* - TESTING, TESTING, TESTING
*/
+/* Initialization path:
+ * We expect that acceleration initialization might fail for various
+ * reasons even thought we work hard to make it works on most
+ * configurations. In order to still have a working userspace in such
+ * situation the init path must succeed up to the memory controller
+ * initialization point. Failure before this point are considered as
+ * fatal error. Here is the init callchain :
+ * radeon_device_init perform common structure, mutex initialization
+ * asic_init setup the GPU memory layout and perform all
+ * one time initialization (failure in this
+ * function are considered fatal)
+ * asic_startup setup the GPU acceleration, in order to
+ * follow guideline the first thing this
+ * function should do is setting the GPU
+ * memory controller (only MC setup failure
+ * are considered as fatal)
+ */
+
#include <asm/atomic.h>
#include <linux/wait.h>
#include <linux/list.h>
#include <linux/kref.h>
+#include "radeon_family.h"
#include "radeon_mode.h"
#include "radeon_reg.h"
-#include "r300.h"
/*
* Modules parameters.
extern int radeon_benchmarking;
extern int radeon_testing;
extern int radeon_connector_table;
+extern int radeon_tv;
/*
* Copy from radeon_drv.h so we don't have to include both and have conflicting
#define RADEON_IB_POOL_SIZE 16
#define RADEON_DEBUGFS_MAX_NUM_FILES 32
#define RADEONFB_CONN_LIMIT 4
-
-enum radeon_family {
- CHIP_R100,
- CHIP_RV100,
- CHIP_RS100,
- CHIP_RV200,
- CHIP_RS200,
- CHIP_R200,
- CHIP_RV250,
- CHIP_RS300,
- CHIP_RV280,
- CHIP_R300,
- CHIP_R350,
- CHIP_RV350,
- CHIP_RV380,
- CHIP_R420,
- CHIP_R423,
- CHIP_RV410,
- CHIP_RS400,
- CHIP_RS480,
- CHIP_RS600,
- CHIP_RS690,
- CHIP_RS740,
- CHIP_RV515,
- CHIP_R520,
- CHIP_RV530,
- CHIP_RV560,
- CHIP_RV570,
- CHIP_R580,
- CHIP_R600,
- CHIP_RV610,
- CHIP_RV630,
- CHIP_RV620,
- CHIP_RV635,
- CHIP_RV670,
- CHIP_RS780,
- CHIP_RV770,
- CHIP_RV730,
- CHIP_RV710,
- CHIP_RS880,
- CHIP_LAST,
-};
-
-enum radeon_chip_flags {
- RADEON_FAMILY_MASK = 0x0000ffffUL,
- RADEON_FLAGS_MASK = 0xffff0000UL,
- RADEON_IS_MOBILITY = 0x00010000UL,
- RADEON_IS_IGP = 0x00020000UL,
- RADEON_SINGLE_CRTC = 0x00040000UL,
- RADEON_IS_AGP = 0x00080000UL,
- RADEON_HAS_HIERZ = 0x00100000UL,
- RADEON_IS_PCIE = 0x00200000UL,
- RADEON_NEW_MEMMAP = 0x00400000UL,
- RADEON_IS_PCI = 0x00800000UL,
- RADEON_IS_IGPGART = 0x01000000UL,
-};
-
+#define RADEON_BIOS_NUM_SCRATCH 8
/*
* Errata workarounds.
*/
bool radeon_get_bios(struct radeon_device *rdev);
+
/*
- * Clocks
+ * Dummy page
*/
+struct radeon_dummy_page {
+ struct page *page;
+ dma_addr_t addr;
+};
+int radeon_dummy_page_init(struct radeon_device *rdev);
+void radeon_dummy_page_fini(struct radeon_device *rdev);
+
+/*
+ * Clocks
+ */
struct radeon_clock {
struct radeon_pll p1pll;
struct radeon_pll p2pll;
uint32_t default_sclk;
};
+
/*
* Fences.
*/
resource_size_t aper_size;
resource_size_t aper_base;
resource_size_t agp_base;
- unsigned gtt_location;
- unsigned gtt_size;
- unsigned vram_location;
/* for some chips with <= 32MB we need to lie
* about vram size near mc fb location */
- unsigned mc_vram_size;
+ u64 mc_vram_size;
+ u64 gtt_location;
+ u64 gtt_size;
+ u64 gtt_start;
+ u64 gtt_end;
+ u64 vram_location;
+ u64 vram_start;
+ u64 vram_end;
unsigned vram_width;
- unsigned real_vram_size;
+ u64 real_vram_size;
int vram_mtrr;
bool vram_is_ddr;
};
unsigned long idx;
uint64_t gpu_addr;
struct radeon_fence *fence;
- volatile uint32_t *ptr;
+ uint32_t *ptr;
uint32_t length_dw;
};
+/*
+ * locking -
+ * mutex protects scheduled_ibs, ready, alloc_bm
+ */
struct radeon_ib_pool {
struct mutex mutex;
struct radeon_object *robj;
bool ready;
};
+struct r600_blit {
+ struct radeon_object *shader_obj;
+ u64 shader_gpu_addr;
+ u32 vs_offset, ps_offset;
+ u32 state_offset;
+ u32 state_len;
+ u32 vb_used, vb_total;
+ struct radeon_ib *vb_ib;
+};
+
int radeon_ib_get(struct radeon_device *rdev, struct radeon_ib **ib);
void radeon_ib_free(struct radeon_device *rdev, struct radeon_ib **ib);
int radeon_ib_schedule(struct radeon_device *rdev, struct radeon_ib *ib);
struct radeon_cs_chunk {
uint32_t chunk_id;
uint32_t length_dw;
+ int kpage_idx[2];
+ uint32_t *kpage[2];
uint32_t *kdata;
+ void __user *user_ptr;
+ int last_copied_page;
+ int last_page_index;
};
struct radeon_cs_parser {
int chunk_relocs_idx;
struct radeon_ib *ib;
void *track;
+ unsigned family;
+ int parser_error;
};
+extern int radeon_cs_update_pages(struct radeon_cs_parser *p, int pg_idx);
+extern int radeon_cs_finish_pages(struct radeon_cs_parser *p);
+
+
+static inline u32 radeon_get_ib_value(struct radeon_cs_parser *p, int idx)
+{
+ struct radeon_cs_chunk *ibc = &p->chunks[p->chunk_ib_idx];
+ u32 pg_idx, pg_offset;
+ u32 idx_value = 0;
+ int new_page;
+
+ pg_idx = (idx * 4) / PAGE_SIZE;
+ pg_offset = (idx * 4) % PAGE_SIZE;
+
+ if (ibc->kpage_idx[0] == pg_idx)
+ return ibc->kpage[0][pg_offset/4];
+ if (ibc->kpage_idx[1] == pg_idx)
+ return ibc->kpage[1][pg_offset/4];
+
+ new_page = radeon_cs_update_pages(p, pg_idx);
+ if (new_page < 0) {
+ p->parser_error = new_page;
+ return 0;
+ }
+
+ idx_value = ibc->kpage[new_page][pg_offset/4];
+ return idx_value;
+}
+
struct radeon_cs_packet {
unsigned idx;
unsigned type;
*/
struct radeon_asic {
int (*init)(struct radeon_device *rdev);
+ void (*fini)(struct radeon_device *rdev);
+ int (*resume)(struct radeon_device *rdev);
+ int (*suspend)(struct radeon_device *rdev);
void (*errata)(struct radeon_device *rdev);
void (*vram_info)(struct radeon_device *rdev);
+ void (*vga_set_state)(struct radeon_device *rdev, bool state);
int (*gpu_reset)(struct radeon_device *rdev);
int (*mc_init)(struct radeon_device *rdev);
void (*mc_fini)(struct radeon_device *rdev);
int (*wb_init)(struct radeon_device *rdev);
void (*wb_fini)(struct radeon_device *rdev);
+ int (*gart_init)(struct radeon_device *rdev);
+ void (*gart_fini)(struct radeon_device *rdev);
int (*gart_enable)(struct radeon_device *rdev);
void (*gart_disable)(struct radeon_device *rdev);
void (*gart_tlb_flush)(struct radeon_device *rdev);
int (*cp_init)(struct radeon_device *rdev, unsigned ring_size);
void (*cp_fini)(struct radeon_device *rdev);
void (*cp_disable)(struct radeon_device *rdev);
+ void (*cp_commit)(struct radeon_device *rdev);
void (*ring_start)(struct radeon_device *rdev);
+ int (*ring_test)(struct radeon_device *rdev);
+ void (*ring_ib_execute)(struct radeon_device *rdev, struct radeon_ib *ib);
+ int (*ib_test)(struct radeon_device *rdev);
int (*irq_set)(struct radeon_device *rdev);
int (*irq_process)(struct radeon_device *rdev);
u32 (*get_vblank_counter)(struct radeon_device *rdev, int crtc);
void (*bandwidth_update)(struct radeon_device *rdev);
};
+/*
+ * Asic structures
+ */
+struct r100_asic {
+ const unsigned *reg_safe_bm;
+ unsigned reg_safe_bm_size;
+};
+
+struct r300_asic {
+ const unsigned *reg_safe_bm;
+ unsigned reg_safe_bm_size;
+};
+
+struct r600_asic {
+ unsigned max_pipes;
+ unsigned max_tile_pipes;
+ unsigned max_simds;
+ unsigned max_backends;
+ unsigned max_gprs;
+ unsigned max_threads;
+ unsigned max_stack_entries;
+ unsigned max_hw_contexts;
+ unsigned max_gs_threads;
+ unsigned sx_max_export_size;
+ unsigned sx_max_export_pos_size;
+ unsigned sx_max_export_smx_size;
+ unsigned sq_num_cf_insts;
+};
+
+struct rv770_asic {
+ unsigned max_pipes;
+ unsigned max_tile_pipes;
+ unsigned max_simds;
+ unsigned max_backends;
+ unsigned max_gprs;
+ unsigned max_threads;
+ unsigned max_stack_entries;
+ unsigned max_hw_contexts;
+ unsigned max_gs_threads;
+ unsigned sx_max_export_size;
+ unsigned sx_max_export_pos_size;
+ unsigned sx_max_export_smx_size;
+ unsigned sq_num_cf_insts;
+ unsigned sx_num_of_sets;
+ unsigned sc_prim_fifo_size;
+ unsigned sc_hiz_tile_fifo_size;
+ unsigned sc_earlyz_tile_fifo_fize;
+};
+
union radeon_asic_config {
struct r300_asic r300;
+ struct r100_asic r100;
+ struct r600_asic r600;
+ struct rv770_asic rv770;
};
typedef void (*radeon_wreg_t)(struct radeon_device*, uint32_t, uint32_t);
struct radeon_device {
+ struct device *dev;
struct drm_device *ddev;
struct pci_dev *pdev;
/* ASIC */
struct radeon_asic *asic;
struct radeon_gem gem;
struct radeon_pm pm;
+ uint32_t bios_scratch[RADEON_BIOS_NUM_SCRATCH];
struct mutex cs_mutex;
struct radeon_wb wb;
+ struct radeon_dummy_page dummy_page;
bool gpu_lockup;
bool shutdown;
bool suspend;
bool need_dma32;
+ bool new_init_path;
+ bool accel_working;
struct radeon_surface_reg surface_regs[RADEON_GEM_MAX_SURFACES];
+ const struct firmware *me_fw; /* all family ME firmware */
+ const struct firmware *pfp_fw; /* r6/700 PFP firmware */
+ struct r600_blit r600_blit;
};
int radeon_device_init(struct radeon_device *rdev,
void radeon_device_fini(struct radeon_device *rdev);
int radeon_gpu_wait_for_idle(struct radeon_device *rdev);
+/* r600 blit */
+int r600_blit_prepare_copy(struct radeon_device *rdev, int size_bytes);
+void r600_blit_done_copy(struct radeon_device *rdev, struct radeon_fence *fence);
+void r600_kms_blit_copy(struct radeon_device *rdev,
+ u64 src_gpu_addr, u64 dst_gpu_addr,
+ int size_bytes);
+
static inline uint32_t r100_mm_rreg(struct radeon_device *rdev, uint32_t reg)
{
if (reg < 0x10000)
#define RREG8(reg) readb(((void __iomem *)rdev->rmmio) + (reg))
#define WREG8(reg, v) writeb(v, ((void __iomem *)rdev->rmmio) + (reg))
#define RREG32(reg) r100_mm_rreg(rdev, (reg))
+#define DREG32(reg) printk(KERN_INFO "REGISTER: " #reg " : 0x%08X\n", r100_mm_rreg(rdev, (reg)))
#define WREG32(reg, v) r100_mm_wreg(rdev, (reg), (v))
#define REG_SET(FIELD, v) (((v) << FIELD##_SHIFT) & FIELD##_MASK)
#define REG_GET(FIELD, v) (((v) << FIELD##_SHIFT) & FIELD##_MASK)
tmp_ |= ((val) & ~(mask)); \
WREG32_PLL(reg, tmp_); \
} while (0)
+#define DREG32_SYS(sqf, rdev, reg) seq_printf((sqf), #reg " : 0x%08X\n", r100_mm_rreg((rdev), (reg)))
/*
* Indirect registers accessor
/*
* RING helpers.
*/
-#define CP_PACKET0 0x00000000
-#define PACKET0_BASE_INDEX_SHIFT 0
-#define PACKET0_BASE_INDEX_MASK (0x1ffff << 0)
-#define PACKET0_COUNT_SHIFT 16
-#define PACKET0_COUNT_MASK (0x3fff << 16)
-#define CP_PACKET1 0x40000000
-#define CP_PACKET2 0x80000000
-#define PACKET2_PAD_SHIFT 0
-#define PACKET2_PAD_MASK (0x3fffffff << 0)
-#define CP_PACKET3 0xC0000000
-#define PACKET3_IT_OPCODE_SHIFT 8
-#define PACKET3_IT_OPCODE_MASK (0xff << 8)
-#define PACKET3_COUNT_SHIFT 16
-#define PACKET3_COUNT_MASK (0x3fff << 16)
-/* PACKET3 op code */
-#define PACKET3_NOP 0x10
-#define PACKET3_3D_DRAW_VBUF 0x28
-#define PACKET3_3D_DRAW_IMMD 0x29
-#define PACKET3_3D_DRAW_INDX 0x2A
-#define PACKET3_3D_LOAD_VBPNTR 0x2F
-#define PACKET3_INDX_BUFFER 0x33
-#define PACKET3_3D_DRAW_VBUF_2 0x34
-#define PACKET3_3D_DRAW_IMMD_2 0x35
-#define PACKET3_3D_DRAW_INDX_2 0x36
-#define PACKET3_BITBLT_MULTI 0x9B
-
-#define PACKET0(reg, n) (CP_PACKET0 | \
- REG_SET(PACKET0_BASE_INDEX, (reg) >> 2) | \
- REG_SET(PACKET0_COUNT, (n)))
-#define PACKET2(v) (CP_PACKET2 | REG_SET(PACKET2_PAD, (v)))
-#define PACKET3(op, n) (CP_PACKET3 | \
- REG_SET(PACKET3_IT_OPCODE, (op)) | \
- REG_SET(PACKET3_COUNT, (n)))
-
-#define PACKET_TYPE0 0
-#define PACKET_TYPE1 1
-#define PACKET_TYPE2 2
-#define PACKET_TYPE3 3
-
-#define CP_PACKET_GET_TYPE(h) (((h) >> 30) & 3)
-#define CP_PACKET_GET_COUNT(h) (((h) >> 16) & 0x3FFF)
-#define CP_PACKET0_GET_REG(h) (((h) & 0x1FFF) << 2)
-#define CP_PACKET0_GET_ONE_REG_WR(h) (((h) >> 15) & 1)
-#define CP_PACKET3_GET_OPCODE(h) (((h) >> 8) & 0xFF)
-
static inline void radeon_ring_write(struct radeon_device *rdev, uint32_t v)
{
#if DRM_DEBUG_CODE
* ASICs macro.
*/
#define radeon_init(rdev) (rdev)->asic->init((rdev))
+#define radeon_fini(rdev) (rdev)->asic->fini((rdev))
+#define radeon_resume(rdev) (rdev)->asic->resume((rdev))
+#define radeon_suspend(rdev) (rdev)->asic->suspend((rdev))
#define radeon_cs_parse(p) rdev->asic->cs_parse((p))
#define radeon_errata(rdev) (rdev)->asic->errata((rdev))
#define radeon_vram_info(rdev) (rdev)->asic->vram_info((rdev))
+#define radeon_vga_set_state(rdev, state) (rdev)->asic->vga_set_state((rdev), (state))
#define radeon_gpu_reset(rdev) (rdev)->asic->gpu_reset((rdev))
#define radeon_mc_init(rdev) (rdev)->asic->mc_init((rdev))
#define radeon_mc_fini(rdev) (rdev)->asic->mc_fini((rdev))
#define radeon_wb_init(rdev) (rdev)->asic->wb_init((rdev))
#define radeon_wb_fini(rdev) (rdev)->asic->wb_fini((rdev))
+#define radeon_gpu_gart_init(rdev) (rdev)->asic->gart_init((rdev))
+#define radeon_gpu_gart_fini(rdev) (rdev)->asic->gart_fini((rdev))
#define radeon_gart_enable(rdev) (rdev)->asic->gart_enable((rdev))
#define radeon_gart_disable(rdev) (rdev)->asic->gart_disable((rdev))
#define radeon_gart_tlb_flush(rdev) (rdev)->asic->gart_tlb_flush((rdev))
#define radeon_cp_init(rdev,rsize) (rdev)->asic->cp_init((rdev), (rsize))
#define radeon_cp_fini(rdev) (rdev)->asic->cp_fini((rdev))
#define radeon_cp_disable(rdev) (rdev)->asic->cp_disable((rdev))
+#define radeon_cp_commit(rdev) (rdev)->asic->cp_commit((rdev))
#define radeon_ring_start(rdev) (rdev)->asic->ring_start((rdev))
+#define radeon_ring_test(rdev) (rdev)->asic->ring_test((rdev))
+#define radeon_ring_ib_execute(rdev, ib) (rdev)->asic->ring_ib_execute((rdev), (ib))
+#define radeon_ib_test(rdev) (rdev)->asic->ib_test((rdev))
#define radeon_irq_set(rdev) (rdev)->asic->irq_set((rdev))
#define radeon_irq_process(rdev) (rdev)->asic->irq_process((rdev))
#define radeon_get_vblank_counter(rdev, crtc) (rdev)->asic->get_vblank_counter((rdev), (crtc))
#define radeon_clear_surface_reg(rdev, r) ((rdev)->asic->clear_surface_reg((rdev), (r)))
#define radeon_bandwidth_update(rdev) (rdev)->asic->bandwidth_update((rdev))
+/* Common functions */
+extern int radeon_gart_table_vram_pin(struct radeon_device *rdev);
+extern int radeon_modeset_init(struct radeon_device *rdev);
+extern void radeon_modeset_fini(struct radeon_device *rdev);
+extern bool radeon_card_posted(struct radeon_device *rdev);
+extern int radeon_clocks_init(struct radeon_device *rdev);
+extern void radeon_clocks_fini(struct radeon_device *rdev);
+extern void radeon_scratch_init(struct radeon_device *rdev);
+extern void radeon_surface_init(struct radeon_device *rdev);
+extern int radeon_cs_parser_init(struct radeon_cs_parser *p, void *data);
+extern void radeon_atom_set_clock_gating(struct radeon_device *rdev, int enable);
+
+/* r100,rv100,rs100,rv200,rs200,r200,rv250,rs300,rv280 */
+struct r100_mc_save {
+ u32 GENMO_WT;
+ u32 CRTC_EXT_CNTL;
+ u32 CRTC_GEN_CNTL;
+ u32 CRTC2_GEN_CNTL;
+ u32 CUR_OFFSET;
+ u32 CUR2_OFFSET;
+};
+extern void r100_cp_disable(struct radeon_device *rdev);
+extern int r100_cp_init(struct radeon_device *rdev, unsigned ring_size);
+extern void r100_cp_fini(struct radeon_device *rdev);
+extern void r100_pci_gart_tlb_flush(struct radeon_device *rdev);
+extern int r100_pci_gart_init(struct radeon_device *rdev);
+extern void r100_pci_gart_fini(struct radeon_device *rdev);
+extern int r100_pci_gart_enable(struct radeon_device *rdev);
+extern void r100_pci_gart_disable(struct radeon_device *rdev);
+extern int r100_pci_gart_set_page(struct radeon_device *rdev, int i, uint64_t addr);
+extern int r100_debugfs_mc_info_init(struct radeon_device *rdev);
+extern int r100_gui_wait_for_idle(struct radeon_device *rdev);
+extern void r100_ib_fini(struct radeon_device *rdev);
+extern int r100_ib_init(struct radeon_device *rdev);
+extern void r100_irq_disable(struct radeon_device *rdev);
+extern int r100_irq_set(struct radeon_device *rdev);
+extern void r100_mc_stop(struct radeon_device *rdev, struct r100_mc_save *save);
+extern void r100_mc_resume(struct radeon_device *rdev, struct r100_mc_save *save);
+extern void r100_vram_init_sizes(struct radeon_device *rdev);
+extern void r100_wb_disable(struct radeon_device *rdev);
+extern void r100_wb_fini(struct radeon_device *rdev);
+extern int r100_wb_init(struct radeon_device *rdev);
+extern void r100_hdp_reset(struct radeon_device *rdev);
+extern int r100_rb2d_reset(struct radeon_device *rdev);
+extern int r100_cp_reset(struct radeon_device *rdev);
+
+/* r300,r350,rv350,rv370,rv380 */
+extern void r300_set_reg_safe(struct radeon_device *rdev);
+extern void r300_mc_program(struct radeon_device *rdev);
+extern void r300_vram_info(struct radeon_device *rdev);
+extern int rv370_pcie_gart_init(struct radeon_device *rdev);
+extern void rv370_pcie_gart_fini(struct radeon_device *rdev);
+extern int rv370_pcie_gart_enable(struct radeon_device *rdev);
+extern void rv370_pcie_gart_disable(struct radeon_device *rdev);
+
+/* r420,r423,rv410 */
+extern int r420_mc_init(struct radeon_device *rdev);
+extern u32 r420_mc_rreg(struct radeon_device *rdev, u32 reg);
+extern void r420_mc_wreg(struct radeon_device *rdev, u32 reg, u32 v);
+extern int r420_debugfs_pipes_info_init(struct radeon_device *rdev);
+extern void r420_pipes_init(struct radeon_device *rdev);
+
+/* rv515 */
+struct rv515_mc_save {
+ u32 d1vga_control;
+ u32 d2vga_control;
+ u32 vga_render_control;
+ u32 vga_hdp_control;
+ u32 d1crtc_control;
+ u32 d2crtc_control;
+};
+extern void rv515_bandwidth_avivo_update(struct radeon_device *rdev);
+extern void rv515_vga_render_disable(struct radeon_device *rdev);
+extern void rv515_set_safe_registers(struct radeon_device *rdev);
+extern void rv515_mc_stop(struct radeon_device *rdev, struct rv515_mc_save *save);
+extern void rv515_mc_resume(struct radeon_device *rdev, struct rv515_mc_save *save);
+extern void rv515_clock_startup(struct radeon_device *rdev);
+extern void rv515_debugfs(struct radeon_device *rdev);
+extern int rv515_suspend(struct radeon_device *rdev);
+
+/* rs690, rs740 */
+extern void rs690_line_buffer_adjust(struct radeon_device *rdev,
+ struct drm_display_mode *mode1,
+ struct drm_display_mode *mode2);
+
+/* r600, rv610, rv630, rv620, rv635, rv670, rs780, rs880 */
+extern bool r600_card_posted(struct radeon_device *rdev);
+extern void r600_cp_stop(struct radeon_device *rdev);
+extern void r600_ring_init(struct radeon_device *rdev, unsigned ring_size);
+extern int r600_cp_resume(struct radeon_device *rdev);
+extern int r600_count_pipe_bits(uint32_t val);
+extern int r600_gart_clear_page(struct radeon_device *rdev, int i);
+extern int r600_mc_wait_for_idle(struct radeon_device *rdev);
+extern int r600_pcie_gart_init(struct radeon_device *rdev);
+extern void r600_pcie_gart_tlb_flush(struct radeon_device *rdev);
+extern int r600_ib_test(struct radeon_device *rdev);
+extern int r600_ring_test(struct radeon_device *rdev);
+extern int r600_wb_init(struct radeon_device *rdev);
+extern void r600_wb_fini(struct radeon_device *rdev);
+extern void r600_scratch_init(struct radeon_device *rdev);
+extern int r600_blit_init(struct radeon_device *rdev);
+extern void r600_blit_fini(struct radeon_device *rdev);
+extern int r600_cp_init_microcode(struct radeon_device *rdev);
+extern int r600_gpu_reset(struct radeon_device *rdev);
+
#endif
projects / cascardo / linux.git / blobdiff