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path: root/drivers/gpu/drm/via/via_dri1.c
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Diffstat (limited to 'drivers/gpu/drm/via/via_dri1.c')
-rw-r--r--drivers/gpu/drm/via/via_dri1.c3630
1 files changed, 0 insertions, 3630 deletions
diff --git a/drivers/gpu/drm/via/via_dri1.c b/drivers/gpu/drm/via/via_dri1.c
deleted file mode 100644
index 217d1e84b0ea..000000000000
--- a/drivers/gpu/drm/via/via_dri1.c
+++ /dev/null
@@ -1,3630 +0,0 @@
-/*
- * Copyright 1998-2003 VIA Technologies, Inc. All Rights Reserved.
- * Copyright 2001-2003 S3 Graphics, Inc. All Rights Reserved.
- * Copyright 2002 Tungsten Graphics, Inc.
- * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. All Rights Reserved.
- * Copyright 2006 Tungsten Graphics Inc., Bismarck, ND., USA.
- * Copyright 2004 Digeo, Inc., Palo Alto, CA, U.S.A. All Rights Reserved.
- * Copyright 2004 The Unichrome project. All Rights Reserved.
- * Copyright 2004 BEAM Ltd.
- * Copyright 2005 Thomas Hellstrom. All Rights Reserved.
- *
- * 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, sub license,
- * 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 (including the
- * next paragraph) 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 NON-INFRINGEMENT. IN NO EVENT SHALL
- * VIA, S3 GRAPHICS, AND/OR ITS SUPPLIERS 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 <linux/delay.h>
-#include <linux/module.h>
-#include <linux/pci.h>
-#include <linux/vmalloc.h>
-
-#include <drm/drm_drv.h>
-#include <drm/drm_file.h>
-#include <drm/drm_ioctl.h>
-#include <drm/drm_legacy.h>
-#include <drm/drm_mm.h>
-#include <drm/drm_pciids.h>
-#include <drm/drm_print.h>
-#include <drm/drm_vblank.h>
-#include <drm/via_drm.h>
-
-#include "via_3d_reg.h"
-
-#define DRIVER_AUTHOR "Various"
-
-#define DRIVER_NAME "via"
-#define DRIVER_DESC "VIA Unichrome / Pro"
-#define DRIVER_DATE "20070202"
-
-#define DRIVER_MAJOR 2
-#define DRIVER_MINOR 11
-#define DRIVER_PATCHLEVEL 1
-
-typedef enum {
- no_sequence = 0,
- z_address,
- dest_address,
- tex_address
-} drm_via_sequence_t;
-
-typedef struct {
- unsigned texture;
- uint32_t z_addr;
- uint32_t d_addr;
- uint32_t t_addr[2][10];
- uint32_t pitch[2][10];
- uint32_t height[2][10];
- uint32_t tex_level_lo[2];
- uint32_t tex_level_hi[2];
- uint32_t tex_palette_size[2];
- uint32_t tex_npot[2];
- drm_via_sequence_t unfinished;
- int agp_texture;
- int multitex;
- struct drm_device *dev;
- drm_local_map_t *map_cache;
- uint32_t vertex_count;
- int agp;
- const uint32_t *buf_start;
-} drm_via_state_t;
-
-#define VIA_PCI_BUF_SIZE 60000
-#define VIA_FIRE_BUF_SIZE 1024
-#define VIA_NUM_IRQS 4
-
-
-#define VIA_NUM_BLIT_ENGINES 2
-#define VIA_NUM_BLIT_SLOTS 8
-
-struct _drm_via_descriptor;
-
-typedef struct _drm_via_sg_info {
- struct page **pages;
- unsigned long num_pages;
- struct _drm_via_descriptor **desc_pages;
- int num_desc_pages;
- int num_desc;
- enum dma_data_direction direction;
- unsigned char *bounce_buffer;
- dma_addr_t chain_start;
- uint32_t free_on_sequence;
- unsigned int descriptors_per_page;
- int aborted;
- enum {
- dr_via_device_mapped,
- dr_via_desc_pages_alloc,
- dr_via_pages_locked,
- dr_via_pages_alloc,
- dr_via_sg_init
- } state;
-} drm_via_sg_info_t;
-
-typedef struct _drm_via_blitq {
- struct drm_device *dev;
- uint32_t cur_blit_handle;
- uint32_t done_blit_handle;
- unsigned serviced;
- unsigned head;
- unsigned cur;
- unsigned num_free;
- unsigned num_outstanding;
- unsigned long end;
- int aborting;
- int is_active;
- drm_via_sg_info_t *blits[VIA_NUM_BLIT_SLOTS];
- spinlock_t blit_lock;
- wait_queue_head_t blit_queue[VIA_NUM_BLIT_SLOTS];
- wait_queue_head_t busy_queue;
- struct work_struct wq;
- struct timer_list poll_timer;
-} drm_via_blitq_t;
-
-typedef struct drm_via_ring_buffer {
- drm_local_map_t map;
- char *virtual_start;
-} drm_via_ring_buffer_t;
-
-typedef uint32_t maskarray_t[5];
-
-typedef struct drm_via_irq {
- atomic_t irq_received;
- uint32_t pending_mask;
- uint32_t enable_mask;
- wait_queue_head_t irq_queue;
-} drm_via_irq_t;
-
-typedef struct drm_via_private {
- drm_via_sarea_t *sarea_priv;
- drm_local_map_t *sarea;
- drm_local_map_t *fb;
- drm_local_map_t *mmio;
- unsigned long agpAddr;
- wait_queue_head_t decoder_queue[VIA_NR_XVMC_LOCKS];
- char *dma_ptr;
- unsigned int dma_low;
- unsigned int dma_high;
- unsigned int dma_offset;
- uint32_t dma_wrap;
- volatile uint32_t *last_pause_ptr;
- volatile uint32_t *hw_addr_ptr;
- drm_via_ring_buffer_t ring;
- ktime_t last_vblank;
- int last_vblank_valid;
- ktime_t nsec_per_vblank;
- atomic_t vbl_received;
- drm_via_state_t hc_state;
- char pci_buf[VIA_PCI_BUF_SIZE];
- const uint32_t *fire_offsets[VIA_FIRE_BUF_SIZE];
- uint32_t num_fire_offsets;
- int chipset;
- drm_via_irq_t via_irqs[VIA_NUM_IRQS];
- unsigned num_irqs;
- maskarray_t *irq_masks;
- uint32_t irq_enable_mask;
- uint32_t irq_pending_mask;
- int *irq_map;
- unsigned int idle_fault;
- int vram_initialized;
- struct drm_mm vram_mm;
- int agp_initialized;
- struct drm_mm agp_mm;
- /** Mapping of userspace keys to mm objects */
- struct idr object_idr;
- unsigned long vram_offset;
- unsigned long agp_offset;
- drm_via_blitq_t blit_queues[VIA_NUM_BLIT_ENGINES];
- uint32_t dma_diff;
-} drm_via_private_t;
-
-struct via_file_private {
- struct list_head obj_list;
-};
-
-enum via_family {
- VIA_OTHER = 0, /* Baseline */
- VIA_PRO_GROUP_A, /* Another video engine and DMA commands */
- VIA_DX9_0 /* Same video as pro_group_a, but 3D is unsupported */
-};
-
-/* VIA MMIO register access */
-static inline u32 via_read(struct drm_via_private *dev_priv, u32 reg)
-{
- return readl((void __iomem *)(dev_priv->mmio->handle + reg));
-}
-
-static inline void via_write(struct drm_via_private *dev_priv, u32 reg,
- u32 val)
-{
- writel(val, (void __iomem *)(dev_priv->mmio->handle + reg));
-}
-
-static inline void via_write8(struct drm_via_private *dev_priv, u32 reg,
- u32 val)
-{
- writeb(val, (void __iomem *)(dev_priv->mmio->handle + reg));
-}
-
-static inline void via_write8_mask(struct drm_via_private *dev_priv,
- u32 reg, u32 mask, u32 val)
-{
- u32 tmp;
-
- tmp = readb((void __iomem *)(dev_priv->mmio->handle + reg));
- tmp = (tmp & ~mask) | (val & mask);
- writeb(tmp, (void __iomem *)(dev_priv->mmio->handle + reg));
-}
-
-/*
- * Poll in a loop waiting for 'contidition' to be true.
- * Note: A direct replacement with wait_event_interruptible_timeout()
- * will not work unless driver is updated to emit wake_up()
- * in relevant places that can impact the 'condition'
- *
- * Returns:
- * ret keeps current value if 'condition' becomes true
- * ret = -BUSY if timeout happens
- * ret = -EINTR if a signal interrupted the waiting period
- */
-#define VIA_WAIT_ON( ret, queue, timeout, condition ) \
-do { \
- DECLARE_WAITQUEUE(entry, current); \
- unsigned long end = jiffies + (timeout); \
- add_wait_queue(&(queue), &entry); \
- \
- for (;;) { \
- __set_current_state(TASK_INTERRUPTIBLE); \
- if (condition) \
- break; \
- if (time_after_eq(jiffies, end)) { \
- ret = -EBUSY; \
- break; \
- } \
- schedule_timeout((HZ/100 > 1) ? HZ/100 : 1); \
- if (signal_pending(current)) { \
- ret = -EINTR; \
- break; \
- } \
- } \
- __set_current_state(TASK_RUNNING); \
- remove_wait_queue(&(queue), &entry); \
-} while (0)
-
-int via_do_cleanup_map(struct drm_device *dev);
-
-int via_dma_cleanup(struct drm_device *dev);
-int via_driver_dma_quiescent(struct drm_device *dev);
-
-#define CMDBUF_ALIGNMENT_SIZE (0x100)
-#define CMDBUF_ALIGNMENT_MASK (0x0ff)
-
-/* defines for VIA 3D registers */
-#define VIA_REG_STATUS 0x400
-#define VIA_REG_TRANSET 0x43C
-#define VIA_REG_TRANSPACE 0x440
-
-/* VIA_REG_STATUS(0x400): Engine Status */
-#define VIA_CMD_RGTR_BUSY 0x00000080 /* Command Regulator is busy */
-#define VIA_2D_ENG_BUSY 0x00000001 /* 2D Engine is busy */
-#define VIA_3D_ENG_BUSY 0x00000002 /* 3D Engine is busy */
-#define VIA_VR_QUEUE_BUSY 0x00020000 /* Virtual Queue is busy */
-
-#define SetReg2DAGP(nReg, nData) { \
- *((uint32_t *)(vb)) = ((nReg) >> 2) | HALCYON_HEADER1; \
- *((uint32_t *)(vb) + 1) = (nData); \
- vb = ((uint32_t *)vb) + 2; \
- dev_priv->dma_low += 8; \
-}
-
-#define via_flush_write_combine() mb()
-
-#define VIA_OUT_RING_QW(w1, w2) do { \
- *vb++ = (w1); \
- *vb++ = (w2); \
- dev_priv->dma_low += 8; \
-} while (0)
-
-#define VIA_MM_ALIGN_SHIFT 4
-#define VIA_MM_ALIGN_MASK ((1 << VIA_MM_ALIGN_SHIFT) - 1)
-
-struct via_memblock {
- struct drm_mm_node mm_node;
- struct list_head owner_list;
-};
-
-#define VIA_REG_INTERRUPT 0x200
-
-/* VIA_REG_INTERRUPT */
-#define VIA_IRQ_GLOBAL (1 << 31)
-#define VIA_IRQ_VBLANK_ENABLE (1 << 19)
-#define VIA_IRQ_VBLANK_PENDING (1 << 3)
-#define VIA_IRQ_HQV0_ENABLE (1 << 11)
-#define VIA_IRQ_HQV1_ENABLE (1 << 25)
-#define VIA_IRQ_HQV0_PENDING (1 << 9)
-#define VIA_IRQ_HQV1_PENDING (1 << 10)
-#define VIA_IRQ_DMA0_DD_ENABLE (1 << 20)
-#define VIA_IRQ_DMA0_TD_ENABLE (1 << 21)
-#define VIA_IRQ_DMA1_DD_ENABLE (1 << 22)
-#define VIA_IRQ_DMA1_TD_ENABLE (1 << 23)
-#define VIA_IRQ_DMA0_DD_PENDING (1 << 4)
-#define VIA_IRQ_DMA0_TD_PENDING (1 << 5)
-#define VIA_IRQ_DMA1_DD_PENDING (1 << 6)
-#define VIA_IRQ_DMA1_TD_PENDING (1 << 7)
-
-/*
- * PCI DMA Registers
- * Channels 2 & 3 don't seem to be implemented in hardware.
- */
-
-#define VIA_PCI_DMA_MAR0 0xE40 /* Memory Address Register of Channel 0 */
-#define VIA_PCI_DMA_DAR0 0xE44 /* Device Address Register of Channel 0 */
-#define VIA_PCI_DMA_BCR0 0xE48 /* Byte Count Register of Channel 0 */
-#define VIA_PCI_DMA_DPR0 0xE4C /* Descriptor Pointer Register of Channel 0 */
-
-#define VIA_PCI_DMA_MAR1 0xE50 /* Memory Address Register of Channel 1 */
-#define VIA_PCI_DMA_DAR1 0xE54 /* Device Address Register of Channel 1 */
-#define VIA_PCI_DMA_BCR1 0xE58 /* Byte Count Register of Channel 1 */
-#define VIA_PCI_DMA_DPR1 0xE5C /* Descriptor Pointer Register of Channel 1 */
-
-#define VIA_PCI_DMA_MAR2 0xE60 /* Memory Address Register of Channel 2 */
-#define VIA_PCI_DMA_DAR2 0xE64 /* Device Address Register of Channel 2 */
-#define VIA_PCI_DMA_BCR2 0xE68 /* Byte Count Register of Channel 2 */
-#define VIA_PCI_DMA_DPR2 0xE6C /* Descriptor Pointer Register of Channel 2 */
-
-#define VIA_PCI_DMA_MAR3 0xE70 /* Memory Address Register of Channel 3 */
-#define VIA_PCI_DMA_DAR3 0xE74 /* Device Address Register of Channel 3 */
-#define VIA_PCI_DMA_BCR3 0xE78 /* Byte Count Register of Channel 3 */
-#define VIA_PCI_DMA_DPR3 0xE7C /* Descriptor Pointer Register of Channel 3 */
-
-#define VIA_PCI_DMA_MR0 0xE80 /* Mode Register of Channel 0 */
-#define VIA_PCI_DMA_MR1 0xE84 /* Mode Register of Channel 1 */
-#define VIA_PCI_DMA_MR2 0xE88 /* Mode Register of Channel 2 */
-#define VIA_PCI_DMA_MR3 0xE8C /* Mode Register of Channel 3 */
-
-#define VIA_PCI_DMA_CSR0 0xE90 /* Command/Status Register of Channel 0 */
-#define VIA_PCI_DMA_CSR1 0xE94 /* Command/Status Register of Channel 1 */
-#define VIA_PCI_DMA_CSR2 0xE98 /* Command/Status Register of Channel 2 */
-#define VIA_PCI_DMA_CSR3 0xE9C /* Command/Status Register of Channel 3 */
-
-#define VIA_PCI_DMA_PTR 0xEA0 /* Priority Type Register */
-
-/* Define for DMA engine */
-/* DPR */
-#define VIA_DMA_DPR_EC (1<<1) /* end of chain */
-#define VIA_DMA_DPR_DDIE (1<<2) /* descriptor done interrupt enable */
-#define VIA_DMA_DPR_DT (1<<3) /* direction of transfer (RO) */
-
-/* MR */
-#define VIA_DMA_MR_CM (1<<0) /* chaining mode */
-#define VIA_DMA_MR_TDIE (1<<1) /* transfer done interrupt enable */
-#define VIA_DMA_MR_HENDMACMD (1<<7) /* ? */
-
-/* CSR */
-#define VIA_DMA_CSR_DE (1<<0) /* DMA enable */
-#define VIA_DMA_CSR_TS (1<<1) /* transfer start */
-#define VIA_DMA_CSR_TA (1<<2) /* transfer abort */
-#define VIA_DMA_CSR_TD (1<<3) /* transfer done */
-#define VIA_DMA_CSR_DD (1<<4) /* descriptor done */
-#define VIA_DMA_DPR_EC (1<<1) /* end of chain */
-
-/*
- * Device-specific IRQs go here. This type might need to be extended with
- * the register if there are multiple IRQ control registers.
- * Currently we activate the HQV interrupts of Unichrome Pro group A.
- */
-
-static maskarray_t via_pro_group_a_irqs[] = {
- {VIA_IRQ_HQV0_ENABLE, VIA_IRQ_HQV0_PENDING, 0x000003D0, 0x00008010,
- 0x00000000 },
- {VIA_IRQ_HQV1_ENABLE, VIA_IRQ_HQV1_PENDING, 0x000013D0, 0x00008010,
- 0x00000000 },
- {VIA_IRQ_DMA0_TD_ENABLE, VIA_IRQ_DMA0_TD_PENDING, VIA_PCI_DMA_CSR0,
- VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008},
- {VIA_IRQ_DMA1_TD_ENABLE, VIA_IRQ_DMA1_TD_PENDING, VIA_PCI_DMA_CSR1,
- VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008},
-};
-static int via_num_pro_group_a = ARRAY_SIZE(via_pro_group_a_irqs);
-static int via_irqmap_pro_group_a[] = {0, 1, -1, 2, -1, 3};
-
-static maskarray_t via_unichrome_irqs[] = {
- {VIA_IRQ_DMA0_TD_ENABLE, VIA_IRQ_DMA0_TD_PENDING, VIA_PCI_DMA_CSR0,
- VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008},
- {VIA_IRQ_DMA1_TD_ENABLE, VIA_IRQ_DMA1_TD_PENDING, VIA_PCI_DMA_CSR1,
- VIA_DMA_CSR_TA | VIA_DMA_CSR_TD, 0x00000008}
-};
-static int via_num_unichrome = ARRAY_SIZE(via_unichrome_irqs);
-static int via_irqmap_unichrome[] = {-1, -1, -1, 0, -1, 1};
-
-
-/*
- * Unmaps the DMA mappings.
- * FIXME: Is this a NoOp on x86? Also
- * FIXME: What happens if this one is called and a pending blit has previously done
- * the same DMA mappings?
- */
-#define VIA_PGDN(x) (((unsigned long)(x)) & PAGE_MASK)
-#define VIA_PGOFF(x) (((unsigned long)(x)) & ~PAGE_MASK)
-#define VIA_PFN(x) ((unsigned long)(x) >> PAGE_SHIFT)
-
-typedef struct _drm_via_descriptor {
- uint32_t mem_addr;
- uint32_t dev_addr;
- uint32_t size;
- uint32_t next;
-} drm_via_descriptor_t;
-
-typedef enum {
- state_command,
- state_header2,
- state_header1,
- state_vheader5,
- state_vheader6,
- state_error
-} verifier_state_t;
-
-typedef enum {
- no_check = 0,
- check_for_header2,
- check_for_header1,
- check_for_header2_err,
- check_for_header1_err,
- check_for_fire,
- check_z_buffer_addr0,
- check_z_buffer_addr1,
- check_z_buffer_addr_mode,
- check_destination_addr0,
- check_destination_addr1,
- check_destination_addr_mode,
- check_for_dummy,
- check_for_dd,
- check_texture_addr0,
- check_texture_addr1,
- check_texture_addr2,
- check_texture_addr3,
- check_texture_addr4,
- check_texture_addr5,
- check_texture_addr6,
- check_texture_addr7,
- check_texture_addr8,
- check_texture_addr_mode,
- check_for_vertex_count,
- check_number_texunits,
- forbidden_command
-} hazard_t;
-
-/*
- * Associates each hazard above with a possible multi-command
- * sequence. For example an address that is split over multiple
- * commands and that needs to be checked at the first command
- * that does not include any part of the address.
- */
-
-static drm_via_sequence_t seqs[] = {
- no_sequence,
- no_sequence,
- no_sequence,
- no_sequence,
- no_sequence,
- no_sequence,
- z_address,
- z_address,
- z_address,
- dest_address,
- dest_address,
- dest_address,
- no_sequence,
- no_sequence,
- tex_address,
- tex_address,
- tex_address,
- tex_address,
- tex_address,
- tex_address,
- tex_address,
- tex_address,
- tex_address,
- tex_address,
- no_sequence
-};
-
-typedef struct {
- unsigned int code;
- hazard_t hz;
-} hz_init_t;
-
-static hz_init_t init_table1[] = {
- {0xf2, check_for_header2_err},
- {0xf0, check_for_header1_err},
- {0xee, check_for_fire},
- {0xcc, check_for_dummy},
- {0xdd, check_for_dd},
- {0x00, no_check},
- {0x10, check_z_buffer_addr0},
- {0x11, check_z_buffer_addr1},
- {0x12, check_z_buffer_addr_mode},
- {0x13, no_check},
- {0x14, no_check},
- {0x15, no_check},
- {0x23, no_check},
- {0x24, no_check},
- {0x33, no_check},
- {0x34, no_check},
- {0x35, no_check},
- {0x36, no_check},
- {0x37, no_check},
- {0x38, no_check},
- {0x39, no_check},
- {0x3A, no_check},
- {0x3B, no_check},
- {0x3C, no_check},
- {0x3D, no_check},
- {0x3E, no_check},
- {0x40, check_destination_addr0},
- {0x41, check_destination_addr1},
- {0x42, check_destination_addr_mode},
- {0x43, no_check},
- {0x44, no_check},
- {0x50, no_check},
- {0x51, no_check},
- {0x52, no_check},
- {0x53, no_check},
- {0x54, no_check},
- {0x55, no_check},
- {0x56, no_check},
- {0x57, no_check},
- {0x58, no_check},
- {0x70, no_check},
- {0x71, no_check},
- {0x78, no_check},
- {0x79, no_check},
- {0x7A, no_check},
- {0x7B, no_check},
- {0x7C, no_check},
- {0x7D, check_for_vertex_count}
-};
-
-static hz_init_t init_table2[] = {
- {0xf2, check_for_header2_err},
- {0xf0, check_for_header1_err},
- {0xee, check_for_fire},
- {0xcc, check_for_dummy},
- {0x00, check_texture_addr0},
- {0x01, check_texture_addr0},
- {0x02, check_texture_addr0},
- {0x03, check_texture_addr0},
- {0x04, check_texture_addr0},
- {0x05, check_texture_addr0},
- {0x06, check_texture_addr0},
- {0x07, check_texture_addr0},
- {0x08, check_texture_addr0},
- {0x09, check_texture_addr0},
- {0x20, check_texture_addr1},
- {0x21, check_texture_addr1},
- {0x22, check_texture_addr1},
- {0x23, check_texture_addr4},
- {0x2B, check_texture_addr3},
- {0x2C, check_texture_addr3},
- {0x2D, check_texture_addr3},
- {0x2E, check_texture_addr3},
- {0x2F, check_texture_addr3},
- {0x30, check_texture_addr3},
- {0x31, check_texture_addr3},
- {0x32, check_texture_addr3},
- {0x33, check_texture_addr3},
- {0x34, check_texture_addr3},
- {0x4B, check_texture_addr5},
- {0x4C, check_texture_addr6},
- {0x51, check_texture_addr7},
- {0x52, check_texture_addr8},
- {0x77, check_texture_addr2},
- {0x78, no_check},
- {0x79, no_check},
- {0x7A, no_check},
- {0x7B, check_texture_addr_mode},
- {0x7C, no_check},
- {0x7D, no_check},
- {0x7E, no_check},
- {0x7F, no_check},
- {0x80, no_check},
- {0x81, no_check},
- {0x82, no_check},
- {0x83, no_check},
- {0x85, no_check},
- {0x86, no_check},
- {0x87, no_check},
- {0x88, no_check},
- {0x89, no_check},
- {0x8A, no_check},
- {0x90, no_check},
- {0x91, no_check},
- {0x92, no_check},
- {0x93, no_check}
-};
-
-static hz_init_t init_table3[] = {
- {0xf2, check_for_header2_err},
- {0xf0, check_for_header1_err},
- {0xcc, check_for_dummy},
- {0x00, check_number_texunits}
-};
-
-static hazard_t table1[256];
-static hazard_t table2[256];
-static hazard_t table3[256];
-
-static __inline__ int
-eat_words(const uint32_t **buf, const uint32_t *buf_end, unsigned num_words)
-{
- if ((buf_end - *buf) >= num_words) {
- *buf += num_words;
- return 0;
- }
- DRM_ERROR("Illegal termination of DMA command buffer\n");
- return 1;
-}
-
-/*
- * Partially stolen from drm_memory.h
- */
-
-static __inline__ drm_local_map_t *via_drm_lookup_agp_map(drm_via_state_t *seq,
- unsigned long offset,
- unsigned long size,
- struct drm_device *dev)
-{
- struct drm_map_list *r_list;
- drm_local_map_t *map = seq->map_cache;
-
- if (map && map->offset <= offset
- && (offset + size) <= (map->offset + map->size)) {
- return map;
- }
-
- list_for_each_entry(r_list, &dev->maplist, head) {
- map = r_list->map;
- if (!map)
- continue;
- if (map->offset <= offset
- && (offset + size) <= (map->offset + map->size)
- && !(map->flags & _DRM_RESTRICTED)
- && (map->type == _DRM_AGP)) {
- seq->map_cache = map;
- return map;
- }
- }
- return NULL;
-}
-
-/*
- * Require that all AGP texture levels reside in the same AGP map which should
- * be mappable by the client. This is not a big restriction.
- * FIXME: To actually enforce this security policy strictly, drm_rmmap
- * would have to wait for dma quiescent before removing an AGP map.
- * The via_drm_lookup_agp_map call in reality seems to take
- * very little CPU time.
- */
-
-static __inline__ int finish_current_sequence(drm_via_state_t * cur_seq)
-{
- switch (cur_seq->unfinished) {
- case z_address:
- DRM_DEBUG("Z Buffer start address is 0x%x\n", cur_seq->z_addr);
- break;
- case dest_address:
- DRM_DEBUG("Destination start address is 0x%x\n",
- cur_seq->d_addr);
- break;
- case tex_address:
- if (cur_seq->agp_texture) {
- unsigned start =
- cur_seq->tex_level_lo[cur_seq->texture];
- unsigned end = cur_seq->tex_level_hi[cur_seq->texture];
- unsigned long lo = ~0, hi = 0, tmp;
- uint32_t *addr, *pitch, *height, tex;
- unsigned i;
- int npot;
-
- if (end > 9)
- end = 9;
- if (start > 9)
- start = 9;
-
- addr =
- &(cur_seq->t_addr[tex = cur_seq->texture][start]);
- pitch = &(cur_seq->pitch[tex][start]);
- height = &(cur_seq->height[tex][start]);
- npot = cur_seq->tex_npot[tex];
- for (i = start; i <= end; ++i) {
- tmp = *addr++;
- if (tmp < lo)
- lo = tmp;
- if (i == 0 && npot)
- tmp += (*height++ * *pitch++);
- else
- tmp += (*height++ << *pitch++);
- if (tmp > hi)
- hi = tmp;
- }
-
- if (!via_drm_lookup_agp_map
- (cur_seq, lo, hi - lo, cur_seq->dev)) {
- DRM_ERROR
- ("AGP texture is not in allowed map\n");
- return 2;
- }
- }
- break;
- default:
- break;
- }
- cur_seq->unfinished = no_sequence;
- return 0;
-}
-
-static __inline__ int
-investigate_hazard(uint32_t cmd, hazard_t hz, drm_via_state_t *cur_seq)
-{
- register uint32_t tmp, *tmp_addr;
-
- if (cur_seq->unfinished && (cur_seq->unfinished != seqs[hz])) {
- int ret;
- if ((ret = finish_current_sequence(cur_seq)))
- return ret;
- }
-
- switch (hz) {
- case check_for_header2:
- if (cmd == HALCYON_HEADER2)
- return 1;
- return 0;
- case check_for_header1:
- if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
- return 1;
- return 0;
- case check_for_header2_err:
- if (cmd == HALCYON_HEADER2)
- return 1;
- DRM_ERROR("Illegal DMA HALCYON_HEADER2 command\n");
- break;
- case check_for_header1_err:
- if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
- return 1;
- DRM_ERROR("Illegal DMA HALCYON_HEADER1 command\n");
- break;
- case check_for_fire:
- if ((cmd & HALCYON_FIREMASK) == HALCYON_FIRECMD)
- return 1;
- DRM_ERROR("Illegal DMA HALCYON_FIRECMD command\n");
- break;
- case check_for_dummy:
- if (HC_DUMMY == cmd)
- return 0;
- DRM_ERROR("Illegal DMA HC_DUMMY command\n");
- break;
- case check_for_dd:
- if (0xdddddddd == cmd)
- return 0;
- DRM_ERROR("Illegal DMA 0xdddddddd command\n");
- break;
- case check_z_buffer_addr0:
- cur_seq->unfinished = z_address;
- cur_seq->z_addr = (cur_seq->z_addr & 0xFF000000) |
- (cmd & 0x00FFFFFF);
- return 0;
- case check_z_buffer_addr1:
- cur_seq->unfinished = z_address;
- cur_seq->z_addr = (cur_seq->z_addr & 0x00FFFFFF) |
- ((cmd & 0xFF) << 24);
- return 0;
- case check_z_buffer_addr_mode:
- cur_seq->unfinished = z_address;
- if ((cmd & 0x0000C000) == 0)
- return 0;
- DRM_ERROR("Attempt to place Z buffer in system memory\n");
- return 2;
- case check_destination_addr0:
- cur_seq->unfinished = dest_address;
- cur_seq->d_addr = (cur_seq->d_addr & 0xFF000000) |
- (cmd & 0x00FFFFFF);
- return 0;
- case check_destination_addr1:
- cur_seq->unfinished = dest_address;
- cur_seq->d_addr = (cur_seq->d_addr & 0x00FFFFFF) |
- ((cmd & 0xFF) << 24);
- return 0;
- case check_destination_addr_mode:
- cur_seq->unfinished = dest_address;
- if ((cmd & 0x0000C000) == 0)
- return 0;
- DRM_ERROR
- ("Attempt to place 3D drawing buffer in system memory\n");
- return 2;
- case check_texture_addr0:
- cur_seq->unfinished = tex_address;
- tmp = (cmd >> 24);
- tmp_addr = &cur_seq->t_addr[cur_seq->texture][tmp];
- *tmp_addr = (*tmp_addr & 0xFF000000) | (cmd & 0x00FFFFFF);
- return 0;
- case check_texture_addr1:
- cur_seq->unfinished = tex_address;
- tmp = ((cmd >> 24) - 0x20);
- tmp += tmp << 1;
- tmp_addr = &cur_seq->t_addr[cur_seq->texture][tmp];
- *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF) << 24);
- tmp_addr++;
- *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF00) << 16);
- tmp_addr++;
- *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF0000) << 8);
- return 0;
- case check_texture_addr2:
- cur_seq->unfinished = tex_address;
- cur_seq->tex_level_lo[tmp = cur_seq->texture] = cmd & 0x3F;
- cur_seq->tex_level_hi[tmp] = (cmd & 0xFC0) >> 6;
- return 0;
- case check_texture_addr3:
- cur_seq->unfinished = tex_address;
- tmp = ((cmd >> 24) - HC_SubA_HTXnL0Pit);
- if (tmp == 0 &&
- (cmd & HC_HTXnEnPit_MASK)) {
- cur_seq->pitch[cur_seq->texture][tmp] =
- (cmd & HC_HTXnLnPit_MASK);
- cur_seq->tex_npot[cur_seq->texture] = 1;
- } else {
- cur_seq->pitch[cur_seq->texture][tmp] =
- (cmd & HC_HTXnLnPitE_MASK) >> HC_HTXnLnPitE_SHIFT;
- cur_seq->tex_npot[cur_seq->texture] = 0;
- if (cmd & 0x000FFFFF) {
- DRM_ERROR
- ("Unimplemented texture level 0 pitch mode.\n");
- return 2;
- }
- }
- return 0;
- case check_texture_addr4:
- cur_seq->unfinished = tex_address;
- tmp_addr = &cur_seq->t_addr[cur_seq->texture][9];
- *tmp_addr = (*tmp_addr & 0x00FFFFFF) | ((cmd & 0xFF) << 24);
- return 0;
- case check_texture_addr5:
- case check_texture_addr6:
- cur_seq->unfinished = tex_address;
- /*
- * Texture width. We don't care since we have the pitch.
- */
- return 0;
- case check_texture_addr7:
- cur_seq->unfinished = tex_address;
- tmp_addr = &(cur_seq->height[cur_seq->texture][0]);
- tmp_addr[5] = 1 << ((cmd & 0x00F00000) >> 20);
- tmp_addr[4] = 1 << ((cmd & 0x000F0000) >> 16);
- tmp_addr[3] = 1 << ((cmd & 0x0000F000) >> 12);
- tmp_addr[2] = 1 << ((cmd & 0x00000F00) >> 8);
- tmp_addr[1] = 1 << ((cmd & 0x000000F0) >> 4);
- tmp_addr[0] = 1 << (cmd & 0x0000000F);
- return 0;
- case check_texture_addr8:
- cur_seq->unfinished = tex_address;
- tmp_addr = &(cur_seq->height[cur_seq->texture][0]);
- tmp_addr[9] = 1 << ((cmd & 0x0000F000) >> 12);
- tmp_addr[8] = 1 << ((cmd & 0x00000F00) >> 8);
- tmp_addr[7] = 1 << ((cmd & 0x000000F0) >> 4);
- tmp_addr[6] = 1 << (cmd & 0x0000000F);
- return 0;
- case check_texture_addr_mode:
- cur_seq->unfinished = tex_address;
- if (2 == (tmp = cmd & 0x00000003)) {
- DRM_ERROR
- ("Attempt to fetch texture from system memory.\n");
- return 2;
- }
- cur_seq->agp_texture = (tmp == 3);
- cur_seq->tex_palette_size[cur_seq->texture] =
- (cmd >> 16) & 0x000000007;
- return 0;
- case check_for_vertex_count:
- cur_seq->vertex_count = cmd & 0x0000FFFF;
- return 0;
- case check_number_texunits:
- cur_seq->multitex = (cmd >> 3) & 1;
- return 0;
- default:
- DRM_ERROR("Illegal DMA data: 0x%x\n", cmd);
- return 2;
- }
- return 2;
-}
-
-static __inline__ int
-via_check_prim_list(uint32_t const **buffer, const uint32_t * buf_end,
- drm_via_state_t *cur_seq)
-{
- drm_via_private_t *dev_priv =
- (drm_via_private_t *) cur_seq->dev->dev_private;
- uint32_t a_fire, bcmd, dw_count;
- int ret = 0;
- int have_fire;
- const uint32_t *buf = *buffer;
-
- while (buf < buf_end) {
- have_fire = 0;
- if ((buf_end - buf) < 2) {
- DRM_ERROR
- ("Unexpected termination of primitive list.\n");
- ret = 1;
- break;
- }
- if ((*buf & HC_ACMD_MASK) != HC_ACMD_HCmdB)
- break;
- bcmd = *buf++;
- if ((*buf & HC_ACMD_MASK) != HC_ACMD_HCmdA) {
- DRM_ERROR("Expected Vertex List A command, got 0x%x\n",
- *buf);
- ret = 1;
- break;
- }
- a_fire =
- *buf++ | HC_HPLEND_MASK | HC_HPMValidN_MASK |
- HC_HE3Fire_MASK;
-
- /*
- * How many dwords per vertex ?
- */
-
- if (cur_seq->agp && ((bcmd & (0xF << 11)) == 0)) {
- DRM_ERROR("Illegal B command vertex data for AGP.\n");
- ret = 1;
- break;
- }
-
- dw_count = 0;
- if (bcmd & (1 << 7))
- dw_count += (cur_seq->multitex) ? 2 : 1;
- if (bcmd & (1 << 8))
- dw_count += (cur_seq->multitex) ? 2 : 1;
- if (bcmd & (1 << 9))
- dw_count++;
- if (bcmd & (1 << 10))
- dw_count++;
- if (bcmd & (1 << 11))
- dw_count++;
- if (bcmd & (1 << 12))
- dw_count++;
- if (bcmd & (1 << 13))
- dw_count++;
- if (bcmd & (1 << 14))
- dw_count++;
-
- while (buf < buf_end) {
- if (*buf == a_fire) {
- if (dev_priv->num_fire_offsets >=
- VIA_FIRE_BUF_SIZE) {
- DRM_ERROR("Fire offset buffer full.\n");
- ret = 1;
- break;
- }
- dev_priv->fire_offsets[dev_priv->
- num_fire_offsets++] =
- buf;
- have_fire = 1;
- buf++;
- if (buf < buf_end && *buf == a_fire)
- buf++;
- break;
- }
- if ((*buf == HALCYON_HEADER2) ||
- ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD)) {
- DRM_ERROR("Missing Vertex Fire command, "
- "Stray Vertex Fire command or verifier "
- "lost sync.\n");
- ret = 1;
- break;
- }
- if ((ret = eat_words(&buf, buf_end, dw_count)))
- break;
- }
- if (buf >= buf_end && !have_fire) {
- DRM_ERROR("Missing Vertex Fire command or verifier "
- "lost sync.\n");
- ret = 1;
- break;
- }
- if (cur_seq->agp && ((buf - cur_seq->buf_start) & 0x01)) {
- DRM_ERROR("AGP Primitive list end misaligned.\n");
- ret = 1;
- break;
- }
- }
- *buffer = buf;
- return ret;
-}
-
-static __inline__ verifier_state_t
-via_check_header2(uint32_t const **buffer, const uint32_t *buf_end,
- drm_via_state_t *hc_state)
-{
- uint32_t cmd;
- int hz_mode;
- hazard_t hz;
- const uint32_t *buf = *buffer;
- const hazard_t *hz_table;
-
- if ((buf_end - buf) < 2) {
- DRM_ERROR
- ("Illegal termination of DMA HALCYON_HEADER2 sequence.\n");
- return state_error;
- }
- buf++;
- cmd = (*buf++ & 0xFFFF0000) >> 16;
-
- switch (cmd) {
- case HC_ParaType_CmdVdata:
- if (via_check_prim_list(&buf, buf_end, hc_state))
- return state_error;
- *buffer = buf;
- return state_command;
- case HC_ParaType_NotTex:
- hz_table = table1;
- break;
- case HC_ParaType_Tex:
- hc_state->texture = 0;
- hz_table = table2;
- break;
- case (HC_ParaType_Tex | (HC_SubType_Tex1 << 8)):
- hc_state->texture = 1;
- hz_table = table2;
- break;
- case (HC_ParaType_Tex | (HC_SubType_TexGeneral << 8)):
- hz_table = table3;
- break;
- case HC_ParaType_Auto:
- if (eat_words(&buf, buf_end, 2))
- return state_error;
- *buffer = buf;
- return state_command;
- case (HC_ParaType_Palette | (HC_SubType_Stipple << 8)):
- if (eat_words(&buf, buf_end, 32))
- return state_error;
- *buffer = buf;
- return state_command;
- case (HC_ParaType_Palette | (HC_SubType_TexPalette0 << 8)):
- case (HC_ParaType_Palette | (HC_SubType_TexPalette1 << 8)):
- DRM_ERROR("Texture palettes are rejected because of "
- "lack of info how to determine their size.\n");
- return state_error;
- case (HC_ParaType_Palette | (HC_SubType_FogTable << 8)):
- DRM_ERROR("Fog factor palettes are rejected because of "
- "lack of info how to determine their size.\n");
- return state_error;
- default:
-
- /*
- * There are some unimplemented HC_ParaTypes here, that
- * need to be implemented if the Mesa driver is extended.
- */
-
- DRM_ERROR("Invalid or unimplemented HALCYON_HEADER2 "
- "DMA subcommand: 0x%x. Previous dword: 0x%x\n",
- cmd, *(buf - 2));
- *buffer = buf;
- return state_error;
- }
-
- while (buf < buf_end) {
- cmd = *buf++;
- if ((hz = hz_table[cmd >> 24])) {
- if ((hz_mode = investigate_hazard(cmd, hz, hc_state))) {
- if (hz_mode == 1) {
- buf--;
- break;
- }
- return state_error;
- }
- } else if (hc_state->unfinished &&
- finish_current_sequence(hc_state)) {
- return state_error;
- }
- }
- if (hc_state->unfinished && finish_current_sequence(hc_state))
- return state_error;
- *buffer = buf;
- return state_command;
-}
-
-static __inline__ verifier_state_t
-via_parse_header2(drm_via_private_t *dev_priv, uint32_t const **buffer,
- const uint32_t *buf_end, int *fire_count)
-{
- uint32_t cmd;
- const uint32_t *buf = *buffer;
- const uint32_t *next_fire;
- int burst = 0;
-
- next_fire = dev_priv->fire_offsets[*fire_count];
- buf++;
- cmd = (*buf & 0xFFFF0000) >> 16;
- via_write(dev_priv, HC_REG_TRANS_SET + HC_REG_BASE, *buf++);
- switch (cmd) {
- case HC_ParaType_CmdVdata:
- while ((buf < buf_end) &&
- (*fire_count < dev_priv->num_fire_offsets) &&
- (*buf & HC_ACMD_MASK) == HC_ACMD_HCmdB) {
- while (buf <= next_fire) {
- via_write(dev_priv, HC_REG_TRANS_SPACE + HC_REG_BASE +
- (burst & 63), *buf++);
- burst += 4;
- }
- if ((buf < buf_end)
- && ((*buf & HALCYON_FIREMASK) == HALCYON_FIRECMD))
- buf++;
-
- if (++(*fire_count) < dev_priv->num_fire_offsets)
- next_fire = dev_priv->fire_offsets[*fire_count];
- }
- break;
- default:
- while (buf < buf_end) {
-
- if (*buf == HC_HEADER2 ||
- (*buf & HALCYON_HEADER1MASK) == HALCYON_HEADER1 ||
- (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5 ||
- (*buf & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
- break;
-
- via_write(dev_priv, HC_REG_TRANS_SPACE + HC_REG_BASE +
- (burst & 63), *buf++);
- burst += 4;
- }
- }
- *buffer = buf;
- return state_command;
-}
-
-static __inline__ int verify_mmio_address(uint32_t address)
-{
- if ((address > 0x3FF) && (address < 0xC00)) {
- DRM_ERROR("Invalid VIDEO DMA command. "
- "Attempt to access 3D- or command burst area.\n");
- return 1;
- } else if ((address > 0xCFF) && (address < 0x1300)) {
- DRM_ERROR("Invalid VIDEO DMA command. "
- "Attempt to access PCI DMA area.\n");
- return 1;
- } else if (address > 0x13FF) {
- DRM_ERROR("Invalid VIDEO DMA command. "
- "Attempt to access VGA registers.\n");
- return 1;
- }
- return 0;
-}
-
-static __inline__ int
-verify_video_tail(uint32_t const **buffer, const uint32_t * buf_end,
- uint32_t dwords)
-{
- const uint32_t *buf = *buffer;
-
- if (buf_end - buf < dwords) {
- DRM_ERROR("Illegal termination of video command.\n");
- return 1;
- }
- while (dwords--) {
- if (*buf++) {
- DRM_ERROR("Illegal video command tail.\n");
- return 1;
- }
- }
- *buffer = buf;
- return 0;
-}
-
-static __inline__ verifier_state_t
-via_check_header1(uint32_t const **buffer, const uint32_t * buf_end)
-{
- uint32_t cmd;
- const uint32_t *buf = *buffer;
- verifier_state_t ret = state_command;
-
- while (buf < buf_end) {
- cmd = *buf;
- if ((cmd > ((0x3FF >> 2) | HALCYON_HEADER1)) &&
- (cmd < ((0xC00 >> 2) | HALCYON_HEADER1))) {
- if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
- break;
- DRM_ERROR("Invalid HALCYON_HEADER1 command. "
- "Attempt to access 3D- or command burst area.\n");
- ret = state_error;
- break;
- } else if (cmd > ((0xCFF >> 2) | HALCYON_HEADER1)) {
- if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
- break;
- DRM_ERROR("Invalid HALCYON_HEADER1 command. "
- "Attempt to access VGA registers.\n");
- ret = state_error;
- break;
- } else {
- buf += 2;
- }
- }
- *buffer = buf;
- return ret;
-}
-
-static __inline__ verifier_state_t
-via_parse_header1(drm_via_private_t *dev_priv, uint32_t const **buffer,
- const uint32_t *buf_end)
-{
- register uint32_t cmd;
- const uint32_t *buf = *buffer;
-
- while (buf < buf_end) {
- cmd = *buf;
- if ((cmd & HALCYON_HEADER1MASK) != HALCYON_HEADER1)
- break;
- via_write(dev_priv, (cmd & ~HALCYON_HEADER1MASK) << 2, *++buf);
- buf++;
- }
- *buffer = buf;
- return state_command;
-}
-
-static __inline__ verifier_state_t
-via_check_vheader5(uint32_t const **buffer, const uint32_t *buf_end)
-{
- uint32_t data;
- const uint32_t *buf = *buffer;
-
- if (buf_end - buf < 4) {
- DRM_ERROR("Illegal termination of video header5 command\n");
- return state_error;
- }
-
- data = *buf++ & ~VIA_VIDEOMASK;
- if (verify_mmio_address(data))
- return state_error;
-
- data = *buf++;
- if (*buf++ != 0x00F50000) {
- DRM_ERROR("Illegal header5 header data\n");
- return state_error;
- }
- if (*buf++ != 0x00000000) {
- DRM_ERROR("Illegal header5 header data\n");
- return state_error;
- }
- if (eat_words(&buf, buf_end, data))
- return state_error;
- if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3)))
- return state_error;
- *buffer = buf;
- return state_command;
-
-}
-
-static __inline__ verifier_state_t
-via_parse_vheader5(drm_via_private_t *dev_priv, uint32_t const **buffer,
- const uint32_t *buf_end)
-{
- uint32_t addr, count, i;
- const uint32_t *buf = *buffer;
-
- addr = *buf++ & ~VIA_VIDEOMASK;
- i = count = *buf;
- buf += 3;
- while (i--)
- via_write(dev_priv, addr, *buf++);
- if (count & 3)
- buf += 4 - (count & 3);
- *buffer = buf;
- return state_command;
-}
-
-static __inline__ verifier_state_t
-via_check_vheader6(uint32_t const **buffer, const uint32_t * buf_end)
-{
- uint32_t data;
- const uint32_t *buf = *buffer;
- uint32_t i;
-
- if (buf_end - buf < 4) {
- DRM_ERROR("Illegal termination of video header6 command\n");
- return state_error;
- }
- buf++;
- data = *buf++;
- if (*buf++ != 0x00F60000) {
- DRM_ERROR("Illegal header6 header data\n");
- return state_error;
- }
- if (*buf++ != 0x00000000) {
- DRM_ERROR("Illegal header6 header data\n");
- return state_error;
- }
- if ((buf_end - buf) < (data << 1)) {
- DRM_ERROR("Illegal termination of video header6 command\n");
- return state_error;
- }
- for (i = 0; i < data; ++i) {
- if (verify_mmio_address(*buf++))
- return state_error;
- buf++;
- }
- data <<= 1;
- if ((data & 3) && verify_video_tail(&buf, buf_end, 4 - (data & 3)))
- return state_error;
- *buffer = buf;
- return state_command;
-}
-
-static __inline__ verifier_state_t
-via_parse_vheader6(drm_via_private_t *dev_priv, uint32_t const **buffer,
- const uint32_t *buf_end)
-{
-
- uint32_t addr, count, i;
- const uint32_t *buf = *buffer;
-
- i = count = *++buf;
- buf += 3;
- while (i--) {
- addr = *buf++;
- via_write(dev_priv, addr, *buf++);
- }
- count <<= 1;
- if (count & 3)
- buf += 4 - (count & 3);
- *buffer = buf;
- return state_command;
-}
-
-static int
-via_verify_command_stream(const uint32_t * buf, unsigned int size,
- struct drm_device * dev, int agp)
-{
-
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- drm_via_state_t *hc_state = &dev_priv->hc_state;
- drm_via_state_t saved_state = *hc_state;
- uint32_t cmd;
- const uint32_t *buf_end = buf + (size >> 2);
- verifier_state_t state = state_command;
- int cme_video;
- int supported_3d;
-
- cme_video = (dev_priv->chipset == VIA_PRO_GROUP_A ||
- dev_priv->chipset == VIA_DX9_0);
-
- supported_3d = dev_priv->chipset != VIA_DX9_0;
-
- hc_state->dev = dev;
- hc_state->unfinished = no_sequence;
- hc_state->map_cache = NULL;
- hc_state->agp = agp;
- hc_state->buf_start = buf;
- dev_priv->num_fire_offsets = 0;
-
- while (buf < buf_end) {
-
- switch (state) {
- case state_header2:
- state = via_check_header2(&buf, buf_end, hc_state);
- break;
- case state_header1:
- state = via_check_header1(&buf, buf_end);
- break;
- case state_vheader5:
- state = via_check_vheader5(&buf, buf_end);
- break;
- case state_vheader6:
- state = via_check_vheader6(&buf, buf_end);
- break;
- case state_command:
- cmd = *buf;
- if ((cmd == HALCYON_HEADER2) && supported_3d)
- state = state_header2;
- else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
- state = state_header1;
- else if (cme_video
- && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5)
- state = state_vheader5;
- else if (cme_video
- && (cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
- state = state_vheader6;
- else if ((cmd == HALCYON_HEADER2) && !supported_3d) {
- DRM_ERROR("Accelerated 3D is not supported on this chipset yet.\n");
- state = state_error;
- } else {
- DRM_ERROR
- ("Invalid / Unimplemented DMA HEADER command. 0x%x\n",
- cmd);
- state = state_error;
- }
- break;
- case state_error:
- default:
- *hc_state = saved_state;
- return -EINVAL;
- }
- }
- if (state == state_error) {
- *hc_state = saved_state;
- return -EINVAL;
- }
- return 0;
-}
-
-static int
-via_parse_command_stream(struct drm_device *dev, const uint32_t *buf,
- unsigned int size)
-{
-
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- uint32_t cmd;
- const uint32_t *buf_end = buf + (size >> 2);
- verifier_state_t state = state_command;
- int fire_count = 0;
-
- while (buf < buf_end) {
-
- switch (state) {
- case state_header2:
- state =
- via_parse_header2(dev_priv, &buf, buf_end,
- &fire_count);
- break;
- case state_header1:
- state = via_parse_header1(dev_priv, &buf, buf_end);
- break;
- case state_vheader5:
- state = via_parse_vheader5(dev_priv, &buf, buf_end);
- break;
- case state_vheader6:
- state = via_parse_vheader6(dev_priv, &buf, buf_end);
- break;
- case state_command:
- cmd = *buf;
- if (cmd == HALCYON_HEADER2)
- state = state_header2;
- else if ((cmd & HALCYON_HEADER1MASK) == HALCYON_HEADER1)
- state = state_header1;
- else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER5)
- state = state_vheader5;
- else if ((cmd & VIA_VIDEOMASK) == VIA_VIDEO_HEADER6)
- state = state_vheader6;
- else {
- DRM_ERROR
- ("Invalid / Unimplemented DMA HEADER command. 0x%x\n",
- cmd);
- state = state_error;
- }
- break;
- case state_error:
- default:
- return -EINVAL;
- }
- }
- if (state == state_error)
- return -EINVAL;
- return 0;
-}
-
-static void
-setup_hazard_table(hz_init_t init_table[], hazard_t table[], int size)
-{
- int i;
-
- for (i = 0; i < 256; ++i)
- table[i] = forbidden_command;
-
- for (i = 0; i < size; ++i)
- table[init_table[i].code] = init_table[i].hz;
-}
-
-static void via_init_command_verifier(void)
-{
- setup_hazard_table(init_table1, table1, ARRAY_SIZE(init_table1));
- setup_hazard_table(init_table2, table2, ARRAY_SIZE(init_table2));
- setup_hazard_table(init_table3, table3, ARRAY_SIZE(init_table3));
-}
-/*
- * Unmap a DMA mapping.
- */
-static void
-via_unmap_blit_from_device(struct pci_dev *pdev, drm_via_sg_info_t *vsg)
-{
- int num_desc = vsg->num_desc;
- unsigned cur_descriptor_page = num_desc / vsg->descriptors_per_page;
- unsigned descriptor_this_page = num_desc % vsg->descriptors_per_page;
- drm_via_descriptor_t *desc_ptr = vsg->desc_pages[cur_descriptor_page] +
- descriptor_this_page;
- dma_addr_t next = vsg->chain_start;
-
- while (num_desc--) {
- if (descriptor_this_page-- == 0) {
- cur_descriptor_page--;
- descriptor_this_page = vsg->descriptors_per_page - 1;
- desc_ptr = vsg->desc_pages[cur_descriptor_page] +
- descriptor_this_page;
- }
- dma_unmap_single(&pdev->dev, next, sizeof(*desc_ptr), DMA_TO_DEVICE);
- dma_unmap_page(&pdev->dev, desc_ptr->mem_addr, desc_ptr->size, vsg->direction);
- next = (dma_addr_t) desc_ptr->next;
- desc_ptr--;
- }
-}
-
-/*
- * If mode = 0, count how many descriptors are needed.
- * If mode = 1, Map the DMA pages for the device, put together and map also the descriptors.
- * Descriptors are run in reverse order by the hardware because we are not allowed to update the
- * 'next' field without syncing calls when the descriptor is already mapped.
- */
-static void
-via_map_blit_for_device(struct pci_dev *pdev,
- const drm_via_dmablit_t *xfer,
- drm_via_sg_info_t *vsg,
- int mode)
-{
- unsigned cur_descriptor_page = 0;
- unsigned num_descriptors_this_page = 0;
- unsigned char *mem_addr = xfer->mem_addr;
- unsigned char *cur_mem;
- unsigned char *first_addr = (unsigned char *)VIA_PGDN(mem_addr);
- uint32_t fb_addr = xfer->fb_addr;
- uint32_t cur_fb;
- unsigned long line_len;
- unsigned remaining_len;
- int num_desc = 0;
- int cur_line;
- dma_addr_t next = 0 | VIA_DMA_DPR_EC;
- drm_via_descriptor_t *desc_ptr = NULL;
-
- if (mode == 1)
- desc_ptr = vsg->desc_pages[cur_descriptor_page];
-
- for (cur_line = 0; cur_line < xfer->num_lines; ++cur_line) {
-
- line_len = xfer->line_length;
- cur_fb = fb_addr;
- cur_mem = mem_addr;
-
- while (line_len > 0) {
-
- remaining_len = min(PAGE_SIZE-VIA_PGOFF(cur_mem), line_len);
- line_len -= remaining_len;
-
- if (mode == 1) {
- desc_ptr->mem_addr =
- dma_map_page(&pdev->dev,
- vsg->pages[VIA_PFN(cur_mem) -
- VIA_PFN(first_addr)],
- VIA_PGOFF(cur_mem), remaining_len,
- vsg->direction);
- desc_ptr->dev_addr = cur_fb;
-
- desc_ptr->size = remaining_len;
- desc_ptr->next = (uint32_t) next;
- next = dma_map_single(&pdev->dev, desc_ptr, sizeof(*desc_ptr),
- DMA_TO_DEVICE);
- desc_ptr++;
- if (++num_descriptors_this_page >= vsg->descriptors_per_page) {
- num_descriptors_this_page = 0;
- desc_ptr = vsg->desc_pages[++cur_descriptor_page];
- }
- }
-
- num_desc++;
- cur_mem += remaining_len;
- cur_fb += remaining_len;
- }
-
- mem_addr += xfer->mem_stride;
- fb_addr += xfer->fb_stride;
- }
-
- if (mode == 1) {
- vsg->chain_start = next;
- vsg->state = dr_via_device_mapped;
- }
- vsg->num_desc = num_desc;
-}
-
-/*
- * Function that frees up all resources for a blit. It is usable even if the
- * blit info has only been partially built as long as the status enum is consistent
- * with the actual status of the used resources.
- */
-static void
-via_free_sg_info(struct pci_dev *pdev, drm_via_sg_info_t *vsg)
-{
- int i;
-
- switch (vsg->state) {
- case dr_via_device_mapped:
- via_unmap_blit_from_device(pdev, vsg);
- fallthrough;
- case dr_via_desc_pages_alloc:
- for (i = 0; i < vsg->num_desc_pages; ++i) {
- if (vsg->desc_pages[i] != NULL)
- free_page((unsigned long)vsg->desc_pages[i]);
- }
- kfree(vsg->desc_pages);
- fallthrough;
- case dr_via_pages_locked:
- unpin_user_pages_dirty_lock(vsg->pages, vsg->num_pages,
- (vsg->direction == DMA_FROM_DEVICE));
- fallthrough;
- case dr_via_pages_alloc:
- vfree(vsg->pages);
- fallthrough;
- default:
- vsg->state = dr_via_sg_init;
- }
- vfree(vsg->bounce_buffer);
- vsg->bounce_buffer = NULL;
- vsg->free_on_sequence = 0;
-}
-
-/*
- * Fire a blit engine.
- */
-static void
-via_fire_dmablit(struct drm_device *dev, drm_via_sg_info_t *vsg, int engine)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-
- via_write(dev_priv, VIA_PCI_DMA_MAR0 + engine*0x10, 0);
- via_write(dev_priv, VIA_PCI_DMA_DAR0 + engine*0x10, 0);
- via_write(dev_priv, VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_DD | VIA_DMA_CSR_TD |
- VIA_DMA_CSR_DE);
- via_write(dev_priv, VIA_PCI_DMA_MR0 + engine*0x04, VIA_DMA_MR_CM | VIA_DMA_MR_TDIE);
- via_write(dev_priv, VIA_PCI_DMA_BCR0 + engine*0x10, 0);
- via_write(dev_priv, VIA_PCI_DMA_DPR0 + engine*0x10, vsg->chain_start);
- wmb();
- via_write(dev_priv, VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_DE | VIA_DMA_CSR_TS);
- via_read(dev_priv, VIA_PCI_DMA_CSR0 + engine*0x04);
-}
-
-/*
- * Obtain a page pointer array and lock all pages into system memory. A segmentation violation will
- * occur here if the calling user does not have access to the submitted address.
- */
-static int
-via_lock_all_dma_pages(drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer)
-{
- int ret;
- unsigned long first_pfn = VIA_PFN(xfer->mem_addr);
- vsg->num_pages = VIA_PFN(xfer->mem_addr + (xfer->num_lines * xfer->mem_stride - 1)) -
- first_pfn + 1;
-
- vsg->pages = vzalloc(array_size(sizeof(struct page *), vsg->num_pages));
- if (NULL == vsg->pages)
- return -ENOMEM;
- ret = pin_user_pages_fast((unsigned long)xfer->mem_addr,
- vsg->num_pages,
- vsg->direction == DMA_FROM_DEVICE ? FOLL_WRITE : 0,
- vsg->pages);
- if (ret != vsg->num_pages) {
- if (ret < 0)
- return ret;
- vsg->state = dr_via_pages_locked;
- return -EINVAL;
- }
- vsg->state = dr_via_pages_locked;
- DRM_DEBUG("DMA pages locked\n");
- return 0;
-}
-
-/*
- * Allocate DMA capable memory for the blit descriptor chain, and an array that keeps track of the
- * pages we allocate. We don't want to use kmalloc for the descriptor chain because it may be
- * quite large for some blits, and pages don't need to be contiguous.
- */
-static int
-via_alloc_desc_pages(drm_via_sg_info_t *vsg)
-{
- int i;
-
- vsg->descriptors_per_page = PAGE_SIZE / sizeof(drm_via_descriptor_t);
- vsg->num_desc_pages = (vsg->num_desc + vsg->descriptors_per_page - 1) /
- vsg->descriptors_per_page;
-
- if (NULL == (vsg->desc_pages = kcalloc(vsg->num_desc_pages, sizeof(void *), GFP_KERNEL)))
- return -ENOMEM;
-
- vsg->state = dr_via_desc_pages_alloc;
- for (i = 0; i < vsg->num_desc_pages; ++i) {
- if (NULL == (vsg->desc_pages[i] =
- (drm_via_descriptor_t *) __get_free_page(GFP_KERNEL)))
- return -ENOMEM;
- }
- DRM_DEBUG("Allocated %d pages for %d descriptors.\n", vsg->num_desc_pages,
- vsg->num_desc);
- return 0;
-}
-
-static void
-via_abort_dmablit(struct drm_device *dev, int engine)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-
- via_write(dev_priv, VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_TA);
-}
-
-static void
-via_dmablit_engine_off(struct drm_device *dev, int engine)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
-
- via_write(dev_priv, VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_TD | VIA_DMA_CSR_DD);
-}
-
-/*
- * The dmablit part of the IRQ handler. Trying to do only reasonably fast things here.
- * The rest, like unmapping and freeing memory for done blits is done in a separate workqueue
- * task. Basically the task of the interrupt handler is to submit a new blit to the engine, while
- * the workqueue task takes care of processing associated with the old blit.
- */
-static void
-via_dmablit_handler(struct drm_device *dev, int engine, int from_irq)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
- drm_via_blitq_t *blitq = dev_priv->blit_queues + engine;
- int cur;
- int done_transfer;
- unsigned long irqsave = 0;
- uint32_t status = 0;
-
- DRM_DEBUG("DMA blit handler called. engine = %d, from_irq = %d, blitq = 0x%lx\n",
- engine, from_irq, (unsigned long) blitq);
-
- if (from_irq)
- spin_lock(&blitq->blit_lock);
- else
- spin_lock_irqsave(&blitq->blit_lock, irqsave);
-
- done_transfer = blitq->is_active &&
- ((status = via_read(dev_priv, VIA_PCI_DMA_CSR0 + engine*0x04)) & VIA_DMA_CSR_TD);
- done_transfer = done_transfer || (blitq->aborting && !(status & VIA_DMA_CSR_DE));
-
- cur = blitq->cur;
- if (done_transfer) {
-
- blitq->blits[cur]->aborted = blitq->aborting;
- blitq->done_blit_handle++;
- wake_up(blitq->blit_queue + cur);
-
- cur++;
- if (cur >= VIA_NUM_BLIT_SLOTS)
- cur = 0;
- blitq->cur = cur;
-
- /*
- * Clear transfer done flag.
- */
-
- via_write(dev_priv, VIA_PCI_DMA_CSR0 + engine*0x04, VIA_DMA_CSR_TD);
-
- blitq->is_active = 0;
- blitq->aborting = 0;
- schedule_work(&blitq->wq);
-
- } else if (blitq->is_active && time_after_eq(jiffies, blitq->end)) {
-
- /*
- * Abort transfer after one second.
- */
-
- via_abort_dmablit(dev, engine);
- blitq->aborting = 1;
- blitq->end = jiffies + HZ;
- }
-
- if (!blitq->is_active) {
- if (blitq->num_outstanding) {
- via_fire_dmablit(dev, blitq->blits[cur], engine);
- blitq->is_active = 1;
- blitq->cur = cur;
- blitq->num_outstanding--;
- blitq->end = jiffies + HZ;
- if (!timer_pending(&blitq->poll_timer))
- mod_timer(&blitq->poll_timer, jiffies + 1);
- } else {
- if (timer_pending(&blitq->poll_timer))
- del_timer(&blitq->poll_timer);
- via_dmablit_engine_off(dev, engine);
- }
- }
-
- if (from_irq)
- spin_unlock(&blitq->blit_lock);
- else
- spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-}
-
-/*
- * Check whether this blit is still active, performing necessary locking.
- */
-static int
-via_dmablit_active(drm_via_blitq_t *blitq, int engine, uint32_t handle, wait_queue_head_t **queue)
-{
- unsigned long irqsave;
- uint32_t slot;
- int active;
-
- spin_lock_irqsave(&blitq->blit_lock, irqsave);
-
- /*
- * Allow for handle wraparounds.
- */
-
- active = ((blitq->done_blit_handle - handle) > (1 << 23)) &&
- ((blitq->cur_blit_handle - handle) <= (1 << 23));
-
- if (queue && active) {
- slot = handle - blitq->done_blit_handle + blitq->cur - 1;
- if (slot >= VIA_NUM_BLIT_SLOTS)
- slot -= VIA_NUM_BLIT_SLOTS;
- *queue = blitq->blit_queue + slot;
- }
-
- spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-
- return active;
-}
-
-/*
- * Sync. Wait for at least three seconds for the blit to be performed.
- */
-static int
-via_dmablit_sync(struct drm_device *dev, uint32_t handle, int engine)
-{
-
- drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
- drm_via_blitq_t *blitq = dev_priv->blit_queues + engine;
- wait_queue_head_t *queue;
- int ret = 0;
-
- if (via_dmablit_active(blitq, engine, handle, &queue)) {
- VIA_WAIT_ON(ret, *queue, 3 * HZ,
- !via_dmablit_active(blitq, engine, handle, NULL));
- }
- DRM_DEBUG("DMA blit sync handle 0x%x engine %d returned %d\n",
- handle, engine, ret);
-
- return ret;
-}
-
-/*
- * A timer that regularly polls the blit engine in cases where we don't have interrupts:
- * a) Broken hardware (typically those that don't have any video capture facility).
- * b) Blit abort. The hardware doesn't send an interrupt when a blit is aborted.
- * The timer and hardware IRQ's can and do work in parallel. If the hardware has
- * irqs, it will shorten the latency somewhat.
- */
-static void
-via_dmablit_timer(struct timer_list *t)
-{
- drm_via_blitq_t *blitq = from_timer(blitq, t, poll_timer);
- struct drm_device *dev = blitq->dev;
- int engine = (int)
- (blitq - ((drm_via_private_t *)dev->dev_private)->blit_queues);
-
- DRM_DEBUG("Polling timer called for engine %d, jiffies %lu\n", engine,
- (unsigned long) jiffies);
-
- via_dmablit_handler(dev, engine, 0);
-
- if (!timer_pending(&blitq->poll_timer)) {
- mod_timer(&blitq->poll_timer, jiffies + 1);
-
- /*
- * Rerun handler to delete timer if engines are off, and
- * to shorten abort latency. This is a little nasty.
- */
-
- via_dmablit_handler(dev, engine, 0);
-
- }
-}
-
-/*
- * Workqueue task that frees data and mappings associated with a blit.
- * Also wakes up waiting processes. Each of these tasks handles one
- * blit engine only and may not be called on each interrupt.
- */
-static void
-via_dmablit_workqueue(struct work_struct *work)
-{
- drm_via_blitq_t *blitq = container_of(work, drm_via_blitq_t, wq);
- struct drm_device *dev = blitq->dev;
- struct pci_dev *pdev = to_pci_dev(dev->dev);
- unsigned long irqsave;
- drm_via_sg_info_t *cur_sg;
- int cur_released;
-
-
- DRM_DEBUG("Workqueue task called for blit engine %ld\n", (unsigned long)
- (blitq - ((drm_via_private_t *)dev->dev_private)->blit_queues));
-
- spin_lock_irqsave(&blitq->blit_lock, irqsave);
-
- while (blitq->serviced != blitq->cur) {
-
- cur_released = blitq->serviced++;
-
- DRM_DEBUG("Releasing blit slot %d\n", cur_released);
-
- if (blitq->serviced >= VIA_NUM_BLIT_SLOTS)
- blitq->serviced = 0;
-
- cur_sg = blitq->blits[cur_released];
- blitq->num_free++;
-
- spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-
- wake_up(&blitq->busy_queue);
-
- via_free_sg_info(pdev, cur_sg);
- kfree(cur_sg);
-
- spin_lock_irqsave(&blitq->blit_lock, irqsave);
- }
-
- spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-}
-
-/*
- * Init all blit engines. Currently we use two, but some hardware have 4.
- */
-static void
-via_init_dmablit(struct drm_device *dev)
-{
- int i, j;
- drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
- struct pci_dev *pdev = to_pci_dev(dev->dev);
- drm_via_blitq_t *blitq;
-
- pci_set_master(pdev);
-
- for (i = 0; i < VIA_NUM_BLIT_ENGINES; ++i) {
- blitq = dev_priv->blit_queues + i;
- blitq->dev = dev;
- blitq->cur_blit_handle = 0;
- blitq->done_blit_handle = 0;
- blitq->head = 0;
- blitq->cur = 0;
- blitq->serviced = 0;
- blitq->num_free = VIA_NUM_BLIT_SLOTS - 1;
- blitq->num_outstanding = 0;
- blitq->is_active = 0;
- blitq->aborting = 0;
- spin_lock_init(&blitq->blit_lock);
- for (j = 0; j < VIA_NUM_BLIT_SLOTS; ++j)
- init_waitqueue_head(blitq->blit_queue + j);
- init_waitqueue_head(&blitq->busy_queue);
- INIT_WORK(&blitq->wq, via_dmablit_workqueue);
- timer_setup(&blitq->poll_timer, via_dmablit_timer, 0);
- }
-}
-
-/*
- * Build all info and do all mappings required for a blit.
- */
-static int
-via_build_sg_info(struct drm_device *dev, drm_via_sg_info_t *vsg, drm_via_dmablit_t *xfer)
-{
- struct pci_dev *pdev = to_pci_dev(dev->dev);
- int draw = xfer->to_fb;
- int ret = 0;
-
- vsg->direction = (draw) ? DMA_TO_DEVICE : DMA_FROM_DEVICE;
- vsg->bounce_buffer = NULL;
-
- vsg->state = dr_via_sg_init;
-
- if (xfer->num_lines <= 0 || xfer->line_length <= 0) {
- DRM_ERROR("Zero size bitblt.\n");
- return -EINVAL;
- }
-
- /*
- * Below check is a driver limitation, not a hardware one. We
- * don't want to lock unused pages, and don't want to incoporate the
- * extra logic of avoiding them. Make sure there are no.
- * (Not a big limitation anyway.)
- */
-
- if ((xfer->mem_stride - xfer->line_length) > 2*PAGE_SIZE) {
- DRM_ERROR("Too large system memory stride. Stride: %d, "
- "Length: %d\n", xfer->mem_stride, xfer->line_length);
- return -EINVAL;
- }
-
- if ((xfer->mem_stride == xfer->line_length) &&
- (xfer->fb_stride == xfer->line_length)) {
- xfer->mem_stride *= xfer->num_lines;
- xfer->line_length = xfer->mem_stride;
- xfer->fb_stride = xfer->mem_stride;
- xfer->num_lines = 1;
- }
-
- /*
- * Don't lock an arbitrary large number of pages, since that causes a
- * DOS security hole.
- */
-
- if (xfer->num_lines > 2048 || (xfer->num_lines*xfer->mem_stride > (2048*2048*4))) {
- DRM_ERROR("Too large PCI DMA bitblt.\n");
- return -EINVAL;
- }
-
- /*
- * we allow a negative fb stride to allow flipping of images in
- * transfer.
- */
-
- if (xfer->mem_stride < xfer->line_length ||
- abs(xfer->fb_stride) < xfer->line_length) {
- DRM_ERROR("Invalid frame-buffer / memory stride.\n");
- return -EINVAL;
- }
-
- /*
- * A hardware bug seems to be worked around if system memory addresses start on
- * 16 byte boundaries. This seems a bit restrictive however. VIA is contacted
- * about this. Meanwhile, impose the following restrictions:
- */
-
-#ifdef VIA_BUGFREE
- if ((((unsigned long)xfer->mem_addr & 3) != ((unsigned long)xfer->fb_addr & 3)) ||
- ((xfer->num_lines > 1) && ((xfer->mem_stride & 3) != (xfer->fb_stride & 3)))) {
- DRM_ERROR("Invalid DRM bitblt alignment.\n");
- return -EINVAL;
- }
-#else
- if ((((unsigned long)xfer->mem_addr & 15) ||
- ((unsigned long)xfer->fb_addr & 3)) ||
- ((xfer->num_lines > 1) &&
- ((xfer->mem_stride & 15) || (xfer->fb_stride & 3)))) {
- DRM_ERROR("Invalid DRM bitblt alignment.\n");
- return -EINVAL;
- }
-#endif
-
- if (0 != (ret = via_lock_all_dma_pages(vsg, xfer))) {
- DRM_ERROR("Could not lock DMA pages.\n");
- via_free_sg_info(pdev, vsg);
- return ret;
- }
-
- via_map_blit_for_device(pdev, xfer, vsg, 0);
- if (0 != (ret = via_alloc_desc_pages(vsg))) {
- DRM_ERROR("Could not allocate DMA descriptor pages.\n");
- via_free_sg_info(pdev, vsg);
- return ret;
- }
- via_map_blit_for_device(pdev, xfer, vsg, 1);
-
- return 0;
-}
-
-/*
- * Reserve one free slot in the blit queue. Will wait for one second for one
- * to become available. Otherwise -EBUSY is returned.
- */
-static int
-via_dmablit_grab_slot(drm_via_blitq_t *blitq, int engine)
-{
- int ret = 0;
- unsigned long irqsave;
-
- DRM_DEBUG("Num free is %d\n", blitq->num_free);
- spin_lock_irqsave(&blitq->blit_lock, irqsave);
- while (blitq->num_free == 0) {
- spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-
- VIA_WAIT_ON(ret, blitq->busy_queue, HZ, blitq->num_free > 0);
- if (ret)
- return (-EINTR == ret) ? -EAGAIN : ret;
-
- spin_lock_irqsave(&blitq->blit_lock, irqsave);
- }
-
- blitq->num_free--;
- spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
-
- return 0;
-}
-
-/*
- * Hand back a free slot if we changed our mind.
- */
-static void
-via_dmablit_release_slot(drm_via_blitq_t *blitq)
-{
- unsigned long irqsave;
-
- spin_lock_irqsave(&blitq->blit_lock, irqsave);
- blitq->num_free++;
- spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
- wake_up(&blitq->busy_queue);
-}
-
-/*
- * Grab a free slot. Build blit info and queue a blit.
- */
-static int
-via_dmablit(struct drm_device *dev, drm_via_dmablit_t *xfer)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *)dev->dev_private;
- drm_via_sg_info_t *vsg;
- drm_via_blitq_t *blitq;
- int ret;
- int engine;
- unsigned long irqsave;
-
- if (dev_priv == NULL) {
- DRM_ERROR("Called without initialization.\n");
- return -EINVAL;
- }
-
- engine = (xfer->to_fb) ? 0 : 1;
- blitq = dev_priv->blit_queues + engine;
- if (0 != (ret = via_dmablit_grab_slot(blitq, engine)))
- return ret;
- if (NULL == (vsg = kmalloc(sizeof(*vsg), GFP_KERNEL))) {
- via_dmablit_release_slot(blitq);
- return -ENOMEM;
- }
- if (0 != (ret = via_build_sg_info(dev, vsg, xfer))) {
- via_dmablit_release_slot(blitq);
- kfree(vsg);
- return ret;
- }
- spin_lock_irqsave(&blitq->blit_lock, irqsave);
-
- blitq->blits[blitq->head++] = vsg;
- if (blitq->head >= VIA_NUM_BLIT_SLOTS)
- blitq->head = 0;
- blitq->num_outstanding++;
- xfer->sync.sync_handle = ++blitq->cur_blit_handle;
-
- spin_unlock_irqrestore(&blitq->blit_lock, irqsave);
- xfer->sync.engine = engine;
-
- via_dmablit_handler(dev, engine, 0);
-
- return 0;
-}
-
-/*
- * Sync on a previously submitted blit. Note that the X server use signals extensively, and
- * that there is a very big probability that this IOCTL will be interrupted by a signal. In that
- * case it returns with -EAGAIN for the signal to be delivered.
- * The caller should then reissue the IOCTL. This is similar to what is being done for drmGetLock().
- */
-static int
-via_dma_blit_sync(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_blitsync_t *sync = data;
- int err;
-
- if (sync->engine >= VIA_NUM_BLIT_ENGINES)
- return -EINVAL;
-
- err = via_dmablit_sync(dev, sync->sync_handle, sync->engine);
-
- if (-EINTR == err)
- err = -EAGAIN;
-
- return err;
-}
-
-/*
- * Queue a blit and hand back a handle to be used for sync. This IOCTL may be interrupted by a signal
- * while waiting for a free slot in the blit queue. In that case it returns with -EAGAIN and should
- * be reissued. See the above IOCTL code.
- */
-static int
-via_dma_blit(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_dmablit_t *xfer = data;
- int err;
-
- err = via_dmablit(dev, xfer);
-
- return err;
-}
-
-static u32 via_get_vblank_counter(struct drm_device *dev, unsigned int pipe)
-{
- drm_via_private_t *dev_priv = dev->dev_private;
-
- if (pipe != 0)
- return 0;
-
- return atomic_read(&dev_priv->vbl_received);
-}
-
-static irqreturn_t via_driver_irq_handler(int irq, void *arg)
-{
- struct drm_device *dev = (struct drm_device *) arg;
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- u32 status;
- int handled = 0;
- ktime_t cur_vblank;
- drm_via_irq_t *cur_irq = dev_priv->via_irqs;
- int i;
-
- status = via_read(dev_priv, VIA_REG_INTERRUPT);
- if (status & VIA_IRQ_VBLANK_PENDING) {
- atomic_inc(&dev_priv->vbl_received);
- if (!(atomic_read(&dev_priv->vbl_received) & 0x0F)) {
- cur_vblank = ktime_get();
- if (dev_priv->last_vblank_valid) {
- dev_priv->nsec_per_vblank =
- ktime_sub(cur_vblank,
- dev_priv->last_vblank) >> 4;
- }
- dev_priv->last_vblank = cur_vblank;
- dev_priv->last_vblank_valid = 1;
- }
- if (!(atomic_read(&dev_priv->vbl_received) & 0xFF)) {
- DRM_DEBUG("nsec per vblank is: %llu\n",
- ktime_to_ns(dev_priv->nsec_per_vblank));
- }
- drm_handle_vblank(dev, 0);
- handled = 1;
- }
-
- for (i = 0; i < dev_priv->num_irqs; ++i) {
- if (status & cur_irq->pending_mask) {
- atomic_inc(&cur_irq->irq_received);
- wake_up(&cur_irq->irq_queue);
- handled = 1;
- if (dev_priv->irq_map[drm_via_irq_dma0_td] == i)
- via_dmablit_handler(dev, 0, 1);
- else if (dev_priv->irq_map[drm_via_irq_dma1_td] == i)
- via_dmablit_handler(dev, 1, 1);
- }
- cur_irq++;
- }
-
- /* Acknowledge interrupts */
- via_write(dev_priv, VIA_REG_INTERRUPT, status);
-
-
- if (handled)
- return IRQ_HANDLED;
- else
- return IRQ_NONE;
-}
-
-static __inline__ void viadrv_acknowledge_irqs(drm_via_private_t *dev_priv)
-{
- u32 status;
-
- if (dev_priv) {
- /* Acknowledge interrupts */
- status = via_read(dev_priv, VIA_REG_INTERRUPT);
- via_write(dev_priv, VIA_REG_INTERRUPT, status |
- dev_priv->irq_pending_mask);
- }
-}
-
-static int via_enable_vblank(struct drm_device *dev, unsigned int pipe)
-{
- drm_via_private_t *dev_priv = dev->dev_private;
- u32 status;
-
- if (pipe != 0) {
- DRM_ERROR("%s: bad crtc %u\n", __func__, pipe);
- return -EINVAL;
- }
-
- status = via_read(dev_priv, VIA_REG_INTERRUPT);
- via_write(dev_priv, VIA_REG_INTERRUPT, status | VIA_IRQ_VBLANK_ENABLE);
-
- via_write8(dev_priv, 0x83d4, 0x11);
- via_write8_mask(dev_priv, 0x83d5, 0x30, 0x30);
-
- return 0;
-}
-
-static void via_disable_vblank(struct drm_device *dev, unsigned int pipe)
-{
- drm_via_private_t *dev_priv = dev->dev_private;
- u32 status;
-
- status = via_read(dev_priv, VIA_REG_INTERRUPT);
- via_write(dev_priv, VIA_REG_INTERRUPT, status & ~VIA_IRQ_VBLANK_ENABLE);
-
- via_write8(dev_priv, 0x83d4, 0x11);
- via_write8_mask(dev_priv, 0x83d5, 0x30, 0);
-
- if (pipe != 0)
- DRM_ERROR("%s: bad crtc %u\n", __func__, pipe);
-}
-
-static int
-via_driver_irq_wait(struct drm_device *dev, unsigned int irq, int force_sequence,
- unsigned int *sequence)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- unsigned int cur_irq_sequence;
- drm_via_irq_t *cur_irq;
- int ret = 0;
- maskarray_t *masks;
- int real_irq;
-
- DRM_DEBUG("\n");
-
- if (!dev_priv) {
- DRM_ERROR("called with no initialization\n");
- return -EINVAL;
- }
-
- if (irq >= drm_via_irq_num) {
- DRM_ERROR("Trying to wait on unknown irq %d\n", irq);
- return -EINVAL;
- }
-
- real_irq = dev_priv->irq_map[irq];
-
- if (real_irq < 0) {
- DRM_ERROR("Video IRQ %d not available on this hardware.\n",
- irq);
- return -EINVAL;
- }
-
- masks = dev_priv->irq_masks;
- cur_irq = dev_priv->via_irqs + real_irq;
-
- if (masks[real_irq][2] && !force_sequence) {
- VIA_WAIT_ON(ret, cur_irq->irq_queue, 3 * HZ,
- ((via_read(dev_priv, masks[irq][2]) & masks[irq][3]) ==
- masks[irq][4]));
- cur_irq_sequence = atomic_read(&cur_irq->irq_received);
- } else {
- VIA_WAIT_ON(ret, cur_irq->irq_queue, 3 * HZ,
- (((cur_irq_sequence =
- atomic_read(&cur_irq->irq_received)) -
- *sequence) <= (1 << 23)));
- }
- *sequence = cur_irq_sequence;
- return ret;
-}
-
-
-/*
- * drm_dma.h hooks
- */
-
-static void via_driver_irq_preinstall(struct drm_device *dev)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- u32 status;
- drm_via_irq_t *cur_irq;
- int i;
-
- DRM_DEBUG("dev_priv: %p\n", dev_priv);
- if (dev_priv) {
- cur_irq = dev_priv->via_irqs;
-
- dev_priv->irq_enable_mask = VIA_IRQ_VBLANK_ENABLE;
- dev_priv->irq_pending_mask = VIA_IRQ_VBLANK_PENDING;
-
- if (dev_priv->chipset == VIA_PRO_GROUP_A ||
- dev_priv->chipset == VIA_DX9_0) {
- dev_priv->irq_masks = via_pro_group_a_irqs;
- dev_priv->num_irqs = via_num_pro_group_a;
- dev_priv->irq_map = via_irqmap_pro_group_a;
- } else {
- dev_priv->irq_masks = via_unichrome_irqs;
- dev_priv->num_irqs = via_num_unichrome;
- dev_priv->irq_map = via_irqmap_unichrome;
- }
-
- for (i = 0; i < dev_priv->num_irqs; ++i) {
- atomic_set(&cur_irq->irq_received, 0);
- cur_irq->enable_mask = dev_priv->irq_masks[i][0];
- cur_irq->pending_mask = dev_priv->irq_masks[i][1];
- init_waitqueue_head(&cur_irq->irq_queue);
- dev_priv->irq_enable_mask |= cur_irq->enable_mask;
- dev_priv->irq_pending_mask |= cur_irq->pending_mask;
- cur_irq++;
-
- DRM_DEBUG("Initializing IRQ %d\n", i);
- }
-
- dev_priv->last_vblank_valid = 0;
-
- /* Clear VSync interrupt regs */
- status = via_read(dev_priv, VIA_REG_INTERRUPT);
- via_write(dev_priv, VIA_REG_INTERRUPT, status &
- ~(dev_priv->irq_enable_mask));
-
- /* Clear bits if they're already high */
- viadrv_acknowledge_irqs(dev_priv);
- }
-}
-
-static int via_driver_irq_postinstall(struct drm_device *dev)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- u32 status;
-
- DRM_DEBUG("fun: %s\n", __func__);
- if (!dev_priv)
- return -EINVAL;
-
- status = via_read(dev_priv, VIA_REG_INTERRUPT);
- via_write(dev_priv, VIA_REG_INTERRUPT, status | VIA_IRQ_GLOBAL
- | dev_priv->irq_enable_mask);
-
- /* Some magic, oh for some data sheets ! */
- via_write8(dev_priv, 0x83d4, 0x11);
- via_write8_mask(dev_priv, 0x83d5, 0x30, 0x30);
-
- return 0;
-}
-
-static void via_driver_irq_uninstall(struct drm_device *dev)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- u32 status;
-
- DRM_DEBUG("\n");
- if (dev_priv) {
-
- /* Some more magic, oh for some data sheets ! */
-
- via_write8(dev_priv, 0x83d4, 0x11);
- via_write8_mask(dev_priv, 0x83d5, 0x30, 0);
-
- status = via_read(dev_priv, VIA_REG_INTERRUPT);
- via_write(dev_priv, VIA_REG_INTERRUPT, status &
- ~(VIA_IRQ_VBLANK_ENABLE | dev_priv->irq_enable_mask));
- }
-}
-
-static int via_wait_irq(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_irqwait_t *irqwait = data;
- struct timespec64 now;
- int ret = 0;
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- drm_via_irq_t *cur_irq = dev_priv->via_irqs;
- int force_sequence;
-
- if (irqwait->request.irq >= dev_priv->num_irqs) {
- DRM_ERROR("Trying to wait on unknown irq %d\n",
- irqwait->request.irq);
- return -EINVAL;
- }
-
- cur_irq += irqwait->request.irq;
-
- switch (irqwait->request.type & ~VIA_IRQ_FLAGS_MASK) {
- case VIA_IRQ_RELATIVE:
- irqwait->request.sequence +=
- atomic_read(&cur_irq->irq_received);
- irqwait->request.type &= ~_DRM_VBLANK_RELATIVE;
- break;
- case VIA_IRQ_ABSOLUTE:
- break;
- default:
- return -EINVAL;
- }
-
- if (irqwait->request.type & VIA_IRQ_SIGNAL) {
- DRM_ERROR("Signals on Via IRQs not implemented yet.\n");
- return -EINVAL;
- }
-
- force_sequence = (irqwait->request.type & VIA_IRQ_FORCE_SEQUENCE);
-
- ret = via_driver_irq_wait(dev, irqwait->request.irq, force_sequence,
- &irqwait->request.sequence);
- ktime_get_ts64(&now);
- irqwait->reply.tval_sec = now.tv_sec;
- irqwait->reply.tval_usec = now.tv_nsec / NSEC_PER_USEC;
-
- return ret;
-}
-
-static void via_init_futex(drm_via_private_t *dev_priv)
-{
- unsigned int i;
-
- DRM_DEBUG("\n");
-
- for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
- init_waitqueue_head(&(dev_priv->decoder_queue[i]));
- XVMCLOCKPTR(dev_priv->sarea_priv, i)->lock = 0;
- }
-}
-
-static void via_cleanup_futex(drm_via_private_t *dev_priv)
-{
-}
-
-static void via_release_futex(drm_via_private_t *dev_priv, int context)
-{
- unsigned int i;
- volatile int *lock;
-
- if (!dev_priv->sarea_priv)
- return;
-
- for (i = 0; i < VIA_NR_XVMC_LOCKS; ++i) {
- lock = (volatile int *)XVMCLOCKPTR(dev_priv->sarea_priv, i);
- if ((_DRM_LOCKING_CONTEXT(*lock) == context)) {
- if (_DRM_LOCK_IS_HELD(*lock)
- && (*lock & _DRM_LOCK_CONT)) {
- wake_up(&(dev_priv->decoder_queue[i]));
- }
- *lock = 0;
- }
- }
-}
-
-static int via_decoder_futex(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_futex_t *fx = data;
- volatile int *lock;
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- drm_via_sarea_t *sAPriv = dev_priv->sarea_priv;
- int ret = 0;
-
- DRM_DEBUG("\n");
-
- if (fx->lock >= VIA_NR_XVMC_LOCKS)
- return -EFAULT;
-
- lock = (volatile int *)XVMCLOCKPTR(sAPriv, fx->lock);
-
- switch (fx->func) {
- case VIA_FUTEX_WAIT:
- VIA_WAIT_ON(ret, dev_priv->decoder_queue[fx->lock],
- (fx->ms / 10) * (HZ / 100), *lock != fx->val);
- return ret;
- case VIA_FUTEX_WAKE:
- wake_up(&(dev_priv->decoder_queue[fx->lock]));
- return 0;
- }
- return 0;
-}
-
-static int via_agp_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_agp_t *agp = data;
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
-
- mutex_lock(&dev->struct_mutex);
- drm_mm_init(&dev_priv->agp_mm, 0, agp->size >> VIA_MM_ALIGN_SHIFT);
-
- dev_priv->agp_initialized = 1;
- dev_priv->agp_offset = agp->offset;
- mutex_unlock(&dev->struct_mutex);
-
- DRM_DEBUG("offset = %u, size = %u\n", agp->offset, agp->size);
- return 0;
-}
-
-static int via_fb_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_fb_t *fb = data;
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
-
- mutex_lock(&dev->struct_mutex);
- drm_mm_init(&dev_priv->vram_mm, 0, fb->size >> VIA_MM_ALIGN_SHIFT);
-
- dev_priv->vram_initialized = 1;
- dev_priv->vram_offset = fb->offset;
-
- mutex_unlock(&dev->struct_mutex);
- DRM_DEBUG("offset = %u, size = %u\n", fb->offset, fb->size);
-
- return 0;
-
-}
-
-static int via_final_context(struct drm_device *dev, int context)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
-
- via_release_futex(dev_priv, context);
-
- /* Linux specific until context tracking code gets ported to BSD */
- /* Last context, perform cleanup */
- if (list_is_singular(&dev->ctxlist)) {
- DRM_DEBUG("Last Context\n");
- drm_legacy_irq_uninstall(dev);
- via_cleanup_futex(dev_priv);
- via_do_cleanup_map(dev);
- }
- return 1;
-}
-
-static void via_lastclose(struct drm_device *dev)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
-
- if (!dev_priv)
- return;
-
- mutex_lock(&dev->struct_mutex);
- if (dev_priv->vram_initialized) {
- drm_mm_takedown(&dev_priv->vram_mm);
- dev_priv->vram_initialized = 0;
- }
- if (dev_priv->agp_initialized) {
- drm_mm_takedown(&dev_priv->agp_mm);
- dev_priv->agp_initialized = 0;
- }
- mutex_unlock(&dev->struct_mutex);
-}
-
-static int via_mem_alloc(struct drm_device *dev, void *data,
- struct drm_file *file)
-{
- drm_via_mem_t *mem = data;
- int retval = 0, user_key;
- struct via_memblock *item;
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- struct via_file_private *file_priv = file->driver_priv;
- unsigned long tmpSize;
-
- if (mem->type > VIA_MEM_AGP) {
- DRM_ERROR("Unknown memory type allocation\n");
- return -EINVAL;
- }
- mutex_lock(&dev->struct_mutex);
- if (0 == ((mem->type == VIA_MEM_VIDEO) ? dev_priv->vram_initialized :
- dev_priv->agp_initialized)) {
- mutex_unlock(&dev->struct_mutex);
- DRM_ERROR
- ("Attempt to allocate from uninitialized memory manager.\n");
- return -EINVAL;
- }
-
- item = kzalloc(sizeof(*item), GFP_KERNEL);
- if (!item) {
- retval = -ENOMEM;
- goto fail_alloc;
- }
-
- tmpSize = (mem->size + VIA_MM_ALIGN_MASK) >> VIA_MM_ALIGN_SHIFT;
- if (mem->type == VIA_MEM_AGP)
- retval = drm_mm_insert_node(&dev_priv->agp_mm,
- &item->mm_node,
- tmpSize);
- else
- retval = drm_mm_insert_node(&dev_priv->vram_mm,
- &item->mm_node,
- tmpSize);
- if (retval)
- goto fail_alloc;
-
- retval = idr_alloc(&dev_priv->object_idr, item, 1, 0, GFP_KERNEL);
- if (retval < 0)
- goto fail_idr;
- user_key = retval;
-
- list_add(&item->owner_list, &file_priv->obj_list);
- mutex_unlock(&dev->struct_mutex);
-
- mem->offset = ((mem->type == VIA_MEM_VIDEO) ?
- dev_priv->vram_offset : dev_priv->agp_offset) +
- ((item->mm_node.start) << VIA_MM_ALIGN_SHIFT);
- mem->index = user_key;
-
- return 0;
-
-fail_idr:
- drm_mm_remove_node(&item->mm_node);
-fail_alloc:
- kfree(item);
- mutex_unlock(&dev->struct_mutex);
-
- mem->offset = 0;
- mem->size = 0;
- mem->index = 0;
- DRM_DEBUG("Video memory allocation failed\n");
-
- return retval;
-}
-
-static int via_mem_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_private_t *dev_priv = dev->dev_private;
- drm_via_mem_t *mem = data;
- struct via_memblock *obj;
-
- mutex_lock(&dev->struct_mutex);
- obj = idr_find(&dev_priv->object_idr, mem->index);
- if (obj == NULL) {
- mutex_unlock(&dev->struct_mutex);
- return -EINVAL;
- }
-
- idr_remove(&dev_priv->object_idr, mem->index);
- list_del(&obj->owner_list);
- drm_mm_remove_node(&obj->mm_node);
- kfree(obj);
- mutex_unlock(&dev->struct_mutex);
-
- DRM_DEBUG("free = 0x%lx\n", mem->index);
-
- return 0;
-}
-
-
-static void via_reclaim_buffers_locked(struct drm_device *dev,
- struct drm_file *file)
-{
- struct via_file_private *file_priv = file->driver_priv;
- struct via_memblock *entry, *next;
-
- if (!(dev->master && file->master->lock.hw_lock))
- return;
-
- drm_legacy_idlelock_take(&file->master->lock);
-
- mutex_lock(&dev->struct_mutex);
- if (list_empty(&file_priv->obj_list)) {
- mutex_unlock(&dev->struct_mutex);
- drm_legacy_idlelock_release(&file->master->lock);
-
- return;
- }
-
- via_driver_dma_quiescent(dev);
-
- list_for_each_entry_safe(entry, next, &file_priv->obj_list,
- owner_list) {
- list_del(&entry->owner_list);
- drm_mm_remove_node(&entry->mm_node);
- kfree(entry);
- }
- mutex_unlock(&dev->struct_mutex);
-
- drm_legacy_idlelock_release(&file->master->lock);
-
- return;
-}
-
-static int via_do_init_map(struct drm_device *dev, drm_via_init_t *init)
-{
- drm_via_private_t *dev_priv = dev->dev_private;
-
- DRM_DEBUG("\n");
-
- dev_priv->sarea = drm_legacy_getsarea(dev);
- if (!dev_priv->sarea) {
- DRM_ERROR("could not find sarea!\n");
- dev->dev_private = (void *)dev_priv;
- via_do_cleanup_map(dev);
- return -EINVAL;
- }
-
- dev_priv->fb = drm_legacy_findmap(dev, init->fb_offset);
- if (!dev_priv->fb) {
- DRM_ERROR("could not find framebuffer!\n");
- dev->dev_private = (void *)dev_priv;
- via_do_cleanup_map(dev);
- return -EINVAL;
- }
- dev_priv->mmio = drm_legacy_findmap(dev, init->mmio_offset);
- if (!dev_priv->mmio) {
- DRM_ERROR("could not find mmio region!\n");
- dev->dev_private = (void *)dev_priv;
- via_do_cleanup_map(dev);
- return -EINVAL;
- }
-
- dev_priv->sarea_priv =
- (drm_via_sarea_t *) ((u8 *) dev_priv->sarea->handle +
- init->sarea_priv_offset);
-
- dev_priv->agpAddr = init->agpAddr;
-
- via_init_futex(dev_priv);
-
- via_init_dmablit(dev);
-
- dev->dev_private = (void *)dev_priv;
- return 0;
-}
-
-int via_do_cleanup_map(struct drm_device *dev)
-{
- via_dma_cleanup(dev);
-
- return 0;
-}
-
-static int via_map_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_init_t *init = data;
-
- DRM_DEBUG("\n");
-
- switch (init->func) {
- case VIA_INIT_MAP:
- return via_do_init_map(dev, init);
- case VIA_CLEANUP_MAP:
- return via_do_cleanup_map(dev);
- }
-
- return -EINVAL;
-}
-
-static int via_driver_load(struct drm_device *dev, unsigned long chipset)
-{
- struct pci_dev *pdev = to_pci_dev(dev->dev);
- drm_via_private_t *dev_priv;
- int ret = 0;
-
- dev_priv = kzalloc(sizeof(drm_via_private_t), GFP_KERNEL);
- if (dev_priv == NULL)
- return -ENOMEM;
-
- idr_init_base(&dev_priv->object_idr, 1);
- dev->dev_private = (void *)dev_priv;
-
- dev_priv->chipset = chipset;
-
- pci_set_master(pdev);
-
- ret = drm_vblank_init(dev, 1);
- if (ret) {
- kfree(dev_priv);
- return ret;
- }
-
- return 0;
-}
-
-static void via_driver_unload(struct drm_device *dev)
-{
- drm_via_private_t *dev_priv = dev->dev_private;
-
- idr_destroy(&dev_priv->object_idr);
-
- kfree(dev_priv);
-}
-
-static void via_cmdbuf_start(drm_via_private_t *dev_priv);
-static void via_cmdbuf_pause(drm_via_private_t *dev_priv);
-static void via_cmdbuf_reset(drm_via_private_t *dev_priv);
-static void via_cmdbuf_rewind(drm_via_private_t *dev_priv);
-static int via_wait_idle(drm_via_private_t *dev_priv);
-static void via_pad_cache(drm_via_private_t *dev_priv, int qwords);
-
-/*
- * Free space in command buffer.
- */
-
-static uint32_t via_cmdbuf_space(drm_via_private_t *dev_priv)
-{
- uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
- uint32_t hw_addr = *(dev_priv->hw_addr_ptr) - agp_base;
-
- return ((hw_addr <= dev_priv->dma_low) ?
- (dev_priv->dma_high + hw_addr - dev_priv->dma_low) :
- (hw_addr - dev_priv->dma_low));
-}
-
-/*
- * How much does the command regulator lag behind?
- */
-
-static uint32_t via_cmdbuf_lag(drm_via_private_t *dev_priv)
-{
- uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
- uint32_t hw_addr = *(dev_priv->hw_addr_ptr) - agp_base;
-
- return ((hw_addr <= dev_priv->dma_low) ?
- (dev_priv->dma_low - hw_addr) :
- (dev_priv->dma_wrap + dev_priv->dma_low - hw_addr));
-}
-
-/*
- * Check that the given size fits in the buffer, otherwise wait.
- */
-
-static inline int
-via_cmdbuf_wait(drm_via_private_t *dev_priv, unsigned int size)
-{
- uint32_t agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
- uint32_t cur_addr, hw_addr, next_addr;
- volatile uint32_t *hw_addr_ptr;
- uint32_t count;
- hw_addr_ptr = dev_priv->hw_addr_ptr;
- cur_addr = dev_priv->dma_low;
- next_addr = cur_addr + size + 512 * 1024;
- count = 1000000;
- do {
- hw_addr = *hw_addr_ptr - agp_base;
- if (count-- == 0) {
- DRM_ERROR
- ("via_cmdbuf_wait timed out hw %x cur_addr %x next_addr %x\n",
- hw_addr, cur_addr, next_addr);
- return -1;
- }
- if ((cur_addr < hw_addr) && (next_addr >= hw_addr))
- msleep(1);
- } while ((cur_addr < hw_addr) && (next_addr >= hw_addr));
- return 0;
-}
-
-/*
- * Checks whether buffer head has reach the end. Rewind the ring buffer
- * when necessary.
- *
- * Returns virtual pointer to ring buffer.
- */
-
-static inline uint32_t *via_check_dma(drm_via_private_t * dev_priv,
- unsigned int size)
-{
- if ((dev_priv->dma_low + size + 4 * CMDBUF_ALIGNMENT_SIZE) >
- dev_priv->dma_high) {
- via_cmdbuf_rewind(dev_priv);
- }
- if (via_cmdbuf_wait(dev_priv, size) != 0)
- return NULL;
-
- return (uint32_t *) (dev_priv->dma_ptr + dev_priv->dma_low);
-}
-
-int via_dma_cleanup(struct drm_device *dev)
-{
- if (dev->dev_private) {
- drm_via_private_t *dev_priv =
- (drm_via_private_t *) dev->dev_private;
-
- if (dev_priv->ring.virtual_start && dev_priv->mmio) {
- via_cmdbuf_reset(dev_priv);
-
- drm_legacy_ioremapfree(&dev_priv->ring.map, dev);
- dev_priv->ring.virtual_start = NULL;
- }
-
- }
-
- return 0;
-}
-
-static int via_initialize(struct drm_device *dev,
- drm_via_private_t *dev_priv,
- drm_via_dma_init_t *init)
-{
- if (!dev_priv || !dev_priv->mmio) {
- DRM_ERROR("via_dma_init called before via_map_init\n");
- return -EFAULT;
- }
-
- if (dev_priv->ring.virtual_start != NULL) {
- DRM_ERROR("called again without calling cleanup\n");
- return -EFAULT;
- }
-
- if (!dev->agp || !dev->agp->base) {
- DRM_ERROR("called with no agp memory available\n");
- return -EFAULT;
- }
-
- if (dev_priv->chipset == VIA_DX9_0) {
- DRM_ERROR("AGP DMA is not supported on this chip\n");
- return -EINVAL;
- }
-
- dev_priv->ring.map.offset = dev->agp->base + init->offset;
- dev_priv->ring.map.size = init->size;
- dev_priv->ring.map.type = 0;
- dev_priv->ring.map.flags = 0;
- dev_priv->ring.map.mtrr = 0;
-
- drm_legacy_ioremap(&dev_priv->ring.map, dev);
-
- if (dev_priv->ring.map.handle == NULL) {
- via_dma_cleanup(dev);
- DRM_ERROR("can not ioremap virtual address for"
- " ring buffer\n");
- return -ENOMEM;
- }
-
- dev_priv->ring.virtual_start = dev_priv->ring.map.handle;
-
- dev_priv->dma_ptr = dev_priv->ring.virtual_start;
- dev_priv->dma_low = 0;
- dev_priv->dma_high = init->size;
- dev_priv->dma_wrap = init->size;
- dev_priv->dma_offset = init->offset;
- dev_priv->last_pause_ptr = NULL;
- dev_priv->hw_addr_ptr =
- (volatile uint32_t *)((char *)dev_priv->mmio->handle +
- init->reg_pause_addr);
-
- via_cmdbuf_start(dev_priv);
-
- return 0;
-}
-
-static int via_dma_init(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_private_t *dev_priv = (drm_via_private_t *) dev->dev_private;
- drm_via_dma_init_t *init = data;
- int retcode = 0;
-
- switch (init->func) {
- case VIA_INIT_DMA:
- if (!capable(CAP_SYS_ADMIN))
- retcode = -EPERM;
- else
- retcode = via_initialize(dev, dev_priv, init);
- break;
- case VIA_CLEANUP_DMA:
- if (!capable(CAP_SYS_ADMIN))
- retcode = -EPERM;
- else
- retcode = via_dma_cleanup(dev);
- break;
- case VIA_DMA_INITIALIZED:
- retcode = (dev_priv->ring.virtual_start != NULL) ?
- 0 : -EFAULT;
- break;
- default:
- retcode = -EINVAL;
- break;
- }
-
- return retcode;
-}
-
-static int via_dispatch_cmdbuffer(struct drm_device *dev, drm_via_cmdbuffer_t *cmd)
-{
- drm_via_private_t *dev_priv;
- uint32_t *vb;
- int ret;
-
- dev_priv = (drm_via_private_t *) dev->dev_private;
-
- if (dev_priv->ring.virtual_start == NULL) {
- DRM_ERROR("called without initializing AGP ring buffer.\n");
- return -EFAULT;
- }
-
- if (cmd->size > VIA_PCI_BUF_SIZE)
- return -ENOMEM;
-
- if (copy_from_user(dev_priv->pci_buf, cmd->buf, cmd->size))
- return -EFAULT;
-
- /*
- * Running this function on AGP memory is dead slow. Therefore
- * we run it on a temporary cacheable system memory buffer and
- * copy it to AGP memory when ready.
- */
-
- if ((ret =
- via_verify_command_stream((uint32_t *) dev_priv->pci_buf,
- cmd->size, dev, 1))) {
- return ret;
- }
-
- vb = via_check_dma(dev_priv, (cmd->size < 0x100) ? 0x102 : cmd->size);
- if (vb == NULL)
- return -EAGAIN;
-
- memcpy(vb, dev_priv->pci_buf, cmd->size);
-
- dev_priv->dma_low += cmd->size;
-
- /*
- * Small submissions somehow stalls the CPU. (AGP cache effects?)
- * pad to greater size.
- */
-
- if (cmd->size < 0x100)
- via_pad_cache(dev_priv, (0x100 - cmd->size) >> 3);
- via_cmdbuf_pause(dev_priv);
-
- return 0;
-}
-
-int via_driver_dma_quiescent(struct drm_device *dev)
-{
- drm_via_private_t *dev_priv = dev->dev_private;
-
- if (!via_wait_idle(dev_priv))
- return -EBUSY;
- return 0;
-}
-
-static int via_flush_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
-
- LOCK_TEST_WITH_RETURN(dev, file_priv);
-
- return via_driver_dma_quiescent(dev);
-}
-
-static int via_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_cmdbuffer_t *cmdbuf = data;
- int ret;
-
- LOCK_TEST_WITH_RETURN(dev, file_priv);
-
- DRM_DEBUG("buf %p size %lu\n", cmdbuf->buf, cmdbuf->size);
-
- ret = via_dispatch_cmdbuffer(dev, cmdbuf);
- return ret;
-}
-
-static int via_dispatch_pci_cmdbuffer(struct drm_device *dev,
- drm_via_cmdbuffer_t *cmd)
-{
- drm_via_private_t *dev_priv = dev->dev_private;
- int ret;
-
- if (cmd->size > VIA_PCI_BUF_SIZE)
- return -ENOMEM;
- if (copy_from_user(dev_priv->pci_buf, cmd->buf, cmd->size))
- return -EFAULT;
-
- if ((ret =
- via_verify_command_stream((uint32_t *) dev_priv->pci_buf,
- cmd->size, dev, 0))) {
- return ret;
- }
-
- ret =
- via_parse_command_stream(dev, (const uint32_t *)dev_priv->pci_buf,
- cmd->size);
- return ret;
-}
-
-static int via_pci_cmdbuffer(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_cmdbuffer_t *cmdbuf = data;
- int ret;
-
- LOCK_TEST_WITH_RETURN(dev, file_priv);
-
- DRM_DEBUG("buf %p size %lu\n", cmdbuf->buf, cmdbuf->size);
-
- ret = via_dispatch_pci_cmdbuffer(dev, cmdbuf);
- return ret;
-}
-
-static inline uint32_t *via_align_buffer(drm_via_private_t *dev_priv,
- uint32_t * vb, int qw_count)
-{
- for (; qw_count > 0; --qw_count)
- VIA_OUT_RING_QW(HC_DUMMY, HC_DUMMY);
- return vb;
-}
-
-/*
- * This function is used internally by ring buffer management code.
- *
- * Returns virtual pointer to ring buffer.
- */
-static inline uint32_t *via_get_dma(drm_via_private_t *dev_priv)
-{
- return (uint32_t *) (dev_priv->dma_ptr + dev_priv->dma_low);
-}
-
-/*
- * Hooks a segment of data into the tail of the ring-buffer by
- * modifying the pause address stored in the buffer itself. If
- * the regulator has already paused, restart it.
- */
-static int via_hook_segment(drm_via_private_t *dev_priv,
- uint32_t pause_addr_hi, uint32_t pause_addr_lo,
- int no_pci_fire)
-{
- int paused, count;
- volatile uint32_t *paused_at = dev_priv->last_pause_ptr;
- uint32_t reader, ptr;
- uint32_t diff;
-
- paused = 0;
- via_flush_write_combine();
- (void) *(volatile uint32_t *)(via_get_dma(dev_priv) - 1);
-
- *paused_at = pause_addr_lo;
- via_flush_write_combine();
- (void) *paused_at;
-
- reader = *(dev_priv->hw_addr_ptr);
- ptr = ((volatile char *)paused_at - dev_priv->dma_ptr) +
- dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4;
-
- dev_priv->last_pause_ptr = via_get_dma(dev_priv) - 1;
-
- /*
- * If there is a possibility that the command reader will
- * miss the new pause address and pause on the old one,
- * In that case we need to program the new start address
- * using PCI.
- */
-
- diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
- count = 10000000;
- while (diff == 0 && count--) {
- paused = (via_read(dev_priv, 0x41c) & 0x80000000);
- if (paused)
- break;
- reader = *(dev_priv->hw_addr_ptr);
- diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
- }
-
- paused = via_read(dev_priv, 0x41c) & 0x80000000;
-
- if (paused && !no_pci_fire) {
- reader = *(dev_priv->hw_addr_ptr);
- diff = (uint32_t) (ptr - reader) - dev_priv->dma_diff;
- diff &= (dev_priv->dma_high - 1);
- if (diff != 0 && diff < (dev_priv->dma_high >> 1)) {
- DRM_ERROR("Paused at incorrect address. "
- "0x%08x, 0x%08x 0x%08x\n",
- ptr, reader, dev_priv->dma_diff);
- } else if (diff == 0) {
- /*
- * There is a concern that these writes may stall the PCI bus
- * if the GPU is not idle. However, idling the GPU first
- * doesn't make a difference.
- */
-
- via_write(dev_priv, VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
- via_write(dev_priv, VIA_REG_TRANSPACE, pause_addr_hi);
- via_write(dev_priv, VIA_REG_TRANSPACE, pause_addr_lo);
- via_read(dev_priv, VIA_REG_TRANSPACE);
- }
- }
- return paused;
-}
-
-static int via_wait_idle(drm_via_private_t *dev_priv)
-{
- int count = 10000000;
-
- while (!(via_read(dev_priv, VIA_REG_STATUS) & VIA_VR_QUEUE_BUSY) && --count)
- ;
-
- while (count && (via_read(dev_priv, VIA_REG_STATUS) &
- (VIA_CMD_RGTR_BUSY | VIA_2D_ENG_BUSY |
- VIA_3D_ENG_BUSY)))
- --count;
- return count;
-}
-
-static uint32_t *via_align_cmd(drm_via_private_t *dev_priv, uint32_t cmd_type,
- uint32_t addr, uint32_t *cmd_addr_hi,
- uint32_t *cmd_addr_lo, int skip_wait)
-{
- uint32_t agp_base;
- uint32_t cmd_addr, addr_lo, addr_hi;
- uint32_t *vb;
- uint32_t qw_pad_count;
-
- if (!skip_wait)
- via_cmdbuf_wait(dev_priv, 2 * CMDBUF_ALIGNMENT_SIZE);
-
- vb = via_get_dma(dev_priv);
- VIA_OUT_RING_QW(HC_HEADER2 | ((VIA_REG_TRANSET >> 2) << 12) |
- (VIA_REG_TRANSPACE >> 2), HC_ParaType_PreCR << 16);
- agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
- qw_pad_count = (CMDBUF_ALIGNMENT_SIZE >> 3) -
- ((dev_priv->dma_low & CMDBUF_ALIGNMENT_MASK) >> 3);
-
- cmd_addr = (addr) ? addr :
- agp_base + dev_priv->dma_low - 8 + (qw_pad_count << 3);
- addr_lo = ((HC_SubA_HAGPBpL << 24) | (cmd_type & HC_HAGPBpID_MASK) |
- (cmd_addr & HC_HAGPBpL_MASK));
- addr_hi = ((HC_SubA_HAGPBpH << 24) | (cmd_addr >> 24));
-
- vb = via_align_buffer(dev_priv, vb, qw_pad_count - 1);
- VIA_OUT_RING_QW(*cmd_addr_hi = addr_hi, *cmd_addr_lo = addr_lo);
- return vb;
-}
-
-static void via_cmdbuf_start(drm_via_private_t *dev_priv)
-{
- uint32_t pause_addr_lo, pause_addr_hi;
- uint32_t start_addr, start_addr_lo;
- uint32_t end_addr, end_addr_lo;
- uint32_t command;
- uint32_t agp_base;
- uint32_t ptr;
- uint32_t reader;
- int count;
-
- dev_priv->dma_low = 0;
-
- agp_base = dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr;
- start_addr = agp_base;
- end_addr = agp_base + dev_priv->dma_high;
-
- start_addr_lo = ((HC_SubA_HAGPBstL << 24) | (start_addr & 0xFFFFFF));
- end_addr_lo = ((HC_SubA_HAGPBendL << 24) | (end_addr & 0xFFFFFF));
- command = ((HC_SubA_HAGPCMNT << 24) | (start_addr >> 24) |
- ((end_addr & 0xff000000) >> 16));
-
- dev_priv->last_pause_ptr =
- via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0,
- &pause_addr_hi, &pause_addr_lo, 1) - 1;
-
- via_flush_write_combine();
- (void) *(volatile uint32_t *)dev_priv->last_pause_ptr;
-
- via_write(dev_priv, VIA_REG_TRANSET, (HC_ParaType_PreCR << 16));
- via_write(dev_priv, VIA_REG_TRANSPACE, command);
- via_write(dev_priv, VIA_REG_TRANSPACE, start_addr_lo);
- via_write(dev_priv, VIA_REG_TRANSPACE, end_addr_lo);
-
- via_write(dev_priv, VIA_REG_TRANSPACE, pause_addr_hi);
- via_write(dev_priv, VIA_REG_TRANSPACE, pause_addr_lo);
- wmb();
- via_write(dev_priv, VIA_REG_TRANSPACE, command | HC_HAGPCMNT_MASK);
- via_read(dev_priv, VIA_REG_TRANSPACE);
-
- dev_priv->dma_diff = 0;
-
- count = 10000000;
- while (!(via_read(dev_priv, 0x41c) & 0x80000000) && count--);
-
- reader = *(dev_priv->hw_addr_ptr);
- ptr = ((volatile char *)dev_priv->last_pause_ptr - dev_priv->dma_ptr) +
- dev_priv->dma_offset + (uint32_t) dev_priv->agpAddr + 4;
-
- /*
- * This is the difference between where we tell the
- * command reader to pause and where it actually pauses.
- * This differs between hw implementation so we need to
- * detect it.
- */
-
- dev_priv->dma_diff = ptr - reader;
-}
-
-static void via_pad_cache(drm_via_private_t *dev_priv, int qwords)
-{
- uint32_t *vb;
-
- via_cmdbuf_wait(dev_priv, qwords + 2);
- vb = via_get_dma(dev_priv);
- VIA_OUT_RING_QW(HC_HEADER2, HC_ParaType_NotTex << 16);
- via_align_buffer(dev_priv, vb, qwords);
-}
-
-static inline void via_dummy_bitblt(drm_via_private_t *dev_priv)
-{
- uint32_t *vb = via_get_dma(dev_priv);
- SetReg2DAGP(0x0C, (0 | (0 << 16)));
- SetReg2DAGP(0x10, 0 | (0 << 16));
- SetReg2DAGP(0x0, 0x1 | 0x2000 | 0xAA000000);
-}
-
-static void via_cmdbuf_jump(drm_via_private_t *dev_priv)
-{
- uint32_t pause_addr_lo, pause_addr_hi;
- uint32_t jump_addr_lo, jump_addr_hi;
- volatile uint32_t *last_pause_ptr;
- uint32_t dma_low_save1, dma_low_save2;
-
- via_align_cmd(dev_priv, HC_HAGPBpID_JUMP, 0, &jump_addr_hi,
- &jump_addr_lo, 0);
-
- dev_priv->dma_wrap = dev_priv->dma_low;
-
- /*
- * Wrap command buffer to the beginning.
- */
-
- dev_priv->dma_low = 0;
- if (via_cmdbuf_wait(dev_priv, CMDBUF_ALIGNMENT_SIZE) != 0)
- DRM_ERROR("via_cmdbuf_jump failed\n");
-
- via_dummy_bitblt(dev_priv);
- via_dummy_bitblt(dev_priv);
-
- last_pause_ptr =
- via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, &pause_addr_hi,
- &pause_addr_lo, 0) - 1;
- via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, &pause_addr_hi,
- &pause_addr_lo, 0);
-
- *last_pause_ptr = pause_addr_lo;
- dma_low_save1 = dev_priv->dma_low;
-
- /*
- * Now, set a trap that will pause the regulator if it tries to rerun the old
- * command buffer. (Which may happen if via_hook_segment detecs a command regulator pause
- * and reissues the jump command over PCI, while the regulator has already taken the jump
- * and actually paused at the current buffer end).
- * There appears to be no other way to detect this condition, since the hw_addr_pointer
- * does not seem to get updated immediately when a jump occurs.
- */
-
- last_pause_ptr =
- via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, &pause_addr_hi,
- &pause_addr_lo, 0) - 1;
- via_align_cmd(dev_priv, HC_HAGPBpID_PAUSE, 0, &pause_addr_hi,
- &pause_addr_lo, 0);
- *last_pause_ptr = pause_addr_lo;
-
- dma_low_save2 = dev_priv->dma_low;
- dev_priv->dma_low = dma_low_save1;
- via_hook_segment(dev_priv, jump_addr_hi, jump_addr_lo, 0);
- dev_priv->dma_low = dma_low_save2;
- via_hook_segment(dev_priv, pause_addr_hi, pause_addr_lo, 0);
-}
-
-
-static void via_cmdbuf_rewind(drm_via_private_t *dev_priv)
-{
- via_cmdbuf_jump(dev_priv);
-}
-
-static void via_cmdbuf_flush(drm_via_private_t *dev_priv, uint32_t cmd_type)
-{
- uint32_t pause_addr_lo, pause_addr_hi;
-
- via_align_cmd(dev_priv, cmd_type, 0, &pause_addr_hi, &pause_addr_lo, 0);
- via_hook_segment(dev_priv, pause_addr_hi, pause_addr_lo, 0);
-}
-
-static void via_cmdbuf_pause(drm_via_private_t *dev_priv)
-{
- via_cmdbuf_flush(dev_priv, HC_HAGPBpID_PAUSE);
-}
-
-static void via_cmdbuf_reset(drm_via_private_t *dev_priv)
-{
- via_cmdbuf_flush(dev_priv, HC_HAGPBpID_STOP);
- via_wait_idle(dev_priv);
-}
-
-/*
- * User interface to the space and lag functions.
- */
-
-static int via_cmdbuf_size(struct drm_device *dev, void *data, struct drm_file *file_priv)
-{
- drm_via_cmdbuf_size_t *d_siz = data;
- int ret = 0;
- uint32_t tmp_size, count;
- drm_via_private_t *dev_priv;
-
- DRM_DEBUG("\n");
- LOCK_TEST_WITH_RETURN(dev, file_priv);
-
- dev_priv = (drm_via_private_t *) dev->dev_private;
-
- if (dev_priv->ring.virtual_start == NULL) {
- DRM_ERROR("called without initializing AGP ring buffer.\n");
- return -EFAULT;
- }
-
- count = 1000000;
- tmp_size = d_siz->size;
- switch (d_siz->func) {
- case VIA_CMDBUF_SPACE:
- while (((tmp_size = via_cmdbuf_space(dev_priv)) < d_siz->size)
- && --count) {
- if (!d_siz->wait)
- break;
- }
- if (!count) {
- DRM_ERROR("VIA_CMDBUF_SPACE timed out.\n");
- ret = -EAGAIN;
- }
- break;
- case VIA_CMDBUF_LAG:
- while (((tmp_size = via_cmdbuf_lag(dev_priv)) > d_siz->size)
- && --count) {
- if (!d_siz->wait)
- break;
- }
- if (!count) {
- DRM_ERROR("VIA_CMDBUF_LAG timed out.\n");
- ret = -EAGAIN;
- }
- break;
- default:
- ret = -EFAULT;
- }
- d_siz->size = tmp_size;
-
- return ret;
-}
-
-static const struct drm_ioctl_desc via_ioctls[] = {
- DRM_IOCTL_DEF_DRV(VIA_ALLOCMEM, via_mem_alloc, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_FREEMEM, via_mem_free, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_AGP_INIT, via_agp_init, DRM_AUTH|DRM_MASTER),
- DRM_IOCTL_DEF_DRV(VIA_FB_INIT, via_fb_init, DRM_AUTH|DRM_MASTER),
- DRM_IOCTL_DEF_DRV(VIA_MAP_INIT, via_map_init, DRM_AUTH|DRM_MASTER),
- DRM_IOCTL_DEF_DRV(VIA_DEC_FUTEX, via_decoder_futex, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_DMA_INIT, via_dma_init, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_CMDBUFFER, via_cmdbuffer, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_FLUSH, via_flush_ioctl, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_PCICMD, via_pci_cmdbuffer, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_CMDBUF_SIZE, via_cmdbuf_size, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_WAIT_IRQ, via_wait_irq, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_DMA_BLIT, via_dma_blit, DRM_AUTH),
- DRM_IOCTL_DEF_DRV(VIA_BLIT_SYNC, via_dma_blit_sync, DRM_AUTH)
-};
-
-static int via_max_ioctl = ARRAY_SIZE(via_ioctls);
-static int via_driver_open(struct drm_device *dev, struct drm_file *file)
-{
- struct via_file_private *file_priv;
-
- DRM_DEBUG_DRIVER("\n");
- file_priv = kmalloc(sizeof(*file_priv), GFP_KERNEL);
- if (!file_priv)
- return -ENOMEM;
-
- file->driver_priv = file_priv;
-
- INIT_LIST_HEAD(&file_priv->obj_list);
-
- return 0;
-}
-
-static void via_driver_postclose(struct drm_device *dev, struct drm_file *file)
-{
- struct via_file_private *file_priv = file->driver_priv;
-
- kfree(file_priv);
-}
-
-static struct pci_device_id pciidlist[] = {
- viadrv_PCI_IDS
-};
-
-static const struct file_operations via_driver_fops = {
- .owner = THIS_MODULE,
- .open = drm_open,
- .release = drm_release,
- .unlocked_ioctl = drm_ioctl,
- .mmap = drm_legacy_mmap,
- .poll = drm_poll,
- .compat_ioctl = drm_compat_ioctl,
- .llseek = noop_llseek,
-};
-
-static struct drm_driver driver = {
- .driver_features =
- DRIVER_USE_AGP | DRIVER_HAVE_IRQ | DRIVER_LEGACY,
- .load = via_driver_load,
- .unload = via_driver_unload,
- .open = via_driver_open,
- .preclose = via_reclaim_buffers_locked,
- .postclose = via_driver_postclose,
- .context_dtor = via_final_context,
- .get_vblank_counter = via_get_vblank_counter,
- .enable_vblank = via_enable_vblank,
- .disable_vblank = via_disable_vblank,
- .irq_preinstall = via_driver_irq_preinstall,
- .irq_postinstall = via_driver_irq_postinstall,
- .irq_uninstall = via_driver_irq_uninstall,
- .irq_handler = via_driver_irq_handler,
- .dma_quiescent = via_driver_dma_quiescent,
- .lastclose = via_lastclose,
- .ioctls = via_ioctls,
- .fops = &via_driver_fops,
- .name = DRIVER_NAME,
- .desc = DRIVER_DESC,
- .date = DRIVER_DATE,
- .major = DRIVER_MAJOR,
- .minor = DRIVER_MINOR,
- .patchlevel = DRIVER_PATCHLEVEL,
-};
-
-static struct pci_driver via_pci_driver = {
- .name = DRIVER_NAME,
- .id_table = pciidlist,
-};
-
-static int __init via_init(void)
-{
- driver.num_ioctls = via_max_ioctl;
- via_init_command_verifier();
- return drm_legacy_pci_init(&driver, &via_pci_driver);
-}
-
-static void __exit via_exit(void)
-{
- drm_legacy_pci_exit(&driver, &via_pci_driver);
-}
-
-module_init(via_init);
-module_exit(via_exit);
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL and additional rights");
generated by cgit v1.2.3 (git 2.39.0) at 2024-07-26 08:30:10 +0300