fsl_pamu.c 10.7 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241
/*
 * FSL PAMU driver
 *
 * Copyright 2012-2016 Freescale Semiconductor, Inc.
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <linux/log2.h>
#include <malloc.h>
#include <asm/fsl_pamu.h>

struct paace *ppaact;
struct paace *sec;
unsigned long fspi;

static inline int __ilog2_roundup_64(uint64_t val)
{
	if ((val & (val - 1)) == 0)
		return __ilog2_u64(val);
	else
		return  __ilog2_u64(val) + 1;
}


static inline int count_lsb_zeroes(unsigned long val)
{
	return ffs(val) - 1;
}

static unsigned int map_addrspace_size_to_wse(uint64_t addrspace_size)
{
	/* window size is 2^(WSE+1) bytes */
	return count_lsb_zeroes(addrspace_size >> PAMU_PAGE_SHIFT) +
		PAMU_PAGE_SHIFT - 1;
}

static unsigned int map_subwindow_cnt_to_wce(uint32_t subwindow_cnt)
{
       /* window count is 2^(WCE+1) bytes */
	return count_lsb_zeroes(subwindow_cnt) - 1;
}

static void pamu_setup_default_xfer_to_host_ppaace(struct paace *ppaace)
{
	set_bf(ppaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_PRIMARY);
	set_bf(ppaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
	       PAACE_M_COHERENCE_REQ);
}

static void pamu_setup_default_xfer_to_host_spaace(struct paace *spaace)
{
	set_bf(spaace->addr_bitfields, PAACE_AF_PT, PAACE_PT_SECONDARY);
	set_bf(spaace->domain_attr.to_host.coherency_required, PAACE_DA_HOST_CR,
	       PAACE_M_COHERENCE_REQ);
}

/** Sets up PPAACE entry for specified liodn
 *
 * @param[in] liodn      Logical IO device number
 * @param[in] win_addr   starting address of DSA window
 * @param[in] win-size   size of DSA window
 * @param[in] omi        Operation mapping index -- if ~omi == 0 then omi
				not defined
 * @param[in] stashid    cache stash id for associated cpu -- if ~stashid == 0
				then stashid not defined
 * @param[in] snoopid    snoop id for hardware coherency -- if ~snoopid == 0
				then snoopid not defined
 * @param[in] subwin_cnt number of sub-windows
 *
 * @return Returns 0 upon success else error code < 0 returned
 */
static int pamu_config_ppaace(uint32_t liodn, uint64_t win_addr,
	uint64_t win_size, uint32_t omi,
	uint32_t snoopid, uint32_t stashid,
	uint32_t subwin_cnt)
{
	struct paace *ppaace;

	if ((win_size & (win_size - 1)) || win_size < PAMU_PAGE_SIZE)
		return -1;

	if (win_addr & (win_size - 1))
		return -2;

	if (liodn > NUM_PPAACT_ENTRIES) {
		printf("Entries in PPACT not sufficient\n");
		return -3;
	}

	ppaace = &ppaact[liodn];

	/* window size is 2^(WSE+1) bytes */
	set_bf(ppaace->addr_bitfields, PPAACE_AF_WSE,
	       map_addrspace_size_to_wse(win_size));

	pamu_setup_default_xfer_to_host_ppaace(ppaace);

	if (sizeof(phys_addr_t) > 4)
		ppaace->wbah = (u64)win_addr >> (PAMU_PAGE_SHIFT + 20);
	else
		ppaace->wbah = 0;

	set_bf(ppaace->addr_bitfields, PPAACE_AF_WBAL,
	       (win_addr >> PAMU_PAGE_SHIFT));

	/* set up operation mapping if it's configured */
	if (omi < OME_NUMBER_ENTRIES) {
		set_bf(ppaace->impl_attr, PAACE_IA_OTM, PAACE_OTM_INDEXED);
		ppaace->op_encode.index_ot.omi = omi;
	} else if (~omi != 0) {
		return -3;
	}

	/* configure stash id */
	if (~stashid != 0)
		set_bf(ppaace->impl_attr, PAACE_IA_CID, stashid);

	/* configure snoop id */
	if (~snoopid != 0)
		ppaace->domain_attr.to_host.snpid = snoopid;

	if (subwin_cnt) {
		/* window count is 2^(WCE+1) bytes */
		set_bf(ppaace->impl_attr, PAACE_IA_WCE,
		       map_subwindow_cnt_to_wce(subwin_cnt));
		set_bf(ppaace->addr_bitfields, PPAACE_AF_MW, 0x1);
		ppaace->fspi = fspi;
		fspi = fspi + DEFAULT_NUM_SUBWINDOWS - 1;
	} else {
		set_bf(ppaace->addr_bitfields, PAACE_AF_AP, PAACE_AP_PERMS_ALL);
	}

	asm volatile("sync" : : : "memory");
	/* Mark the ppace entry valid */
	ppaace->addr_bitfields |= PAACE_V_VALID;
	asm volatile("sync" : : : "memory");

	return 0;
}

static int pamu_config_spaace(uint32_t liodn,
	uint64_t subwin_size, uint64_t subwin_addr, uint64_t size,
	uint32_t omi, uint32_t snoopid, uint32_t stashid)
{
	struct paace *paace;
	/* Align start addr of subwin to subwindoe size */
	uint64_t sec_addr = subwin_addr & ~(subwin_size - 1);
	uint64_t end_addr = subwin_addr + size;
	int size_shift = __ilog2_u64(subwin_size);
	uint64_t win_size = 0;
	uint32_t index, swse;
	unsigned long fspi_idx;

	/* Recalculate the size */
	size = end_addr - sec_addr;

	if (!subwin_size)
		return -1;

	if (liodn > NUM_PPAACT_ENTRIES) {
		printf("LIODN No programmed %d > no. of PPAACT entries %d\n",
		       liodn, NUM_PPAACT_ENTRIES);
		return -1;
	}

	while (sec_addr < end_addr) {
		debug("sec_addr < end_addr is %llx < %llx\n", sec_addr,
		      end_addr);
		paace = &ppaact[liodn];
		if (!paace)
			return -1;
		fspi_idx = paace->fspi;

		/* Calculating the win_size here as if we map in index 0,
			paace entry woudl need to  be programmed for SWSE */
		win_size = end_addr - sec_addr;
		win_size = 1 << __ilog2_roundup_64(win_size);

		if (win_size > subwin_size)
			win_size = subwin_size;
		else if (win_size < PAMU_PAGE_SIZE)
			win_size = PAMU_PAGE_SIZE;

		debug("win_size is %llx\n", win_size);

		swse = map_addrspace_size_to_wse(win_size);
		index = sec_addr >> size_shift;

		if (index == 0) {
			set_bf(paace->win_bitfields, PAACE_WIN_SWSE, swse);
			set_bf(paace->addr_bitfields, PAACE_AF_AP,
			       PAACE_AP_PERMS_ALL);
			sec_addr += subwin_size;
			continue;
		}

		paace = sec + fspi_idx + index - 1;

		debug("SPAACT:Writing at location %p, index %d\n", paace,
		      index);

		pamu_setup_default_xfer_to_host_spaace(paace);
		set_bf(paace->addr_bitfields, SPAACE_AF_LIODN, liodn);
		set_bf(paace->addr_bitfields, PAACE_AF_AP, PAACE_AP_PERMS_ALL);

		/* configure snoop id */
		if (~snoopid != 0)
			paace->domain_attr.to_host.snpid = snoopid;

		if (paace->addr_bitfields & PAACE_V_VALID) {
			debug("Reached overlap condition\n");
			debug("%d < %d\n", get_bf(paace->win_bitfields,
						  PAACE_WIN_SWSE), swse);
			if (get_bf(paace->win_bitfields, PAACE_WIN_SWSE) < swse)
				set_bf(paace->win_bitfields, PAACE_WIN_SWSE,
				       swse);
		} else {
			set_bf(paace->win_bitfields, PAACE_WIN_SWSE, swse);
		}

		paace->addr_bitfields |= PAACE_V_VALID;
		sec_addr += subwin_size;
	}

	return 0;
}

int pamu_init(void)
{
	u32 base_addr = CONFIG_SYS_PAMU_ADDR;
	struct ccsr_pamu *regs;
	u32 i = 0;
	u64 ppaact_phys, ppaact_lim, ppaact_size;
	u64 spaact_phys, spaact_lim, spaact_size;

	ppaact_size = sizeof(struct paace) * NUM_PPAACT_ENTRIES;
	spaact_size = sizeof(struct paace) * NUM_SPAACT_ENTRIES;

	/* Allocate space for Primary PAACT Table */
242 243 244
#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_PPAACT_ADDR))
	ppaact = (void *)CONFIG_SPL_PPAACT_ADDR;
#else
245 246 247
	ppaact = memalign(PAMU_TABLE_ALIGNMENT, ppaact_size);
	if (!ppaact)
		return -1;
248
#endif
249 250 251
	memset(ppaact, 0, ppaact_size);

	/* Allocate space for Secondary PAACT Table */
252 253 254
#if (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_SPAACT_ADDR))
	sec = (void *)CONFIG_SPL_SPAACT_ADDR;
#else
255 256 257
	sec = memalign(PAMU_TABLE_ALIGNMENT, spaact_size);
	if (!sec)
		return -1;
258
#endif
259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441
	memset(sec, 0, spaact_size);

	ppaact_phys = virt_to_phys((void *)ppaact);
	ppaact_lim = ppaact_phys + ppaact_size;

	spaact_phys = (uint64_t)virt_to_phys((void *)sec);
	spaact_lim = spaact_phys + spaact_size;

	/* Configure all PAMU's */
	for (i = 0; i < CONFIG_NUM_PAMU; i++) {
		regs = (struct ccsr_pamu *)base_addr;

		out_be32(&regs->ppbah, ppaact_phys >> 32);
		out_be32(&regs->ppbal, (uint32_t)ppaact_phys);

		out_be32(&regs->pplah, (ppaact_lim) >> 32);
		out_be32(&regs->pplal, (uint32_t)ppaact_lim);

		if (sec != NULL) {
			out_be32(&regs->spbah, spaact_phys >> 32);
			out_be32(&regs->spbal, (uint32_t)spaact_phys);
			out_be32(&regs->splah, spaact_lim >> 32);
			out_be32(&regs->splal, (uint32_t)spaact_lim);
		}
		asm volatile("sync" : : : "memory");

		base_addr += PAMU_OFFSET;
	}

	return 0;
}

void pamu_enable(void)
{
	u32 i = 0;
	u32 base_addr = CONFIG_SYS_PAMU_ADDR;
	for (i = 0; i < CONFIG_NUM_PAMU; i++) {
		setbits_be32((void *)base_addr + PAMU_PCR_OFFSET,
			     PAMU_PCR_PE);
		asm volatile("sync" : : : "memory");
		base_addr += PAMU_OFFSET;
	}
}

void pamu_reset(void)
{
	u32 i  = 0;
	u32 base_addr = CONFIG_SYS_PAMU_ADDR;
	struct ccsr_pamu *regs;

	for (i = 0; i < CONFIG_NUM_PAMU; i++) {
		regs = (struct ccsr_pamu *)base_addr;
	/* Clear PPAACT Base register */
		out_be32(&regs->ppbah, 0);
		out_be32(&regs->ppbal, 0);
		out_be32(&regs->pplah, 0);
		out_be32(&regs->pplal, 0);
		out_be32(&regs->spbah, 0);
		out_be32(&regs->spbal, 0);
		out_be32(&regs->splah, 0);
		out_be32(&regs->splal, 0);

		clrbits_be32((void *)regs + PAMU_PCR_OFFSET, PAMU_PCR_PE);
		asm volatile("sync" : : : "memory");
		base_addr += PAMU_OFFSET;
	}
}

void pamu_disable(void)
{
	u32 i  = 0;
	u32 base_addr = CONFIG_SYS_PAMU_ADDR;


	for (i = 0; i < CONFIG_NUM_PAMU; i++) {
		clrbits_be32((void *)base_addr + PAMU_PCR_OFFSET, PAMU_PCR_PE);
		asm volatile("sync" : : : "memory");
		base_addr += PAMU_OFFSET;
	}
}


static uint64_t find_max(uint64_t arr[], int num)
{
	int i = 0;
	int max = 0;
	for (i = 1 ; i < num; i++)
		if (arr[max] < arr[i])
			max = i;

	return arr[max];
}

static uint64_t find_min(uint64_t arr[], int num)
{
	int i = 0;
	int min = 0;
	for (i = 1 ; i < num; i++)
		if (arr[min] > arr[i])
			min = i;

	return arr[min];
}

static uint32_t get_win_cnt(uint64_t size)
{
	uint32_t win_cnt = DEFAULT_NUM_SUBWINDOWS;

	while (win_cnt && (size/win_cnt) < PAMU_PAGE_SIZE)
		win_cnt >>= 1;

	return win_cnt;
}

int config_pamu(struct pamu_addr_tbl *tbl, int num_entries, uint32_t liodn)
{
	int i = 0;
	int ret = 0;
	uint32_t num_sec_windows = 0;
	uint32_t num_windows = 0;
	uint64_t min_addr, max_addr;
	uint64_t size;
	uint64_t subwin_size;
	int sizebit;

	min_addr = find_min(tbl->start_addr, num_entries);
	max_addr = find_max(tbl->end_addr, num_entries);
	size = max_addr - min_addr + 1;

	if (!size)
		return -1;

	sizebit = __ilog2_roundup_64(size);
	size = 1 << sizebit;
	debug("min start_addr is %llx\n", min_addr);
	debug("max end_addr is %llx\n", max_addr);
	debug("size found is  %llx\n", size);

	if (size < PAMU_PAGE_SIZE)
		size = PAMU_PAGE_SIZE;

	while (1) {
		min_addr = min_addr & ~(size - 1);
		if (min_addr + size > max_addr)
			break;
		size <<= 1;
		if (!size)
			return -1;
	}
	debug("PAACT :Base addr is %llx\n", min_addr);
	debug("PAACT : Size is %llx\n", size);
	num_windows = get_win_cnt(size);
	/* For a single window, no spaact entries are required
	 * sec_sub_window count = 0 */
	if (num_windows > 1)
		num_sec_windows = num_windows;
	else
		num_sec_windows = 0;

	ret = pamu_config_ppaace(liodn, min_addr,
			size , -1, -1, -1, num_sec_windows);

	if (ret < 0)
		return ret;

	debug("configured ppace\n");

	if (num_sec_windows) {
		subwin_size = size >> count_lsb_zeroes(num_sec_windows);
		debug("subwin_size is %llx\n", subwin_size);

		for (i = 0; i < num_entries; i++) {
			ret = pamu_config_spaace(liodn,
				subwin_size, tbl->start_addr[i] - min_addr,
				tbl->size[i], -1, -1, -1);

			if (ret < 0)
				return ret;
		}
	}

	return ret;
}