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linux_dsm_epyc7002/drivers/gpu/drm/i915/i915_pci.c
Chris Wilson 2b49e7210e drm/i915: Disable per-engine reset for Broxton 
Triggering a GPU reset for one engine affects another, notably
corrupting the context status buffer (CSB) effectively losing track of
inflight requests.

Adding a few printks:
diff --git a/drivers/gpu/drm/i915/i915_drv.c b/drivers/gpu/drm/i915/i915_drv.c
index ad41836fa5e5..a969456bc0fa 100644
--- a/drivers/gpu/drm/i915/i915_drv.c
+++ b/drivers/gpu/drm/i915/i915_drv.c
@@ -1953,6 +1953,7 @@ int i915_reset_engine(struct intel_engine_cs *engine)
                goto out;
        }

+       pr_err("Resetting %s\n", engine->name);
        ret = intel_gpu_reset(engine->i915, intel_engine_flag(engine));
        if (ret) {
                /* If we fail here, we expect to fallback to a global reset */
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 716e5c9ea222..a72bc35d0870 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -355,6 +355,7 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
                                execlists_context_status_change(rq, INTEL_CONTEXT_SCHEDULE_IN);
                        port_set(&port[n], port_pack(rq, count));
                        desc = execlists_update_context(rq);
+                       pr_err("%s: in (rq=%x) ctx=%d\n", engine->name, rq->global_seqno, upper_32_bits(desc));
                        GEM_DEBUG_EXEC(port[n].context_id = upper_32_bits(desc));
                } else {
                        GEM_BUG_ON(!n);
@@ -594,9 +595,23 @@ static void intel_lrc_irq_handler(unsigned long data)
                        if (!(status & GEN8_CTX_STATUS_COMPLETED_MASK))
                                continue;

+                       pr_err("%s: out CSB (%x head=%d, tail=%d), ctx=%d, rq=%d\n",
+                                       engine->name,
+                                       readl(csb_mmio),
+                                       head, tail,
+                                       readl(buf+2*head+1),
+                                       port->context_id);
+
                        /* Check the context/desc id for this event matches */
-                       GEM_DEBUG_BUG_ON(readl(buf + 2 * head + 1) !=
-                                        port->context_id);
+                       if (readl(buf + 2 * head + 1) != port->context_id) {
+                               pr_err("%s: BUG CSB (%x head=%d, tail=%d), ctx=%d, rq=%d\n",
+                                               engine->name,
+                                               readl(csb_mmio),
+                                               head, tail,
+                                               readl(buf+2*head+1),
+                                               port->context_id);
+                               BUG();
+                       }

                        rq = port_unpack(port, &count);
                        GEM_BUG_ON(count == 0);

Results in:

[ 6423.006602] Resetting rcs0
[ 6423.009080] rcs0: in (rq=fffffe70) ctx=1
[ 6423.009216] rcs0: in (rq=fffffe6f) ctx=3
[ 6423.009542] rcs0: out CSB (2 head=1, tail=2), ctx=3, rq=3
[ 6423.009619] Resetting bcs0
[ 6423.009980] rcs0: BUG CSB (0 head=1, tail=2), ctx=0, rq=3

Note that this bug may be affect all machines and not just Broxton,
Broxton is just the first machine on which I have confirmed this bug.

Fixes: 142bc7d99b ("drm/i915: Modify error handler for per engine hang recovery")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Cc: Michel Thierry <michel.thierry@intel.com>
Acked-by: Michel Thierry <michel.thierry@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170721123238.16428-13-chris@chris-wilson.co.uk

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2017-07-27 09:38:48 +02:00

611 lines
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/*
* Copyright © 2016 Intel Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (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 NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS 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/console.h>
#include <linux/vgaarb.h>
#include <linux/vga_switcheroo.h>
#include "i915_drv.h"
#include "i915_selftest.h"
#define GEN_DEFAULT_PIPEOFFSETS \
.pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
PIPE_C_OFFSET, PIPE_EDP_OFFSET }, \
.trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
TRANSCODER_C_OFFSET, TRANSCODER_EDP_OFFSET }, \
.palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET }
#define GEN_CHV_PIPEOFFSETS \
.pipe_offsets = { PIPE_A_OFFSET, PIPE_B_OFFSET, \
CHV_PIPE_C_OFFSET }, \
.trans_offsets = { TRANSCODER_A_OFFSET, TRANSCODER_B_OFFSET, \
CHV_TRANSCODER_C_OFFSET, }, \
.palette_offsets = { PALETTE_A_OFFSET, PALETTE_B_OFFSET, \
CHV_PALETTE_C_OFFSET }
#define CURSOR_OFFSETS \
.cursor_offsets = { CURSOR_A_OFFSET, CURSOR_B_OFFSET, CHV_CURSOR_C_OFFSET }
#define IVB_CURSOR_OFFSETS \
.cursor_offsets = { CURSOR_A_OFFSET, IVB_CURSOR_B_OFFSET, IVB_CURSOR_C_OFFSET }
#define BDW_COLORS \
.color = { .degamma_lut_size = 512, .gamma_lut_size = 512 }
#define CHV_COLORS \
.color = { .degamma_lut_size = 65, .gamma_lut_size = 257 }
/* Keep in gen based order, and chronological order within a gen */
#define GEN2_FEATURES \
.gen = 2, .num_pipes = 1, \
.has_overlay = 1, .overlay_needs_physical = 1, \
.has_gmch_display = 1, \
.hws_needs_physical = 1, \
.unfenced_needs_alignment = 1, \
.ring_mask = RENDER_RING, \
GEN_DEFAULT_PIPEOFFSETS, \
CURSOR_OFFSETS
static const struct intel_device_info intel_i830_info = {
GEN2_FEATURES,
.platform = INTEL_I830,
.is_mobile = 1, .cursor_needs_physical = 1,
.num_pipes = 2, /* legal, last one wins */
};
static const struct intel_device_info intel_i845g_info = {
GEN2_FEATURES,
.platform = INTEL_I845G,
};
static const struct intel_device_info intel_i85x_info = {
GEN2_FEATURES,
.platform = INTEL_I85X, .is_mobile = 1,
.num_pipes = 2, /* legal, last one wins */
.cursor_needs_physical = 1,
.has_fbc = 1,
};
static const struct intel_device_info intel_i865g_info = {
GEN2_FEATURES,
.platform = INTEL_I865G,
};
#define GEN3_FEATURES \
.gen = 3, .num_pipes = 2, \
.has_gmch_display = 1, \
.ring_mask = RENDER_RING, \
GEN_DEFAULT_PIPEOFFSETS, \
CURSOR_OFFSETS
static const struct intel_device_info intel_i915g_info = {
GEN3_FEATURES,
.platform = INTEL_I915G, .cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
.hws_needs_physical = 1,
.unfenced_needs_alignment = 1,
};
static const struct intel_device_info intel_i915gm_info = {
GEN3_FEATURES,
.platform = INTEL_I915GM,
.is_mobile = 1,
.cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
.supports_tv = 1,
.has_fbc = 1,
.hws_needs_physical = 1,
.unfenced_needs_alignment = 1,
};
static const struct intel_device_info intel_i945g_info = {
GEN3_FEATURES,
.platform = INTEL_I945G,
.has_hotplug = 1, .cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
.hws_needs_physical = 1,
.unfenced_needs_alignment = 1,
};
static const struct intel_device_info intel_i945gm_info = {
GEN3_FEATURES,
.platform = INTEL_I945GM, .is_mobile = 1,
.has_hotplug = 1, .cursor_needs_physical = 1,
.has_overlay = 1, .overlay_needs_physical = 1,
.supports_tv = 1,
.has_fbc = 1,
.hws_needs_physical = 1,
.unfenced_needs_alignment = 1,
};
static const struct intel_device_info intel_g33_info = {
GEN3_FEATURES,
.platform = INTEL_G33,
.has_hotplug = 1,
.has_overlay = 1,
};
static const struct intel_device_info intel_pineview_info = {
GEN3_FEATURES,
.platform = INTEL_PINEVIEW, .is_mobile = 1,
.has_hotplug = 1,
.has_overlay = 1,
};
#define GEN4_FEATURES \
.gen = 4, .num_pipes = 2, \
.has_hotplug = 1, \
.has_gmch_display = 1, \
.ring_mask = RENDER_RING, \
GEN_DEFAULT_PIPEOFFSETS, \
CURSOR_OFFSETS
static const struct intel_device_info intel_i965g_info = {
GEN4_FEATURES,
.platform = INTEL_I965G,
.has_overlay = 1,
.hws_needs_physical = 1,
};
static const struct intel_device_info intel_i965gm_info = {
GEN4_FEATURES,
.platform = INTEL_I965GM,
.is_mobile = 1, .has_fbc = 1,
.has_overlay = 1,
.supports_tv = 1,
.hws_needs_physical = 1,
};
static const struct intel_device_info intel_g45_info = {
GEN4_FEATURES,
.platform = INTEL_G45,
.has_pipe_cxsr = 1,
.ring_mask = RENDER_RING | BSD_RING,
};
static const struct intel_device_info intel_gm45_info = {
GEN4_FEATURES,
.platform = INTEL_GM45,
.is_mobile = 1, .has_fbc = 1,
.has_pipe_cxsr = 1,
.supports_tv = 1,
.ring_mask = RENDER_RING | BSD_RING,
};
#define GEN5_FEATURES \
.gen = 5, .num_pipes = 2, \
.has_hotplug = 1, \
.has_gmbus_irq = 1, \
.ring_mask = RENDER_RING | BSD_RING, \
GEN_DEFAULT_PIPEOFFSETS, \
CURSOR_OFFSETS
static const struct intel_device_info intel_ironlake_d_info = {
GEN5_FEATURES,
.platform = INTEL_IRONLAKE,
};
static const struct intel_device_info intel_ironlake_m_info = {
GEN5_FEATURES,
.platform = INTEL_IRONLAKE,
.is_mobile = 1, .has_fbc = 1,
};
#define GEN6_FEATURES \
.gen = 6, .num_pipes = 2, \
.has_hotplug = 1, \
.has_fbc = 1, \
.ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
.has_llc = 1, \
.has_rc6 = 1, \
.has_rc6p = 1, \
.has_gmbus_irq = 1, \
.has_aliasing_ppgtt = 1, \
GEN_DEFAULT_PIPEOFFSETS, \
CURSOR_OFFSETS
static const struct intel_device_info intel_sandybridge_d_info = {
GEN6_FEATURES,
.platform = INTEL_SANDYBRIDGE,
};
static const struct intel_device_info intel_sandybridge_m_info = {
GEN6_FEATURES,
.platform = INTEL_SANDYBRIDGE,
.is_mobile = 1,
};
#define GEN7_FEATURES \
.gen = 7, .num_pipes = 3, \
.has_hotplug = 1, \
.has_fbc = 1, \
.ring_mask = RENDER_RING | BSD_RING | BLT_RING, \
.has_llc = 1, \
.has_rc6 = 1, \
.has_rc6p = 1, \
.has_gmbus_irq = 1, \
.has_aliasing_ppgtt = 1, \
.has_full_ppgtt = 1, \
GEN_DEFAULT_PIPEOFFSETS, \
IVB_CURSOR_OFFSETS
static const struct intel_device_info intel_ivybridge_d_info = {
GEN7_FEATURES,
.platform = INTEL_IVYBRIDGE,
.has_l3_dpf = 1,
};
static const struct intel_device_info intel_ivybridge_m_info = {
GEN7_FEATURES,
.platform = INTEL_IVYBRIDGE,
.is_mobile = 1,
.has_l3_dpf = 1,
};
static const struct intel_device_info intel_ivybridge_q_info = {
GEN7_FEATURES,
.platform = INTEL_IVYBRIDGE,
.num_pipes = 0, /* legal, last one wins */
.has_l3_dpf = 1,
};
static const struct intel_device_info intel_valleyview_info = {
.platform = INTEL_VALLEYVIEW,
.gen = 7,
.is_lp = 1,
.num_pipes = 2,
.has_psr = 1,
.has_runtime_pm = 1,
.has_rc6 = 1,
.has_gmbus_irq = 1,
.has_gmch_display = 1,
.has_hotplug = 1,
.has_aliasing_ppgtt = 1,
.has_full_ppgtt = 1,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING,
.display_mmio_offset = VLV_DISPLAY_BASE,
GEN_DEFAULT_PIPEOFFSETS,
CURSOR_OFFSETS
};
#define HSW_FEATURES \
GEN7_FEATURES, \
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING, \
.has_ddi = 1, \
.has_fpga_dbg = 1, \
.has_psr = 1, \
.has_resource_streamer = 1, \
.has_dp_mst = 1, \
.has_rc6p = 0 /* RC6p removed-by HSW */, \
.has_runtime_pm = 1
static const struct intel_device_info intel_haswell_info = {
HSW_FEATURES,
.platform = INTEL_HASWELL,
.has_l3_dpf = 1,
};
#define BDW_FEATURES \
HSW_FEATURES, \
BDW_COLORS, \
.has_logical_ring_contexts = 1, \
.has_full_48bit_ppgtt = 1, \
.has_64bit_reloc = 1, \
.has_reset_engine = 1
#define BDW_PLATFORM \
BDW_FEATURES, \
.gen = 8, \
.platform = INTEL_BROADWELL
static const struct intel_device_info intel_broadwell_info = {
BDW_PLATFORM,
};
static const struct intel_device_info intel_broadwell_gt3_info = {
BDW_PLATFORM,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
};
static const struct intel_device_info intel_cherryview_info = {
.gen = 8, .num_pipes = 3,
.has_hotplug = 1,
.is_lp = 1,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING,
.platform = INTEL_CHERRYVIEW,
.has_64bit_reloc = 1,
.has_psr = 1,
.has_runtime_pm = 1,
.has_resource_streamer = 1,
.has_rc6 = 1,
.has_gmbus_irq = 1,
.has_logical_ring_contexts = 1,
.has_gmch_display = 1,
.has_aliasing_ppgtt = 1,
.has_full_ppgtt = 1,
.has_reset_engine = 1,
.display_mmio_offset = VLV_DISPLAY_BASE,
GEN_CHV_PIPEOFFSETS,
CURSOR_OFFSETS,
CHV_COLORS,
};
#define SKL_PLATFORM \
BDW_FEATURES, \
.gen = 9, \
.platform = INTEL_SKYLAKE, \
.has_csr = 1, \
.has_guc = 1, \
.ddb_size = 896
static const struct intel_device_info intel_skylake_info = {
SKL_PLATFORM,
};
static const struct intel_device_info intel_skylake_gt3_info = {
SKL_PLATFORM,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
};
#define GEN9_LP_FEATURES \
.gen = 9, \
.is_lp = 1, \
.has_hotplug = 1, \
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING, \
.num_pipes = 3, \
.has_64bit_reloc = 1, \
.has_ddi = 1, \
.has_fpga_dbg = 1, \
.has_fbc = 1, \
.has_runtime_pm = 1, \
.has_pooled_eu = 0, \
.has_csr = 1, \
.has_resource_streamer = 1, \
.has_rc6 = 1, \
.has_dp_mst = 1, \
.has_gmbus_irq = 1, \
.has_logical_ring_contexts = 1, \
.has_guc = 1, \
.has_aliasing_ppgtt = 1, \
.has_full_ppgtt = 1, \
.has_full_48bit_ppgtt = 1, \
.has_reset_engine = 1, \
GEN_DEFAULT_PIPEOFFSETS, \
IVB_CURSOR_OFFSETS, \
BDW_COLORS
static const struct intel_device_info intel_broxton_info = {
GEN9_LP_FEATURES,
.platform = INTEL_BROXTON,
.ddb_size = 512,
.has_reset_engine = false,
};
static const struct intel_device_info intel_geminilake_info = {
GEN9_LP_FEATURES,
.platform = INTEL_GEMINILAKE,
.ddb_size = 1024,
.color = { .degamma_lut_size = 0, .gamma_lut_size = 1024 }
};
#define KBL_PLATFORM \
BDW_FEATURES, \
.gen = 9, \
.platform = INTEL_KABYLAKE, \
.has_csr = 1, \
.has_guc = 1, \
.ddb_size = 896
static const struct intel_device_info intel_kabylake_info = {
KBL_PLATFORM,
};
static const struct intel_device_info intel_kabylake_gt3_info = {
KBL_PLATFORM,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
};
#define CFL_PLATFORM \
.is_alpha_support = 1, \
BDW_FEATURES, \
.gen = 9, \
.platform = INTEL_COFFEELAKE, \
.has_csr = 1, \
.has_guc = 1, \
.ddb_size = 896
static const struct intel_device_info intel_coffeelake_info = {
CFL_PLATFORM,
};
static const struct intel_device_info intel_coffeelake_gt3_info = {
CFL_PLATFORM,
.ring_mask = RENDER_RING | BSD_RING | BLT_RING | VEBOX_RING | BSD2_RING,
};
static const struct intel_device_info intel_cannonlake_info = {
BDW_FEATURES,
.is_alpha_support = 1,
.platform = INTEL_CANNONLAKE,
.gen = 10,
.ddb_size = 1024,
.has_csr = 1,
.color = { .degamma_lut_size = 0, .gamma_lut_size = 1024 }
};
/*
* Make sure any device matches here are from most specific to most
* general. For example, since the Quanta match is based on the subsystem
* and subvendor IDs, we need it to come before the more general IVB
* PCI ID matches, otherwise we'll use the wrong info struct above.
*/
static const struct pci_device_id pciidlist[] = {
INTEL_I830_IDS(&intel_i830_info),
INTEL_I845G_IDS(&intel_i845g_info),
INTEL_I85X_IDS(&intel_i85x_info),
INTEL_I865G_IDS(&intel_i865g_info),
INTEL_I915G_IDS(&intel_i915g_info),
INTEL_I915GM_IDS(&intel_i915gm_info),
INTEL_I945G_IDS(&intel_i945g_info),
INTEL_I945GM_IDS(&intel_i945gm_info),
INTEL_I965G_IDS(&intel_i965g_info),
INTEL_G33_IDS(&intel_g33_info),
INTEL_I965GM_IDS(&intel_i965gm_info),
INTEL_GM45_IDS(&intel_gm45_info),
INTEL_G45_IDS(&intel_g45_info),
INTEL_PINEVIEW_IDS(&intel_pineview_info),
INTEL_IRONLAKE_D_IDS(&intel_ironlake_d_info),
INTEL_IRONLAKE_M_IDS(&intel_ironlake_m_info),
INTEL_SNB_D_IDS(&intel_sandybridge_d_info),
INTEL_SNB_M_IDS(&intel_sandybridge_m_info),
INTEL_IVB_Q_IDS(&intel_ivybridge_q_info), /* must be first IVB */
INTEL_IVB_M_IDS(&intel_ivybridge_m_info),
INTEL_IVB_D_IDS(&intel_ivybridge_d_info),
INTEL_HSW_IDS(&intel_haswell_info),
INTEL_VLV_IDS(&intel_valleyview_info),
INTEL_BDW_GT12_IDS(&intel_broadwell_info),
INTEL_BDW_GT3_IDS(&intel_broadwell_gt3_info),
INTEL_BDW_RSVD_IDS(&intel_broadwell_info),
INTEL_CHV_IDS(&intel_cherryview_info),
INTEL_SKL_GT1_IDS(&intel_skylake_info),
INTEL_SKL_GT2_IDS(&intel_skylake_info),
INTEL_SKL_GT3_IDS(&intel_skylake_gt3_info),
INTEL_SKL_GT4_IDS(&intel_skylake_gt3_info),
INTEL_BXT_IDS(&intel_broxton_info),
INTEL_GLK_IDS(&intel_geminilake_info),
INTEL_KBL_GT1_IDS(&intel_kabylake_info),
INTEL_KBL_GT2_IDS(&intel_kabylake_info),
INTEL_KBL_GT3_IDS(&intel_kabylake_gt3_info),
INTEL_KBL_GT4_IDS(&intel_kabylake_gt3_info),
INTEL_CFL_S_IDS(&intel_coffeelake_info),
INTEL_CFL_H_IDS(&intel_coffeelake_info),
INTEL_CFL_U_IDS(&intel_coffeelake_gt3_info),
INTEL_CNL_IDS(&intel_cannonlake_info),
{0, 0, 0}
};
MODULE_DEVICE_TABLE(pci, pciidlist);
static void i915_pci_remove(struct pci_dev *pdev)
{
struct drm_device *dev = pci_get_drvdata(pdev);
i915_driver_unload(dev);
drm_dev_unref(dev);
}
static int i915_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
struct intel_device_info *intel_info =
(struct intel_device_info *) ent->driver_data;
int err;
if (IS_ALPHA_SUPPORT(intel_info) && !i915.alpha_support) {
DRM_INFO("The driver support for your hardware in this kernel version is alpha quality\n"
"See CONFIG_DRM_I915_ALPHA_SUPPORT or i915.alpha_support module parameter\n"
"to enable support in this kernel version, or check for kernel updates.\n");
return -ENODEV;
}
/* Only bind to function 0 of the device. Early generations
* used function 1 as a placeholder for multi-head. This causes
* us confusion instead, especially on the systems where both
* functions have the same PCI-ID!
*/
if (PCI_FUNC(pdev->devfn))
return -ENODEV;
/*
* apple-gmux is needed on dual GPU MacBook Pro
* to probe the panel if we're the inactive GPU.
*/
if (vga_switcheroo_client_probe_defer(pdev))
return -EPROBE_DEFER;
err = i915_driver_load(pdev, ent);
if (err)
return err;
err = i915_live_selftests(pdev);
if (err) {
i915_pci_remove(pdev);
return err > 0 ? -ENOTTY : err;
}
return 0;
}
static struct pci_driver i915_pci_driver = {
.name = DRIVER_NAME,
.id_table = pciidlist,
.probe = i915_pci_probe,
.remove = i915_pci_remove,
.driver.pm = &i915_pm_ops,
};
static int __init i915_init(void)
{
bool use_kms = true;
int err;
err = i915_mock_selftests();
if (err)
return err > 0 ? 0 : err;
/*
* Enable KMS by default, unless explicitly overriden by
* either the i915.modeset prarameter or by the
* vga_text_mode_force boot option.
*/
if (i915.modeset == 0)
use_kms = false;
if (vgacon_text_force() && i915.modeset == -1)
use_kms = false;
if (!use_kms) {
/* Silently fail loading to not upset userspace. */
DRM_DEBUG_DRIVER("KMS disabled.\n");
return 0;
}
return pci_register_driver(&i915_pci_driver);
}
static void __exit i915_exit(void)
{
if (!i915_pci_driver.driver.owner)
return;
pci_unregister_driver(&i915_pci_driver);
}
module_init(i915_init);
module_exit(i915_exit);
MODULE_AUTHOR("Tungsten Graphics, Inc.");
MODULE_AUTHOR("Intel Corporation");
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL and additional rights");
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