Lines Matching full:tee
3 * AMD Trusted Execution Environment (TEE) interface
18 #include <linux/psp-tee.h>
21 #include "tee-dev.h"
25 static int tee_alloc_ring(struct psp_tee_device *tee, int ring_size) in tee_alloc_ring() argument
27 struct ring_buf_manager *rb_mgr = &tee->rb_mgr; in tee_alloc_ring()
49 static void tee_free_ring(struct psp_tee_device *tee) in tee_free_ring() argument
51 struct ring_buf_manager *rb_mgr = &tee->rb_mgr; in tee_free_ring()
65 static int tee_wait_cmd_poll(struct psp_tee_device *tee, unsigned int timeout, in tee_wait_cmd_poll() argument
72 *reg = ioread32(tee->io_regs + tee->vdata->cmdresp_reg); in tee_wait_cmd_poll()
79 dev_err(tee->dev, "tee: command timed out, disabling PSP\n"); in tee_wait_cmd_poll()
86 struct tee_init_ring_cmd *tee_alloc_cmd_buffer(struct psp_tee_device *tee) in tee_alloc_cmd_buffer() argument
94 cmd->hi_addr = upper_32_bits(tee->rb_mgr.ring_pa); in tee_alloc_cmd_buffer()
95 cmd->low_addr = lower_32_bits(tee->rb_mgr.ring_pa); in tee_alloc_cmd_buffer()
96 cmd->size = tee->rb_mgr.ring_size; in tee_alloc_cmd_buffer()
98 dev_dbg(tee->dev, "tee: ring address: high = 0x%x low = 0x%x size = %u\n", in tee_alloc_cmd_buffer()
109 static int tee_init_ring(struct psp_tee_device *tee) in tee_init_ring() argument
119 ret = tee_alloc_ring(tee, ring_size); in tee_init_ring()
121 dev_err(tee->dev, "tee: ring allocation failed %d\n", ret); in tee_init_ring()
125 tee->rb_mgr.wptr = 0; in tee_init_ring()
127 cmd = tee_alloc_cmd_buffer(tee); in tee_init_ring()
129 tee_free_ring(tee); in tee_init_ring()
140 tee->io_regs + tee->vdata->cmdbuff_addr_lo_reg); in tee_init_ring()
142 tee->io_regs + tee->vdata->cmdbuff_addr_hi_reg); in tee_init_ring()
144 tee->io_regs + tee->vdata->cmdresp_reg); in tee_init_ring()
146 ret = tee_wait_cmd_poll(tee, TEE_DEFAULT_TIMEOUT, ®); in tee_init_ring()
148 dev_err(tee->dev, "tee: ring init command timed out\n"); in tee_init_ring()
149 tee_free_ring(tee); in tee_init_ring()
154 dev_err(tee->dev, "tee: ring init command failed (%#010lx)\n", in tee_init_ring()
156 tee_free_ring(tee); in tee_init_ring()
166 static void tee_destroy_ring(struct psp_tee_device *tee) in tee_destroy_ring() argument
171 if (!tee->rb_mgr.ring_start) in tee_destroy_ring()
178 tee->io_regs + tee->vdata->cmdresp_reg); in tee_destroy_ring()
180 ret = tee_wait_cmd_poll(tee, TEE_DEFAULT_TIMEOUT, ®); in tee_destroy_ring()
182 dev_err(tee->dev, "tee: ring destroy command timed out\n"); in tee_destroy_ring()
184 dev_err(tee->dev, "tee: ring destroy command failed (%#010lx)\n", in tee_destroy_ring()
189 tee_free_ring(tee); in tee_destroy_ring()
195 struct psp_tee_device *tee; in tee_dev_init() local
199 tee = devm_kzalloc(dev, sizeof(*tee), GFP_KERNEL); in tee_dev_init()
200 if (!tee) in tee_dev_init()
203 psp->tee_data = tee; in tee_dev_init()
205 tee->dev = dev; in tee_dev_init()
206 tee->psp = psp; in tee_dev_init()
208 tee->io_regs = psp->io_regs; in tee_dev_init()
210 tee->vdata = (struct tee_vdata *)psp->vdata->tee; in tee_dev_init()
211 if (!tee->vdata) { in tee_dev_init()
213 dev_err(dev, "tee: missing driver data\n"); in tee_dev_init()
217 ret = tee_init_ring(tee); in tee_dev_init()
219 dev_err(dev, "tee: failed to init ring buffer\n"); in tee_dev_init()
223 dev_notice(dev, "tee enabled\n"); in tee_dev_init()
230 dev_notice(dev, "tee initialization failed\n"); in tee_dev_init()
237 struct psp_tee_device *tee = psp->tee_data; in tee_dev_destroy() local
239 if (!tee) in tee_dev_destroy()
242 tee_destroy_ring(tee); in tee_dev_destroy()
245 static int tee_submit_cmd(struct psp_tee_device *tee, enum tee_cmd_id cmd_id, in tee_submit_cmd() argument
254 mutex_lock(&tee->rb_mgr.mutex); in tee_submit_cmd()
260 (tee->rb_mgr.ring_start + tee->rb_mgr.wptr); in tee_submit_cmd()
262 rptr = ioread32(tee->io_regs + tee->vdata->ring_rptr_reg); in tee_submit_cmd()
265 * for response from TEE in tee_submit_cmd()
267 if (!(tee->rb_mgr.wptr + sizeof(struct tee_ring_cmd) == rptr || in tee_submit_cmd()
271 dev_dbg(tee->dev, "tee: ring buffer full. rptr = %u wptr = %u\n", in tee_submit_cmd()
272 rptr, tee->rb_mgr.wptr); in tee_submit_cmd()
274 /* Wait if ring buffer is full or TEE is processing data */ in tee_submit_cmd()
275 mutex_unlock(&tee->rb_mgr.mutex); in tee_submit_cmd()
277 mutex_lock(&tee->rb_mgr.mutex); in tee_submit_cmd()
282 (tee->rb_mgr.wptr + sizeof(struct tee_ring_cmd) == rptr || in tee_submit_cmd()
284 dev_err(tee->dev, "tee: ring buffer full. rptr = %u wptr = %u response flag %u\n", in tee_submit_cmd()
285 rptr, tee->rb_mgr.wptr, cmd->flag); in tee_submit_cmd()
308 tee->rb_mgr.wptr += sizeof(struct tee_ring_cmd); in tee_submit_cmd()
309 if (tee->rb_mgr.wptr >= tee->rb_mgr.ring_size) in tee_submit_cmd()
310 tee->rb_mgr.wptr = 0; in tee_submit_cmd()
313 iowrite32(tee->rb_mgr.wptr, tee->io_regs + tee->vdata->ring_wptr_reg); in tee_submit_cmd()
321 mutex_unlock(&tee->rb_mgr.mutex); in tee_submit_cmd()
326 static int tee_wait_cmd_completion(struct psp_tee_device *tee, in tee_wait_cmd_completion() argument
340 dev_err(tee->dev, "tee: command 0x%x timed out, disabling PSP\n", in tee_wait_cmd_completion()
352 struct psp_tee_device *tee; in psp_tee_process_cmd() local
367 tee = psp->tee_data; in psp_tee_process_cmd()
369 ret = tee_submit_cmd(tee, cmd_id, buf, len, &resp); in psp_tee_process_cmd()
373 ret = tee_wait_cmd_completion(tee, resp, TEE_DEFAULT_TIMEOUT); in psp_tee_process_cmd()