drm/amdgpu/discovery: add ip discovery initial support

The IP discovery table lists is populated by the psp at power on
and includes all of the hw details on the board:
- List of IPs and MMIO offsets
- IP harvest details
- IP configuration details

v2: prefix struct and function names with 'amdgpu'
v3: read table binary from vram using mmMM_INDEX and mmMM_DATA
    update TABLE_BINARY_MAX_SIZE to 64kb (1 TMR)
    add 'instance_number' field per ip info
    consider endianness and replace uint8/16/32_t with u8/16/32
    initialize register base addresses
    initialize adev->gfx.config and adev->gfx.cu_info to replace gpu info fw
    get major and minor version using a single api
    don't expose internal data structures in amdgpu_discovery.h
v4: RCC_CONFIG_MEMSIZE is in MB units
    hold mmio_idx_lock while reading ip discovery binary
v5: pick out discovery.h as a cross-OS header
    do structure pointer cast directly
    consider endianness while using the member of structure
    convert base addresses to dword

at boot up, PSP BL copies ip discovery binary from VBIOS(SPIROM) image to the
top of the frame buffer (just below the reserved regions for PSP & SMU).

ip discovery data table includes the collection of each ip's identification
number, base addresses, version number, and harvest setting placeholder.

gc data table includes gfx info structure.

Signed-off-by: Xiaojie Yuan <xiaojie.yuan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 401 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
new file mode 100644
index 000000000000..7b58273e2ed5
--- /dev/null
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
@@ -0,0 +1,401 @@
+/*
+ * Copyright 2018 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+
+#include "amdgpu.h"
+#include "amdgpu_discovery.h"
+#include "soc15_common.h"
+#include "soc15_hw_ip.h"
+#include "nbio/nbio_2_3_offset.h"
+#include "discovery.h"
+
+#define mmMM_INDEX	0x0
+#define mmMM_INDEX_HI	0x6
+#define mmMM_DATA	0x1
+#define HW_ID_MAX	300
+
+const char *hw_id_names[HW_ID_MAX] = {
+	[MP1_HWID]		= "MP1",
+	[MP2_HWID]		= "MP2",
+	[THM_HWID]		= "THM",
+	[SMUIO_HWID]		= "SMUIO",
+	[FUSE_HWID]		= "FUSE",
+	[CLKA_HWID]		= "CLKA",
+	[PWR_HWID]		= "PWR",
+	[GC_HWID]		= "GC",
+	[UVD_HWID]		= "UVD",
+	[AUDIO_AZ_HWID]		= "AUDIO_AZ",
+	[ACP_HWID]		= "ACP",
+	[DCI_HWID]		= "DCI",
+	[DMU_HWID]		= "DMU",
+	[DCO_HWID]		= "DCO",
+	[DIO_HWID]		= "DIO",
+	[XDMA_HWID]		= "XDMA",
+	[DCEAZ_HWID]		= "DCEAZ",
+	[DAZ_HWID]		= "DAZ",
+	[SDPMUX_HWID]		= "SDPMUX",
+	[NTB_HWID]		= "NTB",
+	[IOHC_HWID]		= "IOHC",
+	[L2IMU_HWID]		= "L2IMU",
+	[VCE_HWID]		= "VCE",
+	[MMHUB_HWID]		= "MMHUB",
+	[ATHUB_HWID]		= "ATHUB",
+	[DBGU_NBIO_HWID]	= "DBGU_NBIO",
+	[DFX_HWID]		= "DFX",
+	[DBGU0_HWID]		= "DBGU0",
+	[DBGU1_HWID]		= "DBGU1",
+	[OSSSYS_HWID]		= "OSSSYS",
+	[HDP_HWID]		= "HDP",
+	[SDMA0_HWID]		= "SDMA0",
+	[SDMA1_HWID]		= "SDMA1",
+	[ISP_HWID]		= "ISP",
+	[DBGU_IO_HWID]		= "DBGU_IO",
+	[DF_HWID]		= "DF",
+	[CLKB_HWID]		= "CLKB",
+	[FCH_HWID]		= "FCH",
+	[DFX_DAP_HWID]		= "DFX_DAP",
+	[L1IMU_PCIE_HWID]	= "L1IMU_PCIE",
+	[L1IMU_NBIF_HWID]	= "L1IMU_NBIF",
+	[L1IMU_IOAGR_HWID]	= "L1IMU_IOAGR",
+	[L1IMU3_HWID]		= "L1IMU3",
+	[L1IMU4_HWID]		= "L1IMU4",
+	[L1IMU5_HWID]		= "L1IMU5",
+	[L1IMU6_HWID]		= "L1IMU6",
+	[L1IMU7_HWID]		= "L1IMU7",
+	[L1IMU8_HWID]		= "L1IMU8",
+	[L1IMU9_HWID]		= "L1IMU9",
+	[L1IMU10_HWID]		= "L1IMU10",
+	[L1IMU11_HWID]		= "L1IMU11",
+	[L1IMU12_HWID]		= "L1IMU12",
+	[L1IMU13_HWID]		= "L1IMU13",
+	[L1IMU14_HWID]		= "L1IMU14",
+	[L1IMU15_HWID]		= "L1IMU15",
+	[WAFLC_HWID]		= "WAFLC",
+	[FCH_USB_PD_HWID]	= "FCH_USB_PD",
+	[PCIE_HWID]		= "PCIE",
+	[PCS_HWID]		= "PCS",
+	[DDCL_HWID]		= "DDCL",
+	[SST_HWID]		= "SST",
+	[IOAGR_HWID]		= "IOAGR",
+	[NBIF_HWID]		= "NBIF",
+	[IOAPIC_HWID]		= "IOAPIC",
+	[SYSTEMHUB_HWID]	= "SYSTEMHUB",
+	[NTBCCP_HWID]		= "NTBCCP",
+	[UMC_HWID]		= "UMC",
+	[SATA_HWID]		= "SATA",
+	[USB_HWID]		= "USB",
+	[CCXSEC_HWID]		= "CCXSEC",
+	[XGMI_HWID]		= "XGMI",
+	[XGBE_HWID]		= "XGBE",
+	[MP0_HWID]		= "MP0",
+};
+
+static int hw_id_map[MAX_HWIP] = {
+	[GC_HWIP]	= GC_HWID,
+	[HDP_HWIP]	= HDP_HWID,
+	[SDMA0_HWIP]	= SDMA0_HWID,
+	[SDMA1_HWIP]	= SDMA1_HWID,
+	[MMHUB_HWIP]	= MMHUB_HWID,
+	[ATHUB_HWIP]	= ATHUB_HWID,
+	[NBIO_HWIP]	= DBGU_NBIO_HWID,
+	[MP0_HWIP]	= MP0_HWID,
+	[MP1_HWIP]	= MP1_HWID,
+	[UVD_HWIP]	= UVD_HWID,
+	[VCE_HWIP]	= VCE_HWID,
+	[DF_HWIP]	= DF_HWID,
+	[DCE_HWIP]	= DCEAZ_HWID,
+	[OSSSYS_HWIP]	= OSSSYS_HWID,
+	[SMUIO_HWIP]	= SMUIO_HWID,
+	[PWR_HWIP]	= PWR_HWID,
+	[NBIF_HWIP]	= NBIF_HWID,
+	[THM_HWIP]	= THM_HWID,
+	[CLK_HWIP]	= CLKA_HWID,
+};
+
+static int amdgpu_discovery_read_binary(struct amdgpu_device *adev, uint8_t *binary)
+{
+	uint32_t *p = (uint32_t *)binary;
+	uint64_t vram_size = RREG32_SOC15(NBIO, 0,
+			mmRCC_DEV0_EPF0_RCC_CONFIG_MEMSIZE) * 1024 * 1024;
+	uint64_t pos = vram_size - BINARY_MAX_SIZE;
+	unsigned long flags;
+
+	while (pos < vram_size) {
+		spin_lock_irqsave(&adev->mmio_idx_lock, flags);
+		WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)pos) | 0x80000000);
+		WREG32_NO_KIQ(mmMM_INDEX_HI, pos >> 31);
+		*p++ = RREG32_NO_KIQ(mmMM_DATA);
+		spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
+		pos += 4;
+	}
+
+	return 0;
+}
+
+static uint16_t amdgpu_discovery_calculate_checksum(uint8_t *data, uint32_t size)
+{
+	uint16_t checksum = 0;
+	int i;
+
+	for (i = 0; i < size; i++)
+		checksum += data[i];
+
+	return checksum;
+}
+
+static inline bool amdgpu_discovery_verify_checksum(uint8_t *data, uint32_t size,
+						    uint16_t expected)
+{
+	return !!(amdgpu_discovery_calculate_checksum(data, size) == expected);
+}
+
+int amdgpu_discovery_init(struct amdgpu_device *adev)
+{
+	struct table_info *info;
+	struct binary_header *bhdr;
+	struct ip_discovery_header *ihdr;
+	struct gpu_info_header *ghdr;
+	uint16_t offset;
+	uint16_t size;
+	uint16_t checksum;
+	int r;
+
+	adev->discovery = kzalloc(BINARY_MAX_SIZE, GFP_KERNEL);
+	if (!adev->discovery)
+		return -ENOMEM;
+
+	r = amdgpu_discovery_read_binary(adev, adev->discovery);
+	if (r) {
+		DRM_ERROR("failed to read ip discovery binary\n");
+		goto out;
+	}
+
+	bhdr = (struct binary_header *)(adev->discovery + PSP_HEADER_SIZE);
+
+	if (le32_to_cpu(bhdr->binary_signature) != BINARY_SIGNATURE) {
+		DRM_ERROR("invalid ip discovery binary signature\n");
+		r = -EINVAL;
+		goto out;
+	}
+
+	offset = PSP_HEADER_SIZE +
+		offsetof(struct binary_header, binary_checksum) +
+		sizeof(bhdr->binary_checksum);
+	size = bhdr->binary_size - offset;
+	checksum = bhdr->binary_checksum;
+
+	if (!amdgpu_discovery_verify_checksum(adev->discovery + offset,
+					      size, checksum)) {
+		DRM_ERROR("invalid ip discovery binary checksum\n");
+		r = -EINVAL;
+		goto out;
+	}
+
+	info = &bhdr->table_list[IP_DISCOVERY];
+	offset = le16_to_cpu(info->offset);
+	checksum = le16_to_cpu(info->checksum);
+	ihdr = (struct ip_discovery_header *)(adev->discovery + offset);
+
+	if (le32_to_cpu(ihdr->signature) != DISCOVERY_TABLE_SIGNATURE) {
+		DRM_ERROR("invalid ip discovery data table signature\n");
+		r = -EINVAL;
+		goto out;
+	}
+
+	if (!amdgpu_discovery_verify_checksum(adev->discovery + offset,
+					      ihdr->size, checksum)) {
+		DRM_ERROR("invalid ip discovery data table checksum\n");
+		r = -EINVAL;
+		goto out;
+	}
+
+	info = &bhdr->table_list[GC];
+	offset = le16_to_cpu(info->offset);
+	checksum = le16_to_cpu(info->checksum);
+	ghdr = (struct gpu_info_header *)(adev->discovery + offset);
+
+	if (!amdgpu_discovery_verify_checksum(adev->discovery + offset,
+				              ghdr->size, checksum)) {
+		DRM_ERROR("invalid gc data table checksum\n");
+		r = -EINVAL;
+		goto out;
+	}
+
+	return 0;
+
+out:
+	kfree(adev->discovery);
+	adev->discovery = NULL;
+
+	return r;
+}
+
+void amdgpu_discovery_fini(struct amdgpu_device *adev)
+{
+	kfree(adev->discovery);
+	adev->discovery = NULL;
+}
+
+int amdgpu_discovery_reg_base_init(struct amdgpu_device *adev)
+{
+	struct binary_header *bhdr;
+	struct ip_discovery_header *ihdr;
+	struct die_header *dhdr;
+	struct ip *ip;
+	uint16_t die_offset;
+	uint16_t ip_offset;
+	uint16_t num_dies;
+	uint16_t num_ips;
+	uint8_t num_base_address;
+	int hw_ip;
+	int hw_id;
+	int i, j, k;
+
+	if (!adev->discovery) {
+		DRM_ERROR("ip discovery uninitialized\n");
+		return -EINVAL;
+	}
+
+	bhdr = (struct binary_header *)(adev->discovery + PSP_HEADER_SIZE);
+	ihdr = (struct ip_discovery_header *)(adev->discovery +
+			le16_to_cpu(bhdr->table_list[IP_DISCOVERY].offset));
+	num_dies = le16_to_cpu(ihdr->num_dies);
+
+	for (hw_ip = 0; hw_ip < MAX_HWIP; hw_ip++) {
+		hw_id = hw_id_map[hw_ip];
+
+		for (i = 0; i < num_dies; i++) {
+			die_offset = le16_to_cpu(ihdr->die_info[i].die_offset);
+			dhdr = (struct die_header *)(adev->discovery + die_offset);
+			num_ips = le16_to_cpu(dhdr->num_ips);
+			ip_offset = die_offset + sizeof(*dhdr);
+
+			for (j = 0; j < num_ips; j++) {
+				ip = (struct ip *)(adev->discovery + ip_offset);
+				num_base_address = ip->num_base_address;
+
+				if (le16_to_cpu(ip->hw_id) == hw_id) {
+					DRM_DEBUG("%s(%d) v%d.%d.%d:\n",
+						  hw_id_names[hw_id], hw_id,
+						  ip->major, ip->minor,
+						  ip->revision);
+
+					for (k = 0; k < num_base_address; k++) {
+						/*
+						 * convert the endianness and unit (in dword) of base addresses in place,
+						 * so that we don't need to convert them when accessing adev->reg_offset.
+						 */
+						ip->base_address[k] = le32_to_cpu(ip->base_address[k]) >> 2;
+						DRM_DEBUG("\t0x%08x\n", ip->base_address[k] << 2);
+					}
+
+					adev->reg_offset[hw_ip][ip->number_instance] =
+						ip->base_address;
+				}
+
+				ip_offset += sizeof(*ip) + 4 * (ip->num_base_address - 1);
+			}
+		}
+	}
+
+	return 0;
+}
+
+int amdgpu_discovery_get_ip_version(struct amdgpu_device *adev, int hw_id,
+				    int *major, int *minor)
+{
+	struct binary_header *bhdr;
+	struct ip_discovery_header *ihdr;
+	struct die_header *dhdr;
+	struct ip *ip;
+	uint16_t die_offset;
+	uint16_t ip_offset;
+	uint16_t num_dies;
+	uint16_t num_ips;
+	int i, j;
+
+	if (!adev->discovery) {
+		DRM_ERROR("ip discovery uninitialized\n");
+		return -EINVAL;
+	}
+
+	bhdr = (struct binary_header *)(adev->discovery + PSP_HEADER_SIZE);
+	ihdr = (struct ip_discovery_header *)(adev->discovery +
+			le16_to_cpu(bhdr->table_list[IP_DISCOVERY].offset));
+	num_dies = le16_to_cpu(ihdr->num_dies);
+
+	for (i = 0; i < num_dies; i++) {
+		die_offset = le16_to_cpu(ihdr->die_info[i].die_offset);
+		dhdr = (struct die_header *)(adev->discovery + die_offset);
+		num_ips = le16_to_cpu(dhdr->num_ips);
+		ip_offset = die_offset + sizeof(*dhdr);
+
+		for (j = 0; j < num_ips; j++) {
+			ip = (struct ip *)(adev->discovery + ip_offset);
+
+			if (le16_to_cpu(ip->hw_id) == hw_id) {
+				if (major)
+					*major = ip->major;
+				if (minor)
+					*minor = ip->minor;
+				return 0;
+			}
+			ip_offset += sizeof(*ip) + 4 * (ip->num_base_address - 1);
+		}
+	}
+
+	return -EINVAL;
+}
+
+int amdgpu_discovery_get_gfx_info(struct amdgpu_device *adev)
+{
+	struct binary_header *bhdr;
+	struct gc_info_v1_0 *gc_info;
+
+	if (!adev->discovery) {
+		DRM_ERROR("ip discovery uninitialized\n");
+		return -EINVAL;
+	}
+
+	bhdr = (struct binary_header *)(adev->discovery + PSP_HEADER_SIZE);
+	gc_info = (struct gc_info_v1_0 *)(adev->discovery +
+			le16_to_cpu(bhdr->table_list[GC].offset));
+
+	adev->gfx.config.max_shader_engines = le32_to_cpu(gc_info->gc_num_se);
+	adev->gfx.config.max_cu_per_sh = le32_to_cpu(gc_info->gc_num_wgp0_per_sa);
+	adev->gfx.config.max_sh_per_se = le32_to_cpu(gc_info->gc_num_wgp1_per_sa);
+	adev->gfx.config.max_backends_per_se = le32_to_cpu(gc_info->gc_num_rb_per_se);
+	adev->gfx.config.max_texture_channel_caches = le32_to_cpu(gc_info->gc_num_gl2c);
+	adev->gfx.config.max_gprs = le32_to_cpu(gc_info->gc_num_gprs);
+	adev->gfx.config.max_gs_threads = le32_to_cpu(gc_info->gc_num_max_gs_thds);
+	adev->gfx.config.gs_vgt_table_depth = le32_to_cpu(gc_info->gc_gs_table_depth);
+	adev->gfx.config.gs_prim_buffer_depth = le32_to_cpu(gc_info->gc_gsprim_buff_depth);
+	adev->gfx.config.double_offchip_lds_buf = le32_to_cpu(gc_info->gc_double_offchip_lds_buffer);
+	adev->gfx.cu_info.wave_front_size = le32_to_cpu(gc_info->gc_wave_size);
+	adev->gfx.cu_info.max_waves_per_simd = le32_to_cpu(gc_info->gc_max_waves_per_simd);
+	adev->gfx.cu_info.max_scratch_slots_per_cu = le32_to_cpu(gc_info->gc_max_scratch_slots_per_cu);
+	adev->gfx.cu_info.lds_size = le32_to_cpu(gc_info->gc_lds_size);
+	adev->gfx.config.num_sc_per_sh = le32_to_cpu(gc_info->gc_num_sc_per_se);
+	adev->gfx.config.num_packer_per_sc = le32_to_cpu(gc_info->gc_num_sa_per_se);
+
+	return 0;
+}