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Re: A driver for i830M

From: Todd C. Miller <Todd.Miller(at)courtesan.com>
Date: Tue Mar 18 2003 - 19:19:52 EST

Can you (or someone else with an i830) try a kernel with the following patch (relative to OpenBSD-current) and send me the resulting dmesg?

todd

Index: arch/i386/pci/agp_machdep.c

RCS file: /cvs/src/sys/arch/i386/pci/agp_machdep.c,v retrieving revision 1.1
diff -u -r1.1 agp_machdep.c

--- arch/i386/pci/agp_machdep.c	12 Jul 2002 20:17:03 -0000	1.1
+++ arch/i386/pci/agp_machdep.c	18 Mar 2003 19:34:00 -0000


@@ -43,7 +43,8 @@

 	{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_DC100_GC, agp_i810_attach },
 	{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810E_GC, agp_i810_attach },
 	{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82815_FULL_GRAPH, agp_i810_attach },
-/*	{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82830MP_IV, agp_i810_attach }, */
+	{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82830MP_IV, agp_i810_attach },
+	{ PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82845G_IGD, agp_i810_attach },
 	{ PCI_VENDOR_INTEL, -1, agp_intel_attach },
 	{ PCI_VENDOR_SIS, -1, agp_sis_attach },
 	{ PCI_VENDOR_VIATECH, -1, agp_via_attach },

Index: dev/pci/agp_i810.c

RCS file: /cvs/src/sys/dev/pci/agp_i810.c,v retrieving revision 1.4
diff -u -r1.4 agp_i810.c

--- dev/pci/agp_i810.c	13 Feb 2003 20:07:33 -0000	1.4
+++ dev/pci/agp_i810.c	18 Mar 2003 20:39:18 -0000

@@ -1,5 +1,5 @@


 /*	$OpenBSD: agp_i810.c,v 1.4 2003/02/13 20:07:33 mickey Exp $	*/
-/*	$NetBSD: agp_i810.c,v 1.8 2001/09/20 20:00:16 fvdl Exp $	*/
+/*	$NetBSD: agp_i810.c,v 1.15 2003/01/31 00:07:39 thorpej Exp $	*/

/*-

Copyright (c) 2000 Doug Rabson
@@ -46,20 +46,27 @@
#include <dev/pci/pcidevs.h> #include <dev/pci/agpvar.h> #include <dev/pci/agpreg.h> - #include <dev/pci/vga_pcivar.h>

#include <machine/bus.h>

 #define READ1(off)	bus_space_read_1(isc->bst, isc->bsh, off)
+#define READ4(off)	bus_space_read_4(isc->bst, isc->bsh, off)
 #define WRITE4(off,v)	bus_space_write_4(isc->bst, isc->bsh, off, v)
 
+#define CHIP_I810 0	/* i810/i815 */
+#define CHIP_I830 1	/* i830/i845 */

+
struct agp_i810_softc {

-	u_int32_t initial_aperture;	   /* aperture size at startup */
+	u_int32_t initial_aperture;	/* aperture size at startup */
 	struct agp_gatt *gatt;
-	u_int32_t dcache_size;
-	bus_space_tag_t bst;		    /* bus_space tag */
-	bus_space_handle_t bsh;		    /* bus_space handle */
+	int chiptype;			/* i810-like or i830 */
+	u_int32_t dcache_size;		/* i810 only */
+	u_int32_t stolen;		/* number of i830/845 gtt entries
+					   for stolen memory */
+	bus_space_tag_t bst;		/* bus_space tag */
+	bus_space_handle_t bsh;		/* bus_space handle */
+	struct pci_attach_args bridge_pa;
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};

u_int32_t agp_i810_get_aperture(struct vga_pci_softc *);
@@ -88,9 +95,8 @@

agp_i810_unbind_memory,
};

-
int

-agp_i810_attach(struct vga_pci_softc* sc, struct pci_attach_args *pa,
+agp_i810_attach(struct vga_pci_softc *sc, struct pci_attach_args *pa,
 		struct pci_attach_args *pchb_pa)
 {
 	struct agp_i810_softc *isc;


@@ -105,7 +111,7 @@


 	memset(isc, 0, sizeof *isc);
 	sc->sc_chipc = isc;
 	sc->sc_methods = &agp_i810_methods;
-	sc->sc_dmat = pa->pa_dmat;	/* XXX fvdl */
+	memcpy(&isc->bridge_pa, pchb_pa, sizeof *pchb_pa);
 
 	if ((error = agp_map_aperture(sc))) {
 		printf(": can't map aperture\n");


@@ -113,6 +119,19 @@


 		return (error);
 	}
 
+	switch (PCI_PRODUCT(pa->pa_id)) {
+	case PCI_PRODUCT_INTEL_82810_GC:
+	case PCI_PRODUCT_INTEL_82810_DC100_GC:
+	case PCI_PRODUCT_INTEL_82810E_GC:
+	case PCI_PRODUCT_INTEL_82815_FULL_GRAPH:
+		isc->chiptype = CHIP_I810;
+		break;
+	case PCI_PRODUCT_INTEL_82830MP_IV:
+	case PCI_PRODUCT_INTEL_82845G_IGD:
+		isc->chiptype = CHIP_I830;
+		break;
+	}
+
 	error = pci_mapreg_map(pa, AGP_I810_MMADR,
 	    PCI_MAPREG_TYPE_MEM, 0, &isc->bst, &isc->bsh, NULL, NULL, 0);
 	if (error != 0) {

@@ -122,29 +141,78 @@

Do you need more help?

isc->initial_aperture = AGP_GET_APERTURE(sc);

if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED)
isc->dcache_size = 4 * 1024 * 1024;
else
isc->dcache_size = 0; -
for (;;) {
gatt = agp_alloc_gatt(sc);
if (gatt)
break; + gatt = malloc(sizeof(struct agp_gatt), M_DEVBUF, M_NOWAIT); + if (!gatt) { + agp_generic_detach(sc); + return (ENOMEM); + } + isc->gatt = gatt;
/*
* Probably contigmalloc failure. Try reducing the
* aperture so that the gatt size reduces.
*/
if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { + gatt->ag_entries = AGP_GET_APERTURE(sc) >> AGP_PAGE_SHIFT; + + if (isc->chiptype == CHIP_I810) { + int dummyseg; + /* Some i810s have on-chip memory called dcache */ + if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED) + isc->dcache_size = 4 * 1024 * 1024; + else + isc->dcache_size = 0; + + /* According to the specs the gatt on the i810 must be 64k */ + if (agp_alloc_dmamem(sc->sc_dmat, 64 * 1024, + 0, &gatt->ag_dmamap, (caddr_t *)&gatt->ag_virtual, + &gatt->ag_physical, &gatt->ag_dmaseg, 1, &dummyseg) != 0) { + free(gatt, M_DEVBUF); agp_generic_detach(sc); return (ENOMEM); }
}
isc->gatt = gatt;
/* Install the GATT. */
WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1); + gatt->ag_size = gatt->ag_entries * sizeof(u_int32_t); + memset(gatt->ag_virtual, 0, gatt->ag_size); + + agp_flush_cache(); + /* Install the GATT. */ + WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1); + } else { + /* The i830 automatically initializes the 128k gatt on boot. */ + pcireg_t reg; + u_int32_t pgtblctl; + u_int16_t gcc1; + + reg = pci_conf_read(isc->bridge_pa.pa_pc, + isc->bridge_pa.pa_tag, AGP_I830_GCC1); + gcc1 = (u_int16_t)(reg >> 16); + switch (gcc1 & AGP_I830_GCC1_GMS) { + case AGP_I830_GCC1_GMS_STOLEN_512: + isc->stolen = (512 - 132) * 1024 / 4096; + break; + case AGP_I830_GCC1_GMS_STOLEN_1024: + isc->stolen = (1024 - 132) * 1024 / 4096; + break; + case AGP_I830_GCC1_GMS_STOLEN_8192: + isc->stolen = (8192 - 132) * 1024 / 4096; + break; + default: + isc->stolen = 0; + printf( + ": unknown memory configuration, disabling\n"); + agp_generic_detach(sc); + return (EINVAL); + } + if (isc->stolen > 0) { + printf(": detected %dk stolen memory", + isc->stolen * 4); + } + printf(": aperture size is %dM", + isc->initial_aperture / 1024 / 1024); + + /* GATT address is already in there, make sure it's enabled */ + pgtblctl = READ4(AGP_I810_PGTBL_CTL); + pgtblctl |= 1; + WRITE4(AGP_I810_PGTBL_CTL, pgtblctl); + + gatt->ag_physical = pgtblctl & ~1; + }

 	/*
 	 * Make sure the chipset can see everything.

@@ -157,54 +225,115 @@

u_int32_t
agp_i810_get_aperture(struct vga_pci_softc *sc) {

-	u_int16_t miscc;
+	struct agp_i810_softc *isc = sc->sc_chipc;
+	pcireg_t reg;
 
-	miscc = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_I810_SMRAM) >> 16;
-	if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32)
-		return (32 * 1024 * 1024);
-	else
-		return (64 * 1024 * 1024);
+	if (isc->chiptype == CHIP_I810) {
+		u_int16_t miscc;
+
+		reg = pci_conf_read(isc->bridge_pa.pa_pc,
+		    isc->bridge_pa.pa_tag, AGP_I810_SMRAM);
+		miscc = (u_int16_t)(reg >> 16);
+		if ((miscc & AGP_I810_MISCC_WINSIZE) ==
+		    AGP_I810_MISCC_WINSIZE_32)
+			return (32 * 1024 * 1024);
+		else
+			return (64 * 1024 * 1024);
+	} else {		/* I830 */
+		u_int16_t gcc1;
+
+		reg = pci_conf_read(isc->bridge_pa.pa_pc,
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+		    isc->bridge_pa.pa_tag, AGP_I830_GCC0);
+		gcc1 = (u_int16_t)(reg >> 16);
+		if ((gcc1 & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64)
+			return (64 * 1024 * 1024);
+		else
+			return (128 * 1024 * 1024);
+	}

}

int
agp_i810_set_aperture(struct vga_pci_softc *sc, u_int32_t aperture) {

-	pcireg_t reg, miscc;
+	struct agp_i810_softc *isc = sc->sc_chipc;
+	pcireg_t reg;
 
-	/*
-	 * Double check for sanity.
-	 */
-	if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) {
-		printf("AGP: bad aperture size %d\n", aperture);
-		return (EINVAL);
-	}
+	if (isc->chiptype == CHIP_I810) {
+		u_int16_t miscc;
 
-	reg = pci_conf_read(sc->sc_pc, sc->sc_pcitag, AGP_I810_SMRAM);
-	miscc = reg >> 16;
-	miscc &= ~AGP_I810_MISCC_WINSIZE;
-	if (aperture == 32 * 1024 * 1024)
-		miscc |= AGP_I810_MISCC_WINSIZE_32;
-	else
-		miscc |= AGP_I810_MISCC_WINSIZE_64;
-
-	reg &= 0x0000ffff;
-	reg |= (miscc << 16);
-	pci_conf_write(sc->sc_pc, sc->sc_pcitag, AGP_I810_SMRAM, miscc);
+		/*
+		 * Double check for sanity.
+		 */
+		if (aperture != (32 * 1024 * 1024) &&
+		    aperture != (64 * 1024 * 1024)) {
+			printf("agp: bad aperture size %d\n", aperture);
+			return (EINVAL);
+		}
+
+		reg = pci_conf_read(isc->bridge_pa.pa_pc,
+		    isc->bridge_pa.pa_tag, AGP_I810_SMRAM);
+		miscc = (u_int16_t)(reg >> 16);
+		miscc &= ~AGP_I810_MISCC_WINSIZE;
+		if (aperture == 32 * 1024 * 1024)
+			miscc |= AGP_I810_MISCC_WINSIZE_32;
+		else
+			miscc |= AGP_I810_MISCC_WINSIZE_64;
+
+		reg &= 0x0000ffff;
+		reg |= ((pcireg_t)miscc) << 16;
+		pci_conf_write(isc->bridge_pa.pa_pc,
+		    isc->bridge_pa.pa_tag, AGP_I810_SMRAM, reg);
+	} else {		/* I830 */
+		u_int16_t gcc1;
+
+		if (aperture != (64 * 1024 * 1024) &&
+		    aperture != (128 * 1024 * 1024)) {
+			printf("agp: bad aperture size %d\n", aperture);
+			return (EINVAL);
+		}
+		reg = pci_conf_read(isc->bridge_pa.pa_pc,
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+		    isc->bridge_pa.pa_tag, AGP_I830_GCC0);
+		gcc1 = (u_int16_t)(reg >> 16);
+		gcc1 &= ~AGP_I830_GCC1_GMASIZE;
+		if (aperture == 64 * 1024 * 1024)
+			gcc1 |= AGP_I830_GCC1_GMASIZE_64;
+		else
+			gcc1 |= AGP_I830_GCC1_GMASIZE_128;
+
+		reg &= 0x0000ffff;
+		reg |= ((pcireg_t)gcc1) << 16;
+		pci_conf_write(isc->bridge_pa.pa_pc,
+		    isc->bridge_pa.pa_tag, AGP_I830_GCC0, reg);
+	}
 
 	return (0);

}

int
-agp_i810_bind_page(struct vga_pci_softc *sc, off_t offset, bus_addr_t pa) +agp_i810_bind_page(struct vga_pci_softc *sc, off_t offset, bus_addr_t physical) {

struct agp_i810_softc *isc = sc->sc_chipc;

if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) + if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) { +#ifdef DEBUG + printf("agp: failed: offset 0x%08x, shift %d, entries %d\n", + (int)offset, AGP_PAGE_SHIFT, + isc->gatt->ag_entries); +#endif return (EINVAL); + }
WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4,
pa | 1); + if (isc->chiptype == CHIP_I810) { + if ((offset >> AGP_PAGE_SHIFT) < isc->stolen) { +#ifdef DEBUG + printf("agp: trying to bind into stolen memory\n"); +#endif + return (EINVAL); + } + }

+	WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4,
+	    physical | 1);
 	return (0);

}

@@ -216,6 +345,15 @@

 	if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT))
 		return (EINVAL);
 
+	if (isc->chiptype == CHIP_I830 ) {
+		if ((offset >> AGP_PAGE_SHIFT) < isc->stolen) {
+#ifdef DEBUG
+			printf("agp: trying to unbind from stolen memory\n");
+#endif
+			return (EINVAL);
+		}
+	}
+
 	WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 0);
 	return (0);

}
@@ -245,6 +383,8 @@

 		/*
 		 * Mapping local DRAM into GATT.
 		 */
+		if (isc->chiptype == CHIP_I830 )
+			return (NULL);
 		if (size != isc->dcache_size)
 			return (NULL);
 	} else if (type == 2) {


@@ -260,11 +400,14 @@


 	mem->am_id = sc->sc_nextid++;
 	mem->am_size = size;
 	mem->am_type = type;

-
+

 	if (type == 2) {
+		/*
+		 * Allocate and wire down the page now so that we can
+		 * get its physical address.
+		 */
 		mem->am_dmaseg = malloc(sizeof *mem->am_dmaseg, M_DEVBUF,
 		    M_WAITOK);
-
 		if ((error = agp_alloc_dmamem(sc->sc_dmat, size, 0,
 		    &mem->am_dmamap, &mem->am_virtual, &mem->am_physical,
 		    mem->am_dmaseg, 1, &mem->am_nseg)) != 0) {

@@ -294,7 +437,7 @@

{

 	if (mem->am_is_bound)
 		return (EBUSY);

-
+

 	if (mem->am_type == 2) {
 		agp_free_dmamem(sc->sc_dmat, mem->am_size, mem->am_dmamap,
 		    mem->am_virtual, mem->am_dmaseg, mem->am_nseg);


@@ -339,12 +482,16 @@


 	}
 
 	if (mem->am_type != 1)
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-		return agp_generic_bind_memory(sc, mem, offset);
+		return (agp_generic_bind_memory(sc, mem, offset));
 
-	for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
+	if (isc->chiptype == CHIP_I830)
+		return (EINVAL);
+
+	for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) {
 		WRITE4(AGP_I810_GTT +
 		    (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, i | 3);
-
+	}
+	mem->am_is_bound = 1;
 	return (0);

}

@@ -365,8 +512,11 @@

 	if (mem->am_type != 1)
 		return (agp_generic_unbind_memory(sc, mem));
 
+	if (isc->chiptype == CHIP_I830)
+		return (EINVAL);
+
 	for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE)
 		WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0);
-
+	mem->am_is_bound = 0;
 	return (0);

}
Index: dev/pci/agpreg.h

RCS file: /cvs/src/sys/dev/pci/agpreg.h,v retrieving revision 1.1
diff -u -r1.1 agpreg.h

--- dev/pci/agpreg.h	12 Jul 2002 20:17:03 -0000	1.1
+++ dev/pci/agpreg.h	18 Mar 2003 19:34:00 -0000


@@ -154,4 +154,20 @@


 #define AGP_I810_DRT_POPULATED	0x01
 #define AGP_I810_GTT		0x10000
 
+/*
+ * Config registers for i830MG device 0
+ */
+#define AGP_I830_GCC0                   0x50
+#define AGP_I830_GCC1                   0x52
+#define AGP_I830_GCC1_DEV2              0x08
+#define AGP_I830_GCC1_DEV2_ENABLED      0x00
+#define AGP_I830_GCC1_DEV2_DISABLED     0x08
+#define AGP_I830_GCC1_GMS               0x70
+#define AGP_I830_GCC1_GMS_STOLEN_512    0x20
+#define AGP_I830_GCC1_GMS_STOLEN_1024   0x30
+#define AGP_I830_GCC1_GMS_STOLEN_8192   0x40
+#define AGP_I830_GCC1_GMASIZE           0x01
+#define AGP_I830_GCC1_GMASIZE_64        0x01
+#define AGP_I830_GCC1_GMASIZE_128       0x00

+
#endif /* !_PCI_AGPREG_H_ */
Index: dev/pci/pcidevs

RCS file: /cvs/src/sys/dev/pci/pcidevs,v retrieving revision 1.606
diff -u -r1.606 pcidevs

--- dev/pci/pcidevs	12 Mar 2003 21:44:09 -0000	1.606
+++ dev/pci/pcidevs	18 Mar 2003 19:34:41 -0000


@@ -1502,7 +1502,7 @@


 product INTEL 82860_PCI4	0x2536	82860 PCI-PCI
 product INTEL 82845G		0x2560	82845G/GL
 product INTEL 82845G_AGP	0x2561	82845G/GL/GV/GE/PE Host-AGP
-product INTEL 82845G_IV		0x2562	82845G/GL Video
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+product INTEL 82845G_IGD	0x2562	82845G/GL Video
 product INTEL 31244		0x3200	31244 SATA
 product INTEL 82830MP_IO_1	0x3575	82830MP CPU to I/O Bridge 1
 product INTEL 82830MP_AGP	0x3576	82830MP CPU to AGP Bridge

Index: dev/pci/pcidevs.h

RCS file: /cvs/src/sys/dev/pci/pcidevs.h,v retrieving revision 1.607
diff -u -r1.607 pcidevs.h

--- dev/pci/pcidevs.h	12 Mar 2003 21:44:43 -0000	1.607
+++ dev/pci/pcidevs.h	18 Mar 2003 19:34:48 -0000


@@ -1507,7 +1507,7 @@


 #define	PCI_PRODUCT_INTEL_82860_PCI4	0x2536		/* 82860 PCI-PCI */
 #define	PCI_PRODUCT_INTEL_82845G	0x2560		/* 82845G/GL */
 #define	PCI_PRODUCT_INTEL_82845G_AGP	0x2561		/* 82845G/GL/GV/GE/PE Host-AGP */
-#define	PCI_PRODUCT_INTEL_82845G_IV	0x2562		/* 82845G/GL Video */
+#define	PCI_PRODUCT_INTEL_82845G_IGD	0x2562		/* 82845G/GL Video */
 #define	PCI_PRODUCT_INTEL_31244	0x3200		/* 31244 SATA */
 #define	PCI_PRODUCT_INTEL_82830MP_IO_1	0x3575		/* 82830MP CPU to I/O Bridge 1 */
 #define	PCI_PRODUCT_INTEL_82830MP_AGP	0x3576		/* 82830MP CPU to AGP Bridge */

Index: dev/pci/pcidevs_data.h

RCS file: /cvs/src/sys/dev/pci/pcidevs_data.h,v retrieving revision 1.607
diff -u -r1.607 pcidevs_data.h

--- dev/pci/pcidevs_data.h	12 Mar 2003 21:44:43 -0000	1.607
+++ dev/pci/pcidevs_data.h	18 Mar 2003 19:34:48 -0000


@@ -2951,7 +2951,7 @@


 	    "82845G/GL/GV/GE/PE Host-AGP",
 	},
 	{
-	    PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82845G_IV,
+	    PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82845G_IGD,
 	    "82845G/GL Video",
 	},
 	{

Received on Tue Mar 18 19:21:44 2003

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