_REVISION_ID);
+ rockchip_pcie_write(rockchip, hdr->cache_line_size,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ PCI_CACHE_LINE_SIZE);
+ rockchip_pcie_write(rockchip, hdr->subsys_id << 16,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ PCI_SUBSYSTEM_VENDOR_ID);
+ rockchip_pcie_write(rockchip, hdr->interrupt_pin << 8,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ PCI_INTERRUPT_LINE);
+
+ return 0;
+}
+
+static int rockchip_pcie_ep_set_bar(struct pci_epc *epc, u8 fn,
+ enum pci_barno bar, dma_addr_t bar_phys,
+ size_t size, int flags)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+ u32 addr0, addr1, reg, cfg, b, aperture, ctrl;
+ u64 sz;
+
+ /* BAR size is 2^(aperture + 7) */
+ sz = max_t(size_t, size, MIN_EP_APERTURE);
+
+ /*
+ * roundup_pow_of_two() returns an unsigned long, which is not suited
+ * for 64bit values.
+ */
+ sz = 1ULL << fls64(sz - 1);
+ aperture = ilog2(sz) - 7; /* 128B -> 0, 256B -> 1, 512B -> 2, ... */
+
+ if ((flags & PCI_BASE_ADDRESS_SPACE) == PCI_BASE_ADDRESS_SPACE_IO) {
+ ctrl = ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_IO_32BITS;
+ } else {
+ bool is_prefetch = !!(flags & PCI_BASE_ADDRESS_MEM_PREFETCH);
+ bool is_64bits = sz > SZ_2G;
+
+ if (is_64bits && (bar & 1))
+ return -EINVAL;
+
+ if (is_64bits && is_prefetch)
+ ctrl =
+ ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_PREFETCH_MEM_64BITS;
+ else if (is_prefetch)
+ ctrl =
+ ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_PREFETCH_MEM_32BITS;
+ else if (is_64bits)
+ ctrl = ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_MEM_64BITS;
+ else
+ ctrl = ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_MEM_32BITS;
+ }
+
+ if (bar < BAR_4) {
+ reg = ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG0(fn);
+ b = bar;
+ } else {
+ reg = ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG1(fn);
+ b = bar - BAR_4;
+ }
+
+ addr0 = lower_32_bits(bar_phys);
+ addr1 = upper_32_bits(bar_phys);
+
+ cfg = rockchip_pcie_read(rockchip, reg);
+ cfg &= ~(ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b) |
+ ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b));
+ cfg |= (ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_APERTURE(b, aperture) |
+ ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL(b, ctrl));
+
+ rockchip_pcie_write(rockchip, cfg, reg);
+ rockchip_pcie_write(rockchip, addr0,
+ ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar));
+ rockchip_pcie_write(rockchip, addr1,
+ ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar));
+
+ return 0;
+}
+
+static void rockchip_pcie_ep_clear_bar(struct pci_epc *epc, u8 fn,
+ enum pci_barno bar)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+ u32 reg, cfg, b, ctrl;
+
+ if (bar < BAR_4) {
+ reg = ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG0(fn);
+ b = bar;
+ } else {
+ reg = ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG1(fn);
+ b = bar - BAR_4;
+ }
+
+ ctrl = ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_DISABLED;
+ cfg = rockchip_pcie_read(rockchip, reg);
+ cfg &= ~(ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b) |
+ ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b));
+ cfg |= ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL(b, ctrl);
+
+ rockchip_pcie_write(rockchip, cfg, reg);
+ rockchip_pcie_write(rockchip, 0x0,
+ ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar));
+ rockchip_pcie_write(rockchip, 0x0,
+ ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar));
+}
+
+static int rockchip_pcie_ep_map_addr(struct pci_epc *epc, u8 fn,
+ phys_addr_t addr, u64 pci_addr,
+ size_t size)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+ struct rockchip_pcie *pcie = &ep->rockchip;
+ u32 r;
+
+ r = find_first_zero_bit(&ep->ob_region_map,
+ sizeof(ep->ob_region_map) * BITS_PER_LONG);
+ /*
+ * Region 0 is reserved for configuration space and shouldn't
+ * be used elsewhere per TRM, so leave it out.
+ */
+ if (r >= ep->max_regions - 1) {
+ dev_err(&epc->dev, "no free outbound region\n");
+ return -EINVAL;
+ }
+
+ rockchip_pcie_prog_ep_ob_atu(pcie, fn, r, AXI_WRAPPER_MEM_WRITE, addr,
+ pci_addr, size);
+
+ set_bit(r, &ep->ob_region_map);
+ ep->ob_addr[r] = addr;
+
+ return 0;
+}
+
+static void rockchip_pcie_ep_unmap_addr(struct pci_epc *epc, u8 fn,
+ phys_addr_t addr)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+ u32 r;
+
+ for (r = 0; r < ep->max_regions - 1; r++)
+ if (ep->ob_addr[r] == addr)
+ break;
+
+ /*
+ * Region 0 is reserved for configuration space and shouldn't
+ * be used elsewhere per TRM, so leave it out.
+ */
+ if (r == ep->max_regions - 1)
+ return;
+
+ rockchip_pcie_clear_ep_ob_atu(rockchip, r);
+
+ ep->ob_addr[r] = 0;
+ clear_bit(r, &ep->ob_region_map);
+}
+
+static int rockchip_pcie_ep_set_msi(struct pci_epc *epc, u8 fn,
+ u8 multi_msg_cap)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+ u16 flags;
+
+ flags = rockchip_pcie_read(rockchip,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_MSI_CTRL_REG);
+ flags &= ~ROCKCHIP_PCIE_EP_MSI_CTRL_MMC_MASK;
+ flags |=
+ ((multi_msg_cap << 1) << ROCKCHIP_PCIE_EP_MSI_CTRL_MMC_OFFSET) |
+ PCI_MSI_FLAGS_64BIT;
+ flags &= ~ROCKCHIP_PCIE_EP_MSI_CTRL_MASK_MSI_CAP;
+ rockchip_pcie_write(rockchip, flags,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_MSI_CTRL_REG);
+ return 0;
+}
+
+static int rockchip_pcie_ep_get_msi(struct pci_epc *epc, u8 fn)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+ u16 flags;
+
+ flags = rockchip_pcie_read(rockchip,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_MSI_CTRL_REG);
+ if (!(flags & ROCKCHIP_PCIE_EP_MSI_CTRL_ME))
+ return -EINVAL;
+
+ return ((flags & ROCKCHIP_PCIE_EP_MSI_CTRL_MME_MASK) >>
+ ROCKCHIP_PCIE_EP_MSI_CTRL_MME_OFFSET);
+}
+
+static void rockchip_pcie_ep_assert_intx(struct rockchip_pcie_ep *ep, u8 fn,
+ u8 intx, bool is_asserted)
+{
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+ u32 r = ep->max_regions - 1;
+ u32 offset;
+ u16 status;
+ u8 msg_code;
+
+ if (unlikely(ep->irq_pci_addr != ROCKCHIP_PCIE_EP_PCI_LEGACY_IRQ_ADDR ||
+ ep->irq_pci_fn != fn)) {
+ rockchip_pcie_prog_ep_ob_atu(rockchip, fn, r,
+ AXI_WRAPPER_NOR_MSG,
+ ep->irq_phys_addr, 0, 0);
+ ep->irq_pci_addr = ROCKCHIP_PCIE_EP_PCI_LEGACY_IRQ_ADDR;
+ ep->irq_pci_fn = fn;
+ }
+
+ intx &= 3;
+ if (is_asserted) {
+ ep->irq_pending |= BIT(intx);
+ msg_code = ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTA + intx;
+ } else {
+ ep->irq_pending &= ~BIT(intx);
+ msg_code = ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTA + intx;
+ }
+
+ status = rockchip_pcie_read(rockchip,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_CMD_STATUS);
+ status &= ROCKCHIP_PCIE_EP_CMD_STATUS_IS;
+
+ if ((status != 0) ^ (ep->irq_pending != 0)) {
+ status ^= ROCKCHIP_PCIE_EP_CMD_STATUS_IS;
+ rockchip_pcie_write(rockchip, status,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_CMD_STATUS);
+ }
+
+ offset =
+ ROCKCHIP_PCIE_MSG_ROUTING(ROCKCHIP_PCIE_MSG_ROUTING_LOCAL_INTX) |
+ ROCKCHIP_PCIE_MSG_CODE(msg_code) | ROCKCHIP_PCIE_MSG_NO_DATA;
+ writel(0, ep->irq_cpu_addr + offset);
+}
+
+static int rockchip_pcie_ep_send_legacy_irq(struct rockchip_pcie_ep *ep, u8 fn,
+ u8 intx)
+{
+ u16 cmd;
+
+ cmd = rockchip_pcie_read(&ep->rockchip,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_CMD_STATUS);
+
+ if (cmd & PCI_COMMAND_INTX_DISABLE)
+ return -EINVAL;
+
+ /*
+ * Should add some delay between toggling INTx per TRM vaguely saying
+ * it depends on some cycles of the AHB bus clock to function it. So
+ * add sufficient 1ms here.
+ */
+ rockchip_pcie_ep_assert_intx(ep, fn, intx, true);
+ mdelay(1);
+ rockchip_pcie_ep_assert_intx(ep, fn, intx, false);
+ return 0;
+}
+
+static int rockchip_pcie_ep_send_msi_irq(struct rockchip_pcie_ep *ep, u8 fn,
+ u8 interrupt_num)
+{
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+ u16 flags, mme, data, data_mask;
+ u8 msi_count;
+ u64 pci_addr, pci_addr_mask = 0xff;
+
+ /* Check MSI enable bit */
+ flags = rockchip_pcie_read(&ep->rockchip,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_MSI_CTRL_REG);
+ if (!(flags & ROCKCHIP_PCIE_EP_MSI_CTRL_ME))
+ return -EINVAL;
+
+ /* Get MSI numbers from MME */
+ mme = ((flags & ROCKCHIP_PCIE_EP_MSI_CTRL_MME_MASK) >>
+ ROCKCHIP_PCIE_EP_MSI_CTRL_MME_OFFSET);
+ msi_count = 1 << mme;
+ if (!interrupt_num || interrupt_num > msi_count)
+ return -EINVAL;
+
+ /* Set MSI private data */
+ data_mask = msi_count - 1;
+ data = rockchip_pcie_read(rockchip,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_MSI_CTRL_REG +
+ PCI_MSI_DATA_64);
+ data = (data & ~data_mask) | ((interrupt_num - 1) & data_mask);
+
+ /* Get MSI PCI address */
+ pci_addr = rockchip_pcie_read(rockchip,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_MSI_CTRL_REG +
+ PCI_MSI_ADDRESS_HI);
+ pci_addr <<= 32;
+ pci_addr |= rockchip_pcie_read(rockchip,
+ ROCKCHIP_PCIE_EP_FUNC_BASE(fn) +
+ ROCKCHIP_PCIE_EP_MSI_CTRL_REG +
+ PCI_MSI_ADDRESS_LO);
+ pci_addr &= GENMASK_ULL(63, 2);
+
+ /* Set the outbound region if needed. */
+ if (unlikely(ep->irq_pci_addr != (pci_addr & ~pci_addr_mask) ||
+ ep->irq_pci_fn != fn)) {
+ rockchip_pcie_prog_ep_ob_atu(rockchip, fn, ep->max_regions - 1,
+ AXI_WRAPPER_MEM_WRITE,
+ ep->irq_phys_addr,
+ pci_addr & ~pci_addr_mask,
+ pci_addr_mask + 1);
+ ep->irq_pci_addr = (pci_addr & ~pci_addr_mask);
+ ep->irq_pci_fn = fn;
+ }
+
+ writew(data, ep->irq_cpu_addr + (pci_addr & pci_addr_mask));
+ return 0;
+}
+
+static int rockchip_pcie_ep_raise_irq(struct pci_epc *epc, u8 fn,
+ enum pci_epc_irq_type type,
+ u8 interrupt_num)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+
+ switch (type) {
+ case PCI_EPC_IRQ_LEGACY:
+ return rockchip_pcie_ep_send_legacy_irq(ep, fn, 0);
+ case PCI_EPC_IRQ_MSI:
+ return rockchip_pcie_ep_send_msi_irq(ep, fn, interrupt_num);
+ default:
+ return -EINVAL;
+ }
+}
+
+static int rockchip_pcie_ep_start(struct pci_epc *epc)
+{
+ struct rockchip_pcie_ep *ep = epc_get_drvdata(epc);
+ struct rockchip_pcie *rockchip = &ep->rockchip;
+ struct pci_epf *epf;
+ u32 cfg;
+
+ cfg = BIT(0);
+ list_for_each_entry(epf, &epc->pci_epf, list)
+ cfg |= BIT(epf->func_no);
+
+ rockchip_pcie_write(rockchip, cfg, PCIE_CORE_PHY_FUNC_CFG);
+
+ list_for_each_entry(epf, &epc->pci_epf, list)
+ pci_epf_linkup(epf);
+
+ return 0;
+}
+
+static const struct pci_epc_ops rockchip_pcie_epc_ops = {
+ .write_header = rockchip_pcie_ep_write_header,
+ .set_bar = rockchip_pcie_ep_set_bar,
+ .clear_bar = rockchip_pcie_ep_clear_bar,
+ .map_addr = rockchip_pcie_ep_map_addr,
+ .unmap_addr = rockchip_pcie_ep_unmap_addr,
+ .set_msi = rockchip_pcie_ep_set_msi,
+ .get_msi = rockchip_pcie_ep_get_msi,
+ .raise_irq = rockchip_pcie_ep_raise_irq,
+ .start = rockchip_pcie_ep_start,
+};
+
+static int rockchip_pcie_parse_ep_dt(struct rockchip_pcie *rockchip,
+ struct rockchip_pcie_ep *ep)
+{
+ struct device *dev = rockchip->dev;
+ int err;
+
+ err = rockchip_pcie_parse_dt(rockchip);
+ if (err)
+ return err;
+
+ err = rockchip_pcie_get_phys(rockchip);
+ if (err)
+ return err;
+
+ err = of_property_read_u32(dev->of_node,
+ "rockchip,max-outbound-regions",
+ &ep->max_regions);
+ if (err < 0 || ep->max_regions > MAX_REGION_LIMIT)
+ ep->max_regions = MAX_REGION_LIMIT;
+
+ err = of_property_read_u8(dev->of_node, "max-functions",
+ &ep->epc->max_functions);
+ if (err < 0)
+ ep->epc->max_functions = 1;
+
+ return 0;
+}
+
+static const struct of_device_id rockchip_pcie_ep_of_match[] = {
+ { .compatible = "rockchip,rk3399-pcie-ep"},
+ {},
+};
+
+static int rockchip_pcie_ep_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct rockchip_pcie_ep *ep;
+ struct rockchip_pcie *rockchip;
+ struct pci_epc *epc;
+ size_t max_regions;
+ int err;
+
+ ep = devm_kzalloc(dev, sizeof(*ep), GFP_KERNEL);
+ if (!ep)
+ return -ENOMEM;
+
+ rockchip = &ep->rockchip;
+ rockchip->is_rc = false;
+ rockchip->dev = dev;
+
+ epc = devm_pci_epc_create(dev, &rockchip_pcie_epc_ops);
+ if (IS_ERR(epc)) {
+ dev_err(dev, "failed to create epc device\n");
+ return PTR_ERR(epc);
+ }
+
+ ep->epc = epc;
+ epc_set_drvdata(epc, ep);
+
+ err = rockchip_pcie_parse_ep_dt(rockchip, ep);
+ if (err)
+ return err;
+
+ err = rockchip_pcie_enable_clocks(rockchip);
+ if (err)
+ return err;
+
+ err = rockchip_pcie_init_port(rockchip);
+ if (err)
+ goto err_disable_clocks;
+
+ /* Establish the link automatically */
+ rockchip_pcie_write(rockchip, PCIE_CLIENT_LINK_TRAIN_ENABLE,
+ PCIE_CLIENT_CONFIG);
+
+ max_regions = ep->max_regions;
+ ep->ob_addr = devm_kzalloc(dev, max_regions * sizeof(*ep->ob_addr),
+ GFP_KERNEL);
+
+ if (!ep->ob_addr) {
+ err = -ENOMEM;
+ goto err_uninit_port;
+ }
+
+ /* Only enable function 0 by default */
+ rockchip_pcie_write(rockchip, BIT(0), PCIE_CORE_PHY_FUNC_CFG);
+
+ err = pci_epc_mem_init(epc, rockchip->mem_res->start,
+ resource_size(rockchip->mem_res));
+ if (err < 0) {
+ dev_err(dev, "failed to initialize the memory space\n");
+ goto err_uninit_port;
+ }
+
+ ep->irq_cpu_addr = pci_epc_mem_alloc_addr(epc, &ep->irq_phys_addr,
+ SZ_128K);
+ if (!ep->irq_cpu_addr) {
+ dev_err(dev, "failed to reserve memory space for MSI\n");
+ err = -ENOMEM;
+ goto err_epc_mem_exit;
+ }
+
+ ep->irq_pci_addr = ROCKCHIP_PCIE_EP_DUMMY_IRQ_ADDR;
+
+ return 0;
+err_epc_mem_exit:
+ pci_epc_mem_exit(epc);
+err_uninit_port:
+ rockchip_pcie_deinit_phys(rockchip);
+err_disable_clocks:
+ rockchip_pcie_disable_clocks(rockchip);
+ return err;
+}
+
+static struct platform_driver rockchip_pcie_ep_driver = {
+ .driver = {
+ .name = "rockchip-pcie-ep",
+ .of_match_table = rockchip_pcie_ep_of_match,
+ },
+ .probe = rockchip_pcie_ep_probe,
+};
+
+builtin_platform_driver(rockchip_pcie_ep_driver);
diff --git a/drivers/pci/rockchip/pcie-rockchip.c b/drivers/pci/rockchip/pcie-rockchip.c
index a760b59..9071178 100644
--- a/drivers/pci/rockchip/pcie-rockchip.c
+++ b/drivers/pci/rockchip/pcie-rockchip.c
@@ -29,15 +29,22 @@ int rockchip_pcie_parse_dt(struct rockchip_pcie *rockchip)
struct resource *regs;
int err;
- regs = platform_get_resource_byname(pdev,
- IORESOURCE_MEM,
- "axi-base");
- rockchip->reg_base = devm_pci_remap_cfg_resource(dev, regs);
- if (IS_ERR(rockchip->reg_base))
- return PTR_ERR(rockchip->reg_base);
-
- regs = platform_get_resource_byname(pdev,
- IORESOURCE_MEM,
+ if (rockchip->is_rc) {
+ regs = platform_get_resource_byname(pdev,
+ IORESOURCE_MEM,
+ "axi-base");
+ rockchip->reg_base = devm_pci_remap_cfg_resource(dev, regs);
+ if (IS_ERR(rockchip->reg_base))
+ return PTR_ERR(rockchip->reg_base);
+ } else {
+ rockchip->mem_res =
+ platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ "mem-base");
+ if (!rockchip->mem_res)
+ return -EINVAL;
+ }
+
+ regs = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"apb-base");
rockchip->apb_base = devm_ioremap_resource(dev, regs);
if (IS_ERR(rockchip->apb_base))
diff --git a/drivers/pci/rockchip/pcie-rockchip.h b/drivers/pci/rockchip/pcie-rockchip.h
index ebb89d5..1f5f07c 100644
--- a/drivers/pci/rockchip/pcie-rockchip.h
+++ b/drivers/pci/rockchip/pcie-rockchip.h
@@ -23,6 +23,9 @@
#define ENCODE_LANES(x) ((((x) >> 1) & 3) << 4)
#define MAX_LANE_NUM 4
+#define MAX_REGION_LIMIT 32
+#define MIN_EP_APERTURE 28
+
#define PCIE_CLIENT_BASE 0x0
#define PCIE_CLIENT_CONFIG (PCIE_CLIENT_BASE + 0x00)
@@ -109,7 +112,14 @@
#define PCIE_CORE_INT_MMVC BIT(19)
#define PCIE_CORE_CONFIG_VENDOR (PCIE_CORE_CTRL_MGMT_BASE + 0x44)
#define PCIE_CORE_INT_MASK (PCIE_CORE_CTRL_MGMT_BASE + 0x210)
+#define PCIE_CORE_PHY_FUNC_CFG (PCIE_CORE_CTRL_MGMT_BASE + 0x2c0)
#define PCIE_RC_BAR_CONF (PCIE_CORE_CTRL_MGMT_BASE + 0x300)
+#define ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_DISABLED 0x0
+#define ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_IO_32BITS 0x1
+#define ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_MEM_32BITS 0x4
+#define ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_PREFETCH_MEM_32BITS 0x5
+#define ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_MEM_64BITS 0x6
+#define ROCKCHIP_PCIE_CORE_BAR_CFG_CTRL_PREFETCH_MEM_64BITS 0x7
#define PCIE_CORE_INT \
(PCIE_CORE_INT_PRFPE | PCIE_CORE_INT_CRFPE | \
@@ -120,6 +130,7 @@
PCIE_CORE_INT_CT | PCIE_CORE_INT_UTC | \
PCIE_CORE_INT_MMVC)
+#define PCIE_RC_RP_ATS_BASE 0x400000
#define PCIE_RC_CONFIG_NORMAL_BASE 0x800000
#define PCIE_RC_CONFIG_BASE 0xa00000
#define PCIE_RC_CONFIG_RID_CCR (PCIE_RC_CONFIG_BASE + 0x08)
@@ -188,6 +199,85 @@
#define RC_REGION_0_TYPE_MASK GENMASK(3, 0)
#define MAX_AXI_WRAPPER_REGION_NUM 33
+
+#define ROCKCHIP_PCIE_MSG_ROUTING_TO_RC 0x0
+#define ROCKCHIP_PCIE_MSG_ROUTING_VIA_ADDR 0x1
+#define ROCKCHIP_PCIE_MSG_ROUTING_VIA_ID 0x2
+#define ROCKCHIP_PCIE_MSG_ROUTING_BROADCAST 0x3
+#define ROCKCHIP_PCIE_MSG_ROUTING_LOCAL_INTX 0x4
+#define ROCKCHIP_PCIE_MSG_ROUTING_PME_ACK 0x5
+#define ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTA 0x20
+#define ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTB 0x21
+#define ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTC 0x22
+#define ROCKCHIP_PCIE_MSG_CODE_ASSERT_INTD 0x23
+#define ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTA 0x24
+#define ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTB 0x25
+#define ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTC 0x26
+#define ROCKCHIP_PCIE_MSG_CODE_DEASSERT_INTD 0x27
+#define ROCKCHIP_PCIE_MSG_ROUTING_MASK GENMASK(7, 5)
+#define ROCKCHIP_PCIE_MSG_ROUTING(route) \
+ (((route) << 5) & ROCKCHIP_PCIE_MSG_ROUTING_MASK)
+#define ROCKCHIP_PCIE_MSG_CODE_MASK GENMASK(15, 8)
+#define ROCKCHIP_PCIE_MSG_CODE(code) \
+ (((code) << 8) & ROCKCHIP_PCIE_MSG_CODE_MASK)
+#define ROCKCHIP_PCIE_MSG_NO_DATA BIT(16)
+
+
+#define ROCKCHIP_PCIE_EP_CMD_STATUS 0x4
+#define ROCKCHIP_PCIE_EP_CMD_STATUS_IS BIT(19)
+#define ROCKCHIP_PCIE_EP_MSI_CTRL_REG 0x90
+#define ROCKCHIP_PCIE_EP_MSI_CTRL_MMC_OFFSET 17
+#define ROCKCHIP_PCIE_EP_MSI_CTRL_MMC_MASK GENMASK(19, 17)
+#define ROCKCHIP_PCIE_EP_MSI_CTRL_MME_OFFSET 20
+#define ROCKCHIP_PCIE_EP_MSI_CTRL_MME_MASK GENMASK(22, 20)
+#define ROCKCHIP_PCIE_EP_MSI_CTRL_ME BIT(16)
+#define ROCKCHIP_PCIE_EP_MSI_CTRL_MASK_MSI_CAP BIT(24)
+#define ROCKCHIP_PCIE_EP_DUMMY_IRQ_ADDR 0x1
+#define ROCKCHIP_PCIE_EP_PCI_LEGACY_IRQ_ADDR 0x3
+#define ROCKCHIP_PCIE_EP_FUNC_BASE(fn) (((fn) << 12) & GENMASK(19, 12))
+#define ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR0(fn, bar) \
+ (PCIE_RC_RP_ATS_BASE + 0x0840 + (fn) * 0x0040 + (bar) * 0x0008)
+#define ROCKCHIP_PCIE_AT_IB_EP_FUNC_BAR_ADDR1(fn, bar) \
+ (PCIE_RC_RP_ATS_BASE + 0x0844 + (fn) * 0x0040 + (bar) * 0x0008)
+#define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0(r) \
+ (PCIE_RC_RP_ATS_BASE + 0x0000 + ((r) & 0x1f) * 0x0020)
+#define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK GENMASK(19, 12)
+#define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN(devfn) \
+ (((devfn) << 12) & \
+ ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_DEVFN_MASK)
+#define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK GENMASK(27, 20)
+#define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_BUS(bus) \
+ (((bus) << 20) & ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR0_BUS_MASK)
+#define ROCKCHIP_PCIE_AT_OB_REGION_PCI_ADDR1(r) \
+ (PCIE_RC_RP_ATS_BASE + 0x0004 + ((r) & 0x1f) * 0x0020)
+#define ROCKCHIP_PCIE_AT_OB_REGION_DESC0_HARDCODED_RID BIT(23)
+#define ROCKCHIP_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK GENMASK(31, 24)
+#define ROCKCHIP_PCIE_AT_OB_REGION_DESC0_DEVFN(devfn) \
+ (((devfn) << 24) & ROCKCHIP_PCIE_AT_OB_REGION_DESC0_DEVFN_MASK)
+#define ROCKCHIP_PCIE_AT_OB_REGION_DESC0(r) \
+ (PCIE_RC_RP_ATS_BASE + 0x0008 + ((r) & 0x1f) * 0x0020)
+#define ROCKCHIP_PCIE_AT_OB_REGION_DESC1(r) \
+ (PCIE_RC_RP_ATS_BASE + 0x000c + ((r) & 0x1f) * 0x0020)
+#define ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR0(r) \
+ (PCIE_RC_RP_ATS_BASE + 0x0018 + ((r) & 0x1f) * 0x0020)
+#define ROCKCHIP_PCIE_AT_OB_REGION_CPU_ADDR1(r) \
+ (PCIE_RC_RP_ATS_BASE + 0x001c + ((r) & 0x1f) * 0x0020)
+
+#define ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG0(fn) \
+ (PCIE_CORE_CTRL_MGMT_BASE + 0x0240 + (fn) * 0x0008)
+#define ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG1(fn) \
+ (PCIE_CORE_CTRL_MGMT_BASE + 0x0244 + (fn) * 0x0008)
+#define ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b) \
+ (GENMASK(4, 0) << ((b) * 8))
+#define ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_APERTURE(b, a) \
+ (((a) << ((b) * 8)) & \
+ ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_APERTURE_MASK(b))
+#define ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b) \
+ (GENMASK(7, 5) << ((b) * 8))
+#define ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL(b, c) \
+ (((c) << ((b) * 8 + 5)) & \
+ ROCKCHIP_PCIE_CORE_EP_FUNC_BAR_CFG_BAR_CTRL_MASK(b))
+
struct rockchip_pcie {
void __iomem *reg_base; /* DT axi-base */
void __iomem *apb_base; /* DT apb-base */
@@ -225,6 +315,7 @@ struct rockchip_pcie {
phys_addr_t msg_bus_addr;
phys_addr_t mem_bus_addr;
bool is_rc;
+ struct resource *mem_res;
};
static u32 rockchip_pcie_read(struct rockchip_pcie *rockchip, u32 reg)
--
1.9.1
--
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