From b5c2ca0372dcf5bb7403032ca609c9df1fb23bfc Mon Sep 17 00:00:00 2001 From: Himal Prasad Ghimiray Date: Mon, 8 Apr 2024 22:35:40 +0530 Subject: drm/xe/xe2hpg: Determine flat ccs offset for vram on Xe2 dgfx platform determine the offset using Flat CCS size bitfield of XE2_FLAT_CCS_BASE_RANGE_[UPPER/LOWER] mcr registers. v2: function argument tile_size changed from pass by reference to pass by value Bspec: 68023 Signed-off-by: Himal Prasad Ghimiray Signed-off-by: Akshata Jahagirdar Signed-off-by: Matthew Auld Signed-off-by: Balasubramani Vivekanandan Reviewed-by: Matt Roper Signed-off-by: Matt Roper Link: https://patchwork.freedesktop.org/patch/msgid/20240408170545.3769566-7-balasubramani.vivekanandan@intel.com --- drivers/gpu/drm/xe/regs/xe_gt_regs.h | 5 +++++ drivers/gpu/drm/xe/xe_mmio.c | 39 ++++++++++++++++++++++++++++++++++-- 2 files changed, 42 insertions(+), 2 deletions(-) (limited to 'drivers/gpu') diff --git a/drivers/gpu/drm/xe/regs/xe_gt_regs.h b/drivers/gpu/drm/xe/regs/xe_gt_regs.h index 6617c86a096b..d404f211bc36 100644 --- a/drivers/gpu/drm/xe/regs/xe_gt_regs.h +++ b/drivers/gpu/drm/xe/regs/xe_gt_regs.h @@ -69,6 +69,7 @@ #define XEHP_TILE_ADDR_RANGE(_idx) XE_REG_MCR(0x4900 + (_idx) * 4) #define XEHP_FLAT_CCS_BASE_ADDR XE_REG_MCR(0x4910) +#define XEHP_FLAT_CCS_PTR REG_GENMASK(31, 8) #define WM_CHICKEN3 XE_REG_MCR(0x5588, XE_REG_OPTION_MASKED) #define HIZ_PLANE_COMPRESSION_DIS REG_BIT(10) @@ -142,6 +143,10 @@ #define XE2_FLAT_CCS_BASE_RANGE_LOWER XE_REG_MCR(0x8800) #define XE2_FLAT_CCS_ENABLE REG_BIT(0) +#define XE2_FLAT_CCS_BASE_LOWER_ADDR_MASK REG_GENMASK(31, 6) + +#define XE2_FLAT_CCS_BASE_RANGE_UPPER XE_REG_MCR(0x8804) +#define XE2_FLAT_CCS_BASE_UPPER_ADDR_MASK REG_GENMASK(7, 0) #define GSCPSMI_BASE XE_REG(0x880c) diff --git a/drivers/gpu/drm/xe/xe_mmio.c b/drivers/gpu/drm/xe/xe_mmio.c index 5d13fc7cb9d2..d66da1a9f165 100644 --- a/drivers/gpu/drm/xe/xe_mmio.c +++ b/drivers/gpu/drm/xe/xe_mmio.c @@ -163,6 +163,42 @@ static int xe_determine_lmem_bar_size(struct xe_device *xe) return 0; } +static inline u64 get_flat_ccs_offset(struct xe_gt *gt, u64 tile_size) +{ + struct xe_device *xe = gt_to_xe(gt); + u64 offset; + u32 reg; + + if (GRAPHICS_VER(xe) >= 20) { + u64 ccs_size = tile_size / 512; + u64 offset_hi, offset_lo; + u32 nodes, num_enabled; + + reg = xe_mmio_read32(gt, MIRROR_FUSE3); + nodes = REG_FIELD_GET(XE2_NODE_ENABLE_MASK, reg); + num_enabled = hweight32(nodes); /* Number of enabled l3 nodes */ + + reg = xe_gt_mcr_unicast_read_any(gt, XE2_FLAT_CCS_BASE_RANGE_LOWER); + offset_lo = REG_FIELD_GET(XE2_FLAT_CCS_BASE_LOWER_ADDR_MASK, reg); + + reg = xe_gt_mcr_unicast_read_any(gt, XE2_FLAT_CCS_BASE_RANGE_UPPER); + offset_hi = REG_FIELD_GET(XE2_FLAT_CCS_BASE_UPPER_ADDR_MASK, reg); + + offset = offset_hi << 32; /* HW view bits 39:32 */ + offset |= offset_lo << 6; /* HW view bits 31:6 */ + offset *= num_enabled; /* convert to SW view */ + + /* We don't expect any holes */ + xe_assert_msg(xe, offset == (xe_mmio_read64_2x32(gt, GSMBASE) - ccs_size), + "Hole between CCS and GSM.\n"); + } else { + reg = xe_gt_mcr_unicast_read_any(gt, XEHP_FLAT_CCS_BASE_ADDR); + offset = (u64)REG_FIELD_GET(XEHP_FLAT_CCS_PTR, reg) * SZ_64K; + } + + return offset; +} + /** * xe_mmio_tile_vram_size() - Collect vram size and offset information * @tile: tile to get info for @@ -207,8 +243,7 @@ static int xe_mmio_tile_vram_size(struct xe_tile *tile, u64 *vram_size, /* minus device usage */ if (xe->info.has_flat_ccs) { - reg = xe_gt_mcr_unicast_read_any(gt, XEHP_FLAT_CCS_BASE_ADDR); - offset = (u64)REG_FIELD_GET(GENMASK(31, 8), reg) * SZ_64K; + offset = get_flat_ccs_offset(gt, *tile_size); } else { offset = xe_mmio_read64_2x32(gt, GSMBASE); } -- cgit v1.2.3